Auxiliary hoisting mechanism and hoisting method of front lower protection assembly

Abstract

The present application relates to hoisting equipment technical field, especially to a kind of front lower protective assembly's auxiliary hoisting mechanism and hoisting method.The front lower protective assembly's auxiliary hoisting mechanism includes crossbeam, lifting arm, stand, lifting ring, lifting module and pressure bar.At least two lifting arms are arranged at intervals along the length direction of crossbeam, and at least two lifting arms can support front lower protective assembly.The one end of stand is vertically arranged in the center of the length direction of crossbeam, and the other end is provided with lifting ring.Pressure bar and lifting arm can form fixed frame around front lower protective assembly.Pressure bar is adjustably arranged on lifting module to adjust the width of fixed frame;Lifting module is adjustably arranged on stand to make lifting module drive pressure bar to rise and form lateral opening on fixed frame or pressure bar freely falls with lifting module and presses on front lower protective assembly.The hoisting method of front lower protective assembly can meet the hoisting needs of front lower protective assembly of different sizes, improve hoisting efficiency and versatility.

Description

Technical Field

[0001] This invention relates to the field of hoisting equipment technology, and in particular to an auxiliary hoisting mechanism and hoisting method for a front lower protection assembly. Background Technology

[0002] In the vehicle assembly workshop, the front underrun protection assembly needs to be hoisted to the corresponding assembly position on the chassis. Since different vehicle models have front underrun protection assemblies of different sizes, and the single type of auxiliary device used for hoisting by electric hoists in the assembly workshop is insufficient to meet the diverse hoisting needs, different types of auxiliary devices need to be replaced. This not only increases hoisting costs, but also takes a long time to replace the auxiliary devices, greatly reducing the assembly efficiency of the front underrun protection assembly. Summary of the Invention

[0003] One objective of this invention is to provide an auxiliary lifting mechanism for a front lower protective assembly to meet the lifting requirements of front lower protective assemblies of different sizes, thereby improving lifting efficiency and versatility.

[0004] Another objective of this invention is to provide a method for hoisting a front lower protective assembly, which meets the hoisting requirements of front lower protective assemblies of different sizes, and improves hoisting efficiency and versatility.

[0005] To achieve this objective, the technical solution adopted by the present invention is as follows:

[0006] An auxiliary hoisting mechanism for a front lower guard assembly includes:

[0007] A crossbeam and lifting arms, wherein at least two lifting arms are spaced apart along the length of the crossbeam, and the at least two lifting arms are capable of supporting the front lower guard assembly;

[0008] The column and the lifting ring are provided. One end of the column is vertically set at the center of the crossbeam along its length, and the other end is provided with the lifting ring, which can be attached to the hoisting device.

[0009] The lifting module and the pressure rod, together with the lifting arm, form a fixed frame surrounding the front lower protection assembly. The pressure rod is adjustablely positioned on the lifting module to adjust the width of the fixed frame. The lifting module is vertically mounted on the column so that it can raise the pressure rod and form a lateral opening on the fixed frame, or the pressure rod can fall freely with the lifting module and press against the front lower protection assembly.

[0010] As a preferred embodiment, the lifting module has a through-hole, and the lifting module is slidably sleeved on the column through the through-hole to move up and down on the column.

[0011] As a preferred embodiment, the lifting module includes:

[0012] The main body block has the sliding hole extending through it;

[0013] A sleeve is provided on the main body block along the width direction of the fixed frame; the pressure rod includes a connected horizontal rod and a vertical rod, the horizontal rod is movably inserted into the sleeve, and drives the vertical rod to move closer to or away from the crossbeam, so as to adjust the width of the fixed frame.

[0014] As a preferred embodiment, the lifting module further includes a positioning component. The sleeve has a positioning hole that penetrates its wall thickness. The horizontal rod has multiple positioning slots spaced apart along its length. The positioning hole is selectively coaxially connected to one of the positioning slots. The positioning component is detachably inserted into the coaxially connected positioning hole and the positioning slot.

[0015] As a preferred embodiment, the sleeve is provided on both outer sides of the main body block along the length direction of the crossbeam;

[0016] The pressure bar includes two horizontal bar sections, two vertical bar sections, and two connecting bar sections. One end of the two horizontal bar sections is connected and forms a U-shaped structure. The other end of each horizontal bar section extends toward the end of the crossbeam on its corresponding side and is provided with the connecting bar section. The connecting bar section extends vertically downward to the vertical bar section.

[0017] As a preferred embodiment, the lifting arm is L-shaped and includes a first arm and a second arm. One end of the first arm is disposed on the crossbeam, and the other end of the first arm is vertically connected to the second arm, so that the first arm, the second arm, the horizontal bar portion and the vertical bar portion form the fixed frame.

[0018] As a preferred embodiment, the outer surfaces of the pressure rod and the lifting arm that contact the front lower protection assembly are provided with flexible protective layers or flexible pads.

[0019] A method for hoisting a front lower protective assembly, applied in an auxiliary hoisting mechanism for the aforementioned front lower protective assembly, the method comprising the following steps:

[0020] The auxiliary hoisting mechanism of the front lower protective assembly is moved to the lifting position by the hoisting device;

[0021] Identify the height and width dimensions of the front lower protective assembly to be lifted, located at the lifting position;

[0022] Adjust the position of the pressure bar relative to the lifting module according to the width dimension of the front lower protection assembly, so as to adjust the width of the fixed frame;

[0023] The lifting module is raised according to the height dimension of the front lower protective assembly to form a lateral opening on the fixed frame for the front lower protective assembly to pass through;

[0024] When the front lower protection assembly is placed on the lifting arm, the lifting module is released, and the pressure bar falls freely with the lifting module and presses against the front lower protection assembly;

[0025] The hoisting device moves the front lower protective assembly to the installation position and assembles it through the auxiliary hoisting mechanism of the front lower protective assembly.

[0026] As a preferred option, the height and width dimensions of the front lower protection assembly to be hoisted are identified by direct observation or instrument measurement.

[0027] As a preferred embodiment, after the front lower protective assembly is assembled, the hoisting device lifts the auxiliary hoisting mechanism of the front lower protective assembly away from the assembled front lower protective assembly.

[0028] The beneficial effects of this invention are as follows:

[0029] The auxiliary hoisting mechanism for the front lower protective assembly proposed in this invention consists of a pressure rod and a lifting arm forming a fixed frame surrounding the front lower protective assembly. The pressure rod is adjustablely positioned on a lifting module to adjust the width of the fixed frame. The lifting module raises the pressure rod, allowing the front lower protective assembly to be placed on the lifting arm through a lateral opening in the fixed frame. Simultaneously, the pressure rod falls freely with the lifting module and presses against the front lower protective assembly, thus ensuring the fixed frame firmly holds the assembly. This not only prevents the front lower protective assembly from slipping off the lifting arm, improving the stability and reliability of the hoisting process, but also allows for height and width adjustment of the fixed frame to meet the hoisting requirements of front lower protective assemblies of different sizes, improving hoisting efficiency and versatility.

[0030] The hoisting method for the front lower protective assembly proposed in this invention is applied to the auxiliary hoisting mechanism of the aforementioned front lower protective assembly. The hoisting method for the front lower protective assembly can adjust the width and height of the fixing frame according to the height and width dimensions of the front lower protective assembly to be hoisted. The pressure bar falls freely with the lifting module and presses against the front lower protective assembly, thereby making the fixing frame hold the front lower protective assembly tightly. This not only prevents the front lower protective assembly from slipping off the lifting arm and improves the stability and reliability of the hoisting process, but also meets the hoisting requirements of front lower protective assemblies of different sizes, improving hoisting efficiency and versatility. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the auxiliary hoisting mechanism for the front lower protection assembly provided in an embodiment of the present invention;

[0032] Figure 2 This is a main flowchart of the hoisting method for the front lower protection assembly provided in the embodiments of the present invention;

[0033] Figure 3 This is a detailed flowchart of the hoisting method for the front lower protective assembly provided in an embodiment of the present invention.

[0034] The component names and labels in the diagram are as follows:

[0035] 1. Crossbeam; 2. Lifting arm; 21. First arm; 22. Second arm; 3. Column; 4. Lifting ring; 41. Lifting hole; 5. Lifting module; 51. Main block; 511. Sliding hole; 52. Sleeve; 521. Positioning hole; 6. Pressure rod; 61. Horizontal rod part; 611. Positioning groove; 62. Vertical rod part; 63. Connecting rod part. Detailed Implementation

[0036] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0040] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] Example 1

[0042] In the vehicle assembly workshop, the front underrun protection assembly needs to be hoisted to the corresponding assembly position on the chassis. Since different vehicle models have front underrun protection assemblies of different sizes, and the single type of auxiliary device used for hoisting by electric hoists in the assembly workshop is insufficient to meet the diverse hoisting needs, different types of auxiliary devices need to be replaced. This not only increases hoisting costs, but also takes a long time to replace the auxiliary devices, greatly reducing the assembly efficiency of the front underrun protection assembly.

[0043] To solve the above problems, such as Figure 1 As shown, this embodiment proposes an auxiliary hoisting mechanism for the front lower protective assembly, specifically including a crossbeam 1, a lifting arm 2, a column 3, a lifting ring 4, a lifting module 5, and a pressure rod 6. The crossbeam 1 extends along its length... Figure 1 At least two lifting arms 2 are spaced apart in the left and right directions (within the middle), and at least two lifting arms 2 can support the front lower protective assembly. One end of the column 3 is vertically set at the center of the crossbeam 1 along its length, and the other end is equipped with a lifting ring 4, which can be hooked onto a hoisting device. The pressure rod 6 and the lifting arms 2 can form a fixed frame surrounding the front lower protective assembly. The pressure rod 6 is adjustablely set on the lifting module 5 to adjust the width of the fixed frame; the lifting module 5 is raised and lowered on the column 3 so that the lifting module 5 drives the pressure rod 6 to rise and form a lateral opening on the fixed frame, or the pressure rod 6 falls freely with the lifting module 5 and presses against the front lower protective assembly.

[0044] During the hoisting of the front lower protective assembly, a fixed frame is formed around the front lower protective assembly by the pressure rod 6 and the lifting arm 2. The pressure rod 6 is adjustablely positioned on the lifting module 5 to adjust the width of the fixed frame. The lifting module 5 raises the pressure rod 6 so that the front lower protective assembly can be placed on the lifting arm 2 through the side opening of the fixed frame. At the same time, the pressure rod 6 falls freely with the lifting module 5 and presses against the front lower protective assembly, thereby making the fixed frame hold the front lower protective assembly tightly. This not only prevents the front lower protective assembly from slipping off the lifting arm 2, improving the stability and reliability of the hoisting process, but also allows for height and width adjustment of the fixed frame to meet the hoisting requirements of front lower protective assemblies of different sizes, improving hoisting efficiency and versatility.

[0045] like Figure 1 As shown, the crossbeam 1 is a hollow square steel tube to reduce weight and achieve a lightweight design for the auxiliary lifting mechanism of the front lower protection assembly. There are two lifting arms 2, which are respectively located at the left and right ends of the crossbeam 1. The lifting arms 2 are L-shaped and include a first arm 21 and a second arm 22. One end of the first arm 21 is mounted on the crossbeam 1, and the other end of the first arm 21 is vertically connected to the second arm 22.

[0046] It should be noted that the lifting ring 4 has a lifting hole 41. The lifting ring 4 is hooked onto the hook of the hoisting device through the lifting hole 41, thereby suspending the auxiliary hoisting mechanism of the front lower protection assembly onto the hoisting device. The hoisting device is generally an overhead crane, and the lifting hole 41 of the lifting ring 4 is hooked onto the hook below the electric hoist of the overhead crane.

[0047] like Figure 1 As shown, the lifting module 5 has a through-hole 511, through which it is slidably fitted onto the column 3, allowing it to move up and down on the column 3. The lifting module 5 is raised manually, making operation simple and quick, eliminating the need for an additional mechanical drive structure, thus simplifying the structure of the lifting module 5 and facilitating its installation.

[0048] Furthermore, it should be noted that the outer circumferential surface of the column 3 has a planar cut, making the outer circumferential surface of the column 3 composed of an arc surface and a plane. The inner wall contour of the sliding hole 511 is adapted to the outer circumferential surface of the column 3, so that the installation of the lifting module 5 on the column 3 is directional, while preventing the lifting module 5 from rotating around the circumference of the column 3.

[0049] like Figure 1 As shown, the lifting module 5 includes a main body block 51 and a sleeve 52, with a sliding hole 511 extending through the main body block 51. The sleeve 52 extends along the width direction of the fixed frame ( Figure 1The front and rear directions are arranged on the main body block 51. The pressure rod 6 includes a connected horizontal rod portion 61 and a vertical rod portion 62. The first arm 21, the second arm 22, the horizontal rod portion 61, and the vertical rod portion 62 form a fixed frame. The horizontal rod portion 61 can press against the upper end of the front lower protective assembly, and the vertical rod portion 62 can press against one side of the front lower protective assembly. The horizontal rod portion 61 is movably inserted into the sleeve 52 and moves the vertical rod portion 62 closer to or away from the crossbeam 1 to adjust the width of the fixed frame.

[0050] In this embodiment, sleeves 52 are provided on both outer sides of the main block 51 along the length of the crossbeam 1. The pressure bar 6 includes two horizontal rods 61, two vertical rods 62, and two connecting rods 63. One end of the two horizontal rods 61 is connected and forms a U-shaped structure. The other end of each horizontal rod 61 extends toward the end of the crossbeam 1 on its corresponding side and is provided with a connecting rod 63. The connecting rod 63 extends vertically downward to form a vertical rod 62, so that the pressure plate 6 can form two fixed frames with the two lifting arms 2 respectively, thereby improving the stability and reliability of the front lower protection assembly during the hoisting process. In addition, the two connecting rods 63 extending to the left and right respectively increase the distance between the two fixed frames in the left and right directions, thereby improving the fixing effect on the front lower protection assembly.

[0051] like Figure 1 As shown, the pressure rod 6 is integrally formed by bending, which allows the two horizontal rods 61 to move synchronously in the front-back direction to adjust the width of the two fixed frames in a synchronized manner. This makes the operation simple and improves the adjustment efficiency.

[0052] Furthermore, the lifting module 5 also includes a positioning element (not shown in the figure), and the sleeve 52 has a positioning hole 521 that penetrates its wall thickness, and the horizontal rod 61 extends along its length direction ( Figure 1 Multiple positioning slots 611 are spaced apart in the front-to-back direction. Positioning holes 521 are selectively coaxially connected with one of the positioning slots 611. Positioning components are detachably inserted into the coaxially connected positioning holes 521 and positioning slots 611. When the width of the fixing frame needs to be adjusted, the two positioning components are pulled out from the corresponding positioning holes 521 to unlock the sleeve 52 and the pressure rod 6. Then, according to the width of the front lower protection assembly to be hoisted, the pressure rod 6 is pushed and pulled in the front-to-back direction. When the width of the fixing frame is adjusted to the correct position, one of the positioning slots 611 of each horizontal rod 61 can be coaxially connected with the positioning hole 521 in the corresponding sleeve 52. Then, the positioning components are inserted into the coaxial positioning holes 521 and positioning slots 611 to lock the relative position of the sleeve 52 and the pressure rod 6. This allows the pressure rod 6 to fall freely with the lifting module 5 to the upper end face of the front lower protection assembly, and the vertical rod 62 to press against one side of the front lower protection assembly.

[0053] In this embodiment, the positioning component can be a pin or bolt, as long as it can unlock or lock the sleeve 52 and the pressure rod 6, and no specific limitation is made here.

[0054] It should be noted that flexible protective layers or flexible pads are provided on the outer surfaces of the pressure rod 6 and the lifting arm 2 that contact the front lower protective assembly. These flexible protective layers or pads prevent rigid collisions and friction between the front lower protective assembly and the pressure rod 6 and the lifting arm 2, thus avoiding collision damage to the front lower protective assembly. They also protect the paint layer on the outer surface of the front lower protective assembly, improving its protection, significantly reducing subsequent repair work, and increasing the safety of the hoisting process and the assembly efficiency of the front lower protective assembly. In this embodiment, the flexible protective layer or flexible pad can be a rubber layer, rubber pad, or foam, as long as it effectively protects the front lower protective assembly.

[0055] Example 2

[0056] like Figure 2 As shown, this embodiment proposes a hoisting method for the front lower protective assembly, which is applied to the auxiliary hoisting mechanism of the front lower protective assembly in Embodiment 1. The hoisting method for the front lower protective assembly includes the following steps:

[0057] The auxiliary hoisting mechanism of the front lower protective assembly is moved to the lifting position using a hoisting device;

[0058] Identify the height and width dimensions of the front lower protective assembly to be lifted, located at the lifting position;

[0059] Adjust the position of the pressure bar 6 relative to the lifting module 5 according to the width dimension of the front lower protection assembly to adjust the width of the fixing frame;

[0060] The lifting module 5 is raised according to the height of the front lower protection assembly to form a lateral opening on the fixed frame for the front lower protection assembly to pass through;

[0061] After the lower protection assembly is placed on the lifting arm 2, the lifting module 5 is released, and the pressure bar 6 falls freely with the lifting module 5 and presses against the lower protection assembly.

[0062] The hoisting device moves the front lower protective assembly to the installation position and assembles it through the auxiliary hoisting mechanism of the front lower protective assembly.

[0063] The hoisting method for the front lower protection assembly allows for adjustment of the width and height of the fixing frame according to the height and width dimensions of the front lower protection assembly to be hoisted. The pressure rod 6 falls freely with the lifting module 5 and presses against the front lower protection assembly, thereby making the fixing frame hold the front lower protection assembly tightly. This not only prevents the front lower protection assembly from slipping off the lifting arm 2, improving the stability and reliability of the hoisting process, but also meets the hoisting requirements of front lower protection assemblies of different sizes, improving hoisting efficiency and versatility.

[0064] It should be noted that in this embodiment, the height and width dimensions of the front lower protective assembly to be hoisted are identified by direct observation or instrument measurement.

[0065] Specifically, the hoisting device uses an electric hoist to move the auxiliary hoisting mechanism of the front lower protection assembly to the hoisting position where the front lower protection assembly to be hoisted is placed. There is a transfer vehicle at the hoisting position, and the front lower protection assembly is placed on the transfer vehicle.

[0066] First, identify the height and width dimensions of the front lower protective assembly. Adjust the position of the pressure rod 6 relative to the lifting module 5 according to the identified width dimension. After adjustment, lock the relative position of the sleeve 52 and the pressure rod 6 using the positioning component. Raise the lifting module 5 according to the height dimension of the front lower protective assembly, causing the pressure rod 6 to rise, thus forming a lateral opening on the fixed frame. Operate the electric hoist, extending the second arm 22 between the front lower protective assembly and the transfer carrier. Continue operating the electric hoist to raise the auxiliary lifting mechanism of the front lower protective assembly, so that the front lower protective assembly is mounted on the two second arms 22 and abuts against the first arm 21. Then release the lifting module 5, allowing it and the pressure rod 6 to fall freely until they reach the upper end of the front lower protective assembly. At this point, the horizontal bar 61 presses against the upper end of the front lower protective assembly, and the vertical bar 62 presses against one side of the front lower protective assembly, thus causing the fixed frame to hold the front lower protective assembly tightly. The front lower protection assembly is hoisted to the installation position (usually the chassis assembly position on the vehicle assembly line) according to the specified path, and then installed using bolts and other fasteners according to the assembly process.

[0067] Furthermore, such as Figure 3 As shown, after the lower front protective assembly is assembled, the hoisting device will lift the auxiliary hoisting mechanism of the lower front protective assembly away from the assembled lower front protective assembly, so that the auxiliary hoisting mechanism of the lower front protective assembly can continue to hoist other lower front protective assemblies, thereby realizing cyclic hoisting operations.

[0068] Specifically, after the lower front protective assembly is assembled, the lifting module 5 is raised according to the height of the lower front protective assembly, causing the pressure rod 6 to rise, thereby forming a lateral opening on the fixed frame. By operating the electric hoist, the second arm 22 is lowered to a certain height and detached from the assembled lower front protective assembly. Then, the electric hoist is operated to lift the auxiliary hoisting mechanism of the lower front protective assembly away from the installation position.

[0069] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary hoisting mechanism for a front underguard assembly, characterized by, include: A crossbeam (1) and lifting arms (2), wherein at least two lifting arms (2) are provided at intervals along the length of the crossbeam (1), and at least two lifting arms (2) are capable of supporting the front lower guard assembly; The column (3) and the lifting ring (4) are provided. One end of the column (3) is vertically set at the center of the crossbeam (1) along its length, and the other end is provided with the lifting ring (4). The lifting ring (4) can be attached to the hoisting device. The lifting module (5) and the pressure rod (6) are able to form a fixed frame around the front lower protection assembly with the pressure rod (6) and the lifting arm (2); the position of the pressure rod (6) is adjustable on the lifting module (5) to adjust the width of the fixed frame; the lifting module (5) is raised and lowered on the column (3) so that the lifting module (5) drives the pressure rod (6) to rise and form a lateral opening on the fixed frame or the pressure rod (6) falls freely with the lifting module (5) and presses against the front lower protection assembly; The lifting module (5) has a through hole (511) and is slidably sleeved on the column (3) through the through hole (511) so as to move up and down on the column (3); The lifting module (5) includes: The main body block (51) has the sliding hole (511) through it. Sleeve (52), the sleeve (52) is disposed on the main body block (51) along the width direction of the fixed frame; the pressure rod (6) includes a connected horizontal rod part (61) and a vertical rod part (62), the horizontal rod part (61) is movably inserted into the sleeve (52), and drives the vertical rod part (62) to move closer to or away from the crossbeam (1) to adjust the width of the fixed frame.

2. The secondary hoisting mechanism of a front underguard assembly of claim 1, wherein, The lifting module (5) also includes a positioning component. The sleeve (52) has a positioning hole (521) that penetrates its wall thickness. The horizontal rod (61) has multiple positioning slots (611) spaced apart along its length. The positioning hole (521) is selectively coaxially connected with one of the positioning slots (611). The positioning component is detachably inserted into the coaxially connected positioning hole (521) and the positioning slot (611).

3. The secondary hoisting mechanism of the front underguard assembly of claim 1, wherein, The main body block (51) is provided with sleeves (52) on both opposite outer sides along the length direction of the crossbeam (1); The pressure bar (6) includes two horizontal bar sections (61), two vertical bar sections (62), and two connecting bar sections (63). One end of the two horizontal bar sections (61) is connected and forms a U-shaped structure. The other end of each horizontal bar section (61) extends toward the end of the crossbeam (1) on its corresponding side and is provided with the connecting bar section (63). The connecting bar section (63) extends vertically downward to the vertical bar section (62).

4. The secondary hoisting mechanism of the front underguard assembly of claim 1, wherein, The lifting arm (2) is L-shaped and includes a first arm (21) and a second arm (22). One end of the first arm (21) is disposed on the crossbeam (1), and the other end of the first arm (21) is vertically connected to the second arm (22), so that the first arm (21), the second arm (22), the horizontal bar (61) and the vertical bar (62) form the fixed frame.

5. The auxiliary hoisting mechanism of a front underguard assembly according to any one of claims 1-4, characterized in that, The outer surfaces of the pressure rod (6) and the lifting arm (2) that are in contact with the front lower protection assembly are provided with flexible protective layers or flexible pads.

6. A method of hoisting a front underguard assembly, characterized by, In the auxiliary lifting mechanism applied to the front lower protective assembly according to any one of claims 1 to 5, the lifting method of the front lower protective assembly includes the following steps: The auxiliary hoisting mechanism of the front lower protective assembly is moved to the lifting position by the hoisting device; Identify the height and width dimensions of the front lower protective assembly to be lifted, located at the lifting position; Adjust the position of the pressure bar (6) relative to the lifting module (5) according to the width dimension of the front lower protection assembly, so as to adjust the width of the fixed frame; The lifting module (5) is raised according to the height dimension of the front lower protection assembly to form a lateral opening on the fixed frame for the front lower protection assembly to pass through; When the front lower protection assembly is placed on the lifting arm (2), the lifting module (5) is released, and the pressure rod (6) falls freely with the lifting module (5) and presses against the front lower protection assembly; The hoisting device moves the front lower protective assembly to the installation position and assembles it through the auxiliary hoisting mechanism of the front lower protective assembly.

7. The method of hoisting a front underguard assembly of claim 6, wherein, The height and width dimensions of the front lower protection assembly to be hoisted are identified by direct observation or instrument measurement.

8. The method of hoisting a front underguard assembly of claim 6, wherein, After the front lower protective assembly is assembled, the hoisting device will lift the auxiliary hoisting mechanism of the front lower protective assembly away from the assembled front lower protective assembly.

Images