Electric control hydraulic cylinder for high-altitude elevator

Abstract

The invention belongs to the technical field of hydraulic cylinders, and particularly discloses an electric control hydraulic cylinder used for a high-altitude elevator, the electric control hydraulic cylinder comprises a shell, a driving cavity is formed in the shell, a sliding block is slidably connected to the interior of the driving cavity, and a push rod is fixedly connected to one side of the sliding block; by arranging the locking assembly, a check block, a first spring, a flow guide hole, a connecting hole and a butt joint hole can be matched with one another, it is guaranteed that hydraulic oil in the driving cavity cannot flow by blocking communication of the connecting hole and the butt joint hole after the push rod moves in place, and therefore the effect of stabilizing the position of the push rod is achieved; in the process, an extrusion plate can extrude hydraulic oil stored in a connecting shell, the extruded hydraulic oil can be injected into an adjusting cavity through a connecting channel and a flow guide pipe, then a locking rod can be pushed to stretch out of the interior of a fixing shell and be inserted into an adjacent locking groove, and then the mechanical locking effect is achieved; and the locking effect on the position of the push rod is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic cylinders, and specifically discloses an electric-controlled hydraulic cylinder used in an aerial lift. Background Art

[0002] The aerial lift mainly realizes the lifting function through the pressure transmission of hydraulic oil. Its scissor-type mechanical structure makes the lift have higher stability. The wide working platform and high load-bearing capacity make the aerial work range larger and suitable for multiple people to work at the same time. It makes aerial work more efficient and safer. Its drive is mainly achieved by the extension and retraction of the piston push rod of the electric hydraulic cylinder. However, as the load on the working platform of the lift increases, the force generated by the traditional electric hydraulic cylinder will be transmitted to the piston push rod, causing the piston push rod to partially retreat, which poses a great safety hazard. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide an electronically controlled hydraulic cylinder for use in aerial lifts to solve the problem of safety hazards caused by partial retreat of the piston push rod when the load is large in the prior art.

[0004] To achieve the above purpose, the present invention provides an electric-controlled hydraulic cylinder for aerial lifts, comprising a shell, a driving chamber is provided inside the shell, a slider is slidably connected inside the driving chamber, a push rod is fixedly connected to one side of the slider, the other end of the push rod passes through the shell, two symmetrically distributed connecting holes are provided on the surface of the shell, a locking assembly is provided on the top of the shell, a cleaning assembly for cleaning the surface of the push rod is provided on one side of the shell, and two symmetrically distributed first sealing rings are embedded and installed on the surface of the slider; The locking assembly comprises two sets of symmetrically distributed locking grooves opened on the inner wall of the driving cavity, an installation cavity is opened in the middle of the slider, and a locking rod assembly is arranged inside the installation cavity for cooperating with the locking groove to lock and limit the slider.

[0005] In the above technical solution, preferably, the locking assembly also includes two mounting shells which are fixedly connected to the top of the outer shell and are symmetrically distributed, the mounting shells are connected to the adjacent connecting holes, a block is slidably connected to the inner wall of the mounting shell, a first spring is fixedly connected between the bottom of the block and the top of the outer shell, a connecting channel is provided on the surface of the block, a docking hole is provided on one side of the mounting shell, the block blocks the docking hole, and a guide hole is provided on the surface of the block.

[0006] In the above technical solution, preferably, two groups of electromagnets are embedded and installed on the top of the shell and are respectively located on the inner sides of two installation shells, and the stopper is a nickel-based alloy material component.

[0007] In the above technical solution, preferably, the top of the mounting shell is fixedly connected to a connecting shell, the inner wall of the connecting shell is slidably connected to an extrusion plate, hydraulic oil is filled between the top of the extrusion plate and the interior of the connecting shell, the bottom of the extrusion plate is fixedly connected to a connecting column, the lower end of the connecting column sequentially passes through the connecting shell and the mounting shell and is fixedly connected to the top of the block.

[0008] In the above technical solution, preferably, a connecting cavity is provided at the bottom of the block, a guide tube is provided inside the connecting cavity, and a connecting channel connected to the guide tube is provided between the extrusion plate, the connecting column and the inside of the block.

[0009] In the above technical solution, preferably, the locking rod assembly includes two fixed shells fixedly connected to the inner wall of the installation cavity and symmetrically distributed, the surface of the installation cavity is provided with an installation groove connected to the fixed shell, the inner wall of the installation groove is slidably connected with a locking rod, the other end of the locking rod passes through the fixed shell and extends to the interior of the adjacent locking groove, and a second spring is fixedly connected between the surface of the locking rod and the inner wall of the fixed shell.

[0010] In the above technical solution, preferably, an adjustment cavity is formed between the bottom of the locking rod and the inner wall of the mounting groove, and the other end of the guide tube is connected to the adjacent adjustment cavity.

[0011] In the above technical solution, preferably, the cleaning assembly includes a mounting block fixedly connected to one side of the outer shell, a second sealing ring is embedded and installed on the inner side of the mounting block, the push rod passes through the mounting block, and a removable first cleaning ring is embedded and installed on the side of the mounting block away from the outer shell.

[0012] In the above technical solution, preferably, two symmetrically distributed docking blocks are provided on the side of the mounting block away from the outer shell, two symmetrically distributed mounting plates are fixedly connected to the surface of the docking block, and a second cleaning ring is embedded and installed on the inner side of the docking block, and the second cleaning ring is a water-absorbent cotton material component.

[0013] In the above technical solution, preferably, a liquid storage cavity is opened inside the docking block, a flow channel is opened on the inner wall of the liquid storage cavity, an injection hole is opened on the surface of the docking block, and a detachable blocking rod is provided on the inner wall of the injection hole.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By setting up the locking assembly, the mutual cooperation of the block, the first spring, the guide hole, the connecting hole and the docking hole can be utilized. After the push rod moves into place, the connection between the connecting hole and the docking hole is blocked to ensure that the hydraulic oil in the driving cavity cannot flow, thereby achieving the effect of stabilizing the position of the push rod. In this process, the extrusion plate can squeeze the hydraulic oil stored in the connecting shell. The squeezed hydraulic oil can be injected into the adjusting chamber through the connecting channel and the guide tube, and then the locking rod can be pushed out from the inside of the fixed shell and inserted into the inside of the adjacent lock groove, thereby achieving the effect of mechanical locking, and further improving the locking effect of the push rod position.

[0015] During the process of pushing rod recovery, it can contact with the surface of the second cleaning ring. By injecting clean water into the liquid storage chamber, the second cleaning ring can be infiltrated through the flow channel, thereby improving the cleaning effect on the push rod surface and reducing the dust adhered to the extended part of the push rod from being brought into the driving chamber. The second cleaning ring is provided to reduce the adhesion of dust into the driving chamber, thereby increasing the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a cross-sectional schematic diagram of the present invention; Figure 3 for Figure 2 A magnified view of middle; Figure 4 It is a schematic diagram of the distribution of the installation shell, the connection shell and the outer shell of the present invention; Figure 5 It is a schematic diagram of the connection of the extruded plate, the connecting column and the stopper of the present invention; Figure 6 It is a schematic diagram of the connection between the fixed shell and the locking rod of the present invention; Figure 7 It is a schematic diagram of the structure of the cleaning component of the present invention.

[0017] In the figure: 1. shell; 101. push rod; 102. connecting hole; 103. driving chamber; 104. slider; 105. first sealing ring; 2. locking assembly; 201. locking groove; 202. mounting shell; 203. docking hole; 204. stopper; 205. first spring; 206. electromagnet; 207. connecting shell; 208. guide tube; 209. guide hole; 210. connecting channel; 211. connecting column; 212. extrusion plate; 213. fixing shell; 214. locking rod; 215. second spring; 3. cleaning assembly; 301. mounting block; 302. second sealing ring; 303. first cleaning ring; 304. docking block; 305. second cleaning ring; 306. mounting plate; 307. flow channel; 308. liquid storage chamber; 309. blocking rod. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] like Figure 1-Figure 7 An electric-controlled hydraulic cylinder used in an aerial lift shown in the figure comprises a housing 1, a driving chamber 103 is provided inside the housing 1, a slider 104 is slidably connected inside the driving chamber 103, a push rod 101 is fixedly connected to one side of the slider 104, the other end of the push rod 101 passes through the housing 1, two symmetrically distributed connecting holes 102 are provided on the surface of the housing 1, a locking assembly 2 is provided on the top of the housing 1, a cleaning assembly 3 for cleaning the surface of the push rod 101 is provided on one side of the housing 1, and two symmetrically distributed first sealing rings 105 are embedded and installed on the surface of the slider 104; Among them, the locking assembly 2 includes two groups of locking grooves 201 opened on the inner wall of the driving cavity 103 and symmetrically distributed. An installation cavity is opened in the middle of the slider 104, and a locking rod assembly is arranged inside the installation cavity for cooperating with the locking grooves 201 to lock and limit the slider 104.

[0021] By injecting hydraulic oil into different connecting holes 102 , the slider 104 can be made to slide left and right, thereby driving the push rod 101 to move.

[0022] like Figure 1-Figure 5 As shown, the locking assembly 2 also includes two mounting shells 202 which are fixedly connected to the top of the outer shell 1 and are symmetrically distributed. The mounting shells 202 are connected to adjacent connecting holes 102. A stopper 204 is slidably connected to the inner wall of the mounting shell 202. A first spring 205 is fixedly connected between the bottom of the stopper 204 and the top of the outer shell 1. A connecting channel 210 is provided on the surface of the stopper 204. A docking hole 203 is provided on one side of the mounting shell 202. The stopper 204 blocks the docking hole 203. A guide hole 209 is provided on the surface of the stopper 204.

[0023] Two groups of electromagnets 206 are embedded and installed on the top of the housing 1 and are located inside the two mounting shells 202 respectively. The stopper 204 is a component made of nickel-based alloy material.

[0024] The top of the mounting shell 202 is fixedly connected to the connecting shell 207, the inner wall of the connecting shell 207 is slidably connected to the extrusion plate 212, the top of the extrusion plate 212 and the inside of the connecting shell 207 are filled with hydraulic oil, the bottom of the extrusion plate 212 is fixedly connected to the connecting column 211, the lower end of the connecting column 211 passes through the connecting shell 207 and the mounting shell 202 in sequence and is fixedly connected to the top of the stop block 204.

[0025] A connecting cavity is provided at the bottom of the stopper 204 , a flow guide tube 208 is provided inside the connecting cavity, and a connecting channel 210 connected to the flow guide tube 208 is provided between the extrusion plate 212 , the connecting column 211 and the inside of the stopper 204 .

[0026] The locking rod assembly includes two fixed shells 213 fixedly connected to the inner wall of the installation cavity and symmetrically distributed. The surface of the installation cavity is provided with an installation groove connected to the fixed shell 213. The inner wall of the installation groove is slidably connected with a locking rod 214. The other end of the locking rod 214 passes through the fixed shell 213 and extends to the interior of the adjacent locking groove 201. A second spring 215 is fixedly connected between the surface of the locking rod 214 and the inner wall of the fixed shell 213.

[0027] An adjustment cavity is formed between the bottom of the locking rod 214 and the inner wall of the mounting groove, and the other end of the flow guide tube 208 is connected to the adjacent adjustment cavity.

[0028] The load applied during the use of the lift is transmitted to the slider 104 through the push rod 101, which will squeeze the hydraulic oil stored in the drive chamber 103, so that part of the hydraulic oil will be guided back to the hydraulic station through the injection channel, causing a small part of the push rod 101 to retreat, posing a great safety hazard. Therefore, a locking assembly 2 is provided, and under normal circumstances, the electromagnet 206 is not energized and does not generate magnetic force, so that the block 204 can be driven to be tightly attached to the inner wall of the mounting shell 202 under the action of the first spring 205. At this time, the inner top wall of the mounting shell 202 blocks the guide hole 209, and the block 204 blocks the docking hole 203. At this time, the hydraulic oil in the drive chamber 103 cannot flow from the connecting hole 102, thereby ensuring the stability of the hydraulic oil in the drive chamber 103, ensuring that the position of the slider 104 will not change, and realizing hydraulic self-locking of the push rod 101, thereby ensuring the stability of the lift.

[0029] When the position of the push rod 101 needs to be adjusted, the electromagnet 206 can be started to generate magnetic force to attract the stopper 204 of the nickel-based alloy material component. In this process, the first spring 205 can be squeezed. In this process, the top of the stopper 204 is separated from the inner bottom wall of the mounting shell 202. At this time, the hydraulic oil can flow through the guide hole 209, so that it can flow through the connecting hole 102 and the docking hole 203. At this time, the position of the push rod 101 can be adjusted. When the adjustment is completed, the electromagnet 206 is powered off to stop the adsorption of the stopper 204. Then, under the action of the first spring 205, the stopper 204 can be driven to reset, thereby realizing the self-locking of the push rod 101. In this process, the stopper 204 can drive the connecting column 211 and the extrusion plate 212 to reset. 12 can squeeze the hydraulic oil stored in the connecting shell 207, and the squeezed hydraulic oil can be injected into the adjusting chamber through the connecting channel 210 and the guide tube 208, so as to push the locking rod 214 to extend from the inside of the fixed shell 213 and insert into the inside of the adjacent locking groove 201, so as to achieve the effect of mechanical locking and improve the limiting effect of the push rod 101. When the electromagnet 206 absorbs the block 204, the squeezing plate 212 moves down synchronously, and the space between the top of the squeezing plate 212 and the inside of the connecting shell 207 is increased. At this time, the locking rod 214 can be driven to reset under the action of the second spring 215 and squeeze the hydraulic oil stored in the adjusting chamber to be guided back to the internal storage of the connecting shell 207 through the guide tube 208 and the connecting channel 210 for reuse.

[0030] like Figure 1-Figure 5 As shown, the cleaning assembly 3 includes a mounting block 301 fixedly connected to one side of the outer shell 1, a second sealing ring 302 is embedded and installed on the inner side of the mounting block 301, the push rod 101 passes through the mounting block 301, and a detachable first cleaning ring 303 is embedded and installed on the side of the mounting block 301 away from the outer shell 1.

[0031] Two symmetrically distributed docking blocks 304 are arranged on one side of the mounting block 301 away from the housing 1, two symmetrically distributed mounting plates 306 are fixedly connected to the surface of the docking block 304, and a second cleaning ring 305 is embedded and installed on the inner side of the docking block 304, and the second cleaning ring 305 is a component made of absorbent cotton material.

[0032] A liquid storage cavity 308 is provided inside the docking block 304, a flow channel 307 is provided on the inner wall of the liquid storage cavity 308, an injection hole is provided on the surface of the docking block 304, and a detachable blocking rod 309 is provided on the inner wall of the injection hole. The blocking rod 309 is screwed.

[0033] During the recovery process of the push rod 101, it can contact the surface of the second cleaning ring 305. By injecting clean water into the liquid storage chamber 308, the second cleaning ring 305 can be infiltrated through the flow channel 307, thereby improving the cleaning effect on the surface of the push rod 101 and reducing the dust adhered to the extended part of the push rod 101 from being brought into the drive chamber 103. The second cleaning ring 305 is configured to reduce the adhesion of dust into the drive chamber 103. The configuration of the first cleaning ring 303 can reduce the adhesion of clean water on the surface of the push rod 101 from entering the drive chamber 103, thereby effectively increasing the service life of the device.

[0034] Working principle: When the position of the push rod 101 needs to be adjusted, the electromagnet 206 can be started to generate magnetic force to attract the block 204 of the nickel-based alloy material component. In this process, the first spring 205 can be squeezed. In this process, the top of the block 204 is separated from the inner bottom wall of the mounting shell 202. At this time, the hydraulic oil can flow through the guide hole 209, and then flow through the connecting hole 102 and the docking hole 203. At this time, the position of the push rod 101 can be adjusted. When the adjustment is completed, the electromagnet 206 is powered off to stop the adsorption of the block 204. Then, the block 204 can be driven to reset under the action of the first spring 205, thereby realizing the self-locking of the push rod 101. In this process, the block 204 can drive the connecting column 211 and the extrusion plate 212 to reset, squeezing The pressure plate 212 can squeeze the hydraulic oil stored in the connecting shell 207. The squeezed hydraulic oil can be injected into the adjusting chamber through the connecting channel 210 and the guide tube 208, and then can push the locking rod 214 to extend from the inside of the fixed shell 213 and insert into the inside of the adjacent lock groove 201, thereby achieving the effect of mechanical locking and improving the limiting effect of the push rod 101. When the electromagnet 206 absorbs the block 204, the squeezing plate 212 moves down synchronously, and the space between the top of the squeezing plate 212 and the inside of the connecting shell 207 is increased. At this time, the locking rod 214 can be driven to reset under the action of the second spring 215 and squeeze the hydraulic oil stored in the adjusting chamber through the guide tube 208 and the connecting channel 210 to guide it back to the internal storage of the connecting shell 207 for reuse.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An electrically controlled hydraulic cylinder for use in an aerial lift, comprising a housing (1), characterized in that: A driving cavity (103) is provided inside the housing (1), a slider (104) is slidably connected inside the driving cavity (103), a push rod (101) is fixedly connected to one side of the slider (104), the other end of the push rod (101) passes through the housing (1), two symmetrically distributed connecting holes (102) are provided on the surface of the housing (1), a locking assembly (2) is provided on the top of the housing (1), a cleaning assembly (3) for cleaning the surface of the push rod (101) is provided on one side of the housing (1), and two symmetrically distributed first sealing rings (105) are embedded and installed on the surface of the slider (104); The locking assembly (2) comprises two groups of symmetrically distributed locking grooves (201) formed on the inner wall of the driving cavity (103), a mounting cavity is formed in the middle of the slider (104), and a locking rod assembly is provided inside the mounting cavity for cooperating with the locking grooves (201) to lock and limit the slider (104).

2. The electronically controlled hydraulic cylinder used in an aerial lift according to claim 1, characterized in that: The locking assembly (2) further comprises two mounting shells (202) which are both fixedly connected to the top of the outer shell (1) and are symmetrically distributed; the mounting shells (202) are connected to adjacent connecting holes (102); a stopper (204) is slidably connected to the inner wall of the mounting shell (202); a first spring (205) is fixedly connected between the bottom of the stopper (204) and the top of the outer shell (1); a connecting channel (210) is provided on the surface of the stopper (204); a docking hole (203) is provided on one side of the mounting shell (202); the stopper (204) blocks the docking hole (203); and a guide hole (209) is provided on the surface of the stopper (204).

3. The electronically controlled hydraulic cylinder used in an aerial lift according to claim 2, characterized in that: Two groups of electromagnets (206) are embedded and installed on the top of the shell (1) and are located inside two installation shells (202) respectively. The stopper (204) is a component made of nickel-based alloy material.

4. The electronically controlled hydraulic cylinder used in an aerial lift according to claim 3, characterized in that: The top of the mounting shell (202) is fixedly connected to a connecting shell (207), the inner wall of the connecting shell (207) is slidably connected to an extrusion plate (212), the space between the top of the extrusion plate (212) and the interior of the connecting shell (207) is filled with hydraulic oil, the bottom of the extrusion plate (212) is fixedly connected to a connecting column (211), the lower end of the connecting column (211) passes through the connecting shell (207) and the mounting shell (202) in sequence and is fixedly connected to the top of the stopper (204).

5. The electronically controlled hydraulic cylinder used in an aerial lift according to claim 4, characterized in that: A connecting cavity is provided at the bottom of the stopper (204), a flow guide tube (208) is provided inside the connecting cavity, and a connecting channel (210) connected to the flow guide tube (208) is provided between the extrusion plate (212), the connecting column (211) and the inside of the stopper (204).

6. The electronically controlled hydraulic cylinder used in an aerial lift according to claim 5, characterized in that: The locking rod assembly comprises two fixed shells (213) fixedly connected to the inner wall of the installation cavity and symmetrically distributed, the surface of the installation cavity is provided with a mounting groove connected to the fixed shell (213), the inner wall of the installation groove is slidably connected with a locking rod (214), the other end of the locking rod (214) passes through the fixed shell (213) and extends to the inside of the adjacent locking groove (201), and a second spring (215) is fixedly connected between the surface of the locking rod (214) and the inner wall of the fixed shell (213).

7. The electronically controlled hydraulic cylinder used in an aerial lift according to claim 6, characterized in that: An adjustment cavity is formed between the bottom of the locking rod (214) and the inner wall of the installation groove, and the other end of the guide tube (208) is in communication with the adjacent adjustment cavity.

8. The electronically controlled hydraulic cylinder used in an aerial lift according to claim 1, characterized in that: The cleaning assembly (3) comprises a mounting block (301) fixedly connected to one side of the housing (1), a second sealing ring (302) being embedded and installed on the inner side of the mounting block (301), the push rod (101) passing through the mounting block (301), and a detachable first cleaning ring (303) being embedded and installed on a side of the mounting block (301) away from the housing (1).

9. The electronically controlled hydraulic cylinder used in an aerial lift according to claim 8, characterized in that: Two symmetrically distributed docking blocks (304) are arranged on one side of the mounting block (301) away from the housing (1); two symmetrically distributed mounting plates (306) are fixedly connected to the surface of the docking block (304); a second cleaning ring (305) is embedded and installed on the inner side of the docking block (304); the second cleaning ring (305) is a water-absorbing cotton material component.

10. The electronically controlled hydraulic cylinder used in an aerial lift according to claim 9, characterized in that: A liquid storage cavity (308) is provided inside the docking block (304), a flow channel (307) is provided on the inner wall of the liquid storage cavity (308), an injection hole is provided on the surface of the docking block (304), and a detachable blocking rod (309) is provided on the inner wall of the injection hole.

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