CN111845466A - Mobile contact net system - Google Patents

Abstract

The disclosure relates to a mobile contact net system, which is used for providing electric power support for rail transit and comprises a movable contact line assembly, a first portal, a second portal, two power devices, a plurality of stand columns and a telescopic mechanism, wherein the first portal is connected with the second portal; the first portal and the second portal are both provided with a vertical frame and a transverse frame, the transverse frame crosses the track, and the second portal and the first portal are arranged at intervals; the two power devices are respectively arranged on the crossbars of the first portal and the second portal and are respectively connected with two ends of the movable contact line assembly; the plurality of upright posts are arranged between the first portal frame and the second portal frame; the telescopic mechanism is arranged on the upright post and comprises a rocker arm, a sliding block and a connecting rod, the rocker arm is hinged to the upright post, the sliding block is arranged on the upright post and can slide along the length direction of the upright post, the connecting rod is connected with the sliding block and the rocker arm in a hinged mode, and the tail end of the connecting rod is connected with the contact wire assembly; the walking device can drive the contact wire assembly to move so that the contact wire assembly can get close to or get away from the upright post in the horizontal direction.

Description

Mobile contact net system

Technical Field

The utility model relates to a rail transit removes contact net technical field, especially relates to a remove contact net system.

Background

In rail transit, the power of the electric locomotive is derived from a contact line above a rail or a third rail on one side of the rail. A freight train using a contact line as a power source needs to load and unload goods in a freight yard, and generally needs to load and unload goods from above the train. Some solutions are to use diesel locomotives to pull trains, others are to arrange mobile catenary systems in freight yards. The movable contact net is a section of catenary and a contact line which can move integrally, can provide power when a train enters and leaves a station, and can be moved away from the upper part of the train after the train stops to give way for loading and unloading operation. The movable contact net is realized by arranging an upright post along a track, arranging a movable support rod on the upright post, wherein the support rod can rotate in the horizontal direction or the vertical direction, and a contact line and a carrier cable are connected at the tail end of the support rod. When the supporting rod rotates, the contact line and the carrier cable at the tail end of the supporting rod are moved away from the position right above the train, and space is made for loading operation.

The solution needs to arrange an electric driving device on each upright column, which is high in cost, complex in control system for realizing synchronous driving of each driving device, and low in overall electric reliability. In addition, in order to ensure the synchronous movement of the contact line, a rigid contact line is generally adopted, and the method is not suitable for a large-length freight station.

Disclosure of Invention

To solve the above technical problem or to at least partially solve the above technical problem, the present disclosure provides a mobile contact network system.

In a first aspect, the mobile contact net system is used for providing electric support for rail transit, and comprises a movable contact line assembly, a first gantry, a second gantry, two power devices, a plurality of stand columns and a telescopic mechanism; the first portal and the second portal are both provided with a vertical frame and a transverse frame, the transverse frame crosses the track, and the second portal and the first portal are arranged at intervals; the two power devices are respectively arranged on the crossbearers of the first portal and the second portal and are respectively connected with two ends of the movable contact line assembly, each power device comprises a driving device and a traveling device, each traveling device is connected with the tail end of the movable contact line assembly, each driving device comprises a first driving mechanism and a second driving mechanism, each first driving mechanism is used for driving the traveling device to move on the crossbearers along a first direction, each second driving mechanism is used for driving the traveling device to move on the crossbearers along a second direction, the first direction is opposite to the second direction, and the traveling devices can drive the contact line assemblies to move when traveling; the plurality of upright posts are arranged between the first portal frame and the second portal frame; the telescopic mechanism is arranged on the upright post and comprises a rocker arm, a sliding block and a connecting rod, the rocker arm is hinged to the upright post, the sliding block is arranged on the upright post and can slide along the length direction of the upright post, the connecting rod is connected with the sliding block and the rocker arm in a hinged mode, and the tail end of the connecting rod is connected with the contact wire assembly; the first gantry, the second gantry and the upright post are erected along the rail, the traveling device can drive the contact wire assembly to move, so that the contact wire assembly can be close to or far away from the upright post in the horizontal direction, and the telescopic mechanism stretches and retracts along with the movement of the contact wire assembly and supports the contact wire assembly.

In a first possible implementation, the connecting rods comprise a first connecting rod and a second connecting rod of equal length, both hinged to the sliding block and jointly connected to and supporting the contact wire assembly as part of a parallelogram linkage.

In combination with the above possible implementation manners, in a second possible implementation manner, the length of the rod body between the hinge point on the connecting rod, which is connected with the rocker arm, and the free end of the connecting rod is equal to the length of the rocker arm.

In combination with the above possible implementation manners, in a third possible implementation manner, a hinge point on the connecting rod, which is connected with the rocker arm, is a midpoint of the connecting rod.

In combination with the above possible implementation manners, in a fourth possible implementation manner, a wheel set is arranged on the sliding block, and the wheel set is used for reducing the friction force between the sliding block and the upright column when the sliding block moves along the upright column.

In a fifth possible implementation manner, in combination with the above possible implementation manners, the wheel set is located on a side of the slider facing the track.

With reference to the foregoing possible implementation manners, in a sixth possible implementation manner, a gravity balance device is disposed on the column, and the gravity balance device is connected to the slider and applies an upward balancing force to the slider.

With reference to the foregoing possible implementation manners, in a seventh possible implementation manner, the gravity balancing device is a spring, and a balancing force provided by the spring is smaller than the gravity of the telescopic mechanism.

With reference to the foregoing possible implementation manner, in an eighth possible implementation manner, the spring is a compression spring, and the compression spring is located below the slider and supports the slider.

Combine above-mentioned possible implementation, in ninth possible implementation, gravity balancing unit includes pulley, lifting rope and counter weight, and the pulley sets up in the stand and is located the slider top, and the slider is connected to lifting rope one end, and the pulley connection counter weight is walked around to the other end, and the gravity of counter weight converts into the ascending pulling force to the slider.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages: the telescopic mechanism supports and guides the contact line, the two power devices tension and drive the contact line from two ends of the contact line, the whole contact line is synchronously driven to move, and the telescopic mechanism is simple and reliable in structure and simple to control.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a mobile contact network system provided in accordance with an embodiment of the present disclosure;

fig. 2 is a top view of the mobile catenary of fig. 1;

figure 3 is a schematic view of the contact wire assembly of the moving catenary of figure 2 shown retracted;

FIG. 4 is a schematic structural view of the telescoping mechanism of FIG. 1;

FIG. 5 is an enlarged view of the second mast of FIG. 2;

FIG. 6 is a side view of the second mast of FIG. 5;

FIG. 7 is a schematic view of the structure of a gravity balancing apparatus according to one embodiment;

reference numerals:

100-a first portal frame, 110-a first vertical frame, 120-a second vertical frame, 130-a transverse frame, 141-a first driving mechanism, 142-a second driving mechanism and 150-a walking device;

200-a second portal, 210-a first stand, 220-a second stand, 230-a crossbar;

241-a first drive mechanism, 241 d-a movable pulley, 241 a-an actuating member, 241 b-a spool, 241 c-a cable, 242-a second drive mechanism, 242 a-a first guide pulley, 242 b-a counterweight body, 242 c-a cable, 242 d-a cable;

250-running gear, 251-main body, 252-running wheel, 253 a-second guide wheel, 253 b-third guide wheel;

400-contact wire assembly, 410-carrier cable, 420-mobile contact wire;

800-column, 810-telescoping mechanism, 811-rocker, 812-slider, 813-link, 813 a-cantilever segment, 814-connecting mechanism; 816-pulleys, 817-roping, 818-counterweights, 819-wheel sets;

m-electric locomotive, n-pantograph, a-track, b-fixed contact line, d-fixed contact line.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

The movable contact net system provided by the disclosure can change the relative position between the contact line and the upright column, so that the contact line is moved away from the upper part of the track, and the carrying operation is avoided. The crossbearers of the first portal frame and the second portal frame are both provided with a traveling device, the upright posts are provided with telescopic mechanisms, and the contact wires are connected in series on the traveling devices and the telescopic mechanisms. When the traveling device moves along the cross frame, the traveling device drives the contact line and the telescopic mechanism to follow up, so that the contact line is moved away from the upper part of the track to give way for loading operation; or to move the contact wire above the track to provide the electric locomotive with preparatory electric power. The telescopic mechanisms provide support and limit for the contact wires, and the telescopic mechanisms on the stand columns are mutually independent and can move synchronously. The technical scheme of the disclosure is further explained by combining the drawings in the specification.

Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a mobile catenary system according to an embodiment of the disclosure, fig. 2 is a top view of the mobile catenary system in fig. 1, fig. 3 is a schematic structural diagram of a contact wire assembly 400 of the mobile catenary system in fig. 2 when retracted, and fig. 4 is a schematic structural diagram of a telescoping mechanism 810 in fig. 1.

The mobile contact net system is one part of a contact net system, the length of the mobile contact net system is equivalent to that of a freight station yard, and the fixed contact net systems are arranged at two ends of the mobile contact net system. The mobile overhead line system comprises a first gantry 100, a second gantry 200, a plurality of columns 800, a contact line assembly 400, a driving device, a traveling device, a telescoping mechanism 810 and a connecting mechanism 814. The first door frame 100, the second door frame 200 and the vertical columns 800 are arranged at the side of the track at a predetermined interval, and the top ends thereof are used for mounting the driving device, the traveling device, the telescopic mechanism 810 and the connecting mechanism 814. The first gantry 100 and the second gantry 200 are provided with a driving device and a traveling device on the cross beam crossing the track. The column 800 is provided with a telescopic mechanism 810 and a connecting mechanism 814, the telescopic mechanism 810 can be extended and contracted along the radial direction of the column 800, and the connecting mechanism 814 is fixed at the tail end of the telescopic mechanism 810. The contact wire assembly 400 is coupled at both ends to the traveling mechanisms of the first gantry 100 and the second gantry 200, and at the middle portion to the coupling mechanism 814 of the column 800.

The first mast 100 is disposed on the entry side of the yard. The first mast 100 includes a first stand 110, a second stand 120, and a cross-frame 130. The first stand 110 and the second stand 120 are symmetrically arranged on two sides of the rail, the cross frame 130 crosses the rail a, and two ends of the cross frame 130 are respectively fixed on the top ends of the first stand 110 and the second stand 120. The cross frame 130 is provided with a traveling device 150, and the driving device is used for driving the traveling device 150 to reciprocate on the cross frame 130. The running gear 150 is used to attach one end of the contact wire assembly 400.

The second portal 200 is disposed at the departure side of the yard with a certain distance from the first portal 100. The second portal 200 includes a first stand 210, a second stand 220, and a cross frame 230. The first standing frame 210 and the second standing frame 220 are symmetrically arranged on both sides of the rail, and the cross frame 230 crosses the rail a, and both ends thereof are fixed to the top ends of the first standing frame 210 and the second standing frame 220, respectively. The transverse frame 230 is provided with a walking device 250, and the driving device is used for driving the walking device 250 to reciprocate on the transverse frame 230. Running gear 250 is used to connect the other end of contact wire assembly 400.

A plurality of uprights 800 are disposed between the first mast 100 and the second mast 200.

The driving device disposed on the first gantry 100 includes a first driving mechanism 141 and a second driving mechanism 142, the first driving mechanism 141 is used for driving the traveling device 150 to move towards the first stand 110, and the second driving mechanism 142 is used for driving the traveling device 150 to move towards the second stand 120.

The telescoping mechanism 810 is fixed to the upper portion of the column 800. One end of the telescopic mechanism 810 is fixed with the upright column 800, and the telescopic mechanism 810 can move to enable the free end (the other end) to be far away from and close to the upright column 800. The telescopic direction of the telescopic mechanism 810 is radial to the column 800 and perpendicular to the track a.

A coupling mechanism 814 is provided at the free end of the telescoping mechanism 810. The attachment mechanism 814 is used to attach the contact wire assembly 400.

The contact wire assembly 400 comprises a messenger wire 410 and a movable contact wire 420 which are arranged side by side in the vertical direction, wherein two ends of the messenger wire 410 and the movable contact wire 420 are respectively fixed on the traveling device 150 and the traveling device 250, and the middle part of the messenger wire 410 and the movable contact wire 420 is fixed on a connecting mechanism 814 of the upright column 800, which is equivalent to the fact that the traveling device 150, the traveling device 250 and the connecting mechanism 814 are connected in series. When the traveling unit 150 and the traveling unit 250 move synchronously, the tension of the contact wire assembly 400 is used to drive the telescoping mechanism 810 and the connecting mechanism 814 to follow, thereby moving between the right upper side and the lateral upper side of the track a. The telescoping mechanism 810 has a supporting function on the contact line assembly 400, and the telescoping mechanism 810 has a telescoping stroke limitation, so that the contact line assembly 400 can be limited and positioned.

Referring to fig. 2, the telescoping mechanism 810 is extended such that the contact wire assembly 400 is positioned directly above the track a, and the moving contact wire 420 is in communication with the fixed contact wire b and the fixed contact wire d, and is in contact with the pantograph n of the electric locomotive m. The electric locomotive m can now take power from the moving contact wire 420 to normally enter or pass through the segment. Referring to fig. 3 and 4, the retracting mechanism 810 is in a retracted state, and the contact wire assembly 400 is then positioned over the side of the track a, thereby providing working space for the top of the electric locomotive m to facilitate loading with a loading implement.

The telescoping mechanism 810 comprises a linkage assembly having a portion thereof connected to the post and another portion thereof forming a free end and connected to the contact wire assembly. Specifically, the telescopic mechanism 810 includes a swing arm 811, a slider 812, and a link 813, the swing arm 811 is hinged to the column 800, and the slider 812 can slide on the column 800 along the longitudinal direction of the column 800. One end of the connecting rod 813 is hinged to the sliding block 812, and the other end is used for connecting with the connecting mechanism 814 to support the contact wire assembly 400 fixed on the connecting mechanism 814. The middle part of the connecting rod 813 is hinged with the free end of the rocker arm 811.

In this embodiment, the connecting rod 813 includes a first connecting rod and a second connecting rod with equal length, one end of each of the first connecting rod and the second connecting rod is hinged to the sliding block 812, and the other end of each of the first connecting rod and the second connecting rod is hinged to the connecting mechanism 814. The first link, the second link, the slider 812 and the link 814 together form a parallelogram linkage. Wherein the cantilever section 813a of the first link (the link located at the upper side in fig. 4) is equal to the length of the rocker arm 811, i.e. the length of the rod body between the hinge point of the link 813 with the rocker arm 811 and the free end of the link 813 is equal to the length of the rocker arm 811. Moreover, the hinge point of the connecting rod 813 connected with the rocker arm 811 is the midpoint of the first connecting rod, and the free end of the telescopic mechanism 810 can drive the connecting mechanism 814 to move horizontally when the slider 812 moves up and down.

In some alternative embodiments, the hinge point on link 813 to rocker 811 may also be other than the midpoint of the first link; in other alternative embodiments, cantilever section 813a may be unequal in length to rocker arm 811. In other alternative embodiments, the link 813 can also be a single link.

Movement of the telescopic mechanism 810 on the plurality of columns 800 is effected by means of the messenger 410. The two ends of the carrier cable 410 are connected to the traveling devices on the two gantries, and the middle of the carrier cable is connected with each telescopic mechanism 810 in series. When the walking device moves on the cross frame of the gantry, the tensioned catenary 410 can drive the telescopic mechanisms 810 of the upright columns 800 to move.

The vertical column 800 and the contact line assembly 400 are connected, supported and positioned through the telescopic mechanism 810 and the connecting mechanism 814, so that the contact line assembly 400 can be stably and reliably far away from and close to the vertical column 800 under the support and guidance of the telescopic mechanism 810, and the function of abdicating above the track a is realized. Moreover, the telescoping mechanism 810 is a link mechanism, when the relative position between the members changes, the rods can be close to and attached to each other, and the rods move to the position substantially parallel to the upright column 800 by rotating, so that the rods are not occupied by extra space to be stored. In addition, since the contact wire assembly 400 can move in the direction perpendicular to the rail a, and finally, no displacement occurs in the length direction, the connection and separation of the contact wire assembly 400 with the fixed contact net b and the fixed contact wire d is more convenient.

Fig. 5 is an enlarged view of the second gantry of fig. 2, and fig. 6 is a side view of the second gantry of fig. 5.

The cross frame 130 of the first gantry 100 is provided with a traveling device 150, the cross frame 230 of the second gantry 200 is provided with a traveling device 250, two ends of the contact wire assembly 400 are respectively connected to the traveling device 150 and the traveling device 250, and when the traveling device 150 and the traveling device 250 synchronously move in the same direction, the contact wire assembly 400 can be driven to be away from or close to the upright column 800 integrally. The first driving mechanism 141 of the first gantry 100 is used for driving the traveling device 150 to reciprocate on the cross frame 130, and the first driving mechanism 241 is used for driving the traveling device 250 to reciprocate on the cross frame 230.

The traveling device 250 includes a main body 251 and a plurality of traveling wheels 252. The main body 251 is a base body for mounting other parts, and the traveling wheels 252 are used for supporting the main body 251 to travel on the cross frame 230. The axis of the travel wheels 252 is perpendicular to the upper surface of the cross frame 230 so that the travel mechanism 250 can carry loads from tension in the contact wire assembly 400. The traveling device 250 is further provided with a second guide wheel 253a, a third guide wheel 253b and a movable pulley 241d, wherein the second guide wheel 253a and the third guide wheel 253b are used for being connected with the second driving mechanism 242, and the movable pulley 241d is used for being connected with the first driving mechanism 241. The main body 251 is a multilayer structure formed by rectangular plates, and the number of the road wheels 252 is 8, and the road wheels are distributed on four corners of two layers of the rectangular plates. The traveling wheel 252 has an annular groove formed on an outer circumferential surface thereof, and is capable of being fitted to the cross frame 230, preventing the body 251 from being displaced in a vertical direction, and ensuring that the body 251 reciprocates only along a longitudinal direction of the cross frame 230.

The first drive mechanism 241 includes an actuator 241a, a spool 241b, and a cable 241 c. The actuator 241a is an electric motor, the spool 241b is coaxially provided on the output shaft of the actuator 241a, one end of the cable 241c is wound around the spool 241b, the other end is fixed to the cross frame 230 after passing over the movable pulley 241d on the main body 251, and the cable 241c and the movable pulley 241d form a movable pulley structure. When the actuator 241a drives the spool 241b to rotate, the cable 241c is wound on the surface of the spool 241b, and the traveling device 250 is pulled to approach the first stand 210.

The second driving mechanism 242 includes two first guide wheels 242a, a weight body 242b, a cable 242c, and a cable 242 d. The weight body 242b is used to provide the gravitational force applied thereto as a driving force, the cable 242c and the cable 242d are two segments of a cable, and are used to transmit the driving force to the traveling device 250, and the first guide wheel 242a is used to convert the vertical force into the horizontal force. Specifically, two first guide wheels 242a are disposed on the top of the second stand 220, and the axes thereof are horizontal and parallel and along the extending direction of the rail a. The top end of the counterweight body 242b is provided with a pulley, and the pull cable 242c and the pull cable 242d form a movable pulley block structure with the pulley, and the counterweight body 242b is hung on the second vertical frame 220 through two first guide pulleys 242 a. The ends of the pulling cables 242c and 242d are connected to the traveling device 250, so that the weight of the weight body 242b is transmitted to the traveling device 250 to drive the traveling device 250 to move on the cross frame 230 in a direction approaching the second stand 220.

More specifically, one end of the cable 242c connected to the running gear 250 is connected to the messenger 410 via a second guide wheel 253a provided on the main body 251. The axis of the second guide wheel 253a is vertical, and the guy cable 242c turns 90 degrees after winding one fourth of the outer peripheral surface of the second guide wheel 253a, so that the guy cable originally parallel to the cross frame 230 is changed into the guy cable perpendicular to the cross frame 230, and is collinear with the carrier cable 410 to realize connection. The weight of the counterweight 242b provides power not only to move the running gear 250 but also to tension the messenger wire 410.

The structures and the connection relations of the first driving mechanism 141, the second driving mechanism 142 and the traveling device on the cross frame 130 are the same as above, and are not described herein again.

According to the technical scheme, only two driving devices for active driving are needed, so that the walking device 150 and the walking device 250 can move synchronously, and the difficulty and the cost of electrification control are reduced. In addition, the gravity of the counterweight body 242b is used for providing driving force and tensioning the carrier cable 410, other mechanisms are not needed for driving, the structure is simple and reliable, and energy is saved. The traveling device 250 is driven to move by the movable pulley block, so that the requirement on the power of the motor can be reduced.

In some alternative embodiments, the cables 242c and 242d may be directly connected to the body 251. In other alternative embodiments, the weight body 242b is connected to the traveling device 250 through a cable and a guide wheel.

In some alternative embodiments, the first driving mechanism 241 and the second driving mechanism 242 can be solutions of the actuating member 241a, the winding drum 241b and the pulling cable 241 c. In other alternative embodiments, the first driving mechanism 241 may also be a nut-and-screw mechanism, the nut is fixed on the running gear 250, the screw is parallel to the cross frame 230, and the motor drives the screw to rotate forward and backward to realize the reciprocating movement of the running gear 250. In alternative embodiments, the running gear 250 may also be driven along the cross-frame 230 by pneumatic means, hydraulic means, or a rack and pinion system. In other alternative embodiments, the traveling device 250 may be driven to reciprocate along the cross frame 230 by a slider-crank mechanism.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a gravity balance device according to an embodiment. In fig. 7, the other structure shown in the present embodiment is the same as that shown in fig. 4 except for the weight balancing device.

Under the state of not being influenced by external force, the telescopic mechanism can be in the retraction state under the action of the self gravity, and the gravity of the telescopic mechanism needs to be overcome when the telescopic mechanism is driven to extend. The gravity balancing device is coupled to the slider 812 and applies an upward balancing force to the slider, thereby balancing the weight of the telescoping mechanism and reducing the force required to drive the telescoping mechanism to extend.

In this embodiment, the gravity balance device includes a pulley 816, a lifting rope 817, and a counterweight 818, the pulley 816 is disposed on the top of the column 800 and is located above the slider 812, one end of the lifting rope 817 is connected to the slider 812, and the other end of the lifting rope 817 passes around the pulley 816 and is connected to the counterweight 818, and the gravity of the counterweight 818 is converted into an upward pulling force on the slider 812.

In some alternative embodiments, the gravity balancing device is a spring coupled to the slider 812, the spring having an initial amount of compression or extension, the upward force of the spring on the slider 812 being less than the weight of the telescoping mechanism, and being capable of balancing the weight of a portion of the telescoping mechanism. More specifically, in other alternative embodiments, the spring is a compression spring that is positioned below the slider 812. When the telescopic mechanism is in a retracted state, the slider 812 is located at a lower position, and at this time, the pressure spring is compressed, and the elastic force of the pressure spring balances the gravity of most of the telescopic mechanism. In this state, the force required to drive the telescopic mechanism to extend outward is small. And the spring can provide certain damping during the movement of the slider 812, so that the movement process is smooth. The compression spring below the slider 812 can also play a role in buffering and protecting, for example, when the slider 812 falls, the compression spring below the slider can reduce impact when the slider 812 falls. Of course, the compression spring may be replaced with a tension spring that is disposed above the slider 812 and pulls the slider 812 by a tensile force.

Further, the slider 812 is also subjected to a frictional force with the column when moving up and down, and in order to reduce the frictional force, a pulley 819 is further provided to the slider 812 to convert the sliding friction between the slider 812 and the column 800 into rotational friction. In this embodiment, the wheelset 819 is located on the track-facing side of the slider 812. The contact wire assembly requires a greater force when pulling the retraction mechanism outward relative to the retraction of the retraction mechanism. Moreover, when the telescopic mechanism is pulled to extend, a part of component force presses one side of the sliding block 812 facing the rail against the surface of the upright column 800, and the wheel set 819 is arranged at the position, which is more beneficial to reducing the friction force between the sliding block 812 and the upright column 800, so that the requirement for power when the telescopic mechanism is pulled to extend is reduced.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A mobile contact net system for providing electrical support for rail transit, comprising a movable contact wire assembly, further comprising:

the first portal and the second portal are provided with a vertical frame and a transverse frame, the transverse frame crosses over the track, and the second portal and the first portal are arranged at intervals;

the two power devices are respectively arranged on the crossbearers of the first portal and the second portal and are respectively connected with two ends of the movable contact line assembly, each power device comprises a driving device and a traveling device, the traveling devices are connected with the tail ends of the movable contact line assemblies, each driving device comprises a first driving mechanism and a second driving mechanism, the first driving mechanism is used for driving the traveling devices to move on the crossbearers along a first direction, the second driving mechanism is used for driving the traveling devices to move on the crossbearers along a second direction, the first direction is opposite to the second direction, and the traveling devices can drive the contact line assemblies to move when traveling;

a plurality of columns arranged between the first portal and the second portal; and

the telescopic mechanism is arranged on the upright post and comprises a rocker arm, a sliding block and a connecting rod, the rocker arm is hinged to the upright post, the sliding block is arranged on the upright post and can slide along the length direction of the upright post, the connecting rod is connected with the sliding block and the rocker arm in a hinged mode, and the tail end of the connecting rod is connected with the contact line assembly;

the first gantry, the second gantry and the upright post are erected along a track, the walking device can drive the contact wire assembly to move so that the contact wire assembly can approach or depart from the upright post in the horizontal direction, and the telescopic mechanism is used for stretching and retracting along with the movement of the contact wire assembly and supporting the contact wire assembly.

2. The system of claim 1, wherein the links include first and second links of equal length, each of the first and second links being hingedly connected to the slider and collectively connecting and supporting the wire contact assembly as part of a parallelogram linkage.

3. The moving contact net system according to claim 1 or 2, wherein a length of the rod body between a hinge point on the link connected to the rocker arm to a free end of the link is equal to a length of the rocker arm.

4. The system of claim 3, wherein the hinge point on the link to the rocker arm is a midpoint of the link.

5. The system as recited in claim 1 wherein the slider is provided with a set of wheels for reducing friction between the slider and the column as the slider moves along the column.

6. The system of claim 5, wherein the set of wheels is located on a side of the slider facing the track.

7. The system as recited in claim 1 wherein the posts have a gravity balancing device disposed thereon, the gravity balancing device connecting the shoe and applying an upward balancing force to the shoe.

8. The mobile touch screen system of claim 7, wherein the gravity balancing device is a spring that provides a balancing force that is less than the weight of the telescoping mechanism.

9. The moving touch screen system of claim 8, wherein the springs are compression springs located below and supporting the slides.

10. The mobile touch screen system of claim 7, wherein the gravity balancing device comprises a pulley disposed on the column above the slider, a sling having one end connected to the slider and the other end connected to the counterweight by passing around the pulley, and a counterweight having a weight that translates into an upward pulling force on the slider.

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