Single-wheel hydraulic clamp controlled by single cylinder to clamp four rollers on two sides

Abstract

The invention discloses a single-cylinder-controlled double-side four-roller clamping single-wheel hydraulic clamp, and relates to the technical field of mechanical production equipment.The single-cylinder-controlled double-side four-roller clamping single-wheel hydraulic clamp comprises a clamp assembly, the clamp assembly comprises a mounting base, a pair of symmetrically-mounted clamping plates are fixedly mounted at the bottom of the mounting base, and first sliding rails are fixedly mounted on the side faces of the clamping plates; clamping assemblies are slidably mounted at the two ends of the clamping plates through first sliding rails, heat insulation covers are fixedly mounted at the bottoms of the clamping plates, hydraulic telescopic rods for controlling the clamping assemblies to move are fixedly mounted between the two clamping plates, and a double-side synchronous displacement assembly is arranged between the two clamping assemblies; according to the invention, a whole stack of rough 1.3 t heavier wheels are singly placed on the single trolley of the quenching furnace, the production efficiency of heavy wheels is improved, the stability of a hydraulic manipulator for clamping workpieces is improved, the repeated positioning precision of the manipulator can reach + / -2mm, the clamp can bear the high temperature of 600 DEG C of the workpieces discharged from the slow cooling furnace, and the production efficiency of the heavy wheels is improved. And stable operation in a high-temperature severe environment is realized.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical production equipment, and in particular to a single-wheel hydraulic clamp for clamping four rollers on both sides controlled by a single cylinder. Background Art

[0002] At present, in the domestic heavy-duty wheel production process, it is necessary to transfer the forged wheels from the slow cooling furnace to the turntable, and then transfer the stacked wheels on the turntable to the quenching furnace individually. The temperature of the wheels is about 600℃. If manual or manual operation with auxiliary tools is used during the transfer, it will not only affect production inefficiency, but also may cause safety accidents. Therefore, the loading and unloading and handling operations of such wheels, as well as the operation of changing the wheel production station, can only be handled by automated equipment, such as heavy-duty manipulators.

[0003] However, the clamp part of the current manipulator cannot operate stably for a long time and is expensive. Not only is it not firm and stable enough when clamping the wheel, there is a risk of slipping, but it cannot operate stably under the high temperature emitted from the wheel, which is difficult to meet the actual needs of wheel production. Therefore, a hydraulic clamp is proposed to meet the actual needs of wheel production. Summary of the invention

[0004] The present invention discloses a single-wheel hydraulic clamp with four rollers on both sides controlled by a single cylinder. This type of manipulator can effectively solve the shortcomings of the background technology and realize the synchronous contraction of the clamping jaws in both directions using only a single cylinder, thereby reducing the manufacturing cost and improving the working efficiency of the wheel rolling line.

[0005] In order to solve the above technical problems, the present invention provides a single-wheel hydraulic clamp with a single-cylinder controlled double-sided four-roller clamping, including a clamp assembly and a lifting assembly for controlling the lifting of the clamp assembly, the clamp assembly includes a mounting seat, a pair of symmetrically installed clamping plates are fixedly installed at the bottom of the mounting seat, a first slide rail is fixedly installed on the side of the clamping plate, and the clamping assembly is slidably installed on both ends of the clamping plate through the first slide rail, a heat insulation cover is fixedly installed at the bottom of the clamping plate, a hydraulic telescopic rod for controlling the movement of the clamping assembly is fixedly installed between the two clamping plates, and a double-sided synchronous displacement assembly is arranged between the two clamping assemblies; the clamping assembly includes a clamping claw, and suspension rods are fixedly installed on both sides of the bottom of the clamping claw, the bottom edge of the suspension rod is raised and matches the wheel rim, and the bottom end of the suspension rod is fixedly sleeved with a roller-shaped claw head, and the suspension rod and An insulating sleeve is provided between the contact surfaces of the claw heads, and the insulating sleeve is provided to separate the boom from the high-temperature wheel to prevent the claw heads from transferring too much heat to the boom when they contact the high-temperature wheel, thereby causing deformation; the bilateral synchronous displacement assembly includes a bearing seat, and the bearing seat is fixedly installed between the two clamping plates, and a first bevel gear is rotatably installed at the bottom of the bearing seat, and a first rack is connected to the surface of the first bevel gear in meshing transmission, and there are two first racks, and a guide bar is fixedly installed at the bottom of the first rack, and one end of the guide bar is fixedly installed with the clamping claw; the output end of the hydraulic telescopic rod is movably connected to one of the clamping claws, and the clamping claw is driven to move by the hydraulic telescopic rod, and the two clamping claws can be controlled to move at the same time by cooperating with the bilateral synchronous displacement assembly, and the wheel rim can be clamped by the protruding edge of the claw head, thereby realizing the function of vertically grasping a single wheel.

[0006] In some embodiments, the projected area of ​​the heat insulation cover is not less than the projected area of ​​the clamp assembly to ensure that the bottom of the clamp assembly can be effectively shielded and protected during use, thereby improving the service life of the reinforcement assembly. The surface of the heat insulation cover is provided with a long groove for the passage of the suspension rod. A first mounting frame is fixedly installed on the top of the heat insulation cover, and the top of the first mounting frame is fixedly installed with a clamping plate. Second mounting frames are fixedly installed on both sides of the top of the heat insulation cover, and a third mounting frame is fixedly installed on the side of the second mounting frame, and the third mounting frame is fixedly installed between the two clamping plates.

[0007] In some embodiments, a buffer seat is provided on the top of the mounting seat, and the buffer seat includes a mounting cover covering the top of the mounting seat. A buffer assembly is provided on the top of the mounting seat to provide buffering when the clamp assembly collides with the wheel workpiece. A micro displacement sensor is fixedly installed on the top of the mounting seat to send a collision signal after a collision occurs, so that the lifting assembly brakes in time, and the displacement end of the micro displacement sensor is fixedly installed on the mounting cover.

[0008] In some embodiments, the buffer assembly includes a guide column, a spring and an energy absorbing seat, the top of the guide column is movably sleeved in the opening at the top of the mounting cover, the bottom of the guide column is fixedly mounted on the top of the spring, the spring is fixedly mounted on the top of the mounting seat, the top of the spring is movably sleeved with the energy absorbing seat, and the top of the energy absorbing seat is movably sleeved on the bottom of the mounting cover.

[0009] In some embodiments, the lifting assembly includes a lifting rod fixedly mounted on the top of the buffer seat, a second rack fixedly mounted on the side of the lifting rod, a moving frame movably mounted on the surface of the lifting rod, a reduction motor fixedly mounted on the side of the moving frame, and an output end of the reduction motor fixedly mounted with a second bevel gear meshing with the surface of the second rack, so as to control the lifting and lowering of the moving frame.

[0010] In some embodiments, a second slide rail is fixedly installed on both sides of the lifting rod, and the mobile frame includes a first mounting plate and a second mounting plate, and a first connecting plate and a second connecting plate are fixedly installed between the first mounting plate and the second mounting plate respectively, and a slider matching the second slide rail is fixedly installed on one side of the first connecting plate and the second connecting plate close to the lifting rod, and a protective cover is fixedly installed on the side of the second mounting plate, and the protective cover covers the side of the second bevel gear, further disclosing the structure of the mobile frame.

[0011] In some embodiments, a linear displacement sensor is fixedly mounted on the top of the second connecting plate, and an output end of the linear displacement sensor is fixedly mounted on a side of the lifting rod to facilitate controlling the position of the clamp assembly.

[0012] Compared with the related art, the single-wheel hydraulic clamp provided by the present invention with a single cylinder controlling the clamping of four rollers on both sides has the following beneficial effects:

[0013] The present invention provides a single-wheel hydraulic clamp which controls double-sided four-roller clamping with a single cylinder. A single hydraulic telescopic rod is used to realize bidirectional synchronous contraction of the clamping jaws, which reduces manufacturing costs while improving the working efficiency of the wheel rolling line. After using this type of manipulator clamp, it is possible to place a whole stack of rough-made wheels weighing up to 1.3 tons individually on a separate trolley in a quenching furnace, thereby improving the efficiency of heavy-duty wheel production and the stability of the hydraulic manipulator in clamping workpieces. The manipulator's repeated positioning accuracy can reach ±2mm, and the clamp can withstand a high temperature of 600°C for workpieces taken out of a slow cooling furnace, thereby realizing stable operation in harsh high-temperature environments and improving the working life of the clamp. The problems of the existing domestic manipulator clamps, such as the inability to operate stably for a long time, the high cost, the loose clamping, and the inability to operate stably at high temperatures, can be solved, and the requirements of complex and high-intensity working environments can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 The mobile frame structure of the present invention is schematically shown in FIG. Figure 1 ;

[0016] Figure 3 The mobile frame structure of the present invention is schematically shown in FIG. Figure 2 ;

[0017] Figure 4 It is a schematic diagram of the installation structure of the clamp assembly of the present invention;

[0018] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the clamp assembly of the present invention;

[0019] Figure 6 It is a cross-sectional view of the clamp assembly of the present invention.

[0020] Numbers in the figure: 1, clamp assembly; 2, lifting assembly; 11, mounting seat; 12, buffer seat; 13, clamping plate; 14, first slide rail; 15, clamping assembly; 16, heat shield; 17, hydraulic telescopic rod; 18, bilateral synchronous displacement assembly; 121, mounting cover; 122, buffer assembly; 123, micro displacement sensor; 151, clamping claw; 152, suspension rod; 153, claw head; 161, first mounting frame; 162, second mounting frame; 163, third mounting frame Mounting frame; 181, bearing seat; 182, first bevel gear; 183, first rack; 184, guide bar; 1221, guide column; 1222, spring; 1223, energy absorbing seat; 21, lifting rod; 23, second slide rail; 24, second rack; 25, reduction motor; 26, second bevel gear; 27, protective cover; 28, linear displacement sensor; 221, first mounting plate; 222, second mounting plate; 223, first connecting plate; 224, second connecting plate. DETAILED DESCRIPTION

[0021] Embodiment 1, by Figure 1-6The present invention comprises a clamp assembly 1 and a lifting assembly 2 for controlling the lifting of the clamp assembly 1. The clamp assembly 1 comprises a mounting seat 11. A pair of symmetrically mounted clamping plates 13 are fixedly mounted at the bottom of the mounting seat 11. A first slide rail 14 is fixedly mounted on the side of the clamping plate 13. Clamping assemblies 15 are slidably mounted on both ends of the clamping plate 13 through the first slide rail 14. A heat insulation cover 16 is fixedly mounted at the bottom of the clamping plate 13. A hydraulic telescopic rod 17 for controlling the movement of the clamping assembly 15 is fixedly mounted between the two clamping plates 13. A bilateral synchronous displacement assembly 18 is provided between the two clamping assemblies 15. The clamping assembly 15 comprises a clamping jaw 151. A suspension rod 152 is fixedly mounted on both sides of the bottom of the clamping jaw 151. The suspension rod 152 The bottom edge is raised and matches the wheel rim. The bottom end of the suspension rod 152 is fixedly sleeved with a roller-shaped claw head 153, and a heat insulation sleeve is provided between the contact surface of the suspension rod 152 and the claw head 153; the bilateral synchronous displacement assembly 18 includes a bearing seat 181, and the bearing seat 181 is fixedly installed between the two clamping plates 13. The bottom of the bearing seat 181 is rotatably installed with a first bevel gear 182, and the surface of the first bevel gear 182 is meshingly connected with a first rack 183. There are two first racks 183, and a guide bar 184 is fixedly installed at the bottom of the first rack 183, and one end of the guide bar 184 is fixedly installed with the clamping jaw 151; the output end of the hydraulic telescopic rod 17 is movably connected with one of the clamping jaws 151.

[0022] In this embodiment, after the output end of the hydraulic telescopic rod 17 drives one of the clamping jaws 151 to move, the clamping jaw 151 is fixed to the first rack 183 through the guide bar 184. At this time, the first rack 183 will also follow the movement of the clamping jaw 151. While moving, the clamping jaw 151 will mesh with the first bevel gear 182 to drive the first bevel gear 182 to rotate, and the other clamping jaw 151 also meshes with the center first bevel gear 182 in the same way. Therefore, driven by the first bevel gear 182, the clamping jaw 151 on the other side also moves synchronously, so that the suspension rods 152 on both sides are simultaneously retracted inward or the suspension rods 152 are loosened. Among them, the provided heat insulation sleeve separates the suspension rod 152 from the high-temperature wheel to prevent the claw head 153 from transferring too much heat to the suspension rod 152 when it contacts the high-temperature wheel, thereby causing deformation; the claw head 153 is in the shape of a roller. When the two jaws 151 and four claw heads 153 clamp a single wheel diagonally, the protruding edge of the claw head 153 can clamp the wheel rim to realize the function of vertically grasping a single wheel. Only a single hydraulic telescopic rod 17 is used to realize the two-way synchronous contraction of the jaws 151, which reduces the manufacturing cost while also improving the working efficiency of the wheel rolling line.

[0023] Embodiment 2, on the basis of embodiment 1, the projection area of ​​the heat insulation cover 16 is not less than the projection area of ​​the clamp assembly 1 to ensure that the bottom of the clamp assembly 1 can be effectively shielded and protected during use, and the surface of the heat insulation cover 16 is provided with a long groove for the suspension rod 152 to pass through, and a first mounting frame 161 is fixedly installed on the top of the heat insulation cover 16, and the top of the first mounting frame 161 is fixedly installed on the clamping plate 13, and second mounting frames 162 are fixedly installed on both sides of the top of the heat insulation cover 16, and third mounting frames 163 are fixedly installed on the sides of the second mounting frame 162, and the third mounting frame 163 is fixedly installed between the two clamping plates 13.

[0024] In this embodiment, the heat insulation cover 16 ensures the movable space of the suspension rod 152 by the long groove, and can effectively reduce the influence of the heat radiation of the high-temperature wheel on the clamp assembly 1, thereby improving the service life of the clamp assembly 1; the heat insulation cover 16 is made of stainless steel, and the bottom surface of the heat insulation cover 16 is provided with a heat insulation board, which can be made of fibrous insulation materials such as rock wool and glass wool. There are a large number of air pores inside these materials, and the thermal conductivity of air is very low (about 0.026W / (m·K)), which can effectively prevent heat conduction. The heat insulation coating; the bottom of the heat insulation board can be provided with a heat insulation coating, which can be a zirconium oxide ceramic coating. The melting point of zirconium oxide is as high as 2715°C, and its performance is stable in a high temperature environment of 600°C. Its thermal conductivity is low, about 2-3W / (m·K), and it has a high infrared reflectivity, which can effectively reflect thermal radiation; in addition, an aluminum oxide ceramic coating can also be used, which has a melting point of 2054°C, a thermal conductivity of about 30W / (m·K), and good chemical stability and wear resistance.

[0025] Embodiment 3, on the basis of embodiment 1, a buffer seat 12 is provided on the top of the mounting seat 11, the buffer seat 12 includes a mounting cover 121 covering the top of the mounting seat 11, a buffer assembly 122 is provided on the top of the mounting seat 11, a micro displacement sensor 123 is fixedly installed on the top of the mounting seat 11, and the displacement end of the micro displacement sensor 123 is fixedly installed on the mounting cover 121.

[0026] In this embodiment, by installing the buffer component 122 and the micro displacement sensor 123, when the clamp component 1 collides with the wheel workpiece during its vertical drop, it can not only play a role in buffering and protecting the clamp component 1, but the micro displacement sensor 123 can also trigger the collision signal in time, allowing the lifting component 2 to brake in time to avoid damage to the clamp component 1.

[0027] Embodiment 4, on the basis of embodiment 3, the buffer assembly 122 includes a guide column 1221, a spring 1222 and an energy absorbing seat 1223, the top of the guide column 1221 is movably sleeved in the opening at the top of the mounting cover 121, the bottom of the guide column 1221 is fixedly mounted on the top of the spring 1222, the spring 1222 is fixedly mounted on the top of the mounting seat 11, the top of the spring 1222 is movably sleeved with the energy absorbing seat 1223, and the top of the energy absorbing seat 1223 is movably sleeved on the bottom of the mounting cover 121.

[0028] In this embodiment, there are four buffer components 122 , which are located at the four corners of the rectangle in the buffer seat 12 to ensure stability.

[0029] Embodiment 5, on the basis of embodiment 3, the lifting assembly 2 includes a lifting rod 21 fixedly mounted on the top of the buffer seat 12, a second rack 24 is fixedly mounted on the side of the lifting rod 21, a moving frame is movably mounted on the surface of the lifting rod 21, a reduction motor 25 is fixedly mounted on the side of the moving frame, and the output end of the reduction motor 25 is fixedly sleeved with a second bevel gear 26 meshing with the surface of the second rack 24.

[0030] In this embodiment, the second bevel gear 26 is driven to rotate by the reduction motor 25 so as to mesh with the second rack 24, thereby controlling the lifting of the movable frame, and further controlling the lifting of the clamp assembly 1, thereby realizing the operation of lowering the clamp assembly 1 and lifting the wheel.

[0031] Embodiment 6, on the basis of embodiment 5, the second slide rails 23 are fixedly installed on both sides of the lifting rod 21, the moving frame includes a first mounting plate 221 and a second mounting plate 222, the first connecting plate 223 and the second connecting plate 224 are fixedly installed between the first mounting plate 221 and the second mounting plate 222, respectively, the first connecting plate 223 and the second connecting plate 224 are fixedly installed with a slider matching the second slide rail 23 on one side close to the lifting rod 21, the side of the second mounting plate 222 is fixedly installed with a protective cover 27, and the protective cover 27 covers the side of the second bevel gear 26. A linear displacement sensor 28 is fixedly installed on the top of the second connecting plate 224, and the output end of the linear displacement sensor 28 is fixedly installed on the side of the lifting rod 21.

[0032] In this embodiment, the mobile frame also moves laterally through the slide to achieve the displacement of the wheel, and the positioning accuracy of the mobile frame is increased by cooperating with the slider through the multiple second slide rails 23. Among them, the linear displacement sensor 28 is set to facilitate the control of the position of the clamp assembly 1.

[0033] This clamp has been installed on the 8# manipulator in the high-temperature quenching loading and unloading gantry truss handling project and put into actual production use, achieving the expected effect and meeting production needs.

[0034] Working principle: After the output end of the hydraulic telescopic rod 17 drives one of the clamping jaws 151 to move, the clamping jaw 151 is fixed to the first rack 183 through the guide bar 184. At this time, the first rack 183 will also follow the movement of the clamping jaw 151. While moving, the clamping jaw 151 will mesh with the first bevel gear 182 to drive the first bevel gear 182 to rotate, and the other clamping jaw 151 is also meshed with the first bevel gear 182 in the center in the same way. Therefore, driven by the first bevel gear 182, the clamping jaw 151 on the other side also moves synchronously, so that the suspension rods 152 on both sides are simultaneously contracted inward or the suspension rods 152 are loosened, wherein the provided heat insulation sleeve separates the suspension rod 152 from the high-temperature wheel to prevent the claw head 153 from transferring too much heat to the suspension rod 152 when it contacts the high-temperature wheel, thereby causing deformation; claw The head 153 is in the shape of a roller. When the two clamping jaws 151 and the four claws 153 clamp a single wheel in a diagonal direction, the protruding edge of the claw head 153 can clamp the wheel rim, thereby realizing the function of vertically grasping a single wheel. Moreover, only a single hydraulic telescopic rod 17 is used to realize the bidirectional synchronous contraction of the clamping jaws 151, which reduces the manufacturing cost and improves the working efficiency of the wheel rolling line. The heat insulation cover 16 can effectively reduce the impact of the heat radiation of the high-temperature wheel on the clamp assembly 1, thereby increasing the service life of the clamp assembly 1. The buffer seat 12 is arranged to not only play the role of buffering and protecting the clamp assembly 1 when the clamp assembly 1 collides with the wheel workpiece during its vertical fall, but the micro displacement sensor 123 can also trigger the collision signal in time, so that the lifting assembly 2 can brake in time to avoid damage to the clamp assembly 1.

Claims

1. A single-wheel hydraulic clamp with four rollers on both sides controlled by a single cylinder, comprising a clamp assembly (1) and a lifting assembly (2) for controlling the lifting of the clamp assembly (1), characterized in that: The clamp assembly (1) comprises a mounting seat (11), a pair of symmetrically mounted clamping plates (13) are fixedly mounted at the bottom of the mounting seat (11), a first slide rail (14) is fixedly mounted on the side of the clamping plate (13), clamping assemblies (15) are slidably mounted on both ends of the clamping plate (13) through the first slide rail (14), a heat insulation cover (16) is fixedly mounted at the bottom of the clamping plate (13), a hydraulic telescopic rod (17) for controlling the movement of the clamping assembly (15) is fixedly mounted between the two clamping plates (13), and a bilateral synchronous displacement assembly (18) is provided between the two clamping assemblies (15); The clamping assembly (15) comprises a clamping jaw (151), and suspension rods (152) are fixedly mounted on both sides of the bottom of the clamping jaw (151), the bottom edge of the suspension rod (152) is raised and matches the wheel rim, the bottom end of the suspension rod (152) is fixedly sleeved with a roller-shaped claw head (153), and a heat insulation sleeve is provided between the contact surface of the suspension rod (152) and the claw head (153); The bilateral synchronous displacement assembly (18) comprises a bearing seat (181), wherein the bearing seat (181) is fixedly mounted between two clamping plates (13), a first bevel gear (182) is rotatably mounted at the bottom of the bearing seat (181), a first rack (183) is meshingly connected to the surface of the first bevel gear (182), two first racks (183) are provided, a guide bar (184) is fixedly mounted at the bottom of the first rack (183), and one end of the guide bar (184) is fixedly mounted to the clamping jaw (151); The output end of the hydraulic telescopic rod (17) is movably connected to one of the clamping claws (151).

2. A single-wheel hydraulic clamp with four rollers on both sides controlled by a single cylinder according to claim 1, characterized in that: The projection area of ​​the heat insulation cover (16) is not less than the projection area of ​​the clamp assembly (1) to ensure that the bottom of the clamp assembly (1) can be effectively shielded and protected during use. The surface of the heat insulation cover (16) is provided with a long groove for the suspension rod (152) to pass through. A first mounting frame (161) is fixedly installed on the top of the heat insulation cover (16). The top of the first mounting frame (161) is fixedly installed with the clamping plate (13). Second mounting frames (162) are fixedly installed on both sides of the top of the heat insulation cover (16). A third mounting frame (163) is fixedly installed on the side of the second mounting frame (162). The third mounting frame (163) is fixedly installed between the two clamping plates (13).

3. The single-wheel hydraulic clamp with double-sided four-roller clamping controlled by a single cylinder according to claim 1 is characterized in that: A buffer seat (12) is provided on the top of the mounting seat (11), the buffer seat (12) comprising a mounting cover (121) covering the top of the mounting seat (11), a buffer assembly (122) is provided on the top of the mounting seat (11), a micro displacement sensor (123) is fixedly mounted on the top of the mounting seat (11), and a displacement end of the micro displacement sensor (123) is fixedly mounted on the mounting cover (121).

4. The single-wheel hydraulic clamp with double-sided four-roller clamping controlled by a single cylinder according to claim 3 is characterized in that: The buffer assembly (122) comprises a guide column (1221), a spring (1222) and an energy absorbing seat (1223); the top of the guide column (1221) is movably sleeved in an opening at the top of the mounting cover (121); the bottom of the guide column (1221) is fixedly mounted on the top of the spring (1222); the spring (1222) is fixedly mounted on the top of the mounting seat (11); the top of the spring (1222) is movably sleeved with the energy absorbing seat (1223); and the top of the energy absorbing seat (1223) is movably sleeved on the bottom of the mounting cover (121).

5. The single-wheel hydraulic clamp with double-sided four-roller clamping controlled by a single cylinder according to claim 3 is characterized in that: The lifting assembly (2) comprises a lifting rod (21) fixedly mounted on the top of the buffer seat (12), a second rack (24) fixedly mounted on the side of the lifting rod (21), a moving frame movably mounted on the surface of the lifting rod (21), a reduction motor (25) fixedly mounted on the side of the moving frame, and a second bevel gear (26) meshing with the surface of the second rack (24) fixedly mounted on the output end of the reduction motor (25).

6. The single-wheel hydraulic clamp with double-sided four-roller clamping controlled by a single cylinder according to claim 1 is characterized in that: The second slide rails (23) are fixedly mounted on both sides of the lifting rod (21); the moving frame comprises a first mounting plate (221) and a second mounting plate (222); a first connecting plate (223) and a second connecting plate (224) are fixedly mounted between the first mounting plate (221) and the second mounting plate (222); a sliding block matching the second slide rail (23) is fixedly mounted on one side of the first connecting plate (223) and the second connecting plate (224) close to the lifting rod (21); a protective cover (27) is fixedly mounted on the side of the second mounting plate (222); the protective cover (27) covers the side of the second bevel gear (26).

7. The single-wheel hydraulic clamp with double-sided four-roller clamping controlled by a single cylinder according to claim 1 is characterized in that: A linear displacement sensor (28) is fixedly mounted on the top of the second connecting plate (224), and an output end of the linear displacement sensor (28) is fixedly mounted on the side of the lifting rod (21).

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