A high-altitude work platform turntable machining fixture

Abstract

This utility model discloses a machining fixture for a turntable of an aerial work platform, comprising: a machine tool worktable and a front-end rotary clamping device, a lifting support device, and a tail-end clamping device mounted on the worktable. The front-end rotary clamping device is arranged at the front of the machine tool worktable. Two sets of lifting support devices are provided: one set is arranged in the middle of the machine tool worktable, and the other set, together with the tail-end clamping device, is arranged at the rear of the machine tool worktable. The front-end rotary clamping device, the lifting support device, and the tail-end clamping device can automatically and collaboratively clamp the main arm of the aerial work platform. This application achieves rapid workpiece positioning and automatic clamping, significantly reducing clamping time and the number of operators required. The collaborative clamping system significantly reduces machining vibration amplitude.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, and in particular to a machining fixture for a turntable machine for aerial work platforms. Background Technology

[0002] In recent years, with the development of aerial work platforms towards greater heights and larger dimensions, turntable structures have become increasingly diverse, exhibiting significant differences in size. Traditional clamping methods have several shortcomings: First, operators must manually use tools such as clamping plates and shims for clamping, resulting in high labor intensity and low efficiency; second, existing mechanical fixtures lack horizontal positioning capabilities, requiring operators to repeatedly align the workpiece along the machine tool's X-axis using centers, leading to significant workpiece vibration during machining; third, traditional fixtures use lead screws and nuts for tightening, requiring operators to tighten each screw individually with wrenches, a cumbersome process; finally, current technology requires two clamping operations to complete the machining of all turntable features, severely impacting machining efficiency. These problems are particularly prominent in the machining of large turntables for aerial work platforms, not only increasing the labor intensity of operators but also hindering improvements in production efficiency and machining accuracy. Summary of the Invention

[0003] In view of this, the present invention provides a machining fixture for a turntable machine for aerial work platforms, which has the advantages of reducing labor intensity and improving machining efficiency and accuracy.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A machining fixture for a turntable of an aerial work platform includes: a machine tool worktable and a front-end rotary clamping device, a lifting support device and a tail clamping device installed on the machine tool worktable.

[0006] The front rotary clamping device is located at the front of the machine tool table, and there are two sets of lifting support devices. One set is located in the middle of the machine tool table, and the other set is located at the rear of the machine tool table together with the tail clamping device. The front rotary clamping device, the lifting support device and the tail clamping device can automatically work together to clamp the main arm of the aerial work platform.

[0007] Preferably, the front-end rotary clamping device includes a support base, a front-end vertical positioning clamping device, and a front-end horizontal positioning clamping device. The front-end vertical positioning clamping device is slidably mounted on the support base and can move back and forth. The front-end horizontal positioning clamping device is slidably mounted on the front side of the front-end vertical positioning clamping device and can move up and down.

[0008] Preferably, the front-end rotary clamping device includes a housing, a column, a rotary arm, a rotary shaft, a rotary motor, and a first hydraulic cylinder; the rotary shaft is vertically fixedly inserted into the middle of the housing, the housing is sleeved on the rotary shaft, one end of the rotary arm is installed in the housing and sleeved on the rotary shaft, the rotary motor is installed on the housing, the rotary motor is drivenly connected to the rotary arm, the first hydraulic cylinder is vertically installed in the housing, and the free end of the piston rod of the first hydraulic cylinder is hinged to the bottom surface of the housing.

[0009] Preferably, the support base is provided with a linear guide rail and a first motor and a first lead screw that are in transmission cooperation; the bottom of the column is provided with a sliding groove, and the column is slidably assembled on the support base through the cooperation of the linear guide rail and the sliding groove; the first motor is connected to the bottom surface of the column through the first lead screw to drive the column to move back and forth.

[0010] Preferably, the front-end rotary clamping device further includes a first gear and a second gear; the first gear is installed at the free end of the drive shaft of the rotary motor, and the second gear is sleeved on the rotary shaft and fixedly connected to the rotary arm, and the first gear meshes with the second gear.

[0011] Preferably, the front-end lateral positioning and clamping device includes a lateral positioning base, a second motor, a second lead screw, a second hydraulic cylinder, a positioning block, and a clamping block; the lateral positioning base has a lateral mounting groove, the second motor is installed at one end of the lateral mounting groove, the second lead screw is located in the lateral mounting groove, the second motor and the second lead screw are driven together, the positioning block is driven connected to the second lead screw, the second hydraulic cylinder is installed at the other end of the lateral mounting groove, the piston rod of the second hydraulic cylinder extends into the lateral mounting groove, and the clamping block is fixedly installed at the free end of the piston rod of the second hydraulic cylinder.

[0012] Preferably, a linear guide rail and a third motor and a third lead screw are vertically arranged on the front side of the column; a sliding groove is provided at the bottom of the horizontal positioning base, and the horizontal positioning base is slidably mounted on the front side of the column through the linear guide rail cooperating with the sliding groove; the third motor is connected to the bottom of the horizontal positioning base through the third lead screw to drive the horizontal positioning base to move up and down.

[0013] Preferably, the front-end rotary clamping device further includes a manual support assembly; two sets of manual support assemblies are provided, and a support platform is provided on the front side of the column. The two sets of manual support assemblies are installed side by side and spaced apart on the support platform. Each manual support assembly includes a manual support base and a manual support rod. The manual support rod is vertically screwed to the manual support base. The height of the manual support rod can be adjusted by rotating the manual support rod.

[0014] Preferably, the manual support rod is provided with an adjustment handle; the support platform is provided with a linear guide rail, and the bottom of the manual support seat is provided with a sliding groove. The manual support assembly can move on the linear guide rail by cooperating with the sliding groove.

[0015] Preferably, the lifting support device includes a lifting support base, a first motor screw drive assembly, a left lifting support assembly, and a right lifting support assembly. The lifting support base is provided with a linear guide rail. The left and right lifting support assemblies are slidably mounted on the linear guide rail. Two sets of the first motor screw drive assemblies are provided and are both mounted on the lifting support base. The two sets of the first motor screw drive assemblies are respectively used to drive the left and right lifting support assemblies to move on the linear guide rail.

[0016] Preferably, the left lifting support assembly includes a left lifting support column, a pushing cylinder, a clamping column, and a left turning cylinder; the left lifting support column is provided with a left horizontal mounting seat, the piston rod of the pushing cylinder is kinetically connected to the clamping column and is mounted on the left horizontal mounting seat, and the left turning cylinder is fixedly mounted on the left horizontal mounting seat.

[0017] Preferably, the right lifting support assembly includes a right lifting support column, a fourth motor, a positioning column, and a right corner cylinder; the right lifting support column is provided with a right horizontal mounting seat, the drive shaft of the fourth motor is connected to the positioning column and is mounted on the right horizontal mounting seat, and the right corner cylinder is fixedly mounted on the right horizontal mounting seat.

[0018] Preferably, both the left and right lifting support columns are equipped with lifting columns and screw jacks. The screw jacks are driven by hydraulic motors and are located below the lifting columns and are connected to the lifting columns to drive the lifting columns to rise or fall. A support platform is installed at the upper end of the lifting columns.

[0019] Preferably, the tail clamping device includes a tail support base, a second motor screw drive assembly, a third motor screw drive assembly, a movable seat, a fixed bracket, a third hydraulic cylinder, and a pressure plate. A linear guide rail is provided on the tail support base, and a sliding groove is provided at the bottom of the movable seat. The movable seat is slidably mounted on the tail support base through the cooperation of the linear guide rail and the sliding groove. A set of lifting support devices is slidably mounted on the tail support base and located in front of the movable seat. The fixed bracket is fixedly installed on the movable seat, and a clamping support is provided on the top surface of the fixed bracket. The pressure plate is hinged to the clamping support. The third hydraulic cylinder is vertically fixed below the top surface of the fixed bracket, and the free end of the piston rod of the third hydraulic cylinder is hinged to the end of the pressure plate. The second motor screw drive assembly and the third motor screw drive assembly are both mounted on the tail support base and are respectively used to drive the movable seat and the lifting support device to move on the linear guide rail.

[0020] The beneficial effects of this utility model are as follows: Compared with the prior art, this application achieves rapid workpiece positioning and automatic clamping, significantly reducing clamping time and the number of operators required. The collaborative clamping system can significantly reduce the amplitude of machining vibration.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of the high-altitude work platform turntable machining fixture (with turntable) of this utility model;

[0023] Figure 2 This is a structural schematic diagram of the high-altitude work platform turntable machining fixture (without turntable) of this utility model;

[0024] Figure 3 This is a structural schematic diagram of the front-end rotary pressing device (front view) of this utility model;

[0025] Figure 4 This is a structural schematic diagram of the front-end rotary pressing device (back side) of this utility model;

[0026] Figure 5 This is a cross-sectional view of the front-end rotary clamping device of this utility model;

[0027] Figure 6 This is a schematic diagram of the front-end lateral positioning and clamping device of this utility model;

[0028] Figure 7 This is a structural schematic diagram of the lifting support device of this utility model;

[0029] Figure 8 This is a cross-sectional view of the left lifting support assembly of this utility model;

[0030] Figure 9 This is a cross-sectional view of the positioning column of the left lifting support assembly of this utility model;

[0031] Figure 10 This is a schematic structural view of the tail clamping device (front) of this utility model;

[0032] Figure 11 This is a schematic diagram of the tail clamping device (back side) of this utility model.

[0033] Figure label:

[0034] 1. Machine tool worktable;

[0035] 2. Front-end rotary clamping device; 201. Support base; 202. Front-end vertical positioning clamping device; 203. Front-end horizontal positioning clamping device; 204. First gear; 205. Second gear; 206. Manual support assembly; 2011. First motor; 2012. First lead screw; 2021. Housing; 2022. Column; 2023. Rotating arm; 2024. Rotating shaft; 2025. Rotary motor; 2026. First hydraulic cylinder; 2027. Third motor; 2028. Third lead screw; 2029. Support platform; 2031. Horizontal positioning base; 2032. Second motor; 2033. Second lead screw; 2034. Second hydraulic cylinder; 2035. Positioning block; 2036. Clamping block;

[0036] 3. Lifting support device; 301. Lifting support base; 302. First motor screw drive assembly; 303. Left lifting support assembly; 304. Right lifting support assembly; 305. Lifting column; 306. Screw jack; 307. Hydraulic motor; 3031. Left lifting support column; 3032. Push cylinder; 3033. Clamping column; 3034. Left corner cylinder; 3035. Left horizontal mounting base; 3041. Right lifting support column; 3042. Fourth motor; 3043. Positioning column; 3044. Right corner cylinder; 3045. Right horizontal mounting base;

[0037] 4. Tail clamping device; 401. Tail support base; 402. Second motor screw drive assembly; 403. Third motor screw drive assembly; 404. Moving seat; 405. Fixed bracket; 406. Third hydraulic cylinder; 407. Pressure plate. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] The following is for reference. Figures 1 to 11 This invention describes the machining fixture for a turntable on an aerial work platform, as described in an embodiment of the present invention.

[0041] This application discloses a machining fixture for a turntable of an aerial work platform, comprising: a machine tool worktable 1 and a front-end rotary clamping device 2, a lifting support device 3, and a tail-end clamping device 4 mounted on the machine tool worktable 1. The front-end rotary clamping device 2 is arranged at the front of the machine tool worktable 1. The lifting support device 3 is provided in two sets, one set is arranged in the middle of the machine tool worktable 1, and the other set is arranged together with the tail-end clamping device 4 at the rear of the machine tool worktable 1. The front-end rotary clamping device 2, the lifting support device 3, and the tail-end clamping device 4 can automatically cooperate to clamp the main arm of the aerial work platform.

[0042] The machine tool worktable 1 is a rigid platform that supports the fixture assembly. The front rotary clamping device 2 is a clamping mechanism with rotary positioning function. The lifting support device 3 is a vertically adjustable support unit. The tail clamping device 4 is a composite clamping mechanism located at the end of the workpiece.

[0043] Specifically, after the workpiece is hoisted onto the worktable, the front rotary clamping device 2 completes the circumferential positioning of the workpiece end through rotation, while the hydraulic system drives the clamping block to perform radial clamping. The middle lifting support device 3 rises to a predetermined height, providing an intermediate support point for the workpiece. The rear lifting support device 3 is linked with the tail clamping device 4; the former adjusts the support height to match the tail contour of the workpiece, while the latter uses hydraulic drive to fix the end of the clamping plate 407. The three sets of devices achieve coordinated action sequence through a central control system, maintaining a balanced pressure distribution during clamping. When processing workpieces of different sizes, each device adjusts its position along the worktable guide rail to ensure that the clamping force application point is always in the optimal rigidity area of ​​the workpiece.

[0044] Compared to existing technologies, traditional fixtures use a single-point fixing method, while this solution achieves spatial force balance through a three-section layout. Existing devices require two clamping operations to complete processing, while this solution utilizes an adjustable clamping unit to achieve full coverage in a single clamping operation, effectively improving clamping efficiency.

[0045] Through the above technical solution, this application achieves rapid workpiece positioning and automatic clamping, significantly reducing clamping time and the number of operators required. The collaborative clamping system can significantly reduce machining vibration amplitude.

[0046] In some embodiments, for example Figure 1 and Figure 2 As shown, the front-end rotary clamping device 2 includes a support base 201, a front-end vertical positioning clamping device 202, and a front-end horizontal positioning clamping device 203. The front-end vertical positioning clamping device 202 is slidably mounted on the support base 201 and can move back and forth. The front-end horizontal positioning clamping device 203 is slidably mounted on the front side of the front-end vertical positioning clamping device 202 and can move up and down.

[0047] The support base 201 is the basic structure supporting the vertical positioning and clamping device, and its function is to provide a stable sliding track for vertical movement. The front vertical positioning and clamping device 202 is a mechanism for positioning along the height direction of the workpiece, used to adjust the reference position of the workpiece in the vertical direction. The front horizontal positioning and clamping device 203 is a mechanism for positioning along the horizontal direction of the workpiece.

[0048] Specifically, the support base 201, through the cooperation of linear guide rails and slide rails, enables the vertical positioning clamping device to move back and forth under the drive of a servo motor, thereby adapting to the clamping requirements of workpieces of different lengths. A transverse guide rail is provided on the front side of the vertical positioning clamping device, allowing the transverse positioning clamping device to adjust its height vertically. After the workpiece is hoisted onto the support platform 2029, the back-and-forth movement of the vertical device and the up-and-down movement of the transverse device form an orthogonal coordinate system. Through the combined movement of these two components, the horizontal and vertical reference planes of the workpiece can be accurately positioned. The hydraulic cylinder in the transverse positioning clamping device pushes the clamping block 2036 to contact the side of the workpiece, achieving automatic clamping at the pre-set positioning position of the servo motor, eliminating positioning errors caused by manual adjustment.

[0049] Through the above technical solutions, this application realizes the automated positioning and clamping of workpieces in the horizontal and vertical directions. The positioning reference position is precisely controlled by the servo system, effectively eliminating the error of manual operation. The hydraulically driven clamping mechanism replaces the traditional manual pressure plate 407, reducing the operation intensity and improving the clamping efficiency. The orthogonal adjustable structure adapts to the clamping requirements of workpieces of different sizes, solving the problem of workpiece vibration caused by the fixed positioning device in traditional fixtures.

[0050] In some embodiments, for example Figures 3 to 5 As shown, the front-end rotary clamping device 2 includes a housing 2021, a column 2022, a rotary arm 2023, a rotary shaft 2024, a rotary motor 2025, and a first hydraulic cylinder 2026. The rotary shaft 2024 is vertically fixedly inserted into the middle of the housing 2021, and the housing 2021 is sleeved on the rotary shaft 2024. One end of the rotary arm 2023 is installed inside the housing 2021 and sleeved on the rotary shaft 2024. The rotary motor 2025 is installed on the housing 2021 and is connected to the rotary arm 2023 in a transmission manner. The first hydraulic cylinder 2026 is vertically installed inside the housing 2021, and the free end of the piston rod of the first hydraulic cylinder 2026 is hinged to the bottom surface of the housing 2021. The support base 201 is provided with a linear guide rail and a first motor 2011 and a first lead screw 2012 that are in transmission cooperation; the bottom of the column 2022 is provided with a sliding groove, and the column 2022 is slidably assembled on the support base 201 through the cooperation of the linear guide rail and the sliding groove. The first motor 2011 is connected to the bottom surface of the column 2022 through the first lead screw 2012 to drive the column 2022 to move back and forth.

[0051] The housing 2021 is a rigid shell structure that houses the rotating shaft 2024 and transmission components. It can be implemented using a welded steel plate box-type structure, and its design, fitted onto the rotating shaft 2024, allows the housing 2021 to rotate around the shaft. The rotating shaft 2024 is a transmission shaft vertically mounted at the center of the housing 2021, and can be implemented using a stepped alloy steel shaft, providing rotational center support for the rotating arm 2023. The rotary motor 2025 is the power device that drives the rotating arm 2023 to rotate, and can be implemented using a servo motor with a reducer, transmitting torque through gear meshing. The first hydraulic cylinder 2026 is a vertically arranged linear actuator, and can be implemented using a double-acting single-piston rod cylinder. Its hinged installation allows the housing 2021 to maintain force balance during lifting and lowering.

[0052] Specifically, the sleeve structure between the housing 2021 and the rotating shaft 2024 allows the rotating arm 2023 to adjust its angle around the shaft. The rotary motor 2025 drives the rotating arm 2023 to rotate around the shaft via gear transmission, achieving flexible control of the clamping direction. The piston rod of the first hydraulic cylinder 2026 extends and retracts, causing the housing 2021 to move up and down along the rotating shaft 2024, forming a vertical clamping force on the workpiece. The linear guide rail on the support base 201 engages with the sliding groove at the bottom of the column 2022, forming a sliding guide mechanism. When the first motor 2011 drives the first lead screw 2012 to rotate, the lead screw nut drives the column 2022 to move back and forth along the guide rail, thereby adjusting the relative position of the clamping device and the workpiece. The sliding assembly structure of the column 2022 ensures movement accuracy through the clearance fit between the guide rail and the sliding groove, while maintaining positional stability using the self-locking characteristic of the lead screw transmission. The transmission connection between the rotary motor 2025 and the rotating arm 2023 adopts a gear reduction mechanism, which improves torque output while achieving precise control of the rotation angle.

[0053] Through the above technical solutions, this application achieves electric adjustment of the clamping position in the forward and backward directions and automatic rotation control of the clamping angle, enabling rapid adaptation to the clamping requirements of workpieces with different shapes and sizes. The mating structure between the rotating shaft 2024 and the housing 2021 ensures the stability of the clamping device during rotation, preventing workpiece vibration and displacement caused by angle adjustment. The combination of linear guide rail and lead screw transmission system achieves millimeter-level position adjustment accuracy, effectively improving workpiece positioning accuracy. The vertical pressure method of the hydraulic cylinder and the angle adjustment of the rotating arm 2023 work together to form a multi-dimensional adaptive clamping system, solving the workpiece displacement problem caused by a single clamping direction in traditional fixtures. The sliding assembly structure of the column 2022 constrains the movement trajectory through rigid guide rails, ensuring adjustment freedom while enhancing the overall structural rigidity, adapting to the processing conditions of heavy workpieces.

[0054] In some embodiments, for example Figure 5 As shown, the front-end rotary pressing device 2 further includes a first gear 204 and a second gear 205; the first gear 204 is installed on the free end of the drive shaft of the rotary motor 2025, and the second gear 205 is sleeved on the rotary shaft 2024 and fixedly connected to the rotary arm 2023, and the first gear 204 and the second gear 205 mesh with each other.

[0055] Specifically, when the rotary motor 2025 starts, it drives the first gear 204 to rotate synchronously, transmitting power to the second gear 205 through the meshing tooth surfaces. Since the second gear 205 forms a rigid connection with the rotating shaft 2024 and the rotating arm 2023, the rotational torque generated by the gear pair directly drives the rotating arm 2023 to rotate around the axis of the rotating shaft 2024. During gear meshing, the progressive meshing characteristics of the helical gears effectively eliminate transmission backlash. Under the control of the hydraulic system, the forward and reverse rotation of the rotary motor 2025 is converted into precise angle adjustment of the rotating arm 2023 through the gear pair. Combined with the lifting and lowering action of the hydraulic cylinder, this achieves three-dimensional positioning of the workpiece clamping position.

[0056] Through the above technical solution, this application achieves backlash-free power transmission in the drive system of the rotary arm 2023, effectively ensuring that no deviation occurs during workpiece clamping. The speed control signal of the rotary motor 2025 forms a linear correspondence with the transmission ratio of the gear pair, significantly improving the angular positioning accuracy of the rotary arm 2023 and meeting the requirements of automated machining for repeatability. The enclosed structure of the gearbox 2021 simultaneously prevents the intrusion of cutting fluid and metal chips, maintaining the long-term operational stability of the transmission system.

[0057] In some embodiments, for example Figure 6 As shown, the front-end lateral positioning and clamping device 203 includes a lateral positioning base 2031, a second motor 2032, a second lead screw 2033, a second hydraulic cylinder 2034, a positioning block 2035, and a clamping block 2036. A lateral mounting groove is provided on the lateral positioning base 2031. The second motor 2032 is installed at one end of the lateral mounting groove. The second lead screw 2033 is located in the lateral mounting groove. The second motor 2032 and the second lead screw 2033 are driven together. The positioning block 2035 is drivenly connected to the second lead screw 2033. The second hydraulic cylinder 2034 is installed at the other end of the lateral mounting groove. The piston rod of the second hydraulic cylinder 2034 extends into the lateral mounting groove. The clamping block 2036 is fixedly installed on the free end of the piston rod of the second hydraulic cylinder 2034. The front side of the column 2022 is vertically equipped with a linear guide rail and a third motor 2027 and a third lead screw 2028 that are connected for transmission. The bottom of the horizontal positioning base 2031 is provided with a sliding groove. The horizontal positioning base 2031 is slidably assembled on the front side of the column 2022 through the cooperation of the linear guide rail and the sliding groove. The third motor 2027 is connected to the bottom of the horizontal positioning base 2031 through the third lead screw 2028 to drive the horizontal positioning base 2031 to move up and down.

[0058] Specifically, after the workpiece is hoisted into the fixture, the second motor 2032 drives the second lead screw 2033 to rotate, causing the positioning block 2035 to move along the transverse mounting groove to a preset position, forming a transverse positioning reference. The second hydraulic cylinder 2034 pushes the clamping block 2036 to move towards the workpiece, forming a counter-clamping force with the positioning block 2035. During this process, the third motor 2027 drives the transverse positioning base 2031 to move vertically along the column 2022 via the third lead screw 2028, so that the overall height of the clamping device matches the workpiece clamping surface. The second lead screw 2033 and the second hydraulic cylinder 2034 in the transverse mounting groove are placed at both ends of the groove, forming an independently driven positioning and clamping unit. The movement accuracy of the positioning block 2035 is ensured by the lead screw transmission, and the clamping force of the clamping block 2036 is provided by the hydraulic system. The linear guide rail on the column 2022 and the third lead screw 2028 constitute a vertical guiding mechanism, and the height of the clamping device is adaptively adjusted through servo control.

[0059] Through the above technical solution, this application achieves automated adjustment of the workpiece's lateral positioning. The position of the positioning block 2035 is precisely controlled by a motor-driven lead screw, solving the problems of low efficiency and poor accuracy associated with traditional manual adjustment. The servo lifting function of the clamping device in the vertical direction allows the fixture to adapt to turntable workpieces of different heights and sizes, overcoming the poor versatility of fixed fixtures. The separate layout design of the positioning and clamping units achieves coordinated operation of high-precision positioning and strong clamping within a limited space, avoiding the motion interference problems present in traditional integrated structures.

[0060] In some embodiments, for example Figure 3 As shown, the front-end rotary clamping device 2 also includes a manual support assembly 206. Two sets of manual support assemblies 206 are provided. A support platform 2029 is provided on the front side of the column 2022. The two sets of manual support assemblies 206 are installed side-by-side and spaced apart on the support platform 2029. Each manual support assembly 206 includes a manual support base and a manual support rod. The manual support rod is vertically screwed to the manual support base. The height of the manual support rod can be adjusted by rotating it. An adjustment handle is provided on the manual support rod. A linear guide rail is provided on the support platform 2029, and a sliding groove is provided at the bottom of the manual support base. The manual support assembly 206 can move on the linear guide rail by cooperating with the sliding groove.

[0061] The manual support base is a fixed base that supports the manual support rod. It can be implemented using a metal seat with an internally threaded hole to form a threaded connection with the support rod. The manual support rod is an adjusting rod with external threads, which can be implemented using a trapezoidal threaded rod. Vertical height adjustment is achieved through rotation. The adjusting handle is an operating component mounted on the top of the support rod, which can be implemented using a cross handle or a star handle to provide rotational torque.

[0062] Specifically, when the workpiece is hoisted into the fixture, the operator first moves the two sets of manual support components 206 laterally along the linear guide rail of the support platform 2029, matching their spacing with the bottom support points of the workpiece. Then, by rotating the adjusting handle, the support rod is driven to rise and fall vertically through a threaded engagement, bringing the two support points to the predetermined height. Since the two sets of support components can be adjusted independently, the operator can quickly position the workpiece in a horizontal state through alternating fine adjustments. The threaded transmission mechanism of the support rod allows for millimeter-level precision fine adjustments, while the sliding pair structure of the linear guide rail allows for stepless adjustment of the support components in the lateral direction, adapting to the support requirements of workpieces of different widths.

[0063] Through the above technical solution, this application solves the problems of inconvenient manual support adjustment and inability to quickly adapt to the horizontal positioning of workpieces of different sizes during the clamping process of the aerial work platform turntable. By using threaded transmission to achieve precise adjustment of the support height, combined with guide rail sliding to achieve flexible adjustment of the support spacing, operators can quickly complete the horizontal positioning during workpiece hoisting, significantly improving clamping efficiency. At the same time, this structure can adapt to turntable workpieces of different shapes and sizes, enhancing the versatility of the fixture.

[0064] In some embodiments, for example Figure 7 and Figure 9 As shown, the lifting support device 3 includes a lifting support base 301, a first motor 2011 screw drive assembly, a left lifting support assembly 303, and a right lifting support assembly 304. A linear guide rail is provided on the lifting support base 301. The left lifting support assembly 303 and the right lifting support assembly 304 are slidably mounted on the linear guide rail. Two sets of the first motor 2011 screw drive assembly are provided and are both installed on the lifting support base 301. The two sets of first motor 2011 screw drive assemblies are used to drive the left lifting support assembly 303 and the right lifting support assembly 304 to move on the linear guide rail, respectively. The left lifting support assembly 303 includes a left lifting support column 3031, a pushing cylinder 3032, a clamping column 3033, and a left-turning cylinder 3034. A left horizontal mounting seat 3035 is provided on the left lifting support column 3031. The piston rod of the pushing cylinder 3032 is operatively connected to the clamping column 3033 and both are mounted on the left horizontal mounting seat 3035. The left-turning cylinder 3034 is fixedly mounted on the left horizontal mounting seat 3035. The right lifting support assembly 304 includes a right lifting support column 3041, a fourth motor 3042, a positioning column 3043, and a right-turning cylinder 3044. A right horizontal mounting seat 3045 is provided on the right lifting support column 3041. The drive shaft of the fourth motor 3042 is operatively connected to the positioning column 3043 and both are mounted on the right horizontal mounting seat 3045. The right-turning cylinder 3044 is fixedly mounted on the right horizontal mounting seat 3045.

[0065] The lifting support base 301 is the base structure that supports the left and right lifting support assemblies 304, and its function is to provide guiding support for lateral movement. The first motor 2011 screw drive assembly is a transmission mechanism composed of a servo motor and a ball screw. Specifically, it can be implemented by connecting the servo motor to the screw through a coupling, and is used to drive the left and right assemblies to move precisely along the guide rail. The left horizontal mounting base 3035 is a horizontal bearing platform fixed to the top of the left lifting support column 3031. Specifically, it can be formed by processing steel plate, and is used to integrate the push cylinder 3032 and the left corner cylinder 3034. The push cylinder 3032 is a hydraulic actuator arranged in the horizontal direction. Specifically, it can be implemented by a double-acting hydraulic cylinder, and its piston rod is connected to the clamping column 3033 to provide lateral clamping force. The left corner cylinder 3034 is a hydraulic device with a rotating pressure arm. Specifically, it can be implemented by a swing cylinder with a hinged fulcrum, and is used to apply vertical clamping force to the workpiece.

[0066] Specifically, when the workpiece is placed in the fixture, the two sets of first motor 2011 lead screw drive assemblies drive the left and right lifting support assemblies 304 to move laterally along the linear guide rail, so that the distance between the left horizontal mounting seat 3035 and the right horizontal mounting seat 3045 matches the workpiece width. In the left lifting support assembly 303, the push cylinder 3032 pushes the clamping column 3033 to move horizontally, causing the clamping column 3033 to contact the workpiece sidewall for lateral positioning. The left corner cylinder 3034 then presses down to complete vertical fixation. In the right lifting support assembly 304, the fourth motor 3042 drives the positioning column 3043 to rotate to a predetermined angle, so that the end face of the positioning column 3043 is in contact with the axial reference surface of the workpiece. The right corner cylinder 3044 presses down synchronously to form symmetrical clamping. The left and right assembly positions are adaptively adjusted through the motor lead screw drive, and combined with the lateral clamping of the push cylinder 3032 and the vertical pressing of the corner cylinder, a coordinated clamping effect in three-dimensional space is formed.

[0067] Through the above technical solution, this application achieves automatic adjustment of the workpiece support position and multi-dimensional collaborative clamping, solving the technical defects of traditional fixtures that cannot adapt to workpiece size and multi-directional clamping. The independent movement control of the left and right lifting support components 304 can adapt to workpieces of different widths. The linkage operation of the pushing cylinder 3032 and the corner cylinder eliminates vibration displacement during workpiece processing. The rotation of the positioning column 3043 driven by the fourth motor 3042 ensures accurate matching of the axial positioning reference. The overall structure effectively improves clamping efficiency and processing stability.

[0068] In some embodiments, for example Figure 8As shown, both the left lifting support column 3031 and the right lifting support column 3041 are equipped with a lifting column 305 and a screw jack 306. The screw jack 306 is driven by a hydraulic motor 307 and is located below and connected to the lifting column 305 to drive it up or down. A support platform is installed at the upper end of the lifting column 305. The lifting column 305 is a load-bearing structure that can move vertically inside the support column. Specifically, it can be implemented using a rectangular cross-section steel column and a guide groove. Its function is to replace manual adjustment with mechanical transmission, achieving automated control of the support height. The screw jack 306 is a lifting mechanism driven by a motor to rotate a screw. Specifically, it can be implemented using a combination of a servo motor and a ball screw. Its function is to convert rotational motion into linear displacement of the lifting column 305 through precise screw transmission, ensuring the accuracy and stability of height adjustment.

[0069] Specifically, the screw jack 306 drives the screw to rotate via a motor, which in turn moves the lifting column 305 vertically. The support platform rises and falls synchronously with the lifting column 305, forming an adjustable support plane. The symmetrical layout of the left and right lifting support columns 3041 allows the height of the two support platforms to be adjusted independently or synchronously, thus adapting to the clamping requirements of workpieces of different sizes. The rigid transmission connection between the lifting column 305 and the screw jack 306 avoids the creep problem that may exist in traditional hydraulic lifting, ensuring a constant support height during processing.

[0070] Through the above technical solution, this application solves the problem of the inability to automatically adjust the support height. Precise height control is achieved through a mechanical transmission structure, ensuring a uniform distribution of support force during workpiece clamping. The dual-sided independent adjustment function can handle irregular deformation of the workpiece, avoiding processing vibrations caused by insufficient support on one side, and improving processing accuracy and equipment versatility.

[0071] In some embodiments, for example Figure 10 and Figure 11As shown, the tail clamping device 4 includes a tail support base 401, a second motor 2032 screw drive assembly, a third motor 2027 screw drive assembly, a movable seat 404, a fixed bracket 405, a third hydraulic cylinder 406, and a pressure plate 407. A linear guide rail is provided on the tail support base 401, and a sliding groove is provided at the bottom of the movable seat 404. The movable seat 404 is slidably mounted on the tail support base 401 through the cooperation of the linear guide rail and the sliding groove. A set of lifting support devices 3 is slidably mounted on the tail support base 401 and located in front of the movable seat 404. On the side, a fixed bracket 405 is fixedly installed on a movable seat 404. A pressing support is provided on the top surface of the fixed bracket 405. A pressure plate 407 is hinged to the pressing support. A third hydraulic cylinder 406 is vertically fixedly connected below the top surface of the fixed bracket 405, and the free end of the piston rod of the third hydraulic cylinder 406 is hinged to the end of the pressure plate 407. The second motor 2032 screw drive assembly and the third motor 2027 screw drive assembly are both installed on the tail support base 401 and are used to drive the movable seat 404 and the lifting support device 3 to move on the linear guide rail, respectively.

[0072] The tail support base 401 is the basic structure supporting the tail clamping device 4, providing a guide reference for the horizontal movement of the moving seat 404 and the lifting support device 3. The second motor 2032 screw drive assembly is a transmission mechanism composed of a servo motor and a ball screw. Specifically, it can be implemented by connecting the servo motor to the precision ball screw via a coupling, used to precisely control the displacement of the moving seat 404 on the linear guide rail. The third motor 2027 screw drive assembly is an independent drive unit with the same structure as the second assembly. Specifically, it can be a combination of a servo motor and a screw of the same specifications, used to independently adjust the position of the lifting support device 3. The clamping support is a support structure located at the top of the fixed bracket 405. Specifically, it can be a casting with a hinge hole, providing a rotation fulcrum for the pressure plate 407. The hinge structure between the third hydraulic cylinder 406 and the pressure plate 407 refers to the mechanism that connects the cylinder piston rod to the end of the pressure plate 407 via a pin shaft. Specifically, it can be a double-eared hydraulic cylinder connected to a U-shaped clamping plate, forming a lever-type clamping force amplification mechanism.

[0073] Specifically, after the workpiece is hoisted into the fixture, the second motor 2032's screw drive assembly starts, driving the movable seat 404 to move along the linear guide rail of the tail support base 401 to a preset position. The third motor 2027's screw drive assembly synchronously drives the lifting support device 3 to move, forming an adjustable clamping area with the movable seat 404. After the fixed bracket 405 is positioned with the movable seat 404, the piston rod of the third hydraulic cylinder 406 extends, pushing the pressure plate 407 to rotate and press down around the hinge point of the clamping support, converting the cylinder output force into a vertical clamping force through the lever principle. After the pressure plate 407 contacts the workpiece, the hydraulic system maintains oil pressure to keep the clamping force constant. When it is necessary to release the workpiece, the hydraulic cylinder piston rod retracts, driving the pressure plate 407 to rotate in the opposite direction and detach from the workpiece surface. The lifting support device 3 on the front side of the movable seat 404 is synchronously adjusted in position under the drive of the third motor 2027's screw, ensuring that the workpiece receives multi-point balanced support during the clamping process.

[0074] Through the above technical solutions, this application achieves automatic horizontal position adjustment of the tail clamping device 4, enabling the fixture to adapt to the clamping requirements of turntable workpieces of different lengths. The combination of hydraulic cylinders and lever structures ensures clamping force while reducing energy consumption. The linkage control between the moving seat 404 and the lifting support device 3 provides stable multi-point support for the workpiece during processing, preventing deformation caused by uneven force. The independent operation of the two sets of motor screw drive components allows the fixture to quickly adjust the clamping distance, significantly shortening the preparation time during workpiece changeovers.

[0075] Other components and operations of the high-altitude work platform turntable machining fixture according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A high -level platform turntable machine processing fixture, characterized in that, include: The machine tool worktable and the front-end rotary clamping device, the lifting support device and the tail clamping device installed on the machine tool worktable; The front-end rotary clamping device is arranged at the front of the machine tool worktable. There are two sets of lifting support devices, one set is arranged in the middle of the machine tool worktable, and the other set is arranged together with the tail clamping device at the rear of the machine tool worktable. The front-end rotary clamping device, the lifting support device and the tail clamping device can automatically cooperate to clamp the main arm of the aerial work platform.

2. The aerial work platform turret machining fixture of claim 1, wherein, The front-end rotary clamping device includes a support base, a front-end vertical positioning clamping device, and a front-end horizontal positioning clamping device. The front-end vertical positioning clamping device is slidably mounted on the support base and can move back and forth. The front-end horizontal positioning clamping device is slidably mounted on the front side of the front-end vertical positioning clamping device and can move up and down.

3. The aerial work platform turntable machining fixture of claim 2, wherein, The front-end rotary clamping device includes a housing, a column, a rotating arm, a rotating shaft, a rotary motor, and a first hydraulic cylinder. The rotating shaft is vertically fixedly inserted into the middle of the housing, and the housing is sleeved on the rotating shaft. One end of the rotating arm is installed inside the housing and sleeved on the rotating shaft. The rotary motor is installed on the housing and is connected to the rotating arm in a transmission manner. The first hydraulic cylinder is vertically installed inside the housing, and the free end of the piston rod of the first hydraulic cylinder is hinged to the bottom surface of the housing.

4. The aerial work platform turret machining fixture of claim 3, wherein, The support base is provided with a linear guide rail and a first motor and a first lead screw that are in transmission cooperation; the bottom of the column is provided with a sliding groove, and the column is slidably assembled on the support base through the cooperation of the linear guide rail and the sliding groove; the first motor is connected to the bottom surface of the column through the first lead screw to drive the column to move back and forth.

5. The aerial work platform turret machining fixture of claim 3, wherein, The front-end rotary clamping device further includes a first gear and a second gear; the first gear is installed on the free end of the drive shaft of the rotary motor, and the second gear is sleeved on the rotary shaft and fixedly connected to the rotary arm, and the first gear meshes with the second gear.

6. The aerial work platform turret machining fixture of claim 3, wherein, The front-end lateral positioning and clamping device includes a lateral positioning base, a second motor, a second lead screw, a second hydraulic cylinder, a positioning block, and a clamping block. The lateral positioning base has a lateral mounting groove. The second motor is installed at one end of the lateral mounting groove, and the second lead screw is located in the lateral mounting groove. The second motor and the second lead screw are driven together. The positioning block is drivenly connected to the second lead screw. The second hydraulic cylinder is installed at the other end of the lateral mounting groove, and the piston rod of the second hydraulic cylinder extends into the lateral mounting groove. The clamping block is fixedly installed at the free end of the piston rod of the second hydraulic cylinder.

7. The aerial work platform turret machining fixture of claim 6, wherein, The front side of the column is vertically provided with a linear guide rail and a third motor and a third lead screw that are connected for transmission; the bottom of the horizontal positioning base is provided with a sliding groove, and the horizontal positioning base is slidably mounted on the front side of the column through the linear guide rail and the sliding groove. The third motor is connected to the bottom of the horizontal positioning base through the third lead screw to drive the horizontal positioning base to move up and down.

8. The aerial work platform turntable machining fixture of claim 3, wherein, The front-end rotary clamping device also includes a manual support assembly; two sets of the manual support assembly are provided, and a support platform is provided on the front side of the column. The two sets of manual support assemblies are installed side by side and spaced apart on the support platform. The manual support assembly includes a manual support base and a manual support rod. The manual support rod is vertically screwed to the manual support base. The height of the manual support rod can be adjusted by rotating the manual support rod.

9. The aerial work platform turret machining fixture of claim 8, wherein, The manual support rod is equipped with an adjustment handle; the support platform is equipped with a linear guide rail, and the bottom of the manual support seat is equipped with a sliding groove. The manual support assembly can move on the linear guide rail by cooperating with the sliding groove.

10. The aerial work platform turret machining fixture of claim 1, wherein, The lifting support device includes a lifting support base, a first motor screw drive assembly, a left lifting support assembly, and a right lifting support assembly. A linear guide rail is provided on the lifting support base. The left and right lifting support assemblies are slidably mounted on the linear guide rail. Two sets of the first motor screw drive assemblies are provided and are both installed on the lifting support base. The two sets of the first motor screw drive assemblies are used to drive the left and right lifting support assemblies to move on the linear guide rail, respectively.

11. The aerial work platform turret machining fixture of claim 10, wherein, The left lifting support assembly includes a left lifting support column, a pushing cylinder, a clamping column, and a left turning cylinder; the left lifting support column is provided with a left horizontal mounting seat, the piston rod of the pushing cylinder is kinetically connected to the clamping column and is mounted on the left horizontal mounting seat, and the left turning cylinder is fixedly mounted on the left horizontal mounting seat.

12. The machining fixture for a high-altitude work platform turntable according to claim 11, characterized in that, The right lifting support assembly includes a right lifting support column, a fourth motor, a positioning column, and a right corner cylinder; a right horizontal mounting base is provided on the right lifting support column, the drive shaft of the fourth motor is connected to the positioning column and is mounted on the right horizontal mounting base, and the right corner cylinder is fixedly mounted on the right horizontal mounting base.

13. The aerial work platform turret machining fixture of claim 12, wherein, Both the left and right lifting support columns are equipped with lifting columns and screw jacks. The screw jacks are driven by hydraulic motors and are located below the lifting columns and are connected to the lifting columns to drive the lifting columns to rise or fall. A support platform is installed at the upper end of the lifting columns.

14. The aerial work platform turret machining fixture of claim 10, wherein, The tail clamping device includes a tail support base, a second motor screw drive assembly, a third motor screw drive assembly, a movable seat, a fixed bracket, a third hydraulic cylinder, and a pressure plate. A linear guide rail is provided on the tail support base, and a sliding groove is provided at the bottom of the movable seat. The movable seat is slidably mounted on the tail support base through the cooperation of the linear guide rail and the sliding groove. A set of lifting support devices is slidably mounted on the tail support base and located in front of the movable seat. The fixed bracket is fixedly installed on the movable seat, and a clamping support is provided on the top surface of the fixed bracket. The pressure plate is hinged to the clamping support. The third hydraulic cylinder is vertically fixed below the top surface of the fixed bracket, and the free end of the piston rod of the third hydraulic cylinder is hinged to the end of the pressure plate. The second motor screw drive assembly and the third motor screw drive assembly are both mounted on the tail support base and are used to drive the movable seat and the lifting support devices to move on the linear guide rail, respectively.

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