TWI783835B - Constant torque tool - Google Patents

Abstract

A constant torque tool is provided, including: a screwdriver body, including a handle and a working rod connected to the handle, at least one of the handle and the working rod being integrally formed with a first blocking portion; and a sleeve member, rotatably disposed around the screwdriver body, integrally formed with a second blocking portion, the second blocking portion being releasably blocked with the first blocking portion in a rotation direction of the sleeve member; wherein when there is a torque greater than a predetermined torque between the sleeve member and the screwdriver body, at least one of the second block portion and the first block portion is deformed so that the second blocking portion slides on and over the first blocking portion in the rotation direction.

Description

constant torque tool

The invention relates to a constant torque tool.

Generally, when screwing a fastener etc. to an object, a tool with a handle and a screwdriver head is used for the operation. The user holds the handle and inserts the screwdriver head into the fastener for easy rotation. fastener.

In the locking operation, if the torque used is not large enough, the fasteners such as screws may be loosened, which not only causes danger, but also affects its working quality; if the torque is too large, the screws or screw holes may be scratched and broken If it is damaged, it will also lose the locking effect of the screw.

However, the conventional screwdriver tool does not have any torque control mechanism, which easily causes excessive torque and damages the fastener.

Therefore, it is necessary to provide a novel and progressive constant torque tool to solve the above-mentioned problems.

The main purpose of the present invention is to provide a constant torque tool that can avoid damage to the driven workpiece due to excessive force.

In order to achieve the above object, the present invention provides a constant torque tool, comprising: a sub body, including a handle and a working rod connected to the handle, at least one of the handle and the working rod is integrally formed with a first a blocking structure; and a kit, which is rotatably sleeved on the screwdriver body, and a second blocking structure is integrally formed, and the second blocking structure can be aligned with the first blocking structure in one rotation direction of the kit The locking can be jumped off; wherein, when there is a torque greater than a predetermined torque between the sleeve and the screwdriver body, at least one of the second locking structure and the first locking structure is deformed The second locking structure slides against the first locking structure in the rotation direction.

1: Constant torque tool

10: screwdriver body

11: handle

111: The first blocking structure

112: first end

113: convex part

114: Flange

12: Working bar

121: screwdriver head

20: Suite

21: The second blocking structure

211: convex part

212: arc convex

22: sleeve body

221: Zhoubi

222: top wall

23: spring arm

231: Connection section

24: Grooving

25: ring groove

26: Groove

27: concave-convex structure

30: end cap

Fig. 1 is a perspective view of a preferred embodiment of the present invention.

Fig. 2 is an exploded view of a preferred embodiment of the present invention.

Fig. 3 is an exploded view from another perspective of a preferred embodiment of the present invention.

Fig. 4 is a sectional view of a preferred embodiment of the present invention.

FIG. 5 is a partially enlarged view of FIG. 4 .

The following examples illustrate possible implementations of the present invention, but are not intended to limit the scope of protection of the present invention.

Please refer to FIGS. 1 to 5 , which show a preferred embodiment of the present invention. The constant torque tool 1 of the present invention includes a sub-body 10 and a set 20 .

The screwdriver body 10 includes a handle 11 and a working rod 12 connected to the handle 11 , at least one of the handle 11 and the working rod 12 is integrally formed with a first locking structure 111 . The set 20 is rotatably sleeved on the screwdriver body 10, and the set 20 is integrally formed with a second locking structure 21, and the second locking structure 21 can be locked with the first locking structure in one rotation direction of the set 20. The structure 111 can be locked in a jumping manner; wherein, when there is a torque greater than a predetermined torque between the sleeve 20 and the screwdriver body 10, the second locking structure 21 and the first locking structure 111 At least one of them is deformed so that the second locking structure 21 slides over the first locking structure 111 in the rotation direction. In this way, excessive force can be avoided to damage the driven workpiece (such as screws or other fasteners).

In this embodiment, the handle 11 is integrally formed with the plastic parts of the first locking structure 111, and the kit 20 is integrally formed with plastic parts. These plastic parts can be made through injection molding, which is fast and convenient, and These plastic parts have a certain structural strength and deformability, and are suitable for forming a mechanism for torsion in place and jumping out. However, the handle 11 and the kit 20 can also be a combination of plastic material and metal material or other materials.

Specifically, the handle 11 includes a first end portion 112, the working rod 12 is connected to the first end portion 112, the sleeve 20 is rotatably sleeved on the first end portion 112, and the first end portion 112 is integrally formed with the first locking structure 111 , the second locking structure 21 includes at least one protrusion 211 , and the at least one protrusion 211 is integrally formed on an inner surface of the sleeve 20 . However, the first blocking structure 111 can be disposed on the working rod 12 .

Preferably, the first locking structure 111 includes a plurality of protrusions 113 , which can achieve multiple stages of stable torsion force in-position jumping-off effect. The plurality of protrusions 113 are distributed on the screwdriver body 10 at intervals in the circumferential direction, and the plurality of protrusions 113 extend along an axial direction of the screwdriver body 10 . In detail, the plurality of protrusions 113 are equiangularly distributed on the handle 11 at circumferential intervals and extend axially to an end surface of the handle 11, so as to prevent the second locking structure 21 of the sleeve 20 from interfering with the handle. 11 creates interference to benefit assembly.

In this embodiment, each of the protrusions 113 of the first locking structure 111 tapers radially outward; each of the protrusions 211 of the second locking structure 21 includes an arc toward the first locking structure 111 The convex arc convex surface 212, each of the arc convex surfaces 212 of the second locking structure 21 is locked between the adjacent convex portions 113 of the first locking structure 111; the convex portion 113 and the arc convex surface 212 are tapered Conducive to the smoothness and stability of escape.

Preferably, the sleeve 20 is integrally formed and includes a sleeve body 22 and at least one elastic arm 23 connected to the sleeve body 22 , and the at least one elastic arm 23 is provided with the second locking structure 21 . The sleeve 20 also includes a slot 24 extending along the elastic arm 23, the slot 24 extends on a peripheral wall 221 and a top wall 222 of the sleeve body 22; The thickness of the surrounding wall 221 and the connecting section 231 connecting the surrounding wall 221 are beneficial to the swing of the elastic arm 23 .

The handle 11 further includes a circumferentially extending flange 114, and the inner surface of the sleeve 20 is provided with a circumferentially extending annular groove 25, the flange 114 is movably accommodated in the annular groove 25, so that the sleeve 20 The ring groove 25 rotates. The inner surface of the casing 20 further includes a groove 26 , the groove 26 communicates with the annular groove 25 and opens on an end surface of the casing 20 .

In this embodiment, the working rod 12 is wrapped around the handle 11 and integrally formed with a head 121 (such as a cross, a word, hexagonal or other shapes), but the working rod can also be provided at one end. There is an insertion hole for removably receiving a plug.

Preferably, the set 20 further includes a plurality of concave-convex structures 27, and the multiple concave-convex structures 27 are distributed on the outer surface of the peripheral wall 221 at equiangular intervals in the circumferential direction, so as to facilitate grasping and applying force; the constant torque tool 1 further includes An end cap 30 is rotatably arranged at one end of the handle 11 opposite to the working rod 12 , so as to facilitate the palm to touch and quickly rotate the screwdriver body 10 or the set 20 with fingers.

1: Constant torque tool

10: screwdriver body

20: Suite

30: end cap

Claims (10)

A constant torque tool, comprising: a tool body, including a handle and a working rod connected to the handle, at least one of the handle and the working rod is integrally formed with a first locking structure; and a kit , rotatably sleeved on the screwdriver body, integrally formed with a second locking structure, the second locking structure can be locked with the first locking structure in one rotation direction of the kit; Wherein, when there is a torque greater than a predetermined torque between the sleeve and the screwdriver body, at least one of the second locking structure and the first locking structure is deformed so that the second locking structure is in the Sliding in the rotation direction passes over the first blocking structure. The constant torque tool according to claim 1, wherein the handle is integrally formed with a plastic part of the first locking structure. The constant torque tool according to claim 1, wherein the kit is an integrally formed plastic part. The constant torque tool according to claim 1, wherein the first blocking structure includes a plurality of protrusions, and the plurality of protrusions are distributed on the screwdriver body at intervals in the circumferential direction. The constant torque tool as claimed in claim 4, wherein the plurality of protrusions extend axially along one of the screwdriver bodies. The constant torque tool according to claim 1, wherein the second blocking structure includes at least one protrusion, and the at least one protrusion is integrally formed on an inner surface of the sleeve. The constant torque tool according to claim 6, wherein the kit is integrally formed and includes a casing and at least one elastic arm connected to the casing, and the at least one elastic arm is provided with the second locking structure. The constant torque tool as claimed in Claim 1 further includes an end cap, which is rotatably arranged at one end of the handle opposite to the working rod. The constant torque tool as described in claim 7, wherein the handle is an integrally formed plastic part; the kit is an integrally formed plastic part; the first locking structure includes a plurality of convex parts, and the first locking structure A plurality of protrusions are distributed on the handle at equiangular intervals in the circumferential direction; the plurality of protrusions of the first blocking structure extend along one axial direction of the screwdriver body to one end surface of the handle; the first blocking Each of the protrusions of the structure tapers radially outward; each of the protrusions of the second locking structure includes an arc convex surface that is convex toward the first locking structure, and each of the arc convex surfaces of the second locking structure Blocking between the adjacent protrusions of the first blocking structure; the handle also includes a circumferentially extending flange, and the inner surface of the sleeve is provided with a circumferentially extending ring groove, the flange can be moved Located in the ring groove; the kit also includes a slot extending along the elastic arm, the slot extending on a peripheral wall and a top wall of the sleeve body; the elastic arm includes a thickness thinner than the peripheral wall of the sleeve body and connect the connecting section of the peripheral wall; the sleeve further includes a plurality of concave-convex structures, which are distributed equiangularly on the outer surface of the peripheral wall at circumferential intervals; the inner surface of the sleeve further includes a groove, and the concave-convex structure The groove communicates with the ring groove and opens on one end surface of the sleeve. The constant torque tool as claimed in any one of claims 1 to 9, wherein the handle includes a first end, the working rod is connected to the first end, and the sleeve is rotatably sleeved on the first end. end portion, the first end portion is integrally formed with the first locking structure.

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