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CN-115194693-B - Work tool and impact tool

CN115194693BCN 115194693 BCN115194693 BCN 115194693BCN-115194693-B

Abstract

The invention provides a working tool which can smoothly switch operation modes and has good assembling property of a rod component. The impact driver (1) includes a mode conversion ring (6), a link portion (286) of a mode conversion fork (285) that swings via a support shaft (289) in response to operation of the mode conversion ring (6), and a hammer sleeve that moves linearly in conjunction with the swing of the link portion (286). The support shaft (289) is inserted into the link (286) so that the link (286) can be swung, and the insertion portion of the support shaft (289) of the link (286) is a slotted hole (288) extending along the link (286).

Inventors

  • KAMIYA TAKASHI

Assignees

  • 株式会社牧田
  • 株式会社牧田

Dates

Publication Date
20260421
Application Date
20220325
Priority Date
20210402

Claims (9)

  1. 1. A work tool, comprising: An operation member; A lever member that swings via a support shaft in response to an operation of the operation member, and A switching member that moves linearly in conjunction with the swing of the lever member, The work tool is characterized in that, The fulcrum shaft is inserted into the lever member to enable the lever member to swing, the insertion portion of the fulcrum shaft of the lever member is a long hole extending along the lever member, The switching member is provided inside the housing, the operating member and the lever member are provided outside the housing, the support shaft protrudes from an outer surface of the housing, The casing is provided with a striking part including a main shaft and a hammer externally attached to the main shaft, and the switching member is a sleeve member externally attached to the hammer and movable in an axial direction.
  2. 2. The work tool of claim 1, wherein the tool comprises a handle, And a locking pin provided at an end of the lever member is locked to the switching member, and the lever member and the switching member are linked.
  3. 3. The work tool of claim 2, wherein the tool comprises a handle, The locking pin is locked to the switching member along a linear movement direction of the switching member via a linear guide hole provided in the housing.
  4. 4. The work tool of claim 2, wherein the tool comprises a handle, An annular groove is formed on the outer periphery of the sleeve member, and the locking pin is locked in the annular groove.
  5. 5. The work tool of claim 4, wherein the tool comprises a handle, The lever members are provided with a pair of the lever members, and one end portions are connected to each other by a connecting portion that swings in response to an operation of the operation member, and the engagement pins provided at the other end portions of the lever members are engaged with the ring grooves, respectively.
  6. 6. The work tool of claim 5, wherein the tool comprises a handle, The locking pin is arranged at a point-symmetrical position with respect to an axis of the sleeve member.
  7. 7. The work tool according to any one of claims 1 to 6, wherein, The operation member is provided for switching the operation mode.
  8. 8. The work tool of claim 7, wherein the tool comprises a handle, The operation member switches the operation mode by a rotation operation.
  9. 9. The work tool of claim 1, further comprising: a motor; An anvil rotated by the motor; A hammer that strikes the anvil in a rotational direction; a sleeve member for switching an operation mode, the sleeve member being externally attached to the hammer; A ring groove provided on the outer periphery of the sleeve member, and A locking part locked in the ring groove, The lever member moves the locking portion only in the axial direction of the sleeve member.

Description

Work tool and impact tool Technical Field The present invention relates to a working tool such as an impact driver having an operation mode switching portion and an impact tool. Background In a power tool such as an electric tool or a pneumatic tool, the operation mode can be switched by changing the position of a switching member of an internal mechanism. For example, patent document 1 discloses an electric tool in which an internal gear of a speed reduction unit is provided so as to be slidable in an axial direction in a housing, and the output speed can be changed by changing the position of the internal gear. Here, a shift arm (lever member) is provided on the outside of the housing. The shift arm is rotatably supported by protrusions (support shafts) provided on the left and right sides of the housing, and pins provided on the left and right ends are engaged with an internal gear (switching member) via through holes provided in the housing. The middle part of the shift arm is connected with a shift knob (operating member). If the operating member is slid, the shift arm can swing centering on the protrusion, thereby sliding the internal gear in the axial direction. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2585716 (FIG. 4) Disclosure of Invention Since the conventional shift arm swings around the protrusion, the pin is deviated from the axial center of the internal gear by rotation. Accordingly, if the stroke of the internal gear increases, the internal gear tilts, which may cause the pin to fall off or cause a switching failure. In addition, when the shift arm is assembled to the projection, the shift arm needs to be bent, and if the rigidity of the shift arm is high, the assembly becomes difficult. Accordingly, an object of the present invention is to provide a working tool and an impact tool that can smoothly switch operation modes and that can improve the ease of assembly of a lever member. In order to achieve the above object, a first aspect of the present invention is a work tool including: An operation member; A lever member that swings via a support shaft in response to an operation of the operation member, and A switching member that moves linearly in conjunction with the swing of the lever member, The work tool is characterized in that, The support shaft is inserted into the lever member so as to be capable of swinging the lever member, and an insertion portion of the support shaft of the lever member is a long hole extending along the lever member. In order to achieve the above object, a second aspect of the present invention is an impact tool comprising: a motor; an anvil rotated by the motor; A hammer that strikes the anvil in a rotational direction; a sleeve member for switching an operation mode, the sleeve member being externally attached to the hammer; a ring groove provided on the outer periphery of the sleeve member; a locking part locked in the ring groove, and And a link portion that moves the locking portion only in the axial direction of the sleeve member. Effects of the invention According to the present invention, the operation mode can be smoothly switched, and the ease of assembly of the lever member is also improved. Drawings Fig. 1 is a side view of an impact driver. Fig. 2 is a top view of the impact driver. Fig. 3 is a rear view of the impact driver. Fig. 4 is a perspective view of the impact driver from the rear. Fig. 5 is an explanatory view of the impact driver in which the right half-cut casing is omitted and the main body is shown in a central longitudinal section. Fig. 6 is a partial perspective view of the impact driver in a state where the rear cover is removed, fig. 6A shows the partial perspective view from the front, and fig. 6B shows the partial perspective view from the rear. Fig. 7 is an enlarged sectional view taken along line A-A of fig. 1. Fig. 8 is an exploded perspective view of the main body portion of the main body case. Fig. 9 is an explanatory view of the working unit, fig. 9A shows a side surface, and fig. 9B shows a front surface. Fig. 10 is an enlarged sectional view taken along line C-C of fig. 9B. Fig. 11 is an enlarged sectional view of fig. 9B taken along line D-D. Fig. 12A is a partial sectional view taken along line E-E of fig. 9B, fig. 12B is a partial sectional view taken along line F-F of fig. 9B, and fig. 12C is a partial sectional view taken along line G-G of fig. 9B. Fig. 13 is an enlarged sectional view taken along line B-B of fig. 1. Fig. 14 is an exploded perspective view of the speed reducing portion as seen from the rear. Fig. 15A shows a section of the line H-H of fig. 10, fig. 15B shows a section of the line I-I of fig. 10, and fig. 15C shows a section of the line J-J of fig. 10. Fig. 16A shows a K-K line section of fig. 10, fig. 16B shows an L-L line section of fig. 10, and fig. 16C shows an M-M line section of fig. 10. Fig. 17 is an exploded perspective view of the speed