CN111267037A

CN111267037A - Pin pulling tool

Info

Publication number: CN111267037A
Application number: CN202010214576.3A
Authority: CN
Inventors: 丘浪锋; 陈标; 唐宇; 罗承熙
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2020-06-12

Abstract

The invention discloses a pin pulling tool, which comprises a pin pulling body, wherein the pin pulling body comprises a pulling rod, an impact hammer and two lever clamping arms; a clamping arm movable inner cavity is arranged in the pull pin body; a circular truncated cone is arranged at the upper end of the drawing rod; the circular truncated cones are distributed in the movable inner cavities of the clamping arms; the middle lower part of the drawing rod penetrates through the movable inner cavity of the clamping arm to be distributed, the impact hammer is movably distributed, and the lower end of the drawing rod is detachably combined with an impact baffle; the lower part of the lever clamping arm is provided with an inclined block corresponding to the circular truncated cone; the two lever clamping arms are correspondingly distributed in the clamping arm movable inner cavities through rotating shafts, are correspondingly distributed on two sides of the circular truncated cone and are distributed in a clamping state on the circular truncated cone; the upper part of the lever clamping arm is provided with a pin chuck which is distributed outside the movable inner cavity of the clamping arm. The invention has the advantages of strong engagement with the pin head, difficult slipping in the knocking process of the pin-pulling hammer, good use effect and the like.

Description

Pin pulling tool

Technical Field

The invention relates to the technical field of pin pulling, in particular to a pin pulling tool.

Background

The pin pulling tool has irreplaceable effects in maintenance operation, and is mainly based on the fact that some devices have sensitive areas, pins cannot be operated by tools such as a tilting tool and a pliers, otherwise, damage to some parts is easily caused, and on the basis of long time, corrosion and material aging phenomena sometimes occur on the pins and the heads of the pins.

The above background disclosure is only for the purpose of assisting understanding of the concept and technical solution of the present invention and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.

Disclosure of Invention

Aiming at the technical problems, the invention provides the pin pulling tool which can strongly engage the pin head, is not easy to slip in the knocking process of the pin pulling hammer and has good use effect.

In order to achieve the purpose, the invention adopts the following technical scheme:

a pin pulling tool comprises a pin pulling body, wherein the pin pulling body comprises a pulling rod, an impact hammer and two lever clamping arms; a clamping arm movable inner cavity is arranged in the pull pin body; a circular truncated cone is arranged at the upper end of the drawing rod; the circular truncated cones are distributed in the movable inner cavities of the clamping arms; the middle lower part of the drawing rod penetrates through the movable inner cavity of the clamping arm to be distributed, the impact hammer is movably distributed, and the lower end of the drawing rod is detachably combined with an impact baffle; the lower part of the lever clamping arm is provided with an inclined block corresponding to the circular truncated cone; the two lever clamping arms are correspondingly distributed in the clamping arm movable inner cavities through rotating shafts, are correspondingly distributed on two sides of the circular truncated cone and are distributed in a clamping state on the circular truncated cone; the upper part of the lever clamping arm is provided with a pin chuck which is distributed outside the movable inner cavity of the clamping arm.

Furthermore, an adjusting shaft hole is formed in the middle shaft of the circular truncated cone.

Furthermore, a screw rod is arranged above the corresponding adjusting shaft hole, and the diameter of the screw rod is smaller than that of the adjusting shaft hole; compression nuts are distributed on the screw; and the shells on the two sides of the movable inner cavity of the clamping arm are provided with nut tightening movable grooves corresponding to the compression nuts.

Furthermore, the inner side of the pin chuck is provided with clamping sawteeth.

Furthermore, the rotating shaft is arranged at the upper part of the lever clamping arm.

Furthermore, the middle lower part of the movable inner cavity of the clamping arm is provided with a drawing rod limiting hole, and the drawing rod penetrates through the drawing rod limiting hole and is distributed.

Compared with the prior art, the invention has the beneficial effects that:

(1) the invention can realize that the impact times of the impact hammer are more when the impact hammer is used, and the lever clamping arms distributed through the lever design can further obtain larger clamping force on the pin in each impact, thereby effectively preventing the slipping phenomenon.

(2) The screw rod subassembly that combination was equipped with can be when using, earlier right through the bolt on it the round platform pushes down spacingly, makes lever clamping arm carry out preliminary clamp to the pin, then loosens the hand again, only need reuse the jump bit striking can, excellent in use effect.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Detailed Description

As shown in fig. 1, a pin pulling tool comprises a pin pulling body, wherein the pin pulling body comprises a pulling rod 1, an impact hammer 2 and two lever clamping arms 10; a clamping arm movable inner cavity 4 is arranged in the pull pin body; the upper end of the drawing rod 1 is provided with a round table 12; the round tables 12 are distributed in the clamping arm movable inner cavity 4; the middle lower part of the clamping arm movable inner cavity 4 is provided with a drawing rod limiting hole 14, the middle lower part of the drawing rod 1 penetrates out of the drawing rod limiting hole 14, the clamping arm movable inner cavity is distributed, certainly, the drawing rod 1 is also movably distributed with the impact hammer 2, and the lower end of the drawing rod 1 is detachably combined with the impact baffle 3. The lower part of the lever clamping arm 10 is provided with an inclined block 5 corresponding to the circular truncated cone 12; the two lever clamping arms 10 are correspondingly distributed in the clamping arm movable inner cavity 4 through the rotating shaft 9, are correspondingly distributed on two sides of the circular truncated cone 12 and are distributed for clamping the circular truncated cone 12, so that the circular truncated cone 12 is prevented from falling off; the upper part of the lever clamping arm 10 is provided with a pin chuck 8 which is distributed outside the movable inner cavity 4 of the clamping arm so as to be beneficial to clamping the pin, and the inner side of the pin chuck 8 of the embodiment is provided with clamping sawteeth, which can be of other structures; the pivot 9 of this embodiment is established the upper portion of lever arm lock 10 realizes that pin chuck 8 one end support arm is short and small relatively to impel pin chuck 8 to the powerful clamp force of implementation of pin through lever principle, effectively reduce the slippage phenomenon. In this embodiment, an adjusting shaft hole 13 is formed in the center shaft of the circular truncated cone 12. A screw rod 11 is arranged above the adjusting shaft hole 13, the diameter of the screw rod 11 is smaller than that of the adjusting shaft hole 13, namely, after the lower part of the screw rod 11 is inserted into the adjusting shaft hole 13, the circular truncated cone 12 can move linearly up and down freely; the screw rod 11 is distributed with a compression nut 6; and the shells on the two sides of the clamping arm movable inner cavity 4 are provided with nut tightening movable grooves 7 corresponding to the compression nuts 6 so as to realize the rotation operation of the compression nuts 6 by a nut tightening tool.

When the device is used, the pin chuck 8 of the device is clamped to the head of a pin, then the compression nut 6 is rotated, the circular table 12 is pressed downwards, the circular table 12 is promoted to promote the pin chuck 8 to clamp the pin head through the lever principle, the compression nut 6 is tightened by a bolt tightening tool, the hand can be loosened, at the moment, the acting force of the whole device is completely acted on the pin head, then the impact hammer is grabbed by one hand and pulled downwards, the striking is carried out by utilizing the gravity of the impact hammer, in the striking process, the lever clamping arm can further obtain larger clamping force on the pin in each striking, the slipping phenomenon caused by impact vibration, impact force and the like is effectively prevented, namely, the clamping is tighter and firmer when the impact is carried out, and the using effect is good.

Claims

1. The utility model provides a pin pulling tool, includes the pin pulling body, its characterized in that: the pin pulling body comprises a pulling rod, an impact hammer and two lever clamping arms; a clamping arm movable inner cavity is arranged in the pull pin body; a circular truncated cone is arranged at the upper end of the drawing rod; the circular truncated cones are distributed in the movable inner cavities of the clamping arms; the middle lower part of the drawing rod penetrates through the movable inner cavity of the clamping arm to be distributed, the impact hammer is movably distributed, and the lower end of the drawing rod is detachably combined with an impact baffle; the lower part of the lever clamping arm is provided with an inclined block corresponding to the circular truncated cone; the two lever clamping arms are correspondingly distributed in the clamping arm movable inner cavities through rotating shafts, are correspondingly distributed on two sides of the circular truncated cone and are distributed in a clamping state on the circular truncated cone; the upper part of the lever clamping arm is provided with a pin chuck which is distributed outside the movable inner cavity of the clamping arm.

2. A pin pulling tool as defined in claim 1, wherein: an adjusting shaft hole is formed in the middle shaft of the circular truncated cone.

3. A pin pulling tool as defined in claim 2, wherein: a screw rod is arranged above the corresponding adjusting shaft hole, and the diameter of the screw rod is smaller than that of the adjusting shaft hole; compression nuts are distributed on the screw; and the shells on the two sides of the movable inner cavity of the clamping arm are provided with nut tightening movable grooves corresponding to the compression nuts.

4. A pin pulling tool as defined in claim 1, wherein: and clamping sawteeth are arranged on the inner side of the pin chuck.

5. A pin pulling tool as defined in claim 1, wherein: the rotating shaft is arranged at the upper part of the lever clamping arm.

6. A pin pulling tool as defined in claim 1, wherein: the middle lower part of the clamping arm movable inner cavity is provided with a drawing rod limiting hole, and the drawing rod penetrates through the drawing rod limiting hole and is distributed.