Sliding suspension arm of self-walking crane

Abstract

The invention belongs to the technical field of hoisting mechanical parts, and relates to a sliding suspension arm of a self-walking crane, which comprises a fixed frame, the inner wall of the fixed frame is fixedly connected with a rotating suspension arm, the inside of the rotating suspension arm is fixedly connected with a hydraulic cylinder I, and the output end of the hydraulic cylinder I is fixedly connected with a sliding suspension arm I; the outer wall of the first sliding suspension arm is slidably connected to the inner wall of the rotating suspension arm, and the inner wall of the first sliding suspension arm is slidably connected with a second sliding suspension arm; the inner walls of the two ends of the first sliding suspension arm are fixedly connected with two fixing columns, the outer walls of the fixing columns are rotationally connected with toothed concave wheels, the interior of the first sliding suspension arm is rotationally connected with a toothed transmission belt, and the toothed transmission belt is meshed with the toothed concave wheels; a fixed shaft I is fixedly connected to one side of the outer wall of the toothed transmission belt, one end of the fixed shaft I is fixedly connected to the interior of the rotating suspension arm, a fixed shaft II is fixedly connected to the other side of the outer wall of the toothed transmission belt, and one end of the fixed shaft II is fixedly connected to the interior of the sliding suspension arm II; a protection assembly is arranged in the second sliding suspension arm.

Description

Technical Field

[0001] The invention belongs to the technical field of lifting machinery parts and relates to a sliding boom of a self-propelled crane. Background Art

[0002] Self-propelled crane is a type of crane, which is characterized by being able to move on its own in construction sites, ports, warehouses and other places without the need for additional transportation equipment. The sliding boom is an important part of the self-propelled crane. It is responsible for lifting and transporting objects. The sliding boom is usually made of high-strength steel, such as manganese steel, to withstand various harsh working conditions, such as impact, extrusion and material wear. The structure of the boom can be divided into two parts: the main boom and the auxiliary boom. The main boom usually adopts a truss structure or a box structure, while the auxiliary boom is mainly used to assist the main boom to lift lighter objects.

[0003] The patent with announcement number CN204265329U discloses a telescopic boom structure, which effectively improves the strength of the hydraulic cylinder piston rod, thereby ensuring the safety of the crane. The structure is characterized in that: it includes a middle connecting pipe, telescopic rods are mounted on both ends of the middle connecting pipe, and a double-piston rod cylinder is arranged on the middle connecting pipe. The piston rods of the double-piston rod cylinder are respectively connected to the telescopic rods at both ends. In this application, the telescopic rod is driven to move telescopically by the double-piston rod cylinder. Such a setting has high requirements on the strength of the cylinder piston rod. If the strength of the piston rod is insufficient, it may affect the safety of the crane. Summary of the invention

[0004] In order to make up for the above deficiencies, the present invention provides a sliding boom of a self-propelled crane, aiming to improve the problem that the piston rod strength is insufficient when the boom is extended or retracted, thereby affecting the safety of the crane.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The cam is an internal structure of the cam and is adapted to engage the at least one hydraulic cylinder of the hydraulic cylinder to engage with the camshaft of the hydraulic cylinder to move the camshaft in a direction of rotation.

[0007] Furthermore, the protection component includes a sliding sleeve, and the outer wall of the sliding sleeve is fixedly connected to the inside of the sliding boom 2.

[0008] Furthermore, a hydraulic cylinder 2 is fixedly connected inside the sliding boom 2, and a sliding column is fixedly connected to the output end of the hydraulic cylinder 2.

[0009] Furthermore, one end of the sliding column is fixedly connected to a telescopic rod, and one end of the telescopic rod is fixedly connected to the inner wall of the sliding sleeve.

[0010] Furthermore, a spring is sleeved on the outer wall of the telescopic rod, and one end of the spring is fixedly connected to the inner wall of the sliding sleeve.

[0011] Furthermore, the other end of the spring is fixedly connected to one end of the sliding column, and the outer wall of the sliding column is slidably connected to the inside of the sliding suspension arm 2.

[0012] Furthermore, a rotating rod is fixedly connected inside the second sliding boom, and a clamping block is rotatably connected to the outer wall of the rotating rod.

[0013] Furthermore, the outer wall of the clamping block is slidably connected to the inside of the sliding column and the second sliding suspension arm.

[0014] Beneficial effects of the present invention:

[0015] 1. In the present invention, a hydraulic cylinder for turning on the rotating boom drives the sliding boom to slide inside the rotating boom through its output end, thus achieving a driving effect. Since one side of the toothed transmission belt is fixed to the inner wall of the rotating boom, it rotates between two toothed cams when moving, and then drives the other sliding boom to slide on the inner wall of the sliding boom through the fixed shaft, thereby achieving an effect of gradually extending the boom, solving the problem of insufficient strength of the piston rod affecting the safety of the crane when the boom is extended or retracted, and achieving the effect of gradually extending the boom, thereby reducing the working pressure of the piston rod to a certain extent and improving the safety of the crane.

[0016] 2. In the present invention, the sliding column is pushed to slide inside the boom by the second output end of the hydraulic cylinder, which has a driving effect, and then pushes one end of the clamping block to rotate, so that the other end of the clamping block enters the sliding boom, thereby achieving the effect of fixing the extended boom. In this process, the movement of the sliding column causes the spring to contract under the guidance of the telescopic rod, and the auxiliary hydraulic cylinder returns the sliding column to its original position, thereby driving the clamping block back to the sliding boom, thereby achieving the effect of fixing the boom after extension and extension, making the boom more stable when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the main structure of a sliding boom of a self-propelled crane proposed by the present invention;

[0018] Figure 2 A cross-sectional schematic diagram of a rotating boom of a sliding boom of a self-propelled crane proposed by the present invention;

[0019] Figure 3 The present invention provides a schematic cross-sectional view of a sliding boom of a self-propelled crane.

[0020] In the figure: 1, fixed frame; 2, rotating boom; 3, sliding boom 1; 4, sliding boom 2; 5, hydraulic cylinder 1; 6, fixed column; 7, toothed cam; 8, toothed transmission belt; 9, fixed shaft 1; 10, fixed shaft 2; 11, hydraulic cylinder 2; 12, sliding column; 13, sliding sleeve; 14, rotating rod; 15, block; 16, spring; 17, telescopic rod. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0022] Reference Figure 1-2 The present invention provides an embodiment: a sliding boom of a self-propelled crane, comprising a fixed frame 1, the inner wall of the fixed frame 1 is fixedly connected with a rotating boom 2, the interior of the rotating boom 2 is fixedly connected with a hydraulic cylinder 5, the output end of the hydraulic cylinder 5 is fixedly connected with a sliding boom 3, the outer wall of the sliding boom 3 is slidably connected to the inner wall of the rotating boom 2, the inner wall of the sliding boom 3 is slidably connected with a sliding boom 2 4; the inner walls at both ends of the sliding boom 3 are fixedly connected with two fixing columns 6, the fixing columns 6 The outer wall of the sliding arm 3 is rotatably connected with a toothed cam wheel 7, and the interior of the sliding arm 3 is rotatably connected with a toothed transmission belt 8, and the toothed transmission belt 8 is meshed with the toothed cam wheel 7; one side of the outer wall of the toothed transmission belt 8 is fixedly connected with a fixed shaft 9, and one end of the fixed shaft 9 is fixedly connected to the interior of the rotating arm 2, and the other side of the outer wall of the toothed transmission belt 8 is fixedly connected with a fixed shaft 2 10, and one end of the fixed shaft 2 10 is fixedly connected to the interior of the sliding arm 2 4; a protective component is arranged inside the sliding arm 2 4;

[0023] Specifically, firstly, the hydraulic cylinder 5 inside the rotating boom 2 is started. The function of the hydraulic cylinder 5 is to convert the hydraulic energy into mechanical energy, thereby driving the sliding boom 3 to slide inside the rotating boom 2. This process actually transmits force through the output end of the hydraulic cylinder 5 to make the sliding boom 3 move along the inner wall of the rotating boom 2. The movement of the sliding boom 3 is not carried out alone, but is closely combined with the internal toothed transmission belt 8. The toothed transmission belt 8 is inside the sliding boom 3 and moves with the movement of the boom. It is worth noting that One side of the outer wall of the toothed transmission belt 8 is fixed to the inner wall of the rotating boom 2 by a fixed shaft 9, which means that when the sliding boom 3 drives the toothed transmission belt 8 to move, the toothed transmission belt 8 will rotate between the two toothed cam wheels 7. Next, the rotation of the toothed transmission belt 8 is transmitted to the sliding boom 4 through the fixed shaft 2 10. Since the fixed shaft 2 10 is connected to the sliding boom 4, the rotation of the toothed transmission belt 8 will drive the sliding boom 24 to slide on the inner wall of the sliding boom 3. This process makes the boom as a whole present an elongated effect.

[0024] Reference Figure 3 The protection assembly includes a sleeve 13, the outer wall of the sleeve 13 is fixedly connected to the inside of the sliding arm 24;

[0025] Specifically, the sliding sleeve 13 protects the internal spring 16, thereby achieving a protective effect.

[0026] Reference Figure 3 The interior of the sliding boom 24 is fixedly connected with a hydraulic cylinder 2 11, the output end of the hydraulic cylinder 2 11 is fixedly connected with a sliding column 12, one end of the sliding column 12 is fixedly connected with a telescopic rod 17, one end of the telescopic rod 17 is fixedly connected to the inner wall of the sliding sleeve 13, the outer wall of the telescopic rod 17 is sleeved with a spring 16, one end of the spring 16 is fixedly connected to the inner wall of the sliding sleeve 13, the other end of the spring 16 is fixedly connected to one end of the sliding column 12, the outer wall of the sliding column 12 is slidably connected to the interior of the sliding boom 24, the interior of the sliding boom 24 is fixedly connected with a rotating rod 14, the outer wall of the rotating rod 14 is rotatably connected with a clamping block 15, and the outer wall of the clamping block 15 is slidably connected to the interior of the sliding column 12 and the sliding boom 24;

[0027] Specifically, the hydraulic cylinder 2 11 inside the sliding boom 2 4 is turned on, and the slide column 12 is pushed to slide inside the sliding boom 2 4 through the output end of the hydraulic cylinder 2 11. This process will push one end of the block 15 to rotate on the outer wall of the rotating rod 14, and then drive the other end of the block 15 to rotate to the inside of the sliding boom 1 3, thereby fixing the stretched boom. In this process, the movement of the slide column 12 will drive the spring 16 to contract under the guidance of the telescopic rod 17. The contraction of the spring 16 assists the hydraulic cylinder 2 11 to reset the slide column 12, thereby driving the block 15 back to the inside of the sliding boom 2 4. This action realizes the fixation and release of the boom.

[0028] Working principle: When the sliding boom of the self-propelled crane needs to be used, firstly, the hydraulic cylinder 15 inside the rotating boom 2 is turned on, and the sliding boom 3 is driven to slide inside the rotating boom 2 through the output end of the hydraulic cylinder 15, thereby driving the toothed transmission belt 8 inside the sliding boom 3 to move. Since one side of the outer wall of the toothed transmission belt 8 is fixed to the inner wall of the rotating boom 2 by the fixed shaft 19, the toothed transmission belt 8 rotates between the two toothed cams 7 when moving, and then drives the sliding boom 24 to slide on the inner wall of the sliding boom 3 through the fixed shaft 10, thereby achieving the effect of extending the boom. The hydraulic cylinder 11 in the sliding boom 4 is then turned on, and the slide column 12 is pushed to slide inside the sliding boom 4 through the output end of the hydraulic cylinder 11, thereby pushing one end of the block 15 to rotate on the outer wall of the rotating rod 14, and then driving the other end of the block 15 to rotate to the inside of the sliding boom 3, and fixing the stretched boom. This process is driven by the movement of the slide column 12, so that the spring 16 contracts under the guidance of the telescopic rod 17, and the auxiliary hydraulic cylinder 11 resets the slide column 12, thereby driving the block 15 back to the inside of the sliding boom 4, achieving the effect of fixing and releasing.

Claims

1. A sliding boom of a self-propelled crane, comprising a fixed frame (1), characterized in that: The inner wall of the fixed frame (1) is fixedly connected to a rotating arm (2), the interior of the rotating arm (2) is fixedly connected to a hydraulic cylinder 1 (5), the output end of the hydraulic cylinder 1 (5) is fixedly connected to a sliding arm 1 (3), the outer wall of the sliding arm 1 (3) is slidably connected to the inner wall of the rotating arm (2), and the inner wall of the sliding arm 1 (3) is slidably connected to a sliding arm 2 (4); the inner walls of both ends of the sliding arm 1 (3) are fixedly connected to two fixed columns (6), the outer walls of the fixed columns (6) are rotatably connected to a toothed cam (7), The sliding arm 1 (3) is internally connected to a toothed transmission belt (8), and the toothed transmission belt (8) is meshed with a toothed cam (7); a fixed shaft 1 (9) is fixedly connected to one side of the outer wall of the toothed transmission belt (8), and one end of the fixed shaft 1 (9) is fixedly connected to the inside of the rotating arm (2); a fixed shaft 2 (10) is fixedly connected to the other side of the outer wall of the toothed transmission belt (8), and one end of the fixed shaft 2 (10) is fixedly connected to the inside of the sliding arm 2 (4); a protective component is arranged inside the sliding arm 2 (4).

2. The sliding boom of a self-propelled crane according to claim 1, characterized in that: The protection component comprises a sliding sleeve (13), the outer wall of which is fixedly connected to the interior of the second sliding boom (4).

3. The sliding boom of a self-propelled crane according to claim 2, characterized in that: The interior of the second sliding boom (4) is fixedly connected to a second hydraulic cylinder (11), and the output end of the second hydraulic cylinder (11) is fixedly connected to a sliding column (12).

4. The sliding boom of a self-propelled crane according to claim 3, characterized in that: One end of the sliding column (12) is fixedly connected to a telescopic rod (17), and one end of the telescopic rod (17) is fixedly connected to the inner wall of the sliding sleeve (13).

5. The sliding boom of a self-propelled crane according to claim 4, characterized in that: The outer wall of the telescopic rod (17) is sleeved with a spring (16), and one end of the spring (16) is fixedly connected to the inner wall of the sliding sleeve (13).

6. The sliding boom of a self-propelled crane according to claim 5, characterized in that: The other end of the spring (16) is fixedly connected to one end of the sliding column (12), and the outer wall of the sliding column (12) is slidably connected to the inside of the second sliding boom (4).

7. The sliding boom of a self-propelled crane according to claim 6, characterized in that: The interior of the second sliding suspension arm (4) is fixedly connected with a rotating rod (14), and the outer wall of the rotating rod (14) is rotatably connected with a clamping block (15).

8. The sliding boom of a self-propelled crane according to claim 7, characterized in that: The outer wall of the clamping block (15) is slidably connected to the inside of the sliding column (12) and the second sliding suspension arm (4).

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