JPH02116478A - Hydraulic torque wrench - Google Patents

Abstract

PURPOSE:To perform the rotating work of a lot of different bolts and nuts economically and in a wide range by taking a two body method of inserting a cylinder into a ratchet link forming the main body of a resistant torque. CONSTITUTION:A cylinder part 1 is fitted to the connection part 4 of a ratchet type link part 2 and fixed from the side face of the link connection part 4 by using a ball lock method or set screw. This connection part 4 is formed in a dissimilar shape at its insert part so that the cylinder can resist against reaction force after connection. When a piston rod 5 is advanced, a rod end 6 is guided by the groove 9, 10 of the right and left side plate 7, 8 and advanced by the stroke part of the piston rod. At this time, the driving plate 12 connected by the rod end 6 and a pin 11 performs rotary movement by being guided by an oblong hole 13. A push claw 14 is assembled in the driving plate 12, transmitting the rotating force to a ratchet type rotary shaft 15.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized in that, compared to conventional torque wrenches in which a cylinder is incorporated as a component element in the main body, or wrenches in which the cylinder and main body are integrated, one cylinder part l and a ratchet type link part 2 (main body) are combined. are each independent, and by combining them, they function as a torque wrench. 1 This combination is compatible with the 1 and can be used for rotating work of large and small bolts, nuts, etc. in various combinations, making it versatile. 1. On the other hand, in the internal mechanism of the ratchet type link 2, the drive plate 12 and the piston rod 5
By adopting a structure in which the component parts are in close contact with each other (in addition to having a space within the driving range of the As a result, the strength of the entire torque wrench can be significantly increased.

An embodiment of the present invention will be described below with reference to one drawing.
First, in Fig. 1, the cylinder part l that generates push, push, and pull forces by the forward and backward movement of the piston is attached to the connecting part 4 of the latch type link part 2. 1) or from the side of the link connection part 4 using a set screw (Fig. 2). This connecting part 4 not only connects the cylinders, but also the insertion part of one cylinder has an irregular shape so that the cylinder can resist reaction force after one connection.

When the piston rod 5 moves forward, the rod end 6 is guided by the grooves 9X10 of the left and right side plates 7.8 and moves forward by one piston stroke. At this time) the drive plate 12 connected to the rod end 6 by the pin 11 rotates while being guided by the elongated hole 13.
A presser foot 14 is incorporated in the drive plate 12 and transmits the rotational force of the sill to a ratchet type rotating shaft 15 (FIG. 1) X or a hexagonal ratchet 16 (FIG. 2). When the piston rod 5 moves back, the 10-end end 6 also falls into the groove 9.1.
0 and retreats, but at this time, the press-clamp opening slides along the outer periphery of the ratchet teeth 18 together with the drive plate 12 against the press-clamp spring 17, and is accommodated in the rear ratchet teeth. An impact socket is attached to the rotating shaft 15, and in the case of a hexagonal ratchet, it is inserted directly into a bolt or nut to perform rotation work. The reaction plate 3 has an insertion hole 20 for one ball 19 and a spring 21\cap 22 to complete the one-way ball lock mechanism. The reaction plate 3 is configured such that when a rotational force is applied to the cylinder, the ball 19 is accommodated in the ball groove 23 of the cylinder in that direction, and at the same time the ball 19 receives the rotational force in the direction of the ceiling of the ball insertion hole 20. Do not rotate until crushed. However, when the reaction plate is rotated in the opposite direction, the nine balls resist the spring 21 and the insertion hole 20
The reaction plate can be easily rotated.

If you want to receive a reaction force in the reverse direction, you can create exactly the same phenomenon by inserting one reaction force plate into the cylinder from the opposite direction. To pull out the reaction plate 1
Loosen the positioning bolt 24, insert the push-up rod 26 through the ball push-up hole 25, and push the ball 19 up above the insertion hole 20.

In order to insert and fix the cylinder part 1 into the connecting part 4 of the ratchet link 2, it is possible to use a ball lock mechanism as shown in FIG. 1 or a screw fastening method as shown in FIG.
The ball lock system has the advantage of preventing the cylinder from coming off when the cylinder is under load (as is the case with the reaction plate ball lock mechanism) and that the cylinder can be attached and detached with a single touch.

As is clear from the above description, the present invention (compared to the conventional hydraulic torque wrench) uses a two-piece system in which the cylinder is inserted into the ratchet link that forms the anti-torque body, allowing one and the same cylinder to be combined with ratchet links of different specifications. They can be used in combination, and conversely, the maximum torque can be changed by inserting cylinders with different load capacities into the nine-ratchet link. In other words, the present invention aims to create torque wrenches with different specifications and capacities on-site by combining ratchet links and cylinders, and to economically and widely perform the rotation work of many different bolts and nuts. is

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. 1 Figure 1 is a detailed explanation of the invention 1 Figure 2 is a side view of the cylinder screwed part 1 Figure 3 is a rear view of the wrench 1 Figure 4 Figure 5 shows that. 1... Cylinder part 2... Ratchet link
3...-Reaction plate 4... Cylinder connection part 5
・°・Piston rod 6°°. Rod ends ? X8・°・Side plate 9) 10
...Rod end guide groove 1 work...Rod end pin 12...Drive plate 13...-
Long hole for pin 14...Pushing 15°...Ratchet type rotating shaft 16°°/Hexagonal ratchet 17...
・Press spring 18...Ratchet teeth
19... Ball 20... Φ ball insertion hole 21
・°°Spring 22...Ball substitute cap
23°° Cylinder ball groove 24... Reaction plate positioning bolt 25... Ball push-up hole 26...
・The shape of the reaction plate is shown for each ball push-up rod.

Claims (1)

[Claims] 1. A cylinder part 1, a rotation mechanism, and a ratchet type link 2 having a connection mechanism with the cylinder in order to transmit the pushing and pulling forces generated by the piston of the cylinder to the rotation mechanism. Hydraulic torque wrench 2 and ratchet type link 2 are designed to be compatible with cylinders, and by replacing the ratchet type link, it is possible to rotate bolts and nuts of different shapes. Hydraulic torque wrench 3 and cylinder. A hydraulic torque wrench which has a one-way ratchet type reaction force mechanism using a ball in part 1 and has a reaction force plate 3 across the cylinder for receiving the reaction force generated in the cylinder on the opposite reaction force surface.