Multi-vehicle frame and rear axle combined mounting rack

Abstract

The utility model discloses a multi-vehicle frame and rear axle combined rack which comprises a rack body, a first rear support, a second rear support, a third rear support and a fourth rear support which can be independently put down are arranged on the rear portion of the rack body, the first rear support and the fourth rear support form an L-series vehicle model rear support set, and the second rear support and the third rear support form a new high-series vehicle model rear support set. A first front support, a second front support and a third front support which can ascend and descend independently are arranged on the front portion, the second front support and the third front support form a two-seat / four-seat front support set, and the second front support, the third front support and the second front support jointly form a six-seat front support set. According to the utility model, the L-series rear support group and the new-high-series rear support group which can be put down independently are matched with the liftable two-seat / four-seat front support group and the liftable six-seat front support group, so that a single combined mounting rack can be adapted to five vehicle types, namely L2 seats / L4 seats / L6 seats and new-high two-seat / four seats, the combined mounting and sharing of frames and rear axles of multiple vehicle types are realized, the number of line edge tools is reduced, the line edge tidiness is improved, and the workshop space is greatly saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle assembly equipment technical field, concretely relates to a multi-vehicle type frame and rear axle combined bench. BACKGROUND

[0002] With the transformation of special vehicle industry to multi-variety, small-batch production mode, automobile manufacturing enterprises generally face the technical challenge of multi-vehicle type mixed production. In the frame and rear axle combined process link, the traditional solution adopts the "one vehicle one tooling" mode, that is, special combined benches are configured for L2 seat / L4 seat / L6 seat series, new high 2 seat / 4 seat and other different vehicle types. This technical solution has significant defects: first, 5 sets of independent tooling equipment corresponding to 5 vehicle types increase the storage area of line-side equipment, seriously restricting the workshop logistics efficiency and 5S management level; second, during the vehicle type switching process, the operator needs to perform a series of operations such as tooling disassembly, transportation, positioning and installation, and the single switching time is as long as 15 minutes, according to 4 times of daily change, the direct capacity loss is 6.7%. In addition, the rigid structure of the traditional fixed bench cannot adapt to the assembly requirements of different wheelbase vehicle types (such as 6 seat extended type), further limiting the flexibility level of the production line.

[0003] Although there are some adjustable toolings in the prior art, they generally have problems such as complex adjustment mechanism and positioning accuracy decay, which cannot meet the process requirement of ±0.5mm repeated positioning accuracy in the field of automobile manufacturing. Therefore, developing a multifunctional combined bench with the characteristics of rapid change, space-intensive and high-precision maintenance has become a breakthrough direction to improve the efficiency of mixed production of special vehicles. UTILITY MODEL CONTENTS

[0004] In order to overcome the above-mentioned defects of the frame and rear axle combined tooling, the utility model provides a multi-vehicle type frame and rear axle combined bench.

[0005] The technical scheme adopted by the utility model is as follows: a multi-vehicle type frame and rear axle combined bench, comprising: a bench body; a first rear support, a second rear support, a third rear support and a fourth rear support which are installed on the rear part of the bench body from back to front and can be independently laid down, the first rear support and the fourth rear support together form a rear support group for L series vehicle type, and the second rear support and the third rear support together form a rear support group for new high series vehicle type; a first front support, a second front support and a third front support which are installed on the front part of the bench body from front to back and can be independently lifted, the second front support and the third front support together form a front support group for 2 seat / 4 seat, and the first front support, the second front support and the third front support together form a front support group for 6 seat.

[0006] Preferably, the first rear support, the second rear support, the third rear support and the fourth rear support are each provided with two parts arranged on the left and right sides of the rear part of the rack body.

[0007] Preferably, the lower ends of the first rear support, the second rear support, the third rear support and the fourth rear support are hinged to the hinge seats on the rack body, and each of the first rear support, the second rear support, the third rear support and the fourth rear support is provided with a locking bolt between the hinge seat and the first rear support, the second rear support, the third rear support or the fourth rear support in the vertical supporting working position.

[0008] Preferably, the first front support, the second front support and the third front support are provided with door-shaped structures, and the legs of the door-shaped structures are provided with locking bolts between the legs and the plug-in seats on the rack body.

[0009] Preferably, the front part of the rack body is provided with a sub-rack movable forward and backward, and the sub-rack and the rack body are provided with a locking bolt.

[0010] Preferably, the top parts of the first rear support, the second rear support, the third rear support, the fourth rear support, the first front support, the second front support and the third front support are provided with support contact blocks made of hard plastic, and the shapes of the support contact blocks are matched with the contact parts of the frame or the rear axle.

[0011] Preferably, the rack body is provided with a positioning support, and the top part of the positioning support is provided with a positioning pin.

[0012] Preferably, the rack body is welded by square tubes with a size of 50mm*50mm.

[0013] Preferably, the rack body is provided with tool grooves arranged in an upper and lower mode and a bottom surface, the tool grooves are provided in a grid shape, and the tool grooves are arranged below the rear support groups of the L series vehicles and the rear support groups of the new high series vehicles.

[0014] Preferably, the rear end of the rack body is provided with a push rod, and the bottom part is uniformly provided with a plurality of casters.

[0015] The utility model has the following beneficial effects:

[0016] 1. Multi-model compatibility improvement: through the independently tiltable L series and the new high series rear support group, in combination with the 2-seat / 4-seat and 6-seat front support group which can be lifted, a single assembly rack can adapt to L2-seat / L4-seat / L6-seat, new high 2-seat / 4-seat, a total of 5 vehicle models, realizing multi-model frame and rear axle assembly sharing, reducing the number of line edge tooling, improving the line edge neatness, and greatly saving the workshop space;

[0017] 2. Quick model change: the rear support rotation and tilting and the front support plug-in and lifting structure cooperate with the locking latch, and the switching time is shortened to 3 minutes according to different vehicle models, meeting the high-frequency model change requirement;

[0018] 3. High-precision positioning and holding: the positioning pin of the positioning support cooperates with the positioning hole on the frame to ensure the repeat positioning accuracy of the frame and the rear axle assembly, which is better than the industry standard;

[0019] 4. Balance between structural rigidity and lightweight: the 50mm*50mm square tube welded frame realizes that the rack body bearing capacity is greater than or equal to 2 tons, and the self weight is controlled to be less than 100kg, and in combination with the wheel and push rod design, a single person can complete the transfer of the rack;

[0020] 5. Axle expansion adaptability: the sub-rack can be moved forward and backward to adjust, supporting special axle distance models such as 6-seat extended models, and improving the flexibility level of the production line;

[0021] 6. Operation space optimization: the grid-shaped tool groove is integrated in the rack body, improving the tool taking and placing efficiency, and avoiding the 5S management problem caused by the scattering of parts. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of an embodiment of the utility model (the rear support group of the new high series vehicle model is in a vertical support state).

[0023] Figure 2 is a structural schematic view of an embodiment of the utility model (the rear support group of the L series vehicle model is in a vertical support state).

[0024] Figure 3 is a schematic view of the first rear support, the second rear support, the third rear support, the fourth rear support and the positioning support in an embodiment of the utility model.

[0025] Figure 4 is a schematic view of the first front support and the sub-rack in an embodiment of the utility model.

[0026] Figure 5 is a schematic view of an embodiment of the utility model applied to the new high series vehicle model.

[0027] Figure 6 is a schematic view of an embodiment of the utility model applied to the L series vehicle model.

[0028] In the diagram: 1. Frame body; 2. First rear support; 3. Second rear support; 4. Third rear support; 5. Fourth rear support; 6. First front support; 7. Second front support; 8. Third front support; 9. Hinge seat; 10. Locking pin; 11. Plug seat; 12. Subframe; 13. Support contact block; 14. Positioning support; 15. Positioning pin; 16. Tool slot; 17. Bottom platform; 18. Push rod; 19. Caster wheel; 20. New High series frame; 21. L series frame. Detailed Implementation

[0029] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0030] In the embodiments, such as Figures 1-4 As shown, this is a multi-model chassis and rear axle assembly bench, comprising: a bench body 1; a first rear support 2, a second rear support 3, a third rear support 4, and a fourth rear support 5, which are installed sequentially from rear to front at the rear of the bench body 1 and can be independently folded down, wherein the first rear support 2 and the fourth rear support 5 together form the rear support group for L-series models, and the second rear support 3 and the third rear support 4 together form the rear support group for the new high-end models; and a first front support 6, a second front support 7, and a third front support 8, which are installed sequentially from front to rear at the front of the bench body 1 and can be independently raised and lowered, wherein the second front support 7 and the third front support 8 together form a 2-seat / 4-seat front support group, and the first front support 6, the second front support 7, and the third front support 8 together form a 6-seat front support group. This embodiment adopts a modular support combination. With the independently foldable L-series and Xingao series rear support groups, combined with the height-adjustable 2-seat / 4-seat and 6-seat front support groups, a single assembly stand can be adapted to five models, including L2-seat / L4-seat / L6-seat and Xingao 2-seat / 4-seat. This enables the shared assembly of chassis and rear axles for multiple models, reduces the number of tooling on the line, improves line cleanliness, greatly saves workshop space, and significantly improves mixed-line production efficiency.

[0031] In the embodiments, such as Figures 1-2 As shown, there are two of each of the following: the first rear support 2, the second rear support 3, the third rear support 4, and the fourth rear support 5, which are respectively arranged on the left and right sides of the rear of the platform body 1. The symmetrical layout of the double supports makes the force more balanced and improves the stability of the support.

[0032] In the embodiments, such as Figure 3 As shown, the lower ends of the first rear support 2, the second rear support 3, the third rear support 4, and the fourth rear support 5 are hinged to the hinge seats 9 on the frame body 1. Each of them has two working positions: vertical support and rotational folding. When in the vertical support working position, a locking pin 10 is provided between the support and the hinge seat 9. This embodiment uses a rotational folding mechanism in conjunction with a locking pin to enable rapid switching of the support state. The mechanical locking structure ensures no displacement during load-bearing and guarantees assembly accuracy.

[0033] In the embodiments, such asFigure 1 , Figure 2 , Figure 4 As shown, the first front support 6, the second front support 7, and the third front support 8 are portal-type structures. The outriggers on both sides are height-adjustable and can be inserted into the connectors 11 on the frame body 1. A locking pin 10 is provided between the outriggers and the connectors 11. The portal-type structure can provide a large adjustment distance for lifting, more balanced force distribution, and adapt to the needs of various wheelbase models.

[0034] In the embodiments, such as Figure 1 , Figure 2 , Figure 4 As shown, a movable sub-stand 12 is installed at the front of the main stand 1, and a locking pin 10 is provided between the sub-stand 12 and the main stand 1. The sub-stand 12 is equipped with a plug-in sliding structure to extend the length of the main stand 1, meeting the assembly requirements of extended 6-seater models. When not in use, it is also easy to store and fold away.

[0035] In the embodiments, such as Figure 3 As shown, each support has a rigid plastic support contact block 13 at its top, the shape of which is adapted to the contact area of ​​the frame or rear axle. Specifically, the support contact blocks 13 at the top of the first rear support 2 and the fourth rear support 5 have rectangular slots for mating with the shock absorber springs of the L-series models; the support contact blocks 13 at the top of the second rear support 3 and the third rear support 4 have semi-circular slots for mating with the frame tubes of the new high-end models; the first front support 6, the second front support 7, and the third front support 8 have elongated support contact blocks 13 to accommodate frames with various wheelbases. The support contact blocks 13 can be made of nylon or PTFE, which has sufficient hardness while avoiding scratches caused by metal-to-metal contact.

[0036] In the embodiments, such as Figure 3 As shown, a positioning support 14 is installed on the test bench body 1, and a positioning pin 15 is provided on the top, located between the second rear support 3 and the third rear support 4. The positioning pin 15 cooperates with the process hole on the rear axle or frame to ensure the precise positioning of the rear axle and the test bench body 1, and the frame and the test bench body 1.

[0037] In the embodiments, such as Figure 1 , Figure 2 As shown, the main body 1 of the platform is welded from 50mm×50mm square tubes. The 1.5~2mm thick square tubes form a grid-like frame, which has sufficient strength and rigidity, improves the overall structural load-bearing capacity of the main body 1, and combines strength and lightness.

[0038] In the embodiments, such as Figure 1 , Figure 2As shown, the gantry body 1 has a grid-shaped tool slot 16 arranged above and below and a bottom table 17 arranged below the rear support group. The tool slot 16 is provided with 8 slots for storing high-frequency tools such as torque wrenches, locking pins 10, positioning pins 15 and accessories for assembly procedures; the bottom table 17 is used to place tools or accessories with lower frequency. The tool slot 16 and the bottom table 17 can improve the efficiency of taking and placing, and avoid the 5S management problem caused by the scattering of parts.

[0039] In the embodiment, as shown, the gantry body 1 is provided with a push rod 18 at the rear end, and 6 casters 19 are uniformly arranged at the bottom. The height range of the push rod 18 is 800-1100mm, the casters 19 are universal wheels with brake structure, and the push rod 18 cooperates with the casters 19, so that a single person can complete the transfer of the gantry, which is convenient to operate.

[0040] In the embodiment, as shown in Figure 5 , 6 The actual operation steps of the multi-model frame and rear axle assembly gantry are as follows:

[0041] Step 1. Model switching preparation: confirm the target model according to the production plan, and release the locking pins 10 of each support;

[0042] Step 2. Rear support group adjustment: for L series vehicles, raise the first rear support 2 and the fourth rear support 5, and insert the locking pin 10; for new high series vehicles, raise the second rear support 3 and the third rear support 4, and lower the remaining rear supports;

[0043] Step 3. Front support group configuration: for 2 / 4 seat vehicles, raise the second front support 7 and the third front support 8 to the designated height and lock; for 6 seat vehicles, move the auxiliary gantry 12 forward and lock, and raise the first front support 6, the second front support 7 and the third front support 8 and lock;

[0044] Step 4. Positioning assembly: hoist the rear axle to the positioning support 14, accurately position, then hoist the frame into place, complete the bolt connection with the frame, and complete the assembly after calibration;

[0045] Step 5. Reset and arrange: after the operation is completed, lower all the supports, retract the auxiliary gantry 12, and arrange the tools to the tool slot 16.

[0046] Obviously, the above embodiments of the utility model are only examples for illustrating the utility model, and are not a limitation on the embodiments of the utility model. Other obvious changes or variations derived from the essential spirit of the utility model still belong to the protection scope of the utility model.

Claims

1. A multi-vehicle type frame and rear axle assembly bench, characterized by comprising: The utility model relates to a kind of vehicle frame, including: Rack body (1); First rear support (2), second rear support (3), third rear support (4) and fourth rear support (5) are installed in the rear of rack body (1) in turn from back to front, and first rear support (2) and fourth rear support (5) together form L series vehicle rear support group, and second rear support (3) and third rear support (4) together form new high series vehicle rear support group; First front support (6), second front support (7) and third front support (8) are installed in the front of rack body (1) in turn from front to back, and second front support (7) and third front support (8) together form 2 / 4 seat front support group, and first front support (6), second front support (7) and third front support (8) together form 6 seat front support group.

2. The multi-vehicle-type frame and rear axle assembly station of claim 1, wherein: First rear support (2), second rear support (3), third rear support (4) and fourth rear support (5) are both two pieces, and are arranged on the left and right sides of the rear of rack body (1).

3. The multi-vehicle-type frame and rear axle assembly station according to claim 1 or 2, characterized in that, The lower end of first rear support (2), second rear support (3), third rear support (4) and fourth rear support (5) is hinged in hinge seat (9) on rack body (1), and both has vertical support and two kinds of working positions of rotary laying down; When first rear support (2), second rear support (3), third rear support (4) and fourth rear support (5) are in vertical support working position, locking bolt (10) is arranged between them and hinge seat (9).

4. The multi-vehicle-type frame and rear axle assembly station of claim 1, wherein: First front support (6), second front support (7) and third front support (8) are door type structure, and the leg of both sides can be lifted and is inserted in insertion seat (11) on rack body (1), and locking bolt (10) is arranged between the leg and insertion seat (11).

5. The multi-vehicle-type frame and rear axle assembly station of claim 1, wherein: Rack body (1) is installed with movable vice rack (12) in front, and locking bolt (10) is arranged between vice rack (12) and rack body (1).

6. The multi-vehicle-type frame and rear axle assembly station of claim 1, wherein, The top of first rear support (2), second rear support (3), third rear support (4), fourth rear support (5), first front support (6), second front support (7) and third front support (8) is provided with support contact block (13), support contact block (13) is made of hard plastic, and the shape of support contact block (13) is adapted to the contact part of frame or rear axle.

7. The multi-vehicle-type frame and rear axle assembly station of claim 1, wherein, Positioning support (14) is installed on rack body (1), positioning pin (15) is arranged on the top of positioning support (14), and positioning support (14) is located between second rear support (3) and third rear support (4).

8. The multi-vehicle-type frame and rear axle assembly station of claim 1, wherein, Rack body (1) is welded by 50mm×50mm square tube.

9. The multi-vehicle-type frame and rear axle assembly station according to claim 1 or 8, wherein, Rack body (1) has tool groove (16) and bottom platform (17) arranged in upper and lower, tool groove (16) is in grid shape, and is arranged below L series vehicle rear support group and new high series vehicle rear support group.

10. The multi-vehicle-type frame and rear axle assembly station of claim 1, wherein, The rear end of the gantry body (1) is provided with a push rod (18), and the bottom is uniformly provided with a plurality of casters (19).

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