Aerial work platform frame assembly tool

Abstract

The invention discloses an aerial work platform frame assembly tool which comprises an assembly platform, a rear axle centering mechanism, a side plate clamping mechanism, a seat ring positioning mechanism, a middle partition plate positioning mechanism and a front partition plate positioning mechanism, wherein the rear axle centering mechanism, the side plate clamping mechanism, the seat ring positioning mechanism, the middle partition plate positioning mechanism and the front partition plate positioning mechanism are arranged on the platform. The rear axle centering mechanism is used for supporting, centering and clamping a frame rear axle structure, the side plate clamping mechanism is used for supporting, positioning and clamping a side plate assembly, the seat ring positioning mechanism is used for carrying out height supporting and centering clamping on a frame seat ring assembly, and the middle partition plate positioning mechanism is used for supporting, clamping and positioning a middle partition plate assembly. The front partition plate positioning mechanism positions the front partition plate assembly. According to the method, the potential safety hazard and the efficiency bottleneck in the assembling process of the aerial work platform frame are effectively solved. Operators do not need to frequently operate hoisting equipment, so that the risk of falling objects from high altitudes is reduced; positioning of all parts is automatically completed through a mechanical mechanism, and the assembling operation time is shortened; the positioning precision is guaranteed by a mechanical structure, and the assembly consistency is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of aerial work platform manufacturing, and particularly to an assembly tool for the frame of an aerial work platform. Background Art

[0002] As an important device for modern aerial work, the manufacturing quality of the frame structure of the articulated boom aerial work platform directly affects the overall performance and use safety of the machine. There are many technical defects in the traditional frame assembly process: First, the manual assembly method requires frequent use of a crane to lift workpieces, which not only poses safety hazards but also leads to cumbersome processes and long time consumption; Second, it is difficult to guarantee the accuracy of manual measurement and positioning, which is likely to cause dimensional deviation in frame assembly; Third, the traditional process cannot achieve synchronous positioning and clamping of multiple workpieces, resulting in low assembly efficiency. Especially when dealing with the rear axle structure, side plate components, seat ring components, and various partition components of the frame, the existing technology lacks a systematic positioning and clamping scheme, and it is difficult to accurately control the relative position relationship between components. In addition, the traditional tooling lacks adjustability and cannot meet the assembly requirements of frames of different specifications, seriously affecting production flexibility. These technical defects lead to unstable frame assembly quality and low production efficiency, restricting the improvement of the manufacturing level of aerial work platforms. Summary of the Invention

[0003] In view of this, the present invention provides an assembly tool for the frame of an aerial work platform, which can realize automatic assembly of the frame of the aerial work platform, improve production efficiency, reduce safety risks, and has good product consistency.

[0004] To achieve the above object, the present invention provides the following technical solutions: An assembly tool for the frame of an aerial work platform, comprising: an assembly platform and a rear axle centering mechanism, a side plate clamping mechanism, a seat ring positioning mechanism, a middle partition positioning mechanism, and a front partition positioning mechanism provided on the platform.

[0005] Among them, the rear axle centering mechanism supports and centers and clamps the rear axle structure of the frame, the side plate clamping mechanism supports, positions, and clamps the side plate components, the seat ring positioning mechanism provides height support and centering clamping for the seat ring components of the frame, the middle partition positioning mechanism supports, clamps, and positions the middle partition components, and the front partition positioning mechanism positions the front partition components.

[0006] Preferably, the seat ring positioning mechanism includes a base and a support positioning shaft and a pneumatic three-jaw chuck installed on the base. The support positioning shaft provides height support for the seat ring components of the frame, and the pneumatic three-jaw chuck provides centering clamping for the seat ring components of the frame.

[0007] Preferably, four support positioning shafts are provided, and the four support positioning shafts are respectively arranged at the four corners of the base.

[0008] Preferably, a groove extending along the front-to-back direction is provided on the assembly platform, and the seat ring positioning mechanism and the middle partition positioning mechanism are both installed in the groove.

[0009] Preferably, the middle partition positioning mechanism includes a first linear guide, a first servo motor, a second servo motor, a first middle partition support backer and a second middle partition support backer, the first middle partition support backer and the second middle partition support backer are both slidably connected to the first linear guide and arranged relatively to each other, the first servo motor and the second servo motor are respectively arranged on the back sides of the first middle partition support backer and the second middle partition support backer and are respectively transmission connected to the back sides of the first middle partition support backer and the second middle partition support backer.

[0010] Preferably, the seat ring positioning mechanism is arranged between the first middle partition plate supporting backer and the second middle partition plate supporting backer and is slidably connected to the first linear guide rail through the base.

[0011] Preferably, two first linear guide rails are provided, and the two first linear guide rails are arranged in parallel and spaced apart in the groove, and the first servo motor and the second servo motor are both arranged between the two first linear guide rails.

[0012] Preferably, the middle partition plate positioning mechanism also includes an electro-permanent magnetic suction cup, which is arranged in pairs and a plurality of pairs are provided, and each pair of the electro-permanent magnetic suction cups is respectively installed on opposite surfaces of the first middle partition plate support backing and the second middle partition plate support backing and arranged correspondingly.

[0013] Preferably, the rear axle centering mechanism includes a driving motor, a forward and reverse screw, a second linear guide, a first rear axle support frame, a second rear axle support frame, a first rear axle support backer and a second rear axle support backer; the first rear axle support backer and the second rear axle support backer are both slidably connected to the second linear guide and are arranged relatively to each other, the first rear axle support frame and the second rear axle support frame are both arranged between the first rear axle support backer and the second rear axle support backer and are symmetrically spaced apart, the two ends of the forward and reverse screws are respectively transmission-connected to the bottom of the first rear axle support backer and the second rear axle support backer, and the driving motor is transmission-connected to one end of the forward and reverse screws.

[0014] Preferably, the rear axle centering mechanism further includes a tapered pin, and two tapered pins are provided, and the two tapered pins are arranged relatively on opposite surfaces of the first rear axle support backer and the second rear axle support backer.

[0015] Preferably, there are two sets of the second linear guide rails, which are symmetrically arranged. Each set includes two second linear guide rails arranged in parallel and symmetrically. The two sets of second linear guide rails are respectively slidably connected to the first rear axle support backing and the second rear axle support backing, and the positive and negative lead screws are arranged between the two sets of second linear guide rails.

[0016] Preferably, the side plate clamping mechanism includes a first side plate clamping mechanism and a second side plate clamping mechanism symmetrically arranged on the left and right sides of the butt joint platform. The first side plate clamping mechanism and the second side plate clamping mechanism can push the side plates to move towards the middle of the two.

[0017] Preferably, both the first side plate clamping mechanism and the second side plate clamping mechanism are composed of a support base, a telescopic oil cylinder and an adjustable pressure head. The telescopic oil cylinder and the adjustable pressure head form an adjustment assembly. First mounting holes and second mounting holes are vertically distributed on the base, and the two adjustment assemblies are respectively installed at the first mounting holes and the second mounting holes. Among them, the telescopic oil cylinder and the adjustable pressure head are respectively arranged on the outer side and the inner side of the base.

[0018] Preferably, the first side plate clamping mechanism and the second side plate clamping mechanism are arranged in pairs, and multiple pairs of side plate clamping mechanisms are evenly spaced in the front-rear direction and arranged on the butt joint platform.

[0019] Preferably, the front partition positioning mechanism includes a third linear guide rail, a positioning support and a positioning shaft. The positioning support is slidably connected to the third linear guide rail, and a positioning hole is provided on the positioning support. When the front partition assembly is placed on the positioning support, the positioning shaft is used to sequentially pass through the positioning holes on the front partition assembly and the positioning holes on the positioning support to complete the positioning of the front partition assembly.

[0020] The beneficial effects of the present invention are as follows: Compared with the prior art, the present application effectively solves the safety hazards and efficiency bottlenecks in the process of assembling the aerial work platform vehicle frame. The operator does not need to frequently operate the hoisting equipment, reducing the risk of falling objects from a height; the positioning of each component is automatically completed by a mechanical mechanism, shortening the assembly operation time; the positioning accuracy is guaranteed by the mechanical structure, significantly improving the assembly consistency. Especially in the positioning stage before the vehicle frame welding, this tooling can ensure the coaxiality of key components such as the rear axle and the seat ring, providing an accurate assembly reference for the subsequent welding process.

[0021] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a structural schematic diagram of the butt joint tooling of the present invention; Figure 2 is a schematic structural view of the rear axle centering mechanism of the present invention; Figure 3 is a schematic structural view of the side plate clamping mechanism of the present invention; Figure 4 is a schematic structural view of the seat ring positioning mechanism of the present invention; Figure 5 is a schematic structural view of the middle partition board positioning mechanism of the present invention; Figure 6 is a schematic structural view of the front partition board positioning mechanism of the present invention; Figure 7 is a schematic structural view of the frame of the aerial work platform of the present invention; Figure 8 is an exploded view of the frame of the aerial work platform of the present invention.

[0023] Reference numerals: 1, assembly platform; 11, groove; 2, rear axle centering mechanism; 21, drive motor; 22, positive and negative lead screw; 23, second linear guide; 24, first rear axle support frame; 25, second rear axle support frame; 26, first rear axle support backing; 27, second rear axle support backing; 28, taper pin; 3, side plate clamping mechanism; 31, first side plate clamping mechanism; 32, second side plate clamping mechanism; 33, support base; 34, telescopic oil cylinder; 35, adjustable pressure head; 4, seat ring positioning mechanism; 41, base; 42, support positioning shaft; 43, pneumatic three-jaw chuck; 5, middle partition board positioning mechanism; 51, first linear guide; 52, first servo motor; 53, second servo motor; 54, first middle partition board support backing; 55, second middle partition board support backing; 56, electro-permanent magnetic chuck; 6, front partition board positioning mechanism; 61, third linear guide; 62, positioning support; 63, positioning shaft; 7, rear axle structure; 8, first side plate assembly; 9, second side plate assembly; 10, seat ring assembly; 11, first middle partition board assembly; 12, second middle partition board assembly; 13, front partition board assembly. Detailed implementation manners

[0024] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] Reference below Figures 1 to 8 The aerial work platform frame assembly tooling in the embodiment of the present invention is described.

[0027] The embodiment of the present application discloses an aerial work platform frame assembly tool, including: an assembly platform 1 and a rear axle centering mechanism 2, a side panel clamping mechanism 3, a seat ring positioning mechanism 4, a middle partition positioning mechanism 5 and a front partition positioning mechanism 6 arranged on the platform.

[0028] Among them, the rear axle centering mechanism 2 supports and center-clamps the frame rear axle structure 7, the side panel clamping mechanism 3 supports, positions and clamps the side panel assembly, the seat ring positioning mechanism 4 height-supports and center-clamps the frame seat ring assembly 10, the middle partition positioning mechanism 5 supports, clamps and positions the middle partition assembly, and the front partition positioning mechanism 6 positions the front partition assembly 13.

[0029] Specifically, the assembly platform 1 refers to the basic plane that supports each positioning mechanism, which can be formed by welding thickened steel plates with horizontal and vertical channels, and the flatness of the positioning reference surface is ensured by plane processing. The rear axle centering mechanism 2 refers to a positioning device with a two-way synchronous clamping function. The side panel clamping mechanism 3 is a clamping device with supporting, positioning and clamping functions. The seat ring positioning mechanism 4 refers to a composite clamping device that integrates height support and radial clamping. The middle partition positioning mechanism 5 refers to a device with positioning and clamping functions. The front partition positioning mechanism 6 is a device with a positioning function.

[0030] In the prior art, the aerial work platform frame assembly process has long relied on manual operation, and operators need to frequently use a crane to lift components to the welding platform for positioning and adjustment. There are three significant defects in the traditional operation mode: first, there is a risk of falling objects from high altitude during the manual lifting of components, which threatens the safety of operators; second, the positioning of each component requires repeated measurement and calibration, which leads to a longer assembly cycle; third, the fluctuation of manual operation accuracy leads to poor consistency of welded products, affecting the strength of the frame structure. Especially in the assembly process of large frames, operators need to coordinate the spatial positioning of components such as the rear axle, side panels, and seat rings at the same time, which is prone to accumulation of positioning deviations.

[0031] The jig for assembling the aerial work platform frame of the present application can effectively solve the problems in the above-mentioned prior art. The specific implementation method is as follows: A assembly platform 1 is set as the installation reference for each positioning mechanism, and the reference error of component installation is eliminated by controlling the plane accuracy. The rear axle centering mechanism 2 is used to realize the automatic centering of the rear axle structure 7 and eliminate the position deviation caused by manual adjustment. While supporting the weight of the side plate, the side plate clamping mechanism 3 applies symmetric clamping forces to ensure the parallel positioning of the side plate assembly. The seat ring positioning mechanism 4 can define the installation height of the seat ring and achieve precise positioning in the circumferential direction. The middle partition positioning mechanism 5 can fix the position of the partition. The front partition positioning mechanism 6 can achieve the rapid positioning of the front partition. The spatial layout of each mechanism on the assembly platform 1 forms a three-dimensional positioning system, and the collaborative positioning of each component of the frame is completed through mechanical linkage.

[0032] Compared with the prior art, this technical solution has achieved three key improvements: First, it replaces the scattered manual operations with an integrated positioning system and transforms the assembly process into a mechanical linkage process; Second, a unified positioning reference platform is established to avoid the error accumulation caused by the reference conversion in multiple processes; Third, special positioning mechanisms are developed to achieve the automatic centering and clamping of key components and eliminate the subjective errors caused by manual adjustment. The hoisting, measuring, and adjusting processes that need to be carried out step by step in the traditional process are integrated into a mechanical positioning process that is executed synchronously.

[0033] Through the above technical solution, the present application effectively solves the safety hazards and efficiency bottlenecks in the process of assembling the aerial work platform frame. The operator does not need to frequently operate the hoisting equipment, reducing the risk of falling objects from height; the positioning of each component is automatically completed by mechanical mechanisms, shortening the assembly operation time; the positioning accuracy is guaranteed by the mechanical structure, significantly improving the assembly consistency. Especially in the positioning stage before the frame welding, this jig can ensure the coaxiality of key components such as the rear axle and the seat ring, providing an accurate assembly reference for the subsequent welding process.

[0034] In some embodiments, for example Figure 1 and Figure 4 as shown, the seat ring positioning mechanism 4 includes a base 41, a support positioning shaft 42 and a pneumatic three-jaw chuck 43 installed on the base 41. The support positioning shaft 42 provides height support for the frame seat ring assembly 10, and the pneumatic three-jaw chuck 43 performs centering clamping on the frame seat ring assembly 10. There are four support positioning shafts 42, and the four support positioning shafts 42 are arranged at the four corners of the base 41. Among them, the support positioning shaft 42 can provide rigid support in the vertical direction and restrict the height degree of freedom of the seat ring assembly 10 through the axial contact surface. The pneumatic three-jaw chuck 43 has a radial clamping device with three synchronously moving jaws, and forms a centering clamping force through the centripetal movement of the three jaws.

[0035] Specifically, the base 41 is fixed on the assembly platform 1 as an installation reference surface, and the four support positioning shafts 42 are placed at the four corners of the base 41 to form a rectangular support array. The top ends of the four shafts are ensured to be in the same horizontal plane through mechanical processing. When the seat ring assembly 10 is placed on the top of the support positioning shaft 42, its bottom surface forms a surface contact constraint with the four support points to eliminate the vertical displacement deviation. The pneumatic three-jaw chuck 43 is installed at the center of the base 41. After receiving the clamping signal, the three jaws synchronously shrink radially toward the center to clamp the outer circumference of the seat ring assembly 10, and force the correction of the seat ring axis to coincide with the center axis of the base 41 through three-point contact. The support positioning shaft 42 and the pneumatic three-jaw chuck 43 work together to complete the height direction positioning and radial centering clamping, respectively, to form a three-dimensional space constraint.

[0036] Through the above technical scheme, the present application realizes the synchronous operation of the height support and centering clamping of the seat ring assembly 10, the support positioning shaft 42 array forms a rigid height constraint to prevent the workpiece from tilting, and the pneumatic three-jaw chuck 43 automatically corrects the center position through three-point synchronous clamping, solving the problems of insufficient manual positioning accuracy and poor clamping stability.

[0037] In some embodiments, for example Figure 1 As shown, a groove 11 extending along the front-back direction is provided on the assembly platform 1, and the seat ring positioning mechanism 4 and the middle partition positioning mechanism 5 are both installed in the groove 11. Among them, the groove 11 can be realized by a long strip groove formed by milling or welding, and its function is to provide a moving reference and installation interface for the positioning mechanism.

[0038] Furthermore, the middle partition positioning mechanism 5 includes a first linear guide rail 51, a first servo motor 52, a second servo motor 53, a first middle partition support backer 54 and a second middle partition support backer 55. The first middle partition support backer 54 and the second middle partition support backer 55 are both slidably connected to the first linear guide rail 51 and are relatively arranged. The first servo motor 52 and the second servo motor 53 are respectively arranged on the back sides of the first middle partition support backer 54 and the second middle partition support backer 55 and are respectively transmission connected to the back sides of the first middle partition support backer 54 and the second middle partition support backer 55.

[0039] Specifically, when positioning the middle partition plate assembly, the first servo motor 52 and the second servo motor 53 respectively drive the first middle partition plate support backing 54 and the second middle partition plate support backing 55 to move towards each other along the first linear guide rail 51. The guiding function of the linear guide rail ensures that the support backing always maintains a linear motion trajectory, eliminating the offset error generated during the positioning process. The independent control of the dual servo motors allows the moving distances of the support backings on both sides to be adjusted according to the actual size of the workpiece. For example, when processing an asymmetric workpiece, the moving amount of a certain side can be adjusted individually. The layout method of the backside drive separates the drive device from the clamping working surface in space, protecting the motor from welding spatter and leaving a safe working space for the operator. After the support backing completes the positioning, it realizes clamping and fixing through the rigid support of the contact surface with the workpiece.

[0040] Through the above technical solutions, the present application realizes the full-automatic positioning and clamping of the middle partition plate assembly, eliminating the position deviation caused by manual adjustment. The bilateral independent drive mechanism can adapt to the positioning requirements of asymmetric workpieces, and the backside drive design effectively avoids the spatial interference between the equipment and the workpiece. The high-precision guiding characteristics of the linear guide rail can ensure the repeatability accuracy during the positioning process, meeting the geometric tolerance requirements of the vehicle frame welding process. By setting the groove 11 to unify the installation interface, the tooling structure is simplified, the manual intervention during the adjustment process is reduced, and the assembly efficiency is effectively improved.

[0041] In some embodiments, for example Figure 1 As shown, the seat ring positioning mechanism 4 is arranged between the first middle partition plate support backing 54 and the second middle partition plate support backing 55 and is slidably connected to the first linear guide rail 51 through the base 41. Specifically, the seat ring positioning mechanism 4 is arranged between the two middle partition plate support backings. Through the sliding connection of the base 41 with the first linear guide rail 51, the mechanism can adjust its position in the front-back direction. When it is necessary to adapt to seat ring assemblies 10 of different sizes or adjust the relative position between the seat ring and the middle partition plate during the vehicle frame assembly process, the sliding of the base 41 along the guide rail can realize the fine adjustment of the position of the seat ring positioning mechanism 4, avoiding interference with the middle partition plate support backing. At the same time, the sliding connection structure allows the seat ring positioning mechanism 4 to remain stable after being fixed, ensuring the alignment accuracy between the seat ring assembly 10 and the middle partition plate assembly.

[0042] Through the above technical solutions, the present application solves the problem of low assembly efficiency caused by insufficient space coordination during the positioning process of the seat ring and the middle partition plate assembly. By means of the sliding adjustment mechanism, the flexibility of position adjustment is improved, ensuring the precise alignment between the seat ring assembly 10 and the middle partition plate assembly, and at the same time reducing the intensity of manual intervention.

[0043] In some embodiments, for example Figure 1 and Figure 5As shown, there are two first linear guide rails 51, which are arranged in parallel at intervals in the groove 11. The first servo motor 52 and the second servo motor 53 are both arranged between the two first linear guide rails 51. Specifically, two first linear guide rails 51 are arranged in parallel in the groove 11, so that the first middle partition support backing 54 and the second middle partition support backing 55 are in bilateral contact with the double guide rails respectively. The first servo motor 52 drives the first middle partition support backing 54 to move along the guide rail, and the second servo motor 53 drives the second middle partition support backing 55. Since the double guide rails are symmetrically distributed on both sides of the groove 11, the movement trajectories of the two groups of support backings are strictly constrained, effectively eliminating the torsional offset that may occur in the single guide rail structure. After the servo motors are arranged in the middle, the synchronous movement accuracy of the support backings on both sides can be effectively guaranteed.

[0044] Through the above technical solution, the present application solves the problem of the structural layout of the middle partition positioning mechanism 5 in the groove 11. The double guide rail design improves the movement stability of the support backing. The central arrangement of the servo motors shortens the power transmission path, ensuring that the synchronous accuracy of the clamping and positioning on both sides is controlled within the process requirements. This structural layout also reduces the overall width of the tooling, adapts to the positioning requirements of different-sized frame components, and is convenient for centralized heat dissipation and maintenance operations of the servo motors.

[0045] In some embodiments, for example Figure 5 As shown, the middle partition positioning mechanism 5 further includes electro-permanent magnetic chucks 56. The electro-permanent magnetic chucks 56 are arranged in pairs and there are multiple pairs. Each pair of electro-permanent magnetic chucks 56 is respectively installed on the opposite surfaces of the first middle partition support backing 54 and the second middle partition support backing 55 and are arranged correspondingly. Among them, the electro-permanent magnetic chuck 56 refers to a clamping device that generates or eliminates magnetic force through current control. When energized, it generates strong magnetic force to adsorb the workpiece, and when the power is cut off, the magnetic force is eliminated to release the workpiece.

[0046] Specifically, when the two groups of middle partition components are respectively placed at the two support backings, multiple electro-permanent magnetic chucks 56 are synchronously energized to generate magnetic suction force, so that the middle partition components are adsorbed to the positioning reference surfaces of the support backings. When the workpiece needs to be released, the current is cut off to make the magnetic force disappear instantly, avoiding the frictional resistance during the separation of traditional mechanical jaws.

[0047] Through the above technical solution, the present application solves the problem of positioning offset caused by uneven clamping force during the assembly process of the middle partition components. The automatic alignment of the workpiece is achieved through symmetrically distributed magnetic suction force, ensuring that the positioning reference surfaces are completely fitted. At the same time, the risk of medium leakage that may exist in traditional hydraulic and pneumatic clamping devices is eliminated, improving the safety and cleanliness of the clamping process. The coordinated action of multiple pairs of electro-permanent magnetic chucks 56 makes the clamping force distribution more uniform, preventing workpiece deformation caused by local stress concentration, and is particularly suitable for the precise assembly operation of thin-walled middle partitions.

[0048] In some embodiments, for example Figure 2 As shown, the rear axle centering mechanism 2 includes a driving motor 21, a positive and negative lead screw 22, a second linear guide 23, a first rear axle support frame 24, a second rear axle support frame 25, a first rear axle support backing 26 and a second rear axle support backing 27; both the first rear axle support backing 26 and the second rear axle support backing 27 are slidably connected to the second linear guide 23 and are oppositely arranged, the first rear axle support frame 24 and the second rear axle support frame 25 are both arranged between the first rear axle support backing 26 and the second rear axle support backing 27 and are symmetrically spaced apart, and both ends of the positive and negative lead screw 22 are drivingly connected to the bottoms of the first rear axle support backing 26 and the second rear axle support backing 27, and the driving motor 21 is drivingly connected to one end of the positive and negative lead screw 22.

[0049] Among them, the driving motor 21 is used to provide rotational power, and its output shaft is drivingly connected to the positive and negative lead screw 22 to transmit torque. The positive and negative lead screw 22 refers to a lead screw structure with a double-thread, which synchronously drives the two-sided backing to move towards or away from each other through rotational motion. The first rear axle support frame 24 and the second rear axle support frame 25 refer to rigid brackets for carrying the rear axle structure 7, which are symmetrically arranged between the backings to provide balanced support. The first rear axle support backing 26 and the second rear axle support backing 27 refer to positioning components with clamping surfaces.

[0050] Specifically, after the driving motor 21 is started, it drives the positive and negative lead screw 22 to rotate. The reverse threads at both ends of the positive and negative lead screw 22 respectively drive the first rear axle support backing 26 and the second rear axle support backing 27 to move synchronously towards each other on the second linear guide 23. When the rear axle structure 7 is placed on the first rear axle support frame 24 and the second rear axle support frame 25, the two backings move towards each other until they contact both ends of the rear axle structure 7, and centering positioning is achieved by continuously applying thrust. The symmetrically arranged support frames keep the bottom surface of the rear axle structure 7 in uniform contact with the support surface during the clamping process, preventing local stress concentration. The guiding function of the second linear guide 23 ensures that the backing moves without deviation during the movement process, and the precise transmission characteristics of the positive and negative lead screw 22 make the displacement of the two-sided backing strictly synchronous.

[0051] Through the above technical solutions, the present application realizes automatic centering positioning and clamping of the rear axle structure 7 during the assembly process. By replacing manual adjustment with mechanical transmission, the clamping operation time is significantly shortened. The synchronous movement characteristics of the backing avoid the jamming phenomenon that may occur in traditional single-sided driving, and the stable support structure formed by the two groups of support frames effectively prevents the workpiece from tilting or shifting during the clamping process.

[0052] In some embodiments, for example Figure 2As shown, the rear axle centering mechanism 2 further includes tapered pins 28. There are two tapered pins 28, which are arranged oppositely on the opposite surfaces of the first rear axle support backing 26 and the second rear axle support backing 27. Among them, the tapered pin 28 refers to a positioning pin with a tapered outer surface, whose front end is a tapered guiding structure and the rear end is a fixed mounting base. The taper angle of the tapered pin 28 can be adjusted adaptively according to the installation clearance of the rear axle structure 7 to balance the guiding accuracy and structural strength. The axes of the two tapered pins 28 are symmetrically distributed along the central axis of the rear axle structure 7, and the tapered surfaces of the tapered pins 28 face each other to form symmetric guiding contact surfaces. This arrangement can be achieved through machining or assembly adjustment to ensure that the symmetric axes of the two tapered pins 28 coincide with the theoretical central axis of the rear axle structure 7.

[0053] Specifically, when clamping the rear axle structure 7, the tapered surfaces of the two tapered pins 28 contact both sides of the rear axle structure 7 respectively. Due to the symmetric arrangement of the tapered pins 28, when the rear axle structure 7 is under the clamping force, its lateral offset is converted into axial displacement by the inclination angle of the tapered surface, forcing the rear axle structure 7 to automatically adjust its position along the axis direction of the tapered pin 28. When there are installation deviations or structural asymmetries in the rear axle structure 7, the tapered surfaces of the tapered pins 28 generate component forces through sliding contact, guiding the rear axle structure 7 to move towards the central position until the clamping forces on both sides of the two tapered pins 28 reach a balanced state. During this process, the symmetric guiding function of the tapered pins 28 eliminates the deflection moment caused by unilateral clamping, ensuring that the central axis of the rear axle structure 7 is accurately aligned with the reference axis of the assembly fixture.

[0054] Through the above technical solution, the present application solves the problem of insufficient centering accuracy of the rear axle structure 7 caused by installation deviations or asymmetries. The symmetric guiding function of the tapered pins 28 enables the rear axle structure 7 to automatically correct the lateral offset during the clamping process, ensuring uniform distribution of the clamping force and avoiding positioning inclination caused by unilateral force. This design effectively improves the positioning accuracy of the rear axle structure 7, simplifies the operation process, reduces the need for manual adjustment, and ensures the consistency and reliability of the assembly fixture.

[0055] In some embodiments, for example Figure 2 As shown, there are two sets of the second linear guides 23, and the two sets of the second linear guides 23 are symmetrically arranged. Each set includes two second linear guides 23 arranged symmetrically in parallel. The two sets of the second linear guides 23 are respectively slidably connected to the first rear axle support backing 26 and the second rear axle support backing 27, and the positive and negative lead screw 22 is arranged between the two sets of the second linear guides 23. Specifically, the bottom of each support backing is simultaneously slidably connected to the two linear guides to form a bilateral support contact. The positive and negative lead screw 22 is arranged in the middle to effectively ensure the synchronous movement accuracy of the two end support backings.

[0056] Through the above technical solutions, the present application solves the technical problems of inaccurate and unstable centering and clamping of the rear axle centering mechanism 2. The design of the double guide rails significantly improves the moving stability of the supporting backing. The central arrangement of the positive and negative lead screws 22 not only shortens the power transmission path, but also ensures that the synchronous accuracy of the clamping and positioning on both sides is controlled within the process requirements.

[0057] In some embodiments, for example Figure 1 and Figure 3 As shown, the side plate clamping mechanism 3 includes a first side plate clamping mechanism 31 and a second side plate clamping mechanism 32 symmetrically arranged on the left and right sides of the assembly platform 1. The first side plate clamping mechanism 31 and the second side plate clamping mechanism 32 can push the side plates towards the middle of the two. Among them, the first side plate clamping mechanism 31 and the second side plate clamping mechanism 32 are used to clamp the side plate assembly, and their function is to realize the positioning and clamping of the workpiece through relative movement.

[0058] Furthermore, both the first side plate clamping mechanism 31 and the second side plate clamping mechanism 32 are composed of a support base 33, a telescopic oil cylinder 34, and an adjustable pressure head 35. The telescopic oil cylinder 34 and the adjustable pressure head 35 form an adjustment assembly. The support base 33 is provided with a first mounting hole and a second mounting hole distributed up and down. The two sets of adjustment assemblies are respectively installed at the first mounting hole and the second mounting hole. Among them, the telescopic oil cylinder 34 and the adjustable pressure head 35 are respectively arranged on the outer side and the inner side of the support base 33. Among them, the telescopic oil cylinder 34 tightens the side plate assembly to the target position through telescopic movement, and the side plate can be positioned and clamped by rotating the adjustable pressure head 35.

[0059] Specifically, when the two sets of side plate assemblies are respectively placed on the first side plate clamping mechanism 31 and the second side plate clamping mechanism 32, the telescopic oil cylinders 34 on both side clamping mechanisms fully extend synchronously to tighten the side plates to a predetermined position. When the side plates reach the predetermined position, the clamping force applied to the side plates is further adjusted by rotating the adjustable pressure head 35 to achieve precise adjustment of the clamping force and ensure the precise and stable positioning of the side plates.

[0060] In some embodiments, for example Figure 1 As shown, the first side plate clamping mechanism 31 and the second side plate clamping mechanism 32 are arranged in pairs, and multiple pairs of side plate clamping mechanisms 3 are evenly spaced along the front-rear direction on the assembly platform 1. Among them, the setting of multiple pairs of side plate clamping mechanisms 3 can further increase the clamping force on the side plate assembly, effectively prevent the side plates from shifting in position, and ensure the stability of the side plate installation.

[0061] In some embodiments, for example Figure 6As shown, the front partition positioning mechanism 6 includes a third linear guide rail 61, a positioning support 62, and a positioning shaft 63. The positioning support 62 is slidably connected to the third linear guide rail 61. A positioning hole is provided on the positioning support 62. When the front partition assembly 13 is placed on the positioning support 62, the positioning shaft 63 sequentially passes through the positioning holes on the front partition assembly 13 and the positioning holes on the positioning support 62 to complete the positioning of the front partition assembly 13. Among them, the positioning support 62 is used to provide support for the front partition assembly 13. The positioning shaft 63 is used to complete the positioning of the front partition assembly 13.

[0062] Specifically, after the front partition assembly 13 is placed on the positioning support 62, the positioning holes on the front partition assembly 13 and the positioning holes on the positioning support 62 are kept opposite to each other, and then the positioning shaft 63 is inserted to achieve the positioning of the front partition assembly 13. The positioning support 62 is slidably connected to the third linear guide rail 61 to achieve the movement adjustment in the front and rear directions to adapt to front partition assemblies 13 of different sizes.

[0063] The other components and operations of the workbench for assembling the aerial work platform vehicle frame according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0064] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0065] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An assembling tool for the frame of an aerial work platform, characterized in that, include: Assembling a platform and a rear axle centering mechanism, a side plate clamping mechanism, a seat ring positioning mechanism, a middle partition positioning mechanism and a front partition positioning mechanism arranged on the platform; The rear axle centering mechanism supports and center-clamps the rear axle structure of the frame, the side panel clamping mechanism supports, positions and clamps the side panel assembly, the seat ring positioning mechanism provides height support and centering clamps for the frame seat ring assembly, the middle partition positioning mechanism supports, clamps and positions the middle partition assembly, and the front partition positioning mechanism positions the front partition assembly.

2. The tooling for the frame group of the aerial work platform according to claim 1, characterized in that, The seat ring positioning mechanism includes a base, a supporting positioning shaft and a pneumatic three-jaw chuck installed on the base, the supporting positioning shaft provides height support for the frame seat ring assembly, and the pneumatic three-jaw chuck performs centering and clamping on the frame seat ring assembly.

3. The tooling for assembling the high-altitude work platform vehicle frame group according to claim 2, characterized in that, There are four supporting and positioning shafts, and the four supporting and positioning shafts are respectively arranged at the four corners of the base.

4. The tooling for assembling the high-altitude work platform vehicle frame group according to claim 2, characterized in that, The assembly platform is provided with a groove extending along the front-rear direction, and the seat ring positioning mechanism and the middle partition plate positioning mechanism are both installed in the groove.

5. The tooling for the frame group of the aerial work platform according to claim 4, characterized in that, The middle partition positioning mechanism includes a first linear guide, a first servo motor, a second servo motor, a first middle partition support backer and a second middle partition support backer. The first middle partition support backer and the second middle partition support backer are both slidably connected to the first linear guide and are relatively arranged. The first servo motor and the second servo motor are respectively arranged on the back sides of the first middle partition support backer and the second middle partition support backer and are respectively connected to the back sides of the first middle partition support backer and the second middle partition support backer.

6. The tooling for assembling the aerial work platform vehicle frame group according to claim 5, characterized in that, The seat ring positioning mechanism is arranged between the first middle partition plate supporting backer and the second middle partition plate supporting backer and is slidably connected to the first linear guide rail through the base.

7. The tooling for assembling the aerial work platform vehicle frame set according to claim 5, characterized in that, Two first linear guide rails are provided, and the two first linear guide rails are arranged in parallel and spaced apart in the groove, and the first servo motor and the second servo motor are both arranged between the two first linear guide rails.

8. The tooling for assembling the high-altitude work platform vehicle frame group according to claim 5, characterized in that, The middle partition plate positioning mechanism also includes an electro-permanent magnetic suction cup, which is arranged in pairs and multiple pairs are provided. Each pair of the electro-permanent magnetic suction cups is respectively installed on the opposite surfaces of the first middle partition plate support backing and the second middle partition plate support backing and arranged accordingly.

9. The tooling for assembling the aerial work platform vehicle frame set according to claim 1, characterized in that, The rear axle centering mechanism includes a driving motor, a forward and reverse lead screw, a second linear guide rail, a first rear axle support frame, a second rear axle support frame, a first rear axle support backer and a second rear axle support backer; the first rear axle support backer and the second rear axle support backer are both slidably connected to the second linear guide rail and are arranged relatively to each other, the first rear axle support frame and the second rear axle support frame are both arranged between the first rear axle support backer and the second rear axle support backer and are symmetrically spaced apart, the two ends of the forward and reverse lead screws are respectively transmission-connected to the bottom of the first rear axle support backer and the second rear axle support backer, and the driving motor is transmission-connected to one end of the forward and reverse lead screws.

10. The tooling for assembling the aerial work platform vehicle frame group according to claim 9, characterized in that, The rear axle centering mechanism further includes tapered pins. There are two tapered pins, and the two tapered pins are oppositely arranged on the opposite surfaces of the first rear axle support backing and the second rear axle support backing.

11. The tooling for assembling the aerial work platform vehicle frame set according to claim 9, characterized in that, There are two sets of the second linear guides. The two sets of the second linear guides are symmetrically arranged. Each set includes two second linear guides arranged in parallel and symmetrically. The two sets of the second linear guides are respectively slidably connected to the first rear axle support backing and the second rear axle support backing. The positive and negative lead screw is arranged between the two sets of the second linear guides.

12. The tooling for assembling the aerial work platform vehicle frame set according to claim 1, characterized in that, The side plate clamping mechanism includes a first side plate clamping mechanism and a second side plate clamping mechanism symmetrically arranged on the left and right sides of the butt-welding platform. The first side plate clamping mechanism and the second side plate clamping mechanism can push the side plates to move towards the middle of the two.

13. The tooling for assembling the high-altitude work platform vehicle frame group according to claim 12, characterized in that, Both the first side plate clamping mechanism and the second side plate clamping mechanism are composed of a support base, a telescopic oil cylinder and an adjustable pressure head. The telescopic oil cylinder and the adjustable pressure head form an adjustment assembly. First mounting holes and second mounting holes are vertically distributed on the base. The two adjustment assemblies are respectively installed at the first mounting hole and the second mounting hole. Among them, the telescopic oil cylinder and the adjustable pressure head are respectively arranged on the outer side and the inner side of the base.

14. The tooling for assembling the aerial work platform vehicle frame group according to claim 12, characterized in that, The first side plate clamping mechanism and the second side plate clamping mechanism are arranged in pairs. Multiple pairs of side plate clamping mechanisms are evenly spaced in the front-rear direction and arranged on the butt-welding platform.

15. The tooling for assembling the aerial work platform vehicle frame set according to claim 1, characterized in that, The front partition positioning mechanism includes a third linear guide, a positioning support and a positioning shaft. The positioning support is slidably connected to the third linear guide. A positioning hole is provided on the positioning support. When the front partition assembly is placed on the positioning support, the positioning shaft is used to sequentially pass through the positioning holes on the front partition assembly and the positioning holes on the positioning support to complete the positioning of the front partition assembly.

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