High-precision rapid positioning hydraulic clamp and using method thereof

Abstract

The invention discloses a high-precision rapid positioning hydraulic clamp and a using method thereof, and belongs to the technical field of hydraulic clamps. The high-precision rapid positioning hydraulic clamp comprises a base, first sliding rails are arranged at the front end and the rear end of the interior of the base in a mirror image mode, and a second sliding rail is arranged on one side of the two first sliding rails. The hydraulic clamp solves the problems that according to an existing hydraulic clamp, the positions of three clamp bodies are fixed, the clamping position cannot be adjusted by adjusting the position of the hydraulic clamp, it is difficult to avoid the soft position of the surface of a clamped object, and accurate and rapid positioning clamping and fixing of the hydraulic clamp are affected. The clamping directions of the clamping strips are adjusted through sliding of the sliding rods in the first sliding rails, and missing clamping positions are taken out through sliding of the temporary fixing blocks stored in the second sliding rails and are not filled into the first sliding rails to clamp objects placed at the upper ends of the trays.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic clamps, in particular to a high-precision and fast-positioning hydraulic clamp and a use method thereof. Background Art

[0002] Hydraulic clamps are a type of tooling equipment that uses liquid pressure to generate clamping force. It clamps the workpiece firmly through the stable and adjustable pressure provided by the hydraulic system to ensure that the position of the workpiece remains stable during processing or testing. Hydraulic clamps have the advantages of large clamping force, easy operation, stable and reliable clamping, etc.

[0003] A Chinese patent with publication number CN217143207U discloses a high-precision hydraulic clamp, including a disc, one side of which is fixedly connected to the output end of a servo motor through a rotating shaft, and three arc grooves are opened on the top of the disc. The servo motor drives the disc to rotate in the ring body, and the three straight rods inside the disc drive the slide bar to slide inside the guide groove. The three clamp bodies are driven to move relative to the workpiece through three fixed blocks. The three clamp bodies realize precise positioning and clamping of the workpiece, and the operation is simple and convenient.

[0004] The hydraulic clamp of the above patent clamps the object by relative movement of three clamps, and the positions of the three clamp bodies are fixed. The clamping position cannot be adjusted by adjusting the position of the hydraulic clamp. It is difficult to avoid the softer part of the surface of the clamped object, which affects the accurate and rapid positioning of the hydraulic clamp. Summary of the invention

[0005] The purpose of the present invention is to provide a high-precision and fast-positioning hydraulic clamp and a method for using the same. The clamping direction of the clamping strip is adjusted by sliding a sliding rod in the first sliding rail, and the missing clamping position is taken out by sliding a temporary fixed block stored in the second sliding rail, without filling the first sliding rail to clamp the items placed on the upper end of the tray, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-precision and fast positioning hydraulic clamp, comprising a base, wherein first sliding rails are mirror-arranged at the front and rear ends inside the base, and a second sliding rail is arranged on one side of the two first sliding rails, and the upper ends of the first sliding rails, the second sliding rails and the base are all provided with clamping bars, and a fixed block is slidably arranged at the lower end of the outside of the clamping bar, and sliding rods are arranged at the lower ends of the fixed blocks corresponding to the upper ends of the first sliding rails and the second sliding rails, and the fixed block in the first sliding rail can slide along the first sliding rail to slide and adjust the telescopic position of the clamping bar.

[0007] Preferably, extension pieces are welded and extended at both ends of the sliding rod, a transmission column welded and fixed to the lower extension piece is provided on one side of the lower end of the sliding rod, a first threaded rod with a threaded fit is penetrated inside the transmission column, a first anti-slip piece welded and fixed to the first threaded rod is provided between the first threaded rod and the base, the first anti-slip piece can be pushed to contact the base by the first threaded rod rotating inside the transmission column, and the sliding rod is clamped by the contact base and the extension piece.

[0008] Preferably, brackets are arranged on the upper extension piece of the sliding rod toward the front and rear ends of the fixing block, the fixing block is rotatably connected to the brackets, and the fixing block can rotate in the brackets to adjust the direction of the clamping strip.

[0009] Preferably, a through hole is provided in the middle of the base, a tray is provided at the center of the through hole, and a first hydraulic telescopic rod is provided at the lower end of the tray, and the tray can be pushed and the horizontal height of the lifted items can be adjusted by extending and retracting the first hydraulic telescopic rod.

[0010] Preferably, a second gear is provided in the middle of the interior of the tray, and four extension bars are evenly distributed around the outside of the tray. The lower ends of the four extension bars are provided with first gears that are meshed and connected to the outside of the second gear. The output of the second gear can drive the first gear to rotate, and the rotation of the first gear can drive the extension bar at the upper end to rotate. The rotation of the extension bar can expand and adjust the expansion angle.

[0011] Preferably, a second hydraulic telescopic rod is laterally arranged inside the fixed block, and both ends of the second hydraulic telescopic rod are respectively welded and fixed to the clamping bar and the fixed block, and the clamping bar can be pushed by the extension and retraction of the second hydraulic telescopic rod so that the clamping bar is directed toward the object to be clamped, and the object to be clamped can be clamped by the extension and retraction of the second hydraulic telescopic rod.

[0012] Preferably, the upper fixing block of the base is located on both sides between the two first sliding rails, the upper fixing block of the base is fixedly connected to the base by bolts, the fixing block located between the two first sliding rails is directly fixed to the upper end of the base, and the fixing block at the upper end of the base clamps the object in advance while fixing it.

[0013] Preferably, the bracket and the fixed block are rotatably provided with a second anti-slip sheet, and the second anti-slip sheet is welded toward the bracket and provided with a second threaded rod that cooperates with the thread of the fixed block. The rotation of the second anti-slip sheet can drive the second threaded rod to rotate, and the second threaded rod can rotate in the fixed block so that the second anti-slip sheet can continuously fit the bracket, continuously fit the bracket and fix the rotation direction of the fixed block.

[0014] Preferably, a support sheet is provided at the lower end of the clamping strip, and the support sheet is L-shaped. The support sheet can rotate and unfold clockwise when driven by a motor, and the support sheet can rotate to contact the lower end of the object to be clamped.

[0015] A method for using a high-precision and fast-positioning hydraulic clamp comprises the following steps:

[0016] Step 1: Place the object to be clamped on the upper end of the tray, rotate the first gear to adjust the expansion size of the upper extension bar, and shrink the extension bar to the lower end of the object to be clamped;

[0017] Step 2: Start the second hydraulic telescopic rod inside the fixed block at the upper end of the base, and the second hydraulic telescopic rod pushes the clamping bar to clamp the two sides of the object at the upper end of the second gear;

[0018] Step 3: The redundant sliding rods are slid from the first sliding rail to the second sliding rail for storage, and the missing sliding rods are slid from the second sliding rail to the first sliding rail for replenishment;

[0019] Step 4: Rotate the first threaded rod inside the transmission column, and the first anti-slip sheet and the extension sheet are close to the base to fix the sliding rod and the upper clamping strip;

[0020] Step 5: The fixing block is rotated in the bracket with the second anti-slip sheet as the center to adjust the angle of one end of the clamping strip. The second threaded rod is continuously rotated so that the second anti-slip sheet fits the bracket to fix the fixing block;

[0021] Step 6: The fixed block at the upper end of the sliding rod extends corresponding to the second hydraulic telescopic rod, and the second hydraulic telescopic rod pushes the corresponding clamping strip to fit the object pre-clamped in step 2;

[0022] Step 7: The support plate rotates clockwise to the lower end of the object to be clamped;

[0023] Step 8: The first hydraulic telescopic rod is retracted so that the tray and the extension bar are stored in the base.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. When the present invention places items on the upper end of the clamping tray, different numbers of clamping strips are required for items of different shapes and clamping positions. The four fixed blocks reserved in the first sliding rail can be adjusted in position by sliding the sliding rod in the first sliding rail. After the position adjustment, the rotating fitting base of the first threaded rod can fix the fixed blocks, thereby improving the stability of the fixed blocks when subsequently fitting the items. The position of the fixed blocks contacting the items can be slidably adjusted, and the redundant fixed blocks in the first sliding rail can be slid into the second sliding rail for storage. The second sliding rail reserved for spare use in the second sliding rail can be slid from the second sliding rail to the first sliding rail for use when multiple clamping fixed points are needed, so as to quickly locate the items to be clamped, and improve the accuracy of clamping the items by flexibly adjusting the positions and numbers of the fixed blocks in the first sliding rail.

[0026] 2. The support sheet at the lower end of the clamping bar of the present invention can rotate and unfold clockwise when driven by a motor. When the clamping bar contacts the object to be clamped and the object needs to be lifted and suspended in the air for subsequent clamping, the support sheet can rotate to contact the lower end of the object to be clamped, lift the lower end of the object, and assist the clamping of the clamping bar. On the other hand, when the object is placed on the upper end of the tray for clamping, the extension bar rotates with the first gear as the center and adjusts the unfolding scale of the extension bar according to the caliber of different objects, so that a part of the lower end of the object to be clamped is exposed to prepare for lifting by the support sheet, thereby preventing the lower end of the object to be clamped from completely contacting the tray and failing to lift it. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall external structure of the present invention;

[0028] Figure 2 A cross-sectional view of the internal structure of the tray of the present invention;

[0029] Figure 3 It is a schematic diagram of the position relationship of the sliding rod of the present invention;

[0030] Figure 4 It is a cross-sectional view of the internal structure of the fixing block of the present invention;

[0031] Figure 5 A cross-sectional view of the internal structure of the second threaded rod of the present invention;

[0032] Figure 6 It is a schematic diagram of the position relationship of the first sliding rail of the present invention;

[0033] Figure 7 For the present invention Figure 3 A partial enlarged view of area A.

[0034] In the figure: 1. base; 2. first sliding rail; 3. second sliding rail; 4. fixing block; 5. tray; 6. extension bar; 7. first gear; 8. first hydraulic telescopic rod; 9. second gear; 10. sliding rod; 11. extension plate; 12. bracket; 13. transmission column; 14. first threaded rod; 15. first anti-skid sheet; 16. second anti-skid sheet; 17. supporting sheet; 18. second threaded rod; 19. second hydraulic telescopic rod; 20. clamping bar. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with specific embodiments.

[0036] Example 1

[0037] like Figure 1As shown, a high-precision and fast-positioning hydraulic clamp of this embodiment includes a base 1, and first sliding rails 2 are arranged in a mirror image at the front and rear ends of the base 1. The clamping bar 20 sliding on the upper end of the first sliding rail 2 can slide along the first sliding rail 2, and clamping is performed after adjusting the clamping position. A second sliding rail 3 is arranged on one side of the two first sliding rails 2, and the redundant clamping bars 20 sliding inside the first sliding rail 2 can slide to the second sliding rail 3 for storage;

[0038] The first sliding rail 2, the second sliding rail 3 and the upper end of the base 1 are all provided with a clamping bar 20, and the lower end of the outside of the clamping bar 20 is provided with a fixed block 4, and the clamping bar 20 is embedded in the fixed block 4 and is slidably connected with the inside of the fixed block 4. The clamping of the object can be completed by sliding the clamping bar 20 in the fixed block 4 and moving toward the object to be clamped. Figure 3 and Figure 4 As shown, a second hydraulic telescopic rod 19 is transversely arranged inside the fixed block 4, and both ends of the second hydraulic telescopic rod 19 are respectively welded and fixed to the clamping bar 20 and the fixed block 4. The clamping bar 20 can be moved transversely by the extension and retraction of the second hydraulic telescopic rod 19 to complete the clamping of the object;

[0039] In order to improve the clamping accuracy and speed, Figure 1 , 3 and Figure 4 As shown, the upper ends of the first sliding rail 2 and the second sliding rail 3 are provided with sliding rods 10 corresponding to the lower ends of the fixed blocks 4, and the upper and lower ends of the sliding rods 10 are extended with extension pieces 11, and the extension of the extension pieces 11 allows the sliding rods 10 to stably slide in the first sliding rail 2 and the second sliding rail 3 to adjust the position of the clamping strip 20;

[0040] The upper fixing blocks 4 of the base 1 are located on both sides between the two first sliding rails 2. The upper fixing blocks 4 of the base 1 are fixedly connected to the base 1 by bolts. Before the clamping bars 20 movable in the first sliding rails 2 clamp the objects, the clamping bars 20 corresponding to the upper fixing blocks 4 of the base 1 move relatively to achieve pre-clamping and temporarily fix the position of the objects to be clamped.

[0041] In addition, if Figure 4 and Figure 5As shown, a transmission column 13 is provided on one side of the lower end of the sliding rod 10, and the transmission column 13 is welded and fixed to the outer wall of the extension piece 11, a first threaded rod 14 is provided inside the transmission column 13, and the outer portion of the first threaded rod 14 cooperates with the internal thread of the transmission column 13, the first threaded rod 14 continuously rotates in the transmission column 13 and can move toward the sliding rod 10, a first anti-slip sheet 15 is provided between the first threaded rod 14 and the base 1, and the first anti-slip sheet 15 is welded and fixed to the first threaded rod 14, through the continuous rotation of the first threaded rod 14, the first anti-slip sheet 15 will fit the base 1, and while the first anti-slip sheet 15 fits the base 1, the extension of the extension piece 11 can be matched with the first anti-slip sheet 15 to clamp the base 1, and fix the position of the sliding rod 10 and the upper clamping strip 20;

[0042] In order to allow the clamping strip 20 at the upper end of the extension piece 11 to provide more contact angles with the object to be clamped, a pair of brackets 12 are horizontally arranged on the upper end extension piece 11 of the sliding rod 10 toward the corresponding fixed block 4, and the brackets 12 are located at the front and rear ends of the corresponding fixed block 4, the fixed block 4 is rotatably connected to the brackets 12, and the lower end of the bracket 12 is welded and fixed to the corresponding extension piece 11. The direction and angle of the clamping strip 20 can be adjusted by rotating the fixed block 4 between the two brackets 12 to adapt to different clamping requirements and the clamping angle when different clamping requirements are met;

[0043] In order to fix the fixed block 4 after the angle adjustment, Figure 4 and Figure 5 As shown, a second anti-slip sheet 16 is provided at one end of the position where the bracket 12 and the fixed block 4 are rotatably connected, and a second threaded rod 18 is provided on the second anti-slip sheet 16 toward the inside of the bracket 12, and the outer portion of the second threaded rod 18 is threadedly matched with the fixed block 4, and the second threaded rod 18 rotates in the fixed block 4 and can continuously move toward the fixed block 4. As the second threaded rod 18 rotates, the second anti-slip sheet 16 will fit the fixed block 4 to fix the inclination angle of the fixed block 4 in the bracket 12;

[0044] like Figure 7 As shown, a support sheet 17 is provided at the lower end of the clamping bar 20, and the support sheet 17 is L-shaped. A motor is provided at the front end of the support sheet 17, and the housing of the motor is fixed to the outer wall of the clamping bar 20 by bolts. The support sheet 17 will approach the object to be clamped as the clamping bar 20 is extended, and the output of the motor can make the support sheet 17 rotate clockwise and drag the lower end of the object to be clamped:

[0045] In order to lift the object to be clamped, it is also prevented that the lifting position affects the support sheet 17 from rotating to contact the lower end of the object to be clamped. Figure 1 and 2As shown, a through hole is provided in the middle of the base 1, a tray 5 is provided at the center of the through hole, and a first hydraulic telescopic rod 8 is provided at the lower end of the tray 5. The tray 5 can be pushed to adjust its horizontal height by extending and retracting the first hydraulic telescopic rod 8;

[0046] In addition, a second gear 9 is provided in the middle of the tray 5, and four extension bars 6 are evenly distributed around the outside of the tray 5. The lower ends of the four extension bars 6 are all provided with first gears 7, and the outside of the first gear 7 is meshed and connected with the outside of the second gear 9. The rotation of the second gear 9 can drive the first gear 7 to rotate, and the rotation of the first gear 7 can drive the extension bars 6 to rotate. The rotation of the extension bars 6 can adjust the expansion diameter of the extension bars 6 to adapt to the placement of objects of different sizes to be clamped;

[0047] The upper and lower ends of the first gear 7 and the second gear 9 are rotatably connected to the upper and lower ends of the inside of the tray 5, respectively, and the horizontal heights of the first gear 7 and the second gear 9 can be synchronously adjusted by pushing the tray 5;

[0048] Example 2

[0049] In order to prevent the second hydraulic telescopic rod 19 from over-extending and causing the clamping bar 20 to squeeze the object to be clamped and cause deformation, a pressure sensor is built into the end of the clamping bar 20 facing the pallet 5, and the pressure sensor is electrically connected to the second hydraulic telescopic rod 19. After the second hydraulic telescopic rod 19 pushes the clamping bar 20 and contacts the object to be clamped, pressure is generated when squeezing the object to be clamped. The pressure is detected by the pressure sensor. When the pressure value is greater than the set value, a stop extension signal is given to the second hydraulic telescopic rod 19.

[0050] A method for using a high-precision and fast-positioning hydraulic clamp comprises the following steps:

[0051] Step 1: Place the object to be clamped on the upper end of the tray 5, start the motor corresponding to the lower end of the second gear 9 according to the caliber of the object to be placed, and the output shaft of the motor drives the second gear 9 to rotate, and the rotation of the second gear 9 drives the first gear 7 to rotate. The rotation of the first gear 7 directly adjusts the expansion size of the upper extension bar 6, so that the extension bar 6 shrinks to the lower end of the object to be clamped, so as to prevent the expansion of the extension bar 6 from affecting the subsequent support sheet 17 to hold up the object;

[0052] Step 2: Start the second hydraulic telescopic rod 19 fixed on both sides between the two first sliding rails 2 and inside the fixing block 4 at the upper end of the base 1. The second hydraulic telescopic rod 19 pushes the corresponding clamping bar 20 to clamp both sides of the objects placed on the upper end of the second gear 9 for pre-clamping and fixing;

[0053] Step 3: According to the number of clamping positions for the object to be clamped, the sliding rods 10 in the first sliding rail 2 are adjusted, the redundant sliding rods 10 are slid from the first sliding rail 2 to the second sliding rail 3 for storage, and the missing sliding rods 10 are slid from the second sliding rail 3 to the first sliding rail 2 for supplementation;

[0054] Step 4: The rotation of the sliding rod 10 in the first sliding rail 2 corresponds to the clamping position of the upper clamping strip 20, and the first threaded rod 14 inside the rotating transmission column 13 is pushed by the first threaded rod 14 to contact the outer wall of the base 1. With the continuous squeezing of the first threaded rod 14, the first anti-slip sheet 15 and the extension sheet 11 are closely attached to the base 1 to fix the position of the sliding rod 10 and the upper clamping strip 20;

[0055] Step 5: The fixing block 4 is rotated in the bracket 12 with the second anti-slip sheet 16 as the center to adjust the angle of one end of the clamping strip 20 to adapt to the shapes of different objects to be clamped. The second anti-slip sheet 16 is twisted to drive the second threaded rod 18 to rotate in the fixing block 4. The continuous rotation of the second threaded rod 18 makes the second anti-slip sheet 16 fit the bracket 12 to fix the fixing block 4.

[0056] Step 6: The second hydraulic telescopic rod 19 corresponding to the interior of the fixed block 4 at the upper end of the sliding rod 10 is extended, and the second hydraulic telescopic rod 19 pushes the corresponding clamping strip 20 to fit the object pre-clamped in step 2;

[0057] Step 7: The support sheet 17 rotates clockwise after the output of the motor, and the support sheet 17 rotates clockwise to move to the lower end of the object to be clamped, and lifts the object from the lower end of the object to be clamped;

[0058] Step 8: The first hydraulic telescopic rod 8 contracts so that the tray 5 and the extension bar 6 are stored in the base 1, so that the clamped items are suspended in the air.

[0059] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0060] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A high-precision and fast positioning hydraulic clamp, comprising a base (1), characterized in that: The first sliding rails (2) are mirror-imaged at the front and rear ends of the base (1), and a second sliding rail (3) is arranged on one side of the two first sliding rails (2). The upper ends of the first sliding rails (2), the second sliding rails (3) and the base (1) are all provided with clamping bars (20), and the lower end of the outside of the clamping bar (20) is slidably provided with a fixed block (4), and the upper ends of the first sliding rails (2) and the second sliding rails (3) are each provided with a sliding rod (10) at the lower end of the fixed block (4) corresponding to the upper end.

2. A high-precision and fast positioning hydraulic clamp according to claim 1, characterized in that: The upper and lower ends of the sliding rod (10) are welded and extended with extension pieces (11); one side of the lower end of the sliding rod (10) is provided with a transmission column (13) welded and fixed to the lower end extension piece (11); a first threaded rod (14) threadedly matched is penetrated inside the transmission column (13); a first anti-slip piece (15) welded and fixed to the first threaded rod (14) is provided between the first threaded rod (14) and the base (1).

3. A high-precision and fast positioning hydraulic clamp according to claim 2, characterized in that: The upper extension piece (11) of the sliding rod (10) is provided with brackets (12) facing the front and rear ends of the fixed block (4), and the fixed block (4) is rotatably connected to the brackets (12).

4. A high-precision and fast positioning hydraulic clamp according to claim 1, characterized in that: A through hole is provided in the middle of the base (1), a tray (5) is provided at the center of the through hole, and a first hydraulic telescopic rod (8) is provided at the lower end of the tray (5).

5. A high-precision and fast-positioning hydraulic clamp according to claim 4, characterized in that: A second gear (9) is arranged in the middle of the interior of the tray (5), and four extension bars (6) are evenly distributed around the exterior of the tray (5), and the lower ends of the four extension bars (6) are each provided with a first gear (7) meshingly connected with the exterior of the second gear (9).

6. The high-precision and rapid positioning hydraulic clamp according to claim 1, characterized in that: A second hydraulic telescopic rod (19) is transversely arranged inside the fixed block (4), and two ends of the second hydraulic telescopic rod (19) are respectively welded and fixed to the clamping strip (20) and the fixed block (4).

7. The high-precision and fast-positioning hydraulic clamp according to claim 1, characterized in that: The upper fixing blocks (4) of the base (1) are located on both sides between the two first sliding rails (2), and the upper fixing blocks (4) of the base (1) are fixedly connected to the base (1) via bolts.

8. The high-precision and rapid positioning hydraulic clamp according to claim 3, characterized in that: The bracket (12) and the fixing block (4) are rotatably provided with a second anti-slip sheet (16), and the second anti-slip sheet (16) is welded toward the bracket (12) and provided with a second threaded rod (18) threadably matched with the fixing block (4).

9. The high-precision and rapid positioning hydraulic clamp according to claim 6, characterized in that: A support sheet (17) is provided at the lower end of the clamping strip (20), and the support sheet (17) is L-shaped.

10. A method for using a high-precision and fast-positioning hydraulic clamp, based on the high-precision and fast-positioning hydraulic clamp according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: Place the object to be clamped on the upper end of the tray (5), rotate the first gear (7) to adjust the expansion size of the upper extension bar (6), and shrink the extension bar (6) to the lower end of the object to be clamped; Step 2: Start the second hydraulic telescopic rod (19) inside the fixed block (4) at the upper end of the base (1), so that the second hydraulic telescopic rod (19) pushes the clamping bar (20) to clamp the two sides of the object at the upper end of the second gear (9); Step 3: The redundant sliding rods (10) are slid from the first sliding rail (2) to the second sliding rail (3) for storage, and the missing sliding rods (10) are slid from the second sliding rail (3) to the first sliding rail (2) for replenishment; Step 4: Rotate the first threaded rod (14) inside the transmission column (13), and the first anti-slip sheet (15) and the extension sheet (11) are closely attached to the base (1) to fix the position of the sliding rod (10) and the upper clamping strip (20); Step 5: The fixing block (4) is rotated in the bracket (12) with the second anti-slip sheet (16) as the center to adjust the angle of one end of the clamping strip (20); the second threaded rod (18) is continuously rotated so that the second anti-slip sheet (16) fits the bracket (12) to fix the fixing block (4); Step 6: The fixed block (4) at the upper end of the sliding rod (10) is extended corresponding to the second hydraulic telescopic rod (19), and the second hydraulic telescopic rod (19) pushes the corresponding clamping strip (20) to fit the article pre-clamped in step 2; Step 7: The support sheet (17) rotates clockwise to move to the lower end of the object to be clamped; Step 8: The first hydraulic telescopic rod (8) is retracted to retract the tray (5) and the extension bar (6) into the base (1).

Images