CN105149845B - Clamp structure for fixed-position welding of rear portion of rear beam pipe of frame of cub-type motorcycle sample - Google Patents

Abstract

The invention discloses a positioning welding fixture structure of the rear part of the rear beam tube of the frame for the curved beam vehicle sample, which is characterized in that it comprises a rear lower beam tube rear positioning assembly for realizing the positioning of the rear part of the rear lower beam tube, The rear shock absorber shaft and the rear shock absorber shaft lug positioning assembly for realizing the positioning of the rear shock absorber shaft and the rear shock absorber shaft lug, the fuel tank rear support positioning assembly for realizing the positioning of the fuel tank rear support, and the vehicle body cover part support positioning assembly Lug positioning body panel lug positioning assembly. The invention has the advantages of simple structure, reliable positioning, simplified welding and assembly process, simple operation, low cost, convenient trial production and adjustment of bending beam car samples, and the like.

Description

Fixture structure for positional welding of the rear part of the rear beam tube of the frame for the sample of the curved beam vehicle

technical field

The invention relates to the field of motorcycle frame processing, in particular to a positioning welding fixture structure for the rear part of the rear beam tube of the frame for bending 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 classes. 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 position of the two rear upper beam tubes also needs to be installed with a rear shock absorbing shaft, and the rear shock absorbing shaft runs through the two rear shock absorbing shaft lugs that are fixed on the upward protrusion and connected to the upper surface of the rear part of the two rear upper beam tubes. On the top, 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. A fuel tank rear bracket, and a car body cover lug is welded and fixed successively; the tail ends of the two rear upper beam tubes are also welded and fixed upwards, and a seat cushion lock bracket with an overall inverted U-shaped frame structure is welded and fixed, and the seat cushion lock bracket is left and right One tail cover lug is fixed by welding on each side.

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.

In order to solve the above-mentioned problems, the applicant considered designing a frame welding fixture for the bending beam car sample, so that it can simultaneously complete the clamping and positioning of the front half of the frame and the rear beam tube structure and the accessories on it, and then it can be used The frame is obtained by one-time welding to simplify the process and reduce the cost. However, in the welding fixture, how to design the fixture structure for positioning the rear part of the rear beam tube of the frame and its upper accessories, so that it has the characteristics of simple structure, reliable positioning, low cost, and favorable adjustment, has become a problem to be considered and solved .

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 bending beam sample vehicle with simple structure, reliable positioning, simplified process, simple operation, low cost, and convenient trial production and adjustment. The positioning welding fixture structure at the rear of the beam tube of the frame.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A frame rear beam tube rear positioning welding fixture structure for curved beam vehicle samples, characterized in that it includes a rear lower beam tube rear positioning assembly for realizing rear lower beam tube rear positioning, and a rear lower beam tube rear positioning assembly for realizing rear shock absorption The rear shock absorber shaft and the rear shock absorber shaft lug positioning assembly for positioning the axle and the rear shock absorbing shaft lug, the fuel tank rear bracket positioning assembly for positioning the fuel tank rear bracket, and the vehicle body cover body lug positioning Body cover lug positioning assembly.

In this way, the welding fixture structure can realize the positioning and installation of the auxiliary components at the rear position of the rear lower beam tube and the middle part of the rear upper beam tube for the sample frame of the curved beam vehicle. Welding between components 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 rear lower beam tube rear positioning assembly includes two rear lower beam tube rear positioning support angle irons with a right-angled trapezoidal frame structure as a whole, and each side of the rear lower beam tube rear positioning support angle irons A number of installation holes are arranged according to 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 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 lower beam The positioning support angle iron hypotenuse at the rear of the tube is arranged backwards, and a positioning block at the rear of the rear lower beam tube is fixedly connected to the upper position on the inner surface, and the positioning block at the rear of the rear lower beam tube is provided with a The rear part of the rear lower beam tube is embedded in the positioning groove.

This is not only convenient for clamping and positioning, but also more convenient for its flexible adjustment to meet the requirements of sample adjustment.

As an optimization, 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. The front end of the shaft positioning block bends and extends inwardly and forwardly, and a rear shock absorber shaft positioning groove is arranged on the upper side of the front end to realize the positioning of the rear shock absorber shaft and the rear shock absorber lug.

This is not only convenient for clamping and positioning, but also more convenient for its flexible adjustment to meet the requirements of sample adjustment.

As an optimization, the lug positioning assembly of the vehicle body cover includes two vehicle body cover 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 and located above the positioning block of the rear shock absorbing shaft Lug positioning block, the lug positioning block of the car body cover has a car body cover lug positioning part that extends forward and the lower surface is used for the lower surface of the car body cover lug to fit and position, the car body cover support The lower surface of the lug positioning part corresponds to the installation hole on the body cover part, and the car body cover part lug positioning bolt hole is provided. The car body cover part support lug positioning bolt hole is used to realize the positioning of the car body cover part lug by screwing in the bolt. and clamped.

This is not only convenient for clamping and positioning, but also more convenient for its flexible adjustment to meet the requirements of sample adjustment.

As an optimization, the fuel tank rear bracket positioning assembly includes two left and right symmetrically arranged fuel tank rear bracket positioning support angle irons with an overall L-shaped frame structure. There are a number of mounting holes arranged in an array with the same spacing and aperture on the upper part of the mounting holes, which are respectively set in front of the positioning support angle irons at the rear of the two rear lower beam tubes; one is fixed on the inner side of the positioning support angle irons of the two fuel tank rear brackets. Fuel tank rear bracket positioning block, the fuel tank rear bracket positioning block has a fuel tank rear bracket positioning part extending backward and upwards and the lower surface is used for 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.

This is not only convenient for clamping and positioning, but also more convenient for its flexible adjustment to meet the requirements of sample adjustment.

When the above positioning welding fixture structure is used, the rear part of the rear lower beam tube that has been positioned in the front part 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 In the rear shock absorber holes of the two rear shock absorber lugs, adjust the left and right positions of the rear shock absorber lugs on the rear shock absorber shaft so that the lower end of the rear shock absorber lugs fits on the rear upper beam tube correspondingly. Install the position, and make both ends of the rear shock absorber fall into the positioning groove of the rear shock absorber, and at the same time realize the positioning of the rear shock absorber and the rear shock absorber lug; Attached to the corresponding 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 positioning part of the car body cover are attached and screwed in by bolts to realize the positioning and locking of the lug of the car body cover; The rear end of the bracket fits with the corresponding installation position on the rear shock absorber shaft, and makes the upper surface of the front end fit with the lower surface of the positioning part of the fuel tank rear bracket, and then the bolts are screwed in to realize the positioning and locking of the fuel tank rear bracket. 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.

To sum up, the present invention has the advantages of simple structure, reliable positioning, simplification of welding assembly process, 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 a frame welding jig for a bending beam car sample that adopts the structure of the present invention.

FIG. 2 is a top view of the welding jig of FIG. 1 .

Fig. 3 is a side view of the welding jig in Fig. 1 when in use.

Fig. 4 is a top view of the welding jig in Fig. 1 when in use.

detailed description

The present invention will be further described in detail below in conjunction with a frame welding jig for a curved beam vehicle sample and the accompanying drawings that adopt the structure of the present invention. 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.

Optimum implementation mode: as shown in Figure 1-4, a frame welding fixture for bending beam car samples, the welding fixture includes a three-dimensional installation in which several mounting holes are arranged in arrays at fixed intervals on the upper surface and the peripheral side surface. Platform 1, and 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 arranged on the three-dimensional installation platform 1; the vehicle frame The front half body positioning jig structure is used to realize the positioning of the front half body of the vehicle frame; The positioning of the pad 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 cover Positioning of the lug 7; the positioning welding fixture structure at the tail of the back 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 tail cover lug 9.

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 a consistent spacing and aperture array, and the fixed block of the standard angler 17 is arranged vertically for the front part of the rear upper beam tube, and the opening and closing end is downward and fixed horizontally in front of the rear upper beam tube by bolts. The front side of the angle iron is positioned and supported; a horizontal connection block 18 is horizontally fixedly connected between the rotating blocks of the standard angler 17 for positioning the front of the two rear upper beam tubes, and the upper surface of the horizontal connection block 18 corresponds to two rear upper beam tubes The front position is provided with two bosses 19 for positioning the front part of the rear upper beam tube, and the inner surface of the boss 19 for positioning the front part of the rear upper beam tube is provided with a hole for fitting with the outer and lower side of the front part of the rear upper beam tube to realize positioning. Positioning steps at the front of the rear upper beam 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 and extending forward. 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 block of the standard angler 24 for the front part of the rear lower beam tube is arranged vertically and the opening and closing end is downward and leans against the bolt Horizontally fixed on the front side of the positioning support angle iron 23 at the front of the rear lower beam tube; between the rotating blocks of the standard angler 24 for positioning the front part of the two rear lower beam tubes, there is a connection for positioning the front part of the rear lower beam tube. Block 25, for the positioning of the front part of the rear lower beam tube. The boss 26 is provided with two positioning slots for the front part of the rear lower beam tube to snap into and realize 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.

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 Support positioning block 31, The fuel tank rear bracket positioning block 31 has a fuel tank rear bracket positioning part extending backward and upward, and the lower surface is used for positioning the upper surface of the fuel tank rear bracket. The lower surface of the fuel tank rear bracket positioning part corresponds to the installation hole on the fuel tank rear bracket. Positioning bolt holes of the rear support, the positioning bolt holes of the rear support of the fuel tank are used to realize the positioning and clamping of 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 beam bending bicycle sample vehicle frame back rest pipe rear portion positioning welding clamp structure, it is characterized in that, including for realize after lower beam pipe rear portion location rear lower beam pipe rear portion positioning component, for realize after elastic axis and rear elastic axis journal stirrup location rear elastic axis and rear elastic axis journal stirrup positioning component, for realize fuel tank after-poppet location fuel tank after-poppet positioning component and for realize car body covering journal stirrup location car body covering journal stirrup positioning component；

Described rear lower beam pipe rear portion positioning component includes the rear lower beam pipe rear portion positioning support angle bar of two entirety rectangular ladder-shaped frame structures, all being disposed with some installing holes according to the spacing consistent with the installing hole on three-dimensional mounting platform and array of apertures on each side of positioning support angle bar, described rear lower beam pipe rear portion, positioning support angle bar lower end, rear lower beam pipe rear portion is oppositely arranged by being bolted to three-dimensional mounting platform postmedian and left and right；Rear lower beam pipe rear portion positioning support angle bar hypotenuse arrange backward and medial surface upper position be fixedly connected with one after lower beam pipe rear portion locating piece, described rear lower beam pipe rear portion locating piece is provided with for for rear lower beam pipe rear portion embed location rear lower beam pipe rear portion locating slot.

2. beam bending bicycle sample vehicle frame back rest pipe rear portion positioning welding clamp structure as claimed in claim 1, it is characterized in that, described rear elastic axis and rear elastic axis journal stirrup positioning component include that two are separately fixed at the rear elastic axis locating piece of lower beam pipe rear portion positioning support angle bar top leading flank after two, rear elastic axis locating piece front end inside front bending extension and after front end upper side is provided with elastic axis locating slot for realizing rear elastic axis and the location of rear elastic axis journal stirrup.

3. beam bending bicycle sample vehicle frame back rest pipe rear portion positioning welding clamp structure as claimed in claim 2, it is characterized in that, described car body covering journal stirrup positioning component include two be separately fixed at two after positioning support angle bar top, lower beam pipe rear portion be positioned at the car body covering journal stirrup locating piece of the medial surface of position on rear elastic axis locating piece, car body covering journal stirrup locating piece has a car body covering journal stirrup location division that extension and lower surface position forward for supplying the laminating of car body covering journal stirrup lower surface, installing hole on the lower surface correspondence car body covering of car body covering journal stirrup location division is provided with car body covering journal stirrup positioning bolt hole, car body covering journal stirrup positioning bolt hole realizes the location to car body covering journal stirrup and clamping for screwing in by bolt.

4. beam bending bicycle sample vehicle frame back rest pipe rear portion positioning welding clamp structure as claimed in claim 2, it is characterized in that, described fuel tank after-poppet positioning component includes that two are symmetrically arranged and the fuel tank after-poppet location support angle bar of overall L-shaped frame structure, and two fuel tank after-poppets location support lower beam pipe rear portion positioning support angle bar anterior position after being all disposed with some installing holes according to the spacing consistent with the installing hole on three-dimensional mounting platform and array of apertures and be respectively arranged at two on each side of angle bar；Two fuel tank after-poppet location support angle bar medial surface and are respectively fixedly installed a fuel tank after-poppet locating piece, fuel tank after-poppet locating piece has a fuel tank after-poppet location division that extension and lower surface position rearwardly and upwardly for the laminating of oil feeding reservoirs after-poppet upper surface, installing hole on the lower surface correspondence fuel tank after-poppet of fuel tank after-poppet location division is provided with fuel tank after-poppet positioning bolt hole, and fuel tank after-poppet positioning bolt hole realizes the location to fuel tank after-poppet and clamping for screwing in by bolt.