阅读说明：本技术 车辆用轮毂 (Vehicle hub ) 是由 神山洋一 斋藤寿信 大沢悠佑 于 2019-07-04 设计创作，主要内容包括：本发明提供一种车辆用轮毂,其具有与以往相比能够确保副气室的容积更大的亥姆霍兹共振器(副气室部件)。本发明的车辆用轮毂(1)的特征在于,作为亥姆霍兹共振器的副气室部件(10)包括：主体部(13),其利用由底板(25b)、上板(25a)和一对侧板(25c)包围的空间形成副气室(SC),其中,该底板与凹下部(11c)的外周面(11d)邻接并沿轮毂宽度方向(Y)延伸,该上板在所述底板的轮毂径向(Z)的外侧与所述底板隔开规定间隔相对,该一对侧板从所述底板的轮毂宽度方向的两端朝向轮毂径向的外侧立起；以及一对缘部(14),其从所述底板与一对所述侧板的各接合部(19)朝向轮毂宽度方向的外侧延伸,并卡定于所述凹下部。(The invention provides a vehicle hub, which has a Helmholtz resonator (an auxiliary air chamber component) capable of ensuring larger volume of an auxiliary air chamber compared with the prior art. A vehicle hub (1) according to the present invention is characterized in that an auxiliary air chamber member (10) as a Helmholtz resonator includes: a main body (13) that forms a sub-air chamber (SC) by a space surrounded by a bottom plate (25b) that is adjacent to an outer peripheral surface (11d) of a recessed portion (11c) and extends in a hub width direction (Y), an upper plate (25a) that faces the bottom plate at a predetermined interval on the outside in a hub radial direction (Z) of the bottom plate, and a pair of side plates (25c) that rise from both ends of the bottom plate in the hub width direction toward the outside in the hub radial direction; and a pair of edge portions (14) that extend outward in the hub width direction from the respective joint portions (19) of the bottom plate and the pair of side plates, and that are locked to the recessed portions.)

1. A vehicle hub in which an auxiliary air chamber member as a Helmholtz resonator is attached to an outer peripheral surface of a recessed portion,

the sub plenum member includes:

a main body portion that forms a sub-air chamber by a space surrounded by a bottom plate that is adjacent to the outer peripheral surface of the recessed portion and extends in the hub width direction, an upper plate that faces the bottom plate at a predetermined interval on the outer side in the hub width direction of the bottom plate, and a pair of side plates that rise from both ends in the hub width direction of the bottom plate toward the outer side in the hub width direction; and

and a pair of edges extending outward in the hub width direction from each joint between the bottom plate and the pair of side plates and locked to the recessed portion.

2. A hub for a vehicle according to claim 1,

the extending ends of the pair of edge portions are fitted into and engaged with the groove portion formed in the recessed portion.

Technical Field

The present invention relates to a vehicle hub.

Background

Conventionally, a hub is known in which a helmholtz resonator (sub-air chamber member) for canceling air column resonance in a tire air chamber is attached to an outer peripheral surface of a recessed portion (see, for example, patent document 1). The auxiliary air chamber component of the hub comprises: a main body part having an auxiliary air chamber inside and formed long in the circumferential direction of the hub; and a pair of plate-like edge portions extending in the hub width direction from both sides thereof over substantially the entire length of the main body in the longitudinal direction. The extending distal ends of the edge portions are fitted into the groove portions formed in the recessed portion, and the sub-air chamber member is attached to the recessed portion.

In addition, the sub air chamber member of the conventional hub is curved with a predetermined curvature so as to bulge toward the outer peripheral surface side of the concave portion from the bottom plate constituting the main body to the pair of edge portions. In such a hub, when a centrifugal force acts on the sub air chamber member during rotation of the hub, the shape of the bulge on the outer circumferential surface tends to be reversed in the direction of the reverse bulge. However, the operation of the sub-chamber member to be reversed is an operation in which the edge portion protrudes toward the groove portion, and the fitting force of the edge portion with respect to the groove portion is further improved. That is, according to this hub, the larger the centrifugal force to peel off the sub air chamber member from the recessed portion, the higher the holding force of the sub air chamber member with respect to the recessed portion.

Disclosure of Invention

However, the conventional hub (see, for example, patent document 1) has a problem that the size of the body in the hub width direction is limited by the extended edge portion. Therefore, the conventional hub has a problem that the volume of the sub air chamber formed in the main body cannot be secured to be large. Therefore, it is desired to provide a helmholtz resonator (sub-chamber member) having excellent noise cancellation performance while ensuring a larger sub-chamber volume in a conventional hub.

The present invention addresses the problem of providing a vehicle hub that has a Helmholtz resonator (sub-air-chamber component) that can ensure a larger volume of a sub-air chamber than in the past.

The present invention for solving the above-described problems is a vehicle hub in which an auxiliary air chamber member as a helmholtz resonator is attached to an outer peripheral surface of a recessed portion, the auxiliary air chamber member including: a main body portion that forms a sub-air chamber by a space surrounded by a bottom plate that is adjacent to the outer peripheral surface of the recessed portion and extends in the hub width direction, an upper plate that faces the bottom plate at a predetermined interval on the outer side in the hub width direction of the bottom plate, and a pair of side plates that rise from both ends in the hub width direction of the bottom plate toward the outer side in the hub width direction; and a pair of edges extending from each joint portion between the bottom plate and the pair of side plates in the width direction of the hub and locked to the recessed portion.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, it is possible to provide a vehicle hub having a helmholtz resonator (sub-chamber member) capable of ensuring a larger volume of a sub-chamber than in the related art.

Drawings

Fig. 1 is a perspective view of a vehicle hub according to an embodiment of the present invention.

Fig. 2 is an overall perspective view of the sub air chamber member.

Fig. 3 is a sectional view III-III of fig. 1.

Fig. 4 (a), 4 (b), and 4 (c) are explanatory views of a process of attaching the sub air chamber member to the depressed portion.

Fig. 5 (a) is a schematic view for explaining the operational effects of the vehicle hub according to the embodiment of the present invention, and (b) is a schematic view of the vehicle hub as a reference example.

Description of the reference numerals

Vehicle hub

9 tire air chamber

10 subsidiary air chamber parts

11 wheel rim

11c concave part

11d outer peripheral surface

13 main body part

14 edge part

15a rising part

15b bulge

17 groove part

18 pipe body

18a communication hole

19 joint part

25a upper plate

25b bottom plate

25c side plate

33 bridge part

33a upper side joint part

33b lower side joint part

50 push rod

E edge part

SC auxiliary air chamber

X wheel hub circumference

Y-wheel hub width direction

Z wheel hub radial

Detailed Description

Next, a vehicle hub according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the drawings referred to, X represents a hub circumferential direction, Y represents a hub width direction, and Z represents a hub radial direction. In addition, in the hub width direction Y, the center side of the outer peripheral surface of the depressed portion in the hub may be referred to as "inner side in the hub width direction Y", and the rim flange side in the hub may be referred to as "outer side in the hub width direction Y".

The entire structure of the vehicle hub will be described, and the sub-chamber member as a helmholtz resonator will be described later.

< integral construction of vehicle hub >

Fig. 1 is a perspective view of a vehicle hub 1 according to an embodiment of the present invention.

As shown in fig. 1, a vehicle hub 1 according to the present embodiment is configured by attaching a sub-air chamber member 10 (helmholtz resonator) made of synthetic resin such as polypropylene or polyamide to a rim 11 made of metal such as aluminum alloy or magnesium alloy.

In fig. 1, reference numeral 12 denotes a disc portion for connecting the rim 11 to a hub, not shown.

The rim 11 includes a recessed portion 11c recessed toward the hub axial side in the hub radial direction between bead seats, not shown, formed at both ends in the hub width direction Y. The outer peripheral surface 11d of the recessed portion 11c defined by the bottom surface of the recessed portion has substantially the same diameter about the hub axle in the hub width direction Y.

The rim 11 in the present embodiment includes: an upright portion 15a that is upright from the outer peripheral surface 11d of the recessed portion 11c toward the rim flange side on one side in the hub width direction Y; and a raised portion 15b that is raised toward the outside in the hub radial direction at the middle portion in the hub width direction Y in the outer peripheral surface 11 d.

The rising portion 15a and the raised portion 15b extend annularly in the hub circumferential direction X.

< sub-air chamber Member >

The sub air chamber member 10 will be explained next.

Fig. 2 is an overall perspective view of the sub air chamber member 10. Fig. 3 is a sectional view III-III of fig. 1.

As shown in fig. 2, the sub air chamber member 10 is a member that is long in one direction, and includes a main body 13, a pipe 18, and a rim 14. The sub air chamber member 10 is formed to have a symmetrical shape in the hub circumferential direction X, with a partition wall 16 extending in the hub width direction Y at the center of the main body 13 as a boundary.

The main body portion 13 is curved in the longitudinal direction thereof. That is, the main body portion 13 is along the hub circumferential direction X when the sub air chamber member 10 is attached to the outer circumferential surface 11d (see fig. 1) of the recessed portion 11c (see fig. 1). The main body 13 is hollow inside. The hollow portion (not shown) forms a sub-chamber SC (see fig. 3) described later. The hollow portion is divided into two portions in the hub circumferential direction X by a partition wall 16.

As shown in fig. 3, the main body portion 13 has a substantially rectangular shape elongated in the hub width direction Y when viewed in a cross-section orthogonal to the longitudinal direction (see the hub circumferential direction X in fig. 2).

Specifically, the main body portion 13 includes: a bottom plate 25b adjacent to the outer peripheral surface 11d of the recessed portion 11c and extending in the hub width direction Y; an upper plate 25a disposed on the outer circumferential surface 11d so as to face the bottom plate 25 b; and a pair of side plates 25c rising from both ends of the bottom plate 25b in the hub width direction Y and joined to the upper plate 25 a.

The bottom plate 25b is formed of a plate body extending substantially flat in the hub width direction Y. Such a bottom plate 25b is formed so as to be curved in the hub circumferential direction X (see fig. 1) with substantially the same curvature as the outer circumferential surface 11 d.

The upper plate 25a is curved with a predetermined curvature in the hub circumferential direction X (see fig. 1) so as to face the bottom plate 25b at a predetermined interval.

The side plate 25c is formed to rise substantially perpendicularly to the outer peripheral surface 11d of the recessed portion 11c from the bottom plate 25b to the outside in the hub radial direction Z.

The upper plate 25a, the bottom plate 25b, and the side plate 25c surround the main body 13 to form a sub-air chamber SC.

As shown in fig. 2, the main body portion 13 is formed such that the plurality of bridge portions 33 are arranged at equal intervals in the hub circumferential direction X. Further, the bridge portions 33 are arranged in two rows in the hub width direction Y.

As shown in fig. 3, the bridge portion 33 is formed by joining an upper joining portion 33a and a lower joining portion 33b at a substantially central position between the upper plate 25a and the lower plate 25 b.

The upper coupling portion 33a is formed so that the upper plate 25a is partially recessed toward the bottom plate 25 b. The lower coupling portion 33b is formed such that the bottom plate 25b is partially recessed toward the upper plate 25 a.

Such a bridge portion 33 has a substantially cylindrical shape, and partially connects the upper plate 25a and the lower plate 25 b. The bridge portion 33 is formed with a circular opening in a plan view at each corresponding position in the vertical direction of the main body portion 13.

Next, the pipe 18 (see fig. 1) will be described.

As shown in fig. 1, the pipe body 18 is formed so as to protrude from the main body 13 in the hub circumferential direction X at a position offset to one side in the hub width direction Y in the main body 13.

As described above, the sub air chamber member 10 in the present embodiment has a shape symmetrical in the hub circumferential direction X with respect to the partition wall 16 as a boundary. Therefore, although only one pipe 18 is shown in fig. 1, the pipe 18 in the present embodiment is disposed so as to be paired with each other at positions symmetrical to each other at both ends in the longitudinal direction (hub circumferential direction X) of the main body 13. Incidentally, the pair of tubes 18 in the present embodiment are arranged at positions spaced apart from each other by approximately 90 ° about the hub axle.

As shown in fig. 2, a communication hole 18a is formed inside the pipe 18.

Further, the communication hole 18a extends from the inside of the tube 18 into the main body 13. The communication hole 18a extending in the body 13 is formed by partially dividing the hollow portion of the body 13 by the partition wall 62. Incidentally, the partition wall 62 in the present embodiment is formed by a concave portion 60 formed by being recessed from the upper plate 25a side toward the bottom plate 25b side and a concave portion 64 formed by being recessed from the bottom plate 25b side toward the upper plate 25a side.

The communication hole 18a communicates the sub air chamber SC (see fig. 3) formed inside the body 13 with the tire air chamber 9 (see fig. 3) formed above the depressed portion 11c (see fig. 3) and between the tire and a tire (not shown).

Next, the edge portion 14 (see fig. 3) will be described.

As shown in fig. 3, the rim 14 is formed of a plate body extending outward in the hub width direction from both ends of the bottom plate 25b in the hub width direction Y.

In other words, the edge 14 extends from the joint 19 between the bottom plate 25b and the side plate 25c in the extending direction of the bottom plate 25 b. That is, the edge 14 extends substantially parallel to the outer peripheral surface 11d of the recessed portion 11 c.

The thickness of the rim 14 in the present embodiment is set to be substantially the same as the thickness of the upper plate 25a, the bottom plate 25b, and the side plate 25 c. The rim 14 can be elastically deformed by appropriately selecting the thickness and/or material.

The extending tip of the rim 14 is fitted into the groove 17 formed in each of the rising portion 15a and the rising portion 15 b.

Incidentally, the groove portions 17 are opened at the sides of the rising portions 15a and the raised portions 15b which face each other. The opening width of the groove 17 in the present embodiment is set to a width obtained by adding the thickness of the bottom plate 25b to a space CL equal to the displacement width of the rim 14 when the rim 14 is fitted into the groove 17 in the step of mounting the sub air chamber member 10 to the recessed portion 11c (see fig. 4) described later. The distance CL in the present embodiment is a height from the outer peripheral surface 11d of the recessed portion 11c to the lower portion of the edge portion 14, and is assumed to be about 0.5mm to 1.0mm, but is not limited thereto.

The extending ends of the edge portions 14 are fitted and locked in the groove portions 17 on the extension line of the bottom plate 25b in the hub width direction Y.

The sub air chamber member 10 of the present embodiment described above is assumed to be a resin molded product, but is not limited thereto, and may be formed of another material such as metal. In the case of a resin, a light-weight and high-rigidity blow-moldable resin is preferable in view of its light weight, improvement in mass productivity, reduction in manufacturing cost, securing of airtightness of the sub-air chamber SC, and the like. Polypropylene, polyamide and the like are particularly preferable.

< method for mounting sub-chamber Member >

Next, a method of attaching the sub air chamber member 10 to the depressed portion 11c will be described. Fig. 4 (a), 4 (b) and 4 (c) are process explanatory views for explaining a method of attaching the sub air chamber member 10 to the depressed portion 11 c.

As shown in fig. 4 (a), in the method of mounting the sub air chamber member 10, a plunger (pressing means) 50 for pressing the sub air chamber member 10 against the outer peripheral surface 11d of the recessed portion 11c is assumed to be used.

The push rod 50 may be configured to generate a pressing force by the air pressure of an air cylinder, for example.

In fig. 4 (a) to 4 (c), the push rod 50 is shown by a phantom line (two-dot chain line) for convenience of drawing.

The push rod 50 used in the present embodiment may be, for example, a plate-like member having an edge portion having a contour in the shape of an arc having the same curvature as the curvature in the longitudinal direction of the sub air chamber member 10 (see the hub circumferential direction X in fig. 2). The push rod 50 to which the present invention is applicable is not limited to this, and design changes can be appropriately made.

In this mounting method, as shown in fig. 4 (a), first, the sub air chamber member 10 is inclined so that the rim portion 14 fits into the groove portion 17 of the bulge portion 15 b.

Then, the push rod 50 presses the edge 14 on the opposite side of the edge 14 into which the groove 17 is fitted, and applies a load in the direction of the outlined arrow.

As a result, the sub air chamber member 10 approaches the outer peripheral surface 11d of the depressed portion 11c as shown in fig. 4 (b). The rim 14 pressed by the push rod 50 abuts against the rim E formed directly above the groove 17 of the rising portion 15 a. The edge portion 14 is deflected by the reaction force received from the edge portion E.

Next, as shown in fig. 4 (c), the bottom plate 25b of the main body 13 is disposed adjacent to the outer peripheral surface 11d of the recessed portion 11c by fitting the rim portion 14 into the groove portion 17 of the rising portion 15a by the push rod 50, and the series of steps of the mounting method is completed.

Next, the operational effects of the vehicle hub 1 according to the present embodiment will be described.

Fig. 5 (a) is a schematic diagram for explaining the operational effects of the vehicle hub 1 according to the embodiment of the present invention, and fig. 5 (b) is a schematic diagram of the vehicle hub 101 as a reference example.

First, the structure of the hub 101 as a reference example will be described.

As shown in fig. 5 (b), the sub air chamber member 110 of the hub 101 as a reference example includes a main body portion 113 and a pair of edge portions 114 formed of plate bodies extending from the main body portion 113 in the hub width direction Y. The extending tip of the rim 114 is fitted into and engaged with a groove 117 formed in the recessed portion 11 c.

The sub air chamber member 110 in the reference example is curved with a predetermined curvature so as to bulge toward the outer peripheral surface 11d of the recessed portion 11c from the bottom plate 125b constituting the main body portion 113 to the pair of edge portions 114. In such a hub 101, when a centrifugal force F acts on the sub air chamber member 110 during rotation of the hub, the shape bulging toward the outer peripheral surface tends to be reversed in the direction of the reverse bulging.

The operation of reversing the sub air chamber member 110 is an operation of projecting the edge portion 114 to the groove portion 117, and the fitting force of the edge portion 114 to the groove portion 117 is further improved. That is, according to the hub 101, the larger the centrifugal force F to peel the sub air chamber member 110 from the depressed portion 11c, the higher the holding force of the sub air chamber member 110 with respect to the depressed portion 11 c.

However, in the hub 101, the size of the body portion 113 in the hub width direction Y is limited by the extended edge portion 114. Therefore, the volume of the sub air chamber SC formed in the main body portion 113 of the hub 101 is also limited.

In contrast, in the sub air chamber member 10 of the vehicle hub 1 according to the present embodiment, as shown in fig. 5 (a), the bottom plate 25b is adjacent to the outer peripheral surface 11d of the recessed portion 11c and extends in the hub width direction. The edge 14 extends outward in the hub width direction Y from the joint 19 between the bottom plate 25b and the side plate 25c and is locked to the recessed portion 11 c.

According to the vehicle hub 1, the bottom plate 25b extends adjacent to the outer peripheral surface 11d, and therefore, unlike the sub-chamber member 110 (see fig. 5b) having the curved bottom plate 125b (see fig. 5b) in the reference example, a large volume of the sub-chamber SC can be ensured.

The vehicle hub 1 including the sub-chamber member 10 has more excellent noise reduction performance for road noise.

In the vehicle hub 1, the rim portion 14 extends outward in the hub width direction Y from the joint portion 19 between the bottom plate 25b and the side plate 25c, and extends along the outer peripheral surface 11d of the recessed portion 11c and along the groove portions 17 of the rising portion 15a and the raised portion 15 b.

That is, the extending length of the edge portion 14 extending linearly toward the groove portion 17 in the present embodiment can be set shorter than that of the edge portion 114 (see fig. 5b) extending while being bent toward the groove portion 117 (see fig. 5b) in the reference example.

Thus, the edge portion 14 in the present embodiment can reduce the amount of deflection when the centrifugal force F acts on the sub air chamber member 10.

Therefore, according to the vehicle hub 1, the holding force of the sub air chamber member 10 with respect to the recessed portion 11c when receiving the centrifugal force F can be improved.

Further, by shortening the extension length of the setting edge portion 14 (see fig. 5a), the vehicle hub 1 (see fig. 5a) can dispose the side plate 25c close to the rising portion 15a and the raised portion 15b, respectively. This can increase the volume of the sub air chamber SC (see fig. 5a) in the vehicle hub 1.

In the vehicle hub 1 of the present embodiment, the extending ends of the pair of edge portions 14 are fitted into and engaged with the groove portions 17 formed in the recessed portion 11 c.

According to such a vehicle hub 1, the holding force of the sub air chamber member 10 with respect to the recessed portion 11c when receiving the centrifugal force F can be further improved.

Further, the edge portion 14 of the sub air chamber member 10 can be set short as described above, and even the groove portion 17 provided on the extension line of the outer peripheral surface 11d of the recessed portion 11c can be fitted with a slight amount of flexure. That is, according to the vehicle hub 1, the structure in which the bottom plate 25b and the outer peripheral surface 11d are adjacent to each other can be formed more easily and reliably.

The present embodiment has been described above, but the present invention is not limited to the above embodiment and can be implemented in various ways.

In the above embodiment, the vehicle hub 1 in which the outer peripheral surface 11d of the recessed portion 11c has substantially the same diameter about the hub axis in the hub width direction Y has been described, but the present invention may be configured such that the diameter of the outer peripheral surface 11d varies in the hub width direction Y. That is, the vehicle hub 1 may have a structure in which the outer peripheral surface 11d is inclined and/or partially curved with respect to the hub axis when viewed in a cross-section intersecting the hub circumferential direction X, as long as the bottom plate 25b is formed along the outer peripheral surface 11 d.