CN202171533U - Arc-shaped guide rail cornering cambering high speed tyre testing machine - Google Patents

Abstract

The utility model relates to a high-speed tire testing machine for arc-shaped guide rail sideways tilting. The testing machine includes an arc-shaped guide rail side-bias positioning mechanism, an arc-shaped guide rail rollover positioning mechanism, a double-guide rail vertical loading positioning mechanism, a six-component force sensor and Drive brake assembly, test drum; the utility model is simple and reasonable in structure, low in price, can realize various operating conditions of the tire, the center of the tire footprint remains unchanged under the compound working condition, and can accurately control the movement of the six degrees of freedom of the tire parameters to realize accurate measurement of tire six-component force characteristics.

Description

Curved guide rail side tilting high speed tire testing machine

technical field

The utility model relates to an indoor tire mechanical characteristic testing device, specifically a testing machine for tire side deviation and roll motion positioning through an arc-shaped guide rail mechanism, which can measure the mechanical characteristics of the tire under high-speed operating conditions.

Background technique

The mechanical characteristics of tires are the basis of automobile performance analysis and design, and have an important impact on the safety, handling stability, ride comfort and NVH performance of automobiles. The tire mechanical characteristic testing machine is one of the key test equipment for tire characteristic modeling and vehicle performance integration, adjustment and development. The relationship between the ground six-component force, which is the source of key data for vehicle dynamics simulation design.

The trailer-type outdoor tire testing machine can simulate the operation of tires in various road conditions, but due to the randomness of the outdoor environment and the influence of factors such as uneven road surfaces, the obtained test data is not accurate and has a large dispersion. The indoor tire testing machine eliminates the influence of the outdoor environment on the tire test data. In addition to simulating the relative movement between the road surface and the wheels, this kind of testing machine can usually realize tire side deflection and roll motion, but due to imperfect mechanism principles, it is common. The problem of the movement of the center of the tire footprint during the rolling and yaw motion causes the marginal effect of the roll motion coupling that cannot be eliminated, such as the widely used flat-belt high-speed tire mechanical characteristic testing machine produced by the American MTS company. , which makes it difficult to control the motion input parameters of the test tire, so that the test data is inaccurate. In addition, the current testing machine capable of testing the characteristics of tire composite working conditions is complex in structure, large in size and expensive in cost.

Contents of the invention

The purpose of this utility model is to provide a simple and reasonable structure, low price, which can realize various operating conditions of the tire, the center of the tire footprint remains unchanged under the compound working condition, and can accurately control the motion parameters of the six degrees of freedom of the tire to realize A high-speed tire testing machine with arc-shaped guide rails for accurate measurement of six-component force characteristics of tires.

The purpose of this utility model is achieved in that the testing machine includes an arc-shaped guide rail side bias positioning mechanism, an arc-shaped guide rail rollover positioning mechanism, a double guide rail vertical loading positioning mechanism, a six-component force sensor and a drive brake assembly, and the test rotation drum;

①. The side-biased positioning mechanism of the arc-shaped guide rail includes a side-biased motor, a side-biased worm, a side-biased arc-shaped worm wheel, an arc-shaped base, a side-biased arc-shaped guide rail, and a base, wherein the side-biased arc-shaped guide rail is fixed on the arc-shaped On the base, the base is set on the side-biased arc-shaped guide rail, and the side-biased arc-shaped worm gear is fixed at the middle and lower part of the base, and the side-biased worm is assembled on the side-biased motor. It is directly below the side-biased arc worm wheel, and the side-biased worm is meshed with the side-biased arc-shaped worm wheel;

②. The arc guide rail roll positioning mechanism is arranged on the base, which includes a roll arc guide rail, a bracket, a roll motor, a roll gear, a roll arc rack, and a mechanical transmission mechanism; The roll arc guide rail and the roll arc rack are respectively fixed above the base, the bracket is set on the roll arc guide rail, the roll motor and the mechanical transmission mechanism are fixed at the lower end of the support, and the roll gear is connected with the mechanical transmission mechanism. And mesh with the roll arc rack;

③. The double guide rail vertical loading positioning mechanism is arranged on the bracket, including a vertical loading motor, a vertical loading gear shaft, a mechanical transmission mechanism, parallel guide rails, a parallel rack, and a slide plate. The vertical loading motor is connected with a vertical loading gear The vertical loading gear shaft is connected with two mechanical transmission mechanisms, the parallel racks are set on the two mechanical transmission mechanisms, the parallel guide rails are fixed on the bracket, the slide plate is set on the parallel guide rails, and fixed with the parallel racks through the hinged support. even;

④. The six-component force sensor and driving and braking device assembly includes a rim adapter, a six-component force sensor, a flange, a driving and braking device fixing cover, an end cover, a driving and braking device, a belt and a pulley, of which six The front end of the component force sensor is provided with a rim adapter connected to the tire, the six-component force sensor is fixed on the flange, the driving brake device is coaxially connected with the six-component force sensor, and fixed by the drive brake device fixing cover and end cover, The rotating shaft of the six-component force sensor is externally connected to a belt and a pulley, and the externally connected to the pulley is an angular displacement sensor.

The utility model has the following advantages and beneficial effects:

1. The utility model adopts the above-mentioned structure, and only the arc-shaped guide rail mechanism is used for tire side deflection and roll motion. The structure is simple and reasonable, and it is easy to manufacture.

2. Capable of six-component force measurement to obtain comprehensive mechanical properties.

3. With steady-state and unsteady-state input of side deflection, roll, longitudinal slip and vertical load, it can carry out tests under various working conditions under high-speed motion.

4. It can keep the center of the tire footprint constant to ensure the accuracy of the test results.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of a high-speed tire testing machine with sideways and sideways with curved guide rails.

Fig. 2 is a schematic diagram of the A-direction projection of the positioning mechanism of the present invention.

Fig. 3 is a schematic diagram of the B-direction projection of the positioning mechanism of the present invention.

Fig. 4 is a schematic diagram of the lateral deviation positioning mechanism of the arc-shaped guide rail of the present invention.

Fig. 5 is a schematic diagram of the utility model arc guide rail roll positioning mechanism.

Fig. 6 is a schematic diagram of the dual guide rail vertical loading positioning mechanism of the present invention.

Fig. 7 is a structural schematic diagram of the six-component force sensor and the drive brake assembly of the present invention.

Fig. 8 is a schematic diagram of axes and planes involved in the present invention.

Detailed ways

As shown in attached drawings 1, 2, and 3: the testing machine includes an arc-shaped guide rail lateral deflection positioning mechanism (see Figure 4), an arc-shaped guide rail rollover positioning mechanism (see Figure 5), and a double-rail vertical loading positioning mechanism (see Figure 5). 6), six-component force sensor and drive brake assembly (see Figure 7), test drum 22.

The arc-shaped guide rail side bias positioning mechanism (see Figure 4) includes a side bias motor 1, a side bias worm 2, a side bias arc turbine 8, an arc base 3, 5, a side bias arc guide rail 4, 6, and a base Seat 7, wherein the side-biased arc guide rails 4,6 are fixed on the arc-shaped bases 3,5, the base 7 is arranged on the side-biased arc-shaped guide rails 4,6, and a side-biased arc-shaped The turbine 8 and the side yaw worm 2 are assembled on the yaw motor 1, and the mechanism composed of the yaw worm 2 and the yaw motor 1 is arranged directly below the side yaw arc rack 8, and the yaw worm 2 and the side yaw The arc turbine 8 is engaged.

The yaw motor 1, the yaw worm 2 and the yaw arc turbine 8 constitute a worm gear mechanism, the yaw motor 1 rotates to drive the yaw worm 2 to rotate, and the yaw worm 2 meshes with the yaw arc worm 8, so that the yaw worm 2 Rotate to make the side deflection arc-shaped turbine 8 and the base 7 rotate around the tire side deviation axis X, so as to realize the side deviation movement of the tire 21.

The arc guide rail roll positioning mechanism (see Figure 5) is set on the base 7, which includes roll arc guide rails 11, 20, bracket 9, roll motor 18, roll gear 13, roll arc Rack 17, mechanical transmission mechanism 19; described roll arc guide rails 11, 20 and roll arc rack 17 are respectively fixed above the base 7, and bracket 9 is arranged on roll arc guide rails 11, 20, The lower end of the support 9 is fixed with a roll motor 18 and a mechanical transmission mechanism 19 , and the roll gear 13 is connected with the mechanical transmission mechanism 19 and meshes with the roll arc rack 17 .

Described roll motor 18, roll gear 13, roll arc rack 17, and mechanical transmission mechanism 19 constitute a gear transmission mechanism, and roll motor 18 rotates and transmits moment to mechanical transmission mechanism 19, and mechanical transmission mechanism 19 again The torque is transmitted to the roll gear 13, so that the roll gear 13 rotates, and the roll gear 13 meshes with the roll arc-shaped rack 17, so that the roll gear 13 rotates to drive the bracket 9 and the tire 21 to move around the roll axis X The rotation of tire 21 realizes the rolling motion of tire 21.

The double guide rail vertical loading positioning mechanism (see Figure 6) is arranged on the bracket 9, including a vertical loading motor 12, a vertical loading gear shaft 26, a mechanical transmission mechanism 14, 15, a parallel guide rail 16, a parallel rack 25, and a slide plate 10 .

The vertical loading motor 12 is connected with a vertical loading gear shaft 26, and the vertical loading gear shaft 26 is connected with two mechanical transmission mechanisms 14, 15, and the parallel rack 25 is arranged on the two mechanical transmission mechanisms 14, 15. The parallel guide rail 16 is fixed on the bracket 9, and the slide plate 10 is arranged on the parallel guide rail 16, and is fixedly connected with the parallel rack 25 through a hinged support.

When the vertical loading motor 12 rotates, the torque is transmitted to the two mechanical transmission mechanisms 14, 15 by the rotation of the vertical loading gear shaft 26, and the two mechanical transmission mechanisms 14, 15 transmit the torque to the parallel rack 25, so that the parallel rack 25 The linear reciprocating motion drives the skateboard 10 and the tire 21 to perform a vertical loading motion to realize the vertical loading of the tire 21 .

As shown in accompanying drawing 7: the described six-component force sensor and driving brake device assembly includes rim adapter 27, six-component force sensor 28, flange plate 29, driving brake device fixed cover 30, end cover 31, drive Braking device 32, belt and pulley 33, wherein the front end of the six-component force sensor 28 is provided with a rim adapter 27 connected with the tire 21, the six-component force sensor 28 is fixed on the flange 29, and the driving braking device 30 and the six-component force Sensor 28 links to each other coaxially, and is fixed by drive braking device fixed cover 30 and end cap 31, and six-component force sensor 28 rotating shafts are externally connected with belt and pulley 33, and pulley is externally connected with angular displacement sensor.

The driving and braking device 32 realizes the driving of the tire 21 through forward rotation, and realizes the braking of the tire 21 through reverse rotation, thereby realizing the driving and braking control of the tire 21 .

As shown in Figure 8: the tire lateral motion axis X determined by the arc-shaped guide rail lateral bias positioning mechanism and the tire rolling motion axis Z determined by the arc-shaped guide rail lateral bias positioning mechanism intersect at a point P, and the road surface tangent determined by the test drum Plane α passes through point P, and the thickness of the test tire is adjusted through the rim adapter 27 to ensure that the rim center facet β in the tire width direction also passes through point P, so that point P coincides with the center of the footprint of the test tire, ensuring that the compound motion of the tire sideways and rolls The imprinted center P does not change during the test.

Claims (2)

1. arc-shaped guide rail lateral deviation inclination high-speed tire testing machine; It is characterized in that: this testing machine comprises arc-shaped guide rail lateral deviation detent mechanism, arc-shaped guide rail inclination detent mechanism, two guide rail vertical loading detent mechanisms; Six-component sensor and drive brake assembly, experimental drum;

1., described arc-shaped guide rail lateral deviation detent mechanism comprises lateral deviation motor, lateral deviation worm screw, lateral deviation arc turbine, arc-shaped base, lateral deviation arc-shaped guide rail, pedestal; Wherein the lateral deviation arc-shaped guide rail is fixed on the arc-shaped base; Pedestal is arranged on the lateral deviation arc-shaped guide rail; Middle lower portion at pedestal is fixed with lateral deviation arc turbine; The lateral deviation worm screw is assemblied on the lateral deviation motor, the mechanism that constitutes by lateral deviation worm screw and lateral deviation motor be arranged on lateral deviation arc turbine under, and the lateral deviation worm screw is meshed with lateral deviation arc turbine;

2., described arc-shaped guide rail inclination detent mechanism is arranged on the pedestal, it comprises the inclination arc-shaped guide rail, support, inclination motor, inclination gear, inclination arc-shaped rack, mechanical transmission mechanism; Described inclination arc-shaped guide rail and inclination arc-shaped rack are separately fixed at the pedestal top; Support is arranged on the inclination arc-shaped guide rail; The support lower end is fixed with inclination motor and mechanical transmission mechanism, and the inclination gear links to each other with mechanical transmission mechanism, and meshes with the inclination arc-shaped rack;

3., the described pair of guide rail vertical loading detent mechanism is arranged on the support, comprises vertical loading motor, vertical loading gear shaft, mechanical transmission mechanism, closed slide, parallel rack, slide plate; Described vertical loading motor is connected with the vertical loading gear shaft; The vertical loading gear shaft is connected with two mechanical transmission mechanisms; Parallel rack is arranged on two mechanical transmission mechanisms; Closed slide is fixed on the support, and slide plate is arranged on the closed slide, and is connected through hinged support and parallel rack;

4., described six-component sensor and drive brake assembly of devices comprise wheel rim adapter, six-component sensor, ring flange, drive brake device fixed cover, end cap, drive brake device, belt and belt pulley; Wherein the six-component sensor front end is provided with and the fixing wheel rim adapter of tire; Six-component sensor is fixed on the ring flange; The drive brake device links to each other with six-component sensor is coaxial; And fix outer lace of six-component sensor rear axle and belt pulley, the external angular displacement sensor of belt pulley through drive brake device fixed cover and end cap.

2. a kind of arc-shaped guide rail lateral deviation inclination high-speed tire testing machine according to claim 1; It is characterized in that: shown in the tire lateral deviation axis of movement X that confirms of arc-shaped guide rail lateral deviation detent mechanism meet at 1 P with the definite tire inclination axis of movement Z of arc-shaped guide rail lateral deviation detent mechanism; Section, the road surface α that experimental drum is confirmed is through some P; The adjusting of test tire through wheel rim adapter thickness guarantees that the wheel rim split β of tire cross direction is also through a some P; A P is overlapped with the trace center of testing tire, guarantee that the trace center P does not change when tire lateral deviation inclination compound motion is tested.

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