JP2564762Y2 - Reciprocating saw lubricator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating device for a reciprocating saw in which a plunger guided on a side surface in a gear case makes an elliptical motion at a tip.

[0002]

2. Description of the Related Art In a conventional reciprocating saw having a plunger whose side surface is guided in a gear case, a space for sufficiently inserting grease into a gap between the plunger and the plunger case is not provided.

[0003]

[Problem to be Solved by the Invention] Since not only a vertical load but also a considerable load acts on the inner side surface of the plunger and the plunger case for guiding the plunger, heat is generated by friction on the guide surface. Grease is likely to evaporate due to such factors. The plunger and the plunger cable
Since scan of the gap side surface for guiding the plunger is narrow, because the grease was once lost when very difficult to insert a new grease, the heat generated by the grease out, proceeds such mechanical loss, even of a failure of the body Was causing it. An object of the present invention is to prevent the guide surface between the plunger and the plunger case from running out of grease, and to improve the life of the main body.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a grease chamber at an upper portion and a lower portion of a plunger in a gear case, and at least one groove communicating with the grease chamber on a guide surface of the plunger case for guiding the plunger. This is achieved by providing

[0005]

With the grooves arranged as described above, grease always penetrates into the plunger and the guide surface, thereby preventing heat generation and mechanical loss.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. There is a motor 2 in a housing 1 and a housing 1
A bearing 7 for supporting a spindle 6 into which a bevel gear 5 meshing with a pinion 4 of the motor 2 is press-fitted is held in a gear case 3 attached to the motor 2. The crank pin 8 is press-fitted at a position away from the center of the bevel gear 5.
A slope 9 is formed on a part of the upper surface of the bevel gear 5, and a thrust bearing 10 is mounted on the slope 9.
On the other hand, a plunger case 12 for guiding the reciprocating movement of the plunger 11 is provided on the upper side of the bevel gear 5, one end of which is supported by the gear case 3 via a pin 13, and the other end of which is mounted on the thrust bearing 10. I have. In the plunger case 12, the plunger 11 is guided by a bearing 14 in the up-down direction and a side surface is guided by an inner wall of the plunger case 12 so that the plunger 11 can slide in the front-rear direction. A groove 15 is provided on the inner wall of the plunger case 12 so as to communicate with a grease chamber 23 formed by sealing a space above and below the plunger 11. Plunger 11 is gear case 3
Spring 16 and steel ball 1 incorporated in the upper part
7 always presses against the bevel gear 5 side. A slider frame 18 is attached to the middle lower side of the plunger 11, and a sleeve 19 inserted into the crank pin 8 is provided.
Are engaged in the slider frame 18.

A blade 21 is fixed to the tip of the plunger 11 via a blade holder 20 with bolts 22. When the motor 2 is started, the pinion 4 rotates the bevel gear 5. The rotation of the bevel gear 5 is performed by a cross slider mechanism composed of a crank pin 8 and a slider frame 18, and the bevel gear 5 having the inclined surface 9 rotates while the plunger 11 moves back and forth, and through the thrust bearing 10. The contacting plunger case 12 swings about the support pin 13 to give the plunger 11 a vertical movement,
The tip of the blade 21 describes an elliptical locus.

At the time of cutting, a force is applied to the plunger 11 in the vertical and lateral directions, and a frictional force acts on the inner wall of the plunger case 12, but the groove 15 is provided in communication with the grease chamber 23, and the plunger case 12 is Since it swings up and down, grease is always supplied to the friction surface,
Prevent heat generation, mechanical loss, etc.

[0009]

According to the present invention, at least one groove is provided in the plunger case for guiding the side surface of the plunger so as to communicate with the grease chambers arranged above and below the plunger. Can be supplied, heat generation and mechanical loss can be prevented, and the life of the main body can be extended.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a side view of the plunger case of the present invention.

FIG. 3 is a bottom view of the plunger case of the present invention.

[Explanation of symbols]

11 is a plunger, 12 is a plunger case, 15 is a groove, 21 is a blade, and 23 is a grease chamber.

Claims (1)

(57) [Scope of request for utility model registration] A blade is attached to a tip, and a length of the blade is set.
A plunger that will be reciprocated along the longitudinal direction, holding the plunger for reciprocal movement, and plan <br/> Ja case of performing up and down swinging movement, and a grease chamber provided in the upper and lower portion of the plunger A reciprocating saw for cutting the material to be cut by causing the blade to perform an elliptical movement , wherein at least one groove communicating with the grease chamber is provided on an inner wall of a portion that guides the reciprocating movement of the plunger of the plunger case and swings up and down. A reciprocating saw lubrication device, characterized in that it is provided.