Rotary cylinder

Abstract

The utility model belongs to the technical field of air cylinders, and particularly relates to a rotary air cylinder which comprises a cylinder body, an upper cylinder cover and a lower cylinder cover are arranged at the upper end and the lower end of the cylinder body respectively, and an upper vent hole and a lower vent hole which are communicated with the interior of the cylinder body are formed in the upper cylinder cover and the lower cylinder cover respectively. A lead screw rotating shaft is rotationally connected between the upper cylinder cover and the lower cylinder cover in a sealed mode, the two ends of the lead screw rotating shaft extend out of the upper cylinder cover and the lower cylinder cover respectively, a flange piston is slidably connected into the cylinder body in a sealed mode, the flange piston is in threaded connection with the lead screw rotating shaft, and a plurality of guide columns penetrate through the flange piston in a sliding mode. The two ends of each guide column are detachably connected with the upper cylinder cover and the lower cylinder cover respectively.

Description

Technical Field

[0001] The utility model belongs to the technical field of cylinders, in particular to a rotary cylinder. Background Art

[0002] A rotary cylinder is a device that converts air pressure energy into mechanical energy. It mainly uses the piston in the cylinder to make linear motion under the action of air pressure, and then converts it into rotational motion of the shaft to output torque. It has the characteristics of compact structure, large output torque, smooth and reliable movement, etc., and has therefore been widely used in the field of industrial automation.

[0003] A Chinese utility model patent application numbered CN201820768667.X discloses a rotary cylinder comprising a cylinder body, an end cover, a piston rod, a piston, and a guide assembly. The end cover is disposed on the cylinder body to seal the cylinder body, the piston rod is slidably disposed within the cylinder body, the piston is slidably disposed within the cylinder body and disposed on the piston rod, the guide assembly is sleeved on the piston rod to guide the movement of the piston rod, a first vent hole, a second vent hole, a third vent hole, and a fourth vent hole are formed through the circumferential wall of the cylinder body, the end cover comprises a first end cover and a second end cover, and the first end cover is formed through a through hole. Although the rotary cylinder can move axially to output a doubled force, the through hole is only formed at one end of the piston rod, and therefore has only one power output end, which cannot meet the special use requirements of certain dual power output ends. Moreover, the piston stroke is fixed and cannot be adjusted according to actual use requirements.

[0004] Therefore, there is an urgent need to improve the existing rotary cylinder and provide a rotary cylinder with adjustable piston stroke and dual power output ends. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies in the prior art and provide a rotary cylinder with a reasonable design, adjustable piston stroke and dual power output ends, so as to solve the problems in the prior art.

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

[0007] A rotary cylinder comprises a cylinder body, wherein an upper cylinder cover and a lower cylinder cover are respectively provided at the upper and lower ends of the cylinder body, an upper air vent and a lower air vent are respectively opened on the upper and lower cylinder covers, and the upper and lower cylinder covers are sealed and rotatably connected with a screw shaft, and the two ends of the screw shaft extend out of the upper and lower cylinder covers respectively, the interior of the cylinder body is sealed and slidably connected with a flange piston, the flange piston and the screw shaft are threadedly connected, and a number of guide columns are slidably penetrated on the flange piston, and the two ends of each guide column are detachably connected to the upper and lower cylinder covers respectively.

[0008] Preferably, a piston pad is detachably connected to the lower surface of the flange piston, and the piston pad is slidably connected to the cylinder body and the guide column respectively.

[0009] Preferably, a fourth sealing ring is provided on the upper portion of each guide column and is sealedly connected to the flange piston or the piston pad.

[0010] Preferably, a fifth sealing ring is provided at the lower portion of the piston pad and is sealedly connected to the lower portion of the screw shaft.

[0011] Preferably, a pad is sleeved on the lower end of the screw shaft, and the pad is supported on the upper surface of the lower cylinder cover.

[0012] Preferably, both ends of the screw shaft are rotatably connected to the upper cylinder cover and the lower cylinder cover via plane bearings respectively.

[0013] Preferably, both ends of the screw shaft are sealedly connected to the upper cylinder cover and the lower cylinder cover via a first sealing ring.

[0014] Preferably, both ends of the screw shaft are rotatably sleeved with copper sleeves, and the copper sleeves are arranged on the side of the first sealing ring away from the plane bearing.

[0015] Preferably, the upper and lower ends of the cylinder body are sealed with the upper cylinder cover and the lower cylinder cover respectively through a second sealing ring; the peripheral outer wall of the flange piston is sealed with the inner wall of the cylinder body through a third sealing ring.

[0016] Preferably, the upper surface of the upper cylinder cover is detachably connected to a fixing ring with an opening, and the openings at both ends of the fixing ring are connected by connecting screws.

[0017] The utility model adopts the above technical solution and has the following technical effects:

[0018] The utility model can reduce the thickness and volume of the cylinder body by respectively providing the upper vent hole and the lower vent hole in the upper cylinder head and the lower cylinder head, so as to be installed in a smaller space. At the same time, it can ensure that the vent hole has a certain depth, which is conducive to improving the air tightness of the connection. The plurality of guide columns can not only tighten the upper cylinder head and the lower cylinder head to each other so as to connect them into one body and clamp the cylinder body between the upper cylinder head and the lower cylinder head, but also guide and limit the axial movement of the flange piston to prevent the flange piston from rotating in the circumferential direction. The flange piston and the screw shaft are threadedly connected, so that when the upper vent hole is inlet and the lower vent hole is deflated, the flange piston can move downward along the axis under the action of air pressure, thereby driving the screw shaft threadedly connected thereto to rotate in the circumferential direction in the forward direction. Similarly, when the lower vent hole is inlet and the upper vent hole is deflated, the flange piston can move upward along the axis to drive the screw shaft to rotate in the reverse direction. By respectively extending the two ends of the screw shaft out of the upper cylinder head and the lower cylinder head, it can have dual power output ends. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art description. The following description is given with respect to the drawings:

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the rotary cylinder of the utility model from one perspective;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the rotary cylinder of the utility model from another perspective;

[0022] Figure 3 This is a schematic diagram of the axial cross-sectional structure of the rotary cylinder of the utility model;

[0023] Figure 4 This is a schematic diagram of the three-dimensional exploded structure of the rotary cylinder of the utility model.

[0024] In the picture:

[0025] 1. Hexagon socket screw; 2. Retaining ring; 3. Connecting screw; 4. Copper sleeve; 5. First sealing ring; 6. Upper cylinder cover; 7. Second sealing ring; 8. Plane bearing; 9. Cylinder body; 10. Screw shaft; 11. Flange piston; 12. Third sealing ring; 13. Guide column; 14. Fourth sealing ring; 15. Piston pad; 16. Spacer; 17. Lower cylinder cover; 18. Upper vent hole; 19. Lower vent hole; 20. Fifth sealing ring. DETAILED DESCRIPTION

[0026] The embodiments described below are only a part of the embodiments of the present invention and do not represent all embodiments consistent with the present invention. The exemplary embodiments are described as follows in conjunction with the accompanying drawings:

[0027] See Figure 1-4 As shown in one of the figures, the rotary cylinder of the present invention includes a cylinder body 9, and an upper cylinder head 6 and a lower cylinder head 17 are respectively provided at the upper and lower ends of the cylinder body 9. An upper air vent 18 and a lower air vent 19 connected to the interior of the cylinder body 9 are respectively provided on the upper cylinder head 6 and the lower cylinder head 17. A screw shaft 10 is sealed and rotatably connected between the upper cylinder head 6 and the lower cylinder head 17. The two ends of the screw shaft 10 extend from the upper cylinder head 6 and the lower cylinder head 17 respectively. The interior of the cylinder body 9 is sealed and slidably connected to a flange piston 11, which is threadedly connected to the screw shaft 10. A plurality of guide columns 13 are slidably penetrated on the flange piston 11, and the two ends of each guide column 13 are detachably connected to the upper cylinder head 6 and the lower cylinder head 17 respectively.

[0028] In this embodiment, by respectively providing the upper vent hole 18 and the lower vent hole 19 in the upper cylinder head 6 and the lower cylinder head 17, the thickness and volume of the cylinder body 9 can be reduced compared with the prior art so that it can be installed in a smaller space. At the same time, it can ensure that the vent hole has a certain depth, which is conducive to improving the air tightness of the connection. By providing a plurality of guide columns 13, not only can the upper cylinder head 6 and the lower cylinder head 17 be tightened to each other so as to be connected as a whole and the cylinder body 9 is clamped between the upper cylinder head 6 and the lower cylinder head 17, but also the axial movement of the flange piston 11 can be guided and limited to prevent the flange piston 11 from circumferential rotation. The flange piston 11 and the screw shaft 10 are threadedly connected so that when the upper air vent 18 is intaked and the lower air vent 19 is deflated, the flange piston 11 can move downward along the axis under the action of air pressure, thereby driving the screw shaft 10 threadedly connected thereto to rotate forward in the circumferential direction. Similarly, when the lower air vent 19 is intaked and the upper air vent 18 is deflated, the flange piston 11 can move upward along the axis to drive the screw shaft 10 to rotate in the opposite direction, thereby realizing the switching of the rotation direction of the power output end; by extending the two ends of the screw shaft 10 out of the upper cylinder head 6 and the lower cylinder head 17 respectively, it can have dual power output ends.

[0029] On the basis of the above structure, preferably, the upper end of each guide column 13 is provided with an external thread threadedly connected to the internal threaded hole provided on the lower surface of the upper cylinder cover 6, and the lower end of each guide column 13 is provided with an internal threaded hole threadedly connected to the lower cylinder cover 17 through the hexagon socket screw 1.

[0030] As a preferred embodiment, based on the above structure, the upper surface of the upper cylinder cover 6 is further detachably connected to a fixing ring 2 with an opening via a hexagon socket screw 1 for fixing the valve, and the openings at both ends of the fixing ring 2 are connected by connecting screws 3.

[0031] As a preferred embodiment, based on the above structure, preferably, the lower surface of the flange piston 11 is detachably connected to a piston pad 15 via a hexagon socket screw 1, and the piston pad 15 is slidingly connected to the cylinder body 9 and the guide column 13 respectively.

[0032] In this embodiment, the piston pad 15 can not only play a buffering and protective role during the downward movement of the flange piston 11 and extend the service life of the piston pad 15 , but also can adjust the movement stroke of the flange piston 11 .

[0033] As a preferred embodiment, based on the above structure, preferably, a fourth sealing ring 14 is provided on the upper portion of each guide column 13 to be sealed and connected to the flange piston 11 or the piston pad 15 .

[0034] As a preferred embodiment, based on the above structure, preferably, a fifth sealing ring 20 is provided at the lower portion of the piston pad 15 and is sealed and connected to the lower portion of the screw shaft 10 .

[0035] As a preferred embodiment, based on the above structure, preferably, a cushion block 16 is sleeved on the lower end of the screw shaft 10 , and the cushion block 16 is supported on the upper surface of the lower cylinder cover 17 .

[0036] In this embodiment, by setting the gasket 16, the thickness of the gasket 16 can be used to adjust the moving stroke of the flange piston 11 according to actual usage requirements, so that the purpose of adjusting the piston stroke can be achieved more conveniently by replacing the gasket 16 of different thicknesses.

[0037] As a preferred embodiment, based on the above structure, preferably, both ends of the screw shaft 10 are rotatably connected to the upper cylinder cover 6 and the lower cylinder cover 17 through plane bearings 8 respectively.

[0038] In this embodiment, plane bearings 8 are used for rotational connection between the upper end of the screw shaft 10 and the upper cylinder cover 6, and between the lower end of the screw shaft 10 and the lower cylinder cover 17, which can reduce the resistance of the screw shaft 10 during rotation, reduce friction, and improve rotation stability.

[0039] As a preferred embodiment, based on the above structure, preferably, both ends of the screw shaft 10 are sealedly connected to the upper cylinder cover 6 and the lower cylinder cover 17 through the first sealing ring 5 respectively.

[0040] As a preferred embodiment, based on the above structure, preferably, both ends of the screw shaft 10 are rotatably sleeved with copper sleeves 4, and the copper sleeves 4 are arranged on the side of the first sealing ring 5 away from the plane bearing 8.

[0041] On the basis of the above structure, preferably, the cross-sections of both ends of the screw shaft 10 extending out of the upper cylinder cover 6 and the lower cylinder cover 17 are square, so as to better connect to external valves and other equipment as power output ends.

[0042] As a preferred embodiment, based on the above structure, preferably, the upper and lower ends of the cylinder body 9 are sealedly connected to the upper cylinder cover 6 and the lower cylinder cover 17 respectively through the second sealing ring 7.

[0043] As a preferred embodiment, based on the above structure, preferably, the peripheral outer wall of the flange piston 11 is sealed and connected to the inner wall of the cylinder body 9 through the third sealing ring 12 .

[0044] The principle of this utility model is as follows:

[0045] During assembly, first seal the upper cylinder cover 6 on the upper end of the cylinder body 9 through the second sealing ring 7, then vertically penetrate the upper end of the screw shaft 10 through the opening at the lower end of the cylinder body 9 in the center of the upper cylinder cover 6 and rotate it through the copper sleeve 4, the first sealing ring 5 and the plane bearing 8, and respectively connect the upper ends of several guide columns 13 to the internal threaded holes on the lower surface of the upper cylinder cover 6 through external threads, then respectively sleeve the third sealing ring 12 and the fifth sealing ring 20 on the outer side of the flange piston 11 and the inner side of the lower end of the piston pad 15, and connect the flange piston 11 and the piston pad 15 into one body with several inner hexagonal screws 1 and then insert them from the opening at the lower end of the cylinder body 9, so that the flange piston 11 and the piston pad 15 are respectively slidably sleeved on Several guide columns 13 and the lower outer side of the screw shaft 10, and the flange piston 11 is threadedly connected to the upper thread of the screw shaft 10 by rotating the screw shaft 10, and then the gasket 16 is sleeved on the lower end of the screw shaft 10, and then the lower end of the screw shaft 10 is vertically passed through the center of the lower cylinder cover 17 and rotatably installed through the copper sleeve 4, the first sealing ring 5 and the plane bearing 8. At the same time, the lower ends of several guide columns 13 are respectively inserted into the corresponding mounting holes opened in the lower cylinder cover 17, and the lower cylinder cover 17 is sealed at the lower end of the cylinder body 9 through the second sealing ring 7. Finally, several hexagon socket screws 1 are respectively threadedly connected to the lower ends of several guide columns 13 for locking and fixing, thereby completing the assembly of the rotary cylinder.

[0046] During operation, by controlling the air intake of the upper air vent 18 and the air discharge of the lower air vent 19, the flange piston 11 can be moved downward along the axis under the action of air pressure, so that under the guiding and limiting action of the guide column 13, the screw shaft 10 threadedly connected thereto can be driven to rotate forward in the circumferential direction; similarly, by controlling the air intake of the lower air vent 19 and the air discharge of the upper air vent 18, the flange piston 11 can be moved upward along the axis to drive the screw shaft 10 to rotate in the opposite direction, thereby realizing the switching of the rotation direction of the power output end.

[0047] The above are only preferred specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any equivalent changes, modifications, substitutions and variations made by technicians in this technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of existing technologies should be within the scope of protection determined by the claims.

Claims

1. A rotary cylinder comprising a cylinder body (9), wherein the upper and lower ends of the cylinder body (9) are respectively provided with an upper cylinder cover (6) and a lower cylinder cover (17), characterized in that: The upper cylinder cover (6) and the lower cylinder cover (17) are respectively provided with an upper vent hole (18) and a lower vent hole (19) connected to the interior of the cylinder body (9). A screw shaft (10) is sealed and rotatably connected between the upper cylinder cover (6) and the lower cylinder cover (17). The two ends of the screw shaft (10) extend out of the upper cylinder cover (6) and the lower cylinder cover (17). The interior of the cylinder body (9) is sealed and slidably connected to a flange piston (11). The flange piston (11) and the screw shaft (10) are threadedly connected. A plurality of guide columns (13) are slidably penetrated on the flange piston (11). The two ends of each guide column (13) are detachably connected to the upper cylinder cover (6) and the lower cylinder cover (17).

2. The rotary cylinder according to claim 1, characterized in that: The lower surface of the flange piston (11) is detachably connected to a piston pad (15), and the piston pad (15) is slidably connected to the cylinder body (9) and the guide column (13) respectively.

3. The rotary cylinder according to claim 2, characterized in that: A fourth sealing ring (14) is provided on the upper portion of each guide column (13) and is sealedly connected to the flange piston (11) or the piston pad (15).

4. The rotary cylinder according to claim 2, characterized in that: A fifth sealing ring (20) is provided at the lower portion of the piston pad (15) and is sealedly connected to the lower portion of the screw shaft (10).

5. The rotary cylinder according to claim 1, characterized in that: The lower end of the screw shaft (10) is sleeved with a cushion block (16), and the cushion block (16) is supported on the upper surface of the lower cylinder cover (17).

6. The rotary cylinder according to claim 1, characterized in that: The two ends of the screw shaft (10) are rotatably connected to the upper cylinder cover (6) and the lower cylinder cover (17) via plane bearings (8).

7. The rotary cylinder according to claim 6, characterized in that: The two ends of the screw shaft (10) are sealedly connected to the upper cylinder cover (6) and the lower cylinder cover (17) via first sealing rings (5).

8. The rotary cylinder according to claim 7, characterized in that: Both ends of the screw shaft (10) are rotatably sleeved with copper sleeves (4), and the copper sleeves (4) are arranged on a side of the first sealing ring (5) away from the plane bearing (8).

9. The rotary cylinder according to claim 1, characterized in that: The upper and lower ends of the cylinder body (9) are sealedly connected to the upper cylinder head (6) and the lower cylinder head (17) respectively through the second sealing ring (7); the peripheral outer wall of the flange piston (11) is sealedly connected to the inner wall of the cylinder body (9) through the third sealing ring (12).

10. The rotary cylinder according to claim 1, characterized in that: The upper surface of the upper cylinder cover (6) is detachably connected to a fixing ring (2) having an opening, and the openings at both ends of the fixing ring (2) are connected by connecting screws (3).

Images