Clutch assembly, middle motor and moped
By setting up a special structure of human and electric clutch in the clutch of the power assist bicycle, the contact area is increased and the needle rolling clutch assembly is adopted, which solves the problems of low torque bearing capacity and slow response speed in the prior art, and achieves a more efficient Clutch effect.
Patent Information
- Application Number
- CN202421043493.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-14
AI Technical Summary
The existing clutch human clutch and electric clutch of power bicycles have a small contact area with the clutch housing, resulting in low torque bearing capacity, low clutch efficiency, and slow response speed.
By setting the human clutch in the clutch housing, the electric clutch is set outside the clutch housing, the human clutch is locked from the inside to the outside, and the electric clutch housing is locked from the outside to the inside, increasing the contact area; at the same time, a needle roller clutch assembly is used, Improved response speed and locking speed.
It achieves greater torque tolerance and higher clutch efficiency, faster response speed and faster locking.
Smart Images
Figure CN222436890U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power-assisted vehicles, and in particular to a clutch assembly, a mid-mounted motor and a power-assisted vehicle. Background Art
[0002] The existing power-assisted bicycle has a clutch in the middle motor, and the clutch includes a manual clutch, an electric clutch and a clutch housing. However, the manual clutch and the electric clutch of the existing clutch are both arranged in the clutch housing, so that both the manual clutch and the electric clutch have a small contact area with the clutch working surface of the clutch housing, so that the torque that can be tolerated is small and the clutch efficiency is low. In addition, the existing clutch usually adopts a ratchet, a spring and a groove to cooperate to achieve clutching. However, this clutch method has a slow response speed and slow locking, which further reduces the clutch efficiency. In view of the above problems, it is necessary to provide a clutch that can withstand greater torque and improve the response speed. Utility Model Content
[0003] In order to solve at least one of the problems mentioned in the above background technology, the utility model provides a clutch assembly, a mid-mounted motor and a power-assisted vehicle, wherein the clutch assembly can withstand greater torque, improve response speed, and lock faster.
[0004] The specific technical solutions provided by the utility model are as follows:
[0005] In a first aspect, a clutch assembly is provided, comprising a coaxially arranged manual clutch, a clutch housing and an electric clutch, wherein the manual clutch is arranged inside the clutch housing, the electric clutch is arranged outside the clutch housing, the manual clutch comprises a first needle roller clutch assembly, and / or the electric clutch comprises a second needle roller clutch assembly.
[0006] By means of the above technical scheme, the utility model arranges the human clutch inside the clutch housing and the electric clutch outside the clutch housing. When clutching, human power locks the clutch housing from the inside to the outside, and electric power locks the clutch housing from the outside to the inside. In this way, the contact area between the human power one-way sleeve and the electric power one-way sleeve and the clutch housing can be increased, and the working surface of the clutch is increased, so that it can withstand greater torque and improve the clutch efficiency. By arranging a first needle roller clutch assembly and / or a second needle roller clutch assembly, the human power clutch and / or the electric power clutch have a faster response speed through the needle roller clutch, and the locking is faster when clutching, thereby improving the clutch sensitivity.
[0007] As a preferred embodiment of the above scheme, the manual clutch further comprises a manual drive head and a manual one-way sleeve, the manual drive head is driven to rotate by manpower, the manual one-way sleeve is sleeved on the outer wall of the manual drive head, the first needle roller clutch assembly is arranged between the manual drive head and the manual one-way sleeve, and the clutch housing is sleeved on the outer wall of the manual one-way sleeve and is fixedly connected to the manual one-way sleeve. According to the above scheme, when the manual power is output, the manual drive head is driven to rotate by manpower, the manual drive head locks the manual one-way sleeve through the first needle roller clutch assembly and drives the manual one-way sleeve to rotate, and the manual one-way sleeve drives the clutch housing to rotate.
[0008] As a preferred embodiment of the above scheme, the first needle roller clutch assembly is arranged on the manual one-way sleeve, the first needle roller clutch assembly includes a first clutch member and a first support member, the first clutch member includes a first needle roller, the first support member is arranged corresponding to the first clutch member, and the first support member is used to radially support the first needle roller. According to the above scheme, the first needle roller can only roll in a single direction in the gap between the manual one-way sleeve and the manual drive head, and cannot roll in the opposite direction, thereby achieving clutch; the first support member is used to bear the radial load of the first needle roller, prevent the manual drive head and the clutch housing from tilting and causing uneven bite, thereby ensuring the transmission of manual torque.
[0009] As a preferred embodiment of the above solution, the first support member includes a first needle roller bearing, the first needle roller bearing and the first needle roller are evenly distributed along the circumference of the human one-way sleeve, and the first needle roller bearing corresponds to the first needle roller one-to-one. According to the above solution, the first needle roller bearing can roll in both directions, and the first needle roller bearing is used to bear the radial load of the first needle roller to prevent uneven engagement caused by the tilt of the human drive head and the clutch housing, thereby ensuring the transmission of human torque.
[0010] As a preferred embodiment of the above scheme, the electric clutch further comprises an electric one-way sleeve, the electric one-way sleeve is driven to rotate by electricity, the electric one-way sleeve is sleeved on the outer wall of the clutch housing, and the second needle roller clutch assembly is arranged between the electric one-way sleeve and the clutch housing. According to the above scheme, when the electric power is output, the electric one-way sleeve is driven to rotate by electricity, and the electric one-way sleeve locks the clutch housing through the second needle roller clutch assembly and drives the clutch housing to rotate.
[0011] As a preferred embodiment of the above solution, the second needle roller clutch assembly is arranged on the electric one-way sleeve, the second needle roller clutch assembly includes a second clutch member, and the second clutch member includes a second needle roller. According to the above solution, the second needle roller can only roll in a single direction in the gap between the electric one-way sleeve and the clutch housing, and cannot roll in the opposite direction, thereby achieving clutch.
[0012] As a preferred embodiment of the above solution, the second needle roller clutch assembly further comprises a second support member, which is arranged on the side of the second clutch member and is used to radially support the second needle roller. According to the above solution, the second support member is used to bear the radial load of the second needle roller to prevent uneven engagement caused by the tilt of the electric one-way sleeve and the clutch housing, thereby ensuring the transmission of the electric torque.
[0013] As a preferred embodiment of the above solution, the second support member includes a second needle roller bearing, and the second needle roller bearing and the second needle roller are evenly distributed along the circumference of the electric one-way sleeve, and the second needle roller bearing corresponds to the second needle roller one-to-one. According to the above solution, the second needle roller bearing can roll in both directions, and the second needle roller bearing is used to bear the radial load of the second needle roller to prevent uneven engagement caused by the tilt of the electric one-way sleeve and the clutch housing, thereby ensuring the transmission of electric torque.
[0014] As a preferred embodiment of the above scheme, the clutch assembly further comprises a spline center shaft and a human-driven hollow shaft, wherein the human-driven hollow shaft is sleeved and connected to the spline center shaft, and the human-driven head is sleeved on the human-driven hollow shaft and is splined with the human-driven hollow shaft. According to the above scheme, under the action of manpower, the spline center shaft drives the human-driven hollow shaft to rotate, and the human-driven hollow shaft drives the human-driven head to rotate, thereby realizing the transmission of manpower to the human clutch.
[0015] As a preferred embodiment of the above scheme, the clutch assembly further comprises an electric drive plate, the electric drive plate is sleeved on the electric one-way sleeve and fixedly connected to the electric one-way sleeve, and the electric drive plate, the electric clutch, the clutch housing and the manual clutch are all coaxially arranged. According to the above scheme, under the action of electric power, the electric drive plate drives the electric one-way sleeve to rotate, thereby realizing the transmission of electric power to the electric clutch.
[0016] As a preferred embodiment of the above solution, the electric drive plate is interference fit with the electric one-way sleeve, and the clutch housing is interference fit with the human one-way sleeve. According to the above solution, the interference fit ensures that the electric drive plate effectively drives the electric one-way sleeve to rotate, and the human one-way sleeve effectively drives the clutch housing to rotate.
[0017] As a preferred embodiment of the above scheme, a bearing is provided between the electric drive plate and the human-driven hollow shaft, and a bearing and a retaining spring are provided between the spline sleeve and the spline center shaft. According to the above scheme, bearings are provided at corresponding rotation positions to ensure reliable rotation.
[0018] In a second aspect, a mid-mounted motor is provided, comprising the above-mentioned clutch assembly.
[0019] The above-mentioned mid-mounted motor also includes a gear disc bracket, a lock cover and a drive end cover. The drive end cover is arranged outside the clutch housing, and a bearing is arranged between the drive end cover and the clutch housing. The gear disc bracket is sleeved on the outside of the clutch housing and cooperates with the clutch housing spline. The clutch housing drives the gear disc bracket to rotate. A plurality of gear discs are arranged on the gear disc bracket. The gear discs are connected to a chain to form a power output load. The lock cover is arranged on the gear disc bracket and sleeved on the spline center axis.
[0020] In a third aspect, a power-assisted vehicle is provided, comprising the above-mentioned mid-mounted motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0022] Figure 1 It is a structural schematic diagram of embodiment 1;
[0023] Figure 2 for Figure 1 A schematic diagram of the structure from above after the electric drive board is hidden;
[0024] Figure 3 for Figure 1 A schematic diagram of the structure viewed from above after the electric drive board is hidden;
[0025] Figure 4 This is a schematic diagram of the structure of the human-powered one-way sleeve in the first embodiment;
[0026] Figure 5 This is a schematic diagram of the structure of the electric one-way sleeve in the first embodiment;
[0027] Figure 6 This is a schematic diagram of the structure of Embodiment 3;
[0028] Figure 7 for Figure 6 Schematic diagram of the structure viewed from above. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] Embodiment 1
[0031] refer to Figures 1 to 5 The utility model provides a clutch assembly, including a coaxially arranged human clutch 1, a clutch housing 2 and an electric clutch 3, wherein the human clutch 1 is arranged in the clutch housing 2, and the electric clutch 3 is arranged outside the clutch housing 2, the human clutch 1 includes a first needle roller clutch assembly 13, and / or the electric clutch 3 includes a second needle roller clutch assembly 32.
[0032] The manual clutch 1 further comprises a manual drive head 11 and a manual one-way sleeve 12, wherein the manual drive head 11 is driven to rotate by manpower, the manual one-way sleeve 12 is sleeved on the outer wall of the manual drive head 11, the first needle roller clutch assembly 13 is arranged between the manual drive head 11 and the manual one-way sleeve 12, and the clutch housing 2 is sleeved on the outer wall of the manual one-way sleeve 12 and is fixedly connected to the manual one-way sleeve 12. When the manual power is output, the manual drive head 11 is driven to rotate by manpower, the manual drive head 11 locks the manual one-way sleeve 12 through the first needle roller clutch assembly 13 and drives the manual one-way sleeve 12 to rotate, and the manual one-way sleeve 12 drives the clutch housing 2 to rotate. The first needle roller clutch assembly 13 is arranged on the human one-way sleeve 12, and the first needle roller clutch assembly 13 includes a first clutch member 131 and a first support member 132. The first clutch member 131 includes a first needle roller 1311, a first retaining frame (not shown), a first spring sheet (not shown) and a first wedge-shaped groove (not shown). The first retaining frame is arranged on the human one-way sleeve 12, and the first needle roller 1311 is evenly distributed along the circumference of the human one-way sleeve 12. The first wedge-shaped groove is arranged on the inner wall of the human one-way sleeve 12, and the first support member 132 is arranged on the side of the first clutch member 131. , wherein the first support member 132 can be arranged on one side or both sides of the first clutch member 131 along the axial direction of the first needle roller 1311. In this embodiment, considering the space factor, the first clutch member 131 is provided with a first support member 132 on one side along the axial direction of the first needle roller 1311, and the first support member 132 includes a first needle roller bearing 1321 and a first retaining frame (not shown), and the first retaining frame is arranged on the manual one-way sleeve 12, and the first needle roller bearing 1321 is evenly distributed along the circumference of the manual one-way sleeve 12, and the first wedge groove and the first needle roller bearing 1321 correspond to the first needle roller 1311 one by one. The axial directions of the first needle roller 1311 and the first needle roller bearing 1321 are arranged parallel to the axial direction of the human one-way sleeve 12, the length of the first needle roller 1311 is greater than the length of the first needle roller bearing 1321, the first needle roller 1311 and the first spring sheet are arranged on the first retaining frame, the first retaining frame and the first spring sheet are used to support the first needle roller 1311, the first needle roller 1311 cooperates with the first wedge groove so that the first needle roller 1311 can only roll in a single direction in the gap between the human one-way sleeve 12 and the human drive head 11, and cannot roll in the opposite direction, thereby realizing clutch, needle roller clutch is a prior art, and its working principle is not repeated here; the first support member 132 is used to bear the radial load of the first needle roller 1311, prevent the uneven bite caused by the tilt of the human drive head 11 and the clutch housing 2, thereby ensuring the transmission of human torque, wherein the first needle roller bearing 1321 can roll in both directions.
[0033] The electric clutch 3 further comprises an electric one-way sleeve 31, which is driven to rotate by electric power. The electric one-way sleeve 31 is sleeved on the outer wall of the clutch housing 2, and the second needle roller clutch assembly 32 is arranged between the electric one-way sleeve 31 and the clutch housing 2. When the electric power is output, the electric one-way sleeve 31 is driven to rotate by electric power, and the electric one-way sleeve 31 locks the clutch housing 2 through the second needle roller clutch assembly 32 and drives the clutch housing 2 to rotate. The second needle roller clutch assembly 32 comprises a second clutch member (not shown), which comprises a second needle roller 3211, a second retaining frame (not shown), a second spring sheet (not shown) and a second wedge groove (not shown), the second retaining frame is arranged on the electric one-way sleeve 31, the second needle roller 3211 is evenly distributed along the circumference of the electric one-way sleeve 31, and the second wedge groove is arranged on the inner wall of the electric one-way sleeve 31. The second needle roller 3211 and the second spring sheet are arranged on the second retaining frame, and the second retaining frame and the second spring sheet are used to support the second needle roller 3211. The second needle roller 3211 cooperates with the second wedge-shaped groove so that the second needle roller 3211 can only roll in a single direction in the gap between the power one-way sleeve 31 and the clutch housing 2, and cannot roll in the opposite direction, thereby realizing clutch.
[0034] The clutch assembly also includes a spline center shaft 4 and a human-driven hollow shaft 5, wherein the human-driven hollow shaft 5 is sleeved and connected to the spline center shaft 4, and the human-driven head 11 is sleeved on the human-driven hollow shaft 5 and splined with the human-driven hollow shaft 5. Under the action of manpower, the spline center shaft 4 drives the human-driven hollow shaft 5 to rotate, and the human-driven hollow shaft 5 drives the human-driven head 11 to rotate, so that manpower is transmitted to the human clutch 1. The clutch assembly also includes an electric drive plate 6, which is sleeved on the electric one-way sleeve 31 and fixedly connected to the electric one-way sleeve 31, and the electric drive plate 6, the electric clutch 3, the clutch housing 2 and the human clutch 1 are all coaxially arranged. Under the action of electric power, the electric drive plate 6 drives the electric one-way sleeve 31 to rotate, so that electric power is transmitted to the electric clutch 3. The electric drive plate 6 is interference-fitted with the electric one-way sleeve 31, and the clutch housing 2 is interference-fitted with the human one-way sleeve 12. The interference fit ensures that the electric drive plate 6 effectively drives the electric one-way sleeve 31 to rotate, and the human one-way sleeve 12 effectively drives the clutch housing 2 to rotate. A bearing (not shown) is provided between the electric drive plate 6 and the human drive hollow shaft 5, and a bearing (not shown) and a retaining spring (not shown) are provided between the spline sleeve and the spline center shaft. Bearings are provided at corresponding rotation positions to ensure reliable rotation. The bearings in this embodiment are deep groove ball bearings.
[0035] The utility model arranges the human clutch 1 inside the clutch housing 2 and the electric clutch 3 outside the clutch housing 2. When the clutch is engaged, human power locks the clutch housing 2 from the inside to the outside, and electric power locks the clutch housing 2 from the outside to the inside. In this way, the contact area between the human one-way sleeve 12 and the electric one-way sleeve 31 and the clutch housing 2 is increased, and the working surface of the clutch is increased, so that it can withstand a larger torque and improve the clutch efficiency. By arranging a first needle roller clutch assembly 13 between the human drive head 11 and the human one-way sleeve 12, and / or arranging a second needle roller clutch assembly 32 between the electric one-way sleeve 31 and the clutch housing 2, the human clutch 1 and / or the electric clutch 3 have a faster response speed through the needle roller clutch, and the locking is faster when the clutch is engaged, thereby improving the clutch sensitivity. The locking response time of the existing ratchet type clutch is about 400-600ms, and the locking response time of the human clutch 1 and the electric clutch 3 of the utility model is less than 200ms.
[0036] Embodiment 2
[0037] The utility model provides a clutch assembly, most of the structures of the clutch assembly are the same as those of the first embodiment, wherein the second needle roller clutch assembly 32 further includes a second support member (not shown), the second support member is arranged on the side of the second clutch member, and the second support member is used to radially support the second needle roller 3211. The second support member is used to bear the radial load of the second needle roller 3211, prevent the electric power one-way sleeve 31 and the clutch housing 2 from being tilted and causing uneven bite, thereby ensuring the transmission of electric power torque. The second support member includes a second needle roller bearing and a second retaining frame, the second retaining frame is arranged on the electric power one-way sleeve 31, the second needle roller bearing and the second needle roller 3211 are evenly distributed along the circumference of the electric power one-way sleeve 31, the second needle roller bearing corresponds to the second needle roller one-to-one, the axial direction of the second needle roller 3211 and the second needle roller bearing is arranged parallel to the axial direction of the electric power one-way sleeve 31, and the length of the second needle roller 3211 is greater than the length of the second needle roller bearing. The second needle bearing can roll in both directions and is used to bear the radial load of the second needle roller 3211 to prevent uneven engagement caused by the tilt of the electric one-way sleeve 31 and the clutch housing 2, thereby ensuring the transmission of the electric torque.
[0038] Embodiment 3
[0039] The utility model provides a mid-mounted motor, comprising the clutch assembly of the second embodiment.
[0040] refer to Figure 6 to Figure 7The above-mentioned central motor also includes a gear disc bracket 7, a lock cover 8 and a drive end cover 9. The drive end cover 9 is arranged outside the clutch housing 2. A bearing (not shown) is arranged between the drive end cover 9 and the clutch housing 2. The bearing in this embodiment is a deep groove ball bearing. The gear disc bracket 7 is sleeved on the outside of the clutch housing 2 and is splined with the clutch housing 2. The clutch housing 2 drives the gear disc bracket 7 to rotate. A plurality of gear discs (not shown) are arranged on the gear disc bracket 7. The gear discs are connected to the chain to form a power output load. The lock cover 8 is arranged on the gear disc bracket 7 and sleeved on the spline center shaft 4.
[0041] Embodiment 4
[0042] The utility model provides a power-assisted vehicle, comprising the central motor of the third embodiment.
[0043] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.
[0044] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A clutch assembly, characterized in that: It comprises a coaxially arranged human clutch, a clutch housing and an electric clutch, wherein the human clutch is arranged in the clutch housing, the electric clutch is arranged outside the clutch housing, the human clutch comprises a first roller clutch assembly, and / or the electric clutch comprises a second roller clutch assembly; The manual clutch further comprises a manual drive head and a manual one-way sleeve, wherein the manual drive head is driven to rotate by manual power, the manual one-way sleeve is sleeved on the outer wall of the manual drive head, the first needle roller clutch assembly is arranged between the manual drive head and the manual one-way sleeve, and the clutch housing is sleeved on the outer wall of the manual one-way sleeve and fixedly connected to the manual one-way sleeve; The first needle roller clutch assembly is arranged on the manpower one-way sleeve, the first needle roller clutch assembly comprises a first clutch member, and the first clutch member comprises a first needle roller; The electric clutch further comprises an electric one-way sleeve, which is driven to rotate by electric power, and the electric one-way sleeve is sleeved on the outer wall of the clutch housing, and the second needle roller clutch assembly is arranged between the electric one-way sleeve and the clutch housing; The second needle roller clutch assembly includes a second clutch member, and the second clutch member includes a second needle roller.
2. The clutch assembly according to claim 1, characterized in that: The first needle roller clutch assembly further includes a first support member, which is disposed corresponding to the first clutch member and is used for providing radial support to the first needle roller.
3. The clutch assembly according to claim 2, characterized in that: The first support member includes a first needle roller bearing. The first needle roller bearing and the first needle roller are evenly distributed along the circumference of the human-powered one-way sleeve. The first needle roller bearing corresponds to the first needle roller one-to-one.
4. The clutch assembly according to claim 1, characterized in that: The second needle roller clutch assembly is arranged on the electric one-way sleeve.
5. The clutch assembly according to claim 1, characterized in that: The second needle roller clutch assembly also includes a second support member, which is arranged on the side of the second clutch member and is used to provide radial support for the second needle roller.
6. The clutch assembly according to claim 5, characterized in that: The second support member includes a second needle roller bearing, the second needle roller bearing and the second needle roller are evenly distributed along the circumference of the power one-way sleeve, and the second needle roller bearing corresponds to the second needle roller one-to-one.
7. A mid-mounted motor, characterized in that: Comprising a clutch assembly as described in any one of claims 1-6.
8. A power-assisted vehicle, characterized in that: Comprising the mid-mounted motor as described in claim 7.