An electric drive independent suspension bench test system

Abstract

The application discloses an electric drive independent suspension bench test system, which comprises a support frame fixed on the ground, a vehicle frame, a suspension assembly connected with the vehicle frame, two opposite hub shafts, a wheel hub load distribution assembly for applying a load in a first direction at a wheel hub position, the wheel hub load distribution assembly being correspondingly connected between the hub shaft and the support frame, and a motor load distribution assembly capable of applying a load in a second direction, one end of the motor load distribution assembly being fixed to the vehicle frame and the other end being fixed to the support frame, the motor load distribution assembly being located between the two hub shafts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of suspension bench test, in particular to an electric drive independent suspension bench test system. BACKGROUND

[0002] The electric drive independent suspension adds a motor drive assembly on the basis of the independent suspension, and the motor assembly is connected to the rear subframe through a motor suspension.

[0003] During driving, the electric drive independent suspension is subjected to very complex stress conditions, not only bearing the load transmitted from the tire during vehicle driving, but also bearing the load transmitted from the motor suspension mounting point during the inertia and driving of the whole vehicle. Therefore, the electric drive independent suspension assembly needs to be subjected to durability test to ensure that the strength of the electric drive independent suspension assembly meets the safety requirements.

[0004] The existing independent suspension bench test is usually carried out under the condition of loading wheel hub load, but such test mainly applies the load transmitted from the tire during vehicle driving to the independent suspension, and the load transmitted from the motor suspension mounting point during the inertia and driving of the whole vehicle is not considered. Therefore, the stress condition of the electric drive independent suspension on the bench is different from the real stress condition during whole vehicle road test. SUMMARY

[0005] An object of the present application is to provide a new technical solution of an electric drive independent suspension bench test system.

[0006] In one aspect of the present application, an electric drive independent suspension bench test system is provided, which comprises: a support frame fixed on the ground; a vehicle frame; a suspension assembly connected to the vehicle frame, the suspension assembly comprising two opposite hub shafts; a wheel hub load distribution assembly for applying a load in a first direction at the wheel hub position, the wheel hub load distribution assembly being connected between the hub shaft and the support frame; and a motor load distribution assembly capable of applying a load in a second direction, one end of the motor load distribution assembly being fixed to the vehicle frame and the other end being fixed to the support frame, the motor load distribution assembly being located between the two hub shafts.

[0007] Optionally, the motor load distribution assembly comprises a load distribution body; the motor load distribution assembly further comprises a connecting seat and a support plate, the connecting seat being fixed to the vehicle frame and being fixedly connected to the support plate, and the load distribution body being ball-jointed to the support plate in the vertical direction.

[0008] Optionally, the motor load distribution assembly comprises three connecting seats, i.e., a first connecting seat, a second connecting seat and a third connecting seat, the vehicle frame comprises a sub-frame and a cross beam parallel to the sub-frame, the first connecting seat and the second connecting seat are symmetrically arranged on the sub-frame relative to the center line of the vehicle in the length direction, and the third connecting seat is fixed to the cross beam and located on the extension line of the midpoint of the first connecting seat and the second connecting seat.

[0009] Optionally, the first connecting seat and the second connecting seat each comprise a first fixed end and a first connecting rod hinged to the first fixed end.

[0010] The third connecting seat comprises a second fixed end and a second connecting rod ball-jointed to the second fixed end, and the first connecting rod and the second connecting rod are fixedly connected to the side wall of the support plate.

[0011] Optionally, the cross beam comprises a through hole for allowing the vehicle frame to pass through, the second fixed end is fixed to the outer side of the cross beam, the end of the second connecting rod passes through the through hole from the outer side of the cross beam, and the second connecting rod is connected to the support plate.

[0012] Optionally, a waist hole matched with the connecting rod is formed in the support plate, and the end of the connecting rod connected to the support plate can slide in the waist hole.

[0013] Optionally, the wheel hub load distribution assembly comprises a load distribution body and a connecting piece, and the load distribution body is fixed to the hub shaft through the connecting piece.

[0014] Optionally, the rack further comprises:

[0015] a fixed frame;

[0016] a plurality of vertical columns fixed to the ground, the vertical columns being arranged at intervals;

[0017] a cross-shaped support fixed to the vertical columns, and the fixed frame being suspended on the upper part of the support;

[0018] the suspension assembly is fixed to the lower part of the cross-shaped support, the wheel hub load distribution assembly is located on the outer side of the support, and the motor load distribution assembly is located at the opening in the middle part of the support, and the top ends of the wheel hub load distribution assembly and the motor load distribution assembly are extended out of the support from the lower part of the support and connected to the fixed frame.

[0019] Optionally, a plurality of connecting assemblies are arranged on the support, and the suspension assembly is hung on the lower part of the support through the connecting assemblies and can move relative to the support.

[0020] Optionally, the support comprises a pair of first beams and a pair of second beams arranged in pairs, the first beams and the second beams form a cross shape, and the connecting assemblies are fixed to the first beams;

[0021] a waist hole is arranged at the position where the first beams and the second beams are connected; and / or,

[0022] a waist hole is arranged at the position where the connecting assemblies are connected to the first beams.

[0023] By means of the wheel hub load distribution assembly and the motor load distribution assembly being arranged together on the suspension assembly to be tested, the durability of the suspension assembly in the two cases of wheel hub load distribution and motor load distribution can be tested at the same time, the actual working condition of the electric drive independent suspension after being combined with the motor drive assembly can be simulated more accurately, the test precision is further improved, and the test efficiency is also significantly improved.

[0024] Other features of the present specification and its advantages will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present specification and, together with the description, serve to explain the principles of the present specification.

[0026] Figure 1 is a partial structure diagram of the electric drive independent suspension bench test system in the embodiment of the present application;

[0027] Figure 2 is a structure diagram of the suspension assembly in the embodiment of the present application;

[0028] Figure 3 is a side view of the bench of the electric drive independent suspension bench test system in the embodiment of the present application;

[0029] Figure 4 is a top view of the bench of the electric drive independent suspension bench test system in the embodiment of the present application;

[0030] Figure 5 is a structure diagram of the electric drive independent suspension bench test system in the embodiment of the present application;

[0031] Figure 6 is a structure diagram of the fixing part of the electric drive independent suspension bench test system in the embodiment of the present application.

[0032] Explanation of reference signs:

[0033] 100. Frame; 110. Subframe; 111. Reinforcing plate; 120. Crossbeam; 121. Through hole; 130. Longitudinal beam; 200. Suspension assembly; 210. Wheel hub axle; 220. Elastic device; 230. Connecting trailing arm; 300. Motor mounting assembly; 310. Mounting body; 321. First connecting seat; 322. Second connecting seat; 323. Third connecting seat; 331. First fixed end; 332, First connecting rod; 341, Second fixed end; 342, Second connecting rod; 330, Support plate; 400, Wheel center loading assembly; 420, Connector; 500, Platform; 510, Column; 520, Bracket; 521, First beam; 522, Second beam; 523, Waist hole; 524, Connecting assembly; 800, Fixing member; 810, Connecting end; 820, Clamping end; 830, Brake disc. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] This application uses the suspension assembly 200 as an example of an independent suspension. The electric independent suspension in this application is based on an independent suspension with the addition of a motor drive assembly, which is connected to the rear subframe 110 via a motor mount.

[0036] According to one embodiment of this application, an electric independent suspension bench test system is provided, which includes a vehicle frame 100, a suspension assembly 200, a wheel center loading assembly 400, and a motor loading assembly 300. For example... Figure 1 As shown, the suspension assembly 200 is connected to the frame 100 and includes two opposing hub axles 210. A wheel center load cell 400 is used to apply a load in a first direction at the wheel center position and is correspondingly connected to the hub axle 210. A motor load cell 300 is capable of applying a load in a second direction and is fixed to the frame 100 and located between the two hub axles 210. A support frame (not shown) fixed to the ground is connected to the upper ends of the wheel center load cell 400 and the motor load cell 300.

[0037] The frame 100 is the supporting structure of the vehicle. In this application, the frame 100 refers to the part used to cooperate with the experiment. It can be the whole of the actual vehicle frame or a part of the actual vehicle frame. It serves to connect with the suspension assembly 200 and support the wheel center load assembly 400 and the motor load assembly 300.

[0038] In the present application, the vehicle frame 100 includes a sub-frame 110, which is the skeleton of the front and rear axles and is a component of the front and rear axles. The wheel hub load assembly 400 refers to a device located at the wheel hub position of the independent suspension, which is used to apply a set of forces to the independent suspension at the wheel hub position during the experiment. Similarly, the motor load assembly 300 is used to simulate the connection of the vehicle drive motor assembly (e.g., including the drive motor and motor suspension) to the independent suspension, and can apply a set of forces to the independent suspension. The wheel hub load assembly 400 is designed to apply a set of forces in a conventional manner, which will not be described in detail here.

[0039] By arranging the wheel hub load assembly 400 and the motor load assembly 300 together on the suspension assembly 200 to be tested, the durability of the suspension assembly 200 under both wheel hub load and motor load conditions can be tested simultaneously, which can more accurately simulate the actual working conditions of the electric drive independent suspension with the motor drive assembly, further improving the test accuracy and significantly improving the test efficiency.

[0040] To further improve the accuracy of the test and more closely simulate the actual working conditions of the suspension assembly 200 to be tested, the first direction and the second direction are two directions opposite in the vertical direction. For example, referring to Figure 1 , the wheel hub load assembly 400 located on both sides of the hub shaft 210 simultaneously loads the force in the same direction perpendicular to the upward direction (along the positive Z direction in the coordinate system in the figure). The motor load assembly 300 and the wheel hub load assembly 400 simultaneously load the force in the opposite direction perpendicular to the downward direction (along the negative Z direction in the coordinate system in the figure).

[0041] Specifically, during the test, Figure 1 , the hub shaft 210 is located on both sides of the independent suspension in the width direction and is oppositely arranged. The brake disc 830 is also arranged on the hub shaft 210, and the brake disc 830 is located on the side of the wheel hub load assembly 400 close to the independent suspension, i.e., the wheel hub load assembly 400 is located on the outside of the brake disc 830.

[0042] To prevent the brake disc 830 from rotating and affecting the experiment, referring to Figure 1 and Figure 5 , a fixing member 800 is arranged on the brake disc 830. The fixing member 800 has a connecting end 810 and a clamping end 820, the connecting end 810 is fixedly connected to the hub shaft 210, and the outer edge of the brake disc 830 is embedded in the clamping end 820 and is clamped and fixed by the clamping end 820.

[0043] In one embodiment, to more closely simulate the working conditions of the suspension assembly 200, the motor load assembly 300 includes a load body 310;

[0044] The motor load distribution assembly 300 further comprises a connecting seat and a support plate 330, the connecting seat is fixed on the vehicle frame 100 and fixedly connected with the side wall of the support plate 330, and the load distribution body 310 is ball-jointed with the support plate 330 in the vertical direction.

[0045] For example, the support plate 330 is provided with a ball socket structure, and the load distribution body 310 is provided with a ball shaft, and the load distribution body 310 is connected with the support plate 330 through the cooperation of the ball socket and the ball shaft. The top end of the load distribution body 310 is connected with a support frame (not shown in the figure), and when the support plate 330 shakes with the suspension assembly 200 during the test, the load distribution body 310 can always be kept in the vertical direction.

[0046] Referring to Figure 1 , the motor load distribution assembly 300 comprises three connecting seats, namely a first connecting seat 321, a second connecting seat 322 and a third connecting seat 323, the vehicle frame 100 comprises a sub-frame 110 and a cross beam 120 parallel to the sub-frame 110, the first connecting seat 321 and the second connecting seat 322 are symmetrically arranged on the sub-frame 110 with respect to the center line of the vehicle length direction, and the third connecting seat 323 is fixed on the cross beam 120 and located on the extension line of the midpoint between the first connecting seat 321 and the second connecting seat 322, so as to enhance the connection strength between the suspension assembly 200 and the support plate 330.

[0047] For example, each connecting seat comprises a fixed end and a connecting rod, the fixed end is hinged with the connecting rod, the fixed end is fixed on the vehicle frame 100, and the connecting rod is connected with the support plate 330.

[0048] For example, as shown in Figure 1 and Figure 2 , the fixed end comprises two types of first fixed end 331 and second fixed end 341, the first fixed end 331 is arranged on the upper surface of the vehicle frame 100 opposite to the bottom surface of the support plate 330, and the second fixed end 341 is fixed on the surface of the vehicle frame 100 opposite to the side surface of the support plate 330. The first connecting seat 321 and the second connecting seat 322 are the same in structure and both comprise the first fixed end 331. The first connecting rod 332 is hinged with the first fixed end 331 and fixed on the side wall of the support plate 330. The first connecting rod 332 is arranged perpendicularly to the first fixed end 331. The second fixed end 341 and the second connecting rod 342 are located on the same straight line and fixed on the side surface of the support plate 330 away from the first connecting seat 321 and the second connecting seat 322. In this way, the height difference between the sub-frame 110 and the cross beam 120 can be compensated, so that the support plate 330 is located on the horizontal plane.

[0049] Referring to Figure 1 and Figure 2The cross beam 120 comprises a through hole 121 for allowing the frame 100 to pass through, the second fixing end 341 is fixed to the outer side of the cross beam 120, and the end of the second connecting rod 342 passes through the through hole 121 of the outer side of the cross beam 120 and is connected with the support plate 330.

[0050] In order to improve the adaptability of the support plate 330, a waist hole 523 matched with the connecting rod is formed in the support plate 330, and the end of the connecting rod connected with the support plate 330 can slide in the waist hole 523, so that the support plate 330 can be fixed on a suspension of more sizes.

[0051] For example, referring to Figure 1 The wheel hub load distribution assembly 400 also comprises the load distribution body 310 and the connecting member 420, the load distribution body 310 is fixed to the hub shaft 210 through the connecting member 420. The connecting member 420 is connected with the hub shaft 210 through bolts.

[0052] For example, referring to Figure 2 Specifically, the frame 100 further comprises a longitudinal beam 130, two ends of the longitudinal beam 130 are respectively connected with the sub-frame 110 and the cross beam 120; a reinforcing plate 111, the reinforcing plate 111 extends outward at the end of the longitudinal beam 130; the suspension assembly 200 further comprises: a resilient device 220, the shock absorber and the resilient device 220 are respectively connected with the longitudinal beam 130; and a hub bracket 520 for supporting the hub shaft 210, the hub bracket 520 is provided with a connecting longitudinal arm 230 on the side facing the sub-frame 110, for being connected with the frame 100.

[0053] In an embodiment of the present application, the test system further comprises a rack 500, as Figure 3 shown, the rack 500 comprises four columns 510 fixed to the ground, the columns 510 are arranged at intervals. The rack 500 further comprises a cross-shaped bracket 520, the bracket 520 is fixed to the columns 510, and the bracket 520 is located at the lower part of a support frame (not shown in the figure) in the vertical direction.

[0054] The suspension assembly 200 is fixed at the lower part of the bracket 520, the wheel hub load distribution assembly 400 is located at the outer side of the bracket 520, and the motor load distribution assembly 300 is located at the mouth of the middle part of the bracket 520, the top ends of the motor load distribution assembly 300 all extend upward from the lower part of the bracket 520 and are connected with the support frame. In this way, better support force can be provided for the suspension assembly 200.

[0055] Optionally, Figure 3 The bracket 520 in the above embodiment comprises a pair of first beams 521 and second beams 522, the first beams 521 are vertically arranged on the second beams 522. At least one of the first beams 521 and the second beams 522 is provided with a waist hole 523, so that the position between the first beams 521 and the second beams 522 can be adjusted to adapt to suspension assemblies 200 of different sizes.

[0056] As shown in Figure 4 In order to hoist the suspension assembly 200 under the first beam 521 and the second beam 522, a connecting assembly 524 matched with the suspension assembly 200 is installed on the first beam 521 and the second beam 522, and the connecting assembly 524 is connected with the suspension assembly 200.

[0057] The principles and implementations of the present application are described herein with specific examples. The above examples are only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified, and these improvements and modifications also fall within the scope of the claims of the present application.

Claims

1. A test system for an electric-driven independent suspension bench, characterized in that, include: A support frame fixed to the ground; Frame; A suspension assembly connected to the vehicle frame, the suspension assembly including two opposing hub axles; A wheel center load-bearing assembly, which is used to apply a load in a first direction at the wheel center position, and is correspondingly connected between the wheel hub shaft and the support frame; A motor mounting assembly capable of applying a load in a second direction, one end of the motor mounting assembly being fixed to the vehicle frame and the other end being fixed to the support frame, the motor mounting assembly being located between the two wheel hub axles; The motor mounting assembly includes a mounting body and a support plate. The support plate is fixed to the vehicle frame. The mounting body is ball-jointed to the support plate in the vertical direction. The top of the mounting body is connected to the support frame. The motor mounting assembly also includes a connecting seat, which is fixed to the vehicle frame and fixedly connected to the support plate. The motor mounting assembly includes three connecting seats, namely a first connecting seat, a second connecting seat and a third connecting seat. The frame includes a subframe and a crossbeam parallel to the subframe. The first connecting seat and the second connecting seat are symmetrically arranged on the subframe with respect to the centerline of the vehicle length direction. The third connecting seat is fixed to the crossbeam and is located on the extension line of the midpoint between the first connecting seat and the second connecting seat. Both the first connecting seat and the second connecting seat include a first fixed end and a first connecting rod hinged to the first fixed end; The third connecting seat includes a second fixed end and a second connecting rod ball-joined with the second fixed end, and the first connecting rod and the second connecting rod are fixedly connected to the side wall of the support plate; The crossbeam includes a through hole for allowing the frame to pass through, the second fixed end is fixed to the outside of the crossbeam, and the end of the second connecting rod passes through the through hole from the outside of the crossbeam and is connected to the support plate. The support plate has a waist hole that matches the first connecting rod and the second connecting rod, and the ends of the first connecting rod and the second connecting rod that are connected to the support plate can slide in the waist hole.

2. The testing system according to claim 1, characterized in that, The wheel hub mounting assembly includes a mounting body and a connector, wherein the mounting body is fixed to the wheel hub axle via the connector.

3. The testing system according to claim 1, characterized in that, It also includes a test bench, the test bench comprising: Fixture; The columns are fixed to the ground and are spaced apart. A grid-shaped support frame, which is fixed to the column, and the fixing frame is suspended above the grid-shaped support frame; The suspension assembly is fixed to the lower part of the grid-shaped bracket. The wheel center load assembly is located on the outside of the grid-shaped bracket. The motor load assembly is located at the opening in the middle of the grid-shaped bracket. The tops of the wheel center load assembly and the motor load assembly extend upward from the lower part of the grid-shaped bracket and are connected to the fixing frame.

4. The testing system according to claim 3, characterized in that, Multiple connecting components are provided on the grid-shaped bracket. The suspension assembly is hung on the lower part of the grid-shaped bracket through the connecting components and can move relative to the grid-shaped bracket.

5. The testing system according to claim 4, characterized in that, The grid-shaped support includes a pair of first beams and a pair of second beams, the first beams and the second beams forming a grid shape, and the connecting component is fixed on the first beam; A waist hole is provided at the connection point between the first beam and the second beam; and / or, A waist hole is provided at the location where the connecting component connects to the first beam.

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