Single-rod electro-hydraulic direct-drive servo cylinder device

Abstract

The utility model discloses a single-rod electro-hydraulic direct-drive servo cylinder device which comprises a servo cylinder body and a connecting pipe arranged on the front side of the servo cylinder body. When the single-outlet-rod electro-hydraulic direct-drive servo cylinder device is used, the oil inlet pipe is connected with an external pipeline firstly, then the motor body is started, the motor body works to drive the gear to rotate through the output shaft so as to drive the hydraulic pump body to work, and the hydraulic pump body works to suck oil into the hydraulic pump body through the oil inlet pipe; after jacking is finished, oil flows back to a hydraulic pump body through the oil inlet hole, and at the moment, the hydraulic rod is reset through a reset spring; the sealing rings and the sealing gaskets which are installed on the outer side and the rear side of the piston and the sealing rings on the inner side of the connecting pipe can prevent oil from flowing out through the connecting pipe, and the sealing performance of the single-rod electro-hydraulic direct-drive servo cylinder device is enhanced through the arrangement of the sealing rings, the sealing gaskets and the sealing rings.

Description

Technical Field

[0001] The utility model belongs to the technical field related to electro-hydraulic servo cylinders, and in particular relates to a single-rod electro-hydraulic direct-drive servo cylinder device. Background Art

[0002] The single-rod electro-hydraulic direct-drive servo cylinder device is an electro-hydraulic servo system, which outputs control signals through the servo motor to drive the hydraulic valve to control the oil in and out of the single-rod cylinder, thereby realizing linear motion. This system is widely used in the field of industrial automation control due to its high adjustment accuracy and fast response speed, such as material loading and unloading, casting machinery, lifting machinery, mold processing, etc. The existing single-rod electro-hydraulic direct-drive servo cylinder device is mainly composed of a motor box, a mounting plate, a connecting plate, a hydraulic rod, a servo cylinder body, an oil inlet pipe, an oil inlet hole, a reset spring, a piston, a liquid pump box and other components. The existing single-rod electro-hydraulic direct-drive servo cylinder device has poor sealing when in use, which will affect the normal use of the single-rod electro-hydraulic direct-drive servo cylinder device, so a single-rod electro-hydraulic direct-drive servo cylinder device is indispensable. Utility Model Content

[0003] The purpose of the utility model is to provide a single-rod electro-hydraulic direct-drive servo cylinder device to solve the problem in the above background technology that the existing single-rod electro-hydraulic direct-drive servo cylinder device has poor sealing performance during use, which affects the normal use of the single-rod electro-hydraulic direct-drive servo cylinder device.

[0004] To achieve the above purpose, the utility model provides the following technical solutions: a single-rod electro-hydraulic direct-drive servo cylinder device, comprising

[0005] A servo cylinder body and a connecting pipe arranged at the front side of the servo cylinder body;

[0006] A mounting plate is connected to the rear side of the servo cylinder body, and a connecting plate is arranged at the rear side of the mounting plate;

[0007] A liquid pump box is connected to the rear side of the connecting plate, an oil inlet pipe is installed at the right side of the liquid pump box, and a motor box is installed at the upper end of the liquid pump box;

[0008] A hydraulic rod is arranged inside the servo cylinder body and at the front side of the connecting pipe, a piston is arranged at the rear side of the hydraulic rod, and a return spring is installed at the rear side of the connecting pipe and at the front side of the piston;

[0009] Oil inlet holes are arranged inside the rear side of the servo cylinder body and at positions corresponding to the mounting plate and the connecting plate;

[0010] A sealing ring is installed on the inner side of the connecting pipe and at the outer side of the hydraulic rod, a second placement groove is provided at the outer side of the piston, a sealing ring is installed at the inner position of the second placement groove, a first placement groove is provided at the rear side of the piston, and a sealing gasket is installed at the inner position of the first placement groove. The sealing performance of the single-rod electro-hydraulic direct-drive servo cylinder device is enhanced by the arrangement of the sealing ring, the sealing ring and the sealing gasket.

[0011] Preferably, a fixing pipe is connected to the front of the piston and located outside the hydraulic rod, and the hydraulic rod and the connecting pipe are connected by plugging.

[0012] Preferably, the inner wall of the fixed tube and the front inner wall of the servo cylinder body are both provided with internal threads, and the rear outer wall of the hydraulic rod and the outer wall of the connecting tube are both provided with external threads.

[0013] Preferably, the fixed tube and the hydraulic rod, and the servo cylinder body and the connecting tube are connected via threads. The provision of the fixed tube and the connecting tube enhances the convenience of installation and disassembly of the single-rod electro-hydraulic direct-drive servo cylinder device.

[0014] Preferably, a motor body is installed at an internal position of the motor box, a hydraulic pump body is installed at an internal position of the liquid pump box, and the motor body is electrically connected to an external power source.

[0015] Preferably, the motor body and the hydraulic pump body are both installed transversely, and the motor body and the hydraulic pump body are connected by gear meshing.

[0016] Preferably, the liquid pump box and the connecting plate, the servo cylinder body and the mounting plate are all integrated structures, and the mounting plate and the connecting plate are both made of stainless steel.

[0017] Preferably, the mounting plate and the connecting plate are fixedly connected by means of a fastening nut. The arrangement of the mounting plate and the connecting plate enhances the convenience of connecting the liquid pump box and the servo cylinder body.

[0018] Compared with the prior art, the utility model provides a single-rod electro-hydraulic direct-drive servo cylinder device, which has the following beneficial effects:

[0019] 1. In the single-rod electro-hydraulic direct-drive servo cylinder device, when using the single-rod electro-hydraulic direct-drive servo cylinder device, first connect the oil inlet pipe to the external pipeline, then connect the motor body to the external power supply, and then start the motor body. The motor body will drive the gear to rotate through the output shaft to drive the hydraulic pump body to work. The hydraulic pump body will suck the oil into the hydraulic pump body through the oil inlet pipe, and then enter the servo cylinder body through the oil inlet hole, so that the hydraulic rod is lifted. When the lifting is completed, the oil flows back to the hydraulic pump body through the oil inlet hole. At this time, the hydraulic rod is reset by the reset spring, and the sealing ring and sealing gasket installed on the outside and rear side of the piston and the sealing ring on the inside of the connecting pipe prevent the oil from flowing out through the connecting pipe. The sealing of the single-rod electro-hydraulic direct-drive servo cylinder device is enhanced by the setting of the sealing ring, sealing ring and sealing gasket, so that the single-rod electro-hydraulic direct-drive servo cylinder device can be better used.

[0020] 2. In the single-rod electro-hydraulic direct-drive servo cylinder device, when using the single-rod electro-hydraulic direct-drive servo cylinder device, first connect the fixed tube to the hydraulic rod through threads, so that the piston is installed on the rear side of the hydraulic rod, and then put the connecting tube on the outside of the hydraulic rod, and then connect the piston to the hydraulic rod through a return spring, and then insert the piston into the interior of the servo cylinder body, and then connect the connecting tube to the servo cylinder body through threads. The setting of the fixed tube and the connecting tube enhances the convenience of installation and disassembly of the single-rod electro-hydraulic direct-drive servo cylinder device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the single-rod electro-hydraulic direct-drive servo cylinder device of the utility model.

[0022] Figure 2 It is a schematic diagram of the internal structure of the single-rod electro-hydraulic direct-drive servo cylinder device of the utility model.

[0023] Figure 3 It is a schematic structural diagram of an enlarged piston of a single-rod electro-hydraulic direct-drive servo cylinder device of the utility model.

[0024] In the figure: 1. Motor box; 2. Mounting plate; 3. Connecting pipe; 4. Hydraulic rod; 5. Servo cylinder body; 6. Connecting plate; 7. Oil inlet pipe; 8. Oil inlet hole; 9. Sealing ring; 10. Return spring; 11. Sealing ring; 12. Fixed pipe; 13. Piston; 14. Sealing pad; 15. First placement groove; 16. Second placement groove; 17. Liquid pump box. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides Figure 1-3 The single-rod electro-hydraulic direct-drive servo cylinder device shown in the figure is a single-rod electro-hydraulic direct-drive servo cylinder device, comprising a servo cylinder body 5 and a connecting pipe 3 arranged at the front side of the servo cylinder body 5; a mounting plate 2 is connected to the rear side of the servo cylinder body 5, and a connecting plate 6 is arranged at the rear side of the mounting plate 2; a liquid pump box 17 is connected to the rear side of the connecting plate 6, an oil inlet pipe 7 is installed at the right side of the liquid pump box 17, and a motor box 1 is installed at the upper end of the liquid pump box 17; a hydraulic rod 4 is arranged inside the servo cylinder body 5 and at the front side of the connecting pipe 3, a piston 13 is arranged at the rear side of the hydraulic rod 4, and a piston 13 is arranged at the rear side of the connecting pipe 3 and at the rear side of the connecting pipe 3. A return spring 10 is installed at the front side of the piston 13; oil inlet holes 8 are arranged inside the rear side of the servo cylinder body 5 and at corresponding positions of the mounting plate 2 and the connecting plate 6; a sealing ring 11 is installed on the inner side of the connecting pipe 3 and at the outer side of the hydraulic rod 4, a second placement groove 16 is arranged at the outer side of the piston 13, a sealing ring 9 is installed at the inner position of the second placement groove 16, a first placement groove 15 is arranged at the rear side of the piston 13, a sealing gasket 14 is installed at the inner position of the first placement groove 15, and the sealing performance of the single-rod electro-hydraulic direct-drive servo cylinder device is enhanced by the arrangement of the sealing ring 11, the sealing ring 9 and the sealing gasket 14.

[0027] like Figure 1 , Figure 2 and Figure 3As shown, in order to enhance the sealing performance of the single-rod electro-hydraulic direct-drive servo cylinder device, when using the single-rod electro-hydraulic direct-drive servo cylinder device, first connect the oil inlet pipe 7 to the external pipeline, then connect the motor body to the external power supply, and then start the motor body. The motor body will drive the gear to rotate through the output shaft to drive the hydraulic pump body to work. The hydraulic pump body will suck the oil into the hydraulic pump body through the oil inlet pipe 7, and then enter the servo cylinder body 5 through the oil inlet hole 8, so that the hydraulic rod 4 is lifted. After the lifting is completed, the oil flows back to the hydraulic pump body through the oil inlet hole 8. At this time, the hydraulic rod 4 is reset by the reset spring 10, and the sealing ring 9 and the sealing gasket 14 installed on the outside and rear side of the piston 13 and the sealing ring 11 on the inside of the connecting pipe 3 will prevent the oil from flowing out through the connecting pipe 3. The sealing performance of the single-rod electro-hydraulic direct-drive servo cylinder device is enhanced by the arrangement of the sealing ring 11, the sealing ring 9 and the sealing gasket 14, so that the single-rod electro-hydraulic direct-drive servo cylinder device can be better used.

[0028] A fixed tube 12 is connected to the front of the piston 13 and located at the outer side of the hydraulic rod 4. The hydraulic rod 4 and the connecting tube 3 are connected by plugging. The inner wall of the fixed tube 12 and the front inner wall of the servo cylinder body 5 are provided with internal threads, and the rear outer wall of the hydraulic rod 4 and the outer wall of the connecting tube 3 are provided with external threads. The fixed tube 12 and the hydraulic rod 4, and the servo cylinder body 5 and the connecting tube 3 are connected by threads. The arrangement of the fixed tube 12 and the connecting tube 3 enhances the convenience of installation and disassembly of the single-rod electro-hydraulic direct-drive servo cylinder device.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, in order to enhance the convenience of installation and disassembly of the single-rod electro-hydraulic direct-drive servo cylinder device, when using the single-rod electro-hydraulic direct-drive servo cylinder device, first, the fixing tube 12 is connected to the hydraulic rod 4 by threads, so that the piston 13 is installed on the rear side of the hydraulic rod 4, and then the connecting tube 3 is sleeved on the outside of the hydraulic rod 4, and then the piston 13 is connected to the hydraulic rod 4 by the return spring 10, and then the piston 13 is inserted into the interior of the servo cylinder body 5, and then the connecting tube 3 is connected to the servo cylinder body 5 by threads. Through the arrangement of the fixing tube 12 and the connecting tube 3, the convenience of installation and disassembly of the single-rod electro-hydraulic direct-drive servo cylinder device is enhanced.

[0030] A motor body is installed at an internal position of the motor box 1, and a hydraulic pump body is installed at an internal position of the liquid pump box 17. The motor body is electrically connected to an external power supply. The motor body and the hydraulic pump body are both installed horizontally. The motor body and the hydraulic pump body are connected by gear meshing. The liquid pump box 17 and the connecting plate 6, the servo cylinder body 5 and the mounting plate 2 are all integrated structures. The mounting plate 2 and the connecting plate 6 are both made of stainless steel. The mounting plate 2 and the connecting plate 6 are fixedly connected by fastening nuts. The arrangement of the mounting plate 2 and the connecting plate 6 enhances the convenience of connecting the liquid pump box 17 with the servo cylinder body 5.

[0031] like Figure 1 As shown, in order to enhance the convenience of connecting the liquid pump box 17 with the servo cylinder body 5, when using a single-rod electro-hydraulic direct-drive servo cylinder device, first connect the servo cylinder body 5 with the mounting plate 2, then connect the liquid pump box 17 with the connecting plate 6, and then dock the mounting plate 2 with the connecting plate 6 so that the mounting hole inside the mounting plate 2 is aligned with the connecting hole inside the connecting plate 6, and then fix the mounting plate 2 with the connecting plate 6 by fastening nuts. By setting the mounting plate 2 and the connecting plate 6, the convenience of connecting the liquid pump box 17 with the servo cylinder body 5 is enhanced.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A single-rod electro-hydraulic direct-drive servo cylinder device, comprising: A servo cylinder body (5) and a connecting pipe (3) arranged at the front side of the servo cylinder body (5); A mounting plate (2) is connected to the rear side of the servo cylinder body (5), and a connecting plate (6) is provided at the rear side of the mounting plate (2); A liquid pump box (17) is connected to the rear side of the connecting plate (6), an oil inlet pipe (7) is installed at the right side of the liquid pump box (17), and a motor box (1) is installed at the upper end of the liquid pump box (17); A hydraulic rod (4) is arranged inside the servo cylinder body (5) and at a front side position of the connecting pipe (3); a piston (13) is arranged at a rear side position of the hydraulic rod (4); and a return spring (10) is installed at a rear side of the connecting pipe (3) and at a front side position of the piston (13); Oil inlet holes (8) are provided inside the rear side of the servo cylinder body (5) and at positions corresponding to the mounting plate (2) and the connecting plate (6); Features: A sealing ring (11) is installed on the inner side of the connecting pipe (3) and at the outer side of the hydraulic rod (4); a second placement groove (16) is provided at the outer side of the piston (13); a sealing ring (9) is installed at the inner side of the second placement groove (16); a first placement groove (15) is provided at the rear side of the piston (13); a sealing gasket (14) is installed at the inner side of the first placement groove (15); and the sealing ring (11), the sealing ring (9) and the sealing gasket (14) are provided to enhance the sealing performance of the single-rod electro-hydraulic direct-drive servo cylinder device.

2. A single-rod electro-hydraulic direct-drive servo cylinder device according to claim 1, Features: A fixed pipe (12) is connected to the front of the piston (13) and located outside the hydraulic rod (4), and the hydraulic rod (4) and the connecting pipe (3) are connected by plugging.

3. A single-rod electro-hydraulic direct-drive servo cylinder device according to claim 2, Features: Internal threads are provided on the inner wall of the fixed tube (12) and the front inner wall of the servo cylinder body (5), and external threads are provided on the rear outer wall of the hydraulic rod (4) and the outer wall of the connecting tube (3).

4. A single-rod electro-hydraulic direct-drive servo cylinder device according to claim 3, Features: The fixing pipe (12) and the hydraulic rod (4), and the servo cylinder body (5) and the connecting pipe (3) are connected via threads. The arrangement of the fixing pipe (12) and the connecting pipe (3) enhances the convenience of installation and disassembly of the single-rod electro-hydraulic direct-drive servo cylinder device.

5. The single-rod electro-hydraulic direct-drive servo cylinder device according to claim 1, Features: A motor body is installed at an internal position of the motor box (1), a hydraulic pump body is installed at an internal position of the liquid pump box (17), and the motor body is electrically connected to an external power source.

6. A single-rod electro-hydraulic direct-drive servo cylinder device according to claim 5, Features: The motor body and the hydraulic pump body are both installed transversely, and the motor body and the hydraulic pump body are connected through gear meshing.

7. A single-rod electro-hydraulic direct-drive servo cylinder device according to claim 5, Features: The liquid pump box (17) and the connecting plate (6), the servo cylinder body (5) and the mounting plate (2) are all integrated structures, and the mounting plate (2) and the connecting plate (6) are both made of stainless steel.

8. A single-rod electro-hydraulic direct-drive servo cylinder device according to claim 7, Features: The mounting plate (2) and the connecting plate (6) are fixedly connected via a fastening nut. The arrangement of the mounting plate (2) and the connecting plate (6) enhances the convenience of connecting the liquid pump box (17) and the servo cylinder body (5).

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