A position accuracy adjustment system shared by multiple vehicle models

Abstract

The present invention discloses a position accuracy adjustment system shared by multiple vehicle types, including a floating support unit and a push head unit, the floating support unit and the push head unit forming a group, at least four groups of which are symmetrically installed on the front, back, left, and right sides of the vehicle body; the floating support unit comprises a mounting base and a linear guide rail arranged on the mounting base, the linear guide rail being arranged in the left and right directions, the linear guide rail being provided with a floating support block slidably connected thereto; a guide column parallel to the linear guide rail is provided on the side thereof, the guide column being provided with a connecting plate slidably matched therewith, the connecting plate being connected to the floating support block; a buffer reset structure is provided in conjunction with the connecting plate; the push head unit comprises a push head pointing towards the vehicle body, and the push head moves back and forth left and right under the action of the push head unit. The present invention has a wide range of applications and high stability, and is applicable to vehicles with different skirt widths and in different states, ensuring accurate vehicle reception; it completely eliminates manual intervention, reduces line failure rate and maintenance man-hours.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle body transfer in a workshop, and in particular to a position accuracy adjustment system shared by multiple vehicle types. Background Art

[0002] During the welding process, the body in white passes through various types of conveying and transferring equipment, such as catenary chains, skids, roller beds, and friction lines. Different equipment often has different positioning benchmarks and positioning structures. During this process, deviations in the body's position and inaccurate positioning can lead to equipment failure or even the risk of the body being scrapped.

[0003] For example, the transfer of a welded car body from Line 1 to Line 2 is typically done as follows: Line 1 → Transfer Machine, Transfer Machine → Side Lift Machine, Side Lift Machine → Line 2. Each step requires specific equipment design to support different car body locations, such as floor profiles or skirts.

[0004] Existing equipment with transfer functions uses fixed, angled guides designed according to the floor profile. After receiving a vehicle, the vehicle body slides down into the guide limits under the guides. Side lifters, which only perform lifting operations, support the skirts on both sides of the vehicle body without requiring guide adjustments.

[0005] During the transfer process from the line to the transfer machine, the transfer mechanism's positioning datum may not be completely aligned with the line due to the mechanism or design. Furthermore, to ensure safe distances during transfer, the transfer machine has a long travel range. This inevitably leads to elastic deformation under heavy loads during vehicle pickup and delivery, causing the vehicle to shift in position. Furthermore, since the inclined guides inevitably require a certain tolerance range to ensure proper positioning, combined with equipment vibration, this can also cause the vehicle's position to shift after transfer.

[0006] In addition, the existing equipment relies on a fixed oblique guide structure to adjust the position of the vehicle body, and a complex support form must be designed according to the structure of the vehicle body floor. There is also an inevitable contradiction: the larger the guide range, the more likely it is to interfere with the vehicle body, and the smaller the guide range, the smaller the adjustment range.

[0007] At the same time, the demand for greater line flexibility is increasing. The number of oblique guide designs required for different vehicle platforms has increased exponentially, leading to increased design and processing costs. Furthermore, these systems are subject to elastic deformation and vibration, resulting in a high failure rate, making repairs difficult and time-consuming, and posing certain safety risks. Summary of the Invention

[0008] In order to solve the problems in the prior art, the present invention provides a position accuracy adjustment system shared by multiple vehicle models, which solves the problems of left and right deviation and distortion occurring during vehicle body transfer, and realizes the transition of the vehicle body from coarse positioning or no positioning to precise positioning system.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0010] A position accuracy adjustment system shared by multiple vehicle models includes a floating support unit and a push head unit. The floating support unit and the push head unit form a set, and at least four sets are installed symmetrically on the front, back, left, and right sides of the vehicle body.

[0011] The floating support unit includes a mounting base and a linear guide rail arranged on the mounting base. The linear guide rail is arranged in the left-right direction. A floating support block is provided on the linear guide rail and is slidably connected to the linear guide rail. The vehicle body sits on the floating support block. A guide column is provided on the side of the linear guide rail and is parallel to the linear guide rail. The guide column is provided with a connecting plate that is slidably matched with the linear guide rail. The connecting plate is connected to the floating support block. A buffer reset structure is provided in conjunction with the connecting plate.

[0012] The push head unit includes a push head, which points to the vehicle body and moves back and forth left and right under the action of the push head unit.

[0013] Furthermore, the buffer reset structure includes adjustment springs respectively sleeved on the guide posts on both sides of the connecting plate; at the same time, both ends of the guide posts are provided with limit stops for limiting the adjustment springs.

[0014] Furthermore, the adjustment springs on both sides of the connecting plate are symmetrically arranged with the connecting plate as the center.

[0015] Furthermore, there are two guide posts, which are symmetrically arranged on both sides of the linear guide rail; each guide post is provided with the connecting plate and the adjustment spring.

[0016] Furthermore, the upper side of the floating support block is configured as a soft layer.

[0017] Furthermore, a groove is provided in the middle of the soft layer.

[0018] Furthermore, the pusher head unit also includes a mounting frame and an electric cylinder arranged on the mounting frame, and the electric cylinder is arranged in the left and right directions and connected to the pusher head.

[0019] Furthermore, the outer side of the pusher head is provided as a soft layer.

[0020] Furthermore, the floating support unit and the push head unit are connected to the PLC control.

[0021] Furthermore, the position accuracy adjustment system shared by multiple vehicle models is installed on the side lift machine.

[0022] Beneficial effects of the present invention:

[0023] The present invention has a wide range of applications and high stability, and can be applied to vehicles with different skirt widths and in different states, ensuring accurate vehicle connection; the structure is exquisite and compact, with high stability, and the success rate of transfer is greatly improved; manual intervention is eliminated, and the line failure rate and maintenance hours are reduced.

[0024] This invention offers a high degree of flexibility and automation. It can achieve different push distances based on different vehicle models through PLC-controlled high-precision pusher units, achieving positioning accuracy of ±1mm. It also offers ample room for expansion and upgrades, and the entire system operates during the normal lifting or lowering of the side roof, without affecting the equipment's cycle time.

[0025] This invention changes the existing side lifter's function of simply lifting up and down, employing a floating support unit to receive vehicles in various vehicle states. This eliminates any deviation or distortion errors between the line body and the transfer machine, and between the transfer machine and the side lifter, allowing vehicle delivery. Furthermore, a flexible, high-precision pusher unit is used to accurately adjust and center the vehicle body. The pusher unit's stroke is adjustable and docks with the line body, enabling automatic adjustment for various vehicle types without affecting the equipment's cycle time. Its compact structure and high stability ensure accurate delivery of vehicles to the final line body.

[0026] When different platform models are produced on the same line, the body chassis structure and skirt width vary significantly. The floating support blocks in this invention can be set to different sizes as needed to meet the skirt connection requirements of multiple models. At the same time, the PLC control system of the high-precision electric cylinder is connected to the conveyor system to realize the transmission of vehicle model signals, meeting the control and precision requirements of different skirts for different models. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a three-dimensional diagram of the floating support unit and the push head unit in the present invention. Figure 1 ;

[0028] Figure 2 This is a three-dimensional diagram of the floating support unit and the push head unit in the present invention. Figure 2 ;

[0029] Figure 3 is a top view of the present invention;

[0030] Figure 4 It is the front view of the present invention.

[0031] The accompanying drawings are for illustrative purposes only and are not to be construed as limitations on this patent. To better illustrate this embodiment, some components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted from the accompanying drawings. DETAILED DESCRIPTION

[0032] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention. Figure 3 The arrow direction is the vehicle body direction.

[0033] like Figures 1 to 4 As shown, this embodiment discloses a position accuracy adjustment system common to multiple vehicle models. The position accuracy adjustment system common to multiple vehicle models in this embodiment is installed on a side lift machine, while ensuring that the height of the vehicle body support surface after modification is consistent with the original one.

[0034] The position accuracy adjustment system shared by multiple vehicle models of the present invention includes a floating support unit 100 and a push head unit 200. The floating support unit 100 and the push head unit 200 form a group and are symmetrically installed in four groups on the front, back, left, and right sides of the vehicle body.

[0035] The floating support unit includes a mounting base 1 mounted on the side jack and a linear guide 2 mounted on the mounting base. The mounting base 1 is mounted on the side jack, and the linear guide 2 is arranged in the left-right direction. The linear guide 2 is provided with a floating support block 3 that is slidably connected to the linear guide 2. The car body skirt sits on the floating support block 3.

[0036] Two guide posts 4 are provided on both sides of the linear guide rail 2 and are parallel to the linear guide rail. The two guide posts 4 are symmetrically arranged on both sides of the linear guide rail. In this embodiment, the guide posts 4 are supported and installed by support plates fixed at both ends of the linear guide rail 2.

[0037] Each guide post 4 is equipped with a sliding connection plate 5, which is fixedly connected to the floating support block 3. A buffering and reset mechanism is provided in conjunction with the connection plate. In this embodiment, the buffering and reset mechanism comprises adjustment springs 6 sleeved on the guide posts 4 on either side of the connection plate 5. Limiting springs 41 are provided at each end of the guide posts 4 to constrain the adjustment springs 6.

[0038] Specifically, the adjustment springs 6 on both sides of the connecting plate 5 are symmetrically arranged with the connecting plate 5 as the center. When there is no vehicle body load, the floating support block 3 is stopped at the middle position by the force of the adjustment springs 6 of the same specification on both sides.

[0039] In this embodiment, the upper side of the floating support block 3 is provided with a soft layer. The soft layer is preferably made of polyurethane, and a groove is provided in the middle of the soft layer to facilitate the placement of the vehicle body.

[0040] The floating support unit 100 of the present invention utilizes linear guide rails 2 to support the floating support block 3. When unloaded, the floating support block 3 remains stationary in the center position thanks to the force of the identically sized adjustment springs 6 on both sides. When loaded, the pusher unit 200 activates the floating support block 3, driven by the vehicle body, and moves along the linear guide rails. By symmetrically installing four groups of support blocks along the front and rear of the vehicle, accurate vehicle handling is achieved, even under twisted and left-right vehicle conditions.

[0041] The pusher head unit 200 includes a mounting frame 9, an electric cylinder 8, and a pusher head 7. The electric cylinder 8 is mounted on the mounting frame 9 in the left-right direction. The electric cylinder 8 is connected to the pusher head 7 and directs the pusher head 7 toward the vehicle body. The pusher head 7 moves back and forth under the action of the electric cylinder 8. Preferably, the electric cylinder 8 is a servo electric cylinder.

[0042] In this embodiment, the outer side of the pusher head 7 is provided with a soft layer, and the soft layer is preferably made of polyurethane.

[0043] The floating support unit 100 and the push head unit 200 are connected to the PLC control.

[0044] The present invention is an automated vehicle receiving and position adjustment system composed of four groups of floating support units 100 and push head units 200 controlled by PLC.

[0045] Among them, the floating support block 3 installed on the linear guide rail is cleverly connected to the adjustment spring 6, which can stably accept various vehicle body states caused by various transfers within a large range.

[0046] At the same time, the electric cylinder 8 acts on the push head 7 to push the body skirt sitting on the floating support block 3. The four groups of push heads move simultaneously to achieve high-precision positioning of the body under the condition of uniform force.

[0047] The specific working principle of the present invention is as follows:

[0048] After the vehicle body is positioned on the floating support unit 100, the PLC controls four sets of high-precision servo electric cylinders 8 to simultaneously drive the push heads 7 to move in opposite directions according to the set stroke, pushing the vehicle body skirt from the outside to the inside, thereby driving the vehicle body to move on the floating support block 3. When the vehicle body has a unilateral offset, it can be adjusted unidirectionally by the action of the unilateral electric cylinder 8 and the push head 7. When the vehicle body has an oblique distortion, it can be driven by the opposite electric cylinder 8 to perform a bidirectional centering adjustment. Generally, the push head pusher stroke can be adjusted according to the width of the vehicle body skirt and the accuracy requirements of the vehicle receiving trolley / mechanism. It is set so that the push head working stroke is 2mm greater than the width of the vehicle body skirt, that is, the positioning requirement of the vehicle body within ±1mm is achieved.

[0049] When different platform models are produced on the same line, the body chassis structure and skirt width vary significantly. The floating support block 3 in the present invention can be set to different sizes as needed to meet the skirt connection requirements of multiple models. At the same time, the PLC control system of the high-precision electric cylinder 8 is connected to the conveyor system to realize the transmission of vehicle model signals, and meet the control and precision requirements of different skirts for different models.

[0050] This invention changes the existing side lifter's function of simply lifting up and down, employing a floating support unit to receive vehicles in various vehicle states. This eliminates any deviation or distortion errors between the line body and the transfer machine, and between the transfer machine and the side lifter, allowing vehicle delivery. Furthermore, a flexible, high-precision pusher unit is used to accurately adjust and center the vehicle body. The pusher unit's stroke is adjustable and docks with the line body, enabling automatic adjustment for various vehicle types without affecting the equipment's cycle time. Its compact structure and high stability ensure accurate delivery of vehicles to the final line body.

[0051] The present invention has a wide range of applications and high stability, and is suitable for vehicles with different skirt widths and in different states, ensuring accurate vehicle connection; the structure is exquisite and compact, with high stability, and the success rate of transfer is greatly improved; manual intervention is eliminated, and the line failure rate and maintenance hours are reduced.

[0052] This invention offers a high degree of flexibility and automation. It can achieve different push distances based on different vehicle models through PLC-controlled high-precision pusher units, achieving positioning accuracy of ±1mm. It also offers ample room for expansion and upgrades, and the entire system operates during the normal lifting or lowering of the side roof, without affecting the equipment's cycle time.

[0053] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

[0054] If words such as "first" and "second" are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, the above words have no special meaning.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

Claims

1. A method for adjusting the position accuracy of multiple vehicle models, using a position accuracy adjustment system, characterized by: The position accuracy adjustment system includes a floating support unit and a push head unit. The floating support unit and the push head unit form a group, and at least four groups are installed symmetrically on the front, back, left and right sides of the vehicle body. The floating support unit includes a mounting base and a linear guide rail arranged on the mounting base. The linear guide rail is arranged in the left-right direction. A floating support block is provided on the linear guide rail and is slidably connected to the linear guide rail. The vehicle body sits on the floating support block. A guide column is provided on the side of the linear guide rail and is parallel to the linear guide rail. A connecting plate is provided on the guide column and is slidably matched with the linear guide rail. The connecting plate is connected to the floating support block. A buffer reset structure is provided in conjunction with the connecting plate. The upper side of the floating support block is set as a soft layer; A groove is provided in the middle of the soft layer; The pusher unit includes a pusher head, which points to the vehicle body and moves back and forth under the action of the pusher head unit; The pusher head unit further includes a mounting frame and an electric cylinder disposed on the mounting frame, the electric cylinder being arranged in the left-right direction and connected to the pusher head; The outer side of the pusher head is set as a soft layer; The floating support unit and the push head unit are connected to the PLC control; Position accuracy adjustment methods include: When the car body is positioned on the floating support unit, the PLC controls four sets of electric cylinders to simultaneously drive the push heads to move toward each other according to the set stroke, pushing the car body skirt from the outside to the inside, thereby driving the car body to move on the floating support block; When the vehicle body has unilateral offset, it can be adjusted in one direction by the action of the unilateral electric cylinder and the push head; when the vehicle body has oblique distortion, it can be driven by the opposite electric cylinder to perform bidirectional centering adjustment.

2. The position accuracy adjustment method for multiple vehicle types according to claim 1, characterized in that: The buffer reset structure includes adjustment springs respectively sleeved on the guide posts on both sides of the connecting plate; at the same time, both ends of the guide posts are provided with limit stops for limiting the adjustment springs.

3. The position accuracy adjustment method for multiple vehicle types according to claim 2, characterized in that: The adjustment springs on both sides of the connecting plate are symmetrically arranged with the connecting plate as the center.

4. The position accuracy adjustment method for multiple vehicle types according to claim 1 or 3, characterized in that: There are two guide posts, which are symmetrically arranged on both sides of the linear guide rail; each guide post is provided with the connecting plate and the adjusting spring.

5. The position accuracy adjustment method for multiple vehicle types according to claim 1, characterized in that: The position accuracy adjustment system is installed on the side lift machine.

Images