CN112298351A

CN112298351A - Steering gear idler bar

Info

Publication number: CN112298351A
Application number: CN201910681020.2A
Authority: CN
Inventors: 卓志颖; 卓志铭
Original assignee: Jingyi Enterprise Co ltd
Current assignee: Jingyi Enterprise Co ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2021-02-02

Abstract

A steering gear idle rod comprises a ball head seat, a ball rod and an intermediate piece. The ball head at one end of the club is connected with the ball socket of the ball socket and can swing or rotate, and the ball head is divided into a first hemispherical part and a second hemispherical part by taking a circle tangent as a boundary; the intermediate piece is arranged in the ball socket and located between the ball head seat and the ball head, and comprises a first bushing and a second bushing, wherein the first bushing is located on the left side of the circle tangent line and wraps the first hemispherical portion, the second bushing is partially located on the right side of the circle tangent line and wraps the second hemispherical portion, and a part of the second bushing is located on the left side of the circle tangent line and wraps the first hemispherical portion of the second bushing. Thereby strengthening the effect of the steering gear idler rod on the tensile resistance.

Description

Steering gear idler bar

Technical Field

The present invention relates to steering power systems; in particular to a power machine idle rod capable of improving the tensile strength.

Background

The combination of an inner tie rod end and a tie rod ball end is known as a side tie rod, and belongs to a steering system. The steering gear idler rod is used for connecting a steering rack to a steering pull rod connected with wheels and is one of important parts of a steering system between a steering wheel and a tire; the steering gear idle rod is mainly used for a rack gear in a steering system, converts force into horizontal force by using the circular motion of a pinion, transmits the horizontal force to left and right wheels, and absorbs transverse and longitudinal acting force in driving.

Fig. 1 shows a conventional idle bar 1 of a steering gear, which is disclosed to be composed of a ball mount 2 and a ball bar 3. The ball head seat 2 has a ball socket 2a, one end of the club 3 forms a ball head 3a and is combined in the ball socket 2a, so that the club 3 can rotate or swing relative to the ball head seat 2, and in addition, the ball head seat 2 has a closing end edge 2b which slightly covers the ball head 3a, so as to prevent the club 3 from separating relative to the ball head seat 2. In order to reduce the wear of the ball head 3a in the ball socket 2a caused by long-term contact friction, the known direction machine idle rod 1 is made of high-strength forged steel, and hardened and tempered by heat treatment to ensure the durability and wear resistance, and a bushing 4(bearing) is often placed between the ball head socket 2 and the ball head 3a to reduce the wear therebetween.

Although the steering gear idle rod 1 has good driving performance, the mode that the binding end edge 2b of the ball head seat 2 slightly covers the ball head 3a is obviously insufficient for absorbing the pulling force from the transverse direction in the driving process, and the lining 4 is of a bowl-shaped structure, but the function of the lining is only to strengthen the wear resistance and is not helpful to provide additional resistance, so that the existing steering gear idle rod 1 is not perfect and needs to be improved.

Disclosure of Invention

Accordingly, the present invention is directed to an idler bar for a steering gear box, which has an improved effect of absorbing a pulling force from a lateral direction.

The present invention provides a steering gear idle rod, which comprises a head seat, a ball rod and an intermediary member, wherein the head seat has a ball socket, one end of the ball rod forms a ball head and is combined in the ball socket, a central line is defined to pass through the head seat and the ball head, the ball head defines a circle tangent line vertical to the central line, and the ball head is divided into a first semi-sphere part and a second semi-sphere part by taking the circle tangent line as a boundary; the intermediate piece is arranged in the ball socket and positioned between the ball head seat and the ball head, and is provided with a first coating part and a second coating part, wherein the first coating part coats the first hemispherical part, and the second coating part coats the second hemispherical part and at least one part of the first hemispherical part.

In one embodiment, the intermediate member includes a first bushing and a second bushing, the first bushing constitutes the first cladding portion, the second bushing constitutes the second cladding portion, and the hardness of the first bushing is less than the hardness of the second bushing.

In one embodiment, the ball socket has a converging end edge extending to the second hemispherical portion of the ball head, and the aperture of the ball socket at the passing of the circular tangent line is larger than that at the converging end edge.

In one embodiment, the ball socket of the ball socket is composed of a first hole section and a second hole section, the aperture of the first hole section is smaller than that of the second hole section, and a shoulder is formed at the connection position of the first hole section and the second hole section; the first bushing is disposed in the first bore section, and the second bushing is disposed in the second bore section and abuts against the shoulder.

The effect of the invention is that the second cladding part of the medium piece simultaneously wraps the second hemispherical part of the ball head and part of the first hemispherical part, thereby strengthening the effect of the direction machine idle rod on tensile resistance.

Drawings

FIG. 1 is a cross-sectional view of a known traversing mechanism idler bar;

FIG. 2 is a perspective view of a steering gear idler bar in accordance with a preferred embodiment of the present invention;

FIG. 3 is an exploded view of the steering gear idler bar of the above preferred embodiment of the present invention;

FIG. 4 is a schematic half-section view of the idler bar of the steering gear box of FIG. 3; and

fig. 5 is a sectional view taken in the direction of 5-5 in fig. 2.

Detailed Description

The steering gear idle rod of the invention is suitable for but not limited to a steering system, and comprises a ball rod (ball rod), a ball seat (housing) and an intermediate member, wherein a ball head at one end of the ball rod is connected with a ball socket of the ball seat to swing or rotate, the intermediate member is arranged between the ball head and the ball seat, and the intermediate member is provided with a first coating part and a second coating part for coating the ball head so as to improve the effect of the steering gear idle rod on absorbing transverse tension.

In order to more clearly illustrate the present invention, a preferred embodiment will be described in detail below with reference to the accompanying drawings. Referring to fig. 2 and 3, a steering gear idle rod 100 according to a preferred embodiment of the present invention includes a ball seat 10(housing), a ball 20(ball rod), and an intermediary member, wherein the ball seat 10 has a ball socket 12 recessed from an end surface, one end of the ball 20 forms a ball 22, the intermediary member includes a first bushing 30 and a second bushing 40, the first bushing 30 forms the first covering portion, the second bushing 40 forms the second covering portion, the first bushing 30 and the second bushing 40 are annular structures and are sequentially inserted into the ball socket 12, the ball 22 of the ball 20 is inserted into the first bushing 30 and the second bushing 40 to be indirectly coupled to the ball socket 12, so that the ball 20 can swing or rotate with the coupling point as a fulcrum.

Referring to fig. 4 and 5, the steering gear idle rod 100 defines a horizontal center line H passing through the ball seat 10 and the ball head 22, the ball head 22 defines a circular tangent V passing through the center C and perpendicular to the center line H, and a point where a tangent parallel to the center line H intersects the circular tangent V is a tangent point P. The ball head 22 is divided into a left half and a right half by taking the circle tangent V as a boundary, the left half is defined as a first hemispherical portion 22a, the right half is defined as a second hemispherical portion 22b, the first bushing 30 is located on the left side of the circle tangent V and covers the first hemispherical portion 22a, the second bushing 40 is partially located on the right side of the circle tangent V and covers the second hemispherical portion 22b, and another part of the second bushing 40 is located on the left side of the circle tangent V and covers the first hemispherical portion 22 a; more specifically, first bushing 30 has a first inner abutment surface 32 that engages the spherical surface of first hemispherical portion 22a, and second bushing 40 has a second inner abutment surface 42 that engages not only the spherical surface of second hemispherical portion 22b, but also a portion of the spherical surface of first hemispherical portion 22 a. The ball seat 10 is formed with a converging end 14 at a position close to the port 12a of the ball 12, that is, the converging end 14 extends to the second hemispherical portion 22b of the ball 22 and is formed by reducing the aperture of the port 12a through clamping and pressing deformation, that is, the aperture of the ball seat 10 at the passing position of the circular tangent V is larger than that at the converging end 14; the tapered end 14 presses against the second bushing 40 to retain the ball 22 in the socket 12 to prevent separation of the club 20 from the headstock 10.

The above description is for the idle bar 100 of the steering gear of the preferred embodiment of the present invention, in which the first bushing 30 and the second bushing 40 are located between the ball seat 10 and the ball 22, the wear between the inner wall of the ball 12 of the ball seat 10 and the surface of the ball 22 can be reduced to prolong the service life, and in addition, the first and

second bushings

30, 40 may be made of the same material, such as chrome molybdenum steel with good wear resistance, or different materials, for example, the first bushing 30 is made of thermoplastic polyurethane, the second bushing 40 is made of chrome molybdenum steel, through the configuration of different material hardness (the hardness of the first bushing 30 is less than that of the second bushing 40), the steering idler rod 100 can appropriately bear the thrust or the tension from the transverse direction during the steering movement, namely, the first bushing 30 bears the transverse thrust and the second bushing 40 bears the transverse tension.

It should be noted that when the cue 20 is subjected to a pulling force from the lateral direction, the closing end 14 of the cue seat 10 resists a part of the pulling force, and the second bushing 40 also has a part thereof located on the left side of the tangent V and covering a part of the first hemispherical portion 22a, so as to enhance the effect of resisting the pulling force, thereby improving the overall strength of the direction machine idle bar 100.

In one embodiment, in order to ensure that a portion of the second bushing 40 can cover a portion of the first hemispherical portion 22a and the position of the assembled second bushing 40 is fixed, the ball socket 12 of the socket 10 is manufactured to include a first hole section 121 and a second hole section 122, the hole diameter of the first hole section 121 is smaller than the hole diameter of the second hole section 122, and a shoulder 123 is formed at the connection portion of the first hole section 121 and the second hole section 122, the shoulder 123 is located at the left side of the circle tangent V and corresponds to the first hemispherical portion 22a of the ball 22, so that when the first bushing 30 is placed in the first hole section 121 and the second bushing 40 is placed in the second hole section 122, one side of the second bushing 40 abuts against the shoulder 123 and cannot move to the first hole section 121, and accordingly, the position of the second bushing 40 is determined.

In other implementations, the intermediate member may be an integrated bowl-shaped structure, and the first covering portion and the second covering portion are divided according to the covering range, and the caliber of the second covering portion at the end edge thereof is such that the ball 22 of the club 20 can pass through, after the ball 22 completely enters the intermediate member, the ball seat 10 is pressed at the proximal port 12a while the end edge of the second covering portion is deformed, so as to prevent the club 20 from separating from the ball seat 10.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications to the present invention as described and claimed should be included in the scope of the present invention.

Description of the reference numerals

[ invention ]

100 steering gear idle rod

10 ball seat

12 ball socket 12a port 14 binding end edge

121 first bore section 122 second bore section 123 shoulder

20 club

22 ball head 22a first hemispherical portion 22b second hemispherical portion

30 first bush

32 first internal contact surface

40 second bushing

42 second inner contact surface

C center of sphere

H center line

Point of tangency of P

V-shaped circle tangent line

Claims

1. A steering idler rod, comprising a ball head seat and a ball rod, the ball head seat has a ball socket, one end of the ball rod is formed with a ball head and is combined in the ball socket, wherein a ball head is defined. The center line passes through the ball head seat and the ball head; it is characterized in that:

The ball head defines a circular tangent perpendicular to the center line, and the ball head is divided into a first hemispherical portion and a second hemispherical portion with the circular tangent as a boundary;

an intermediate member disposed in the ball socket and between the ball head seat and the ball head, the intermediate member has a first covering part and a second covering part, wherein the first covering part The covering part covers the first hemispherical part, and the second covering part covers the second hemispherical part and at least a part of the first hemispherical part.

2. The idler rod of claim 1, wherein the ball socket has a converging end edge extending to the second hemispherical portion of the ball socket, and the ball socket is at the passage of the circular tangent. The aperture is larger than the aperture at the convergent end edge.

3. The steerer idler rod according to claim 1 or 2, wherein the intermediate member comprises a first bushing and a second bushing, the first bushing constitutes the first covering portion, so The second bushing constitutes the second covering portion, and the hardness of the first bushing is smaller than that of the second bushing.

4. The idler rod of claim 3, wherein the first bushing is made of thermoplastic polyurethane, and the second bushing is made of chrome molybdenum steel.

5. The idler rod of the steering wheel according to claim 3, wherein the ball socket of the ball socket is composed of a first hole section and a second hole section, and the diameter of the first hole section is smaller than that of the second hole section. The diameter of the hole segment, and the connection between the first hole segment and the second hole segment forms a shoulder; the first bushing is arranged in the first hole segment, and the second bushing is arranged in the second hole segment and abut against the shoulder.

6. The idler rod of claim 5, wherein the shoulder portion is located on one side of the tangent to the circle and corresponds to the first hemispherical portion of the ball head.