KR100342775B1 - Jointing structure of rack bar for vehicle steering system - Google Patents

Abstract

The present invention relates to a rack bar and a joint connection structure of a vehicle steering apparatus, and includes a ratchet formed in a reverse direction to be fastened to each other at end ends of the rack bar and the joint, thereby improving the tightening force, simplifying the production process and the work process. In other words, the aim is to reduce costs and labor.

Characteristic means for this is the female thread is formed in the hollow of one end, the ratchet (ratchet) formed in the shape of the tooth on the end surface is arranged radially and the male thread is formed on the protruding rod of one end, the end of the rack bar on the end surface A ratchet formed in the reverse direction to engage the ratchet consists of a radially arranged joint.

Description

Connection structure of rack bar and joint of automobile steering system {JOINTING STRUCTURE OF RACK BAR FOR VEHICLE STEERING SYSTEM}

The present invention relates to a rack bar and a joint connection structure of an automobile steering apparatus, comprising a pinion gear shaft receiving a torsional rotational force from a universal joint connected to a steering shaft, and a rack for engaging the pinion gear shaft to convert the rotational force to left and right axial motion. One side of the rack is installed with the piston member inside the cylinder to move in accordance with the hydraulic pressure in the hydraulic cylinder, the other side is formed with the rack gear engaged with the pinion gear, the rotational force transmitted from the pinion gear is a horizontal movement force To be converted to, both ends of the rack bar is connected to the joint member to be connected to the wheel, the connection portion of the rack bar and the joint is covered from the outside by the bellows pipe.

The structure of the conventional rack bar and the joint used as described above is as shown in FIG.

1 is an exploded perspective view of a conventional rack bar and an inner ball joint, and includes a rack bar 1 having a hollow 12 at one end having a female screw 13 and a protruding rod 22 having a male screw 23 formed therein. One inner ball joint 2 and washer 3 are shown.

As shown in FIG. 2, the rack bar 1 having the washer is fitted, the hollow 12 of the inner ball joint 2, and the protrusion bar 22 are screwed together, and the washer 3 is caulked to the inner ball joint. Protect the connection with a bellows tube (4).

However, the conventional rack bar and inner ball joints are complicated to produce and assemble parts such as screw parts and threaded protrusions through separate machining operations, and the work process for caulking washers is cumbersome. If the caulking is poor, the rack bar wine ball joint is loosened because of the weak tightening force.

The present invention, which is intended to solve the conventional problems as described above, relates to a rack bar and a joint connection structure of the vehicle steering apparatus, to form a ratchet (ratchet) fastened to each other on the end surface of the rack bar and the joint, to improve the fastening force In other words, the production process and work process are simplified, and the cost and labor cost are reduced.

Characteristic means for this is the female thread is formed in the hollow of one end, the ratchet (ratchet) formed in the shape of the tooth on the end surface is arranged radially and the male thread is formed on the protruding rod of one end, the end of the rack bar on the end surface A ratchet formed in the reverse direction to engage the ratchet consists of a radially arranged joint.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of a conventional rack and joint

2 is a cross-sectional view of the conventional rack and joint coupling

3 is an exploded perspective view of a rack and a joint of the present invention

4 is a cross-sectional view of the combination of the rack and the subject innovation

<Description of Drawing>

1: rack bar 2: joint

3: washer 12: hollow

13: female thread 23: male thread

22: protruding rod 14: end of the first ratchet

24: the second ratchet teeth 15: the first ratchet teeth

25: the second ratchet root 16: the first ratchet slope

26: second ratchet slope 4: bellow

3 is an exploded perspective view of the rack bar 1 and the inner ball joint 2 of the present invention, the rack bar 1 is

A hollow 12 having a female screw 13 formed at one end thereof, and a first ratchet radially disposed at one end thereof, and the joint 2 has a protruding rod 22 having a male screw 23 formed at one end thereof. And a second ratchet formed in a reverse direction so as to radially engage the first ratchet on the end face.

As shown in FIG. 4, when the hollow 12 of the female threaded rack bar and the protruding rod 22 of the male threaded inner ball joint are screwed together, the end 14 of the first ratchet of the rack bar is the second of the inner ball joint. When the tooth tip 24 of the ratchet touches, the tooth tip 14 of the first ratchet slides onto the inclined surface 26 of the second ratchet due to the force exerted by the producer on the parts and the softness of each part. As 14) reaches the tooth root 25 of the second ratchet, a clamping force is generated and cannot move in the reverse direction.

Therefore, loosening is prevented due to the fastening force of the rack bar and the inner ball joint.

As described above, the present invention does not caulk the washer inserted into the fastening portion of the rack bar and the inner ball joint to the inner ball joint, and forms a reverse ratchet so as to be engaged with each other at one end surface of the rack bar and the joint. By eliminating the manufacturing process and caulking process, the production process and assembly process of racks and joints are simplified, and the labor and cost are reduced.

Claims (1)

In the rack bar and the inner ball joint of the steering device for cars, The rack bar has a hollow portion formed with a female thread, and forms a radial first ratchet at one end surface thereof. The inner ball joint is provided with a protruding rod formed with a male thread, and provided with a second ratchet formed radially at one end surface in a reverse direction to engage the first ratchet of the rack bar, thereby preventing loosening when the female screw and the male screw are fastened. Connection structure of the rack bar and the joint, characterized in that to be made.