Unlock instant, AI-driven research and patent intelligence for your innovation.

Impact tool

A technology of impact tools and spindles, which is applied in the field of impact tools, can solve the problems such as the decrease of the fixing accuracy of the washer 81, and achieve the effect of size reduction

Inactive Publication Date: 2016-08-03
HITACHI KOKI CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] When the step difference La is small, the contact area between the inner surface of the washer protrusion 813 and the outer peripheral surface of the stepped portion becomes smaller, with the result that the fixing accuracy of the washer 81 is lowered.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Impact tool
  • Impact tool
  • Impact tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] One example of an impact driver (impact tool) to which the present invention is applied will be described. image 3 is a cross-sectional view of the impact driver 1 and corresponds to figure 1 . Similar to the impact driver 200 described above, the impact driver 1 includes a handle 10 , a case 20 , and a battery attachment unit 30 , and the battery 300 is attached to the battery attachment unit 30 . The motor 21 , anvil 22 , planetary gear mechanism 23 , hammer 25 and the like housed in the housing 20 are also the same as those provided in the impact driver 200 . The structure in which the anvil 22 is driven by the spindle 24 and the hammer 25 is also the same as the above-mentioned structure. Specifically, the spindle 24 includes a spindle shaft portion 241 and a bearing portion 242 . A spindle cam groove 243 is formed on the spindle shaft portion 241 , and the spindle cam groove 243 and the hammer cam groove 251 are joined to each other. The movements of the spind...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An impact tool includes: a spindle which makes a rotation motion; a hammer which makes a reciprocating motion in a longitudinal direction; a spring whose front end is supported on the hammer side and rear end is supported on the spindle side; and a stopper fixed to the spindle so that it abuts on the hammer when the hammer is moved rearward, and the rear end of the spring and the stopper are mutually overlapped with each other in the longitudinal direction.

Description

technical field [0001] The present invention relates to impact tools, such as impact drivers and impact wrenches. Background technique [0002] Impact tools using an electric motor or an air motor as a drive source are known. Impact tools apply impact and rotational forces to objects such as screws, bolts, nuts, and the like. Patent Document 1 discloses the structure of an impact driver as one of impact tools. figure 1 It is a sectional view showing the structure of a portable electric impact driver. figure 1 A cross-section of impact driver 200 is shown taken along the axis of rotation of anvil 22 . This impact driver 200 has a handle 10 which is held by a worker during use. On the upper side of the handle 10 is provided a housing 20 in which a motor 21 serving as a driving source and the like are mounted. On the lower side of the handle 10 is provided a battery attachment unit 30 to which a battery 300 serving as a power source is attached. Battery 300 includes a plu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B25B21/02B25F5/00
CPCB25B21/02B25F5/00B25F5/001B25B21/026B23P19/066B25B23/147
Inventor 小室义广田村健悟
Owner HITACHI KOKI CO LTD