Shaft end protective sleeve and hub motor

Abstract

The end portion, provided with a power line, of a wheel shaft of the hub motor is sleeved with the shaft end protective sleeve provided with a U-shaped notch, the end portion of the other end of the wheel shaft is sleeved with the shaft end protective sleeve without a U-shaped notch, and the end portion of the wheel shaft is provided with a radial through hole. The axle end protection sleeve has the advantages that the axle end protection sleeves are arranged at the two ends of the axle in a sleeving mode, threads at the ends of the axle can be effectively protected, the connection firmness of the axle end protection sleeves and the axle is enhanced through the sunk screws installed in a hidden mode, the axle end protection sleeves are not prone to falling off, and the axle end protection sleeves are not prone to falling off. The possibility that the shaft end protective sleeve falls off during shaking in the riding process of the electric bicycle is reduced, and the disassembly of the axle is not excessively hindered.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hub motors, in particular to a shaft end protection sleeve and a wheel hub motor equipped with the shaft end protection sleeve. Background Art

[0002] The hub motor of an electric bicycle needs to face different climate environments. If the end of the hub motor axle is exposed to a humid environment for a long time, it is easy to rust, resulting in damage to the threads on it, which is not conducive to the disassembly and assembly of the hub motor. Therefore, relevant personnel put a protective cover on the end of the axle for protection. However, the protective cover is usually made of cheap lightweight materials different from the axle. Under different telescopic ratios, the ordinary sleeve relationship is difficult to ensure that the protective cover will not fall off during the shaking of the electric bicycle during riding, which needs to be improved. Utility Model Content

[0003] A technical problem to be solved by the present application is to overcome the defects of the above related technologies and provide a shaft end protective sleeve that can be firmly connected to the wheel axle of the hub motor.

[0004] The technical solution adopted by the shaft end protection sleeve to solve the technical problem is: a shaft end protection sleeve, including a sleeve body, an axial blind hole is provided at the inner end of the sleeve body, a head hole and a tail hole are provided on both side walls of the blind hole, the axis of the head hole coincides with the axis of the tail hole, and the tail hole is a threaded hole.

[0005] Compared with the related technology, the shaft end protection sleeve of the present application has the following advantages: coaxial head holes and threaded holes are provided on both sides of the blind hole of the sleeve body, and the connection firmness between the shaft end protection sleeve and the hub motor axle can be improved by screwing screws, reducing the possibility of the shaft end protection sleeve falling off due to the shaking during the riding of the electric bicycle, and does not hinder the removability of the shaft end protection sleeve.

[0006] As an improvement, the head hole is a countersunk hole, and a countersunk screw can be used for fixing, and the countersunk screw is immersed in the shaft end protective sleeve to reduce the corrosion damage of the countersunk screw.

[0007] Preferably, the blind hole is a waist-shaped hole, and the countersunk hole and the threaded hole are respectively arranged on the flat walls on both sides of the waist-shaped hole. The countersunk hole can be designed to be deeper, and the threaded hole can be designed to be longer, so as to improve the connection stability of the countersunk screw.

[0008] Preferably, the upper part of the inner end of the sleeve is provided with a U-shaped notch for arranging the power cord, which is used to be assembled on the shaft end provided with the power cord to form a certain support for the spring protective sleeve outside the power cord.

[0009] Another technical problem to be solved by the present application is to overcome the defects of the above-mentioned related technologies and provide a hub motor with a shaft end protective sleeve firmly connected and the thread at the end of the wheel axle being able to obtain long-term protection.

[0010] The technical solution adopted by the hub motor to solve the technical problem is: a hub motor, whose wheel axle is provided with an end sleeve of the power cord provided with the above-mentioned shaft end protection sleeve provided with a U-shaped notch, and the other end sleeve of the wheel axle is provided with the above-mentioned other shaft end protection sleeve, the end of the wheel axle is provided with a radial through hole, the screw of the countersunk screw passes through the countersunk hole and the radial through hole and is screwed in the threaded hole.

[0011] Compared with the related art, the hub motor of the present application has the following advantages: shaft end protection sleeves are provided at both ends of the wheel axle to protect the threads at the ends of the wheel axle, and the connection between the shaft end protection sleeve and the wheel axle is strengthened by concealed countersunk screws without causing too much obstruction to the detachability of the wheel axle.

[0012] Preferably, the cross-section of the end of the wheel axle is waist-shaped, and the planes on both sides of the end of the wheel axle fit with the flat walls on both sides of the waist-shaped hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of a shaft end protective sleeve (non-power line end) of the present application.

[0014] Figure 2 It is a three-dimensional schematic diagram of another shaft end protective sleeve (power line end) of the present application.

[0015] Figure 3 It is a three-dimensional schematic diagram of the hub motor of the present application.

[0016] Description of reference numerals:

[0017] 1. Axle, 2. Power cord, 3. Spring protection cover, 4. Shaft end protection cover, 4.1. Countersunk hole, 4.2. Threaded hole, 4.3. U-shaped notch, 5. Countersunk screw. DETAILED DESCRIPTION

[0018] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0019] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] In this embodiment, a shaft end protection sleeve 4 is sleeved on the end of the wheel shaft 1 where the wheel hub motor is not provided with a power line. Figure 1 As shown, it includes a sleeve body, an axial blind hole is provided at the inner end of the sleeve body, the head hole provided on the side wall of the blind hole is a countersunk hole 4.1 with the head outside, and the tail hole provided on the other side wall of the blind hole is a threaded hole 4.2, and the axis of the threaded hole 4.2 coincides with the axis of the countersunk hole 4.1 and the same horizontal radial line of the sleeve body.

[0021] Another shaft end protection sleeve 4 of this embodiment is sleeved on the end of the wheel shaft 1 where the power line of the wheel hub motor is arranged. Figure 2 As shown, it is roughly the same as the above-mentioned shaft end protection sleeve 4, except that the sleeve body is relatively extended, and a U-shaped notch 4.3 for the power cord 2 to be discharged is provided at the upper inner end of the sleeve body, and the U-shaped notch 4.3 can form a certain support for the spring protection sleeve 3 protecting the power cord 2.

[0022] In the above two shaft end protection sleeves 4, the blind holes are waist-shaped holes, and the countersunk holes 4.1 and threaded holes 4.2 are respectively arranged on the flat walls on both sides of the waist-shaped holes. Therefore, the outer diameter of the countersunk holes 4.1 can be designed to be slightly larger, and the length of the threaded holes 4.2 will be increased, and the screw connection with the countersunk screws 5 will be more secure.

[0023] A hub motor of the preferred embodiment is as follows Figure 3 As shown, the wheel axle 11 is provided with a sleeve on the end of the power cord 2. Figure 2 The shaft end protection sleeve 4 shown in the figure, the other end of the wheel shaft 1 is provided with Figure 1 The shaft end protection sleeve 4 shown in the figure, the end of the wheel shaft 1 is provided with a radial through hole (not shown in the figure), the screw of the countersunk screw 5 passes through the countersunk hole 4.1 and the radial through hole and is screwed into the threaded hole 4.2, which can greatly reduce the possibility of the countersunk screw 5 being exposed to rain water and is relatively not easy to be corroded and damaged.

[0024] Preferably, the cross-section of the end of the axle 1 is waist-shaped, and the planes on both sides of the end of the axle 1 fit with the flat walls on both sides of the waist-shaped hole.

Claims

1. A shaft end protective sleeve, comprising a sleeve body, wherein the inner end of the sleeve body is provided with an axial blind hole, characterized in that: A head hole and a tail hole are arranged on both side walls of the blind hole, the axis of the head hole coincides with the axis of the tail hole, and the tail hole is a threaded hole.

2. The shaft end protective sleeve according to claim 1, characterized in that: The head hole is a countersunk hole.

3. The shaft end protection sleeve according to claim 2, characterized in that: The blind hole is a waist-shaped hole, and the countersunk hole and the threaded hole are respectively arranged on the flat walls on both sides of the waist-shaped hole.

4. The shaft end protective sleeve according to any one of claims 1 to 3, characterized in that: The upper portion of the inner end of the sleeve is provided with a U-shaped notch for arranging the power line.

5. A hub motor, characterized in that: The wheel axle is provided with an end sleeve of the power cord and an end sleeve of the shaft end protection sleeve as claimed in claim 4, and the other end sleeve of the wheel axle is provided with an end sleeve of the shaft end protection sleeve as claimed in claim 2. The end of the wheel axle is provided with a radial through hole, and the screw of the countersunk screw passes through the countersunk hole and the radial through hole and is screwed into the threaded hole.

6. The wheel hub motor according to claim 5, characterized in that: The cross section of the end of the wheel shaft is waist-shaped, and the planes on both sides of the end of the wheel shaft are in contact with the flat walls on both sides of the waist-shaped hole.

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