Novel six-position gear shifting air cylinder

Abstract

The utility model relates to the field of heavy mechanical equipment, and discloses a novel six-position gear shifting air cylinder which comprises a cylinder body, the right side of the cylinder body is fixedly connected with an air cylinder front cover through an inner hexagon screw and a gasket, a dustproof assembly is arranged in the end face of the right side of the air cylinder front cover, and a piston rod is slidably connected in the dustproof assembly. The left end of the piston rod is fixedly connected to the interior of the first piston through a hexagon head bolt and a spring washer, a small check ring is arranged on the periphery of the piston rod, and a middle check ring and a large check ring are arranged on the periphery of the small check ring. According to the six-position gear shifting air cylinder, the check rings are arranged, connection and disconnection of different air paths are achieved during gear shifting, air intake and exhaust of the six-position gear shifting air cylinder are accurately controlled, the gear shifting action of the six-position gear shifting air cylinder is achieved, meanwhile, the air cylinder body, the check rings and the piston are subjected to hard anodic oxidation treatment, the piston rod is subjected to hard chromium plating treatment, abrasion resistance is guaranteed, and the service life is long. And reliable work is ensured.

Description

Technical Field

[0001] The utility model relates to the field of heavy machinery and equipment, in particular to a new type of six-position shifting cylinder. Background Art

[0002] Heavy machinery and equipment are mechanical devices with large volume, heavy weight and high power, and are widely used in industries such as industry, construction, mining and agriculture. They are mainly used to undertake a large amount of work, such as excavation, loading, bulldozing, compaction, hoisting, etc. These devices are usually driven by fuel or electricity and have strong working ability and durability.

[0003] In heavy machinery and equipment, the shifting mechanism needs to bear large loads and impacts. Since the gas itself has good compressibility in the pneumatic mode, the actuator can have greater yielding ability. Therefore, a new type of six-position shifting cylinder is required to perform the shifting of heavy machinery and equipment.

[0004] The current six-position shifting cylinder inputs compressed air into the cylinder through different air inlet holes on the cylinder sleeve, controls the logical combined movement of a set of stop rings and pistons in the cylinder, realizes the step-by-step extension and retraction of the piston rod of the piston, drives the step valve spool of the hydraulic transmission to act step by step, and then controls the oil inlet and oil discharge of the hydraulic clutches of each gear of the hydraulic transmission, controls the clutch state of each gear, and finally realizes the shifting of the hydraulic transmission. However, the logical combined movement of the stop ring and piston of the current shifting cylinder has relatively high requirements for the working medium (compressed air). During the working process of the six-position shifting cylinder, there will be continuous friction between each component and the cylinder barrel. After long-term use, it may cause wear, which will in turn affect the sealing performance, resulting in poor shifting or leakage. Therefore, a new type of six-position shifting cylinder is proposed to solve the above problems. Summary of the Invention

[0005] In order to make up for the above deficiencies, the utility model provides a new type of six-position shifting cylinder, aiming to improve the problems that the logical combined movement of the stop ring and piston of the current shifting cylinder in the prior art has relatively high requirements for the working medium and may cause wear after long-term use, resulting in poor shifting.

[0006] To achieve the above object, the utility model adopts the following technical solutions: A new type of six-position shift cylinder, including a cylinder block, the right side of the cylinder block is fixedly connected with a cylinder front cover through an internal hexagonal screw and a washer, a dust-proof component is arranged inside the right end face of the cylinder front cover, a piston rod is slidably connected inside the dust-proof component, the left end of the piston rod is fixedly connected inside a first piston through a hexagonal head bolt and a spring washer, a small stop ring is arranged on the outer periphery of the piston rod, a middle stop ring and a large stop ring are arranged on the outer periphery of the small stop ring, a hole retaining ring is fixedly connected inside the large stop ring, a spring seat is arranged on the outer periphery of the piston rod, a retaining ring is fixedly connected to the outer periphery of the piston rod through an elastic cylindrical pin, the left end of the cylinder block is fixedly connected with a cylinder head through an internal hexagonal screw, a second piston is slidably connected inside the cylinder head, a push rod is slidably connected on the outer periphery of the second piston, the left end of the push rod is fixedly connected with a shaft retaining ring, and a left stop ring is slidably connected on the outer periphery of the push rod.

[0007] As a further description of the above technical solution:

[0008] An O-ring one is arranged inside the sealing groove on the outer periphery of the second piston, an O-ring three is arranged inside the sealing groove on the inner side of the second piston, an O-ring four is arranged inside the sealing groove of the left stop ring, an O-ring five is arranged inside the sealing groove on the outer periphery of the left stop ring, an O-ring six is arranged inside the sealing groove on the outer periphery of the first piston, an O-ring seven is arranged inside the sealing groove inside the first piston, an O-ring eight is arranged inside the sealing groove on the outer periphery of the middle stop ring, an O-ring nine is arranged inside the sealing groove inside the middle stop ring, an O-ring twelve is arranged inside the sealing groove on the outer periphery of the small stop ring, an O-ring thirteen is arranged inside the sealing groove inside the small stop ring, and an O-ring ten is arranged inside the sealing groove on the outer periphery of the large stop ring.

[0009] As a further description of the above technical solution:

[0010] An O-ring eleven is arranged at the connection between the cylinder block and the cylinder front cover, and an O-ring two is arranged at the connection between the cylinder block and the cylinder head.

[0011] As a further description of the above technical solution:

[0012] The dust-proof component includes a copper sleeve, the outer periphery of the copper sleeve is fixedly connected inside the cylinder front cover, a shaft dust-proof ring is arranged inside the copper sleeve, and the outer periphery of the piston rod is slidably connected inside the shaft dust-proof ring and the copper sleeve.

[0013] As a further description of the above technical solution:

[0014] The outer peripheries of the middle stop ring and the large stop ring are slidably connected inside the cylinder block, and the outer periphery of the left stop ring is slidably connected inside the cylinder head.

[0015] As a further description of the above technical solution:

[0016] The left side of the spring seat is elastically connected to the right side of the large stop ring through a spring, and the right side of the spring seat is in contact with the inner wall of the left side of the cylinder front cover.

[0017] As a further description of the above technical solution:

[0018] A cavity is provided inside the spring seat, and the elastic cylindrical pin and the retaining ring are arranged in the internal cavity of the spring seat.

[0019] As a further description of the above technical solution:

[0020] The right end of the small stop ring is in contact with the left side of the hole retaining ring, and the left side of the second piston is in contact with the right side of the shaft retaining ring.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, by setting the left stop ring, small stop ring, middle stop ring, and large stop ring, the on-off of different air paths is realized during gear shifting, so as to accurately control the air intake and exhaust of the six-position shift cylinder, realize the shifting action of the six-position shift cylinder. At the same time, the cylinder block, stop ring, and piston are treated with hard anodizing, and the piston rod is treated with hard chromium plating, ensuring wear resistance and long service life, and ensuring reliable operation.

[0023] 2. In the utility model, by setting multiple groups of O-rings at each connection, the sealing performance is improved, the response sensitivity can be ensured, the failure rate of the six-position shift cylinder can be effectively reduced, the long-term reliable operation of the cylinder can be ensured, and at the same time, the reliable operation of the six-position shift cylinder in a low-temperature environment can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the internal structure of a novel six-position shift cylinder proposed by the utility model.

[0025] Legend:

[0026] 1. Hexagon socket head screw; 2. Cylinder head; 3. O-ring I; 4. Shaft retaining ring; 5. Thumb lever; 6. O-ring II; 7. Second piston; 8. O-ring III; 9. O-ring IV; 10. Left stop ring; 11. O-ring V; 12. Cylinder block; 13. Hexagon head bolt; 14. O-ring VI; 15. Spring washer; 16. First piston; 17. O-ring VII; 18. Small stop ring; 19. Middle stop ring; 20. O-ring VIII; 21. O-ring IX; 22. O-ring X; 23. O-ring XI; 24. O-ring XII; 25. O-ring XIII; 26. Large stop ring; 27. Hole retaining ring; 28. Washer; 29. Spring; 30. Spring seat; 31. Elastic cylindrical pin; 32. Retaining ring; 33. Cylinder front cover; 34. Copper bushing; 35. Shaft dust-proof ring; 36. Piston rod. Detailed implementation mode

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0028] Refer to Figure 1 , an embodiment provided by the present invention: a novel six-position shift cylinder, including a cylinder block 12. The right side of the cylinder block 12 is fixedly connected with a cylinder head 33 through an internal hexagonal screw 1 and a washer 28 to ensure firm connection. A dust-proof component is arranged inside the right end face of the cylinder head 33. The dust-proof component is used to reduce dust from entering the cylinder head 33. The dust-proof component includes a copper sleeve 34. The outer circumference of the copper sleeve 34 is fixedly connected inside the cylinder head 33. An axial dust-proof ring 35 for improving the sealing performance is arranged inside the copper sleeve 34. The outer circumference of the piston rod 36 is slidably connected inside the axial dust-proof ring 35 and the copper sleeve 34. The piston rod 36 is slidably connected inside the dust-proof component. Different gear positions are engraved on the outer side end of the piston rod 36. The piston rod 36 is treated with hard chromium plating to ensure wear resistance and long service life, and to ensure reliable operation. The left end of the piston rod 36 is fixedly connected inside the first piston 16 through a hexagonal head bolt 13 and a spring washer 15 to ensure firm connection.

[0029] Furthermore, a small stop ring 18 is arranged on the outer circumference of the piston rod 36. A middle stop ring 19 and a large stop ring 26 are arranged on the outer circumference of the small stop ring 18. By the relative sliding of the three stop rings, the size of the gear position is adjusted. The outer circumferences of the middle stop ring 19 and the large stop ring 26 are slidably connected inside the cylinder block 12. A hole retaining ring 27 is fixedly connected inside the large stop ring 26. The right end of the small stop ring 18 is in contact with the left side of the hole retaining ring 27 to limit the moving position of the small stop ring 18. A spring seat 30 is arranged on the outer circumference of the piston rod 36. The left side of the spring seat 30 is elastically connected to the right side of the large stop ring 26 through a spring 29. When the large stop ring 26 is not stressed, the spring 29 will push the large stop ring 26 to the left. The right side of the spring seat 30 is in contact with the left inner wall of the cylinder head 33. A retaining ring 32 is fixedly connected to the outer circumference of the piston rod 36 through an elastic cylindrical pin 31. A cavity is arranged inside the spring seat 30. The elastic cylindrical pin 31 and the retaining ring 32 are arranged in the inner cavity of the spring seat 30 to provide a certain buffer between the piston rod 36 and the spring seat 30 and reduce wear between components. The cylinder block 12, the stop rings and the pistons are treated with hard anodizing to ensure corrosion resistance.

[0030] Further, the left end of the cylinder block 12 is fixedly connected to the cylinder head 2 by an internal hexagonal screw 1. A second piston 7 is slidably connected inside the cylinder head 2. A push rod 5 is slidably connected to the outer periphery of the second piston 7. The push rod 5 is coaxial with the piston rod 36. A shaft retaining ring 4 is fixedly connected to the left end of the push rod 5. The left side of the second piston 7 is in contact with the right side of the shaft retaining ring 4. The shaft retaining ring 4 is used to limit the maximum sliding position of the second piston 7. A left stop ring 10 is slidably connected to the outer periphery of the push rod 5, and the outer periphery of the left stop ring 10 is slidably connected inside the cylinder head 2.

[0031] Further, an O-ring I 3 is arranged in the inner sealing groove of the outer periphery of the second piston 7, and an O-ring III 8 is arranged in the inner sealing groove of the inner side of the second piston 7 to ensure the sealing performance of the second piston 7. An O-ring IV 9 is arranged in the inner sealing groove of the left stop ring 10, and an O-ring V 11 is arranged in the outer sealing groove of the outer periphery of the left stop ring 10 to improve the sealing performance of the left stop ring 10. An O-ring VI 14 is arranged in the inner sealing groove of the outer periphery of the first piston 16, and an O-ring VII 17 is arranged in the inner sealing groove of the first piston 16 to ensure the sealing performance of the first piston 16. An O-ring VIII 20 is arranged in the inner sealing groove of the outer periphery of the middle stop ring 19, and an O-ring IX 21 is arranged in the inner sealing groove of the middle stop ring 19. An O-ring XII 24 is arranged in the inner sealing groove of the outer periphery of the small stop ring 18, and an O-ring XIII 25 is arranged in the inner sealing groove of the small stop ring 18. An O-ring X 22 is arranged in the inner sealing groove of the outer periphery of the large stop ring 26. The O-rings ensure good sealing performance between the stop rings. An O-ring XI 23 is arranged at the connection between the cylinder block 12 and the front cylinder head 33, and an O-ring II 6 is arranged at the connection between the cylinder block 12 and the cylinder head 2. While ensuring good sealing performance, it prevents debris from entering the inside of the cylinder block 12.

[0032] Working principle: When there is no air pressure entering the six-position shift cylinder, under the action of the spring 29, the middle stop ring 19, the small stop ring 18, the large stop ring 26, and the first piston 16 are in force balance and stationary in the neutral position. There are position scales for each gear on the part of the piston rod 36 extending out of the cylinder block 12. Then the current positions of the stop rings and the first piston 16 are the neutral positions of the six-position shift cylinder. Compressed air is input or output through different gas path positions inside the cylinder block 12, so as to accurately control the intake and exhaust of the six-position shift cylinder and realize the shifting action of the six-position shift cylinder.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A novel six-position shift cylinder, comprising a cylinder block (12), characterized in that: On the right side of the cylinder block (12), a cylinder head cover (33) is fixedly connected by an internal hexagonal screw (1) and a washer (28). Inside the right end face of the cylinder head cover (33), a dust-proof component is provided. Inside the dust-proof component, a piston rod (36) is slidably connected. The left end of the piston rod (36) is fixedly connected inside the first piston (16) by a hexagonal head bolt (13) and a spring washer (15). A small stop ring (18) is arranged on the outer periphery of the piston rod (36). A middle stop ring (19) and a large stop ring (26) are arranged on the outer periphery of the small stop ring (18). A hole retaining ring (27) is fixedly connected to the inner side of the large stop ring (26). A spring seat (30) is arranged on the outer periphery of the piston rod (36). A retaining ring (32) is fixedly connected to the outer periphery of the piston rod (36) by an elastic cylindrical pin (31). On the left end of the cylinder block (12), a cylinder head (2) is fixedly connected by an internal hexagonal screw (1). Inside the cylinder head (2), a second piston (7) is slidably connected. A push rod (5) is slidably connected to the outer periphery of the second piston (7). The left end of the push rod (5) is fixedly connected with a shaft retaining ring (4). A left stop ring (10) is slidably connected to the outer periphery of the push rod (5).

2. A novel six-position shift cylinder according to claim 1, characterized in that: An O-ring one (3) is arranged inside the sealing groove on the outer periphery of the second piston (7). An O-ring three (8) is arranged inside the sealing groove on the inner side of the second piston (7). An O-ring four (9) is arranged inside the sealing groove of the left stop ring (10). An O-ring five (11) is arranged inside the sealing groove on the outer periphery of the left stop ring (10). An O-ring six (14) is arranged inside the sealing groove on the outer periphery of the first piston (16). An O-ring seven (17) is arranged inside the sealing groove of the first piston (16). An O-ring eight (20) is arranged inside the sealing groove on the outer periphery of the middle stop ring (19). An O-ring nine (21) is arranged inside the sealing groove of the middle stop ring (19). An O-ring twelve (24) is arranged inside the sealing groove on the outer periphery of the small stop ring (18). An O-ring thirteen (25) is arranged inside the sealing groove of the small stop ring (18). An O-ring ten (22) is arranged inside the sealing groove on the outer periphery of the large stop ring (26).

3. A novel six-position shift cylinder according to claim 1, characterized in that: An O-ring eleven (23) is arranged at the connection between the cylinder block (12) and the cylinder head cover (33). An O-ring two (6) is arranged at the connection between the cylinder block (12) and the cylinder head (2).

4. A novel six-position shift cylinder according to claim 1, characterized in that: The dust-proof component includes a copper sleeve (34). The outer periphery of the copper sleeve (34) is fixedly connected inside the cylinder head cover (33). An axial dust-proof ring (35) is arranged inside the copper sleeve (34). The outer periphery of the piston rod (36) is slidably connected inside the axial dust-proof ring (35) and the copper sleeve (34).

5. A novel six-position shift cylinder according to claim 1, characterized in that: The outer peripheries of the middle stop ring (19) and the large stop ring (26) are slidably connected inside the cylinder block (12). The outer periphery of the left stop ring (10) is slidably connected inside the cylinder head (2).

6. A novel six-position shift cylinder according to claim 1, characterized in that: The left side of the spring seat (30) is elastically connected to the right side of the large stop ring (26) by a spring (29). The right side of the spring seat (30) is in contact with the left inner wall of the cylinder head cover (33).

7. A novel six-position shift cylinder according to claim 1, characterized in that: The spring seat (30) is internally provided with a cavity, and the elastic cylindrical pin (31) and the retaining ring (32) are arranged in the internal cavity of the spring seat (30).

8. A novel six-position shift cylinder according to claim 1, characterized in that: The right end of the small retaining ring (18) is in contact with the left side of the hole retaining ring (27), and the left side of the second piston (7) is in contact with the right side of the shaft retaining ring (4).

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