Mechanical stroke-adjustable hydraulic cylinder

Abstract

The utility model relates to the technical field of hydraulic cylinders, in particular to a mechanical stroke-adjustable hydraulic cylinder. According to the technical scheme, the air cylinder comprises an air cylinder body and a piston rod arranged at one end of the air cylinder body, and further comprises an adjusting abutting sleeve arranged on the piston rod in a sliding and sleeving mode, and the air cylinder body is slidably sleeved with an adjusting embracing ring for driving the adjusting abutting sleeve to be adjusted on the piston rod; and the locking mechanism is arranged on the adjusting embracing ring and is used for fixing the adjusted position of the adjusting abutting sleeve through a manual switch. The piston rod, the adjusting abutting sleeve, the adjusting embracing ring, the locking mechanism and other structures are matched, so that the adjusting abutting sleeve achieves sliding type adjustment on the piston rod, the sliding type adjusting abutting sleeve can rapidly achieve change of the retraction length of the piston rod, the downtime of equipment is shortened, and the production efficiency is improved. Meanwhile, in some working scenes where stroke adjustment needs to be carried out for multiple times, the labor intensity of operators is greatly relieved, and convenience and rapidness are achieved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a mechanically adjustable stroke hydraulic cylinder. 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, and is widely used in the hydraulic systems of various machines. In existing technology, some hydraulic cylinders have threads on the piston rod that connect to a helical sleeve, allowing stroke adjustment by rotating the helical sleeve. However, adjusting the stroke by rotating the helical sleeve is a relatively slow process, especially when large stroke changes are required, necessitating many rotations of the helical sleeve, thus wasting considerable time. Furthermore, when frequent stroke adjustments are needed, manually rotating the helical sleeve places a significant physical strain on the operator. Utility Model Content

[0003] The purpose of this invention is to address the problem in existing hydraulic cylinders where a rotating helical sleeve is installed on the piston rod to adjust the stroke. However, adjusting the stroke by rotating the helical sleeve is time-consuming and labor-intensive. Therefore, this invention proposes a mechanically adjustable stroke hydraulic cylinder.

[0004] The technical solution of this utility model is as follows: A mechanically adjustable hydraulic cylinder includes a cylinder body and a piston rod disposed on one end of the cylinder body, and further includes: an adjusting sleeve slidably sleeved on the piston rod, and an adjusting ring slidably sleeved on the cylinder body to drive the adjusting sleeve to adjust on the piston rod; a locking mechanism is disposed on the adjusting ring to fix the adjusted position of the adjusting sleeve after manual switching.

[0005] Optionally, the locking mechanism includes a pair of protrusions fixedly connected to the outer wall of the adjusting ring, a pair of U-shaped support rods fixedly connected to the outer wall of the adjusting ring, the ends of the U-shaped support rods away from the adjusting ring being fixedly connected to the adjusting sleeve, a pair of sliding grooves being provided inside the adjusting ring, a pair of slots corresponding to and communicating with the sliding grooves being provided on both the protrusions and the adjusting ring, a pull rod being provided at the top of the adjusting ring, and a locking plate being fixedly connected to both ends of the pull rod and inserted into the slot, and a pair of racks being fixedly connected to the outer wall of the cylinder body and engaged in the sliding grooves, the racks having toothed grooves for the locking plates to engage.

[0006] Optionally, a connecting block is fixedly connected to the middle of the pull rod, an insert rod is fixedly connected to the lower surface of the connecting block, a limit block is fixedly connected to the bottom end of the insert rod, a support sleeve that fits into the insert rod is fixedly connected to the top of the adjusting ring, and a pair of limit grooves for the limit block to be inserted are provided on the support sleeve.

[0007] Optionally, a helical rod is fixedly connected to the end of the piston rod away from the cylinder body, and a nut that locks the adjusting sleeve is helically connected to the helical rod.

[0008] Optionally, a handle is fixedly connected to the top surface of the connecting block.

[0009] Optionally, the bottom of the connecting block is provided with a return spring that is movably sleeved with the support sleeve. One end of the return spring is fixedly connected to the connecting block, and the other end of the return spring is fixedly connected to the adjusting ring.

[0010] Optionally, both ends of the adjusting sleeve are fixedly connected to buffer sleeves that engage with the piston rod.

[0011] In summary, this application includes at least one of the following beneficial technical effects:

[0012] This invention utilizes the cooperation of a piston rod, adjusting sleeve, adjusting ring, and locking mechanism to enable the adjusting sleeve to slide on the piston rod for adjustment. This sliding adjusting sleeve allows for rapid changes in the piston rod's retraction length, reducing equipment downtime and improving production efficiency. Furthermore, in work scenarios requiring multiple stroke adjustments, it significantly reduces the operator's workload, providing convenience and speed. Attached Figure Description

[0013] Figure 1 A structural schematic diagram of a mechanically adjustable stroke hydraulic cylinder according to this utility model is provided;

[0014] Figure 2 for Figure 1 A partial diagram of the split structure;

[0015] Figure 3 for Figure 2 A partial cross-sectional structural diagram;

[0016] Figure 4 for Figure 3 A schematic diagram of the connection structure of the middle insertion rod, the limiting block, and the support sleeve.

[0017] Reference numerals: 1. Cylinder body; 11. Piston rod; 12. Helical rod; 13. Nut; 2. Adjusting sleeve; 21. U-shaped support rod; 22. Buffer sleeve; 3. Adjusting ring; 31. Slot; 32. Slide groove; 33. Pull rod; 34. Clamping plate; 35. Connecting block; 36. Handle; 37. Insert rod; 38. Limiting block; 39. Support sleeve; 391. Limiting groove; 392. Return spring; 301. Protrusion; 302. Rack. Detailed Implementation

[0018] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0019] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0020] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover a 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 a process, method, article, or apparatus. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example

[0025] like Figures 1 to 4 As shown, this utility model proposes a mechanically adjustable stroke hydraulic cylinder, including a cylinder body 1 and a piston rod 11 disposed at one end of the cylinder body 1. It also includes an adjusting sleeve 2 slidably sleeved on the piston rod 11. The adjusting sleeve 2 is used to lock the nut 13 on the helical rod 12, ensuring that the piston rod 11 retracts into the cylinder body 1 only according to a specified stroke. An adjusting ring 3 is slidably sleeved on the cylinder body 1, which drives the adjusting sleeve 2 to adjust on the piston rod 11.

[0026] Among them, such as Figures 1 to 3 As shown, the adjusting ring 3 is equipped with a locking mechanism. This locking mechanism, activated by a manual switch, is used to fix the adjusted position of the adjusting sleeve 2. The locking mechanism includes a pair of protrusions 301 fixedly connected to the outer wall of the adjusting ring 3. A pair of U-shaped support rods 21 are fixedly connected to the outer wall of the adjusting ring 3. The ends of the U-shaped support rods 21 away from the adjusting ring 3 are fixedly connected to the adjusting sleeve 2. A pair of sliding grooves 32 are provided inside the adjusting ring 3. These grooves 32 are used to engage the rack 302, ensuring that the adjusting ring 3 slides horizontally along the rack 302. Both the protrusions 301 and the adjusting ring 3 have a pair of slots 31 that correspond to and communicate with the sliding grooves 32.

[0027] Secondly, such as Figures 1 to 2 As shown, the top of the adjusting ring 3 is provided with a pull rod 33, and both ends of the pull rod 33 are fixedly connected to a retaining plate 34 inserted into the slot 31. A pair of racks 302 that are engaged in the sliding groove 32 are fixedly connected to the outer wall of the cylinder body 1. The racks 302 are provided with toothed grooves for the retaining plate 34 to engage. After the toothed grooves are engaged by the retaining plate 34, it is ensured that the adjusting ring 3 cannot slide on the cylinder body 1.

[0028] In addition, such as Figures 3 to 4 As shown, a connecting block 35 is fixedly connected to the middle of the pull rod 33. A handle 36 is fixedly connected to the top surface of the connecting block 35, and an insert rod 37 is fixedly connected to the lower surface of the connecting block 35. The insert rod 37 slides within the support sleeve 39, ensuring that the adjusting ring 3 can only move vertically. A limit block 38 is fixedly connected to the bottom end of the insert rod 37, and a support sleeve 39 that engages with the insert rod 37 is fixedly connected to the top of the adjusting ring 3. A pair of limit grooves 391 are provided on the support sleeve 39 for the limit block 38 to engage. The sliding of the limit block 38 within the limit grooves 391 ensures that the vertical movement of the adjusting ring 3 is equal to the height of the limit grooves 391.

[0029] It is worth noting that, such as Figure 1 As shown, a helical rod 12 is fixedly connected to one end of the piston rod 11 away from the cylinder body 1. A nut 13 that locks the adjusting sleeve 2 is helically connected to the helical rod 12. The nut 13 can be quickly installed and removed from the helical rod 12, and the nut 13 limits the stroke of the cylinder body 1 by locking the adjusting sleeve 2.

[0030] Furthermore, such as Figures 2 to 3 As shown, the bottom of the connecting block 35 is provided with a return spring 392 that is movably sleeved with the support sleeve 39. The return spring 392 is a locking mechanism that allows upward movement. After no manual pulling, the elastic tension of the return spring 392 can restore the locking mechanism to its original position for the next use. One end of the return spring 392 is fixedly connected to the connecting block 35, and the other end of the return spring 392 is fixedly connected to the adjusting ring 3.

[0031] Furthermore, such as Figure 1 As shown, both ends of the adjusting sleeve 2 are fixedly connected to buffer sleeves 22 that fit around the piston rod 11. The buffer sleeves 22 are made of rubber, which has excellent elasticity and can undergo a large degree of elastic deformation when subjected to external impact. During the operation of the hydraulic cylinder, when the piston rod 11 drives the nut 13 to press against the end of the adjusting sleeve 2, the buffer sleeves 22 are compressed and absorb the kinetic energy of the piston through their own elastic deformation, thereby slowing down the movement speed of the piston and playing a buffering role.

[0032] In this embodiment, when a mechanically adjustable hydraulic cylinder is required, simply pull the handle 36 upwards. The handle 36 moves the connecting block 35 upwards, and the connecting block 35 moves the pull rod 33. Simultaneously, the connecting block 35 moves the insertion rod 37 along the support sleeve 39, and the insertion rod 37 moves the limiting block 38 within the limiting groove 391 until the limiting block 38 moves upwards to its limit within the limiting groove 391. At this point, both ends of the pull rod 33 move the locking plate 34, causing the locking plate 34 to disengage from the position where the slot 31 and the slide groove 32 overlap. Then, the adjusting ring 3 can be slid on the cylinder body 1. The adjusting ring 3, through a pair of U-shaped support rods 21, moves the adjusting sleeve 2 on the piston rod 11 for adjustment until the adjusting sleeve 2 is adjusted to the designated position. Then, simply release the handle 36. The connecting block 35, through the elastic tension of the return spring 392, causes the connecting block 35 to sequentially move the pull rod 33 and the locking plate 34 into the slot 31. At the same time, the clamping plate 34 will also insert into the tooth groove on the rack 302, thereby preventing the adjusting ring 3 from sliding on the cylinder body 1, thus fixing the position of the adjusting sleeve 2 on the piston rod 11.

[0033] The preferred embodiments of this utility model described above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A mechanically adjustable stroke hydraulic cylinder, comprising a cylinder body (1) and a piston rod (11) disposed at one end of the cylinder body (1), characterized in that, Also includes: An adjusting sleeve (2) is slidably sleeved on the piston rod (11), and an adjusting ring (3) is slidably sleeved on the cylinder body (1) to drive the adjusting sleeve (2) to adjust on the piston rod (11); The locking mechanism is set on the adjusting ring (3) and fixed in position after adjustment by the adjusting sleeve (2) by manual switch.

2. The mechanically adjustable hydraulic cylinder according to claim 1, characterized in that, The locking mechanism includes a pair of protrusions (301) fixedly connected to the outer wall of the adjusting ring (3). A pair of U-shaped support rods (21) are fixedly connected to the outer wall of the adjusting ring (3). The ends of the U-shaped support rods (21) away from the adjusting ring (3) are fixedly connected to the adjusting sleeve (2). A pair of sliding grooves (32) are provided inside the adjusting ring (3). A pair of slots (31) corresponding to and communicating with the sliding grooves (32) are provided on both the protrusions (301) and the adjusting ring (3). A pull rod (33) is provided at the top of the adjusting ring (3). Both ends of the pull rod (33) are fixedly connected to the locking plates (34) inserted into the slots (31). A pair of racks (302) that are inserted into the sliding grooves (32) are fixedly connected to the outer wall of the cylinder body (1). The racks (302) have toothed grooves for the locking plates (34) to be inserted into.

3. The mechanically adjustable hydraulic cylinder according to claim 2, characterized in that, A connecting block (35) is fixedly connected to the middle of the pull rod (33), and an insert rod (37) is fixedly connected to the lower surface of the connecting block (35). A limit block (38) is fixedly connected to the bottom end of the insert rod (37). A support sleeve (39) that fits into the insert rod (37) is fixedly connected to the top of the adjusting ring (3). A pair of limit grooves (391) are provided on the support sleeve (39) for the limit block (38) to be inserted.

4. A mechanically adjustable stroke hydraulic cylinder according to claim 1, characterized in that, The piston rod (11) is fixedly connected to a helical rod (12) at one end away from the cylinder body (1), and a nut (13) that locks the adjusting sleeve (2) is helically connected to the helical rod (12).

5. A mechanically adjustable hydraulic cylinder according to claim 3, characterized in that, A handle (36) is fixedly connected to the top surface of the connecting block (35).

6. A mechanically adjustable hydraulic cylinder according to claim 3, characterized in that, The bottom of the connecting block (35) is provided with a return spring (392) that is movably sleeved with the support sleeve (39). One end of the return spring (392) is fixedly connected to the connecting block (35), and the other end of the return spring (392) is fixedly connected to the adjusting ring (3).

7. A mechanically adjustable hydraulic cylinder according to claim 1, characterized in that, Both ends of the adjusting sleeve (2) are fixedly connected to buffer sleeves (22) that are sleeved with the piston rod (11).

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