Anti-drop hydraulic joint

Abstract

The utility model relates to the technical field of hydraulic joints, in particular to an anti-falling type hydraulic joint. According to the technical scheme, the device comprises a connecting pipe, a fixing pipe and a hydraulic hose, one end of the connecting pipe is connected with a first conical pipe, the tail end of the first conical pipe is connected with a second conical pipe, the first conical pipe and the second conical pipe are both located in the hydraulic hose, and a plurality of annular grooves are formed in the outer surface of the second conical pipe at equal intervals; external threads are arranged on the side, close to the first conical pipe, of the outer surface of the connecting pipe, the hydraulic hose penetrates through the fixing pipe, internal threads, a first conical inclined face and a second conical inclined face are sequentially arranged on the inner wall of the fixing pipe, and a plurality of annular protrusions are arranged on the inner wall of the second conical inclined face at equal intervals. According to the utility model, the firmness and the sealing performance of the connection between the hydraulic hose and the hydraulic joint are improved, the hydraulic hose is prevented from loosening and falling off from the hydraulic joint due to stress in the long-term use process, and the stable operation of hydraulic work is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic joint technical field, concretely is a kind of anti-drop hydraulic joint. BACKGROUND

[0002] Hydraulic joint is the element playing the role of connection, sealing and shock absorption in hydraulic system, mainly used to connect different hydraulic components (such as pump, delivery pipeline, reversing valve, stop valve, hydraulic motor, hydraulic cylinder etc.), form a closed loop, and prevent high-pressure medium and low-pressure medium from mutual leakage or channeling through sealing design, ensure the stability and reliability of system pressure, and hydraulic joint is widely used in various hydraulic systems, especially in engineering machinery such as concrete delivery pump, excavator, loader and other equipment.

[0003] At present, hydraulic joint is prone to looseness between hydraulic joint and hydraulic hose during long-term use due to the influence of pulling and vibration force between hydraulic joint and hydraulic hose, which leads to the falling of hydraulic hose, causes hydraulic oil leakage, and affects normal hydraulic work, therefore, we propose a kind of anti-drop hydraulic joint. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of anti-drop hydraulic joint, with the advantages of improving the firmness and sealing property of the connection between hydraulic hose and hydraulic joint, preventing the looseness and falling between hydraulic hose and hydraulic joint due to stress during long-term use, and ensuring the stable operation of hydraulic work, solve the problem that the current hydraulic joint is prone to looseness between hydraulic joint and hydraulic hose during long-term use due to the influence of pulling and vibration force between hydraulic joint and hydraulic hose, which leads to the falling of hydraulic hose, causes hydraulic oil leakage, and affects normal hydraulic work.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of anti-drop hydraulic joint, including connecting pipe, fixed pipe and hydraulic hose, the one end of the connecting pipe is connected with first conical pipe, the second conical pipe is connected at the end of the first conical pipe, and the first conical pipe and the second conical pipe are located inside the hydraulic hose, a plurality of annular grooves are equidistantly arranged on the outer surface of the second conical pipe, the outer surface of the connecting pipe is provided with external thread on the side close to the first conical pipe, the hydraulic hose passes through the fixed pipe, the inner wall of the fixed pipe is sequentially provided with internal thread, first conical inclined surface and second conical inclined surface, a plurality of annular protrusions are equidistantly arranged on the inner wall of the second conical inclined surface.

[0006] Preferably, the outer surface of the connecting pipe is provided with first hexagonal ring, the outer surface of the fixed pipe is provided with second hexagonal ring, and the first hexagonal ring and the second hexagonal ring cooperate with wrench to rotate the fixed pipe and the connecting pipe.

[0007] Preferably, the outer surface of the connecting pipe is located between the first hexagonal ring and the second hexagonal ring and is provided with a limiting ring, and the outer surface of the limiting ring is provided with a plurality of bending teeth equidistantly arranged in a ring array, the outer surface of the fixing pipe is provided with a plurality of limiting grooves equidistantly arranged in a ring array near the limiting ring, and the bending teeth are inserted into the limiting grooves after being bent to limit the rotation between the fixing pipe and the connecting pipe, thereby preventing the fixing pipe from loosening.

[0008] Preferably, the outer surface of the limiting ring is provided with a lubricating coating near the fixing pipe, so as to reduce the friction between the fixing pipe and the limiting ring during the rotation of the fixing pipe, thereby facilitating the rotation of the fixing pipe.

[0009] Preferably, the inner wall of the connecting pipe is provided with a connecting thread away from the first conical pipe.

[0010] Preferably, the inclination angle of the outer surface of the first conical pipe is equal to the inclination angle of the first conical slope, and the inclination angle of the outer surface of the second conical pipe is equal to the inclination angle of the second conical slope, so that the hydraulic hose is clamped between the first conical pipe and the first conical slope and between the second conical pipe and the second conical slope.

[0011] Preferably, the inclination angle a between the outer surface of the first conical pipe and the axis is greater than the inclination angle b between the outer surface of the second conical pipe and the axis, so that the pipe opening of the hydraulic hose is expanded at the first conical pipe and clamped and fixed by the first conical pipe and the first conical slope, thereby further improving the firmness of the hydraulic hose connection.

[0012] Compared with the prior art, the utility model has the advantages of the following:

[0013] 1、The utility model discloses a connecting pipe, a fixing pipe, a first conical pipe, a second conical pipe, a ring groove, a first conical slope, a second conical slope, a ring protrusion, an internal thread and an external thread are arranged, the firmness and the sealing property of the hydraulic hose and the hydraulic connector are improved, the loosening and the falling off between the hydraulic hose and the hydraulic connector are prevented during long -term use, the stable operation of the hydraulic work is ensured, the hydraulic hose passes through the inside of the fixing pipe, then the first conical pipe and the second conical pipe are inserted into the inside of the hydraulic hose, after the fixing pipe is screwed, the fixing pipe and the connecting pipe are fixed together through the internal thread and the external thread, when the fixing pipe is screwed, the ring protrusion on the second conical slope extrudes the hydraulic hose, the hydraulic hose is deformed and enters the ring groove of the outer surface of the second conical pipe, the hydraulic hose is fixedly connected with the second conical pipe, the sealing property is ensured, the pipe opening of the hydraulic hose is expanded and clamped and fixed by the first conical slope and the first conical pipe, and the firmness of the hydraulic hose connection is further improved.

[0014] 2、The utility model discloses a limiting recess, limiting ring and bending tooth are set up, reached the effect that can avoid fixed pipe loosening, fixed pipe and connecting pipe are fixed after through internal thread and external thread, and bending tooth is inserted into the inside of limiting recess after bending, to limit the rotation between fixed pipe and connecting pipe, thereby prevent fixed pipe loosening.

[0015] 3、The utility model discloses a lubricating coating is set up, when screwing fixed pipe, reduce the friction between fixed pipe and limiting ring, to facilitate the rotation of fixed pipe. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is the three-dimensional structure schematic diagram of the utility model connecting pipe local part;

[0018] Figure 3 It is the three-dimensional structure schematic diagram of the utility model fixed pipe local part;

[0019] Figure 4 It is the main cross section structure schematic diagram of the utility model.

[0020] Figure legend: 1, connecting pipe;2, fixed pipe;3, hydraulic hose;4, lubricating coating;5, bending tooth;6, limiting ring;7, first hexagonal ring;8, external thread;9, first conical pipe;10, annular recess;11, second conical pipe;12, internal thread;13, limiting recess;14, first conical slope;15, second conical slope;16, annular protrusion;17, second hexagonal ring. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model will be further explained below in combination with the drawings and specific embodiments. Embodiment one

[0022] As Figures 1-4As shown, the utility model provides a kind of anti-drop hydraulic connector, including connecting pipe 1, fixed pipe 2 and hydraulic hose 3, connecting pipe 1 one end is connected with first conical tube 9, first conical tube 9 end is connected with second conical tube 11, and first conical tube 9 and second conical tube 11 are all located inside hydraulic hose 3, and a plurality of annular grooves 10 are equidistantly arranged on the outer surface of second conical tube 11, the inner wall of connecting pipe 1 is provided with connecting thread on the side away from first conical tube 9, the outer surface of connecting pipe 1 is provided with external thread 8 on the side close to first conical tube 9, hydraulic hose 3 passes through fixed pipe 2, the inner wall of fixed pipe 2 is sequentially provided with internal thread 12, first conical inclined plane 14 and second conical inclined plane 15, a plurality of annular protrusions 16 are equidistantly arranged on the inner wall of second conical inclined plane 15, the inclination angle of the outer surface of first conical tube 9 is equal to the inclination angle of first conical inclined plane 14, the inclination angle of the outer surface of second conical tube 11 is equal to the inclination angle of second conical inclined plane 15, so that hydraulic hose 3 is fixed and clamped between first conical tube 9 and first conical inclined plane 14 and between second conical tube 11 and second conical inclined plane 15, the inclination angle a between the outer surface of first conical tube 9 and axis is greater than the angle b between the outer surface of second conical tube 11 and axis, the outer surface of limiting ring 6 is provided with lubricating coating 4 on the side close to fixed pipe 2, when fixed pipe 2 is screwed, the friction between fixed pipe 2 and limiting ring 6 is reduced, to facilitate the rotation of fixed pipe 2, the outer surface of connecting pipe 1 is provided with first hexagonal ring 7, first hexagonal ring 7 is integrally processed with connecting pipe 1, the outer surface of fixed pipe 2 is provided with second hexagonal ring 17, second hexagonal ring 17 is integrally processed with fixed pipe 2, first hexagonal ring 7 and second hexagonal ring 17 cooperate to screw fixed pipe 2 and connecting pipe 1.

[0023] The utility model in usage, hydraulic hose 3 passes through from inside fixed pipe 2, then first conical tube 9 and second conical tube 11 are inserted to inside hydraulic hose 3, after screwing fixed pipe 2, make fixed pipe 2 and connecting pipe 1 be fixed together through internal thread 12 and external thread 8, and when fixed pipe 2 is screwed, annular protrusion 16 on second conical inclined plane 15 extrude hydraulic hose 3, make hydraulic hose 3 deform and enter inside annular groove 10 of the outer surface of second conical tube 11, so that hydraulic hose 3 is firmly and second conical tube 11 fixed connection, simultaneously ensure the leakproofness, and first conical inclined plane 14 and first conical tube 9 make the pipe orifice of hydraulic hose 3 expand and be clamped and fixed, further improve the firmness of hydraulic hose 3 connection. Example two

[0024] As Figures 1-4As shown, the utility model provides a kind of anti-drop hydraulic connector, compared with embodiment one, this embodiment still includes the limit ring 6 being arranged between the outer surface of connecting pipe 1 located in first six edge ring 7 and second six edge ring 17, and the outer surface of limit ring 6 is annular array equidistant and provided with several bending teeth 5, the outer surface of fixed pipe 2 is equidistant and provided with several limit recesses 13 in annular array at the position close to limit ring 6.

[0025] In the embodiment, after fixed pipe 2 and connecting pipe 1 are fixed by internal thread 12 and external thread 8, bending tooth 5 is inserted into limit recess 13 after bending, to limit the rotation between fixed pipe 2 and connecting pipe 1, so as to prevent the loosening of fixed pipe 2.

[0026] The above specific embodiments are only several preferred embodiments of the utility model, based on the technical scheme of the utility model and the related inspiration of the above embodiments, the above specific embodiments can be made by the person skilled in the art Multiple alternative improvements and combinations.

Claims

1. A pull-off-proof hydraulic joint comprising a connecting pipe (1), a fixing pipe (2) and a hydraulic hose (3), characterized in that: The connecting pipe (1) is connected with a first taper pipe (9) at one end, the first taper pipe (9) is connected with a second taper pipe (11) at the end, and the first taper pipe (9) and the second taper pipe (11) are located inside the hydraulic hose (3), a plurality of annular grooves (10) are equidistantly arranged on the outer surface of the second taper pipe (11), an external thread (8) is arranged on the side of the outer surface of the connecting pipe (1) close to the first taper pipe (9), the hydraulic hose (3) passes through the fixed pipe (2), an internal thread (12), a first taper inclined surface (14) and a second taper inclined surface (15) are arranged in sequence on the inner wall of the fixed pipe (2), and a plurality of annular protrusions (16) are equidistantly arranged on the inner wall of the second taper inclined surface (15).

2. A pull-proof hydraulic fitting according to claim 1, characterized in that: The outer surface of the connecting pipe (1) is provided with a first hexagonal ring (7), and the outer surface of the fixed pipe (2) is provided with a second hexagonal ring (17).

3. A pull proof hydraulic fitting according to claim 2, characterized in that: The outer surface of the connecting pipe (1) is provided with a first hexagonal ring (7), and the outer surface of the fixed pipe (2) is provided with a second hexagonal ring (17).

4. A pull proof hydraulic fitting according to claim 3, characterized in that: The outer surface of the connecting pipe (1) is provided with a first hexagonal ring (7), and the outer surface of the fixed pipe (2) is provided with a second hexagonal ring (17).

5. The anti-pullout hydraulic fitting of claim 1, wherein: The outer surface of the connecting pipe (1) is provided with a first hexagonal ring (7), and the outer surface of the fixed pipe (2) is provided with a second hexagonal ring (17).

6. A pull-proof hydraulic fitting according to claim 1, characterized in that: The outer surface of the connecting pipe (1) is provided with a first hexagonal ring (7), and the outer surface of the fixed pipe (2) is provided with a second hexagonal ring (17).

7. A pull proof hydraulic fitting according to claim 6, characterized in that: The outer surface of the connecting pipe (1) is provided with a first hexagonal ring (7), and the outer surface of the fixed pipe (2) is provided with a second hexagonal ring (17). The outer surface of the connecting pipe (1) is provided with a first hexagonal ring (7), and the outer surface of the fixed pipe (2) is provided with a second hexagonal ring (17).

Images