CN105382435B - A kind of anterior segment structure processing method of scooter sample vehicle frame - Google Patents

Abstract

The invention discloses a method for processing the structure of the front section of a scooter sample frame, which is characterized in that firstly, a welding fixture is used to complete several joints of the head tube and the front end of the lower beam tube, the ignition switch lock bracket, the instrument case bracket and the direction lock block. Clamping and fixing between the two components, using welding torch to complete the welding and fixing between the above components, and then dismantling the positioning components used to realize the clamping and positioning of the ignition switch lock bracket and the instrument case bracket to avoid interference, and then in the welding fixture Install the positioning assembly used to realize the clamping and positioning of the front mask installation tube and the front mask installation lug, realize the clamping and positioning of the front mask installation tube and the front mask installation lug, and then use the welding torch to complete the front mask installation Welds between the tube and the head tube and between the front cowl mounting tube and the front cowling mounting lug. The invention can simplify the welding and assembling process, has the advantages of simple operation, low cost, convenient trial production and adjustment of the front section of the scooter sample, and the like.

Description

A method for processing the structure of the front section of the scooter sample frame

technical field

The invention relates to the field of motorcycle frame processing, in particular to a method for processing the front section structure of a scooter sample frame.

Background technique

A scooter is a vehicle between a motorcycle and a car, and it is a popular means of transportation. The shape and size of the scooter is similar to that of a motorcycle, the difference is that there is a recessed pedal between the head and the body seat for the driver's feet, and its transmission system generally adopts continuously variable speed, so there is no need to change gears when driving. Especially suitable for women's riding. Like motorcycles, during the research and development process of scooters, it is also necessary to develop and design sample products first, and conduct tests to ensure the reliability and practicability of the final product.

In a new scooter model LF-125-T, the main structure of the frame includes a cylindrical head tube located at the front end of the frame and inclined to the rear and upward. The left and right sides of the middle of the rear side of the head tube are fixed Connect a lower beam tube, the rear end of the lower beam tube extends downwards and then bends upward to form an overall U-shaped structure. The main structure of the frame also includes two upper beam tubes, and the front end of the upper beam tube is fixedly connected to the vertical To the rear side of the middle part of the section, the front section of the upper beam tube is set horizontally and the middle position of the upper beam tube is connected to the rear end of the lower beam tube. It is inserted and fixedly connected as a whole by the U-shaped tailpipe as a whole and forms the rear part of the vehicle frame.

The complete LF-125-T new scooter frame, on the basis of the main structure of the above frame, also needs to install an ignition switch lock bracket on the front side of the upper end of the head tube, and install an instrument case bracket on the rear side of the upper end of the head tube , the upper position of the pulling surface of the head tube is fixedly connected with a front mask installation pipe extending forward and downward, the front end of the front mask installation pipe is connected with a front mask installation lug, and the lower end of the front side of the head pipe is also fixedly provided with a direction lock block; the two upper The beam tubes are located at the rear side of the front section, and are connected horizontally from front to back in sequence. There is an overall U-shaped luggage front bracket and a luggage box lower bracket. A pedal bracket needs to be installed outside the middle of the lower beam tube. Two A U-shaped rear beam tube extending backward and downward needs to be connected horizontally between the lower ends of the rear part of the lower beam tube. A rear beam tube is fixed horizontally in the middle between the two arms of the rear beam tube. An engine suspension bracket is fixedly connected to the rear of each position; rear shock absorbing lugs set backward are also connected to the upward middle position of the rear of the two lower beam tubes, and the outer side of the joint between the rear end of the lower beam tube and the upper beam tube is also connected. There is an upper beam tube reinforcement plate fixedly connected, and a seat cushion lock bracket is fixed outwardly on the lower part of the outer side of the upper beam tube reinforcement plate; the middle position of the rear section of the upper beam tube is also fixedly connected with a trunk rear bracket, An upper beam tube is horizontally connected between the two upper beam tubes at the rear of the trunk rear bracket; a seat cushion rear bracket with the middle part protruding upward is also horizontally connected between the two arms at the middle of the tail tube, and the rear of the tail tube is at the There is also an upwardly protruding rear armrest lug fixedly connected to the left and right sides, and a tail cover installation lug is fixedly connected downward under the tail pipe where the rear armrest lug is located. Tail cap bracket extending from the upper rear.

For the above-mentioned frame structure, during the production of motorcycle R&D samples, it is usually divided into steps to sequentially complete the welding and fixing of each component in the frame main body and each accessory component thereon; and then weld and fix the components of the frame body in sequence. Like this, there are numerous working procedures, complicated operation, and the defects that the cost is too high. At the same time, because sample production often requires adjustments to the installation positions and installation angles of some local components, welding fixtures with fixed structures are used for each adjustment, which greatly increases the cost and restricts the expansion of sample research and development. Especially wherein in the front section of the vehicle frame, due to the many additional components and different positions, when welding is performed, the above-mentioned problems and defects are particularly prominent.

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 front part of the scooter sample frame 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. Segment structure processing method.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solution: when the solution involves orientation description, the state after installation is used as the orientation description reference.

A method for processing the structure of the front section of a scooter sample frame, which is characterized in that firstly, a welding fixture is used to complete the installation between the head tube and the front end of the lower beam tube, the ignition switch lock bracket, the instrument case bracket and the direction lock block. Clamp fixation, using a welding torch to complete the welding and fixing between the above components, and then remove the positioning components used to realize the clamping and positioning of the ignition switch lock bracket and the instrument case bracket to avoid interference, and then install them in the welding fixture for The positioning component that realizes the clamping and positioning of the front mask installation tube and the front mask installation lug, realizes the clamping and positioning of the front mask installation tube and the front mask installation lug, and then uses the welding torch to complete the alignment of the front mask installation tube and the front tube Welding between the front mask installation tube and the front mask installation lug; complete the welding and fixing process of the front section structure of the frame for the scooter sample.

In this way, the method can greatly improve the processing efficiency, avoid interference, conveniently and quickly realize the clamping and welding of each component of the front section of the scooter sample frame, and greatly improve the overall welding efficiency of the frame.

The welding fixture used in it includes a three-dimensional installation platform with a number of installation holes arranged in a fixed-space array on the upper surface and the peripheral surface, and a head tube positioning component for realizing the positioning of the head tube, and a bracket for locking the ignition switch. Ignition switch lock bracket positioning assembly for positioning, instrument case bracket positioning assembly for positioning the instrument case bracket, front mask installation tube positioning assembly for positioning the front mask installation tube, and front mask installation lugs for The positioned front mask is equipped with a lug positioning assembly, a direction locking block positioning assembly for positioning the direction locking block, and a lower beam tube front section positioning assembly for positioning the front section of the lower beam tube.

In this way, the welding fixture of the above proposal can realize the clamping and positioning of the main body of the front section of the scooter frame body and the auxiliary components thereon at the same time. After positioning, the welding gun can be directly used to quickly realize the welding and fixing between the components. The mutual position accuracy of each component is reliable and the welding operation is convenient and fast, which greatly saves the cost.

As an optimization, the head tube positioning assembly includes a standard square box for head tube positioning with an overall rectangular structure, and each side of the standard square box for head tube positioning is at the same distance as the installation holes on the three-dimensional installation platform. There are several mounting holes arranged in the aperture array, and the standard square box for head tube positioning is fixed on the middle of the front side of the three-dimensional installation platform by bolts; the upper end of the standard square box for head tube positioning is fixedly provided with a standard angler for head tube positioning The standard angler for the positioning of the head tube 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 are rotatably hinged and are provided at the hinge for realizing rotation angle positioning The rotation angle positioning pin, the fixed block and the rotating block are arranged with a number of installation holes according to the same spacing and aperture array as the installation holes on the three-dimensional installation platform, and the opening and closing end of the fixed block of the standard angler is used for the positioning of the head tube Arranged forward and horizontally fixed on the upper end of the standard square box for head tube positioning by bolts, the middle part of the upper surface of the rotating block of the standard angler for the head tube positioning is fixed upwardly with a head tube positioning round table, the diameter of the head tube positioning round table and The outer diameter of the lower end of the head tube is matched, and a head tube positioning post matching the inner diameter of the head tube is arranged coaxially at the axis of the head tube positioning round table.

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 ignition switch lock bracket positioning assembly includes a support angle iron for positioning the ignition switch lock bracket that is in a right-angled trapezoidal structure as a whole. There are a number of mounting holes arranged in an array of consistent spacing and apertures. The lower surface of the supporting angle iron for the positioning of the ignition switch lock bracket is fitted and fixed by bolts on the upper surface of the rotating block of the standard angler for positioning the head tube. The ignition switch The rear side of the supporting angle iron for the positioning of the lock bracket is a right-angled surface and is arranged parallel to the position in front of the positioning column of the head tube. The upper part of the rear side of the supporting angle iron for the positioning of the ignition switch lock bracket is fixedly provided with an ignition switch lock bracket positioning block. The ignition switch lock bracket The rear end of the positioning block extends backward to the right side of the upper part of the positioning column of the head tube, and correspondingly sets the positioning hole of the ignition switch lock bracket. The positioning hole of the ignition switch lock bracket is equipped with the positioning pin of the ignition switch lock bracket, and the positioning pin of the ignition switch lock bracket It is used to insert into the assembly hole on the ignition switch lock bracket and the positioning hole of the ignition switch lock bracket to realize the positioning of the ignition switch lock bracket.

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 instrument case bracket positioning assembly includes an instrument case bracket positioning connection block, the front end of the instrument case support positioning connection block is fixed on the upper surface of the support angle iron for ignition switch lock bracket positioning by bolts, and the instrument case support positioning connection block The lower surface of the end is fixed with an instrument case bracket positioning block. The instrument case bracket positioning block has an instrument case support positioning part extending downward to the corresponding position outside the rear side of the upper part of the head tube positioning column. The instrument case support positioning part is correspondingly provided with an instrument case The bracket positioning hole is matched with an instrument case bracket positioning pin, and the instrument case bracket positioning pin is used to insert into the instrument case bracket positioning hole and the assembly hole on the instrument case bracket to realize the positioning of the instrument case bracket.

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 front mask installation tube positioning assembly includes a front mask installation tube support angle iron, and each side of the front mask installation tube support angle iron is arranged according to the same spacing and aperture array as the installation holes on the three-dimensional installation platform There are a number of mounting holes, and the front mask mounting tube support angle iron has a vertically arranged right side, and the lower part of the right side is fitted and fixedly connected to the left side of the rotating block of the standard angler for positioning the head tube by bolts , the upper surface of the front mask installation pipe support angle iron is fixed with a front mask installation pipe positioning plate, the left side of the front mask installation pipe positioning plate is fixed on the upper surface of the front mask installation pipe support angle iron by bolts and the right side extends to the right To the top of the middle part of the rotating block of the standard angler for head tube positioning, the front mask installation tube positioning plate is arranged parallel to the upper surface of the rotating block of the standard angler for head tube positioning and is fixedly arranged on the rear surface of the front cover installation tube positioning plate. A front mask installation tube positioning block, the front mask installation tube positioning block upper surface is provided with a front mask installation tube positioning groove obliquely forward and downward, and the front mask installation tube positioning groove is for the front section of the front mask installation tube to fall into to realize positioning.

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 front mask installation lug positioning assembly includes a front mask installation lug positioning block fixed on the front position of the front surface of the front mask installation tube positioning plate and facing the front mask installation tube positioning groove. The ear positioning block has a front mask installation lug positioning part that protrudes backward and upward, and the lower end of the rear side of the front mask installation lug positioning part is used for abutting against the front end of the front mask installation pipe to limit the position, and the front mask installation lug positioning The upper part of the rear side is used for abutting against the front side of the front mask mounting lug for limit.

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 direction lock block positioning assembly includes a direction lock block positioning block fixed on the upper surface of the head tube positioning round table on the upper surface of the rotating block of the standard angler for head tube positioning, and the direction lock block positioning block is facing the head tube positioning round table One side is correspondingly provided with a direction lock block positioning groove, and the direction lock block positioning groove is used for the front end of the direction lock block to fall into and realize the abutment limit.

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 lower beam tube front section positioning assembly includes a lower beam tube front section positioning block fixedly arranged on the upper part of the rear side of the standard square box for head tube positioning, and the left and right ends of the lower beam tube front section positioning block are respectively A lower beam tube front section positioning part is formed corresponding to the rearward protrusion, and the rear side of the lower beam tube front section positioning part is correspondingly provided with a lower beam tube front section positioning groove for the lower beam tube front section to fall into for positioning.

In this way, during specific processing, first adjust the angle of the head tube positioning standard angler to the required angle, and then insert the head tube into the head tube positioning column so that the lower end and the head tube positioning round table are abutted and supported. Realize the positioning of the head tube; attach the left end of the ignition switch lock bracket to the installation position on the right side of the upper end of the head tube, and insert the positioning pin of the ignition switch lock bracket into the positioning hole of the ignition switch lock bracket and the assembly hole on the ignition switch lock bracket to realize alignment. The positioning of the ignition switch lock bracket; attach the front end of the instrument case bracket to the installation position on the rear side of the upper end of the head tube, and insert the instrument case support positioning pin into the instrument case support positioning hole and the assembly hole on the instrument case support to realize the instrument case support The positioning of the direction lock block; the rear side of the direction lock block is attached to the installation position of the front side of the lower end of the head tube, so that the front end of the direction lock block falls into the positioning groove of the direction lock block to realize the positioning of the direction lock block; the front end of the lower beam tube is attached to the The middle part of the head tube corresponds to the installation position, so that the front section of the lower beam tube falls into the positioning groove of the front section of the lower beam tube to realize the positioning of the left and right direction of the front section of the lower beam tube; after the overall positioning of the lower beam tube, you can First, use a welding torch to complete the welding and fixing between the head tube and the front end of the lower beam tube, the ignition switch lock bracket, the instrument case bracket and the direction lock block; then remove the supporting angle iron for positioning the ignition switch lock bracket to avoid interference, and then Attach the rear end of the front mask installation pipe to the corresponding installation position on the front side of the upper part of the head tube, so that the front section of the front mask installation pipe falls into the positioning groove of the front mask installation pipe, so that the front end of the front mask installation pipe touches the front mask installation support The position of the lower end of the rear side of the ear positioning part realizes the complete limit of the front mask installation tube; The side abuts against the upper part of the rear side of the front mask installation lug positioning part to realize the limit, and then the welding torch can be used to complete the welding between the front mask installation tube and the head tube and between the front mask installation tube and the front mask installation lug; That is, the welding and fixing process of the front section member of the frame for the scooter sample is completed. 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 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, 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. In particular, the supporting angle iron for the positioning of the ignition switch lock bracket can not only realize the installation and support of the positioning components of the ignition switch lock bracket and the instrument case bracket at the same time, but also can be used first and then disassembled to avoid interference before completing the installation of the front mask. The positioning and clamping welding avoids mutual interference and greatly improves the welding efficiency of the front section of the frame.

To sum up, the present invention can simplify the welding and assembly process, has the advantages of simple operation, low cost, and can facilitate the trial production and adjustment of the front section of the scooter sample.

Description of drawings

Fig. 1 is a front view of a frame welding jig for a scooter sample used in the implementation of the present invention.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a front view of Fig. 1 when in use.

FIG. 4 is a top view of FIG. 3 .

detailed description

The present invention will be further described in detail below in conjunction with a scooter sample frame welding jig and accompanying drawings used during the implementation of the present invention. (for scooter model LF-125-T)

Optimum implementation mode: as shown in Figure 1-4, a scooter sample frame welding fixture required for the implementation of this method 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 welding fixture structure of the front section of the frame, the positioning welding fixture structure of the middle section of the vehicle frame and the positioning welding fixture structure of the rear section of the vehicle frame arranged on the three-dimensional installation platform 1; the front part of the vehicle frame The section positioning welding fixture structure is used to realize the alignment of the head tube 2, ignition switch lock bracket 3, instrument case bracket 4, front cover installation tube 5, front cover installation lug 6, direction lock block 7 and lower beam tube front section 8. Positioning; the positioning welding fixture structure of the middle section of the vehicle frame is used to realize the front section 9 of the two upper beam tubes, the front bracket 10 of the trunk, the lower bracket 11 of the luggage box, the middle section 12 of the two lower beam tubes, the pedal bracket 13, The positioning of the rear beam tube 14, the rear cross beam tube 15, the engine suspension bracket 16, the rear shock absorber 17, the upper beam tube reinforcement plate 18 and the seat cushion lock bracket 19; the positioning welding fixture structure of the rear section of the vehicle frame is used to realize The positioning of the two upper beam tube rear sections 20, the trunk rear bracket 21, the upper beam tube 22, the tail tube 23, the seat cushion rear bracket 24, the rear armrest lug 25, the tail cover installation lug 26 and the tail cover bracket 27 .

In this way, the welding fixture of the above-mentioned solution can realize the clamping and positioning of the front, middle and rear parts of the frame main body and the auxiliary components thereon at the same time. After positioning, the welding gun can be directly used to quickly realize the welding and fixing between the components. . The mutual position accuracy of each component is reliable and the welding operation is convenient and fast, which greatly saves the cost.

Wherein, the positioning welding fixture structure of the front section of the vehicle frame includes a head tube positioning assembly, an ignition switch lock bracket positioning assembly, an instrument case bracket positioning assembly, a front mask installation tube positioning assembly, a front mask installation lug positioning assembly, and a direction lock block The positioning component and the positioning component of the front section of the lower beam tube;

The head tube positioning assembly includes a standard square box 28 for head tube positioning with a rectangular structure as a whole, and each side of the standard square box 28 for head tube positioning is at the same distance as the installation holes on the three-dimensional installation platform 1. and the aperture array are arranged with some mounting holes, and the standard square box 28 for head tube positioning is fixed on the middle position of the front side of the three-dimensional installation platform 1 by bolts; the standard square box 28 upper end for the head tube positioning is fixedly provided with a head tube positioning Standard angler 29, the standard angler 29 for the positioning of the head tube 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 are rotatably hinged and are provided at the hinge for Realize the rotation angle positioning pin of the rotation angle positioning, the fixed block and the rotation block are arranged with a number of mounting holes according to the same spacing and aperture array as the mounting holes on the three-dimensional mounting platform 1, and the head tube positioning uses a standard angler The opening and closing end of the fixed block of 29 is arranged forward and is horizontally fixed on the upper end of the standard square box 28 for positioning the head tube by bolts. 30, the diameter of the head tube positioning round platform 30 matches the outer diameter of the lower end of the head tube 2, and a head tube positioning column 31 matching the inner diameter of the head tube 2 is arranged on the same axis at the center of the head tube positioning round platform;

The ignition switch lock bracket positioning assembly includes a support angle iron 32 for positioning the ignition switch lock bracket that is in a right-angled trapezoidal structure as a whole. There are several mounting holes arranged in an array of the same spacing and apertures on the mounting holes. The lower surface of the supporting angle iron 32 for positioning the ignition switch lock bracket is fitted and fixed on the upper surface of the rotating block of the standard angler 29 for positioning the head tube by bolts. The rear side of the support angle iron 32 for the positioning of the fire switch lock bracket is a right-angled surface and is arranged parallel to the position in front of the head tube positioning column 31, and the upper part of the rear side of the support angle iron 32 for the positioning of the ignition switch lock bracket is fixedly provided with an ignition switch lock bracket positioning block 33. The rear end of the ignition switch lock bracket positioning block 33 extends backward to the position on the upper right side of the head tube positioning column and is correspondingly provided with the ignition switch lock bracket positioning hole. The ignition switch lock bracket positioning hole is matched with the ignition switch lock bracket positioning pin , the positioning pin of the ignition switch lock bracket is used to insert into the assembly hole on the ignition switch lock bracket and the positioning hole of the ignition switch lock bracket to realize the positioning of the ignition switch lock bracket 3;

The instrument case bracket positioning assembly includes an instrument case bracket positioning connection block 34, the front end of the instrument case support positioning connection block 34 is fixed on the upper surface of the supporting angle iron 32 for positioning the ignition switch lock bracket by bolts, and the instrument case support positioning connection block 34 The lower surface of the rear end is fixedly provided with an instrument case bracket positioning block 35. The instrument case bracket positioning block 35 has an instrument case bracket positioning part extending downward to the corresponding position outside the rear side of the upper part of the head tube positioning column. There are instrument case bracket positioning holes and are equipped with instrument case bracket positioning pins, and the instrument case bracket positioning pins are used to insert into the instrument case bracket positioning holes and the assembly holes on the instrument case bracket 4 to realize the positioning of the instrument case bracket 4;

The front mask installation tube positioning assembly includes a front mask installation tube support angle iron 36, and each side of the front mask installation tube support angle iron 36 is arranged according to the same spacing and aperture array as the installation holes on the three-dimensional installation platform 1 There are several installation holes, and the front cover installation pipe support angle iron 36 has a vertically arranged right side, and the lower part of the right side is fitted and fixedly connected by bolts to the left side of the rotating block of the standard angler 29 for positioning the head tube. On the face, the upper surface of the front mask installation pipe support angle iron 36 is fixedly provided with a front mask installation pipe positioning plate 37, and the left side of the front mask installation pipe positioning plate 37 is fixed on the front mask installation pipe support angle iron upper surface and the right side of the front mask installation pipe positioning plate 37. The side portion extends rightward to the top of the middle part of the rotating block of the standard angler 29 for head tube positioning, and the front mask installation tube positioning plate 37 is arranged parallel to the upper surface of the rotating block of the standard angler 29 for head tube positioning and positioned on the front cover installation tube. The rear position of the upper surface of the plate 37 is fixedly provided with a front mask installation tube positioning block 38, and the upper surface of the front mask installation tube positioning block 38 is provided with a front mask installation tube positioning groove obliquely forward and downward. The front section of the front mask installation pipe 5 falls into and realizes positioning;

The front mask installation lug positioning assembly includes a front mask installation lug positioning block 39 fixed on the front position of the upper surface of the front mask installation tube positioning plate 37 and facing the front mask installation tube positioning groove. The positioning block 39 has a front mask installation lug positioning part protruding backward and upward, the lower end of the rear side of the front mask installation lug positioning part is used to abut the front end of the front mask installation pipe 5 to limit the position, and the front mask installation lug The upper part of the rear side of the positioning part is used to abut against the front side of the front mask mounting lug 6 for limit;

The direction lock block positioning assembly includes a direction lock block positioning block 40 fixed on the upper surface of the head tube positioning round table 30 on the upper surface of the rotating block of the standard angler 29 for head tube positioning, and the direction lock block positioning block 40 is positioned against the head tube One side of the round table 30 is correspondingly provided with a direction lock block positioning groove, and the direction lock block positioning groove is used for the front end of the direction lock block 7 to fall into and realize the abutment limit;

The lower beam tube front section positioning assembly includes a lower beam tube front section positioning block 41 fixedly arranged on the upper part of the rear side of the standard square box 28 for head tube positioning, and the left and right ends of the lower beam tube front section positioning block 41 respectively A lower beam tube front section positioning part is formed corresponding to the rearward protrusion, and the rear side of the lower beam tube front section positioning part is correspondingly provided with a lower beam tube front section positioning part for the lower beam tube front section 8 to fall into for positioning. groove.

In this way, when in use, first adjust the angle of the head tube positioning standard angler to the required angle, and then insert the head tube into the head tube positioning column so that the lower end and the head tube positioning round table abut and support and realize Positioning of the head tube: attach the left end of the ignition switch lock bracket to the installation position on the right side of the upper end of the head tube, and insert the positioning pin of the ignition switch lock bracket into the positioning hole of the ignition switch lock bracket and the assembly hole on the ignition switch lock bracket to realize alignment The positioning of the switch lock bracket; attach the front end of the instrument case bracket to the installation position on the rear side of the upper end of the head tube, and insert the positioning pin of the instrument case bracket into the positioning hole of the instrument case bracket and the assembly hole on the instrument case bracket to realize the positioning of the instrument case bracket Positioning; attach the rear side of the direction lock block to the installation position on the front side of the lower end of the head tube, so that the front end of the direction lock block falls into the positioning groove of the direction lock block to realize the positioning of the direction lock block; attach the front end of the lower beam tube to the front of the car The middle part of the tube corresponds to the installation position, so that the front section of the lower beam tube falls into the positioning groove of the front section of the lower beam tube to realize the positioning of the left and right direction of the front section of the lower beam tube; after the overall positioning of the lower beam tube, you can first Use a welding torch to complete the welding and fixing between the head tube and the front end of the lower beam tube, the ignition switch lock bracket, the instrument case bracket and the direction lock block; then remove the supporting angle iron for positioning the ignition switch lock bracket to avoid interference, and then install The rear end of the front mask installation pipe fits to the corresponding installation position on the front side of the upper part of the head tube, so that the front section of the front mask installation pipe falls into the positioning groove of the front mask installation pipe, so that the front end of the front mask installation pipe touches the front mask installation lug The position of the lower end of the rear side of the positioning part realizes the complete limit of the front mask installation tube; then the rear side of the front mask installation lug is attached to the positioned front end installation position of the front mask installation tube, and the front side of the front mask installation lug is Butt against the upper part of the rear side of the front mask installation lug positioning part to realize the limit, and then use the welding torch to complete the welding between the front mask installation tube and the head tube and between the front mask installation tube and the front mask installation lug; that is Complete the welding and fixing process of the front section component of the frame for the scooter sample. 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 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 the sample trial production needs to adjust the position of the local components of each component, which greatly saves the cost of research and development (in actual implementation, the standard components themselves are all existing technologies and are products that can be purchased directly in the market, so the specific structure not disclosed in detail in the examples). 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. In particular, the supporting angle iron for the positioning of the ignition switch lock bracket can not only realize the installation and support of the positioning components of the ignition switch lock bracket and the instrument case bracket at the same time, but also can be used first and then disassembled to avoid interference before completing the installation of the front mask. The positioning and clamping welding avoids mutual interference and greatly improves the overall welding efficiency of the frame.

Wherein, the positioning welding fixture structure of the middle section of the vehicle frame includes a positioning assembly for the front section of the upper beam tube, a positioning assembly for the front bracket of the trunk, a positioning assembly for the lower bracket of the trunk, a positioning assembly for the middle section of the lower beam tube, and a positioning assembly for the pedal bracket , Rear beam tube positioning assembly, rear beam tube positioning assembly, engine suspension bracket positioning assembly, rear shock absorber positioning assembly, upper beam tube reinforcement plate and seat cushion lock bracket positioning assembly;

The positioning assembly for the front section of the upper beam tube includes two left-right symmetrical support angle irons 42 for positioning the front section of the first upper beam tube that are arranged at the front end of the upper surface of the three-dimensional installation platform 1. On each side of the supporting angle iron 42 for section positioning, several installation holes are arranged according to the same spacing and aperture array as the installation holes on the three-dimensional installation platform 1. The lower surface of the supporting angle iron 42 for positioning the front section of the first upper beam tube Combined and fixed on the three-dimensional installation platform 1 by bolts, the left and right spacing between the two first upper beam tube front section positioning support angle irons 42 is greater than the transverse width dimension of the middle section of the vehicle frame, and the first upper beam tube front section The rear side of the supporting angle iron 42 for positioning is a vertical plane, and a supporting angle iron 43 for positioning the front section of the second upper beam tube is fixed on the upper part of the rear side. A number of installation holes are arranged on each side of the support angle iron 43 according to the same spacing and aperture array as the installation holes on the three-dimensional installation platform 1. The support angle iron 43 for positioning the front section of the second upper beam tube has a vertical The front side of the first upper beam tube is fixedly connected with the rear side of the supporting angle iron 42 for the positioning of the front section of the first upper beam tube, and the upper surface of the supporting angle iron 43 for the positioning of the front section of the second upper beam tube is a horizontal surface And the upper surface is fixedly connected with a horizontally arranged rectangular block-shaped upper beam tube front section positioning support plate 44 by bolts, and the left and right ends of the upper surface front part of the upper beam tube front section positioning support plate 44 and The left and right ends of the rear position are respectively fixed with a positioning block 45 for the front section of the upper beam tube, and the upper surface of the positioning block 45 for the front section of the upper beam tube is provided with a positioning groove for the front section of the upper beam tube. 9 falls into realization positioning;

The front bracket positioning assembly of the luggage case includes a standard square box 46 for the positioning of the luggage bracket in a rectangular structure as a whole. A number of installation holes are arranged in an array of consistent spacing and apertures. The lower end of the standard square box 46 is used for the positioning of the trunk bracket and is fixed by bolts on the upper surface of the rear end of the upper surface of the front section of the upper beam tube. Case bracket positioning is fixed with a forwardly protruding luggage case front bracket positioning block 47 by bolt on the standard square box 46 front sides, and a luggage front bracket positioning groove is horizontally arranged on the front bracket positioning block 47 upper surface of the luggage case, so The front bracket locating groove of the luggage case is used for falling into the middle of the front bracket 10 of the luggage case to fit and locate;

The lower bracket positioning assembly of the luggage case includes a standard square box 46 for positioning the luggage bracket, and also includes a lower bracket positioning block 48 fixed on the rear side of the standard square box 46 for positioning the luggage bracket by bolts, The rear end of the luggage case lower bracket positioning block 48 is upturned to form a luggage case lower bracket positioning part, and the luggage case lower bracket positioning part is correspondingly provided with a luggage case lower bracket positioning hole and a luggage case lower bracket positioning pin. The lower surface of the positioning part of the lower bracket of the luggage case is used to fit the upper end surface of the lower bracket of the luggage case to realize positioning, and the positioning pin of the lower bracket of the luggage case can pass through the positioning hole of the lower bracket of the luggage case and the mounting hole on the lower bracket of the luggage case 11 to realize alignment of the luggage. The positioning and locking of the bracket 11 under the box;

The lower beam tube middle section positioning assembly includes a lower beam tube middle section positioning component arranged on the upper surface of the three-dimensional installation platform 1 and located in the middle of the adjacent position behind the two first upper beam tube front section positioning support angle irons 42. The standard square box 49, the standard square box 49 used for positioning the middle section of the lower beam tube has a rectangular body structure as a whole, 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 1, and the lower beam The bottom surface of the standard square box 49 for positioning the middle section of the pipe is attached to and fixed on the upper surface of the three-dimensional installation platform 1 by bolts; the middle section of the lower beam tube is positioned on the outer surface of the standard square box 49 in the left and right directions. The middle section positioning block 50, the upper surface of the lower beam tube middle section positioning block 50 is matched with the lower beam tube middle section positioning groove along the front and rear direction, and the lower beam tube middle section 12 falls to realize positioning;

The pedal bracket positioning assembly includes two standard square boxes 51 for pedal bracket positioning with a rectangular structure as a whole and a number of mounting holes arranged on each side according to the same spacing and aperture array as the mounting holes on the three-dimensional installation platform 1 The lower surface of the standard square box 51 for the positioning of the pedal bracket is bonded and fixed on the upper surface of the three-dimensional installation platform 1 by bolts and is symmetrically arranged on the outer position of the standard square box 49 for positioning the middle section of the lower beam tube in the left and right direction. The upper surface of the standard square box 51 for positioning is provided with a standard angler 52 for the positioning of the pedal bracket, and the standard angler 52 for the positioning of the pedal bracket includes a fixed block and a rotating block each having a hinged end and an opening and closing end, the fixed block and The hinged end of the rotating block can be rotatably hinged, and a rotating angle positioning pin for realizing the positioning of the rotating angle is provided at the hinge, and the fixed block and the rotating block are arranged according to the same spacing and aperture array as the mounting holes on the three-dimensional installation platform 1 A number of installation holes are arranged, and the opening and closing end of the fixed block of the standard angler 52 for the positioning of the pedal bracket is arranged backward and fixed on the upper surface of the standard square box 51 for positioning the pedal bracket horizontally by bolts. The upper surface of the rotating block of the device 52 is fixedly connected with a pedal bracket positioning block 53, and the inner end of the pedal bracket positioning block 53 extends inward to the position above the positioning block 50 in the middle section of the lower beam tube, and a pedal is vertically arranged on this end. The bracket positioning hole is matched with the pedal bracket positioning pin, and the pedal bracket positioning pin is used to insert the pedal bracket positioning hole and the assembly hole on the pedal bracket to realize the positioning of the pedal bracket 13;

The rear beam tube positioning assembly includes a rear beam tube positioning block 54 located at the corresponding position in the middle of the rear of the standard square box 49 on the upper surface of the three-dimensional installation platform 1 for positioning the lower beam tube middle section. The lower end of the rear beam tube positioning block 54 has a horizontally convex mounting support The ears are fixed on the three-dimensional installation platform 1 by bolts, and the upper end of the rear beam tube positioning block 54 has a horizontally arranged rear beam tube positioning groove for the rear lower end of the rear beam tube 14 to fall into to realize positioning;

The rear beam tube positioning assembly includes a standard square box 55 for positioning the rear beam tube in a rectangular structure as a whole, and each side of the standard box 55 for positioning the rear beam tube is in accordance with the mounting holes on the three-dimensional installation platform 1. A number of installation holes are arranged in a consistent spacing and aperture array, and the lower surface of the standard square box 55 for positioning the rear beam tube is fitted and fixed on the upper surface of the three-dimensional installation platform 1 by bolts and is located in the standard square box 49 for positioning the middle section of the lower beam tube. Between the rear beam tube positioning block 54, the rear beam tube positioning is fixed with a rear beam tube positioning block 56 in the middle part of the rear side 55 of the standard square box by bolts, and a rear beam tube positioning groove is arranged horizontally on the rear beam tube positioning block 56 upper end And for the rear beam pipe 15 to fall into the location;

The positioning assembly of the engine suspension bracket includes a standard square box 57 for the positioning of the middle and rear accessories of the vehicle frame in a rectangular body structure, and each side of the standard square box 57 for the positioning of the middle and rear accessories of the vehicle frame is installed according to and three-dimensionally. The mounting holes on the platform 1 are arranged in a consistent spacing and aperture array with several mounting holes. The middle and rear accessories of the vehicle frame are positioned on the lower surface of a standard square box 57 and fixed on the upper surface of the three-dimensional mounting platform 1 by bolts. Adjacent to the rear, a standard square box 57 for the positioning of the rear accessories in the vehicle frame is respectively fixed with an engine suspension bracket positioning block 58 by bolts at the lower parts of the left and right sides, and the front end of the engine suspension bracket positioning block 58 extends out of the vehicle frame middle and rear accessories. Positioning is provided with standard square box 57 and horizontally is provided with engine suspension bracket positioning hole, is matched with engine suspension bracket locating pin in the engine suspension bracket positioning hole and is used for inserting the assembly hole on the engine suspension bracket 16 to realize the location to engine suspension bracket 16;

The positioning assembly of the upper beam tube reinforcement plate and the seat cushion lock bracket includes two supporting angle irons 59 for positioning the upper beam tube reinforcement plate at the middle positions of the left and right sides of the standard square box 57 for positioning the accessories at the middle and rear of the vehicle frame. On each side of the support angle iron 59 for the positioning of the upper beam tube reinforcement plate, 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 1. It is a vertical plane and attached to the middle and rear parts of the vehicle frame. The left and right sides of the standard square box 57 are fixed by bolts for the positioning of the rear accessories. It is used to abut against the lower end surface of the upper beam tube reinforcement plate 18 to realize the positioning of the upper beam tube reinforcement plate. The position of the upper beam tube reinforcement plate is fixed with a support angle iron 59 on the outer end of the upper surface, and a seat cushion lock bracket is positioned Block 60, the upper surface of the inner end of the cushion lock bracket positioning block 60 is used to fit the lower surface of the seat cushion lock bracket 19 to realize the positioning of the seat cushion lock bracket 19, and the inner end of the seat cushion lock bracket positioning block 60 is also There is a seat cushion lock bracket positioning hole arranged vertically and is equipped with a seat cushion lock bracket positioning pin. The seat cushion lock bracket positioning pin is used to insert into the seat cushion lock bracket positioning hole and the assembly hole on the seat cushion lock bracket 19 to realize alignment of the seat cushion. Locking of the lock bracket 19;

The rear shock-absorbing lug positioning assembly includes two rear shock-absorbing lug positioning blocks 61. Both sides of the rear end of the rear shock-absorbing lug positioning block 61 have fixed parts extending transversely. The fixing parts are provided with mounting holes and It is fixed on the front side of the support angle iron 59 for positioning the upper beam tube reinforcement plate by bolts, and the front end of the rear shock absorber positioning block 61 extends forward to the position of the corresponding rear shock absorber and is provided with a rear shock absorber in the front transverse direction. The positioning hole of the shock-absorbing lug, the positioning hole of the rear shock-absorbing lug is horizontally fitted with the positioning shaft of the rear shock-absorbing lug, and the positioning shaft of the rear shock-absorbing lug is used to pass through the positioning hole of the rear shock-absorbing lug and the rear shock-absorbing lug The ear hole on the ear 17 realizes the positioning of the rear shock-absorbing ear 17 .

In this way, when in use, first remove the positioning support plate of the front section of the upper beam tube to avoid interference, and then attach the front end of the lower beam tube to the installed position on both sides of the head tube that has been positioned, so that the middle section of the lower beam tube falls into the lower beam tube. The positioning of the lower beam tube is realized in the positioning groove in the middle section of the beam tube; adjust the opening angle of the standard angler for pedal bracket positioning so that the inclination angle of the upper surface of the rotating block of the standard angler for pedal bracket positioning is consistent with the inclination angle of the upper surface of the pedal bracket , attach the inner mounting end of the pedal bracket to the corresponding installation position on the lower beam tube, and then insert the positioning pin of the pedal bracket into the positioning hole of the pedal bracket and the assembly hole on the pedal bracket to realize the positioning of the pedal bracket; attach the front end of the rear beam tube Arbut to the corresponding installation position of the rear lower part of the lower beam tube, so that the rear lower end of the rear beam tube falls into the positioning groove of the rear beam tube to realize positioning; place the middle part of the rear beam tube in the positioning groove of the rear beam tube and make its two ends at the two ends of the rear beam tube At the installation position between the support arms, the positioning of the rear beam tube is realized; the front end connection of the engine suspension bracket is abutted against the installation position on the rear beam tube, and the positioning pin of the engine suspension bracket is inserted into the assembly hole on the engine suspension bracket to realize the positioning of the engine The positioning of the suspension bracket: attach and abut the front end of the rear shock-absorbing lug to the corresponding installation position at the rear of the lower beam tube, and the positioning axis of the rear shock-absorbing lug passes through the positioning hole of the rear shock-absorbing lug and the rear shock-absorbing lug The lug holes of the upper beam tube are used to position the rear shock absorbing lugs; then install the positioning support plate for the front section of the upper beam tube, and connect the front end of the upper beam tube to the corresponding installation position of the front section of the lower beam tube, so that the front of the upper beam tube The section falls into the positioning groove of the front section of the upper beam tube to realize the positioning of the front section of the upper beam tube; the upper end of the front bracket of the luggage box is dropped into the positioning groove of the front bracket of the luggage box and the lower end is attached to the upper beam tube The installation position on the upper surface of the front section realizes the positioning of the front bracket of the trunk; then attach the lower end of the lower bracket of the trunk to the installation position on the upper surface of the front section of the upper beam tube so that the upper end surface of the lower bracket of the trunk is pressed tightly Go to the lower surface of the positioning part of the lower bracket of the luggage case, and then rely on the positioning pin of the lower bracket of the luggage case to pass through the positioning hole of the lower bracket of the luggage case and the installation hole on the lower bracket of the luggage case to realize the locking of the lower bracket of the luggage case. The pressing force acts on the front section of the upper beam tube, the lower beam tube, the rear beam tube and the engine suspension bracket in sequence, and simultaneously realizes the alignment of the front section of the upper beam tube, the lower beam tube, the rear beam tube and the engine suspension bracket Compression after positioning; then attach the upper end side of the upper beam tube reinforcement plate to the corresponding installation position on the outer side of the connection between the lower beam tube and the upper beam tube, so that the lower end surface of the upper beam tube reinforcement plate touches the upper beam tube reinforcement plate for positioning Use the position of the inner end of the upper surface of the supporting angle iron to realize the positioning of the upper beam tube reinforcement plate, and then fit the lower surface of the seat cushion lock bracket to the upper surface of the inner end of the seat cushion lock bracket positioning block and make the inner side of the seat cushion lock bracket fit Go to the corresponding installation position on the outer side of the upper beam tube reinforcement plate, and then insert the positioning pin of the seat cushion lock bracket into the positioning hole of the seat cushion lock bracket and the assembly hole on the seat cushion lock bracket to realize the positioning and locking of the seat cushion lock bracket, and at the same time The complete positioning of the upper beam tube reinforcement plate is realized by the locking and positioning of the seat cushion lock bracket; and then the welding and fixing between the above-mentioned positioning components is realized at one time with a welding torch, that is, the test of the scooter is completed. Welding and fixing processing of each component in the middle section of the sample frame. 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 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, 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. In particular, the positioning component structure that realizes the positioning of the front section of the upper beam tube, the front bracket of the trunk and the rear bracket of the luggage box is all arranged on a positioning support plate for the front section of the upper beam tube supported on both sides, and then the upper beam The positioning support plate of the front section of the tube is detachable, so that the positioning support plate of the front section of the upper beam tube can be removed first to complete the clamping and positioning of the lower components, and then the positioning support plate of the front section of the upper beam tube is installed. The upper component is completed Clamping and positioning, thus avoiding clamping interference to ensure that more components can be clamped at one time, which greatly improves efficiency. At the same time, the positioning component of the lower bracket of the luggage case is designed as a clamping structure that is fixed and locked by pressing down, and the downward pressure of the lower bracket positioning component of the luggage case can act on the lower components of the luggage case in turn to realize alignment. The compression of the lower components after clamping improves the reliability of clamping and ensures the welding accuracy of subsequent welding.

Wherein, the frame rear section positioning welding fixture structure includes the upper beam tube rear section positioning assembly, the trunk rear bracket positioning assembly, the upper beam tube positioning assembly, the tail pipe positioning assembly, the seat cushion rear bracket positioning assembly, and the rear armrest Lug positioning assembly, tail cover mounting lug positioning assembly and tail cover support positioning assembly;

The positioning assembly for the rear section of the upper beam tube includes two left and right symmetrically arranged on the rear end of the upper surface of the three-dimensional installation platform 1, supporting angle irons 62 for positioning the accessories of the rear section of the frame. A number of installation holes are arranged on each side of the support angle iron 62 according to the same spacing and aperture array as the installation holes on the three-dimensional installation platform 1, and the lower surface of the support angle iron 62 is attached to the lower surface of the support angle iron 62 for the positioning of the accessories of the rear section of the frame and is fixedly connected by bolts On the three-dimensional installation platform 1, the front side of the support angle iron 62 for the positioning of the rear section accessories of the vehicle frame is a vertically arranged installation surface, and a standard angler 63 for positioning the rear section of the upper beam tube is respectively arranged on the upper part of the front side. The standard angler 63 for positioning the rear section of the upper beam tube 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 are rotatably hinged and are provided with Rotation angle positioning pins for positioning the rotation angle. The fixed block and the rotating block are arranged with a number of installation holes according to the same spacing and aperture array as the installation holes on the three-dimensional installation platform. The rear section of the upper beam tube is used for positioning. The opening and closing end of the fixed block of the standard angler 63 is arranged downward and fixed vertically by bolts on the upper part of the front side of the support angle iron 62 for the positioning of the accessories of the rear section of the frame, and the standard angler for positioning the rear section of the upper beam tube The rotating block of 63 is arranged in parallel below the rear section 20 of the upper beam tube of the vehicle frame, and a standard angler is used for positioning the rear section of the upper beam tube. Segment positioning plate 64, a number of installation holes are arranged on the rear section positioning plate 64 of the upper beam tube according to the same spacing and aperture array as the installation holes on the three-dimensional installation platform 1, the front, upper, left, and right sides of the upper beam tube rear section positioning plate A positioning block 65 for the rear section of the upper beam tube is correspondingly and fixedly arranged on both sides, and the positioning block 65 for the rear section of the upper beam tube is correspondingly provided with a positioning groove for the rear section of the upper beam tube along the front and rear direction for the rear section of the upper beam tube. Segment 20 falls into position;

The positioning assembly for the rear bracket of the luggage case includes two supporting angle irons 66 for positioning the rear bracket of the luggage case, which are symmetrically arranged on the positioning plate 64 of the rear section of the upper beam tube inside the positioning blocks 65 of the rear section of the upper beam tube. The supporting angle irons 66 for positioning the rear bracket of the luggage case are arranged with several mounting holes on each side according to the same spacing and aperture array as the mounting holes on the three-dimensional installation platform 1, and the supporting angle irons 66 for positioning the rear bracket of the luggage case The lower surface is fitted and fixedly connected to the positioning plate 64 of the rear section of the upper beam tube by bolts, and the outer surface of the supporting angle iron 66 for the positioning of the rear bracket of the two trunks is a vertical installation surface, and the upper part of the outer surface is respectively fixed by bolts There is a trunk rear bracket positioning block 67, and the trunk rear bracket positioning block 67 has a trunk rear bracket positioning part extending laterally outwards, and the lower surface of the trunk rear bracket positioning part is used to stick to the upper end surface of the trunk rear bracket 21. Combined to realize the compression limit of the rear bracket 21 of the luggage case, the positioning part of the rear bracket of the luggage case also has a positioning hole of the rear bracket of the luggage case vertically and is matched with a positioning pin of the rear bracket of the luggage case, and the positioning of the rear bracket of the luggage case The pin is used to pass through the positioning hole of the rear bracket of the luggage case and the assembly hole on the upper end of the rear bracket 21 of the luggage case to realize the locking and positioning of the rear bracket 21 of the luggage case;

The upper beam tube positioning assembly includes an upper beam tube positioning block 68 fixed on the upper beam tube rear section positioning plate 64 at the rear middle of the upper beam tube rear section positioning plate 64 for the positioning of the two trunk rear brackets. The corresponding position of 68 has an upwardly convex upper beam tube positioning part, and the upper end of the upper beam tube positioning part has a horizontally arranged upper beam tube positioning groove for the upper beam tube 22 to fall into to realize positioning;

The tail pipe positioning assembly includes a standard square box 69 for tail pipe positioning with a rectangular body structure as a whole and horizontally arranged on the upper surface of the supporting angle iron 62 for positioning the accessories of the rear section of the two vehicle frames. All sides of the box 69 are arranged with a number of installation holes according to the same spacing and aperture array as the installation holes on the three-dimensional installation platform 1, and the two ends of the lower surface of the standard square box 69 are used for tail pipe positioning. The supporting angle iron 62 upper end surface of the accessory positioning of the rear section of the vehicle frame, a tail pipe positioning connecting plate 70 is vertically arranged on the rear side of the standard square box 69 for tail pipe positioning, and a tail pipe positioning connecting plate 70 is penetrated on the front and rear sides. There are a number of installation holes arranged in an array of the same spacing and aperture as the installation holes on the three-dimensional installation platform 1. The stern tube positioning connecting plate 70 has a rectangular plate-like structure as a whole and its upper part exceeds the position on the upper surface of the standard square box 69 for stern tube positioning. A tail pipe positioning block 71 is fixedly arranged in the middle of the upper end of the rear side of the tail pipe positioning connecting plate 70. The upper end of the tail pipe positioning block 71 has a tail pipe positioning part extending forward from the tail pipe positioning connecting plate. A tailpipe positioning groove is arranged on the surface corresponding to the transverse direction, and the tailpipe 23 can fall into it to realize positioning;

The seat cushion rear bracket positioning assembly includes a vertically arranged and L-shaped plate-shaped support angle iron 72 for seat cushion rear bracket positioning. The lower end of the seat cushion rear bracket positioning support angle iron 72 is vertically fixed on the tail On the upper side of the front side of the tube positioning connecting plate 70, the upper end of the support angle iron 72 for seat cushion rear bracket positioning extends horizontally to the upper part of the tail tube positioning connecting plate 70, and a seat cushion rear bracket is fixedly connected to the front side of the end. Positioning plate 73, the rear upper part of seat cushion rear bracket positioning plate 73 is vertically arranged and fitted and fixed on the front side of the upper end of the support angle iron for positioning the seat cushion rear support bracket, and the front end of seat cushion rear support positioning plate 73 extends forward and downward And the lower surface is formed at the end for the seat cushion rear bracket positioning part for the upper surface of the seat cushion rear bracket to fit and limit. The seat cushion rear bracket positioning part is also correspondingly provided with seat cushion rear bracket positioning holes and matched with Seat cushion rear bracket positioning pin, the seat cushion rear bracket positioning pin is used to pass through the seat cushion rear bracket positioning hole and the assembly hole on the seat cushion rear bracket to realize the positioning of the seat cushion rear bracket 24;

The rear armrest lug positioning assembly includes two left and right symmetrical rear armrest lug positioning plates 74 arranged vertically on the left and right sides of the tail pipe positioning block 71 on the rear side of the tail pipe positioning connecting plate 70, the rear armrest lug positioning The lower end of the plate 74 is fixed on the tail pipe positioning connecting plate 70 by bolts, the upper end of the rear armrest lug positioning plate 74 is higher than the position of the tail pipe positioning block 71 and is fixedly provided with a rear armrest lug positioning block 75 on the front side. The lug positioning block 75 has a rear armrest lug positioning portion extending forward, the lower surface of the rear armrest lug positioning portion is used to fit the upper surface of the rear armrest lug 25 to achieve positioning, and the rear armrest lug positioning portion is also vertical. The rear armrest lug positioning hole is arranged in the direction and is matched with the rear armrest lug positioning pin. The rear armrest lug positioning pin is used to insert into the rear armrest lug positioning hole and the lug hole on the rear armrest lug 25 to realize the rear armrest lug 25 positioning;

The tail cover installation lug positioning assembly includes two tail cover installation lug positioning blocks 76 arranged symmetrically. The positioning block 76 has a cylindrical tail cover mounting lug positioning boss extending forward. 26 positioning;

The tail cap support positioning assembly includes a tail cap support positioning block 77, the tail cap support positioning block 77 lower end is fixed on the outer surface of the tail pipe positioning block 70, and the tail cap support positioning block 77 upper end surface is used to connect with the tail cap support 27. The lower surface of the rear part fits and realizes spacing, and the middle part of the upper end surface of the tail cap bracket positioning block 77 is also vertically provided with a tail cap bracket positioning hole and is matched with a tail cap bracket positioning pin, and the tail cap bracket positioning pin is used for inserting into the tail cap bracket. The assembling hole and the positioning hole of the tail cap support realize the positioning of the tail cap support 27 .

In this way, when in use, first adjust the angle of the standard angler for positioning the rear section of the upper beam tube so that the upper surface of the rotating block of the standard angler for positioning the rear section of the upper beam tube is parallel to the rear section of the upper beam tube of the vehicle frame, and then Correspondingly drop the rear section of the upper beam tube into the positioning groove of the rear section of the upper beam tube on the positioning block of the rear section of the upper beam tube to realize the positioning of the rear section of the upper beam tube; Connect it to the corresponding installation position on the upper surface of the rear section of the upper beam tube, and make the upper surface of the rear bracket of the trunk be fitted by the lower surface of the positioning part of the rear bracket of the trunk and press the limit, and then pass through the trunk by the positioning pin of the rear bracket of the trunk The positioning hole of the rear bracket and the assembly hole at the upper end of the rear bracket of the trunk realize the positioning and locking of the rear bracket of the trunk, and at the same time, the pressing force of the rear bracket of the trunk is transmitted to the rear section of the upper beam tube by the positioning part of the rear bracket of the trunk Realize the compression of the rear section of the upper beam tube; drop the middle of the upper beam tube into the positioning groove of the upper beam tube and align the two ends with the corresponding installation position on the rear section of the upper beam tube to realize the upper beam tube The positioning of the beam tube; insert the two ends of the front end of the tail pipe into the rear ends of the two upper beam tubes and make the middle of the rear end of the tail pipe fall into the positioning groove of the tail pipe to realize the positioning of the tail pipe; insert the lower end of the rear bracket of the seat cushion and the Fit the corresponding installation position on the tail pipe, and make the upper end of the rear bracket of the seat cushion fit and press tightly to the lower surface of the front end of the positioning plate of the rear bracket of the seat cushion, and then use the positioning pin of the rear bracket of the seat cushion to pass through the positioning hole of the rear bracket of the seat cushion and the seat cushion The assembly hole on the rear bracket realizes the positioning and compression of the rear bracket of the seat cushion, and at the same time, the pressing force of the rear bracket of the seat cushion by the positioning plate of the rear bracket of the seat cushion is transmitted to the tailpipe to realize the compression of the tailpipe; The lower end of the rear armrest lug is attached to the corresponding installation position on the tail pipe, and the positioning pin of the rear armrest lug is inserted into the positioning hole of the rear armrest lug and the lug hole on the rear armrest lug to realize the positioning of the rear armrest lug; The upper end of the installation lug fits with the corresponding installation position on the tail pipe, and the ear hole at the lower end of the tail cover installation lug is inserted into the positioning boss of the tail cover installation lug to realize the positioning of the tail cover installation lug; The front lower end of the tail cap bracket is fitted and abutted against the corresponding installation position on the upper part of the rear end of the tail pipe, and the rear upper end of the tail pipe bracket is attached and supported to the upper end surface of the positioning block of the tail cap bracket, and then inserted into the tail cap bracket by the positioning pin of the tail cap bracket The assembly hole of the tail cover bracket and the positioning hole of the tail cover bracket are used to realize the positioning of the tail cover bracket; and then the welding gun is used to realize the welding and fixing between the above positioning components at one time, that is, the components of the rear section of the frame for the scooter sample are completed. Welding fixation processing. 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 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, 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. In particular, the positioning assembly of the rear bracket of the trunk and the positioning assembly of the rear bracket of the seat cushion are both designed as a clamping structure with a push-down limit and locking positioning, which can rely on the downward pressure of the positioning assembly of the rear bracket of the trunk on the rear bracket of the trunk Simultaneously realize the compression of the rear section of the upper beam tube, and realize the compression of the tail pipe at the same time by relying on the downforce of the seat cushion rear bracket positioning component on the seat cushion rear bracket, so that the simple structure improves the reliability of the overall clamping It improves the clamping efficiency and ensures the welding accuracy of subsequent welding.

To sum up, the above fixture can simplify the welding and assembly process, has the advantages of simple operation, low cost, and can facilitate the trial production and adjustment of scooter samples.

Claims (6)

1. the anterior segment structure processing method of a kind of scooter sample vehicle frame, it is characterised in that first using weld jig completion pair Clamping is fixed between head tube and lower beam pipe front waist section, ignition switch lock support, meter housing support and several persons of direction closing piece, is adopted Completed to being welded and fixed between above-mentioned component, then disassembled for realizing to ignition switch lock support and meter housing with welding gun Support realizes the positioning component of Set and Positioning to avoid interference with, then is installed in weld jig for realizing to radiator grille installation Pipe and radiator grille install the positioning component that journal stirrup realizes Set and Positioning, realize and install journal stirrup to radiator grille installing pipe and radiator grille Set and Positioning, is then completed between radiator grille installing pipe and head tube and radiator grille installing pipe and radiator grille using welding gun again Welding between journal stirrup is installed；Complete to be welded and fixed processing to the anterior segment structure of scooter sample vehicle frame；

The weld jig includes upper surface and all side surfaces and the three-dimensional of some mounting holes is disposed with according to constant spacing array Mounting platform, in addition to for realizing the head tube positioning component of head tube positioning, ignition switch lock support being determined for realizing Position firing switch lock support positioning component, for realize to meter housing support position meter housing support positioning component, be used for Realize the radiator grille installing pipe positioning component positioned to radiator grille installing pipe, radiator grille installed before journal stirrup positioning for realizing Mask installs journal stirrup positioning component, for realizing the direction closing piece positioning component of direction closing piece positioning and for realizing to lower beam pipe The lower beam pipe front waist section positioning component of front waist section positioning；

Standard square chest, the headstock are used in the head tube positioning that the head tube positioning component includes the rectangular body structure of an entirety With standard square chest, respectively side is upper according to the spacing and array of apertures cloth consistent with the mounting hole on three-dimensional mounting platform for pipe positioning Some mounting holes are equipped with, head tube positioning standard square chest is by being bolted to leading flank medium position on three-dimensional mounting platform； The head tube positioning is fixedly installed a head tube positioning standard angle device with standard square chest upper end, and the head tube is determined Position standard angle device includes each fixed block and moving block with a hinged end and a folding end, fixed block and rotation The hinged end of block is rotatably hinged and the rotational angle alignment pin for realizing rotational angle positioning is provided with hinged place, described Fixed block be disposed with moving block according to the spacing and array of apertures consistent with the mounting hole on three-dimensional mounting platform it is some Mounting hole, the head tube positioning is arranged forward with the fixed block folding end of standard angle device and is horizontally fixed on headstock by bolt Pipe positioning standard square chest upper end, the head tube positioning is fixedly installed upwards with the moving block upper surface middle part of standard angle device There are head tube positioning round table, the head tube positioning round table diameter and the matching of head tube lower end external diameter and head tube positioning round table axle At the heart it is coaxial on be provided with headstock bore match head tube locating dowel；

The firing switch lock support positioning component includes the ignition switch lock support positioning of an entirety structure in a rectangular trapezoid With support angle, each side of the ignition switch lock support positioning support angle it is upper according to on three-dimensional mounting platform The consistent spacing of mounting hole and array of apertures are disposed with some mounting holes, ignition switch lock support positioning support angle bottom table Fit and by being bolted to the moving block upper surface upper position of head tube positioning standard angle device, firing switch lock branch in face Frame positioning is right-angle surface with support angle trailing flank and is set in parallel in head tube locating dowel anterior position, ignition switch lock support Positioning is fixedly installed a firing switch lock support positioning block, the positioning of ignition switch lock support with support angle trailing flank top Block rear end extands rearward to head tube locating dowel upper right face position and is correspondingly arranged on firing switch lock rack positioning hole, point Ignition switch lock support alignment pin is combined with fiery switch lock rack positioning hole, ignition switch lock support alignment pin is used for insertion point Pilot hole and firing switch lock rack positioning hole on fire switch lock support realize the positioning to ignition switch lock support.

2. the anterior segment structure processing method of scooter sample vehicle frame as claimed in claim 1, it is characterised in that the instrument Shell support positioning component is located by connecting block including a meter housing support, and the meter housing support block front end that is located by connecting is fixed by bolt In the positioning of ignition switch lock support with support angle upper surface, the meter housing support block rear end lower surface that is located by connecting is fixedly installed There is meter housing support positioning block, meter housing support positioning block is right on the outside of the trailing flank of head tube locating dowel top with extending downwardly into Answer and be correspondingly arranged on meter housing rack positioning hole on the meter housing support location division of position, meter housing support location division and be combined with Meter housing support alignment pin, the meter housing support alignment pin is used to insert on meter housing rack positioning hole and meter housing support Pilot hole realizes the positioning to meter housing support.

3. the anterior segment structure processing method of scooter sample vehicle frame as claimed in claim 1, it is characterised in that before described Cover installing pipe positioning component is included on a radiator grille installing pipe support angle, each side of radiator grille installing pipe support angle Some mounting holes are disposed with according to the spacing and array of apertures consistent with the mounting hole on three-dimensional mounting platform, radiator grille is installed Piping support angle bar has a vertically arranged right flank and right flank bottom is fitted and is fixedly connected on the headstock by bolt On left surface of the pipe positioning with the moving block of standard angle device, radiator grille installing pipe support angle upper surface is fixedly installed one piece Radiator grille installing pipe location-plate, radiator grille installing pipe location-plate left side is by being bolted in radiator grille installing pipe support angle Surface and right side extend right up to top in the middle part of the moving block of head tube positioning standard angle device, the positioning of radiator grille installing pipe Plate is set and in radiator grille installing pipe location-plate upper surface parallel to head tube positioning with the moving block upper surface of standard angle device Rear position is fixedly installed a radiator grille installing pipe locating piece, radiator grille installing pipe locating piece upper surface forward downward Angularly disposed to have radiator grille installing pipe locating slot, it is fixed that radiator grille installing pipe locating slot falls into realization for radiator grille installing pipe front waist section Position.

4. the anterior segment structure processing method of scooter sample vehicle frame as claimed in claim 3, it is characterised in that before described Cover installs journal stirrup positioning component and is fixed on radiator grille installing pipe location-plate upper surface forward position and just to radiator grille including one The radiator grille that installing pipe locating slot is set installs journal stirrup locating piece, and it is convex rearwardly and upwardly with one that radiator grille installs journal stirrup locating piece The radiator grille risen installs journal stirrup location division, and the radiator grille, which installs journal stirrup location division trailing flank lower end, to be used for and radiator grille installing pipe Front end abutting is spacing, and radiator grille, which installs journal stirrup location division trailing flank top, to be used for and radiator grille installation journal stirrup leading flank abutting limit Position.

5. the anterior segment structure processing method of scooter sample vehicle frame as claimed in claim 1, it is characterised in that the direction Closing piece positioning component includes being fixed on before the head tube positioning round table of the moving block upper surface of head tube positioning standard angle device The direction closing piece locating piece that orientation is put, direction closing piece locating piece is just correspondingly arranged on direction closing piece to head tube positioning round table side Locating slot, direction closing piece locating slot falls into closing piece front end for supplier and realizes that abutting is spacing.

6. the anterior segment structure processing method of scooter sample vehicle frame as claimed in claim 1, it is characterised in that the underbeam Pipe front waist section positioning component includes being fixedly installed on a lower beam pipe front portion on head tube positioning standard square chest trailing flank top Section locating piece, each correspondence has convexed to form a lower beam pipe front waist section positioning backward for lower beam pipe front waist section locating piece left and right ends Portion, lower beam pipe front waist section location division trailing flank is correspondingly arranged on the lower beam pipe front waist section for being fallen into for lower beam pipe front waist section and realizing positioning Locating slot.