A positioning welding device for buckling a vehicle body and a chassis

Abstract

The invention discloses a positioning welding device for buckling a vehicle body and a chassis, comprising a track and a sliding positioning device; the track is a parallel track; a plurality of sliding positioning devices are arranged on the track; the sliding positioning device comprises a sliding chassis, a positioning frame mounted on a rotating shaft and a telescopic positioning pin; the sliding chassis is arranged on the track; a track wheel set is arranged at the lower part of the sliding chassis to roll on the track; a chassis crossbeam is arranged at the upper part of the sliding chassis; a chassis limit pin hole is arranged on the chassis crossbeam; the positioning frame mounted on the rotating shaft is arranged on the sliding chassis across the track and rotates relative to the sliding chassis; the positioning frame mounted on the rotating shaft is provided with positioning feet at both ends of the track; a telescopic positioning pin is arranged at the upper end of the positioning foot; and a sliding limit device is arranged on the side of the track. In this case, the chassis is accurately positioned on the light rail track, and the flexible sliding is used to realize the accurate positioning and free adjustment of the chassis and vehicle body welding buckle, thereby improving work efficiency, reducing labor intensity, and convenient operation greatly reduces investment costs.

Description

Technical Field

[0001] The invention relates to a positioning welding device for positioning and buckling a vehicle body and a chassis. Background Art

[0002] When the chassis module and the body module are buckled together, the straightness, flatness and wheelbase position of the front and rear modules of the chassis have dimensional requirements. The front and rear modules of the chassis use rails to locate the straightness and flatness of the front and rear modules. The positioning device on the rail is quickly and reliably positioned in the positioning hole on the auxiliary surface under the main beam of the module frame. There will be problems such as slipping and deformation, derailment and instability, and the front and rear modules are not synchronized with the rail. Summary of the invention

[0003] The purpose of the present invention is to provide a chassis precise positioning structure on the light rail track, and a flexible sliding device for body buckling to achieve precise positioning and free adjustment of the chassis and body welding buckling, thereby achieving the chassis positioning and body buckling accuracy, improving work efficiency, reducing labor intensity, and convenient operation greatly reducing investment costs.

[0004] The technical scheme of the present invention is: a positioning welding device for buckling a vehicle body and a chassis, comprising a track and a sliding positioning device; the track is a parallel track; a plurality of sliding positioning devices are arranged on the track; the sliding positioning device comprises a sliding chassis, a positioning frame mounted on a rotating shaft and a telescopic positioning pin; the sliding chassis is arranged on the track; a track wheel set is arranged at the lower part of the sliding chassis to roll on the track; a chassis crossbeam is arranged at the upper part of the sliding chassis; a chassis limit pin hole is arranged on the chassis crossbeam; the positioning frame mounted on the rotating shaft spans The track is arranged on the sliding base frame and rotates relative to the sliding base frame; a rotation limit pin connecting plate is arranged at the lower part of the positioning frame mounted on the rotating shaft; a rotation limit pin hole is arranged on the rotation limit pin connecting plate; the base frame limit pin hole and the rotation limit pin hole cooperate with the limit pin to limit the rotation of the positioning frame mounted on the rotating shaft; positioning legs are arranged at both ends of the positioning frame mounted on the rotating shaft close to the track; a telescopic positioning pin is arranged at the upper end of the positioning leg; the telescopic positioning pin telescopically slides relative to the positioning leg; a sliding limit device is arranged on the side of the track.

[0005] Preferably, the positioning frame mounted on the rotating shaft is movably connected to the sliding base frame.

[0006] Preferably, the telescopic positioning pin is arranged inside the positioning support foot; and a limiting convex edge is arranged on the outer edge of the top of the telescopic positioning pin.

[0007] Preferably, the telescopic positioning pin and the positioning support leg are limited by a pin shaft and a pin hole.

[0008] Preferably, the track is a T-wheel positioning light rail.

[0009] Preferably, an anti-derailment baffle is provided on the side of the track wheel set.

[0010] The advantages of the present invention are:

[0011] 1. The positioning structure is detachable and easy to assemble to switch the positioning of different models. It is suitable for all models of chassis positioning and body buckling;

[0012] 2. Rapid positioning and accurate positioning ensure the straightness, flatness, and wheelbase dimensional accuracy, and ensure the consistency of the key parts of the body when fitting the chassis;

[0013] 3. After the chassis body is fastened and welded, the offline device is quickly separated from the chassis to ensure the normal flow of the body line without any buckling problems;

[0014] 4. It is suitable for manual stepping remote control electric hoist operation and control. Compared with the electric control automatic trolley, it has less investment cost, avoids capital waste and reduces investment cost. It also solves the problem of chassis module positioning, fastening the body, fastening and accurate synchronization of the line body and flexible operation;

[0015] 5. The manual push cart moves in a straight line along the light rail track. The synchronous device reduces investment costs and is easy to operate. It avoids the waste of original production chassis positioning and regular investment equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 It is a schematic diagram of the main structure of a positioning welding device for buckling a vehicle body and a chassis described in this case;

[0018] Figure 2 It is a left-side structural schematic diagram of a positioning welding device for buckling a vehicle body and a chassis described in this case;

[0019] Figure 3 It is a top view structural schematic diagram of a positioning welding device for buckling a vehicle body and a chassis described in this case;

[0020] Figure 4 It is a schematic diagram of the main structure of a rotating shaft mounted positioning frame of a positioning welding device for buckling a vehicle body and a chassis described in this case;

[0021] Figure 5 It is a right side structural schematic diagram of a rotating shaft mounted positioning frame of a positioning welding device for buckling a vehicle body and a chassis described in this case;

[0022] Figure 6 It is a top view structural schematic diagram of a positioning frame mounted on a rotating shaft of a positioning welding device for buckling a vehicle body and a chassis described in this case;

[0023] Figure 7It is a schematic diagram of the main structure of the assembly chassis front module and chassis rear module of a positioning welding device for buckling a vehicle body and a chassis described in this case;

[0024] Figure 8 This is a schematic diagram of the top view of the structure of the front chassis module and the rear chassis module of the assembling chassis positioning welding device for buckling the vehicle body and the chassis described in this case. DETAILED DESCRIPTION

[0025] Example:

[0026] As attached Figure 1-8 As shown, a positioning welding device for the body and chassis to be buckled together comprises a track 1 and a sliding positioning device 2; the track 1 is a parallel track; the track is a T-shaped wheel positioning light rail to ensure the straightness and flatness requirements, and the accuracy deviation is ensured to be within the range of 1mm; a plurality of sliding positioning devices 2 are arranged on the track 1; the sliding positioning device 2 comprises a sliding base 21, a positioning frame 22 mounted on a rotating shaft and a telescopic positioning pin 3; the sliding base 21 is arranged on the track 1; a track wheel set 23 is arranged at the lower part of the sliding base 21 to roll on the track 1, driving the sliding The positioning device 2 slides on the track 1, which can ensure that the wheelbase of the chassis module with different wheelbases is stretched in the X direction; the side of the track wheel group 23 is provided with an anti-derailment baffle 24 to prevent derailment when sliding along the track; the upper part of the sliding chassis 21 is provided with a chassis crossbeam 25; the chassis crossbeam 25 is provided with a chassis limit pin hole; the positioning frame 22 mounted on the rotating shaft is arranged on the sliding chassis 21 across the track and rotates relative to the sliding chassis 21; the positioning frame 22 mounted on the rotating shaft is connected to the sliding chassis 21 with bolts and nuts, and the positioning frame 22 mounted on the rotating shaft can switch different widths The vehicle model with the size change in the Y direction controls the chassis positioning; the lower part of the positioning frame 22 mounted on the rotating shaft is provided with a rotation limit pin connecting plate 26; the rotation limit pin connecting plate 26 is provided with a rotation limit pin hole 27; the bottom frame limit pin hole and the rotation limit pin hole 27 cooperate with the limit pin 4 to limit the rotation of the positioning frame 22 mounted on the rotating shaft; the two ends of the positioning frame 22 mounted on the rotating shaft near the track are provided with positioning legs 28; the upper end of the positioning leg 28 is provided with a telescopic positioning pin 3; the telescopic positioning pin 3 is arranged inside the positioning leg 28; the top of the telescopic positioning pin 3 A limiting convex edge 31 is provided on the outer edge; the telescopic positioning pin 3 and the positioning support foot 28 are limited by a pin shaft 5 and a pin hole, and the telescopic positioning pin 3 can be replaced to control the chassis positioning for vehicles with different heights and dimensions in the Z direction; when the positioning frame 22 mounted on the rotating shaft is flipped to a vertical position, the chassis limiting pin hole 26 and the rotating limiting pin hole 28 cooperate with the limiting pin 4 to fix the positioning frame 22 mounted on the rotating shaft, and the telescopic positioning pin 3 is fixed vertically upward and inserted into the positioning hole of the chassis module; a sliding limiting mechanism is provided on the side of the track 1 to adjust the wheelbase size of the chassis vehicle.

[0027] In order to ensure quality and improve efficiency, the overall planning and construction of the chassis module positioning body buckling line is carried out to transform the current body buckling station to meet production capacity, reduce investment costs without wasting money, and simultaneously improve the chassis positioning track fast and accurate positioning method with other work production rhythms to meet the production capacity rhythm needs of the body buckling co-line process. In order to achieve a flexible and convenient control method and meet the needs of production capacity, the production plan for the remote control and hoisting of the chassis module on the track chassis module positioning buckling welding is as follows:

[0028] 1. Place the sliding positioning device on two parallel tracks. The lower part of the front module 6 of the chassis is positioned by the front and rear two sliding positioning devices 2. The lower part of the rear module 7 of the chassis is positioned by the front and rear two sliding positioning devices 2. The telescopic positioning pin 3 of the sliding positioning device 2 is vertically inserted into the positioning hole of the chassis module. According to the wheelbase of the vehicle model, the two sliding positioning devices 2 under the front module of the chassis and the two sliding positioning devices 2 under the rear module of the chassis are fixed in position by the sliding limit mechanism on the side of the track. The wheelbase of the chassis module with different wheelbases can be stretched in the X direction. The replacement of the positioning frame 22 mounted on the rotating shaft can adjust the size change in the Y direction. The replacement of the telescopic positioning pin 3 can adjust the size change in the Z direction. The positioning structure is adjusted according to the size of different vehicle models, and the straightness, flatness, and wheelbase size accuracy are quickly and accurately controlled within 1mm. The positioning structure can be disassembled and assembled to facilitate the replacement of different vehicle models and switch positioning, which is suitable for all vehicle models. Chassis positioning and body buckling;

[0029] 2. After the chassis front module 6 and chassis rear module 7 are positioned, all the gas in the airbags of the chassis front module and chassis rear module is released, and then the sliding positioning device 2 is used to position the frame stably to ensure the horizontal and straight requirements, and the tires are supported by the ground following without support;

[0030] 3. Lift the body frame assembly and snap it into place with the chassis front module 6 and chassis rear module 7 to ensure the body frame welding position, then start welding the key connection parts. After welding is complete, the airbags are quickly inflated, and the tires slightly support the frame with the ground support points. At this moment, pull out the pin shaft 5 of the telescopic positioning pin 3, so that the telescopic positioning pin 3 retracts into the positioning support foot 28 on the rotating shaft mounted positioning frame 22, and then pull out the limit pin 4 of the rotating shaft mounted positioning frame 22 so that the rotating shaft mounted positioning frame 22 is flipped 90° to the horizontal, and the sliding positioning device 2 is disengaged from the body frame chassis and moves separately. After snapping, the vehicle is transferred to the next side skin production station.

[0031] The chassis module in this case is positioned quickly and accurately. Combined with the airbag lifting range of 80mm and the completely natural state of the left and right airbags, the sliding positioning device 2 ensures that the module frame is positioned horizontally and the straightness of the front and rear modules is within the required deviation range of 1mm. After the positioning welding is complete, the airbag can be inflated to raise the frame and the rigid connection of the suspension. The support surface of the telescopic positioning pin 3 of the sliding positioning device 2 is slightly separated from the auxiliary surface of the frame. The positioning frame 22 mounted on the rotating shaft is pushed and flipped to the horizontal state. The sliding positioning device 2 is completely separated from the vehicle body frame, and a compact structure is designed in the positioning support point space to achieve the action of detaching from the vehicle frame. The flip limit structure of the positioning frame 22 mounted on the rotating shaft also realizes that the vehicle can pass through without interference within a minimum height of 200mm from the ground, and the interchangeability of the rotating movable structure is not affected, and the investment is very small.

[0032] The track can limit and ensure the horizontal and straightness requirements between the front and rear modules of the chassis. The X-direction dimension deviation is within 1mm range, which is ensured by the side sliding limit mechanism of the track;

[0033] The sliding positioning device can limit and ensure the horizontal, height and width positioning. The Y and Z direction dimension deviation is within 1mm range to ensure it by telescopic positioning pins and positioning brackets installed on the rotating shaft;

[0034] The wheelbase size of the chassis model is determined by the length and distance size deviation of the track side sliding limit mechanism, which can be adjusted in combination with the special process positioning structure of the chassis workshop to ensure technical requirements.

[0035] Therefore, there is a corresponding gap between the wheel rim and the track to compensate for the gap within the 0.5mm deviation range of the track straightness requirement. In addition, the width of the positioning device can be adjusted on the T-wheel positioning track for micro-adjustment and repair.

[0036] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A positioning welding device for buckling a vehicle body and a chassis, characterized in that: The slidable base is provided with a track and a sliding positioning device; the track is parallel to the track; a plurality of sliding positioning devices are arranged on the track; the sliding positioning device comprises a sliding base, a rotating shaft mounted positioning frame and a telescopic positioning pin; the sliding base is provided with a track wheel set at the bottom of the slide base and rolls on the track; a base crossbeam is provided on the upper part of the slide base; a base limit pin hole is provided on the base crossbeam; the positioning frame mounted on the rotating shaft is arranged on the slide base across the track and can rotate relative to the sliding base; a rotating limit pin connecting plate is provided on the lower part of the positioning frame mounted on the rotating shaft; a rotating limit pin hole is provided on the rotating limit pin connecting plate; the base limit pin hole and the rotating limit pin hole cooperate with the limit pin to limit the rotation of the positioning frame mounted on the rotating shaft; positioning feet are provided at two ends of the positioning frame mounted on the rotating shaft near the track; telescopic positioning pins are provided on the upper ends of the positioning feet; the telescopic positioning pins are telescopically slidable relative to the positioning feet; the sliding limit device is provided on the side of the track The positioning frame mounted on the rotating shaft and the sliding base frame are movably connected; The outer edge of the top of the telescopic positioning pin is provided with a limited convex edge, and the telescopic positioning pin and the positioning support leg are limited by a pin shaft and a pin hole; During welding: after the chassis front module and chassis rear module are positioned, all the gas in the airbags of the chassis front module and chassis rear module is released, and then the frame is positioned by the sliding positioning device to ensure the horizontal and straight requirements, and the tires follow the movement without support; The hoisted body frame assembly is buckled with the chassis front module and the chassis rear module to ensure the welding position of the body frame, and then the welding of key connection parts begins. After the welding is completed, the airbag is quickly inflated, and the tire slightly supports the frame with the ground support point. At this moment, the pin shaft of the telescopic locating pin is pulled out to make the telescopic locating pin retract into the locating support foot on the swivel upper mounting locating frame, and then the limit pin of the swivel upper mounting locating frame is pulled out to make the swivel upper mounting locating frame flip 90° to horizontal, and the sliding positioning device is disengaged from the body frame chassis and moved separately. After the buckling is completed, the vehicle is transferred to the next side skin production station.

2. A positioning welding device for fastening a vehicle body and a chassis according to claim 1, characterized in that: The telescopic positioning pin is arranged inside the positioning support foot.

3. A positioning welding device for fastening a vehicle body and a chassis according to claim 1, characterized in that: The track is a T-type wheel positioning light rail.

4. A positioning welding device for fastening a vehicle body and a chassis according to claim 1, characterized in that: An anti-derailment baffle is arranged on the side of the track wheel set.

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