A hydraulic clamping device for a fully hydraulic steering gear

Abstract

The present invention provides a hydraulic clamping device for a fully hydraulic steering gear. Through a hydraulic amplifying device and a hydraulic clamping device, the device can be quickly installed on a lathe or a special tooling to realize rapid clamping of thin-walled workpieces. When processing thin-walled workpieces, the clamping force can be adjusted and fixed by adjusting the pressure adjusting bolt. The pressure in the pressurizing chamber can be adjusted according to the hardness of different batches of parts themselves, by adjusting the pressure adjusting bolt to push the pressurizing piston, thereby providing a suitable clamping force and realizing clamping of different batches and workpieces with different hardnesses. The device has strong applicability to the hardness difference of the processed parts themselves.

Description

Technical Field

[0001] The invention relates to the technical field of automated tooling and equipment, in particular to a hydraulic clamping device for a fully hydraulic steering gear. Background Art

[0002] As a relatively precision-machined part, thin-walled parts have high requirements for the surface. During the processing, manual clamps are currently used to clamp thin-walled parts. However, since manual clamps cannot control the force, they will cause the thin-walled parts to be compressed and deformed, resulting in inconsistent processing positioning and processing allowances of thin-walled parts, and the final processing accuracy of the inner hole cannot be guaranteed. In addition, due to manual clamping, it is impossible to realize the automation of processing and loading and unloading, which reduces the processing efficiency of thin-walled parts and the product dimensional accuracy. Summary of the invention

[0003] The invention provides a hydraulic clamping device for a fully hydraulic steering gear, which can prevent compression deformation of thin-walled parts during machining, avoid damage to the clamping parts of the parts, improve machining accuracy, realize automatic clamping, and improve machining efficiency.

[0004] The present invention adopts the following technical scheme: a fully hydraulic steering gear hydraulic clamping device, which mainly includes a hydraulic amplifying device, a hydraulic clamping device and a shell, wherein the shell mainly includes a cylinder sleeve and a cylinder body, the cylinder sleeve and the cylinder body are concentrically arranged, the hydraulic amplifying device is provided with a connecting plate, one end face of the connecting plate is connected to the hydraulic power chuck of the lathe, and the outer ring of the other end face of the connecting plate is fixedly connected to the cylinder sleeve and the cylinder body through a connecting piece in turn,

[0005] A guide column is horizontally connected to the center of the other end surface of the connecting plate. The guide column is located at the axial center position inside the cylinder sleeve. A pressure piston is sleeved on the outside of the guide column. The inner hole of the pressure piston makes axial movement on the surface of the guide column. A pressure chamber is provided between the other side surface of the connecting plate and one side of the pressure piston. The power source oil outlet of the lathe hydraulic power chuck is connected to the pressure chamber through the oil pipeline provided on the connecting plate. The pressure chamber and the pressure piston are both located in the cylinder sleeve. The outer circle of the pressure piston makes linear movement in the cylinder sleeve.

[0006] The cylinder body is provided with a pressure chamber, and a pressure piston is horizontally arranged at the upper and lower parts of the pressure chamber. The pressure piston makes a reciprocating linear motion in the pressure chamber, and one end of the upper pressure piston and one end of the lower pressure piston are connected to the other side of the pressure-taking piston, and the other ends of the two pressure pistons are provided with an adjusting spring, one end of each adjusting spring is in contact with the end face of the other end of the corresponding pressure piston, and the other end of the upper adjusting spring is respectively sleeved on the pressure adjusting bolt on the upper part of the cylinder body, and the other end of the lower adjusting spring is respectively sleeved on the pressure adjusting bolt on the lower part of the cylinder body. The pressure adjusting bolt is rotated to compress the adjusting spring and then push the pressure piston to move. A clamping hole is set at the axial center inner hole of the cylinder body, and an elastic sleeve is inserted in the clamping hole. The thin-walled workpiece to be processed is placed in the elastic sleeve, and an oil groove combination is distributed on the surface of the elastic sleeve. The upper part of the pressure chamber is communicated with the oil groove combination of the elastic sleeve through the upper oil path, and the lower part of the pressure chamber is communicated with the oil groove combination of the elastic sleeve through the lower oil path.

[0007] Furthermore, an X-shaped sealing ring is provided between one end face of the connecting plate and the hydraulic power chuck of the lathe, and the X-shaped sealing ring is placed in the mounting hole between the connecting plate and the hydraulic power chuck of the lathe. The center of the other end face of the connecting plate and the guide column are connected by interference fit. An oil filling port I is provided on the upper part of the connecting plate, and the oil filling port I is connected to the oil pipeline. When the oil filling is completed, a leak plug I is placed in the oil filling port I.

[0008] Furthermore, the guide column is provided with a plurality of support rings I, each support ring I is covered with an O-ring I, a plurality of O-rings I are located between the inner hole of the pressure-taking piston and the surface of the guide column, and a sealing ring I is covered at the rear of the guide column.

[0009] Furthermore, the outer ring of the pressure-taking piston is distributed with a plurality of support rings II, each support ring II is sleeved with an O-type sealing ring II, and the plurality of O-type sealing rings II are located between the outer circle of the pressure-taking piston and the inner wall of the cylinder sleeve.

[0010] Furthermore, the upper part of the other side of the pressure-taking piston is connected with one end of the corresponding upper pressure-adding piston by an interference fit, and the lower part of the other side of the pressure-taking piston is connected with one end of the corresponding lower pressure-adding piston by an interference fit.

[0011] Furthermore, the upper pressure piston and the lower pressure piston are covered with sealing rings I.

[0012] Furthermore, the upper pressure adjusting bolt and the lower pressure adjusting bolt are respectively installed horizontally on the upper and lower parts of the tail of the cylinder body through threaded cooperation, the upper pressure adjusting bolt is concentrically arranged with the upper adjusting spring and the upper pressurizing piston in turn, the lower pressure adjusting bolt is concentrically arranged with the lower adjusting spring and the lower pressurizing piston in turn, an O-ring III is sleeved on each pressure adjusting bolt, and each O-ring III is located between the pressure adjusting bolt and the cylinder body.

[0013] Further, the oil groove combination of the elastic sleeve mainly includes transverse grooves, which are distributed on the surface of the elastic sleeve, or the oil groove combination of the elastic sleeve mainly includes transverse grooves, which are distributed on the surface of the elastic sleeve, and two longitudinal grooves are symmetrically distributed in the transverse groove, or the oil groove combination of the elastic sleeve mainly includes transverse grooves, and a plurality of strip-shaped guide protrusions are evenly distributed in the transverse direction in the transverse groove, and a gap is provided between every two guide protrusions.

[0014] Furthermore, an oil filling port II is provided on the top of the cylinder body, and the oil filling port II is communicated with the pressurized chamber. After the oil filling is completed, a leak plug II is installed in the oil filling port II.

[0015] Furthermore, an O-type sealing ring IV is provided between the elastic sleeve and the cylinder body.

[0016] The present invention has the following beneficial effects: after adopting the above technical scheme, the present invention can be quickly installed on a lathe or a special tooling through a hydraulic amplification device and a hydraulic clamping device, so as to realize the rapid clamping of thin-walled workpieces. When processing thin-walled workpieces, the clamping force can be adjusted and fixed by adjusting the pressure adjusting bolt. According to the hardness of different batches of parts, the pressure adjusting bolt can be adjusted to push the pressurizing piston to realize the pressure adjustment of the pressurizing chamber, provide a suitable clamping force, realize the clamping of different batches and different workpiece hardness, and have strong applicability to the hardness difference of the processed parts themselves. The elastic sleeve and cylinder body structure adopted by the present invention are simple, and the elastic sleeve is installed in the cylinder body in the form of plug-in, which can realize rapid switching to adapt to the processing of different workpieces, is easy to replace, can adapt to the clamping of various different specifications of parts, is easy to realize automatic clamping, shortens the production preparation time, improves the clamping efficiency, and shortens the processing time. The power source oil outlet of the hydraulic power chuck of the lathe of the present invention is connected with the pressure taking chamber through the oil pipeline provided on the connecting plate, so that the pressure taking piston movement in the hydraulic amplification device can be realized. The present invention realizes two-stage hydraulic control by the movement of the pressurizing piston connected to the pressure-taking piston, and realizes pressurization through the pressurizing chamber and the pressurizing piston, converting low pressure into high pressure, so that the elastic sleeve is evenly compressed and deformed, forming a clamping mechanism, and can realize fast and uniform clamping of the circumferential surface of the thin-walled workpiece. The regulating spring of the present invention can realize the rapid return of the pressurizing piston, realize the rapid withdrawal of the clamping force of the parts, and facilitate the rapid up and down of the workpiece. The present invention is provided with a combination of oil grooves of different structures on the outer circle of the clamping elastic sleeve, so that the change of hydraulic clamping force can be realized, the clamping points of different workpieces can be matched, and the applicability of the clamping device can be improved. In summary, the present invention has good processability, practicality and adaptability. The present invention has reliable clamping, and the appropriate clamping force is given to the thin-walled workpiece through the hydraulic system, which will not cause deformation of the workpiece and surface damage. During the workpiece processing process, the deformation of the thin-walled workpiece itself is minimized, and the influence on the workpiece processing accuracy is reduced. The elastic sleeve and the cylinder body have a simple structure and are easy to replace. They can quickly adapt to the clamping of parts of various specifications, improve the efficiency of part clamping, shorten the production preparation time, and facilitate automated processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2It is a schematic structural diagram of the connection disk of the present invention.

[0020] Figure 3 This is a schematic diagram of the elastic sleeve structure according to the first embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the elastic sleeve structure of the second embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the elastic sleeve structure of embodiment 3 of the present invention. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0024] Embodiment 1, in Figure 1 , Figure 2 and Figure 3The present invention provides a hydraulic clamping device for a fully hydraulic steering gear, which mainly includes a hydraulic amplifying device, a hydraulic clamping device and a shell. The shell mainly includes a cylinder sleeve 4 and a cylinder body 11. The cylinder sleeve 4 and the cylinder body 11 are concentrically arranged. The hydraulic amplifying device is provided with a connecting plate 1. One end face of the connecting plate 1 is connected to the hydraulic power chuck of the lathe. The outer ring of the other end face of the connecting plate 1 is fixedly connected with the cylinder sleeve 4 and the cylinder body 11 in turn through a connecting piece 21. An O-type sealing ring V3 is provided between the other end face of the connecting plate 1 and the cylinder sleeve, and an O-type sealing ring VI35 is provided between the cylinder sleeve and the cylinder body. The connecting piece used in this embodiment is a bolt. A guide column 5 is horizontally connected to the center of the other end face of the connecting plate 1. The guide column 5 is located at the axial center position inside the cylinder sleeve 4. The connecting piece of this embodiment An X-shaped sealing ring 22 is provided between one end face of the connecting plate 1 and the hydraulic power chuck of the lathe. The X-shaped sealing ring 22 is placed in the mounting hole between the connecting plate 1 and the hydraulic power chuck of the lathe. The center of the other end face of the connecting plate 1 is connected to the guide column 5 by interference fit. An oil filling port Ⅰ31 is provided on the upper part of the connecting plate 1. The oil filling port Ⅰ31 is connected to the oil pipeline 23. When the oil filling is completed, a plugging port Ⅰ2 is placed in the oil filling port Ⅰ31. The plugging port Ⅰ2 of this embodiment adopts an NPT1 / 8 type plugging port. A pressure-taking piston 10 is sleeved on the outside of the guide column 5. The inner hole of the pressure-taking piston 10 makes axial movement on the surface of the guide column 5. A pressure-taking chamber 24 is provided between the other side of the connecting plate 1 and one side of the pressure-taking piston 10. The power source oil outlet of the hydraulic power chuck of the lathe The connecting plate 1 is connected to the pressure chamber 24 through the oil pipeline 23 provided on the connecting plate 1. The pressure chamber 24 and the pressure piston 10 are both located in the cylinder sleeve 4. The outer circle of the pressure piston 10 performs linear motion in the cylinder sleeve 4. A plurality of support rings Ⅰ9 are distributed on the guide column 5. Two support rings Ⅰ9 are distributed on the guide column 5 of the present embodiment. An O-type sealing ring Ⅰ8 is sleeved on each support ring Ⅰ9. The two O-type sealing rings Ⅰ8 are located between the inner hole of the pressure piston 10 and the surface of the guide column 5. A sealing ring Ⅰ19 is sleeved on the rear part of the guide column 5. A plurality of support rings Ⅱ7 are distributed on the outer ring of the pressure piston 10. Two support rings Ⅱ7 are distributed on the outer ring of the pressure piston 10 of the present embodiment. An O-type sealing ring Ⅱ6 is sleeved on each support ring Ⅱ7. The two O-type sealing rings Ⅱ6 are located between the inner hole of the pressure piston 10 and the surface of the guide column 5. A pressurizing chamber 25 is provided inside the cylinder body 11 between the outer circle of the plug 10 and the inner wall of the cylinder sleeve 4. Pressurizing pistons 20 are horizontally provided at the upper and lower parts of the pressurizing chamber 25. The pressurizing pistons 20 perform reciprocating linear motion in the pressurizing chamber 25. One end of the upper pressurizing piston 20 and one end of the lower pressurizing piston 20 are both connected to the other side of the pressure-taking piston 10. The upper part of the other side of the pressure-taking piston 10 of this embodiment and one end of the corresponding upper pressurizing piston 20 are connected by interference fit. The lower part of the other side of the pressure-taking piston 10 and one end of the corresponding lower pressurizing piston 20 are connected by interference fit. The upper and lower pressurizing pistons 20 of this embodiment are provided with sealing rings Ⅰ18, and the other ends of the two pressurizing pistons 20 are provided with adjusting springs 17.One end of each adjusting spring 17 contacts the end surface of the other end of the corresponding pressurizing piston 20, the other end of the upper adjusting spring 17 is respectively sleeved on the pressure adjusting bolt 16 at the upper part of the cylinder body 11, and the other end of the lower adjusting spring 17 is respectively sleeved on the pressure adjusting bolt 16 at the lower part of the cylinder body 11. The pressure adjusting bolt 16 is rotated to compress the adjusting spring 17 and then push the pressurizing piston 20 to move. The upper pressure adjusting bolt 16 and the lower pressure adjusting bolt 16 of this embodiment are respectively installed horizontally on the upper and lower parts of the tail of the cylinder body 11 through threaded matching. The upper pressure adjusting bolt 16 is concentrically arranged with the upper adjusting spring 17 and the upper pressurizing piston 20 in turn, and the lower pressure adjusting bolt 16 is concentrically arranged with the lower adjusting spring 17 and the lower pressurizing piston 20 in turn. An O-type sealing ring III15 is sleeved on each pressure adjusting bolt 16, and each O-type sealing ring III15 Located between the pressure regulating bolt 16 and the cylinder body 11, a clamping hole 26 is set at the axial center inner hole of the cylinder body 11, and an elastic sleeve 12 is inserted into the clamping hole 26. The thin-walled workpiece 14 to be processed is placed in the elastic sleeve 12. An O-ring IV 13 is provided between the elastic sleeve 12 and the cylinder body 11. An oil groove combination is distributed on the surface of the elastic sleeve 12. The upper part of the pressurized chamber 25 is communicated with the oil groove combination of the elastic sleeve 12 through the upper oil path 32. The top of the cylinder body is provided with an oil filling port II 27, and the oil filling port II 27 is connected to the pressurized chamber 25. When the oil filling is completed, a plugging port II 33 is installed in the oil filling port II 27. The plugging port II 33 of this embodiment adopts an NPT1 / 8 type plugging port. The lower part of the pressurized chamber 25 is communicated with the oil groove combination of the elastic sleeve 12 through the lower oil path 34. The oil groove combination of the elastic sleeve 12 of this embodiment mainly includes a transverse groove 28, and the transverse groove 28 is distributed on the surface of the elastic sleeve 12.

[0025] Embodiment 2: Figure 4 In the embodiment, the oil groove combination of the elastic sleeve 12 mainly includes a transverse groove 28, which is distributed on the surface of the elastic sleeve 12. Two longitudinal grooves 29 are symmetrically distributed in the transverse groove 28. The rest of the structure is the same as that of the first embodiment.

[0026] Embodiment 3, in Figure 5 In the embodiment, the oil groove combination of the elastic sleeve 12 mainly includes a transverse groove 28, and a plurality of strip-shaped guide protrusions 30 are evenly distributed laterally in the transverse groove 28. In the embodiment, ten strip-shaped guide protrusions 30 are evenly distributed laterally in the transverse groove 28, and a gap 36 is provided between every two guide protrusions 30. The rest of the structure is the same as that of the first embodiment.

[0027] The use process of the present invention is:

[0028] The power oil of the power source of the pressure chuck enters from the oil pipeline 23 of the connecting plate 1, and provides a driving force F1 to the pressure-taking piston 10, pushing the pressure-taking piston 10 to move toward the side of the pressurizing piston 20. The upper pressurizing piston 20 and the lower pressurizing piston move synchronously under the push of the pressure-taking piston. The upper pressurizing piston 20 and the lower pressurizing piston can compress the hydraulic oil in the pressurizing chamber 25 to increase the pressure in the pressurizing chamber 25. After the pressure in the pressurizing chamber 25 increases, the hydraulic pressure is generated by squeezing the hydraulic oil in the upper oil circuit 32 and the lower oil circuit 34 to squeeze the surface of the elastic sleeve 12. After the elastic sleeve 12 is deformed under pressure, a clamping force is generated on the outer circle of the thin-walled workpiece 14. When the thin-walled workpiece needs to be taken out, Stop inputting the power oil of the lathe hydraulic power chuck power source, after the pressure of the pressure chamber 24 disappears, turn the pressure adjusting bolt 16 to make the adjusting spring 17 retreat, change the compression force of the pressure adjusting spring 17, make the pressurizing piston 20 move, adjust the moving position of the pressurizing piston 20, change the pressure in the pressurizing chamber 25, and reduce the pressure in the pressurizing chamber 25. Since there is no pressure squeeze in the pressurizing chamber 25, the hydraulic pressure generated by the hydraulic oil in the upper oil circuit 32 and the lower oil circuit 34 is reduced, so that the squeezing force on the outer surface of the elastic sleeve 12 is reduced, the deformation of the elastic sleeve 12 disappears, and the clamping hole 26 no longer generates clamping force on the thin-walled workpiece 14, and the thin-walled workpiece 14 can be freely taken out axially. Different oil grooves 30 are preset on the outer circle of the clamping elastic sleeve 12, so that different elastic sleeves 12 are used according to the different shapes of the thin-walled workpiece 14, so as to match the clamping points of different workpieces. After the fixture device is installed, hydraulic oil is injected into the pressure chamber 24 and the pressurizing chamber 25 through the oil filling port Ⅰ31 and the oil filling port Ⅱ27 respectively. The two oil filling ports are used to pre-fill the hydraulic oil. After the oil filling is completed, the two oil filling ports are sealed with NPT1 / 8 screw plugs, and sealant is applied to the threads of the two oil filling ports to lock the seal to prevent oil leakage.

[0029] Without limitation to this, any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A fully hydraulic steering gear hydraulic clamping device, characterized in that It mainly comprises a hydraulic amplification device, a hydraulic clamping device and a shell. The shell mainly comprises a cylinder sleeve (4) and a cylinder body (11). The cylinder sleeve (4) and the cylinder body (11) are arranged concentrically. The hydraulic amplification device is provided with a connecting plate (1). One end surface of the connecting plate (1) is connected to the hydraulic power chuck of the lathe. The outer ring of the other end surface of the connecting plate (1) is fixedly connected to the cylinder sleeve (4) and the cylinder body (11) in turn through a connecting piece (21). A guide column (5) is horizontally connected to the center of the other end surface of the connecting plate (1). The guide column (5) is located at the axial center position inside the cylinder sleeve (4). A pressure-taking piston (10) is sleeved on the outside of the guide column (5). The inner hole of the pressure-taking piston (10) moves axially on the surface of the guide column (5). A pressure-taking chamber (24) is provided between the other side surface of the connecting plate (1) and one side of the pressure-taking piston (10). The power source oil outlet of the lathe hydraulic power chuck is connected to the pressure-taking chamber (24) through an oil pipeline (23) provided on the connecting plate (1). The pressure-taking chamber (24) and the pressure-taking piston (10) are both located inside the cylinder sleeve (4). The outer circle of the pressure-taking piston (10) moves linearly inside the cylinder sleeve (4). A pressurizing chamber (25) is provided inside the cylinder body (11), and pressurizing pistons (20) are horizontally provided at the upper and lower parts of the pressurizing chamber (25). The pressurizing pistons (20) perform reciprocating linear motion in the pressurizing chamber (25). One end of the upper pressurizing piston (20) and one end of the lower pressurizing piston (20) are connected to the other side of the pressure-taking piston (10). The other ends of the two pressurizing pistons (20) are provided with adjusting springs (17). One end of each adjusting spring (17) contacts the end surface of the other end of the corresponding pressurizing piston (20). The other ends of the upper adjusting springs (17) are respectively sleeved on the pressure adjusting bolts (16) at the upper part of the cylinder body (11). The lower adjusting springs (17) are respectively sleeved on the pressure adjusting bolts (16) at the upper part of the cylinder body (11). ) are respectively sleeved on the pressure regulating bolt (16) at the lower part of the cylinder body (11), and the pressure regulating bolt (16) is rotated to compress the regulating spring (17) and then push the pressurizing piston (20) to move. A clamping hole (26) is arranged at the axial center inner hole of the cylinder body (11), and an elastic sleeve (12) is inserted into the clamping hole (26). The thin-walled workpiece (14) to be processed is placed in the elastic sleeve (12), and an oil groove combination is distributed on the surface of the elastic sleeve (12). The upper part of the pressurizing chamber (25) is communicated with the oil groove combination of the elastic sleeve (12) through the upper oil path (32), and the lower part of the pressurizing chamber (25) is communicated with the oil groove combination of the elastic sleeve (12) through the lower oil path (34).

2. The hydraulic clamping device for a fully hydraulic steering gear according to claim 1 is characterized in that An X-shaped sealing ring (22) is provided between one end surface of the connecting plate (1) and the lathe hydraulic power chuck. The X-shaped sealing ring (22) is placed in a mounting hole between the connecting plate (1) and the lathe hydraulic power chuck. The center of the other end surface of the connecting plate (1) and the guide column (5) are connected by interference fit. An oil filling port I (31) is provided on the upper part of the connecting plate (1). The oil filling port I (31) is connected to an oil pipeline (23). After the oil filling is completed, a leak plug I (2) is placed in the oil filling port I (31).

3. The hydraulic clamping device for a fully hydraulic steering gear according to claim 1 is characterized in that A plurality of support rings I (9) are distributed on the guide column (5), each support ring I (9) is sleeved with an O-type sealing ring I (8), and the plurality of O-type sealing rings I (8) are located between the inner hole of the pressure-taking piston (10) and the surface of the guide column (5), and a sealing ring I (19) is sleeved on the rear of the guide column (5).

4. The hydraulic clamping device for a fully hydraulic steering gear according to claim 1 is characterized in that The outer ring of the pressure taking piston (10) is distributed with a plurality of support rings II (7), each support ring II (7) is sleeved with an O-type sealing ring II (6), and the plurality of O-type sealing rings II (6) are located between the outer circle of the pressure taking piston (10) and the inner wall of the cylinder sleeve (4).

5. The hydraulic clamping device for a fully hydraulic steering gear according to claim 1 is characterized in that The upper part of the other side of the pressure-taking piston (10) and one end of the corresponding upper pressure-adding piston (20) are connected by an interference fit, and the lower part of the other side of the pressure-taking piston (10) and one end of the corresponding lower pressure-adding piston (20) are connected by an interference fit.

6. The hydraulic clamping device for a fully hydraulic steering gear according to claim 5 is characterized in that The upper pressurizing piston (20) and the lower pressurizing piston (20) are covered with sealing rings I (18).

7. The hydraulic clamping device for a fully hydraulic steering gear according to claim 1 is characterized in that The upper pressure regulating bolt (16) and the lower pressure regulating bolt (16) are respectively installed horizontally on the upper and lower sides of the tail of the cylinder body (11) through threaded engagement. The upper pressure regulating bolt (16) is concentrically arranged with the upper regulating spring (17) and the upper pressurizing piston (20) in turn, and the lower pressure regulating bolt (16) is concentrically arranged with the lower regulating spring (17) and the lower pressurizing piston (20) in turn. An O-type sealing ring III (15) is sleeved on each pressure regulating bolt (16), and each O-type sealing ring III (15) is located between the pressure regulating bolt (16) and the cylinder body (11).

8. The hydraulic clamping device for a fully hydraulic steering gear according to claim 1 is characterized in that The oil groove combination of the elastic sleeve (12) mainly includes a transverse groove (28), which is distributed on the surface of the elastic sleeve (12), or the oil groove combination of the elastic sleeve (12) mainly includes a transverse groove (28), which is distributed on the surface of the elastic sleeve (12), and two longitudinal grooves (29) are symmetrically distributed in the transverse groove (28), or the oil groove combination of the elastic sleeve (12) mainly includes a transverse groove (28), and a plurality of strip-shaped guide protrusions (30) are uniformly distributed in the transverse direction in the transverse groove (28), and a gap (36) is provided between every two guide protrusions (30).

9. The hydraulic clamping device for a fully hydraulic steering gear according to claim 1 is characterized in that The top of the cylinder body (11) is provided with an oil filling port II (27), which is communicated with the pressurizing chamber (25). After the oil filling is completed, a leak plugging device II (33) is installed in the oil filling port II (27).

10. The hydraulic clamping device for a fully hydraulic steering gear according to claim 1, characterized in that An O-type sealing ring IV (13) is provided between the elastic sleeve (12) and the cylinder body (11).

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