A multi-section bundled oil cylinder applied to an aerial work platform and provided with bidirectional buffering

Abstract

The application discloses a multi-section bundled oil cylinder with bidirectional buffering applied to an aerial work platform, which comprises a primary oil cylinder, a secondary oil cylinder and a multi-section oil cylinder, the cylinder barrel of the primary oil cylinder is welded with the cylinder barrel of the secondary oil cylinder through a first supporting block, and the piston rod of the secondary oil cylinder is connected with the cylinder barrel of the next-stage oil cylinder through a second supporting block on one side, a through-flow block is fixed on one side of the secondary oil cylinder and the next-stage oil cylinder, first sealing rings are arranged on the two sides of the through-flow block, and the cylinder barrel of the primary oil cylinder and the cylinder barrel of the secondary oil cylinder are connected with an oil pipe on one side. The first buffering sleeve, the second buffering sleeve, the spring and the buffering adjusting ring are arranged, so that better bidirectional buffering effect can be realized in the stretching and recovery process of the oil cylinder, hydraulic impact is reduced, the stability of mechanical movement is ensured, and the life safety of operators is ensured. The cylinder barrel and the piston rod are connected to synchronously move and expand, and can be stacked after recovery, so that the length of the oil cylinder is shortened, the volume is reduced, and the required installation space is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-altitude operation vehicles, in particular to a multi-section bundled oil cylinder with bidirectional buffering applied to high-altitude operation vehicles. BACKGROUND

[0002] A high-altitude operation vehicle refers to a special vehicle that uses hydraulic transmission to transport workers and equipment to a height of more than 3 meters and performs aerial operations. The hydraulic oil cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or oscillating motion). The hydraulic oil cylinder is one of the important components of a high-altitude operation vehicle, and multiple oil cylinders are usually used in high-altitude operation vehicles.

[0003] The cylinder barrel of the existing multi-section oil cylinder is generally fixed, and only the piston rod moves, so the total length of the installed oil cylinder is equal to the sum of the lengths of the multiple oil cylinders. This is not conducive to high-altitude operations because the volume is large, it is easy to sway, and the safety is poor.

[0004] Therefore, the existing structure and deficiencies are improved, and a multi-section bundled oil cylinder with bidirectional buffering applied to high-altitude operation vehicles is proposed. SUMMARY

[0005] To solve the above problems, the present application provides a multi-section bundled oil cylinder with bidirectional buffering applied to high-altitude operation vehicles.

[0006] To achieve the above purpose, the present application realizes the following technical scheme: a multi-section bundled oil cylinder with bidirectional buffering applied to high-altitude operation vehicles, comprising a first oil cylinder, a second oil cylinder, and multiple oil cylinders, and the number of oil cylinders is not less than three; the cylinder barrel of the first oil cylinder is welded with the cylinder barrel of the second oil cylinder through a first support block, and the piston rod of the second oil cylinder is connected with the cylinder barrel of the next oil cylinder through a second support block; a flow-through block is fixed on one side of the second oil cylinder and the next oil cylinder, and a sealing ring is arranged on both sides of the flow-through block; the other side of the first oil cylinder cylinder barrel and the second oil cylinder cylinder barrel is provided with an oil pipe; a guide sleeve, an oil cylinder spacer, a first buffer sleeve, and a second buffer sleeve are sequentially arranged on the outer side of the first oil cylinder, the second oil cylinder, and the multiple oil cylinders from left to right, and a spring is arranged between the first buffer sleeve and the second buffer sleeve; a buffer adjusting ring is arranged at the connection between the first buffer sleeve and the second buffer sleeve and the piston rod.

[0007] Further, the first oil cylinder, the second oil cylinder, and the multiple oil cylinders are parallel to each other, and the piston rod of the second oil cylinder is connected with the cylinder barrel of the next oil cylinder and moves synchronously.

[0008] Further, the oil circuit of the second oil cylinder is connected with the oil circuit of the next oil cylinder through the flow-through block, and the oil circuit of the second oil cylinder is connected with the oil circuit of the first oil cylinder through the oil pipe.

[0009] Further, the tail of the primary oil cylinder, the secondary oil cylinder and the multi-stage oil cylinder is provided with a pressure measuring device, and the pressure measuring device is used for detecting the pressure change in the primary oil cylinder, the secondary oil cylinder and the multi-stage oil cylinder.

[0010] Further, the tail of the primary oil cylinder, the secondary oil cylinder and the multi-stage oil cylinder is provided with a pressure measuring device, and the pressure measuring device is used for detecting the pressure change in the primary oil cylinder, the secondary oil cylinder and the multi-stage oil cylinder.

[0011] Further, the tail of the primary oil cylinder, the secondary oil cylinder and the multi-stage oil cylinder is provided with a pressure measuring device, and the pressure measuring device is used for detecting the pressure change in the primary oil cylinder, the secondary oil cylinder and the multi-stage oil cylinder.

[0012] Further, the tail of the primary oil cylinder, the secondary oil cylinder and the multi-stage oil cylinder is provided with a pressure measuring device, and the pressure measuring device is used for detecting the pressure change in the primary oil cylinder, the secondary oil cylinder and the multi-stage oil cylinder.

[0013] Further, the tail of the primary oil cylinder, the secondary oil cylinder and the multi-stage oil cylinder is provided with a pressure measuring device, and the pressure measuring device is used for detecting the pressure change in the primary oil cylinder, the secondary oil cylinder and the multi-stage oil cylinder.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] 1. The present application bundles multiple oil cylinders together, and the primary oil cylinder barrel and the secondary oil cylinder barrel can move synchronously after being connected, and the secondary oil cylinder piston rod and the next stage oil cylinder barrel can move synchronously after being connected, so that the equipment can meet the height requirement when being deployed, and can be stacked together to reduce the volume when being recovered, thereby reducing the installation space and the overall height of the equipment on one hand, and reducing the high-altitude shaking of the equipment on the other hand, thereby increasing the safety and reliability of high-altitude operation.

[0016] 2. The present application realizes the sequential extension and recovery of the oil cylinders, and the pressure measuring device is arranged at the tail of the oil cylinder, which can detect the pressure change in the primary oil cylinder, the secondary oil cylinder and the tertiary oil cylinder, and can also remove the air generated during the operation of the oil cylinder, thereby achieving the safety and stability.

[0017] 3. The spring is arranged between the first buffer sleeve and the second buffer sleeve, and the buffer adjusting ring is arranged between the two buffer sleeves and the piston rod, so that the two-way buffering effect is good during the extension and recovery of the oil cylinder, and the hydraulic impact is reduced, thereby ensuring the stability of mechanical movement and the safety of the operator.

[0018] 4. The oil passage is arranged on the first buffer sleeve and the second buffer sleeve, thereby increasing the flow of the single-acting cylinder, and facilitating the solution of the problem of uniform speed of the high-altitude operation vehicle.

[0019] 5. The one-way damping piece is arranged at the oil inlet, so that the oil cylinder can achieve low speed and stability when being retracted. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The cross-sectional structure schematic diagram of the oil cylinder of the embodiment one of the present application;

[0021] Figure 2 The oil liquid flow structure schematic diagram of the oil cylinder of the embodiment one of the present application;

[0022] Figure 3 The oil liquid flow structure schematic diagram of the oil cylinder of the embodiment one of the present application;

[0023] Figure 4 The cross-sectional structure schematic diagram of the oil cylinder of the embodiment one of the present application;

[0024] Figure 5 The overall structure schematic diagram of the oil cylinder of the embodiment one of the present application;

[0025] Figure 6 The side view structure schematic diagram of the oil cylinder of the embodiment one of the present application;

[0026] Figure 7 The separation state diagram of the first buffer sleeve and the second buffer sleeve when the oil cylinder is stretched;

[0027] Figure 8 The buffer effect diagram realized by the buffer adjusting ring when the oil cylinder is stretched;

[0028] Figure 9 The separation state diagram of the first buffer sleeve and the second buffer sleeve when the oil cylinder is recovered;

[0029] Figure 10 The buffer effect diagram realized by the buffer adjusting ring when the oil cylinder is recovered;

[0030] Figure 11 The structure schematic diagram of the oil inlet and the one-way damping sheet;

[0031] Figure 12 The hydraulic principle diagram of the oil inlet of the oil cylinder;

[0032] Figure 13 The position schematic diagram of the first or third buffer sleeve and the oil hole.

[0033] Figure 14 The overall structure schematic diagram of the oil cylinder of the embodiment two of the present application;

[0034] Figure 15 The overall structure schematic diagram of the oil cylinder of the embodiment three of the present application;

[0035] In the diagram: 1. First-stage hydraulic cylinder; 2. Second-stage hydraulic cylinder; 3. First support block; 4. Third-stage hydraulic cylinder; 5. Second support block; 6. Flow block; 7. Oil pipe; 8. Sealing ring; 9. Pressure measuring device; 10. First buffer sleeve; 11. Cylinder spacer; 12. Spring; 13. Second buffer sleeve; 14. Buffer adjusting ring; 15. Cylinder bottom; 16. One-way damping plate; 17. Electromagnetic directional valve; 18. Oil inlet; 19. Guide sleeve; 20. Dustproof ring; 21. U-shaped retaining ring; 22. O-ring seal; 23. Piston rod; 24. Oil passage hole; 25. Fourth-stage hydraulic cylinder; 26. Fifth-stage hydraulic cylinder. Detailed Implementation

[0036] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention. Example 1:

[0037] like Figures 1-13 As shown, the binding cylinder with bidirectional buffer applied to the aerial work platform in this embodiment has three sections: a primary cylinder 1, a secondary cylinder 2, and a tertiary cylinder 4. The cylinder barrel of the primary cylinder 1 is welded to the cylinder barrel of the secondary cylinder 2 via a first support block 3. To improve welding reliability, multiple first support blocks 3 can be welded to both sides of the cylinder barrel. The piston rod 23 of the secondary cylinder 2 is connected to the cylinder barrel of the tertiary cylinder 4 via a second support block 5. The primary cylinder 1, secondary cylinder 2, and tertiary cylinder 4 are parallel to each other, and the cylinder barrels of the primary cylinder 1 and secondary cylinder 2 can move synchronously after being connected. The cylinder barrel of the tertiary cylinder 4 can also move synchronously after being connected to the piston rod 23 of the secondary cylinder 2. Pressure measuring devices 9 are installed at the tail of the primary cylinder 1, secondary cylinder 2, and tertiary cylinder 4. The pressure measuring devices 9 are used to detect the pressure changes inside the primary cylinder 1, secondary cylinder 2, and tertiary cylinder 4, and can also remove air generated during cylinder operation, achieving a safe and stable function.

[0038] like Figure 1 , 2 As shown, a flow block 6 is fixed on one side of the secondary cylinder 2 and the tertiary cylinder 4, and a sealing ring 8 is provided on both sides of the flow block 6. An oil pipe 7 is installed on the other side of the cylinder barrel of the primary cylinder 1 and the cylinder barrel of the secondary cylinder 2. The oil circuit of the tertiary cylinder 4 is connected to the oil circuit of the secondary cylinder 2 through the flow block 6, and the oil circuit of the secondary cylinder 2 is connected to the oil circuit of the primary cylinder 1 through the oil pipe 7.

[0039] Specifically, the extension of the third-stage hydraulic cylinder 4 allows the oil to enter the second-stage hydraulic cylinder 2 through the flow block 6 in the direction of the arrow. The sealing rings 8 designed on both sides of the flow block 6 help prevent oil leakage from the hydraulic cylinder. The extension of the second-stage hydraulic cylinder 2 allows the oil to continue to enter the first-stage hydraulic cylinder 1 through the oil pipe 7 in the direction of the arrow, and finally extends the first-stage hydraulic cylinder 1.

[0040] As Figure 1 , 7 , 8, 9, 10, the outer side of the primary cylinder 1, secondary cylinder 2 and tertiary cylinder 4 are sequentially provided with a guide sleeve 19, cylinder spacer 11, first buffer sleeve 10 and second buffer sleeve 13 from left to right, and a spring 12 is arranged between the first buffer sleeve 10 and the second buffer sleeve 13, and the first buffer sleeve 10 and the second buffer sleeve 13 are arranged with a buffer adjusting ring 14 close to one side of the primary cylinder 1, secondary cylinder 2 and tertiary cylinder 4; the cross section of the first buffer sleeve 10 and the second buffer sleeve 13 is in "L" type structure, and the first buffer sleeve 10 and the second buffer sleeve 13 are embedded with each other in the retracted state; the circumference of the first buffer sleeve 10 and the second buffer sleeve 13 is provided with an oil passage 24;

[0041] Specifically, when the cylinder is stretched, the first buffer sleeve 10 first contacts the cylinder spacer 11, the spring 12 is in a fully expanded state, and the second buffer sleeve 13 is in a separated state from the first buffer sleeve 10, as shown in Figure 7 ; with the continuous extension of the cylinder, the hydraulic oil in the closed area of the spring 12, the first buffer sleeve 10 and the second buffer sleeve 13 is compressed, and the installed buffer adjusting ring 14 can make the hydraulic oil in the above-mentioned closed area only flow out through the gap between the first buffer sleeve 10, the second buffer sleeve 13 and other parts, so that better buffering effect is achieved during extension, as shown in Figure 8 ; when the cylinder is retracted, the second buffer sleeve 13 contacts the cylinder bottom 15, the spring 12 is in a fully expanded state, and the first buffer sleeve 10 is in a separated state from the second buffer sleeve 13, as shown in Figure 9 ; with the continuous retraction of the cylinder, the hydraulic oil in the closed area of the spring 12 and the first buffer sleeve 10 and the second buffer sleeve 13 is compressed, and the installed buffer adjusting ring 14 can make the hydraulic oil in the above-mentioned closed area only flow out through the gap between the first buffer sleeve 10, the second buffer sleeve 13 and other parts, so that better buffering effect is achieved during retraction, as shown in Figure 10 .

[0042] As shown in Figure 13 , the circumference of the first buffer sleeve 10 and the second buffer sleeve 13 is provided with an oil passage 24, which can increase the flow of hydraulic oil in the single-acting cylinder, avoid the phenomenon that the oil flow is not uniform and the oil supply is not timely due to the overlength of the cylinder barrel, and realize the effect of uniform speed of the aerial work platform ascending and descending.

[0043] As shown in Figure 1 , the guide sleeve 19 and the inner side of the primary cylinder 1, secondary cylinder 2 and tertiary cylinder 4 are sequentially provided with a dustproof ring 20, a U-shaped retainer 21 and an O-shaped sealing ring 22 from left to right;

[0044] Specifically, the dustproof ring 20, the U-shaped blocking ring 21 and the O-shaped sealing ring 22 can enhance the sealing performance and can prevent dust from entering the surface of the oil cylinder during the expansion or recovery of the first oil cylinder 1, the second oil cylinder 2 and the third oil cylinder 4.

[0045] As shown in Figure 1 、 11 , the lower side of the cylinder bottom 15 of the third oil cylinder 4 is provided with an oil inlet 18, a one-way damping sheet 16 is installed at the lower side port of the oil inlet 18, and an electromagnetic reversing valve 17 is installed at the upper side of the oil inlet 18;

[0046] The one-way damping sheet 16 and the electromagnetic reversing valve 17 are added to the oil inlet 18 to solve the problem of rapid ascent and low-speed descent of the aerial work vehicle. Specifically, when the oil cylinder is expanded, the electromagnetic reversing valve 17 is not powered, the pressure of the oil inlet 18 pushes the one-way damping sheet 16 to move upwards, so that the hydraulic oil can flow into the oil cylinder through the middle hole of the one-way damping sheet 16 and the four sides of the damping sheet; when the oil cylinder is recovered, the electromagnetic reversing valve 17 is powered, and the electromagnetic reversing valve 17 pushes the one-way damping sheet 16 to move downwards, at this time the hydraulic oil can only flow back to the oil tank through the middle hole of the one-way damping sheet 16, as shown in Figure 9 , to achieve the purpose of slowing down the descent speed, thereby facilitating the realization of rapid ascent and low-speed descent of the aerial work vehicle.

[0047] Specifically, when expanded, the hydraulic oil first enters the third oil cylinder 4 from the oil inlet 18, so that the cylinder barrel of the third oil cylinder 4 is relatively expanded with its piston rod 23, and the maximum range of expansion is the stroke of the oil cylinder, thereby making the overall equipment ascend to the height of the stroke of the oil cylinder; after the oil enters the third oil cylinder 4 to expand the cylinder barrel to the right position, the oil enters the second oil cylinder 2 through the flow block 6, so that the cylinder barrel of the second oil cylinder 2 is expanded relative to its piston rod 23, and the maximum range of expansion is the stroke of the oil cylinder; during the expansion of the third oil cylinder 4 and the second oil cylinder 2, since the cylinder barrel of the third oil cylinder 4 is connected with the piston rod 23 of the second oil cylinder 2, the cylinder barrel of the third oil cylinder 4 will drive the piston rod 23 of the second oil cylinder 2 to move upwards at the same time during the expansion of the cylinder barrel of the third oil cylinder 4, thereby making the overall equipment ascend to the height of 2 strokes of the oil cylinder; since the cylinder barrel of the first oil cylinder 1 is welded with the cylinder barrel of the second oil cylinder 2 through the first support block 3, when the second oil cylinder 2 is expanded, the oil can enter the first oil cylinder 1 through the oil pipe 7, so that the piston rod 23 of the first oil cylinder 1 is expanded, and the maximum range of expansion is the stroke of the oil cylinder, finally making the overall equipment ascend to the height of 3 strokes of the oil cylinder, thereby meeting the height requirement of aerial work;

[0048] When the equipment is recovered, the piston rod 23 of the first oil cylinder 1 is first recovered by the self weight of the vehicle, so that the whole equipment is lowered by the height of one oil cylinder stroke; the oil in the first oil cylinder 1 enters the second oil cylinder 2 through the oil pipe 7, so that the cylinder barrel of the second oil cylinder 2 is recovered by one oil cylinder stroke, and since the cylinder barrel of the second oil cylinder 2 is connected with the cylinder barrel of the first oil cylinder 1, the whole equipment is lowered by the height of two oil cylinder strokes; when the cylinder barrel of the second oil cylinder 2 is recovered, the oil in the second oil cylinder 2 enters the third oil cylinder 4 through the flow block 6, so that the third oil cylinder 4 is recovered by one oil cylinder stroke, and since the cylinder barrel of the third oil cylinder 4 is connected with the piston rod 23 of the second oil cylinder 2, the piston rod 23 of the second oil cylinder 2 moves downward synchronously when the third oil cylinder 4 is recovered, so that the whole equipment is finally lowered by the height of three oil cylinder strokes stacked together, the volume of the whole equipment is reduced, the installation space is reduced, the shaking is avoided, and the safety and reliability of the aerial work are increased.

[0049] The working principle of the first embodiment is as follows: in the use process, the oil cylinders are sequentially stretched and recovered, when the oil cylinders are stretched, the oil of the oil cylinders enters from the A port, the third oil cylinder 4 is first stretched, then the oil enters the second oil cylinder 2 through the flow block 6 in the arrow direction, the second oil cylinder 2 is stretched, and finally the oil enters the first oil cylinder 1 through the oil pipe 7 in the arrow direction, and finally the first oil cylinder 1 is stretched, in this process, the first buffer sleeve 10 first contacts the oil cylinder isolation sleeve 11, the spring 12 is in a completely stretched state, the second buffer sleeve 13 is in a separated state with the first buffer sleeve 10, and as the oil cylinder continues to stretch, the hydraulic oil in the closed area of the spring 12 and the first buffer sleeve 10 and the second buffer sleeve 13 is compressed, the hydraulic oil in the closed area flows out through the gap between the parts, and the setting of the buffer adjusting ring 14 can adjust the buffer effect when stretching; and when the oil cylinder is stretched, the electromagnetic reversing valve 17 is not electrified, the pressure of the oil inlet 18 pushes the one-way damping piece 16 to move upward, and the hydraulic oil can flow into the oil cylinder through the middle hole of the one-way damping piece 16 and the four around the one-way damping piece 16;

[0050] When the hydraulic cylinder retracts, the vehicle's own weight retracts the first-stage cylinder 1 first, then the second-stage cylinder 2, and finally the third-stage cylinder 4. The hydraulic fluid flows according to the arrow direction. During this process, the second buffer sleeve 13 contacts the cylinder bottom 15, the spring 12 is fully extended, and the first buffer sleeve 10 and the second buffer sleeve 13 are separated. As the cylinder continues to retract, the hydraulic fluid in the sealed areas of the spring 12, the first buffer sleeve 10, and the second buffer sleeve 13 is compressed. The hydraulic fluid in these sealed areas flows out through the gaps between the parts. The buffer adjustment ring 1... The setting 4 can adjust the buffering effect during recovery. When the cylinder is retracted, the solenoid directional valve 17 is energized, and the solenoid directional valve 17 pushes the one-way damping plate 16 downward. At this time, the hydraulic oil can only flow back to the oil tank through the middle hole of the one-way damping plate 16, thereby slowing down the descent speed. In order to achieve the effect of uniform ascent and descent of the aerial work platform, oil passage holes 24 are added to the first buffer sleeve 10 and the second buffer sleeve 13 to increase the flow of the single-acting cylinder. This completes the application process of the three-section binding cylinder with bidirectional buffering in the aerial work platform. Example 2:

[0051] like Figure 14 As shown, the binding cylinder with bidirectional buffer applied to the aerial work platform in this embodiment has four sections, namely, a fourth-stage cylinder 25 is added to the basic structure of the first-stage cylinder 1, the second-stage cylinder 2, and the third-stage cylinder 4. Specifically, the cylinder barrel of the first-stage cylinder 1 is welded to the cylinder barrel of the second-stage cylinder 2 through the first support block 3, the piston rod 23 of the second-stage cylinder 2 is connected to the cylinder barrel of the third-stage cylinder 4 through the second support block 5, and the piston rod 23 of the third-stage cylinder 4 is connected to the cylinder barrel of the fourth-stage cylinder 25 through the second support block 5. The first-stage cylinder 1, the second-stage cylinder 2, the third-stage cylinder 4, and the fourth-stage cylinder 25 are parallel to each other. The cylinder barrel of the third-stage cylinder 4 can move synchronously after being connected to the piston rod 23 of the second-stage cylinder 2, the cylinder barrel of the fourth-stage cylinder 25 can move synchronously after being connected to the piston rod 23 of the third-stage cylinder 4, and the cylinder barrel of the first-stage cylinder 1 can move synchronously after being connected to the cylinder barrel of the second-stage cylinder 2.

[0052] A flow passage block 6 is fixed on one side of the third-stage hydraulic cylinder 4 and the fourth-stage hydraulic cylinder 25. A flow passage block 6 is also fixed on one side of the second-stage hydraulic cylinder 2 and the third-stage hydraulic cylinder 4. A sealing ring 8 is provided on both sides of each flow passage block 6. An oil pipe 7 is installed on the other side of the cylinder barrel of the first-stage hydraulic cylinder 1 and the cylinder barrel of the second-stage hydraulic cylinder 2. The oil circuit of the fourth-stage hydraulic cylinder 25 is connected to the oil circuit of the third-stage hydraulic cylinder 4 through the flow passage block 6. The oil circuit of the third-stage hydraulic cylinder 4 is connected to the oil circuit of the second-stage hydraulic cylinder 2 through the flow passage block 6. The oil circuit of the second-stage hydraulic cylinder 2 is connected to the oil circuit of the first-stage hydraulic cylinder 1 through the oil pipe 7.

[0053] In this embodiment, the other structures and functions of the four-section binding cylinder, as well as the operating principle during the extension and retraction process, are the same as in Embodiment 1. Therefore, the four-section binding cylinder can raise the overall equipment to the height of four cylinder strokes. Example 3:

[0054] like Figure 15 As shown, the binding cylinder with bidirectional buffer applied to the aerial work platform in this embodiment has five sections, namely, a fourth-stage cylinder 25 and a fifth-stage cylinder 26 added to the existing first-stage cylinder 1, second-stage cylinder 2, and third-stage cylinder 4. Specifically, the cylinder barrel of the first-stage cylinder 1 is welded to the cylinder barrel of the second-stage cylinder 2 via a first support block 3. The piston rod 23 of the second-stage cylinder 2 is connected to the cylinder barrel of the third-stage cylinder 4 via a second support block 5. The piston rod 23 of the third-stage cylinder 4 is connected to the cylinder barrel of the fourth-stage cylinder 25 via the second support block 5. The piston of the fourth-stage cylinder 25... Rod 23 is connected to the cylinder of the fifth-stage hydraulic cylinder 26 via the second support block 5; the first-stage hydraulic cylinder 1, the second-stage hydraulic cylinder 2, the third-stage hydraulic cylinder 4, the fourth-stage hydraulic cylinder 25, and the fifth-stage hydraulic cylinder 26 are parallel to each other. The cylinder of the third-stage hydraulic cylinder 4 can move synchronously after being connected to the piston rod 23 of the second-stage hydraulic cylinder 2. The cylinder of the fourth-stage hydraulic cylinder 25 can move synchronously after being connected to the piston rod 23 of the third-stage hydraulic cylinder 4. The cylinder of the fifth-stage hydraulic cylinder 26 can move synchronously after being connected to the piston rod 23 of the fourth-stage hydraulic cylinder 25. The cylinder of the first-stage hydraulic cylinder 1 can move synchronously after being connected to the cylinder of the second-stage hydraulic cylinder 2.

[0055] A flow passage block 6 is fixed to one side of the fourth-stage hydraulic cylinder 25 and the fifth-stage hydraulic cylinder 26. A flow passage block 6 is fixed to one side of the third-stage hydraulic cylinder 4 and the fourth-stage hydraulic cylinder 25. A flow passage block 6 is fixed to one side of the second-stage hydraulic cylinder 2 and the third-stage hydraulic cylinder 4. A sealing ring 8 is provided on both sides of each flow passage block 6. An oil pipe 7 is installed on the other side of the cylinder barrel of the first-stage hydraulic cylinder 1 and the cylinder barrel of the second-stage hydraulic cylinder 2. The oil circuit of the fifth-stage hydraulic cylinder 26 is connected to the oil circuit of the fourth-stage hydraulic cylinder 25 through the flow passage block 6. The oil circuit of the fourth-stage hydraulic cylinder 25 is connected to the oil circuit of the third-stage hydraulic cylinder 4 through the flow passage block 6. The oil circuit of the third-stage hydraulic cylinder 4 is connected to the oil circuit of the second-stage hydraulic cylinder 2 through the flow passage block 6. The oil circuit of the second-stage hydraulic cylinder 2 is connected to the oil circuit of the first-stage hydraulic cylinder 1 through the oil pipe 7.

[0056] In this embodiment, the other structures and functions of the five-section binding cylinder, as well as the operating principle during the extension and retraction process, are the same as in Embodiment 1. Therefore, the five-section binding cylinder can raise the overall equipment to the height of five cylinder strokes.

[0057] Similarly, based on the required operating height of the aerial work platform, the aforementioned tie-down cylinder with bidirectional buffer can be expanded into a multi-stage tie-down cylinder. This not only meets the requirements for operating height but also allows them to be stacked together to reduce volume, installation space, and height, thereby reducing swaying and increasing safety and reliability for aerial work.

[0058] The embodiments of the present application are presented by way of example and description, and are not intended to be exhaustive or to limit the application to the form disclosed. Many modifications and variations will be apparent to those skilled in the art. Embodiments are chosen and described in order to best explain the principles of the application and its practical application, and to thereby enable others skilled in the art to best utilize the application in various embodiments and with various modifications as are suited to the particular use contemplated.

Claims

1. A multi-section bundled oil cylinder applied to an aerial work platform and having bidirectional buffering, characterized in that, The application relates to a multi-stage oil cylinder, which comprises a first-stage oil cylinder (1), a second-stage oil cylinder (2) and multi-stage oil cylinders, and the number of the oil cylinders is not less than three; the cylinder barrel of the first-stage oil cylinder (1) is welded with the cylinder barrel of the second-stage oil cylinder (2) through a first supporting block (3), and the piston rod (23) of the second-stage oil cylinder (2) is connected with the cylinder barrel of the next-stage oil cylinder through a second supporting block (5); one side of the second-stage oil cylinder (2) and the next-stage oil cylinder is fixed with a through-flow block (6), one side of the through-flow block (6) is provided with a sealing ring (8), and the other side of the cylinder barrel of the first-stage oil cylinder (1) and the cylinder barrel of the second-stage oil cylinder (2) is provided with an oil pipe (7); the outer sides of the first-stage oil cylinder (1), the second-stage oil cylinder (2) and the multi-stage oil cylinders are sequentially provided with a guide sleeve (19), an oil cylinder spacer sleeve (11), a first buffer sleeve (10) and a second buffer sleeve (13) from left to right, a spring (12) is arranged between the first buffer sleeve (10) and the second buffer sleeve (13), and buffer adjusting rings (14) are arranged at the connecting positions of the first buffer sleeve (10), the second buffer sleeve (13) and the piston rod (23); the lower side of the last-stage oil cylinder of the multi-stage oil cylinders is provided with an oil inlet (18) at one side of the cylinder bottom (15), a one-way damping sheet (16) is arranged at the lower side end of the oil inlet (18), and an electromagnetic reversing valve (17) is arranged at the upper side of the oil inlet (18); the cross sections of the first buffer sleeve (10) and the second buffer sleeve (13) are all in the shape of "L", the first buffer sleeve (10) and the second buffer sleeve (13) are embedded with each other in the retracted state, and oil through holes (24) are formed in the circumferences of the first buffer sleeve (10) and the second buffer sleeve (13).

2. The multi-section bundled oil cylinder applied to the aerial work platform and provided with bidirectional buffering according to claim 1, characterized in that, The first-stage oil cylinder (1), the second-stage oil cylinder (2) and the multi-stage oil cylinders are parallel to each other, and the piston rod (23) of the second-stage oil cylinder (2) can synchronously move after being connected with the cylinder barrel of the next-stage oil cylinder.

3. The multi-section bundled oil cylinder with bidirectional buffering applied to the aerial work platform according to claim 1 or 2, characterized in that, The oil circuit of the second-stage oil cylinder (2) is communicated with the oil circuit of the next-stage oil cylinder through the through-flow block (6), and the oil circuit of the second-stage oil cylinder (2) is communicated with the oil circuit of the first-stage oil cylinder (1) through the oil pipe (7).

4. The multi-section bundled oil cylinder applied to the aerial work platform and provided with bidirectional buffering according to claim 3, characterized in that, Pressure measuring devices (9) are arranged at the tail portions of the first-stage oil cylinder (1), the second-stage oil cylinder (2) and the multi-stage oil cylinders, and the pressure measuring devices (9) are used for detecting the pressure changes in the first-stage oil cylinder (1), the second-stage oil cylinder (2) and the multi-stage oil cylinders.

5. The multi-section bundled oil cylinder with bidirectional buffering applied to the aerial work platform according to claim 1, characterized in that, The inner sides of the guide sleeve (19), the first-stage oil cylinder (1), the second-stage oil cylinder (2) and the multi-stage oil cylinders are sequentially provided with a dustproof ring (20), a U-shaped blocking ring (21) and an O-shaped sealing ring (22) from left to right.

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