A cylinder clamping mechanism

Abstract

The utility model relates to the technical field of fixture tooling, and particularly relates to a cylinder clamping mechanism, including two or more than two clamping components, be used for lifting drive all clamping components loose tight simultaneously and provide the lifting guide head of clamping component installation connection, install and connect in the lifting guide head downside and provide the power of lifting for the lifting guide head lifting cylinder assembly, the lifting cylinder assembly includes cylinder body and the cylinder piston rod that stretches out cylinder body from cylinder body, the cylinder piston rod upper end is fixed in the lifting guide head downside, the cylinder body upside is fixed with the guide protection cylinder that provides the lifting guide head lifting direction, and the stability is better.

Description

Technical Field

[0001] This utility model relates to the field of fixture and tooling technology, and in particular to a cylinder clamping mechanism. Background Technology

[0002] In modern automotive production lines, many processes require clamping and positioning of parts. For example, in some welded structures, where a large number of parts are processed, even more clamping operations are needed. Of course, there are many types of existing clamping equipment, and many of them are patented technologies.

[0003] For example, Chinese Patent Application No. 201220708228.2 discloses a single-cylinder double-clamping-arm clamping mechanism, which aims to provide a single cylinder capable of clamping two objects, thereby improving the efficiency of cylinder use. It includes a cylinder, a base plate, a positioning support, and two clamping arms. The cylinder is fixedly connected to the base plate, the positioning support is fixedly mounted on the base plate, one end of each clamping arm is connected to the cylinder piston rod, and the middle of each clamping arm is connected to the positioning support.

[0004] The existing clamping structure is directly driven by a cylinder, which is prone to stability problems. With long-term use, it is prone to deformation and inaccurate positioning. Utility Model Content

[0005] The purpose of this invention is to provide a cylinder clamping mechanism with better stability.

[0006] The above-mentioned objective of this utility model is achieved through the following technical solution: a cylinder clamping mechanism, comprising two or more clamping components, a lifting guide head for simultaneously tightening and loosening all clamping components and for mounting and connecting the clamping components, and a lifting cylinder assembly mounted and connected to the lower side of the lifting guide head and providing power for the lifting and lowering of the lifting guide head. The lifting cylinder assembly includes a cylinder body and a cylinder piston rod extending upward from the cylinder body. The upper end of the cylinder piston rod is fixed to the lower side of the lifting guide head, and a guide protection cylinder for guiding the lifting and lowering of the lifting guide head is fixed to the upper side of the cylinder body.

[0007] As a preferred embodiment of this utility model, the guide protective cylinder is further fixed with an inner guide cylinder for the installation and connection of the clamping assembly and for the lifting guide head to be lifted and lowered.

[0008] As a preferred embodiment of this utility model, the lifting guide head includes a guide mounting cylinder and a downwardly extending lifting mounting column integrally connected to the bottom of the guide mounting cylinder. The diameter of the lifting mounting column is smaller than the outer diameter of the guide mounting cylinder and larger than the inner diameter of the guide mounting cylinder.

[0009] As a preferred embodiment of this utility model, the guide protection cylinder has a first inner hole, a second inner hole, and a third inner hole that are vertically connected and all cylindrical. The diameter of the first inner hole is larger than the diameter of the second inner hole, and the diameter of the second inner hole is larger than the diameter of the third inner hole. The inner guide cylinder is inserted into and fixed in the second inner hole, and the bottom of the inner guide cylinder abuts against the annular step surface formed by the guide protection cylinder at the position where the second and third inner holes are connected. The inner space of the inner guide cylinder forms a fourth inner hole, which is vertically opposite to the third inner hole and has the same diameter. The outer diameter of the guide mounting cylinder is the same as the diameter of the fourth inner hole and the diameter of the third inner hole. The fourth inner hole and the third inner hole are used for inserting the guide mounting cylinder and guiding its lifting and lowering. The third inner hole also provides for inserting the lifting mounting column and the cylinder piston rod. The cylinder piston rod extends into the third inner hole from bottom to top, and the upper end of the cylinder piston rod is fixed to the lower side of the lifting mounting column.

[0010] As a preferred embodiment of the present invention, the clamping assembly has two or more sets arranged in a circumferential array, and each set of the clamping assembly is mounted on the inner guide cylinder and the guide mounting cylinder.

[0011] As a preferred embodiment of the present invention, the inner guide cylinder is provided with a first radial groove extending downward from its upper side and penetrating both the inside and outside in the radial direction, and the guide mounting cylinder is provided with a second radial groove extending downward from its upper side and penetrating both the inside and outside in the radial direction. The number of the first radial groove and the second radial groove are the same and they are both distributed in a circumferential array at intervals, and each pair of the first radial groove and the second radial groove are opposite each other in the radial direction.

[0012] As a preferred embodiment of this utility model, the clamping assembly includes a swing arm capable of swinging up and down relative to the inner guide cylinder and a clamping head fixed to the upper side of the swing arm. The swing arm includes a connecting plate connected between the first radial groove and the second radial groove, and a positioning rotating plate integrally connected to the lower side of the connecting plate, capable of rotating in the first radial groove. A positioning shaft perpendicular to the positioning rotating plate passes through the positioning rotating plate, and the two ends of the positioning shaft pass through the two circumferential groove walls of the first radial groove. At least a portion of the connecting plate is located in the second radial groove, and a connecting shaft perpendicular to the connecting plate passes through this portion. The two ends of the connecting shaft pass through the two circumferential groove walls of the second radial groove. The connecting plate has a strip-shaped sliding hole for the connecting shaft to pass through, which allows the connecting plate to generate displacement components in the horizontal and vertical directions along the connecting shaft when the connecting shaft is raised and lowered. The positioning rotating plate has a positioning hole for the positioning shaft to pass through, and the diameter of the positioning shaft is the same as the diameter of the positioning hole.

[0013] As a preferred embodiment of this invention, the linkage plate is horizontal when clamped, and the position of the positioning shaft is lower than the position of the linkage shaft.

[0014] As a preferred embodiment of this utility model, a positioning pin for positioning the positioning shaft is provided on the inner guide cylinder from top to bottom.

[0015] As a preferred embodiment of this utility model, the clamping head includes a mounting connecting block fixed to the upper side of the connecting plate and a claw integrally connected to the radially outer portion of the mounting connecting block.

[0016] The beneficial effects of this utility model are: the lifting structure is more compact, the coverage is better, the guidance is better, the force is more optimized, it is suitable for the simultaneous design of multiple clamping parts, and it can still maintain good precision. The long-term structural stability is also higher, and it is not easy to cause deformation and other problems. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the cylinder clamping mechanism in the embodiment in the clamping state;

[0018] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure after removing the cover plate;

[0019] Figure 3 yes Figure 2 A three-dimensional structural diagram of the central structure after the guide and protective cylinders have been removed;

[0020] Figure 4 yes Figure 3 A schematic diagram of the three-dimensional structure from an upper perspective;

[0021] Figure 5 yes Figure 3 A three-dimensional structural diagram of the central structure after the inner guide cylinder is removed;

[0022] Figure 6 yes Figure 5 A schematic diagram of the three-dimensional structure from an upper perspective;

[0023] Figure 7 yes Figure 5 A three-dimensional structural diagram of the central structure after the lifting guide head has been removed;

[0024] Figure 8 yes Figure 7 A schematic diagram of the three-dimensional structure after the clamping components are arranged;

[0025] Figure 9 yes Figure 1 A three-dimensional structural diagram of the guide protection cylinder in the structure;

[0026] Figure 10 yes Figure 1 A three-dimensional structural diagram of the inner guide cylinder in the structure;

[0027] Figure 11 yes Figure 1 A three-dimensional structural diagram of the lifting guide head in the structure;

[0028] Figure 12 yes Figure 1 A three-dimensional structural diagram of the assembled inner guide cylinder and lifting guide head;

[0029] Figure 13 yes Figure 12 A schematic diagram of the three-dimensional structure from a lower perspective;

[0030] Figure 14 yes Figure 12 A three-dimensional structural diagram of the middle structure after the clamping components are assembled.

[0031] Figure 15 yes Figure 14 A three-dimensional structural diagram of the central structure after the inner guide cylinder is removed;

[0032] Figure 16 yes Figure 15 A three-dimensional structural diagram of the clamping assembly in the structure;

[0033] Figure 17 This is a three-dimensional structural diagram of the cylinder clamping mechanism in the embodiment in the relaxed state. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings.

[0035] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present utility model.

[0036] Examples, such as Figure 1-17As shown, a cylinder clamping mechanism includes two or more clamping components, a lifting guide head 1 for simultaneously tightening and loosening all clamping components and for mounting and connecting the clamping components, and a lifting cylinder assembly installed and connected to the lower side of the lifting guide head 1 to provide power for the lifting and lowering of the lifting guide head 1. In this embodiment, the design of the lifting guide head 1 is added. Instead of using the lifting cylinder to directly drive the clamping components, the lifting guide head 1 is lifted and lowered by the lifting cylinder assembly. Then, the lifting and lowering of the lifting guide head 1 drives all clamping components to simultaneously loosen or tighten. In this embodiment, the lifting guide head 1 is locked when it is in a high position and loosens when it is lowered. Specifically, the lifting cylinder assembly includes a cylinder body 21 and a cylinder piston rod 22 extending upward from the cylinder body 21. Further, the upper end of the cylinder piston rod 22 is fixed to the lower side of the lifting guide head 1. A guide protection cylinder 3 is fixed to the upper side of the cylinder body 21 to guide the lifting guide head 1 in its vertical movement. The cylinder body 21 and the guide protection cylinder 3 can be fixedly connected at their periphery by bolts passing through them vertically, or by other existing fixing methods. The guide protection cylinder 3 provides peripheral protection and, more importantly, guides the lifting guide head 1 in its vertical movement, maintaining the straightness of the lifting motion. This embodiment changes the traditional direct clamping structure of the cylinder piston rod 22 by adding a guiding structure and a peripheral guiding protection structure. This not only protects the cylinder piston rod 22 and its internal structure but also ensures the straightness of the lifting motion. Additionally, the lifting guide head 1 can accommodate more clamping components for positioning and processing more workpieces. Further implementation methods are described below.

[0037] The guide cylinder 3 is further equipped with an inner guide cylinder 4, which serves as the mounting and connecting point for clamping components and the guide for the lifting head 1. The inner guide cylinder 4 is designed to accommodate multiple clamping components, facilitate the guidance of the lifting head 1, and provide support for the clamping operations of the clamping components. The inner guide cylinder 4 is cylindrical or approximately cylindrical, ensuring that the vertical projection of its inner space is circular to guarantee guiding accuracy. Both the guide cylinder 3 and the inner guide cylinder 4 can be constructed of metal or other rigid materials, such as steel.

[0038] Preferably, the lifting guide head 1 includes a guide mounting cylinder 11 and a downwardly extending lifting mounting column 12 integrally connected to the bottom of the guide mounting cylinder 11. The lifting guide head 1 can also be made of steel or other rigid materials. The diameter of the lifting mounting column 12 is smaller than the outer diameter of the guide mounting cylinder 11 and larger than the inner diameter of the guide mounting cylinder 11. The guide mounting cylinder 11 has a cylindrical structure, and the lifting mounting column 12 has a cylindrical structure. Both are coaxial and extend in the vertical direction. The guide mounting cylinder 11 must be able to achieve effective lifting guidance both within the inner space of the inner guide cylinder 4 and within the guide protection cylinder 3.

[0039] The specific design is as follows: The guide protection cylinder 3 has a first inner hole 31, a second inner hole 32, and a third inner hole 33, all of which are cylindrical and interconnected vertically. The diameter of the first inner hole 31 is larger than that of the second inner hole 32, and the diameter of the second inner hole 32 is larger than that of the third inner hole 33. The first inner hole 31, the second inner hole 32, and the third inner hole 33 are coaxial and extend vertically. The inner guide cylinder 4 is inserted into and fixed in the second inner hole 32, and the bottom of the inner guide cylinder 4 abuts against the annular step surface 30 formed at the position where the second inner hole 32 and the third inner hole 33 connect in the guide protection cylinder 3. A bolt can be inserted through the upper side of the inner guide cylinder 4, and the bolt is screwed into the solid part of the guide protection cylinder 3 from the annular step surface 30 downwards, realizing a threaded detachable fixed connection for easy disassembly and assembly. Of course, corresponding threaded holes are opened on both, which is also a conventional fixing method. Of course, other fixing methods such as welding can also be used for fixed connection. Furthermore, the inner space of the inner guide cylinder 4 forms a fourth inner hole 40. The fourth inner hole 40 and the third inner hole 33 are vertically opposite each other and have the same diameter. The outer diameter of the guide mounting cylinder 11 is the same as the diameter of both the fourth inner hole 40 and the third inner hole 33. The fourth inner hole 40 is on top, and the third inner hole 33 is below, and the two are vertically connected and coaxial. Of course, the fact that the outer diameter of the guide mounting cylinder 11 is the same as the diameter of the fourth inner hole 40 or the diameter of the third inner hole 33 is not absolute in this embodiment, or in actual construction, and tolerances are allowed. Moreover, for smooth lifting and lowering, the outer diameter of the guide mounting cylinder 11 should preferably be slightly smaller than the diameter of the fourth inner hole 40, and the average gap between the two should be controlled within 0.2 mm. Therefore, "same" here can be understood as having a small error. Accordingly, the fourth inner hole 40 and the third inner hole 33 are used for the guide mounting cylinder 11 to be inserted and guided for lifting and lowering. The third inner hole 33 also provides a space for the lifting mounting column 12 and the cylinder piston rod 22 to be inserted. Both the lifting mounting column 12 and the cylinder piston rod 22 can be raised and lowered within the third inner hole 33. The cylinder piston rod 22 extends into the third inner hole 33 from bottom to top. The diameter of the cylinder piston rod 22 and the diameter of the lifting mounting column 12 are both smaller than the third inner hole 33, and a large gap can be maintained to facilitate installation and raising / lowering.

[0040] The upper end of the cylinder piston rod 22 is fixed to the lower side of the lifting mounting column 12. A bolt can be inserted downwards from the inner cylinder space of the guide mounting cylinder 11 into the lifting mounting column 12 and simultaneously into the upper part of the cylinder piston rod 22, achieving a detachable threaded connection. Of course, corresponding threaded holes can be made on the lifting mounting column 12 and the cylinder piston rod 22, with the threaded holes located in the central area of ​​both and extending vertically coaxially with both. Alternatively, the upper ends of the lifting mounting column 12 and the cylinder piston rod 22 can be fixed using other existing fixing methods.

[0041] The clamping components are arranged in two or more sets in a circumferential array, and each set of clamping components is mounted on the inner guide cylinder 4 and the guide mounting cylinder 11. In this embodiment, the clamping components are preferably three or four sets, which is more numerous and the structure is relatively stable.

[0042] Furthermore, the inner guide cylinder 4 has a first radial groove 51 extending downwards from its upper side and radially penetrating both the inside and outside. The guide mounting cylinder 11 has a second radial groove 52 extending downwards from its upper side and radially penetrating both the inside and outside. The number of the first radial grooves 51 and the second radial grooves 52 are the same, and they are all distributed in a circumferential array at intervals. Each pair of first radial grooves 51 and second radial grooves 52 is radially opposite to each other. In this embodiment, radial and circumferential refer to the radial and circumferential directions of the inner guide cylinder 4, while the radial and circumferential directions of the guide mounting cylinder 11 are consistent with those of the inner guide cylinder 4 because they are coaxial. The number of first radial grooves 51 and the number of clamping components are also equal, and the clamping components correspond one-to-one with the first radial grooves 51 and the second radial grooves 52.

[0043] In this embodiment, a preferred structural design for the clamping assembly is provided as follows: The clamping assembly includes a swing arm that can swing up and down relative to the inner guide cylinder 4 and a clamping head fixed on the upper side of the swing arm. Both the swing arm and the clamping head can be made of steel. The swing arm includes a connecting plate 61 connected between the first radial groove 51 and the second radial groove 52 and a positioning rotating plate 62 integrally connected to the lower side of the connecting plate 61 that can rotate in the first radial groove 51. The connecting plate 61 and the positioning rotating plate 62 can be cuboid or approximately cuboid in shape, and the ends can be ground into an arc shape.

[0044] Furthermore, a positioning shaft 63 perpendicular to the positioning rotating plate 62 is passed through the positioning rotating plate 62. The plate surfaces of the positioning rotating plate 62 on both circumferential sides are perpendicular to the positioning shaft 63. When the connecting plate 61 is horizontal, it extends radially. The positioning shaft 63 is horizontal and perpendicular to the positioning rotating plate 62. The two ends of the positioning shaft 63 are respectively inserted into the circumferential side walls of the first radial groove 51. Correspondingly, at least a portion of the connecting plate 61 is located in the second radial groove 52, and a connecting shaft 64 perpendicular to the connecting plate 61 is passed through this portion. The two ends of the connecting shaft 64 are respectively inserted into the circumferential side walls of the second radial groove 52. The connecting plate 61 has openings for the connecting shaft 64 to pass through and for the connecting shaft 64 to move up and down. A strip-shaped sliding hole 610 is provided to allow the connecting plate 61 to generate displacement components in the horizontal and vertical directions along the connecting shaft 64. The positioning rotating plate 62 has a positioning hole 620 through which the positioning shaft 63 passes. The diameter of the positioning shaft 63 is the same as the diameter of the positioning hole 620. The horizontal and vertical positions of the positioning shaft 63 are restricted, but the connecting shaft 64 moves up and down with the guide mounting cylinder 11, changing its vertical position. Therefore, the design of the strip-shaped sliding hole 610 is necessary. The radial length of the strip-shaped sliding hole 610 in the horizontal state is preferably more than three times the diameter of the connecting shaft 64. The height of the strip-shaped sliding hole 610 can be equal to or slightly larger than the diameter of the connecting shaft 64 by 1-2 mm. The strip-shaped sliding hole 610 extends perpendicularly to the direction of extension of the connecting plate 61. The positioning shaft 63 is stationary relative to the inner guide cylinder 4, while the connecting shaft 64 is stationary relative to the guide mounting cylinder 11, but can move up and down relative to the inner guide cylinder 4.

[0045] Furthermore, the connecting plate 61 is horizontal when clamped, and the position of the positioning shaft 63 is lower than the position of the connecting shaft 64. In this embodiment, the connecting plate 61 is in a clamped state when it is horizontal, and in a relaxed state when the part of the connecting plate 61 on the side of the second radial groove 52 descends and the connecting plate 61 tilts inward and downward. That is, in the relaxed state, the radially outer side of the connecting plate 61 tilts upward, and the radially inner end follows the guide mounting cylinder 11 to rise. The radially outer side of the connecting plate 61 swings downward to perform the workpiece clamping operation. The lifting and lowering is driven by the power output of the cylinder piston rod 22, which drives the lifting mounting column 12 and the guide mounting cylinder 11. Finally, the connecting shaft 64 drives the connecting plate 61 to complete the horizontal clamping and downward tilting relaxation operation. The design of the strip sliding hole 610 and other features enables the linkage design.

[0046] Preferably, the inner guide cylinder 4 is provided with a positioning pin 44 for positioning the positioning shaft 63 from top to bottom. The positioning pin can be a bolt. The inner guide cylinder 4 has a threaded hole from top to bottom leading to the position of the positioning shaft 63. Of course, the inner guide cylinder 4 has horizontal holes for the positioning shaft 63 to pass through, and these holes are connected to the threaded holes through which the positioning pin passes. Then, a groove or keyway is provided on the positioning shaft 63, so that the lower end of the positioning pin 44 can be inserted into these grooves to effectively limit the positioning shaft 63 in the horizontal direction, and the instability caused by the positioning shaft slipping out or moving will not occur. Here, the two ends of all the positioning shafts of different clamping assemblies are generally far apart, and there is no mutual end limit. Moreover, the holes in the inner guide cylinders 4 where different positioning shafts 63 are located do not cross each other for mutual limit due to the distance. Therefore, the positioning pin 44 is a relatively reliable design. Similarly, the linkage shaft 64 can also be limited to horizontal movement by designing a positioning pin 44 on the guide mounting cylinder 11. However, since the guide mounting cylinder 11 is radially more inward, or rather, the inner and outer diameters are both smaller, in this case, if there are three sets of clamping components, the connecting shaft 64 will form a triangular or approximately triangular arrangement structure when the size is small. If the ends can abut against each other and limit each other, the structure design of the locating pin is not required.

[0047] Preferably, the clamping head includes a mounting connecting block 71 fixed to the upper side of the connecting plate 61 and a claw 72 integrally connected to the radially outer part of the mounting connecting block 71. The mounting connecting block 71 can be a rectangular steel block and can be fixed to the upper side of the connecting plate 61 by existing threaded connection or welding methods. The mounting connecting block 71 extends outward from the connecting plate 61 in the radial direction, and the claw 72 is integrally connected to the end of the extension. The claw 72 can preferably be a downwardly protruding block structure or a curved hook structure, etc., and different shapes can be selected for different workpieces.

[0048] In addition, the shape of the outer periphery of the guide cylinder 3 can be designed as follows: the outer periphery of the third inner hole 33 can be square, the outer periphery of the second inner hole 32 can be an inverted cone, and the outer periphery of the first inner hole 31 can be circular. Therefore, the part of the guide cylinder 3 located at the position of the first inner hole 31 is an annular ring. This ring can be used with a clamping head to clamp and release the tooling. Moreover, the diameter of the first inner hole 31 should be larger than the outer diameter of the inner guide cylinder 4, so there will be a larger annular space area, which facilitates the partial insertion of some workpieces. In addition, a circular cover plate can be installed on the upper side of the inner guide cylinder 4. The cover plate needs to have corresponding grooves so that it will not be blocked when the connecting plate 61 swings up and down.

[0049] Through the various designs described above, the stability of lifting, clamping, and releasing is improved, positioning accuracy is also enhanced, and the number of workpieces processed simultaneously can be increased, resulting in a significant improvement in both efficiency and quality.

[0050] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A cylinder clamping mechanism, characterized in that, It includes two or more clamping components, a lifting guide head (1) for lifting and driving all clamping components to tighten and loosen simultaneously and for mounting and connecting the clamping components, and a lifting cylinder assembly installed and connected to the lower side of the lifting guide head (1) to provide power for lifting and lowering the lifting guide head (1). The lifting cylinder assembly includes a cylinder body (21) and a cylinder piston rod (22) extending upward from the cylinder body (21). The upper end of the cylinder piston rod (22) is fixed to the lower side of the lifting guide head (1), and a guide protection cylinder (3) is fixed to the upper side of the cylinder body (21) to guide the lifting and lowering of the lifting guide head (1).

2. The cylinder clamping mechanism according to claim 1, characterized in that, The guide protection cylinder (3) is also fixed with an inner guide cylinder (4) for the installation and connection of the clamping assembly and for the lifting guide head (1) to be lifted and guided.

3. The cylinder clamping mechanism according to claim 2, characterized in that, The lifting guide head (1) includes a guide mounting cylinder (11) and a downwardly extending lifting mounting column (12) integrally connected to the bottom of the guide mounting cylinder (11). The diameter of the lifting mounting column (12) is smaller than the outer diameter of the guide mounting cylinder (11) and larger than the inner diameter of the guide mounting cylinder (11).

4. The cylinder clamping mechanism according to claim 3, characterized in that, The guide protection cylinder (3) has a first inner hole (31), a second inner hole (32), and a third inner hole (33) that are cylindrical and connected vertically. The diameter of the first inner hole (31) is larger than that of the second inner hole (32), and the diameter of the second inner hole (32) is larger than that of the third inner hole (33). The inner guide cylinder (4) is inserted into and fixed in the second inner hole (32), and the bottom of the inner guide cylinder (4) abuts against the annular step surface (30) formed by the guide protection cylinder (3) at the position where the second inner hole (32) and the third inner hole (33) are connected. The inner space of the inner guide cylinder (4) forms a fourth inner hole. The inner hole (40) is vertically opposite to the third inner hole (33) and has the same diameter. The outer diameter of the guide mounting cylinder (11) is the same as the diameter of the fourth inner hole (40) and the diameter of the third inner hole (33). The fourth inner hole (40) and the third inner hole (33) are used for the guide mounting cylinder (11) to be inserted and raised and lowered. The third inner hole (33) is also used for the lifting mounting column (12) and the cylinder piston rod (22) to be inserted. The cylinder piston rod (22) extends into the third inner hole (33) from bottom to top. The upper end of the cylinder piston rod (22) is fixed to the lower side of the lifting mounting column (12).

5. A cylinder clamping mechanism according to claim 4, characterized in that, The clamping components are arranged in two or more groups in a circumferential array, and each group of clamping components is mounted on the inner guide cylinder (4) and the guide mounting cylinder (11).

6. The cylinder clamping mechanism according to claim 5, characterized in that, The inner guide cylinder (4) has a first radial groove (51) that extends downward from its upper side and penetrates both inside and outside in the radial direction. The guide mounting cylinder (11) has a second radial groove (52) that extends downward from its upper side and penetrates both inside and outside in the radial direction. The number of the first radial groove (51) and the second radial groove (52) are the same and they are distributed in a circumferential array at intervals. Each pair of first radial grooves (51) and second radial grooves (52) are opposite each other in the radial direction.

7. A cylinder clamping mechanism according to claim 6, characterized in that, The clamping assembly includes a swing arm that can swing up and down relative to the inner guide cylinder (4) and a clamping head fixed to the upper side of the swing arm. The swing arm includes a connecting plate (61) connected between the first radial groove (51) and the second radial groove (52) and a positioning rotating plate (62) integrally connected to the lower side of the connecting plate (61) that can rotate in the first radial groove (51). A positioning shaft (63) perpendicular to the positioning rotating plate (62) is provided on the positioning rotating plate (62). The two ends of the positioning shaft (63) are respectively provided in the two side walls of the first radial groove (51) in the circumferential direction. At least a part of the connecting plate (61) is located in the... A connecting shaft (64) perpendicular to the connecting plate (61) is provided in the second radial groove (52) and on this part. The two ends of the connecting shaft (64) are respectively provided in the two side walls of the second radial groove (52) in the circumferential direction. The connecting plate (61) is provided with a strip-shaped sliding hole (610) for the connecting shaft (64) to pass through and for the connecting plate (61) to generate displacement components in the horizontal and vertical directions along the connecting shaft (64) when the connecting shaft (64) is raised and lowered. The positioning rotating plate (62) is provided with a positioning hole (620) for the positioning shaft (63) to pass through. The diameter of the positioning shaft (63) is the same as the diameter of the positioning hole (620).

8. A cylinder clamping mechanism according to claim 7, characterized in that, When the linkage plate (61) is clamped, it is horizontal, and the position of the positioning shaft (63) is lower than the position of the linkage shaft (64).

9. A cylinder clamping mechanism according to claim 7, characterized in that, The inner guide cylinder (4) is provided with a positioning pin (44) for positioning the positioning shaft (63) from top to bottom.

10. A cylinder clamping mechanism according to claim 7, characterized in that, The clamping head includes a mounting connecting block (71) fixed on the upper side of the connecting plate (61) and a claw (72) integrally connected to the radially outer part of the mounting connecting block (71).

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