A hydraulic support stand column connecting bolt locking device
Patent Information
- Application Number
- CN202522466910.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-20
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-11-20
AI Technical Summary
[0003]综采工作面在正常生产过程中，液压支架需在推进采煤、移架让压等连续作业中频繁完成升降、前移与定架操作，长期处于强震动、高冲击和粉尘磨蚀环境下，立柱连接插销末端的闭锁卡箍因受力不均、疲劳松脱或煤岩挤压干扰而易发生脱落，使插销在未被有效闭锁的状态下处于自由滑移风险中，进一步在液压支架受采煤机割煤震动、液压系统瞬时冲击或支架结构相对摆动时出现插销自动退出现象，不仅导致支架铰接部位失稳、动作阻滞、立柱受力异常等故障增多，也加大现场检修、更换及重新对位插销的工作量，从而直接影响综采工作面设备可靠性和连续安全生产效率
[0008]与现有技术相比，本实用新型具有以下有益效果：通过在支架上设置可插接的插销，并使插销端部穿过支架后与液压立柱上预设的销孔可靠啮合形成承载限位，再由插接在支架上的限位杆横向插入插销实现二次锁固；当装置处于工作状态时，限位杆对插销的横向运动形成刚性阻隔，使插销在采煤震动、支架偏载、立柱伸缩冲击等极端工况下仍保持稳定定位，不会因闭锁卡箍松动、疲劳脱落等传统结构缺陷而自行滑脱；
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Figure CN224800338U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of hydraulic support technology, and specifically relates to a hydraulic support column connecting pin locking device. Background Technology
[0002] Hydraulic support column connecting pins are core connecting components used to reliably hinge and limit the position of support columns with key load-bearing components such as top beams, bases, or crossbeams. They are usually made of high-strength alloy steel and are quickly positioned and locked by inserting into the alignment holes of the support hinge ear plates. The limiting grooves, retaining rings, or cotter pins on the pins ensure stable force distribution. They provide a safe, detachable, and highly wear-resistant connection method during the periodic movement, lifting, and impact bearing of the support in the coal mining face, ensuring the coordinated movement and long-term reliable operation of the overall hydraulic support structure.
[0003] During normal production at a fully mechanized mining face, hydraulic supports frequently undergo lifting, forward movement, and positioning operations during continuous operations such as coal advance and support shifting. These supports are subjected to prolonged exposure to strong vibrations, high impacts, and dust abrasion. The locking clamps at the ends of the column connecting pins are prone to detachment due to uneven stress, fatigue loosening, or interference from coal and rock compression. This leaves the pins at risk of free slippage when not effectively locked. Furthermore, when the hydraulic supports are subjected to vibrations from the coal cutting machine, instantaneous impacts on the hydraulic system, or relative swaying of the support structure, the pins may automatically disengage. This not only increases the likelihood of instability at the support hinges, sluggish movement, and abnormal column stress, but also increases the workload of on-site maintenance, replacement, and repositioning of the pins, directly impacting the reliability of the fully mechanized mining face equipment and the efficiency of continuous safe production. Utility Model Content
[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a hydraulic support column connection pin locking device.
[0005] To achieve the above objectives, this utility model provides a hydraulic support column connection pin locking device, including a support and a pin. The pin is inserted and installed on the support, and the end of the pin passes through the support and is used to insert into a pin hole opened on the hydraulic column to achieve a limiting action. A limiting rod is inserted and installed on the support and is inserted into the pin to limit the lateral movement of the pin.
[0006] In the above technical solution, the limiting rod further includes a plug inserted into the bracket, and the pin is inserted into one side of the plug.
[0007] In the above technical solution, the insertion rod has a thread on the side away from the pin for screwing into the bracket. In the above technical solution, the end of the insertion rod away from the pin is fixedly connected to a second limiting cap through the bracket. The second limiting cap contacts the outer wall of the bracket. A torsion ring is rotatably installed on the outside of the second limiting cap. The torsion ring is used to rotate the second limiting cap and even the insertion rod. In the above technical solution, the pin further includes a pin rod that is inserted and installed on the bracket. The pin rod is used for a pin hole. A notched retaining ring is inserted and installed in an annular groove opened outside the pin hole. The notched retaining ring fits against the outer wall of the bracket on the side away from the hydraulic column to perform a limiting action. In the above technical solution, the pin is further provided with a socket, the pin is inserted into the socket to perform a limiting action, and the two ends of the pin are screwed with first limiting caps to prevent the pin from slipping off.
[0008] Compared with the prior art, the present invention has the following advantages: by setting a pluggable pin on the support, and making the end of the pin pass through the support and reliably engage with the pin hole preset on the hydraulic column to form a load-bearing limit, and then the limit rod inserted on the support is inserted laterally into the pin to achieve secondary locking; when the device is in working state, the limit rod forms a rigid barrier to the lateral movement of the pin, so that the pin remains stably positioned under extreme working conditions such as coal mining vibration, support off-center load, and column extension and contraction impact, and will not slip off on its own due to traditional structural defects such as loosening of locking clamps and fatigue falling off; By mechanically locking the pin and the support, a reliable "through-type locking pin" function is added to the pin body, making the connection point resistant to earthquakes, impacts, and loosening, thus fundamentally solving the problems of pin detachment, loosening of hinges, and frequent support failures in fully mechanized mining faces. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the overall structure proposed in this utility model; Figure 2 This is a schematic diagram of the pin structure proposed in this utility model; Figure 3 This is a schematic diagram of the support structure proposed in this utility model; Figure 4 This is a schematic diagram of the hydraulic column structure proposed in this utility model.
[0010] In the diagram: 1. Pin; 2. Limiting rod; 3. Bracket; 4. Hydraulic column; 5. Notched retaining ring; 6. Pin hole; 101. Pin; 102. First limit cap; 103. Insertion hole; 104. Annular groove; 201. Insert rod; 202. Thread; 203. Second limit cap; 204. Torsion ring. Detailed Implementation To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0011] like Figures 1-4 The hydraulic support column connecting pin locking device shown includes a support 3 and a pin 1. The pin 1 is inserted and installed on the support 3, and the end of the pin 1 passes through the support 3 and is used to insert into the pin hole 6 opened on the hydraulic column 4 to achieve a limiting action; the limiting rod 2 is inserted and installed on the support 3 and is inserted into the pin 1 to limit the lateral movement of the pin 1.
[0012] The above-mentioned hydraulic support 3 column connecting pin 1 locking device is provided on the support 3 with an insertable pin 1, and the end of the pin 1 passes through the support 3 and reliably engages with the pin hole 6 on the hydraulic column 4 to form a bearing limit, and then the limit rod 2 inserted on the support 3 is inserted laterally into the pin 1 to achieve secondary locking. When the device is in operation, the limit rod 2 forms a rigid barrier to the lateral movement of the pin 1, so that the pin 1 remains stably positioned under extreme working conditions such as coal mining vibration, support 3 off-center load, and column extension and contraction impact, and will not slip off on its own due to traditional structural defects such as loosening of the locking clamp or fatigue falling off.
[0013] In this embodiment, the limiting rod 2 includes a rod 201 inserted into the bracket 3. A pin 1 is inserted into one side of the rod 201. A thread 202 is opened on the side of the rod 201 away from the pin 1 for screwing into the bracket 3. A second limiting cap 203 is fixedly connected to the end of the rod 201 away from the pin 1 through the bracket 3. The second limiting cap 203 contacts the outer wall of the bracket 3. A torsion ring 204 is rotatably installed on the outside of the second limiting cap 203. The torsion ring 204 is used to rotate the second limiting cap 203 and even the rod 201. The limiting rod 2 is inserted into the bracket 3 via the insert rod 201 and is screwed to the bracket 3 by the external thread 202 on the side away from the pin 1 to form a stable axial positioning. Then, the second limiting cap 203, which is fixedly connected by the end of the insert rod 201 through the bracket 3, fits against the outer wall of the bracket 3 to form an end anti-reverse structure. Meanwhile, the torsion ring 204 rotatably mounted on the outer side of the second limit cap 203 can drive the second limit cap 203 and the entire insertion rod 201 to rotate synchronously when rotating, so that the insertion rod 201 can accurately insert or withdraw from the insertion hole 103 of the pin 1 to achieve the limiting action. Thus, during the vibration of the fully mechanized mining face, the off-center load of the support 3 and the extension and retraction of the column, the insertion rod 201 forms a continuous lateral locking force on the pin 1, ensuring that the pin 1 will not be laterally displaced due to the loosening of the locking component or the impact of external force, thereby achieving reliable locking and anti-retraction protection for the pin 1.
[0014] In this embodiment, the pin 1 includes a pin 101 that is inserted and installed on the bracket 3. The pin 101 is used for the pin 1 hole. A notched retaining ring 5 is inserted and installed in the annular groove 104 opened outside the pin hole 6. The notched retaining ring 5 fits against the outer wall of the bracket 3 on the side away from the hydraulic column 4 to perform a limiting action. The pin 101 has an insertion hole 103. The pin 201 is inserted into the insertion hole 103 to perform a limiting action. The two ends of the pin 101 are screwed with first limiting caps 102 to prevent the pin 101 from slipping off.
[0015] The pin 1 is installed on the bracket 3 by the pin rod 101 and passes through the pin hole 6 of the hydraulic column 4 to achieve basic hinge positioning. The notched retaining ring 5 inserted in the annular groove 104 on the outside of the pin rod 101 fits against the outer wall of the bracket 3 on the side away from the column to form an outward anti-reverse limit, so that the pin rod 101 will not slip outward under vibration. The pin 101 has a hole 103 in the middle for the insertion of the rod 201, which locks the pin 101 laterally and further enhances the anti-vibration and anti-slip capability of the pin 1. At the same time, the first limit cap 102 screwed to both ends of the pin 101 forms a double-end seal, so that the pin 101 is stably constrained in both the axial and lateral directions. Thus, the pin 1 remains firmly in place and does not fall off under the conditions of hydraulic support 3 moving, bearing and impact, ensuring stable and reliable operation of the column connection.
[0016] Working principle: A pluggable pin 1 is set on the support 3, and the end of the pin 1 passes through the support 3 and reliably engages with the pin hole 6 on the hydraulic column 4 to form a load-bearing limit. Then, the limiting rod 2, which is plugged into the support 3, is inserted laterally into the pin 1 to achieve secondary locking. When the device is in working condition, the limiting rod 2 forms a rigid barrier to the lateral movement of the pin 1, so that the pin 1 remains stably positioned under extreme working conditions such as coal mining vibration, support 3 off-center load, and column extension and contraction impact, and will not slip off on its own due to traditional structural defects such as loosening of the locking clamp or fatigue falling off. The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A locking device for a column connecting pin (1) of a hydraulic support (3), comprising a support (3), characterized in that, Also includes: A pin (1) is inserted and installed on the bracket (3), and the end of the pin (1) passes through the bracket (3) and is used to insert into the pin hole (6) opened on the hydraulic column (4) to realize the limiting action; Limiting rod (2), which is installed on the bracket (3) and is connected to the pin (1), is used to limit the lateral movement of the pin (1).
2. The locking device for the column connection pin (1) of a hydraulic support (3) according to claim 1, characterized in that, The limiting rod (2) includes a plug (201) inserted into the bracket (3), and the plug (1) is inserted into one side of the plug (201).
3. The locking device for the column connecting pin (1) of a hydraulic support (3) according to claim 2, characterized in that, The insert (201) has a thread (202) on the side away from the pin (1) for screwing into the bracket (3).
4. The locking device for the column connection pin (1) of a hydraulic support (3) according to claim 3, characterized in that, The end of the insertion rod (201) away from the pin (1) passes through the bracket (3) and is fixedly connected to a second limiting cap (203). The second limiting cap (203) contacts the outer wall of the bracket (3). A torsion ring (204) is rotatably installed on the outside of the second limiting cap (203). The torsion ring (204) is used to rotate the second limiting cap (203) and even the insertion rod (201).
5. The locking device for the column connection pin (1) of a hydraulic support (3) according to claim 2, characterized in that, The pin (1) includes a pin (101) that is inserted and installed on the bracket (3). The pin (101) is used for the pin (1) hole. A notched retaining ring (5) is inserted and installed in the annular groove (104) outside the pin hole (6). The notched retaining ring (5) fits against the outer wall of the bracket (3) away from the hydraulic column (4) to perform a limiting action.
6. The locking device for the column connection pin (1) of a hydraulic support (3) according to claim 5, characterized in that, The pin (101) has a socket (103), the plug (201) is inserted into the socket (103) to perform a limiting action, and the two ends of the pin (101) are screwed with first limiting caps (102) to prevent the pin (101) from slipping.