CN105954049A - Double-roller type flexible chassis testing device - Google Patents

Abstract

The invention relates to a double-roller flexible chassis test device, which belongs to the field of vehicle engineering. In order to overcome the deficiencies of the existing chassis test device, the present invention sets a rotary platform and a differential mechanism with the center of rotation concentric with the offset steering shaft of the chassis under the four driving wheels of the test chassis, and a double-roller rotating mechanism is set on the platform to drive differential mechanism. The driving wheel of the test chassis is placed on the double-roller rotating mechanism to complete the test of the performance parameters of the test chassis. The flexible chassis test device disclosed by the present invention has the following advantages: (1) the structure is stable and the load capacity is strong; (2) the steering of the chassis steering shaft is followed by the double-roller differential rotation mechanism, and the driving process of the test chassis on the road surface is more accurately simulated (3) The structure is simple, which is convenient for simulation demonstration and control parameter test.

Description

A double-roller flexible chassis test device

technical field

The invention relates to a four-wheel independent drive independent steering chassis test device, belonging to the field of vehicle engineering, in particular to a four-wheel independent drive independent steering flexible chassis test equipment.

Background technique

With the continuous development of society, the number of vehicles is increasing, and the roads are somewhat narrow, and the space required for parking vehicles is becoming more and more tense. So in the process of parking or U-turn will cause vehicle jam phenomenon, its main cause is due to the incomplete function of existing vehicle steering gear.

Patent 200610104895.9 (publication number CN1948040) discloses a vehicle drive device, which improves the existing vehicle drive structure so that each wheel can be driven and turned.

Patent 200910021065.3 (publication number CN101480968) discloses an electric vehicle drive chassis, which is composed of hub motors, brakes, controllers, batteries, steering shafts, steering shaft braking electromagnetic friction locks, and steering shafts driving steering friction locks. , the locking torque of the electromagnetic friction lock of the steering shaft and the torque formed by the driving force of the wheel to the ground on the steering shaft are just in balance. When turning, the friction locking torque of the steering shaft decreases, and the locking torque of the steering shaft increases when braking. The function of four-wheel steering can be realized conveniently.

Patent 200910022569.7 (publication number CN101554883) discloses a chassis control device for electric vehicles. By installing a sensor with a balance position on each steering shaft, the sensor detects the position of the steering shaft to accelerate or decelerate the wheels.

Patent 200920033330.5 (publication number CN201395165) discloses an offset shaft drive wheel, which consists of a wheel with a hub motor whose turning surface is j and the centerline of the turning axis is k, and a steering pin shaft h that is not on the same plane as the wheel turning surface j constitute.

Patent 201220030280.7 (publication number CN202413906U) discloses a steering control device for electric vehicles. By setting a steering bridge on each wheel, the steering bridge is composed of a pair of active and follow-up variable resistors and two fixed resistors.

Patent 201320257374.2 (publication number CN 203241246U) discloses a four-wheel independent drive independent steering chassis test device that changes linear motion into circular motion. A center of rotation and a steering shaft of the driving wheel are set under each driving wheel of the test chassis The turntable mechanism with the center of rotation is concentric, and the test chassis is fixed on the turntable mechanism to complete the test of the performance parameters of the four-wheel independent drive independent steering chassis.

The offset shaft structure and four-wheel independent drive independent steering chassis disclosed in the above-mentioned patents improve the steering function of the vehicle, but there are many performance parameters of the chassis that need to be verified or obtained through experiments. The traditional test is carried out in the form of linear motion, but the steering shaft of the four-wheel independent drive independent steering chassis performs circular motion, and the linear motion test device is not only complicated in structure, but also has many inconveniences. The turntable type independently driven and independently steering chassis test bench disclosed in the above patent can change the linear motion of the flexible chassis into a circular motion, but due to the structural limitations of the turntable test bench, the chassis and the test bench cannot be tightly combined. As a result, many performance parameters of the chassis cannot be verified or obtained. In order to overcome the shortcomings of the existing test devices, the invention discloses a double-roller type four-wheel independent drive independent steering chassis test device that changes the linear motion into a rotary motion by changing the rotating speed of the flexible chassis driving wheels.

Contents of the invention

The technical solution for realizing the above invention is: under each drive wheel of the test chassis, a double-roller rotating mechanism with a center of rotation concentric with the center of rotation of the steering shaft of the chassis drive wheel is set, and the drive wheel of the test chassis is placed on the double-roller rotation mechanism. On top of the mechanism, the test of the performance parameters of the four-wheel independent drive independent steering chassis is completed. Concrete invention content is:

A double-roller flexible chassis test device is composed of a horizontal rotary platform, a double-roller rotating mechanism, a differential mechanism, a frame and a detection device, and is characterized in that: the horizontal rotary platform is composed of a vertical rotary shaft 22 and a bearing The revolving frame 5 installed on the vertical revolving shaft 22 and a pair of free wheels 11 supporting the revolving frame 5 at the other end are composed; The chassis drive wheel 4 drives the double roller 6 that rotates around the roller shaft 8, the horizontal shaft 13 installed on the slewing frame 5 with a bearing seat, the pinion 9 installed on the roller shaft 8 and the large gear installed on the horizontal shaft 13 10; the differential mechanism is composed of a small bevel gear 14 mounted on the horizontal shaft 13 and a large bevel gear 15 mounted on the vertical shaft 22;

Under the four driving wheels of the flexible chassis, a set of horizontal rotary platform, double-roller rotating mechanism and differential mechanism are respectively arranged; the left and right linkages of the four vertical rotary shafts 22 are driven by the engagement of the large bevel gear 15 and the linkage bevel gear 19; The front and rear linkage of the vertical rotary shaft 22 is driven by a pulley 21; the vertical rotary shaft 22 is connected with the large bevel gear 15 and the pulley 21 with a key, and the three rotate at the same speed;

The center line of the vertical rotary shaft 22 is concentric with the center line of the flexible chassis steering shaft 3 and is on the same straight line;

While the small bevel gear 14 rotates around the horizontal axis 13, at the moment when its rotational speed differs from that of the other small bevel gears, driven by the large bevel gear 15, the slewing frame 5 is driven to revolve around the vertical axis 22;

The left and right linkage bevel gears 19 are connected with the linkage shaft 20 with pivot pins, which are convenient for disassembly, and avoid movement interference caused by the left and right linkage bevel gears 19 turning differently when the test chassis turns to the test in situ.

The double-roller flexible chassis test device disclosed by the present invention has the following advantages:

(1) The double-roller test device is used to simulate the effect of the road surface and the test is more accurate;

(2) By changing the speed of the driving wheel to achieve the purpose of the steering of the double-roller turning mechanism, the test chassis is associated with the test bench, and the steering mechanism of the test chassis during driving on the road is accurately simulated;

(3) The front and rear and left and right double-roller rotation mechanisms are connected through the pulley and the associated bevel gear, and the movement of the test chassis during the steering process is accurately simulated.

Description of drawings

Figure 1 is a top view of the schematic diagram of the flexible chassis test device

Figure 2 is a structural schematic diagram of the double-roller rotation mechanism under one of the drive wheels

The meanings of the legend marks in the attached drawings are as follows:

1-steering arm, 2-friction lock, 3-steering shaft, 4-driving wheel, 5-slewing frame, 6-double roller, 7-roller bearing housing, 8-roller shaft, 9-small spur gear, 10-large Spur gear, 11-walking wheel, 12-horizontal shaft bearing seat, 13-horizontal shaft, 14-small bevel gear, 15-big bevel gear, 16-bottom bearing, 17-central shaft bearing, 18-frame, 19- Linkage bevel gear, 20-linkage shaft, 21-belt pulley, 22-central rotary shaft.

detailed description

Specific embodiments are given below in conjunction with the accompanying drawings.

One embodiment of the present invention is that under the driving force of each test chassis, a set of double-roller rotating mechanism is respectively set, and the double-roller rotating mechanism under the left front driving wheel of the test chassis is used as the object of illustration, and the double-roller rotating mechanism is driven by the supporting chassis. The wheel is composed of double rollers, the central axis of rotation and the slewing frame rotating around the central axis of rotation. The driving wheel 4 of the test chassis is carried on the top of the double roller 6, and the two ends are connected with the slewing frame 5 through the roller bearing seat 7; 6. The bottom is connected to the horizontal shaft through the horizontal shaft bearing seat 12, the traveling wheel 11 is set on the outside, and the inner side is connected to the central rotary shaft 22 through the central shaft bearing 17; the central rotary shaft 17 is fixed on the frame 18 through the bottom bearing 16, and the upper part is installed Belt pulley 21, large bevel gear 15 is installed in the bottom, turns to small bevel gear 14 is installed on the left side of large bevel gear 15, and associated bevel gear 19 is installed on the right side; Double roller 6 passes through roller shaft 8, small spur gear 9, large spur gear 10 and The horizontal shaft 13 is connected with the small bevel gear 14 to complete the power transmission; the center of the central rotary shaft 22 is concentric with the center of the chassis steering shaft 3; Revolution; the pulley 21 can link the central rotary shaft 22 of the front and rear double-roller rotating mechanism to ensure that the rotating speed of the front and rear central rotary shaft 22 is the same; Linkage together ensures that the rotating speeds of the left and right large bevel gears 15 are the same; the linkage bevel gear 19 and the linkage shaft 20 can be easily disassembled, so as to avoid the difference in the steering of the left and right linkage bevel gears 19 during the test of the test chassis. problem, to ensure the smooth progress of the in-situ steering test.

As shown in the figure, put the test chassis driving wheel 4 on the double roller 6, lock the friction lock 2, start the test chassis driving wheel 4, then the double roller 6 will rotate accordingly, and then drive the small spur gear 9, the large straight The gear 10 rotates, thereby driving the small bevel gear 14 to rotate through the horizontal shaft 13, and the large bevel gear 15 will rotate accordingly. The central rotary shaft 22 rotates together with the large bevel gear 15, and the pulley 21 ensures that the front and rear double rollers are driven by a belt drive. The central rotary shaft 22 rotating speeds of the turning mechanism are equal, and the linkage bevel gear 19 guarantees that the large bevel gear 15 rotating speeds of the left and right two double-roller turning mechanisms are equal by the linkage shaft 20, and then the large bevel gear 15 rotating speeds of the double-roller turning mechanism under each drive wheel are equal. Equal, now can carry out the test of the straight running performance of the test chassis; when changing the rotating speed of the front left and right drive wheels 4, unlocking the friction lock, then through the gear rotation, the speed of the small bevel gear 14 will change, and the large bevel gear 15 due to Be subjected to the effect of belt pulley 21 and associated bevel gear 20, speed will keep constant, then small bevel gear 14 will drive slewing frame 5 to rotate around central rotary shaft 22 through walking wheel 11, and drive wheel will also be around it at the same time Steering shaft 3 is rotated, and the speed of rotation is the same as the speed of rotation of slewing frame 5, and because the steering shaft 3 of the central rotating shaft 22 and the chassis drive wheel is concentric, then the performance test of the test chassis steering can be carried out at this time.

Another embodiment of the present invention is to change the pulley 21 into a sprocket, and the belt into a chain. Meanwhile, the embodiment of the present invention can also arrange the sprocket under the large bevel gear 15 . And so on, under the premise that the basic principle of the present invention remains unchanged, various changes made in the structural arrangement and structure will be regarded as the implementation examples of the present invention.

Claims (5)

1. a double-roll type flexible chassis assay device, by horizontal rotation platform, double roller rotating mechanism, differential Mechanism, frame and detection device are constituted, and it is characterized in that: described horizontal rotation platform by vertical axis of rotation (22), Reversing frame (5) and the other end that one end bearing is arranged on vertical axis of rotation (22) support reversing frame (5) A pair freewheel (11) composition；Described double roller rotating mechanisms are by being arranged on reversing frame (5), supporting Flexible chassis driving wheel (4) and driven by flexible chassis driving wheel (4), around roller axle (8) rotate double Roller (6), the trunnion axis (13) being arranged on bearing block on reversing frame (5), it is arranged in roller axle (8) Little gear (9) and be arranged on trunnion axis (13) gear wheel (10) composition；Described differential attachment By the bevel pinion (14) being arranged on trunnion axis (13) and be arranged on vertical axis of rotation (22) big Bevel gear (15) forms.

Double-roll type flexible chassis assay device the most according to claim 1, is characterized in that at flexible chassis Four driving wheels under a set of horizontal rotation platform, double roller rotating mechanism and differential attachment are respectively set；Four hang down The left and right linkage bevel gear wheel (15) of straight gyrus rotating shaft (22) engages driving with linkage bevel gear (19)； Before and after four vertical axis of rotations (22), linkage belt pulley (21) transmission drives mutually；Described is vertical Between gyroaxis (22) and bevel gear wheel (15) and belt pulley (21) by keying even, the synchronized rotation of three.

Double-roll type flexible chassis assay device the most according to claim 1, is characterized in that vertical axis of rotation (22) centrage is concentric with the centrage of flexible chassis steering spindle (3), on same straight line.

Double-roll type flexible chassis assay device the most according to claim 1, is characterized in that bevel pinion (14) While trunnion axis (13) rotation, there is, greatly the moment of differential at its rotating speed and remaining bevel pinion Under the driving of bevel gear (15), reversing frame (5) is driven to revolve round the sun around vertical axis of rotation (22).

Double-roll type flexible chassis assay device the most according to claim 1, is characterized in that left and right linkage cone It is connected with pivot pin between gear (19) with universal driving shaft (20), convenient dismounting, it is to avoid in test base plate original place During steering test, owing to left and right linkage bevel gear (19) turns to difference to cause movement interference.