Pin-falling-preventing mine car bolt structure and mine car
By introducing upper and lower stop sections to limit movement in the mine car pin structure, combined with a movable column linkage structure, the problem of the mine car pin falling off under vibration is solved, achieving a combination of safety and convenient operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TAIYUAN GENGYANG IND GROUP CO LTD
- Filing Date
- 2026-03-16
- Publication Date
- 2026-04-28
AI Technical Summary
Traditional mine car pin structures are prone to detachment under vibration and impact, causing the mine car to come off the hook. Furthermore, existing anti-detachment measures are cumbersome and difficult to operate.
The pin is limited by an upper stop and several lower stops. The extension and retraction of the lower stops are controlled by a movable column and a linkage structure. The pin can be easily installed and removed by operating a handle.
It effectively prevents pins from falling off, improves the safety of mine car operation, simplifies the loading and unloading process of pins, ensures that pins are not easily lost, and enhances ease of use.
Smart Images
Figure CN121929205A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of auxiliary structures for mining cars, and in particular to a pin structure for preventing pin detachment in mining cars and a mining car. Background Technology
[0002] As the core equipment for mine production and transportation, the reliability of the connecting device of the mine car is directly related to the safety and efficiency of underground material transportation. In mining environments such as coal mines, mine cars need to be frequently grouped and run in complex roadways. When moving, the mine cars need to withstand continuous vibration, impact and multi-directional stress. The traditional mine car pin structure is generally a simple column with an outer edge on the top. When in use, the column is directly inserted into the corresponding pin hole. The outer edge on the top of the column supports the column to prevent it from passing directly through the pin hole and falling off. The pin of this structure does not effectively limit its bottom. During the transportation of the mine car, the column is easy to fall off due to vibration, causing the mine car to decouple, which is quite dangerous. At the same time, the fallen column is not easy to find and needs to be purchased or made as a new pin.
[0003] To prevent the pin from falling off, in some cases, the bottom of the pin is fitted with a bolt, spring clip, or other structure. However, this makes the disassembly and assembly of the pin more complicated, time-consuming, and difficult to operate. Summary of the Invention
[0004] This invention provides a mine car pin structure and a mine car for preventing pin detachment, which can effectively solve the problems in the background art.
[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A mine car pin structure for preventing pin detachment includes a pin post, an upper stop located on the upper side of the pin post, a plurality of lower stops located on the lower side of the pin post, and a movable post that slides through the top of the pin post. The upper stop is used to limit the upper part of the pin, and the lower stop is slidably inserted into or extended from the pin in the radial direction. The lower stop is used to limit the lower part of the pin, and the movable column controls the movement of the lower stop through a linkage structure set in the pin. A handle is provided on the movable column.
[0006] In some embodiments of the present invention, a plurality of the lower stops are distributed around the circumference of the pin; The upper and lower sides of the pin are hollow and solid parts, respectively. The outer wall of the solid part is provided with a number of insertion holes that cooperate with each of the lower stops. Each insertion hole is provided with a through groove that communicates with the hollow part inside the pin. The through groove at least partially overlaps with the corresponding insertion hole. A groove is provided on the end face of the lower stop body facing the axis of the pin; The linkage structure consists of several movable rods that slide vertically within the hollow portion of the pin. The ends of the movable rods slide through the corresponding through grooves and cooperate with the corresponding ramp grooves.
[0007] In some embodiments of the present invention, ear grooves are provided on both sides of each of the insertion holes in the circumferential direction of the pin, and each ear groove is provided with an ear plate and a spring for connecting the pin and the lower stop.
[0008] In some embodiments of the present invention, the linkage structure further includes a push post disposed on each of the movable rods and an elastic rocker plate disposed inside the hollow part of the pin post. The lower side of the elastic rocker plate is inclined toward the axis of the pin post, and the lower side of the elastic rocker plate is provided with a U-shaped storage groove that cooperates with the push post.
[0009] In some embodiments of the present invention, the end of the U-shaped storage groove extends toward the axis of the pin with an extended hook groove.
[0010] In some embodiments of the present invention, a plurality of T-shaped grooves along the axis of the pin are provided on the inner wall of the hollow part of the pin, the top of each T-shaped groove extends to the top of the pin, the movable rod is provided with a T-shaped strip that cooperates with the T-shaped groove, and the bottom of the movable rod is provided with a pressing wheel.
[0011] In some embodiments of the present invention, at least a portion of each of the T-slots is provided with a notch, the top of the notch extending to the top of the pin; The upper stop includes a ring sleeved on the outer wall of the pin, a plurality of protrusions located in the ring and slidably disposed in each of the T-shaped grooves through a plurality of notches, and a stop edge located on the outer wall of the ring. The ring is adjustablely disposed on the pin by a set screw.
[0012] In some embodiments of the present invention, a sealing ring is coaxially provided at the top of the pin.
[0013] In some embodiments of the present invention, a plurality of multi-leg brackets are provided in the hollow part of the pin, and each end of the multi-leg brackets is fixed to the pin by fastening bolts.
[0014] A mining car includes a bucket, track wheels disposed at the bottom of the bucket, connectors disposed at the front and rear sides of the bucket, and a mining car pin structure as described above, wherein the mining car pin structure is used in conjunction with the connectors.
[0015] The technical solution of this invention can achieve the following technical effects: By using an upper stop and several lower stops to limit the upper and lower sides of the pin, the pin can be easily locked in the pin hole, thus preventing the pin from coming off during mine car operation, improving the safety of mine car use, and preventing the pin from being lost, allowing the pin to be used for a long time. By pressing or lifting the movable column located at the top of the pin, the extension and retraction of several lower stops on the bottom side of the pin can be directly controlled, which makes it convenient for workers to disassemble and assemble the pin, improving the ease of use. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 A schematic diagram of the exploded structure; Figure 3 This is a schematic diagram of the pin structure in an embodiment of the present invention; Figure 4 yes Figure 3 Top view of the structure; Figure 5 This is a schematic diagram of the cross-sectional structure of the pin in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the lower baffle in an embodiment of the present invention; Figure 7 yes Figure 3 A magnified view of the structure at point A in the middle; Figure 8 This is a schematic diagram of the structure of the elastic rocker in an embodiment of the present invention; Figure 9 This is a schematic diagram of the movable column and its structure in an embodiment of the present invention; Figure 10 This is a schematic diagram of the upper stop in an embodiment of the present invention.
[0018] Figure label: 100. Pin; 101. Insertion hole; 102. Through groove; 103. Ear groove; 104. T-slot; 105. Notch; 200. Upper stop; 201. Ring body; 202. Protrusion; 203. Stop edge; 300. Lower stop body; 301. Slope; 302. Ear plate; 303. Spring; 400. Movable column; 401. Handle; 402. Movable rod; 403. Push column; 404. Flexible rocker; 405. U-shaped storage slot; 406. Extension hook slot; 407. T-shaped strip; 408. Extrusion wheel; 500, sealing ring; 600. Multi-legged tripod; 601. Fastening bolt. Detailed Implementation
[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0020] Unless otherwise defined, 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. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0021] like Figures 1 to 2 As shown, a mine car pin structure for preventing pin detachment according to the present invention includes a pin 100, an upper stop 200 located on the upper side of the pin 100, a plurality of lower stops 300 located on the lower side of the pin 100, and a movable pin 400 that slides through the top of the pin 100. The upper stop 200 is used to limit the upper part of the pin 100, and the lower stop 300 is slidably inserted into or extended from the pin 100 in the radial direction. The lower stop 300 is used to limit the lower part of the pin 100, and the movable column 400 controls the movement of the lower stop 300 through a linkage structure provided in the pin 100. A handle 401 is provided on the movable column 400.
[0022] When in use, the pin 100 is vertically inserted into the corresponding pin hole, serving as the main body connecting to the mine car. The upper stop 200 is installed on the upper side or top of the pin 100. When the pin 100 is inserted into the corresponding pin hole, the upper stop 200 supports the pin 100 to prevent it from passing through the pin hole and falling downwards. Several lower stops 300 are located below the pin 100. When the lower stops 300 extend beyond the pin 100, they limit the bottom of the pin 100, preventing it from moving upwards and causing it to disengage. The upper stop 200 and the lower stop 300 confine the pin 100 within the pin hole, achieving a stable connection for the mine car. The pin 100 has an opening at the top, and the movable column 400 can be slidably installed within the opening. The up-and-down movement of the movable column 400 can be controlled by a linkage structure to move several lower stops 300. Thus, the pin 100 can be disassembled and assembled simply by having the worker stand and operate the movable column 400. Of course, to facilitate worker operation, a handle 401 is provided at the top of the movable column 400. The handle 401 can be installed on the movable column 400 by screwing it on.
[0023] During assembly, the worker first controls the movable column 400 to move on the pin 100 using the handle 401, causing several lower stops 300 to retract into the pin 100. Then, the pin 100 is passed through the pin hole, and the upper stop 200 contacts the top of the pin hole and lifts the pin 100. Several lower stops 300 are located at the bottom of the pin hole. Afterward, the worker presses the handle 401 to extend several lower stops 300 onto the pin 100. At this time, the lower stops 300 limit the bottom of the pin hole, thereby locking the pin 100 to the pin hole. When it is necessary to disassemble the pin 100, the worker only needs to lift the handle 401 to move the movable column 400 upward within the pin 100. The movable column 400, through the linkage mechanism, drives several lower stops 300 to slide back into the pin 100, thereby removing the limit at the bottom of the pin hole, making it convenient to directly pull out the pin 100.
[0024] By using an upper stop 200 and several lower stops 300 to limit the upper and lower sides of the pin 100, the pin 100 can be easily locked in the pin hole, thereby preventing the pin from coming off during the operation of the mine car, improving the safety of the mine car, and preventing the pin 100 from being lost, so that the pin 100 can be used for a long time. By pressing or lifting the movable column 400 located at the top of the pin 100, the extension and retraction movement of several lower stops 300 on the lower side of the pin 100 can be directly controlled, thereby making it convenient for workers to disassemble and assemble the pin 100 and improving the ease of use.
[0025] Optimized from the above implementation, such as Figures 2 to 7 As shown, several of the lower stops 300 are distributed around the pin 100 in the circumferential direction; The upper and lower sides of the pin 100 are hollow and solid parts, respectively. The outer wall of the solid part is provided with a plurality of insertion holes 101 that cooperate with each of the lower stops 300. Each insertion hole 101 is provided with a through groove 102 that communicates with the hollow part inside the pin 100. The through groove 102 overlaps at least partially with the corresponding insertion hole 101. The lower stop 300 has a groove 301 on the end face facing the axis of the pin 100; The linkage structure consists of several movable rods 402 that slide vertically within the hollow portion of the pin 100. The ends of the movable rods 402 slide through the corresponding through grooves 102 and cooperate with the corresponding ramp grooves 301.
[0026] The number of lower stops 300 is at least two, which makes the force on the pin 100 more even, and the circumferential distribution facilitates the even distribution of the insertion holes 101 and the movable rods 402 on the pin 100, thus simplifying processing. Since the lower stops 300 need to move radially on the pin 100, insertion holes 101 need to be made in the solid part on the lower side of the pin 100 to provide a longer guiding and supporting function for the lower stops 300. The hollow part on the upper side of the pin 100 can be used to install the movable rods 402 and several movable rods 402. The movable rod 402; the lower stop 300 is slidably inserted into the insertion hole 101. The groove 301 on the lower stop 300 matches the through groove 102. In this way, only a part of the lower stop 300 is used to make the groove 301, without interfering with the overall sliding of the lower stop 300 and its cooperation with the insertion hole 101. When the movable column 400 moves, it can directly push the movable rod 402 through the through groove 102 and squeeze the groove 301, so that the lower stop 300 slides outward in the insertion hole 101, thereby controlling the position of the lower stop 300.
[0027] Based on the above implementation, such as Figures 6 to 7 As shown, ear grooves 103 are provided on both sides of each of the insertion holes 101 in the circumferential direction of the pin 100, and each ear groove 103 is provided with an ear plate 302 and a spring 303 for connecting the pin 100 and the lower stop 300.
[0028] The ear plate 302 is fixed to the side wall of the lower stop 300. The ear plate 302 is connected to the inner wall of the ear groove 103 through the spring 303. When the movable rod 402 pushes the lower stop 300 outward through the groove 301, the spring 303 undergoes elastic deformation. When the movable column 400 moves upward and resets, the spring 303 pulls the lower stop 300 back to its original position, thereby controlling the reciprocating motion of the lower stop 300. To avoid the ear groove 103 interfering with the sliding of the lower stop 300 in the socket 101, the diameter of the ear groove 103 is smaller than that of the socket 101.
[0029] Based on the above implementation, such as Figure 5 , Figure 8 and Figure 9 As shown, the linkage structure also includes push pins 403 disposed on each of the movable rods 402 and elastic rocker plates 404 disposed inside the hollow part of the pin 100. The lower side of the elastic rocker plate 404 is inclined toward the axis of the pin 100, and the lower side of the elastic rocker plate 404 is provided with a U-shaped storage groove 405 that cooperates with the push pin 403.
[0030] The top of the elastic rocker arm 404 is fixed to the inner wall of the hollow part of the pin 100. The entire elastic rocker arm 404 is inclined towards the axis of the pin 100. Thus, when the elastic rocker arm 404 is compressed and undergoes elastic deformation, it provides an elastic force towards the axis of the pin 100. Specifically, in its natural state, the pusher 403 contacts the inclined part of the elastic rocker arm 404. At this time, due to its inclination, the elastic rocker arm 404 provides an elastic thrust in the inclined direction to the pusher 403, causing the pusher 403 and the movable column 400 to tend to move upwards. When it is necessary to control the extension of the lower stop 300, the movable column 400 is pressed, and the pusher 403 moves downwards simultaneously. The pusher 403 compresses the elastic rocker arm 404, causing it to undergo elastic deformation. The end of the movable rod 402 presses and pushes the lower stop 300. When the push post 403 moves to the position of the U-shaped storage groove 405, the push post 403 is inserted into the U-shaped storage groove 405, and the elasticity of the elastic rocker 404 keeps this inserted state stable, thereby keeping the movable rod 402 in the state of pushing the lower stop 300 out, and the pin 100 in the locked state. When the pin 100 is removed, the movable post 400 is lifted, thereby causing the push post 403 to disengage from the U-shaped storage groove 405. The inclined part of the elastic rocker 404 pushes the push post 403 back to its original position, thereby resetting the lower stop 300. Using the above structure, the locking operation of the lower stop 300 in both the extension and retraction states can be realized, thereby preventing the movable post 400 from moving arbitrarily.
[0031] In actual use, workers only need to move the overall structure through the handle 401 and pass it through the pin hole, and then press the elastic rocker 404 to complete the assembly work. When disassembling, workers only need to lift the handle 401 to retract and reset the lower stop 300, and directly drive the lower stop 300 to move up and get out of the pin hole. The operation is quite convenient.
[0032] Optimized from the above implementation, such as Figure 8As shown, when the worker presses the handle 401, due to the large pressing force, the push rod 403 is prone to continue moving downward and disengaging from the U-shaped storage groove 405 when it moves to the position of the U-shaped storage groove 405. At this time, the elastic rocker 404 is completely separated from the push rod 403. Even if the push rod 403 moves upward again, it cannot form a working state again. Moreover, this phenomenon can easily cause the lower stop 300 to completely exit from the insertion hole 101, resulting in the lower stop 300 disengaging. To avoid this phenomenon, the end of the U-shaped storage groove 405 extends towards the axis of the pin 100 with an extension hook groove 406. The extension hook groove 406 can be used to form a barbed limit on the push rod 403, so that the push rod 403 cannot move downward when it moves to the position of the U-shaped storage groove 405.
[0033] Optimized from the above implementation, such as Figure 5 and Figure 9 As shown, the inner wall of the hollow part of the pin 100 is provided with a plurality of T-shaped grooves 104 along the axial direction of the pin 100. The top of each T-shaped groove 104 extends to the top of the pin 100. The movable rod 402 is provided with a T-shaped strip 407 that cooperates with the T-shaped grooves 104. The bottom of the movable rod 402 is provided with a pressing wheel 408.
[0034] Since the T-slot 104 extends to the top of the pin 100, during assembly, the T-shaped strip 407 on the movable rod 402 can be slid into the T-slot 104 from the top of the pin 100. This assembly method is simple and the overall structure has high connection strength. The extrusion wheel 408 on the movable rod 402 can be used in conjunction with the ramp 301 to reduce the friction between the ramp 301 and the movable rod 402.
[0035] Optimized from the above implementation, such as Figure 5 and Figure 10 As shown, at least a portion of each of the T-slots 104 is provided with a notch 105, the top of the notch 105 extending to the top of the pin 100; The upper stop 200 includes a ring 201 sleeved on the outer wall of the pin 100, a plurality of protrusions 202 located inside the ring 201 and slidably disposed in each of the T-shaped grooves 104 through a plurality of notches 105, and a stop 203 located on the outer wall of the ring 201. The ring 201 is adjustablely disposed on the pin 100 by a set screw.
[0036] The protrusion 202 on the upper stop 200 can be slidably installed in the T-slot 104 through the notch 105, thereby allowing the upper stop 200 and the movable rod 402 to share the T-slot 104, which facilitates processing and assembly; the notch 105 can limit the sliding position of the T-shaped strip 407 in the T-slot 104, thereby limiting the upward movement position of the movable rod 402 in the pin 100, and facilitating the limiting of the upward movement position of the movable pin 400; the retaining edge 203 can limit the upper side of the pin 100, thereby enabling it to cooperate with the lower stop 300 to control the pin 100. Limiting positions are provided on both the upper and lower sides. Since the ring 201 can move on the outer wall of the pin 100, the distance between the stop 203 and the lower stop 300 can be adjusted, making it convenient for the pin 100 to be used with pin holes of different heights. This avoids a situation where, when the pin hole height is small, the distance between the stop 203 and the lower stop 300 is large, resulting in a large range of motion of the pin 100 within the pin hole, which would cause the pin 100 to move arbitrarily and affect the stability of the pin 100 connection. At the same time, the adjustable setting of the upper stop 200 can also adjust the upward limiting position of the movable rod 402 and the movable pin 400.
[0037] Optimized from the above implementation, such as Figure 1 and Figure 2 As shown, since the T-groove 104 extends upward to the top of the pin 100, the top of the pin 100 is split, resulting in low overall strength. When the pin 100 is subjected to a large force, this position of the pin 100 and the T-groove 104 are prone to deformation, causing the T-shaped strip 407 to get stuck in the T-groove 104. To avoid this phenomenon, a sealing ring 500 is coaxially provided on the top of the pin 100. The sealing ring 500 can improve the integrity and strength of the top of the pin 100, and can also seal the opening at the top of the T-groove 104, thereby preventing the upper stop 200 from falling off.
[0038] Optimized from the above implementation, such as Figure 4 As shown, since the pin 100 has a hollow interior, to prevent the pin 100 from collapsing under heavy load, several multi-leg brackets 600 are installed inside the hollow interior of the pin 100, and each end of the multi-leg brackets 600 is fixed to the pin 100 by fastening bolts 601. The use of multiple multi-leg brackets 600 can improve the overall strength of the pin 100, and this arrangement will not cause the multi-leg brackets 600 to interfere with the movement of the internal structures of the pin 100. The fastening bolts 601 can be directly connected to the multi-leg brackets 600 from the outside, and the assembly method is simple and convenient to operate.
[0039] A mining car includes a bucket, track wheels disposed at the bottom of the bucket, connectors disposed at the front and rear sides of the bucket, and a mining car pin structure as described above, wherein the mining car pin structure is used in conjunction with the connectors.
[0040] Using connectors and pins, multiple mine cars can be connected. The buckets on the mine cars can be used to hold coal or other minerals, and the track wheels at the bottom of the buckets can move on tracks in the tunnel.
[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. A mine car pin structure for preventing pin detachment, characterized in that, It includes a pin, an upper stop located on the upper side of the pin, several lower stops located on the lower side of the pin, and a movable column that slides through the top of the pin; The upper stop is used to limit the upper part of the pin, and the lower stop is slidably inserted into or extended from the pin in the radial direction. The lower stop is used to limit the lower part of the pin, and the movable column controls the movement of the lower stop through a linkage structure set in the pin. A handle is provided on the movable column.
2. The anti-detachment pin structure for mine cars according to claim 1, characterized in that, Several of the lower stops are distributed around the pin in the circumferential direction; The upper and lower sides of the pin are hollow and solid parts, respectively. The outer wall of the solid part is provided with a number of insertion holes that cooperate with each of the lower stops. Each insertion hole is provided with a through groove that communicates with the hollow part inside the pin. The through groove at least partially overlaps with the corresponding insertion hole. A groove is provided on the end face of the lower stop body facing the axis of the pin; The linkage structure consists of several movable rods that slide vertically within the hollow portion of the pin. The ends of the movable rods slide through the corresponding through grooves and cooperate with the corresponding ramp grooves.
3. The anti-detachment pin structure for mine cars according to claim 2, characterized in that, Each of the two side walls of the insertion hole in the circumferential direction of the pin is provided with an ear groove, and each ear groove is provided with an ear plate and a spring for connecting the pin and the lower stop.
4. The anti-detachment pin structure for mine cars according to claim 2, characterized in that, The linkage structure also includes push pins disposed on each of the movable rods and elastic rocker plates disposed inside the hollow part of the pin. The lower side of the elastic rocker plate is inclined toward the axis of the pin, and the lower side of the elastic rocker plate is provided with a U-shaped storage groove that cooperates with the push pin.
5. The anti-detachment pin structure for a mine car according to claim 4, characterized in that, The end of the U-shaped storage groove extends toward the axis of the pin and has an extension hook groove.
6. The anti-detachment pin structure for a mine car according to claim 2, characterized in that, The inner wall of the hollow part of the pin is provided with several T-shaped grooves along the axis of the pin. The top of each T-shaped groove extends to the top of the pin. The movable rod is provided with a T-shaped strip that cooperates with the T-shaped grooves. The bottom of the movable rod is provided with a pressing wheel.
7. The anti-detachment pin structure for a mine car according to claim 6, characterized in that, At least a portion of each of the T-slots is provided with a notch, the top of which extends to the top of the pin; The upper stop includes a ring sleeved on the outer wall of the pin, a plurality of protrusions located in the ring and slidably disposed in each of the T-shaped grooves through a plurality of notches, and a stop edge located on the outer wall of the ring. The ring is adjustablely disposed on the pin by a set screw.
8. The anti-detachment pin structure for a mine car according to claim 7, characterized in that, A sealing ring is coaxially provided at the top of the pin.
9. The anti-detachment pin structure for a mine car according to claim 1, characterized in that, The hollow part of the pin is provided with several multi-leg brackets, and each end of the multi-leg brackets is fixed to the pin by fastening bolts.
10. A mining car, characterized in that, The invention includes a car bucket, track wheels disposed at the bottom of the car bucket, connectors disposed at the front and rear sides of the car bucket, and a mine car pin structure for preventing pin detachment as described in any one of claims 1-9, wherein the mine car pin structure is used in conjunction with the connectors.