A hydraulic cylinder with an adjustment and correction device

Abstract

The present invention relates to the field of hydraulic oil cylinders, and specifically to a hydraulic oil cylinder with an adjustment and correction device; the hydraulic oil cylinder body comprises a piston movably provided inside the hydraulic oil cylinder body, a magnet is fixed inside the piston, a piston rod is fixed at one end of the piston, the piston rod is movably inserted to the outside of the hydraulic oil cylinder body, a connecting pipe is fixed on the side surface of the hydraulic oil cylinder body, and a movable plate is movably provided inside the connecting pipe, and the beneficial effect is: when the pointer is not aligned with the middle scale block and deviates to the A cavity, it means that the pressure of the oil inside the B cavity is greater than the pressure of the oil inside the A cavity, and hydraulic oil needs to be added to the A cavity at this time, and when the pointer moves to correspond to the middle scale block, the increase of hydraulic oil is stopped, and at this time the hydraulic oil pressures inside the A cavity and the B cavity are the same, and then the piston rod can be stopped from being pushed, and since the oil pressures inside the A cavity and the B cavity are the same, the forces acting on the piston by the two are the same and offset, so the piston can be restored to its original position at this time.

Description

Technical Field

[0001] The invention relates to the field of hydraulic cylinders, in particular to a hydraulic cylinder with an adjusting and correcting device. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy. It is mainly used to achieve linear reciprocating motion or swing motion.

[0003] In the prior art, the hydraulic cylinder is a common driving device in life and work, which has the advantages of high power density and high-precision control. The hydraulic cylinder is the power output component of the actuator, which includes a cylinder body with a piston. The piston divides the space in the cylinder body into chamber A and chamber B. During use, when the pressurized oil in the hydraulic pump enters chamber A, the pressure in chamber B is eliminated, and the piston moves toward chamber B, and vice versa. The piston is linked with an external linkage component during the movement, thereby outputting mechanical energy.

[0004] However, traditional actuators are mostly used to drive and control valves. Although the matching relationship between the valve plate or valve core in the valve and the valve is corrected during assembly, deviations are inevitable after a period of use. Since the stroke of the piston in the cylinder matches the opening or closing angle of the valve plate or valve core of the valve during installation, when an error occurs in the opening or closing angle of the valve plate or valve core of the valve, it is necessary to re-calibrate the valve that has been installed and used in a certain working condition, which is not only inconvenient to operate and the process is cumbersome, but also poses a great safety hazard. Summary of the invention

[0005] The object of the present invention is to provide a hydraulic cylinder with an adjustment and correction device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydraulic oil cylinder with an adjustment and correction device, a hydraulic oil cylinder main body, a piston movably clamped inside the hydraulic oil cylinder main body, a magnet fixed inside the piston, a piston rod fixed at one end of the piston, the piston rod movably inserted to the outside of the hydraulic oil cylinder main body, a connecting pipe fixed to the side surface of the hydraulic oil cylinder main body, and a movable plate movably arranged inside the connecting pipe;

[0007] A groove block, wherein a lower support plate and an upper support plate are fixed to the inner wall side surface of the groove block, a lower roller is movably provided on the upper surface of the lower support plate, an upper roller is movably provided on the upper surface of the upper support plate, and a magnet column is movably provided on the upper roller and the inner wall of cavity A.

[0008] Preferably, the piston divides the interior of the hydraulic cylinder body into chamber A and chamber B, one end of the connecting tube is connected to chamber A, and the other end of the connecting tube is connected to chamber B.

[0009] Preferably, a connecting pipe is fixed at the middle position of the connecting pipe, the movable plate is movably arranged on the inner wall of the connecting pipe, push rods are fixed at both ends of the movable plate, and baffles are fixed at the ends of the push rods.

[0010] Preferably, a positioning slide rail is fixed on the inner wall of the connecting tube, a positioning groove is opened on the outer surface of the movable plate, and the positioning slide rail corresponds to the positioning groove and is clamped to form a movably connected connection.

[0011] Preferably, a through groove is formed on the inner wall side surface of the connecting pipe away from the hydraulic cylinder body, and a pointer is fixed on the side surface of the movable plate, and the pointer corresponds to the through groove and is movably arranged.

[0012] Preferably, an intermediate scale block is fixed in the middle position of the through groove, and the intermediate scale block is located on the outer surface of the connecting tube. The diameter of the baffle is the same as the diameter of the inner wall of the connecting tube, the diameter of the movable plate is the same as the diameter of the inner wall of the connecting tube, the inner wall diameter of the connecting tube is larger than the inner wall diameter of the connecting tube, and the diameter of the push rod is smaller than the diameter of the baffle.

[0013] Preferably, the groove block is fixed to the outer surface of the hydraulic cylinder body, the groove block and the connecting pipe are distributed at right angles on the outer surface of the hydraulic cylinder body, the lower support plate is fixed to one side surface of the inner wall of the groove block, and the upper support plate is fixed to the other side surface of the inner wall of the groove block.

[0014] Preferably, the lower support plate is located below the upper support plate, an upper groove is provided on the inner wall surface of the groove block on the same side of the lower support plate, and the upper groove is located above the lower support plate, and a lower groove is provided on the inner wall surface of the groove block on the same side of the upper support plate, and the lower groove is located below the upper support plate.

[0015] Preferably, the upper roller corresponds to the upper groove, and the upper roller does not contact the upper groove; the lower roller corresponds to the lower groove, and the lower roller does not contact the lower groove.

[0016] Preferably, the upper roller and the lower roller are exactly the same, a through hole is provided on the surface of the upper roller, a first annular groove is provided on the inner wall of the through hole, a second annular groove is provided on the outer surface of the magnet column, the first annular groove corresponds to the second annular groove, a sphere is movably provided between the first annular groove and the second annular groove, and the diameter of the through hole is larger than the diameter of the magnet column.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Pushing the piston rod drives the piston to move inside the hydraulic cylinder body. Since the magnet fixed inside the piston corresponds to the magnet column, when the piston moves in the hydraulic cylinder body, it will drive the magnet column to move on the inner wall of the groove block. When the magnet column is observed to be located in the middle position of the groove block, the piston is reset to its original position at this time, and then observe whether the pointer is aligned with the middle scale block. Due to the pressure relationship, when the pointer is not aligned with the middle scale block and deviates to the A chamber, it means that the pressure of the oil inside the B chamber is greater than the pressure of the oil inside the A chamber. At this time, hydraulic oil needs to be added to the A chamber to increase the oil pressure of the A chamber. When the pointer moves to correspond to the middle scale block, stop adding hydraulic oil. At this time, the hydraulic oil pressure inside the A chamber and the B chamber is the same, and then stop pushing the piston rod. Since the oil pressure inside the A chamber and the B chamber is the same, the forces of the two on the piston are the same and offset, so the piston can be restored to its original position at this time, thereby realizing the adjustment and correction of the piston. This structure does not require the help of re-calibration of the valve to realize the correction of the piston, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is an exploded stereoscopic schematic diagram of the overall structure of the present invention;

[0021] Figure 3 It is a partially cutaway exploded three-dimensional schematic diagram of the overall structure of the present invention;

[0022] Figure 4 It is a cutaway perspective schematic diagram of the connecting pipe structure of the present invention;

[0023] Figure 5 It is a three-dimensional schematic diagram of the structure of the movable plate assembly of the present invention;

[0024] Figure 6 It is a schematic cross-sectional view of the magnetic attraction component structure of the present invention;

[0025] Figure 7 It is a cutaway perspective schematic diagram of the groove block structure of the present invention;

[0026] Figure 8 It is an exploded stereoscopic schematic diagram of the magnet column assembly structure of the present invention.

[0027] In the figure: 1. piston rod; 2. hydraulic cylinder body; 3. connecting pipe; 4. connecting pipe; 5. upper roller;

[0028] 6. Groove block; 7. Magnet; 8. Piston; 9. Cavity A; 10. Cavity B; 11. Baffle; 12. Push rod;

[0029] 13. Movable plate; 14. Positioning slide rail; 15. Intermediate scale block; 16. Through groove; 17. Positioning groove; 18. Pointer; 19. Lower roller; 20. Upper groove; 21. Lower support plate; 22. Upper support plate; 23. Lower groove; 24. Through hole; 25. First annular groove; 26. Magnet column; 27. Second annular groove; 28. Sphere. DETAILED DESCRIPTION

[0030] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] See also Figure 1-Figure 8 The present invention provides a technical solution: a hydraulic cylinder with an adjustment and correction device, a piston 8 is movably provided inside the hydraulic cylinder body 2, a magnet 7 is fixed inside the piston 8, a piston rod 1 is fixed at one end of the piston 8, the piston rod 1 is movably inserted into the outside of the hydraulic cylinder body 2, a connecting pipe 3 is fixed on the side surface of the hydraulic cylinder body 2, and a movable plate 13 is movably provided inside the connecting pipe 3.

[0033] A lower support plate 21 and an upper support plate 22 are fixed to the inner wall side surface of the groove block 6. A lower roller 19 is movably provided on the upper surface of the lower support plate 21, and an upper roller 5 is movably provided on the upper surface of the upper support plate 22. A magnet column 26 is movably provided on the upper roller 5 and the inner wall of cavity A 9.

[0034] On the basis of Example 1, in order to achieve the goal of calibrating the piston 8 without having to calibrate the valve again, the piston 8 divides the interior of the hydraulic cylinder body 2 into chamber A 9 and chamber B 10, one end of the connecting tube 3 is connected to chamber A 9, and the other end of the connecting tube 3 is connected to chamber B 10.

[0035] A connecting pipe 4 is fixed in the middle of the connecting pipe 3 , a movable plate 13 is movably arranged on the inner wall of the connecting pipe 4 , push rods 12 are fixed at both ends of the movable plate 13 , and baffles 11 are fixed at the ends of the push rods 12 .

[0036] A positioning rail 14 is fixed to the inner wall of the connecting pipe 4 , and a positioning groove 17 is formed on the outer surface of the movable plate 13 . The positioning rail 14 corresponds to and is clamped in the positioning groove 17 , so as to be movably connected.

[0037] A through groove 16 is formed on the inner wall side surface of the connecting pipe 4 away from the hydraulic cylinder body 2 , and a pointer 18 is fixed on the side surface of the movable plate 13 . The pointer 18 corresponds to the through groove 16 and is movably arranged.

[0038] An intermediate scale block 15 is fixed in the middle position of the through groove 16, and the intermediate scale block 15 is located on the outer surface of the connecting tube 4. The diameter of the baffle 11 is the same as the diameter of the inner wall of the connecting tube 3. The diameter of the movable plate 13 is the same as the diameter of the inner wall of the connecting tube 4. The inner wall diameter of the connecting tube 4 is larger than the inner wall diameter of the connecting tube 3. The diameter of the push rod 12 is smaller than the diameter of the baffle 11.

[0039] The groove block 6 is fixed on the outer surface of the hydraulic cylinder body 2, and the groove block 6 and the connecting pipe 3 are distributed at right angles on the outer surface of the hydraulic cylinder body 2. The lower support plate 21 is fixed on one side of the inner wall of the groove block 6, and the upper support plate 22 is fixed on the other side of the inner wall of the groove block 6.

[0040] The lower support plate 21 is located below the upper support plate 22. An upper groove 20 is provided on the inner wall surface of the groove block 6 on the same side of the lower support plate 21. The upper groove 20 is located above the lower support plate 21. A lower groove 23 is provided on the inner wall surface of the groove block 6 on the same side of the upper support plate 22. The lower groove 23 is located below the upper support plate 22.

[0041] The upper roller 5 corresponds to the upper groove 20 , and the upper roller 5 does not contact the upper groove 20 ; the lower roller 19 corresponds to the lower groove 23 , and the lower roller 19 does not contact the lower groove 23 .

[0042] The upper roller 5 and the lower roller 19 are exactly the same. A through hole 24 is formed on the surface of the upper roller 5. A first annular groove 25 is formed on the inner wall of the through hole 24. A second annular groove 27 is formed on the outer surface of the magnet column 26. The first annular groove 25 corresponds to the second annular groove 27. A sphere 28 is movably provided between the first annular groove 25 and the second annular groove 27. The diameter of the through hole 24 is greater than the diameter of the magnet column 26.

[0043] In actual use, when the piston 8 does not reset after the hydraulic cylinder body 2 is used, it needs to be adjusted and corrected. The piston rod 1 is pushed to drive the piston 8 to move inside the hydraulic cylinder body 2. Since the magnet 7 fixed inside the piston 8 corresponds to the magnet column 26, through the principle of magnetic attraction, when the piston 8 moves in the hydraulic cylinder body 2, it will drive the magnet column 26 to move on the inner wall of the groove block 6. When the magnet column 26 is observed to be in the middle position of the groove block 6, the piston 8 is reset to its original position at this time, and then observe whether the pointer 18 is aligned with the middle scale block 15. Due to the pressure relationship, when the pointer 18 is not aligned with the middle scale block 15, the pointer 18 is aligned with the middle scale block 15. When the block 15 is aligned and biased towards the A chamber 9, it means that the pressure of the oil in the B chamber 10 is greater than the pressure of the oil in the A chamber 9. At this time, hydraulic oil needs to be added to the A chamber 9 to increase the oil pressure in the A chamber 9. When the pointer 18 moves to the corresponding middle scale block 15, stop adding hydraulic oil. At this time, the hydraulic oil pressures in the A chamber 9 and the B chamber 10 are the same. Then, the piston rod 1 can be stopped. Since the oil pressures in the A chamber 9 and the B chamber 10 are the same, the forces exerted by the two on the piston 8 are the same and offset. Therefore, the piston 8 can be restored to its original position at this time, thereby realizing the adjustment and correction of the piston 8. This structure does not require The piston rod 1 is pushed to drive the magnet column 26 to move in the groove block 6 through the magnet 7. Since the outer surface of the magnet column 26 is movably sleeved with an upper roller 5 and a lower roller 19, and the through groove 16 is connected to the upper roller 5 and the lower roller 19 through the second annular groove 27, the rolling friction is less than the sliding friction. Therefore, the friction force of the upper roller 5 and the lower roller 19 driven by the movement of the magnet column 26 is very small, and the upper roller 5 and the lower roller 19 are not in contact with the inner wall of the groove block 6 at the same time. The upper roller 5 and the lower roller 19 are only in contact with the surface of one side of the groove block 6. The upper roller 5 and the lower roller 19 are in contact, and the contact surfaces of the upper roller 5 and the lower roller 19 are opposite. At the same time, the upper roller 5 and the lower roller 19 are supported by the upper support plate 22 and the lower support plate 21 respectively, so the upper roller 5 and the lower roller 19 can drive the magnet column 26 to position on the inner wall of the groove block 6. The upper roller 5 and the lower roller 19 rotate in opposite directions, so the friction forces they receive are opposite, thereby offsetting an opposite friction force, so that the friction force received by the magnet column 26 when moving on the inner wall of the groove block 6 is extremely small, and this extremely small friction force will not affect the magnetic attraction of the magnet 7 to the magnet column 26, thereby ensuring that the magnet column 26 reflects the accuracy of the position of the piston 8.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder with an adjustment and correction device, characterized in that: include: A hydraulic cylinder body (2), wherein a piston (8) is movably mounted inside the hydraulic cylinder body (2), a magnet (7) is fixed inside the piston (8), a piston rod (1) is fixed at one end of the piston (8), the piston rod (1) is movably inserted into the outside of the hydraulic cylinder body (2), a connecting pipe (3) is fixed on the side surface of the hydraulic cylinder body (2), and a movable plate (13) is movably mounted inside the connecting pipe (3); A groove block (6), wherein a lower support plate (21) and an upper support plate (22) are fixed to the inner wall side surface of the groove block (6), a lower roller (19) is movably provided on the upper surface of the lower support plate (21), an upper roller (5) is movably provided on the upper surface of the upper support plate (22), and a magnet column (26) is movably provided on the upper roller (5) and the inner wall of the A cavity (9).

2. A hydraulic cylinder with an adjustment and correction device according to claim 1, characterized in that: The piston (8) divides the interior of the hydraulic cylinder body (2) into chamber A (9) and chamber B (10); one end of the connecting tube (3) is connected to chamber A (9), and the other end of the connecting tube (3) is connected to chamber B (10).

3. The hydraulic cylinder with an adjustment and correction device according to claim 2, characterized in that: A connecting pipe (4) is fixed in the middle of the connecting pipe (3), the movable plate (13) is movably arranged on the inner wall of the connecting pipe (4), push rods (12) are fixed at both ends of the movable plate (13), and baffles (11) are fixed at the ends of the push rods (12).

4. The hydraulic cylinder with an adjustment and correction device according to claim 3, characterized in that: A positioning slide rail (14) is fixed on the inner wall of the connecting pipe (4), a positioning groove (17) is provided on the outer surface of the movable plate (13), and the positioning slide rail (14) corresponds to and is clamped with the positioning groove (17) to form a movable connection.

5. The hydraulic cylinder with an adjustment and correction device according to claim 4, characterized in that: A through groove (16) is provided on the inner wall side surface of the connecting pipe (4) away from the hydraulic cylinder body (2), and a pointer (18) is fixed on the side surface of the movable plate (13). The pointer (18) corresponds to the through groove (16) and is movably arranged.

6. The hydraulic cylinder with an adjustment and correction device according to claim 5, characterized in that: An intermediate scale block (15) is fixed in the middle position of the through groove (16), and the intermediate scale block (15) is located on the outer surface of the connecting tube (4). The diameter of the baffle (11) is the same as the diameter of the inner wall of the connecting tube (3). The diameter of the movable plate (13) is the same as the diameter of the inner wall of the connecting tube (4). The inner wall diameter of the connecting tube (4) is larger than the inner wall diameter of the connecting tube (3). The diameter of the push rod (12) is smaller than the diameter of the baffle (11).

7. The hydraulic cylinder with an adjustment and correction device according to claim 6, characterized in that: The groove block (6) is fixed to the outer surface of the hydraulic cylinder body (2); the groove block (6) and the connecting pipe (3) are distributed at right angles on the outer surface of the hydraulic cylinder body (2); the lower support plate (21) is fixed to one side surface of the inner wall of the groove block (6); and the upper support plate (22) is fixed to the other side surface of the inner wall of the groove block (6).

8. The hydraulic cylinder with an adjustment and correction device according to claim 7, characterized in that: The lower support plate (21) is located below the upper support plate (22); an upper groove (20) is provided on the inner wall surface of the groove block (6) on the same side of the lower support plate (21); the upper groove (20) is located above the lower support plate (21); a lower groove (23) is provided on the inner wall surface of the groove block (6) on the same side of the upper support plate (22); the lower groove (23) is located below the upper support plate (22).

9. The hydraulic cylinder with an adjustment and correction device according to claim 8, characterized in that: The upper roller (5) corresponds to the upper groove (20), and the upper roller (5) does not contact the upper groove (20); the lower roller (19) corresponds to the lower groove (23), and the lower roller (19) does not contact the lower groove (23).

10. The hydraulic cylinder with an adjustment and correction device according to claim 9, characterized in that: The upper roller (5) and the lower roller (19) are completely identical. A through hole (24) is provided on the surface of the upper roller (5). A first annular groove (25) is provided on the inner wall of the through hole (24). A second annular groove (27) is provided on the outer surface of the magnet column (26). The first annular groove (25) corresponds to the second annular groove (27). A sphere (28) is movably provided between the first annular groove (25) and the second annular groove (27). The diameter of the through hole (24) is greater than the diameter of the magnet column (26).

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