The present invention will be further described in detail below in conjunction with the drawings:
 Refer to figure 1 with figure 2 , The new-type gauge-changing bogie rail-changing function and reliability test bed of the present invention mainly includes a mobile platform power drive device 1, a translational gauge changing device 2, a load-bearing running rail 3, a limit device 4, Gantry suspension device 5; the mobile platform power drive device 1 is fixedly installed on the ground, and the longitudinal movement of the translational gauge changing device 2 is driven by the motor-crank connecting rod movement pair, and the translational gauge changing device 2 is paired The gauge-changeable wheelset is unlocked and locked, and provides a lateral guiding effect for the axial gauge-changeable movement of the wheelset along the axle; the load-bearing running rail 3 is installed symmetrically under both sides of the translational gauge changing device 2 , To provide load-bearing and longitudinal guidance; the limiting device 4 is symmetrically installed on both sides of the translational gauge changing device 2, and its linear reciprocating motion is horizontally aligned and vertically limited; The gantry suspension device 5 fixes the wheel set position of the bogie and unloads the wheel set.
 Refer to image 3 , The mobile platform power drive device 1 includes: motor 1-1, first coupling 1-2, reducer 1-3, second coupling 1-4, drive shaft 1-5, and No. 1 bearing 1-6, No. 1 bearing seat 1-7, No. 2 bearing 1-8, No. 2 bearing seat 1-9, turntable 1-10, connecting rod pin 1-11, connecting rod 1-12; the motor 1-1. Reducer 1-3, No. 1 bearing seat 1-7 and No. 2 bearing seat 1-9 are respectively fixed on the ground by anchor bolts; the output shaft of the motor 1-1 is through the No. 1 coupling The output shaft of the reducer 1-2 is connected with the input shaft of the reducer 1-3, and the output shaft of the reducer 1-3 is connected with the transmission shaft 1-5 through the second coupling 1-4. The transmission shaft 1-5 is supported on the first bearing seat 1-7 and the second bearing seat 1-9 through the No. 1 bearing 1-6 and the No. 2 bearing 1-8 respectively; the drive shaft 1-5 and the turntable 1-10 It is connected by a key; the function of the motor 1-1 is to transmit the power to the transmission shaft 1-5 after the speed reducer 1-3 reduces the speed and increases the torque, thereby driving the turntable 1-10 to rotate; the turntable 1-10 and the connecting rod One end of the shaft pin 1-11 is fixedly connected, and the other end of the connecting rod shaft pin 1-11 is movably connected with the connecting rod 1-12. A rolling bearing is added in the middle to ensure that the connecting rod 1-12 rotates relative to the connecting rod pin 1-11. The other end of the connecting rod 1-12 is hinged with the mobile platform 2-1, and the central axis of the turntable 1-10 is in the same plane as the horizontal center plane of the mobile platform 2-1, ensuring that the crank and connecting rod mechanism is centered, so that the mobile platform 2-1 maintains a uniform motion; the crank connecting rod mechanism converts the rotary motion of the turntable 1-10 into the linear translation motion of the mobile platform 2-1, and the direction of the linear motion is guaranteed by the positioning and guiding effect of the limit device 4; The longitudinal installation position of the mobile platform power driving device 1 described above ensures that the connecting rod does not interfere with the end of the translational gauge changing device 2 when it moves to the top dead center.
 Refer to Figure 4 to Figure 6 , The translational gauge changing device 2 includes a moving platform 2-1, a variable gauge guide rail 2-2, an unlocking and locking supporting device 2-3; the moving platform 2-1 consists of a standard square tube It is welded with a rectangular tube to achieve light weight, and the end of the mobile platform 2-1 is hinged with the connecting rod 1-12; the laying method of the variable gauge guide rail 2-2 on the mobile platform 2-1 is based on the gauge Differently divided into gauge A guide section 2-4 and gauge B guide section 2-5, the two gauge-variable guide rails 2-2 are arranged in an "eight" or reverse "eight" shape with reference to the center line. The gauge A and gauge B can be adjusted according to the test requirements of the gauge-changing bogie. The gauge-change guide rail 2-2 is fixed on the mobile platform 2-1 by bolts. The change of the gauge drives the wheels on both sides to the axle at the same time. Move inward or outward to realize the conversion of the wheelbase; the unlocking and locking supporting device 2-3 includes a supporting frame 2-3-1, an unlocking and locking rail 2-3-2 and a connecting plate 2-3-3 , The unlocking and locking rail 2-3-2 is welded to the support frame 2-3-1, and the installation position should be able to ensure that the small rollers on the gauge-variable wheel set locking device are exactly running in the rail, and with the moving platform 2- The reciprocating movement of 1, the locking mechanism of the gauge-changeable wheel pair completes the unlocking and locking actions according to the stroke change of the unlocking and locking rail 2-3-2, and the connecting plate 2-between each row of support frames 2-3-1 The 3-3 welding is a whole to improve the carrying capacity, and each row of support frames 2-3-1 is symmetrically welded on both sides of the upper surface of the mobile platform 2-1 at the specified distance.
 Refer to Figure 7 , The load-bearing running rail 3 includes a load-bearing roller 3-1 and a mounting seat 3-2, the load-bearing roller 3-1 is assembled on the side wall of the mounting seat 3-2, and the bottom of the load-bearing roller 3-1 and the mounting seat 3-2 There is a certain distance to ensure that the bearing roller 3-1 can rotate freely; when working, the bottom surface of the mobile platform 2-1 contacts the surface of the bearing roller 3-1 for reciprocating translation; the bearing rail 3 is installed symmetrically under both sides of the mobile platform 2-1 Its length ensures that the mobile platform 2-1 is always in contact with the surface of the bearing roller 3-1 during a reciprocating stroke.
 Refer to Figure 8 with Picture 9 , The limiting device 4 includes a transverse centering positioning rail 4-1, a vertical limiting device 4-2 and an auxiliary support column 4-3; the transverse centering positioning device 4-1 includes a roller 4-1 -1 and lateral support 4-1-2, the lateral support 4-1-2 is fixed on the inner side of the column 5-1 and auxiliary support column 4-3 of the gantry suspension device 5 with screws; the horizontal centering positioning rail 4 The surface of the roller 4-1-1 of -1 is in contact with the side of the mobile platform 2-1, which limits the lateral displacement of the mobile platform 2-1 when it moves longitudinally without jamming, so that the translational gauge changing device 2 is always centered along the center Linear reciprocating motion in the linear direction; the vertical limit device 4-2 includes a vertical limit rail 4-2-1 and a support connecting device 4-2-2, the vertical limit rail 4-2-1 includes The support roller 4-2-1-1 and the base 4-2-1-2, the base 4-2-1-2 and the support connection device 4-2-2 are welded together, and the support connection device 4-2-2 is screwed It is fixed on the inner side of the column 5-1 and the auxiliary support column 4-3 of the gantry type suspension device 5 to realize the fixed support of the vertical limit rail 4-2-1; the vertical limit rail 4-2- 1 The surface is in contact with the upper surface of the mobile platform 2-1 to limit the vertical displacement of the mobile platform 2-1 in the longitudinal movement without jamming, so that the lower surface of the mobile platform 2-1 is always with the bearing roller 3 of the bearing walking rail 3 -1 contact to make a linear reciprocating movement; the outer wall of the base 4-2-1-2 of the vertical limit rail 4-2-1 has a groove of 1~2mm to ensure that it is aligned with the horizontal positioning rail 4-1 The relative positions of the four auxiliary support columns 4-3 are installed uniformly along the outer side of the load-bearing walking rail 3, and their inner side and the inner side of the gantry column are in the same plane. The horizontal centering and positioning rail 4-1 It is installed symmetrically with the vertical limit device 4-2 on both sides of the mobile platform 2-1, and the length is the same as that of the bearing rail 3; the outer end surface of the bearing roller 3-1 of the bearing rail 3 and the vertical limit rail The outer end surface of the 4-2-1 support roller 4-2-1-1 is located in the same vertical plane to ensure the horizontal linear movement of the mobile platform 2-1.
 Refer to Picture 10 with Picture 11 The gantry type suspension device 5 includes a column 5-1, a support platform 5-2, a suspension beam 5-3, a lifting ring 5-4 and a T-slot connecting plate 5-5; the gantry type suspension The device 5 straddles the mobile platform 2-1, and its transverse centerline is in the same plane as the transverse centerline of the carrying rail 3 and the limit device 4; the lifting ring 5-4 is fixed to the T-slot connecting plate 5 by screws -5, the T-slot connecting plate 5-5 is welded to the suspension beam 5-3, the distance between the two rings 5-4 can be adjusted to meet the requirements of bogies of different structures, the size of the center hole of the two rings 5-4 According to the change of the shaft diameter of the variable gauge wheelset, its main function is to suspend and fix the position of the variable gauge wheelset, so that the wheelset can be suspended and unloaded to complete the unlocking, locking and gauge conversion actions.
 The described new-type gauge-changeable bogie rail-change function and reliability test bed is used to detect whether the gauge-changeable bogie can realize the rail-change function, and the gauge-change mechanism of the bogie is performed through cyclic rail-change actions. Reliability test and fatigue life test of gauge unlocking and locking mechanism, etc., the method mainly includes the following steps:
 Step 1: The gantry suspension device suspends and fixes the position of the wheel set, so that the wheel set is suspended and unloaded;
 Step 2: The mobile platform power drive device drives the translational gauge changing device to reciprocate along the load-bearing track, and the direction of movement is guaranteed by the positioning and guiding effect of the limit device;
 Step 3: Unlocking the gauge of the gauge-changeable bogie-the locking mechanism performs the gauge-unlocking and locking of the gauge-changeable bogie as well as the track change action according to the stroke change of the unlocking and locking rail. When the gauge is changed, the wheels on both sides are in Under the guide drive of the variable gauge guide rail, it moves inward or outward relative to the axle at the same time to realize the conversion of the wheel gauge. The reciprocating motion of the platform realizes the cyclic unlocking, locking and track changing actions, and the reliability of the gauge change test.