A body-in-white assembly jig

Abstract

This utility model relates to the field of automobile manufacturing technology, and more specifically, to a body-in-white assembly fixture, comprising: a bottom bracket, a side bracket, a mounting plate, an adjustment unit, a support unit, a positioning unit, a clamping unit, a position calibration component, and a locking component. The positioning unit includes a first positioning component and a second positioning component. The adjustment unit is capable of three-way adjustment, and the position calibration component has a circular calibration groove. The support unit, positioning unit, and clamping unit of this assembly fixture are respectively set according to the individual parts of each component assembly, thereby achieving support, positioning, and clamping of all parts of each component assembly. This ensures the assembly accuracy of each part, facilitates assembly by workers, improves assembly efficiency, and enhances the overall assembly accuracy of each component assembly, meeting assembly requirements and preventing insufficient assembly accuracy of individual component assemblies from affecting the overall assembly accuracy of the body-in-white, thus ensuring overall production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and more specifically, to a white body assembly fixture. Background Technology

[0002] With the increasing penetration of new energy vehicles and the growing number of cars on the road, major automakers are updating their models more frequently to improve quality and efficiency in the manufacturing process. To quickly gain customer attention and enhance competitiveness, automakers are required to shorten new car development cycles while improving component quality and body-in-white precision. During body-in-white prototyping, the lower body is assembled from approximately 38 welded parts, such as the left and right front and rear longitudinal beams, left and right door sills, and left and right A-pillar inner panels. These parts are then assembled into major component assemblies. The component assembly corresponding to the front floor connects to the component assemblies corresponding to the front engine compartment and the rear floor, respectively. Therefore, the front floor component assembly requires higher levels of levelness and assembly precision. However, during the prototyping stage, the production line is not highly automated, and reliable fixtures or jigs are lacking during component assembly, resulting in low assembly efficiency and compromised precision, which also affects production efficiency. Utility Model Content

[0003] To overcome the shortcomings of low efficiency in assembling various parts of the body-in-white in the prior art, this utility model provides a body-in-white assembly fixture that provides clamping and positioning for various parts of the body-in-white, assists in assembly, improves assembly accuracy, and increases production efficiency.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a body-in-white assembly fixture, comprising: a bottom bracket, side brackets slidably mounted on both sides of the bottom bracket, mounting plates adjustablely mounted on the bottom bracket and the side brackets, adjustment units detachably mounted on the mounting plates, support units mounted on the adjustment ends of the adjustment units, a positioning unit and a clamping unit, position calibration components mounted on the mounting plates, and locking components connected to the side brackets respectively. The locking components are used to fix the side brackets to the bottom bracket. The positioning unit includes a first positioning component and a second positioning component. The first positioning component is provided at the four corners of the bottom bracket, and the second positioning component is provided in the middle of the bottom bracket. The first positioning component is provided on the side brackets respectively. The working surface of the bottom bracket is horizontal, and the working surface of the side brackets is vertical. The adjustment unit is adjustable in three directions, and the position calibration component is provided with a circular calibration groove.

[0005] Mounting plates are installed on both the bottom and side supports. These plates are used to mount the support unit, positioning unit, and clamping unit. The mounting plates are adjustable, meaning their positions are not fixed and can be adjusted. Various mounting methods are available, such as using clamps, providing multiple mounting holes on the bottom and side supports, or using sliding grooves. Specifically, the bottom and side supports are preferably assembled using aluminum profiles with sliding mounting grooves for easy adjustment. Furthermore, an adjustment unit is provided, allowing the support unit, positioning unit, and clamping unit to be mounted on their adjustment ends, thus indirectly mounting them... On the mounting plate, the adjustment end of the adjustment unit can be adjusted in three directions, thereby further improving the adjustability of the support unit, positioning unit, and clamping unit, and enabling more precise position adjustment. This further improves the working accuracy of the support unit, positioning unit, and clamping unit, which can be achieved using a three-axis displacement stage. The position calibration component provides position and correction references for the installation positions of the support unit, positioning unit, and clamping unit. When this assembly fixture is initially assembled or the vehicle model is changed, a laser tracker is used with each position calibration component as a coordinate reference to determine and check the installation positions of the support unit, positioning unit, and clamping unit, ensuring installation accuracy.

[0006] The support unit serves as the installation reference, supporting key components and ensuring installation accuracy. The positioning unit provides positioning for the components. The positioning unit includes a first positioning element and a second positioning element. The first positioning element also has a support function and is positioned along the four corners of the bottom bracket to maximize the support area and improve the positioning effect. Together with the support unit, it provides overall support and positioning for each component assembly, ensuring the overall stability of the assembly during assembly. The second positioning element is located in the middle of the bracket, and the first positioning element is also located on the side brackets to fix the components from the side, improving the positioning effect and accuracy. The clamping unit is used to clamp the components, ensuring relative stability during and after installation and guaranteeing assembly accuracy. Each component is supported, positioned, or clamped by the support unit, positioning unit, and clamping unit. Each component has 2-4 support, positioning, or clamping points, thereby restricting the XYZ axes of each component, achieving positioning and fixation, and improving installation accuracy.

[0007] The side bracket and the bottom bracket are slidably connected. When the side bracket is not needed, it can be removed to facilitate the assembly of other parts. When the side bracket is needed, it can be moved back to its original position. After the side bracket is removed and after it is reset, it is fixed by locking components, such as bolts, pins, clips, or locks.

[0008] With the above settings, each support unit, positioning unit, and clamping unit of this assembly fixture is set according to each part of each part assembly, thereby achieving support, positioning, and clamping of all parts of each part assembly, ensuring the assembly accuracy of each part, facilitating assembly by workers, improving assembly efficiency, and also improving the overall assembly accuracy of each part assembly, meeting assembly requirements, avoiding the impact of insufficient assembly accuracy of each part assembly on the overall assembly accuracy of the body-in-white, and ensuring overall production efficiency.

[0009] Preferably, the first positioning component includes a vertical rod installed on the adjusting end of the adjusting unit, a reference block and a first positioning pin respectively connected to the vertical rod, and a lower pressure block threadedly connected to the first positioning pin. The reference block has a through hole at its axial center and a supporting reference surface at its top. The first positioning pin is located at the axial center of the reference block and has a threaded hole at its top axial center. The lower pressure block has a groove at its bottom axial center. When the lower pressure block is tightened, its bottom abuts against the supporting reference surface.

[0010] A reference block is installed at the top of the vertical rod. The first locating pin passes through the through hole of the reference block and connects to the vertical rod. The working end of the first locating pin has a locating surface that matches the hole position of the part. The top of the reference block has a supporting reference surface for supporting the part. When no part is placed, the lower pressure block is tightened and pressed down to contact the supporting reference surface. The first locating pin is wrapped inside, which protects the working end of the first locating pin and protects the locating surface from bumps, ensuring positioning accuracy. When positioning the part, the part is fixed between the reference block and the lower pressure block by tightening and pressing down. It plays both a positioning role and a clamping role, resulting in a better positioning effect. It is suitable for large sheet metal parts with far positioning holes.

[0011] Preferably, the first positioning component further includes a collar, an adjusting rod, and a first bolt. The vertical rod has a hollow structure and two collars are provided at the center of the shaft. The first positioning pin is slidably connected to the collars. The side of the vertical rod is provided with an L-shaped groove. The adjusting rod passes through the L-shaped groove and is connected to the first positioning pin. The first positioning pin is provided with an annular groove. The first bolt is threadedly connected to the vertical rod and passes through the vertical rod. When the first positioning pin moves to a set position, the first bolt abuts against the annular groove.

[0012] The first positioning pin is made adjustable and a collar is used to ensure sliding accuracy and prevent the first positioning pin from shaking, thus ensuring positioning accuracy. The first positioning pin is then driven by an adjusting rod, and an L-shaped groove is set to limit the movement path of the adjusting rod and the movement distance of the first positioning pin. The L-shaped groove can be set to be a regular L or an inverted L depending on the specific situation. On this basis, a first bolt is set to fix the first positioning pin. When the first positioning pin extends to the set position, the first bolt is tightened and abuts against the annular groove, keeping the first positioning pin fixed and fully ensuring the positioning accuracy of the first positioning pin.

[0013] Preferably, the second positioning component includes a mounting block installed on the adjusting end of the adjusting unit, a fixing block connected to the mounting block, a rotating rod rotatably connected to the fixing block, a second positioning pin disposed on the rotating rod, and a second bolt threaded through the rotating rod and connected to the fixing block, wherein the working end of the second positioning pin is located at the bottom.

[0014] The second locating pin is installed on the rotating rod and rotates together with the rotating rod. The working end of the second locating pin is located at the bottom. Before use, the second locating pin is rotated, and then the part is placed on the assembly fixture. The second locating pin is rotated again so that it is inserted into the locating hole of the part from top to bottom. Then the second bolt is tightened to fix the second locating pin, thereby achieving the positioning of the part. The second locating pin is suitable for situations where positioning from the bottom up is not possible, such as positioning a part mounted on another part, or a double-layer stamped part with only a locating hole at the top.

[0015] Preferably, the clamping unit includes a first connecting rod mounted on the adjusting end of the adjusting unit, a first clamping block connected to the first connecting rod, a second connecting rod connected to the first connecting rod, a second clamping block connected to the second connecting rod, and a third bolt threaded through the second clamping block and connected to the second connecting rod. Both the first clamping block and the second clamping block are provided with contoured abutment surfaces. When the third bolt is tightened, the second clamping block moves toward the first clamping block and clamps the part.

[0016] Both the first and second connecting rods serve to connect and extend. The first and second clamping blocks are working components. The second clamping block is movably connected to the second connecting rod. Under the adjustment of tightening the first bolt, the second clamping block approaches the first clamping block and clamps the part. Both the first and second clamping blocks are provided with contoured abutment surfaces. The shape of the contoured abutment surfaces is set according to the contour of the part being clamped, in order to increase the contact area and improve clamping stability.

[0017] Preferably, the clamping unit further includes a third connecting rod mounted on the adjusting end of the adjusting unit, a fourth connecting rod connected to the third connecting rod, a fourth bolt threaded to the fourth connecting rod, a limiting ring fitted on the fourth connecting rod, a quick clamp connected to the fourth connecting rod, and a third clamping block connected to the clamping end of the quick clamp. When the quick clamp clamps, the third clamping block moves toward the first clamping block and clamps the part.

[0018] The clamping unit also features a third clamping block for gripping. A fourth connecting rod connected to the third clamping block can be adjusted in position relative to the third connecting rod, thereby adjusting the clamping distance of the third clamping block. The fourth connecting rod is axially positioned by a limiting ring and circumferentially fixed by a fourth bolt. Furthermore, the third clamping block is driven by a quick-release clamp, resulting in higher clamping efficiency. Quick-release clamps are common clamping mechanisms in the mechanical field, and can be classified as horizontal or vertical clamps based on their clamping method, and as manual or automatic clamps based on their driving method, allowing for selection based on specific needs. The third clamping block also works in conjunction with the first clamping block for clamping, and is preferentially used for long-distance clamping. When the part is clamped at a distance, or when there is interference between the second clamping block and the part, the third clamping block is used. In cases where the contoured contact surface of the first clamping block is large, both the second and third clamping blocks can be used simultaneously to improve clamping stability.

[0019] Preferably, the clamping unit further includes an adjusting block connected to the first connecting rod, a slider connected to the first clamping block, a fifth bolt threaded to the slider, and an elastic element whose two ends respectively abut against the first connecting rod and the fifth bolt. The slider is slidably connected to the first connecting rod, the first connecting rod is provided with a transverse groove, the adjusting block is slidably disposed in the transverse groove, the sliding direction of the slider and the adjusting block are perpendicular to each other, the top of the adjusting block is provided with multiple adjusting working surfaces of different heights, and the slider abuts against the adjusting working surfaces under the elastic force of the elastic element.

[0020] The first clamping block can move relative to the first connecting rod as the slider moves. When the slider slides towards the adjusting block, it is restricted by the adjusting block, i.e., it abuts against the adjusting working surface of the adjusting block. When the slider slides away from the adjusting block, it compresses the elastic element and is also restricted by the fifth bolt. When the slider is not subject to external force adjustment, under the elastic force of the elastic element, the bottom of the slider abuts against the adjusting working surface. Therefore, by moving the position of the adjusting block, the slider can abut against the adjusting working surface at different heights, thus quickly adjusting the position of the first clamping block to achieve clamping of parts of different thicknesses. Furthermore, ramps are provided between the various adjusting working surfaces, so that the adjusting block can be directly pushed or pulled during adjustment.

[0021] Preferably, the adjustment unit includes a column detachably connected to the mounting plate, a support plate detachably connected to the column, a fixing plate detachably connected to the support plate, an adjustment plate detachably connected to the fixing plate, a first adjustment piece disposed between the fixing plate and the adjustment plate, a unit connecting block detachably connected to the adjustment plate, and a second adjustment piece. Limiting blocks are respectively provided on the first and second sides of the adjustment plate. The second adjustment piece is disposed between the limiting block and the side of the unit connecting block. The first and second sides are perpendicular to each other. The positioning unit and the clamping unit are respectively mounted on the unit connecting block.

[0022] The uprights serve a lifting function, with the lifting height depending on the part. For lower parts, the uprights can be omitted. The support plate provides support and also acts as a small mounting platform to simultaneously support multiple support units, positioning units, or clamping units. The first adjusting plate is located between the top of the fixed plate and the bottom of the adjusting plate. By adding, removing, or replacing the first adjusting plate with the same or different thicknesses, the height of the adjusting plate can be adjusted. Similarly, second adjusting plates are provided on the side of the limiting block and the adjusting plate to adjust the lateral and longitudinal positions of the adjusting plate. The unit connecting block is mounted on the adjusting plate, and the support unit, positioning unit, or clamping unit is mounted on the unit connecting block. The first and second adjusting plates can be used to make fine adjustments to the positions of the positioning unit and clamping unit, ensuring the installation accuracy of the support unit, positioning unit, and clamping unit, and thus ensuring the assembly accuracy of the body-in-white.

[0023] Preferably, the support unit includes support members symmetrically installed on the bottom bracket. The support members are generally L-shaped and the support surface is a horizontally set plane. The support members are installed in pairs.

[0024] In the support unit, the support components are installed in pairs, that is, the number of support components is even and they are symmetrically installed on the bottom bracket to ensure support accuracy.

[0025] Preferably, it further includes multiple lifting rings, multiple flipping components, and multiple wheels. The multiple lifting rings are respectively installed on the top of the bottom bracket, the multiple flipping components are respectively installed on the bottom of the bottom bracket, and the multiple wheels are respectively installed on the flipping end of the flipping component.

[0026] Wheels are provided for easy movement of the assembly fixture, and lifting rings are provided for easy lifting and moving of the assembly fixture and the assembled parts together, and placing them on other supports. Before the assembly fixture is lowered onto other supports, the wheels are flipped up by a flipping device, and then the assembly fixture is lowered to avoid interference between the wheels and other supports, thus facilitating the assembly of the parts.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] The support units, positioning units, and clamping units of this assembly fixture are set according to the individual parts of each component assembly, thereby supporting, positioning, and clamping all parts of each component assembly, ensuring the assembly accuracy of each part, facilitating assembly by workers, improving assembly efficiency, and also improving the overall assembly accuracy of each component assembly to meet assembly requirements. This avoids affecting the overall assembly accuracy of the body-in-white due to insufficient assembly accuracy of individual component assemblies, and ensures overall production efficiency. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a body-in-white assembly fixture according to this utility model;

[0030] Figure 2 This is a top view structural diagram of a body-in-white assembly fixture according to the present invention;

[0031] Figure 3 This is a schematic diagram of the adjustment unit structure of a body-in-white assembly fixture according to the present invention;

[0032] Figure 4 This is a schematic diagram of the clamping unit structure of a body-in-white assembly fixture according to this utility model;

[0033] Figure 5 This is an exploded view of the first positioning component of a body-in-white assembly fixture according to this utility model;

[0034] Figure 6 This is a schematic diagram of the first positioning component of a body-in-white assembly fixture according to the present invention;

[0035] Figure 7 This is a schematic diagram of the second positioning component of a body-in-white assembly fixture according to the present invention;

[0036] Figure 8 This is a schematic diagram of the flipping component structure of a body-in-white assembly fixture according to this utility model.

[0037] In the diagram: 1. Bottom bracket; 2. Side bracket; 3. Mounting plate; 4. Adjustment unit; 401. Column; 402. Support plate; 403. Fixing plate; 404. Adjustment plate; 404a. Limiting block; 405. First adjusting piece; 406. Unit connecting block; 407. Second adjusting piece; 5. Support unit; 6. Positioning unit; 7. Clamping unit; 701. First connecting rod; 701a. Transverse groove; 702. First clamping block; 703. Second connecting rod; 704. Second clamping block; 705. Third bolt; 706. Third connecting rod; 707. Fourth connecting rod; 708. Fourth bolt; 709. Limiting ring; 710. Quick clamp; 711. Third clamping block; 7 12. Adjusting block; 712a. Adjusting working surface; 713. Slider; 714. Fifth bolt; 715. Elastic element; 8. Position calibration element; 9. Locking element; 10. First positioning element; 1001. Vertical rod; 1001a. L-shaped groove; 1002. Reference block; 1002a. Supporting reference surface; 1003. First positioning pin; 1003a. Annular groove; 1004. Lowering block; 1005. Collar; 1006. Adjusting rod; 1007. First bolt; 11. Second positioning element; 1101. Mounting block; 1102. Fixing block; 1103. Rotating rod; 1104. Second positioning pin; 1105. Second bolt; 12. Lifting ring; 13. Tilting element; 14. Wheel. Detailed Implementation

[0038] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0039] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0040] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0041] Example 1

[0042] like Figure 1-2 As shown, a body-in-white assembly fixture includes: a bottom bracket 1, side brackets 2 slidably mounted on both sides of the bottom bracket 1, mounting plates 3 adjustablely mounted on the bottom bracket 1 and side brackets 2, adjustment units 4 detachably mounted on the mounting plates 3, support units 5 mounted on the adjustment ends of the adjustment units 4, positioning units 6 and clamping units 7, position calibration components 8 mounted on the mounting plates 3, and locking components 9 connected to the side brackets 2. The locking components 9 are used to fix the side brackets 2 to the bottom bracket 1. The positioning unit 6 includes a first positioning component 10 and a second positioning component 11. The bottom bracket 1 has a first positioning component 10 at each of its four corners and a second positioning component 11 in the middle. The side brackets 2 have a first positioning component 10. The working surface of the bottom bracket 1 is horizontal, and the working surface of the side brackets 2 is vertical. The adjustment unit 4 is three-way adjustable. The position calibration component 8 has a circular calibration groove.

[0043] Mounting plates 3 are installed on both the bottom bracket 1 and the side bracket 2. The mounting plates 3 are used to install the support unit 5, positioning unit 6, and clamping unit 7. The mounting plates 3 are adjustable, meaning their installation positions are not fixed and can be adjusted. Various installation methods are available, such as using clamps, providing multiple mounting holes on the bottom bracket 1 and side bracket 2, or using sliding grooves. Specifically, the bottom bracket 1 and side bracket 2 are preferably assembled using aluminum profiles with sliding mounting grooves for easy installation and adjustment. Furthermore, an adjustment unit 4 is provided, allowing the support unit 5, positioning unit 6, and clamping unit 7 to be installed on the adjustment end of the adjustment unit 4, thereby indirectly installing... On the mounting plate 3, the adjustment end of the adjustment unit 4 can be adjusted in three directions, thereby further improving the adjustability of the support unit 5, positioning unit 6 and clamping unit 7, and also achieving more precise position adjustment, further improving the working accuracy of the support unit 5, positioning unit 6 and clamping unit 7. This can be achieved using a three-axis displacement stage. The position calibration component 8 provides position and correction references for the installation positions of the support unit 5, positioning unit 6 and clamping unit 7. When this assembly fixture is initially assembled or the vehicle model is changed, a laser tracker is used with each position calibration component as a coordinate reference to determine and check the installation positions of the support unit 5, positioning unit 6 and clamping unit 7 to ensure installation accuracy.

[0044] Support unit 5 serves as an installation reference, supporting key components and ensuring installation accuracy. Positioning unit 6 provides positioning for components, including a first positioning element 10 and a second positioning element 11. The first positioning element 10 also has a support function and is arranged along the four corners of the bottom bracket 1 to maximize the support area and improve the positioning effect. Together with support unit 5, it provides overall support and positioning for each component assembly, ensuring the overall stability of each component assembly during assembly. The second positioning element 11 is located in the middle of the bracket, and the first positioning element 10 is also provided on the side bracket 2 to fix the component from the side, improving the positioning effect and positioning accuracy. Clamping unit 7 is used to clamp the component, ensuring that the component remains relatively stable during and after installation, ensuring component assembly accuracy. Support unit 5, positioning unit 6, and clamping unit 7 support, position, or clamp each component. Each component is provided with 2-4 support, positioning, or clamping points, thereby restricting the XYZ axes of each component, realizing the positioning and fixing of the component, and improving installation accuracy.

[0045] The side bracket 2 is slidably connected to the bottom bracket 1. When the side bracket 2 is not needed, it can be moved away to facilitate the assembly of other parts. When the side bracket 2 is needed, it can be moved back to its original position. After the side bracket 2 is moved away and after it is reset, it is fixed by the locking part 9. The locking part 9 can be a bolt, pin, buckle or lock.

[0046] The beneficial effects of this embodiment are as follows: Each support unit 5, positioning unit 6, and clamping unit 7 of this assembly fixture is set according to each part of each part assembly, thereby realizing the support, positioning, and clamping of all parts of each part assembly, ensuring the assembly accuracy of each part, facilitating assembly by workers, improving assembly efficiency, and also improving the overall assembly accuracy of each part assembly, meeting assembly requirements, avoiding the impact of insufficient assembly accuracy of each part assembly on the overall assembly accuracy of the body-in-white, and ensuring overall production efficiency.

[0047] Example 2

[0048] This embodiment further defines the features of Embodiment 1, and its difference from Embodiment 1 lies in:

[0049] like Figure 5-7As shown, the first positioning component 10 includes a vertical rod 1001 installed on the adjusting end of the adjusting unit 4, a reference block 1002 and a first positioning pin 1003 respectively connected to the vertical rod 1001, and a lower pressure block 1004 threadedly connected to the first positioning pin 1003. The reference block 1002 has a through hole at its axial center and a supporting reference surface 1002a at its top. The first positioning pin 1003 is located at the axial center of the reference block 1002. The first positioning pin 1003 has a threaded hole at its top axial center. The lower pressure block 1004 has a groove at its bottom axial center. When the lower pressure block 1004 is tightened, its bottom abuts against the supporting reference surface 1002a. The first positioning component 10 also includes a collar 1005, an adjusting rod 1006, and a first bolt 1007. The vertical rod 1001 has a hollow structure and two collars 1005 are provided at the axis. The first positioning pin 1003 is slidably connected to the collars 1005. The side of the vertical rod 1001 is provided with an L-shaped groove 1001a. The adjusting rod 1006 passes through the L-shaped groove 1001a and is connected to the first positioning pin 1003. The first positioning pin 1003 is provided with an annular groove 1003a. The first bolt 1007 is threadedly connected to the vertical rod 1001 and passes through the vertical rod 1001. When the first positioning pin 1003 moves to the set position, the first bolt 1007 abuts against the annular groove 1003a. The second positioning component 11 includes a mounting block 1101 installed on the adjusting end of the adjusting unit 4, a fixing block 1102 connected to the mounting block 1101, a rotating rod 1103 rotatably connected to the fixing block 1102, a second positioning pin 1104 set on the rotating rod 1103, and a second bolt 1105 threadedly connected to the fixing block 1102 through the rotating rod 1103. The working end of the second positioning pin 1104 is located at the bottom.

[0050] A reference block 1002 is installed on the top of the vertical rod 1001. The first positioning pin 1003 passes through the through hole of the reference block 1002 and is connected to the vertical rod 1001. The working end of the first positioning pin 1003 is provided with a positioning surface that matches the hole position of the part. The top of the reference block 1002 is provided with a support reference surface 1002a for supporting the part. When no part is placed, the lower pressure block 1004 is tightened and pressed down to contact the support reference surface 1002a. The first positioning pin 1003 is wrapped inside, which protects the working end of the first positioning pin 1003 and protects the positioning surface from bumps, ensuring positioning accuracy. When positioning the part, the part is fixed between the reference block 1002 and the lower pressure block 1004 by tightening and pressing down. It plays both a positioning role and a clamping role, resulting in a better positioning effect. It is suitable for large sheet metal parts with far positioning holes. The first positioning pin 1003 is made to be slidably adjustable, and a collar 1005 is used to ensure sliding accuracy and prevent the first positioning pin 1003 from shaking, thus ensuring positioning accuracy. The first positioning pin 1003 is then driven by an adjusting rod 1006. An L-shaped groove 1001a is set to limit the movement path of the adjusting rod 1006 and also to limit the movement distance of the first positioning pin 1003. The L-shaped groove 1001a is set to be either a regular L-shape or an inverted L-shape depending on the specific situation. On this basis, a first bolt 1007 is set to fix the first positioning pin 1003. When the first positioning pin 1003 extends to the set position, the first bolt 1007 is tightened and abuts against the annular groove 1003a, so that the first positioning pin 1003 remains fixed, thus fully ensuring the positioning accuracy of the first positioning pin 1003. The second positioning pin 1104 is mounted on the rotating rod 1103 and rotates together with the rotating rod 1103. The working end of the second positioning pin 1104 is located at the bottom. Before use, the second positioning pin 1104 is rotated, and then the part is placed on the assembly fixture. Then the second positioning pin 1104 is rotated again so that the second positioning pin 1104 is inserted into the positioning hole of the part from top to bottom. Then the second bolt 1105 is tightened to fix the second positioning pin 1104, thereby achieving the positioning of the part. The second positioning pin 1104 is suitable for situations where positioning cannot be performed from the bottom up, such as positioning parts mounted on top of another part, or double-layer stamped parts with positioning holes only at the top.

[0051] The remaining features and working principles of this embodiment are the same as those of Embodiment 1.

[0052] Example 3

[0053] Based on Example 1 or Example 2, Example 1 or Example 2 are further defined, with the following differences:

[0054] like Figure 4As shown, the clamping unit 7 includes a first connecting rod 701 mounted on the adjusting end of the adjusting unit 4, a first clamping block 702 connected to the first connecting rod 701, a second connecting rod 703 connected to the first connecting rod 701, a second clamping block 704 connected to the second connecting rod 703, and a third bolt 705 threaded through the second clamping block 704 and the second connecting rod 703. The first clamping block 702 and the second clamping block 704 are respectively provided with a contoured abutment surface. When the third bolt 705 is tightened, the second clamping block 704 moves toward the first clamping block 702 and clamps the part. The clamping unit 7 also includes a third connecting rod 706 mounted on the adjusting end of the adjusting unit 4, a fourth connecting rod 707 connected to the third connecting rod 706, a fourth bolt 708 threadedly connected to the fourth connecting rod 707, a limiting ring 709 fitted on the fourth connecting rod 707, a quick clamp 710 connected to the fourth connecting rod 707, and a third clamping block 711 connected to the clamping end of the quick clamp 710. When the quick clamp 710 clamps, the third clamping block 711 moves toward the first clamping block 702 and clamps the part. The clamping unit 7 also includes an adjusting block 712 connected to the first connecting rod 701, a slider 713 connected to the first clamping block 702, a fifth bolt 714 threadedly connected to the slider 713, and an elastic element 715 whose two ends abut against the first connecting rod 701 and the fifth bolt 714 respectively. The slider 713 is slidably connected to the first connecting rod 701. The first connecting rod 701 is provided with a transverse groove 701a. The adjusting block 712 is slidably disposed in the transverse groove 701a. The sliding directions of the slider 713 and the adjusting block 712 are perpendicular to each other. The top of the adjusting block 712 is provided with multiple adjusting working surfaces 712a of different heights. The slider 713 abuts against the adjusting working surfaces 712a under the elastic force of the elastic element 715.

[0055] Both the first connecting rod 701 and the second connecting rod 703 serve to connect and extend. The first clamping block 702 and the second clamping block 704 are working parts. The second clamping block 704 is movably connected to the second connecting rod 703. Under the adjustment of tightening the first bolt 1007, the second clamping block 704 approaches the first clamping block 702 and clamps the part. Both the first clamping block 702 and the second clamping block 704 are respectively provided with contoured abutment surfaces. The shape of the contoured abutment surfaces is set according to the contour of the part being clamped, in order to increase the contact area and improve the clamping stability. The clamping unit 7 is also equipped with a third clamping block 711 for clamping. The fourth connecting rod 707 connected to the third clamping block 711 can be adjusted in position relative to the third connecting rod 706, thereby adjusting the clamping distance of the third clamping block 711. The fourth connecting rod 707 is axially positioned by a limiting ring 709 and circumferentially fixed by a fourth bolt 708. In addition, the third clamping block 711 is driven by a quick clamp 710, which has higher clamping efficiency. The quick clamp 710 is a common clamping mechanism in the mechanical field. According to the clamping method, it can be divided into horizontal clamps and vertical clamps. According to the driving method, it can be divided into manual clamps or start-up clamps. The specific choice can be made according to the needs. The third clamping block 711 also works with the first clamping block 702 for clamping, and is preferentially used for long-distance clamping. When the part is clamped at a distance or when the second clamping block 704 interferes with the part, the third clamping block 711 is used for clamping. In some cases where the contour abutment surface of the first clamping block 702 is large, the second clamping block 704 and the third clamping block 711 can also be used simultaneously for clamping to improve clamping stability. The first clamping block 702 can move relative to the first connecting rod 701 along with the slider 713. When the slider 713 slides towards the adjusting block 712, it is restricted by the adjusting block 712, that is, it abuts against the adjusting working surface 712a of the adjusting block 712. When the slider 713 slides away from the adjusting block 712, it compresses the elastic element 715 and is also restricted by the fifth bolt 714. When the slider 713 is not adjusted by external force, under the elastic force of the elastic element 715, the bottom of the slider 713 abuts against the adjusting working surface 712a. Therefore, by moving the position of the adjusting block 712, the slider 713 can abut against the adjusting working surfaces 712a at different heights, thereby quickly adjusting the position of the first clamping block 702 to achieve clamping of parts of different thicknesses. Furthermore, ramps are provided between the various adjusting working surfaces 712a, so that the adjusting block 712 can be directly pushed or pulled during adjustment.

[0056] The remaining working principles and processes of this embodiment are the same as those of Embodiment 1 or Embodiment 2.

[0057] Example 4

[0058] Based on Example 1, Example 2, or Example 3, Example 1, Example 2, or Example 3 are further defined, with the following differences:

[0059] like Figure 3 As shown, the adjustment unit 4 includes a column 401 detachably connected to the mounting plate 3, a support plate 402 detachably connected to the column 401, a fixing plate 403 detachably connected to the support plate 402, an adjustment plate 404 detachably connected to the fixing plate 403, a first adjustment piece 405 disposed between the fixing plate 403 and the adjustment plate 404, a unit connecting block 406 detachably connected to the adjustment plate 404, and a second adjustment piece 407. Limiting blocks 404a are respectively provided on the first and second sides of the adjustment plate 404. The second adjustment piece 407 is disposed between the limiting block 404a and the side of the unit connecting block 406. The first and second sides are perpendicular to each other. The positioning unit 6 and the clamping unit 7 are respectively mounted on the unit connecting block 406. Figure 2 As shown, the support unit 5 includes support members symmetrically mounted on the bottom bracket 1. The support members are generally L-shaped with a horizontally oriented plane as the supporting surface. The support members are installed in pairs. Figure 1 , Figure 2 and Figure 8 As shown, it also includes multiple lifting rings 12, multiple flipping parts 13, and multiple wheels 14. The multiple lifting rings 12 are respectively installed on the top of the bottom bracket 1, the multiple flipping parts 13 are respectively installed on the bottom of the bottom bracket 1, and the multiple wheels 14 are respectively installed on the flipping end of the flipping parts 13.

[0060] The column 401 serves a lifting function, with the lifting height depending on the part. For lower parts, the column 401 can be omitted. The support plate 402 provides support and also acts as a small mounting platform to simultaneously support multiple support units 5, positioning units 6, or clamping units 7. The first adjusting plate 405 is located between the top of the fixed plate 403 and the bottom of the adjusting plate 404. By adding, removing, or replacing the first adjusting plate 405 with the same or different thicknesses, the height of the adjusting plate 404 can be adjusted. Similarly, the second adjusting plate 407 is provided on the side of the limiting block 404a and the adjusting plate 404 to adjust the lateral and longitudinal positions of the adjusting plate 404. The unit connecting block 406 is mounted on the adjusting plate 404, and the support unit 5, positioning unit 6, or clamping unit 7 is mounted on the unit connecting block 406. The first adjusting plate 405 and the second adjusting plate 407 can be used to make fine adjustments to the positions of the positioning unit and the clamping unit, ensuring the installation accuracy of the support unit 5, positioning unit 6, and clamping unit 7, and thus ensuring the assembly accuracy of the body-in-white. In support unit 5, the support components are installed in pairs, meaning there are an even number of support components, symmetrically mounted on the bottom bracket 1 to ensure support accuracy. Wheels 14 are provided for easy movement of the assembly fixture, and lifting rings 12 are provided to easily lift and move the assembly fixture and the assembled parts together, placing them on other brackets. Before the assembly fixture is lowered onto other brackets, the wheels 14 are flipped up by the flipping component 13, allowing the assembly fixture to fall, thus preventing interference between the wheels 14 and other brackets and facilitating the assembly of the various parts.

[0061] The remaining working principles and processes of this embodiment are the same as those of Embodiment 1, Embodiment 2, or Embodiment 3.

[0062] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0063] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A body-in-white assembly fixture, characterized in that, include: The system comprises: a bottom bracket (1); side brackets (2) slidably mounted on both sides of the bottom bracket (1); mounting plates (3) adjustablely mounted on the bottom bracket (1) and the side brackets (2); adjustment units (4) detachably mounted on the mounting plates (3); support units (5) mounted on the adjustment ends of the adjustment units (4); positioning units (6) and clamping units (7); position calibration components (8) mounted on the mounting plates (3); and locking components (9) connected to the side brackets (2), wherein the locking components (9) are used to secure the side brackets. (2) Fixed on the bottom bracket (1) respectively, the positioning unit (6) includes a first positioning element (10) and a second positioning element (11). The first positioning element (10) is provided at the four corners of the bottom bracket (1), the second positioning element (11) is provided in the middle of the bottom bracket (1), the first positioning element (10) is provided on the side bracket (2) respectively, the working surface of the bottom bracket (1) is set horizontally, the working surface of the side bracket (2) is set vertically, the adjustment unit (4) can be adjusted in three directions, and the position calibration element (8) is provided with a circular calibration groove.

2. The body-in-white assembly fixture according to claim 1, characterized in that: The first positioning component (10) includes a vertical rod (1001) installed on the adjusting end of the adjusting unit (4), a reference block (1002) and a first positioning pin (1003) respectively connected to the vertical rod (1001), and a lower pressure block (1004) threadedly connected to the first positioning pin (1003). The reference block (1002) has a through hole at its axis and a supporting reference surface (1002a) at its top. The first positioning pin (1003) is located at the axis of the reference block (1002). The first positioning pin (1003) has a threaded hole at the top axis. The lower pressure block (1004) has a groove at the bottom axis. When the lower pressure block (1004) is tightened, its bottom abuts against the supporting reference surface (1002a).

3. The body-in-white assembly fixture according to claim 2, characterized in that: The first positioning component (10) further includes a collar (1005), an adjusting rod (1006), and a first bolt (1007). The vertical rod (1001) has a hollow structure and two collars (1005) are provided at the center of the shaft. The first positioning pin (1003) is slidably connected to the collars (1005). The side of the vertical rod (1001) is provided with an L-shaped groove (1001a). The adjusting rod (1006) passes through the L-shaped groove (1001a) and is connected to the first positioning pin (1003). The first positioning pin (1003) is provided with an annular groove (1003a). The first bolt (1007) is threadedly connected to the vertical rod (1001) and passes through the vertical rod (1001). When the first positioning pin (1003) moves to the set position, the first bolt (1007) abuts against the annular groove (1003a).

4. The body-in-white assembly fixture according to claim 1, characterized in that: The second positioning component (11) includes a mounting block (1101) installed on the adjusting end of the adjusting unit (4), a fixing block (1102) connected to the mounting block (1101), a rotating rod (1103) rotatably connected to the fixing block (1102), a second positioning pin (1104) provided on the rotating rod (1103), and a second bolt (1105) threaded through the rotating rod (1103) and connected to the fixing block (1102). The working end of the second positioning pin (1104) is located at the bottom.

5. The body-in-white assembly fixture according to claim 1, characterized in that: The clamping unit (7) includes a first connecting rod (701) installed on the adjusting end of the adjusting unit (4), a first clamping block (702) connected to the first connecting rod (701), a second connecting rod (703) connected to the first connecting rod (701), a second clamping block (704) connected to the second connecting rod (703), and a third bolt (705) threaded through the second clamping block (704) and the second connecting rod (703). The first clamping block (702) and the second clamping block (704) are respectively provided with a contoured abutment surface. When the third bolt (705) is tightened, the second clamping block (704) moves toward the first clamping block (702) and clamps the part.

6. The body-in-white assembly fixture according to claim 5, characterized in that: The clamping unit (7) further includes a third connecting rod (706) installed on the adjusting end of the adjusting unit (4), a fourth connecting rod (707) connected to the third connecting rod (706), a fourth bolt (708) threadedly connected to the fourth connecting rod (707), a limiting ring (709) fitted on the fourth connecting rod (707), a quick clamp (710) connected to the fourth connecting rod (707), and a third clamping block (711) connected to the clamping end of the quick clamp (710). When the quick clamp (710) clamps, the third clamping block (711) moves toward the first clamping block (702) and clamps the part.

7. A body-in-white assembly fixture according to claim 5, characterized in that: The clamping unit (7) further includes an adjusting block (712) connected to the first connecting rod (701), a slider (713) connected to the first clamping block (702), a fifth bolt (714) threadedly connected to the slider (713), and an elastic element (715) with both ends abutting against the first connecting rod (701) and the fifth bolt (714) respectively. The slider (713) is slidably connected to the first connecting rod (701). The first connecting rod (701) is provided with a transverse groove (701a). The adjusting block (712) is slidably disposed in the transverse groove (701a). The sliding directions of the slider (713) and the adjusting block (712) are perpendicular to each other. The top of the adjusting block (712) is provided with multiple adjusting working surfaces (712a) of different heights. The slider (713) abuts against the adjusting working surface (712a) under the elastic force of the elastic element (715).

8. A body-in-white assembly fixture according to claim 1, characterized in that: The adjustment unit (4) includes a column (401) detachably connected to the mounting plate (3), a support plate (402) detachably connected to the column (401), a fixing plate (403) detachably connected to the support plate (402), an adjustment plate (404) detachably connected to the fixing plate (403), a first adjustment piece (405) disposed between the fixing plate (403) and the adjustment plate (404), a unit connecting block (406) detachably connected to the adjustment plate (404), and a second adjustment piece (407). The first side and the second side of the adjustment plate (404) are respectively provided with a limiting block (404a). The second adjustment piece (407) is disposed between the limiting block (404a) and the side of the unit connecting block (406). The first side and the second side are perpendicular to each other. The positioning unit (6) and the clamping unit (7) are respectively installed on the unit connecting block (406).

9. A body-in-white assembly fixture according to claim 1, characterized in that: The support unit (5) includes support members symmetrically installed on the bottom bracket (1). The support members are generally L-shaped and the support surface is a horizontally set plane. The support members are installed in pairs.

10. A body-in-white assembly fixture according to claim 1, characterized in that: It also includes multiple lifting rings (12), multiple flippers (13) and multiple wheels (14). The multiple lifting rings (12) are respectively installed on the top of the bottom bracket (1), the multiple flippers (13) are respectively installed on the bottom of the bottom bracket (1), and the multiple wheels (14) are respectively installed on the flipping end of the flippers (13).

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