CN101936816B - OTR tire radial rigidity and simulated ground indentation test device - Google Patents

Abstract

The invention discloses an OTR tire radial rigidity and simulated ground indentation test device, comprising two OTR tires and a rotor drum driven by power; wherein the axes of the two OTR tires are parallel and are in the same horizontal line, the OTR tire is arranged on a horizontal thrust mechanism rotate to the rotor drum, a steel plate body simulating the ground is arranged between the rotor drum and the OTR tire, and the plate body is vertically hung on a workshop line hanging which is taken as a driving and reversing mechanism. In the invention, steel plate introduced by a driving and reversing mechanism is additionally added on the traditional OTR tire fatigue test device, the steel plate is jacked up by the OTR tire and rotor drum, and contact of the OTR tire and steel plate is namely simulation of motion state of tire on the ground, so that detection on tire radial rigidity and simulated ground indentation can be realized.

Description

Off-the-road tyre radial rigidity and simulation and ground indentation test device

(1) technical field:

The present invention relates to a kind of test unit, particularly a kind of off-the-road tyre radial rigidity and simulation and ground indentation test device.

(2) background technology:

Comprise in the intensity index of tire radial rigidity (tyre collapse degree) and with the area of indentation project on ground, be the important parameter of tire design, mainly reflect the distortion situation of tire tire under the static load situation, for the design of tire provides improvement project.

Along with off-the-road tyre to large scale development; Like the wheel rim nominal outside diameter is that 25 "～33 " (inch), tire overall diameter are less than 2 meters; It is 33 " more than (inch); the tire design overall diameter is more than 2 meters, and single tire load is at the giant engineering machinery tyre more than 20 tons that single tire load is lower than 20 tons large-scale engineering machinery tire and tyre rim nominal outside diameter.

For this reason and the test unit structural principle of design is very simple, the tire that carries corresponding load acted on the object that is similar to ground or metope get final product.But consider making large-scale or the giant tyre test unit, its structure is inevitable huge, must cause the increase of floor area and manufacturing cost.

Can utilize more existing large-scale or giant engineering machinery tyre test units to transform; As to transformation large-scale or the giant engineering machinery tyre fatigue experimental device; Make of the test of its compatibility, have realistic meaning reducing test unit floor area, reduction detection and manufacturing cost to tire radial rigidity and simulation and ground impression.Said engineering machinery wheel tire fatigue experimental device comprises power-actuated rotary drum, and engineering machinery wheel tire to be detected is advanced by horizontal thrust mechanism and is pressed on the rotary drum, and engineering machinery wheel tire and rotary drum are to rolling, till engineering machinery wheel tire is because of fatigue breakdown.

(3) summary of the invention:

The objective of the invention is to have proposed a kind of off-the-road tyre test unit; Be that the off-the-road tyre fatigue experimental device is transformed; Realization detects the off-the-road tyre radial rigidity under the static load and simulation and ground impression, for the optimal design of tire provides foundation.

Off-the-road tyre radial rigidity of the present invention and simulation and ground indentation test device; Comprise off-the-road tyre and by power-actuated rotary drum; Off-the-road tyre and by the parallel axes of rotary drum and be on the same horizontal line; Off-the-road tyre is located in the horizontal thrust mechanism of rotary drum advance and retreat motion, and different is that setting can be by off-the-road tyre and the plate body of rotary drum to pushing up between said rotary drum and the off-the-road tyre, and said plate body vertically is built up on the driving and reversing mechanism.

Plate body is by fixed to pushing up the back during test, and off-the-road tyre is pressed on the plate body, can obtain the data that tire radially is being crushed through checkout equipment; Because the friction between off-the-road tyre and the plate body, tire footprint is stayed on the plate body, and the impression width of measuring behind the EOT on the plate body calculates the vestige area.

Said driving and reversing mechanism is located at the horizontal line top, and plate body is hung on driving and reversing mechanism, and the linear velocity direction of rotary drum and plate body contact point is for from top to bottom.

For guaranteeing enough intensity, said plate body is selected steel plate for use.

According to the off-the-road tyre of different size specification, the height of used steel plate is 1000mm～2000mm, and width is 1000m m～1500mm, and thickness is 100mm～150mm.

For producing enough big thrust, said thrust mechanism is selected hydraulic mechanism for use.

Be simulation load in various degree, the pressure limit of said hydraulic mechanism should be regulated between 0～1100KN.

Can utilize the row in workshop to hang as described driving and reversing mechanism.

Advantage of the present invention:

1, off-the-road tyre radial rigidity of the present invention and simulation and ground indentation test device are on traditional off-the-road tyre fatigue experimental device, to set up a steel plate by the driving and reversing mechanism introducing; Steel plate by off-the-road tyre and rotary drum to the top after; Off-the-road tyre has promptly been simulated tire running status on the ground with contacting of steel plate, and the detection of tire radial rigidity and simulation and ground impression is achieved.

2, the multinomial test item of the compatible off-the-road tyre of the present invention, the test unit that characteristics such as the cost with increase is few, do not take unnecessary place, simple in structure, operation facility are large-scale or giant engineering machinery tyre is desirable.

(4) description of drawings

Fig. 1 is the structural representation of one embodiment of the present invention.

Fig. 2 is the vertical view of Fig. 1 embodiment.

Figure number sign: 1, off-the-road tyre; 2, rotary drum; 3, plate body; 4, hydraulic mechanism.

(5) embodiment content:

Be installed in the workshop in Fig. 1, the present invention shown in Figure 2; Be included in therotary drum 2 of fixed position;Rotary drum 2 is by power drive, and a side ofrotary drum 2 ishydraulic mechanisms 4 of horizontal arrangement, andhydraulic mechanism 4 is installed by power-actuated off-the-road tyre 1 towards the end ofrotary drum 2; The parallel axes of the axis of off-the-road tyre 1 androtary drum 2, both centers are on the same horizontal line.Utilize the row in workshop to hang as driving and reversing mechanism, hang asteel plate body 3 in the hook, makeplate body 3 in vertical state, the height ofplate body 3 is 1000mm～2000mm, and width is 1000mm～1500mm, and thickness is 100mm～150mm.

During on-test, off-the-road tyre 1 is inflated to standard pressure in advance and stops certain hour, and the row handling is exercisedplate body 3 and got between off-the-road tyre 1 and therotary drum 2, like Fig. 1, shown in Figure 2.Row hung out of service whenplate body 3 was close torotary drum 2; The linear velocity direction ofrotary drum 2 andplate body 3 contact points is for from top to bottom;Hydraulic mechanism 4 promotes off-the-road tyre 1 and is pressed on theplate body 3; (the rated pressure scope is 0～1100KN) and static maintenance certain hour to load to ratings, utilizes survey instrument to survey the profile height value after off-the-road tyre 1 distortion and is pressed in the impression area on theplate body 3.

1, said drawings radial rigidity can be expressed as: deflection ratio

Deflection ratio=pneumatic tyre section height * 100% when load in (section during 0 load after the height-distortion of pneumatic tyre section is high)/0.

The tire radial rigidity can characterize the tire anti-deformation, in order to optimize the tire design scheme.

2, said measurement impression area is investigated the tire grounding pressure, and is stressed to optimize the tire compound substance, and then optimal design.

Grounding pressure=load/impression area.

Claims (7)

1. off-the-road tyre radial rigidity and simulation and ground indentation test device; Comprise that two axial lines is parallel and be on the same horizontal line off-the-road tyre (1) and by power-actuated rotary drum (2); Off-the-road tyre (1) is located in the horizontal thrust mechanism of rotary drum (2) motion; It is characterized in that: the plate body (3) on simulation ground is set between said rotary drum (2) and the off-the-road tyre (1), and said plate body (3) vertically is built up on the driving and reversing mechanism.

2. off-the-road tyre radial rigidity according to claim 1 and simulation and ground indentation test device is characterized in that: said plate body (3) is hung on the driving and reversing mechanism above the said horizontal line; The linear velocity direction of said rotary drum (2) and plate body (3) contact point is for from top to bottom.

3. off-the-road tyre radial rigidity according to claim 2 and simulation and ground indentation test device is characterized in that: said plate body (3) is a steel plate.

4. off-the-road tyre radial rigidity according to claim 3 and simulation and ground indentation test device is characterized in that: the height of said steel plate is 1000mm～2000mm, and width is 1000m m～1500mm, and thickness is 100mm～150mm.

5. according to any described off-the-road tyre radial rigidity and simulation and ground indentation test device in the claim 1～4, it is characterized in that: said thrust mechanism is hydraulic mechanism (4).

6. off-the-road tyre radial rigidity according to claim 5 and simulation and ground indentation test device is characterized in that: the pressure limit of said hydraulic mechanism is 0～1100KN.

7. according to any described off-the-road tyre radial rigidity and simulation and ground indentation test device in the claim 1～4, it is characterized in that: said driving and reversing mechanism hangs for the workshop row.

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