A controller

Abstract

The present invention discloses a controller, which relates to the technical field of electric vehicles. The controller includes an upper cover, a half shell, a circuit board, a lower cover, a MOS transistor and a snap ring. The upper cover and the half shell are fitted and connected to form a receiving cavity that is open at one end; the circuit board is located in the receiving cavity; the lower cover is snap-connected to the upper cover, and the lower cover is used to seal the receiving cavity and sandwich the half shell between the upper cover and the lower cover; the MOS transistor is installed on the circuit board; the snap ring is connected to the half shell and can press the MOS transistor against the inner wall of the half shell. The upper cover and the half shell are fitted and connected, which is convenient for disassembly and assembly and is beneficial to maintenance; at the same time, the MOS transistor can be pressed against the inner wall of the half shell through the snap ring, which can improve the heat dissipation effect of the MOS transistor.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and particularly to a controller. Background Art

[0002] An electric vehicle controller is a core control device used to control the start, operation, forward and reverse movement, speed, stop of the electric vehicle motor, and other electronic devices of the electric vehicle. At present, electric vehicle controllers are all provided with a housing, which can not only protect the controller circuit board inside, but also play a role in heat dissipation, which is beneficial to the heat dissipation of the MOS transistors on the circuit board. In the prior art, the housings of most electric vehicle controllers include an upper cover, a lower cover and a housing body, but both the upper cover and the lower cover are of an integral structure and are mostly connected to the housing body by screws, resulting in inconvenient disassembly and assembly of the controller housing and inconvenient maintenance. Summary of the Invention

[0003] The purpose of the present invention is to provide a controller that can ensure convenient installation and is beneficial to maintenance.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] A controller, which includes:

[0006] An upper cover and a semi-housing body, the upper cover and the semi-housing body are snap-connected to form a receiving cavity with one end open;

[0007] A circuit board, the circuit board is located in the receiving cavity;

[0008] A lower cover, the lower cover is snap-connected to the upper cover, and the lower cover is used to seal the receiving cavity and sandwich the semi-housing body between the upper cover and the lower cover;

[0009] MOS transistors, the MOS transistors are installed on the circuit board;

[0010] A snap ring, the snap ring is connected to the semi-housing body and can press the MOS transistors against the inner wall of the semi-housing body.

[0011] Optionally, the snap ring includes a U-shaped body, a limiting portion connected to opposite side walls of the U-shaped body, and an elastic portion, one end of the elastic portion is connected to the U-shaped body, and the other end inclines towards the direction where the opening of the U-shaped body is located; the limiting portion can be inserted into the semi-housing body so that the elastic portion undergoes elastic deformation to press the MOS transistors against the inner wall of the semi-housing body.

[0012] Optionally, one of the upper cover and the lower cover is provided with a first snap protrusion, and the other is provided with a first snap groove, and the first snap protrusion is snap-connected to the first snap groove.

[0013] Optionally, the upper cover is provided with a first extension portion extending towards the lower cover, and the first card slot is arranged on the first extension portion. The lower cover is provided with a second extension portion extending towards the upper cover, and the first card protrusion is arranged on the outer wall of the second extension portion. The inner wall of the first extension portion is attached to the outer wall of the second extension portion.

[0014] Optionally, a first through groove is arranged on the inner wall of the half shell, and the first extension portion is located in the first through groove.

[0015] Optionally, a plurality of second card slots are arranged at intervals on the inner side wall of the upper cover, and a plurality of second card protrusions are arranged at intervals on the lower cover. The second card slots and the second card protrusions correspond to each other one by one, and the second card protrusions are clamped with the corresponding second card slots.

[0016] Optionally, the lower cover is provided with a first positioning post, the upper cover is provided with a second positioning post, and a second through groove is arranged on the inner wall of the half shell. Both the first positioning post and the second positioning post are inserted into the second through groove.

[0017] Optionally, the lower cover is further provided with a plurality of third positioning posts at intervals, and a plurality of positioning holes are arranged at intervals on the side wall of the upper cover. The plurality of third positioning posts and the plurality of positioning holes are inserted and matched with each other one by one.

[0018] Optionally, the upper cover is provided with an opening communicating with the accommodation cavity, and a plurality of terminals are fixed on the circuit board. All the plurality of terminals extend out of the upper cover from the opening.

[0019] Optionally, the half shell is made of aluminum profile, and the upper cover and the lower cover are both made of plastic material.

[0020] Advantages of the present invention: For the controller provided by the present invention, an accommodation cavity for placing the circuit board can be formed between the upper cover and the half shell, and the lower cover is used for plugging, which can play a role in protecting the circuit board. Moreover, the upper cover and the half shell are connected in an embedded manner, and when repairing, only the embedded point needs to be opened, which is beneficial for repair and will not cause damage to the half shell of the controller. At the same time, the upper cover and the lower cover are clamped and matched with each other, with reliable fixation and not easy to loosen, which can ensure the convenient and fast assembly of the controller. In addition, a MOS tube is installed on the circuit board, and the MOS tube can be tightly pressed against the inner wall of the half shell through a snap spring, which can improve the heat dissipation effect of the MOS tube and prevent the MOS tube from being burned out. Description of the Drawings

[0021] Figure 1 is an exploded view of the controller provided by the embodiment of the present invention;

[0022] Figure 2 is a top view of the controller provided by the embodiment of the present invention;

[0023] Figure 3 It is a schematic structural diagram of a circlip of a controller provided by an embodiment of the present invention.

[0024] In the figure:

[0025] 1 - upper cover; 11 - opening; 12 - first card slot; 13 - first extension; 14 - first positioning post;

[0026] 2 - half shell; 21 - first through slot; 22 - second through slot; 23 - slot;

[0027] 3 - circuit board; 31 - terminal;

[0028] 4 - lower cover; 41 - first convex; 42 - second extension; 43 - third extension; 44 - second convex; 45 - second positioning post; 46 - third positioning post;

[0029] 5 - MOS transistor;

[0030] 6 - circlip; 61 - U-shaped body; 611 - first plate; 612 - second plate; 62 - limiting part; 63 - elastic part. Specific embodiments

[0031] To make the technical problems solved by the present invention, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0034] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0035] As Figures 1 - 3 shown, the controller includes an upper cover 1, a half shell 2, a circuit board 3, a lower cover 4, a MOS tube 5 and a circlip 6. The upper cover 1 is fitted and connected with the half shell 2 to form a receiving cavity with one end open. The circuit board 3 is located in the receiving cavity. The lower cover 4 is snap-connected with the upper cover 1. The lower cover 4 is used to seal the receiving cavity and clamp the half shell 2 between the upper cover 1 and the lower cover 4. The MOS tube 5 is mounted on the circuit board 3. The circlip 6 is connected with the half shell 2 and can press the MOS tube 5 against the inner wall of the half shell 2. It can be understood that a receiving cavity for placing the circuit board 3 can be formed between the upper cover 1 and the half shell 2 and sealed by the lower cover 4, which can play a protective role for the circuit board 3. Moreover, the upper cover 1 and the half shell 2 are fitted and connected. When it is necessary to repair the internal circuit board 3, the half shell 2 can be directly removed from the upper cover 1 by opening the fitting point, which is beneficial for repair and will not cause damage to the half shell 2 of the controller. At the same time, the upper cover 1 and the lower cover 4 are snap-connected, with reliable fixation and not easy to loosen, which can ensure the convenient and fast assembly of the controller. At the same time, the MOS tube 5 is mounted on the circuit board 3, and the MOS tube 5 can be pressed against the inner wall of the half shell 2 through the circlip 6, which can improve the heat dissipation effect of the MOS tube 5 and prevent the MOS tube 5 from burning out.

[0036] Specifically, the upper cover 1 is provided with an opening 11 communicating with the receiving cavity. A plurality of terminals 31 are fixed on the circuit board 3, and all the plurality of terminals 31 extend out of the upper cover 1 from the opening 11. It can be understood that the terminals 31 on the circuit board 3 can extend out of the opening 11 of the upper cover 1, which can ensure that the controller does not need to lead wires into the interior of the receiving cavity, simplifying the structure of the controller. As for the specific structure of the circuit board 3 and the structure and principle of the terminals 31, they are all prior art and will not be elaborated herein.

[0037] In this embodiment, there are three openings 11, which are arranged at intervals at two adjacent edges of the upper cover 1. The terminals 31 on the circuit board 3 are arranged in three groups, and the three groups of terminals 31 can respectively extend out from the three openings 11, which can prevent external wiring from extending into the accommodation cavity. In other embodiments, the number of terminals 31 and openings 11 can be adaptively increased or decreased according to the different usage conditions of the controller.

[0038] In this embodiment, the half shell 2 is arranged in an L-shaped structure. The half shell 2 and the upper cover 1 can form a rectangular accommodation cavity, and the circuit board 3 is arranged in a rectangular shape. In other embodiments, the half shell 2 can also be of other shapes.

[0039] Specifically, grooves are provided at the edges of both sides of the half shell 2. Correspondingly, protrusions are provided at the connection between the upper cover 1 and the half shell 2. The half shell 2 is connected to the upper cover 1 by the engagement of the protrusions and the grooves. When it is necessary to repair the internal circuit board 3, only the half shell 2 needs to be removed from the upper cover 1, and the operation is simple and convenient.

[0040] Optionally, the half shell 2 is made of aluminum profile, and the upper cover 1 and the lower cover 4 are both made of plastic material. It can be understood that the plastic material is light in weight, which is beneficial to reducing the weight of the controller; at the same time, the aluminum profile is light in weight and has good heat conduction performance. When the MOS tube 5 abuts against the inner wall of the half shell 2, the heat dissipation of the MOS tube 5 is more favorable through the half shell 2. In other embodiments, other materials can also be selected for the upper cover 1, the lower cover 4 and the half shell 2.

[0041] Optionally, as Figure 1 shown, a first clamping protrusion 41 is provided on one of the upper cover 1 and the lower cover 4, and a first clamping groove 12 is provided on the other. The first clamping protrusion 41 is engaged with the first clamping groove 12. It can be understood that through the clamping cooperation of the first clamping protrusion 41 and the first clamping groove 12, the installation between the upper cover 1 and the lower cover 4 can be ensured to be convenient. In this embodiment, the first clamping protrusion 41 is provided on the lower cover 4, and the first clamping groove 12 is provided on the upper cover 1. In other embodiments, the first clamping protrusion 41 can also be provided on the upper cover 1, and the first clamping groove 12 can be provided on the lower cover 4.

[0042] Optionally, the upper cover 1 is provided with a first extension portion 13 extending in the direction of the lower cover 4. A first card slot 12 is provided on the first extension portion 13. The lower cover 4 is provided with a second extension portion 42 extending in the direction of the upper cover 1. A first card projection 41 is provided on the outer wall of the second extension portion 42. The inner wall of the first extension portion 13 is in contact with the outer wall of the second extension portion 42. Specifically, since the half shell 2 and the upper cover 1 can form a rectangular accommodation cavity, the lower cover 4 is also rectangular, and its size should ensure that it can block the accommodation cavity and be connected to the upper cover 1. In this embodiment, a second extension portion 42 is provided at a short side of the lower cover 4, and a first extension portion 13 is provided at the corresponding position on the upper cover 1. The first extension portion 13 is perpendicularly connected to the upper cover 1, and the lower cover 4 is perpendicularly connected to the second extension portion 42. When the upper cover 1 and the lower cover 4 are engaged in a snap-fit manner, both the first extension portion 13 and the second extension portion 42 can extend into the half shell 2, ensuring that after the first card slot 12 and the first card projection 41 are engaged, they are located within the half shell 2. This can not only ensure the aesthetics of the external structure of the controller but also prevent the upper cover 1 and the lower cover 4 from detaching from the half shell 2 due to accidental contact after the first card slot 12 and the first card projection 41 are engaged. In addition, when the first card projection 41 is engaged with the first card slot 12, the contact between the inner wall of the first extension portion 13 and the outer wall of the second extension portion 42 can ensure the reliability of the engagement. In other embodiments, the numbers of the first extension portion 13 and the second extension portion 42 can be adjusted adaptively.

[0043] Optionally, as Figure 1 shown, to further ensure the engagement effect between the first card slot 12 and the first card projection 41 and improve the structural stability of the controller, a first through slot 21 is provided on the inner wall of the half shell 2, and the first extension portion 13 is located within the first through slot 21. It can be understood that when the first extension portion 13 and the second extension portion 42 move towards each other and enter the half shell 2, the first extension portion 13 can enter the corresponding first through slot 21. The first through slot 21 can guide the movement of the first extension portion 13 and also play a limiting role, further improving the structural stability of the controller. In this embodiment, since the first extension portion 13 is a rectangular structure, the first through slot 21 is also provided as a rectangular slot. In other embodiments, the number and shape of the first through slot 21 can be adjusted adaptively according to the first extension portion 13.

[0044] Specifically, a plurality of second card slots are spacedly provided on the inner side wall of the upper cover 1, and a plurality of second card protrusions 44 are spacedly provided on the lower cover 4. The second card slots and the second card protrusions 44 correspond to each other one by one, and the second card protrusions 44 are snap-fitted with the corresponding second card slots. In this embodiment, the lower cover 4 is spacedly provided with a plurality of third extension portions 43 extending towards the upper cover 1, and second card protrusions 44 are provided on the outer walls of the respective third extension portions 43. Since the distance between the second card slots of the upper cover 1 and the lower cover 4 is closer, the size of the third extension portion 43 is smaller than the size of the second extension portion 42. As for the number of the third extension portions 43 and the second card slots, there is no limitation here, and it is only necessary to ensure reliable connection between the upper cover 1 and the lower cover 4.

[0045] Optionally, to further ensure the snap-fitting effect between the upper cover 1 and the lower cover 4, the lower cover 4 is provided with a first positioning post 45, the upper cover 1 is provided with a second positioning post 14, and a second through groove 22 is provided on the inner wall of the half shell 2. Both the first positioning post 45 and the second positioning post 14 are inserted into the second through groove 22. In this embodiment, the number of both the first positioning post 45 and the second positioning post 14 is two. Correspondingly, the number of the second through grooves 22 is also two, which are respectively provided on two sides of the half shell 2 and are spaced from the grooves at the edges of the two sides. The first positioning post 45 is also spaced from the second extension portion 42 and the third extension portion 43, and the first positioning post 45 is vertically connected to the lower cover 4, and the second positioning post 14 is vertically connected to the upper cover 1. When the first card slot 13 and the first card protrusion 41 are snap-fitted, both the first positioning post 45 and the second positioning post 14 can be inserted into the second through groove 22, which can further guide and position the snap-fitting of the first card slot 12 and the first card protrusion 41 and ensure the snap-fitting effect.

[0046] In this embodiment, both the first positioning post 45 and the second positioning post 14 are circular positioning posts with the same size. Correspondingly, the second through groove 22 is a circular groove. In other embodiments, the first positioning post 45 and the second positioning post 14 can also be selected in other shapes such as square, and the shape of the second through groove 22 can be adaptively set according to the shapes of the first positioning post 45 and the second positioning post 14.

[0047] Optionally, the lower cover 4 is also spacedly provided with a plurality of third positioning posts 46, and a plurality of positioning holes are spacedly provided on the side wall of the upper cover 1. The plurality of third positioning posts 46 are inserted and matched with the plurality of positioning holes one by one. In this embodiment, the third positioning post 46 is spaced from the third extension portion 43, and the size of the third positioning post 46 is smaller than the size of the first positioning post 45. Through the cooperation of the third positioning post 46 and the positioning hole, it can further play a role in guiding and limiting the connection between the upper cover 1 and the lower cover 4.

[0048] In this embodiment, the third positioning post 46 is a circular positioning post. Correspondingly, the positioning hole is also circular. In other embodiments, the third positioning post 46 and the positioning hole can also be in other shapes.

[0049] Optionally, as Figure 1 and Figure 3 shown, the snap ring 6 includes a U-shaped body 61, a limiting portion 62 connected to opposite side walls of the U-shaped body 61, and an elastic portion 63. One end of the elastic portion 63 is connected to the U-shaped body 61, and the other end inclines towards the direction where the opening of the U-shaped body 61 is located. The limiting portion 62 can be inserted into the half shell 2 so that the elastic portion 63 elastically deforms to press the MOS transistor 5 against the inner wall of the half shell 2. It can be understood that through the elastic action of the elastic portion 63 of the snap ring 6, the MOS transistor 5 can be pressed against the inner wall of the half shell 2, which is beneficial to the heat dissipation of the MOS transistor 5. At the same time, it can ensure that the disassembly of the snap ring 6 is not affected while ensuring that the pressing force is sufficient.

[0050] Specifically, a slot 23 for inserting the U-shaped body 61 is provided on the inner wall of the half shell 2, and the limiting portion 62 is limited in the slot 23. It can be understood that through the insertion and cooperation of the limiting portion 62 and the slot 23, the disassembly and assembly of the snap ring 6 can be ensured to be convenient, and at the same time, the elastic portion 63 elastically deforms to press the MOS transistor 5 tightly.

[0051] Specifically, as Figure 3 shown, the U-shaped body 61 includes a first plate 611 and two second plates 612 connected to both sides of the first plate 611. The MOS transistor 5 is located between the first plate 611 and the inner wall of the housing 1. The elastic portion 63 is provided on the first plate 611, and the limiting portion 62 is connected to the second plate 612. It can be understood that the first plate 611 and the two second plates 612 form a U-shaped body 61. The MOS transistor 5 is placed in the accommodation space of the U-shaped body 61 and can be pressed tightly against the elastic portion 63, and is pressed tightly against the inner wall of the half shell 2 under the action of the pressing force of the elastic portion 63. In this embodiment, there are two elastic portions 63, and they are arranged at intervals along the direction connecting the two second plates 612. The two elastic portions 63 can act on the two MOS transistors 5 simultaneously, or when acting on one MOS transistor 5, they can ensure a greater pressing force, so that the MOS transistor 5 is not easily separated from the half shell 2, ensuring the heat dissipation effect. In other embodiments, the number of the elastic portions 63 can also be adaptively adjusted according to the usage situation.

[0052] In this embodiment, the extending directions of the two limiting portions 62 are the same as the extending direction of the first plate 611, and the orientations of the two limiting portions 62 are opposite. That is, the limiting portion 62 and the connected second plate 612 form an L-shaped structure. Correspondingly, the slot 23 is also set to be L-shaped, that is, it includes a first slot and a second slot that are vertically connected. When the snap spring 6 is inserted and matched with the half shell 2, the limiting portion 62 is inserted and matched with the first slot, and the second plate 612 is inserted and matched with the second slot. The L-shaped structure formed by the limiting portion 62 and the second plate 612 can ensure that the snap spring 6 is inserted and matched with the half shell 2 and will not detach from the half shell 2. In other embodiments, the limiting portion 62 and the connected second plate 612 can also form a T-shaped structure. Correspondingly, the slot 23 can also be set to be a T-shaped slot. In this embodiment, the slot 23 is arranged on the side wall of the half shell 2 provided with a first through groove 21 and is arranged at an interval from the first through groove 21, which can ensure that when the limiting portion 62 of the snap spring 6 is located in the slot 23, it does not affect the clamping connection between the upper cover 1 and the lower cover 4. In other embodiments, the position of the slot 23 can also be adjusted adaptively.

[0053] As Figure 1 and Figure 2 shown, on the opposite sides of the lower cover 4 of the controller in this embodiment, there are also connecting ears provided with connecting holes, and the controller can be fixed by bolts passing through the connecting holes. In other embodiments, the connecting ears may not be provided, and the controller can be directly fixed through the lower cover 4.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A controller, characterized in that, Comprising: An upper cover (1) and a semi - housing (2), the upper cover (1) and the semi - housing (2) are fitted and connected to form a receiving cavity that is open at one end; A circuit board (3), the circuit board (3) is located within the receiving cavity; A lower cover (4), the lower cover (4) is snap - connected to the upper cover (1), and the lower cover (4) is used to seal the receiving cavity and sandwich the semi - housing (2) between the upper cover (1) and the lower cover (4); A MOS transistor (5), the MOS transistor (5) is mounted on the circuit board (3); A circlip (6), the circlip (6) is connected to the semi - housing (2) and can press the MOS transistor (5) against the inner wall of the semi - housing (2); The circlip (6) includes a U - shaped body (61), a limiting portion (62) connected to opposite side walls of the U - shaped body (61), and an elastic portion (63). One end of the elastic portion (63) is connected to the U - shaped body (61), and the other end inclines towards the direction where the opening of the U - shaped body (61) is located; the limiting portion (62) can be inserted into the semi - housing (2) so that the elastic portion (63) undergoes elastic deformation to press the MOS transistor (5) against the inner wall of the semi - housing (2); One of the upper cover (1) and the lower cover (4) is provided with a first clamping projection (41), and the other is provided with a first clamping groove (12), and the first clamping projection (41) is snap - connected to the first clamping groove (12); A plurality of second clamping grooves are spacedly arranged on the inner side wall of the upper cover (1), and a plurality of second clamping projections (44) are spacedly arranged on the lower cover (4). The second clamping grooves and the second clamping projections (44) correspond one by one, and the second clamping projections (44) are snap - connected to the corresponding second clamping grooves; 2. The controller according to claim 1, wherein The upper cover (1) is provided with a first extension portion (13) extending towards the lower cover (4), and the first clamping groove (12) is arranged on the first extension portion (13). The lower cover (4) is provided with a second extension portion (42) extending towards the upper cover (1), and the first clamping projection (41) is arranged on the outer wall of the second extension portion (42). The inner wall of the first extension portion (13) is in contact with the outer wall of the second extension portion (42); 3. The controller according to claim 2, characterized in that, A first through - groove (21) is arranged on the inner wall of the semi - housing (2), and the first extension portion (13) is located within the first through - groove (21); 4. The controller according to claim 1, characterized in that The lower cover (4) is provided with a first positioning post (45), the upper cover (1) is provided with a second positioning post (14), and a second through - groove (22) is arranged on the inner wall of the semi - housing (2). Both the first positioning post (45) and the second positioning post (14) are inserted into the second through - groove (22); 5. The controller according to claim 1, wherein The lower cover (4) is further spacedly provided with a plurality of third positioning posts (46), and a plurality of positioning holes are spacedly arranged on the side wall of the upper cover (1). The plurality of third positioning posts (46) are inserted and matched with the plurality of positioning holes one by one.

6. The controller according to claim 1, characterized in that The upper cover (1) is provided with an opening (11) communicating with the accommodation cavity, and a plurality of terminals (31) are fixed on the circuit board (3), and the plurality of terminals (31) all extend out of the upper cover (1) from the opening (11).

7. The controller according to any one of claims 1-5, characterized in that, The half shell (2) is made of aluminum profile, and the upper cover (1) and the lower cover (4) are both made of plastic material.

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