Adjustable movable arm oil cylinder pipeline arrangement structure and excavator thereof

Abstract

The utility model discloses an adjustable boom oil cylinder pipeline arrangement structure and an excavator thereof, and belongs to the technical field of engineering machinery. The defects that in the prior art, a traditional adjustable boom oil cylinder pipeline arrangement is complex and too long, and too many moving rubber pipes exist are overcome. The main structure of the explosion-proof valve comprises a main pipeline assembly and an explosion-proof valve pilot pipeline assembly, the main pipeline assembly comprises a first steel pipe, a second steel pipe, a third steel pipe, a third rubber pipe and a fourth rubber pipe, one end of the second steel pipe is connected with a large cavity of an adjustable boom oil cylinder, and the other end of the second steel pipe is communicated with the left side of the third steel pipe through the first rubber pipe; the other end is communicated with the left end part of the steel pipe III; one end of the first steel pipe is connected with a small cavity of the adjustable boom oil cylinder, the other end of the first steel pipe is communicated with the right side of the third steel pipe through the second rubber pipe, and one end of the third rubber pipe is installed on the right side of the excavator upper frame and the other end of the third rubber pipe is communicated with the right end of the third steel pipe. The utility model is mainly applied to engineering machinery such as excavators and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to an adjustable boom oil cylinder pipeline arrangement structure and an excavator thereof. Background Art

[0002] Three-section boom excavators generally have a boom and an adjustable boom, which are driven by a boom cylinder and an adjustable boom cylinder respectively. For medium-sized and larger excavators, there are generally two boom cylinders, which are symmetrically distributed relative to the boom. At this time, the adjustable boom cylinder is located between the two boom cylinders and crosses with the boom cylinder. Due to the associated movement of the adjustable boom cylinder and the boom cylinder, the crossing state of the three cylinders is different in different postures, so the layout of the adjustable boom cylinder pipeline becomes a difficult point. The existing technical solutions have problems such as complex pipeline layout, too long pipelines, too many moving hoses, and unnatural hose bending in various postures.

[0003] like Fig.10 The figure shows the existing pipeline arrangement of the adjustable boom oil cylinder. In order to avoid interference with the boom oil cylinder, such as pipeline A, the pipeline of the adjustable boom oil cylinder is first fixed on the side of the adjustable boom, and then the pipeline is led to the adjustable boom. The piston rod of the adjustable boom oil cylinder is connected to the adjustable boom through hinge 1. The adjustable boom oil cylinder moves within the travel range, driving the adjustable boom to move around hinge 2. The distance between the adjustable boom oil cylinder port and the adjustable boom changes. Therefore, there is a hose section in pipeline A, and a hose is used in pipeline B to connect the boom and the pipeline fixing points on the adjustable boom. Pipeline C is fixed on the boom. Since the boom and the upper frame are connected by three hinges, pipeline D uses a hose to connect the boom and the pipeline fixing points of the upper frame. The entire pipeline requires at least 3 sections of movable hoses. Therefore, the above existing solutions have the following disadvantages: 1. The pipeline first detours around the adjustable boom, the pipeline is long, the pressure loss is large, and the cost is high; 2. There are too many moving hoses in the pipeline, and the appearance is complicated. The pipeline is arranged above the boom, which affects the overall arrangement of other pipelines of the working device and there is a risk of interference with other pipelines; 3. The aesthetics are not good enough. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an adjustable boom oil cylinder pipeline arrangement structure and an excavator thereof.

[0005] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0006] A pipeline arrangement structure of an adjustable boom cylinder comprises a main pipeline assembly and an explosion-proof valve pilot pipeline assembly, wherein the main pipeline assembly comprises steel pipe 1, steel pipe 2, steel pipe 3, rubber pipe 3 and rubber pipe 4, wherein one end of steel pipe 2 is connected to a large cavity of the adjustable boom cylinder, the other end of steel pipe 2 is connected to the left side of steel pipe 3 through rubber pipe 1, one end of rubber pipe 4 is installed on the left side of an excavator frame, and the other end of rubber pipe 4 is connected to the left end of steel pipe 3; one end of steel pipe 1 is connected to a small cavity of the adjustable boom cylinder, the other end of steel pipe 1 is connected to the right side of steel pipe 3 through rubber pipe 2, one end of rubber pipe 3 is installed on the right side of an excavator frame, and the other end of rubber pipe 3 is connected to the right end of steel pipe 3.

[0007] Preferably, the steel pipe three includes a welding head A, a steel pipe assembly one, a welding head C, a blind pipe, a welding head D, a steel pipe assembly two and a welding head B. The welding head A is connected to the welding head C through the steel pipe assembly one, the welding head B is connected to the welding head D through the steel pipe assembly two, the blind pipe is arranged between the welding head C and the welding head D, and there is no conduction in the middle of the blind pipe.

[0008] Preferably, the welding head A is connected to the rubber hose 4, the welding head C is connected to the rubber hose 1, and the rubber hose 4, the left part of the steel pipe 3, the rubber hose 1 and the steel pipe 2 constitute the large-cavity pipeline of the adjustable arm cylinder; the welding head B is connected to the rubber hose 3, the welding head D is connected to the rubber hose 2, and the rubber hose 3, the right part of the steel pipe 3, the rubber hose 2 and the steel pipe 1 constitute the small-cavity pipeline of the adjustable arm cylinder.

[0009] Preferably, the explosion-proof valve pilot line assembly includes hose five, hose six, hose seven, hose eight, a bracket and an oil circuit block installed on the bracket, one end of hose eight is connected to the pilot oil inlet of the adjustable boom cylinder explosion-proof valve, and the other end is connected to hose seven through the oil circuit block; one end of hose five is connected to the pilot oil unloading port of the adjustable boom cylinder explosion-proof valve, and the other end is connected to hose six through the oil circuit block.

[0010] Preferably, the bracket is an L-shaped bracket.

[0011] An excavator is provided with the above-mentioned adjustable boom oil cylinder pipeline arrangement structure.

[0012] Preferably, the bracket is installed on a wire seat near the pin shaft at the lower side of the boom.

[0013] Preferably, the sixth hose body is installed and fixed on the boom after passing around the pin at the hinge between the boom and the upper frame, and the seventh hose body is installed and fixed on the boom after passing around the pin at the hinge between the boom and the upper frame.

[0014] Preferably, the blind pipe is installed on the wire seat on the lower side of the boom through pipe clamp 1, the left side of steel pipe 3 is installed on the wire seat on the left side of the boom through pipe clamp 4, and the right side of steel pipe 3 is installed on the wire seat on the right side of the boom through pipe clamp 3.

[0015] Preferably, the second steel pipe is installed on the adjustable boom cylinder through a second pipe clamp.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The main pipeline of the adjustable boom cylinder does not need to be routed to the adjustable boom. Instead, the steel pipe and rubber hose design avoids the possible interference caused by the two boom cylinders. The pipeline is directly fixed on the wire seat on the side of the boom, and then directly connected to the fixed point of the upper rack pipeline through the rubber hose, which greatly shortens the length of the pipeline, reduces the pressure loss of the pipeline, and reduces the cost at the same time;

[0018] 2. The pipelines are arranged under and on the side of the boom, without occupying the upper surface of the boom, and without occupying the layout space of the boom cylinder and bucket cylinder pipelines, thus saving more space for the layout of other pipelines;

[0019] 3. The overall pipeline is roughly symmetrically distributed. Only two moving hoses are used on one side of the main pipeline to realize the pipeline layout of the adjustable boom cylinder. Under the various postures of the adjustable boom and the boom, the pipeline is shortest and optimal, the hose bends naturally, and is simple and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the pipeline arrangement structure of the adjustable boom oil cylinder in the utility model;

[0021] Figure 2 It is a structural schematic diagram of the steel pipe three in the utility model;

[0022] Figure 3 It is a structural schematic diagram of the installation and use state of the pipeline arrangement structure of the adjustable boom oil cylinder in the utility model;

[0023] Figure 4 It is a schematic diagram of the structure of the bracket in the utility model;

[0024] Figure 5 It is a structural schematic diagram of the utility model when the stroke of the boom oil cylinder is the smallest and the stroke of the adjustable boom oil cylinder is the smallest;

[0025] Figure 6 It is a schematic diagram of the overall structure of the pipeline when the stroke of the boom oil cylinder is the smallest and the stroke of the adjustable boom oil cylinder is the smallest in the utility model;

[0026] Figure 7 It is a structural schematic diagram of the utility model when the stroke of the boom oil cylinder is the largest and the stroke of the adjustable boom oil cylinder is the largest;

[0027] Figure 8 It is a schematic diagram of the overall structure of the pipeline when the stroke of the boom oil cylinder is at its maximum and the stroke of the adjustable boom oil cylinder is at its maximum in the utility model;

[0028] Fig. 9 It is a top view of the pipeline arrangement structure of the adjustable boom oil cylinder in the utility model;

[0029] Fig.10 It is a structural schematic diagram of the prior art.

[0030] In the figure: 1. Pipe clamp 1; 2. Hose 1; 3. Pipe clamp 2; 4. Hose 2; 5. Steel pipe 1; 6. Steel pipe 2; 8. Pipe clamp 3; 9. Hose 3; 10. Hose 5; 11. Hose 6; 12. Hose 7; 13. Bracket; 14. Oil block; 15. Hose 8; 16. Hose 4; 17. Pipe clamp 4; 18. Rack; 19. Boom; 20. Adjustable boom; 21. Adjustable boom oil cylinder; 22. Boom oil cylinder; 23. Pin shaft;

[0031] 7. Steel pipe three; 71. Welding joint A; 72. Steel pipe assembly one; 73. Welding joint C; 74. Blind pipe; 75. Welding joint D; 76. Steel pipe assembly two; 77. Welding joint B. DETAILED DESCRIPTION

[0032] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0033] Embodiment 1:

[0034] like Figure 1 As shown, an adjustable boom oil cylinder pipeline arrangement structure includes a main pipeline assembly and an explosion-proof valve pilot pipeline assembly, the main pipeline assembly includes a steel pipe 1 5, a steel pipe 2 6, a steel pipe 3 7, a rubber hose 1 2, a rubber hose 2 4, a rubber hose 3 9 and a rubber hose 4 16, one end of the steel pipe 2 6 is connected to the large cavity of the adjustable boom oil cylinder 21, the other end of the steel pipe 2 6 is connected to the left side of the steel pipe 3 7 through the rubber hose 1 2, one end of the rubber hose 4 16 is installed on the left side of the excavator upper frame 18, and the other end of the rubber hose 4 16 is connected to the left end of the steel pipe 3 7 One end of the steel pipe 15 is connected to the small cavity of the adjustable boom cylinder 21, and the other end of the steel pipe 15 is connected to the right side of the steel pipe 3 7 through the hose 24. One end of the hose 39 is installed on the right side of the excavator frame 18, and the other end of the hose 39 is connected to the right end of the steel pipe 37. The hose 4 16, the left part of the steel pipe 37, the hose 12 and the steel pipe 26 constitute the large cavity pipeline of the adjustable boom cylinder 21, and the hose 39, the right part of the steel pipe 37, the hose 24 and the steel pipe 15 constitute the small cavity pipeline of the adjustable boom cylinder 21.

[0035] Preferably, hose 1 2 and hose 2 4 are symmetrically distributed between the boom 19 and the boom cylinder 22. Hose 1 2 and hose 2 4 are movable hoses, and their bending posture will change with the changes of the boom 19 and the adjustable boom 20. Like hose 3 9 and hose 4 16, the two hoses are symmetrically distributed on both sides of the boom 19. Hose 3 9 and hose 4 16 are movable hoses, and their bending posture will change with the changes of the boom 19 and the adjustable boom 20.

[0036] like Figure 2 As shown, the steel pipe three 7 includes a welding head A71, a steel pipe component one 72, a welding head C73, a blind pipe 74, a welding head D75, a steel pipe component two 76 and a welding head B77. The welding head A71 is connected to the welding head C73 through the steel pipe component one 72, and the welding head B77 is connected to the welding head D75 through the steel pipe component two 76. The blind pipe 74 is welded between the welding head C73 and the welding head D75, and the blind pipe 74 is not conductive in the middle; the welding head A71 is connected to the rubber hose four 16, and the welding head C73 is connected to the rubber hose one 2; the welding head B77 is connected to the rubber hose three 9, and the welding head D75 is connected to the rubber hose two 4.

[0037] In this embodiment, welding head A71 is exactly the same as welding head B77, steel pipe assembly 1 72 is exactly the same as steel pipe assembly 2 76, welding head C73 is exactly the same as welding head D75, and the steel pipe 7 has a symmetrical structure as a whole, which is used to adjust the overall direction of the pipeline to avoid the risk of interference between the pipeline and the two boom cylinders 22.

[0038] Further, the explosion-proof valve pilot line assembly includes a hose 5 10, a hose 6 11, a hose 7 12, a hose 8 15, a bracket 13 and an oil circuit block 14 installed on the bracket 13, one end of the hose 8 15 is connected to the pilot oil inlet of the adjustable boom cylinder explosion-proof valve, and the other end is connected to the hose 7 12 through the oil circuit block 14; one end of the hose 5 10 is connected to the pilot oil unloading port of the adjustable boom cylinder explosion-proof valve, and the other end is connected to the hose 6 11 through the oil circuit block 14; wherein, Figure 4 As shown, the bracket 13 is an L-shaped bracket.

[0039] In this embodiment, the rubber hose 7 12 and the rubber hose 8 15 form the explosion-proof valve pilot oil inlet pipeline, and the rubber hose 5 10 and the rubber hose 6 11 form the explosion-proof valve pilot oil unloading pipeline.

[0040] The bracket 13 is mounted on the wire seat near the pin 23 at the lower side of the boom 19, and the oil block 14 is fixed on the bracket 13. Among them, the hose 8 15 and the hose 5 10 are moving hoses, and the bending posture will change with the change of the boom 19 and the adjustable boom 20; the state of the hose 7 12 and the hose 6 11 is fixed, and the bending posture will not change with the change of the boom 19 and the adjustable boom 20, and the explosion-proof valve oil inlet pipeline and the oil unloading pipeline are symmetrically distributed.

[0041] Embodiment 2:

[0042] like Figure 3 As shown, an excavator is provided with the adjustable boom cylinder pipeline arrangement structure as described in Example 1.

[0043] Furthermore, the tube body of the sixth hose 11 is installed and fixed on the boom 19 after passing through the pin 23 at the hinge between the boom 19 and the upper frame 18, and the tube body of the seventh hose 12 is installed and fixed on the boom 19 after passing through the pin 23 at the hinge between the boom 19 and the upper frame 18.

[0044] For example Figure 3 As shown, the blind pipe 74 is installed on the wire seat on the lower side of the boom 19 through the pipe clamp 1, the left side of the steel pipe 37 is installed on the wire seat on the left side of the boom 19 through the pipe clamp 4 17, the right side of the steel pipe 37 is installed on the wire seat on the right side of the boom 19 through the pipe clamp 3 8, and the steel pipe 26 is installed on the adjustable boom cylinder 21 through the pipe clamp 23.

[0045] In the present utility model, with the movement of the boom cylinder 22 and the adjustable boom cylinder 21, the bending radius of the hose 1 2, the hose 2 4, the hose 4 16, and the hose 3 9 will change. When the stroke of the boom cylinder 22 is the minimum, the stroke of the adjustable boom cylinder 21 is the minimum as follows: Figure 5 As shown in the figure, the pipeline as a whole is Figure 6 shown.

[0046] When the stroke of the boom cylinder 22 is at its maximum, the maximum stroke of the adjustable boom cylinder 21 is as follows: Figure 7 As shown in the figure, the pipeline as a whole is Figure 8 shown.

[0047] like Fig. 9 As shown, the overall pipeline is roughly symmetrically distributed, and only two moving hoses are used on one side of the main pipeline to realize the pipeline layout of the adjustable boom cylinder 21. Under various postures of the adjustable boom 20 and the boom 19, the pipeline is shortest and optimal, the hose bends naturally, and is simple and beautiful.

Claims

1. An adjustable boom cylinder pipeline arrangement structure, characterized in that: The invention comprises a main pipeline assembly and an explosion-proof valve pilot pipeline assembly, wherein the main pipeline assembly comprises a steel pipe 1 (5), a steel pipe 2 (6), a steel pipe 3 (7), a rubber pipe 3 (9) and a rubber pipe 4 (16), wherein one end of the steel pipe 2 (6) is connected to the large cavity of an adjustable arm oil cylinder (21), and the other end of the steel pipe 2 (6) is connected to the left side of the steel pipe 3 (7) through the rubber pipe 1 (2); one end of the rubber pipe 4 (16) is installed on the left side of an excavator frame (18), and the other end of the rubber pipe 4 (16) is connected to the left end of the steel pipe 3 (7); one end of the steel pipe 1 (5) is connected to the small cavity of the adjustable arm oil cylinder (21), and the other end of the steel pipe 1 (5) is connected to the right side of the steel pipe 3 (7) through the rubber pipe 2 (4); one end of the rubber pipe 3 (9) is installed on the right side of the excavator frame (18), and the other end of the rubber pipe 3 (9) is connected to the right end of the steel pipe 3 (7).

2. The adjustable boom cylinder pipeline arrangement structure according to claim 1 is characterized in that: The steel pipe three (7) comprises a welding head A (71), a steel pipe assembly one (72), a welding head C (73), a blind pipe (74), a welding head D (75), a steel pipe assembly two (76) and a welding head B (77). The welding head A (71) is connected to the welding head C (73) through the steel pipe assembly one (72), the welding head B (77) is connected to the welding head D (75) through the steel pipe assembly two (76), and the blind pipe (74) is arranged between the welding head C (73) and the welding head D (75), and the middle of the blind pipe (74) is not conductive.

3. The adjustable boom cylinder pipeline arrangement structure according to claim 2 is characterized in that: The welding head A (71) is connected to the rubber hose four (16), the welding head C (73) is connected to the rubber hose one (2), and the rubber hose four (16), the left part of the steel pipe three (7), the rubber hose one (2) and the steel pipe two (6) constitute a large cavity pipeline of the adjustable arm oil cylinder (21); the welding head B (77) is connected to the rubber hose three (9), the welding head D (75) is connected to the rubber hose two (4), and the rubber hose three (9), the right part of the steel pipe three (7), the rubber hose two (4) and the steel pipe one (5) constitute a small cavity pipeline of the adjustable arm oil cylinder (21).

4. The adjustable boom cylinder pipeline arrangement structure according to claim 2 or 3, characterized in that: The explosion-proof valve pilot pipeline assembly comprises a rubber hose five (10), a rubber hose six (11), a rubber hose seven (12), a rubber hose eight (15), a bracket (13) and an oil circuit block (14) mounted on the bracket (13); one end of the rubber hose eight (15) is connected to the pilot oil inlet of the adjustable boom cylinder explosion-proof valve, and the other end is communicated with the rubber hose seven (12) through the oil circuit block (14); one end of the rubber hose five (10) is connected to the pilot oil discharge port of the adjustable boom cylinder explosion-proof valve, and the other end is communicated with the rubber hose six (11) through the oil circuit block (14).

5. The adjustable boom cylinder pipeline arrangement structure according to claim 4 is characterized in that: The bracket (13) is an L-shaped bracket.

6. An excavator, characterized in that: The excavator is provided with the adjustable boom cylinder pipeline arrangement structure as claimed in claim 4.

7. The excavator according to claim 6, characterized in that: The bracket (13) is mounted on a wire seat near the pin (23) at the lower side of the movable arm (19).

8. The excavator according to claim 6, characterized in that: The tube body of the sixth rubber hose (11) is installed and fixed on the movable arm (19) after passing through the pin shaft (23) at the hinged joint between the movable arm (19) and the upper frame (18), and the tube body of the seventh rubber hose (12) is installed and fixed on the movable arm (19) after passing through the pin shaft (23) at the hinged joint between the movable arm (19) and the upper frame (18).

9. The excavator according to claim 6, characterized in that: The blind tube (74) is installed on the wire seat at the lower side of the movable arm (19) through a pipe clamp one (1), the left side of the steel pipe three (7) is installed on the wire seat at the left side of the movable arm (19) through a pipe clamp four (17), and the right side of the steel pipe three (7) is installed on the wire seat at the right side of the movable arm (19) through a pipe clamp three (8).

10. The excavator according to claim 6, characterized in that: The second steel pipe (6) is installed on the adjustable arm oil cylinder (21) through the second pipe clamp (3).

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