TWI764321B - Twisting machine head replacement structure - Google Patents

Abstract

A structure for replacing the head of a twist-breaker, comprising: a main body with an inner sleeve part at the front end, a ring groove in the outer peripheral ring of the inner sleeve part and a first group connection part at the front end, a chuck unit, The rear end face of the chuck unit is provided with a second assembly part, which is assembled with the first assembly part; A blocking member is arranged inside, and the front end face of the central sleeve portion is protruded inwardly with a blocking portion, and the blocking portion can block the first assembly portion and the second assembly portion. When the blocking portion blocks the When the first assembly part and the second assembly part are connected, the position of the through hole is almost coincident with the annular groove of the inner sleeve part, so that the locking piece can be arranged between the annular groove and the through hole; an outer sleeve A part, which is slidably arranged outside the central sleeve part, can selectively restrict the movement of the locking piece to the outside.

Description

Twisting machine head replacement structure

The present invention relates to a power tool, in particular to a head replacement structure for a twist-breaker with a head that can be quickly replaced.

When bolting, in order to remove the excess tail, a twist-breaker is used to tighten the nut and twist the tail. Because the bolts are locked in different positions, the required strength is also different. Bolts of different sizes can be used with different sizes of chucks. Please refer to FIG. 1 to provide a conventional twist-and-breaker 10, which mainly includes a main body 11 and a chuck. 12 and a cover part 13, the front end of the main body 11 is provided with a drive part 111, the chuck 12 is assembled in the drive part 111, and can be rotated by the drive part 111; the cover part 13 is The hollow can be used for the collet 12 to pass through. In order to fix the position of the collet 12, two screw fixing elements 131 are provided at the end of the outer casing 13, which are screwed on the main body 11. When the collet 12 is to be replaced, A tool can be used to remove the screw-fastening element 131 on the outer casing 13 , so that the outer casing 13 can be separated from the host 11 , and the chuck 12 can be taken out from the host 11 .

However, in the conventional twist-breaker, when the outer casing 13 is to be disassembled, it is necessary to use a tool to loosen the screwing element 131. After the collet 12 is replaced, the screwing element 131 of the outer casing 13 is re-screwed. , so that the cover part 13 can be fixed on the main body 11, the replacement action takes a lot of time, and if there is no tool to carry, it is relatively troublesome to replace the cover part 131. In addition, the screw If the fixing element 131 is not screwed, or falls off, the problem of parts falling off or damage is likely to occur during operation.

The main purpose of the present invention is to provide a twist-breaker structure that can quickly replace the head.

Another object of the present invention is to eliminate the need for tools when the head of the twist-breaker is replaced.

In order to achieve the above-mentioned purpose, the present invention provides a head replacement structure for a twist-breaker, comprising: a main body, the front end of which is provided with an inner sleeve part, the outer circumferential ring of the inner sleeve part is provided with a ring groove, and the front end surface of which is provided with a first assembly part; a collet unit with an outer collet; the rear end face of the outer collet is provided with a second assembly part, and the second assembly part is assembled with the first assembly part; A central sleeve part is sleeved outside the inner sleeve part, at least a through hole is formed through the wall surface of the central sleeve part and the inner sleeve part, and a locking piece is arranged in the through hole, the locking piece will Partially exposed to the through hole, a blocking portion is protruded inwardly on the front end face of the central sleeve portion, and the blocking portion can block the first assembly portion and the second assembly portion. When the blocking portion blocks the first assembly portion When the first assembly part and the second assembly part are connected, the position of the through hole is almost coincident with the annular groove of the inner sleeve part, so that the locking member can be arranged between the annular groove and the through hole; A cover part is slidably arranged outside the central cover part, the inner side wall of the cover part has a stop part on the front side and an open part on the rear side; the diameter of the open part is larger than the stop part.

The present invention provides a structure for replacing the head of a twist-breaker, wherein the collet unit can be clamped by the central sleeve part, fixed in combination with the inner sleeve part of the main body, and can be operated to replace the collet unit Only need to push the outer sleeve part, the locking piece in the central sleeve part can move freely, and can be replaced, the replacement is simple, and no tools are needed, which can increase the efficiency and convenience of replacement.

Referring to FIGS. 2 to 4 , the preferred embodiment provides a twist-breaker 20 , which includes:

A main body 30 is provided with an inner sleeve portion 31 and an exit portion 32 at its front end. The exit portion 32 is disposed inside the inner sleeve portion 31 and is coaxially disposed with the inner sleeve portion 31 ; the inner sleeve portion 31 has an outer ring A ring groove 311 is formed on the peripheral ring; a first assembly part 312 is formed on the front end surface of the inner sleeve part 31 ; Four first grooves 314; the main body 30 can respectively drive the inner sleeve part 31 and the exit part 32 for driving. This driving method is a conventional one and will not be repeated here;

A collet unit 40 has an inner collet 41 and an outer collet 42; the inner collet 41 is connected with the exit portion 32, and the rear end surface of the outer collet 42 is provided with a second assembly portion 421, the The second assembling portion 421 is assembled with the first assembling portion 312 . The second assembling portion 421 is protruded radially outward from the end surface of the outer collet 42 with four second protrusions arranged at intervals. A block 422 and four second grooves 423, the first protrusions 313 are accommodated in the second grooves 423, the second protrusions 422 are accommodated in the first grooves 314, The assembling position of the first assembling portion 312 and the second assembling portion 421 is located at the front end face of the inner sleeve portion 31 and protrudes from the outer chuck 42; the inner chuck 41 is used for clamping There is a tail portion of a bolt (not shown in the figure), the outer collet 42 is used to hold a nut (not shown in the figure), and the main body 30 drives the collet unit 40 to perform a twist-breaking action. This twist-breaking action It is also a known technology and will not be repeated here;

A central sleeve portion 50 is sleeved on the outer side of the inner sleeve portion 31. Three through holes 51 are formed through the wall of the central sleeve portion 50. A locking piece 52 is respectively disposed in the through holes 51. The pieces 52 are formed of a sphere, and the diameter of the spheres is greater than the depth of the through holes 51, so that the locking pieces 52 are partially exposed at the top or bottom of the through holes 51, and the central sleeve The front end face of the portion 50 is provided with a blocking portion 53 protruding inwardly toward the axis. The assembling position of the assembling part 312 and the second assembling part 421 can be fixed by the blocking part 53 of the central sleeve part 50 , when the blocking part 53 blocks the first assembling part 312 and the second assembling part 421, the position of the through hole 51 is almost coincident with the annular groove 311 of the inner sleeve portion 31, so that the locking member 52 can be located between the annular groove 311 and the through hole 51; A first step portion 54 is recessed on the side of the front end outer ring;

A cover portion 60 is slidably disposed outside the central cover portion 50. The inner side wall surface of the cover portion 60 is provided with a stop portion 61 on the front side and an open portion 62 on the rear side. The diameter and width of the open portion 62 are larger than the In the stop portion 61, a concave-convex portion 63 is provided on the outer peripheral side of the outer sleeve portion 60. The concave-convex portion 63 is an embossed surface, which can increase the friction force; when the stop portion 61 of the outer sleeve portion 60 slides to the penetration When the hole 51 is at the position, the locking piece 52 will be pressed into the through hole 51 ; and when the open portion 62 slides to the position of the through hole 51 , the locking piece 52 can be exposed from the open portion 62 and the through hole 51 . The open space between the holes 51; the front end face of the outer sleeve part 60 is provided with a convex rib 64 relative to the stepped part 54 of the central sleeve part 50;

A positioning unit 70 includes a first positioning portion 71 , a second positioning portion 72 and a guiding positioning portion 73 ; the first positioning portion 71 and the second positioning portion 72 are located along the central sleeve portion 50 Axially spaced and arranged on the outer surface of the central sleeve portion 50 , which are respectively a ring groove 711 , 721 ; the guiding and positioning portion 73 can move with the position of the outer sleeve portion 60 , and the guiding and positioning portion 73 It is an elastic buckle 731 and a ring groove 732. The ring groove 732 is arranged at the position of the stop portion 61 for the elastic buckle 731 to be accommodated. It can also be a C-shaped buckle or other structures that can form positioning, which is not limited; The elastic buckle 731 of the guiding and positioning portion 73 can be disposed on the first positioning portion 71 or the second positioning portion 72, so that the central sleeve portion 50 and the outer sleeve portion 60 cannot be separated; when the guiding and positioning portion 73 When located at the first positioning portion 71 , the through hole 51 of the central sleeve portion 50 corresponds to the stopping portion 61 of the outer sleeve portion 60 ; when the guiding positioning portion 73 is located at the second positioning portion 72 , the center The through hole 51 of the sleeve part 50 corresponds to the open part 62 of the outer sleeve part 60 .

Referring to FIG. 4 , when the chuck unit 40 is fixed on the main body 30 , the elastic buckle 731 of the guiding and positioning portion 73 is located in the annular groove 711 of the first positioning portion 71 , and the outer portion of the outer portion 60 is located in the annular groove 711 of the first positioning portion 71 . The stopping portion 61 is located outside the through hole 51 of the central sleeve portion 50 , and the stopping portion 61 presses against the locking member 52 , so that the locking member 52 moves toward the inner sleeve portion 31 and is located at the Between the annular groove 311 and the through hole 51 , the positions of the central sleeve portion 50 and the inner sleeve portion 31 are fixed, and the blocking portion 53 on the front end side of the central sleeve portion 50 is locked against the first set of The connecting portion 312 and the second assembling portion 421 are outside, so that the first assembling portion 312 and the second assembling portion 421 will not be separated, that is, the outer collet 42 of the collet unit can be fixed on the On the inner sleeve portion 31 of the main body 30 ; in addition, the protruding ribs 64 of the outer sleeve portion also snap against the outer side of the stepped portion 54 of the central sleeve portion 50 .

Please refer to FIG. 5 , when it is necessary to change the size, the user can hold the concave-convex portion 63 of the outer jacket portion 60 to pull and apply force, because the concave-convex portion 63 has an embossed surface that can increase friction and facilitate gripping When the outer sleeve portion 60 is pushed forward, the elastic buckle 731 of the guiding and positioning portion 73 will move from the sliding groove 711 of the first positioning portion 71 to the sliding groove 721 of the second positioning portion 72, At this time, the portion of the outer sleeve portion 60 located outside the through hole 51 of the central sleeve portion 50 will be converted from the blocking portion 61 into an open portion 62 , so that the locking piece 52 in the through hole 51 can protrude out of the open portion 62 . and the locking member 52 will not lock the annular groove 311 of the inner sleeve portion 31, so that the central sleeve portion 50 can slide on the inner sleeve portion 31, and then, the central sleeve portion 50 and After the outer sleeve portion 60 is pushed forward, the central sleeve portion 50 is separated from the inner sleeve portion 31 ; the first assembly portion 312 and the second assembly portion 421 can be disengaged, and the chuck unit 40 can be automatically The body 30 is disengaged, and the collet unit 40 of different sizes can be replaced.

Please refer to FIG. 7 , when the chuck unit 40 is replaced, the second protrusion 422 and the second groove 423 of the second assembling portion 421 are aligned with the first concave of the first assembling portion 312 respectively. The groove 314 and the first bump 313 allow the second assembly portion 421 to be assembled on the first assembly portion 312. Next, please follow the directions shown in Fig. 6, Fig. 5 and Fig. The central sleeve part 50 and the outer sleeve part 60 are inserted from the front end of the chuck unit 40 , the through hole 51 of the central sleeve part 50 can be overlapped with the annular groove 311 of the inner sleeve part 31 , and the front end of the central sleeve part 50 The blocking portion 53 of the first assembling portion 312 and the second assembling portion 421 will be locked against the first assembling portion 312 and the second assembling portion 421 . Then, the outer sleeve portion 60 is pushed toward the direction of the main body 30 , so that the blocking portion 61 can move to the through hole 51 On the outside, the locking piece 52 can be pushed between the through hole 51 of the central sleeve portion 50 and the annular groove 311 of the inner sleeve portion 31 to form a snap fit. The position of the collet unit 40 will be fixed, and the assembly of the collet unit 40 will be completed; and the elastic buckle 731 of the guiding and positioning part 73 on the outer casing part 60 will be positioned in the ring groove 711 of the first positioning part 71, and the convex The rib 64 snaps against the outer side of the stepped portion 54 to form a positioner.

In the replacement structure of the twisting machine head provided by the present invention, the central sleeve part can be inserted into the inner sleeve part by changing the position of the outer sleeve part, and the inner sleeve part and the chuck unit are fixed. ; Compared with the conventional twist-breaker, the chuck needs to be replaced with a tool when changing, and it is not easy to fix; the twist-breaker head replacement structure of the present invention is simple to operate, and does not require tools, and can be performed quickly and instantly replace.

The above-mentioned embodiments are only intended to illustrate the technical means of the present invention and not to limit it, and all equivalent modifications of the present invention should be regarded as the protection scope of the present invention. The power tool of the present invention is the first structure in this field, and has the enhancement of practical effect, and the application is filed in accordance with the law.

10 Twist and break machine 11 Host machine 111 Drive part 12 Collet 13 Coat part 131 Screw element 20 Twisting machine 30 Body 31 Inner sleeve 311 Ring groove 312 The first set of connecting parts 313 The first bump 314 The first groove 32 Exit Department 40 Collet unit 41 Inner collet 42 Outer collet 421 The second set of connecting parts 422 The second bump 423 The second groove 50 Central sleeve 51 Through hole 52 Locking piece 53 Blocks 54 Steps 60 Coat part 61 Stop part 62 Open part 63 Concave and convex part 64 Convex rib 70 Positioning unit 71 First positioning part 711 Ring groove 72 Second positioning part 721 Ring groove 73 Guide positioning part 731 Elastic buckle 732 Ring groove

In order to enable your examiners to further understand the purpose, features and effects of the present invention, a preferred embodiment is given below and described in detail with the drawings, wherein: FIG. 1 is an exploded perspective view of a conventional twist-breaker. FIG. 2 is a three-dimensional external view of a preferred embodiment of the present invention. 3 is an exploded perspective view of a preferred embodiment of the present invention. FIG. 4 is a sectional view of the fixed state along the line 4-4 in FIG. 2 . FIG. 5 is a sectional view of the pushing state at the same position as shown in FIG. 4 . FIG. 6 is a sectional view of the unlocked state at the same position in FIG. 4 . FIG. 7 is a three-dimensional external view of the assembly of the inner sleeve portion and the chuck unit according to the preferred embodiment of the present invention.

20 Twisting machine 30 Body 31 Inner sleeve 311 Ring groove 312 The first set of joints 313 The first bump 314 The first groove 32 Exit Department 40 Collet unit 41 Inner collet 42 Outer collet 421 The second set of connecting parts 422 The second bump 423 The second groove

50: Central sleeve

51: Through hole

52: Stopper

53: Stopper

54: Steps

60: Coat Department

61: Stop part

62: Open Department

63: Concave and convex part

64: Ribs

71: The first positioning part

72: Second positioning part

73: Guide positioning part

732: Ring groove

Claims (9)

A structure for replacing the head of a twist-breaker, comprising: a main body, the front end of which is provided with an inner sleeve part, the outer circumferential ring of the inner sleeve part is provided with a ring groove, and the front end surface of which is provided with a first assembly part; a collet unit, which has an outer collet, and a second assembly part is arranged on its rear end; the second assembly part is assembled with the first assembly part; A central sleeve part is sleeved on the outside of the inner sleeve part, the wall surface of the central sleeve part is provided with at least a through hole, and each through hole is respectively provided with a locking piece, and each locking piece is partially exposed in the Each of the through holes has a blocking portion protruding inward on the front end face of the central sleeve portion. The blocking portion can block the first assembly portion and the second assembly portion. When the blocking portion blocks the first assembly When the connecting portion is connected to the second assembly portion, the position of the through hole is almost coincident with the annular groove of the inner sleeve portion, so that the locking member can be arranged between the annular groove and the through hole; A cover part is slidably arranged outside the central cover part, the inner side wall of the cover part has a stop part on the front side and an open part on the rear side; the diameter of the open part is larger than the stop part. The replacement structure of the twist-breaker head according to claim 1, wherein a protruding rib is protruded inwardly on the front end face of the outer sleeve portion, and the protruding rib stops at the front end face of the central sleeve portion. The replacement structure of the twist-breaker head according to claim 2, wherein: the outer side of the front end surface of the central sleeve portion is provided with a stepped portion relative to the protruding rib, and the protruding rib is clamped outside the stepped portion. The replacement structure of the twist-breaker head according to claim 1, wherein: a positioning unit is arranged between the central sleeve part and the outer sleeve part, and the positioning unit includes a first positioning part, a second positioning part and a guide a guiding and positioning part; the first positioning part and the second positioning part are arranged at intervals along the axial direction of the central sleeve part, and the guiding and positioning part can be arranged on the first positioning part or on the second positioning part; when the guiding and positioning part is located at the first positioning part, the through hole of the central sleeve part corresponds to the stop part of the outer sleeve part; when the guiding and positioning part is located at the second positioning part , the through hole of the central sleeve part corresponds to the open part of the outer sleeve part. The replacement structure of the twist-breaker head according to claim 4, wherein: the first positioning part and the second positioning part are respectively a ring groove, and the guiding and positioning part is an elastic buckle. The replacement structure of the twist-breaker head according to claim 1, wherein: the first assembly part of the main body comprises a number of first protrusions and first grooves arranged at intervals; The second assembly part includes a number of second bumps and a second groove arranged at intervals; the first bumps are accommodated in the second groove, and the second bumps are accommodated in the first in a groove. The replacement structure of the twist-breaker head according to claim 6, wherein: the second projection on the outer chuck of the chuck unit is radially outwardly protruded from the rear end face of the outer chuck, so that the inner part of the body After the first groove of the sleeve portion is assembled with the second protruding block, the second protruding block is located on the front end face of the inner sleeve portion and can be blocked by the blocking portion of the central sleeve portion. The replacement structure of the twist-breaker head according to claim 1, wherein: the outer sleeve portion is provided with a concave-convex portion. The head replacement structure for a twist-breaker according to claim 1, wherein: each of the locking parts is formed of a sphere, and the diameter of each sphere is greater than the depth of each of the through holes.

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