Assembly tool for a vehicle body underframe mounting member

Abstract

The utility model relates to tooling technical field provides a kind of assembly tool for installing component on vehicle body underframe, including positioning support mechanism, sleeve joint mechanism, mounting seat and driving mechanism, positioning support mechanism is used to support, positioning target component;Sleeve joint mechanism is sleeved in the target crossbeam of vehicle body underframe;Any one of positioning support mechanism and sleeve joint mechanism can be detachably connected with mounting seat;Driving mechanism can drive mounting seat to move along any one of the transverse, longitudinal and vertical of vehicle body underframe.In the installation target component, target component is first spot-welded with target crossbeam pre-connection, then the welding fixation of both sides.Positioning support mechanism can avoid the position dislocation of target component during pre-connection to ensure the installation accuracy of target component.Welding fixation before using sleeve joint mechanism makes target crossbeam occur reverse deformation, and the welding deformation of target crossbeam occurs after welding will offset the above-mentioned reverse deformation, reduce or avoid the deformation amount of target crossbeam finally.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology, and provides an assembly tooling for installing components on a vehicle chassis. Background Technology

[0002] During the manufacturing process of a rail vehicle body, some components are installed on the crossbeams of the body underframe. For example, longitudinal beams are welded and fixed between two adjacent crossbeams. When installing longitudinal beams, it is necessary to ensure the horizontality of the lower surface of the longitudinal beam (the included angle between the lower surface of the longitudinal beam and the lower surface of the crossbeam is less than a preset value), otherwise it will affect the installation accuracy and overall strength of the undercarriage suspension components.

[0003] Currently, when installing longitudinal beams, it is often necessary to manually measure the positions of both ends of the beam to determine their final installation location. Errors exist during measurement, and when the longitudinal beam is fixed to the crossbeam, positional misalignment is inevitable, making it difficult to guarantee installation accuracy. Furthermore, after determining the position of the longitudinal beam, welding its ends to the crossbeam causes thermal stress during welding, leading to bending deformation of the crossbeam. The straightness deviation rate of the crossbeam can be as high as 30%, severely affecting the stability and safety of the vehicle body. To correct the bending deformation of the crossbeam, manual hammering is required, which is inefficient, labor-intensive, and difficult to control in terms of accuracy. Moreover, this adjustment can easily damage the workpiece surface, leading to a decline in material properties and reduced corrosion resistance, failing to meet the high-quality requirements of rail vehicle body manufacturing.

[0004] Therefore, how to solve the problems of difficulty in ensuring the installation accuracy of components and severe welding deformation of crossbeams in the installation of crossbeams on the vehicle chassis in related technologies has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0005] This utility model provides an assembly fixture for installing components on a vehicle chassis frame, which solves the defects in related technologies where the installation accuracy of components is not easily guaranteed and the welding deformation of the crossbeam is severe. This improves the installation accuracy of components and reduces or avoids the welding deformation of the crossbeam.

[0006] This utility model provides an assembly fixture for mounting components on a vehicle chassis, comprising: A positioning support mechanism is used to support the target component and position the target component. A sleeve mechanism is used to sleeve onto the outside of a target crossbeam of the vehicle body underframe; Mounting base, either the positioning support mechanism or the sleeve mechanism can be detachably connected to the mounting base; A drive mechanism is disposed below the vehicle body chassis, and the mounting base is disposed at the output end of the drive mechanism. The drive mechanism is capable of driving the mounting base to move along any one of the transverse, longitudinal, and vertical directions of the vehicle body chassis.

[0007] According to the present invention, an assembly fixture for mounting components on a vehicle chassis frame is provided, wherein the positioning support mechanism includes: The bracket has a first side surface as a bearing base surface and a second side of the bracket is provided with a first connector for detachable connection with the mounting base. A positioning block is disposed on the first side of the bracket, and the positioning block has a positioning reference surface, which is used to abut against the target component; A ranging element is disposed on the positioning block, and the ranging element is used at least to detect the distance between the positioning reference surface and the measurement reference.

[0008] According to the present invention, an assembly fixture for mounting components on a vehicle chassis is provided, wherein the size of the bearing base surface along the longitudinal direction of the vehicle chassis is larger than the size of the target component.

[0009] According to the present invention, an assembly fixture for mounting components on a vehicle body underframe is provided, wherein the opposite ends of the bracket are bent toward a second side of the bracket to form a pair of bending ribs, the axis of the bending ribs being parallel to the longitudinal direction of the vehicle body underframe, and the pair of bending ribs being distributed laterally at intervals along the vehicle body underframe.

[0010] According to the present invention, an assembly fixture for mounting components on a vehicle chassis frame is provided, wherein the sleeve mechanism includes: A first plate, a second plate, and a third plate are fixedly connected in sequence. The first plate and the third plate are parallel to each other and spaced apart. The second plate is disposed between the first plate and the third plate. A through groove is formed between the first plate and the third plate for the target beam to pass through. A second connector is provided on the side of the first plate away from the third plate. The second connector is used for detachable connection with the mounting base.

[0011] According to the present invention, an assembly fixture for mounting components on a vehicle chassis frame is provided, wherein the sleeve mechanism further includes: A limiting rod is provided on the first plate and the third plate, and the target beam has a through hole through which the limiting rod passes. The limiting rod passes through the limiting hole and the through hole of the target beam. Fastening assembly for detachably securing the limiting rod to the first plate and the third plate.

[0012] According to the present invention, an assembly fixture for mounting components on a vehicle chassis frame is provided, wherein the sleeve mechanism further includes: A clamping member is disposed in at least one of the first plate and the third plate, the clamping member being used to clamp against the target beam along the distribution direction of the first plate and the third plate.

[0013] According to the present invention, an assembly fixture for mounting components on a vehicle chassis is provided, wherein the drive mechanism includes: The longitudinal drive assembly is located on the foundation ground below the vehicle body chassis; A lateral drive assembly is disposed at the output end of the longitudinal drive assembly, and the longitudinal drive assembly is used to drive the lateral drive assembly to move longitudinally along the chassis of the vehicle body. A vertical drive assembly is disposed at the output end of the lateral drive assembly. The lateral drive assembly is used to drive the vertical drive assembly to move laterally along the vehicle body chassis. A mounting base is disposed at the output end of the vertical drive assembly. The vertical drive assembly is used to drive the mounting base to move vertically along the vehicle body chassis.

[0014] According to the present invention, an assembly fixture for mounting components on a vehicle chassis is provided. The longitudinal drive assembly includes at least two longitudinal drive rails, each of which is mounted on the base ground via an adjustable foot. The adjustable foot is used to adjust the distance between the longitudinal drive rail and the base ground.

[0015] According to the present invention, an assembly fixture for mounting components on a vehicle chassis is provided, wherein the vertical drive assembly includes a hydraulic cylinder, and a displacement detection element is provided inside the hydraulic cylinder for detecting the displacement of the piston rod of the hydraulic cylinder.

[0016] This utility model provides an assembly fixture for mounting components on a vehicle chassis, comprising a positioning support mechanism, a sleeve mechanism, a mounting base, and a drive mechanism. The drive mechanism is located below the vehicle chassis, and the mounting base is located at the output end of the drive mechanism. The drive mechanism can drive the mounting base to move along any one of the transverse, longitudinal, or vertical directions of the vehicle chassis. Either the positioning support mechanism or the sleeve mechanism can be detachably connected to the mounting base. When the positioning support mechanism or the sleeve mechanism is mounted on the mounting base, it can move together with the mounting base under the action of the drive mechanism, thereby adjusting the relative position of the positioning support mechanism and the vehicle chassis, or adjusting the relative position of the sleeve mechanism and the vehicle chassis. The positioning support mechanism supports and positions the target component. The sleeve mechanism is fitted onto the outside of a target crossbeam on the vehicle chassis. When the sleeve mechanism is mounted on the mounting base, the drive mechanism drives the mounting base to move, and the sleeve mechanism can exert a force in a corresponding direction on the target crossbeam. When installing the target component on the vehicle chassis, the positioning support mechanism is first installed onto the mounting base. The target component is then placed on the positioning support mechanism and positioned. The positions of the mounting base, positioning support mechanism, and target component are adjusted by the drive mechanism. After the target component is positioned, it is pre-connected by spot welding to the target crossbeam. During pre-connection, the support mechanism of the positioning support mechanism prevents the target component from shifting, ensuring the installation accuracy of the target component. Then, the positioning support mechanism is removed, and the sleeve mechanism is installed onto the mounting base, so that the sleeve mechanism is sleeved on the outside of the target crossbeam. The drive mechanism drives the mounting base and sleeve mechanism to move, applying force to the target crossbeam and causing it to deform in the opposite direction. The target component is then welded to the target crossbeam. The welding deformation of the target crossbeam can offset the above-mentioned reverse deformation, thereby reducing or avoiding the final deformation of the target crossbeam. This setup solves the problems of difficulty in ensuring the installation accuracy of components and severe welding deformation of crossbeams when installing components on the crossbeam of the vehicle chassis in related technologies. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a front view of the assembly fixture provided by this utility model for installing components on the vehicle chassis when the longitudinal beam is supported by a positioning support mechanism.

[0019] Figure 2This is a side view of the assembly fixture provided by this utility model for installing components on the vehicle chassis, in which the longitudinal beam is supported by a positioning support mechanism to connect the longitudinal beam with the target crossbeam.

[0020] Figure 3 This is a side view of the assembly tooling provided by this utility model for installing components on the vehicle chassis when connected to the target crossbeam using a sleeve mechanism.

[0021] Figure label: 1. Target beam; 2. Mounting base; 3. Bracket; 4. First connecting piece; 5. Positioning block; 6. Distance measuring element; 7. Sleeve; 8. Second connecting piece; 9. Limiting rod; 10. Clamping piece; 11. Longitudinal drive guide rail; 12. Lateral drive guide rail; 13. Hydraulic cylinder; 14. Longitudinal beam. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] The following is combined Figures 1 to 3 This invention describes an assembly tooling for mounting components on a vehicle chassis.

[0024] like Figures 1 to 3 As shown, the assembly fixture for mounting components on a vehicle chassis provided in this embodiment of the present invention includes a positioning support mechanism, a sleeve mechanism, a mounting base 2, and a drive mechanism.

[0025] Specifically, the drive mechanism is located below the vehicle body chassis, and the mounting base 2 is located at the output end of the drive mechanism. The drive mechanism can drive the mounting base 2 to move along any one of the following directions: the transverse direction, the longitudinal direction, and the vertical direction of the vehicle body chassis. Specifically, the longitudinal direction of the vehicle body chassis aligns with the front-to-back direction of the vehicle body; the transverse direction aligns with the left-to-right direction; and the vertical direction aligns with the vertical direction of the vehicle body. The longitudinal and transverse directions of the vehicle body chassis are generally horizontal, and correspondingly, the vertical direction is vertical.

[0026] Either the positioning support mechanism or the socketing mechanism can be detachably connected to the mounting base 2. The positioning support mechanism or the socketing mechanism is set on the mounting base 2, and the positioning support mechanism or the socketing mechanism can move together with the mounting base 2 under the action of the drive mechanism, thereby realizing the adjustment of the relative position of the positioning support mechanism and the vehicle body frame or the adjustment of the relative position of the socketing mechanism and the vehicle body frame.

[0027] The positioning support mechanism is used to support the target component and position it. The sleeve mechanism is used to sleeve the target crossbeam 1 on the outside of the vehicle body chassis. When the sleeve mechanism is set on the mounting base 2, the drive mechanism drives the mounting base 2 to move, and the sleeve mechanism can generate a force in the corresponding direction on the target crossbeam 1.

[0028] When installing the target component on the vehicle chassis, first install the positioning support mechanism onto the mounting base 2, place the target component on the positioning support mechanism, and position the target component. Adjust the positions of the mounting base 2, the positioning support mechanism, and the target component through the drive mechanism. After adjusting the position of the target component, spot weld the target component to the target crossbeam 1 for pre-connection.

[0029] During pre-connection, the positioning support mechanism supports the target component, which can prevent the target component from shifting and ensure the installation accuracy of the target component.

[0030] Then, the positioning support mechanism is removed, and the sleeve mechanism is installed onto the mounting base 2, so that the sleeve mechanism is sleeved on the outside of the target beam 1. The mounting base 2 and the sleeve mechanism are moved by the drive mechanism to apply a force to the target beam 1, causing the target beam 1 to undergo a reverse deformation. The target component is then welded and fixed together with the target beam 1. The welding deformation of the target beam 1 can offset the above-mentioned reverse deformation, thereby reducing or avoiding the final deformation of the target beam 1.

[0031] This design solves the problems of difficulty in ensuring the installation accuracy of components and severe welding deformation of crossbeams in the related technologies when installing components on the crossbeams of the vehicle body chassis. It effectively avoids manual adjustments, improves installation efficiency, optimizes welding quality, and reduces production costs.

[0032] It should be noted that when the target beam 1 is deformed in the opposite direction by using the sleeve mechanism and the drive mechanism, the welding deformation direction and welding deformation amount of the target beam 1 are determined by simulation analysis. Then, the sleeve mechanism is used to make the target beam 1 deform in the opposite direction to the welding deformation and the deformation amount is consistent with the welding deformation amount.

[0033] In this embodiment of the utility model, the positioning support mechanism includes a bracket 3, a positioning block 5, and a ranging element 6.

[0034] The first side surface of the bracket 3 serves as a bearing base surface for supporting the target component. The positioning block 5 is disposed on the first side of the bracket 3. The positioning block 5 has a positioning reference surface, which is used to abut against the target component to position the target component and ensure the positional accuracy of the target component on the bracket 3.

[0035] The ranging element 6 is disposed on the positioning block 5. The ranging element 6 is used at least to detect the distance between the positioning reference surface and the measurement reference, that is, to measure the distance between the target component and the measurement reference, so as to determine the position of the target component.

[0036] The aforementioned measurement reference can be some structural surfaces on the vehicle body chassis, or it can be the longitudinal centerline or the transverse centerline of the vehicle body chassis. The longitudinal centerline of the vehicle body chassis is along the longitudinal direction of the vehicle body chassis, and the transverse centerline of the vehicle body chassis is along the transverse direction of the vehicle body chassis. When the longitudinal centerline or the transverse centerline of the vehicle body chassis is used as the measurement reference, a structural surface can be set at the centerline position as the measurement reference.

[0037] The aforementioned ranging element 6 can be a laser rangefinder, specifically one capable of measuring distances in multiple directions. Specifically, the positioning reference surface of the positioning block 5 is perpendicular to the transverse direction of the vehicle chassis. Using the longitudinal and transverse centerlines of the vehicle chassis as measurement references, the laser rangefinder can measure both the distance between the positioning reference surface and the longitudinal centerline of the vehicle chassis, and the distance between the laser rangefinder and the transverse centerline of the vehicle chassis. This allows for the determination of the target component's position in the transverse and longitudinal directions of the vehicle chassis, facilitating rapid and precise adjustment of the target component's position.

[0038] The laser rangefinder can be, but is not limited to, the ZDM-T01 model.

[0039] A first connector 4 is provided on the second side of the bracket 3. The first connector 4 is used to detachably connect with the mounting base 2, thereby realizing the detachable connection between the positioning support mechanism and the mounting base 2.

[0040] Specifically, the first connector 4 includes a first connecting rod and a first nut. A connecting hole is provided on the mounting base 2, through which the first connecting rod can pass. By threading the first nut onto the first connecting rod on the side of the mounting base 2 away from the bracket 3, the bracket 3 can be connected to the mounting base 2. Removing the first nut allows the bracket 3 to be removed from the mounting base 2.

[0041] Based on the shape of the lower surface of the target component when it is installed on the vehicle chassis, the bearing base surface of bracket 3 is determined so that its shape matches the shape of the lower surface of the target component when it is installed on the vehicle chassis. When the target component is a longitudinal beam 14, the lower surface of the longitudinal beam 14 is a plane perpendicular to the vertical direction of the vehicle chassis. In this case, the bearing base surface of bracket 3 can be set as a plane perpendicular to the vertical direction of the vehicle chassis. If the target component is another suspension component, the shape of the bearing base surface of bracket 3 can be determined based on the shape of the lower surface of the suspension component when it is installed on the vehicle chassis.

[0042] In this embodiment, the size of the bearing base surface along the longitudinal direction of the vehicle chassis is larger than the size of the target component. The bearing base surface of the bracket 3 can fully support the target component. Moreover, the two ends of the bearing base surface are not covered by the target component. When the target component is the longitudinal beam 14, when determining the relative position of the longitudinal beam 14 and the target crossbeam 1 along the vertical direction of the vehicle chassis, after determining the transverse and longitudinal positions of the longitudinal beam 14 along the vehicle chassis, the mounting base 2, the bracket 3, and the longitudinal beam 14 are driven to move vertically along the vehicle chassis by the drive mechanism. When the two ends of the bearing base surface abut against the lower surface of the target crossbeam 1, it indicates that the lower surface of the longitudinal beam 14 is flush with the lower surface of the target crossbeam 1. As long as the machining accuracy of the bearing base surface of the bracket 3 is ensured, the levelness of the lower surface of the longitudinal beam 14 can be ensured. The levelness of the lower surface of the longitudinal beam 14 is that the included angle between the lower surface of the longitudinal beam 14 and the lower surface of the target crossbeam 1 is less than a predetermined value.

[0043] In some embodiments, the bracket 3 is formed from sheet metal, such that the opposite ends of the bracket 3 are bent toward a second side of the bracket 3 to form a pair of bending ribs. The axis of the bending ribs is parallel to the longitudinal direction of the vehicle body underframe, and the pair of bending ribs are distributed laterally at intervals along the vehicle body underframe.

[0044] The bending ribs can improve the rigidity and bending strength of the bracket 3, improve the flatness of the bearing base, improve the stability of the bracket 3 and the target component, and improve the installation accuracy of the target component.

[0045] The bracket 3 mentioned above can be made of 304 stainless steel plate with a thickness of 8 mm.

[0046] In this embodiment of the utility model, the socketing mechanism includes a first plate, a second plate, and a third plate.

[0047] The first and third plates are parallel to each other and spaced apart. The second plate is positioned between the first and third plates, specifically perpendicular to the first and third plates. The first, second, and third plates are sequentially fixedly connected to form a U-shaped socket 7.

[0048] A through-slot is provided between the first plate and the third plate. When the sleeve mechanism is installed on the mounting base 2, both the first and third plates are perpendicular to the vertical direction of the vehicle body underframe, and the second plate is perpendicular to the longitudinal direction of the vehicle body underframe. The through-slot extends laterally along the vehicle body underframe, allowing the target crossbeam 1 to pass through.

[0049] Through the interaction between the first plate and the target crossbeam 1 and the interaction between the third plate and the target crossbeam 1, a vertical force can be generated on the target crossbeam 1 along the vehicle body underframe, causing the target crossbeam 1 to undergo a reverse deformation along the vertical direction of the vehicle body underframe.

[0050] The first plate, the second plate, and the third plate mentioned above can be made of Q355B steel with a thickness of 10 mm.

[0051] A second connector 8 is provided on the side of the first plate away from the third plate. The second connector 8 is used to detachably connect with the mounting base 2, thereby realizing the detachable connection between the sleeve mechanism and the mounting base 2.

[0052] Specifically, the second connector 8 has the same structure as the first connector 4, and includes a second connecting rod and a second nut. The second connecting rod has the same dimensions as the first connecting rod, and it can also pass through a connecting hole on the mounting base 2. By threading the second nut onto the second connecting rod on the side of the mounting base 2 away from the first plate, the socket 7 can be connected to the mounting base 2. By removing the second nut, the socket 7 can be removed from the mounting base 2.

[0053] In a further embodiment, the sleeve mechanism also includes a limiting rod 9 and a fastening assembly.

[0054] Limiting holes are provided on the first and third plates, and the limiting rod 9 can pass through the limiting holes on the first and third plates. The target beam 1 has a through hole through which the limiting rod 9 can pass. This through hole can be, but is not limited to, a weight reduction hole on the target beam 1.

[0055] The sleeve 7 is fitted onto the outside of the target beam 1, so that the limiting holes on the first plate and the third plate correspond to the through holes on the target beam 1, allowing the limiting rod 9 to pass through. The fastening assembly is used to detachably fix the limiting rod 9 to the first plate and the third plate.

[0056] The interaction between the limiting rod 9 and the target crossbeam 1 can limit the relative position of the target crossbeam 1 and the sleeve 7, preventing the sleeve 7 from separating from the target crossbeam 1 along the longitudinal direction of the vehicle chassis.

[0057] The fastening assembly includes a pair of third nuts, which are located on the side of the first plate and the third plate that are far apart from each other. The third nuts are threadedly connected to the limit rod 9.

[0058] In this embodiment, the sleeve mechanism further includes a clamping member 10, which is disposed in at least one of the first plate and the third plate. The clamping member 10 is used to clamp against the target beam 1 along the distribution direction of the first plate and the third plate.

[0059] When the vertical dimension of the target beam 1 along the vehicle chassis is consistent with the distance between the first plate and the third plate, the first plate and the third plate can simultaneously maintain contact with the target beam 1, and the target beam 1 and the sleeve 7 are relatively stable and will not wobble relative to each other.

[0060] When the vertical dimension of the target crossbeam 1 along the vehicle chassis is smaller than the distance between the first plate and the third plate, there is a gap between the first plate and the target crossbeam 1, or between the third plate and the target crossbeam 1. The first plate and the third plate cannot simultaneously maintain contact with the target crossbeam 1, resulting in relative swaying between the target crossbeam 1 and the sleeve 7. In this embodiment, the clamping member 10 can be used to apply a clamping force to the target crossbeam 1 to ensure the relative stability of the target crossbeam 1 and the sleeve 7, thus preventing relative swaying.

[0061] In a specific embodiment, the aforementioned clamping member 10 may be, but is not limited to, a hydraulic cylinder. The cylinder barrel of the hydraulic cylinder is disposed outside the sleeve member 7, and the piston rod of the hydraulic cylinder can enter the interior of the sleeve member 7 by passing through the first plate or the third plate.

[0062] Figure 3 In the middle, abutting members 10 are respectively provided on the first plate and the third plate.

[0063] In this embodiment of the invention, the driving mechanism includes a longitudinal driving component, a transverse driving component, and a vertical driving component.

[0064] The longitudinal drive assembly is located on the foundation ground below the vehicle body chassis, and the lateral drive assembly is located at the output end of the longitudinal drive assembly. The longitudinal drive assembly is used to drive the lateral drive assembly to move longitudinally along the vehicle body chassis.

[0065] The vertical drive assembly is located at the output end of the lateral drive assembly, and the lateral drive assembly is used to drive the vertical drive assembly to move laterally along the vehicle body underframe. The mounting base 2 is located at the output end of the vertical drive assembly, and the vertical drive assembly is used to drive the mounting base 2 to move vertically along the vehicle body underframe.

[0066] Thus, by combining the longitudinal drive assembly, the lateral drive assembly, and the vertical drive assembly, the mounting base 2, the positioning support mechanism, and the sleeve mechanism can be moved longitudinally, laterally, and vertically along the vehicle body underframe.

[0067] In this embodiment, the longitudinal drive assembly includes at least two longitudinal drive rails 11, each longitudinal drive rail 11 is distributed laterally along the vehicle body underframe, and each longitudinal drive rail 11 extends longitudinally along the vehicle body underframe.

[0068] like Figure 1 As shown, the longitudinal drive assembly includes four longitudinal drive rails 11.

[0069] Each longitudinal drive rail 11 is mounted on the foundation ground via adjustable feet. The adjustable feet are used to adjust the distance between the longitudinal drive rail 11 and the foundation ground, thereby adjusting the levelness of the longitudinal drive rail 11 and ensuring that the extension direction of the longitudinal drive rail 11 is perpendicular to the vertical direction of the vehicle body chassis. This is beneficial to improving the installation accuracy of the target component and the control accuracy of the welding deformation of the target beam 1.

[0070] The lateral drive assembly can also be configured as a drive rail structure. The lateral drive assembly includes a lateral drive rail 12, which extends laterally along the chassis of the vehicle body and is mounted on each longitudinal drive rail 11.

[0071] Both the transverse drive rail 12 and the longitudinal drive rail 11 are made of high-strength alloy steel, and the adjustable feet can achieve a height adjustment of ±5 mm. Each longitudinal drive rail 11 corresponds to multiple adjustable feet.

[0072] In this embodiment, the vertical drive assembly includes a hydraulic cylinder 13. The axis of the hydraulic cylinder 13 is arranged vertically along the vehicle chassis frame. The cylinder barrel of the hydraulic cylinder 13 is fixed to the moving end of the transverse drive guide rail 12, and the piston rod of the hydraulic cylinder 13 is used to connect to the mounting base 2. The extension and retraction of the hydraulic cylinder 13 can drive the mounting base 2 to move vertically along the vehicle chassis frame.

[0073] The hydraulic cylinder 13, as a vertical drive component, has the advantages of simple structure, flexible operation, and strong load-bearing capacity. It can generate a large force on the target beam 1 to ensure that the target beam 1 can undergo reverse deformation.

[0074] Hydraulic cylinder 13 can be, but is not limited to, the HSG-K80 / 45 type hydraulic retraction rod, with a rated pressure of 16 MPa, a maximum thrust of 80 kN, and a stroke of 300 mm. When used in conjunction with an electromagnetic proportional valve, it can achieve stepless adjustment of the flow rate within the range of 0–5 L / min, thereby controlling the extension and retraction speed of the retraction rod within the range of 0–50 mm / s.

[0075] A displacement detection element is provided inside the hydraulic cylinder 13. The displacement detection element is used to detect the displacement of the piston rod of the hydraulic cylinder in order to measure the vertical position of the positioning support mechanism or the sleeve mechanism along the chassis frame.

[0076] The displacement detection element mentioned above can be, but is not limited to, a displacement sensor.

[0077] The displacement detection element, the aforementioned distance measuring element 6, the longitudinal drive assembly, the lateral drive assembly, and the vertical drive assembly are all electrically connected to the controller to control the operation of the longitudinal drive assembly, the lateral drive assembly, and the vertical drive assembly based on the data detected by the displacement detection element and the distance measuring element 6.

[0078] It should be noted that, in the case of installing the target component on the vehicle body underframe, if the target component is a longitudinal beam 14, since the two ends of the longitudinal beam 14 are fixedly connected to two adjacent crossbeams, and the length of the longitudinal beam 14 is fixed, the crossbeams will be restricted from bending deformation along the longitudinal direction of the vehicle body underframe. The two crossbeams will only undergo bending deformation along the vertical direction of the vehicle body underframe. If the target component is another suspension component, and the suspension component is welded and fixed to the lower surface of the crossbeam, then the crossbeam will not undergo bending deformation along the longitudinal direction of the vehicle body underframe, but only bending deformation along the vertical direction of the vehicle body underframe.

[0079] The process of determining the welding deformation direction and amount of the target beam 1 through simulation analysis can be completed using ANSYS finite element analysis software. It requires inputting the material parameters of the target beam 1 (material type, elastic modulus and Poisson's ratio), plate thickness, welding process parameters (welding current, welding voltage and welding speed), etc., and calculating the heat input and deformation trend during the welding process, thereby predicting the amount and direction of welding deformation.

[0080] If the target crossbeam 1 is predicted to deform vertically downward along the vehicle body underframe, an upward force is applied to the target crossbeam 1 via the hydraulic cylinder 13 and the sleeve mechanism to induce an equal amount of upward pre-deformation in the target crossbeam 1. If the target crossbeam 1 is predicted to deform vertically upward along the vehicle body underframe, a downward force is applied to the target crossbeam 1 via the hydraulic cylinder 13 and the sleeve mechanism to induce an equal amount of downward pre-deformation in the target crossbeam 1.

[0081] During the welding process, the force exerted on the target beam 1 by the hydraulic cylinder 13 and the sleeve mechanism can be adjusted in real time according to the actual deformation of the target beam 1 to ensure effective control of its deformation. Specifically, during the welding process, an infrared thermometer can be used to monitor the temperature field of the welding area in real time. When the local temperature exceeds 600 degrees Celsius, the pressure of the hydraulic cylinder 13 is adjusted to compensate in real time at a rate of 0.01 mm / ℃ to counteract thermal deformation. Simultaneously, a laser tracker is used to scan the contour of the target beam 1 during the welding process of each weld. If the deformation of the target contour exceeds the tolerance, the extension and pressure of the hydraulic cylinder 13 are immediately adjusted to ensure welding quality.

[0082] The assembly fixture for installing components on the vehicle chassis in this embodiment of the invention enables single-person operation to complete the installation and welding deformation control of the target components, greatly improving installation efficiency and reducing labor costs and intensity. The assembly fixture for installing components on the vehicle chassis in this embodiment of the invention has a reasonable structural design, is simple and convenient to operate, and operators can become proficient after only simple training. It is applicable to the installation and welding deformation control of different components, enhancing adaptability to different production tasks.

[0083] Extensive testing and measurement revealed that the assembly fixture used in this embodiment for mounting components on the vehicle chassis can control the levelness of the lower surface of the target component (the levelness of the lower surface of the target component is defined as the angle between the lower surface of the target component and the lower surface of the target crossbeam 1 being less than a predetermined value) to within 0.2 mm / m, and the straightness of the target crossbeam 1 to within 0.1 mm / m. The welding deformation of the target crossbeam 1 is controlled to within 0.3 mm, eliminating the need for post-weld heat treatment.

[0084] In addition, after testing, the surface roughness of the crossbeam is less than or equal to 1.6μm after the assembly tooling for mounting components on the vehicle chassis in this embodiment of the present invention is installed, and no rust phenomenon is observed in the salt spray test, which significantly improves the product quality and reliability.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An assembly tooling for mounting components on a vehicle chassis, characterized in that, include: A positioning support mechanism is used to support the target component and position the target component. A sleeve mechanism is used to be sleeved on the outside of the target crossbeam (1) of the vehicle body underframe; Mounting base (2), either the positioning support mechanism or the sleeve mechanism can be detachably connected to the mounting base (2); A drive mechanism is located below the vehicle body chassis. The mounting base (2) is located at the output end of the drive mechanism. The drive mechanism can drive the mounting base (2) to move along any one of the transverse direction, longitudinal direction, and vertical direction of the vehicle body chassis.

2. The assembly fixture for mounting components on a vehicle chassis according to claim 1, characterized in that, The positioning support mechanism includes: The bracket (3) has a first side surface as a bearing base surface and a second side of the bracket (3) is provided with a first connector (4), which is used to detachably connect with the mounting base (2). A positioning block (5) is disposed on the first side of the bracket (3). The positioning block (5) has a positioning reference surface, which is used to abut against the target component. A ranging element (6) is disposed on the positioning block (5), and the ranging element (6) is used at least to detect the distance between the positioning reference surface and the measurement reference.

3. The assembly fixture for mounting components on a vehicle chassis according to claim 2, characterized in that, Along the longitudinal direction of the vehicle chassis, the size of the bearing base is larger than the size of the target component.

4. The assembly fixture for mounting components on a vehicle chassis according to claim 3, characterized in that, The opposite ends of the bracket (3) are bent toward the second side of the bracket (3) to form a pair of bending ribs. The axis of the bending ribs is parallel to the longitudinal direction of the vehicle body frame, and the pair of bending ribs are distributed laterally along the vehicle body frame.

5. The assembly fixture for mounting components on a vehicle chassis according to claim 1, characterized in that, The socketing mechanism includes: The first plate, the second plate, and the third plate are fixedly connected in sequence. The first plate and the third plate are parallel to each other and spaced apart. The second plate is disposed between the first plate and the third plate. A through groove is formed between the first plate and the third plate for the target beam (1) to pass through. A second connector (8) is provided on the side of the first plate away from the third plate. The second connector (8) is used to detachably connect with the mounting base (2).

6. The assembly fixture for mounting components on a vehicle chassis according to claim 5, characterized in that, The socketing mechanism further includes: The limiting rod (9) has limiting holes on the first plate and the third plate, and the target beam (1) has a through hole through which the limiting rod (9) passes. The limiting rod (9) passes through the limiting hole and the through hole of the target beam (1). Fastening assembly for detachably fixing the limiting rod (9) to the first plate and the third plate.

7. The assembly fixture for mounting components on a vehicle chassis according to claim 5, characterized in that, The socketing mechanism further includes: A clamping member (10) is disposed in at least one of the first plate and the third plate, the clamping member (10) being used to clamp against the target beam (1) along the distribution direction of the first plate and the third plate.

8. The assembly fixture for mounting components on a vehicle body underframe according to any one of claims 1-7, characterized in that, The drive mechanism includes: The longitudinal drive assembly is located on the foundation ground below the vehicle body chassis; A lateral drive assembly is disposed at the output end of the longitudinal drive assembly, and the longitudinal drive assembly is used to drive the lateral drive assembly to move longitudinally along the chassis of the vehicle body. A vertical drive assembly is disposed at the output end of the lateral drive assembly. The lateral drive assembly is used to drive the vertical drive assembly to move laterally along the vehicle body frame. The mounting base (2) is disposed at the output end of the vertical drive assembly. The vertical drive assembly is used to drive the mounting base (2) to move vertically along the vehicle body frame.

9. The assembly tool for a vehicle body frame mounting member according to claim 8, characterized by, The longitudinal drive assembly includes at least two longitudinal drive rails (11), each of which is mounted on the base surface via an adjustable foot, which is used to adjust the distance between the longitudinal drive rail (11) and the base surface.

10. The assembly tool for a vehicle body frame mounting member according to claim 8, characterized by The vertical drive assembly includes a hydraulic cylinder (13), and a displacement detection element is provided inside the hydraulic cylinder (13) for detecting the displacement of the piston rod of the hydraulic cylinder (13).

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