Three-ring chain for mine car
By designing components such as the connecting box and pin bracket for the three-ring chain of the mine car, the problem of lost pins was solved, and the fixing and disassembly of the pin and the connecting box were made convenient, supporting one-handed operation and improving the convenience of mine car connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEILONGJIANG SANCHEN HEAVY MASCH MFG CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-06-19
AI Technical Summary
Existing mine car fixing pins and three-ring chains or connectors are usually separate structures, which can easily lead to the loss of pins when connecting or repairing mine cars.
A three-ring chain for mining cars was designed, including components such as a connecting box, a pin, a pin bracket, a locking device, and a locking tongue. The pin and the connecting box are integrated into one structure. The pin is fixed and unlocked through the cooperation of the sliding handle, the locking groove, and the locking tongue. Combined with the pre-support function of the top column, it enables convenient fixing and disassembly with one hand.
It effectively prevents the pins from being lost during connection or maintenance, enabling convenient and efficient fixing and disassembly of the three-ring chain, supporting one-handed operation, and improving the ease of use of the connector box.
Smart Images
Figure CN224375592U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of mine car connecting devices, and in particular to a three-ring chain for mine cars. Background Technology
[0002] Mining cars are rail vehicles used in underground engineering projects such as mines and tunnels to transport ore, waste rock, coal, or other materials. They are one of the key pieces of equipment in underground transportation systems, and adjacent mine cars are connected by a three-ring chain. The three-ring chain is the core component of the mining car connection device, mainly used to connect mining cars in series or to connect mining cars to the traction locomotive to form a complete transport train. It consists of three nested metal links, usually forged or welded from high-strength alloy steel, possessing extremely high tensile strength and impact resistance, capable of withstanding frequent traction forces, vibrations, and instantaneous impacts under complex underground working conditions. The two ends of the three-ring chain are fixed to the mining car connector by pins or hooks, forming a flexible connection. When connecting mining cars, the three-ring chain is placed in the mining car connector, the pin is inserted into the connector and passes through the three-ring chain, and finally, the pin is axially fixed using a fixing pin to complete the mining car connection.
[0003] However, the existing mine car fixing pins and three-ring chains or connectors are usually separate structures. When connecting or repairing mine cars, the pins are usually removed. If the pins are not properly stored, they often lead to the problem of being lost. Utility Model Content
[0004] This invention addresses the problem that in existing three-ring chains, the fixing pin for the mine car and the three-ring chain or connector are usually separate structures. When connecting or repairing the mine car, the pin is often removed, and if the pin is not properly stored, it often leads to the loss of the pin. Therefore, this invention provides a three-ring chain for mine cars to solve the problems mentioned in the background art.
[0005] The technical solution of this utility model is:
[0006] A three-ring chain for a mining car includes a connecting box, a pin, and a three-ring chain. The pin passes through the connecting box and the three-ring chain to fix the three-ring chain inside the connecting box.
[0007] It also includes a pin bracket and a locking device. The upper end of the pin is provided with a sliding handle. The pin bracket is fixed to the upper end of the connecting box. The sliding handle is slidably connected in the pin bracket. The pin is provided with a locking groove. The locking device is fixed to the upper end of the connecting box. The locking device can be inserted into the locking groove to fix the pin.
[0008] Furthermore, a baffle is fixed on the pin bracket, a first U-shaped groove is provided at the upper end of the pin bracket, a second U-shaped groove is provided on the baffle, and the sliding handle is slidably connected in the first U-shaped groove and the second U-shaped groove.
[0009] Furthermore, the locking device includes a lock box, a latch, and a first spring. The lock box is fixed to the upper end of the connecting box, the latch is slidably connected inside the lock box, and the first spring is installed in the lock box. The first spring causes the latch to tend to move in the direction of the pin axis.
[0010] Furthermore, the lock box has a circular hole through which the bolt can pass.
[0011] Furthermore, the latch has an arc-shaped groove at one end near the pin, and a handle at the other end of the latch, which passes through the lock box.
[0012] Furthermore, a spring tube is provided at the lower end of the connecting box, a top post is slidably connected in the spring tube, a second spring is provided in the spring tube, the second spring causes the top post to have an upward tendency, and the lower end of the pin and the upper end of the top post are both set as hemispherical surfaces.
[0013] Furthermore, the hemisphere at the lower end of the pin is tangent to the hemisphere at the upper end of the top post, and the point of tangency is located on the center plane of the connecting box in the vertical direction.
[0014] Furthermore, a limiting part is provided at the upper end of the sliding handle.
[0015] Furthermore, a lifting ring is provided at the upper end of the limiting part.
[0016] Furthermore, the connecting box is provided with several fixing ears.
[0017] Compared with the prior art, the present invention has the following advantages:
[0018] 1. A three-ring chain for mining cars, wherein a pin bracket is provided at the upper end of the connecting box. The pin bracket is used to limit the pin, so that the pin can only slide up and down within the pin bracket, thereby completing the fixing and disconnection of the three-ring chain. This structure makes the pin and the connecting box an integrated structure, solving the problem of the pin being lost due to detachment when connecting or repairing mining cars.
[0019] 2. A sliding top post is connected in the connecting box. The upper end of the top post contacts the lower end of the pin. Both the lower end of the pin and the upper end of the top post are hemispherical, allowing the three-ring chain to push the pin and top post apart vertically when inserted into the connecting box, facilitating the installation of the three-ring chain. Furthermore, the contact between the pin and the top post in the connecting box provides pre-support for the three-ring chain, preventing it from falling out after release. Pressing down the pin then secures the three-ring chain. This allows for single-handed operation to secure the three-ring chain. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of the present invention. Figure I ;
[0021] Figure 2 This is a schematic diagram of the structure of the present invention. Figure II ;
[0022] Figure 3 This is a longitudinal sectional view of the connecting box and the latch;
[0023] Figure 4 This is the front view of the present invention;
[0024] Figure 5 An exploded view of the pin bracket;
[0025] Figure 6 This is a schematic diagram of the pin bracket structure;
[0026] Figure 7 This is a cross-sectional view of the locking device;
[0027] Figure 8 This is a schematic diagram of the pin structure;
[0028] Figure 9 This is a schematic diagram of the structure in the latched state.
[0029] In the diagram: 1. Connecting box; 101. Fixing ear; 201. Pin; 202. Sliding handle; 203. Locking groove; 204. Limiting part; 205. Lifting ring; 3. Three-ring chain; 401. Pin bracket; 402. Baffle; 403. First U-shaped groove; 404. Second U-shaped groove; 5. Locking device; 501. Lock box; 502. Lock tongue; 503. First spring; 504. Round hole; 505. Arc groove; 506. Pull handle; 601. Bourdon tube; 602. Top post; 603. Second spring. Detailed Implementation
[0030] Specific implementation method one: See Figure 1-4 As shown in Figures 8-9, a three-ring chain for a mining car is provided in this embodiment. The three-ring chain includes a connecting box 1, a pin 201 and a three-ring chain 3. The pin 201 passes through the connecting box 1 and the three-ring chain 3 and fixes the three-ring chain 3 inside the connecting box 1.
[0031] The feature is that it further includes a pin bracket 401 and a locking device 5. The upper end of the pin 201 is provided with a sliding handle 202. The pin bracket 401 is fixed to the upper end of the connecting box 1. The sliding handle 202 is slidably connected in the pin bracket 401. The pin 201 is provided with a locking groove 203. The locking device 5 is fixed to the upper end of the connecting box 1. The locking device 5 can be inserted into the locking groove 203 to fix the pin 201.
[0032] Furthermore, the connecting box 1 has a cuboid structure with an opening at its front end for inserting the three-ring chain 3. The rear end of the connecting box 1 is fixedly connected to the mine car by welding or bolts. Both the upper and lower surfaces of the connecting box 1 have through-holes for the pin 201 to pass through. The pin 201 is cylindrical and is used to bear the traction force of the three-ring chain 3. A sliding handle 202 is concentrically provided at the upper end of the pin 201. The diameter of the sliding handle 202 is smaller than that of the pin 201, and a limiting part 204 is provided at the top of the pin 201. The pin bracket 401 has an inverted U-shaped plate structure and is fixed to the upper end of the connecting box 1 by welding or bolts. The upper end of the pin bracket 401 has a horizontal section with a circular hole at its center. The diameter of this circular hole is the same as the outer diameter of the sliding handle 202, and the sliding handle 202 is slidably connected in the circular hole. The pin bracket 401 limits the movement of the pin 201. When the pin 201 moves upward to its maximum stroke, the horizontal part of the pin bracket 401 blocks the upper end face of the pin 201; when the pin 201 moves downward to its maximum stroke, the horizontal part of the pin bracket 401 blocks the lower end face of the limiting part 204. This prevents the pin 201 from coming out and solves the problem of the pin 201 being lost when connecting or repairing a mine car. A locking groove 203 is provided on the side wall of the pin 201. The locking groove 203 has a circular structure. A locking tongue can extend from the locking device 5 and insert into the locking groove 203 to complete the axial fixation of the pin 201.
[0033] Specific implementation method two: See Figure 5-6 As shown, in this embodiment, a baffle 402 is fixed on the pin bracket 401, a first U-shaped groove 403 is provided at the upper end of the pin bracket 401, a second U-shaped groove 404 is provided on the baffle 402, and the sliding handle 202 is slidably connected in the first U-shaped groove 403 and the second U-shaped groove 404.
[0034] Furthermore, the horizontal portion at the upper end of the pin bracket 401 is composed of the pin bracket 401 body and the baffle 402, with the baffle 402 fixed to the upper end of the pin bracket 401 by bolts. The second U-shaped groove 404 on the baffle 402 has an opening direction opposite to that of the first U-shaped groove 403 on the pin bracket 401, so that the overlapping portion of the first U-shaped groove 403 and the second U-shaped groove 404 forms a circular hole structure. The sliding handle 202 is slidably connected in the above-mentioned circular hole structure. During installation, the pin 201 is inserted into the connecting box 1, and the sliding handle 202 is embedded in the first U-shaped groove 403. The second U-shaped groove 404 in the baffle 402 is inserted into the sliding handle 202, and the baffle 402 is fixed to the pin bracket 401 by bolts, thus completing the installation of the pin 201. The above structure facilitates the installation of the pin 201.
[0035] Specific implementation method three: See Figure 7As shown, the locking device 5 of this embodiment includes a lock box 501, a lock tongue 502 and a first spring 503. The lock box 501 is fixed to the upper end of the connecting box 1, the lock tongue 502 is slidably connected in the lock box 501, and the first spring 503 is installed in the lock box 501. The first spring 503 causes the lock tongue 502 to have a tendency to move in the direction of the pin 201 axis.
[0036] Furthermore, in this embodiment, the lock box 501 is a box-shaped structure with a rounded left end and a square right end. A cavity is formed inside the lock box 501, and the locking tongue 502 is slidably connected within the cavity. A first spring 503 is disposed between the right end face of the locking tongue 502 and the right end face of the inner wall of the lock box 501, and the first spring 503 pushes the locking tongue 502 to the left. When the pin 201 is not locked, the locking tongue 502 abuts against the side wall of the pin 201; when the pin 201 is pressed down until the locking groove 203 coincides with the locking tongue 502, the locking tongue 502 is inserted into the locking groove 203, completing the locking of the pin 201.
[0037] Detailed Implementation Method Four: See [link] Figure 8 As shown, the lock box 501 of this embodiment has a circular hole 504 through which the pin 201 can pass.
[0038] Furthermore, the round hole 504 is used for the pin 201 to pass through the lock box 501. After the pin 201 passes through the lock box 501, the lock box 501 is a closed structure to prevent dust particles from entering the lock box 501 and causing the bolt 502 to get stuck.
[0039] Specific implementation method five: See Figure 7 As shown, in this embodiment, the locking tongue 502 is provided with an arc-shaped groove 505 at one end near the pin 201, and a pull handle 506 is provided at the other end of the locking tongue 502, which passes through the lock box 501.
[0040] Furthermore, the diameter of the arc-shaped groove 505 is the same as that of the locking groove 203, which increases the contact area between the upper end face of the latch 502 and the locking groove 203, thereby increasing the axial resistance after the pin 201 is locked. An opening is provided at the right end of the lock box 501 for the pull handle 506 to pass through, which is used to unlock the pin 201. In use, the pin 201 is gradually inserted downwards into the connecting box 1, and the latch 502 is automatically inserted into the locking groove 203 by the pushing force of the first spring 503, completing the locking of the pin 201; to unlock, the pull handle 506 is pulled to the right, and the pull handle 506 drives the latch 502 out of the locking groove 203, completing the unlocking of the pin 201.
[0041] Specific implementation method six: See Figure 9As shown, the lower end of the connecting box 1 in this embodiment is provided with a spring tube 601, a top post 602 is slidably connected in the spring tube 601, and a second spring 603 is provided in the spring tube 601. The second spring 603 causes the top post 602 to have an upward tendency. The lower end of the pin 201 and the upper end of the top post 602 are both set as hemispherical surfaces.
[0042] Detailed implementation method seven: See Figure 3-4 As shown, in this embodiment, the hemisphere at the lower end of the pin 201 is tangent to the hemisphere at the upper end of the top post 602, and the point of tangency is located on the center plane of the connecting box 1 in the vertical direction.
[0043] Furthermore, the spring tube 601 is a tubular structure with a closed bottom. The spring tube 601 is concentrically arranged with the pin 201 and is fixed to the lower end of the connecting box 1 by welding or bolts. The upper end of the top post 602 passes through the connecting box 1 and contacts the bottom of the pin 201. The second spring 603 inside the spring tube 601 pushes the top post 602 upward. Under the action of the second spring 603, when the pin 201 and the top post 602 are in a balanced state, the contact point between the pin 201 and the top post 602 is located on the vertical center plane of the connecting box 1. This structure is designed to push the upward pin 201 in the unlocked state, facilitating the insertion of the three-ring chain 3. The lower end of the pin 201 and the upper end of the top post 602 are both set as hemispherical surfaces, so that when the three-ring chain 3 is inserted into the connecting box 1, the three-ring chain 3 can push the pin 201 and the top post 602 to separate upward and downward respectively, facilitating the installation of the three-ring chain 3.
[0044] Furthermore, during the connection of mine cars in the mining area, workers need to use a handheld recorder to record the connection process. However, when connecting the three-ring chain, one hand must hold the three-ring chain 3, place it in the connection box 1, and the other hand must insert the pin 201 into the connection box 1 to fix the three-ring chain 3, making it impossible to use the recorder for continuous recording. In this device, the pin 201 in the connection box 1 contacts the top post 602, providing pre-support for the three-ring chain 3 inserted into the connection box 1 to prevent it from falling out after being released. Then, the pin 201 is pressed down to complete the fixation of the three-ring chain 3. This allows for single-handed operation to fix the three-ring chain 3.
[0045] Detailed Implementation Method Eight: See also Figure 8 As shown, the upper end of the sliding handle 202 in this embodiment is provided with a limiting part 204.
[0046] Furthermore, the limiting part 204 has a flat cylindrical structure, and the limiting part 204 plays a limiting role in the maximum formation of the pin 201 moving downward.
[0047] Detailed implementation method nine: See Figure 8As shown, a lifting ring 205 is provided at the upper end of the limiting part 204 in this embodiment.
[0048] Furthermore, a lifting ring 205 is provided to facilitate the user to lift the pin 201 upwards for maintenance.
[0049] Detailed Implementation Method Ten: See [link] Figure 1 As shown, the connecting box 1 in this embodiment is provided with several fixing ears 101. Bolts are passed through the fixing ears 101 to fix the connecting box 1 to the mine car.
[0050] In use, the three-ring chain 3 is inserted into the connecting box 1. The three-ring chain 3 can push the pin 201 and the top post 602 to separate upwards and downwards respectively. Pressing the pin 201 downwards pushes the top post 602 out of the connecting box 1 into the spring tube 601. The top post 602 moves downwards and compresses the second spring 603 until the locking tongue 502 is embedded in the locking groove 203, completing the locking of the pin 201. To disconnect the three-ring chain 3, pull the handle 506 to the right. The handle 506 drives the locking tongue 502 out of the locking groove 203, unlocking the pin 201. The second spring 603 extends and pushes the top post 602 and the pin 201 back to a balanced state, allowing the three-ring chain 3 to be pulled out, completing the disassembly of the three-ring chain 3. This utility model achieves convenient and efficient disassembly and fixing of the three-ring chain 3.
[0051] 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 for a mining car, comprising a connecting box (1), a pin (201) and a three-ring chain (3), wherein the pin (201) passes through the connecting box (1) and the three-ring chain (3), and the pin (201) fixes the three-ring chain (3) inside the connecting box (1); characterized in that It also includes a pin bracket (401) and a locking device (5). The upper end of the pin (201) is provided with a sliding handle (202). The pin bracket (401) is fixed to the upper end of the connecting box (1). The sliding handle (202) is slidably connected in the pin bracket (401). The pin (201) is provided with a locking groove (203). The locking device (5) is fixed to the upper end of the connecting box (1). The locking device (5) can be inserted into the locking groove (203) to fix the pin (201).
2. The triple-ring chain for mine cars according to claim 1, characterized in that: A baffle (402) is fixed on the pin bracket (401). A first U-shaped groove (403) is provided at the upper end of the pin bracket (401), and a second U-shaped groove (404) is provided on the baffle (402). The sliding handle (202) is slidably connected in the first U-shaped groove (403) and the second U-shaped groove (404).
3. The triple-ring chain for mine cars according to claim 1, characterized in that: The locking device (5) includes a lock box (501), a latch (502) and a first spring (503). The lock box (501) is fixed to the upper end of the connecting box (1). The latch (502) is slidably connected inside the lock box (501). The first spring (503) is installed in the lock box (501). The first spring (503) causes the latch (502) to have a tendency to move in the direction of the pin (201) axis.
4. The three-ring chain for mining cars according to claim 3, characterized in that: The lock box (501) has a round hole (504) through which the pin (201) can pass.
5. The three-ring chain for mining cars according to claim 3, characterized in that: The latch (502) has an arc-shaped groove (505) at one end near the pin (201), and a handle (506) is provided at the other end of the latch (502), which passes through the lock box (501).
6. The three-ring chain for mining cars according to claim 1, characterized in that: The lower end of the connecting box (1) is provided with a spring tube (601), and a top post (602) is slidably connected in the spring tube (601). A second spring (603) is provided in the spring tube (601), and the second spring (603) causes the top post (602) to have an upward tendency. The lower end of the pin (201) and the upper end of the top post (602) are both set as hemispherical surfaces.
7. The three-ring chain for mining cars according to claim 6, characterized in that: The lower hemisphere of the pin (201) is tangent to the upper hemisphere of the top post (602), and the point of tangency is located on the center plane of the connecting box (1) in the vertical direction.
8. The three-ring chain for mining cars according to claim 2, characterized in that: The upper end of the sliding handle (202) is provided with a limiting part (204).
9. The three-ring chain for mining cars according to claim 8, characterized in that: The upper end of the limiting part (204) is provided with a lifting ring (205).
10. The three-ring chain for mining cars according to claim 1, characterized in that: The connecting box (1) is provided with several fixing ears (101).