A noise-reducing motor output shaft device with clearance compensation

Abstract

The present invention discloses a noise reduction motor output shaft device with clearance compensation, comprising a motor output shaft, a clearance compensation wheel, a C-shaped spring, and a retaining spring. A C-shaped spring is installed at the end of the motor output shaft. The C-shaped spring can cooperate with the clearance compensation wheel through the end. The clearance compensation wheel is installed on the motor output shaft. The retaining spring fixes the clearance compensation wheel in the annular groove of the motor output shaft. The outer splines of the motor output shaft and the outer splines of the clearance compensation wheel are staggered with each other through the elastic action of the C-shaped spring. When cooperating with the inner splines of the rotor shaft, the outer splines of the motor output shaft and the outer splines of the clearance compensation wheel are respectively in contact with one side of the inner splines of the rotor shaft. When the motor is started, whether it is forward transmission or flipping, there is no gap between the inner splines of the rotor and the outer splines of the motor output shaft, so there will be no impact, and no damage to the splines or impact noise will occur. The service life of the motor output shaft is improved and the noise during the working process is reduced.

Description

Technical Field

[0001] The invention relates to a noise-reducing motor output shaft device with clearance compensation, belonging to the technical field of electric motors. Background Art

[0002] The motor output shaft is a component that connects the motor rotor and the external transmission device, and its purpose is to reliably output the power of the motor to the outside. At present, the motor rotor shaft and the motor output shaft are mostly connected by splines for power transmission. However, there is a gap between the internal and external splines, and the internal and external splines will wear as the motor works for a longer time. After wear, the gap between the internal and external splines will also become larger. When the motor is started or reversed, due to the existence of the gap, there will be impact between the internal and external splines, which will not only increase the noise of the motor, but also damage the splines under the action of the impact force, thereby reducing the service life of the motor shaft. Therefore, it is a technical problem that needs to be solved urgently by those skilled in the art to provide a motor output shaft that can automatically compensate for the gap between the internal and external splines, reduce noise, and have a long service life. Summary of the invention

[0003] In view of the above problems, the present invention provides a noise-reducing motor output shaft device with clearance compensation to solve the noise and service life problems caused by the clearance between the existing spline structure connecting the motor rotor and the motor output shaft, and the gap gradually increasing with wear.

[0004] The technical solution adopted by the present invention to solve the technical problem is: A noise reduction motor output shaft device with clearance compensation includes a motor output shaft, a clearance compensation wheel, a C-shaped spring, and a retaining spring. The motor output shaft is provided with an external spline, and a C-shaped spring is installed at the end of the motor output shaft. The C-shaped spring can be matched with the clearance compensation wheel through the end. The clearance compensation wheel is installed on the motor output shaft. The retaining spring fixes the clearance compensation wheel in the annular groove of the motor output shaft.

[0005] Furthermore, the clearance compensation wheel is provided with an external spline. To realize the function of the present invention, the external spline of the clearance compensation wheel is staggered with the external spline on the motor output shaft by a certain angle under the action of the annular spring. The external splines of the motor output shaft and the clearance compensation wheel are in contact with both sides of the internal spline of the rotor shaft. When the motor is running forward or reversed, the internal spline of the rotor shaft and the external spline of the motor output shaft will not impact each other, thus avoiding the generation of noise and prolonging the service life of the spline.

[0006] In the above-mentioned noise reduction motor output shaft device with clearance compensation, the motor output shaft is provided with an external spline, and the external spline of the motor output shaft cooperates with the internal spline of the rotor shaft to transmit torque. The end face of the motor output shaft is provided with an annular groove, and the annular groove is used to install the C-shaped spring. There is a cylindrical protrusion in the annular groove, and the cylindrical protrusion is used to fix the C-shaped spring. The end of the motor output shaft is provided with an axial diameter, and the axial diameter is used to install the clearance compensation wheel. In order to better realize the function of the present invention, the outer edge surface of the axial diameter is provided with an annular groove for placing the retaining ring to axially fix the clearance compensation wheel.

[0007] In the above-mentioned noise-reducing motor output shaft device with clearance compensation, the clearance compensation wheel is provided with an external spline with the same parameters as the motor output shaft, and the clearance compensation wheel external spline and the motor output shaft external spline are used together to transmit torque. The end of the clearance compensation wheel has a cylindrical protrusion to cooperate with the inclined surface end of the C-shaped spring. A hole is provided in the middle of the clearance compensation wheel, and the clearance compensation wheel is installed on the shaft diameter of the end of the motor output shaft through the middle hole.

[0008] In the above-mentioned noise reduction motor output shaft device with clearance compensation, one end of the C-shaped spring has a round hole for being installed on the cylindrical protrusion in the annular groove at the end of the motor output shaft to fix the C-shaped spring. The other end of the C-shaped spring is an inclined surface, which cooperates with the clearance compensation wheel to push the external spline on the clearance compensation wheel to stagger with the external spline on the motor output shaft by a certain angle.

[0009] The above-mentioned noise reduction motor output shaft device with clearance compensation is inserted into the inner spline of the rotor shaft and can transmit the torque of the rotor shaft outward.

[0010] The beneficial effects of the present invention are: The present invention makes the outer splines of the motor output shaft and the outer splines of the clearance compensation wheel staggered with each other through the elastic action of the C-shaped spring. When matching with the inner splines of the rotor shaft, the outer splines of the motor output shaft and the outer splines of the clearance compensation wheel are each in contact with one side of the inner splines of the rotor shaft. When the motor is started, whether it is forward or reverse, there is no gap between the inner splines of the rotor and the outer splines of the motor output shaft, so there will be no impact, and no damage to the splines or impact noise. The service life of the motor output shaft is improved and the noise during the working process is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the composition of the present invention; Figure 2 1 is a schematic diagram of the structure of the motor output shaft 1; Figure 3 2 is a schematic diagram of the structure of the gap compensation wheel 2; Figure 4 3 is a schematic diagram of the structure of the C-shaped spring; Figure 5 It is the schematic diagram of the motor output shaft assembly; Figure 6 It is a schematic diagram of the motor output shaft principle.

[0012] The markings in the figure are as follows: motor output shaft 1, motor output shaft external spline 11, motor output shaft annular groove 12, motor output shaft diameter 13, motor output shaft retaining ring groove 14, motor output shaft cylindrical protrusion 15, clearance compensation wheel 2, clearance compensation wheel external spline 21, clearance compensation wheel cylindrical protrusion 22, clearance compensation wheel inner hole 23, C-shaped spring 3, C-shaped spring bevel end 31, C-shaped spring mounting hole 32, retaining ring 4, rotor shaft 5, rotor shaft inner spline 51. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] Figure 1 The composition diagram of the present invention is shown as follows: the noise reduction motor output shaft device with clearance compensation comprises a motor output shaft 1, a clearance compensation wheel 2, a C-shaped spring 3, and a retaining spring 4. The rotor shaft 5 is a matching component with the noise reduction motor output shaft device with clearance compensation.

[0015] Figure 2 The schematic diagram of the structure of the motor output shaft 1 is shown, wherein the motor output shaft 1 is provided with a motor output shaft external spline 11, and the motor output shaft external spline 11 cooperates with the rotor shaft internal spline 51 to transmit torque. The end face of the motor output shaft 1 is provided with a motor output shaft annular groove 12, and the motor output shaft annular groove 12 is used to install the C-shaped spring 3. The motor output shaft annular groove 12 is provided with a motor output shaft cylindrical protrusion 15, and the motor output shaft cylindrical protrusion 15 is used to fix the C-shaped spring 3. The end of the motor output shaft 1 is provided with a motor output shaft diameter 13, and the motor output shaft diameter 13 is used to install the clearance compensation wheel 2. The outer edge surface of the motor output shaft diameter 13 is provided with a motor output shaft retaining ring groove 14, which is used to place the retaining ring 4 and axially fix the clearance compensation wheel 2.

[0016] Figure 3The figure shows a schematic diagram of the structure of the clearance compensation wheel 2. The clearance compensation wheel 2 is provided with a clearance compensation wheel external spline 21 with the same parameters as the motor output shaft. The clearance compensation wheel external spline 21 and the motor output shaft external spline 11 are used to transmit torque. The end of the clearance compensation wheel 2 is provided with a clearance compensation wheel cylindrical protrusion 22 to cooperate with the C-shaped spring inclined surface end 31. The clearance compensation wheel 2 is provided with a clearance compensation wheel inner hole 23 in the middle. The clearance compensation wheel 2 is installed on the shaft diameter 13 of the motor output shaft through the clearance compensation wheel inner hole 23 in the middle.

[0017] Figure 4 The figure shows a schematic diagram of the structure of the C-shaped spring 3. A C-shaped spring mounting hole 32 is provided at one end of the C-shaped spring 3 for mounting on the cylindrical protrusion 15 of the motor output shaft to fix the C-shaped spring 3. The other end of the C-shaped spring 3 is a C-shaped spring bevel end 31, which cooperates with the clearance compensation wheel 2 to push the clearance compensation wheel external spline 21 and the motor output shaft external spline 11 to stagger at a certain angle.

[0018] Figure 5 The figure shows a schematic diagram of the motor output shaft after assembly, wherein the clearance compensation wheel 2 is assembled on the motor output shaft diameter 13 of the motor output shaft 1, and is clamped into the motor output shaft clamping groove 14 through the clamping spring 4 to limit the axial movement of the clearance compensation wheel 2. After assembly, the clearance compensation wheel outer spline 21 of the clearance compensation wheel 2 is offset from the motor output shaft outer spline 11 of the motor output shaft 1 by a small angle under the action of the C-shaped spring 3.

[0019] Working principle: Figure 6 The figure shows a schematic diagram of the principle of the motor output shaft. For better explanation, the clearance compensation wheel 2 in the schematic diagram only shows one spline (indicated in black) among the clearance compensation wheel outer splines 21 and the clearance compensation wheel cylindrical protrusion 22 (indicated in black), and the rotor shaft 5 only shows two splines (with section lines) among the rotor shaft inner splines 51.

[0020] The C-shaped spring mounting hole 32 at one end of the C-shaped spring 3 cooperates with the cylindrical protrusion 15 of the motor output shaft, and the C-shaped spring inclined surface end 31 at the other end of the C-shaped spring 3 contacts the cylindrical protrusion 22 of the clearance compensation wheel.

[0021] Under the action of the C-shaped spring 3, when the noise reduction motor output shaft device with clearance compensation is inserted into the rotor shaft inner spline 51 of the rotor shaft 5, the motor output shaft outer spline 11 will be offset by a small angle with the clearance compensation wheel outer spline 21. The motor output shaft outer spline 11 will contact the left side of the rotor shaft inner spline 51, and the clearance compensation wheel outer spline 21 will contact the right side of the rotor shaft inner spline 51.

[0022] Under the effect of this optimized structure, when the rotor shaft 5 rotates clockwise, the internal spline 51 of the rotor shaft will first drive the external spline 11 of the motor output shaft to rotate, and then under the elastic buffering of the C-shaped spring 3, the internal spline 51 of the rotor shaft will slowly contact with the external spline 21 of the clearance compensation wheel, and no impact and noise will be generated during the contact.

[0023] When the rotor shaft 5 rotates counterclockwise, it will first drive the outer spline 21 of the clearance compensation wheel to rotate, and then under the elastic buffering of the C-shaped spring 3, the inner spline 51 of the rotor shaft will slowly contact with the outer spline 11 of the motor output shaft, and no impact and noise will be generated during the contact.

[0024] Even if the motor output shaft outer spline 11, the clearance compensation wheel outer spline 21 and the rotor shaft inner spline 51 are worn due to long-term use of the motor, under the action of the C-shaped spring 2, the motor output shaft outer spline 11 and the clearance compensation wheel outer spline 21 will be in tight contact with the rotor shaft inner spline 51 to avoid impact and noise.

[0025] It should be noted that the above examples are only specific embodiments of the present invention, and all variations that can be directly derived or associated with the disclosed content of the present invention by a person skilled in the art should be considered as falling within the protection scope of the present invention.

Claims

1. A noise reduction motor output shaft device with clearance compensation, characterized in that: The noise reduction motor output shaft device with clearance compensation comprises a motor output shaft 1, a clearance compensation wheel 2, a C-shaped spring 3, and a retaining spring 4. The rotor shaft 5 is a matching component with the noise reduction motor output shaft device with clearance compensation, the clearance compensation wheel 2 and the C-shaped spring 3 are mounted on the motor output shaft 1, and the retaining spring 4 is used to fix the clearance compensation wheel 2. After assembly, the noise reduction motor output shaft device with clearance compensation can be inserted into the rotor shaft inner spline 51 in the rotor shaft 5.

2. The noise reduction motor output shaft device with clearance compensation according to claim 1 is characterized in that: The motor output shaft 1 is provided with a motor output shaft external spline 11, and the end face of the motor output shaft 1 is provided with a motor output shaft annular groove 12, and the motor output shaft annular groove 12 is used to install the C-shaped spring 3. A motor output shaft cylindrical protrusion 15 is provided in the motor output shaft annular groove 12, and the motor output shaft cylindrical protrusion 15 is used to fix the C-shaped spring 3. The end of the motor output shaft 1 is provided with a motor output shaft diameter 13, and the motor output shaft diameter 13 is used to install the gap compensation wheel 2. The outer edge surface of the motor output shaft diameter 13 is provided with a motor output shaft retaining ring groove 14, which is used to place the retaining ring 4 to axially fix the gap compensation wheel 2.

3. The noise reduction motor output shaft device with clearance compensation according to claim 1 is characterized in that: The clearance compensating wheel 2 is provided with a clearance compensating wheel external spline 21, and a clearance compensating wheel cylindrical protrusion 22 is provided at the end of the clearance compensating wheel 2 for cooperating with the C-shaped spring inclined surface end 31, and a clearance compensating wheel inner hole 23 is provided in the middle of the clearance compensating wheel 2. The clearance compensating wheel 2 is mounted on the shaft diameter 13 of the motor output shaft through the clearance compensating wheel inner hole 23 in the middle.

4. The noise reduction motor output shaft device with clearance compensation according to claim 1 is characterized in that: A C-shaped spring mounting hole 32 is provided at one end of the C-shaped spring 3 for mounting on the cylindrical protrusion 15 of the motor output shaft to fix the C-shaped spring 3. The other end of the C-shaped spring 3 is a C-shaped spring bevel end 31, which cooperates with the clearance compensation wheel 2 to push the clearance compensation wheel external spline 21 and the motor output shaft external spline 11 to be staggered at a certain angle.

5. The noise reduction motor output shaft device with clearance compensation according to claim 1 is characterized in that: The clearance compensation wheel 2 is assembled on the motor output shaft diameter 13 of the motor output shaft 1, and is clamped into the motor output shaft retaining ring groove 14 through the retaining ring 4 to limit the axial movement of the clearance compensation wheel 2. After the assembly is completed, the clearance compensation wheel external spline 21 of the clearance compensation wheel 2 is offset from the motor output shaft external spline 11 of the motor output shaft 1 by a certain angle under the action of the C-shaped spring 3.

6. The noise reduction motor output shaft device with clearance compensation according to claim 1 is characterized in that: The noise reduction motor output shaft device with clearance compensation can be inserted into the inner spline 51 of the rotor shaft in the rotor shaft 5. Under the action of the C-shaped spring 2, the outer spline 11 of the motor output shaft and the outer spline 21 of the clearance compensation wheel will be in tight contact with the inner spline 51 of the rotor shaft to avoid impact and noise.

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