Vehicle-mounted lifting arm for low and narrow space of coal mine

Abstract

The utility model relates to the technical field of mining machinery, in particular to a vehicle-mounted hoisting arm for a low and narrow space of a coal mine, which comprises a mounting seat assembly, a rotary seat, a pitching driving piece, a first arm frame, a second arm frame, a third arm frame and a hoisting piece, the rotary seat is mounted on the mounting seat assembly in a transshipment manner, and a back pitching arm is arranged on the rotary seat; the first arm frame is connected to the back pitching arm, and the pitching driving piece is connected between the rotary seat and the first arm frame; the second arm frame is inserted into the first arm frame in a sliding manner; the third arm frame is inserted into the second arm frame in a sliding manner; and the hoisting piece is connected to the tail end of the third arm support. According to the lifting arm, the height of the lifting arm can be fully compressed, the purpose of reducing the size and volume of the lifting arm is achieved, the length of the lifting arm in a retracted state can be further reduced, and the technical problem that in the prior art, a lifting arm arranged on a coal mine underground transport vehicle cannot be suitable for low and narrow roadways is solved.

Description

Technical Field

[0001] This utility model relates to the field of mining machinery technology, specifically to a vehicle-mounted lifting boom for use in low and narrow spaces in coal mines. Background Technology

[0002] Traditional thin and medium-thick coal seam mines typically have a net cross-sectional dimension (width × height) of roadways that is less than 4m × 3m, which are narrow and low roadways. Therefore, underground transportation and construction equipment in coal mines must have the characteristics of compact structure and small size.

[0003] Coal mine vehicle-mounted cranes are mainly mounted on various transport vehicles or work vehicles underground in coal mines. They are used to lift, transport, and load and unload various materials, machinery, tools, etc., and have outstanding advantages such as flexible operation, high construction efficiency, and low labor intensity.

[0004] Most of the existing underground transport vehicles or work vehicles in coal mines are not equipped with vehicle-mounted crane booms. They use traditional hoist cranes or monorail cranes for operation, which has poor flexibility, low construction efficiency, and high labor intensity. The crane booms of some vehicles are large in size and can only be used for construction in large roadways, and cannot be used in low and narrow roadways. Utility Model Content

[0005] The purpose of this utility model is to provide a vehicle-mounted lifting boom for use in low and narrow spaces in coal mines, so as to solve the technical problem that the lifting booms equipped on underground coal mine transport vehicles are not suitable for low and narrow roadways. The specific technical solution is as follows:

[0006] This utility model provides a vehicle-mounted crane boom for use in low-profile and narrow spaces in coal mines, including a mounting base assembly, a slewing base, a pitch drive, a first boom, a second boom, a third boom, and a lifting component. The slewing base is rotatably mounted on the mounting base assembly, and a rear-tilting arm is provided on the slewing base. The first boom is connected to the rear-tilting arm, and the pitch drive is connected between the slewing base and the first boom. The second boom is slidably inserted into the interior of the first boom. The third boom is slidably inserted into the interior of the second boom. The lifting component is connected to the end of the third boom.

[0007] A further improvement of this utility model of a vehicle-mounted crane boom for low and narrow spaces in coal mines is that the second boom includes a second frame and a second boom drive unit. The rear end of the second frame is inserted into the interior of the first boom, and the second boom drive unit is connected between the side of the first boom and the front side of the second frame.

[0008] A further improvement of this utility model for a vehicle-mounted crane boom in low and narrow spaces in coal mines is that the third boom includes a third frame and a three-boom drive unit. The rear end of the third frame passes through the interior of the second frame, and the three-boom drive unit is connected between the interiors of the second frame and the third frame.

[0009] A further improvement of this utility model for a vehicle-mounted crane boom in low and narrow spaces in coal mines is that the first boom includes a first frame, the top of which has an opening, and a protective cover is installed on the opening.

[0010] A further improvement of this utility model for a vehicle-mounted crane boom in low and narrow spaces in coal mines is that a lighting assembly is provided at the bottom front end of the first frame.

[0011] A further improvement of this utility model for a vehicle-mounted crane boom in low and narrow spaces in coal mines is that a rotary reducer for driving the rotation of the rotary base is connected between the rotary base and the mounting base assembly.

[0012] A further improvement of this utility model for a vehicle-mounted crane boom in low and narrow spaces in coal mines is that the slewing reducer is equipped with a self-locking cycloidal motor for locking the slewing base.

[0013] A further improvement of this utility model for a vehicle-mounted crane boom in low and narrow spaces in coal mines is that the mounting assembly includes a rotation limiting device for limiting the rotation angle of the slewing seat.

[0014] The application of the technical solution of this utility model has the following beneficial effects:

[0015] This utility model relates to a vehicle-mounted lifting boom for use in low-ceilinged and narrow spaces in coal mines. Through the design of a rear-tilting frame, the height of the lifting boom is significantly reduced, thus minimizing its size and volume. The first, second, and third booms, each with a two-stage telescopic function, further reduce the length of the boom in its retracted state. This solves the technical problem that existing lifting booms mounted on underground coal mine transport vehicles are unsuitable for low-ceilinged and narrow roadways. This utility model combines miniaturization, lightweight design, stability, and reliability, resulting in a lifting boom with advantages such as small size, strong lifting capacity, flexible operation, high construction efficiency, convenient operation, and low labor intensity.

[0016] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 This is a perspective view of the vehicle-mounted crane boom for use in low and narrow spaces in coal mines, according to this utility model.

[0019] Figure 2This is a side view of the vehicle-mounted crane boom for use in low and narrow spaces in coal mines, according to this utility model.

[0020] Figure 3 This is a longitudinal sectional view of the vehicle-mounted crane boom for use in low and narrow spaces in coal mines, according to this utility model.

[0021] Among them, 1-mounting base assembly; 2-slewing reducer; 3-slewing base; 4-pitch drive component; 5-first boom; 6-second boom; 7-third boom; 8-lifting component; 9-lighting lamp; 10-rear tilting frame; 2.1-slewing limit device; 2.2-self-locking cycloidal motor; 2.3-first frame; 2.4-protective cover; 2.5-lighting lamp mounting base; 2.6-first mounting flange; 2.7-second boom drive component; 2.8-second frame; 2.9-third boom drive component; 2.10-third frame. Detailed Implementation

[0022] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] See Figures 1-3 As shown, a vehicle-mounted crane boom for use in low and narrow spaces in coal mines includes a mounting base assembly 1, a slewing base 3, a pitch drive 4, a first boom 5, a second boom 6, a third boom 7, and a lifting component 8. The slewing base 3 is rotatably mounted on the mounting base assembly 1, and a rear-tilting arm is provided on the slewing base 3. The first boom 5 is connected to the rear-tilting arm, and the pitch drive 4 is connected between the slewing base 3 and the first boom 5. The second boom 6 is slidably inserted into the interior of the first boom 5. The third boom 7 is slidably inserted into the interior of the second boom 6. The lifting component 8 is connected to the end of the third boom 7.

[0024] Specifically, the "rear-tilting" structure of the rear-mounted frame aims to reduce the height of the lifting boom; a "forward-tilting" structure can also be used depending on actual needs. In this embodiment, the lifting component 8 uses a hydraulic chain hoist, which is used to lift and lower heavy objects. Hydraulic control offers advantages such as high load-bearing capacity, reliability, and durability. Electric or pneumatic hoists can also be used. The pitch drive component 4 uses a hydraulic cylinder. The rear-mounted frame has a hinge point for the first boom 5, and the slewing base 3 has a hinge point for the pitch drive component 4, used to realize the boom rotation function. This utility model can control the various movements of the lifting boom through an electrically controlled multi-way valve to achieve manual and wireless remote control operation.

[0025] Preferably, the second boom 6 includes a second frame 2.8 and a boom drive component 2.7. The rear end of the second frame 2.8 passes through the interior of the first boom 5, and the boom drive component 2.7 connects the side of the first boom 5 and the front side of the second frame 2.8. In this embodiment, the boom drive component 2.7 is a hydraulic cylinder. The second frame 2.8 is welded from high-strength steel plates, making it lightweight and with high bending strength. The second frame 2.8 has a hollow structure and a limit plate at the front end for limiting the third frame 2.10. The rear end of the second frame 2.8 has a flange for installing the boom drive component 2.9. The boom drive component 2.7 is installed on the side of the first frame 2.3. Through the front-mounted cylinder flange design and the screw-type piston rod design, the hydraulic cylinder has a very small installation distance, achieving the purpose of reducing the boom length.

[0026] Preferably, the third boom 7 includes a third frame 2.10 and a boom drive 2.9. The rear end of the third frame 2.10 passes through the interior of the second frame 2.8, and the boom drive 2.9 connects the interiors of the second frame 2.8 and the third frame 2.10. The third frame 2.10 is constructed from high-strength steel plates, making it lightweight and with high bending strength. The third frame 2.10 has a hollow structure and a hydraulic chain hoist hinge point at its front end. An internal flange is provided for mounting the boom drive 2.9. The second boom 6 and the third boom 7 are arranged in a staggered configuration, with one boom located outside the first boom and the other inside the third boom. Combined with a special cylinder design, this allows the boom to have two-stage telescopic functionality while further reducing the length of the boom in its retracted state. The purpose of using a front-mounted cylinder flange design and a screw-type piston rod design for the cylinders of the second boom 6 and the third boom 7 is to reduce the installation distance of the cylinders. Alternatively, flange-type piston rods and screw-type cylinder designs can also be used.

[0027] Preferably, the first boom 5 includes a first frame 2.3, the top of which has an opening on which a protective cover 2.4 is installed to protect the hydraulic lines and electrical wiring on the boom from damage. The first frame 2.3 also has a first mounting flange 2.6 for mounting and fixing the second boom drive component 2.7. The first frame 2.3 is made of high-strength steel plates, making it lightweight and with high bending strength. The first frame 2.3 has a hollow structure and a limit plate at the front end for limiting the second frame 2.8.

[0028] Preferably, the front bottom of the first frame 2.3 is provided with a lighting assembly. The lighting assembly includes a lighting fixture 2.5 and a lighting lamp 9. The lighting lamp 9 is mounted on the lighting fixture 2.5. The lighting fixture 2.5 has an arc-shaped slot design that allows for adjustment of the lighting angle, providing sufficient lighting for the lifting boom.

[0029] Preferably, a rotary reducer 2 for driving the rotary base 3 to rotate is connected between the rotary base 3 and the mounting base assembly 1. The rotary reducer 2 adopts a worm gear transmission form, which has the advantages of compact structure, large transmission ratio, and large output torque.

[0030] Preferably, the slewing reducer 2 is equipped with a self-locking cycloidal motor 2.2 for locking the slewing base 3 to ensure the locking reliability of the slewing reducer 2 during crane boom transportation and operation.

[0031] Preferably, the mounting base assembly 1 includes a rotation limiting device 2.1 for limiting the rotation angle of the slewing seat 3. The rotation limiting device 2.1 is detachably connected to the mounting base assembly 1 and works in conjunction with the protrusions on the slewing seat 3 to block the slewing seat 3, thereby preventing the risk of the boom colliding with other structures. The mounting base assembly 1 is a boom mounting and fixing mechanism, and it is provided with a mounting interface for the slewing reducer 2 and an external interface for connecting the boom to a vehicle.

[0032] This utility model relates to a vehicle-mounted lifting boom for use in low-ceilinged and narrow spaces in coal mines. Through the design of a rear-tilting frame, the height of the lifting boom is significantly reduced, thus minimizing its size and volume. The first boom 5, second boom 6, and third boom 7, all with two-stage telescopic functions, further reduce the length of the boom in its retracted state. This solves the technical problem that existing lifting booms mounted on underground coal mine transport vehicles are unsuitable for low-ceilinged and narrow roadways. This utility model combines miniaturization, lightweight design, stability, and reliability, resulting in a lifting boom with advantages such as small size, strong lifting capacity, flexible operation, high construction efficiency, convenient operation, and low labor intensity.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vehicle-mounted crane boom for use in low-ceilinged and narrow spaces in coal mines, characterized in that, The system includes a mounting base assembly (1), a slewing base (3), a pitch drive (4), a first boom (5), a second boom (6), a third boom (7), and a lifting component (8); the slewing base (3) is rotatably mounted on the mounting base assembly (1), and the slewing base (3) is provided with a rear-tilt arm; the first boom (5) is connected to the rear-tilt arm, and the pitch drive (4) is connected between the slewing base (3) and the first boom (5); the second boom (6) is slidably inserted into the interior of the first boom (5); the third boom (7) is slidably inserted into the interior of the second boom (6); and the lifting component (8) is connected to the end of the third boom (7).

2. The vehicle-mounted crane boom for use in low-ceilinged and narrow spaces in coal mines according to claim 1, characterized in that, The second boom (6) includes a second frame (2.8) and a second boom drive (2.7). The rear end of the second frame (2.8) passes through the interior of the first boom (5). The second boom drive (2.7) is connected between the side of the first boom (5) and the front side of the second frame (2.8).

3. The vehicle-mounted crane boom for use in low-ceilinged and narrow spaces in coal mines according to claim 2, characterized in that, The third boom (7) includes a third frame (2.10) and a three-boom drive (2.9). The rear end of the third frame (2.10) passes through the interior of the second frame (2.8), and the three-boom drive (2.9) is connected between the interior of the second frame (2.8) and the third frame (2.10).

4. The vehicle-mounted crane boom for use in low-ceilinged and narrow spaces in coal mines according to claim 1, characterized in that, The first boom (5) includes a first frame (2.3), the top of which has an opening, and a protective cover (2.4) is installed on the opening.

5. The vehicle-mounted crane boom for use in low-ceilinged and narrow spaces in coal mines according to claim 4, characterized in that, The first frame (2.3) has a lighting component at the bottom front end.

6. The vehicle-mounted crane boom for use in low-ceilinged and narrow spaces in coal mines according to claim 1, characterized in that, A rotary reducer (2) for driving the rotary seat (3) to rotate is connected between the rotary seat (3) and the mounting base assembly (1).

7. The vehicle-mounted crane boom for use in low-ceilinged and narrow spaces in coal mines according to claim 6, characterized in that, The rotary reducer (2) is equipped with a self-locking cycloidal motor (2.2) for locking the rotary seat (3).

8. The vehicle-mounted crane boom for use in low-ceilinged and narrow spaces in coal mines according to claim 1, characterized in that, The mounting bracket assembly (1) includes a rotation limiting device (2.1) for limiting the rotation angle of the rotary seat (3).

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