Adjusting device for assembly gap between machine cover and fender

Abstract

The invention discloses a cover and fender assembly clearance adjusting device which comprises a positioning block, an adjusting block is arranged on the side of the positioning block, a limiting block is arranged at the end of the adjusting block, and a locking mechanism is arranged below the positioning block. The production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile assembly, and in particular relates to a device for adjusting the assembly gap between a hood and a fender. Background Art

[0002] The gap surface difference between the vehicle hood and fender is a highly sensitive area for the perception of the vehicle's appearance. A gap surface difference with better appearance can reflect the lean manufacturing of the vehicle, improve the appearance quality, and thus increase market recognition.

[0003] The mainstream existing technology adopts two solutions: plug adjustment and tooling assembly. If plug adjustment is adopted, the operation is complicated, and the gap state needs to be confirmed when the hood is closed, and then the hood is opened to adjust the fender position by the worker's feel. This adjustment method generally requires 1-3 adjustments to complete, resulting in a loss of production cycle. If ordinary tooling is used for assembly, the structure is bulky, and the dimensional chain is long due to the relative reference tolerance of the fender and the hood, resulting in a low first-time pass rate when assembling the gap between the hood and the fender, and rework and adjustment increase the production line cycle.

[0004] The utility model patent with publication number CN203712638U was published on July 16, 2014, and is named as a fender and hood gap and step difference quick adjustment auxiliary device, which includes a buffer block, an adjustment nut and a connecting rod, the connecting rod is provided with an external thread, the bottom end of the connecting rod is threadedly connected to the front cross beam of the vehicle body, the adjustment nut is threadedly connected to the connecting rod, and the buffer block is arranged on the end surface of one end of the connecting rod. The fender and hood gap and step difference quick adjustment auxiliary device also cannot solve the technical problems described above. Summary of the invention

[0005] The purpose of the present invention is to provide a hood and fender assembly gap adjustment device that is simple to operate, ensures that the hood and fender are installed in place, and improves production efficiency in view of the shortcomings of the prior art.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The hood and fender assembly gap adjustment device comprises a positioning block, an adjustment block is arranged on the side of the positioning block, a limit block is arranged at the end of the adjustment block, and a locking mechanism is arranged below the positioning block.

[0008] One end of the adjustment block is fixedly connected to a sliding shaft, and the sliding shaft passes through the positioning block. The locking mechanism includes a pull rod, and one end of the pull rod is provided with a top, and the bottom end of the positioning block is provided with a connecting hole. The side of the top is threadedly connected to the connecting hole, and the top end of the top is located below the sliding shaft.

[0009] The limit block is arranged at one end of the adjustment block away from the positioning block, the end of the adjustment block close to the positioning block is an L-shaped structure, the limit block is a T-shaped structure, the upper end surface of the adjustment block is provided with a positioning groove, and the top of the limit block is located on one side of the positioning groove.

[0010] A return spring is sleeved on the sliding shaft, and two ends of the return spring are respectively fixedly connected to a positioning block and an adjusting block.

[0011] The positioning block includes a first positioning block and a second positioning block, wherein the first positioning block is provided with a first positioning surface and a second positioning surface at the top and bottom of one end thereof respectively; a fixing block is fixedly connected to one side of the second positioning block, and a third positioning surface is provided at the bottom of the fixing block; the first positioning surface and the second positioning surface are magnetic structures.

[0012] A first positioning pin is provided at the bottom of the first positioning block, and a second positioning pin is provided at the bottom of the second positioning block. The first positioning pin is higher than the second positioning pin.

[0013] An auxiliary limiting block is provided on one side of the first positioning block, and the auxiliary limiting block is a U-shaped structure.

[0014] A guide surface is provided on one side of the positioning groove, and the guide surface is an inclined structure.

[0015] The sliding shafts are arranged in pairs.

[0016] The technical effect of the present invention is as follows: by adopting the hood and fender assembly gap adjustment device of the present invention, the position of the adjustment block relative to the hood is adjusted by locking the adjustment block with a pull rod, a Y-direction reference is provided for the fender assembly process, and the accurate positioning and position stability of the device on the vehicle body are guaranteed through the cooperation of multiple positioning structures, thereby ensuring the consistency of the gap surface difference between the hood and the fender, which is beneficial to improving the appearance quality; compared with the traditional technology using gap plugs or complex tooling, the operation process is simpler and lighter, and the size of the chain link is effectively shortened. It only needs to control the hood and fender's own contours to be qualified, and the fender can be installed in place at one time, thereby reducing the rework rate, improving the qualified rate, and meeting the production rhythm of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] This specification includes the following drawings, which show the following contents:

[0018] Figure 1 It is a structural schematic diagram of the bonnet and fender assembly gap adjustment device of the present invention;

[0019] Figure 2 It is a front view of the bonnet and fender assembly gap adjustment device of the present invention;

[0020] Figure 3is a top view of the bonnet and fender assembly gap adjustment device of the present invention;

[0021] Figure 4-1 to Figure 4-3 It is a flow chart of the use of the hood and fender assembly gap adjustment device;

[0022] Figure 5 It is a schematic diagram of the coordination between the hood, fender and adjustment block;

[0023] Figure 6-1 and Figure 6-2 It is a working diagram of the pull rod.

[0024] The markings in the figure are: 1. hood; 2. fender; 3. positioning block; 4. adjustment block; 5. limit block; 6. positioning groove; 7. sliding shaft; 8. mounting hole; 9. return spring; 10. pull rod; 11. top; 12. connecting hole; 13. first positioning block; 14. second positioning block; 15. first positioning pin; 16. second positioning pin; 17. auxiliary limit block; 18. fixing block; 19. guide surface; 20. auxiliary hole; 21. first positioning surface; 22. second positioning surface; 23. third positioning surface. DETAILED DESCRIPTION

[0025] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0026] like Figure 1 As shown, the hood and fender assembly gap adjustment device comprises a positioning block 3, an adjustment block 4 is provided on the side of the positioning block 3, a limit block 5 is provided at the end of the adjustment block 4, and a locking mechanism is provided below the positioning block 3. The positioning block 3 is used to position the entire device on the vehicle body, and can provide a positioning basis for subsequent operations. The limit block 5 can simultaneously position the hood 1 and the fender 2. The adjustment block 4 is fixed by the locking mechanism, so that its position is fixed relative to the hood 1, thereby providing a positioning reference surface for the installation of the fender 2.

[0027] like Figure 1 to Figure 6-2As shown, one end of the adjustment block 4 is fixedly connected to the sliding shaft 7, and the sliding shaft 7 passes through the positioning block 3. The locking mechanism includes a pull rod 10, and one end of the pull rod 10 is provided with a top 11. The bottom end of the positioning block 3 is provided with a connecting hole 12. The side of the top 11 is threadedly connected to the connecting hole 12, and the top of the top 11 is located below the sliding shaft 7. In the above structure, the top 11 and the connecting hole 12 are threadedly connected, and the top 11 is locked to the sliding shaft 7 by rotating the pull rod 10. The sliding shaft 7 has two working states of locking or moving. The control process is realized by rotating the pull rod 10, and the operation process is simple and convenient. Among them, the pull rod 10 is located below the positioning block 3, and will not be blocked by the body beam structure or the hood 1 in space, which is convenient for operation and control. In addition, an auxiliary hole 20 is provided at the end of the pull rod 10, and the operator can also control it with the help of auxiliary tools. Compared with the adjustment process using plugs or complex tooling in the prior art, the operation steps are few, the rework rate is low, the qualified rate is high, and it adapts to the production rhythm of the production line. When the adjustment block 4 is in the working state, the adjustment block 4 is manually pushed to make the positioning groove 6 fit with the hood 1, and the pull rod 10 is rotated to make the ejector pin press against the sliding shaft 7. The sliding shaft 7 is in a locked state. At this time, the adjustment block 4 is fixed to the correct position. At this time, the gap between the hood 1 and the fender 2 is adjusted to a suitable position, and then the hood 1 and the fender 2 can be accurately assembled; when the adjustment block 4 is in the non-working state, that is, the ejector pin is in the withdrawn state, the ejector pin does not apply force to the sliding shaft 7, and the return spring 9 drives the adjustment block 4 to the open state.

[0028] like Figures 1 to 3 As shown, the limit block 5 is arranged at the end of the adjustment block 4 away from the positioning block 3, and the end of the adjustment block 4 close to the positioning block 3 is an L-shaped structure. The upper end surface of the adjustment block 4 is provided with a positioning groove 6, and the top of the limit block 5 is located on one side of the positioning groove 6. The L-shaped end of the adjustment block 4 is used to ensure the horizontal installation accuracy of the adjustment block 4 and provide a horizontal basis for the positioning effect of the limit block 5. Two mounting holes 8 are also designed for installing the sliding shaft 7. The positioning groove 6 and the top of the limit block 5 are used to position the hood 1, and the bottom of the limit block 5 is used to position the fender 2. When the device is positioned behind the vehicle body and the hood 1 is closed, the adjustment block 4 is located between the positioning surface of the hood 1 and the positioning surface of the fender 2, that is, the gap surface difference between the hood 1 and the fender 2 is adjusted in place. After the adjustment block 4 is positioned by the pull rod 10, the adjustment block 4 is in a suitable position at this time, and the limit block 5 forms a Y-direction reference datum surface for the installation of the fender 2, thereby ensuring that the fender 2 is installed in place.

[0029] like Figure 1 to Figure 6-2As shown, a return spring 9 is sleeved on the sliding shaft 7, and the two ends of the return spring 9 are respectively fixedly connected to the positioning block 3 and the adjustment block 4. The above structure limits the fixed length distance between the adjustment block 4 and the positioning block 3 when the adjustment block 4 is not in operation, and avoids the separation or disengagement of the adjustment block 4 from the positioning block 3. When the adjustment block 4 is in operation, the return spring 9 will be compressed by a certain distance to meet the axial movement process of the adjustment block 4 fitting the cover 1. When the adjustment block 4 is not in operation, the return spring 9 resets the adjustment block 4 to the initial state through its own reset action. In the above process, the sliding shaft 7 correspondingly plays a horizontal supporting role for the adjustment block 4.

[0030] like Figures 1 to 3 As shown, the positioning block 3 includes a first positioning block 13 and a second positioning block 14. The first positioning block 13 is provided with a first positioning surface 21 and a second positioning surface 22 at the top and bottom of one end respectively; a fixed block 18 is fixedly connected to one side of the second positioning block 14, and a third positioning surface 23 is provided at the bottom of the fixed block 18; the first positioning surface 21 and the second positioning surface 22 are magnetic structures. The first positioning surface 21 contacts the upper end surface of the longitudinal beam on the vehicle body, the second positioning surface 22 contacts the bottom of the hood 1, and the third positioning surface 23, the first positioning surface 21 and the second positioning surface 22 use a magnetic suction function to ensure that the positioning block 3 is stable and not easy to loosen, forming a Z-direction positioning of the device, and combined with the use of positioning pins, the positioning stability of the device on the vehicle body is ensured.

[0031] like Figures 1 to 3 As shown, a first positioning pin 15 is provided at the bottom of the first positioning block 13, and a second positioning pin 16 is provided at the bottom of the second positioning block 14, and the first positioning pin 15 is higher than the second positioning pin 16. The first positioning pin 15 and the second positioning pin 16 are used to adapt to the positioning holes of the vehicle body, limit the movement of the device in the X and Y directions, and play a preliminary positioning effect on the device. The bottom ends of both are conical structures, which play a guiding role during positioning, and the heights of the two are different to meet the height difference of the upper end surface of the upper longitudinal beam.

[0032] like Figures 1 to 3 As shown, an auxiliary limit block 17 is provided on one side of the first positioning block 13, and the auxiliary limit block 17 is a U-shaped structure. The auxiliary limit block 17 is designed to be U-shaped, and its inner side is overlapped on the vehicle body beam structure, which can limit the Y direction of the device as an auxiliary positioning to prevent the overall device from flipping.

[0033] like Figure 5 As shown, a guide surface 19 is provided on one side of the positioning groove 6, and the guide surface 19 is an inclined structure. The positioning groove 6 structure is adapted to the shape of the edge of the cover 1, and there is no spatial interference between the turning process of the cover 1 and the movement process of the adjustment block 4, and the cover 1 will not be damaged.

[0034] like Figure 1As shown, the sliding shafts 7 are arranged in pairs. The sliding shafts 7 pass through the positioning block 3 to guide the movement of the adjustment block 4. They are arranged in pairs, and each adjustment block 4 is connected with two sliding shafts 7, so as to improve the accuracy of the movement direction of the adjustment block 4.

[0035] To ensure that the device is firmly positioned on the vehicle body, six degrees of freedom are used for constraints. Two locating pins are adapted to the locating holes of the upper longitudinal beam of the vehicle to control the X / Y direction of the device. Three locating surfaces are used to control the Z direction of the device. The first locating surface 21 and the second locating surface 22 are magnetically adsorbed on the upper longitudinal beam of the vehicle. The auxiliary limit block 17 is used as an auxiliary positioning to prevent the tooling from flipping over. The two adjustment blocks 4 are locked by the pull rod 10. When the adjustment block 4 is fitted and locked with the hood 1, it serves as a reference for adjusting the fender 2 in the Y direction.

[0036] like Figure 4-1 to Figure 4-3 As shown, the operation method is as follows: After the welding adjustment line assembles the front door and the hood 1, the fender 2 is assembled; 1. Open the hood 1 and position the device on the car body. Positioning method: insert the positioning pin into the positioning hole of the upper longitudinal beam of the car. The first positioning surface 21 and the second positioning surface 22 ensure support and pressing through magnetic attraction. The third positioning surface 23 is designed with a reverse pressure head to press on the car body. At this time, the tooling has been positioned on the car body. 2. Close the hood 1 to the designed position, tighten the pull rod 10 to tighten the adjustment block 4 and the gap matching position of the hood 1 and lock it. At this time, the position of the adjustment block 4 is already in the correct position according to the state of the hood 1. 3. Open the hood 1, pre-install the fender 2 on the car body, press the device on the car body, manually press the fender 2 and the adjustment block 4, tighten the installation nut, at this time, the fender 2 has been installed and is in the correct position, and then the device can be removed and the hood 1 can be closed.

[0037] The hood and fender assembly gap adjustment device uses a pull rod 10 to lock the adjustment block 4 to achieve position adjustment of the adjustment block 4 relative to the hood 1, provides a Y-direction reference for the assembly process of the fender 2, and also ensures accurate positioning and stable position of the device on the vehicle body through the cooperation of multiple positioning structures, thereby ensuring that the gap surface difference between the hood 1 and the fender 2 is consistent, which is beneficial to improving the appearance quality; compared with the traditional technology that uses gap plugs or complex tooling, the operation process is simpler and lighter, and the size chain link is effectively shortened. It only needs to control the contours of the hood 1 and the fender 2 to be qualified, so that the fender 2 can be installed in place at one time, reducing the rework rate, improving the qualified rate, and meeting the production rhythm of the production line.

[0038] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A device for adjusting the gap between a hood and a fender, characterized in that: It comprises a positioning block (3), an adjusting block (4) is provided on the side of the positioning block (3), a limiting block (5) is provided on the end of the adjusting block (4), and a locking mechanism is provided below the positioning block (3).

2. The bonnet and fender assembly gap adjustment device according to claim 1, characterized in that: One end of the adjustment block (4) is fixedly connected to a sliding shaft (7), and the sliding shaft (7) passes through the positioning block (3). The locking mechanism includes a pull rod (10), and one end of the pull rod (10) is provided with a tip (11). The bottom end of the positioning block (3) is provided with a connecting hole (12). The side of the tip (11) is threadedly connected to the connecting hole (12), and the top of the tip (11) is located below the sliding shaft (7).

3. The bonnet and fender assembly gap adjustment device according to claim 2, characterized in that: The limit block (5) is arranged at one end of the adjustment block (4) away from the positioning block (3); the end of the adjustment block (4) close to the positioning block (3) is an L-shaped structure; the upper end surface of the adjustment block (4) is provided with a positioning groove (6); and the top end of the limit block (5) is located on one side of the positioning groove (6).

4. The bonnet and fender assembly gap adjustment device according to claim 3, characterized in that: A return spring (9) is sleeved on the sliding shaft (7), and two ends of the return spring (9) are respectively fixedly connected to a positioning block (3) and an adjustment block (4).

5. The bonnet and fender assembly gap adjustment device according to any one of claims 1 to 4, characterized in that: The positioning block (3) comprises a first positioning block (13) and a second positioning block (14); the first positioning block (13) is provided with a first positioning surface (21) and a second positioning surface (22) at the top and bottom of one end thereof respectively; the second positioning block (14) is fixedly connected to a fixing block (18) at one side thereof, and the fixing block (18) is provided with a third positioning surface (23) at the bottom thereof; the first positioning surface (21) and the second positioning surface (22) are magnetic structures.

6. The bonnet and fender assembly gap adjustment device according to claim 5, characterized in that: A first positioning pin (15) is provided at the bottom of the first positioning block (13), and a second positioning pin (16) is provided at the bottom of the second positioning block (14), wherein the first positioning pin (15) is higher than the second positioning pin (16).

7. The bonnet and fender assembly gap adjustment device according to claim 6, characterized in that: An auxiliary limiting block (17) is provided on one side of the first positioning block (13), and the auxiliary limiting block (17) is a U-shaped structure.

8. The bonnet and fender assembly gap adjustment device according to claim 3, characterized in that: A guide surface (19) is provided on one side of the positioning groove (6), and the guide surface (19) is an inclined structure.

9. The bonnet and fender assembly gap adjustment device according to claim 4, characterized in that: The sliding shafts (7) are arranged in pairs.

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