CN105108420B - Frame welding clamp used for cub-type motorcycle sample - Google Patents

Abstract

The invention discloses a frame welding clamp used for a cub-type motorcycle sample. The frame welding clamp is characterized by comprising a three-dimensional installing platform, a frame front half body positioning clamp structure, a rear beam tube front positioning welding clamp structure, a rear beam tube rear positioning welding clamp structure and a rear beam tube tail positioning welding clamp structure, wherein multiple installing holes are arrayed at a fixed distance in the upper surface and periphery side surface of the three-dimensional installing platform, and the frame front half body positioning clamp structure, the rear beam tube front positioning welding clamp structure, the rear beam tube rear positioning welding clamp structure and the rear beam tube tail positioning welding clamp structure are arranged on the three-dimensional installing platform. The welding assembly process can be simplified, and the frame welding clamp has the advantages of being easy to operate, low in cost, capable of facilitating trial-manufacture adjustment of the cub-type motorcycle sample and the like.

Description

Frame Welding Fixture for Bending Beam Car Sample

technical field

The invention relates to the field of motorcycle frame processing, in particular to a frame welding jig for curved beam vehicle samples.

Background technique

The curved beam motorcycle refers to the motorcycle type in which the main beam of the motorcycle in front of the seat cushion is bent from the right front to the rear to form a downward gap in front of the seat cushion. Underbone motorcycles are the most common motorcycles nowadays. Among the motorcycle family, its durability, simple operation and other characteristics are deeply loved by consumers. As an economical and practical vehicle, the underbone motorcycle has become a popular vehicle suitable for various consumer groups. At the same time, in the process of motorcycle research and development, it is often necessary to develop and design sample products first, and then conduct tests to ensure the reliability and practicability of the final product.

In a new underbone motorcycle with a model number of LF110, its frame structure includes a front half structure of the frame at the front and a rear beam tube structure at the rear, and the front half structure of the frame mainly includes a vertical The rear side of the standpipe is connected to the main beam tube that bends backward and downward as a whole. The rear end of the main beam tube is also fixedly welded with an engine suspension mounting plate. The rear end of the main beam tube is welded and fixed, and a flat fork shaft is fixed and fixed in the left and right sides of the middle of the engine suspension mounting plate; the rear beam tube structure mainly includes two rear upper beam tubes arranged side by side and two rear lower beam tubes arranged side by side , the front end of the rear upper beam tube is welded and fixed to the middle and rear part of the main beam tube, the rear end is set obliquely to the rear and upward, the front end of the rear lower beam tube is welded and fixed to the engine suspension mounting plate, and the rear end is extended obliquely upwards and pasted It is welded and fixed on the lower surface of the rear part of the rear upper beam tube; during processing, it is also necessary to consider welding and fixing an inverted U-shaped fuel tank front bracket and a seat cushion bracket in the front position between the two rear upper beam tubes from front to back; The rear part of the two rear upper beam tubes needs to be installed with a rear shock absorbing shaft, and the rear shock absorbing shaft runs through and is fixed on the two rear shock absorbing shaft lugs that protrude upward and connect to the upper surface of the rear part of the two rear upper beam tubes. , the upper ends of the two rear shock-absorbing lugs are also transversely fixed with a rear shock-absorbing lug reinforcing beam, and the two ends of the rear shock-absorbing lug reinforcing beam expose the rear shock-absorbing lugs and are respectively welded and fixed forward. The rear bracket of the fuel tank is welded and fixed successively with a car body cover lug; the tail ends of the two rear upper beam tubes are also welded upward and fixed with a seat cushion lock bracket with an overall inverted U-shaped frame structure, and the left and right sides of the seat cushion lock bracket Each side is welded to fix a tail cover lug.

For the curved beam frame of the above structure, when the motorcycle is developed and produced as a sample, usually after the processing of the front half structure of the frame is completed, the individual welding and fixing of the rear beam tube structure and the accessories on it are completed one by one, and finally the overall welding is completed. Integral to form the frame. Like this, there are numerous working procedures, complicated operation, and the defects that the cost is too high. Especially because sample production often needs to adjust small structures such as some local auxiliary components, in this way, welding fixtures with fixed structures are used for each adjustment, which greatly increases the cost and restricts the expansion of sample research and development.

Contents of the invention

Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is: how to provide a sample frame for curved beam vehicles that can simplify the process, make it easy to operate, low in cost, and further enable it to be convenient for trial production and adjustment. Welding fixture.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: when describing in the scheme, the state after it is installed on the vehicle frame is used as the orientation description reference.

A frame welding jig for a curved beam vehicle sample, characterized in that the welding jig includes a three-dimensional installation platform with a number of installation holes arranged in an array at fixed intervals on the upper surface and the peripheral side surface, and is arranged on the three-dimensional installation platform. The positioning fixture structure of the front half of the vehicle frame, the positioning welding fixture structure of the front part of the rear beam tube, the positioning welding fixture structure of the rear part of the rear beam tube and the positioning welding fixture structure of the rear part of the rear beam tube; The positioning of the front half body; the positioning welding fixture structure of the front part of the rear beam tube is used to realize the positioning of the front part of the rear lower beam tube, the front part of the rear upper beam tube, the front support of the fuel tank and the seat cushion bracket; the positioning of the rear part of the rear beam tube The welding fixture structure is used to realize the positioning of the rear part of the rear lower beam tube, the rear shock absorber shaft lug, the rear shock absorber shaft, the fuel tank rear bracket and the car body cover lug; the rear beam tube tail positioning welding fixture structure is used for Realize the positioning of the rear part of the rear upper beam tube, the seat cushion lock bracket and the tail cover lug.

In this way, the welding fixture of the above scheme can realize the clamping and positioning between the front half body of the vehicle frame, the rear beam tube structure and the auxiliary components on the rear beam tube structure at the same time, so that after positioning, the welding torch can be directly used to realize the clamping and positioning of each component. The welding between them is fixed. The mutual position accuracy of each component is reliable and the welding operation is convenient and quick, which saves the cost.

As an optimization, the positioning fixture structure of the front half of the frame includes a riser positioning assembly and a flat fork shaft positioning assembly;

The standpipe positioning assembly includes a standard square box for standpipe positioning with an overall rectangular structure, and each side of the standard square box for standpipe positioning is arrayed according to the same spacing and aperture as the installation holes on the three-dimensional installation platform A number of installation holes are arranged, and the standard square box for standpipe positioning is fixed on the middle part of the front side of the three-dimensional installation platform by bolts and extended upwards. A standard angler for pipe positioning, the standard angler for standpipe positioning includes a fixed block and a rotating block each having a hinged end and an opening and closing end, the hinged ends of the fixed block and the rotating block can be rotatably hinged, and a useful To realize the rotation angle positioning pin of the rotation angle positioning, several installation holes are arranged on the fixed block and the rotation block according to the same spacing and aperture array as the installation holes on the three-dimensional installation platform, and the standard angler is used for the positioning of the standpipe The opening and closing end of the fixed block is arranged forward and fixed horizontally on the upper surface of the standard square box for standpipe positioning by bolts. The middle part of the upper surface of the rotating block of the standard angler for standpipe positioning is fixed upward with a standpipe positioning round table. The diameter of the standpipe positioning round platform matches the outer diameter of the lower end of the standpipe, and the axis of the standpipe positioning round platform is coaxially provided with a standpipe positioning column matching the inner diameter of the standpipe, and the upper end of the standpipe positioning column is movable. The standpipe compression fixing block used to compress the standpipe after positioning;

The flat fork shaft positioning assembly includes two flat fork shaft positioning and supporting angle irons with an overall right-angled trapezoidal frame structure, and each side of the flat fork shaft positioning and supporting angle irons is at the same distance as the installation holes on the three-dimensional installation platform There are several installation holes arranged in the aperture array, and the lower end of the positioning support angle iron of the flat fork shaft is fixed on the middle part of the three-dimensional installation platform by bolts and arranged opposite to the left and right; The extended flat fork shaft positioning block, the distance between the two flat fork shaft positioning blocks matches the width of the left and right sides of the engine suspension mounting plate, the front upper end of the two flat fork shaft positioning blocks is provided with a flat fork shaft positioning groove and is used to achieve alignment The positioning of both ends of the fork shaft.

In this way, when in use, first adjust the angle of the standpipe positioning standard angler to the required angle, and then insert the standpipe into the standpipe positioning column so that the lower end and the standpipe positioning round table are abutted and supported to realize the standpipe Then the upper end of the standpipe can be completely fixed by pressing the standpipe compression fixing block; then the engine suspension mounting plate at the rear of the front half of the frame is dropped between the two flat fork shaft positioning support angle irons , and make the left and right sides of the engine suspension mounting plate expose the end of the flat fork shaft fall into the flat fork shaft positioning groove on the flat fork shaft positioning block to realize the positioning of the two ends of the flat fork shaft. In this way, the positioning and clamping of the front half body of the vehicle frame is realized with a simple structure by means of three-point positioning. The reliability of subsequent welding is guaranteed, the mutual position accuracy of each component is reliable, the welding operation is convenient and fast, and the cost is saved. At the same time, due to the use of standard square boxes, supporting angle irons, standard anglers, three-dimensional installation platforms and other non-standard positioning components to achieve connection and cooperation, each positioning structure can be flexibly and conveniently adjusted and installed according to needs, making it very It is suitable for use when trial production of samples needs to adjust the position of local components of each component, which greatly saves the cost of research and development. At the same time, the positioning support angle iron of the flat fork shaft can also facilitate the subsequent installation of the components for positioning the rear beam tube and its upper accessories, which is beneficial to saving space and simplifying costs.

As an optimization, the positioning welding fixture structure at the front of the rear beam tube includes a positioning assembly at the front of the rear upper beam tube, a positioning assembly at the front support of the fuel tank, a positioning assembly at the seat cushion bracket and a positioning assembly at the front of the rear lower beam tube;

The positioning assembly for the front part of the rear upper beam tube includes two positioning and supporting angle irons for the front part of the rear upper beam tube in a right-angled trapezoidal frame structure. The installation holes on the installation platform are arranged in a consistent spacing and aperture array with several installation holes. The lower end of the positioning support angle iron at the front of the rear upper beam tube is fixed to the middle of the three-dimensional installation platform by bolts and is set opposite to the left and right; the front positioning support of the rear upper beam tube The hypotenuse of the angle iron is arranged backward and the front side is fixedly connected with a standard angler for positioning the front part of the rear upper beam tube. And the rotating block, the hinged ends of the fixed block and the rotating block can be rotatably hinged and the rotating angle positioning pin for realizing the positioning of the rotating angle is arranged at the hinge, and the fixing block and the rotating block are all according to the mounting holes on the three-dimensional installation platform A number of installation holes are arranged in a consistent spacing and aperture array, and the fixed blocks of the standard angler for positioning the front part of the rear upper beam tube are arranged vertically, with the opening and closing ends facing down and fixed horizontally on the positioning support at the front part of the rear upper beam tube by bolts The front side of the angle iron; a horizontal connecting block is fixedly connected horizontally between the rotating blocks of the standard angler for positioning the front of the two rear upper beam tubes, and two horizontal connecting blocks are arranged on the upper surface of the horizontal connecting block corresponding to the front positions of the two rear upper beam tubes. The boss for positioning the front part of the rear upper beam tube, the inner side of the boss for positioning the front part of the rear upper beam tube is provided with a positioning step for positioning the front part of the rear upper beam tube for fitting with the outer and lower sides of the front part of the rear upper beam tube;

The fuel tank front bracket positioning assembly includes a fuel tank front bracket positioning part that is formed on the upper surface of the transverse connection block between the two rear upper beam tube front positioning bosses and extends forward. The fuel tank front bracket positioning part The upper surface is provided with a fuel tank front bracket positioning boss, the upper surface of the fuel tank front bracket positioning boss is used to fit the lower surface of the fuel tank front bracket middle part to achieve positioning, and the fuel tank front bracket positioning boss corresponds to the installation hole of the fuel tank front bracket It is provided with the positioning hole of the front support of the fuel tank and the positioning pin of the front support of the fuel tank, and is used to realize the fixing after the positioning of the front support of the fuel tank;

The seat cushion bracket positioning assembly includes a seat cushion bracket positioning part formed on the upper surface of the transverse connecting block between the front positioning bosses of the two rear upper beam tubes and extending backward, the upper surface of the seat cushion bracket positioning part There are two upward seat cushion bracket positioning columns, and the upper ends of the two seat cushion bracket positioning columns are provided with seat cushion bracket positioning round tables for inserting into the two mounting holes on the seat cushion bracket for positioning;

The positioning assembly for the front part of the rear lower beam tube includes two positioning and supporting angle irons for the front part of the rear lower beam tube in a right-angled trapezoidal frame structure. The installation holes on the installation platform are arranged in a consistent spacing and aperture array with several installation holes. The lower end of the positioning support angle iron at the front of the rear lower beam tube is fixed to the middle and rear of the three-dimensional installation platform by bolts and is set opposite to the left and right; the front of the rear lower beam tube The hypotenuse of the positioning support angle iron is arranged backwards and the front side is fixedly connected with a positioning standard angler at the front of the rear lower beam tube. The standard angler at the front of the rear lower beam tube includes a hinged end and an opening end respectively The fixed block and the rotating block, the hinge ends of the fixed block and the rotating block can be rotatably hinged and the rotation angle positioning pin for realizing the rotation angle positioning is arranged at the hinge, and the fixed block and the rotating block are all according to the three-dimensional installation platform. The mounting holes are arranged in a consistent spacing and aperture array with a number of mounting holes. The front part of the rear lower beam tube is positioned vertically with the fixed block of the standard angler, and the opening and closing end is downward and fixed horizontally in front of the rear lower beam tube by bolts. The front side of the angle iron is used for positioning and supporting the front part of the rear lower beam tube; a connecting block for positioning the front part of the rear lower beam tube is fixed transversely between the rotating blocks of the standard angler used for positioning the front part of the two rear lower beam tubes, and a connecting block is used for positioning the front part of the rear lower beam tube. The upper surface of the connection block corresponds to the front position of the two rear lower beam tubes, and there are two positioning bosses for the front part of the rear lower beam tube. The upper position is snapped into the positioning groove at the front of the rear lower beam tube for positioning.

In this way, when in use, first adjust the opening angle of the front positioning standard angler of the rear upper beam tube so that the direction of the rotating block is parallel to the rear upper beam tube, and then make the front ends of the two rear upper beam tubes in the center of the positioned main beam tube. The installation position of the rear part is fit and positioned, and then the front section of the rear upper beam tube falls into the two positioning steps at the front of the rear upper beam tube to realize the positioning of the front section of the rear upper beam tube; the middle part of the front bracket of the fuel tank is pasted Fit it to the positioning boss of the front support of the fuel tank, attach the feet at both ends to the corresponding installation positions on the rear upper beam tube to realize positioning, and then insert the pin into the installation hole of the front support of the fuel tank and the positioning hole of the front support of the fuel tank to realize the positioning of the front support of the fuel tank Then, insert the two mounting holes on the seat cushion bracket into the positioning round table at the upper end of the positioning column of the seat cushion bracket, and make the legs at both ends of the seat cushion support fit to the corresponding installation positions on the rear upper beam tube to achieve alignment. Positioning of the seat cushion bracket; then adjust the opening angle of the front positioning standard angler of the rear lower beam tube so that its rotating block is parallel to the rear lower beam tube, and then align the front end of the rear lower beam tube with the positioned engine suspension mounting plate The upper corresponding installation position fits together, and the front of the rear lower beam tube falls into the corresponding front positioning groove of the rear lower beam tube to realize the positioning of the front part of the rear lower beam tube. In this way, the positioning of the front section of the rear beam tube and its auxiliary components can be realized, and the welding torch can be used to realize the positioning between the rear upper beam tube, the rear lower beam tube and the front half of the frame, as well as the front bracket and seat of the fuel tank. Welded fixation between pad bracket and rear upper beam tube. The mutual position accuracy of each component is reliable and the welding operation is convenient and quick, which saves the cost. At the same time, due to the use of supporting angle irons, standard anglers, three-dimensional installation platforms and other non-standard positioning components to achieve connection and cooperation, each positioning structure can be flexibly and conveniently adjusted and installed according to needs, making it very suitable for testing It is used when the sample trial production needs to adjust the local component position of each component, which greatly saves the research and development cost. At the same time, some of the non-standard positioning components can realize the positioning of multiple components at the same time, and the structural arrangement is ingenious and ensures the accuracy of mutual positions.

As an optimization, the rear beam tube rear positioning welding fixture structure includes a rear lower beam tube rear positioning assembly, a rear shock absorber shaft and a rear shock absorber shaft lug positioning assembly, a fuel tank rear bracket positioning assembly, and a vehicle body cover piece lug positioning assembly. components;

The positioning assembly at the rear of the rear lower beam tube includes two positioning support angle irons at the rear of the rear lower beam tube in a right-angled trapezoidal frame structure. The installation holes on the installation platform are arranged in a consistent spacing and aperture array with a number of installation holes. The lower end of the positioning support angle iron at the rear of the rear lower beam tube is fixed to the middle and rear of the three-dimensional installation platform by bolts and is set opposite to the left and right; the rear of the rear lower beam tube The hypotenuse of the positioning support angle iron is arranged backward, and the upper position of the inner surface is fixedly connected with a positioning block at the rear of the rear lower beam tube. The positioning groove at the rear of the rear lower beam tube;

The rear shock absorber shaft and the rear shock absorber shaft lug positioning assembly include two rear shock absorber shaft positioning blocks respectively fixed on the front side of the upper part of the positioning support angle iron at the rear of the two rear lower beam tubes, and the rear shock absorber shaft positioning block The front end is bent and extended inwardly and forwardly, and a rear shock absorber shaft positioning groove is provided on the upper side of the front end to realize the positioning of the rear shock absorber shaft and the rear shock absorber shaft lug;

The vehicle body cover lug positioning assembly includes two vehicle body cover lug positioning components respectively fixed on the inner side of the upper part of the positioning support angle iron at the rear of the two rear lower beam tubes above the positioning block of the rear shock absorber shaft. Block, the positioning block of the vehicle body cover lug has a vehicle body cover lug positioning part that extends forward and the lower surface is used for positioning the lower surface of the vehicle body cover lug. The mounting holes on the surface corresponding to the body cover are provided with positioning bolt holes for the lugs of the body cover, and the positioning bolt holes for the lugs of the body cover are used for positioning and clamping the lugs of the body cover by screwing in the bolts ;

The fuel tank rear bracket positioning assembly includes two left and right symmetrical arrangements and an overall L-shaped frame structure for positioning and supporting angle irons for the fuel tank rear brackets. The hole spacing and hole diameter array are arranged with a number of installation holes, which are respectively set in the front of the positioning support angle iron at the rear of the two rear lower beam tubes; the inner sides of the positioning support angle iron of the two fuel tank rear brackets are each fixed with a fuel tank rear support Positioning block, fuel tank rear bracket The positioning block has a fuel tank rear bracket positioning part that extends backward and upward and its lower surface is used for fitting and positioning the upper surface of the fuel tank rear bracket. The lower surface of the fuel tank rear bracket positioning part corresponds to the mounting hole on the fuel tank rear bracket. There are positioning bolt holes for the rear support of the fuel tank, and the positioning bolt holes for the rear support of the fuel tank are used for positioning and clamping the rear support of the fuel tank by screwing in the bolts.

In this way, when in use, the rear part of the rear lower beam tube that has been positioned at the front is first embedded in the positioning groove at the rear part of the rear lower beam tube to realize the positioning of the rear lower beam tube; then the rear shock absorbing shaft is inserted into the two rear In the rear shock absorber shaft hole of the shock absorber lug, adjust the left and right position of the rear shock absorber lug on the rear shock absorber shaft so that the lower end of the rear shock absorber lug fits to the corresponding installation position on the rear upper beam tube, And make both ends of the rear shock absorbing shaft fall into the positioning groove of the rear shock absorbing shaft, and realize the positioning of the rear shock absorbing shaft and the rear shock absorbing shaft lug at the same time; Corresponding to the installation position on the rear shock absorber shaft, the upper surface of the rear end and the lower surface of the positioning part of the lug of the car body cover are fitted together, and the bolts are screwed in to realize the positioning and locking of the lug of the car body cover; the rear end of the fuel tank rear support Fit with the corresponding installation position on the rear shock absorber shaft, and make the upper surface of the front end fit with the lower surface of the positioning part of the rear support of the fuel tank, and then screw in the bolts to realize the positioning and locking of the rear support of the fuel tank. In this way, the positioning of the rear section of the back beam tube and the auxiliary components on it is realized, and the welding and fixing of the auxiliary components on it can be realized at one time by using a welding torch. The mutual position accuracy of each component is reliable and the welding operation is convenient and quick, which saves the cost. At the same time, due to the use of supporting angle irons, standard anglers, three-dimensional installation platforms and other non-standard positioning components to achieve connection and cooperation, each positioning structure can be flexibly and conveniently adjusted and installed according to needs, making it very suitable for testing It is used when the sample trial production needs to adjust the local component position of each component, which greatly saves the research and development cost. At the same time, some of the non-standard positioning components can realize the positioning of multiple components at the same time, and the structural arrangement is ingenious and ensures the accuracy of mutual positions.

As an optimization, the positioning welding fixture structure at the tail of the rear beam tube includes a positioning assembly at the rear of the upper beam tube, a positioning assembly for the seat cushion lock bracket, and a positioning assembly for the tail cover lug;

The rear upper beam tube rear positioning assembly includes a standard square box for positioning the rear upper beam tube rear with a rectangular structure as a whole. The installation holes on the installation platform are arranged in a consistent spacing and aperture array with a number of installation holes. The rear part of the rear upper beam tube is positioned in the middle of the rear end of the three-dimensional installation platform with a standard square box. The rear part of the rear upper beam tube is positioned The assembly also includes a positioning block at the rear of the rear upper beam tube which is horizontally fixed on the upper part of the front surface of the standard square box used for positioning the rear of the rear upper beam tube. The two sides correspondingly protrude upward to form a positioning boss at the rear of the rear upper beam tube, and the positioning boss at the rear of the rear upper beam tube is provided with a positioning groove at the rear of the rear upper beam tube for embedded positioning at the rear of the rear upper beam tube;

The seat cushion lock bracket positioning assembly includes two seat cushion lock support positioning columns symmetrically arranged on the upper end surface of the standard square box for positioning the rear upper beam tube, and the seat cushion lock support positioning column is provided with a seat cushion lock bracket positioning column. The boss is used to insert into the two mounting holes at the end of the seat cushion lock bracket to achieve positioning;

The tail cover lug positioning assembly includes two tail cover lug positioning angle irons symmetrically arranged on the upper ends of the left and right sides of the standard square box for positioning the rear upper beam tube. The tail cover lug positioning angle iron is L-shaped as a whole. Frame structure and a number of installation holes are arranged on each side according to the same spacing and aperture array as the installation holes on the three-dimensional installation platform. The lower part of the tail cover lug positioning angle iron has a backward transverse extension and is fixed by bolts The front side of the standard square box is used for positioning the rear of the beam tube. The tail cover lug positioning block is provided on the inner side of the tail cover lug positioning angle iron. The threaded through hole is screwed in by the bolt to realize the positioning and clamping of the lug of the tail cover.

In this way, when in use, the rear of the rear upper beam tube whose front portion has been positioned is first dropped into the corresponding rear upper beam tube rear positioning groove to realize the positioning of the rear upper beam tube rear portion; then the seat cushion lock The lower end of the bracket is attached to the corresponding installation position on the rear upper beam tube, and the two mounting holes at the rear upper end of the seat cushion lock bracket are inserted into the positioning bosses at the upper end of the positioning column of the seat cushion lock bracket to realize the alignment of the seat cushion lock bracket. Then fit the inner ends of the two tail cover lugs to the corresponding installation positions on the seat cushion lock bracket after positioning, and make the outer ends of the two tail cover lugs fit with the positioning block of the tail cover lugs, and then Bolts are screwed into the mounting holes on the lugs of the tail cover and the threaded through holes on the positioning block of the lugs of the tail cover to realize the positioning and locking of the two lugs of the tail cover. In this way, the positioning of the tail of the rear upper beam tube and the auxiliary components on it is realized, and the welding and fixing of the upper auxiliary components can be realized at one time by using a welding torch. The mutual position accuracy of each component is reliable and the welding operation is convenient and quick, which saves the cost. At the same time, due to the use of supporting angle irons, standard square boxes, three-dimensional installation platforms and other non-standard positioning components to achieve connection and cooperation, each positioning structure can be flexibly and conveniently adjusted and installed according to needs, making it very suitable for testing It is used when the sample trial production needs to adjust the local component position of each component, which greatly saves the research and development cost. At the same time, some of the non-standard positioning components can realize the positioning of multiple components at the same time, and the structural arrangement is ingenious and ensures the accuracy of mutual positions.

To sum up, the present invention can simplify the welding assembly process, has the advantages of simple operation, low cost, and convenient trial production and adjustment of bending beam car samples.

Description of drawings

Fig. 1 is a side view of the best embodiment of the present invention.

Fig. 2 is a top view of the best embodiment of the present invention.

Fig. 3 is a side view of the best embodiment of the present invention in use.

Fig. 4 is a top view of the best embodiment of the present invention in use.

detailed description

The present invention will be further described in detail below in conjunction with the best implementation mode and accompanying drawings. When describing in the scheme, the state after it is installed on the frame is used as the orientation description benchmark. The vehicle frame described in the scheme is the underbone motorcycle frame of the model LF110 described in the background art.

The optimal implementation mode: as shown in Figure 1-4, a frame welding fixture for bending beam vehicle samples, wherein the welding fixture includes a number of mounting holes arranged in an array at fixed intervals on the upper surface and the peripheral side surface The three-dimensional installation platform 1, and the positioning fixture structure of the front half of the frame, the positioning welding fixture structure of the front part of the rear beam tube, the positioning welding fixture structure of the rear part of the rear beam tube and the positioning welding fixture structure of the rear part of the rear beam tube arranged on the three-dimensional installation platform 1; The front half body positioning fixture structure of the frame is used to realize the positioning of the front half body of the frame; and the positioning of the seat cushion bracket 3; the positioning welding fixture structure at the rear of the rear beam tube is used to realize the rear part of the rear lower beam tube, the rear shock absorber shaft lug 4, the rear shock absorber shaft 5, the fuel tank rear bracket 6 and the car body Positioning of the lug 7 of the cover part; the positioning welding fixture structure at the tail of the rear beam tube is used to realize the positioning of the rear part of the rear upper beam tube, the seat cushion lock bracket 8 and the lug 9 of the tail cover.

In this way, the welding fixture of the above scheme can realize the clamping and positioning between the front half body of the vehicle frame, the rear beam tube structure and the auxiliary components on the rear beam tube structure at the same time, so that after positioning, the welding torch can be directly used to realize the clamping and positioning of each component. The welding between them is fixed. The mutual position accuracy of each component is reliable and the welding operation is convenient and quick, which saves the cost.

Wherein, the positioning fixture structure of the front half of the vehicle frame includes a riser positioning assembly and a flat fork shaft positioning assembly;

The standpipe positioning assembly includes a standard square box 10 for standpipe positioning with a rectangular structure as a whole, and each side of the standard square box 10 for standpipe positioning is at the same distance as the installation holes on the three-dimensional installation platform 1. There are several mounting holes arranged in the aperture array, the standard square box 10 for standpipe positioning is fixed on the middle part of the front side of the three-dimensional installation platform 1 by bolts and extended upwards, and the standpipe positioning assembly also includes a standard square box fixed on the standpipe positioning The standpipe positioning standard angler 11 on the upper surface of the box 10, the standard angler 11 for the standpipe positioning includes a fixed block and a rotating block each having a hinged end and an opening and closing end, and the hinged ends of the fixed block and the rotating block can be The hinge is hinged and a rotation angle positioning pin for positioning the rotation angle is provided at the hinge, and several installation holes are arranged on the fixed block and the rotation block according to the same spacing and aperture array as the installation holes on the three-dimensional installation platform. The opening and closing end of the fixed block of the standard angler 11 for standpipe positioning is arranged forward and fixed on the upper surface of the standard square box 10 for standpipe positioning horizontally by bolts, and the upper surface of the rotating block of the standard angler 11 for standpipe positioning is The middle part is fixedly provided with a standpipe positioning round table 12 upwards, the diameter of the standpipe positioning round table 12 matches the outer diameter of the lower end of the standpipe, and a standpipe positioning column 13 matching the inner diameter of the standpipe is arranged on the same axis at the axis of the standpipe positioning round table , the upper end of the standpipe positioning column 13 is movably matched with a disc-shaped standpipe pressing and fixing block 14 for pressing the standpipe after positioning; The column is screwed into a threaded hole at the top axis of the standpipe positioning column, so as to realize the compression of the standpipe clamping block to the positioned standpipe by screwing the threaded column, the structure is simple and the compression operation Convenient.

The flat fork shaft positioning assembly includes two flat fork shaft positioning and supporting angle irons 15 with an overall right-angled trapezoidal frame structure, and each side of the flat fork shaft positioning and supporting angle irons 15 is consistent with the installation holes on the three-dimensional installation platform. There are a number of installation holes arranged in the spacing and aperture array, the lower end of the flat fork shaft positioning support angle iron 15 is fixed on the middle of the three-dimensional installation platform by bolts and arranged opposite to the left and right; the hypotenuse of the flat fork shaft positioning support angle iron 15 is arranged backward and the inner surface is fixed A flat fork shaft positioning block 16 extending forward is provided, the distance between the two flat fork shaft positioning blocks 16 matches the width of the left and right sides of the engine suspension mounting plate, and the front upper ends of the two flat fork shaft positioning blocks 16 are provided with a flat fork shaft The positioning groove is also used to realize the positioning of the two ends of the flat fork shaft.

In this way, when in use, first adjust the angle of the standpipe positioning standard angler to the required angle, and then insert the standpipe into the standpipe positioning column so that the lower end and the standpipe positioning round table are abutted and supported to realize the standpipe Then the upper end of the standpipe can be completely fixed by pressing the standpipe compression fixing block; then the engine suspension mounting plate at the rear of the front half of the frame is dropped between the two flat fork shaft positioning support angle irons , and make the left and right sides of the engine suspension mounting plate expose the end of the flat fork shaft fall into the flat fork shaft positioning groove on the flat fork shaft positioning block to realize the positioning of the two ends of the flat fork shaft. In this way, the positioning and clamping of the front half body of the vehicle frame is realized with a simple structure by means of three-point positioning. The reliability of subsequent welding is guaranteed, the mutual position accuracy of each component is reliable, the welding operation is convenient and fast, and the cost is saved. At the same time, due to the use of standard square boxes, supporting angle irons, standard anglers, three-dimensional installation platforms and other non-standard positioning components to achieve connection and cooperation, each positioning structure can be flexibly and conveniently adjusted and installed according to needs, making it very It is suitable for use when trial production of samples needs to adjust the position of local components of each component, which greatly saves the cost of research and development. At the same time, the positioning support angle iron of the flat fork shaft can also facilitate the subsequent installation of the components for positioning the rear beam tube and its upper accessories, which is beneficial to saving space and simplifying costs.

Wherein, the positioning welding fixture structure at the front of the rear beam tube includes a positioning assembly at the front of the rear upper beam tube, a positioning assembly at the front support of the fuel tank, a positioning assembly at the seat cushion bracket, and a positioning assembly at the front of the rear lower beam tube;

The positioning assembly for the front part of the rear upper beam tube includes two positioning and supporting angle irons for the front part of the rear upper beam tube in a right-angled trapezoidal frame structure. The installation holes on the installation platform are arranged with a number of installation holes at the same spacing and aperture array, and the lower end of the positioning support angle iron at the front of the rear upper beam tube is fixed on the middle part of the three-dimensional installation platform 1 by bolts and is set opposite to the left and right (in specific implementation, the rear The positioning support angle iron at the front of the upper beam tube and the aforementioned flat fork shaft positioning support angle iron 15 are the same component, so as to use space more efficiently and skillfully, save components and reduce costs); the front positioning support angle iron of the rear upper beam tube is oblique The edge is arranged backward and the front side is fixedly connected with a rear upper beam tube front positioning standard angler 17, and the rear upper beam tube front positioning standard angler 17 includes a fixed block and a hinged end and an opening and closing end respectively. The rotating block, the hinged ends of the fixed block and the rotating block can be rotatably hinged and are provided with a rotating angle positioning pin for realizing the positioning of the rotating angle at the hinge. A number of installation holes are arranged in an array of consistent spacing and apertures. The fixed blocks of the standard angler 17 are arranged vertically and the opening and closing ends are fixed downwards and horizontally fixed on the front of the rear upper beam tube by bolts. The front side of the supporting angle iron; the rotating block of the standard angler 17 for positioning the front of the two rear upper beam tubes is horizontally fixedly connected with a horizontal connecting block 18, and the upper surface of the horizontal connecting block 18 corresponds to the front positions of the two rear upper beam tubes Two bosses 19 for positioning the front part of the rear upper beam tube are provided, and the inner side of the boss 19 for positioning the front part of the rear upper beam tube is provided with a rear upper beam for fitting with the outer and lower sides of the front part of the rear upper beam tube to realize positioning Positioning steps at the front of the tube;

The fuel tank front bracket positioning assembly includes a fuel tank front bracket positioning part formed on the upper surface of the transverse connection block between the two rear upper beam tube front positioning bosses 19 and extending forward, and the fuel tank front bracket positioning The upper surface of the fuel tank front bracket is provided with a positioning boss 20. The upper surface of the fuel tank front bracket positioning boss 20 is used to fit the lower surface of the fuel tank front bracket middle part to realize positioning. The fuel tank front bracket positioning boss 20 corresponds to the front of the fuel tank. The mounting hole of the bracket is provided with the positioning hole of the front bracket of the fuel tank and the positioning pin 21 of the front bracket of the fuel tank, and is used to realize the fixing after the positioning of the front bracket of the fuel tank;

The seat cushion bracket positioning assembly includes a seat cushion bracket positioning part formed on the upper surface of the transverse connecting block between the front positioning bosses 19 of the two rear upper beam tubes and extending backward. The surface is provided with two upward seat cushion bracket positioning columns 22, and the upper ends of the two seat cushion bracket positioning columns 22 are provided with a seat cushion bracket positioning round platform for inserting into the two mounting holes on the seat cushion bracket for positioning;

The front positioning assembly of the rear lower beam tube includes two rear lower beam tube front positioning support angle irons 23 with a right-angled trapezoidal frame structure, and each side of the rear lower beam tube front positioning support angle iron 23 is in accordance with A number of installation holes are arranged in the same spacing and aperture array as the installation holes on the three-dimensional installation platform. The lower end of the positioning support angle iron 23 at the front of the rear lower beam tube is fixed on the middle and rear part of the three-dimensional installation platform by bolts and is arranged opposite to the left and right; The positioning support angle iron 23 at the front of the tube is arranged backwards and the front side is fixedly connected with a rear lower beam tube front positioning standard angler 24, and the rear lower beam tube front positioning standard angler 24 includes a hinged joint A fixed block and a rotating block at one end and an opening and closing end, the hinged ends of the fixed block and the rotating block can be rotatably hinged and a rotation angle positioning pin for realizing the positioning of the rotation angle is arranged at the hinge, and the fixed block and the rotating block are all according to A number of installation holes are arranged in the same spacing and aperture array as the installation holes on the three-dimensional installation platform, and the fixed blocks of the standard angler 24 are arranged vertically for the front part of the rear lower beam tube, and the opening and closing ends are downward and horizontal to the bolts. It is fixed on the front side of the positioning support angle iron 23 at the front of the rear lower beam tube; a connecting block for positioning the front part of the rear lower beam tube is fixedly connected horizontally between the rotating blocks of the standard angler 24 for positioning the front part of the rear lower beam tube 25. The upper surface of the connecting block 25 for positioning the front part of the rear lower beam tube is provided with two bosses 26 for positioning the front part of the rear lower beam tube corresponding to the front positions of the two rear lower beam tubes. The platform 26 is provided with two positioning slots for positioning the front part of the rear lower beam tube for snapping in the front part of the rear lower beam tube.

In this way, when in use, first adjust the opening angle of the front positioning standard angler of the rear upper beam tube so that the direction of the rotating block is parallel to the rear upper beam tube, and then make the front ends of the two rear upper beam tubes in the center of the positioned main beam tube. The installation position of the rear part is fit and positioned, and then the front section of the rear upper beam tube falls into the two positioning steps at the front of the rear upper beam tube to realize the positioning of the front section of the rear upper beam tube; the middle part of the front bracket of the fuel tank is pasted Fit it to the positioning boss of the front support of the fuel tank, attach the feet at both ends to the corresponding installation positions on the rear upper beam tube to realize positioning, and then insert the pin into the installation hole of the front support of the fuel tank and the positioning hole of the front support of the fuel tank to realize the positioning of the front support of the fuel tank Then, insert the two mounting holes on the seat cushion bracket into the positioning round table at the upper end of the positioning column of the seat cushion bracket, and make the legs at both ends of the seat cushion support fit to the corresponding installation positions on the rear upper beam tube to achieve alignment. Positioning of the seat cushion bracket; then adjust the opening angle of the front positioning standard angler of the rear lower beam tube so that its rotating block is parallel to the rear lower beam tube, and then align the front end of the rear lower beam tube with the positioned engine suspension mounting plate The upper corresponding installation position fits together, and the front of the rear lower beam tube falls into the corresponding front positioning groove of the rear lower beam tube to realize the positioning of the front part of the rear lower beam tube. In this way, the positioning of the front section of the rear beam tube and its auxiliary components can be realized, and the welding torch can be used to realize the positioning between the rear upper beam tube, the rear lower beam tube and the front half of the frame, as well as the front bracket and seat of the fuel tank. Welded fixation between pad bracket and rear upper beam tube. The mutual position accuracy of each component is reliable and the welding operation is convenient and quick, which saves the cost. At the same time, due to the use of supporting angle irons, standard anglers, three-dimensional installation platforms and other non-standard positioning components to achieve connection and cooperation, each positioning structure can be flexibly and conveniently adjusted and installed according to needs, making it very suitable for testing It is used when the sample trial production needs to adjust the local component position of each component, which greatly saves the research and development cost. At the same time, some of the non-standard positioning components can realize the positioning of multiple components at the same time, and the structural arrangement is ingenious and ensures the accuracy of mutual positions.

Wherein, the rear beam tube rear positioning welding fixture structure includes a rear lower beam tube rear positioning assembly, a rear shock absorber shaft and a rear shock absorber shaft lug positioning assembly, a fuel tank rear bracket positioning assembly, and a vehicle body cover lug positioning assembly ;

The positioning assembly at the rear of the rear lower beam tube includes two positioning support angle irons at the rear of the rear lower beam tube in a right-angled trapezoidal frame structure. The installation holes on the installation platform are arranged in a consistent spacing and aperture array with several installation holes, and the lower end of the positioning support angle iron at the rear of the rear lower beam tube is fixed to the middle and rear of the three-dimensional installation platform by bolts and is set opposite to the left and right (in specific implementation, the above-mentioned The positioning support angle iron at the rear of the rear lower beam tube and the aforementioned positioning support angle iron 23 at the front of the rear lower beam tube are the same component, so as to use space more efficiently and skillfully, save components and reduce costs); the rear positioning of the rear lower beam tube The hypotenuse of the supporting angle iron is arranged backwards, and the upper position of the inner side surface is fixedly connected with a rear lower beam tube rear positioning block 27, and the rear lower beam tube rear positioning block 27 is provided with a hole for the rear lower beam tube to embed. Locating slots at the rear of the rear lower beam tube;

The rear shock absorber shaft and the rear shock absorber shaft lug positioning assembly include two rear shock absorber shaft positioning blocks 28 respectively fixed on the front side of the upper part of the positioning support angle iron at the rear of the two rear lower beam tubes. The front end of the block 28 bends and extends inwardly and forwardly, and a rear shock absorber shaft positioning groove is provided on the upper side of the front end to realize the positioning of the rear shock absorber shaft and the rear shock absorber shaft lug;

The vehicle body cover lug positioning assembly includes two vehicle body cover lug positioning components respectively fixed on the inner side of the upper part of the positioning support angle iron at the rear of the two rear lower beam tubes above the positioning block of the rear shock absorber shaft. Block 29, the positioning part of the lug of the vehicle body cover. The lower surface of the positioning part corresponds to the installation hole on the body cover to be provided with the positioning bolt hole of the support lug of the vehicle body cover. Clamp;

The fuel tank rear bracket positioning assembly includes two left and right symmetrical arrangements and an overall L-shaped frame structure for the fuel tank rear bracket positioning support angle iron 30, and each side of the two fuel tank rear bracket positioning support angle irons 30 is in accordance with the three-dimensional installation platform. The mounting holes are arranged in an array of consistent spacing and apertures with a number of mounting holes, which are respectively arranged at the positions in front of the positioning support angle irons at the rear of the two rear lower beam tubes (in specific implementation, the lower surface of the positioning support angle irons 30 of the rear support of the fuel tank is close to Bolts are fixed on the upper surface of the positioning support angle iron at the front of the rear upper beam tube to use space more efficiently and skillfully, save components and reduce costs); two fuel tank rear bracket positioning support angle irons 30 are fixed on the inner surface of a fuel tank rear Bracket positioning block 31, the fuel tank rear bracket positioning block 31 has a fuel tank rear bracket positioning part extending backward and upwards and the lower surface is used for fitting and positioning the upper surface of the fuel tank rear bracket. The lower surface of the fuel tank rear bracket positioning part corresponds to the fuel tank rear bracket. The mounting holes are provided with positioning bolt holes for the rear support of the fuel tank, and the positioning bolt holes for the rear support of the fuel tank are used for positioning and clamping the rear support of the fuel tank by screwing in the bolts.

In this way, when in use, the rear part of the rear lower beam tube that has been positioned at the front is first embedded in the positioning groove at the rear part of the rear lower beam tube to realize the positioning of the rear lower beam tube; then the rear shock absorbing shaft is inserted into the two rear In the rear shock absorber shaft hole of the shock absorber lug, adjust the left and right position of the rear shock absorber lug on the rear shock absorber shaft so that the lower end of the rear shock absorber lug fits to the corresponding installation position on the rear upper beam tube, And make both ends of the rear shock absorbing shaft fall into the positioning groove of the rear shock absorbing shaft, and realize the positioning of the rear shock absorbing shaft and the rear shock absorbing shaft lug at the same time; Corresponding to the installation position on the rear shock absorber shaft, the upper surface of the rear end and the lower surface of the positioning part of the lug of the car body cover are fitted together, and the bolts are screwed in to realize the positioning and locking of the lug of the car body cover; the rear end of the fuel tank rear support Fit with the corresponding installation position on the rear shock absorber shaft, and make the upper surface of the front end fit with the lower surface of the positioning part of the rear support of the fuel tank, and then screw in the bolts to realize the positioning and locking of the rear support of the fuel tank. In this way, the positioning of the rear section of the back beam tube and the auxiliary components on it is realized, and the welding and fixing of the auxiliary components on it can be realized at one time by using a welding torch. The mutual position accuracy of each component is reliable and the welding operation is convenient and quick, which saves the cost. At the same time, due to the use of supporting angle irons, standard anglers, three-dimensional installation platforms and other non-standard positioning components to achieve connection and cooperation, each positioning structure can be flexibly and conveniently adjusted and installed according to needs, making it very suitable for testing It is used when the sample trial production needs to adjust the local component position of each component, which greatly saves the research and development cost. At the same time, some of the non-standard positioning components can realize the positioning of multiple components at the same time, and the structural arrangement is ingenious and ensures the accuracy of mutual positions.

Wherein, the positioning welding fixture structure of the tail of the rear beam tube includes a rear upper beam tube positioning assembly, a seat cushion lock bracket positioning assembly and a tail cover lug positioning assembly;

The positioning assembly at the rear of the rear upper beam tube includes a standard square box 32 for positioning the rear of the rear upper beam tube with a rectangular body structure, and each side of the standard square box 32 for positioning the rear upper beam tube is according A number of installation holes are arranged at the same spacing and aperture array as the installation holes on the three-dimensional installation platform. The rear upper beam tube is positioned at the rear of the three-dimensional installation platform 1 with a standard square box 32 by bolts. The tube rear positioning assembly also includes a rear upper beam tube rear positioning block 33 that is horizontally fixed on the upper part of the front side surface of the standard square box 32 for positioning the rear upper beam tube rear, and the rear upper beam tube rear positioning block 33. The left and right sides of the upper surface of the front part correspondingly protrude upwards to form a positioning boss 34 at the rear of the rear upper beam tube. Positioning groove at the rear of the rear upper beam tube;

The seat cushion lock bracket positioning assembly includes two seat cushion lock support positioning columns 35 symmetrically arranged on the upper end surface of the standard square box at the rear of the rear upper beam tube, and the seat cushion lock support positioning columns 35 are provided with a seat cushion lock The bracket positioning boss is used to insert into the two mounting holes at the end of the seat cushion lock bracket to achieve positioning;

The tail cover lug positioning assembly includes two tail cover lug positioning angle irons 36 symmetrically arranged on the upper ends of the left and right sides of the standard square box 32 for positioning the rear upper beam tube rear portion. It is an L-shaped frame structure and several installation holes are arranged on each side according to the same spacing and aperture array as the installation holes on the three-dimensional installation platform. After the bolt is fixed, the rear part of the upper beam tube is positioned on the front side of the standard square box 32, and the inner side of the tail cover lug positioning angle iron 36 is convexly provided with a tail cover lug positioning block 37, which corresponds to the tail cover lug positioning block 37. The mounting holes of the cover lugs are provided with threaded through holes, and the bolts are screwed in to realize the positioning and clamping of the tail cover lugs.

In this way, when in use, the rear of the rear upper beam tube whose front portion has been positioned is first dropped into the corresponding rear upper beam tube rear positioning groove to realize the positioning of the rear upper beam tube rear portion; then the seat cushion lock The lower end of the bracket is attached to the corresponding installation position on the rear upper beam tube, and the two mounting holes at the rear upper end of the seat cushion lock bracket are inserted into the positioning bosses at the upper end of the positioning column of the seat cushion lock bracket to realize the alignment of the seat cushion lock bracket. Then fit the inner ends of the two tail cover lugs to the corresponding installation positions on the seat cushion lock bracket after positioning, and make the outer ends of the two tail cover lugs fit with the positioning block of the tail cover lugs, and then Bolts are screwed into the mounting holes on the lugs of the tail cover and the threaded through holes on the positioning block of the lugs of the tail cover to realize the positioning and locking of the two lugs of the tail cover. In this way, the positioning of the tail of the rear upper beam tube and the auxiliary components on it is realized, and the welding and fixing of the upper auxiliary components can be realized at one time by using a welding torch. The mutual position accuracy of each component is reliable and the welding operation is convenient and quick, which saves the cost. At the same time, due to the use of supporting angle irons, standard square boxes, three-dimensional installation platforms and other non-standard positioning components to achieve connection and cooperation, each positioning structure can be flexibly and conveniently adjusted and installed according to needs, making it very suitable for testing It is used when the sample trial production needs to adjust the local component position of each component, which greatly saves the research and development cost. At the same time, some of the non-standard positioning components can realize the positioning of multiple components at the same time, and the structural arrangement is ingenious and ensures the accuracy of mutual positions.

Claims (4)

1. a kind of beam bending bicycle sample welding clamp of vehicle frame, it is characterised in that the weld jig includes upper surface and the week side of boss table Face is disposed with the three-dimensional mounting platform of some installing holes according to constant spacing array, and is arranged on three-dimensional mounting platform Vehicle frame proterosoma positioning fixture structure, back rest pipe front portion positioning welding clamp structure, back rest pipe rear portion positioning welding clamp structure With back rest pipe afterbody positioning welding clamp structure；The vehicle frame proterosoma positioning fixture structure is used to realize to vehicle frame proterosoma Positioning；The back rest pipe front portion positioning welding clamp structure is used to realize before anterior to rear lower beam pipe, rear upper beam pipe front portion, fuel tank The positioning of support and cushion rack；The back rest pipe rear portion positioning welding clamp structure be used for realize to rear lower beam pipe rear portion, after The positioning of elastic axis journal stirrup, rear elastic axis, fuel tank after-poppet and car body covering journal stirrup；The back rest pipe afterbody positioning welding folder Lamps structure is used to realize the positioning to rear upper beam pipe rear portion, seat cushion lock support and hood journal stirrup；

The vehicle frame proterosoma positioning fixture structure includes standpipe positioning component and bottom fork axis positioning component；

The standpipe positioning component includes the standpipe positioning standard square chest of the rectangular body structure of entirety, and the standpipe is positioned If with each side of standard square chest according to three-dimensional mounting platform on the consistent spacing of installing hole and array of apertures be disposed with Dry installing hole, standpipe positioning standard square chest sets by being bolted to three-dimensional mounting platform front Middle face and upwardly extending Put, the standpipe positioning component also includes a standpipe positioning standard angle for being fixed on standpipe positioning standard square chest upper surface Degree device, the standpipe positioning standard angle device includes each fixed block and rotation with a hinged end and a folding end The hinged end of block, fixed block and moving block is rotatably hinged and is provided with for realizing the rotation that rotational angle is positioned in hinged place Angle alignment pin, the fixed block with moving block according to three-dimensional mounting platform on the consistent spacing of installing hole and aperture Array is disposed with some installing holes, and the fixed block folding end of the standpipe positioning standard angle device is arranged forward and by bolt water It is flat to be fixed on standpipe positioning standard square chest upper surface, the standpipe positioning with the moving block upper surface middle part of standard angle device to On be fixedly installed standpipe positioning round table, the standpipe positioning round table diameter and the matching of lower riser end external diameter and standpipe positioning round table At axle center it is coaxial on be provided with standpipe locating dowel with the matching of standpipe internal diameter, standpipe locating dowel upper end clearance fit has disc For to position rear profile tube compress standpipe be fixed block；

The bottom fork axis positioning component includes the bottom fork axis positioning support angle bar of two entirety frame structure in a rectangular trapezoid, described On each side of bottom fork axis positioning support angle bar according to three-dimensional mounting platform on the consistent spacing of installing hole and array of apertures It is disposed with some installing holes, bottom fork axis positioning support angle bar lower end is by being bolted to three-dimensional mounting platform middle part and left and right is relative Arrange；Bottom fork axis positioning support angle bar hypotenuse is arranged backward and medial surface is fixedly installed the bottom fork axis locating piece for extending forward, Distance and electromotor hang the width matching of the installing plate left and right sides between two bottom fork axis locating pieces, before two bottom fork axis locating pieces Upper end is provided with bottom fork axis locating slot and for realizing the positioning to bottom fork axis two ends.

2. beam bending bicycle sample welding clamp of vehicle frame as claimed in claim 1, it is characterised in that the anterior positioning of the back rest pipe Weld jig structure include rear upper beam pipe front portion positioning component, fuel tank fore-stock positioning component, cushion rack positioning component and after Lower beam pipe front portion positioning component；

Rear upper beam pipe front portion positioning component includes the anterior positioning of rear upper beam pipe of two entirety frame structure in a rectangular trapezoid Support angle, on each side of rear upper beam pipe front portion positioning support angle bar according to three-dimensional mounting platform on installing hole one The spacing and array of apertures of cause is disposed with some installing holes, and rear upper beam pipe front portion positioning support angle bar lower end is by being bolted to three Tie up mounting platform middle part and left and right is oppositely arranged；Afterwards upper beam pipe front portion positioning support angle bar hypotenuse is arranged backward and leading flank is fixed Upper beam pipe front portion localization criteria protractor after being connected with one, the rear upper beam pipe front portion localization criteria protractor includes each tool The hinged end for having the fixed block and moving block at a hinged end and a folding end, fixed block and moving block be rotatably hinged and Hinged place be provided with for realize rotational angle position rotational angle alignment pin, on the fixed block and moving block according to The consistent spacing of installing hole on three-dimensional mounting platform and array of apertures are disposed with some installing holes, and the rear upper beam pipe is anterior fixed The fixed block of position standard angle device is vertically arranged and folding end is horizontally fixed on the anterior positioning of rear upper beam pipe downwards and by bolt Hold angle bar leading flank；One is laterally fixedly connected with after two laterally between the moving block of upper beam pipe front portion localization criteria protractor Contiguous block, the anterior positioning of upper beam pipe is with convex after upper beam pipe forward position is provided with two after lateral connection block upper surface correspondence two Platform, rear upper beam pipe front portion positioning boss medial surface is provided with realizes positioning for outer downside laminating anterior with rear upper beam pipe Afterwards upper beam pipe front portion positioning step；

The fuel tank fore-stock positioning component is included in the lateral connection block upper surface positioned at the anterior positioning of upper beam pipe after two With the fuel tank fore-stock location division of formation is extended between boss and forward, the fuel tank fore-stock location division upper surface is provided with one Individual fuel tank fore-stock positioning boss, fuel tank fore-stock positioning boss upper surface is used for and the laminating of fuel tank fore-stock middle lower surface is real Now position, on the fuel tank fore-stock positioning boss installing hole of correspondence fuel tank fore-stock be provided with fuel tank fore-stock location hole and Fuel tank fore-stock fastening screw simultaneously is used to realize the fixation to after fuel tank fore-stock positioning；

The cushion rack positioning component is included in the lateral connection block upper surface and uses positioned at the anterior positioning of upper beam pipe after two Between the boss and cushion rack location division that extends rearwardly to form, cushion rack location division upper surface is provided with two seats upwards Pad support locating dowel, two cushion rack locating dowel upper ends are provided with realize in two installing holes on cushion rack fixed for inserting The cushion rack positioning round table of position；

Rear lower beam pipe front portion positioning component includes the anterior positioning of rear lower beam pipe of two entirety frame structure in a rectangular trapezoid Support angle, on each side of rear lower beam pipe front portion positioning support angle bar according to three-dimensional mounting platform on installing hole one The spacing and array of apertures of cause is disposed with some installing holes, and rear lower beam pipe front portion positioning support angle bar lower end is by being bolted to three Tie up mounting platform postmedian and left and right is oppositely arranged；Afterwards lower beam pipe front portion positioning support angle bar hypotenuse is arranged backward and leading flank is solid Surely lower beam pipe front portion localization criteria protractor after being connected with, the rear lower beam pipe front portion localization criteria protractor includes respective The hinged end of fixed block and moving block with a hinged end and a folding end, fixed block and moving block be rotatably hinged and Hinged place be provided with for realize rotational angle position rotational angle alignment pin, on the fixed block and moving block according to The spacing and array of apertures consistent with the installing hole on three-dimensional mounting platform is disposed with some installing holes, and the rear lower beam pipe is anterior The fixed block of positioning standard angle device is vertically arranged and folding end is downward and it is anterior fixed to be horizontally fixed on rear lower beam pipe by bolt Position support angle leading flank；One is laterally fixedly connected with after two between the moving block of lower beam pipe front portion positioning standard angle device Individual rear lower beam pipe front portion positioning contiguous block, the anterior positioning of rear lower beam pipe uses lower beam pipe after contiguous block upper surface correspondence two anterior Position be provided with two after lower beam pipe front portion positioning boss, be provided with the positioning boss of rear lower beam pipe front portion two confessions it is rear under Beam pipe forward position snaps in the rear lower beam pipe front portion locating slot for realizing positioning.

3. beam bending bicycle sample welding clamp of vehicle frame as claimed in claim 1, it is characterised in that the back rest pipe rear portion positioning Weld jig structure includes being propped up after rear lower beam pipe rear portion positioning component, rear elastic axis and rear elastic axis journal stirrup positioning component, fuel tank Frame positioning component and car body covering journal stirrup positioning component；

The rear lower beam pipe rear portion positioning component includes the rear lower beam pipe rear portion positioning of two entirety frame structure in a rectangular trapezoid Support angle, on each side of the rear lower beam pipe rear portion positioning support angle bar according to three-dimensional mounting platform on installing hole one The spacing and array of apertures of cause is disposed with some installing holes, and rear lower beam pipe rear portion positioning support angle bar lower end is by being bolted to three Tie up mounting platform postmedian and left and right is oppositely arranged；Afterwards lower beam pipe rear portion positioning support angle bar hypotenuse is arranged backward and on medial surface Portion position be fixedly connected with one after lower beam pipe rear portion locating piece, be provided with for after confession on the rear lower beam pipe rear portion locating piece Lower beam pipe rear portion is embedded in the rear lower beam pipe rear portion locating slot of positioning；

Lower beam pipe rear portion positions after the rear elastic axis and rear elastic axis journal stirrup positioning component are separately fixed at two including two The rear elastic axis locating piece of support angle top leading flank, the inside front bending extension and in front end in rear elastic axis locating piece front end Upper side be provided with rear elastic axis locating slot for realize to rear elastic axis and the positioning of rear elastic axis journal stirrup；

The car body covering journal stirrup positioning component be separately fixed at two including two after lower beam pipe rear portion positioning support angle bar Top is located at the car body covering journal stirrup locating piece of the medial surface of position on rear elastic axis locating piece, car body covering tumour of external auditory meatus There is position block a car body covering that forward extension and lower surface are used to supply car body covering journal stirrup lower surface to fit positioning to prop up Ear location division, the installing hole on car body covering journal stirrup positioning lower surface correspondence car body covering is provided with car body covering Ear positioning bolt hole, car body covering journal stirrup positioning bolt hole is used to screw in the positioning realized to car body covering journal stirrup by bolt And clamping；

The fuel tank after-poppet positioning component include two be symmetrically arranged and overall L-shaped frame structure fuel tank after-poppet Positioning supports angle bar, two fuel tank after-poppets positioning support on each side of angle bar according to three-dimensional mounting platform on installing hole Consistent spacing and array of apertures is disposed with some installing holes and lower beam pipe rear portion positioning support angle bar after being respectively arranged at two Anterior position；Two fuel tank after-poppet positioning support angle bar medial surface to be respectively fixedly installed a fuel tank after-poppet locating piece, oil There is case after-poppet locating piece one to extend rearwardly and upwardly and lower surface is used for the oil that the laminating of oil feeding reservoirs after-poppet upper surface is positioned Case after-poppet location division, the installing hole on fuel tank after-poppet positioning lower surface correspondence fuel tank after-poppet is provided with after fuel tank and props up Frame positioning bolt hole, fuel tank after-poppet positioning bolt hole is used to be screwed in by bolt realizes the positioning to fuel tank after-poppet and clamping.

4. beam bending bicycle sample welding clamp of vehicle frame as claimed in claim 1, it is characterised in that the back rest pipe afterbody positioning Weld jig structure includes rear upper beam pipe rear portion positioning component, cushion lock support positioning component and hood journal stirrup positioning component；

The rear upper beam pipe rear portion positioning component includes the rear upper beam pipe rear portion positioning standard of the rectangular body structure of entirety Square chest, the rear upper beam pipe rear portion positioning with each side of standard square chest according to consistent with the installing hole on three-dimensional mounting platform Spacing and array of apertures be disposed with some installing holes, rear upper beam pipe rear portion positioning standard square chest is by being bolted to three-dimensional peace Assembling platform rear end medium position, the rear upper beam pipe rear portion positioning component is also secured transverse to rear upper beam pipe rear portion including one to be determined Position upper beam pipe rear portion locating piece after of standard square chest front side surface upper position, before the rear upper beam pipe rear portion locating piece Portion upper surface location left and right sides correspondence raises up and is formed with rear upper beam pipe rear portion positioning boss, rear upper beam pipe rear portion convex The rear upper beam pipe rear portion locating slot for being embedded in positioning for rear upper beam pipe rear portion is provided with platform；

The cushion lock support positioning component includes being symmetrical set in rear upper beam pipe rear portion positioning standard square chest upper surface Two seat cushion lock support locating dowels, seat cushion lock support locating dowel upper end is provided with seat cushion lock support positioning boss and for abutment Positioning is realized in two installing holes insertion of pad lock support afterbody；

The hood journal stirrup positioning component includes being symmetrical set in rear upper beam pipe rear portion positioning standard square chest left and right side Two hood journal stirrup positioning angle bars of upper end position, hood journal stirrup positioning angle bar integrally on L-shaped frame structure and each side According to three-dimensional mounting platform on the consistent spacing of installing hole and array of apertures be disposed with some installing holes, hood journal stirrup positioning Angle bar bottom have one backward extend laterally section and after fixing by bolt on front side of upper beam pipe rear portion positioning standard square chest, tail Evagination is provided with hood journal stirrup locating piece on cover journal stirrup positioning angle bar medial surface, correspondence hood journal stirrup on hood journal stirrup locating piece Installing hole is provided with tapped through hole and screws in by bolt realizes the positioning to hood journal stirrup and clamping.