CN206948104U - A powertrain with shock and noise reduction functions - Google Patents

Abstract

The utility model discloses a power assembly with shock absorption and noise reduction functions, which comprises a motor, a shaft, a speed changer, a bearing assembly and an O-shaped ring, wherein the speed changer is arranged on one side of the motor in a manner of being close to the end surface of the motor; two ends of the shaft are respectively connected to the motor and the transmission, and the shaft is connected with the output end of the motor; the bearing assembly comprises a first bearing and a second bearing, the first bearing and the second bearing are respectively sleeved on the shaft at intervals along the axial direction of the shaft, and outer rings of the first bearing and the second bearing are connected with the transmission shell so as to enable the shaft to freely rotate in the transmission shell; o type circle sets up between second bearing and derailleur casing, and O type circle is the elasticity material to shock attenuation and noise reduction when the axle is rotatory. The utility model discloses a duplex bearing structure, the subshaft both ends are supported spacingly, have effectively reduced because of the rocking problem that the axle overlength leads to, simultaneously, carry out elastic buffer through elastomeric element between bearing and gearbox housing, effectively reduce vibrations and abnormal sound.

Description

A powertrain with shock and noise reduction functions

technical field

The utility model relates to the field of motor manufacturing, in particular to a power assembly with the function of shock absorption and noise reduction.

Background technique

Motor generally refers to all machines that can convert mechanical energy into electrical energy, and electrical energy into mechanical energy; it refers specifically to generators, electrical energy machines, and motors; it refers to an electromagnetic device that realizes the conversion or transmission of electrical energy according to the law of electromagnetic induction. Motors are also commonly known as Motor, its main function is to generate driving torque. As the power source of electrical appliances or various machinery, motors are widely used in modern industrial production. They are often designed in conjunction with transmissions. The speed control of the output shaft of the motor is realized through the transmission to meet Various use occasions; traditional motors and transmissions generally adopt a dual-shaft assembly structure, that is, the output shaft of the motor and the input shaft of the transmission are set independently, and the two shafts are connected by couplings or keys; Due to the impact of assembly accuracy and wear and tear of the output shaft after long-term use, the coaxiality decreases, resulting in transmission errors, and the troubleshooting is difficult. It is impossible to directly conclude that the motor output shaft or the transmission input shaft is faulty; and the transmission path is long. The transmission efficiency is low and the manufacturing cost is high; therefore, there has been a kind of combination of the motor output shaft and the transmission input shaft, which can effectively solve the above problems through the integrated shaft design; however, this kind of integrated shaft design, in the test The problem that occurred during the verification process was that the vibration and abnormal noise were large when the shaft was rotating. After troubleshooting, it was found that the reason for the above problems was that the length of the integrated shaft was long, and the two ends of the shaft were prone to shaking when rotating, and the shaft was rotating. When the swing angle or distance at both ends is inconsistent.

Utility model content

The technical problem to be solved by the utility model is to provide a double-bearing structure for the above-mentioned deficiencies in the prior art, and support and limit from both ends of the shaft, which effectively reduces the shaking problem caused by the shaft being too long. Elastic cushioning is performed between the bearing and the transmission housing through elastic components, which effectively reduces vibration and abnormal noise, and is a powertrain with shock and noise reduction functions.

The technical scheme adopted by the utility model is as follows: a power assembly with the function of shock absorption and noise reduction, including a motor, a shaft, a transmission, a bearing assembly and an O-ring, wherein the above-mentioned transmission is arranged on one side of the motor close to the end face of the motor The two ends of the above-mentioned shaft are respectively connected to the motor and the transmission, the shaft is connected to the output end of the motor, and inserted into the transmission through the motor; the above-mentioned bearing assembly includes a first bearing and a second bearing, and the first bearing and the second bearing are respectively Sleeved on the shaft at intervals along the axial direction of the shaft, the outer rings of the first bearing and the second bearing are connected with the transmission case so that the shaft can rotate freely in the transmission case; the above-mentioned O-ring is arranged between the second bearing and the transmission case Between the transmission housings, the O-rings are made of elastic material for shock absorption and noise reduction when the shaft rotates.

Preferably, the shaft is provided with a stepped support ring surface, and the above-mentioned first bearing or the second bearing is sleeved on the stepped support ring surface and supported by the stepped support ring surface.

Preferably, the inner side wall of the transmission housing is provided with an annular slot, the second bearing is embedded in the annular slot, the right end surface of the second bearing is close to the step support ring surface, and passes through the step support ring surface from the Axial limit in the right direction, an elastic ring is provided between the left end face of the second bearing and the end face of the annular socket, so that the annular socket axially restricts the second bearing from the left direction and at the same time provides the second bearing through the elastic ring One elastic cushioning force.

Preferably, an oil seal is provided on the left side of the second bearing.

Preferably, the fit gap between the annular slot and the second bearing is 0.05mm to 0.08mm.

Preferably, an annular groove is provided on the groove wall of the annular socket, the above-mentioned O-ring is embedded in the annular groove, and the ring body diameter of the O-ring is greater than the height of the annular groove, and the inner ring wall of the O-ring Extends out of the annular groove and against the outer ring sidewall of the second bearing.

The beneficial effects of the utility model are:

The utility model improves and innovates the defects and insufficiencies of the existing technology, and designs a double-bearing structure, which supports and limits the two ends of the shaft, effectively reducing the shaking problem caused by the shaft being too long. Elastic cushioning is performed between the bearing and the transmission housing through elastic components, which can effectively reduce vibration and abnormal noise. The powertrain with the function of shock absorption and noise reduction; It specifically solves the problem of vibration and abnormal noise during the rotation of the integrated shaft; firstly, by setting the first bearing and the second bearing at intervals in the axial direction as the supporting and limiting parts of the shaft, the shaft passes through the first bearing and the second bearing. The second bearing rotates freely in the transmission housing; the first bearing located at the left end of the shaft adopts a rigid installation method, and the first bearing is fixedly engaged between the transmission housing and the shaft, and the second bearing close to the motor adopts a flexible installation method, and the second bearing The right end face of the shaft is in rigid contact with the end face of the stepped support ring of the shaft, and an elastic ring is provided between the left end face of the second bearing and the end face of the annular slot on the transmission housing, so as to be supported by the elastic ring to provide the second bearing Elastic support, the left side of the second bearing is also equipped with an oil seal for sealing; in addition, the utility model increases the matching clearance between the second bearing and the annular slot to 0.05mm-0.08mm, and in the ring An annular groove is set on the groove wall of the slot, and an O-ring with a ring body diameter larger than the annular groove is embedded in the annular groove. The side wall of the inner ring of the O-ring extends out of the annular groove and is against the outside of the second bearing. In order to provide the elastic support force of the second bearing, the O-ring can be made of rubber; it has been verified by experiments that the above design can effectively solve the vibration and abnormal noise generated by the integrated shaft during rotation, and effectively improve the service life.

Description of drawings

Fig. 1 is the structural representation of the utility model.

FIG. 2 is a schematic diagram of the enlarged structure at A in FIG. 1 .

detailed description

The utility model will be further described below in conjunction with accompanying drawing:

As shown in Figures 1 to 2, the technical solution adopted by the utility model is as follows: a power assembly with a function of shock absorption and noise reduction, including a motor 1, a shaft 2, a transmission 3, a bearing assembly and an O-ring 6, wherein , the above-mentioned transmission 2 is arranged on one side of the motor 1 close to the end face of the motor 1; the two ends of the above-mentioned shaft 2 are respectively connected to the motor 1 and the transmission 3, and the shaft 2 is connected to the output end of the motor 1 and inserted into the transmission through the motor 1 3; the above-mentioned bearing assembly includes a first bearing 4 and a second bearing 5, the first bearing 4 and the second bearing 5 are respectively sleeved on the shaft 2 along the axial direction of the shaft 2, and the first bearing 4 and the second bearing The outer ring of 5 is connected with the transmission housing so that the shaft 2 can rotate freely in the transmission housing; the above-mentioned O-ring 6 is arranged between the second bearing 5 and the transmission housing, and the O-ring 6 is made of elastic material so that the shaft 2 Shock and noise reduction when rotating.

The shaft 2 is provided with a stepped support ring surface 7 , and the first bearing 4 or the second bearing 5 is sleeved on the stepped support ring surface 7 and supported by the stepped support ring surface 7 .

The inner side wall of the transmission housing is provided with an annular slot 9, and the second bearing 5 is embedded in the annular slot 9. The right end surface of the second bearing 5 is close to the step support ring surface 7, and passes through the step support ring surface 7 from the Axial limit in the right direction, an elastic ring 10 is provided between the left end face of the second bearing 5 and the end face of the annular socket 9, so that the annular socket 9 axially restricts the second bearing 5 from the left direction, The first elastic buffering force is provided by the elastic ring 10 .

The left side of the second bearing 5 is provided with an oil seal 11 .

The matching gap between the annular slot 9 and the second bearing 5 is 0.05mm to 0.08mm.

An annular groove 8 is opened on the groove wall of the annular socket 9, and the above-mentioned O-ring 6 is embedded in the annular groove 8, and the ring body diameter of the O-ring 6 is greater than the height of the annular groove 8, and the inner ring of the O-ring 6 The wall extends out of the annular groove 8 and against the side wall of the outer ring of the second bearing 5 .

Further, the utility model has designed a double-bearing structure, which supports and limits the two ends of the shaft, which effectively reduces the shaking problem caused by the shaft being too long. Elastic cushioning, effectively reducing the vibration and abnormal noise of the powertrain with the function of shock absorption and noise reduction; Vibration and abnormal noise problems; First, by setting the first bearing and the second bearing at intervals in the axial direction as the supporting and limiting parts of the shaft, the shaft can freely rotate in the transmission housing through the first bearing and the second bearing; The first bearing at the left end of the shaft adopts a rigid installation method. The first bearing is fixedly engaged between the transmission casing and the shaft. The second bearing close to the motor adopts a flexible installation method. The right end surface of the second bearing is in contact with the stepped support ring surface of the shaft The end faces are in rigid contact, and an elastic ring is provided between the left end face of the second bearing and the end face of the annular slot on the transmission housing, so as to be supported by the elastic ring to provide elastic support for the second bearing. The left side of the second bearing is also An oil seal is provided for sealing; in addition, the utility model increases the matching gap between the second bearing and the annular slot to 0.05mm-0.08mm, and sets an annular groove on the groove wall of the annular slot, and Embed an O-ring with a diameter larger than the ring groove in the ring groove, and the side wall of the inner ring of the O-ring extends out of the ring groove and is against the outer wall of the second bearing to provide elastic support for the second bearing , The O-ring can be made of rubber; it has been verified by experiments that the above design can effectively solve the vibration and abnormal noise generated by the integrated shaft during rotation, and effectively improve the service life.

The embodiment of the utility model is only to introduce its specific implementation, not to limit its protection scope. Those skilled in the industry can make some modifications under the inspiration of this embodiment, so all equivalent changes or modifications made according to the patent scope of the utility model all belong to the scope of the patent claims of the utility model.

Claims (6)

1. A kind of 1. power assembly for possessing shock-absorbing denoising function, it is characterised in that：Including motor（1）, axle（2）, speed changer（3）、 Bearing assembly and O-ring（6）, wherein, above-mentioned speed changer（3）It is adjacent to motor（1）End face is arranged at motor（1）Side；It is above-mentioned Axle（2）Both ends be connected to motor（1）With speed changer（3）On, axle（2）With motor（1）Output end connection, and through electricity Machine（1）Insert speed changer（3）It is interior；Above-mentioned bearing assembly includes clutch shaft bearing（4）And second bearing（5）, clutch shaft bearing（4）And the Two bearings（5）Respectively along axle（2）Axial direction interval be set in axle（2）On, clutch shaft bearing（4）And second bearing（5）It is outer Circle is connected with case of transmission, to make axle（2）Motion is rotated freely in transmission case body；Above-mentioned O-ring（6）It is arranged at Two bearings（5）Between case of transmission, O-ring（6）For flexible material, so as to axle（2）Damping and noise reduction during rotation.
2. A kind of 2. power assembly for possessing shock-absorbing denoising function according to claim 1, it is characterised in that：Described axle （2）It is provided with step support anchor ring（7）, above-mentioned clutch shaft bearing（4）Or second bearing（5）It is set in step support anchor ring（7） On, and anchor ring is supported by step（7）Support.
3. A kind of 3. power assembly for possessing shock-absorbing denoising function according to claim 2, it is characterised in that：Described speed change The madial wall of device housing is provided with annular caulking groove（9）, second bearing（5）It is embedded in annular caulking groove（9）It is interior, second bearing（5）'s Right side is adjacent to step support anchor ring（7）, and support anchor ring through step（7）From right direction axial limiting, second bearing（5）'s Left side and annular caulking groove（9）End face between be provided with elastic ring（10）, so as to annular caulking groove（9）From left direction axial limiting Second bearing（5）While, pass through elastic ring（10）First time elastic buffer power is provided.
4. A kind of 4. power assembly for possessing shock-absorbing denoising function according to claim 3, it is characterised in that：Described second Bearing（5）Left side be provided with oil sealing（11）.
5. A kind of 5. power assembly for possessing shock-absorbing denoising function according to claim 4, it is characterised in that：Described annular Caulking groove（9）With second bearing（5）Between fit clearance be 0.05mm to 0.08mm.
6. A kind of 6. power assembly for possessing shock-absorbing denoising function according to claim 4, it is characterised in that：Described annular Caulking groove（9）Cell wall on offer annular groove（8）, above-mentioned O-ring（6）It is embedded in annular groove（8）It is interior, and 0 type circle（6）Circle body Diameter is more than annular groove（8）Height, O-ring（6）Inner ring wall extend to annular groove（8）Outside, and second bearing is propped up（5）'s Outer ring side wall.