JPS59199436A - Device for assembling tie rod - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic assembly device for rod ends and tie rods that form part of a rack and pinion type steering for an axle.

A rack and pinion type steering device, which has been widely used as a conventional axle steering device, is, for example, a first
As shown in the figure, a rod end 1a and a tie rod 2a are screwed onto a rack shaft 2A that moves left and right as the handle shaft IA rotates, and are fixed by a lock nut 3a to form a steering device. The work of screwing together the Tyronodome and further tightening the lock nut 3a is done manually, which requires a large number of man-hours, which becomes a serious obstacle to production as the production volume increases.

The present invention provides a tie rod assembly device for a rack and pinion type steering device that saves a large amount of manual assembly man-hours, which has been a problem in the past, and greatly improves labor productivity.

Next, a typical embodiment of the tie rod assembly device according to the present invention shown in FIG. 2 will be explained. FIG. 1 is an explanatory view showing the main part of the embodiment of the tie rod assembly device according to the present invention, and the reference numeral l in the figure is A rod end as a rod end member, 2 a quick rod as a tie rod member, 3 a lock nut, 4 a screw-in holder, 5 a screw-in motor, 6 a removal cylinder, 7 a pressing cylinder, 71
72 is a pusher, 8 is an open end wrench, 9 is an open end wrench removal cylinder, 10 is a contact winch, and 101 is a swing arm.

The structure and operation of the device will be briefly explained with reference to FIG. Insert 40 holders into the internal thread 21 at one end, with a slight temporary screw L, and a gap t of approximately one foot between the lock nut 3 and the end surface of the tie rod 2. 2
When the opposite end of the internal thread 21 is sandwiched between the pusher 7 operated by the suppressing cylinder turf, and the lock nut 3 is held non-rotatably by the detent arm 72 and the open end wrench 8, the screw motor 5 is The rod end part 1 is rotated and the tie rod member 2
It is arranged so that it is automatically screwed together.

The lock nut 3 and the tie rod 2, which are screwed together with this shoji screen, are screwed together with an almost constant gap t. When the lock nut 3 reaches a predetermined position, The arm 101 of the contact switch 10 that has been set is pressed and tilted, and the operation of the switch 10 stops the rotation of the screw-in motor 5 that rotates the screw-in holder 4 that holds the rod end 1, completing the screw connection. .

Next, an open-end wrench 8 for tightening the lock nut, which is rotated by air with a slight torque, is attached to the lock nut 3.
The lock nut 3 (61) is tightened to the end face of the tie rod 2 with a certain torque to fix the rod end 1 and the tie rod 2, and the rank end assembly is completed. There is.

The almost constant distance t between the lock nut 3 and the tie rod 2 provided on the shoji screen acts as a tightening allowance for the lock nut 3 and helps stabilize the tightening torque of the lock nut 3. The open-end wrench 8 has a wrench part 81 at the tip that rotates twice, and when the lock nut 3 has been tightened, the applied torque is confirmed with a pressure winch (not shown), and the open-end wrench 8 is tightened by the cylinder 9. Move in the axial direction0 At this time, the wrench part 81Vi is automatically removed from the lock nut, and the opening of the wrench part 81 rotates to the position where the rod end 1 can be removed. The holder 4 is moved back by the operation of the removal cylinder 6, allowing the product to be removed, and the worker counts the number of products (one cycle is completed by removal).

The dice equipment 1 has multiple units arranged in multiple stages, as described above in this figure, so that one worker can operate multiple units at the same time. Just screw the lock at 3 onto the screw 1 and attach it to the internal thread of the tie rod 2 using the assembly device invented by Doko.
In addition to being able to thread the tie rods 2 and tighten the lock nuts 3, labor productivity is extremely high because multiple units can be operated. Since the torque with M is also confirmed, the quality is completely guaranteed as a safety part. In this example, the lot end is rotated, but this is not the only option. Alternatively, the tie rod 2 may be rotated in the opposite direction.

[Brief explanation of the drawing]

FIG. 1 is an external view of a currently used rack and pinion type steering device, and FIG. 2 is an explanatory view of a tie rod assembly device according to the present invention. In the figure, 1 is a rod end, 2 is a tie rod, 3 is a locking nut, 4 is a holder, 5 is a spring motor,
6 is a sushi cylinder, 7 is a gentle pressure cylinder, 71
is a pusher, 72 is a rotation stopper arm, 8 is an oven end wrench, 9 is an oven end wrench removal cylinder, IO is a contact switch, and 101 is a switch arm. Patent applicant: NSK Ltd.

Claims (1)

[Claims] (1) An assembly device for screwing together a rod end member having a thread on its outer circumferential surface and a tie rod member having an inner thread on its end face, which forms a part of a rack and pinion type steering, and fixing them with a hole. , A lock nut was previously screwed onto the thread on the outer peripheral surface, and a small gap of approximately one foot was left between the end face of the tie rod member and the first lock nut, and the two members were temporarily screwed together. Holding the lock nand and tie rod members of the product unrotatably,
Automatic screwing means for holding and rotating the rod end member and screwing the two members together, and automatic position detection for detecting the position of the lock nand or tie rod member that moves due to the screwing and stopping the screwing. (2) In claim 1, the automatic position detecting screw stopper is actuated by contact with the lock nut. Contacts 1 type tie rod assembly device.