A positioning device for a vertical frame

Abstract

The utility model relates to a positioning device of vertical frame belongs to the field of automobile manufacturing technology, it includes the fixed frame and two stand column units for positioning vertical frame, the vertical frame includes bottom crossbeam, top crossbeam and two frame stands between bottom crossbeam and top crossbeam, bottom crossbeam is set up on the fixed frame through the sliding mechanism, under the action of sliding mechanism, vertical frame can move between initial position and jointing position, the stand column unit is located in the side of frame stand for positioning frame stand. The sliding mechanism includes rack, gear and sliding motor of driving gear rotation that are engaged with rack, the utility model simple structure, convenient operation, the positioning of vertical frame is stable, safe and reliable, guarantees the positioning accuracy of vertical frame, and different pincers can be installed on vertical frame and positioned, to satisfy the flexible jointing production requirement of automobile.

Description

Technical Field

[0001] This utility model relates to a positioning device for a vertical frame, belonging to the field of automobile manufacturing technology. Background Technology

[0002] As a means of transportation, automobiles are increasingly in demand, and the pace of automobile upgrades is accelerating. Car manufacturers need to continuously develop or expand into new car categories. With automobile manufacturing production lines moving towards automation, intelligence, and flexibility, the development of flexible automobile production lines has made it possible for multiple models to be produced on the same line.

[0003] In modern automobile production, flexible assembly systems are becoming increasingly common and their performance is becoming more and more sophisticated. They are especially widely used in body-in-white welding lines. The assembly system mainly relies on the tooling on the left and right sides to position the body during assembly. After the body is positioned, robots perform welding. Flexible assembly can achieve the production of multiple models at the same workstation by changing the tooling on the left and right sides.

[0004] Nevertheless, some existing assembly systems use bottom supports to position the side panel tooling. Relying solely on bottom supports makes it difficult to control the positioning accuracy of the upper part of the tooling on the car body during assembly. Using tetrahedral structures with pit positioning tooling presents problems such as complex construction and difficult equipment installation and debugging. There are also systems that use grippers positioned on fixed frames on both sides to complete the assembly of workpieces. The tooling fixtures are set on the grippers. In this type of fixed frame, the fixed frame cannot be moved. When the workpiece is transferred, the grippers must be removed first before the workpiece can be transported, which affects the assembly rhythm of the car body. Therefore, a vertical frame positioning device is needed. When the workpiece enters or exits, the vertical frame can move to the initial position to avoid interfering with the entry and exit of the workpiece. During assembly, the vertical frame can move to the assembly position to meet the assembly requirements of the car body and ensure the support strength of the vertical frame. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a positioning device for a vertical frame.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A positioning device for a vertical frame includes a fixed frame for positioning the bottom of the vertical frame and two column units for positioning the side of the vertical frame. The vertical frame includes a bottom crossbeam, a top crossbeam, and two frame columns disposed between the bottom crossbeam and the top crossbeam. The bottom crossbeam is disposed on the fixed frame through a sliding mechanism. Under the action of the sliding mechanism, the vertical frame can move between an initial position and a combined position. The column units are located on the side of the frame columns for positioning the frame columns.

[0007] The beneficial effects of this utility model are as follows: The bottom crossbeam of the vertical frame can be slidably mounted on the fixed frame through a sliding mechanism, allowing the vertical frame to move between the initial position and the assembly position, meeting the requirements for workpiece entry, exit, and assembly. The top crossbeam of the vertical frame can be used to install and position grippers for grasping workpieces. The frame columns of the vertical frame not only stably support the top crossbeam, but also have column units on their sides. These column units can limit and support the frame columns, preventing swaying of the upper part of the vertical frame from affecting positioning accuracy. In summary, this utility model has a simple structure, is easy to operate, provides stable and reliable positioning of the vertical frame, ensures its positioning accuracy, and allows different grippers to be installed on the vertical frame for precise positioning, thereby meeting the requirements of flexible automotive assembly production.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the sliding mechanism includes a rack, a gear meshing with the rack, and a sliding motor that drives the gear to rotate. The rack is located at the bottom of the bottom crossbeam, and the gear rotates under the action of the sliding motor.

[0010] The beneficial effect of adopting the above-mentioned further solution is that the gear rotates under the action of the sliding motor to drive the movement of the rack, so that the bottom crossbeam can slide on the fixed frame, which can meet the movement requirements of the vertical frame between the initial position and the assembly position. For example, when the workpiece enters or exits, the vertical frame can move to the initial position under the action of the sliding motor. The vertical frame and the gripper on the vertical frame will not interfere with the entry and exit of the workpiece. After the workpiece is gripped in place, the sliding motor is activated, and the vertical frame can slide on the fixed frame to the assembly position to realize the assembly of the workpiece and prepare for the assembly and welding of the car body.

[0011] Furthermore, the bottom of the bottom crossbeam is provided with a pair of racks, the sliding motor has two output shafts, each of which is connected to one end of a coupling, the other end of the coupling is provided with a gear, and the fixed frame is also provided with a bearing unit for supporting the coupling.

[0012] The advantages of adopting the above-mentioned further solution are that using a single power drive ensures the consistency of gear and rack transmission, reduces the asynchronous problems that may be caused by multiple power sources, reduces manufacturing costs, and facilitates maintenance.

[0013] Furthermore, the fixed frame is provided with multiple roller support assemblies, each roller support assembly including a wheel frame and a support wheel rotatably mounted on the wheel frame, and the bottom crossbeam is able to travel on the support wheel.

[0014] The beneficial effects of adopting the above-mentioned further solution are that the roller support assembly can reduce the friction between the bottom crossbeam and the fixed frame, making the movement of the bottom crossbeam more stable and smooth; the support of the roller support assembly enhances the stability and load-bearing capacity of the entire positioning device, ensuring the stability and safety of the vertical frame during movement.

[0015] Furthermore, the bottom of the bottom crossbeam is also provided with a guide rail that allows it to travel on the support wheel.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the cooperation between the guide rail and the support wheel makes the movement trajectory of the bottom crossbeam more fixed, reducing the possibility of deviation and swaying, thereby improving the positioning accuracy of the vertical frame and further ensuring the stability and accuracy of the bottom crossbeam when it moves on the support wheel. At the same time, the guide rail also enhances the structural strength of the bottom crossbeam and facilitates its maintenance.

[0017] Furthermore, the side of the guide rail is provided with a side guide block, and the fixed frame is provided with a side guide wheel that can act on the side guide block.

[0018] The beneficial effects of adopting the above-mentioned further solution are that the cooperation between the side guide block and the side guide wheel limits the position of the bottom crossbeam in the X direction, restricts the offset of the bottom crossbeam in the horizontal X direction, ensures the straightness of the guide rail during movement, enhances the stability of the vertical frame during positioning, reduces friction and wear caused by offset, and extends the service life of the device.

[0019] Furthermore, the fixed frame is provided with a guide groove, which is a C-shaped structure or a channel steel structure, and the bottom crossbeam is provided with a groove guide wheel that can move within the guide groove.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the matching of the groove guide wheel and the guide groove limits the position of the bottom crossbeam in the Z direction, the smooth movement of the groove guide wheel in the guide groove reduces the resistance and noise during the movement process, and improves the operational reliability and stability of the entire positioning device.

[0021] Furthermore, the column unit includes a limiting column and a column limiting mechanism disposed on the limiting column. The column limiting mechanism includes a column bracket, a limiting roller, and a lifting cylinder for driving the limiting roller. A connecting bracket is provided on the frame column. An installation space for accommodating the limiting part of the connecting bracket is provided between the limiting part of the column bracket and the limiting roller. A wedge block is provided on one side of the limiting part of the connecting bracket. The wedge block is thinner on the inside and thicker on the outside. Under the action of the lifting cylinder, the limiting roller can move outward and act on the wedge block. The limiting part of the column bracket contacts the other side of the limiting part of the connecting bracket to lock and limit the limiting part of the connecting bracket.

[0022] The beneficial effect of adopting the above-mentioned further solution is that the cooperation between the limiting roller and the wedge block achieves precise locking of the limiting part of the connecting bracket. The wedge block is thinner on the inside and thicker on the outside. When the lifting cylinder is activated, the limiting roller can move outward and act on the wedge block. The other side of the limiting part of the connecting bracket contacts the limiting part of the main bracket, thereby allowing the connecting bracket to be stably limited between the column bracket and the roller, effectively preventing the connecting bracket from shaking during movement and enhancing the positioning accuracy and stability of the vertical frame.

[0023] Furthermore, the column support is provided with a column limiting block on the limiting part, and the other side of the limiting part of the connecting support is provided with a frame limiting block that can contact the column limiting block.

[0024] The beneficial effect of adopting the above-mentioned further solution is that the limiting part of the column bracket contacts the limiting part of the connecting bracket, and limiting blocks can be set on the contact surfaces of the two respectively. The column limiting block and the bracket limiting block make contact and fit together, which facilitates subsequent replacement and maintenance even if there is wear, and the maintenance cost is low.

[0025] Furthermore, there are two column limiting mechanisms, which are symmetrically arranged on the limiting column.

[0026] The beneficial effect of adopting the above-mentioned further solution is that a column limiting mechanism can be set on the upper and lower parts of the limiting column respectively, so that the upper and lower parts of the frame column can be stably limited, avoiding the situation that the vertical frame is prone to tipping over if it is only supported by the bottom, further ensuring the stable positioning of the vertical frame and high safety. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the angle between the fixed frame and the bottom crossbeam of this utility model;

[0029] Figure 3 This is a schematic diagram of the angle structure between the fixed frame and the bottom crossbeam of this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the column unit of this utility model;

[0031] Figure 5 This is a structural schematic diagram of the column unit and connecting bracket in the cooperation state at angle one of this utility model;

[0032] Figure 6 This is a structural schematic diagram of the column unit and connecting bracket in the second cooperative state of this utility model;

[0033] Figure 7 This is a structural diagram of the present invention in use;

[0034] Figure 8 for Figure 7 Enlarged view of a portion of point A in the middle.

[0035] In the diagram, 100 is the vertical frame; 101 is the bottom crossbeam; 102 is the top crossbeam; 103 is the frame column; 104 is the connecting bracket; 105 is the frame limiting block; 106 is the wedge block; 107 is the guide rail; 108 is the side guide block; 109 is the groove guide wheel; 200 is the fixed frame; 201 is the support wheel; 202 is the wheel frame; 203 is the side guide wheel; 204 is the guide groove; 300 is the column unit; 301 is the limiting column; 302 is the column bracket; 303 is the limiting roller; 304 is the lifting cylinder; 305 is the column limiting block; 306 is the connecting block; 307 is the guide slide rail; 308 is the guide slider; 401 is the sliding motor; 402 is the gear; 403 is the rack; 404 is the coupling; 405 is the bearing unit; and 500 is the gripper. Detailed Implementation

[0036] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0037] like Figures 1-8 As shown, a positioning device for a vertical frame includes a fixed frame 200 for positioning the bottom of the vertical frame 100 and two column units 300 for positioning the sides of the vertical frame 100. The vertical frame 100 includes a bottom crossbeam 101, a top crossbeam 102, and two frame columns 103 disposed between the bottom crossbeam 101 and the top crossbeam 102. The bottom crossbeam 101 is mounted on the fixed frame 200 via a sliding mechanism. Under the action of the sliding mechanism, the vertical frame 100 can move between an initial position and a combined position. The column units 300 are located on the sides of the frame columns 103 for positioning the frame columns 103.

[0038] The sliding mechanism includes a rack 403, a gear 402 meshing with the rack 403, and a sliding motor 401 driving the gear 402 to rotate. The rack 403 is located at the bottom of the bottom crossbeam 101, and the gear 402 rotates under the action of the sliding motor 401. The rotation of the gear 402 under the action of the sliding motor 401 drives the movement of the rack 403, allowing the bottom crossbeam 101 to slide on the fixed frame 200. This satisfies the movement requirements of the vertical frame 100 between the initial position and the assembly position. For example, when a workpiece enters or exits, the vertical frame 100 can move to the initial position under the action of the sliding motor 401. The vertical frame 100 and the gripper 500 on the vertical frame 100 will not interfere with the entry or exit of the workpiece. After the workpiece is gripped in place, the sliding motor 401 is activated, and the vertical frame 100 can slide on the fixed frame 200 to the assembly position, realizing the assembly of the workpiece and preparing for the vehicle body assembly and welding.

[0039] The bottom of the bottom crossbeam 101 is provided with a pair of racks 403. The sliding motor 401 has two output shafts, each of which is connected to one end of a coupling 404. The other end of the coupling 404 is provided with a gear 402. The fixed frame 200 is also provided with a bearing unit 405 for supporting the coupling 404. Using a single power drive ensures the consistency of the gear 402 and rack 403 transmission, reduces potential synchronization problems caused by multiple power sources, lowers manufacturing costs, and facilitates maintenance. The bearing unit 405 uses a bearing housing.

[0040] The fixed frame 200 is equipped with multiple roller support assemblies, each including a wheel frame 202 and support wheels 201 rotatably mounted on the wheel frame 202. The bottom crossbeam 101 can travel on the support wheels 201. The roller support assemblies reduce friction between the bottom crossbeam 101 and the fixed frame 200, making the movement of the bottom crossbeam 101 smoother and more stable. The support provided by the roller support assemblies enhances the stability and load-bearing capacity of the entire positioning device, ensuring the stability and safety of the vertical frame 100 during movement.

[0041] The bottom of the bottom crossbeam 101 is also provided with a guide rail 107 that can travel on the support wheel 201. The cooperation between the guide rail 107 and the support wheel 201 makes the movement trajectory of the bottom crossbeam 101 more fixed, reducing the possibility of deviation and swaying, thereby improving the positioning accuracy of the vertical frame 100 and further ensuring the stability and accuracy of the bottom crossbeam 101 when traveling on the support wheel 201. At the same time, the guide rail 107 also enhances the structural strength of the bottom crossbeam 101 and facilitates its maintenance.

[0042] The guide rail 107 has a side guide block 108 on its side, and the fixed frame 200 has a side guide wheel 203 that can act on the side guide block 108. The cooperation between the side guide block 108 and the side guide wheel 203 limits the position of the bottom crossbeam 101 in the X direction, restricts the offset of the bottom crossbeam 101 in the horizontal X direction, ensures the straightness of the guide rail 107 during movement, enhances the stability of the vertical frame 100 during positioning, reduces friction and wear caused by offset, and extends the service life of the device.

[0043] The fixed frame 200 is provided with a guide groove 204, which has a C-shaped structure or a channel steel structure. The bottom crossbeam 101 is provided with a grooved guide wheel 109 that can travel within the guide groove 204. The matching between the grooved guide wheel 109 and the guide groove 204 defines the position of the bottom crossbeam 101 in the Z direction. The smooth movement of the grooved guide wheel 109 within the guide groove 204 reduces resistance and noise during movement, and improves the operational reliability and stability of the entire positioning device.

[0044] The column unit 300 includes a limiting column 301 and a column limiting mechanism disposed on the limiting column 301. The column limiting mechanism includes a column bracket 302, a limiting roller 303, and a lifting cylinder 304 for driving the limiting roller 303. A connecting bracket 104 is provided on the frame column 103. An installation space for accommodating the limiting part of the connecting bracket 104 is provided between the limiting part of the column bracket 302 and the limiting roller 303. A wedge block 106 is provided on one side of the limiting part of the connecting bracket 104. The wedge block 106 is thinner on the inside and thicker on the outside. Under the action of the lifting cylinder 304, the limiting roller 303 can move outward and act on the wedge block 106. The limiting part of the column bracket 302 contacts the other side of the limiting part of the connecting bracket 104 to lock and limit the limiting part of the connecting bracket 104. The cooperation between the limiting roller 303 and the wedge block 106 achieves precise locking of the limiting part of the connecting bracket 104. The wedge block 106 is thinner on the inside and thicker on the outside. When the lifting cylinder 304 is activated, the limiting roller 303 can move outward to closely fit the wedge block 106. The other side of the limiting part of the connecting bracket 104 contacts the limiting part of the main bracket, thereby enabling the connecting bracket 104 to be stably limited between the column bracket 302 and the roller, effectively preventing the connecting bracket 104 from shaking during movement and enhancing the positioning accuracy and stability of the vertical frame 100.

[0045] The limiting roller 303 is rotatably mounted on the connecting block 306, and the piston rod of the lifting cylinder 304 is connected to the connecting block 306. The limiting column 301 is provided with a guide rail 307, and the connecting block 306 is provided with a guide slider 308 adapted to the guide rail 307.

[0046] The column support 302 has a column limiting block 305 on its limiting portion, and the connecting support 104 has a frame limiting block 105 on the other side of its limiting portion that can contact the column limiting block 305. The limiting portion of the column support 302 contacts the limiting portion of the connecting support 104, and limiting blocks can be respectively provided on their contact surfaces. The column limiting block 305 and the frame limiting block 105 make contact and fit together, which facilitates subsequent replacement and maintenance even if there is wear, resulting in low maintenance costs.

[0047] Two column limiting mechanisms are provided, symmetrically arranged on the limiting columns 301. One column limiting mechanism can be installed at the upper and lower parts of the limiting column 301, ensuring stable positioning of both the upper and lower parts of the frame column 103. This prevents the vertical frame 100 from easily tipping over if supported only by its bottom, further ensuring the stable positioning of the vertical frame 100 and providing high safety. The column unit 300 is mounted on the fixed frame 200.

[0048] The bottom crossbeam 101 of the vertical frame 100 of this utility model is slidably mounted on the fixed frame 200 via a sliding mechanism. The vertical frame 100 can move between an initial position and a combined position to meet the requirements of workpiece entry / exit and assembly. The top crossbeam 102 of the vertical frame 100 can be used to install and position a gripper 500 for grasping the workpiece. The frame columns 103 of the vertical frame 100 not only stably support the top crossbeam 102, but also have column units 300 on their sides. The column units 300 can limit and support the frame columns 103, preventing the upper part of the vertical frame 100 from swaying and meeting the requirements. The positioning accuracy requirement of the vertical frame 100 is to achieve stable support and positioning of the vertical frame 100; the flexible assembly system can set up two opposing vertical frames 100. The vertical frame 100 is stably positioned by the vertical frame 100 positioning device. According to the assembly requirements, the grippers 500 required for assembly are installed on the two vertical frames 100. During assembly, the sliding mechanism is activated, and the two vertical frames 100 and the grippers 500 on the vertical frames 100 move from the initial position to the assembly position. The column limiting mechanism is activated, and the frame columns 103 of the vertical frame 100 are limited. The grippers 500 accurately position the body-in-white for welding.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning device for a vertical frame, characterized in that, The system includes a fixed frame (200) for positioning the bottom of the vertical frame (100) and two column units (300) for positioning the sides of the vertical frame (100). The vertical frame (100) includes a bottom crossbeam (101), a top crossbeam (102), and two frame columns (103) located between the bottom crossbeam (101) and the top crossbeam (102). The bottom crossbeam (101) is mounted on the fixed frame (200) via a sliding mechanism. Under the action of the sliding mechanism, the vertical frame (100) can move between an initial position and a combined position. The column units (300) are located on the sides of the frame columns (103) for positioning the frame columns (103).

2. The positioning device for the vertical frame according to claim 1, characterized in that, The sliding mechanism includes a rack (403), a gear (402) meshing with the rack (403), and a sliding motor (401) that drives the gear (402) to rotate. The rack (403) is located at the bottom of the bottom crossbeam (101), and the gear (402) rotates under the action of the sliding motor (401).

3. The positioning device for the vertical frame according to claim 2, characterized in that, The bottom of the bottom crossbeam (101) is provided with a pair of racks (403), the sliding motor (401) has two output shafts, each of which is connected to one end of a coupling (404), the other end of the coupling (404) is provided with a gear (402), and the fixed frame (200) is also provided with a bearing unit (405) for supporting the coupling (404).

4. The positioning device for the vertical frame according to claim 1, characterized in that, The fixed frame (200) is provided with multiple roller support assemblies, each roller support assembly including a wheel frame (202) and a support wheel (201) rotatably mounted on the wheel frame (202), and the bottom crossbeam (101) is able to travel on the support wheel (201).

5. The positioning device for the vertical frame according to claim 4, characterized in that, The bottom of the bottom beam (101) is also provided with a guide rail (107) that can travel on the support wheel (201).

6. The positioning device for the vertical frame according to claim 5, characterized in that, The guide rail (107) is provided with a side guide block (108) on its side, and the fixed frame (200) is provided with a side guide wheel (203) that can act on the side guide block (108).

7. The positioning device for the vertical frame according to claim 1, characterized in that, The fixed frame (200) is provided with a guide groove (204), the guide groove (204) is a C-shaped structure or a channel steel structure, and the bottom crossbeam (101) is provided with a groove guide wheel (109) that can travel in the guide groove (204).

8. The positioning device for the vertical frame according to any one of claims 1-7, characterized in that, The column unit (300) includes a limiting column (301) and a column limiting mechanism disposed on the limiting column (301). The column limiting mechanism includes a column bracket (302), a limiting roller (303), and a lifting cylinder (304) for driving the cylinder limiting roller (303) to move. A connecting bracket (104) is provided on the frame column (103). An installation space for accommodating the limiting part of the connecting bracket (104) is provided between the limiting part of the column bracket (302) and the limiting roller (303). A wedge block (106) is provided on one side of the limiting part of the connecting bracket (104). The wedge block (106) is thinner inside and thicker outside. Under the action of the lifting cylinder (304), the limiting roller (303) can move outward and act on the wedge block (106). The limiting part of the column bracket (302) contacts the other side of the limiting part of the connecting bracket (104).

9. The positioning device for the vertical frame according to claim 8, characterized in that, The column support (302) is provided with a column limiting block (305) on the limiting part, and the other side of the limiting part of the connecting bracket (104) is provided with a frame limiting block (105) that can contact the column limiting block (305).

10. The positioning device for the vertical frame according to claim 8, characterized in that, There are two column limiting mechanisms, which are symmetrically arranged on the limiting column (301).

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