KR101636689B1 - locking structure of electric powered tool - Google Patents

locking structure of electric powered tool Download PDF

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Publication number
KR101636689B1
KR101636689B1 KR1020150129119A KR20150129119A KR101636689B1 KR 101636689 B1 KR101636689 B1 KR 101636689B1 KR 1020150129119 A KR1020150129119 A KR 1020150129119A KR 20150129119 A KR20150129119 A KR 20150129119A KR 101636689 B1 KR101636689 B1 KR 101636689B1
Authority
KR
South Korea
Prior art keywords
locking
anvil
driver bit
locking member
inner holder
Prior art date
Application number
KR1020150129119A
Other languages
Korean (ko)
Inventor
김대진
Original Assignee
이에스산업 주식회사
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Filing date
Publication date
Application filed by 이에스산업 주식회사 filed Critical 이에스산업 주식회사
Priority to KR1020150129119A priority Critical patent/KR101636689B1/en
Application granted granted Critical
Publication of KR101636689B1 publication Critical patent/KR101636689B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0035—Connection means between socket or screwdriver bit and tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

According to the present invention, a locking structure of an electric tool can omit a pre-manipulation step of moving, in advance, a locking sleeve to a releasing position to enable a driver bit to be mounted in an inner holder of an anvil to improve user convenience since the locking sleeve is automatically moved when first to third locking members having different shapes, receiving positions, and sizes are moved to the releasing position by a force of inserting the driver bit into the inner holder of the anvil. Moreover, the present invention increases durability of an electric tool by removing damage generated by an excessive collision between the driver bit and the first locking member.

Description

[0001] The present invention relates to a locking structure of an electric powered tool,

The present invention relates to a locking structure for a power tool, and more particularly, to a locking structure for a power tool that allows a driver bit to be locked in an inner holder of an anvil without manipulation of the locking sleeve.

As shown in FIG. 1, the portable power tool 100 of the well-known publicly known patent publication No. 2014-0078699 (May 2014.06.25) includes a rechargeable battery pack 130 detachably coupled to a lower portion thereof, And a housing 110 which is formed on the handle 126 and generates power by a power source applied from the battery pack 130. [

The housing 110 includes a forward / reverse motor (not shown) for generating a rotational power therein, and a speed change portion (not shown) for shifting the rotational force of the motor. A driver bit 140 The anvil 150 is configured to be locked and mounted, and the anvil 150 is rotationally driven by receiving a rotational force from a speed change portion inside the housing 110.

2, the anvil 150 includes an outer holder 210 and an inner holder 290 and is integrally formed with the output shaft 124. The inner holder 290 includes a driver bit 140 The driver bit 140 may be locked in the inner holder 290 by a locking device 240 assigned to the anvil 150 and the locking device 240 may be coupled to the locking sleeve 240 500).

At this time, two locking members 311, 312, 313 and 314 are assigned to the locking device 240 and the locking members 311, 312, 313 and 314 are urged by the actuating member 510 in the locking position of the locking sleeve 500 .

The locking sleeve 500 is configured to unlock from the locking position in the axial direction 499 away from the power tool 100 against the spring force provided by the associated spring member 242 for unlocking the driver bit 140. [ Position.

The locking sleeve 500 includes an actuating member 510 and a supporting member 560. The actuating member 510 and the supporting member 560 are coupled to each other by a threaded portion 350, The member 560 is urged by the associated spring member 242 in the direction of the locking position of the locking sleeve 500 and the actuating member 510 is moved from the locking position to the unlocked position of the locking sleeve 500 And is configured to allow movement.

However, since the conventional portable electric power tool 100 configured as described above has a structure in which the locking sleeve 311, 312, 313, and 314 can be pushed outward in the outer direction only by moving the locking sleeve 500 to the unlocking position, When the driver bit 140 is inserted into the inner holder 290 of the anvil 150 without activating the locking members 311, 312, 313 and 314, the locking members 311, 312, 313 and 314 can not be locked.

That is, when the driver bit 140 is to be locked to the inner holder 290 of the anvil 150, the driver bit 140 is moved with the other hand while the locking sleeve 500 is held by the unconditioned hand to be moved to the unlocking position The locking member 311, 312, 313, 314 and the driver bit 140 are not in contact with each other without the lock-releasing operation of the locking sleeve 500 as well as the operation is complicated and inconvenient because the locking member 311 is inserted into the inner holder 290 of the anvil 150, There is a problem that the locking device 240 is easily broken and the service life is shortened.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the preliminary operation step of moving the locking sleeve to the unlocking position in order to mount the driver bit on the inner holder of the anvil, And it is an object of the present invention to provide a locking structure for a power tool which can extend the service life of the power tool by eliminating the possibility of breakage caused by forcible collision of the driver bit with the first locking member.

According to an aspect of the present invention, there is provided a locking structure for a power tool, including: an anvil having an inner holder formed to insert or separate a driver bit having a locking groove; And a locking sleeve formed on an outer circumferential surface of the anvil and adapted to be moved to a locking position or an unlocking position along an axial direction of the anvil, In the locking structure,

The receiving space portion is configured to have a different shape and accommodating position and size so as to be aligned with the locking position to press the driver bit inserted into the inner holder or to be pushed when the driver bit is inserted into and detached from the inner holder The first to third locking members are received,
Wherein an opening hole is formed at one side of the accommodation space so as to be wider than a lateral width of the first and second locking members so that the first and second locking members are vertically stacked in the locking position or inclined to the unlocking position, A stepped surface is formed on the upper portion so that the rear end of the third locking member is extended,
Wherein the first locking member is formed in the shape of a circle having a diameter larger than that of the second locking member and is provided so as to face toward the inner holder in the opening hole and the second locking member is formed in the shape of an ellipse, Wherein the third locking member is formed in a cylindrical shape and is provided so as to face the second locking member in the axial direction while covering the stepped surface in the opening hole,
And a ring spring is wound around the outer circumferential surface of the anvil for applying elasticity so that the third locking member is pressed to the locking position.

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The locking structure of the power tool of the present invention is characterized in that when the first to third locking members having different shapes and receiving positions and sizes are moved to the unlocking position by a force for inserting the driver bit into the inner holder of the anvil, It is possible to omit the preliminary operation step of moving the locking sleeve to the unlocking position in advance so that the driver bit is mounted to the inner holder of the anvil, so that the convenience of use can be improved, So that the life of the power tool can be prolonged.

1 is a perspective view of a conventional portable power tool,
FIG. 2 is a sectional view showing a state where a driver bit is mounted on a conventional anvil;
3 is a sectional view showing a state before a driver bit is locked to an inner holder of an anvil according to the present invention,
4 is a sectional view showing a state in which a driver bit is inserted into an inner holder of an anvil according to the present invention to operate a locking member,
5 is a cross-sectional view illustrating a state in which a driver bit is locked in an inner holder of an anvil according to the present invention;
6 is a cross-sectional view illustrating a state in which the locking sleeve is operated so that the driver bit can be unlocked from the inner holder of the anvil according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 3 to 6. FIG.

The locking structure of the power tool of the present invention includes an anvil 34 in which an inner holder 32 is formed to insert or separate a driver bit 30 having a locking groove 30a, A pair of upper and lower receiving space portions 36 formed so as to be connected to the intermediate portion of the length side of the inner holder 32 so as to be connected to each other and a pair of upper and lower receiving space portions 36 accommodated in the receiving space portion 36, And a pair of upper and lower pairs of upper and lower pairs arranged in an unlocking position so as to be pushed when the driver bit 30 is inserted into and detached from the inner holder 32. [ A third locking member 38b which is wound on the third locking member 38c with respect to the outer circumferential surface of the anvil 34 so as to be elastically urged so that the third locking member 38c is pressed to the locking position, 40), an annular groove (34) provided on the outer peripheral surface of the anvil (34) By moving consists of the first through the third locking member (38a) 38b) (38c) the locking sleeve (42 for controlling so that the pressure or pushed into the locking release position to the locked position).

At this time, the accommodating space portion 36 is formed such that the first and second locking members 38a and 38b are vertically stacked at one side thereof or are inclined to the unlocking position, An opening hole 36a formed to be wider than the lateral width of the third locking member 38c and a stepped surface 36b formed so that the rear end of the third locking member 38c extends over the rear end of the opening hole 36a .

The first locking member 38a and the second locking member 38b are made of a metallic material having an elliptical shape and the third locking member 38c is made of a cylindrical metal material.

The first locking member 38a is formed to have a larger diameter than the second locking member 38b so that the inner holder 32 of the anvil 34 in the opening hole 36a of the accommodation space portion 36, And the second locking member 38b is installed so as to face toward the locking sleeve 42 in the opening hole 36a of the accommodation space portion 36 and the third locking member 38c Is provided so as to face the second locking member (38b) in the axial direction while covering the stepped surface (36b) in the opening hole (36a) of the accommodation space part (36).

The locking sleeve 42 includes an operating member 44 slidably fitted on the outer periphery of the anvil 34 and a sliding member 42 supported internally through the front end of the operating member 44 to slide along the outer periphery of the anvil 34 A support member 46 for pressing or pushing the first to third locking members 38a, 38b and 38c while being pressed against the outer periphery of the anvil 34; A first fixing ring 50 and a second fixing ring 52 which are disposed at a predetermined distance from the inside of the intermediate member to limit the forward and backward movement distances of the operation member 44, And a coil spring 54 provided between the ring 52 and applying an elastic force such that the operation member 44 and the support member 46 are moved backward to the unlocking position and then moved back to the locking position.

At this time, the support member 46 has an inclined surface 46a formed between the inner peripheral surface of the small diameter at the tip end and the inner peripheral surface of the large diameter at the rear end, and the boundary between the inclined surface 46a and the inner peripheral surface of the small- Portion is configured to abut the vertical center of the second locking member 40 when the locking sleeve 42 is moved to the locked position and stops.

The operation and effect of the locking structure of the power tool of the present invention constructed as described above will be described below.

3, when the driver bit 30 is inserted into the inner holder 32 of the anvil 34, the driver bit 30 is axially slid along the inner holder 32, and the inner holder 32 The first locking member 38a protrudes up and down vertically toward the inner holder 32. The first locking member 38a protrudes vertically toward the inner holder 32 when it reaches the intermediate distance of the first locking member 38a.

At this time, the first locking member 38a rolls toward the rear end of the opening hole 36a by the force of inserting the driver bit 30 as shown in Fig. 4 and the second locking member 38b to the rotation center point, The driver bit 30 is inserted deeply into the inner holder 32 of the anvil 34 without being interfered with by the first locking member 38 by pushing the locking member 38c toward the outer diameter of the anvil 34, Position.

In this state, when the locking groove 30a of the driver bit 30 coincides with the opening hole 36a of the accommodation space portion 36, the pushing force of the driver bit 30 acts on the first locking member 38 At this time, the first locking member 38a is returned to its original position by the elastic force of the ring spring 40 pressing the third locking member 38c, and the lower end of the first locking member 38a, as shown in FIG. 5, The locking bit 30 is locked in the locking groove 30a so that the driver bit 30 is completely removed from the inner holder 32 of the anvil 34. [

Accordingly, the first to third locking members 38a, 38b, 38c are formed to be different in shape and receiving position and size from each other so as to be vertically and horizontally movably received in the receiving space portion 36 of the anvil 34 Since the center of gravity is accommodated differently and is mechanically pressed to the locking position or pushed out to the unlocking position, the locking sleeve 42 ) To the unlocking position in advance.

That is, when the first to third locking members 38a, 38b, 38c are moved to the unlocking position by the force of inserting the driver bit 30 into the inner holder 32 of the anvil 34, The operation steps of moving the locking sleeve 42 to the unlocking position in advance so as to mount the driver bit 30 to the inner holder 32 of the anvil 34 are omitted It is possible to increase the convenience of use and eliminate the possibility of breakage caused by forcible collision of the driver bit 30 with the first locking member 38a, thereby prolonging the service life of the power tool.

On the other hand, in order to separate the driver bit 30 from the inner holder 32 of the anvil 34, first, the locking sleeve 42 is slid to the unlocking position so that the first to third locking members 38a, 38b ).

That is, when the operation member 44 is moved to the front of the anvil 34, the support member 46 coupled with the operation member 44 is simultaneously moved, and the inner peripheral surface of the small- The first to third locking members 38a and 38b and 38c are moved from the inner holder 32 of the anvil 34 to the driver bit 30 because the pressing force is released as shown in FIG. The first locking member 38a is displaced by the difference in height between the locking groove 30a of the driver bit 30 and the first locking member 38a when the second locking member 38b is pulled out, The locking bit 38 is pushed to the inner peripheral surface of the large diameter of the supporting member 46 together with the locking member 38c to separate the driver bit 30.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. You must see.

30: Driver bit 30a: Locking groove
32: inner holder 34: anvil
36: accommodating space part 36a: opening hole
36b: step surface 38a: first locking member
38b: second locking member 38c: third locking member
40: ring spring 42: locking sleeve
44: operating member 46: supporting member
46a: inclined surface 50: first fixing ring
52: second retaining ring 54: coil spring

Claims (4)

An anvil 34 in which an inner holder 32 is formed so that a driver bit 30 having a locking groove 30a is inserted or removed and an anvil 34 formed on an upper portion and a lower portion of a circumferential side of the anvil 34, And a locking sleeve (42) provided on the outer circumferential surface of the anvil (34) and moved to a locking position or an unlocking position along an axial direction, The locking structure comprising:
The accommodating space portion 36 is provided with a locking recess 30 which is aligned in a locking position to press the driver bit 30 inserted in the inner holder 32 or is locked so that it is pushed when the driver bit 30 is inserted into and detached from the inner holder 32. [ The first to third locking members 38a, 38b, 38c,
The first and second locking members 38a and 38b are vertically stacked on the one side of the accommodation space 36 so as to be vertically stacked in the locked position or are inclined to the unlocked position. And a stepped surface 36b is formed at the rear upper end of the opening hole 36a so as to cover the rear end of the third locking member 38c,
The first locking member 38a is formed in the shape of a circle having a diameter larger than that of the second locking member 38b so as to be directed toward the inner holder 32 in the opening hole 36a, The third locking member 38c is formed in a cylindrical shape so as to extend in the opening hole 36a so as to face the stepped surface 42a in the opening hole 36a. 36b and axially opposite the second locking member 38b,
Wherein a ring spring (40) is wound around an outer circumferential surface of the anvil (34) to apply elastic force so that the third locking member (38c) is pressed to a locking position. delete delete delete
KR1020150129119A 2015-09-11 2015-09-11 locking structure of electric powered tool KR101636689B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150129119A KR101636689B1 (en) 2015-09-11 2015-09-11 locking structure of electric powered tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150129119A KR101636689B1 (en) 2015-09-11 2015-09-11 locking structure of electric powered tool

Publications (1)

Publication Number Publication Date
KR101636689B1 true KR101636689B1 (en) 2016-07-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019170332A1 (en) * 2018-03-08 2019-09-12 Robert Bosch Gmbh Hand-held power tool
KR20230112839A (en) * 2022-01-21 2023-07-28 주식회사 아임삭 Power tool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006198755A (en) * 2005-01-24 2006-08-03 Makita Corp Working tool
JP2011230208A (en) * 2010-04-26 2011-11-17 Makita Corp Bit installing unit of screw-fastening tool
KR20140078699A (en) * 2011-10-24 2014-06-25 로베르트 보쉬 게엠베하 Portable power tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006198755A (en) * 2005-01-24 2006-08-03 Makita Corp Working tool
JP2011230208A (en) * 2010-04-26 2011-11-17 Makita Corp Bit installing unit of screw-fastening tool
KR20140078699A (en) * 2011-10-24 2014-06-25 로베르트 보쉬 게엠베하 Portable power tool

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019170332A1 (en) * 2018-03-08 2019-09-12 Robert Bosch Gmbh Hand-held power tool
KR20200130342A (en) * 2018-03-08 2020-11-18 로베르트 보쉬 게엠베하 Portable power tools
KR102654990B1 (en) * 2018-03-08 2024-04-08 로베르트 보쉬 게엠베하 portable power tools
KR20230112839A (en) * 2022-01-21 2023-07-28 주식회사 아임삭 Power tool
KR102663728B1 (en) 2022-01-21 2024-05-09 주식회사 아임삭 Power tool

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