Heat dissipation mechanism of automobile PWM speed regulation module

Abstract

The utility model relates to the technical field of automobile parts, in particular to a heat dissipation mechanism of an automobile PWM (Pulse Width Modulation) speed regulation module, which comprises a support, a connecting mechanism, a radiator and a PCB (Printed Circuit Board), the PCB is fixed on the support through the connecting mechanism, the support is provided with a through hole, and the PCB is partially overlapped with the through hole; the bottom surface of the support is provided with an annular groove allowing the radiator to be vertically inserted in a sliding mode, and the annular groove is located around the through hole. The connecting mechanism comprises a groove formed in the surface of the radiator; one end of the through hole communicates with the side face of the support, and the other end communicates with the inner wall of the annular groove; the inner end of the through hole is arc-shaped; the adjusting plate slides in the through hole in the axis direction of the through hole; an elastic piece is arranged on the inner side of the adjusting plate; the ball body is located in the through hole; the two ends of the elastic piece abut against the adjusting plate and the ball respectively. The radiator is simple in structure, the fixing structure of the radiator is improved, the radiator is convenient to disassemble and assemble, and the effects of facilitating maintenance and reducing cost are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a heat dissipation mechanism of an automobile PWM speed regulation module. Background Art

[0002] With the advancement of automotive electronics, especially the widespread adoption of electric drive systems in electric and hybrid vehicles, the demand for efficient and reliable power conversion and control equipment is growing. Pulse Width Modulation (PWM) speed control modules, as key components in motor control systems, have a direct impact on the vehicle's power output efficiency and reliability. However, during actual operation, PWM speed control modules generate significant heat due to their frequent switching operations. If this heat is not effectively managed, it will cause the module to overheat, affecting its operating efficiency and even causing damage.

[0003] At present, the common PWM speed control module heat dissipation solutions on the market are mainly divided into two categories: one-piece injection-molded heat sinks and split heat dissipation structures fixed with rivets.

[0004] The design of an integrated injection-molded heat sink usually integrates the heat sink directly into the housing of the PWM speed control module and realizes integrated manufacturing through the injection molding process. The advantages of this method are compact structure, low cost and beautiful appearance, but the disadvantages are also very obvious. That is, once a fault occurs and maintenance is required, the entire module including the heat dissipation part needs to be replaced, which increases maintenance costs; for the heat sink fixed by rivets, in order to remove the rivets, special tools such as drills, punches or special rivet removal tools are usually required. These tools may not be fully equipped at all maintenance points, which increases the difficulty of maintenance. Utility Model Content

[0005] To solve the above technical problems, the utility model provides a heat dissipation mechanism for an automobile PWM speed regulation module, which has a simple structure, improves the fixing structure of the radiator, facilitates the disassembly and assembly of the radiator, and plays a role in facilitating maintenance and reducing costs.

[0006] The heat dissipation mechanism of the automobile PWM speed regulation module of the utility model includes a support, a connecting mechanism, a radiator and a PCB board. The PCB board is fixed to the support by the connecting mechanism. The support has a through hole, and the PCB board and the through hole partially overlap. The bottom surface of the support is provided with an annular groove for vertically sliding insertion of the radiator, and the annular groove is located around the through hole.

[0007] The connection mechanism includes:

[0008] A groove is provided on the surface of the radiator;

[0009] A through hole, one end of which is connected to the side surface of the support and the other end of which is connected to the inner wall of the annular groove; the inner end of the through hole is set to be an arc shape;

[0010] The adjusting plate slides in the through hole along the axis direction of the through hole; an elastic member is provided on the inner side of the adjusting plate;

[0011] The sphere is located in the through hole; two ends of the elastic member are respectively in contact with the adjustment plate and the sphere;

[0012] When the radiator is fixed to the support, the through hole faces the groove, and under the elastic force of the elastic member, part of the sphere passes through the inner end of the through hole and extends into the groove;

[0013] The connection mechanism also includes:

[0014] The adjusting mechanism is arranged at the through hole and is used for adjusting the position of the adjusting plate.

[0015] As a preferred solution of the present invention, a connecting mechanism is provided on at least one side surface of the support.

[0016] As a preferred solution of the present invention, the adjustment mechanism includes:

[0017] The bearing seat is fixed inside the through hole;

[0018] A screw rod is rotatably connected to the bearing seat;

[0019] The thread groove is provided on the adjusting plate; the screw rod is threadably connected to the thread groove.

[0020] As a preferred solution of the present invention, at least two connecting mechanisms are provided on the same side of the support.

[0021] As a preferred solution of the present invention, the screw rod is sleeved with a sprocket, and two adjacent sprockets located on the same side are sleeved with chains.

[0022] As a preferred solution of the present invention, a notch is provided on the side of the support provided with the connecting mechanism;

[0023] A protective cover is provided at the notch; at least one end of a screw rod extends out of the protective cover; and an operating piece is provided at the end of the screw rod.

[0024] As a preferred solution of the utility model, it also includes:

[0025] The heat conducting component is laid flat between the PCB and the radiator, and is attached to the PCB and the radiator respectively.

[0026] As a preferred solution of the present invention, the bottom end of the annular groove is in a smooth arc shape.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the present device realizes the rapid installation and disassembly of the radiator through the connecting mechanism, without the use of special tools, greatly simplifying the maintenance process and reducing maintenance costs; compared with the one-piece injection-molded radiator, this solution can replace the radiator individually without replacing the entire module, improving the flexibility and economy of maintenance; compared with the riveted fixed heat dissipation structure, it avoids the complicated disassembly and assembly steps and the dependence on special tools, while providing better long-term stability and reliability; in addition, the fixing force can be flexibly adjusted through the adjustment mechanism to prevent the radiator from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of the utility model;

[0029] Figure 2 yes Figure 1 A top view of

[0030] Figure 3 yes Figure 2 Cross-section of the middle AA section;

[0031] Figure 4 yes Figure 3 A partial enlarged view of part B in the middle;

[0032] Figure 5 This is an exploded view of the support, connection structure and radiator after the protective cover of the utility model is hidden;

[0033] Figure 6 yes Figure 5 A partial enlarged view of the middle C section;

[0034] Figure 7 It is a structural diagram of the connecting mechanism and the regulating mechanism;

[0035] Markings in the accompanying drawings: 1. Support; 2. Connecting mechanism; 21. Groove; 22. Through hole; 23. Adjusting plate; 24. Elastic member; 25. Sphere; 26. Adjusting mechanism; 261. Bearing seat; 262. Screw rod; 263. Threaded groove; 264. Sprocket; 265. Chain; 266. Protective cover; 3. PCB board; 4. Annular groove; 5. Heat conducting member; 6. Radiator. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "embodiment" as used herein refers to specific features, structures, or characteristics that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. Example

[0039] Reference Figure 1-Figure 7 This embodiment provides a heat dissipation mechanism for an automotive PWM speed regulation module, comprising a support 1, a connecting mechanism 2, a heat sink 6, and a PCB board 3. The PCB board 3 is fixed to the support 1 via the connecting mechanism 2. The support 1 has a through hole, and the PCB board 3 partially overlaps with the through hole. The bottom surface of the support 1 is provided with an annular groove 4 for vertically slidingly inserting the heat sink 6. The annular groove 4 is located around the through hole.

[0040] The connecting mechanism 2 includes:

[0041] A groove 21 is provided on the surface of the heat sink 6;

[0042] The through hole 22 has one end connected to the side of the support 1 and the other end connected to the inner wall of the annular groove 4; the inner end of the through hole 22 is set to be an arc shape to prevent the ball 25 from escaping from the through hole 22;

[0043] Reference Figure 4 The adjusting plate 23 slides in the through hole 22 along the axial direction of the through hole 22. More specifically, a sliding groove is provided on the inner wall of the through hole 22, and a protrusion is provided at the end of the adjusting plate 23 to extend into the sliding groove; an elastic member 24 is provided on the inner side of the adjusting plate 23, and the elastic member 24 is a spring;

[0044] The sphere 25 is located in the through hole 22; the two ends of the elastic member 24 are respectively in contact with the adjustment plate 23 and the sphere 25;

[0045] When the heat sink 6 is fixed to the support 1, the through hole 22 faces the groove 21. Under the elastic force of the elastic member 24, part of the sphere 25 passes through the inner end of the through hole 22 and extends into the groove 21.

[0046] The connecting mechanism 2 further includes:

[0047] An adjustment mechanism 26 is provided at the through hole 22 and is used to adjust the position of the adjustment plate 23;

[0048] The specific working process of this device is as follows: the radiator 6 includes a main body and heat dissipation teeth. When installing the radiator 6, the main body is slid and inserted into the annular groove 4. During the insertion process, the surface of the radiator 6 will squeeze the ball 25 in the through hole 22, causing the ball 25 to move outward; when the radiator 6 reaches the specified position (that is, the radiator 6 cannot move), the groove 21 on the surface of the radiator 6 is aligned with the through hole 22 on the support 1, and under the action of the elastic member 24, the ball 25 will extend into the groove 21 on the surface of the radiator 6, thereby firmly fixing the radiator 6 on the support 1; the position of the adjusting plate 23 is adjusted by the adjusting mechanism 26 to control the compression degree of the elastic member 24. This step can be fine-tuned according to actual needs to ensure that the ball 25 can stably extend into the groove 21 of the radiator 6 to provide sufficient fixing force; when the radiator 6 needs to be removed, the adjusting mechanism 26 can be operated to reduce the compression degree of the elastic member 24, and then the radiator 6 can be pulled out, or the radiator 6 can be directly pulled out.

[0049] As a preferred solution of the present invention, a connecting mechanism 2 is provided on at least one side of the support 1. In this embodiment, connecting structures are installed on both sides of the support 1. Multiple connecting mechanisms 2 can fix the radiator 6 from different angles, providing a more uniform pressure distribution, thereby improving the stability and reliability of the overall structure, and effectively preventing the radiator 6 from loosening or falling off even if the vehicle encounters vibration or impact during operation.

[0050] In order to improve the accuracy and good self-locking ability of the adjustment plate 23, as a preferred solution of the present invention, refer to Figure 4 and Figure 7 , the regulating mechanism 26 includes:

[0051] The bearing seat 261 is fixed inside the through hole 22;

[0052] The screw rod 262 is rotatably connected to the bearing seat 261;

[0053] The thread groove 263 is provided on the adjustment plate 23; the screw rod 262 is threadedly connected to the thread groove 263;

[0054] The specific working process of the adjustment mechanism 26 is as follows: the screw rod 262 is rotated. Since the screw rod 262 is threadedly connected to the thread groove 263 on the adjustment plate 23, the rotation of the screw rod 262 drives the adjustment plate 23 to move along the axial direction of the through hole 22. When the adjustment plate 23 moves forward, the elastic member 24 is compressed, increasing the pressure of the elastic member 24 on the ball 25, thereby increasing the pulling force required to separate the radiator 6 from the support 1; when the adjustment plate 23 moves backward, the compression degree of the elastic member 24 is reduced, the pressure is reduced, and the pulling force required to separate the radiator 6 from the support 1 is reduced.

[0055] When the adjustment plate 23 moves to the desired position, the rotation of the screw rod 262 is stopped. Due to the self-locking characteristics of the threaded connection, the adjustment plate 23 will remain in the current position and will not be easily moved due to external force.

[0056] As a preferred solution of the present invention, at least two connecting mechanisms 2 are provided on the same side of the support 1. By providing multiple connecting mechanisms 2 on the same side of the support 1, multi-point fixation can be achieved, providing a more uniform pressure distribution, thereby improving the connection stability between the radiator 6 and the support 1.

[0057] If there are at least two connecting mechanisms 2 on the same side of the support 1, and if there are no corresponding linkage measures, each adjusting mechanism 26 needs to be adjusted separately, which undoubtedly brings inconvenience to the use. As a preferred solution of the present invention, refer to Figure 5 The screw rod 262 is equipped with a sprocket 264, and the two adjacent sprockets 264 on the same side are equipped with a chain 265. When one of the screw rods 262 is driven to rotate, the remaining screw rods 262 will also rotate synchronously under the drive of the sprocket 264 and the chain 265, realizing the synchronous adjustment of multiple adjustment mechanisms 26, greatly simplifying the operation process and improving the accuracy and consistency of the adjustment.

[0058] As a preferred solution of the present invention, the support 1 is provided with a notch on the side of the connecting mechanism 2, such as Figure 5 As shown, the notch provides space for components such as the sprocket 264 and the chain 265, thereby preventing the sprocket 264 and the chain 265 from protruding from the support 1;

[0059] Reference Figure 1 , a protective cover 266 is provided at the notch; at least one end of the screw rod 262 extends out of the protective cover 266, and the protective cover 266 plays a role in protecting the sprocket 264 and the chain 265 to prevent them from being affected by the outside world; and an operating member is provided at the end of the screw rod 262, more specifically, the operating member can be a hexagonal plate or a hexagonal groove, and the screw rod 262 can be driven to rotate by an external handle.

[0060] As a preferred embodiment of the present invention, refer to Figure 3 , also includes:

[0061] The heat conductor 5 is laid flat between the PCB board 3 and the heat sink 6, and is respectively attached to the PCB board 3 and the heat sink 6. The heat conductor 5 can be made of a thermally conductive silicone sheet, a thermally conductive graphite sheet, a thermally conductive metal sheet, etc. The heat conductor 5 has a high thermal conductivity coefficient and can effectively transfer heat from the PCB board 3 to the heat sink 6, which helps to reduce thermal resistance and speed up heat transfer, thereby lowering the operating temperature of electronic components.

[0062] As a preferred embodiment of the present invention, refer to Figure 5 The bottom end of the annular groove 4 is in a smooth arc shape, and the smooth arc bottom end can provide a smoother guiding surface, making the radiator 6 smoother when inserted or removed, reducing friction and jamming.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A heat dissipation mechanism for an automobile PWM speed regulation module, comprising a support (1), a connecting mechanism (2), a radiator (6) and a PCB board (3), wherein the PCB board (3) is fixed to the support (1) via the connecting mechanism (2), the support (1) has a through hole, and the PCB board (3) partially overlaps with the through hole; characterized in that: The bottom surface of the support (1) is provided with an annular groove (4) for the radiator (6) to be vertically slidably inserted, and the annular groove (4) is located around the through hole; The connecting mechanism (2) comprises: A groove (21) is provided on the surface of the heat sink (6); A through hole (22), one end of which is in communication with the side surface of the support (1) and the other end of which is in communication with the inner wall of the annular groove (4); the inner end of the through hole (22) is configured to be an arc shape; An adjustment plate (23) slides in the through hole (22) along the axial direction of the through hole (22); an elastic member (24) is provided on the inner side of the adjustment plate (23); The sphere (25) is located in the through hole (22); two ends of the elastic member (24) are respectively in contact with the adjustment plate (23) and the sphere (25); When the heat sink (6) is fixed to the support (1), the through hole (22) faces the groove (21), and under the elastic force of the elastic member (24), part of the sphere (25) passes through the inner end of the through hole (22) and extends into the groove (21); The connecting mechanism (2) further comprises: An adjustment mechanism (26) is provided at the through hole (22) and is used to adjust the position of the adjustment plate (23).

2. The heat dissipation mechanism of the automobile PWM speed regulation module according to claim 1, characterized in that: The connection mechanism (2) is provided on at least one side surface of the support (1).

3. The heat dissipation mechanism of the automobile PWM speed regulation module according to claim 1, characterized in that: The regulating mechanism (26) comprises: A bearing seat (261) is fixed inside the through hole (22); A screw rod (262) is rotatably connected to the bearing seat (261); A threaded groove (263) is provided on the adjustment plate (23); the screw rod (262) is threadedly connected to the threaded groove (263).

4. The heat dissipation mechanism of the automobile PWM speed regulation module according to claim 3, characterized in that: At least two connecting mechanisms (2) are provided on the same side of the support (1).

5. The heat dissipation mechanism of the automobile PWM speed regulation module according to claim 4, characterized in that: The screw rod (262) is sleeved with a sprocket (264), and two adjacent sprockets (264) located on the same side are sleeved with a chain (265).

6. The heat dissipation mechanism of the automobile PWM speed regulation module according to claim 5, characterized in that: The side surface of the support (1) on which the connecting mechanism (2) is provided is provided with a notch; A protective cover (266) is provided at the notch; at least one end of the screw rod (262) extends outside the protective cover (266); and an operating member is provided at the end of the screw rod (262).

7. The heat dissipation mechanism of the automobile PWM speed regulation module according to claim 1, characterized in that: Also includes: The heat conducting member (5) is laid flat between the PCB board (3) and the radiator (6), and is respectively attached to the PCB board (3) and the radiator (6).

8. The heat dissipation mechanism of the automobile PWM speed regulation module according to claim 1, characterized in that: The bottom end of the annular groove (4) is in a smooth arc shape.

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