Hydraulic locking oil cylinder assembly

Abstract

The invention relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic locking oil cylinder assembly which comprises a cylinder body, a small cylinder barrel is arranged at the upper end of the cylinder body, an oil inlet pipe is arranged on the left side of the rear end of the cylinder body, a piston rod is arranged at the right end of the cylinder body, a locking oil pipe is arranged on the right side of the front end of the cylinder body, and an external oil pipe is correspondingly arranged on the front side of the locking oil pipe. When the fixing plate slides leftwards, a stabilizing inclined block is also extruded, the stabilizing inclined block drives a connecting rod to slide downwards on a supporting plate and compress a second spring until the fixing plate crosses the upper end of the stabilizing inclined block, the stabilizing inclined block is reset upwards under the action of the second spring, and at the moment, the left end of the fixing plate is just attached to the right end of the locking oil pipe and stops moving; the stable inclined block is beneficial to supporting the lower side of the fixing plate, the stability of the fixing plate and the blocking plate inserted into the locking oil pipe is ensured, the situation that the blocking plate automatically moves rightwards when bearing large oil pressure is avoided, and the stable locking and supporting effect in the cylinder body is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic cylinders, and in particular to a hydraulic locking cylinder assembly. Background Art

[0002] The hydraulic cylinder is an actuator in the hydraulic transmission system. It is an energy conversion device that converts hydraulic energy into mechanical energy. The hydraulic motor realizes continuous rotary motion, while the hydraulic cylinder realizes reciprocating motion. The structural types of hydraulic cylinders are piston cylinders, plunger cylinders, and swing cylinders. The piston cylinder and plunger cylinder realize reciprocating linear motion, output speed and thrust, and the swing cylinder realizes reciprocating swing, output angular velocity (speed) and torque. In addition to being used individually, hydraulic cylinders can also be combined in two or more or in combination with other mechanisms to complete special functions. Hydraulic cylinders have a simple structure and reliable operation, and have been widely used in the hydraulic system of machine tools.

[0003] After searching, the patent with application number CN202223168068.X discloses "a locking cylinder assembly", including a cylinder body, the side wall of which is fixedly connected to two symmetrically arranged additional pipes, the additional pipes are connected to the cylinder body, the side wall of the cylinder body is fixedly connected to an oil inlet pipe, the side wall of the additional pipe is fixedly connected to a locking oil pipe, and an end cover is provided at one end of the cylinder body.

[0004] However, in use, the above patent realizes the locking of the piston rod at the telescopic end by injecting locking oil into the cylinder body through a locking oil pipe. When the piston rod at the telescopic end is subjected to a large pressure, it is easy to cause the oil pressure in the cylinder to increase, and the excessive oil pressure will flow back into the locking oil pipe, which will not only easily cause instability or looseness and leakage at the connection between the locking oil pipe and the connecting pipe on the cylinder body, but also easily cause the oil pressure returning in the locking oil pipe to be too high, resulting in the locking oil pipe bursting and damage. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that in the prior art, locking of the piston rod at the telescopic end is achieved by injecting locking oil into the cylinder body through a locking oil pipe. When the piston rod at the telescopic end is subjected to a large pressure, the oil pressure in the cylinder is easily increased, and the excessive oil pressure will flow back into the locking oil pipe, which not only easily causes instability or looseness and leakage at the connection between the locking oil pipe and the connecting pipe on the cylinder body, but also easily causes the oil pressure returning in the locking oil pipe to be too high, resulting in the locking oil pipe bursting and damage. A hydraulic locking cylinder assembly is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A hydraulic locking oil cylinder assembly comprises a cylinder body, a small cylinder barrel is arranged at the upper end of the cylinder body, an oil inlet pipe is arranged at the left side of the rear end of the cylinder body, a piston rod is arranged at the right end of the cylinder body, a locking oil pipe is arranged at the right side of the front end of the cylinder body, and an external oil pipe is arranged at the front side of the locking oil pipe;

[0008] A stable connection mechanism is also provided for stably connecting the locking oil pipe and the external oil pipe, the stable connection mechanism comprising plug blocks fixedly mounted on the left and right ends of the locking oil pipe, and corresponding plug blocks on the left and right sides of the rear end of the external oil pipe are provided with mutually matching card slots;

[0009] An explosion-proof mechanism for preventing the external oil pipe from bursting is also provided. The explosion-proof mechanism comprises a blocking plate slidably inserted on the right end of the locking oil pipe, and a fixing plate is fixedly installed on the right end of the blocking plate.

[0010] Preferably, upper and lower clamping blocks are provided on the upper and lower sides of the front portion of the locking oil pipe corresponding to the external oil pipe, the rear ends of the upper and lower clamping blocks are slidably mounted on the cylinder body, and elastic sheets are fixedly mounted on the rear ends of the upper and lower clamping blocks.

[0011] Preferably, racks are fixedly mounted on the left ends of the upper and lower clamping blocks, gear shafts are meshed between the racks, the rear end of the gear shafts is rotatably mounted on the cylinder body, and a torsion spring is sleeved on the outer side of the gear shafts.

[0012] Preferably, a driving inclined block is fixedly mounted on the rear side of the upper and lower clamping blocks, a push rod is provided on the right side of the driving inclined block, and a movable plate is fixedly mounted on the right end of the push rod.

[0013] Preferably, a screw rod is threadedly installed on the middle part of the movable plate, the rear end of the movable plate is slidably installed on the cylinder body, and the screw rod is rotatably installed on the cylinder body.

[0014] Preferably, a connecting plate is fixedly installed at the lower end of the driving bevel block, and the rear end of the connecting plate is slidably installed on the locking oil pipe. Left and right clamping blocks are fixedly installed on the left and right sides of the lower end of the connecting plate, and two clamping grooves are opened on the left and right sides of the upper end of the external oil pipe corresponding to the left and right clamping blocks.

[0015] Preferably, a spring 1 is fixedly mounted on the upper left end of the fixed plate, and the left end of the spring 1 is fixedly mounted on the locking oil pipe.

[0016] Preferably, a sealing strip is provided on the left end of the fixing plate, and a sealing groove is provided on the right end of the locking oil pipe corresponding to the sealing strip.

[0017] Preferably, a stabilizing inclined block is slidably mounted on the front end of the cylinder body at the lower side of the blocking plate corresponding to the fixed plate, and a connecting rod is fixedly mounted on the lower end of the stabilizing inclined block.

[0018] Preferably, a support plate is slidably installed through the lower end of the connecting rod, the rear end of the support plate is fixedly installed on the cylinder body, and a second spring is sleeved on the outer side of the connecting rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, align the card slot on the external oil pipe with the plug block, manually push the external oil pipe to make it plugged into the locking oil pipe, rotate the screw rod to drive the movable plate to slide to the left, the movable plate drives the push rod to slide to the left synchronously, the push rod squeezes the driving inclined block, the driving inclined block drives the upper and lower card blocks on the upper side to slide downward, the upper and lower card blocks on the upper side drive the rack fixed thereto to move downward synchronously, drive the gear shaft to rotate, compress the torsion spring, the gear shaft drives the rack on the other side and the lower upper and lower card blocks to move upward, at this time, the upper and lower card blocks and the elastic sheets on both sides move relative to each other, until the elastic sheets on the upper and lower card blocks on both sides are tightly pressed against the protrusions of the external oil pipe, the elastic sheets will be blocked by the external oil pipe and deformed at this time, Then the upper and lower clamping blocks on both sides will tightly squeeze and fix the external oil pipe on the locking oil pipe. At the same time, the driving bevel block will also drive the connecting plate and the left and right clamping blocks on both sides to descend synchronously, so that the left and right clamping blocks on both sides descend and are connected to the second clamping slot. The upper and lower clamping blocks on both sides are fixed from the upper and lower sides, and the left and right clamping blocks on both sides are fixed from the left and right sides, which is convenient for the fixed installation and disassembly of the external oil pipe and the locking oil pipe. The fixing effect is good, which improves the stability of the connection between the external oil pipe and the locking oil pipe, reduces the situation of bursting and leakage at the connection between the external oil pipe and the locking oil pipe due to excessive oil pressure, and also can quickly disassemble and replace the external oil pipe in case of burst damage, thereby improving work efficiency.

[0021] 2. In the present invention, when the locking support oil pressure in the cylinder body is too high, the screw rod can continue to be rotated to drive the movable plate to continue to move to the left, and the movable plate will push the fixed plate and the blocking plate to slide into the locking oil pipe, compressing the spring until the blocking plate completely blocks the locking oil pipe, and the screw rod stops rotating. The provided blocking plate is convenient for blocking the locking oil pipe, which effectively prevents the oil pressure in the cylinder body from being too high, causing pressure leakage and affecting the stability of the connection between the locking oil pipe and the external oil pipe, and also avoids the leakage of locking oil causing excessive oil pressure inside the external oil pipe, causing burst damage to the external oil pipe, thereby ensuring the normal operation of the external oil pipe.

[0022] 3. In the present invention, the sealing strip on the fixed plate is also inserted into the sealing groove to prevent excessive oil pressure in the cylinder body, which causes the locking oil to penetrate from the connection between the blocking plate and the locking oil pipe, thereby ensuring a stable locking support force in the cylinder body.

[0023] 4. In the present invention, when the fixed plate slides to the left, the stabilizing bevel block is also squeezed, and the stabilizing bevel block drives the connecting rod to slide downward on the supporting plate, compressing the second spring, until the fixed plate passes over the upper end of the stabilizing bevel block, and the stabilizing bevel block is reset upward under the action of the second spring. At this time, the left end of the fixed plate is just in contact with the right end of the locking oil pipe and stops moving. The stabilizing bevel block is beneficial for supporting the lower side of the fixed plate, ensuring the stability of the fixed plate and the blocking plate inserted in the locking oil pipe, avoiding the blocking plate from automatically moving to the right when subjected to a large oil pressure, and ensuring the stable locking support effect inside the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the left three-dimensional structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the right three-dimensional structure of the present invention;

[0027] Figure 4 For the present invention Figure 1 A partially enlarged structural diagram of the connection between the middle cylinder body, the locking oil pipe and the external oil pipe;

[0028] Figure 5 For the present invention Figure 2 A partially enlarged structural diagram of the connection between the middle cylinder body, the locking oil pipe and the external oil pipe;

[0029] Figure 6 For the present invention Figure 3 A partially enlarged structural diagram of the connection between the middle cylinder body, the locking oil pipe and the external oil pipe;

[0030] Figure 7 For the present invention Figure 4 The structural diagram at A in the middle;

[0031] Figure 8 For the present invention Figure 4 Schematic diagram of the structure at B in the middle;

[0032] Fig. 9 For the present invention Figure 4 Schematic diagram of the structure at C in the middle;

[0033] Fig.10 For the present invention Figure 4 Schematic diagram of the structure at D in the middle;

[0034] Fig.11 For the present invention Figure 5 Schematic diagram of the structure at E in the middle;

[0035] Fig.12 For the present invention Figure 6 The structural diagram of the F position in the middle;

[0036] In the figure: 1, cylinder body; 101, small cylinder barrel; 102, oil inlet pipe; 103, piston rod; 2, locking oil pipe; 3, external oil pipe;

[0037] Stable connection mechanism: 4, plug-in block; 5, card slot 1; 6, upper and lower card blocks; 61, elastic sheet; 7, rack; 8, gear shaft; 9, torsion spring; 10, driving inclined block; 11, push rod; 12, movable plate; 13, screw; 14, connecting plate; 15, left and right card blocks; 16, card slot 2;

[0038] Explosion-proof mechanism: 17. blocking plate; 18. fixing plate; 19. spring one; 20. sealing groove; 21. sealing strip; 22. stabilizing inclined block; 23. connecting rod; 24. supporting plate; 25. spring two. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] Reference Figure 1-Figure 12A hydraulic locking cylinder assembly comprises a cylinder body 1, a small cylinder barrel 101 is provided at the upper end of the cylinder body 1, an oil inlet pipe 102 is provided on the left side of the rear end of the cylinder body 1, a piston rod 103 is provided on the right end of the cylinder body 1, a locking oil pipe 2 is provided on the right side of the front end of the cylinder body 1, an external oil pipe 3 is provided on the front side of the locking oil pipe 2, and a stable connection mechanism for stably connecting the locking oil pipe 2 and the external oil pipe 3 is also provided, the stable connection mechanism comprises plug blocks 4 fixedly mounted on the left and right ends of the locking oil pipe 2, and the plug blocks 4 on the left and right sides of the rear end of the external oil pipe 3 are provided with mutually matching card grooves 5, upper and lower clamping blocks 6 are provided on the upper and lower sides of the front part of the locking oil pipe 2 corresponding to the external oil pipe 3, the rear ends of the upper and lower clamping blocks 6 are slidably mounted on the cylinder body 1, and elastic sheets 61 are fixedly mounted on the rear ends of the upper and lower clamping blocks 6. A rack 7 is fixedly installed on the left end of the block 6, and a gear shaft 8 is meshed between the racks 7. The rear end of the gear shaft 8 is rotatably installed on the cylinder body 1. A torsion spring 9 is sleeved on the outer side of the gear shaft 8. A driving inclined block 10 is fixedly installed on the rear side of the upper and lower blocks 6. A push rod 11 is provided on the right side of the driving inclined block 10. A movable plate 12 is fixedly installed on the right end of the push rod 11. A screw 13 is threadedly installed on the middle part of the movable plate 12. The rear end of the movable plate 12 is slidably installed on the cylinder body 1, and the screw 13 is rotatably installed on the cylinder body 1. A connecting plate 14 is fixedly installed on the lower end of the driving inclined block 10. The rear end of the connecting plate 14 is slidably installed on the locking oil pipe 2. Left and right blocks 15 are fixedly installed on the left and right sides of the lower end of the connecting plate 14, and a second card groove 16 is provided on the left and right sides of the upper end of the external oil pipe 3 corresponding to the left and right blocks 15;

[0042] During operation, align the card slot 15 on the external oil pipe 3 with the plug block 4, manually push the external oil pipe 3 to make it plugged into the locking oil pipe 2, rotate the screw 13 to drive the movable plate 12 to slide to the left, and the movable plate 12 drives the push rod 11 to slide to the left synchronously, and the push rod 11 squeezes the driving inclined block 10, and the driving inclined block 10 drives the upper and lower card blocks 6 on the upper side to slide downward, and the upper and lower card blocks 6 on the upper side drive the rack 7 fixed thereto to move downward synchronously, driving the gear shaft 8 to rotate and compress the torsion spring 9. The gear shaft 8 drives the rack 7 on the other side and the upper and lower card blocks 6 on the lower side to move upward. At this time, the upper and lower card blocks 6 and the elastic sheets 61 on both sides move relative to each other until the elastic sheets 61 on the upper and lower card blocks 6 on both sides are tightly pressed against the protrusions of the external oil pipe 3. At this time, the elastic sheets 61 will be blocked by the external oil pipe 3 The block is deformed, and then the upper and lower clamping blocks 6 on both sides will tightly squeeze and fix the external oil pipe 3 on the locking oil pipe 2. At the same time, the driving inclined block 10 will also drive the connecting plate 14 and the left and right clamping blocks 15 on both sides to descend synchronously, so that the left and right clamping blocks 15 on both sides descend and are connected to the second clamping groove 16. The upper and lower clamping blocks 6 on both sides are fixed from the upper and lower sides, and the left and right clamping blocks 15 on both sides are fixed from the left and right sides, which is convenient for the fixed installation and disassembly of the external oil pipe 3 and the locking oil pipe 2. The fixing effect is good, which improves the stability of the connection between the external oil pipe 3 and the locking oil pipe 2, reduces the situation of bursting and leakage at the connection between the external oil pipe 3 and the locking oil pipe 2 due to excessive oil pressure, and also can quickly disassemble and replace the external oil pipe 3 in case of burst damage, thereby improving work efficiency.

[0043] As an embodiment of the present invention, an explosion-proof mechanism for preventing the external oil pipe 3 from bursting is also provided, the explosion-proof mechanism includes a blocking plate 17 slidably inserted on the right end of the locking oil pipe 2, a fixing plate 18 is fixedly installed on the right end of the blocking plate 17, a spring 19 is fixedly installed on the upper side of the left end of the fixing plate 18, the left end of the spring 19 is fixedly installed on the locking oil pipe 2, a sealing strip 21 is provided on the left end of the fixing plate 18, and a sealing groove 20 is provided on the right end of the locking oil pipe 2 corresponding to the sealing strip 21, a stabilizing inclined block 22 is slidably installed corresponding to the fixing plate 18 on the front end of the cylinder body 1 at the lower side of the blocking plate 17, a connecting rod 23 is fixedly installed at the lower end of the stabilizing inclined block 22, a supporting plate 24 is slidably installed through the lower end of the connecting rod 23, a rear end of the supporting plate 24 is fixedly installed on the cylinder body 1, and a spring 25 is sleeved on the outer side of the connecting rod 23;

[0044] During operation, when the locking support oil pressure in the cylinder body 1 is too high, the screw 13 can continue to be rotated to drive the movable plate 12 to continue to move to the left, and the movable plate 12 will push the fixed plate 18 and the blocking plate 17 to slide into the locking oil pipe 2, compressing the spring 19, until the blocking plate 17 completely blocks the locking oil pipe 2, and the screw 13 stops rotating. The set blocking plate 17 is convenient for blocking the locking oil pipe 2, effectively preventing the oil pressure in the cylinder body 1 from being too high, resulting in pressure leakage, affecting the stability of the connection between the locking oil pipe 2 and the external oil pipe 3, and also avoiding the leakage of locking oil causing the internal oil pressure of the external oil pipe 3 to be too high, resulting in the bursting and damage of the external oil pipe 3, ensuring the normal operation of the external oil pipe 3. At the same time, the sealing strip 21 on the fixed plate 18 will also be inserted into the sealing groove 20 to avoid excessive oil pressure in the cylinder body 1. This causes the locking oil to seep out from the connection between the blocking plate 17 and the locking oil pipe 2, thereby ensuring a stable locking support force in the cylinder body 1. When the fixed plate 18 slides to the left, it will also squeeze the stabilizing bevel 22. The stabilizing bevel 22 drives the connecting rod 23 to slide downward on the supporting plate 24, compressing the spring 25, until the fixed plate 18 passes over the upper end of the stabilizing bevel 22. The stabilizing bevel 22 is reset upward under the action of the spring 25. At this time, the left end of the fixed plate 18 also fits with the right end of the locking oil pipe 2 to stop moving. The stabilizing bevel 22 is beneficial to supporting the lower side of the fixed plate 18, ensuring the stability of the fixed plate 18 and the blocking plate 17 inserted in the locking oil pipe 2, avoiding the blocking plate 17 from automatically moving to the right when subjected to a large oil pressure, and ensuring a stable locking support effect inside the cylinder body 1.

[0045] Working principle:

[0046] When the present invention is in use, align the card slot 15 on the external oil pipe 3 with the plug block 4, manually push the external oil pipe 3 to make it plugged into the locking oil pipe 2, rotate the screw rod 13 to drive the movable plate 12 to slide to the left, and the movable plate 12 drives the push rod 11 to slide to the left synchronously, and the push rod 11 squeezes the driving inclined block 10, and the driving inclined block 10 drives the upper and lower card blocks 6 on the upper side to slide downward, and the upper and lower card blocks 6 on the upper side drive the rack 7 fixed thereto to move downward synchronously, driving the gear shaft 8 to rotate, compressing the torsion spring 9, and the gear shaft 8 drives the rack 7 on the other side and the upper and lower card blocks 6 on the lower side to move upward, at this time, the upper and lower card blocks 6 and the elastic sheets 61 on both sides move relative to each other, until the elastic sheets 61 on the upper and lower card blocks 6 on both sides are tightly pressed against the protrusions of the external oil pipe 3, and the elastic sheets 61 are now stressed. The upper and lower clamping blocks 6 on both sides are deformed to prevent the external oil pipe 3 from being blocked, and then the upper and lower clamping blocks 6 on both sides will squeeze the external oil pipe 3 tightly and fix it on the locking oil pipe 2. At the same time, the driving inclined block 10 will also drive the connecting plate 14 and the left and right clamping blocks 15 on both sides to descend synchronously, so that the left and right clamping blocks 15 on both sides descend and are connected to the clamping groove 16. The upper and lower clamping blocks 6 on both sides are fixed from the upper and lower sides, and the left and right clamping blocks 15 on both sides are fixed from the left and right sides, which is convenient for the fixed installation and disassembly of the external oil pipe 3 and the locking oil pipe 2. The fixing effect is good, which improves the stability of the connection between the external oil pipe 3 and the locking oil pipe 2, reduces the situation of bursting and leakage at the connection between the external oil pipe 3 and the locking oil pipe 2 caused by excessive oil pressure, and can also quickly repair the external oil pipe 3 in case of burst damage. The invention can be quickly disassembled and replaced, and the working efficiency is improved. When the locking support oil pressure in the cylinder body 1 is too large, the screw rod 13 can be continuously rotated to drive the movable plate 12 to continue to move to the left. The movable plate 12 will push the fixed plate 18 and the blocking plate 17 to slide into the locking oil pipe 2 and compress the spring 19. Until the blocking plate 17 completely blocks the locking oil pipe 2, the screw rod 13 stops rotating. The provided blocking plate 17 is convenient for blocking the locking oil pipe 2, and effectively prevents the oil pressure in the cylinder body 1 from being too large, resulting in pressure leakage, affecting the stability of the connection between the locking oil pipe 2 and the external oil pipe 3, and also avoiding the leakage of locking oil causing the internal oil pressure of the external oil pipe 3 to be too large, resulting in the bursting and damage of the external oil pipe 3, thereby ensuring the normal operation of the external oil pipe 3. At the same time, the seal on the fixed plate 18 The strip 21 will also be inserted into the sealing groove 20 to prevent the oil pressure in the cylinder body 1 from being too high, causing the locking oil to penetrate from the connection between the blocking plate 17 and the locking oil pipe 2, thereby ensuring the stable locking support force in the cylinder body 1. When the fixed plate 18 slides to the left, it will also squeeze the stabilizing bevel 22. The stabilizing bevel 22 drives the connecting rod 23 to slide downward on the supporting plate 24, compressing the spring 25, until the fixed plate 18 passes over the upper end of the stabilizing bevel 22. The stabilizing bevel 22 is reset upward under the action of the spring 25. At this time, the left end of the fixed plate 18 also fits with the right end of the locking oil pipe 2 to stop moving. The stabilizing bevel 22 is beneficial to supporting the lower side of the fixed plate 18, ensuring the stability of the fixed plate 18 and the blocking plate 17 inserted in the locking oil pipe 2.This prevents the blocking plate 17 from automatically moving to the right when subjected to a large oil pressure, thereby ensuring a stable locking support effect inside the cylinder body 1.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic locking cylinder assembly, comprising a cylinder body (1), characterized in that: The cylinder body (1) has a small cylinder barrel (101) at the upper end, an oil inlet pipe (102) at the left side of the rear end of the cylinder body (1), a piston rod (103) at the right end of the cylinder body (1), a locking oil pipe (2) at the right side of the front end of the cylinder body (1), and an external oil pipe (3) at the front side of the locking oil pipe (2); A stable connection mechanism is also provided for stably connecting the locking oil pipe (2) and the external oil pipe (3), the stable connection mechanism comprising plug blocks (4) fixedly mounted on the left and right ends of the locking oil pipe (2), and corresponding plug blocks (4) on the left and right sides of the rear end of the external oil pipe (3) are provided with mutually matching card slots (5); An explosion-proof mechanism is also provided for preventing the external oil pipe (3) from bursting. The explosion-proof mechanism comprises a blocking plate (17) slidably inserted on the right end of the locking oil pipe (2), and a fixing plate (18) is fixedly installed on the right end of the blocking plate (17).

2. A hydraulic locking cylinder assembly according to claim 1, characterized in that: Upper and lower clamping blocks (6) are provided on the upper and lower sides of the front part of the locking oil pipe (2) corresponding to the external oil pipe (3). The rear ends of the upper and lower clamping blocks (6) are slidably mounted on the cylinder body (1). Elastic sheets (61) are fixedly mounted on the rear ends of the upper and lower clamping blocks (6).

3. A hydraulic locking cylinder assembly according to claim 2, characterized in that: The left ends of the upper and lower clamping blocks (6) are fixedly mounted with racks (7), a gear shaft (8) is meshed between the racks (7), the rear end of the gear shaft (8) is rotatably mounted on the cylinder body (1), and a torsion spring (9) is sleeved on the outer side of the gear shaft (8).

4. A hydraulic locking cylinder assembly according to claim 2, characterized in that: A driving inclined block (10) is fixedly mounted on the rear side of the upper and lower clamping blocks (6), a push rod (11) is arranged on the right side of the driving inclined block (10), and a movable plate (12) is fixedly mounted on the right end of the push rod (11).

5. A hydraulic locking cylinder assembly according to claim 4, characterized in that: A screw rod (13) is threadedly mounted on the middle portion of the movable plate (12), the rear end of the movable plate (12) is slidably mounted on the cylinder body (1), and the screw rod (13) is rotatably mounted on the cylinder body (1).

6. A hydraulic locking cylinder assembly according to claim 4, characterized in that: A connecting plate (14) is fixedly mounted on the lower end of the driving inclined block (10), and a rear end of the connecting plate (14) is slidably mounted on the locking oil pipe (2). Left and right clamping blocks (15) are fixedly mounted on both left and right sides of the lower end of the connecting plate (14), and two clamping grooves (16) are provided on both left and right sides of the upper end of the external oil pipe (3) corresponding to the left and right clamping blocks (15).

7. The hydraulic locking cylinder assembly according to claim 1, characterized in that: A spring 1 (19) is fixedly mounted on the upper left end of the fixing plate (18), and the left end of the spring 1 (19) is fixedly mounted on the locking oil pipe (2).

8. The hydraulic locking cylinder assembly according to claim 1, characterized in that: A sealing strip (21) is provided on the left end of the fixing plate (18), and a sealing groove (20) is provided on the right end of the locking oil pipe (2) corresponding to the sealing strip (21).

9. The hydraulic locking cylinder assembly according to claim 1, characterized in that: The front end of the cylinder body (1) is located at the lower side of the blocking plate (17), and a stabilizing inclined block (22) is slidably mounted corresponding to the fixing plate (18), and a connecting rod (23) is fixedly mounted at the lower end of the stabilizing inclined block (22).

10. A hydraulic locking cylinder assembly according to claim 9, characterized in that: A support plate (24) is slidably mounted through the lower end of the connecting rod (23), the rear end of the support plate (24) is fixedly mounted on the cylinder body (1), and a second spring (25) is sleeved on the outer side of the connecting rod (23).

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