Oil cylinder with adjustable oil cylinder stroke and buffer stroke

Abstract

The present invention discloses an oil cylinder with adjustable oil cylinder stroke and buffer stroke, a slide slot hole is provided at one end of the piston block in the cylinder barrel, a sliding guide column is fixed in the hole and is slidably connected to the buffer sleeve, and the buffer stroke adjusting member drives the buffer sleeve to extend and retract through gear transmission to dynamically adjust the length of the buffer sleeve extending into the first buffer cavity of the front end cover, forming a gradient throttling buffer; the stroke adjusting block in the rear cylinder port is linked with the rear end cover, and the oil cylinder stroke adjusting member driven by the worm gear controls the displacement of the adjusting rod to change the effective stroke space of the cylinder barrel, and the two-way clutch selects the buffer or stroke adjustment mode through electromagnetic sub-control, and the operating block drives the clutch to switch the transmission path to realize online coordinated adjustment of the stroke and buffer. The present invention integrates a two-way adjustment function, does not require shutdown and disassembly, and solves the problems of cumbersome adjustment, poor buffer adaptability and high energy consumption of traditional oil cylinders through worm gear self-locking, electromagnetic clutch and modular design, and has the advantages of high adjustment accuracy, strong stability, energy saving and high efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of oil cylinder equipment, in particular to an oil cylinder with adjustable oil cylinder stroke and buffer stroke. Background Art

[0002] Hydraulic cylinders, as important actuators in industrial equipment, are widely used in engineering machinery, metallurgical equipment, lifting and transportation, and other fields. The stroke and cushioning functions of traditional hydraulic cylinders are typically achieved through fixed structures, such as a preset cushion sleeve or throttle valve to control the end deceleration of the piston. However, in actual applications, different working conditions have different requirements for the cylinder's stroke length and cushioning performance. In particular, in scenarios with frequent load or speed switching, cylinders with fixed parameters cannot meet dynamic adjustment requirements, resulting in reduced equipment efficiency or unstable cushioning effect.

[0003] In the existing technology, some improvement schemes attempt to adjust the stroke or cushioning through mechanical adjustment or additional devices. For example, replaceable cushioning sleeves or adjusting screws are used to change the throttle orifice area. However, such methods require stopping the machine and disassembling components, which is cumbersome and affects production efficiency. Other technologies propose adjusting the cushioning characteristics through external valve groups or electronic controls, but these systems are highly complex and significantly increase costs. As for stroke adjustment, most rely on external limit devices or mechanical structures to adjust the cylinder installation position, which not only takes up space but also has limited adjustment accuracy.

[0004] Furthermore, the buffer structure of traditional cylinders presents adaptability issues under variable stroke conditions. As the cylinder stroke changes, the fixed-length buffer sleeve can cause premature or delayed buffering, affecting the consistency of the buffering effect. For example, an insufficient buffer section can easily cause shock in long strokes, while an excessively long buffer section in short strokes can waste energy. Furthermore, existing buffer mechanisms often rely on a single throttling method, which can easily cause pressure fluctuations during high-speed piston movement, resulting in insufficient buffering stability. Summary of the Invention

[0005] In response to the above-mentioned deficiencies in the prior art, the present invention aims to provide an integrated hydraulic cylinder in which the cylinder stroke and buffer stroke can be independently adjusted in both directions. Through the bidirectional clutch control design, the buffer sleeve telescopic dynamic throttling mechanism and the stroke adjustment block linkage structure, online coordinated adjustment of the cylinder stroke and the buffer stroke is achieved. The cylinder can complete parameter adaptation without shutting down or disassembling, solving the problems of cumbersome adjustment, mismatch between buffer effect and stroke, and large energy loss in traditional solutions. At the same time, through the self-locking of the worm gear, precise control of the electromagnetic clutch and modular design, it ensures high adjustment accuracy, strong stability and applicability to multiple working conditions, significantly improving the operating efficiency and reliability of the equipment.

[0006] The cam is provided with an adjusting screw mandrel and a guide rail, and the guide rail is provided with an adjusting screw mandrel which is adapted to guide the piston rod of the cam and to adjust the piston rod of the cam.

[0007] The cam is provided with a second end which is fixed to the oil channel of the oil pump, and the cam is connected with the oil pumping unit on the second end of the oil pumping unit to adjust the oil flow.

[0008] In the above technical solution, the specific structure of the buffer sleeve is:

[0009] A sliding sleeve hole passes through the middle of the buffer sleeve, and a plurality of sliding grooves are provided on the inner wall of the sliding sleeve hole. A gear rack is fixedly connected to one side of the inner wall of the sliding groove, and the gear rack is transmission-connected to the buffer stroke adjustment member. A plurality of oil groove holes are provided on the edge of the port on one side of the buffer sleeve, and a plurality of guide groove holes are provided between adjacent oil groove holes. A plurality of oil guide holes connected to the oil groove holes are provided on the outer wall of the buffer sleeve.

[0010] In the above technical solution, a specific structure of the buffer stroke adjustment member is further provided:

[0011] The first gear is engaged with the first group of gears and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear

[0012] In the above technical solution, in order to improve the working stability of the first gear and the second bevel gear, U-shaped brackets are fixedly connected to the sliding guide columns on both sides of the first gear, and a runner groove is provided on the sliding guide column on one side of the U-shaped bracket. The second bevel gear is rotatably connected in the runner groove. The rotating shafts of the first gear and the second bevel gear are rotatably connected in the middle part of the U-shaped bracket. A guide groove is provided in the sliding groove, and the U-shaped bracket is slidably connected in the guide groove.

[0013] In the above technical solution, a specific structure of the cylinder stroke adjustment member is further provided:

[0014] The oil cylinder stroke adjustment member includes a worm wheel, a worm, a second gear, a connecting shaft, and a third gear. A sliding guide groove is provided on the adjusting rod located in the slot hole, and gear tooth grooves are respectively provided on the adjusting rods on both sides of the sliding guide groove. A worm wheel is rotatably connected in the rear end cover on one side of the slot hole, and the second gears are fixedly connected on both sides of the axis of the worm wheel. The second gears are respectively meshed with the gear tooth grooves. One side of the worm wheel is movably connected in the sliding guide groove, and the other side of the worm wheel is meshed with the worm. The worm is fixedly connected to one end of the connecting shaft, and the other end of the connecting shaft is fixedly connected to the third gear. The third gear is connected to the two-way clutch.

[0015] In the above technical solution, a specific structure of a two-way clutch is also provided:

[0016] The two-way clutch includes a sliding sleeve, a first clutch plate, a second clutch plate, a driving plate, a centering calibration piece, and a fourth gear. The operating block in the rear end cover is rotatably connected to the sliding sleeve, the sliding sleeve is fixedly connected to the fourth gear, the fourth gear and the third gear are meshed with each other, one side of the fourth gear is fixedly connected to a thrust bearing, and the other side of the thrust bearing is fixedly connected to the inner wall of the rear end cover. One end of the sliding sleeve is fixedly connected to the first clutch plate, and a first electromagnet is fixedly installed in the first clutch plate. The operating block is fixedly connected to a mounting plate on the rotating shaft relative to the mounting plate, and one side of the mounting plate is fixedly connected to the second clutch plate. The second clutch A second electromagnet is provided in the clutch disc, a driving disc is rotatably connected between the first clutch disc and the second clutch disc, the operating block is connected to the middle of the driving disc through a sliding sleeve connector, the rotating shaft is connected to the middle of the other side of the driving disc through a rotating shaft connector, a mounting collar is fixedly connected in the rear end cover, the first clutch disc, the second clutch disc and the driving disc are all rotatably connected in the mounting collar, a plurality of mounting grooves are provided on the inner wall of the mounting collar, a centering calibration piece is fixedly connected in the mounting groove, the centering calibration piece is respectively fixedly connected to the outer ring side wall of the rolling bearing, and the outer peripheral edge of the driving disc is fixedly connected to the inner ring side wall of the rolling bearing.

[0017] In the bidirectional clutch, the specific structure of the sliding sleeve connection is as follows:

[0018] The sliding sleeve connecting piece includes a sliding sleeve block, a spline rod, and a first spring. A first hole is provided on the operating block on one side of the driving disk. The sliding sleeve is connected to the sliding sleeve in the first hole. One end of the sliding sleeve block is fixedly connected to the driving disk. A second key sleeve hole is provided at the other end of the sliding sleeve block. The sliding sleeve is connected to the spline rod in the second key sleeve hole. After the spline rod passes through the second key sleeve hole, it is fixedly connected to the bottom surface of the first hole. A first slot is provided on the end surface of the spline rod. The first slot is fixedly connected to the first spring. After passing through the first slot, the first spring is in contact with the inner wall of the second key sleeve hole.

[0019] In the bidirectional clutch, the specific structure of the rotating shaft connecting member is as follows:

[0020] The rotating shaft connecting part includes a rotating shaft sleeve, a rotating shaft rod, a second spring, and a rotating seat. A second hole is provided on the rotating shaft on one side of the driving disk, and the sliding sleeve is connected to the rotating shaft sleeve in the second hole. One end of the rotating shaft sleeve is fixedly connected to the other side of the driving disk. The other end of the rotating shaft sleeve is provided with a sleeve hole, and the sliding sleeve is connected to the rotating shaft rod in the sleeve hole. After the rotating shaft rod passes through the sleeve hole, it is fixedly connected to the rotating seat. The rotating seat is fixedly connected to the second hole, and a second slot is provided on the rotating shaft rod in the sleeve hole. The second spring is fixedly connected to the second slot, and the second spring is connected to the inner wall of the sleeve hole after passing through the second slot.

[0021] In the bidirectional clutch, the specific structure of the centering calibration piece is as follows:

[0022] The centering calibration part includes a sliding guide rod, a calibration block, a rolling wheel, and an elastic telescopic rod. The sliding guide rod is fixedly connected in the mounting groove, the calibration block is slidably connected on the sliding guide rod, the lower end of the calibration block is fixedly connected to the rolling bearing, a V-shaped groove is provided at the upper end of the calibration block, a rolling wheel is rollingly connected in the V-shaped groove, the rolling wheel is rotatably connected to the lower end of the elastic telescopic rod, and the elastic telescopic rod is embedded in the mounting groove.

[0023] Beneficial effects of the present invention:

[0024] 1. This invention utilizes a two-way clutch control design, combined with a linkage structure between the buffer stroke adjuster and the cylinder stroke adjuster, to achieve independent adjustment of the cylinder stroke length and the buffer stroke. This eliminates the need to disassemble the cylinder or shut down the machine; adjustment modes can be switched simply by rotating the operating block, significantly improving adjustment efficiency and convenience. This overcomes the drawback of traditional cylinders requiring downtime for component replacement or external limit devices.

[0025] 2. The buffer sleeve's telescopic design changes its extended length, creating a dynamic throttling area in conjunction with the first buffer chamber. As the sleeve enters the buffer chamber, the flow cross-sectional area between the guide slot and the oil trough gradually decreases with displacement, creating a buffering effect with a progressively increasing resistance gradient, effectively preventing rigid impact during high-speed piston movement. Furthermore, the sleeve's telescopic adjustment automatically matches the cylinder stroke, ensuring consistent buffering across different strokes, addressing the poor adaptability of traditional fixed buffer sleeves.

[0026] 3. The linkage design between the stroke adjustment block and the rear end cover uses a worm gear drive to precisely control the effective stroke space within the cylinder. The self-locking nature of the worm gear ensures position stability after adjustment, eliminating the risk of loosening of the mechanical limiter. Furthermore, adjustment is accomplished simply by rotating the operating block, eliminating the need for additional tools or complex operations, significantly reducing manual intervention costs.

[0027] 4. The two-way clutch uses electromagnets to control the switching of the drive and clutch plates, combined with the automatic reset function of the centering calibration block, to ensure the accuracy and safety of operating mode switching. The first and second electromagnets independently control the cylinder stroke adjustment and buffer adjustment to avoid interference caused by improper operation. At the same time, the combination of the rolling bearing and the V-groove of the calibration block further enhances the stability of the drive plate's centering, preventing equipment failure caused by improper operation during the movement of the piston block.

[0028] 5. Core components such as the cushion sleeve, stroke adjustment block, and adjustment rod adopt a modular design to accommodate cylinders of varying specifications and load requirements. The addition of a U-shaped bracket and guide groove enhances gear transmission stability and prevents jamming in multi-stage transmissions. This structure is particularly suitable for applications such as construction machinery and automated production lines where frequent adjustments to stroke and cushioning performance are required. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0030] Figure 2 It is a schematic diagram of a two-dimensional structure of a top view of a cross section of the present invention;

[0031] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the present invention;

[0032] Figure 4 for Figure 3 Schematic diagram of the connection structure of the middle buffer stroke adjustment part;

[0033] Figure 5 for Figure 3 Schematic diagram of the connection structure of the middle oil cylinder stroke adjustment part;

[0034] Figure 6 for Figure 3 Schematic diagram of the bidirectional clutch connection structure;

[0035] Figure 7 This is a schematic diagram of the structure of the buffer sleeve of the present invention;

[0036] Figure 8 This is a schematic diagram of the cross-sectional connection structure of the two-way clutch of the present invention;

[0037] Figure 9 for Figure 8 Schematic diagram of the connection structure of the center calibration piece;

[0038] Figure 10 for Figure 8 Schematic diagram of the connection structure of the middle sliding sleeve connector;

[0039] Figure 11 for Figure 8 Schematic diagram of the connection structure of the rotating shaft connector.

[0040] In the figure: 1 cylinder, 2 stroke adjustment block, 3 piston block, 4 slide groove hole, 5 guide column, 6 piston column, 7 front end cover, 8 first buffer chamber, 9 first oil port, 10 rear end cover, 11 second buffer chamber, 12 buffer block, 13 oil channel hole, 14 second oil port, 15 slot hole, 16 adjustment rod, 17 operating block;

[0041] 20 buffer sleeve, 201 sliding sleeve hole, 202 sliding groove, 203 gear rack, 204 oil groove hole, 205 guide groove hole, 206 oil guide hole;

[0042] 30 buffer stroke adjustment member, 301 first bevel gear, 302 second bevel gear, 303 first gear, 304 spline shaft, 305 rotating shaft, 306 rotating shaft, 307 first key sleeve hole, 308 U-shaped bracket, 309 guide groove;

[0043] 50 oil cylinder stroke adjustment member, 501 worm gear, 502 worm, 503 second gear, 504 connecting shaft, 505 third gear, 506 guide groove, 507 gear tooth groove;

[0044] 60 two-way clutch, 601 sliding sleeve, 602 first clutch plate, 603 second clutch plate, 604 driving plate, 605 centering calibration member, 606 fourth gear, 607 thrust bearing, 608 first electromagnet, 609 mounting plate, 610 second electromagnet, 611 sliding sleeve connector, 612 rotating shaft connector, 613 mounting collar, 614 mounting groove, 615 rolling bearing;

[0045] 6110 sliding block, 6111 spline rod, 6112 first spring, 6113 first key hole, 6114 second key hole, 6115 first slot hole;

[0046] 6120 rotating shaft sleeve, 6121 rotating shaft rod, 6122 second spring, 6123 rotating seat, 6124 second sleeve hole, 6125 shaft sleeve hole, 6126 second slot hole;

[0047] 6050 sliding guide rod, 6051 calibration block, 6052 rolling wheel, 6053 elastic telescopic rod. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] See also Figures 1-11, a cylinder with adjustable cylinder stroke and buffer stroke, including a cylinder barrel 1, a buffer sleeve 20, a buffer stroke adjusting member 30, a stroke adjusting block 2, a cylinder stroke adjusting member 50, and a two-way clutch 60. First, the piston in the cylinder barrel 1 is connected to a piston block 3, and the piston block 3 can be pushed to move inside the cylinder barrel 1 by hydraulic oil. A slide slot hole 4 is opened at one end of the piston block 3, and a sliding guide column 5 is fixedly connected to the inner bottom surface of the slide slot hole 4. A buffer sleeve 20 is slidably connected between the sliding guide column 5 and the inner wall of the slide slot hole 4. The buffer sleeve 20 is slidably connected to the sliding guide column 5. Please refer to Figure 7 In the present invention, a sleeve hole 201 is passed through the middle of the buffer sleeve 20, and a plurality of sliding grooves 202 are opened on the inner wall of the sleeve hole 201. A gear rack 203 is fixedly connected to one side of the inner wall of the sliding groove 202. The gear rack 203 is transmission-connected with the buffer stroke adjusting member 30. Through the interaction between the buffer stroke adjusting member 30 and the gear rack 203, the buffer sleeve 20 is driven to slide on the sliding guide column 5, thereby causing the buffer sleeve 20 to extend out of the sliding groove hole 4 or retract into the sliding groove hole 4. A plurality of oil groove holes 204 are opened on the edge of the port on one side of the buffer sleeve 20, and a plurality of guide groove holes 205 are opened between adjacent oil groove holes 204. A plurality of oil guide holes 206 connected to the oil groove holes 204 are opened on the outer wall of the buffer sleeve 20. A buffer stroke adjusting member 30 is provided in the sliding guide column 5. Please refer to Figure 3 and Figure 4The buffer stroke adjustment member 30 includes a first bevel gear 301, a second bevel gear 302, a first gear 303, a spline shaft 304, and a rotating shaft 305. The first bevel gear 301 is rotatably connected in the sliding guide column 5. A plurality of second bevel gears 302 are meshed and connected on the first bevel gear 301. One side of the second bevel gear 302 is fixedly connected to the first gear 303. The first gear 303 is movably connected in the sliding groove 202, and the gear rack 203 on one side of the sliding groove 202 is meshed and connected with the first gear 303. The middle part of the first bevel gear 301 is fixed. The rotating shaft 305 is connected, and the rotating shaft 305 is rotatably connected in the sliding guide column 5. After the rotating shaft 305 passes through the sliding guide column 5, it passes through the piston block 3 and the buffer block 12 in sequence. The stroke adjustment block 2 is rotatably connected to the rear end cover 10 with a rotating shaft 306. One end of the rotating shaft 306 is connected to the two-way clutch 60. A first key hole 307 is opened in the rotating shaft 306. The spline shaft 304 is slidably connected in the first key hole 307. After the rotating shaft 305 passes through the first key hole 307, it is fixedly connected to the spline shaft 304. After one end of the sliding guide column 5 passes through the slide hole 4, it is connected to the two-way clutch 60. The piston column 6 is fixedly connected, and the front cylinder port of the cylinder barrel 1 is connected with a front end cover 7. The piston column 6 is slidably connected to the front end cover 7, and a first buffer chamber 8 is provided between the piston column 6 and the front end cover 7. The outer wall of the front end cover 7 is provided with a first oil port 9. The first oil port 9 is communicated with the first buffer chamber 8 for the entry and exit of hydraulic oil. One end of the buffer sleeve 20 passes through the slide slot hole 4 and is plugged into the first buffer chamber 8. When working, the internal spline shaft 304 can be driven to rotate by the rotating shaft 306, and the spline shaft 304 drives the rotating shaft 305 to rotate, and the rotating shaft 305 drives The first bevel gear 301 at the other end rotates, and the first bevel gear 301 drives the second bevel gear 302 meshing with each other to rotate, and the second bevel gear 302 drives the first gear 303 on the coaxial side to rotate, and the first gear 303 and the gear rack 203 mesh with each other, thereby driving the buffer sleeve 20 to move outward from the chute hole 4 or retract inward through the gear rack 203. When moving outward, the matching length between the buffer sleeve 20 and the first buffer cavity 8 can be increased, that is, the buffer stroke of the oil cylinder is increased. When the buffer sleeve 20 retracts into the chute hole 4, the buffer stroke of the oil cylinder is reduced.

[0050] See also Figure 2 and Figure 7 In the present invention, the buffer sleeve 20 and the first buffer cavity 8 cooperate in the following buffering principle:

[0051] First, as the piston block 3 moves, one end of the buffer sleeve 20 reaches and gradually enters the first buffer chamber 8. At this time, the hydraulic oil on one side of the piston block 3 enters the oil groove hole 204 through the guide groove hole 205, and then enters the oil port through the oil groove hole 204 and is discharged. In this process, as the buffer sleeve 20 enters the first buffer chamber 8, the guide groove hole 205 that can be introduced into the oil groove hole 204 gradually decreases, that is, its throttling area becomes smaller and smaller, thereby generating greater resistance and the resistance gradually increases, so that the piston speed is reduced, thereby achieving a buffering effect. In addition, the present invention is provided with a self-locking device at one end of the rotating shaft 305, which releases the locking state of the rotating shaft 305 during the adjustment process, and locks the rotating shaft 305 after the adjustment is completed to avoid the buffer sleeve 20 retracting into the first buffer chamber 8 during the buffering process.

[0052] See also Figures 1-11 The rear port of the cylinder 1 is slidably connected to a stroke adjustment block 2. A second buffer chamber 11 is provided on the stroke adjustment block 2 at one end of the cylinder 1. A buffer block 12 is fixedly connected to the opposite side of the piston block 3. The head of the buffer block 12 is a platform structure. Figure 2 and Figure 3 , when buffering, the buffer block 12 gradually enters the second buffer chamber 11. During this process, the hydraulic oil in the second buffer chamber 11 will be squeezed out from the gap around the buffer block 12, thereby generating a larger resistance, thereby buffering the stroke of the piston block 3. An oil channel hole 13 is provided on the stroke adjustment block 2 on one side of the second buffer chamber 11. After the stroke adjustment block 2 passes through the cylinder barrel 1, it is fixedly connected to the rear end cover 10. A second oil port 14 is provided on the outer wall of the rear end cover 10. The second oil port 14 is connected to the oil channel hole 13 for the entry and exit of hydraulic oil. A plurality of slot holes 15 are provided on the rear end cover 10 on one side of the cylinder barrel 1. Adjustment rods 16 are slidably connected in the slot holes 15. After the adjustment rods 16 pass through the slot holes 15, they are respectively fixedly connected to the front end cover 7. A cylinder stroke adjustment member 50 is provided in the rear end cover 10 on the side of the slot hole 15. The cylinder stroke adjustment members 50 are respectively connected to the adjustment rods 16 in a transmission manner. Please refer to Figure 3 and Figure 5The oil cylinder stroke adjustment member 50 includes a worm gear 501, a worm 502, a second gear 503, a connecting shaft 504, and a third gear 505. A sliding guide groove 506 is provided on the adjusting rod 16 located in the slot hole 15, and gear tooth grooves 507 are respectively provided on the adjusting rod 16 on both sides of the sliding guide groove 506. The worm gear 501 is rotatably connected in the rear end cover 10 on one side of the slot hole 15. The second gear 503 is fixedly connected to the axis of the worm gear 501 on both sides, and the second gear 503 is respectively meshed with the gear tooth grooves 507. One side of the worm gear 501 is movably connected in the sliding guide groove 506, and the other side of the worm gear 501 is meshed with the worm 502. The worm 502 is fixedly connected to one end of the connecting shaft 504, and the other end of the connecting shaft 504 is fixedly connected to the third gear 505. The third gear 505 is connected to the two-way clutch 60. During specific operation, the two-way clutch 60 can drive the third gear 505 to rotate. The gear 505 rotates, and the third gear 505 drives the connecting shaft 504 to rotate. The connecting shaft 504 drives the worm 502 to rotate, and the worm 502 drives the worm wheel 501 to rotate. The worm wheel 501 drives the second gears 503 on both sides to rotate. The second gear 503 engages with the gear tooth groove 507, thereby pushing the adjusting rod 16 to move out of the slot hole 15 or retract into the slot hole 15. Under the reaction force, it drives the rear end cover 10 to move closer to or away from the cylinder barrel 1. When it moves away from the cylinder barrel 1, the rear end cover 10 drives the stroke adjusting block 2 to slide outward from the cylinder barrel 1, thereby increasing the internal space of the cylinder barrel 1 (the internal space of the cylinder barrel 1 becomes longer), that is, the sliding displacement of the piston block 3 becomes longer, that is, the cylinder stroke of the cylinder body becomes longer, and when the rear end cover 10 approaches the cylinder barrel 1, it drives the stroke adjusting block 2 to slide inward from the cylinder barrel 1, thereby compressing the displacement distance of the piston block 3, that is, the cylinder stroke of the cylinder body is shortened;

[0053] The outer end surface of the rear end cover 10 is rotatably connected to the operating block 17. The outer end surface of the operating block 17 is provided with an inner hexagonal slot for facilitating the use of tools such as wrenches. One end of the operating block 17 passes through the interior of the rear end cover 10 and is connected to the two-way clutch 60. The two-way clutch 60 is respectively connected to the buffer stroke adjustment member 30 and the cylinder stroke adjustment member 50. Figures 8-11, the two-way clutch 60 includes a sliding sleeve 601, a first clutch disc 602, a second clutch disc 603, a driving disc 604, a centering calibration piece 605, and a fourth gear 606. The operating block 17 in the rear end cover 10 is rotatably connected to the sliding sleeve 601, and the fourth gear 606 is fixedly connected to the sliding sleeve 601. The fourth gear 606 and the third gear 505 are meshed with each other. One side of the fourth gear 606 is fixedly connected to a thrust bearing 607, and the other side of the thrust bearing 607 is fixedly connected to the inner wall of the rear end cover 10. One end of the sliding sleeve 601 is fixedly connected to the first clutch disc 602, and a first electromagnet 608 is fixedly installed in the first clutch disc 602. A mounting plate 609 is fixedly connected to the rotating shaft 306 opposite to the operating block 17. One side of the mounting plate 609 is fixedly connected to the second clutch disc 603. The second clutch A second electromagnet 610 is provided in the disk 603, and a driving disk 604 is rotatably connected between the first clutch disk 602 and the second clutch disk 603. The operating block 17 is connected to the middle of the driving disk 604 through a sliding sleeve connector 611, and the rotating shaft 306 is connected to the middle of the other side of the driving disk 604 through a rotating shaft connector 612. A mounting collar 613 is fixedly connected to the rear end cover 10, and the first clutch disk 602, the second clutch disk 603 and the driving disk 604 are all rotatably connected to the mounting collar 613. The inner wall of the mounting collar 613 is provided with a plurality of mounting grooves 614, and the mounting grooves 614 are fixedly connected to the centering calibration parts 605. The centering calibration parts 605 are respectively fixedly connected to the outer ring side walls of the rolling bearings 615, and the outer peripheral edge of the driving disk 604 is fixedly connected to the inner ring side walls of the rolling bearings 615; please refer to Figure 11 In the two-way clutch 60, the shaft connector 612 includes a shaft sleeve 6120, a shaft rod 6121, a second spring 6122, and a rotating seat 6123. A second set of holes 6124 is provided on the rotating shaft 306 on one side of the driving disk 604. The sliding sleeve in the second set of holes 6124 is connected to the shaft sleeve 6120. One end of the shaft sleeve 6120 is fixedly connected to the other side of the driving disk 604. The other end of the shaft sleeve 6120 is provided with a shaft sleeve hole 6125. The inner sleeve of 125 is connected to a rotating shaft rod 6121. The rotating shaft rod 6121 passes through the shaft sleeve hole 6125 and is fixedly connected to the rotating seat 6123. The rotating seat 6123 is fixedly connected to the second sleeve hole 6124. The rotating shaft rod 6121 in the shaft sleeve hole 6125 has a second slot 6126 formed therein. The second slot 6126 is fixedly connected to the second spring 6122. The second spring 6122 passes through the second slot 6126 and contacts the inner wall of the shaft sleeve hole 6125.

[0054] In the two-way clutch 60, when the buffer stroke adjustment member 30 needs to be operated, please refer to Figure 10, combined with the specific structure of the sliding sleeve connector 611, the sliding sleeve connector 611 includes a sliding sleeve block 6110, a spline rod 6111, and a first spring 6112. A first set of holes 6113 are provided on the operating block 17 on one side of the drive disk 604. The sliding sleeve in the first set of holes 6113 is connected to the sliding sleeve block 6110. One end of the sliding sleeve block 6110 is fixedly connected to the drive disk 604. The other end of the sliding sleeve block 6110 is provided with a second key hole 6114. The second The sliding sleeve in the key hole 6114 is connected to a spline rod 6111, which is fixedly connected to the inner bottom surface of the first key hole 6113 after passing through the second key hole 6114. A first slot hole 6115 is opened on the end surface of the spline rod 6111, and a first spring 6112 is fixedly connected in the first slot hole 6115. The first spring 6112 passes through the first slot hole 6115 and contacts the inner wall of the second key hole 6114; at this time, the operation process is as follows: The second electromagnet 610 is energized and generates a magnetic field, which causes the driving disc 604 to approach the second clutch disc 603 and make contact with it through the magnetic force. At this time, the operating block 17 is rotated, and the operating block 17 drives the spline rod 6111 to rotate. The spline rod 6111 drives the sliding block 6110 to rotate, and the sliding block 6110 drives the driving disc 604 to rotate. The friction between the driving disc 604 and the second clutch disc 603 drives the rotating shaft 306 to rotate, and the rotating shaft 306 drives the internal spline rod 6111 to rotate. The spline rod 6111 drives the rotating shaft 305 to rotate (when the piston block 3 moves, it drives the rotating shaft 305 to move along the axis. At this time, the rotating shaft 305 drives the spline rod 6111 to slide relatively along the second key sleeve hole 6114 inside the rotating shaft 306). The rotating shaft 305 drives the first bevel gear 301 inside the sliding guide column 5 to rotate, thereby realizing the operation of the buffer stroke adjustment member 30;

[0055] When it is necessary to operate the cylinder stroke adjustment member 50, please refer to Figure 11 First, the circuit of the first electromagnet 608 is turned on. The magnetic force generated by the first electromagnet 608 drives the driving disc 604 to approach and contact the first clutch disc 602. Then, the operating block 17 is rotated. At this time, the operating block 17 drives the sliding sleeve block 6110 to rotate through the spline rod 6111, thereby driving the driving disc 604 to rotate. The driving disc 604 drives the first clutch disc 602 to rotate through friction. The first clutch disc 602 drives the sliding sleeve 601 to rotate in the same direction on the operating block 17. That is, the sliding sleeve 601 rotates synchronously with the operating block 17 at this time. The sliding sleeve 601 drives the fourth gear 606 to rotate. The fourth gear 606 drives the third gear 505 to rotate. The third gear 505 drives the cylinder stroke adjustment member 50 to perform related operations.

[0056] See also Figure 9In the two-way clutch 60, the center calibration member 605 includes a sliding guide rod 6050, a calibration block 6051, a rolling wheel 6052, and an elastic telescopic rod 6053. The sliding guide rod 6050 is fixedly connected in the mounting groove 614, and the calibration block 6051 is slidably connected to the sliding guide rod 6050. The lower end of the calibration block 6051 is fixedly connected to the rolling bearing 615. The upper end of the calibration block 6051 is provided with a V-shaped groove, and the rolling wheel 6052 is rotatably connected in the V-shaped groove. The rolling wheel 6052 is rotatably connected to the lower end of the elastic telescopic rod 6053, and the elastic telescopic rod 6053 is embedded in the mounting groove 614. When no power is supplied to either, in order to ensure that the drive disk 604 can be centered and stationary between the first clutch disk 602 and the second clutch disk 603, the elastic telescopic rod 6053 applies downward pressure to the scroll wheel 6052. When the scroll wheel 6052 is on one side of the V-groove of the calibration block 6051, the calibration block 6051 is driven to move along the sliding guide rod 6050 under the slope structure of the V-groove, so that the scroll wheel 6052 is in the middle of the calibration block 6051. During this process, the calibration block 6051 drives the rolling bearing 615 and the drive disk 604 to move, so that the drive disk 604 is between the first clutch disk 602 and the second clutch disk 603.

[0057] See also Figure 4 and Figure 7 In the technical solution of the present invention, U-shaped brackets 308 are fixedly connected to the sliding guide columns 5 on both sides of the first gear 303, and a runner groove is provided on the sliding guide column 5 on one side of the U-shaped bracket 308. The second bevel gear 302 is rotatably connected in the runner groove. The rotating shafts of the first gear 303 and the second bevel gear 302 are rotatably connected in the middle of the U-shaped bracket 308. A guide groove 309 is provided in the sliding groove 202, and the U-shaped bracket 308 is slidably connected in the guide groove 309. By adding the U-shaped bracket 308, the stability of the second bevel gear 302 and the first gear 303 can be increased, which is used to improve the operational stability of the buffer stroke adjustment member 30.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0059] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A cylinder with adjustable cylinder stroke and buffer stroke, comprising a cylinder barrel (1), a buffer sleeve (20), a buffer stroke adjusting member (30), a stroke adjusting block (2), a cylinder stroke adjusting member (50), and a two-way clutch (60), characterized in that: A piston block (3) is provided in the cylinder (1), a slide groove hole (4) is provided at one end of the piston block (3), a slide guide column (5) is fixed on the inner bottom surface of the slide groove hole (4), a buffer sleeve (20) is slidably connected between the slide guide column (5) and the inner wall of the slide groove hole (4), a buffer stroke adjusting member (30) is provided in the slide guide column (5), the buffer stroke adjusting member (30) is transmission-connected to the buffer sleeve (20), one end of the slide guide column (5) passes through the slide groove hole (4) and is connected to the piston column (6), the front cylinder port of the cylinder (1) is connected to the front end cover (7), the piston column (6) and the front end cover (7) are slidably connected and a first buffer chamber (8) is provided between the two, a first oil port (9) is provided on the outer wall of the front end cover (7), the first oil port (9) is communicated with the first buffer chamber (8), and one end of the buffer sleeve (20) passes through the slide groove hole (4) and is inserted into the first buffer chamber (8); A stroke adjustment block (2) is slidably connected in the rear cylinder port of the cylinder barrel (1), a second buffer chamber (11) is provided on the stroke adjustment block (2), a buffer block (12) is fixed on the opposite side of the piston block (3), the buffer block (12) is inserted into the second buffer chamber (11), an oil passage hole (13) is provided on the stroke adjustment block (2) on one side of the second buffer chamber (11), the stroke adjustment block (2) passes through the cylinder barrel (1) and is connected to the rear end cover (10), a second oil port (14) is provided on the outer wall of the rear end cover (10), the second oil port (14) is communicated with the oil passage hole (13), and a plurality of plugs are provided on the rear end cover (10). A slot hole (15) is slidably connected to an adjusting rod (16) in the slot hole (15), and the adjusting rod (16) is connected to the front cover (7) after passing through the slot hole (15). A cylinder stroke adjusting member (50) is provided in the rear cover (10), and the cylinder stroke adjusting member (50) is respectively connected to the adjusting rod (16) in a transmission manner. The rear cover (10) is rotatably connected to an operating block (17), and one end of the operating block (17) passes through the rear cover (10) and is connected to a two-way clutch (60), and the two-way clutch (60) is respectively connected to the buffer stroke adjusting member (30) and the cylinder stroke adjusting member (50) in a transmission manner. The stroke adjustment block (2) is rotatably connected to a rotating shaft (306) in the rear end cover (10), and one end of the rotating shaft (306) is connected to a two-way clutch (60); The oil cylinder stroke adjustment member (50) comprises a worm wheel (501), a worm (502), a connecting shaft (504), and a third gear (505); the other side of the worm wheel (501) is meshed with the worm (502); the worm (502) is fixedly connected to one end of the connecting shaft (504); the other end of the connecting shaft (504) is fixedly connected to the third gear (505); and the third gear (505) is connected to the two-way clutch (60); The two-way clutch (60) comprises a sliding sleeve (601), a first clutch disc (602), a second clutch disc (603), a driving disc (604), a centering calibration piece (605), and a fourth gear (606). The operating block (17) in the rear end cover (10) is rotatably connected to the sliding sleeve (601), and the sliding sleeve (601) is fixedly connected to the fourth gear (606). The fourth gear (606) is meshed with the third gear (505). The fourth gear (606) is connected to the third gear (505). 6) One side is fixedly connected to a thrust bearing (607), the other side of the thrust bearing (607) is fixedly connected to the inner wall of the rear end cover (10), one end of the sliding sleeve (601) is fixedly connected to a first clutch disc (602), a first electromagnet (608) is fixedly installed in the first clutch disc (602), a mounting disc (609) is fixedly connected to the rotating shaft (306) relative to the operating block (17), and one side of the mounting disc (609) is fixedly connected to the second clutch disc (603), The second clutch disc (603) is provided with a second electromagnet (610), a driving disc (604) is rotatably connected between the first clutch disc (602) and the second clutch disc (603), the operating block (17) is connected to the middle of the driving disc (604) via a sliding sleeve connector (611), the rotating shaft (306) is connected to the middle of the other side of the driving disc (604) via a rotating shaft connector (612), a mounting collar (613) is fixedly connected to the rear end cover (10), the first The clutch disc (602), the second clutch disc (603) and the driving disc (604) are all rotatably connected in the mounting collar (613); the inner wall of the mounting collar (613) is provided with a plurality of mounting grooves (614); the mounting grooves (614) are all fixedly connected with centering calibration pieces (605); the centering calibration pieces (605) are respectively fixedly connected to the outer ring side walls of the rolling bearing (615); the outer peripheral edge of the driving disc (604) is fixedly connected to the inner ring side walls of the rolling bearing (615); The centering calibration member (605) includes a sliding guide rod (6050), a calibration block (6051), a rolling wheel (6052), and an elastic telescopic rod (6053). The sliding guide rod (6050) is fixedly connected in the installation groove (614). The calibration block (6051) is slidably connected on the sliding guide rod (6050). The lower end of the calibration block (6051) is fixedly connected to the rolling bearing (615). The upper end of the calibration block (6051) is provided with a V-shaped groove. The rolling wheel (6052) is rollingly connected in the V-shaped groove. The rolling wheel (6052) is rotatably connected to the lower end of the elastic telescopic rod (6053). The elastic telescopic rod (6053) is engaged and connected in the installation groove (614).

2. The oil cylinder with adjustable oil cylinder stroke and buffer stroke according to claim 1, characterized in that: A sleeve hole (201) is provided through the middle of the buffer sleeve (20), a plurality of sliding grooves (202) are provided on the inner wall of the sleeve hole (201), a gear rack (203) is fixedly connected to one side of the inner wall of the sliding groove (202), the gear rack (203) is transmission-connected to the buffer stroke adjustment member (30), a plurality of oil groove holes (204) are provided on the edge of the port on one side of the buffer sleeve (20), a plurality of guide groove holes (205) are provided between adjacent oil groove holes (204), and a plurality of oil guide holes (206) connected to the oil groove holes (204) are provided on the outer wall of the buffer sleeve (20).

3. The oil cylinder with adjustable oil cylinder stroke and buffer stroke according to claim 2, characterized in that: The buffer stroke adjustment member (30) includes a first bevel gear (301), a second bevel gear (302), a first gear (303), a spline shaft (304), and a rotating shaft (305). The first bevel gear (301) is rotatably connected in the sliding guide column (5). A plurality of second bevel gears (302) are meshedly connected to the first bevel gear (301). One side of the second bevel gear (302) is fixedly connected to the first gear (303). The first gear (303) is movably connected in the sliding groove (202), and the gear rack (204) on one side of the sliding groove (202) is connected to the first bevel gear (301). 03) is meshed with the first gear (303), the middle part of the first bevel gear (301) is fixedly connected with a rotating shaft (305), the rotating shaft (305) is rotatably connected in the sliding guide column (5), the rotating shaft (305) passes through the sliding guide column (5) and then passes through the piston block (3) and the buffer block (12) in sequence, a first key sleeve hole (307) is opened in the rotating shaft (306), a spline shaft (304) is slidably connected in the first key sleeve hole (307), and the rotating shaft (305) is fixedly connected to the spline shaft (304) after passing through the first key sleeve hole (307).

4. The oil cylinder with adjustable oil cylinder stroke and buffer stroke according to claim 3, characterized in that: A U-shaped bracket (308) is fixedly connected to the sliding guide pillars (5) located on both sides of the first gear (303), and a rotating wheel groove is provided on the sliding guide pillar (5) on one side of the U-shaped bracket (308). The second bevel gear (302) is rotatably connected in the rotating wheel groove. The rotating shafts of the first gear (303) and the second bevel gear (302) are rotatably connected in the middle of the U-shaped bracket (308). A guide groove (309) is provided in the sliding groove (202), and the U-shaped bracket (308) is slidably connected in the guide groove (309).

5. The oil cylinder with adjustable oil cylinder stroke and buffer stroke according to claim 1, characterized in that: The oil cylinder stroke adjustment member (50) includes a worm wheel (501), a worm (502), a second gear (503), a connecting shaft (504), and a third gear (505). A guide groove (506) is provided on the adjustment rod (16) in the slot hole (15). Gear tooth grooves (507) are provided on the adjustment rod (16) on both sides of the guide groove (506). A worm wheel (501) is rotatably connected in the rear end cover (10) on one side of the slot hole (15). Second gears (503) are fixedly connected on both sides of the axis of the worm wheel (501). The second gears (503) are respectively meshed with the gear tooth grooves (507). One side of the worm wheel (501) is movably connected in the guide groove (506).

6. The oil cylinder with adjustable oil cylinder stroke and buffer stroke according to claim 1, characterized in that: The sliding sleeve connector (611) includes a sliding sleeve block (6110), a spline rod (6111), and a first spring (6112). A first hole (6113) is provided on the operating block (17) on one side of the drive disk (604). The sliding sleeve in the first hole (6113) is connected to the sliding sleeve block (6110). One end of the sliding sleeve block (6110) is fixedly connected to the drive disk (604). The other end of the sliding sleeve block (6110) is provided with a second key hole (6114). The second key hole (6115) is provided on the operating block (17) on one side of the drive disk (604). A spline rod (6111) is connected to the sliding sleeve in the key sleeve hole (6114). The spline rod (6111) is fixedly connected to the inner bottom surface of the first key sleeve hole (6113) after passing through the second key sleeve hole (6114). A first slot hole (6115) is opened on the end surface of the spline rod (6111). A first spring (6112) is fixedly connected in the first slot hole (6115). The first spring (6112) is connected to the inner wall of the second key sleeve hole (6114) after passing through the first slot hole (6115).

7. The oil cylinder with adjustable oil cylinder stroke and buffer stroke according to claim 1, characterized in that: The rotating shaft connecting member (612) includes a rotating shaft sleeve (6120), a rotating shaft rod (6121), a second spring (6122), and a rotating seat (6123). A second set of holes (6124) is provided on the rotating shaft (306) on one side of the driving disk (604). The rotating shaft sleeve (6120) is connected to a sliding sleeve in the second set of holes (6124). One end of the rotating shaft sleeve (6120) is fixedly connected to the other side of the driving disk (604). The other end of the rotating shaft sleeve (6120) is provided with a shaft sleeve hole (6125). The sliding sleeve is connected to a rotating shaft rod (6121), and the rotating shaft rod (6121) is fixedly connected to the rotating seat (6123) after passing through the shaft sleeve hole (6125). The rotating seat (6123) is fixedly connected in the second sleeve hole (6124). A second slot hole (6126) is opened on the rotating shaft rod (6121) in the shaft sleeve hole (6125). A second spring (6122) is fixedly connected in the second slot hole (6126). The second spring (6122) is connected to the inner wall of the shaft sleeve hole (6125) after passing through the second slot hole (6126).

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