Aerial work platform jib machining fixture

Abstract

The utility model discloses a kind of aerial work platform boom machine processing clamps, comprising: machine tool workstation and install horizontal positioning device, guiding device, rotating pressure device, floating support, first group clamping device, second group clamping device, support platform, support seat and centering device on the machine tool workstation.This application realizes the automation clamping and accurate positioning of boom workpiece, significantly improves clamping efficiency.The use of two-way centering device and guiding device ensures the consistency of workpiece axis and processing reference, reduces positioning error.The combination structure of floating support and rigid support seat effectively suppresses processing vibration, avoids workpiece deformation.The synergistic effect of multiple clamping devices enhances clamping stability, suitable for the processing needs of different size workpieces.

Description

Technical Field

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

[0002] In recent years, as aerial work platforms have developed towards higher heights, their outrigger structures have become increasingly diverse. Due to significant differences in the cross-sectional dimensions of different outrigger models, traditional clamping methods have many shortcomings. In existing technologies, operators must manually use pressure plates and shims to clamp the workpiece. This method is not only labor-intensive but also inefficient, severely impacting production efficiency.

[0003] Existing clamping technologies suffer from the following major technical drawbacks: First, mechanical clamps rely entirely on manual operation, requiring operators to frequently adjust and tighten workpieces, resulting in high labor intensity. Second, traditional clamps lack effective horizontal positioning capabilities, necessitating operators to repeatedly align the workpiece along the machine tool's X-axis using centers—a time-consuming and inaccurate process that also introduces workpiece vibration during machining. Third, existing clamps employ a pressure plate and lead screw clamping method, requiring operators to tighten nuts individually with wrenches, a cumbersome operation that makes it difficult to ensure uniform force distribution at each clamping point. Finally, the lack of an auxiliary support system makes workpieces prone to deformation during clamping, with vibration during machining being particularly prominent, severely impacting machining accuracy and surface quality. Summary of the Invention

[0004] In view of this, the present invention provides a machining fixture for an aerial work platform extension arm, which has the advantages of reducing labor intensity, improving clamping efficiency, ensuring positioning accuracy, achieving uniform force distribution, and reducing workpiece deformation.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A machining fixture for an aerial work platform extension arm includes: a machine tool worktable and a horizontal positioning device, a guiding device, a rotary clamping device, a floating support, a first set of clamping devices, a second set of clamping devices, a support platform, a support base, and a centering device mounted on the machine tool worktable.

[0007] The machine tool includes a horizontal positioning device installed at the front of the machine tool table, a second set of clamping devices installed in the middle of the machine tool table, and a front mounting area between the horizontal positioning device and the second set of clamping devices. Two sets of centering devices are provided: one set is installed at the rear of the machine tool table, with the area between it and the second set of clamping devices forming the rear mounting area; the other set is installed in the front mounting area. Two sets of guiding devices are provided, one in the front mounting area and one in the rear mounting area. Two sets of floating supports are provided, spaced apart in the front mounting area. Two sets of support seats are provided, one in the front mounting area and one in the rear mounting area. The rotary clamping device, the first set of clamping devices, and the support platform are all installed in the front mounting area.

[0008] Preferably, the horizontal positioning device includes a hydraulic cylinder, a first linear guide rail, a column, a motor, a second linear guide rail, a lead screw and nut pair, a horizontal slider, and a tensioning cylinder; the column is slidably mounted on the first linear guide rail, and the hydraulic cylinder is drivenly connected to the column; the second linear guide rail and the lead screw and nut pair are both vertically mounted on the front side of the column, the motor is located above the column and is drivenly connected to the lead screw and nut pair, the horizontal slider is slidably mounted on the second linear guide rail and is drivenly connected to the lead screw and nut pair; the tensioning cylinder is mounted on the front side of the horizontal slider.

[0009] Preferably, the centering device includes a base and a hydraulic motor, a planetary reducer, a first lead screw, two sets of sliders, two sets of clamping seats, a third linear guide rail, and a second lead screw mounted on the base. The hydraulic motor is driven by the planetary reducer, which is mounted in the middle of the base. Its left and right ends are driven by the first lead screw and the second lead screw, respectively. The two sets of sliders are spaced apart and slidably mounted on the third linear guide rail. Meanwhile, the left slider is driven by the first lead screw, and the right slider is driven by the second lead screw. The two sets of clamping seats are respectively mounted on the left and right sliders.

[0010] Preferably, the rotary clamping device includes a rotary assembly, a rotary column, a rotary cylinder, a clamping block, a fourth linear guide rail, a clamping cylinder, and a movable head; the rotary column is rotatably mounted on the rotary assembly, and the rotary cylinder drives the rotary assembly to drive the rotary column to rotate horizontally; the clamping cylinder and the fourth linear guide rail are both mounted on the front side of the rotary column, the clamping block is slidably mounted on the fourth linear guide rail and is drively connected to the clamping cylinder; the movable head is movably mounted on the lower side of the clamping block.

[0011] Preferably, the rotary assembly includes a rotating base, a top cover, a push rod, a cylindrical gear, and a drive shaft; the push rod, the cylindrical gear, and the drive shaft are all installed inside the rotating base, the drive shaft is placed vertically, the cylindrical gear is fitted on the drive shaft, the upper end of the drive shaft is fixedly connected to the top cover, the rotating column is installed on the top cover, a rack is provided on one side of the push rod, the rack meshes with the cylindrical gear, and the rotary cylinder is drivenly connected to the push rod.

[0012] Preferably, the support platform includes an electromagnetic chuck and a support, with the electromagnetic chuck mounted on the support.

[0013] Preferably, the support base includes two support rods, which are arranged horizontally and symmetrically in a vertical direction, and each support rod has a telescopically adjustable movable top rod inside it.

[0014] Preferably, the guiding device includes two guide rods, which are arranged symmetrically and vertically.

[0015] Preferably, both the first set of clamping devices and the second set of clamping devices include a pair of clamping assemblies arranged symmetrically from left to right. Each clamping assembly includes a support base and a clamping cylinder, with the clamping cylinder mounted on top of the support base.

[0016] Preferably, the machine tool worktable is provided with multiple T-slots, and each device and component can be detachably installed in the T-slots.

[0017] The beneficial effects of this utility model are as follows: Compared with the prior art, this application realizes automated clamping and precise positioning of extendable workpieces, significantly improving clamping efficiency. The combined use of the bidirectional centering device and the guiding device ensures the consistency between the workpiece axis and the machining datum, reducing positioning errors. The combined structure of the floating support and the rigid support seat effectively suppresses machining vibration and avoids workpiece deformation. The synergistic effect of multiple clamping devices enhances clamping stability and is suitable for machining workpieces of different sizes.

[0018] 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

[0019] Figure 1 This is a schematic diagram of the structure of the aerial work platform extension arm machining fixture (with extension arm) of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the aerial work platform extension arm machining fixture (without extension arm) of this utility model;

[0021] Figure 3This is a schematic diagram of the horizontal positioning device of this utility model;

[0022] Figure 4 This is a schematic diagram of the centering device of this utility model;

[0023] Figure 5 This is a schematic diagram of the rotary clamping device of this utility model;

[0024] Figure 6 This is a horizontal cross-sectional view of the rotary component of this utility model;

[0025] Figure 7 This is a longitudinal cross-sectional view of the rotary component of this utility model;

[0026] Figure 8 This is a schematic diagram of the support platform of this utility model;

[0027] Figure 9 This is a schematic diagram of the structure of the first clamping device of this utility model;

[0028] Figure 10 This is a schematic diagram of the structure of the second clamping device of this utility model.

[0029] Figure label:

[0030] 1. Machine tool worktable;

[0031] 2. Horizontal positioning device; 201. Hydraulic cylinder; 202. First linear guide rail; 203. Column; 204. Motor; 205. Second linear guide rail; 206. Lead screw and nut pair; 207. Horizontal slider; 208. Tensioning cylinder;

[0032] 3. Guiding device;

[0033] 4. Rotary clamping device; 401. Rotary assembly; 402. Rotary column; 403. Rotary cylinder; 404. Clamping block; 405. Fourth linear guide rail; 406. Clamping cylinder; 407. Moving head; 4011. Rotary base; 4012. Top cover; 4013. Push rod; 4014. Cylindrical gear; 4015. Drive shaft;

[0034] 5. Floating support; 6. First set of clamping devices;

[0035] 7. Support platform; 701. Electromagnetic chuck; 702. Support;

[0036] 8. Support base;

[0037] 9. Alignment device; 901. Base; 902. Hydraulic motor; 903. Planetary reducer; 904. First lead screw; 905. Slider; 906. Clamping seat; 907. Third linear guide; 908. Second lead screw;

[0038] 10. Second set of clamping devices. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] The following is for reference. Figures 1 to 10 This invention describes the machining fixture for the boom extension machine of the aerial work platform in the embodiments of this utility model.

[0042] This application discloses a machining fixture for an aerial work platform extension boom, comprising: a machine tool worktable 1 and a horizontal positioning device 2, a guiding device 3, a rotary clamping device 4, a floating support 5, a first set of clamping devices 6, a second set of clamping devices 10, a support platform 7, a support base 8, and a centering device 9 mounted on the machine tool worktable 1; the horizontal positioning device 2 is mounted at the front of the machine tool worktable 1, the second set of clamping devices 10 is mounted at the middle of the machine tool worktable 1, and the worktable area between the horizontal positioning device 2 and the second set of clamping devices 10 is the front mounting area; two sets of centering devices 9 are provided, one set... The centering device 9 is installed at the rear of the machine tool worktable 1, and the worktable area between it and the second set of clamping devices 10 is the rear installation area. Another set of centering devices 9 is installed in the front installation area. Two sets of guide devices 3 are provided, and the two sets of guide devices 3 are respectively located in the front installation area and the rear installation area. Two sets of floating supports 5 are provided, and the two sets of floating supports 5 are spaced apart in the front installation area. Two sets of support seats 8 are provided, and the two sets of support seats 8 are respectively located in the front installation area and the rear installation area. The rotary clamping device 4, the first set of clamping devices 6, and the support platform 7 are all installed in the front installation area.

[0043] The horizontal positioning device 2 is a positioning mechanism that uses a hydraulic cylinder 201 to drive the column 203 to move along the guide rail, and is used to precisely adjust the workpiece position in the horizontal direction. The centering device 9 is a clamping mechanism with bidirectional synchronous adjustment function, which is used to synchronously adjust the positions of the clamping seats 906 on both sides to complete the workpiece axis calibration. The guiding device 3 is a symmetrically arranged guiding assembly that provides a directional guiding path for workpiece hoisting. The floating support 5 is a support component with elastic adjustment function, which is used to dynamically compensate for deformation during workpiece clamping. The support base 8 is a rigid support structure with a movable top rod, which is used to provide stable multi-point support.

[0044] Specifically, for example Figure 1 and Figure 2 As shown, the machine tool worktable 1 serves as the basic support platform. The front mounting area is formed by the front horizontal positioning device 2 and the second set of clamping devices 10 in the middle, which, together with the dual-section layout of the rear mounting area, establishes a spatial positioning reference. Two sets of centering devices 9 are placed in the front and rear mounting areas respectively. A hydraulic motor 902 drives the double lead screws to move synchronously, causing the clamping seats 906 on both sides to move towards each other to complete the workpiece axis alignment. Dual guide devices 3 are vertically arranged in the front and rear areas to guide the workpiece accurately into the clamping position along a predetermined path. Two sets of floating supports 5 in the front mounting area are hydraulically driven to extend and retract the push rods, adjusting the support height in real time to counteract workpiece deformation. Support seats 8 are symmetrically arranged in the front and rear areas, forming multi-point rigid support through the extension and retraction adjustment of the movable push rods. The rotary clamping device 4 drives the clamping block 404 to move along the linear guide rail via the cylinder 201, achieving multi-directional workpiece fixation through the adsorption effect of the electromagnetic chuck 701. The first set of clamping devices 6 and the second set of clamping devices 10 work together, using the cylinder 201 to drive the clamping block to laterally clamp the workpiece. The machine tool worktable 1 is provided with multiple T-slots, and each device and component can be detachably installed in the T-slots.

[0045] Compared with existing technologies, traditional manual clamps rely on manual adjustment of the pressure plate for clamping, resulting in low positioning accuracy and poor operating efficiency. This solution achieves bidirectional automatic positioning of the workpiece in both horizontal and axial directions through the coordinated action of the horizontal positioning device 2 and the centering device 9, eliminating manual alignment errors. Existing technologies lack dynamic support structures, leading to easy vibration and deformation of the workpiece during processing. This solution, through the combined layout of the floating support 5 and the rigid support seat 8, ensures support stability and adaptively compensates for workpiece deformation. Furthermore, traditional clamps cannot adapt to workpieces with different cross-sectional dimensions, while this solution expands the applicability of the clamp through the combined design of the adjustable rotary clamping device 4 and the multi-position clamping device.

[0046] Through the above technical solutions, this application achieves automated clamping and precise positioning of extendable workpieces, significantly improving clamping efficiency. The combined use of the bidirectional centering device 9 and the guiding device 3 ensures the consistency between the workpiece axis and the machining datum, reducing positioning errors. The combined structure of the floating support 5 and the rigid support seat 8 effectively suppresses machining vibration and avoids workpiece deformation. The synergistic effect of multiple clamping devices enhances clamping stability and is suitable for machining workpieces of different sizes.

[0047] In some embodiments, for example Figure 3 As shown, the horizontal positioning device 2 includes a hydraulic cylinder 201, a first linear guide rail 202, a column 203, a motor 204, a second linear guide rail 205, a lead screw and nut pair 206, a horizontal slider 207, and a tensioning cylinder 208. The column 203 is slidably mounted on the first linear guide rail 202, and the hydraulic cylinder 201 is drivenly connected to the column 203. The second linear guide rail 205 and the lead screw and nut pair 206 are both vertically mounted on the front side of the column 203. The motor 204 is located above the column 203 and is drivenly connected to the lead screw and nut pair 206. The horizontal slider 207 is slidably mounted on the second linear guide rail 205 and is drivenly connected to the lead screw and nut pair 206. The tensioning cylinder 208 is mounted on the front side of the horizontal slider 207.

[0048] The column 203 is a supporting component for the vertical adjustment mechanism, and can be implemented using a rectangular cross-section steel component. Its front side serves as the mounting reference surface for the second linear guide 205. The lead screw and nut pair 206 is a transmission mechanism that converts rotary motion into linear motion, and can be implemented using a ball screw pair. It is driven by a motor 204 to adjust the vertical position of the horizontal slider 207. The tensioning cylinder 208 is a self-locking hydraulic actuator, and can be implemented using a single-acting spring return cylinder 201. It is used to apply radial support force to the inner stop of the extension arm.

[0049] Specifically, the hydraulic cylinder 201 drives the column 203 to move horizontally along the first linear guide 202 to a predetermined position, so that the front side of the column 203 forms an initial positioning reference with the workpiece. The motor 204 drives the horizontal slider 207 to move vertically along the second linear guide 205 through the drive screw nut pair 206, so that the height of the tensioning cylinder 208 matches the inner wall structure of the workpiece. When the tensioning cylinder 208 contacts the inner wall of the workpiece, the hydraulic system controls the tensioning cylinder 208 to output radial thrust, forming a three-point support structure. The horizontal movement of the column 203 and the vertical movement of the horizontal slider 207 constitute a two-dimensional positioning system, realizing automatic alignment of the workpiece in the horizontal direction. The supporting force of the tensioning cylinder 208 is transmitted to the column 203 through the horizontal slider 207, forming a rigid support structure to suppress processing vibration.

[0050] Through the above technical solution, this application achieves automatic horizontal positioning and alignment of the workpiece, eliminating the need for manual operation of the center point. The vertical adjustment function of the horizontal slider 207 allows the tensioning cylinder 208 to adapt to the internal support structure of workpieces of different heights, forming a stable three-point support system. The electromechanical-hydraulic composite drive system ensures positioning accuracy and support rigidity, significantly reducing vibration amplitude during processing. The coordinated movement of the column 203 and the horizontal slider 207 constructs a two-dimensional positioning space, enabling precise control of the workpiece clamping position and improving processing stability.

[0051] In some embodiments, for example Figure 4 As shown, the centering device 9 includes a base 901 and a hydraulic motor 902, a planetary reducer 903, a first lead screw 904, two sets of sliders 905, two sets of clamping seats 906, a third linear guide rail 907, and a second lead screw 908 mounted on the base 901. The hydraulic motor 902 is connected to the planetary reducer 903. The planetary reducer 903 is mounted in the middle of the base 901, and its left and right ends are connected to the first lead screw 904 and the second lead screw 908, respectively. The two sets of sliders 905 are spaced apart and slidably mounted on the third linear guide rail 907. At the same time, the left slider 905 is connected to the first lead screw 904, and the right slider 905 is connected to the second lead screw 908. The two sets of clamping seats 906 are mounted on the left and right sliders 905, respectively.

[0052] Among them, the planetary reducer 903 is a power transmission device with a planetary gear structure, which can be implemented by a three-stage planetary gear reducer to increase output torque and improve motion control accuracy. The clamping seat 906 is a rigid component that bears the clamping force, which can be implemented by a cast iron base with wear-resistant pads, for direct contact with the workpiece surface and transmission of clamping force.

[0053] Specifically, the hydraulic motor 902 drives the planetary reducer 903 to output bidirectional rotational power. The left and right output ends of the planetary reducer 903 are mechanically connected to the first lead screw 904 and the second lead screw 908, respectively. When the hydraulic motor 902 starts, the first lead screw 904 and the second lead screw 908 generate synchronous rotational motions in opposite directions. The left slider 905 achieves leftward translation through the threaded pair of the first lead screw 904, and the right slider 905 achieves rightward translation through the threaded pair of the second lead screw 908. The two sets of sliders 905 maintain a linear motion trajectory under the constraint of the third linear guide 907, driving the clamping seat 906 to form a symmetrical clamping action. The multi-stage reduction characteristics of the planetary reducer 903 ensure that the output speed and torque match the clamping requirements, the transmission accuracy of the ball screw pair eliminates backlash errors during the motion process, and the high rigidity support of the double-row roller linear guide effectively suppresses deformation caused by lateral loads.

[0054] Through the above technical solution, this application achieves automatic centering and positioning of the workpiece in the horizontal plane. During clamping, the left and right clamping forces maintain dynamic balance, avoiding workpiece displacement caused by unilateral pressure. The synergistic effect of the planetary reducer 903 and the double lead screw makes the movement speed control of the clamping seat 906 faster and more precise, meeting the requirements for rapid positioning while preventing impact loads. The preload structure of the ball screw pair eliminates backlash, effectively ensuring the repeatability and accuracy of the clamping position.

[0055] In some embodiments, for example Figure 5 , Figure 6 and Figure 7 As shown, the rotary clamping device 4 includes a rotary assembly 401, a rotary column 402, a rotary cylinder 403, a clamping block 404, a fourth linear guide rail 405, a clamping cylinder 406, and a movable head 407. The rotary column 402 is rotatably mounted on the rotary assembly 401, and the rotary cylinder 403 drives the rotary assembly 401 to drive the rotary column 402 to rotate horizontally. The clamping cylinder 406 and the fourth linear guide rail 405 are both mounted on the front side of the rotary column 402, and the clamping block 404 is slidably mounted on the fourth linear guide rail 405 and is connected to the clamping cylinder 406 in a transmission manner. The movable head 407 is movably mounted on the lower part of the clamping block 404. Side view; The rotating assembly 401 includes a rotating base 4011, a top cover 4012, a push rod 4013, a cylindrical gear 4014, and a drive shaft 4015; the push rod 4013, the cylindrical gear 4014, and the drive shaft 4015 are all installed inside the rotating base 4011. The drive shaft 4015 is placed vertically, and the cylindrical gear 4014 is fitted on the drive shaft 4015. The upper end of the drive shaft 4015 is fixedly connected to the top cover 4012. The rotating column 402 is installed on the top cover 4012. A rack is provided on one side of the push rod 4013, and the rack meshes with the cylindrical gear 4014. The rotating cylinder 403 is connected to the push rod 4013 for transmission.

[0056] The rotary assembly 401 is a transmission mechanism that enables the horizontal rotation of the rotating column 402. Specifically, it can be implemented using a gear and rack meshing structure, converting the linear motion of the push rod 4013 into the rotational motion of the gears. The rotary cylinder 403 is the power source driving the rotary assembly 401, and can be implemented using a double-acting hydraulic cylinder. The stroke of the cylinder 201 controls the linear movement distance of the push rod 4013. The clamping block 404 is a clamping component that directly contacts the workpiece. Specifically, it can be implemented using a modular design with a movable head 407, increasing the contact area through the adaptive adjustment of the movable head 407. The movable head 407 is a flexible contact component at the end of the clamping block 404, compensating for workpiece surface unevenness through multi-directional degrees of freedom.

[0057] Specifically, when a workpiece needs to be hoisted, the rotary cylinder 403 pushes the push rod 4013 outward. The rack of the push rod 4013 drives the cylindrical gear 4014 to rotate counterclockwise, causing the transmission shaft 4015 and the top cover 4012 to rotate, thus causing the rotating column 402 to deviate from the workpiece hoisting path. After the workpiece is in place, the rotary cylinder 403 retracts, pulling the push rod 4013 back, and the rack drives the gear to rotate clockwise, resetting the rotating column 402 to the clamping position. After the clamping cylinder 406 is activated, it pushes the clamping block 404 down along the fourth linear guide rail 405. When the movable head 407 contacts the workpiece surface, it automatically adjusts its posture to form surface contact clamping. The rotary assembly 401 adopts a fully enclosed structure, and the gear and rack transmission pair is sealed inside the rotating base 4011 to prevent machining debris from intruding and affecting transmission accuracy. The transmission shaft 4015 and the top cover 4012 are rigidly connected by flanges to ensure the structural stability of the rotating column 402 when carrying the workpiece.

[0058] Through the above technical solution, this application achieves automated angle adjustment of the clamping mechanism, allowing operators to complete avoidance and reset actions without manually operating the rotating components. The active vertical adjustment function of the clamping block 404 can quickly adapt to workpieces of different sizes, and the adaptive contact design of the movable head 407 transforms point contact into surface contact, significantly reducing vibration amplitude during processing. The enclosed rotary assembly 401 avoids the influence of external contaminants on transmission accuracy, ensuring positioning stability during long-term use.

[0059] In some embodiments, for example Figure 8 As shown, the support platform 7 includes an electromagnetic chuck 701 and a support 702, with the electromagnetic chuck 701 mounted on the support 702. The electromagnetic chuck 701 is a device that uses electromagnetic force to attract and fix workpieces. Specifically, it can be implemented using a permanent magnet or electrically controlled electromagnet. After being energized, it generates magnetic force that directly acts on the workpiece surface to achieve rigid fixation.

[0060] Specifically, the electromagnetic chuck 701 activates the magnetic field by energizing it, causing the workpiece to be attracted to its surface, eliminating the gap contact problem between the traditional pressure plate and the workpiece. The support 702 serves as the mounting base for the electromagnetic chuck 701, ensuring uniform magnetic force distribution and preventing localized stress concentration through its rigid support structure. During workpiece placement, the electromagnetic chuck 701 is de-energized for easy position adjustment; once the workpiece is positioned, energizing it generates magnetic force for instantaneous fixation, while the rigid structure of the support 702 effectively transmits cutting forces during machining, preventing workpiece displacement due to deformation under stress.

[0061] Through the above technical solutions, this application realizes fully automatic and rapid fixation of the workpiece during the processing. The electromagnetic adsorption force is uniformly applied to the bottom surface of the workpiece, effectively suppressing the displacement caused by cutting vibration. The rigid support structure of the support 702 compensates for the insufficient rigidity of the workpiece itself and prevents processing deformation. The magnetic fixing method eliminates the risk of mechanical damage to the workpiece surface caused by the traditional clamping mechanism and improves the stability of processing quality.

[0062] In some embodiments, for example Figure 1 and Figure 2 As shown, the support base 8 includes two support rods, which are horizontally symmetrically arranged vertically. Each support rod contains a retractable and adjustable top rod. The support rods are rod-shaped components forming the basic structure of the support base 8, and can be made of metal. Their horizontal and vertical symmetrical arrangement creates a stable support plane, and the symmetrical layout ensures balanced force on both sides, preventing workpiece displacement or deformation due to uneven force on one side. The adjustable top rod is a retractable component built into the support rod. Its extension function can be achieved through hydraulic drive or a threaded adjustment structure. By changing the extension length of the adjustable top rod, it can actively conform to the lower surface of the workpiece, dynamically adjusting the support height according to the actual shape and size of the workpiece, thereby providing variable vertical support force.

[0063] Specifically, two horizontally symmetrically arranged vertical support rods form a stable basic support frame. The symmetrical layout ensures even force distribution on both sides of the workpiece, eliminating stress concentration caused by unilateral support. The movable push rod inside the support rods, through telescopic adjustment, forms a dynamically adjustable auxiliary support point in the vertical direction. When the workpiece is placed on the support base 8, the movable push rod adjusts its height according to the contour of the workpiece's lower surface, ensuring full contact between the support surface and the workpiece. This counteracts the bending deformation tendency of the workpiece due to its own weight or machining force during clamping. During the machining stage, the rigid support of the movable push rod suppresses workpiece vibration and reduces displacement fluctuations during machining.

[0064] Through the above technical solution, this application can dynamically adjust the support height according to the actual size and shape of the workpiece, ensuring that the workpiece is subjected to uniform force during clamping, avoiding bending deformation caused by insufficient support, and reducing vibration transmission through rigid support during processing, thereby improving processing accuracy and stability.

[0065] In some embodiments, for example Figure 1 and Figure 2 As shown, the guiding device 3 includes two guide rods, which are symmetrically arranged vertically. Each guide rod is a rod-shaped structure used to guide the workpiece to move in a predetermined direction; specifically, it can be implemented using cylindrical rods, the surface of which is hardened to improve wear resistance.

[0066] Specifically, when the workpiece is hoisted into the fixture, two guide rods guide the workpiece vertically from the left and right sides respectively, ensuring the workpiece accurately enters the predetermined clamping position along a straight path. The symmetrical layout cancels out the horizontal guiding forces acting on the workpiece, preventing offset during clamping. The vertically positioned guide rods are adapted to the workpiece's cross-sectional shape, accommodating reach arms of varying widths. During machining, the two guide rods form a rigid support structure, suppressing lateral vibrations of the workpiece caused by cutting forces.

[0067] Through the above technical solution, this application solves the problem of positioning deviation caused by the lack of effective guidance for the workpiece, shortens the clamping and adjustment time, and improves machining stability. The symmetrical guide rod layout automatically centers the workpiece in the horizontal direction, reducing manual calibration steps. The double-rod vertical support structure enhances the rigidity of the workpiece, suppresses cutting vibration, and ensures machining accuracy.

[0068] In some embodiments, for example Figure 9 and Figure 10 As shown, the first set of clamping devices 6 and the second set of clamping devices 10 each include a pair of clamping components arranged symmetrically from left to right. The clamping components include a support base 901 and a clamping cylinder 201, with the clamping cylinder 201 mounted on top of the support base 901.

[0069] The symmetrically arranged clamping components consist of two sets of clamping units mirror-distributed around the workpiece axis. This can be achieved using a dual-cylinder synchronous drive system, forming a symmetrical force application structure to balance the clamping torque. The clamping cylinder 201 is a hydraulically driven linear actuator, specifically a double-acting single-piston rod cylinder 201, which connects to the control system via hydraulic lines to achieve automatic clamping.

[0070] Specifically, once the workpiece is in place, the hydraulic system simultaneously supplies oil to the left and right clamping cylinders 201, pushing the piston rods to extend and abut against the workpiece's side surfaces. The symmetrically arranged clamping cylinders 201 apply equal clamping forces synchronously, aligning the workpiece axis with the fixture's centerline. The support base 901 is bolted to the worktable, forming a stable reaction force support point to prevent displacement during clamping. The vertical installation of the clamping cylinders 201 ensures the clamping force is perpendicular to the workpiece axis, eliminating lateral forces caused by clamping angle deviations.

[0071] Through the above technical solutions, this application solves the problems of low efficiency in manual operation and workpiece deformation caused by unbalanced clamping force. The hydraulically driven symmetrical clamping assembly achieves synchronous pressure from both sides, preventing workpiece axis misalignment. The vertical mounting structure of the rigid support base 901 and the hydraulic cylinder 201 ensures uniform transmission of clamping force and reduces workpiece vibration. The automated clamping process replaces the traditional manual nut tightening operation, reducing labor intensity and improving clamping efficiency.

[0072] Other components and operations of the aerial work platform outrigger 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.

[0073] 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.

[0074] 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 machining fixture for an aerial work platform extender arm, characterized in that, include: The machine tool worktable and the horizontal positioning device, guiding device, rotary clamping device, floating support, first set of clamping devices, second set of clamping devices, support platform, support base and centering device installed on the machine tool worktable; The horizontal positioning device is installed at the front of the machine tool worktable, the second set of clamping devices is installed in the middle of the machine tool worktable, the worktable area between the horizontal positioning device and the second set of clamping devices is the front mounting area, and two sets of centering devices are provided. One set of centering devices is installed at the rear of the machine tool worktable and the worktable area between it and the second set of clamping devices is the rear mounting area, and the other set of centering devices is installed in the front mounting area. Two sets of guiding devices are provided, and the two sets of guiding devices are respectively located in the front mounting area and the rear mounting area; two sets of floating supports are provided, and the two sets of floating supports are spaced apart in the front mounting area; two sets of support seats are provided, and the two sets of support seats are respectively located in the front mounting area and the rear mounting area; the rotary clamping device, the first set of clamping devices, and the support platform are all installed in the front mounting area.

2. The aerial work platform boom extension machine machining fixture according to claim 1, characterized in that, The horizontal positioning device includes a hydraulic cylinder, a first linear guide rail, a column, a motor, a second linear guide rail, a lead screw and nut pair, a horizontal slider, and a tensioning cylinder. The column is slidably mounted on the first linear guide rail, and the hydraulic cylinder is drivenly connected to the column. The second linear guide rail and the lead screw and nut pair are both vertically mounted on the front side of the column. The motor is located above the column and is drivenly connected to the lead screw and nut pair. The horizontal slider is slidably mounted on the second linear guide rail and is drivenly connected to the lead screw and nut pair. The tensioning cylinder is mounted on the front side of the horizontal slider.

3. The aerial work platform boom extension machine machining fixture according to claim 1, characterized in that, The centering device includes a base and a hydraulic motor, a planetary reducer, a first lead screw, two sets of sliders, two sets of clamping seats, a third linear guide rail, and a second lead screw mounted on the base. The hydraulic motor is connected to the planetary reducer, which is mounted in the middle of the base. Its left and right ends are respectively connected to the first lead screw and the second lead screw. The two sets of sliders are spaced apart and slidably mounted on the third linear guide rail. The left slider is connected to the first lead screw, and the right slider is connected to the second lead screw. The two sets of clamping seats are respectively mounted on the left and right sliders.

4. The aerial work platform boom extension machine machining fixture according to claim 1, characterized in that, The rotary clamping device includes a rotary assembly, a rotary column, a rotary cylinder, a clamping block, a fourth linear guide rail, a clamping cylinder, and a movable head. The rotary column is rotatably mounted on the rotary assembly, and the rotary cylinder drives the rotary assembly to rotate the rotary column horizontally. The clamping cylinder and the fourth linear guide rail are both mounted on the front side of the rotary column, and the clamping block is slidably mounted on the fourth linear guide rail and is connected to the clamping cylinder in a transmission manner. The movable head is movably mounted on the lower side of the clamping block.

5. The aerial work platform boom extension machine machining fixture according to claim 4, characterized in that, The rotary assembly includes a rotating base, a top cover, a push rod, a cylindrical gear, and a drive shaft. The push rod, the cylindrical gear, and the drive shaft are all installed inside the rotating base. The drive shaft is placed vertically, and the cylindrical gear is mounted on the drive shaft. The upper end of the drive shaft is fixedly connected to the top cover. The rotating column is installed on the top cover. A rack is provided on one side of the push rod, and the rack meshes with the cylindrical gear. The rotary cylinder is drivenly connected to the push rod.

6. The aerial work platform boom extension machine machining fixture according to claim 1, characterized in that, The support platform includes an electromagnetic chuck and a support, with the electromagnetic chuck mounted on the support.

7. The aerial work platform boom extension machine machining fixture according to claim 1, characterized in that, The support base includes two support rods, which are arranged horizontally and symmetrically vertically. Each support rod has a telescopically adjustable movable top rod inside it.

8. The aerial work platform boom extension machine machining fixture according to claim 1, characterized in that, The guiding device includes two guide rods, which are arranged symmetrically and vertically.

9. The aerial work platform boom extension machine machining fixture according to claim 1, characterized in that, Both the first set of clamping devices and the second set of clamping devices include a pair of clamping assemblies arranged symmetrically from left to right. Each clamping assembly includes a support base and a clamping cylinder, with the clamping cylinder mounted on top of the support base.

10. The aerial work platform boom extension machine machining fixture according to claim 1, characterized in that, The machine tool workbench is provided with multiple T-slots, and each device and component can be detachably installed in the T-slots.

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