CN114312179A - Power traveling system of highway-railway dual-purpose excavator and highway-railway dual-purpose excavator - Google Patents
Power traveling system of highway-railway dual-purpose excavator and highway-railway dual-purpose excavator Download PDFInfo
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- CN114312179A CN114312179A CN202111682029.9A CN202111682029A CN114312179A CN 114312179 A CN114312179 A CN 114312179A CN 202111682029 A CN202111682029 A CN 202111682029A CN 114312179 A CN114312179 A CN 114312179A
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Abstract
The invention provides a power traveling system of a highway-railway dual-purpose excavator and the highway-railway dual-purpose excavator, wherein the power traveling system of the highway-railway dual-purpose excavator comprises a frame (10), a traveling device, a connecting frame (20), a driving axle (30) and a traveling guide wheel (40), the traveling device is installed on the frame (10), the connecting frame (20) is connected with the frame (10), the driving axle (30) is connected with the connecting frame (20), the driving axle (30) comprises a differential (31), and the traveling guide wheel (40) is connected with the driving axle (30); the highway-railway dual-purpose excavator comprises a power traveling system of the highway-railway dual-purpose excavator. The invention realizes that only one hydraulic motor is adopted to drive the excavator to run on the rail by arranging the drive axle and the walking guide wheel, thereby reducing the production cost of the highway and railway dual-purpose excavator.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a power traveling system of a highway-railway dual-purpose excavator and a highway-railway dual-purpose excavator.
Background
With the continuous improvement of the railway operation amount and the operation speed, the requirements on the railway maintenance and curing time and the working efficiency are continuously improved. The excavator for both highway and railway can be applied to a highway and a railway system, can complete the work of a common excavator, and can 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 due to the installation of a specific walking system and a specific working device.
In the related technology, the driving side of the driving type highway-railway dual-purpose excavator is provided with two walking guide wheels, a hydraulic motor is arranged at each walking guide wheel, the two sets of hydraulic motors are used for driving the walking guide wheels at the two sides simultaneously and driving the excavator to run, and the production cost and the maintenance cost of the excavator are high. And the height of the walking guide wheels on the two sides of the highway-railway dual-purpose excavator is the initial installation height, and when the excavator runs through two road sections with different rail heights, the excavator can incline to the whole excavator. In addition, the rotating speeds of the two side walking guide wheels are the same, when a vehicle passes through a curve, the inner side walking guide wheels and the outer side walking guide wheels slide due to different running distances of the two side walking guide wheels, the abrasion is aggravated, and the stability of the vehicle is poor.
It is noted that 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 constitutes prior art already known to a person skilled in the art.
Disclosure of Invention
The invention provides a power traveling system of a highway-railway dual-purpose excavator and the highway-railway dual-purpose excavator, which can reduce the production and maintenance cost of the excavator, and simultaneously ensure that the excavator can adapt to various road conditions and stably operate.
In order to achieve the above object, the present invention provides a power running system for a road-rail excavator, comprising:
a frame;
the traveling device is arranged on the frame;
the connecting frame is connected with the frame;
the drive axle is connected with the connecting frame and comprises a differential mechanism; and
and the walking guide wheel is connected with the drive axle.
In some embodiments, the power traveling system of the combined highway and railway excavator further comprises a suspension cylinder, and the suspension cylinder is respectively connected with the connecting frame and the drive axle.
In some embodiments, the highway-railway excavator power walking system further comprises a hydraulic control system for controlling the suspension cylinder, the hydraulic control system comprising a hydraulic lock for maintaining the suspension cylinder in a preset position.
In some embodiments, the power traveling system of the highway-railway dual-purpose excavator comprises two suspension oil cylinders, the hydraulic control system comprises a first control valve group and a second control valve group, the first control valve group is connected to a connecting oil path between rod cavities of the two suspension oil cylinders, and the second control valve group is connected to a connecting oil path between rodless cavities of the two suspension oil cylinders.
In some embodiments, the attachment frame includes a downwardly opening U-shaped structure with the drive axle at least partially mounted within the U-shaped structure.
In some embodiments, the power traveling system of the highway-railway dual-purpose excavator further comprises a suspension cylinder, a mounting seat for mounting the suspension cylinder is arranged on the inner wall of the U-shaped structure, and the suspension cylinder is connected with the drive axle.
In some embodiments, the power traveling system of the highway-railway dual-purpose excavator further comprises a ballast pushing plate, and the ballast pushing plate is mounted on one side, far away from the frame, of the connecting frame.
In some embodiments, a first lug plate and a second lug plate are arranged on one side of the connecting frame, which is far away from the frame, and the height of the first lug plate in the vertical direction is greater than that of the second lug plate in the vertical direction; the ballast pushing plate is rotatably connected with the second lug plate and has a working state and a non-working state; in a non-working state, the ballast pushing plate is connected with the first lug plate; and in a working state, the ballast pushing plate is disconnected with the first ear plate.
In some embodiments, the drive axle further comprises an output half shaft, the output half shaft comprises a half shaft body and a connecting portion, the half shaft body is connected between the differential and the walking guide wheel, the connecting portion is arranged at the end of the half shaft body and is integrally formed with the half shaft body, and the connecting portion is connected with the walking guide wheel.
In some embodiments, the power walking system of the combined highway and railway excavator further comprises a lifting cylinder, and the lifting cylinder is connected between the frame and the connecting frame.
In some embodiments, the power walking system of the highway-railway dual-purpose excavator further comprises a base, wherein the base is provided with a first connecting hole and a second connecting hole, and the height of the first connecting hole in the vertical direction is greater than that of the second connecting hole in the vertical direction; the connecting frame comprises an extension part, the extension part is provided with a third connecting hole and a fourth connecting hole, and the third connecting hole is arranged at a position closer to the frame than the fourth connecting hole; the lifting oil cylinder is connected with the base through a first connecting hole and connected with the connecting frame through a fourth connecting hole; the base is connected with the connecting frame through the second connecting hole and the third connecting hole.
In some embodiments, the power traveling system of the highway-railway dual-purpose excavator further comprises a swinging pin shaft, a swinging hole is formed in an axle housing of the drive axle, and a first mounting hole for mounting the swinging pin shaft is formed in the connecting frame; the swing pin shaft penetrates through the swing hole and the first mounting hole to connect the drive axle and the connecting frame, so that the drive axle swings around the central axis of the swing pin shaft.
In some embodiments, the combined highway and railway excavator power walking system further comprises a brake caliper and a brake disc; the brake caliper is fixedly connected with an axle housing of the drive axle, the brake disc is fixedly connected with the walking guide wheel, and the brake caliper is configured to clamp the brake disc to realize braking of the walking guide wheel.
In some embodiments, the brake disc is provided with a first flange portion and a second flange portion on a circumferential side surface thereof, a recessed portion is formed between the first flange portion and the second flange portion, the first flange portion is engaged with the brake caliper, and the second flange portion is fixedly connected with the traveling guide wheel.
In order to achieve the purpose, the invention also provides a highway and railway dual-purpose excavator which comprises the power traveling system of the highway and railway dual-purpose excavator.
Based on the technical scheme, the invention provides a power traveling system of a highway-railway dual-purpose excavator and the highway-railway dual-purpose excavator, wherein the excavator can simultaneously travel on a highway or a railway, and can travel by adopting a traveling device when traveling on the highway; when the excavator runs on the rail, the excavator can run by adopting a running guide wheel; in addition, the driving axle is adopted as a force transmission part to drive the walking guide wheels to move, compared with the scheme that a hydraulic motor is arranged at each walking guide wheel to realize power transmission in the related technology, the number of the hydraulic motors required in the highway-railway dual-purpose excavator can be reduced, the integral structure of a walking system is facilitated to be simplified, and the driving axle is adopted for transmission, so that the differential, braking and suspension parts are further facilitated to be arranged, the requirements on the hydraulic motors are reduced, and the manufacturing cost is further reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention.
FIG. 1 is a schematic structural diagram of some embodiments of a power walking system of a combined highway and railway excavator provided by the invention;
FIG. 2 is a schematic diagram of a base of some embodiments of a power walking system of a combined highway and railway excavator provided by the invention;
FIG. 3a is a top view of a coupling frame in some embodiments of a power traveling system for a combined highway and railway excavator according to the present invention;
FIG. 3b illustrates a front view of the attachment frame of some embodiments of the power walking system of the combined road and rail excavator provided by the present invention;
fig. 4 is a schematic structural diagram of a ballast pushing plate in some embodiments of the power walking system of the dual-purpose excavator for roads and railways provided by the invention;
FIG. 5a is a schematic structural diagram of a drive axle in some embodiments of a power walking system of a combined highway and railway excavator provided by the invention;
FIG. 5b shows a partial enlarged view of portion P of FIG. 5 a;
FIG. 6a illustrates a front view of the output half shaft of some embodiments of the power traveling system of the combined highway and railway excavator provided by the present invention;
FIG. 6b shows a right side view of the output half shaft of FIG. 6 a;
FIG. 7a is a schematic structural diagram of brake calipers in some embodiments of a power walking system of a combined highway and railway excavator provided by the invention;
FIG. 7b shows a cross-sectional view of the brake caliper of FIG. 7a taken along line A-A;
FIG. 8a is a schematic structural diagram of a brake disc in some embodiments of a power walking system of a combined highway and railway excavator provided by the invention;
FIG. 8B shows a cross-sectional view of the brake disc of FIG. 8a along line B-B;
FIG. 9 is a schematic diagram illustrating the internal structure of a U-shaped structure in some embodiments of the power traveling system of the excavator for both highway and railway provided by the invention;
FIG. 10 is a schematic diagram of a hydraulic control system for a suspension cylinder in some embodiments of a power traveling system of a combined highway and railway excavator according to the present invention;
FIG. 11 illustrates a schematic diagram of the travel control of some embodiments of the power travel system of the combined excavator provided by the present invention;
FIG. 12 illustrates a brake control schematic diagram for a power traveling system of a combined highway and railway excavator according to some embodiments of the invention.
In the figure:
10. a frame;
20. a connecting frame; 21. a U-shaped structure; 22. a mounting seat; 23. a first ear plate; 24. a second ear panel; 25. an extension portion; 26. a third connection hole; 27. a fourth connection hole; 28. a first mounting hole;
30. a drive axle; 31. a differential mechanism; 32. an output half shaft; 33. an axle housing; 321. a half shaft body; 322. a connecting portion; 34. a swing hole; 35. a brake caliper; 36. a brake disc; 361. a first flange portion; 362. a second flange portion; 37. a second mounting hole;
40. a walking guide wheel; 41. a bearing; 42. a round nut; 43. an O-shaped ring; 44. a lip-shaped seal ring;
50. suspending the oil cylinder; 51. hydraulic locking; 52. a first control valve group; 521. a first control valve; 522. a second control valve; 53. a second control valve group; 531. a third control valve; 532. a fourth control valve; 54. a slow return valve; 55. suspending an oil cylinder base;
60. pushing the ballast plate; 61. a third ear panel; 62. a fourth ear panel;
70. a lift cylinder;
80. a base; 81. a first connection hole; 82. a second connection hole;
90. swinging the pin shaft; 91. a lubricating oil hole;
100. a hydraulic motor;
110. and a brake valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the scope of the invention.
The inventor conducts a great deal of research aiming at the problem of high cost of a walking system in the related art, and finds that the reason of the high cost is mainly that the function of the combined excavator for highway and railway requires a working state with low speed and high torque, so that the related art adopts a driving scheme of a hydraulic motor and a walking guide wheel, and adopts a driving scheme of the hydraulic motor, a speed reducer, a brake and the walking guide wheel, wherein the former needs to adopt an imported low-speed hydraulic motor with a balance valve (brake valve), the motor is high in price, and the latter can adopt a common motor but has more parts, so that the production and maintenance cost is high. In addition, the excavator adopts a scheme that two sets of hydraulic motors respectively drive the walking guide wheels on two sides to move, so that the production cost and the maintenance cost are further improved.
Based on the research, the inventor provides a scheme that the driving axle is connected with the traveling guide wheel to drive the excavator to travel, so that the excavator can be driven by only one hydraulic motor, and the cost is effectively reduced.
As shown in fig. 1, in some embodiments of the power traveling system of the combined excavator of the present invention, the power traveling system includes a frame 10, a connecting frame 20, a driving axle 30 and a traveling guide wheel 40. One end of the connecting frame 20 is connected with the frame 10, the other end is connected with the driving axle 30, and the driving axle 30 is connected with the walking guide wheel 40.
Wherein, still install running gear on the frame 10, running gear is used for the dual-purpose excavator of highway and railway to walk the operating mode on the highway. The walking device can comprise a crawler belt and wheels, so long as the excavator can stably run on a road.
In the invention, the drive axle is used as a force transmission part to drive the walking guide wheels to move, compared with the scheme that a hydraulic motor is arranged at each walking guide wheel to realize power transmission in the related technology, the number of the hydraulic motors required in the highway and railway dual-purpose excavator can be reduced, the integral structure of a walking system is favorably simplified, and thus, the production and manufacturing cost is reduced; and the drive axle, the differential and the brake are matched to form a transmission structure, so that the requirement on a hydraulic motor can be reduced, and the manufacturing cost is further reduced; in addition, a suspension component can be further arranged on the drive axle so as to improve the running stability of the excavator.
The differential mechanism 31 is arranged in the drive axle 30, the walking guide wheels 40 are used for the working condition that the highway and railway dual-purpose excavator walks on the rails, when a curve is encountered, the differential mechanism 31 can automatically adjust the rotating speed of the walking guide wheels 40 on two sides according to the turning radius, so that the walking guide wheels 40 on two sides can keep a pure rolling motion state on the rails, the abrasion of the walking guide wheels 40 can be reduced, and the stability of a vehicle can be improved.
In some embodiments of the present invention, the power traveling system of the combined excavator for highway and railway further comprises a suspension cylinder 50, and the suspension cylinder 50 is connected to the connecting frame 20 and the driving axle 30 respectively.
When the excavator for highway and railway runs on rails with different heights on two sides, the height of the running guide wheel 40 on at least one side can be automatically adjusted through the suspension oil cylinder 50, so that the balance of the whole excavator is realized.
In some embodiments, the number of the suspension cylinders 50 may be two or more, so that the height of the walking guide wheels 40 on two sides can be automatically adjusted when the excavator walks on rails with different heights on two sides, thereby realizing the balance of the whole excavator.
In some embodiments, the highway-railway excavator power walking system further comprises a hydraulic control system for controlling the suspension cylinder 50, wherein the hydraulic control system enables the suspension cylinder 50 to have a self-adjusting function.
The hydraulic control system comprises a hydraulic lock 51 for keeping the suspension cylinder 50 in a preset position. By providing the hydraulic lock 51, the pressure maintaining function of the suspension cylinder 50 can be realized, so that the height of the suspension cylinder 50 is maintained at a preset position.
The hydraulic control system further comprises a first control valve group 52 and a second control valve group 53, wherein the first control valve group 52 is connected to two oil connecting paths between the rod cavities of the suspension oil cylinders 50, and the second control valve group 53 is connected to two oil connecting paths between the rodless cavities of the suspension oil cylinders 50. By opening or closing the first control valve group 52 and the second control valve group 53, the compression or jacking function of the suspension cylinders 50 on the two sides can be opened or closed, and the adaptive adjustment of the height of the suspension cylinder 50 along with the road condition is realized, so that the excavator can adapt to more operation requirements.
In some embodiments of the present invention, the connecting frame 20 includes a downwardly opening U-shaped structure 21, and the transaxle 30 is at least partially mounted inside the U-shaped structure 21. The arrangement can make full use of the connecting frame 20, so that the connecting frame 20 can be used as a supporting part of the lifting cylinder 70 (described later) and also can be used as a supporting part of the drive axle 30, and thus, a special mounting part for the drive axle 30 is not needed, so that the occupied space of the whole driving device is reduced when the excavator walks on a rail, and the compactness of the structural arrangement is improved.
As shown in fig. 1, the hydraulic motor 100 and the transaxle 30 are connected by a U-shaped structure 21 so that the power of the hydraulic motor 100 can be transmitted to the traveling guide wheels 40 through the transaxle 30.
In some embodiments of the present invention, the inner wall of the U-shaped structure 21 is provided with a mounting seat 22 for mounting a suspension cylinder 50, and the suspension cylinder 50 is connected with the driving axle 30. When the excavator for highway and railway runs on rails with different heights on two sides, the height of the suspension oil cylinder 50 is automatically adjusted, so that the heights of two ends of the drive axle 30 are changed along with the height of the suspension oil cylinder 50, and the height of the running guide wheels 40 on two sides is adjusted.
In some embodiments of the invention, the power traveling system of the dual-purpose excavator for highway and railway further comprises a ballast pushing plate 60, and the ballast pushing plate 60 is installed on one side of the connecting frame 20 away from the frame 10 and used for performing ballast pushing operation on the rail.
In some embodiments of the present invention, a side of the connecting frame 20 away from the frame 10 is provided with a first ear plate 23 and a second ear plate 24, and a height of the first ear plate 23 in the vertical direction is greater than a height of the second ear plate 24 in the vertical direction; the ballast pushing plate 60 is rotatably connected with the second ear plate 24.
The ballast pushing plate 60 has a working state and a non-working state; in a non-working state, the excavator does not perform ballast pushing operation, and the ballast pushing plate 60 is connected with the first lug plate 23, so that the ballast pushing plate is hung, and the normal running of the excavator is not influenced; in a working state, the ballast pushing plate 60 is disconnected from the first ear plate 23, so that the ballast pushing plate rotates downwards around a connection point of the ballast pushing plate and the second ear plate 24 to perform ballast pushing operation.
In some embodiments of the present invention, the drive axle 30 further includes an output axle shaft 32, the output axle shaft 32 includes an axle shaft body 321 and a connecting portion 322, the axle shaft body 321 is connected between the differential 31 and the traveling guide wheel 40, the connecting portion 322 is disposed at an end of the axle shaft body 321 and is integrally formed with the axle shaft body 321, and the connecting portion 322 is connected with the traveling guide wheel 40.
In the related art transaxle, the vehicle is usually braked by connecting the output half shaft and the hub reduction gear, and the connecting portion has a complicated structure. The inventor comprehensively considers the factors of the running speed, the motor rotating speed, the drive axle speed ratio, the size of the walking guide wheel and the like of the highway and railway dual-purpose excavator, and after analysis, calculation and practice, the proposal that the integrally formed output half shaft 32 is directly connected with the walking guide wheel 40 is provided, so that the structural strength of the output half shaft 32 and the joint of the output half shaft 32 and the walking guide wheel 40 is effectively improved, and the production cost is reduced.
In some embodiments of the present invention, the power walking system of the combined excavator and railway further comprises a lift cylinder 70, and the lift cylinder 70 is connected between the frame 10 and the connecting frame 20 to realize the lifting of the walking system.
By arranging the lifting oil cylinder 70, the driving axle 30 and the walking guide wheel 40 can be driven to move up and down, and the working condition switching of the excavator during the running on the road and the railway is realized.
In some embodiments of the present invention, the power traveling system of the combined excavator further includes a base 80, and the base 80 may be mounted on the frame 10 by welding, riveting, or the like, or the base 80 and the frame 10 may be integrally formed. Meanwhile, the number of the bases 80 can be increased or decreased according to the different loads of the excavator.
The structural configuration of the base 80 may be selected in a variety of ways.
As shown in fig. 2, the base 80 is provided with a first connection hole 81 and a second connection hole 82, and the height of the first connection hole 81 in the vertical direction is greater than the height of the second connection hole 82 in the vertical direction. As shown in fig. 3b, the attachment frame 20 includes an extension portion 25, the extension portion 25 is provided with a third attachment hole 26 and a fourth attachment hole 27, and the third attachment hole 26 is disposed at a position closer to the frame 10 than the fourth attachment hole 27. Wherein, the lift cylinder 70 is connected with the base 80 through the first connection hole 81 and is connected with the connection frame 20 through the fourth connection hole 27; the base 80 is coupled to the coupling frame 20 through the second coupling hole 82 and the third coupling hole 26.
In some embodiments of the present invention, the power traveling system of the combined excavator is further provided with a swing pin 90. As shown in fig. 9, the axle housing 33 of the drive axle 30 is provided with a swing hole 34, and the link frame 20 is provided with a first mounting hole 28 for mounting the swing pin 90. The swing pin 90 passes through the swing hole 34 and the first mounting hole 28 to connect the driving axle 30 and the connecting frame 20, so that the driving axle 30 swings around the central axis of the swing pin 90 to swing the driving axle 30, thereby realizing the height change of the walking guide wheel 40 when the excavator runs on the rails with inconsistent heights.
In some embodiments of the present invention, the power walking system of the combined excavator further includes a brake caliper 35 and a brake disc 36, the brake caliper 35 is fixedly connected to the axle housing 33 of the driving axle 30, the brake disc 36 is fixedly connected to the walking guide wheel 40, and the brake caliper 35 is configured to clamp the brake disc 36 to realize braking of the walking guide wheel 40.
Compared with the scheme that a wheel hub reduction gear is adopted for braking in the related art, the excavator braking is realized by arranging the brake caliper 35 and the brake disc 36, so that the structure of a braking part can be effectively simplified, and the production cost can be reduced.
In some embodiments of the power traveling system of the excavator for both highway and railway provided by the present invention, the circumferential side surface of the brake disc 36 is provided with a first flange portion 361 and a second flange portion 362, a concave portion is formed between the first flange portion 361 and the second flange portion 362, the first flange portion is engaged with the brake caliper 35, and the second flange portion 362 is fixedly connected with the traveling guide wheel 40.
In the related art, a brake disc in a disc brake generally has the same diameter in the axial direction, and a caliper performs braking by clamping both side surfaces of the brake disc. The inventor has conducted a detailed study on the related art, and has designed a brake disc 36 having two flange portions, which not only can achieve the function of matching the brake disc 36 with the brake caliper 35, but also can facilitate the connection between the brake disc 36 and the traveling guide wheel 40. The arrangement of the recessed portions between the flange portions can ensure a sufficiently large braking area, and at the same time, the brake disc 36 can have a smaller weight, and good heat dissipation can be achieved, so that the adverse effect of friction heat on the braking effect can be effectively reduced.
The following describes embodiments of a power traveling system of a highway-railway excavator and a highway-railway excavator provided by the invention in detail with reference to the accompanying drawings.
As shown in fig. 1, two groups of bases 80 are symmetrically welded on an excavator frame 10, a lifting cylinder 70 is respectively connected with the bases 80 and the excavator frame 10, a U-shaped structure 21 is arranged at the front end of a connecting frame 20, a swing pin shaft 90 is arranged in the middle of the U-shaped structure 21, a ballast pushing plate 60 is installed at the front end of the U-shaped structure 21, a drive axle 30 is arranged in the U-shaped structure 21, two ends of the drive axle 30 are respectively connected with a walking guide wheel 40, the drive axle 30 is connected with a hydraulic motor 100 through the connecting frame 20, and two groups of suspension cylinders 50 are symmetrically arranged on two sides of the advancing direction of the excavator.
As shown in fig. 2, the base 80 is provided with a first connection hole 81 and a second connection hole 82, and the first connection hole 81 is disposed above the second connection hole 82. As shown in fig. 3a, two sets of third connecting holes 26 and two sets of fourth connecting holes 27 are provided on the connecting frame 20, and are symmetrically arranged on the connecting frame 20.
Wherein, the base 80 and the connecting frame 20 are connected through the second connecting hole 82 and the third connecting hole 26, and the lift cylinder 70 is connected with the base 80 and the connecting frame 20 through the first connecting hole 81 and the fourth connecting hole 27, respectively.
The lifting of the power traveling system can be realized by controlling the flow of hydraulic oil in the lifting oil cylinder 70, and meanwhile, the pressure maintaining function of the hydraulic oil in the lifting oil cylinder 70 can be realized through the hydraulic valve block (namely, after the input oil path of the oil cylinder is cut off, the pressure building of the oil cylinder to a certain degree can be realized), so that the power traveling system can maintain a certain height while lifting.
As shown in fig. 3b, a first mounting hole 28 for mounting a swing pin 90 is formed in the middle of the U-shaped structure 21, two symmetrically arranged mounting seats 22 for mounting the suspension cylinder 50 are arranged on one side inside the U-shaped structure 21, two sets of ear plates for mounting the ballast pushing plate 60 are arranged on the outer side of the front end of the U-shaped structure 21, two second ear plates 24 are arranged below the U-shaped structure, and a first ear plate 23 is arranged above the U-shaped structure.
As shown in fig. 4, a third lug plate 61 is welded below the ballast pushing plate 60 and is used for being connected with the first lug plate 23, and two fourth lug plates 62 are welded above the ballast pushing plate 60 and are used for being connected with the second lug plate 24. Wherein the second and fourth ear plates 24, 62 are rotatably connected.
In some embodiments of the present invention, the second and fourth ear plates 24, 62 are pinned together.
In some embodiments of the present invention, the ballast pushing plate 60 is made of a wear-resistant material.
As shown in fig. 5b, the traveling guide wheel 40, the brake disc 36, the brake caliper 35, the lip seal 44, the O-ring 43, the round nut 42, the bearing 41, and the second mounting hole 37 for mounting the suspension cylinder base 55 are symmetrically distributed on both sides of the transaxle 30.
The traveling guide pulley 40 is mounted on the axle housing 33 through a pair of bearings 41, and is fastened and positioned by a round nut 42. The traveling guide wheel 40 is filled with grease and sealed by a lip seal 44 and an O-ring 43.
The main speed reduction part of the drive axle 30 is provided with a differential 31 and two output half shafts 32, and as shown in fig. 5b and fig. 6a, the output half shafts 32 comprise half shaft bodies 321 and connecting parts 322. The axle shaft body 321 is connected between the differential 31 and the traveling guide wheel 40, the connecting part 322 is connected to the tail end of the axle shaft body 321 and connected with the traveling guide wheel 40, and the connecting part is provided with an O-shaped ring 43 for sealing.
The brake caliper 35 is mounted on the axle housing 33 of the drive axle 30 and fixedly connected with the axle housing 33, and the brake disc 36 is mounted on the traveling guide wheel 40 and fixed through bolts. The brake caliper 35 is configured to clamp the brake disc 36 to effect excavator braking.
As shown in fig. 6b, the connecting portion 322 of the output half shaft 32 is provided with connecting holes uniformly distributed in the circumferential direction for connecting with the traveling guide wheel 40. The axle shaft body 321 and the connecting portion 322 of the output axle shaft 32 are integrally formed.
As shown in fig. 8a and 8b, the brake disk 36 is provided with a first flange portion 361 and a second flange portion 362 on the circumferential side surface thereof, a recessed portion is formed between the first flange portion 361 and the second flange portion 362, the first flange portion 361 is adapted to be engaged with the brake caliper 35, and the second flange portion 362 is provided with attachment holes evenly distributed in the circumferential direction for attachment to the traveling guide wheel 40.
As shown in fig. 9, the axle housing 33 of the drive axle 30 is provided with a swing hole 34 at the middle part, and a swing pin 90 passes through the swing hole 34 and is fixedly connected with the connecting frame 20 through the first mounting hole 28; the swing pin 90 is in clearance fit with the swing hole 34, so that the swing pin 90 can rotate in the swing hole 34, and the drive axle 30 can swing around the central axis of the swing pin 90. The swing pin shaft 90 is provided with a lubricating oil hole 91, and oil can be injected to the moving surface for lubrication through the lubricating oil hole 91, so that the drive axle 30 can rotate around the swing pin shaft 90 more smoothly, and the heat generated by friction is reduced. The suspension cylinder 50 is mounted on the mounting seat 22 of the connecting frame 20 through bolts, and a piston rod of the suspension cylinder 50 is connected with a suspension cylinder base 55 mounted on the axle housing 33.
As shown in fig. 10, the hydraulic control system for controlling the suspension cylinders 50 includes a hydraulic lock 51 for maintaining the suspension cylinders 50 at a predetermined position, and a first control valve group 52 and a second control valve group 53, the first control valve group 52 being connected to a connection oil path between the rod chambers of the two suspension cylinders 50, and the second control valve group 53 being connected to a connection oil path between the rodless chambers of the two suspension cylinders 50. Wherein the first control valve group 52 comprises a first control valve 521 and a second control valve 522, and the second control valve group 53 comprises a third control valve 531 and a fourth control valve 532.
As shown in fig. 10, the first control valve 521 is connected between the hydraulic lock 51 and the rod cavity of the left suspension cylinder 50, the second control valve 522 is connected between the hydraulic lock 51 and the rod cavity of the right suspension cylinder 50, the third control valve 531 is connected between the hydraulic lock 51 and the rod cavity of the right suspension cylinder 50, and the fourth control valve 532 is connected between the hydraulic lock 51 and the rod cavity of the left suspension cylinder 50, so that the rod cavity-free oil passages and the rod cavity oil passages of the suspension cylinders 50 on both sides of the traveling system are respectively connected in series, and the total amount of oil in the double cavities after the series connection is fixed.
By combining the hydraulic lock 51, when the total amount of oil in the rodless cavities of the suspension cylinders 50 on the two sides is fixed, the suspension cylinder 50 on the left side is compressed, and then the hydraulic oil in the suspension cylinder 50 on the left side is delivered to the suspension cylinder 50 on the right side through the serial loop of the rodless cavity of the suspension cylinder 50 on the left side-the fourth control valve 532-the third control valve 531-the rodless cavity of the suspension cylinder 50 on the right side, so that the suspension cylinder 50 on the right side is jacked and extended, and vice versa, so that the height change of the suspension cylinders 50 on the left and right sides is realized, and the drive axle 30 swings around the swing pin 90.
In addition, a slow return valve 54 is arranged at the rodless cavity end of the suspension cylinder 50 to slow down the contraction or extension speed of the suspension cylinder 50 of the excavator under poor working conditions and maintain the stability of the suspension cylinder 50 when the suspension cylinder is jacked for a long time. Meanwhile, the compression or jacking functions of the two side suspension cylinders 50 can be turned on or off through the first control valve group 52 and the second control valve group 53, so that the excavator can adapt to more road conditions and operation requirements.
When the highway-railway dual-purpose excavator works in a railway mode, a driver can control the rotating speed of the hydraulic motor 100 by controlling the degree of stepping on the accelerator pedal, so that the running speed of the excavator is controlled. As shown in fig. 11, the different degrees of pressing the accelerator pedal cause different strokes of the internal plunger of the accelerator pedal device, and different pressures are fed back to the pressure spring of the accelerator pedal proportional valve, thereby causing corresponding changes in the opening size of the oil port. The larger the stroke of stepping on the accelerator pedal is, the higher the output pressure of the oil passage is, the larger the flow rate of the proportional valve output to the hydraulic motor 100 is, the higher the rotation speed of the hydraulic motor 100 is, and the faster the running speed of the excavator is, and vice versa. Meanwhile, when the oil pressure of the hydraulic motor 100 is too high due to the reasons that the excavator encounters too much resistance when running, the excavator runs down a slope due to inertia, or the excavator is pushed to run, etc., oil is automatically returned to protect the hydraulic motor 100.
When the combined excavator is operated in the railway mode, the driver can control the oil pressure at the brake caliper 35 by controlling the degree of stepping on the brake pedal, thereby controlling the braking force and the traveling speed of the excavator. As shown in fig. 12, when the left position of the brake valve 110 is the working position, the hydraulic oil in the oil tank enters the hydraulic oil path of the brake caliper 35 through the brake valve 110, so that the brake caliper 35 clamps the brake disc 36 to achieve the purpose of braking; when the right position of the brake valve 110 is the operating position, the oil supply path between the oil tank and the brake caliper 35 is blocked, the brake caliper 35 is opened, and the brake on the brake disc 36 is canceled. The different degrees of depression of the brake pedal cause different strokes of a plunger inside the brake pedal device, and different pressures are fed back to the caliper 35.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made without departing from the principles of the invention, and these modifications and equivalents are intended to be included within the scope of the claims.
Claims (15)
1. A power traveling system of a road-rail dual-purpose excavator comprises:
a frame (10);
a traveling device mounted on the frame (10);
a connecting frame (20) connected with the frame (10);
a drive axle (30) connected to the connecting frame (20), the drive axle (30) including a differential (31); and
and the walking guide wheel (40) is connected with the drive axle (30).
2. The power walking system of an excavator for both highway and railway as claimed in claim 1, further comprising a suspension cylinder (50), wherein the suspension cylinder (50) is connected with the connecting frame (20) and the driving axle (30) respectively.
3. The power walking system of an excavator for both highway and railway according to claim 2, further comprising a hydraulic control system for controlling the suspension cylinder (50), the hydraulic control system comprising a hydraulic lock (51) for keeping the suspension cylinder (50) at a preset position.
4. The road and railway excavator power running system according to claim 3, wherein the power running system comprises two suspension cylinders (50), the hydraulic control system comprises a first control valve group (52) and a second control valve group (53), the first control valve group (52) is connected to a connecting oil path between rod cavities of the two suspension cylinders (50), and the second control valve group (53) is connected to a connecting oil path between rodless cavities of the two suspension cylinders (50).
5. The road-rail excavator power walking system of claim 1, wherein the connecting frame (20) comprises a downward-opening U-shaped structure (21), and the drive axle (30) is at least partially installed inside the U-shaped structure (21).
6. The power walking system of the excavator for both highway and railway as claimed in claim 5, further comprising a suspension cylinder (50), wherein the inner wall of the U-shaped structure (21) is provided with a mounting seat (22) for mounting the suspension cylinder (50), and the suspension cylinder (50) is connected with the drive axle (30).
7. The power walking system of an excavator for highway and railway use according to claim 1, further comprising a ballast pushing plate (60), wherein the ballast pushing plate (60) is installed on one side of the connecting frame (20) far away from the frame (10).
8. The power walking system of the excavator for highway and railway as claimed in claim 7, wherein a side of the connecting frame (20) far away from the frame (10) is provided with a first lug plate (23) and a second lug plate (24), and the height of the first lug plate (23) in the vertical direction is larger than that of the second lug plate (24);
the ballast pushing plate (60) is rotatably connected with the second lug plate (24), and the ballast pushing plate (60) has a working state and a non-working state; in the non-working state, the ballast pushing plate (60) is connected with the first lug plate (23); in the working state, the ballast pushing plate (60) is disconnected with the first lug plate (23).
9. The power traveling system of an excavator for both highway and railway as claimed in claim 1, wherein the drive axle (30) further comprises an output half shaft (32), the output half shaft (32) comprises a half shaft body (321) and a connecting portion (322), the half shaft body (321) is connected between the differential (31) and the traveling guide wheel (40), the connecting portion (322) is arranged at the end of the half shaft body (321) and is integrally formed with the half shaft body (321), and the connecting portion (322) is connected with the traveling guide wheel (40).
10. The power traveling system of an excavator for both highway and railway according to claim 1, further comprising a lift cylinder (70), wherein the lift cylinder (70) is connected between the frame (10) and the connecting frame (20).
11. The power walking system of the excavator for both highway and railway as claimed in claim 10, further comprising a base (80), wherein the base (80) is provided with a first connecting hole (81) and a second connecting hole (82), and the height of the first connecting hole (81) in the vertical direction is larger than the height of the second connecting hole (82) in the vertical direction;
the connecting frame (20) comprises an extension part (25), the extension part (25) is provided with a third connecting hole (26) and a fourth connecting hole (27), and the third connecting hole (26) is arranged at a position closer to the frame (10) than the fourth connecting hole (27);
wherein the lifting cylinder (70) is connected with the base (80) through the first connecting hole (81) and is connected with the connecting frame (20) through the fourth connecting hole (27); the base (80) is connected with the connecting frame (20) through the second connecting hole (82) and the third connecting hole (26).
12. The power traveling system of the road and railway dual-purpose excavator as claimed in claim 1, further comprising a swing pin shaft (90), wherein a swing hole (34) is formed in an axle housing (33) of the drive axle (30), and the connecting frame (20) is provided with a first mounting hole (28) for mounting the swing pin shaft (90);
the swing pin shaft (90) penetrates through the swing hole (34) and the mounting hole (28) to connect the drive axle (30) and the connecting frame (20), so that the drive axle (30) swings around the central axis of the swing pin shaft (90).
13. The road-rail excavator power running system according to claim 1, further comprising a brake caliper (35) and a brake disc (36);
the brake caliper (35) is fixedly connected with an axle housing (33) of the drive axle (30), the brake disc (36) is fixedly connected with the walking guide wheel (40), and the brake caliper (35) is configured to clamp the brake disc (36) to brake the walking guide wheel (40).
14. The power traveling system of an excavator according to claim 13, wherein a circumferential side surface of the brake disc (36) is provided with a first flange portion (361) and a second flange portion (362), a recessed portion is formed between the first flange portion (361) and the second flange portion (362), the first flange portion (361) is engaged with the brake caliper (35), and the second flange portion (362) is fixedly connected with the traveling guide wheel (40).
15. An excavator for highway and railway use, comprising a power traveling system of the excavator for highway and railway use according to any one of claims 1 to 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111682029.9A CN114312179A (en) | 2021-12-28 | 2021-12-28 | Power traveling system of highway-railway dual-purpose excavator and highway-railway dual-purpose excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111682029.9A CN114312179A (en) | 2021-12-28 | 2021-12-28 | Power traveling system of highway-railway dual-purpose excavator and highway-railway dual-purpose excavator |
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| Publication Number | Publication Date |
|---|---|
| CN114312179A true CN114312179A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111682029.9A Pending CN114312179A (en) | 2021-12-28 | 2021-12-28 | Power traveling system of highway-railway dual-purpose excavator and highway-railway dual-purpose excavator |
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| CN (1) | CN114312179A (en) |
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