Multi-vehicle-type top cover flexible positioning system

Abstract

The invention discloses a multi-vehicle-type top cover flexible positioning system which comprises two flexible positioning clamps, a top cover positioning gripper, a positioning trolley and a conveying roller bed, the two flexible positioning clamps are arranged on the two sides of the positioning trolley respectively, and each flexible clamp comprises a lower vehicle body clamp frame. The lower vehicle body clamp frame is connected with a first guide rail, a first switching sliding table, a fourth locking air cylinder, an eighth limiting block, a ninth limiting block, a first switching air cylinder and a second limiting air cylinder, the first switching sliding table is slidably connected to the first guide rail, and the first switching air cylinder is used for driving the first switching sliding table to move along the first guide rail; the first switching sliding table is connected with a first locking air cylinder, a second locking air cylinder, a third locking air cylinder, a first limiting air cylinder, a second guide rail, a second switching sliding table, a second switching air cylinder, a fourth limiting block, a fifth limiting block, a first positioning pin and a third clamping unit.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile assembly, and in particular relates to a flexible positioning system for top covers of multiple vehicle models. Background Art

[0002] As the heavy-duty truck industry's body-in-white platform is being updated at an increasingly rapid pace, the space requirements for the body-in-white are becoming increasingly higher. The existing method of loading the top cover is that the self-propelled hoist transports the top cover assembly to the body assembly station, and the self-propelled hoist lowers the top cover to achieve installation with the lower body. This method is suitable for a single top cover assembly and cannot meet the positioning of top cover assemblies of multiple body-in-whites with different heights, lengths, and widths. In addition, the relative position between the body-in-white and the accumulation chain is poor, and the relative accuracy of the top cover and the lower body cannot be guaranteed. Manual adjustments are required at the assembly station or repairs are performed during the assembly of the cab assembly. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the patent of the present invention provides a flexible positioning system for the top covers of multiple vehicle models, which solves the problem that the existing lifting devices cannot adapt to a variety of vehicle covers.

[0004] In order to solve the above problems existing in the prior art, the technical solution adopted by the present invention is:

[0005] A flexible positioning system for top covers of multiple vehicle types comprises a flexible positioning fixture, a top cover positioning gripper, a positioning trolley and a conveying roller bed.

[0006] The flexible positioning clamps are provided with two, and the two flexible positioning clamps are respectively arranged on both sides of the positioning trolley, and the flexible clamps include a lower body clamp frame, and the lower body clamp frame is connected with a first guide rail, a first switching slide, a fourth locking cylinder, an eighth limit block, a ninth limit block, a first switching cylinder, and a second limit cylinder, the first switching slide is slidably connected to the first guide rail, and the first switching cylinder is used to drive the first switching slide to move along the first guide rail.

[0007] The first switching slide is connected to the first locking cylinder, the second locking cylinder, the third locking cylinder, the first limit cylinder, the second guide rail, the second switching slide, the second switching cylinder, the fourth limit block, the fifth limit block, the first positioning pin and the third clamping unit, the second switching slide is slidably connected to the second guide rail, and the second switching cylinder drives the second switching slide to move along the second guide rail.

[0008] The second switching slide is connected with a first limit block, a second limit block, a third limit block, a first clamping unit, and a twelfth limit block to fix the body-in-white and fix the spatial dimensions of the body-in-white.

[0009] Furthermore, the eighth limit block and the ninth limit block are respectively connected to the two ends of the lower body clamp frame, and are both used to limit the X direction of the first switching slide, where the X direction refers to the moving direction of the first switching slide, the second limit cylinder is arranged on the side of the lower body clamp frame connected to the ninth limit block, the second locking cylinder is arranged between the first locking cylinder and the third locking cylinder, the third locking cylinder is arranged between the second locking cylinder and the first limit cylinder, the first switching cylinder and the second switching cylinder are vertically arranged, and the vertical here means eccentric vertical, through the cooperation of the first switching cylinder and the second switching cylinder, the second switching slide can be driven to move along the X / Y direction, the fourth limit block and the fifth limit block are both used to limit the Y direction of the second switching slide, where the Y direction refers to the moving direction of the second switching slide, and the first positioning pin is arranged at the top of the first switching slide.

[0010] Furthermore, the top cover positioning gripper is connected to a flexible positioning fixture, and the top cover positioning gripper includes a gripper body frame, and the gripper body frame is connected with a top cover gripper rear positioning block, a top cover front positioning block, a suction cup, a second clamping unit, a second positioning pin and a detection switch, and the top cover gripper rear positioning block and the top cover front positioning block are both connected to the flexible positioning fixture, and the suction cup and the second clamping unit are used to clamp the car cover, and the positioning trolley includes a third positioning pin, a trolley body, a coding ruler and a tenth limit block, and the third positioning pin, the coding ruler and the tenth limit block are all installed on the trolley body, and the third positioning pin is used to position the car cover. Through the positioning combination of the top cover positioning gripper and the flexible chemical equipment, the three-dimensional size positioning of different vehicle models (top cover and lower body) is achieved, and the positioning accuracy of the top cover assembly reaches ±1.0mm.

[0011] Furthermore, a switching mechanism and a limiting mechanism are provided on the flexible positioning fixture. By switching the limiting block and the locking mechanism, positioning switching of different lengths (1700mm, 2000mm, 3000mm) and different widths (2300mm, 2500mm) can be achieved, and the positioning accuracy reaches ±0.1mm.

[0012] Furthermore, the conveying roller bed is arranged at the lower side of the positioning trolley, and the conveying roller bed includes a roller bed body, and the roller bed body is connected with an eleventh limit block, a fourth positioning pin, a first limit wheel, and an encoder, and the encoder is used to read the coding ruler.

[0013] Furthermore, it also includes a robot, the robot is connected to the robot base, the top cover positioning gripper is connected to the flexible positioning fixture, and the positioning trolley is connected to the conveying roller bed.

[0014] The beneficial effects of the present invention are:

[0015] The present invention positions the body-in-white on a flexible trolley, and transports it to the final assembly station via a conveying roller bed. The roller bed drops to position the trolley, that is, the body-in-white. By switching the X-axis limit block, the positioning of vehicle models with different lengths is achieved, and then the Y-axis limit block is switched to achieve the positioning of vehicle models with different widths.

[0016] After the top cover positioning gripper of the present invention grasps the top cover assembly, it is installed on the positioning pin and positioning surface of the flexible positioning fixture to achieve three-dimensional dimensional positioning between the gripper and the tooling, that is, also achieve three-dimensional dimensional positioning between the top cover assembly and the lower body assembly.

[0017] After welding is completed, the gripper and the tooling are opened respectively, and finally the roller bed is raised and the trolley is transported to the next welding station.

[0018] The present invention adopts a flexible positioning fixture to achieve flexible switching of different lengths and widths, and the positioning accuracy can reach ±0.1mm. It has the advantages of being fast, simple, and high-precision.

[0019] The positioning gripper of the present invention can adapt to the positioning and grasping of top covers of different lengths, widths, heights, etc. according to different vehicle models, and realizes the spatial three-dimensional positioning of different white bodies through mutual positioning with the flexible positioning fixture, and finally realizes the accuracy of the top cover on the white body to reach ±1.0mm.

[0020] The present invention can ensure the positioning consistency of different vehicle models in subsequent production, the uniformity of conveying equipment, tooling, grippers, etc. through this technology, improve the maintainability of equipment and tooling, and the flexibility of positioning different top covers, thereby reducing the repeated investment costs caused by the introduction of new vehicle models in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 for Figure 1 Schematic diagram of the single-side structure of the flexible positioning fixture Figure 1 ;

[0023] Figure 3 Schematic diagram of the single-side structure of the flexible positioning fixture Figure 2 ;

[0024] Figure 4 for Figure 3 A partial enlarged view of part A;

[0025] Figure 5 It is a partial schematic diagram of the flexible positioning fixture;

[0026] Figure 6 The structure diagram of the positioning trolley Figure 1 ;

[0027] Figure 7 The structure diagram of the positioning trolley Figure 2 ;

[0028] Figure 8 Structural diagram of the top cover positioning gripper Figure 1 ;

[0029] Fig. 9 Structural diagram of the top cover positioning gripper Figure 2 ;

[0030] Fig.10 for Fig. 9 A partial enlarged view of part B;

[0031] Fig.11 Schematic diagram of the structure of the conveyor roller bed Figure 1 ;

[0032] Fig.12 Schematic diagram of the structure of the conveyor roller bed Figure 2 .

[0033] In the figure: 1-flexible positioning fixture; 2-top cover positioning gripper; 3-positioning trolley; 4-conveying roller bed; 5-first limit block; 6-first locking cylinder; 7-second locking cylinder; 8-third locking cylinder; 9-first limit cylinder; 10-second limit block; 11-third limit block; 12-fourth limit block; 13-fifth limit block; 14-lower body fixture frame; 15-sixth limit block; 16-first positioning pin; 17-second limit cylinder; 18-eighth limit block; 19-first switching cylinder; 20-fourth locking cylinder; 21-first switching slide; 22-second switching cylinder ;23-second switching slide;24-first clamping unit;25-top cover gripper rear positioning block;26-top cover front positioning block;27-suction cup;28-second clamping unit;29-second positioning pin;30-third positioning pin;31-trolley body;32-encoding ruler;33-tenth limit block;34-eleventh limit block;35-fourth positioning pin;36-first limit wheel;37-encoder;38-roller bed body;39-ninth limit block;40-gripper body frame;41-detection switch;45-twelfth limit block;46-third clamping unit;47-fifth locking cylinder. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the accompanying drawings and the accompanying drawings.

[0035] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0036] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0039] Embodiment 1:

[0040] like Figure 1-12 As shown, a flexible positioning system for top covers of multiple vehicle types includes a flexible positioning fixture 1, a top cover positioning gripper 2, a positioning trolley 3, and a conveying roller bed 4.

[0041] There are two flexible positioning clamps 1, which are respectively arranged on both sides of the positioning trolley 3. The flexible clamp includes a lower body clamp frame 14, and the lower body clamp frame 14 is connected to a first guide rail (not marked in the figure), a first switching slide 21, a fourth locking cylinder 20, an eighth limit block 18, a ninth limit block 39, a first switching cylinder 19, and a second limit cylinder 17. The first switching slide 21 is slidably connected to the first guide rail, and the first switching cylinder 19 is used to drive the first switching slide 21 to move along the first guide rail.

[0042] The first switching slide 21 is connected to the first locking cylinder 6, the second locking cylinder 7, the third locking cylinder 8, the first limit cylinder 9, the second guide rail (not marked in the figure), the second switching slide 23, the second switching cylinder 22, the fourth limit block 12, the fifth limit block 13, the first positioning pin 16 and the third clamping unit 46. The second switching slide 23 is slidably connected to the second guide rail, and the second switching cylinder 22 drives the second switching slide 23 to move along the second guide rail.

[0043] The second switching slide 23 is connected with the first limit block 5, the second limit block 10, the third limit block 11, the first clamping unit 24, and the twelfth limit block 45 to fix the body-in-white and fix the spatial dimensions of the body-in-white.

[0044] Embodiment 2:

[0045] On the basis of Example 1, the eighth limit block 18 and the ninth limit block 39 are respectively connected to the two ends of the lower body clamp frame 14, and are both used to limit the X direction of the first switching slide 21, where the X direction refers to the moving direction of the first switching slide 21.

[0046] The second limiting cylinder 17 is disposed on one side of the lower body clamp frame 14 connected to the ninth limiting block 39 .

[0047] The second locking cylinder 7 is disposed between the first locking cylinder 6 and the third locking cylinder 8 , and the third locking cylinder 8 is disposed between the second locking cylinder 7 and the first limit cylinder 9 .

[0048] The first switching cylinder 19 and the second switching cylinder 22 are vertically arranged, and the verticality here means skewed verticality. Through the cooperation of the first switching cylinder 19 and the second switching cylinder 22, the second switching slide 23 can be driven to move along the X / Y direction.

[0049] The fourth limiting block 12 and the fifth limiting block 13 are both used to limit the second switching slide 23 in the Y direction, where the Y direction refers to the moving direction of the second switching slide 23 .

[0050] The first positioning pin 16 is disposed on the top of the first switching slide 21 .

[0051] Embodiment 3:

[0052] On the basis of Example 2, the top cover positioning gripper 2 is connected to the flexible positioning fixture 1, and the top cover positioning gripper 2 includes a gripper body frame 40, and the gripper body frame 40 is connected with a top cover gripper rear positioning block 25, a top cover front positioning block 26, a suction cup 27, a second clamping unit 28, a second positioning pin 29 and a detection switch 41, and the top cover gripper rear positioning block 25 and the top cover front positioning block 26 are both connected to the flexible positioning fixture 1, and the suction cup 27 and the second clamping unit 28 are used to clamp the car cover.

[0053] Embodiment 4:

[0054] On the basis of Example 3, the positioning trolley 3 includes a third positioning pin 30, a trolley body 31, a coding ruler 32 and a tenth limit block 33. The third positioning pin 30, the coding ruler 32 and the tenth limit block 33 are all installed on the trolley body 31, and the third positioning pin 30 is used to position the hood.

[0055] The conveying roller bed 4 is arranged at the lower side of the positioning trolley 3, and the conveying roller bed 4 includes a roller bed body 38, and the roller bed body 38 is connected with an eleventh limit block 34, a fourth positioning pin 35, a first limit wheel 36, and an encoder 37, and the encoder 37 is used to read the code ruler 32.

[0056] Also included is a robot connected to the robot base.

[0057] The top cover positioning gripper 2 is connected to the flexible positioning fixture 1 .

[0058] The positioning trolley 3 is connected to the conveying roller bed 4 .

[0059] Specific working principle:

[0060] When the positioning trolley 3 carrying the BIW enters the assembly station, the control system drives the conveying roller 4 to transport the positioning trolley 3. The encoder 37 reads the code ruler 32 to stop the positioning trolley 3 above the first positioning pin 16. The control system drives the conveying roller 4 to fall until the tenth limit block 33 and the eleventh limit block 34 come into contact and stop. The first positioning pin 16 and the first limit wheel 36 limit the positioning trolley 3 in the X and Y directions, and the eleventh limit block 34 limits the positioning trolley 3 in the Z direction, and finally the positioning of the BIW is achieved. According to the production model, the control system drives the flexible positioning fixture 1 to switch, and the second switching slide 23 realizes the X-direction length switching of the model:

[0061] When producing a top cover with a length of 2300 mm in the X direction, the first limit block 5 and the sixth limit block 15 are in contact, and the second locking cylinder 7 is locked;

[0062] When producing a top cover with a length of 2000 mm in the X direction, the first limit cylinder 9 contacts the fifth limit block 13, the second switching slide 23 moves, the second limit block 10 contacts the first limit cylinder 9, and the first locking cylinder 6 locks;

[0063] When producing a top cover with a length of 1700 mm in the X direction, the second switching slide 23 moves, the third limit block 11 contacts the fourth limit block 12, and the third locking cylinder 8 locks, thereby finally realizing the switching of different lengths in the X direction;

[0064] After the second switching slide 23 is moved and switched, the first switching cylinder 19 pushes 21-the first switching slide 21 moves along the Y direction:

[0065] When the vehicle width is 2500 mm, the first switching slide 21 moves and contacts the ninth limit block 39, and the fourth locking cylinder 20 locks;

[0066] When the vehicle width is 2300mm, the second limit cylinder 17 is clamped and contacts the ninth limit block 39 to form a limit, the first switching slide 21 moves and contacts the ninth limit block 39, and the fifth locking cylinder 47 is locked, and finally the positioning switching of different widths in the Y direction is realized. According to the planning and process requirements of a new product of a certain vehicle model, 7 types of flexible positioning of the top cover assembly need to be met, as shown in the following table:

[0067] Model high length width Top cover A 0 1700 2300 Top cover B 36 2000 2300 Top cover C 64 2000 2300 Top cover D 36 2300 2300 Top cover E 64 2300 2300 Top cover F 36 2300 2500 Top cover G 112 2300 2500

[0068] According to the vehicle model information, the control system drives the robot to grab the top cover positioning gripper 2, the top cover assembly corresponding to the top cover positioning gripper 2, the second positioning pin 29 positions the top cover, the second clamping unit 28 fixes the top cover and prevents the top cover from falling to ensure the safety of personnel, the suction cup 27 fixes other areas of the top cover, and the detection switch 41 identifies the type of the top cover to determine whether the top cover meets the production requirements. The robot 43 installs the top cover positioning gripper 2 on the flexible positioning fixture 1, the first positioning pin 16 is combined with the top cover front positioning block 26 to achieve the X-direction and Y-direction positioning of the top cover positioning gripper 2, the twelfth limit block 45 is combined with the top cover gripper rear positioning block 25 to achieve the Z-direction positioning of the top cover positioning gripper 2, and the positioning between different top cover assemblies and the body-in-white is achieved by switching different top cover positioning grippers 2. After the top cover positioning gripper 2 is installed in place, the first clamping unit 24 and the third clamping unit 46 on the flexible positioning fixture 1 are clamped to fix the top cover assembly and the lower body, and then the robot 43 performs welding. After welding, the first clamping unit 24 and the third clamping unit 46 are opened, the robot 43 positions and removes the top cover, the second switching slide 23 and the first switching slide 21 are all opened, and the control system 42 drives the conveying roller 4 and the flexible trolley to rise, and then the conveying roller 4 conveys the flexible trolley to the next welding station.

[0069] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A flexible positioning system for roofs of multiple models, characterized in that: It comprises a flexible positioning fixture (1), a top cover positioning gripper (2), a positioning trolley (3), and a conveying roller bed (4); The flexible positioning fixtures (1) are provided with two, and the two flexible positioning fixtures (1) are respectively arranged on both sides of the positioning trolley (3), and the flexible fixture comprises a lower body fixture frame (14), and the lower body fixture frame (14) is connected with a first guide rail, a first switching slide (21), a fourth locking cylinder (20), an eighth limit block (18), a ninth limit block (39), a first switching cylinder (19), and a second limit cylinder (17); the first switching slide (21) is slidably connected to the first guide rail, and the first switching cylinder (19) is used to drive the first switching slide (21) to move along the first guide rail; The first switching slide (21) is connected to a first locking cylinder (6), a second locking cylinder (7), a third locking cylinder (8), a first limiting cylinder (9), a second guide rail, a second switching slide (23), a second switching cylinder (22), a fourth limiting block (12), a fifth limiting block (13), a first positioning pin (16) and a third clamping unit (46); the second switching slide (23) is slidably connected to the second guide rail; and the second switching cylinder (22) drives the second switching slide (23) to move along the second guide rail; The second switching slide (23) is connected to a first limit block (5), a second limit block (10), a third limit block (11), a first clamping unit (24), and a twelfth limit block (45).

2. The flexible positioning system for roofs of various types according to claim 1, characterized in that: The top cover positioning gripper (2) is connected to the flexible positioning fixture (1), and the top cover positioning gripper (2) comprises a gripper body frame (40), and the gripper body frame (40) is connected to a top cover gripper rear positioning block (25), a top cover front positioning block (26), a suction cup (27), a second clamping unit (28), a second positioning pin (29) and a detection switch (41).

3. The flexible positioning system for multiple vehicle types of top covers according to claim 2 is characterized in that: The positioning trolley (3) comprises a third positioning pin (30), a trolley body (31), a coding ruler (32) and a tenth limiting block (33); the third positioning pin (30), the coding ruler (32) and the tenth limiting block (33) are all mounted on the trolley body (31).

4. The flexible positioning system for multiple vehicle types of top covers according to claim 3 is characterized in that: The conveying roller bed (4) is arranged on the lower side of the positioning trolley (3), and the conveying roller bed (4) comprises a roller bed body (38), and the roller bed body (38) is connected to an eleventh limiting block (34), a fourth positioning pin (35), a first limiting wheel (36), and an encoder (37).

5. The flexible positioning system for roofs of various types according to claim 1, characterized in that: The eighth limit block (18) and the ninth limit block (39) are respectively connected to two ends of the lower vehicle body clamp frame (14).

6. The flexible positioning system for multiple vehicle types of top covers according to claim 5 is characterized in that: The second limiting cylinder (17) is arranged on a side of the lower vehicle body clamp frame (14) connected to the ninth limiting block (39).

7. The flexible positioning system for roofs of various types according to claim 1, characterized in that: The second locking cylinder (7) is arranged between the first locking cylinder (6) and the third locking cylinder (8), and the third locking cylinder (8) is arranged between the second locking cylinder (7) and the first limit cylinder (9).

8. The flexible positioning system for multiple vehicle types of top covers according to claim 7 is characterized in that: The first switching cylinder (19) and the second switching cylinder (22) are arranged vertically, where the verticality here means skewed verticality. Through the cooperation of the first switching cylinder (19) and the second switching cylinder (22), the second switching slide (23) can be driven to move along the X / Y direction.

9. The flexible positioning system for roofs of various types according to claim 1, characterized in that: The first positioning pin (16) is arranged on the top of the first switching slide (21).

10. The flexible positioning system for multiple vehicle types of top covers according to claim 1, characterized in that: Also included is a robot connected to the robot base.

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