Rotating shaft structure of motor for coaxial bridge

Abstract

The utility model discloses a rotating shaft structure of a motor for a coaxial axle, belongs to the related technical field of motors, and aims to solve the problem that in the prior art, in the long-term operation process, due to factors such as rotating motion of a rotating shaft and vibration of a vehicle, a sealing device may be abraded, aged or deformed, so that the sealing performance is reduced and even fails. The utility model relates to a motor for a coaxial bridge, which solves the problems that a motor winding and a bearing are polluted and the insulating property and the heat dissipation effect of the motor are influenced once sealing fails and external impurities enter the motor, and further the service life of the motor is shortened, and comprises a rotating shaft, a plurality of groups of ring bodies are connected at the rotating shaft, and two groups of ring bodies are arranged at the rotating shaft close to a cover in the motor for the coaxial bridge. The ring body is wrapped by the first sleeve body and the second sleeve body and arranged in the arc-shaped grooves of the two sleeve bodies. Therefore, a multi-protection sealing defensive line is formed between the rotating shaft and the machine cover. And the structure is cooperated with the original sealing structure of the motor, so that the sealing performance is greatly enhanced, and the stable work of the motor is powerfully ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor related technical field, more specifically, it is especially related to a coaxial bridge motor's rotating shaft structure. BACKGROUND

[0002] The rotating shaft structure of the coaxial bridge motor is the core component of the motor operation. It is generally made of high-quality alloy steel, has high strength and hardness, and can withstand large torque and impact force. The surface of the rotating shaft is precisely machined and has high smoothness to reduce friction and wear. Its two ends are equipped with high-precision bearings to ensure the stability and precision of the rotating shaft during high-speed rotation, effectively reducing vibration and noise. The rotating shaft is designed with keyways and mounting holes to facilitate the installation of the motor rotor and the connection of external transmission components, thereby achieving efficient power transmission of the motor and ensuring the reliable operation of the coaxial bridge motor.

[0003] Although the rotating shaft of the coaxial bridge motor can transmit power, in order to prevent dust, moisture and oil stains from entering the motor, a sealing device is usually provided between the rotating shaft and the motor housing. However, during long-term operation, due to the rotating motion of the rotating shaft and vehicle vibration, the sealing device may wear, age or deform, resulting in a decrease in sealing performance or even failure. Once the seal fails, foreign matter enters the motor, which can contaminate the motor winding and bearing, affecting the insulation performance and heat dissipation effect of the motor, thereby shortening the service life of the motor. UTILITY MODEL CONTENTS

[0004] In view of the shortcomings of the prior art, the utility model provides a rotating shaft structure of a coaxial bridge motor to solve the technical problem that in the prior art, during long-term operation, due to the rotating motion of the rotating shaft and vehicle vibration, the sealing device may wear, age or deform, resulting in a decrease in sealing performance or even failure. Once the seal fails, foreign matter enters the motor, which can contaminate the motor winding and bearing, affecting the insulation performance and heat dissipation effect of the motor, thereby shortening the service life of the motor.

[0005] To achieve the above purpose, the utility model realizes the following technical scheme: a rotating shaft structure of a coaxial bridge motor, comprising a rotating shaft, a plurality of ring bodies are connected to the rotating shaft, a first sleeve and a second sleeve are provided at the plurality of ring bodies, the first sleeve and the second sleeve are mutually adhered, a plurality of arc-shaped grooves are formed in the first sleeve and the second sleeve, and the plurality of arc-shaped grooves are arranged in pairs to form a ring shape, and the plurality of ring bodies are respectively placed in the corresponding arc-shaped grooves.

[0006] As a preferred technical scheme of the utility model, a plurality of cooling fins are connected to the rotating shaft.

[0007] As the preferred technical scheme of the utility model, the first sleeve body is provided with a first hole body at one end and the other end, the second sleeve body is provided with a second hole body at one end and the other end, a plurality of bolts are threadedly connected at the second hole bodies, and the plurality of bolts are threadedly connected with the corresponding first hole bodies.

[0008] As the preferred technical scheme of the utility model, the shaft is provided with a key groove at one end.

[0009] As the preferred technical scheme of the utility model, a plurality of groups of the radiating fins are arranged in an annular array on the shaft.

[0010] As the preferred technical scheme of the utility model, a plurality of groups of the radiating fins are arranged in an annular array on the shaft.

[0011] The utility model provides a kind of shaft structure of motor for coaxial bridge, with following beneficial effects:

[0012] The utility model is cooperated between shaft, ring body, first sleeve body, second sleeve body and arc-shaped groove, two groups of ring bodies are installed in the close place of shaft and motor cover for coaxial bridge, and ring body is wrapped by first sleeve body and second sleeve body, and ring body is placed in the arc-shaped groove of first sleeve body and second sleeve body, so that a multiple protective sealed defense line is built between shaft and motor cover, so that external dust particles are difficult to find the access to motor interior.I even if a small amount of dust contacts the sealing structure, it will be blocked outside the labyrinth gap formed by ring body and sleeve body, cannot cross layer barrier and reach motor winding and bearing part, and cooperate with the original sealing structure of motor cover and shaft, can enhance sealing property, guarantee the working stability of motor.

[0013] 2, by the cooperation between shaft and radiating fin, utilize the plurality of radiating fins in annular array exposed place of shaft, and the plurality of radiating fins are placed in radial pattern with shaft as center, so that heat can be evenly diffused to all directions along radiating fin, avoid heat concentration in local area, optimize the heat dissipation path, help to maintain motor temperature balance, reduce thermal stress caused by temperature difference, improve the reliability and stability of motor. ACCURACY OF DRAWINGS

[0014] Figure 1 It is the three-dimensional structure schematic view of the utility model structure;

[0015] Figure 2 It is Figure 1 The structure schematic view of shaft, ring body and radiating fin in it;

[0016] Figure 3 It is Figure 1 The structure schematic view of first sleeve body and arc-shaped groove in it;

[0017] Figure 4For Figure 1 Structure diagram of the first sleeve body, the arc-shaped groove and the first hole body.

[0018] In the figure: 1, rotating shaft; 2, ring body; 3, first sleeve body; 4, second sleeve body; 5, arc-shaped groove; 6, cooling fin; 7, key groove; 8, first hole body; 9, second hole body; 10, bolt. DETAILED DESCRIPTION

[0019] The embodiments of the present application will be further described below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0020] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] Please refer to Figures 1 to 4The utility model provides a kind of technical scheme: a motor's rotating shaft structure for coaxial bridge, including rotating shaft 1, rotating shaft 1 is connected with multiple groups of ring body 2, multiple groups of ring body 2 are equipped with first sleeve body 3 and second sleeve body 4, first sleeve body 3 and second sleeve body 4 mutually adhere, first sleeve body 3 and second sleeve body 4 are all set with multiple groups of arc grooves 5, multiple groups of arc grooves 5 constitute annular two by two, multiple groups of ring body 2 are placed in corresponding arc grooves 5 respectively, and ring body 2 is matched between arc grooves 5, and the gap similar to labyrinth is constructed.When dust, water vapor, oil stains and other impurities in the outside world try to invade the inside of motor, they need to go along this tortuous and complex labyrinth gap, in this process, most of the impurities will be blocked outside, cannot pass through this sealed defense line smoothly, thereby effectively protecting the winding and bearing and other key components inside motor, while in practical application, lubricant can be added on the contact surface of ring body 2 and arc groove 5.It can be grease lubricant, which is applied on the contact surface to form an oil film, play the role of lubrication and rust prevention, reduce friction and wear.

[0023] Among them, rotating shaft 1 is connected with multiple groups of radiating fins 6, in the motor operation process, rotating shaft 1 as main heat source, will produce a large amount of heat.These heat is rapidly transmitted to radiating fin 6, since radiating fin 6 has larger surface area, can be in full contact with surrounding air, greatly accelerates the exchange of heat.

[0024] Among them, first sleeve body 3 one end and other end are all set with first hole body 8, second sleeve body 4 one end and other end are all set with second hole body 9, multiple groups of second hole body 9 are all threadedly connected with bolt 10, and multiple groups of bolt 10 are respectively threadedly connected with corresponding first hole body 8.This connection mode facilitates the installation and dismounting of first sleeve body 3 and second sleeve body 4, is convenient for maintenance and overhaul of sealing structure in later period, can also ensure that the two are closely adhered, and will not appear loose phenomenon in the motor operation process, guarantee the stability and reliability of sealing structure.

[0025] Among them, rotating shaft 1 one end is set with keyway 7, can be matched with the key on transmission component, realizes the efficient transmission of motor power.

[0026] Among them, multiple groups of radiating fins 6 are annular array distribution on rotating shaft 1.

[0027] Among them, multiple groups of radiating fins 6 are radial with rotating shaft 1 as center, avoid that heat is excessively gathered in local area, thereby optimizing heat dissipation path, maintaining motor each part temperature balance, effectively reduce thermal stress caused by temperature difference, significantly improve the reliability and stability of motor.

[0028] The specific use mode and action of the embodiment:

[0029] The utility model discloses a motor cover is provided with first sleeve body 3 and second sleeve body 4, and the first sleeve body 3 and the second sleeve body 4 are connected with the ring body 2 of rotating shaft 1, and the ring body 2 is arranged in the arc-shaped recess 5 of the first sleeve body 3 and the second sleeve body 4, and the ring body 2 and the arc-shaped recess 5 form a labyrinth seal structure.

[0030] The above merely describes a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, and all should be covered in the protection scope of the utility model.

Claims

1. A shaft structure for a coaxial bridge motor, characterized in that: Includes a rotating shaft (1), at which multiple sets of ring bodies (2) are connected. Each set of ring bodies (2) is provided with a first sleeve (3) and a second sleeve (4). The first sleeve (3) and the second sleeve (4) fit together. Each of the first sleeve (3) and the second sleeve (4) has multiple sets of arc-shaped grooves (5). The multiple sets of arc-shaped grooves (5) form a ring in pairs. The multiple sets of ring bodies (2) are placed in the corresponding arc-shaped grooves (5).

2. The shaft structure of a coaxial bridge motor according to claim 1, characterized in that: Multiple heat sinks (6) are connected to the rotating shaft (1).

3. The shaft structure of a coaxial bridge motor according to claim 1, characterized in that: The first sleeve (3) has a first hole (8) at one end and the other end, and the second sleeve (4) has a second hole (9) at one end and the other end. Multiple sets of second holes (9) are threaded with bolts (10), and the multiple sets of bolts (10) are threaded to the corresponding first holes (8).

4. The shaft structure of a coaxial bridge motor according to claim 1, characterized in that: A keyway (7) is provided at one end of the rotating shaft (1).

5. The shaft structure of a coaxial bridge motor according to claim 2, characterized in that: Multiple sets of heat sinks (6) are arranged in a ring array on the rotating shaft (1).

6. The shaft structure of a coaxial bridge motor according to claim 2, characterized in that: The multiple heat sinks (6) are arranged radially with the rotating shaft (1) as the center.

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