JP5802961B2 - Dodion rear suspension - Google Patents

Description

  The present invention relates to a dodion type rear suspension in which a hub bearing is detachable from the inside of a vehicle.

  Conventionally, a dodion-type rear suspension as disclosed in Patent Document 1 below has been provided. The dodion type rear suspension includes an axle beam that supports the left and right wheels at the rear end of the vehicle, and a drive shaft that transmits driving force to the wheels. A hub that rotates integrally with the wheel is inserted into the carrier provided at the end of the axle beam. The hub is rotatably supported by a hub bearing fixed to the carrier.

  In many of the dodion-type rear suspensions provided in the prior art, the hub bearing is fixed to the carrier by using a fixing tool such as a bolt inserted from the outside of the vehicle. Further, a member such as a rear brake is arranged in the vicinity of the hub bearing.

JP 2000-25440 A

  Here, as described above, when the hub bearing is fixed by a bolt inserted from the outside of the vehicle, the hub bearing or the fixture and other structures such as a rear brake arranged in the vicinity thereof (others) Interference with the member) becomes a problem. Therefore, in the prior art, in order to avoid interference between the hub bearing and the fixture and other members, measures such as enlargement of the other members such as the rear brake must be taken, which imposes restrictions on device design. Such problems may occur.

  On the other hand, in order to avoid problems such as restrictions on the device design described above, a method of fixing the hub bearing by attaching a fixing tool such as a bolt to the carrier from the inside of the vehicle can be considered. However, in order to make the hub bearing detachable from the inside of the vehicle, it is necessary to provide an opening for attachment / detachment on a side surface (hereinafter also referred to as “inside side surface”) of the carrier located on the inside of the vehicle. The opening for attachment / detachment needs to have a size that allows at least a fixture, a tool, or the like to be inserted, and the opening area must be large.

  When a large opening for attachment / detachment is provided as described above, the strength of the carrier against the load in the vertical direction is reduced. On the other hand, since the top surface of the carrier is a portion of a spring interposed between the vehicle body and the vehicle, a large load is applied to the carrier in the vertical direction when the vehicle bumps or the like. Is assumed. Therefore, in order to make the bubb bearing detachable from the inside of the vehicle, it is necessary to take measures so that the carrier is not deformed even when a large load is applied in the vertical direction due to the influence of the bump or the like.

  Accordingly, an object of the present invention is to provide a dodion-type rear suspension in which a hub bearing can be attached and detached from the inside of a vehicle and the carrier has sufficient strength against an impact in the vertical direction.

The dodion type rear suspension of the present invention provided to solve the above-described problems includes an axle beam that supports left and right wheels at a rear end of a vehicle, a carrier provided at an end of the axle beam, A hub that is provided at an end and rotates integrally with a wheel; and a hub bearing that rotatably supports the hub, wherein the hub bearing is fixed to the carrier from the inside of the vehicle. inward side located on the vehicle inner side, wherein is detachable opening is formed to allow mounting and dismounting of the hub bearing, have a connecting member connecting the career to the detachable opening, the connecting A part of the member is arranged so as to extend in the vertical direction, and the upper part and the lower part of the part are fixed to the upper part and the lower part of the carrier. The connecting member by is characterized in that configured as struts of the carrier.

  In the dodion type rear suspension of the present invention, an opening for attachment / detachment that is large enough to attach / detach the hub bearing is formed on the inner side surface of the carrier. However, in the present invention, the upper part and the lower part of the carrier are connected to the attaching / detaching opening by the connecting member and reinforced. As a result, the carrier is reinforced against the impact in the vertical direction at the site on the inner side surface side. Therefore, according to the present invention, it is possible to provide a dodion type rear suspension capable of attaching and detaching the hub bearing from the inside of the vehicle.

  Further, as described above, since the hub bearing can be fixed by the fixing member inserted from the inside of the vehicle, interference with other members provided at positions adjacent to the hub bearing can be avoided. Specifically, when the rear brake is provided at a position adjacent to the hub bearing as described above, interference with the rear brake can be prevented. As a result, the degree of freedom in designing the size and installation space of the other members adjacent to the hub bearing is increased, and for example, the other members such as the rear brake can have a compact configuration.

  According to the present invention, it is possible to provide a dodion-type rear suspension in which the hub bearing can be detached from the inside of the vehicle, and the carrier has sufficient strength against an impact in the vertical direction. As a result, it is possible to reduce the size of other members such as a rear brake provided at a position adjacent to the hub bearing, or to improve the degree of design freedom, and to reduce the weight of the vehicle.

(A) is a top view which shows the state which looked at the rear suspension which concerns on one Embodiment of this invention from the vehicle upper side, (b) is a side view which shows the state which looked at the rear suspension of (a) from the vehicle rear side. is there. It is a front view which shows the structure of the carrier vicinity which comprises the rear suspension of this invention, (a) shows the state before attachment of a connection part, (b) shows the state after attachment of a connection part. It is a perspective view which shows a connection part. It is AA sectional drawing of Fig.2 (a).

  Next, the rear suspension 10 according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the rear suspension 10 of this embodiment is characterized by the structure in the vicinity of the carrier 30. The structure of the rear suspension 10 will be outlined prior to the description of the structure.

  The rear suspension 10 is a so-called dodion suspension and is disposed at the rear end of the vehicle. As shown in FIG. 1, the rear suspension 10 includes an axle beam 12 and a drive shaft 14 provided separately from the axle beam 12.

  The axle beam 12 is provided to support the wheel. As shown in FIGS. 1A and 1B, the axle beam 12 has both ends 18 substantially straight, but has a curved portion 20 that is curved with respect to both ends 18 at a substantially central portion in the axial direction. The axle beam 12 is disposed on the vehicle rear end side with respect to the axial position of the drive shaft 14 and below the drive shaft 14. The axle beam 12 is attached such that both end portions 18 are substantially parallel to the axial direction of the drive shaft 14 and the curved portion 20 bulges toward the vehicle rear side. Thereby, the axle beam 12 is installed without interfering with the differential device 22. In the present embodiment, in order to avoid interference with the differential device 22, the configuration in which the curved portion 20 curved toward the rear of the vehicle is provided at the longitudinal intermediate portion of the axle beam 12 is illustrated. Or the curved portion 20 may be curved in the vehicle forward direction.

  The drive shaft 14 is for transmitting driving force to the left and right wheels (rear wheels). As shown in FIG. 5, a hub 50 is provided at the end 18 of the carrier 30 which will be described in detail later. A hub bearing 60 is attached to the outer periphery of the hub 50. As a result, the hub 50 is rotatably supported by the hub bearing 60. Further, rear brake components (not shown) such as wheel cylinders, brake shoes, and return springs are disposed in the vicinity of the hub bearing 60.

  As shown in FIG. 2 or FIG. 5, the hub bearing 60 is fixed to the carrier 30 provided at both ends of the axle beam 12 by bolts 52 (fixing members) inserted from the vehicle inner side toward the outer side. Yes. Specifically, the carrier 30 is a member having a box-like appearance formed by bending a steel plate or the like, and is provided at a position adjacent to the vehicle drum side with respect to the brake drum 24. The carrier 30 has a top surface 32 facing the vehicle main body located on the upper side with respect to the rear suspension 10 and an inner side surface 34 facing the vehicle inner side. Further, the carrier 30 has a reinforcing structure 36 on the inner side surface 34 side.

  On the top surface 32, a mounting seat 38 used for mounting the spring 16 disposed between the top surface 32 and the vehicle body is formed. Therefore, an impact in a substantially vertical direction (vertical direction) acts on the carrier 30 with respect to the top surface 32 along with the bumps of the vehicle. In addition, an opening 40 for attachment / detachment is formed on the inner side surface 34. The opening 40 for attaching / detaching has an opening area large enough to insert and remove the bolt 52 and insert a tool for attaching / detaching the bolt 52 when the hub bearing 60 is attached / detached to / from the carrier 30 by the bolt 52. Have.

  The reinforcing structure portion 36 has a function of compensating for a decrease in strength in the vertical direction of the carrier 30 due to the provision of the detachable opening 40 on the inner side surface 34 forming the carrier 30. As shown in FIG. 2, the reinforcing structure portion 36 includes an upper projecting portion 42 and a lower projecting portion 44, and a connecting portion 46 (connecting member) provided so as to connect the two projecting portions 42 and 44 vertically. ) And the main part.

  The upward projecting portion 42 is configured by a portion (hereinafter also referred to as “upward projecting portion 42”) of the top surface 32 forming the carrier 30 that projects toward the vehicle inner side from the inner side surface 34. Therefore, the upper overhanging portion 42 is located above the attachment / detachment opening 40.

  On the other hand, the lower overhanging portion 44 is installed so as to face the upper overhanging portion 42 in a state substantially parallel to the lower portion with respect to the attaching / detaching opening 40. Similar to the upper overhanging portion 42, the lower overhanging portion 44 is provided so as to overhang from the inner side surface 34 of the carrier 30 toward the vehicle inner side. In the present embodiment, the downward projecting portion 44 is cantilevered by welding or the like at the end of the axle beam 12 in which a plate body made of a steel plate having a substantially rectangular shape in plan view is arranged substantially parallel to the drive shaft 14. It is formed by fixing so that.

  As shown in FIG. 3, the connecting portion 46 is constituted by a member in which a cylindrical collar portion 46a and a plate-like cover portion 46b are integrally formed. Specifically, the connecting portion 46 is formed by rounding one end side of a flat steel plate into a cylindrical shape, and leaving the other end side in a plate-like state without rounding the collar portion 46a and the cover. The part 46b is integrally formed. Accordingly, the connecting portion 46 has an external shape such that the cover portion 46b circumscribes the cylindrical collar portion 46a.

  As shown in FIG. 2B, the connecting portion 46 is arranged so that the collar portion 46 a extends in the vertical direction, and the upper end portion and the lower end portion are fixed to the upper projecting portion 42 and the lower projecting portion 44. Thus, the carrier 30 is attached. Specifically, a bolt 48a inserted from the upper overhanging portion 42 side toward the lower overhanging portion 44 side in a collar portion 46a formed in a cylindrical shape, and a nut provided on the lower overhanging portion 44 side The connecting portion 46 is attached to the carrier 30 by fastening 48b. In the connecting portion 46 thus mounted, the collar portion 46 a functions as a support column of the carrier 30. Thereby, the impact acting on the carrier 30 in the vertical direction can be supported.

  Further, the connecting portion 46 is installed so that the cover portion 46 b is substantially parallel to the inner side surface 34 of the carrier 30. Therefore, the cover part 46 b can prevent foreign matter from entering the carrier 30 through the opening 40 for attachment / detachment. Further, in the present embodiment, as shown in FIG. 2B or FIG. 3, the cover portion 46 b faces the detachable opening 40 so as to have a shape (arc shape) along the outer edge of the detachable opening 40. A notch 46c is provided in the. Therefore, the cover portion 46 b does not interfere with the drive shaft 14 inserted through the attachment / detachment opening 40.

  As described above, in the rear suspension 10 of the present embodiment, the attachment / detachment opening 40 that enables the hub bearing 60 to be attached / detached by the bolt 52 that is a fixing member is provided on the inner side surface 34 of the carrier 30 located on the vehicle inner side. Is formed. That is, in the rear suspension 10 of the present embodiment, the opening / removal opening 40 is opened to the inner side surface 34 of the carrier 30 to the extent that the bolt 52 and the tool can be inserted when the hub bearing 60 is attached / detached. In other words, the size of the opening area of the opening 40 for attachment / detachment is larger than the cross-sectional areas of the hub 50 and the drive shaft 14. Further, an upper projecting portion 42 and a lower projecting portion 44 projecting inward of the vehicle from the inner side surface 34 are provided above and below the detachable opening 40, and both projecting portions 42, 44 are provided. Are connected by a connecting portion 46 extending in the vertical direction. This prevents a decrease in strength in the vertical direction of the carrier 30 due to the large opening 40 for attachment / detachment. Therefore, in the rear suspension 10, even when a vertical load is applied to the carrier 30 due to a bump of the vehicle or the like, the carrier 30 is not damaged.

  Further, as described above, since the strength of the carrier 30 can be maintained sufficiently high while ensuring the large opening 40 for attachment / detachment, the hub bearing 60 can be attached / detached from the inside of the vehicle. Further, by adopting such a configuration, it is possible to avoid interference with other members such as a rear brake component provided at a position adjacent to the hub bearing 60. As a result, the degree of freedom in designing the size and installation space of other members adjacent to the hub bearing 60 is increased, and the rear brake can be made compact.

  Further, in the rear suspension 10, a cover portion 46 b is provided on the connecting portion 46, and it is possible to prevent foreign matters such as stones from colliding with the carrier 30 and foreign matters from entering the cover portion 46 b. Therefore, in the rear suspension 10, it is possible to prevent the carrier 30 from being damaged due to the collision or intrusion of foreign matter.

  In this embodiment, the example which forms the collar part 46a and the cover part 46b which make the connection part 46 by processing a single steel plate was shown, However, This invention is not limited to this. Absent. Specifically, a cylindrical or columnar member may be prepared as the collar portion 46a, and a plate-like member corresponding to the cover portion 46b may be fixed to the collar portion 46a by a technique such as welding. Alternatively, the collar portion 46a and the cover portion 46b may be prepared as separate members and installed separately.

  Further, in the present embodiment, the configuration in which the cover portion 46b for preventing the collision or intrusion of foreign matter to the carrier 30 is illustrated, but the present invention is not limited to this, and the cover portion 46b is provided. There may be no configuration. In the above-described embodiment, an example in which the collar portion 46a is a hollow cylindrical body has been shown from the viewpoint of facilitating manufacture and the like, but the present invention is not limited thereto, and is a solid column body. It is also good. Also, the cross-sectional shape need not be circular, and may be elliptical or polygonal.

  The connecting portion 46 of this embodiment is fixed by a bolt 48a inserted through the collar portion 46a and a nut 48b fastened thereto. Therefore, the attaching operation of the connecting portion 46 can be performed after the hub bearing 60 is attached from the vehicle inner side direction.

  In the present embodiment, as an example of the downward projecting portion 44, an example using a steel plate plate fixed to the end of the axle beam 12 so as to be cantilevered by welding or the like is illustrated. It is not limited to this. That is, the configuration in which the downward projecting portion 44 is fixed to the axle beam 12 side, which is a separate member from the carrier 30, is illustrated, but the present invention is not limited to this. Specifically, the lower overhanging portion 44 may be formed by processing a steel plate that forms the carrier 30, similarly to the upper overhanging portion 42. Further, the downward projecting portion 44 may be formed by directly fixing a plate body forming the lower projecting portion 44 to the steel plate forming the carrier 30.

  Moreover, although the rear suspension 10 of this embodiment is provided with the drive shaft 14, this invention is not limited to this, The thing which is not provided with the drive shaft 14 may be sufficient. That is, the rear suspension 10 of the present embodiment is applied to a rear-wheel drive vehicle, but may be configured without the drive shaft 14 in the case of a front-wheel drive vehicle. Even in the case of such a configuration, the same effects as those exemplified in the present embodiment can be obtained.

  The dodion type rear suspension of the present invention can be suitably used as a vehicle rear suspension provided with a hub bearing. In particular, it can be suitably used for reducing the size of components such as a rear brake disposed at a position adjacent to the hub bearing or improving the degree of design freedom.

DESCRIPTION OF SYMBOLS 10 Rear suspension 12 Axle beam 14 Drive shaft 30 Carrier 34 Inner side surface 36 Reinforcement structure part 40 Detachable opening 42 Upper overhanging part 44 Lower overhanging part 46 Connection part (connection member)
46a Collar part 46b Cover part 50 Hub 52 Bolt (fixing member)
60 Hub bearing

Claims (1)

An axle beam that supports the left and right wheels at the rear end of the vehicle;
A carrier provided at an end of the axle beam;
A hub provided at an end of the carrier and rotating integrally with the wheel;
A hub bearing that rotatably supports the hub;
The hub bearing is fixed to the carrier from the inside of the vehicle;
In the carrier, an opening for attaching / detaching that allows the hub bearing to be attached / detached is formed on an inner side surface located inside the vehicle,
Have a connecting member connecting the career to the detachable opening, a portion of the connecting member is arranged so as to extend in the vertical direction, the upper side of the carrier the upper portion and lower portion of the part The dodion type rear suspension is characterized in that the connecting member is configured as a support column of the carrier by being fixed to the portion and the lower portion .

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