JP2006098319A - Device for measuring shaft right-angled load of wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To measure shaft right-angled load of a wheel while facilitating machining of a shaft part and a support cylinder and assembling work, in a device for measuring the shaft right-angled load of the wheel attaching a detection part for measuring load acting on a shaft part in a shaft right-angled direction by providing the part to be detected on the outer periphery of the shaft part provided integrally on a hub coupled coaxially to the wheel, interposing a ball bearing between a part to be detected and the shaft part, surrounding the shaft part, and detecting the part to be detected to a cylindrical support cylinder part supported on a vehicle body side. <P>SOLUTION: The device for measuring the shaft right-angled load of the wheel is provided with the part to be detected 18 on the outer periphery of the end of the shaft part 1a of the reverse side to the wheel WD concerning the ball bearings 8 and 9. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, a detected portion is provided on an outer periphery of a shaft portion integrally provided on a hub that is coaxially coupled to a wheel, and a ball bearing is interposed between the shaft portion and the shaft portion is surrounded. The present invention relates to a wheel axis perpendicular load measuring device in which a detection unit for measuring a load acting on the shaft part in a direction perpendicular to the axis by detecting the detected part is attached to a cylindrical support tube part supported on the vehicle body side. .

For example, a wheel axis perpendicular load measuring device that detects a loaded load acting on a wheel from above is already known, for example, in Patent Document 1.
Japanese Patent Laid-Open No. 2004-3918

  However, in the above-described conventional one, the detected portion is disposed on the outer periphery of the shaft portion between a pair of ball bearings interposed between the shaft portion integrally provided in the hub and the support cylinder portion supported on the vehicle body side. The shape of the shaft part at the part corresponding to the detected part and the shape of the support cylinder part at the part where the detection part is attached are complicated, and the processing and assembly work of the shaft part and the support cylinder part are complicated. It becomes complicated.

  The present invention has been made in view of such circumstances, and provides a wheel right-angle load measuring device that makes it possible to measure a right-axis load of a wheel by facilitating machining and assembling work of a shaft portion and a support tube portion. The purpose is to do.

  In order to achieve the above object, according to a first aspect of the present invention, a detected portion is provided on an outer periphery of a shaft portion integrally provided with a hub coaxially coupled to a wheel, and a ball bearing is provided between the shaft portion and the shaft portion. Detection that measures the load acting on the shaft portion in the direction perpendicular to the axis by detecting the detected portion on a cylindrical support tube portion that surrounds the shaft portion and is supported on the vehicle body side. In the wheel axis perpendicular load measuring device to which the part is attached, the detected part is provided on the outer periphery of the end of the shaft part opposite to the wheel with respect to the ball bearing.

  According to a second aspect of the invention, in addition to the configuration of the first aspect of the invention, a pulsar ring adjacent to the detected portion is provided on the outer periphery of the shaft portion on the opposite side of the wheel with respect to the ball bearing. A speed sensor for detecting a pulsar ring to obtain a wheel speed and the detection part are attached to the support cylinder part so as to be held by a common holder.

  According to the first aspect of the present invention, the detected portion and the detecting portion are disposed at the end of the shaft portion and the supporting cylinder portion on the opposite side of the wheel with respect to the ball bearing. It is possible to simplify the shape of the shaft part and the support cylinder part when arranging the parts, and it is possible to measure the wheel axis perpendicular load while facilitating the machining and assembly work of the shaft part and the support cylinder part It becomes.

  According to the second aspect of the present invention, it is possible to arrange the harnesses for taking out signals accompanying the detection of the wheel perpendicular load and the wheel speed, and to simplify the mounting.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples of the present invention shown in the accompanying drawings.

  FIG. 1 shows an example of application to a drive wheel. A hub 1 that is coaxially coupled to a drive wheel WD has a flange portion 1b that projects radially outward from the outer end of a cylindrical shaft portion 1a. The flange portion 1b is fastened to the drive wheel WD with a plurality of bolts 2 ... and nuts 3 .... In addition, a drive axle 5 is inserted into the inner periphery of the shaft portion 1a. The drive axle 5 is made incapable of relative rotation around the axis by engagement with a spline groove 4 formed on the inner periphery. 5 is engaged with the hub 1. As a result, the hub 1 rotates integrally with the drive axle 5.

  On the other hand, the shaft portion 1a is surrounded by a cylindrical support tube portion 7 that integrally includes a flange portion 7a fastened to a suspension device on the vehicle body side at an outer end on the drive wheel WD side. A pair of ball bearings 8 and 9 are interposed between the outer end portion on the flange portion 1 b side and the support cylinder portion 7. Both ball bearings 8 and 9 are a plurality of balls respectively held by retainers 12 and 13 between a support cylinder portion 7 that functions as a common outer ring and inner rings 10 and 11 that are press-fitted into the shaft portion 1 a of the hub 1. 14... 15 are sandwiched so as to be able to roll. In addition, annular seal members 16 and 17 are interposed between the support cylinder portion 7 and the inner rings 10 and 11 at a position sandwiching the ball bearings 8 and 9 from both sides in the axial direction.

  By the way, when executing anti-lock brake control, it is possible to obtain the maximum deceleration according to the road surface by controlling the brake fluid pressure when the friction coefficient between the tire of the drive wheel WD and the road surface is near the maximum value. Therefore, in order to satisfy such a demand, the braking torque of the drive wheel WD may be detected and reflected in the antilock brake control.

  Thus, the braking torque is a front-to-rear axial right-angle load that acts on the shaft portion 1a of the hub 1 when the driving wheel WD is braked. In order to detect such front-rear-direction axial right-angle load, A detected portion 18 is provided on the outer periphery of the shaft portion 1a, and a load acting on the shaft portion in the front-rear direction is measured on the support cylinder portion 7 by detecting the detected portion 18. A detector 19 is attached.

  The detected portion 18 is made of a metal that is formed in a ring shape so as to be fitted and fixed to the shaft portion 1a, and the detecting portion 19 corresponds to the distance from the detected portion 18. Three or more coils 20 that output different signals are embedded and held in a cylindrical holder 21 made of synthetic resin at equal intervals in the circumferential direction. Thus, when the drive wheel WD is braked, the gap along the front-rear direction between the shaft portion 1a and the support cylinder portion 7 changes minutely according to the braking torque acting on the shaft portion 1a. The braking torque can be measured based on the combination of the output signals of the coils 20.

  Moreover, the detected portion 18 is provided on the outer periphery of the inner end portion of the shaft portion 1a that is the end portion on the opposite side of the drive wheel WD with respect to the pair of ball bearings 8 and 9. A pulsar ring 22 adjacent to the detected portion 18 is provided on the outer periphery of the shaft portion 1a on the opposite side of the drive wheels WD with respect to the ball bearings 8 and 9, and the wheel speed is detected by detecting the pulsar ring 22. A speed sensor 23 to be obtained is held by a holder 21 common to the detection unit 19.

  Thus, the detection part 19 and the speed sensor 23 are attached to the support cylinder part 7 by fitting and fixing the cylindrical holder 21 to the support cylinder part 7 from the side opposite to the driving wheel WD.

  FIG. 2 shows an example of application to the driven wheel WF. A hub 31 that is coaxially coupled to the driven wheel WF projects radially outward from the outer end of a stepped columnar shaft portion 31a. A flange portion 31b is integrally formed, and the flange portion 31b is fastened to the driven wheel WF by a plurality of bolts 32 and nuts 33.

  On the other hand, the shaft portion 31a is surrounded by a cylindrical support tube portion 37 that integrally includes a flange portion 37a fastened to the suspension device on the vehicle body side at the outer end on the driven wheel WF side. A pair of ball bearings 8 and 9 are interposed between the outer end portion on the flange portion 31 b side and the support cylinder portion 37. Both ball bearings 8 and 9 are a plurality of balls respectively held by retainers 12 and 13 between a support cylinder portion 37 that functions as a common outer ring and inner rings 10 and 11 that are press-fitted into the shaft portion 31 a of the hub 31. 14... 15 are sandwiched so as to be able to roll, and an annular seal member 16 is interposed between the support cylinder portion 37 and the inner rings 10 and 11 at a position where both ball bearings 8 and 9 are sandwiched from both sides in the axial direction. , 17 are interposed.

  Further, in order to detect the braking torque used when the antilock brake control is executed, the outer periphery of the shaft portion 31a is made of a metal covering formed in a ring shape so as to be fitted and fixed to the shaft portion 31a. The detection unit 18 is provided, and the support cylinder unit 37 includes three or more coils 20, 20... Embedded in and held in a cylindrical holder 21 made of synthetic resin at equal intervals in the circumferential direction. 19 is attached, and the coils 20, 20... Of the detection unit 19 output different signals according to the distance from the detected unit 18.

  Moreover, the detected portion 18 is provided on the outer periphery of the inner end portion of the shaft portion 31a which is the end portion on the opposite side of the driven wheel WF with respect to the pair of ball bearings 8 and 9. A pulsar ring 22 adjacent to the detected portion 18 is provided on the outer periphery of the shaft portion 31a on the opposite side of the driven wheel WF with respect to the ball bearings 8 and 9, and the wheel speed is detected by detecting the pulsar ring 22. The speed sensor 23 for obtaining is held by the holder 21 common to the detection unit 19, and the detection unit 19 and the speed sensor 23 place the cylindrical holder 21 on the support cylinder unit 37 from the side opposite to the driven wheel WF. It is attached to the support cylinder part 37 by fitting and fixing.

  Next, the operation of this embodiment will be described. The detected portions 18 are provided on the outer periphery of the shaft portions 1a, 31a provided integrally with the hubs 1, 31 that are coaxially coupled to the driving wheel WD and the driven wheel WF. A pair of ball bearings 8 and 9 are interposed between the shaft portions 1a and 31a to surround the shaft portions 1a and 31a and are detected by cylindrical support tube portions 7 and 37 supported on the vehicle body side. A detection unit 19 for measuring a load acting on the shaft portions 1a and 31a in a direction perpendicular to the axis is detected by detecting the portion 18, and the drive wheel WD and the driven wheel WF are associated with the ball bearings 8 and 9. The to-be-detected portion 18 is provided on the outer periphery of the ends of the shaft portions 1a and 31a on the opposite side.

  In this way, the detected portion 18 and the detecting portion 19 are disposed at the ends of the shaft portions 1a and 31a and the support cylinder portions 7 and 37 on the opposite side of the drive wheels WD and the driven wheels WF with respect to the ball bearings 8 and 9. Thus, it is possible to simplify the shapes of the shaft portions 1a and 31a and the support cylinder portions 7 and 37 when arranging the detected portion 18 and the detection portion 19, and the shaft portions 1a and 31a and the support cylinder portion 7 can be simplified. , 37 can be easily measured, and the braking torque, which is a load perpendicular to the axes of the driving wheel WD and the driven wheel WF, can be measured.

  Further, a pulsar ring 22 adjacent to the detected portion 18 is provided on the outer periphery of the shaft portions 1a and 31a on the opposite side to the driving wheel WD and the driven wheel WF with respect to both the ball bearings 8 and 9, and the pulsar ring 22 is detected. Since the speed sensor 23 and the detection unit 19 for obtaining the wheel speed are attached to the support cylinders 7 and 37 so as to be held by the common holder 21, the braking torque and the wheel speed of the driving wheel WD and the driven wheel WF are attached. It is possible to arrange the harnesses for taking out signals accompanying the detection of the above together and to simplify the installation.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.

It is a longitudinal cross-sectional view which shows the hub vicinity of the driving wheel WD. It is a longitudinal cross-sectional view which shows the hub vicinity of the driven wheel WF.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,31 ... Hub 1a, 31a ... Shaft part 7, 37 ... Supporting cylinder part 8, 9 ... Ball bearing 18 ... Detected part 19 ... Detection part 21 ... Holder 22 ... Pulsar ring 23 ... Speed sensor WD ... Drive wheel WF ... Driven wheel

Claims (2)

  A detected portion (18) is provided on the outer periphery of a shaft portion (1a, 31a) provided integrally with a hub (1, 31) coaxially coupled to a wheel (WD, WF), and the shaft portion (1a, 31a). The ball bearing (8, 9) is interposed between the shaft portion (1a, 31a) and the cylindrical support tube portion (7, 37) supported on the vehicle body side. In the wheel right-angle load measuring device to which the detection unit (19) for measuring the load acting on the shaft (1a, 31a) in the direction perpendicular to the axis by detecting the detection unit (18) is mounted, the ball bearing ( 8 and 9), the detected part (18) is provided on the outer periphery of the end part of the shaft part (1a, 31a) opposite to the wheel (WD, WF). Load measuring device.   A pulsar ring (22) adjacent to the detected part (18) is provided on the outer periphery of the shaft part (1a, 31a) on the opposite side of the wheel (WD, WF) with respect to the ball bearing (8, 9). The support cylinder (7, 7) is configured so that the speed sensor (23) for detecting the pulsar ring (22) to obtain the wheel speed and the detector (19) are held by a common holder (21). 37) The wheel axis perpendicular load measuring device according to claim 1, which is attached to 37).

Images