WO2007032345A1

WO2007032345A1 - In-wheel motor system

Info

Publication number: WO2007032345A1
Application number: PCT/JP2006/318063
Authority: WO
Inventors: Hisashi Kurokawa; Yoshinari Nakamura
Original assignee: Kabushiki Kaisha Bridgestone; Kayaba Industry Co., Ltd.
Priority date: 2005-09-13
Filing date: 2006-09-12
Publication date: 2007-03-22

Abstract

An in-wheel motor system in which an in-wheel motor (3) is supported on a knuckle (5) as the underbody component of a vehicle through a damping mechanism having a direct-acting guide (12) with springs formed of a direct-acting guide (12A)and upper and lower spring members (12B, 12C) formed integrally with each other. The spring member (12B) disposed on the upper side of the direct-acting guide (12A) installed on a knuckle side plate (11) is formed in a square shape in cross section, its cross sectional area is increased to secure the spring constant of the upper side spring member (12B), and the numbers of turns of the spring members (12B, 12C) are increased to secure the durability of the spring members (12B, 12C). A rib member (20) with a cutout part (20k) is formed on the inner peripheral side of a non-rotating side case (3a), and upper and lower receiving members (14A, 14B) for guide receiving the rod (12b) of the direct-acting guide (12) with the springs and the rod (13b) of a second direct-acting guide (13) are disposed at the cutout part (20k) so that the stroke widths of the spring members (12B) and (12C) can be sufficiently secured.

Description

Specification

In-wheel motor system

Technical field

TECHNICAL FIELD [0001] The present invention relates to an in-wheel motor system used in a vehicle having a direct drive wheel as a driving wheel, and in particular, a configuration in which the motor is supported via a buffer mechanism with respect to a vehicle suspension part. The present invention relates to an in-wheel motor system. Background art

In recent years, an in-wheel motor system in which a motor is built in a wheel is being adopted in a vehicle driven by a motor such as an electric vehicle. Among them, an in-wheel motor system configured to elastically support an in-wheel motor 3 with respect to a vehicle undercarriage part via a buffer mechanism 50 as shown in FIG. 8 (for example, See Patent Document 1).

The in-wheel motor system includes a rotating side case 3b with a motor rotor 3R attached to a radially inner side, and a concentric arrangement with the motor case 3b, and a motor stator spaced apart from the motor rotor 3R by a predetermined distance. Fig. 9 shows the non-rotating side case 3a of the hollow direct drive motor 3 in which the non-rotating side case 3a with the 3S attached and open on the radially outer side is rotatably connected via a bearing ¾. As shown, the operation direction is limited in the vertical direction of the vehicle via the linear guide 51, and the upper panel member 52A, the lower panel member 52B, and the damper 53 operate in the vertical direction of the vehicle. It is connected to a knuckle 5, which is a vehicle undercarriage component connected to the axle 6, via a shock absorbing mechanism 50 having two plates 54, 55, and the rotating side case 3b and the wheel. An in-wheel motor system has been proposed in which two are coupled by a flexible coupling 60 that is a driving force transmission mechanism that can be eccentric to each other in the radial direction of the wheel 2. In FIG. 8, 1 is a tire attached to the wheel 2, 4 is a hub connected to the wheel 2 and its rotating shaft, 7 is a suspension member having a shock absorber and the like, and 8 is the hub. It is a braking device that also has the brake disc force attached to part 4. In this way, the in-wheel motor 3 is connected to the vehicle foot via the buffer mechanism 50 as described above. By adopting a structure that elastically supports the surrounding parts, the motor 3 is mounted floating on the undercarriage parts of the vehicle. Therefore, the motor 3 itself can act as a weight of the dynamic damper, and it can travel on rough roads. Both ground contact performance and ride center performance can be greatly improved.

Further, instead of the linear motion guide 51 and the panel members 52A and 52B, the linear bearing 12a and the rod 12b and the linear motion guide 12A which also has force as shown in FIG. A shock absorber mechanism 50A using a linear motion guide 12 with a panel 12 and 12C, and a second linear motion 12 arranged in parallel to the linear motion guide 12 with a panel as shown in FIG. An in-wheel motor system including a buffer mechanism 40B including a guide 13 has been proposed (see, for example, Patent Documents 2 and 3).

The shock absorbing mechanism 50A is connected to the motor side plate 54, the knuckle side plate 55, the above-mentioned linear motion guide 12 with the panel for connecting the plates 54, 55, the cylinder 15a, a piston (not shown), and the piston. In particular, the knuckle-side plate 55 is provided with fixing members 55m and 55η, and the linear bearing 12a and the damper 15 are fixed parts of the linear guide 12 with a panel. The cylinder 15a is fixed, and fixing members 54η and 54η are provided on the motor side plate 54 to fix the tip of the rod 12b, which is the movable part of the linear guide 12 with panel, and the tip of the shaft 15b of the damper 15. As a result, the structure of the shock absorber can be simplified and the number of parts can be reduced, so that productivity can be improved and the in-wheel motor can be reduced. Can be manufactured at a reasonable price.

Further, in the buffer mechanism 50B, two linear motion guides (the linear motion guide 12A and the second linear motion guide 13) for guiding the plates 54 and 55 in the vertical direction of the vehicle are provided. The rigidity can be further increased, and the motor can be more reliably float mounted on the undercarriage part of the vehicle. In FIG. 11, 54P, 54Q, and 54R are fixed members provided on the motor side plate 54, and the rods 12b and 13b, which are movable parts of the linear motion guide 12 with the panel and the second linear motion guide 13, are provided. A fixing member for fixing the tip and the tip of the shaft 15b of the damper 15, 55M and 55N are fixing portions for the paneled linear motion guide 12 and the second linear motion guide 13 provided on the knuckle side plate 55. Linear bearings 12a, 13a It is a fixing member that fixes the cylinder 15a, which is a fixing part of the damper 15, respectively. Patent Literature l: WO 02/083446 A1

Patent Document 2: JP 2005-178684 A

Patent Document 3: Japanese Patent Laid-Open No. 2005-289323

Disclosure of the invention

Problems to be solved by the invention

[0004] By the way, as the panel members 52A, 52B and the panel members 12B, 12C, coil springs are usually used. In the buffer mechanism 50, the upper panel members 52A, 52A force, the buffer mechanism 50A, In 50B, the panel member 12B on the upper side of the linear guide 12 with the panel supports the weight of the in-wheel motor 3. Therefore, the upper panel members 52A and 12B are required to have a higher panel constant than the lower panel members 52B and 12C.

In general, in order to improve the durability of the coiled panel member, there is a problem that the panel constant will decrease if the number of power required to increase the number of panel is increased. In order to secure the constant, it is necessary to increase the wire diameter. However, increasing the number of wires and expanding the wire diameter both reduce the stroke, so the upper panel members 52A and 12B, which require a high panel constant, ensure the required stroke and durability. In the above, it was difficult to obtain the necessary panel constant.

[0005] On the other hand, if the motor side plate 54 is omitted and the receiving members 54η, 54η of the panel direct acting guide 12 and the damper 15 are directly attached to the non-rotating side case 3a of the motor, the shock absorbing mechanism 50B For this purpose, if the motor side plate 54 is omitted, the rigidity of the motor cases 3a and 3b will decrease, so if the input from the road surface is large, the in-wheel motor 3 However, there is a problem that the driving force of motor 3 cannot be reliably transmitted to wheel 2.

Thus, as shown in FIG. 12, it is conceivable to reinforce the motor case by providing a hollow disk-shaped rib member 70 protruding radially inward on the inner peripheral side of the non-rotating side case 3a. When the receiving members 54η and 54η of the linear guide 12 are attached to the rib member 70, Since the travel distance of the rod 12b of the linear guide is shortened and the stroke width cannot be secured, there is a problem that the effect cannot be sufficiently obtained even if the knee constant is set high.

[0006] The present invention has been made in view of the conventional problems, and the durability of the panel member used for the buffer mechanism for elastically supporting the in-wheel motor by increasing the number of panel panels while ensuring the panel constant. It is an object of the present invention to provide an in-wheel motor system provided with a shock absorber mechanism that can secure sufficient performance and a sufficient stroke width.

Means for solving the problem

[0007] The invention described in claim 1 of the present application includes an annular motor rotor, a motor stator concentrically arranged at a predetermined interval with the motor rotor, and a non-rotating side to which the motor stator is attached. The panel has upper and lower panel members that extend in the vehicle vertical direction, one end connected to the knuckle side and the other end connected to the upper and lower sides of the non-rotating side case, respectively. In an in-wheel motor system provided with a shock absorbing mechanism that supports a rotating side case with respect to a knuckle that is an undercarriage part of a vehicle, a panel member having a square cross section as a panel member disposed on the upper side. It is characterized by using.

The invention described in claim 2 is the in-wheel motor system according to claim 1, wherein the buffer mechanism is configured such that the fixed portion of the linear guide is fixed to the knuckle side via the fixed member, and the tip of the movable portion Are attached to the upper and lower sides of the non-rotating side case via upper and lower receiving members, and a spring member is disposed between the fixing member and the upper and lower receiving members, respectively. In addition to the shock absorbing mechanism including the panel-equipped linear motion guide having the above-described configuration, the cross-sectional shape of the panel member disposed on the upper side is a square shape.

[0008] The invention described in claim 3 is the in-wheel motor system according to claim 2, wherein a hollow disk-shaped rib projecting radially inwardly on the inner peripheral side of the non-rotating side case. The rib member is provided with a notch, and the upper and lower receiving members are disposed in the notch.

The invention according to claim 4 is the in-wheel motor system according to claim 3, wherein the receiving member includes a receiving part that receives the panel member and the tip of the linear guide, and the receiving part is cut into the cutting part. The inner diameter of the non-rotating side case for mounting on both sides of the notch In addition to an arcuate mounting portion having substantially the same outer diameter, the mounting portion and the receiving portion are integrally formed.

[0009] The invention described in claim 5 is the in-wheel motor system according to any one of claims 1 to 4, wherein the buffer mechanism is fixed to the knuckle. The knuckle-side plate is provided with a protrusion protruding from one end of the plate in the vehicle front-rear direction toward the non-rotating side case, and on the inner peripheral side of the non-rotating side case, the upper surface of the protrusion A staggered bar is attached so as to face the lower surface and the lower surface, respectively, so as to regulate the maximum displacement amount of the buffer mechanism.

The invention described in claim 6 is the in-wheel motor system according to claim 5, wherein the buffer mechanism is a buffer mechanism including a panel-directed linear motion guide in which the linear motion guide and the panel member are integrally formed. A hollow disk-shaped rib member protruding inward in the radial direction of the inner peripheral side of the non-rotating side case, and fixing the upper and lower receiving portions of the paneled linear guide to the rib member, respectively. The protrusion is provided on a fixing member for fixing the panel-equipped linear motion guide to the knuckle side plate, and the above-mentioned stopper bars are attached to the upper and lower receiving portions, respectively.

The invention's effect

[0010] According to the present invention, the in-wheel motor is connected to a knuckle that is a vehicle undercarriage part.

Through a shock absorber mechanism having upper and lower panel members that extend in the vertical direction of the vehicle, with one end connected to the knuckle side and the other end connected to the upper and lower sides of the non-rotating side case, respectively. In the in-wheel motor system having the structure supported above, a panel member having a square cross section is used instead of a commonly used panel member having a round cross section as the panel member disposed on the upper side. Since the cross-sectional area is increased by using, it is possible to increase the number of powers while securing a desired spring constant. Therefore, since the durability of the upper panel member that supports the weight of the in-wheel motor can be sufficiently ensured, the durability of the in-wheel motor system can be improved.

[0011] In addition, the buffer mechanism is configured such that the fixed portion of the linear guide is fixed to the knuckle side via a fixed member, and the leading end of the movable portion is above and below the non-rotating side case. And is further interposed between the fixing member and the upper and lower receiving members, respectively. A motor is provided with a shock absorbing mechanism having a panel-equipped linear motion guide in which a panel member is arranged, and a hollow disk-shaped rib member protruding radially inward on the inner peripheral side of the non-rotating side case of the motor. If the case is reinforced, and the rib member is further provided with a notch, and the receiving member for receiving the stator side of the above-mentioned linear motion guide with panel is arranged at the notch, the buffer mechanism can be provided. A sufficient stroke width can be secured, and the above-described buffer mechanism that does not reduce the rigidity of the motor case can be further reduced in size and weight. At this time, the receiving member has a receiving portion for receiving the panel member and the tip of the linear guide, and an outer diameter substantially equal to the inner diameter of the non-rotating side case for attaching the receiving portion to both sides of the notch portion. If the mounting portion and the receiving portion are formed integrally with each other, the receiving member can be easily fitted into the notch portion. The property can be further improved.

[0012] Further, the knuckle side plate for fixing the buffer mechanism to the knuckle is provided with a protruding portion that protrudes from one end of the plate in the vehicle longitudinal direction toward the non-rotating side case. Because the non-rotating side case is provided with a staggered bar such as a rubber bush so as to face the upper surface and the lower surface of the protrusion, respectively, the maximum displacement amount of the buffer mechanism is regulated. With a simple configuration, the maximum displacement in the vertical direction of the buffer mechanism can be easily regulated while securing an axial space. As the shock absorber mechanism, a shock absorber mechanism having a direct acting guide with a panel in which a linear motion guide and a panel member are integrally formed is used, and a hollow projecting radially inward from the inner peripheral side force of the non-rotating side case. When a disk-shaped rib member is provided and the upper and lower receiving portions of the paneled linear guide are fixed to the rib member, the paneled linear guide is fixed to the knuckle side plate. If the protrusion is provided on the fixing member and the stopper rubber is attached to each of the upper and lower receiving parts, the motor side plate can be omitted, and the buffer mechanism can be reduced in size and weight. Can do.

Brief Description of Drawings

FIG. 1 is a diagram showing a configuration of a buffer mechanism according to the best mode of the present invention.

FIG. 2 is a perspective view showing a mounting state of the buffer mechanism according to the best mode.

FIG. 3 is a diagram showing a configuration of a rib member according to the best mode. FIG. 4 is a view showing a configuration of a guide receiving member according to the best mode.

FIG. 5 is a view showing a state where a guide receiving member is attached to a rib member.

FIG. 6 is a view showing a configuration of a stopper portion of the buffer mechanism according to the best mode.

FIG. 7 is a view showing another configuration of the guide receiving member according to the present invention.

FIG. 8 is a diagram showing a configuration of a conventional in-wheel motor.

FIG. 9 is a diagram showing a configuration of a conventional shock absorber.

FIG. 10 is a view showing a configuration of a buffer mechanism including a linear motion guide with a panel.

FIG. 11 is a view showing another configuration of the shock absorber provided with the panel-equipped linear motion guide.

FIG. 12 is a view showing a mounting state of a buffer mechanism provided with a panel-equipped linear guide.

Explanation of symbols

[0014] 3 in-wheel motor, 3a non-rotating side case, 3b rotating side case,

5 knuckle, 10 shock absorber, 11 knuckle side plate,

11m, l ln fixed member, 12 linear motion guide with panel, 12A linear motion guide,

12B Upper panel member, 12C Lower panel member, 12a Linear bearing,

12b P-pad, 13 2 ¾: Dynamic guide, 13a

13b Rod, 14A, 14B Guide receiving member, 14a Receiving part,

14b, 14c mounting part, 15 damper, 15a cylinder, 15b shaft,

16 Damper receiving member, 17 Protrusion, 18A, 18B Rubber bushing,

19 Stopper mechanism, 20 rib member, 20k notch.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode of the present invention will be described with reference to the drawings.

In the following description, portions common to the conventional example will be described using the same reference numerals.

FIG. 1 is a view showing a state in which a buffer mechanism 10 used in the in-wheel motor system according to the best mode is attached to the in-wheel motor 3, and FIG. 2 is a perspective view thereof. In each figure, 11 is a knuckle side plate that is connected to a knuckle 5 that is an undercarriage part of a vehicle that is connected to an axle (not shown), and 12 is a linear motion guide 12A that includes a linear bearing 12a and a rod 12b, and two panel members. A linear motion guide with a panel that is configured integrally with 12B and 12C. A second linear motion guide (see FIG. 2) having the same configuration as that of the linear motion guide 12A is arranged on the back side of the knuckle side plate 11 in the same figure in parallel with the linear motion guide 12 with the panel. . The linear bearing 12a, which is a fixed part of the linear motion guide 12 with the panel, and the linear bearing (not shown) of the second linear motion guide are fixed to a fixing member 11m attached to the knuckle plate 11, and the The rod 12b, which is the movable part of the linear guide 12, and the tip of the rod (not shown) of the second linear guide are not connected to the motor 3 via the upper and lower guide receiving members 14A, 14B. Each is attached to an annular rib member 20 projecting radially inward from the rotation side case 3a. Hereinafter, the panel member 12B arranged between the upper guide receiving member 14A and the fixing member lln is arranged between the upper panel member 12B and the fixing member 11m and the lower guide receiving member 14B. The panel member 12C thus formed is referred to as a lower panel member 12C. Reference numeral 15 denotes a single rod type damper comprising a cylinder 15a, a piston (not shown), and a shaft 15b connected to the piston. The cylinder 15a, one end of which is a fixing portion, is attached to a fixing member 12η attached to the knuckle side plate 11. The distal end portion of the shaft 15b, which is fixed and movable, is attached to the non-rotating side case 3a via the damper receiving member 16.

Reference numeral 17 denotes a protrusion projecting radially outward from the fixing member 11m for fixing the fixed portion of the paneled linear guide 12 and the second linear guide 13, and 18A and 18B are the upper and lower A hemispherical rubber bush mounted at positions corresponding to the upper and lower surfaces of the projections 17 of the guide receiving members 14A and 14B, and functions as a stopper bar. The protrusion 17 and the rubber bushes 18A and 18B constitute a stopper mechanism 19 to suppress the maximum displacement amount of the buffer mechanism 10 of the present invention.

Note that the knuckle 5 is omitted in FIG.

In this example, the cross-sectional area of the panel member 12B is increased by making the cross-sectional shape of the upper panel member 12B supporting the weight of the in-wheel motor square. Increasing the cross-sectional area of the panel reduces the panel shrinkage when a given load is applied, that is, increases the panel constant, so that the durability of the upper panel member 12B is improved. Furthermore, even if the number of panel members 12B is increased, a desired panel constant can be secured. Therefore, the durability of the buffer mechanism 10 can be sufficiently ensured. The durability of the two-wheel motor system can be improved.

For the lower panel member 12C that does not need to support the weight of the motor 3, use a coil spring with a normal round cross section.

Further, in this example, as shown in FIGS. 3 (a) and 3 (b), a hollow disk-like rib member 20 protruding radially inward is provided on the inner peripheral side of the non-rotating side case 3a of the motor. In addition to reinforcing the motor cases 3a and 3b, the rib member 20 is provided with notches 20k for disposing the upper and lower guide receiving members 14A and 14B, and the notches 20k are provided with the notches 20k. The receiving portions 14a and 14a of the guide receiving members 14A and 14B can be fitted respectively. In detail, the receiving members 14A and 14B are, as shown in FIGS. 4 (a) and 4 (b), a first hole for inserting and fixing the tip of the rod 12b of the linear motion guide 12 with a panel. 14p and a counterbore 14q for receiving the panel member 12B formed therearound, and a second hole 14r for inserting and fixing the tip of the rod 13b of the second linear guide 13 are formed. A receiving portion 14a, and an outer diameter substantially equal to the inner diameter of the non-rotating side case 3a, and arc-shaped mounting portions 14b and 14c for mounting the receiving portion 14a on both sides of the notch portion 20k. Therefore, a fastening member such as a bolt is inserted into the bolt hole 14m provided in the mounting portions 14b and 14c, and the receiving portion 14a is connected to the rib member from both sides of the notch portion 20k of the rib member 20. As shown in FIG. 5, the guide receiving member 14A (or the guide receiving member 14B) Is fixed to the rib member 20.

As described above, the receiving portions 14a and 14a of the guide receiving members 14A and 14B can be easily fitted into the notch 20k, so that not only the assemblability can be improved but also the rod of the linear guide Since the movement distance of 12b, 13b, that is, the operating range of the panel member 12B can be expanded, the stroke width of the shock absorbing mechanism 10 is sufficiently ensured as compared with the conventional mounting method shown in FIG. In addition, the effect of increasing the panel constant by making the cross-sectional shape of the upper panel member 12B square can be further exhibited.

[0018] By the way, in order to sufficiently secure the stroke width of the buffer mechanism 10, it is possible to install the paneled linear motion guide 12 on the side surface side of the non-rotating side case 3a of the motor. In this case, the paneled linear motion guide 12 is positioned outside the motor case (3a, 3b). Unbalanced load has occurred! / ... cannot function sufficiently as a shock absorber! ,When! This is a problem.

On the other hand, in the configuration of this example, since the linear motion guide 12 with a panel is arranged inside the motor case (3a, 3b), a sufficient stroke width can be secured and the motor load can be secured. Can be received uniformly.

FIG. 6 is a diagram showing details of the stopper mechanism 19. In this example, the stopper mechanism 19 protrudes from a fixing member 11 m that fixes a fixing portion between the panel-equipped linear guide 12 and the second linear guide 13. A protrusion 17 is provided, and hemispherical rubber bushes 18A and 18B are attached to the guide receiving members 14A and 14B so as to face the protrusion 17 so as to suppress the maximum displacement of the buffer mechanism 10. ing. As a result, even when a large vibration is input to the tire, the hemispherical rubber bushings 18A and 18B hit the protrusions 17, and the shock absorbing mechanism 10 is not displaced further downward. The clearance with the motor 3 can be kept below a predetermined value. Therefore, excessive deformation of the motor 3 can be suppressed and damage to the motor 3 can be prevented. The rubber bushes 18A and 18B are attached to, for example, a surface 14d corresponding to the protruding portion 17 of the mounting portion 14c on the protruding portion 17 side of the receiving members 14A and 14B shown in FIG. If the hole 14h is provided and fixed to this.

[0020] Thus, according to the best mode, the in-wheel motor 3 is connected to the knuckle 5 that is a vehicle undercarriage part with the linear motion guide 12A and the upper and lower panel members 12B and 12C. Fixing the linear guide 12A provided on the knuckle-side plate 11 in an in-wheel motor system configured to be supported via a buffer mechanism having a panel-equipped linear motion guide 12 configured integrally. By making the cross-sectional shape of the upper panel member 12B arranged on the upper side of the member 11m square and increasing its cross-sectional area, the desired panel constant can be obtained even if the number of the upper panel members 12B is increased. Since it can be secured, the durability of the upper panel member 12B that supports the weight of the in-wheel motor 3 can be secured, and the durability of the in-wheel motor system can be improved.

[0021] Further, a hollow disk-shaped rib member 20 protruding radially inward is provided on the inner peripheral side of the non-rotating side case 3a of the in-wheel motor 3, and a notch 20k is provided in the rib member 20. The rod 12b, which is the movable part of the panel direct acting guide 12, the panel member 12B and the second The upper and lower guide receiving members 14A and 14B that receive the rod 13b of the moving guide 13 are arranged in the notch 20k. Therefore, even if the motor side plate is omitted, the motor case (3a, 3b It is possible to secure a sufficient stroke width of the shock absorbing mechanism 10 without reducing the rigidity of). Therefore, the buffer mechanism can be further reduced in size and weight.

Further, the guide receiving members 14A and 14B are attached to the receiving portion 14a in which the cross-sectional shape of the non-rotating side case 3a is the cross-sectional shape of the notched portion 20k, and the receiving portion 14a is attached to both sides of the notched portion 20k. If the arcuate mounting portions 14b and 14c for the above are configured integrally and the receiving portion 14a is also attached to the rib member 20 with both side forces of the notch portion 20k of the rib member 20, Since the receiving members 14A and 14B can be easily fitted into the notch 20k, the assemblability can be improved.

[0022] Further, a protrusion 17 projects radially outward from the fixing member 11m for fixing the fixed portion of the paneled linear guide 12 and the second linear guide 13 so that the upper and lower guide receivers are provided. The stopper mechanism 19 is configured to suppress the maximum displacement amount of the buffer mechanism 10 by attaching hemispherical rubber bushings 18A and 18B to the positions corresponding to the upper surface and the lower surface of the protrusion 17 of the members 14A and 14B, respectively. In this way, the clearance between the wheel 2 and the motor 3 can be kept below a predetermined value, the excessive deformation of the motor 3 can be suppressed, and a sufficient space in the axial direction can be secured. it can.

[0023] It should be noted that in the best mode described above, the force described for the shock absorbing mechanism 10 provided with the panel-equipped linear motion guide 12, the second linear motion guide 13 and the damper 15 is shown in FIG. Needless to say, the present invention can also be applied to a conventional shock absorbing mechanism 50A having a panel-equipped linear motion guide 12 and a damper 15.

Further, in the conventional buffer mechanism 50 shown in FIGS. 8 and 9, the same effect can be obtained if the upper panel members 52A, 52A are square in cross section.

Further, the mounting structure of the buffer mechanism 10 can also be applied to the conventional buffer mechanism 50A having one linear motion guide. Specifically, as shown in FIG. 7 (a), the receiving portion 34a in which the first hole portion 14P and the counterbore portion 34q for receiving the panel member 12B formed therearound are formed, and the receiving portion 34a. A guide receiving member 34 having arcuate mounting portions 34b, 34b projecting from the portion 34a to both sides in the circumferential direction of the non-rotating side case 3a is attached to the rib member 20. What should I do! When the panel-equipped linear motion guide 12 is disposed on the knuckle side of the rib member 20, as shown in FIG. 7 (b), the receiving portion 34a is provided with a fitting portion 34m that protrudes toward the wheel side. If the provided guide receiving member 34Z is prepared, and the fitting portion 34m of the guide receiving member 34Z is fitted into the notch 20k of the rib member 20, the stroke width of the buffer mechanism 50A is increased. As well as improving assembly.

[0024] Further, in the above example, the force in which the protrusion 17 of the stopper mechanism 19 is provided on the fixing member 11m for fixing the fixing portion of the linear guide 12 with the panel and the second linear guide 13 knuckle side plate 11 force A protrusion that protrudes radially outward may be provided.

Further, instead of the stopper mechanism 19, hemispherical rubber bushes 18A and 18B are attached to the upper and lower surfaces of the protrusion 17, and the rubber bushes 18A and 18B of the upper and lower guide receiving members 14A and 14B are attached. The same effect can be obtained by using a stopper member having a structure in which each bar extending in the direction of the protrusion 17 is provided from a position opposed to the protrusion 17. Industrial applicability

As described above, according to the present invention, it is possible to ensure the durability of the panel member used in the shock absorbing mechanism that elastically supports the in-wheel motor with a simple configuration, and the durability of the in-wheel motor system. In addition to improving the performance, the stroke width of the buffer mechanism can be sufficiently secured without reducing the rigidity of the motor case even if the buffer mechanism is reduced in size and weight.

Claims

The scope of the claims

[1] An annular motor rotor, a motor stator concentrically arranged with the motor rotor at a predetermined interval, a non-rotating side case to which the motor stator is attached, one end connected to the knuckle side, The other end is connected to the upper side and the lower side of the non-rotating side case, and has upper and lower panel members extending in the vertical direction of the vehicle. The non-rotating side case is an undercarriage part of the vehicle. An in-wheel motor system including a shock absorbing mechanism for supporting a knuckle, wherein a panel member having a square cross section is used as the panel member disposed on the upper side. .

[2] In the buffer mechanism, the fixed part of the linear guide is fixed to the knuckle side via a fixing member, and the tip of the movable part is connected to the upper and lower sides of the non-rotating side case via the upper and lower receiving members. In addition, the shock absorber is provided with a panel-equipped linear motion guide having a panel member disposed between the fixing member and the upper and lower receiving members, and is disposed on the upper side. The in-wheel motor system according to claim 1, wherein the cross-sectional shape of the panel member is a square shape.

[3] A hollow disk-shaped rib member protruding radially inward is provided on the inner peripheral side of the non-rotating side case, and a notch is provided in the rib member so that the upper and lower receiving members are cut. The in-wheel motor system according to claim 2, wherein the in-wheel motor system is disposed in the notch.

[4] The receiving member is substantially equal to the inner diameter of the non-rotating side case for receiving the panel member and the receiving portion for receiving the tip of the linear guide and attaching the receiving portion to both sides of the notch. 4. The in-wheel motor system according to claim 3, wherein the in-wheel motor system is configured by an arcuate mounting portion having an outer diameter, and the mounting portion and the receiving portion are integrally formed.

[5] A knuckle-side plate for fixing the buffer mechanism to the knuckle is provided with a protrusion protruding from one end of the plate in the vehicle front-rear direction toward the non-rotating side case, and the non-rotating A staggered bar is attached to the inner peripheral side of the side case so as to face the upper surface and the lower surface of the protrusion, respectively, and the maximum displacement amount of the mechanism member is regulated. 1 to claim 4 Wheel motor system.

The shock absorbing mechanism is a shock absorbing mechanism having a direct acting guide with a panel in which a direct acting guide and a panel member are integrally formed, and a hollow disk-like shape protruding radially inward from the inner peripheral side of the non-rotating side case. A rib member is provided, and the upper and lower receiving portions of the paneled linear guide are fixed to the rib member, and the protrusion is provided on the fixing member for fixing the paneled linear guide to the knuckle side plate. 6. The in-wheel motor system according to claim 5, wherein the stopper rubber is attached to each of the upper and lower receiving portions.