Device for preventing lifting arm of mechanical excavator from being jacked up

Abstract

The utility model discloses a device for preventing a cargo boom of a mechanical excavator from being jacked up, and relates to the technical field of mechanical excavators. A plurality of fixed blocks are fixedly arranged on the side surface of the rotating plate respectively; the right ends of the two fixing rods are connected with the fixing block on the right side, and a plurality of clamping grooves are formed in the inner walls of the fixing rods at equal intervals. The left end of the movable rod is connected with the fixing block on the left side, the movable rod is movably inserted into the fixing rod, a clamping assembly is arranged on the movable rod, and the clamping assembly and the clamping groove are clamped in a matched mode; after the cargo boom of the excavator rotates to a proper position, the movable rod is driven to move to a proper position in the fixed rod at the same time, and the movement of the movable rod is limited through the cooperation of the clamping assembly and the clamping groove, so that the movement of the cargo boom is limited, and the cargo boom is prevented from being jacked up.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical excavators, and particularly relates to a device for preventing the boom of a mechanical excavator from being lifted. Background Art

[0002] When the existing mechanical excavator is in use, it works through the rotation of the boom, and then through the bucket. Since the boom rotates to the limit device, the large arm and the small arm are prone to being lifted, which is not convenient for work. Therefore, there is an urgent need for a device for preventing the boom of a mechanical excavator from being lifted to solve the above problems. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a device for preventing the boom of a mechanical excavator from being lifted in view of the defects and deficiencies of the prior art, and its technical features can solve the above problems.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions: It includes a boom body; rotating plates are rotatably connected to the front and rear sides of the boom body by rotating shafts;

[0004]

[0005] It further includes:

[0006] Fixing blocks, several fixing blocks are respectively fixedly arranged on the side surfaces of the rotating plates;

[0007] Fixing rods, the fixing rods are arranged in a structure of a hollow cylinder with an open left end and there are two of them. The right ends of the two fixing rods are connected to the fixing blocks on the right side, and several card slots are equidistantly arranged on the inner wall of the fixing rods;

[0008] A movable rod, the left end of the movable rod is connected to the fixing block on the left side, and the movable rod is movably inserted into the fixing rod, and a card - setting component is arranged on the movable rod, and the card - setting component is cooperatively arranged with the card slots for card - setting.

[0009] Adopting the above design scheme, when the boom moves to a suitable position, the movable rod also moves to a suitable position. Through the cooperation of the card - setting component and the card slots, the movement of the movable rod is restricted, thereby preventing the boom from being lifted.

[0010] Further, the card - setting component includes:

[0011] A moving rod, the moving rod is movably inserted into the movable rod, a moving plate is arranged at the right end of the moving rod, and an adjusting groove is arranged at the right end of the movable rod;

[0012] Adjusting plates, several adjusting plates, the left ends of the several adjusting plates are rotatably connected to the adjusting groove by rotating rods, and both ends of the connecting rod are rotatably connected to the side surfaces of the adjusting plates and the moving plate by hinge seats respectively;

[0013] The electric push rod is fixedly arranged at the left end of the moving rod, and the output end of the electric push rod is connected to the end of the moving rod, and the electric push rod is connected to an external power supply.

[0014] With the above design, the electric push rod is used to control the movement of the movable rod, the movable rod drives the movable plate to move, and the connecting rod drives the adjustment plate to rotate, so that the adjustment plate is conveniently located in the slot, thereby limiting the movement of the movable rod.

[0015] Furthermore, wear-resistant strips are provided on the side walls of several adjustment plates to improve the wear resistance of the adjustment plates and increase the service life of the adjustment plates.

[0016] Furthermore, a positioning ring is provided on the fixed sleeve on the outer wall of the left end of the movable rod, the left end of the protective sleeve is connected to the positioning ring by bolts, and the protective sleeve is movable on the fixed rod, and a resistance pad is provided on the inner wall of the right end of the protective sleeve. The movable rod is protected inside by a protective tube to prevent the electric push rod from being subjected to external impact.

[0017] Furthermore, a resistance ring is provided at the right end of the protective sleeve, and the resistance ring is arranged to cooperate with the fixing rod to remove the hard concrete on the outer wall of the fixing rod by using the resistance ring, so as to facilitate the movement of the protective tube on the fixing rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. After the excavator boom rotates to the appropriate position, it drives the movable rod to move to the appropriate position in the fixed rod at the same time. The clamping assembly cooperates with the clamping slot to limit the movement of the movable rod, thereby limiting the movement of the boom and preventing the boom from lifting.

[0020] 2. Set up a card assembly, control the movement of the movable rod through the electric push rod, and the movable rod drives the movable plate to move to the appropriate position, and cooperates with the connecting rod to drive the adjustment plate to rotate, so that the adjustment plate is movable and fixed in the card slot, thereby limiting the movement of the movable rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the present utility model.

[0022] Figure 2 It is a schematic diagram of the connection structure of the movable rod and the fixed rod in the utility model.

[0023] Figure 3 It is a schematic diagram of the internal structure of the fixing rod in the utility model.

[0024] Figure 4 It is a structural diagram of the movable rod and the moving rod in the utility model.

[0025] Figure 5It is a structural diagram of the protection tube and the resistance pad in the utility model.

[0026] Description of reference numerals:

[0027] Boom body 1, rotating plate 2, fixed block 3, fixed rod 4, slot 5, movable rod 6, clamping assembly 7, moving rod 8, moving plate 9, adjustment slot 10, adjustment plate 11, connecting rod 12, electric push rod 13, wear strip 14, positioning ring 15, protective cover 16, contact pad 17, contact ring 18 DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The preferred embodiments in the description are only used as examples. All other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

[0029] like Figure 1 -- Figure 5 As shown, this embodiment adopts the following technical solution: it comprises a boom body 1; a rotating plate 2 is connected to the front and rear sides of the boom body 1 by a rotating shaft;

[0030] It also contains:

[0031] Fixed blocks 3, there are several fixed blocks 3, and several fixed blocks 3 are respectively fixedly arranged on the side of the rotating plate 2, and the fixed blocks 3 play a positioning role;

[0032] The fixing rod 4 is a cylindrical structure with an opening at the left end and is provided in pairs. The right ends of the two fixing rods 4 are connected to the fixing block 3 on the right side. Several slots 5 are provided on the inner wall of the fixing rod 4 at equal intervals. The fixing rod 4 starts the limit function and is rotated to the corresponding position according to the position of the boom through the rotating plate 2;

[0033] The movable rod 6 has its left end connected to the fixed block 3 on the left, and the movable rod 6 is movably inserted into the fixed rod 4. The movable rod 6 is provided with a clamping assembly 7, which is clamped in conjunction with the clamping slot 5. The boom is connected to the fixed rod 4 and the movable rod 6. The clamping assembly 7 includes:

[0034] The movable rod 8 is movably inserted in the movable rod 6. The right end of the movable rod 8 is provided with a movable plate 9. The right end of the movable rod 6 is provided with an adjustment slot 10. The movable rod 8 drives the movable plate 9 to move in the fixed rod 4, and the peripheral wall of the movable plate 9 movably contacts the inner wall of the fixed rod 4.

[0035] Adjusting plates 11. There are several adjusting plates 11. The left ends of the several adjusting plates 11 are rotatably connected in the adjusting slots 10 by rotating rods. Both ends of the connecting rod 12 are rotatably connected to the side surface of the adjusting plate 11 and the moving plate 9 respectively by hinge seats. The moving plate 9 drives the adjusting plate 11 to rotate through the connecting rod 12, so that the adjusting plate 11 is clamped in the card slot 5. Wear-resistant strips 14 are provided on the side walls of the several adjusting plates 11 to improve the wear resistance of the adjusting plates 11 and extend the service life of the adjusting plates 11;

[0036] Electric push rod 13. The electric push rod 13 is fixedly arranged at the left end of the moving rod 8, and the output end of the electric push rod 13 is connected to the end of the moving rod 8. The electric push rod 13 is connected to an external power supply, and the movement of the moving rod 8 is controlled by the electric push rod 13;

[0037] A positioning ring 15 is fixedly sleeved on the outer wall of the left end of the movable rod 6. The left end of the protective sleeve 16 is connected to the positioning ring 15 by bolts, and the protective sleeve 16 is movably sleeved on the fixed rod 4. A resisting pad 17 is provided on the inner wall of the right end of the protective sleeve 16. The movable rod 6 is protected by the protective tube to prevent the electric push rod 13 from being externally impacted. A resisting ring 18 is provided at the right end of the protective sleeve 16, and the resisting ring 18 is arranged in a mating and resisting manner with the fixed rod 4. The hard concrete on the outer wall of the fixed rod is removed by the resisting ring 18 to facilitate the movement of the protective tube on the fixed rod 4.

[0038] When using the present utility model, when the boom and the forearm of the excavator move to appropriate positions, the corresponding fixed rod 4 and movable rod 6 are driven to move simultaneously, so that the movable rod 6 moves to an appropriate position. The electric push rod 13 is turned on, and the electric push rod 13 pushes the moving rod 8 to move in the fixed rod 4. The moving rod 8 drives the moving plate 9 to move, and the moving plate 9 drives the adjusting plate 11 to rotate through the connecting rod 12, so that the adjusting plate 11 is movably clamped in the corresponding card slot 5, thereby restricting the movement of the movable rod 6, and further restricting the movement of the boom and the forearm in the excavator boom to prevent the boom from lifting;

[0039] At the same time, the operator fixes the protective tube on the positioning ring 15 with bolts, and protects the movable rod 6 with the protective tube to prevent the electric push rod 13 from being externally impacted.

[0040] After adopting the above structure, the beneficial effects of the present specific embodiment are as follows:

[0041] 1. After the excavator boom rotates to an appropriate position, the movable rod 6 is driven to move to an appropriate position in the fixed rod 4 at the same time. Through the cooperation of the clamping component 7 and the card slot 5, the movement of the movable rod 6 is restricted, thereby restricting the movement of the boom and preventing the boom from lifting;

[0042] 2. Set the card - setting component 7. Control the movement of the moving rod 8 through the electric push rod 13. The moving rod 8 drives the moving plate 9 to move to a suitable position, and cooperates with the connecting rod 12 to drive the adjusting plate 11 to rotate, so that the adjusting plate 11 is movably clamped in the card slot 5, thereby restricting the movement of the movable rod 6.

[0043] For those skilled in the art, they can modify the technical solutions recorded in the foregoing embodiments and make equivalent replacements for some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A mechanical excavator anti-boom-lifting device, which comprises a boom body (1); rotating plates (2) are rotatably connected to the front and rear sides of the boom body (1) by means of rotating shafts; It is characterized in that It further comprises: Fixed blocks (3), several of said fixed blocks (3) are respectively fixedly arranged on the side surfaces of the rotating plates (2); Fixed rods (4), said fixed rods (4) are arranged in a structure of a hollow cylinder with an open left end and there are two of them. The right ends of the two fixed rods (4) are connected to the right fixed block (3). Several card slots (5) are equidistantly arranged on the inner wall of the fixed rod (4); A movable rod (6), the left end of the movable rod (6) is connected to the left fixed block (3), and the movable rod (6) is movably inserted into the fixed rod (4). A card-setting component (7) is arranged on the movable rod (6), and the card-setting component (7) cooperates with the card slots (5) for card-setting.

2. The mechanical excavator boom lifting prevention device according to claim 1, wherein: The said card-setting component (7) comprises: A movable rod (8), the movable rod (8) is movably inserted into the movable rod (6). A movable plate (9) is arranged at the right end of the movable rod (8). An adjustment slot (10) is arranged at the right end of the movable rod (6); Adjusting plates (11), several of said adjusting plates (11) are rotatably connected to the adjustment slot (10) at the left end by means of rotating rods. The two ends of the connecting rod (12) are respectively rotatably connected to the side surface of the adjusting plate (11) and the movable plate (9) by means of hinge seats; An electric push rod (13), the electric push rod (13) is fixedly arranged at the left end of the movable rod (8), and the output end of the electric push rod (13) is connected to the end of the movable rod (8). The electric push rod (13) is connected to an external power supply.

3. A mechanical excavator boom lifting prevention device according to claim 2, characterized in that: Wear-resistant strips (14) are arranged on the side walls of several adjusting plates (11).

4. A mechanical excavator boom lifting prevention device according to claim 1, characterized in that: A positioning ring (15) is fixedly sleeved on the outer wall of the left end of the movable rod (6). The left end of the protective sleeve (16) is bolted to the positioning ring (15), and the protective sleeve (16) is movably sleeved on the fixed rod (4). A contact pad (17) is arranged on the inner wall of the right end of the protective sleeve (16).

5. A mechanical excavator anti-boom-lifting device according to claim 4, characterized in that: A contact ring (18) is arranged at the right end of the protective sleeve (16), and the contact ring (18) is arranged in a contact manner with the fixed rod (4).

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