Novel steel wheel crawler-type highway-railway dual-purpose chassis

Abstract

A novel steel wheel crawler-type highway-railway dual-purpose chassis mainly comprises a telescopic crawler-type chassis, a steel wheel device and a rotary platform. Connecting frames on the two sides of the telescopic crawler-type chassis can adjust the distance between the left crawler belt and the right crawler belt through telescopic oil cylinders, and the requirement that the whole machine walks in a ballastless track bed surface layer pit and the surface of a ballastless track plate and a ballast track bed is met. Steel wheel devices with power are arranged in front of and behind the working platform and are suitable for walking under the rail working condition after steel rails are laid; and by controlling the lifting oil cylinder of the steel wheel device, the steel wheel can fall off the rail and be suspended, so that the highway-railway dual-purpose running state is switched. A cab, a hydraulic system, an electrical system and different rail construction working devices can be carried on the working platform of the steel wheel crawler-type highway-railway dual-purpose chassis, and the steel wheel crawler-type highway-railway dual-purpose chassis has important significance on safe, efficient and convenient rail line construction and line operation overhaul and maintenance.

Description

Technical Field

[0001] This patent relates to a traveling chassis of construction machinery, and in particular to a road-rail dual-purpose chassis used for vehicles for track line construction projects. Background Art

[0002] With the development of society and economy, the demand for rail vehicles has increased rapidly. The operation of rail vehicles requires the construction of supporting facilities, such as tracks, platforms, cables, etc. Under normal circumstances, after the track is laid, a special rail engineering vehicle will run on the track to carry out the next step of facility installation and construction. However, due to the current large demand for track construction, under tight construction schedules and heavy tasks, it is often the case that track plates are laid but rails are not laid, or when both track plates and rails are not laid, it is necessary to lay rails simultaneously with the laying of rails or lay other facilities first. In this working state, due to the lack of rails, rail engineering vehicles cannot arrive at the site, and only road-rail dual-use engineering vehicles can go to the site for construction. When track plates are laid but rails are not laid, engineering vehicles need to run on the track plates. At this time, engineering vehicles cannot damage the track plates or overturn. Most of the existing dual-purpose road-rail engineering machinery chassis adopt steel wheel + rubber wheel drive mode, which is suitable for both railway track running and road running. It is not designed for working conditions with laid track slabs. Therefore, its obstacle crossing ability and terrain adaptability are not as good as those of tracked dual-purpose road-rail vehicles.

[0003] Chinese patent CN112746646A discloses a chassis structure of a dual-purpose excavator for road and rail, which can travel on highways or ordinary roads through crawlers, or on rails without damaging the rails through running wheels, but its crawlers cannot adjust the width by amplitude, so it cannot meet the requirements of adapting to different roadbed widths and flexibly going up and down the track. Invention patent CN209938766U discloses a retractable crawler chassis, which can adjust the chassis width, ensuring both stable operation of the machine and passability, but the chassis width adjustment range is limited by the installation position and elongation of the oil cylinder. In response to the above problems, this patent proposes a retractable chassis for a road-rail dual-purpose vehicle that has both a rail steel wheel walking system and a crawler walking system. The crawler chassis has an adjustable width and a large telescopic range. It can adapt to ballastless trackless, ballasted trackless, and tracked working conditions, as well as driving in the surface pit of the ballastless line bed, and can efficiently and quickly get on and off the track to realize the switching of construction operations between railways and roads. Summary of the invention

[0004] The present invention aims at solving the above problems in the prior art and proposes a new type of steel wheel tracked dual-purpose road and rail chassis. To solve the above technical problems, the present invention adopts the following technical solution: a new type of steel wheel tracked dual-purpose road and rail chassis, mainly comprising: a retractable tracked chassis, a steel wheel device, and a rotary platform.

[0005] The retractable crawler chassis mainly includes a chassis center frame, a crawler assembly, a telescopic arm, a telescopic cylinder and a connecting frame; the crawler assembly installed on the connecting frames on the left and right sides of the chassis can adjust the spacing through the telescopic cylinder to meet the needs of the whole machine walking in the surface pit of the ballastless line subgrade and on the ballastless track bed plate and the surface of the ballasted track bed.

[0006] Preferably, two telescopic cylinders are fixedly installed in parallel at the bottom of the center frame of the chassis, and the installation directions of the two telescopic cylinders are opposite, telescoping toward the left and right sides; the ends of the piston rods of the telescopic cylinders are fixedly connected to the left and right connecting frames, respectively, and the track assemblies are installed on the connecting frames; four telescopic arms are installed inside the center frame of the chassis; the outer ends of the I, III telescopic arms and the II, IV telescopic arms are fixedly connected to the left and right connecting frames, respectively; when the telescopic cylinders are extended, the connecting frames are pushed to translate outward, and at the same time, the telescopic arms installed inside the center frame of the chassis are extended, thereby adjusting the spacing between the two track assemblies and maintaining the stability of the chassis.

[0007] Preferably, the track assembly uses a finished steel track, which is mainly composed of a steel track, a drive wheel, a guide wheel, a supporting wheel, a steel structure and two travel reducers. The travel reducer is composed of a motor, a gear box, a brake, a valve body, etc.

[0008] The steel wheel device mainly includes a steel wheel, a steel wheel driving device, a lifting cylinder, a mounting seat, a steel wheel frame and a wheel axle. There are two sets of steel wheel devices, which are fixedly installed in front and behind the working platform through the mounting seat and are used for running on the track surface after the steel rail is laid; the two ends of the lowering cylinder are respectively connected to the mounting seat and the steel wheel frame through a pin hinge; the steel wheel driving device is installed on the steel wheel frame; the lifting cylinder piston rod is extended to drive the steel wheel frame to rotate and descend, so that the steel wheel falls on the steel rail, and the retractable crawler chassis is suspended in the air at this time, so that the steel wheel can be guided on the rail; the lifting cylinder piston rod is retracted, and the steel wheel is suspended in the air. At this time, the retractable crawler chassis directly runs on the ballastless track bed plate, the ballasted track bed surface or the road surface.

[0009] The slewing platform mainly includes a driving motor, a housing, a worm, a slewing bearing and a working platform; the inner ring of the slewing bearing has no teeth and serves as a fixed ring, and the inner ring is connected to the chassis center frame by bolts; the outer ring of the slewing bearing has teeth and serves as a rotating ring that meshes with the worm, and the outer ring is connected to the working platform by bolts; the driving motor drives the worm to rotate, so that the outer ring of the slewing bearing rotates, thereby rotating the working platform.

[0010] Preferably, the slewing platform is mounted above the center frame of the chassis, and the working platform can carry a driver's cab, a hydraulic system, an electrical system and different track construction work devices.

[0011] More preferably, the drive motor of the slewing platform, the travel reducer of the track assembly, the telescopic cylinder of the telescopic crawler chassis, the lifting cylinder of the steel wheel device and the steel wheel drive device are all driven and controlled by the hydraulic system and electrical system installed on the working platform.

[0012] Preferably, the retractable crawler chassis and the steel wheel device are adjustable in position by the rotation of the revolving platform. When the retractable crawler chassis is in working state, its center line is in the same plane as the center line of the steel wheel device.

[0013] More preferably, when the vehicle goes onto the track from a road or a ballasted trackbed surface, the retractable crawler chassis first contacts and travels onto the track surface, the working platform rotates, and the lifting cylinder extends to align the steel wheel device and land on the rail.

[0014] More preferably, when the vehicle is traveling on track, the steel wheel device falls on the track surface, the retractable crawler chassis is suspended in the air, and its center line is in a vertical intersection position with the center line of the steel wheel device; when it is necessary to travel down the track, the lifting cylinder piston rod retracts, at which time the retractable crawler chassis contacts the rail and moves downward.

[0015] Preferably, the track assembly width is 400 mm. When the piston rod is fully retracted, the outer spacing of the two track assemblies is a minimum of 1650 mm. Since the line spacing of passenger and freight co-line railway is 5000 mm, the minimum width of the subgrade surface pit of the double track is 1750 mm, which meets the size requirements for driving and working in the subgrade surface pit between the double tracks of ballastless track.

[0016] More preferably, the maximum telescopic amount of the telescopic oil cylinder is 750 mm. When the piston rod of the telescopic oil cylinder is fully extended, the outer side spacing of the two crawler track assemblies is 3140 mm.

[0017] Preferably, when the retractable crawler chassis is in working condition, by adjusting the extension and retraction amount of the piston rod of the telescopic cylinder, it can travel on the surface of CRTSⅠ type (track bed width is 2800mm) and CRTSⅡ type ballastless track (standard track plate width is 2550mm) and mainline ballasted track (sleeper width is 2400mm) without laying rails.

[0018] The technical problem solved by this patent is to provide a chassis for a road-rail dual-purpose vehicle with both a crawler-type running device and a rail-wheeled running device, while ensuring that the crawler-type chassis has high working stability, passability and adaptability. Compared with the prior art, the advantages of the new steel wheel crawler-type road-rail dual-purpose chassis provided by the present invention are: (1) The crawler-type running and steel wheel-type running working conditions can be switched conveniently, and the upper and lower tracks, trackless and tracked states can be realized; (2) By adjusting the width of the retractable crawler-type chassis, it can adapt to various types of ballastless track ballast plates and ballasted track surfaces, and can be driven in the surface pit of the ballastless track double-track; (3) As a special chassis for rail engineering vehicles, a driver's cab, a hydraulic system and an electronic control system are installed above the working platform. Different working devices can be installed according to different construction requirements, such as tunnel wall drilling and hoisting equipment, contact network maintenance equipment, bridge detection equipment, etc. The chassis provided by this patent can ensure the stability, safety and multi-condition adaptability of engineering vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the appearance of a steel wheel tracked dual-purpose road and rail chassis; Figure 2 This is the axonometric drawing of the steel wheel tracked dual-purpose road and rail chassis; Figure 3 It is a schematic diagram of the bottom structure of the retractable crawler chassis (bottom view); Figure 4 The schematic diagram of the installation of the telescopic arm on the center frame of the chassis (cross-sectional top view); Figure 5 It is a schematic diagram of the steel wheel device; Figure 6 It is a working schematic diagram of the steel wheel device running on the rail surface under rail working conditions; Figure 7 It is a working schematic diagram of driving on the ballastless track bed under ballastless and trackless working conditions; Figure 8 This is a schematic diagram of driving in a pit on the surface of a ballastless line subgrade; Fig. 9 It is a working schematic diagram of running on the surface of ballasted trackless track; Fig.10 An operation example of an engineering vehicle with a steel wheel crawler dual-purpose road and rail chassis equipped with a working device; In the figure: 1-retractable crawler chassis; 2-steel wheel device; 3-slewing platform; 4-steel rail; 5-ballastless track bed plate; 6-base bed surface pit; 7-ballasted track bed surface; 11-chassis center frame; 12-crawler assembly; 13-telescopic arm; 14-telescopic cylinder; 15-connecting frame; 21-steel wheel; 22-steel wheel driving device; 23-lifting cylinder; 24-support seat; 25-steel wheel frame; 31-worm; 32-slewing bearing; 33-working platform. Implementation

[0020] In order to better understand the present invention, preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0021] A new type of steel wheel crawler dual-purpose road and rail chassis is used for switching between track wheel type and crawler type driving mode to adapt to ballastless trackless operation, ballastless base bed surface pit driving operation, ballasted trackless and other road conditions.

[0022] Example 1.1: Figure 1-Figure 5 As shown, a new type of steel wheel crawler type dual-purpose road and rail chassis mainly comprises a retractable crawler type chassis (1), a steel wheel device (2), and a slewing platform (3).

[0023] In this embodiment, the telescopic crawler chassis (1) comprises two telescopic cylinders (14) which are fixedly mounted in parallel at the bottom of the chassis center frame (11). The two telescopic cylinders (14) are mounted in opposite directions and telescope toward the left and right sides. The piston rod ends of the telescopic cylinders (14) are respectively fixedly connected to the left and right connecting frames (15), and the connecting frames (15) are mounted on the crawler assemblies (12). Four telescopic arms (13) are mounted inside the chassis center frame (11). The outer ends of the first and third telescopic arms (13) and the second and fourth telescopic arms (13) are respectively fixedly connected to the left and right connecting frames (15). When the telescopic cylinders (14) are extended, the connecting frames (15) are pushed to translate outward, and at the same time, the telescopic arms (13) mounted inside the chassis center frame (11) are extended, thereby adjusting the spacing between the two crawler assemblies (12).

[0024] In the present embodiment, the steel wheel device (2) mainly comprises a steel wheel (21), a steel wheel driving device (22), a lifting cylinder (23), a mounting seat (24), a steel wheel frame (25) and a wheel axle. The steel wheel device (2) comprises two sets, which are fixedly mounted at the front and rear of the working platform (33) via the mounting seat (24); the two ends of the lifting cylinder (23) are respectively connected to the mounting seat (24) and the steel wheel frame (25) via a pin hinge; and the steel wheel driving device (22) is mounted on the steel wheel frame (25).

[0025] In this embodiment, the slewing platform (3) is installed above the chassis center frame (11), and the slewing platform (3) mainly includes a driving motor, a housing, a worm (31), a slewing bearing (32) and a working platform (33); the inner ring of the slewing bearing (32) is toothless and serves as a fixed ring, and the inner ring is connected to the chassis center frame by bolts; the outer ring of the slewing bearing (32) has teeth and serves as a rotating ring that meshes with the worm (31), and the outer ring is connected to the working platform (33) by bolts; the driving motor drives the worm (31) to rotate, so that the outer ring of the slewing bearing (32) rotates, thereby rotating the working platform (33).

[0026] Example 1.2: Figure 2 As shown, the piston rod of the lifting cylinder (23) is controlled to extend, driving the steel wheel frame (25) to rotate and descend, so that the steel wheel (21) falls on the steel rail (4). At this time, the retractable crawler chassis (1) is suspended in the air, and the steel wheel driving device (12) drives the steel wheel (21) to rotate, so that the steel wheel (21) can be guided and driven on the steel rail (4); Figure 6 As shown, the working platform (32) is rotated by controlling the driving motor of the rotary platform (3).

[0027] Example 1.3: Figure 7 , Fig. 9 As shown, the crawler track assemblies (12) mounted on the connecting frames (15) on the left and right sides of the retractable crawler chassis (1) can adjust the spacing by the extension of the retractable oil cylinder (14), so as to meet the requirements of different widths of the vehicle chassis when the whole machine is running on the ballastless track bed plate (5) and the ballasted track bed surface (7).

[0028] In this embodiment, when the telescopic cylinder (14) reaches the maximum extension, the distance between the crawler assembly (12) reaches the maximum. At this time, the telescopic arm (13) is still partially inside the chassis center frame (11) to ensure the stability of the equipment during operation.

[0029] Example 1.4: Figure 8 As shown, when the telescopic oil cylinder (14) is at its minimum telescopic amount, the telescopic arm (13) installed inside the chassis center frame (11) is driven to be fully retracted, and the distance between the left and right crawler assemblies (12) of the crawler-type dual-purpose chassis for road and rail reaches a minimum value, which is suitable for driving in the subgrade surface pit (6) of the ballastless track double track.

[0030] Example 1.5: Fig.10As shown, a driver's cab, a hydraulic system and an electrical system are installed above the working platform (33) to control the operation and construction of the vehicle. In this embodiment, a tunnel wall drilling and column installation construction work device is also installed above the working platform (33). The operator turns on the hydraulic pump and motor to control the extension of the lifting cylinder (23) so that the steel wheel (21) contacts the rail (4) and the retractable crawler chassis (1) is suspended in the air; the lifting cylinder (23) is controlled to retract, the steel wheel device (2) is lifted, and the retractable crawler chassis (1) touches the ground, thereby realizing the switch between road and rail.

[0031] This patent provides a new type of steel wheel tracked dual-purpose road and rail chassis, which can also be used as the chassis of railway engineering vehicles such as overhead line maintenance vehicles and bridge inspection vehicles, and can ensure the stability, safety and adaptability to multiple working conditions of engineering vehicles.

[0032] This patent provides a new type of steel wheel crawler dual-purpose chassis for road and rail, which is a special chassis for rail engineering vehicles. When the retractable crawler chassis or steel wheel device is in working condition, it refers to the supporting role of the retractable crawler chassis or steel wheel device on the whole vehicle when the working device or actuator above the working platform is working, and also refers to the retractable crawler chassis driving on the ground of ballastless track bed plate, ballasted track bed surface, base bed surface pit, or the steel wheel driving on the rail.

[0033] The above is only a preferred implementation of this patent. It should be pointed out that for technicians in this field, several modifications and improvements can be made without departing from the structure of this patent, which will not affect the effect of the implementation of the invention and the practicality of the patent.

Claims

1. A new type of steel wheel crawler type dual-purpose road and rail chassis, characterized by: The invention mainly comprises a retractable crawler chassis (1), a steel wheel device (2), and a slewing platform (3); the retractable crawler chassis (1) mainly comprises a chassis center frame (11), a crawler assembly (12), a telescopic arm (13), a telescopic oil cylinder (14), and a connecting frame (15); the crawler assembly (12) installed on the connecting frames (15) on the left and right sides of the chassis can be adjusted in spacing by means of the telescopic oil cylinder (14) to meet the requirements of the whole machine running in the surface pit (6) of the ballastless track bed and the ballastless track ballast bed surface (5) and the ballasted track bed surface (7); the steel wheel device (2) mainly comprises a steel wheel (21), a steel wheel (22), and a steel wheel (23). The invention relates to a wheel drive device (22), a lifting cylinder (23), a mounting seat (24), a steel wheel frame (25) and a wheel axle. The steel wheel device (2) has two sets, which are fixedly mounted on the front and rear of the working platform (33) through the mounting seat (24) and are used for running on the track surface after the steel rail (4) is laid. The revolving platform (3) is installed above the chassis center frame (11). The working platform (33) can carry a driver's cab, a hydraulic system, an electrical system and different track construction work devices. Through the rotation of the revolving platform (3), the orientation of the retractable crawler chassis (1) and the steel wheel device (2) can be adjusted to meet the needs of the upper and lower tracks.

2. A new type of steel wheel tracked dual-purpose road and rail chassis as claimed in claim 1, characterized in that: The telescopic crawler chassis (1) comprises two telescopic cylinders (14) which are fixedly mounted in parallel at the bottom of a chassis center frame (11). The two telescopic cylinders (14) are mounted in opposite directions and telescope toward the left and right sides. The piston rod ends of the telescopic cylinders (14) are respectively fixedly connected to the left and right connecting frames (15), and the connecting frames (15) are mounted on the crawler assemblies (12). Four telescopic arms (13) are mounted inside the chassis center frame (11). The outer ends of the first and third telescopic arms (13) and the second and fourth telescopic arms (13) are respectively fixedly connected to the left and right connecting frames (15). When the telescopic cylinders (14) are extended, the connecting frames (15) are pushed to translate outward, and at the same time, the telescopic arms (13) mounted inside the chassis center frame (11) are extended, thereby adjusting the spacing between the two crawler assemblies (12) and maintaining the stability of the chassis.

3. A new type of steel wheel tracked dual-purpose road and rail chassis as claimed in claim 1, characterized in that: The two sets of steel wheel devices (2) are fixedly mounted on the front and rear of the working platform (33) via a mounting seat (24); the two ends of the lifting cylinder (23) are respectively connected to the mounting seat (24) and the steel wheel frame (25) via a pin hinge; the steel wheel drive device (22) is mounted on the steel wheel frame (25); the piston rod of the lifting cylinder (23) is extended to drive the steel wheel frame (25) to rotate and descend, so that the steel wheel (21) falls on the steel rail (4), and the retractable crawler chassis (1) is suspended in the air, so that the steel wheel (21) can be guided and driven on the steel rail (4); the piston rod of the lifting cylinder (23) is retracted, and the steel wheel (21) is suspended in the air, and the retractable crawler chassis (1) is in contact with the ballastless track bed plate (5), the surface of the ballasted track bed (7) or the road surface, and is in a working state.

4. A new type of steel wheel tracked dual-purpose road and rail chassis as claimed in claim 1, characterized in that: The slewing platform (3) mainly comprises a driving motor, a housing, a worm (31), a slewing bearing (32) and a working platform (33); the inner ring of the slewing bearing (32) is toothless and serves as a fixed ring, and the inner ring is connected to the chassis center frame by bolts; the outer ring of the slewing bearing (32) has teeth and serves as a rotating ring meshing with the worm (31), and the outer ring is connected to the working platform (33) by bolts; the driving motor drives the worm (31) to rotate, so that the outer ring of the slewing bearing (32) rotates, thereby rotating the working platform (33).

5. A new type of steel wheel tracked dual-purpose road and rail chassis as claimed in claim 1, characterized in that: The maximum telescopic amount of the telescopic oil cylinder (14) is 750 mm. When the telescopic crawler chassis (1) is in the working state, by adjusting the telescopic amount of the piston rod of the telescopic oil cylinder (14), the vehicle can travel and operate on a CRTSⅠ or CRTSⅡ ballastless track slab (5) without rails, or on a ballasted track surface (7). When the piston rod is fully retracted, the outer spacing between the two crawler assemblies (12) is a minimum of 1650 mm, meeting the size requirements for travel and operation in a bed surface pit (6) between two ballastless track double lines.

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