A sealed and anti-disassembly structure of a steering motor

Abstract

The utility model discloses a sealed anti -disassembly structure of steering motor, wherein, motor assembly and motor cover are sealedly connected through sealing adhesive, and the motor cover is provided with a connector window, a flexible circuit board assembly, a filter circuit board assembly and a signal connector assembly are respectively fixed on the circuit board base and are arranged in the cavity between the motor cover and the motor assembly, and the circuit connector or PIN pin terminal is connected through the connector window, the circuit connector and the motor cover are interference -fit and are sealedly fixed through sealing adhesive, and the PIN pin terminal and the motor cover are sealedly fixed through sealing adhesive. Through the technical scheme of the utility model, the sealing requirement of the motor is achieved, the buckle design in the traditional connection mode is cancelled, the manufacturing cost caused by machining is cancelled, the anti -vibration ability is improved, and the sealing fixing mode of each circuit connector relative to the motor cover improves the anti -fake and anti -disassembly effect.

Description

Technical Field

[0001] This utility model relates to the field of motor housing technology, and in particular to a sealed and tamper-proof structure for a steering motor. Background Technology

[0002] Currently, the placement of the steering motor is undergoing significant changes in the development of electric power steering systems. To improve cabin quietness, more and more models are moving the motor from the cabin to the chassis area. This change exposes the motor to harsh environments such as rain splashes and gravel impacts, requiring a jump in protection levels from basic dustproof to fully sealed waterproof.

[0003] The current industry standard employs a metal casing paired with plastic clips: protection is achieved by the clips engaging and tightening a sealing ring. However, this design faces several challenges in practical applications:

[0004] (1) Structural reliability issues: Continuous vehicle vibration causes fatigue and loosening of the plastic clips, and the compression of the sealing ring gradually decreases, which will lead to seal failure after long-term use.

[0005] (2) Manufacturing cost pressure: The snap-fit ​​structure requires the shell to have a precision mounting groove, which increases the complexity of the mold, and the sealing surface needs to be machined to ensure flatness.

[0006] (3) Maintenance dilemma: After-sales repair requires breaking the snap-fit ​​structure to open the shell, and the repaired parts may be forced to be replaced as a whole due to shell damage.

[0007] To address the need for anti-counterfeiting and anti-tampering, traditional solutions rely on physical anti-tampering methods such as special bolts. However, professional tools can still disassemble the motor control unit without damage, leading to the risk of leakage of core technologies.

[0008] Although improved solutions such as welding and sealing have emerged in recent years, the high-temperature welding process can easily damage internal electronic components, and the shell still needs to be cut during maintenance. It is impossible to build a long-term sealing barrier in a dynamic vibration environment while taking into account production costs and intellectual property protection. Utility Model Content

[0009] To address the aforementioned issues, this utility model provides a sealed and tamper-proof structure for a steering motor. The sealing requirements of the motor are achieved through the structural fit and sealed connection between the motor assembly and the motor cover. This eliminates the snap-fit ​​design in traditional connection methods, reduces manufacturing costs caused by machining, and improves vibration resistance through adhesive bonding. At the same time, the sealed fixing method of each circuit connector relative to the motor cover enhances the anti-counterfeiting and anti-tampering effects.

[0010] To achieve the above objectives, this utility model provides a sealed and tamper-proof structure for a steering motor, comprising: a motor assembly, a motor cover, a flexible circuit board assembly, a filter circuit board assembly, a signal connector assembly, and a circuit board base.

[0011] The motor assembly and the motor cover are sealed together by a sealing adhesive, and the motor cover is provided with a connector window;

[0012] The flexible circuit board assembly, the filter circuit board assembly, and the signal connector assembly are respectively fixed on the circuit board base and disposed in the cavity between the motor cover and the motor assembly;

[0013] The circuit connectors or pin terminals of the flexible circuit board assembly, the filter circuit board assembly, and the signal connector assembly are output and connected through the connector window. The circuit connectors are interference-fitted with the motor cover and sealed and fixed with sealing adhesive. The pin terminals are sealed and fixed with the motor cover with sealing adhesive.

[0014] In the above technical solution, preferably, the inner end of the circuit connector is fixedly connected to the motor assembly through an internal bolt structure, and the outer end passes through the connector window in an interference fit manner and is sealed and fixed by a sealing adhesive.

[0015] In the above technical solution, preferably, the flexible circuit board assembly includes a signal circuit board, a drive circuit board, and a flexible circuit board. The signal circuit board and the drive circuit board are respectively connected to both sides of the flexible circuit board. A bridge connector is connected to the drive circuit board through a fisheye pin terminal. The drive circuit board is connected to the motor assembly by bolts. The signal circuit board is connected to the circuit board base by bolts.

[0016] In the above technical solution, preferably, a support column is provided on the inner side of the motor assembly, and the circuit board base is connected to the support column by bolts.

[0017] In the above technical solution, preferably, the filter circuit board assembly and the signal connection assembly are connected to the circuit board base by bolts.

[0018] In the above technical solution, preferably, a vent hole is provided on the rear side of the motor cover, a vent plug is provided in the vent hole, a sealing ring is provided on the edge of the vent plug, the vent plug is connected to the vent hole by a snap-fit ​​structure, and is sealed to the vent hole by the sealing ring.

[0019] In the above technical solution, preferably, the filter circuit board assembly includes a filter circuit board, a power connector, and a power adapter. The power connector and the filter circuit board are connected by welding. The power connector is interference-fitted with the connector window and passes through the motor cover. The power adapter and the bridge connector of the flexible circuit board assembly are connected by welding. The filter circuit board is connected to the signal circuit board through the power adapter.

[0020] In the above technical solution, preferably, the signal connector assembly is connected to the signal circuit board via an interference fit through a fisheye pin at the lower end of the internal metal terminal.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: the sealing requirements of the motor are achieved through the structural cooperation and sealing connection between the motor assembly and the motor cover, eliminating the buckle design in the traditional connection method, eliminating the manufacturing cost caused by machining, and the adhesive method improves the vibration resistance. At the same time, the sealing and fixing method of each circuit connector relative to the motor cover improves the anti-counterfeiting and anti-tampering effect. Attached Figure Description

[0022] Figure 1 This is an exploded view of a sealing and tamper-proof structure for a steering motor disclosed in one embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the end face structure of a motor cover according to an embodiment of the present utility model;

[0024] Figure 3 This is a cross-sectional view of the connection structure between the motor assembly and the motor cover in one embodiment of the present utility model;

[0025] Figure 4 This is a cross-sectional view of the connection structure between the motor cover and the PIN terminal disclosed in one embodiment of the present invention;

[0026] Figure 5 This is a cross-sectional view of the connection structure between the motor cover and the PIN terminal disclosed in one embodiment of the present invention;

[0027] Figure 6 This is a cross-sectional view of the connection structure between the motor cover and the metal terminal in one embodiment of the present invention.

[0028] In the diagram, the correspondence between the components and the reference numerals is as follows:

[0029] 1. Motor assembly; 2. Sealing adhesive; 3. Flexible circuit board assembly; 3-1. Signal circuit board; 3-2. Drive circuit board; 3-3. Flexible circuit board; 4. Bolt; 5. Circuit board base; 6. Filter circuit board assembly; 6-1. Power connector; 7. Signal connector assembly; 7-1. PIN terminal; 8. Motor cover; 8-1, 8-2, 8-3. Connector window; 9. Vent plug. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] The present invention will now be described in further detail with reference to the accompanying drawings:

[0032] like Figures 1 to 3 As shown, a sealing and tamper-proof structure for a steering motor according to the present invention includes: a motor assembly 1, a motor cover 8, a flexible circuit board assembly 3, a filter circuit board assembly 6, a signal connector assembly 7, and a circuit board base 5.

[0033] The motor assembly 1 and the motor cover 8 are sealed and connected by a sealing adhesive 2. The motor cover 8 is provided with connector windows 8-1 (8-2, 8-3).

[0034] The flexible circuit board assembly 3, the filter circuit board assembly 6, and the signal connector assembly 7 are respectively fixed on the circuit board base 5 and disposed in the cavity between the motor cover 8 and the motor assembly 1.

[0035] The circuit connectors or pin terminals 7-1 of the flexible circuit board assembly 3, the filter circuit board assembly 6 and the signal connector assembly 7 are output and connected through the connector windows 8-1 (8-2, 8-3). The circuit connectors are interference-fitted with the motor cover 8 and sealed and fixed by the sealing adhesive 2. The pin terminals 7-1 are sealed and fixed with the motor cover 8 by the sealing adhesive 2.

[0036] In this embodiment, the sealing requirements of the motor are achieved through the structural fit and sealing connection between the motor assembly 1 and the motor cover 8. The snap-on design in the traditional connection method is eliminated, and the manufacturing cost caused by machining is eliminated. From the perspective of reducing the cost of parts processing and production assembly and debugging, multiple product functions are realized, thereby achieving the goal of cost reduction. The adhesive method improves the vibration resistance, and the sealing and fixing method of each circuit connector relative to the motor cover 8 improves the anti-counterfeiting and anti-tampering effect.

[0037] Specifically, the motor cover 8 and the motor assembly 1 are sealed using a potting process, eliminating the need for snap-fit ​​installation between them and removing the snap-fit ​​design of the mold, thus eliminating the need for machining the snap-fit ​​end face of the housing. The motor cover 8 and the circuit connector are sealed using structural fit and sealing adhesive 2, thereby meeting the sealing requirements of the steering motor. The structural fit and the strong adhesive strength provide excellent vibration resistance.

[0038] like Figure 4 and Figure 5 As shown, the PIN pin terminal 7-1 is further bonded to the motor cover 8 with a high-adhesion adhesive. When the motor cover 8 is forcibly disassembled, the PIN pin will deform or even break, thereby achieving the effect of anti-counterfeiting and anti-tampering.

[0039] In the above embodiment, preferably, the inner end of the circuit connector is fixedly connected to the motor assembly 1 by an internal bolt structure, and the outer end passes through the connector window 8-1 (8-2, 8-3) by an interference fit and is sealed and fixed by a sealing adhesive 2, thereby achieving the requirements of circuit connection and sealing of the motor.

[0040] In the above embodiments, preferably, the flexible circuit board assembly 3 includes a signal circuit board 3-1, a drive circuit board 3-2, and a flexible circuit board 3-3. The signal circuit board 3-1 and the drive circuit board 3-2 are respectively connected to both sides of the flexible circuit board 3-3. A bridge connector is connected to the drive circuit board 3-2 through a fisheye pin terminal. The drive circuit board 3-2 is connected to the motor assembly 1 through a bolt 4. The signal circuit board 3-1 is connected to the circuit board base 5 through a bolt 4.

[0041] In the above embodiments, preferably, a support column is provided on the inner side of the motor assembly 1, and the circuit board base 5 is connected to the support column by bolts 4 to realize the fixed connection between the circuit board base 5 and the motor assembly 1.

[0042] In the above embodiment, preferably, the filter circuit board assembly 6 and the signal connection assembly are connected to the circuit board base 5 by bolts 4.

[0043] In the above embodiment, preferably, a vent hole is provided on the rear side of the motor cover 8, a vent plug 9 is provided in the vent hole, a sealing ring is provided on the edge of the vent plug 9, the vent plug 9 is connected to the vent hole by a snap-fit ​​structure, and is sealed with the vent hole by the sealing ring, so as not to affect the ventilation, and to achieve the sealing effect of dustproof and waterproof.

[0044] like Figure 6 As shown, in the above embodiment, preferably, the filter circuit board assembly 6 includes a filter circuit board, a power connector 6-1 and a power adapter. The power connector 6-1 and the filter circuit board are connected by soldering. The power adapter and the bridge connector of the flexible circuit board 3-3 assembly 3 are connected by soldering. The filter circuit board is connected to the signal circuit board 3-1 through the power adapter.

[0045] In the above embodiment, preferably, the signal connector assembly 7 is connected to the signal circuit board 3-1 by an interference fit through a fisheye pin at the lower end of the internal metal terminal.

[0046] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sealed and tamper-proof structure for a steering motor, characterized in that, include: Motor assembly, motor cover, flexible circuit board assembly, filter circuit board assembly, signal connector assembly, and circuit board base; The motor assembly and the motor cover are sealed together by a sealing adhesive, and the motor cover is provided with a connector window; The flexible circuit board assembly, the filter circuit board assembly, and the signal connector assembly are respectively fixed on the circuit board base and disposed in the cavity between the motor cover and the motor assembly; The circuit connectors or pin terminals of the flexible circuit board assembly, the filter circuit board assembly, and the signal connector assembly are output and connected through the connector window. The circuit connectors are interference-fitted with the motor cover and sealed and fixed with sealing adhesive. The pin terminals are sealed and fixed with the motor cover with sealing adhesive.

2. The sealing and tamper-proof structure of the steering motor according to claim 1, characterized in that, The inner end of the circuit connector is fixedly connected to the motor assembly by an internal bolt structure, and the outer end passes through the connector window with an interference fit and is sealed and fixed by a sealing adhesive.

3. The sealing and tamper-proof structure for the steering motor according to claim 1, characterized in that, The flexible circuit board assembly includes a signal circuit board, a drive circuit board, and a flexible circuit board. The signal circuit board and the drive circuit board are respectively connected to both sides of the flexible circuit board. A bridge connector is connected to the drive circuit board through a fisheye pin terminal. The drive circuit board is connected to the motor assembly by bolts, and the signal circuit board is connected to the circuit board base by bolts.

4. The sealing and tamper-proof structure of the steering motor according to claim 1, characterized in that, The motor assembly has a support column on its inner side, and the circuit board base is connected to the support column by bolts.

5. The sealing and tamper-proof structure of the steering motor according to claim 1, characterized in that, The filter circuit board assembly and the signal connection assembly are connected to the circuit board base by bolts.

6. The sealing and tamper-proof structure for the steering motor according to claim 1, characterized in that, A vent hole is provided on the rear side of the motor cover, a vent plug is provided in the vent hole, a sealing ring is provided on the edge of the vent plug, the vent plug is connected to the vent hole by a snap-fit ​​structure, and is sealed to the vent hole by the sealing ring.

7. The sealing and tamper-proof structure for the steering motor according to claim 3, characterized in that, The filter circuit board assembly includes a filter circuit board, a power connector, and a power adapter. The power connector and the filter circuit board are connected by soldering. The power connector is interference-fitted with the connector window and passes through the motor cover. The power adapter and the bridge connector of the flexible circuit board assembly are connected by soldering. The filter circuit board is connected to the signal circuit board through the power adapter.

8. The sealing and tamper-proof structure for the steering motor according to claim 3, characterized in that, The signal connector assembly is connected to the signal circuit board via an interference fit through a fisheye pin at the lower end of the internal metal terminal.

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