A method for automatically passing through a track complex structure area and a frame structure

Abstract

A method and frame structure for automatically traversing complex track structures. By limiting the displacement-wheel diameter relationship of elastic wheels, the geometric conditions for traversing rail discontinuities in the hazardous frog space are met. This method features a simple structure and automated operation. A traveling frame with dual elastic limiters with front and rear spans is also provided, ensuring that a limiter is always in effect within the hazardous frog space rail discontinuities, maintaining the equipment's posture.

Description

Technical Field

[0001] The present invention relates to the technical field of track detection, and in particular to a method for automatically passing through a track area with complex structures and a frame structure. Background Art

[0002] In order to ensure the safety of railway operations, my country's railways use a large number of hand-pushed inspection trolleys to detect the service status of railway equipment. In actual application, the inspection trolley must meet two conditions: one is to ensure continuous movement on the track to achieve efficient detection; the other is to maintain a stable posture during movement so that the sensors carried on it can stably collect data and ensure detection accuracy. In order to ensure measurement accuracy, conventional trolleys usually have a spring tensioning mechanism on the frame structure to limit the lateral displacement of the car body on the track. However, the railway track structure is complex, and the conventional trolley frame structure can only pass through the line where the rail is continuous. When pushing in the rail switching area, due to the discontinuity of the rail, the tensioning device will be stuck in the open area, causing the car body to be unable to move normally. The present invention proposes a frame design method and structure that can take into account both the passability of the equipment and the measurement accuracy, so that the inspection trolley can smoothly pass through the track area where the rail is discontinuous. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention designs an automated method and structure for ensuring that a track inspection trolley smoothly passes through a discontinuous area of a track.

[0004] (1) Find a method to automatically resolve the problem of conventional tensioning devices blocking passage in the open area of the rail.

[0005] (2) Find a way to automatically switch to the correct track in the dual-track transition area.

[0006] (3) Find a method to maintain the vehicle posture when passing through the open area of the track to ensure measurement accuracy.

[0007] The specific technical solutions are as follows:

[0008] A method for automatically passing through a track complex structure area, characterized in that it is applied to a track inspection trolley, the track inspection trolley includes a frame, running wheels, and an elastic limiting device, the elastic limiting device includes a fixed limiting wheel and an elastic limiting wheel; the running wheels are mounted on both sides of the frame, and the running wheels on both sides are limited by the fixed limiting wheel and the elastic limiting wheel respectively to maintain their relative position with the rail; the elastic limiting wheel and the vehicle body can move relative to each other in the lateral direction, and the fixed limiting wheel and the elastic limiting wheel are both pressed against the inner side of the rail by elastic force to keep the vehicle body posture stable; the track complex structure area is a region where the harmful space of the frog is discontinuous;

[0009] The method comprises:

[0010] In the tensioned state, the tension force F is greater than the friction force f between the wheel and the rail surface. The tension force pushes the car body to move laterally, and eventually the limiting wheels on both sides are pressed against the inner side of the rail, keeping the car body posture stable.

[0011] The frog is composed of wing rails and heart rails. The heart rail and wing rails are collinear but not connected, forming a discontinuous area:

[0012] The diameter of the elastic limiting wheel is smaller than the center rail wheel flange groove d, and the maximum transverse dimension of the elastic limiting device is D max Smaller than the sum of the track gauge and the radius of the elastic limiting wheel; at the same time, the maximum transverse dimension of the elastic limiting device is larger than the track gauge L;

[0013] When the elastic limiting wheel passes through the discontinuous area of the frog, the tip of the heart rail contacts the elastic limiting wheel to generate a lateral restoring force, thereby enabling the elastic limiting wheel to smoothly pass through the discontinuous track area of the rail member.

[0014] Furthermore, on the same side of the rail, a pair of elastic limit assemblies including two elastic limit devices are arranged in the front and rear, and the longitudinal span H of the two elastic limit devices in the assembly along the direction of the rail is greater than the length h of the open area of the rail; when one limiting wheel enters the open area and cannot obtain tensioning force, the other tensioning wheel contacts the rail to provide tensioning force, thereby realizing continuous effectiveness of the tensioning force.

[0015] Furthermore, a dual-degree-of-freedom structure is adopted, and the two elastic limiting devices are independent of each other.

[0016] Furthermore, a single degree of freedom structure is adopted, and the front and rear elastic limit devices are linked in lateral displacement.

[0017] Furthermore, when a single elastic limit device provides tension, there is a torque M=F*H / 2, and the car body has a tendency to twist in the horizontal plane. In order to suppress the twisting, a double wheelset limit device is designed, the wheelset spacing is a, and the spacing between the two diagonal wheels is L'. When the car body is against the rail, the track gauge is L1, L1=L'; if the car body twists, the track spacing on the line connecting the two diagonal wheels is reduced to L2, L2<L'. At this time, the diagonal wheel spacing L' limits the twisting of the car body.

[0018] A frame structure adopting the above method includes a frame, running wheels, and an elastic limiting device, wherein the elastic limiting device includes a fixed limiting wheel and an elastic limiting wheel; the running wheels are installed on both sides of the frame, and the running wheels on both sides are limited by the fixed limiting wheel and the elastic limiting wheel respectively to maintain their relative position with the rails; the elastic limiting wheel and the vehicle body can move relative to each other in the horizontal direction, and through elastic force, the fixed limiting wheel and the elastic limiting wheel are both pressed against the inner side of the rail, both sides of the vehicle body are tensioned, and the vehicle body enters a normal pushing state.

[0019] Furthermore, the elastic limiting device also includes a main wheel seat, a spring shaft, an elastic limiting wheel seat, a spring, a guide shaft, a rotating shaft and a handle. The main wheel seat is fixedly connected to the vehicle body and has a rectangular spring installed inside. The limiting wheel seat is fixedly connected to the spring shaft. When the handle is pressed, the spring shaft is pushed to the left, the rectangular spring is compressed, and the limiting wheel moves away from the inner side of the rail. When the handle is released, the spring rebounds, pushing the spring shaft to the right until the limiting wheel is close to the inner side of the rail. At this time, the other end of the spring generates an opposite force to push the main wheel seat to the left. Since the main wheel seat is fixedly connected to the vehicle body, the entire vehicle body is also pushed to the left, so that the fixed limiting wheel on the left side of the vehicle body is close to the left rail.

[0020] Furthermore, two sets of elastic limit devices are installed on the same side of the rail with a certain span.

[0021] The present invention has the following advantages due to the adoption of the above technical solution:

[0022] An elastic limiting method was designed to meet the geometric conditions for passing through rail discontinuities in harmful frog spaces by limiting the elastic wheel displacement-wheel diameter combination. The dimensions of the elastic limiting wheel are designed to allow for free movement within the wheel flange groove, which is smaller than the design value of the center rail wheel flange groove. The maximum lateral dimension of the elastic limiting device is smaller than the sum of the track gauge and the radius of the elastic limiting wheel. This ensures that when the elastic limiting wheel contacts the tip of the center rail, the angle between the center rail tip and the center wheel of the elastic limiting wheel and the direction of travel is a positive acute angle. This creates a lateral restoring force when the elastic limiting wheel contacts the tip of the center rail, allowing it to smoothly pass through the track discontinuity. Furthermore, the maximum lateral dimension of the elastic limiting device is larger than the track gauge. Simultaneously, when tensioned, the tensioning force F is greater than the friction force f between the wheel and the rail surface. This force pushes the vehicle body to lateral displacement, ultimately causing both limiting wheels to abut against the inner side of the rail, maintaining vehicle stability. Moreover, the above-mentioned dimensions are not a fixed quantity, but multiple variables. As long as the dimensional relationship between the variables is satisfied, continuous passing can be achieved, which has the characteristics of simple structure and automation.

[0023] A traveling frame with double elastic limit devices with front and rear spans is designed to ensure that an effective limit device always works in the rail discontinuity area of the harmful space of the frog to maintain the equipment posture. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a geometric relationship diagram of the frog-elastic limiter device of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the elastic limiting assembly of the present invention;

[0026] Figure 3 Schematic diagram of the vehicle body torsion restriction form of the present invention;

[0027] Figure 4 This is a front view of the elastic limiting device structure of the present invention;

[0028] Figure 5 This is a cross-sectional view of the structure of the elastic limiting device of the present invention;

[0029] Figure 6 This is a view of the inner side of the rail of the elastic limit device of the present invention;

[0030] Figure 7 It is a structural diagram of the frame of the present invention;

[0031] Reference numerals:

[0032] Elastic limiting wheel 11, fixed limiting wheel 12, walking wheel 13, frame 14, main wheel seat 15, spring shaft 16, elastic limiting wheel seat 17, rectangular spring 18, rotating shaft 19, handle 191, wing rail 21, heart rail 22. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] The present invention relates to a method for automatically passing through a track complex structure area, which is applied to a track inspection trolley. The track inspection trolley includes a frame 14, running wheels 13, and an elastic limiting device. The elastic limiting device includes a fixed limiting wheel 12 and an elastic limiting wheel 11. The running wheels 13 are installed on both sides of the frame 14. The running wheels 13 on both sides are limited by the fixed limiting wheel 12 and the elastic limiting wheel 11 respectively to maintain their relative positions with the rails. The elastic limiting wheel 11 and the vehicle body can move relative to each other in the lateral direction, and the fixed limiting wheel 12 and the elastic limiting wheel 11 are both pressed against the inner side of the rail by elastic force, and both sides of the vehicle body are tensioned to maintain the vehicle body posture stable. The track complex structure area is a region where the harmful space of the frog is discontinuous.

[0036] The method comprises:

[0037] In the tensioned state, the tension force F is greater than the friction force f between the wheel and the rail surface. The tension force pushes the car body to move laterally, and eventually the limiting wheels on both sides are pressed against the inner side of the rail, keeping the car body posture stable.

[0038] The frog is composed of wing rails 21 and heart rails 22. The heart rails 22 and wing rails 21 are collinear but not connected, forming a discontinuous area:

[0039] The diameter of the elastic limiting wheel 11 is smaller than the wheel rim groove d of the center rail 22, and the maximum transverse dimension D of the elastic limiting device is max Smaller than the sum of the track gauge and the radius of the elastic limiting wheel; at the same time, the maximum transverse dimension of the elastic limiting device is larger than the track gauge L;

[0040] By the design of the above dimensions, the elastic limiting wheel can first move freely in the wheel flange groove, which is smaller than the design value of the heart rail wheel flange groove. The maximum lateral dimension of the elastic limiting device is smaller than the sum of the track gauge and the radius of the elastic limiting wheel, which ensures that when the elastic limiting wheel passes through the discontinuous area, when the elastic limiting wheel contacts the tip of the heart rail, the angle between the line connecting the tip of the heart rail and the center of the elastic limiting wheel and the direction of travel is a positive acute angle, so that the tip of the heart rail contacts the elastic limiting wheel to generate a lateral restoring force, so that the elastic limiting wheel can smoothly pass through the track area where the rail is discontinuous; and the maximum lateral dimension of the elastic limiting device is larger than the track gauge. At the same time, in the tensioned state, the tensioning force F is larger than the friction force f between the wheel and the rail surface. The tensioning force pushes the vehicle body to move laterally, and finally makes the limiting wheels on both sides stick to the inner side of the rail to keep the vehicle body posture stable.

[0041] On the same side of the rail, a pair of elastic limiter assemblies, each consisting of two elastic limiters, are installed front and rear. The longitudinal span H of the two elastic limiters along the rail is greater than the length h of the rail's open area. When one limiter wheel enters the open area and loses tension, the other tensioner wheel engages the rail to provide tension, ensuring continuous tension and ensuring measurement accuracy throughout the entire process.

[0042] Two options are available:

[0043] ① The two elastic limit devices in the front and rear of the dual-degree-of-freedom scheme are independent; the dual-degree-of-freedom structure is as follows Figure 2 As shown, it is equivalent to connecting the front and rear rail trolleys together through a connecting rod. Each rail trolley has an elastic limit device, and the two elastic limit devices are independent of each other to form a double-degree-of-freedom structure.

[0044] ② Single degree of freedom scheme: two elastic limit devices at the front and rear are linked in lateral displacement; Single degree of freedom scheme, such as Figure 2The front and rear left elastic limiting devices shown on the right are connected by a connecting rod, and the front and rear right fixed limiting wheels are connected by a connecting rod, and then the two connecting rods are connected by a transverse connecting rod to form a single degree of freedom structure, that is, when one elastic limiting device changes, the other elastic limiting device will also be linked. At this time, it is not necessary to meet the geometric relationship that the maximum transverse dimension of the elastic limiting device is less than the sum of the track gauge and the radius of the elastic limiting wheel, because the overall structure can meet the requirement that when the elastic limiting wheel contacts the tip of the heart rail, the angle between the line connecting the center of the heart rail and the elastic limiting wheel and the direction of travel is a positive acute angle, so that the tip of the heart rail contacts the elastic limiting wheel to generate a lateral restoring force, so that the elastic limiting wheel can smoothly pass through the track area where the rail is discontinuous.

[0045] Furthermore, when a single elastic limiting device provides tension, there is a torque M = F * H / 2, and the vehicle body has a torsional tendency in the horizontal plane. Figure 3 Left figure. To suppress torsion, a double wheelset limiting device is designed. The wheelset spacing is a, and the diagonal distance between the two wheels is L'. Figure 3 Right. When the car body is against the rails, the track gauge is L1, where L1 = L'. If the car body twists, the track spacing along the line connecting the two diagonal wheels decreases to L2, where L2 < L'. In this case, the diagonal wheel spacing L' limits the car body twisting.

[0046] A frame structure with an elastic limiting function is also provided, such as the front view and cross-sectional view of the elastic wheel mechanism. The main wheel seat 15 is fixedly connected to the vehicle body and contains a rectangular spring 18. The limiting main wheel seat 15 is fixedly connected to the spring shaft 16. When the handle 191 is pressed, the spring shaft 16 is pushed to the left, the rectangular spring 18 is compressed, and the limiting wheel moves away from the inside of the rail. When the handle is released, the spring 18 rebounds, pushing the spring shaft 16 to the right until the limiting wheel is close to the inside of the rail. At this time, the other end of the spring 18 generates an opposing force to push the main wheel seat 15 to the left. Since the main wheel seat 15 is fixedly connected to the vehicle body, the entire vehicle body is also pushed to the left, causing the fixed limiting wheel 12 on the left side of the vehicle body to press against the left rail. This state can be maintained during the pushing of the vehicle.

[0047] This invention employs an elastic limiting method that, by limiting the displacement-wheel diameter relationship, satisfies the geometric requirements for passage through the rail discontinuity region in the frog's hazardous space. This method features a simple structure and automated operation. A traveling carriage with dual elastic limiting devices, with front and rear spans, ensures that a limiting device remains in place within the frog's hazardous space, maintaining the machine's position.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for automatically passing through a track complex structure area, characterized in that: Applicable to a track inspection trolley, the track inspection trolley includes a frame, running wheels, and an elastic limiting device, wherein the elastic limiting device includes a fixed limiting wheel and an elastic limiting wheel; the running wheels are mounted on both sides of the frame, and the running wheels on both sides are limited by the fixed limiting wheel and the elastic limiting wheel respectively to maintain their relative position with the rail; the elastic limiting wheel and the vehicle body can move relative to each other in the lateral direction, and the elastic force makes the fixed limiting wheel and the elastic limiting wheel both close to the inner side of the rail to maintain the stability of the vehicle body; the track complex structure area is the area where the frog is harmful and the rail is discontinuous; The method comprises: In the tensioned state, the tension force F is greater than the friction force f between the wheel and the rail surface. The tension force pushes the car body to move laterally, and eventually the limiting wheels on both sides are pressed against the inner side of the rail, keeping the car body posture stable. The frog is composed of wing rails and heart rails. The heart rail and wing rails are collinear but not connected, forming a discontinuous area: The diameter of the elastic limiting wheel is smaller than the center rail wheel flange groove d, and the maximum transverse dimension of the elastic limiting device is D max Smaller than the sum of the track gauge and the radius of the elastic limiting wheel; at the same time, the maximum transverse dimension of the elastic limiting device is larger than the track gauge L; When the elastic limiting wheel passes through the discontinuous area of the frog, when the elastic limiting wheel contacts the tip of the heart rail, the angle between the line connecting the tip of the heart rail and the center of the elastic limiting wheel and the traveling direction is a positive acute angle. The contact between the tip of the heart rail and the elastic limiting wheel generates a lateral restoring force, thereby allowing the elastic limiting wheel to smoothly pass through the track area with discontinuity of the rail member; On the same side of the rail, a pair of elastic limiter assemblies, each containing two elastic limiters, are provided front and rear. The longitudinal span H of the two elastic limiters along the rail is greater than the length h of the rail's open area. When one limiter wheel enters the open area and fails to obtain tension, the other tensioner wheel contacts the rail to provide tension, achieving continuous tension. A dual-degree-of-freedom structure is adopted, and the two elastic limit devices are independent of each other; When a single elastic limit device provides tension, there is a torque M = F * H / 2, and the car body has a tendency to twist in the horizontal plane. To suppress the twisting, a double wheelset limit device is designed. The wheelset spacing is a, and the spacing between the two diagonal wheels is L'. When the car body is in contact with the rail, L' = L1; if the car body is twisted by M, then L' = L2, L2 < L1. At this time, the elastic force of the elastic device increases, causing the device to tend to return to the L1 state, limiting the twisting of the car body.

2. A frame structure using the method for automatically passing through a track complex structure area as claimed in claim 1, characterized in that: It includes a frame, running wheels, and an elastic limiting device, wherein the elastic limiting device includes a fixed limiting wheel and an elastic limiting wheel; the running wheels are installed on both sides of the frame, and the running wheels on both sides are limited by the fixed limiting wheel and the elastic limiting wheel respectively to maintain their relative position with the rail; the elastic limiting wheel and the vehicle body can move relative to each other in the horizontal direction, and the elastic force makes the fixed limiting wheel and the elastic limiting wheel both close to the inner side of the rail, and both sides of the vehicle body are tensioned to keep the vehicle body posture stable.

3. The frame structure according to claim 2, wherein: The elastic limiting device also includes a main wheel seat, a spring shaft, an elastic limiting wheel seat, a spring, a guide shaft, a rotating shaft and a handle. The main wheel seat is fixedly connected to the vehicle body and has a rectangular spring installed therein. The limiting wheel seat is fixedly connected to the spring shaft. When the handle is pressed, the spring shaft is pushed to the left, the rectangular spring is compressed, and the limiting wheel moves away from the inner side of the rail. When the handle is released, the spring rebounds, pushing the spring shaft to the right until the limiting wheel is close to the inner side of the rail. At this time, the other end of the spring generates an opposite force to push the main wheel seat to the left. Since the main wheel seat is fixedly connected to the vehicle body, the entire vehicle body is also pushed to the left, so that the fixed limiting wheel on the left side of the vehicle body is close to the left rail.

4. The frame structure according to claim 2, wherein: On the same side of the rail, two sets of elastic limit devices are installed with a certain span.

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