Railway walking device lifting mechanism for miniature excavator

Abstract

The utility model discloses a railway walking device lifting mechanism for a miniature excavator, which is matched with the excavator in use, the excavator comprises a frame, a dozer blade arranged on the rear side of the frame, crawler belts arranged on two sides of the frame and driven to rotate through a first chain wheel, a lifting oil cylinder, a pair of lifting walkers and a driven walking wheel set, the lifting walkers are arranged on the left side and the right side of the frame respectively and comprise power shafts, lifting control arms and driving walking wheels, the power shafts are arranged on the side faces of the frame and are in transmission connection with the first chain wheels, the rear portions of the lifting control arms are rotatably connected with the frame, and the lifting oil cylinders are arranged on the front side of the frame and used for controlling the lifting control arms to rotate; compared with the prior art, the track driving walking device has the advantages that track driving walking of the excavator is achieved through lifting, and the track driving walking device is wide in application range and high in use flexibility.

Description

Technical Field

[0001] The utility model relates to the field of railway running gear, in particular to a railway running gear lifting mechanism for a mini excavator. Background Art

[0002] Track travel of a mini excavator means that the device can move along a certain track or path. This track travel makes it easier for the excavator to perform fixed-point operations, move quickly, and switch between different positions on the construction site, thereby improving work efficiency and accuracy. Therefore, it can be operated more accurately in track maintenance operations, such as repairing tracks and replacing ballast stones. Moreover, track maintenance operations are usually carried out in a limited space, and the excavator can operate in a small area, which improves work efficiency.

[0003] Generally, the track travel of an excavator is achieved by installing wheels or similar walking devices at the bottom thereof, so that the excavator can move on the track and can move flexibly in different terrains and environments. For this, reference can be made to the patent previously applied for by the same applicant, patent number: CN218026943U Patent name: A mini excavator for railway construction walking auxiliary drive wheel, including a driving wheel group and a passive wheel group arranged on the left and right outer sides of the crawler, the driving wheel group includes a coupling cylinder, a mounting seat, a transmission disc, a bushing, a driving shaft and a driving wheel, the coupling cylinder is coaxially fixedly connected to the sprocket and extends outward, the mounting seat is fixedly arranged on the frame, the bushing is installed in the mounting seat and is coaxial with the coupling cylinder, the driving shaft is rotatably arranged in the bushing, the transmission disc is fixedly arranged on the end face of the driving shaft and is transmission-connected with the coupling cylinder, the driving wheel is fixed and concentrically connected to the other end face of the driving shaft, the passive wheel group includes a fixed shaft fixedly connected to the excavator, and the passive wheel is rotatably arranged on the fixed shaft. It can be seen that this device realizes track walking by converting the crawler power. However, the application scope of this device is limited to the case where the width of the excavator is smaller than the width of the track. Therefore, the scope of use is limited. In this regard, the inventor proposes a lifting mechanism that can enable excavators of various sizes to achieve track walking, thereby improving the flexibility of use and the scope of application. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the above technical defects and provide a railway walking device lifting mechanism for a mini excavator.

[0005] The present design proposes a lifting mechanism for a railway walking device for a mini excavator, which is used in conjunction with the excavator. The excavator includes a frame, a bulldozer arranged at the rear side of the frame, and crawlers arranged at both sides of the frame and driven to rotate by a first sprocket. The lifting mechanism includes a lifting cylinder, a pair of lifting walkers and a passive walking wheel group, wherein the pair of lifting walkers are respectively arranged on the left and right sides of the frame, and include a power shaft, a lifting control arm and an active walking wheel. The power shaft is horizontally and rotatably arranged on the side of the frame and is connected to the first sprocket by transmission. The rear part of the lifting control arm is rotatably connected to the frame. The lifting cylinder is arranged on the front side of the frame and is used to control the rotation of the lifting control arm. The active walking wheel is rotatably arranged at the front of the lifting control arm and is connected to the power shaft by transmission. The passive walking wheel group is detachably arranged on the lower side of the bulldozer.

[0006] Furthermore, the middle parts of the lifting control arms of the two lifting walkers are connected by a connecting beam.

[0007] Furthermore, the cylinder body of the lifting cylinder is hinged to the frame, and the front end of the piston rod is hinged to the middle part of the connecting beam.

[0008] Furthermore, the lifting walker also includes a mounting seat fixedly set on the frame, a coupling cylinder coaxially fixedly connected to the first sprocket, and a transmission plate fixedly connected to the power shaft. A shaft sleeve for pivotally mounting the power shaft is provided in the mounting seat, and the transmission plate engages with the coupling cylinder to realize transmission connection.

[0009] Furthermore, a bearing pivotally connected to the power shaft is provided on the lifting control arm, the power shaft is installed in the bearing and penetrates the lifting control arm outwardly, the active walking wheel is arranged on the inner side of the lifting control arm, which is pivotally connected to the lifting control arm through the wheel axle, and the wheel axle penetrates the lifting control arm outwardly.

[0010] Furthermore, the outer ends of the wheel axle of the active walking wheel and the power shaft are respectively fixed with a second sprocket and a third sprocket, and the second sprocket is connected with the third sprocket through a chain transmission.

[0011] Furthermore, a tensioning module for adjusting the axial center distance between the second sprocket and the third sprocket is provided at the front portion of the lifting control arm.

[0012] Furthermore, the lifting control arm is composed of a movable part at the front and a fixed part at the rear, and the tensioning module includes a guide hollow and a guide shaft for guiding the movable part to move linearly, and a tensioning screw screwed on the fixed part and abutting against the movable part.

[0013] After adopting the above structure, the advantages of the utility model compared with the prior art are: the design of the present invention enables the excavator to walk on the track and realize movement on a specific path through the movable design of the lifting control arm, which is very useful in track maintenance and other operations that require movement along the track; its form can adapt to excavators with a track width greater than the track width, so it is more flexible to use and has a wider range of applications; it adopts a lossless connection configuration for the excavator, which is convenient and controllable to use and install, thereby improving the versatility, adaptability and operating efficiency of the excavator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of embodiment 1 of a lifting mechanism of a railway traveling device for a micro excavator according to the utility model.

[0015] Figure 2 It is a right view schematic diagram of embodiment 1 of a lifting mechanism of a railway traveling device for a micro excavator of the utility model.

[0016] Figure 3 The utility model is a bottom view schematic diagram of a lifting mechanism of a railway running device for a micro excavator according to embodiment 1 of the present invention.

[0017] Figure 4 The utility model is a schematic diagram of the power shaft structure of embodiment 1 of the lifting mechanism of the railway running device for a micro excavator.

[0018] Figure 5 It is an enlarged schematic diagram of a tensioning module of Example 1 of a lifting mechanism of a railway traveling device for a micro excavator of the utility model.

[0019] As shown in the figure: 1. frame, 2. bulldozer, 3. crawler, 4. first sprocket, 5. lifting cylinder, 6. lifting walker, 7. passive walking wheel group, 8. power shaft, 9. lifting control arm, 10. active walking wheel, 11. connecting beam, 12. mounting seat, 13. coupling cylinder, 14. transmission plate, 15. bushing, 16. bearing, 17. axle, 18. second sprocket, 19. third sprocket, 20. tensioning module, 21. movable part, 22. fixed part, 23. guide hollow, 24. guide shaft, 25. tensioning screw, 26. bulldozer cylinder, 27. chain. DETAILED DESCRIPTION

[0020] The following are only preferred embodiments of the present invention, which do not limit the protection scope of the present invention. The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Embodiment 1:

[0022] See attached Figure 1-5, this lifting mechanism needs to be used in conjunction with an excavator. In conjunction with the accompanying drawings, the excavator in this embodiment is a common form, which includes a frame 1, a bulldozer 2 arranged at the rear side of the frame 1, and crawlers 3 arranged on both sides of the frame 1 and driven to rotate by a first sprocket 4. The excavator drives the crawlers 3 and the bulldozer 2 through its own hydraulic power.

[0023] This design uses the hydraulic power of the excavator itself to complete lifting and walking, so the structure is simple and does not require the intervention of an additional power source. The lifting mechanism includes a lifting cylinder 5, a pair of lifting walkers 6 and a passive walking wheel set 7.

[0024] Among them, it can be seen from the accompanying drawings that the passive travel wheel set 7 includes a wheel frame and a pair of passive wheels, which are installed on the lower side of the bulldozer 2. In order to facilitate disassembly, a pin-fixed form is adopted for installation, and the passive travel wheel set 7 can be pressed down and grounded through the bulldozer cylinder 26 of the excavator itself, and contact the track when walking on the track.

[0025] A pair of lifting walkers 6 are respectively arranged on the left and right sides of the frame 1, which can be driven by the lifting cylinder 5 to lift the excavator frame 1 and transmit the power of the crawler 3 to complete the walking. The lifting walker 6 includes a power shaft 8, a lifting control arm 9 and an active walking wheel 10. In conjunction with the accompanying drawings, the power shaft 8 is horizontally and rotatably arranged on the side of the frame 1 and is connected to the first sprocket 4, while the rear of the lifting control arm 9 is rotatably connected to the frame 1, and the active walking wheel 10 is rotatably arranged at the front of the lifting control arm 9 and is connected to the power shaft 8.

[0026] Specifically, the power transmission process is first sprocket 4-power shaft 8-active travel wheel 10, wherein the transmission of the first sprocket 4 and the power shaft 8 also relies on the mounting seat 12 fixedly set on the frame 1, the coupling cylinder 13 coaxially fixedly connected to the first sprocket 4, and the transmission disc 14 fixedly connected to the power shaft 8. The mounting seat 12 is provided with a sleeve 15 for pivotally mounting the power shaft 8. The form of the transmission disc 14 and the coupling cylinder 13 is consistent with that proposed in the patent previously applied by the same applicant: A railway construction travel auxiliary driving wheel for a mini excavator, and the two can be meshed to realize transmission connection. In this way, the transmission of the power shaft 8 and the first sprocket 4 is realized.

[0027] At the same time, a bearing 16 pivotally connected to the power shaft 8 is provided on the lifting control arm 9, and the power shaft 8 is installed in the bearing 16 and penetrates the lifting control arm 9 outwardly. The active walking wheel 10 is arranged on the inner side of the lifting control arm 9, and is pivotally connected to the lifting control arm 9 through the wheel axle 17, and the wheel axle 17 penetrates the lifting control arm 9 outwardly. In this way, power transmission can be achieved on the outer side of the lifting control arm 9. Specifically, the outer ends of the wheel axle 17 of the active walking wheel 10 and the power shaft 8 are respectively fixed with a second sprocket 18 and a third sprocket 19, and the second sprocket 18 and the third sprocket 19 are connected by a chain 27. It can be seen that no matter how the lifting control arm 9 rotates, the transmission of the power of the active walking wheel 10 is not affected.

[0028] The middle parts of the lifting control arms 9 of the two lifting walkers 6 are connected by a connecting beam 11. The cylinder body of the lifting cylinder 5 is hinged to the frame 1, and the front end of the piston rod is hinged to the middle part of the connecting beam 11. It can be seen that the lifting cylinder 5 is arranged at the front side of the frame 1 and can control the rotation of the lifting control arm 9 through its own extension and contraction, thereby completing the lifting and lowering of the frame 1.

[0029] In order to maintain the above-mentioned chain tension, the front part of the lifting control arm 9 also needs to be provided with a tensioning module 20 for adjusting the center distance between the second sprocket 18 and the third sprocket 19 shaft 17. In this embodiment, the lifting control arm 9 is composed of a movable part 21 at the front and a fixed part 22 at the rear. The tensioning module 20 includes a guide hollow 23 and a guide shaft 24 for guiding the linear movement of the movable part 21, and a tensioning screw 25 screwed on the fixed part 22 and abutting against the movable part 21. In conjunction with the accompanying drawings, the linear hollow is opened on the movable part 21, and the guide shaft 24 is a bolt that is slidably connected to the linear hollow, and this bolt can also be screwed and fixed to the movable part 21. The tensioning screw 25 can push the movable part 21 forward by its own screwing in, so that the chain remains tensioned.

[0030] When the device is moving on the track, it is necessary to lower the lifting control arm 9 and the bulldozer 2. At this time, the active walking wheel 10 and the passive walking wheel group 7 can contact the track, and the active walking wheel 10 can also provide the power for movement synchronously, so that the track walking is realized and the crawler 3 does not damage the track.

[0031] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A lifting mechanism for a railway running gear for a mini excavator, which is used in conjunction with an excavator, wherein the excavator comprises a frame (1), a bulldozer (2) arranged at the rear side of the frame (1), and crawlers (3) arranged at both sides of the frame (1) and driven to rotate by a first sprocket (4), wherein: The invention comprises a lifting cylinder (5), a pair of lifting walkers (6) and a passive walking wheel group (7), wherein the pair of lifting walkers (6) are respectively arranged on the left and right sides of the frame (1), and comprise a power shaft (8), a lifting control arm (9) and an active walking wheel (10), wherein the power shaft (8) is horizontally and rotatably arranged on the side of the frame (1) and is connected to the first sprocket (4) in a transmission manner, the rear part of the lifting control arm (9) is rotatably connected to the frame (1), the lifting cylinder (5) is arranged on the front side of the frame (1) and is used to control the rotation of the lifting control arm (9), the active walking wheel (10) is rotatably arranged on the front part of the lifting control arm (9) and is connected to the power shaft (8), and the passive walking wheel group (7) is detachably arranged on the lower side of the bulldozer (2).

2. The lifting mechanism of the railway running gear for a mini excavator according to claim 1 is characterized in that: The middle parts of the lifting control arms (9) of the two lifting walkers (6) are connected via a connecting beam (11).

3. The lifting mechanism of the railway running gear for a mini excavator according to claim 2 is characterized in that: The cylinder body of the lifting oil cylinder (5) is hinged to the vehicle frame (1), and the front end of the piston rod is hinged to the middle part of the connecting beam (11).

4. The railway running gear lifting mechanism for a mini excavator according to claim 1 is characterized in that: The lifting walking device (6) also includes a mounting seat (12) fixedly arranged on the frame (1), a coupling cylinder (13) coaxially fixedly connected to the first sprocket (4), and a transmission plate (14) fixedly connected to the power shaft (8), wherein a shaft sleeve (15) for pivotally mounting the power shaft (8) is arranged in the mounting seat (12), and the transmission plate (14) is meshed with the coupling cylinder (13) to realize transmission connection.

5. The lifting mechanism of the railway running gear for a mini excavator according to claim 4 is characterized in that: A bearing (16) is provided on the lifting control arm (9) and is pivotally connected to the power shaft (8). The power shaft (8) is installed in the bearing (16) and penetrates the lifting control arm (9) outwardly. An active walking wheel (10) is provided on the inner side of the lifting control arm (9) and is pivotally connected to the lifting control arm (9) via a wheel axle (17), and the wheel axle (17) penetrates the lifting control arm (9) outwardly.

6. The lifting mechanism of the railway running gear for a mini excavator according to claim 5 is characterized in that: A second sprocket (18) and a third sprocket (19) are fixedly provided on the outer ends of the wheel axle (17) of the active walking wheel (10) and the power shaft (8), respectively. The second sprocket (18) and the third sprocket (19) are connected in transmission via a chain (27).

7. The railway running gear lifting mechanism for a mini excavator according to claim 6 is characterized by: The front part of the lifting control arm (9) is provided with a tensioning module (20) for adjusting the center distance between the second sprocket (18) and the third sprocket (19) shaft (17).

8. The railway running gear lifting mechanism for a mini excavator according to claim 7 is characterized in that: The lifting control arm (9) is composed of a movable part (21) at the front and a fixed part (22) at the rear. The tensioning module (20) includes a guide hollow (23) and a guide shaft (24) for guiding the movable part (21) to move linearly, and a tensioning screw (25) screwed on the fixed part (22) and abutting against the movable part (21).

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