Special tool for disassembling pin

Abstract

The utility model provides a special tool for disassembling a pin. The technical problems that time and labor are wasted and potential safety hazards exist in existing pin disassembling are solved. The device comprises a main shaft, the main shaft is sequentially provided with a threaded piece, a counter-acting force mechanism, an impact piece and a first limiting piece from bottom to top, the impact piece movably sleeves the main shaft, the upper edge and the lower edge of the impact piece extend outwards to form bosses, and a rope is bound between the two bosses and used for pulling the impact piece to reciprocate on the main shaft; the counter-acting force mechanism comprises a second limiting piece, an elastic piece and a power transmission piece which are sequentially arranged from bottom to top, the second limiting piece is fixedly arranged on the main shaft, the main shaft is movably sleeved with the elastic piece and the power transmission piece, and the counter-acting force mechanism is used for bearing impact force brought by the impact piece and providing counter-acting force for the impact piece. The pin dismounting device can be widely applied to the technical field of pin dismounting.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of disassembling pins, and more particularly to a pin disassembling tool. BACKGROUND

[0002] In the tire production process, the temperature of the rubber material is often abnormal, the product is sticky, and the pin is worn out. At this time, it is necessary to rearrange the pins in the extruder. The traditional pin removal method needs to be pulled manually, which is time-consuming and labor-intensive. The low efficiency of this link not only affects the production progress, but also increases the labor intensity of workers.

[0003] The existing Chinese utility model patent with publication number CN207373081U discloses a special mallet for disassembling transmission pins. The mallet can disassemble the pins by using upper and lower limit blocks and a weight, but it needs two workers to operate together. One worker holds the upper end of the steel guide rod with both hands, and the other worker quickly lifts the steel weight to slide and impact the disc-shaped steel upper limit block. Continuous impact loosens and pulls out the pins. This process is time-consuming and labor-intensive, and it is easy to hit the hand. CONTENT

[0004] The purpose of the embodiments of the present application is to provide a pin disassembling tool to solve the technical problems of time-consuming, labor-intensive and safety hazards in the prior art.

[0005] To achieve the above-mentioned purpose, the embodiments of the present application provide a pin disassembling tool, which comprises a main shaft, a threaded part, a reaction force mechanism, a striking part and a first limiting part arranged in sequence from bottom to top on the main shaft. The striking part is movably sleeved on the main shaft, and the upper and lower edges of the striking part extend outward to form a boss. A rope is tied between the two bosses, and the rope is used to pull the striking part to move reciprocally on the main shaft.

[0006] The reaction force mechanism comprises a second limiting part, an elastic part and a power transmission part arranged in sequence from bottom to top. The second limiting part is fixedly arranged on the main shaft, and the elastic part and the power transmission part are movably sleeved on the main shaft. The reaction force mechanism is used to bear the impact force brought by the striking part and provide a reaction force for the striking part.

[0007] Preferably, the elastic force of the elastic part is greater than the gravity of the power transmission part.

[0008] Preferably, the power transmission part wraps the upper end of the elastic part.

[0009] Preferably, the free end of the rope is provided with a hand ring.

[0010] Preferably, the hand ring is provided with a hand holding part, and the hand holding part is provided with an anti-slip protrusion.

[0011] Preferably, the first limiting member is fixedly arranged at the upper end of the main shaft.

[0012] Preferably, the rope is made of nylon.

[0013] Preferably, the elastic member is a spring.

[0014] The beneficial effects of the present application are that the present application provides a special tool for disassembling a pin, which can pull out the pin by operating the rope with one hand of the worker to drive the impact member to realize reciprocating motion on the main shaft. During the reciprocating motion, the impact member utilizes the gravity of the impact member, the inertial force of the reciprocating motion, and the reaction force provided by the reaction force mechanism to form a resultant force to pull out the pin. The reaction force mechanism includes a second limiting member, an elastic member, and a power transmission member arranged from bottom to top, and the elastic member and the second limiting member jointly act on the recovery force generated by the impact of the impact member and the upward impact force to form a resultant force to provide an upward reaction force for the impact member. Compared with the traditional impact force of the upward impact of the weight, the present application increases the reaction force provided by the reaction force mechanism and the inertial force of the reciprocating motion, significantly improves the force for pulling out the pin, makes the upward pulling force stronger, shortens the time required for pulling out the pin, and improves the efficiency.

[0015] Moreover, the elastic member provided by the present application can maximize the relief of the downward impact force of the impact member during the downward impact of the impact member, reduce the vibration felt by the operator's hand, and be safer.

[0016] In summary, the time for disassembling the pin using the present application is shorter, the effort spent is smaller, and the efficiency and safety of the work are higher. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Fig. 1 A front view of a special tool for disassembling a pin provided by an embodiment of the present application;

[0019] Fig. 2 A sectional view of a special tool for disassembling a pin provided by an embodiment of the present application.

[0020] In the figure: 1. first limiting member; 2. impact member; 3. main shaft; 4. power transmission member; 5. elastic member; 6. second limiting member; 7. threaded member; 8. rope; 9. hand ring. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application and not to limit the present application.

[0022] Please refer to Figs. 1-2 A pin dismounting tool provided by an embodiment of the present application comprises a main shaft 3, which is sequentially provided with a threaded part 7, a reaction force mechanism, a striking part 2 and a first limiting part 1 from bottom to top. The striking part 2 is movably sleeved on the main shaft 3, and the upper and lower edges of the striking part 2 extend outward to form two protrusions. A rope 8 is tied between the two protrusions, and the rope 8 is used to pull the striking part 2 to make reciprocating motion on the main shaft 3.

[0023] The reaction force mechanism comprises a second limiting part 6, an elastic part 5 and a power transmission part 4, which are sequentially arranged from bottom to top. The second limiting part 6 is fixedly arranged on the main shaft 3, and the elastic part 5 and the power transmission part 4 are movably sleeved on the main shaft 3. The reaction force mechanism is used to bear the impact force brought by the striking part 2 and provide a reaction force for the striking part 2. The elastic part 5 can be a spring, an elastic rod or the like. In the present embodiment, the elastic part 5 is preferably a spring, which is sleeved on the main shaft 3 and located between the second limiting part 6 and the power transmission part 4. The power transmission part 4 is a baffle.

[0024] Specifically, the elastic force of the elastic part 5 is greater than the gravity of the power transmission part 4, so that the elastic part 5 still has the ability to deform in the natural state of the device, to ensure that the elastic part 5 can still deform when the striking part 2 strikes, generate elastic force to buffer, and at the same time, provide upward restoring force for the striking part 2 after being struck by the striking part 2. Moreover, the power transmission part 4 wraps the upper end of the elastic part 5. Such a design not only limits the elastic part 5, but also evenly transitions the stress point of the elastic part 5 to the center of the power transmission part 4. When in use, the elastic part 5 can evenly bear the counter-impact force transmitted by the power transmission part 4, and evenly disperse these forces into the elastic part 5, so as to reduce the damage to the second limiting part 6 caused by the counter-impact force, and further prolong the service life of the device.

[0025] During operation, the elastic part 5 has sufficient elastic force to bear the downward impact force brought by the striking part 2 transmitted by the power transmission part 4, and uses the upward reaction force provided by the elastic part 5 and the second limiting part 6 to the striking part 2 transmitted by the power transmission part 4, i.e. the upward impact force generated by the second limiting part 6 after striking and the restoring force generated by the elastic part 5 after striking. The reaction force mechanism not only plays a very good buffering role, but also enhances the upward pulling force, so that the time for pulling out the pin is shorter and the effort spent is smaller. At the same time, the operator's bearing counter-vibration force is significantly reduced, the operator is protected, and the safety is improved.

[0026] Further, the two bosses of the impact piece 2 can ensure that the impact piece 2 will not fall off during the reciprocating movement on the main shaft 3, ensuring the safety of the impact process. The free end of the rope 8 is provided with a hand ring 9, the hand ring 9 is provided with a hand holding part, and the hand holding part is provided with anti-skid protrusions made of rubber material, which can ensure that the rope 8 will not fall off the operator's hand during the pulling process, ensuring the safety of the operator.

[0027] In use, the operator holds the hand holding part of the hand ring 9 and pulls the rope 8 up and down, and the rope 8 reciprocates under the pulling of the hand ring 9, driving the impact piece 2 to reciprocate on the main shaft 3. It is worth noting that the length of the main shaft 3 is not limited here, and the length of the main shaft 3 can be set according to the size of the pin. For example, the larger the pin and the larger the contact area between the pin and the hole wall, the greater the friction of the pin, and the longer the length of the main shaft 3 required; the smaller the pin and the smaller the contact area between the pin and the hole wall, the smaller the friction of the pin, and the shorter the length of the main shaft 3 required.

[0028] In this embodiment, the rope 8 is made of nylon material and is formed by dry yarn winding. This material can better optimize the internal structure of the rope 8 after dry yarn winding, so as to better balance and disperse the external load. Therefore, the rope 8 can better withstand the external reciprocating pulling force, significantly reducing the vibration felt by the operator during use, making the operation more convenient, comfortable and safe.

[0029] In an alternative embodiment, the first limiting piece 1 and the second limiting piece 6 are welded on the main shaft 3, wherein the first limiting piece 1 is fixedly arranged at the upper end of the main shaft 3 and is made of a precision steel cylinder with a length of 0.8-1.5 cm, so as to ensure the strength of the device and improve the carrying capacity and resistance of the main shaft 3. At the same time, the first limiting piece 1 and the second limiting piece 6 made of precision steel have higher strength, which can better intercept the impact force caused by the reciprocating movement of the impact piece 2, thereby better driving the impact piece 2 to reciprocate.

[0030] The operation scene and method of this embodiment are as follows: the threaded part 7 is screwed with the pin, and then the operator pulls the rope 8 to pull the impact piece 2 to reciprocate on the main shaft 3 until the pin is pulled out.

[0031] During this process, the operator pulls the rope 8 with one hand to reciprocate, and drives the impact piece 2 to reciprocate together.

[0032] When the impact piece 2 moves upward and hits the first limiting piece 1, the first limiting piece 1 intercepts the impact force provided by the impact piece 2, drives the entire device to move upward, provides upward force for the pin screwed outside the threaded part 7, and provides downward impact force for the impact piece 2.

[0033] The downward impact force provided by the impact member 2 in combination with the inertial force generated by its own gravity and the downward impact force provided by the first limiting member 1 moves downward until it hits the power transmission member 4, the power transmission member 4 is pressed against the elastic member 5 located in the recess of the power transmission member 4 by the impact member 2 providing the downward impact force, the elastic member 5 is deformed to generate an elastic force, which buffers the downward impact force transmitted by the power transmission member 4, and hits the second limiting member 6, the second limiting member 6 intercepts the downward impact force provided by the elastic member 5 after being hit, at the same time, provides an upward impact force to the elastic member 5, the elastic member 5 transmits the upward impact force provided by the second limiting member 6 and the restoring force generated after being hit by the impact member 2, i.e. the reaction force, to the power transmission member 4, the power transmission member 4 transmits the reaction force to the impact member 2, the impact member 2 moves upward under the drive of the reaction force and the inertial force of reciprocating motion until it hits the first limiting member 1 again, and the reciprocating motion is continued until the pin is pulled out.

[0034] The present application provides a special tool for pulling out a pin, which only needs one hand of the worker to operate the rope 8 to drive the impact member 2 to realize reciprocating motion on the main shaft 3, and the pin can be pulled out. During the reciprocating motion, the impact member 2 utilizes the gravity, the inertial force of reciprocating motion and the reaction force provided by the reaction force mechanism to form a resultant force to pull out the pin. The reaction force mechanism includes the second limiting member 6, the elastic member 5 and the power transmission member 4 arranged from bottom to top, and the restoring force generated by the elastic member 5 after being hit by the impact member 2 and the upward impact force provided by the second limiting member 6 jointly act to form a resultant force to provide an upward reaction force to the impact member 2. Compared with the traditional impact force of upward hitting by a weight, the present application increases the reaction force provided by the reaction force mechanism and the inertial force of reciprocating motion, significantly improves the force for pulling out the pin, makes the upward pulling force stronger, shortens the time required for pulling out the pin and improves the efficiency.

[0035] Furthermore, the elastic member 5 provided by the present application can maximize the buffering of the downward impact force of the impact member 2 during the downward impact of the impact member 2, reduce the vibration felt by the operator's hand, and be safer.

[0036] In summary, the time for pulling out the pin by using the present application is shorter, the effort spent is smaller, and the efficiency and safety of the work are higher.

[0037] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A pin disassembly tool comprising a spindle, characterized in that: The main shaft is sequentially provided with a threaded part, a reaction force mechanism, an impact part and a first limiting part from bottom to top, the impact part is movably sleeved on the main shaft, the upper and lower edges of the impact part extend outward to form two bosses, a rope is bound between the two bosses, and the rope is used to pull the impact part to make reciprocating movement on the main shaft. The reaction force mechanism comprises a second limiting part, an elastic part and a power transmission part which are sequentially arranged from bottom to top, the second limiting part is fixedly arranged on the main shaft, and the elastic part and the power transmission part are movably sleeved on the main shaft, and the reaction force mechanism is used to bear the impact force brought by the impact part and provide reaction force for the impact part.

2. A pin extractor tool as claimed in claim 1, wherein: The elastic force of the elastic part is greater than the gravity of the power transmission part.

3. A pin extractor tool as defined in claim 2, wherein: The power transmission part wraps the upper end of the elastic part.

4. A pin extractor tool as defined in claim 2, wherein: The free end of the rope is provided with a hand ring.

5. A pin extractor tool as defined in claim 4, wherein: The hand ring is provided with a hand holding part, and the hand holding part is provided with anti-skid protrusions.

6. A pin extractor tool as defined in claim 2, wherein: The first limiting part is fixedly arranged on the upper end of the main shaft.

7. A pin extractor tool as defined in claim 4, wherein: The rope is made of nylon.

8. A pin extractor tool as claimed in any one of claims 1 to 7, wherein: The elastic part is a spring.

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