JPH09109041A - Socket wrench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the attitude of a socket part of a universal socket wrench so as to be smoothly fitted to a bolt head or the like. SOLUTION: Torque is transmitted to a socket part 2, fitted to a head of a bolt or a nut, through a shank part 3, and the socket part 2 and the shank part 3 are jointed at a connection part 5 by a universal joint. In such a universal socket wrench, a coil spring 6 is interposed between the shank part 3 and the socket part 2 so as to energize the socket part 2 to the neutral attitude side to prevent the attitude of the socket part 2 from being unstable. A plurality of flat springs 15,... can be used instead of the coil spring 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a universal socket wrench used for fastening bolts, nuts and the like.

[0002]

2. Description of the Related Art Conventionally, a universal socket wrench 51 as shown in FIG. 7, for example, is known as a fastening tool for fastening a bolt or the like at an angle from the axis.
In this universal socket wrench 51, a socket portion 52 into which a head such as a bolt is fitted, and a shaft portion 53 that transmits torque to the socket portion 52 are connected by a joint portion 54 by a universal joint. The socket portion 52 can be tilted at an arbitrary angle with respect to the axial direction.

[0003]

However, such a universal socket wrench 51 has a socket portion 52.
Since it tilts with an extremely light force, especially when the shaft portion 53 is long, even if trying to fit the socket portion 52 at the tip to the head portion of a bolt or the like, the posture is unstable and the workability is poor, resulting in poor workability. There was a problem. Further, if the tightening work is started in a state where the socket portion 52 is not completely fitted, the socket portion 52 may come off and damage other portions,
In addition, since the swinging angle of the socket portion 52 is large, there is a problem that the socket portion 52 is likely to come off when confirming the torque. Therefore, there has been a demand for a universal socket wrench that can be smoothly fitted to bolts and the like and that the fitting is not easily removed.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, according to the present invention, a socket portion fitted to a head of a bolt or the like and a shaft portion for transmitting torque to the socket portion are connected by a universal joint. In the universal socket wrench that is used, an elastic member that returns the unfitted socket portion to the neutral posture is interposed between the shaft portion and the socket portion.

At this time, the elastic member is, for example, a coil spring, a leaf spring, or the like. By biasing the socket portion toward the neutral posture side by this elastic member, the posture of the socket portion is stabilized, and the head portion such as a bolt is fixed. Fits smoothly.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a perspective view of a socket wrench of the present invention, FIG. 2 is an explanatory view showing an example of application of the socket wrench, and FIG. 3 is a diagram showing various structural examples of a spring receiving portion when an elastic member is a coil spring. 4 and 5 show an example of the configuration using a leaf spring as the elastic member.

The socket wrench 1 of the present invention is shown in FIG.
1. As shown in FIG. 1, a socket portion 2 that is configured as an attachment component of an automatic tightening machine H such as a bolt and has a hexagonal fitting recess that can be fitted to the head of the bolt and the like. A shaft portion 3 for transmitting a rotational torque to the socket portion 2 is provided. And this socket part 2
The shaft portion 3 and the shaft portion 3 are connected to a universal joint by a coupling portion 5, and a coil spring 6 as an elastic member is contracted between the socket portion 2 and the shaft portion 3.

The biasing force of the spring 6 does not become a great resistance force when the socket portion 2 tilts from the axial direction of the shaft portion 3, and returns to a neutral posture when the socket portion 2 is in a free state. It has a relatively light power.

The spring receiver for receiving the coil spring 6 has a separate type set collar 7 fixed to a predetermined portion of the shaft portion 3 with a screw 8 on the side of the shaft portion 3, and on the side of the socket portion 2 on the side of the socket portion 2. The plate 9 is disposed in close contact with the rear end surface of the socket portion 2, and the coil spring 6 is sandwiched between the set collar 7 and the plate 9. At this time, the set collar 7 is detachable,
For example, if the attachment is damaged, it is possible to attach it to a new attachment, and
Since the mounting position with respect to the shaft portion 3 can be moved back and forth and adjusted, the strength of the coil spring 6 can be adjusted.

Incidentally, the set collar 7 is shown in FIG.
The rear side of the washer 10 may be fixed with a circlip 11 as shown in FIG.
As shown in (B), the collar 1 with the collar fitted on the shaft portion 3
2 may be fixed by a round pin 13.

Further, the plate 9 on the socket portion 2 side
Has a large diameter so as to receive the tension of the spring 6 over a wide range. In the embodiment, a urethane plate which is a separate body from the socket portion 2 is used. However, the rear end of the socket portion 2 has a large diameter and is integrated with the socket portion 2. You may make it shape | mold.

The operation of the socket wrench 1 as described above will be described with reference to FIG. For example, when tightening the converter on the engine, the socket wrench 1 of the present invention is used for tightening the converter self-lock nut N. At this time, the socket 2 is made to approach from the direction shifted from the tightening axis, but if a part of the opening of the fitting recess at the tip of the socket 2 is engaged with the self-locking nut N and light force is applied, the socket 2 No. 2 does not sway and is bent so as to coincide with the tightening axis direction, and can be fitted smoothly.

The fitting state does not come off if a slight pressing force is applied to the socket portion 2, and the fitting state can be surely maintained even when tightening and confirming the tightening torque. By the way, when the attitude of the socket 2 is stabilized by the coil spring 6 as described above, the time required to fit the self-lock nut in one place was about 1 second in the conventional case, but it is about half the value of 0. It was shortened to about 5 seconds.

By the way, a leaf spring may be used in place of the coil spring 6 as described above. Therefore, an example of using this leaf spring will be described with reference to FIGS. 4 and 5. In FIG. 4, four leaf springs 15 are circumferentially extended from the rear end of the socket portion 2 toward the rear, and the tip end portions of these leaf springs 15 are pressed against the outer circumference of the shaft portion 3. It is abutted in the state.

Also in this case, the posture of the socket portion 2 is biased to the neutral state, and returns to the neutral posture when it is out of the fitted state. Further, the elastic force of the leaf springs 15 is not so large as to resist the tilting of the socket portion 2, and further, the elastic force can be surely returned to the neutral posture.

Further, in FIG. 5, the leaf spring retaining ring 1 is attached to the shaft portion 3.
6 is fixed and a plurality of leaf springs 15, ... Are bulged forward from the leaf spring retaining ring 16, while a hollow recess 2a is formed on the rear surface of the socket 2, and the inner peripheral surface of the hollow recess 2a has the above-mentioned structure. This is a configuration example in which the tips of the leaf springs 15 are brought into contact with each other in a pressure contact state. Also in this case, the attitude of the socket portion 2 is maintained in the neutral state by the elastic force of the leaf springs 15, ....

Also in the above-mentioned FIGS. 4 and 5, the posture of the socket portion 2 is stable without swaying, and when the socket portion 2 is fitted from a direction deviated from the tightening shaft, the socket portion 2 is fitted smoothly. It is possible to ensure that the fitting state is maintained. Of course, the number of leaf springs 15, ... Is arbitrary.

[0018]

As described above, in the socket wrench of the present invention, the elastic member is interposed between the socket portion and the shaft portion, and the socket portion is urged so that the posture of the socket portion is in the neutral state. The fitting is smooth, and it is possible to suppress problems such as disengagement during tightening work and checking tightening torque.

[Brief description of the drawings]

FIG. 1 is a perspective view of a socket wrench according to the present invention.

FIG. 2 is an explanatory view showing an example of application of the socket wrench of the present invention.

3A and 3B are views showing various structural examples of a spring receiving portion when an elastic member is a coil spring, in which FIG. 3A is a washer fixed with a circlip, and FIG.

FIG. 4 shows a configuration example using a leaf spring as an elastic member, in which a leaf spring is attached to a socket portion.

FIG. 5 shows another configuration example using a leaf spring as an elastic member, in which a leaf spring is attached to a retaining ring.

FIG. 6 is an operation diagram of the socket wrench of the present invention.

FIG. 7 Conventional view

[Explanation of symbols]

1 ... Socket wrench, 2 ... Socket part, 3 ... Shaft part, 5 ...
Universal joint, 6 ... Coil spring, 15 ... Leaf spring.

Claims (1)

[Claims] 1. A universal socket wrench in which a socket portion that fits into the head of a bolt or the like and a shaft portion that transmits torque to the socket portion are connected by a universal joint. A socket wrench characterized in that an elastic member for returning the non-fitted socket portion to a neutral posture is interposed therebetween.