Automobile four-wheel positioning rear slide plate

Abstract

This invention discloses a rear wheel alignment sliding plate for automobiles, comprising a wheel support plate, a connecting plate, and a base support plate arranged sequentially. The wheel support plate supports the rear wheels of the vehicle and is rotatably mounted on the connecting plate via a rotating support unit. The connecting plate is equipped with a rotation angle limiting unit to restrict the rotation angle of the wheel support plate, ensuring that the rotation angle meets the requirements of four-wheel alignment testing. The connecting plate is slidably mounted on the base support plate via a longitudinal displacement guiding unit, and under the limiting action of a lateral limiting unit, lateral displacement of the connecting plate is prevented. The connecting plate is then guided by the longitudinal displacement guiding unit to move longitudinally on the base support plate. The rear wheel alignment sliding plate of this invention has high load-bearing capacity and high rigidity, with uniform stress distribution, capable of withstanding the high loads and impacts of heavy military vehicles, and meeting the requirements for rotation angle and inertial impact translation of wheels in military vehicles and non-standard vehicles.

Description

Technical Field

[0001] The embodiments of the present invention belong to the technical field of vehicle four-wheel alignment detection devices, and more specifically, relate to a sliding plate after vehicle four-wheel alignment. Background Technology

[0002] Four-wheel alignment is an important process that must be inspected and adjusted before a vehicle leaves the factory. Proper adjustment of four-wheel alignment parameters (toe-in, camber, caster, kingpin inclination, etc.) can ensure the vehicle's handling stability and safety, and reduce wear on tires and related components.

[0003] During rear wheel testing, the rear wheels rest on the positioning plate, allowing the wheels to rotate and slide freely, putting the suspension in a free state, releasing stress, and avoiding errors in four-wheel alignment testing.

[0004] However, conventional four-wheel alignment systems (such as Bestbart four-wheel alignment systems) have a relatively simple structure in their alignment plates, with a maximum load capacity of only 1000kg, poor rigidity, small rotation angle, and small inertial impact translation, making them unsuitable for use on military vehicles with high loads and impacts, reaching full loads of up to 5t. Therefore, there is an urgent need to design and manufacture an alignment plate suitable for military vehicles with high loads and high-intensity operation. Summary of the Invention

[0005] Addressing the limitations of existing wheel alignment systems, such as low load capacity, poor rigidity, small rotation angle, and minimal inertial impact translation, which prevent their application in high-load, high-impact military and other non-standard vehicles for four-wheel alignment testing, this invention provides a wheel alignment system for automobiles. This system enhances axial support and strength by incorporating a rotation support unit, mitigates axial impact by using a needle roller bearing assembly, and increases structural strength to withstand the impacts of heavy-load vehicles. Furthermore, it maintains structural strength and prevents deformation during high-intensity testing. The system also adjusts the rotation angle and displacement distance using a rotation angle limiting unit and a longitudinal displacement guiding unit, thus meeting the rotation angle and inertial impact translation requirements of both military and non-standard vehicle wheels.

[0006] To achieve the above objectives, the present invention provides a sliding plate for a four-wheel alignment of an automobile, comprising: a base support plate, the top of which is symmetrically provided with sliding components along the longitudinal direction, the sliding components including a needle roller bearing assembly; a connecting plate slidably disposed on the top of the base support plate, the top of which is provided with a support bushing, and a rotating bushing passing through the center; a lateral limiting unit for fastening and connecting the connecting plate and the base support plate, including L-shaped limiting blocks symmetrically disposed on both sides of the connecting plate; a wheel support plate rotatably disposed on the top of the connecting plate, the bottom of which is also provided with a rotating shaft at the center; and a rotating support unit for realizing the rotation function of the wheel support plate, including: a wheel support... A planar bearing for axial support of the support plate is sleeved on the support bushing, with its top fixedly connected to the wheel support plate and its bottom fixedly connected to the connecting plate; a thrust bearing for radial support of the wheel support plate has its outer ring fixedly installed inside the rotating bushing, and its inner ring fitted onto the bottom shaft of the rotating shaft with an interference fit; a rotation angle limiting unit for limiting the rotation angle of the wheel support plate; and a longitudinal displacement guiding unit for limiting the displacement distance of the wheel support plate, including support limiting baffles, which are symmetrically arranged at the front and rear ends of the base support plate to block the L-shaped limiting blocks, thereby limiting the displacement distance of the wheel support plate.

[0007] Furthermore, the longitudinal displacement guiding unit also includes a guide rod bracket and a guide rod, wherein: one end of the guide rod bracket is fixedly disposed at the middle of the outer side of the connecting plate, and a reset baffle is provided thereon; the reset baffle is provided with a guide hole through it, and the diameter of the guide hole is the same as the outer diameter of the guide rod; the guide rod passes through the guide hole, and its two ends are fixedly disposed on the L-shaped limiting block; the guide rod bracket slides on the guide rod through the guide hole provided in the reset baffle, so that the connecting plate maintains linear displacement along the longitudinal direction.

[0008] Furthermore, the guide rod is also provided with a reset spring on the rod body located on both sides of the reset baffle.

[0009] Furthermore, the lateral limiting unit also includes a stepped portion fixedly disposed on both sides of the base support plate, the outer side of which is in contact with the inner side of the vertical block of the L-shaped limiting block, and the bottom of which is in contact with the top of the horizontal block of the L-shaped limiting block.

[0010] Furthermore, the rotating bushing is disposed through the center of the connecting plate. It has a cylindrical structure, with the opening of the cylinder flush with the bottom of the connecting plate. The inner wall is fixedly connected to the outer ring of the thrust bearing, and a rotating hole is opened at the bottom of the cylinder. The diameter of the rotating hole is larger than the diameter of the inner ring of the thrust bearing.

[0011] Furthermore, the rotating shaft includes a first stepped shaft and a second stepped shaft arranged sequentially, wherein: the diameter of the first stepped shaft is larger than the diameter of the second stepped shaft; the size of the second stepped shaft is adapted to the inner ring of the thrust bearing, and the inner ring of the thrust bearing is fixedly sleeved on the second stepped shaft by interference fit.

[0012] Furthermore, the central axes of the rotating shaft, the support bushing, the rotating bushing, the plane bearing, and the thrust bearing coincide in the vertical direction.

[0013] Furthermore, the rotation angle limiting unit includes a rotation limiting plate fixedly disposed at the bottom of the wheel support plate, and forward rotation angle limiting components and reverse rotation angle limiting components symmetrically disposed on both sides of the rotation limiting plate. The forward rotation angle limiting components have the same structure as the reverse rotation angle limiting components, including: a first limiting bracket and a second limiting bracket fixedly disposed at the top of the connecting plate, with a first limiting baffle and a second limiting baffle respectively disposed on the brackets; a first limiting rod that passes through and slides on the first limiting baffle and the second limiting baffle, one end of which abuts against the rotation limiting plate in sequence, and a first limiting ring and a second limiting ring respectively disposed on the rod body located on both sides of the first limiting baffle; and a return spring sleeved on the first limiting rod, with both sides abutting against the second limiting ring and the second limiting baffle respectively.

[0014] Furthermore, the wheel support plate is a cover plate structure with reinforcing ribs spaced apart at the bottom and a reinforcing frame around the outer perimeter.

[0015] Furthermore, the rotation angle range of the wheel support plate is 0 to ±10°, and the longitudinal displacement distance is 0 to ±100 mm.

[0016] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0017] (1) The rear sliding plate for four-wheel alignment of automobiles of the present invention increases the structural strength of the wheel support plate by providing reinforcing ribs and reinforcing frame; increases the support area during rotation by using plane bearings to provide axial support for the wheel support plate, and provides radial support for the wheel support plate by using thrust bearings, thereby achieving high load capacity and high rigidity in a limited space; and allows the load on the connecting plate to be evenly distributed on the two rows of needle roller bearings by using needle roller bearing assemblies for sliding connection with the bottom of the connecting plate, thereby improving the structural strength and reducing axial impact force. In summary, the rear sliding plate of the present invention, by strengthening the overall structure, separates the sliding and rotation functions, and uses various bearings to equalize the load, thereby improving the overall strength, rigidity and load-bearing capacity of the equipment, which can meet the impact of heavy-load vehicles, and maintain the structural strength without deformation in high-intensity testing work, and has a long overall service life.

[0018] (2) The present invention provides a car four-wheel alignment rear plate, which uses a first L-shaped limiting block, a second L-shaped limiting block, a third L-shaped limiting block and a fourth L-shaped limiting block to fasten the connecting plate 2 to the base support plate, effectively limiting lateral displacement. Furthermore, the connecting plate is guided by a guiding component to maintain a straight longitudinal displacement, thereby improving the detection accuracy during four-wheel alignment.

[0019] (3) The rear sliding plate of the four-wheel alignment of the present invention increases the support area during rotation by means of a plane bearing, which can withstand the high impact force brought by the large load on the wheel support plate, while reducing the overall pressure on the rotating support unit, making the rotation operation smoother, avoiding excessive pressure leading to bearing damage, and extending the working life of the rotating support unit.

[0020] (4) The present invention provides a four-wheel alignment rear sliding plate for automobiles, which limits the rotation angle of the wheel support plate to within ±10° by means of a rotation angle limiting unit; and limits the wheel support plate to a maximum longitudinal displacement distance of ±100 mm by means of a guide component; thus meeting the requirements of rotation angle and inertial impact translation of wheels for military vehicles and non-standard vehicles.

[0021] (5) The present invention provides a car four-wheel alignment rear sliding plate. The L-shaped limiting block can limit the connecting plate laterally and fasten the connecting plate and the base support plate to prevent them from separating. At the same time, it can cooperate with the support limiting baffle to limit the longitudinal displacement of the connecting plate. The L-shaped limiting block can realize multiple functions, simplify the functional component requirements of the overall device in a limited space, make the overall structure simple and compact, reduce production costs, and facilitate the later maintenance work.

[0022] (6) The present invention provides a car four-wheel alignment rear slide plate. After the wheel support plate completes the sliding and rotating work, it can realize the automatic return function by means of the reset spring provided on the longitudinal displacement guide unit and the rotation angle limiting unit. It does not require manual reset and improves the detection efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a sliding plate after four-wheel alignment of an automobile in an embodiment of the present invention;

[0024] Figure 2 This is a bottom view of a sliding plate after four-wheel alignment of an automobile, according to an embodiment of the present invention.

[0025] Figure 3 This is a bottom view of the wheel support plate in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the connecting plate in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the rotating support unit in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the rotation angle limiting unit in an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the lateral limiting unit in an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the displacement guiding unit in an embodiment of the present invention.

[0031] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0032] 1-Wheel support plate, including: 101-Reinforcing rib, 102-Reinforcing frame

[0033] 2-Connecting plate;

[0034] 3-Base support plate, including: 31-Needle roller bearing mounting groove;

[0035] 4-Longitudinal displacement guide unit, including: 41-guide rod bracket, 411-reset baffle, 42-guide rod, 43-needle roller bearing assembly, 44-support limit baffle;

[0036] 5-Rotational support unit, including: 51-Rotational shaft, 511-First step shaft, 512-Second step shaft, 52-Support shaft sleeve, 53-Rotational shaft sleeve, 531-Rotational hole, 54-Planar bearing, 55-Thrust bearing;

[0037] 6- Lateral limiting unit, including: 61-Step portion, 62-First L-shaped limiting block, 63-Second L-shaped limiting block, 64-Third L-shaped limiting block, 65-Fourth L-shaped limiting block;

[0038] 7- Rotation angle limiting unit, including: 71- Rotation limiting plate, 72- Forward rotation angle limiting component, 721- First limiting rod, 7211- First limiting ring, 7212- Second limiting ring, 722- First limiting bracket, 7221- First limiting baffle, 723- Second limiting bracket, 7231- Second limiting baffle, 73- Reverse rotation angle limiting component, 731- Second limiting rod, 732- Third limiting bracket, 733- Fourth limiting bracket. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0040] like Figure 1-8 As shown, this invention discloses a rear alignment plate for automobiles, fixedly installed in an installation pit with its top flush with the ground. When the rear wheels of a vehicle travel to its top, it can be used in conjunction with a four-wheel alignment tester to perform alignment tests on the rear wheels. It includes a wheel support plate 1, a connecting plate 2, and a base support plate 3 arranged sequentially. The wheel support plate 1 supports the rear wheels of the vehicle and is rotatably mounted on the connecting plate 2 via a rotating support unit 5. The connecting plate 2 is equipped with a rotation angle limiting unit 7, which limits the rotation angle of the wheel support plate 1 to meet the requirements of four-wheel alignment testing. The connecting plate 2 is slidably mounted on the base support plate 3 via a longitudinal displacement guide unit 4, and under the limiting action of a lateral limiting unit 6, lateral displacement of the connecting plate 2 is prevented, allowing the connecting plate 2 to move longitudinally on the base support plate 3 under the guidance of the longitudinal displacement guide unit 4. The rear alignment plate of this invention has high load-bearing capacity and high rigidity, with uniform stress distribution, and can withstand the high loads and high impacts brought by heavy military vehicles.

[0041] like Figure 3 As shown, the wheel support plate 1 is a cover plate structure with reinforcing ribs 101 spaced apart at its bottom and a reinforcing frame 102 around its outer perimeter. The reinforcing ribs 101 and the reinforcing frame 102 increase the structural strength of the wheel support plate 1, preventing deformation under high loads and impacts that could affect testing accuracy and improving the service life of the wheel support plate 1. A rotating shaft 51 is fixedly installed at the center of the bottom of the wheel support plate 1 to provide axial support. This shaft includes a first stepped shaft 511 and a second stepped shaft 512 arranged sequentially. The diameter of the first stepped shaft 511 is larger than the diameter of the second stepped shaft 512. The central axes of the first stepped shaft 511, the second stepped shaft 512, and the wheel support plate 1 coincide.

[0042] like Figure 4-5As shown, the rotating support unit 5 enables the wheel support plate 1 and the connecting plate 2 to be rotatably connected. It includes a rotating shaft 51, a support bushing 52, a rotating bushing 53, a plane bearing 54, and a thrust bearing 55. The support bushing 52 is an annular structure and is fixedly mounted on the top of the connecting plate 2. The rotating bushing 53 is a cylindrical structure that passes through the center of the connecting plate 2. The opening of the cylinder is flush with the bottom of the connecting plate 2, and a rotating hole 531 is opened at the bottom of the cylinder. The central axes of the connecting plate 2, the support bushing 52, and the rotating bushing 53 coincide in the vertical direction. The dimensions of the planar bearing 54 are adapted to those of the support bushing 52, and it is fitted onto the support bushing 52. Its bottom ring is fixedly connected to the top of the connecting plate 2, and its top ring is fixedly connected to the wheel support plate 1. The planar bearing 54 increases the support area during rotation, which can withstand the high impact force brought by the large load on the wheel support plate 1. At the same time, it reduces the overall pressure on the rotating support unit 5, making the rotation operation smoother, avoiding excessive pressure that could damage the bearing, and extending the service life of the rotating support unit 5. The thrust bearing 55 is located at the bottom of the rotating bushing 53, and its outer ring is fixedly connected to the inner wall of the rotating bushing 53. Its inner ring diameter is smaller than the rotating hole 531, allowing it to rotate. The second stepped shaft 512 is adapted to the inner ring of the thrust bearing 55. Through an interference fit, the inner ring of the thrust bearing 55 is fixedly sleeved on the second stepped shaft 512. Pushing the wheel support plate 1 in the horizontal direction, the wheel support plate 1 can rotate horizontally around the rotating shaft 51 with the assistance of the plane bearing 54, thus achieving accurate measurement of four-wheel alignment.

[0043] To prevent the wheel support plate 1 from colliding with the installation pit during rotation, and considering the maximum rotation angle of the rear wheels of military vehicles and non-standard vehicles, the positioning rear sliding plate of this embodiment of the invention limits the rotation angle of the wheel support plate 1 by means of a rotation angle limiting unit 7. The rotation angle limiting unit 7 includes a rotation limiting plate 71, and forward rotation angle limiting components 72 and reverse rotation angle limiting components 73 that respectively abut against both sides of the rotation limiting plate 71. The rotation limiting plate 71 is fixedly installed at the bottom of the wheel support plate 1, and when it rotates with the wheel support plate 1, it is limited by the forward rotation angle limiting components 72 and reverse rotation angle limiting components 73, thereby controlling the rotation angle of the wheel support plate 1. The forward rotation angle limiting components 72 and reverse rotation angle limiting components 73 have identical structures and are symmetrically arranged on the top of the connecting plate 2.

[0044] The forward rotation angle limiting component 72 includes a first limiting rod 721, a first limiting support 722, and a second limiting bracket 723. The first limiting bracket 722 and the second limiting bracket 723 are fixedly mounted on the top of the connecting plate 2, and the first limiting rod 721 is slidably limited on the first limiting support 722 and the second limiting bracket 723. The first limiting support 722 is provided with a first limiting baffle 7221, and the second limiting bracket 723 is provided with a second limiting baffle 7231; the first limiting baffle 7221 and the second limiting baffle 7231 are respectively provided with sliding holes, the diameter of the sliding holes is adapted to the diameter of the first limiting rod 721, and the first limiting rod 721 can slide within the sliding holes; the first limiting rod 721 is fixedly provided with a first limiting ring 7211 and a second limiting ring 7212, the first limiting ring 7211 and the second limiting ring 7212 are respectively located on both sides of the first limiting baffle 7221, and the distance between them can be adjusted according to the limit angle value of the rear wheel rotation of the vehicle. When the wheel support plate 1 rotates forward, the rotation limit plate 71 pushes the first limit rod 721 to move, and the first limit ring 7211 moves closer to the first limit baffle 7221. When the wheel support plate 1 rotates to the maximum set angle, the first limit ring 7211 abuts against the first limit baffle 7221, forcing the wheel support plate 1 to stop rotating and preventing it from colliding with the installation pit. A return spring is also fitted on the first limit rod 721 located between the second limit ring 7212 and the second limit baffle 7231, with its two sides abutting against the second limit ring 7212 and the second limit baffle 7231 respectively. After the rear wheels of the vehicle are removed, the return spring pushes the second limit ring 7212 to move until it abuts against the first baffle 7221, causing the first limit rod 721 to push the rotation limit plate 71 back to its original position, thereby resetting the wheel support plate 1 without requiring manual adjustment by inspection personnel.

[0045] The reversal angle limiting component 73 includes a second limiting rod 731, a third limiting bracket 732 and a fourth limiting bracket 733, which limits the reversal angle when the wheel support plate 1 rotates, and drives the wheel support plate 1 to return to its original position after the four-wheel alignment process is completed.

[0046] The reverse angle limiting component 7 of the present invention limits the rotation angle of the wheel support plate 1, so that the rotation angle of the wheel support plate 1 is limited to within ±10°. Compared with the original positioning plate's ±2.5° rotation angle limitation, it meets the rotation amount required for four-wheel alignment of military vehicles and non-standard vehicles.

[0047] The connecting plate 2 is slidably mounted on the base support plate 3. To prevent it from detaching from the base support plate 3 during sliding, and to avoid lateral displacement causing the connecting plate 2 to collide with the installation pit, a lateral limiting unit 6 is provided between the connecting plate 2 and the base support plate 3 to solve these problems. Figure 7As shown, the lateral limiting unit 6 includes a stepped portion 61 and an L-shaped limiting block. The L-shaped limiting block includes a first L-shaped limiting block 62, a second L-shaped limiting block 63, a third L-shaped limiting block 64, and a fourth L-shaped limiting block 65. The stepped portion 61 is symmetrically fixed to the side of the base support plate 3; the first L-shaped limiting block 62 and the second L-shaped limiting block 63 have the same structure and are symmetrically fixed to the side of the connecting plate 2, wherein the vertical block of the first L-shaped limiting block 62 is fixed to one side of the connecting plate 2 by bolts, and the inner side of the vertical block is in contact with the outer side of the stepped portion 61; the top of the horizontal block of the first L-shaped limiting block 62 is in contact with the bottom of the stepped portion 61. The third L-shaped limiting block 64 and the fourth L-shaped limiting block 65 have the same structure and are symmetrically fixed on the other side of the connecting plate 2. The vertical block of the third L-shaped limiting block 64 is fixed to the side of the connecting plate by bolts, and its inner side is in contact with the outer side of the step portion 61; the top of the horizontal block of the third L-shaped limiting block 64 is in contact with the bottom of the step portion 61.

[0048] The inner sides of the vertical blocks on the first L-shaped limiting block 62, the second L-shaped limiting block 63, the third L-shaped limiting block 64, and the fourth L-shaped limiting block 65 are respectively attached to the outer side of the step portion 61, restricting the lateral displacement of the connecting plate 2 on the base support plate 3, so that it can only slide longitudinally on the base support plate 3. The vertical blocks on the first L-shaped limiting block 62, the second L-shaped limiting block 63, the third L-shaped limiting block 64, and the fourth L-shaped limiting block 65 are respectively fixedly connected to both sides of the connecting plate 2, and the top of the horizontal block is attached to the bottom of the step portion 61, restricting the vertical displacement of the connecting plate 2 and preventing the connecting plate 2 from detaching from the base support plate 3 when sliding. The lateral limiting unit 6 restricts the lateral and vertical displacement of the connecting plate 2 when sliding, so that the connecting plate 2 can only slide longitudinally on the base support plate 3, avoiding the displacement caused by the connection being weak and subjected to lateral impact force, which would cause angular deviation of the vehicle's rear wheels and result in large positioning accuracy errors.

[0049] Since the connecting plate 2 needs to slide on the base support plate 3 to reduce impact force, a certain gap is required between the first L-shaped limiting block 62, the second L-shaped limiting block 63, the third L-shaped limiting block 64, and the fourth L-shaped limiting block 65 and the step portion 61 to allow the connecting plate 2 to slide. To avoid the gap affecting the positioning accuracy, the positioning slide plate of the present invention is equipped with a longitudinal displacement guiding unit 4 to improve the accuracy of the connecting plate 2 during displacement. The longitudinal displacement guiding unit 4 guides the longitudinal displacement of the connecting plate 2 by means of a guiding component, and reduces friction by means of a sliding component, making the sliding operation more effortless.

[0050] like Figure 8As shown, the guide assembly has two sets, located on both sides of the base support plate 3, guiding the longitudinal displacement of the connecting plate 2. It includes a guide rod bracket 41, a guide rod 42, and a support limiting baffle 44. The middle end of the guide rod 42 passes through the guide rod bracket 41, and its two ends are fixed to the support limiting baffle 44. One end of the guide rod bracket 41 is fixed to the middle of the outer side of the connecting plate 2 by bolts, and a reset baffle 411 is provided on it. The reset baffle 411 has a through guide hole with the same diameter as the outer diameter of the guide rod 42, which can radially limit the guide rod 42 and prevent radial displacement when the guide rod bracket 41 slides on the guide rod 42. The support limiting baffle 44 has four sets, symmetrically arranged in pairs at the front and rear ends of the base support plate 3. The support limiting baffle 44 also has an assembly hole that matches the end of the guide rod 42. After the end of the guide rod 42 is assembled into the assembly hole, the axial displacement of the guide rod 42 is restricted. The guide rod 42 is equipped with a return spring on both sides of the return baffle 411. After the four-wheel alignment test is completed, the return baffle 411 can be pushed back to the middle of the guide rod 42 with the assistance of the return spring, so that the connecting plate 2 drives the wheel support plate 1 to return to its original position. When assembling the guide assembly, the guide rod bracket 41 can be fixed to the middle of the side of the connecting plate 2 with bolts. The guide rod 42 passes through the guide hole on the return baffle 411, and its two ends are respectively inserted into the assembly holes on the support limiting baffle 44. Finally, the support limiting baffle 44 is fixed to the front and rear ends of the base support plate 3 with bolts to complete the assembly work.

[0051] When the guide assembly performs its guiding function, the connecting plate 2 slides longitudinally on the base support plate 3, and the guide rod bracket 41 slides on the guide rod 42 through the guide hole provided in the reset baffle 411. The guide hole cooperates with the guide rod 42 to limit the offset direction of the guide rod bracket 41, thereby preventing deviation when the connecting plate 2 is axially displaced, thus improving the accuracy of four-wheel positioning detection. To prevent the connecting plate 2 from sliding out of the base support plate 3 and colliding with the installation pit during longitudinal displacement, the support limiting baffle 44 cooperates with the first L-shaped limiting block 62, the second L-shaped limiting block 63, the third L-shaped limiting block 64, and the fourth L-shaped limiting block 65 to limit the axial displacement of the connecting plate 2. The side of the connecting plate 2 can be provided with fixed holes to change the installation and fixing positions of the first L-shaped limiting block 62, the second L-shaped limiting block 63, the third L-shaped limiting block 64, and the fourth L-shaped limiting block 65, thereby limiting the longitudinal displacement distance of the connecting plate 2. The fixed holes provided on the side of the connecting plate 2 can be arranged according to the vehicle load and the impact force on the wheel support plate 1. After the guide component limits the displacement, the maximum longitudinal displacement distance of the wheel support plate 1 is ±100 mm, which is greater than the displacement distance of a normal positioning slide plate (±70 mm), and can meet the translational displacement requirements caused by the inertial impact of heavy vehicles.

[0052] The sliding assembly includes needle roller bearing assemblies 43 that are symmetrically and longitudinally slidably disposed on the base support plate 3. By providing two sets of needle roller bearing mounting grooves 31 symmetrically along the longitudinal direction on the top of the base support plate 3, the needle roller bearing assemblies 43 are mounted in the needle roller bearing mounting grooves 31, making the needle roller bearing assemblies 43 slidably connected to the bottom of the connecting plate 2. This allows the load on the connecting plate 2 to be evenly distributed on the two rows of needle roller bearing assemblies 43, improving structural strength, reducing axial impact force, and preventing the base support plate 3 from deforming due to uneven pressure caused by the dynamic load from long-term vehicle inspection.

[0053] The needle roller bearing assembly 43 adopts the IKO FT4043 series model, with a single bearing rated load of up to 127,000 N, which can fully meet the weight of the whole vehicle of 5t or the impact weight of 12.7t.

[0054] The positioning rear slide plate of the present invention increases the structural strength of the wheel support plate 1 by providing reinforcing ribs 101 and reinforcing frame 102; it increases the support area during rotation by using plane bearings 54 to provide axial support for the wheel support plate 1, and provides radial support for the wheel support plate 1 by using thrust bearings 55, thus achieving high load capacity and high rigidity within a limited space; the needle roller bearing assembly 43 is slidably connected to the bottom of the connecting plate 2, so that the load on the connecting plate 2 can be evenly distributed on the two rows of needle roller bearing assemblies 43, improving structural strength and reducing axial impact force; in summary, the positioning rear slide plate of the present invention, by strengthening the overall structure, separates the sliding and rotation functions, and uses various bearings to even out the load, thereby improving the overall strength, rigidity, and load-bearing capacity of the equipment, which can meet the impact of heavy-load vehicles, maintain structural strength without deformation during high-intensity testing work, and has a long overall service life.

[0055] The positioning slide plate of the present invention uses a first L-shaped limiting block 62, a second L-shaped limiting block 63, a third L-shaped limiting block 64 and a fourth L-shaped limiting block 65 to fasten the connecting plate 2 onto the base support plate 3, effectively limiting lateral displacement. Furthermore, it is guided by a guiding component to keep the connecting plate 2 moving in a straight line along the longitudinal direction, thereby improving the detection accuracy during four-wheel alignment.

[0056] The positioning slide plate of the present invention, wherein the L-shaped limiting block not only limits the connecting plate 2 laterally and fastens the connecting plate 2 and the base support plate 3 to prevent them from separating, but also works with the support limiting baffle 44 to limit the longitudinal displacement of the connecting plate 2; the L-shaped limiting block can realize multiple functions, simplify the functional component requirements of the overall device in a limited space, make the overall structure simple and compact, reduce production costs, and also facilitate the later maintenance work.

[0057] The positioning rear slide plate of the present invention limits the rotation angle of the wheel support plate 1 to within ±10° by means of the rotation angle limiting unit 7; and limits the maximum longitudinal displacement of the wheel support plate 1 to ±100 mm by means of the guide component; thus meeting the requirements of rotation angle and inertial impact translation of wheels of military vehicles and non-standard vehicles.

[0058] The positioning slide plate of the present invention can automatically return to its original position after the wheel support plate 1 has completed the sliding and rotating work, by means of the reset spring provided on the longitudinal displacement guide unit 4 and the rotation angle limiting unit 7, without the need for manual reset, thus improving the detection efficiency.

[0059] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sliding plate for four-wheel alignment of a car, characterized in that, include: The base support plate (3) has a sliding assembly symmetrically arranged on its top along the longitudinal direction, the sliding assembly including a needle roller bearing assembly (43). A connecting plate (2) is slidably mounted on the top of the base support plate (3), with a support bushing (52) on its top and a rotating bushing (53) passing through its center; the rotating bushing (53) is a cylindrical structure, with its opening flush with the bottom of the connecting plate (2), its inner wall fixedly connected to the outer ring of the thrust bearing (55), and a rotating hole (531) at the bottom of the cylinder, the diameter of which is larger than the inner ring diameter of the thrust bearing (55); The transverse limiting unit (6) that fastens the connecting plate (2) and the base support plate (3) includes two L-shaped limiting blocks symmetrically arranged on both sides of the connecting plate (2) and a step portion (61) fixedly arranged on both sides of the base support plate (3); the outer side of the step portion (61) is attached to the inner side of the vertical block of the L-shaped limiting block, and its bottom is attached to the top of the horizontal block of the L-shaped limiting block; Rotate the wheel support plate (1) located on the top of the connecting plate (2), and a rotating shaft (51) is also provided at the center of its bottom. The rotating support unit (5) that realizes the rotation function of the wheel support plate (1) includes: a plane bearing (54) that provides axial support for the wheel support plate (1), which is sleeved on the support bushing (52), with its top fixedly connected to the wheel support plate (1) and its bottom fixedly connected to the connecting plate (2); and a thrust bearing (55) that provides radial support for the wheel support plate (1), with its outer ring fixedly installed in the rotating bushing (53) and its inner ring sleeved on the rotating shaft (51) by interference fit. Rotation angle limiting unit (7) that limits the rotation angle of the wheel support plate (1). And a longitudinal displacement guide unit (4) that limits the displacement distance of the wheel support plate (1), including a support limiting baffle (44), which is symmetrically arranged at the front and rear ends of the base support plate (3) to block the L-shaped limiting block, thereby limiting the displacement distance of the wheel support plate (1).

2. The sliding plate for four-wheel alignment of an automobile according to claim 1, characterized in that, The longitudinal displacement guiding unit (4) further includes a guide rod bracket (41) and a guide rod (42), wherein: One end of the guide rod bracket (41) is fixed at the middle of the outer side of the connecting plate (2), and a reset baffle (411) is provided on it. The reset baffle (411) is provided with a guide hole, and the diameter of the guide hole is the same as the outer diameter of the guide rod (42). The guide rod (42) passes through the guide hole and its two ends are fixed on the L-shaped limiting block; The guide rod bracket (41) slides on the guide rod (42) through the guide hole provided in the reset baffle (411), so that the connecting plate (2) maintains a linear displacement in the longitudinal direction.

3. A sliding plate for four-wheel alignment of an automobile according to claim 2, characterized in that, The guide rod (42) located on both sides of the reset baffle (411) is also provided with a reset spring.

4. A sliding plate for four-wheel alignment of an automobile according to any one of claims 1-3, characterized in that, The rotating shaft (51) includes a first stepped shaft (511) and a second stepped shaft (512) arranged sequentially, wherein: The diameter of the first step shaft (511) is larger than the diameter of the second step shaft (512); The dimensions of the second stepped shaft (512) are adapted to the inner ring of the thrust bearing (55). Through interference fit, the inner ring of the thrust bearing (55) is fixedly sleeved on the second stepped shaft (512).

5. A sliding plate for four-wheel alignment of an automobile according to any one of claims 1-3, characterized in that, The rotating shaft (51), the support bushing (52), the rotating bushing (53), the plane bearing (54), and the thrust bearing (55) coincide in the central axis in the vertical direction.

6. A sliding plate for four-wheel alignment of an automobile according to any one of claims 1-3, characterized in that, The rotation angle limiting unit (7) includes a rotation limiting plate (71) fixedly disposed at the bottom of the wheel support plate (1), a forward rotation angle limiting component (72) and a reverse rotation angle limiting component (73) symmetrically disposed on both sides of the rotation limiting plate (71). The forward rotation angle limiting component (72) and the reverse rotation angle limiting component (73) have the same structure, including: A first limiting bracket (722) and a second limiting bracket (723) are fixedly installed on the top of the connecting plate (2), and a first limiting baffle (7221) and a second limiting baffle (7231) are respectively provided on the two. A first limiting rod (721) is provided through and slidably disposed on the first limiting baffle (7221) and the second limiting baffle (7231), one end of which abuts against the rotating limiting plate (71) in sequence, and a first limiting ring (7211) and a second limiting ring (7212) are respectively provided on the rod body located on both sides of the first limiting baffle (7221). The return spring sleeved on the first limiting rod (721) has its two ends in contact with the second limiting ring (7212) and the second limiting baffle (7231), respectively.

7. A sliding plate for four-wheel alignment of an automobile according to any one of claims 1-3, characterized in that, The wheel support plate (1) is a cover plate structure, with reinforcing ribs (101) spaced apart at the bottom and a reinforcing frame (102) on the outer periphery.

8. A sliding plate for four-wheel alignment of an automobile according to any one of claims 1-3, characterized in that, The wheel support plate (1) has a rotation angle range of 0 to ±10° and a longitudinal displacement distance of 0 to ±100 mm.

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