WO2023155479A1

WO2023155479A1 - Power switching system of rack rail vehicle, power switching method and railway vehicle

Info

Publication number: WO2023155479A1
Application number: PCT/CN2022/128633
Authority: WO
Inventors: 曲琅博; 廖志伟; 张冲; 张骏; 李小川; 龚卫
Original assignee: 中车株洲电力机车有限公司
Priority date: 2022-02-17
Filing date: 2022-10-31
Publication date: 2023-08-24
Also published as: CN114439889B; CN114439889A

Abstract

A power switching system of a rack rail vehicle, comprising a power switching device (5), and a rack rail driving gear (2), an axle driving gear (3) and a power gear (4) that are mounted on an axle (1) at intervals. The power switching device (5) comprises a first gear ring (51), a second gear ring (52) and an axial driving mechanism (53). An inner gear of the first gear ring (51) is engaged with an outer gear of the rack rail driving gear (2), and an inner gear of the second gear ring (52) is engaged with an outer gear of the axle driving gear (3). The power gear (4) is provided between the rack rail driving gear (2) and the axle driving gear (3), and two side surfaces of the power gear (4) can be engaged with opposite side surfaces of the first gear ring (51) and the second gear ring (52) by means of splines (9), respectively. The axial driving mechanism (53) can drive the first gear ring (51) and the second gear ring (52) to move in the axial direction at the same time, such that the power gear (4) is engaged with the first gear ring (51) or the second gear ring (52). The axial driving mechanism (53) can drive the first gear ring (51) and the second gear ring (52) to move at the same time, such that stable power switching of the rack rail vehicle is realized, and the structure is simpler and more reliable. Also disclosed are a method for switching power of the power switching system of the rack rail vehicle and a railway vehicle equipped with the power switching system of the rack rail vehicle.

Description

A rack car power switching system and power switching method, rail vehicle

Cross References to Related Applications

This application claims the priority of Chinese patent application CN202210145537.1 filed on February 17, 2022, the entire content of which is incorporated herein by reference.

technical field

The invention relates to a rack car power switching system, a power switching method and a rail vehicle, belonging to the technical field of rail vehicles.

Background technique

At present, domestic rack cars are in their infancy. How to realize the coaxial drive of the rack drive gear and the axle drive gear of the rack car and realize the mutual switching of power is a difficult point. When the rack car passes through the climbing road section, the rack car is driven by the rack driving gear; when the rack car passes the flat road section, the rack car is driven by the axle driving gear.

Chinese Invention Patent Application Publication No. CN108167398A discloses a rack train power switching device, so that the rack drive and the wheel-rail drive of the rack train form two independent states, and only one state works at any time, avoiding the axle The phenomenon of stuck occurs, and there is no idling energy consumption. It includes rack drive gears fixedly installed on the axles at intervals, axle drive gears, and a main drive shaft on which a power switching device is arranged. The power switching device includes a rack transmission gear, an axle transmission gear, a power sliding sleeve and an operating mechanism. The rack drive gear and the axle drive gear are mounted on the main transmission shaft with empty sleeves, and the power slip sleeve is located between the rack drive gear and the axle drive gear, and forms an axial sliding connection with the main drive shaft through splines. A rotational speed synchronous clutch mechanism is arranged between the end faces adjacent to the rack transmission gear and the axle transmission gear on both sides of the power sliding sleeve. The operating mechanism manipulates the power slip sleeve to move axially along the main transmission shaft, and transmits power to the rack drive gear through the speed synchronous clutch mechanism, or transmits power to the axle drive gear. The switching device has a complex structure and low stability.

Chinese invention patent CN106481686B discloses a rack car driving device and its clutch structure, and a rack car driving method, which realizes power transmission between the sixth gear and the axle through the clutch between the sixth gear and the hub of the friction plate clutch Or don't deliver power. This kind of friction plate clutch needs a hydraulic cylinder to work, and the structure is relatively complicated. After the sixth gear and the axle start to transmit power, the clutch still needs to continue to work to ensure that the power is not interrupted. The stability of power transmission will be affected by the fluctuation of the clutch oil pressure, resulting in The service life of the switching device is adversely affected.

Contents of the invention

Aiming at the problems existing at present and the deficiencies of the prior art, the present invention provides a rack car power switching system, which can realize the smooth switching between the rack drive gear and the axle drive gear.

In order to achieve the above object, the technical solution adopted in the present invention is:

A power switching system for a rack car, comprising a power switching device and rack drive gears, power gears and axle drive gears sequentially installed on the axle at intervals;

The power switching device includes a first ring gear, a second ring gear and an axial drive mechanism, the inner gear of the first ring gear meshes with the outer gear of the rack drive gear, the second ring gear The internal gear meshes with the external gear of the axle drive gear; the axial drive mechanism is used to drive the first ring gear and the second ring gear to move axially, so that the power gear and the first ring gear, One of the following three states between the second ring gear:

a), the power gear meshes with the first ring gear through a spline, and the power gear, the first ring gear and the rack drive gear are meshed and transmitted to be in the rack gear;

b), the power gear is meshed with the second ring gear through the spline, and the power gear, the second ring gear and the axle drive gear are meshed and transmitted to be in the sticking gear;

c) The power gear is in neutral gear without meshing with the first ring gear and the second ring gear.

During operation, the power of the power gear is transmitted to the rack drive gear through the first ring gear or transmitted to the axle drive gear through the second ring gear.

When the axial driving mechanism drives the first ring gear and the second ring gear to move axially at the same time, so that the power gear meshes with the spline on the side of the first ring gear, because the inner gear of the first ring gear and the second ring gear The outer gears of the rack drive gear are meshed, the power of the power gear can be transmitted to the rack drive gear through the first ring gear, and the rack drive gear drives the axle to move;

When the axial drive mechanism drives the first ring gear and the second ring gear to move axially at the same time, so that the power gear meshes with the splines on the side of the second ring gear, because the inner gear of the second ring gear and the second ring gear The external gears of the axle drive gear are meshed, the power of the power gear can be transmitted to the axle drive gear through the second ring gear, and the axle drive gear drives the axle to move;

If the axle needs to be in a static state, the axial drive mechanism can drive the first ring gear and the second ring gear to move axially at the same time, so that the splines on the side of the power gear are connected to the first ring gear and the second ring gear None of the side splines mesh. At this time, the power of the power gear cannot be transmitted. Simultaneously drive the movement of the first ring gear and the second ring gear through the axial drive mechanism to realize the smooth power switching of the rack car, and the structure is simpler and more reliable.

The axial driving mechanism of the present invention only provides active force when switching, which greatly prolongs the service life of the switching device.

Preferably, the axial drive mechanism includes a first shift fork, a second shift fork, a first support shaft and a power shaft, the power shaft is connected to the output end of the motor; one end of the first shift fork is connected to the The outer side of the first gear ring and one end of the second shift fork are connected to the outer side of the second gear ring through a card slot; the other end of the first shift fork is fixedly connected with a first sleeve, the The other end of the second shift fork is fixedly connected with a second sleeve, and the first shift fork, the second shift fork, the first sleeve and the second sleeve are all sleeved on the first support shaft; Both the first sleeve and the second sleeve are provided with guide pins, and guide grooves are respectively provided on the corresponding power shafts, and the guide pins can move along the guide grooves respectively; when the motor drives the power shaft to rotate, The guide groove drives the guide pin to move along the axis of the first support shaft, so that the first shift fork and the second shift fork move along the axis of the support shaft. When driving the power shaft to rotate by the rotation of the motor output like this, the guide groove on the power shaft drives the guide pin to move. The movement of the guide pin is a composite movement of axial movement and circumferential rotation along the power shaft, so that the first sleeve and the second sleeve do reciprocating linear motion along the first support shaft, so that the first shift fork and the second The shift fork performs linear reciprocating motion along the first support shaft, thereby realizing axial linear motion of the first ring gear and the second ring gear.

In order to control the power switching of the rack car more directly, the axial drive mechanism also includes an elastic stopper, the elastic stopper includes a spring and a ball head arranged at one end of the spring; the power shaft is provided with gear control Collar, the gear control collar is sequentially provided with rack gear slots, neutral gear slots and axle gear slots along the circumferential direction; when the power shaft rotates, the ball head can be respectively connected with the gear The rail gear draw-in slot, the neutral gear draw-in slot and the axle gear draw-in slot are snapped together.

Thus, when the ball head engages with the rack gear slot, the power gear meshes with the splines on the side of the first ring gear, and the power of the power gear is transmitted to the The rack drive gear drives the axle to move; when the ball head engages with the neutral slot, the splines on the side of the power gear and the sides of the first ring gear and the second ring gear None of the splines are meshed; when the ball head is engaged with the axle gear slot, the power gear meshes with the splines on the side of the second ring gear, and the power of the power gear passes through the second The ring gear transmits to the axle drive gear, which drives the axle to move. By setting the elastic stopper, the power switching of the rack car is more direct and convenient. After each gear is adjusted in place, the ball head of the elastic stopper is stuck in the corresponding slot of the gear control collar to ensure that the first shift fork and the second shift fork do not move axially.

Specifically, the first support shaft is arranged parallel to the power shaft.

Preferably, the axial drive mechanism further includes a second support shaft, the second support shaft is arranged parallel to the first support shaft; the other end of the first shift fork is also fixedly connected with a third sleeve, the The other end of the second shift fork is also fixedly connected with a fourth sleeve, and the first shift fork, the second shift fork, the third sleeve and the fourth sleeve are all sleeved on the second support shaft. By arranging two sleeves on the first shift fork and the second shift fork respectively, the shift fork is more stable and reliable when moving in the axial direction.

Specifically, the guide pins are respectively arranged on the first sleeve and the fourth sleeve or the second sleeve and the third sleeve, and the corresponding guide grooves are respectively provided on the power shaft, so The guide pins can respectively move along the guide grooves; when the motor drives the power shaft to rotate, the guide grooves drive the guide pins to move along the axes of the first support shaft and the second support shaft at the same time. The guide pins are respectively arranged on the first sleeve and the fourth sleeve or the second sleeve and the third sleeve, and this staggered and symmetrical arrangement will make the device more beautiful.

Specifically, the lengths of the first sleeve and the fourth sleeve are equal, the lengths of the second sleeve and the third sleeve are equal, and the first sleeve, the second sleeve, the The diameters of the third sleeve and the fourth sleeve are equal.

Specifically, the length of the first support shaft is equal to that of the second support shaft.

Specifically, the rack drive gear, the axle drive gear and the power gear, the power switching device and the elastic stopper are all arranged in a box.

Based on the same inventive concept, the present invention also provides a method for switching power by using the power switching system of the above-mentioned rack car, specifically:

i. When the rack car needs to be in the rack gear, start the axial drive mechanism to drive the first ring gear to move axially, so that the first ring gear and the opposite side of the power gear are meshed through splines, and the power of the power gear is passed through The first ring gear is transmitted to the rack drive gear, so that the rack car is in the rack gear state;

ii. When the rack car needs to be in neutral, start the axial drive mechanism to drive the first ring gear and the second ring gear to move axially, so that the splines on the side of the power gear are not in contact with the first ring gear and the second ring gear The splines on the side are meshed, and the power of the power gear cannot be transmitted, so that the rack car is in a neutral state;

iii. When the rack car needs to be in the sticking gear, start the axial drive mechanism to drive the second ring gear to move axially, so that the second ring gear meshes with the opposite side of the power gear through splines, and the power of the power gear passes through The second ring gear transmits to the axle drive gear, so that the rack car is in the sticking gear state.

Based on the same inventive concept, the present invention also provides a rail vehicle, including a bogie and a driving device located in the bogie; the driving device is equipped with the above-mentioned rack car power switching system;

When the switching device is placed in the rack gear, the power is transmitted to the rack wheel through the driving device, the vehicle passes through the rack wheel, and the vehicle obtains traction through the meshing of the rack wheel and the rack;

When the switching device is placed in the sticking gear, the power is transmitted to the wheels through the driving device, and the vehicle obtains traction through the friction between the wheels and the rail.

Compared with prior art, the beneficial effect of the present invention is:

The rack car power switching system realizes the power switching of the rack car smoothly through the axial drive mechanism. The axial drive mechanism converts the rotation of the electric power into a linear motion along the axial direction, and the structure is simpler and more reliable.

Compared with the friction plate clutch introduced by CN106481686B, the switching of the present invention does not require a hydraulic cylinder, and the structure is simpler and more reliable. Moreover, after switching to sticking power, the switching device does not need to continue to work, and only provides force at the moment of switching, which greatly prolongs the Service life of switching devices.

Description of drawings

Fig. 1 is a schematic diagram of power switching between rack drive gear and axle drive gear according to an embodiment of the present invention;

Fig. 2 is a perspective view of Fig. 1;

Fig. 3 is an exploded view of the axial drive mechanism in Fig. 1;

Fig. 4 is a schematic diagram of the connection between the axial drive mechanism and the box in Fig. 3;

Fig. 5 is a schematic diagram of the first shift fork in Fig. 3;

Fig. 6 is a schematic diagram of the second shift fork in Fig. 3;

Fig. 7 is a schematic diagram of the power shaft in Fig. 3;

Fig. 8 is a schematic diagram of the connection between the power shaft and the elastic stopper in Fig. 3;

Fig. 9 is a schematic diagram of the connection between the shift fork and the ring gear in Fig. 1;

Fig. 10 is a schematic diagram of the present invention applied to a rack bogie.

In the picture

1-axle, 2-rack drive gear, 3-axle drive gear, 4-power gear, 5-power switching device, 51-first ring gear, 52-second ring gear, 53-axial drive mechanism, 531 -First shift fork, 532-Second shift fork, 533-First support shaft, 534-Power shaft, 535-Motor, 536-First sleeve, 537-Second sleeve, 538-Guide pin, 539- Guide groove, 5310-second support shaft, 5311-third sleeve, 5312-fourth sleeve, 6-elastic stopper, 61-spring, 62-ball head, 7-gear control collar, 71-tooth Rail gear slot, 72-neutral gear slot, 73-axle gear slot, 8-cabinet, 9-spline; 8-bogie, 81-driving device, 82-rack wheel, 83-wheel.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. For the convenience of description, if the words "up", "down", "left" and "right" appear in the following, it only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure.

Example 1

As shown in FIG. 1 and FIG. 2 , the rack car power switching system of this embodiment includes a power switching device 5 and a rack drive gear 2 , an axle drive gear 3 and a power gear 4 installed on the axle 1 at intervals. The power switching device 5 includes a first ring gear 51, a second ring gear 52 and an axial drive mechanism 53, the inner gear of the first ring gear 51 meshes with the outer gear of the rack drive gear 2, so The internal gear of the second ring gear 52 meshes with the external gear of the axle drive gear 3 . The power gear 4 is arranged between the rack drive gear 2 and the axle drive gear 3 , and splines 9 are arranged on both sides of the power gear 4 .

As shown in Figure 3, the axial drive mechanism 53 includes a first shift fork 531, a second shift fork 532, a first support shaft 533, a second support shaft 5310, a power shaft 534 and an elastic stopper 6, the power The shaft 534 is connected to the output end of the motor 535 . One end of the first shift fork 531 is fixedly connected with a first sleeve 536 and a third sleeve 5311 , and one end of the second shift fork 532 is fixedly connected with a second sleeve 537 and a fourth sleeve 5312 . Both the first sleeve 536 and the second sleeve 537 are sleeved on the first support shaft 533 , and the first sleeve 536 and the second sleeve 537 can slide axially along the first support shaft 533 . Both the third sleeve 5311 and the fourth sleeve 5312 are sleeved on the second support shaft 5310 , and the third sleeve 5311 and the fourth sleeve 5312 can slide axially along the second support shaft 5310 . The length of the first sleeve 536 is equal to that of the fourth sleeve 5312, the length of the second sleeve 537 is equal to that of the third sleeve 5311, the first sleeve 536, the second sleeve 537, the third sleeve 5311 and the fourth sleeve 5312 have the same diameter. The first support shaft 533 , the second support shaft 5310 and the power shaft 534 are arranged in parallel and have equal lengths. Both the first sleeve 536 and the fourth sleeve 5312 are provided with guide pins 538, corresponding to the power shaft 534 are respectively provided with guide grooves 539, the guide pins 538 are arranged in the guide grooves 539 and can be positioned along the guide grooves. 539 movement. The guide groove 539 is a curved groove composed of the axial movement curve along the power shaft 534 and the circumferential movement curve around the power shaft 534. When the motor 535 drives the power shaft 534 to rotate, the guide groove 539 can drive the guide pin 538 to move axially. , thereby driving the first sleeve 536 and the fourth sleeve 5312 to move axially. A gear control collar 7 is provided on the power shaft 534 , and the gear control collar 7 can be engaged with the elastic stopper 6 .

As shown in FIG. 4 , the axial driving mechanism 53 is arranged in the box body 8 , which can effectively protect the axial driving mechanism 53 and the components connected thereto.

As shown in Figure 5, the ends of the first shift fork 531 are respectively fixedly connected with the first sleeve 536 and the third sleeve 5311 by four bolts, and the first sleeve 536 is provided with a guide pin 538 . As shown in FIG. 6 , the ends of the second shift fork 532 are respectively fixedly connected with the second sleeve 537 and the fourth sleeve 5312 by four bolts, and the fourth sleeve 5312 is provided with a guide pin 538 .

As shown in Figures 7 and 8, guide grooves 539 are respectively provided on the power shaft 534, and a gear control collar 7 is arranged in the middle of the power shaft 534, and the gear control collar 7 is sequentially arranged along the circumferential direction. A rack gear slot 71, a neutral gear slot 72 and an axle gear slot 73 are provided. The elastic stopper 6 includes a spring 61 and a ball head 62 arranged at the end of the spring 61. The ball head 62 can be connected to the rack gear slot 71, the neutral gear slot 72 and the axle gear slot 73 respectively. Card access. The power shaft 534 is driven by the motor 535 so that the ball head 62 is engaged with the rack gear slot 71, so that one side of the power gear 4 meshes with the first ring gear 51 through the spline 9, and the power gear 4 drives the rack The driving gear 2 works to make the axle shaft 1 rotate; the power shaft 534 is driven by the motor 535 so that the ball head 62 is engaged with the neutral slot 72, so that both sides of the power gear 4 are not in contact with the first ring gear 51 and the second ring gear. 52, the power of the power gear 4 cannot be transmitted so that the axle 1 cannot rotate; the power shaft 534 is driven by the motor 535 so that the ball head 62 is engaged with the axle gear slot 73, so that one side of the power gear 4 is in contact with the first The two ring gears 52 are meshed through the splines 9, and the power gear 4 drives the axle drive gear 3 to work so that the axle 1 rotates. By arranging the elastic stopper 6 to engage with different gear slots, the power switching of the rack car is realized. After each gear is adjusted in place, the ball head 62 is stuck in the corresponding slot of the gear control collar 7 to ensure that the first shift fork 531 and the second shift fork 532 do not move axially.

As shown in FIG. 9 , the other end of the first shift fork 531 is connected to the outside of the first ring gear 51 and the other end of the second shift fork 532 is connected to the outside of the second ring gear 52 through clamping. Slot connection, the first ring gear 51 and the second ring gear 52 can move axially along with the first shift fork 531 and the second shift fork 532 . The opposite sides of the first ring gear 51 and the second ring gear 52 are provided with splines 9, and the two sides of the power gear 4 can be opposite to the first ring gear 51 or the second ring gear 52 respectively. The sides are engaged by splines 9.

When the rack car needs to be in the rack gear, the starter motor 535 rotates to drive the power shaft 534 to rotate, so that the ball head 62 is engaged with the rack gear slot 71 . The circumferential rotation of the power shaft 534 makes the guide pin 538 move linearly in the axial direction through the guide groove 539, so that the first sleeve 536 and the fourth sleeve 5312 move linearly in the axial direction, and the first dial connected thereto The fork 531 and the second shift fork 532 move linearly along the axial direction at the same time, so that the first ring gear 51 meshes with the opposite side of the power gear 4 through the spline 9, and the power of the power gear 4 is transmitted to the The rack drive gear 2 makes the rack car be in the rack gear state.

When the rack car needs to be in neutral gear, the starter motor 535 rotates to drive the power shaft 534 to rotate, so that the ball head 62 is engaged with the neutral gear slot 72 . The circumferential rotation of the power shaft 534 makes the guide pin 538 move linearly in the axial direction through the guide groove 539, so that the first sleeve 536 and the fourth sleeve 5312 move linearly in the axial direction, and the first dial connected thereto The fork 531 and the second shift fork 532 move linearly along the axial direction at the same time, so that the splines 9 on the side of the power gear 4 do not mesh with the splines 9 on the sides of the first ring gear 51 and the second ring gear 52, and the power gear 4 The power of the rack cannot be transmitted, so that the rack car is in a neutral state.

When the rack car needs to be in the axle gear (adhesive gear), the starter motor 535 rotates to drive the power shaft 534 to rotate, so that the ball head 62 is engaged with the axle gear draw-in groove 73 . The circumferential rotation of the power shaft 534 makes the guide pin 538 move linearly in the axial direction through the guide groove 539, so that the first sleeve 536 and the fourth sleeve 5312 move linearly in the axial direction, and the first dial connected thereto The fork 531 and the second shift fork 532 move linearly along the axial direction at the same time, so that the second ring gear 52 meshes with the opposite side of the power gear 4 through the spline 9, and the power of the power gear 4 is transmitted to the The axle drive gear 3 makes the rack car be in the axle gear state.

Example 2

As shown in FIG. 10 , the difference from Embodiment 1 is that the switching device 5 is installed inside the driving device 81 , and the driving device 81 is installed in the bogie 8 . If the switching device 5 is placed in the "rack gear", the power is transmitted to the rack wheel 82 through the driving device 81, and the vehicle obtains traction by meshing the rack wheel 82 with the rack. If the switching device 5 is placed in "adhesive gear", the power is passed to the wheel 83 through the driving device 81, and the vehicle obtains the traction force through the friction between the wheel 83 and the rail, and the traction vehicle advances.

The content of the above-mentioned embodiments should be understood as that these embodiments are only used to illustrate the present invention more clearly, and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art will understand the various equivalents of this embodiment Modifications in form all fall within the scope defined by the appended claims of the present invention.

Claims

A power switching system for a rack car, comprising a power switching device (5) and a rack drive gear (2), a power gear (4) and an axle drive gear (3) sequentially installed on the axle (1) at intervals, its features in:

The power switching device (5) includes a first ring gear (51), a second ring gear (52) and an axial drive mechanism (53), the internal gear of the first ring gear (51) is connected to the rack The external gear of the drive gear (2) is meshed, and the internal gear of the second ring gear (52) is meshed with the external gear of the axle drive gear (3);

The axial drive mechanism (53) is used to drive the first ring gear (51) and the second ring gear (52) to move axially, so that the power gear (4) and the first ring gear (51) , and the second ring gear (52) are in one of the following three states:

a), the power gear (4) meshes with the first ring gear (51) through a spline (9), and the power gear (4), the first ring gear (51) and the rack drive gear (2 ) between the meshing transmission and in the rack gear;

b), the power gear (4) is meshed with the second ring gear (52) through the spline (9), and the power gear (4), the second ring gear (52) and the axle drive gear (3) are meshed for transmission while in sticky gear;

c) The power gear (4) is not in mesh with the first ring gear (51) and the second ring gear (52) and is in neutral gear.
The rack car power switching system according to claim 1, characterized in that: the axial drive mechanism (53) includes a first shift fork (531), a second shift fork (532), a first support shaft (533 ) and a power shaft (534), the power shaft (534) is connected to the output end of the motor (535); one end of the first shift fork (531) is connected to the outside of the first ring gear (51) and One end of the second shift fork (532) is connected to the outside of the second ring gear (52) through a card slot; the other end of the first shift fork (531) is fixedly connected to the first sleeve (536 ), the other end of the second shift fork (532) is fixedly connected with the second sleeve (537), the first shift fork (531), the second shift fork (532), the first sleeve (536) and the second sleeve (537) are sleeved on the first support shaft (533); the first sleeve (536) and the second sleeve (537) are provided with guide pins (538), Corresponding to the power shaft (534), guide grooves (539) are respectively provided, and the guide pins (538) can move along the guide grooves (539); when the motor (535) drives the power shaft (534) to rotate , the guide groove (539) drives the guide pin (538) to move along the axis of the first support shaft (533), so that the first shift fork (531) and the second shift fork (532) move along the Axial movement of the support shaft (533).
The rack car power switching system according to claim 2, characterized in that: the axial drive mechanism (53) also includes an elastic stopper (6), and the elastic stopper (6) includes a spring (61) and The ball head (62) arranged at one end of the spring (61); the power shaft (534) is provided with a gear control collar (7), and the gear control collar (7) is sequentially provided with teeth along the circumferential direction rail gear slot (71), neutral gear slot (72) and axle gear slot (73); when the power shaft (534) rotates, the ball head (62) can be connected with the rack gear respectively Draw-in slot (71), neutral gear draw-in slot (72) and axle gear draw-in slot (73) are snapped together.
The rack car power switching system according to claim 2, characterized in that: the first support shaft (533) is arranged parallel to the power shaft (534).
The rack car power switching system according to claim 2, characterized in that: the axial drive mechanism (53) further includes a second support shaft (5310), and the second support shaft (5310) is connected to the first support shaft The shafts (533) are arranged in parallel; the other end of the first shift fork (531) is also fixedly connected with a third sleeve (5311), and the other end of the second shift fork (532) is also fixedly connected with a fourth sleeve cylinder (5312), the first shift fork (531), the second shift fork (532), the third sleeve (5311) and the fourth sleeve (5312) are sleeved on the second support shaft (5310 )superior.
The rack car power switching system according to claim 5, characterized in that: the guide pins (538) are respectively arranged on the first sleeve (536) and the fourth sleeve (5312) or are respectively arranged on the On the second sleeve (537) and the third sleeve (5311), the guide grooves (539) are respectively provided on the corresponding to the power shaft (534), and the guide pins (538) can be respectively The groove (539) moves; when the motor (535) drives the power shaft (534) to rotate, the guide groove (539) drives the guide pin (538) along the first support shaft (533) and the second support Axial motion of the shaft (5310).
The rack car power switching system according to claim 6, characterized in that: the lengths of the first sleeve (536) and the fourth sleeve (5312) are equal, and the length of the second sleeve (537) equal to the length of the third sleeve (5311);

The diameters of the first sleeve (536), the second sleeve (537), the third sleeve (5311) and the fourth sleeve (5312) are all equal.
The rack car power switching system according to claim 7, characterized in that: the first support shaft (533) and the second support shaft (5310) have the same length.
The rack car power switching system according to any one of claims 1 to 8, characterized in that: the rack drive gear (2), the axle drive gear (3) and the power gear (4), and the power switching device (5) and the elastic stopper (6) are all arranged in a casing (8).
A method for switching power using the rack car power switching system according to any one of claims 1-9, characterized in that:

i. When the rack car needs to be in the rack gear, start the axial drive mechanism (53) to drive the first ring gear (51) to move axially, so that the first ring gear (51) and the opposite side of the power gear (4) Through the meshing of the splines (9), the power of the power gear (4) is transmitted to the rack drive gear (2) through the first ring gear (51), so that the rack car is in the rack gear state;

ii. When the rack car needs to be in neutral, start the axial drive mechanism (53) to drive the first ring gear (51) and the second ring gear (52) to move axially, so that the splines on the side of the power gear (4) (9) Neither meshes with the splines (9) on the sides of the first ring gear (51) and the second ring gear (52), and the power of the power gear (4) cannot be transmitted, so that the rack car is in a neutral state ;

iii. When the rack car needs to be in the sticking gear, start the axial drive mechanism (53) to drive the second ring gear (52) to move axially, so that the second ring gear (52) and the opposite side of the power gear (4) Through the engagement of the splines (9), the power of the power gear (4) is transmitted to the axle drive gear (3) through the second ring gear (52), so that the rack car is in the sticking gear state.
A rail vehicle, comprising a bogie (8) and a driving device (81) located in the bogie (8); it is characterized in that the driving device (81) is equipped with rack car power switching system;

When the switching device (5) is placed in the rack gear, the power is transmitted to the rack wheel (82) through the driving device (81), the vehicle passes through the rack wheel (82), and the vehicle is obtained by meshing the rack wheel (82) with the rack. traction;

When the switching device (5) is placed in the sticking gear, the power is transmitted to the wheels (83) through the driving device (81), and the vehicle obtains traction through the friction between the wheels (83) and the rail.