Pin dismounting device

Abstract

The utility model discloses a pin dismounting device, which relates to the technical field of dismounting tools and comprises a supporting seat, a pull rod, a sliding hammer and a prying rod. The supporting base comprises a positioning cylinder and a support arranged on one side of the positioning cylinder, and the positioning cylinder is used for being fixed to the upper portion of the pin. The pull rod penetrates downwards from the upper end of the positioning cylinder, the lower end of the pull rod is provided with a threaded section for connecting a pin, the upper end of the pull rod is provided with a fixing plate, and the pull rod and the fixing plate form a T shape; the sliding hammer is slidably arranged on the pull rod; the middle of the prying rod is hinged to the upper end of the support, one end of the prying rod is movably connected with the sliding hammer, and the prying rod is used for driving the sliding hammer to slide upwards so as to impact the fixing plate. When the pin is disassembled, time and labor can be saved, and the pin can be disassembled in a balanced and stable mode.

Description

Technical Field

[0001] The utility model relates to the technical field of disassembly tools, in particular to a pin disassembly device. Background Art

[0002] Pins, as components connecting multiple mechanical workpieces, are widely used in various equipment and structures. Removal of pins is often necessary during equipment maintenance. Traditional disassembly methods often involve hammering, pliers, or other hard removal methods. However, due to the difficulty in controlling the force, this often results in pin deformation, breakage, or damage to the hole wall, affecting subsequent use. Therefore, some pins are equipped with internal threaded holes that can be connected to a disassembly device, which applies a balanced disassembly force to the pin to prevent damage to the pin and the hole. For example, patent document CN220499045U discloses a device for removing an interference pin, comprising a puller, a nut, a rod, and a weight; the rod is inserted into the weight; the nut and puller are threadedly connected to the rod; and the puller is mounted on the interference pin. Removing the pin by repeatedly striking the rod with a handheld weight is time-consuming and labor-intensive. Furthermore, the pin is very unstable when about to be removed, easily swaying from side to side. If the force of the weight is not properly controlled, the operator may even injure himself. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a pin disassembly device, which can save time and labor when disassembling the pin, and is relatively balanced and stable when the pin is disassembled.

[0004] In order to solve the above problems, the present invention adopts the following technical solutions:

[0005] A pin removal device includes a support seat, a pull rod, a sliding hammer and a prying rod; the support seat includes a positioning cylinder and a bracket arranged on one side of the positioning cylinder, the positioning cylinder is used to be fixed above the pin; the pull rod passes downward from the upper end of the positioning cylinder, the lower end of the pull rod is provided with a threaded section for connecting the pin, the upper end of the pull rod is provided with a fixing plate, the pull rod and the fixing plate form a T-shape; the sliding hammer is slidably provided on the pull rod; the middle part of the prying rod is hinged to the upper end of the bracket, one end of the prying rod is movably connected to the sliding hammer, and the prying rod is used to drive the sliding hammer to slide upward to hit the fixing plate.

[0006] Furthermore, a sliding hole is provided in the middle of the sliding hammer, the sliding hole runs through the upper end of the sliding hammer to the lower end thereof, and the pull rod passes through the sliding hole.

[0007] Furthermore, two radial convex shafts are provided on the outside of the sliding hammer, a U-shaped connecting head is provided at one end of the prying rod, and sliding grooves are provided on both sides of the connecting head. The sliding hammer is provided on the inside of the connecting head, and the convex shaft can be slidably provided in the sliding groove.

[0008] Furthermore, a detachable seat is provided at the lower end of the positioning cylinder, and the lower end of the seat is provided with a fitting surface for fitting to the surface of the workpiece, and the fitting surface is any one of an inclined surface, a curved surface, and a spherical surface.

[0009] Furthermore, a nut for fastening to the upper end surface of the pin is provided on the threaded section.

[0010] Furthermore, the bracket is a trapezoidal frame body, and the top angle of the upper end of the bracket is higher than the upper end surface of the positioning tube.

[0011] Furthermore, the prying rod is provided with a first handle on an end thereof away from the end connected to the sliding hammer, and the bracket is provided with a second handle on a side thereof which is vertically arranged.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. By setting a pull rod and a pin connection, a sliding hammer is set on the pull rod, and a pry rod is used to pry the sliding hammer upward to hit the fixed plate. The lever principle is used to drive the sliding hammer to remove the pin, thereby saving time and effort.

[0014] 2. The support base of the device includes a positioning cylinder that is sleeved above the fixed pin. In this way, when the pin is about to be completely pulled out, the pull rod is not easy to shake, making the disassembly process more balanced and stable. In addition, since the pin is inside the positioning cylinder, it is not easy to suddenly fly out and injure people around. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 It is a cross-sectional view of an embodiment of the present utility model.

[0017] Figure 3 It is a structural schematic diagram of the middle pull rod and the sliding hammer in an embodiment of the utility model.

[0018] Numbers in the figure: 1. Fixed plate; 2. Pull rod; 21. Threaded section; 3. Sliding hammer; 31. Sliding hole; 4. Connector; 5. Slide groove; 6. Protruding shaft; 7. Pry rod; 8. Support seat; 81. Positioning cylinder; 82. Bracket; 9. First handle; 10. Second handle; 11. Pad; 111. Fitting surface; 12. Nut; 13. Pin. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] like Figures 1 to 3 As shown, the pin removal device of this embodiment includes a support base 8, a pull rod 2, a sliding hammer 3, and a prying rod 7. The support base 8 includes a positioning cylinder 81 and a bracket 82 disposed on one side of the positioning cylinder 81. The positioning cylinder 81 is used to be fixed above the pin. Specifically, the positioning cylinder 81 is a circular cylinder, and the bracket 82 is a trapezoidal frame body welded to the side of the positioning cylinder 81. The top angle of the bracket 82 is higher than the upper end surface of the positioning cylinder 81.

[0021] In different mechanical equipment, the surface of the workpiece connected by the pin is not necessarily flat. In order to stably place the positioning cylinder 81 above the pin, the lower end of the positioning cylinder 81 must be in contact with the surface of the workpiece. Therefore, a detachable pad 11 is provided at the lower end of the positioning cylinder 81. The pad 11 can be connected by threaded connection, snap connection, etc. The lower end of the pad 11 is provided with a fitting surface 111 for fitting to the surface of the workpiece. The fitting surface 111 is any one of an inclined surface, an arc surface, and a spherical surface, depending on the specific usage.

[0022] Tie rod 2 extends downward from the upper end of positioning tube 81. A threaded section 21 for connecting to a pin is provided at the lower end of tie rod 2. Threaded section 21 is used to connect to the internal threaded hole of the pin. A fixing plate 1 is provided at the upper end of tie rod 2. Tie rod 2 and fixing plate 1 form a T-shape, so that tie rod 2 can be rotated through fixing plate 1 to screw threaded section 21 into the internal threaded hole. To ensure relative fixation between tie rod 2 and the pin, a nut 12 is provided on threaded section 21. Nut 12 is tightened to the upper end face of the pin, thereby stabilizing the connection between tie rod 2 and the pin and making disassembly safer.

[0023] The sliding hammer 3 is slidably mounted on the pull rod 2. The middle portion of the prying rod 7 is hinged to the upper end of the bracket 82, and one end of the prying rod 7 is movably connected to the sliding hammer 3. The prying rod 7 is used to drive the sliding hammer 3 to slide upward to strike the fixed plate 1. Specifically, a sliding hole 31 is provided in the middle portion of the sliding hammer 3. The sliding hole 31 extends from the upper end of the sliding hammer 3 to the lower end, and the pull rod 2 passes through the sliding hole 31. Two radially extending convex shafts 6 are provided on the outer side of the sliding hammer 3. A U-shaped connecting head 4 is provided at one end of the prying rod 7. Slide grooves 5 are provided on both sides of the connecting head 4. The sliding hammer 3 is provided on the inner side of the connecting head 4. The convex shaft 6 is slidably mounted in the slide groove 5, so that the sliding hammer 3 can be driven to slide on the pull rod 2 by rotating the prying rod 7.

[0024] The prying rod 7 is provided with a first handle 9 on an end thereof away from the end connected to the sliding hammer 3 , and the bracket 82 is provided with a second handle 10 on a vertically arranged side for easy hand-held use.

[0025] During use, first observe the surface shape of the workpiece connected by the pin, select a suitable pad 11 according to the surface shape and connect it to the lower end of the positioning cylinder 81, so that the positioning cylinder 81 can be stably placed on the pin, then connect the threaded section 21 to the inner screw hole of the pin, tighten the nut 12, hold the first handle 9 and the second handle 10 with both hands respectively, apply a downward force to the first handle 9, drive the pry rod 7 to rotate around the hinge point, thereby driving the sliding hammer 3 to move up and down along the pull rod 2, and impact the fixed plate 1, so as to pull out the pin. The pin pulling process is relatively smooth, and the pry rod 7 is used as a tool to pry the sliding hammer 3 to save time and effort. Due to the limitation of the positioning cylinder 81, the pin and the pull rod 2 are not easy to fly out, so it is not easy to injure the operator.

[0026] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A pin removal device, characterized in that: include: A support seat (8), the support seat (8) comprising a positioning cylinder (81) and a bracket (82) provided on one side of the positioning cylinder (81), the positioning cylinder (81) being used to be fixed above the pin; A pull rod (2), the pull rod (2) passes downward from the upper end of the positioning cylinder (81), the lower end of the pull rod (2) is provided with a threaded section (21) for connecting a pin, the upper end of the pull rod (2) is provided with a fixing plate (1), and the pull rod (2) and the fixing plate (1) form a T-shape; A sliding hammer (3), the sliding hammer (3) being slidably disposed on the pull rod (2); A prying rod (7), wherein the middle portion of the prying rod (7) is hinged to the upper end of the bracket (82), one end of the prying rod (7) is movably connected to the sliding hammer (3), and the prying rod (7) is used to drive the sliding hammer (3) to slide upward to hit the fixed plate (1).

2. The pin removal device according to claim 1, characterized in that: A sliding hole (31) is provided in the middle of the sliding hammer (3), and the sliding hole (31) runs through the upper end of the sliding hammer (3) to the lower end thereof, and the pull rod (2) passes through the sliding hole (31).

3. The pin removal device according to claim 1, characterized in that: Two radially extending convex shafts (6) are provided on the outside of the sliding hammer (3); a U-shaped connecting head (4) is provided at one end of the prying rod (7); sliding grooves (5) are provided on both sides of the connecting head (4); the sliding hammer (3) is provided on the inside of the connecting head (4); and the convex shaft (6) is slidably provided in the sliding grooves (5).

4. The pin removal device according to claim 1, characterized in that: The lower end of the positioning cylinder (81) is provided with a detachable pad (11), and the lower end of the pad (11) is provided with a fitting surface (111) for fitting to the surface of the workpiece, and the fitting surface (111) is any one of an inclined surface and a curved surface.

5. The pin removal device according to claim 1, characterized in that: The threaded section (21) is provided with a nut (12) for fastening to the upper end surface of the pin.

6. The pin removal device according to claim 1, characterized in that: The bracket (82) is a trapezoidal frame body, and the top angle of the upper end of the bracket (82) is higher than the upper end surface of the positioning cylinder (81).

7. The pin removal device according to claim 6, characterized in that: The prying rod (7) is provided with a first handle (9) on an end thereof away from the end connected to the sliding hammer (3), and the bracket (82) is provided with a second handle (10) on a side thereof which is vertically arranged.

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