JPH04128183U - impact tool - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to prevent temperature rise due to friction between the thrust plate and the clutch via the spring. [Structure] A sleeve 16 is provided at the end of the clutch, and the clutch-side end surface of this sleeve 16 holds the spring 4 attached to the clutch 2, and the thrust plate 3, the spring 4 attached to the clutch 2, and the thrust washer 8
It is characterized by providing a gap in the thrust direction between the two. [Effect] The thrust plate will no longer receive thrust loads from the clutch other than when the clutch is turned on or off.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a striking tool.

0002

[Conventional technology]

A conventional example of the positional relationship between the clutch and the thrust plate is shown in Figure 3. As shown in FIG. The thrust press is always activated, regardless of the interlocking of clutch 2 due to the axial movement of the cylinder. The structure is such that the clutch 3 and the spring 4 attached to the clutch 2 are in complete contact. It was. In the figure, 5 is an intermediate shaft, 6 is a ball, 7 is a long groove, and 8 is a thrust washer. It's Sha.

0003

[Problem that the idea aims to solve]

In the conventional structure, a thrust plate and a clutch via a spring are always connected. There was a problem that frictional heat was generated due to the rotation of the intermediate shaft.

0004 This invention was devised in view of the above points, and is based on a thrust plate and a spring. A striking tool that makes it possible to prevent temperature rise due to friction with the clutch via the The purpose is to provide the following.

[0005]

[Means to solve the problem]

The above purpose is to provide a sleeve at the end of the clutch, and the end surface of this sleeve on the clutch side Holds the spring attached to the clutch and attaches it to the thrust plate and clutch. Provide a gap in the thrust direction between the installed spring and thrust washer. This is achieved by:

[0006]

[Effect]

Since the above means is provided, the thrust plate is used for clutch operations other than clutch on/off. It will not receive the thrust load from.

[0007]

【Example】

Next, the present invention will be specifically explained using examples.

[0008] [Example 1] An embodiment of the present invention is shown in FIGS. 1 and 2. FIG. The same parts as before are given the same reference numerals, so the explanation will be omitted. Provided within the housing 9, the drive shaft 1 An intermediate shaft 5 to which the rotation of 0 is transmitted via the first gear 11, and a A rocking body 1 that rotatably plays with each other and drives a piston 12 reciprocatingly. The cylinder 14 is movable in the direction and is biased forward by the spring 13. A clutch 2 that transmits the rotational force of the intermediate shaft 5 to the body 1 moves the tip tool 15 in the axial direction. It is operated by the movement of the thrust plate 3 in conjunction with the movement of the cylinder 14. A striking tool with a spring 4 and a thrust washer 8 attached to the latch 2 In this embodiment, a sleeve 16 is provided at the end of the clutch, and the sleeve 16 is The clutch side end face holds the spring 4 attached to the clutch 2, and the thrust Between the plate 3 and the spring 4 and thrust washer 8 attached to the clutch 2 A gap was provided in the thrust direction. By doing this, the thrust plate 3 so as not to receive thrust load from clutch 2 other than when clutch 2 is turned on or off. The temperature due to the friction between the thrust plate 3 and the clutch 2 via the spring 4 is It is possible to obtain a striking tool that is capable of preventing an increase in power.

[0009] That is, the rotational motion of the drive shaft 10 is transmitted to the intermediate shaft 5 via the first gear 11. be done. Furthermore, the intermediate shaft 5 passes through a second gear 17 provided on the cylinder 14. Rotation is constantly transmitted to the tip tool 15. On the intermediate shaft 5 there is a rotatable rocker. A moving body 1 is disposed, and a clutch 2 biased by a spring 4 is movable in the axial direction. The intermediate shaft 5 and the rocking body 1 are arranged so as to be engageable with each other by means of a ball 6. cylinder 14 is connected to the thrust plate 3 via the thrust bearing 18 by the spring 13. It is always biased forward and is arranged to be movable in the axial direction. thrust pre The seat 3 is in contact with the housing 9 when retracting. Also, on thrust plate 3 contacts clutch 2, and when moving forward, clutch 2 also moves forward at the same time. Also, when reversing The spring 4 installed between the clutch 2 and the thrust plate 3 is thrust Through the washer 8 or by direct compression, the clutch 2 is moved back and the intermediate shaft 5 and the rocking body are compressed. 1 with ball 6. With this structure, the tip tool 15 is rotated while the drive shaft 10 is rotated. When pressed against the workpiece 19, the cylinder 14 compresses the spring 13 and moves backward. move. At the same time, the thrust plate 3 retreats and the spring 4 is attached to the thrust washer. 8 or through direct compression to the clutch 2. This drag is the ball 6 This produces an effect of pushing the intermediate shaft 5 in the axial direction of the intermediate shaft 5. Disposed between the intermediate shaft 5 and the oscillator 1 When the placed ball 6 engages with the long groove 7 of the intermediate shaft 5, the clutch 2 moves backward, and the intermediate shaft 5 The driving force is transmitted to the oscillating body 1, and the air chamber 20 in the air chamber 20 provided in the piston 12 The striking element 21 is followed by the needle and strikes the tip tool 15 via the intermediate element 22. When the tip tool 15 is released from the workpiece 19, the cylinder 14 is moved forward by the spring 13. move towards In conjunction with this, the thrust plate 3 moves forward, and the clutch 2 moves forward. Move to. The ball 6 is pushed out in the diametrical direction by the rotational force of the intermediate shaft 5, and swings with the intermediate shaft 5. The engagement with the body 1 is released and the blow stops. In Fig. 1, 23 is the piston pin. Ru.

0010 With the above operation, the cylinder 14 is press-fitted into the clutch 2 during forward movement or backward movement. At the thrust direction end face of the sleeve 16 on the clutch 2 side, which is attached with By receiving the thrust plate 4 through the thrust washer 8 or directly, the thrust plate To prevent temperature rise due to friction between the thrust washer 8 and the spring 4. Can be done.

[0011] In this way, according to this embodiment, the thrust plate is provided with a clamp via a spring. The tip moves in conjunction with the axial movement of the cylinder, making contact only momentarily until it moves to the specified position. The main body is in a no-load state (clutch is disengaged) or the clutch is fully functional. When the clutch is engaged (the clutch is engaged), the gap is The gap between the thrust plate and the clutch via the spring prevents friction between the thrust plate and the spring. It is possible to prevent the temperature from rising.

0012

[Effect of the idea]

As mentioned above, the present invention utilizes a thrust plate and a clutch via a spring. Temperature rise due to friction is now prevented, and the thrust plate and spring A striking tool that makes it possible to prevent temperature rise due to friction with the clutch via the can be obtained.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of an embodiment of the impact tool of the present invention.

FIG. 2 is a longitudinal side view showing the positional relationship between a clutch and a thrust plate in the same embodiment.

FIG. 3 is a longitudinal side view showing the positional relationship between a clutch and a thrust plate of a conventional impact tool.

[Explanation of symbols]

1... Rocking body, 2... Clutch, 3... Thrust plate, 4
...Spring, 5...Intermediate shaft, 8...Thrust washer, 9
...housing, 10...drive shaft, 11...first gear,
12...Piston, 13...Spring, 14...Cylinder,
15... Tip tool, 16... Sleeve.

Claims (1)

[Scope of utility model registration request] Claim 1: An intermediate shaft provided in a housing, to which rotation of a drive shaft is transmitted via a first gear, and a rocking body rotatably engaged with the intermediate shaft to reciprocate a piston. , a cylinder which is freely movable in the axial direction in a limited manner and is biased forward by a spring, and a clutch which transmits the rotational force of the intermediate shaft to the oscillating body, are configured to control the axial movement of the tip tool and the movement of the cylinder. The impact tool is actuated by the movement of an interlocking thrust plate, and the clutch is equipped with a spring and a thrust washer. A sleeve is provided at the end of the clutch, and the spring is attached to the clutch at the clutch-side end surface of the sleeve. 1. A striking tool characterized in that a gap is provided in a thrust direction between the thrust plate and a spring and a thrust washer attached to the clutch.