A machining fixture for the main boom of an aerial work platform

Abstract

This utility model discloses a machining fixture for the main boom of an aerial work platform, comprising: a machine tool worktable and an end positioning and clamping device, a rotary clamping device, and a tail-side pushing and clamping device mounted on the machine tool worktable. The end positioning and clamping device, the rotary clamping device, and the tail-side pushing and clamping device are arranged sequentially at the front, middle, and rear of the machine tool worktable, and the three can automatically and collaboratively clamp the main boom of the aerial work platform. This application achieves automatic positioning and multi-point collaborative clamping of the main boom workpiece, eliminating positioning errors caused by manual operation. The hydraulic drive system ensures synchronous operation of each clamping device, shortening the clamping preparation time. The adaptive adjustment mechanism is compatible with workpieces of different specifications, reducing the number of tooling changes. The composite clamping method disperses contact stress, preventing clamping deformation of thin-walled structural parts. The multi-directional constraint mechanism effectively suppresses machining vibration and improves the positional accuracy of hole machining.

Description

Technical Field

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

[0002] In the field of aerial work platform manufacturing, the main boom, as a key load-bearing component, directly affects the overall performance of the machine due to its machining accuracy. Traditional main boom machining presents numerous technical challenges: First, due to the large variations in the main boom's cross-sectional dimensions, operators must frequently replace pads and adjust the pressure plate position, which is not only time-consuming and labor-intensive but also prone to clamping errors. Second, existing fixtures lack effective horizontal positioning capabilities, making workpiece alignment cumbersome and difficult to guarantee accuracy. Third, traditional lead screw and nut tightening methods require repeated manual tightening, increasing labor intensity and making it difficult to ensure consistent clamping force. Furthermore, the main boom is prone to vibration and deformation during machining, severely affecting machining accuracy and surface quality. These problems are particularly prominent in the machining of high-meter, large-amplitude aerial work platform main booms, necessitating the development of a specialized fixture capable of automatic positioning, multi-directional clamping, and deformation prevention. Summary of the Invention

[0003] In view of this, the present invention provides a machining fixture for the main boom of an aerial work platform, which has the advantages of improving clamping efficiency, ensuring positioning accuracy and reducing manual intervention.

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

[0005] A machining fixture for the main boom of an aerial work platform includes: a machine tool worktable and an end positioning and clamping device, a rotary clamping device, and a tail side pushing and clamping device mounted on the machine tool worktable.

[0006] The end positioning clamping device, the rotary clamping device, and the tail side push clamping device are arranged sequentially at the front, middle, and rear of the machine tool worktable, and the three can automatically work together to clamp the main arm of the aerial work platform.

[0007] Preferably, the end positioning and clamping device includes a horizontal tensioning device, a corner cylinder, a first pressure plate, and an end base; the horizontal tensioning device is installed on the front part of the upper surface of the end base, the corner cylinder is vertically installed on the side part of the upper surface of the end base, and the first pressure plate is horizontally fixedly installed on the free end of the rotating rod of the corner cylinder.

[0008] Preferably, the horizontal tensioning device includes: a tensioning cylinder, a housing, a guide post, a guide block, and a wedge; the housing has a through hole extending from front to back, the guide post and the wedge are placed side by side in the through hole, the tensioning cylinder is connected to the guide post in the through hole via a piston rod, a guide block is vertically arranged on the lower side wall of the housing, a transverse guide groove that mates with the guide block is opened on the lower bottom surface of the wedge, and an inclined surface is provided on the side of the guide post, the inclined surface mates with the side wedge surface of the wedge.

[0009] Preferably, the rotary clamping device includes a fixed base, a clamping arm, a rotary cylinder, and a second pressure plate; one end of the clamping arm is horizontally rotatably mounted on the upper end of the fixed base, the rotary cylinder is mounted on the other end of the clamping arm, and the second pressure plate is mounted on the free end of the piston rod of the rotary cylinder.

[0010] Preferably, the rotary clamping device further includes a round nut, which is screwed onto the upper end of the fixed end of the clamping arm to tighten and fix it when the clamping arm is rotated into position.

[0011] Preferably, the rotary clamping device further includes a handle, which includes a first handrail and a second handrail, and the first handrail and the second handrail are symmetrically arranged on the left and right sides of the clamping arm.

[0012] Preferably, the tail-side push-pressing device includes a tail base and a slide table. The tail-side push-pressing device also includes a horizontal tensioning device, a corner cylinder, and a first pressure plate. The slide table is slidably mounted on the tail base. The horizontal tensioning device is installed on the rear part of the upper surface of the slide table. The corner cylinder is vertically installed on the side of the upper surface of the slide table. The first pressure plate is horizontally fixedly installed on the free end of the rotating rod of the corner cylinder.

[0013] Preferably, the tail side push clamping device further includes a backing and a hydraulic cylinder; the backing is fixedly installed on the machine tool worktable and located on the rear side of the tail base, the hydraulic cylinder is horizontally fixedly installed on the backing, and the free end of the piston rod of the hydraulic cylinder is fixedly installed on the rear side of the slide.

[0014] The beneficial effects of this utility model are as follows: Compared with the prior art, this application achieves automatic positioning and multi-point coordinated clamping of the workpiece on the main arm, eliminating positioning errors caused by manual operation. The hydraulic drive system ensures synchronous operation of each clamping device, shortening the clamping preparation time. The adaptive adjustment mechanism is compatible with workpieces of different specifications, reducing the number of tooling changes. The compound clamping method disperses contact stress, preventing clamping deformation of thin-walled structural parts. The multi-directional constraint mechanism effectively suppresses machining vibration and improves the positional accuracy of hole machining.

[0015] 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

[0016] Figure 1 This is a structural schematic diagram of the machining fixture (with main boom) for the main boom of the aerial work platform according to this utility model;

[0017] Figure 2 This is a structural schematic diagram of the machining fixture for the main boom of an aerial work platform (without a main boom) according to this utility model;

[0018] Figure 3 This is a schematic diagram of the end positioning and clamping device of this utility model;

[0019] Figure 4 This is a structural schematic diagram of the horizontal tensioning device of this utility model (first-person perspective);

[0020] Figure 5 This is a structural schematic diagram of the horizontal tensioning device of this utility model (second view);

[0021] Figure 6 This is a cross-sectional view of the horizontal tensioning device of this utility model;

[0022] Figure 7 This is a schematic diagram of the rotary clamping device of this utility model;

[0023] Figure 8 This is a schematic diagram of the tail-side push-pressing device of this utility model.

[0024] Figure label:

[0025] 1. Machine tool worktable;

[0026] 2. End positioning and clamping device; 201. Horizontal tensioning device; 202. Corner cylinder; 203. First pressure plate; 204. End base; 2011. Tensioning cylinder; 2012. Housing; 2013. Guide post; 2014. Guide block; 2015. Wedge block;

[0027] 3. Rotary clamping device; 301. Fixed base; 302. Clamping arm; 303. Rotary cylinder; 304. Second pressure plate; 305. Round nut; 306. Handle;

[0028] 4. Tail-end side push-pressing device; 401. Tail-end base; 402. Slide table; 403. Backrest; 404. Hydraulic cylinder. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] The following is for reference. Figures 1 to 8 This invention describes the machining fixture for the main boom of an aerial work platform in an embodiment of the present invention.

[0032] This application discloses a machining fixture for the main boom of an aerial work platform, including: a machine tool worktable 1 and an end positioning and clamping device 2, a rotary clamping device 3, and a tail side push clamping device 4 installed on the machine tool worktable 1; the end positioning and clamping device 2, the rotary clamping device 3, and the tail side push clamping device 4 are arranged sequentially at the front, middle, and rear of the machine tool worktable 1, and the three can automatically cooperate to clamp the main boom of the aerial work platform.

[0033] The machine tool worktable 1 serves as the foundation platform supporting all clamping devices. It can be constructed from cast iron or welded steel structures and fixed to the foundation with anchor bolts, providing a stable clamping reference for the workpiece. The end positioning clamping device 2 is a clamping mechanism located at the starting end of the workpiece's feed direction. It establishes the workpiece's axial positioning reference and performs end-face clamping. The rotary clamping device 3 is a clamping mechanism with rotational adjustment capabilities, used for flexible clamping of the weakest area in the middle of the workpiece with adjustable angle. The tail-end side-push clamping device 4 is a clamping mechanism that can move along the workpiece's axis, used to compensate for workpiece length errors and apply lateral constraints. Automatic coordinated control involves synchronously driving multiple actuators through a hydraulic system. This can be achieved using a solenoid valve assembly in conjunction with a pressure sensor, ensuring that each clamping device completes its clamping action according to a preset timing sequence.

[0034] Specifically, the machine tool worktable 1 serves as a spatial positioning reference, forming a stable clamping system through a three-point layout. After the end positioning and clamping device 2 establishes the axial reference of the workpiece, its internal tensioning mechanism achieves contact positioning with the hole wall. The hinged pressure arm of the rotary clamping device 3 can rotate around the fixed base 301, and the angle of the first pressure plate 203 is adjusted to match the main arm with different cross-sectional shapes. The slide 402 of the tail side pushing clamping device 4 moves along the guide rail, pushing the workpiece to fit tightly against the end positioning device. The hydraulic system controls the cylinders of the three devices to operate sequentially. The end device first completes internal tensioning, the rotary device then locks the hinge point, and the tail device finally performs lateral clamping. Each device feeds back clamping force data through pressure sensors to achieve dynamic balance adjustment of the clamping force. The machine tool worktable 1 is provided with multiple T-slots, and each device and component can be detachably installed in the T-slots.

[0035] Compared to existing technologies, traditional fixtures using a fixed first pressure plate 203 cannot adapt to changes in workpiece size. This solution achieves adaptive adjustment through a movable slide 402 and a rotating pressure arm. Existing technologies rely on manual alignment of the workpiece axis; this solution automatically corrects the workpiece position through the coordinated action of the end positioning device and the side pushing device. Traditional lead screw clamping methods have the risk of loosening; this solution uses a hydraulic locking mechanism to maintain a constant clamping force. For vibration issues in the variable amplitude hinge area, the rotating clamping device 3 forms a triangular support structure to effectively suppress machining vibration.

[0036] Through the above technical solutions, this application achieves automatic positioning and multi-point coordinated clamping of the workpiece on the main arm, eliminating positioning errors caused by manual operation. The hydraulic drive system ensures synchronous operation of each clamping device, shortening the clamping preparation time. The adaptive adjustment mechanism is compatible with workpieces of different specifications, reducing the number of tooling changes. The composite clamping method disperses contact stress, preventing clamping deformation of thin-walled structural parts. The multi-directional constraint mechanism effectively suppresses machining vibration and improves the positional accuracy of hole machining.

[0037] In some embodiments, for example Figures 3 to 6As shown, the end positioning and clamping device 2 includes a horizontal tensioning device 201, a rotary cylinder 202, a first pressure plate 203, and an end base 204. The horizontal tensioning device 201 is installed on the front part of the upper surface of the end base 204, the rotary cylinder 202 is vertically installed on the side part of the upper surface of the end base 204, and the first pressure plate 203 is horizontally fixedly installed on the free end of the rotating rod of the rotary cylinder 202. The horizontal tensioning device 201 includes: a tensioning cylinder 2011, a housing 2012, a guide post 2013, and a guide. Block 2014 and wedge 2015; the housing 2012 has a through hole running from front to back, the guide post 2013 and the wedge 2015 are placed side by side in the through hole, the tensioning cylinder 2011 is connected to the guide post 2013 through the piston rod in the through hole, the guide block 2014 is vertically arranged on the lower side wall of the housing 2012, the bottom surface of the wedge 2015 has a transverse guide groove that cooperates with the guide block 2014, the side of the guide post 2013 has an inclined surface that cooperates with the side wedge surface of the wedge 2015.

[0038] The horizontal tensioning device 201 is a hydraulically driven mechanism that achieves radial expansion of the workpiece. Specifically, it can be implemented by a tensioning cylinder 2011 driving a guide post 2013 and a wedge block 2015 in conjunction, used to eliminate workpiece clamping deformation and enhance positioning rigidity. The corner cylinder 202 is a hydraulic actuator with rotary motion function, specifically implemented by a structure where the piston rod end is connected to a rotary joint, used to drive the first pressure plate 203 to complete the vertical clamping action. The end base 204 is a supporting component that bears the horizontal tensioning device 201 and the corner cylinder 202, specifically implemented by a casting or welded part with a mounting plane, used to ensure the spatial positioning accuracy of the device. The guide post 2013 is a linear motion component that transmits the thrust of the tensioning cylinder 2011, specifically implemented by a cylindrical metal rod, whose inclined side surface converts linear motion into lateral displacement of the wedge block 2015. The guide block 2014 is a positioning component that restricts the movement direction of the wedge block 2015. Specifically, it can be a rectangular metal block welded and fixed to the housing 2012, forming a sliding pair with the wedge block 2015 through a transverse guide groove to prevent the wedge block 2015 from shifting. The wedge block 2015 is a transmission component that converts the linear motion of the guide post 2013 into lateral displacement. Specifically, it can be implemented using a trapezoidal metal block with an inclined surface, whose wedge surface contacts the inclined surface of the guide post 2013 to form a force transmission path.

[0039] Specifically, the horizontal tensioning device 201 drives the guide post 2013 to move axially through the extension and retraction of the piston rod of the tensioning cylinder 2011. The inclined surface of the side of the guide post 2013 engages with the wedge surface of the wedge block 2015, causing the wedge block 2015 to move laterally under the constraint of the guide block 2014, thereby radially expanding and clamping the inner wall of the main arm. The through hole of the housing 2012 provides movement space for the guide post 2013 and the wedge block 2015. The engagement of the guide block 2014 with the lateral guide groove restricts the wedge block 2015 to move only in a predetermined direction, avoiding uneven distribution of tensioning force due to deflection. The side-by-side placement of the guide post 2013 and the wedge block 2015 ensures that the force transmission path is distributed along the same axis. The thrust of the tensioning cylinder 2011 acts directly on the wedge block 2015 through the guide post 2013, reducing energy loss in the intermediate transmission links. The rotating rod of the corner cylinder 202 drives the first pressure plate 203 to rotate around the vertical axis, so that the first pressure plate 203 completes vertical clamping from above the main arm. The end base 204 integrates the horizontal tensioning device 201 and the corner cylinder 202 on the same reference plane. Through the front horizontal tensioning and the side vertical clamping, a spatial constraint is formed to realize multi-directional positioning of the end of the main arm.

[0040] Through the above technical solution, this application realizes automatic horizontal positioning and internal tensioning of the main arm end, eliminating manual alignment errors. Through the combined constraint of radial expansion clamping and vertical pressing, it effectively suppresses vibration during workpiece processing, while reducing clamping time and improving processing stability and efficiency.

[0041] In some embodiments, for example Figure 7 As shown, the rotary clamping device 3 includes a fixed base 301, a clamping arm 302, a rotary cylinder 303, and a second pressure plate 304. One end of the clamping arm 302 is horizontally and rotatably mounted on the upper end of the fixed base 301, the rotary cylinder 303 is mounted on the other end of the clamping arm 302, and the second pressure plate 304 is mounted on the free end of the piston rod of the rotary cylinder 303. The rotary clamping device 3 also includes a round nut 305, which is screwed onto the upper end of the fixed end of the clamping arm 302 to tighten and fix it when the clamping arm 302 is rotated into position. The rotary clamping device 3 also includes a handle 306, which includes a first handrail and a second handrail, which are symmetrically arranged on the left and right sides of the clamping arm 302.

[0042] The fixed base 301 is a base structure used to support the rotational movement of the clamping arm 302. It can be fixed to the machine tool worktable 1 by welding or bolting, serving to transfer loads. The clamping arm 302 is a rigid rod with a rotational fulcrum, which can be a cast steel part with a shaft hole. It forms a rotating pair with the fixed base 301 through a pin, enabling multi-angle position adjustment. The round nut 305 is a ring-shaped fastener with internal threads, which can be a standard part. It engages with the upper surface of the fixed end of the clamping arm 302 through thread engagement, forming a mechanical lock after rotation to the correct position. The handle 306 is a structure for manual operation, which can be a C-shaped steel handle welded to both sides of the clamping arm 302. The symmetrical arrangement allows the operator to apply force with both hands, avoiding structural tilting caused by unilateral force.

[0043] Specifically, when the clamping position needs to be adjusted, the operator holds the two handles and rotates the clamping arm 302, causing it to rotate around the fixed seat 301 to the target angle. When the piston rod of the rotating cylinder 303 extends, it drives the second pressure plate 304 to move downward, applying a vertical clamping force to the luffing hinge point of the main boom. After the clamping arm 302 is rotated into position, the round nut 305 is tightened so that its end face contacts the fixed seat 301, forming an axial constraint to prevent displacement caused by processing vibration. Because the clamping angle is adjustable, it can adapt to main boom structures with different cross-sectional dimensions, and the hydraulically driven second pressure plate 304 avoids the traditional manual tightening operation steps.

[0044] Through the above technical solutions, this application solves the problem of machining vibration caused by insufficient rigidity at the boom luffing hinge point, and improves clamping stability through multi-angle clamping and mechanical locking. The symmetrical handrail design reduces the labor intensity of the operator, and the rotary cylinder 303 driving the second pressure plate 304 reduces manual adjustment steps and improves clamping efficiency.

[0045] In some embodiments, for example Figure 8 As shown, the tail-end side-push clamping device 4 includes a tail-end base 401 and a slide 402. The tail-end side-push clamping device 4 also includes a horizontal tensioning device 201, a rotary cylinder 202, and a first pressure plate 203. The slide 402 is slidably mounted on the tail-end base 401. The horizontal tensioning device 201 is installed on the rear part of the upper surface of the slide 402, the rotary cylinder 202 is vertically installed on the side of the upper surface of the slide 402, and the first pressure plate 203 is horizontally fixedly installed on the free end of the rotating rod of the rotary cylinder 202. The tail-end side-push clamping device 4 also includes a backrest 403 and a hydraulic cylinder 404. The backrest 403 is fixedly installed on the machine tool worktable 1 and located on the rear side of the tail-end base 401. The hydraulic cylinder 404 is horizontally fixedly installed on the backrest 403, and the free end of the piston rod of the hydraulic cylinder 404 is fixedly installed on the rear side of the slide 402.

[0046] The tail base 401 is the basic component supporting the movement of the slide table 402. It can be implemented using a cast iron base with linear guide rails, providing axial movement guidance for the slide table 402. The slide table 402 is a support platform that can move along the machine tool axis. It can be implemented using a steel platform with a slider structure, whose sliding assembly structure allows adjustment of the clamping position according to the length of the main arm. The horizontal tensioning device 201 is a clamping mechanism with radial expansion function. It can be implemented using a hydraulically driven wedge block 2015 guide mechanism, achieving internal workpiece tensioning through inclined surface cooperation. The corner cylinder 202 is a rotatable hydraulic actuator used to drive the first pressure plate 203 to complete vertical clamping. The first pressure plate 203 is the clamping component that contacts the workpiece. It can be implemented using a steel plate structure with a rubber buffer layer to avoid damaging the workpiece surface. The backrest 403 is a fixed support structure. It can be implemented using a steel structure welded to the machine tool worktable 1, providing reaction support for the hydraulic cylinder 404.

[0047] Specifically, the slide table 402 forms an axial sliding pair with the tail base 401 via guide rails. The telescopic movement of the hydraulic cylinder 404 pushes the slide table 402 to move along the machine tool axis, realizing automatic adjustment of the tail position of the main arm. The horizontal tensioning device 201 is installed at the rear of the slide table 402. Under hydraulic drive, it pushes the wedge block 2015 to move laterally through the guide column 2013, so that the wedge block 2015 forms radial tension with the inner wall of the main arm. The corner cylinder 202 is vertically installed on the side of the slide table 402. Its rotating rod drives the first pressure plate 203 to complete the vertical clamping of the upper surface of the main arm. When the slide table 402 moves to the target position, the horizontal tensioning device 201 and the corner cylinder 202 work together to form a double clamping of axial positioning and radial constraint. The backrest 403 serves as the mounting base for the hydraulic cylinder 404. Through rigid connection, it ensures the stability of the thrust transmission when the slide table 402 moves and prevents the slide table 402 from shifting under pressure.

[0048] Through the above technical solution, this application achieves automatic adjustment of the tail position of the main arm and multi-point clamping, effectively suppressing radial deformation of the workpiece during processing. The axial movement of the slide table 402 and the synergistic effect of the horizontal tensioning device 201 can adapt to the clamping requirements of main arms of different lengths. The vertical first pressure plate 203 driven by the corner cylinder 202 forms a composite constraint with the internal tensioning mechanism, significantly reducing the impact of processing vibration on the surface quality of the workpiece. The hydraulically driven clamping system improves clamping efficiency while ensuring the uniformity and repeatability of the clamping force.

[0049] Other components and operations of the aerial work platform main boom 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.

[0050] 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.

[0051] 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 main arm machine processing clamp, characterized in that, include: The machine tool worktable and the end positioning clamping device, the rotary clamping device, and the tail side push clamping device installed on the machine tool worktable; The end positioning and clamping device, the rotary clamping device, and the tail side push clamping device are arranged sequentially at the front, middle, and rear of the machine tool worktable, and the three can automatically cooperate to clamp the main arm of the aerial work platform.

2. The aerial work platform main arm machine tooling fixture of claim 1, wherein, The end positioning and clamping device includes a horizontal tensioning device, a corner cylinder, a first pressure plate, and an end base; the horizontal tensioning device is installed on the front part of the upper surface of the end base, the corner cylinder is installed vertically on the side part of the upper surface of the end base, and the first pressure plate is horizontally fixedly installed on the free end of the rotating rod of the corner cylinder.

3. The aerial work platform main arm machine tooling fixture of claim 2, wherein, The horizontal tensioning device includes: a tensioning cylinder, a housing, a guide post, a guide block, and a wedge; the housing has a through hole running from front to back, the guide post and the wedge are placed side by side in the through hole, the tensioning cylinder is connected to the guide post in the through hole via a piston rod, a guide block is vertically arranged on the lower side wall of the housing, a transverse guide groove that mates with the guide block is opened on the lower bottom surface of the wedge, and an inclined surface is provided on the side of the guide post, which mates with the wedge surface on the side of the wedge.

4. The machining fixture for the main boom of an aerial work platform according to claim 1, characterized in that, The rotary clamping device includes a fixed base, a clamping arm, a rotary cylinder, and a second pressure plate; one end of the clamping arm is horizontally rotatably mounted on the upper end of the fixed base, the rotary cylinder is mounted on the other end of the clamping arm, and the second pressure plate is mounted on the free end of the piston rod of the rotary cylinder.

5. The aerial work platform main arm machine tooling fixture of claim 4, wherein, The rotary clamping device also includes a round nut, which is screwed onto the upper end of the fixed end of the clamping arm to tighten and fix it when the clamping arm is rotated into position.

6. The aerial work platform main arm machine tooling fixture of claim 4, wherein, The rotary clamping device also includes a handle, which includes a first handrail and a second handrail, and the first handrail and the second handrail are symmetrically arranged on the left and right sides of the clamping arm.

7. The aerial work platform main arm machine tooling fixture of claim 2, wherein, The tail-end side-push clamping device includes a tail-end base and a slide table. It also includes a horizontal tensioning device, a corner cylinder, and a first pressure plate. The slide table is slidably mounted on the tail-end base. The horizontal tensioning device is installed on the rear part of the upper surface of the slide table, the corner cylinder is vertically installed on the side of the upper surface of the slide table, and the first pressure plate is horizontally fixedly installed on the free end of the rotating rod of the corner cylinder.

8. The aerial work platform main arm machine tooling fixture of claim 7, wherein, The tail-end side-push clamping device also includes a backing and a hydraulic cylinder; the backing is fixedly installed on the machine tool worktable and located on the rear side of the tail base, the hydraulic cylinder is horizontally fixedly installed on the backing, and the free end of the piston rod of the hydraulic cylinder is fixedly installed on the rear side of the slide.

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