A die-cast hydraulic cylinder with adjustable stroke

Abstract

This utility model discloses a die-casting cylinder with adjustable stroke, including a cylinder with a stroke rod slidably connected inside. A threaded rod is rotatably connected inside the stroke rod, and a movable platform is threadedly connected to the outside of the threaded rod. Support rings are fixedly connected to both sides of the upper part of the movable platform. A connecting ring is fixedly connected to the support ring through the upper wall of the stroke rod. A rotating cap is fixedly connected to the upper part of the threaded rod through the upper part of the stroke rod. A sleeve is fitted on the outside of the rotating cap, thereby realizing the adjustment of the stroke of the cylinder, which can flexibly adapt to various working conditions and improve the versatility of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a die-cast cylinder with adjustable stroke. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, eliminates transmission backlash, and provides smooth movement, thus finding wide application in the hydraulic systems of various machines. The output force of a hydraulic cylinder is directly proportional to the effective area of ​​the piston and the pressure difference between its two sides. A hydraulic cylinder basically consists of a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a cushioning device, and a venting device. The cushioning and venting devices are optional depending on the specific application, while the other devices are essential.

[0003] Most existing hydraulic cylinders have a fixed stroke. In certain scenarios, a fixed cylinder stroke may lead to multiple limitations in functionality, economy, and reliability. This drawback is even more pronounced in scenarios that require adaptation to diverse working conditions or precise control. Utility Model Content

[0004] The purpose of this invention is to provide a die-cast hydraulic cylinder with adjustable stroke to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a die-casting cylinder with adjustable stroke, comprising a cylinder, a stroke rod slidably connected inside the cylinder, a threaded rod rotatably connected inside the stroke rod, a movable platform threadedly connected to the outside of the threaded rod, support rings fixedly connected to both sides of the upper part of the movable platform, a connecting ring fixedly connected to the support rings through the upper wall of the stroke rod, a rotating cap fixedly connected to the upper part of the threaded rod through the upper part of the stroke rod, and a sleeve fitted on the outside of the rotating cap.

[0006] Preferably, the sleeve has lifting grooves on both sides, and lifting blocks are fixedly connected to the upper two sides of the rotating cap, with the lifting blocks slidably connected inside the lifting grooves.

[0007] Preferably, a toothed ring is fixedly connected to the lower part of the housing, and a toothed groove that matches the toothed ring is formed in the middle of the upper wall of the cylinder.

[0008] Preferably, a spring is fixedly connected between the lower wall of the rotating cap and the sleeve, and the spring is sleeved on the outer side of the upper part of the threaded rod.

[0009] Preferably, the support ring has several sets of position holes inside, and the upper sides of the stroke rod have locking holes that match the position holes.

[0010] Preferably, the cross-section of the support ring is set to a semi-circular shape.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model uses a rotating housing, where the lifting block drives the rotating cap to rotate via the lifting groove, which in turn drives the threaded rod to rotate, causing the moving table to move along the inside of the stroke rod. This changes the extension distance of the support ring and the distance between the connecting ring and one end of the stroke rod, thereby adjusting the stroke of the hydraulic cylinder. This allows for flexible adaptation to diverse working conditions and improves the versatility of the equipment.

[0013] 2. This utility model also unlocks the sleeve by having the lifting block move upward along the lifting groove when the sleeve is lifted upward, causing the toothed ring to disengage from the toothed groove. When the threaded rod is rotated to the position, the sleeve is released, and the spring pushes the sleeve downward, causing the toothed ring to automatically insert into the toothed groove. This improves the convenience of operation and prevents the toothed ring from disengaging from the toothed groove by the spring, thus locking the threaded rod and preventing the cylinder stroke from changing due to arbitrary rotation of the threaded rod.

[0014] 3. This utility model also limits the stroke adjustment of the hydraulic cylinder by connecting the locking hole and the corresponding position hole through the fixing screw when the pushing pressure of the equipment is too large, thus preventing the meshing pressure between the threaded rod and the moving table from being too large when the hydraulic cylinder is working. Attached Figure Description

[0015] Figure 1 This is a first-view three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a second-view three-dimensional structural cross-sectional view of the present invention;

[0017] Figure 3 This is a cross-sectional view of the shell structure from a third-view perspective of this utility model.

[0018] In the diagram: 1. Hydraulic cylinder; 2. Stroke rod; 3. Threaded rod; 4. Moving table; 5. Support ring; 6. Connecting ring; 7. Rotating cap; 8. Sleeve; 9. Spring; 10. Lifting groove; 11. Lifting block; 12. Gear ring; 13. Gear groove; 14. Position hole; 15. Locking hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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] Please see Figure 1-3This utility model provides a technical solution: a die-casting cylinder with adjustable stroke, including a cylinder 1, a stroke rod 2 slidably installed inside the cylinder 1, a threaded rod 3 rotatably installed inside the stroke rod 2, a movable platform 4 threadedly installed on the outside of the threaded rod 3, support rings 5 ​​fixedly welded to both sides of the upper part of the movable platform 4, and a connecting ring 6 fixedly welded through the upper wall of the support rings 5 ​​and the stroke rod 2. By rotating the threaded rod 3, the movable platform 4 is driven to move along the inside of the stroke rod 2, thereby changing the extension distance of the support rings 5 ​​and the distance between the connecting ring 6 and one end of the stroke rod 2, thereby realizing the adjustment of the stroke of the cylinder 1. A rotating cap 7 is fixedly welded through the upper part of the stroke rod 2, and a sleeve 8 is sleeved on the outside of the rotating cap 7. The rotation of the threaded rod 3 can be controlled from the outside by rotating the sleeve 8 and the rotating cap 7.

[0021] The sleeve 8 has lifting grooves 10 on both sides. Lifting blocks 11 are fixedly welded to the upper sides of the rotating cap 7. The lifting blocks 11 are slidably installed inside the lifting grooves 10, enabling the sleeve 8 to drive the rotating cap 7 to rotate and to lift it upwards. A toothed ring 12 is fixedly welded to the lower part of the sleeve 8. A toothed groove 13 that matches the toothed ring 12 is opened in the middle of the upper wall of the cylinder 1. When the sleeve 8 is lifted upwards, the toothed ring 12 disengages from the toothed groove 13, which unlocks the sleeve 8 and allows the threaded rod 3 to rotate. A spring 9 is fixedly welded between the lower wall of the rotating cap 7 and the sleeve 8. The spring 9 is sleeved on the upper outer side of the threaded rod 3. When the sleeve 8 moves upwards, it compresses the spring 9. When the threaded rod 3 rotates to the correct position, it releases the sleeve. The shell 8 and spring 9 push the shell 8 downward, so that the toothed ring 12 automatically inserts into the toothed groove 13, improving the convenience of operation and preventing the toothed ring 12 from arbitrarily disengaging from the toothed groove 13. The support ring 5 has several sets of position holes 14 inside, and the upper sides of the stroke rod 2 have locking holes 15 that match the position holes 14. When the pushing pressure of the equipment is too high, the locking hole 15 and the corresponding position hole 14 are connected by the fixing screw. Although the stroke adjustment of the oil cylinder 1 is limited, it can prevent the meshing pressure between the threaded rod 3 and the moving table 4 from being too high when the oil cylinder 1 is working. The cross-section of the support ring 5 is set as a semi-arc, which can ensure that the support area of ​​the support ring 5 is large enough and improve the support force of the support ring 5.

[0022] Working principle: When the housing 8 is lifted, the lifting block 11 moves upward along the lifting groove 10, causing the toothed ring 12 to disengage from the toothed groove 13, thus unlocking the housing 8. By rotating the housing 8, the lifting block 11 drives the rotating cap 7 to rotate through the lifting groove 10, which in turn drives the threaded rod 3 to rotate, causing the moving platform 4 to move along the inside of the stroke rod 2. This changes the extension distance of the support ring 5 and the distance between the connecting ring 6 and one end of the stroke rod 2, thereby adjusting the stroke of the hydraulic cylinder 1. When the threaded rod 3 is rotated to the correct position, the housing 8 is released, and the spring 9 pushes the housing 8 downward, causing the toothed ring 12 to automatically insert into the toothed groove 13, improving the convenience of operation. The spring 9 also prevents the toothed ring 12 from arbitrarily disengaging from the toothed groove 13. When the pushing pressure of the equipment is too high, the locking hole 15 and the corresponding position hole 14 are connected by the fixing screw. Although this limits the stroke adjustment of the hydraulic cylinder 1, it also prevents the meshing pressure between the threaded rod 3 and the moving platform 4 from being too high during operation.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A die-casting cylinder with adjustable stroke, comprising a cylinder (1), characterized in that: The cylinder (1) is slidably connected to a stroke rod (2), and the stroke rod (2) is rotatably connected to a threaded rod (3). The threaded rod (3) is threadedly connected to a moving platform (4) on the outside. The upper two sides of the moving platform (4) are fixedly connected to support rings (5). The support rings (5) penetrate the upper wall of the stroke rod (2) and are fixedly connected to a connecting ring (6). The upper part of the threaded rod (3) penetrates the upper part of the stroke rod (2) and is fixedly connected to a rotating cap (7). The rotating cap (7) is fitted with a sleeve (8) on the outside.

2. The adjustable-stroke die-cast hydraulic cylinder according to claim 1, characterized in that: The casing (8) has lifting grooves (10) on both sides, and lifting blocks (11) are fixedly connected to the upper two sides of the rotating cap (7). The lifting blocks (11) are slidably connected inside the lifting grooves (10).

3. The adjustable-stroke die-cast hydraulic cylinder according to claim 1, characterized in that: The lower part of the casing (8) is fixedly connected to a toothed ring (12), and the upper wall of the oil cylinder (1) is provided with a toothed groove (13) that matches the toothed ring (12).

4. The adjustable-stroke die-cast hydraulic cylinder according to claim 1, characterized in that: A spring (9) is fixedly connected between the lower wall of the rotating cap (7) and the sleeve (8), and the spring (9) is sleeved on the upper outer side of the threaded rod (3).

5. The adjustable-stroke die-casting cylinder according to claim 1, characterized in that: The support ring (5) has several sets of position holes (14) inside, and the upper sides of the stroke rod (2) have locking holes (15) that match the position holes (14).

6. The adjustable stroke die-casting cylinder according to claim 1, characterized in that: The cross-section of the support ring (5) is set to a semi-circular shape.

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