Pin shaft pulling-out device

Abstract

The utility model relates to the technical field of pin pullers, and discloses a pin shaft pulling-out device which comprises a main rod, one end of the main rod is provided with a connecting assembly, the other end of the main rod is fixedly connected with a grip, the outer portion of the main rod is sleeved with a first limiting sleeve in a sliding mode, and the outer side of the first limiting sleeve is evenly connected with auxiliary supporting rods. One end of each auxiliary supporting rod is provided with a suction cup. Through cooperation of the first limiting sleeve, the auxiliary supporting rod and the suction cup, the suction cup is attached to the surface of a body to be pulled out so that the main rod can be further supported, and through cooperation of the second limiting sleeve, it is further guaranteed that the main rod can be kept stable in the pin pulling process; therefore, bending of the main rod due to the gravity action of the counterweight impact assembly is reduced, damage to the joint of the main rod and the connecting assembly is reduced, and the service life of the pin puller is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pin extractors, and particularly relates to a pin pulling device. Background Technique

[0002] A pin pulling device generally refers to a pin extractor (also known as a draw pin, a disassembly tool or an ejection tool), which is a tool specifically used for disassembling fasteners such as pins, shafts and keys in mechanical equipment. Such tools are widely used in mechanical maintenance, assembly and disassembly work;

[0003] The existing pin extractors mainly consist of a main rod, a handle, a slide hammer and a threaded connector. The threaded connector is threadedly connected to one end of the pin to be pulled out. By using the recoil effect of the slide hammer, the pin is pulled out from the shaft hole. However, in the actual use process, the main rod is mainly connected to the pin through the threaded connector. During the movement of the slide hammer, since no other auxiliary supporting components are provided on the main rod, the gravity of the slide hammer is likely to cause the main rod to bend during long-term use, especially increasing the stress at the connection between the main rod and the threaded connector, thus affecting the overall service life of the entire pin extractor. Therefore, there is certain room for improvement. Content of the Utility Model

[0004] The purpose of the utility model is to provide a pin pulling device to solve the problem that the existing pin extractor is not easy to support the main rod auxiliarily as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a pin pulling device, including a main rod, one end of the main rod is provided with a connection component, the other end of the main rod is fixedly connected with a handle, an outer side of the main rod is slidably sleeved with a first limiting sleeve, and auxiliary support rods are uniformly connected to an outer side of the first limiting sleeve. One ends of the auxiliary support rods are all provided with suction cups, inner side walls of the auxiliary support rods are all connected with support rods, and one ends of the support rods are commonly connected with a second limiting sleeve. Reinforcing rods are installed on one sides of the auxiliary support rods close to the first limiting sleeve, and one ends of the reinforcing rods are all connected to the outer side of the first limiting sleeve. An attaching surface of the suction cup is in the same direction as an inserting and using direction of the connection component. A counterweight impact component is sleeved on an outer side of the main rod, and one end of the counterweight impact component abuts against one end of the first limiting sleeve away from the connection component.

[0006] Preferably, the connection component includes a fixed block connected to one end of the main rod, and a rotating sleeve is sleeved outside the fixed block, and a threaded connector is fixedly connected to a bottom end of the rotating sleeve.

[0007] Preferably, the rotating sleeve is rotatably connected to the fixed block, and a top end of the fixed block and a threaded groove at a bottom end of the main rod form a threaded connection structure through a threaded head.

[0008] Preferably, the first limiting sleeve and the second limiting sleeve are coaxially distributed, and both the first limiting sleeve and the second limiting sleeve are slidably connected to the main rod.

[0009] Preferably, the counterweight impact assembly includes a sliding hammer sleeved outside the main rod, and L-shaped connecting rods are installed on the outer sides of the sliding hammer. A plurality of counterweight blocks are sleeved at one end of each L-shaped connecting rod, and threaded sleeves are sleeved at the ends of the L-shaped connecting rods away from the sliding hammer.

[0010] Preferably, the sliding hammer slides along the outside of the main rod, and the outer diameter of the sliding hammer is adapted to the outer diameter of the handle.

[0011] Preferably, the threaded sleeve is connected to the L-shaped connecting rod by threads, and the number of the counterweight blocks can be adjusted according to needs.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] (1) Through the cooperation of the first limiting sleeve, the auxiliary support rod and the suction cup, by using the attachment of the suction cup to the surface of the object to be pulled out, it is convenient to further support the main rod. With the cooperation of the second limiting sleeve, it is further ensured that the main rod can remain stable during the pin pulling process, which is beneficial to reducing the bending of the main rod due to the gravity of the counterweight impact assembly and reducing the damage at the connection between the main rod and the connection assembly. Therefore, it is beneficial to improve the service life of the pin puller.

[0014] (2) Through the sudden sliding impact of the sliding hammer towards the handle direction, the whole main rod is driven to be pulled outwards, so as to achieve the effect of pulling out the pin at the other end. At the same time, with the function of the counterweight block, it is convenient to increase the weight of the sliding hammer, so as to enhance the impact force and improve the pulling force for the relatively tight pin. At the same time, due to the function of the threaded sleeve, the number of the counterweight blocks can be adjusted to improve the flexibility of adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the counterweight impact assembly of the present utility model;

[0018] Figure 3Schematic three-dimensional structure diagram of the auxiliary support rod of the present utility model;

[0019] Figure 4 Schematic three-dimensional sectional structure diagram of the connection component of the present utility model.

[0020] Explanation of the reference numerals in the figure: 1, main rod; 2, grip; 3, counterweight impact assembly; 301, sliding hammer; 302, L-shaped connecting rod; 303, counterweight block; 304, threaded sleeve; 4, first limiting sleeve; 5, auxiliary support rod; 6, suction cup; 7, second limiting sleeve; 8, connection component; 801, fixed block; 802, rotating sleeve; 803, threaded connecting piece; 9, support rod; 10, strengthening rod. Specific implementation manners

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-4 , an embodiment provided by the present utility model: A pin pulling device, including a main rod 1, and a connection component 8 is arranged at one end of the main rod 1;

[0023] The connection component 8 includes a fixed block 801 connected to one end of the main rod 1, and a rotating sleeve 802 is sleeved outside the fixed block 801, and a threaded connecting piece 803 is fixedly connected to the bottom end of the rotating sleeve 802;

[0024] The rotating sleeve 802 is rotatably connected to the fixed block 801, and the top end of the fixed block 801 and the threaded groove at the bottom end of the main rod 1 form a threaded connection structure through a threaded head;

[0025] Specifically, as shown in Figure 1 , Figure 4 , when in use, the threaded structure of the threaded connecting piece 803 is used to match the threads on the pin, so as to realize the connection function between the main rod 1 and the pin;

[0026] The other end of the main rod 1 is fixedly connected with a grip 2, a first limiting sleeve 4 is slidably sleeved outside the main rod 1, and a plurality of auxiliary support rods 5 are uniformly connected to the outer side of the first limiting sleeve 4. Suction cups 6 are arranged at one ends of the auxiliary support rods 5, support rods 9 are connected to the inner side walls of the auxiliary support rods 5, and one ends of the support rods 9 are commonly connected to a second limiting sleeve 7;

[0027] The first limiting sleeve 4 and the second limiting sleeve 7 are coaxially distributed, and both the first limiting sleeve 4 and the second limiting sleeve 7 are slidably connected to the main rod 1;

[0028] Specifically, as Figure 1 , Figure 3 shown, during use, the cooperation of the suction cup 6, the auxiliary support rod 5, the first limiting sleeve 4, and the second limiting sleeve 7 is utilized to further support the main rod 1, ensuring the stable outward movement of the main rod 1, while reducing the stress at the connection between the main rod 1 and the connection component 8, and improving the stability during the pin extraction process;

[0029] Reinforcing rods 10 are installed on one side of the auxiliary support rod 5 close to the first limiting sleeve 4, and one end of each reinforcing rod 10 is connected to the outer side of the first limiting sleeve 4. The attachment surface of the suction cup 6 is in the same direction as the insertion and use direction of the connection component 8. A counterweight impact component 3 is sleeved on the outer side of the main rod 1, and one end of the counterweight impact component 3 abuts against the end of the first limiting sleeve 4 away from the connection component 8;

[0030] The counterweight impact component 3 includes a sliding hammer 301 sleeved on the outside of the main rod 1, and L-shaped connecting rods 302 are installed on the outer side of the sliding hammer 301. A plurality of counterweight blocks 303 are sleeved on one end of each L-shaped connecting rod 302, and threaded sleeves 304 are sleeved on the end of each L-shaped connecting rod 302 away from the sliding hammer 301;

[0031] The sliding hammer 301 slides along the outside of the main rod 1, and the outer diameter of the sliding hammer 301 is adapted to the outer diameter of the handle 2;

[0032] The threaded sleeve 304 is connected to the L-shaped connecting rod 302 by threads, and the number of counterweight blocks 303 can be adjusted according to needs;

[0033] Specifically, as Figure 1 , Figure 2 shown, during use, the cooperation of the counterweight blocks 303 is utilized to change the weight of the sliding hammer 301, so as to adjust the impact force;

[0034] Working principle: When the present utility model is in use, first insert the threaded connector 803 into the end of the pin shaft, and by rotating the rotating sleeve 802, connect the threaded connector 803 to the pin shaft. After the installation is completed, slide the first limiting sleeve 4 towards the pin shaft, and use the suction cup 6 to adsorb the surface of the object where the pin shaft is located, thereby using the first limiting sleeve 4 and the second limiting sleeve 7 to further support the main rod 1;

[0035] Secondly, first fit the slide hammer 301 to one end of the first limiting sleeve 4, and then apply a thrust to the slide hammer 301 to make the slide hammer 301 slide along the main rod 1 towards the grip 2, so that the slide hammer 301 impacts the grip 2. Utilize the impact force to drive the main rod 1 to move outwards along the first limiting sleeve 4 and the second limiting sleeve 7, so that the connecting assembly 8 drives the pin shaft to move outwards. Through the reciprocating impact of the slide hammer 301, the effect of pulling out the pin shaft can be achieved;

[0036] Finally, by rotating the threaded sleeve 304, it is convenient to remove the threaded sleeve 304 from the L-shaped connecting rod 302, so that the counterweight 303 can be disassembled or added to increase the counterweight of the slide hammer 301, thereby achieving the effect of increasing the impact force.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A pin pulling device, comprising a main rod (1), characterized in that: One end of the main rod (1) is provided with a connection component (8), the other end of the main rod (1) is fixedly connected with a grip (2), an outer side of the main rod (1) is slidably sleeved with a first limiting sleeve (4), and auxiliary support rods (5) are uniformly connected to an outer side of the first limiting sleeve (4). Suction cups (6) are arranged at one ends of the auxiliary support rods (5), support rods (9) are connected to inner side walls of the auxiliary support rods (5), and a second limiting sleeve (7) is commonly connected to one ends of the support rods (9). Reinforcing rods (10) are installed on one sides of the auxiliary support rods (5) close to the first limiting sleeve (4), and one ends of the reinforcing rods (10) are connected to the outer side of the first limiting sleeve (4). An attaching surface of the suction cup (6) is in the same direction as an inserting and using direction of the connection component (8). A weight impact component (3) is sleeved on an outer side of the main rod (1), and one end of the weight impact component (3) abuts against an end of the first limiting sleeve (4) away from the connection component (8).

2. The pin pulling device according to claim 1, wherein: The connection component (8) includes a fixing block (801) connected to one end of the main rod (1), and a rotating sleeve (802) is sleeved on an outer side of the fixing block (801). A threaded connecting piece (803) is fixedly connected to a bottom end of the rotating sleeve (802).

3. The pin pulling device according to claim 2, wherein: The rotating sleeve (802) is rotatably connected to the fixing block (801), and a top end of the fixing block (801) and a threaded groove at a bottom end of the main rod (1) form a threaded connection structure through a threaded head.

4. The pin pulling device according to claim 1, characterized in that: The first limiting sleeve (4) and the second limiting sleeve (7) are coaxially and collinearly distributed, and both the first limiting sleeve (4) and the second limiting sleeve (7) are slidably connected to the main rod (1).

5. The pin pulling device according to claim 1, characterized in that: The weight impact component (3) includes a sliding hammer (301) sleeved on an outer side of the main rod (1), and L-shaped connecting rods (302) are installed on an outer side of the sliding hammer (301). A plurality of weight blocks (303) are sleeved on one ends of the L-shaped connecting rods (302), and threaded sleeves (304) are sleeved on one ends of the L-shaped connecting rods (302) away from the sliding hammer (301).

6. The pin pulling device according to claim 5, wherein: The sliding hammer (301) slides along an outer side of the main rod (1), and an outer diameter of the sliding hammer (301) is adapted to an outer diameter of the grip (2).

7. A pin pulling device according to claim 5, characterized in that: The threaded sleeve (304) is connected to the L-shaped connecting rod (302) by threads, and a number of the weight blocks (303) can be variably adjusted as required.

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