An integrated suspension device based on a torsional inertia container

Abstract

The invention discloses an integrated suspension device based on a torsion inertia device, comprising a torsion inertia device, a single longitudinal arm, a wheel hub motor, a wheel, a coupling, a motor and a vehicle body, a torsion bar spring is further arranged between the motor and the single longitudinal arm, a connecting plate is arranged on the vehicle body close to the single longitudinal arm on one side thereof for connecting the vehicle body and the torsion inertia device; one end of the torsion bar spring is connected to the rotating shaft of the motor through the coupling, the other end of the torsion bar spring is connected to the single longitudinal arm, the torsion inertia device is connected to the single longitudinal arm, and the bottom of the single longitudinal arm is fixedly connected to the wheel and the wheel hub motor; the invention has the beneficial effects that the invention adopts an arrangement scheme of the coupling effect of the torsion bar spring and the torsion inertia device, has a good shock absorption effect, a high transmission efficiency, can realize a certain range of vehicle height adjustment, and meets the requirements of the vehicle passing through complex roads; and can effectively reduce the space occupied by the suspension system, the mechanical structure is less affected by nonlinear factors, has stable performance, and has a good use effect.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle suspension, in particular to an integrated suspension device based on a torsion inertia container. Background Art

[0002] The concept of inertia capacitor was proposed by Professor Smith of Cambridge University in 2002. As a two-terminal mass element, the inertia capacitor breaks through the limitation of "grounding" of single-terminal mass elements, fills the gap between mass and capacitor in electromechanical similarity theory, and can be effectively applied to the design of vibration isolation and stability control systems; Torsion inertia capacitor is a kind of inertia capacitor, and for the relative torsional vibration of the two ends, the inertia capacitor can improve the stability of the system; As a vibration isolation element widely used in the field of vehicles, the inertia capacitor makes up for the lack of traditional suspension inertia elements. Experiments have proved that the inertia capacitor has obvious suppression of low-frequency vibration;

[0003] However, during the use of the torsion inertia device, when the height of the vehicle body changes, the shock absorption effect is not good, and the transmission efficiency is low. For example, in the Chinese invention patent CN111572306B, the torsion inertia device is applied to the lateral stabilization device. The electromechanical inertia device not only broadens the control mode of the lateral stabilization system, but also effectively improves the vibration isolation performance of the system. However, the torsion inertia device structure uses a double gear transmission, and the first-stage external gear is installed on the eccentric section of the eccentric shaft, and the two-stage external gear is an integrated structure; the shock absorption effect is not good, and the transmission efficiency of the gear is relatively low during operation;

[0004] In view of the above situation, it is necessary to improve the existing vehicle suspension device based on the inertia container so that it can adapt to the current needs of the vehicle suspension system. Summary of the invention

[0005] The purpose of the present invention is to avoid the deficiencies in the prior art and to provide an integrated suspension device based on a torsion inertia container, which can achieve a certain range of vehicle height adjustment to meet the requirements of the vehicle passing through complex roads; and can effectively reduce the space occupied by the suspension system, the mechanical structure is less affected by nonlinear factors, and the performance is stable.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is an integrated suspension device based on a torsion inertia device, comprising a torsion inertia device, a single longitudinal arm, a wheel hub motor, a wheel, a coupling, a motor, and a vehicle body. The torsion inertia device is arranged in the vehicle body, and a torsion bar spring is also arranged between the motor and the vehicle body. A connecting plate is arranged on the side of the torsion inertia device close to the vehicle body for connecting the vehicle body and the torsion inertia device; one end of the torsion bar spring is connected to the rotating shaft of the motor through a coupling, and the other end of the torsion bar spring is connected to the single longitudinal arm, the torsion inertia device is connected to the single longitudinal arm, and the bottom of the single longitudinal arm is fixedly connected to the wheel and the wheel hub motor.

[0007] As a further supplement to the technical solution, both ends of the torsion bar spring are provided with splines.

[0008] To further supplement the technical solution, the connecting plate is symmetrically arranged in the upper and lower parts, and a spline a is provided on the side of the torsional inertia container close to the single longitudinal arm. The single longitudinal arm includes a connecting plate groove, an internal spline c, and an internal spline a symmetrically arranged in the upper and lower parts. The connecting plate passes through the connecting plate groove to fix the vehicle body and the torsional inertia container, the internal spline c is spline-connected to the right end of the torsion bar spring, and the internal spline a is connected to the spline a of the torsional inertia container.

[0009] As a further supplement to the technical solution, the coupling includes a left end of the coupling and an internal spline b, the left end of the coupling is connected to the motor output shaft, and the internal spline b is connected to the spline at the left end of the torsion bar spring.

[0010] As a further supplement to the present technical solution, the torsional inertia container includes an eccentric shaft, a first external gear installed on the eccentric shaft through a ball bearing, a second external gear, a first internal gear meshingly connected to the first external gear, a second internal gear meshingly connected to the second external gear, a flywheel arranged on the side of the eccentric shaft away from the spline a, and a shell arranged on the eccentric shaft; the spline a is arranged on the side of the eccentric shaft close to the vehicle body.

[0011] As a further supplement to the technical solution, the eccentric shaft includes an input shaft, a left end of an eccentric shaft coupling arranged on one side of the input shaft, a right end of an eccentric shaft coupling arranged on the left end of the eccentric shaft coupling away from the input shaft, an intermediate shaft arranged between the left end of the eccentric shaft coupling and the right end of the eccentric shaft coupling, and an output shaft arranged on the right end of the eccentric shaft coupling away from the input shaft; the right end of the input shaft is fixedly connected to the left end of the eccentric shaft coupling, the left end of the intermediate shaft is fixedly connected to the left end of the eccentric shaft coupling, the right end of the intermediate shaft is fixedly connected to the right end of the eccentric shaft coupling, the left end of the output shaft is fixedly connected to the right end of the eccentric shaft coupling, the first external gear is installed on the intermediate shaft through a ball bearing, the second external gear is connected to the output shaft through a connecting ball bearing, the flywheel is fixedly installed on the output shaft, and the spline a is arranged on the input shaft.

[0012] As a further supplement to the present technical solution, the housing comprises an outer housing and an inner housing, the inner housing is connected to the first internal gear and the second internal gear by welding, one end of the inner housing is mounted on the left end of the input shaft by a ball bearing, the other end of the inner housing is mounted on the output shaft by a ball bearing, the two ends of the outer housing are connected to the two ends of the inner housing by ball bearings, and the outer housing is connected to the vehicle body by a connecting plate and is fixed so as not to rotate.

[0013] As a further supplement to the technical solution, the connecting plate connects the vehicle body and the torsional inertia container by welding.

[0014] As a further supplement to the technical solution, the connecting plate is arranged at an angle.

[0015] As a further supplement to the technical solution, the connection plates symmetrically arranged up and down are distributed in an eight-shaped shape.

[0016] The beneficial effect lies in that the present invention adopts the arrangement scheme of the coupling effect of the torsion bar spring and the torsion inertia container, which has good shock absorption effect and high transmission efficiency, can realize vehicle height adjustment within a certain range, and meet the requirements of the vehicle passing through complex roads; and can effectively reduce the space occupied by the suspension system, the mechanical structure is less affected by nonlinear factors, the performance is stable, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an integrated suspension device based on a torsional inertia container of the present invention;

[0018] Figure 2 yes Figure 1 The structural diagram of the torsion inertia container;

[0019] Figure 3 yes Figure 2 A diagram showing the matching relationship between the first internal gear 11, the first external gear 12, the second internal gear 13, and the second external gear 14;

[0020] Figure 4 yes Figure 2 Schematic diagram of the structure of the eccentric shaft;

[0021] Figure 5 yes Figure 1 Schematic diagram of the structure of the torsion bar spring;

[0022] Figure 6 yes Figure 1 The structural diagram of the single trailing arm in FIG.

[0023] Figure 7 yes Figure 1 Schematic diagram of the structure of the middle coupling;

[0024] In the figure, 1, torsional inertia container; 2, single longitudinal arm; 3, hub motor; 4, wheel; 5, vehicle body; 6, torsion bar spring; 7, motor; 8, coupling; 9, connecting plate; 11, first internal gear; 12, first external gear; 13, second internal gear; 14, second external gear; 15, eccentric shaft; 16, flywheel; 17, outer shell; 18, inner shell; 19, spline a; 151, input shaft; 152, left end of eccentric shaft coupling; 153, right end of eccentric shaft coupling; 154, connecting ball bearing; 155, output shaft; 156, intermediate shaft; 61, spline b; 62, spline c; 21, connecting plate groove; 22, internal spline c; 23, internal spline a; 81, internal spline b; 82, left end of coupling. DETAILED DESCRIPTION

[0025] The original intention of the design of the present invention is to provide an integrated suspension device based on a torsion inertia container, which can achieve a certain range of vehicle height adjustment to meet the requirements of the vehicle passing through complex roads; and can effectively reduce the space occupied by the suspension system, the mechanical structure is less affected by nonlinear factors, and the performance is stable.

[0026] In order to make the technical solution more clear to those skilled in the art, Figure 1-7 Explain the specific structure and principle of each of the above institutions:

[0027] An integrated suspension device based on a torsion inertia device 1 comprises a torsion inertia device 1, a single longitudinal arm 2, a wheel hub motor 73, a wheel 4, a coupling 8, a motor 7, and a vehicle body 5. The torsion inertia device 1 is arranged in the vehicle body 5, and a torsion bar spring 6 is also arranged between the motor 7 and the vehicle body 5. A connecting plate 9 is arranged on the side of the torsion inertia device 1 close to the vehicle body 5 for connecting the vehicle body 5 and the torsion inertia device 1. Specifically, the connecting plate 9 connects the vehicle body 5 and the torsion inertia device 1 by welding; one end of the torsion bar spring 6 is connected to the rotating shaft of the motor 7 through the coupling 8, and the other end of the torsion bar spring 6 is connected to the single longitudinal arm 2. Specifically, a spline a19 is arranged on the side of the torsion inertia device 1 close to the single longitudinal arm 2, and splines are arranged at both ends of the torsion bar spring 6, which are splines b61 and splines c62 respectively; the single longitudinal arm 2 comprises a connecting plate 9 groove symmetrically arranged up and down , inner spline c22, inner spline a23, the inner spline c22 is connected to the spline c62 at the right end of the torsion bar spring 6, the coupling 8 includes a left end 82 of the coupling and an inner spline b81, the left end 82 of the coupling is connected to the rotating shaft of the motor 7, the inner spline b81 is connected to the spline b61 at the left end of the torsion bar spring 6; the torsional inertia container 1 is connected to the single longitudinal arm 2, and the inner spline a23 is connected to the spline a19 of the torsional inertia container 1; the structure of the connecting plate 9 will be described in detail below, corresponding to the connecting plate 9 groove, the connecting plate 9 is symmetrically arranged up and down, in detail, the connecting plate 9 is inclined, preferably, the connecting plates 9 symmetrically arranged up and down are distributed in an eight-shaped shape, and the fixing effect is achieved; the connecting plate 9 passes through the connecting plate 9 groove to fix the vehicle body 5 and the torsional inertia container 1; the bottom of the single longitudinal arm 2 is fixedly connected to the wheel 4 and the hub motor 73.

[0028] The torsional inertia device 1 includes an eccentric shaft 15, a first external gear 12 mounted on the eccentric shaft 15 through a ball bearing, a second external gear 14, a first internal gear 11 meshingly connected to the first external gear 12, a second internal gear 13 meshingly connected to the second external gear 14, a flywheel 16 arranged on the side of the eccentric shaft 15 away from the spline a19, and a shell arranged on the eccentric shaft 15; the spline a19 is arranged on the side of the eccentric shaft 15 close to the vehicle body 5.

[0029] The structure of the eccentric shaft 15 will be described in detail below. The eccentric shaft 15 includes an input shaft 151, a left end 152 of an eccentric shaft coupling disposed on one side of the input shaft 151, a right end 152 of an eccentric shaft coupling disposed on the side of the left end 152 of the eccentric shaft coupling away from the input shaft 151, an intermediate shaft 156 disposed between the left end 152 of the eccentric shaft coupling and the right end 153 of the eccentric shaft coupling, and an output shaft 155 disposed on the side of the right end 153 of the eccentric shaft coupling away from the input shaft 151; the right end of the input shaft 151 is fixedly connected to the left end 152 of the eccentric shaft coupling, the left end of the intermediate shaft 156 is fixedly connected to the left end 152 of the eccentric shaft coupling, the right end of the intermediate shaft 156 is fixedly connected to the right end 153 of the eccentric shaft coupling, and the left end of the output shaft 155 is fixedly connected to the right end 153 of the eccentric shaft coupling. The first external gear 12 is fixedly connected, the first external gear 12 is mounted on the intermediate shaft 156 through a ball bearing, the second external gear 14 is connected to the output shaft 155 through a connecting ball bearing 154, the flywheel (16) is fixedly mounted on the output shaft 155, and the spline a19 is arranged on the input shaft 151; wherein the housing is used to connect the torsional inertia container 1 with the connecting plate 9; in detail, the housing comprises an outer housing 17 and an inner housing 18, the inner housing 18 is connected to the first internal gear 11 and the second internal gear 13 by welding, one end of the inner housing 18 is mounted on the left end of the input shaft 151 through a ball bearing, and the other end of the inner housing 18 is mounted on the output shaft 155 through a ball bearing, the two ends of the outer housing 17 are connected to the two ends of the inner housing 18 through ball bearings, and the outer housing 17 is connected to the vehicle body 5 through the connecting plate 9 and is fixed and does not rotate.

[0030] The overall working principle of the present invention will be systematically described below: When adjusting the height of the vehicle body 5, the output shaft of the motor 7 outputs torque, which acts on the torsion bar spring 6 through the coupling 8. At this time, the left end of the torsion bar spring 6 rotates due to the torque, and then the torque is transmitted from the torsion bar spring 6 to the connection with the single longitudinal arm 2, driving the single longitudinal arm 2 to rotate a certain angle, thereby realizing the function of quickly adjusting the height of the vehicle body 5. At this time, the input shaft 151 of the torsion inertia container 1 rotates due to the deflection of the single longitudinal arm 2, and the outer shell 17 is fixed to the vehicle body 5 through the connecting plate 9 and does not rotate, thereby transferring the torsion from the torsion bar spring 6 to the connection with the single longitudinal arm 2. The input shaft 151 is transmitted to the first external gear 12, driving the rotation of the first internal gear 11. The first internal gear 11 is connected to the inner housing 18 of the torsion inertia container 1, thereby driving the inner housing 18 of the torsion inertia container 1 to rotate. At the same time, the second internal gear 13 is connected to the inner housing 18. The rotation of the inner housing 18 can drive the second internal gear 13 to rotate, which drives the second external gear 14 to rotate. The second external gear 14 is fixedly connected to the flywheel 16 through the output shaft 155. At this time, the flywheel 16 rotates with the rotation of the second external gear 14, thereby achieving a vibration isolation effect when the height of the vehicle body 5 changes.

[0031] When encountering an uneven road surface, the single longitudinal arm 2 itself will deflect to a certain extent and drive the torsion bar spring 6 to generate elastic force. At the same time, the flywheel 16 of the torsion inertia container 1 rotates to generate inertial force to offset the height change of the vehicle body 5 caused by the impact of the road surface and improve the ride comfort of the vehicle.

[0032] The working principle of the torsional inertia container 1 of the present invention is as follows:

[0033] When the vehicle is running, the vibration of the wheel 4 will cause the input shaft 151 of the torsion bar inertia container and the inner housing 18 to generate a relative rotation torque; assuming that the number of gears of the first external gear 12 is Z1, the number of gears of the first internal gear 11 is Z2, the number of gears of the second external gear 14 is Z3, the number of gears of the second internal gear 13 is Z4, and the moment of inertia of the flywheel 16 is I;

[0034]

[0035] Among them, i 21 is the transmission ratio from the eccentric shaft input shaft to the inner housing when the flywheel is fixed, ω1 is the angular velocity of the inner housing, and ω2 is the angular velocity of the eccentric shaft input shaft;

[0036]

[0037] Among them, i 32 is the transmission ratio from the eccentric shaft input shaft to the flywheel when the inner housing is fixed, ω3 is the angular velocity of the flywheel; let i 21 =a, then i 21 +i 32 =1, so i 32 =1-a, where a is i 21 Assumed value;

[0038] From formula 1, we can get:

[0039] w2=aw1 Formula 3,

[0040] From formula 2, we can get:

[0041] w3=(1-a)w2 Formula 4,

[0042] After reasonable assumptions, the idealized inertial container device satisfies:

[0043]

[0044] Substituting equation 3 and equation 4 into the equation, we get:

[0045]

[0046]

[0047]

[0048]

[0049] Subtracting equation 5 from equation 6 yields:

[0050]

[0051]

[0052] So the torsional inertia coefficient is

[0053] b θ =a 2 I=(i 21 ) 2 I

[0054] Among them, b θ is the inertia coefficient, and τ is the torque of the torsion bar spring acting on the torsional inertia container.

[0055] The present invention achieves a wide frequency domain shock absorption effect by combining a torsion inertia container with a torsion spring, broadens the application scope of the inertia container, and the torsion inertia container structure uses two pairs of large and small planetary gears with few teeth in parallel structure transmission. When the internal gears are meshed, the curvature centers of the two teeth are in the same direction, and the curvature radii are approximately equal. During transmission, more than one pair of gears are meshed, and generally 3-9 pairs of gears are subjected to force at the same time, so a larger torque can be transmitted; the contact surface is large, and a short tooth system is generally used, and the meshing depth is shallower; the transmission ratio range is large, the transmission ratio is small, and the transmission efficiency is high; by reasonably using lubrication to reduce the sliding friction coefficient, a higher transmission efficiency can be obtained; therefore, during operation, if a larger load torque can be provided, and the meshing depth, transmission ratio, and sliding friction coefficient can be maintained at a relatively low level, the transmission efficiency is higher; ordinary gear machine tools and cutting tools can be used for part processing of the present invention, and the processing and assembly difficulty is lower, and the structure is relatively simple.

[0056] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. An integrated suspension device based on a torsion inertia container, comprising a torsion inertia container (1), a single trailing arm (2), a wheel hub motor (3), a wheel (4), a coupling (8), a motor (7), and a vehicle body (5), characterized in that: The torsion inertia container (1) is arranged in the vehicle body (5); a torsion bar spring (6) is further arranged between the motor (7) and the vehicle body (5); a connecting plate (9) is arranged on the side of the torsion inertia container (1) close to the vehicle body (5) for connecting the vehicle body (5) and the torsion inertia container (1); one end of the torsion bar spring (6) is connected to the rotating shaft of the motor (7) through a coupling (8); the other end of the torsion bar spring (6) is connected to the single longitudinal arm (2); the torsion inertia container (1) is connected to the single longitudinal arm (2); and the bottom of the single longitudinal arm (2) is fixedly connected to the wheel (4) and the wheel hub motor (3); Both ends of the torsion bar spring (6) are provided with splines; The connecting plate (9) is symmetrically arranged in the upper and lower parts, a spline a (19) is provided on the side of the torsion inertia container (1) close to the single longitudinal arm (2), the single longitudinal arm (2) comprises a connecting plate groove (21), an inner spline c (22), and an inner spline a (23) which are symmetrically arranged in the upper and lower parts, the connecting plate (9) passes through the connecting plate groove (21) to fix the vehicle body (5) and the torsion inertia container (1), the inner spline c (22) is spline-connected to the right end of the torsion bar spring (6), and the inner spline a (23) is connected to the spline a (19) of the torsion inertia container (1); The torsional inertia device (1) comprises an eccentric shaft (15), a first external gear (12) mounted on the eccentric shaft (15) via a ball bearing, a second external gear (14), a first internal gear (11) meshingly connected to the first external gear (12), a second internal gear (13) meshingly connected to the second external gear (14), a flywheel (16) arranged on a side of the eccentric shaft (15) away from a spline a (19), and a housing arranged on the eccentric shaft (15); the spline a (19) is arranged on a side of the eccentric shaft (15) close to a vehicle body (5).

2. The integrated suspension device based on a torsion inertia container according to claim 1, characterized in that: The coupling (8) comprises a coupling left end (82) and an internal spline b (81), wherein the coupling left end (82) is connected to the motor output shaft (155), and the internal spline b (81) is connected to the spline at the left end of the torsion bar spring (6).

3. The integrated suspension device based on a torsion inertia container according to claim 2, characterized in that: The eccentric shaft (15) comprises an input shaft (151), a left end (152) of an eccentric shaft coupling arranged on one side of the input shaft (151), a right end (153) of the eccentric shaft coupling arranged on the side of the left end (152) of the eccentric shaft coupling away from the input shaft (151), an intermediate shaft (156) arranged between the left end (152) of the eccentric shaft coupling and the right end (153) of the eccentric shaft coupling, and an output shaft (155) arranged on the side of the right end (153) of the eccentric shaft coupling away from the input shaft (151); the right end of the input shaft (151) is fixedly connected to the left end (152) of the eccentric shaft coupling, and the output shaft (155) is arranged on the side of the right end (153) of the eccentric shaft coupling away from the input shaft (151). The left end of the intermediate shaft (156) is fixedly connected to the left end (152) of the eccentric shaft coupling, the right end of the intermediate shaft (156) is fixedly connected to the right end (153) of the eccentric shaft coupling, the left end of the output shaft (155) is fixedly connected to the right end (153) of the eccentric shaft coupling, the first external gear (12) is mounted on the intermediate shaft (156) via a ball bearing, the second external gear (14) is connected to the output shaft (155) via a connecting ball bearing (154), the flywheel (16) is fixedly mounted on the output shaft (155), and the spline a (19) is arranged on the input shaft (151).

4. The integrated suspension device based on a torsion inertia container according to claim 3, characterized in that: The housing comprises an outer housing (17) and an inner housing (18); the inner housing (18) is connected to the first internal gear (11) and the second internal gear (13) by welding; one end of the inner housing (18) is mounted on the left end of the input shaft (151) by means of a ball bearing; the other end of the inner housing (18) is mounted on the output shaft (155) by means of a ball bearing; two ends of the outer housing (17) and two ends of the inner housing (18) are connected by means of ball bearings; the outer housing (17) is connected and fixed to the vehicle body (5) by means of a connecting plate (9) so as not to rotate.

5. The integrated suspension device based on a torsion inertia container (1) according to claim 1, characterized in that: The connecting plate (9) connects the vehicle body (5) and the torsional inertia container (1) by welding.

6. An integrated suspension device based on a torsional inertia container according to any one of claims 2 to 5, characterized in that: The connecting plate (9) is arranged in an inclined manner.

7. The integrated suspension device based on a torsion inertia container according to claim 6, characterized in that: The connecting plates (9) are symmetrically arranged up and down and are distributed in an eight-shaped shape.

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