A quick connecting and sealing device for hydraulic pipes of excavators

Abstract

This utility model discloses a quick connection and sealing device for excavator hydraulic oil pipes, including a male pipe, a connecting plate fixedly fitted on the surface of the male pipe, and collars movably disposed at both ends on the other side surface of the connecting plate. A limit plate is fixedly disposed on one side of the collar, and a return spring is fixedly disposed on one side of the limit plate. The other end of the return spring is engaged and fixed with the connecting plate. The surface of the male pipe penetrates the connecting plate and is placed between the collars. A female pipe is disposed on one side of the male pipe, and a spherical limit protrusion is fitted on the surface of the female pipe, which engages with the collar. When the tapered tube of the female pipe is inserted into the male pipe, the limit protrusion automatically pushes the collar open using the spherical contour. Under the elastic potential energy of the return spring, the collar can quickly rebound and lock into the groove of the limit protrusion. With the secondary locking mechanism of the support plate and the limit screw, this design simplifies the multi-step alignment and rotation tightening operation required by traditional connection to a single-handed insertion and removal action, reducing the connection time by more than 60%.

Description

Technical Field

[0001] This utility model relates to the technical field of quick connection and sealing devices, and in particular to a quick connection and sealing device for excavator hydraulic oil pipes. Background Technology

[0002] As a core piece of equipment in engineering construction, excavators require frequent disassembly and assembly of hydraulic hoses to cope with different working conditions. Currently, traditional excavator hydraulic hose connection devices have defects such as inconvenient operation, unreliable sealing, and lack of dust protection. Specifically, threaded connections are time-consuming, single seals are prone to failure under vibration, and open interfaces are easily contaminated. The design requirements focus on achieving quick plug-in connections, building a multi-efficient sealing system to cope with complex working conditions, adding dustproof structures, and adopting modular design to facilitate the replacement of key components.

[0003] To address this, we propose a quick-connect and sealing device for excavator hydraulic hoses. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a quick connection and sealing device for excavator hydraulic oil pipes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A quick connection and sealing device for excavator hydraulic oil pipes includes a male pipe, a connecting plate fixedly fitted on the surface of the male pipe, and collars movably disposed at both ends on the other side surface of the connecting plate. A limit plate is fixedly disposed on one side of the collar, and a return spring is fixedly disposed on one side of the limit plate. The other end of the return spring is engaged and fixedly fixed to the connecting plate. The surface of the male pipe penetrates the connecting plate and is placed between the collars. A female pipe is clamped on one side of the male pipe, and a spherical limiting protrusion is fitted on the surface of the female pipe, which engages with the collar.

[0007] As a further embodiment of this utility model: a support plate is engaged on the surface of the female connector, and limit screws are movably arranged on both sides of the support plate, with the other end of the limit screws threadedly connected to the limit plate.

[0008] As a further embodiment of this utility model: a tapered tube is welded to one end of the surface of the female connector, and a sealing ring is fixedly provided around the bottom end of the tapered tube on the surface of the female connector, and the tapered tube is inserted into the male connector and engaged.

[0009] As a further improvement of this utility model: a semi-circular sealing sleeve is fitted on the upper surface of the limiting protrusion, and the sealing sleeve fits against the inner side of the collar.

[0010] As a further improvement of this utility model: the collar is semi-circular in side view, the collars are interlocked and engaged with each other, and a connecting rod is provided through one side of the collar.

[0011] As a further improvement of this utility model: the two ends of the limiting screw are provided with external threads, and one end of the limiting screw is provided with a semi-circular notch.

[0012] As a further improvement of this utility model: the surface of the male connector is provided with external threads, the inner wall of the limiting plate is provided with a limiting spring, and a semi-circular insert is fixedly provided on one side of the limiting spring.

[0013] Compared with the prior art, this utility model provides a quick connection and sealing device for excavator hydraulic oil pipes, which has the following beneficial effects:

[0014] 1. In this utility model, when the tapered tube of the female connector is inserted into the male connector, the limiting protrusion automatically pushes open the collar using its spherical contour. Under the elastic potential energy of the return spring, the collar can quickly rebound and lock into the groove of the limiting protrusion. Combined with the secondary locking mechanism of the support plate and the limiting screw, this design simplifies the multi-step alignment and rotation tightening operation required by traditional connection to a single-handed insertion and removal action, reducing the connection time by more than 60%. The collar adopts a semi-circular nested structure and is hinged by the connecting rod, which can ensure the flexibility of radial opening and closing, and can also achieve circumferential anti-rotation through the limiting spring and the insertion block on the inner wall of the limiting plate, effectively dealing with the connection loosening problem under the high-frequency vibration condition of the excavator.

[0015] 2. In this invention, the tapered tube at the front end of the female connector forms a geometric sealing surface with the inner wall of the male connector. The radial compressive force of the conical surface achieves initial sealing, and the elastic deformation of the bottom annular sealing ring facilitates withstanding greater hydraulic impact. The semi-circular sealing sleeve on the limiting protrusion surface fits tightly against the inner side of the collar, forming a second dustproof sealing barrier. This effectively prevents mud, sand, and dust from the construction environment from entering the connection gap, avoiding the problem of aging and displacement of traditional O-ring single seals under high-pressure pulses.

[0016] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a quick connection and sealing device for hydraulic oil pipes of an excavator proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the support plate structure of a quick connection and sealing device for hydraulic oil pipes in an excavator proposed in this utility model;

[0019] Figure 3This is a schematic diagram of the split structure of the collar of a quick connection and sealing device for hydraulic oil pipes in an excavator, as proposed in this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the limiting plate of a quick connection and sealing device for hydraulic oil pipes of an excavator proposed in this utility model.

[0021] In the diagram: 1. Male connector; 2. Connecting plate; 3. Collar; 4. Limiting plate; 5. Return spring; 6. Female connector; 7. Limiting protrusion; 8. Support plate; 9. Limiting screw; 10. Tapered tube; 11. Sealing ring; 12. Sealing sleeve; 13. Connecting rod; 15. Notch; 16. External thread; 17. Limiting spring; 18. Insert block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Example: A quick-connect and sealing device for hydraulic oil pipes in excavators, such as... Figures 1-4 As shown, the device includes a male connector 1, a connecting plate 2 fixedly fitted onto the surface of the male connector 1, and collars 3 movably disposed at both ends on the other side of the connecting plate 2. A limit plate 4 is fixedly disposed on one side of the collars 3, and a return spring 5 is fixedly disposed on one side of the limit plate 4. The other end of the return spring 5 is engaged and fixed to the connecting plate 2. The surface of the male connector 1 penetrates the connecting plate 2 and is positioned between the collars 3. A female connector 6 is engaged and disposed on one side of the male connector 1. A spherical limiting protrusion 7 is fitted onto the surface of the female connector 6, and the limiting protrusion 7 engages with the collar 3. The surface of the 6 is fitted with a support plate 8, and the two sides of the support plate 8 are movably equipped with limit screws 9. The other end of the limit screws 9 is threadedly connected to the limit plate 4. When the tapered tube 10 of the female connector 6 is inserted into the male connector 1, the limit protrusion 7 automatically pushes open the collar 3 using the spherical contour. Under the action of the elastic potential energy of the return spring 5, the collar 3 can quickly rebound and lock into the groove of the limit protrusion 7. With the secondary locking mechanism of the support plate 8 and the limit screws 9, a three-level connection system is formed, from automatic centering to elastic engagement and then to thread reinforcement.

[0025] like Figures 1-4 As shown, a tapered tube 10 is welded to one end of the surface of the female connector 6. A sealing ring 11 is fixedly installed around the bottom end of the tapered tube 10 on the surface of the female connector 6. The tapered tube 10 is inserted into and engaged with the male connector 1. A semi-circular sealing sleeve 12 is fitted on the upper surface of the limiting protrusion 7. The sealing sleeve 12 fits snugly against the inner side of the collar 3. The tapered tube 10 at the front end of the female connector 6 and the inner wall of the male connector 1 form a geometric sealing surface. The radial compression force of the conical surface is used to achieve initial sealing. Combined with the elastic deformation of the bottom annular sealing ring 11, it can easily withstand more hydraulic impacts. The semi-circular sealing sleeve 12 on the surface of the limiting protrusion 7 fits tightly against the inner side of the collar 3, forming a second dustproof sealing barrier, effectively preventing mud, sand and dust in the construction environment from entering the connection gap.

[0026] like Figures 1-3 As shown, the collar 3 is semi-circular in side view. The collars 3 are interlocked and locked together. A connecting rod 13 is provided through one side of the collar 3. The two ends of the limiting screw 9 are provided with external threads 16. One end of the limiting screw 9 is provided with a semi-circular notch 15. The surface of the male pipe 1 is provided with external threads 16. The inner wall of the limiting plate 4 is provided with a limiting spring 17. A semi-circular insert 18 is fixedly provided on one side of the limiting spring 17.

[0027] Working principle: The tapered tube 10 of the female connector 6 is aligned with the male connector 1 and inserted. The guide slope of the tapered tube 10 automatically aligns the axis of the female connector 6 with the male connector 1. When the limiting protrusion 7 contacts the collar 3, the spherical contour pushes the collar 3 to overcome the tension of the return spring 5 and open to both sides. After the limiting protrusion 7 has completely passed through the collar 3, the return spring 5 pushes the collar 3 to return to its original position. The inner groove of the collar 3 engages with the spherical flange of the limiting protrusion 7, completing the initial mechanical locking. At this time, the sealing ring 11 at the bottom of the tapered tube 10 contacts the inner wall of the male connector 1 to form an initial seal. The limiting screws 9 on both sides of the support plate 8 are rotated so that their external threads 16 engage with the screw holes of the limiting plate 4, pressing the support plate 8 tightly onto the surface of the female connector 6, further shortening the gap of the collar 3 and enhancing the engagement strength of the limiting protrusion 7. Under the pressure of the collar 3, the sealing sleeve 12 is tightly attached to the surface of the limiting protrusion 7, forming a dynamic sealing layer, ultimately achieving rapid connection and high-pressure sealing of the hydraulic oil pipe.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quick connection and sealing device for hydraulic oil pipes of an excavator, comprising a male connecting pipe (1), characterized in that: A connecting plate (2) is fixedly fitted onto the surface of the male connector (1). A collar (3) is movably provided at both ends of the other side surface of the connecting plate (2). A limiting plate (4) is fixedly provided on one side of the collar (3). A return spring (5) is fixedly provided on one side of the limiting plate (4). The other end of the return spring (5) is engaged and fixed with the connecting plate (2). The surface of the male connector (1) passes through the connecting plate (2) and is placed between the collars (3). A female connector (6) is engaged on one side of the male connector (1). A spherical limiting protrusion (7) is fitted onto the surface of the female connector (6). The limiting protrusion (7) is engaged with the collar (3).

2. The quick connection and sealing device for excavator hydraulic oil pipes according to claim 1, characterized in that: The surface of the female connector (6) is fitted with a support plate (8), and the two sides of the support plate (8) are movably provided with limit screws (9), and the other end of the limit screws (9) is threadedly connected to the limit plate (4).

3. The quick connection and sealing device for excavator hydraulic oil pipes according to claim 1, characterized in that: A tapered tube (10) is welded to one end of the surface of the female connector (6), and a sealing ring (11) is fixedly provided around the bottom end of the tapered tube (10) on the surface of the female connector (6). The tapered tube (10) is inserted into the male connector (1) and engaged.

4. The quick connection and sealing device for excavator hydraulic oil pipes according to claim 3, characterized in that: The upper surface of the limiting protrusion (7) is fitted with a semi-circular sealing sleeve (12), and the sealing sleeve (12) is in contact with the inner side of the collar (3).

5. The quick connection and sealing device for excavator hydraulic oil pipes according to claim 4, characterized in that: The collar (3) is semi-circular in side view. The collars (3) are interlocked and locked together. A connecting rod (13) is provided through one side of the collar (3).

6. The quick connection and sealing device for excavator hydraulic oil pipes according to claim 2, characterized in that: The limiting screw (9) has external threads (16) at both ends and a semi-circular notch (15) at one end.

7. A quick-connect and sealing device for excavator hydraulic oil pipes according to claim 6, characterized in that: The male connector (1) has an external thread (16) on its surface, and the inner wall of the limiting plate (4) is provided with a limiting spring (17). A semi-circular insert (18) is fixedly provided on one side of the limiting spring (17).

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