CN219145173U

CN219145173U - Easy-to-detach type connecting structure of hub motor and tower foundation

Info

Publication number: CN219145173U
Application number: CN202223503840.9U
Authority: CN
Inventors: 温群峰
Original assignee: Suzhou Shengyi Motor Co ltd
Current assignee: Suzhou Shengyi Motor Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-06-06
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses an easily-detachable connecting structure of a hub motor and a tower foundation, which comprises the hub motor and the tower foundation which are assembled on a supporting shaft, wherein the tower foundation is positioned at the outer side of a detachable end cover of the hub motor and is axially locked by a locking nut which is arranged on the supporting shaft and is positioned at one end of the tower foundation, which is opposite to the end cover; the end cover is arranged on the supporting shaft through an end cover bearing fixed in the shaft hole of the end cover, and the tower foundation is connected with the end cover through a ratchet wheel and pawl type one-way clutch, wherein the one-way clutch comprises a ratchet wheel ring and pawls matched with the ratchet wheel ring; the ratchet wheel ring positioning concave table is formed on the end cover around the shaft hole of the end cover, the ratchet wheel ring is fixed on the inner periphery of the ratchet wheel ring positioning concave table, the pawl positioning sleeve which is sleeved on the supporting shaft and stretches into the ratchet wheel ring positioning concave table is formed at one end of the tower foundation, which faces the end cover, and pawls which can be separated relative to the ratchet wheel ring in the axial direction are fixed on the pawl positioning sleeve. The utility model can solve the problem that the tower foundation is not easy to detach, is convenient for the tower foundation to detach, is convenient for the pawl to separate from the ratchet ring, and is convenient for the pawl to clean.

Description

Easy-to-detach type connecting structure of hub motor and tower foundation

Technical Field

The utility model relates to an easy-to-detach connection structure of a hub motor and a tower foundation.

Background

The tower foundation is a core transmission component used for transmitting the power of the hub motor to the multistage flywheel on the current electric bicycle with the multistage speed change function, is usually assembled on a supporting shaft of the hub motor, is axially locked to the outer side of a detachable end cover of the hub motor by adopting a locking nut, and is connected with the hub motor through a one-way clutch. In the prior art, the tower foundation further comprises a tower foundation body and a tower foundation bearing fixed on the inner side of the tower foundation body, the outer periphery of the tower foundation body is used for installing a multi-stage flywheel, and most of the one-way clutches are ratchet pawl one-way clutches which are composed of ratchet rings and pawls matched with ratchet grooves on the inner periphery of the ratchet rings.

The connection structure of the tower foundation and the end cover of the hub motor, which are commonly used in the market, is usually that a flange plate is fixed on the inner side of the end cover of the hub motor through bolts, the flange plate is provided with an extension sleeve extending out of the axle hole of the end cover of the hub and extending into the tower basic body, the tower basic body is supported and arranged on the extension sleeve through two tower foundation bearings on the inner side, the tower foundation body is connected with the extension sleeve through a ratchet-pawl type one-way clutch, and the ratchet-pawl type one-way clutch is often clamped between the two tower foundation bearings. Although this connection structure has a compact design advantage, the following problems are exposed in practical use:

1) Because the ratchet pawl type one-way clutch is locked between the two tower foundation bearings, the pawl and the ratchet ring cannot be easily and axially separated, and therefore, when the tower foundation is required to be disassembled for maintenance and replacement, the ratchet pawl type one-way clutch is required to be disassembled together. However, the ratchet pawl type one-way clutch is limited by the flange plate, and the flange plate must be detached firstly, however, because the flange plate is fixed on the inner side of the end cover of the hub motor through screws for waterproofing, the end cover of the hub motor also needs to be opened firstly, the process is tedious, and great inconvenience is brought to the disassembly, assembly and replacement of the whole tower foundation. And for the hub motor, once the end cover is opened, the risk of water entering to pollute the internal movement components exists.

2) For the ratchet-pawl type one-way clutch of the tower foundation, oil dirt and dust are easy to enter a pawl clearance in use, so that the one-way clutch needs to be periodically disassembled and cleaned. However, in the present tower base mounting structure, the ratchet-pawl type one-way clutch is locked between two tower base bearings, and the pawl is usually fixed on the extending sleeve of the flange. Because the pawls cannot be easily and axially disengaged from the ratchet ring due to the limitation of the tower bearings on both sides, the ratchet-pawl one-way clutch can hardly be easily disassembled to perform independent cleaning on the pawls. The tower foundation with the ratchet wheel and pawl type one-way clutch is usually only removed integrally, and then pawls and ratchet wheel rings in the tower foundation are detached and cleaned, so that the operation is very inconvenient.

3) Of course, in the design of the connection structure of the hub motor and the tower foundation, the flange plate and the end cover of the hub motor are integrally designed, which obviously also causes the problem that the ratchet pawl type one-way clutch and the end cover must be combined for dismounting when the tower foundation is dismounted, and also causes the internal pollution of the hub motor. In the structure, because the external structure of the end cover of the hub motor is designed by matching with the fixed pawl, when the tower foundation and the matched ratchet pawl type one-way clutch are required to be replaced, the end cover of the hub motor is required to be replaced together, and the manufacturing and using cost of the hub motor is increased.

In addition, in the existing connection structure of the tower footing and the end cover of the hub motor, the inner periphery of the shaft hole of the hub motor is sleeved on the extending sleeve of the flange plate, and the inner side of the extending sleeve is supported and arranged on the supporting shaft of the hub motor through the end cover bearing. Therefore, the end cover bearing has the effect of simultaneously supporting the end cover (hub motor) and the tower foundation (comprising the multi-stage flywheel), the load on the end cover bearing is very large, the strength requirement on the end cover bearing is greatly improved, the corresponding bearing loss is also greatly increased, and the production cost and the maintenance cost of the end cover bearing are both correspondingly increased. In fact, the bearing stability of the two-sided structure is poor in practice through the single bearing loading of the hub motor end cover and the tower foundation.

In the prior art, in order to enhance the supporting strength of the end cover bearing, the diameter of the end cover bearing is often increased, and in order to adapt to the bearing, a bracket is often required to be additionally arranged on the inner side of the hub motor to bear the end cover bearing, instead of directly bearing the end cover bearing by a supporting shaft, so that the radial size of the hub motor must be correspondingly adjusted, the radial size of the whole hub motor is finally not optimized, and the production cost is correspondingly increased.

Disclosure of Invention

The utility model aims at: the utility model provides a wheel hub motor and easy-to-detach connection structure of tower foundation, it can solve the difficult problem of tower foundation dismantlement, not only is convenient for tower foundation dismantlement, also is convenient for the disconnection separation of pawl and ratchet ring in the ratchet pawl formula one-way clutch, makes things convenient for the pawl to wash.

The technical scheme of the utility model is as follows: the easy-to-detach type connection structure of the hub motor and the tower foundation comprises the hub motor and the tower foundation which are assembled on a supporting shaft, wherein the tower foundation is positioned on the outer side of a detachable end cover of the hub motor and is axially locked by a locking nut which is arranged on the supporting shaft and is positioned at one end of the tower foundation, which is opposite to the end cover; the end cover is assembled on the supporting shaft through an end cover bearing fixed in the shaft hole of the end cover, and the tower foundation is connected with the end cover through a ratchet-pawl type one-way clutch, wherein the ratchet-pawl type one-way clutch comprises a ratchet ring and pawls matched with the ratchet ring; the ratchet wheel ring positioning concave table is formed on the end cover around the shaft hole of the end cover, the ratchet wheel ring is fixed on the inner periphery of the ratchet wheel ring positioning concave table, a pawl positioning sleeve which is sleeved on the supporting shaft and stretches into the ratchet wheel ring positioning concave table is formed at one end of the tower foundation, which faces the end cover, and a pawl is fixed on the pawl positioning sleeve and can be separated relative to the ratchet wheel ring in the axial direction.

The fixing mode of the ratchet ring in the ratchet ring positioning concave table can be various, for example, the ratchet ring can be embedded and fixed with the inner periphery of the ratchet ring positioning concave table through a key groove structure in an interference manner, and the ratchet ring can also be fixed to the bottom of the ratchet ring positioning concave table by means of screws. For optimization design, we further take the following two preferred fixing modes:

the ratchet wheel ring positioning concave table is characterized in that the inner periphery of the ratchet wheel ring positioning concave table is provided with an internal thread, the internal thread is matched with an external thread arranged on the outer periphery of the ratchet wheel ring to fix the ratchet wheel ring, the fixing mode can ensure the positioning stability of the ratchet wheel ring, and the ratchet wheel ring can be removed without tools.

Or in another fixing mode of the ratchet wheel ring, we also comprise a ratchet wheel ring positioning flange plate fixed outside the end cover through screws, the center of the ratchet wheel ring positioning flange plate is provided with an annular flanging extending into the ratchet wheel ring positioning concave table, the inner periphery of the annular flanging is fixedly provided with the ratchet wheel ring, the fixing mode can also provide good positioning stability for the ratchet wheel ring, and meanwhile, the ratchet wheel ring is convenient to detach along with the ratchet wheel ring positioning flange plate.

Further, the tower foundation comprises a tower foundation body and a tower foundation bearing fixed on the inner side of the tower foundation body, the tower foundation body is assembled on the supporting shaft through the tower foundation bearing, the end cover bearing and the tower foundation bearing are arranged side by side along the axial direction of the supporting shaft, and the pawl positioning sleeve is formed on one end, opposite to the end cover bearing, of the tower foundation body.

Furthermore, two tower base bearings are fixed at the inner side of the tower base body, namely a first tower base bearing and a second tower base bearing, wherein the first tower base bearing is positioned between the end cover bearing and the second tower base bearing along the axial direction of the supporting shaft, the ratchet wheel pawl type one-way clutch is positioned between the end cover bearing and the first tower base bearing, the first tower base bearing is propped against the end cover bearing through a locking sleeve sleeved on the supporting shaft, and a locking nut is propped against the second tower base bearing.

Still further, in the utility model, a waterproof gasket is clamped between the inner periphery of the tower base body and the outer periphery of the locking nut, and the waterproof gasket is positioned at the outer side of the second tower base bearing and props against the second tower base bearing.

Furthermore, in the utility model, a waterproof oil seal is clamped between the peripheries of Zhou Yuda bases in the opening part of the ratchet ring positioning concave table. The waterproof oil seal is arranged as the ratchet ring and the pawl which are matched with each other in the inner cavity of the ratchet ring positioning concave table play a good waterproof and dustproof role.

The utility model has the advantages that:

1) The easily-detachable connecting structure of the hub motor and the tower foundation is quite convenient for disassembling the tower foundation, and the tower foundation can be disassembled only by unscrewing the locking nut at one end of the tower foundation to ensure that the pawl arranged at the other end of the tower foundation is axially separated from the ratchet wheel ring on the end cover, so that the operation is quite convenient, great convenience is provided for maintaining and replacing the tower foundation, and the maintenance and replacement efficiency of the tower foundation is greatly improved.

2) According to the easy-disassembly type connection structure of the hub motor and the tower foundation, when the tower foundation is disassembled, the ratchet wheel and pawl type one-way clutch is not required to be integrally disassembled, and the ratchet wheel ring is not fixed by utilizing the flange plate at the inner side of the end cover of the hub motor, so that compared with the prior art, the disassembly of the tower foundation is implemented without opening the end cover of the hub motor, the disassembly process of the tower foundation is simplified, pollution to internal movement components caused by opening the end cover of the hub motor is avoided, interference to the hub motor in the disassembly of the tower foundation is reduced to the greatest extent, and the use safety of the hub motor is ensured.

3) In the easy-disassembly connecting structure of the hub motor and the tower foundation, the ratchet ring and the pawl of the ratchet pawl type one-way clutch are matched in the ratchet ring positioning concave table arranged outside the end cover of the hub motor, the axial limitation of a tower foundation bearing is completely avoided, and the pawl can be easily and axially separated along with the tower foundation relative to the ratchet ring, so that the independent cleaning of the pawl is facilitated, the cleaning frequency of the pawl is increased, and the working reliability of the ratchet pawl type one-way clutch is improved.

4) According to the easy-disassembly connecting structure of the hub motor and the tower foundation, when the tower foundation is disassembled, the ratchet ring can be left in the ratchet ring positioning concave table outside the hub motor end cover, and the ratchet ring can be easily disassembled from the ratchet positioning concave table for maintenance and replacement, so that convenience is provided for overall maintenance of the ratchet pawl type one-way clutch. And the ratchet ring is replaced without being replaced together with the end cover of the hub motor, so that the manufacturing and using cost of the hub motor can be saved.

5) In the easy-to-detach connection structure of the hub motor and the tower foundation, the hub motor and the tower foundation bear loads through the end cover bearing and the tower foundation bearing respectively instead of the shared bearing, so that the support stability of the hub motor and the tower foundation structure is good. And because the load of the end cover bearing is reduced, the diameter of the end cover bearing can be reduced, and the end cover bearing and the tower base bearing are arranged side by side along the axial direction of the supporting shaft, so that the optimization of the radial size of the whole hub motor is facilitated, and the production cost is saved.

Drawings

The utility model is further described below with reference to the accompanying drawings and examples:

FIG. 1 is a cross-sectional view of the structure of the present utility model;

fig. 2 is an enlarged view of a in fig. 1.

Wherein: 1. a support shaft; 2. a hub motor; 3. a tower foundation; 301. a tower base body; 302. a tower base bearing; 302a, a first tower-based bearing; 302b, a second tower-based bearing; 4. an end cap; 401. a shaft hole; 402. ratchet ring positioning concave table; 5. a lock nut; 6. an end cap bearing; 7. a ratchet ring; 8. a pawl; 9. pawl positioning sleeve; 10. waterproof oil seal; 11. a waterproof gasket; 12. a locking sleeve; 13. and (3) a flywheel.

Detailed Description

Examples: the following describes a specific embodiment of the easy-to-detach connection structure of the hub motor and the tower foundation according to the present utility model with reference to fig. 1 and 2 as follows:

the easy-to-detach connection structure of the hub motor and the tower footing is the same as the known technology, and comprises a hub motor 2 and a tower footing 3 which are assembled on a supporting shaft 1, wherein the tower footing 3 is positioned at the outer side of a detachable end cover 4 of the hub motor 2 and is axially locked by a locking nut 5 which is arranged on the supporting shaft 1 and is positioned at one end of the tower footing 3, which is opposite to the end cover 4, and the periphery of the tower footing 3 is used for installing a flywheel 13; the end cap 4 is fitted to the support shaft 1 through an end cap bearing 6 fixed in its shaft hole 401, and the tower foundation 3 is connected to the end cap 4 through a ratchet-pawl type one-way clutch composed of a ratchet ring 7 and pawls 8 fitted with ratchet grooves on the inner periphery of the ratchet ring 7.

The core design of the easy-to-detach connecting structure is that a ratchet ring positioning concave table 402 positioned outside the end cover bearing 6 is formed on the end cover 4 around a shaft hole 401 of the end cover, the ratchet ring 7 is fixed on the inner periphery of the ratchet ring positioning concave table 402, a pawl positioning sleeve 9 which is sleeved on the supporting shaft 1 and stretches into the ratchet ring positioning concave table 402 is formed on one end of the tower base 3 facing the end cover 4, and a pawl 8 is fixed on the pawl positioning sleeve 9 and can be axially detached relative to the ratchet ring 7.

Referring specifically to fig. 1 and 2, the inner periphery of the ratchet ring positioning recess 402 in this embodiment is provided with an internal thread, which cooperates with an external thread provided on the outer periphery of the ratchet ring 7 to fix the ratchet ring 7.

The tower foundation 3 is the same as the conventional technology, and is provided with a tower base body 301 and two tower foundation bearings 302 fixed on the inner side of the tower base body 301, wherein the tower base body 301 is assembled on the supporting shaft 1 through the two tower foundation bearings 302, and the periphery of the tower base body 301 is used for installing the flywheel 13; the end cover bearing 6 and the two tower base bearings 302 are arranged side by side along the axial direction of the support shaft 1, and the pawl positioning sleeve 9 is formed on the end of the tower base 301 opposite to the end cover bearing 6.

As shown in fig. 1, the two tower base bearings 302 are a first tower base bearing 302a and a second tower base bearing 302b, wherein the first tower base bearing 302a is located between the end cover bearing 6 and the second tower base bearing 302b along the axial direction of the support shaft 1, the ratchet-pawl type one-way clutch is located between the end cover bearing 6 and the first tower base bearing 302a, the first tower base bearing 302a abuts against the end cover bearing 6 through a locking sleeve 12 sleeved on the support shaft 1, and the locking nut 5 abuts against the second tower base bearing 302 b.

And still as shown in fig. 1, a waterproof gasket 11 for preventing sewage and dust from entering the tower foundation 3 is clamped between the inner periphery of the tower foundation body 301 and the outer periphery of the locking nut 5, and the waterproof gasket 11 is positioned outside the second tower foundation bearing 302b and abuts against the second tower foundation bearing 302 b. Meanwhile, a waterproof oil seal 10 is clamped between the peripheries of the Zhou Yuda base 3 (namely the tower base body 301) in the opening part of the ratchet ring positioning concave table 402. The waterproof oil seal 10 is arranged in the inner cavity of the ratchet ring positioning concave table 402, and the ratchet ring 7 and the pawl 8 which are matched with each other play a good waterproof and dustproof role.

The easy-to-detach type connecting structure of the hub motor and the tower footing is quite convenient for disassembling the tower footing 3, and the tower footing 3 can be disassembled only by unscrewing the locking nut 5 at one end of the tower footing 3, so that the pawl 8 arranged at the other end of the tower footing 3 is axially separated from the ratchet ring 7 on the end cover 4, the operation is quite convenient, great convenience is provided for maintaining and replacing the tower footing 3, and the maintenance and replacement efficiency of the tower footing 3 is greatly improved.

And when dismantling tower base 3, need not to link and take ratchet pawl formula one-way clutch whole and pull down in the lump, its ratchet ring 7 is also not fixed with the ring flange of the inboard end cover 4 of in-wheel motor 2, consequently compare prior art, need not to open the end cover 4 of in-wheel motor 2 and implement the dismantlement of tower base 3, not only simplified tower base 3 and dismantled the process, avoid causing the pollution to inside core components and parts because of opening the end cover 4 of in-wheel motor 2 moreover, the interference to in-wheel motor 2 in the dismantlement of the maximized reduction tower base 3 has guaranteed the safety in utilization of in-wheel motor 2.

Meanwhile, in the easy-to-detach connection structure of the hub motor and the tower foundation, the ratchet ring 7 and the pawl 8 of the ratchet pawl type one-way clutch are matched in the ratchet ring positioning concave table 402 arranged outside the end cover 4 of the hub motor 2, the axial limitation of the tower foundation bearing 302 is completely avoided, and the pawl 8 can be easily and axially detached along with the tower foundation 3 relative to the ratchet ring 7, so that the independent cleaning of the pawl 8 is facilitated, the cleaning frequency of the pawl 8 is increased, and the working reliability of the ratchet pawl type one-way clutch is improved.

In this embodiment, when the tower foundation 3 is detached, the ratchet ring 7 can be left in the ratchet ring positioning concave table 402 outside the end cover 4 of the hub motor 2, and of course, the ratchet ring can be easily detached from the ratchet ring positioning concave table 402 for maintenance and replacement, thereby providing convenience for overall maintenance of the ratchet-pawl type one-way clutch. And the ratchet ring 402 does not need to be replaced together with the end cover 4 of the hub motor 2, so that the manufacturing and using cost of the hub motor 2 can be saved.

Finally, in the detachable connection structure of the hub motor and the tower foundation, the hub motor 2 and the tower foundation 3 do not bear the load through the shared bearing, but bear the load through the end cover bearing 6 and the tower foundation bearing 302 respectively, so that the support stability of the two structures of the hub motor 2 and the tower foundation 3 is better. And because the load of the end cover bearing 6 is reduced, the diameter of the end cover bearing 6 can be reduced, and the end cover bearing 6 and the tower base bearing 302 are arranged side by side along the axial direction of the support shaft 1, so that the optimization of the radial dimension of the whole hub motor 2 is facilitated, and the production cost is saved.

The above embodiments are merely for illustrating the technical concept and features of the present utility model, and are not intended to limit the scope of the present utility model to those skilled in the art to understand the present utility model and implement the same. All modifications made according to the spirit of the main technical proposal of the utility model should be covered in the protection scope of the utility model.

Claims

1. The utility model provides a wheel hub motor and easy-to-detach connection structure of tower base, includes wheel hub motor (2) and tower base (3) of assembly on back shaft (1), and tower base (3) are located the detachable end cover (4) outside of wheel hub motor (2) to by locating on back shaft (1) and be located lock nut (5) axial locking of tower base (3) one end that is away from end cover (4); the end cover (4) is assembled on the support shaft (1) through an end cover bearing (6) fixed in a shaft hole (401) of the end cover, and the tower foundation (3) is connected with the end cover (4) through a ratchet-pawl type one-way clutch, wherein the ratchet-pawl type one-way clutch comprises a ratchet ring (7) and pawls (8) matched with the ratchet ring; the ratchet wheel positioning concave table (402) is formed on the end cover (4) around the shaft hole (401) of the end cover, the ratchet wheel ring (7) is fixed on the inner periphery of the ratchet wheel positioning concave table (402), a pawl positioning sleeve (9) which is sleeved on the support shaft (1) and stretches into the ratchet wheel positioning concave table (402) is formed at one end of the tower foundation (3) facing the end cover (4), and a pawl (8) is fixed on the pawl positioning sleeve (9) and can be axially separated relative to the ratchet wheel ring (7).

2. The detachable connection structure of the hub motor and the tower foundation according to claim 1, wherein the ratchet ring positioning concave table (402) is provided with an internal thread on the inner periphery thereof, and the internal thread is matched with an external thread arranged on the outer periphery of the ratchet ring (7) to fix the ratchet ring (7).

3. The detachable connection structure of the hub motor and the tower footing according to claim 1, further comprising a ratchet ring positioning flange fixed outside the end cover (4) by screws, wherein the center of the ratchet ring positioning flange is provided with an annular flanging extending into the ratchet ring positioning concave table (402), and the inner periphery of the annular flanging is fixed with the ratchet ring (7).

4. The detachable connection structure of the hub motor and the tower foundation according to claim 1, wherein the outer periphery of the ratchet wheel ring (7) and the inner periphery of the ratchet wheel ring positioning concave table (402) are embedded and fixed through a key groove structure in an interference manner, or the ratchet wheel ring (7) is fixed to the bottom of the ratchet wheel ring positioning concave table (402) through screws.

5. The detachable connection structure of the hub motor and the tower foundation according to claim 1, wherein the tower foundation (3) comprises a tower foundation body (301) and a tower foundation bearing (302) fixed on the inner side of the tower foundation body (301), the tower foundation body (301) is assembled on the support shaft (1) through the tower foundation bearing (302), the end cover bearing (6) and the tower foundation bearing (302) are arranged side by side along the axial direction of the support shaft (1), and the pawl positioning sleeve (9) is formed on one end, opposite to the end cover bearing (6), of the tower foundation body (301).

6. The detachable connection structure of a hub motor and a tower foundation according to claim 5, wherein two tower foundation bearings (302) are fixed on the inner side of the tower foundation body (301), namely a first tower foundation bearing (302 a) and a second tower foundation bearing (302 b), the first tower foundation bearing (302 a) is located between an end cover bearing (6) and the second tower foundation bearing (302 b) along the axial direction of the supporting shaft (1), the ratchet pawl type one-way clutch is located between the end cover bearing (6) and the first tower foundation bearing (302 a), the first tower foundation bearing (302 a) is propped against the end cover bearing (6) through a locking sleeve (12) sleeved on the supporting shaft (1), and a locking nut (5) is propped against the second tower foundation bearing (302 b).

7. The detachable connection structure of the hub motor and the tower footing according to claim 1, 5 or 6, wherein a waterproof oil seal (10) is clamped between the peripheries of the Zhou Yuda foundation (3) in the mouth of the ratchet ring positioning concave table (402).

8. The detachable connection structure of the hub motor and the tower foundation according to claim 6, wherein a waterproof gasket (11) is clamped between the inner periphery of the tower foundation body (301) and the outer periphery of the locking nut (5), and the waterproof gasket (11) is located outside the second tower foundation bearing (302 b) and abuts against the second tower foundation bearing (302 b).