JPS60150968A - Hydraulic type torque wrench - 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 is a combination of a conventional cylinder and a ratchet.
:Eliminating the various drawbacks of the ratchet type hydraulic torque wrench 1
It was devised for the purpose of rotating bolts and nands in the most efficient manner.

To point out a problem with the conventional method, the hydraulic torque wrench of the Pukopuro type uses a cylinder, and one piston rod performs work (rotational motion) during the push stroke and remains idle during the return stroke, so it is intermittent. Only rotating work is possible. Originally, the drawback of hydraulic systems is that while they can provide a large amount of force, the working speed is slower than other methods, and intermittent work causes a further reduction in speed. The prototype wrench has a structure in which a part of the cylinder that performs one-push operation and a drive unit that converts it to rotation work are connected by the main body housing, and the size is 1 and the number of components is 1.
It is difficult to reduce weight to a sufficient extent.

The present invention aims to change the concept by not using a conventional cylinder, but instead employs a system in which high-pressure hydraulic oil is directly injected into the working parts of the main body.

The apparatus of the present invention will be explained below based on the drawings of the embodiments.

In Fig. 1, reference numeral 1 denotes a main body housing portion that houses all functions, and an impeller 2, which corresponds to a conventional ratchet, is built into this housing portion. Although it is equivalent to a ratchet, the present invention differs greatly from the prototype in that torque is generated by oil pressure instead of by the propelling pawl.

In the present invention, since there is no return stroke, continuous rotational movement is possible, and the rotational speed is doubled in inverse proportion to the load.

3 is a high pressure oil inlet 14 which is its return port.

The oil injected from 3 causes the impeller to rotate continuously, and then returns to the hydraulic pump from 4.

Accordingly, the present invention does not require a valve to change the direction of the oil. A rotating shaft 5 is inserted into the impeller 2, and bolts and nuts are rotated by a socket inserted into the tip of the rotating shaft. Since the rotary shaft 5 performs both tightening and loosening operations, it is necessary to change the direction of the shaft or replace it, and in the case of the spline shaft 5 of the first embodiment, a shaft upper cap 6 is used to prevent it from falling off after replacement. The impeller insertion part of the rotating shaft takes a shape such as square to hexagonal\-biagonal A spline depending on the size of the output torque, but the 1 socket insertion side is a normal commercially available shape as shown in Figure 3. It has a rectangular shape so that sockets can be used. In the case of the present invention as well, a reaction force plate mounting hole 7 is provided (because it is necessary to take a reaction force in the direction of rotation). 8) 9slO is a high-pressure oil leak prevention sole, and 11 is a screw-in lid that seals the main body housing part.

As described above, the basic mechanism of the present invention is extremely simple, and together with the robust product structure, this is a major feature of the present invention.

As is evident from the above embodiments, the present invention eliminates the drawbacks of previous prototype hydraulic wrenches. That is, it is possible to increase the speed of rotation work by one continuous rotation, and to double the speed under small loads, which has been a problem up until now.

Furthermore, the product can be made compact and lightweight, which greatly contributes to work efficiency. This can also have a great effect when a hydraulic torque wrench is used on a production line.

[Brief explanation of drawings]

FIG. 1 is an overall structural diagram showing an embodiment of the device of the present invention, and FIG.
The figure is a similar side view. Figure 3 shows the axis of rotation. In the figure, 1 is the main body), the housing 12 is the impeller, 3 is the high pressure oil input/input 4 is the high pressure oil return port 15, the rotating shaft 16 is the rotating shaft stopper cap 17 is the reaction plate insertion port 819%, 10 is the The sole for oil leakage \11 is the upper lid.

Claims (1)

[Claims] A torque wrench that presses other liquids (high-pressure oil) into a sealed container 1, rotates the impeller 2 inside the container by the pressure of the liquid, and tightens or loosens bolts and nuts using the rotational force of 1 + 1115 rotations. .