JP2595850Y2 - Impact tool - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of sealing a lubricant in a mechanical chamber for hitting, rotating and hitting a tool, such as a hitting tool.

[0002]

2. Description of the Related Art A conventional impact tool is formed of a single mechanical part room without dividing the mechanical part room.

[0003]

[Problem to be solved by the invention] In the conventional impact tool,
Due to the one-way continuous work (ceiling, side wall, lower floor work, etc.), the lubricant is deviated in the direction of gravity, the lubrication of the striking parts such as the reciprocating piston, striker, etc., and the conversion to convert the rotation into reciprocating motion There has been a problem in that a portion that always requires lubricant such as a mechanism portion runs out of lubrication, heat is generated in the sliding portion, and locking occurs due to galling, and the life of the impact tool is short. The object of the present invention is that even when the impact tool performs a continuous operation in one direction or the like, the lubricant does not lean on the inner wall of the housing in the direction of gravity, and the sliding portion of the impact portion, the conversion mechanism portion, the transmission portion with a small amount of lubricant. Etc. is to always supply lubricant.

[0004]

The above object is achieved by providing an inner wall for dividing the mechanism chamber into two or more sections. The inner wall is achieved by not contacting the sliding / rotating member in the mechanism section and reducing the gap between the sliding / rotating member. Further, it is preferable that the housing and the inner wall be integrated with each other or incorporated together with the built-in component as a separate part.

[0005]

When the impact tool constructed as described above is continuously operated in one direction or the like, the inner wall provided in the mechanism section chamber blocks the bias of the lubricant in the gravitational direction. It acts on the inner wall to serve as a guide for supplying lubricant to a member that performs rotation or sliding movement in the mechanism. In the case of a split housing structure, the inner wall can be divided by the inner wall provided integrally with the housing, and in the case of a cylindrical housing structure, the wall of another part can be separated by the inner wall. It becomes possible by incorporating it into

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to one embodiment of FIGS. 1 and 2. Rotational movement of a drive shaft 2 is transmitted to an intermediate shaft 4 via a first gear 3. FIG. Further, the intermediate shaft 4
The cylinder 6 is rotated through a second gear 5 provided on the cylinder 6, and the rotation is constantly transmitted to the tip tool 7. On the intermediate shaft 4, an oscillating body 8 rotatably fitted is provided.
And a clutch 9, which is movable in the axial direction and is engaged with a spline provided on the intermediate shaft 4 and a spline provided on the inner diameter portion of the clutch 9.
Cylinder 6 is driven by spring 17 to thrust plate 1
0, it is constantly urged forward via a thrust bearing 11, and is disposed so as to be movable in the axial direction. The thrust plate 10 comes into contact with the groove 9a of the clutch 9, and at the time of forward movement, the clutch 9 also advances at the same time. A flange 6 a concentric with the cylinder 6 is formed on the cylinder 6 so as to overlap on the side surface of the clutch 9. Clutch 9
Retracting and a clutch pawl provided at one end of the oscillator 8
The configuration is such that the unevenness of the clutch pawl provided at the opposite end of the clutch 9 engages, and the intermediate shaft 4 and the rocking body 8 are engaged .

In this structure, when the tip tool 7 is pressed against the workpiece as shown in FIG. 1, the cylinder 6 moves rearward against the spring 17. At the same time, it comes into contact with the cylinder 6 and retreats the clutch 9. As a result, the clutch 9
Engages with the rocking body 8, the driving force of the intermediate shaft 4 is transmitted to the rocking body 8, and reciprocates via the piston 12. Further, the striker 15 follows the air spring of the air chamber 14 provided in the piston 13, and strikes the tip tool 7 via the intermediate member 16. A mechanical portion is collectively referred to as a hitting portion, a converting portion for converting rotation into reciprocating motion, and a rotation transmitting portion, with a tightening screw 22 substantially at the center of the split housing 1, and a lubricant seal is provided on this abutting surface. A good rubber seal 23 is provided. In the housing 1, an inner cover 20 for supporting a bearing is provided to improve rigidity. Inside the housing 1, an inner wall 1 a for dividing the inside of the mechanism section chamber 18 with a small clearance 21 that does not come into contact with the rotating / sliding member is provided between the claw of the clutch 9 and the claw of the oscillator 8.
It is provided integrally with the housing so as to surround the periphery near the joint . Thus, even when the lubricant is biased due to an operation of holding the main body in one direction such as a continuous upward operation, the lubricant can always easily come into contact with the rotating member and the sliding member. Further, in the present embodiment, the structure is such that the lubricant passes through the clearance 21 between the clutch 9 as the rotating member and the inner wall 1a, and the supply of the lubricant to the clutch portion where heat and wear are likely to occur is facilitated. The service life of the sliding portion and the rotating portion, which are liable to be worn, can be improved, and the amount of the lubricant to be filled can be reduced, so that significant effects such as cost reduction can be obtained.

[0008]

According to the present invention, an inner wall 1a for dividing the inside of the mechanism room 18 with a small clearance 21 which does not come into contact with the rotating / sliding member is provided at the center of the housing 1 inside the housing 1. Since the lubrication is integrally provided, even if the lubricant is biased due to the operation of holding the main body in one direction, such as continuous upward operation, the lubricant can always easily come into contact with the rotating member and the sliding member. Furthermore, since the supply of lubricant has become easier, it is possible to improve the life of the rotating and sliding parts, which are likely to generate heat and wear, and to reduce the amount of lubricant to be filled. Can be

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

1 is a housing, 1a is an inner wall, 2 is a drive shaft, 3 is a first gear, 4 is an intermediate shaft, 7 is a tip tool, 8 is a rocking body, 9
Is a clutch, 12 is a piston pin, 13 is a piston, 1
4 is an air chamber, 15 is a striker, 18 is a mechanism room, and 21 is a clearance.

Claims (3)

(57) [Scope of request for utility model registration] A motor having a drive shaft and a rotation of the motor
An intermediate shaft for transmitting rolling, and on the intermediate shaft,
Claw that is integrally rotatable and movable in the axial direction and has a claw at one end
A latch and axial movement of the clutch
A claw that can be engaged with the claw, and that is
Rotatably arranged and rotated by engagement with the clutch.
And an oscillator that converts the reciprocating motion into a reciprocating motion.
Built in the jing, and lubricated in the housing
In a striking tool, the claws of the clutch and the claws of the oscillator are provided.
With a predetermined clearance around the vicinity of the meshing point with
A striking tool characterized by providing an inner wall to surround . 2. The interior wall is integral with the housing.
The impact tool according to claim 1, wherein: 3. The housing according to claim 2, wherein the inner wall is a separate part from the housing.
The impact tool according to claim 1, wherein the impact tool is used.