Hydraulic straight stroke actuating mechanism

Abstract

The utility model provides a hydraulic straight stroke actuating mechanism, which relates to the technical field of actuating mechanisms and comprises a rear cylinder, a front cylinder and a telescopic rod, a left oil groove is arranged on the left side of the rear cylinder, a right oil groove is arranged on the right side of the rear cylinder, a middle channel is arranged between the left oil groove and the right oil groove, and a rear oil cavity is arranged in the rear cylinder. A front cylinder is arranged on the front side of the rear cylinder, a middle fixing plate is arranged at the rear end of the front cylinder, a front oil cavity is formed in the front cylinder, a telescopic rod is movably arranged in the front oil cavity in a telescopic mode, a front fixing plate is arranged at the front end of the front cylinder, a left channel is formed in the left portion of the front fixing plate, and a right channel is formed in the right portion of the front fixing plate. And a lead screw is mounted at the upper end of the first motor, and a rear piston plate is movably connected to the lead screw. Forward and reverse extrusion movement is carried out through hydraulic pressure, so that the telescopic rod is rapidly pushed to execute operation, the direction is kept straight and stable in the execution process, and use is safer and more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of actuators, in particular to a hydraulic linear actuator. Background Art

[0002] In the specification of an electro-hydraulic integrated linear actuator in the prior art (publication number CN208793372U), it is mentioned that "the total oil circuit includes a manual oil circuit and an automatic oil circuit in parallel, and the oil outlet ends of the total oil circuit are respectively connected to the double-rod hydraulic cylinder chambers; the automatic oil circuit includes a two-way oil pump, a servo motor, a safety relief valve and a hydraulic control flow valve, the two-way oil pump is driven by a servo motor, and the oil outlets of the two-way oil pump are respectively connected to the oil outlet ends of the total oil circuit through the hydraulic control flow valve, and the two-way oil pump is connected to the oil tank through the safety relief valve; the manual oil circuit includes a manual reversing valve and a manual pump, the oil inlet of the manual pump is connected to the oil tank, and the oil outlet of the manual pump is connected to the oil outlet end of the total oil circuit through the manual reversing valve". However, the oil extrusion of the linear actuator in the prior art is not stable, and the direction of execution activity may be offset, affecting the accuracy and reliability of its execution. Utility Model Content

[0003] In order to overcome the defects of the existing technology, a hydraulic linear actuator is now provided to solve the problems in the existing technology that the oil extrusion of the linear actuator is unstable and the direction of execution activity may be offset, affecting the accuracy and reliability of its execution.

[0004] To achieve the above-mentioned purpose, a hydraulic linear actuator is provided, including a rear cylinder, a front cylinder and a telescopic rod, a left oil groove is provided on the left side of the rear cylinder, and a right oil groove is provided on the right side of the rear cylinder, and a middle channel is provided between the left oil groove and the right oil groove, and a rear oil chamber is opened in the rear cylinder, a front cylinder is provided on the front side of the rear cylinder, and a middle fixed plate is provided at the rear end of the front cylinder, a front oil chamber is opened in the front cylinder, and a telescopic rod is telescopically movable in the front oil chamber, a front fixed plate is provided at the front end of the front cylinder, and a left channel is opened on the left part of the front fixed plate, and a right channel is opened on the right part of the front fixed plate.

[0005] Furthermore, a first motor is provided at the rear end center of the rear cylinder, and a screw rod is installed at the upper end of the first motor, and the rear piston plate is movably connected to the screw rod.

[0006] Furthermore, a first inlet is provided on the front side of the left oil tank, and a second outlet is provided on the left side of the left channel, and a first connecting pipe is connected between the first inlet and the second outlet, and a first electromagnetic control valve is installed on the first connecting pipe.

[0007] Furthermore, a first outlet is provided on the front side of the right oil tank, and a second inlet is provided on the right side of the right channel. A second connecting pipe is connected between the first outlet and the second inlet, and a second electromagnetic control valve is installed on the second connecting pipe.

[0008] Furthermore, a connecting port is provided in the middle of the rear side surface of the middle fixing plate, the rear end of the connecting port is connected to the center of the front side surface of the rear cylinder, and rear support plates are fixed between the left and right parts of the middle fixing plate and the left oil tank and the right oil tank, and a front support rod is fixed between the left and right parts of the middle fixing plate and the front fixing plate.

[0009] Furthermore, a front end head is provided on the front side of the telescopic rod, and a pressure plate is provided on the front side of the front end head, and the telescopic rod can move forward and backward.

[0010] Furthermore, guide rods are provided on both the left and right parts of the front oil chamber, and a front piston plate is fixed to the rear end of the telescopic rod. The left and right parts of the front piston plate are respectively sleeved on the outside of the guide rods on both sides, and a rear insert head is provided at the rear end of the front piston plate.

[0011] The beneficial effects of the present invention are:

[0012] 1. In the present invention, when the oil in the rear oil chamber is pushed into the front oil chamber, the oil in the front oil chamber can push the telescopic rod straight out. At this time, the oil previously in the front oil chamber is transported to the left oil tank through the second outlet, the first connecting pipe, and the first inlet; at this time, the left oil tank is connected to the right oil tank through the middle channel; conversely, after the oil in the right oil tank is transported to the front oil chamber through the first outlet, the second connecting pipe, and the second inlet, the telescopic rod will be pushed back, and the oil at the rear end of the front piston plate in the front oil chamber will also be squeezed back into the rear oil chamber, returning to its initial state.

[0013] 2. In the present invention, the first motor rotates the screw rod clockwise to drive the rear piston plate to move straight forward, which can push the oil in the rear oil chamber to flow forward; while rotating the screw rod counterclockwise will drive the rear piston plate to move backward, and the squeezed oil will flow back, making the operation faster and more convenient.

[0014] 3. The left and right parts of the front piston plate of the utility model are respectively sleeved on the guide rod on the same side, so that the telescopic rod can remain straight and stable when it moves in and out of the front oil chamber, making its execution direction accurate, reliable, safe and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic top view of an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the telescopic rod in the front cylinder of the embodiment of the utility model before it is extended;

[0017] Figure 3This is a schematic diagram of the telescopic rod in the front cylinder of the embodiment of the utility model after being extended;

[0018] Figure 4 It is a front view schematic diagram of an embodiment of the utility model.

[0019] In the figure: 1. rear cylinder; 10. rear oil chamber; 11. screw; 12. first motor; 13. left oil tank; 14. middle channel; 15. right oil tank; 16. first inlet; 17. first connecting pipe; 18. first outlet; 19. second connecting pipe; 100. first solenoid control valve; 101. second solenoid control valve; 102. rear piston plate; 103. rear support plate; 2. front cylinder; 20. front oil chamber; 21. guide rod; 22. front support rod; 23. middle fixed plate; 24. connecting port; 25. front fixed plate; 26. left channel; 27. second outlet; 28. right channel; 29. second inlet; 3. telescopic rod; 30. front end head; 31. pressure plate; 32. front piston plate; 33. rear insert head. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Specific details such as specific system structures and technologies are proposed in order to more thoroughly understand the embodiments of the present invention. The described embodiments are part of the embodiments of the present disclosure, not all of them. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present disclosure.

[0021] The specific implementation of the present utility model will be described in detail below with reference to the accompanying drawings.

[0022] Figure 1 A schematic top view of an embodiment of the present invention, Figure 2 This is a schematic diagram of the telescopic rod in the front cylinder of the embodiment of the utility model being extended. Figure 3 Schematic diagram of the telescopic rod in the front cylinder of the embodiment of the utility model after being extended and Figure 4 It is a front view schematic diagram of an embodiment of the utility model.

[0023] Reference Figures 1 to 4As shown, the utility model provides a hydraulic linear actuator, including a rear cylinder 1, a front cylinder 2 and a telescopic rod 3, a left oil groove 13 is provided on the left side of the rear cylinder 1, and a right oil groove 15 is provided on the right side of the rear cylinder 1, and a middle channel 14 is provided between the left oil groove 13 and the right oil groove 15, the front side of the rear cylinder 1 is provided with the front cylinder 2, and the rear end of the front cylinder 2 is provided with a middle fixed plate 23, a front oil chamber 20 is provided in the front cylinder 2, and the telescopic rod 3 is telescopically movable in the front oil chamber 20, a front fixed plate 25 is provided at the front end of the front cylinder 2, and a left channel 26 is provided on the left part of the front fixed plate 25, and a right channel 28 is provided on the right part of the front fixed plate 25.

[0024] In this embodiment, a first motor 12 is provided at the rear end center of the rear cylinder 1, and a screw rod 11 is installed at the upper end of the first motor 12, and a rear piston plate 102 is movably connected to the screw rod 11; a first inlet 16 is provided on the front side of the left oil groove 13, and a second outlet 27 is provided on the left side of the left channel 26, and a first connecting pipe 17 is connected between the first inlet 16 and the second outlet 27, and a first electromagnetic control valve 100 is installed on the first connecting pipe 17; a first outlet 18 is provided on the front side of the right oil groove 15, and a second inlet 29 is provided on the right side of the right channel 28, a second connecting pipe 19 is connected between the first outlet 18 and the second inlet 29, and a second electromagnetic control valve 101 is installed on the second connecting pipe 19.

[0025] As a preferred embodiment, in the present invention, when the oil in the rear oil chamber 10 is pushed into the front oil chamber 20, the oil in the front oil chamber 20 can push the telescopic rod 3 straight out. At this time, the oil in the front oil chamber 20 is transported to the left oil groove 13 through the second outlet 27, the first connecting pipe 17, and the first inlet 16; at this time, the left oil groove 13 is connected with the right oil groove 15 through the middle channel 14; conversely, after the oil in the right oil groove 15 is transported to the front oil chamber 20 through the first outlet 18, the second connecting pipe 19 and the second inlet 29, the telescopic rod 3 will be pushed back, and the oil at the rear end of the front piston plate 32 in the front oil chamber 20 will also be squeezed back into the rear oil chamber 10, returning to its initial state.

[0026] In this embodiment, a connecting port 24 is provided in the middle of the rear side surface of the middle fixing plate 23, and the rear end of the connecting port 24 is connected to the center of the front side surface of the rear cylinder 1. Rear support plates 103 are fixed between the left and right parts of the middle fixing plate 23 and the left oil groove 13 and the right oil groove 15, and a front support rod 22 is fixed between the left and right parts of the middle fixing plate 23 and the front fixing plate 25.

[0027] As a preferred embodiment, the utility model drives the rear piston plate 102 to move straight forward by rotating the screw rod 11 clockwise through the first motor 12, which can push the oil in the rear oil chamber 10 to flow forward; while rotating the screw rod 11 counterclockwise will drive the rear piston plate 102 to move backward, and the squeezed oil will flow back, making the operation faster and more convenient.

[0028] In this embodiment, a front end head 30 is provided on the front side of the telescopic rod 3, and a pressure plate 31 is provided on the front side of the front end head 30, and the telescopic rod 3 moves forward and backward; guide rods 21 are provided on both the left and right parts of the front oil chamber 20, and a front piston plate 32 is fixed to the rear end of the telescopic rod 3, and the left and right parts of the front piston plate 32 are respectively sleeved on the outside of the guide rods 21 on both sides, and a rear insert head 33 is provided at the rear end of the front piston plate 32.

[0029] As a preferred embodiment, the left and right parts of the front piston plate 32 of the utility model are respectively mounted on the guide rod 21 on the same side, so that the telescopic rod 3 can remain straight and stable when it is extended and retracted into and out of the front oil chamber 20, making its execution direction accurate, reliable, safe and stable.

[0030] The utility model can effectively solve the problems in the prior art of unstable oil extrusion of linear actuators, possible deviation in the direction of execution activity, and affecting the accuracy and reliability of their execution. The utility model uses hydraulic pressure to perform forward and reverse extrusion activities, thereby quickly pushing the telescopic rod to execute the operation, maintaining a straight and stable direction during the execution process, and being safer and more reliable to use.

[0031] The above embodiments are used to illustrate the present invention rather than to limit the present invention. Any modifications and changes made to the present invention within the spirit of the present invention and the scope of the claims for protection shall be included in the scope of protection of the present invention.

Claims

1. A hydraulic linear actuator, characterized by: The invention comprises a rear cylinder (1), a front cylinder (2) and a telescopic rod (3), wherein a left oil groove (13) is provided on the left side of the rear cylinder (1), a right oil groove (15) is provided on the right side of the rear cylinder (1), and a middle channel (14) is provided between the left oil groove (13) and the right oil groove (15), and a rear oil chamber (10) is provided in the rear cylinder (1), a front cylinder (2) is provided on the front side of the rear cylinder (1), and a middle fixing plate (23) is provided at the rear end of the front cylinder (2), a front oil chamber (20) is provided in the front cylinder (2), and a telescopic rod (3) is telescopically movable in the front oil chamber (20), a front fixing plate (25) is provided at the front end of the front cylinder (2), a left channel (26) is provided on the left part of the front fixing plate (25), and a right channel (28) is provided on the right part of the front fixing plate (25).

2. A hydraulic linear actuator according to claim 1, characterized in that: A first motor (12) is provided at the rear end center of the rear cylinder (1), a screw rod (11) is installed at the upper end of the first motor (12), and a rear piston plate (102) is movably connected to the screw rod (11).

3. The hydraulic linear actuator according to claim 1, characterized in that: A first inlet (16) is provided on the front side of the left oil tank (13), and a second outlet (27) is provided on the left side of the left channel (26). A first connecting pipe (17) is connected between the first inlet (16) and the second outlet (27), and a first electromagnetic control valve (100) is installed on the first connecting pipe (17).

4. The hydraulic linear actuator according to claim 1, characterized in that: A first outlet (18) is provided on the front side of the right oil tank (15), and a second inlet (29) is provided on the right side of the right channel (28). A second connecting pipe (19) is connected between the first outlet (18) and the second inlet (29), and a second electromagnetic control valve (101) is installed on the second connecting pipe (19).

5. The hydraulic linear actuator according to claim 1, characterized in that: A connecting port (24) is provided in the middle of the rear side surface of the middle fixing plate (23), and the rear end of the connecting port (24) is connected to the center of the front side surface of the rear cylinder (1). Rear support plates (103) are fixed between the left and right parts of the middle fixing plate (23) and the left oil groove (13) and the right oil groove (15), and a front support rod (22) is fixed between the left and right parts of the middle fixing plate (23) and the front fixing plate (25).

6. The hydraulic linear actuator according to claim 1, characterized in that: The front side of the telescopic rod (3) is provided with a front end head (30), and the front side of the front end head (30) is provided with a pressing plate (31), and the telescopic rod (3) is movable forward and backward.

7. The hydraulic linear actuator according to claim 1, characterized in that: Guide rods (21) are provided on both the left and right parts of the front oil chamber (20), and a front piston plate (32) is fixed to the rear end of the telescopic rod (3). The left and right parts of the front piston plate (32) are respectively sleeved outside the guide rods (21) on both sides, and a rear insert (33) is provided at the rear end of the front piston plate (32).

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