Oil cylinder with adjustable stroke and upper and lower limit

Abstract

The utility model relates to the technical field of hydraulic machine oil cylinders, in particular to an oil cylinder capable of adjusting stroke and up-and-down limit. Comprising a cylinder barrel and a piston block arranged in the cylinder barrel in a sliding mode, a cylinder cover is arranged at a cylinder opening of the cylinder barrel, the cylinder cover is flush with the cylinder opening of the cylinder barrel, a cylinder opening lock nut is arranged on the cylinder cover to fix the cylinder cover to the cylinder opening, a cylinder bottom is arranged at the other end of the cylinder barrel, and the two ends of the piston block are fixedly connected with a first piston rod and a second piston rod respectively. The first piston rod penetrates through the cylinder cover to extend outwards and is in threaded connection with an adjusting nut and a locking nut, and the second piston rod penetrates through the cylinder bottom to extend outwards and is connected with an adjusting mechanism. The adjusting stroke is optimized, and the function of adjusting the upper limit and the lower limit of the oil cylinder is added. The stroke is adjusted, and the adjusting precision of the oil cylinder stroke is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to an oil cylinder with adjustable stroke and upper and lower limit positions. Background Art

[0002] The known hydraulic cylinder is composed of a cylinder barrel, a piston rod, an adjusting nut, a mounting flange, a cylinder port, a cylinder port lock nut, a piston rod and a flange. The current cylinder can only adjust the stroke of the cylinder, but cannot set upper and lower limits for the adjusted cylinder stroke, and cannot actively adjust the cylinder stroke, resulting in low stroke accuracy of the cylinder.

[0003] To this end, the utility model proposes an oil cylinder with adjustable stroke and upper and lower limits, optimizes the adjustment stroke, and increases the adjustment function of the upper and lower limits of the oil cylinder, thereby achieving the adjustment stroke and improving the adjustment accuracy of the oil cylinder stroke. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and proposes an oil cylinder with adjustable stroke and upper and lower limit positions.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A hydraulic cylinder with adjustable stroke and upper and lower limit, comprising a cylinder barrel and a piston block slidably arranged in the cylinder barrel, a cylinder cover is arranged at the cylinder mouth of the cylinder barrel, the cylinder cover is flush with the cylinder mouth of the cylinder barrel, a cylinder mouth lock nut is arranged on the cylinder cover to fix the cylinder cover on the cylinder mouth, a cylinder bottom is arranged at the other end of the cylinder barrel, a first piston rod and a second piston rod are fixedly connected at both ends of the piston block respectively, the first piston rod penetrates the cylinder cover to extend outwards, and is threadedly connected with an adjusting nut and a locking nut, the second piston rod penetrates the cylinder bottom to extend outwards, and is connected with an adjusting mechanism.

[0007] Furthermore, the end of the first piston rod is connected to a cylinder connecting flange.

[0008] Furthermore, the adjustment mechanism includes an annular adjustment gear, a support plate, a mounting plate and a worm, the annular adjustment gear is sleeved on the second piston rod, a worm is meshed on the outside of the annular adjustment gear, the worm is fixedly mounted on the support plate, and the support plate is fixedly connected to the surface of the mounting plate.

[0009] Furthermore, there are two support plates, which are symmetrically arranged on one side of the mounting plate, and the worm is fixedly installed between the two support plates, and one end of the worm is connected to a motor.

[0010] Furthermore, the annular adjusting gear and the axial direction of the worm are perpendicular to each other.

[0011] Furthermore, the right end of the second piston rod is provided with an external thread, the right end of the inside of the annular adjusting gear is provided with a thread groove, and the external thread and the internal thread are screwed together and matched.

[0012] Furthermore, the right end surface of the second piston rod is fixedly connected to the mounting plate.

[0013] Compared with the existing technology, the utility model provides an oil cylinder with adjustable stroke and upper and lower limits. The advantages are:

[0014] 1. The stroke of the oil cylinder can be adjusted to limit the upper and lower positions. It has a simple structure and is easy to install.

[0015] 2. The adjusting nut can limit the stroke of the piston rod, which has a good effect;

[0016] 3. The worm and gear mesh together to ensure stable operation of the cylinder and high adjustment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional structure diagram of an oil cylinder with adjustable stroke and upper and lower limit in the utility model;

[0018] In the figure: 1. cylinder barrel, 2. piston block, 3. cylinder head, 4. cylinder port lock nut, 5. cylinder bottom, 6. first piston rod, 7. second piston rod, 8. adjusting nut, 9. locking nut, 10. annular adjusting gear, 11. worm, 12. support plate, 13. mounting plate, 14. external thread, 15. thread groove, 16. cylinder barrel gasket, 17. oil port, 18. mold frame connecting flange. DETAILED DESCRIPTION

[0019] 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.

[0020] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front",

[0021] The directions or positional relationships indicated by “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, it cannot be understood as a limitation on the present invention. At the same time, the terms “first”, “second”, etc. are only for distinguishing the names of the components, and there is no primary or secondary relationship. Therefore, it cannot be understood as a limitation on the present invention.

[0022] Embodiment 1, as Figure 1 As shown, the utility model provides an oil cylinder with adjustable stroke and upper and lower limit, including a cylinder barrel 1 and a piston block 2 slidably arranged in the cylinder barrel 1, a cylinder cover 3 is arranged at the cylinder mouth of the cylinder barrel, the cylinder cover 3 is flush with the cylinder mouth of the cylinder barrel, a cylinder mouth lock nut 4 is arranged on the cylinder cover 3 to fix the cylinder cover on the cylinder mouth by bolts, and a cylinder bottom 5 is fixedly arranged at the other end of the cylinder barrel, and a first piston rod 6 and a second piston rod 7 are fixedly connected at both ends of the piston block 2 respectively, the first piston rod 6 penetrates the cylinder cover 3 to extend outward, and is threadedly connected with an adjusting nut 8 and a locking nut 9, the second piston rod 7 penetrates the cylinder bottom to extend outward, and is connected with an adjusting mechanism, the adjusting mechanism is used to adjust the stroke of the second piston rod, and will also limit the stroke of the first piston rod.

[0023] A pressure ring is arranged between the top of the cylinder cover and the cylinder port lock nut 4. The pressure ring has a good sealing effect and can increase the connection strength. The pressure ring also has a certain elasticity. It can absorb the vibration and impact generated during the operation of the machine and reduce the damage to the machine body. The end face of the cylinder port lock nut 4 is also provided with a cylinder gasket 16. The cylinder gasket 16 is a flat metal ring, which is used to protect the end face of the cylinder port lock nut 4 from being scratched by the adjusting nut 8 and to disperse the pressure of the adjusting nut 8 on the cylinder port lock nut 4.

[0024] The adjusting mechanism comprises an annular adjusting gear 10, a worm 11, a support plate 12 and a mounting plate 13. The annular adjusting gear 10 is sleeved on the second piston rod 7. The annular adjusting gear 10 is meshed with a worm 11 on the outside. The worm 11 is fixedly mounted on the support plate 12. The support plate 12 is fixedly mounted on the surface of the mounting plate 13.

[0025] There are two support plates 12, which are symmetrically arranged on the same side of the mounting plate by bolts. The worm 11 is fixedly installed between the two support plates. A guide sleeve is also provided at the connection between the worm and the support plate to ensure the accuracy of the worm rotation. A motor is connected to one end of the worm 11. The annular adjustment gear 10 and the worm 11 are axially perpendicular to each other.

[0026] Through this technical solution, when the motor rotates, it will drive the worm 11 to rotate. Since the worm 11 and the annular adjusting gear 10 are meshed with each other, when the worm 11 rotates, it will drive the annular adjusting gear 10 to rotate, thereby changing the position of the annular adjusting gear 10.

[0027] The second piston rod 7 is provided with an external thread 14 on the right side of the rod. The inner right end of the annular adjustment gear 10 ( Figure 1 A thread groove 15 is provided on the ring (in the direction shown), and the thread groove 15 and the external thread 14 are screwed together and matched, and the right end surface of the second piston rod 7 is fixedly connected to the mounting plate 13.

[0028] Therefore, when the worm 11 is rotated by the motor, the annular adjusting gear 10 will be driven to rotate. Since the second piston rod 7 is threadedly connected to the annular adjusting gear 10, the position of the second piston rod 7 will also change with the change of the position of the annular adjusting gear 10, thereby adjusting the telescopic stroke of the first piston rod.

[0029] The working principle of the utility model is as follows: when the stroke of the cylinder is to be adjusted, that is, the stroke of the second piston rod is to be adjusted, the motor is started first, and the rotation of the motor drives the annular adjusting gear 10 to rotate. Since the second piston rod 7 is fixedly connected to the mounting plate 13, the second piston rod 7 will not rotate therewith, and since the annular adjusting gear 10 is threadedly connected to the second piston rod 7, the annular adjusting gear 10 can move its position. When it moves to a suitable position, the position of the adjusting nut 8 and the locking nut 9 on the first piston rod is rotated accordingly. Since the end of the first piston rod 6 is connected to the mold frame connecting flange 18 and is fixed to the mold frame by bolts, the first piston rod 6 will not rotate either. Therefore, by rotating the adjusting nut 8, the adjusting nut 8 can move its position on the first piston rod 6, and then the first piston rod 6 can be limited. The adjusting nut 8 and the annular adjusting gear 10 jointly limit the stroke of the piston rod.

[0030] After adjusting the position of the second piston rod 7, the hydraulic system is started again, and the hydraulic oil enters from the oil port 17. The piston block moves, driving the first piston rod 6 and the second piston rod 7 to move. When the annular adjusting gear 10 moves to the cylinder bottom 5, it will be resisted, thereby controlling the stroke of the first piston rod 6. When retracting, when the adjusting nut 8 moves to the cylinder gasket 16, it will also limit the stroke of the first piston rod 6. By actively limiting the first piston rod 6, the accuracy of the cylinder piston rod stroke is improved.

[0031] The hydraulic system and control system can be realized by designing and programming by technicians in this field.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An oil cylinder with adjustable stroke and upper and lower limit, comprising a cylinder barrel (1) and a piston block (2) slidably arranged in the cylinder barrel (1), a cylinder cover (3) being arranged at the cylinder mouth of the cylinder barrel, a cylinder mouth lock nut (4) being arranged on the cylinder cover (3) to fix the cylinder cover on the cylinder mouth, a cylinder bottom (5) being fixedly arranged at the other end of the cylinder barrel (1), characterized in that: The two ends of the piston block (2) are respectively fixedly connected to a first piston rod (6) and a second piston rod (7); the first piston rod (6) passes through the cylinder cover (3) to extend outwards and is threadedly connected to an adjusting nut (8) and a locking nut (9); the second piston rod (7) passes through the cylinder bottom to extend outwards and is connected to an adjusting mechanism, and the adjusting mechanism is used to adjust the stroke of the cylinder.

2. The oil cylinder with adjustable stroke and upper and lower limits according to claim 1, characterized in that: The adjustment mechanism comprises an annular adjustment gear (10), a worm (11), a support plate (12) and a mounting plate (13); the annular adjustment gear (10) is sleeved on the second piston rod (7); a worm (11) is meshed on the outer side of the annular adjustment gear (10); the worm (11) is fixedly mounted on the support plate (12); and the support plate (12) is fixedly mounted on the mounting plate (13).

3. The oil cylinder with adjustable stroke and upper and lower limits according to claim 2, characterized in that: There are two support plates (12) symmetrically arranged on both sides of the upper part of the mounting plate (13); the worm (11) is fixedly installed between the two support plates; one end of the worm (11) is connected to a motor.

4. The oil cylinder with adjustable stroke and upper and lower limits according to claim 3, characterized in that: The annular adjustment gear (10) and the worm (11) are axially perpendicular to each other.

5. The oil cylinder with adjustable stroke and upper and lower limits according to claim 2, characterized in that: The second piston rod (7) is provided with an external thread (14) on the right side thereof, and the annular adjusting gear (10) is provided with a thread groove (15) on the right side thereof, wherein the thread groove (15) and the external thread (14) are screwed together and matched.

6. The oil cylinder with adjustable stroke and upper and lower limits according to claim 5, characterized in that: The right end surface of the second piston rod (7) is fixedly connected to the mounting plate (13).

7. The oil cylinder with adjustable stroke and upper and lower limits according to claim 1, characterized in that: The end of the first piston rod (6) is connected to a mold frame connecting flange (18).

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