A stroke hydraulic cylinder device

Abstract

The utility model discloses a kind of stroke hydraulic cylinder devices that can be carried out, it is related to hydraulic cylinder control technical field, and it includes: cylinder barrel, piston rod is arranged in cylinder barrel, the top of piston rod is arranged cylinder head, the bottom of piston rod is arranged piston;The bottom of cylinder barrel is arranged cylinder seat, and position detection device is arranged on cylinder seat;Among them, position detection device includes sensor mounting seat, T type nut sleeve rod, T type screw and transmission shaft;Sensor mounting seat is fixed in the bottom position inside cylinder barrel, and transmission shaft is inserted into sensor mounting seat setting;T type nut sleeve rod is arranged in the inside of piston rod, and the bottom of T type nut sleeve rod is fixedly set T type nut;The bottom of T type screw is fixedly connected with the top of transmission shaft, and the top of T type screw is set through T type nut;Sensor mounting seat is provided with photoelectric sensor, and grating plate is also fixedly connected on the upper portion of transmission shaft, and grating plate is arranged in the probe position of photoelectric sensor.The utility model alleviates the technical problem of high cost, control complex in prior art.

Description

Technical Field

[0001] This invention relates to the field of hydraulic cylinder control technology, specifically to a controllable stroke hydraulic cylinder device. Background Technology

[0002] In current market applications, especially when precise control of hydraulic cylinder lifting distance and balance control of multiple hydraulic cylinders is required, servo hydraulic cylinders are the preferred choice. However, servo hydraulic cylinders are too expensive and relatively complex to control. Summary of the Invention

[0003] The purpose of this invention is to provide a controllable stroke hydraulic cylinder device in order to solve at least one of the above-mentioned technical problems.

[0004] This invention provides a controllable stroke hydraulic cylinder device, comprising: a cylinder barrel, a piston rod disposed within the cylinder barrel, a cylinder head disposed at the top of the piston rod, and a piston disposed at the bottom of the piston rod; a cylinder seat disposed at the bottom of the cylinder barrel, and a position detection device disposed on the cylinder seat; wherein, the position detection device includes a sensor mounting base, a T-shaped nut sleeve, a T-shaped screw, and a drive shaft; the sensor mounting base is fixed to the bottom of the cylinder barrel, and the drive shaft is inserted into the sensor mounting base; the T-shaped nut sleeve is disposed inside the piston rod, and a T-shaped nut is fixedly disposed at the bottom of the T-shaped nut sleeve; the bottom of the T-shaped screw is fixedly connected to the top of the drive shaft, and the top of the T-shaped screw passes through the T-shaped nut; a photoelectric sensor is disposed on the sensor mounting base, and a grating plate is fixedly connected to the drive shaft, the grating plate being disposed at the probe position of the photoelectric sensor.

[0005] Furthermore, the sensor mounting base is also provided with an origin reset device; the origin reset device includes a push rod, a reset spring, and an origin switch; wherein, the push rod passes through a mounting hole provided on the sensor mounting base, the reset spring is provided in the mounting hole, a baffle is fixedly provided on the push rod, and the top of the reset spring abuts against the lower surface of the baffle; a photoelectric sensor circuit board is provided below the push rod, the origin switch is provided on the photoelectric sensor circuit board, the bottom of the push rod is located directly above the origin switch, and the top of the push rod is located directly below the piston.

[0006] Furthermore, a signal line port is provided on the side wall of the cylinder seat, and a signal line is provided at the bottom of the photoelectric sensor circuit board. The signal line passes through the signal line port and connects to the signal line connector.

[0007] Furthermore, the origin switch includes a push-button switch; when the piston is in the raised state, the top of the push rod extends out of the mounting hole, and the bottom of the push rod is located directly above the origin switch and does not contact the button of the origin switch; when the piston is at the lowest point inside the cylinder, the top of the push rod is pressed down by the piston, and the bottom of the push rod is pressed down and triggers the button of the origin switch.

[0008] Furthermore, the grating plate includes a gear disk.

[0009] Furthermore, the cylinder seat has a rodless chamber oil port and a rod chamber oil port on its side. The cylinder is divided into an upper rod chamber and a lower rodless chamber by the piston. The rodless chamber oil port is connected to the rodless chamber. Oil pipes are provided on the outside of the drive shaft and the T-screw. The rod chamber oil port is connected to the rod chamber through the oil pipes.

[0010] Furthermore, the top of the T-shaped nut sleeve is fixedly connected to the cylinder head by a first connecting pin; the top of the drive shaft is fixedly connected to the bottom of the T-shaped screw by a second connecting pin.

[0011] Furthermore, the T-shaped nut sleeve is fixed to the T-shaped nut by welding.

[0012] Furthermore, a thrust ball bearing is provided on the top of the sensor mounting base, and a ball bearing is provided inside the sensor mounting base. The drive shaft passes through the thrust ball bearing and the ball bearing.

[0013] Furthermore, a cylinder head is also provided on the top of the cylinder barrel.

[0014] This invention provides a controllable stroke hydraulic cylinder device. By combining a photoelectric sensor with a grating plate, it achieves precise measurement of the lifting distance of the cylinder head of the hydraulic cylinder. This, in turn, allows for accurate control of the hydraulic cylinder stroke by controlling the hydraulic oil inside the cylinder. Furthermore, the device has a simple structure and low cost, alleviating the technical problems of high cost and complex control found in existing technologies. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 A cross-sectional view of a controllable stroke hydraulic cylinder device in the retracted state, provided in an embodiment of the present invention; Figure 2 A cross-sectional view of a controllable stroke hydraulic cylinder device in the extended state, provided as an embodiment of the present invention; Figure 3 This is a partially enlarged schematic diagram of a location detection device provided in an embodiment of the present invention; Figure 4 for Figure 2 A magnified view of part A in the diagram; Figure 5 for Figure 3 A magnified view of part B in the diagram.

[0017] In the diagram: 1. Cylinder barrel, 2. Piston rod, 3. Cylinder head, 4. Piston, 5. Cylinder seat, 6. Position detection device, 7. Sensor mounting base, 8. T-nut sleeve, 9. T-screw, 10. Drive shaft, 11. T-nut, 12. Photoelectric sensor, 13. Grating plate, 14. Push rod, 15. Return spring, 16. Origin switch, 17. Mounting hole, 18. Baffle, 19. Photoelectric sensor circuit board, 20. Signal line port, 21. Signal line, 22. Signal line connector, 23. Rodless chamber oil port, 24. Rod chamber oil port, 25. Rod chamber, 26. Rodless chamber, 27. Oil pipe, 28. First connecting pin, 29. Second connecting pin, 30. Thrust ball bearing, 31. Ball bearing, 32. Cylinder head. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] Figure 1 This is a cross-sectional view of a controllable stroke hydraulic cylinder device in the retracted state according to an embodiment of the present invention. Figure 2 This is a cross-sectional view of a controllable stroke hydraulic cylinder device according to an embodiment of the present invention in its extended state. Figure 1 and Figure 2 As shown, it includes: a cylinder 1, a piston rod 2 disposed inside the cylinder 1, a cylinder head 3 disposed at the top of the piston rod 2, and a piston 4 disposed at the bottom of the piston rod 2; a cylinder seat 5 disposed at the bottom of the cylinder 1, and a position detection device 6 disposed on the cylinder seat 5.

[0020] Specifically, a cylinder head 32 is also provided on the top of the cylinder barrel 1.

[0021] Figure 3 This is a partially enlarged schematic diagram of a location detection device according to an embodiment of the present invention. Figure 4 yesFigure 2 A magnified view of part A in the diagram. (See diagram below.) Figure 3 and Figure 4 As shown, the position detection device 6 includes a sensor mounting base 7, a T-shaped nut sleeve 8, a T-shaped screw 9, and a drive shaft 10; the sensor mounting base 7 is fixed at the bottom of the cylinder 1, and the drive shaft 10 is inserted into the sensor mounting base 7; the T-shaped nut sleeve 8 is disposed inside the piston rod 2, and a T-shaped nut 11 is fixedly disposed at the bottom of the T-shaped nut sleeve 8; the bottom of the T-shaped screw 9 is fixedly connected to the top of the drive shaft 10, and the top of the T-shaped screw 9 passes through the T-shaped nut 11.

[0022] Preferably, the top of the T-shaped nut sleeve 8 is fixedly connected to the cylinder head 3 by a first connecting pin 28; the top of the drive shaft 10 is fixedly connected to the bottom of the T-shaped screw 9 by a second connecting pin 29.

[0023] Preferably, the T-shaped nut sleeve 8 and the T-shaped nut 11 are fixed by welding.

[0024] Specifically, such as Figure 3 As shown, a photoelectric sensor 12 is mounted on the sensor mounting base 7, and a grating plate 13 is fixedly connected to the upper part of the drive shaft 10. The grating plate 13 is located at the probe position of the photoelectric sensor 12.

[0025] Preferably, the grating plate 13 includes a gear disk. When the piston rod 2 extends, it drives the T-shaped nut sleeve 8 and the T-shaped nut 11 to rise. With the cooperation of the T-shaped nut 11 and the T-shaped screw 9, the T-shaped screw 9 is driven to rotate, which in turn drives the gear disk to rotate. The number of teeth of the gear disk can be detected by the photoelectric sensor 12, thereby obtaining the extension distance of the piston rod 2.

[0026] Figure 5 yes Figure 3 A magnified view of part B in the diagram. (See diagram below.) Figure 5 As shown, the sensor mounting base 7 is also equipped with an origin reset device; wherein, the origin reset device includes a push rod 14, a reset spring 15, and an origin switch 16. The push rod 14 passes through the mounting hole 17 provided on the sensor mounting base 7, the reset spring 15 is provided in the mounting hole 17, and a baffle 18 is fixedly provided on the push rod 14, with the top of the reset spring 15 abutting against the lower surface of the baffle 18.

[0027] Specifically, a photoelectric sensor circuit board 19 is provided below the push rod 14, and an origin switch 16 is provided on the photoelectric sensor circuit board 19. The bottom of the push rod 14 is located directly above the origin switch 16, and the top of the push rod 14 is located directly below the piston 4.

[0028] Preferably, the origin switch 16 includes a push-button switch.

[0029] Specifically, in this embodiment of the invention, when the piston 4 is in the raised state, the top of the push rod 14 extends out of the mounting hole 17, and the bottom of the push rod 14 is located directly above the origin switch 16 and does not contact the button of the origin switch 16. When piston 4 is at the lowest point inside cylinder 1, the top of push rod 14 is pressed down by piston 4, the bottom of push rod 14 is pressed down and triggers the button of origin switch 16, and automatically resets when piston 4 extends due to the action of reset spring 15.

[0030] Specifically, a signal line port 20 is provided on the side wall of the cylinder seat 5, and a signal line 21 is provided at the bottom of the photoelectric sensor circuit board 19. The signal line 21 passes through the signal line port 20 and is connected to the signal line connector 22.

[0031] Specifically, such as Figure 2 As shown, the cylinder seat 5 is provided with a rodless chamber oil port 23 and a rod chamber oil port 24 on its side. The cylinder barrel 1 is divided by the piston into an upper rod chamber 25 and a lower rodless chamber 26. The rodless chamber oil port 23 is connected to the rodless chamber 26. An oil pipe 27 is provided on the outside of the drive shaft 10 and the T-shaped screw 9, and the oil port 24 of the rod chamber is connected to the rod chamber 25 through the oil pipe 27.

[0032] like Figure 2 As shown, a thrust ball bearing 30 is provided on the top of the sensor mounting base 7, and a ball bearing 31 is provided inside the sensor mounting base 7. The drive shaft 10 passes through the thrust ball bearing 30 and the ball bearing 31.

[0033] The working principle of a controllable stroke hydraulic cylinder device provided in this embodiment of the invention is as follows: When the hydraulic cylinder needs to extend: the external hydraulic pump starts working, pumping hydraulic oil into the rodless chamber port 23. Under the pressure of the hydraulic oil in the rodless chamber, the piston 4 of the hydraulic cylinder pushes the piston 4, piston rod 2, and cylinder head 3 upward along the inner wall of the cylinder barrel 1. During the extension of the piston 4, the cylinder head 3 drives the T-nut sleeve 8 to extend forward. The T-nut 11 fixed on the T-nut sleeve 8 pulls the T-screw 9 to rotate. The T-screw 9 drives the transmission shaft 10 connected to it to rotate, which in turn drives the grating plate 13 to rotate. The photoelectric sensor 12 calculates the extension distance of the piston 4 by detecting the number of teeth or scale of the grating plate 13 during its rotation. When the piston rod 2 extends, the hydraulic oil in the rod chamber 25 is discharged into the oil tank of the hydraulic unit through the rod chamber port 24 under the pressure of the piston 4.

[0034] When the hydraulic cylinder retracts: the hydraulic pump works in reverse to pump hydraulic oil into the rod chamber 25, pushing the piston 4 to move downward along the inner wall of the cylinder 1. When the piston moves to the lowest position inside the cylinder 1, it presses the push rod 14 downward. When the push rod 14 touches the origin switch 16, the piston rod 2 of the hydraulic cylinder stops moving downward, ensuring that the origin is the same each time it extends.

[0035] When two or more hydraulic cylinders need to be controlled synchronously, the hydraulic cylinders can be connected through a hydraulic unit and a proportional valve to achieve synchronous lifting control of the hydraulic cylinders. The controller can control the stroke of each of the two hydraulic cylinders separately. Based on the difference in the extension stroke, the output of the hydraulic unit pump can be adjusted to achieve specific synchronous adjustment of the extension, avoiding abnormalities caused by the difference in the stroke of the hydraulic cylinders, which may lead to failure or damage to the terminal equipment.

[0036] As described above, the controllable stroke hydraulic cylinder device provided in this embodiment of the invention achieves accurate measurement of the lifting distance of the cylinder head through the cooperation of photoelectric sensors and grating plates, and then, in conjunction with the control of the hydraulic oil in the cylinder, achieves accurate control of the hydraulic cylinder stroke. Moreover, it has a simple structure and low cost.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A controllable stroke hydraulic cylinder device, characterized in that, include: A cylinder barrel, within which a piston rod is disposed, a cylinder head is disposed at the top of the piston rod, and a piston is disposed at the bottom of the piston rod; a cylinder seat is disposed at the bottom of the cylinder barrel, and a position detection device is disposed on the cylinder seat; wherein, The position detection device includes a sensor mounting base, a T-shaped nut sleeve, a T-shaped screw, and a drive shaft; the sensor mounting base is fixed to the bottom of the cylinder, and the drive shaft is inserted into the sensor mounting base; the T-shaped nut sleeve is disposed inside the piston rod, and a T-shaped nut is fixedly disposed at the bottom of the T-shaped nut sleeve; the bottom of the T-shaped screw is fixedly connected to the top of the drive shaft, and the top of the T-shaped screw passes through the T-shaped nut; The sensor mounting base is equipped with a photoelectric sensor, and a grating plate is fixedly connected to the drive shaft. The grating plate is positioned at the probe position of the photoelectric sensor.

2. The controllable stroke hydraulic cylinder device according to claim 1, characterized in that: The sensor mounting base is also equipped with an origin reset device; the origin reset device includes a push rod, a reset spring, and an origin switch; wherein... The push rod passes through the mounting hole provided on the sensor mounting base, the reset spring is provided in the mounting hole, a baffle is fixedly provided on the push rod, and the top of the reset spring abuts against the lower surface of the baffle; A photoelectric sensor circuit board is installed below the push rod, and the origin switch is installed on the photoelectric sensor circuit board. The bottom of the push rod is located directly above the origin switch, and the top of the push rod is located directly below the piston.

3. The controllable stroke hydraulic cylinder device according to claim 2, characterized in that: The cylinder seat sidewall is also provided with a signal line port, and a signal line is provided at the bottom of the photoelectric sensor circuit board. The signal line passes through the signal line port and is connected to the signal line connector.

4. The controllable stroke hydraulic cylinder device according to claim 2, characterized in that: The origin switch includes a push-button switch; When the piston is in the raised state, the top of the push rod extends out of the mounting hole, and the bottom of the push rod is located directly above the origin switch and does not contact the button of the origin switch; When the piston is at the lowest point inside the cylinder, the top of the push rod is pressed down by the piston, and the bottom of the push rod is pressed down and triggers the button of the origin switch.

5. The controllable stroke hydraulic cylinder device according to claim 1, characterized in that: The grating plate includes a gear disk.

6. The controllable stroke hydraulic cylinder device according to claim 1, characterized in that: The cylinder seat has a rodless chamber port and a rod chamber port on its side. The cylinder is divided into an upper rod chamber and a lower rodless chamber by the piston. The rodless chamber port is connected to the rodless chamber. Oil pipes are provided on the outer sides of the drive shaft and the T-shaped screw, and the oil port of the rod cavity is connected to the rod cavity through the oil pipes.

7. The controllable stroke hydraulic cylinder device according to claim 1, characterized in that: The top of the T-shaped nut sleeve is fixedly connected to the cylinder head by a first connecting pin; the top of the drive shaft is fixedly connected to the bottom of the T-shaped screw by a second connecting pin.

8. The controllable stroke hydraulic cylinder device according to claim 1, characterized in that: The T-shaped nut sleeve is fixed to the T-shaped nut by welding.

9. The controllable stroke hydraulic cylinder device according to claim 1, characterized in that: A thrust ball bearing is provided on the top of the sensor mounting base, and a ball bearing is provided inside the sensor mounting base. The drive shaft passes through the thrust ball bearing and the ball bearing.

10. The controllable stroke hydraulic cylinder device according to claim 1, characterized in that: A cylinder head is also provided on the top of the cylinder.

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