Method for automatically passing through complex structure area of track and frame structure

Abstract

According to the method for automatically passing through the complex structure area of the track and the frame structure, the geometric condition of passing through the discontinuous area of rail pieces in the harmful space of a frog is met by limiting the displacement-wheel diameter combination relation of elastic wheels. The device has the characteristics of simple structure and automation. The invention further provides a double-elastic limiting device walking vehicle frame with spans in the front and the back, an effective working limiting device can be always guaranteed in a steel rail discontinuous area in a harmful space of a frog, and the posture of equipment is kept.

Description

Technical Field

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

[0002] In order to ensure the safety of railway operation, 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 walking on the track to achieve efficient detection; the other is to maintain a stable posture during walking so that the sensors carried on it can stably collect data and ensure detection accuracy. In order to ensure measurement accuracy, conventional trolleys usually set 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 on 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 passes smoothly through a discontinuous area of ​​a track member.

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

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

[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 comprises a frame, running wheels, and an elastic limiting device, the elastic limiting device comprises 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 fixed limiting wheels and elastic limiting wheels respectively to maintain the 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 through elastic force to keep the vehicle body stable; the track complex structure area is a discontinuous area of ​​harmful spatial rail parts of the frog;

[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 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 stable.

[0011] The frog is composed of wing rails and heart rails. The heart rail and wing rails are in the same line 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 lateral 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, and at the same time, the maximum lateral 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 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 the tensioning force, the other tensioning wheel contacts the rail to provide the tensioning force, thereby realizing the 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 tensioning force, 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, and L1=L'; if the car body twists, the track spacing on the line connecting the two diagonal wheels is reduced to L2, and 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 the relative position with the rail; the elastic limiting wheel and the vehicle body can move relative to each other in the lateral direction, and through the 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 move 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 at a certain span on the same side of the rail.

[0021] The present invention adopts the above technical solution, which has the following advantages:

[0022] An elastic limiting method is designed to meet the geometric conditions for passing through the discontinuous area of ​​the rail in the harmful space of the frog by limiting the displacement-wheel diameter combination relationship of the elastic wheel. Through the design of the size, the elastic limiting wheel can first move freely in the wheel flange groove, which is smaller than the design value of the wheel flange groove of the heart rail. The maximum lateral size 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 center line of the heart rail tip and the elastic limiting wheel and the travel direction is a positive acute angle, so that the contact between the tip of the heart rail and the elastic limiting wheel generates a lateral restoring force, so that the elastic limiting wheel smoothly passes through the track area with discontinuous rails; and the maximum lateral size 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, and the tensioning force pushes the vehicle body to move laterally, and finally makes the limiting wheels on both sides close to the inner side of the rail to keep the vehicle body stable. 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 It is a geometric relationship diagram of the frog-elastic limit device of the present invention;

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

[0026] Figure 3 It is a schematic diagram of the torsion restriction form of the vehicle body of the present invention;

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

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

[0029] Figure 6 This is an inner side view 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] An elastic limiting wheel 11, a fixed limiting wheel 12, a walking wheel 13, a vehicle frame 14, a main wheel seat 15, a spring shaft 16, an elastic limiting wheel seat 17, a rectangular spring 18, a rotating shaft 19, a handle 191, a wing rail 21, and a heart rail 22. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to 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, it indicates 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 comprises a frame 14, a running wheel 13, and an elastic limiting device, wherein the elastic limiting device comprises a fixed limiting wheel 12 and an elastic limiting wheel 11; the running wheel 13 is installed on both sides of the frame 14, and the running wheels 13 on both sides are limited by the fixed limiting wheel 12 and the elastic limiting wheel 11 respectively to maintain the relative position with the rail; 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 through elastic force, and both sides of the vehicle body are tensioned to keep the vehicle body posture stable; the track complex structure area is a discontinuous area of ​​harmful spatial rail parts of the frog;

[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 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 stable.

[0038] The frog is composed of a wing rail 21 and a heart rail 22. The heart rail 22 is in line with the wing rail 21 but is not connected to form 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 max Smaller than the sum of the track gauge and the radius of the elastic limiting wheel, and at the same time, the maximum lateral dimension of the elastic limiting device is larger than the track gauge L;

[0040] Through the design of the above dimensions, the elastic limiting wheel can first move freely in the wheel rim groove, which is smaller than the design value of the heart rail wheel rim 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 circle 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 smoothly passes through the discontinuous track area of ​​the rail member; 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 surface of the rail, and the tensioning force pushes the vehicle body to move laterally, and finally makes the limiting wheels on both sides close to the inner side of the rail to keep the vehicle body stable.

[0041] On the same side of the rail, a pair of elastic limiter assemblies including two elastic limiters are arranged in front and back, and the longitudinal span H of the two elastic limiters in the assembly along the rail direction is greater than the length h of the open area of ​​the rail. When one limiter wheel enters the open area and fails to obtain tension, the other tensioner wheel contacts the rail to provide tension, realizing the continuous effect of tension and ensuring measurement accuracy throughout the process.

[0042] Two options are available:

[0043] ① The two elastic limit devices at 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: the 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, 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 satisfy 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 satisfy 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 tip 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 track member is discontinuous.

[0045] Furthermore, when a single elastic limit 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 wheel set limiter is designed, with a wheel set spacing of a and a diagonal wheel spacing of L'. Figure 3 Right figure. When the car body is close to the rail, the track gauge is L1, L1 = L'. If the car body is twisted, 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.

[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 a rectangular spring 18 is installed inside. 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 is away from the inner side of the rail. When the handle is released, the spring 18 rebounds and pushes the spring shaft 16 to move 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 18 generates an opposite 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, so that the fixed limiting wheel 12 on the left side of the vehicle body is close to the left rail. This state can be maintained during the pushing process of the trolley.

[0047] The present invention designs an elastic limiting method, which satisfies the geometric conditions for passing through the rail discontinuity area of ​​the harmful space of the frog by limiting the elastic wheel displacement-wheel diameter combination relationship. It has the characteristics of simple structure and automation. A traveling frame with double elastic limiting devices with spans in front and back is designed, which can always ensure an effective limiting device in the rail discontinuity area of ​​the harmful space of the frog to maintain the posture of the equipment.

[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 embodiments of the present invention.

Claims

1. A method for automatically passing through a track complex structure area, characterized in that: Applied to a track inspection trolley, the track inspection trolley comprises a frame, running wheels, and an elastic limiting device, wherein the elastic limiting device comprises 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 the 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 maintain the stability of the vehicle body posture; the track complex structure area is the discontinuous area of ​​the harmful space rail of the frog; 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 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 stable. The frog is composed of wing rails and heart rails. The heart rail and wing rails are in the same line 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 lateral 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, and at the same time, the maximum lateral 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, 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.

2. The method for automatically passing through a track complex structure area as claimed in claim 1, characterized in that: On the same side of the rail, a pair of elastic limit assemblies including two elastic limit devices are arranged front and rear, and the longitudinal span H of the two elastic limit devices in the assembly along the rail direction is greater than the length h of the open area of ​​the rail; when one limiting wheel enters the open area and cannot obtain the tensioning force, the other tensioning wheel contacts the rail to provide the tensioning force, thereby realizing the continuous effectiveness of the tensioning force.

3. The method for automatically passing through a track complex structure area as claimed in claim 2, characterized in that: A double-degree-of-freedom structure is adopted, and the two elastic limiting devices are independent of each other.

4. The method for automatically passing through a track complex structure area as claimed in claim 2, characterized in that: It adopts a single degree of freedom structure, and the two front and rear elastic limit devices are linked in lateral displacement.

5. The method for automatically passing through a track complex structure area as claimed in claim 3, characterized in that: 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, with a wheelset spacing of a and a spacing of two diagonal wheels of L'. When the car body is against 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.

6. A frame structure using the method for automatically passing through a track complex structure area as described in any one of claims 1 to 5, 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 the 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 through elastic force, and both sides of the vehicle body are tensioned to keep the vehicle body posture stable.

7. The frame structure according to claim 6, characterized in that: 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 move rightward until the limiting wheel is pressed against 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 pressed against the left rail.

8. The frame structure according to claim 6, characterized in that: On the same side of the rail, two sets of elastic limit devices are installed with a certain span.

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