Easily-assembled wheel hub motor end cover clamping base connecting mechanism

Abstract

The utility model discloses a hub motor end cover clamping base connecting mechanism easy to assemble, which comprises a hub motor and a clamping base assembled on a support shaft of the hub motor, and the clamping base is positioned on the outer side of a detachable end cover of the hub motor and is supported on the support shaft through a plurality of clamping base bearings on the inner side. A bearing seat is arranged on the inner side of a shaft hole of the end cover so as to fixedly support a hub bearing on the supporting shaft; the utility model is characterized in that an annular insert is fixed on the inner circumference of the shaft hole of the end cover in a die-casting manner, the inner circumference of the annular insert is fixedly connected with the outer circumference of the bearing seat through a left-hand thread, an extension sleeve extending into the clamping base is formed on the bearing seat, and the extension sleeve is connected with the clamping base through a ratchet and pawl type one-way clutch. According to the ratchet and pawl one-way clutch, the bearing seat is fixedly connected with the annular insert on the inner circumference of the end cover through the left-hand threads, compared with a traditional screw fixing mode, assembling operation is more convenient, the concentricity between the bearing seat and the clamping base can be guaranteed, and therefore the installation quality and smooth operation of the ratchet and pawl one-way clutch are guaranteed.

Description

Technical Field

[0001] The utility model relates to an easy-to-assemble hub motor end cover clamping base connecting mechanism. Background Art

[0002] At present, electric bicycles with multi-speed transmission function are all provided with a card base to transmit the power of the hub motor to the multi-stage flywheel thereon. This card base is mainly assembled on the support shaft of the hub motor, axially locked to the outer side of the detachable end cover of the hub motor by a locking nut, and connected to the end cover through a ratchet pawl one-way clutch, thereby forming an end cover card base connection mechanism. The ratchet pawl one-way clutch can be split into a ratchet and a pawl cooperating with the ratchet.

[0003] In the existing end cover and base connection mechanism, the base is supported on the support shaft of the hub motor through the base bearing on the inner side, and a bearing seat is fixed to the inner side of the detachable end cover of the hub motor through screws, and the hub bearing is arranged in the bearing seat to support the support shaft. For the convenience of loading and unloading, the bearing seat has an extension sleeve extending from the shaft hole of the hub end cover and extending into the inner side of one end of the base, and the base and the extension sleeve are connected and matched through a ratchet pawl one-way clutch, so that when the base is removed, the pawl in the one-way clutch can be disengaged relative to the ratchet axial direction, so that the pawl can be easily cleaned.

[0004] However, the existing hub motor end cover card base connection mechanism exposes the following problems in production:

[0005] Since the bearing seat on the inner side of the end cover is locked with the end cover by a circle of multiple screws during assembly, it is difficult to control and ensure the concentricity between the bearing seat and the base due to deformation and error after tightening each screw. This can easily cause the ratchet (or pawl) on the bearing seat and the pawl (or ratchet) on the base to not fit well, affecting the smoothness of the one-way clutch, generating noise, and even causing damage to parts in severe cases.

[0006] Therefore, the current hub motor end cover clamping base connection mechanism often takes a long time to assemble and calibrate during production, which is difficult to assemble and inefficient. The industry is in urgent need of an easy-to-assemble end cover clamping base connection mechanism that can ensure the concentricity between the bearing seat and the clamping base. Summary of the invention

[0007] The utility model aims to provide an easy-to-assemble hub motor end cover clamping base connection mechanism, which can ensure the concentricity of the bearing seat and the clamping base during assembly, thereby ensuring the installation quality and smooth operation of the ratchet pawl one-way clutch.

[0008] The technical solution of the utility model is: an easy-to-assemble hub motor end cover card base connection mechanism, comprising a hub motor and a card base assembled on the support shaft of the hub motor, the card base is located on the outer side of the detachable end cover of the hub motor and is supported on the support shaft through a plurality of card base bearings on the inner side, and a bearing seat is provided on the inner side of the shaft hole of the end cover to fix the hub bearing supported on the support shaft; it is characterized in that an annular insert is die-cast and fixed on the inner periphery of the shaft hole of the end cover, the inner periphery of the annular insert is fixed to the outer periphery of the bearing seat by a reverse thread connection, an extension sleeve extending into the card base is formed on the bearing seat, and the extension sleeve and the card base are connected by a ratchet pawl type one-way clutch.

[0009] Furthermore, the ratchet and pawl one-way clutch described in the utility model includes a ratchet and a pawl cooperating therewith, wherein the ratchet is fixed on the inner side of the base, and the pawl is fixed on the extension sleeve and can be axially disengaged relative to the ratchet; or the pawl is fixed on the inner side of the base, and the ratchet is fixed on the extension sleeve and can be axially disengaged relative to the pawl.

[0010] Furthermore, the outer periphery of the card base in the utility model is covered with a sealing ring, and the outer periphery of the sealing ring abuts against the inner periphery of the annular insert. The setting of the sealing ring can provide good waterproof and dustproof functions for the ratchet and pawl that cooperate with each other between the bearing seat and the card base.

[0011] Furthermore, a circle of inner stop edge is formed on the inner circumference of the annular insert in the utility model, close to the outer end of the end cover, and the inner circumference of the inner stop edge is against the outer circumference of the sealing ring; the bearing seat is located on the inner side of the inner stop edge, and is screwed from the inside to the outside with the annular insert through a reverse thread and stops on the inner stop edge.

[0012] Furthermore, in the utility model, an outer retaining edge is formed on the outer periphery of one end of the card base close to the bearing seat to retain the outer side of the sealing ring. The setting of the outer retaining edge can prevent the sealing ring from being exposed and damaged.

[0013] Furthermore, in the utility model, two said card base bearings are fixed on the inner side of the card base, which are the first card base bearing and the second card base bearing, wherein the first card base bearing is located between the wheel hub bearing and the second card base bearing along the axial direction of the support shaft, the ratchet pawl type one-way clutch is located between the wheel hub bearing and the first card base bearing, the first card base bearing is abutted against the wheel hub bearing through a locking sleeve sleeved on the support shaft, the extension sleeve is sleeved on the locking sleeve, and the inner end of the second card base bearing is abutted against the first card base bearing through a locking sleeve sleeved on the support shaft, and the outer end is abutted against the retaining spring fixed on the inner circumference of the card base, and at the same time, the second card base bearing is axially locked by a locking nut screwed on the support shaft.

[0014] Furthermore, a waterproof gasket is provided between the inner periphery of the card base and the outer periphery of the locking nut. The waterproof gasket is located outside the second card base bearing. The provision of the waterproof gasket can provide better waterproof and dustproof functions for the inner side of the card base.

[0015] The advantages of the utility model are:

[0016] 1. The easy-to-assemble hub motor end cover card base connection mechanism provided by the utility model has an annular insert arranged on the inner periphery of the end cover, so that the bearing seat and the annular insert on the inner periphery of the end cover are connected and fixed by reverse thread. During assembly, the bearing seat can be directly screwed and fixed to the end cover. Compared with the traditional screw fixing method, it not only makes the assembly operation between the bearing seat and the end cover more convenient, but also can ensure the concentricity between the bearing seat and the card base, so that the pawl and ratchet in the ratchet pawl one-way clutch can be reliably matched, thereby ensuring the installation quality and smooth operation of the ratchet pawl one-way clutch. And because there is no need to repeatedly assemble and calibrate the concentricity when assembling the bearing seat as in the prior art, it can improve assembly efficiency and save work time.

[0017] 2. In the utility model, the bearing seat and the annular insert are screwed and fixed to the inner side of the end cover from inside to outside through reverse thread, and the front of the bearing seat is stopped on the inner stop edge of the annular insert, which can provide good positioning protection for the bearing seat.

[0018] 3. The outer periphery of the card base in the utility model is covered with a sealing ring, and the outer periphery of the sealing ring is against the inner periphery of the annular insert. The setting of the sealing ring can provide good waterproof and dustproof functions for the ratchet and pawl that cooperate with each other between the bearing seat and the card base. In addition, a circle of outer retaining edge is formed on the outer periphery of one end of the card base close to the bearing seat to block the outer side of the sealing ring. The setting of the outer retaining edge can further protect the sealing ring from being exposed and damaged.

[0019] 4. The overall assembly structure of the utility model is also very convenient for disassembly of the card base. You only need to unscrew the locking nut at one end of the card base to axially disengage the ratchet (or ratchet) set at the other end of the card base from the ratchet (or ratchet) on the bearing seat to disassemble the card base. The operation is very convenient, which provides great convenience for the maintenance and replacement of the card base and greatly improves the maintenance and replacement efficiency of the card base. And because the ratchet can be easily axially disengaged from the ratchet, there is no need to remove the ratchet-pawl one-way clutch as a whole by removing the end cover, avoiding contamination of the inside of the hub motor; also because the ratchet can be easily axially disengaged from the ratchet, it is extremely convenient to clean the ratchet separately, thereby increasing the cleaning frequency of the ratchet, which is conducive to improving the working reliability of the ratchet-pawl one-way clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0021] Figure 1 It is a structural cross-sectional view of the utility model;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the assembly of the annular insert and the end cover;

[0023] Figure 3 It is a schematic diagram of the assembled three-dimensional structure of the annular insert, the end cover and the bearing seat;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the card base (including the card base bearing and ratchet).

[0025] Among them: 1. Hub motor; 101. End cover; 2. Support shaft; 3. Base; 301. Outer stopper; 4. Base bearing; 401. First base bearing; 402. Second base bearing; 5. Bearing seat; 501. Extension sleeve; 6. Hub bearing; 7. Ring insert; 701. Inner stopper; 8. Reverse thread; 9. Ratchet; 10. Paw; 11. Sealing ring; 12. Locking sleeve; 13. Tightening sleeve; 14. Retaining spring; 15. Locking nut; 16. Waterproof gasket. DETAILED DESCRIPTION

[0026] Example: The following combination Figure 1~Figure 4 The specific implementation of the easy-to-assemble hub motor end cover card base connection mechanism provided by the utility model is described as follows:

[0027] This easy-to-assemble hub motor end cover card base connection mechanism is the same as the known technology. It includes a hub motor 1 and a card base 3 assembled on the support shaft 2 of the hub motor 1, the card base 3 is located on the outside of the detachable end cover 101 of the hub motor 1 and is supported on the support shaft 2 through two inner card base bearings 4. The inner side of the shaft hole of the end cover 101 is provided with a bearing seat 5 to fix the hub bearing 6 supported on the support shaft 2. The core improvement of the utility model is that an annular insert 7 is die-casted and fixed on the inner periphery of the shaft hole of the end cover 101, and the inner periphery of the annular insert 7 is connected and fixed to the outer periphery of the bearing seat 5 by a reverse thread 8. The bearing seat 5 is formed with an extension sleeve 501 extending into the card base 3, and the extension sleeve 501 is connected to the card base 3 by a ratchet pawl one-way clutch. The ratchet pawl one-way clutch is composed of a ratchet 9 and a pawl 10 matched therewith, wherein the ratchet 9 is fixed on the inner side of the card base 3, and the pawl 9 is fixed on the extension sleeve 501 and can be axially disengaged from the ratchet 9. Figure 3 and Figure 4 shown.

[0028] In this embodiment, the outer periphery of the card base 3 is covered with a sealing ring 11, and the outer periphery of the sealing ring 11 abuts against the inner periphery of the annular insert 7. The setting of the sealing ring 11 can provide good waterproof and dustproof functions for the ratchet 9 and the ratchet pawl 10 that cooperate with each other between the bearing seat 5 and the card base 3.

[0029] Further integration Figure 1~Figure 3 As shown, in this embodiment, the inner circumference of the annular insert 7 is formed with an inner stop edge 701 near the outer end of the end cover 101, and the inner circumference of the inner stop edge 701 abuts against the outer circumference of the sealing ring 11; the bearing seat 5 is located inside the inner stop edge 701, and is screwed from inside to outside with the annular insert 7 through the reverse thread 8 and abuts against the inner stop edge 701. The outer circumference of the end of the base 3 near the bearing seat 5 is formed with an outer stop edge 301 that blocks the outer side of the sealing ring 11.

[0030] Still like Figure 1 As shown, the two card base bearings 4 on the inner side of the card base 3 in this embodiment are respectively the first card base bearing 401 and the second card base bearing 402, wherein the first card base bearing 401 is located between the hub bearing 6 and the second card base bearing 402 along the axial direction of the support shaft 2, the ratchet pawl type one-way clutch is located between the hub bearing 6 and the first card base bearing 401, the first card base bearing 401 is abutted against the hub bearing 6 through the locking sleeve 12 sleeved on the support shaft 2, the extension sleeve 501 is sleeved on the locking sleeve 12, and the inner end of the second card base bearing 402 is abutted against the first card base bearing 401 through the locking sleeve 13 sleeved on the support shaft 2, and the outer end is abutted against the retaining spring 14 fixed on the inner periphery of the card base 3, and the second card base bearing 402 is axially locked by the locking nut 15 screwed on the support shaft 2.

[0031] In this embodiment, a waterproof gasket 16 is provided between the inner periphery of the card base 3 and the outer periphery of the locking nut 15, and the waterproof gasket 16 is located outside the second card base bearing 402. The provision of the waterproof gasket 16 can provide a better waterproof and dustproof function for the inner side of the card base 3.

[0032] The easy-to-assemble hub motor end cover card base connection mechanism provided by the utility model has an annular insert 7 arranged on the inner periphery of the end cover 101, so that the bearing seat 5 and the annular insert on the inner periphery of the end cover 101 are connected and fixed through the reverse thread 8. During assembly, the bearing seat 5 can be directly screwed and fixed to the end cover 101. Compared with the traditional screw fixing method, it not only makes the assembly operation between the bearing seat 5 and the end cover 101 more convenient, but also can ensure the concentricity between the bearing seat 5 and the card base 3, so that the pawl 10 and the ratchet 9 in the ratchet pawl one-way clutch can be reliably matched, thereby ensuring the installation quality and smooth operation of the ratchet pawl one-way clutch. And because there is no need to repeatedly assemble and calibrate the concentricity when assembling the bearing seat 5 as in the prior art, it can improve the assembly efficiency and save work time.

[0033] Moreover, in the utility model, the bearing seat 5 and the annular insert 7 are screwed and fixed to the inner side of the end cover 101 from the inside to the outside through the reverse thread 8, and the front of the bearing seat 5 is stopped on the inner stop edge 701 of the annular insert 7, which can provide good positioning protection for the bearing seat 5.

[0034] Of course, the above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any modifications made according to the spirit of the main technical solution of the utility model should be included in the protection scope of the utility model.

Claims

1. An easily assembled hub motor end cover and base connection mechanism, comprising a hub motor (1) and a base (3) assembled on a support shaft (2) of the hub motor (1), the base (3) being located outside a detachable end cover (101) of the hub motor (1) and supported on the support shaft (2) by a plurality of base bearings (4) inside, a bearing seat (5) being provided inside a shaft hole of the end cover (101) to fix a hub bearing (6) supported on the support shaft (2); characterized in that An annular insert (7) is die-cast and fixed on the inner periphery of the shaft hole of the end cover (101); the inner periphery of the annular insert (7) is connected and fixed to the outer periphery of the bearing seat (5) via a reverse thread (8); an extension sleeve (501) is formed on the bearing seat (5) and extends into the card base (3); the extension sleeve (501) and the card base (3) are connected via a ratchet pawl type one-way clutch.

2. The easily assembled hub motor end cover card-base connection mechanism according to claim 1, characterized in that The ratchet-pawl one-way clutch comprises a ratchet (9) and a pawl (10) matched therewith, wherein the ratchet (9) is fixed on the inner side of the card base (3), and the pawl (10) is fixed on the extension sleeve (501) and can be axially disengaged from the ratchet (9); or the pawl (10) is fixed on the inner side of the card base (3), and the ratchet (9) is fixed on the extension sleeve (501) and can be axially disengaged from the pawl (10).

3. The easily assembled hub motor end cover card-base connection mechanism according to claim 1, characterized in that A sealing ring (11) is sleeved on the outer periphery of the card base (3), and the outer periphery of the sealing ring (11) abuts against the inner periphery of the annular insert (7).

4. The easily assembled hub motor end cover card-base connection mechanism according to claim 3 is characterized in that An inner stop edge (701) is formed on the inner periphery of the annular insert (7) near the outer end of the end cover (101), and the inner periphery of the inner stop edge (701) abuts against the outer periphery of the sealing ring (11); the bearing seat (5) is located on the inner side of the inner stop edge (701), and is screwed from the inside to the outside with the annular insert (7) through a reverse thread (8) and abuts against the inner stop edge (701).

5. The easily assembled hub motor end cover clamping base connection mechanism according to claim 3, characterized in that An outer stop edge (301) is formed on the outer periphery of one end of the base (3) close to the bearing seat (5) and blocks the outer side of the sealing ring (11).

6. The easily assembled hub motor end cover card-base connection mechanism according to claim 1, characterized in that Two of the card base bearings (4) are fixed on the inner side of the card base (3), namely a first card base bearing (401) and a second card base bearing (402), wherein the first card base bearing (401) is located between the wheel hub bearing (6) and the second card base bearing (402) along the axial direction of the support shaft (2), the ratchet pawl type one-way clutch is located between the wheel hub bearing (6) and the first card base bearing (401), and the first card base bearing (401) is sleeved on the support shaft (2). The locking sleeve (12) of the second base bearing (402) is against the wheel hub bearing (6), the extension sleeve (501) is sleeved on the locking sleeve (12), and the inner end of the second base bearing (402) is against the first base bearing (401) through the locking sleeve (13) sleeved on the support shaft (2), while the outer end is against the retaining spring (14) fixed on the inner periphery of the base (3), and the second base bearing (402) is axially locked by a locking nut (15) screwed on the support shaft (2).

7. The easily assembled hub motor end cover clamping base connection mechanism according to claim 6, characterized in that A waterproof gasket (16) is provided between the inner periphery of the base (3) and the outer periphery of the locking nut (15), and the waterproof gasket (16) is located outside the second base bearing (402).

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