Variable-diameter hollow hydraulic jack

Abstract

The utility model discloses a variable-diameter hollow hydraulic jack, which belongs to the technical field of hydraulic jacks and comprises a base, the top of the base is fixedly connected with a first cylinder and a box body, the top of the box body is fixedly connected with a second cylinder, and a small piston arranged in the second cylinder is rotatably connected with a pressing rod. The pressing rod is rotationally connected with the top of the box body, the box body is connected with the first column body through a flow guide pipe, the outer surface of the first column body is movably connected with a release valve, the outer surface of the first column body is fixedly connected with an oil inlet, and whether a second connecting pipeline is installed or not can be selectively selected according to the diameter of the piston rod; therefore, the hydraulic jack can be adjusted according to the size of the piston rod so as to adapt to working objects of different sizes and shapes, meanwhile, the original high efficiency, stability and safety performance are kept, the limitation of a traditional hydraulic jack in the jacking diameter aspect is overcome, and the adaptability and flexibility of the hydraulic jack in different working environments are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic jacks, and more specifically to a hollow hydraulic jack with a variable diameter. Background Art

[0002] Hydraulic jack, also known as oil hydraulic jack, is a jack that uses a plunger or hydraulic cylinder as a rigid lifting member. It has the characteristics of compact structure, stable operation, strong lifting force, and self-locking. Hydraulic jacks have strong lifting capacity, especially heavy-duty hydraulic jacks, whose lifting force can even exceed 100 tons. Hydraulic jacks are widely used in many occasions, such as power maintenance, bridge maintenance, heavy lifting, static pile pressure, foundation settlement, bridge and ship repair, etc., especially in highway and railway construction, machinery adjustment, equipment disassembly, etc.

[0003] In the field of engineering technology, hydraulic jacks, as an important lifting equipment, are widely used in various industrial occasions, such as bridge construction, machinery manufacturing, power maintenance and other fields. Traditional hydraulic jacks usually have a fixed lifting diameter, which to a certain extent limits their application in different working environments and scenarios. For example, in the process of bridge maintenance, it may be necessary to adapt to piers or supporting structures of different diameters; in the field of machinery manufacturing, for workpieces of different specifications and sizes, jacks that can flexibly adjust the lifting diameter are needed to adapt.

[0004] Therefore, in order to overcome the limitations of traditional hydraulic jacks in terms of lifting diameter and improve their adaptability and flexibility in different working environments, it has become an urgent need to develop a variable diameter hollow hydraulic jack. This new type of jack needs to be able to adjust its lifting diameter within a certain range to adapt to work objects of different sizes and shapes while maintaining the original high efficiency, stability and safety performance. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a hollow hydraulic jack with a variable diameter, which solves the above-mentioned problems.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a variable diameter hollow hydraulic jack, comprising a base, a first column fixedly connected to the top of the base, a box fixedly connected to the top of the base, a second column fixedly connected to the top of the box, a small piston arranged inside the second column is rotatably connected to a pressure rod, the pressure rod is rotatably connected to the top of the box, the box and the first column are connected through a guide pipe, a release valve is movably connected to the outer surface of the first column, an oil inlet is fixedly connected to the outer surface of the first column, characterized in that a first connecting pipe is fixedly connected to the top of the first connecting pipe, a second connecting pipe is arranged inside the first connecting pipe, a third connecting pipe is arranged inside the second connecting pipe, a piston rod is movably connected to the inside of the third connecting pipe, and further comprising:

[0009] A first connecting assembly, which is located on the outer surfaces of the second connecting pipe and the third connecting pipe, and is used to connect the first connecting pipe with the second connecting pipe and the second connecting pipe with the third connecting pipe;

[0010] The second connecting assembly is located inside the first connecting pipe and the second connecting pipe, and is used to connect the first connecting pipe with the second connecting pipe and the second connecting pipe with the third connecting pipe.

[0011] Preferably, the first connecting assembly includes a connecting frame and a connecting column, and the outer surface of the second connecting pipe is fixedly connected to two connecting frames symmetrically distributed, and the bottoms of the two connecting frames are fixedly connected to connecting columns.

[0012] Preferably, the outer surfaces of the two connecting frames are provided with through holes, the interiors of the two through holes are fixedly connected with telescopic springs, and the other ends of the two telescopic springs are fixedly connected with connecting balls.

[0013] Preferably, the second connecting component comprises a connecting groove and a first connecting hole, the inner wall of the first connecting pipe is provided with two symmetrically distributed connecting grooves, and the first connecting hole is provided inside the two connecting grooves.

[0014] Preferably, the connecting groove is movably connected to the corresponding connecting frame, and the connecting ball is movably engaged with the corresponding first connecting hole.

[0015] Preferably, two symmetrically distributed second connection holes are provided on the bottom inner wall of the first connection pipe below the connection groove, and the connection column is movably plugged into the corresponding second connection holes.

[0016] Preferably, the interior of the first connecting pipe is movably engaged with the outer surface of the second connecting pipe, and the interior of the second connecting pipe is movably engaged with the outer surface of the third connecting pipe.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a variable diameter hollow hydraulic jack, which has the following beneficial effects:

[0019] 1. The variable diameter hollow hydraulic jack connects the first connecting pipe with the second connecting pipe through the cooperation of the first connecting component and the second connecting component. Whether to install the second connecting pipe can be selectively selected according to the diameter of the piston rod, so that it can be adjusted according to the size of the piston rod to adapt to work objects of different sizes and shapes, while maintaining the original high efficiency, stability and safety performance.

[0020] 2. This variable diameter hollow hydraulic jack overcomes the limitations of traditional hydraulic jacks in terms of lifting diameter and improves its adaptability and flexibility in different working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the connection state of the connecting pipeline of the utility model;

[0023] Figure 3 This is a schematic diagram of the first connecting pipeline structure of the utility model;

[0024] Figure 4 This is a schematic diagram of the second connecting pipeline structure of the utility model;

[0025] Figure 5 This is a side view of the second connecting pipeline structure of the utility model;

[0026] Figure 6 This is a schematic diagram of the internal structure of the first connecting pipeline of the utility model.

[0027] In the figure: 1. base; 2. first column; 3. second column; 4. pressure rod; 5. oil inlet; 6. release valve; 7. first connecting pipe; 8. second connecting pipe; 9. third connecting pipe; 10. piston rod; 11. connecting frame; 12. connecting groove; 13. connecting column; 14. through hole; 15. telescopic spring; 16. connecting ball; 17. first connecting hole; 18. second connecting hole. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-6 , the utility model provides a technical solution:

[0030] A variable diameter hollow hydraulic jack comprises a base 1, a first column 2 is fixedly connected to the top of the base 1, a box is fixedly connected to the top of the base 1, a second column 3 is fixedly connected to the top of the box, a small piston arranged inside the second column 3 is rotatably connected to a pressure rod 4, the pressure rod 4 is rotatably connected to the top of the box, the box and the first column 2 are connected through a guide pipe, a release valve 6 is movably connected to the outer surface of the first column 2, an oil inlet 5 is fixedly connected to the outer surface of the first column 2, characterized in that a first connecting pipe 7 is fixedly connected to the top of the first connecting pipe 7, a second connecting pipe 8 is arranged inside the first connecting pipe 7, a third connecting pipe 9 is arranged inside the second connecting pipe 8, a piston rod 10 is movably connected to the inside of the third connecting pipe 9, and further comprises:

[0031] A first connecting assembly, which is located on the outer surfaces of the second connecting pipe 8 and the third connecting pipe 9, and is used to connect the first connecting pipe 7 with the second connecting pipe 8 and the second connecting pipe 8 with the third connecting pipe 9;

[0032] The second connecting component is located inside the first connecting pipe 7 and the second connecting pipe 8, and is used to connect the first connecting pipe 7 with the second connecting pipe 8 and the second connecting pipe 8 with the third connecting pipe 9, and pour the hydraulic oil into the oil inlet 5. By reciprocating the pressure rod 4, the pressure rod 4 lifts the small piston in the second column 3 reciprocatingly, and under the quota and pressure of the guide pipe, the oil pump continuously presses oil into the first column 2, causing the oil pressure in the oil cylinder to continue to increase, thereby forcing the piston rod 10 and the weight on the piston rod 10 to move upward together, realizing the lifting function. When the weight needs to be lowered, the release valve 6 is opened, and the high-pressure oil in the oil cylinder flows back to the oil storage chamber, and the weight and the piston rod 10 fall together.

[0033] Furthermore, the first connecting component includes a connecting frame 11 and a connecting column 13. The outer surface of the second connecting pipe 8 is fixedly connected to two connecting frames 11 that are symmetrically distributed. The bottoms of the two connecting frames 11 are fixedly connected to connecting columns 13, and the connecting columns 13 are inserted into the second connecting holes 18.

[0034] Furthermore, through holes 14 are provided on the outer surfaces of the two connecting frames 11, and telescopic springs 15 are fixedly connected to the inside of the two through holes 14. The other ends of the two telescopic springs 15 are fixedly connected to connecting balls 16. When the connecting frames 11 slide in the connecting grooves 12, the inner wall of the first connecting pipe 7 squeezes the connecting balls 16 so that the connecting balls 16 are located in the through holes 14.

[0035] Furthermore, the second connecting component includes a connecting groove 12 and a first connecting hole 17. The inner wall of the first connecting pipe 7 is provided with two symmetrically distributed connecting grooves 12. The interiors of the two connecting grooves 12 are both provided with a first connecting hole 17. When the connecting ball 16 moves to the position of the first connecting hole 17.

[0036] Furthermore, the connecting groove 12 is movably connected to the corresponding connecting frame 11 , the connecting ball 16 is movably engaged with the corresponding first connecting hole 17 , and the telescopic spring 15 is stretched to bring the connecting ball 16 out and into the first connecting hole 17 .

[0037] Furthermore, two symmetrically distributed second connection holes 18 are provided on the bottom inner wall of the first connection pipe 7 below the connection groove 12 , and the connection column 13 is movably plugged into the corresponding second connection holes 18 .

[0038] Furthermore, the interior of the first connecting pipe 7 is movably connected to the outer surface of the second connecting pipe 8, and the interior of the second connecting pipe 8 is movably connected to the outer surface of the third connecting pipe 9. Whether to install the third connecting pipe 9 can be selectively selected according to the diameter of the piston rod 10.

[0039] Working principle: When the staff needs to use the variable diameter hollow hydraulic jack, they can selectively select the number of the first connecting pipe 7, the second connecting pipe 8 and the third connecting pipe 9, and insert the connecting frames 11 on both sides of the second connecting pipe 8 into the connecting grooves 12 opened on the inner wall of the first connecting pipe 7. During the sliding of the connecting frame 11 in the connecting grooves 12, the inner wall of the first connecting pipe 7 squeezes the connecting ball 16 so that the connecting ball 16 is located in the through hole 14. When the connecting ball 16 moves to the position of the first connecting hole 17, the telescopic spring 15 stretches to bring the connecting ball 16 out and into the first connecting hole 17. At the same time, the connecting column 13 is inserted into the second connecting hole 18, so that the first connecting pipe 7 is connected to the connecting hole 18. A connecting pipe 7 is connected to a second connecting pipe 8. The third connecting pipe 9 can be selectively installed according to the diameter of the piston rod 10. After the diameter of the piston rod 10 is adjusted, the hydraulic oil is poured into the oil inlet 5. By reciprocating the pressure rod 4, the pressure rod 4 lifts the small piston in the second column 3 back and forth. Under the quota and pressure of the guide pipe, the oil pump continuously presses oil into the first column 2, causing the oil pressure in the oil cylinder to continue to increase, thereby forcing the piston rod 10 and the weight on the piston rod 10 to move upward together to realize the lifting function. When the weight needs to be lowered, the release valve 6 is opened, and the high-pressure oil in the oil cylinder flows back to the oil storage chamber, and the weight and the piston rod 10 fall together.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A variable diameter hollow hydraulic jack, comprising a base (1), the top of the base (1) is fixedly connected to a first column (2), the top of the base (1) is fixedly connected to a box, the top of the box is fixedly connected to a second column (3), a small piston arranged inside the second column (3) is rotatably connected to a pressure rod (4), the pressure rod (4) is rotatably connected to the top of the box, the box and the first column (2) are connected via a guide tube, the outer surface of the first column (2) is movably connected to a release valve (6), the outer surface of the first column (2) is fixedly connected to an oil inlet (5), characterized in that: The top of the first column (2) is fixedly connected to a first connecting pipe (7), a second connecting pipe (8) is provided inside the first connecting pipe (7), a third connecting pipe (9) is provided inside the second connecting pipe (8), and a piston rod (10) is movably connected inside the third connecting pipe (9), and further comprises: A first connecting assembly, which is located on the outer surfaces of the second connecting pipe (8) and the third connecting pipe (9), and is used to connect the first connecting pipe (7) and the second connecting pipe (8), and the second connecting pipe (8) and the third connecting pipe (9); The second connecting assembly is located inside the first connecting pipe (7) and the second connecting pipe (8) and is used to connect the first connecting pipe (7) and the second connecting pipe (8) and the second connecting pipe (8) and the third connecting pipe (9).

2. A variable diameter hollow hydraulic jack according to claim 1, characterized in that: The first connection assembly comprises a connection frame (11) and a connection column (13); the outer surface of the second connection pipe (8) is fixedly connected to two connection frames (11) which are symmetrically distributed; the bottoms of the two connection frames (11) are fixedly connected to the connection columns (13).

3. A variable diameter hollow hydraulic jack according to claim 2, characterized in that: The outer surfaces of the two connecting frames (11) are each provided with a through hole (14), the interiors of the two through holes (14) are each fixedly connected with a telescopic spring (15), and the other ends of the two telescopic springs (15) are each fixedly connected with a connecting ball (16).

4. A variable diameter hollow hydraulic jack according to claim 3, characterized in that: The second connection assembly comprises a connection groove (12) and a first connection hole (17); the inner wall of the first connection pipe (7) is provided with two symmetrically distributed connection grooves (12); and the first connection hole (17) is provided inside the two connection grooves (12).

5. The variable diameter hollow hydraulic jack according to claim 4, characterized in that: The connection groove (12) is movably connected to the corresponding connection frame (11), and the connection ball (16) is movably engaged with the corresponding first connection hole (17).

6. A variable diameter hollow hydraulic jack according to claim 5, characterized in that: The bottom inner wall of the first connecting pipe (7) is provided with two symmetrically distributed second connecting holes (18) below the connecting groove (12), and the connecting column (13) is movably plugged into the corresponding second connecting holes (18).

7. The variable diameter hollow hydraulic jack according to claim 1, characterized in that: The interior of the first connecting pipe (7) is movably connected to the outer surface of the second connecting pipe (8), and the interior of the second connecting pipe (8) is movably connected to the outer surface of the third connecting pipe (9).

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