Quick dismounting and mounting structure and mounting method for drag chain of overhead working truck

Abstract

The invention discloses an overhead working truck drag chain rapid dismounting and mounting structure and mounting method.The overhead working truck drag chain rapid dismounting and mounting structure comprises a rack of a long rod structure, and a moving assembly is arranged at one end of the rack so that the rack can move in an arm frame; the rack is further provided with a jacking assembly which can jack a support at the end of the drag chain and keep the jacking action. The rack is further provided with a fixing assembly which is detachably connected with the tail of the arm support, and the rack is fixed in the moving process of the jacking assembly. The tow chain support is jacked through the jacking assembly, the other end of the tow chain is pushed, the rack can move in the arm frame, and the tow chain is disassembled and assembled. The structure has the functions of automatic jacking and real-time synchronous movement, the structure is supported below the drag chain in the dismounting and mounting process, the structure can be jacked and aligned to the mounting position, the structure can synchronously move along with the drag chain, dismounting and mounting of the drag chain in an arm frame are achieved, the mounting precision is guaranteed, and the quality and safety of an assembled product can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of installation aids, and more specifically, to a rapid disassembly and assembly structure and an installation method of a drag chain for an aerial work vehicle. Background Art

[0002] Spider aerial work vehicles are important tools for aerial work and play an important role in social production activities. However, due to the compact structure of its boom, the internal space is extremely limited, and the gap after assembly is usually only about 5mm, which puts forward extremely high precision requirements for the installation and maintenance of internal components.

[0003] The existing drag chain structure is usually external or arranged in the gap between the arms, but due to the limitation of the internal space of the arm, the disassembly and assembly process of the drag chain is very cumbersome and difficult. Especially during maintenance, it is often necessary to remove all the arms, which not only increases the workload and difficulty, but may also cause damage to the drag chain or other internal parts. When the drag chain structure enters the arm, due to the weight and arm space limitations, the bracket at the front end of the drag chain will naturally support on the upper surface of the bottom drag chain square tube. The existing drag chain disassembly and assembly method usually relies on temporary tools, which is assembled into the support groove in the arm by tilting the internal drag chain bracket and knocking the other end.

[0004] This method is not only time-consuming and laborious, but also easy to damage the drag chain or other internal parts. What's more serious is that in the process of prying up the drag chain, if the operation is not done properly, the worker's arm may be pressed, which poses a great safety hazard.

[0005] Therefore, there is an urgent need for a structure that can realize independent disassembly and assembly of the drag chain, which can not only achieve the purpose of building the drag chain inside the boom to achieve compact layout and protect the drag chain and pipelines, but also can disassemble and assemble the drag chain as a whole without removing parts of the boom to complete the purpose of independent installation and maintenance. Summary of the invention

[0006] In order to solve the above-mentioned technical problems, the present application provides a new type of drag chain installation device, which aims to realize the independent disassembly and assembly of the drag chain inside the arm, so as to achieve the purpose of compact layout and protection of the drag chain and pipelines, and to complete independent installation and maintenance by disassembling and assembling the drag chain as a whole without removing the arm parts.

[0007] The present application provides a rapid disassembly and assembly structure of a drag chain for an aerial work vehicle, and the specific technical scheme is as follows: a frame of a long rod structure, at one end of which a moving assembly is provided, so that the frame can move inside the boom; The frame is also provided with a lifting assembly, which can lift the bracket at the end of the drag chain and maintain the lifting action; The frame is also provided with a fixing assembly which is detachably connected to the tail of the boom and is used to fix the frame during the movement of the lifting assembly; The drag chain bracket is lifted by the lifting assembly, and the other end of the drag chain is pushed, so that the frame can be moved in the arm frame to complete the disassembly and assembly of the drag chain.

[0008] Preferably, a push rod is provided inside the frame, and the push rod moves relative to the frame to transmit power to one end of the moving component to push the lifting component to perform lifting.

[0009] Preferably, the push rod is connected to the frame via a threaded pair, so that the push rod can transmit power to the jacking assembly.

[0010] Preferably, a handwheel is provided on the side of the push rod away from the moving component, and the handwheel is sleeved on the outer surface of the push rod. By rotating the handwheel, the push rod and the frame move relative to each other.

[0011] Preferably, the lifting assembly specifically comprises: a moving slider, a first connecting rod, a second connecting rod, and a supporting block; The movable slider is movable relative to the frame and is connected to one end of the first connecting rod, the other end of the first connecting rod is provided with the supporting block, and one end of the second connecting rod is rotatably connected to the frame and the other end is rotatably connected to the first connecting rod; The first connecting rod is connected to the moving block slider and the supporting block through a mounting shaft; the second connecting rod is connected to the first connecting rod and the frame through a pin shaft; and a retaining spring is also provided on the pin shaft and the mounting shaft.

[0012] Preferably, the first connecting rod and the frame, on which one end of the moving assembly is provided, are arranged at an acute angle.

[0013] Preferably, the fixing assembly specifically includes: a star-shaped handle and a positioning plate; The positioning plate is clamped on the rear part of the boom, and the positioning plate is threadedly connected and fixed to the rear part of the boom through the star-shaped handle.

[0014] Preferably, the positioning assembly is detachably arranged on the frame.

[0015] Preferably, the moving component is a roller.

[0016] At the same time, the present application also provides an installation method using the above-mentioned aerial work vehicle drag chain quick disassembly and assembly structure, and the specific method steps are as follows: S1. Insert the frame from the rear of the arm structure to below the bracket at the end of the drag chain structure, so that the fixing assembly is clamped in the rear of the arm structure and fixed; S2, operate the lifting assembly to rise, and lift the bracket of the tail section of the drag chain mechanism to a height aligned with the support groove; S3, releasing the locking state of the fixed component, pushing the other end of the drag chain, so that the movable component on the frame slides along the drag chain square tube, at this time, the jacking component continues to jack up the bracket at the end of the drag chain structure, completing the disassembly and assembly of the drag chain structure; S4. After the drag chain disassembly and assembly action is complete, the lifting assembly is lowered and the frame is moved out from the tail of the boom structure.

[0017] The aerial work vehicle drag chain quick disassembly and assembly structure provided by the present invention uses a disassembly and assembly structure that can automatically lift and move synchronously in real time in the boom. During the drag chain disassembly and assembly process, the disassembly and assembly structure is supported under the drag chain by matching the actual structural dimensions of the drag chain in the boom, and the installation position is aligned by lifting, and can move synchronously with the drag chain, thereby realizing the fixing or release of the drag chain in the installation groove, which not only ensures the installation accuracy, but also improves the quality and safety of the assembled product.

[0018] Through the implementation of the present invention, the problems of low installation accuracy, difficult disassembly and assembly, and great safety hazards of the drag chain in the prior art can be effectively solved, while the product production efficiency is greatly improved and the product quality of the aerial work vehicle is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the main structure of the aerial work vehicle drag chain quick disassembly and assembly structure in the jacking state provided by an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure viewed from above in the middle jacking state; Figure 3 A schematic diagram of the main structure of the aerial work vehicle drag chain quick disassembly and assembly structure in a retracted state provided by an embodiment of the present invention; Figure 4 for Figure 3 A schematic diagram of the structure from the side in the middle retracted state; Figure 5 It is a structural diagram of the drag chain structure; Figure 6 It is a structural schematic diagram of the boom structure; Figure 7 This is a schematic diagram of the drag chain structure placed on the boom structure for installation; Figure 8 This is a schematic diagram of the S1 step state of the aerial work vehicle drag chain quick disassembly and assembly structure; Fig. 9 This is a schematic diagram of the status of step S2 of the aerial work vehicle drag chain quick disassembly and assembly structure; Fig.10 This is a schematic diagram of the S3 and S4 steps of the aerial work vehicle drag chain quick disassembly and assembly structure.

[0021] Reference numerals The structure of the aerial work vehicle drag chain quick disassembly and assembly: 1. Moving assembly; 2. Roller shaft; 3. Circlip; 4. First connecting rod; 5. Support block; 6. Pin shaft; 7. Second connecting rod; 8. Mounting shaft; 9. First locking nut; 10. Moving slider; 11. Push rod; 12. Frame; 13. Positioning plate; 14. Star handle; 15. Handwheel; 16. Second locking nut; Drag chain structure: 17, fixing bolts; 18, drag chain slot; 19, two telescopic arm drag chain; 20, drag chain square tube; 21, bracket fixing bolts; 22, drag chain square tube bracket; 23, basic arm drag chain; 24, bracket; Boom structure: 25. three telescopic arms; 26. two telescopic arms; 27. one telescopic arm; 28. basic arm; 29. ​​sliding structure; 30. telescopic structure; 31. support groove; 32. support tube. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0026] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0027] This specific embodiment of the present invention is written in a progressive manner.

[0028] like Figures 5 to 7 As shown in the boom structure of the aerial work vehicle, Figures 5 to 7 As shown in the figure, in the aerial work vehicle, the drag chain structure and the boom structure play an important role in extension and contraction, and their specific components include: like Figure 5 As shown, the drag chain structure includes: fixing bolts 17, drag chain grooves 18, two telescopic arm drag chains 19, drag chain square tubes 20, bracket fixing bolts 21, drag chain square tube brackets 22, basic arm drag chains 23, and brackets 24; Usually, the drag chain structure is assembled independently outside the boom structure, and then the drag chain structure is installed into the boom frame as a whole. The drag chain slot 18 is inserted into the support slot 31 in the three telescopic arms 25, and then fixed by the fixing bolts 17, the bracket fixing bolts 21, and the drag chain square tube bracket 22 to complete the installation of the drag chain structure; similarly, during maintenance, the fixing bolts 17, the bracket fixing bolts 21, and the drag chain square tube bracket 22 are first removed in the reverse order, and then the drag chain slot 18 is dragged out of the support slot 31 of the boom structure, and the drag chain structure can be taken out of the boom structure as a whole, which is convenient for maintenance and replacement; like Figure 6As shown, the boom structure includes: three telescopic arms 25, two telescopic arms 26, one telescopic arm 27, a basic arm 28, a sliding structure 29, a telescopic structure 30, a support groove 31, and a support tube 32; The boom structure is composed of three telescopic arms 25, two telescopic arms 26, one telescopic arm 27, a basic arm 28, a sliding structure 29, and a telescopic structure 30. First, install each section of the boom structure into the sliding block structure 29, and install pulleys and chains, etc. to complete the assembly of the telescopic structure 30. According to the position relationship between each other, the basic arm 28, the first telescopic arm 27, the second telescopic arm 26, and the third telescopic arm 25 are inserted into the boom in the order of the position requirements of the drawing to form a complete boom structure. However, in actual installation, when installing it into the boom structure, Figure 7 As shown, when the drag chain structure enters the boom structure, due to the weight and boom space restrictions, the bracket 24 located at the front end of the second telescopic arm drag chain 19 will naturally support on the upper surface of the drag chain square tube 20. At this time, there is a large difference in height between the bracket 24 and the support groove 31 in the third telescopic arm 25. At the same time, the support tube 32 at the tail of the boom structure affects the assembly space. At the same time, the tail of the boom structure is about 500mm away from the bracket. The internal space of the boom structure is small, and there is no suitable tool and operation space, so the drag chain structure cannot be smoothly fixed on the support groove 31 in the boom structure. Therefore, an embodiment of the present invention provides a rapid disassembly and assembly structure of a drag chain of an aerial work vehicle, which is used to lift and install the drag chain in the boom structure, and mainly includes: like Figures 1 to 4 As shown, in this embodiment, in order to enable the disassembly and assembly structure to extend into the boom structure to lift the drag chain structure, a frame 12 of a long rod structure is provided in this embodiment, and a moving component 1 is provided at one end thereof, so that the frame 12 can move inside the boom structure, and is convenient for being detachably plugged into the tail of the boom structure, and then lifting the drag chain structure inside it; The frame 12 is also provided with a lifting assembly, which can lift the bracket of the end structure of the drag chain and maintain the lifting action. Specifically, in this embodiment, the bracket 24 located at the front end of the second telescopic arm drag chain 19 is lifted to maintain the same height as the support groove 31 in the arm structure; The frame 12 is also provided with a fixing assembly, which is detachably connected to the rear of the boom structure. During the movement of the lifting assembly, the frame 12 is fixed. Specifically, in this embodiment, the frame 12 is positioned and fixed by cooperating with the support pipe in the boom structure. This embodiment implements the installation of the drag chain specifically, by lifting and holding the drag chain bracket through the lifting component, releasing the fixation of the fixing component, pushing the other end of the drag chain, so that the frame 12 can be moved in the arm structure, and the drag chain component is moved to complete the disassembly and assembly of the drag chain.

[0029] Preferably, in this embodiment, the internal structure of the frame 12 is defined as follows: Figure 1 and Figure 3 As shown, in order to achieve the force transmission effect on the jacking assembly, a mechanical structure transmission method is adopted in this embodiment, and a push rod 11 is also provided inside the frame 12. Through the relative movement of the push rod 11 and the frame 12, the power is transmitted to the jacking assembly at one end of the moving assembly 1 to provide power for its jacking.

[0030] Furthermore, in this embodiment, the connection relationship between the push rod 11 and the frame 12 is further limited. In order to better transmit power mechanically, in this embodiment, the push rod 11 and the frame 12 are connected through a threaded pair. Specifically, the outer surface of the push rod 11 is provided with an external thread, and the frame 12 is provided with a corresponding internal thread. The threaded pair is matched and connected for transmission, so that the push rod 11 can transmit power to the jacking assembly while rotating and advancing.

[0031] Furthermore, in order to facilitate the operator to rotate the push rod 11 to transmit power, as shown in FIG. Figures 1 to 4 As shown, in this embodiment, the push rod 11 is provided with a hand wheel 15 at one end of the moving assembly 1 in the yard; And, such as Figure 5 and Figure 7 As shown, the push rod 11 is close to the end of the moving assembly 1 and is fixed to the frame 12 through the first locking nut 9; the push rod 11 is away from the end of the moving assembly 1 and is fixed to the hand wheel 15 through the second locking nut 16; Especially Figure 4 As shown, the handwheel 15 is sleeved on the outer surface of the push rod 11. The setting of the handwheel 15 brings convenience to the operation of the operator. The operator rotates the handwheel 15, specifically clockwise in this embodiment, so that the push rod 11 can move relative to the frame 12 to raise the jacking assembly.

[0032] Preferably, in this embodiment, the specific structure of the lifting assembly is further defined as follows: Figure 1 and Figure 3 As shown, in this embodiment, the lifting assembly specifically includes: a moving slider 10, a first connecting rod 4, a second connecting rod 7, and a supporting block 5; The movable slider 10 can move relative to the frame 12. Specifically, in this embodiment, the movable slider 10 is connected to the push rod 11 and connected to one end of the first connecting rod 4. Figures 1 to 3As shown, the other end of the first connecting rod 4 is provided with the supporting block 5 as a lifting component contacting with the bracket of the drag chain, one end of the second connecting rod is rotatably connected to the frame 12, and the other end is rotatably connected to the first connecting rod 4 to form a connecting rod mechanism. Under the push of the push rod 11, the supporting block 5 moves in the height direction; At the same time, in order to ensure smooth movement and a stable structure in the connecting rod mechanism, in the present embodiment, the first connecting rod 4 is connected to the moving block slider and the supporting block 5 via the mounting shaft 8; the second connecting rod 7 is connected to the first connecting rod 4 and the frame 12 via the pin shaft 6, so that the rotation between them can be smoother; and a retaining spring 3 is also provided on the pin shaft 6 and the mounting shaft 8, and the retaining spring 3 keeps the pin shaft 6 and the mounting shaft 8 fixed in the axial direction to avoid axial movement.

[0033] Furthermore, the movement direction of the lifting assembly is further limited, such as Figure 1 and Figure 3 As shown, in this embodiment, the first connecting rod 4 is designed to be inclined at an angle to the frame 12. In order to better lift the bracket of the drag chain assembly, when the first connecting rod 4 and one end of the frame 12 where the moving assembly 1 is provided are arranged at an acute angle, less power is required for the lifting assembly and the lifting structure is safer and more solid.

[0034] As a preference, in this embodiment, the specific structure of the fixing assembly is further defined as follows: Figure 1 As shown, the specific structure of the fixing assembly includes: a star-shaped handle 14, a positioning plate 13; The positioning plate is clamped on the tail of the boom, and the positioning plate is threadedly connected and fixed to the tail of the boom through the star-shaped handle 14. The positioning plate 13 is just clamped on the support tube at the tail of the boom for positioning. Then the star handle 14 is used to lock the positioning plate 13 in the threaded hole of the support tube at the tail of the boom to prevent relative movement between the frame 12 and the drag chain structure.

[0035] Furthermore, the installation form of the fixing assembly is further limited, in order to realize the installation of the drag chain structure with different arm structures, such as Figure 3 As shown, in this embodiment, the fixing assembly is detachably arranged on the frame 12 to cope with the support tube 32 at the tail of different boom structures, which can facilitate positioning.

[0036] Preferably, in this embodiment, the moving component 1 is further defined as follows: Figure 1 and Figure 3As shown, in this embodiment, the moving component 1 is specifically a roller, and the roller is connected to the frame 12 through a roller shaft 2. Specifically, there are four groups of rollers, which are distributed at one end of the frame 12 to facilitate movement inside the arm structure.

[0037] At the same time, the present application also provides a method for using the aerial work vehicle drag chain quick disassembly and assembly structure provided by this embodiment, and combines Figures 8 to 10 The specific installation steps are as follows: S1, insert the frame 12 from the rear of the boom structure to below the bracket 24 at the end of the drag chain structure, so that the fixing assembly is clamped in the rear of the boom structure and fixed; S2, operate the lifting assembly to rise, and lift the bracket 24 of the tail section of the drag chain mechanism to a height aligned with the support groove 31; S3, releasing the locking state of the fixed component, pushing the other end of the drag chain structure, so that the moving component 1 on the frame 12 slides along the drag chain square tube 20, at this time, the lifting component continues to lift the bracket 24 of the tail section of the drag chain structure, completing the disassembly and assembly of the drag chain structure; S4. After the drag chain disassembly and assembly action is complete, the lifting assembly is lowered and the frame 12 is moved out from the tail of the boom structure.

[0038] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A quick disassembly and assembly structure of a drag chain for an aerial work vehicle, which can be detachably plugged into the tail of the boom structure, characterized in that: include: The frame of the long rod structure has a moving assembly at one end thereof, so that the frame can move inside the boom; The frame is also provided with a lifting assembly, which can lift the bracket at the end of the drag chain and maintain the lifting action; The frame is also provided with a fixing assembly which is detachably connected to the tail of the boom and is used to fix the frame during the movement of the lifting assembly; The drag chain bracket is lifted by the lifting assembly, and the other end of the drag chain is pushed, so that the frame can be moved in the arm frame to complete the disassembly and assembly of the drag chain.

2. The aerial work vehicle drag chain quick disassembly and assembly structure according to claim 1 is characterized in that: A push rod is arranged inside the frame, and the push rod moves relative to the frame to transmit power to one end of the moving component to push the lifting component to lift.

3. The aerial work vehicle drag chain quick disassembly and assembly structure according to claim 2 is characterized in that: The push rod is connected to the frame via a threaded pair, so that the push rod can transmit power to the jacking assembly.

4. The aerial work vehicle drag chain quick disassembly and assembly structure according to claim 3 is characterized in that: The push rod is provided with a hand wheel on a side away from the moving assembly. The hand wheel is sleeved on the outer surface of the push rod. By rotating the hand wheel, the push rod and the frame move relative to each other.

5. The aerial work vehicle drag chain quick disassembly and assembly structure according to claim 1 is characterized in that: The lifting assembly specifically comprises: a moving slider, a first connecting rod, a second connecting rod, and a supporting block; The movable slider is movable relative to the frame and is connected to one end of the first connecting rod, the other end of the first connecting rod is provided with the supporting block, and one end of the second connecting rod is rotatably connected to the frame and the other end is rotatably connected to the first connecting rod; The first connecting rod is connected to the moving block slider and the supporting block through a mounting shaft; the second connecting rod is connected to the first connecting rod and the frame through a pin shaft; and a retaining spring is also provided on the pin shaft and the mounting shaft.

6. The aerial work vehicle drag chain quick disassembly and assembly structure according to claim 5, characterized in that: The first connecting rod and the frame, at an end where the moving assembly is provided, are arranged at an acute angle.

7. The aerial work vehicle drag chain quick disassembly and assembly structure according to claim 1, characterized in that: The fixing assembly specifically includes: a star-shaped handle and a positioning plate; The positioning plate is clamped on the rear part of the boom, and the positioning plate is threadedly connected and fixed to the rear part of the boom through the star-shaped handle.

8. The aerial work vehicle drag chain quick disassembly and assembly structure according to claim 7, characterized in that: The positioning assembly is detachably arranged on the frame.

9. The aerial work vehicle drag chain quick disassembly and assembly structure according to any one of claims 1 to 8, characterized in that: The moving component is specifically a roller.

10. A method for installing a rapid disassembly and assembly structure of a drag chain of an aerial work vehicle, using the rapid disassembly and assembly structure of a drag chain of an aerial work vehicle as claimed in any one of claims 1 to 9, characterized in that: The specific steps are as follows: S1. Insert the frame from the rear of the arm structure to below the bracket at the end of the drag chain structure, so that the fixing assembly is clamped in the rear of the arm structure and fixed; S2, operate the lifting assembly to rise, and lift the bracket of the tail section of the drag chain mechanism to a height aligned with the support groove; S3, releasing the locking state of the fixed component, pushing the other end of the drag chain, so that the movable component on the frame slides along the drag chain square tube, at this time, the jacking component continues to jack up the bracket at the end of the drag chain structure, completing the disassembly and assembly of the drag chain structure; S4. After the drag chain disassembly and assembly action is complete, the lifting assembly is lowered and the frame is moved out from the tail of the boom structure.

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