An electro-hydraulic cylinder for use in an aerial lift

Abstract

The present invention belongs to the technical field of hydraulic cylinders, and specifically discloses an electronically controlled hydraulic cylinder for an aerial lift, which includes a housing. A drive cavity is provided inside the housing, and a slider is slidably connected inside the drive cavity. One side of the slider is fixedly connected with a push rod; by setting a locking assembly, the mutual cooperation of the stopper, the first spring, the diversion hole, the connection hole and the docking hole can be utilized. After the push rod moves in place, the communication between the connection hole and the docking hole is blocked, ensuring that the hydraulic oil in the drive cavity cannot flow, thereby achieving the effect of stabilizing the position of the push rod. And during this process, the extrusion plate can extrude the hydraulic oil stored inside the connection shell, and the pressurized hydraulic oil can be injected into the inside of the adjustment cavity through the connection channel and the diversion pipe. Furthermore, it can push the locking rod to extend out of the inside of the fixed shell and insert into the inside of the adjacent locking groove, thereby realizing the effect of mechanical locking, and further improving the locking effect on the position of the push rod.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic cylinders, and specifically discloses an electric control hydraulic cylinder for an aerial lift. Background Art

[0002] An aerial lift mainly realizes the lifting function through the pressure transmission of hydraulic oil. Its scissor mechanical structure enables the lift to have high stability during lifting. The wide working platform and high load-bearing capacity allow for a larger aerial working range and are suitable for multiple people to work simultaneously. It makes the aerial work more efficient and safer. Its drive mainly utilizes the telescopic movement of the piston push rod of the electric control hydraulic cylinder. However, with the increase in the load on the working platform of the lift, the force generated by the traditional electric control hydraulic cylinder will be transmitted to the piston push rod, causing partial retraction of the piston push rod, posing a relatively large safety hazard. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to propose an electric control hydraulic cylinder for an aerial lift to solve the problem of potential safety hazards caused by partial retraction of the piston push rod when the load in the prior art is relatively large.

[0004] To achieve the above object, the present invention provides an electric control hydraulic cylinder for an aerial lift, including a housing. A drive cavity is opened inside the housing. A slider is slidably connected inside the drive cavity. One side of the slider is fixedly connected to a push rod, and the other end of the push rod penetrates out of the housing. Two connection holes are symmetrically distributed on the surface of the housing. A locking assembly is arranged at the top of the housing. A cleaning assembly for cleaning the surface of the push rod is arranged on one side of the housing. Two first sealing rings are symmetrically embedded on the surface of the slider;

[0005] Among them, the locking assembly includes two groups of locking grooves symmetrically distributed on the inner wall of the drive cavity. An installation cavity is opened in the middle of the slider, and a locking rod assembly for cooperating with the locking grooves to lock and limit the slider is arranged inside the installation cavity.

[0006] In the above technical solution, preferably, the locking assembly further includes two mounting shells symmetrically distributed and fixedly connected to the top of the housing. The mounting shell is communicated with the adjacent connection hole. A blocking block is slidably connected to the inner wall of the mounting shell. A first spring is fixedly connected between the bottom of the blocking block and the top of the housing. A connection channel is opened on the surface of the blocking block. A docking hole is opened on one side of the mounting shell. The blocking block blocks the docking hole. A diversion hole is opened on the surface of the blocking block.

[0007] In the above technical solution, preferably, two groups of electromagnets are embedded in the top of the housing and are respectively located inside the two mounting shells. The blocking block is a component made of nickel-based alloy material.

[0008] In the above technical solution, preferably, a connection shell is fixedly connected to the top of the installation shell. A pressing plate is slidably connected to the inner wall of the connection shell. Hydraulic oil is filled between the top of the pressing plate and the inside of the connection shell. A connection column is fixedly connected to the bottom of the pressing plate. The lower end of the connection column sequentially penetrates through the connection shell and the installation shell and is fixedly connected to the top of the stopper.

[0009] In the above technical solution, preferably, a connection cavity is formed at the bottom of the stopper. A diversion pipe is arranged inside the connection cavity. A connection channel communicating with the diversion pipe is formed among the pressing plate, the connection column and the inside of the stopper.

[0010] In the above technical solution, preferably, the lock rod assembly includes two fixed shells fixedly connected to the inner wall of the installation cavity and symmetrically distributed. An installation groove communicating with the fixed shell is formed on the surface of the installation cavity. A locking rod is slidably connected to the inner wall of the installation groove. The other end of the locking rod penetrates out of the fixed shell and extends into the adjacent lock groove. A second spring is fixedly connected between the surface of the locking rod and the inner wall of the fixed shell.

[0011] In the above technical solution, preferably, an adjustment cavity is formed between the bottom of the locking rod and the inner wall of the installation groove. The other end of the diversion pipe is communicated with the adjacent adjustment cavity.

[0012] In the above technical solution, preferably, the cleaning assembly includes an installation block fixedly connected to one side of the outer shell. A second sealing ring is embedded and installed inside the installation block. The push rod penetrates out of the installation block. A detachable first cleaning ring is embedded and installed on the side of the installation block away from the outer shell.

[0013] In the above technical solution, preferably, there are two docking blocks symmetrically distributed on the side of the installation block away from the outer shell. Two mounting plates symmetrically distributed are fixedly connected to the surface of the docking block. A second cleaning ring is embedded and installed inside the docking block. The second cleaning ring is made of a water-absorbing cotton material.

[0014] In the above technical solution, preferably, a liquid storage cavity is formed inside the docking block. A flow channel is formed on the inner wall of the liquid storage cavity. An injection hole is formed on the surface of the docking block. A detachable plugging rod is arranged on the inner wall of the injection hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By setting the locking component, the mutual cooperation of the stopper, the first spring, the diversion hole, the connection hole and the docking hole can be utilized. After the push rod moves into place, the communication between the connection hole and the docking hole is blocked, ensuring that the hydraulic oil in the driving cavity cannot flow, thereby achieving the effect of stabilizing the position of the push rod. And during this process, the pressing plate can squeeze the hydraulic oil stored inside the connection shell, and the squeezed hydraulic oil can be injected into the inside of the adjustment cavity through the connection channel and the diversion pipe. Furthermore, it can push the locking rod to extend from the inside of the fixed shell and insert into the inside of the adjacent locking groove, thus realizing the effect of mechanical locking and further improving the locking effect on the position of the push rod.

[0017] During the process of retracting the push rod, it can contact the surface of the second cleaning ring. By injecting cleaning water into the inside of the liquid storage cavity, the second cleaning ring can be infiltrated through the flow channel, thereby improving the cleaning effect on the surface of the push rod and reducing the situation where the dust adhered to the extended part of the push rod is brought into the inside of the driving cavity. The setting of the second cleaning ring is used to reduce the situation where dust adheres and enters the inside of the driving cavity, improving the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is a schematic cross-sectional diagram of the present invention;

[0020] Figure 3 is Figure 2 an enlarged view of A in

[0021] Figure 4 is a schematic distribution diagram of the installation shell, the connection shell and the outer shell of the present invention;

[0022] Figure 5 is a schematic connection diagram of the pressing plate, the connecting column and the stopper of the present invention;

[0023] Figure 6 is a schematic connection diagram of the fixed shell and the locking rod of the present invention;

[0024] Figure 7 is a schematic structural diagram of the cleaning component of the present invention.

[0025] In the figure: 1. Outer shell; 101. Push rod; 102. Connecting hole; 103. Driving cavity; 104. Slide block; 105. First sealing ring; 2. Locking component; 201. Lock groove; 202. Mounting shell; 203. Docking hole; 204. Stopper; 205. First spring; 206. Electromagnet; 207. Connecting shell; 208. Diversion pipe; 209. Diversion hole; 210. Connecting channel; 211. Connecting column; 212. Extrusion plate; 213. Fixed shell; 214. Locking rod; 215. Second spring; 3. Cleaning component; 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 cavity; 309. Plugging rod. Detailed implementation manners

[0026] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0027] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed below.

[0028] As Figures 1 - 7 shown, an electro-hydraulic cylinder used in an aerial lift includes an outer shell 1. A driving cavity 103 is opened inside the outer shell 1. A slide block 104 is slidably connected inside the driving cavity 103. One side of the slide block 104 is fixedly connected to a push rod 101. The other end of the push rod 101 penetrates out of the outer shell 1. Two symmetrically distributed connecting holes 102 are opened on the surface of the outer shell 1. A locking component 2 is arranged on the top of the outer shell 1. A cleaning component 3 for cleaning the surface of the push rod 101 is arranged on one side of the outer shell 1. Two symmetrically distributed first sealing rings 105 are embedded on the surface of the slide block 104;

[0029] Among them, the locking component 2 includes two groups of symmetrically distributed lock grooves 201 opened on the inner wall of the driving cavity 103. An installation cavity is opened in the middle of the slide block 104. A locking rod assembly for cooperating with the lock grooves 201 to lock and limit the slide block 104 is arranged inside the installation cavity.

[0030] By injecting hydraulic oil into different connecting holes 102, the effect of left and right sliding of the slide block 104 can be achieved, thereby driving the push rod 101 to move.

[0031] As Figures 1 - 5As shown, the locking assembly 2 further includes two mounting shells 202 that are both fixedly connected to the top of the housing 1 and symmetrically distributed. The mounting shell 202 communicates with the adjacent connection hole 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 housing 1. A connection channel 210 is formed on the surface of the stopper 204. A docking hole 203 is formed on one side of the mounting shell 202. The stopper 204 blocks the docking hole 203. A diversion hole 209 is formed on the surface of the stopper 204.

[0032] Two electromagnets 206 are embedded and installed on the top of the housing 1 and are respectively located inside the two mounting shells 202. The stopper 204 is a component made of nickel-based alloy material.

[0033] A connection shell 207 is fixedly connected to the top of the mounting shell 202. An extrusion plate 212 is slidably connected to the inner wall of the connection shell 207. Hydraulic oil is filled between the top of the extrusion plate 212 and the inside of the connection shell 207. A connection column 211 is fixedly connected to the bottom of the extrusion plate 212. The lower end of the connection column 211 sequentially penetrates through the connection shell 207 and the mounting shell 202 and is fixedly connected to the top of the stopper 204.

[0034] A connection cavity is formed at the bottom of the stopper 204. A diversion tube 208 is arranged inside the connection cavity. A connection channel 210 that communicates with the diversion tube 208 is formed among the extrusion plate 212, the connection column 211, and the inside of the stopper 204.

[0035] The locking rod assembly includes two fixed shells 213 that are fixedly connected to the inner wall of the installation cavity and are symmetrically distributed. An installation groove that communicates with the fixed shell 213 is formed on the surface of the installation cavity. A locking rod 214 is slidably connected to the inner wall of the installation groove. The other end of the locking rod 214 penetrates out of the fixed shell 213 and extends into 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.

[0036] An adjustment cavity is formed between the bottom of the locking rod 214 and the inner wall of the installation groove. The other end of the diversion tube 208 communicates with the adjacent adjustment cavity.

[0037] During the use of the elevator, the load received is transmitted to the slider 104 through the push rod 101, which will squeeze the hydraulic oil stored inside the drive chamber 103, causing a small part of the hydraulic oil to be guided back to the hydraulic station through the injection channel, resulting in a small amount of retraction of the push rod 101. This poses a relatively large safety hazard. Therefore, by setting the locking component 2, under normal conditions, the electromagnet 206 is not energized and does not generate magnetic force. Thus, under the action of the first spring 205, the stopper 204 can be driven to closely adhere to the inner wall of the mounting shell 202. At this time, the inner top wall of the mounting shell 202 blocks the diversion hole 209, and the stopper 204 blocks the docking hole 203. At this time, the hydraulic oil inside the drive chamber 103 cannot flow through the connection hole 102, thereby ensuring the stability of the hydraulic oil inside the drive chamber 103, ensuring that the position of the slider 104 does not change, achieving hydraulic self-locking of the push rod 101, and further ensuring the stability of the elevator.

[0038] When the position of the push rod 101 needs to be adjusted, the electromagnet 206 can be activated to generate magnetic force to adsorb the stopper 204 of the nickel-based alloy material component. During this process, the first spring 205 can be squeezed. During 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 diversion hole 209, and thus can flow through the connection hole 102 and the docking hole 203. At this time, the position of the push rod 101 can be adjusted. After the adjustment is completed, the electromagnet 206 is powered off, so as to stop adsorbing the stopper 204 and then the stopper 204 can be driven to reset under the action of the first spring 205, realizing self-locking of the push rod 101. During this process, the stopper 204 can drive the connecting column 211 and the pressing plate 212 to reset. The pressing plate 212 can squeeze the hydraulic oil stored inside the connecting shell 207. The squeezed hydraulic oil can be injected into the inside of the adjustment chamber through the connecting channel 210 and the diversion pipe 208, and then the locking rod 214 can be pushed out of the fixed shell 213 and inserted into the inside of the adjacent locking groove 201, thus realizing the effect of mechanical locking and improving the limiting effect on the push rod 101. When the electromagnet 206 adsorbs the stopper 204, the pressing plate 212 moves down synchronously. At this time, the space between the top of the pressing 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 inside the adjustment chamber to be guided back to the inside of the connecting shell 207 for storage for reuse.

[0039] As Figures 1 - 5 shown, the cleaning component 3 includes a mounting block 301 fixedly connected to one side of the housing 1. A second sealing ring 302 is embedded and installed inside the mounting block 301. The push rod 101 penetrates through the mounting block 301. A detachable first cleaning ring 303 is embedded and installed on the side of the mounting block 301 away from the housing 1.

[0040] On one side of the mounting block 301 away from the housing 1, there are two symmetrically distributed docking blocks 304. On the surface of the docking blocks 304, there are two symmetrically distributed mounting plates 306. Inside the docking blocks 304, a second cleaning ring 305 is embedded. The second cleaning ring 305 is made of absorbent cotton material.

[0041] A liquid storage cavity 308 is formed inside the docking block 304. A flow channel 307 is formed on the inner wall of the liquid storage cavity 308. An injection hole is formed on the surface of the docking block 304. A detachable plugging rod 309 is arranged on the inner wall of the injection hole. The plugging rod 309 is screwed on.

[0042] During the retraction process of the push rod 101, it can contact the surface of the second cleaning ring 305. By injecting cleaning water into the liquid storage cavity 308, the second cleaning ring 305 can be wetted through the flow channel 307, thereby improving the cleaning effect on the surface of the push rod 101 and reducing the situation that the dust adhered to the extended part of the push rod 101 enters the driving cavity 103. The setting of the second cleaning ring 305 is used to reduce the situation that dust adheres and enters the driving cavity 103. The setting of the first cleaning ring 303 can reduce the situation that the cleaning water adhered to the surface of the push rod 101 enters the driving cavity 103, effectively improving the service life of the device.

[0043] Working principle: When the position of the push rod 101 needs to be adjusted, the electromagnet 206 can be activated to generate magnetic force to adsorb the stop block 204 made of nickel-based alloy material. During this process, the first spring 205 can be compressed. During this process, the top of the stop block 204 is separated from the inner bottom wall of the mounting shell 202. At this time, the hydraulic oil can flow through the diversion hole 209, and thus can flow through the connection hole 102 and the docking hole 203. At this time, the position of the push rod 101 can be adjusted. After the adjustment is completed, the electromagnet 206 is powered off, so as to stop adsorbing the stop block 204 and then the stop block 204 can be driven to reset under the action of the first spring 205, realizing the self-locking of the push rod 101. During this process, the stop block 204 can drive the connecting column 211 and the extrusion plate 212 to reset. The extrusion plate 212 can extrude the hydraulic oil stored inside the connecting shell 207. The extruded hydraulic oil can be injected into the adjustment cavity through the connecting channel 210 and the diversion pipe 208, and then the locking rod 214 can be pushed out of the fixed shell 213 and inserted into the adjacent locking groove 201, thus realizing the mechanical locking effect and improving the limiting effect on the push rod 101. When the electromagnet 206 adsorbs the stop block 204, the extrusion plate 212 moves downward synchronously. At this time, the space between the top of the extrusion 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 the hydraulic oil stored in the adjustment cavity is extruded and guided back to the inside of the connecting shell 207 through the diversion pipe 208 and the connecting channel 210 for reuse.

[0044] The foregoing has shown and described 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 by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended 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 sets 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); a locking rod assembly is provided inside the mounting cavity for cooperating with the locking grooves (201) to lock and limit the slider (104); The locking assembly (2) further comprises two mounting shells (202) both fixedly connected to the top of the housing (1) and symmetrically distributed, the mounting shells (202) being connected to adjacent connecting holes (102), a stopper (204) being slidably connected to the inner wall of the mounting shell (202), a first spring (205) being fixedly connected between the bottom of the stopper (204) and the top of the housing (1), a connecting channel (210) being provided on the surface of the stopper (204), a docking hole (203) being provided on one side of the mounting shell (202), the stopper (204) shielding the docking hole (203), and a guide hole (209) being provided on the surface of the stopper (204); An extrusion plate (212) is provided on the top of the stopper (204); a connecting column (211) is fixedly connected to the bottom of the extrusion plate (212); 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); The locking rod assembly comprises two fixed shells (213) fixedly connected to the inner wall of the installation cavity and symmetrically distributed, a 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 an 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); 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 flow guide tube (208) is in communication with an adjacent adjustment cavity.

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

3. The electronically controlled hydraulic cylinder used in an aerial lift according to claim 2, characterized in that: The top of the mounting shell (202) is fixedly connected to a connecting shell (207), the extrusion plate (212) is slidably connected to the inner wall of the connecting shell (207), hydraulic oil is filled between the top of the extrusion plate (212) and the interior of the connecting shell (207), and 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).

4. 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).

5. The electronically controlled hydraulic cylinder used in an aerial lift according to claim 4, 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.

6. The electronically controlled hydraulic cylinder used in an aerial lift according to claim 5, 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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