Fixing platform for beam frame welding

Abstract

The utility model relates to the technical field of workpiece clamping tools, in particular to a fixing platform for welding a cross beam frame, which comprises a fixing frame, and two groups of longitudinal clamping components, two groups of middle clamping components and two groups of end part clamping components which are arranged on the fixing frame, the two longitudinal clamping assemblies are symmetrically distributed and arranged and used for clamping the two longitudinal connecting pieces correspondingly. The two middle clamping assemblies clamp the two transverse connecting pipes in the front-back direction. The two end clamping assemblies are used for clamping the two ends of the transverse connecting pipe correspondingly. The end clamping assembly comprises an inner supporting piece, a fixed plug pin and a movable plug pin. The inner supporting piece is provided with two supporting sleeves, the opening directions of the two supporting sleeves are opposite, the two supporting sleeves of the inner supporting piece extend into an inner cavity of the transverse connecting pipe, one end of the fixed plug pin penetrates through the side wall of the transverse connecting pipe and abuts against one supporting sleeve, and one end of the movable plug pin penetrates through the other side wall of the transverse connecting pipe and abuts against the other supporting sleeve.

Description

TECHNICAL FIELD

[0001] The utility model relates to workpiece clamping frock technical field especially relates to a fixed platform for crossbeam frame welding. BACKGROUND

[0002] The two ends of two transverse connecting pipes need to be welded with two longitudinal connecting pieces during the production of the automobile crossbeam frame, and the transverse connecting pipe and the longitudinal connecting piece need to be clamped and fixed respectively during the welding work so as to facilitate the welding work. The crossbeam frame itself is a shell structure with a cavity inside, and some parts of the transverse connecting pipe are provided with openings for connecting other parts. Since the existing crossbeam frame generally has an external opening, the existing method usually adopts a mode of directly clamping the outer wall of the crossbeam frame by two external clamping arms. This clamping and fixing mode only applies external force to the crossbeam frame, which can easily cause local deformation of the crossbeam frame. SUMMARY

[0003] Therefore, the utility model provides a fixed platform for crossbeam frame welding to solve one of the problems in the prior art.

[0004] To achieve one or part or all of the above purposes or other purposes, the utility model provides:

[0005] A fixed platform for crossbeam frame welding is used for clamping two transverse connecting pipes and clamping longitudinal connecting pieces distributed at the two ends of the two transverse connecting pipes. The fixed platform for crossbeam frame welding comprises a fixing frame, longitudinal clamping assemblies mounted on the fixing frame, a middle clamping assembly and an end clamping assembly.

[0006] The longitudinal clamping assemblies are provided in two groups, and the two groups of longitudinal clamping assemblies are symmetrically arranged. The two groups of longitudinal clamping assemblies are respectively used for clamping two longitudinal connecting pieces.

[0007] The middle clamping assembly is provided in two groups, and the two groups of middle clamping assemblies clamp the two transverse connecting pipes from the front and rear directions.

[0008] The end clamping assembly is provided in two groups, and the two groups of end clamping assemblies are respectively used for clamping the two ends of the transverse connecting pipe. The end clamping assembly comprises an inner support, a fixed pin and a movable pin.

[0009] The inner support is provided with two support sleeves, the openings of the two support sleeves face opposite directions, the two support sleeves of the inner support extend into the inner cavities of the transverse connecting pipes, one end of the fixed pin penetrates the side wall of the transverse connecting pipe and abuts against one of the support sleeves, and one end of the movable pin penetrates the other side wall of the transverse connecting pipe and abuts against the other support sleeve.

[0010] Further, the inner support comprises a first air cylinder and a scissor structure.

[0011] The first cylinder is mounted on a fixed frame, and the first cylinder is provided with an extension rod and support plates distributed on both sides of the extension rod;

[0012] The scissor structure has two scissor arms hingedly connected to each other, the hinge of the two scissor arms is provided with a hinge rod connected with the two support plates, the bottom ends of the two scissor arms are connected with the extension rod, and the top ends of the two scissor arms correspondingly fix two support sleeves, and the support sleeves can be moved up and down by the first cylinder.

[0013] Further, the end of the movable bolt and the end of the fixed bolt are provided with an outer limiting wall for contacting the side wall of the transverse connecting pipe and a connecting boss arranged on the outer limiting wall, the connecting boss passes through the side wall of the transverse connecting pipe and abuts against the support sleeve, and the end of the support sleeve is provided with an inner limiting wall for contacting the inner wall of the transverse connecting pipe.

[0014] Further, the end clamping assembly comprises a second cylinder for driving the movable bolt to move, the tail of the second cylinder is provided with a pressing handle, the movable bolt is driven to move by the second cylinder by operating the pressing handle, and the end clamping assembly further comprises a fixed plate for being fixed on the fixed bolt.

[0015] Further, the side wall of the support sleeve is provided with a lateral notch.

[0016] Further, the middle clamping assembly comprises a bottom lifting frame, a side limiting rod and a top pressing frame, the bottom lifting frame, the side limiting rod and the top pressing frame enclose a middle clamping space, and the middle part of the transverse connecting pipe is clamped and fixed through the middle clamping space.

[0017] Further, the side limiting rod is an upwardly outwardly curved rod-shaped structure, the top pressing frame comprises a pressing rod and a top supporting frame, the middle part of the pressing rod is hingedly connected to the top supporting frame, and the two ends of the pressing rod are provided with pressing blocks for contacting the outer wall of the transverse connecting pipe.

[0018] Further, the longitudinal clamping assembly comprises a bottom supporting plate and two groups of end positioning pieces, the bottom supporting plate is used for supporting the longitudinal connecting piece, the two groups of end positioning pieces are arranged at the two ends of the longitudinal connecting piece respectively, and the end positioning pieces are used for clamping the upper and lower outer walls of the longitudinal connecting piece.

[0019] Further, the end positioning piece comprises a bottom positioning pin and a top positioning pin, and the fixed frame is provided with a supporting table for fixing the bottom positioning pin and the top positioning pin, wherein the bottom positioning pin passes through the bottom wall of the longitudinal connecting piece from the bottom, the top positioning pin passes through the top wall of the longitudinal connecting piece from the top, and the bottom positioning pin and the top positioning pin are coaxially arranged.

[0020] Further, the end positioning member further comprises a connecting fork arm, one end of the connecting fork arm is hinged with the support table, and the other end of the connecting fork arm is used for being mounted on the top positioning pin.

[0021] By implementing the embodiments of the utility model, the following beneficial effects are achieved:

[0022] After the above scheme is adopted, when the beam frame needs to be welded, the following process can be adopted to place the beam frame on the fixed platform, two transverse connecting pipes are clamped and positioned by two middle clamping assemblies respectively, and it is ensured that the mounting holes of the transverse connecting pipes are sleeved on the fixed pins, then the two supporting sleeves of the inner supporting member are inserted into the transverse connecting pipe through the bottom opening of the transverse connecting pipe, and one of the supporting sleeves abuts against the fixed pin, then the movable pin is inserted into the transverse connecting pipe from the mounting hole on the other side of the transverse connecting pipe and abuts against the other supporting sleeve, so that the supporting sleeves and the fixed pins and the supporting sleeves and the movable pins clamp one side wall of the transverse connecting pipe respectively, thereby avoiding the local deformation of the beam frame and improving the yield rate after welding. Finally, the two longitudinal connecting members are placed on the longitudinal clamping assemblies, so that the side wall of the longitudinal connecting member abuts against the end of the transverse connecting pipe, so as to facilitate subsequent welding. In general, the fixed platform adopts the inner supporting member which can be inserted into and extended out of the transverse connecting pipe, realizes the clamping form that the supporting sleeves and the fixed pins and the supporting sleeves and the movable pins clamp one side wall of the transverse connecting pipe respectively, solves the problem that the traditional clamping tool only adopts external clamping and causes local deformation of the beam frame, and effectively improves the yield rate of the beam frame after welding. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 It is a whole structure schematic view of the object workpiece beam frame of the embodiment;

[0025] Figure 2 It is a whole structure view of the fixed platform clamping the beam frame of the embodiment;

[0026] Figure 3 It is a top view of the fixed platform clamping the beam frame of the embodiment;

[0027] Figure 4 It is a whole structure view of the fixed platform of the embodiment;

[0028] Figure 5 It is a top view of the fixed platform of the embodiment;

[0029] Figure 6 Fig. 2 is a structural schematic view of an end clamping assembly of the present embodiment;

[0030] Figure 7 Fig. 3 is an enlarged view of part C in Fig. 2; Figure 6

[0031] Figure 8 Fig. 4 is a structural schematic view of a middle clamping assembly of the present embodiment;

[0032] Figure 9 Fig. 5 is a structural schematic view of a longitudinal clamping assembly of the present embodiment.

[0033] Reference signs:

[0034] 1, fixed frame; 10, support table;

[0035] 2, longitudinal clamping assembly; 20, bottom supporting plate; 21, bottom positioning pin; 22, top positioning pin; 23, connecting fork arm;

[0036] 3, middle clamping assembly; 30, bottom lifting frame; 300, front end lifting structure; 301, rear end lifting structure; 31, side limiting rod; 32, top pressing frame; 320, top supporting frame; 321, pressing rod; 321a, pressing block;

[0037] 4, end clamping assembly; 40, inner supporting piece; 400, supporting sleeve; 400a, inner limiting wall; 400b, lateral notch; 401, first air cylinder; 401a, telescopic rod; 401b, supporting plate; 402, shearing arm; 402a, hinged rod; 403, connecting rod; 404, connecting table; 41, fixed bolt; 42, movable bolt; 420, connecting boss; 421, outer limiting wall; 43, second air cylinder; 430, pressing handle; 44, fixed plate. DETAILED DESCRIPTION

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the description herein and the claims of the application and the above description of the drawings herein is not intended to be complete descriptions of all features of the application; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application; the terms "comprising," "including," "containing," "consisting" and "having" and any variations thereof in the specification and in the claims are used herein to specify the presence of stated features, integers, steps or components but do not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof; the terms "first," "second," and the like in the description and in the claims of the application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

[0039] ​Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in one embodiment” in various places in the specification are not necessarily referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with other embodiments.

[0040] In order to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings.

[0041] Referring to the drawings Figure 1 - the drawings Figure 9 The embodiment discloses a fixing platform for welding a beam frame, which is used for clamping two transverse connecting pipes and clamping longitudinal connecting pieces distributed at two ends of the two transverse connecting pipes, and the fixing platform for welding the beam frame comprises a fixing frame 1, longitudinal clamping assemblies 2 installed on the fixing frame 1, a middle clamping assembly 3 and end clamping assemblies 4; the longitudinal clamping assemblies 2 are provided in two groups, the two groups of longitudinal clamping assemblies 2 are symmetrically arranged, and the two groups of longitudinal clamping assemblies 2 are respectively used for clamping two longitudinal connecting pieces; the middle clamping assembly 3 is provided in two groups, the two groups of middle clamping assemblies 3 clamp two transverse connecting pipes from the front-to-back direction; the end clamping assemblies 4 are provided in two groups, and the two groups of end clamping assemblies 4 are respectively used for clamping two ends of the beam frame; the end clamping assembly 4 comprises an inner support 40, fixed bolts 41 and movable bolts 42; the inner support 40 is provided with two support sleeves 400, the openings of the two support sleeves 400 face opposite directions, the two support sleeves 400 of the inner support 40 extend into the inner cavity of the beam frame, one end of the fixed bolt 41 penetrates through the side wall of the beam frame and abuts against one support sleeve 400, and one end of the movable bolt 42 penetrates through the other side wall of the beam frame and abuts against the other support sleeve 400.

[0042] As Figure 1The fixed platform is used to clamp the transverse connecting pipe and the longitudinal connecting piece for welding, and the fixed platform is clamped and fixed based on the structure of the existing beam frame. Specifically, the beam frame includes the transverse connecting pipe A, the transverse connecting pipe B and the longitudinal connecting pieces on both sides, the bottom of the side wall at both ends of the transverse connecting pipe A has a bottom opening, the side wall at the bottom opening has two mounting holes for connecting with the external structure, the end clamping assembly 4 of the embodiment clamps the beam frame through the bottom opening and the corresponding mounting hole, and the middle part of the transverse connecting pipe A and the transverse connecting pipe B are clamped by the middle clamping assembly 3. For example, the end clamping assembly 4 includes the inner support 40 that can extend into the beam frame and the external fixed pin 41 and the movable pin 42 to achieve clamping and fixing. The fixed pin 41 and the movable pin 42 are respectively arranged corresponding to the two mounting holes, and the inner support 40 is provided with two support sleeves 400 with opposite openings. When the two support sleeves 400 extend into the beam frame through the preset instruction, the two support sleeves 400 are respectively aligned with the two mounting holes, so that the fixed pin 41 or the movable pin 42 can be inserted into the beam frame through the mounting hole and abut against the support sleeve 400, thereby completing the clamping and fixing of this part of the beam frame. The specific assembly process is as follows: the mounting hole on the inner side of the beam frame is sleeved on the fixed pin 41, then the two support sleeves 400 of the inner support 40 extend into the beam frame through the bottom opening of the beam frame, so that one support sleeve 400 abuts against the fixed pin 41, and finally the movable pin 42 is inserted into the beam frame from the outer side of the beam frame through the other mounting hole and abuts against the other support sleeve 400, thereby completing the end clamping and fixing of the end clamping assembly 4 to the end of the transverse connecting pipe A of the beam frame. The support sleeve 400 and the movable pin 42, and the support sleeve 400 and the fixed pin 41 clamp and fix the shell wall with the bottom opening of the beam frame, effectively avoiding the local deformation of the outer wall of the beam frame, and improving the yield rate of the beam frame after welding.

[0043] In summary, when the cross beam needs to be welded, the following process can be used to place it on the fixed platform. The two transverse connecting pipes are clamped and positioned by the two middle clamping assemblies 3, and the mounting holes of the transverse connecting pipes are ensured to be sleeved on the fixed pins 41. Then the two support sleeves 400 of the inner support 40 are inserted into the transverse connecting pipe through the bottom opening of the transverse connecting pipe, and one of the support sleeves 400 abuts against the fixed pin 41. Then the movable pin 42 is inserted into the transverse connecting pipe from the mounting hole on the other side of the transverse connecting pipe, and the other support sleeve 400 abuts against the movable pin 42, forming a clamping form in which the support sleeve 400 and the fixed pin 41 and the support sleeve 400 and the movable pin 42 clamp one side wall of the transverse connecting pipe respectively, avoiding local deformation of the cross beam, and improving the yield rate after welding. Finally, the two longitudinal connecting pieces are placed on the longitudinal clamping assembly 2, so that the side wall of the longitudinal connecting piece abuts against the end of the transverse connecting pipe, so as to facilitate subsequent welding. In general, the fixed platform uses the inner support 40 which can be inserted into and out of the transverse connecting pipe, realizes the clamping form in which the support sleeve 400 and the fixed pin 41 and the support sleeve 400 and the movable pin 42 clamp one side wall of the transverse connecting pipe respectively, solves the problem that the traditional clamping tool only uses external clamping to cause local deformation of the cross beam, and effectively improves the yield rate of the cross beam after welding.

[0044] Referring to the drawings Figure 6 and the drawings Figure 7The inner support 40 comprises a first air cylinder 401 and a scissor structure. The first air cylinder 401 is mounted on the fixed frame 1, and is provided with an extension rod 401a and support plates 401b distributed on both sides of the extension rod 401a. The scissor structure has two scissor arms 402 hingedly connected to each other, and the hinge connection of the two scissor arms 402 is provided with a hinge rod 402a connected with the two support plates 401b. The bottom ends of the two scissor arms 402 are connected with the extension rod 401a, and the top ends of the two scissor arms 402 are respectively provided with two support sleeves 400. The support sleeves 400 can be driven to move up and down by the first air cylinder 401. Specifically, the first air cylinder 401 is mounted on the fixed frame 1, and the extension rod 401a extends upward. The up-and-down movement of the extension rod 401a is controlled by the first air cylinder 401, so as to drive the scissor structure to open and close, and the two top ends of the support sleeves 400 are driven to move up and down, so that the two support sleeves 400 can be inserted into and extended out of the horizontal connecting pipe. When the two support sleeves 400 respectively abut against the fixed bolt 41 and the movable bolt 42, the distance between the two support sleeves 400 is the largest. In order to facilitate the driving of the extension rod 401a on the scissor structure, the hinge rod 402a penetrates the hinge connection of the two scissor arms 402 and is connected with the two support plates 401b. The bottom ends of the two scissor arms 402 are respectively provided with connecting rods 403. The top of the extension rod 401a is provided with a connecting table 404. One end of the connecting rod 403 is hingedly connected with the scissor arm 402, and the other end is hingedly connected with the connecting table 404. The extension rod 401a drives the connecting table 404 to move up and down, thereby driving the connecting rod 403 to swing and further driving the two scissor arms 402 to open and close, so as to complete the movement of the support sleeves 400 moving upward and away from each other or moving downward and close to each other.

[0045] As shown in Figure 7 , the end of the movable bolt 42 and the end of the fixed bolt 41 are respectively provided with an outer limiting wall 421 for contacting the side wall of the horizontal connecting pipe and a connecting boss 420 arranged on the outer limiting wall 421. The connecting boss 420 penetrates the side wall of the horizontal connecting pipe and abuts against the support sleeve 400. The end of the support sleeve 400 is provided with an inner limiting wall 400a for contacting the inner wall of the horizontal connecting pipe. The connecting boss 420 penetrates the mounting hole of the horizontal connecting pipe and abuts against the support sleeve 400. The outer limiting wall 421 and the inner limiting wall 400a form a clamping state of the horizontal connecting pipe, thereby improving the stability of the clamping. Since the connecting boss 420 of the fixed bolt 41 is arranged in the horizontal connecting pipe before the support sleeve 400 is inserted into the horizontal connecting pipe, the support sleeve 400 of the embodiment is further provided with a lateral notch 400b. The lateral notch 400b is arranged on one side of the axis of the support sleeve 400, so that when the support sleeve 400 enters the horizontal connecting pipe from bottom to top, the lateral notch 400b is not interfered by the connecting boss 420 of the fixed bolt 41.

[0046] In order to make the movable plug 42 can be from the installation hole into and out of the transverse pipe, the end clamping assembly 4 includes a second cylinder 43 for driving the movable plug 42 to move, the tail of the second cylinder 43 is provided with a pressing handle 430, operating the pressing handle 430 can drive the movable plug 42 to move by the second cylinder 43, in use, by bending the pressing handle 430 downward, the connecting boss 420 of the movable plug 42 can be inserted into the transverse pipe and abut against the supporting sleeve 400, on the contrary, bending the pressing handle 430 upward, the movable plug 42 is separated from the transverse pipe, and the fixed plug 41 does not need to be changed because of the predetermined position, the end clamping assembly 4 of the embodiment further includes a fixed plate 44 for fixing on the fixed plug 41, the fixed plate 44 is directly bolted on the fixed frame 1, and the top of the fixed part is used for installing on the fixed plug 41.

[0047] Referring to the accompanying drawings Figure 3 , the accompanying drawings Figure 4 , and the accompanying drawings Figure 8 , the middle clamping assembly 3 includes a bottom lifting frame 30, a side limiting rod 31 and a top pressing frame 32, the bottom lifting frame 30, the side limiting rod 31 and the top pressing frame 32 form a middle clamping space, the middle part of the transverse pipe is clamped and fixed through the middle clamping space, wherein the side limiting rod 31 is an upwardly curved rod structure, the top pressing frame 32 includes a pressing rod 321 and a top supporting frame 320, the middle part of the pressing rod 321 is hinged to the top supporting frame 320, and the two ends of the pressing rod 321 are provided with pressing blocks 321a in contact with the outer wall of the transverse pipe, the middle hinged pressing rod 321 can be adapted to the arc-shaped outer wall of the transverse pipe, so that the two ends of the pressing blocks 321a are uniformly stressed, and the upwardly curved side limiting rod 31 facilitates placing the transverse pipe on the bottom lifting frame 30, and simultaneously plays a side limiting effect, it should be noted that the bottom lifting frame 30 is divided into a front end lifting structure 300 and a rear end lifting structure 301 which are independent of each other, wherein the front end lifting structure 300 is used for placing the transverse pipe A (with a bottom opening), the front end lifting structure 300 has a shorter overall length to avoid interference with the end clamping assembly 4 at both ends, and the front end lifting structure 300 includes a plurality of inclined lifting blocks which contact the bottom side wall of the transverse pipe A to achieve lifting, and finally cooperate with the pressing rod 321 to achieve clamping of the transverse pipe A; the rear end lifting structure 301 is used for placing the transverse pipe B (without a bottom opening), since the end clamping assembly 4 is not distributed at both ends, the rear end lifting structure 301 has a longer overall length to clamp the transverse pipe B more stably, and the rear end lifting structure 301 can be provided with corresponding positioning columns on the bottom outer hole of the transverse pipe B, so as to facilitate positioning of the transverse pipe B, and cooperate with the pressing rod 321 to achieve clamping of the transverse pipe B.

[0048] Referring to the accompanying drawings Figure 3 , the accompanying drawings Figure 4and attached Figure 9 The longitudinal clamping assembly 2 comprises a bottom supporting plate 20 for supporting the longitudinal connecting piece and two sets of end positioning members corresponding to the two ends of the longitudinal connecting piece, and the end positioning members are used for clamping the upper and lower outer walls of the longitudinal connecting piece. Specifically, the end positioning member comprises a bottom positioning pin 21 and a top positioning pin 22, and the fixed frame 1 is provided with a supporting table 10 for fixing the bottom positioning pin 21 and the top positioning pin 22. The bottom positioning pin 21 passes through the bottom wall of the longitudinal connecting piece from the bottom, and the top positioning pin 22 passes through the top wall of the longitudinal connecting piece from the top, and the bottom positioning pin 21 and the top positioning pin 22 are coaxially arranged. The two positioning pins of the end positioning member are mainly arranged according to the external holes at the two ends of the longitudinal connecting piece, that is, the positioning of the longitudinal connecting piece is realized, and the clamping is realized through the top positioning pin 22 and the bottom positioning pin 21. The bottom supporting plate 20 is mainly used for supporting the middle region of the longitudinal connecting piece, and the longitudinal clamping assembly 2 can also be provided with a structure similar to the pressing rod 321 to limit and press the top wall of the middle region of the longitudinal connecting piece.

[0049] In order to facilitate the fixation of the longitudinal connecting piece on the longitudinal clamping assembly 2, the top positioning pin 22 is a reversible structure. Specifically, the end positioning member further comprises a connecting fork arm 23, one end of the connecting fork arm 23 is hinged to the supporting table 10, and the other end of the connecting fork arm 23 is used for mounting on the top positioning pin 22. After the longitudinal connecting piece is placed on the bottom supporting plate 20 and it is ensured that the external holes at the two ends are connected with the bottom positioning pin 21, the connecting fork arm 23 is swung to insert the top positioning pin 22 into the external hole at the top of the longitudinal connecting piece, so as to realize the fixed form of the top positioning pin 22 and the bottom positioning pin 21 clamping the longitudinal connecting piece together.

[0050] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application. The present application can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or make equivalent substitutions for part of the technical features. Any equivalent structure made by using the contents of the present application specification and drawings, directly or indirectly applied to other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A fixing platform for welding crossbeams, used to clamp two transverse connecting pipes and longitudinal connecting parts distributed at both ends of the two transverse connecting pipes, characterized in that, The fixing platform for welding crossbeams includes: a fixing frame, a longitudinal clamping assembly mounted on the fixing frame, a middle clamping assembly, and an end clamping assembly; The longitudinal clamping assembly is provided in two sets, which are symmetrically distributed and used to clamp two longitudinal connectors respectively. The central clamping assembly is provided in two sets, and the two sets of central clamping assemblies clamp the two transverse connecting pipes from the front and rear directions; The end clamping assembly is provided in two sets, and the two sets of end clamping assemblies are respectively used to clamp the two ends of the transverse connecting pipe; the end clamping assembly includes an inner support, a fixed pin and a movable pin; The inner support member is provided with two support sleeves, the openings of the two support sleeves facing opposite directions. The two support sleeves of the inner support member extend into the inner cavity of the transverse connecting pipe. One end of the fixed pin passes through the side wall of the transverse connecting pipe and abuts against one of the support sleeves. One end of the movable pin passes through the other side wall of the transverse connecting pipe and abuts against the other support sleeve.

2. The fixed platform for welding crossbeams according to claim 1, characterized in that, The internal support component includes a first cylinder and a scissor structure; The first cylinder is mounted on a fixed frame, and the first cylinder is equipped with a telescopic rod and support plates distributed on both sides of the telescopic rod; The scissor structure has two scissor arms that are hinged to each other. The hinge joint of the two scissor arms is provided with a hinge rod that is connected to two support plates. The bottom ends of the two scissor arms are connected to a telescopic rod. The top ends of the two scissor arms are respectively fixed with two support sleeves. The support sleeves can be moved up and down by the first cylinder.

3. A fixed platform for welding crossbeams according to claim 2, characterized in that, Both the end of the movable pin and the end of the fixed pin are provided with an outer limiting wall for contacting the side wall of the transverse connecting pipe and a connecting boss provided on the outer limiting wall. The connecting boss passes through the side wall of the transverse connecting pipe and abuts against the support sleeve. The end of the support sleeve is provided with an inner limiting wall for contacting the inner wall of the transverse connecting pipe.

4. A fixed platform for welding crossbeams according to claim 2, characterized in that, The end clamping assembly includes a second cylinder for driving the movable pin to move, and a clamping handle is provided at the tail of the second cylinder. By operating the clamping handle, the movable pin can be moved by the second cylinder. The end clamping assembly also includes a fixing plate for fixing the fixed pin.

5. A fixed platform for welding crossbeams according to claim 2, characterized in that, The sidewall of the support sleeve is provided with a lateral notch.

6. A fixed platform for welding crossbeams according to claim 1, characterized in that, The central clamping assembly includes a bottom lifting frame, a side limiting rod, and a top pressing frame. The bottom lifting frame, the side limiting rod, and the top pressing frame enclose a central clamping space, through which the central part of the transverse connecting pipe is clamped and fixed.

7. A fixed platform for welding crossbeams according to claim 6, characterized in that, The side limiting rod is an upwardly outwardly bent rod-shaped structure. The top clamping frame includes a clamping rod and a top support frame. The middle part of the clamping rod is hinged to the top support frame. Both ends of the clamping rod are provided with clamping blocks that contact the outer wall of the transverse connecting pipe.

8. A fixed platform for welding crossbeams according to claim 1, characterized in that, The longitudinal clamping assembly includes a bottom support plate and two sets of end positioning members. The bottom support plate is used to support the longitudinal connector. The two sets of end positioning members are respectively provided at both ends of the longitudinal connector, and the end positioning members are used to clamp the upper and lower outer walls of the longitudinal connector.

9. A fixed platform for welding crossbeams according to claim 8, characterized in that, The end positioning component includes a bottom positioning pin and a top positioning pin. The fixing frame is provided with a support platform for fixing the bottom positioning pin and the top positioning pin. The bottom positioning pin passes through the bottom wall of the longitudinal connecting member from the bottom, and the top positioning pin passes through the top wall of the longitudinal connecting member from the top. The bottom positioning pin and the top positioning pin are coaxially arranged.

10. A fixed platform for welding crossbeams according to claim 9, characterized in that, The end positioning component also includes a connecting fork arm, one end of which is hinged to the support platform, and the other end of which is used to be mounted on the top positioning pin.

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