A stationary chain pin shaft dismounting device

Abstract

The utility model belongs to chain dismounting frock technical field discloses a kind of fixed chain pin shaft dismounting device, including base, base top surface fixedly connected portal frame, the middle fixed connection support pipe of portal frame, support pipe is sleeved with down pressure column, down pressure column bottom end fixedly connected down pressure needle;First through-hole corresponding with down pressure needle is set in base, and one L type limit frame is equipped in the both sides of first through-hole, L type limit frame includes flat plate, flat plate one end fixedly connected vertical block, and flat plate is slidably connected with base;The L type limit frame of the both sides of first through-hole is oppositely arranged, and vertical block is away from first through-hole, and form the chain link notch containing chain between two L type limit frames;It further includes fixed mechanism, fixed mechanism includes the first screw hole being set in the both sides of portal frame, and first screw hole is threadedly connected with limit bolt, and the side surface of limit bolt is not connected with L type limit frame.L type limit frame forms the variable chain link notch between, different specifications of chain can be clamped and fixed.

Description

Technical Field

[0001] This utility model belongs to the field of chain disassembly tooling technology, specifically relating to a fixed chain pin disassembly device. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] In industrial transmission systems, chains are core power transmission components, and the efficiency of disassembling and assembling their pins directly affects equipment maintenance costs and downtime. Traditional disassembly and assembly methods commonly use manual hammering, which has significant drawbacks: manual hammering easily causes metal shavings to fly, resulting in hand injuries to the operator.

[0004] To address this, the prior art discloses a chain disassembly device, including a bracket, a pressure mechanism, a moving platform, a mandrel, and a fixing mechanism. The bracket has a frame consisting of two columns and a crossbeam between the columns on one side. The moving platform is located below the crossbeam and its two ends are slidably connected to the columns. The upper end of the pressure mechanism is connected to the crossbeam, and its lower end is connected to the moving platform. The mandrel is vertically located on the lower surface of the moving platform, and the fixing mechanism is located below the mandrel and is fixedly connected to the bracket.

[0005] While the above technical solution can prevent workers from using hammers and avoid them hitting their hands while striking the pin, thus improving safety, it still has the following shortcomings: The device described above only supports a single chain specification and cannot meet the diverse requirements of 8-50mm chain pitch in the JB / T 11637-2013 standard. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a fixed chain pin disassembly device, which can solve the technical problem that the disassembly device in the prior art only supports a single chain specification.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A fixed chain pin disassembly device includes a base, a gantry frame fixedly connected to the top surface of the base, a support tube fixedly connected to the middle of the gantry frame, a pressure column sleeved inside the support tube, and a pressure pin fixedly connected to the bottom end of the pressure column. The base has a first through hole corresponding to the lower pressure needle. An L-shaped limit frame is provided on both sides of the first through hole. The L-shaped limit frame includes a flat plate. One end of the flat plate is fixedly connected to a vertical block. The flat plate is slidably connected to the base. The L-shaped limiting brackets on both sides of the first through hole are arranged opposite to each other, and the vertical block is far away from the first through hole, forming a chain groove between the two L-shaped limiting brackets to accommodate the chain; It also includes a fixing mechanism, which includes first screw holes on both sides of the gantry frame, with limit bolts connected to the internal threads of the first screw holes. The limit bolts are not connected to the side of the L-shaped limit frame.

[0008] Preferably, the bottom end of the pressing column is fixedly connected to the pressing needle via a tapered column. The diameter of the pressing needle is smaller than the diameter of the pressing column. The pressing needle and the tapered column have various specifications. The diameter of the pressing needle is different for different specifications. The bottom diameter of the tapered column is different for different specifications, but the top diameter is the same.

[0009] Preferably, the diameter of the top end of the conical column is equal to the diameter of the pressing column, and the diameter of the bottom end of the conical column is equal to the diameter of the pressing needle.

[0010] Preferably, the lower pressure column is threaded into the support tube.

[0011] Preferably, a rotating cap is fixedly connected to the end of the limiting bolt away from the L-shaped limiting frame, and an operating rod is fixedly connected to the periphery of the rotating cap.

[0012] Preferably, the base has a sliding groove, and the bottom of the flat plate is fixedly connected to a sliding frame, which is slidably connected in the sliding groove.

[0013] Preferably, the center of the first through hole and the midpoint of the sliding groove are the same point.

[0014] Preferably, fixing holes are provided at all four corners of the base.

[0015] Preferably, the upper end of the gantry frame has two second screw holes symmetrical to the support tubes, and the limit bolts are connected to the internal threads of the second screw holes. The width of the vertical block of the L-shaped limit frame is greater than the diameter of the limit bolt.

[0016] Preferably, a rotating handle is fixedly connected to the top of the pressing column, and the rotating handle is perpendicular to the pressing column.

[0017] Compared with the prior art, the advantages and positive effects of this utility model are: In this device, a support tube perpendicular to the base is fixedly connected to the gantry frame. The pressure column is coaxial with the support tube, and the support tube provides guidance for the pressure column, allowing the pressure column to apply pressure to the chain pin and remove the pin. L-shaped limiting frames that slide relative to the base are provided on both sides of the first through hole. A chain groove for accommodating the chain is formed in the L-shaped limiting frame, and the size of the chain groove is variable. It can not only clamp and fix the chain, but also clamp chains of different specifications to meet diverse application needs. In addition, the pressure column is connected to the pressure pin through a tapered column. The pressure pin has various specifications. When facing a pin of different size, the pressure column with the corresponding pressure pin can be replaced, further improving the diversity of application needs. Attached Figure Description

[0018] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0019] Figure 1 This is a perspective view of a fixed chain pin disassembly device according to Embodiment 1 or Embodiment 2 of this utility model; Figure 2 This is a front view of a fixed chain pin disassembly device according to Embodiment 1 or Embodiment 2 of this utility model; Figure 3 This is a top view of a fixed chain pin disassembly device according to Embodiment 1 or Embodiment 2 of this utility model; Figure 4 This is embodiment 1 or embodiment 2 of the present invention. Figure 3 Sectional view at point AA; Figure 5 This is an exploded view of a fixed chain pin disassembly device according to Embodiment 1 or Embodiment 2 of this utility model; Figure 6 This is a perspective view of the pressing column of Embodiment 1 or Embodiment 2 of this utility model; Figure 7 This is a perspective view of the limiting bolt of Embodiment 1 or Embodiment 2 of this utility model; Figure 8 This is a partial perspective view of a fixed chain pin disassembly device according to Embodiment 1 or Embodiment 2 of this utility model; Figure 9 This is a perspective view of the pressing column of Embodiment 2 of this utility model; In the picture: 1. Base; 2. Fixing hole; 3. Gantry frame; 4. First screw hole; 5. Second screw hole; 6. Sliding groove; 7. L-shaped limit bracket; 8. First through hole; 9. Support tube; 11. Limit bolt; 12. Rotating cap; 13. Operating lever; 14. Downward pressing column; 15. Conical column; 16. Downward pressing needle; 17. Rotating handle. Detailed Implementation

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] The present invention will now be described in detail with reference to the accompanying drawings.

[0022] Example 1 This embodiment discloses a fixed chain pin disassembly device, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the system includes a base 1, a gantry frame 3 fixedly connected to the top surface of the base 1, a support tube 9 fixedly connected to the middle of the gantry frame 3, the support tube 9 being perpendicular to the base 1, a pressing column 14 being sleeved inside the support tube 9, and a pressing pin 16 being fixedly connected to the bottom end of the pressing column 14. A first through hole 8 corresponding to the pressing pin 16 is opened on the base 1, penetrating both the top and bottom surfaces of the base 1. When a chain is placed on the base 1 with the pin positioned in the first through hole 8, the pressing column 14 is inserted into the support tube 9, aligning the pressing pin 16 with the pin. When the pressing column 14 moves downwards, it drives the pressing pin 16 downwards, thereby disassembling the pin from the chain.

[0023] It should be noted that the downward pressure column 14 is coaxially arranged with the support tube 9, and the diameter of the downward pressure column 14 is equal to the inner diameter of the support tube 9. The support tube 9 guides the downward pressure column 14. Figure 1 As can be seen, the combined length of the pressure column 14 and the pressure needle 16 is greater than the length of the support tube 9.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, an L-shaped limiting bracket 7 is also provided on the base 1. Specifically, an L-shaped limiting bracket 7 is provided on both sides of the first through hole 8, and the L-shaped limiting bracket 7 is slidably connected to the base 1. Figures 1 to 5 As shown, the L-shaped limiting frame 7 includes a flat plate, one end of which (the flat plate and the vertical block are fixedly connected by an integral manufacturing method) is fixedly connected to the vertical block. The vertical block and the flat plate are perpendicular to each other. The flat plate is parallel to and attached to the top surface of the base 1. The flat plate and the base 1 are slidably connected. The height of the vertical block is less than the height of the gantry frame 3.

[0025] like Figures 1 to 5 As shown, the L-shaped limiting brackets 7 on both sides of the first through hole 8 are arranged opposite each other, with the vertical blocks facing the gantry frame 3. A chain groove for accommodating the chain is formed between the two L-shaped limiting brackets 7. The chain is placed between the two L-shaped limiting brackets 7, with the chain pin aligned with the first through hole 8. Then, the two L-shaped limiting brackets 7 are slid towards the first through hole 8 to clamp the chain. It should be noted that the L-shaped limiting brackets 7 should not block the first through hole 8, i.e., the width of the horizontal plate of the L-shaped limiting bracket 7 ( Figure 1 (in the left and right directions) less than half the width of the minimum specification chain.

[0026] Understandably, by adjusting the distance between the two L-shaped limit brackets 7, chains of different specifications can be clamped to meet diverse application needs.

[0027] In this embodiment, as Figures 1 to 5 As shown, on the side of the L-shaped limiting frame 7 away from the first through hole 8, a fixing mechanism is provided between the L-shaped limiting frame 7 and the gantry frame 3 to push the L-shaped limiting frame 7 to fix the chain. Specifically, the fixing mechanism includes first screw holes 4 opened on both sides of the gantry frame 3, and the first screw holes 4 are internally threaded with limiting bolts 11. The limiting bolts 11 are not connected to the side of the L-shaped limiting frame 7.

[0028] Understandably, when the chain is placed between the two L-shaped limit brackets 7, the limit bolts 11 on both sides of the gantry frame 3 are rotated to move the ends of the limit bolts 11 toward the L-shaped limit brackets 7, thus clamping the chain in conjunction with the L-shaped limit brackets 7. After the chain pin is removed, the limit bolts 11 are loosened, and the two L-shaped limit brackets 7 are separated to remove the chain.

[0029] In one specific implementation, the base 1, the gantry 3, and the support tube 9 can all be made of steel, so the base 1 and the gantry 3, and the gantry 3 and the support tube 9 can be fixedly connected by welding.

[0030] like Figures 4 to 6 As shown, the bottom end of the pressure post 14 is fixedly connected to the pressure pin 16 via a tapered post 15. The diameter of the pressure pin 16 is smaller than the diameter of the pressure post 14. The top diameter of the tapered post 15 is equal to the diameter of the pressure post 14, and the bottom diameter of the tapered post 15 is equal to the diameter of the pressure pin 16. Due to different chain specifications, there may be pins of different sizes. The application requirements can be met by replacing the pressure post 14 with pressure pins 16 of different diameters (this can be achieved by machining multiple tapered posts 15 with different bottom diameters).

[0031] In this embodiment, the pressing pin and the tapered column have various specifications. The pressing pins of different specifications have different diameters, and the tapered columns of different specifications have different bottom diameters but the same top diameter. Connecting the tapered column 15 between the pressing column 14 and the pressing pin 16 can ensure that the pressing column 14 and the pressing pin 16 are coaxially arranged.

[0032] In this embodiment, the pressing column 14, the pressing needle 16, and the conical column 15 are all made of steel and can be fixedly connected by welding.

[0033] In this embodiment, the inner wall of the support tube 9 is provided with internal threads, and the outer wall of the pressing column 14 is provided with external threads. That is, the pressing column 14 is threadedly connected to the support tube 9. Rotating the pressing column 14 causes it to move downward, which in turn drives the pressing needle 16 to move downward. By applying vertical downward pressure, the pin is pressed out. Precise downward pressure control is achieved through threaded transmission. The support tube 9 and the pressing column 14 form a helical pair. The pressing column 14 makes precise axial displacement along the support tube 9, driving the pressing needle 16 to move downward synchronously.

[0034] like Figure 7 As shown, a rotating cap 12 is fixedly connected to the end of the limiting bolt 11 away from the L-shaped limiting frame 7, and an operating rod 13 is fixedly connected to the periphery of the rotating cap 12. The rotating cap 12 and the operating rod 13 are provided for user convenience. In this embodiment, the limiting bolt, rotating cap, and operating rod are all made of steel and can be fixedly connected by welding.

[0035] like Figure 4 , Figure 5 , Figure 8 As shown, a sliding groove 6 is provided on the base 1, and the bottom end of the L-shaped limiting frame 7 is slidably connected within the sliding groove 6. In this embodiment, the sliding frame is fixedly connected to the bottom end of the flat plate of the L-shaped limiting frame 7. The cross-section of the sliding groove 6 is U-shaped, and the cross-section of the sliding frame corresponds to the cross-section of the sliding groove 6, which is U-shaped. The U-shaped sliding groove 6 provides precise guidance for the L-shaped limiting frame 7, preventing the chain from shifting between the L-shaped limiting frames 7. In this embodiment, the flat plate and the sliding frame are made of steel and can be fixedly connected by welding.

[0036] like Figure 4 , Figure 5 As shown, the center of the first through hole 8 and the midpoint of the sliding groove 6 are the same point. After ensuring that the chain is aligned with the first through hole 8, when the L-shaped limiting brackets 7 on both sides of the first through hole 8 move toward the first through hole 8, the stroke on both sides of the first through hole 8 is consistent.

[0037] like Figures 1 to 3 As shown, fixing holes 2 are provided at the four corners of the base 1 to connect the base 1 to the ground, table, or tabletop, ensuring the overall stability of a fixed chain pin disassembly device.

[0038] like Figure 5 , Figure 8 As shown, the upper end of the gantry frame 3 has two second screw holes 5, which are symmetrically arranged relative to the support tube 9. The second screw holes 5 are threaded with limit bolts 11. After the limit bolts 11 in the first screw hole 4 clamp and limit the L-shaped limit frame 7 in the horizontal direction, the limit bolts 11 in the second screw holes 5 move downward, pressing the L-shaped limit frame 7 tightly against the surface of the base 1.

[0039] It should be noted that the device of this embodiment is manufactured according to the various chain sizes used to ensure that the distance between the L-shaped limit frames 7 can accommodate the largest chain size, while also ensuring that the L-shaped limit frames 7 do not block the first through hole 8.

[0040] It should also be noted that the width of the vertical block of the L-shaped limit frame 7 is greater than the diameter of the limit bolt 11. When the L-shaped limit frame 7 clamps the smallest or largest specification chain, the limit bolt 11 of the second screw hole is in contact with the top surface of the vertical block of the L-shaped limit frame 7.

[0041] Working principle: In this embodiment, the multiple fixing holes 2 provided on the base 1 can be rigidly connected to the workbench by bolts. During operation, the fixing holes 2 are first used to complete the overall positioning of the device. The gantry 3 and the base 1 form a rigid support frame. When working, the chain is first placed above the first through hole 8 of the base 1. The limit bolt 11 in the first screw hole is rotated by the operating lever 13 to push the L-shaped limit frame 7 on both sides to move along the sliding groove 6 towards the first through hole 8. The L-shaped limiting frame 7 uses a convex sliding frame and a concave sliding groove 6 for precise guidance, ultimately enabling the L-shaped limiting frame 7 to clamp and position the chain in the horizontal direction. Then, the limiting bolt 11 in the second screw hole is rotated to press the top surface of the vertical block of the L-shaped limiting frame 7, forming a double locking mechanism (limiting the horizontal displacement of the L-shaped limiting frame 7 and applying a vertical preload). A matching pressure pin 16 is selected for the chain, and the corresponding pressure pin 14 is threaded to the support tube 9. Rotating the pressure pin 14 causes the pressure pin 16 to move downwards, and the pressure pin 16 contacts the chain pin. The applied axial force is evenly transmitted to the chain pin through the pressure pin 16, pressing the pin out for disassembly. The device in this embodiment achieves zero-displacement operation during disassembly through a triple guarantee of "horizontal sliding limit + vertical bolt locking + rigid base fixing".

[0042] Example 2 The fixed chain pin disassembly device disclosed in this embodiment differs from the fixed chain pin disassembly device disclosed in Embodiment 1 in that, as Figure 9 As shown, a rotating handle 17 is fixedly connected to the top of the lower pressure column 14. The rotating handle 17 is perpendicular to the lower pressure column 14, facilitating the operation of rotating the lower pressure column 14. The remaining structure is the same as that in Embodiment 1. In this embodiment, the rotating handle is made of steel and can be connected to the lower pressure column by welding.

[0043] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A fixed chain pin disassembly device, characterized in that, Includes a base, a gantry frame is fixedly connected to the top surface of the base, a support tube is fixedly connected to the middle of the gantry frame, a pressure column is sleeved inside the support tube, and a pressure pin is fixedly connected to the bottom end of the pressure column; The base has a first through hole corresponding to the lower pressure needle. An L-shaped limiting frame is provided on both sides of the first through hole. The L-shaped limiting frame includes a flat plate, one end of which is fixedly connected to a vertical block. The flat plate is slidably connected to the base. The L-shaped limiting frames on both sides of the first through hole are arranged opposite to each other, and the vertical block is far away from the first through hole, forming a chain groove to accommodate the chain between the two L-shaped limiting frames; It also includes a fixing mechanism, which includes first screw holes on both sides of the gantry frame, with limit bolts threaded into the first screw holes. The limit bolts are not connected to the side of the L-shaped limit frame.

2. The fixed chain pin disassembly device as described in claim 1, characterized in that, The bottom end of the pressing column is fixedly connected to the pressing needle via a tapered column. The diameter of the pressing needle is smaller than that of the pressing column. The pressing needle and the tapered column have various specifications. The diameter of the pressing needle varies with the specifications. The bottom diameter of the tapered column varies with the specifications, but the top diameter is the same.

3. The fixed chain pin disassembly device as described in claim 2, characterized in that, The diameter of the top end of the conical column is equal to the diameter of the pressing column, and the diameter of the bottom end of the conical column is equal to the diameter of the pressing needle.

4. The fixed chain pin disassembly device as described in claim 1, characterized in that, The pressure column is threaded into the support tube.

5. A fixed chain pin disassembly device as described in claim 1, characterized in that, The end of the limiting bolt away from the L-shaped limiting frame is fixedly connected to a rotating cap, and an operating rod is fixedly connected to the periphery of the rotating cap.

6. The fixed chain pin disassembly device as described in claim 1, characterized in that, The base has a sliding groove, and the bottom of the flat plate is fixedly connected to a sliding frame, which is slidably connected in the sliding groove.

7. A fixed chain pin disassembly device as described in claim 6, characterized in that, The center of the first through hole is the same point as the midpoint of the sliding groove.

8. A fixed chain pin disassembly device as described in claim 1, characterized in that, Fixing holes are provided at all four corners of the base.

9. A fixed chain pin disassembly device as described in claim 1, characterized in that, The upper end of the gantry frame has two second screw holes symmetrical to the support tubes. The second screw holes are threaded with limit bolts. The width of the vertical block of the L-shaped limit frame is greater than the diameter of the limit bolt.

10. A fixed chain pin disassembly device as described in claim 1, characterized in that, A rotating handle is fixedly connected to the top of the pressing column, and the rotating handle is perpendicular to the pressing column.

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