Rotary air cylinder structure

Abstract

The invention discloses a rotary air cylinder structure, which belongs to the technical field of air cylinders and comprises an air cylinder assembly, a spiral shaft, a bearing assembly, a piston, a limiting device, a connecting device, an air inlet pipeline I and an air inlet pipeline II, the spiral shaft is fixed through a bearing assembly arranged in the air cylinder assembly, a piston is arranged in the air cylinder assembly, the spiral shaft penetrates through the piston, a first air inlet pipeline and a second air inlet pipeline are arranged on the two sides of the piston in the air cylinder correspondingly and used for controlling the piston to reciprocate in the air cylinder assembly, and the limiting device can prevent the piston from rotating in the air cylinder assembly. The piston is matched with threads on the spiral shaft through a plurality of connecting devices, so that the piston reciprocates in the air cylinder assembly to drive the spiral shaft to rotate forwards and backwards, the device has the advantages that the device structure is simple, the rotating angle is easy to control, and the precision is high, and the problem that the workpiece is inconvenient to machine due to the fact that the rotating angle of the air cylinder is not easy to control can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of cylinders, and more specifically relates to a rotating cylinder structure. Background Art

[0002] A cylinder is a cylindrical metal part that guides a piston to perform linear reciprocating motion in the cylinder. Air in the engine cylinder converts heat energy into mechanical energy by expanding; gas in the compressor cylinder is compressed by the piston to increase pressure. At present, rotary cylinders are mainly used in instrument lathes, CNC lathes, blanking lathes and other equipment. Traditional rotary cylinders are often extremely large in size and complex in structure for precise control of the rotation angle. Small rotary cylinders have poor rotation angle accuracy, which brings great inconvenience to workpiece processing. Summary of the invention

[0003] In view of this, the present invention provides a rotating cylinder structure, which has the advantages of simple device structure, easy to control the rotation angle and high precision, and can solve the problem that the cylinder rotation angle is difficult to control and causes inconvenience in workpiece processing.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] A rotating cylinder structure comprises: a cylinder assembly, a spiral shaft, a bearing assembly, a piston, a limiting device, a connecting device, an intake pipe 1 and an intake pipe 2; the spiral shaft is penetrated in the cylinder assembly, the spiral shaft is fixed by a bearing assembly arranged in the cylinder assembly, the piston is arranged in the cylinder assembly, the spiral shaft penetrates the piston, the two sides of the piston are located in the cylinder assembly and are respectively provided with the intake pipe 1 and the intake pipe 2 for controlling the reciprocating motion of the piston in the cylinder assembly, the limiting device is arranged in the cylinder assembly and is connected to the cylinder assembly and the piston, the limiting device can prevent the piston from rotating in the cylinder assembly, a plurality of the connecting devices are arranged in the piston, the piston cooperates with the thread on the spiral shaft through the plurality of the connecting devices, so that the reciprocating motion of the piston in the cylinder assembly can drive the spiral shaft to rotate forward and reverse.

[0006] Furthermore, the cylinder assembly includes a bearing front pressure plate, a cylinder front cover, a cylinder barrel, a cylinder rear cover and a bearing rear pressure plate, the bearing front pressure plate is connected to the front end of the cylinder front cover, the bearing rear pressure plate is connected to the rear end of the cylinder rear cover, the front end of the cylinder barrel is sleeved on the rear end of the cylinder front cover, and the rear end of the cylinder barrel is sleeved on the front end of the cylinder rear cover.

[0007] Furthermore, the bearing assembly includes a front bearing and a rear bearing, a front bearing groove is provided at the connection between the bearing front pressure plate and the cylinder front cover, and the front bearing is arranged in the front bearing groove, and a rear bearing groove is provided at the connection between the cylinder rear cover and the bearing rear pressure plate, and the rear bearing is arranged in the rear bearing groove.

[0008] Further, the connecting device includes a locking screw, a steel ball pressing pin and a steel ball; the surface of the piston is circumferentially provided with a plurality of connecting through holes, the steel ball is placed at the bottom of the connecting through hole and contacts the bottom of the thread of the spiral shaft, the steel ball pressing pin is inserted into the connecting through hole and contacts the steel ball, the inner wall of the connecting through hole is provided with a thread, the locking screw contacts the steel ball pressing pin, the locking screw is inserted into the connecting through hole and is threadedly connected to the connecting through hole, and the end of the locking screw contacts the steel ball pressing pin.

[0009] Furthermore, the first intake pipe is arranged in the cylinder front cover and one end is connected to the front space of the piston, and the second intake pipe is arranged in the cylinder rear cover and is connected to the rear space of the piston.

[0010] Furthermore, sleeve one and sleeve two are fixedly connected to the front and rear sides of the piston respectively; sleeve one, the cylinder front cover, the cylinder barrel and the piston constitute a closed space; sleeve two, the cylinder rear cover, the cylinder barrel and the piston constitute another closed space.

[0011] Furthermore, an O-ring one groove is provided on the cylinder front cover at the connection with the sleeve one, and an O-ring one is provided in the O-ring one groove; an O-ring two groove is provided on the cylinder front cover at the connection with the cylinder barrel, and an O-ring two is provided in the O-ring two groove; an O-ring three groove is provided on the cylinder rear cover at the connection with the sleeve two, and an O-ring three is provided in the O-ring three groove; an O-ring four groove is provided on the cylinder rear cover at the connection with the cylinder barrel, and an O-ring four is provided in the O-ring four groove; a plurality of O-ring five grooves are provided on the piston at the contact position with the cylinder barrel, and an O-ring five is provided in each of the O-ring five grooves.

[0012] Furthermore, the limiting device includes a piston guide rod, and a plurality of corresponding piston guide rod grooves are provided on the cylinder front cover and the cylinder rear cover, one end of the piston guide rod is inserted into the piston guide rod groove of the cylinder front cover, and the other end passes through the piston and is inserted into the piston guide rod groove of the cylinder rear cover.

[0013] Furthermore, six O-ring grooves are provided in the through hole of the piston guide rod passing through the piston, and six O-rings are provided in the six O-ring grooves.

[0014] Beneficial effects of the present invention:

[0015] The piston is arranged in the cylinder assembly and the piston cooperates with the thread on the screw shaft, so that the rotation angle of the device can be accurately controlled by setting the reciprocating stroke size of the piston and the thread lead of the screw shaft. The combined arrangement of the cylinder assembly makes the device easy to assemble and is also convenient for the subsequent maintenance, repair and replacement of the device. The arrangement of the bearing assembly provides a guarantee for the smooth rotation of the screw shaft. In addition, the arrangement of the front pressure plate of the bearing and the rear pressure plate of the bearing further prevents the axial movement of the screw shaft during use; the piston and the screw shaft are connected by a steel ball rolling connection, which greatly reduces the wear of the device and extends the service life of the device; the arrangement of the closed space on the front and rear sides of the piston effectively reduces the gas loss required for the operation of the device; the arrangement of O-ring one, O-ring two, O-ring three, O-ring four, O-ring five and O-ring six further enhances the air tightness of the device and effectively ensures the environment for power output. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0017] Figure 1 It is the overall structure diagram of the present invention.

[0018] Figure 2 It is an AA cross-sectional view of the present invention.

[0019] Figure 3 It is a BB cross-sectional view of the present invention.

[0020] Among them, in the figure:

[0021] 1-screw shaft; 2-piston; 3-intake pipe one; 4-intake pipe two; 5-bearing front pressure plate; 6-cylinder front cover; 7-cylinder barrel; 8-cylinder rear cover; 9-bearing rear pressure plate; 10-front bearing; 11-rear bearing; 12-fastening screw; 13-steel ball pressure pin; 14-steel ball; 15-sleeve one; 16-sleeve two; 17-O-ring one: 18-O-ring two; 19-O-ring three; 20-O-ring four; 21-O-ring five; 22-piston guide rod; 23-O-ring six. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Please see attached Figure 1-3 The present invention provides a rotary cylinder structure, comprising: a cylinder assembly, a screw shaft 1, a bearing assembly, a piston 2, a limit device, a connecting device, an air intake pipe 1 3 and an air intake pipe 2 4;

[0024] The cylinder assembly is provided with the spiral shaft 1, which is fixed by a bearing assembly provided in the cylinder assembly. The cylinder assembly is provided with the piston 2, which is provided with the spiral shaft 1 passing through the piston 2. The two sides of the piston 2 are provided with the intake pipe 1 3 and the intake pipe 2 4 respectively in the cylinder assembly, which are used to control the reciprocating motion of the piston 2 in the cylinder assembly. The limit device is provided in the cylinder assembly and connected with the cylinder assembly and the piston 2. The limit device can prevent the piston 2 from rotating in the cylinder assembly. The piston 2 is provided with a plurality of the connecting devices, and the piston cooperates with the threads on the spiral shaft 1 through the plurality of the connecting devices, so that the reciprocating motion of the piston 1 in the cylinder assembly can drive the spiral shaft 1 to rotate forward and reversely. The piston 2 is provided in the cylinder assembly and the piston 2 cooperates with the threads on the spiral shaft 1. The rotation angle of the device can be precisely controlled by setting the reciprocating stroke size of the piston 2 and the thread lead of the spiral shaft 1. The cylinder assembly includes a bearing front pressure plate 5, a cylinder front cover 6, a cylinder barrel 7, a cylinder rear cover 8 and a bearing rear pressure plate 9. The bearing front pressure plate 5 is connected to the front end of the cylinder front cover 6, the bearing rear pressure plate 9 is connected to the rear end of the cylinder rear cover 8, the front end of the cylinder barrel 7 is sleeved on the rear end of the cylinder front cover 6, and the rear end of the cylinder barrel 7 is sleeved on the front end of the cylinder rear cover 8. The combined arrangement of the cylinder assembly makes the device easy to assemble and is also convenient for the maintenance, repair and replacement of the device in the later stage. The bearing assembly includes a front bearing 10 and a rear bearing 11. A front bearing groove is provided at the connection between the bearing front pressure plate 5 and the cylinder front cover 6, and the front bearing 10 is arranged in the front bearing groove. A rear bearing groove is provided at the connection between the cylinder rear cover 8 and the bearing rear pressure plate 9, and the rear bearing 11 is arranged in the rear bearing groove. The setting of the bearing assembly provides a guarantee for the smooth rotation of the screw shaft 1, and the setting of the bearing front pressure plate 5 and the bearing rear pressure plate 9 further prevents the screw shaft 1 from axial movement during use. The connecting device includes a set screw 12, a steel ball pressure pin 13 and a steel ball 14; the surface of the piston 2 is circumferentially provided with a plurality of connecting through holes, the steel ball 14 is placed at the bottom of the connecting through hole and contacts the threaded bottom of the screw shaft 1, the steel ball pressure pin 13 is inserted into the connecting through hole and contacts the steel ball 14, the inner wall of the connecting through hole is provided with a thread, the set screw 12 contacts the steel ball pressure pin 13, the set screw 12 is inserted into the connecting through hole and is threadedly connected to the connecting through hole, and the end of the set screw 12 contacts the steel ball pressure pin 13.The piston 2 and the spiral shaft 1 are connected by rolling with a steel ball 14, which greatly reduces the wear of the device and prolongs the service life of the device; the intake pipe 1 3 is arranged in the cylinder front cover 6 and communicates with the front space of the piston 2 at one end, and the intake pipe 2 4 is arranged in the cylinder rear cover 8 and communicates with the rear space of the piston 2. The front and rear sides of the piston are respectively fixedly connected with a sleeve 15 and a sleeve 2 16, and the sleeve 1 15, the cylinder front cover 6, the cylinder barrel 7 and the piston 2 form a closed space, and the sleeve 2 16, the cylinder rear cover 8, the cylinder barrel 7 and the piston 2 form another closed space. The cylinder front cover 6 is provided with an O-ring groove 1 at the connection with the sleeve 15, and an O-ring 17 is provided in the O-ring groove 1; the cylinder front cover 6 is provided with an O-ring groove 2 at the connection with the cylinder barrel 7, and an O-ring 2 18 is provided in the O-ring groove 2; the cylinder rear cover 8 is provided with an O-ring groove 3 at the connection with the sleeve 2 16, and an O-ring 3 19 is provided in the O-ring groove 3; the cylinder rear cover 8 is provided with an O-ring groove 4 at the connection with the cylinder barrel 7, and an O-ring 4 20 is provided in the O-ring groove 4; the piston 2 is provided with a plurality of O-ring grooves 5 at the contact position with the cylinder barrel 7, and an O-ring 5 21 is provided in each of the O-ring grooves 5. The limiting device includes a piston guide rod 22, and the cylinder front cover 6 and the cylinder rear cover 8 are provided with a plurality of piston guide rod grooves corresponding to the positions. One end of the piston guide rod 22 is inserted into the piston guide rod groove of the cylinder front cover 6, and the other end is inserted into the piston guide rod groove of the cylinder rear cover 8 after passing through the piston 2. The setting of the closed space on the front and rear sides of the piston 2 effectively reduces the gas loss required for the operation of the device; the through hole of the piston guide rod 22 passing through the piston 2 is provided with six O-ring grooves, and the six O-ring grooves are provided with six O-rings 23. The setting of O-ring one 17, O-ring two 18, O-ring three 19, O-ring four 20, O-ring five 21 and O-ring six 23 further enhances the air tightness of the device and effectively ensures the environment for power output.

[0025] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to the above embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rotary cylinder structure, characterized in that: include: Cylinder assembly, screw shaft (1), bearing assembly, piston (2), limit device, connecting device, air intake pipe 1 (3) and air intake pipe 2 (4); The cylinder assembly is provided with the screw shaft (1) penetrating therein, and the screw shaft (1) is fixed by means of a bearing assembly provided in the cylinder assembly. The cylinder assembly is provided with the piston (2), and the screw shaft (1) penetrates the piston (2). The two sides of the piston (2) are provided with the intake pipe 1 (3) and the intake pipe 2 (4) respectively in the cylinder assembly, and are used to control the reciprocating motion of the piston (2) in the cylinder assembly. The limiting device is provided in the cylinder assembly and is connected to the cylinder assembly and the piston (2). The limiting device can prevent the piston (2) from rotating in the cylinder assembly. The piston (2) is provided with a plurality of the connecting devices. The piston cooperates with the threads on the screw shaft (1) through the plurality of the connecting devices, so that the reciprocating motion of the piston (1) in the cylinder assembly can drive the screw shaft (1) to rotate forward and reversely.

2. A rotary cylinder structure according to claim 1, characterized in that: The cylinder assembly comprises a bearing front pressure plate (5), a cylinder front cover (6), a cylinder barrel (7), a cylinder rear cover (8) and a bearing rear pressure plate (9); the bearing front pressure plate (5) is connected to the front end of the cylinder front cover (6), the bearing rear pressure plate (9) is connected to the rear end of the cylinder rear cover (8), the front end of the cylinder barrel (7) is sleeved on the rear end of the cylinder front cover (6), and the rear end of the cylinder barrel (7) is sleeved on the front end of the cylinder rear cover (8).

3. A rotary cylinder structure according to claim 2, characterized in that: The bearing assembly comprises a front bearing (10) and a rear bearing (11); a front bearing groove is provided at the connection between the bearing front pressure plate (5) and the cylinder front cover (6); the front bearing (10) is arranged in the front bearing groove; a rear bearing groove is provided at the connection between the cylinder rear cover (8) and the bearing rear pressure plate (9); the rear bearing (11) is arranged in the rear bearing groove.

4. A rotary cylinder structure according to claim 1, characterized in that: The connecting device comprises a set screw (12), a steel ball pressing pin (13) and a steel ball (14); a plurality of connecting through holes are circumferentially arranged on the surface of the piston (2); the steel ball (14) is placed at the bottom of the connecting through hole and contacts the bottom of the thread of the screw shaft (1); the steel ball pressing pin (13) is inserted into the connecting through hole and contacts the steel ball (14); the inner wall of the connecting through hole is provided with a thread; the set screw (12) is inserted into the connecting through hole and is threadedly connected to the connecting through hole; and the end of the set screw (12) contacts the steel ball pressing pin (13).

5. A rotary cylinder structure according to claim 2, characterized in that: The first intake pipe (3) is arranged in the cylinder front cover (6) and one end is connected to the front space of the piston (2), and the second intake pipe (4) is arranged in the cylinder rear cover (8) and is connected to the rear space of the piston (2).

6. A rotary cylinder structure according to claim 2, characterized in that: The front and rear sides of the piston are respectively fixedly connected with sleeve one (15) and sleeve two (16); the sleeve one (15), the cylinder front cover (6), the cylinder barrel (7) and the piston (2) form a closed space; the sleeve two (16), the cylinder rear cover (8), the cylinder barrel (7) and the piston (2) form another closed space.

7. A rotary cylinder structure according to claim 6, characterized in that: The cylinder front cover (6) is provided with an O-ring groove at the connection with the sleeve one (15), and an O-ring one (17) is arranged in the O-ring groove one; the cylinder front cover (6) is provided with an O-ring groove two at the connection with the cylinder barrel (7), and an O-ring two (18) is arranged in the O-ring groove two; the cylinder rear cover (8) is provided with an O-ring groove three at the connection with the sleeve two (16), and an O-ring three (19) is arranged in the O-ring groove three; the cylinder rear cover (8) is provided with an O-ring groove four at the connection with the cylinder barrel (7), and an O-ring four (20) is arranged in the O-ring groove four; the piston (2) is provided with a plurality of O-ring grooves five at the contact with the cylinder barrel (7), and an O-ring five (21) is arranged in each of the O-ring grooves five.

8. A rotary cylinder structure according to claim 2, characterized in that: The limiting device comprises a piston guide rod (22), and a plurality of piston guide rod grooves corresponding to the positions are arranged on the cylinder front cover (6) and the cylinder rear cover (8), one end of the piston guide rod (22) is inserted into the piston guide rod groove of the cylinder front cover (6), and the other end passes through the piston (2) and is inserted into the piston guide rod groove of the cylinder rear cover (8).

9. A rotary cylinder structure according to claim 8, characterized in that: The through hole of the piston guide rod (22) penetrating the piston (2) is provided with six grooves for O-rings, and six O-rings (23) are provided in the six grooves for O-rings.

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