A new type of EMU bogie replacement unit

Abstract

The present invention discloses a new type of EMU bogie replacement unit, comprising: a main structure, a head support mechanism and a ballast bed mechanism; the head support can be self-driven along the head support track to achieve alignment between itself and the EMU vehicle mounting point; the ballast bed mechanism comprises a ballast bed and a lifting mechanism; the ballast bed is provided with a track; the lifting mechanism drives the ballast bed to reciprocate along the height direction, so that the track selectively docks with the fixed track to form a continuous track or docks with the negative first working layer; when the lifting mechanism drives the ballast bed to a lifting state, the track docks with the fixed track to form a continuous track; when the lifting mechanism drives the ballast bed to descend from the lifting state to the first descending state, the track docks with the negative first working layer, and the head support lifts the carriage. The synchronous lifting of the present invention is easy to control, applicable to the replacement operation of all types of EMU bogies, and can effectively utilize underground space for maintenance operations.

Description

Technical Field

[0001] The invention belongs to the technical field of pit-type car lifting machines, and more specifically, relates to a novel EMU bogie replacement unit. Background Art

[0002] The existing pit-type car lifting machines are all equipped with bogie lifting devices with lifting rails and car body lifting devices arranged on both sides of the car body in several pits at a certain interval; and there are fixed tracks on the ground between adjacent pits, and the adjacent lifting tracks and fixed tracks together form a continuous track, which is convenient for the carriage and bogie to travel. Generally, one carriage is equipped with two bogies, and one bogie needs to be equipped with two bogie lifting devices relatively arranged on both sides of the car body. When inspecting the train, multiple bogie lifting devices are first required to lift the entire train at the same time, and the entire train leaves the ground and is lifted to a certain height, and then the car body lifting device is raised to a certain height and extends into the car lifting seat arranged on both sides of the train, and then the staff can separate the bogie and car body of the train, and then the bogie lifting device carrying the unloaded bogie descends to the ground and is arranged flush with the fixed track, and the bogie can be moved along the continuous track, and the car body is lifted by the car body lifting device. After all the bogies are removed, the staff can inspect the train.

[0003] Since the entire train needs to be lifted to a certain height, the existing pit-type car lifting machine has extremely high requirements for the synchronization of the bogie lifting device; at the same time, since the bogie lifting device and the car body lifting device are fixedly installed on both sides of the carriage, the tolerance for train parking errors is extremely low (when the train stops, it is necessary to ensure that the bogie is parked on the bogie lifting device, and the position correspondence between the lifting seat and the car body lifting device must be ensured), so the parking operation requirements for the driver are also extremely high; what's more, since there is a certain distance between adjacent pits, in order to ensure the continuity of the lifting track and the fixed track, the engineering volume and cost of pit excavation and the construction of the entire car lifting machine are large; what's more, since the bogie lifting device and the car body lifting device are both fixedly installed, the existing pit-type car lifting machine is only suitable for trains with a specific car length, but the train models produced in my country are not uniform, therefore, the scope of application of the existing pit-type car lifting machine is very limited and all are ground operations, resulting in a large area of ​​train maintenance base and high construction costs. Summary of the invention

[0004] In view of the above defects or improvement requirements of the prior art, the present invention provides a new type of EMU bogie replacement unit. The new type of EMU bogie replacement unit comprises:

[0005] The main body structure, the head support mechanism and the track bed mechanism; the two main body structures are arranged on both sides of the carriage; the head support mechanism includes a head support and a head support running rail; the head support can be self-driven along the head support running rail to achieve alignment between itself and the EMU vehicle mounting point; the head support running rail is arranged on the main body structure and extends along the track direction; the track bed mechanism includes a track bed and a lifting mechanism; the track bed is provided with a track; the lifting mechanism is connected to the track bed, and the lifting mechanism drives the track bed to reciprocate along the height direction, so that the track selectively moves with the track The fixed rails are connected to form a continuous rail or connected to the negative one working layer; when the lifting mechanism drives the roadbed to the lifting state, the rails are connected to the fixed rails to form a continuous rail, and the car enters the roadbed along the continuous rails; when the lifting mechanism drives the roadbed to descend from the lifting state to the first descending state, the rails are connected to the negative one working layer, and the roadbed carried by the bogie removed from the car is descended to the negative one working layer, and the supporting head lifts the car so that the car is suspended above the roadbed in the height direction.

[0006] Optionally, the head support rail is arranged below the fixed rail in the height direction; when the lifting mechanism drives the ballast bed to a lifted state, the rail is docked with the fixed rail to form a continuous rail, and the carriage enters the ballast bed along the continuous rail; when the lifting mechanism drives the ballast bed to descend from the lifted state to a second lowered state, the carriage follows the ballast bed to descend to a lifted state, and the head support moves along the head support rail to achieve alignment with the EMU vehicle frame point; when the lifting mechanism drives the ballast bed to descend from the second lowered state to the first lowered state, the rail is docked with the negative one working layer, and the ballast bed carrying the bogie removed from the carriage descends to the negative one working layer, and the head support lifts the carriage so that the carriage is suspended above the ballast bed in the height direction.

[0007] Optionally, the main structure includes a support plate extending along the track direction and a support column extending along the height direction; the head support rail is installed on the support plate; the support column is provided with a receiving groove on the side close to the carriage, and the lifting mechanism is installed in the receiving groove; the roadbed and the support column are matched in a concave and convex manner, so that the roadbed can slide on the support column along the height direction.

[0008] Optionally, the roadbed is provided with a working channel on the inner side of the track along the height of the vehicle body, and the working channel is provided with a lifting platform. The lifting platform includes a workbench and a lifting mechanism, and the lifting mechanism drives the workbench to reciprocate along the height direction of the vehicle body.

[0009] Optionally, the lifting mechanism includes a first lifting mechanism and a second lifting mechanism, the first lifting mechanism is installed on the second lifting mechanism, so that the second lifting mechanism can drive the first lifting mechanism to reciprocate along the height direction; the first lifting mechanism is connected to the track bed, so that the first lifting mechanism can drive the track bed to reciprocate along the height direction.

[0010] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0011] 1. The present invention provides an innovative pit-type car-lifting machine. A plurality of new-type EMU bogie replacement units can be connected end to end to form a dynamic track composed of tracks arranged on the roadbed. Before the train enters the maintenance station, the dynamic track forms a continuous track with the fixed track fixed on the ground. The train enters the maintenance station along the continuous track. After the train enters the dynamic track and the carriage is lifted by the lifting head, the disassembled bogie is lowered to the negative one working layer together with the roadbed, while the train is still parked on the working layer provided with the fixed lifting head running rail, and the transfer of the bogie is not on the same plane as the train. In summary, the present invention realizes a completely different way of lifting the train from the prior art. The entire train only needs to stop on the dynamic track, and the support head can move along the track direction by itself to match the EMU car-raising point, thereby greatly improving the error tolerance of the train stop. At the same time, since the train stops on the dynamic track, and the dynamic track forms a continuous track with the fixed track before the train enters the station, when forming the continuous track, only the lifting stroke of the roadbed is required, and the synchronization requirement for the lifting of the roadbed is very small. When the present invention is applicable to different trains at the EMU car-raising points with equal or unequal distances and equal heights, the support head running rail can be set at the setting There is a working layer (such as the ground layer) with a fixed head support rail. At this time, the present invention has no requirements for the synchronization of the lifting mechanism. The head support and the EMU car-raising point can be set at the same height; when the present invention is applicable to different trains at EMU car-raising points arranged at any height or distance, the head support rail is laid below the fixed head support rail, and the distance that the roadbed drives the train to descend synchronously (the distance between the EMU car-raising point and the ground head support rail) is also much smaller than the existing synchronous lifting distance (the height required for maintenance by the staff, generally the height of the staff walking upright), which also reduces the synchronization requirements compared to the prior art. More preferably, the maintenance space of the train of the present invention is located in the underground space, and does not occupy the ground layer and the space above at all, which greatly improves the space utilization rate. At the same time, since the present invention is applicable to different train models and has a wide range of applications, it is not necessary to set a maintenance track for each train model, which greatly reduces the floor area of ​​the maintenance station; more preferably, the entire maintenance space of the present invention is an integral type (no fixed track is required between adjacent roadbeds), which is easy to build and low in cost.

[0012] 2. The track bed of the present invention is provided with a lifting platform, so that the staff can inspect the train on the track bed, thereby improving the convenience of the staff's inspection.

[0013] 3. When the lifting mechanism of the present invention is a secondary lifting mechanism, each lifting mechanism (i.e., the first lifting mechanism and the second lifting mechanism) can be driven separately, and the segmented control simplifies the complexity and difficulty of the procedure of the present invention, simplifies the process and is easy to control.

[0014] 4. The present invention positions each support head through a position sensor, thereby realizing the control of the running track of each support head, thereby ensuring that the support head can meet the matching of EMU vehicle mounting points that are not equidistant along the track direction.

[0015] 5. The supporting head of the present invention has the performance of self-driving and aligning with the EMU loading point, which greatly improves the adaptability and coordination of the present invention.

[0016] 6. Each bogie replacement system compatible with all types of EMUs of the present invention can operate synchronously or independently, and can carry out targeted maintenance on the entire train or a certain carriage of the train, changing the existing fixed maintenance mode that requires the entire train to be lifted as a whole to achieve overall or partial maintenance of the train, greatly improving the diversity of the operation of the present invention and the flexibility, convenience, and targeting of its use, and adaptively reducing the use cost of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of an embodiment of the present invention;

[0018] Figure 2 It is a schematic structural diagram of an embodiment of the head support track of the present invention;

[0019] Figure 3 A schematic diagram of the structure of the present invention when carrying a bogie;

[0020] Figure 4 It is a schematic diagram of the structure of another embodiment of the present invention;

[0021] Figure 5 It is a structural schematic diagram of a train entering the present invention.

[0022] In all the drawings, the same reference numerals represent the same technical features, specifically: 11-main structure, 111-support plate, 112-support column, 120-support head, 121-self-driving component, 122-telescopic component, 123-support head walking rail, 1231-I-shaped part, 1232-walking track, 1233-slot, 1234-connecting plate, 1235-abutment plate, 131-ballast bed, 1311-track, 1312-working channel, 1313-support column, 132-lifting mechanism, 1331-workbench, 1332-lifting mechanism, 141-shield, 142-support frame, 2-negative working layer, 31-carriage, 32-bogie. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. In the present invention, for the sake of convenience of explanation, the upper and lower in this article refer to the upper and lower along the height direction of the car (i.e., the height direction), the track direction is the length direction of the car, and the car width direction is the width direction of the car (i.e., the left and right direction of the car), which does not fully represent the actual situation.

[0024] In one embodiment of the present invention, Figure 1-5 As shown, a bogie replacement system compatible with all types of EMUs comprises: a main structure 11, a head support mechanism and a ballast mechanism; two main structures 11 are arranged on both sides of a carriage 31; the head support mechanism comprises a head support 120 and a head support running track 123; the head support 120 can be self-driven along the head support running track 123 to achieve alignment between itself and the EMU loading point; the head support running track 123 is arranged on the main structure 11 and extends along the track direction; the ballast mechanism comprises a ballast 131 and a lifting mechanism 132; the ballast 131 is provided with a track 1311; the lifting mechanism 132 is connected to the ballast 131, and the lifting mechanism 132 drives the ballast 131 along the height direction It makes reciprocating motion, so that the track 1311 selectively docks with the fixed track to form a continuous track or docks with the negative one working layer 2; when the lifting mechanism 132 drives the roadbed 131 to the lifting state, the track 1311 docks with the fixed track to form a continuous track, and the car 31 enters the roadbed 131 along the continuous track; when the lifting mechanism 132 drives the roadbed 131 from the lifting state to the first lowering state, the track 1311 docks with the negative one working layer 2, and the roadbed 131 carrying the bogie 32 removed from the car 31 descends to the negative one working layer 2, and the supporting head 120 lifts the car 31, so that the car 31 is suspended above the roadbed 131 in the height direction.

[0025] In practical applications, the fixed track of the train, especially the EMU, is generally set on the ground. Therefore, in the prior art, when the train needs to be inspected, the train is lifted off the ground by the car body lifting device and the bogie 32 lifting device to facilitate the staff to disassemble and assemble the bogie 32 under the car or inspect the train. However, the present invention does not need to lift the train, and the train always stays on the ground. Specifically, before the train is about to enter the train maintenance base, the lifting mechanism 132 drives the roadbed 131 to rise to the level with the ground, so that the tracks 1311 of the multiple roadbeds 131 together with the fixed track form a continuous track, so that the train can completely enter the movable continuous track formed by the tracks 1311 of the roadbed 131 along the continuous track. However, the present invention has no synchronization requirements for each lifting mechanism 132 to lift the roadbed 131. As long as the roadbed 131 is finally lifted to the level with the ground, it is not necessary to require multiple bogie 32 lifting devices to synchronously lift the train like the prior art, and the synchronization of synchronous lifting is still a technical problem faced by this field. Finally, the supporting head 120 will drag the carriage 31 on the ground level, and the bogie 32 removed from the carriage 31 will descend to the negative one working layer 2 (i.e., the underground layer below the ground level) along with the roadbed 131, and the staff can dismantle the bogie 32 and inspect the bottom of the carriage 31 on the roadbed 131, transferring the staff's inspection space from the ground to the underground, freeing up the ground working space. More preferably, after the train enters the roadbed 131 and stops successfully, the supporting head 120 moves along the supporting head running rail 123 to the bogie 32 aligned with it, so that the present invention is applicable to more types of trains, with stronger practicality and applicability, thereby effectively reducing the floor space and construction cost of the train maintenance base. Furthermore, there is no fixed track between adjacent ballasts 131, and there is no need to perform interval excavation corresponding to the positions of the bogie 32 lifting device and the car body lifting device and the fixed track as in the prior art. The ballasts 131 of the present invention are all concentrated at the end of the fixed track and are the continuation of the fixed track. They can be excavated together and only need to be excavated once, which is easy to implement, excavate, and arrange and build various structures.

[0026] Optionally, the main structure 11 includes a support plate 111 extending along the track direction and a support column 112 extending along the height direction; the head support rail 123 is installed on the support plate 111. In practical applications, multiple support columns 112 are arranged in sequence along the track direction, and one or more support plates 111 are spliced ​​in sequence along the track direction to form a continuous support track; the corresponding one or more head support rails 123 are spliced ​​in sequence along the track direction to form a continuous head support rail, and similarly, the adjacent roadbed 131 is also spliced ​​to form a movable continuous track for easy entry of trains. When the bogies 32 of trains of different types or the same type are at the same height relative to the ground, regardless of whether the adjacent bogies 32 are equidistant, the main structure 11 of the present invention can be installed on the ground so that the support plate 111 is higher than the ground, and then the height of the head support 120 is just set at the same height as the bogie 32 of the train.

[0027] Optionally, the lifting mechanism 132 is a screw pair, including a motor, a nut, a screw, and a guide. The guide extends in the height direction. A motor box is provided at the lower end of the guide, and the motor is arranged in the motor box. A concave-convex matching part is provided at the contact point between the guide and the roadbed 131 to ensure the linearity of the roadbed 131 when it reciprocates in the height direction. One end of the screw is connected to the motor, and the other end of the screw is connected to the upper end of the guide; the nut is fixed to the roadbed 131. In practical applications, multiple pairs (more than one pair) of lifting mechanisms 132 correspond to one roadbed 131, and multiple pairs of lifting mechanisms 132 are arranged at intervals along the track direction, and each pair of lifting mechanisms 132 is arranged on both sides of the roadbed 131 along the vehicle width direction. It can be understood that since the extension direction of the guide and the support column 112 is the same, the guide and the support column 112 can be one component.

[0028] Optionally, the roadbed 131 is provided with a working channel 1312 along the vehicle body height on the inner side of the track 1311, and the working channel 1312 is provided with a lifting platform, and the lifting platform includes a workbench 1331 and a lifting mechanism 1332, and the lifting mechanism 1332 drives the workbench 1331 to reciprocate along the vehicle body height direction. Optionally, the lifting mechanism 1332 is installed on the roadbed 131. Specifically, the roadbed 131 includes a left roadbed provided with a left track, a right roadbed provided with a right track, and a supporting column 1313; the left track and the right track together form the track 1311; the left roadbed and the right roadbed are relatively spaced in the vehicle width direction, so that the space between the left roadbed and the right roadbed forms the working channel 1312; and the left roadbed and the right roadbed are both installed above the supporting column 1313; and the left roadbed and the right roadbed are provided with lifting channels corresponding to the lifting mechanism 1332, and the lifting channels extend in the height direction. Optionally, with the reciprocating motion of the lifting mechanism 1332, the upper surface of the workbench 1331 can be selectively set flush with the upper surface of the ballast 131 or lower than the upper surface of the ballast 131. In practical applications, when the staff needs to disassemble the bogie 32 or inspect the undercarriage, the workbench 1331 is lowered to a certain distance below the upper surface of the ballast 131, so that the upper surface of the workbench 1331 and the upper surface of the ballast 131 form a workspace that is convenient for the staff to walk. In this way, the staff can stand on the workbench 1331 and disassemble the bogie 32 located on the track 1311 and connected to the carriage 31 or inspect the undercarriage in the workspace. Of course, the staff can also disassemble and assemble the bogie 32 only through the workbench 1331. The inspection of the vehicle bottom can be done after the bogie 32 is disassembled, the bogie 32 is lowered to the negative first working layer 2 together with the roadbed 131, and the bogie 32 is transferred from the roadbed 131 to another position, and the upper surface of the workbench 1331 is flush with the upper surface of the roadbed 131, and the staff can directly stand on the roadbed 131 flush with the negative first working layer 2 to inspect the vehicle bottom. It is worth noting that the status of the workbench 1331 and the roadbed 131 can be programmed according to actual needs to meet the purpose of the staff disassembling and assembling the bogie 32 and inspecting the vehicle bottom, which will not be repeated here.

[0029] Optionally, the supporting head 120 includes a self-driving component 121, a telescopic component 122 and an image sensor; the self-driving component 121 includes a motor, an encoder, a mounting frame, a roller, a transmission shaft and an abutment portion; the mounting frame includes an inner plate, an outer plate and a mounting plate, the inner plate and the outer plate are relatively arranged on the outer side of the mounting plate along the vehicle width direction, the two ends of the transmission shaft are respectively axially connected to the inner plate and the outer plate, and the roller is sleeved on the transmission shaft; the motor is connected to the transmission shaft, and the encoder is installed on the rotating shaft of the motor; the abutment portion is arranged on the mounting frame and It is arranged opposite to the roller along the height direction, and the abutting portion abuts against the head support running rail 123 along the height direction, the abutting portion and the head support running rail 123 form sliding friction or rolling friction, and the roller and the head support running rail 123 form rolling friction; the telescopic component 122 and the image sensor are both installed on the mounting frame and are both arranged toward the carriage 31; when the telescopic component 122 is in an extended state, the telescopic component 122 lifts the carriage 31; when the telescopic component 122 is in a retracted state, the telescopic component 122 is away from the carriage 31.

[0030] Optionally, the head support track 123 includes a connecting plate 1234 and two I-shaped members 1231, the two I-shaped members 1231 are arranged at intervals in the vehicle width direction, and the two ends of the connecting plate 1234 are respectively connected to the side of an I-shaped member 1231 close to each other; the I-shaped member 1231 includes an upper plate, a lower plate and a vertical plate, the upper plate and the lower plate are arranged at intervals in the height direction, one end of the vertical plate is connected to the upper plate, and the other end of the vertical plate is connected to the lower plate, so that the I-shaped member 1231 forms two slots 1233 arranged in the vehicle width direction, wherein the two ends of the connecting plate 1234 are respectively connected to the two I-shaped members 1231 The mutually close slots 1233 form a concave-convex fit, and the two slots 1233 closest to the car 31 and farthest from the car 31 are provided with abutment parts, which are in contact and connected with the lower surface of the upper plate, and the upper surface of the upper plate forms a running track 1232 for the roller to run. The abutment part not only ensures the linearity of the self-walking of the supporting head 120, but also effectively ensures that the supporting head 120 will not roll over when towing the car 31, thereby ensuring the load-bearing performance of the supporting head 120, and at the same time avoiding structural friction between the roller and the supporting head running track 123 due to the load, thereby ensuring the linearity of the transmission shaft and the safety and reliability of the self-walking of the roller.

[0031] Optionally, in order to reduce the difficulty of the supporting head 120 to move by itself, the abutment part is an abutment wheel. Preferably, an abutment plate 1235 is provided between the upper plate and the abutment wheel, and at this time, the abutment wheel contacts the abutment plate 1235. The abutment wheel can be directly connected to the inner plate and the outer plate. Optionally, the telescopic assembly 122 includes a driving assembly and a supporting member, and the driving assembly and the supporting member reciprocate along the vehicle width direction.

[0032] Optionally, the head support track 123 is provided with a plurality of position sensors for positioning the head support 120. Each type of train is provided with a corresponding position sensor, so each head support 120 is provided with a corresponding position sensor of each type. When the present invention is applicable to two types of trains, each head support 120 is provided with two position sensors; when the present invention is applicable to five types of trains, each head support 120 is provided with five position sensors.

[0033] In another embodiment of the present invention, Figure 1-5 As shown, different from the above embodiment, the head support track 123 is arranged below the fixed track in the height direction; when the lifting mechanism 132 drives the ballast 131 to the lifting state, the track 1311 is docked with the fixed track to form a continuous track, and the car 31 enters the ballast 131 along the continuous track; when the lifting mechanism 132 drives the ballast 131 to descend from the lifting state to the second descending state, the car 31 follows the ballast 131 to descend to the lifting state, and the head support 120 moves along the head support track 123 to achieve its alignment with the EMU vehicle erection point; when the lifting mechanism 132 drives the ballast 131 to descend from the second descending state to the first descending state, the track 1311 is docked with the negative first working layer 2, the ballast 131 carrying the bogie 32 removed from the car 31 descends to the negative first working layer 2, and the head support 120 lifts the car 31 so that the car 31 is suspended above the ballast 131 in the height direction. Optionally, the main structure 11 includes a support plate 111 extending along the track direction and a support column 112 extending along the height direction; the head support track 123 is installed on the support plate 111; the support column 112 is provided with a receiving groove on the side close to the carriage 31, and the lifting mechanism 132 is installed in the receiving groove; the roadbed 131 and the support column 112 are matched in a concave-convex manner, so that the roadbed 131 can slide on the support column 112 along the height direction. In practical applications, the lower end of the support column 112 can be fixed to the negative one working layer 2. Optionally, a shielding plate 141 set flush with the ground is laid above the head support mechanism in the height direction; when the roadbed 131 is in a lifted state, the upper surface of the roadbed 131 in the height direction is set flush with the shielding plate 141 (that is, the upper surface of the roadbed 131 is set flush with the ground). Optionally, the baffle plate 141 is supported by a supporting frame 142; thereby, the present invention is applicable to any type of train, and the roadbed 131 can adjust the lowering distance between the lifting state and the second lowering state according to the height of the bogie 32 of different trains, and the supporting head 120 can also adjust its traveling distance according to the spacing distance of the bogies 32 of different trains; at the same time, all components are not higher than the ground height and do not occupy the ground space at all.

[0034] In another embodiment of the present invention, different from the above embodiment, the lifting mechanism 132 of this embodiment includes a first lifting mechanism and a second lifting mechanism, the first lifting mechanism is installed on the second lifting mechanism, so that the second lifting mechanism can drive the first lifting mechanism to reciprocate along the height direction; the first lifting mechanism is connected to the roadbed 131, so that the first lifting mechanism can drive the roadbed 131 to reciprocate along the height direction. In this way, the first lifting mechanism can be responsible for switching the roadbed 131 between the lifting state and the second lowering state, and the second lifting mechanism can be responsible for switching the roadbed 131 between the second lowering state and the first lowering state. Different from the above embodiment, which directly realizes the two-stage lifting control of the lifting mechanism 132 through the screw pair, this embodiment realizes the segmented control of the lifting mechanism 132.

[0035] In another embodiment of the present invention, different from any of the above embodiments, the supporting head 120 may not be provided with an abutting portion, and the roller directly moves in the slot 1233 .

[0036] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of EMU bogie replacement unit, characterized in that: At the same time, all components are no higher than the ground, including: Main structure, head support mechanism and ballast bed mechanism; The two main structures are arranged on both sides of the carriage; The head support mechanism comprises a head support and a head support track; the head support can be self-driven along the head support track to achieve alignment between itself and the EMU vehicle loading point; the head support track is arranged on the main frame and extends along the track direction; The ballast mechanism includes a ballast and a lifting mechanism; the ballast is provided with a track; the lifting mechanism is connected to the ballast, and the lifting mechanism drives the ballast to reciprocate in the height direction, so that the track selectively docks with a fixed track to form a continuous track or docks with a negative one working layer; When the lifting mechanism drives the ballast bed to a lifted state, the track is docked with the fixed track to form a continuous track, and the carriage drives into the ballast bed along the continuous track; When the lifting mechanism drives the ballast bed to descend from the lifting state to the first descending state, the track docks with the negative first working layer, the ballast bed carrying the bogie removed from the carriage descends to the negative first working layer, and the supporting head lifts the carriage so that the carriage is suspended above the ballast bed in the height direction; The head support track is arranged below the fixed track along the height direction; When the lifting mechanism drives the ballast bed to a lifted state, the track is docked with the fixed track to form a continuous track, and the carriage drives into the ballast bed along the continuous track; When the lifting mechanism drives the ballast bed to descend from the lifting state to the second descending state, the carriage follows the ballast bed to descend to the lifting state, and the supporting head moves along the supporting head running rail to achieve alignment with the EMU vehicle frame point; When the lifting mechanism drives the roadbed to descend from the second descending state to the first descending state, the track is docked with the negative one working layer, the roadbed carried by the bogie removed from the car is descended to the negative one working layer, and the supporting head lifts the car so that the car is suspended above the roadbed in the height direction.

2. The new EMU bogie replacement unit according to claim 1, characterized in that: The main structure includes a support plate extending along the track direction and a support column extending along the height direction; the head support rail is installed on the support plate; the support column is provided with a receiving groove on the side close to the carriage, and the lifting mechanism is installed in the receiving groove; the roadbed and the support column are matched in a concave-convex manner, so that the roadbed can slide on the support column along the height direction.

3. The new EMU bogie replacement unit according to claim 1, characterized in that: The roadbed is provided with a working channel on the inner side of the track along the height of the vehicle body. The working channel is provided with a lifting platform. The lifting platform includes a workbench and a lifting mechanism. The lifting mechanism drives the workbench to reciprocate along the height direction of the vehicle body.

4. The new EMU bogie replacement unit according to claim 1, characterized in that: The lifting mechanism includes a first lifting mechanism and a second lifting mechanism. The first lifting mechanism is installed on the second lifting mechanism, so that the second lifting mechanism can drive the first lifting mechanism to reciprocate along the height direction; the first lifting mechanism is connected to the track bed, so that the first lifting mechanism can drive the track bed to reciprocate along the height direction.

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