Stroke-adjustable hydraulic oil cylinder

Abstract

The utility model provides a hydraulic oil cylinder with an adjustable stroke, which belongs to the technical field of hydraulic oil cylinders and comprises a hydraulic oil cylinder body. The piston is connected into the hydraulic oil cylinder main body in a sliding manner; the push rod is fixedly connected to one end of the piston, and the push rod is slidably connected into the hydraulic oil cylinder body; the number of the stroke adjusting assemblies is two, each stroke adjusting assembly comprises a stroke positioning block, a screw and a threaded sleeve, and the threaded sleeve is fixedly connected to the inner wall of one side of the hydraulic oil cylinder body; by using the device, when the piston moves downwards, the piston moves to be in contact with the upper surface of the stroke positioning block at most, so that the stroke of the piston in the hydraulic oil cylinder main body is convenient to adjust, and the use is more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic oil cylinders, and in particular relates to a hydraulic oil cylinder with adjustable stroke. Background Art

[0002] The structures of hydraulic cylinders are mainly as follows: the cylinder barrel is the main part of the hydraulic cylinder, which forms a closed chamber with the cylinder head, piston and other parts to push the piston to move; the cylinder head is installed at both ends of the hydraulic cylinder and forms a tight oil chamber with the cylinder barrel; when the cylinder is working, the piston rod is subjected to thrust, tension or bending torque, etc.; and the piston rod often slides in the guide sleeve, which requires its surface roughness, straightness and roundness to be appropriate; the piston is the main component that converts hydraulic energy into mechanical energy, and its effective working area directly affects the force and movement speed of the hydraulic cylinder; the guide sleeve guides and supports the piston rod; a sealing device is installed in the guide sleeve to ensure the sealing of the rod chamber of the cylinder barrel, and a dust ring is installed on the outside to prevent impurities, dust and moisture from being brought to the sealing device and damaging the seal; the piston and piston rod have a large momentum when moving under the drive of hydraulic pressure. When entering the end cover and the bottom of the cylinder, it will cause mechanical collision, generate a large impact pressure and noise;

[0003] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When using it to achieve reciprocating motion, the reduction device can be eliminated, and there is no transmission gap, and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines; the output force of the hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device. The buffer device and the exhaust device depend on the specific application, and other devices are indispensable;

[0004] In the prior art, the piston stroke inside the hydraulic cylinder is usually fixed, the piston stroke cannot be adjusted, and the stroke of each piston movement is not easy to control, which causes certain inconveniences in use. Utility Model Content

[0005] The utility model aims to provide a hydraulic cylinder with adjustable stroke, aiming to solve the problems in the prior art that the piston stroke inside the hydraulic cylinder is usually fixed, the piston stroke cannot be adjusted, the stroke of each piston movement is difficult to control, and there are certain inconveniences in its use.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A hydraulic cylinder with adjustable stroke, comprising:

[0008] Hydraulic cylinder body;

[0009] A piston, wherein the piston is slidably connected in the hydraulic cylinder body;

[0010] A push rod, the push rod is fixedly connected to one end of the piston and is slidably connected to the main body of the hydraulic cylinder;

[0011] The stroke adjustment component is provided with two groups, each group of stroke adjustment components includes a stroke positioning block, a screw and a threaded sleeve, the threaded sleeve is fixedly connected to the inner wall of one side of the hydraulic cylinder body, the screw is threadedly connected in the threaded sleeve, the lower end of the screw movably penetrates the outer surface of the hydraulic cylinder body and extends outward, the stroke positioning block is fixedly connected to one end of the screw, and the stroke positioning block is slidably connected in the hydraulic cylinder body.

[0012] As a preferred solution of the utility model, a first flow channel and a second flow channel are respectively opened on the upper and lower sides of the inner wall of the hydraulic oil cylinder body, and sealing plugs are threadedly connected in the first flow channel and the second flow channel.

[0013] As a preferred solution of the utility model, a hydraulic channel is opened on the upper inner wall of the hydraulic cylinder body.

[0014] As a preferred solution of the utility model, a ring is integrally formed at the lower end of the push rod.

[0015] As a preferred solution of the utility model, the other ends of the two threaded sleeves are fixedly connected with a rotating block.

[0016] As a preferred solution of the present invention, the length of the screw is 7 cm.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. In this solution, by using this device, when the piston moves downward, it moves at most to contact with the upper surface of the stroke positioning block, so that the stroke of the piston in the hydraulic cylinder body is convenient to adjust and more convenient to use.

[0019] 2. In this solution, the first flow channel and the second flow channel are used to discharge and inject grease respectively, which is convenient for replacing the grease in the hydraulic cylinder body or injecting new grease. The sealing plug plays the role of sealing the first flow channel and the second flow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is the first stereogram of the utility model;

[0022] Figure 2 It is a second stereoscopic view of the utility model;

[0023] Figure 3 It is the first cross-sectional view of the utility model;

[0024] Figure 4 It is the second cross-sectional view of the present utility model.

[0025] In the figure: 1. Hydraulic cylinder body; 2. First flow channel; 3. Second flow channel; 4. Sealing plug; 5. Piston; 6. Hydraulic channel; 7. Push rod; 8. Ring; 9. Travel positioning block; 10. Screw; 11. Threaded sleeve; 12. Rotating block. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example

[0028] See also Figure 1-Figure 4 , the utility model provides the following technical solutions:

[0029] A hydraulic cylinder with adjustable stroke, comprising:

[0030] Hydraulic cylinder body 1;

[0031] A piston 5 is slidably connected to the hydraulic cylinder body 1;

[0032] A push rod 7, which is fixedly connected to one end of the piston 5 and is slidably connected to the inside of the hydraulic cylinder body 1;

[0033] The stroke adjustment assembly is provided with two groups, each group of stroke adjustment assemblies includes a stroke positioning block 9, a screw rod 10 and a threaded sleeve 11. The threaded sleeve 11 is fixedly connected to an inner wall of one side of the hydraulic cylinder body 1, the screw rod 10 is threadedly connected in the threaded sleeve 11, and the lower end of the screw rod 10 movably penetrates the outer surface of the hydraulic cylinder body 1 and extends outward. The stroke positioning block 9 is fixedly connected to one end of the screw rod 10, and the stroke positioning block 9 is slidably connected in the hydraulic cylinder body 1.

[0034] In a specific embodiment of the utility model, a push rod 7 slidably connected in the hydraulic cylinder body 1 drives the piston 5 to slide on the inner wall of the hydraulic cylinder body 1 when moving, and the oil pressure in the hydraulic cylinder body 1 is controlled by the movement of the piston 5. The stroke adjustment component is used to adjust the stroke of the piston 5 in the hydraulic cylinder body 1, and the stroke positioning block 9 is driven to move by rotating the threaded sleeve 11 to adjust the position of the stroke positioning block 9 in the hydraulic cylinder body 1. When the piston 5 moves downward, it moves at most to contact with the upper surface of the stroke positioning block 9, so that the stroke of the piston 5 in the hydraulic cylinder body 1 is convenient to adjust, which is more convenient to use.

[0035] For details, please refer to Figure 1-Figure 4 A first flow channel 2 and a second flow channel 3 are respectively provided on the upper and lower sides of the inner wall of the hydraulic cylinder body 1, and a sealing plug 4 is threadedly connected in the first flow channel 2 and the second flow channel 3.

[0036] In this embodiment: the first flow channel 2 and the second flow channel 3 are used to discharge and inject grease respectively, which is convenient for replacing the grease in the hydraulic cylinder body 1 or injecting new grease, and the sealing plug 4 plays the role of sealing the first flow channel 2 and the second flow channel 3.

[0037] For details, please refer to Figure 1-Figure 4 A hydraulic channel 6 is provided on the upper inner wall of the hydraulic cylinder body 1 .

[0038] In this embodiment, the oil pressure squeezed out by the piston 5 in the hydraulic cylinder body 1 is output to the device through the hydraulic channel 6.

[0039] For details, please refer to Figure 1-Figure 4 A circular ring 8 is integrally formed at the lower end of the push rod 7 .

[0040] In this embodiment, the integrally formed ring 8 facilitates the use of the push rod 7 .

[0041] For details, please refer to Figure 1-Figure 4 The other ends of the two threaded sleeves 11 are fixedly connected with a rotating block 12.

[0042] In this embodiment, the rotating block 12 is hexagonal, which is convenient for rotating the rotating block 12 to drive the screw rod 10 to rotate.

[0043] For details, please refer to Figure 1-Figure 4 , the length of the screw 10 is 7 cm.

[0044] In this embodiment, the screw rod 10 drives the travel positioning block 9 to move within the hydraulic cylinder body 1 by a distance of 2-7 cm.

[0045] The working principle and use process of the utility model are as follows: when the device is in use, the hydraulic channel 6 in the device is first connected to the equipment or pipeline, the control ring 8 drives the push rod 7 to move in the hydraulic cylinder body 1, and the push rod 7 drives the piston 5 to push the oil pressure in the hydraulic cylinder body 1, so that the oil pressure is pumped out from the hydraulic channel 6, and the stroke of the piston 5 in the hydraulic cylinder body 1 is controlled by the stroke adjustment component, and the rotating block 12 is rotated to drive the screw 10 to rotate in the threaded sleeve 11 to adjust the position of the stroke positioning block 9 in the hydraulic cylinder body 1. At this time, the maximum position of the piston 5 moving downward is the upper surface of the stroke positioning block 9; by using the device, when the piston 5 moves downward, it moves at most to contact with the upper surface of the stroke positioning block 9, so that the stroke of the piston 5 in the hydraulic cylinder body 1 is convenient to adjust, which is more convenient to use.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hydraulic cylinder with adjustable stroke, characterized in that: include: Hydraulic cylinder body (1); A piston (5), wherein the piston (5) is slidably connected in the hydraulic cylinder body (1); A push rod (7), wherein the push rod (7) is fixedly connected to one end of the piston (5), and the push rod (7) is slidably connected to the inside of the hydraulic cylinder body (1); A stroke adjustment component is provided in two groups, each group of the stroke adjustment components comprises a stroke positioning block (9), a screw rod (10) and a threaded sleeve (11), wherein the threaded sleeve (11) is fixedly connected to an inner wall of one side of a hydraulic cylinder body (1), the screw rod (10) is threadedly connected in the threaded sleeve (11), the lower end of the screw rod (10) movably penetrates the outer surface of the hydraulic cylinder body (1) and extends outward, the stroke positioning block (9) is fixedly connected to one end of the screw rod (10), and the stroke positioning block (9) is slidably connected in the hydraulic cylinder body (1).

2. The adjustable stroke hydraulic cylinder according to claim 1, characterized in that: A first flow channel (2) and a second flow channel (3) are respectively provided on the upper and lower sides of the inner wall of the hydraulic cylinder body (1); and sealing plugs (4) are threadedly connected in the first flow channel (2) and the second flow channel (3).

3. The adjustable stroke hydraulic cylinder according to claim 2, characterized in that: A hydraulic channel (6) is provided on the upper inner wall of the hydraulic cylinder body (1).

4. The hydraulic cylinder with adjustable stroke according to claim 3, characterized in that: A circular ring (8) is integrally formed at the lower end of the push rod (7).

5. The hydraulic cylinder with adjustable stroke according to claim 4, characterized in that: The other ends of the two threaded sleeves (11) are fixedly connected to a rotating block (12).

6. The hydraulic cylinder with adjustable stroke according to claim 5, characterized in that: The length of the screw (10) is 7 cm.

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