A mounting structure for a brushless motor Hall sensor

Abstract

The invention discloses an installation structure of a brushless motor Hall sensor, which relates to the technical field of motor equipment, and comprises a stator coil frame and a circuit board of the Hall sensor, wherein the stator coil frame and the circuit board are connected via a locking mechanism, wherein the locking mechanism comprises: a positioning component, which comprises a reserved hole provided on the circuit board, wherein a limiting column fixed to the top surface of the stator coil frame is adapted to be plugged into the reserved hole; a pin locking component, which comprises an insertion interface provided on the side of the limiting column, wherein a blocking unit is movably installed on the circuit board, wherein the blocking unit is inserted into the insertion interface, and then the circuit board is in a locked state on the stator coil frame. The invention can ensure that the Hall sensor and the stator assembly are at a preset position angle through the locking mechanism, and also improves the integration degree of the brushless motor, and has a simple structure and is easy to assemble, which is beneficial to the overall assembly efficiency of the product.

Description

Technical Field

[0001] The invention relates to the technical field of motor equipment, and in particular to an installation structure of a brushless motor Hall sensor. Background Art

[0002] The brushless motor is mainly composed of three parts: the stator assembly, the rotor assembly and the driver assembly. Different from the brushed motor, the rotor assembly of the brushless motor is sleeved outside the stator assembly for axial rotation, and the driver assembly includes a Hall sensor assembly for determining the rotation position of the rotor, thereby facilitating the control circuit on and off switching;

[0003] Existing brushless motors, such as the Chinese patent publication number: CN105356644B, the name of the patent is "brushless motor", the patent includes "a stator and a rotor, the stator includes two end covers and a bearing fixed to the outer side of each end cover, the rotor includes a rotating shaft, the rotating shaft passes through the bearing, and the bearing rotatably supports the rotating shaft";

[0004] In the current motor industry, when designing a brushless motor, an independent magnetic ring sensing design is usually adopted. The Hall element is fixed to the end of the motor housing through a plate bracket, thereby realizing the sensing drive of the magnetic ring magnetic pole position. The shortcoming of the existing solution is that since the Hall sensor and the stator assembly are installed separately on the motor housing, it is necessary to ensure that the Hall sensor and the stator assembly are at a preset position angle during installation, and the installation position accuracy is relatively high. To solve the above problem, we propose a mounting structure for a brushless motor Hall sensor. Summary of the invention

[0005] The object of the present invention is to provide a mounting structure for a brushless motor Hall sensor to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A mounting structure of a brushless motor Hall sensor comprises a stator coil frame and a circuit board of the Hall sensor, wherein the stator coil frame and the circuit board are connected via a locking mechanism, and the locking mechanism comprises:

[0008] A positioning assembly, comprising a reserved hole provided on the circuit board, wherein a limiting column fixed to the top surface of the stator coil frame is adapted to be inserted into the reserved hole;

[0009] The pin lock assembly comprises an insertion port opened on the side of the limiting column, a blocking unit is movably installed on the circuit board, and the blocking unit extends into the insertion port, so that the circuit board is in a locked state on the stator coil frame.

[0010] Preferably, the stator coil frame includes a connecting ring sleeve, and winding shaft blocks are evenly distributed and fixed on the inner wall surface of the connecting ring sleeve, and the winding shaft blocks and the end surface of the connecting ring sleeve constitute the top surface of the stator coil frame.

[0011] Preferably, an elastic isolating member is fixed on the top surface of the stator coil frame, and the elastic isolating member includes an elastic insulating pad, and the elastic insulating pad is provided with a through hole for the limiting column to pass through.

[0012] Preferably, the blocking unit includes a socket unit, and the socket unit is slidably connected to the circuit board via a sliding mechanism, and the socket unit has a plug position extending into the plug interface and an escape position detached from the plug interface.

[0013] Preferably, a plug unit is adapted to be plugged into the socket unit, and the plug unit can be electrically plugged into the socket unit in the plug position.

[0014] Preferably, a through hole for the socket unit to be inserted is formed at the top of the limiting column.

[0015] Preferably, the socket unit comprises a frame box, a conductive sheet is fixed inside the frame box, and the conductive sheet is electrically connected to the circuit board through a conductive wire.

[0016] Preferably, the plug unit comprises a plug shell, and a conductive member is hingedly connected to one end of the plug shell.

[0017] Preferably, a first slide groove unit is provided on the outer side surface of the frame box, and a second slide groove unit is provided on the inner wall surface of the plug interface. When the socket unit is in the plug position, the first slide groove unit is aligned with the second slide groove unit to form a sliding channel for the conductive part to pass through.

[0018] Preferably, the conductive member is a conductive rod capable of moving in the first slide groove unit, and a protruding block capable of moving in the second slide groove unit is fixed to the side surface of the bottom end of the conductive rod.

[0019] In the above technical scheme, the present invention provides a mounting structure for a brushless motor Hall sensor, which fixedly connects the stator coil frame with the circuit board of the Hall sensor. On the one hand, the positioning component in the locking mechanism can ensure that the Hall sensor and the stator component are at a preset position angle, thereby improving the accuracy of the Hall sensor sensing magnetic pole. On the other hand, the stator coil frame and the circuit board of the Hall sensor are fixedly connected through the pin locking component, thereby improving the integration of the brushless motor. During assembly, the fixed stator coil can be directly installed into the motor casing to complete a stator component. The structure is simple and easy to assemble, which is beneficial to the overall assembly efficiency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of an end surface of a mounting structure of a brushless motor Hall sensor of the present invention;

[0022] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 For the present invention Figure 1 Partial cross-sectional view at the middle BB;

[0024] Figure 4 A schematic diagram of a plug unit of a mounting structure of a brushless motor Hall sensor of the present invention;

[0025] Figure 5 It is a schematic diagram of the first slideway slot unit of the installation structure of the brushless motor Hall sensor of the present invention on the side of the frame box;

[0026] Figure 6 The present invention is a schematic diagram of a first slideway groove unit of a brushless motor Hall sensor installation structure on a side wall of an insertion interface.

[0027] Description of reference numerals:

[0028] 1. stator coil frame; 1.1. connecting ring sleeve; 1.2. winding shaft block; 2. circuit board; 3. positioning assembly; 3.1. reserved hole; 3.2. limit column; 3.3. through hole; 4. pin lock assembly; 4.1. plug interface; 4.2. blocking unit; 4.21. socket unit; 4.211. frame box; 4.212. conductive sheet; 4.213. conductive wire; 4.22. sliding mechanism; 4.221. slide groove; 4.222. recessed groove; 4.223. slide Block; 4.23, plug unit; 4.231, plug shell; 4.232, conductive member; 4.2321, conductive rod; 4.2322, protruding block; 5, elastic isolating member; 5.1, elastic insulating pad; 5.2, through-port; 6, first slideway groove unit; 6.1, first vertical groove; 6.2, conductive plate; 7, second slideway groove unit; 7.1, insert slideway; 7.2, remove slideway; 7.3, undulating groove structure; 7.31, first inclined groove; 7.32, second inclined groove. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] See also Figure 1-6 An embodiment of the present invention provides a mounting structure of a brushless motor Hall sensor, comprising a stator coil frame 1 and a circuit board 2 of the Hall sensor, wherein the stator coil frame 1 and the circuit board 2 are connected via a locking mechanism, and the locking mechanism comprises:

[0031] The positioning assembly 3 includes a reserved hole 3.1 formed on the circuit board 2, and a limiting column 3.2 fixed to the top surface of the stator coil frame 1 is adapted to be inserted into the reserved hole 3.1;

[0032] The pin lock assembly 4 includes an insertion port 4.1 provided on the side of the limit column 3.2, and a blocking unit 4.2 is movably mounted on the circuit board 2. The blocking unit 4.2 extends into the insertion port 4.1, and the circuit board 2 is locked on the stator coil frame 1;

[0033] Specifically, the circuit board 2 is electrically connected to the Hall sensor, the number of the reserved holes 3.1 is multiple, the axis of the limit column 3.2 is parallel to the length direction of the stator coil frame 1, the top surface of the limit column 3.2 protrudes from the top surface of the circuit board 2, and the plug interface 4.1 is a long strip opening that penetrates the limit column 3.2;

[0034] In actual use, the reserved hole 3.1 on the circuit board 2 is correspondingly plugged with the limiting column 3.2, so that the position of the circuit board 2 in the horizontal direction of the top of the stator coil frame 1 is determined, and then the blocking unit 4.2 is extended into the plug interface 4.1, the top surface of the blocking unit 4.2 contacts the inner top of the plug interface 4.1, and the bottom surface of the blocking unit 4.2 contacts the circuit board 2. At this time, the circuit board 2 cannot move along the axial direction of the limiting column 3.2, and the circuit board 2 is limited to the blocking unit 4.2 and the stator coil frame 1. The circuit board 2 is locked on the stator coil frame 1. At this time, the positioning component in the locking mechanism can ensure that the Hall sensor and the stator component are at a preset position angle, thereby improving the accuracy of the Hall sensor sensing magnetic pole. The stator coil frame and the circuit board of the Hall sensor are fixedly connected through the pin locking component, which also improves the integration of the brushless motor. During assembly, the fixed stator coil can be directly installed into the motor casing to complete a stator component. The structure is simple and easy to assemble, which is beneficial to the overall assembly efficiency of the product.

[0035] In another embodiment provided by the present invention, the stator coil frame 1 includes a connecting ring sleeve 1.1, and winding shaft blocks 1.2 are evenly distributed and fixed on the inner wall surface of the connecting ring sleeve 1.1. The winding shaft blocks 1.2 are used to wind metal wires. The end surface of the winding shaft blocks 1.2 and the connecting ring sleeve 1.1 constitute the top surface of the stator coil frame 1. The top surface is a plane perpendicular to the axis of the connecting ring sleeve 1.1. An elastic isolation member 5 is fixed on the top surface of the stator coil frame 1. The elastic isolation member 5 includes an elastic insulating pad 5.1. The elastic insulating pad 5.1 is provided with a through hole 5.2 for the limit column 3.2 to pass through. The elastic insulating pad 5.1 is preferably an elastic rubber pad;

[0036] The blocking unit 4.2 includes a socket unit 4.21, which is slidably connected to the circuit board 2 through a sliding mechanism 4.22. The sliding mechanism 4.22 can be a slide groove 4.221 provided on the top surface of the circuit board 2. The socket unit 4.21 can slide in the length direction of the slide groove 4.221. The length direction line of the slide groove 4.221 runs through the plug interface 4.1. Furthermore, a recessed groove 4.22 is provided on the side wall of the slide groove 4.221. 2, a slider 4.223 fixed to the socket unit 4.21 is slidably engaged in the recessed groove 4.222, and the socket unit 4.21 has a plug position extending into the plug interface 4.1 and a evasion position detached from the plug interface 4.1 on the circuit board 2. When the socket unit 4.21 is in the plug position, the circuit board 2 is in a locked state on the stator coil frame 1; when the socket unit 4.21 is in the evasion position, the circuit board 2 is in an unlocked state on the stator coil frame 1.

[0037] In another embodiment of the present invention, a plug unit 4.23 is adapted to be plugged into the socket unit 4.21, and the plug unit 4.23 can be electrically plugged into the socket unit 4.21 in the plug position, and a through hole 3.3 is provided on the top of the limiting column 3.2 for the socket unit 4.21 to be inserted;

[0038] The socket unit 4.21 includes a frame box 4.211, which can move in the slide slot 4.221 along the length direction line of the slide slot 4.221. A conductive sheet 4.212 is fixed in the frame box 4.211. The conductive sheet 4.212 is electrically connected to the circuit board 2 through a conductive wire 4.213. The length value of the conductive wire 4.213 is much larger than the displacement value of the frame box 4.211 on the circuit board 2. When the frame box 4.211 is inserted into the plug interface 4.1, the circuit board 2 is in a locked state on the stator coil frame 1. At the same time, one end of the slide slot 4.221 contacts the outer end surface of the frame box 4.211, so that the frame box 4.211 can stop moving in the plug position. When the frame box 4.211 is completely separated from the plug interface 4.1, the circuit board 2 is in an unlocked state on the stator coil frame 1.

[0039] It should be further explained that the plug unit 4.23 includes a plug shell 4.231, one end of which is hingedly connected to a conductive member 4.232. In addition, a first slide groove unit 6 is provided on the outer side of the frame box 4.211, and a second slide groove unit 7 is provided on the inner wall of the plug interface 4.1. When the socket unit 4.21 is in the plug position, the first slide groove unit 6 is aligned with the second slide groove unit 7 to form a sliding channel for the conductive member 4.232 to pass through.

[0040] Specifically, the first slide groove unit 6 includes a first vertical groove 6.1, the top of the first vertical groove 6.1 is connected and flush with the top surface of the frame box 4.211, and the bottom end surface of the first vertical groove 6.1 is fixed with a conductive plate 6.2 electrically connected to the conductive sheet 4.212. The positive projection area of ​​the first slide groove unit 6 on the inner wall surface of the plug interface 4.1 is the coverage area of ​​the first slide groove unit 6, and the second slide groove unit 7 is located in the coverage area;

[0041] The second slideway groove unit 7 includes an insertion slide groove 7.1 parallel to the first vertical groove 6.1, and a withdrawal slide groove 7.2 is provided on one side of the insertion slide groove 7.1 in parallel. The bottom end of the insertion slide groove 7.1 is connected to the bottom end of the withdrawal slide groove 7.2 through a wavy groove structure 7.3. The wavy groove structure 7.3 includes a first inclined groove 7.31 and a second inclined groove 7.32. The second inclined groove 7.32 is vertically connected to the side end of the first inclined groove 7.31. A V-shaped structure with an opening direction toward the frame box 4.211 is formed between the second inclined groove 7.32 and the first inclined groove 7.31. The bottom end of the first inclined groove 7.31 constitutes the groove bottom end of the insertion slide groove 7.1, and the groove side wall of the withdrawal slide groove 7.2 constitutes the groove bottom end of the second inclined groove 7.32.

[0042] The angle between the first inclined groove 7.31 and the insertion groove 7.1 is 45 degrees, the angle between the second inclined groove 7.32 and the withdrawal groove 7.2 is 45 degrees, the groove width value of the insertion groove 7.1 is less than the groove width value of the withdrawal groove 7.2 is less than the groove width value of the first inclined groove 7.31 is less than the groove width value of the second inclined groove 7.32;

[0043] The conductive member 4.232 is a conductive rod 4.2321 that can move in the first slideway slot unit 6, and a protruding block 4.2322 that can move in the second slideway slot unit 7 is fixed to the bottom side of the conductive rod 4.2321;

[0044] In actual use, when the socket unit 4.21 is located at the plug position, the plug shell 4.231 is inserted into the through hole 3.3. At the same time, the conductive member 4.232 is also inserted into the sliding channel formed by aligning the first slide groove unit 6 and the second slide groove unit 7. During the insertion process, the conductive rod 4.2321 is located in the first vertical groove 6.1, and the bottom end of the conductive rod 4.2321 contacts the conductive plate 6.2. As the insertion depth of the conductive rod 4.2321 deepens, the conductive rod 4.2321 applies an extrusion force to the conductive plate 6.2, so that the frame box 4.211 produces elastic extrusion deformation on the elastic insulating pad 5.1. During this process, the protruding block 4.2322 fixed on the side of the bottom end of the conductive rod 4.2321 moves along the insertion slide groove 7.1;

[0045] When the protruding block 4.2322 reaches the bottom end of the insertion slide groove 7.1, the conductive rod 4.2321 also reaches the maximum insertion depth. At this time, the insertion force on the conductive rod 4.2321 is cancelled, and the conductive rod 4.2321 moves upward to separate from the first slide groove unit 6 under the elastic restoring force of the elastic insulating pad 5.1. However, since the bottom end of the first inclined groove 7.31 constitutes the bottom end of the insertion slide groove 7.1, the protruding block 4.2322 moves along the first inclined groove 7.31. 31, when the protruding block 4.2322 slides to the position where the first inclined groove 7.31 and the second inclined groove 7.32 are connected, the protruding block 4.2322 is in a clamped state, and the conductive rod 4.2321 cannot continue to move upward to separate from the first slideway groove unit 6. At this time, the plug unit 4.23 is electrically connected to the socket unit 4.21 in the plug position, and the plug unit 4.23 also limits the frame box 4.211 in the plug position;

[0046] When it is necessary to cut off the electrical connection, the insertion force is applied to the conductive rod 4.2321 again, and the protruding block 4.2322 slides from the first inclined groove 7.31 into the second inclined groove 7.32, and then slides into the withdrawal groove 7.2 along the groove diameter of the second inclined groove 7.32. When the protruding block 4.2322 reaches the end of the withdrawal groove 7.2, the insertion force on the conductive rod 4.2321 is cancelled, and a force for pulling out the conductive rod 4.2321 is applied, and the protruding block 4.2322 also disengages outwardly along the withdrawal groove 7.2 until the protruding block 4.2322 disengages from the through-hole 3.3 along the plug shell 4.231. At this time, the limit of the plug unit 4.23 on the frame box 4.211 in the plug position is released.

[0047] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mounting structure for a brushless motor Hall sensor, comprising a stator coil frame (1) and a circuit board (2) of the Hall sensor, characterized in that: The stator coil frame (1) and the circuit board (2) are connected via a locking mechanism, wherein the locking mechanism comprises: A positioning assembly (3), comprising a reserved hole (3.1) formed on the circuit board (2), wherein a limiting column (3.2) fixed to the top surface of the stator coil frame (1) is adapted to be inserted into the reserved hole (3.1); A pin lock assembly (4), comprising an insertion port (4.1) provided on a side of a limiting column (3.2), a blocking unit (4.2) being movably mounted on the circuit board (2), the blocking unit (4.2) extending into the insertion port (4.1), and the circuit board (2) being in a locked state on the stator coil frame (1); The stator coil frame (1) comprises a connecting ring sleeve (1.1), winding shaft blocks (1.2) are evenly distributed and fixed on the inner wall surface of the connecting ring sleeve (1.1), the winding shaft blocks (1.2) and the end surfaces of the connecting ring sleeve (1.1) constitute the top surface of the stator coil frame (1), an elastic isolating member (5) is fixed on the top surface of the stator coil frame (1), the elastic isolating member (5) comprises an elastic insulating pad (5.1), and a through hole (5.2) for a limit column (3.2) to pass through is opened on the elastic insulating pad (5.1); The blocking unit (4.2) comprises a socket unit (4.21), the socket unit (4.21) is slidably connected to the circuit board (2) via a sliding mechanism (4.22), the socket unit (4.21) has a plug position extending into the plug interface (4.1) and an escape position detached from the plug interface (4.1), the socket unit (4.21) is adapted to be plugged with a plug unit (4.23), the plug unit (4.23) can form an electrical plug connection with the socket unit (4.21) in the plug position, and a through hole (3.3) for the socket unit (4.21) to be inserted is provided at the top of the limiting column (3.2).

2. The installation structure of a brushless motor Hall sensor according to claim 1, characterized in that: The socket unit (4.21) comprises a frame box (4.211), a conductive sheet (4.212) is fixed inside the frame box (4.211), and the conductive sheet (4.212) is electrically connected to the circuit board (2) via a conductive wire (4.213).

3. The installation structure of a brushless motor Hall sensor according to claim 2, characterized in that: The plug unit (4.23) comprises a plug shell (4.231), and a conductive member (4.232) is hingedly connected to one end of the plug shell (4.231).

4. The installation structure of a brushless motor Hall sensor according to claim 3, characterized in that: The outer side surface of the frame box (4.211) is provided with a first slide groove unit (6), and the inner wall surface of the plug interface (4.1) is provided with a second slide groove unit (7). When the socket unit (4.21) is in the plug position, the first slide groove unit (6) and the second slide groove unit (7) are aligned to form a sliding channel for the conductive member (4.232) to pass through.

5. The installation structure of a brushless motor Hall sensor according to claim 4, characterized in that: The conductive member (4.232) is a conductive rod (4.2321) that can move in the first slideway groove unit (6), and a protruding block (4.2322) that can move in the second slideway groove unit (7) is fixed to the bottom side of the conductive rod (4.2321).

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