Early warning device for leakage of bucket rod oil cylinder of excavator

Abstract

The invention discloses an excavator bucket rod oil cylinder leakage early warning device, and relates to the technical field of engineering machinery, the excavator bucket rod oil cylinder leakage early warning device comprises an excavator middle arm, the bottom end of the excavator middle arm is rotatably connected with an excavator small arm, the end, away from the excavator middle arm, of the excavator small arm is rotatably connected with an excavator bucket, and the top of the excavator middle arm is provided with a bucket rod oil cylinder; leakage protection devices are arranged at the two ends of the bucket rod oil cylinder, device springs are arranged on the inner sides of the leakage protection devices, leakage early warning devices are arranged on the inner sides of the leakage protection devices, and the whole bucket rod oil cylinder is covered through device shells and protection soft sheds. The undesirable conditions of power loss, function limitation, hydraulic oil loss and the like caused by unnecessary leakage of hydraulic oil are effectively avoided, and the problems that more serious mechanical damage is caused by the leaked hydraulic oil, even more complex mechanical faults are possibly caused, and higher maintenance cost and longer repair time need to be paid are solved. Therefore, further serious and worsening of problems can be effectively avoided and prevented.

Description

Technical Field

[0001] The invention relates to the technical field of engineering machinery, and in particular to an early warning device for leakage of an oil cylinder of an excavator arm. Background Art

[0002] An excavator, also known as an earthmoving machine, uses a bucket to dig materials above or below the bearing surface and loads them to transport vehicles or unloads them to stockpiles. Its main excavation materials include soil, coal, sand, etc. It has become one of the main construction machinery in engineering construction. In the operation of professional large-scale excavation machinery and equipment, the arm cylinder, as a key hydraulic oil pipe, plays an important role in leading the operation of the entire bucket. For this, it has extremely high standards for the airtightness of its own cavity. Its highly precise working principle and operation mode, as well as long-term and high-frequency use, may also be affected by various external pressures, which are likely to cause hydraulic oil leakage inside the cavity of the arm cylinder, thereby affecting the service life of the entire arm cylinder. At the same time, this leakage phenomenon also brings considerable safety hazards to the normal operation of the equipment.

[0003] Therefore, an early warning device for leakage of an excavator arm cylinder is proposed. Summary of the invention

[0004] The object of the present invention is to provide an excavator boom cylinder leakage warning device to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an excavator boom cylinder leakage warning device, comprising an excavator middle arm, the bottom end of the excavator middle arm is rotatably connected to an excavator forearm, the end of the excavator forearm away from the excavator middle arm is rotatably connected to an excavator bucket, a boom cylinder is arranged on the top of the excavator middle arm, leakage protection devices are arranged at both ends of the boom cylinder, a device spring is arranged inside the leakage protection device, and a leakage warning device is arranged inside the leakage protection device.

[0006] Preferably, the leakage protection device includes a device shell, which is fixedly connected to the two ends of the boom cylinder, a fixed spring is fixedly connected to the bottom of the inner cavity of the device shell, one end of the fixed spring away from the bottom of the device shell is fixedly connected to a limit plate, a limit block is arranged on the upper surface of the limit plate, the inner wall of the device shell and the top of the limit block are fixedly connected to a limit column, the top of the limit block is plugged into the limit column, the side of the limit block away from the inner wall of the device shell is fixedly connected to the device spring, a movable panel is symmetrically and slidably connected to the inner side of the device shell, a protective soft shed is fixedly connected to the side of the movable panel close to the device shell, and one end of the protective soft shed away from the movable panel is fixedly connected to the inner wall of the device shell, a trigger device is fixedly connected to the two ends of the boom cylinder and located inside the device shell, and a trigger block is movably connected inside the trigger device.

[0007] Preferably, the leakage warning device includes a dust storage device, which is fixedly connected to a side of a movable panel close to a device casing, an inner push plate is slidably connected inside the dust storage device, a push column is fixedly connected to the side of the inner push plate away from the trigger device, an outer push plate is fixedly connected to the push column at one end away from the dust storage device, a release hole is penetrated through the side of the dust storage device close to the trigger device, and a guide plate is fixedly connected to the side of the dust storage device close to the trigger device.

[0008] Preferably, the movable panels are provided in two groups, and the two groups of movable panels are respectively arranged on both sides of the boom cylinder, a group of surfaces of the movable panels close to the hinge between the excavator middle arm and the excavator forearm are provided with a concave elliptical notch, and a group of surfaces of the movable panels away from the hinge between the excavator middle arm and the excavator forearm are provided with a convex elliptical notch, and the surface of the movable panel is provided with a circular groove matched with the diameter of the device spring, and the device spring passes through the bottom of the movable panel.

[0009] Preferably, the limit plate is L-shaped, and the L-shaped vertical plate of the limit plate is engaged with the bottom of the limit block, thereby limiting the movement of the limit block.

[0010] Preferably, the trigger device is a hollow container that wraps around both ends of the boom cylinder. A conduit is provided at the bottom of the trigger device, which serves to timely detect leakage of the boom cylinder. The trigger block slides vertically in the inner cavity of the conduit at the bottom of the trigger block, which serves to timely trigger the remaining devices when the boom cylinder leaks.

[0011] Preferably, the protective soft shed is a stretchable black waterproof soft cloth that is greatly different in color from the boom cylinder, which serves to create a sealing area in the boom cylinder and warn staff based on the color. A slot that allows a limit block to pass through is provided on the side of the device casing close to the movable panel, and the slot of the device casing is adapted to the diameter of the device spring.

[0012] Preferably, the guide plate is a curved surface, which serves to guide the dust injection direction, and the dust storage device is provided with colored dust inside, which serves to warn the staff according to the color and shape of the dust after injection.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The arm cylinder is covered as a whole by the device shell and protective soft shed, which effectively avoids the power loss, functional limitation and hydraulic oil loss caused by unnecessary leakage of hydraulic oil, and prevents the leakage of hydraulic oil from causing more serious mechanical damage, and even more complex mechanical failures, which may require higher maintenance costs and longer repair time, thereby effectively avoiding and preventing the problem from becoming more serious and worse;

[0015] 2. By giving the staff the first warning through the protective soft shed 53, the purpose of timely creating a sealing area and giving the staff a striking warning when the boom cylinder 4 leaks is achieved, solving the problem of reduced operating accuracy and strength of the excavator due to undiscovered continuous leakage of the boom cylinder 4;

[0016] 3. The colored dust is emitted to both sides, giving the staff a second warning, thereby achieving the effect of a second warning to the staff of the leakage of the boom cylinder 4. With the help of the second warning, the warning effect is effectively achieved, which helps to curb potential risks in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic elevation diagram of the whole of the present invention;

[0018] Figure 2 This is a schematic diagram of the positions of the spring and the leakage protection device of the device of the present invention;

[0019] Figure 3 For the present invention Figure 2 The enlarged schematic diagram at A in the middle;

[0020] Figure 4 It is a cross-sectional schematic diagram of the upper half of the present invention;

[0021] Figure 5 For the present invention Figure 4 The enlarged schematic diagram of point B in the middle;

[0022] Figure 6 It is a schematic diagram of the positions of two sets of leakage protection devices of the present invention;

[0023] Figure 7 It is a cross-sectional schematic diagram of the leakage protection device of the present invention;

[0024] Figure 8 For the present invention Figure 7 The enlarged schematic diagram at C in the middle;

[0025] Fig. 9 This is a schematic diagram of the flat notch of the movable panel of the present invention;

[0026] Fig.10 This is a schematic diagram of the internal relationship of the leakage protection device of the present invention;

[0027] Fig.11 For the present invention Fig.10 The enlarged schematic diagram at D in the middle;

[0028] Fig.12 This is a schematic diagram of the position of the leakage warning device of the present invention;

[0029] Fig.13 For the present invention Fig.12 Enlarged schematic diagram at point E in the middle.

[0030] In the figure:

[0031] 1. Excavator middle arm; 2. Excavator forearm; 3. Excavator bucket; 4. Dipper cylinder;

[0032] 5. Leakage protection device; 51. Device housing; 52. Moving panel; 53. Protective soft shed; 54. Trigger device; 55. Trigger block; 56. Fixed spring; 57. Limit plate; 58. Limit block; 59. Limit column;

[0033] 6. Install the spring;

[0034] 7. Leakage warning device; 71. Dust storage device; 72. Outward push plate; 73. Push column; 74. Inward push plate; 75. Release hole; 76. Guide plate. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 13 , the present invention provides a technical solution:

[0037] Example:

[0038] A digger arm cylinder leakage warning device comprises an excavator middle arm 1, the bottom end of the excavator middle arm 1 is rotatably connected to an excavator arm 2, the end of the excavator arm 2 away from the excavator middle arm 1 is rotatably connected to an excavator bucket 3, a digger arm cylinder 4 is arranged on the top of the excavator middle arm 1, leakage protection devices 5 are arranged at both ends of the digger arm cylinder 4, a device spring 6 is arranged inside the leakage protection device 5, and a leakage warning device 7 is arranged inside the leakage protection device 5.

[0039] The leakage protection device 5 includes a device shell 51, which is fixedly connected to the two ends of the boom cylinder 4. A notch is provided on one side of the device shell 51 close to the movable panel 52 to allow a limit block 58 to pass through. The notch of the device shell 51 is adapted to the diameter of the device spring 6. A fixed spring 56 is fixedly connected to the bottom of the inner cavity of the device shell 51. The end of the fixed spring 56 away from the bottom of the device shell 51 is fixedly connected to a limit plate 57. The limit plate 57 is L-shaped. The L-shaped vertical plate of the limit plate 57 is engaged with the bottom of the limit block 58 to limit the movement of the limit block 58. The upper surface of the limit plate 57 is provided with a limit block 58. A limit column 59 is fixedly connected to the inner wall of the device shell 51 and located at the top of the limit block 58. The top of the limit block 58 is plugged into the limit column 59. The side of the limit block 58 away from the inner wall of the device shell 51 is fixedly connected to the device spring 6. The device shell 51 A movable panel 52 is symmetrically and slidably connected on the inner side, and a protective soft shed 53 is fixedly connected to one side of the movable panel 52 close to the device casing 51. The protective soft shed 53 is an extendable black waterproof soft cloth with a large color difference from the boom cylinder 4, which plays a role in creating a sealing area in the boom cylinder 4 and alerting the staff according to the color. The end of the protective soft shed 53 away from the movable panel 52 is fixedly connected to the inner wall of the device casing 51, and trigger devices 54 are fixedly connected at both ends of the boom cylinder 4 and located inside the device casing 51. The trigger device 54 is a hollow container that wraps the two ends of the boom cylinder 4. A conduit is provided at the bottom of the trigger device 54, which plays a role in timely detecting leakage of the boom cylinder 4. A trigger block 55 is movably connected inside the trigger device 54, and the trigger block 55 slides vertically in the inner cavity of the conduit at the bottom of the trigger block 55, which plays a role in timely triggering the remaining devices when the boom cylinder 4 leaks.

[0040] The leakage warning device 7 includes a dust storage device 71, which is fixedly connected to the side of the movable panel 52 close to the device housing 51. Colored dust is arranged inside the dust storage device 71, which serves to warn the staff according to the color and shape of the dust after being sprayed. An inner push plate 74 is slidably connected to the inside of the dust storage device 71, and a push column 73 is fixedly connected to the side of the inner push plate 74 away from the trigger device 54. The push column 73 is fixedly connected to the outer push plate 72 at one end away from the dust storage device 71. A release hole 75 is penetrated through the side of the dust storage device 71 close to the trigger device 54. A guide plate 76 is fixedly connected to the side of the dust storage device 71 close to the trigger device 54. The guide plate 76 is a curved surface, which serves to guide the direction of dust spraying.

[0041] There are two groups of movable panels 52, which are respectively arranged on both sides of the boom cylinder 4. A group of surfaces of the movable panels 52 close to the hinge between the excavator middle arm 1 and the excavator arm 2 is provided with an inwardly concave elliptical notch, and a group of surfaces of the movable panels 52 away from the hinge between the excavator middle arm 1 and the excavator arm 2 is provided with an outwardly convex elliptical notch. A circular groove matching the diameter of the device spring 6 is provided on the surface of the movable panel 52, and the device spring 6 passes through the bottom of the movable panel 52.

[0042] Working principle:

[0043] In the initial state, there is no leakage at both ends of the boom cylinder 4, no accumulated liquid is stored inside the trigger device 54, the trigger block 55 is not pushed by the accumulated liquid and is in the highest position of the bottom conduit of the trigger device 54, the limit plate 57 is not impacted and is in a horizontal state, the fixed spring 56 is not compressed, the limit block 58 is in a clamping state with the limit plate 57 under the action of the limit column 59, the device spring 6 is stretched, the movable panel 52 is inside the device housing 51, the protective soft shed 53 is not unfolded, the outer push plate 72 is not squeezed, and the inner push plate 74 does not squeeze the colored dust inside the dust storage device 71.

[0044] During operation, when hydraulic oil leaks from the interface at either end of the boom cylinder 4, because the trigger device 54 is at the interface of the boom cylinder 4, the leaked hydraulic oil will be collected in the trigger device 54. When the hydraulic oil inside the trigger device 54 is excessive, the hydraulic oil squeezes the trigger block 55 to the bottom of the trigger device 54, and the trigger block 55 falls in the conduit at the bottom of the trigger device 54. After the trigger block 55 falls downward along the pipeline in the lower half of the trigger device 54, it pushes the limit plate 57 to move downward and compresses the fixing spring 56. When the limit plate 57 moves downward, it cannot contact and engage with the limit block 58, and the limit block 58 is no longer limited by the contact of the limit plate 57. At this time, the limit block 58 is driven to move toward the center direction of the boom cylinder 4 under the elastic contraction of the device spring 6, and the displacement The movable panel 52 is symmetrically provided with two groups of through circular grooves, the size of which is larger than the size of the device spring 6. The device spring 6 continues to move, and the size of the circular groove is larger than the size of the limit block 58. The limit block 58 is limited in movement. Under the force of the device spring 6 driving the limit block 58 to move, the movable panel 52 begins to move along the boom cylinder 4 toward another group of leakage protection devices 5. At this time, the protective soft shed 53 of the boom cylinder 4 will gradually unfold during the movement of the movable panel 52. The first warning is given to the staff through the visual effect of the unfolding of the black color of the protective soft shed 53, so that the purpose of timely creating a sealing area and giving the staff a striking warning when the boom cylinder 4 leaks is achieved, and the problem of reduced operating accuracy and strength of the excavator due to the undiscovered continuous leakage of the boom cylinder 4 is solved. .

[0045] When the two groups of movable panels 52 contact each other, the outer push plates 72 fixedly connected to the leakage warning device 7 on both sides of the movable panels 52 will collide with the other group of outer push plates 72. After the two outer push plates 72 are squeezed, the inner push plates 74 are driven by the push columns 73 to squeeze the colored dust into the dust storage device 71. At this time, the colored dust inside the dust storage device 71 will be ejected from the release holes 75. The ejected colored dust will be guided by the guide plates 76, and the colored dust will be emitted to both sides, thereby giving the staff a second warning, thereby achieving the effect of secondary warning the staff of the leakage of the boom cylinder 4. With the help of the secondary warning, the warning effect is effectively achieved, which helps to curb potential risks in time.

[0046] At the same time, when the two movable panels 52 come into contact with each other, the two groups of movable panels 52 are affected by the contact effect, and the concave and convex grooves on the surfaces of the two groups of movable panels 52 are snapped in, and the two groups of leakage protection devices 5 are connected as a whole after being snapped in, thereby increasing the volume ratio of the leakage protection device 5 and the protective soft shed 53 to avoid the situation where the leakage protection device 5 and the protective soft shed 53 on one side cannot contain volume due to excessive leakage pressure. At this time, the device housing 51 and the protective soft shed 53 cover the boom cylinder 4 as a whole, effectively avoiding the power loss, functional limitation and hydraulic oil loss caused by unnecessary leakage of hydraulic oil, and avoiding the leakage of hydraulic oil to cause more serious mechanical damage, and even more complicated mechanical failures, which require higher maintenance costs and longer repair time, thereby effectively avoiding and preventing the problem from becoming more serious and worse.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An excavator arm cylinder leakage warning device, comprising an excavator middle arm (1), the bottom end of the excavator middle arm (1) is rotatably connected to an excavator arm (2), one end of the excavator arm (2) away from the excavator middle arm (1) is rotatably connected to an excavator bucket (3), and a dipper arm cylinder (4) is arranged on the top of the excavator middle arm (1), characterized in that: Both ends of the boom oil cylinder (4) are provided with leakage protection devices (5), a device spring (6) is provided inside the leakage protection device (5), and a leakage warning device (7) is provided inside the leakage protection device (5).

2. The excavator arm cylinder leakage warning device according to claim 1 is characterized in that: The leakage protection device (5) comprises a device housing (51), the device housing (51) is fixedly connected to the two ends of the boom cylinder (4), a fixing spring (56) is fixedly connected to the bottom of the inner cavity of the device housing (51), one end of the fixing spring (56) away from the bottom of the device housing (51) is fixedly connected to a limiting plate (57), a limiting block (58) is arranged on the upper surface of the limiting plate (57), a limiting column (59) is fixedly connected to the inner wall of the device housing (51) and located at the top of the limiting block (58), the top of the limiting block (58) is plugged into the limiting column (59), and the limiting The side of the positioning block (58) away from the inner wall of the device housing (51) is fixedly connected to the device spring (6); the inner side of the device housing (51) is symmetrically slidably connected to a movable panel (52); the side of the movable panel (52) close to the device housing (51) is fixedly connected to a protective soft shed (53); the end of the protective soft shed (53) away from the movable panel (52) is fixedly connected to the inner wall of the device housing (51); the two ends of the boom oil cylinder (4) and located inside the device housing (51) are fixedly connected to a trigger device (54); and the trigger device (54) is movably connected inside to a trigger block (55).

3. The excavator arm cylinder leakage warning device according to claim 2 is characterized in that: The leakage warning device (7) comprises a dust storage device (71), the dust storage device (71) is fixedly connected to a side of the movable panel (52) close to the device housing (51), an inner push plate (74) is slidably connected inside the dust storage device (71), a push column (73) is fixedly connected to a side of the inner push plate (74) away from the trigger device (54), an outer push plate (72) is fixedly connected to an end of the push column (73) away from the dust storage device (71), a release hole (75) is penetrated through a side of the dust storage device (71) close to the trigger device (54), and a guide plate (76) is fixedly connected to a side of the dust storage device (71) close to the trigger device (54).

4. The excavator arm cylinder leakage warning device according to claim 2 is characterized in that: The movable panels (52) are provided in two groups, and the two groups of movable panels (52) are respectively provided on both sides of the boom cylinder (4); a group of surfaces of the movable panels (52) close to the hinge between the excavator middle arm (1) and the excavator arm (2) are provided with an inwardly concave elliptical notch, and a group of surfaces of the movable panels (52) away from the hinge between the excavator middle arm (1) and the excavator arm (2) are provided with an outwardly convex elliptical notch; a circular groove matching the diameter of the device spring (6) is provided on the surface of the movable panel (52), and the device spring (6) passes through the bottom of the movable panel (52).

5. The excavator arm cylinder leakage warning device according to claim 2 is characterized in that: The limiting plate (57) is L-shaped, and the L-shaped vertical plate of the limiting plate (57) is clamped with the bottom of the limiting block (58).

6. The excavator arm cylinder leakage warning device according to claim 2 is characterized in that: The trigger device (54) is a hollow container that wraps around the two ends of the boom cylinder (4). A conduit is provided at the bottom of the trigger device (54). The trigger block (55) slides vertically in the inner cavity of the conduit at the bottom of the trigger block (55).

7. The excavator arm cylinder leakage warning device according to claim 2 is characterized in that: The protective soft shed (53) is a stretchable black waterproof soft cloth that is greatly different in color from the boom oil cylinder (4). A notch is provided on one side of the device housing (51) close to the movable panel (52) to allow a limit block (58) to pass through. The notch of the device housing (51) is adapted to the diameter of the device spring (6).

8. The excavator arm cylinder leakage warning device according to claim 3 is characterized by: The guide plate (76) is a curved surface, and color dust is arranged inside the dust storage device (71).

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