Direction-adjustable joint, hydraulic system and engineering machinery

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a direction-adjustable joint, a hydraulic system and engineering machinery. One end of the elbow joint is inserted into the basic joint; the limiting structure is arranged on the periphery of the elbow joint, and the limiting structure is located outside the basic joint and is opposite to the end part of the basic joint; the sealing structure is arranged between the end part of the basic joint and the limiting structure; and the connecting piece is connected with the basic joint and the elbow joint. One end of the elbow joint is inserted into the basic joint, the elbow joint is adjusted to a proper direction, the limiting structure is arranged on the periphery of the elbow joint, the sealing structure is arranged between the limiting structure and the end of the basic joint, and pressing force is provided for the limiting joint through the connecting piece. End face sealing of the sealing structure between the limiting structure and the basic connector is achieved, and therefore the orientation adjustability of the connector and the reliability of the sealing performance are both considered.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to an adjustable joint, a hydraulic system and engineering machinery. Background Art

[0002] Construction machinery contains numerous oil and water circuits, such as those for post-processing, fuel heating, external water heating, and heaters. Therefore, different water inlets or return ports must be reserved on the engine body for different water-using accessories. When the same engine is used in different vehicle models, the orientation of the connectors may differ due to differences in boundaries and piping. However, while the reserved holes on the engine are the same, connectors must be used to facilitate installation in different orientations while ensuring the sealing performance of the connectors. Utility Model Content

[0003] In view of this, the present invention provides an adjustable joint, a hydraulic system and an engineering machine to solve the problem in the prior art that it is inconvenient to simultaneously take into account the direction adjustment and sealing performance of the joint.

[0004] In the first aspect, the utility model provides an adjustable joint, including: a basic joint; an elbow joint, one end of which is inserted into the interior of the basic joint; a limiting structure, which is arranged on the outer periphery of the elbow joint, and the limiting structure is located outside the basic joint and is arranged opposite to the end of the basic joint; a sealing structure, which is arranged between the end of the basic joint and the limiting structure; and a connecting piece, which connects the basic joint and the elbow joint.

[0005] In an optional embodiment, the limiting structure is circumferentially arranged along the outer circumference of the elbow joint.

[0006] In an optional embodiment, the limiting structure and the elbow joint are integrally formed.

[0007] In an optional embodiment, the connecting piece is sleeved on the outer circumference of the elbow joint and is threadedly connected to the basic joint, and the inner wall of the connecting piece is pressed against the side of the limiting structure away from the sealing structure.

[0008] In an optional embodiment, the outer wall of the basic joint is formed with a first threaded structure and a second threaded structure, the first threaded structure and the second threaded structure are respectively arranged near the two ends of the basic joint, the basic joint is threadedly connected to the connecting member through the first threaded structure, and the basic joint is suitable for being threadedly connected to the reserved installation hole through the second threaded structure.

[0009] In an optional embodiment, the connecting part includes a pressing portion and a connecting portion, the pressing portion is sleeved on the outer circumference of the elbow joint and presses and abuts against the side of the limiting structure away from the sealing structure, the connecting portion is connected to the side of the pressing portion away from the elbow joint, and the connecting portion is arranged around the outer circumference of the base joint and is threadedly connected to the base joint through the first threaded structure.

[0010] In an optional embodiment, the inner wall surface of the basic joint forms a step structure at one end close to the elbow joint, and the step surface of the step structure is arranged opposite to the end of the elbow joint inserted into the basic joint.

[0011] In an optional embodiment, the elbow joint includes a first tube body and a second tube body, the first tube body and the second tube body are connected at a predetermined angle, and the limiting structure is located on the first tube body.

[0012] In a second aspect, the present invention further provides a hydraulic system comprising the above-mentioned adjustable joint.

[0013] In a third aspect, the present invention further provides an engineering machine comprising the above-mentioned hydraulic system.

[0014] The technical solution of this application has the following advantages:

[0015] By connecting the base joint with the reserved installation hole, inserting one end of the elbow joint into the interior of the base joint, and adjusting the elbow joint to an appropriate orientation, a limiting structure is provided on the outer periphery of the elbow joint, and a sealing structure is provided between the limiting structure and the end of the base joint. Pressing force is provided to the limiting joint through the connecting piece to achieve end face sealing of the sealing structure between the limiting structure and the base joint, thereby taking into account both the adjustable orientation of the joint and the reliability of the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a side view of an adjustable joint according to an embodiment of the present utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure in the AA direction;

[0019] Figure 3 for Figure 1 A top view of the adjustable joint is shown.

[0020] Description of reference numerals:

[0021] 1. Basic joint; 11. Large diameter part; 12. Small diameter part; 2. Elbow joint; 21. First tube body; 22. Second tube body; 3. Limiting structure; 4. Sealing structure; 5. Connecting piece; 51. Pressing part; 52. Connecting part; 6. First thread structure; 7. Second thread structure. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0023] The following combination Figures 1 to 3 , describing the embodiments of the present utility model.

[0024] According to an embodiment of the present invention, in one aspect, an adjustable joint is provided, comprising: a base joint 1, an elbow joint 2, a limiting structure 3, a sealing structure 4, and a connector 5. One end of the elbow joint 2 is inserted into the interior of the base joint 1, the limiting structure 3 is disposed on the outer periphery of the elbow joint 2, the limiting structure 3 is located outside the base joint 1 and is disposed opposite to the end of the base joint 1, the sealing structure 4 is disposed between the end of the base joint 1 and the limiting structure 3, and the connector 5 connects the base joint 1 and the elbow joint 2.

[0025] The adjustable joint of this embodiment is used to connect the basic joint 1 with the reserved installation hole, insert one end of the elbow joint 2 into the interior of the basic joint 1, and adjust the elbow joint 2 to an appropriate direction. By setting a limiting structure 3 on the outer periphery of the elbow joint 2 and setting the sealing structure 4 between the limiting structure 3 and the end of the basic joint 1, a pressing force is provided to the limiting joint through the connecting member 5, so as to realize the end face sealing of the sealing structure 4 between the limiting structure 3 and the basic joint 1, thereby taking into account the adjustable direction of the joint and the reliability of the sealing performance.

[0026] It is worth noting that, please refer to Figure 2The lower end of the basic joint 1 is used to connect to the reserved installation hole, and the lower end of the elbow joint 2 is inserted into the interior of the basic joint 1 from the upper end of the basic joint 1. The limiting structure 3 is arranged near the lower end of the elbow joint 2. Because the limiting structure 3 protrudes from the outer wall of the elbow joint 2, the lower end of the elbow joint 2 can be inserted into the interior of the basic joint 1 while the limiting structure 3 is placed outside the basic joint 1. Therefore, a sealing structure 4 can be arranged between the limiting structure 3 and the end of the basic joint 1 to achieve end face sealing.

[0027] Specifically, in one embodiment, the limiting structure 3 is circumferentially arranged along the outer circumference of the elbow joint 2 .

[0028] It should be noted that, in this embodiment, the sealing structure 4 is a sealing gasket, which can be made of polytetrafluoroethylene.

[0029] Of course, in other alternative embodiments, the sealing structure 4 may also be made of other structures or materials, such as an O-ring, a rubber pad, a rubber ring, etc.

[0030] Furthermore, the limiting structure 3 and the elbow joint 2 are integrally formed. Specifically, the elbow base material can be extruded by an extrusion process so that the outer wall of the elbow base material protrudes outward to form the limiting structure 3.

[0031] Of course, in other alternative embodiments, other methods may be used to form the limiting structure 3 on the periphery of the elbow joint 2, such as welding or injection molding.

[0032] In one embodiment, Figure 2 As shown, the connector 5 is sleeved around the outer periphery of the elbow joint 2 and threadedly connected to the base joint 1. The inner wall of the connector 5 presses against the side of the limiting structure 3 away from the sealing structure 4. This arrangement facilitates adjustment of the direction of the elbow joint 2 and maintenance and replacement of the sealing structure 4.

[0033] It is worth noting that, first, the connecting piece 5 is inserted from the lower end of the elbow base material, and then the limiting structure 3 is processed by an extrusion process to complete the processing of the elbow joint 2, and the connecting piece 5 is sleeved on the outside of the elbow joint 2 so that the elbow joint 2 can rotate relative to the connecting piece 5, and the connecting piece 5 can abut against the limiting structure 3 to extrude the sealing structure 4 during the subsequent installation process.

[0034] Please note that Figure 2 The sealing structure 4 is arranged on the lower side of the limiting structure 3 , and accordingly, the inner wall of the connecting member 5 is pressed against the upper side of the limiting structure 3 .

[0035] Specifically, in one embodiment, Figure 2As shown, the outer wall of the basic joint 1 is formed with a first threaded structure 6 and a second threaded structure 7, and the first threaded structure 6 and the second threaded structure 7 are respectively arranged near the two ends of the basic joint 1. The basic joint 1 is threadedly connected to the connecting member 5 through the first threaded structure 6, and the basic joint 1 is suitable for being threadedly connected to the reserved installation hole through the second threaded structure 7.

[0036] Further, such as Figure 2 As shown, the connecting member 5 includes a pressing portion 51 and a connecting portion 52. The pressing portion 51 is sleeved on the outer periphery of the elbow joint 2 and presses and abuts against the side of the limiting structure 3 away from the sealing structure 4. The connecting portion 52 is connected to the side of the pressing portion 51 away from the elbow joint 2. The connecting portion 52 is arranged around the outer periphery of the basic joint 1 and is threadedly connected to the basic joint 1 through the first threaded structure 6.

[0037] It is worth noting that, please refer to Figure 2 The pressing portion 51 is circumferentially arranged to form an annular structure, and the connecting portion 52 is also circumferentially arranged to form a cylindrical structure. The inner wall of the upper end of the connecting portion 52 is connected to the outer ring wall of the pressing portion 51.

[0038] Of course, in other alternative embodiments, the connector 5 may also connect the elbow joint 2 to the base joint 1 in other ways, such as welding, bonding, riveting, clamping, etc.

[0039] In one embodiment, Figure 2 As shown, the inner wall surface of the basic joint 1 forms a step structure at one end close to the elbow joint 2 , and the step surface of the step structure is arranged opposite to the end of the elbow joint 2 inserted into the basic joint 1 .

[0040] It is worth noting that, please refer to Figure 2 The interior of the basic joint 1 is hollowed to form a flow channel, and the side of the basic joint 1 facing the flow channel is the inner wall surface of the basic joint 1. Furthermore, the flow channel includes a large diameter portion 11 and a small diameter portion 12 that are connected to each other. The large diameter portion 11 is located at one end where the basic joint 1 and the elbow joint 2 cooperate, that is, the end of the elbow joint 2 is inserted into the large diameter portion 11. It can be understood that the diameter of the large diameter portion 11 is larger than the diameter of the small diameter portion 12, so that a step structure is formed at the connection between the large diameter portion 11 and the small diameter portion 12. By forming a step structure on the inner wall surface of the basic joint 1, while facilitating the insertion of the elbow joint 2 into the basic joint 1, the insertion position of the elbow joint 2 can be further limited.

[0041] In one embodiment, Figures 1 to 3 As shown, the elbow joint 2 includes a first tube body 21 and a second tube body 22, which are connected at a predetermined angle, and the limiting structure 3 is located on the first tube body 21. Furthermore, in this embodiment, the first tube body 21 and the second tube body 22 are vertically arranged.

[0042] Of course, in other alternative embodiments, the first tube body 21 and the second tube body 22 may also be arranged at other angles according to usage requirements.

[0043] According to an embodiment of the present invention, on the other hand, a hydraulic system is provided, comprising the above-mentioned adjustable joint.

[0044] It is worth noting that the hydraulic system of this embodiment can be a post-processing system, a fuel heating system, an external circulation water heating system, a warm air system, etc.

[0045] According to an embodiment of the present invention, on another aspect, a construction machine is provided, comprising the above-mentioned hydraulic system.

[0046] It is worth noting that the engineering machinery in this embodiment includes operating vehicles such as heavy trucks, trailers, excavators, anchor diggers, bulldozers, road rollers and concrete pump trucks, or mechanical operating equipment such as tower cranes, construction elevators and material hoists.

[0047] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. An adjustable joint, characterized in that: include: Basic joint (1); An elbow joint (2), one end of which is inserted into the interior of the base joint (1); A limiting structure (3) is arranged on the outer periphery of the elbow joint (2), the limiting structure (3) being located outside the basic joint (1) and arranged opposite to the end of the basic joint (1); A sealing structure (4) is provided between the end of the basic joint (1) and the limiting structure (3); A connecting piece (5) connects the basic joint (1) and the elbow joint (2).

2. The adjustable joint according to claim 1, characterized in that: The limiting structure (3) is circumferentially arranged along the outer circumference of the elbow joint (2).

3. The adjustable joint according to claim 2, characterized in that: The limiting structure (3) and the elbow joint (2) are integrally formed.

4. The adjustable joint according to any one of claims 1 to 3, characterized in that: The connecting piece (5) is sleeved on the outer periphery of the elbow joint (2) and is threadedly connected to the base joint (1); the inner wall of the connecting piece (5) is pressed against the side of the limiting structure (3) away from the sealing structure (4).

5. The adjustable joint according to claim 4, characterized in that: The outer wall of the basic joint (1) is formed with a first thread structure (6) and a second thread structure (7), the first thread structure (6) and the second thread structure (7) are respectively arranged near the two ends of the basic joint (1), the basic joint (1) is threadedly connected to the connecting member (5) through the first thread structure (6), and the basic joint (1) is suitable for being threadedly connected to a reserved installation hole through the second thread structure (7).

6. The adjustable joint according to claim 5, characterized in that: The connecting member (5) comprises a pressing portion (51) and a connecting portion (52); the pressing portion (51) is sleeved on the outer periphery of the elbow joint (2) and is pressed against the side of the limiting structure (3) away from the sealing structure (4); the connecting portion (52) is connected to the side of the pressing portion (51) away from the elbow joint (2); the connecting portion (52) is arranged around the outer periphery of the basic joint (1) and is threadedly connected to the basic joint (1) through the first threaded structure (6).

7. The adjustable joint according to any one of claims 1 to 3, characterized in that: The inner wall surface of the basic joint (1) forms a step structure at one end close to the elbow joint (2), and the step surface of the step structure is arranged opposite to the end of the elbow joint (2) inserted into the basic joint (1).

8. The adjustable joint according to any one of claims 1 to 3, characterized in that: The elbow joint (2) comprises a first tube body (21) and a second tube body (22); the first tube body (21) and the second tube body (22) are connected at a predetermined angle; and the limiting structure (3) is located on the first tube body (21).

9. A hydraulic system, characterized in that: The adjustable joint comprises the adjustable joint according to any one of claims 1 to 8.

10. An engineering machine, characterized in that: Includes the hydraulic system according to claim 9.

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