CN115257262A - Tire type highway-railway dual-purpose excavator walking system and excavator - Google Patents
Tire type highway-railway dual-purpose excavator walking system and excavator Download PDFInfo
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- CN115257262A CN115257262A CN202210935336.1A CN202210935336A CN115257262A CN 115257262 A CN115257262 A CN 115257262A CN 202210935336 A CN202210935336 A CN 202210935336A CN 115257262 A CN115257262 A CN 115257262A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60F—VEHICLES FOR USE BOTH ON RAIL AND ON ROAD; AMPHIBIOUS OR LIKE VEHICLES; CONVERTIBLE VEHICLES
- B60F1/00—Vehicles for use both on rail and on road; Conversions therefor
- B60F1/04—Vehicles for use both on rail and on road; Conversions therefor with rail and road wheels on different axles
- B60F1/043—Vehicles comprising own propelling units
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Abstract
The invention discloses a traveling system of a tire type highway-railway dual-purpose excavator and the excavator, wherein the traveling system comprises a mounting seat, a traveling bracket, a traveling device and a mode switching device; the mounting seat is mounted and connected with the walking bracket; the mode switching device is connected with the mounting seat and the walking bracket and used for switching a highway mode and a railway mode of the excavator; the walking device is connected with the walking bracket and comprises a supporting structure, a driving shaft and a walking guide wheel, the driving shaft is connected with the supporting structure and is vertically connected with the center of the end surface of the walking guide wheel, and the mode switching device controls the walking guide wheel to be suspended in the air and drives the excavator to walk by the contact friction between tires on the excavator and the ground in a highway mode; in the railway mode, the mode switching device controls the traveling guide wheel to be in contact with the rail, controls the driving shaft to be in contact with the tire on the excavator, and drives the excavator to travel by the contact friction between the tire on the excavator and the driving shaft. The invention can effectively reduce the product cost and automatically adjust the height of the running guide wheels at two sides of the vehicle.
Description
Technical Field
The invention relates to a tire type highway-railway dual-purpose excavator traveling system and an excavator, and belongs to the technical field of engineering machinery.
Background
Along with the continuous improvement of the running quantity and the running speed of the railway, the requirements on the time of railway maintenance and the working efficiency are continuously improved, and after the special walking system and the working device are installed, the highway and railway dual-purpose excavator applied to a railway system can not only complete the work of a common excavator, but also walk on a rail to complete the work of excavation, sleeper changing, rail changing, ballast pushing and the like required on the railway along the road. Compared with a crawler-type highway and railway dual-purpose excavator, the tire-type highway and railway dual-purpose excavator has the advantages of high walking speed, no damage to a road surface and capability of automatically transferring in a long distance.
The existing tire type highway-railway dual-purpose excavator is characterized in that guide structures which are adjusted by a hydraulic oil cylinder in a lifting mode are arranged on the front portion and the rear portion of an excavator frame respectively, walking guide wheels are mounted at the left end and the right end of each guide structure, and a hydraulic motor and a hydraulic system are mounted at the walking guide wheels. When the excavator is in a railway mode, the lifting oil cylinder works to enable the walking guide wheel to be placed on the rail, and the walking guide wheel is driven by the hydraulic motor, so that the excavator runs on the rail.
However, the conventional tire-type highway-railway dual-purpose excavator is two independent sets of driving systems and braking systems in a highway mode and a railway mode, the operation in the highway mode is the same as that of the common tire-type excavator, a power path of a hydraulic motor-gearbox-transmission shaft-drive axle-tire is used, in the railway mode, the tire is suspended and a walking guide wheel is attached to a rail, and the power path of the hydraulic motor-walking guide wheel is used. The excavator fails to utilize the power system in the highway mode in the railway mode and the additional hydraulic motor and its hydraulic system are costly. Meanwhile, when the excavator is in a railway mode, the height of the hydraulic motors on two sides of the guide structure of the excavator is constant and is the initial installation height, and suspension adjustment is not performed.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a tire type highway-railway dual-purpose excavator traveling system and an excavator.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a travelling system of a tire type highway-railway excavator, comprising: the device comprises a mounting seat, a walking bracket, a walking device and a mode switching device;
the mounting seat is mounted on the excavator frame and connected with the walking bracket;
the mode switching device is connected with the mounting seat and the walking bracket and used for switching a road mode and a railway mode of the excavator;
the walking device is connected with the walking bracket and comprises a supporting structure, a driving shaft and a walking guide wheel, the driving shaft is connected with the supporting structure and is vertically connected with the center of the end surface of the walking guide wheel, and in a highway mode, the mode switching device controls the walking guide wheel to be suspended in the air and drives the excavator to walk by the contact friction between tires on the excavator and the ground; in the railway mode, the mode switching device controls the traveling guide wheel to be in contact with a rail, controls the driving shaft to be in contact with the tire on the excavator, and drives the excavator to travel by the contact friction between the tire on the excavator and the driving shaft.
Optionally, the mode switching device includes: and the lifting oil cylinder is used for switching a road mode and a railway mode of the excavator by adjusting and controlling the height of the walking guide wheel.
Optionally, the walking system of the tire type highway-railway dual-purpose excavator further comprises a swing shaft, and the swing shaft is fixedly connected with the walking bracket; the swing shaft is rotatably connected with the walking device and used for realizing the swinging of the walking device around the swing shaft relative to the walking bracket within a certain angle range.
Optionally, a bearing is arranged between the swing shaft and the walking device, and the excircle of the bearing is in tight fit with the inner hole of the shaft sleeve in the walking device; the inner hole of the bearing is in clearance fit with the outer circle of the swing shaft; the oscillating shaft is provided with 2 round holes which are mutually perpendicular and communicated, wherein the round holes which are coaxial with the oscillating shaft are threaded holes for mounting oil nozzles.
Optionally, the tire type highway-railway dual-purpose excavator traveling system further comprises a suspension cylinder in a railway mode, the suspension cylinder is mounted on a cylinder mounting seat on the traveling support, and a piston rod of the suspension cylinder is in contact with a cylinder base on the traveling device, so that when the excavator travels on rails with different heights, the heights of the traveling guide wheels on two sides are automatically adjusted.
Optionally, the traveling system of the tire type highway-railway dual-purpose excavator further comprises a three-way joint, one end of the three-way joint is communicated with the oil path of the suspension oil cylinder, and the other end of the three-way joint is used for being communicated with the oil path of the drive axle suspension oil cylinder on the excavator, so that the excavator shares a set of suspension hydraulic oil path in the railway mode and the highway mode.
Optionally, the support structure comprises a frame, an axle tube, an axle sleeve, two axles and two oil cylinder bases;
the shaft tube is arranged in the frame and connected with the frame, and mounting holes are formed in the middle parts of the shaft tube and the frame;
the shaft sleeve penetrates through the mounting hole and then is respectively connected with the frame and the shaft tube;
the first ends of the two shafts are respectively fixedly connected with the two ends of the shaft tube;
the walking guide wheels are respectively arranged on the second ends of the corresponding shafts through a pair of bearings and are axially positioned through positioning pieces; lubricating grease is injected into the traveling guide wheel and is respectively sealed through a first sealing element and a second sealing element, and the first sealing element and the second sealing element are symmetrically arranged on two sides of the traveling guide wheel;
the driving shaft is used for installing the second sealing element and the walking guide wheel together through interference fit;
the two oil cylinder bases are respectively positioned at the two ends of the frame.
Optionally, the first sealing element comprises a lip-shaped sealing ring and an end cover, and the lip-shaped sealing ring is mounted on the walking guide wheel through the end cover and a screw; the second sealing element comprises an O-shaped ring and a flange, and the O-shaped ring is arranged on the walking guide wheel through the flange and a screw; the flange is processed with the hole, and the one end of drive shaft is processed with the smooth shaft section, installs the drive shaft together with the flange through interference fit.
Optionally, the connection mode of the driving shaft and the flange is an interference fit coupling, a spline coupling, a bolt coupling or an integrated structural design with a T-shaped cross section.
Optionally, the walking bracket is provided with an upper hinge point and a lower hinge point, and the upper hinge point and the lower hinge point are respectively arranged in two groups and are arranged on the walking bracket in a bilateral symmetry manner; the upper hinge point is connected with the lower hinge point of the mounting seat through a pin shaft, and the lower hinge point is connected with the mode switching device through a pin shaft; the middle part of the walking bracket is provided with a pin shaft mounting hole and a pin shaft fixing hole which are used for mounting and fixing the swing shaft; and mounting holes of the oil cylinder mounting seats are symmetrically formed in the two ends of the walking bracket, and the oil cylinder mounting seats are mounted at the two ends of the walking bracket.
Alternatively, the drive shaft may be of a unitary shaft construction or a construction in which the inner hub is matingly connected to the outer hub.
Optionally, the outer surface of the driving shaft is provided with convex points or straight teeth, helical teeth, or striations in the shape of helical teeth, which can increase friction.
In a second aspect, the present invention provides an excavator comprising: the wheeled combined road and railway excavator walking system of any one of the first aspect.
Compared with the prior art, the invention has the following beneficial effects:
the invention shares a set of driving system and braking system under railway mode and road mode, and can control the running speed of the vehicle by accelerator pedal and brake pedal no matter in road mode through friction walking between the tire and the ground or in railway mode through friction walking between the tire and the driving shaft at the position of the running guide wheel, without arranging additional driving device and braking device, thereby effectively reducing the cost.
Meanwhile, the hydraulic suspension device in a railway mode is further arranged in the traveling system, so that the height of the traveling guide wheels on two sides can be automatically adjusted when the excavator travels on rails with different heights, and the balance of the whole excavator is kept. And the excavator shares a path of hydraulic oil and pressure maintaining valve block under the railway mode and the highway mode, no additional hydraulic and control element is needed, and the cost is further reduced.
Drawings
FIG. 1 is a front view of a wheeled highway-railway excavator walking system in a railway mode according to one embodiment of the present invention;
FIG. 2 is a side view of a wheeled highway-railway excavator walking system in a railway mode in accordance with one embodiment of the present invention;
FIG. 3 is a top view of a wheeled highway-railway excavator walking system in a highway mode in accordance with one embodiment of the present invention;
FIG. 4 is a side view of a wheeled highway-railway excavator walking system in a highway mode in accordance with one embodiment of the present invention;
FIG. 5 is a front view of a mount in one embodiment of the invention;
FIG. 6 is a side view of a mount in one embodiment of the invention;
FIG. 7 is a front view of a walking carriage in one embodiment of the present invention;
FIG. 8 is a side view of a walking carriage in one embodiment of the present invention;
FIG. 9 is a cross-sectional view of a walking device in an embodiment of the present invention;
FIG. 10 is a top view of a walking device in an embodiment of the present invention;
FIG. 11 is a schematic view of the structure of the swing shaft in one embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present patent application, it is noted that the terms "upper", "lower", "left", "right", "horizontal", and the like refer to orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are used only for convenience in describing the present patent application and for simplicity in description, but do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present patent application.
In the description of the present patent application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Example 1
In an embodiment of the present invention, a traveling system of a tire type highway-railway excavator is provided, including: the device comprises a mounting seat 5-1, a walking bracket 5-2, a walking device 5-3 and a mode switching device 5-5;
the mounting seat 5-1 is mounted on an excavator frame 5-10 and connected with the walking bracket 5-2;
the mode switching device 5-5 is connected with the mounting seat 5-1 and the walking bracket 5-2 and is used for switching a road mode and a railway mode of the excavator; in a specific implementation process, the mode switching device 5-5 includes: the lifting oil cylinder is used for switching a highway mode and a railway mode of the excavator by adjusting and controlling the heights of the walking guide wheels 3-8;
the traveling device 5-3 is connected with the traveling support 5-2 and comprises a supporting structure, a driving shaft 3-13 and a traveling guide wheel 3-8, the driving shaft 3-13 is connected with the supporting structure and is vertically connected with the center of the end face of the traveling guide wheel 3-8, and in a highway mode, the traveling guide wheel 3-8 is controlled to be suspended by the mode switching device 5-5 and is driven to travel by the contact friction between a tire 5-9 on the excavator and the ground; in the railway mode, the mode switching device 5-5 controls the traveling guide wheel 3-8 to be in contact with a rail, controls the driving shaft 3-13 to be in contact with the tire 5-9 on the excavator, and generates contact friction between the tire 5-9 on the excavator and the driving shaft 3-13 to drive the excavator to travel.
In summary, the tire type road-railway excavator walking system in the embodiment of the invention utilizes the friction between the tire and the ground to walk in the road mode. In the railway mode, the driving shaft at the position of the running guide wheel is rubbed by the tire to run. In the two modes, the running speed of the excavator can be controlled by an accelerator pedal and a brake pedal without arranging an additional driving device and a braking device, so that the cost is effectively reduced.
In a specific implementation manner of the embodiment of the present invention, the mounting seat 5-1 is fixed on the excavator frame 5-10, and the two may be welded or fixedly connected with each other. The lifting mechanism comprises an installation seat 5-1, and is characterized in that an upper hinge point 1-1 and a lower hinge point 1-2 are arranged on the installation seat 5-1, the upper hinge point 1-1 is used for being connected with a mode switching device 5-5 (a lifting oil cylinder) through a pin shaft, and the lower hinge point 1-2 is used for being connected with a walking support 5-2 through a pin shaft. In a specific implementation process, the walking system in the embodiment of the invention comprises two sets of mounting seats and two sets of mode switching devices (lifting oil cylinders), the number of the mounting seats can be adjusted according to the bearing requirements, and the specific structural schematic diagrams of the mounting seats are shown in fig. 5 and 6.
In a specific implementation manner of the embodiment of the invention, the walking bracket 5-2 is provided with an upper hinge point 2-1 and a lower hinge point 2-2, and the upper hinge point 2-1 and the lower hinge point 2-2 are respectively arranged in two groups and are arranged on the walking bracket 5-2 in a left-right symmetrical manner; the upper hinge point 2-1 is connected with a lower hinge point 1-2 of the mounting base 5-1 through a pin shaft, and the lower hinge point 2-2 is connected with the mode switching device 5-5 through a pin shaft; the middle part of the walking bracket 5-2 is provided with a pin shaft mounting hole 2-3 and a pin shaft fixing hole 2-6 for mounting and fixing the swing shaft 4-2; mounting holes of the oil cylinder mounting bases 2-5 are symmetrically formed in two ends of the walking support 5-2 and used for mounting the oil cylinder mounting bases 2-5 at two ends of the walking support 5-2, and the structural diagram of the walking support 5-2 is specifically shown in fig. 7 and 8.
In a specific implementation manner of the embodiment of the invention, the middle part of the walking device 5-3 is a welding structure of the frame 3-1 and the axle tube 3-3, and the two ends are an assembly structure of the walking guide wheels 3-8 and the driving shaft 3-13; as shown in fig. 9 and 10, in particular, the supporting structure includes a frame 3-1, a shaft tube 3-3, a shaft sleeve 3-4, two shafts 3-5 and two cylinder bases 3-2;
the shaft tube 3-3 is arranged in the frame 3-1 and connected with the frame 3-1, the frame 3-1 and the shaft tube 3-3 can be connected by welding in the specific implementation process, the middle parts of the frame 3-1 and the shaft tube 3-3 are both provided with mounting holes, and the mounting holes can be round holes in the specific implementation process;
the shaft sleeve 3-4 penetrates through the mounting hole and then is respectively connected with the frame 3-1 and the shaft tube 3-3, and in the specific implementation process, the shaft sleeve 3-4, the frame 3-1 and the shaft tube 3-3 can be welded;
the first ends of the two shafts 3-5 are respectively fixedly connected with the two ends of the shaft tube 3-3;
the traveling guide wheels 3-8 are respectively installed on the second ends of the corresponding shafts 3-5 through a pair of bearings 3-9 and are axially positioned through positioning pieces; lubricating grease is injected into the traveling guide wheels 3 to 8 and is respectively sealed through first sealing elements and second sealing elements, and the first sealing elements and the second sealing elements are symmetrically arranged on two sides of the traveling guide wheels 3 to 8;
the driving shaft 3-13 is arranged together with the second sealing element and the walking guide wheel 3-8 through interference fit;
the two oil cylinder bases 3-2 are respectively positioned at two ends of the frame 3-1, in the specific implementation process, the oil cylinder bases 3-2 can be welded on the frame 3-1, threaded holes can also be formed in the frame 3-1, through holes are formed in the oil cylinder bases 3-2, and the oil cylinder bases 3-2 are installed on the frame 3-1 through screws;
preferably, the first sealing element comprises a lip-shaped sealing ring 3-7 and an end cover 3-6, and the lip-shaped sealing ring 3-7 is installed on the walking guide wheel 3-8 through the end cover 3-6 and a screw; the second sealing element comprises O-shaped rings 3-14 and flanges 3-12, and the O-shaped rings 3-14 are arranged on the traveling guide wheels 3-8 through the flanges 3-12 and screws; the flange 3-12 is provided with an inner hole, the driving shaft 3-13 is provided with a smooth shaft section, and the driving shaft 3-13 and the flange 3-12 are arranged together in an interference fit mode. The driving shaft 3-13 and the flange 3-12 can be connected and fixed and transmit torque by means of spline coupling and bolt coupling. Similarly, the drive shaft 3-13 and the flange 3-12 may be provided as a one-piece part having a T-shaped cross-section.
In a specific implementation manner of the embodiment of the present invention, the driving shafts 3-13 may be an integrated shaft structure, and the outer surface thereof is provided with convex points or stripes in the shape of straight teeth, helical teeth, etc. which can increase the friction force. In another specific implementation manner of the embodiment of the present invention, the driving shaft 3-13 may adopt a structure in which an inner shaft core and an outer shaft sleeve are cooperatively connected to facilitate replacement of the shaft sleeve, and the outer surface of the driving shaft 3-13 is provided with convex points or straight teeth, helical teeth, and helical teeth shaped stripes capable of increasing friction force.
In a specific implementation manner of the embodiment of the invention, the traveling system of the tire-type highway-railway dual-purpose excavator further comprises a swing shaft 4-2, as shown in fig. 11, the swing shaft 4-2 is fixedly connected with the traveling bracket 5-2; the swing shaft 4-2 is rotationally connected with the walking device 5-3 to realize the swinging of the walking device around the swing shaft 4-2 relative to the walking bracket 5-2 within a certain angle range;
a bearing 4-1 is arranged between the swing shaft 4-2 and the walking device 4-3, and the excircle of the bearing 4-11 is tightly matched with the inner hole of the shaft sleeve 3-4 in the walking device; the inner hole of the bearing 4-11 is in clearance fit with the outer circle of the swing shaft 4-2; the swing shaft 4-2 is provided with 2 round holes which are mutually perpendicular and communicated, wherein the round holes which are coaxial with the swing shaft 4-2 are threaded holes for mounting the oil nozzle 4-3. Relative to the walking bracket 5-2, the walking device 5-3 can swing left and right within a certain angle range around the swing shaft 4-2. Grease injected from the oil nozzle 4-3 can fill the gap between the inner hole of the bearing 4-1 and the excircle of the rocking shaft 4-2, so as to play a role in lubrication.
In a specific implementation manner of the embodiment of the invention, the traveling system of the tire type highway-railway dual-purpose excavator further comprises a suspension oil cylinder 5-6 in a railway mode, the suspension oil cylinder 5-6 is installed on an oil cylinder installation seat 2-5 on the traveling support 5-2, and a piston rod of the suspension oil cylinder 5-6 is in contact with an oil cylinder base 3-2 on the traveling device 5-3, so that when the excavator travels on rails with different heights, the heights of the traveling guide wheels on two sides are automatically adjusted, and the balance of the whole excavator is kept;
the traveling system of the tire type highway and railway dual-purpose excavator further comprises a three-way joint 5-7, one end of the three-way joint 5-7 is communicated with an oil way of the suspension oil cylinder 5-6, the other end of the three-way joint is used for being communicated with an oil way of a drive axle suspension oil cylinder 5-4 on the excavator, the oil way 5-6 of the suspension oil cylinder in the railway mode is communicated with an oil way of the suspension oil cylinder 5-4 in the highway mode, and the excavator can share one set of suspension hydraulic oil way in the railway mode and the highway mode without additional hydraulic pressure and control elements.
In a specific implementation manner of the embodiment of the invention, the tire type highway-railway dual-purpose excavator traveling system further comprises a pressure maintaining valve block 5-8 (the pressure maintaining valve block 5-8 is a part of the excavator in the prior art), and the pressure maintaining valve block 5-8 is connected with the three-way joint 5-7 and used for regulating and controlling the hydraulic pressure of the suspension hydraulic oil circuit in a railway mode and a highway mode.
The following describes the tire type highway-railway excavator walking system in the embodiment of the present invention in detail with reference to a specific embodiment.
Fig. 1 and 2 are schematic diagrams of the tire type combined road and railway excavator walking system in a railway mode, and fig. 3 and 4 are schematic diagrams of the tire type combined road and railway excavator walking system in a road mode, including: the device comprises a mounting base 5-1, a walking bracket 5-2, a walking device 5-3, a swing shaft 4-2, a lifting oil cylinder 5-5, a suspension oil cylinder 5-6 in a railway mode, a walking guide wheel 3-8, a driving shaft 3-13, tires 5-9, an excavator frame 5-10, a driving axle 5-11, a suspension oil cylinder 5-4 in a highway mode, a three-way joint 5-7 and a pressure maintaining valve block 5-8. The mounting seat 5-1 is mounted on the excavator frame 5-10 and connected with the walking bracket 5-2; the lifting oil cylinder 5-5 switches a road mode and a railway mode of the excavator by adjusting and controlling the height of the walking guide wheel 3-8; the traveling device 5-3 is connected with the traveling support 5-2 and comprises a driving shaft 3-13, tires 5-9 and traveling guide wheels 3-8, the driving shaft 3-13 is vertically connected with the center of the end face of the traveling guide wheel 3-8, the traveling guide wheels 3-8 are suspended in the air in a highway mode, the tires 5-9 are in contact friction with the ground to drive the excavator to travel, the traveling guide wheels 3-8 are in contact with rails in a railway mode, and the tires 5-9 are in contact friction with the driving shaft 3-13 to drive the excavator to travel.
As shown in figures 5 and 6, the mounting base is welded on a frame 5-10 of the excavator, an upper hinge point 1-1 arranged on the mounting base is connected with a lifting oil cylinder 5-5 through a pin shaft, and a lower hinge point 1-2 is connected with a walking bracket 5-2 through a pin shaft. The traveling system of the tire type highway-railway dual-purpose excavator comprises two groups of bases and two sets of lifting cylinders, and the number of the traveling systems can be adjusted according to bearing requirements.
As shown in fig. 7 and 8, the walking bracket is provided with an upper hinge point 2-1 and a lower hinge point 2-2, and each hinge point has two groups which are symmetrically arranged on the walking bracket. The upper hinge point 2-1 is connected with the lower hinge point 1-2 of the mounting seat through a pin shaft, and the lower hinge point 2-2 is connected with the lifting oil cylinder through a pin shaft. The middle part of the walking bracket is provided with a pin shaft mounting hole 2-3 and a pin shaft fixing hole 2-6 for mounting and fixing a swinging pin shaft, the two ends of the walking bracket are symmetrically provided with mounting holes of oil cylinder mounting seats 2-5, and a pair of oil cylinder mounting seats 2-5 are mounted at the two ends of the walking bracket through bolts 2-6. Similarly, the cylinder mounting seats 2-5 may also be arranged to be welded to the travelling carriage.
As shown in fig. 9 and 10, the middle part of the walking device is a welding structure of the frame 3-1 and the axle tube 3-3, and the two ends are an assembly structure of the walking guide wheel and the driving axle. The middle parts of the frame 3-1 and the shaft tube 3-3 are both provided with round holes, and the shaft sleeve 3-4 penetrates through the round holes and is welded with the frame 3-1 and the shaft tube 3-3 together. The two ends of the shaft tube 3-3 are provided with inner circular holes, the two shafts 3-5 are respectively matched and welded with the inner circular holes at the two ends of the shaft tube 3-3, and the other ends of the shafts 3-5 are respectively provided with an oil seal mounting position, a bearing mounting position, a tool withdrawal groove and a thread.
The traveling guide wheels 3-8 at the two ends are respectively arranged on the shafts 3-5 through a pair of bearings 3-9 and are axially positioned through round nuts 3-10 and locking washers 3-11. Lubricating grease is injected into the guide wheel and is respectively sealed through a sealing ring 3-7 and an O-shaped ring 3-14, the sealing ring 3-7 is installed on the walking guide wheel 3-8 through a small end cover 3-6 and a screw, and the O-shaped ring 3-14 is installed on the walking guide wheel 3-8 through a flange 3-12 and a screw.
The flange 3-12 is provided with an inner hole, the driving shaft 3-13 is provided with a smooth shaft section, and the driving shaft 3-13 and the flange 3-12 are arranged together in an interference fit mode. Similarly, the driving shaft 3-13 and the flange 3-12 can be connected and fixed and transmit torque by a spline coupling or a bolt coupling, and can also be arranged into an integrated part with a T-shaped section.
The drive shafts 3-13 may be provided as an integral shaft, the outer surface of which is provided with raised points or striations in the shape of straight, helical or spiral teeth, etc., which increase the friction. The inner shaft core and the outer shaft sleeve can be arranged to facilitate the replacement of the shaft sleeve, and the outer surface of the shaft sleeve is provided with convex points or stripes in the shapes of straight teeth, helical teeth, spiral teeth and the like which can increase friction force.
The two oil cylinder bases 3-2 are positioned at two ends of the frame 3-1, the oil cylinder bases 3-2 can be welded on the frame 3-1, threaded holes can also be arranged on the frame 3-1, through holes are arranged on the oil cylinder bases 3-2, and the oil cylinder bases 3-2 are arranged on the frame 3-1 through screws.
As shown in fig. 7, 8, 9 and 10, a pair of suspension cylinders in railway mode are mounted on cylinder mounting seats 2-4 on a walking bracket, and cylinder piston rods are in contact with cylinder bases 3-4 on a walking device. By additionally arranging the three-way joints 5-7, the oil paths of the suspension oil cylinders 5-6 in the railway mode are communicated with the oil paths 5-4 of the suspension oil cylinders in the highway mode, so that the excavator shares a set of suspension hydraulic oil paths in the highway mode and the railway mode.
As shown in figure 11, the swing shaft 4-2 is connected with the walking bracket 4-1 and the walking device 4-3, and the swing shaft 4-2 and the walking bracket 4-1 are fixed through bolts. A bearing 4-1 is arranged between the middle section of the swing shaft 4-2 and a shaft sleeve 3-7 in the walking device 4-3, the outer circle of the bearing 4-1 is tightly matched with the inner hole of the shaft sleeve 3-7, and the inner hole of the bearing 4-1 is in clearance fit with the outer circle of the swing shaft 4-2. The swing shaft 4-2 is provided with 2 round holes which are mutually vertical and communicated, and the hole which is coaxial with the swing shaft 4-2 is a threaded hole for installing a grease nipple 4-3.
Relative to the walking bracket, the walking device 5-3 can swing left and right within a certain angle range around the swing shaft 4-2. Grease injected from the grease nipple 4-3 can fill the gap between the inner hole of the bearing 4-1 and the excircle of the rocking shaft 4-2, so as to play a role in lubrication.
Example 2
The embodiment of the invention provides an excavator, which comprises the tire type highway-railway dual-purpose excavator walking system in the embodiment 1.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (13)
1. The utility model provides a dual-purpose excavator traveling system of wheeled highway railway which characterized in that includes: the device comprises a mounting seat, a walking bracket, a walking device and a mode switching device;
the mounting seat is mounted on the excavator frame and connected with the walking bracket;
the mode switching device is connected with the mounting seat and the walking bracket and used for switching a highway mode and a railway mode of the excavator;
the traveling device is connected with the traveling bracket and comprises a supporting structure, a driving shaft and a traveling guide wheel, the driving shaft is connected with the supporting structure and is vertically connected with the center of the end face of the traveling guide wheel, and in a highway mode, the mode switching device controls the traveling guide wheel to be suspended in the air and drives the excavator to travel by the contact friction between tires on the excavator and the ground; in the railway mode, the mode switching device controls the traveling guide wheel to be in contact with the rail, controls the driving shaft to be in contact with the tire on the excavator, and drives the excavator to travel by generating contact friction between the tire on the excavator and the driving shaft.
2. The traveling system of a tire type road-railway excavator according to claim 1, wherein the mode switching device comprises: and the lifting oil cylinder is used for switching a road mode and a railway mode of the excavator by adjusting and controlling the height of the walking guide wheel.
3. The traveling system of the tire type road-railway excavator according to claim 1, wherein the traveling system of the tire type road-railway excavator further comprises a swing shaft, and the swing shaft is fixedly connected with the traveling bracket; the swing shaft is rotatably connected with the walking device and used for realizing the swinging of the walking device around the swing shaft relative to the walking bracket within a certain angle range.
4. The traveling system of the tire type road-railway excavator as claimed in claim 3, wherein a bearing is arranged between the swing shaft and the traveling device, and the outer circle of the bearing is in tight fit with the inner hole of the shaft sleeve in the traveling device; the inner hole of the bearing is in clearance fit with the outer circle of the swing shaft; the swing shaft is provided with 2 round holes which are vertically communicated with each other, wherein the round holes which are coaxial with the swing shaft are threaded holes for mounting oil nozzles.
5. The traveling system of the tire-type highway-railway excavator as claimed in claim 3 or 4, further comprising a suspension cylinder in a railway mode, wherein the suspension cylinder is mounted on a cylinder mounting seat on the traveling support, and a piston rod of the suspension cylinder is in contact with a cylinder base on the traveling device, so as to automatically adjust the height of the traveling guide wheels on two sides when the excavator travels on rails with different heights.
6. The traveling system of the tire type road-railway excavator as claimed in claim 5, wherein the traveling system of the tire type road-railway excavator further comprises a three-way joint, one end of the three-way joint is communicated with the oil path of the suspension oil cylinder, and the other end of the three-way joint is used for being communicated with the oil path of the drive axle suspension oil cylinder on the excavator, so that the excavator can share one set of suspension hydraulic oil path in the railway mode and the highway mode.
7. The travelling system of the wheeled highway-railway excavator as claimed in claim 1, wherein the support structure comprises a frame, a shaft tube, a shaft sleeve, two shafts and two cylinder bases;
the shaft tube is arranged in the frame and connected with the frame, and mounting holes are formed in the middle parts of the shaft tube and the frame;
the shaft sleeve penetrates through the mounting hole and then is respectively connected with the frame and the shaft tube;
the first ends of the two shafts are respectively and fixedly connected with the two ends of the shaft tube;
the walking guide wheels are respectively arranged on the second ends of the corresponding shafts through a pair of bearings and are axially positioned through positioning pieces; lubricating grease is injected into the traveling guide wheel and is respectively sealed through a first sealing element and a second sealing element, and the first sealing element and the second sealing element are symmetrically arranged on two sides of the traveling guide wheel;
the driving shaft is used for installing the second sealing element and the walking guide wheel together through interference fit;
the two oil cylinder bases are respectively positioned at two ends of the frame.
8. The travelling system of the wheeled combined highway and railway excavator as claimed in claim 7, wherein the first sealing element comprises a lip-shaped sealing ring and an end cover, the lip-shaped sealing ring is mounted on the travelling guide wheel through the end cover and a screw; the second sealing element comprises an O-shaped ring and a flange, and the O-shaped ring is arranged on the walking guide wheel through the flange and a screw; the flange processing has the hole, and the one end processing of drive shaft has the smooth shaft section, installs drive shaft and flange together through interference fit.
9. The traveling system of a tire type road-railway excavator as claimed in claim 8, wherein the connection mode of the driving shaft and the flange is an interference fit connection, a spline connection, a bolt connection or an integrated structure design with a T-shaped section.
10. The traveling system of the tire type road-railway excavator according to claim 1, wherein the traveling support is provided with two groups of upper hinge points and two groups of lower hinge points which are arranged symmetrically left and right on the traveling support; the upper hinge point is connected with a lower hinge point of the mounting seat through a pin shaft, and the lower hinge point is connected with the mode switching device through a pin shaft; the middle part of the walking bracket is provided with a pin shaft mounting hole and a pin shaft fixing hole which are used for mounting and fixing the swing shaft; and mounting holes of the oil cylinder mounting seats are symmetrically formed in the two ends of the walking bracket, and the oil cylinder mounting seats are mounted at the two ends of the walking bracket.
11. The traveling system of a tire type road-railway excavator as claimed in claim 1, wherein the driving shaft can adopt an integral shaft structure or a structure that an inner shaft core is matched and connected with an outer shaft sleeve.
12. The traveling system of a tire type road-railway excavator according to claim 1 or 11, wherein the outer surface of the driving shaft is provided with convex points or stripes in the shape of straight teeth, helical teeth or spiral teeth which can increase friction force.
13. An excavator, comprising: the wheeled highway-railway excavator walking system of any one of claims 1-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210935336.1A CN115257262A (en) | 2022-08-05 | 2022-08-05 | Tire type highway-railway dual-purpose excavator walking system and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210935336.1A CN115257262A (en) | 2022-08-05 | 2022-08-05 | Tire type highway-railway dual-purpose excavator walking system and excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115257262A true CN115257262A (en) | 2022-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210935336.1A Pending CN115257262A (en) | 2022-08-05 | 2022-08-05 | Tire type highway-railway dual-purpose excavator walking system and excavator |
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|---|---|
| CN (1) | CN115257262A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115822028A (en) * | 2022-12-29 | 2023-03-21 | 徐州徐工挖掘机械有限公司 | Walking hydraulic system of highway-railway dual-purpose excavator and control method |
-
2022
- 2022-08-05 CN CN202210935336.1A patent/CN115257262A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115822028A (en) * | 2022-12-29 | 2023-03-21 | 徐州徐工挖掘机械有限公司 | Walking hydraulic system of highway-railway dual-purpose excavator and control method |
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