A locking device for a hydraulic cylinder of a rolling line elevation adjustment

Abstract

The utility model provides a kind of easily mounted and disassembled rolling line elevation adjustment hydraulic cylinder locking device, belong to the technical field of auxiliary equipment on rolling line, solve the problem that existing locking device maintenance process needs to disassemble hydraulic cylinder parts, workload is big, affect assembly accuracy, easily damage seal part. Including locking cylinder body, the front and rear ends of locking cylinder body are respectively provided with cylinder body front end cover and cylinder body rear end cover, piston rod insertion hole is set in the middle part of locking cylinder body, the inside of locking cylinder body is provided with inner sleeve, the outside of inner sleeve movably covers and is provided with conical bushing, and conical bushing is inserted in the outer taper sleeve of middle part of locking cylinder body, disc spring is arranged between outer taper sleeve and cylinder body front end cover;Unlocking oil port and oil drain are provided on the outer wall of locking cylinder body. Its design is reasonable, compact structure, easy to disassemble, locking force is adjustable, reduce the workload of manufacture installation and maintenance disassembly, labor intensity is low, work efficiency is high, it is convenient to maintain.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary equipment on rolling lines, specifically relating to a hydraulic cylinder locking device for adjusting the elevation of rolling lines that is easy to install and disassemble. Background Technology

[0002] As a core piece of equipment ensuring rolling precision, stability, and production efficiency, the performance of the hydraulic cylinder for adjusting the rolling line elevation directly determines the quality of the final product, such as thickness accuracy and plate shape quality. It also relates to the continuity of the production process and is one of the indispensable key actuators in the automation and intelligent control system of modern rolling mills.

[0003] In practical applications, to prevent changes in the rolling line elevation caused by power outages or hydraulic system pressure loss, mechanical locking nuts or locking cylinders are typically used for locking. However, existing hydraulic cylinder piston rod locking devices require either hot or cold installation, or the locking device must be installed first, followed by the hydraulic cylinder components; furthermore, disassembly also requires cooling or heating, especially hot installation, which can adversely affect the seals. Additionally, maintenance of the locking device may require disassembling all or some components of the hydraulic cylinder individually, severely impacting the cylinder's assembly accuracy and sealing performance; simultaneously, the entire process is extremely cumbersome and complex, involving a large workload, and easily damaging the seals, resulting in long installation and maintenance times, high difficulty, and high costs. Therefore, it is necessary to improve the existing locking devices for rolling line elevation adjustment hydraulic cylinders. Utility Model Content

[0004] This utility model addresses the aforementioned problems by providing a hydraulic cylinder locking device for adjusting the elevation of a rolling line, which is easy to install and disassemble, has adjustable locking force, reduces the workload of manufacturing, installation, maintenance, and disassembly, has low labor intensity, high work efficiency, and is easy to maintain.

[0005] The technical solution adopted by this utility model is as follows: The hydraulic cylinder locking device for adjusting the elevation of a rolling line, which is easy to install and disassemble, includes a locking cylinder. The rear end of the locking cylinder is provided with a cylinder rear end cover, and the front end of the locking cylinder is provided with a cylinder front end cover. A piston rod insertion through hole is provided through the middle of the locking cylinder. An inner sleeve is provided inside the locking cylinder, near the end of the cylinder rear end cover. A conical bushing is movably fitted outside the inner sleeve. The conical bushing is inserted into an outer conical sleeve provided in the middle of the locking cylinder. A disc spring is provided between the outer conical sleeve and the cylinder front end cover. The locking cylinder is also provided with an unlocking oil port and an oil drain port. The unlocking oil port is connected to the rear cavity formed between the rear end of the outer conical sleeve and the cylinder rear end cover. The oil drain port is connected to the front cavity formed between the front end of the outer conical sleeve and the cylinder front end cover.

[0006] The inner sleeve includes a tapered locking sleeve body. An inner sleeve connecting flange is located at the rear end of the tapered locking sleeve body. The inner sleeve connecting flange has several circumferentially arranged rear end cap connecting holes. Furthermore, several inner sleeve locking slots extending axially and rearwardly are located on the side wall of the front end of the tapered locking sleeve body. The tapered locking sleeve body has a larger diameter at the end near the inner sleeve connecting flange and a smaller diameter at the end away from the inner sleeve connecting flange. The outer tapered sleeve drives the bushing body to move towards the inner sleeve connecting flange, causing the tapered locking sleeve body with the inner sleeve locking slots to retract inward, thereby achieving mechanical locking of the hydraulic cylinder piston rod of the elevation adjustment hydraulic cylinder.

[0007] The conical bushing includes a bushing body, the interior of which is provided with a conical inner wall, the shape of which corresponds to the shape of the conical locking sleeve of the inner sleeve. The operation of locking or releasing the conical locking sleeve as the outer conical bushing moves back and forth is achieved by using a conical bushing whose inner wall shape adapts to the shape of the inner sleeve.

[0008] The outer conical sleeve includes an outer sleeve body. One end of the outer sleeve body is provided with an inner sleeve pressing cavity for contacting the conical bushing outside the inner sleeve. An inner sleeve displacement groove is also provided at the through hole at the front end of the inner sleeve pressing cavity. The inner sleeve pressing cavity of the outer conical sleeve and the conical bushing outside the inner sleeve are used to compress and lock the conical locking sleeve body of the inner sleeve. Furthermore, during the movement and compression of the outer conical sleeve, the front end of the inner sleeve can temporarily extend into the inner sleeve displacement groove, thereby ensuring that the outer conical sleeve has sufficient effective movement distance.

[0009] An axially adjustable locking gap is provided between the front end cover of the cylinder and the front end face of the locking cylinder. The distance of the locking gap between the front end cover and the front end face of the locking cylinder is adjusted by adjusting the depth of the end cover connecting bolts screwed into the end cover connecting screw holes on the front end face of the locking cylinder. This adjusts the compression of the disc spring between the outer conical sleeve and the front end cover of the cylinder, thereby adjusting the thrust of the disc spring on the outer conical sleeve. This allows for adjustment of the tightness between the outer conical sleeve and the inner sleeve, while simultaneously adjusting the locking force of the inner sleeve on the piston rod.

[0010] A bushing retainer ring is provided between the end of the tapered bushing and the rear end face of the outer tapered bushing. The bushing retainer ring is connected to the retainer ring connecting screw hole provided on the rear end face of the outer tapered bushing via a retainer ring connecting bolt. The bushing retainer ring provided on the rear end face of the outer tapered bushing is used to fix the relative position of the tapered bushing in the inner sleeve pressing cavity of the outer tapered bushing, thereby facilitating the compression and locking of the tapered locking sleeve of the inner sleeve by the outer tapered bushing and the tapered bushing.

[0011] A sleeve is provided between the disc spring and the outer wall of the hydraulic cylinder piston rod, which is inserted into the piston rod insertion hole. This reduces wear on the disc spring and ensures the reliability of the device.

[0012] The beneficial effects of this utility model are as follows: Because this utility model employs a locking cylinder with a rear end cover and a front end cover, and a piston rod insertion hole penetrating the middle of the locking cylinder, an inner sleeve is provided inside the locking cylinder near the rear end cover, and a conical bushing is movably fitted outside the inner sleeve. The conical bushing is inserted into an outer conical sleeve located in the middle of the locking cylinder, and a disc spring is provided between the outer conical sleeve and the front end cover. The outer wall of the locking cylinder is provided with an unlocking port and a drain port. The unlocking port is connected to the rear cavity formed between the rear end of the outer conical sleeve and the rear end cover, and the drain port is connected to the front cavity formed between the front end of the outer conical sleeve and the front end cover. Therefore, its design is reasonable, its structure is compact, it is easy to assemble and disassemble, and the locking force is adjustable. Furthermore, since the hydraulic cylinder components do not need to be disassembled when installing and disassembling this hydraulic cylinder locking device, the workload during manufacturing, installation, and maintenance is greatly reduced, resulting in low labor intensity, reduced labor and economic costs, high work efficiency, and convenient maintenance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 yes Figure 1 A schematic diagram of an isometric assembly.

[0015] Figure 3 yes Figure 1 A cross-sectional view of the internal structure.

[0016] Figure 4 yes Figure 2 A schematic diagram of the inner sleeve in a machine.

[0017] Figure 5 yes Figure 3 A cross-sectional view of the internal structure of a tapered bushing.

[0018] Figure 6 yes Figure 3 A cross-sectional view of the internal structure of the outer conical sleeve.

[0019] Figure 7 This is a schematic diagram showing the hydraulic cylinder locking device of this utility model installed on the elevation adjustment hydraulic cylinder in one usage state.

[0020] The numbers in the diagram are as follows: 1. Locking cylinder body; 2. Rear end cap of cylinder body; 3. Hydraulic cylinder end cap connecting hole; 4. Front end cap of cylinder body; 5. End cap connecting bolt; 6. Piston rod insertion hole; 7. Unlocking oil port; 8. Drain port; 9. Inner sleeve; 10. Conical sleeve connecting bolt; 11. Conical bushing; 12. Outer conical sleeve; 13. Bushing retaining ring; 14. Retaining ring connecting bolt; 15. Disc spring; 16. Sleeve; 17. Locking adjustment clearance; 18. Hydraulic cylinder piston rod; 19. Inner sleeve connecting flange; 20. Rear end cap connecting hole; 21. Conical locking sleeve body; 22. Inner sleeve locking seam; 23. Bushing body; 24. Bushing conical inner wall; 25. Outer sleeve body; 26. Inner sleeve pressing cavity; 27. Inner sleeve displacement groove; 28. Retaining ring connecting screw hole; 29. ​​Hydraulic cylinder locking device; 30. Elevation adjustment hydraulic cylinder; 31. Hydraulic cylinder front end cap; 32. Locking device connecting bolt. Detailed Implementation

[0021] according to Figures 1-7 The specific structure of this utility model is described in detail. This easy-to-install and disassemble hydraulic cylinder locking device for adjusting the height of a rolling line includes a locking cylinder 1 sleeved on the piston rod 18 of the hydraulic cylinder. A rear end cover 2 is provided at the rear end of the locking cylinder 1, and a front end cover 4 is provided at the front end. A piston rod insertion through hole 6 is provided through the middle of the locking cylinder 1. The front end cover 4 and the rear end cover 2 are respectively connected to the locking cylinder 1 by end cover connecting bolts 5. An unlocking oil port 7 and a drain port 8 are also provided on the outer wall of the locking cylinder 1. The unlocking oil port 7 communicates with the rear cavity formed between the rear end of the outer conical sleeve 12 and the rear end cover 2 of the cylinder, while the drain port 8 communicates with the front cavity formed between the front end of the outer conical sleeve 12 and the front end cover 4 of the cylinder, used to discharge hydraulic oil leaking into the front cavity formed between the front end of the outer conical sleeve 12 and the front end cover 4 of the cylinder. Furthermore, the rear end cover 2 of the cylinder of the hydraulic cylinder locking device 29 is also fixedly connected to the front end cover 31 of the hydraulic cylinder of the elevation adjustment hydraulic cylinder 30 through the locking device connecting bolt 32 provided in the hydraulic cylinder end cover connecting hole 3.

[0022] An inner sleeve 9 is provided inside the locking cylinder 1, near the rear end cover 2. The inner sleeve 9 consists of a tapered locking sleeve body 21, an inner sleeve connecting flange 19, a rear end cover connecting hole 20, and an inner sleeve locking slot 22. The rear end of the tapered locking sleeve body 21 is provided with the inner sleeve connecting flange 19, which has several rear end cover connecting holes 20 arranged circumferentially. The inner sleeve 9 is fixedly connected to the rear end cover 2 of the cylinder by tapered sleeve connecting bolts 10 provided in the rear end cover connecting holes 20. At the same time, several inner sleeve locking slots 22 extending axially and rearward are provided on the side wall of the front end of the tapered locking sleeve body 21. Each inner sleeve locking slot 22 is arranged at equal intervals along the circumference. That is, the outer surface of the inner sleeve 9 has a certain taper and an open-loop structure, which makes it easy to deform radially. Moreover, the diameter of the tapered locking sleeve body 21 near the inner sleeve connecting flange 19 is large, and the diameter of the end away from the inner sleeve connecting flange 19 is small. Furthermore, the outer conical sleeve 12 drives the bushing body 23 to move towards the inner sleeve connecting flange 19, so that the conical locking sleeve 21 with the inner sleeve locking slot 22 is provided on it retracts inward, thereby achieving mechanical locking of the hydraulic cylinder piston rod 18 of the elevation adjustment hydraulic cylinder 30.

[0023] The inner sleeve 9 is externally fitted with a conical bushing 11, which is inserted into the outer conical sleeve 12 located in the middle of the locking cylinder 1. The conical bushing 11 is composed of a bushing body 23, and the bushing body 23 has an inner conical wall 24. The shape of the inner conical wall 24 corresponds to the shape (taper and inclination direction) of the conical locking sleeve 21 of the inner sleeve 9. Thus, by using the conical bushing 11, whose inner wall shape is adapted to the shape of the inner sleeve 9, the operation of locking or releasing the conical locking sleeve 21 as the outer conical sleeve 12 moves back and forth is realized. It is understood that, depending on the specific application requirements, the coefficient of friction between the inner sleeve 9 and the conical bushing 11 should be small, and the coefficient of friction between the inner sleeve 9 and the hydraulic cylinder piston rod 18 should be large. For example, the inner sleeve 9 can be made of brass, and the conical bushing 11 can be made of tin bronze.

[0024] Furthermore, the outer conical sleeve 12 is composed of an outer sleeve body 25. One end of the outer sleeve body 25 is provided with an inner sleeve pressing cavity 26 for contacting the conical bushing 11 outside the inner sleeve 9. An inner sleeve displacement groove 27 is also provided at the through hole at the front end of the inner sleeve pressing cavity 26. The conical bushing 11 is inserted into the inner sleeve pressing cavity 26 of the outer conical sleeve 12. The inner sleeve pressing cavity 26 of the outer conical sleeve 12 and the conical bushing 11 outside the inner sleeve 9 are used to press and lock the conical locking sleeve 21 of the inner sleeve 9. Moreover, during the movement and pressing of the outer conical sleeve 12, the front end of the inner sleeve 9 can temporarily extend into the inner sleeve displacement groove 27, thereby ensuring that the outer conical sleeve 12 has a sufficient effective movement distance.

[0025] Meanwhile, a bushing retainer 13 is provided between the end of the conical bushing 11 and the rear end face of the outer conical sleeve 12. The bushing retainer 13 is connected to the retainer connecting screw hole 28 on the rear end face of the outer conical sleeve 12 via a retainer connecting bolt 14. The bushing retainer 13 on the rear end face of the outer conical sleeve 12 then fixes the relative position of the conical bushing 11 within the inner sleeve pressing cavity 26 of the outer conical sleeve 12, facilitating the compression and locking of the conical locking sleeve 21 of the inner sleeve 9 by the outer conical sleeve 12 and the conical bushing 11. Additionally, a disc spring 15 is provided between the front end of the outer conical sleeve 12 and the rear side of the front end cover 4 of the cylinder. A sleeve 16 is provided between the disc spring 15 and the outer wall of the hydraulic cylinder piston rod 18, which is inserted into the piston rod insertion through hole 6, to reduce wear on the disc spring 15 and ensure the reliability of the device.

[0026] An axially adjustable locking adjustment gap 17 is provided between the front end cover 4 of the cylinder and the front end face of the locking cylinder 1. By adjusting the depth of the end cover connecting bolt 5 screwed into the end cover connecting screw hole on the front end face of the locking cylinder 1, the distance of the locking adjustment gap 17 between the front end cover 4 of the cylinder and the front end face of the locking cylinder 1 is adjusted, thereby adjusting the compression of the disc spring 15 provided between the outer conical sleeve 12 and the front end cover 4 of the cylinder, thereby adjusting the thrust of the disc spring 15 on the outer conical sleeve 12, realizing the adjustment of the clamping degree (locking force) between the outer conical sleeve 12 and the inner sleeve 9, that is, realizing the adjustment of the mechanical locking force.

[0027] When installing this easy-to-install and disassemble hydraulic cylinder locking device for adjusting the rolling line elevation, first, loosen the end cap connecting bolt 5 between the front end cover 4 of the cylinder and the front end face of the locking cylinder 1, so that the internal disc spring 15 is in an uncompressed state. Then, insert the entire hydraulic cylinder locking device 29 into the front end of the hydraulic cylinder piston rod 18 of the elevation adjusting hydraulic cylinder 30; then, use the locking device connecting bolt 32 to fix the rear end cover 2 of the cylinder of the hydraulic cylinder locking device 29 to the front end cover 31 of the hydraulic cylinder of the elevation adjusting hydraulic cylinder 30. Subsequently, tighten the end cap connecting bolt 5 on the front end cover 4 of the cylinder one by one in a diagonal and multi-step manner. When disassembling the locking device, first loosen the end cap connecting bolt 5 between the front end cover 4 of the cylinder and the front end face of the locking cylinder 1, so that the inner sleeve 9 is disengaged from the hydraulic cylinder piston rod 18, and then remove the locking device connecting bolt 32 to remove the locking device from the piston rod.

[0028] When it is necessary to lock the hydraulic cylinder piston rod 18, the hydraulic oil in the rear cavity between the rear end cover 2 of the cylinder and the rear end of the outer cone sleeve 12 is discharged through the unlocking oil port 7. Then, with the help of the reset spring force of the disc spring 15, the outer cone sleeve 12 and the cone bushing 11 inside it are pushed to the left (the tail of the hydraulic cylinder piston rod 18), thereby pressing the inner sleeve 9, so that the cone locking sleeve 21 of the inner sleeve 9 and the hydraulic cylinder piston rod 18 generate a locking force, thus achieving a mechanical locking effect.

[0029] When unlocking is required, hydraulic oil is injected through the unlocking port 7 into the rear cavity between the rear end cover 2 of the cylinder and the rear end of the outer cone sleeve 12. As the oil pressure in the rear cavity increases, the outer cone sleeve 12 is gradually pushed to the right (towards the head of the hydraulic cylinder piston rod 18), thereby compressing the disc spring 15. When the outer cone sleeve 12 disengages from the inner sleeve 9, the locking force exerted by the inner sleeve 9 on the hydraulic cylinder piston rod 18 disappears, thus releasing the mechanical locking of the piston rod. At this point, the hydraulic cylinder piston rod 18 can freely extend and retract to adjust its position. It is understood that this hydraulic cylinder locking device is not only suitable for locking the hydraulic cylinder for adjusting the rolling line elevation, but also for locking other hydraulic cylinders.

Claims

1. A hydraulic cylinder locking device for adjusting the elevation of a rolling line, which is easy to install and disassemble, comprising a locking cylinder (1), characterized in that: The locking cylinder (1) has a rear end cap (2) at its rear end and a front end cap (4) at its front end. A piston rod insertion hole (6) is provided through the middle of the locking cylinder (1). An inner sleeve (9) is provided inside the locking cylinder (1) at one end near the rear end cap (2). A conical bushing (11) is movably fitted on the outside of the inner sleeve (9). The conical bushing (11) is inserted into the locking cylinder (1). Inside the outer conical sleeve (12) of the part, a disc spring (15) is provided between the outer conical sleeve (12) and the front end cover (4) of the cylinder; the locking cylinder (1) is also provided with an unlocking oil port (7) and an oil drain port (8), the unlocking oil port (7) is connected to the rear cavity formed between the rear end of the outer conical sleeve (12) and the rear end cover (2) of the cylinder, and the oil drain port (8) is connected to the front cavity formed between the front end of the outer conical sleeve (12) and the front end cover (4) of the cylinder.

2. The hydraulic cylinder locking device for adjusting the elevation of a rolling line, which is easy to install and disassemble, as described in claim 1, is characterized in that: The inner sleeve (9) includes a tapered locking sleeve body (21), and an inner sleeve connecting flange (19) is provided at the rear end of the tapered locking sleeve body (21). The inner sleeve connecting flange (19) is provided with a plurality of rear end cover connecting holes (20) arranged along the circumference. Furthermore, a plurality of inner sleeve locking slots (22) are provided on the side wall of the front end of the tapered locking sleeve body (21) and extend axially and rearward. The tapered locking sleeve body (21) has a larger diameter at the end near the inner sleeve connecting flange (19) and a smaller diameter at the end away from the inner sleeve connecting flange (19).

3. The hydraulic cylinder locking device for adjusting the elevation of a rolling line, which is easy to install and disassemble, as described in claim 2, is characterized in that: The conical bushing (11) includes a bushing body (23), and the bushing body (23) has a bushing conical inner wall (24) inside, and the shape of the bushing conical inner wall (24) corresponds to the shape of the conical locking body (21) of the inner sleeve (9).

4. The hydraulic cylinder locking device for adjusting the elevation of a rolling line, which is easy to install and disassemble, as described in claim 1, is characterized in that: The outer conical sleeve (12) includes an outer sleeve body (25), one end of which is provided with an inner sleeve pressing cavity (26) for contacting the conical bushing (11) outside the inner sleeve (9), and an inner sleeve displacement groove (27) is also provided at the through hole at the front end of the inner sleeve pressing cavity (26).

5. The hydraulic cylinder locking device for adjusting the elevation of a rolling line, which is easy to install and disassemble, as described in claim 1, is characterized in that: An axially adjustable locking gap (17) is provided between the front end cover (4) of the cylinder and the front end face of the locking cylinder (1).

6. The hydraulic cylinder locking device for adjusting the elevation of a rolling line, which is easy to install and disassemble, as described in claim 1, is characterized in that: A bushing retainer ring (13) is provided between the end of the tapered bushing (11) and the rear end face of the outer tapered bushing (12). The bushing retainer ring (13) is connected to the retainer ring connecting screw hole (28) provided on the rear end face of the outer tapered bushing (12) by a retainer ring connecting bolt (14).

7. The hydraulic cylinder locking device for adjusting the elevation of a rolling line, which is easy to install and disassemble, as described in claim 1, is characterized in that: A sleeve (16) is provided between the disc spring (15) and the outer wall of the hydraulic cylinder piston rod (18) inserted into the piston rod insertion through hole (6).

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