CN210793169U

CN210793169U - Automatic swinging curve-retracting bidirectional operation trolley for rail car

Info

Publication number: CN210793169U
Application number: CN201921034391.3U
Authority: CN
Inventors: 赵强; 李丹奇; 孙荣民
Original assignee: CRCC High Tech Equipment Corp Ltd
Current assignee: CRCC High Tech Equipment Corp Ltd
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2020-06-19
Anticipated expiration: 2029-07-04

Abstract

The utility model provides a but rail car is with automatic swing curve receive and releases bidirectional operation dolly and corresponding dolly curve receive and releases method, bidirectional operation dolly includes dolly frame (1), and elevating gear (4) are equipped with to the top of dolly frame (1), and dolly frame (1) upper portion still is equipped with lift guide holder (5), and lift guide holder (5) and railway engineering maintenance vehicle's connected to the frame, its characterized in that: the lower part of the lifting guide support (5) is provided with a transverse beam (7), a trolley transverse swing device is connected between the transverse beam (7) and the trolley frame (1), a traction device is connected between the trolley frame (1) and a frame of the railway engineering maintenance vehicle, and at least one set of locking mechanism (12) is arranged on the trolley frame (1). The utility model discloses can satisfy two-way operation, compact structure occupation space is little, sets up the lift guide bracket, makes the dolly rise and guarantees to rise to the assigned position under the effect of lift guide bracket. The bolt type locking device is adopted, and the structure is simple and reliable.

Description

Automatic swinging curve-retracting bidirectional operation trolley for rail car

Technical Field

The utility model relates to a curve receive and releases the operation dolly, especially a but two-way operation dolly is received and released to railcar with automatic swing curve belongs to engineering equipment technical field.

Background

The maintenance vehicle of railway engineering requires different operation devices according to different maintenance requirements (such as steel rail flaw detection, ballast bed dirt absorption, steel rail grinding, steel rail milling, ballast bed sand removal, ballast bed snow removal, ballast bed coal removal and the like), the operation devices are required to be installed on an independent operation trolley which can be conveniently operated and flexibly moved, and the operation devices and the steel rail are positioned and move along the steel rail through the operation trolley, so that corresponding functional requirements are met. At present, most engineering maintenance machinery operation trolleys are unidirectionally pulled by a front traction rod and a rear traction rod respectively, when the operation trolleys are positioned on a curve section, the outer rail of a steel rail on the curve is ultrahigh, and the frame of a railway vehicle deviates relative to the curve of the steel rail, so that the operation trolleys cannot be folded and unfolded on a curve route and can only be folded and unfolded on a straight route, and the operation efficiency is influenced.

The Chinese patent with application number 201710222717.4 discloses a bidirectional trolley capable of being folded and unfolded in a curve, which is arranged on a railway engineering maintenance vehicle for moving operation and comprises trolley wheels, a wheel shaft, a trolley frame platform, a lifting oil cylinder, a bidirectional Z-shaped telescopic traction mechanism, a centering oil cylinder and a guide device. The lifting oil cylinder and the guiding device are connected with a frame of the railway engineering maintenance vehicle and are generally arranged below the frame. The mounting seat of the bidirectional Z-shaped telescopic traction mechanism is fixed on a frame of the railway engineering maintenance vehicle, so that the bidirectional movement of the traction trolley along with the railway engineering vehicle can be realized, and the change of the length of the traction rod caused by the lifting of the trolley and the deviation of the trolley at the curve section of the railway line can be compensated.

SUMMERY OF THE UTILITY MODEL

The utility model discloses in set for: the direction parallel to the extension of the rails is longitudinal, the direction parallel to the arrangement of the sleepers is transverse, and the direction perpendicular to the plane of the rails or sleepers is vertical.

The utility model provides a but railcar is with automatic swing curve receive and releases bidirectional operation dolly, it is installed on railway engineering maintenance vehicle, this railcar is with automatic swing curve receive and releases bidirectional operation dolly includes the dolly frame, this dolly frame below sets up the dolly wheel, elevating gear is equipped with to the top of dolly frame, the lift guide holder still is equipped with on dolly frame upper portion, the lift guide holder still with railway engineering maintenance vehicle's connected to the frame, the lift guide holder lower part sets up the sideslip roof beam, be connected dolly sideslip pendulous device between sideslip roof beam and the dolly frame, be connected draw gear between the frame of dolly frame and railway engineering maintenance vehicle, so that the operation is accomplished to railcar tractor operation dolly. At least one set of locking mechanism is arranged on the trolley frame and used for lifting the operation trolley in place and locking the operation trolley on the trolley frame after the operation is finished.

Preferably, the front and the rear of the trolley frame are both provided with wheel seats, and the wheel seats are provided with trolley wheels.

Preferably, the upper part of the trolley frame is also provided with a lifting guide groove.

Preferably, a trolley transverse moving and swinging device is connected between the transverse moving beam and the wheel seat.

Preferably, one end of the trolley transverse moving and swinging device is connected to an oil cylinder seat on the transverse moving beam, the other end of the trolley transverse moving and swinging device is connected to an oil cylinder seat on the wheel seat, and the trolley frame can transversely swing relative to a frame of the railway engineering maintenance vehicle through the telescopic trolley transverse moving and swinging device; thereby leading the trolley frame to be folded and unfolded along the track curve.

More preferably, the trolley traversing swinging device is also connected with a controller.

Preferably, the longitudinal front side and the longitudinal rear side of the top end of the trolley frame are respectively provided with a set of locking mechanism for locking the operation trolley on the frame after the operation of the operation trolley is completed and lifted in place.

Preferably, the front end or/and the rear end of the longitudinal direction of the trolley frame is/are provided with a detection device, the detection device is used for detecting the offset distance between the center of the trolley frame and the center of the steel rail track panel, the detection device is electrically connected with the controller and feeds back the detected offset value between the center of the trolley frame and the center of the steel rail track panel to the controller, the controller controls and adjusts the expansion amount of the trolley transverse moving and swinging device in real time until the offset is zero, and at the moment, the trolley frame automatically transversely moves and swings and is placed along a track curve.

Preferably, the lifting guide grooves are respectively positioned in the middle of the front side and the rear side of the trolley frame.

More preferably, every lift guide way includes two boards of bending, a curb plate and four strengthening ribs, and two board welding of bending are on the curb plate, and the axis of the board of bending is vertical, and the axis of curb plate is horizontal, welds two strengthening ribs between the dorsal part of every board of bending and the curb plate.

More preferably, the vertical distance between the lower part of the lifting guide groove and the bottom of the trolley frame is 135 mm-150 mm, the upper part of the lifting guide groove is V-shaped due to the bending structure of the bending plate, and the opening of the lifting guide groove is vertically upward.

Preferably, the angle between each side of the opening and the vertical is 30 to 60 degrees, most preferably 45 degrees.

The trolley frame is in an axisymmetric structure and is axisymmetric along both a transverse center line and a longitudinal center line.

The trolley frame comprises a frame structure formed by connecting two side frames and four rectangular cross beams in front and at back, two rectangular longitudinal beams are symmetrically arranged in the longitudinal middle of the trolley frame, and the two rectangular longitudinal beams in the center of the trolley frame are connected to one end of the traction device through a base; the rectangular beam is also provided with a mounting plate of the wheel seat.

The middle of the longitudinal direction of the trolley frame is provided with a mounting base of a locking mechanism.

The lifting guide support is respectively positioned right above the lifting guide groove, the upper part of the lifting guide support is provided with two rectangular pipes, one end of each rectangular pipe is welded on a frame of the railway ballast bed sewage suction truck, the other end of each rectangular pipe is connected with the locking platform, the lower part of the locking platform is connected with the support, and the support is connected with the guide block through bolts.

The lifting device comprises a spherical hinge joint, a pin shaft and a forked oil cylinder seat, wherein the pin shaft is connected with the trolley frame, and the forked oil cylinder seat is connected with the railway engineering maintenance vehicle frame.

And a hydraulic reversing valve is also connected between the lifting device and the railway engineering maintenance vehicle so as to realize the lifting and reversing functions of the trolley.

The front side and the rear side of the trolley frame are respectively provided with a detection device so as to realize the detection of the offset distance between the operating trolley and the steel rail, the detection value of the detection device is fed back to the controller, and the controller controls the corresponding transverse moving swing device through calculation so as to realize the real-time automatic adjustment of the stretching amount of the transverse moving swing device.

The transverse moving swing device and the detection device are arranged on the trolley, so that the deviation distance between the operating trolley and the steel rail is detected by the detection device when the curve section is formed, the extension or shortening distance of the transverse moving swing device is automatically and accurately controlled, the trolley deflects along the inner rail of the steel rail, and the trolley is tightly attached to the surface of the steel rail under the action of transverse component force of the transverse moving swing device. Therefore, the trolley can automatically swing transversely on the curved steel rail, rapid retraction and release are completed, the operation trolley can be accurately and balancedly lifted to the locking position and locked when the trolley needs to run, the operation trolley can be lowered when the trolley needs to operate, and the operation trolley can be accurately and balancedly lowered and positioned on the steel rail. The structure is simple, and the installation and adjustment are convenient. The operation of the horizontal swing oil cylinder is reduced, and the automatic control of the horizontal swing is realized.

The working mode of the automatic transverse moving curve retractable bidirectional operation trolley for the rail car is as follows: when the operation is completed and the trolley frame needs to be lifted, the air cylinder of the locking device retracts to drive the lock tongue to retract, the lifting oil cylinder lifts the trolley frame to a certain height, the inclined plane of the lifting guide groove enters the guide range of the lifting guide support, the lifting guide groove continues to ascend to the highest lifting position under the guide effect of the inclined plane, the lock tongue extends out under the action of the air cylinder of the locking device and the spring, the trolley frame is placed until the lock tongue is placed on the upper surface of the lifting guide support, and the vehicle taking-up action is completed.

When the rail car is at a curve operation point, the lifting oil cylinder lifts the trolley frame to the highest position, the lock tongue is retracted under the action of the air cylinder of the locking device, the lifting oil cylinder lowers the trolley frame, the detection devices arranged at the front and the rear of the trolley frame detect the offset distance between the center of the trolley frame and the center of the rail row of the steel rail in the lowering process, then the offset value is fed back to the controller, the controller controls and adjusts the expansion amount of the trolley transverse moving swinging device in real time until the offset between the center of the trolley frame and the center of the rail row is zero, and the trolley frame automatically transversely moves and swings to lower along the curve of the rail so that the trolley accurately falls on the steel.

Further operations are known to those of ordinary skill in the art and will not be described in detail.

The utility model provides a pair of can automatic swing curve receive and release bidirectional operation dolly adopts single traction lever traction operation, can satisfy bidirectional operation, and compact structure occupation space is little, adopts the skew of detection device detection operation dolly, and control system automatic control dolly sideslip pendulous device accomplishes the curve and receives and releases the operation dolly, reduces personnel's operation and realizes automatic control. The lifting guide support is arranged, so that the trolley can rise to a specified position under the action of the lifting guide support. The bolt type locking device is adopted, and the structure is simple and reliable.

The key innovation points of the technical scheme are as follows:

1. the technical scheme relates to an automatic swinging curve winding and unwinding bidirectional operation trolley for a rail car, which can realize automatic transverse moving and swinging to complete a curve winding and unwinding function through a detection device and a control system, reduce personnel operation and realize automatic control.

2. According to the technical scheme, the operation trolley adopts a single-traction-rod operation mode, bidirectional operation can be realized, the structure is simple and reliable, and the occupied space of the whole operation trolley is small.

3. According to the technical scheme, the operation trolley adopts a bolt type locking mechanism, and the lifting guide support ensures that the trolley rises to a specified position. The bolt type locking device is adopted, and the structure is simple and reliable.

Drawings

Fig. 1 is a schematic structural view of a preferred embodiment of an automatic swinging curve retractable bidirectional operation trolley for a rail car according to the present invention;

FIG. 2 is a side view of the automatically swinging curve retractable bi-directional working trolley for the railcar shown in FIG. 1;

FIG. 3 is a schematic perspective view of the cart frame in the embodiment of FIG. 1;

FIG. 4 is a schematic view of the construction of the lift guide bracket of the embodiment of FIG. 1;

FIG. 5 is a schematic structural view of the locking mechanism of the embodiment of FIG. 3;

FIG. 6 is a schematic view of the draft gear in the embodiment of FIG. 1;

FIG. 7 is a schematic structural view of the lift cylinder and the cylinder base in the embodiment shown in FIG. 1;

the meanings of the numerical designations in fig. 1-7 are:

lifting guide support of 1 trolley frame, 2 wheel seats, 3 trolley wheels, 4 lifting oil cylinders and 5

6 lifting guide groove 7 traversing beam 8 trolley traversing swing oil cylinder 9 traction device 10 oil cylinder seat

11 detection device 12 locking mechanism 13 reinforcing rib 14 side plate 15 side frame

16 rectangular cross beam 17 mounting plate 18 mounting base 19 rectangular longitudinal beam 20 rectangular tube

21 locking platform 22 detection induction device 23 support 24 guide block 25 lock tongue

26 bolt bar 27 spring 28 cylinder 29 cylinder base 30 support

31 pin 32 front mounting seat 33 pin 34 thin nut 35 stop piece

36 thread seat 37 seamless steel pipe 38 rear mounting seat 39 rod end joint bearing 40 oil cylinder mounting seat

41 lifting pin shaft 42 rib plate 43 oil cylinder fixing nut 44 pin shaft 45 oil cylinder sleeve

46 piston rod 612 bending plate 439 lifts the base.

Detailed Description

For a better understanding of the present invention, reference will now be made to the embodiments illustrated in the drawings.

As shown in fig. 1, which is a schematic structural view of a preferred embodiment of the automatic swinging curve retractable bidirectional operation trolley for the rail car according to the present invention, the automatic swinging curve retractable bidirectional operation trolley for the rail car shown in figure 1 is arranged on a railway engineering maintenance vehicle, the automatic swinging curve-retracting bidirectional operation trolley for the rail car comprises a trolley frame 1, wherein the front and the back of the trolley frame 1 are provided with four wheel seats 2, four trolley wheels 3 are arranged on the four wheel seats 2, four lifting oil cylinders 4 are arranged above four corners of the front/rear side of the trolley frame 1, two lifting guide supports 5 are arranged on the upper portion of the front/rear side of the trolley frame 1, the lifting guide supports 5 are connected with a frame of a railway engineering maintenance vehicle, two lifting guide grooves 6 are arranged on the upper portion of the front/rear side of the trolley frame 1, and the lifting guide grooves 6 are connected with the trolley frame 1. The lower part of the lifting guide bracket 5 is provided with a traverse beam 7, a trolley traverse swing oil cylinder 8 is connected between the traverse beam 7 and the wheel seat 2, as shown in fig. 2, one end of the trolley traverse swing oil cylinder 8 is connected to an oil cylinder seat 10 on the traverse beam 7, the other end of the trolley traverse swing oil cylinder 8 is connected to an oil cylinder seat 10 on the wheel seat 2, the top of the trolley frame 1 is connected with one end of a traction device 9, and the other end of the traction device 9 is connected to a rail car, so that the rail car can pull the operation trolley to complete the operation. The longitudinal front side and the longitudinal rear side of the top end of the trolley frame 1 are respectively provided with a set of locking mechanism 12 for locking the operation trolley on the trolley frame after the operation of the operation trolley is completed and the operation trolley is lifted in place.

As shown in fig. 2, the lower portions of the traverse beams 7 at the front and rear longitudinal ends of the carriage frame 1 are provided with a total of two cylinder blocks 10 so as to connect two carriage traverse cylinders 8 between the wheel blocks 2 and the traverse beams 7. One of the cylinder bases 10 is connected with the traverse beam 7, and the other cylinder base 10 is connected with the wheel base 2. The trolley frame 1 can swing transversely relative to the trolley frame through the telescopic trolley transverse swing oil cylinder 8; the trolley frame 1 can be retracted and extended along a track curve, and the trolley transverse moving swing oil cylinder 8 is also connected with a controller.

Two detection devices 11 are arranged at the front end and the rear end of the trolley frame 1 in the longitudinal direction, the distance between the center of the trolley frame 1 and the center of the steel rail track panel is detected through the detection devices 11, the detection devices 11 are electrically connected with the controller, the detected offset value between the center of the trolley frame 1 and the center of the steel rail track panel is fed back to the controller, the controller controls and adjusts the stretching amount of the trolley transverse moving swing oil cylinder 8 in real time until the offset is 0, and the trolley frame 1 is enabled to automatically transversely move and swing to be placed along a track curve.

As shown in fig. 3, the lifting guide grooves 6 are respectively located in the middle of the front and rear sides of the cart frame 1. Each lifting guide groove 6 comprises two bending plates 612, a side plate 14 and four reinforcing ribs 13, the two bending plates 612 are welded on the side plate 14, the axis of each bending plate is longitudinal, the axis of each side plate 14 is transverse, and the two reinforcing ribs 13 are welded between the back side of each bending plate 612 and the side plate 14; the vertical direction interval of the lower part of the lifting guide groove 6 from the bottom of the trolley frame 1 is 135mm, the upper part of the lifting guide groove 6 is V-shaped due to the bending structure of the bending plate 612, and the opening of the lifting guide groove 6 is vertically upward. The angle between each side of the opening and the vertical is 45 degrees. The trolley frame 1 is of an axisymmetric structure and is axisymmetric along both a transverse center line and a longitudinal center line. The trolley frame 1 comprises a frame structure formed by connecting two side frames 15 and four rectangular cross beams 16 at the front and the rear, two rectangular longitudinal beams 19 are symmetrically arranged in the longitudinal middle of the trolley frame 1, and the two rectangular longitudinal beams 19 at the center of the trolley frame 1 are connected to one end of the traction device 9 through a base; the rectangular cross beam 16 is also provided with a mounting plate 17 of the wheel seat 2. A mounting base 18 for the locking mechanism 12 is provided longitudinally intermediate the cart frame.

As shown in fig. 4, the lifting guide brackets 5 are respectively positioned right above the lifting guide grooves 6, the upper parts of the lifting guide brackets 5 are two rectangular pipes 20, one ends of the rectangular pipes 20 are welded on the frame of the railway track bed sewage suction truck, the other ends of the rectangular pipes 20 are connected with the locking platform 21, the lower part of the locking platform 21 is connected with a bracket 23, and the bracket 23 is connected with the guide blocks 24 through bolts.

As shown in fig. 5, a set of locking mechanisms 12 is respectively installed on the front side and the rear side of the top surface of the trolley frame 1, the locking mechanisms 12 are of an axisymmetric structure, the locking mechanism 12 comprises a locking tongue 25, one end of the locking tongue 25 is welded with a locking tongue rod 26, the other end of the locking tongue 25 penetrates through the side plates 14, a support 30 is arranged on the installation base 18 connected between the two side plates 14, the locking tongue rod 26 penetrates through the support 30, the support 30 is connected with the installation base 18 through a bolt, a spring 27 is arranged between the support 30 and the locking tongue 25, and the spring 27 is used for keeping the locking tongue 25 in a locking position and not sliding out. One end of cylinder 28 is connected with bolt bar 26 through pin 31, the other end of cylinder 28 is connected with cylinder base 29 through pin, and cylinder base 29 is connected with mounting base 18 through bolt. As shown in fig. 4, a sensing device 22 is provided on the locking platform 21 for sensing the protrusion of the latch 25 to the locking position shown in fig. 5. The detection sensor 22 is electrically connected to the controller.

As shown in fig. 6, two ends of a seamless steel tube 37 in the traction device 9 are welded with a threaded seat 36, one threaded seat is connected with a rear mounting seat 38, the other threaded seat 36 is connected with a rod end joint bearing 39 through threads, the rod end joint bearing 39 is provided with a thin nut 34 and a stop piece 35, the length of the traction device 9 is adjusted through the thin nut 34, the front mounting seat 32 is connected with a railway vehicle frame through a welding mode, the other end of the front mounting seat is connected with the rod end joint bearing through a pin shaft 33, and the rear mounting seat 38 is welded at the top end of the trolley frame.

As shown in fig. 7, the upper end of the lift cylinder 4 is connected to the lifting base 439 of the railway maintenance vehicle through a cylinder mounting base 40, the cylinder mounting base 40 is connected to a cylinder sleeve 45 of the lift cylinder 4 through a pin 44, the lower end of a piston rod 46 of the lift cylinder 4 is connected to a lift pin 41 through a cylinder fixing nut 43, the lift pin 41 is welded to the trolley frame 1, and a rib plate 42 is welded below the lift pin 41.

The working mode of the automatic transverse-moving curve retractable bidirectional operation trolley for the rail car in the embodiment is as follows: when the operation is completed and the trolley frame 1 needs to be lifted, the air cylinder 28 of the locking device retracts and simultaneously drives the bolt 25 to retract, the lifting oil cylinder 4 lifts the trolley frame 1 to a certain height, the inclined plane of the lifting guide groove 6 enters the guide range of the lifting guide support 5 and continues to rise to the highest lifting position under the guide effect of the inclined plane, at the moment, under the action of the air cylinder 28 of the locking device and the spring 27, the bolt 25 extends out, the trolley frame 1 is placed until the bolt 25 is placed on the upper surface of the lifting guide support 5, and the vehicle collecting action is completed.

When the rail car is at a curve operation point, the lifting oil cylinder 4 lifts the trolley frame 1 to the highest position, the lock tongue 25 is retracted under the action of the air cylinder 28 of the locking device, the lifting oil cylinder 4 lowers the trolley frame 1, the detection devices 11 in front of and behind the trolley frame 1 detect the offset distance between the center of the trolley frame 1 and the center of the steel rail track panel in the lowering process, then the offset value is fed back to the controller, the controller controls and adjusts the expansion amount of the trolley transverse moving swing oil cylinder 8 in real time until the offset between the center of the trolley frame 1 and the center of the steel rail panel is zero, and the trolley frame automatically transversely moves and swings to lower along the curve of the rail so that the trolley accurately falls on the steel rail.

The utility model provides a pair of can automatic swing curve receive and release bidirectional operation dolly adopts single traction lever traction operation, can satisfy bidirectional operation, and compact structure occupation space is little, adopts the skew of detection device detection operation dolly, and control system automatic control dolly sideslip hydro-cylinder accomplishes the curve and receives and releases the operation dolly, reduces personnel's operation and realizes automatic control. The lifting guide support is arranged, so that the trolley can rise to a specified position under the action of the lifting guide support. The bolt type locking device is adopted, and the structure is simple and reliable.

Claims

1. The utility model provides a but railcar is with two-way operation dolly is receive and release with automatic swing curve, includes dolly frame (1), sets up dolly wheel (3) below dolly frame (1), and elevating gear (4) are equipped with to the top of dolly frame (1), and dolly frame (1) upper portion still is equipped with lift guide holder (5), lift guide holder (5) and railway engineering maintenance vehicle's connected to the frame, its characterized in that: the lower part of the lifting guide support (5) is provided with a transverse beam (7), a trolley transverse swing device is connected between the transverse beam (7) and the trolley frame (1), a traction device is connected between the trolley frame (1) and a frame of the railway engineering maintenance vehicle, and at least one set of locking mechanism (12) is arranged on the trolley frame (1).

2. The automatically swingable curvilinear retraction bidirectional working trolley for railcars according to claim 1, wherein: the upper part of the trolley frame (1) is also provided with a lifting guide groove (6).

3. The automatically swingable curvilinear retraction bidirectional working trolley for railcars according to claim 1, wherein: one end of the trolley transverse moving and swinging device is connected to an oil cylinder seat (10) on the transverse moving beam (7), the other end of the trolley transverse moving and swinging device is connected to an oil cylinder seat (10) on the wheel seat (2), and the trolley frame (1) is enabled to swing transversely relative to a frame of the railway engineering maintenance vehicle through the telescopic trolley transverse moving and swinging device.

4. The automatically-swinging curve-retractable bidirectional operation trolley for the rail car as claimed in claim 3, wherein: the trolley transverse moving and swinging device is also connected with a controller.

5. The automatic swinging curve-retractable bidirectional operation trolley for the rail car as claimed in any one of claims 1 to 4, wherein: the longitudinal front side and the longitudinal back side of the top end of the trolley frame (1) are respectively provided with a set of locking mechanism (12).

6. The automatically-swinging curve-retractable bidirectional operation trolley for the rail car as claimed in claim 5, wherein: the detection device (11) is arranged at the front end or/and the rear end of the longitudinal direction of the trolley frame (1), the detection device (11) is used for detecting the offset distance between the center of the trolley frame (1) and the center of the steel rail track panel, the detection device (11) is electrically connected with the controller, the detected offset value between the center of the trolley frame (1) and the center of the steel rail track panel is fed back to the controller, the controller controls and adjusts the expansion amount of the trolley transverse moving and swinging device in real time until the offset value is zero, and at the moment, the trolley frame (1) automatically transversely moves and swings and is placed along a track curve.

7. The automatically-swinging curve-retractable bidirectional operation trolley for the rail car as claimed in claim 2, wherein: the lifting guide grooves (6) are respectively positioned in the middle of the front side and the rear side of the trolley frame (1).

8. The automatically swingable curvilinear retraction bidirectional working trolley for railcars according to claim 7, wherein: every lift guide way (6) include two boards (612) of bending, a curb plate (14) and four strengthening ribs (13), and two boards (612) of bending weld on curb plate (14), and the axis of the board (612) of bending is vertical, and the axis of curb plate (14) is horizontal, welds two strengthening ribs (13) between the dorsal part of every board (612) of bending and curb plate (14).

9. The automatic swinging curve retracting bidirectional operation trolley for the rail car as claimed in claim 7 or 8, wherein: the vertical direction distance between the lower part of the lifting guide groove (6) and the bottom of the trolley frame (1) is 135 mm-150 mm, the upper part of the lifting guide groove (6) is V-shaped due to the bending structure of the bending plate (612), and the opening of the lifting guide groove (6) is vertically upward.

10. The automatically swingable curvilinear retraction bidirectional working trolley for a railcar according to claim 9, wherein: the included angle between each side of the opening and the vertical direction is 30-60 degrees.

11. The railcar according to any one of claims 1 to 4 or 6 to 8, wherein the railcar is provided with an automatic swinging curve retractable bidirectional operation car, characterized in that: the trolley frame (1) is in an axisymmetric structure and is axisymmetric along both a transverse center line and a longitudinal center line.

12. The automatically swingable curvilinear retraction bidirectional working trolley for a railcar according to claim 11, wherein: the trolley frame (1) comprises a frame structure formed by connecting two side frames (15) and four rectangular cross beams (16) at the front and the rear, two rectangular longitudinal beams (19) are symmetrically arranged in the longitudinal middle of the trolley frame (1), and the two rectangular longitudinal beams (19) at the center of the trolley frame (1) are connected to one end of the traction device (9) through a base; the rectangular beam (16) is also provided with a mounting plate (17) of the wheel seat (2).

13. The automatically swingable curvilinear retraction bidirectional working trolley for a railcar according to claim 12, wherein: the longitudinal middle of the trolley frame is provided with a mounting base (18) of a locking mechanism (12).

14. The railcar according to any one of claims 1 to 4, or any one of claims 6 to 8, or 12 or 13, wherein the railcar is provided with an automatic swinging curve retracting bidirectional operation trolley, wherein the automatic swinging curve retracting bidirectional operation trolley comprises: the lifting guide support (5) is respectively positioned right above the lifting guide groove (6), the upper part of the lifting guide support (5) is provided with two rectangular pipes (20), one end of each rectangular pipe (20) is welded on the frame of a railway ballast bed sewage suction truck, the other end of each rectangular pipe (20) is connected with a locking platform (21), the lower part of each locking platform (21) is connected with a support (23), and the supports (23) are connected with guide blocks (24) through bolts.

15. The automatically swingable curvilinear retraction bidirectional working trolley for a railcar according to claim 14, wherein: the lifting device comprises a spherical hinge joint, a pin shaft and a forked oil cylinder seat, wherein the pin shaft is connected with the trolley frame, and the forked oil cylinder seat is connected with the railway engineering maintenance vehicle frame.

16. The automatically swingable curvilinear retraction bidirectional working trolley for a railcar according to claim 14, wherein: and a hydraulic reversing valve is also connected between the lifting device and the railway engineering maintenance vehicle so as to realize the lifting and reversing functions of the trolley.