A hook head three-ring chain for mine cars with convenient replacement

Abstract

A kind of hook head three-ring chain of mine car for easy replacement, it is related to three-ring chain connection technical field, the utility model discloses in order to solve the problem that three-ring chain in existing steel wire rope hook head chain is usually closed annular structure, cannot be disassembled from the rope head ring cable, inconvenient for the replacement of three-ring chain, including upper connecting plate, lower connecting plate, tightening device, hollow column, three-ring chain and steel wire rope ring cable;Upper connecting plate and lower connecting plate are supported by two hollow columns, two tightening devices pass through upper connecting plate, hollow column and lower connecting plate in turn, tightening device is used to push upper connecting plate and lower connecting plate to each other, three-ring chain is sleeved on the left end hollow column, steel wire rope ring cable is sleeved on the right end hollow column, the tightening device includes cylinder, eccentric device and stopper;Cylinder passes through upper connecting plate, hollow column and lower connecting plate in turn, the upper end of cylinder is rotatably connected with the shaft, the both sides of the shaft are fixed with eccentric device, the utility model is used for three-ring chain connection.

Description

Technical Field

[0001] This utility model relates to the field of three-ring chain connection technology, and in particular to a hook-type three-ring chain for mining cars that is easy to replace. Background Technology

[0002] The wire rope hook chain consists of two parts: a rope end loop and a three-ring chain. This connection method is commonly used in coal mining enterprises for mechanical hoisting and transportation, connecting the wire rope to the mine car. The wire rope hook chain is generally suitable for hoisting mine cars with an inclination angle of less than 30 degrees. The mine car three-ring chain is a key component in the mining transportation system used to connect the mine cars. It typically consists of three interconnected metal links, forged or welded from high-strength alloy steel to ensure its load-bearing capacity and impact resistance. During mine car operation, the three-ring chain is constantly under stress, needing to withstand not only the static load of a fully loaded mine car but also the impact loads from uneven tracks and vehicle starts and stops. This continuous dynamic stress causes slight relative sliding at the hinge points of the chain links, and the metal surface gradually wears down under repeated friction, forming typical abrasive wear. Especially in mines with high transport volumes, the wear rate of the three-ring chain accelerates significantly. The structural characteristics of the three-ring chain also determine its specific wear pattern. In practical use, wear of three-link chains is usually manifested as a gradual decrease in the diameter of the chain links, obvious wear marks on the surface, local deformation, or crack expansion. These characteristics need to be detected and replaced in a timely manner through regular inspection.

[0003] However, the inventors discovered that the three-ring chain in the wire rope hook chain is usually a closed loop structure, which cannot be disassembled from the rope end loop. When the three-ring chain cracks or wears and needs to be replaced, it can only be replaced by re-tying the hook chain, which is inconvenient for replacing the three-ring chain. Utility Model Content

[0004] To address the problem that the three-ring chain in existing wire rope hook chains is usually a closed loop structure, making it impossible to disassemble from the rope end ring and inconvenient to replace, this utility model provides a replaceable hook three-ring chain for mine cars, thus solving the problems mentioned in the background art.

[0005] The technical solution of this utility model is:

[0006] A replaceable hook three-ring chain for mining cars includes an upper connecting plate, a lower connecting plate, a tightening device, a hollow column, a three-ring chain, and a wire rope loop.

[0007] The upper and lower connecting plates are supported by two hollow columns. Two tightening devices pass through the upper connecting plate, the hollow columns and the lower connecting plate in sequence. The tightening devices are used to push the upper and lower connecting plates closer together. A three-ring chain is fitted on the hollow column at the left end and a wire rope loop is fitted on the hollow column at the right end.

[0008] Furthermore, the tightening device includes a column, an eccentric device, and a stop;

[0009] The column passes through the upper connecting plate, the hollow column and the lower connecting plate in sequence. The upper end of the column is rotatably connected to the shaft. Eccentric devices are fixed on both sides of the shaft. The eccentric devices abut against the upper end face of the upper connecting plate. A stop is provided at the bottom of the column, and the stop abuts against the lower end face of the lower connecting plate.

[0010] Furthermore, the column and the stop are integrally formed.

[0011] Furthermore, the lower connecting plate is provided with a disassembly groove through which the stop block can pass.

[0012] Furthermore, the eccentric device is an eccentric cylinder.

[0013] Furthermore, the eccentric device is a cam.

[0014] Furthermore, the distal end of the eccentric device is provided with a handle.

[0015] Furthermore, the upper end of the upper connecting plate is provided with an anti-slip baffle that can restrict the handle from flipping.

[0016] Furthermore, the anti-detachment baffle is provided with a limiting protrusion.

[0017] Furthermore, a fan-shaped groove is provided at the bottom of the lower connecting plate, and the stop block is rotatably connected in the fan-shaped groove.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] A replaceable hook-type three-ring chain for mining cars includes a tightening device that brings the upper and lower connecting plates closer together. The tightening device has an eccentric mechanism at the top and a stop at the bottom. The eccentric mechanism abuts against the upper end face of the upper connecting plate, and the stop abuts against the lower end face of the lower connecting plate. Rotating the eccentric mechanism causes its distal end to press against the upper connecting plate, locking the lower connecting plate. Rotating the eccentric mechanism again causes its proximal end to move closer to the upper connecting plate, pulling the column out of the lower connecting plate and removing it. This allows for quick assembly and disassembly of the three-ring chain. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention, which connects the rope end loop and the three-ring chain;

[0021] Figure 2 This is a schematic diagram of the structure of the present invention. Figure I ;

[0022] Figure 3 This is a schematic diagram of the structure of the present invention. Figure II ;

[0023] Figure 4 This is an exploded view of the present invention;

[0024] Figure 5 Exploded view of the tightening device;

[0025] Figure 6 This is an assembly drawing of the tightening device and the upper connecting plate;

[0026] Figure 7 This is a structural schematic diagram of the lower connecting plate;

[0027] Figure 8 This is a longitudinal sectional view of the present invention;

[0028] Figure 9 This is a structural diagram of the handle and the anti-slip baffle.

[0029] In the diagram: 1. Upper connecting plate; 2. Lower connecting plate; 201. Disassembly groove; 202. Fan-shaped groove; 305. Handle; 3. Tightening device; 4. Hollow column; 5. Three-ring chain; 6. Wire rope loop; 301. Column; 302. Rotating shaft; 303. Eccentric device; 304. Stop block; 7. Anti-detachment baffle; 8. Limiting protrusion. Detailed Implementation

[0030] Specific implementation method one: See Figure 1-4 As shown in Figure 8, a three-ring chain for a mine car with an easy-to-replace hook is provided in this embodiment, which includes an upper connecting plate 1, a lower connecting plate 2, a tightening device 3, a hollow column 4, a three-ring chain 5, and a wire rope ring cable 6.

[0031] The upper connecting plate 1 and the lower connecting plate 2 are supported by two hollow columns 4. Two tightening devices 3 pass through the upper connecting plate 1, the hollow column 4 and the lower connecting plate 2 in sequence. The tightening devices 3 are used to push the upper connecting plate 1 and the lower connecting plate 2 closer to each other. A three-ring chain 5 is sleeved on the hollow column 4 at the left end, and a wire rope ring cable 6 is sleeved on the hollow column 4 at the right end.

[0032] Furthermore, both the upper connecting plate 1 and the lower connecting plate 2 are waist-shaped plate structures, serving to bear the tension between the wire rope loop 6 and the three-ring chain 5. The tightening device 3 is a cylindrical structure, serving to bear the shear force between the upper connecting plate 1, the lower connecting plate 2, and the three-ring chain 5. Two sets of circular holes are concentrically formed on the upper connecting plate 1 and the lower connecting plate 2, through which the two tightening devices 3 pass respectively. Two hollow columns 4 are positioned between the upper connecting plate 1 and the lower connecting plate 2, serving to support them. In this device, the hollow columns 4 protect the tightening devices 3, preventing deformation and cracking caused by friction from the three-ring chain 5 and the wire rope loop 6. The hollow columns 4 are detachable wear parts; if they crack, they need to be replaced. In use, the three-ring chain 5 and the wire rope loop 6 are respectively placed on the two hollow columns 4. The hollow columns 4 press against the inner side of the upper connecting plate 1 and the lower connecting plate 2. The tightening device 3 squeezes the upper connecting plate 1 and the lower connecting plate 2 from the upper and lower sides to complete the connection of the three-ring chain 5 and the wire rope loop 6.

[0033] Specific implementation method two: See Figure 5-6 As shown, the tightening device 3 in this embodiment includes a column 301, an eccentric device 303, and a stop block 304.

[0034] The column 301 passes through the upper connecting plate 1, the hollow column 4 and the lower connecting plate 2 in sequence. The upper end of the column 301 is rotatably connected to the rotating shaft 302. The two sides of the rotating shaft 302 are fixed with eccentric devices 303. The eccentric devices 303 abut against the upper end face of the upper connecting plate 1. The bottom of the column 301 is provided with a stop block 304, which abuts against the lower end face of the lower connecting plate 2.

[0035] Furthermore, the column 301 has a cylindrical structure, and a shaft hole is provided at the upper end of the column 301, which is perpendicular to the axis of the column 301. The rotating shaft 302 and the eccentric device 303 are separate structures. The eccentric device 303 is provided with a circular hole, and the rotating shaft 302 is fitted into the circular hole in the eccentric device 303 by interference fit, so as to facilitate the assembly of this device. The eccentric device 303 applies a tension force between the column 301 and the upper connecting plate 1 by changing the distance between its end face and the rotating shaft 302. The stop block 304 has a flat structure and is used to bear the tension force between the column 301 and the lower connecting plate 2.

[0036] During assembly, first, the hollow column 4 is fitted onto the column 301, and the two sets of columns 301 are passed through the upper connecting plate 1. The eccentric device 303 is placed on both sides of the column 301, and the round hole on the eccentric device 303 is made concentric with the shaft hole on the column 301. A heavy object is used to hammer the rotating shaft 302 into the round hole on the eccentric device 303 and the shaft hole on the column 301 to complete the assembly of the device.

[0037] When connecting the three-ring chain 5, the three-ring chain 5 and the wire rope ring cable 6 are respectively placed on the hollow columns 4 on the left and right sides. The stop block 304 is passed through the lower connecting plate 2 and the stop block 304 is rotated so that the stop block 304 is misaligned with the disassembly groove 201 on the lower connecting plate 2. The eccentric device 303 is rotated so that the distal end of the eccentric device 303 presses against the upper connecting plate 1, thereby completing the tensioning of the column 301 and locking the lower connecting plate 2.

[0038] When disassembling the three-ring chain 5, rotate the eccentric device 303 so that its proximal end is close to the upper connecting plate 1, loosening the column 301. Rotate the column 301 to pull it out from the lower connecting plate 2, thus removing the lower connecting plate 2. This allows for quick assembly and disassembly of the three-ring chain.

[0039] Specific implementation method three: See Figure 5-6 As shown, the column 301 and the stop block 304 in this embodiment are integrally formed.

[0040] Furthermore, in order to ensure that the column 301 and the stop 304 can withstand the tension of the eccentric device 303, the column 301 and the stop 304 are integrally cast to improve the strength of the column 301.

[0041] Detailed Implementation Method Four: See [link] Figure 7 As shown, the lower connecting plate 2 of this embodiment has a disassembly groove 201 through which the stop block 304 can pass.

[0042] Furthermore, the disassembly groove 201 is a through groove, which is opened at the round hole of the lower connecting plate 2. The outline of the disassembly groove 201 is the same as that of the stop block 304, so that the stop block 304 can pass through and the lower connecting plate 2 can be disassembled.

[0043] Specific implementation method five: See Figure 5-6 As shown, the eccentric device 303 in this embodiment is an eccentric cylinder.

[0044] Specific implementation method six: See Figure 5-6 As shown, the eccentric device 303 in this embodiment is a cam.

[0045] Furthermore, eccentric cylinders or cams are provided on the left and right sides of the rotating shaft 302, both of which can achieve the function of tightening the column 301.

[0046] Detailed implementation method seven: See Figure 5-6 As shown, the distal end of the eccentric device 303 in this embodiment is provided with a handle 305.

[0047] Furthermore, the plane where the handle 305 is located is tangent to the distal end of the eccentric device 303. When the handle 305 is rotated to coincide with the upper end surface of the upper connecting plate 1, the distal end of the eccentric device 303 acts on the upper end surface of the upper connecting plate 1. The handle 305 is used to increase the torque of the rotating eccentric device 303, making it easier to manually operate the rotating eccentric device 303.

[0048] Detailed Implementation Method Eight: See also Figure 1-4 As shown, the upper end of the upper connecting plate 1 in this embodiment is provided with an anti-detachment baffle 7 that can restrict the handle 305 from flipping.

[0049] Furthermore, the anti-slip baffle 7 can accommodate the handle 305, preventing the handle 305 from flipping around the pivot 302 and causing the eccentric device 303 to loosen. The anti-slip baffle 7 is a fixed structure, and the handle 305 is screwed into the anti-slip baffle 7 to complete the limiting of the handle 305.

[0050] Detailed implementation method nine: See Figure 8 As shown, the anti-detachment baffle 7 in this embodiment is provided with a limiting protrusion 8.

[0051] Furthermore, the limiting protrusion 8 serves to prevent the handle 305 from rotating around the column 301.

[0052] Detailed Implementation Method Ten: See [link] Figure 7 As shown, the bottom of the lower connecting plate 2 in this embodiment is provided with a fan-shaped groove 202, and the stop block 304 is rotatably connected in the fan-shaped groove 202.

[0053] Furthermore, the sector-shaped groove 202 provides rotation space for the stop block 304 and limits the rotation angle of the stop block 304, preventing the lower connecting plate 2 from falling off due to vibration causing the stop block 304 to rotate to coincide with the disassembly groove 201. The sector-shaped groove 202 can hold the stop block 304 at the bottom of the lower connecting plate 2, preventing damage to the stop block 304 due to impact.

[0054] In use, the three-ring chain 5 and the wire rope ring 6 are respectively placed on the hollow columns 4 on the left and right sides. The stop block 304 is passed through the lower connecting plate 2 and embedded in the fan-shaped groove 202. The handle 305 is flipped so that the distal end of the eccentric device 303 presses against the upper connecting plate 1. Finally, the handle 305 is screwed into the anti-detachment baffle 7 to lock the lower connecting plate 2.

[0055] During disassembly, unscrew the handle 305 from the anti-detachment baffle 7, and flip the handle 305 so that the proximal end of the eccentric device 303 is close to the upper connecting plate 1. Rotate the column 301 to pull the column 301 out from the lower connecting plate 2, thus completing the removal of the lower connecting plate 2.

[0056] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions 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 this utility model.

Claims

1. A three-ring chain with an easily replaceable hook for mining cars, characterized in that: It includes an upper connecting plate (1), a lower connecting plate (2), a tightening device (3), a hollow column (4), a three-ring chain (5), and a wire rope loop (6); The upper connecting plate (1) and the lower connecting plate (2) are supported by two hollow columns (4). Two tightening devices (3) pass through the upper connecting plate (1), the hollow column (4) and the lower connecting plate (2) in sequence. The tightening devices (3) are used to push the upper connecting plate (1) and the lower connecting plate (2) to move closer to each other. A three-ring chain (5) is fitted on the hollow column (4) at the left end, and a wire rope ring cable (6) is fitted on the hollow column (4) at the right end.

2. The easily replaceable three-ring chain for mine cars according to claim 1, characterized in that: The tightening device (3) includes a column (301), an eccentric device (303), and a stop (304). The column (301) passes through the upper connecting plate (1), the hollow column (4) and the lower connecting plate (2) in sequence. The upper end of the column (301) is rotatably connected to the shaft (302). The two sides of the shaft (302) are fixed with eccentric devices (303). The eccentric devices (303) abut against the upper end face of the upper connecting plate (1). The bottom of the column (301) is provided with a stop block (304). The stop block (304) abuts against the lower end face of the lower connecting plate (2).

3. The easily replaceable three-ring chain for mine cars according to claim 2, characterized in that: The column (301) and the stop (304) are integrally formed.

4. The easily replaceable three-ring chain for mine cars according to claim 2, characterized in that: The lower connecting plate (2) has a disassembly groove (201) through which the stop block (304) can pass.

5. The easily replaceable three-ring chain for mine cars according to claim 2, characterized in that: The eccentric device (303) is an eccentric cylinder.

6. The easily replaceable three-ring chain for mine cars according to claim 2, characterized in that: The eccentric device (303) is a cam.

7. The easily replaceable three-ring chain for mine cars according to claim 2, characterized in that: The distal end of the eccentric device (303) is provided with a handle (305).

8. The easily replaceable three-ring chain for mine cars according to claim 7, characterized in that: The upper end of the upper connecting plate (1) is provided with an anti-detachment baffle (7) that can prevent the handle (305) from flipping.

9. The easily replaceable three-ring chain for mine cars according to claim 8, characterized in that: The anti-detachment baffle (7) is provided with a limiting protrusion (8).

10. The easily replaceable three-ring chain for mine cars according to claim 2, characterized in that: The bottom of the lower connecting plate (2) is provided with a fan-shaped groove (202), and the stop block (304) is rotatably connected in the fan-shaped groove (202).

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