Positioning and clamping device for cantilever crane

Abstract

The utility model discloses a positioning and clamping device for a cantilever crane, which comprises at least two groups of platform components and a plurality of groups of positioning pin assemblies, and the plurality of groups of positioning pin assemblies are used for being arranged on a machine tool workbench so as to position the platform components relative to the machine tool workbench. Each platform assembly comprises a mounting platform and an adjusting and pressing assembly connected to the mounting platform in an adjustable mode, and one platform assembly is used for conducting positioning, pressing and fixing on the arm frame after scribing relative to the mounting platform through the adjusting and pressing assembly on the platform assembly outside the machine tool. And the platform assembly is used for integrally positioning and installing the arm support which is positioned, pressed and fixed on the platform assembly on the machine tool working table, so that the arm support is indirectly positioned with the machine tool working table through the mounting platform. According to the device, metering, alignment and trial cutting on the machine tool can be effectively avoided, then the downtime of the machine tool is shortened, the utilization rate and the machining efficiency of the machine tool are improved, meanwhile, the requirement for the state of the welded cantilever crane after scribing and clamping of the cantilever crane on the outer platform assembly of the machine tool is not high, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing technical field, in particular, relate to a positioning clamping device for arm support. BACKGROUND

[0002] Arm support class spare parts, processing position includes pin hole, ear plate inside and outside end face, end plate etc., processing position is more, and has a lot of space size, during processing involves clamping, tool setting, trial cutting, after adjustment repeats the step described before, until meeting the requirement, at present, the traditional processing alignment mode is to place the equal height block on the machine tool workbench, then hoist the spare part to the equal height block, check the arm support side, hole position, end face etc.

[0003] Such as existing patent 1: CN218905311U arm support machining positioning tool, the patent includes base, first attitude adjustment mechanism, second attitude adjustment mechanism etc., can automatically position the arm support attitude with the oil cylinder, can adapt to various arm supports.

[0004] Such as existing patent 2: CN109434501B excavator arm machining tool, the patent discloses an excavator arm machining tool, including tool platform, support seat, rear support positioning device, pressing device, clamping device etc., can realize the positioning, pressing etc.

[0005] Such as existing patent 3: CN214558650U is positioned for arm support tool, the patent discloses an arm support positioning tool, including positioning platform and positioning device etc., but the novel tool requires the state after the welding of arm support to be high, does not allow too big error or welding deformation, and the tool cannot detect the arm support. UTILITY MODEL CONTENTS

[0006] The utility model provides a positioning clamping device for arm support to solve the technical problem that the prior art device will consume a large amount of time to clamp alignment, tool setting and trial cutting in the early stage of arm support machining, reduces the utilization rate of machine tool, and requires the state after the welding of arm support to be high, does not allow too big error or welding deformation.

[0007] The technical scheme adopted by the utility model is as follows:

[0008] The positioning and clamping device for the boom includes at least two sets of platform assemblies and multiple sets of positioning pin assemblies, the multiple sets of positioning pin assemblies are arranged on the machine tool workbench and connected with one set of platform assemblies to position the platform assembly relative to the machine tool workbench; each set of platform assembly includes a mounting platform and an adjustable pressing assembly connected to the mounting platform, one set of platform assembly is used to position and press the marked boom relative to the mounting platform through the adjustable pressing assembly outside the machine tool; one set of platform assembly is used to position and press the boom as a whole on the machine tool workbench, so that the boom is indirectly positioned relative to the machine tool workbench through the mounting platform.

[0009] Further, the mounting platform includes a platform body and multiple sets of pin hole mounting seats fixedly connected with the platform body; the adjustable pressing assembly is arranged on the platform body to position and press different booms relative to the platform body; the multiple sets of pin hole mounting seats are connected with the multiple sets of positioning pin assemblies one by one to position the mounting platform relative to the machine tool workbench.

[0010] Further, the pin hole mounting seat includes a mounting plate fixed with the platform body, a mounting support fixed on the mounting plate and a sleeve detachably arranged on the mounting support; the positioning pin assembly includes a positioning plate fixed with the machine tool workbench and a positioning pin detachably fixed on the positioning plate, the positioning pin is arranged in the corresponding sleeve to position the mounting platform relative to the machine tool workbench.

[0011] Further, the adjustable pressing assembly includes an adjusting assembly, multiple sets of first adjusting seats and multiple sets of pressing assemblies, the platform body is provided with a plurality of threaded mounting holes and pin holes for adjustably mounting the adjusting assembly, the first adjusting seat and the pressing assembly; the adjusting assembly is arranged at the end of the platform body in the length direction to adjustably abut against the end of the boom to position the boom along the length direction of the mounting platform; the multiple sets of first adjusting seats are arranged on both sides of the platform body in the width direction to adjustably abut against both sides of the width of the boom; the multiple sets of pressing assemblies are arranged on both sides of the platform body in the width direction to press and fix the positioned boom on the platform body.

[0012] Further, the adjusting assembly includes a connecting base fixed with the platform body and a second adjusting seat adjustably arranged on the connecting base; the second adjusting seat is used to adjustably abut against the end of the boom to position the position of the boom in the length direction of the platform body.

[0013] Further, a plurality of T-shaped grooves are arranged on the upper surface of the connecting base; the second adjusting seat comprises an adjusting support, a plurality of groups of bolts and T-shaped nuts for connecting and fixing, a top rod threaded through the adjusting support, and a top plate movably connected to the end of the top rod; the bottom end of the adjusting support is provided with an outward protruding stopper which is slidingly fitted in the connecting groove; the plurality of T-shaped nuts are arranged in the T-shaped grooves, and the upper end of the bolt is threaded through the bottom plate of the adjusting support, and the lower end of the bolt is threaded through the T-shaped nut to fix the adjusting support on the connecting base; the top plate is used for abutting against the outer wall surface of the arm support.

[0014] Further, the end of the top rod is in a ball shape; and the recess for accommodating the end of the top rod on the top plate is a spherical cavity.

[0015] Further, the pressing assembly comprises a mounting base and a pressing seat adjustably fixed on the mounting base; the mounting base is used for detachable fixing with the platform body; and the pressing seat is used for pressing the arm support to fix the arm support on the platform body.

[0016] Further, a plurality of T-shaped grooves are arranged on the upper surface of the connecting base; the second adjusting seat comprises an adjusting support, a plurality of groups of bolts and T-shaped nuts for connecting and fixing, a top rod threaded through the adjusting support, and a top plate movably connected to the end of the top rod; the bottom end of the adjusting support is provided with an outward protruding stopper which is slidingly fitted in the connecting groove; the plurality of T-shaped nuts are arranged in the T-shaped grooves, and the upper end of the bolt is threaded through the bottom plate of the adjusting support, and the lower end of the bolt is threaded through the T-shaped nut to fix the adjusting support on the connecting base; the top plate is used for abutting against the outer wall surface of the arm support.

[0017] Further, the arm support positioning and clamping device further comprises a reference seat fixed with the platform body, and the reference seat is provided with a vertical reference surface for providing a reference for the marking of the arm support and positioning the arm support relative to the platform body.

[0018] The utility model has the following beneficial effects:

[0019] The arm support positioning and clamping device of the utility model, at least two groups of platform assemblies are used alternately, one group of platform assemblies is used for aligning, positioning, clamping and fixing the arm support after scribing outside the machine tool, and the other group of platform assemblies is used for processing the arm support simultaneously, thereby effectively avoiding the process of dialing, aligning and trial cutting on the machine tool, thereby greatly reducing the machine tool downtime, improving the machine tool utilization rate and processing efficiency, and because the scribing and alignment of the arm support are completed outside the machine tool by one group of platform assemblies, the device can also effectively and safely complete scribing, machine loading and rapid alignment during the processing and manufacturing of arm support parts, can effectively improve the machine tool clamping efficiency and reduce the number of tool changes, thereby improving the machine tool utilization rate; meanwhile, the device can use manual scribing to determine the arm support posture, has low requirements for the state of the arm support after welding, and can accurately detect the welding deformation state and the machining allowance in advance; in addition, the adjustable pressing assembly is adjustably connected to the mounting platform to adapt to the rapid fixing of various arm supports after scribing, thereby improving the application range of the device.

[0020] In addition to the objects, features and advantages described above, the utility model has other objects, features and advantages. The utility model will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings that form a part of this application are intended to provide further understanding of the utility model, and the schematic embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0022] Figure 1 It is the arm support positioning and clamping device of the preferred embodiment of the utility model and the machine tool workbench assembly state schematic diagram;

[0023] Figure 2 It is Figure 1 The space structure schematic diagram of the platform assembly in it;

[0024] Figure 3 It is Figure 2 The space structure schematic diagram of the adjusting assembly in it;

[0025] Figure 4 It is Figure 3 The space structure schematic diagram of the second adjusting seat in it;

[0026] Figure 5 It is Figure 2 The space structure schematic diagram of the pressing assembly in it;

[0027] Figure 6 It is Figure 2 The space structure schematic diagram of the pin hole mounting seat in it;

[0028] Figure 7 It isFigure 2 The spatial structure schematic diagram of the base reference seat;

[0029] Figure 8 is Figure 1 The spatial structure schematic diagram of the positioning pin assembly.

[0030] Legend:

[0031] 1, positioning pin assembly; 11, positioning plate; 12, positioning pin;

[0032] 2, machine tool workbench;

[0033] 3, mounting platform; 31, platform body; 32, pin hole mounting seat; 321, mounting plate; 322, mounting support; 323, sleeve; 4, adjusting assembly component; 41, connecting base; 42, second adjusting seat; 421, adjusting support; 422, top rod; 423, top plate;

[0034] 5, first adjusting seat;

[0035] 6, pressing assembly; 61, mounting base; 62, pressing seat; 621, pressing seat body; 622, locking nut; 623, supporting nut; 624, pressing plate; 625, mounting screw rod;

[0036] 7, reference seat; 701, reference surface;

[0037] 8, arm support. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered below.

[0039] Referring to Figures 1-2 , the preferred embodiment of the present application provides a positioning clamping device for arm support, comprising: at least two groups of platform components and a plurality of positioning pin assemblies 1, the plurality of positioning pin assemblies 1 are used to be installed on the machine tool workbench 2, and are used to be connected with a group of platform components, so as to position the platform component relative to the machine tool workbench 2. Each group of platform components comprises a mounting platform 3 and an adjustable pressing assembly connected to the mounting platform 3, and a group of platform components is used to position and press and fix the arm support after scribing on the mounting platform 3 through the adjustable pressing assembly. A group of platform components is used to position and install the arm support positioned and fixed thereon on the machine tool workbench 2, so that the arm support is indirectly positioned with the machine tool workbench 2 through the mounting platform 3.

[0040] The arm support positioning and clamping device, at least two groups of platform assemblies are used alternately, one group of platform assemblies is used for aligning, positioning, clamping and fixing the arm support 8 after marking outside the machine tool, and the other group of platform assemblies is used for processing the arm support 8, so that the process of dialing, aligning and trial cutting on the machine tool is avoided, the machine tool downtime is greatly reduced, the machine tool utilization and processing efficiency are improved, the marking and alignment of the arm support 8 are completed outside the machine tool by the one group of platform assemblies, the device can also effectively and safely complete the marking, machine loading and rapid alignment in the process of arm support part machining and manufacturing, the machine tool clamping efficiency is effectively improved, the tool changing frequency is reduced, the machine tool utilization is improved, the arm support posture can be determined by manual marking, the requirement for the state of the arm support after welding is not high, the welding deformation state and the machining allowance are accurately detected in advance, in addition, the adjusting and pressing assembly is adjustably connected to the mounting platform 3, so that the rapid fixing of different arm supports 8 after marking is achieved, and the application range of the device is improved.

[0041] The arm support positioning and clamping device, at least two groups of platform assemblies are used alternately, one group of platform assemblies is used for aligning, positioning, clamping and fixing the arm support 8 after marking outside the machine tool, and the other group of platform assemblies is used for processing the arm support 8, so that the process of dialing, aligning and trial cutting on the machine tool is avoided, the machine tool downtime is greatly reduced, the machine tool utilization and processing efficiency are improved, the marking and alignment of the arm support 8 are completed outside the machine tool by the one group of platform assemblies, the device can also effectively and safely complete the marking, machine loading and rapid alignment in the process of arm support part machining and manufacturing, the machine tool clamping efficiency is effectively improved, the tool changing frequency is reduced, the machine tool utilization is improved, the arm support posture can be determined by manual marking, the requirement for the state of the arm support after welding is not high, the welding deformation state and the machining allowance are accurately detected in advance, in addition, the adjusting and pressing assembly is adjustably connected to the mounting platform 3, so that the rapid fixing of different arm supports 8 after marking is achieved, and the application range of the device is improved.

[0042] Optionally, as shown in Figure 2 The mounting platform 3 comprises a platform body 31 and a plurality of pin hole mounting seats 32 fixedly connected with the platform body 31. The adjusting and pressing assembly is adjustably arranged on the platform body 31 to press and fix different arm supports relative to the platform body 31. The plurality of pin hole mounting seats 32 are connected with the plurality of positioning pin assemblies 1 one by one to position the mounting platform 3 relative to the machine tool workbench 2.

[0043] In this optional scheme, as shown in Figure 6 and Figure 8As shown, the pin hole mounting seat 32 includes a mounting plate 321 fixed with the platform body 31, a mounting support 322 fixed on the mounting plate 321, and a sleeve 323 detachably mounted on the mounting support 322. The positioning pin assembly 1 includes a positioning plate 11 fixed with the machine tool workbench 2, and a positioning pin 12 detachably fixed on the positioning plate 11, which is used to be inserted into the corresponding sleeve 323 to position the mounting platform 3 relative to the machine tool workbench 2. In actual design, the number of pin hole mounting seats 32 is two groups, which are arranged at both ends of the length direction of the platform body 31, and the hole center distance of the sleeves 323 at both ends is ensured by machining, and the center line of the hole center of the sleeves 323 at both ends coincides with the center line of the platform body 31; at the same time, the number of positioning pin assemblies 1 is also two groups, which are arranged at both ends of the length direction of the machine tool workbench 2, and the installation position is accurately determined by a table, which is used to position the mounting platform 3 after the platform assembly is hoisted on the machine tool workbench 2, so as to ensure the position of the mounting platform 3 relative to the machine tool workbench 2. In this optional scheme, the sleeves 323 and the positioning pins 12 can be easily disassembled and replaced after being damaged, so as to reduce the cost of the device.

[0044] Optionally, as shown in Figure 2 The adjusting and pressing assembly includes an adjusting assembly 4, a plurality of first adjusting seats 5, and a plurality of pressing assemblies 6. The platform body 31 is machined with a plurality of threaded mounting holes and pin holes for adjustably mounting the adjusting assembly 4, the first adjusting seats 5, and the pressing assemblies 6. In design, the position of the threaded mounting holes and pin holes relative to the center line of the mounting platform 3 is ensured by machining, so as to facilitate the pressing assemblies 6 to press the arm support 8 at different positions, and facilitate the first adjusting seats 5 to tighten the arm support 8 at different positions. The adjusting assembly 4 is arranged at the end of the length direction of the platform body 31, and is used to adjustably abut against the end of the arm support, so as to position the arm support along the length direction of the mounting platform 3. The plurality of first adjusting seats 5 are arranged on both sides of the width direction of the platform body 31, and are used to adjustably abut against both sides of the width of the arm support. The plurality of pressing assemblies 6 are arranged on both sides of the width direction of the platform body 31, and are used to press and fix the positioned arm support on the platform body 31. In actual design, the plurality of pressing assemblies 6 and the plurality of first adjusting seats 5 are respectively distributed in the width direction of the mounting platform 3 and are symmetric about the center line of the mounting platform 3.

[0045] Optionally, as shown in Figure 3 The adjusting assembly 4 includes a connecting base 41 fixed with the platform body 31, and a second adjusting seat 42 adjustably arranged on the connecting base 41. The second adjusting seat 42 is used to adjustably abut against the end of the arm support, so as to position the arm support in the length direction of the platform body 31.

[0046] In this optional scheme, as shown in Figure 3As shown, the upper surface of the connecting base 41 is machined with a plurality of T-shaped grooves and connecting grooves arranged in concave. The second adjusting seat 42 comprises an adjusting support 421, a plurality of groups of bolts and T-shaped nuts for connecting and fixing, a top rod 422 threaded and connected in the adjusting support 421, and a top plate 423 movably connected with the end of the top rod 422. The bottom end of the adjusting support 421 is provided with an outward protruding stopper which is slidingly fitted in the connecting groove. A plurality of T-shaped nuts are separately arranged in the T-shaped grooves, and the upper end of the bolt is threaded through the bottom plate of the adjusting support 421, and the lower end of the bolt is threaded with the T-shaped nut to fix the adjusting support 421 on the connecting base 41. The top plate 423 is used to abut against the outer wall surface of the arm support.

[0047] Preferably, as shown in Figure 4 the end of the top rod 422 is a ball head, and the recess on the top plate 423 for accommodating the end of the top rod 422 is a spherical cavity, so that through the cooperation of the ball head and the spherical cavity, the surface shape of the arm support 8 is adapted, the top plate 423 always abuts against the outer wall surface of the arm support 8, the tightening effect of the arm support 8 is improved, and the top rod 422 can be driven to rotate forward and backward by the handle connected to the other end of the top rod 422.

[0048] Optionally, as shown in Figure 2 the structure of the first adjusting seat 5 is similar to that of the second adjusting seat 42, except that the bottom end of the adjusting support of the first adjusting seat 5 is not provided with an outward protruding stopper.

[0049] Optionally, as shown in Figure 5 the pressing assembly 6 comprises a mounting base 61 and a pressing seat 62 adjustably fixed on the mounting base 61. The mounting base 61 is used for detachable fixing with the platform body 31. The pressing seat 62 is used for pressing the arm support downward to fix the arm support on the platform body 31.

[0050] In this alternative, as shown in Figure 2 and Figure 5As shown, the upper surface of the mounting base 61 is machined with a plurality of recessed T-shaped grooves. The pressing seat 62 comprises a pressing seat body 621, a plurality of sets of bolts and T-shaped nuts, a plurality of locking nuts 622 and support nuts 623, and a pressing plate 624. The pressing seat body 621 is supported on the mounting base 61, a plurality of T-shaped nuts are arranged in the T-shaped grooves, and the upper ends of the bolts pass through the bottom plate of the pressing seat body 621, and the lower ends of the bolts pass through the T-shaped nuts to fix the pressing seat body 621 on the mounting base 61. At the same time, through the arrangement of the T-shaped grooves, the position of the pressing seat 62 is adjusted to adapt to different arm widths and is locked by the bolts and T-shaped nuts. The upper end of the pressing seat body 621 has a plurality of vertically arranged mounting screws 625, the pressing block passes through the mounting screws 625, and the locking nuts 622 located below the pressing plate 624 are threadedly connected to the mounting screws 625 close to the arm side, and the support nuts 623 located below the pressing plate 624 are threadedly connected to the mounting screws 625 away from the arm side to support the pressing plate 624.

[0051] Preferably, as shown in Figure 2 and Figure 7 As shown, the adjusting assembly 4 further comprises a reference seat 7 fixedly positioned with the platform body 31, and the reference seat 7 is provided with a vertical reference surface 701 for providing a reference for the line marking of the arm. When designed, the distance between the pin hole on the reference seat 7 and the reference surface 701 is guaranteed by machining, and after the reference seat 7 is installed on the mounting platform 3, the size of the reference surface 701 relative to the center line of the mounting platform 3 is determined.

[0052] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A positioning and clamping device for an arm support, characterized in that The positioning and clamping device for arm frame comprises at least two sets of platform assemblies and a plurality of sets of positioning pin assemblies (1), the plurality of sets of positioning pin assemblies (1) are arranged on a machine tool workbench (2) and are used for being connected with a set of platform assemblies so as to position the platform assembly relative to the machine tool workbench (2). Each set of platform assembly comprises a mounting platform (3) and an adjustable pressing assembly connected to the mounting platform (3), and a set of platform assembly is used for positioning and pressing and fixing the arm frame relative to the mounting platform (3) through the adjustable pressing assembly on the arm frame outside the machine tool. A set of platform assembly is used for positioning and pressing and fixing the arm frame on the machine tool workbench (2) as a whole, so that the arm frame is indirectly positioned with the machine tool workbench (2) through the mounting platform (3).

2. The positioning and clamping device for arm frame according to claim 1, wherein the mounting platform (3) comprises a platform body (31) and a plurality of sets of pin hole mounting seats (32) fixedly connected to the platform body (31); the adjustable pressing assembly is adjustably arranged on the platform body (31) to position and press and fix different arm frames relative to the platform body (31); and the plurality of sets of pin hole mounting seats (32) are correspondingly connected with the plurality of sets of positioning pin assemblies (1) to position the mounting platform (3) relative to the machine tool workbench (2).

3. The positioning and clamping device for arm frame according to claim 2, wherein the pin hole mounting seat (32) comprises a mounting plate (321) fixed to the platform body (31), a mounting support (322) fixed to the mounting plate (321), and a sleeve (323) detachably arranged on the mounting support (322); and the positioning pin assembly (1) comprises a positioning plate (11) fixed to the machine tool workbench (2) and a positioning pin (12) detachably fixed to the positioning plate (11), the positioning pin (12) being used for being arranged in the corresponding sleeve (323) to position the mounting platform (3) relative to the machine tool workbench (2).

4. The positioning and clamping device for arm frame according to claim 2, wherein the adjustable pressing assembly comprises an adjusting assembly (4), a plurality of first adjusting seats (5) and a plurality of pressing assemblies (6), a plurality of threaded mounting holes and pin holes are formed on the platform body (31) to adjustably mount the adjusting assembly (4), the first adjusting seats (5) and the pressing assemblies (6); the adjusting assembly (4) is arranged at the end of the platform body (31) in the length direction to adjustably abut against the end of the arm frame and position the arm frame along the length direction of the mounting platform (3); the plurality of first adjusting seats (5) are arranged on both sides of the platform body (31) in the width direction to adjustably abut against both sides of the width of the arm frame; and the plurality of pressing assemblies (6) are arranged on both sides of the platform body (31) in the width direction to press and fix the positioned arm frame on the platform body (31).

5. The positioning and clamping device for arm frame according to claim 4, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The adjustable assembly (4) comprises a connecting base (41) fixed to the platform body (31), and a second adjusting seat (42) adjustably arranged on the connecting base (41); The second adjusting seat (42) is used for adjustably abutting against the end of the arm support to position the arm support in the length direction of the platform body (31).

6. The positioning and clamping device for the arm support according to claim 5, wherein, A plurality of T-shaped grooves and connecting grooves are arranged on the upper surface of the connecting base (41); The second adjusting seat (42) comprises an adjusting support (421), a plurality of groups of bolts and T-shaped nuts for connecting and fixing, a jacking rod (422) threadedly arranged in the adjusting support (421), and a top plate (423) movably connected to the end of the jacking rod (422); The bottom end of the adjusting support (421) is provided with an outward protruding stop opening which is slidingly arranged in the connecting groove; A plurality of T-shaped nuts are arranged in the T-shaped grooves, the upper ends of the bolts are arranged through the bottom plate of the adjusting support (421), and the lower ends of the bolts are arranged through the T-shaped nuts to fix the adjusting support (421) to the connecting base (41); The top plate (423) is used for abutting against the outer wall surface of the arm support.

7. The positioning and clamping device for the arm support according to claim 6, wherein, The end of the jacking rod (422) is in the shape of a ball head; The cavity for accommodating the end of the jacking rod (422) on the top plate (423) is in the shape of a spherical cavity.

8. The positioning and clamping device for the arm support according to claim 4, wherein, The pressing assembly (6) comprises a mounting base (61) and a pressing seat (62) adjustably fixed to the mounting base (61); The mounting base (61) is used for detachable fixing to the platform body (31); The pressing seat (62) is used for pressing the arm support downward to fix the arm support to the platform body (31).

9. The positioning and clamping device for the arm support according to claim 8, wherein, A plurality of T-shaped grooves are arranged on the upper surface of the mounting base (61); The pressing seat (62) comprises a pressing seat body (621), a plurality of groups of bolts and T-shaped nuts, a plurality of locking nuts (622) and supporting nuts (623), and a pressing plate (624); The pressing seat body (621) is supported on the mounting base (61), a plurality of T-shaped nuts are arranged in the T-shaped grooves, the upper ends of the bolts are arranged through the bottom plate of the pressing seat body (621), and the lower ends of the bolts are arranged through the T-shaped nuts to fix the pressing seat body (621) to the mounting base (61); The upper end of the pressing seat body (621) is provided with a plurality of vertically arranged mounting screws (625), the pressing block is arranged through the openings of the plurality of mounting screws (625), the locking nut (622) below the pressing plate (624) is threadedly connected to the mounting screw (625) close to the arm support, and the supporting nut (623) above the pressing plate (624) is threadedly connected to the mounting screw (625) away from the arm support.

10. The positioning and clamping device for the arm support according to claim 4, wherein, The positioning and clamping device for the arm support further comprises a reference seat (7) fixedly positioned with the platform body (31), and the reference seat (7) is provided with a vertical reference surface (701), which is used for providing a reference for the line marking of the arm support and positioning the arm support relative to the platform body (31).

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