Air cylinder special for textile machine

Abstract

A special air cylinder for a textile machine comprises a circular cylinder body, a piston and a piston rod, a front cover and a rear cover are arranged at two ends of the circular cylinder body, an exhaust hole is formed in the outer end of the front cover, an air inlet hole is formed in the outer end of the rear cover, an internal thread blind hole is formed in the center of the upper end face of the piston, and a small-diameter external thread section is arranged at the bottom of the inner end of the piston rod. The center of the bottom end face of the piston is further provided with a fixing boss in a protruding mode, a first annular buffering pad is installed on the circumferential wall of the fixing boss, the center of the upper end face of the rear cover is provided with an avoiding blind hole corresponding to the fixing boss, and the air inlet hole penetrates through the side wall of the avoiding blind hole in the radial direction. A second annular buffering cushion is installed on the outer thread section of the piston rod and above the piston, a spring seat is further formed at the inner end of the front cover, and a reset spring is arranged between the upper end of the piston and the spring seat. The buffering and resetting device is reasonable and compact in overall structure and good in buffering and resetting effect.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinders, in particular to a special cylinder for textile machines. Background Art

[0002] Textile machinery (such as textile machines) requires the coordinated operation of multiple actuators to shape and weave fabric. To ensure the proper functioning of these actuators, pneumatic cylinders are typically installed on the machinery, connecting the actuators to the cylinder's piston rod, which then drives the actuators. However, existing pneumatic cylinders for textile machines often suffer from complex structures and unsatisfactory reset performance, necessitating structural innovation. Utility Model Content

[0003] In view of the shortcomings of the above-mentioned prior art, the purpose of the present utility model is to provide a special cylinder for textile machines which has a reasonable and compact structure and good buffering and resetting effects.

[0004] The technical solution adopted by the utility model to solve its technical problem is a special cylinder for textile machines, comprising a circular cylinder body, a piston and a piston rod, the upper end of the circular cylinder body is provided with a front cover, the outer end of the front cover is provided with an exhaust hole, the lower end of the circular cylinder body is provided with a rear cover, the outer end of the rear cover is provided with an air inlet hole, the piston is slidably arranged in the circular cylinder body, the piston rod passes through the front cover and is fixedly connected to the piston, the center of the upper end face of the piston is provided with an internal threaded blind hole, the bottom of the inner end of the piston rod is provided with an external threaded section with a small diameter, and the external threaded section is threadedly fixedly connected to the internal threaded blind hole Then, a fixing boss is also provided at the center of the bottom end surface of the piston, and a first annular buffer pad is installed on the peripheral wall of the fixing boss. A blind hole is provided at the center of the upper end surface of the rear cover corresponding to the fixed boss, and the air inlet radially penetrates the side wall of the blind hole. A second annular buffer pad is installed above the external threaded section and the piston of the piston rod. A spring seat is also formed at the inner end of the front cover, and the inner hole diameter of the spring seat is larger than the diameter of the piston rod. A return spring is provided between the upper end of the piston and the spring seat, and the return spring is arranged on the outside of the second annular buffer pad.

[0005] The advantages of adopting the above scheme are as follows: as the air enters the air inlet hole, the piston and the piston rod move up synchronously, and the return spring arranged between the front cover and the piston is compressed, so that the elastic potential energy is gradually accumulated. In the compression process, the gas above the piston in the circular cylinder body will be discharged through the exhaust hole, which can effectively reduce the movement resistance of the piston. After the return spring releases its accumulated elastic potential energy, the piston can drive the piston rod to quickly return to its original position, thereby entering the next work. In addition, a spring seat is provided at the inner end of the front cover, so that the position fixing effect of the return spring is better. An internal threaded blind hole is also provided on the piston, and the inner end bottom of the piston rod is provided as an external threaded section. The threaded connection method is used to connect and fix the piston rod and the piston, which is easy to install. A fixed boss is set at the center of the bottom end surface of the piston. The fixed boss can effectively limit the position of the first annular buffer pad. With the cooperation of the avoidance blind hole, the bottom of the piston is prevented from rigidly colliding with the rear cover. The setting of the second annular buffer pad is also used to prevent the top of the piston from rigidly colliding with the front cover. Therefore, it can play a good buffering role. The position of the air inlet is also set on the rear cover and connected to the avoidance blind hole. The position setting is also reasonable. Therefore, the overall structural design is reasonable and compact. At the same time, the service life of the cylinder is longer and the reset effect is better.

[0006] Furthermore, a first sealing ring groove is provided on the peripheral wall surface of the piston, a first sealing ring is installed in the first sealing ring groove, and the cross section of the first sealing ring is set to be an inverted Y shape.

[0007] In the above scheme, a first sealing ring groove is provided on the peripheral wall surface of the piston, and a first sealing ring is provided in the first sealing ring groove to prevent the gas discharged from the air inlet from escaping upward. The cross-section of the first sealing ring is also set to an inverted Y shape. In this way, the inside and outside of the first sealing ring can form an elastic sealing fit, and the sealing effect is better.

[0008] Furthermore, the inner end of the rear cover is set as a first fixed head that tightly fits with the inner wall surface of the lower end of the circular cylinder body, the spring seat is formed on the first fixed head, and a second sealing ring groove is provided at the top of the peripheral wall surface of the first fixed head, a second sealing ring is installed in the second sealing ring groove, and a first installation ring groove is also provided at the bottom of the peripheral wall surface of the first fixed head.

[0009] In the above scheme, by setting the first fixing head, it can support the opening at the lower end of the circular cylinder body, so that the lower end of the circular cylinder body is not easily deformed. The setting of the second sealing ring groove and the second sealing ring makes the sealing effect of the back cover good. The setting of the first mounting ring groove, after the back cover is installed in place, the lower end of the circular cylinder body can be squeezed and deformed by an external tool to form a fixed fit with the first mounting ring groove, so that the back cover can be fixed, and the installation is simple and stable.

[0010] Furthermore, the outer end of the rear cover is configured to form a first limit platform that forms abutment and limit with the bottom of the lower end of the circular cylinder body, the first fixed head is arranged at the center of the upper surface of the first limit platform, and the middle part of the bottom surface of the lower end of the first limit platform is also provided with an installation groove with two ends passing through, and the two side walls of the installation groove are also penetrated by fixing holes.

[0011] In the above scheme, the setting of the first limit platform can limit the installation position of the rear cover, and a mounting groove with a fixed through hole is provided on the lower end of the first limit platform. During installation, the cylinder is quickly installed on the textile machine through the mounting groove on the rear cover, and then fixed by screwing through the fixed through hole, which makes installation and disassembly convenient.

[0012] Furthermore, the inner end of the front cover is provided as a second fixing head that is tightly matched with the inner wall surface of the upper end of the circular cylinder body, and a second mounting ring groove is further provided at the top of the peripheral wall surface of the second fixing head.

[0013] In the above scheme, by setting a second fixed head, it can support the opening at the upper end of the circular cylinder body, so that the upper end of the circular cylinder body is not easily deformed. After the front cover is installed in place, the second mounting ring groove can be used to extrude and deform the upper end of the circular cylinder body through an external tool to form a fixed fit with the second mounting ring groove, so that the front cover can be fixed. The installation is simple and stable.

[0014] Furthermore, the upper end of the front cover is configured to form a second limit platform that abuts and limits the top of the upper end of the circular cylinder body, the second fixed head is arranged at the center of the upper surface of the second limit platform, and the upper end of the front cover is also provided with a support head at the top center of the second limit platform, and the inner hole diameter of the support head is consistent with the diameter of the piston rod.

[0015] In the above solution, the provision of the second limit platform can define the installation position of the front cover, and also make the axial movement of the piston rod smoother by providing a support head with an inner hole diameter consistent with the diameter of the piston rod.

[0016] Furthermore, the top of the outer end of the piston rod is connected to at least two fixing nuts.

[0017] In the above solution, the provision of the fixing nut enables effective connection and fixation between the piston rod and the external fixture. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is a partial structural sectional view of the utility model;

[0020] Figure 3 This is a schematic diagram of the back cover structure of the present utility model.

[0021] In the figure: 1-circular cylinder body, 2-piston, 3-piston rod, 4-front cover, 5-exhaust hole, 6-rear cover, 7-air inlet, 8-inner thread blind hole, 9-external thread segment, 10-fixed boss, 11-first annular buffer pad, 12-avoidance blind hole, 13-second annular buffer pad, 14-spring seat, 15-return spring, 16-first sealing ring groove, 17-first sealing ring, 18-first fixing head, 19-second sealing ring groove, 20-second sealing ring, 21-first mounting ring groove, 22-first limiting platform, 23-mounting through groove, 24-fixed through hole, 25-second fixing head, 26-second mounting ring groove, 27-second limiting platform, 28-support head, 29-fixing nut. DETAILED DESCRIPTION

[0022] To more clearly illustrate the embodiments of the present invention and / or the technical solutions in the prior art, the following describes specific embodiments of the present invention with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. A person skilled in the art can, without inventive effort, derive other drawings and other embodiments from these drawings. References to orientations only represent relative positional relationships between components, not absolute positional relationships.

[0023] See also Figures 1 to 3As shown, a special cylinder for textile machines includes a circular cylinder body 1, a piston 2 and a piston rod 3. The upper end of the circular cylinder body 1 is provided with a front cover 4, and the outer end of the front cover 4 is provided with an exhaust hole 5. The lower end of the circular cylinder body 1 is provided with a rear cover 6, and the outer end of the rear cover 6 is provided with an air inlet 7. The piston 2 is slidably arranged in the circular cylinder body 1, and the piston rod 3 passes through the front cover 4 and is fixedly connected to the piston 2. The center of the upper end surface of the piston 2 is provided with an internal threaded blind hole 8, and the bottom of the inner end of the piston rod 3 is provided with a small-diameter external threaded section 9. The external threaded section 9 is threadedly fixedly connected to the internal threaded blind hole 8, and the connection between the piston rod 3 and the piston 2 is achieved by threaded connection. Fixed, easy to install, a fixed boss 10 is also convexly provided at the center of the bottom end face of the piston 2, and a first annular buffer pad 11 is installed on the peripheral wall of the fixed boss 10. The fixed boss 10 can effectively limit the position of the first annular buffer pad 11, and a blind hole 12 is provided at the center of the upper end face of the rear cover 6 corresponding to the fixed boss 10. The setting of the blind hole 12 can effectively generate deformation buffering during the resetting process of the piston 2, so that the bottom of the piston 2 can avoid rigid collision with the rear cover 6. The air inlet 7 radially penetrates the side wall of the blind hole 12, and the position setting is reasonable, so that the piston 2 can be maximized. A second annular buffer pad 13 is installed above the external threaded section 9 and the piston 2 of the piston rod 3. The setting of the second annular buffer pad 13 prevents the top of the piston 2 from rigidly colliding with the front cover 4. Therefore, it can play a good buffering role in the axial movement of the piston 2. A spring seat 14 is also formed at the inner end of the front cover 4. The inner hole diameter of the spring seat 14 is larger than the diameter of the piston rod 3. A return spring 15 is provided between the upper end of the piston 2 and the spring seat 14. The return spring 15 is arranged outside the second annular buffer pad 13. The setting of the spring seat 14 makes the return spring 1 4 has a good position fixing effect. In the above structure, as the air enters the air inlet hole 7, the piston 2 and the piston rod 3 move up synchronously, and the return spring 15 arranged between the front cover 4 and the piston 2 is compressed, so that the elastic potential energy is gradually accumulated. In the compression process, the gas above the piston 2 in the circular cylinder body 1 will be discharged through the exhaust hole 5, which can effectively reduce the movement resistance of the piston 2. After the return spring 15 releases its accumulated elastic potential energy, the piston 2 can drive the piston rod 3 to reset quickly, thereby entering the next work. The overall structural design is reasonable and compact. At the same time, the service life of the cylinder is longer and the reset effect is good.

[0024] In this embodiment, a first sealing ring groove 16 is provided on the peripheral wall surface of the piston 2, and a first sealing ring 17 is installed in the first sealing ring groove 16. The cross-section of the first sealing ring 17 is set to an inverted Y shape. By providing the first sealing ring groove 16 on the peripheral wall surface of the piston 2 and arranging the first sealing ring 17 in the first sealing ring groove 16, the purpose of preventing the gas discharged from the air inlet 7 from rising is achieved. The cross-section of the first sealing ring 17 is also set to an inverted Y shape. In this way, the inside and outside of the first sealing ring 17 can form an elastic sealing fit, and the sealing effect is better.

[0025] In this embodiment, the inner end of the rear cover 6 is set to a first fixing head 18 that closely fits with the inner wall surface of the lower end of the circular cylinder body 1. By setting the first fixing head 18, it can support the opening of the lower end of the circular cylinder body 1, so that the lower end of the circular cylinder body 1 is not easily deformed. The spring seat 14 is formed on the first fixing head 18, and a second sealing ring groove 19 is provided at the top of the peripheral wall surface of the first fixing head 18. A second sealing ring 20 is installed in the second sealing ring groove 19. The setting of the second sealing ring groove 19 and the second sealing ring 20 ensures a good sealing effect of the rear cover 6 and can prevent gas leakage. A first mounting ring groove 21 is also provided at the bottom of the peripheral wall surface of the first fixing head 18. With the setting of the first mounting ring groove 21, after the rear cover 6 is installed in place, the lower end of the circular cylinder body 1 can be squeezed and deformed by an external tool to form a fixed fit with the first mounting ring groove 21, so that the rear cover 6 can be fixed, and the installation is simple and stable.

[0026] In this embodiment, the outer end of the rear cover 6 is set to form a first limit platform 22 that abuts against the bottom of the lower end of the circular cylinder body 1. The first fixing head 18 is set at the center of the upper surface of the first limit platform 22. The setting of the first limit platform 22 can limit the installation position of the rear cover 6. A mounting groove 23 with two ends passing through is also provided in the middle of the bottom surface of the lower end of the first limit platform 22. Fixed through holes 24 are also penetrated on the two side walls of the mounting groove 23. In this way, when installing, the cylinder can be quickly installed on the textile machine through the mounting groove 23 on the rear cover 6, and then fixed by screwing through the fixed through holes 24, which makes installation and disassembly convenient.

[0027] In this embodiment, the avoidance blind hole 12 extends from the top surface of the first fixing head 18 to the first limit platform 22, and the air inlet hole 7 is arranged on the peripheral wall surface of the first limit platform 22 and radially penetrates to the avoidance blind hole 12. The position of the air inlet hole 7 is reasonably set.

[0028] In this embodiment, the inner end of the front cover 4 is set as a second fixing head 25 that tightly fits with the inner wall surface of the upper end of the circular cylinder body 1. A second mounting ring groove 26 is also provided at the top of the peripheral wall surface of the second fixing head 25. By providing the second fixing head 25, it can support the opening at the upper end of the circular cylinder body 1, so that the upper end of the circular cylinder body is not easily deformed. After the front cover 4 is installed in place, the upper end of the circular cylinder body 1 can be squeezed and deformed by an external tool to form a fixed fit with the second mounting ring groove 26, so that the front cover 4 can be fixed, and the installation is simple and stable.

[0029] In this embodiment, the upper end of the front cover 4 is provided with a second limit platform 27 which is abutted against the top of the upper end of the circular cylinder body 1 to limit the installation position of the front cover 4. The second fixing head 25 is provided at the center of the upper surface of the second limit platform 27. At the same time, a support head 28 is provided at the upper end of the front cover 4 at the center of the top of the second limit platform 27. The inner hole diameter of the support head 28 is consistent with the diameter of the piston rod 3. By providing the support head 28 with an inner hole diameter consistent with the diameter of the piston rod 3, the axial movement of the piston rod 3 is made smoother.

[0030] In this embodiment, the inner hole of the support head 28 extends to the second limiting platform 27, the exhaust hole 5 is provided on the peripheral wall surface of the second limiting platform 27 and radially penetrates into the above inner hole, and the position of the exhaust hole 5 is reasonably set.

[0031] In this embodiment, at least two fixing nuts 29 are connected to the top of the outer end of the piston rod 3. The setting of the fixing nuts 27 realizes the effective connection and fixation between the piston rod 3 and the external fixture.

[0032] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A special cylinder for textile machines, comprising a circular cylinder body (1), a piston (2) and a piston rod (3), wherein the upper end of the circular cylinder body (1) is provided with a front cover (4), the outer end of the front cover (4) is provided with an exhaust hole (5), the lower end of the circular cylinder body (1) is provided with a rear cover (6), the outer end of the rear cover (6) is provided with an air inlet hole (7), the piston (2) is slidably arranged in the circular cylinder body (1), the piston rod (3) passes through the front cover (4) and is fixedly connected to the piston (2), and is characterized in that: The center of the upper end face of the piston (2) is provided with an internal thread blind hole (8), the bottom of the inner end of the piston rod (3) is provided with an external thread section (9) with a small diameter, and the external thread section (9) is threadedly fixedly connected to the internal thread blind hole (8), and the center of the bottom end face of the piston (2) is also provided with a fixed boss (10), and a first annular buffer pad (11) is installed on the peripheral wall of the fixed boss (10), and the center of the upper end face of the rear cover (6) is provided with an avoidance blind hole (12) corresponding to the fixed boss (10), and the air inlet ( 7) radially penetrates the side wall of the avoidance blind hole (12), the piston rod (3) is installed with a second annular buffer pad (13) above the external thread section (9) and the piston (2), the inner end of the front cover (4) also forms a spring seat (14), the inner hole diameter of the spring seat (14) is larger than the diameter of the piston rod (3), a return spring (15) is provided between the upper end of the piston (2) and the spring seat (14), and the return spring (15) is arranged on the outside of the second annular buffer pad (13).

2. The special cylinder for textile machines according to claim 1, characterized in that: A first sealing ring groove (16) is provided on the peripheral wall surface of the piston (2), a first sealing ring (17) is installed in the first sealing ring groove (16), and the cross section of the first sealing ring (17) is set to be an inverted Y shape.

3. The special cylinder for textile machines according to claim 1, characterized in that: The inner end of the rear cover (6) is provided as a first fixed head (18) tightly matched with the inner wall surface of the lower end of the circular cylinder body (1), the spring seat (14) is formed on the first fixed head (18), and a second sealing ring groove (19) is provided at the top of the peripheral wall surface of the first fixed head (18), a second sealing ring (20) is installed in the second sealing ring groove (19), and a first mounting ring groove (21) is also provided at the bottom of the peripheral wall surface of the first fixed head (18).

4. The special cylinder for textile machines according to claim 3, characterized in that: The outer end of the rear cover (6) is configured to form a first limiting platform (22) for abutting and limiting against the bottom of the lower end of the circular cylinder body (1); the first fixing head (18) is provided at the center of the upper surface of the first limiting platform (22); a mounting groove (23) passing through at both ends is further provided in the middle of the bottom surface of the lower end of the first limiting platform (22); and fixing through holes (24) are further provided on the two side walls of the mounting groove (23).

5. The special cylinder for textile machines according to claim 1, characterized in that: The inner end of the front cover (4) is provided with a second fixing head (25) that is tightly matched with the inner wall surface of the upper end of the circular cylinder (1), and a second mounting ring groove (26) is further provided at the top of the peripheral wall surface of the second fixing head (25).

6. The special cylinder for textile machines according to claim 5, characterized in that: The outer end of the front cover (4) is provided as a second limiting platform (27) for abutting and limiting against the top of the upper end of the circular cylinder body (1); the second fixing head (25) is provided at the center of the upper surface of the second limiting platform (27); the upper end of the front cover (4) is further provided with a supporting head (28) at the center of the top of the second limiting platform (27); the inner hole diameter of the supporting head (28) is consistent with the diameter of the piston rod (3).

7. The special cylinder for textile machines according to claim 1, characterized in that: The top of the outer end of the piston rod (3) is also connected to at least two fixing nuts (29).

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