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Striking device

A technology of impact tools and impact hammers, applied in the direction of motor tools, manufacturing tools, etc., can solve the problems of damaged workpieces and low workability, and achieve the effects of suppressing torque loss, convenient operation, and simple switching operations

Inactive Publication Date: 2015-05-13
MAKITA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Using such an impact tool, for example, when tightening a screw on the bottom hole, at first, process the bottom hole with an electric drill, and then perform the screw tightening operation with an impact tool such as an impact driver, that is, to complete such an operation, different tools are required. tools, which require preparation and exchange of tools, resulting in poor workability
If you attach a drill to the impact driver, you can perforate. However, if you are processing fragile workpieces such as tiles, the impact force may cause damage to the workpiece.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] Such as figure 1 As shown, an impact driver 1A as an example of an impact tool has a main body shell 2 and an impact hammer cover 6, wherein the main body shell 2 is assembled by a pair of left and right half shells 3, and houses a motor 4; The impact hammer cover 6 is a shell used to house the main shaft 7, the impact mechanism 8, and the anvil 9. Its cross-section is in the shape of a bell and is installed in front of the main body shell 2 ( figure 1 Middle right). A handle 10 is provided below the main body shell 2. The handle 10 extends downwards. A battery pack (not shown) as a power source is installed at its lower end. A switch 11 with a trigger 12 is housed in the upper part of the handle 10. An extension 13 is provided on the main body shell 2. The extension 13 is located below the impact hammer cover 6 and between the impact hammer cover 6 and the trigger 12 and covers the lower part of the impact hammer cover 6. A lighting unit 14 is installed inside the front...

Embodiment approach 2

[0054] in Figure 4 In the illustrated impact driver 1B, the operating member does not slide in the left-right direction, but is of a rotary type, which is different from the first embodiment in this point. In front of the stopper pin 35, a pivot pin 50 facing downward is fixed to the lower part of the impact hammer cover 6, the middle part of the switching handle 51 is pivotally supported on the pivot pin 50, and the front part of the switching handle 50 faces The outside of the extension 13 is exposed. In addition, an arc-shaped mode switching block 52 is connected to the rear end of the switching handle 51. A concave portion 41 is formed on the upper surface of the mode switching block 52. The concave portion 41 includes a first contact surface 42 , The second contact surface 43 and the inclined surface 44. Rotate the head end of the switching handle 51 in the left and right directions, so as Figure 5 As shown, the mode switching block 52 is moved along a circular arc traje...

Embodiment approach 3

[0060] in Figure 8 The illustrated impact driver 1C is provided with two stop pins 35 that can expand and contract in the radial direction of the impact hammer cover 6, which is different from the second embodiment in this point. Specifically, such as Picture 10 As shown, a pair of stop pins 35 are pivotally supported by ball bearings 36, and the pair of stop pins 35 pass through the axis of the main shaft 7 and are symmetrical with respect to a straight line in the vertical direction, and are inclined at a predetermined angle with respect to the straight line. , The stopper pin 35 is energized by the coil spring 38 to the lower retracted position. In addition, the extension portion 13 is formed in a circular arc shape (viewed from the front) and is located on the lower side of the impact hammer cover 6 including a pair of stop pins 35. The extension portion 13 is provided with a mode switching disk 53. Both ends of the mode switching disk 53 are respectively formed with rec...

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Abstract

Disclosed is an impact driver such that it is possible to make a changeover to a drill mode without impairing workability. The impact driver (1A) is provided with a stop pin (35) which, forward of a handle (10), protrudes into a hammer case (6) in the lower part of the hammer case (6), and is slidable between a protrusion position and a retreat position, the aforementioned protrusion position being a location where the stop pin (35) engages a hammer (22) in an advanced position to restrict the retreat of the hammer (22), and the aforementioned retreat position being a location where the stop pin (35) disengages the hammer (22) to allow the same to retreat; a coil spring (38) which applies force to press the stop pin (35) to the retreat position; and a mode changeover button (40) which, by being operated from the outside, resists the force applied by the coil spring (38) and causes the stop pin (35) to slide from the retreat position to the protrusion position. When the stop pin (35) is moved to the protrusion position by means of the mode changeover button (40), then the retreat of the hammer (22) is restricted and thereby the hammer (22) is prevented from engaging or disengaging arms (21, 21), with the result that an anvil (9) is made to rotate integrally with a spindle (7).

Description

Technical field [0001] The present invention relates to an impact tool such as an impact driver. The impact tool such as an impact driver has an anvil protruding forward of a housing, and the screwdriver can generate a rotational impact force on the anvil. Background technique [0002] An impact tool such as an impact driver has a main shaft, an impact hammer, an anvil, and a coil spring. The main shaft is located in the housing and can be driven by a motor to rotate; the impact hammer is sleeved on the main shaft and the two are provided with grooves. The ball is fitted, and the two are connected by the ball. In addition, a pair of claws are protrudingly provided on the front surface of the impact hammer; the anvil is pivotally supported on the housing and coaxial with the impact hammer, which is used to install the front end of the working head It extends to the front of the housing, and a pair of arms are formed at the rear end in the radial direction; the coil spring is used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25B21/02
CPCB25B21/026B25B21/00
Inventor 平林德夫杉本学江口健太
Owner MAKITA CORP
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