A controller and electrically assisted bicycle

Abstract

The application discloses a controller and an electrically-assisted bicycle, and relates to the technical field of electrically-assisted bicycles.The controller comprises a shell and a printed circuit board arranged in the shell.The shell is in a cylindrical shape, and the lateral wall of the shell is provided with an opening.The opening extends axially from the middle part of the lateral wall to one side end face.The board face of the printed circuit board is arranged towards the opening.A connector is arranged on the printed circuit board, and the connector is exposed to the opening.The connector is used for electrically connecting with the line plug of a device.The controller provided by the application is small in size, convenient to disassemble and assemble, and can be installed in a smaller space, thereby reducing the cost and time of replacement and maintenance.

Description

Technical Field

[0001] This invention relates to the field of electric-assisted bicycle technology, and more specifically, to a controller and an electric-assisted bicycle. Background Technology

[0002] The drive system of an electric-assist bicycle generally includes components such as: instrument panel, controller, battery (including battery management system, BMS), sensors, and motor. Among these, the controller is the core component of the drive system, used to control the power output.

[0003] Existing controllers typically have numerous wires, requiring soldering during disassembly and repair, making them inconvenient. Furthermore, existing controllers are generally bulky, making them difficult to install in small electric bicycles. Summary of the Invention

[0004] The purpose of this invention is to provide a controller and an electric-assisted bicycle to solve the problems of existing controllers being inconvenient to disassemble and install and difficult to install in small spaces.

[0005] The embodiments of the present invention are implemented as follows:

[0006] A controller includes a housing and a printed circuit board disposed within the housing. The housing is cylindrical and has an opening on its side wall extending axially from the middle of the side wall to one end face. The printed circuit board has its surface facing the opening and a connector is provided on the printed circuit board, protruding from the opening. The connector is used for electrical connection with a wire plug of a device.

[0007] Optionally, as one possible implementation, the housing includes a housing body, and a first end cap and a second end cap respectively disposed at a first end and a second end cap, the first end cap being disposed close to the opening and the second end cap being disposed away from the opening, the edge of the first end cap coinciding with the contour of the first end of the housing body, and the edge of the second end cap coinciding with the contour of the second end of the housing body.

[0008] Optionally, as an implementable method, the housing further includes a first insulating sheet and a second insulating sheet, the first insulating sheet being located between the first end cap and the housing body, and the second insulating sheet being located between the second end cap and the housing body, the edge of the first insulating sheet coinciding with the edge of the first end cap, and the edge of the second insulating sheet coinciding with the edge of the second end cap.

[0009] Optionally, as an implementable method, the surface of the first insulating sheet facing the first end cover is provided with a boss, the boss is provided with a first through hole parallel to the surface of the first end cover, and the first end cover is provided with a second through hole that mates with the boss.

[0010] Optionally, as an implementable approach, it also includes a heat sink fixed inside the housing and an insulating pad located between the heat sink and the printed circuit board, wherein the printed circuit board and the insulating pad are fixed on the heat sink, and the orthographic projection of the heat sink and the insulating pad on the printed circuit board is separate from the orthographic projection of the connector on the printed circuit board.

[0011] Optionally, as an implementable approach, the heat sink is provided with wire holes, the wire holes extending perpendicularly to the surface of the printed circuit board and corresponding to the power-conducting interfaces on the printed circuit board.

[0012] Optionally, as an implementable approach, the printed circuit board has capacitors protruding from the surface of the printed circuit board, and the heat sink has a first receiving groove for accommodating and accommodating the capacitors.

[0013] Optionally, as an implementable method, the inner wall of the shell body is provided with a first rib, a second rib, a third rib, a fourth rib, and a fifth rib that are parallel to each other. The extension direction of the first rib is parallel to the axial direction of the shell body. The upper surfaces of the second and third ribs and the lower surfaces of the fourth and fifth ribs are located in the same plane. A first groove is formed between the second and fourth ribs, and a second groove is formed between the third and fifth ribs. The heat sink, the insulating pad, and the printed circuit board are all mounted in the first and second grooves. A third groove is provided at the bottom of the heat sink, and the third groove cooperates with the first rib.

[0014] Optionally, as an implementable method, the inner wall of the shell body is further provided with a sixth rib opposite to the first rib. The first rib, the second rib, the third rib and the sixth rib are respectively provided with a second receiving groove. The extension direction of the second receiving groove is parallel to the axial direction of the shell body. The cross-section of the second receiving groove perpendicular to the axial direction of the shell body is arc-shaped. The two ends of the second receiving groove extend to the two ends of the shell body respectively. The first end cap and the second end cap are connected to the shell body by screws. The second receiving groove is used to accommodate the tail of the screw.

[0015] An electric-assisted bicycle comprising a controller as described above.

[0016] The beneficial effects of the embodiments of the present invention include:

[0017] The controller provided by this invention includes a housing and a printed circuit board disposed within the housing. The housing is cylindrical, and an opening is provided on the side wall of the housing, extending axially from the middle of the side wall to one end face. The surface of the printed circuit board faces the opening, and a connector is provided on the printed circuit board, protruding from the opening. The connector is used for electrical connection with the wire plug of a device. By making the housing cylindrical, the controller's size is reduced, allowing it to be installed in a smaller space. Simultaneously, the controller's electrical connection to external devices via the connector reduces the number of wires on the controller, making it easier to disassemble and assemble, and reducing the cost and time of replacement and maintenance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is one of the structural schematic diagrams of the controller provided in an embodiment of the present invention;

[0020] Figure 2 A partial exploded view of the controller provided in an embodiment of the present invention;

[0021] Figure 3 An exploded view of the controller provided in an embodiment of the present invention;

[0022] Figure 4 This is a second schematic diagram of the controller provided in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the heat sink in the controller provided in an embodiment of the present invention;

[0024] Figure 6 This is the third schematic diagram of the controller provided in the embodiment of the present invention;

[0025] Figure 7 This is a partial schematic diagram of the controller provided in an embodiment of the present invention.

[0026] Icons: 100-Controller; 111-Opening; 112-Shell body; 113-First insulating sheet; 1131-Boss; 1132-First through hole; 114-Second insulating sheet; 115-First end cap; 1151-Second through hole; 116-Second end cap; 120-Printed circuit board; 130-Connector; 140-Screw; 150-Heat sink; 151-Wire hole; 152-First receiving groove; 153-Third groove; 154-Threaded hole; 160-Insulating pad; 170-Capacitor; 181-First rib; 182-Second rib; 183-Third rib; 184-Fourth rib; 185-Fifth rib; 186-Sixth rib; 187-First groove; 188-Second groove; 189-Second receiving groove. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that the terms "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Please refer to Figure 1 This embodiment provides a controller 100, which includes a housing and a printed circuit board 120 disposed within the housing. The housing is cylindrical, and an opening 111 is provided on the side wall of the housing. The opening 111 extends axially from the middle of the side wall to one end face. The surface of the printed circuit board 120 is disposed facing the opening 111. A connector 130 is provided on the printed circuit board 120, and the connector 130 is exposed in the opening 111. The connector 130 is used for electrical connection with the wire plug of the device.

[0033] The controller 100 has a hollow, closed-end cylinder housing. Openings 111 are provided on the side walls of the housing, each comprising four edges connected end-to-end. Two opposing edges, distributed along the axial direction of the housing, are located at the middle and one end face of the housing, respectively, while the other two edges are parallel to the housing's axis. The openings 111 divide the housing's side walls into interconnected cylindrical and arc-shaped side walls. The cylindrical side walls have a circular cross-section, while the arc-shaped side walls have a superior arc, semicircle, or minor arc cross-section. Preferably, the arc-shaped side walls have a superior arc cross-section to provide sufficient space for the installation of internal components. The cylindrical housing is smaller than a square housing of the same size, saving installation space. It can be installed in small spaces such as the battery and motor of an electric vehicle. Furthermore, the cylindrical housing is compatible with the shape of the electric vehicle's tube and can be installed inside the tube.

[0034] A printed circuit board 120 is fixed inside the housing. The surface of the printed circuit board 120 is parallel to the axis of the housing and faces the opening 111 of the housing. A connector 130 is provided on the surface of the printed circuit board 120 exposed by the opening 111. The connector 130 can be a socket in the prior art, used to make electrical connection with the wire plugs of other devices outside the controller 100, so as to reduce the number of wires connected to the controller 100 and make the controller 100 easier to disassemble and assemble.

[0035] As described above, the controller 100 includes a housing and a printed circuit board 120 disposed within the housing. The housing is cylindrical, and an opening 111 is provided on the side wall of the housing, extending axially from the middle of the side wall to one end face. The surface of the printed circuit board 120 faces the opening 111, and a connector 130 is provided on the printed circuit board 120, protruding from the opening 111. The connector 130 is used for electrical connection with the wire plug of a device. By making the housing cylindrical, the controller 100 reduces its size, allowing it to be installed in a smaller space. Simultaneously, the controller 100's electrical connection to external devices via the connector 130 reduces the number of wires on the controller 100, making it easier to disassemble and reassemble, and reducing the cost and time of replacement and maintenance.

[0036] To facilitate the installation of internal components, in one possible embodiment of the present invention, the housing includes a housing body 112, and a first end cap 115 and a second end cap 116 respectively disposed at a first end and a second end cap 116 of the housing body 112. The first end cap 115 is disposed near the opening 111, and the second end cap 116 is disposed away from the opening 111. The edge of the first end cap 115 coincides with the outline of the first end of the housing body 112, and the edge of the second end cap 116 coincides with the outline of the second end of the housing body 112.

[0037] The shell includes a shell body 112 (i.e., the sidewall of the shell) and a first end cap 115 and a second end cap 116 that respectively close the first and second ends of the shell body 112. An opening 111 is located on the shell body 112 and is disposed near the first end of the shell body 112. The size and shape of the first end cap 115 are the same as the size and shape of the first end of the shell body 112, so that the edge of the first end cap 115 coincides with the outline of the first end of the shell body 112; the shape and size of the second end cap 116 are the same as the shape and size of the second end of the shell body 112, so that the edge of the second end cap 116 coincides with the outline of the second end of the shell body 112.

[0038] It should be understood that the outline shape of the first end of the shell body 112 can be a major arc, a semicircle or a minor arc, and correspondingly, the edge shape of the first end cap 115 should be an incomplete circle; the outline shape of the second end of the shell body 112 is circular, and correspondingly, the edge shape of the second end cap 116 is also circular.

[0039] The connection between the first end cap 115 and the second end cap 116 and the shell body 112 can be a fixed connection or a detachable connection. Preferably, in order to facilitate the installation of components inside the shell body 112, the first end cap 115 and the second end cap 116 are detachably connected to the shell body 112, such as screw connection, pin connection, etc.

[0040] Please refer to the reference. Figure 2 Optionally, in one possible embodiment of the present invention, the housing further includes a first insulating sheet 113 and a second insulating sheet 114. The first insulating sheet 113 is located between the first end cap 115 and the housing body 112, and the second insulating sheet 114 is located between the second end cap 116 and the housing body 112. The edge of the first insulating sheet 113 coincides with the edge of the first end cap 115, and the edge of the second insulating sheet 114 coincides with the edge of the second end cap 116.

[0041] A first insulating sheet 113, with the same shape and size as the first end cap 115 and overlapping with the shell body 112, is provided between the first end cap 115 and the shell body 112. A second insulating sheet 114, with the same shape and size as the second end cap 116 and overlapping with the shell body 112, is provided between the second end cap 116 and the shell body 112. The first insulating sheet 113 and the second insulating sheet 114 not only have the function of insulation, but also play the role of shock absorption and sealing. The material of the first insulating sheet 113 and the second insulating sheet 114 can be silicone.

[0042] Optionally, in one possible embodiment of the present invention, the surface of the first insulating sheet 113 facing the first end cap 115 is provided with a boss 1131, the boss 1131 is provided with a first through hole 1132 parallel to the surface of the first end cap 115, and the first end cap 115 is provided with a second through hole 1151 that cooperates with the boss 1131.

[0043] A connector 130 is provided on one side of the printed circuit board 120, and a receiving space is formed between the other side and the housing body 112. This space can be used to accommodate power lines and motor three-phase wires, etc. Since these wires need to be led out to connect to external devices, a boss 1131 with a first through hole 1132 is provided on the surface of the first insulating sheet 113 away from the housing body 112. The power lines and motor three-phase wires inside the housing body 112 extend out of the housing through the first through hole 1132. Correspondingly, the first end cap 115 is provided with a second through hole 1151 that allows the boss 1131 to pass through and mate with the outer wall of the boss 1131, so that the surface of the first end cap 115 can fit against the surface of the first insulating sheet 113. At the same time, the boss 1131 and the second through hole 1151 also facilitate the positioning between the first insulating sheet 113 and the first end cap 115.

[0044] For example, the surface of the boss 1131 where the first through hole 1132 is provided is waist-shaped. There are two first through holes 1132, spaced apart along the length of the boss 1131. The two first through holes 1132 are respectively used to pass through the power supply line and the motor three-phase wire. Of course, when there are more than two types of wires inside the housing, the number of first through holes 1132 can also be more than two to allow for the passage of more types of wires.

[0045] Please refer to Figure 3 and Figure 4 Optionally, in one possible embodiment of the present invention, a heat sink 150 fixed inside the housing and an insulating pad 160 located between the heat sink 150 and the printed circuit board 120 are further included. The printed circuit board 120 and the insulating pad 160 are fixed on the heat sink 150, and the orthographic projections of the heat sink 150 and the insulating pad 160 on the printed circuit board 120 are separate from the orthographic projections of the connector 130 on the printed circuit board 120.

[0046] The housing also includes a heat sink 150 and an insulating pad 160. A connector 130 is located on the front of the upper surface of the printed circuit board 120, and the rear of the lower surface is fixedly connected to the heat sink 150 via the insulating pad 160. The length of the heat sink 150 along the axial direction of the housing body 112 is less than the length of the printed circuit board 120 along the axial direction of the housing, so as to leave space below the part of the printed circuit board 120 where the connector 130 is located, for accommodating power cords and motor three-phase wires.

[0047] In this embodiment, the heat sink 150 can be made of aluminum. The heat sink 150 can be fixed to the housing by a screw 140 with a larger diameter. For example, the second end cover 116 of the housing is provided with a round hole, and the surface of the heat sink 150 facing the second end cover 116 is provided with a threaded hole 154 corresponding to the round hole. The screw 140 with a larger diameter passes through the round hole on the second end cover 116 and is threaded to the threaded hole 154 of the heat sink 150 to fix the heat sink 150 to the housing.

[0048] For example, the printed circuit board 120 and the insulating pad 160 are also fixed to the heat sink 150 by screws 140. It is sufficient to pre-set corresponding round holes or threaded holes 154 on the printed circuit board 120, the insulating pad 160, and the heat sink 150. As for the number of round holes or threaded holes 154 and the diameter of the screws 140 used, those skilled in the art should be able to make reasonable selections and designs according to actual needs.

[0049] Please refer to the reference. Figure 3 and Figure 5 Optionally, in one possible embodiment of the present invention, the heat sink 150 is provided with a wire hole 151, the extension direction of the wire hole 151 is perpendicular to the surface of the printed circuit board 120 and is correspondingly arranged with the power interface on the printed circuit board 120.

[0050] The heat sink 150 is provided with wire holes 151, which are used for power cords, motor three-phase wires, and other wires to pass through the wire holes 151, penetrate the insulating pad 160, and then make electrical connections to the power interfaces on the printed circuit board 120. Multiple wire holes 151 may be provided, and their number and distribution can be set according to the number and distribution of power interfaces on the printed circuit board 120.

[0051] Please refer to Figure 3 and Figure 6 Optionally, in one possible embodiment of the present invention, a capacitor 170 protruding from the surface of the printed circuit board 120 is provided on the printed circuit board 120, and a first receiving groove 152 for accommodating and accommodating the capacitor 170 is provided on the heat sink 150.

[0052] The first receiving groove 152 not only prevents interference between the heat sink 150 and the capacitor 170, thus avoiding obstruction of the installation of the capacitor 170, but also provides support for the capacitor 170. It should be understood that the length of the insulating pad 160 along the axial direction of the housing is less than the length of the heat sink 150 along the axial direction of the housing. The portion of the heat sink 150 where the first receiving groove 152 is located does not have the insulating pad 160, so as to avoid the insulating pad 160 interfering with the installation of the capacitor 170.

[0053] Please refer to Figure 4 and Figure 7 Optionally, in one possible embodiment of the present invention, the inner wall of the shell body 112 is provided with a first rib 181, a second rib 182, a third rib 183, a fourth rib 184, and a fifth rib 185 that are parallel to each other. The extending direction of the first rib 181 is parallel to the axial direction of the shell body 112. The upper surfaces of the second rib 182 and the third rib 183, and the lower surfaces of the fourth rib 184 and the fifth rib 185 are respectively located in the same plane. A first groove 187 is formed between the second rib 182 and the fourth rib 184, and a second groove 188 is formed between the third rib 183 and the fifth rib 185. The heat sink 150, the insulating pad 160, and the printed circuit board 120 are all mounted in the first groove 187 and the second groove 188. A third groove 153 is provided at the bottom of the heat sink 150, and the third groove 153 cooperates with the first rib 181.

[0054] The bottom center of the inner wall of the shell body 112 is provided with a first rib 181 extending from the front end to the rear end of the shell body 112. The middle part of the inner wall of the shell body 112 is provided with a second rib 182, a third rib 183, a fourth rib 184 and a fifth rib 185 extending from the front end to the rear end. The upper surface of the second rib 182, the lower surface of the fourth rib 184 and the inner wall of the shell body 112 together form a first groove 187. The upper surface of the third rib 183, the lower surface of the fifth rib 185 and the inner wall of the shell body 112 together form a second groove 188. The first groove 187 and the second groove 188 are at the same height inside the shell body 112 and are used to accommodate and position the heat sink 150, the insulating pad 160 and the printed circuit board 120 on both sides inside the shell. The upper surfaces of the second rib 182 and the third rib 183 are used to cooperate and support the edge part of the lower surface of the heat sink 150. The bottom of the heat sink 150, away from the printed circuit board 120, is provided with a third groove 153 that cooperates with the first rib 181. The first rib 181 restricts the rotation of the heat sink 150 within the housing through the third groove 153. At the same time, the heat sink 150 is also fixedly connected to the second end cover 116 of the housing, thereby fixing the heat sink 150.

[0055] Optionally, in one possible embodiment of the present invention, the inner wall of the shell body 112 is further provided with a sixth rib 186 disposed opposite to the first rib 181. The first rib 181, the second rib 182, the third rib 183 and the sixth rib 186 are respectively provided with a second receiving groove 189. The extension direction of the second receiving groove 189 is parallel to the axial direction of the shell body 112. The cross-section of the second receiving groove 189 perpendicular to the axial direction of the shell is arc-shaped. The two ends of the second receiving groove 189 extend to the two ends of the shell body 112 respectively. The first end cap 115 and the second end cap 116 are connected to the shell body 112 by screws 140. The second receiving groove 189 is used to accommodate the tail of the screw 140.

[0056] A sixth rib 186 extending from the front end to the rear end of the shell body 112 is provided at the top center of the inner wall of the shell body 112. Second receiving grooves 189 are respectively provided on the first rib 181, second rib 182, third rib 183, and sixth rib 186. The two ends of the second receiving groove 189 extend to the opposite first and second end faces of the shell body 112, respectively. The cross-section of the second receiving groove 189 is arc-shaped, preferably a superior arc. When the first end cap 115 and the second end cap 116 are connected to the shell body 112 by screws 140, the front and rear ends of the second receiving groove 189 can be respectively engaged with the screws 140.

[0057] This invention also discloses an electric-assisted bicycle, which includes a controller 100 as described above. This electric-assisted bicycle has the same structure and beneficial effects as the controller 100 in the foregoing embodiments. The structure and beneficial effects of the controller 100 have been described in detail in the foregoing embodiments and will not be repeated here.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A controller, characterized in that, The device includes a housing and a printed circuit board disposed within the housing. The housing is cylindrical and has an opening on its side wall that extends axially from the middle of the side wall to one end face. The surface of the printed circuit board is parallel to the axis of the housing and faces the opening. A connector is provided on the surface of the printed circuit board and protrudes from the opening. The connector is used for electrical connection with a wire plug of a device. The opening includes four edges connected end to end. Two opposing edges distributed along the axial direction of the housing are located at the middle of the housing and one end face of the housing, respectively. The other two edges are parallel to the axis of the housing. The opening divides the sidewall of the housing into interconnected cylindrical sidewalls and arc-shaped sidewalls. The cross-section of the cylindrical sidewall is circular, and the cross-section of the arc-shaped sidewall is a major arc, a semicircle, or a minor arc. The housing is installed inside the vehicle tube of the electric vehicle; The housing includes a housing body, and a first end cap and a second end cap respectively disposed at a first end and a second end cap at a second end of the housing body. The first end cap is disposed close to the opening, and the second end cap is disposed away from the opening. The edge of the first end cap coincides with the outline of the first end of the housing body, and the edge of the second end cap coincides with the outline of the second end of the housing body. The controller also includes a heat sink fixed inside the housing and an insulating pad located between the heat sink and the printed circuit board. The printed circuit board and the insulating pad are fixed on the heat sink, and the orthographic projections of the heat sink and the insulating pad on the printed circuit board are separate from the orthographic projections of the connector on the printed circuit board. The inner wall of the shell body is provided with a first rib, a second rib, a third rib, a fourth rib, and a fifth rib that are parallel to each other. The extension direction of the first rib is parallel to the axial direction of the shell body. The upper surfaces of the second rib and the third rib, and the lower surfaces of the fourth rib and the fifth rib are respectively located in the same plane. A first groove is formed between the second rib and the fourth rib, and a second groove is formed between the third rib and the fifth rib. The heat sink, the insulating pad, and the printed circuit board are all mounted in the first groove and the second groove. A third groove is provided at the bottom of the heat sink, and the third groove cooperates with the first rib. The inner wall of the shell body is also provided with a sixth rib that is opposite to the first rib. The first rib, the second rib, the third rib and the sixth rib are respectively provided with a second receiving groove. The extension direction of the second receiving groove is parallel to the axial direction of the shell body. The cross-section of the second receiving groove perpendicular to the axial direction of the shell body is arc-shaped. The two ends of the second receiving groove extend to the two ends of the shell body respectively. The first end cap and the second end cap are connected to the shell body by screws. The second receiving groove is used to accommodate the tail of the screw. The first rib restricts the rotation of the heat sink within the housing through the third groove. At the same time, the heat sink is also fixedly connected to the second end cover of the housing, thereby fixing the heat sink.

2. The controller according to claim 1, characterized in that, The housing further includes a first insulating sheet and a second insulating sheet. The first insulating sheet is located between the first end cap and the housing body, and the second insulating sheet is located between the second end cap and the housing body. The edge of the first insulating sheet coincides with the edge of the first end cap, and the edge of the second insulating sheet coincides with the edge of the second end cap.

3. The controller according to claim 2, characterized in that, The first insulating sheet has a boss on its surface facing the first end cap, the boss has a first through hole parallel to the surface of the first end cap, and the first end cap has a second through hole that mates with the boss.

4. The controller according to claim 1, characterized in that, The heat sink is provided with wire holes, the extension direction of which is perpendicular to the surface of the printed circuit board and corresponds to the power interface on the printed circuit board.

5. The controller according to claim 1 or 4, characterized in that, The printed circuit board has a capacitor protruding from the surface of the printed circuit board, and the heat sink has a first receiving groove for accommodating and accommodating the capacitor.

6. An electric-assisted bicycle, characterized in that, Includes the controller as described in any one of claims 1 to 5.

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