CN213473282U

CN213473282U - Tubular column type electronic steering engine servo mechanism with shock-absorbing gasket

Info

Publication number: CN213473282U
Application number: CN202021997154.XU
Authority: CN
Inventors: 董行; 华丹丹; 姜卓
Original assignee: Bosch Huayu Steering Systems Co Ltd
Current assignee: Bosch Huayu Steering Systems Co Ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-06-18
Anticipated expiration: 2030-09-14

Abstract

The utility model belongs to the technical field of tube column type electron steering gear technique and specifically relates to a tube column type electron steering gear servo with vibration damping shim, including reduction gears, servo motor, ring gear, vibration damping shim, reduction gears's worm tip is equipped with tooth hub one, and servo motor's motor shaft tip is equipped with tooth hub two, and tooth hub one installs the ring gear with tooth hub two is outer, and tooth hub two end inlays and is equipped with vibration damping shim, and vibration damping shim's outer lane is located between tooth hub one and the tooth hub two, and vibration damping shim's inner circle is located between reduction gears's worm and servo motor's the motor shaft. Compared with the prior art, the utility model, increase damping shim between two tooth hubs of reduction gears and servo motor to weaken the axial float of worm, noise reduction risk and moment of torsion are undulant, increase the design robustness. And meanwhile, a damping effect is provided when the worm swings, so that knocking when the worm swings is inhibited. The damping washer is general type design, can be applied to each column type electron steering engine.

Description

Tubular column type electronic steering engine servo mechanism with shock-absorbing gasket

Technical Field

The utility model belongs to the technical field of tube column type electron turns to machine technique and specifically relates to a tube column type electron turns to machine servo with shock attenuation gasket.

Background

In the current servo mechanism design of the tubular column type electronic steering engine, a speed reducing mechanism and a servo motor mainly depend on two gear hubs and a gear ring to be matched with and transmit torque and speed. The gear hub on the reduction mechanism side is restrained by a grub screw.

In operation, when the electric steering is subjected to external force, the servo motor can provide assistance to drive the worm wheel to assist in steering. While the worm is given by the reaction force generated by the worm wheel, the worm is thus subjected to axial and radial forces. Although the worm is restrained by bearings on two sides, due to bearing play and fit clearance, the worm still generates certain axial displacement under the impact of axial force, so that certain noise and torque fluctuation risks can be generated; meanwhile, when the road passes through a bumpy road surface, excitation of the road surface is transmitted to the worm through the worm wheel, the worm swings by taking the pendulum bearing as a fulcrum, and noise risks are also generated.

Therefore, it is desirable to design a servo mechanism of a column type electric steering gear with a damping pad to reduce noise and torque fluctuation risk.

Disclosure of Invention

The utility model aims at overcoming the not enough of prior art, provide a tubular column type electronic steering engine servo with shock attenuation gasket to the undulant risk of noise reduction and moment of torsion.

In order to achieve the purpose, the utility model relates to a tubular column type electronic steering engine servo with damping shim, including reduction gears, servo motor, ring gear, damping shim, reduction gears's worm tip is equipped with tooth hub one, servo motor's motor shaft tip is equipped with tooth hub two, tooth hub one and the two outer ring gear of installing of tooth hub, tooth hub both ends are inlayed and are equipped with damping shim, damping shim's outer lane is located between tooth hub one and the tooth hub two, damping shim's inner circle is located between reduction gears's worm and servo motor's the motor shaft.

The worm is connected with the first gear hub through a flat head screw.

A swing bearing is arranged at one position, close to the gear hub, of the end part of the worm, and a spring is arranged below the other end part of the worm.

Compared with the prior art, the utility model, increase damping shim between two tooth hubs of reduction gears and servo motor to weaken the axial float of worm, noise reduction risk and moment of torsion are undulant, increase the design robustness. And meanwhile, a damping effect is provided when the worm swings, so that knocking when the worm swings is inhibited. The damping washer is designed in a universal mode, and can be widely applied to various tubular column type electronic steering machines.

Drawings

Fig. 1 is a schematic view of the present invention.

Fig. 2 is a force diagram of the present invention.

Detailed Description

The invention will now be further described with reference to the accompanying drawings.

Referring to fig. 1, the utility model relates to a tubular column type electronic steering engine servo with damping shim, including reduction gears, servo motor, ring gear, damping shim, reduction gears 1-A tip of worm is equipped with tooth hub one 1-C, servo motor 2's motor shaft tip is equipped with tooth hub two 2-a, tooth hub one 1-C and tooth hub two 2-a install the ring gear 3 outward, tooth hub two 2-a tip inlays and is equipped with damping shim 4, damping shim 4's outer lane is located between tooth hub one 1-C and tooth hub two 2-a, damping shim 4's inner circle is located between reduction gears 1's worm 1-A and servo motor 2's motor shaft. The damping gasket 4 is mainly made of rubber materials and plays a role in damping and buffering.

In the utility model, the worm 1-A is connected with the gear hub 1-C by a flat head screw 1-D. A swing bearing 1-B is arranged at the position, close to the first gear hub 1-C, of the end part of the worm 1-A, and a spring 1-E is arranged below the other end part of the worm 1-A.

The utility model discloses when the assembly, at two 2-a tip embedding shock attenuation gasket 4 of gear hub of servo motor 2, then with reduction gears 1 and the cooperation of ring gear 3, will be equipped with reduction gears 1 of ring gear 3 at last and be equipped with 2 assembly of servo motor of shock attenuation gasket 4 together.

Referring to fig. 2, in operation, when the worm 1-a is under the axial force F1 and the radial force F2 of the worm wheel, the radial torque T formed by the radial force F2 causes the worm 1-a to swing with the swing bearing 1-B as a pivot, and at the same time, under the action of the spring 1-E, the worm 1-a is under the spring torque M1 formed by the spring force F1. Under the action of the shock-absorbing pad 4, the lower side of the end of the worm 1-A receives a reverse action torque M2 formed by a reverse action force f2 from the shock-absorbing pad 4. The spring torque M1 and the reverse action torque M2 can effectively reduce the impact generated by the swinging of the worm, thereby preventing the knocking between the worm wheel and the worm caused by the swinging and avoiding the generation of noise.

Meanwhile, because the worm 1-A is subjected to the axial force F1 of the worm wheel, although the worm 1-A is axially fixed by the bearing, the axial movement of the worm 1-A can be caused in consideration of the bearing clearance and the fit clearance, so that noise is caused, and the damping gasket 4 can compensate the axial movement of the worm 1-A, balance the requirements of the bearing clearance and the fit clearance and prevent the noise risk.

The utility model discloses increase damping shim 4 between two tooth hubs of reduction gears 1 and servo motor 2 to weaken worm 1-A's axial float, noise reduction risk and moment of torsion are undulant, increase the design robustness. Meanwhile, a damping effect is provided when the worm 1-A swings, and then knocking when the worm 1-A swings is restrained. The damping washer 4 is designed in a general type and can be widely applied to various tubular column type electronic steering machines.

Claims

1. The utility model provides a tubular column formula electronic steering engine servo with shock attenuation gasket, includes reduction gears, servo motor, ring gear, shock attenuation gasket, and worm (1-A) tip of reduction gears (1) is equipped with tooth hub one (1-C), and the motor shaft tip of servo motor (2) is equipped with tooth hub two (2-a), installs ring gear (3) its characterized in that outward with tooth hub two (2-a) tooth hub one (1-C): a damping gasket (4) is embedded at the end part of the second gear hub (2-a), the outer ring of the damping gasket (4) is positioned between the first gear hub (1-C) and the second gear hub (2-a), and the inner ring of the damping gasket (4) is positioned between the worm (1-A) of the speed reducing mechanism (1) and the motor shaft of the servo motor (2).

2. The servo mechanism of the column type electric steering gear provided with the shock absorption gasket as claimed in claim 1, wherein: the worm (1-A) is connected with the first gear hub (1-C) through a flat head screw (1-D).

3. The servo mechanism of the column type electric steering gear provided with the shock absorption gasket as claimed in claim 1, wherein: a swing bearing (1-B) is arranged at the position, close to the gear hub I (1-C), of the end part of the worm (1-A), and a spring (1-E) is arranged below the other end part of the worm (1-A).