A hydraulic cylinder with easy stroke adjustment

Abstract

This utility model relates to the field of hydraulic cylinder technology and discloses a hydraulic cylinder with easy stroke adjustment. It includes an adjustment mechanism, a piston rod slidably connected inside the cylinder body, and fixed blocks slidably connected to both the front and rear ends of the cylinder body. An adjustment mechanism is provided outside the piston rod, and a cleaning mechanism is provided outside the fixed blocks. The adjustment mechanism includes a connecting plate, which is internally fixedly connected to the outside of the piston rod. A screw is threaded inside the connecting plate, and a contact ring is slidably connected to the inner wall of the connecting plate. Two protective shells are fixedly connected to the outside of the cylinder body. In this utility model, rotating the screw releases the restriction on the contact ring, and rotating the screw again restricts the contact ring again. At this time, the connecting plate can drive the contact ring to slide through the piston rod, thereby contacting the contact block and stopping the piston rod, thus achieving the stroke adjustment effect.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a hydraulic cylinder that is easy to adjust the stroke. Background Technology

[0002] The development of hydraulic cylinders began with Pascal's principle of fluid pressure transmission, and Joseph Brahman's invention of the hydraulic press in the late 18th century laid the foundation for its application. From the late 19th to the early 20th century, with the advancement of the Industrial Revolution, hydraulic cylinders gradually became widespread in the field of engineering machinery, such as excavators and cranes, to provide power output. After the mid-20th century, hydraulic cylinder technology made further breakthroughs, and advancements in materials science and manufacturing processes significantly improved its performance.

[0003] Hydraulic cylinders mainly consist of a cylinder barrel, piston, piston rod, seals, and end caps. The cylinder barrel is the main load-bearing structure. The piston divides the cylinder into two chambers. The piston rod connects the piston to the external load. Seals prevent hydraulic oil leakage. When hydraulic oil enters one chamber of the cylinder through the inlet, the fluid pressure pushes the piston, causing the piston rod to move linearly. A single-acting cylinder only has oil entering one chamber and relies on external force for return. A double-acting cylinder can alternately enter both chambers to achieve bidirectional drive.

[0004] In the existing technology, different work requirements necessitate different stroke distances for hydraulic cylinders. However, the current technology lacks a function to adjust the stroke distance of the hydraulic cylinder, meaning that a single hydraulic cylinder can only be used on one machine and cannot be quickly adjusted. This necessitates manual replacement of the hydraulic cylinder by the operator, resulting in a significant waste of time. Therefore, a hydraulic cylinder with easily adjustable stroke is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a hydraulic cylinder that facilitates stroke adjustment, aiming to improve the problem that the existing technology cannot adjust the stroke distance of the hydraulic cylinder.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A hydraulic cylinder with adjustable stroke includes a cylinder body, characterized in that: a piston rod is slidably connected inside the cylinder body, a fixing block is slidably connected to both the front and rear ends of the cylinder body, an adjustment mechanism is provided outside the piston rod, and a cleaning mechanism is provided outside the fixing block.

[0008] The adjusting mechanism includes a connecting plate, which is fixedly connected to the outside of the piston rod. A screw is threaded inside the connecting plate, and a contact ring is slidably connected to the inner wall of the connecting plate. Two protective shells are fixedly connected to the outside of the cylinder body. A fixing column is fixedly connected inside each of the two protective shells. A spring is sleeved on the outside of the fixing column, and a contact block is slidably connected to the outside of the fixing column.

[0009] As a further description of the above technical solution:

[0010] One end of the spring is fixedly connected to the inside of the contact block, and the other end of the spring is fixedly connected to the outside of the contact block;

[0011] As a further description of the above technical solution:

[0012] The connecting plate has multiple threaded holes on its exterior, and the screw rotates inside the multiple threaded holes.

[0013] As a further description of the above technical solution:

[0014] The touch ring is elliptical in shape, and the two touch blocks are symmetrically distributed on the upper and lower sides of the cylinder.

[0015] As a further description of the above technical solution:

[0016] The cleaning mechanism includes two fixed blocks 2, both of which are fixedly connected to the outside of one of the fixed blocks 1. A damper is fixedly connected inside each of the two fixed blocks 2. A spring 2 is sleeved on the outside of the damper. A limit plate is fixedly connected to the outside of the damper. A cleaning ring is fixedly connected to the drive end of the damper.

[0017] As a further description of the above technical solution:

[0018] One end of the second spring is fixedly connected to the inside of the second fixed block, and the other end of the second spring is fixedly connected to the rear end of the limiting plate;

[0019] As a further description of the above technical solution:

[0020] The inner wall of the cleaning ring is in contact with the outer side of the piston rod, and the two cleaning rings are symmetrically distributed on the outer side of the piston rod.

[0021] As a further description of the above technical solution:

[0022] The outer side of the touch ring contacts the rear end of the touch block, and the screw is threaded into the inside of the touch ring.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, by rotating the screw, the restriction on the contact ring is released, allowing the contact ring to slide on the inner wall of the connecting plate. Turning the screw in again restricts the contact ring again. At this time, the connecting plate can drive the contact ring to slide through the piston rod, thereby touching the contact block, causing the spring to contract, thus stopping the piston rod, thereby achieving the effect of stroke adjustment.

[0025] 2. In this utility model, the cleaning ring can scrape off the dirt on the outside of the piston rod by the back and forth movement of the piston rod. At the same time, the continuous extension and rebound of the spring inside the fixing block ensures that the cleaning ring is always in contact with the outside of the piston rod, thereby achieving the function of cleaning the piston rod. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a hydraulic cylinder that facilitates stroke adjustment according to the present invention.

[0027] Figure 2 This is a schematic diagram of the adjustment mechanism of a hydraulic cylinder that facilitates stroke adjustment, as proposed in this utility model.

[0028] Figure 3 This utility model presents a structural schematic diagram of a cleaning mechanism for a hydraulic cylinder with easily adjustable stroke.

[0029] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0030] Legend:

[0031] 1. Cylinder; 2. Piston rod; 3. Fixing block one; 4. Adjustment mechanism; 41. Connecting plate; 42. Screw; 43. Contact ring; 44. Protective shell; 45. Fixing column; 46. Spring one; 47. Contact block; 5. Cleaning mechanism; 51. Fixing block two; 52. Damper; 53. Spring two; 54. Limiting plate; 55. Cleaning ring. Detailed Implementation

[0032] 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.

[0033] Reference Figure 1 , Figure 2The present invention provides an embodiment of a hydraulic cylinder with adjustable stroke, comprising a cylinder body 1, a piston rod 2 slidably connected inside the cylinder body 1, the piston rod 2 performing piston movement inside the cylinder body 1, a fixing block 3 slidably connected to both the front and rear ends of the cylinder body 1, the fixing block 3 supporting and protecting the entire cylinder body 1, an adjustment mechanism 4 provided outside the piston rod 2, the adjustment mechanism 4 adjusting the stroke of the piston rod 2, and a cleaning mechanism 5 provided outside the fixing block 3 cleaning the outside of the piston rod 2.

[0034] The adjusting mechanism 4 includes a connecting plate 41, which connects the piston rod 2 and the contact ring 43, allowing the contact ring 43 to move synchronously. The connecting plate 41 is internally fixed to the outside of the piston rod 2. A screw 42 is threaded into the connecting plate 41, locking the position of the contact ring 43 on the connecting plate 41. The contact ring 43 is slidably connected to the inner wall of the connecting plate 41, disengaging from the contact block 47 as the connecting plate 41 moves. Two protective shells 44 are fixedly connected to the outside of the cylinder body 1, protecting the spring 46. A fixing post 45 is fixedly connected inside each protective shell 44, limiting the position of the contact block 47 and preventing the spring 46 from shifting. The spring 46 is sleeved on the outside of the fixing post 45. The cylinder 45 is used for direct retraction and rebound between the fixed column 45 and the contact block 47. The contact block 47 is slidably connected to the outside of the fixed column 45. The function of the contact block 47 is to contact the contact ring 43 to compress the spring 46. One end of the spring 46 is fixedly connected to the inside of the contact block 47, and the other end of the spring 46 is fixedly connected to the outside of the contact block 47. The connecting plate 41 has multiple threaded holes on its outside. The function of the multiple threaded holes is to facilitate locking the position of the adjusted screw 42. The screw 42 rotates inside the multiple threaded holes. The contact ring 43 is elliptical in shape. The purpose of the elliptical shape of the contact ring 43 is to prevent the contact ring 43 from interfering with the operation of other equipment. The two contact blocks 47 are symmetrically distributed on the upper and lower sides of the cylinder 1. The outside of the contact ring 43 contacts the rear end of the contact block 47. The screw 42 is threadedly connected to the inside of the contact ring 43.

[0035] Reference Figure 1 , Figure 3 and Figure 4The cleaning mechanism 5 includes two fixing blocks 51, which fix the position of the entire cleaning mechanism 5. Both fixing blocks 51 are externally fixed to the outside of one of the fixing blocks 3. Damperes 52 are fixedly connected inside each fixing block 51. The dampers 52 absorb and buffer the pressure inside the fixing block 51 while simultaneously pushing the cleaning ring 55. A spring 53 is sleeved on the outside of the dampers 52 to assist in the buffering action. The damper 52 is externally fixedly connected to a limiting plate 54. The function of the limiting plate 54 is to prevent the second spring 53 from sliding out of the second fixed block 51. The driving end of the damper 52 is fixedly connected to a cleaning ring 55. The function of the cleaning ring 55 is to clean the surface of the piston rod 2. One end of the second spring 53 is fixedly connected to the inside of the second fixed block 51, and the other end of the second spring 53 is fixedly connected to the rear end of the limiting plate 54. The inner wall of the cleaning ring 55 is in contact with the outside of the piston rod 2. The two cleaning rings 55 are symmetrically distributed on the outside of the piston rod 2.

[0036] Working principle: By activating the hydraulic cylinder, the piston rod 2 slides inside the cylinder body 1. As the piston rod 2 moves, it drives the connecting plate 41 to move synchronously. This pulls the contact ring 43 to move synchronously with the connecting plate 41. As the contact ring 43 continues to move, it contacts the rear ends of the two contact blocks 47, causing the contact blocks 47 to slide outside the fixed post 45. Simultaneously, the spring 46 compresses between the fixed post 45 and the contact blocks 47 until it reaches its limit, preventing the contact ring 43 from moving further. The stroke of piston rod 2 is limited. When different strokes are needed, screw 42 is turned so that it can be turned out from inside the contact ring 43, thereby releasing the restriction on the contact ring 43 and allowing the position of the contact ring 43 on the connecting plate 41 to be adjusted. When the appropriate position is reached, screw 42 is turned again to lock the position of the contact ring 43 again. At this time, when the piston rod 2 moves and the contact ring 43 touches the contact block 47, the stroke of piston rod 2 can be shortened, thereby achieving the function of adjusting the stroke.

[0037] During operation, the piston rod 2 extends and retracts inside the cylinder 1, allowing impurities to adhere to its exterior and enter the cylinder 1, potentially damaging the entire oil pump. Two cleaning rings 55 clean the exterior of the piston rod 2. Simultaneously, the spring 53 inside the fixing block 51 continuously contracts and rebounds, pushing the limiting plate 54. This ensures that the drive end of the damper 52 always keeps the cleaning rings 55 in contact with the exterior of the piston rod 2, thus achieving the effect of cleaning the exterior of the piston rod 2.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic cylinder with easy stroke adjustment comprising a cylinder body (1) characterized in that: The cylinder (1) is slidably connected to a piston rod (2), and fixed blocks (3) are slidably connected to both the front and rear ends of the cylinder (1). An adjustment mechanism (4) is provided on the outside of the piston rod (2), and a cleaning mechanism (5) is provided on the outside of the fixed blocks (3). The adjusting mechanism (4) includes a connecting plate (41), the inside of which is fixedly connected to the outside of the piston rod (2), and the inside of which is threaded with a screw (42). The inner wall of the connecting plate (41) is slidably connected with a contact ring (43). The cylinder body (1) is fixedly connected with two protective shells (44), and the inside of each of the two protective shells (44) is fixedly connected with a fixing column (45). The outside of the fixing column (45) is fitted with a spring (46), and the outside of the fixing column (45) is slidably connected with a contact block (47).

2. The hydraulic cylinder with easy stroke adjustment of claim 1, wherein: One end of the spring (46) is fixedly connected to the inside of the contact block (47), and the other end of the spring (46) is fixedly connected to the outside of the contact block (47).

3. The hydraulic cylinder with easy stroke adjustment of claim 1, wherein: The connecting plate (41) has multiple threaded holes on its exterior, and the screw (42) rotates inside the multiple threaded holes.

4. The hydraulic cylinder with easy stroke adjustment of claim 1, wherein: The touch ring (43) is elliptical in shape, and the two touch blocks (47) are symmetrically distributed on the upper and lower sides of the cylinder (1).

5. The hydraulic cylinder with easy stroke adjustment of claim 1, wherein: The cleaning mechanism (5) includes two fixing blocks (51), both of which are fixedly connected to the outside of one of the fixing blocks (3). Both fixing blocks (51) are fixedly connected to the inside of each fixing block (51). A spring (53) is sleeved on the outside of the damper (52). A limit plate (54) is fixedly connected to the outside of the damper (52). A cleaning ring (55) is fixedly connected to the driving end of the damper (52).

6. The hydraulic cylinder with easy stroke adjustment of claim 5, wherein: One end of the second spring (53) is fixedly connected to the inside of the second fixing block (51), and the other end of the second spring (53) is fixedly connected to the rear end of the limiting plate (54).

7. The hydraulic cylinder with easy stroke adjustment of claim 5, wherein: The inner wall of the cleaning ring (55) is in contact with the outside of the piston rod (2), and the two cleaning rings (55) are symmetrically distributed on the outside of the piston rod (2).

8. The hydraulic cylinder with easy stroke adjustment of claim 1, wherein: The outside of the touch ring (43) contacts the rear end of the touch block (47), and the screw (42) is threaded into the inside of the touch ring (43).

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