Independent suspension assembly and its KC test method

Abstract

An independent suspension assembly and a KC test method thereof are used for KC test of independent suspension assembly. The independent suspension assembly is positioned by a frame assembly test device, and the tie rod assembly is adjusted to ensure that the toe value is consistent with the state of the whole vehicle; the spring energy storage air chamber is manually adjusted to perform brake lock; the bottom of the wheel disc is connected to a six-degree-of-freedom parallel structure platform to achieve multi-directional loading and six-component force measurement of the tire grounding point, and the KC test bench system measures and collects four-wheel alignment parameters, wheelbase, and wheel hop data. The present invention uses an improved frame assembly test device to test and position the independent suspension assembly, which can achieve accurate measurement of its KC characteristic test, facilitate comparison of simulation results with test data and improved design, form independent suspension forward development capabilities, ensure that the four-wheel alignment parameters of the independent suspension assembly are consistent with the state of the whole vehicle, and compared with the use of the whole vehicle for testing, the structure is simpler, the tooling is more reliable, the cost is lower, and the test space is small.

Description

Technical Field

[0001] The invention relates to the technical field of automobile chassis, in particular to an independent suspension assembly and a KC test method thereof. Background Art

[0002] In order to adapt to extra-large, large high-grade 2, high-grade 3, and medium-sized high-grade 2 buses, the front suspension generally adopts an independent suspension assembly, which can not only meet the good handling stability of the vehicle, but also ensure sufficient comfort. At present, domestic suspension suppliers mainly develop independent suspension assemblies for buses by measuring the hard point data of corresponding products of imported manufacturers and conducting reverse design. The suspension KC characteristics, as the most important design indicator of the independent suspension assembly, are usually simulated using software, but there is a lack of KC test methods for independent suspension assemblies for buses, and there is no KC bench verification, so the accuracy of the KC simulation results cannot be evaluated. Therefore, it is difficult to form a complete independent suspension assembly forward design and development capability. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide an independent suspension assembly and a KC test method thereof, so as to achieve accurate measurement of the KC characteristic test of the independent suspension assembly.

[0004] To achieve the above-mentioned purpose of the invention, the independent suspension assembly of the present invention is positioned by means of a frame assembly test device, the upper cross arm assembly and the lower cross arm assembly are mounted on the interface 1 M1 of the front frame of the frame assembly test device, the air spring assembly is mounted on the interface 2 M2 of the front frame of the frame assembly test device, and the shock absorber assembly is mounted on the interface 3 M3 of the front frame of the frame assembly test device, so as to ensure that the positioning parameters of the independent suspension assembly are consistent with those of the whole vehicle; the front suspension assembly and the rear suspension assembly of the frame assembly test device are respectively mounted on the front fixed support and the rear fixed support The seat is pressed and fixed to the iron floor. The pressing device can be adjusted in height according to the diameter of the tire. After the initial position of the intermediate rocker arm is zeroed, its upper end is locked with the frame assembly by a mechanical locking device. The tie rod assembly is adjusted to ensure that the toe value is consistent with the state of the whole vehicle. The spring energy storage chamber is manually adjusted to lock the brake. The bottom of the wheel disc is connected to a six-degree-of-freedom parallel structure platform to realize multi-directional loading and six-component force measurement of the tire grounding point. The KC test bench system measures and collects four-wheel alignment parameters, wheelbase, and wheel jump data.

[0005] The front upper cover plate and the front lower cover plate of the vehicle frame assembly test device are respectively pressed against the cross beam of the front suspension assembly, and four studs are passed through the threaded holes on the front upper cover plate and the front lower cover plate, and fastened with nuts; the screw rod passes through the front fixed support and the front lower cover plate, and the front lower cover plate is stuck in the guide groove on the side of the front fixed support. The front suspension installation height position of the vehicle frame assembly test device can be adjusted up and down by adjusting the screw rod; the rear suspension assembly is pressed by a cross beam, and the cross beam and the rear suspension assembly are clamped up and down by two rear cover plates, and four screw rods are used to tighten the cross beam and the rear suspension assembly. Column 2 passes through the threaded hole on the rear cover plate and is fastened with a nut; the crossbeam and the rear fixed support are clamped by upper and lower slider clamps, screw rod 2 passes through the rear fixed support and the slider clamp, and the slider clamp is stuck in the guide rail groove on the side of the rear fixed support. The rear suspension installation height of the frame assembly test device can be adjusted up and down by adjusting screw rod 2; the frame assembly test device is equipped with a small wheel assembly for convenient mobile transportation, and the upper and lower installation holes of the small wheel assembly and the front suspension assembly and the rear suspension assembly can be adjusted according to the installation height of the frame assembly test device.

[0006] The independent suspension assembly adopts a bilaterally symmetrical structure, and the upper cross arm assembly, the lower cross arm assembly and the column are also symmetrical front to back; the tire is installed on the rim, the rim and the wheel hub brake disc assembly are positioned by a stopper and fastened by bolts; the wheel hub brake disc assembly is supported on the steering knuckle assembly by a bearing, the brake assembly and the wheel hub brake disc assembly are connected by bolts, the spring energy storage air chamber is installed on the brake assembly, the column and the steering knuckle assembly are connected by a revolute pair, and the thrust bearing ensures the axial positioning of the two, the upper cross arm assembly and the lower cross arm assembly are connected to the column by a cylindrical pair, the air spring assembly is installed on the upper end surface of the column, the shock absorber assembly is installed on the side of the column, one end of the suspension rod assembly is connected to the column, and the other end is connected to the lateral stabilizer bar, the lateral stabilizer bar is fixed to the frame assembly test device by stabilizer bar bushings at both ends, the steering knuckle arm and the steering knuckle assembly are fastened by studs and nuts, and the tie rod assembly is connected between the intermediate rocker arm and the steering knuckle arm.

[0007] Compared with the prior art, the present invention adopts an improved frame assembly test device to test and position the independent suspension assembly, which can realize accurate measurement of the KC characteristic test of the independent suspension assembly for buses, facilitate comparison of simulation results with test data and improvement design, form independent suspension forward development capabilities, and ensure that the four-wheel alignment parameters of the independent suspension assembly are consistent with those in the whole vehicle state. Compared with using the whole vehicle for testing, the present invention has a simpler structure, more reliable tooling, lower cost, and less test space. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is the front view of the present invention.

[0009] Figure 2 It is a side view of the present invention.

[0010] Figure 3 It is a schematic diagram of the structure of the independent suspension assembly of the present invention.

[0011] Figure 4 It is a structural schematic diagram of the vehicle frame assembly testing device of the present invention.

[0012] Figure 5 It is a top view of the present invention.

[0013] In the figure: 1, front fixed support, 2, screw rod 1, 3, front lower cover plate, 4, stud 1, 5, frame assembly test device, 51, front suspension assembly, 52, front frame, M1, interface 1, M2, interface 2, M3, interface 3, 53, rear suspension assembly, 54, small wheel assembly, 6, stud 2, 7, screw rod 2, 8, slider clamp, 9, rear fixed support, 10, independent suspension assembly, 11, tire, 12, rim, 13, front upper cover plate, 14, wheel disc, 15, iron floor, 16, Rear cover, 17, cross beam, 101, wheel hub brake disc assembly, 102, brake assembly, 103, steering knuckle arm, 104, column, 105, upper cross arm assembly, 106, stabilizer bar bushing, 107, lateral stabilizer bar, 108, intermediate rocker arm, 109, tie rod assembly, 110, lower cross arm assembly, 111, suspension rod assembly, 112, shock absorber assembly, 113, air spring assembly, 114, spring energy storage chamber, 115, thrust bearing, 116, steering knuckle assembly. DETAILED DESCRIPTION

[0014] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the front upper cover plate 13 and the front lower cover plate 3 of the vehicle frame assembly test device 5 of the present invention are respectively close to the cross beam of the front suspension assembly 51, and four studs 14 are passed through the threaded holes on the front upper cover plate 13 and the front lower cover plate 3, and are fastened with nuts; the screw rod 12 passes through the front fixed support 1 and the front lower cover plate 3, and the front lower cover plate 3 is stuck in the guide rail groove on the side of the front fixed support 1. By adjusting the screw rod 12, the front suspension installation height position of the vehicle frame assembly test device 5 can be adjusted up and down; the rear suspension assembly 53 is pressed by a cross beam 17, and the cross beam 17 and the rear suspension assembly 53 are clamped up and down by two rear cover plates 16, and are used Four studs 26 pass through the threaded holes on the rear cover plate 16 and are fastened with nuts; the upper and lower slider clamps 8 are used to clamp the crossbeam 17 and the rear fixed support 9, the screw rod 26 passes through the rear fixed support 9 and the slider clamp 8, and the slider clamp 8 is stuck in the guide groove on the side of the rear fixed support 9. The rear suspension installation height of the frame assembly test device 5 can be adjusted up and down by adjusting the screw rod 27; the frame assembly test device 5 is provided with a small wheel assembly 54 for convenient movement and transportation, and the upper and lower installation holes of the small wheel assembly 54 and the front suspension assembly 51 and the rear suspension assembly 53 can be adjusted according to the installation height of the frame assembly test device 5.

[0015] The independent suspension assembly 10 adopts a bilaterally symmetrical structure, and the upper cross arm assembly 105, the lower cross arm assembly 110 and the column 104 are also symmetrical front to back; the tire 11 is mounted on the rim 12, the rim 12 and the hub brake disc assembly 101 are positioned through a stopper and fastened with bolts; the hub brake disc assembly 101 is supported on the steering knuckle assembly 116 through a bearing, the brake assembly 102 and the hub brake disc assembly 101 are connected with bolts, the spring energy storage air chamber 114 is mounted on the brake assembly 102, the column 104 and the steering knuckle assembly 116 are connected as a rotating pair, and the thrust bearing 115 ensures that the two Axial positioning, the upper cross arm assembly 105 and the lower cross arm assembly 110 are connected to the column 104 by a cylindrical pair, the air spring assembly 113 is installed on the upper end surface of the column 104, the shock absorber assembly 112 is installed on the side of the column 104, one end of the suspension rod assembly 111 is connected to the column 104, and the other end is connected to the lateral stabilizer bar 107, the lateral stabilizer bar 107 is fixed to the frame assembly test device 5 by the stabilizer bar bushings 106 at both ends, the steering knuckle arm 103 and the steering knuckle assembly 116 are fastened by studs and nuts, and the tie rod assembly 109 is connected between the intermediate rocker arm 108 and the steering knuckle arm 103.

[0016] The independent suspension assembly 10 is positioned by the frame assembly test device 5, the upper cross arm assembly 105 and the lower cross arm assembly 110 are installed on the interface 1 M1 of the front frame 52, the air spring assembly 113 is installed on the interface 2 M2 of the front frame 52, and the shock absorber assembly 112 is installed on the interface 3 M3 of the front frame 52, so as to ensure that the positioning parameters of the independent suspension assembly 10 are consistent with those of the whole vehicle; the front suspension assembly 51 and the rear suspension assembly 53 of the frame assembly test device 5 are respectively pressed by the front fixed support 1 and the rear fixed support 9, and are pressed against the iron floor 15. The clamping device can be adjusted in height according to the diameter of the tire 11; after the intermediate rocker arm 108 is adjusted to zero at the initial position, its upper end is locked with the frame assembly device 5 by a mechanical locking device; the tie rod assembly 109 is adjusted to ensure that the toe value is consistent with the state of the whole vehicle; the spring energy storage chamber 114 is manually adjusted to perform brake locking; the bottom of the wheel disc 14 is connected to a six-degree-of-freedom parallel structure platform to achieve multi-directional loading and six-component force measurement of the tire grounding point, and the KC test bench system measures and collects four-wheel alignment parameters, wheelbase, and wheel jump data.

Claims

1. A KC test method for an independent suspension assembly, characterized in that: The independent suspension assembly (10) is positioned by the frame assembly test device (5), the upper cross arm assembly (105) and the lower cross arm assembly (110) are installed on the interface 1 M1 of the front frame (52) of the frame assembly test device, the air spring assembly (113) is installed on the interface 2 M2 of the front frame (52) of the frame assembly test device (5), and the shock absorber assembly (112) is installed on the interface 3 M3 of the front frame (52) of the frame assembly test device (5), so as to ensure that the positioning parameters of the independent suspension assembly (10) are consistent with those of the whole vehicle; the front suspension assembly (51) and the rear suspension assembly (53) of the frame assembly test device (5) are respectively pressed by the front fixed support (1) and the rear fixed support (9), and are connected to the iron floor (15). The clamping device can be adjusted in height according to the diameter of the tire (11); after the intermediate rocker arm (108) is adjusted to zero at the initial position, its upper end is locked with the frame assembly test device (5) by a mechanical locking device; the tie rod assembly (109) is adjusted to ensure that the toe value is consistent with the state of the whole vehicle; the spring energy storage chamber (114) is manually adjusted to perform brake locking; the bottom of the wheel disc (14) is connected to a six-degree-of-freedom parallel structure platform to achieve multi-directional loading and six-component force measurement of the tire grounding point, and the KC test bench system measures and collects four-wheel alignment parameters, wheelbase, and wheel jump data.

2. The independent suspension assembly KC test method according to claim 1, characterized in that: The front upper cover plate (13) and the front lower cover plate (3) of the vehicle frame assembly test device (5) are respectively attached to the cross beam of the front suspension assembly (51), and four studs (4) are passed through the threaded holes on the front upper cover plate (13) and the front lower cover plate (3) and fastened with nuts; the screw rod (2) passes through the front fixed support (1) and the front lower cover plate (3), and the front lower cover plate (3) is stuck in the guide rail groove on the side of the front fixed support (1), and the front suspension installation height position of the vehicle frame assembly test device (5) can be adjusted up and down by adjusting the screw rod (2); the rear suspension assembly (53) is pressed by a cross beam (17), and the cross beam (17) and the rear suspension assembly (53) are clamped up and down by two rear cover plates (16), and four studs (6) are passed through the threaded holes on the rear cover plate (16) and fastened with nuts; The cross beam (17) and the rear fixed support (9) are clamped by upper and lower slider clamps (8), the second stud (6) passes through the rear fixed support (9) and the slider clamp (8), the slider clamp (8) is clamped in the guide rail groove on the side of the rear fixed support (9), and the rear suspension installation height of the frame assembly test device (5) can be adjusted up and down by adjusting the second screw rod (7); the frame assembly test device (5) is provided with a small wheel assembly (54) for convenient movement and transportation, and the upper and lower installation holes of the small wheel assembly (54) and the front suspension assembly (51) and the rear suspension assembly (53) can be adjusted according to the installation height of the frame assembly test device (5).

3. An independent suspension assembly, comprising the independent suspension assembly KC test method according to claim 1, characterized in that: The independent suspension assembly (10) adopts a bilaterally symmetrical structure, and the upper cross arm assembly (105), the lower cross arm assembly (110) and the column (104) are also symmetrical in front and back. The tire (11) is mounted on the rim (12), and the rim (12) and the wheel hub brake disc assembly (101) are positioned by means of a stopper and fastened by means of bolts. The wheel hub brake disc assembly (101) is supported on the steering knuckle assembly (116) by means of a bearing, the brake assembly (102) and the wheel hub brake disc assembly (101) are connected by means of bolts, the spring energy storage chamber (114) is mounted on the brake assembly (102), the column (104) and the steering knuckle assembly (116) are connected by means of a revolute pair, and the thrust bearing (115) ensures the axial positioning of the two. The upper cross arm assembly (105) and the lower cross arm assembly (110) are connected to the column (104) by a cylindrical pair. The air spring assembly (113) is installed on the upper end surface of the column (104). The shock absorber assembly (112) is installed on the side of the column (104). One end of the suspension rod assembly (111) is connected to the column (104) and the other end is connected to the lateral stabilizer bar (107). The lateral stabilizer bar (107) is fixed to the frame assembly test device (5) by stabilizer bar bushings (106) at both ends. The steering knuckle arm (103) and the steering knuckle assembly (116) are fastened by studs and nuts. The tie rod assembly (109) is connected between the intermediate rocker arm (108) and the steering knuckle arm (103).

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