Locking hydraulic oil cylinder with controllable extrusion depth

Abstract

The utility model discloses a locking hydraulic oil cylinder with controllable extrusion depth, which relates to the technical field of hydraulic oil cylinders and comprises an oil cylinder, an adjusting bin, an adjusting block and a threaded rod, an oil outlet is arranged on one side of the top of the oil cylinder and communicated with the inside of the oil cylinder, and an oil inlet is arranged on one side of the bottom of the oil cylinder and communicated with the inside of the oil cylinder. The oil inlet is communicated with the interior of the oil cylinder, a piston is arranged in the oil cylinder, the second gear is driven to rotate by rotating the rotary knob, and then the two first gears meshed with the second gear are driven to rotate synchronously. When the first gear rotates, the two threaded rods connected with the first gear are driven to rotate, and the rotation of the threaded rods further drives the adjusting block to move in the axial direction; in the sliding process of the piston, the rod body drives the limiting block to move synchronously, and the adjusting block can limit the stroke of the limiting block; when the limiting block is in contact with the adjusting block, the piston stops moving, so that accurate limiting of the stroke of the piston is realized, and the extrusion depth of the other end of the rod body is accurately controlled.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a locking hydraulic cylinder with controllable extrusion depth. Background Technology

[0002] Hydraulic cylinders, as key actuators in hydraulic systems, are widely used in engineering machinery, aerospace, metallurgical machinery, and other fields. A search revealed a Chinese patent publication number CN207961129U, which discloses a locking hydraulic cylinder with controllable extrusion depth. While this cylinder achieves controllable extrusion depth by incorporating an adjusting plate within the cylinder, and the rear cylinder's inner diameter is smaller than the adjusting plate's diameter to limit the adjusting plate's movement and prevent excessive retraction, and the added positioning rod and positioning hole structure ensure the piston always moves smoothly axially, the lack of a limiting mechanism for the adjusting plate during use prevents precise fixation. Affected by fluctuations in the internal oil pressure, as the oil pressure pushing the piston increases, the adjusting plate continues to move towards one end of the cylinder, resulting in inaccurate piston stroke adjustment. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a locking hydraulic cylinder with controllable extrusion depth, which solves the problem mentioned in the background art that the existing cylinders lack a limiting mechanism, resulting in the piston stroke not being accurately positioned.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a locking hydraulic cylinder with controllable extrusion depth, comprising a cylinder, an adjusting chamber, an adjusting block, and a threaded rod. The cylinder has an oil outlet on one side of its top, which communicates with the interior of the cylinder. An oil inlet is located on one side of the cylinder's bottom, also communicating with the interior of the cylinder. A piston is installed inside the cylinder and fitted onto the outside of the rod. One top end of the rod slides in contact with the cylinder, and one bottom end extends into the adjusting chamber. The top of the adjusting chamber is welded to the bottom of the cylinder. A limit block is welded to one bottom end of the rod. The bottom of the cylinder is rotatably connected to the top end of the threaded rod, and the outer wall of the threaded rod is threadedly connected to the interior of the adjusting block. The adjusting block is slidably connected to the outer wall of the rod.

[0005] Preferably, a first gear is welded to one end of the bottom of the threaded rod. The first gear is distributed on both sides of the second gear and meshes with the second gear. The second gear is rotatably connected to the bottom of the adjusting chamber. The second gear is connected to the knob through the rod body. Through the transmission of the knob, the second gear and the first gear, the rotation of the threaded rod can be precisely controlled. The rotation of the threaded rod further drives the adjusting block to move up and down along the rod body, thereby achieving precise limiting of the stroke of the limiting block. This allows the stroke of the piston to be precisely controlled, thereby achieving precise adjustment of the extrusion depth at the other end of the rod body.

[0006] Preferably, a first spring is provided between the adjusting block and the limiting block. The first spring is sleeved on the outside of one end of the bottom of the rod. During the piston movement, the limiting block and the adjusting block may collide. By providing the first spring between them, the impact force of the limiting block can be effectively buffered, avoiding damage to the adjusting block and the limiting block caused by hard collisions, and extending the service life of the components.

[0007] Preferably, a circular groove is provided at the bottom of the cylinder, and a second spring is provided at the bottom of the cylinder. The top of the second spring contacts the bottom of the piston. When the piston moves in the hydraulic cylinder, especially when it is near the end of its stroke, it may impact the bottom of the cylinder due to inertia or changes in oil pressure. By providing a second spring at the bottom of the cylinder, the impact force of the piston can be effectively buffered, reducing the direct impact on the bottom of the cylinder, thereby extending the service life of the cylinder.

[0008] Preferably, an observation window is provided on one side of the regulating chamber, and the observation window is fitted with transparent tempered glass. By providing an observation window with transparent tempered glass on one side of the regulating chamber, the operator can intuitively observe the movement status of the mechanical structure (such as threaded rod, regulating block, limit block, etc.) inside the regulating chamber. This allows the operator to monitor the regulating process in real time, ensuring the accuracy and reliability of the regulating action. In actual operation, the operator can intuitively see the positional relationship between the regulating block and the limit block through the observation window, thereby controlling the extrusion depth more precisely. This visualization design reduces errors that may be caused by blind operation.

[0009] This invention provides a locking hydraulic cylinder with controllable extrusion depth. It has the following beneficial effects:

[0010] (1) The locking hydraulic cylinder with controllable extrusion depth, during operation, delivers hydraulic oil through the inlet and outlet to drive the piston inside the cylinder to slide along the cylinder barrel; when the piston position needs to be fixed, the limit is achieved by locking the external hydraulic oil circuit; if the extrusion depth of one end of the cylinder rod needs to be adjusted, the piston stroke needs to be adjusted; by rotating the knob, the second gear is driven to rotate, which in turn drives the two meshing first gears to rotate synchronously; when the first gear rotates, it drives the two threaded rods connected to it to rotate, and the rotation of the threaded rods further drives the adjusting block to move axially; during the piston sliding process, the rod drives the limiting block to move synchronously, and the adjusting block can limit the stroke of the limiting block; when the limiting block contacts the adjusting block, the piston stops moving, thereby achieving precise limiting of the piston stroke, and thus accurately controlling the extrusion depth of the other end of the rod.

[0011] (2) The locking hydraulic cylinder with controllable extrusion depth has a first spring between the limit block and the adjusting block. The first spring can buffer the limit block and prevent the limit block from impacting the adjusting block and causing damage when sliding. In addition, a second spring is provided at the bottom of the cylinder to prevent the piston from impacting the bottom of the cylinder when retracting, which helps to protect the bottom of the cylinder.

[0012] This solves the problem that existing hydraulic cylinders lack a limiting mechanism, resulting in inaccurate piston stroke positioning. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the rod structure of this utility model;

[0016] Figure 4 This is a side view of the structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the hydraulic cylinder structure of this utility model.

[0018] In the diagram, 1 is the hydraulic cylinder; 2 is the oil outlet; 3 is the oil inlet; 4 is the piston; 5 is the rod; 6 is the adjusting chamber; 7 is the limit block; 8 is the adjusting block; 9 is the first gear; 10 is the second gear; 11 is the knob; 12 is the threaded rod; 13 is the first spring; 14 is the second spring; and 15 is the observation window. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1:

[0021] Please see Figure 1-5This utility model provides a technical solution: a locking hydraulic cylinder with controllable extrusion depth, including a cylinder 1, an adjusting chamber 6, an adjusting block 8, and a threaded rod 12. An oil outlet 2 is provided on one side of the top of the cylinder 1, communicating with the interior of the cylinder 1. An oil inlet 3 is provided on one side of the bottom of the cylinder 1, communicating with the interior of the cylinder 1. A piston 4 is provided inside the cylinder 1, and the piston 4 is fitted onto the outside of a rod 5. One top end of the rod 5 slides in contact with the cylinder 1, and one bottom end of the rod 5 extends into the adjusting chamber. Inside the regulating chamber 6, the top of the regulating chamber 6 is welded to the bottom of the cylinder 1. A limit block 7 is welded to one end of the bottom of the rod 5. The bottom of the cylinder 1 is rotatably connected to one end of the top of the threaded rod 12, and the outer wall of the threaded rod 12 is threadedly connected to the inside of the regulating block 8. The regulating block 8 is slidably connected to the outer wall of the rod 5. A first gear 9 is welded to one end of the bottom of the threaded rod 12. The first gear 9 is distributed on both sides of the second gear 10, and the first gear 9 meshes with the second gear 10. The second gear 10 is rotatably connected to the bottom of the regulating chamber 6. The second gear 10 passes through... The rod 5 is connected to the knob 11. When the cylinder 1 is in use, hydraulic oil is supplied through the oil inlet 3 and the oil outlet 2 to push the piston 4 inside the cylinder 1 to slide. The position of the piston 4 is fixed by locking the external hydraulic oil circuit. When it is necessary to adjust the extrusion depth of the rod 5 at one end of the cylinder 1, the stroke length of the piston 4 needs to be adjusted. By rotating the knob 11, the knob 11 can drive the second gear 10 to rotate. The rotation of the second gear 10 can drive the two first gears 9 to rotate, which in turn can drive the two threaded rods 12 to rotate. The threaded rods 12 can then adjust the position of the adjusting block 8. While the piston 4 slides, it can drive the limiting block 7 to move through the rod 5. The stroke of the limiting block 7 can be limited by the adjusting block 8. When the limiting block 7 contacts the adjusting block 8, it cannot move further, thus the stroke of the piston 4 can be precisely limited, thereby accurately adjusting the extrusion depth at the other end of the rod 5.

[0022] Example 2:

[0023] This utility model provides a technical solution: a locking hydraulic cylinder with controllable compression depth. A first spring 13 is provided between the adjusting block 8 and the limiting block 7, and the first spring 13 is fitted onto the outside of the bottom end of the rod body 5. A circular groove is opened at the bottom of the cylinder 1, and a second spring 14 is provided at the bottom of the cylinder 1, with the top of the second spring 14 contacting the bottom of the piston 4. An observation window 15 is opened on one side of the adjusting chamber 6, and transparent tempered glass is embedded inside the observation window 15. By providing the first spring 13 between the limiting block 7 and the adjusting block 8, the first spring 13 can buffer the limiting block 7, preventing the limiting block 7 from impacting the adjusting block 8 and causing damage to the adjusting block 8 when sliding. In addition, the second spring 14 is provided at the bottom of the cylinder 1 to prevent the piston 4 from impacting the bottom of the cylinder 1 when retracting, thereby helping to protect the bottom of the cylinder 1.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] 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 locking hydraulic cylinder with controllable extrusion depth, characterized in that: The utility model provides a kind of hydraulic cylinder, including oil cylinder (1), adjusting bin (6), adjusting block (8) and threaded rod (12), the oil cylinder (1) top side is provided with oil outlet (2), the oil outlet (2) is communicated with oil cylinder (1) inside, the oil cylinder (1) bottom side is provided with oil inlet (3), the oil inlet (3) is communicated with oil cylinder (1) inside, the oil cylinder (1) is provided with piston (4) inside, the piston (4) is sleeved in the outside of stem (5), the stem (5) top side is in sliding contact with oil cylinder (1) one end, and stem (5) bottom side one end extends to adjusting bin (6) inside, the stem (5) bottom side one end is welded with limit block (7), the oil cylinder (1) bottom is rotatably connected with threaded rod (12) top side one end, and threaded rod (12) outer wall is screw-connected with adjusting block (8) inside, the adjusting block (8) is slidably connected with the outer wall of stem (5).

2. The locking hydraulic cylinder with controllable extrusion depth according to claim 1, characterized in that: The threaded rod (12) bottom side one end is welded with first gear (9), the first gear (9) is distributed in the two sides of second gear (10), and the first gear (9) is engaged with second gear (10), the second gear (10) is rotatably connected with adjusting bin (6) bottom, the second gear (10) is connected with knob (11) by stem (5).

3. The locking hydraulic cylinder with controllable extrusion depth according to claim 1, characterized in that: The adjusting block (8) is provided with first spring (13) between limit block (7), the first spring (13) is sleeved in the outside of stem (5) bottom side one end.

4. The locking hydraulic cylinder with controllable extrusion depth according to claim 1, characterized in that: The oil cylinder (1) bottom is provided with second spring (14), and the oil cylinder (1) bottom is provided with second spring (14), and the second spring (14) is in contact with the bottom of piston (4).

5. The locking hydraulic cylinder with controllable extrusion depth according to claim 1, characterized in that: The adjusting bin (6) side is provided with observation window (15), and the observation window (15) is embedded with transparent toughened glass.

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