CN216982312U - Controller and electric power-assisted bicycle - Google Patents

Abstract

The utility model discloses a controller and an electric power-assisted bicycle, and relates to the technical field of electric power-assisted bicycles. The controller provided by the utility model has small volume, is convenient to disassemble and assemble, can be installed in a smaller space, and reduces the cost and time for replacement and maintenance.

Description

Controller and electric power-assisted bicycle

Technical Field

The utility model relates to the technical field of electric power-assisted bicycles, in particular to a controller and an electric power-assisted bicycle.

Background

The drive system of an electrically assisted bicycle generally comprises: the system comprises components such as a meter, a controller, a battery (comprising a battery management system BMS), a sensor, a motor and the like. The controller is a core component in a driving system of the electric power-assisted bicycle and is used for controlling power output.

The existing controller is generally provided with a plurality of wires, and when the controller is disassembled and assembled, the wires need to be welded, so that the disassembly, the assembly and the maintenance are inconvenient. Moreover, the conventional controller is generally large in size and difficult to install in a small-sized electric power-assisted bicycle.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a controller and an electric power-assisted bicycle, and aims to solve the problems that the existing controller is inconvenient to disassemble and assemble and is difficult to install in a small space.

The embodiment of the utility model is realized by the following steps:

a controller comprises a shell and a printed circuit board arranged in the shell, wherein the shell is cylindrical, an opening is formed in the side wall of the shell, the opening axially extends from the middle of the side wall to one side end face, the face of the printed circuit board faces the opening, a connector is arranged on the printed circuit board and exposed out of the opening, and the connector is used for being electrically connected with a line plug of a device.

Optionally, as an implementable manner, 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 of the housing body, the first end cap is disposed close to the opening, the second end cap is disposed away from the opening, an edge of the first end cap coincides with a contour of the first end of the housing body, and an edge of the second end cap coincides with a contour of the second end of the housing body.

Optionally, as an implementable mode, the casing further includes a first insulating sheet and a second insulating sheet, the first insulating sheet is located between the first end cover and the case body, the second insulating sheet is located between the second end cover and the case body, an edge of the first insulating sheet coincides with an edge of the first end cover, and an edge of the second insulating sheet coincides with an edge of the second end cover.

Optionally, as an implementable manner, a boss is disposed on a surface of the first insulating sheet facing the first end cover, a first through hole is disposed on a surface of the boss parallel to the first end cover, and a second through hole matched with the boss is disposed on the first end cover.

Optionally, as an implementable manner, the connector further includes a heat dissipation platform fixed inside the housing and an insulating pad located between the heat dissipation platform and the printed circuit board, the printed circuit board and the insulating pad are fixed on the heat dissipation platform, and an orthographic projection of the heat dissipation platform and the insulating pad on the printed circuit board is separated from an orthographic projection of the connector on the printed circuit board.

Optionally, as an implementable manner, the heat dissipation platform is provided with a wire hole, and an extending direction of the wire hole is perpendicular to the surface of the printed circuit board and is arranged corresponding to the power-on interface on the printed circuit board.

Optionally, as an implementable manner, the printed circuit board is provided with a capacitor protruding from the surface of the printed circuit board, and the heat dissipation platform is provided with a first accommodating groove for accommodating the capacitor in a matching manner.

Optionally, as an implementable mode, 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 which are parallel to each other, the extending direction of the first rib is parallel to the axis direction of the shell body, the upper surfaces of the second rib and the third rib, the lower surfaces of the fourth rib and the fifth rib are respectively located on the same plane, a first groove is formed between the second rib and the fourth rib, a second groove is formed between the third rib and the fifth rib, the heat dissipation table, the insulating pad and the printed circuit board are all erected in the first groove and the second groove, the bottom of the heat dissipation table is provided with a third groove, and the third groove is matched with the first rib.

Optionally, as an implementable mode, the inner wall of the shell body is further provided with a sixth rib arranged opposite to the first rib, the second rib, the third rib and the sixth rib are respectively provided with a second accommodating groove, the extending direction of the second accommodating groove is parallel to the axis direction of the shell body, the cross section of the second accommodating groove perpendicular to the axis direction of the shell body is arc-shaped, two ends of the second accommodating groove respectively extend to two ends of the shell body, the first end cover and the second end cover are connected with the shell body through screws, and the second accommodating groove is used for accommodating the tail portion of the screws.

An electrically assisted bicycle comprising a controller as claimed in any one of the above.

The embodiment of the utility model has the beneficial effects that:

the utility model provides a controller, which comprises a shell and a printed circuit board arranged in the shell, wherein the shell is cylindrical, the side wall of the shell is provided with an opening, the opening axially extends to one side end face from the middle part of the side wall, the plate surface of the printed circuit board is arranged towards the opening, the printed circuit board is provided with a connector, the connector is exposed out of the opening, and the connector is used for being electrically connected with a line plug of a device. The controller is reduced in size by arranging the housing in a cylindrical shape, so that the controller can be installed in a small space. Meanwhile, the controller is electrically connected with a wire plug of an external device through the connector, so that the number of wires on the controller is reduced, the controller is more convenient to disassemble and assemble, and the replacement cost and the maintenance time are reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a controller according to an embodiment of the present invention;

FIG. 2 is a partial exploded view of a controller provided in accordance with an embodiment of the present invention;

FIG. 3 is an exploded view of a controller provided by an embodiment of the present invention;

fig. 4 is a second schematic structural diagram of a controller according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a heat dissipation stage in a controller according to an embodiment of the present invention;

fig. 6 is a third schematic structural diagram of a controller according to an embodiment of the present invention;

fig. 7 is a partial schematic diagram of a controller according to an embodiment of the present invention.

Icon: 100-a controller; 111-opening; 112-a housing body; 113-a first insulating sheet; 1131-boss; 1132 — a first via; 114-a second insulating sheet; 115-a first end cap; 1151-a second via; 116-a second end cap; 120-a printed circuit board; 130-a connector; 140-a screw; 150-a heat dissipation table; 151-wire guides; 152-a first accommodating groove; 153-third groove; 154-a threaded hole; 160-insulating pad; 170-capacitance; 181-first rib; 182-a second rib; 183-third ribs; 184-a fourth rib; 185-fifth ribs; 186-sixth ribs; 187-a first groove; 188-a second groove; 189-second receiving groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside" and "outside" are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the utility model is used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element which is referred to must have a specific orientation, be constructed in a specific orientation and operation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the present embodiment provides a controller 100, which includes a housing and a printed circuit board 120 disposed in the housing, the housing is cylindrical, an opening 111 is disposed on a side wall of the housing, the opening 111 axially extends from a middle portion of the side wall to a side end surface, a board surface of the printed circuit board 120 is disposed toward the opening 111, a connector 130 is disposed on the printed circuit board 120, the connector 130 is exposed from the opening 111, and the connector 130 is used for electrically connecting with a line plug of a device.

The casing of controller 100 is the cylinder that inside cavity, both ends are confined, is equipped with opening 111 on the lateral wall of casing, and opening 111 includes four edges that end to end connects gradually, and wherein, two relative edges that distribute along the casing axial are located the middle part of casing and a side terminal surface of casing respectively, and two other edges are then parallel to the axis of casing respectively. The opening 111 divides the side wall of the housing into a cylindrical side wall and an arc-shaped side wall which are connected with each other, the cross section of the cylindrical side wall is circular, the cross section of the arc-shaped side wall is a major arc, a semicircle or a minor arc, and preferably, the cross section of the arc-shaped side wall is a major arc so as to provide enough space and facilitate the installation of parts in the housing. Compared with a square shell with the same size, the cylindrical shell has smaller volume, saves more installation space, can be installed in small spaces such as batteries and motors of the electric vehicle, is matched with the shape of the vehicle tube of the electric vehicle, and can also be installed in the vehicle tube of the electric vehicle.

A printed circuit board 120 is fixed inside the housing, a surface of the printed circuit board 120 is parallel to an axis of the housing and faces the opening 111 of the housing, a connector 130 is arranged on a surface of the printed circuit board 120 exposed by the opening 111, and the connector 130 may be a socket in the prior art and is used for electrically connecting with a wire plug of another device outside the controller 100, so as to reduce the number of wires connected with the controller 100 and make the controller 100 more convenient to disassemble and assemble.

As described above, the controller 100 includes the housing and the printed circuit board 120 disposed in the housing, the housing is cylindrical, the sidewall of the housing is provided with the opening 111, the opening 111 axially extends from the middle of the sidewall to one side end surface, the plate surface of the printed circuit board 120 is disposed toward the opening 111, the printed circuit board 120 is provided with the connector 130, the connector 130 is exposed to the opening 111, and the connector 130 is used for electrically connecting with the line plug of the device. The controller 100 described above enables the controller 100 to be installed in a small space by providing the housing in a cylindrical shape to reduce the volume of the controller 100. Meanwhile, the controller 100 is electrically connected with a line plug of an external device through the connector 130, so that the number of wires on the controller 100 is reduced, the controller 100 is more convenient to disassemble and assemble, and the replacement and maintenance cost and time are reduced.

To facilitate the installation of the internal components of the housing, in an optional manner, in an implementation of the 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 of the housing body 112, the first end cap 115 is disposed near the opening 111, the second end cap 116 is disposed far from the opening 111, an edge of the first end cap 115 coincides with a contour of the first end of the housing body 112, and an edge of the second end cap 116 coincides with a contour of the second end of the housing body 112.

The housing includes a housing body 112 (i.e., a side wall of the housing) and a first end cap 115 and a second end cap 116 that close a first end and a second end of the housing body 112, respectively, and the opening 111 is located on the housing body 112 and is disposed near the first end of the housing body 112. The first end cap 115 is of the same size and shape as the first end of the housing body 112, respectively, such that the edge of the first end cap 115 coincides with the contour of the first end of the housing body 112; the second end cap 116 is shaped and sized to correspond to the second end of the housing body 112 such that the edge of the second end cap 116 coincides with the contour of the second end of the housing body 112.

It should be appreciated that the first end of the housing body 112 may be contoured to have a major arc, a semi-circle, or a minor arc, and accordingly, the edge of the first endcap 115 may be shaped as an incomplete circle; the second end of the housing body 112 is circular in profile and, correspondingly, the rim of the second end cap 116 is circular in shape.

The first end cap 115 and the second end cap 116 may be fixedly connected to the housing body 112, or detachably connected to the housing body 112, and preferably, in order to facilitate the installation of the components in the housing body 112, the first end cap 115 and the second end cap 116 are detachably connected to the housing body 112, such as screw connection, pin connection, and the like.

Referring to fig. 2, in an optional manner, in an implementation manner of the 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, the second insulating sheet 114 is located between the second end cap 116 and the housing body 112, an edge of the first insulating sheet 113 coincides with an edge of the first end cap 115, and an edge of the second insulating sheet 114 coincides with an edge of the second end cap 116.

A first insulating sheet 113 which has the same shape and size as the first end cap 115 and is overlapped with the first end cap 115 is arranged between the first end cap 115 and the shell body 112, and a second insulating sheet 114 which has the same shape and size as the second end cap 116 and is overlapped with the second end cap 116 is arranged 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 an insulating function, but also can play a role in shock absorption and sealing, and the first insulating sheet 113 and the second insulating sheet 114 can be made of silica gel.

Optionally, in an achievable manner of the embodiment of the present invention, a surface of the first insulating sheet 113 facing the first end cover 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 cover 115, and the first end cover 115 is provided with a second through hole 1151 matching with the boss 1131.

One side of printed circuit board 120 sets up connector 130, has formed accommodation space between opposite side and the casing body 112, can be used for holding wires such as power cord and motor three-phase line, wires such as power cord and motor three-phase line need the export to draw out and be connected with external device electricity, consequently, set up boss 1131 that has first through-hole 1132 on the surface of casing body 112 is kept away from to first insulating piece 113, wires such as the inside power cord of casing body 112 and motor three-phase line stretch out in the casing via first through-hole 1132. Correspondingly, the first end cap 115 is provided with a second through hole 1151 through which the boss 1131 can pass and match with the outer wall of the boss 1131, so that the surface of the first end cap 115 can be attached to the surface of the first insulating sheet 113, and meanwhile, the boss 1131 and the second through hole 1151 facilitate the positioning between the first insulating sheet 113 and the first end cap 115.

Illustratively, the surface of the boss 1131, on which the first through holes 1132 are disposed, is in a kidney shape, the first through holes 1132 include two, the two first through holes 1132 are disposed at intervals along the length direction of the boss 1131, and the two first through holes 1132 are respectively used for passing through a power line and a three-phase motor line. Of course, when the kinds of wires in the housing exceed two, the number of the first through holes 1132 may also be more than two so as to pass more types of wires.

Referring to fig. 3 and 4, in an alternative implementation manner of the embodiment of the present invention, the heat sink 150 is fixed inside the housing, and the insulating pad 160 is located between the heat sink 150 and the printed circuit board 120, the printed circuit board 120 and the insulating pad 160 are fixed on the heat sink 150, and an orthographic projection of the heat sink 150 and the insulating pad 160 on the printed circuit board 120 is separated from an orthographic projection of the connector 130 on the printed circuit board 120.

The housing further comprises a heat sink 150 and an insulating pad 160, wherein the printed circuit board 120 has a connector 130 at the front of the upper surface thereof and a lower surface at the rear thereof, and 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 smaller than the length of the printed circuit board 120 along the axial direction of the housing body, so as to leave a space below the portion of the printed circuit board 120 where the connector 130 is disposed, for accommodating conductors such as power lines and three-phase lines of the motor.

In this embodiment, the heat sink 150 may be made of aluminum, and the heat sink 150 and the housing may be fixed by a screw 140 with a larger diameter, for example, a circular hole is formed on the second end cover 116 of the housing, a threaded hole 154 corresponding to the circular hole is formed on the surface of the heat sink 150 facing the second end cover 116, and the screw 140 with a larger diameter is threaded through the circular hole on the second end cover 116 and then is connected with the threaded hole 154 of the heat sink 150, so as to fix the heat sink 150 on the housing.

Illustratively, the printed circuit board 120 and the insulating pad 160 are also fixed on the heat sink 150 by the screws 140, and only corresponding circular holes or threaded holes 154 are preset on the printed circuit board 120, the insulating pad 160 and the heat sink 150. As for the number of the circular holes or the threaded holes 154, the diameter of the screw 140 to be used, those skilled in the art should be able to make a reasonable choice and design according to the actual requirements.

Referring to fig. 3 and fig. 5, in an alternative implementation manner of the embodiment of the present invention, the heat sink 150 is provided with a wire hole 151, and an extending direction of the wire hole 151 is perpendicular to the surface of the printed circuit board 120 and is disposed corresponding to the power-on interface on the printed circuit board 120.

The heat dissipation platform 150 is provided with a wire hole 151 for passing wires such as a power line and a three-phase motor line, so that the wires such as the power line and the three-phase motor line are electrically connected with the power-on interface on the printed circuit board 120 after passing through the wire hole 151 and penetrating through the insulating pad 160. The wire guide holes 151 may include a plurality of wire guide holes, and the number and distribution positions of the wire guide holes 151 may be set according to the number and distribution positions of the electrical connection ports on the printed circuit board 120.

Referring to fig. 3 and fig. 6, in an alternative implementation manner of the embodiment of the present invention, the printed circuit board 120 is provided with a capacitor 170 protruding from a surface of the printed circuit board 120, and the heat sink 150 is provided with a first receiving groove 152 for accommodating the capacitor 170.

The first receiving groove 152 can not only prevent the heat dissipation stage 150 from interfering with the capacitor 170, preventing the capacitor 170 from being mounted, but also support the capacitor 170. It should be understood that the length of the insulating pad 160 in the axial direction of the case is smaller than the length of the heat radiation stage 150 in the axial direction of the case, and the insulating pad 160 is not provided at the portion of the heat radiation stage 150 where the first receiving groove 152 is provided, so that the insulating pad 160 does not interfere with the installation of the capacitor 170.

Referring to fig. 4 and 7, in an alternative implementation manner of the embodiment of the present invention, the inner wall of the housing 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 which are parallel to each other, the extending direction of the first rib 181 is parallel to the axial direction of the housing 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, 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 erected in the first groove 187 and the second groove 188, the bottom of the heat sink 150 is provided with a third groove 153, and the third groove 153 is matched with the first rib 181.

The middle of the bottom of the inner wall of the housing body 112 is provided with a first rib 181 extending from the front end to the rear end of the housing body 112, the middle of the inner wall of the housing 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 housing body 112 together enclose 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 housing body 112 together enclose a second groove 188, the first groove 187 and the second groove 188 are at the same height in the housing body 112 and are used for accommodating and positioning the two side edges of the heat sink 150, the insulating pad 160 and the printed circuit board 120 arranged in the housing, and the upper surfaces of the second rib 182 and the third rib 183 are used for matching and supporting the edge part of the lower surface of the heat sink 150. The bottom of the heat dissipation platform 150 far away from the printed circuit board 120 is provided with a third groove 153 matched with the first rib 181, the first rib 181 limits the rotation of the heat dissipation platform 150 in the housing through the third groove 153, and meanwhile, the heat dissipation platform 150 is fixedly connected with the second end cover 116 of the housing, so that the heat dissipation platform 150 is fixed.

Optionally, in an achievable manner of the embodiment of the present invention, the inner wall of the housing body 112 is further provided with a sixth rib 186 disposed opposite to 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, an extending direction of the second receiving groove 189 is parallel to the axial direction of the housing body 112, a cross section of the second receiving groove 189 perpendicular to the axial direction of the housing is an arc, two ends of the second receiving groove 189 respectively extend to two ends of the housing body 112, the first end cover 115 and the second end cover 116 are connected to the housing body 112 through the screw 140, and the second receiving groove 189 is used for receiving a tail portion of the screw 140.

The middle of the top of the inner wall of the shell body 112 is provided with a sixth rib 186 extending from the front end to the rear end of the shell body 112, the first rib 181, the second rib 182, the third rib 183 and the sixth rib 186 are respectively provided with a second accommodating groove 189, two ends of the second accommodating groove 189 respectively extend to the first end face and the second end face opposite to the shell body 112, and the cross section of the second accommodating groove 189 is arc-shaped, preferably an arc. When the first and second end caps 115 and 116 are coupled to the case body 112 by the screws 140, the front and rear end portions of the second receiving grooves 189 may be fittingly coupled to the screws 140, respectively.

The embodiment of the utility model also discloses an electric power-assisted bicycle which comprises the controller 100. The electric power assisted bicycle includes the same structure and advantageous effects as the controller 100 in the foregoing embodiment. The structure and advantages of the controller 100 have been described in detail in the foregoing embodiments, and are not described in detail herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a controller, its characterized in that includes the casing and sets up printed circuit board in the casing, the casing is cylindrically, the lateral wall of casing is equipped with the opening, the opening extends to a lateral surface by the middle part axial of lateral wall, printed circuit board's face orientation the opening sets up, the last connector that is equipped with of printed circuit board, the connector expose in the opening, the connector is used for being connected with the line plug electricity of device.

2. The controller of claim 1, wherein the housing comprises a housing body, and first and second end caps disposed at first and second ends of the housing body, respectively, the first end cap being disposed proximate to the opening, the second end cap being disposed distal to the opening, an edge of the first end cap coinciding with a contour of the first end of the housing body, an edge of the second end cap coinciding with a contour of the second end of the housing body.

3. The controller of claim 2, wherein the housing further comprises a first insulating sheet and a second insulating sheet, the first insulating sheet being positioned between the first end cap and the housing body, the second insulating sheet being positioned between the second end cap and the housing body, an edge of the first insulating sheet coinciding with an edge of the first end cap, an edge of the second insulating sheet coinciding with an edge of the second end cap.

4. The controller according to claim 3, wherein 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 matched with the boss.

5. The controller of claim 2, further comprising a heat sink mounted within the housing body and an insulating pad positioned between the heat sink and the printed circuit board, the printed circuit board and the insulating pad being mounted on the heat sink, an orthographic projection of the heat sink and the insulating pad on the printed circuit board being separate from an orthographic projection of the connector on the printed circuit board.

6. The controller according to claim 5, wherein the heat dissipation platform is provided with wire holes, and the wire holes extend in a direction perpendicular to the surface of the printed circuit board and are arranged corresponding to the power-on interfaces on the printed circuit board.

7. The controller according to claim 5 or 6, wherein the printed circuit board is provided with a capacitor protruding from a surface of the printed circuit board, and the heat sink is provided with a first receiving groove for receiving the capacitor in a matching manner.

8. The controller according to claim 5, wherein the inner wall of the housing body is provided with a first rib, a second rib, a third rib, a fourth rib and a fifth rib which are parallel to each other, the extending direction of the first rib is parallel to the axial direction of the housing 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, a second groove is formed between the third rib and the fifth rib, the heat dissipation table, the insulation pad and the printed circuit board are all erected in the first groove and the second groove, a third groove is formed at the bottom of the heat dissipation table, and the third groove is matched with the first rib.

9. The controller according to claim 8, wherein a sixth rib is disposed on the inner wall of the housing body opposite to the first rib, the second rib, the third rib and the sixth rib are respectively provided with a second receiving groove, an extending direction of the second receiving groove is parallel to the axial direction of the housing body, a cross section of the second receiving groove perpendicular to the axial direction of the housing body is circular arc, two ends of the second receiving groove respectively extend to two ends of the housing body, the first end cap and the second end cap are connected to the housing body through screws, and the second receiving groove is used for receiving tails of the screws.

10. An electrically assisted bicycle, characterized in that it comprises a controller according to any of claims 1 to 9.

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