CN107838612B

CN107838612B - Positioning mechanism for white car body welding production line

Info

Publication number: CN107838612B
Application number: CN201711126828.1A
Authority: CN
Inventors: 郑永佳; 谭秀阳; 陈少恒
Original assignee: Great Yanlong Auto Equipment Manufacturing Co ltd
Current assignee: Great Yanlong Auto Equipment Manufacturing Co ltd
Priority date: 2017-11-15
Filing date: 2017-11-15
Publication date: 2024-05-24
Anticipated expiration: 2037-11-15
Also published as: CN107838612A

Abstract

The invention discloses a positioning mechanism for a white car body welding production line, which comprises the following components: a fine positioning base; the large section parts of the motor guide rails are fixedly arranged on the upper surface of the fine positioning base; the two rows of cam guides are used for horizontally and accurately positioning, are fixedly arranged on the accurate positioning base, are parallel to the directions of the two motor guide rails and are respectively positioned at the outer sides of the two motor guide rails; and the four accurate positioning cushion blocks are used for accurately positioning the height and symmetrically and fixedly arranged at four corners of the accurate positioning base. The positioning mechanism for the white car body welding production line is a part of the flexible sliding table, when the buffer storage position is not waiting for a car type, the car type to be welded can be directly dragged to the welding position for welding, when a plurality of car types are located in the buffer storage position, and the car type to be welded cannot directly slide to the welding position, other car types can be transferred to other buffer storage positions, and a channel is opened for the car type to be welded.

Description

Positioning mechanism for white car body welding production line

Technical Field

The invention belongs to the technical field of automobile equipment manufacturing, and particularly relates to a positioning mechanism for a white automobile body welding production line, which is suitable for a multi-automobile type welding fixture.

Background

The appearance diversification of automobiles is an increasing use requirement of market consumers, and is a continuous pursuing direction of a host factory at present. The welding fixtures used in the existing white car body welding production line all belong to fixed welding modes and cannot move. Moreover, the existing white car body welding production line cannot adapt to welding jigs of different car types, and cannot meet the flexible production requirement that the welding jigs of different car types are switched on one production line at will. Therefore, there is a need for continuously improving production equipment to increase production efficiency and meet market demands for manufacturing flexibility and product diversification.

Disclosure of Invention

The invention aims at solving the technical problem that the welding production line of the white car body in the prior art cannot meet the manufacturing flexibility and product diversification, and aims to provide a positioning mechanism for the welding production line of the white car body.

The positioning mechanism for a white car body welding production line of the invention comprises:

a fine positioning base;

the large section parts of the motor guide rails are fixedly arranged on the upper surface of the fine positioning base;

the two rows of cam guides are used for horizontally and accurately positioning, are fixedly arranged on the accurate positioning base, are parallel to the directions of the two motor guide rails and are respectively positioned at the outer sides of the two motor guide rails;

And the four accurate positioning cushion blocks are used for accurately positioning the height and symmetrically and fixedly arranged at four corners of the accurate positioning base.

The cam guide device is provided with a cam guide support fixedly connected with the fine positioning base and a plurality of horizontal positioning cams fixedly arranged on the upper surface of the cam guide support.

The positioning mechanism for the white car body welding production line further comprises two rows of thick limiting assemblies, wherein the thick limiting assemblies are parallel to the directions of the two motor guide rails and are respectively positioned at two outer sides of the fine positioning base.

The coarse limiting assembly comprises a plurality of fixed feet which are arranged at intervals and coarse guide plates which are used for connecting the fixed feet in series.

The fine positioning base is provided with a plurality of parallel frame supporting beams and side plates which are respectively fixed on two sides of the frame supporting beams, the two rows of cam guides are fixedly arranged on the inner sides of the side plates, and the fine positioning cushion blocks are fixedly arranged on the outer sides of the side plates.

The cam guide has: the cam guide supports are fixedly arranged on the opposite inner sides of the side plates; and the plurality of horizontal positioning cams are fixedly arranged on the outer side surface of the cam guide support.

The precise positioning base is also provided with two parallel motor transverse short beams, a large section of each motor transverse short beam is vertically erected on the frame supporting beam, motor guide rails are respectively fixedly arranged on the outer sides of the upper surfaces of the motor transverse short beams, and a rack is fixedly arranged on the inner side of the upper surface of one motor transverse short beam.

The fine positioning base is also provided with a drag chain which is placed on the frame supporting beam and parallel to the motor guide rail.

And one side of the frame bracing beam is respectively provided with a power trolley buffer block.

And a motor sensor is further arranged on the cam guide support.

The invention has the positive progress effects that: the positioning mechanism for the white car body welding production line is a part of a flexible sliding table. When the buffer storage position does not wait for the vehicle type, the flexible sliding table for the white vehicle body welding production line can directly drag the vehicle type A to be welded to the welding position for welding, particularly when a plurality of vehicle types are positioned on the buffer storage position on the flexible sliding table and the vehicle type to be welded cannot directly slide to the welding position, other vehicle types can be transferred to other buffer storage positions, a channel is opened for the vehicle type to be welded, and the method is particularly embodied in random switching and replacement of the vehicle type to be welded.

Drawings

FIG. 1 is a schematic perspective view of a flexible slipway for a body-in-white welding production line;

fig. 2A is a schematic front perspective view of the slipway carriage 10 of the present invention;

fig. 2B is a schematic view of the reverse side perspective structure of the slipway carriage 10 of the present invention;

fig. 2C1 is a schematic perspective view of a reference-side universal slide block of the slipway carriage of the present invention;

fig. 2C2 is a schematic perspective view of an auxiliary side universal slide block of the slipway trolley according to the present invention;

fig. 2C3 is a schematic cross-sectional view of an auxiliary side gimbal block of the slipway carriage of the present invention;

fig. 3A is a schematic perspective view of the traverse table unit 20 of the present invention;

fig. 3B is a schematic perspective view of the traversing carriage support 21 of the present invention;

FIGS. 3C1 and 3C2 are schematic perspective views showing the traversing power trolley of the present invention;

FIGS. 3D1 and 3D2 are schematic perspective views of the first and second slider members according to the present invention;

FIG. 3E is a schematic perspective view of a drag mechanism according to the present invention;

FIG. 3F1 is a schematic perspective view of a wire side positioning mechanism 92 according to the present invention;

FIG. 3F2 is a schematic perspective view of a wire side positioning mechanism 92 with electrical quick-connect according to the present invention;

fig. 4A is a schematic perspective view of the corner slide unit 30 of the present invention;

fig. 4B1 and 4B2 are schematic perspective views of the steering mechanism 33 of the present invention in the front and rear directions, respectively;

FIG. 4B3 is a schematic cross-sectional view of the steering mechanism 33 according to the present invention;

fig. 5A is a schematic perspective view of an up-down line slipway unit according to the present invention;

Fig. 5B is a schematic perspective view of the upper and lower line slipway holder 41A of the present invention;

FIG. 5C1 is a schematic perspective view of a transition bracket according to the present invention;

FIG. 5C2 is a schematic perspective view of a transition support showing the interface position;

FIG. 5D is a schematic perspective view of the inner transition piece 42 of the present invention;

FIG. 5E is a schematic perspective view of a track opening mechanism according to the present invention;

Fig. 5F is a schematic perspective view of the outer transition bracket 43 according to the present invention;

FIG. 5G is a schematic perspective view of the on-off line power cart of the present invention;

Fig. 5H is a schematic perspective view of the fixing clamp of the outer transition bracket 43 according to the present invention;

FIGS. 5I1 and 5I2 are schematic perspective views of first and second slide members of an on-off line power trolley, respectively;

FIG. 5J is a schematic perspective view of a drag mechanism of the on-off line powered trolley;

fig. 5K is a schematic perspective view of the slipway trolley lock buckle 41B 1;

fig. 6A is a schematic perspective view of the up-and-down line cart 50 according to the present invention;

fig. 6B is a schematic perspective view of the positioning mechanism 52 according to the present invention;

fig. 6C is a schematic perspective view of the artificial cart 54 according to the present invention;

Fig. 6D is a schematic perspective view of a locking unit of the manual cart 54 according to the present invention;

fig. 7 is a working principle diagram of the flexible sliding table for the white car body welding production line.

Detailed Description

As shown in fig. 1, the flexible slipway for the welding production line of the white car body of the present invention comprises: a slipway trolley 10 for transporting welding jigs; the sliding table unit 20 is transversely moved, and the sliding table trolley 10 can be fixed or slide on the sliding table unit 20; the corner sliding table unit 30, one side of which is butted with one side end of the traverse sliding table unit 20; an up-down line slipway unit 40, one side end of which is butted with the other side edge of the corner slipway unit 30 and is adjacent to one side end of the traversing slipway unit 20, for feeding and/or discharging the slipway trolley onto the traversing slipway unit 20; the up-down carriage 50 may be used to up-line and/or down-line the carriage 10 to the up-down carriage unit 40.

As shown in fig. 2A and 2B, the slipway trolley 10 for the body-in-white welding production line according to the present invention is provided. The slipway carriage 10 has: a main body bracket 11, a docking assembly 12 fixed to the lower surface of the main body bracket 11, and a moving steering roller assembly 13 fixed to the lower surface of the main body bracket 11. The main body bracket 11 is in a field shape and is provided with a rectangular peripheral frame 111, a transverse bracket 112 which is positioned at the transverse and longitudinal central lines of the peripheral frame 111 and is mutually vertical, a longitudinal bracket 113 and a plurality of reinforcing rods 114 which are parallel to the transverse bracket 112 and are arranged at intervals. The docking assembly 12 has a first docking member 121 and a second docking member 122 respectively fixed to both outer ends of the lower surface of the cross bracket 112; the first butt joint part 121 is provided with a first butt joint part fixing support 1211 and is arranged at one side end of the transverse bracket 112; the second butt joint part 122 is provided with a second butt joint part fixing support 1221 which is arranged at the other side end of the transverse bracket 112; the first and second docking member holders 1211 and 1221 have respective engaging blocks 124 fixedly provided on lower surfaces thereof. The docking assembly 12 is further provided with two third docking members 123 respectively fixedly arranged at the center position and the side ends of the lower surface of the longitudinal bracket 113; the third docking member 123 is a clamping block 124. As shown in fig. 2c1 to 2c3, the movable steering roller assembly 13 has a reference side gimbal block 131 and three auxiliary side gimbal blocks 132, which are symmetrically arranged on the longitudinal frame of the peripheral frame 111 at intervals; the reference-side gimbal block 131 has a reference-side gimbal block body 1311 and a plurality of cams 1312 fixed to the lower surface of the reference-side gimbal block body 1311; auxiliary side gimbal block 132 has an auxiliary side gimbal block body 1321, an adjustable spacer 1323 fixed to the upper surface of auxiliary side gimbal block body 1321, and a plurality of cams 1322 fixed to the lower surface of auxiliary side gimbal block body 1321. The two proximal ends of the lower surface of the longitudinal support 113 of the main body support 11 are respectively provided with a guide rod fixing support 14 which is arranged oppositely, and the longitudinal support 113 is also provided with a vehicle type identifier support 15 and an electric quick connector support 16 at the side end far away from the third butting piece 123. The guide bar fixing support 14 has a guide bar fixing support body 141 and three cams 142 fixed to the lower surface of the guide bar fixing support 141 body in a delta arrangement. The lower surface of the first abutting part fixing support 1211 is provided with a vehicle type detection strip 125 at the inner side of the clamping block 124, and a cam hook 1212 at the outer side of the clamping block 124; the lower surface of the second docking member fixing support 1221 is also provided with a vehicle type detection strip 125 inside the clamping block, and a clamping cam 1222 is provided outside the clamping block 124. Two corner edges of one end of the peripheral frame 111 are provided with locking blocks 17.

As shown in fig. 3A, the traverse slide unit 20 according to the present invention includes: the device comprises a groove type transverse sliding table support 21, a pair of transverse sliding table guide rails 22, two motor guide rails 23, a transverse sliding power trolley 24 and a rack 81.

As shown in fig. 3B, the transverse sliding table support 21 has two bottom long cross bars 211 disposed in parallel at intervals, and two upper long cross bars 212 corresponding to the two bottom long cross bars 211 and disposed in parallel, the upper surfaces of the two upper long cross bars 212 are fixedly connected with the transverse sliding table guide rails 22 respectively, the upper long cross bars 212 are fixedly connected with the bottom long cross bars 211 on the same side through a plurality of reinforcing rods 213, the two bottom long cross bars 211 are connected by a plurality of transverse moving bottom beams 214, two motor transverse moving long beams 215 disposed in parallel at intervals are vertically supported on the plurality of transverse moving bottom beams 214, a rack 81 is disposed on the upper surface of one side of one motor transverse moving long beam 215 far from the upper long cross bar 212, the rack 81 is parallel to the motor guide rails 23, and the rack 81 is meshed with a gear 245 of the transverse moving power trolley 25. The slot of the traversing slipway bracket 21 is also provided with a drag chain 26 which is arranged on a plurality of traversing bottom beams 214 and is parallel to the two bottom long cross bars 211. Wall plates 216 are sandwiched between the reinforcing rods 213.

A pair of traverse slide rails 22 are respectively fixed on the upper surfaces of two upper long rails 212 on both sides of the traverse slide bracket 21, and the slide carriage 10 can be fixed or slid on the traverse slide rails 22. Two motor guide rails 23 are parallel to the traverse slide guide rail 22, and motor traverse long beams 215 fixed to the groove bottom of the traverse slide bracket 20 are on the side upper surfaces close to the upper long rail 212.

The traversing power trolley 24 can be used for driving the slipway trolley 10, is positioned in a groove of the traversing slipway bracket 20, and slides on two motor guide rails 23 of the traversing slipway unit 20. As shown in fig. 3C1 and 3C2, the traversing power trolley 24 has a power trolley bracket 241, a trolley support 243, a motor 244, a gear 245, and two drag mechanisms 246. A first sliding block piece 242a is symmetrically fixed on two sides of one end of the lower part of the power trolley bracket 241, a second sliding block piece 242b is symmetrically fixed on two sides of the other end of the power trolley bracket 241, as shown in fig. 3D1 and 3D2, the first sliding block piece 242a and the second sliding block piece 242b are provided with a lower sliding block base 2421 detachably fixed on the power trolley bracket 241, two plane cams 2422 and a side cam 2423 which are fixed on the sliding block base 2421, and a C-shaped auxiliary clamping block 2424, the two plane cams 2422 respectively support against the upper surface and the lower surface of the motor guide rail 23 in a rolling way, and the side cams 2423 support against the side surfaces of the motor guide rail 23 in a rolling way; the C-shaped auxiliary block 2424 is fixed on the slider base 2421, and the C-shaped auxiliary block 2424 has a U-shaped opening and is clamped with the motor guide rail 23. The trolley support 243 is fixedly arranged on the power trolley bracket 241; the motor 244 is fixedly arranged at the middle position of one end of the trolley support 243; the gear 245 is fixedly arranged below the trolley support 243 and is driven by the motor 244; the two dragging mechanisms 246 can hook the butt joint assembly 12 on the lower surface of the main body support 11 of the sliding table trolley 10, and the dragging mechanisms 246 are respectively positioned at the front end and the rear end of the power trolley support 241. As shown in fig. 3E, the drag mechanism 246 has: at least one cylinder 2461, the bottom of which is fixed on the power trolley support 241; the U-shaped clamping groove block 2462 is fixedly connected with the push rod of the air cylinder 2461 at the lower part, and the U-shaped notch 2462a at the upper part can be clamped with the clamping block 124 of the docking assembly 12 of the sliding table trolley 10; two side fixing pieces 2463 symmetrically positioned on two sides of the air cylinder 2461, the bottom ends of the two side fixing pieces are fixed on the power trolley bracket 241, the upper side ends of the two side fixing pieces are respectively movably connected with the side ends of the clamping groove blocks 2462 up and down, and the air cylinder 2461 is used for stopping the clamping groove blocks 2462 from further rising when the clamping groove blocks 2462 are ventilated and lifted to a certain degree; the connecting cushion block 2464 and the positioning sensor 2465 are connected with the connecting cushion block 2464 fixedly connected to the push rod of the air cylinder 2461 and positioned below the U-shaped clamping groove block 2462; the positioning sensor 2465 is fixedly arranged on the side surface of the connecting cushion block 2464 at the lower end, and the upper end is right opposite to the U-shaped notch 2462a of the clamping groove block 2462, so as to detect whether the clamping block 124 of the sliding table trolley 10 is clamped in the U-shaped notch 2462a or not. The gear 245 is engaged with the rack 81 to drive the traversing carriage 24 back and forth in the slot of the traversing carriage support 21 by the motor 244. A drag chain hook 2411 for hooking the drag chain 26 is arranged at the middle position of one side of the power trolley bracket 241, and an induction detection block 2412 is arranged at the outer side of the sliding block piece.

A plurality of power trolley inductors 91 for detecting the in-place movement of the traverse power trolley 24 are sequentially arranged at intervals at the bottom of the traverse sliding table support 21. The periphery of the traverse slipway support 21 is also provided with a plurality of side positioning mechanisms 92 (shown in fig. 3F 1) and a line side positioning mechanism 92 (shown in fig. 3F 2) with electric quick plug in at the middle part at intervals. The slot side ends of the traverse slipway support 21 are each provided with a power trolley buffer block 93 (see fig. 4A). A plurality of adjusting feet 94 are arranged at intervals at the outer bottoms of the grooves of the transverse sliding table support.

As shown in fig. 4A, in order to provide the corner slide unit 30 of the present invention, two corner slide units 30 are respectively connected to both side notches of the traverse slide bracket 21 of the traverse slide unit 20. The corner sliding table unit 30 is provided with a square hollow column-shaped corner sliding table support 31, and one support edge is fixedly connected with a notch on one side of the transverse sliding table support 21; four rectangular corner guide rails 32 respectively fixed on the top surface of the corner sliding table support 31, and the sliding table trolley 10 can be fixed or slid on the corner guide rails 32; and four steering mechanisms 33 which are respectively positioned at the top parts of four corners of the corner sliding table support 31 and are flush with the four corner guide rails, wherein the steering mechanisms 33 and the four corner guide rails 32 are positioned at the same height, and the rotation of the steering mechanisms 33 can enable the transverse sliding table guide rail 22 of the transverse sliding table unit 20 to be communicated with the two parallel corner guide rails 32 into a straight line.

The corner sliding table support 31 is provided with four edge seats 311, which are respectively positioned at the junction of the four corners of the corner sliding table support 31, and four steering mechanisms 33 are respectively positioned on the upper surfaces of the four edge seats 311. The corner slide mount 31 includes: the two parallel bottom short cross bars 312, two bottom short longitudinal bars 313 which are enclosed by the two bottom short cross bars 312 into a rectangle, two upper short cross bars 314 which are parallel to the two bottom short cross bars 312, and two upper short longitudinal bars 315 which are enclosed by the two upper short cross bars 314 into a rectangle, the four edge seats 311 are respectively positioned at the vertical junction of the bottom short cross bars 312 and the bottom short longitudinal bars 313, the two bottom short cross bars 312 are positioned on the extension lines of the two bottom long cross bars 211 of the transverse sliding table support 21, and the edge seats 311 are clamped between the two bottom short cross bars 211; the upper surfaces of the two upper short cross bars 314 and the two upper short longitudinal bars 315 are respectively fixedly provided with a corner guide rail 32, the two upper short cross bars 314 are positioned on the extension lines of the two upper long cross bars 212 of the transverse sliding table support 21, and a steering mechanism 33 is arranged between the two upper short cross bars; the upper short cross bars 314 and the corresponding bottom short cross bars 312, and the upper short side bars 315 and the corresponding bottom short side bars 313 are also fixedly coupled by a plurality of reinforcement bars 316. Side wall panels 317 are provided between adjacent reinforcing bars 316.

As shown in fig. 4b1 to 4b3, the steering mechanism 33 has a steering fixing base 331, a slider 332 slidably disposed in the steering fixing base 331 and a cylinder 333 driving the slider 332 to rotate, and is fixed on the edge seat 311 of the corner sliding table bracket 31. The surface of the sliding block 332 is fixedly provided with a steering guide rail 334, and the cylinder 333 rotates the sliding block 332 to enable the steering guide rail 334 to communicate the traversing slide rail 22 of the traversing slide unit 20 with the corner guide rail 32 on the upper surface of the upper short transverse rod 314 into a straight line, or to communicate the upper and lower line slide rail 44 of the upper and lower line slide unit 40 with the corner guide rail 32 on the upper surface of the upper short longitudinal rod 315 into a straight line.

The corner slide table bracket 31 is provided with two power trolley buffer blocks 93 on the side wall plate facing the traverse slide table unit 20. The bottom periphery of the corner slipway bracket 31 is provided with a plurality of adjusting feet 94. The corner slipway unit 30 is provided with a slipway trolley buffer 95 at the outer side of the corner slipway support 31 far away from and facing the up-down line slipway unit 40. The outer side of the corner slipway bracket 31 of the line slipway unit 40 is provided with a line side positioning mechanism 92.

As shown in fig. 5A, the up-down line slipway unit 40 includes: the device comprises a slot type upper and lower line sliding table support 41A, a slot type buffer sliding table support 41B, a slot type inner transition support 42, a slot type outer transition support 43, an upper and lower line sliding table guide rail 44, a pair of inner transition guide rails 45, a pair of outer transition guide rails 46, a pair of openable guide rail groups 47, an upper and lower line power trolley 48 and two parallel motor guide rails 49 which are spaced.

The notch on one side of the up-down line slipway support 41A is fixedly connected with the other support side of the corner slipway support 31, so that the up-down line slipway support 41A is spatially perpendicular to the traversing slipway support 21. The notch at the other side of the upper and lower line sliding table support 41A is in butt joint with the notch at one side of the inner transition support 42 in a straight line form to form a first interface 420a and a second interface 420b (as shown in fig. 5C 2); the notch at the other side of the inner transition support 42 is in butt joint with the notch at one side of the buffer slipway support 41B in a straight line form to form another first interface 420a and another second interface 420B; the linear form is butted to enable the groove of the upper and lower line sliding table support 41A, the groove of the inner transition support 42 and the groove of the buffer sliding table support 41B to form a communicable linear groove 401.

As shown in fig. 5B, the upper and lower line sliding table support 41A and the buffer sliding table support 41B are provided with two long bottom longitudinal bars 411 arranged in parallel and two long upper longitudinal bars 412 corresponding to the two long bottom longitudinal bars 411 and arranged in parallel, two short bottom longitudinal bars 313 of the corner sliding table support 31 are positioned on the extension line of the long bottom longitudinal bars 411, two short upper longitudinal bars 315 are positioned on the extension line of the long upper longitudinal bars 412, and a rib seat 311 is arranged between the two short upper longitudinal bars 315; the upper surfaces of the two upper long vertical rods 412 are fixedly connected with an upper line and lower line sliding table guide rail 44 respectively, and the rotary steering mechanism 33 can enable the upper line and lower line sliding table guide rail 44 of the upper line and lower line sliding table unit 40 to be communicated with the other two parallel corner guide rails 32 of the corner sliding table unit 30 into a straight line. The upper long longitudinal rods 412 are connected with the bottom long longitudinal rods 411 on the same side in a reinforcing way through a plurality of reinforcing rods 413, wall plates are clamped between the reinforcing rods 413, the two bottom long longitudinal rods 411 are connected through a plurality of upper and lower line bottom beams 414, two parallel and alternate motor longitudinal moving long beams 415 are vertically arranged on the upper and lower line bottom beams 414, motor guide rails 49 are arranged on the upper surface of the side, close to the upper long longitudinal rods 412, of the motor longitudinal moving long beams 415, racks 81 are arranged on the upper surface of the side, far away from the upper long longitudinal rods, of one motor longitudinal moving long beam 415, and the racks 81 are meshed with gears of the upper and lower line power trolley 48.

As shown in fig. 5C1, the transition support includes an inner transition support 42 and an outer transition support 43.

As shown in fig. 5D, the inner transition support 42 includes two parallel and spaced inner transition bottom short longitudinal bars 421, and the inner transition bottom short longitudinal bars 421 are located between the bottom long longitudinal bars 411 of the upper and lower line slipway support 41A and the bottom long longitudinal bars 411 of the buffer slipway support 41B; the inner transition support 42 further includes two inner transition upper short longitudinal bars 422 corresponding to and spaced apart from the two inner transition bottom short longitudinal bars 421, and the inner transition upper short longitudinal bars 422 are located between the upper long longitudinal bars 412 of the upper and lower line slipway supports 41A and the upper long longitudinal bars 412 of the buffer slipway supports 41B; the two inner transition bottom short longitudinal rods 421 are respectively in butt joint with the two bottom long longitudinal rods 411 of the upper and lower line sliding table support 41A and the buffer sliding table support 41B in a linear mode, and the two inner transition upper short longitudinal rods 422 are in butt joint with the two upper long longitudinal rods 412 of the upper and lower line sliding table support 41A and the buffer sliding table support 41B in a linear mode; thus forming a first interface 420a and a second interface 420b. The inner transition bottom short longitudinal rods 421 are in reinforced connection with the corresponding inner transition upper short longitudinal rods 422 through a plurality of reinforcing rods 424, a plurality of upper and lower line bottom beams 414 are arranged between the two inner transition bottom short longitudinal rods 421 for reinforced connection, and a motor longitudinal moving long beam 415 extending from the upper and lower line sliding table support 41A is vertically arranged on the plurality of upper and lower line bottom beams 414 of the inner transition support 42; an inner transition guide rail 45 is fixedly arranged on the inner transition upper short longitudinal rod 422. The inner transition support 42 further includes two rail opening mechanisms 423 connected to both ends of the two inner transition bottom short longitudinal bars 421 and the two inner transition upper short longitudinal bars 422. As shown in fig. 5E, each rail opening mechanism 423 has: two opening mechanism bases 4231, which are respectively positioned at the bottoms of the first interface 420a and the second interface 420B, namely, the two opening mechanism bases 4231 respectively fixedly connect the edge end of the notch of the buffer sliding table support 41B, the edge end of the notch of the upper and lower line sliding table support 41A and the edge end of the notch of the inner transition support 42; two protruding rods 4232 which are respectively connected to the upper ends of the two opening mechanism bases 4231 and are arranged opposite to each other, and vertically intercept the grooves of the buffer slipway support 41A and the upper and lower line slipway support 41B from the grooves of the inner transition support 42; the cylinder 4233 is fixedly connected to one of the two protruding rods 4232. The rail opening mechanisms 423 are respectively and fixedly provided with an openable guide rail group 47, one end of the openable guide rail group 47 is fixedly connected to the opening mechanism base 4231 at the first interface 420a, and the other end is fixedly connected to the opening mechanism base 4231 at the second interface 420b. The openable and closable guide rail group 47 includes: two outer guide rails 471 fixed to the two protruding rods 4232, respectively, and a movable middle guide rail 472 located between the two outer guide rails 471, the middle guide rail 472 being connected to the push rod of the air cylinder 4233. When the openable guide rail group 47 is in a closed state, the openable guide rail group 47 and the outer transition guide rail 46 are connected into a straight line, so that the sliding table trolley 10 can be threaded on and threaded off between the outer transition support 43 and the inner transition support 42; when the openable and closable guide rail group 47 is opened, the upper and lower line slide rail 44 and the inner transition rail 45 are connected in a straight line, so that the slide carriage 10 can be threaded up and down among the inner transition bracket 42, the upper and lower line slide bracket 41A and the buffer slide bracket 41B. The upper surface of the opening mechanism base 4231 of the rail opening mechanism 423 is provided with a steering mechanism 33, and as shown in fig. 4b1 to 4b3, the steering mechanism 33 has a steering fixing base 331, a slider 332 fixed on the upper surface of the opening mechanism base 4231 and slidably disposed in the steering fixing base 331, and a cylinder 333 for driving the slider 332 to rotate. The surface of the sliding block 332 is fixedly provided with a steering guide rail 334, and the air cylinder 333 rotates the sliding block 332 to enable the steering guide rail 334 to communicate the upper and lower line sliding table guide rail 44 of the upper and lower line sliding table unit 40 with the inner transition guide rail 45 on the upper surface of the upper short longitudinal rod 422 into a straight line, or to communicate the openable guide rail group 47 with the outer transition guide rail 46 on the upper surface of the outer transition bracket 43 into a straight line.

As shown in fig. 5F, the outer transition bracket 43 has two outer transition bottom short crossbars 431 spaced apart in parallel and two outer transition upper short crossbars 432 spaced apart in parallel corresponding to the outer transition bottom short crossbars 431; one side ends of the two outer transition bottom short crossbars 431 are respectively butted with two side ends of one inner transition bottom short longitudinal rod 421 of the inner transition support 42 in a vertical mode, namely vertically butted at the first interface 420a, and one side ends of the two outer transition upper short crossbars 432 are respectively butted with two side ends of the inner transition upper short longitudinal rod 422 of the corresponding inner transition support 42 in a vertical mode; the outer transition bottom short cross bars 431 are connected with the corresponding outer transition upper short cross bars 432 in a reinforcing way through a plurality of reinforcing rods 433, and a plurality of outer transition bottom beams 434 are arranged between the two outer transition bottom short cross bars 431 in a reinforcing way; an outer transition rail 46 is fixedly secured to each of the outer transition upper short rails 432. The steering mechanism 33 has a steering holder 331, a slider 332 slidably disposed in the steering holder 331, and a cylinder 333 for driving the slider 332 to rotate, which are fixed to the shedding mechanism base 4231. The surface of the sliding block 332 is fixedly provided with a steering guide rail 334, and the air cylinder 333 can rotate the sliding block 332 to enable the steering guide rail 334 to connect the upper and lower line sliding guide rail 44 and the inner transition guide rail 45 into a flush line, and enable the openable guide rail group 47 and the outer transition guide rail 46 to be connected into a flush line. As shown in fig. 5G, the outer transition bracket 43 further includes a fixing clamp 435 fixed to the inner side wall of the groove of the outer transition bracket 43, i.e., the wall plate between the reinforcing bars 433. The fixing clamp 435 has: a clamping base 4351, a hook arm 4352, and an air cylinder 4353. The clamping base 4351 is fixed on the inner side wall of the groove of the outer transition bracket 43; the hook arm 4352 is pivoted on one end of the clamping base 4351; the cylinder 4353 is fixed on the other end of the clamping base 4351, and the push rod of the cylinder 4353 is fixedly connected to the hook arm 4352.

As shown in fig. 5H, the up-and-down line power trolley 48 is located at the bottom of the communicable linear groove 401 and is slidably provided between the motor rails 49 in the communicable linear groove 401. The up-and-down line power cart 48 has: the up-down line trolley support 481, the motor 482, the gear 483, the first and second slider members 484a, 484b and the drag mechanism 485. The motor 482 is fixedly arranged at the middle position of one end of the trolley support 481. A gear 483 is fixed to the up-down line carriage support 481 and is driven by a motor 482. As shown in fig. 5I1 and 5I2, each of the two first and second slider members 484a, 484b has: the slider bases 4841 detachably fixed at four corners of the lower portion of the up-down wire cart support 481, respectively; two plane cams 4842a and one side cam 4842b are fixed on the slider base 4841, respectively, the two plane cams 4842a are rollably abutted against the upper and lower surfaces of the motor guide rail 49 in the communicable linear groove 401, respectively, and the side cam 4842b is rollably abutted against the side surface of the motor guide rail 49 in the communicable linear groove 401; the C-shaped auxiliary clamping block 4843 is fixed on the slider base 4841, and the C-shaped auxiliary clamping block 4843 is provided with a U-shaped opening and is clamped with the motor guide rail 49 in the communicable linear groove 401. The drag mechanism 485 is located on the upper surface of the side of the up-down line trolley support 481 away from the motor 482, and can hook the docking assembly 12 on the lower surface of the main body bracket 11 of the slipway trolley 10. As shown in fig. 5J, the drag mechanism 485 has: at least a cylinder 4851, the bottom of which is fixed to the up-down line carriage support 481; u-shaped clamping groove block 4852, the lower part is fixedly connected with the push rod of cylinder 4851, U-shaped notch 48521 on the upper part can be clamped with clamping block 124 of docking assembly 12 of slipway trolley 10; two side fixing members 4853 are symmetrically located at two sides of the air cylinder 4851, the bottom ends of the two side fixing members are fixed on the upper line trolley support 481, the upper side ends of the two side fixing members are respectively connected with the side ends of the clamping groove blocks 4852 in an up-down movable mode, and the air cylinder 4851 is used for preventing the clamping groove blocks 4852 from further rising when the clamping groove blocks 4852 are lifted to a certain extent through ventilation. The dragging mechanism 485 also comprises a connecting cushion block 4854 and a positioning sensor 4855, wherein the connecting cushion block 4854 is fixedly connected to a push rod of the air cylinder 4851 and is positioned below the U-shaped clamping groove block 4852; the lower end of the positioning sensor 4855 is fixedly arranged on the side surface of the connecting cushion block 4854, and the upper end of the positioning sensor is right opposite to the U-shaped notch of the clamping groove block 4852, so as to detect whether the clamping block 124 of the sliding table trolley 10 is clamped in the U-shaped notch or not. A drag chain hook 486 is arranged at the middle position of the other end of the up-down line trolley support 481, which is far away from the motor 482. The up-down carriage support 481 is provided with an induction detection block 484c outside the first and second slider members 484a, 484 b.

A rack 81 is also provided in parallel in the communicable linear slot 401 at a distance from the motor rail 49, the rack 81 meshing with a gear 483 to drive the up-and-down line power trolley 48 to move back and forth in the communicable linear slot 401 by a motor 482. The bottom in the straight line groove 401 which can be communicated is also provided with a drag chain 402, one end of the drag chain 402 is hung on a drag chain hook 486 at the middle position of the other end of the upper and lower line trolley support 481, which is far away from the motor 482. A plurality of power trolley inductors 91 for detecting the in-place movement of the up-and-down line power trolley 48 are sequentially arranged at the bottom of the communicable linear groove 401 at intervals; the bottom of the slot of the outer transition bracket 43 is also provided with a plurality of power trolley sensors 91 for in-place detection of the on-line and off-line power trolley. The power trolley buffer blocks 93 are arranged at the side ends of the notch far away from the inner transition support 42 in the grooves of the upper and lower line slipway 41A and the buffer slipway support 41B. The side of the inner transition support 42 remote from the outer transition support 43 is provided with a slipway trolley buffer block (not shown). The buffer slide table support 41B is provided with a slide table trolley buffer block 95 and a slide table trolley lock catch 41B1 (as shown in fig. 5K) on the surface of the slot edge far away from the slot end of the inner transition support 42, and the lock catch 41B1 is used for locking two corner edges at one end of the peripheral frame 111 and is provided with locking blocks 17. The bottoms of the groove edges of the upper and lower line sliding table support 41A, the buffer sliding table support 41B, the inner transition support 42 and the outer transition support 43 are provided with a plurality of adjusting feet 94 at intervals. The outside surface of the groove side of the upper and lower line slide table holder 41A is provided with a valve island (not shown). The outside of the groove of the inner transition bracket 42 is provided with a vehicle type detection sensor 97.

As shown in fig. 6A, the up-and-down carriage 50 includes a positioning mechanism 52 and a manual carriage 54.

As shown in fig. 6B, the positioning mechanism 52 has a fine positioning base 521, a motor rail 522, two rows of cam guides 523, four fine positioning pads 525, two rows of coarse positioning blocks 526 (see fig. 6C), a rack 527, and a drag chain 528. The precise positioning base 521 is opposite to the bottom of the notch on the other side fixedly connected to the outer transition bracket 43. The fine positioning base 521 has: a plurality of parallel spaced frame struts 5211 spaced parallel to the outer transition bottom beams 434 of the outer transition brackets 43; side plates 5212 respectively fixed to both sides of the frame struts 5211; the motor transverse short beam 5213, a large section of the motor transverse short beam 5213 is vertically erected on the frame supporting beam 5211; the rack 527 is fixedly arranged on the inner side of the upper surface of one of the motor traversing short beams 5213. The two motor guide rails 522 are parallel to each other, the large section is fixedly arranged on the motor transverse short beam 5213 of the frame supporting beam 5211 of the fine positioning base 521, and the small section is fixedly inserted on the outer transition bottom beam 434 in the groove of the outer transition bracket 43. Two rows of cam guides 523 for horizontal accurate positioning, fixed on the opposite inner sides of the side plates 5212 on the accurate positioning base 521, parallel to the directions of the two motor guide rails 522 and respectively positioned on the outer sides of the two motor guide rails 522; the cam guide 523 has a cam guide support 5231 fixed to the opposite inner side of the side plate 5212 of the fine positioning base 521, a plurality of horizontal positioning cams 5232 fixed to the outer side surface of the cam guide support 5231, and a motor sensor 5233 fixed to the cam guide support 5231. At least four fine positioning cushion blocks 525 for accurate positioning are symmetrically fixed on four corners of the fine positioning base 521, namely, opposite outer sides of the side plate 5212. Two rows of coarse limiting assemblies 526, which are parallel to the directions of the two motor guide rails 522 and are respectively positioned at two outer sides of the fine positioning base 521, and the frame 541 can run between the fine positioning base 521 and the coarse limiting assemblies 526. The coarse limiting assembly 526 includes a plurality of fixed legs 5261 disposed at intervals and a coarse guide plate 5262 connecting the plurality of fixed legs 5261 in series. The drag chain 528 is placed on the frame strut 5211 parallel to the motor rail 522. The frame strut 5211 is provided with a power car buffer 93 on one side thereof. The fine positioning base 521 also has a line side positioning mechanism 92 at a distance.

As shown in fig. 6C, the manual cart 54 has a frame 541, two access slide rails 542, two fine guide plates 543, four high and low positioning cams 544, a locking unit 545, and an up-and-down line power cart (not shown).

The frame 541 is similar to a U-shape that can travel to the periphery of the fine positioning base 521, with the open side of the U being able to interface with the other side slot of the outer transition bracket 43. The U-shaped cross side surfaces of the frame 541 are opposite to each other and each have a cross frame 5411 with a right triangle section, the cross frame 5411 has bottom right-angle bars 5411a, inner acute-angle bars 5411b and upper acute-angle bars 5411c which are parallel to each other, the bottom right-angle bars 5411a, inner acute-angle bars 5411b and upper acute-angle bars 5411c are connected by a plurality of reinforcing bars 5411d, and one side of the bottom right-angle bars 5411a, inner acute-angle bars 5411b and upper acute-angle bars 5411c, which is far from the U-shaped longitudinal side of the frame 541, can be butted with the edge end of the notch of the other side of the outer transition bracket 43. The U-shaped longitudinal edge of the frame 541 is provided with a lower rod 5412 and an upper rod 5413 which are parallel to each other, and the bottom rod 5412 is connected with the upper rod 5413 through a plurality of reinforcing rods; the two side ends of the upper rod 5413 are respectively and vertically fixedly connected with one side end of the upper acute angle rod 5411c, the two side ends of the bottom rod 5412 are respectively and vertically fixedly connected with one side end of the bottom right angle rod 5411a, and the two proximal ends of the bottom rod 5412 are respectively and vertically fixedly connected with one side end of the inner acute angle rod 5411 b. The U-shaped longitudinal edge of the frame 541 is provided with a II-shaped push rod 5414, and two bottom side ends of the push rod 5414 are respectively fixedly connected with two side ends of the upper rod 5413. The access sliding table guide rails 542 are respectively fixed on the upper surfaces of the upper sharp angle bars 5411c, and can be butted with the outer transition guide rails 46 on the groove edges of the outer transition brackets 43, so that the sliding table trolley 10 can be fixed and/or slid. The fine guide plates 543 are respectively fixed to side surfaces of the inner sharp angle bars 5411b so that the fine guide plates 543 allow the horizontal positioning cams 5232 of the cam guide 523 to slide therealong. Two of the four high-low positioning cams 544 are respectively fixed at two ends of the lower surface of the inner sharp angle rod 5411b and respectively can be abutted against the four fine positioning cushion blocks 525. The bottom right angle bar 5411a of the frame 541 is fixedly provided with a directional wheel 5415 under the side end close to the U-shaped longitudinal edge, and is fixedly provided with a universal wheel 5417 under the side end far from the U-shaped longitudinal edge, and the universal wheel 5415 and the directional wheel 5414 of the frame 541 run under the guidance of the thick guide plate 5262 and can run to the periphery of the fine positioning base 521. The U-shaped longitudinal edge of the frame 541 is provided with an inner rod 5416 parallel to the upper rod 5413, and two ends of the inner rod 5416 are vertically and fixedly connected with two proximal ends of two upper acute angle rods 5411 c. The lower wire pressing block 5418 is arranged on the reinforcing rod between the bottom right angle rod 5411a and the upper acute angle rod 5411c of the frame 541, which is far away from the U-shaped longitudinal edge, and can be hooked by the hook arm 4352 of the fixed clamping piece 435 on the outer transition bracket 43 so as to fix the manual trolley 54 at the notch on the other side of the outer transition bracket 43. The bottom rod 5412 of the U-shaped longitudinal edge of the frame 541 is also fixedly provided with a locking bolt 5419 for locking the manual trolley 54 from sliding when the manual trolley 54 is parked outside the positioning mechanism 52. The upper surface of the upper acute angle rod 5411c of the frame 541, which is close to the proximal end of the U-shaped longitudinal edge, is fixedly provided with a sliding table trolley buffer block 95.

As shown in fig. 6D, the locking unit 545 has a fixing base plate 5451, a C-shaped fixing plate 5452, and a linkage assembly 5453. One side end of the lower surface of the fixing base plate 5451 is fixed to the middle upper surface of the upper rod 5413, and the other side end of the lower surface is fixed to the middle upper surface of the inner rod 5416. The lower side of the C-shaped fixing plate 5452 is fixed to the middle side surface of the upper rod 5413. The linkage assembly 5453 is used for locking the sliding table trolley, one end of the linkage assembly is fixed on the upper surface of the fixed bottom plate 5451, and the other end of the linkage assembly is fixed on the upper side of the C-shaped fixed plate 5452. The linkage assembly 5453 has a first guide holder 54531, a second guide holder 54532, an H-clip 54533, a telescoping guide 54534, a handle 54535, and a linkage assembly 54536. The first guide seats 54531 and the second guide seats 54532 are alternately fixed on the fixed bottom plate 5451; the H-shaped clamping block 54533 is located between the first guide seat 54531 and the second guide seat 54532, one side surface is slidingly pivoted on the first guide seat 54531, the other side surface is slidingly pivoted on the second guide seat 54532, and the upper groove of the H-shaped clamping block 54533 can be clamped with the clamping block 124 of the docking assembly 12 of the sliding table trolley 10; the upper end of the telescopic guide rod 54534 is fixedly connected to the inner surface of the lower groove of the H-shaped clamping block 54533, and the lower end of the telescopic guide rod is inserted into a guide rod sleeve fixedly connected to the fixed bottom plate 5451; the middle part of the handle 54535 is pivoted with the upper side of the C-shaped fixed plate 5452; one end of the connecting rod assembly 54536 is pivoted on the transverse block in the middle of the H-shaped clamping block 54533, the middle is pivoted on the second guide seat 54532, and the other end is pivoted at the lower end of the handle 54535.

The structure of the up-down line trolley is the same as that of the up-down line power trolley 48, except that two plane cams of the first and second slider members of the up-down line trolley are respectively rollably abutted against the upper and lower surfaces of the motor guide rail 522 of the positioning mechanism 52, and side cams are rollably abutted against the side surfaces of the motor guide rail 522 of the positioning mechanism 52; the C-shaped auxiliary clamping block is clamped with the motor guide rail 522 of the positioning mechanism 52.

As shown in fig. 7, the working principle of the flexible sliding table for the white car body welding production line of the invention is as follows:

And (3) the process from assembly completion to movement of the welding fixture provided with the A model to the welding position of the flexible sliding table:

(1) Placing the sliding table trolley 10 provided with the A-type welding fixture on the manual trolley 54, and lifting the handle on the locking unit 545 of the manual trolley 54, so that the H-shaped clamping block 54533 of the locking unit 545 is clamped with the clamping block 124 of the first butt joint part 121 on the lower surface of the bracket 11 of the sliding table trolley 10, thereby fixing the sliding table trolley 10 on the manual trolley 54; the cams 1312 of the reference universal slider 131 and the cams 1322 of the auxiliary universal slider 132, which are fixedly provided on both sides of the lower surface of the carriage 10 bracket 11, are slidably provided on the in-out carriage rail 542.

(2) The universal wheel 5415 of the manual cart 54 initially runs to the periphery of the fine positioning base 521 of the positioning mechanism 52 through the guidance of the coarse guide plate 5262 of the coarse limiting assembly 526, and the locking bolt 5415 is inserted. The manual trolley 54 is pushed continuously, the horizontal difference is adjusted by sliding the fine guide plate 543 on the horizontal positioning cam 5232, so that the high-low positioning cam 544 of the manual trolley 54 runs on the fine positioning cushion block 525, the high-low of the access sliding table guide rail 542 of the manual trolley 54 is adjusted to be in horizontal seamless butt joint with the outer transition guide rail 46 on the outer transition support 43, the locking bolt 5419 is inserted, and the hook arm 4352 of the fixed clamping piece 435 of the outer transition support 43 hooks the lower line pressing block 5417 of the manual trolley 54. At this time, the manual cart 54 is abutted with the outer transition bracket 43 of the up-down line slipway unit 40.

(3) The electric quick plug-in support 16 and the vehicle type identifier support 15 under the main body support 11 of the sliding table trolley 10 respectively carry out inspection, debugging and vehicle type identification on the air source quick plug-in connection air source on the wiring side positioning mechanism 92. After the debugging is completed, the clamping groove blocks of the dragging mechanism of the up-and-down line power trolley on the motor guide rail 522 are lifted by the air cylinders, so that the U-shaped groove openings are clamped on the clamping blocks 124 of the third butting piece 123 at the center position of the longitudinal support 113 of the main body support 11 of the sliding table trolley 10 and continuously propped up, and then the positioning sensor 4855 of the dragging mechanism senses whether the clamping blocks 124 are clamped or not. If the sensor catches, the handle 54535 of the locking unit 545 is lowered. The motor 482 of the on-off line power trolley is started to perform the first drag operation, and the on-off line power trolley moves along the motor track 522 toward the groove inside of the outer transition bracket 43, thereby driving the slide table trolley 10 to slide on the in-out slide table rail 542 to the outer transition rail 46 on the outer transition bracket 43. When the power trolley sensor 91 in the groove of the outer transition bracket 43 detects the sensing detection blocks 484C outside the first and second sliding block pieces of the up-and-down line power trolley, the motor 482 of the up-and-down line power trolley is closed, and the cylinder 4851 of the dragging mechanism 485 of the up-and-down line power trolley is lowered, so that the U-shaped notch of the dragging mechanism 485 is separated from the clamping block 124 of the third butt joint piece 123 in the center position of the sliding table trolley 10. The air cylinder 4233 of the rail opening mechanism 423 on the inner transition bracket 42 pushes and closes the openable and closable guide rail group 47, and the slider 332 is rotated by the air cylinder 333 so that the steering guide rail 334 communicates the openable and closable guide rail group 47 with the outer transition guide rail 46 on the outer transition bracket 43 in a straight line. And then, the up-and-down line power trolley returns to the side of the positioning mechanism 52, which is close to the pi-shaped push rod 5414, the clamping groove blocks 48521 of the up-and-down line power trolley are further clamped with the clamping blocks 124 on the second butting piece 122 on the sliding table trolley 10 to carry out a second dragging operation, and the motor of the up-and-down line power trolley 546 is started to further push the sliding table trolley 10 to the upper part of the inner transition support, so that the up-and-down line sliding table unit 40 of the sliding table trolley 10 is completed. The drag mechanism of the on-off line power cart 546 is then disconnected from the docking assembly 12 of the slipway cart 10.

(4) At this time, the sliding table trolley 10 is located on the inner transition support, the air cylinder 4233 of the rail opening mechanism 423 on the inner transition support 42 opens the openable guide rail group 47, and the air cylinder 333 rotates the sliding blocks 332 to 90 ° to enable the steering guide rail 334 to communicate the upper and lower line sliding table guide rail 44 with the inner transition guide rail 45 on the upper surface of the upper short longitudinal rod 422 to form a straight line. The clamping groove blocks 4852 of the dragging mechanism 485 of the up-and-down line power trolley 48 in the communicable linear groove 401 are lifted by the air cylinders 4851, so that the U-shaped notch is clamped at the clamping blocks 124 of the third butting piece 123 at the side end of the longitudinal support 113 of the sliding table trolley 10. At this time, the steering mechanism 33 on the corner slide bracket 31 has also adjusted and communicated the upper and lower wire slide rail 44 and the corner rail 32 on the upper surface of the upper short vertical bar 315 to a straight line. The up-and-down power trolley 48 then drives the slipway trolley 10 to slide on the up-and-down slipway guide 44 to the corner slipway unit 30.

(5) When the sliding table trolley 10 provided with the welding fixture of the A type is arranged, the steering guide rail 334 of the steering mechanism 33 on the corner sliding table support 31 is rotated by 90 degrees, and the sliding power trolley 24 in the groove of the sliding table support 20 drives the sliding table trolley 10 to slide to each welding position. And the line side positioning mechanism 92 outside the groove of the transverse sliding table support 20 is used for fixing, ventilating and detecting the vehicle type of each sliding table trolley 10.

In addition, the flexibility of the flexible sliding table for the white car body welding production line is also embodied on the random switching and replacement of the required welding car type. Because of space limitation, the equipment design is switched by four on-line vehicle types (A vehicle type, B vehicle type, C vehicle type and D vehicle type) at will, and if the number of vehicle types is increased, a vehicle type welding fixture needs to be firstly taken off line and then a new welding fixture is taken on line. Vehicle type switching principle description:

1. when the buffer storage position is not waiting for the vehicle type, the up-and-down line power trolley 48 and the transverse moving power trolley 24 can directly drag the vehicle type A to be welded to the welding position for welding.

2. If a plurality of vehicle types are positioned at the cache position on the flexible sliding table, and the vehicle type to be welded cannot directly slide to the welding position, the other vehicle types need to be transferred to other cache positions, and a channel is opened for the vehicle type needing to be welded.

Description of the specific principle as shown in fig. 7, there are vehicles a, B and C at the welding station i, waiting station ii and waiting station iii, respectively, and a welding vehicle D is required. Then the need is: the vehicle A slides to a buffer memory position IV; then, the carriage B is slid to the V position, the carriage C is slid to the VI position, and the up-and-down line power carriage 48 and the traversing power carriage 24 are connected with the carriage D to drag the carriage D to weld at the welding position I.

Claims

1. The on-off line artificial trolley for the white car body welding production line is characterized by comprising a positioning mechanism and an artificial trolley;

the positioning mechanism has:

a fine positioning base;

at least four fine positioning cushion blocks are used for precisely positioning the height and symmetrically and fixedly arranged at four corners of the fine positioning base;

The artificial trolley has:

The frame is similar to a U shape and can travel to the periphery of the fine positioning base;

the two inlet and outlet sliding table guide rails are fixedly arranged on the upper surface of the frame in parallel;

The two precise guide plates are used for horizontally and precisely positioning and are respectively arranged on the side surfaces of the U-shaped inner part of the frame and respectively used for sliding of the cam guide;

At least four high-low positioning cams which are fixedly arranged at four corners of the lower surface of the frame and can respectively lean against the four fine positioning cushion blocks;

The positioning mechanism further comprises two rows of coarse limiting assemblies, the two rows of coarse limiting assemblies are parallel to the directions of the two motor guide rails and are respectively positioned at two outer sides of the fine positioning base, and the frame can run between the fine positioning base and the coarse limiting assemblies;

The coarse limiting assembly comprises a plurality of fixed feet which are arranged at intervals and coarse guide plates which are used for connecting the fixed feet in series, and universal wheels of the frame run under the guidance of the coarse guide plates;

The cam guide device is provided with a cam guide support fixedly connected with the fine positioning base and a plurality of horizontal positioning cams fixedly arranged on the upper surface of the cam guide support, and the horizontal positioning cams slide along the fine guide plate;

the U-shaped two transverse side surfaces of the frame are provided with transverse frames with right-angled triangles in cross section, each transverse frame is provided with a bottom right-angle rod, an inner sharp-angle rod and an upper sharp-angle rod which are parallel to each other, and the bottom right-angle rod, the inner sharp-angle rod and the upper sharp-angle rod are connected through a plurality of reinforcing rods;

The U-shaped longitudinal edge of the frame is provided with a bottom rod and an upper rod which are mutually parallel, and the bottom rod is connected with the upper rod through a plurality of reinforcing rods; the two side ends of the upper rod are respectively and vertically fixedly connected with one side end of the upper sharp angle rod, the two side ends of the bottom rod are respectively and vertically fixedly connected with one side end of the bottom right angle rod, and the two proximal ends of the bottom rod are respectively and vertically fixedly connected with one side end of the inner sharp angle rod;

the inlet and outlet sliding table guide rail is fixedly arranged on the upper surface of the upper sharp angle rod respectively, the precise guide plates are fixedly arranged on the side surfaces of the inner sharp angle rod respectively relatively, and two of the four high and low positioning cams are fixedly arranged at two ends of the lower surface of the inner sharp angle rod;

A directional wheel is fixedly arranged below the side end, close to the U-shaped longitudinal edge, of the bottom right-angle rod of the frame, a universal wheel is fixedly arranged below the side end, far away from the U-shaped longitudinal edge, of the bottom right-angle rod of the frame, and the universal wheel and the directional wheel can travel to the periphery of the fine positioning base;

The U-shaped longitudinal edge of the frame is provided with an inner rod parallel to the upper rod, and two ends of the inner rod are vertically and fixedly connected with two proximal ends of the two upper sharp angle rods;

the artificial trolley further has a locking unit having:

The fixed bottom plate is characterized in that one side end of the lower surface is fixed on the upper surface of the middle part of the upper rod, and the other side end of the lower surface is fixed on the upper surface of the middle part of the inner rod;

the lower side surface of the C-shaped fixing plate is fixed on the side surface of the middle part of the upper rod;

One end of the linkage component is fixed on the upper surface of the fixed bottom plate, and the other end of the linkage component is fixed on the upper side of the C-shaped fixed plate;

The linkage assembly has:

a first guide seat and a second guide seat which are alternately fixed on the fixed bottom plate,

The H-shaped clamping block is positioned between the first guide seat and the second guide seat, and two side surfaces of the H-shaped clamping block are respectively in sliding pin joint with the first guide seat and the second guide seat;

the upper end of the telescopic guide rod is fixedly connected to the inner surface of the lower groove of the H-shaped clamping block, and the lower end of the telescopic guide rod is inserted into a guide rod sleeve fixedly connected to the fixed bottom plate;

the middle part of the handle is pivoted with the upper side of the C-shaped fixing plate;

one end of the connecting rod assembly is pivoted on the transverse block in the middle of the H-shaped clamping block, the middle of the connecting rod assembly is pivoted on the second guide seat, and the other end of the connecting rod assembly is pivoted at the lower end of the handle;

The fine positioning base is provided with a plurality of parallel frame supporting beams and side plates respectively fixed on two sides of the frame supporting beams, two rows of cam guides are fixed on the opposite inner sides of the side plates, and the fine positioning cushion blocks are fixed on the opposite outer sides of the side plates; one side of the frame bracing beam is respectively provided with a power trolley buffer block;

2. The on-off line artificial trolley for a body-in-white welding line according to claim 1, wherein the cam guide has: the cam guide supports are fixedly arranged on the opposite inner sides of the side plates; and the plurality of horizontal positioning cams are fixedly arranged on the outer side surface of the cam guide support.

3. The cart for welding production line of white car body of claim 1, wherein the fine positioning base is further provided with two parallel motor transverse short beams, a large section of each motor transverse short beam is vertically erected on the frame supporting beam, the motor guide rails are respectively fixed on the outer side of the upper surface of each motor transverse short beam, and a rack is fixed on the inner side of the upper surface of one motor transverse short beam.

4. The on-off line artificial trolley for the body-in-white welding production line according to claim 2, wherein the cam guide support is further provided with a motor sensor.