CN223223223U

CN223223223U - Frame assembly fixture

Info

Publication number: CN223223223U
Application number: CN202422383223.2U
Authority: CN
Inventors: 祝兴民; 陈杰; 李永刚; 石林萧; 刘民宪; 鹿德林
Original assignee: Sinomach Casting & Forging Machinery Co ltd
Current assignee: Sinomach Casting & Forging Machinery Co ltd
Priority date: 2024-09-29
Filing date: 2024-09-29
Publication date: 2025-08-15
Anticipated expiration: 2034-09-29

Abstract

The utility model provides a frame group is pieced together anchor clamps, install a plurality of ordinary positioner of group that can longitudinal movement and the plug pin positioner of a set of fixed setting on unable adjustment base, the locating pin mechanism on the plug pin positioner can cooperate the locating hole on the longeron for the frame, realize the ascending accurate location of longeron length for the frame, ordinary positioner and plug pin positioner are last all to be provided with rotatable turnover seat, can also drive it together and overturn when placing the longeron for the frame, and then satisfy the cooperation of different contained angles between the longeron of the frame and assemble the demand, operating personnel need not to stop control point and size verification in the processing procedure of assembling, not only can effectively guarantee the assembly quality of longeron, can also reduce staff's intensity of labour by a wide margin, improve the efficiency of whole assembly operation.

Description

Frame assembly fixture

Technical Field

The utility model relates to the technical field of frame production line equipment, in particular to a frame assembly clamp.

Background

At present, most of the existing frame assembly clamps are lower in automation degree and simple in structure, compression positioning of the longitudinal beams is generally achieved through clamping arms, accurate limiting on the length direction of the frame longitudinal beams cannot be achieved, in subsequent assembly processing, continuous control of inching and size verification are needed, after size phase adaptation is guaranteed, the frame longitudinal beams are bolted or riveted, time is wasted in the whole processing process, labor intensity of operators is high, production efficiency is low, meanwhile, the clamps for compressing and positioning the frame longitudinal beams are mainly fixed, rotation adjustment of the frame longitudinal beams cannot be achieved in the assembly process, and assembly of different included angles between the frame longitudinal beams cannot be met.

Disclosure of utility model

The utility model aims to provide a frame assembly fixture, which can accurately position a frame longitudinal beam in the length direction through a plug pin positioning device, and meanwhile, the frame longitudinal beam can be driven to synchronously rotate through the arrangement of a turning seat, so that the matching assembly of different included angles between the frame longitudinal beams is satisfied, and the problem in the prior art is solved.

The technical scheme includes that the frame assembly fixture comprises a fixed base, a plurality of groups of common positioning devices and a group of plug pin positioning devices are mounted on the fixed base, each common positioning device can move along the length direction of the fixed base, the plug pin positioning devices are fixedly arranged on the fixed base, the common positioning devices comprise a longitudinal moving sliding table, each plug pin positioning device comprises a fixed platform, a turnover side box body and a fixed side box body which can transversely move are mounted on each longitudinal moving sliding table and the fixed platform, an inner side pressing cylinder is hinged in each turnover side box body and each fixed side box body, an inner side pressing arm is mounted on a piston rod of each inner side pressing cylinder, each inner side pressing arm is hinged in each box body, a turnover cylinder is hinged in each turnover side box body, a turnover seat is hinged at the top of each turnover side box body, a piston rod of each turnover cylinder is hinged on the corresponding turnover seat, and each turnover seat of the common positioning devices is hinged in each turnover seat, The top of fixed side box is all fixed and is set up longeron ventral surface fixing base, and the locating pin mechanism that can remove the adjustment is all installed at plug pin positioner's turnover seat, fixed side box's top, and longeron for the frame can be placed longeron ventral surface fixing base and locating pin mechanism on, and locating pin mechanism can realize the longitudinal limit to longeron for the frame, and the piston rod of turnover cylinder is flexible can drive longeron ventral surface fixing base or locating pin mechanism and overturn side box swing relatively, and the piston rod of inboard swage cylinder is flexible can drive inboard hold-down arm and rotate and be close to longeron ventral surface fixing base or locating pin mechanism. The longitudinal moving sliding table is provided with a longitudinal moving gear motor, a longitudinal linear guide rail pair is arranged between the longitudinal moving sliding table and the fixed base, and a longitudinal gear rack pair is arranged between the longitudinal moving gear motor and the fixed base. The device is characterized in that a transverse centering gear motor is arranged on the longitudinal moving sliding table and the fixed platform, the transverse centering gear motor is arranged between the overturning side box body and the fixed side box body, output shafts are arranged on two sides of the transverse centering gear motor, transverse ball screw pairs are arranged between the output shafts and the overturning side box body and between the output shafts and the fixed side box body respectively, transverse linear guide pairs are arranged between the overturning side box body, the fixed side box body and the longitudinal moving sliding table and between the overturning side box body and the fixed platform respectively, and the transverse centering gear motor can start the overturning side box bodies and the fixed side box bodies on two sides to synchronously and transversely move to be close to or far away from each other. The locating pin mechanism comprises a small locating box body arranged at the top of the turnover seat and the fixed side box body, the small locating box body can be longitudinally moved and adjusted, a sliding table for locating pins capable of vertically lifting is further arranged in the small locating box body, a cylinder for locating pin extension is arranged on one side of the sliding table for locating pins, a piston rod of the cylinder for locating pin extension is connected with a locating pin through a sliding sleeve for locating pins, and locating holes matched with the locating pins are formed in a longitudinal beam for a frame. a linear guide rail pair for longitudinal micro-adjustment of the positioning pin is arranged between the small positioning box body and the turning seat or the fixed side box body, and the turning seat, The fixed side box body is provided with an air cylinder mounting seat and a plug pin longitudinal positioning plate, the air cylinder mounting seat is provided with a positioning pin compacting air cylinder, the small positioning box body is positioned between the positioning pin compacting air cylinder and the plug pin longitudinal positioning plate, a vertical linear guide pair and a positioning pin vertical moving screw pair are further arranged between the positioning pin sliding table and the small positioning box body, one end of the positioning pin vertical moving screw pair, which upwards penetrates out of the small positioning box body, is provided with a hand wheel, the hand wheel is rotated to drive the positioning pin sliding table to vertically lift relative to the small positioning box body, a piston rod of the positioning pin compacting air cylinder extends to compact the small positioning box body on the plug pin longitudinal positioning plate, and the longitudinal adjustment of the small positioning box body is realized respectively, And (3) vertically adjusting the positioning pin.

The frame assembly fixture has the advantages that the plurality of groups of common positioning devices capable of longitudinally moving and the group of fixed plug pin positioning devices are arranged on the fixed base, the positioning pin mechanisms on the plug pin positioning devices can be matched with the positioning holes on the longitudinal beams for the frame, the accurate positioning on the longitudinal beams for the frame in the length direction is realized, the common positioning devices and the plug pin positioning devices are both provided with the rotatable turnover seat, the longitudinal beams for the frame can be placed and simultaneously can be driven to be turned together, the matching assembly requirements of different included angles between the longitudinal beams for the frame are further met, operators do not need to control point movement and size verification continuously in the assembly processing process, the assembly quality of the longitudinal beams can be effectively ensured, the labor intensity of the operators can be greatly reduced, and the efficiency of the whole assembly operation is improved.

Drawings

FIG. 1 is a schematic three-dimensional structure of the present utility model;

FIG. 2 is a front view of the present utility model;

FIG. 3 is an enlarged view of the cross-sectional view taken along line A-A in FIG. 2;

FIG. 4 is an enlarged view of the B-B cross-sectional view of FIG. 2;

FIG. 5 is an enlarged view of a portion of I in FIG. 2;

fig. 6 is a partial enlarged view of II in fig. 3.

Detailed Description

The utility model relates to a frame assembly clamp, as shown in figures 1-6, which comprises a fixed base 1, wherein a plurality of groups of common positioning devices and a group of plug pin positioning devices are arranged on the fixed base 1, each common positioning device can move along the length direction of the fixed base 1, and the plug pin positioning devices are fixedly arranged on the fixed base 1.

The common positioning device comprises a longitudinal moving sliding table 4, the longitudinal moving sliding table 4 can move along the length direction of the fixed base 1, the plug pin positioning device comprises a fixed platform 28, and the fixed platform 28 can be directly fixed and welded on the fixed base 1. The longitudinal movement sliding table 4 can realize the longitudinal movement of the self through a telescopic cylinder, a movement wheel with a motor and other mechanisms.

The overturning side box body 6 and the fixed side box body 10 which can move transversely are arranged on the longitudinal moving sliding table 4 and the fixed platform 28, the longitudinal beams 15 for the frames can be positioned and placed on the overturning side box body 6 and the fixed side box body 10, and the appointed assembling distance of the longitudinal beams 15 for the frames on two sides is adjusted through the transverse movement of the overturning side box body 6 and the fixed side box body 10 on two sides.

The overturning side box body 6 and the fixed side box body 10 are both hinged with an inner side pressing cylinder 14, a piston rod of the inner side pressing cylinder 14 is provided with an inner side pressing arm 13, and the inner side pressing arms 13 are both hinged with the box body. The overturning cylinder 11 is also hinged in the overturning side box body 6, the overturning seat 23 is hinged at the top of the overturning side box body 6, and a piston rod of the overturning cylinder 11 is hinged on the overturning seat 23.

The top of the turnover seat 23 and the fixed side box 10 of the common positioning device are fixedly provided with longitudinal beam web surface fixing seats 12, and the top of the turnover seat 23 and the fixed side box 10 of the plug pin positioning device are provided with positioning pin mechanisms capable of being movably adjusted. The longitudinal beam 15 for the frame can be placed on the longitudinal beam ventral surface fixing seat 12 and the positioning pin mechanism, and the positioning pin mechanism can realize longitudinal limit of the longitudinal beam 15 for the frame. The movement adjustment of the positioning pin mechanism can realize longitudinal and vertical position adjustment through driving mechanisms such as a screw nut, a gear rack and the like.

The piston rod of the cylinder 11 for overturning stretches and contracts to drive the longitudinal beam ventral surface fixing seat 12 or the locating pin mechanism to swing relative to the overturning side box body 6, so that synchronous overturning of the longitudinal beams 15 for the upper frame is realized, and the matched assembling angle positions of the longitudinal beams 15 for the frames on two sides are adjusted. The piston rod of the inner side pressing cylinder 14 stretches and contracts to drive the inner side pressing arm 13 to rotate to be close to the longitudinal beam ventral surface fixing seat 12 or the locating pin mechanism, so that the longitudinal beam 15 for the frame is pressed and located on the longitudinal beam ventral surface fixing seat 12 or the locating pin mechanism through the inner side pressing arm 13, and the longitudinal accurate location of the longitudinal beam 15 for the frame is achieved.

Further, in order to realize the movement of the longitudinal movement sliding table 4 on the fixed base 1, a speed reduction motor 5 for longitudinal movement is installed on the longitudinal movement sliding table 4, a longitudinal linear guide rail pair 2 is installed between the longitudinal movement sliding table 4 and the fixed base 1, a longitudinal gear rack pair 3 is installed between the speed reduction motor 5 for longitudinal movement and the fixed base 1, and the speed reduction motor 5 for longitudinal movement is started to drive the longitudinal movement sliding table 4 and a common positioning device to perform longitudinal movement adjustment along the fixed base 1.

Further, in order to achieve synchronous movement adjustment of the two frame stringers 15 on the overturning side case 6 and the fixed side case 10, subsequent frame assembly operation is facilitated, the longitudinal movement sliding table 4 and the fixed platform 28 are respectively provided with a speed reducing motor 9 for transverse centering, and the speed reducing motor 9 for transverse centering is located between the overturning side case 6 and the fixed side case 10.

The both sides of gear motor 9 for horizontal centering all are equipped with the output shaft, each output shaft respectively with upset side box 6, all install horizontal ball screw pair 8 between the fixed side box 10, upset side box 6, fixed side box 10 and longitudinal movement slip table 4, fixed platform 28 all install horizontal linear guide pair 7, transversely to the upset side box 6 that can drive both sides with gear motor 9 start, fixed side box 10 synchronous lateral movement is close to or keeps away from, and then realize upset side box 6, fixed side box 10 on place the synchronous removal adjustment of longeron 15 for the frame.

Further, in order to realize the movement adjustment of the positioning pin mechanism, as shown in fig. 5 and 6, the positioning pin mechanism includes a positioning small box 21 disposed at the top of the turnover seat 23 and the fixed side box 10, the positioning small box 21 can be longitudinally moved and adjusted, and a sliding table 25 for positioning pin capable of vertically lifting is further installed in the positioning small box 21. A positioning pin expansion cylinder 18 is mounted on one side of the positioning pin slide table 25, a positioning pin 27 is connected to a piston rod of the positioning pin expansion cylinder 18 through a positioning pin slide sleeve 26, and a positioning hole for fitting the positioning pin 27 is formed in the frame rail 15.

The positioning pin extension cylinder 18 and the positioning pin 27 are positioned at two sides of the length direction of the sliding table 25 for the positioning pin, and the piston rod of the positioning pin extension cylinder 18 extends out to drive the positioning pin 27 to enter and exit into the positioning hole on the longitudinal beam 15 for the frame, so that the accurate positioning of the longitudinal beam 15 for the frame in the length direction is realized.

In order to realize the adjustment of the longitudinal position of the small positioning box body 21, a linear guide rail pair 19 for the longitudinal fine adjustment of the positioning pin is arranged between the small positioning box body 21 and the overturning seat 23 or the fixed side box body 10, an air cylinder mounting seat 24 and a plug pin longitudinal positioning plate 16 are arranged on the overturning seat 23 and the fixed side box body 10, an air cylinder 22 for the compression of the positioning pin is arranged on the air cylinder mounting seat 24, the small positioning box body 21 is positioned between the air cylinder 22 for the compression of the positioning pin and the plug pin longitudinal positioning plate 16, and a piston rod of the air cylinder 22 for the compression of the positioning pin extends out to push the small positioning box body 21 to the position of the plug pin longitudinal positioning plate 16, so that the longitudinal movement positioning of the small positioning box body 21 is realized.

In order to realize the vertical position adjustment of the positioning pin 27, a vertical linear guide rail pair 17 and a positioning pin vertical moving screw pair 20 are further installed between the sliding table 25 for the positioning pin and the small positioning box 21, a hand wheel is arranged at one end of the positioning pin vertical moving screw pair 20, which upwards penetrates out of the small positioning box 21, and the hand wheel can be rotated to drive the sliding table 25 for the positioning pin to vertically lift relative to the small positioning box 21, so that the vertical position adjustment of the positioning pin 27 is realized.

The utility model relates to a frame assembly clamp which can be composed of a group of plug pin positioning devices and three groups of common positioning devices, wherein the plug pin positioning devices are fixed on a fixed base 1 and cannot longitudinally move, and the three groups of common positioning devices can longitudinally move on the fixed base 1 to avoid bolting or riveting positions on a frame. The plug pin positioning device can also be made to be capable of moving longitudinally along the fixed base 1 according to the requirements of customers.

The plug pin positioning device and the common positioning device are divided into a fixed side and a turnover side, namely a turnover side moving box body 6 and a fixed side moving box body 10 on two sides, and the two sides can be driven by a speed reducing motor 9 for middle transverse centering to perform centering movement, so that the width requirements of frames of different specifications are met, the turnover side can realize the inclination of a relevant mounting surface, and the transverse beam is convenient to place and assemble.

The plug pin positioning device is different from a common positioning device in that the positioning pin 27 which can be pneumatically telescopic is arranged on the vertical mounting surface, the vertical mounting surface and the positioning pin 27 can longitudinally move, the positioning pin 27 is in a retracted state when not positioned, and the positioning pin 27 extends out and is inserted into the positioning pin hole of the longitudinal beam when the frame is assembled, so that the longitudinal beam is conveniently positioned. The positioning pins 27 can follow up in the longitudinal direction, the handle can be manually rotated, the size of the positioning pins 27 from the wing surfaces of the longitudinal beams can be adjusted, the requirements of assembling frames of different specifications can be met conveniently, and the positioning small box bodies 21 are pressed to the sides of the plug pin longitudinal positioning plates 16 by the positioning pin pressing cylinders 22 on two sides, so that the function of complete symmetry of the longitudinal beams on two sides is realized.

As shown in fig. 1 and 2, a plurality of groups of skirting boards and adjusting bolts can be arranged below the fixed base 1, the flatness and straightness of the mounting surface on the fixed base 1 can be adjusted, the mounting surface and the positioning spigot are arranged on the fixed base 1 and used for fixing two longitudinal linear guide rail pairs 2 and longitudinal gear rack pairs 3, wherein the pitch line of the racks is parallel to the linear guide rail.

2 Groups of transverse linear guide pairs 7, namely 4 transverse linear guide pairs 7, are arranged on the installation surfaces of the longitudinal moving sliding table 4 and the fixed platform 28, 2 groups of transverse ball screw pairs 8 are arranged between the two transverse linear guide pairs 7, the installation surfaces of the bottoms of the overturning side box body 6 and the fixed side box body 10 are fastened to the sliding seat of the transverse linear guide pair 7, the screw bases of the transverse ball screw pairs 8 are fastened to the installation surfaces of the bottoms of the overturning side box body 6 and the fixed side box body 10, and the guiding and power transmission relation between the overturning side box body 6 and the fixed side box body 10 and the longitudinal moving sliding table 4 and the fixed platform 28 is established.

The transverse centering speed reducer 9 is arranged between the upper mounting surfaces of the longitudinal moving sliding table 4 and the fixed platform 28, the speed reducer is provided with two output shafts and is connected with the transverse ball screw pairs 8 on the two sides through two couplings, and the rotation directions of the two transverse ball screw pairs 8 used on each group of longitudinal moving sliding table 4 are opposite, so that when the transverse centering speed reducer 9 rotates, the overturning side box 6 and the fixed side box 10 are driven to synchronously perform centering movement inwards or outwards.

As shown in fig. 2 and 3, the working principle and structure of the inner pneumatic pressing part are the same on the fixed side and the turning side, a back-turning lug support of the inner pressing cylinder 14 is mounted on the bottom surface of the fixed side box 10 or the turning side box 6, a rotating shaft of the inner pneumatic pressing is mounted on the upper part of the fixed side box 10 or the turning side box 6, an inner pressing arm 13 is mounted on the rotating shaft, the middle of the pressing arm is connected with a front lug of the inner pressing cylinder 14, and under the action of the cylinder, when a piston rod stretches out, the pressing head of the inner pressing arm 13 presses a frame longitudinal beam.

The rear lug support of the turnover cylinder 11 is mounted on the bottom surface of the turnover side box 6, the rotating shaft of the turnover seat 23 is mounted on the upper portion of the turnover side box 6, the middle portion of the rotating seat 23 is connected with the front lug of the turnover cylinder 11, a nylon plate is mounted on the front portion of the rotating seat 23 and used for supporting the outer wing surface of the longitudinal beam 15 for the frame, when a piston rod retracts under the action of the turnover cylinder 11, the supporting surface of the longitudinal beam 15 for the frame on the turnover side is inclined so as to facilitate the placement and assembly of the cross beam for the frame, and when the piston rod stretches out, the supporting surface of the longitudinal beam 15 for the frame on the turnover side is in a horizontal and vertical state.

The centering moving part of the overturning side box body 6 and the fixed side box body 10, the pneumatic material pressing part at the inner sides of the centering moving part and the fixed side box body, and the pneumatic overturning part of the longitudinal beam at the overturning side are the same as the common locating device in terms of the plug pin locating device.

For the common positioning device, a longitudinal beam ventral surface fixing seat 12 is directly arranged on the outer side of the upper part of a fixed side box body 10, a longitudinal beam ventral surface fixing seat 12 is directly arranged on a turning seat 23 on the moving side, and a nylon plate is arranged on the inner vertical surface of the longitudinal beam ventral surface fixing seat 12 and used for supporting the outer ventral surface of a longitudinal beam 15 for a frame.

In the plug pin positioning device, a positioning pin portion is mounted on the upper outer side of the fixed side case 10, and a positioning pin portion is mounted on the upper portion of the movable side flip seat 23.

The fixing side box body 10 and the turnover seat 23 are provided with a plug pin longitudinal positioning plate 16, a positioning pin longitudinal micro-adjustment linear guide rail pair 19 and a cylinder mounting seat 24, wherein the cylinder mounting seat 24 is used for mounting a positioning pin compacting cylinder 22, the positioning small box body 21 is fastened on a sliding seat of the positioning pin longitudinal micro-adjustment linear guide rail pair 19, and the positioning small box body 21 and the fixing side box body 10 or the turnover seat 23 are in guiding relation.

Two vertical linear guide rail pairs 17 are arranged on the inner side vertical surface of the small positioning box body 21, a positioning pin is fastened to a sliding seat of the vertical linear guide rail pairs 17 through a sliding table 25, and the positioning pin and the small positioning box body 21 are in a vertical guiding relation. The positioning pin vertical moving screw pair 20 is fixed on the upper plate of the positioning small box body 21, and the screw seat of the positioning pin vertical moving screw pair 20 is fastened on the sliding table 25 for the positioning pin, so that the sliding table 25 for the positioning pin can move up and down by rotating the hand wheel.

The cylinder 18 for telescoping the positioning pin is mounted on the outer side of the sliding table 25 for the positioning pin, the sliding sleeve 26 for the positioning pin is mounted in the sliding table 25 for the positioning pin, a sliding bearing is arranged between the sliding sleeve 26 for the positioning pin and the sliding sleeve 25 for the positioning pin, and a guiding relationship is established between the sliding sleeve 26 for the positioning pin and the sliding sleeve 25 for the positioning pin. The outer side of the positioning pin sliding sleeve 26 is connected to the piston rod of the positioning pin expansion cylinder 18, and a positioning pin 27 is attached to the inner side of the positioning pin sliding sleeve 26, and the positioning pin 27 moves in an expansion and contraction manner by the positioning pin expansion cylinder 18. A nylon plate is installed on the front inner face of the small positioning box 21 for supporting the outer face of the longitudinal beam 15 for the frame, and a positioning pin 27 is extended out of the front face of the nylon plate or retracted into the nylon plate under the action of a cylinder 18 for stretching and retracting the positioning pin.

When the frame assembly fixture is used for continuous work in a frame assembly line, the formula of the frame to be produced is called according to the specification and the model of the frame to be produced, so that the manual/automatic operation can be realized; after the assembly fixture is started, the assembly fixture can be operated to a reset state, the widths of the fixed side and the turnover side are in a state of being larger than the width of the frame (data set in advance in a calling formula), the common positioning device is moved to a set position, so that riveting or bolting of the cross beam or a part and the longitudinal beam is facilitated, and the turnover side is in an inclined state, so that the frame is conveniently hoisted and placed by the longitudinal beam; pressing the 'turnover' button of the operation box, enabling the common positioning device and the turnover side air cylinder of the plug pin positioning device to act simultaneously, enabling the supporting surface of the related longitudinal beam 15 for the vehicle frame to be in a vertical and horizontal state, manually trimming the positioning pin part to align with the positioning pin hole for the vehicle frame, clicking the 'alignment', enabling the positioning pin 27 to extend and insert into the positioning hole of the longitudinal beam 15 for the vehicle frame, clicking the 'clamping', enabling the piston rod of the air cylinder 14 to extend on one inner side, enabling the pressure head of the inner side pressing arm 13 to press the longitudinal beam 15 for the vehicle frame, enabling the piston rod of the air cylinder 22 for the positioning pin to extend, pushing the small positioning box 21 to drive the positioning pin 27 and the longitudinal beam 15 for the vehicle frame to abut against the plug pin longitudinal positioning plate 16, enabling the left longitudinal beam and the right longitudinal beam to be in a vertical and symmetrical state, enabling the dimension between the two longitudinal beams to be 20mm or 50mm larger than the width of the theoretical vehicle frame at the moment, hoisting and placing the related cross beam and the plane beam, enabling an operator to press the 'assembling' key on the button box (for example, enabling the positioning pin 27 not to extend and the positioning pin 22 to extend to be detected by a detection switch, enabling the pressing of the air cylinder 22 to extend, enabling the positioning pin to be pressed on the button box) and then enabling the operation to be opened, the positioning pin 27 is retracted, the positioning pin pressing cylinder 22 is retracted, the assembled tire is opened, the carriage is lifted, and the reset key is pressed, so that the above-mentioned assembly operation is repeated.

The technical scheme of the utility model is not limited to the scope of the embodiments of the utility model. The technical content that is not described in detail in the utility model is known in the prior art.

Claims

1. The frame assembly clamp is characterized by comprising a fixed base (1), wherein a plurality of groups of common positioning devices and a group of plug pin positioning devices are arranged on the fixed base (1), each common positioning device can move along the length direction of the fixed base (1), the plug pin positioning devices are fixedly arranged on the fixed base (1), the common positioning devices comprise a longitudinal moving sliding table (4), each plug pin positioning device comprises a fixed platform (28), a turnover side box body (6) and a fixed side box body (10) which can transversely move are respectively arranged on the longitudinal moving sliding table (4) and the fixed platform (28), an inner side pressing cylinder (14) is respectively hinged in each turnover side box body (6) and the fixed side box body (10), an inner side pressing arm (13) is respectively arranged on a piston rod of each inner side pressing cylinder (14), each inner side pressing arm (13) is respectively hinged in each box body, a turnover side box body (6) is respectively hinged with a turnover cylinder (11), a turnover seat (23) is respectively hinged at the top of each turnover side box body (6), a turnover seat (23) is respectively hinged with a turnover side box body (23), and a fixed seat (23) is respectively arranged on a piston rod of each common positioning device, and the fixed seat (12) is arranged on the turnover side box body (23) The top of fixed side box (10) all installs the locating pin mechanism that can remove the adjustment, and longeron (15) can be placed on longeron ventral surface fixing base (12) and the locating pin mechanism for the frame, and locating pin mechanism can realize the vertical spacing to longeron (15) for the frame, and the piston rod of cylinder (11) is flexible can drive longeron ventral surface fixing base (12) or locating pin mechanism relative upset side box (6) swing for upset, and the piston rod of inboard swage cylinder (14) is flexible can drive inboard pressure arm (13) and rotate and be close to longeron ventral surface fixing base (12) or locating pin mechanism.

2. The frame assembly fixture of claim 1, wherein a longitudinal moving speed reducing motor (5) is arranged on the longitudinal moving sliding table (4), a longitudinal linear guide rail pair (2) is arranged between the longitudinal moving sliding table (4) and the fixed base (1), and a longitudinal gear rack pair (3) is arranged between the longitudinal moving speed reducing motor (5) and the fixed base (1).

3. The frame assembly fixture of claim 1, wherein the longitudinal moving sliding table (4) and the fixed platform (28) are respectively provided with a transverse pair of speed reducing motors (9), the transverse pair of speed reducing motors (9) are positioned between the overturning side box body (6) and the fixed side box body (10), two sides of the transverse pair of speed reducing motors (9) are respectively provided with output shafts, each output shaft is respectively provided with a transverse ball screw pair (8) between the corresponding output shaft and the overturning side box body (6) and between the corresponding output shaft and the corresponding fixed side box body (10), and transverse linear guide pairs (7) are respectively arranged between the corresponding overturning side box body (6), the corresponding fixed side box body (10) and the corresponding longitudinal moving sliding table (4) and the corresponding fixed platform (28), and the transverse pair of speed reducing motors (9) are started to drive the corresponding overturning side box bodies (6) and the corresponding fixed side box bodies (10) to synchronously move transversely and close or far.

4. The jig for assembling a vehicle frame according to claim 1, wherein the positioning pin mechanism comprises a positioning small box body (21) arranged at the top of the turning seat (23) and the fixed side box body (10), the positioning small box body (21) can be longitudinally moved and adjusted, a sliding table (25) for positioning pins capable of vertically lifting is further arranged in the positioning small box body (21), one side of the sliding table (25) for positioning pins is provided with a cylinder (18) for positioning pins to stretch, a piston rod of the cylinder (18) for positioning pins is connected with positioning pins (27) through a sliding sleeve (26) for positioning pins, and positioning holes matched with the positioning pins (27) are formed in the longitudinal beams (15) for the vehicle frame.

5. The frame assembly fixture of claim 4, wherein a positioning pin longitudinal micro-adjustment linear guide pair (19) is arranged between the small positioning box body (21) and the overturning seat (23) or the fixed side box body (10), an air cylinder mounting seat (24) and a plug pin longitudinal positioning plate (16) are arranged on the overturning seat (23) and the fixed side box body (10), a positioning pin compression air cylinder (22) is arranged on the air cylinder mounting seat (24), the small positioning box body (21) is positioned between the positioning pin compression air cylinder (22) and the plug pin longitudinal positioning plate (16), a vertical linear guide pair (17) and a positioning pin vertical movement screw pair (20) are further arranged between the positioning pin sliding table (25) and the small positioning box body (21), one end of the positioning pin vertical movement screw pair (20) penetrates out of the small positioning box body (21) upwards, a hand wheel for driving the positioning pin sliding table (25) to vertically lift relative to the small positioning box body (21) is rotated, a piston rod of the positioning pin compression air cylinder (22) extends out, and the positioning pin compression air cylinder (21) can be longitudinally adjusted to the positioning pin (21) and the positioning pin (27) respectively.