Anti-torsion thrust cylinder

Abstract

The utility model relates to the technical field of thrust cylinders, and discloses an anti-torsion thrust cylinder which comprises a fixing assembly, a cylinder barrel, a fixing sleeve, a sliding rod, a clamping block, a piston rod, a piston head and a torsion spring, the fixing assembly is arranged on the side portion of the cylinder barrel, and the cylinder barrel is fixedly connected with the shield wall of a shield tunneling machine in the circumferential direction through the fixing assembly. Fixing sleeves are arranged on the two sides of the front end of the cylinder barrel respectively, sliding rods are inserted into the fixing sleeves, arranged in the axial direction of the cylinder barrel and slidably connected with the fixing sleeves, clamping blocks are arranged at the front ends of the sliding rods, the front end of the piston rod extends out of the front end of the cylinder barrel, the piston head is installed at the front end of the piston rod, and the torsion spring is installed in the piston head. The torsion spring is arranged around the axis of the piston rod, and the two ends of the torsion spring extend out of the side of the piston head and are fixedly connected with the clamping block. The hydraulic cylinder is simple in structure and capable of effectively preventing the cylinder barrel and the piston rod from twisting.

Description

Technical Field

[0001] The utility model relates to the technical field of propulsion oil cylinders, in particular to an anti-twist propulsion oil cylinder. Background Art

[0002] The single-cylinder thrust cylinder of the shield machine is prone to twisting in the process of extending forward to compress the segments because there is no anti-twist device. When the thrust cylinder twists, the support shoe connected to the thrust cylinder will have a certain impact on the installation of the tunnel segments. The twisting of the thrust cylinder may cause deviation during the installation of the segments, making it impossible to properly splice the segments. When the segments are not properly spliced, it will cause deviation at the segment joints, affecting the overall stability of the tunnel. At the same time, incorrect splicing of the segments may also affect the deformation of the shield machine's walking track plate. It can be seen that it is necessary to prevent the thrust cylinder from twisting. The existing anti-twist structure uses symmetrical retractable rollers on both sides of the support shoe to support the tail shield of the shield machine. The rollers are easily worn and deformed, and there are certain requirements for the installation angle of the support shoe. The anti-twist device of the support shoe with an incorrect angle will not work. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an anti-twist propulsion oil cylinder which can effectively prevent the cylinder barrel and the piston rod from twisting.

[0004] In order to solve the above technical problems, the utility model provides an anti-torsion propulsion cylinder, including a fixing assembly, a cylinder barrel, a fixing sleeve, a sliding rod, a blocking block, a piston rod, a piston head and a torsion spring. The fixing assembly is arranged on the side of the cylinder barrel, and the cylinder barrel is circumferentially fixedly connected to the shield wall of the shield machine through the fixing assembly. The fixing sleeves are respectively provided on both sides of the front end of the cylinder barrel, and the sliding rod is inserted in the fixing sleeve. The sliding rod is arranged along the axial direction of the cylinder barrel and is slidably connected to the fixing sleeve. The front end of the sliding rod is provided with the blocking block, and the front end of the piston rod extends out of the front end of the cylinder barrel, the piston head is installed at the front end of the piston rod, and the torsion spring is installed inside the piston head. The torsion spring is arranged around the axis of the piston rod, and the two ends of the torsion spring respectively extend out of the side of the piston head and are fixedly connected to the blocking block.

[0005] As a preferred solution of the present invention, a guide groove is provided on the side of the fixing sleeve along the axial direction of the cylinder, and a guide column is provided on the outer side of the sliding rod, and the guide column is slidably matched with the guide groove.

[0006] As a preferred solution of the present invention, the fixing assembly includes a fixing protrusion and a fixing seat, the fixing protrusion is fixed on the side of the cylinder, the fixing seat is provided with a fixing groove that cooperates with the fixing protrusion, and the fixing seat is fixed on the shield wall of the shield machine.

[0007] As a preferred solution of the present invention, the blocking block includes a first block and a second block that are fitted together, the first block and the second block are connected by bolts, the first block is fixedly connected to the front end of the sliding rod, a first groove is provided on the side of the first block close to the second block, and a second groove corresponding to the position of the first groove is provided on the side of the second block close to the first block, the first groove and the second groove are connected to form a connecting groove that cooperates with the end of the torsion spring.

[0008] As a preferred solution of the present invention, the rear end of the piston head is provided with a mounting groove that cooperates with the torsion spring, and the front end of the piston rod is provided with a connecting plate that covers the rear end of the piston head, and the connecting plate is connected to the piston head through a connecting piece.

[0009] As a preferred solution of the present invention, the front end side of the piston head is provided with a first through hole, the rear end of the support shoe is provided with a positioning groove that cooperates with the front end of the piston head, the side of the support shoe is provided with a second through hole aligned with the first through hole, and a fixing pin is inserted into the first through hole and the second through hole.

[0010] The embodiment of the present utility model provides an anti-twist propulsion oil cylinder. Compared with the prior art, its beneficial effects are as follows: the cylinder barrel is fixedly connected to the shield wall of the shield machine circumferentially through a fixing assembly, thereby effectively preventing the cylinder barrel from twisting; since the fixing sleeve is fixed to the side of the cylinder barrel, the sliding rod is slidably connected to the fixing sleeve, the clamping block is fixed to the front end of the sliding rod, the piston head is installed at the front end of the piston rod, and the two ends of the torsion spring extend out of the piston head and are fixedly connected to the clamping block. Therefore, when the piston rod moves and retracts along the axial direction of the cylinder barrel, the sliding rod and the clamping block will move synchronously with the piston rod, thereby ensuring that the clamping block and the end of the torsion spring remain fixedly connected. When the piston rod or the piston head is subjected to a torque of an external force, since the cylinder barrel is fixedly connected to the shield wall of the shield machine circumferentially through the fixing assembly, the clamping block can limit the rotation of the torsion spring, thereby preventing the piston rod and the piston head from twisting; the utility model has a simple structure and can effectively prevent the propulsion oil cylinder from twisting during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 yes Figure 1 A local enlarged view of point A;

[0013] Figure 3 It is a side view of the fixing assembly of the utility model;

[0014] Figure 4 This is a schematic diagram of the connection structure between the fixed sleeve and the sliding rod of the utility model;

[0015] Figure 5 yes Figure 4 sectional view of ;

[0016] Figure 6 It is a cross-sectional view of the piston head of the present utility model;

[0017] Figure 7 This is a schematic diagram of the connection structure of the first block and the second block of the utility model;

[0018] Figure 8 It is a schematic diagram of the structure of the utility model after extension;

[0019] In the figure, 1. fixing assembly; 11. fixing protrusion; 12. fixing seat; 121. fixing groove; 2. cylinder; 3. fixing sleeve; 31. sliding rod; 311. guide column; 32. guide groove; 4. clamping block; 41. first block; 411. first groove; 42. second block; 421. second groove; 43. connecting groove; 5. piston rod; 51. connecting plate; 6. piston head; 61. mounting groove; 7. torsion spring; 8. support shoe; 81. positioning groove; 82. fixing pin; 9. shield wall of shield machine. DETAILED DESCRIPTION

[0020] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in the present invention to indicate positions or positional relationships are based on the positions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] like Figure 1-8As shown, an anti-torsion propulsion oil cylinder of a preferred embodiment of the present invention includes a fixing component 1, a cylinder barrel 2, a fixing sleeve 3, a sliding rod 31, a block 4, a piston rod 5, a piston head 6 and a torsion spring 7. The fixing component 1 is arranged on the side of the cylinder barrel 2, and the cylinder barrel 2 is circumferentially fixedly connected to the shield wall 9 of the shield machine through the fixing component 1. Fixed sleeves 3 are respectively provided on both sides of the front end of the cylinder barrel 2. A sliding rod 31 is inserted into the fixed sleeve 3. The sliding rod 31 is arranged along the axial direction of the cylinder barrel 2 and is slidably connected to the fixed sleeve 3. The sliding rod 31 can slide along the axial direction of the cylinder barrel 2. The front end of the sliding rod 31 is provided with a fixing sleeve 3. There is a clamping block 4, the front end of the piston rod 5 extends out of the front end of the cylinder 2, the piston head 6 is installed at the front end of the piston rod 5, and the torsion spring 7 is installed inside the piston head 6. The torsion spring 7 is arranged around the axis of the piston rod 5, and the two ends of the torsion spring 7 respectively extend out of the side of the piston head 6 and are fixedly connected to the clamping block 4, that is, there is a space for installing the torsion spring 7 inside the piston head 6, and through holes are provided on both sides of the piston head 6 for the two ends of the torsion spring 7 to extend out. The two ends of the torsion spring 7 pass through the through holes one by one and extend out of the side of the piston head 6. Generally, the torsion spring 7 is a bidirectional torsion spring.

[0023] The working principle of this embodiment is as follows: the cylinder barrel 2 is circumferentially fixedly connected to the shield wall 9 of the shield machine through the fixing assembly 1, thereby effectively preventing the cylinder barrel 2 from twisting; since the fixing sleeve 3 is fixed to the side of the cylinder barrel 2, the sliding rod 31 is slidably connected to the fixing sleeve 3, the blocking block 4 is fixed to the front end of the sliding rod 31, and the piston head 6 is installed at the front end of the piston rod 5. The two ends of the torsion spring 7 extend out of the piston head 6 and are fixedly connected to the blocking block 4. Therefore, when the piston rod 5 moves and retracts along the axial direction of the cylinder barrel 2, the sliding rod 31 and the blocking block 4 will move synchronously with the piston rod 5, thereby ensuring the fixed connection between the blocking block 4 and the end of the torsion spring 7. When the piston rod 5 or the piston head 6 is subjected to a torque of an external force, since the cylinder barrel 2 is circumferentially fixedly connected to the shield wall 9 of the shield machine through the fixing assembly 1, the blocking block 4 can limit the rotation of the torsion spring 7, thereby preventing the piston rod 5 and the piston head 6 from twisting; the utility model has a simple structure and can effectively prevent the propulsion cylinder from twisting during operation.

[0024] Exemplarily, a guide groove 32 is provided on the side of the fixed sleeve 3 along the axial direction of the cylinder 2, and the guide groove 32 is connected to the interior of the fixed sleeve 3. A guide column 311 is provided on the outer side of the sliding rod 31, and the guide column 311 slides in cooperation with the guide groove 32. The guide column 311 can slide along the axial direction of the cylinder 2 in the guide groove 32, thereby ensuring that the sliding rod 31 moves along the axis of the cylinder 2.

[0025] Exemplarily, the fixing assembly 1 includes a fixing protrusion 11 and a fixing seat 12. The fixing protrusion 11 is fixed on the side of the cylinder 2. The fixing seat 12 is provided with a fixing groove 121 that cooperates with the fixing protrusion 11. The fixing seat 12 is fixed on the shield wall 9 of the shield machine. Through the cooperation between the fixing protrusion 11 and the fixing groove 121, the circumferential fixed connection between the cylinder 2 and the shield wall 9 of the shield machine is achieved. In this embodiment, two groups of fixing assemblies 1 are provided to ensure the stability of the structure.

[0026] 41 and 42 are connected to each other by bolts, and the first block 41 and the second block 42 are connected by bolts. The first block 41 is fixedly connected to the front end of the sliding rod 31, and the first block 41 is provided with a first groove 411 on the side of the first block 41 close to the second block 42, and the second block 42 is provided with a second groove 421 corresponding to the position of the first groove 411 on the side close to the first block 41. The first groove 411 and the second groove 421 are connected to form a connecting groove 43 that cooperates with the end of the torsion spring 7. It can be understood that the first groove 411 and the second groove 421 are open at one end close to the piston head 6, and the end of the torsion spring 7 passes through the side of the piston head 6 and is inserted into the connecting groove 43 to achieve a fixed connection between the torsion spring 7 and the block 4. During assembly, the first block 41 and the second block 42 are first disassembled and separated, and then the end of the torsion spring 7 is embedded in the first groove 411, and then the second block 42 is connected to the first block 41, thereby facilitating the connection of the torsion spring 7 with the connecting groove 43.

[0027] Exemplarily, the rear end of the piston head 6 is provided with a mounting groove 61 that cooperates with the torsion spring 7. The shape of the mounting groove 61 is adapted to the shape of the torsion spring 7 to facilitate the positioning and installation of the torsion spring 7. The front end of the piston rod 5 is provided with a connecting plate 51 that covers the rear end of the piston head 6. The connecting plate 51 is connected to the piston head 6 through a connecting member (such as a screw) to prevent the torsion spring 7 from falling off.

[0028] Illustratively, a first through hole is provided on the front end side of the piston head 6, a positioning groove 81 is provided on the rear end of the support shoe 8 to cooperate with the front end of the piston head 6, a second through hole is provided on the side of the support shoe 8 to align with the first through hole, and a fixing pin 82 is inserted into the first through hole and the second through hole to facilitate the positioning connection between the piston head 6 and the support shoe 8.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. An anti-torsion propulsion cylinder, characterized in that: The invention comprises a fixing assembly, a cylinder, a fixing sleeve, a sliding rod, a blocking block, a piston rod, a piston head and a torsion spring. The fixing assembly is arranged on the side of the cylinder, and the cylinder is circumferentially fixedly connected to the shield wall of the shield machine through the fixing assembly. The fixing sleeves are respectively provided on both sides of the front end of the cylinder, and the sliding rod is inserted into the fixing sleeve. The sliding rod is arranged along the axial direction of the cylinder and is slidably connected to the fixing sleeve. The front end of the sliding rod is provided with the blocking block, and the front end of the piston rod extends out of the front end of the cylinder, the piston head is installed at the front end of the piston rod, and the torsion spring is installed inside the piston head. The torsion spring is arranged around the axis of the piston rod, and the two ends of the torsion spring respectively extend out of the side of the piston head and are fixedly connected to the blocking block.

2. The anti-torsion propulsion cylinder according to claim 1, characterized in that: A guide groove is provided on the side of the fixing sleeve and is arranged along the axial direction of the cylinder barrel. A guide column is provided on the outer side of the sliding rod. The guide column is slidably matched with the guide groove.

3. The anti-twist propulsion cylinder according to claim 1, characterized in that: The fixing assembly includes a fixing protrusion and a fixing seat. The fixing protrusion is fixed on the side of the cylinder. The fixing seat is provided with a fixing groove that cooperates with the fixing protrusion. The fixing seat is fixed on the shield wall of the shield machine.

4. The anti-torsion propulsion cylinder according to claim 1, characterized in that: The clamping block includes a first block and a second block that are fitted together. The first block and the second block are connected by bolts. The first block is fixedly connected to the front end of the sliding rod. A first groove is provided on a side of the first block close to the second block. A second groove corresponding to the position of the first groove is provided on a side of the second block close to the first block. The first groove and the second groove are connected to form a connecting groove that cooperates with the end of the torsion spring.

5. The anti-twist propulsion cylinder according to claim 1, characterized in that: The rear end of the piston head is provided with a mounting groove that cooperates with the torsion spring, and the front end of the piston rod is provided with a connecting plate that covers the rear end of the piston head. The connecting plate is connected to the piston head through a connecting piece.

6. The anti-twist propulsion cylinder according to claim 1, characterized in that: A first through hole is provided on the front end side of the piston head, a positioning groove is provided on the rear end of the support shoe to cooperate with the front end of the piston head, a second through hole is provided on the side of the support shoe to align with the first through hole, and a fixing pin is inserted into the first through hole and the second through hole.

Images