Self-resetting multi-stage single-acting air cylinder

Abstract

The utility model relates to a self-resetting multistage single-acting air cylinder, and belongs to the technical field of pneumatic control. According to the technical scheme, the air cylinder is a multi-stage air cylinder formed by connecting three single-stage air cylinders in series, a first-stage cylinder barrel (1) is fixed to a bottom plate (9), a second-stage cylinder barrel (2) is installed in the first-stage cylinder barrel (1), a third-stage cylinder barrel (3) is installed in the second-stage cylinder barrel (2), a spring (4) is clamped between the third-stage cylinder barrel (3) and the bottom plate (9), and supporting rings (5) are arranged at the ends, close to the bottom plate (9), of the second-stage cylinder barrel (2) and the third-stage cylinder barrel (3) respectively. A second clamping spring (13) is arranged at the end, away from the bottom plate (9), of the second-stage cylinder barrel (2), a first clamping spring (12) is arranged at the end, away from the bottom plate (9), of the third-stage cylinder barrel (3), and a pneumatic connector (11) is arranged on the bottom plate (9). The air cylinder has the advantages that the application range of the air cylinder is effectively expanded, the requirements for small space and large stroke are met, and the air cylinder can return quickly by adopting the spring for resetting.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of self-resetting multistage single-acting cylinder, belong to metallurgical industry pneumatic control technical field. BACKGROUND

[0002] Cylinder is the actuating mechanism of pneumatic system, its structure is often closely related with use occasion and environment. General cylinder is composed of cylinder barrel, cylinder rod, piston, different structure transformation is carried out according to the different use environment. The cylinder used in high temperature environment can be water-cooled to the cylinder barrel;In acid and alkali environment, the cylinder barrel can be changed into high-strength corrosion-resistant plastic;In the environment of small space, the stroke of ordinary cylinder is small, generally 0.6-0.8 times of the length of cylinder itself, can satisfy daily demand, but cannot satisfy the special demand of small space and large stroke, and general multistage cylinder is two-stage cylinder, although it can realize the increase of stroke ratio, but multistage cylinder is generally single-acting cylinder, back stroke relies on gravity reset or is used in pairs, and the use scene is limited, so a cylinder with larger stroke and automatic back stroke is needed. SUMMARY

[0003] The utility model aims at providing a kind of self-resetting multistage single-acting cylinder, effectively expand the use range of cylinder, satisfy the demand of small space and large stroke, and adopt spring reset, can realize the quick back stroke of cylinder, solve the problems in the background art.

[0004] The technical scheme of the utility model is:

[0005] A kind of self-resetting multistage single-acting cylinder, the cylinder is the multistage cylinder of three single-stage cylinders in series, it includes primary cylinder barrel, secondary cylinder barrel, tertiary cylinder barrel, spring, support ring, bottom plate, pneumatic joint, snap spring one and snap spring two, primary cylinder barrel is fixed on bottom plate, secondary cylinder barrel is installed in primary cylinder barrel, tertiary cylinder barrel is installed in secondary cylinder barrel, spring is clamped between tertiary cylinder barrel and bottom plate, the end of secondary cylinder barrel and tertiary cylinder barrel close to bottom plate is equipped with support ring respectively, the end of secondary cylinder barrel away from bottom plate is equipped with snap spring two, the end of tertiary cylinder barrel away from bottom plate is equipped with snap spring one, and bottom plate is equipped with pneumatic joint.

[0006] Gap is equipped in the gap between primary cylinder barrel and secondary cylinder barrel and secondary cylinder barrel and tertiary cylinder barrel.

[0007] Primary cylinder barrel is fixed to bottom plate by fastening bolt, and sealing gasket is arranged between primary cylinder barrel and bottom plate.

[0008] The middle of bottom plate is equipped with clamping concave pit matched with spring.

[0009] The inside of bottom plate is equipped with air inlet leading to tertiary cylinder barrel, and pneumatic joint is threadedly connected to air inlet.

[0010] The secondary cylinder is provided with a groove matched with the support ring, the gasket and the snap spring, and the tertiary cylinder is provided with a groove matched with the support ring, the gasket and the snap spring.

[0011] The utility model discloses a multistage cylinder series connection structure, has long stroke ratio, can make the cylinder satisfy the demand of small space and big stroke, expands the application range of ordinary cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structure schematic diagram of the utility model;

[0013] Figure 2 It is Figure 1 the extension structure schematic diagram;

[0014] Figure 3 It is the bottom view of the utility model;

[0015] Figure 4 It is the sealing structure schematic diagram between the cylinder of the utility model;

[0016] Figure 5 It is the bottom plate top view of the utility model;

[0017] Figure 6 It is the bottom plate front view of the utility model;

[0018] In the drawing: primary cylinder 1, secondary cylinder 2, tertiary cylinder 3, spring 4, support ring 5, fastening bolt 6, gasket 7, sealing pad 8, bottom plate 9, mounting hole 10, pneumatic joint 11, snap spring one 12, snap spring two 13, groove 14, bolt hole 15, air inlet 16. DETAILED DESCRIPTION

[0019] The utility model will be further explained by examples in combination with the drawings.

[0020] Refer to the Figures 1-6 A kind of self-resetting multistage single-acting cylinder, the cylinder is by three single-stage cylinder series connection and become multistage cylinder, it includes primary cylinder 1, secondary cylinder 2, tertiary cylinder 3, spring 4, support ring 5, bottom plate 9, pneumatic joint 11, snap spring one 12 and snap spring two 13, primary cylinder 1 is fixed on bottom plate 9, secondary cylinder 2 is installed in primary cylinder 1, tertiary cylinder 3 is installed in secondary cylinder 2, spring 4 is loaded and is clamped between tertiary cylinder 3 and bottom plate 9, secondary cylinder 2 and tertiary cylinder 3 are respectively equipped with support ring 5 at one end close to bottom plate 9, secondary cylinder 2 is equipped with snap spring two 13 at one end away from bottom plate 9, tertiary cylinder 3 is equipped with snap spring one 12 at one end away from bottom plate 9, and bottom plate 9 is equipped with pneumatic joint 11.

[0021] In the embodiment, according to Figure 1 、 2 , the utility model discloses a multistage cylinder is formed by three cylinders in series, and the first cylinder barrel 1 is fixed to the bottom plate 9 through fastening bolt 6, and sealing gasket 8 is installed between the first cylinder barrel 1 and the bottom plate 9, the second cylinder barrel 2 is installed in the first cylinder barrel 1, and the second cylinder barrel 2 is used as the cylinder barrel of the second cylinder and also used as the cylinder rod of the first cylinder, the third cylinder barrel 3 is installed in the second cylinder barrel 2, and the third cylinder barrel 3 is used as the cylinder barrel of the third cylinder and also used as the cylinder rod of the second cylinder, the snap spring one 12 is installed in the snap spring slot in the upper portion of the third cylinder barrel 3, and the snap spring one 12 is used for preventing the third cylinder barrel 3 from sliding into the second cylinder barrel 2, and the snap spring two 13 is installed in the snap spring slot in the upper portion of the second cylinder barrel 2, and the snap spring two 13 is used for preventing the second cylinder barrel 2 from sliding into the first cylinder barrel 1.

[0022] According to Figure 2 、 4 , the support ring 5 is installed in the corresponding groove of the second cylinder barrel 2 and the third cylinder barrel 3 respectively, and the main function is to support the second cylinder barrel 2 and the third cylinder barrel 3 to keep balance.

[0023] The gasket 7 is installed in the corresponding groove of the second cylinder barrel 2 and the third cylinder barrel 3 respectively, and the main function is to seal the gap between the first cylinder barrel 1 and the second cylinder barrel 2 and the gap between the second cylinder barrel 2 and the third cylinder barrel 3.

[0024] According to Figure 1 、 2 , 3, the spring 4 is a tension spring, and the spring 4 is clamped between the third cylinder barrel 3 and the bottom plate 9.

[0025] According to Figure 1 、 5 , 6, the middle of the bottom plate 9 is designed with a recess 14 for clamping the spring 4, and the inside of the bottom plate 9 is designed with an air inlet 16, and the air inlet hole of the air inlet 16 is in the middle of the bottom plate 9 and the inside of the third cylinder barrel 3, for supplying air to the inside of the cylinder.

[0026] According to Figure 3 , the pneumatic connector 11 is threadedly connected to the air inlet 16 and is installed on the outside of the bottom plate 9, for connecting the external air source.

[0027] The main structure parameters of the specific implementation case are as follows:

[0028] The first cylinder barrel 1 has an outer diameter of 100mm, an inner diameter of 80mm and a length of 100mm;

[0029] The second cylinder barrel 2 has an outer diameter of 75mm, an inner diameter of 60mm and a length of 105mm;

[0030] The third cylinder barrel 3 has an outer diameter of 56mm, an inner diameter of 40mm and a length of 110mm;

[0031] Spring 4: outer diameter 30mm, wire diameter 3, length 105mm;

[0032] Support ring 5 on tertiary cylinder 3: inner diameter 55mm, outer diameter 60mm, width 5mm;

[0033] Support ring 5 on secondary cylinder 2: inner diameter 75mm, outer diameter 80mm, width 5mm;

[0034] Gleitring 7 on tertiary cylinder 3: inner diameter 49mm, outer diameter 60mm, width 4.2mm;

[0035] Gleitring 7 on secondary cylinder 2: inner diameter 69mm, outer diameter 80mm, width 4.2mm;

[0036] Sealing gasket 8: inner diameter 40mm, outer diameter 100mm, thickness 3mm, material: silicone;

[0037] Bottom plate 9: length, width, height respectively: 100mm, 100mm, 15mm;

[0038] Pneumatic joint 11: quick-mount pneumatic joint, G 1 / 4 threaded conversion Φ12;

[0039] Clamp spring 12: GB894.1 60;

[0040] Clamp spring 13: GB894.1 80.

Claims

1. A self-resetting multi-stage single-acting pneumatic cylinder, characterized by: The cylinder is a multi-stage cylinder composed of three single-stage cylinders in series, which comprises a first-stage cylinder (1), a second-stage cylinder (2), a third-stage cylinder (3), a spring (4), a support ring (5), a bottom plate (9), a pneumatic connector (11), a snap spring one (12) and a snap spring two (13), the first-stage cylinder (1) is fixed on the bottom plate (9), the second-stage cylinder (2) is installed in the first-stage cylinder (1), the third-stage cylinder (3) is installed in the second-stage cylinder (2), the spring (4) is clamped between the third-stage cylinder (3) and the bottom plate (9), the second-stage cylinder (2) and the third-stage cylinder (3) are respectively provided with the support ring (5) at one end close to the bottom plate (9), the second-stage cylinder (2) is provided with the snap spring two (13) at one end away from the bottom plate (9), the third-stage cylinder (3) is provided with the snap spring one (12) at one end away from the bottom plate (9), and the bottom plate (9) is provided with the pneumatic connector (11).

2. A self-retracting multi-stage single acting pneumatic cylinder according to claim 1, characterized in that: Gore-tex (7) is arranged in the gap between the first-stage cylinder (1) and the second-stage cylinder (2) and the gap between the second-stage cylinder (2) and the third-stage cylinder (3).

3. A self-retracting multi-stage single acting pneumatic cylinder according to claim 1, characterized in that: The first-stage cylinder (1) is fixed on the bottom plate (9) by a fastening bolt (6), and a sealing gasket (8) is arranged between the first-stage cylinder (1) and the bottom plate (9).

4. A self-retracting multi-stage single acting pneumatic cylinder according to claim 1, characterized in that: The middle of the bottom plate (9) is provided with a clamping recess (14) matched with the spring (4).

5. A self-retracting multi-stage single acting pneumatic cylinder according to claim 1, characterized in that: The inside of the bottom plate (9) is provided with an air inlet (16) leading into the third-stage cylinder (3), and the pneumatic connector (11) is threadedly connected to the air inlet (16).

6. A self-retracting multi-stage single acting pneumatic cylinder according to claim 1, characterized in that: The second-stage cylinder (2) is provided with grooves matched with the support ring (5), the Gore-tex (7) and the snap spring two (13), and the third-stage cylinder (3) is provided with grooves matched with the support ring (5), the Gore-tex (7) and the snap spring one (12).

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