A cylinder with adjustable volume

Abstract

The present application relates to a cylinder with adjustable volume, and relates to the technical field of induction welding, which includes a vertical plate and a table top, the vertical plate is fixedly connected to one side of the table top, a workpiece placement mechanism is arranged on the table top, a pressing mechanism is arranged on the vertical plate, and pressure is applied to the workpiece placement mechanism, and the pressing mechanism includes a main cylinder, and an adjusting cylinder capable of axial movement with the main cylinder is arranged on the main cylinder, and the inner cavity of the main cylinder and the inner cavity of the adjusting cylinder are combined to form a pressing working chamber, and the adjusting cylinder controls the spatial size of the pressing working chamber by axial movement; a position adjustment mechanism is used to calibrate the main cylinder so that the main cylinder is vertically located directly above the workpiece placement mechanism. The present application can change the spatial size of the pressing working chamber so that the main cylinder and the adjusting cylinder are combined to form cylinders of different specifications to meet the pressing needs of various workpieces, and can effectively reduce the same type of pressing mechanisms and reduce the equipment investment cost.

Description

Technical Field

[0001] The present application relates to the technical field of cylinder structures, and in particular to a cylinder with adjustable volume. Background Art

[0002] In the related art, the stroke of the cylinder can be fine-tuned by adjusting the upper or lower nut of the piston, and the pressure applied by the cylinder can be changed by changing the piston stroke. However, in this solution, the cylinder body size is fixed, and the external pressure after the nut is fine-tuned decreases with the distance of the nut fine-tuning. If the applied or abutted pressure exceeds the maximum value of the cylinder, the cylinder needs to be disassembled and replaced or other workbenches need to be used for work, resulting in increased equipment costs. Summary of the invention

[0003] In order to reduce equipment costs, the present application provides a cylinder with adjustable volume.

[0004] The present application provides an adjustable volume cylinder adopting the following technical solution:

[0005] A cylinder with adjustable volume comprises a vertical plate and a table top, wherein the vertical plate is fixedly connected to one side of the table top, a workpiece placing mechanism is arranged on the table top, and a

[0006] A pressing mechanism applies pressure to the workpiece placement mechanism, the pressing mechanism includes a main cylinder, an adjusting cylinder capable of axially moving with the main cylinder is provided on the main cylinder, the inner cavity of the main cylinder and the inner cavity of the adjusting cylinder are combined to form a pressing working chamber, and the adjusting cylinder controls the space size of the pressing working chamber by axially moving;

[0007] The position adjustment mechanism is used to calibrate the main cylinder so that the main cylinder is vertically located directly above the workpiece placement mechanism.

[0008] By adopting the above technical solution, the axial movement of the adjusting cylinder on the main cylinder is used to adjust the space size of the pressing working chamber. When the space of the pressing working chamber is increased, more gas can be filled inside, so that the pressure applied by the pressing mechanism to the workpiece placement mechanism increases. Similarly, when the space of the pressing working chamber is reduced, the output pressure becomes smaller. By changing the space size of the pressing working chamber, the main cylinder and the adjusting cylinder are combined to form cylinders of different specifications to meet the pressing requirements of various workpieces, which can effectively reduce the same type of pressing mechanisms and reduce the equipment investment cost.

[0009] Optionally, a first piston block is slidably connected in the adjusting cylinder, and the first piston block separates the upper and lower parts of the pressing working chamber into an upper adjusting zone and a lower adjusting zone. The adjusting cylinder is provided with an upper adjusting valve connected to the upper adjusting zone, and the upper adjusting valve is used to adjust the air pressure in the upper adjusting zone. The main cylinder is provided with a lower adjusting valve connected to the lower adjusting zone, and the lower adjusting valve is used to adjust the air pressure in the lower adjusting zone.

[0010] By adopting the above technical solution, the air pressure of the first piston block is adjusted up and down twice by the upper regulating valve and the lower regulating valve, thereby driving the first piston block to slide up and down in the main cylinder or the regulating cylinder.

[0011] Optionally, the inner wall of the main cylinder is provided with an internal thread, the outer wall of the adjusting cylinder is provided with an external thread, and the main cylinder and the adjusting cylinder are threadedly connected; the main cylinder is provided with a second piston block which fits with its inner wall, the second piston block is provided with a vent, and the first piston block is provided with a hole-blocking member. When the air pressure in the upper adjusting zone is greater than the air pressure in the lower adjusting zone, the first piston block slides along the inner wall of the adjusting cylinder toward the second piston block until the hole-blocking member extends into the vent, and the first piston block pushes the second piston block to slide along the inner wall of the main cylinder; when the air pressure in the upper adjusting zone is less than the air pressure in the lower adjusting zone, the second piston block drives the first piston block to slide along the inner wall of the main cylinder toward the adjusting cylinder until the second piston block conflicts with the adjusting cylinder, and the first piston block slides along the inner wall of the adjusting cylinder away from the second piston block.

[0012] By adopting the above technical solution, the pressing mechanism can isolate the upper adjustment area from the lower adjustment area as much as possible through the dynamic cooperation between the first piston block and the second piston block during operation, so as to realize the pressing and adjusting work of the pressing mechanism.

[0013] Optionally, a sealing groove is provided on the adjusting cylinder, a sealing ring is sleeved in the sealing groove, and the sealing ring is tightly fitted to the inner wall of the main cylinder.

[0014] By adopting the above technical solution, it is possible to effectively avoid air leakage at the connection between the main cylinder and the adjusting cylinder, which would cause the pressing mechanism to fail to work properly.

[0015] Optionally, the position adjustment mechanism includes a sliding frame arranged on the vertical plate, the sliding frame is provided with a longitudinal adjustment plate that slides toward or away from the vertical plate, a plurality of connecting plates are fixedly connected to the longitudinal adjustment plate, and the plurality of connecting plates are fixedly connected to the main cylinder.

[0016] By adopting the above technical solution, the main cylinder is adjusted to be away from or close to the vertical plate through the longitudinal adjustment plate.

[0017] Optionally, a partition is provided on the sliding frame, and a longitudinal adjustment rod is threadedly connected to the partition, and the longitudinal adjustment rod passes through the partition and is fixedly connected to the longitudinal adjustment plate.

[0018] By adopting the above technical solution, the position of the longitudinal adjustment plate is adjusted by rotating the longitudinal adjustment rod.

[0019] Optionally, a plurality of transverse slide grooves are opened on the vertical plate, and the plurality of transverse slide grooves are arranged along the length direction of the main cylinder. A group of position adjustment mechanisms are correspondingly arranged in the transverse slide grooves, and the plurality of sliding frames slide along the opening direction of the transverse slide grooves.

[0020] By adopting the above technical solution, the verticality of the main cylinder can be adjusted through the cooperation of several sliding frames, and the sliding frames can slide in the horizontal sliding grooves to further adjust the horizontal position of the main cylinder.

[0021] Optionally, several transverse adjustment plates are provided on the main cylinder, and the several transverse adjustment plates are all arranged between two adjacent connecting plates. Transverse adjustment rods are threadedly connected to the connecting plates on both sides of the several transverse adjustment plates, and the transverse adjustment rods on both sides are respectively abutted against the two sides of the transverse adjustment plates, and the several transverse adjustment rods move closer to or away from the transverse adjustment plates.

[0022] By adopting the above technical solution, through the cooperation of the lateral adjustment rod and the lateral adjustment plate, the lateral position of the main cylinder relative to the heating table can be further accurately adjusted to avoid inaccurate direction of the piston rod applying pressure to the workpiece placement mechanism.

[0023] Optionally, a plurality of transverse adjustment plates are internally threadedly connected with cylinder adjustment rods, and the plurality of transverse adjustment plates are sleeved on the cylinder adjustment rods, and the cylinder adjustment rods are vertically parallel to the main cylinder.

[0024] By adopting the above technical solution, the stability of the main cylinder is further increased through the cylinder adjusting rod.

[0025] Optionally, a level bubble is provided on the cylinder adjusting rod.

[0026] By adopting the above technical solution, whether the cylinder adjusting rod is horizontal and vertical can be judged by the level bubble.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. By changing the size of the pressing working chamber, the main cylinder and the adjusting cylinder are combined to form cylinders of different specifications to meet the pressing requirements of various workpieces, which can effectively reduce the same type of pressing mechanisms and reduce equipment investment costs;

[0029] 2. The workpiece on the workpiece placement mechanism can be accurately pressed, which can effectively improve the accuracy of pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of this application;

[0031] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A;

[0032] Figure 3 It is a schematic diagram of the overall structure of the present application, mainly showing the longitudinal adjustment plate;

[0033] Figure 4 yes Figure 3A partial enlarged schematic diagram of part B;

[0034] Figure 5 It is a schematic diagram of the cross-sectional structure of the pressing mechanism of the present application, which mainly reflects the internal structure of the adjusting cylinder and the main cylinder;

[0035] Figure 6 superior Figure 1 A partial enlarged schematic diagram of part C in the middle.

[0036] Description of the drawings: 1. table; 2. vertical plate; 201. horizontal slide; 3. workpiece placement mechanism; 301. fixed table; 302. fixed rod; 303. power connection; 304. heating table; 305. induction coil; 4. pressing mechanism; 5. position adjustment mechanism; 6. sliding frame; 601. longitudinal slide; 602. longitudinal adjustment groove; 7. longitudinal adjustment plate; 8. longitudinal adjustment rod; 9. connecting plate; 10. clamp; 11. locking piece; 12. main cylinder; 1201. fixed groove; 1202. internal thread; 13. adjustment cylinder; 1301. internal thread; 1302. gear ring; 14 , cylinder adjusting rod; 1401, gear; 1402, adjusting thread; 15, sealing ring; 16, lateral adjusting plate; 17, lateral adjusting rod; 18, spirit level; 19, pressing working chamber; 1901, upper adjusting area; 1902, lower adjusting area; 20, upper adjusting valve; 21, lower adjusting valve; 22, first piston block; 2201, positioning ring; 23, plugging member; 24, limiting groove; 25, second piston block; 2501, vent hole; 2502, positioning groove; 26, piston rod; 2601, calibration groove; 27, infrared calibration structure; 28, partition; 29, scale ring. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1 -Attached Figure 6 , further details of this application are given.

[0038] A cylinder with adjustable volume, reference Figure 1 , Figure 2 , including a vertical plate 2 and a table 1, the vertical plate 2 is fixedly connected to the table 1, a workpiece placement mechanism 3 is fixedly connected to the table 1, and a pressing mechanism 4 and a position adjustment mechanism 5 that cooperate with the workpiece placement mechanism 3 are arranged on the vertical plate 2. The pressing mechanism 4 is used to apply pressure to the workpiece placement mechanism 3, and the position adjustment mechanism 5 is used to calibrate the main cylinder 12 so that the main cylinder 12 is located directly above the workpiece placement mechanism 3.

[0039] The position adjustment mechanism 5 includes two adjustment components slidably connected to the vertical plate 2. Two transverse slide grooves 201 are provided on one side of the vertical plate 2 close to the workpiece placement mechanism 3. The adjustment components include a sliding frame 6 with one end sliding horizontally in the transverse slide groove 201. The two adjustment components are arranged along the height direction of the vertical plate 2.

[0040] The sliding frame 6 is provided with a longitudinal sliding groove 601 , in which a longitudinal adjustment plate 7 is slidably connected. The longitudinal adjustment plate 7 slides along the length direction of the sliding frame 6 .

[0041] refer to Figure 2 , Figure 3 , Figure 4 The sliding frame 6 is also provided with a longitudinal adjustment groove 602, and the longitudinal slide groove 601 and the longitudinal adjustment groove 602 are separated from each other by a partition 28. A longitudinal adjustment rod 8 is rotatably connected to the end of the longitudinal adjustment plate 7 facing the longitudinal adjustment groove 602, and the longitudinal adjustment rod 8 penetrates the partition 28 and is threadedly connected to the partition 28. The end of the longitudinal adjustment rod 8 away from the longitudinal adjustment plate 7 extends into the longitudinal adjustment groove 602. An adjustment knob is fixedly connected to the end of the longitudinal adjustment rod 8 in the longitudinal adjustment groove 602, and the longitudinal adjustment plate 7 can be controlled to slide back and forth in the longitudinal slide groove 601 by rotating the adjustment knob.

[0042] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 The pressing mechanism 4 includes a main cylinder 12, and the main cylinder 12 has two fixing grooves 1201 along the length extension direction. The end of the longitudinal adjustment plate 7 away from the vertical plate 2 is fixedly connected to two connecting plates 9, and the ends of the two connecting plates 9 vertically penetrate the sliding frame 6 and extend in the direction away from the longitudinal adjustment plate 7. A clamp 10 is fixedly connected to the end of the two connecting plates 9 away from the longitudinal adjustment plate 7. The two clamps 10 are correspondingly arranged in the fixing grooves 1201 and fix the main cylinder 12. Among them, a locking piece 11 for adjusting the length of the clamp 10 is provided on the clamp 10, and the length of the clamp 10 can be adjusted by the locking piece 11 to adapt to main cylinders 12 of different specifications.

[0043] Two transverse adjustment plates 16 are fixedly connected to one side of the main cylinder 12 near the longitudinal adjustment plate 7, and the two transverse adjustment plates 16 extend respectively between the two connecting plates 9 provided in the corresponding adjustment assembly. Transverse adjustment rods 17 are passed through and threadedly connected to the two connecting plates 9, and the two transverse adjustment rods 17 abut against the two sides of the transverse adjustment plates 16 respectively.

[0044] refer to Figure 5 The pressing mechanism 4 also includes an adjusting cylinder 13 , an inner wall of the main cylinder 12 is provided with an internal thread 1202 , an outer wall of the adjusting cylinder 13 is provided with an external thread 1301 , and the adjusting cylinder 13 is threadedly connected to the main cylinder 12 .

[0045] refer to Figure 1 , Figure 5A sealing groove is provided on one end of the adjusting cylinder 13 away from the workpiece placement mechanism 3, and a sealing ring 15 is sleeved in the sealing groove, and the sealing ring 15 is tightly fitted with the inner wall of the main cylinder 12. Among them, the displacement length of the sealing ring 15 to the workpiece placement mechanism 3 is greater than or equal to twice the maximum displacement length of the adjusting cylinder 13 that can move in the main cylinder 12 along the length extension direction of the main cylinder 12, so as to avoid excessive displacement of the adjusting cylinder 13 so that the external thread 1301 abuts against the sealing ring 15, resulting in sealing failure and air inflow to the main cylinder 12.

[0046] refer to Figure 3 , Figure 4 A toothed ring 1302 is provided on the outer side wall of the end of the adjusting cylinder 13 away from the main cylinder 12, and the two lateral adjusting plates 16 are penetrated and rotatably connected with the cylinder adjusting rod 14. The end of the cylinder adjusting rod 14 away from the table 1 is fixedly connected with a gear 1401 meshing with the toothed ring 1302. The cylinder adjusting rod 14 is provided with an adjusting thread 1402, and the cylinder adjusting rod 14 is threadedly connected with the lateral adjusting plate 16.

[0047] After the cylinder adjusting rod 14 rotates, the gear 1401 on the cylinder adjusting rod 14 pushes the gear ring 1302 on the adjusting cylinder 13 to rotate, and the adjusting cylinder 13 is driven to rotate synchronously through the gear ring 1302. The diameter of the gear 1401 is smaller than the diameter of the adjusting cylinder 13. When the gear 1401 rotates synchronously with the adjusting cylinder 13, the speed of the gear 1401 is greater than the speed of the adjusting cylinder 13, so that the gear 1401 can accurately control the rotation angle of the adjusting cylinder 13. The upper end surface of the gear 1401 is fixedly connected to a scale ring 29 for observing its own rotation angle.

[0048] After the gear 1401 controls the adjusting cylinder 13 to rotate synchronously, the adjusting cylinder 13 moves along the length extension direction of the main cylinder 12 toward the direction close to the table 1 or away from the table 1. At the same time, the cylinder adjusting rod 14 moves synchronously with the adjusting cylinder 13 on the lateral adjustment plate 16 toward the direction close to the table 1 or away from the table 1, so that the gear 1401 and the gear ring 1302 always remain in meshing.

[0049] In addition, a level bubble 18 is fixedly connected to the upper end surface of the gear 1401. The level bubble 18 is filled with liquid, and the offset position of the bubble is used to determine whether the cylinder adjustment rod 14 is offset.

[0050] refer to Figure 5 The inner cavity of the main cylinder 12 cooperates with the inner cavity of the adjusting cylinder 13 to form a pressing working chamber 19. The inner wall of the adjusting cylinder 13 is slidably connected with a first piston block 22. The first piston block 22 fits tightly to the inner wall of the adjusting cylinder 13 and divides the pressing working chamber 19 into an upper adjusting area 1901 and a lower adjusting area 1902.

[0051] The upper end surface of the adjusting cylinder 13 is fixedly connected with an upper adjusting valve 20, and the upper adjusting valve 20 is connected with the upper adjusting area 1901. In addition, the lower end surface of the main cylinder 12 is fixedly connected with a lower adjusting valve 21, and the lower adjusting valve 21 is connected with the lower adjusting area 1902.

[0052] A hole blocking member 23 is axially fixedly connected to one side of the first piston block 22 close to the main cylinder 12 , and a positioning ring 2201 is fixedly connected to the edge of one side of the first piston block 22 close to the main cylinder 12 , and the positioning ring 2201 cooperates with the hole blocking member 23 to form a limiting groove 24 .

[0053] The inner wall of the main cylinder 12 is slidably connected with a second piston block 25, and a vent hole 2501 is provided in the center of the second piston block 25 for the plugging member 23 to extend into and penetrate, so that the plugging member 23 and the inner bottom wall of the main cylinder 12 are squeezed against each other to achieve a buffering effect. A positioning groove 2502 is provided on the side of the second piston block 25 close to the adjustment cylinder 13 for the positioning ring 2201 to extend into. When the first piston block 22 moves into the main cylinder 12, the plugging member 23 extends into the vent hole 2501, which can prevent the gas in the upper adjustment area 1901 from entering the lower adjustment area 1902 as much as possible.

[0054] refer to Figure 1 , Figure 5 A piston rod 26 is axially arranged on the first piston block 22, and the piston rod 26 is fixedly connected to the first piston block 22 and the hole blocking member 23. The piston rod 26 penetrates and extends toward the side of the adjustment cylinder 13 away from the table top 1 and the side of the main cylinder 12 close to the table top 1.

[0055] refer to Figure 1 , Figure 6 The workpiece placement mechanism 3 includes a fixed table 301 fixedly connected to the table top 1, a fixed rod 302 is fixedly connected to the fixed table 301, an end of the fixed rod 302 away from the table top 1 is fixedly connected to a power connection part 303, a heating table 304 is axially fixedly connected inside the power connection part 303, an induction heating coil is axially wound on the heating table 304, and the cross-section of the power connection part 303 coincides with that of the induction coil 305.

[0056] A calibration groove 2601 is axially opened in the piston rod 26, and an infrared calibration structure 27 is fixedly connected to the end of the piston rod 26 away from the table 1. The infrared calibration structure 27 emits infrared light into the calibration groove 2601 and makes the infrared light shine on the infrared calibration structure 27 along the calibration groove 2601 and shine on the middle of the heating table 304. If the infrared light is offset outward, it means that the piston rod 26 is not fully aligned.

[0057] The implementation principle of the embodiment of the present application is: the main cylinder 12 is moved to the top of the fixed platform 301 by the cooperation between the adjustment component and the horizontal slide groove 201.

[0058] Subsequently, by rotating the longitudinal adjustment rod 8 and the transverse adjustment rod 17, the center axis of the piston rod 26 is brought close to the center axis of the induction coil 305. During the adjustment process, the infrared calibration structure 27 and the level bubble 18 are used for calibration, so that the center axis of the piston rod 26 and the center axis of the induction coil 305 are in the same straight line.

[0059] When the staff needs to replace the pressed workpiece and adjust the pressure applied by the cylinder, the cylinder adjusting rod 14 can be rotated to push the gear ring 1302 to rotate through the gear 1401 on the cylinder adjusting rod 14, and further make the external thread 1301 on the adjusting cylinder 13 move along the internal thread 1202 on the main cylinder 12, so that the adjusting cylinder 13 moves away from or close to the table 1. The volume of the pressing working chamber 19 increases as the adjusting cylinder 13 moves away from the table 1, and decreases as the adjusting cylinder 13 approaches the table 1.

[0060] When the space of the piston block pressing working chamber 19 is increased, more gas can be filled inside, so that the pressure output by the piston rod 26 increases. Similarly, when the space of the pressing working chamber 19 is reduced, the pressure output by the piston rod 26 decreases. By changing the size of the pressing working chamber 19, the main cylinder 12 and the adjustment cylinder 13 are combined to form cylinders of different specifications to meet the pressing requirements of various workpieces, which can effectively reduce the same type of pressing mechanisms and reduce the equipment investment cost.

[0061] It should be noted that when the piston rod 26 is pressed downward, the upper regulating valve 20 inflates the upper regulating area 1901, and at the same time the lower regulating valve 21 opens to allow external air to communicate with the lower regulating area 1902 or to suck air out of the lower regulating area 1902 through an external machine.

[0062] The air in the upper adjustment area 1901 accumulates to push the first piston block 22 to slide toward the second piston block 25, and then the first piston block 22 and the second piston block 25 are combined and slide together on the inner wall of the main cylinder 12 toward the bottom of the main cylinder 12 until the second piston block 25 collides with the bottom of the main cylinder 12.

[0063] When the piston rod 26 contracts, the upper regulating valve 20 opens to allow the outside air to communicate with the upper regulating area 1901 or the air in the upper regulating area 1901 is sucked out by an external machine. At the same time, the lower regulating valve 21 inflates the lower regulating area 1902, so that the combination of the first piston block 22 and the second piston block 25 slides along the inner wall of the main cylinder 12 toward the bottom of the regulating cylinder 13.

[0064] During the sliding process, the second piston block 25 contacts the cylinder body of the adjusting cylinder 13 extending into the main cylinder 12 and stops sliding, causing the second piston block 25 to separate from the first piston block 22. Subsequently, the first piston block 22 enters the adjusting cylinder 13 and slides along the inner wall of the adjusting cylinder 13 until it returns to its initial position.

[0065] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cylinder with adjustable volume, comprising a vertical plate (2) and a table top (1), wherein the vertical plate (2) is fixedly connected to one side of the table top (1), and a workpiece placement mechanism (3) is provided on the table top (1), characterized in that: The vertical plate (2) is provided with A pressing mechanism (4) applies pressure to the workpiece placement mechanism (3), the pressing mechanism (4) comprising a main cylinder (12), the main cylinder (12) being provided with an adjusting cylinder (13) capable of axial movement therewith, the inner cavity of the main cylinder (12) and the inner cavity of the adjusting cylinder (13) being combined to form a pressing working chamber (19), the adjusting cylinder (13) controlling the spatial size of the pressing working chamber (19) by axial movement; A position adjustment mechanism (5) is used to calibrate the main cylinder (12) so that the main cylinder (12) is vertically located directly above the workpiece placement mechanism (3). The position adjustment mechanism (5) includes a sliding frame (6) arranged on the vertical plate (2). The sliding frame (6) is provided with a longitudinal adjustment plate (7) that slides toward or away from the vertical plate (2). The longitudinal adjustment plate (7) is fixedly connected with a plurality of connecting plates (9). The plurality of connecting plates (9) are fixedly connected to the main cylinder (12). The main cylinder (12) is provided with a plurality of transverse adjustment plates (16). The plurality of transverse adjustment plates (16) are all arranged between two adjacent connecting plates (9). The connecting plates (9) on both sides of the plurality of transverse adjustment plates (16) are threadedly connected with transverse adjustment rods (17). The transverse adjustment rods (17) on both sides are respectively abutted against the transverse adjustment plates (16). On both sides, a plurality of the lateral adjustment rods (17) move toward or away from the lateral adjustment plate (16); a plurality of the lateral adjustment plates (16) are internally threadedly connected with cylinder adjustment rods (14); a plurality of the lateral adjustment plates (16) are sleeved on the cylinder adjustment rods (14); the cylinder adjustment rods (14) are vertically parallel to the main cylinder (12); a toothed ring (1302) is provided on the outer side wall of the end of the adjustment cylinder (13) away from the main cylinder (12); the cylinder adjustment rod (14) passes through and is rotatably connected to the lateral adjustment plate (16); a gear (1401) meshing with the toothed ring (1302) is fixedly connected to the end of the cylinder adjustment rod (14) away from the table (1); an adjustment thread (1402) is provided on the cylinder adjustment rod (14); and the cylinder adjustment rod (14) is threadedly connected to the lateral adjustment plate (16).

2. The volume-adjustable cylinder according to claim 1, characterized in that: A first piston block (22) is slidably connected inside the regulating cylinder (13), and the first piston block (22) divides the pressing working chamber (19) into an upper regulating area (1901) and a lower regulating area (1902) at the upper and lower parts. An upper regulating valve (20) connected to the upper regulating area (1901) is provided on the regulating cylinder (13), and the upper regulating valve (20) is used to adjust the air pressure in the upper regulating area (1901). A lower regulating valve (21) connected to the lower regulating area (1902) is provided on the main cylinder (12), and the lower regulating valve (21) is used to adjust the air pressure in the lower regulating area (1902).

3. The volume-adjustable cylinder according to claim 2, characterized in that: The inner wall of the main cylinder (12) is provided with an internal thread (1202), and the outer wall of the adjusting cylinder (13) is provided with an external thread (1301), and the main cylinder (12) and the adjusting cylinder (13) are threadedly connected; the main cylinder (12) is provided with a second piston block (25) which is in contact with the inner wall thereof, and the second piston block (25) is provided with an air vent (2501), and the first piston block (22) is provided with a hole blocking member (23), and when the air pressure in the upper adjusting area (1901) is greater than the air pressure in the lower adjusting area (1902), the first piston block (22) moves along the inner wall of the adjusting cylinder (13) toward the second piston block (25). The piston block (25) slides until the hole blocking member (23) extends into the vent hole (2501), and the first piston block (22) pushes the second piston block (25) to slide along the inner wall of the main cylinder (12); when the air pressure in the upper adjustment zone (1901) is less than the air pressure in the lower adjustment zone (1902), the second piston block (25) drives the first piston block (22) to slide along the inner wall of the main cylinder (12) toward the adjustment cylinder (13) until the second piston block (25) contacts the adjustment cylinder (13), and the first piston block (22) slides along the inner wall of the adjustment cylinder (13) away from the second piston block (25).

4. The volume-adjustable cylinder according to claim 1, characterized in that: The regulating cylinder (13) is provided with a sealing groove, a sealing ring (15) is sleeved in the sealing groove, and the sealing ring (15) is tightly fitted with the inner wall of the main cylinder (12).

5. The volume-adjustable cylinder according to claim 1, characterized in that: A partition plate (28) is arranged on the sliding frame (6), and a longitudinal adjustment rod (8) is threadedly connected to the partition plate (28). The longitudinal adjustment rod (8) passes through the partition plate (28) and is fixedly connected to the longitudinal adjustment plate (7).

6. The volume-adjustable cylinder according to claim 1, characterized in that: A plurality of transverse sliding grooves (201) are provided on the vertical plate (2), and the plurality of transverse sliding grooves (201) are arranged along the length direction of the main cylinder (12). A group of position adjustment mechanisms (5) are correspondingly arranged in the transverse sliding grooves (201), and the plurality of sliding frames (6) slide along the direction in which the transverse sliding grooves (201) are opened.

7. The volume-adjustable cylinder according to claim 6, characterized in that: A level bubble (18) is arranged on the cylinder adjusting rod (14).

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