Multi-stage double-acting oil cylinder

Abstract

The utility model relates to the field of oil cylinders, in particular to a multi-stage double-acting oil cylinder. The oil cylinder comprises a cylinder body, a first-stage piston rod and a second-stage piston rod which are sequentially arranged in a sleeved mode from outside to inside, a first oil passing channel is formed in the left side of the cylinder body, a second oil passing channel is formed in the right side of the cylinder body, and a first-stage guide sleeve and a second-stage guide sleeve are arranged on the left side of the first-stage piston rod and the left side of the second-stage piston rod respectively. A starting switch is arranged in the third oil passing channel, and the starting switch is controlled to achieve connection and disconnection of the third oil passing channel. The starting switch is arranged in the third oil passing channel, the extending sequence of all stages of piston rods is achieved by controlling the condition that oil reaches the first-stage piston rod from the cylinder body, and the adjustability of the extending sequence of the piston rods is achieved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinders, and in particular to a multi-stage double-acting hydraulic cylinder. Background Technology

[0002] Existing multi-stage hydraulic cylinders utilize the internal circuit design to control the extension and retraction of piston rods at each stage. This results in a fixed and singular movement sequence of piston rods at each stage, making it difficult to meet different extension and retraction requirements. Therefore, a multi-stage double-acting hydraulic cylinder is needed. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a multi-stage double-acting hydraulic cylinder with the advantages of adjustable control sequence and smoother operation.

[0004] This utility model provides a multi-stage double-acting hydraulic cylinder, including a cylinder body, a first-stage piston rod, and a second-stage piston rod arranged sequentially from the outside to the inside. The cylinder body has an oil passage channel one on the left side and an oil passage channel two on the right side. The first-stage piston rod and the second-stage piston rod have a first-stage guide sleeve and a second-stage guide sleeve on their left sides, respectively. The first-stage guide sleeve has an oil passage channel three, and a start switch is provided in the oil passage channel three to control the opening and closing of the oil passage channel three.

[0005] Furthermore, the start switch includes an upper turntable, a lower turntable, and a micro rotary motor. The upper turntable is located above the lower turntable and the two are connected by the micro rotary motor. Both the upper and lower turntables are provided with through holes. The start switch is opened and closed by controlling the alignment of the through holes of the upper and lower turntables.

[0006] Furthermore, the width of the start switch is smaller than the length of the oil passage.

[0007] Furthermore, the oil passage is equipped with a stop block, and two stop blocks are respectively located on the upper and lower sides of the start switch. The upper turntable and the lower turntable are both equipped with positioning grooves on the side closest to the stop block.

[0008] Furthermore, the first-stage piston rod is provided with a flow layer, and the left side of the flow layer is provided with an opening one facing the outer ring of the first-stage piston rod, and the right side of the flow layer is provided with an opening two facing the inner side of the first-stage piston rod.

[0009] By adopting the above technical solution, the beneficial effects of this utility model are:

[0010] This invention achieves adjustable piston rod extension sequence by setting a start switch in the oil passage three and controlling the flow of oil from the cylinder to the first-stage piston rod.

[0011] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0012] Undoubtedly, such and other objects of this invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and illustrations.

[0013] To make the above and other objects, features and advantages of this utility model more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0016] 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 one or more embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0017] Figure 1 This is a side sectional view of a multi-stage double-acting hydraulic cylinder according to the present invention.

[0018] Figure 2 for Figure 1 Enlarged view of section A in the image;

[0019] Figure 3 for Figure 1 Enlarged view of section B in the image;

[0020] Figure 4 This is a side sectional view of oil passage three;

[0021] Figure 5 This is an exploded view of the start switch structure.

[0022] Explanation of key figure labels:

[0023] 1. Cylinder block;

[0024] 11. Oil passage one;

[0025] 12. Oil passage two;

[0026] 2. First-stage piston rod;

[0027] 21. Primary guide sleeve;

[0028] 211. Block;

[0029] 22. Oil passage three;

[0030] 23. Flow layer;

[0031] 231. Opening 1;

[0032] 232. Opening two;

[0033] 3. Secondary piston rod;

[0034] 31. Secondary guide sleeve;

[0035] 4. Turn on the switch;

[0036] 41. Turn the wheel up;

[0037] 42. Lower turntable;

[0038] 43. Miniature rotary motor;

[0039] 44. Through hole;

[0040] 45. Positioning groove. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0042] Reference Figure 1-5 This utility model provides a multi-stage double-acting hydraulic cylinder, which includes a cylinder body 1, a first-stage piston rod 2 and a second-stage piston rod 3 arranged sequentially from the outside to the inside.

[0043] The cylinder body 1 has an oil passage 11 on the left side and an oil passage 12 on the right side. The oil passage 11 and the oil passage 12 are used to connect to external oil cylinders. The movement control of the piston rod is achieved by controlling the oil inlet and outlet of the oil passage 11 and the oil passage 12.

[0044] The left sides of the first-stage piston rod 2 and the second-stage piston rod 3 are respectively provided with a first-stage guide sleeve 21 and a second-stage guide sleeve 31. The first-stage guide sleeve 21 is provided with an oil passage 32, which is used to inject oil into the first-stage piston rod 2 to control the movement of the second-stage piston rod 3. The oil passage 32 is provided with a start switch 4, which controls the opening and closing of the oil passage 32. Specifically, the start switch 4 includes an upper turntable 41, a lower turntable 42 and a micro rotary motor 43. The upper turntable 41 is located above the lower turntable 42 and the two are connected by the micro rotary motor 43. Both the upper turntable 41 and the lower turntable 42 are provided with through holes 44. The opening and closing of the start switch 4 is achieved by controlling the alignment of the through holes 44 of the upper turntable 41 and the lower turntable 42. To achieve bidirectional opening control of the start switch 4, the width of the start switch 4 is made smaller than the length of the oil passage. A stop block 211 is installed within the oil passage 22. Two stop blocks 211 are respectively located on the upper and lower sides of the start switch 4. The upper turntable 41 and lower turntable 42 each have a positioning groove 45 circumferentially arranged on the side closest to the stop block 211. When one side of the positioning groove 45 engages with the stop block 211, the corresponding upper turntable 41 or lower turntable 42 is fixed. A flow layer 23 is provided inside the first-stage piston rod 2. The left side of the flow layer 23 has an opening 231 facing the outer ring of the first-stage piston rod 2, and the right side of the flow layer 23 has an opening 232 facing the inner side of the first-stage piston rod 2.

[0045] Working principle: When the piston rod extends, oil is injected into the oil passage 11. At this time, the start switch 4 is opened and closed according to the extension situation. When the secondary piston rod 3 needs to extend first, the start switch 4 is opened to control the oil output of the oil passage 12. When the primary piston rod 2 needs to extend first, the start switch 4 is closed, so that the primary piston rod 2 extends first, and the piston rod returns in the same way.

[0046] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0047] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the present invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0048] Furthermore, the described features or characteristics may be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented without the aforementioned one or more specific details or may be implemented using other methods, components, materials, etc.

Claims

1. A multi-stage double-acting oil cylinder characterized by, The cylinder, the first-stage piston rod and the second-stage piston rod are sequentially sleeved from outside to inside, the left side of the cylinder is provided with an oil passage one, the right side of the cylinder is provided with an oil passage two, the left side of the first-stage piston rod and the second-stage piston rod is respectively provided with a first-stage guide sleeve and a second-stage guide sleeve, the first-stage guide sleeve is provided with an oil passage three, the oil passage three is provided with a starting switch, and the starting switch is controlled to realize the on-off of the oil passage three.

2. The multi-stage double-acting oil cylinder according to claim 1, characterized by The starting switch comprises an upper rotating disc, a lower rotating disc and a micro rotary motor, the upper rotating disc is arranged above the lower rotating disc and connected through the micro rotary motor, the upper rotating disc and the lower rotating disc are both provided with through holes, and the alignment of the through holes of the upper rotating disc and the lower rotating disc realizes the opening and closing of the starting switch.

3. The multi-stage double-acting oil cylinder according to claim 1, characterized by The width of the starting switch is less than the length of the oil passage.

4. The multi-stage double-acting oil cylinder according to claim 2, characterized by The oil passage three is provided with two blocks, the two blocks are respectively arranged on the upper side and the lower side of the starting switch, and the upper rotating disc and the lower rotating disc are both annularly provided with positioning grooves on the side close to the nearest block.

5. The multi-stage double-acting oil cylinder of claim 1, wherein, The first-stage piston rod is provided with a flow layer, the left side of the flow layer is provided with an opening one towards the outer ring of the first-stage piston rod, and the right side of the flow layer is provided with an opening two towards the inner side of the first-stage piston rod.

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