CN221614775U - Centrally-mounted motor - Google Patents

Abstract

The utility model relates to the field of electric power-assisted bicycles, in particular to a centrally-mounted motor. The middle motor comprises a core wheel assembly, a core assembly, a controller assembly and a gear assembly; the core wheel assembly at least comprises a base, wherein the base is provided with a first installation surface and a second installation surface, and the first installation surface and the second installation surface are in a mutually-spaced state; the movement assembly is integral and detachably arranged on the first mounting surface; the controller component and the gear component are respectively integrated and detachably arranged on the second mounting surface. According to the centrally-mounted motor, the core wheel assembly, the core assembly, the controller assembly and the gear assembly are at least arranged, and are respectively arranged into a modularized integral structure, and the core wheel assembly, the core assembly, the controller assembly and the gear assembly are integrally connected with one another, so that the technical problem that the centrally-mounted motor in the prior art realizes a modularized connection structure is solved.

Description

Centrally-mounted motor

Technical Field

The utility model relates to the field of electric power-assisted bicycles, in particular to a centrally-mounted motor.

Background

In the prior art, a compact electric power-assisted bicycle mid-mounted motor is provided, and the application number of the patent document is 202023123948.6. In this prior art, the central motor is of a unitary design such that at least the plurality of mechanical components including the motor shaft, the controller and the pinion shaft are surrounded by substantially the same shell-like component, which surrounds at least the central axis of number 2, the pinion shaft of number 23 and the controller of number 21, as seen in fig. 1 of the patent document.

In the prior art, if a user needs to replace at least one of the parts of the motor shaft, the controller and the pinion shaft, a great deal of disassembly work of the middle motor is needed to be realized; for example: to replace the motor shaft, it is necessary to first remove the combination of the motor housing and stator so that the motor shaft remains on the aforementioned shell, and then remove the screws or pins provided on the shell and the cover plate covering the pinion shaft before the motor shaft can be removed; another example is: in order to replace the controller, the motor shaft is removed first, and then the controller can be taken out from the shell-shaped component; and the following steps: in order to replace the pinion shaft, the motor shaft, cover plate and screws or pins described above need to be removed before the pinion shaft can be removed.

The above-mentioned prior art causes inconvenient phenomena of assembling the center motor in an assembly factory and inconvenient phenomena of users in the maintenance process, and the reason for this is that the center motor provided in the above-mentioned prior art cannot realize modularization.

Therefore, how to realize a modularized connection structure of the middle motor in the prior art becomes a technical problem to be solved in the prior art.

Disclosure of utility model

In order to solve the technical problem that a centrally-mounted motor in the prior art realizes a modularized connection structure, the utility model provides a centrally-mounted motor.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

according to one aspect of the present utility model, there is provided a center motor comprising a core assembly, a deck assembly, a controller assembly, and a gear assembly;

The core wheel assembly at least comprises a base, wherein the base is provided with a first installation surface and a second installation surface, and the first installation surface and the second installation surface are in a mutually-spaced state;

the movement assembly is integrally and detachably arranged on the first mounting surface;

The controller component and the gear component are respectively integrated and detachably arranged on the second mounting surface.

Further, the gear assembly at least comprises a positioning bearing, a gear shaft and an end cover;

The two ends of the gear shaft are respectively a first positioning end and a second positioning end, the first positioning end is positioned outside the end cover, and the second positioning end is positioned inside the end cover;

The positioning bearing is arranged at the first positioning end;

The second mounting surface is provided with a first blind hole, and the positioning bearing is arranged in the first blind hole.

Further, the gear assembly further comprises a transmission gear;

The transmission gear is coaxially connected with the gear shaft;

The gear shaft is provided with straight teeth or helical teeth, which are confined between the first positioning end and the transmission gear.

Further, the transmission gear and the gear shaft are respectively made of nylon materials.

Further, the deck assembly at least comprises a deck housing and a deck gear shaft;

A first mounting channel is formed in the base, wherein the first mounting channel forms an opening with the first mounting surface and the second mounting surface respectively;

The two ends of the deck gear shaft of the deck are a receiving end and an output end respectively, the output end is arranged outside the deck housing, and the receiving end is configured inside the deck housing;

The output end is provided with straight teeth or helical teeth, and the output end penetrates through the first mounting surface and the second mounting surface through the first mounting channel.

Further, the core wheel assembly further comprises a second mounting channel, a middle shaft and a core wheel;

the second mounting channel forms a mouth with the first mounting surface and the second mounting surface respectively;

the center shaft penetrates through the first mounting surface and the second mounting surface through the second mounting channel, wherein two ends of the center shaft are respectively positioned outside the first mounting surface and the second mounting surface, and the axial lead of the center shaft is overlapped with the axial lead of the second mounting channel;

the core wheel is coaxially connected with the center shaft, the core wheel and the center shaft are coaxially and simultaneously rotatably connected, wherein straight teeth or inclined teeth of the core wheel and the gear shaft are meshed, and the meshing position of the core wheel and the gear shaft is positioned in the end cover.

Further, the controller assembly is at least electrically connected with the movement assembly;

The controller assembly includes at least a controller end cap;

The controller end cover is provided with a first attaching curved surface;

the end cover of the gear assembly is provided with a second attaching curved surface, and the first attaching curved surface and the second attaching curved surface can be attached to each other.

Further, the dental tray assembly is also included;

the dental tray assembly is arranged on the central shaft positioned at the first mounting surface, the dental tray assembly and the central shaft are coaxially and simultaneously rotatably connected, and the central shaft penetrates through the dental tray assembly;

a space is reserved between the dental tray component and the end cover of the movement component;

A sensor assembly;

The sensor assembly is configured to be sleeved on the bottom bracket, and the sensor assembly is arranged in the second mounting channel;

the sensor assembly is electrically connected with the controller assembly.

Further, the device also comprises a noise sensor;

the noise sensor is arranged on the base, wherein the noise sensor is at least used for detecting noise at the engagement position of the movement assembly and the gear assembly.

The technical scheme has the following advantages or beneficial effects:

According to the centrally-mounted motor, the core wheel assembly, the core assembly, the controller assembly and the gear assembly are at least arranged, and are respectively arranged into a modularized integral structure, and the core wheel assembly, the core assembly, the controller assembly and the gear assembly are integrally connected with one another, so that the technical problem that the centrally-mounted motor in the prior art realizes a modularized connection structure is solved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a center motor according to embodiment 1 of the present utility model;

fig. 2 is a schematic overall structure diagram of another view angle of the center motor according to embodiment 1 of the present utility model;

Fig. 3 is a cross-sectional view of a center motor provided in embodiment 1 of the present utility model;

fig. 4 is a schematic diagram of a split structure of a center motor according to embodiment 1 of the present utility model;

Fig. 5 is a split structure schematic diagram of a gear assembly according to embodiment 1 of the present utility model;

FIG. 6 is a schematic view of the overall structure of a gear assembly according to embodiment 1 of the present utility model;

Fig. 7 is a schematic diagram of a split structure of a movement assembly according to embodiment 1 of the present utility model;

FIG. 8 is a schematic diagram of a split structure of a core assembly according to embodiment 1 of the present utility model;

fig. 9 is a schematic diagram of the overall structure of the controller assembly according to embodiment 1 of the present utility model;

FIG. 10 is a schematic view showing the split structure of a dental tray assembly according to embodiment 1 of the present utility model;

FIG. 11 is a schematic view showing a split structure of a sensor assembly and a center shaft according to embodiment 1 of the present utility model.

Detailed Description

Example 1:

In the present embodiment, referring to fig. 1 to 4, there is provided a center motor including a core assembly 1, a deck assembly 2, a controller assembly 3, and a gear assembly 4;

The core assembly 1 at least comprises a base 101, wherein the base 101 is provided with a first installation surface and a second installation surface, and the first installation surface and the second installation surface are in a mutually-spaced state;

the movement assembly 2 is integrally and detachably arranged on the first mounting surface;

the controller assembly 3 and the gear assembly 4 are respectively integrally and detachably arranged on the second mounting surface.

The base 101 of the core assembly 1 is a mounting object of other components, which at least include a mechanical component, a controller component 3 and a gear component 4.

The movement assembly 2 is disposed on the first mounting surface of the base 101, and the controller assembly 3 and the gear assembly 4 are disposed on the second mounting surface, so that the connection between the mechanical assembly and the base 101, the connection between the controller assembly 3 and the base 101, and the connection between the gear assembly 4 and the base 101 are in a non-interfering state.

The movement assembly 2 may be coupled to the base 101 using prior art coupling methods including, but not limited to, screw coupling, pin coupling, and snap coupling.

The connection manner of the base 101 of the controller assembly 3 and the gear assembly 4 is the same as the connection manner of the movement assembly 2 and the base 101 described above, and will not be described again here.

When the center motor of the present embodiment is assembled independently at an assembly factory (producer) or a user (user), the assembly factory or the user can purchase at least the core assembly 1, the core assembly 2, the controller assembly 3 and the tooth assembly independently, and can assemble the core assembly 1, the core assembly 2, the controller assembly 3 and the gear assembly 4 into the center motor of the present embodiment using simple tools such as screwdrivers, pliers, etc.; this is because, put the motor in this embodiment, each subassembly is the integral erection joint, and connection structure is very simple.

The core assembly 1, the core assembly 2, the controller assembly 3, the gear assembly 4 and the like can be integrally removed by a simple tool when assembling or repairing and maintaining or replacing certain parts by a user.

In the prior art (a compact electric bicycle center motor, application number 202023123948.6), under the condition that the motor shaft needs to be replaced or the condition that the motor shaft needs to be maintained, the combination of the motor housing and the stator 204 needs to be removed first, so that the motor shaft still remains on the shell-shaped component, and then the screws or pins arranged on the shell-shaped component and the cover plate covering the pinion shaft can be removed.

In the middle motor of the embodiment, under the condition that a motor shaft needs to be replaced or the motor shaft needs to be maintained, the whole movement assembly 2 can be detached from the core wheel assembly 1 by adopting a simple tool; compared with the prior art, at least the work of dismantling the screw or the pin and covering the cover plate of the pinion shaft is saved; after the motor shaft has been replaced, the mechanical assembly is then integrally mounted on the core assembly 1, at least saving the work of mounting screws or pins and cover plates covering the pinion shafts, as compared to the prior art described above. Obviously, the middle motor of the embodiment has higher disassembly and assembly efficiency for the motor shaft.

In the middle motor of the embodiment, under the condition that the controller needs to be replaced, a simple tool can be adopted to directly detach the whole controller assembly 3 from the core wheel assembly 1; compared with the prior art, at least the work of dismantling the motor shaft is saved; after the replacement of the controller, the controller assembly 3 is mounted on the core assembly 1 as a whole by a simple tool, which saves at least the work of mounting the motor shaft, compared to the aforementioned prior art. Obviously, in the middle motor of this embodiment, the dismouting efficiency to the controller is higher.

In the case where the center motor of the present embodiment is required to replace one of the components of the gear assembly 4, for example: the gear shaft can be used for directly detaching the whole gear assembly 4 from the core wheel assembly 1 by adopting a simple tool; compared with the prior art, at least the work of dismantling a motor shaft, a cover plate and screws or pins is saved; after replacement of one of the components, the gear assembly 4 is integrally mounted to the core assembly 1 using a simple tool, saving at least the work of mounting the motor shaft, cover plate and screws or pins, relative to the prior art described above.

Therefore, in put motor that this embodiment provided, through being provided with core wheel subassembly, core subassembly, controller subassembly and gear assembly at least, and core wheel subassembly, core subassembly, controller subassembly and gear assembly are set up to modular overall structure respectively, and adopt the mode of integral connection each other, have solved in the prior art put motor and have realized modular connection structure's technical problem.

Referring to fig. 3 or 5 or 6, the aforementioned gear assembly 4 includes an end cap 401, a positioning bearing 402, a second bearing 403, a seal ring 203404, a transmission gear 405, a one-way bearing 406, and a gear shaft 407;

The two ends of the gear shaft 407 are respectively provided with a first positioning end s1 and a second positioning end s2, the first positioning end s1 is positioned outside the end cover 401, and the second positioning end s2 is positioned inside the end cover 401;

The positioning bearing 402 is disposed at the first positioning end s1; in order to realize the supporting function of the positioning bearing 402, a first blind hole is provided on the second mounting surface (the aforementioned second mounting surface of the base 101), and the positioning bearing 402 is disposed in the first blind hole.

The transmission gear 405 and the gear shaft 407 are coaxially connected; the transmission gear 405 is connected with the gear shaft 407 through a one-way bearing 406;

The gear shaft 407 is provided with straight or helical teeth, which are constrained between the first positioning end s1 and the wheel axle.

The second bearing 403 is disposed at the second positioning end s2, and the second bearing 403 is disposed in the end cap 401, where a mounting blind hole is disposed in the end cap 401, and the second bearing 403 is disposed in the mounting blind hole.

The end cap 401 has a mouth for being penetrated by at least the aforementioned transfer gear 405, positioning bearing 402 and gear shaft 407; in actual use, the seal ring 203404 is disposed at the mouth of the end cap 401, so that when the gear assembly 4 is disposed on the core wheel assembly 1, the seal ring 203404 can seal the gap between the end cap 401 and the core wheel assembly 1.

Preferably, the transfer gear 405 and the gear shaft 407 are each formed of a nylon material so as to reduce the weight of the transfer gear 405 and the gear shaft 407, and thus the weight of the gear assembly 4.

Referring to fig. 3 or 7, the cartridge assembly 2 includes a cartridge case 201, a cartridge gear shaft 202, a seal ring 203, a stator 204, a rotor 205, a magnetic steel 206, a hall plate 207, a connection bolt 208, a third bearing 209, a snap ring 210, a positioning pin 211, and a fourth bearing 212;

the base 101 (the unit of the core assembly 1) is provided with a first mounting channel, wherein the first mounting channel forms a mouth with the first mounting surface and the second mounting surface respectively;

The two ends of the deck gear shaft 202 are a receiving end and an output end respectively, the output end is arranged outside the deck housing 201, and the receiving end is configured inside the deck housing 201;

The output end is provided with straight teeth or helical teeth, and penetrates through the first mounting surface and the second mounting surface through the first mounting channel when the core wheel assembly 1 and the core assembly 2 are actually assembled.

The rotor 205 is coaxially connected with the deck gear shaft 202, a clamping groove is formed in the deck gear shaft 202, a clamping ring 210 is arranged in the clamping groove, and the rotor 205 is limited on the deck gear shaft 202 by the clamping ring 210; the rotor 205 is provided with a plurality of mounting holes communicated with the magnetic steel 206, and one magnetic steel 206 is arranged in any mounting hole;

The stator 204 is detachably arranged in the cartridge shell 201 through a connecting bolt 208, wherein the stator 204 is provided with an axial mounting hole, the inner wall of the cartridge shell 201 is provided with an axial threaded hole, and the connecting bolt 208 penetrates through the axial mounting hole and is connected with the axial threaded hole;

A third bearing 209 and a fourth bearing 212 are respectively disposed on the deck gear shaft 202, wherein the third bearing 209 is located between the aforementioned output end and the rotor 205, and the fourth bearing 212 is located at the aforementioned receiving end; in order to realize the positioning of the fourth bearing 212, a mounting blind hole is provided in the cartridge case 201, and the fourth bearing 212 may be provided in the mounting blind hole.

The deck housing 201 is provided with a mouth portion for passing at least the aforementioned rotor 205, deck gear shaft 202, and fourth bearing 212; the end face of the deck case 201 at the mouth is provided with positioning holes, the number of which is the same as that of the positioning pins 211, and one positioning pin 211 is provided in any one of the positioning holes.

At the mouth, a sealing ring 203 is provided, the sealing ring 203 being used to seal the gap between the cartridge housing 201 and the core assembly 1 when the cartridge assembly 2 is actually mounted to the core assembly 1.

Referring to fig. 3 or 8, the foregoing core assembly 1 further includes a central shaft 102, a core 103, a seal ring 104, a positioning pin 105, a fifth bearing 106, a sixth bearing 107, a core sleeve 108, a seventh bearing 109, a countersunk screw 110, a core end cover 111, a one-way bearing 112, and a two-way plug 113;

The base 101 is provided with a second installation channel;

The second mounting channel forms an opening with the first mounting surface and the second mounting surface respectively;

The middle shaft 102 penetrates through the first mounting surface and the second mounting surface through the second mounting channel, wherein two ends of the middle shaft 102 are respectively positioned outside the first mounting surface and the second mounting surface, and the axial lead of the middle shaft 102 is overlapped with the axial lead of the second mounting channel;

The core wheel 103 is coaxially connected with the center shaft 102, the core wheel 103 and the center shaft 102 are coaxially and simultaneously rotatably connected, specifically, an external gear structure is arranged on the center shaft 102, the core wheel 103 is provided with an internal gear structure, and the internal gear and the external gear are meshed with each other; wherein, the straight teeth or the helical teeth of the core wheel 103 and the gear shaft 407 are arranged in a meshed shape, and the meshing position of the core wheel 103 and the gear shaft 407 is positioned in the end cover.

The surface of the base 101 positioned at the second mounting surface is provided with first positioning holes, and meanwhile, the core end cover 111 is provided with second positioning holes, and the number of the first positioning holes and the number of the second positioning holes are respectively the same as the number of the positioning pins 105; any one of the positioning pins 105 is connected to one of the first positioning holes and one of the second positioning holes, respectively;

The sixth bearing 107 is sleeved on the middle shaft 102, wherein the sixth bearing 107 is positioned between the core sleeve 108 and the middle shaft 102;

The sixth bearing 107 is sleeved on the core sleeve 108, wherein the sixth bearing 107 is located between the core sleeve 108 and the base 101 when the core sleeve 108 is actually disposed on the base 101.

The seventh bearing 109 is sleeved on the core sleeve 108, the seventh bearing 109 is positioned at one end of the core sleeve 108, and the sixth bearing 107 are positioned at the other end of the core sleeve 108; when the core sleeve 108 is actually disposed on the base 101, the seventh bearing 109 is located between the core sleeve 108 and the base 101.

The unidirectional bearing 112 is sleeved on the middle shaft 102, and the unidirectional bearing 112 is positioned between the core sleeve 108 and the middle shaft 102; the one-way bearing 112 is used to configure the bottom bracket 102 and the core sleeve 108 into a one-way rotational configuration, such as: the unidirectional bearing 112 is configured to rotate clockwise, when the central shaft 102 rotates clockwise, the unidirectional bearing 112 is driven by the central shaft 102 to rotate clockwise, and the core sleeve 108 is driven by the unidirectional bearing 112 to rotate clockwise, at this time, if the central shaft 102 stops rotating clockwise, the core sleeve 108 can still rotate clockwise; since the core wheel 103 is coaxially mounted on the core wheel sleeve 108 by the countersunk head screw 110, a connection structure is formed in which the core wheel 103 and the center shaft 102 are configured to be coaxial and rotatable at the same time; conversely, if the one-way bearing 112 is configured to rotate clockwise, the one-way bearing 112 cannot be driven by the bottom bracket 102 and the core sleeve 108 cannot be driven by the one-way bearing 112 while the bottom bracket 102 is rotating counterclockwise. It should be understood that the specific structure of the one-way bearing 112 is common knowledge known to those skilled in the art, and will not be described herein.

The base 101 is further provided with a wire passing hole, the bidirectional plug 113 is arranged in the wire passing hole, the wire passing hole forms an opening with the first mounting surface and the second mounting surface respectively, two ends of the bidirectional plug 113 are exposed out of the first mounting surface and the second mounting surface respectively, and the bidirectional plug 113 is provided with a hollow channel used for being penetrated by a wire or a cable.

Referring to fig. 3 or 9, the controller assembly 3 is at least electrically connected to the movement assembly 2; wherein the cable or wire between the controller assembly 3 and the mechanical assembly may pass through the aforementioned bi-directional plug 113;

The controller assembly 3 includes a controller housing 301, a plug base 302, a waterproof plug 303, and a controller;

The controller housing 301 is provided with a first bonding curved surface A1; wherein the interior of the controller housing 301 is for housing a controller, which should be understood as a circuit board having at least a control chip and a communication interface;

The end cover of the gear assembly 4 is provided with a second attaching curved surface A2, and the first attaching curved surface A1 and the second attaching curved surface A2 can be attached to each other.

In practical applications, the controller may be electrically connected to a vehicle controller of the electric bicycle through a communication cable, and the controller may be electrically connected to a sensor disposed on the center motor, where the sensor includes but is not limited to a sound sensor or a torque sensor.

The waterproof plug 303 is provided on the plug base 302, and the plug base 302 penetrates through the inner surface and the outer surface of the controller housing 301; the waterproof plug 303 is used for electrically connecting a controller located inside the controller housing 301, and for connecting a vehicle controller or a sensor or a power supply located outside the controller housing 301.

In addition to the foregoing, referring to fig. 3 or 10, the center motor provided in this embodiment further includes a dental tray assembly 5;

The dental disc assembly 5 is sleeved on a central shaft 102 positioned at the first mounting surface, the dental disc assembly 5 and the central shaft 102 are configured to be coaxially and simultaneously connected in a rotatable manner, and the central shaft 102 penetrates through the dental disc assembly 5; wherein the dental disc assembly 5 is coaxially coupled to the core sleeve 108, the dental disc assembly 5 and the central shaft 102 are configured for coaxial and simultaneously rotatable coupling, which is actually achieved by the combination of the central shaft 102, the one-way bearing 112 and the core sleeve 108 as described above.

A space is left between the dental tray assembly 5 and the end cap of the cartridge assembly 2.

Specifically, the dental tray assembly 5 includes a dental tray 501, a dental tray seat 502, a chain cover 503, a set screw 504, and a core lock nut 505;

The dental tray holder 502 is provided between the dental tray 501 and the chain cover 503, and the dental tray holder 502, the chain cover 503, and the dental tray 501 are connected by a set screw 504; the dental tray 502 is provided with a through hole having a diameter larger than that of the central shaft 102 so that the central shaft 102 can penetrate the through hole, and the dental tray 502 is provided with a mounting boss so that the dental tray 502 can be inserted into a second mounting channel on the core wheel 103 assembly 1 through the mounting boss; in practical arrangement, one end of the core sleeve 108 can be inserted into the through hole on the dental disc seat 502, and an internal thread is arranged on the inner circumferential surface of the core sleeve 108, so that the core lock nut 505 can be inserted into the dental disc seat 502 and the core sleeve 108 once after being sleeved with the middle shaft 102, and finally, the external thread of the core lock nut 505 is connected with the internal thread of the core sleeve 108; after the core lock nut 505 is connected, a gap between the bottom bracket 102 and the core lock nut 505 is sealed by a lock nut oil seal 506.

The centrally-mounted motor provided by the embodiment, referring to fig. 3 or 11, further comprises a sensor assembly 6;

The sensor assembly 6 is configured to be sleeved on the bottom bracket 102, and the sensor assembly 6 is arranged in the second mounting channel;

the sensor assembly 6 is electrically connected to the controller assembly 3.

Wherein the sensor assembly 6 is preferably configured as a torque sensor assembly 6; specifically, the torque sensor assembly 6 includes at least a strain gauge, and the strain gauge detects the deformation of the steel body material caused by the torsion change of the bottom bracket 102, so that the strain gauge generates an electrical signal and can send the electrical signal to the controller of the controller assembly 3.

In addition to the foregoing, the center motor provided in this embodiment further includes a noise sensor;

The noise sensor is arranged on the base, wherein the noise sensor is at least used for detecting the noise of the engagement position of the movement assembly and the gear assembly.

The noise sensor is electrically connected with the controller component, and on one hand, the controller component can provide electric energy for the noise sensor so that the noise sensor can collect sound or noise; in another aspect, the controller assembly is coupled to the torque sensor and the noise sensor, respectively. The noise sensor generates a noise electrical signal when receiving sound or noise, the noise electrical signal is fed back to the controller assembly and is subsequently processed by the controller assembly.

In practical application, the controller component of the central motor is respectively connected with a torque sensor, a tail lamp, a battery, a braking device, a whole vehicle controller (the whole vehicle controller comprises an instrument, a local display screen and/or a communication module) and a headlight. The controller component is in communication connection with the whole vehicle controller of the electric power-assisted bicycle, so that the controller component can convert the received noise electric signal into noise data and send the noise data to the whole vehicle controller; it should be understood that the electrical signal of the sensor is converted into data, which is common knowledge of a person skilled in the art, and will not be described here in detail.

The whole vehicle controller processes the received noise data in the following two ways:

Mode one: if the whole vehicle controller is not provided with the network module and is only provided with the local display, the whole vehicle controller can display the currently received noise data through the local display so that a user can observe the noise data through the local display; in addition, a preset noise threshold may be set in the vehicle controller, for example: 55 dB, if the noise data received by the vehicle controller exceeds the noise threshold (namely, is more than 55 dB), the vehicle controller gives an alarm to a user through a local display, and the alarm can be realized by adopting a flickering screen or a flickering indicator lamp.

Mode two: if the vehicle control unit is configured with a network module, the vehicle control unit may upload the received noise data to the electronic device or the server of the user through the network module, where the electronic device includes: cell phones, tablets, computers, etc.; the server is for example: cloud servers or cloud servers; similarly, a preset noise threshold may be set in the whole vehicle controller, and the current noise data or alarm may be prompted to the user through the local display, or the preset noise threshold may be set in a preset program of the electronic device of the user or in the server, for example: in the APP of the electronic equipment, when the noise data received by the electronic equipment or the server is larger than a preset noise threshold value, the electronic equipment sends a prompt to a user through a screen or an indicator light or sound of the electronic equipment or the server sends alarm information to the electronic equipment of the user, and then sends the prompt to the user through the electronic equipment through the screen or the indicator light or sound of the electronic equipment.

The middle motor needs to carry out noise detection before delivery, and on one hand, the noise standard meeting the responsive laws and regulations is needed, and on the other hand, delivery data is formed on the product of the middle motor, so that follow-up tracing is facilitated. When the middle motor is actually applied to the electric bicycle, if the movement assembly or the gear assembly is not worn or failed or worn within a reasonable range, the noise detected by the noise sensor should be lower than a preset noise threshold; conversely, if the movement assembly or gear assembly is worn out beyond a reasonable range, or fails, the noise sensor is able to detect noise that exceeds a preset noise threshold. In another aspect, if the noise sensor detects the noise exceeding the preset noise threshold, it indicates that the movement assembly and/or the gear assembly is faulty or worn beyond a possible range, so that the user can be prompted to detect and maintain the central motor in the alarm manner, and the use safety of the user is ensured.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the present utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present utility model.

Claims (9)

1. The central motor is characterized by comprising a core wheel assembly, a core assembly, a controller assembly and a gear assembly;

The core wheel assembly at least comprises a base, wherein the base is provided with a first installation surface and a second installation surface, and the first installation surface and the second installation surface are in a mutually-spaced state;

the movement assembly is integrally and detachably arranged on the first mounting surface;

The controller component and the gear component are respectively integrated and detachably arranged on the second mounting surface.

2. The center motor of claim 1, wherein the gear assembly comprises at least a positioning bearing, a gear shaft, and an end cap;

The two ends of the gear shaft are respectively a first positioning end and a second positioning end, the first positioning end is positioned outside the end cover, and the second positioning end is positioned inside the end cover;

The positioning bearing is arranged at the first positioning end;

The second mounting surface is provided with a first blind hole, and the positioning bearing is arranged in the first blind hole.

3. The mid-motor of claim 2, wherein the gear assembly further comprises a drive gear;

The transmission gear is coaxially connected with the gear shaft;

The gear shaft is provided with straight teeth or helical teeth, which are confined between the first positioning end and the transmission gear.

4. A mid-motor as claimed in claim 3, wherein said drive gear and said gear shaft are each formed of nylon material.

5. A mid-motor as claimed in claim 2 or 3, wherein the cartridge assembly comprises at least a cartridge housing and a cartridge gear shaft;

A first mounting channel is formed in the base, wherein the first mounting channel forms an opening with the first mounting surface and the second mounting surface respectively;

The two ends of the deck gear shaft of the deck are a receiving end and an output end respectively, the output end is arranged outside the deck housing, and the receiving end is configured inside the deck housing;

The output end is provided with straight teeth or helical teeth, and the output end penetrates through the first mounting surface and the second mounting surface through the first mounting channel.

6. The center motor of claim 4, wherein the core assembly further comprises a second mounting channel, a center shaft, and a core;

the second mounting channel forms a mouth with the first mounting surface and the second mounting surface respectively;

the center shaft penetrates through the first mounting surface and the second mounting surface through the second mounting channel, wherein two ends of the center shaft are respectively positioned outside the first mounting surface and the second mounting surface, and the axial lead of the center shaft is overlapped with the axial lead of the second mounting channel;

the core wheel is coaxially connected with the center shaft, the core wheel and the center shaft are coaxially and simultaneously rotatably connected, wherein straight teeth or inclined teeth of the core wheel and the gear shaft are meshed, and the meshing position of the core wheel and the gear shaft is positioned in the end cover.

7. The center motor of claim 6, wherein the controller assembly is electrically connected to at least the deck assembly;

The controller assembly includes at least a controller end cap;

The controller end cover is provided with a first attaching curved surface;

the end cover of the gear assembly is provided with a second attaching curved surface, and the first attaching curved surface and the second attaching curved surface can be attached to each other.

8. The center motor of claim 6, further comprising a dental tray assembly;

the dental tray assembly is arranged on the central shaft positioned at the first mounting surface, the dental tray assembly and the central shaft are coaxially and simultaneously rotatably connected, and the central shaft penetrates through the dental tray assembly;

a space is reserved between the dental tray component and the end cover of the movement component;

A sensor assembly;

The sensor assembly is configured to be sleeved on the bottom bracket, and the sensor assembly is arranged in the second mounting channel;

the sensor assembly is electrically connected with the controller assembly.

9. The center motor of claim 1, further comprising a noise sensor;

the noise sensor is arranged on the base, wherein the noise sensor is at least used for detecting noise at the engagement position of the movement assembly and the gear assembly.