Supporting cylinder

Abstract

The utility model relates to the technical field of air cylinders, in particular to a supporting cylinder which comprises a cylinder body, an air inlet portion is arranged on the cylinder body, a supporting rod is movably inserted in the cylinder body and used for supporting a specified object, and a jacket assembly is sleeved on the outer side of the supporting rod. A first-stage piston is movably arranged in the cylinder body, so that the movement of the first-stage piston is suitable for driving the jacket assembly to clamp the supporting rod; wherein the first-stage piston is sequentially provided with a straight body position and a push-down surface from top to bottom, and an annular space is formed between the straight body position and the inner wall of the cylinder body; the inner wall of the cylinder body is provided with a first limiting step located above the downward pushing surface, an annular partition plate is arranged in the annular space in a sealed mode, and the annular partition plate is arranged between the first limiting step and the downward pushing surface in a sliding mode; the air inlet part is suitable for communicating with a first air pressure cavity formed between the annular partition plate and the push-down surface.

Description

Technical Field

[0001] This utility model relates to the field of cylinder technology, specifically to a support cylinder. Background Technology

[0002] Current piston support cylinders generally adopt a fixed and separated structure to achieve airflow isolation and diversion between pistons. For example, the piston is machined into a stepped shape, thus having two airflow pushing surfaces, which makes its machining and assembly more difficult. Utility Model Content

[0003] To address the challenges of machining and assembling current piston support cylinders, this invention provides a support cylinder.

[0004] The technical solution of this utility model is as follows:

[0005] On the one hand, this utility model provides a support cylinder, including

[0006] The cylinder has an air intake section, and a support rod is movably inserted into the cylinder. A jacket assembly is sleeved on the outside of the support rod.

[0007] A primary piston, movably disposed within the cylinder body, is adapted to drive the clamping assembly to clamp the support rod; characterized in that:

[0008] The first-stage piston is provided with a straight body and a downward thrust surface in sequence, and there is an annular space between the straight body and the inner wall of the cylinder; the inner wall of the cylinder is provided with a first limiting step located above the downward thrust surface;

[0009] It also includes an annular partition, which is slidably and sealed within the annular space and located between the first limiting step and the downward pushing surface; the air intake is adapted to connect to the first air pressure chamber formed between the annular partition and the downward pushing surface.

[0010] Furthermore, a secondary piston is provided in the cylinder body, and a stop portion is provided on the outer side of the primary piston corresponding to the secondary piston. The stop portion is located on the side of the secondary piston facing the bottom of the cylinder body. A second air pressure chamber is provided between the secondary piston and the inner top of the cylinder body. The air intake portion can also communicate with the second air pressure chamber.

[0011] Furthermore, the secondary piston is located within the annular space; the stop is configured as a step formed on the straight body; the stop at least covers a portion of the secondary piston.

[0012] Furthermore, a force-multiplying component is provided within the annular space, and the air intake provides air pressure to the force-multiplying component to drive the first-stage piston.

[0013] Furthermore, the force-multiplying assembly includes an upper sealing partition and a lower sealing partition disposed opposite to each other; a first limiting part is provided on the straight body position below the lower sealing partition; a second limiting part is provided on the inner wall of the cylinder above the upper sealing partition; and the air intake is adapted to connect a third air pressure chamber between the upper sealing partition and the lower sealing partition.

[0014] Furthermore, the second limiting part is configured as a second limiting step formed on the inner wall of the cylinder; the first limiting part is configured as a third limiting step formed on the straight body.

[0015] Furthermore, both the upper sealing partition and the lower sealing partition are slidably disposed within the annular space.

[0016] Furthermore, the force-multiplying components are configured in at least two sets.

[0017] Furthermore, the cylinder body includes a housing and a base installed at the bottom of the housing; a cylindrical cavity is opened at the bottom of the base to connect with the air intake; a thrust piston is fitted inside the cylindrical cavity, and the thrust piston is connected to the support rod; an air passage is opened inside the side wall of the first-stage piston; the first end of the air passage is connected to the cylindrical cavity, and the second end of the air passage is connected to the first air pressure chamber.

[0018] Furthermore, a first elastic reset element is provided between the primary piston and the base, and / or a second elastic reset element is provided on the side of the thrust piston facing the support rod.

[0019] The beneficial effects achieved by this utility model are as follows:

[0020] The support cylinder of this utility model includes a primary piston, which has a straight body and a downward pushing surface arranged sequentially from top to bottom. There is an annular space between the straight body and the inner wall of the cylinder. The periphery of the downward pushing surface is attached to the inner wall of the cylinder. The inner wall of the cylinder is provided with a first limiting step located above the downward pushing surface. An annular partition is slidably sealed within the annular space, and the annular partition is located between the first limiting step and the downward pushing surface. An air inlet is adapted to connect to a first pressure chamber formed between the annular partition and the downward pushing surface. In use, the air inlet connects to the first pressure chamber and allows air to enter. The annular partition moves upward until it is blocked by the first limiting step. At the same time, air continuously enters the first pressure chamber to act on the downward pushing surface, thereby pushing the primary piston to move downward. The downward movement of the primary piston pushes the jacket assembly to clamp the support rod and lock the extended position of the support rod. Meanwhile, the movable annular partition is easy to install from one end of the cylinder, and its processing and assembly difficulty is lower than that of a fixed partition structure. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0024] Figure 1 This is a three-dimensional structural diagram of an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the main view structure of an embodiment of this application;

[0026] Figure 3 yes Figure 2 Sectional view along AA;

[0027] Figure 4 yes Figure 3 A magnified structural diagram at point B;

[0028] Figure 5 This is a cross-sectional structural diagram of another embodiment of this application.

[0029] In the picture,

[0030] 100. Cylinder block; 200. First-stage piston; 300. Annular partition; 400. Second-stage piston; 500. Force-multiplying push assembly; 600. Support rod; 700. Jacket assembly; 800. First elastic reset member; 900. Second elastic reset member; 110. Air intake; 120. Annular space; 130. First limiting step; 140. First air pressure chamber; 150. Second air pressure chamber; 160. Second limiting step; 170. Housing; 180. Base; 181. Cylindrical cavity; 182. Thrust piston; 190. Third air pressure chamber; 210. Straight body position; 220. Lower push surface; 230. Stop part; 240. Third limiting step; 250. Air passage; 510. Upper sealing partition; 520. Lower sealing partition. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0033] For ease of description, spatial relative terms may be used in this text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in this text will be interpreted accordingly.

[0034] This application discloses a support cylinder, including a cylinder body 100, an air inlet 110 on the cylinder body 100, and a support rod 600 movably inserted into the cylinder body 100 for supporting a designated object. A clamping assembly 700 is sleeved on the outer side of the support rod 600. A primary piston 200 is movably disposed within the cylinder body 100, such that the movement of the primary piston 200 is adapted to drive the clamping assembly 700 to clamp the support rod 600. The primary piston 200 has, from top to bottom, a straight section 2. An annular space 120 is formed between the cylinder body 10 and the lower push surface 220, and between the straight body 210 and the inner wall of the cylinder body 100; the inner wall of the cylinder body 100 is provided with a first limiting step 130 located above the lower push surface 220; an annular partition 300 is sealed in the annular space 120, and the annular partition 300 is slidably disposed between the first limiting step 130 and the lower push surface 220; the air intake 110 is adapted to connect the first air pressure chamber 140 formed between the annular partition 300 and the lower push surface 220.

[0035] In this embodiment, the support cylinder includes a cylinder body 100, an air intake 110 for air intake to provide a power source, a support rod 600 is movably inserted into the cylinder body 100, and a clamping assembly 700 is sleeved on the outside of the support rod 600 for clamping the support rod 600; a first-stage piston 200 is movably disposed within the cylinder body 100, and the first-stage piston 200 can be disposed outside the clamping assembly 700. When the first-stage piston 200 moves, it can drive the clamping assembly 700 to clamp the support rod 600, thereby clamping the support rod 600. The position of the support rod 600 is locked relative to the extended position of the cylinder 100; when the first-stage piston 200 moves in the reverse direction, the jacket assembly 700 can be driven to release the position lock of the support rod 600; wherein, the first-stage piston 200 is provided with a straight body position 210 and a downward pushing surface 220 from top to bottom, and there is an annular space 120 between the straight body position 210 and the inner wall of the cylinder 100, and the periphery of the downward pushing surface 220 is attached to the inner wall of the cylinder 100, and the inner wall of the cylinder 100 is provided with a first limiting step 1 located above the downward pushing surface 220. 30; An annular partition 300 is slidably sealed within the annular space 120, and the annular partition 300 is located between the first limiting step 130 and the lowering surface 220. The air inlet 110 is adapted to connect with the first pressure chamber 140 formed between the annular partition 300 and the lowering surface 220. In use, the air inlet 110 connects with the first pressure chamber 140 and allows air to enter it. The annular partition 300 moves upward until it is blocked by the first limiting step 130. At the same time, air continuously enters the first pressure chamber 140 to act. The downward push surface 220 pushes the first-stage piston 200 downward, and the downward movement of the first-stage piston 200 pushes the jacket assembly 700 to clamp the support rod 600 to lock the extended position of the support rod 600. At the same time, the movable annular partition 300 is easy to install from one end of the cylinder body 100. Compared with the fixed partition structure, it is easier to process and assemble. Moreover, the movable annular partition 300 can be set into several stages according to the actual situation, breaking through the limitation of the piston thrust level of the fixed partition structure.

[0036] Optionally, the first limiting step 130 is configured as an annular step to stop the annular partition 300.

[0037] In an optional or preferred embodiment, when the air intake 110 is intake, it first pushes the support rod 600 upward to a designated position before allowing the airflow to enter the first air pressure chamber 140. This allows the support rod 600 to be moved and then locked.

[0038] One example of the implementation is as follows: The cylinder body 100 includes a housing 170 and a base 180 installed at the bottom of the housing 170; a cylindrical cavity 181 is opened at the bottom of the base 180 to connect to the air intake 110, and a thrust piston 182 is fitted inside the cylindrical cavity 181, and the thrust piston 182 is connected to the support rod 600; an air passage 250 is opened inside the side wall of the first-stage piston 200; the first end of the air passage 250 is connected to the cylindrical cavity 181, and the second end of the air passage 250 is connected to the first air pressure chamber 140.

[0039] In this embodiment, in the initial position, the thrust piston 182 blocks the connection between the air passage 250 and the cylindrical cavity 181, thereby disconnecting the air intake 110 from the first pressure chamber 140. When the embodiment of this application needs to work, the air intake 110 takes in air, and the airflow lifts the thrust piston 182, thereby driving the support rod 600 to move upward until the thrust piston 182 releases the obstruction of the first end of the air passage 250. At this time, the airflow can enter the first pressure chamber 140 through the air passage 250, and the airflow acts on the downward push surface 220 to push the first stage piston 200 downward.

[0040] Optionally, the housing 170 and the base 180 are detachably connected.

[0041] In an optional or preferred embodiment, a first elastic reset member 800 is provided between the first-stage piston 200 and the base 180 so that the first-stage piston 200 can be reset when the air pressure is removed.

[0042] In an optional or preferred embodiment, in order to avoid creating a vacuum and ensure the normal movement of the annular partition 300, a vent hole can be provided at the corresponding position of the straight body 210 to connect to the outside. This is a conventional technique and can be set according to the actual situation, and will not be described in detail here.

[0043] In an optional or preferred embodiment, a second elastic reset member 900 is provided on the side of the thrust piston 182 facing the support rod 600, and the second elastic reset member 900 is disposed in the cylindrical cavity 181 to help the support rod 600 and the thrust piston 182 reset.

[0044] Optionally, both the first elastic reset member 800 and the second elastic reset member 900 can be configured as springs.

[0045] The jacket assembly 700 is a conventional technology. It can be clamped or released by the up and down movement of the first-stage piston 200. It will not be described in detail here.

[0046] In an optional or preferred embodiment, the push-down surface 220 has an inclined surface so that the first air pressure chamber 140 is always present; alternatively, the bottom surface of the annular partition 300 may also have an inclined surface so that the first air pressure chamber 140 is always present. It can be seen that as long as the shape of the push-down surface 220 and the annular partition 200 are not completely matched, the first air pressure chamber 140 can always be present. Therefore, this should not be regarded as a limitation of this solution, but is only given for ease of understanding.

[0047] In an optional or preferred embodiment, a secondary piston 400 is provided inside the cylinder body 100, and a stop portion 230 is provided on the outer side of the primary piston 200. The stop portion 230 is located on the side of the secondary piston 400 facing the bottom of the cylinder body 100. A second air pressure chamber 150 is provided between the secondary piston 400 and the inner top of the cylinder body 100. The air intake portion 110 can also communicate with the second air pressure chamber 150.

[0048] In this embodiment, by setting the secondary piston 400, the air intake 110 can communicate with the second pressure chamber 150. When the airflow of the air intake 110 enters the second pressure chamber 150, the airflow pushes the secondary piston 400 downward. The secondary piston 400 exerts a downward force on the primary piston 200 through the stop part 230. This, combined with the force of the airflow in the first pressure chamber 140 on the downward pushing surface 220, has a multiplier effect.

[0049] In an optional or preferred embodiment, the secondary piston 400 is located within the annular space 120; the stop portion 230 is configured as a step formed on the straight body position 210; the stop portion 230 at least covers a portion of the secondary piston 400; the secondary piston 400 is movably disposed within the annular space 120, opposite to the annular partition 300, which facilitates its own processing, production and assembly.

[0050] In an optional or preferred embodiment, a force-multiplying component 500 is provided in the annular space 120. The air intake 110 provides air pressure to the force-multiplying component 500 so that it drives the first-stage piston 200 to move. The force-multiplying component 500 achieves the effect of further increasing the thrust, and its placement in the annular space 120 can further reduce the difficulty of its processing and assembly.

[0051] In an optional or preferred embodiment, the force-multiplying assembly 500 includes an upper sealing partition 510 and a lower sealing partition 520 disposed opposite to each other; both the upper sealing partition 510 and the lower sealing partition 520 are slidably disposed within the annular space 120, which can be understood as moving up and down; a first limiting part located below the lower sealing partition 520 is provided on the straight body 210; a second limiting part located above the upper sealing partition 510 is provided on the inner wall of the cylinder 100; the air intake 110 is adapted to connect to a third air pressure chamber 1 between the upper sealing partition 510 and the lower sealing partition 520. 90; The upper sealing partition 510 and the lower sealing partition 520 are movable to form a third air pressure chamber 190. After the third air pressure chamber 190 is filled with air, the upper sealing partition 510 moves upward, while the lower sealing partition 520 pushes the first-stage piston 200 downward to provide a greater downward pushing force. With the arrangement of the first air pressure chamber 140 and the second air pressure chamber 150, the limitation of the fixed structure that can only set two-stage piston thrust is broken. Moreover, the movable upper sealing partition 510 and the lower sealing partition 520 only need to be assembled into the chamber in sequence, which greatly reduces the assembly difficulty.

[0052] In an optional or preferred embodiment, the airway 250 is connected to the first pressure chamber 140, the second pressure chamber 150 and the third pressure chamber 190 respectively.

[0053] In an optional or preferred embodiment, the inner wall of the cylinder 100 is provided with a second limiting step 160 located above the upper sealing partition 510; the first limiting part is set as a third limiting step; the inner wall of the cylinder 100 in the annular space 120 and the straight body 210 are processed according to requirements, which is beneficial to its processing and production and improves efficiency.

[0054] Optionally, the force-multiplying assembly 500 is configured in at least two sets to provide greater force while overcoming the limitations of a fixed piston structure.

[0055] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0056] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0057] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. Support cylinder, including The cylinder (100) has an air intake (110), and a support rod (600) is movably inserted into the cylinder (100). A jacket assembly (700) is sleeved on the outside of the support rod (600). A primary piston (200) is movably disposed within the cylinder (100) to drive the clamping assembly (700) to clamp the support rod (600); characterized in that: The first-stage piston (200) is provided with a straight body (210) and a downward thrust surface (220) in sequence, and there is an annular space (120) between the straight body (210) and the inner wall of the cylinder (100); the inner wall of the cylinder (100) is provided with a first limiting step (130) located above the downward thrust surface (220). It also includes an annular partition (300), which is slidably sealed within the annular space (120) and located between the first limiting step (130) and the lowering surface (220); the air intake (110) is adapted to connect the first air pressure chamber (140) formed between the annular partition (300) and the lowering surface (220).

2. The support cylinder according to claim 1, characterized in that: A secondary piston (400) is provided inside the cylinder body (100). A stop (230) is provided on the outer side of the primary piston (200) corresponding to the secondary piston (400). The stop (230) is located on the side of the secondary piston (400) facing the bottom of the cylinder body (100). A second air pressure chamber (150) is provided between the secondary piston (400) and the inner top of the cylinder body (100). The air intake (110) can also communicate with the second air pressure chamber (150).

3. The support cylinder of claim 2, wherein: The secondary piston (400) is located within the annular space (120); the stop (230) is configured as a step on the straight body (210); the stop (230) covers at least a portion of the secondary piston (400).

4. The support cylinder of claim 1, wherein: A force-multiplying assembly (500) is provided in the annular space (120), and the air intake (110) provides air pressure to the force-multiplying assembly (500) so that it drives the first-stage piston (200) to move.

5. The support cylinder of claim 4, wherein: The force-multiplying assembly (500) includes an upper sealing partition (510) and a lower sealing partition (520) disposed opposite to each other; a first limiting part is provided on the straight body (210) below the lower sealing partition (520); a second limiting part is provided on the inner wall of the cylinder (100) above the upper sealing partition (510); the air intake (110) is adapted to connect a third air pressure chamber (190) between the upper sealing partition (510) and the lower sealing partition (520).

6. The support cylinder of claim 5, wherein: The second limiting part is configured as a second limiting step (160) opened on the inner wall of the cylinder (100); the first limiting part is configured as a third limiting step (240) opened on the straight body (210).

7. The support cylinder of claim 6, wherein: Both the upper sealing partition (510) and the lower sealing partition (520) are slidably disposed within the annular space (120).

8. A support cylinder according to any one of claims 4-7, characterized in that: The force-multiplying components (500) are configured in at least two sets.

9. A support cylinder according to any one of claims 1-7, characterized in that: The cylinder body (100) includes a housing (170) and a base (180) installed at the bottom of the housing (170); a cylindrical cavity (181) is opened at the bottom of the base (180) to connect to the air intake (110); a thrust piston (182) is fitted inside the cylindrical cavity (181), and the thrust piston (182) is connected to the support rod (600); an air passage (250) is opened inside the side wall of the first-stage piston (200); the first end of the air passage (250) is connected to the cylindrical cavity (181), and the second end of the air passage (250) is connected to the first air pressure chamber (140).

10. The support cylinder of claim 9, wherein: A first elastic reset member (800) is provided between the first-stage piston (200) and the base (180) and / or a second elastic reset member (900) is provided on the side of the thrust piston (182) facing the support rod (600).

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