Electro-hydraulic pusher

Abstract

The invention relates to the technical field of electric-hydraulic push rods, in particular to an electric-hydraulic push rod which comprises an oil cylinder. The motor is fixedly connected to the side wall of the oil cylinder; the piston rod is slidably connected into the oil cylinder, and the input end of the piston rod is connected with an output shaft of the motor; the connector is fixedly connected to the output end of the piston rod; through cooperation of the hose and the auxiliary oil tank, when the piston rod contracts and is filled with oil, oil enters the auxiliary oil tank from the connecting pipe and the hose, part of gas is exhausted through the exhaust pipe, when the piston rod extends, the pressure is reduced, and oil in the auxiliary oil tank enters the oil cylinder through the hose and the connecting pipe; vertical and horizontal universality is achieved by meeting the oil volume change generated when the hydraulic push rod advances and retreats. After improvement, the electro-hydraulic push rod can be used vertically and horizontally, the application range of the electro-hydraulic push rod is widened, multiple electro-hydraulic push rods in a workshop can achieve spare part unification, the number of purchased spare parts can be directly reduced by half, and meanwhile the storage space is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electro-hydraulic push rods, in particular to an electro-hydraulic push rod. Background Art

[0002] The electro-hydraulic push rod is a hydraulically driven manipulator that integrates mechanical, electrical and hydraulic functions. It is suitable for reciprocating push-pull linear motion, and can also be used in places where workpieces need to be raised, lowered or clamped. It can also achieve centralized or automatic control in remote dangerous areas. It has been widely used in metallurgy, mining, electricity, coal, machinery, transportation, food, chemical industry, cement, water conservancy, building materials, transportation and other departments. It is a universal power source. The electro-hydraulic push rod consists of an actuator, a control mechanism and a power source. According to the on-site installation space and user usage, the electro-hydraulic push rod can have a variety of structural forms.

[0003] A Chinese patent with the publication number CN02264535.7 discloses an integrated electro-hydraulic push rod, which includes a motor, a cylinder, a piston, a piston rod, a guide sleeve, an integrated block valve, an oil pump, a pump base, and a coupling. The oil suction valve is arranged on the oil pump and is connected to the oil pump. The integrated block is directly connected to the oil pump and the oil inlet of the oil cylinder by a plate type and is sealed by a sealing ring. Since the oil suction valve and the oil pump are connected together, they are not restricted by the integrated block. When working, the oil suction is unobstructed, the noise is significantly reduced, and the service life of the oil pump is increased. The materials of the integrated block and the valve port are improved, and the valve port is not easy to wear. In addition, since the integrated block is directly connected to the oil inlet of the oil pump and the oil cylinder by a plate type, the pipelines are reduced, the space is reduced, and the operation and maintenance are convenient.

[0004] In the current existing technology, the electro-hydraulic push rod is divided into vertical and horizontal push rods when in use. When the horizontal push rod is installed in the upright position, the oil must be higher than the oil suction port position to be used normally. However, after the oil is filled, there is no cavity to contain the oil, which will cause the internal pressure to rise and be discharged from the exhaust hole, causing the hydraulic push rod to be unable to move; the same problem also exists when the vertical push rod is installed horizontally, resulting in the two being incompatible, limiting the scope of use of the electro-hydraulic push rod.

[0005] To this end, the present invention provides an electro-hydraulic push rod. Summary of the invention

[0006] To this end, the technical problem to be solved by the present invention is to overcome the problem in the prior art that the electro-hydraulic push rods are divided into vertical and horizontal push rods when in use. When the horizontal push rod is installed in the upright position, the oil must be higher than the oil suction port position to be used normally. However, after the oil is filled, there is no cavity to contain the oil, which will cause the internal pressure to rise and be discharged from the exhaust hole, causing the hydraulic push rod to be unable to move; the same problem also exists when the vertical push rod is installed flat, resulting in the two being incompatible, limiting the scope of use of the electro-hydraulic push rod.

[0007] In order to solve the above technical problems, the present invention provides an electro-hydraulic push rod, comprising:

[0008] Oil cylinder;

[0009] A motor fixedly connected to the side wall of the oil cylinder;

[0010] A piston rod slidably connected to the inside of the cylinder;

[0011] A connector fixedly connected to the output end of the piston rod;

[0012] Two connecting pins symmetrically fixed to the outer side wall of the oil cylinder;

[0013] An oil balance assembly provided on the outside of the oil cylinder;

[0014] The oil balance assembly includes a connecting pipe connected and fixedly connected to the oil cylinder, a sealing cover is installed at one end of the connecting pipe away from the oil cylinder, a hose is connected and fixedly connected to the sealing cover, an auxiliary oil tank is provided on one side of the motor, one end of the hose is connected and fixedly connected to the auxiliary oil tank, the auxiliary oil tank is connected and fixedly connected to an exhaust pipe, and an exhaust valve is installed on the exhaust pipe; the volume of the oil cylinder is 3 times the volume of the auxiliary oil tank; the output shaft of the motor is fixedly connected to a coupling seat; one end of the coupling seat is fixedly connected to an oil pump.

[0015] In one embodiment of the present invention, one end of the hose is connected through the auxiliary oil tank, and one end of the hose is fixedly connected to a gravity ball. A through hole is provided in the gravity ball and is connected to the hose.

[0016] In one embodiment of the present invention, a main oil tank is fixedly connected to a side wall of the motor away from the oil cylinder, the auxiliary oil tank is fixedly connected to the main oil tank, an oil pipe is connected and fixed to the main oil tank, one end of the oil pipe is connected to the oil cylinder and installed on the oil pump, a filter cartridge is inserted into the main oil tank, and an oil cover is provided on the filter cartridge; the oil cover is threadedly connected to the main oil tank.

[0017] In one embodiment of the present invention, the bottom of the filter cylinder is fixedly connected to the inner wall of the main oil tank and is rotatably connected to a rotating rod via a rotating shaft. The bottom of the rotating rod is fixedly connected to an impeller, and the top of the rotating rod is fixedly connected to a U-shaped rod, and the U-shaped rod is in close contact with the inner wall of the filter cylinder.

[0018] In one embodiment of the present invention, a heat dissipation box is fixedly connected to the outer side wall of the oil cylinder, two heat dissipation fans are installed on the inner side wall of the heat dissipation box, and a plurality of heat dissipation holes are opened on the heat dissipation box.

[0019] In one embodiment of the present invention, a plurality of cooling fins are provided in the heat dissipation box, and the cooling fins are all fixedly connected to the oil cylinder. A cooling pipe is inserted in the heat dissipation fin, and one end of the cooling pipe extends to the outside of the heat dissipation box and is connected and fixedly connected to an input pipe, and one end of the input pipe is connected and fixedly connected to the main oil tank; the other end of the cooling pipe extends to the outside of the heat dissipation box and is connected and fixedly connected to an output pipe, and one end of the output pipe is connected and fixedly connected to the main oil tank, and a circulating pump is fixedly connected to the outer wall of the oil cylinder.

[0020] In one embodiment of the present invention, a temperature sensor is fixedly connected to the inner wall of the oil cylinder, the input pipe is installed on the circulation pump, and a refrigerator is fixedly connected to the main oil tank; the temperature sensor is electrically connected to the cooling fan, the circulation pump and the refrigerator.

[0021] In one embodiment of the present invention, a connecting block is fixedly connected to the outer wall of the piston cylinder, and a limiting rod is connected to the connecting block via bolts; two limiting blocks are fixedly connected to the outer wall of the oil cylinder, and the limiting rods are slidably connected to the limiting blocks.

[0022] In one embodiment of the present invention, the oil cap is connected and fixedly connected with an oil inlet pipe, and a plug is inserted into the oil inlet pipe.

[0023] In one embodiment of the present invention, an oil seal is installed at one end of the inner wall of the oil cylinder close to the connecting head, and the piston rod is slidably connected in the oil seal.

[0024] The above technical solution of the present invention has the following advantages compared with the prior art:

[0025] The electro-hydraulic push rod described in the present invention cooperates with a hose and an auxiliary oil tank. When the piston rod is retracted and the oil is filled, the oil will enter the auxiliary oil tank from the connecting pipe and the hose, wherein some gas is discharged through the exhaust pipe. When the piston rod is extended, the pressure becomes smaller, and the oil in the auxiliary oil tank will enter the oil cylinder through the hose and the connecting pipe, so as to meet the change in oil volume generated when the hydraulic push rod advances and retreats, so as to realize vertical and horizontal common use. After improvement, the electro-hydraulic push rod can be used in both vertical and horizontal modes by using this method, thereby increasing the scope of application of the electro-hydraulic push rod. Spare parts for multiple electro-hydraulic push rods in a workshop can be unified, and the purchase of spare parts can be directly reduced by half, while also reducing the storage space. When in use, the gravity ball is used to keep one end of the hose at the bottom of the auxiliary oil tank, so as to keep the oil flowing at all times, whether it is vertical or horizontal.

[0026] The electro-hydraulic push rod described in the present invention cooperates with a filter box, an impeller and a scraper rod. By regularly starting the oil pump, the oil cylinder is filled with oil through the oil pipe, so as to maintain a sufficient supply of oil and prevent insufficient oil from causing friction loss to the oil cylinder and the piston rod. A one-way valve is provided to prevent the oil in the oil cylinder from flowing back into the main oil tank. The oil is filtered by providing a filter box to prevent foreign particles in the main oil tank from entering the oil cylinder and causing damage to the oil cylinder or the piston rod. During the filtering process, some particulate impurities are attached to the surface of the filter box, causing the filter box to be blocked and reducing the flow rate. By providing an impeller, the oil drives the impeller to rotate when it flows, and the impeller drives the scraper rod to rotate through the rotating shaft. The scraper rod scrapes off the impurities on the surface of the filter box, thereby achieving the function of quickly cleaning the impurities.

[0027] The electro-hydraulic push rod described in the present invention cooperates with heat dissipation fins, input pipes and output pipes; the heat dissipation area is increased by the heat dissipation fins to accelerate the heat dissipation, wherein cooling oil is transported in the cooling pipe, and the cooling oil is in the main oil tank. Under the action of a circulating pump, the cooling oil flows into the cooling pipe through the input pipe and finally flows back to the main oil tank from the output pipe to realize the cooling circulation of the oil; the heat dissipation of the oil cylinder is realized by a heat dissipation fan, and the heat is dissipated through the heat dissipation holes to realize the cooling function; when the temperature sensor is in use, by monitoring the temperature of the oil in the oil cylinder, when the oil temperature is higher than the set value, the heat dissipation fan, the circulating pump and the refrigerator are automatically turned on, the refrigerator cools the oil, and the circulating pump realizes the circulation of the oil, and under the action of the heat dissipation fan, the heat dissipation is accelerated. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings.

[0029] Figure 1 is a first stereogram of the present invention;

[0030] Figure 2 is a second stereogram of the present invention;

[0031] Figure 3 is a cross-sectional view of the present invention;

[0032] Figure 4 It is a three-dimensional diagram of the heat dissipation box in the present invention;

[0033] Figure 5 It is an enlargement of A in the present invention;

[0034] Figure 6 is a three-dimensional diagram of the heat dissipation fan in the present invention;

[0035] Figure 7 is a three-dimensional diagram of the limiting rod in the present invention;

[0036] Figure 8is a three-dimensional diagram of the main oil tank of the present invention;

[0037] Explanation of the reference numerals in the specification: 1. Cylinder; 11. Motor; 12. Piston rod; 13. Connecting head; 14. Connecting pin; 15. Oil seal; 16. Coupling seat; 17. Oil pump; 2. Connecting pipe; 21. Sealing cover; 22. Auxiliary oil tank; 23. Hose; 24. Exhaust pipe; 25. Gravity ball; 3. Main oil tank; 31. Oil cap; 32. Plug; 33. Oil inlet pipe; 34. Oil delivery pipe; 35. Filter cartridge; 36. Refrigerator; 37. Rotating rod; 38. Impeller; 39. U-shaped rod; 4. Heat sink; 41. Cooling fan; 42. Cooling fins; 43. Cooling pipe; 44. Input pipe; 45. Circulation pump; 46. Output pipe; 47. Temperature sensor; 5. Limit rod; 51. Connecting block; 52. Limit block. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0039] See also Figure 1 - Figure 8 The present invention provides an electro-hydraulic push rod, comprising: an oil cylinder 1; a motor 11 fixedly connected to the side wall of the oil cylinder 1; a piston rod 12 slidably connected to the inside of the oil cylinder 1, wherein the input end of the piston rod 12 is connected to the output shaft of the motor 11; a connector 13 fixedly connected to the output end of the piston rod 12; two connecting pins 14 symmetrically fixedly connected to the outer wall of the oil cylinder 1; an oil balance component arranged outside the oil cylinder 1; the oil balance component comprises a connecting pipe 2 connected to and fixed to the oil cylinder 1, wherein the connecting pipe 2 is away from the oil cylinder 1. A cover 21 is installed at one end of the oil cylinder 1, and a hose 23 is connected and fixed to the cover 21. A subsidiary oil tank 22 is provided on one side of the motor 11, and one end of the hose 23 is connected and fixed to the subsidiary oil tank 22. An exhaust pipe 24 is connected and fixed to the subsidiary oil tank 22, and an exhaust valve is installed on the exhaust pipe 24. The volume of the oil cylinder 1 is 3 times the volume of the subsidiary oil tank 22. The output shaft of the motor 11 is fixedly connected to a coupling seat 16; one end of the coupling seat 16 is fixedly connected to an oil pump 17.

[0040] When the electro-hydraulic push rod is working, it drives the motor 11. After the motor 11 is started, the oil pump 17 is driven to rotate through the coupling seat 16. The oil pump 17 sucks hydraulic oil from the main oil tank 3 and outputs it after pressurization; the high-pressure oil enters one side of the oil cylinder 1, and pushes the piston rod 12 out under the action of the hydraulic pressure; when it is necessary to return, the high-pressure oil enters the other side to retract the piston rod 12; usually, when the electro-hydraulic push rod is in use, it is divided into vertical and horizontal push rods. When the horizontal push rod is installed in an upright position, the oil must be higher than the oil suction port position to be used normally. However, after the oil is filled, there is no cavity to accommodate the oil, which will cause the internal pressure to rise and be discharged from the exhaust hole, causing the hydraulic push rod to be unable to move; the same problem also exists when the vertical push rod is installed flat, which makes the two incompatible, limiting the electro-hydraulic push rod The scope of use of the oil balance component provided by the present invention is that when the piston rod 12 is contracted, the hydraulic oil fills the oil cylinder 1 through the cooperation of the hose 23 and the auxiliary oil tank 22, and the oil will enter the auxiliary oil tank 22 from the connecting pipe 2 and the hose 23, wherein some of the gas is discharged through the exhaust pipe 24. When the piston rod 12 needs to be extended, under the action of the hydraulic pressure difference, the oil in the auxiliary oil tank 22 will pass through the hose 23 and the connecting pipe 2 and enter the oil cylinder 1, so as to meet the change in oil volume generated when the hydraulic push rod advances and retreats to realize vertical and horizontal universal use; after improvement, using this method, the electric hydraulic push rod can realize vertical and horizontal universal use, thereby improving the scope of application of the electric hydraulic push rod, and the spare parts of multiple electric hydraulic push rods in the workshop can be unified, and the purchase of spare parts can be directly reduced by half, while also reducing the storage space.

[0041] Furthermore, if Figure 3 As shown, one end of the hose 23 is connected through the auxiliary oil tank 22 , and one end of the hose 23 is fixedly connected to a gravity ball 25 . A through hole is provided in the gravity ball 25 and is connected to the hose 23 .

[0042] The gravity ball 25 provided by the present invention is used to keep one end of the hose 23 located at the bottom of the auxiliary oil tank 22 when in use, so as to keep the oil flowing at all times whether it is vertical or in a bedroom.

[0043] Furthermore, if Figure 2 As shown, a main oil tank 3 is fixedly connected to a side wall of the motor 11 away from the oil cylinder 1, and the auxiliary oil tank 22 is fixedly connected to the main oil tank 3. An oil pipe 34 is connected and fixed to the main oil tank 3, and one end of the oil pipe 34 is connected to the oil cylinder 1 and installed on the oil pump 17. A filter cartridge 35 is inserted into the main oil tank 3, and an oil cover 31 is provided on the filter cartridge 35; the oil cover 31 is threadedly connected to the main oil tank 3.

[0044] When the main oil tank 3 provided by the present invention is in use, by turning on the oil pump 17, it is convenient to fill the oil cylinder 1 through the oil pipe 34, so as to maintain sufficient oil supply and prevent insufficient oil from causing friction loss to the oil cylinder 1 and the piston rod 12. At the same time, the high pressure generated by the hydraulic oil drives the piston rod 12 to reciprocate. The hydraulic oil is filtered by setting a filter cartridge 35, and the oil cover 31 is set to facilitate the disassembly of the oil cover 31 and the filter cartridge 35, so as to achieve uniform cleaning of impurities in the filter cartridge 35.

[0045] Furthermore, if Figure 5 and Figure 8 As shown, the bottom of the filter cylinder 35 is fixedly connected to the inner wall of the main oil tank 3, and is rotatably connected to a rotating rod 37 via a rotating shaft. The bottom of the rotating rod 37 is fixedly connected to an impeller 38, and the top of the rotating rod 37 is fixedly connected to a U-shaped rod 39, and the U-shaped rod 39 is in close contact with the inner wall of the filter cylinder 35.

[0046] When the filter cartridge 35 provided by the present invention is in use, impurities will block the filter holes of the filter cartridge 35 after filtering for a period of time, thereby causing the filter cartridge 35 to be blocked and reducing the oil intake speed. Through the cooperation of the impeller 38 and the U-shaped rod 39, the hydraulic oil drives the impeller 38 to rotate when flowing, and the impeller 38 drives the U-shaped rod 39 to rotate through the rotating rod 37. The U-shaped rod 39 scrapes the inner wall of the filter cartridge 35 when rotating, thereby realizing the function of quickly cleaning impurities.

[0047] Furthermore, if Figure 6 As shown, a heat dissipation box 4 is fixedly connected to the outer wall of the oil cylinder 1 , two heat dissipation fans 41 are installed on the inner wall of the heat dissipation box 4 , and a plurality of heat dissipation holes are opened on the heat dissipation box 4 .

[0048] When the heat dissipation fan 41 provided by the present invention is in use, the heat dissipation of the oil cylinder 1 is achieved through the heat dissipation fan 41, and the heat is dissipated through the heat dissipation holes to achieve the function of cooling.

[0049] Furthermore, if Figure 4 As shown, the heat dissipation box 4 is provided with a plurality of heat dissipation fins 42, and the heat dissipation fins 42 are all fixedly connected to the oil cylinder 1. A cooling pipe 43 is inserted into the heat dissipation fin 42, and one end of the cooling pipe 43 extends to the outside of the heat dissipation box 4 and is connected and fixedly connected to an input pipe 44, and one end of the input pipe 44 is connected and fixedly connected to the main oil tank 3; the other end of the cooling pipe 43 extends to the outside of the heat dissipation box 4 and is connected and fixedly connected to an output pipe 46, and one end of the output pipe 46 is connected and fixedly connected to the main oil tank 3, and a circulating pump 45 is fixedly connected to the outer wall of the oil cylinder 1.

[0050] When in use, the input pipe 44 and the output pipe 46 provided by the present invention increase the heat dissipation area through the heat dissipation fins 42 to accelerate heat dissipation, wherein cooling oil is transported in the cooling pipe 43. The cooling oil is in the main oil tank 3 and, under the action of the circulating pump 45, flows into the cooling pipe 43 through the input pipe 44 and finally flows back to the main oil tank 3 from the output pipe 46, thereby realizing the cooling circulation of the oil.

[0051] Furthermore, if Figure 3 As shown, a temperature sensor 47 is fixedly connected to the inner wall of the oil cylinder 1, the input pipe 44 is installed on the circulation pump 45, and a refrigerator 36 is fixedly connected to the main oil tank 3; the temperature sensor 47 is electrically connected to the cooling fan 41, the circulation pump 45 and the refrigerator 36.

[0052] When in use, the temperature sensor 47 provided by the present invention monitors the temperature of the oil in the cylinder 1. When the oil temperature is higher than the set value, the cooling fan 41, the circulating pump 45 and the refrigerator 36 are automatically turned on. The refrigerator 36 cools the oil, and the circulating pump 45 circulates the oil. Under the action of the cooling fan 41, heat dissipation is accelerated.

[0053] Furthermore, if Figure 7 As shown, a connecting block 51 is fixedly connected to the outer wall of the piston cylinder, and a limiting rod 5 is connected to the connecting block 51 by bolts; two limiting blocks 52 are fixedly connected to the outer wall of the oil cylinder 1, and the limiting rods 5 are slidably connected to the limiting blocks 52.

[0054] When the limiting rod 5 provided by the present invention is in use, the piston rod 12 drives the connecting block 51 to move during the movement of the piston rod 12, and the connecting block 51 drives the limiting rod 5 to move, and the limiting rod 5 slides on the limiting block 52. Under the action of the limiting block 52, the radial movement of the limiting rod 5 and the piston rod 12 is limited.

[0055] Furthermore, if Figure 3 As shown, the oil cover 31 is connected and fixedly connected with an oil inlet pipe 33 , and a plug 32 is inserted into the oil inlet pipe 33 .

[0056] When the oil inlet pipe 33 provided by the present invention is in use, the oil inlet pipe 33 is provided to facilitate refueling of the main oil tank 3 at any time, and the plug 32 is provided to prevent oil leakage.

[0057] Furthermore, if Figure 3 As shown, an oil seal 15 is installed at one end of the inner wall of the oil cylinder 1 close to the connecting head 13 , and the piston rod 12 is slidably connected in the oil seal 15 .

[0058] When in use, the oil plug provided by the present invention is used to seal the connection between the oil cylinder 1 and the piston rod 12 to prevent oil leakage.

[0059] Working principle: When the electro-hydraulic push rod is working, it drives the motor 11. After the motor 11 is started, it drives the oil pump 17 to rotate through the coupling seat 16. The oil pump 17 sucks hydraulic oil from the main oil tank 3 and outputs it after pressurization; the high-pressure oil enters one side of the cylinder 1 and pushes the piston rod 12 out under the action of the hydraulic pressure; when it needs to return, the high-pressure oil enters the other side to retract the piston rod 12; through the cooperation of the hose 23 and the auxiliary oil tank 22, when the piston rod 12 contracts, the hydraulic oil fills the cylinder 1, and the oil will enter the auxiliary oil tank 22 from the connecting pipe 2 and the hose 23, and some of the gas will be discharged through the exhaust pipe 24. The piston rod 12 needs When extended, under the action of the hydraulic pressure difference, the oil in the auxiliary oil tank 22 will enter the oil cylinder 1 through the hose 23 and the connecting pipe 2, so as to meet the change in oil volume generated when the hydraulic push rod advances and retreats, so as to realize the common use of vertical and horizontal types; after improvement, the electro-hydraulic push rod can be used in both vertical and horizontal types after using this method, which improves the application range of the electro-hydraulic push rod, and the spare parts of multiple electro-hydraulic push rods in the workshop can be unified, and the purchase of spare parts can be directly reduced by half, and the storage space is also reduced; the gravity ball 25 is used to keep one end of the hose 23 at the bottom of the auxiliary oil tank 22 when in use, so as to keep the oil flowing at all times whether it is vertical or horizontal;

[0060] By turning on the oil pump 17, it is convenient to fill the oil cylinder 1 through the oil pipe 34, so as to maintain sufficient oil supply and prevent the oil from being insufficient, which will cause friction loss to the oil cylinder 1 and the piston rod 12. At the same time, the high pressure generated by the hydraulic oil drives the piston rod 12 to reciprocate. The hydraulic oil is filtered by setting the filter cartridge 35. The oil cover 31 is provided to facilitate the removal of the oil cover 31 and the filter cartridge 35, so as to realize the unified cleaning of impurities in the filter cartridge 35. After the filter cartridge 35 has been filtered for a period of time, impurities will block the filter holes of the filter cartridge 35, thereby causing the filter cartridge 35 to be blocked and reducing the oil inlet speed. Through the cooperation of the impeller 38 and the U-shaped rod 39, the hydraulic oil drives the impeller 38 to rotate when it flows. The impeller 38 drives the U-shaped rod 39 to rotate through the rotating rod 37. The U-shaped rod 39 scrapes the inner wall of the filter cartridge 35 when it rotates, so as to realize the function of quickly cleaning impurities.

[0061] The heat dissipation area is increased by the heat dissipation fins 42 to accelerate the heat dissipation, wherein the cooling oil is transported in the cooling pipe 43, and the cooling oil is in the main oil tank 3. Under the action of the circulation pump 45, the cooling oil flows into the cooling pipe 43 through the input pipe 44, and finally flows back to the main oil tank 3 from the output pipe 46, so as to realize the cooling circulation of the oil; the heat dissipation of the oil cylinder 1 is realized by the heat dissipation fan 41, and the heat is dissipated through the heat dissipation holes to realize the cooling function; when the temperature sensor 47 is in use, by monitoring the temperature of the oil in the oil cylinder 1, when the oil temperature is higher than the set value, the heat dissipation fan 41, the circulation pump 45 and the refrigerator 36 are automatically turned on, the refrigerator 36 realizes cooling of the oil, and the circulation pump 45 realizes the circulation of the oil, and under the action of the heat dissipation fan 41, the heat dissipation is accelerated;

[0062] When the piston rod 12 is in motion, the piston rod 12 drives the connecting block 51 to move, the connecting block 51 drives the limiting rod 5 to move, the limiting rod 5 slides on the limiting block 52, and under the action of the limiting block 52, the radial movement of the limiting rod 5 and the piston rod 12 is limited; by setting the oil inlet pipe 33, it is convenient to refuel the main oil tank 3 at any time, and by setting the plug 32, oil leakage is prevented; when in use, the oil plug is used to seal the connection between the oil cylinder 1 and the piston rod 12 to prevent oil leakage.

[0063] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. An electro-hydraulic push rod, comprising: Oil cylinder (1); A motor (11) fixedly connected to the side wall of the oil cylinder (1); A piston rod (12) slidably connected to the inside of the oil cylinder (1); A connector (13) fixedly connected to the output end of the piston rod (12); Two connecting pins (14) symmetrically fixed to the outer side wall of the oil cylinder (1); An oil balance component arranged outside the oil cylinder (1); The invention is characterized in that: the oil balance component comprises a connecting pipe (2) connected and fixedly connected to the oil cylinder (1); a sealing cover (21) is installed at one end of the connecting pipe (2) away from the oil cylinder (1); a hose (23) is connected and fixedly connected to the sealing cover (21); a secondary oil tank (22) is provided on one side of the motor (11); one end of the hose (23) is connected and fixedly connected to the secondary oil tank (22); an exhaust pipe (24) is connected and fixedly connected to the secondary oil tank (22); an exhaust valve is installed on the exhaust pipe (24); the volume of the oil cylinder (1) is three times the volume of the secondary oil tank (22); the output shaft of the motor (11) is fixedly connected to a coupling seat (16); one end of the coupling seat (16) is fixedly connected to an oil pump (17).

2. An electro-hydraulic push rod according to claim 1, characterized in that: One end of the hose (23) is connected to the auxiliary oil tank (22), and one end of the hose (23) is fixedly connected to a gravity ball (25). A through hole is provided in the gravity ball (25) and is in communication with the hose (23).

3. An electro-hydraulic push rod according to claim 2, characterized in that: A main oil tank (3) is fixedly connected to a side wall of the motor (11) away from the oil cylinder (1); the auxiliary oil tank (22) is fixedly connected to the main oil tank (3); an oil delivery pipe (34) is connected and fixedly connected to the main oil tank (3); one end of the oil delivery pipe (34) is connected to the oil cylinder (1) and is mounted on the oil pump (17); a filter cartridge (35) is plugged into the main oil tank (3); an oil cover (31) is provided on the filter cartridge (35); and the oil cover (31) is threadedly connected to the main oil tank (3).

4. An electro-hydraulic push rod according to claim 3, characterized in that: The bottom of a filter cartridge (35) is fixedly connected to the inner wall of the main oil tank (3), and is rotatably connected to a rotating rod (37) via a rotating shaft. The bottom of the rotating rod (37) is fixedly connected to an impeller (38). The top of the rotating rod (37) is fixedly connected to a U-shaped rod (39), and the U-shaped rod (39) is in close contact with the inner wall of the filter cartridge (35).

5. The electro-hydraulic push rod according to claim 4, characterized in that: A heat dissipation box (4) is fixedly connected to the outer wall of the oil cylinder (1), two heat dissipation fans (41) are installed on the inner wall of the heat dissipation box (4), and a plurality of heat dissipation holes are opened on the heat dissipation box (4).

6. The electro-hydraulic push rod according to claim 5, characterized in that: The heat dissipation box (4) is provided with a plurality of heat dissipation fins (42), each of which is fixedly connected to the oil cylinder (1). A cooling pipe (43) is inserted into the heat dissipation fin (42), one end of the cooling pipe (43) extends to the outside of the heat dissipation box (4) and is connected and fixedly connected to an input pipe (44), one end of the input pipe (44) is connected and fixedly connected to the main oil tank (3); the other end of the cooling pipe (43) extends to the outside of the heat dissipation box (4) and is connected and fixedly connected to an output pipe (46), one end of the output pipe (46) is connected and fixedly connected to the main oil tank (3), and a circulation pump (45) is fixedly connected to the outer wall of the oil cylinder (1).

7. An electro-hydraulic push rod according to claim 6, characterized in that: A temperature sensor (47) is fixedly connected to the inner wall of the oil cylinder (1), the input pipe (44) is installed on the circulation pump (45), and a refrigerator (36) is fixedly connected to the main oil tank (3); the temperature sensor (47) is electrically connected to the cooling fan (41), the circulation pump (45) and the refrigerator (36).

8. The electro-hydraulic push rod according to claim 7, characterized in that: A connection block (51) is fixedly connected to the outer wall of the piston cylinder, and a limit rod (5) is connected to the connection block (51) via bolts; two limit blocks (52) are fixedly connected to the outer wall of the oil cylinder (1), and the limit rods (5) are slidably connected to the limit blocks (52).

9. The electro-hydraulic push rod according to claim 8, characterized in that: The oil cover (31) is connected and fixedly connected with an oil inlet pipe (33), and a plug (32) is inserted into the oil inlet pipe (33).

10. The electro-hydraulic push rod according to claim 9, characterized in that: An oil seal (15) is installed at one end of the inner wall of the oil cylinder (1) close to the connecting head (13), and the piston rod (12) is slidably connected in the oil seal (15).

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