Leakage-free low-friction diaphragm type air cylinder

Abstract

The utility model discloses a leakage-free low-friction diaphragm type cylinder, which relates to the technical field of diaphragm type cylinders and specifically comprises a cylinder shell, a bearing cavity is arranged on the inner side wall of the cylinder shell, a through hole is arranged in the middle of the surface of one side of the cylinder shell, and a guide sleeve is connected in the through hole in the surface of one side of the cylinder shell in a penetrating manner. The inner arc face of the guide sleeve is movably connected with a dustproof ring in a sleeved mode, a piston rod is connected to the surface of one side of the dustproof ring in a penetrating mode, external threads are arranged on the outer arc face of the end, penetrating through the dustproof ring, of the piston rod, through holes are formed in the four corners of the surface of one side of the air cylinder shell, and an outer convex face is arranged on one side of the outer arc face of the front end cover, and annular corrugations are arranged on the edge of the outer convex face. In order to avoid the situation that the diaphragm is misplaced and is fixed through a bolt, so that the diaphragm is slipped and cannot move in a small range, the rear end cover is movably clamped at the annular corrugation and is movably connected with the corrugation clamping groove of the inner cambered surface, so that the rear end cover can play a role in fixing while moving due to the corrugation shape.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm type cylinders, in particular to a leakage-free and low-friction diaphragm type cylinder. Background Art

[0002] The cylinder is an important component of the pneumatic system, and its performance determines the performance of the entire pneumatic system. At present, with the in-depth development of pneumatic technology, it is required that the cylinder should minimize friction under the premise of "no leakage" or "little leakage", so that the cylinder can respond sensitively and move smoothly in any state, and there should be no creeping phenomenon in low-speed movement. This is one of the topics that researchers from all over the world are currently working hard to explore.

[0003] The diaphragm is a thin plate with concentric folds. Strictly speaking, it is a shell with a special shape. It occupies an extremely prominent position among the elastic elements of precision instruments. It is not only widely used, but also plays a core role in the instrument structure. Although the diaphragm can be fixed more firmly by multiple fixing bolts, the diaphragm completely loses the function of slight displacement. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a leak-free, low-friction diaphragm-type cylinder, which has the effects of sealing and fixing.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a leak-free, low-friction diaphragm cylinder includes a cylinder housing, the inner side wall of the cylinder housing is provided with a bearing cavity, a through hole is opened in the middle of one side surface of the cylinder housing, a guide sleeve is connected through the through hole on one side surface of the cylinder housing, a dust ring is movably sleeved on the inner arc surface of the guide sleeve, a piston rod is connected through one side surface of the dust ring, an outer arc surface of one end of the piston rod passing through the dust ring is provided with an external thread, through holes are opened at the four corners of one side surface of the cylinder housing, and fastening nuts are movably connected to the through holes at the four corners of the cylinder housing, and the The other end of the piston rod penetrates into the interior of the cylinder housing, and a buffer plunger is movably sleeved on the outer arc surface of the piston rod near the external thread, and a sealing ring is movably sleeved on the bottom of the outer arc surface of the buffer plunger. The outer arc surface of the sealing ring is movably sleeved on the through hole at the other end of the cylinder housing, and through grooves are provided in the middle of the front and rear ends of the cylinder housing. The piston rod is connected through the inner arc surface of the through groove, and a buffer plunger is installed at the rear end of the piston rod, and a sealing ring is installed in the through groove at the rear end. A dust ring is provided on the outer arc surface of the other end of the piston rod, and the outer arc surface of the dust ring is movably sleeved in the guide sleeve, thereby improving the sealing effect in the case of back and forth friction.

[0006] Optionally, a buffer throttle valve is fixedly mounted on one end of the piston rod away from the guide sleeve, and a front end cover is movably clamped on the outer arc surface of the piston rod, and the inner arc surface of the front end cover is a hollow structure.

[0007] Optionally, a bending portion is provided on the surface of the hollow structure inside the front end cover, and the number of the bending portions is two and they are distributed in a mirror-symmetrical manner, and one side surface of the two bending portions is movably overlapped on the surface of the piston rod.

[0008] Optionally, an outer convex surface is provided at the bottom of the outer arc surface of the front end cover, and an annular corrugation is provided on the circumference of the outer convex surface on one side of the front end cover, and the outer arc surface of the annular corrugation is movably connected with the rear end cover.

[0009] Optionally, the inner arc surface of the rear end cover is provided with a corrugated snap-in groove, and the inner arc surface of the corrugated snap-in groove is movably snap-connected with the annular corrugations on the peripheral side of the outer arc surface of the front end cover.

[0010] Optionally, a single-power spring is movably sleeved inside the bent portion of the inner arc surface of the front end cover, and one end of the single-power spring is fixedly mounted on an inner arc wall on one side of the rear end cover.

[0011] Optionally, the single-power spring is movably sleeved on the piston rod, and the front end cover and the rear end cover are movably connected to the built-in cavity of the cylinder housing. An outer convex surface is provided on one side of the outer arc surface of the front end cover, and an annular corrugation is provided at the edge of the outer convex surface. In order to avoid misalignment of the diaphragm and fix it with bolts, which may cause slippage and inability to move in a small range, the rear end cover is movably clamped at the annular corrugation and movably connected to the corrugated clamping groove of the inner arc surface. The corrugation enables it to play a fixing effect while displacing.

[0012] The utility model provides a leak-free, low-friction diaphragm cylinder, which has the following beneficial effects:

[0013] 1. Through grooves are provided at the middle of the front and rear ends of the cylinder housing, the piston rod is connected through the inner arc surface of the through groove, and a buffer plunger is installed at the rear end of the piston rod, and a sealing ring is installed in the through groove at the rear end, and a dust ring is provided at the outer arc surface of the other end of the piston rod, and the outer arc surface of the dust ring is movably sleeved in the guide sleeve, so as to improve the sealing effect in the case of back and forth friction.

[0014] 2. An outer convex surface is provided on one side of the outer arc surface of the front end cover, and an annular corrugation is provided at the edge of the outer convex surface. In order to avoid the diaphragm from being misaligned and fixed by bolts, which may cause thread slippage and inability to move in a small range, the rear end cover is movably clamped at the annular corrugation and movably connected with the corrugated clamping groove of the inner arc surface. The corrugation enables it to play a fixing effect while displacing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the planar cross-sectional structure of the utility model;

[0020] Figure 5 For this utility model Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0021] In the figure: 1. Cylinder housing; 2. Guide sleeve; 3. Dust ring; 4. Piston rod; 5. Buffer plunger; 6. Sealing ring; 7. Buffer throttle valve; 8. Front cover; 9. Bending part; 10. Annular corrugation; 11. Rear cover; 12. Corrugated card groove; 13. Single power spring. DETAILED DESCRIPTION

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0023] See also Figures 1 to 5The utility model provides a technical solution: a leakage-free, low-friction diaphragm cylinder, comprising a cylinder housing 1, an inner side wall of the cylinder housing 1 is provided with a bearing cavity, a through hole is opened in the middle of one side surface of the cylinder housing 1, a guide sleeve 2 is connected through the through hole on one side surface of the cylinder housing 1, a dust ring 3 is movably sleeved on the inner arc surface of the guide sleeve 2, a piston rod 4 is connected through the one side surface of the dust ring 3, an outer arc surface of the piston rod 4 that passes through the dust ring 3 is provided with an external thread, through holes are opened at the four corners of one side surface of the cylinder housing 1, fastening nuts are movably connected at the through holes at the four corners of the cylinder housing 1, the other end of the piston rod 4 passes through the interior of the cylinder housing 1, a buffer plunger 5 is movably sleeved on the outer arc surface of the piston rod 4 near the external thread, a sealing ring 6 is movably sleeved on the bottom of the outer arc surface of the buffer plunger 5, and the outer arc surface of the sealing ring 6 is movably sleeved on the through hole at the other end of the cylinder housing 1.

[0024] Through grooves are provided in the middle of the front and rear ends of the cylinder housing 1, and the piston rod 4 is connected through the inner arc surface of the through groove, and a buffer plunger 5 is installed at the rear end of the piston rod 4, and a sealing ring 6 is installed in the through groove at the rear end, and a dust ring 3 is provided on the outer arc surface of the other end of the piston rod 4, and the outer arc surface of the dust ring 3 is movably sleeved in the guide sleeve 2, so as to improve the sealing effect in the case of back and forth friction.

[0025] A buffer throttle valve 7 is fixedly installed at one end of the piston rod 4 away from the guide sleeve 2, and a front end cover 8 is movably connected to the outer arc surface of the piston rod 4. The inner arc surface of the front end cover 8 is a hollow structure, and a bending portion 9 is provided on the surface of the hollow structure inside the front end cover 8. The number of the bending portions 9 is two and they are distributed in a mirror-symmetrical manner. One side surface of the two bending portions 9 is movably overlapped on the surface of the piston rod 4, and an outer convex surface is provided at the bottom of the outer arc surface of the front end cover 8. The outer convex surface of one side of the front end cover 8 is provided with an annular corrugation 10. The outer surface of the annular corrugation 10 is provided with an annular corrugation 10. The arc surface is movably connected with the rear end cover 11, and the inner arc surface of the rear end cover 11 is provided with a corrugated clamping groove 12. The inner arc surface of the corrugated clamping groove 12 is movably clamped with the annular corrugation 10 on the peripheral side of the outer arc surface of the front end cover 8. The inner part of the bending portion 9 of the inner arc surface of the front end cover 8 is movably sleeved with a single power spring 13. One end of the single power spring 13 is fixedly mounted on the inner arc wall of one side of the rear end cover 11. The single power spring 13 is movably sleeved on the piston rod 4. The front end cover 8 and the rear end cover 11 are both movably connected to the built-in cavity of the cylinder housing 1.

[0026] An outer convex surface is provided on one side of the outer arc surface of the front end cover 8, and an annular corrugation 10 is provided at the edge of the outer convex surface. In order to avoid the diaphragm from being misaligned and being fixed by bolts, which may cause thread slippage and inability to move in a small range, the rear end cover 11 is movably clamped at the annular corrugation 10 and movably connected with the corrugated clamping groove 12 of the inner arc surface. The corrugated shape enables it to play a fixing effect while being displaced.

[0027] In the utility model, the working steps of the device are as follows:

[0028] During installation, the entire cylinder housing 1 is disassembled by fastening nuts at the four corners of the front and rear ends, and through grooves are opened in the middle of the front and rear ends of the cylinder housing 1. The piston rod 4 is connected through the inner arc surface of the through groove, and a buffer plunger 5 is installed at the rear end of the piston rod 4, and a sealing ring 6 is installed in the through groove at the rear end, and a dust ring 3 is provided at the outer arc surface of the other end of the piston rod 4, and the outer arc surface of the dust ring 3 is movably sleeved in the guide sleeve 2, so as to improve the sealing effect under the condition of back and forth friction, and secondly, the front end cover 8 is movably sleeved at the outer arc surface of the piston rod 4, and one side of the outer arc surface of the front end cover 8 is provided with an outer convex surface, and an annular corrugation 10 is provided at the edge of the outer convex surface, in order to avoid the diaphragm from being misaligned and fixed by bolts, resulting in slippage and inability to move in a small range, the rear end cover 11 is movably clamped at the annular corrugation 10, and is movably connected with the corrugated clamping groove 12 on the inner arc surface. Because of the corrugation, it can play a fixing effect while displacing.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leak-free, low-friction diaphragm cylinder, comprising a cylinder housing (1), Features: The inner wall of the cylinder housing (1) is provided with a bearing cavity, a through hole is provided in the middle of one side surface of the cylinder housing (1), a guide sleeve (2) is connected through the through hole on one side surface of the cylinder housing (1), a dust ring (3) is movably sleeved on the inner arc surface of the guide sleeve (2), a piston rod (4) is connected through one side surface of the dust ring (3), an outer arc surface of one end of the piston rod (4) that passes through the dust ring (3) is provided with an external thread, through holes are provided at four corners of one side surface of the cylinder housing (1), fastening nuts are movably connected at the through holes at the four corners of the cylinder housing (1), the other end of the piston rod (4) passes through the inside of the cylinder housing (1), a buffer plunger (5) is movably sleeved on the outer arc surface of the piston rod (4) near the external thread, a sealing ring (6) is movably sleeved on the bottom of the outer arc surface of the buffer plunger (5), and the outer arc surface of the sealing ring (6) is movably sleeved on the through hole at the other end of the cylinder housing (1).

2. A leak-free, low-friction diaphragm cylinder according to claim 1, Features: A buffer throttle valve (7) is fixedly mounted on one end of the piston rod (4) away from the guide sleeve (2); a front end cover (8) is movably clamped on the outer arc surface of the piston rod (4); and the inner arc surface of the front end cover (8) is a hollow structure.

3. A leak-free, low-friction diaphragm cylinder according to claim 2, Features: The hollow structure surface inside the front end cover (8) is provided with a bending portion (9), the number of the bending portions (9) is two and they are distributed in a mirror-symmetrical manner, and one side surface of the two bending portions (9) is movably overlapped on the surface of the piston rod (4).

4. A leak-free, low-friction diaphragm cylinder according to claim 3, Features: The bottom of the outer arc surface of the front end cover (8) is provided with an outer convex surface, and the outer convex surface of one side of the front end cover (8) is provided with an annular corrugation (10) on its circumference, and the outer arc surface of the annular corrugation (10) is movably connected with the rear end cover (11).

5. A leak-free, low-friction diaphragm cylinder according to claim 4, Features: The inner arc surface of the rear end cover (11) is provided with a corrugated snap-fit ​​groove (12), and the inner arc surface of the corrugated snap-fit ​​groove (12) is movably snap-fitted with the annular corrugation (10) on the peripheral side of the outer arc surface of the front end cover (8).

6. A leak-free, low-friction diaphragm cylinder according to claim 5, Features: A single power spring (13) is movably sleeved inside the bent portion (9) of the inner arc surface of the front end cover (8), and one end of the single power spring (13) is fixedly mounted on an inner arc wall on one side of the rear end cover (11).

7. A leak-free, low-friction diaphragm cylinder according to claim 6, Features: The single power spring (13) is movably sleeved on the piston rod (4), and the front end cover (8) and the rear end cover (11) are both movably connected to the built-in cavity of the cylinder housing (1).

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