Motor wiring board mounting structure

Abstract

The utility model discloses a motor wiring board installation structure, comprising a heat radiation pedestal and a wiring board, the heat radiation pedestal is provided with a wiring board fixing area, the wiring board fixing area is provided with a connection window, the back surface of the wiring board is provided with an insertion projection, a wiring pin on the wiring board is exposed from the insertion projection, and the wiring pin on the wiring board is connected with the connection window. A sealing plug is embedded into the connecting window, the sealing plug comprises an embedded ring part plugged into the connecting window and a flange edge part in contact fit with the surface of the connecting window, and the inserting protrusion is inserted into the embedded ring part to extrude the embedded ring part and is detachably fixed to the heat dissipation base. And the back surface of the wiring board extrudes the surface of the flange edge part, so that the wiring board and the connecting window are in sealing fit through the sealing plug. According to the wiring board installation structure, the heat dissipation base and the wiring board can be better matched in a sealed mode, and the waterproof performance is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor wiring board installation structure. Background Art

[0002] Current external rotor motors primarily consist of a stator, an external rotor, a heat sink, a PCBA, and a rear cover. The stator is fixed to the front of the heat sink, which has a central shaft. The external rotor is rotatably mounted on the shaft and fits over the stator. The PCBA is fixed to the back of the heat sink, and the rear cover is fixed to the back of the heat sink, covering the PCB. The heat sink is equipped with a wiring harness assembly for convenient connection to the vehicle power supply. The wiring harness typically includes a positive wiring harness, a negative wiring harness, a speed control wiring harness, and optionally an ignition wiring harness. These wiring harnesses are fixed to the heat sink via a terminal block, which is equipped with wiring pins for connecting to each wiring harness.

[0003] Publication No. CN221283497U describes an external rotor motor controller assembly, including the mounting structure between a terminal block and a heat sink. The heat sink has a connection window into which a sealing gasket is pressed. The back of the terminal block presses against the sealing gasket, and the conductive pad on the terminal block extends through the sealing gasket to facilitate electrical connection to the PCBA. The terminal block is secured to the heat sink with screws. The tightening force of the screws forces the back of the terminal block to press against the surface of the sealing gasket, achieving a seal.

[0004] However, the above structure has some disadvantages: 1. First, the seal between the terminal block and the heat sink base is achieved by sealing the surface of the sealing gasket, and the sealing effect is relatively poor; 2. In order to enhance the above sealing effect, the screws between the terminal block and the heat sink base need to be tightened very tightly to ensure sufficient sealing extrusion force. However, the part of the current terminal block used to install the screws is the connecting ear plate located at the edge of the terminal block. The connecting ear plate is a simple plate-like structure, which is not strong enough and is prone to breakage; 3. The current terminal block and the heat sink base are only fixed by bolts, and the pull-out force is all concentrated on the connecting ear plate, which further increases the risk of the connecting ear plate breaking. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a motor terminal board installation structure, which can better seal the heat dissipation base and the terminal board and further improve the waterproof performance.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a motor terminal board mounting structure, including a heat dissipation base and a terminal board, a terminal board fixing area is provided on the heat dissipation base, a connection window is provided on the terminal board fixing area, an insertion protrusion is provided on the back of the terminal board, the connection pins on the terminal board are exposed from the insertion protrusion, a sealing plug is embedded in the connection window, the sealing plug includes an embedded ring portion inserted into the connection window and a flange edge portion contacting and cooperating with the surface of the connection window, the insertion protrusion is inserted into the embedded ring portion to squeeze the embedded ring portion and is detachably fixed to the heat dissipation base, and the back side of the terminal board squeezes the surface of the flange edge portion so that the terminal board and the connection window are sealed and matched through the sealing plug.

[0007] As a preferred solution, the outer side wall and / or the inner side wall of the embedded ring portion are provided with annular side wall ridges.

[0008] As a preferred solution, the front side of the flange is provided with an annular surface ridge.

[0009] As a preferred solution, the terminal block and the heat dissipation base are detachably fixed by screws, and a plurality of connecting ear plate portions are provided on the terminal block. The corresponding heat dissipation base is provided with connecting columns corresponding to the connecting ear plate portions one by one, and each connecting ear plate portion is fixed to the corresponding connecting column by screws, and each connecting ear plate portion is provided with a reinforcing rib.

[0010] As a preferred solution, the reinforcing rib is an annular reinforcing rib, which is arranged on the front side of the terminal block and surrounds the connecting ear plate portion.

[0011] As a preferred solution, an auxiliary anti-slip structure is further provided between the heat dissipation base and the terminal board.

[0012] As a preferred solution, the auxiliary anti-slip structure includes an anti-slip block or an anti-slip ring arranged on the outer periphery of the heat dissipation base. Correspondingly, the anti-slip ring or anti-slip block is arranged on the back of the terminal board, and the anti-slip block is embedded in the anti-slip ring.

[0013] As a preferred solution, the heat dissipation base is provided with a positioning column, and correspondingly, the terminal board is provided with a positioning hole corresponding to the positioning column.

[0014] After adopting the above technical solution, the effect of the utility model is as follows: since the back side of the terminal block is provided with an insertion protrusion, the terminal pins on the terminal block are exposed from the insertion protrusion, and a sealing plug is embedded in the connection window, and the sealing plug includes an embedding ring portion inserted into the connection window and a flange edge portion contacting and cooperating with the surface of the connection window, and the insertion protrusion is inserted into the embedding ring portion to squeeze the embedding ring portion and detachably fixed to the heat dissipation base, and the back side of the terminal block squeezes the surface of the flange edge portion so that the terminal block and the connection window are sealed through the sealing plug, so that an insertion protrusion will be embedded in the embedding ring portion and squeezed into the connection window to achieve one seal, and at the same time, the surface of the flange edge portion will also be squeezed by the terminal block to achieve two seals, thereby improving the overall sealing effect and the waterproof performance. At the same time, due to the improved waterproof sealing effect, the extrusion force of the detachable connection between the terminal block and the heat dissipation base does not need to be too large, thereby reducing the risk of breakage of the connection part between the terminal block and the heat dissipation base.

[0015] Furthermore, since the outer side wall and / or inner side wall of the embedded ring portion is provided with annular side wall ridges, and the front side of the flange edge portion is provided with annular surface ridges, the side wall ridges can improve the sealing reliability between the insertion protrusion and the embedded ring portion, and the surface ridges can improve the sealing reliability between the terminal block and the flange edge portion.

[0016] Since the terminal block and the heat dissipation base are detachably fixed by screws, a plurality of connecting ear plate portions are provided on the terminal block, and corresponding connecting columns corresponding to the connecting ear plate portions are provided on the corresponding heat dissipation base. Each connecting ear plate portion is fixed to the corresponding connecting column by screws, and each connecting ear plate portion is provided with a reinforcing rib, which is an annular reinforcing rib. The annular reinforcing rib is provided on the front of the terminal block and surrounds the connecting ear plate portion. Therefore, the strength of the connecting ear plate portion can be improved by the reinforcing rib.

[0017] Furthermore, an auxiliary anti-slip structure is provided between the heat sink and the terminal block. The auxiliary anti-slip structure includes an anti-slip block or an anti-slip ring provided on the outer periphery of the heat sink. Accordingly, the anti-slip ring or anti-slip block is provided on the back of the terminal block. The anti-slip block is embedded in the anti-slip ring, and the anti-slip block and the anti-slip ring are engaged with each other. This increases the pulling force, thereby further protecting the connecting ear plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 It is a structural stereogram of an embodiment of the utility model;

[0020] Figure 2It is a three-dimensional diagram of another angle of the embodiment of the utility model;

[0021] Figure 3 yes Figure 2 An enlarged schematic diagram at point A;

[0022] Figure 4 It is an exploded diagram of the terminal block and sealing plug;

[0023] Figure 5 This is an exploded view of the terminal block and sealing plug from another angle;

[0024] In the accompanying drawings: 1. Heat dissipation base; 11. Connection window; 12. Anti-slip ring; 2. Terminal block; 21. Insertion protrusion; 22. Connection ear plate; 23. Annular reinforcement rib; 24. Anti-slip block; 25. Positioning hole; 3. Sealing plug; 31. Embedded ring; 32. Flange edge; 33. Side wall ridge; 34. Surface ridge; 4. Positioning column; 5. Terminal pin. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below through specific embodiments.

[0026] like Figures 1 to 5 As shown, a motor terminal block 2 mounting structure includes a heat sink base 1 and a terminal block 2. The heat sink base 1 is provided with a terminal block 2 fixing area, and the terminal block 2 fixing area is provided with a connection window 11. The back of the terminal block 2 is provided with an insertion protrusion 21. The terminal block 2 is made of plastic. The terminal pins 5 on the terminal block 2 are exposed through the insertion protrusion 21. Each terminal pin 5 is embedded in the plastic of the terminal block 2 during the injection molding process of the terminal block 2. Because the terminal pins 5 are embedded in the plastic of the terminal block 2, the terminal pins 5 and the plastic plate itself are sealed. Therefore, the waterproof performance of the entire motor can be improved by simply improving the sealing effect between the terminal block 2 and the heat sink base 1.

[0027] A sealing plug 3 is embedded in the connection window 11, and the sealing plug 3 includes an embedded ring portion 31 inserted into the connection window 11 and a flange edge portion 32 contacting and cooperating with the surface of the connection window 11. The insertion protrusion 21 is inserted into the embedded ring portion 31 to squeeze the embedded ring portion 31 and detachably fix it to the heat dissipation base 1. The back side of the terminal block 2 squeezes the surface of the flange edge portion 32 so that the terminal block 2 and the connection window 11 are sealed together through the sealing plug 3.

[0028] In this embodiment, the outer and / or inner sidewalls of the embedded ring portion 31 are provided with annular sidewall ridges 33. The front surface of the flange rim portion 32 is provided with annular surface ridges 34. The insertion protrusions 21 on the terminal block 2 then squeeze the sidewall ridges 33 when squeezing the embedded ring portion 31. This improves the sealing reliability and facilitates sealing between the embedded ring portion 31 and the inner wall of the connection window 11. Similarly, the front surface ridges 34 are also provided on the flange rim portion 32, which also improves sealing reliability. The cross-sections of the surface ridges 34 and the sidewall ridges 33 are preferably semicircular structures, thereby achieving a linear and surface seal.

[0029] The terminal block 2 is removably secured to the heat sink base 1 by screws. The terminal block 2 is provided with a plurality of connecting lugs 22, and the heat sink base 1 is provided with corresponding connecting posts corresponding to the connecting lugs 22. Each connecting lug 22 is secured to the corresponding connecting post by screws, and each connecting lug 22 is provided with a reinforcing rib. The reinforcing rib is an annular reinforcing rib 23, which is provided on the front of the terminal block 2 and surrounds the connecting lug 22.

[0030] An auxiliary anti-slip structure is also provided between the heat dissipation base 1 and the terminal block 2. The auxiliary anti-slip structure includes an anti-slip block 24 or an anti-slip ring 12 provided on the outer periphery of the heat dissipation base 1. Correspondingly, the anti-slip ring 12 or anti-slip block 24 is provided on the back of the terminal block 2, and the anti-slip block 24 is embedded in the anti-slip ring 12. In this embodiment, for greater convenience, the anti-slip ring 12 is provided on the outer periphery of the heat dissipation base 1, while the anti-slip block 24 is directly provided on the back of the terminal block 2, wherein the anti-slip block 24 and the anti-slip ring 12 are interferingly fitted to achieve mounting.

[0031] In order to facilitate the installation of the terminal block 2 , a positioning column 4 is provided on the heat dissipation base 1 , and correspondingly, a positioning hole 25 corresponding to the positioning column 4 is provided on the terminal block 2 .

[0032] During installation, first insert the insertion protrusion 21 of the terminal block 2 into the embedded ring portion 31, and the flange edge portion 32 contacts the back of the terminal block 2, and then insert the entire terminal block into the connection window 11, so that the positioning column 4 is inserted into the positioning hole 25. At this time, the anti-slip block 24 is also inserted into the anti-slip ring 12, and then the screws can be directly tightened.

[0033] The mounting structure of the motor terminal block 2 can better fix the terminal block 2 to the heat dissipation base 1, with better sealing, a stronger connection, and the ability to resist a greater pulling force.

[0034] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention, without departing from the spirit of the present invention, should fall within the scope of protection defined in the claims of the present invention.

Claims

1. A motor terminal block mounting structure, comprising a heat dissipation base and a terminal block, wherein the heat dissipation base is provided with a terminal block fixing area, and the terminal block fixing area is provided with a connection window, characterized in that: An insertion protrusion is provided on the back of the terminal block, and the terminal pins on the terminal block are exposed from the insertion protrusion. A sealing plug is embedded in the connection window, and the sealing plug includes an embedded ring portion inserted into the connection window and a flange edge portion contacting and cooperating with the surface of the connection window. The insertion protrusion is inserted into the embedded ring portion to squeeze the embedded ring portion and is detachably fixed to the heat dissipation base. The back of the terminal block squeezes the surface of the flange edge portion so that the terminal block and the connection window are sealed and matched through the sealing plug.

2. A motor terminal block mounting structure according to claim 1, characterized in that: The outer side wall and / or the inner side wall of the embedded ring portion are provided with annular side wall ridges.

3. A motor terminal block mounting structure according to claim 2, characterized in that: The front side of the flange is provided with an annular surface ridge.

4. The motor terminal block mounting structure according to claim 1, wherein: The terminal block and the heat dissipation base are detachably fixed by screws. A plurality of connecting ear plate portions are provided on the terminal block, and corresponding connecting columns corresponding to the connecting ear plate portions are provided on the corresponding heat dissipation base. Each connecting ear plate portion is fixed to the corresponding connecting column by screws, and each connecting ear plate portion is provided with a reinforcing rib.

5. The motor terminal block mounting structure according to claim 4, characterized in that: The reinforcing rib is an annular reinforcing rib, which is arranged on the front side of the wiring board and surrounds the connecting ear plate portion.

6. The motor terminal block mounting structure according to claim 1, wherein: An auxiliary anti-slip structure is also provided between the heat dissipation base and the terminal board.

7. A motor terminal block mounting structure according to claim 6, characterized in that: The auxiliary anti-slip structure includes an anti-slip block or an anti-slip ring arranged on the outer periphery of the heat dissipation base. Correspondingly, the anti-slip ring or anti-slip block is arranged on the back of the wiring board, and the anti-slip block is embedded in the anti-slip ring.

8. The motor terminal block mounting structure according to claim 1, wherein: The heat dissipation base is provided with a positioning column, and correspondingly, the wiring board is provided with a positioning hole corresponding to the positioning column.

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