90-degree corner type air cylinder

Abstract

A 90-degree corner type air cylinder comprises a cylinder body and a piston assembly, a barrel-shaped inner cavity is formed in the cylinder body, a first axial through hole allowing the upper portion of the piston assembly to penetrate through is formed in the center of the top of the barrel-shaped inner cavity, the piston assembly is provided with a rotating shaft, a piston connecting rod and a pneumatic piston, and a track groove which spirals by 90 degrees and reaches the top is formed in the peripheral wall face of the upper portion of the rotating shaft. A radial blind hole is formed in the bottom face of the piston connecting rod and matched with the upper portion of the rotating shaft, a first radial through hole is formed in the lower portion of the radial blind hole, and the first radial through hole is used for installing a ball matched with the track groove. And the inner wall surface of the second axial through hole is tightly matched with the outer wall surface of the lower part of the piston connecting rod to limit the ball. According to the utility model, the processing difficulty is low, the piston connecting rod and the pneumatic piston can be made of metal made of different materials according to the use requirements of different parts, the structural design is more reasonable, the service life is also stable, and the purpose of 90-degree rotation is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of angle cylinders, in particular to a 90-degree angle cylinder. Background Art

[0002] Common angle cylinders include gear rack type, connecting rod type and ball type. Gear rack type angle cylinder and connecting rod type angle cylinder are widely used due to their stability. However, due to their complex structure, high manufacturing difficulty and high cost, ball type angle cylinder is also commonly used in many occasions. At present, the common ball type angle cylinder mainly includes a cylinder body, a piston rod and a rotating shaft. A pressure block is arranged at the right end of the piston rod. The pressure block has a cylindrical part, which is adapted to the rotating shaft and sleeved on the rotating shaft. A through hole corresponding to the spiral groove is arranged on the side wall of the cylindrical part of the pressure block, and a part of the balls placed in the spiral groove are arranged in the through hole. A sleeve is also arranged on the outer side of the cylindrical part of the pressure block. The position of the ball is limited by the sleeve to ensure the stable operation of the piston rod. Although this method does not need to adjust the position of the ball by adjusting the screw, the matching accuracy between the sleeve and the right part of the piston rod and the sleeve and the rotating shaft is high, so to a certain extent, the processing difficulty is increased, the installation is also troublesome, and the structural design is unreasonable. Utility Model Content

[0003] In view of the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide a 90° angle cylinder with reasonable structure, convenient processing, stable operation and stable service life.

[0004] The utility model solves the technical problem by adopting a technical solution of a 90° rotating cylinder, comprising a cylinder body and a rear cylinder cover connected to a piston assembly, the cylinder body is provided with a cylindrical inner cavity with a bottom completely penetrated to form an installation port, the rear cylinder cover is installed in the installation port, the top center of the cylindrical inner cavity is also provided with a first axial through hole for the upper part of the piston assembly to pass through, the top of the piston assembly is fixedly connected with a pressing assembly, the piston assembly is provided with a rotating shaft, a piston connecting rod, and a pneumatic piston in sequence from the inside to the outside, the rotating shaft The lower part is fixed to the rear cylinder cover through a pin shaft, and a track groove with a spiral of 90° to the top is provided on the upper outer peripheral wall surface of the rotating shaft, and a radial blind hole is provided on the bottom surface of the piston connecting rod, and the radial blind hole matches the upper part of the rotating shaft and a first radial through hole is provided at the lower part thereof, and the first radial through hole is used to install a ball that fits the track groove, and a second axial through hole is provided at the center of the pneumatic piston, and the inner wall surface of the second axial through hole is tightly matched with the lower outer wall surface of the piston connecting rod to form a limit for the ball.

[0005] Compared with the prior art, which uses the cooperation of a pressure block and a sleeve to achieve the rotational cooperation between the piston rod and the rotating shaft, this solution adopts the method of combining and assembling the piston connecting rod and the pneumatic piston, and forms the first radial through hole for installing the ball at the corresponding position of the radial blind hole of the piston connecting rod. Therefore, it is only necessary to meet the cooperation accuracy requirement between the second axial through hole of the pneumatic piston and the piston connecting rod. While the operation is stable, the processing difficulty is also low. It can also realize that the piston connecting rod and the pneumatic piston use metals of different materials according to the use requirements of different parts. The structural design is more reasonable, the service life is stable, the corresponding installation parts are reduced, and the installation is more convenient. The track groove is spiral 90° and reaches the top, thereby achieving the purpose of driving the pressure-resisting assembly to rotate 90°.

[0006] Furthermore, an upper section of the inner wall surface of the second axial through hole is set as a first small diameter surface, and a diameter of the first small diameter surface is smaller than a diameter of a lower outer wall surface of the piston connecting rod.

[0007] In the above scheme, the first small diameter surface and the lower outer wall surface of the piston connecting rod can be matched to achieve the plug-in match between the piston connecting rod and the pneumatic piston, the installation stability is also high, the smoothness of the ball rolling is guaranteed, and the installation and matching of the two are also convenient.

[0008] Furthermore, the bottom section of the lower outer wall surface of the piston connecting rod is provided with a second small diameter surface, the diameter of the second small diameter surface is consistent with the diameter of the bottom section of the inner wall surface of the second axial through hole, and the first radial through hole is formed on the second small diameter surface.

[0009] In the above scheme, the bottom section of the lower outer wall surface of the piston connecting rod is set as the second small diameter surface, so the pneumatic piston and the piston connecting rod are matched in a loose-first-then-tightened manner. This loose-first-then-tightened insertion method can facilitate the initial installation of the pneumatic piston and prevent misinsertion, and can also clamp the piston connecting rod in the final stage to improve stability.

[0010] Furthermore, an annular sealing groove is formed at a position of the piston connecting rod relative to the first small diameter surface, and the annular sealing groove is used for installing a sealing ring.

[0011] In the above scheme, an annular sealing groove is provided at the corresponding position of the piston connecting rod, and a sealing ring is installed in the annular sealing groove to improve the sealing effect between the piston connecting rod and the second axial through hole, so that the energy transmission efficiency is high.

[0012] Furthermore, a first air pipe hole formed radially is provided on the peripheral wall surface of the cylinder body relative to the first axial through hole, the first air hole of the cylinder is axially arranged and connects the first air pipe hole and the upper end of the cylindrical inner cavity, and the top end of the pneumatic piston is provided with a first convex portion surrounding the second axial through hole.

[0013] In the above scheme, the air intake or exhaust of the first air hole set at the top quickly forms a pressure difference in the chambers at both ends of the pneumatic piston, and the formation positions of the first air pipe hole and the first air hole are reasonable, which can achieve the purpose of lowering the overall height of the cylinder body. The setting of the first convex part enables the gas to better act on the pneumatic piston, and the pneumatic piston can better drive the piston connecting rod to move, and the structural design is reasonable.

[0014] Furthermore, a second air pipe hole formed radially is provided on the peripheral wall surface of the cylinder body, the second air hole of the cylinder is radially arranged and connects the second air pipe hole and the lower end of the cylindrical inner cavity, and the bottom end of the pneumatic piston is provided with a second convex portion surrounding the second axial through hole, and the top end of the rear cylinder cover is provided with a third convex portion surrounding the third axial through hole.

[0015] In the above scheme, by providing a second air pipe hole with a second air hole, and connecting the second air hole to the lower end of the cylindrical inner cavity, the air intake or exhaust of the second air hole can quickly form a pressure difference in the chambers at both ends of the pneumatic piston, and the provision of the second convex portion and the third convex portion enables the gas to better act on the pneumatic piston, and the pneumatic piston can better drive the piston to move, and the structural design is reasonable.

[0016] Furthermore, two symmetrical track grooves are provided on the rotating shaft, the ball bearings and the first radial through holes are arranged corresponding to the track grooves, and vertical sections along the axial direction are provided at both upper and lower ends of the track grooves.

[0017] In the above scheme, the track groove, the ball and the first radial through hole will form two sets of cooperation, so the cooperation between the piston connecting rod and the rotating shaft will be more stable, and vertical sections are set at the upper and lower ends of the track groove. Therefore, during the working process of tightening or loosening the pressing component, the piston connecting rod first moves linearly and then rotates. This setting ensures the service life of the pneumatic piston and the piston connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the overall structure of the utility model;

[0019] Figure 2 It is a partial structural decomposition schematic diagram of the utility model;

[0020] Figure 3 This is a schematic diagram of the rotating shaft structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the piston connecting rod structure of the utility model;

[0022] Figure 5 This is a cross-sectional view of the pneumatic piston structure of the utility model;

[0023] Figure 6 This is a cross-sectional view of the rear cylinder cover structure of the utility model;

[0024] Figure 7 This is a partial structural section of the utility model Figure 1 ;

[0025] Figure 8 This is a partial structural section of the utility model Figure 2 .

[0026] In the figure: 1-cylinder body, 2-rear cylinder head, 3-cylindrical cavity, 4-first axial through hole, 5-pressing assembly, 6-rotating shaft, 7-piston connecting rod, 8-pneumatic piston, 9-pin shaft, 10-track groove, 11-radial blind hole, 12-first radial through hole, 13-ball, 14-second axial through hole, 15-first small diameter surface, 16-second small diameter surface, 17-annular sealing groove, 18-first air pipe hole, 19-first air hole, 20-first convex portion, 21-second air pipe hole, 22-second air hole, 23-second convex portion, 24-third axial through hole, 25-third convex portion, 26-vertical section, 27-third radial through hole, 28-fourth radial through hole. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the embodiments of the utility model and / or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work. In addition, the orientation only represents the relative position relationship between the components, not the absolute position relationship.

[0028] See also Figures 1 to 8As shown, a 90° rotating cylinder comprises a cylinder body 1 and a rear cylinder cover 2 connected with a piston assembly. The cylinder body 1 is provided with a cylindrical inner cavity 3 with a bottom completely penetrated to form an installation port. The rear cylinder cover 2 is installed in the installation port. A first axial through hole 4 for the upper part of the piston assembly to pass through is also provided at the top center of the cylindrical inner cavity 3. A pressing assembly 5 is fixedly connected to the top of the piston assembly. The piston assembly is provided with a rotating shaft 6, a piston connecting rod 7, and a pneumatic piston 8 in sequence from the inside to the outside. The lower part of the rotating shaft 6 is fixed to the rear cylinder cover 2 through a pin 9. A track groove 10 is provided on the upper outer peripheral wall of the rotating shaft 6, which spirals 90° and reaches the top, thereby achieving the purpose of driving the pressing assembly to rotate 90°. The piston connecting rod 7 is provided with a pneumatic piston 8, and the piston connecting rod 7 is provided with a pneumatic piston 8. A radial blind hole 11 is provided on the bottom surface of the rod 7, and the radial blind hole 11 cooperates with the upper part of the rotating shaft 6, that is, the track groove 10 is located in the radial blind hole 11, and a first radial through hole 12 is also provided at the corresponding position of the lower part of the radial blind hole 11. The first radial through hole 12 is used to install a ball 13 that is adapted to the track groove 10, that is, a part of the ball 13 will be located in the track groove 10. A second axial through hole 14 is provided in the center of the pneumatic piston 8. The inner wall surface of the second axial through hole 14 is tightly matched with the lower outer wall surface of the piston connecting rod 7 to form a limit for the ball 13. More specifically, the inner wall surface of the second axial through hole 14 will cause the ball 13 to move along the track of the track groove 10.

[0029] This solution adopts a combined assembly method of the piston connecting rod 7 and the pneumatic piston 8, and forms a first radial through hole 12 for mounting the ball 13 at a corresponding position of the radial blind hole 11 of the piston connecting rod 7. This method utilizes the inner wall size of the second axial through hole 14 to control the fit between the ball 13 and the rotating shaft 6, so that the piston connecting rod 7, the ball 13, and the rotating shaft 6 can achieve the best fit in a simple and effective way. Therefore, it is only necessary to meet the fit accuracy requirement between the second axial through hole 14 of the pneumatic piston 8 and the piston connecting rod 7. Compared with the method of using the fit of a pressure block and a sleeve to achieve the rotational fit between the piston rod and the rotating shaft, it is easier to improve the processing accuracy, work stably, and have low processing difficulty. It can also realize that the piston connecting rod 7 and the pneumatic piston 8 use metals of different materials according to the use requirements of different parts. The structural design is more reasonable, the service life is stable, the corresponding installation parts are reduced, and the installation is more convenient.

[0030] In this embodiment, the upper section of the inner wall surface of the second axial through hole 14 is set as a first small diameter surface 15, and the diameter of the first small diameter surface 15 is smaller than the diameter of the lower outer wall surface of the piston connecting rod 7. That is to say, through the cooperation of the first small diameter surface 15 and the lower outer wall surface of the piston connecting rod 7, the piston connecting rod 7 and the pneumatic piston 8 can be plugged and fixedly matched, the installation stability is also high, the smoothness of the rolling of the ball 13 is guaranteed, and the installation and cooperation of the two are also convenient.

[0031] In this embodiment, the bottom section of the lower outer wall surface of the piston connecting rod 7 is provided with a second small diameter surface 16, and the diameter of the second small diameter surface 16 is consistent with the diameter of the bottom section of the inner wall surface of the second axial through hole 14. The first radial through hole 12 is formed on the second small diameter surface 16. The bottom section of the lower outer wall surface of the piston connecting rod 7 is set as the second small diameter surface 16. Therefore, the pneumatic piston 8 and the piston connecting rod 7 are matched in a loose-then-tight manner. This loose-then-tight insertion method can facilitate the initial installation of the pneumatic piston 8 and prevent misinsertion, and can clamp the piston connecting rod 7 in the final stage to improve stability.

[0032] In this embodiment, an annular sealing groove 17 is formed at the position of the piston connecting rod 7 relative to the first small diameter surface 15, and the annular sealing groove 17 is used to install a sealing ring. By setting the annular sealing groove 17 at the corresponding position of the piston connecting rod 7 and installing the sealing ring in the annular sealing groove 17, the sealing effect between the piston connecting rod 7 and the second axial through hole 14 is improved, so that the energy transfer efficiency is high.

[0033] In this embodiment, a first air pipe hole 18 formed radially is provided on the peripheral wall surface of the cylinder body 1 relative to the first axial through hole 4, and the first air hole 19 of the cylinder is axially arranged and connects the first air pipe hole 18 and the upper end of the cylindrical inner cavity 3, and the top end of the pneumatic piston 8 is provided with a first convex portion 20 surrounding the second axial through hole 14. The air intake or exhaust of the first air hole 19 arranged on the top quickly forms a pressure difference in the chambers at both ends of the pneumatic piston 8, and the formation positions of the first air pipe hole 18 and the first air hole 19 are reasonable, which can achieve the purpose of reducing the overall height of the cylinder body 1. The setting of the first convex portion 20 makes the upper end area of ​​the pneumatic piston 8 larger, so that the gas can better act on the pneumatic piston 8, therefore, the pneumatic piston 8 can better drive the piston connecting rod 7 to move back and forth, and the structural design is reasonable.

[0034] In the present embodiment, a second air pipe hole 21 formed radially is provided on the peripheral wall surface of the cylinder body 1, the second air hole 22 of the cylinder is radially arranged and connected with the second air pipe hole 21 and the lower end of the cylindrical inner cavity 3, and the bottom end of the pneumatic piston 8 is provided with a second convex portion 23 surrounding the second axial through hole 14, and the top end of the rear cylinder head 2 is provided with a third convex portion 25 surrounding the third axial through hole 24. More specifically, by providing the second air pipe hole 21 with the second air hole 22 and making the second air hole 22 connected with the lower end of the cylindrical inner cavity 3, the intake or exhaust of the second air hole 22 can quickly form a pressure difference in the chambers at both ends of the pneumatic piston 8, and after rotating downward into position, the pneumatic piston 8 forms a contact limit with the rear cylinder head 2, and forms a gap around the second convex portion 23 and the third convex portion 25. At this time, the intake of the second air hole 22 can better act on the pneumatic piston 8, and the pneumatic piston 8 can better drive the piston connecting rod to move, and the structural design is reasonable.

[0035] In this example, two symmetrical track grooves 10 are provided on the rotating shaft 6, and the ball 13 and the first radial through hole 12 are arranged corresponding to the track grooves 10, and the upper and lower ends of the track groove 10 are provided with vertical sections 26 along the axial direction. More specifically, the track groove 10, the ball 13 and the first radial through hole 12 will form two sets of cooperation, so the cooperation between the piston connecting rod 7 and the rotating shaft 6 will be more stable, and the vertical sections 26 are arranged at the upper and lower ends of the track groove 10, so during the working process of tightening or loosening the pressing assembly, the piston connecting rod 7 first moves linearly and then rotates. This arrangement ensures the service life of the pneumatic piston 8 and the piston connecting rod 6 compared to the method of synchronous rotation tightening or loosening.

[0036] In this embodiment, the rear end cover 2 includes a limiting ring and a plug-in ring. The limiting ring is adapted to the annular fixed cavity formed around the cylindrical inner cavity 3 at the bottom of the cylinder body 1. The plug-in ring is adapted to the cylindrical inner cavity 3. A third radial through hole 27 is also provided on the limiting ring, and a corresponding fourth radial through hole 28 is provided on the rotating shaft 6. The pin 9 passes through the third radial through hole 27 and the fourth radial through hole 28 in sequence to fix the rotating shaft 6 on the rear end cover 2.

[0037] During installation, the piston connecting rod 7 is first put on the rotating shaft 6, and the ball 13 then forms a match with the track groove 10 through the first radial through hole 12 and limits the relative position of the piston connecting rod 7. Then, the pneumatic piston 8 is installed. When the pneumatic piston 8 is installed in place and forms a tight fit with the piston connecting rod 7, the rotating shaft 6, the piston connecting rod 7 and the ball 13 can form corresponding position limitations. Then, the above-mentioned components are installed on the rear cylinder cover 2 through the pin shaft 9, and finally, the assembly with the cylinder body 1 and the pressing component 5 is completed. The overall installation is simple and convenient.

[0038] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A 90° angle cylinder, comprising a cylinder body (1), and a rear cylinder cover (2) connected to a piston assembly, wherein the cylinder body (1) is provided with a cylindrical inner cavity (3) whose bottom is completely penetrated to form a mounting opening, the rear cylinder cover (2) is mounted in the mounting opening, a first axial through hole (4) is further provided at the top center of the cylindrical inner cavity (3) for the upper part of the piston assembly to pass through, a pressing assembly (5) is fixedly connected to the top of the piston assembly, and is characterized in that: The piston assembly is provided with a rotating shaft (6), a piston connecting rod (7), and a pneumatic piston (8) in sequence from the inside to the outside. The lower part of the rotating shaft (6) is fixed to the rear cylinder cover (2) through a pin shaft (9). The upper outer peripheral wall surface of the rotating shaft (6) is provided with a track groove (10) that spirals 90 degrees and reaches the top. The bottom surface of the piston connecting rod (7) is provided with a radial blind hole (11). The radial blind hole (11) matches the upper part of the rotating shaft (6) and the lower part thereof is provided with a first radial through hole (12). The first radial through hole (12) is used to install a ball (13) adapted to the track groove (10). The center of the pneumatic piston (8) is provided with a second axial through hole (14). The inner wall surface of the second axial through hole (14) is tightly matched with the lower outer wall surface of the piston connecting rod (7) to form a limit for the ball (13).

2. A 90° rotating cylinder according to claim 1, characterized in that: The upper section of the inner wall surface of the second axial through hole (14) is set as a first small diameter surface (15), and the diameter of the first small diameter surface (15) is smaller than the diameter of the lower outer wall surface of the piston connecting rod (7).

3. A 90° rotating cylinder according to claim 2, characterized in that: The bottom section of the lower outer wall surface of the piston connecting rod (7) is provided with a second small diameter surface (16), the diameter of the second small diameter surface (16) is consistent with the diameter of the bottom section of the inner wall surface of the second axial through hole (14), and the first radial through hole (12) is formed on the second small diameter surface (16).

4. A 90° rotating cylinder according to claim 3, characterized in that: An annular sealing groove (17) is formed at a position of the piston connecting rod (7) relative to the first small diameter surface (15), and the annular sealing groove (17) is used to install a sealing ring.

5. The 90° rotating cylinder according to claim 1, characterized in that: The cylinder body (1) is provided with a first air pipe hole (18) formed in a radial direction on the peripheral wall surface relative to the first axial through hole (4); the first air hole (19) of the cylinder is arranged in the axial direction and connects the first air pipe hole (18) and the upper end of the cylindrical inner cavity (3); and the top end of the pneumatic piston (8) is provided with a first convex portion (20) surrounding the second axial through hole (14).

6. A 90° rotating cylinder according to claim 5, characterized in that: A second air pipe hole (21) formed in the radial direction is provided on the peripheral wall surface of the cylinder body (1), the second air hole (22) of the cylinder is arranged in the radial direction and connects the second air pipe hole (21) and the lower end of the cylindrical inner cavity (3), and the bottom end of the pneumatic piston (8) is provided with a second convex portion (23) surrounding the second axial through hole (14), and the top end of the rear cylinder cover (2) is provided with a third convex portion (25) surrounding the third axial through hole (24).

7. The 90° rotating cylinder according to claim 1, characterized in that: Two symmetrical track grooves (10) are provided on the rotating shaft (6), the ball (13), the first radial through hole (12) and the track groove (10) are arranged correspondingly, and vertical sections (26) along the axial direction are provided at both upper and lower ends of the track groove (10).

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