JP6646095B2 - suspension - Google Patents

Description

  The present invention relates to a suspension having a trailing arm, and more particularly to a hub unit attached to an end of the trailing arm.

  Conventionally, there is a torsion beam type suspension including a pair of trailing arms arranged at intervals in a vehicle width direction and a torsion beam provided between and coupled to the pair of trading arms. The torsion beam type suspension has a structure that allows the torsional movement of the wheels connected to each trading arm by torsion of the torsion beam.

  Each of the trailing arms includes a vehicle body mounting portion that is mounted on the vehicle body, and a wheel mounting portion that mounts a wheel, and extends from the wheel mounting portion to the vehicle body mounting portion with a predetermined curvature in a hollow shape. Wheels are mounted on the wheel mounting portion of the trailing arm via a hub unit for inserting and holding the axle. As such a hub unit, for example, as shown in Patent Document 1, there is a hub unit attached to a trailing arm via a hub unit coupling member (end plate).

  By the way, the hub unit is provided with a sensor unit for an ABS sensor that detects rotation of a wheel. The sensor unit is attached to the tip side of the axle inserted into the hub unit, and is located inside the hollow trailing arm with the hub unit attached to the trailing arm.

JP 2013-23150 A

  In the hub unit described in Patent Document 1 described above, the sensor section is provided on the side opposite to the vehicle body mounting section side of the trailing arm, that is, on the side opposite to the center of curvature of the curved trailing arm. An arched cut portion is formed outside the end of the trailing arm so as not to interfere with the ring arm. However, the present inventors have made intensive studies and found that the end of the trailing arm is sometimes welded to the end plate, and it is not desirable to provide a cut portion from the viewpoint of strength.

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a suspension including a hub unit that can be attached to a trailing arm without providing a cutting portion in a trailing arm in consideration of interference with a sensor unit provided in the hub unit. .

  (1) A suspension according to the present invention includes a trailing arm that extends from a wheel mounting portion to a vehicle body mounting portion in a hollow shape while being curved at a predetermined curvature, and a wheel attached to the wheel mounting portion of the trailing arm. A hub unit that holds the axle, wherein the hub unit includes a unit body that holds the axle, first and second mounting portions that are spaced with the held axle therebetween, A sensor unit provided at a tip end side of the axle at a distance from the center of the axle to the first mounting portion or the second mounting portion, wherein the first mounting portion is held. A pair of first protrusions protruding from the unit body in the same direction as the axle are provided at intervals with a virtual center plane including the center of the axle interposed therebetween, and the second mounting portion includes a pair of the first protrusions. Different from the first convex part A pair of second projections protruding from the unit body in the same direction as the axle at intervals with the center plane interposed therebetween, and the axle mounting portion of the trailing arm includes A pair of first concave portions for receiving the first convex portion, and a pair of second concave portions for receiving the pair of second convex portions, wherein the sensor unit is configured such that the hub unit is mounted on the trailing arm. The interior of the trailing arm in a hollow state in a mounted state is located closer to the vehicle body mounting portion than the center of the axle.

  In such a suspension, the hub unit mounted on the wheel mounting portion of the trailing arm that extends from the wheel mounting portion to the vehicle body mounting portion while bending at a predetermined curvature is located inside the hollow trailing arm. The sensor section is located closer to the vehicle body mounting section than the center of the axle, that is, closer to the center of curvature of the curved trailing arm. Accordingly, the sensor portion can be accommodated in the trailing arm, and it is not necessary to provide a cutting portion on the trailing arm so as not to interfere with the sensor portion. In addition, the pair of first convex portions and the pair of second convex portions Are formed at different intervals, so that the mounting direction of the hub unit to the trailing arm is not mistaken.

  (2) In the suspension described above, each of the first and second convex portions may be a bolt, and each of the first and second concave portions may be a through hole through which the bolt passes. With this configuration, the hub unit can be easily attached to the trailing arm by passing the first and second protrusions through the through holes.

  Furthermore, in the above-mentioned suspension, if the hub unit is manufactured in mirror image symmetry, the same type can be attached to the pair of left and right trailing arms in common. For example, the hub unit described in Patent Literature 1 is manufactured to be vertically symmetric with respect to a horizontal plane including an axle. Some other hub units are manufactured symmetrically with respect to the vertical plane including the center of the axle. From these facts, the present inventors have conducted intensive studies and found that the hub unit is mirror-symmetric with respect to a virtual center plane including the center of the held axle, so that the hub unit is common to the pair of left and right trailing arms. We have found that the same type can be attached.

  (3) Based on this finding, in the suspension described above, in the hub unit, the first mounting portion and the second mounting portion are formed in mirror image symmetry with respect to the center plane as a center of symmetry, and the sensor unit is positioned in the center. It may be located on a surface. By doing so, the same type of hub unit can be attached to the pair of left and right trailing arms in common.

  (4) Another suspension of the present invention is a trailing arm that extends from the wheel mounting portion to the vehicle body mounting portion in a hollow shape while bending at a predetermined curvature, and is attached to the wheel mounting portion of the trailing arm. And a hub unit for holding an axle of wheels, wherein the hub unit includes first and second mounting portions provided so as to sandwich the axle, and the axle of the axle at a tip end side of the axle. A sensor provided at a distance from the center to the first mounting portion or the second mounting portion, wherein the axle mounting portion of the trailing arm is compatible with the first mounting portion. A first mounted portion and a second mounted portion adapted to the second mounting portion, wherein the sensor portion has a hollow shape in a state where the hub unit is mounted on the trailing arm. The train Inside the ring arm, the hub unit is located closer to the vehicle body mounting portion than the center of the axle, and the hub unit is provided such that the first mounting portion and the second mounting portion are mirror-image-symmetric about the center plane as a center of symmetry. And the sensor unit is attached so as to be located on the center plane.

  In such a suspension, the hub unit attached to the wheel attachment portion of the trailing arm that extends from the wheel attachment portion to the vehicle body attachment portion while bending at a predetermined curvature is located inside the hollow trailing arm. The sensor section is located closer to the vehicle body mounting section than the center of the axle, that is, closer to the center of curvature of the curved trailing arm.

  Accordingly, the sensor section can be accommodated in the trailing arm, and it is not necessary to provide a cutting section on the trailing arm so as not to interfere with the sensor section. In addition, since the first mounting portion and the second mounting portion are different, the direction in which the hub unit is mounted on the trailing arm is not mistaken, and the same type of hub unit is shared by the pair of left and right trailing arms. Can be attached.

  ADVANTAGE OF THE INVENTION According to this invention, the suspension provided with the hub unit which can be attached to a trailing arm without providing a cutting part in consideration of interference with the sensor part provided in the hub unit can be provided. .

FIG. 1 is a schematic perspective view of a torsion beam suspension according to the embodiment. FIG. 4 is a schematic perspective view showing a trailing arm and a hub unit. It is a schematic plan view showing the state where the hub unit was attached to the trailing arm. It is the schematic which shows that a hub unit is a mirror image symmetry centering | focusing on a center plane, and can be commonly used for both the left trailing arm and the right trailing arm.

  A suspension 1 according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view of a torsion beam type suspension 1.

  The suspension 1 is provided on the rear wheel side of a front-wheel drive automobile, and has a structure that allows the up-and-down movement of each of the left and right trailing arms 2L and 2R to which a rear wheel (not shown) is attached, by torsion of the torsion beam 3. This is a so-called torsion beam type suspension.

  As shown in FIG. 1, a suspension 1 includes a pair of trailing arms 2L and 2R arranged at intervals in a width direction (lateral direction) of a vehicle body (not shown), and extends linearly in the width direction of the vehicle. And a torsion beam 3 coupled to the trailing arms 2L, 2R at both ends in the extending direction. The torsion beam 3 is formed by bending a plate-shaped member and forming a U-shaped gutter-shaped cross section, and has a gutter-shaped opening facing the lower side of the vehicle body, that is, a saddle-shaped shape.

  The pair of trailing arms 2L and 2R are formed so as to have a symmetrical shape on the left and right, and each of the trailing arms 2L and 2R is press-fitted with a tubular bush, which is an elastic member, on the front side of the vehicle body. The bush press-fitting portion functions as a vehicle body attaching portion 21 that is swingably attached to the vehicle body via a bracket (not shown) or a fixing bolt (not shown).

  Each of the trailing arms 2L and 2R is suspended from the rear of the vehicle body via a spring (not shown) and a shock absorber (not shown). A rear wheel axle 4 is attached to one end on the rear side of the trailing arm 2 via a hub unit 30. Therefore, the trailing ends of the trailing arms 2L and 2R function as the wheel mounting portion 22 to which the hub unit 30 holding the axle 4 is mounted.

  FIG. 2 is a schematic perspective view showing the trailing arm 2R located on the right side of the vehicle body and the hub unit 30.

  As shown in FIG. 2, the hub unit 30 includes a plate-shaped unit main body 31, a hub bearing 33 provided on the unit main body 31, a sensor unit 34 for detecting rotation of a wheel, and one through the unit main body 31. A pair of first and second projections 35 and 36 projecting from one side to the other. The unit main body 31 holds the axle 4 by being fitted thereto via a hub bearing 33. Thereby, the hub unit 30 can rotatably support the axle 4.

  The pair of first and second projections 35 and 36 project from the unit main body 31 around the hub bearing 33 in the same direction as the axle 4. The first and second projections are so-called bolts. The sensor unit 34 is provided on the tip side of the axle. The sensor unit 34 has a predetermined dimension in the axle direction, detects a change in magnetism provided on the wheel side, and can measure the number of rotations of the wheel.

  The trailing arm 2R extends in a hollow shape from the wheel mounting portion 22 to the vehicle body mounting portion 21 while being curved at a predetermined curvature. The trailing arm 2R has a so-called end plate 23 welded to the wheel mounting portion 22 and joined thereto. The end plate 23 includes a pair of first recesses 25 and a pair of second recesses 26.

  The end plate 23 has an axle through hole 24, and the axle 4 and the sensor unit 34 are inserted into the hollow trailing arm through the axle through hole 24 when the hub unit 30 is attached.

  FIG. 3 is a schematic plan view showing the inside of the trailing arm with the hub unit 30 attached to the trailing arm 2R.

  As shown in FIG. 3, in the hub unit 30, the sensor unit 34 and the axle 4 are inserted into the trailing arm 2 </ b> R through the axle through hole 24, and the pair of first convex portions 35 And a pair of second convex portions 36 are inserted into a pair of second concave portions (through holes) 26. Therefore, the sensor unit 34 is located inside the hollow trailing arm 2R with the hub unit 30 attached to the trailing arm 2R. The first convex portion 35 and the second convex portion 36 protrude from the unit main body 31 in the same direction as the axle 4.

  Further, the sensor portion 34 is provided on the vehicle body mounting portion 21 side of the trailing arm 2 </ b> R that extends in a curved manner from the wheel mounting portion 22 to the vehicle body mounting portion 21 at a distance from the center o of the axle 4. The sensor portion 34 has a predetermined dimension in the thickness direction of the end plate 23 to which the hub unit is mounted, but can be housed in the trailing arm 2R by being located on the vehicle body mounting portion 21 side of the trailing arm 2R. Have been.

  The pair of first concave portions 25 are first through holes that receive the pair of first convex portions 35 corresponding to the pair of first convex portions 35. Similarly, the pair of second concave portions 26 are second through holes that receive the pair of second convex portions 36 corresponding to the pair of second convex portions 36. The first and second projections 35 and 36 are screwed with nuts (not shown) while passing through the first and second through holes, and the hub unit 30 is fixed to the end plate 23. Attached.

  The pair of first through holes and the pair of second through holes are formed at different intervals. The first through-hole is formed corresponding to the first convex portion 35, and the second through-hole is similarly formed corresponding to the second convex portion 36. Therefore, the hub unit 30 is attached to the end plate 23 of the trailing arm 2R such that the first protrusion 35 is inserted into the first through hole and the second protrusion 36 is inserted into the second through hole. Therefore, the mounting direction of the hub unit 30 is not mistaken.

  FIG. 4 shows that the hub unit 30 is symmetrical with respect to a virtual center plane i including the center o of the axle, and can be commonly used for both the left trailing arm 2L and the right trailing arm 2R. FIG. The center o of the axle 4 extends in the paper back direction in FIG. 4, and the center plane i extends in the horizontal direction and the paper back direction in FIG.

  As shown in FIG. 4, the hub unit 30 is formed symmetrically with a virtual center plane i including the center o of the held axle 4 as the center of symmetry. Each of the first protrusions 35 is provided at equal intervals (arrow a in FIG. 4) from the center plane i, and the pair of first protrusions 35 are spaced from each other with the center plane i interposed therebetween. Similarly, the second convex portions 36 are provided at equal intervals (arrow b in FIG. 4) from the center plane i, and the pair of second convex portions 36 are spaced from each other with the center plane i interposed therebetween.

  Here, the interval between the pair of second convex portions 36 is different from the interval between the pair of first convex portions 35. Therefore, the interval between the pair of second concave portions 26 corresponding to the pair of second convex portions 36 is, of course, different from the interval between the pair of first concave portions 25 corresponding to the pair of first convex portions 35. Thereby, the mounting direction of the hub unit is not mistaken.

  The sensor part 34 is located on the center plane i on the tip end side of the axle 4 and slightly shifted from the center o of the axle 4 toward the first convex part 35 (arrow c in FIG. 4). Is provided. Since the hub unit 30 is formed mirror-symmetrically with respect to the center plane i as the center of symmetry, the hub unit 30 can be mounted on any of the wheel mounting portions 22 of the trailing arm 2R and the trailing arm 2L.

  Here, the pair of first convex portions 35 function as a first attaching portion for attaching the hub unit 30 to the trailing arms 2L, 2R. Similarly, the pair of second convex portions 36 serve as the hub unit 30. Function as a second attaching portion for attaching the first to the trailing arms 2L and 2R. Further, the first recess 25 provided in the trailing arms 2L and 2R functions as a first attachment portion to which the first attachment portion is attached, and the second recess 26 functions as a second attachment portion. It functions as a second mounted portion to be mounted.

  In the present embodiment, the sensor unit 34 is located on the center plane i on the tip side of the axle 4, and is slightly offset from the center o of the axle 4 to be closer to the first protrusion 35. And the form provided. However, as long as the sensor unit 34 is located on the center plane i, the sensor unit 34 may be provided slightly away from the center o of the axle 4 and at a distance from the second convex portion 36.

  In the present embodiment, a description has been given of a mode in which the hub unit 30 is mirror-symmetric with respect to all configurations with the center plane i as the center symmetry. However, the hub unit 30 may not be symmetrical in other configurations as long as at least the first mounting portion and the second mounting portion are mirror-image-symmetric and the sensor portion is located on the center plane i.

  In the present embodiment, the first and second convex portions 35 and 36 are bolts projecting in a columnar shape, are inserted into the first and second through holes, and screw the nut. However, the first and second through holes may be threaded, and the first and second convex portions 35 and 36, which are bolts, may be screwed together.

  Further, in the present embodiment, the form in which the first and second convex portions 35 and 36 are bolts protruding in a columnar shape has been described. However, the first and second projections 35 and 36 are not bolts but polygonal or circular pillars or cones, and have only the function of preventing the mounting direction of the hub unit from being erroneous. The hub unit and the trailing arm may be attached by the attaching means of (1). Even in this case, the first and second mounted portions may be formed in shapes corresponding to the shapes of the first and second mounted portions.

  In the present embodiment, the form in which the suspension 1 is applied to the rear wheels of the front wheel drive vehicle has been described. However, the suspension may be used for the rear wheels of a four-wheel drive vehicle, or may be used for automobiles or front wheels of other drive systems.

However, the configuration shown in each of the above embodiments is a specific example of a component, and each configuration, shape, or mounting mode is limited to that shown in the embodiment without departing from the gist of the present invention. Instead, various modifications or changes are possible.

  The present invention can be used for suspensions.

Reference Signs List 1 Suspension 2L Left trailing arm 2R Right trailing arm 3 Torsion beam 23 End plate 25 First recess 26 Second recess 30 Hub unit 34 Sensor unit 35 First protrusion 36 Second protrusion i Center plane o Center of axle

Claims (1)

A trailing arm extending in a hollow shape while bending at a predetermined curvature from the wheel mounting portion to the vehicle body mounting portion,
A hub unit attached to the wheel attachment portion of the trailing arm, the hub unit holding an axle of a wheel,
The hub unit includes a unit main body that holds the axle, first and second mounting portions that are spaced from each other with the axle held therebetween, A sensor unit provided at a distance from the mounting unit side or the second mounting unit side,
The first mounting portion is provided with a pair of first protrusions protruding from the unit body in the same direction as the axle at intervals with a virtual center plane including the center of the held axle interposed therebetween,
The second mounting portion includes a pair of second protrusions projecting from the unit main body in the same direction as the axle, with the center plane interposed therebetween at a different interval from the pair of first protrusions. Prepare,
The axle mounting portion of the trailing arm includes a pair of first concave portions that receive the pair of first convex portions, and a pair of second concave portions that receive the pair of second convex portions,
The sensor unit is located inside the hollow trailing arm with the hub unit attached to the trailing arm, closer to the vehicle body mounting unit than the center of the axle. ,suspension.

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