A cylinder with dynamically adjustable stroke

Abstract

The utility model relates to the technical field of oil cylinder stroke mechanism, and specifically is an oil cylinder dynamic adjustable stroke mechanism, including support, one side fixedly connected with cylinder barrel of support, one end fixedly connected with end cover of cylinder barrel, the telescopic link of sliding has in the cylinder barrel inner chamber, the stroke adjusting mechanism is lastingly connected with the movable connection of telescopic link outer wall, the piston is lastingly connected with the side fixedly connected with support of telescopic link, the cylinder barrel inner chamber is provided with the rod cavity in the side close to support, the utility model discloses through the injection of hydraulic oil of adjusting oil port, and the hydraulic oil enters the adjusting cavity through adjusting oil pipe, telescopic link inner chamber and oil pipe adjusting mouth, under the pressure action of hydraulic oil, adjusting baffle ring is located on the telescopic link and slides, and adjusting cavity increases simultaneously, the distance between adjusting baffle ring and piston increases, thereby makes the stroke change of telescopic link, and further reaches the effect that the stroke of oil cylinder is dynamically adjustable, solves the problem that oil cylinder stroke adjustment is more troublesome and stroke change is fixed value.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic cylinder stroke mechanism, specifically a hydraulic cylinder stroke mechanism with dynamic adjustment. Background Technology

[0002] As an actuator in hydraulic transmission systems, hydraulic cylinders are widely used in the field of hydraulic transmission systems. Their core principle is to drive the piston to make linear motion by the pressure of hydraulic oil, converting hydraulic energy into mechanical energy, and moving within a fixed stroke range.

[0003] Currently, when different strokes are required for similar mechanical movements, existing technologies typically use hydraulic cylinders with different strokes or add a limiting sleeve inside the hydraulic cylinder. Adding a limiting sleeve inside the hydraulic cylinder requires disassembling the hydraulic cylinder, then inserting the limiting sleeve into the hydraulic cylinder and reassembling the hydraulic cylinder. This process is quite cumbersome, and the stroke change after adding the limiting sleeve is also a fixed value. Therefore, it is necessary to propose a hydraulic cylinder with dynamically adjustable stroke mechanism. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, such as the cumbersome adjustment of hydraulic cylinder stroke and the problem that the stroke change is a fixed value, this utility model proposes a hydraulic cylinder stroke adjustment mechanism.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a hydraulic cylinder with dynamically adjustable stroke mechanism, including a support, a cylinder barrel fixedly connected to one side of the support, an end cap fixedly connected to one end of the cylinder barrel, a telescopic rod slidingly disposed in the inner cavity of the cylinder barrel, a stroke adjustment mechanism movably connected to the outer wall of the telescopic rod, a piston fixedly connected to the telescopic rod near the support side, a rodless cavity disposed in the inner cavity of the cylinder barrel near the support side, and a rod cavity disposed in the inner cavity of the cylinder barrel near the end cap side; The stroke adjustment mechanism includes an adjustment port, which is located at the bottom of the support. One end of the adjustment port is fixedly connected to an adjustment oil pipe, and one end of the adjustment oil pipe extends into the inner cavity of the telescopic rod. A gap is provided between the telescopic rod and the adjustment oil pipe. An adjustment retaining ring is slidably connected to the outer wall of the telescopic rod. An oil pipe adjustment port is provided on the outer wall of the telescopic rod. An adjustment cavity is provided in the inner cavity of the cylinder between the adjustment retaining ring and the piston rod.

[0006] Preferably, a first oil port is provided on the top of the outer wall of the cylinder near the support side, and the first oil port is connected to the rodless cavity.

[0007] Preferably, a second oil port is provided on the bottom of the outer wall of the cylinder near the end cover, and the second oil port is connected to the rod chamber.

[0008] Preferably, the outer and inner walls of the end cap are provided with a first sealing element, and the end cap seals one end of the rod cavity by cooperating with the cylinder and the telescopic rod through the first sealing element.

[0009] Preferably, the piston outer wall is provided with a second sealing element, and the piston seals one end of the rodless cavity by cooperating with the cylinder through the second sealing element.

[0010] Preferably, the outer and inner walls of the adjusting retaining ring are provided with a third sealing element, and the adjusting retaining ring seals one end of the adjusting cavity by cooperating with the cylinder and the telescopic rod through the third sealing element.

[0011] Preferably, a fourth seal is provided on the side of the piston cavity near the support, and the piston seals one end of the regulating cavity through the fourth seal in cooperation with the regulating oil pipe.

[0012] The advantages of this utility model are: This invention injects hydraulic oil through an adjusting port. The hydraulic oil enters the adjusting chamber through the adjusting oil pipe, the inner cavity of the telescopic rod, and the adjusting port of the oil pipe. Under the pressure of the hydraulic oil, the adjusting retaining ring slides on the telescopic rod, and at the same time, the adjusting chamber increases, and the distance between the adjusting retaining ring and the piston increases, thereby changing the stroke of the telescopic rod. This achieves the effect of dynamically adjusting the stroke of the hydraulic cylinder, solving the problem that the adjustment of the hydraulic cylinder stroke is relatively troublesome and the stroke change is a fixed value. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a side view of the structure of this utility model; Figure 2 This is a side sectional view of the structure of this utility model; Figure 3 This is a schematic diagram of the sliding adjustment structure of the adjusting retaining ring of this utility model; Figure 4 This is a schematic diagram of the structure for adjusting the travel of the telescopic rod of this utility model; Figure 5 This utility model Figure 4 Enlarged structural diagram of section A in the middle.

[0015] In the diagram: 1. Support; 2. Cylinder; 21. First oil port; 22. Second oil port; 23. End cap; 24. Telescopic rod; 25. First seal; 26. Piston; 27. Second seal; 28. Rodless chamber; 29. ​​Rod chamber; 3. Stroke adjustment mechanism; 31. Adjustment oil port; 32. Adjustment oil pipe; 33. Adjustment retaining ring; 34. Third seal; 35. Oil pipe adjustment port; 36. Adjustment chamber; 37. Fourth seal. Detailed Implementation

[0016] 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 scope of protection of the present utility model.

[0017] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail. This application discloses a hydraulic cylinder with dynamically adjustable stroke mechanism. (Refer to...) Figures 1-5 A hydraulic cylinder with dynamically adjustable stroke mechanism includes a support 1, a cylinder 2 fixedly connected to one side of the support 1, an end cap 23 fixedly connected to one end of the cylinder 2, a telescopic rod 24 slidingly inside the cylinder 2, a stroke adjustment mechanism 3 movably connected to the outer wall of the telescopic rod 24, a piston 26 fixedly connected to the side of the telescopic rod 24 near the support 1, a rodless cavity 28 provided in the side of the cylinder 2 near the support 1, and a rod cavity 29 provided in the side of the cylinder 2 near the end cap 23. By injecting hydraulic oil into the rod cavity 29 and the rodless cavity 28 respectively, the piston 26, the telescopic rod 24 and the stroke adjustment mechanism 3 extend and retract within the cylinder 2. When it is necessary to adjust the stroke of the telescopic rod 24, hydraulic oil is injected through the port of the stroke adjustment mechanism 3 located at the bottom of the support 1. The pressure of the hydraulic oil pushes one end of the stroke adjustment mechanism 3 to slide on the outer wall of the telescopic rod 24, thereby increasing the distance between one end of the stroke adjustment mechanism 3 and the piston 26, thus changing the extension and retraction stroke of the telescopic rod 24, thereby achieving the effect of dynamically adjusting the stroke of the telescopic rod 24. The stroke adjustment mechanism 3 includes an adjustment port 31, which is located at the bottom of the support 1. One end of the adjustment port 31 is fixedly connected to an adjustment oil pipe 32, and the other end of the adjustment oil pipe 32 extends into the inner cavity of the telescopic rod 24. A gap is provided between the telescopic rod 24 and the adjustment oil pipe 32. An adjustment retaining ring 33 is slidably connected to the outer wall of the telescopic rod 24, and an oil pipe adjustment port 35 is provided on the outer wall of the telescopic rod 24. An adjustment cavity 36 is provided in the inner cavity of the cylinder 2 between the adjustment retaining ring 33 and the piston rod 26. Hydraulic oil is injected through the adjustment port 31 and enters the adjustment cavity 36 through the adjustment oil pipe 32, the inner cavity of the telescopic rod 24, and the oil pipe adjustment port 35. Under the action of the hydraulic oil, the adjustment retaining ring 33 slides on the outer wall of the telescopic rod 24, thereby changing the distance between the adjustment retaining ring 33 and the piston 26, and thus changing the stroke of the telescopic rod 24.

[0018] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 A first oil port 21 is provided on the top of the outer wall of the cylinder 2 near the support 1. The first oil port 21 is connected to the rodless chamber 28. A second oil port 22 is provided on the bottom of the outer wall of the cylinder 2 near the end cap 23. The second oil port 22 is connected to the rod chamber 29. When hydraulic oil is injected into the first oil port 21, the hydraulic oil enters the rodless chamber 28 through the first oil port 21. Under the pressure of the hydraulic oil, the piston 26, the telescopic rod 24 and the adjusting retaining ring 33 extend outward from the cylinder 2. When hydraulic oil is injected into the second oil port 22, the hydraulic oil enters the rod chamber 29 through the second oil port 22. Under the pressure difference of the hydraulic oil, the piston 26, the telescopic rod 24 and the adjusting retaining ring 33 retract inward from the cylinder 2.

[0019] Reference Figure 2 , Figure 3 and Figure 4The end cap 23 has a first sealing element 25 on both its outer and inner walls. The end cap 23 seals the rod cavity 29 at one end by cooperating with the cylinder 2 and the telescopic rod 24 through the first sealing element 25. The piston 26 has a second sealing element 27 on its outer wall. The piston 26 seals the rodless cavity 28 at one end by cooperating with the cylinder 2 through the second sealing element 27. The adjusting retaining ring 33 has a third sealing element 34 on both its outer and inner walls. The adjusting retaining ring 33 seals the adjusting cavity 36 at one end by cooperating with the cylinder 2 and the telescopic rod 24 through the third sealing element 34. The piston 26 has a fourth sealing element 37 on the side of its inner cavity near the support 1. The piston 26 seals the adjusting cavity 36 at one end by cooperating with the adjusting oil pipe 32 through the fourth sealing element 37. When hydraulic oil is injected into the first oil port 21, the piston 26 passes through the first sealing element 27. The first seal 25 and the fourth seal 37 cooperate to seal the rodless cavity 28. Under the action of hydraulic oil, the piston 26, the telescopic rod 24 and the adjusting ring 33 can slide stably to the outside of the inner cavity of the cylinder 2. When hydraulic oil is injected into the second oil port 22, the adjusting ring 33 cooperates with the third seal 34 and the end cap 23 cooperates with the first seal 25 to seal the rod cavity 29. Under the action of hydraulic oil, the piston 26, the telescopic rod 24 and the adjusting ring 33 stably retract into the inner cavity of the cylinder 2. When hydraulic oil is injected into the adjusting oil port 31, the adjusting ring 33 seals one end of the adjusting cavity 36 through the third seal 34, and the piston 26 seals the other end of the adjusting cavity 36 through the fourth seal 37. Under the action of hydraulic oil, the adjusting ring 33 stably slides on the outer wall of the telescopic rod 24.

[0020] Working principle: During use, the support 1 is used for fixed installation. When the maximum stroke is required, the stroke adjustment mechanism 3 remains unchanged. The end cap 23 seals the inner cavity of the cylinder 2 through the first seal 25. The piston 26, telescopic rod 24, and adjusting retaining ring 33 extend and retract normally together. When the stroke needs to be adjusted, hydraulic oil is first injected through the first oil port 21. The hydraulic oil enters the rodless chamber 28. The piston 26 seals the rodless chamber 28 through the second seal 27. Under the action of the hydraulic oil, the piston 26, adjusting retaining ring 33, and telescopic rod 24 slide together to the outside of the cylinder 2. When the predetermined stroke is reached, the injection of hydraulic oil through the first oil port 21 stops. At this time, hydraulic oil is injected again through the adjusting oil port 31. The hydraulic oil enters the adjusting chamber 36 through the adjusting oil pipe 32, the inner cavity of the telescopic rod 24, and the oil pipe adjusting port 35. The adjusting retaining ring 33 extends and retracts through the third oil port 24. One end of the adjusting chamber 36 is sealed by the seal 34, and the other end of the adjusting chamber 36 is sealed by the fourth seal 37. Under the action of hydraulic oil, the adjusting retaining ring 33 is pushed and slides on the outer wall of the telescopic rod 24. When the adjusting retaining ring 33 is in contact with the end cover 23, the adjusting port 31 stops injecting hydraulic oil, and the distance between the piston 26 and the adjusting retaining ring 33 increases, thereby changing the stroke of the telescopic rod 24. At this time, the stroke adjustment of the telescopic rod 24 is completed. When the second port 22 injects hydraulic oil, the hydraulic oil enters the rod chamber 29. Under the action of hydraulic oil, the piston 26, the telescopic rod 24 and the adjusting retaining ring 33 retract together into the inner cavity of the cylinder 2. The position of the adjusting retaining ring 33 can be easily changed by injecting hydraulic oil through the adjusting port 31, thereby achieving the purpose of dynamic adjustment of the telescopic stroke of the telescopic rod 24.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A hydraulic cylinder with dynamically adjustable stroke mechanism, comprising a support (1), characterized in that: A cylinder (2) is fixedly connected to one side of the support (1), and an end cap (23) is fixedly connected to one end of the cylinder (2). A telescopic rod (24) slides in the inner cavity of the cylinder (2). A stroke adjustment mechanism (3) is movably connected to the outer wall of the telescopic rod (24). A piston (26) is fixedly connected to the side of the telescopic rod (24) near the support (1). A rodless cavity (28) is provided in the inner cavity of the cylinder (2) near the support (1), and a rod cavity (29) is provided in the inner cavity of the cylinder (2) near the end cap (23). The stroke adjustment mechanism (3) includes an adjustment port (31), which is located at the bottom of the support (1). One end of the adjustment port (31) is fixedly connected to an adjustment oil pipe (32), and one end of the adjustment oil pipe (32) extends into the inner cavity of the telescopic rod (24). A gap is provided between the telescopic rod (24) and the adjustment oil pipe (32). An adjustment retaining ring (33) is slidably connected to the outer wall of the telescopic rod (24). An oil pipe adjustment port (35) is provided on the outer wall of the telescopic rod (24). An adjustment cavity (36) is provided in the inner cavity of the cylinder (2) between the adjustment retaining ring (33) and the piston (26) rod.

2. The hydraulic cylinder dynamic stroke adjustable mechanism according to claim 1, characterized in that: The cylinder (2) has a first oil port (21) on the top of its outer wall near the support (1), and the first oil port (21) is connected to the rodless cavity (28).

3. The hydraulic cylinder dynamic stroke adjustable mechanism according to claim 1, characterized in that: The bottom of the outer wall of the cylinder (2) near the end cap (23) is provided with a second oil port (22), which is connected to the rod chamber (29).

4. The hydraulic cylinder dynamic stroke adjustment mechanism according to claim 1, characterized in that: The end cap (23) is provided with a first sealing element (25) on both its outer and inner walls. The end cap (23) seals one end of the rod cavity (29) by cooperating with the cylinder (2) and the telescopic rod (24) through the first sealing element (25).

5. The hydraulic cylinder dynamic stroke adjustment mechanism according to claim 1, characterized in that: The piston (26) has a second seal (27) on its outer wall. The piston (26) seals one end of the rodless cavity (28) with the cylinder (2) through the second seal (27).

6. The hydraulic cylinder dynamic stroke adjustment mechanism according to claim 1, characterized in that: The outer and inner walls of the adjusting ring (33) are provided with a third sealing element (34). The adjusting ring (33) seals one end of the adjusting cavity (36) by cooperating with the cylinder (2) and the telescopic rod (24) through the third sealing element (34).

7. The hydraulic cylinder dynamic stroke adjustment mechanism according to claim 1, characterized in that: The piston (26) has a fourth seal (37) on the side of the inner cavity near the support (1). The piston (26) seals one end of the regulating cavity (36) through the fourth seal (37) and the regulating oil pipe (32).

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