CN111327158A - Universal air cooling servo motor - Google Patents

Abstract

The invention discloses a general type air-cooled servo motor which comprises an end cover, a stator, a rotor, a machine shell, a bearing, a protective cover, a fan and a fan cover, wherein the stator is arranged on the inner cavity of the machine shell; the outer side part of the shell and the rear end cover are provided with inner air ducts which are matched with each other, the fan cover is provided with an air inlet, the matching part of the front end cover and the shell is provided with an air outlet, and the air inlet, the air outlet and the inner air ducts are communicated with each other. According to the universal air-cooled servo motor, the design and manufacturing scheme of the synchronous servo motor and the asynchronous servo motor are integrated, the development cost, the mold cost and the like of motor parts during production and manufacturing are reduced, and the cost of an external air shell can be reduced by one-step stretch forming of the air duct in the shell and the shell.

Description

Universal air cooling servo motor

Technical Field

The invention relates to a servo motor, in particular to a universal air cooling servo motor.

Background

With the rapid development of modern manufacturing industry, the cost of the servo motor is gradually reduced, the technology is gradually mature, and the servo motor becomes a mainstream motor of each mechanical device by virtue of the advantages of high control precision, good performance, strong overload capacity and the like. The servo motors can be divided into a synchronous servo motor and an asynchronous servo motor, and the traditional motor factories have different manufacturing standards for synchronization and asynchronization, which mainly reflect that the motor mounting sizes are different and motor parts can not be shared. However, the two motors are structurally limited to be different from the stator and the rotor, the main parts of the motors can be the same as the main parts of the motor, such as the shell, the end cover, the wire box, the fan cover, the fan and the like, so that the size of the motor cannot be universally replaced and the defect that the design needs to be frequently changed by a user is obviously exposed when the servo is widely applied, particularly when the user replaces the original common motor and the original variable frequency motor, and meanwhile, the production cost and the management cost of a motor factory are increased.

Can produce multiple loss when servo motor normal operating, these losses all can make the motor casing generate heat, produce the phenomenon of rising the temperature, under ideal state, if the motor can distribute away the motor heat at any time, the motor temperature rise is zero promptly, as long as the mechanical strength of motor is enough to guarantee, the motor can output infinitely large power, therefore the heat dispersion of motor has decided the size of motor power, it is the important approach that improves motor power to improve motor radiating effect promptly, and it is little to have a heat radiating area among the present servo motor air-cooled structure, the cooling effect is poor, very big restriction the promotion of motor power, and better heat dispersion structure has the production and processing complicacy again, drawback that cost price is high.

The Chinese patent discloses an air cooling device (CN 102332782A) of a servo motor, wherein an air cooling shell is covered outside a shell of the servo motor, an annular air duct is formed between the shells at the front end of the air cooling shell, the rear end of the air cooling shell extends out of the shell and a centrifugal fan is arranged in the air cooling shell corresponding to the rear end of the shell, the centrifugal fan is fixed on a rear flange, a cylindrical air cooling shell is coaxially covered outside the shell of the motor, a gap is formed between the front end of the air cooling shell and the shell and serves as an air duct, air is sucked from the rear part and radially discharged after the centrifugal fan is operated, the radial air flow collides with the inner wall of the air cooling shell and then flows along the air duct to the front side, and the air flow forms heat dissipation through the surface of the shell. This is rational in infrastructure, and the heat dissipation is effective, nevertheless because the forced air cooling casing is assembled to take 8 tensile aluminium alloy to form, because tensile aluminium alloy can take place the certain degree at tensile in-process and warp, causes the forced air cooling casing to assemble the difficulty, and 8 numbers are more, and drawing machining dimension is all inequality, is difficult to distinguish, and processing and assembly concatenation are inefficient, because the die sinking of needs is made simultaneously, has increased the development cost and the manufacturing cost of product.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to solve the defects in the prior art, provides the air cooling servo motor heat dissipation structure which is compact in structure, good in heat dissipation effect, simple in assembly and low in manufacturing cost, and solves the problems in the background technology.

The technical scheme is as follows: the invention relates to a general type air-cooled servo motor which comprises an end cover, a stator, a rotor, a shell, a bearing, a protective cover, a fan and a fan cover, wherein the stator is arranged on an inner cavity of the shell; the fan is characterized in that inner air ducts which are matched with each other are arranged on the outer side portion of the shell and the rear end cover, an air inlet is formed in the fan cover, an air outlet is formed in the matching position of the front end cover and the shell, and the air inlet, the air outlet and the inner air ducts are communicated with each other.

Further, the stator and the rotor respectively include two types of synchronous and asynchronous.

Further, the outer diameter of the stator and the rotor of the synchronous type and the outer diameter of the rotor of the asynchronous type are the same.

Furthermore, the first bearing and the second bearing adopt deep groove ball bearings.

Further, a gland is arranged between the second bearing and the rotor.

Furthermore, the protection casing is the certain angle setting.

Further, the angle is set to 30-60 °.

Furthermore, the inner side surface of the inner air duct adopts a sawtooth structure.

Furthermore, a plurality of heat dissipation ribs are arranged on the surface of the machine shell.

Furthermore, a wire box and a box cover are fixedly arranged above the rear end cover.

Has the advantages that: the universal air-cooled servo motor reduces development cost, mold cost, processing and management cost of motor parts during production and manufacturing by integrating design and manufacturing schemes of a synchronous servo motor and an asynchronous servo motor, so that the universal air-cooled servo motor can share various parts such as a shell, an end cover, a wire box, a fan cover, a fan and the like except a stator and a rotor area, an air channel in the shell and the shell are formed by one-step stretching, and the cost of an external air shell can be reduced.

Drawings

FIG. 1 is a schematic view of an integrally installed explosive structure of the present invention;

fig. 2 is a structural sectional view of the motor of the present invention;

FIG. 3 is a schematic view of the overall installation of the present invention;

fig. 4 is a schematic view of the structure of the inner air duct in the motor of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As shown in fig. 1 to 4, the general air-cooled servo motor includes a front end cover 1, a rear end cover 9, a stator 4, a rotor 3, a casing 5, a first bearing 2, a second bearing 8, a protective cover 12, a fan 13, and a fan housing 14, where the stator 4 is installed on an inner cavity of the casing 5, the rotor 3 is fixed on a rotating shaft and is supported and suspended inside the stator 4 through the first bearing 2 and the second bearing 8 at two ends, the front end cover 1 is installed at one end of the casing 5, the rear end cover 9 is installed at the other end of the casing 5, the fan housing 14 is installed outside the rear end cover 9, and the protective cover 12 and the fan 13 are installed inside the fan housing 14; the air conditioner is characterized in that inner air ducts which are matched with each other are arranged on the outer side portion of the shell 5 and the rear end cover 9, an air inlet is arranged on the fan cover 14, an air outlet is arranged at the matching position of the front end cover 1 and the shell 5, and the air inlet, the air outlet and the inner air ducts are communicated with each other.

As a further optimization of the above embodiment:

in this embodiment, preferably, in order to implement a universal production, the stator 4 and the rotor 3 are divided into an asynchronous stator and a synchronous stator, wherein the asynchronous stator and the synchronous stator have the same outer diameter, so that all the asynchronous stator and the synchronous stator can be adapted to the casing, and the casing, the end cover, the wire box, the fan housing, the fan and other parts are designed based on the size of the stator, so as to implement a universal design requirement.

By integrating the design and manufacturing scheme of the synchronous servo motor and the asynchronous servo motor, the development cost, the die cost, the processing and management cost of motor parts during production and manufacturing are reduced, so that the motor parts except for a stator and a rotor region can share the same shell, end cover, wire box, fan cover, fan and other parts, an air channel in the shell and the shell are formed in a one-step stretching mode, and the cost of an external air shell can be reduced.

In this embodiment, preferably, the first bearing 2 and the second bearing 8 adopt deep groove ball bearings, and the deep groove ball bearings mainly bear radial loads and can also bear radial loads and axial loads at the same time. When it is subjected to only radial loads, the contact angle is zero. When the deep groove ball bearing has larger radial play, the deep groove ball bearing has the performance of an angular contact bearing, can bear larger axial load, has small friction coefficient and high limit rotating speed.

Deep groove ball bearings are the most commonly used rolling bearings. It has simple structure and convenient use. The bearing is mainly used for bearing radial load, but when the radial play of the bearing is increased, the bearing has certain performance of an angular contact ball bearing and can bear combined radial and axial load. When the rotating speed is high and the thrust ball bearing is not suitable to be adopted, the thrust ball bearing can be used for bearing pure axial load. Compared with other types of bearings with the same specification and size of the deep groove ball bearing, the bearing has the advantages of small friction coefficient and high limit rotating speed. But is not impact resistant and is not suitable for bearing heavy loads.

After the deep groove ball bearing is installed on the shaft, the axial displacement of the shaft or the shell in two directions can be limited within the axial play range of the bearing, so that the axial positioning can be carried out in two directions. In addition, the bearing has certain aligning capability, and can still work normally when the bearing is inclined by 2 'to 10' relative to the shell hole.

Preferably, in this embodiment, in order to ensure stable operation of the rotor, a gland 7 is installed between the second bearing 8 and the rotor 3, and the gland 7 has a certain limit to the rotor 3 and the second bearing 8, so as to ensure good operation of the rotor.

In the embodiment, preferably, the protection cover 12 is disposed at an angle; furthermore, the angle is set to be 30-60 degrees, the inclination angle can be used as an airflow guide function, airflow from the air inlet at the fan cover is guided to the rear end cover and the inner air duct in the shell, and the airflow guide function is achieved. Wherein the height of the protection cover 12 has a tendency to gradually decrease from the inner air duct to the fan housing side. An encoder can be installed in the protective cover.

In this embodiment, preferably, the four corners of the housing are respectively provided with an inner air duct, and an inner side surface of the inner air duct adopts a zigzag structure, as shown in fig. 4. By adopting the sawtooth-shaped inner air duct, the contact area of the surface and the air can be increased, and the heat dissipation effect is improved.

In this embodiment, preferably, in order to further increase the heat dissipation effect, the surface of the housing 5 is provided with a plurality of exposed heat dissipation ribs 6, and the heat dissipation ribs 6 are made of a heat conductive material, such as aluminum or copper.

In this embodiment, preferably, a wire box 10 and a box cover 11 are fixedly mounted above the rear end cover 9, so as to facilitate wire connection.

The working principle of the fan is as follows:

when the fan runs, air is sucked from the air inlet at the tail part and then is axially discharged, axial airflow flows to the air channel and the radiating ribs in the shell along the inclination after colliding with the surface of the protective cover, and the airflow flows through the whole surface of the shell through the air channel to absorb heat and is discharged to the air.

The universal air-cooled servo motor reduces development cost, mold cost, processing and management cost of motor parts during production and manufacturing by integrating design and manufacturing schemes of a synchronous servo motor and an asynchronous servo motor, so that the universal air-cooled servo motor can share various parts such as a shell, an end cover, a wire box, a fan cover, a fan and the like except a stator and a rotor area, an air channel in the shell and the shell are formed by one-step stretching, and the cost of an external air shell can be reduced.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. The utility model provides a forced air cooling servo motor of general type which characterized in that: the motor comprises an end cover, a stator (4), a rotor (3), a casing (5), a bearing, a protective cover (12), a fan (13) and a fan cover (14), wherein the stator (4) is installed on an inner cavity of the casing (5), the rotor (3) is fixed on a rotating shaft and is supported and suspended inside the stator (4) through a first bearing (2) and a second bearing (8) at two ends, a front end cover (1) is installed at one end of the casing (5), a rear end cover (9) is installed at the other end of the casing (5), the fan cover (14) is installed on the outer side of the rear end cover (9), and the protective cover (12) and the fan (13) are installed in the fan cover (14); the fan is characterized in that inner air ducts which are matched with each other are arranged on the outer side portion of the shell (5) and the rear end cover (9), air inlets are formed in the fan cover (14), air outlets are formed in the matching positions of the front end cover (1) and the shell (5), and the air inlets, the air outlets and the inner air ducts are communicated with each other.

2. The universal air-cooled servo motor as claimed in claim 1, wherein: the stator (4) and the rotor (3) are respectively of a synchronous type and an asynchronous type.

3. The universal air-cooled servo motor as claimed in claim 2, wherein: the outer diameter of the stator (4) and the rotor (3) of the synchronous type and the asynchronous type are the same.

4. The universal air-cooled servo motor as claimed in claim 1, wherein: the first bearing (2) and the second bearing (8) adopt deep groove ball bearings.

5. The universal air-cooled servo motor as claimed in claim 1, wherein: a gland (7) is arranged between the second bearing (8) and the rotor (3).

6. The universal air-cooled servo motor as claimed in claim 1, wherein: the protective cover (12) is arranged at a certain angle.

7. The universal air-cooled servo motor as claimed in claim 6, wherein: the angle is set to 30-60 °.

8. The universal air-cooled servo motor as claimed in claim 1, wherein: the inner side surface of the inner air duct adopts a sawtooth structure.

9. The universal air-cooled servo motor as claimed in claim 1, wherein: a plurality of radiating ribs (6) are arranged on the surface of the shell (5).

10. The universal air-cooled servo motor as claimed in claim 1, wherein: and a wire box (10) and a box cover (11) are fixedly arranged above the rear end cover (9).

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