HALL ELEMENT SEALING STRUCTURE AND MOTOR USING SAME

STRUCTURE D'ETANCHEITE D'ELEMENT A EFFET HALL ET MOTEUR L'UTILISANT

English Abstract

A hall element sealing structure and a motor using same. The hall element sealing structure comprises a box (1), a hall circuit board (2), and a hall element (3) installed on the hall circuit board. A cavity (10) is formed in the middle of the box (1). A supporting boss (11) is disposed on the bottom wall of the cavity (10), and the bottom wall of the cavity (10) is recessed to form an installing groove (12). The hall circuit board (2) is supported on the top surface of the supporting boss (11), and the hall element (3) on the hall circuit board (2) extends into the installing groove (12). A sealant (4) is poured into the cavity (10). The sealant (4) seals the hall element (3) in the installing groove (12) and covers the outside of the hall circuit board (2). The sealing structure is simple in structure, convenient to install, and firm, has good sealing and waterproof performance and can work reliably.

French Abstract

L'invention porte sur une structure d'étanchéité d'élément à effet Hall et sur un moteur l'utilisant. La structure d'étanchéité d'élément à effet Hall comprend une boîte (1), une carte de circuit imprimé à effet Hall (2), et un élément à effet Hall (3) installé sur la carte de circuit imprimé à effet Hall. Une cavité (10) est formée au centre de la boîte (1). Un bossage de support (11) est disposé sur la paroi inférieure de la cavité (10), et la paroi inférieure de la cavité (10) est évidée pour former une rainure d'installation (12). La carte de circuit imprimé à effet Hall (2) est supportée sur la surface supérieure du bossage de support (11), et l'élément à effet Hall (3) sur la carte de circuit imprimé à effet Hall (2) s'étend dans la rainure d'installation (12). Un matériau d'étanchéité (4) est versé dans la cavité (10). Le matériau d'étanchéité (4) scelle l'élément à effet Hall (3) dans la rainure d'installation (12) et recouvre l'extérieur de la carte de circuit imprimé à effet Hall (2). La structure d'étanchéité est de structure simple, pratique à installer, et ferme, a de bonnes performances d'étanchéité et d'étanchéité à l'eau et peut fonctionner de manière fiable.

Claims

CLAIMS
1. A sealing structure of a Hall element, characterized by comprising:
a) a box body (1), the box body (1) comprising a chamber (10) comprising
a bottom wall;
b) a circuit board (2); and
c) a Hall element (3), the Hall element being disposed on the circuit board
(2);
wherein
the bottom wall of the chamber (10) is provided with a supporting boss (11),
and
the circuit board (2) is supported by an upper surface of the supporting boss
(11);
the bottom wall of the chamber (10) is depressed to form a mounting slot (12);
the Hall element (3) of the circuit board (2) is inserted into the mounting
slot (12);
sealing glue (4) is injected into the chamber (10) to seal the Hall element
(3) in the
mounting slot (12) and coat the circuit board (2).
2. The sealing structure of claim 1, characterized in that a plurality of
columns (13)
protrudes upward from the bottom wall of the chamber (10); the columns (13)
are
sheathed in vias (21) on the circuit board (2).
3. The sealing structure of claim 1 or 2, characterized in that an outer
wall of the
box body (1) is provided with a plurality of mounting feet (14); the mounting
feet
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(14) are provided with mounting holes (140).
4. A motor, characterized by comprising:
a) a rotary shaft (5);
b) a rotor assembly (6);
c) a stator assembly (7);
d) a shell assembly (8);
e) a box body (1);
f) a circuit board (2); and
g) a Hall element (3);
wherein
the rotor assembly (6) is disposed on the rotary shaft (5);
the stator assembly (7) and the shell assembly (8) are integrated and sleeved
on
the rotor assembly (6);
the stator assembly (7) comprises a stator core (71), a terminal insulator
(72), and
coil windings (73); the terminal insulator (72) is disposed on one end of the
stator
core (71); the coil windings (73) are coiled on the terminal insulator (72);
the box
body (1) is disposed on the terminal insulator (72), and the box body (1)
comprises a chamber (10) comprising a bottom wall;
the bottom wall of the chamber (10) is provided with a supporting boss (11),
and
the circuit board (2) is supported by an upper surface of the supporting boss
(11);
the bottom wall of the chamber (10) is depressed to form a mounting slot (12);
the
Hall element (3) of the circuit board (2) is inserted into the mounting slot
(12);
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sealing glue (4) is injected into the chamber (10) to seal the Hall element
(3) in the
mounting slot (12) and coat the circuit board (2).
5. The motor of claim 4, characterized in that an outer wall of the box
body (1) is
provided with three mounting feet (14); the terminal insulator (72) comprises
a
circular yoke (721), and a plurality of tooth portions (722) stretching out of
the
circular yoke (721); winding slots (723) are formed between every two tooth
portions (722); at an inner side of one winding slot (723), a left support
column
(7221) and a right support column (7222) are disposed on the upper surface of
two
adjacent tooth portions (722); at an outer side of the winding slot (723), a
first
support column (7211) is disposed on the upper surface of the circular yoke
(721);
the box body (1) is disposed on upper surfaces of the first support column
(7211),
the left support column (7221), and the right support column (7222) via the
three
mounting feet (14).
6. The motor of claim 5, characterized in that the bottom wall of the
chamber (10)
is depressed to form the mounting slot (12), and a lug boss (15) is formed on
the
bottom of the box body (1); a left base (7223) is disposed on the bottom of
the left
support column (7221) and on the upper surface of the tooth portion (722); a
right
base (7224) is disposed on the bottom of the right support column (7222) and
on
the upper surface of the tooth portion (722); a slot (7225) is formed between
the
left base (7223) and the right base (7224); the lug boss (15) is sheathed in
the slot
(7225) and is supported by the upper surface of the tooth portion (722); the
Hall
element (3) is sheathed in the mounting slot (12) and leans outside of the
rotor
assembly (6).

7. The motor of claim 4, 5, or 6, characterized in that a plurality of
columns (13)
protrudes upward from the bottom wall of the chamber (10); the columns (13)
are
sheathed in vias (21) on the circuit board (2).
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Description

CA 02934590 2016-06-20
HAIL ELEMENT SEALING STRUCTURE AND MOTOR USING SAME
TECHNICAL FIELD
[0001] The invention relates to a sealing structure of a Hall element and a
motor
comprising the same.
DESCRIPTION OF RELATED ART
[0002] Typically, the circuit board of motors for mounting a Hall element is
often directly
installed on the terminal insulator of the stator assembly, and the Hall
element protrudes
out of the circuit board and leans against the outer end of the rotor assembly
to detect
position signals of the rotor. However, the installation structure of the Hall
element is
often unreliable, and the circuit board and the Hall element are easily
detached from the
terminal insulator when the motor is running or when vibration happens.
Meanwhile,
because the circuit board and the Hall element are exposed, they tend to be
stained or
contaminated, which adversely affects the operation of the motor, and requires
high
maintenance costs, and decreases the market competitiveness of products_
SUMMARY OF THE INVENTION
[0003] In view of the above-described problems, it is one objective of the
invention to
provide a sealing structure of a Hall element and a motor comprising the same.
The
sealing structure features simple, convenient and reliable installation. The
circuit board
and the Hall element of the sealing structure have good sealing and waterproof
properties,
and stable working performance. The motor features simple structure and
convenient
installation, and strong market competitiveness.
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CA 02934590 2016-06-20
[0004] To achieve the above objective, in accordance with one embodiment of
the
invention, there is provided a sealing structure of a Hall element,
comprising: a box body,
a circuit board, and a Hall element disposed on the circuit board. The box
body is
provided with a chamber comprising a bottom wall. The bottom wall of the
chamber is
provided with a supporting boss, and the circuit board is supportedby an upper
surface of
the supporting boss. The bottom wall of the chamber is depressed to form a
mounting slot.
The Hall element of the circuit board is inserted into the mounting slot.
Sealing glue is
injected into the chamber to seal the Hall element in the mounting slot and
coat the circuit
board.
[0005] In a class of this embodiment, a plurality of columns protrudes upward
from the
bottom wall of the chamber. The columns are sheathed in vias on the circuit
board.
[0006] In a class of this embodiment, an, outer wall of the box body is
provided with a
plurality of mounting feet. The mounting feet are provided with mounting
holes.
[0007] A motor comprises a rotary shaft, a rotor assembly, a stator assembly,
a shell
assembly, a box body, a circuit board, and a Hall element. The rotor assembly
is disposed
on the rotary shaft. The stator assembly and the shell assembly are integrated
and sleeved
on the rotor assembly. The stator assembly comprises a stator core, a terminal
insulator,
and coil windings. The terminal insulator is disposed on one end of the stator
core. The
coil windings are coiled on the terminal insulator. The box body is disposed
on the
terminal insulator, and the box body is provided with a chamber comprising a
bottom
wall. The bottom wall of the chamber is provided with a supporting boss, and
the circuit
board is supported by an upper surface of the supporting boss. The bottom wall
of the
chamber is depressed to form a mounting slot. The Hall element of the circuit
board is
inserted into the mounting slot. Sealing glue is injected into the chamber to
seal the Hall
element in the mounting slot and coat the circuit board.
[0008] In a class of this embodiment, the outer wall of the box body is
provided with
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three mounting feet. The terminal insulator comprises a circular yoke, and a
plurality of
tooth portions stretching out of the circular yoke. Winding slots are formed
between
every two tooth portions. At an inner side of one winding slot, a left support
column and a
right support column are disposed on the upper surface of every two adjacent
tooth
portions. At an outer side of the winding slot, a first support column is
disposed on the
upper surface of the circular yoke. The box body is disposed on upper surfaces
of the first
support column, the left support column, and the right support column via the
three
mounting feet.
[0009] In a class of this embodiment, the bottom wall of the chamber is
depressed to
form the mounting slot, and a lug boss is formed on the bottom of the box
body. A left
base is disposed on the bottom of the left support column, and the upper
surface of the
tooth portion. A right base is disposed on the bottom of the right support
column, and the
upper surface of the tooth portion. A slot is formed between the left base and
the right
base. The lug boss is sheathed in the slot and is supported by the upper
surface of the
tooth portion. The Hall element is sheathed in the mounting slot and leans
outside of the
rotor assembly.
[0010] In a class of this embodiment, a plurality of columns protrudes upward
from the
bottom wall of the chamber. The columns are sheathed in vias on the circuit
board.
[0011] Compared with existing technologies, advantages of the sealing
structure of a Hall
element and a motor comprising the same are summarized as follows:
[0012] 1. The bottom wall of the chamber is provided with a supporting boss
and the
circuit board is supported by the upper surface of the supporting boss. The
bottom wall of
the chamber is depressed to form a mounting slot. The Hall element of the
circuit board is
inserted into the mounting slot. Sealing glue is injected into the chamber to
seal the Hall
element in. the mounting slot and coat the circuit board. The sealing
structure features
simple, convenient and reliable installation. The circuit board and the Hall
element of the
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sealing structure have good sealing and waterproof properties, thus avoiding
damage
from contaminants, and guaranteeing the reliable operation thereof.
[0013] 2. A plurality of columns protrudes upward from the bottom wall of the
chamber.
The columns are sheathed in vias on the circuit board. The arrangement is
simple; the
positioning is convenient and the assembling efficiency is high.
[0014] 3. The outer wall of the box body is provided with a plurality of
mounting feet.
The mounting feet are provided with mounting holes, so it is convenient to
install the box
body on the stator assembly.
[0015] 4. The motor features simple structure and convenient installation. The
circuit
board and the Hall element have good sealing and waterproof properties, and
reliable
working performance. The motor has strong market competitiveness.
[0016] 5. The box body is disposed on the upper surfaces of the first support
column, the
left support column and the right support column via three mounting feet. The
arrangement is simple and the installation is convenient and reliable.
[0017] 6. The lug boss is sheathed in the slot and is supported by the upper
surface of the
tooth portion. The Hall element is sheathed in the mounting slot and leans
against the
outer end of the rotor assembly. The arrangement is simple, and the
installation is
convenient and reliable, thereby guaranteeing the reliability of the Hall
element.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1 is a stereogram of a sealing structure of a Hall element in
accordance with
one embodiment of the invention;
10019] FIG 2 is an exploded view of a sealing structure of a Hall element in
accordance
with one embodiment of the invention;
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[0020] FIG 3 is a top view of a sealing structure of a Hall element in
accordance with
one embodiment of the invention;
[0021] FIG. 4 is a cross-sectional view taken from line A-A in FIG. 3 in
accordance with
one embodiment of the invention;
[0022] FIG 5 is a stereogram of a motor in accordance with one embodiment of
the
invention;
[0023] FIG. 6 is an exploded view of a motor in accordance with one embodiment
of the
invention;
[0024] FIG 7 is an enlarged view taken from B-B part in FIG. 6 in accordance
with one
embodiment of the invention;
[0025] FIG. 8 is a top view of a motor in accordance with one embodiment of
the
invention;
[0026] FIG. 9 is a cross-sectional view taken from line C-C in FIG 8 in
accordance with
one embodiment of the invention; and
[0027] FIG. 10 is an enlarged view taken from D-D part in FIG. 9 in accordance
with one
embodiment of the invention.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] For further illustrating the invention, experiments detailing a sealing
structure of a
Hall element and a motor comprising the same are described below. It should be
noted
that the following examples are intended to describe and not to limit the
invention.
Example 1

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[0029] As shown by FIGS. 1-4, a sealing structure of a Hall element comprises:
a box
body 1, a circuit board 2, and a Hall element 3 disposed on the circuit board
2. A box
body 1 comprising a chamber 10. A bottom wall of the chamber 10 is provided
with a
supporting boss 11, and the circuit board 2 is supported by an upper surface
of the
supporting boss 11. The bottom wall of the chamber 10 is depressed to form a
mounting
slot 12. The Hall element 3 of the circuit board 2 is inserted into the
mounting slot 12.
Sealing glue 4 is injected into the chamber 10 to seal the Hall element 3 in
the mounting
slot 12 and coat the circuit board 2.
[0030] A plurality of columns 13 protrudes upward from the bottom wall of the
chamber
10. The columns 13 are sheathed in vias 21 on the circuit board 2. An outer
wall of the
box body 1 is provided with a plurality of mounting feet 14. The mounting feet
14 are
provided with mounting holes 140.
Example 2
[0031] As shown by FIGS. 5-10, a motor comprises a rotary shaft 5, a rotor
assembly 6, a
stator assembly 7, a shell assembly 8, a box body 1, a circuit board 2, and a
Hall element
3. The shell assembly 8 comprises a shell 81 and a cover 82. The rotor
assembly 6 is
disposed on the rotary shaft 5. The stator assembly 7 and the shell 81 are
integrated and
sleeved on the rotor assembly 6. The cover is disposed on the two ends of the
shell 81.
The two ends of the rotary shaft are supported by the bearing of the cover 82.
The stator
assembly 7 comprises a stator core 71, a terminal insulator 72, and coil
windings 73. The
terminal insulator 72 is disposed on one end of the stator core 71. The coil
windings 73
are coiled on the terminal insulator 72. The box body 1 is disposed on the
terminal
insulator 72, and the box body 1 comprising a chamber 10. A bottom wall of the
chamber
is provided with a supporting boss 11, and the circuit board 2 is supported by
an upper
surface of the supporting boss 11. The bottom wall of the chamber 10 is
depressed to
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CA 02934590 2016-06-20
form a mounting slot 12. The Hall element 3 of the circuit board 2 is inserted
into the
mounting slot 12. Sealing glue 4 is injected into the chamber 10 to seal the
Hall element 3
in the mounting slot 12 and coat the circuit board 2. The outer wall of the
box body 1 is
provided with three mounting feet 14. The terminal insulator 72 comprises a
circular yoke
721, and a plurality of tooth portions 722 stretching out of the circular yoke
721. Winding
slots 723 are formed between every two tooth portions 722. At an inner side of
one
winding slot 723, a left support column 7221 and a right support column 7222
are
disposed on the upper surface of every two adjacent tooth portions 722. At an
outer side
of the winding slot 723, a first support column 7211 is disposed on the upper
surface of
the circular yoke 721. The box body 1 is disposed on upper surfaces of the
first support
column 7211, the left support column 7221, and the right support column 7222
via the
three mounting feet 14. The bottom wall of the chamber 10 is depressed to form
the
mounting slot 12, and a lug boss 15 is formed on the bottom of the box body 1.
A left
base 7223 is disposed on the bottom of the left support column 7221, and the
upper
surface of the tooth portion 722. A right base 7224 is disposed on the bottom
of the right
support column 7222, and the upper surface of the tooth portion 722. A slot
7225 is
formed between the left base 7223 and the right base 7224. The lug boss 15 is
sheathed in
the slot 7225 and is supported by the upper surface of the tooth portion 722.
The Hall
element 3 is sheathed in the mounting slot 12 and leans outside of the rotor
assembly 6. A
plurality of columns 13 protrudes upward from the bottom wall of the chamber
10. The
columns 13 are sheathed in vias 21 on the circuit board 2.
[00321 While particular embodiments of the invention have been shown and
described, it
will be obvious to those skilled in the art that changes and modifications may
be made
without departing from the invention in its broader aspects, and therefore,
the aim in the
appended claims is to cover all such changes and modifications as fall within
the true
spirit and scope of the invention.
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Representative Drawing