TWM553254U - Front cover for rotary tool - Google Patents

Description

Rotating tool with front cover

This creation is about a front cover for a turning tool.

According to the general rotary tool (such as a pneumatic or electric drill) on the market, a front cover with a body and a working end of the fuselage is provided, and a rotating shaft is extended on the working end, wherein the front cover has a front cover body And a bushing, the front cover system is disposed at the working end, and the bushing is sleeved in the front cover body, and the driving shaft is threaded out by the bushing so that the bushing is located on the driving shaft and the front cover body Between the two, to prevent the drive shaft from causing wear between the front cover body during operation, thereby using the drive shaft to lock or loosen the screw.

However, since the bushing of the conventional front cover is movably fitted to the front cover body and is not fixed, when the rotating tool is actuated to generate strong vibration, it is easy to loosen between the front cover body and the bushing, resulting in front The cover body and the bushing rotate with each other to cause wear damage. In a more serious case, the drive shaft and the bushing may be improperly collided and jammed, and there is a defect that needs to be improved.

Therefore, it is necessary to provide a novel and progressive front cover for a rotary tool to solve the above problems.

The main purpose of the present invention is to provide a front cover for a rotating tool, which can fix the bushing to the cover body without rotating relative to the cover body, so as to avoid damage caused by improper collision between the bushing and the cover body.

In order to achieve the above object, the present invention provides a front cover for a rotary tool, which is provided on a rotary tool, the rotary tool has a working end, the working end extends with a rotating shaft, and the rotating tool includes a cover for the front cover And a bushing. The cover is provided on the working end, and a cover is disposed transversely from one end of the working end, and the cover is provided with a through hole. The bushing includes a ring portion and a convex portion, and the convex portion is inserted into the through hole, and the ring portion is provided with a concave-convex structure facing one side of the cover plate, and the concave-convex structure is abutted toward the cover plate The pressing is forced to be tight, and the rotating shaft is passed through the convex portion.

The structural features of the present invention and the intended effects thereof will be described below by way of a preferred embodiment, but are not intended to limit the scope of the present invention.

Referring to FIGS. 1 to 4, there is shown a preferred embodiment of the present invention. The rotary tool of the present invention is provided with a front cover for a rotary tool 9, and the rotary tool 9 has a working end 91, and the working end 91 is extended. There is a rotating shaft 92, and the rotating tool 9 includes a cover 1 and a bushing 2 by the front cover.

The cover body 1 is disposed on the working end 91. The cover body 1 is disposed at a side of the working end 91. The cover plate 11 is provided with a through hole 12 .

The lining 2 includes a ring portion 21 and a convex portion 22, and the convex portion 22 is inserted into the through hole 12, and a concave-convex structure 23 is disposed on a side surface of the ring portion 21 facing the cover plate 11. The structure 23 is pressed against the cover plate 11 to be pressed tightly, and the rotating shaft 92 is disposed through the convex portion 22. In the embodiment, the convex portion 22 is surrounded by the inner circumference of the ring portion 21 The ring portion 21 extends in the axial direction, and the convex portion 22 is formed in a cylindrical shape. Preferably, the hardness of the bushing 2 is greater than the hardness of the cover body 1 so that the concave-convex structure 23 can smoothly press the cover plate 11 to deform the cover plate 11 , and the concave-convex structure 23 can be embedded and Pressing the cover plate 11 to prevent the ring portion 21 from being disengaged from the cover plate 11 to disengage the convex portion 22 from the through hole 12, the bushing 2 does not rotate with the cover plate 11, and the bushing 2 The hardness is greater than the hardness of the cover 1 to prevent the convex portion 22 from being worn when the rotating shaft 92 rotates.

Specifically, the cover body 1 includes a body portion 13 having one end portion of the body portion 13 and a lip portion 14 laterally facing the peripheral portion. The lip portion 14 is locked to the working end 91. In the present embodiment, the lip 14 is locked to the working end 91 by a plurality of fasteners.

Further, it is preferable that the uneven structure 23 includes a plurality of teeth 231 which are pressed and fitted into the cover plate 11. In this embodiment, the inclination of the two side walls of the tooth portion 231 is the same, and in the embodiment, the tooth portions 231 are annularly arranged on the side surface of the cover plate 11 , and the concave and convex structure 23 is embedded. The ring portion 21 can be firmly attached to the cover plate 11 and can not be rotated relative to the cover plate 11. In other embodiments, the ring portion 21 of the bushing 2A is provided with the concave-convex structure 23A. There is also a plurality of spacers 24 (shown in FIG. 5) interposed between the teeth 231 on the side.

With further reference to FIG. 6, in another embodiment of the present invention, the concave-convex structure 23B of the bushing 2B includes a plurality of first ratchet teeth 232 and a plurality of second ratchet teeth 233, the first ratchet teeth 232 are clockwise Tilt, the second ratchets 233 are inclined in a clockwise direction. Specifically, the side surface of the ring portion 21 of the cover plate 11 defines a first block 211 and a second block 212. The first ratchet teeth 232 are disposed in the first block 211. Two ratchet teeth 233 are disposed in the second block 212. Thereby, the first ratchets 232 can effectively prevent the ring portion 21 from rotating in the clockwise direction relative to the cover plate 11, and the second ratchet teeth 233 can effectively prevent the ring portion 21 from being along the cover plate 11 Turning counterclockwise, the rest of the structure is the same as that of the above embodiment, so it will not be described any more.

In summary, the present rotating tool uses a front cover, which can smoothly press the cover plate to deform the cover plate, and the concave-convex structure can embed and press the cover plate to prevent the ring portion from being detached from the cover. The cover plate disengages the convex portion from the perforation, and the bushing does not rotate with the cover plate, and the hardness of the bushing is greater than the hardness of the cover body to prevent the convex portion from being worn when the rotating shaft rotates.

1‧‧‧ cover
2,2A,2B‧‧‧ bushing
9‧‧‧Rotating tools
11‧‧‧ Cover
12‧‧‧Perforation
13‧‧‧ Body
14‧‧‧Lip
21‧‧‧ Ring Department
22‧‧‧ convex
23,23A, 23B‧‧‧ concave structure
24‧‧‧Interval
231‧‧‧ teeth
232‧‧‧First ratchet
233‧‧‧Second ratchet
211‧‧‧ first block
212‧‧‧Second block
91‧‧‧Working end
92‧‧‧Rotary axis

1 is a perspective view of a preferred embodiment of the present invention. 2 is an exploded view of a preferred embodiment of the present invention. 3 is a side cross-sectional view of a preferred embodiment of the present invention. 4 is a perspective, cross-sectional view of a preferred embodiment of the present invention. Figure 5 is a partial perspective view of another preferred embodiment of the present invention. Figure 6 is a partial perspective view of another preferred embodiment of the present invention.

1‧‧‧ cover

2‧‧‧ bushing

9‧‧‧Rotating tools

11‧‧‧ Cover

13‧‧‧ Body

21‧‧‧ Ring Department

22‧‧‧ convex

23‧‧‧ concave structure

91‧‧‧Working end

92‧‧‧Rotary axis

Claims (11)

A rotating tool for a rotating cover is provided on a rotating tool, the rotating tool has a working end, and the working end extends with a rotating shaft, comprising: a cover body for covering the working end, the cover body is away from the a cover plate is disposed at one end of the working end, and the cover plate is provided with a through hole; a bushing includes a ring portion and a convex portion connected to the through hole, the convex portion is inserted into the through hole, and the ring portion faces the cover plate One of the side faces is provided with a concave-convex structure which is pressed against the top of the cover plate to be pressed tightly, and the rotating shaft is passed through the convex portion. The front cover for a rotary tool according to claim 1, wherein the cover body comprises a body portion, the cover portion is provided with the cover plate at one end, and the other end has a lip laterally facing the peripheral portion, the lip portion is locked to the cover portion Work side. The front cover for a rotary tool according to claim 1, wherein the convex portion extends from an inner circumference of the ring portion in an axial direction of the ring portion, and the convex portion is formed in a cylindrical shape. The front cover for a rotary tool according to claim 1, wherein the uneven structure includes a plurality of teeth that are pressed and fitted into the cover. The front cover of the rotary tool according to claim 4, wherein the inclination of the two side walls of each of the tooth portions is the same. The front cover for a rotary tool according to claim 4, wherein the teeth are annularly arranged on the side of the cover. The front cover for a rotary tool according to claim 4, wherein the side of the ring portion provided with the concave-convex structure is further provided with a plurality of spacers between the teeth. The front cover for a rotary tool according to claim 4, wherein the concave-convex structure comprises a plurality of first ratchets and a plurality of second ratchets, the first ratchets are inclined in a clockwise direction, and the second ratchets Tilt in a clockwise direction. The front cover of the rotary tool according to claim 8, wherein the side surface of the ring portion defines a first block and a second block, and the first ratchet is disposed in the first block. The second ratchets are disposed in the second block. The front cover of the rotary tool according to claim 1, wherein the hardness of the bush is greater than the hardness of the cover. The front cover for a rotary tool according to claim 2, wherein the convex portion extends from an inner circumference of the ring portion along an axial direction of the ring portion, the convex portion is formed into a cylindrical shape; and the concave-convex structure includes a plurality of teeth portions. The teeth are pressed and embedded in the cover plate; the inclination of the two side walls of each of the tooth portions is the same; the teeth are annularly arranged on one side of the cover plate; The side surface of the concave-convex structure is further provided with a plurality of spacers between the teeth; the concave-convex structure includes a plurality of first ratchets and a plurality of second ratchets, the first ratchets are inclined in a clockwise direction, The second ratchets are inclined in a clockwise direction; the sides of the ring face of the cover plate define a first block and a second block, and the first ratchets are disposed in the first block, The second ratchets are disposed on the second block; the hardness of the bushing is greater than the hardness of the cover.