JP3146665U6 - Percussion drill impact switching means - Google Patents

Abstract

An impact switching means for a percussion drill capable of switching between an impact button and a torsional force button whenever necessary.
A lower ring includes a lower ring, a lock ring, a housing, a sliding block, an impact button, positioning means, and a center of gravity positioning means, and the lower ring is an output main shaft of a percussion drill. The lock ring is provided on the lower ring, the housing is provided with the upper end in contact with the lock ring, the sliding block is provided on the housing, and the impact button is provided on the sliding block. Provided, the rear end is provided extending outside the front cover of the percussion drill, the positioning means is provided in accordance with the sliding block, the housing abuts on the lock ring, and the center of gravity positioning means is provided in accordance with the positioning means. And the positioning means is provided for releasing the restriction of the position of the sliding block.
[Selection] Figure 1

Description

  The present invention relates to impact switching means, and more particularly to impact switching means for electric tools such as percussion drills.

  Currently, percussion drills sold in the market usually have three types of working models. The three types of work models are divided into electric screw tightening, electric drill, and percussion drill.

  The three types of work models correspond to the three actions, and the torsional force cup is rotated to switch the output of the torsional force and various actions.

  The above-described impact drill includes a front cover, a torsional force cup, an output main shaft, an upper wheel connected to the output main shaft, a lower wheel, an internal gear sleeve, a gear set, and a motor. Comprising.

The torsional force cup is connected to a screw groove at the upper end of the front cover via an adjusting mother screw. The lower wheel and the upper wheel mesh with each other, and a compression spring is provided between the pad provided below the adjustment mother screw and the pad and the adjustment mother screw.

A ball is provided between the internal gear sleeve and the pad, and when the torsional force cup rotates, the torsional force cup and adjusting mother screw press the compression spring, pad, ball, etc. below it, and the torsional force is adjusted. Is output.

When the impact button is switched, an axial impact gap exists between the two wheels above the upper wheel. The main shaft achieves the purpose of giving an impact by outputting the reciprocating motion in the axial direction via the mutual relationship between the upper and lower wheels.

In the above-described percussion drill, the impact button is usually provided at the position of the maximum torsion force button of the torsion force cup.

Also, considering the safety of percussion drills, any product sold in the market must be switched to the minimum twisting force button. When using a percussion drill, switch between minimum torsional force button and impact button.

However, since the rotation angle to be switched every time is relatively large and switching must be performed after the rotation of the motor is stopped, it is inconvenient, safety is low, and work efficiency is low.

An object of the present invention is to provide an impact switching means for a percussion drill in which adjustment of an impact button and a twisting force button is provided independently of each other.

Therefore, the inventors of the present invention conducted extensive research in view of the drawbacks found in the prior art. As a result, the lower ring, the lock ring, the housing, the sliding block, the impact button, the positioning means, and the center of gravity. Positioning means,
The lower ring is provided in mesh with the upper ring of the output main shaft of the percussion drill,
The lock ring is provided on the lower wheel, and can restrict the operation of the lower wheel in the circumferential direction,
The housing is provided for the upper end to contact the lock ring and the lock ring to rise and connect to the lower ring,
The sliding block is provided in accordance with the housing, and when it moves back and forth, the housing is raised or lowered,
The impact button is provided in accordance with the sliding block, the rear end is provided to extend outside the front cover of the percussion drill,
The positioning means is provided in accordance with the sliding block, and serves to fix the position of the sliding block when the housing comes into contact with the lock ring,
The center-of-gravity positioning means is provided in accordance with the positioning means, and the positioning means serves to release the restriction on the position of the sliding block.

Hereinafter, this device will be specifically described.
The impact switching means of the percussion drill according to claim 1 comprises a lower ring, a lock ring, a housing, a sliding block, an impact button, a positioning means, and a center of gravity positioning means.
The lower ring is provided in mesh with the upper ring of the output main shaft of the percussion drill,
The lock ring is provided on the lower wheel, and can restrict the operation of the lower wheel in the circumferential direction,
The housing is provided for the upper end to contact the lock ring and the lock ring to rise and connect to the lower ring,
The sliding block is provided in accordance with the housing, and when it moves back and forth, the housing is raised or lowered,
The impact button is provided in accordance with the sliding block, the rear end is provided to extend outside the front cover of the percussion drill,
The positioning means is provided in accordance with the sliding block, and serves to fix the position of the sliding block when the housing comes into contact with the lock ring,
The center-of-gravity positioning means is provided in accordance with the positioning means, and the positioning means serves to release the restriction on the position of the sliding block.

In the impact switching means of the percussion drill according to claim 2, the lower ring in claim 1 is provided with a plurality of convex portions on the outer peripheral surface, and a plurality of grooves are formed on the inner side of the lock ring in accordance with the convex portions. Provided.

The impact switching means of the percussion drill according to claim 3 is characterized in that the sliding block in claim 1 is provided with an installation tank, the lower end of the housing is inserted into the installation tank, and the bottom of the housing is installed in the installation tank. A slope is provided in accordance with, and the lock ring rises when the housing slides on the slope.

The impact switching means of the percussion drill according to claim 4, wherein the positioning means in claims 1 to 3 includes a contact block and a compression spring, and a lower end of the compression spring contacts the contact block, When the housing of the sliding block rises, the contact block moves downward via the elastic force of the compression spring and contacts the sliding block, thereby fixing the position of the sliding block.

The impact switching means of the percussion drill according to claim 5 is characterized in that the gravity center positioning means according to claim 4 includes a gravity center positioning button, a sliding plate, and a gravity center positioning spring, and the rear end of the gravity center positioning button is a percussion. Extends to the outside of the front cover of the drill, the front end is connected to the sliding plate, one end of the barrel positioning spring is fixed, the other end abuts the sliding plate, and the sliding plate matches the wedge-shaped picture at the lower end of the contact block Provided to push the abutment block upward.

In the impact switching means of the percussion drill according to claim 6, the sliding plate according to claim 5 is provided with upper and lower grooves having openings on the outside of the rear end, and the rear end surface of the upper and lower grooves is contacted. It is provided in accordance with the wedge-shaped surface at the lower end of the contact block.

The impact switching means of the percussion drill according to claim 7 is such that the center of gravity positioning button of the center of gravity positioning means according to claim 5 is provided at a position adjacent to the impact button so as to be convenient for operation.

The impact switching means of the percussion drill according to claim 8 is characterized in that the impact switching means in claim 4 includes two shafts, and the shaft is provided between the pad in the percussion drill and the internal gear. A positioning part is provided at the center, and the impact button and the sliding block are each provided with a positioning tank in accordance with the positioning part.

The impact switching means of the percussion drill according to claim 9 is characterized in that the impact switching means according to claims 5 to 7 includes a shaft, and the shaft is provided between the pad in the percussion drill and the internal gear, A positioning portion is provided, and the impact button and the sliding block are each provided with a positioning tank in accordance with the positioning portion.

  Since the impact switching means of the percussion drill according to the present invention can switch between the impact button and the torsional force whenever necessary, it has the effect of being practical and highly safe and improving the work efficiency.

This device is an impact switching means for a percussion drill in which the adjustment of the impact button and the torsion force button is provided independently of each other, and includes a lower ring, a lock ring, a housing, a sliding block, an impact button, and positioning Means and a center of gravity positioning means,
The lower ring is provided in mesh with the upper ring of the output main shaft of the percussion drill,
The lock ring is provided on the lower wheel, and can restrict the operation of the lower wheel in the circumferential direction,
The housing is provided for the upper end to contact the lock ring and the lock ring to rise and connect to the lower ring,
The sliding block is provided in accordance with the housing, and when it moves back and forth, the housing is raised or lowered,
The impact button is provided in accordance with the sliding block, the rear end is provided to extend outside the front cover of the percussion drill,
The positioning means is provided in accordance with the sliding block, and serves to fix the position of the sliding block when the housing comes into contact with the lock ring,
The center-of-gravity positioning means is provided in accordance with the positioning means, and the positioning means serves to release the restriction on the position of the sliding block.
In order to describe in detail the structure and characteristics of the impact switching means of such a percussion drill, a specific example will be given and described below with reference to the drawings.

1 to 3 show the impact switching means of the percussion drill according to the present invention. According to the drawing, it includes a lower ring 20, an upper ring 12 engaged and fixed on the output main shaft 11 of a percussion drill, and a plurality of convex portions 201 formed on the outer peripheral surface thereof.

  A lock ring 21 that moves up and down is provided in the front cover 10 of the percussion drill. A plurality of grooves 211 are provided on the inner edge of the lock ring.

  When the lock ring 21 is provided on the lower ring 20, the convex portion 201 on the lower ring 20 engages with the groove 211. Therefore, the circumferential movement toward the lower wheel is limited, and the output spindle 11 of the percussion drill reciprocates only in the axial direction to achieve the purpose of giving an impact.

  A housing 24 having two bases on the left and right is provided. The upper end of the casing 24 comes into contact with the bottom of the lock ring 21, and the lock ring 21 and the casing 24 are raised simultaneously.

When the casing 24 rises, the lock ring 21 rises upward and is provided on the lower ring 20.

  The sliding block 23 is provided with installation tanks on both sides. The lower end of the housing 24 is inserted into the installation tank, and a slope 231 formed in accordance with the bottom of the housing 24 is provided at the rear end of the installation tank.

  When the sliding block 23 moves back and forth, the bottom of the casing 24 slides on the slope 231 and can achieve the purpose of rising or falling.

  The impact button 22 is connected so that the rear end extends outside the front cover 10 of the percussion drill and the front end is integrated with the rear end of the sliding block 23.

  When the impact button 22 is pressed, the sliding block 23 moves forward and the housing 24 raises the lock ring 21, and the lock ring 21 is provided on the lower wheel 20.

  When the sliding block 23 moves forward and reaches an appropriate position, positioning means must be provided in accordance with the sliding block 23 in order to fix the position of the sliding block 23.

  The positioning means in this embodiment shown comprises two abutment blocks 27 and two compression springs 29.

  The compression spring 29 is provided vertically, with the upper end contacting the inner wall of the front case 20 of the percussion drill and the lower end contacting the upper end of the contact contact block 27.

  When the sliding block 23 raises the housing 24, the contact block 27 moves downward by the elastic force of the compression spring 29, contacts the contact wall 232 at the rear end of the slide block 23, and the slide block 23 moves backward. In order to avoid this, the position of the sliding block 23 is fixed.

  This device may be provided with a center of gravity positioning means. The center-of-gravity positioning means is provided together with the positioning means, and serves to release the restriction on the position of the sliding block 23 of the positioning means.

  In the illustrated embodiment of the present invention, the center-of-gravity positioning means comprises a center-of-gravity positioning button 25, a sliding plate 26, and two center-of-gravity positioning springs 28 provided horizontally.

  The center-of-gravity positioning button 25 has a rear end extending outside the front cover 10 of the percussion drill, and is connected so that the front end is integrated with the rear end of the sliding plate 26. For convenience of operation, the center of gravity positioning button 25 is preferably provided at a position adjacent to the impact button 22 (in the illustrated embodiment, the position of the upper end of the impact button 22).

  One end of the center of gravity positioning spring 28 abuts on the inner wall of the front cover 10 of the percussion drill, and the other end abuts on the abutting plate at the front end of the sliding plate 26.

  The sliding plate 26 forms upper and lower grooves 261 having openings on both sides of the rear end. The upper and lower grooves 261 are provided so that the rear end surface thereof matches the wedge-shaped surface 271 at the lower end of the contact block 27.

  When the impact button 22 is pressed, the sliding block 23 moves forward. The contact block 27 descends from the upper / lower groove 261 and contacts the contact wall 232 at the rear end of the slide block 23.

  When the center-of-gravity positioning button 25 is pressed, the sliding plate 26 moves forward, and the rear end surface of the upper / lowering groove 261 pushes the abutment block 27 upward to release the restriction of the sliding block 23.

  In the above-described state, the sliding block 23 moves rearward, the housing 24 slides down the slope 231, the lock ring 21 is lowered, and the lower wheel 20 is restored to a rotatable state.

  The impact switching means of this device may be provided with two shafts 30. The shaft 30 is provided between the pad 13 and the internal gear 14 in the percussion drill, and a positioning portion 301 is provided in the middle.

Positioning tanks 221 and 233 are provided on the impact button 22 and the sliding block 23 in accordance with the positioning portion 301, respectively.

  When the impact button 22 is pressed, the impact button 22 and the positioning tanks 221 and 233 on the sliding block 23 are engaged with the positioning portion 301, so that the shaft 30 can be operated in the axial direction by the operation of the internal gear 14. In addition, the stability and accuracy of product operation can be improved.

  In the impact drill having the impact switching means of the present invention, when the torsional force cup 15 is rotated clockwise from the minimum torsional force button, only the electric drill button is rotated and the output torsional force is increased. Switching of the impact button cannot be achieved through the rotation of the torsional force cup 15, but switching between the screw button and the electric drill can be achieved, and switching of the impact button should be achieved only by pressing the impact button 22. Can do.

The above is a preferred embodiment of the present invention, and does not limit the scope of implementation of the present invention. Accordingly, any modifications or changes that can be made by those skilled in the art, which are made within the spirit of the present invention and have an equivalent effect on the present invention, all belong to the scope of claims for registration of the utility model of the present invention. Shall.

It is the perspective view which showed the structure of the impact switching means of the percussion drill of this invention. It is the exploded view which showed the impact switching means of the percussion drill disclosed in FIG. It is the exploded view which showed the percussion drill which provided the impact switching means of this device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Front cover 11 Output main shaft 12 Upper wheel 13 Pad 14 Internal gear 15 Torsion force cup 20 Lower wheel 201 Convex part 21 Lock ring 211 Groove 22 Impact button 221 Positioning tank 23 Sliding block 231 Slope 232 Contacting wall 233 Positioning tank 24 Housing 25 Positioning button 26 Sliding plate 261 Upper / lowering groove 27 Contact block 28 Center of gravity positioning spring 29 Compression spring 30 Shaft 301 Positioning portion

Claims (9)

A lower ring, a lock ring, a housing, a sliding block, an impact button, positioning means, and a center of gravity positioning means,
The lower ring is provided in mesh with the upper ring of the output main shaft of the percussion drill,
The lock ring is provided on the lower wheel, and can restrict the operation of the lower wheel in the circumferential direction,
The housing is provided for the upper end to contact the lock ring and the lock ring to rise and connect to the lower ring,
The sliding block is provided in accordance with the housing, and when it moves back and forth, the housing is raised or lowered,
The impact button is provided in accordance with the sliding block, the rear end is provided to extend outside the front cover of the percussion drill,
The positioning means is provided in accordance with the sliding block, and serves to fix the position of the sliding block when the housing comes into contact with the lock ring,
An impact switching means for a percussion drill, characterized in that the center of gravity positioning means is provided in accordance with the positioning means, and the positioning means serves to release the restriction on the position of the sliding block. The impact of the percussion drill according to claim 1, wherein the lower ring includes a plurality of convex portions on an outer peripheral surface, and a plurality of grooves are provided inside the lock ring so as to match the convex portions. Switching means. The sliding block is provided with an installation tank, the lower end of the housing is inserted into the installation tank, a slope is provided in the installation tank to match the bottom of the housing, and the housing slides on the slope. The impact switching means for a percussion drill according to claim 1, wherein the ring is raised. The positioning means includes an abutment block and a compression spring. When the lower end of the compression spring abuts on the abutment block and the sliding block is raised, the abutment block receives the elastic force of the compression spring. 4. The percussion drill impact switching means according to claim 1, wherein the percussion drill impact switching means fixes the position of the sliding block by moving downward through the contact with the sliding block. The center-of-gravity positioning means includes a center-of-gravity positioning button, a sliding plate, and a center-of-gravity positioning spring, the rear end of the center of gravity positioning button extends outside the front cover of the percussion drill, and the front end is connected to the sliding plate. The barrel positioning spring has one end fixed, the other end abuts against the sliding plate, and the sliding plate is provided in accordance with the wedge shape at the lower end of the abutting block, and serves to push the abutting block upward. The percussion drill impact switching means according to claim 4, wherein The sliding plate is provided with an upper / lowering groove having an opening outside the rear end, and a rear end surface of the upper / lowering groove is provided in accordance with a wedge-shaped surface at a lower end of the contact block. The impact switching means of the percussion drill according to claim 5. 6. The impact switching means for a percussion drill according to claim 5, wherein the center of gravity positioning button of the center of gravity positioning means is provided at a position adjacent to the impact button so as to be convenient for operation. The impact switching means includes two shafts, the shaft is provided between the pad in the percussion drill and the internal gear, the positioning portion is provided in the center, and the impact button and the sliding block are respectively positioned. The impact switching means for a percussion drill according to claim 4, wherein a positioning tank is provided in accordance with the portion. The impact switching means includes a shaft, the shaft is provided between the pad and the internal gear in the percussion drill, and has a positioning portion in the center, and the impact button and the sliding block are respectively aligned with the positioning portion. The impact switching means for the percussion drill according to claim 5, further comprising a positioning tank.