Novel electric push rod

Abstract

The utility model is suitable for the technical field of electric transmission and hydraulic pressure, and provides a novel electric push rod which comprises a push rod installation block. The oil push rod assembly is assembled on the push rod mounting block, the oil push rod assembly comprises a piston assembly and a cylinder barrel, and the piston assembly is assembled in the cylinder barrel and reciprocates in the cylinder barrel through hydraulic power; the travel switch assembly is assembled on the push rod mounting block and used for controlling the movement travel of the piston assembly; the hydraulic driving assembly is assembled on the push rod mounting block; the oil tank is assembled on the push rod mounting plate, an oil bag used for storing hydraulic oil is arranged in the oil tank, and the oil bag is communicated with the hydraulic driving assembly, so that the hydraulic oil stored in the oil bag is conveyed into the oil push rod assembly under the driving of the hydraulic driving assembly. The oil push rod assembly and the hydraulic driving assembly are integrated through the mounting block, oil reciprocating motion can be converted into mechanical motion that the push rod stretches out and retracts back, friction and loss are extremely small, the structure is compact, and force is large.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric transmission and hydraulic pressure, and particularly relates to a novel electric push rod. Background Art

[0002] An electric push rod is an electric drive device that converts the rotary motion of a drive motor into the linear reciprocating motion of a push rod. Ordinary electric push rods are composed of a drive motor + a reduction gearbox + a T-type screw pair to achieve linear reciprocating motion of extension and retraction. They are generally noisy, have low mechanical efficiency, generally below 35%, and have large mechanical grinding, resulting in a relatively short lifespan. In addition, since the motion load of the screw is not very large, the impact resistance is poor, and the thrust is generally less than 1000KG. Utility Model Content

[0003] The utility model provides a novel electric push rod, aiming to solve at least one problem existing in the above-mentioned prior art.

[0004] The utility model is implemented in this way: a novel electric push rod comprises:

[0005] Push rod mounting block;

[0006] An oil push rod assembly mounted on the push rod mounting block, the oil push rod assembly comprising a piston assembly and a cylinder barrel, the piston assembly being mounted in the cylinder barrel and performing reciprocating motion in the cylinder barrel by hydraulic force;

[0007] A travel switch assembly mounted on the push rod mounting block and used to control the movement stroke of the piston assembly;

[0008] a hydraulic drive assembly mounted on the push rod mounting block;

[0009] An oil tank is mounted on the push rod mounting plate, wherein an oil bag for storing hydraulic oil is arranged in the oil tank, and the oil bag is communicated with the hydraulic drive assembly so that the hydraulic oil stored in the oil bag is delivered to the oil push rod assembly under the drive of the hydraulic drive assembly.

[0010] In one embodiment, the novel electric linear actuator comprises:

[0011] An oil pipe is mounted on the push rod mounting block and embedded in the cylinder barrel. One end of the oil pipe close to the push rod mounting block is connected to the hydraulic drive assembly through an oil circuit so as to transport the hydraulic oil to the piston assembly.

[0012] In one embodiment, a limit groove is provided on the oil pipe, and one end of the travel switch assembly is provided in the limit groove. When the piston assembly moves to a first preset position at one end away from the push rod mounting block, the first limit end of the limit groove collides with the travel switch assembly. When the piston assembly moves to a second preset position at one end close to the push rod mounting block, the second limit end of the limit groove collides with the travel switch assembly.

[0013] In one embodiment, the novel electric linear actuator comprises:

[0014] A reset component is assembled on the push rod mounting block at one end and connected to the oil pipe at the other end. The reset component is used to drive the oil pipe to return to its original position when the oil pipe moves.

[0015] In one embodiment, the novel electric linear actuator comprises:

[0016] A micro switch is mounted on the push rod mounting block, and the micro switch is arranged opposite to the travel switch assembly. When the piston assembly reciprocates, the push rod of the travel switch assembly is pushed to collide with the micro switch to control the movement stroke of the piston assembly.

[0017] In one embodiment, a plurality of grooves are provided on the outer wall of the cylinder, the oil bag is assembled on the cylinder by rolling, and the oil bag is embedded in the grooves by a plurality of sealing members.

[0018] In one embodiment, the hydraulic drive assembly comprises:

[0019] A drive motor, wherein the drive motor comprises a connecting shaft;

[0020] An integrated pump is drivingly connected to the connecting shaft and is used to absorb the hydraulic oil stored in the oil tank.

[0021] In one embodiment, the novel electric linear actuator comprises:

[0022] A control panel disposed on the rear end cover of the hydraulic drive assembly, wherein the control panel is provided with a control joint;

[0023] The temperature control device electrically connected to the control panel is used to control the hydraulic drive component to shut down when the temperature of the hydraulic drive component is greater than a preset temperature.

[0024] In one embodiment, the piston assembly comprises:

[0025] a piston disposed in the cylinder;

[0026] A piston rod is disposed in the cylinder and connected to the piston, and the piston rod is used for reciprocating motion in the cylinder.

[0027] In one embodiment, the novel electric linear actuator comprises:

[0028] The filter disposed between the hydraulic drive assembly and the oil bag is used to filter the hydraulic oil sucked from the oil bag and transmit the filtered hydraulic oil to the oil push rod assembly.

[0029] In an embodiment of the present application, a new type of electric push rod is provided, including: a push rod mounting block; an oil push rod assembly mounted on the push rod mounting block, the oil push rod assembly including a piston assembly and a cylinder, the piston assembly being mounted in the cylinder and performing reciprocating motion in the cylinder by hydraulic force; a travel switch assembly mounted on the push rod mounting block for controlling the movement stroke of the piston assembly; a hydraulic hydraulic drive assembly mounted on the push rod mounting block; an oil tank mounted on the push rod mounting plate, an oil sac for storing hydraulic oil being arranged in the oil tank, the oil sac being connected to the hydraulic drive assembly so that the hydraulic oil stored in the oil sac can be delivered to the oil push rod assembly under the drive of the hydraulic drive assembly. In the embodiment of the present application, the oil push rod assembly is integrated with the hydraulic drive component through the push rod mounting block, which can realize oil supply and hydraulic lifting function, and can make its structure more compact, without the need for assembly every time, which can reduce the difficulty of assembly, and can provide greater driving force, which can generally reach or exceed 1000KG, and has strong impact resistance, which can effectively reduce the problems of high working noise, short life, and poor sealing. In addition, by setting the travel switch assembly, the stroke of the piston assembly can be better and more accurately controlled to improve working stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a cross-section of a new type of electric push rod provided in the embodiment of the present application Figure 1 ;

[0031] Figure 2 It is a structural schematic diagram of a novel electric push rod provided in an embodiment of the present application;

[0032] Figure 3 is a cross-sectional view of a piston assembly provided by an embodiment of the present application when it is retracted into the cylinder;

[0033] Figure 4 is a cross-sectional view of a piston assembly provided in an embodiment of the present application when it moves toward the outside of the cylinder;

[0034] Figure 5 The embodiment of this application provides Figure 1 A partial enlarged view of part A;

[0035] Figure 6 This is a cross-section of a new type of electric push rod provided in the embodiment of the present application Figure 2 ;

[0036] Figure 7 The embodiment of this application provides Figure 6 A partial enlarged view of part B;

[0037] Figure 8 This is a cross-section of the push rod mounting block provided in the embodiment of the present application. Figure 1 ;

[0038] Fig. 9 This is a cross-section of the push rod mounting block provided in the embodiment of the present application. Figure 2 ;

[0039] Fig.10 is a schematic structural diagram of a drive motor end cover provided in an embodiment of the present application;

[0040] Among them, 1. push rod mounting block; 2. oil push rod assembly; 3. piston assembly; 4. cylinder; 5. travel switch assembly; 6. hydraulic drive assembly; 7. oil tank; 8. oil bag; 9. oil pipe; 10. piston; 11. piston rod; 12. limit groove; 13. first limit end; 14. second limit end; 15. first limit block; 16. second limit block; 17. micro switch; 18. reset assembly; 19. groove; 20. rolling strip; 22. drive motor; 23. connecting shaft; 24. integrated pump; 25. filter; 26. control joint; 2 7. Power module; 28. Fixing pin; 29. ​​Rod head; 30. Sealing ring; 31. Dust ring; 32. Wear-resistant ring; 33. Retaining spring assembly; 34. Driving gear; 35. Driven gear; 36. Floating block; 37. Rotary sealing ring; 38. Sealing and fixing assembly; 39. Piston flow control valve; 40. Pressure regulating assembly; 41. First steel ball; 42. Plug; 43. First compression spring; 44. Second compression spring; 45. Second steel ball; 46. Bolt; 47. Spring; 49. Rod seal; 50. Piston seal; 51. Sealing gasket. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0042] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In an embodiment of the present application, a new type of electric push rod is provided, including: a push rod mounting block 1; an oil push rod assembly 2 mounted on the push rod mounting block, the oil push rod assembly 2 including a piston assembly 3 and a cylinder 4, the piston assembly 3 being mounted in the cylinder 4 and performing reciprocating motion in the cylinder 4 by hydraulic force; a travel switch assembly 5 mounted on the push rod mounting block 1 for controlling the movement stroke of the piston assembly 3; a hydraulic drive assembly 6 mounted on the push rod mounting block 1; an oil tank 7 mounted on the push rod mounting block 1, an oil sac 8 for storing hydraulic oil being arranged in the oil tank 7, the oil sac 8 being connected to the hydraulic drive assembly 6 so that the hydraulic oil stored in the oil sac 8 can be transported to the oil push rod assembly 2 under the drive of the hydraulic drive assembly 6. In the embodiment of the present application, the oil push rod assembly is integrated with the hydraulic drive component through the push rod mounting block, which can realize oil supply and hydraulic lifting function, and can make its structure more compact, without the need for assembly every time, which can reduce the difficulty of assembly, and can provide greater driving force, which can generally reach or exceed 1000KG, and has strong impact resistance, which can effectively reduce the problems of high working noise, short life, and poor sealing. In addition, by setting the travel switch assembly, the stroke of the piston assembly can be better and more accurately controlled to improve working stability.

[0045] The push rod mounting block 1 may be made of cast aluminum, the oil push rod assembly 2 may be detachably mounted on the push rod mounting block 1, and the travel switch assembly 5, the hydraulic drive assembly 6 and the oil tank 7 may be detachably mounted on the push rod mounting block 1, for example, by threaded connection through bolts or the like, or by providing a mounting groove on the push rod mounting block 1 and detachably connecting through a clamping method. For example, the oil push rod assembly 2 may be detachably mounted on the push rod mounting block 1 through bolts 46.

[0046] The bolt 46 may be a hexagon socket head bolt.

[0047] A sealing ring 30 is provided between the cylinder 4 and the oil tank 2 to prevent the hydraulic oil in the oil tank from leaking into the cylinder 4 and affecting the hydraulic effect.

[0048] The oil bag 8 can be made of a soft material with a changeable shape, such as rubber, and is used to store hydraulic oil, and can keep the hydraulic oil completely isolated from the atmosphere. When the hydraulic oil enters and leaves the oil tank 7 or the volume of the hydraulic oil in the bag changes due to changes in oil temperature, the oil bag can change its shape to be concave or convex accordingly, so that the oil pressure in the oil bag is always the same as the atmospheric pressure, so as to keep the hydraulic oil clean and the hydraulic system working normally.

[0049] In one embodiment of the present application, the piston assembly 3 includes: a piston 10 disposed in the cylinder 4; a piston rod 11 disposed in the cylinder 4 and connected to the piston 10, the piston rod 11 being used to reciprocate in the cylinder 4. Specifically, the cylinder 4 may be a hollow structure, the piston 10 and the piston rod 11 may be movably disposed in the cylinder 4, and may reciprocate along the length direction of the cylinder 4.

[0050] A rod head 29 is embedded in one end of the piston rod 11 away from the push rod mounting block 1 , and a sealing ring 30 is provided at the connection between the rod head 29 and the piston rod 11 to prevent leakage of hydraulic oil.

[0051] Wherein, sealing rings 30 are provided at both ends of the piston rod 11 to prevent the hydraulic oil from leaking out during the movement of the piston rod 11 .

[0052] A dust ring 31 is provided between the piston rod 11 and the cylinder barrel 4 to prevent dust and other substances from entering the piston assembly 3 to block or damage the piston assembly 3 .

[0053] A wear-resistant ring 32 is provided between the piston rod 11 and the cylinder barrel 4 to prevent the cylinder barrel 4 from being worn during the reciprocating motion of the piston rod 11 . A rod seal 49 is provided between the wear-resistant ring 32 and the dust ring 31 .

[0054] A piston seal 50 is further provided between the piston assembly 3 and the cylinder barrel 4 .

[0055] In the embodiment of the present application, a sealing ring 30 may also be provided between the piston 10 and the piston rod 11 to prevent the hydraulic oil from leaking between the rodless cavity and the rod cavity, thereby affecting the hydraulic effect.

[0056] In the embodiment of the present application, when assembling the piston assembly, a small amount of butter can be applied to the seals and sealing rings to prevent the seals from being scratched during the assembly process. After the assembly is completed, the piston rod can be checked to see whether it is smoothly extended and retracted without producing any abnormal noise.

[0057] In an embodiment of the present application, the new electric push rod includes: an oil pipe 9 assembled on the push rod mounting block 1 and embedded in the cylinder 4, and one end of the oil pipe 9 close to the push rod mounting block 1 is connected to the hydraulic drive assembly 6 through an oil circuit for conveying the hydraulic oil. Specifically, the oil pipe 9 may include a first oil pipe and a second oil pipe. A cavity is provided in the piston rod 11. The first oil pipe and the second oil pipe may be arranged side by side along the length direction of the cavity, and the first oil pipe and the second oil pipe may be connected to the rod cavity and the rodless cavity respectively, and the first oil pipe and the second oil pipe may be connected. When the piston assembly 3 is working, that is, the piston rod 11 extends to the side away from the cylinder barrel, the hydraulic oil may flow from the rod cavity into the first oil pipe, then flow into the second oil pipe through the first oil pipe and enter the rodless cavity. When the piston rod 11 retracts, the hydraulic oil may flow from the rodless cavity into the second oil pipe, then flow into the first oil pipe through the second oil pipe and enter the rod cavity, thereby realizing the circulation of the hydraulic oil inside the piston assembly 3, reducing external oil pipes, making its structure more compact, and effectively avoiding external collisions that damage the oil pipes, resulting in the problem that the hydraulic oil push rod assembly cannot be supplied with oil.

[0058] It can be understood that the piston 10 can divide the cylinder into two working chambers, the end with the piston rod 11 is the rod chamber, and the end without the piston rod 11 is the rodless chamber.

[0059] The oil pipe 9 can be welded into the piston rod 11, or can be assembled into the piston rod 11 through a fixing block 48 provided on the push rod mounting block 1, and the other end can be riveted to a pipe provided in the piston rod 11 through bolts.

[0060] The oil pipe 9 may be a chrome-plated oil pipe.

[0061] The oil pipe 9 is sleeved with a spring 47 and a spring assembly 33, and the spring assembly 33 may include a spring sleeve and a spring, which can be used to fix the oil pipe 9 and maintain its stability. The spring sleeve may be a C-shaped spring sleeve, and the spring may be a C-shaped spring.

[0062] A sealing ring 30 may also be provided between the oil pipe 9 and the oil push rod assembly 2 , and the sealing ring 30 may include an O-ring and a pull rod sealing ring.

[0063] In one embodiment of the present application, a first mounting hole (not shown in the figure) and a second mounting hole (not shown in the figure) are relatively arranged on the push rod mounting block 1, the first mounting hole can be connected to the first oil pipe, the second mounting hole can be connected to the second oil pipe, a third mounting hole is connected between the first mounting hole and the second mounting hole, and first steel balls 41 for blocking both ends of the third mounting hole are respectively arranged in the first mounting hole and the second mounting hole, and plugs 42 are respectively arranged at one end of the first mounting hole and the second mounting hole away from the third mounting hole, and a first compression spring 43 is arranged between the plug 42 and the first steel ball 41.

[0064] In one embodiment of the present application, a fourth mounting hole (not shown in the figure) and a fifth mounting hole (not shown in the figure) are also provided on the push rod mounting block 1, and a second compression spring 44 is provided in the fourth mounting hole and the fifth mounting hole. A second steel ball 45 is provided at one end of the second compression spring 44, and the other end of the second compression spring 44 is assembled in the first mounting hole or the fifth mounting hole through a nut.

[0065] In the embodiment of the present application, a limiting groove 12 is provided on the oil pipe 9, and one end of the travel switch assembly 5 is provided in the limiting groove 12. When the piston assembly 3 moves to a first preset position at one end away from the push rod mounting block 1, the first limiting end 13 of the limiting groove 12 collides with the travel switch assembly 5. When the piston assembly 3 moves to a second preset position at one end close to the push rod mounting block 1, the second limiting end 14 of the limiting groove 12 collides with the travel switch assembly 5. Specifically, the oil pipe 9 is provided with a first limit block 15 and a second limit block 16, and the piston assembly 3 moves to the first preset position away from the push rod mounting block 1, that is, when the piston rod 11 moves out of the cylinder 4, the piston assembly 3 abuts against the first limit block 15 of the oil pipe 9 and drives the oil pipe 9 to move a certain distance until the first limit end 13 of the limit groove 12 collides with the travel switch assembly 5. At this time, the travel switch assembly 5 is started, and the piston rod 11 moves in the opposite direction, that is, retracts toward the inside of the cylinder 4, when the piston assembly 3 abuts against the second limit block 16 of the oil pipe 9 and drives the oil pipe 9 to retract a certain distance until the second limit end 14 of the limit groove 12 collides with the travel switch assembly 5. At this time, the travel switch assembly 5 is started, and the piston rod 11 moves out of the cylinder 4 again, and the above process is repeated to realize the reciprocating motion of the piston assembly 3.

[0066] The first stopper 15 and the second stopper 16 can be nuts or bumps. Taking a nut as an example, the first stopper 15 can be used to fix the free end of the oil pipe 9 by riveting.

[0067] In the embodiment of the present application, the new electric push rod includes: a micro switch 17 mounted on the push rod mounting block 1, and the micro switch 17 is arranged relative to the travel switch assembly 5. It can be understood that the micro switch 17 is arranged above the travel switch assembly 5. When the piston assembly 3 reciprocates, the push rod of the travel switch assembly 5 is pushed to collide with the micro switch 17 to control the movement stroke of the piston assembly 3. Specifically, a mounting groove (not shown in the figure) is provided on the push rod mounting block 1, and the micro switch 17 can be arranged in the mounting groove, and the micro switch 17 is arranged opposite to the travel switch assembly 5. When the piston assembly 3 is extending, the travel switch assembly 5 can abut against the first limit end 15 of the limit groove 14. At this time, the push rod of the travel switch assembly 5 can move upward until it touches the contact of the micro switch 17, thereby controlling the piston assembly 3 to stop extending outward and start moving in the opposite direction. Similarly, when the piston assembly 3 is retracting, the travel switch assembly 5 can abut against the second limit end 16 of the limit groove 14. At this time, the push rod of the travel switch assembly 5 can move upward again until it touches the contact of the micro switch 17, thereby controlling the piston assembly to stop retracting and start moving in the opposite direction.

[0068] In the embodiment of the present application, the new electric push rod includes: a reset component 18, one end of which is mounted on the push rod mounting block 1 and the other end is connected to the oil pipe 9. The reset component 18 is used to drive the oil pipe 9 to return to its original position when the oil pipe 9 moves. Specifically, the reset component 18 can be arranged on the side of the oil pipe 9 close to the push rod mounting block 1 and is movably connected to the oil pipe 9. When the piston assembly 3 retracts, the oil pipe 9 moves toward the side of the push rod mounting block 1 driven by the piston assembly 3. At this time, the reset component 17 is gradually in a compressed state under the push of the oil pipe 9. When the piston assembly 3 moves out of the cylinder 4, the oil pipe 9 does not continue to apply a driving force to the reset component 18. The reset component 18 returns to its original state under the action of elasticity and applies a reverse driving force to the oil pipe 9, thereby resetting the oil pipe 9 to its original position.

[0069] The reset component 18 may be an elastic reset structure such as a spring or a spring sheet.

[0070] It can be understood that each oil pipe 9 can be provided with a corresponding reset assembly 18 for resetting the corresponding oil pipe 9 .

[0071] In one embodiment of the present application, a plurality of grooves 19 are provided on the outer wall of the cylinder 4, the oil bladder 8 is assembled on the cylinder 4 by means of a rolling band 20, and the oil bladder 8 is embedded in the grooves 19 by means of a plurality of seals 21. During assembly, the oil bladder 8 is first fixed to the outer wall of the cylinder 4 by means of the rolling band 20, and since the oil bladder 8 is made of elastic material, the oil bladder 8 can be embedded in the grooves 19 by applying pressure by means of the seals 21, and at this time, the hydraulic oil in the oil bladder 8 can be prevented from entering the cylinder 4, thereby achieving sealing of the oil bladder 8.

[0072] In the embodiment of the present application, the hydraulic drive assembly 6 includes: a drive motor 22, the drive motor 22 includes a connecting shaft 23; and an integrated pump 24 that is transmission-connected to the connecting shaft 23 and is used to absorb the hydraulic oil stored in the oil tank 7. Specifically, the drive motor 22 can be assembled on the push rod mounting block 1, and the integrated pump 24 can be assembled in the drive motor 22, and the connecting shaft 23 of the drive motor can be connected to the integrated pump 24 to drive the integrated pump 24 to extract hydraulic oil from the oil tank 7 and deliver it to the oil pipe 9 through the oil circuit provided on the push rod mounting block 1.

[0073] Among them, the hydraulic drive component 6 can be detachably connected to the push rod mounting block 1, such as a threaded connection, a snap connection, etc., and the oil push rod assembly 2 can also be detachably connected to the push rod mounting block 1, such as a threaded connection, a snap connection, etc. As an implementation method, the drive motor 22 can be detachably assembled on the push rod mounting block 1 through a fixing pin 28. Similarly, the oil push rod assembly 2 can also be detachably assembled on the push rod mounting block 1 through a fixing pin 28.

[0074] In one embodiment of the present application, the integrated pump may be a gear pump, which may include a driving gear 34 and a driven gear 35, wherein the driving gear is drivingly connected to the connecting shaft 23 of the driving motor 22 to drive the driving gear 34 to rotate, and the driving gear 34 is movably connected to the driven gear 35 to drive the driven gear 35 to rotate through the driving gear 34, thereby generating a suction force to extract the hydraulic oil from the oil tank. In addition, the gear pump may be disposed in the driving motor 22 and form an integral structure with the driving motor 22, which may make its structure more compact, eliminate the need for assembly each time, reduce assembly difficulty, and effectively reduce problems such as high working noise, short life, and poor sealing.

[0075] The integrated pump 24 is also provided with a floating block 36 for sealing the integrated pump 24 to prevent the hydraulic oil from leaking out.

[0076] The integrated pump 24 is also provided with a sealing gasket 51 , which may include a skeleton sealing gasket and a rubber sealing gasket.

[0077] Among them, a rotating sealing ring 37 and a sealing and fixing assembly 38 are also arranged between the driving motor 22 and the integrated pump 24. The sealing and fixing assembly 38 may specifically include a rotating sealing sleeve, an elastic retaining ring for a hole, a sealing ring, an oil seal gasket and a cylindrical pin, so as to fix and seal the connection between the driving motor 22 and the integrated pump 24, provide rotational stability, and improve the sealing performance.

[0078] In one embodiment of the present application, a piston-type flow control valve 39 is also provided in the integrated pump 24. The piston-type flow control valve 39 may include: a piston, a compression spring, a valve core push rod, a valve core support, a valve core sealing gasket, a valve sleeve and a sealing ring. The valve core push rod can be connected to the piston, and the compression spring is compressed by the piston to convert the control pressure of the valve into the displacement of the valve core, thereby realizing the stable flow of the hydraulic oil and avoiding turbulence.

[0079] Wherein, the sealing ring can be an O-ring.

[0080] In one embodiment of the present application, a pressure regulating assembly 40 is also provided in the integrated pump 24. The pressure regulating assembly may include a plug, a compression spring, a sealing ring and a pressure regulating rod. The plug is transmission-connected to the pressure regulating rod of the integrated pump. The compression spring may be mounted on the pressure regulating rod. The plug is pushed by the rotation of the pressure regulating rod to achieve a small pressure adjustment of the inner cavity of the pump body to prevent excessive pressure from affecting the normal operation of the gear pump.

[0081] Wherein, the sealing ring can be an O-ring.

[0082] In the embodiment of the present application, the novel electric push rod includes: a filter 25 disposed between the hydraulic drive assembly 6 and the oil bag 8, which is used to filter the hydraulic oil sucked from the oil bag 8 and transmit it to the oil push rod assembly 2. Specifically, the integrated pump 24 can be connected to the oil tank. When the integrated pump 24 is working, the integrated pump 24 can extract the hydraulic oil stored in the oil bag 8 for use by the piston assembly 3. In order to prevent the presence of impurities in the hydraulic oil from clogging or damaging the piston assembly 3, the hydraulic oil can be first filtered through the filter screen of the filter 25 to reduce the impurity content.

[0083] The filter 25 can be mounted on a valve at the hydraulic oil outlet of the oil tank 7 to filter the extracted hydraulic oil. The filter 25 can be an oil suction filter cap.

[0084] In one embodiment of the present application, the new electric push rod includes: a control panel arranged on the rear end cover of the hydraulic drive component 6, and a control connector 26 is provided on the control panel; a temperature control device (not shown in the figure) electrically connected to the control panel, which is used to control the hydraulic drive component 6 to shut down when the temperature of the hydraulic drive component 6 is greater than a preset temperature.

[0085] Specifically, the control board may be a PCB circuit board, on which a controller, a control circuit and a power line are arranged. The controller may be connected to various control components, such as the piston assembly 3, the hydraulic drive assembly 6, etc., through the control circuit, and may be used to control the start and stop of the hydraulic drive assembly 6, the motion power, and the extension and retraction of the piston assembly 3. For example, the control joint 26 may include a common joint, an extension joint and a retraction joint. When the common joint is docked with the extension joint, an extension operation is performed, and when the common joint is docked with the retraction joint, a retraction operation is performed.

[0086] The control joint 26 may be an aviation joint.

[0087] The controller may be a control chip such as an MCU or a single-chip microcomputer.

[0088] Among them, the temperature control device may include a temperature sensor, which can be arranged on components such as the drive motor 22 and the piston assembly 3 that need to detect the temperature, and transmit the detected temperature to the controller in real time. Then, when the temperature reaches the limit value, for example, greater than or equal to 80 degrees, the power can be automatically cut off to avoid damage to the new electric push rod and increase its service life.

[0089] The control panel is also provided with a power supply module 27 for connecting an external power supply module to supply power to the new electric push rod.

[0090] The controller is also equipped with an overload protection function, and different currents can be set according to the models and thrust limits of different new electric push rods.

[0091] In the embodiment of the present application, thread fastening glue may be applied to the threaded connection position, and the tightening torque reaches the tightening torque of the corresponding thread specification.

[0092] In the embodiment of the present application, the oil push rod assembly is integrated with the hydraulic drive component through the push rod mounting block, which can realize oil supply and hydraulic lifting function, and can make its structure more compact, without the need for assembly every time, which can reduce the difficulty of assembly, and can provide greater driving force, which can generally reach or exceed 1000KG, and has strong impact resistance, which can effectively reduce the problems of high working noise, short life, and poor sealing. In addition, by setting the travel switch assembly, the stroke of the piston assembly can be better and more accurately controlled to improve working stability.

[0093] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of electric push rod, characterized in that: The novel electric push rod comprises: Push rod mounting block; An oil push rod assembly mounted on the push rod mounting block, the oil push rod assembly comprising a piston assembly and a cylinder barrel, the piston assembly being mounted in the cylinder barrel and performing reciprocating motion in the cylinder barrel by hydraulic force; A travel switch assembly mounted on the push rod mounting block and used to control the movement stroke of the piston assembly; a hydraulic drive assembly mounted on the push rod mounting block; An oil tank is mounted on the push rod mounting plate, wherein an oil bag for storing hydraulic oil is arranged in the oil tank, and the oil bag is communicated with the hydraulic drive assembly so that the hydraulic oil stored in the oil bag is delivered to the oil push rod assembly under the drive of the hydraulic drive assembly.

2. The new electric push rod as claimed in claim 1, characterized in that: The novel electric push rod comprises: An oil pipe is mounted on the push rod mounting block and embedded in the cylinder barrel. One end of the oil pipe close to the push rod mounting block is connected to the hydraulic drive assembly through an oil circuit so as to transport the hydraulic oil to the piston assembly.

3. The new electric push rod as claimed in claim 2, characterized in that: A limiting groove is provided on the oil pipe, and one end of the travel switch assembly is provided in the limiting groove. When the piston assembly moves to a first preset position toward an end away from the push rod mounting block, the first limiting end of the limiting groove collides with the travel switch assembly. When the piston assembly moves to a second preset position toward an end close to the push rod mounting block, the second limiting end of the limiting groove collides with the travel switch assembly.

4. The new electric push rod as claimed in claim 3 is characterized in that: The novel electric push rod comprises: A reset component is assembled on the push rod mounting block at one end and connected to the oil pipe at the other end. The reset component is used to drive the oil pipe to return to its original position when the oil pipe moves.

5. The new electric linear actuator according to claim 1, characterized in that: The novel electric push rod comprises: A micro switch is mounted on the push rod mounting block, and the micro switch is arranged opposite to the travel switch assembly. When the piston assembly reciprocates, the push rod of the travel switch assembly is pushed to collide with the micro switch to control the movement stroke of the piston assembly.

6. The new electric linear actuator according to claim 1, characterized in that: A plurality of grooves are arranged on the outer wall of the cylinder barrel, the oil bag is assembled on the cylinder barrel by rolling, and the oil bag is embedded in the grooves by a plurality of sealing members.

7. The new electric linear actuator as claimed in claim 1, characterized in that: The hydraulic drive assembly comprises: A drive motor, wherein the drive motor comprises a connecting shaft; An integrated pump is drivingly connected to the connecting shaft and is used to absorb the hydraulic oil stored in the oil tank.

8. The new electric linear actuator as claimed in claim 1, characterized in that: The novel electric push rod comprises: A control panel disposed on the rear end cover of the hydraulic drive assembly, wherein the control panel is provided with a control joint; The temperature control device electrically connected to the control panel is used to control the hydraulic drive component to shut down when the temperature of the hydraulic drive component is greater than a preset temperature.

9. The new electric linear actuator as claimed in claim 1, characterized in that: The piston assembly comprises: a piston disposed in the cylinder; A piston rod is disposed in the cylinder and connected to the piston, and the piston rod is used for reciprocating motion in the cylinder.

10. The new electric linear actuator according to claim 1, characterized in that: The novel electric push rod comprises: The filter disposed between the hydraulic drive assembly and the oil bag is used to filter the hydraulic oil sucked from the oil bag and transmit the filtered hydraulic oil to the oil push rod assembly.

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