A multi-stage piston hydraulic tension cylinder

Abstract

The present invention relates to the technical field of hydraulic pulling cylinders, and specifically to a multi-stage piston hydraulic pulling cylinder, comprising a shell, a cylinder body is fixedly installed on the inner wall of the bottom of the shell, a limiting plate is fixedly installed on the top of the cylinder body, a rack is fixedly installed on one side of the cylinder body, a control panel is provided on one side of the shell, a No. 1 rotating rod is rotatably installed on the inner wall of the shell, and a power generation mechanism matched with the rack is provided inside the shell. The present invention drives the first gear to drive the No. 2 gear to rotate on the No. 2 rotating rod through the movement of the rack, thereby driving the coil to cut the magnetic flux lines between the two magnets, and then generating current, and then transmitting the generated current to the solenoid valve through the commutator. The solenoid valve is started to make the lubricating oil in the oil tank flow, and finally reaches the nozzle to lubricate the cylinder in time, thereby reducing the serious damage to the components inside the cylinder due to wear.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic pulling cylinders, in particular to a multi-stage piston hydraulic pulling cylinder. Background Art

[0002] A hydraulic cylinder is generally composed of a cylinder body, a piston, a piston rod and a cylinder head. The hydraulic cylinder is the actuator in the hydraulic system. The hydraulic system is driven by a prime mover to drive a hydraulic pump, and the hydraulic pump drives the hydraulic cylinder to move. The prime mover includes an electric motor driven by electricity and an engine driven by engine oil.

[0003] The existing patent (publication number: CN112065815A) is a multi-stage piston hydraulic pulling cylinder, including a base, the upper surface of the base is fixedly connected to a cylinder mechanism, the base is symmetrically provided with two supporting mechanisms about the cylinder mechanism, and a spring mechanism is provided inside the two supporting mechanisms. When in use, the mounting seat is lifted upward by the multi-stage piston hydraulic pulling cylinder, and at the same time, the mounting seat drives the second latch tooth to rise upward through the fixed rod. After the mounting seat rises to the top position, the spring pushes the positioning block to move outward, and the positioning block drives the first latch tooth to engage with the second latch tooth, thereby positioning the fixed rod and supporting the mounting seat, thereby reducing the pressure of the mounting seat on the multi-stage piston hydraulic pulling cylinder, thereby avoiding the multi-stage piston hydraulic pulling cylinder being subjected to a large pressure, which will greatly affect the service life of the multi-stage piston hydraulic pulling cylinder.

[0004] The invention is provided with a plurality of transmission structures including a multi-stage piston hydraulic tension cylinder, a mounting seat, a movable cavity, a through hole, a movable plate, a threaded rod, a nut, a fixed rod, a fixed hole, a positioning groove, a positioning block, a first latch tooth, a second latch tooth, a limit groove, a limit rod and a spring, so mechanical friction is inevitably generated. When the multi-stage hydraulic cylinder is powered by an engine, it is difficult to achieve timely lubrication of the inside of the cylinder, which is easy to cause damage to the components inside the cylinder, thereby affecting the use of the cylinder and reducing the working efficiency of the cylinder.

[0005] Therefore, a multi-stage piston hydraulic tension cylinder is proposed. Summary of the invention

[0006] The object of the present invention is to provide a multi-stage piston hydraulic pulling cylinder, which drives the first gear to drive the second gear to rotate on the second rotating rod through the movement of the rack, thereby driving the coil to cut the magnetic flux lines between the two magnets, and then generate current, and then transmit the generated current to the solenoid valve through the commutator. The solenoid valve is started to make the lubricating oil in the oil tank flow, and finally reaches the nozzle to lubricate the cylinder in time, thereby reducing the internal parts of the cylinder from being seriously damaged due to wear, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A multi-stage piston hydraulic pulling cylinder comprises a shell, a cylinder body is fixedly mounted on the inner wall of the bottom of the shell, a limiting plate is fixedly mounted on the top of the cylinder body, a rack is fixedly mounted on one side of the cylinder body, a control panel is provided on one side of the shell, a No. 1 turning rod is rotatably mounted on the inner wall of the shell, a power generation mechanism cooperating with the rack is provided inside the shell, a liquid spray mechanism cooperating with the power generation mechanism is provided on the top of the shell, a groove is provided inside the shell, a T-shaped block is rotatably mounted inside the groove, a bevel gear cooperating with the rack is provided on one side of the T-shaped block, a first magnet is fixedly mounted on the bottom of the T-shaped block, a blowing mechanism cooperating with the first magnet is provided inside the shell, and a cleaning mechanism cooperating with the rack is provided inside the shell.

[0009] When the cylinder body is working, the hydraulic tension cylinder can be started through the control panel. At this time, the cylinder body moves with the limiting plate, and the movement of the limiting plate drives the rack to move. The teeth on the side wall of the rack are divided into two parts, one side is the conventional teeth meshing with the first gear, and the other side is the helical teeth meshing with the bevel gear. The movement of the rack drives the generator to generate current to provide power for subsequent movement. The current generated by the generator is transmitted to the solenoid valve. The solenoid valve is started to enable the spray mechanism to spray lubricating oil to lubricate the mechanical parts inside the cylinder body. At the same time, when the rack moves, the helical teeth on the other side of the rack will drive the bevel gear to rotate, and then the bevel gear will drive the T-shaped block to rotate, and then the T-shaped block drives the first magnet to rotate inside the groove. The first magnet will cooperate with the blowing mechanism to make the sprayed lubricating oil evenly and quickly enter the cylinder body for lubrication. When the cylinder body is finished working, the rack movement will drive the blowing mechanism to blow off the dust on the surface of the cylinder body. At the same time, the rack cooperates with the cleaning mechanism to discharge the blown dust out of the shell for collection.

[0010] Preferably, the power generation mechanism includes a one-way bearing fixedly mounted on the outer surface of the No. 1 rotating rod, a first gear fixedly mounted on the outer surface of the one-way bearing, a No. 2 rotating rod rotatably mounted inside the shell, a second gear meshing with the first gear rotatably mounted inside the shell, two magnets symmetrically fixedly mounted inside the shell, a coil matching the two magnets fixedly mounted outside the No. 1 rotating rod, and two commutators electrically connected to the two ends of the coil respectively fixedly mounted on one end of the No. 2 rotating rod.

[0011] When the hydraulic tension cylinder is working normally, with the cooperation of the No. 1 rotating rod and the one-way bearing, the first gear will drive the second gear to rotate on the No. 2 rotating rod, thereby driving the coil to cut the magnetic lines of force between the two magnets, and then generate current, which is then conducted through the commutator to provide power for subsequent work.

[0012] Preferably, the liquid spraying mechanism includes a connecting pipe connected to the top of the shell, the top of the connecting pipe is connected to the oil tank, an electromagnetic valve is provided on the outer surface of the connecting pipe, the electromagnetic valve is electrically connected to the control panel, and two liquid outlet pipes connected to the connecting pipe are fixedly installed on the inner side wall of the top of the shell, and one end of the two liquid outlet pipes is respectively connected to two nozzles.

[0013] When the current is transmitted to the internal circuit of the solenoid valve through the control panel, the solenoid valve starts to make the lubricating oil in the oil tank flow. The lubricating oil passes through the connecting pipe and the liquid outlet pipe in turn, and finally reaches the nozzle to lubricate the cylinder in time, reducing the internal parts of the cylinder from greater damage caused by wear.

[0014] Preferably, the blowing mechanism includes an air box fixedly installed inside the shell, two No. 2 telescopic springs are fixedly installed on the top of the air box, a slider fixedly connected to the two No. 2 telescopic springs is installed on the internal sealing sliding of the air box, a second magnet matched with the first magnet is fixedly installed on the top of the slider, a first one-way valve is arranged at the bottom of the air box, a second one-way valve is arranged at the bottom of the air box, two air outlet pipes matched with the second one-way valve are fixedly installed on the inner side wall of the top of the shell, and one end of the two air outlet pipes are respectively connected to two air outlets.

[0015] When the first magnet rotates, when it reaches the bottom, it will cooperate with the second magnet, and according to the principle that like magnets repel each other and opposite magnets attract each other, the second magnet is pushed, and then the second magnet moves with the slider, and at the same time, the No. 2 telescopic spring is stretched, squeezing the gas inside the air box through the cooperation with the second one-way valve, and the gas flow outlet pipe is used to blow the lubricating oil sprayed on the cylinder through the outlet, so that the sprayed lubricating oil enters the cylinder evenly and quickly for lubrication. When the first magnet reaches the top, with the cooperation of the second magnet and the No. 2 telescopic spring, the slider moves upward through the cooperation with the first one-way valve, and the external gas enters the air box through the first one-way valve, which can enhance the use effect of the lubricating oil, and at the same time, the dust on the cylinder is blown off when the cylinder is retracted and released.

[0016] Preferably, the cleaning mechanism includes a box body fixedly mounted inside the shell, an air inlet valve is provided on one side of the box body, a slide is sealingly and slidably connected to the inside of the box body, a connecting block slidably connected to the slide and a rack is slidingly penetrated through the top of the box body, an air outlet valve is provided at the bottom of the box body, the bottom of the box body is connected to an exhaust pipe matched with the air outlet valve, two discharge hoppers are connected to the inner side wall of the bottom of the shell body, both of the two discharge hoppers are connected to the exhaust pipe, and a collection box fixedly connected to the exhaust pipe is fixedly mounted on the side of the shell body.

[0017] When the cylinder starts to work, the rack moves upward and pulls the slide plate to move through the connecting block. By cooperating with the intake valve, external gas can enter the box. When the cylinder completes its work and is retracted or released, the rack moves downward and drives the slide plate to move downward through the connecting block to push the air flow inside the box. From Bernoulli's principle, we can see that where the flow rate is large, the pressure is small. With the cooperation of the outlet valve, the dust inside the shell is moved through the discharge hopper and the exhaust pipe, and finally reaches the collection box for collection, effectively reducing the accumulation of dust.

[0018] Preferably, the shell is made of PP material.

[0019] When the oil cylinder is working, it often produces a loud sound that affects the working environment of the staff. The PP material has a good sound reduction effect and can effectively reduce the sound generated by the oil cylinder when it is working, thereby reducing the impact of the sound on the working environment of the staff.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. When the piston of the hydraulic tension cylinder rises, the first gear drives the second gear to rotate, driving the coil to cut the magnetic flux lines between the two magnets, generating a strong current to provide power for the follow-up.

[0022] 2. When the piston of the hydraulic tension cylinder rises, the battery valve is activated by the power generation mechanism, so that the nozzle can spray lubricating oil to lubricate the cylinder in time, reducing the damage to the internal parts of the cylinder caused by wear.

[0023] 3. After the T-shaped block rotates, the first magnet cooperates with the second magnet to blow the lubricating oil sprayed from the nozzle, so that the sprayed lubricating oil evenly and quickly enters the inside of the cylinder body 2 for lubrication, further improving the lubrication effect.

[0024] 4. When the hydraulic cylinder piston contracts, the dust on the cylinder surface can be blown off, reducing the impact of dust on the cylinder working environment.

[0025] 5. When the gear block moves downward, the dust inside the shell can be cleaned and discharged, and then the dust is collected by the collection box, which effectively reduces the accumulation of dust inside the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0027] Figure 2 It is an enlarged view of the structure at A of the present invention;

[0028] Figure 3 It is a schematic diagram of the internal structure of the housing of the present invention;

[0029] Figure 4 It is a side view of the power generation mechanism of the present invention;

[0030] Figure 5 It is an enlarged view of the structure at B of the present invention;

[0031] Figure 6 It is an enlarged view of the structure at C of the present invention;

[0032] Figure 7 It is a top view of the rack structure of the present invention.

[0033] In the figure: 1, shell; 2, cylinder body; 3, limiting plate; 4, rack; 5, control panel; 6, No. 1 rotating rod; 7, one-way bearing; 8, first gear; 9, No. 2 rotating rod; 10, second gear; 11, magnet; 12, coil; 13, commutator; 14, connecting pipe; 15, oil tank; 16, solenoid valve; 17, liquid outlet pipe; 18, nozzle; 19, groove; 20, T-block; 21, bevel gear; 22, first magnet; 23, air box; 24, No. 2 telescopic spring; 25, slider; 26, second magnet; 27, first one-way valve; 28, second one-way valve; 29, outlet pipe; 30, outlet; 31, box; 32, inlet valve; 33, slide plate; 34, connecting block; 35, outlet valve; 36, exhaust pipe; 37, discharge hopper; 38, collection box. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] See also Figure 1-7 The present invention provides a multi-stage piston hydraulic tension cylinder, and the technical solution is as follows:

[0038] A multi-stage piston hydraulic tension cylinder comprises a shell 1, a cylinder body 2 is fixedly mounted on the inner wall at the bottom of the shell 1, a limiting plate 3 is fixedly mounted on the top of the cylinder body 2, a rack 4 is fixedly mounted on one side of the cylinder body 2, a control panel 5 is provided on one side of the shell 1, a No. 1 turning rod 6 is rotatably mounted on the inner wall of the shell 1, a power generation mechanism cooperating with the rack 4 is provided inside the shell 1, a liquid spraying mechanism cooperating with the power generation mechanism is provided on the top of the shell 1, a groove 19 is opened inside the shell 1, a T-shaped block 20 is rotatably mounted inside the groove 19, a bevel gear 21 cooperating with the rack 4 is provided on one side of the T-shaped block 20, a first magnet 22 is fixedly mounted on the bottom of the T-shaped block 20, a blowing mechanism cooperating with the first magnet 22 is provided inside the shell 1, and a cleaning mechanism cooperating with the rack 4 is provided inside the shell 1.

[0039] When the cylinder body 2 is working, the cylinder body 2 moves with the limiting plate 3, and the movement of the limiting plate 3 drives the rack 4 to move. The teeth of the side wall of the rack 4 are divided into two parts, one side is the conventional teeth meshing with the first gear 8, and the other side is the helical teeth meshing with the bevel gear 21. The movement of the rack 4 drives the power generation mechanism to generate current to provide power for subsequent movement. The current generated by the power generation mechanism is transmitted to the solenoid valve 16. The solenoid valve 16 is started to enable the liquid spraying mechanism to spray lubricating oil to lubricate the mechanical parts inside the cylinder body 2. At the same time, the rack 4 is When moving, the helical teeth on the other side of the rack 4 will drive the bevel gear 21 to rotate, and then the bevel gear 21 will drive the T-shaped block 20 to rotate, and then the T-shaped block 20 will drive the first magnet 22 to rotate inside the groove 19, and the first magnet 22 will cooperate with the blowing mechanism to allow the sprayed lubricating oil to enter the cylinder body 2 evenly and quickly for lubrication. When the cylinder body 2 completes the work, the movement of the rack 4 will drive the blowing mechanism to blow off the dust on the surface of the cylinder body 2, and at the same time, the rack 4 cooperates with the cleaning mechanism to discharge the blown dust out of the shell 1 for collection.

[0040] As an embodiment of the present invention, refer to Figure 3 to Figure 4 The power generation mechanism includes a one-way bearing 7 fixedly mounted on the outer surface of the first rotating rod 6, a first gear 8 fixedly mounted on the outer surface of the one-way bearing 7, a second rotating rod 9 rotatably mounted inside the housing 1, a second gear 10 meshing with the first gear 8 rotatably mounted inside the housing 1, two magnets 11 symmetrically fixedly mounted inside the housing 1, a coil 12 matched with the two magnets 11 fixedly mounted outside the first rotating rod 6, and two commutators 13 electrically connected to the two ends of the coil 12 are also fixedly mounted at one end of the second rotating rod 9.

[0041] When the hydraulic tension cylinder works normally, with the cooperation of the No. 1 rotating rod 6 and the one-way bearing 7, the first gear 8 will drive the second gear 10 to rotate on the No. 2 rotating rod 9, thereby driving the coil 12 to cut the magnetic flux lines between the two magnets 11, and then generate current, which is then conducted through the commutator 13 to provide power for subsequent work.

[0042] As an embodiment of the present invention, refer to Figure 1-3 The liquid spraying mechanism includes a connecting pipe 14 connected to the top of the shell 1, the top of the connecting pipe 14 is connected to the oil tank 15, an electromagnetic valve 16 is provided on the outer surface of the connecting pipe 14, and the electromagnetic valve 16 is electrically connected to the control panel 5. Two liquid outlet pipes 17 connected to the connecting pipe 14 are fixedly installed on the inner side wall of the top of the shell 1, and one end of the two liquid outlet pipes 17 is respectively connected to two nozzles 18.

[0043] When the current is transmitted to the internal circuit of the solenoid valve 16 through the control panel 5, the solenoid valve 16 starts to make the lubricating oil in the oil tank 15 flow. The lubricating oil passes through the connecting pipe 14 and the liquid outlet pipe 17 in turn, and finally reaches the nozzle 18 to lubricate the oil cylinder in time, thereby avoiding serious damage to the internal components of the oil cylinder due to wear.

[0044] As an embodiment of the present invention, refer to Figure 3 The blowing mechanism includes an air box 23 fixedly installed inside the shell 1, two No. 2 telescopic springs 24 are fixedly installed on the top of the air box 23, a slider 25 fixedly connected to the two No. 2 telescopic springs 24 is installed in the internal sealing sliding of the air box 23, a second magnet 26 matched with the first magnet 22 is fixedly installed on the top of the slider 25, a first one-way valve 27 is arranged at the bottom of the air box 23, a second one-way valve 28 is arranged at the bottom of the air box 23, two air outlet pipes 29 matched with the second one-way valve 28 are fixedly installed on the inner side wall of the top of the shell 1, and one end of the two air outlet pipes 29 are respectively connected to two air outlets 30.

[0045] When the first magnet 22 rotates, when the first magnet 22 reaches the bottom, it will cooperate with the second magnet 26. According to the principle that like magnets repel each other and opposite magnets attract each other, the second magnet 26 is pushed, and then the second magnet 26 moves with the slider 25, and at the same time, the No. 2 telescopic spring 24 is stretched, squeezing the gas inside the air box 23 through the cooperation with the second one-way valve 28, and the gas flow outlet pipe 29 is blown to the outlet 30 to the lubricating oil sprayed on the cylinder, so that the sprayed lubricating oil enters the cylinder evenly and quickly for lubrication. When the first magnet 22 reaches the top, with the cooperation of the second magnet 26 and the No. 2 telescopic spring 24, the slider 25 moves upward through the cooperation with the first one-way valve 27, and the external gas enters the air box 23 through the first one-way valve 27, which can enhance the use effect of the lubricating oil, and at the same time, the dust on the cylinder is blown off when the cylinder is retracted or released.

[0046] As an embodiment of the present invention, refer to Figure 1 , Figure 3 as well as Figure 6 The cleaning mechanism includes a box body 31 fixedly installed inside the shell 1, an air inlet valve 32 is provided on one side of the box body 31, a slide plate 33 is sealingly and slidably connected inside the box body 31, a connecting block 34 fixedly connected to the slide plate 33 and the rack 4 is slidably connected through the top of the box body 31, an air outlet valve 35 is provided at the bottom of the box body 31, and an exhaust pipe 36 matched with the air outlet valve 35 is connected to the bottom of the box body 31. Two discharge hoppers 37 are connected to the inner side wall of the bottom of the shell 1, and the two discharge hoppers 37 are connected to the exhaust pipe 36. A collecting box 38 fixedly connected to the exhaust pipe 36 is fixedly installed on the side of the shell 1.

[0047] When the cylinder starts to work, the rack 4 moves upward and pulls the slide plate 33 to move through the connecting block 34. By cooperating with the air inlet valve 32, external gas can enter the box body 31. When the cylinder completes its work and is retracted, the rack 4 moves downward and drives the slide plate 33 to move downward through the connecting block 34 to push the air flow inside the box body 31. From Bernoulli's principle, it can be seen that the pressure is small where the flow rate is large. Under the cooperation with the air outlet valve 35, the dust inside the shell 1 is moved through the discharge hopper 37 and the exhaust pipe 36, and finally reaches the collection box 38 for collection, which effectively reduces the accumulation of dust.

[0048] As an embodiment of the present invention, refer to Figure 3 The material of the shell 1 is PP material.

[0049] When the oil cylinder is working, it often produces a loud noise that affects the working environment of the staff. The PP material has a good sound reduction effect and can effectively reduce the noise generated by the oil cylinder when working, thereby reducing the impact of the sound on the working environment of the staff.

[0050] Working principle: The hydraulic tension cylinder is started to work through the control panel 5. At this time, the cylinder body 2 moves with the limiting plate 3, and then the limiting plate 3 moves to drive the rack 4 to move. The rack 4 moves to drive the first gear 8 to rotate. Under the cooperation of the No. 1 rotating rod 6 and the one-way bearing 7, the first gear 8 will drive the second gear 10 to rotate on the No. 2 rotating rod 9, and then drive the coil 12 to cut the magnetic flux lines between the two magnets 11, and then generate current, and then transmit the generated current to the solenoid valve 16 through the commutator 13. The solenoid valve 16 starts to pump the lubricating oil in the oil tank 15 into the oil tank 15. The lubricating oil flows through the connecting pipe 14 and the liquid outlet pipe 17 in sequence, and finally reaches the nozzle 18 to lubricate the oil cylinder in time, thereby reducing the damage to the components inside the oil cylinder caused by wear. At the same time, when the rack 4 moves, the helical teeth on one side of the rack 4 will drive the bevel gear 21 to rotate, and then the bevel gear 21 will drive the T-shaped block 20 to rotate, and then the T-shaped block 20 will drive the first magnet 22 to rotate inside the groove 19. When the first magnet 22 reaches the bottom, it will cooperate with the second magnet 26. According to the principle that like magnets repel each other and opposite magnets attract each other, the second magnet 26 is pushed, and then the second magnet 26 moves with the slider 25, and at the same time stretches the second telescopic spring 24, squeezes the gas inside the air box 23 and cooperates with the second one-way valve 28, so that the gas flows through the air outlet pipe 29 to the air outlet 30 to blow the lubricating oil sprayed on the oil cylinder, so that the sprayed lubricating oil enters the oil cylinder evenly and quickly for lubrication. When the first magnet 22 reaches the top, under the cooperation of the second magnet 26 and the second telescopic spring 24, the slider 25 moves upward and cooperates with the first one-way valve 27, so that the external gas enters the air box 23 through the first one-way valve 27, and the gas inside the air box 23 The oil cylinder 1 is replenished and reciprocates in this way. When the oil cylinder completes its work and starts to shrink, according to the cooperation of the one-way bearing 7, the nozzle 18 will not work, and the air outlet 30 blows air under the cooperation of the bevel gear 21, the first one-way valve 27 and the second one-way valve 28 to blow off the dust on the oil cylinder. At the same time, the rack 4 moves downward and drives the slide plate 33 to move downward through the connecting block 34 to push the air flow inside the box body 31. Under the cooperation of the air outlet valve 35, the dust inside the shell 1 is moved through the discharge hopper 37 and the exhaust pipe 36, and finally reaches the collection box 38 for collection, which effectively reduces the accumulation of dust.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage piston hydraulic tension cylinder, comprising a housing (1), characterized in that: The inner wall at the bottom of the shell (1) is fixedly mounted with a cylinder body (2), the top of the cylinder body (2) is fixedly mounted with a limiting plate (3), one side of the cylinder body (2) is fixedly mounted with a rack (4), one side of the shell (1) is provided with a control panel (5), a No. 1 turning rod (6) is rotatably mounted on the inner wall of the shell (1), a power generation mechanism cooperating with the rack (4) is provided inside the shell (1), a liquid spraying mechanism cooperating with the power generation mechanism is provided on the top of the shell (1), a groove (19) is provided inside the shell (1), a T-shaped block (20) is rotatably mounted inside the groove (19), one side of the T-shaped block (20) is provided with a bevel gear (21) cooperating with the rack (4), a first magnet (22) is fixedly mounted on the bottom of the T-shaped block (20), a blowing mechanism cooperating with the first magnet (22) is provided inside the shell (1), and a cleaning mechanism cooperating with the rack (4) is provided inside the shell (1); The power generation mechanism comprises a first gear (8) fixedly mounted on the outer surface of a first rotating rod (6); a second rotating rod (9) is rotatably mounted inside the housing (1); a second gear (10) meshing with the first gear (8) is rotatably mounted inside the housing (1); two magnets (11) are symmetrically fixedly mounted inside the housing (1); a coil (12) matched with the two magnets (11) is fixedly mounted outside the second rotating rod (9); and two commutators (13) electrically connected to the two ends of the coil (12) are also fixedly mounted at one end of the second rotating rod (9); The liquid spraying mechanism comprises a connecting pipe (14) connected to the top of the housing (1), the top of the connecting pipe (14) is connected to an oil tank (15), an electromagnetic valve (16) is provided on the outer surface of the connecting pipe (14), the electromagnetic valve (16) is electrically connected to the control panel (5), and two liquid outlet pipes (17) connected to the connecting pipe (14) are fixedly mounted on the inner side wall of the top of the housing (1), and one end of the two liquid outlet pipes (17) is respectively connected to two spray heads (18); The blowing mechanism comprises an air box (23) fixedly mounted inside the shell (1), two No. 2 telescopic springs (24) fixedly mounted on the top of the air box (23), a slider (25) fixedly connected to the two No. 2 telescopic springs (24) sealed and slidably mounted inside the air box (23), a second magnet (26) matched with the first magnet (22) fixedly mounted on the top of the slider (25), a first one-way valve (27) disposed at the bottom of the air box (23), a second one-way valve (28) disposed at the bottom of the air box (23), two air outlet pipes (29) matched with the second one-way valve (28) fixedly mounted on the inner side wall at the top of the shell (1), one end of the two air outlet pipes (29) are respectively connected with two air outlets (30); The cleaning mechanism comprises a box body (31) fixedly mounted inside the shell (1); an air inlet valve (32) is provided on one side of the box body (31); a slide plate (33) is sealingly and slidably connected inside the box body (31); a connecting block (34) fixedly connected to the slide plate (33) and the rack (4) is slidably connected through the top of the box body (31); an air outlet valve (35) is provided at the bottom of the box body (31); an exhaust pipe (36) matched with the air outlet valve (35) is connected to the bottom of the box body (31); two discharge hoppers (37) are connected to the inner side wall of the bottom of the shell (1); the two discharge hoppers (37) are both connected to the exhaust pipe (36); and a collection box (38) fixedly mounted on the side of the shell (1) and connected to the exhaust pipe (36) is fixedly mounted.

2. The multi-stage piston hydraulic tension cylinder according to claim 1, characterized in that: The shell (1) is made of PP material.

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