Hub motor with motor lead protection structure

Abstract

The utility model relates to a wheel hub motor with a motor lead wire protection structure, which comprises a motor shaft assembly, a stator and a wheel hub assembly which are coaxially arranged, two sides of the stator are respectively connected with a side cover and a hub cover, the motor shaft assembly comprises a motor shaft and a protection wire plug, the motor shaft is provided with a lead wire hole, and the protection wire plug is arranged in the lead wire hole. The protection wire plug is provided with a wire plug body of a hollow tubular structure, one end of the wire plug body extends in the direction away from the wire plug body in the axial direction to form a motor shaft connecting part, a groove is formed in the other end of the wire plug body, and the groove extends in the direction away from the wire plug body to form a lead protection part. The lead wire protection part is of a semi-closed structure, the edge of the lead wire protection part extends outwards to form an edge reinforcing part, the protection wire plug is arranged in an outlet, located at the shaft end of the motor shaft, of the lead wire hole through the motor shaft connecting part, and the hub motor with the motor lead wire protection structure is low in failure rate, long in service life, safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of hub motor technology, and in particular to a hub motor with a motor lead wire protection structure. Background Technology

[0002] A hub motor is a wheel-side transmission mechanism that integrates the power system, transmission system, and braking system, and is mainly used in the wheel structure of various vehicles. According to market statistics on motor failures, lead wire problems account for a high proportion of hub motor failures. The main location of lead wire damage is the part protruding from the shaft end hole. The root cause is that the structure and shape of the shaft's wire-passing hole limit the effective removal of sharp edges and corners. After prolonged operation, the motor lead wire insulation constantly contacts and rubs against the shaft end, inevitably causing scratches or even punctures. Damaged lead wire insulation reduces the motor's waterproof rating, allowing water to flow into the motor through the damaged insulation and become trapped, leading to internal rusting, jamming, and short circuits, causing motor failure. In some cases, the sharp corners of the shaft end can even pierce the PVC and Teflon insulation, exposing one or more strands of copper wire, causing short circuits between wires or between the wire and the vehicle, resulting in motor failure.

[0003] In the existing technology, there are no good protective measures at the lead wire outlet of the hub motor shaft end to protect the lead wire from damage. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a hub motor with a low failure rate, long service life, and high safety and reliability, featuring a motor lead wire protection structure.

[0005] This utility model is achieved through the following technical solution: a hub motor with a motor lead wire protection structure, including a motor shaft assembly, a stator, and a hub assembly arranged coaxially, with a side cover and a hub cover respectively connected to both sides of the stator, and the hub assembly sleeved on the outside of the stator and having a magnet inside the hub assembly.

[0006] The motor shaft assembly includes a motor shaft and a protective wire plug. The motor shaft has a lead wire hole for arranging the lead wires. The lead wire hole extends from the inside of the stator to the end of the motor shaft. To better protect the lead wires and prevent them from being scratched or punctured at the lead wire outlet of the motor shaft, the protective wire plug has a hollow tubular wire plug body. One end of the wire plug body extends axially away from the wire plug body to a motor shaft connecting portion. The motor shaft connecting portion has a taper that tapers inward in the direction of its axis. The other end of the wire plug body has a bevel. The bevel extends away from the wire plug body to a lead wire protection portion. The lead wire protection portion has a semi-closed structure. The inner surface of the lead wire protection portion transitions to the inner surface of the wire plug body through an arc. The axis of the lead wire protection portion forms an obtuse angle with the axis of the wire plug body. The edge of the lead wire protection portion extends outward to have an edge reinforcement portion. The protective wire plug is disposed within the outlet of the lead wire hole located at the end of the motor shaft through the motor shaft connecting portion.

[0007] To improve reliability and ease of production, the main body of the wire plug, the motor shaft connection, and the lead wire protection are integrally formed.

[0008] Preferably, the axis of the lead wire protection part is at 100° to the axis of the wire plug body.

[0009] Preferably, the protective plug is made of nylon, but other materials can also be used depending on the actual situation.

[0010] The beneficial effects of this utility model are as follows: This hub motor with a motor lead wire protection structure protects the motor shaft lead wires by installing a protective plug at the lead wire outlet at the motor shaft end, greatly reducing the lead wire failure rate and thus improving the reliability and service life of the hub motor; by optimizing the structure of the protective plug, the friction between the lead wire and the lead wire hole at the motor shaft end is minimized while improving the ease of installation of the protective plug; in addition, this hub motor with a motor lead wire protection structure is compact and highly reliable. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the hub motor with motor lead wire protection structure according to the present invention.

[0012] Figure 2 This is a cross-sectional view of the hub motor with a motor lead wire protection structure according to the present invention.

[0013] Figure 3-4 This is a schematic diagram of the protective wire plug for a hub motor with a motor lead protection structure according to the present invention.

[0014] In the diagram: 1. Motor shaft assembly; 11. Motor shaft; 111. Lead wire hole; 12. Protective wire plug; 121. Wire plug body; 122. Motor shaft connection part; 123. Bevel; 124. Lead wire protection part; 1241. Edge reinforcement part; 2. Stator; 3. Hub assembly; 4. Side cover; 5. Hub cover; 6. Magnet; 9. Lead wire. Detailed Implementation

[0015] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0016] like Figure 1-2 The hub motor shown includes a motor lead wire protection structure, comprising a motor shaft assembly 1, a stator 2, and a hub assembly 3 arranged coaxially. Side covers 4 and hub covers 5 are respectively connected to both sides of the stator 2. The hub assembly 3 is sleeved on the stator 2 and has a magnet 6 inside.

[0017] The motor shaft assembly 1 includes a motor shaft 11 and a nylon protective wire plug 12. The motor shaft 11 has a lead wire hole 111, which extends from inside the stator 2 to the end of the motor shaft 11. Figure 3-4 As shown, the protective plug 12 has a hollow tubular plug body 121. One end of the plug body 121 extends axially away from the plug body 121 to form a motor shaft connection portion 122. The motor shaft connection portion 122 has a taper that tapers inward toward its axis. The other end of the plug body 121 has a bevel 123. The bevel 123 extends away from the plug body 121 to form a lead wire protection portion 124. The lead wire protection portion 124 is a semi-closed structure. The inner surface of the lead wire protection portion 124 transitions to the inner surface of the plug body 121 through an arc. The angle α between the axis of the lead wire protection portion 124 and the axis of the plug body 121 is 100°. The edge of the lead wire protection portion 124 extends outward to form an edge reinforcement portion 1241. The protective plug 12 is disposed in the outlet of the lead wire hole 111 located at the end of the motor shaft 11 through the motor shaft connection portion 122.

[0018] The lead wire 9 inside the hub motor with the motor lead wire protection structure is led out from inside the stator 2, set in the lead wire hole 111, and extends out from the protective wire plug 12 set at the end of the motor shaft 11 to connect the required electronic components or circuits. During the use of the hub motor, the protective wire plug 12 can effectively prevent the lead wire 9 from directly contacting and rubbing against the lead wire outlet 111, thus preventing damage. The protective wire plug 12 effectively protects the lead wire 9 and ensures the stable operation of the hub motor.

[0019] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] Furthermore, in the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "set up," "equipped with," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A wheel hub motor with motor lead protection structure, comprising a motor shaft assembly, a stator and a wheel hub assembly arranged coaxially, the stator is connected with a side cover and a hub cover respectively on both sides, the wheel hub assembly is sleeved outside the stator, and a magnetic steel is arranged in the wheel hub assembly, characterized in that: The motor shaft assembly comprises a motor shaft and a protective wire plug, the motor shaft is provided with a lead hole extending from the inside of a stator to the shaft end of the motor shaft, the protective wire plug has a hollow tubular wire plug body, one end of the wire plug body extends axially away from the wire plug body to form a motor shaft connecting portion, the motor shaft connecting portion has a taper inwardly to the axis thereof, the other end of the wire plug body is provided with a bevel, the bevel extends away from the wire plug body to form a lead protection portion, the lead protection portion is a semi-closed structure, the inner surface of the lead protection portion and the inner surface of the wire plug body are connected through a circular arc, the axis of the lead protection portion and the axis of the wire plug body form an obtuse angle, the edge of the lead protection portion extends outwardly to form an edge reinforcing portion, and the protective wire plug is arranged in the outlet of the lead hole at the shaft end of the motor shaft through the motor shaft connecting portion.

2. The in-wheel motor having a motor lead wire protection structure according to claim 1, characterized by: The axis of the lead protection portion and the axis of the wire plug body form an angle of 100°.

3. The in-wheel motor having a motor lead wire protection structure according to claim 1, characterized by: The material of the protective wire plug is nylon.

4. The in-wheel motor having a motor lead wire protection structure according to claim 1, characterized by: The wire plug body, the motor shaft connecting portion and the lead protection portion are integrally formed.

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