Gap adjusting mounting mechanism for double-worm-gear steering gear

Abstract

The utility model discloses a double worm gear steering gear clearance adjusting installation mechanism which comprises a bearing shell, a plurality of cylindrical rollers and an expansion cushion block, one side of the bearing shell is provided with an inner raceway, the plurality of cylindrical rollers are installed on the inner wall of the inner raceway in the circumferential direction of the inner raceway, and the circle center of the outer ring of the bearing shell and the circle center of the inner raceway are eccentrically arranged. Wherein an expansion cushion block is clamped between every two adjacent cylindrical rollers, an extension ring is arranged on the other side of the bearing shell, a positioning groove is formed in the outer wall of the extension ring and arranged in the circumferential direction of the extension ring, the extension ring is provided with a channel part, a sealing groove set is formed in the other side of the bearing shell, and at least two pin holes are formed in the other side of the bearing shell. Through the application of the gap adjusting mounting mechanism for the double-worm-gear steering gear, the meshing gap between the worm gear and the worm can be adjusted, the assembly is simple, and the assembly precision is good.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a double worm gear steering gear clearance adjustment installation mechanism. Background Art

[0002] The power steering system of a car includes a steering wheel, a steering shaft, a steering intermediate shaft, a steering oil pipe, a steering oil pump, a steering oil tank, a steering knuckle arm, a steering tie rod, a steering rocker arm, an integral steering gear, a steering straight tie rod, and a steering damper; when the driver turns the steering wheel, the steering gear input shaft is driven to rotate, and the steering rocker arm is driven to swing by the steering straight tie rod, the tie rod, and the steering knuckle arm, so that the steering wheel is deflected, thereby changing the direction of travel of the car. At the same time, the steering gear input shaft also drives the steering control valve inside the steering gear to rotate, so that the steering power cylinder generates hydraulic force to help the driver with steering manipulation. In this way, in order to overcome the steering resistance torque acting on the steering wheel by the ground, the steering torque that the driver needs to add to the steering wheel is much smaller than the steering torque required when using a mechanical steering system. The traditional structure is to use eccentric sleeves and bearings at both ends of the worm shaft for assembly. The meshing clearance between the worm wheel and the worm can be adjusted during assembly, but the meshing clearance cannot be adjusted once assembled. The meshing clearance between the worm wheel and the worm can only be adjusted by changing the tooth thickness and screws. In addition, due to the non-interchangeability of the eccentric bearings, the assembly of the worm and the worm wheel is troublesome, the assembly accuracy is poor, and the assembly time is long, the efficiency is low, and the difficulty is great. Utility Model Content

[0003] In view of this, in order to solve the above problems, the purpose of the utility model is to provide a double worm gear steering gear adjustment clearance installation mechanism, comprising:

[0004] A bearing shell, a plurality of cylindrical rollers and an expansion pad, wherein an inner raceway is provided on one side of the bearing shell, and a plurality of cylindrical rollers are installed on the inner wall of the inner raceway along the circumference of the inner raceway, and the center of the outer ring of the bearing shell is eccentrically arranged with the center of the inner raceway, wherein the expansion pad is clamped between two adjacent cylindrical rollers, and an extension ring is provided on the other side of the bearing shell, and the extension ring is coaxially arranged with the bearing shell, and a positioning groove is provided on the outer wall of the extension ring, and the positioning groove is arranged along the circumference of the extension ring, and the extension ring has a channel portion, and a sealing groove group is provided on the other side of the bearing shell, and the channel portion is connected to the sealing groove group and is coaxially arranged, and at least two pin holes are provided on the other side of the bearing shell, and the axes of the two pin holes are arranged in the same direction as the axis of the bearing shell.

[0005] In another preferred embodiment, the distance between the center of the outer ring of the bearing housing and the center of the inner raceway is 1 mm.

[0006] In another preferred embodiment, the two side walls of the expansion pad are concavely arranged and form two grooves, and the inner walls of the two grooves match the outer walls of the two adjacent cylindrical rollers.

[0007] In another preferred embodiment, an inner wall of one side of the positioning groove and the other side of the bearing housing are located in the same plane.

[0008] In another preferred embodiment, a cross section of a side of the extension ring away from the bearing housing along the axial direction of the bearing housing is arranged in a trapezoidal shape.

[0009] In another preferred embodiment, the sealing groove group includes: a connecting channel and two inner sealing grooves, wherein one side of one of the inner sealing grooves is connected to one side of the channel portion, the other side of the inner sealing groove is connected to one side of the connecting channel, and the other side of the connecting channel is connected to the other inner sealing groove.

[0010] In another preferred embodiment, each of the inner sealing grooves includes a front channel and a rear channel that are connected to each other, and the front channel is arranged in a trapezoidal cross-section along the axial direction of the bearing housing, wherein one side of the front channel is connected to one side of the channel portion, wherein one rear channel is connected to one side of the connecting channel, and one side of the other front channel is connected to the other side of the connecting channel.

[0011] Due to the adoption of the above technical solution, the utility model has the following positive effects compared with the prior art: through the application of the utility model, a double worm gear steering gear adjustment clearance installation mechanism is provided, which can adjust the meshing clearance of the worm gear, is simple to assemble, and has good assembly accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a front view of a double worm gear steering gear gap adjustment installation mechanism of the utility model;

[0013] Figure 2 The utility model is a cross-sectional view of a double worm gear steering gear gap adjustment installation mechanism.

[0014] In the attached drawings: 1. bearing housing; 2. cylindrical roller; 3. expansion pad; 4. inner raceway; 5. pin hole; 6. extension ring; 7. positioning groove; 8. channel part; 9. connecting channel; 10. inner sealing groove; 11. front channel; 12. rear channel. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0016] like Figure 1 and Figure 2As shown, a preferred embodiment of a dual worm gear steering gear gap adjustment installation mechanism is shown, comprising:

[0017] A bearing shell 1, a plurality of cylindrical rollers 2 and an expansion pad 3, an inner raceway 4 is provided on one side of the bearing shell 1, a plurality of cylindrical rollers 2 are installed on the inner wall of the inner raceway 4 along the circumference of the inner raceway 4, the center of the outer ring of the bearing shell 1 is eccentrically arranged with the center of the inner raceway 4, wherein an expansion pad 3 is clamped between two adjacent cylindrical rollers 2, an extension ring 6 is provided on the other side of the bearing shell 1, the extension ring 6 is coaxially arranged with the bearing shell 1, a positioning groove 7 is provided on the outer wall of the extension ring 6, the positioning groove 7 is arranged along the circumference of the extension ring 6, the extension ring 6 has a channel portion 8, a sealing groove group is provided on the other side of the bearing shell 1, the channel portion 8 is connected with the sealing groove group and is coaxially arranged, at least two pin holes 5 are provided on the other side of the bearing shell 1, and the axes of the two pin holes 5 are arranged in the same direction as the axis of the bearing shell 1.

[0018] In actual use, after adjusting the meshing clearance between the worm wheel and the worm, the bearing housing 1 is positioned radially. Specifically, the outer ring edge of the bearing housing 1 is riveted with the structure on the steering gear housing, and then an outer cover is installed outside the bearing housing 1, and a retaining spring that is inserted into the positioning groove 7 on the bearing housing 1 is installed outside the outer cover. Furthermore, a special assembly wrench is inserted into the two pin holes 5 in the eccentric direction to adjust the worm to the correct position of meshing with the worm wheel to meet the assembly requirements of the steering gear.

[0019] Further, as a preferred embodiment, the distance between the center of the outer ring of the bearing housing 1 and the center of the inner raceway 4 is 1 mm. Further, the distance between the center of the outer ring of the bearing housing 1 and the center of the inner raceway 4 is preferably 0.5 mm to 1.5 mm, preferably 1 mm, which greatly improves the performance of the automobile transmission system.

[0020] Further, as a preferred embodiment, the number of the pin holes 5 is four, and the four pin holes 5 are arranged in sequence along the circumference of the bearing housing 1 .

[0021] Furthermore, as a preferred embodiment, the two side walls of the expansion pad 3 are concavely arranged and form two grooves, and the inner walls of the two grooves match the outer walls of the two adjacent cylindrical rollers 2 .

[0022] Further, as a preferred embodiment, the inner wall of one side of the positioning groove 7 is located in the same plane as the other side of the bearing housing 1. Furthermore, the bearing housing 1 is conveniently and quickly installed and fixed by the positioning groove 7 on the extension ring 6 and the snap ring.

[0023] Further, as a preferred embodiment, the side of the extension ring 6 away from the bearing housing 1 has a trapezoidal cross section along the axial direction of the bearing housing 1. Further, the side of the extension ring 6 away from the bearing housing 1 has a trapezoidal cross section along the axial direction of the bearing housing 1 to facilitate the guide function and the installation of the bearing housing 1.

[0024] Further, as a preferred embodiment, the sealing groove group includes: a connecting channel 9 and two inner sealing grooves 10, wherein one side of one inner sealing groove 10 is connected to one side of the channel portion 8, and the other side of the inner sealing groove 10 is connected to one side of the connecting channel 9, and the other side of the connecting channel 9 is connected to another inner sealing groove 10. Further, an oil seal is installed in the inner sealing groove 10, and the lip of the oil seal contacts the shaft to ensure that foreign substances cannot enter the bearing, and the two inner sealing grooves 10 are provided to improve the sealing effect. The oil seal is a conventional technical means in the art and will not be described in detail here.

[0025] Further, as a preferred embodiment, each inner sealing groove 10 includes a front channel 11 and a rear channel 12 that are connected to each other, and the cross section of the front channel 11 along the axial direction of the bearing housing 1 is arranged in a frustum shape, wherein one side of a front channel 11 is connected to one side of the channel portion 8, wherein one rear channel 12 is connected to one side of the connecting channel 9, and one side of another front channel 11 is connected to the other side of the connecting channel 9. Further, the cross section of the front channel 11 along the axial direction of the bearing housing 1 is arranged in a frustum shape, so that the oil seal is more stable when installed.

[0026] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A double worm gear steering gear clearance adjustment installation mechanism, It is characterized in that include: A bearing shell, a plurality of cylindrical rollers and an expansion pad, wherein an inner raceway is provided on one side of the bearing shell, and a plurality of cylindrical rollers are installed on the inner wall of the inner raceway along the circumference of the inner raceway, and the center of the outer ring of the bearing shell is eccentrically arranged with the center of the inner raceway, wherein the expansion pad is clamped between two adjacent cylindrical rollers, and an extension ring is provided on the other side of the bearing shell, and the extension ring is coaxially arranged with the bearing shell, and a positioning groove is provided on the outer wall of the extension ring, and the positioning groove is arranged along the circumference of the extension ring, and the extension ring has a channel portion, and a sealing groove group is provided on the other side of the bearing shell, and the channel portion is connected to the sealing groove group and is coaxially arranged, and at least two pin holes are provided on the other side of the bearing shell, and the axes of the two pin holes are arranged in the same direction as the axis of the bearing shell.

2. The double worm gear steering gear clearance adjustment installation mechanism according to claim 1, It is characterized in that The distance between the center of the outer ring of the bearing housing and the center of the inner raceway is 1 mm.

3. The double worm gear steering gear clearance adjustment installation mechanism according to claim 1, It is characterized in that The two side walls of the expansion pad are concavely arranged and form two grooves, and the inner walls of the two grooves match the outer walls of the two adjacent cylindrical rollers.

4. The double worm gear steering gear clearance adjustment installation mechanism according to claim 1, It is characterized in that An inner wall on one side of the positioning groove and the other side of the bearing housing are located in the same plane.

5. The double worm gear steering gear clearance adjustment installation mechanism according to claim 1, It is characterized in that The cross section of the extension ring at a side away from the bearing housing along the axial direction of the bearing housing is arranged in a trapezoidal shape.

6. The double worm gear steering gear clearance adjustment installation mechanism according to claim 1, It is characterized in that The sealing groove group includes: a connecting channel and two inner sealing grooves, wherein one side of one inner sealing groove is connected to one side of the channel portion, the other side of the inner sealing groove is connected to one side of the connecting channel, and the other side of the connecting channel is connected to the other inner sealing groove.

7. The double worm gear steering gear clearance adjustment installation mechanism according to claim 6, It is characterized in that Each of the inner sealing grooves includes a front channel and a rear channel that are connected to each other, and the front channel is arranged in a trapezoidal cross-section along the axial direction of the bearing housing, wherein one side of the front channel is connected to one side of the channel portion, wherein one rear channel is connected to one side of the connecting channel, and one side of the other front channel is connected to the other side of the connecting channel.

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