Hydraulic pin inserting and pulling device

Abstract

The utility model discloses a hydraulic pin inserting and pulling device, and particularly relates to the technical field of pin pulling devices, the hydraulic pin inserting and pulling device comprises an oil cylinder, one end of the oil cylinder is provided with a supporting assembly, the supporting assembly comprises a plurality of lead screws arranged at one end of the oil cylinder, and one end of each lead screw is provided with a first nut used for being welded on a pin shaft lug plate; the output end of the oil cylinder is rotationally connected with a connecting rod. The supporting assembly is arranged, the first nut is welded to the pin shaft lug plate, the follow-up first nut is retained on the pin shaft lug plate, the pin shaft can be disassembled easily in the follow-up process, universality is high, the oil cylinder can be assembled and disassembled according to different pin shaft lengths by changing the positions of the reinforcing supporting plate and the second nut, the oil cylinder is supported through the reinforcing supporting plate and the lead screw, and assembling and disassembling are convenient. It can be effectively ensured that the output end of the oil cylinder and the connecting rod can be located on the same axis with the axial direction of the pin shaft, the stability when the pin shaft is pulled out is ensured, and axial damage can be effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of pin-pulling device technology, and more specifically, to a hydraulic pin-pulling device. Background Technology

[0002] A locating pin is a precision cylindrical or tapered pin, typically made of metal (such as steel or stainless steel) or hard plastic. Its main function is to ensure that two or more parts maintain a precise relative position during assembly, preventing misalignment. Examples include welding fixtures on automotive production lines, where the position of locating pins needs to be adjusted with each model update, and the widespread use of pins to position parts in mechanical assembly. When performing maintenance on parts, fitters must remove the pins before removing the parts.

[0003] Among them, patent CN217475843U discloses a pin-pulling device. The pin-pulling device includes a base, a limiting member, a moving member, and a connecting member. The base includes a receiving cavity and an oil injection hole communicating with the receiving cavity. The limiting member is connected to the base and covers the receiving cavity, and the limiting member has a clearance hole. The moving member is movably placed in the receiving cavity between the limiting member and the base. The moving member and the base are dynamically sealed to form an expandable chamber. The expandable chamber communicates with the oil injection hole. The moving member includes a recess, a moving sidewall surrounding the recess, and a moving bottom wall. The expandable chamber and the recess are separated by the moving sidewall. The connecting member can penetrate and connect to the moving bottom wall. The free end of the connecting member extending out of the recess acts on the pin to be pulled out in the workpiece.

[0004] In use, this structure allows the movable component to be positioned between the limiting component and the base, movably placed within the receiving cavity of the base. The connecting component passes through the clearance hole on the limiting component, the recess of the limiting component, and then through the movable bottom wall of the movable component to connect with the pin to be removed. Since the movable component and the base form an expandable chamber through a dynamic sealing connection, when hydraulic oil is injected into the oil injection hole, the hydraulic oil enters the expandable chamber and pushes the movable component to move. The connecting component moves accordingly, and the pin to be removed in the workpiece is loosened due to the tension of the connecting component, making it easy to remove the pin from the workpiece. However, this structure makes it difficult to ensure the stability of the positioning pin during use. Moreover, the inner wall of the positioning pin is usually fixed with threads. Unstable positioning pin removal can easily damage its internal threads. The large friction between the positioning pin and the pin hole during removal can also easily damage the pin hole, leading to a decrease in subsequent positioning accuracy. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a hydraulic insertion and removal pin device, which aims to solve the problems mentioned in the background art.

[0006] This utility model provides the following technical solution: a hydraulic insertion and removal pin device, including a hydraulic cylinder, one end of which is provided with a support component;

[0007] The support assembly includes several lead screws disposed at one end of the hydraulic cylinder, and each lead screw has a first nut for welding to the pin lug plate at one end.

[0008] The output end of the hydraulic cylinder is rotatably connected to a connecting rod, and the connecting rod is threadedly connected to a pin. The hydraulic cylinder, the connecting rod, and the pin lug are all on the same axis.

[0009] As can be seen, in the above technical solution, the first nut is welded to the pin lug plate, the connecting rod is pulled so that the connecting rod and the output end of the oil cylinder can extend, and then the connecting rod can extend to the middle of the pin. The connecting rod and the pin are threaded together, and then the pin and the connecting rod are fixed together. Then the oil cylinder is started, and the connecting rod is moved through the output end of the oil cylinder, so that the pin can be pulled out from the pin lug plate.

[0010] Optionally, in one possible implementation, multiple lead screws are distributed circumferentially along the axis of the hydraulic cylinder, and one end of each lead screw is provided with a reinforcing plate for support. A groove is provided on the outer side of the reinforcing plate. A retaining plate is fixedly provided at the end of the hydraulic cylinder near the groove. The retaining plate matches the groove and extends into the groove and engages with it. Several second nuts are rotatably connected to both sides of the reinforcing plate, and each pair of second nuts is respectively sleeved on the other end of the corresponding lead screw. The lead screw is threadedly connected to the second nuts, and the lead screw is slidably connected to the reinforcing plate. The reinforcing plate is fixed by the second nuts.

[0011] As can be seen, in the above technical solution, by welding the first nut to the pin lug plate, the first nut is subsequently retained on the pin lug plate, which facilitates the subsequent disassembly of the pin and has strong versatility. By changing the position of the reinforcing plate and the second nut, it can be adapted to the installation and disassembly of different pin lengths. At the same time, the hydraulic cylinder is supported by the reinforcing plate and the lead screw, which can effectively ensure that the output end of the hydraulic cylinder and the connecting rod are on the same axis as the pin, ensuring the stability when the pin is pulled out and effectively avoiding axial damage. In addition, the setting of the second nut, the slot and the clamping plate makes it convenient for the hydraulic cylinder to be installed on the reinforcing plate, and the reinforcing plate can be fixed to the lead screw by the second nut, improving the convenience of disassembly and installation of the hydraulic cylinder and the reinforcing plate.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] By setting up support components, the overall design is simple and the structure is reasonable compared with the existing technology. Through the corresponding cooperation of various structures, the connecting rod can extend to the middle of the pin shaft. The connecting rod and the pin shaft are threaded together, thereby fixing the pin shaft and the connecting rod together. Then, the hydraulic cylinder is activated, and the output end of the hydraulic cylinder retracts and drives the connecting rod to move, thereby allowing the pin shaft to be pulled out from the pin shaft ear plate.

[0014] By welding the first nut to the pin lug plate, the first nut is then retained on the pin lug plate, which facilitates the subsequent disassembly of the pin. It is highly versatile and can be adapted to different pin lengths by changing the position of the reinforcing plate and the second nut.

[0015] By reinforcing the support plate and lead screw to support the hydraulic cylinder, it is possible to effectively ensure that the output end of the hydraulic cylinder and the connecting rod are aligned with the axial axis of the pin, ensuring the stability of the pin when it is pulled out and effectively preventing axial damage. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0017] Figure 1 This is a front view of the overall structure of this utility model.

[0018] The attached diagram is labeled as follows: 1. Hydraulic cylinder; 2. Lead screw; 3. First nut; 4. Reinforcing support plate; 5. Second nut. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] As attached Figure 1The hydraulic insertion and removal pin device shown has a connecting rod that can extend to the middle of the pin shaft through a support component on the cylinder 1. The connecting rod is threadedly connected to the pin shaft, thereby fixing the pin shaft and the connecting rod together. Then, the cylinder 1 is activated, and the connecting rod is displaced through the output end of the cylinder 1, thereby allowing the pin shaft to be pulled out from the pin shaft lug. The first nut 3 is welded to the pin shaft lug, and the first nut 3 is then retained on the pin shaft lug, which facilitates the subsequent disassembly of the pin shaft. It has strong versatility. By changing the position of the reinforcing plate 4 and the second nut 5, it can be adapted to the installation and removal of different pin shaft lengths. The specific structural settings of the component are as follows.

[0021] The support assembly includes several lead screws 2 disposed at one end of the cylinder 1, and each lead screw 2 is provided with a first nut 3 for welding to the pin lug plate at one end;

[0022] The output end of the hydraulic cylinder 1 is rotatably connected to a connecting rod, and the connecting rod is threadedly connected to the pin. The hydraulic cylinder 1, the connecting rod, and the pin lug are all on the same axis.

[0023] Multiple lead screws 2 are distributed around the circumference of the axis of the hydraulic cylinder 1, and each lead screw 2 is provided with a reinforcing support plate 4 at one end. The outer side of the reinforcing support plate 4 is provided with a slot. A retaining plate is fixedly provided at the end of the hydraulic cylinder 1 near the slot. The retaining plate matches the slot and extends into the slot and engages with the slot. Several second nuts 5 are rotatably connected to both sides of the reinforcing support plate 4. Each pair of second nuts 5 is respectively sleeved on one end of the corresponding lead screw 2. The lead screw 2 is threadedly connected to the second nuts 5. The lead screw 2 is slidably connected to the reinforcing support plate 4. The reinforcing support plate 4 is fixed by the second nuts 5.

[0024] The specific working principle is as follows: When the pin is pulled out, each first nut 3 is installed on one end of the corresponding lead screw 2, and then the first nut 3 is welded to the pin ear plate. The connecting rod is pulled so that the connecting rod and the output end of the hydraulic cylinder 1 can extend. Then the connecting rod can extend to the middle of the pin and the connecting rod is threadedly connected to the pin, thereby fixing the pin and the connecting rod together. Then the hydraulic cylinder 1 is started, and the output end of the hydraulic cylinder 1 is used to retract and drive the connecting rod to move, thereby allowing the pin to be pulled out from the pin ear plate.

[0025] Furthermore, by welding the first nut 3 to the pin lug plate, the first nut 3 remains on the pin lug plate, which facilitates the subsequent disassembly of the pin and has strong versatility. By changing the position of the reinforcing plate 4 and the second nut 5, it can be adapted to the installation and disassembly of different pin lengths.

[0026] Meanwhile, the hydraulic cylinder 1 is supported by the reinforcing support plate 4 and the lead screw 2, which can effectively ensure that the output end of the hydraulic cylinder 1 and the connecting rod are on the same axis as the pin shaft, ensuring the stability when the pin shaft is pulled out and effectively avoiding axial damage.

[0027] Meanwhile, the second nut 5, the slot, and the plate facilitate the installation of the hydraulic cylinder 1 on the reinforcing support plate 4, while the reinforcing support plate 4 can be fixed to the lead screw 2 by the second nut 5, improving the convenience of disassembling and installing the hydraulic cylinder 1 and the reinforcing support plate 4.

[0028] Unlike existing technologies, this application discloses a hydraulic insertion and removal pin device. A connecting rod extends to the middle of the pin shaft and is threadedly connected to the pin shaft, thereby fixing the pin shaft and the connecting rod together. Then, the hydraulic cylinder 1 is activated, and the output end of the hydraulic cylinder 1 retracts and drives the connecting rod to move, thereby allowing the pin shaft to be pulled out from the pin shaft lug. The first nut 3 is welded to the pin shaft lug, and the first nut 3 is subsequently retained on the pin shaft lug, which facilitates subsequent disassembly of the pin shaft. It has strong versatility, and can be adapted to different pin shaft lengths for installation and removal by changing the position of the reinforcing plate 4 and the second nut 5.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A hydraulic knock-out pin device comprising a cylinder (1), characterized in that: One end of the oil cylinder (1) is provided with a support assembly; The support assembly comprises a plurality of lead screws (2) arranged at one end of the oil cylinder (1), and one end of each lead screw (2) is provided with a first nut (3) for welding on the pin shaft ear plate; The output end of the oil cylinder (1) is rotatably connected with a connecting rod, and the connecting rod is threadedly connected with the pin shaft.

2. A hydraulic pin device according to claim 1, wherein: The oil cylinder (1), the connecting rod and the pin shaft ear plate are on the same axis.

3. A hydraulic pin device according to claim 1, wherein: A plurality of lead screws (2) are circumferentially distributed along the axis of the oil cylinder (1), and one end of each lead screw (2) is provided with a reinforcing support plate (4) for supporting the oil cylinder.

4. A hydraulic pin device according to claim 3, wherein: The outer side of the reinforcing support plate (4) is provided with a clamping groove, and the end of the oil cylinder (1) close to the clamping groove is fixedly provided with a clamping plate.

5. A hydraulic pin device according to claim 4, wherein: The clamping plate is matched with the clamping groove, and the clamping plate extends into the clamping groove and is clamped with the clamping groove.

6. A hydraulic pin device according to claim 3, wherein: The two sides of the reinforcing support plate (4) are rotatably connected with a plurality of second nuts (5), and each two of the second nuts (5) are a group and are sleeved on one end of the corresponding lead screw (2).

7. A hydraulic pin device according to claim 1, wherein: The lead screw (2) is threadedly connected with the second nut (5), the lead screw (2) is slidably connected with the reinforcing support plate (4), and finally the position of the reinforcing support plate (4) is fixed by the second nut (5).

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