Turning system of plank road paving machine suitable for small-radius turning

Abstract

The utility model discloses a turning system of a plank road paving machine suitable for small-radius turning, and belongs to the field of construction equipment. According to the utility model, the independent single guide wheels are respectively arranged on the two sides, and the distance between the track and the guide wheels can be kept unchanged, so that the situation that the guide wheels are stuck is avoided. Meanwhile, by arranging the slewing bearing, the bogie can rotate relative to the slewing bearing around the axis perpendicular to the plane where the plank road track is located in the normal direction, and therefore when the double-shaft guide frame enters a curve, the guide wheels follow the non-linear arrangement of the plank road track to execute steering motion, and the turning radius is reduced. When the plank road paving machine makes a turn with a small radius in the walking process, the angle can be automatically adjusted through the guide of the guide wheel and the rotary support according to the shape of a track curve, so that the guide wheel is better attached to a web of a plank road track, abrasion of the guide wheel to the plank road track is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of construction equipment, and in particular relates to a turning system of a plank road paving machine suitable for small-radius turning. Background Art

[0002] To address the issue of avoiding damage to the natural environment during the construction of aerial plank roads in mountainous areas, without having to build uphill transport roads or damage trees and vegetation, the plank road utilizes the load-bearing beam structure at the bottom, on which the running track is laid, and the track is installed while being laid. This construction method is simple to operate, safe, efficient, environmentally friendly, and low-cost, which can further improve the construction efficiency of the project.

[0003] Previous plank road laying machines had a turning radius too small to meet the requirements of plank road construction, and the guide wheels were prone to getting stuck during operation. For example, the utility model patent application number CN201520609458.7 provides a bridge crane. The front and rear axles of this device are always parallel during turning. This causes a certain angle difference between the contact point between the guide wheel and the plank road track, resulting in incomplete contact between the guide wheel and the plank road track. This causes significant friction on the plank road track web, shortening the service life. Summary of the Invention

[0004] The purpose of the utility model is to solve the problem of too small turning radius of a plank road laying machine in the prior art and to provide a turning system of a plank road laying machine suitable for small-radius turning.

[0005] The specific technical solutions adopted in this utility model are as follows:

[0006] A plank road paving machine turning system suitable for small-radius turning, comprising a first bogie, a second bogie and a chassis assembly;

[0007] The first bogie and the second bogie adopt the same structure, both including a frame body, a slewing bearing, a running wheel, a transition assembly, a side wheel frame, a guide wheel and a driving mechanism; the slewing bearing is fixed to the top of the frame body and can rotate around a vertical rotating shaft; the frame body is arranged along the width direction of the plank road laying machine, and a side wheel frame is fixed on each side of the frame body through a transition assembly, and a guide wheel is fixed on the side of each side wheel frame facing the plank road track on which the plank road laying machine travels, and the wheel surface of the guide wheel can roll against the side of the plank road track; a pair of running wheels that can run on two plank road tracks are installed under the frame body, and the driving mechanism is used to provide driving power for the running wheels;

[0008] The chassis assembly is integrally mounted on two slewing bearings on the first bogie and the second bogie. The first bogie and the second bogie can slew at different angles relative to the chassis assembly through their respective slewing bearings.

[0009] Preferably, the plank road track is an I-beam track, the upper flange of the I-beam track is used for the running wheels, and the outer side surface of the web of the I-beam track is used for the running of the guide wheels.

[0010] Preferably, the driving mechanism includes a tram drive axle assembly and a motor, a running wheel is installed at each end of the wheel axle of the tram drive axle assembly, the tram drive axle assembly is installed on the frame, and the motor is assembled on the tram drive axle assembly. The motor and the tram drive axle assembly together constitute the running power system of the plank road paving machine.

[0011] Preferably, the motor is powered by a battery.

[0012] Preferably, the first bogie and the second bogie are of exactly the same model and specification.

[0013] Preferably, the top of the side wheel frame is connected to the transition assembly by bolts, and different bolt hole positions are provided on the transition assembly. The side wheel frames on both sides of the same bogie change the wheel spacing of the two guide wheels by adjusting the bolt hole positions installed on the transition assembly.

[0014] Preferably, the guide wheel is movably mounted on the side wheel frame by fixing screws.

[0015] Preferably, the side wheel frame adopts an L-shaped steel member.

[0016] Preferably, the transition assembly is welded from steel sections and steel plates.

[0017] Preferably, a slewing bearing connection structure is provided on the top of the chassis assembly for connecting with other fuselage mechanisms of the plank road paving machine.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This utility model replaces the original dual guide wheels with a single guide wheel. Conventional equipment uses two horizontal protection wheels and one vertical protection wheel. As small turns are made, the distance between the track and the outer lateral wheel decreases, and the distance between the track and the inner lateral wheel also decreases. This can cause the lateral wheel and track to become stuck, making it difficult to adapt to small turning radii. The utility model uses a single guide wheel on each side, which maintains the distance between the track and the guide wheel, preventing the wheel from becoming stuck.

[0020] 2. The slewing support of the present invention can automatically adjust the angle according to the shape of the track. The present invention sets a bogie that can rotate relative to the slewing support around an axis that is perpendicular to the plane of the plank road track, so that when the dual-axis guide frame enters a curve, the guide wheels follow the non-linear layout of the plank road track and perform a turning movement, thereby reducing the turning radius. When the plank road laying machine makes a small radius turn during its travel, the slewing support can automatically adjust the angle according to the shape of the track curve through the guidance of the guide wheels. A guide wheel is used on the outside of each walking wheel to move along the side of the track, which has a guiding and restraining effect on the walking wheel. Through the guidance of the guide wheels, the first bogie and the second bogie can rotate at different angles along their respective slewing supports.

[0021] 3. When turning at a small radius, the first bogie and the second bogie of the utility model form a relative turning angle, which can make the guide wheel better fit the web of the plank road track, reduce the wear of the guide wheel pair and the plank road track, and improve the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the turning radius adaptation system of the plank road laying machine on the track;

[0023] Figure 2 This is a schematic diagram of the structure of two bogies in the turning system of the plank road laying machine;

[0024] Figure 3 Schematic diagram of the status of two bogies during the turning process;

[0025] Figure 4 The diagram is a schematic diagram of the rotation of the two bogies during the turning process. The arrows in the figure indicate the rotation direction of the slewing bearing.

[0026] The reference numerals in the figure are: plank track 1, first bogie 2, second bogie 3, chassis assembly 4, frame body 21, slewing bearing 22, running wheel 23, transition assembly 24, side wheel frame 25, guide wheel 26, tram drive axle assembly 27, motor 28, slideway 5, and wheel axle system 6. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The technical features of the various embodiments of the present invention may be combined accordingly, provided that there is no conflict between them.

[0028] In the description of the present invention, it should be understood that when an element is considered to be "connected" to another element, it can be directly connected to the other element or indirectly connected, that is, there are intermediate elements. On the contrary, when an element is said to be "directly" connected to another element, there are no intermediate elements.

[0029] In the description of this utility model, it should be understood that the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0030] like Figure 1 As shown, the turning radius of a conventional plank road laying machine when traveling on two parallel plank road tracks 1 is too small to meet the requirements of the plank road project, and the guide wheels are easily stuck during the movement of the plank road laying machine. In a preferred embodiment of the present invention, a plank road laying machine turning system suitable for small-radius turns is provided, the main components of which include a first bogie 2, a second bogie 3, and a chassis assembly 4. The plank road laying machine turning system can reduce the turning radius of the plank road laying machine, optimize the guide wheels to prevent them from getting stuck, and at the same time reduce the friction between the guide wheels and the tracks, thereby increasing their service life. The specific structure of the three components and the assembly and actuation relationship are described in detail below.

[0031] like Figure 2 As shown, the first bogie 2 and the second bogie 3 have the same structure. Each bogie includes a frame 21, a slewing bearing 22, a running wheel 23, a transition assembly 24, a side wheel frame 25, a guide wheel 26, and a drive mechanism. The frame 21 is an elongated member for mounting other components. The disc-shaped slewing bearing 22 is fixed to the top of the frame 21 and can rotate around a vertical axis. The frame 21 is arranged along the width of the plank road laying machine. A side wheel frame 25 is fixed on each side of the frame 21 via a transition assembly 24. Each side wheel frame 25 is fixed to a guide wheel 26. The guide wheel 26 needs to be located on the side of the plank road track 1 on which the plank road laying machine travels, so that the wheel surface of the guide wheel 26 can roll against the side of the plank road track 1 to provide a guiding function. A pair of running wheels 23 capable of running on the two plank road tracks 1 are installed below the frame 21. The drive mechanism is used to provide driving power for the running wheels 23.

[0032] It should be noted that the above-mentioned driving mechanism can be implemented by any driving mechanism suitable for a plank road laying machine. In an embodiment of the present utility model, the driving mechanism includes a tram drive axle assembly 27 and a motor 28. The two ends of the wheel axle of the tram drive axle assembly 27 are each equipped with a running wheel 23. The tram drive axle assembly 27 is installed on the frame 21. The motor 28 is assembled on the tram drive axle assembly 27. The motor 28 and the tram drive axle 27 assembly together constitute the walking power system of the plank road laying machine. The motor 28 can be powered by a battery or by connecting to a municipal power grid or other external power supply facilities. However, considering the special environment of the plank road laying operation in the mountains and forests, it is preferred to consider using a battery to provide power.

[0033] It should be noted that the function of the transition assembly 24 is to provide a mounting position for the side wheel frame 25 and the guide wheel 26, while ensuring that the wheel spacing between the guide wheels 26 on both sides is adjustable. The transition assembly 24 can be implemented as a steel component, and its shape is not limited, but it should have a mounting surface that can be installed in a manner that fits the frame body 21, and it should also provide a mounting position for the side wheel frame 25. In an embodiment of the present utility model, in order to ensure the strength of the connection position of the transition assembly 24, the transition assembly 24 is welded together from steel sections and steel plates. The steel sections connect the frame body 21 and the side wheel frame 25. The connection position between the transition assembly 24 and the side wheel frame 25 is structurally reinforced by additional steel plates as stiffening ribs.

[0034] In the embodiment of the present invention, the side wheel frame 25 is implemented as an L-shaped steel member. The top of its vertical section is connected to the bottom mounting surface of the transition assembly 24, while the horizontal section is used to mount the guide wheel 26. The axle of the guide wheel 26 is installed vertically, so that the guide wheel 26 is arranged horizontally as a whole, and its wheel surface can roll along the side of the plank road track 1 on which the plank road paving machine travels. The four guide wheels 4-2 can guide the sides of the entire plank road paving machine chassis 1 along the plank road track 1 to prevent the entire machine from tipping over or sliding off the track.

[0035] In an embodiment of the present invention, the plank road track 1 can preferably be an I-beam track. The upper flange of the I-beam track is arranged horizontally for the running wheels 23 to run, and the outer side surface of the web of the I-beam track is used for the running of the guide wheels 26. When the plank road laying machine is running, the guide wheels 26 slide along the outer wall of the web of the plank road track 1. The guide wheels in the present invention adopt a method of using a single guide wheel on each side. The distance between the track and the guide wheel can remain unchanged. At the same time, the guide wheel can also be adjusted in position to prevent the guide wheel from getting stuck due to the different distances between the inner and outer sides when turning.

[0036] In addition, the first bogie 2 and the second bogie 3 each have a rotatable slewing bearing 22, and the two are in the same plane, thereby providing an installation plane for the chassis assembly 4 of the plank road laying machine. The chassis assembly 4 of the plank road laying machine is integrally mounted on the two slewing bearings 22 on the first bogie 2 and the second bogie 3. The rotational freedom of the first bogie 2 and the second bogie 3 is independent, so the two can rotate at different angles relative to the chassis assembly 4 through their respective slewing bearings 22. As a result, the two slewing bearings can rotate relative to the slewing bearings around an axis that is perpendicular to the plane where the plank road track is located, so that when the dual-axis guide frame enters a curve, the guide wheels follow the non-linear layout of the plank road track and perform a steering movement, thereby reducing the turning radius. When the plank road laying machine makes a small radius turn during its movement, the slewing support can automatically adjust its angle according to the shape of the track curve through the guidance of the guide wheels. Each running wheel is equipped with a guide wheel on the outside to move along the side of the track, which has the function of guiding and restraining the running wheel. Through the guidance of the guide wheel, the first bogie and the second bogie can rotate at different angles along their respective slewing bearings, such as Figure 3 and Figure 4 Moreover, when making a small radius turn, the first bogie and the second bogie form a relative angle, which allows the guide wheel to better fit the plank track web, reducing wear on the guide wheel pair and the plank track and increasing service life.

[0037] In the above-mentioned plank road laying machine turning system, the model and specifications of the first bogie 2 and the second bogie 3 are preferably exactly the same to ensure the overall stability of the plank road laying machine during operation. Of course, differences in some components are allowed as long as they do not affect the operation of the plank road laying machine.

[0038] Furthermore, since the track gauge of the plank road track 1 at the bottom of the plank road paving machine often varies in different construction scenarios, in order to adapt the turning system to different track gauges, the spacing between the guide wheels 26 on the two side wheel frames 25 can be adjusted by changing the relative mounting positions of the frame 21, transition assembly 24, and side wheel frames 25. Furthermore, this relative mounting position adjustment can be achieved by either changing the mounting spacing of the left and right transition assemblies 24 on the frame 21 or by changing the mounting spacing of the two side wheel frames 25 on the transition assembly 24. In theory, both can achieve the corresponding functions. In the embodiment of the present utility model, the need to adjust the spacing between the two guide wheels 26 is achieved by changing the mounting spacing of the two side wheel frames 25 on the transition assembly 24. Specifically, the top of the side wheel frame 25 is bolted to the transition assembly 24, and the transition assembly 24 has different bolt hole positions. By adjusting the bolt hole positions installed on the transition assembly 24, the side wheel frames 25 on both sides of the same bogie can change the wheel spacing between the two guide wheels 26, thereby adapting to different track gauges. The guide wheel 26 can be movably mounted on the side wheel frame 25 by means of fixing screws or the like, so as to facilitate disassembly and maintenance.

[0039] Finally, it should be noted that the present invention mainly relates to the turning system below the chassis assembly 4 of the plank road paving machine. The upper structure of the plank road paving machine is not limited and can be designed with reference to the plank road paving machine in the prior art. No limitation is imposed on this. Figure 4 As shown, the chassis assembly 4 can be equipped with a corresponding axle system 6 and a side wheel frame slide 5 (providing sliding adjustment freedom for the side wheel frame) as needed. Furthermore, the top of the chassis assembly 4 can be provided with a slewing bearing connection structure as needed for connection to other fuselage mechanisms of the plank road laying machine. For example, if the other fuselage mechanisms of the plank road laying machine include a lifting mechanism that requires rotation, the chassis assembly 4 can be connected to the plank road laying machine's lifting mechanism by providing a slewing bearing connection member on its top, and the fuselage slewing bearing can be connected to the chassis assembly 4. The first bogie 2 is connected to the chassis assembly 4 via a first slewing bearing 22, and the second bogie 3 is connected to the chassis assembly 4 via a second slewing bearing 32, thereby enabling the entire upper fuselage mechanism to rotate freely.

[0040] Based on this turning system, when the plank road laying machine makes a small-radius turn during travel, the guide wheels guide the two slewing bearings to independently and automatically adjust their angles according to the track curve. A guide wheel on the outside of each running wheel moves along the side of the track, guiding and restraining the running wheels. Guided by the guide wheels, the first and second bogies can rotate along the first and second slewing bearings at different angles, forming a relative angle to achieve a small-radius turn.

[0041] The following is a specific preferred example to demonstrate the effects achieved by the present invention. In this example, the plank road track span is 1.9 meters, and the track width is 300 mm. The wheelbases of the axles (tram drive axle assemblies) of the first bogie 2 and the second bogie 3 are both 1900 mm. The center distance between the two bogies is 1900 mm, and the center distance between the running wheels is 1799 mm. The running wheels utilize press-fit solid tires with 229 mm wide treads. In this example, the spacing between the two guide wheels is 1915 mm. This example can be achieved by using the minimum turning radius of the inner track to achieve an 8-meter turning radius. When the plank road laying machine is traveling along the inner track, the guide wheels 26 on either side of the first bogie 2 guide the slewing support 22 to automatically adjust its angle according to the curve of the plank road track 1, allowing the first bogie 2 to turn along the slewing support 22. Subsequently, the guide wheels 36 on either side of the second bogie 3 guide the slewing support 32 to automatically adjust its angle according to the curve of the plank road track 1, allowing the second bogie 3 to turn along the slewing support 32. During a turn, the angles of the two bogies differ due to their front-to-rear position difference, and the angles of the two bogies continuously change. When negotiating a curve with an 8m turning radius on the inner track, the two bogie axes can form a maximum relative angle of 20.61°. A guide wheel on the outside of each running wheel moves along the side of the track, guiding and restraining the running wheels. Guided by the guide wheels, the first and second bogies can slew at different angles along the two slewing bearings, enabling tight turns.

[0042] The above-described embodiment is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Persons skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent substitution or equivalent transformation falls within the scope of protection of the present invention.

Claims

1. A turning system for a plank road laying machine suitable for small-radius turning, characterized in that: It comprises a first bogie (2), a second bogie (3) and a chassis assembly (4); The first bogie (2) and the second bogie (3) have the same structure, and both include a frame (21), a slewing bearing (22), a running wheel (23), a transition assembly (24), a side wheel frame (25), a guide wheel (26) and a driving mechanism; the slewing bearing (22) is fixed to the top of the frame (21) and can rotate around a vertical rotation axis; the frame (21) is arranged along the width direction of the plank road laying machine, and a side wheel frame (25) is fixed on each of its two sides through a transition assembly (24); a guide wheel (26) is fixed on each side of the side wheel frame (25) facing the plank road track (1) on which the plank road laying machine travels, and the wheel surface of the guide wheel (26) can roll against the side of the plank road track (1); a pair of running wheels (23) capable of running on the two plank road tracks (1) are installed below the frame (21), and the driving mechanism is used to provide driving power for the running wheels (23); The chassis assembly (4) is integrally mounted on two slewing bearings (22) on the first bogie (2) and the second bogie (3); the first bogie (2) and the second bogie (3) are capable of slewing at different angles relative to the chassis assembly (4) via their respective slewing bearings (22).

2. The plank road laying machine turning system suitable for small radius turning according to claim 1, characterized in that: The plank road track (1) is an I-beam track, the upper flange of the I-beam track is used for the running wheels (23) to run, and the outer side surface of the web of the I-beam track is used for the running of the guide wheels (26).

3. The plank road laying machine turning system suitable for small radius turning according to claim 1, characterized in that: The driving mechanism comprises a tram driving axle assembly (27) and a motor (28); both ends of the wheel axle of the tram driving axle assembly (27) are respectively provided with a running wheel (23); the tram driving axle assembly (27) is mounted on a frame (21); the motor (28) is mounted on the tram driving axle assembly (27); and the motor (28) and the tram driving axle assembly (27) together constitute a running power system of the plank road laying machine.

4. The plank road laying machine turning system suitable for small radius turning according to claim 3, characterized in that: The motor (28) is powered by a battery.

5. The plank road laying machine turning system suitable for small radius turning according to claim 1, characterized in that: The first bogie (2) and the second bogie (3) are of exactly the same model and specification.

6. The plank road laying machine turning system suitable for small radius turning according to claim 1, characterized in that: The top of the side wheel frame (25) is connected to the transition assembly (24) by bolts, and the transition assembly (24) is provided with different bolt hole positions. The side wheel frames (25) on both sides of the same bogie can change the wheel spacing of the two guide wheels (26) by adjusting the bolt hole positions installed on the transition assembly (24).

7. The plank road laying machine turning system suitable for small radius turning according to claim 1, characterized in that: The guide wheel (26) is movably mounted on the side wheel frame (25) via fixing screws.

8. The plank road laying machine turning system suitable for small radius turning according to claim 1, characterized in that: The side wheel frame (25) is an L-shaped steel member.

9. The plank road laying machine turning system suitable for small radius turning according to claim 1, characterized in that: The transition assembly (24) is welded from section steel and steel plates.

10. The plank road laying machine turning system suitable for small radius turning according to claim 1, characterized in that: A slewing bearing connection structure is provided on the top of the chassis assembly (4).

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