Supporting leg oil cylinder with mechanical self-locking function

Abstract

The utility model relates to the technical field of hydraulic cylinders, in particular to a supporting leg oil cylinder with a mechanical self-locking function, which comprises a protective cylinder barrel and an oil cylinder barrel, and one end of the oil cylinder barrel is coaxially inserted into the protective cylinder barrel; the piston is fixedly connected into the protection cylinder barrel; one end of the oil cylinder barrel is coaxially inserted into the protection cylinder barrel, the oil cylinder barrel is movably arranged between the piston and the protection cylinder barrel in the axial direction of the protection cylinder barrel, and external threads are arranged on the outer side wall of the oil cylinder barrel; the two fixing pieces are arranged to be in a half ring shape, the two fixing pieces are oppositely arranged and define a fixing ring, and the two fixing pieces are detachably connected; wherein threads are arranged on the inner side wall of the fixing ring, and the fixing ring is arranged on the oil cylinder barrel in a sleeving mode and matched with the external threads on the oil cylinder barrel in a threaded mode. According to the self-locking nut, through the arrangement of the split type fixing ring, the rotating efficiency of the self-locking nut is improved, and pollution of foreign matter to the thread surface is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic cylinders, and in particular to an outrigger oil cylinder with a mechanical self-locking function. Background Art

[0002] The outrigger cylinders used in various engineering machinery equipment need to have a self-locking function when they are not in motion, depending on their working conditions. There are two common self-locking designs at present. One is to use hydraulic self-locking, which has certain leakage and is not stable enough. The other is to use mechanical self-locking, which has no leakage and is stable.

[0003] Mechanical self-locking methods include steel ball lock, expansion sleeve interference lock, disc spring lock and bevel lock, but the above methods are complex in structure and have high processing requirements. Self-locking nuts are also a commonly used self-locking structure. Self-locking nuts achieve self-locking of the cylinder through the self-locking principle of the internal thread of the self-locking nut and the external thread of the cylinder barrel.

[0004] However, the outer thread of the cylinder barrel and the inner thread of the self-locking nut are usually tightly meshed, which is laborious and inefficient to rotate manually. In addition, during the use of the cylinder, the thread surface will be contaminated by small foreign matter, resulting in poor meshing between the two, further reducing efficiency. Utility Model Content

[0005] The technical problem to be solved by the utility model is that when the existing self-locking nut is applied to the self-locking function of the outrigger oil cylinder, in order to reduce the contamination of small foreign matter on the thread surface and improve the bite relationship between the self-locking nut and the external thread of the oil cylinder, the self-locking nut and the external thread of the oil cylinder barrel are tightly matched, which makes the self-locking nut difficult to rotate and the self-locking efficiency is low.

[0006] To this end, the utility model provides an outrigger oil cylinder with a mechanical self-locking function.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A leg oil cylinder with a mechanical self-locking function, comprising:

[0009] Protect the cylinder, and

[0010] A piston, wherein the piston is fixedly connected in the protective cylinder;

[0011] An oil cylinder barrel, one end of which is coaxially inserted into the protective cylinder barrel, the oil cylinder barrel is movably arranged between the piston and the protective cylinder barrel along the axial direction of the protective cylinder barrel, and an external thread is arranged on the outer side wall of the oil cylinder barrel;

[0012] Two fixing members, each of which is arranged in a half ring shape, and the two fixing members are arranged opposite to each other and enclose a fixing ring, and the two fixing members are detachably connected;

[0013] Wherein, a thread is arranged on the inner side wall of the fixing ring, and the fixing ring is sleeved on the cylinder barrel and matched with the external thread on the cylinder barrel.

[0014] By adopting the above technical solution, the fixing ring adopts a split design, so that when the fixing ring is mounted on the cylinder barrel, the tightness of the engagement between the fixing ring and the cylinder barrel can be adjusted, reducing the occurrence of over-tight engagement between the external thread of the cylinder barrel and the internal thread of the fixing ring. By adjusting the distance between the two fixing parts to a suitable position, the fixing ring can be easily tightened with the cylinder barrel and small foreign matter and contaminants can be prevented from entering between the fixing ring and the cylinder barrel, thereby improving work efficiency.

[0015] Furthermore, both ends of the fixing member are connected with connecting plates. When the two fixing members are combined to form a fixing ring, a bolt is provided on the connecting plate on one of the fixing members. The bolt passes through the connecting plate on the other fixing member and is connected with a nut.

[0016] Furthermore, a limiting component is provided between the two fixing members, and the limiting component is used to limit the distance between the two fixing members.

[0017] Furthermore, the limit block assembly includes a first limit block and a second limit block, the fixing parts are respectively the first limit block and the second limit block, the first limit block is connected to the connecting plate on the first fixing part, the second limit block is connected to the connecting plate on the second fixing part, and the first limit block and the second limit block cooperate with each other to limit the distance between the two fixing parts.

[0018] Further, the first limit block includes a first mounting plate and a first limit plate, the second limit block includes a second mounting plate and a second limit plate, the first mounting plate is connected to the connecting plate on the first fixing member, the first limit plate is connected to the side of the first mounting plate facing the second fixing member, a first abutting surface is arranged on the first limit plate, the first abutting surface is arranged in a direction away from the second fixing member, a second abutting surface is arranged on the second limit plate, the second abutting surface is arranged in a direction away from the first fixing member, and the first abutting surface is opposite to the second abutting surface.

[0019] Furthermore, each of the first limiting plate and the second limiting plate includes two branches, and the two branches are perpendicularly arranged to form an L-shape. The branches in the first limiting plate and the second limiting plate that are perpendicular to the plane where the first mounting plate is located are recorded as first branches, and the branches in the first limiting plate and the second limiting plate that are parallel to the plane where the first mounting plate is located are recorded as second branches. The orthographic projections of the two first branches in the plane where the first branches are located overlap, and the orthographic projections of the two second branches in the plane where the second branches are located overlap.

[0020] By adopting the above technology, the distance between the first fixing member and the second fixing member is limited by the mutual cooperation of the first limiting block and the second limiting block, so that the fixing ring and the cylinder barrel are always kept in a mutually engaged state.

[0021] Furthermore, the limiting components are symmetrically arranged on both sides of the fixing ring.

[0022] Furthermore, a piston rod is arranged in the protection cylinder, the piston rod is coaxially fixed in the protection cylinder, the piston and the cylinder barrel are coaxially sleeved on the piston rod, the piston is arranged between the piston rod and the protection cylinder, and the piston is fixedly connected to the piston rod.

[0023] Furthermore, a guide sleeve is provided between the piston rod and the cylinder barrel, and the guide sleeve is fixedly connected to the cylinder barrel.

[0024] Furthermore, an oil seat is fixedly provided at the bottom position in the protective cylinder, and a cavity A and a cavity B are provided on the oil seat. The piston rod is hollow and connected to the cavity B. The piston rod is connected to the oil seat, and a side hole is provided on the side wall of the piston rod. A first oil chamber is formed between the outer wall of the piston rod, the inner wall of the cylinder barrel, the guide sleeve, and the piston, and the side hole connects the first oil chamber and the internal cavity of the piston rod.

[0025] Furthermore, one end of the cylinder barrel extending out of the protective cylinder barrel is connected to a rod head, a second oil chamber is arranged between the rod head, the piston rod, the piston and the cylinder barrel, an oil pipe is arranged in the piston rod, and the oil pipe connects the A chamber of the oil seat and the second oil chamber.

[0026] The beneficial effect of the utility model is that the present application redesigns the self-locking nut, optimizes the original integrated self-locking nut into a split fixing ring, and the first fixing part and the second fixing part are connected together by bolts and nuts, which can adjust the tightness and looseness between the fixing ring and the external thread of the cylinder barrel, and limit the spacing between the first fixing part and the second fixing part by the first limit block and the second limit block, so that the fixing ring and the cylinder barrel always maintain a state of mutual engagement, thereby improving the rotation efficiency of the self-locking nut, reducing the contamination of foreign matter on the thread surface, and reducing the influence of foreign matter on the meshing smoothness between the fixing ring and the cylinder barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 It is a schematic diagram of the overall structure of the outrigger oil cylinder in the utility model.

[0029] Figure 2 It is a structural schematic diagram of the positional relationship between the self-locking component and the cylinder body in the utility model.

[0030] Figure 3 It is a structural schematic diagram of the self-locking component in the utility model.

[0031] Figure 4 It is used to reflect Figure 3 Enlarged view of part A of the middle limit assembly.

[0032] In the figure: 1. cylinder body; 11. protective cylinder barrel; 12. oil cylinder barrel; 13. guide sleeve; 14. piston rod; 15. oil seat; 151. A chamber; 152. B chamber; 153. first oil chamber; 154. second oil chamber; 16. piston; 17. rod head; 18. oil pipe; 2. self-locking assembly; 21. first fixing member; 22. second fixing member; 23. fixing ring; 24. connecting plate; 25. bolt; 26. nut; 27. first limit block; 271. first mounting plate; 272. first limit plate; 273. first abutting surface; 274. first branch A; 275. second branch A; 28. second limit block; 281. second mounting plate; 282. second limit plate; 283. second abutting surface; 284. first branch B; 285. second branch B. DETAILED DESCRIPTION

[0033] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0034] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Reference Figure 1-4 A leg oil cylinder with a mechanical self-locking function comprises a cylinder body 1 and a self-locking assembly 2. The cylinder body 1 comprises a protective cylinder barrel 11, an oil cylinder barrel 12, a piston 16, a piston rod 14, a rod head 17, a guide sleeve 13 and an oil seat 15.

[0037] The oil seat 15 is fixedly connected to a position in the protective cylinder 11 near the bottom of the protective cylinder 11, and is provided with an A cavity 151 and a B cavity 152 on the oil seat 15. The oil seat 15 is connected with a limit platform, and the piston rod 14 is hollow. The piston rod 14 is sleeved on the limit platform and fixedly connected to the oil seat 15. The piston rod 14 is coaxially arranged in the protective cylinder 11. The oil seat 15 is connected with an oil pipe 18, which is passed through the piston rod 14 and penetrates the piston rod 14. The oil pipe 18 is connected to the A cavity 151 on the oil seat 15.

[0038] The piston 16 is sleeved on the piston rod 14, and the piston 16 and the piston rod 14 are fixedly connected. One end of the cylinder barrel 12 is inserted in the protective cylinder barrel 11, and an external thread is provided on the outer wall of the cylinder barrel 12. The cylinder barrel 12 is located between the piston 16 and the protective cylinder barrel 11. The cylinder barrel 11 and the piston 16 are slidably matched, and a seal is provided between the cylinder barrel 12 and the piston 16. The guide sleeve 13 is connected to one end of the cylinder barrel 12 inserted in the protective cylinder barrel 11, and the guide sleeve 13 is sleeved on the piston rod 14 and movably matched with the piston rod 14.

[0039] The rod head 17 is connected to one end of the cylinder barrel 12 away from the cylinder, and a first oil chamber 153 is formed between the outer wall of the piston rod 14, the inner wall of the cylinder barrel 12, the guide sleeve 13, and the piston 16. A side hole is provided on the side wall of the piston rod 14, and the side hole connects the first oil chamber 153 and the internal cavity of the piston rod 14. A second oil chamber 154 is provided between the rod head 17, the piston rod 14, the piston 16, and the cylinder barrel 12. The oil pipe 18 connects the A chamber 151 of the oil seat 15 and the second oil chamber 154 to control the extension and retraction of the rod head 17. When the rod head 17 is extended, the piston rod 14, the oil seat 15, and the piston 16 are fixed in the protective cylinder 11, and the guide sleeve 13 and the cylinder barrel 12 are extended together along the piston rod 14. The hydraulic oil flows into the first oil chamber 153 through the A chamber 151 and the oil pipe 18, and pushes the rod head 17 and the cylinder barrel 12 out of the protective cylinder 11. At this time, the hydraulic oil in the second oil chamber 154 is discharged through the side hole, the cavity in the piston rod 14, and the B chamber 152.

[0040] The self-locking assembly 2 includes a first fixing member 21 and a second fixing member 22. The fixing member is set to be a half ring. The first fixing member 21 and the second fixing member 22 are arranged opposite to each other and enclose a fixing ring 23. The inner wall of the fixing ring 23 is provided with a thread. The fixing ring 23 is sleeved on the cylinder barrel 12 and cooperates with the external thread on the cylinder barrel 12.

[0041] The two fixing members are detachably connected, and connecting plates 24 are connected to both ends of the fixing members. When the two fixing members are combined to form a fixing ring 23, the connecting plate 24 on the first fixing member 21 is arranged opposite to the connecting plate 24 on the second fixing member 22. Bolts 25 are arranged on the connecting plate 24 on the first fixing member 21. The bolts 25 pass through the connecting plate 24 on the other fixing member and are connected to nuts 26.

[0042] The connecting plate 24 on the first fixing member 21 is connected to a first limiting block 27, and the first limiting block 27 includes a first mounting plate 271 and a first limiting plate 272. The first mounting plate 271 is located on a side of the connecting plate 24 away from the second fixing member 22, the first mounting plate 271 is located between the connecting plate 24 and the head of the bolt 25, the first limiting plate 272 is located on a side of the first mounting plate 271 facing the second fixing member 22, and an end of the first mounting plate 271 away from the first fixing member 21 exceeds the end of the connecting plate 24 away from the first fixing member 21, the first limiting plate 272 is set to be L-shaped, one branch of the first limiting plate 272 is perpendicular to the plane where the first mounting plate 271 is located (the branch is marked as the first branch A274), and the other branch is parallel to the plane where the first mounting plate 271 is located (the branch is marked as the second branch A275), the second branch A275 extends toward the fixing member, and the second branch A275 is directed toward the first mounting plate 271 and is parallel to the first mounting plate 271. A first abutting surface 273 is set on the side wall.

[0043] A second limiting block 28 is connected to the connecting plate 24 of the second fixing member 22. The second limiting block 28 includes a second mounting plate 281 and a second limiting plate 282. The second mounting plate 281 is located on a side of the connecting plate 24 away from the first fixing member 21. The second mounting plate 281 is located between the connecting plate 24 and the nut 26. The second limiting plate 282 is located on a side of the second mounting plate 281 facing the first fixing member 21. An end of the second mounting plate 281 away from the second fixing member 22 exceeds an edge of the connecting plate 24 away from the second fixing member 22. The second limiting plate 282 is set to be L-shaped, one branch of the second limiting plate 282 is set perpendicular to the plane where the second mounting plate 281 is located (this branch is recorded as the first branch B284), and the other branch is set parallel to the plane where the second mounting plate 281 is located (this branch is recorded as the second branch B285), the second branch B285 extends in a direction away from the fixing member, and a second abutting surface 283 is set on the side wall of the second branch B285 facing the second mounting plate 281 and parallel to the second mounting plate 281.

[0044] The second branch B285 is located between the second branch A275 and the first mounting plate 271, the second branch A275 is located between the second branch B285 and the second mounting plate 281, the first branch A274 and the first branch B284 overlap in the plane where the first branch A274 is located, and the second branch A275 and the second branch B285 overlap in the plane where the second branch A275 is located. The first abutting surface 273 is opposite to the second abutting surface 283.

[0045] The implementation principle of this application is:

[0046] After the piston rod 14 of the outrigger cylinder is partially extended, the bolt 25 and the nut 26 are loosened, so that the first fixing member 21 and the second fixing member 22 move away from each other until the first abutting surface 273 and the second abutting surface 283 are in contact with each other. At this time, the first fixing member 21 and the second fixing member 22 are moved away from each other to the farthest state, and the fixing ring 23 is sleeved on the cylinder barrel 12. At this time, the meshing gap between the internal thread of the fixing ring 23 and the external thread of the cylinder barrel 12 becomes larger, so less force is required when rotating the locking nut 26, and it can be rotated quickly. Since the first limit block 27 and the second limit block 28 are embedded with each other, the threads always remain in a meshing state and will not disengage, thereby reducing the risk of the fixing ring 23 detaching from the cylinder barrel 12.

[0047] When the fixing ring 23 rotates to fit with the end face of the protective cylinder barrel 11, the bolt 25 and the nut 26 are tightened. At this time, the first abutting surface 273 and the second abutting surface 283 move away from each other, and the connecting plate 24 on the first fixing member 21 and the connecting plate 24 on the second fixing member 22 approach each other or even fit together, so that the gap between the internal thread of the fixing ring 23 and the external thread of the cylinder barrel 12 is reduced, and they are in a normal meshing state, achieving a self-locking effect.

[0048] To summarize, the present application redesigns the self-locking nut, optimizing the original integrated self-locking nut into a split fixing ring, wherein the first fixing part and the second fixing part are connected together by bolts and nuts, and the tension and tightness between the fixing ring and the external thread of the cylinder barrel can be adjusted, and the spacing between the first fixing part and the second fixing part is limited by the first limit block and the second limit block, so that the fixing ring and the cylinder barrel always maintain a state of mutual engagement, thereby improving the rotation efficiency of the self-locking nut, reducing the contamination of the thread surface by foreign matter, and reducing the influence of foreign matter on the meshing smoothness between the fixing ring and the cylinder barrel.

[0049] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A leg oil cylinder with mechanical self-locking function, characterized in that: include, protecting the cylinder (11), and A piston (16), wherein the piston (16) is fixedly connected in the protective cylinder (11); An oil cylinder barrel (12), one end of which is coaxially inserted into the protective cylinder barrel (11), the oil cylinder barrel (12) being movably arranged between the piston (16) and the protective cylinder barrel (11) along the axial direction of the protective cylinder barrel (11), and an external thread being arranged on the outer side wall of the oil cylinder barrel (12); Two fixing members, each of which is arranged in the shape of a half ring, the two fixing members are arranged opposite to each other and enclose a fixing ring (23), and the two fixing members are detachably connected; The inner wall of the fixing ring (23) is provided with a thread, and the fixing ring (23) is sleeved on the cylinder barrel (12) and matched with the external thread on the cylinder barrel (12).

2. The outrigger oil cylinder with mechanical self-locking function according to claim 1, characterized in that: Both ends of the fixing member are connected to connecting plates (24). When the two fixing members are combined to form a fixing ring (23), a bolt (25) is provided on the connecting plate (24) on one of the fixing members. The bolt (25) passes through the connecting plate (24) on the other fixing member and is connected to a nut (26).

3. The outrigger oil cylinder with mechanical self-locking function according to claim 1, characterized in that: A limiting component is arranged between the two fixing members, and the limiting component is used to limit the distance between the two fixing members.

4. The outrigger oil cylinder with mechanical self-locking function according to claim 3, characterized in that: The limiting assembly comprises a first limiting block (27) and a second limiting block (28); the fixing members are respectively a first fixing member (21) and a second fixing member (22); the first limiting block (27) is connected to a connecting plate (24) on the first fixing member (21); the second limiting block (28) is connected to a connecting plate (24) on the second fixing member (22); the first limiting block (27) and the second limiting block (28) cooperate with each other to limit the distance between the two fixing members.

5. The outrigger oil cylinder with mechanical self-locking function according to claim 4, characterized in that: The first limiting block (27) comprises a first mounting plate (271) and a first limiting plate (272); the second limiting block (28) comprises a second mounting plate (281) and a second limiting plate (282); the first mounting plate (271) is connected to a connecting plate (24) on the first fixing member (21); the first limiting plate (272) is connected to a side of the first mounting plate (271) facing the second fixing member (22); a first abutting surface (273) is provided on the first limiting plate (272); the first abutting surface (273) is arranged in a direction away from the second fixing member (22); a second abutting surface (283) is provided on the second limiting plate (282); the second abutting surface (283) is arranged in a direction away from the first fixing member (21); the first abutting surface (273) and the second abutting surface (283) are opposite to each other.

6. The outrigger oil cylinder with mechanical self-locking function according to claim 5, characterized in that: The first limiting plate (272) and the second limiting plate (282) each include two branches, and the two branches are arranged perpendicularly to each other to form an L shape. The branches in the first limiting plate (272) and the second limiting plate (282) that are perpendicular to the plane where the first mounting plate (271) is located are recorded as first branches, and the branches in the first limiting plate (272) and the second limiting plate (282) that are parallel to the plane where the first mounting plate (271) is located are recorded as second branches. The orthographic projections of the two first branches in the plane where the first branches are located overlap, and the orthographic projections of the two second branches in the plane where the second branches are located overlap.

7. The outrigger oil cylinder with mechanical self-locking function according to any one of claims 3 to 6, characterized in that: The limiting components are symmetrically arranged on both sides of the fixing ring (23).

8. The outrigger oil cylinder with mechanical self-locking function according to claim 1, characterized in that: A piston rod (14) is arranged in the protection cylinder (11), and the piston rod (14) is coaxially fixedly arranged in the protection cylinder (11). The piston (16) and the oil cylinder barrel (12) are coaxially sleeved on the piston rod (14), and the piston (16) is arranged between the piston rod (14) and the protection cylinder (11), and the piston (16) is fixedly connected to the piston rod (14).

9. The outrigger oil cylinder with mechanical self-locking function according to claim 8, characterized in that: A guide sleeve (13) is provided between the piston rod (14) and the oil cylinder barrel (12), and the guide sleeve (13) is fixedly connected to the oil cylinder barrel (12).

10. The outrigger oil cylinder with mechanical self-locking function according to claim 9, characterized in that: An oil seat (15) is fixedly arranged at the bottom position in the protective cylinder barrel (11), and an A cavity (151) and a B cavity (152) are arranged on the oil seat (15). The piston rod (14) is hollow and communicates with the B cavity (152). The piston rod (14) is connected to the oil seat (15), and a side hole is arranged on the side wall of the piston rod (14). A first oil cavity (153) is formed between the outer wall of the piston rod (14), the inner wall of the cylinder barrel (12), the guide sleeve (13), and the piston (16), and the side hole communicates the first oil cavity (153) with the internal cavity of the piston rod (14).

11. The outrigger oil cylinder with mechanical self-locking function according to claim 1, characterized in that: One end of the oil cylinder barrel (12) extending outside the protective cylinder barrel (11) is connected to a rod head (17); a second oil chamber (154) is provided between the rod head (17), the piston rod (14), the piston (16), and the oil cylinder barrel (12); an oil pipe (18) is provided inside the piston rod (14); the oil pipe (18) is connected to the A chamber (151) of the oil seat (15) and the second oil chamber (154).

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