A track inspection mechanism and a track inspection trolley

Abstract

The present invention provides a track inspection mechanism and a track inspection trolley. The track inspection mechanism includes traveling wheels that travel on the rail surface, as well as an independently provided lateral tensioning assembly and a track measurement assembly. The lateral tensioning assembly includes a movable tensioning wheel that abuts against the side of the rail, and a first tension spring connected to the movable tensioning wheel. The movable tensioning wheel tensions the side of the rail under the action of the elastic tension force provided by the first tension spring. The track measurement assembly is a contact type gauge measurement assembly or a non-contact type gauge measurement assembly. By providing an independently arranged lateral tensioning assembly and a track measurement assembly, the present invention effectively solves the problem of contradiction in selecting the tension force existing in the prior art due to the common use of a set of mechanisms for track tensioning and track measurement.

Description

Technical Field

[0001] The present invention relates to the technical field of track detection, and particularly relates to a track inspection mechanism and a track inspection trolley. Background Art

[0002] With the rapid development of China's railway industry, the operating speed of trains has been continuously increasing, and the accuracy requirements for the measurement and control of railway track geometric parameters are also getting higher and higher.

[0003] Typical digital precise measurement solutions for railway track geometric parameters are track inspection instruments and track measuring instruments. Both are measurement trolleys that move along railway tracks and can work in continuous measurement or fixed-point measurement modes. The gauge of railway tracks is one of their main measurement items. The common feature of their gauge measurement mechanisms is a lateral telescopic movement mechanism with elastic tension. The role of the elastic tension is to drive the lateral measurement wheel systems on the left and right sides of the measurement trolley to open outwards and always keep in close contact with the inner working edges of the left and right tracks to maintain the lateral movement attitude of the measurement trolley. Thus, the movement amount of this telescopic movement mechanism can be measured by a high-precision displacement sensor and converted into the measurement result of the railway track gauge.

[0004] In order to enable the measurement trolley to always stably maintain its lateral measurement attitude during the movement along the rail, a sufficiently large elastic tension must be available. However, for the gauge measurement mechanism, this elastic tension is the gauge measurement force, and the gauge measurement force must be strictly controlled to reduce the Abbe error during the measurement process. Therefore, when selecting the lateral elastic tension for the existing gauge measurement mechanisms of track measurement trolleys, there is a contradiction that a larger tension must be selected to maintain the lateral measurement attitude while a smaller tension must be selected to reduce the measurement error. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a track inspection mechanism and a track inspection trolley to solve the technical problem that when selecting the lateral elastic tension, there is a contradiction that a larger tension must be selected to maintain the lateral measurement attitude while a smaller tension must be selected to reduce the measurement error.

[0006] According to an embodiment of the present invention, a track inspection mechanism includes traveling wheels that travel on the rail surface, and an independently provided lateral tensioning assembly and a track measurement assembly. The lateral tensioning assembly includes a movable tensioning wheel that abuts against the side of the rail, and a first tension spring connected to the movable tensioning wheel. The movable tensioning wheel tensions the side of the rail under the action of the elastic tension provided by the first tension spring. The track measurement assembly is a contact-type gauge measurement assembly or a non-contact-type gauge measurement assembly.

[0007] Further, the contact type gauge measurement assembly includes a measurement wheel abutting against the side surface of the rail, a second tension spring connected to the measurement wheel, and a displacement sensor for detecting the displacement of the measurement wheel. The measurement wheel is closely attached to the side surface of the rail under the action of the elastic tension force provided by the second tension spring.

[0008] Further, the elastic tension force provided by the second tension spring is less than the elastic tension force provided by the first tension spring.

[0009] Further, the non-contact type gauge measurement assembly includes a distance sensor disposed opposite to the side surface of the rail.

[0010] Further, the number of the lateral tension assemblies is two, and the two lateral tension assemblies are symmetrically disposed on both sides of the track measurement assembly along a direction perpendicular to the thrust direction of the second tension spring.

[0011] Further, the traveling wheel is disposed on a traveling wheel support, and the lateral tension assembly further includes a first guide shaft and a first guide shaft support. The movable tension wheel is disposed on the traveling wheel support. One end of the first guide shaft is connected to the traveling wheel support, and the other end is movably inserted through the first guide shaft support. The first tension spring is sleeved on the first guide shaft, and one end abuts against the traveling wheel support and the other end abuts against the first guide shaft support.

[0012] Further, the contact type gauge measurement assembly further includes a second guide shaft and a second guide shaft support. One end of the second guide shaft is connected to the measurement wheel through a connecting block, and the other end is movably inserted through the second guide shaft support and connected to the displacement sensor.

[0013] Further, the second tension spring is sleeved on the second guide shaft, and one end abuts against the connecting block and the other end abuts against the second guide shaft support; or

[0014] One end of the second tension spring is connected to the traveling wheel support, and the other end is connected to the connecting block.

[0015] An embodiment of the present invention further provides a track inspection trolley, including a beam body, and further including at least one of the above track inspection mechanisms, and the track inspection mechanism is disposed on the beam body.

[0016] Further, the number of the track inspection mechanisms is one. The beam body includes a main beam and a side arm disposed at one end of the main beam. The track inspection mechanism is disposed at an end of the main beam away from the side arm, and fixed wheel sets are respectively disposed at both ends of the side arm.

[0017] Compared with the prior art, by providing independent lateral tensioning components and track measurement components, a set of independent lateral tensioning components is used to tension the side of the rail to maintain the measurement attitude of the track inspection trolley, and another set of independent track measurement components is used to detect the track. When selecting the elastic tension force, the lateral tensioning components select a larger tension force to maintain the measurement attitude, while the track measurement components can select a smaller tension force (contact type) or no elastic tension force (non-contact type) according to their own needs to ensure the measurement accuracy. Thus, the problem of contradiction in selecting the tension force caused by the existing common mechanism for track tensioning and track measurement is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The front view structural schematic diagram of the track inspection mechanism in the first embodiment of the present invention;

[0019] Figure 2 The top view structural schematic diagram of the track inspection mechanism in the first embodiment of the present invention;

[0020] Figure 3 The bottom view structural schematic diagram of the lateral tensioning component in the first embodiment of the present invention;

[0021] Figure 4 The front view structural schematic diagram of the contact type gauge measurement component in the first embodiment of the present invention;

[0022] Figure 5 The bottom view structural schematic diagram of the contact type gauge measurement component in the first embodiment of the present invention;

[0023] Figure 6 The front view structural schematic diagram of the contact type gauge measurement component in the second embodiment of the present invention;

[0024] Figure 7 The top view structural schematic diagram of the track inspection trolley in the third embodiment of the present invention;

[0025] Figure 8 The front view structural schematic diagram of the track inspection trolley in the third embodiment of the present invention.

[0026] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION OF THE INVENTION

[0027] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] Please refer to Figures 1 to 5 , which shows the track inspection mechanism 10 in the first embodiment of the present invention, including a walking wheel support 11, a walking wheel 12 disposed on the walking wheel support 11 and walking on the rail surface (the top surface of the rail), and an independently provided lateral tensioning assembly 13 and a track measuring assembly. In this embodiment, the track measuring assembly is specifically a contact type gauge measuring assembly 14.

[0031] Among them, the lateral tensioning assembly 13 includes a movable tensioning wheel 131 that abuts against the side of the rail and walks, and a first tension spring 132 connected to the movable tensioning wheel 131. The movable tensioning wheel 131 is always tensioned against the side of the rail under the action of the elastic tension force provided by the first tension spring 132. More specifically, the lateral tensioning assembly 13 further includes a first guide shaft 133 and a first guide shaft support 134. The movable tensioning wheel 131 is disposed on the walking wheel support 11. One end of the first guide shaft 133 is connected to the walking wheel support 11, and the other end movably passes through the first guide shaft support 134. The first tension spring 132 is sleeved on the first guide shaft 133, and one end abuts against the walking wheel support 11 and the other end abuts against the first guide shaft support 134. That is, the elastic tension force of the first tension spring 132 acts on the movable tensioning wheel 131 through the walking wheel support 11, and also acts on the walking wheel 12, so that the movable tensioning wheel 131, the walking wheel 12, the first guide shaft 133 and the walking wheel support 11 can move horizontally (perpendicular to the direction of the rail) together.

[0032] Among them, the contact type gauge measurement component 14 includes a measurement wheel 141 that travels against the side surface of the rail, a second tension spring 142 connected to the measurement wheel 141, and a displacement sensor 143 that detects the displacement of the measurement wheel 141. The measurement wheel 141 is pressed against the side surface of the rail under the action of the elastic tension force provided by the second tension spring 142. More specifically, the track measurement component 14 further includes a second guide shaft 144 and a second guide shaft support 145. One end of the second guide shaft 144 is connected to the measurement wheel 141 through a connecting block 146. The measurement wheel 141 is located below the second guide shaft 144. The other end of the second guide shaft 144 is movably inserted through the second guide shaft support 145 and connected to the displacement sensor 143. The second tension spring 142 is sleeved on the second guide shaft 144, and one end abuts against the connecting block 146 and the other end abuts against the second guide shaft support 145. That is, the elastic tension force of the second tension spring 142 acts on the measurement wheel 141 through the connecting block 146, so that the measurement wheel 141, the connecting block 146, and the second guide shaft 144 can move horizontally and telescopically together. Therefore, the horizontal telescopic movement of the contact type gauge measurement component 14 and the horizontal telescopic movement of the horizontal tensioning component 13 are independent of each other and do not affect each other, belonging to two completely independent horizontal telescopic movement modules.

[0033] In addition, as Figure 2 and Figure 5 shown, in this embodiment, the number of the second guide shafts 144 and the second tension springs 142 is two. Each second guide shaft 144 is sleeved with a second tension spring 142. The two second guide shafts 144 share a second guide shaft support 145, and the two second guide shafts 144 are simultaneously connected to the displacement sensor 143. That is, this embodiment uses double springs to tension the measurement wheel 141, making the measurement wheel 141 more stable when moving horizontally and improving the measurement accuracy. Of course, the present invention is not limited thereto. In other embodiments, the number of the second tension springs 142 can also be one or more, and the number of the second guide shafts 144 corresponds to it.

[0034] It should be noted that by sleeving the first tension spring 132 on the first guide shaft 133, the elastic tension force of the first tension spring 132 is guided to ensure that the elastic tension force of the first tension spring 132 always acts on the movable tensioning wheel 131 in the specified direction, improving the tensioning stability. Similarly, by sleeving the second tension spring 142 on the second guide shaft 144, the elastic tension force of the second tension spring 142 is guided to ensure that the elastic tension force of the second tension spring 142 always acts on the measurement wheel 141 in the specified direction, improving the measurement stability and accuracy.

[0035] Among them, the displacement sensor 143 is specifically a linear displacement sensor. Since the lateral displacement of the measuring wheel 141 is equal to the lateral displacement of the second guide shaft 144, when the gauge changes, the measuring wheel 141 will make a lateral displacement to adapt to the gauge change. At this time, the second guide shaft 144 will follow the measuring wheel 141 to make the same lateral displacement. Since the second guide shaft 144 is connected to the displacement sensor 143, the lateral displacement of the second guide shaft 144 is detected by the displacement sensor 143, so that the displacement sensor 143 detects the lateral displacement of the measuring wheel 141, obtains the gauge change amount, and further measures the gauge of the rail.

[0036] It should be noted that, as Figures 1 - 5 shown, in actual use, the first guide shaft support 134 needs to be fixed to the beam body 20 of the track inspection trolley. Similarly, the second guide shaft support 145 also needs to be fixed to the beam body 20 of the track inspection trolley to fix the entire track inspection mechanism 10 on the beam body of the track inspection trolley. Among them, the first guide shaft support 134 and the second guide shaft support 145 can be the same support or different supports, that is, the first guide shaft support 134 and the second guide shaft support 145 can share a support or can respectively adopt separate supports.

[0037] In addition, preferably, the elastic tension force provided by the second tension spring 142 is less than the elastic tension force provided by the first tension spring 132. Specifically, the first tension spring 132 can adopt a spring with a larger elastic coefficient to provide a larger tension force to the movable tension wheel 131 to maintain the measurement attitude; the second tension spring 142 can adopt a spring with a smaller elastic coefficient to provide a smaller tension force to the movable tension wheel 131 to ensure the measurement accuracy. By way of example and not limitation, as an alternative embodiment, the tension force received by the movable tension wheel 131 should be greater than or equal to 200N, and the tension force received by the measuring wheel should be less than or equal to 20N.

[0038] In order to better ensure the attitude of the track inspection trolley and improve the measurement accuracy, two lateral tension components 13 are provided in the track inspection mechanism 10 of this embodiment. The two lateral tension components 13 are symmetrically arranged on the front and rear sides of the track measurement component 14 along the direction perpendicular to the thrust of the second tension spring 142 (along the rail direction). And preferably, the track measurement component 14 is coaxially arranged with the beam body of the track inspection trolley, that is, based on the axis of the beam body of the track inspection trolley, the track measurement component 14 is arranged in the middle, and the two lateral tension components 13 are symmetrically distributed on the front and rear sides of the track measurement component 14. In this way, the track measuring wheel 141 system is in the middle, and a set of independent lateral tension components 13 are respectively used on both sides to ensure the pose, so as to better ensure the attitude of the track inspection trolley and improve the measurement accuracy.

[0039] In addition, in some other alternative embodiments, the track measurement component may also be a non-contact gauge measurement component. Specifically, the non-contact gauge measurement component may include a distance sensor (not shown in the figure) disposed opposite to the side of the rail. During specific implementation, the distance sensor may also be fixedly disposed on the first guide shaft support, the second guide shaft support, or the beam of the track inspection vehicle through a connecting block, and is used to sense the distance from itself to the side of the rail, so as to measure the change amount of the gauge, and further measure the gauge.

[0040] In summary, for the track inspection mechanism 10 in this embodiment, by providing an independent lateral tensioning component 13 and a track measurement component 14, a set of independent lateral tensioning component 13 is used to tension the side of the rail to maintain the measurement attitude of the track inspection vehicle, and another set of independent track measurement component 14 is used to detect the track. When selecting the elastic tension force, the lateral tensioning component 13 selects a larger tension force to maintain the measurement attitude, while the track measurement component 14 can select a smaller tension force according to its own needs to ensure the measurement accuracy, thus effectively solving the problem of contradiction in selecting the tension force due to the common use of a set of mechanisms for track tensioning and track measurement in the prior art.

[0041] Please refer to Figure 6 , which shows the track inspection mechanism 10 in the second embodiment of the present invention. The difference between the track inspection mechanism 10 in this embodiment and the track inspection mechanism 10 in the first embodiment is as follows:

[0042] The arrangement manner of the second tension spring 142 is different from that in the first embodiment. Specifically, in this embodiment, the second tension spring 142 is a tension spring. One end of the second tension spring 142 is connected to the walking wheel support 11, and the other end is connected to the connecting block 146. That is, the tension force of the second tension spring 142 in the first embodiment is a thrust force, that is, pushing the measuring wheel 141 outward, while the tension force of the second tension spring 142 in this embodiment is a pulling force, that is, pulling the measuring wheel 141 outward, so that the measuring wheel 141 is always tensioned against the side of the rail.

[0043] In order to guide the second tension spring 142, a guide sleeve 111 is provided on the walking wheel support 11, and the second tension spring 142 is sleeved in the guide sleeve 111.

[0044] It should be noted that for the device provided in this embodiment, its implementation principle and the technical effects produced are the same as those of the first embodiment of the present invention. For the sake of brief description, for the parts not mentioned in this embodiment, reference may be made to the corresponding content in the first embodiment of the present invention.

[0045] On the other hand, the present invention also proposes a track inspection vehicle. Please refer to Figures 7 - 8, shown is a track inspection trolley in the third embodiment of the present invention, including a beam body 20 and a track inspection mechanism 10. The track inspection mechanism 10 is the track inspection mechanism 10 described in any one of the above first and second embodiments, where:

[0046] In this embodiment, the beam body 20 is a T-shaped beam. The beam body 20 specifically includes a main beam 21 and a side arm 22 provided at one end of the main beam 21. The main beam 21 and the side arm 22 are connected in a T shape. The track inspection mechanism 10 is provided at one end of the main beam 21 away from the side arm 22. Fixed wheel sets 30 are respectively provided at both ends of the side arm 22. Preferably, the track measurement assembly 14 of the track inspection mechanism 10 is arranged coaxially with the main beam 21, and the two lateral tensioning assemblies 13 of the track inspection mechanism 10 are symmetrically distributed on the front and rear sides of the track measurement assembly 14.

[0047] Among them, the fixed wheel set 30 includes a roller support 31 fixedly connected to the end of the side arm 22, a roller 32 provided on the roller support 31 and traveling on the rail surface, and a fixed tensioning wheel 33 provided on the roller support 31 of the roller 32 and tensioning the side of the rail. The fixed tensioning wheel 33 has the same function as the movable tensioning wheel 131, which is to tension the side of the rail and roll on the side of the rail to ensure the attitude of the track inspection trolley. The difference is that the movable tensioning wheel 131 can make a lateral telescopic movement, while the fixed tensioning wheel 33 cannot make a lateral telescopic movement. At the same time, the traveling wheels 12 and the rollers 32 also have the same function, which is to roll on the rail surface so that the track inspection trolley can be supported on the track and travel.

[0048] During actual use, as Figure 8 shown, when the beam body 20 is erected on the track, the track inspection mechanism 10 and the fixed wheel set 30 are respectively in contact with the left and right rails. At this time, the movable tensioning wheels 131 of the track inspection mechanism 10 are closely attached to the side of the rail and roll on the side of the rail along with the movement of the track inspection trolley. At the same time, the fixed tensioning wheels 33 of the fixed wheel set 30 also tension the side of the rail and roll on the side of the rail along with the movement of the track inspection trolley. Since there are tensioning wheels at both ends of the beam body 20 to tension the side of the rail, the lateral measurement attitude of the track inspection trolley is ensured. At the same time, the measurement wheels 141 of the track inspection mechanism 10 are also closely attached to the side of the rail and move on the side of the rail along with the movement of the track inspection trolley. The displacement sensor 143 senses the lateral displacement of the measurement wheels 141, thereby detecting the change amount of the gauge, and further measuring the gauge between the left and right rails.

[0049] It should be noted that the number of track inspection mechanisms 10 on the track inspection trolley is not limited to one. In other embodiments, multiple track inspection mechanisms 10 can also be provided on the track inspection trolley. For example, one track inspection mechanism 10 can be provided at both ends of the girder 21. In addition, the fixed tension wheels 33 at both ends of the side arm 22 can be changed to movable tension wheels. The implementation structure of the movable tension wheels is the same as that of the lateral tensioning assembly 13, so that the tension wheels on both sides of the track inspection trolley can be telescopically adjusted. In addition, in other embodiments, the beam body 20 can also be in an "H" shape or an "I" shape, that is, an H-shaped beam or an I-shaped beam can also be used. When the beam body 20 changes, the number and arrangement positions of the track inspection mechanisms 10 can also be adaptively adjusted according to actual needs.

[0050] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A track inspection mechanism, characterized in that, It includes running wheels that run on the rail surface, as well as independently provided lateral tensioning components and track measuring components. The lateral tensioning components include movable tensioning wheels that abut against the side of the rail, and first tensioning springs connected to the movable tensioning wheels. The movable tensioning wheels tension the side of the rail under the action of the elastic tensioning force provided by the first tensioning springs. The track measuring component is a contact type gauge measuring component; The contact type gauge measuring component includes measuring wheels that abut against the side of the rail, second tensioning springs connected to the measuring wheels, and displacement sensors that detect the displacement of the measuring wheels. The measuring wheels closely adhere to the side of the rail under the action of the elastic tensioning force provided by the second tensioning springs; The elastic tensioning force provided by the second tensioning springs is less than the elastic tensioning force provided by the first tensioning springs.

2. The track inspection mechanism according to claim 1, wherein The number of the lateral tensioning components is two, and the two lateral tensioning components are symmetrically arranged on both sides of the track measuring component along the direction perpendicular to the thrust of the second tensioning springs.

3. The track inspection mechanism according to claim 1, characterized in that, The running wheels are arranged on running wheel supports. The lateral tensioning components further include first guide shafts and first guide shaft supports. The movable tensioning wheels are arranged on the running wheel supports. One end of the first guide shaft is connected to the running wheel support, and the other end is movably inserted through the first guide shaft support. The first tensioning spring is sleeved on the first guide shaft, and one end abuts against the running wheel support and the other end abuts against the first guide shaft support.

4. The track inspection mechanism according to claim 3, characterized in that, The contact type gauge measuring component further includes second guide shafts and second guide shaft supports. One end of the second guide shaft is connected to the measuring wheel through a connecting block, and the other end is movably inserted through the second guide shaft support and connected to the displacement sensor.

5. The track inspection mechanism according to claim 4, characterized in that The second tensioning spring is sleeved on the second guide shaft, and one end abuts against the connecting block and the other end abuts against the second guide shaft support; or One end of the second tensioning spring is connected to the running wheel support, and the other end is connected to the connecting block.

6. A track inspection trolley, comprising a beam body, characterized in that, It further includes at least one track inspection mechanism according to any one of claims 1 to 5, and the track inspection mechanism is arranged on the beam body.

7. The track inspection trolley according to claim 6, characterized in that, The number of the track inspection mechanisms is one. The beam body includes a main beam and a side arm arranged at one end of the main beam. The track inspection mechanism is arranged at the end of the main beam far from the side arm, and fixed wheel sets are respectively arranged at both ends of the side arm.

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