Motor position sensor

Abstract

The utility model discloses a motor position sensor, which relates to the field of vehicle sensors and comprises a shell, a circuit board and a cover plate, the circuit board is mounted on the shell, and the cover plate is mounted on the shell and covers the circuit board; the shell, the circuit board and the cover plate are all of an arc-shaped structure. According to the motor position sensor, the housing, the circuit board and the cover plate are all arc-shaped structures, and compared with a circular ring / full circle structure, the size is smaller, so that the space utilization rate of a production mold can be improved, the production efficiency of the mold can be improved, and the production, transportation and assembly costs can be reduced. Moreover, the size of the sensor is reduced, and when the sensor is installed on a large-size motor shaft, the problem of installation stability caused by the large adaptive size of a product can be reduced, so that the installation stability is improved.

Description

Technical Field

[0001] The utility model relates to the field of vehicle sensors, in particular to a motor position sensor. Background Art

[0002] Motor position sensors are mainly used in automotive drive systems and are used in brake and transmission systems. Motor position sensors are installed on motors to monitor and provide feedback on the rotation angle and position of the motor shaft.

[0003] like Figure 1 and Figure 2 As shown, there is a motor position sensor with a circular through-hole structure in the prior art, which includes a cover plate 1', a circuit board 2' and a housing 3'. Since the cover plate 1', the circuit board 2' and the housing 3' are all circular ring structures, when the motor shaft size to be assembled is large, the overall volume of the sensor will also increase accordingly, resulting in low space utilization of the production mold and high production, transportation and assembly costs; at the same time, the increase in the size of the sensor will also cause a decrease in installation stability, thereby affecting its measurement accuracy.

[0004] In view of this, the present invention aims at the many deficiencies and inconveniences caused by the imperfect design of the above-mentioned sensor structure, and has been deeply conceived, actively studied, improved and tried to develop and design the present invention. Utility Model Content

[0005] The utility model aims to provide a motor position sensor, which improves production efficiency, reduces costs and has good installation stability.

[0006] In order to achieve the above purpose, the solution of the utility model is:

[0007] A motor position sensor comprises a housing, a circuit board and a cover plate, wherein the circuit board is mounted on the housing, and the cover plate is mounted on the housing and covers the circuit board;

[0008] The housing, circuit board and cover plate are all arc-shaped structures.

[0009] Furthermore, the housing, circuit board and cover plate are all semicircular arc structures.

[0010] Furthermore, the housing is provided with a pin header slot corresponding to the circuit board, and the circuit board is mounted on the housing by crimping.

[0011] Furthermore, it also includes a sealing material, which is filled in the needle row groove.

[0012] Furthermore, the sealing material is silicone gel.

[0013] Furthermore, the shell and the cover plate are welded together by laser.

[0014] Furthermore, a plurality of ear seats are provided on the peripheral side of the shell, and the ear seats are provided with connecting holes.

[0015] Furthermore, a bushing is fixed in the connecting hole.

[0016] Furthermore, the shell is made of thermoplastic material.

[0017] Furthermore, the cover plate is made of thermoplastic material.

[0018] After adopting the above scheme, the shell, circuit board and cover plate of the motor position sensor of the utility model are all arc-shaped structures, which are smaller in size than the circular ring / full circle structure. Therefore, it can improve the space utilization of the production mold, improve the mold production efficiency, and reduce the production, transportation and assembly costs.

[0019] Furthermore, reducing the size of the sensor can reduce installation stability issues caused by the large product adaptation size when the sensor is installed on a large-sized motor shaft, thereby improving installation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the prior art;

[0022] Figure 2 It is a structural decomposition diagram of the prior art;

[0023] Figure 3 This is a schematic diagram of the structure of a preferred embodiment of the utility model;

[0024] Figure 4 This is a structural exploded view of a preferred embodiment of the utility model;

[0025] Figure 5 It is a schematic diagram of the structure of the shell in a preferred embodiment of the utility model.

[0026] In the figure: 1. shell; 11. pin slot; 12. ear seat; 121. connecting hole; 2. circuit board; 3. cover plate; 4. sealing material; 5. bushing. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] like Figures 3 to 5 As shown, a preferred embodiment of a motor position sensor of the utility model includes a housing 1, a circuit board 2 and a cover plate 3, wherein the circuit board 2 is mounted on the housing 1, and the cover plate 3 is mounted on the housing 1 and covers the circuit board 2; the housing 1, the circuit board 2 and the cover plate 3 are all arc-shaped structures.

[0030] In this embodiment, the shapes of the housing 1, the circuit board 2 and the cover plate 3 match each other, the circuit board 2 is fixed to the housing 1 by crimping, and the housing 1 and the cover plate 3 are assembled together by laser welding.

[0031] Since the measuring range of the sensor has certain minimum stroke requirements, in order to obtain greater advantages and higher cost-effectiveness, the sensor provided by the utility model is mainly used in application scenarios where the motor shaft diameter is greater than 90 mm.

[0032] Specifically, the housing 1, the circuit board 2 and the cover plate 3 are arc structures with a central angle between 90° and 180°, and the area of ​​the corresponding part of the sensor arc structure can be reduced to between one quarter and one half of the circular structure with the same diameter, and a certain measurement range is compensated by software, and the measurement accuracy is ensured through comprehensive adjustment of software and hardware. The housing 1, the circuit board 2 and the cover plate 3 in this embodiment are all semicircular arc structures.

[0033] The focus of the utility model is that the housing 1, circuit board 2 and cover plate 3 of the motor position sensor of the utility model are all arc-shaped structures, which are smaller in size than the circular ring / full circle structure, so it can improve the space utilization of the production mold, improve the mold production efficiency, and reduce the production, transportation and assembly costs.

[0034] Furthermore, reducing the size of the sensor can reduce installation stability issues caused by the large product adaptation size when the sensor is installed on a large-sized motor shaft, thereby improving installation stability.

[0035] In this embodiment, the housing 1 is further provided with a pin header slot 11 corresponding to the circuit board 2 for accommodating the pin header and installing the circuit board 2 .

[0036] The pin slot 11 is filled with sealing material 4. In this embodiment, silicone gel (SiGel612) is used as the sealing material 4, and the silicone gel is filled in the pin slot 11 to improve the stability of the pin installation and prevent external oil from flowing into the circuit board 2 along the pin, so that the sensor has better sealing performance.

[0037] In order to facilitate the installation of the housing 1 at a fixed position, a plurality of ear seats 12 are provided on the periphery of the housing 1, and the ear seats 12 are provided with connecting holes 121. In order to increase the structural strength of the ear seats 12 and prevent cracking, a bushing 5 is fixed in the connecting hole 121.

[0038] The shell 1 and the cover plate 3 are both made of thermoplastic material. In this embodiment, the shell 1 is made of nylon material, and the cover plate 3 is made of nylon material.

[0039] During operation of the motor position sensor, the induction coil on the circuit board 2 senses the rotation of the fan blades on the motor shaft to determine the current position of the motor shaft, and then transmits the signal to the vehicle control system to realize the detection and feedback of the motor position.

[0040] This specification uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A motor position sensor, characterized in that: It comprises a housing, a circuit board and a cover plate, wherein the circuit board is mounted on the housing, and the cover plate is mounted on the housing and covers the circuit board; The housing, circuit board and cover plate are all arc-shaped structures.

2. A motor position sensor according to claim 1, characterized in that: The housing, circuit board and cover plate are all semicircular arc structures.

3. A motor position sensor according to claim 1, characterized in that: The shell is provided with a pin row slot corresponding to the circuit board, and the circuit board is mounted on the shell by crimping.

4. A motor position sensor according to claim 3, characterized in that: It also includes a sealing material, which is filled in the pin row groove.

5. A motor position sensor according to claim 4, characterized in that: The sealing material is silicone gel.

6. A motor position sensor according to claim 1, characterized in that: The housing and the cover are welded together by laser.

7. A motor position sensor according to claim 1, characterized in that: A plurality of ear seats are arranged on the peripheral side of the shell, and the ear seats are provided with connecting holes.

8. A motor position sensor according to claim 7, characterized in that: A bushing is fixed in the connecting hole.

9. The motor position sensor according to claim 1, characterized in that: The shell is made of thermoplastic material.

10. The motor position sensor according to claim 1, characterized in that: The cover plate is made of thermoplastic material.

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