JPH0514887U - Tire testing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a tire testing machine having a simple structure and capable of easily carrying out a tire test. [Structure] The tire testing machine includes a swivel base 2 and the swivel base 2.
A flat belt device 6 arranged above and quasi-constructing a traveling road surface, a test stand 10 movably arranged with respect to the swivel base 2, and a test stand 10 provided on the test stand 10 and rolled on the flat belt 8. A mounting adjustment mechanism that rotatably supports the contacted tire T through a disc wheel, adjusts the load and camber angle of the tire, and an axle 6 component force attached to the disc wheel to detect the tire generated force. And a detector 40.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a tire testing machine for measuring a tire generated force.

[0002]

[Prior Art]

 A tire testing machine of this kind is disclosed in, for example, Japanese Patent Laid-Open No. 55-124041, and this known tire testing machine is equipped with a flat belt device for artificially creating a running road surface. This flat belt device has a flat belt as a traveling road surface, and the flat belt is driven to travel in one direction. Also, an A-shaped frame is erected from the base of the flat belt device, and this frame is equipped with a tire mounting device. It goes without saying that this tire mounting device has the function of rotatably supporting the tire on the flat belt, and also has the function of adjusting the slip angle in addition to the tire load and camber angle.

[0003]

[Problems to be solved by the device]

 By the way, in the above-mentioned known tire testing machine, since the tire mounting device itself is also attached to the base of the flat belt device via the frame, the flat belt device is dedicated only to the test of the tire. It will end up. On the other hand, the tire mounting device is configured so that the slip angle can be adjusted in addition to the tire load and camber angle, so not only the structure becomes complicated, but also its rigidity is sufficiently secured. Because of the need to do so, it has to be large.

The present invention has been made based on the above-mentioned circumstances, and an object thereof is to easily carry out a desired test with a simple structure without the flat belt device being dedicated to a tire test. It is to provide a tire testing machine that can do this.

[0005]

Means for Solving the Problems A tire testing machine of the present invention has a swivel base that can swivel and a flat belt that is arranged on the swivel base and artificially configures a road surface. The flat belt device that can be driven to move in any direction, the test stand that is movably arranged with respect to the swivel base, and the tire that is mounted on this test stand and is rolled on the flat belt via the disc wheel. The tire holding mechanism that rotatably supports the tire, the adjusting mechanism that is provided on the test stand and that adjusts the load and the camber angle of the tire rolling on the flat belt, and the disc wheel that is attached to detect the tire generated force. And a possible detector.

[0006]

[Action]

 According to the above-described tire testing machine, since the test stand is movable, the tire test can be performed by positioning the test stand at a predetermined position near the flat belt device on the swivel base only when performing the tire test. Machine is realized. After that, the tire is mounted on the tire holding mechanism of the test stand via the disc wheel, the tire is rolled on the flat belt, and the tire load and the camber angle are adjusted by the adjusting mechanism. On the other hand, the slip angle of the tire is adjusted by turning the flat belt device through the turning base with respect to the tire on the flat belt.

If the flat belt is run in this state, the tire will run on the road in a pseudo manner, and at this time, the tire generation force is detected by using the detector attached to the disc wheel. As a result, the predetermined test is carried out.

[0008]

【Example】

 Referring to FIG. 1, a tire testing machine is schematically shown, and the tire testing machine includes a swivel base 2. The swivel base 2 is connected to a swivel drive mechanism 4 shown by a block in FIG. 1, and the swivel drive mechanism 4 allows the swivel base 2 to swivel in a horizontal plane.

A flat belt device 6 is arranged on the swivel base 2. The flat belt device 6 has an endless flat belt 8, and the flat belt 8 is wound around, for example, a pair of rollers (not shown) so that it can run in one direction. Note that, in FIG. 1, a drive source and the like for driving the rollers are not shown.

The flat belt 8 has a relatively large rigidity and is capable of traveling stably, so that the flat belt 8 can artificially create a flat traveling road surface. .. In the case of this embodiment, four flat belt devices 6 are provided on the swivel base 2. With this, by supporting each wheel of the automobile through the flat belt device 6, the flat belt device 6 is supported. It is also possible to carry out various actual vehicle tests at.

A test stand 10 made of a triangular frame is arranged near the swivel base 2. The test stand 10 is capable of traveling on the rail surface plate 12 via wheels 14, so that the test stand 10 can be brought into contact with and separated from the swivel base 2, that is, the flat belt device 6. .. The test stand 10 is provided with a mounting adjustment mechanism 16 for mounting a tire and adjusting the load and the camber angle of the tire. In this embodiment, the mounting adjustment mechanism 16 has a head 20 supported on the upper portion of the test stand 10 via a pivot 18, and the head 20 is rotatable about the pivot 18 by a predetermined angle. Is becoming The tip of the head 20 and the test stand 10 are interconnected via a support link 22. The head 20 can be rotated by rotating the rotary shaft 24 protruding from the head 20 with a camber adjusting handle 26. That is, although not shown, in the head 20, the rotary shaft 24 and the above-mentioned pivot shaft 18 are engaged with each other via a rotary mechanism, and the rotary mechanism causes the rotary shaft 24 to rotate. 18, that is, the rotation of the head 20 is converted.

A load applying rod 28 extends downward from the head 20, and an upper end of the load applying rod 28 is supported in the head 20 so as to be slidable in the axial direction thereof. .. Further, the upper end of the load applying rod 28 is engaged with the rotating shaft 32 of the load adjusting handle 30 via a not-shown advancing / retreating mechanism, whereby the rotation operation of the load adjusting handle 30 is performed. It is converted into a forward / backward movement in the axial direction of.

The lower ends of the load-applying rod 28 are connected to the base ends of the upper arm 34 and the lower arm 36. The tips of the upper arm 34 and the lower arm 36 are connected to an axle hub via a ball joint or the like, though not shown. ing. Therefore, the tire T can be mounted on the axle hub via the disc wheel.

The lower end of the load applying rod 28 and the test stand 10 are connected to each other via a link 38, so that the load applying rod 28 is supported by the test stand 10. An axle 6 component force detector (for example, manufactured by Nissho Denki Co., Ltd.) 40 is attached to the disc wheel of the tire T. Since the axle 6 component force detector 40 is well known, its structure and function will not be described in detail. However, the detector 40 detects the tire generating force such as cornering force, self-aligning torque and longitudinal force. It has the function of detecting.

As shown in detail in FIG. 2, the axle 6 component force detector 40 includes a ring-shaped rim side flange 42 and a rim mounting flange with respect to a disc wheel DW indicated by a chain double-dashed line. 44 and a cylindrical hub adapter 46. That is, first, the peripheral edge of the rim-side flange 42 is connected to the inner edge of the rim of the disc wheel DW via a plurality of connecting bolts and nuts 48, and the inner edge of the rim-side flange 42 is The rim mounting flange 44 is connected via a plurality of connecting bolts 50.

The housing of the axle 6 component force detector 40 is attached to the rim attachment flange 44 via a plurality of connecting bolts 52, while the hub adapter 46 is fitted to the housing. The housing of the axle 6 component force detector 40 is connected to the hub adapter 46 via a connecting bolt (not shown). On the end surface of the hub adapter 46 on the disc wheel DW side, a plurality of bolt insertion holes 54 for connecting the hub adapter 46 to the above-described axle hub via connecting bolts are formed. Axial grooves 56 are formed on the outer peripheral surface of the hub adapter 46 in correspondence with the insertion holes 54, and these axial grooves 56 serve as connecting bolts for connecting the axle hub and the hub adapter 46. It defines a space for the head to escape.

Next, the operation of the above-described tire testing machine will be described below. When carrying out the test of the tire T, as shown in FIG. 1, the test stand 10 was moved to the vicinity of the flat belt device 6 on the swivel base 2 and the test stand 10 was positioned at a predetermined position. After that, the tire T with the disc wheel DW is mounted on the axle hub on the side of the test stand 10 as described above, and the tire T is placed on the flat belt 8 of the flat belt device 6.

In this state, when the air pressure of the tire T is set to a predetermined value, the load adjusting handle 30 is operated to set the pressing load of the tire T on the flat belt 8, that is, the ground contact load to a predetermined value. .. Then, the camber adjusting handle 26 is operated to set the camber angle α of the tire T 1 to a predetermined value. When the above-mentioned adjustment of the tire T is completed, the flat belt device 6 is driven, and the flat belt 8 is run in one direction at a predetermined speed to rotate the tire T. To continue for the time.

Thereafter, the above-described turning drive mechanism 4 is operated to slightly turn the flat belt device 6 via the turning base 2, whereby the slip angle β of the tire T is set to a predetermined value. The measurement of the 6-component force by the axle 6-component force detector 40 is started. The 6-component force is, for example, a force acting on the tire T in the XYZ axis direction and a moment around these XYZ axes. From these data, the cornering force, the self-aligning torque, and the longitudinal force of the tire T can be obtained. The force generated can be measured.

The above-described test of the tire T is repeatedly performed by gradually changing the slip angle of the tire T to the maximum slip angle. When the test of the tire T is completed, the tire T is removed from the test stand 10, and then the test stand 10 is moved from the flat belt device 6, that is, the swivel base 2 to a predetermined standby position. As a result, the flat belt device 6 can be used for actual vehicle tests other than the tire T test.

The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the mechanism for adjusting the load of the tire T and the camber angle α of the test stand 10 is not limited to the illustrated embodiment, and it goes without saying that various mechanisms can be considered.

[0022]

[Effect of the device]

 As described above, according to the tire testing machine of the present invention, since the test stand is movable with respect to the flat belt device on the swivel base, the flat belt device can be used only when the tire is tested. A tire testing machine can be easily realized by combining the and the test stand. Therefore, when the tire test is not performed, it is possible to perform other tests using the flat belt device. Further, in the case of this invention, since the flat belt device itself is arranged on the swivel base, the slip angle of the tire can be adjusted by turning the flat belt device, and accordingly, the test stand is attached. The test stand is equipped with only a mechanism for adjusting the tire load and its camber angle, and the test stand can be easily obtained without increasing the size of the test stand or complicating its structure. There is an effect such as being able to.

[Brief description of drawings]

FIG. 1 is a side view schematically showing a tire testing machine of an example.

FIG. 2 is a cross-sectional view showing a mounting structure of an axle 6 component force detector on a disc wheel.

[Explanation of symbols]

 2 swivel base 6 flat belt device 8 flat belt 10 test stand 26 camber adjustment handle 30 load adjustment handle 40 axle 6 component force detector T tire α camber angle β slip angle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Omuro 5-3-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation (72) Inventor Yasumitsu Sato 5-3-8-3 Shiba, Minato-ku, Tokyo Mitsubishi Automobile Industry Co., Ltd. (72) Inventor Hiroyuki Masuda No. 1 Nakashiniri, Hashime-cho, Okazaki-shi, Aichi Mitsubishi Motors Engineering Co., Ltd. Okazaki Plant

Claims (1)

[Scope of utility model registration request] 1. A flat belt device having a rotatable swivel base and a flat belt disposed on the swivel base to artificially form a traveling road surface, the flat belt being capable of traveling in one direction. A test stand movably arranged with respect to the swivel base, and this test stand,
A tire holding mechanism for rotatably supporting a tire rolled on a flat belt via a disc wheel, and an adjusting mechanism provided on a test stand for adjusting the load and the camber angle of the tire rolled on the flat belt. And a detector attached to the disc wheel and capable of detecting a tire generated force.