JP3192507U - Blow drive tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a striking drive tool having a simple structure and extending a service life. A grip 10, a shell member 20, a striking member 30, and a ratchet 40 are provided, a drive motor 11 is installed on the grip, and the shell member is attached to the grip. The striking member is rotatably mounted inside the shell member and includes a striking frame, a hammer, and a striking shaft. The striking frame is interlocked with the drive motor, and the hammer is fitted into the striking frame and interlocked with the striking frame. The striking shaft is rotatably attached to the striking frame so as to be inserted into the hammer, and when the drive motor is driven, the striking frame and the hammer are interlocked to rotate in one direction, and the convex edge of the hammer is formed. The striking shaft can be rotated by abutting the contact edge of the striking shaft. The ratchet is placed in the rotating space of the shell member and can work with the striking shaft to twist the bolt or nut. [Selection diagram] Fig. 1

Description

  The present invention particularly relates to a drive tool for twisting or removing a bolt or nut.

  The assembly or removal of the machine is mostly performed using bolts and nuts, and conventionally the bolts or nuts are twisted by manual work, but nowadays there are drive tools such as air tools or electric tools, so the bolts or nuts are It became more labor-saving to twist.

  As shown in FIG. 9, the existing driving tool includes a striking member 60 inside, and the striking member 60 includes a ring 61, a hammer 62, and a shaft 63. The shaft 63 is inserted into the ring 61 and the hammer 62, the through hole 621 is formed in the central portion of the hammer 62, and the two concave portions 622 are formed in the inner peripheral surface of the through hole 621. Is.

However, existing hitting members have the following drawbacks.
1. The hammer of the striking member has a structure for driving it clockwise or counterclockwise by a motor. However, if a ratchet is attached to an ordinary driving tool, it has the same effect and has no hammer structure. However, there is a manufacturing cost.
2. Since sharp corners are formed on both sides of the concave part of the hammer, the hammer becomes fragile if it is struck for a long time, and the hammer and the shaft have a unique shape. The production cost was high.
3. Since the length of the shaft of the striking member is long, the shaft will be bent or deformed upon impact when hitting, and a new shaft must be changed.

In order to solve the above-described problem, the impact driving tool according to the present invention includes a grip, a shell member, an impact member, and a ratchet.
The grip is provided with a drive motor at one end, and a drive shaft is provided at one end of the drive motor.
The shell member is attached to one end of the grip so as to cover the drive motor, and a rotation space is formed inside, and the shell member is inserted in the vertical direction so as to communicate with the rotation space at the end opposite to the grip. A hole is formed,
The striking member is rotatably mounted in a rotation space of the shell member, and includes a striking frame, a hammer, and a striking shaft. The striking frame is attached to be interlocked with a drive motor, and the mounting space is provided inside. The hammer is fitted into the mounting space so that the other side can be moved in the vertical direction with one side as a fulcrum, and the upper and lower portions extend from the mounting space, and a rotation hole is formed at the center. A rotation recess is provided in the inner peripheral surface of the hole, a convex edge is provided in the vicinity of the rotation recess on the inner peripheral surface of the rotation hole, and the striking shaft is inserted into the rotation hole of the hammer. Attached to the striking frame so as to be rotatable, a contact shaft and an eccentric portion are provided, a contact edge portion is provided on the outer peripheral surface of the corresponding contact shaft, and an eccentric shaft is provided at an end of the eccentric portion opposite to the contact shaft. However, driving the drive motor When the frame and the hammer are rotated in one direction in conjunction with each other, the convex edge of the hammer contacts the abutting edge of the striking shaft to rotate the striking shaft, and the driving motor is driven to rotate the striking frame and the hammer. When rotating in the opposite direction, the hammer does not twist the striking shaft so that it does not abut against the striking shaft,
The ratchet is disposed in the rotation space of the shell member, and is connected so as to be interlocked with the eccentric portion of the striking shaft. One end protrudes from the insertion hole of the shell member, and an adjustment switch is installed at the protruding end. A tool head is attached to the other end opposite to.

  In such an impact driving tool, it is preferable that the inner peripheral surface of the rotation hole is composed of two arc surfaces having different radii, and the rotation recess is formed between the arc surfaces.

  In such an impact driving tool, it is preferable that a sharp edge is provided on one side of the contact edge and an edge arc surface is provided on the other side.

  In such a hitting drive tool, it is preferable that the hitting shaft is integrally formed to extend in the front-rear direction.

  In such a striking drive tool, the striking shaft includes a plurality of detachable members, and includes a contact shaft, an eccentric portion, and an assembly tube, and the assembly shaft is detachable from the contact shaft and the eccentric portion. It is preferable to be attached in between.

In such an impact driving tool, a first mounting surface is formed on the outer peripheral surface of the end opposite to the contact edge of the contact shaft,
A second mounting surface is provided on the outer peripheral surface of the end opposite to the eccentric shaft of the eccentric portion;
Mounting recesses are respectively provided at both ends of the assembly tube,
Preferably, the first mounting surface and the second mounting surface are respectively engaged with the mounting recesses.

  In such an impact driving tool, it is preferable that the first mounting surface, the second mounting surface, and the mounting recess each have a polygonal shape.

As described above, the impact driving tool according to the present invention has the following advantages.
1. By switching the adjustment switch of the ratchet, the rotation direction of the tool head can be easily changed. Therefore, the structure of the grip and the striking member becomes simpler than the existing striking drive tool, and the service life of the parts can be extended.
2. A convex edge is formed on the inner peripheral surface of the rotation hole of the hammer, a sharp edge is provided on one side, and an arcuate surface is provided on the other side of the contact shaft of the hammering shaft. Provides control that the hammer of the striking member can only drive the ratchet in one direction.
3. The hammer can be easily machined and the thickness of the hammer can be made thicker than existing parts, extending the service life.
4. Since the striking shaft of the striking member is made up of a plurality of detachable members, if the striking shaft part is bent or partially deformed in use, only that part may be changed. It is not necessary to change the striking shaft, and costs can be saved.

1 is a partial cross-sectional perspective view of a first embodiment of an impact driving tool according to the present invention. 1 is an exploded perspective view of a driving motor and a striking member of a first embodiment of a striking drive tool according to the present invention. 1 is an exploded perspective view of a striking member of a first embodiment of a striking drive tool according to the present invention. It is a perspective view of the contact axis | shaft of the impact shaft of the 1st Example of the impact drive tool which concerns on this invention. It is sectional drawing which shows the state which rotates a striking member clockwise in the 1st Example of the striking drive tool which concerns on this invention. It is sectional drawing which shows the state which rotates a striking member counterclockwise in the 1st Example of the striking drive tool which concerns on this invention. It is a fragmentary sectional perspective view of the 2nd example of an impact drive tool concerning the present invention. It is a disassembled perspective view of the striking member of the second embodiment of the striking drive tool according to the present invention. It is a disassembled perspective view of the existing drive tool.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the following Example is only what showed the preferred embodiment of this invention, and the technical scope of this invention is not limited to the following Example itself at all.

  As shown in FIG. 1, the first embodiment of the impact driving tool according to the present invention includes a grip 10, a shell member 20, an impact member 30, and a ratchet 40.

  As shown in FIGS. 1 and 2, the grip 10 extends in the front-rear direction, a drive motor 11 is installed at the front end, and a drive shaft 110 is provided at the front end of the drive motor 11, A plurality of teeth are formed on the outer peripheral surface of the drive shaft 110, and a button 12 for driving and stopping the drive motor 11 is installed on the outer peripheral surface of the grip 10. Since this grip 10 is a well-known technique, detailed description is abbreviate | omitted.

  As shown in FIG. 1, the shell member 20 is assembled from a plurality of thin cases, and is attached to the front end of the grip 10 so as to cover the drive motor 11. A rotating space 21 is formed inside the shell member 20. An insertion hole 22 perpendicular to the longitudinal direction of the grip 10, that is, the vertical direction is formed so as to communicate with the rotation space 21 at the opposite end.

  2 and 3, the striking member 30 is rotatably attached to the rotation space 21 of the shell member 20, and includes a striking frame 31, a hammer 32, a pin 33, and a striking shaft 34. The striking frame 31 includes a connecting plate 311 and a fixed plate 312 that are attached to one side of the driving motor 11 and are parallel to each other with a space therebetween, and a meshing engagement for engaging the driving shaft 110 at the center of the connecting plate 311. A hole 313 is formed, a plurality of teeth are formed on the inner peripheral surface of the engagement hole 313, and the teeth of the engagement hole 313 are engaged with the teeth of the drive shaft 110. A mounting space 314 is formed between the connecting plate 311 and the fixed plate 312 in the striking member 30, and a mounting hole 315 that is coaxial with the engagement hole 313 is formed at the center of the fixed plate 312. A through-hole 316 that penetrates the connecting plate 311 and the fixing plate 312 is formed on both sides.

  As shown in FIGS. 2 and 3, the hammer 32 is rotatably fitted in the mounting space 314, the upper and lower portions extend from the mounting space 314, a rotation hole 321 is formed at the center, and the rotation hole 321. A rotating recess 322 is provided on the inner peripheral surface of the rotating hole 321, and a convex edge 323 is provided in the vicinity of the rotating recess 322 on the inner peripheral surface of the rotating hole 321. Among them, the inner peripheral surface of the rotation hole 321 is composed of two arc surfaces having different radii, and the rotation concave portion 322 is formed between the arc surfaces and is semicircular on the right side of the outer peripheral surface of the hammer 32. Is formed, and a long moving recess 325 is formed on the left side of the outer peripheral surface of the hammer 32.

  The hammer 32 is fitted into the mounting space 314. The pin 33 is inserted into the engaging recess 324 and the moving recess 325 and is inserted into the through hole 316 of the striking frame 31. The hammer 32 can move in the vertical direction via the pin 33 on the moving recess 325 so that the pin 33 on the engagement recess 324 serves as a fulcrum.

  As shown in FIGS. 3 and 4, the striking shaft 34 is integrally formed to extend in the front-rear direction, passes through the mounting hole 315, contacts the side wall of the meshing hole 313, and contacts the shaft 341. And an eccentric part 342, a contact edge part 3411 is projected on the outer peripheral surface of the corresponding contact shaft 341, a sharp edge part 3412 is provided on one side of the corresponding contact edge part 3411, and the other side of the corresponding contact edge part 3411. Is provided with an edge arc surface 3413, and an eccentric shaft 3421 is provided at an end of the eccentric portion 342 opposite to the contact shaft 341. When the impact shaft 34 is mounted, the contact shaft 341 is inserted into the rotation hole 321, and the contact edge 3411 is contacted with the convex edge 323.

  As shown in FIG. 1, the ratchet 40 is disposed in the rotation space 21 of the shell member 20, one end protrudes from the insertion hole 22 of the shell member 20, and an adjustment switch 41 is installed at the protruding end. A tool head 42 is attached to the other end opposite to this, and the rotation direction of the tool head 42 can be adjusted by this adjustment switch 41. Further, when the ratchet 40 is connected to the eccentric portion 342 of the striking shaft 34 and the eccentric shaft 3421 is rotated, the bolt or nut can be twisted while the ratchet 40 is interlocked. Since this ratchet 40 is a well-known technique, description here is abbreviate | omitted.

  As shown in FIGS. 1 and 5, when the user holds the grip 10 and presses the button 12, the driving motor 11 can be driven to rotate the striking frame 31 of the striking member 30. When the drive motor 11 is rotated clockwise, the hammer 32 is rotated in conjunction with the striking frame 31 rotating in the same direction. When the hammer 32 rotates to a predetermined angle, the hammer 32 moves up and down. At this time, the convex edge 323 comes into contact with the sharp edge 3412 in the vicinity of the contact edge 3411 of the impact shaft 34 to rotate the impact shaft 34. The ratchet 40 can be driven. On the other hand, if the torque from the tool head 42 of the ratchet 40 becomes larger than the torque from the striking member 30, the hammer 32 will not come into contact with the striking shaft 34, and the hammer 32 will not twist the striking shaft 34.

  As shown in FIGS. 1 and 6, only one convex edge 323 is provided on the inner peripheral surface of the rotation hole 321 of the hammer 32, and an edge arc is formed on the side opposite to the sharp edge 3412 of the contact shaft 341. Since the surface 3413 is formed, even if the drive motor 11 is rotated counterclockwise and the hammer 32 is rotated, the hammer 32 does not contact the striking shaft 34 and the ratchet 40 is rotated by the striking member 30. There is nothing.

  According to this, since the striking member 30 can drive the ratchet 40 only in one direction, the striking member 30 is simpler and the grip 10 is simpler, and if the adjustment switch 41 of the ratchet 40 is switched. The rotation direction of the tool head 42 can be easily changed. Furthermore, since only one convex edge 323 is formed in the rotation hole 321 of the hammer 32 and the hammer 32 receives torque in one direction, the hammer 32 can be easily processed in manufacturing, and the thickness of the hammer 32 is also existing. It can be thicker than the ones and can extend the service life.

  As shown in FIGS. 7 and 8, the second embodiment according to the present invention is almost the same as the first embodiment, but differs in the following points. The striking shaft 34A of the striking member 30A is composed of a plurality of detachable members, and includes a contact shaft 341A, an eccentric portion 342A, and an assembly tube 343, and a contact edge 3411 is provided at one end of the corresponding contact shaft 341A. A first mounting surface 3414 having a polygonal shape is formed on the outer peripheral surface of the end opposite to the corresponding edge portion 3411, and an eccentric shaft 3421 is extended to one end of the eccentric portion 342 </ b> A, and the end opposite to the eccentric shaft 3421 A second mounting surface 3422 corresponding to the abutting shaft 341A is provided on the outer peripheral surface of the first tube, and polygonal mounting recesses 3431 are respectively provided at both ends of the assembly tube 343, and the first mounting surface 3414 and the second mounting surface 3422 are provided. Are respectively engaged with the mounting recesses 3431, whereby the striking shaft 34A can be assembled.

  This embodiment is different from the first embodiment in the configuration described above, but the other structure or operation method is the same. In this embodiment, when the hitting shaft 34A is used, if the abutting shaft 341A or the eccentric part 342A is curved or partially deformed, only that part may be changed, and all the parts of the hitting shaft 34A can be changed. The cost can be saved without having to change.

DESCRIPTION OF SYMBOLS 10 Grip 11 Drive motor 110 Drive shaft 12 Button 20 Shell member 21 Rotating space 22 Insertion hole 30, 30A Impact member 31 Impact frame 311 Connecting plate 312 Fixing plate 313 Mating hole 314 Mounting space 315 Mounting hole 316 Through hole 32 Hammer 321 Rotation Hole 322 Rotating recess 323 Protruding edge 324 Engaging recess 325 Moving recess 33 Pin 34, 34A Strike shaft 341, 341A Contact shaft 3411 Contact edge 3412 Sharp edge 3413 Edge arc surface 3414 First mounting surface 342, 342A Eccentric portion 3421 Eccentric shaft 3422 Second mounting surface 343 Assembly tube 3431 Mounting recess 40 Ratchet 41 Adjustment switch 42 Tool head 60 Strike member 61 Ring 62 Hammer 621 Through-hole 622 Concave 63 Shaft

Claims (7)

A grip, a shell member, a striking member, and a ratchet;
The grip is provided with a drive motor at one end, and a drive shaft is provided at one end of the drive motor.
The shell member is attached to one end of the grip so as to cover the drive motor, and a rotation space is formed inside, and the shell member is inserted in the vertical direction so as to communicate with the rotation space at the end opposite to the grip. A hole is formed,
The striking member is rotatably mounted in a rotation space of the shell member, and includes a striking frame, a hammer, and a striking shaft. The striking frame is attached to be interlocked with a drive motor, and the mounting space is provided inside. The hammer is fitted into the mounting space so that the other side can be moved in the vertical direction with one side as a fulcrum, and the upper and lower portions extend from the mounting space, and a rotation hole is formed at the center. A rotation recess is provided in the inner peripheral surface of the hole, a convex edge is provided in the vicinity of the rotation recess on the inner peripheral surface of the rotation hole, and the striking shaft is inserted into the rotation hole of the hammer. Attached to the striking frame so as to be rotatable, a contact shaft and an eccentric portion are provided, a contact edge portion is provided on the outer peripheral surface of the corresponding contact shaft, and an eccentric shaft is provided at an end of the eccentric portion opposite to the contact shaft. However, driving the drive motor When the frame and the hammer are rotated in one direction in conjunction with each other, the convex edge of the hammer contacts the abutting edge of the striking shaft to rotate the striking shaft, and the driving motor is driven to rotate the striking frame and the hammer. When rotating in the opposite direction, the hammer does not twist the striking shaft so that it does not abut against the striking shaft,
The ratchet is disposed in the rotation space of the shell member, and is connected so as to be interlocked with the eccentric portion of the striking shaft. One end protrudes from the insertion hole of the shell member, and an adjustment switch is installed at the protruding end. A hammer driving tool, characterized in that a tool head is attached to the other end opposite to. The inner peripheral surface of the rotation hole is composed of two arc surfaces with different radii,
The impact driving tool according to claim 1, wherein the rotating recess is formed between the arc surfaces.   The striking drive tool according to claim 2, wherein a sharp edge portion is provided on one side of the contact edge portion, and an edge arc surface is provided on the other side.   The impact driving tool according to any one of claims 1 to 3, wherein the impact shaft is integrally formed to extend in the front-rear direction.   The hitting shaft is composed of a plurality of detachable members, and includes a contact shaft, an eccentric portion, and an assembly tube, and the assembly tube is detachably attached between the contact shaft and the eccentric portion. The striking drive tool according to any one of claims 1 to 3, wherein the striking drive tool is provided. A first mounting surface is formed on the outer peripheral surface of the end opposite to the contact edge of the contact shaft,
A second mounting surface is provided on the outer peripheral surface of the end opposite to the eccentric shaft of the eccentric portion;
Mounting recesses are respectively provided at both ends of the assembly tube,
The impact driving tool according to claim 5, wherein the first mounting surface and the second mounting surface are engaged with mounting recesses, respectively.   The impact driving tool according to claim 6, wherein the first mounting surface, the second mounting surface, and the mounting recess each have a polygonal shape.

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