Vehicle body structure of rocket sled slide rail inspection tester

Abstract

The invention discloses a vehicle body structure of a rocket sled slide rail inspection tester, relates to the field of rocket sled slide rail detection equipment, and is used for improving the anti-vibration rigidity and the detection precision of a vehicle body. A frame of the vehicle body structure is in a T shape formed by longitudinal beams, cross beams and inclined supporting beams, the vibration resistance rigidity is improved, single-point measurement is achieved, the bottom of the frame is connected with a walking mechanism to walk on a sliding rail, a guide mechanism at the bottom of the frame plays a role in guiding and limiting walking, and the walking mechanism is connected with an encoder to achieve positioning of a detection point. And a sensor group for distance measurement and inclination angle measurement is mounted on the frame so as to detect parameters of the slide rail. The vehicle body structure has the advantages of being high in rigidity, good in guidance quality, convenient to disassemble and assemble and high in detection precision.

Description

Technical Field

[0001] The invention relates to the field of rocket sled slide rail inspection equipment, in particular to a body structure of a rocket sled slide rail inspection instrument. Background Art

[0002] The rocket sled test is a comprehensive test of high speed, high acceleration, high-speed airflow and some special environments on the rocket sled test rail, using a rocket-propelled sled to simulate high acceleration on the ground. The rocket sled test can accurately and as much as possible find the design and manufacturing defects of the equipment under test, and achieve the connection between the wind tunnel test and the flight test of the equipment under test. In view of the many advantages of the rocket sled test, the construction of the rocket sled rail has always been valued by various countries. Therefore, in order to ensure the smooth progress of the test, the rocket sled rail has extremely strict requirements on the deviation between the track and its designed position, especially the deviation requirements for the height and wheelbase of the rocket sled track are the most stringent, and the deviation accuracy is generally required to be less than 0.2mm. Related studies have shown that when the position deviation of the slide rail from the design straight line reaches ±0.2mm, the vibration load generated by the sled during operation will increase by 30%. Therefore, designing a geometric parameter measurement structure device that meets the measurement accuracy requirements of the rocket sled track is of great significance to improving the accuracy of the rocket sled test.

[0003] There are two main types of track inspection instruments at present. One is a thin-sheet structure, which uses a manual push method during measurement. However, the rigidity of this structure is poor and the measurement error is high. Another type of track inspection instrument uses an H-type box structure. Although this type of track inspection instrument has good structural rigidity, the H-type structure is more cumbersome and inconvenient to operate. In addition, due to the long wheelbase between the two wheels, it cannot meet the requirements of high-precision measurement of the rocket sled rail. When using a commercial track inspection instrument on the railway to measure the rocket sled track, it was found that its maximum accuracy was only 0.7mm, which could not meet the accuracy requirements of the rocket sled rail. In addition, when using a laser tracking measurement system to measure the geometric shape and position of the rocket sled track, not only is the amount of calculation large, but the measurement process is also complicated, which cannot meet the requirements of rapid measurement and adjustment of the rocket sled track. Summary of the invention

[0004] The object of the present invention is to provide a vehicle body structure of a rocket sled slide rail inspection instrument with strong vibration resistance and high measurement accuracy in order to address all or part of the above-mentioned problems.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A body structure of a rocket sled rail inspection instrument, comprising a frame, the frame being T-shaped and consisting of a longitudinal beam, a transverse beam and at least one diagonal bracing beam, the transverse beam vertically connecting the middle of the longitudinal beam, and the two ends of the diagonal bracing beam respectively connecting one end of the longitudinal beam and the middle of the transverse beam;

[0007] The bottom of the frame is connected with a walking mechanism and a guiding mechanism; the walking mechanism rolls on the upper surface of the rocket sled rails on both sides; the guiding mechanism adopts an elastic telescopic structure and rolls closely against the inner surface of the rocket sled rails on both sides;

[0008] The walking mechanism is connected with an encoder; the frame is equipped with a sensor group for measuring distance and tilt angle respectively.

[0009] Preferably, the walking mechanism is provided with main wheel assemblies at least at both ends of the longitudinal beam and at the end of the cross beam away from the longitudinal beam, and all the main wheel assemblies are in the same plane, which is parallel to the upper plane of the cross beam.

[0010] Furthermore, the main wheel group includes a main wheel and a wheel frame, the main wheel is connected to the wheel frame via a rotating shaft, and the wheel frame is connected to the frame; the rotating shaft of each main wheel group is parallel to the upper plane of the crossbeam.

[0011] Furthermore, the tread of the main wheel is wave-shaped.

[0012] Preferably, the guide mechanism includes at least two groups of first guide modules in rigid contact with the inner surface of the rocket sled slide rail on one side, and at least two groups of second guide modules in elastic contact with the inner surface of the rocket sled slide rail on the other side.

[0013] Furthermore, the second guide module includes a guide wheel and a bracket, the guide wheel is connected to a guide rod, the guide rod vertically passes through the bracket and is movably connected to the bracket, and the guide rod is connected to springs on both sides of the bracket; the bracket is connected to the frame.

[0014] Furthermore, a retracting device is connected to the bracket of the second guide module, and the retracting device is connected to the guide wheel. The guide wheel is controlled by the retracting device to be in a free state or a retracted state.

[0015] Preferably, the sensor group includes at least two groups of laser ranging sensors, and the two groups of laser ranging sensors are respectively connected to the two ends of the beam, and the two groups of laser ranging sensors are respectively facing the inner surfaces of the rocket sled rails on both sides.

[0016] Preferably, the sensor group includes at least two groups of inclination sensors, and the two groups of inclination sensors are symmetrically installed on two side surfaces of the beam that are perpendicular to the traveling direction.

[0017] Preferably, a traction connection device is connected to the frame, and the traction connection device includes a damper and universal joints respectively connected to both ends of the damper, and a spring is also connected between the middle part and the movable end of the damper.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. The vehicle body structure of the present invention adopts a T-shaped box structure as a whole, which not only has a large structural strength, but also has good structural rigidity. The vehicle body structure is not prone to geometric deformation, which improves the measurement accuracy of track geometric parameters and can achieve single-point detection. At the same time, by dividing the internal space of the box, it is convenient to classify and install parts or functional components, making the installation before measurement and the disassembly after measurement faster and simpler, improving work efficiency, and facilitating the passage of communication lines, power lines and other connecting lines when installing functional components, making the appearance more concise.

[0020] 2. Since the surface of the rocket sled rail is often stained with a lot of oil mud, if the main wheel has a large contact area with the rail surface, the main wheel surface will be stained with oil mud, affecting the measurement accuracy. The present invention designs the tread of the main wheel (i.e., the side in contact with the rail) to be wavy, which reduces the contact area between the main wheel and the rail surface, and can automatically squeeze the oil mud into the non-contact gap, reducing or avoiding the impact of the oil mud on the main wheel.

[0021] 3. The structures of the guide modules designed on both sides of the reference slide rail and the measuring slide rail of the present invention are different. The guide module on the reference slide rail side is designed to be in rigid contact with the inner surface of the slide rail, so that the data measured on the reference slide rail side always remains stable, and the data measured on the other side can directly reflect the condition of the measuring slide rail without conversion. In addition, the guide module on the measuring slide rail side is designed to be in elastic contact with the inner surface of the slide rail, so that no matter in which direction the measuring slide rail deviates, the guide module can always be close to the slide rail to prevent jamming during walking, and can also ensure that the guide module on the reference slide rail side is always close to the reference slide rail, which plays a role in precise positioning. In addition, the retraction device designed by the present invention does not constrain the second guide module when the inspection instrument is working, and when the inspection instrument needs to be separated from the slide rail after the inspection, it can easily retract the second guide module, thereby facilitating the removal of the inspection instrument from the slide rail.

[0022] 4. The vehicle body structure of the present invention allows manual pushing or towing by a rail tractor, and the designed traction connection device can achieve a soft connection between the tractor and the frame, thereby maximally eliminating the transmission of vibration caused by the traction process to the frame, while avoiding the danger that may be caused by the frame continuing to move forward due to inertia after traction stops. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0024] Figure 1 It is a structural diagram of a vehicle body structure in one embodiment.

[0025] Figure 2 It is a structural diagram of a vehicle frame in one embodiment.

[0026] Figure 3 It is a structural diagram of the main wheel assembly in one embodiment.

[0027] Figure 4 It is a structural diagram of the first guide module in one embodiment.

[0028] Figure 5 It is a structural diagram of the second guide module in one embodiment.

[0029] Figure 6 is a structural diagram of a traction connection device in one embodiment.

[0030] Figure 7 yes Figure 1 Bottom view of the vehicle body structure in an embodiment.

[0031] Figure 8 yes Figure 7 Schematic diagram of the installation structure of the second guide module in the embodiment. DETAILED DESCRIPTION

[0032] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0033] Any feature disclosed in this specification (including any additional claims and abstract), unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0034] Example 1

[0035] like Figure 1 As shown, an embodiment of the present application provides a vehicle body structure of a rocket sled rail inspection instrument.

[0036] In order to ensure the measurement accuracy of the rocket sled slide rail inspection instrument, the rocket sled slide rail inspection instrument must have good rigidity as a whole, and its overall structure cannot be deformed when the inspection instrument is working. In view of this basic requirement, the frame 1 of the vehicle body structure is designed as a T-shaped structure, such as Figure 2 As shown, the vehicle frame 1 is composed of a longitudinal beam 11, a cross beam 12 and two diagonal bracing beams 13 on both sides of the cross beam 12. The cross beam 12 is vertically connected to the middle of the longitudinal beam 11, and the two diagonal bracing beams 13 are respectively connected to the two ends of the longitudinal beam 11 from the middle of the left and right sides of the cross beam 12. Of course, the number of diagonal bracing beams 13 is not necessarily two, and can be one or more, the purpose is to strengthen the connection rigidity between the cross beam 12 and the longitudinal beam 11.

[0037] In some embodiments, the cross beam 12, the longitudinal beam 11 and the diagonal bracing beam 13 are all designed with hollow rectangular steel tubes. For example, in some specific embodiments, the longitudinal beam 11 has a size of 800 mm in length, 150 mm in width, and 100 mm in height, and adopts a rectangular hollow steel tube with a thickness of 5 mm, and end caps are designed on both end faces to close the hollow steel tube. The cross beam 12 has a size of 1520 mm in length, 200 mm in width, and 100 mm in height, and adopts a rectangular hollow steel tube with a thickness of 5 mm. An L-shaped plate is welded at one end for connection with the longitudinal beam 11. The two diagonal bracing beams 13 have a size of 825 mm in length, 100 mm in width, and 100 mm in height, and both adopt a rectangular hollow steel tube with a thickness of 5 mm. The two diagonal bracing beams 13 have a mirror symmetry. An L-shaped plate is also welded at one end of the diagonal bracing beam 13 for connection with the longitudinal beam 11, and a flat plate is welded at the other end for connection with the cross beam 12. The longitudinal beam 11, the cross beam 12 and the diagonal bracing beam 13 form a T-shaped structure as a whole, and are connected to each other by bolts to form the main structure of the frame 1. In addition, certain holes are opened on the frame 1 for the installation and fixation of various components to be measured, and the corresponding components are installed at the positions of the corresponding holes by bolts. In addition, the ends of the cross beam 12 and the longitudinal beam 11 are designed with openable end covers to facilitate the installation and removal of various components.

[0038] A traveling mechanism 2 is connected to the bottom of the frame 1, which supports the frame 1 on the rocket sled rails 5. Under the action of the driving force, the traveling mechanism 2 rolls on the upper surface of the rocket sled rails 5 on both sides, driving the frame 1 and the inspection instrument on the frame 1 to move.

[0039] In addition, a guide mechanism 3 is connected to the bottom of the vehicle frame 1, which guides and limits the travel direction of the vehicle body structure to prevent derailment. The guide mechanism 3 uses an elastic telescopic structure to roll closely against the inner surfaces of the rocket sled rails 5 on both sides. That is, no matter whether the rocket sled rails 5 on both sides have deviations, and no matter in which direction the deviations occur, the guide mechanism 3 is closely against the inner surfaces of the rocket sled rails 5 on both sides by means of the elasticity of the elastic telescopic structure.

[0040] An encoder is connected to the traveling mechanism 2 to record the mileage of the traveling mechanism 2, so that the data detected along the way can correspond to the position on the rocket sled rail 5 to locate the deviation position. A sensor group 4 for distance measurement and inclination measurement is installed on the frame 1. Distance measurement is to detect whether the rocket sled rails 5 on both sides deviate and the degree of deviation, and inclination measurement is to detect the inclination amplitude of the rocket sled rails 5.

[0041] The inspection instrument is installed on the frame 1 of the vehicle body structure, for example, in the middle of the crossbeam 12 of the frame 1. In some embodiments, a display bracket 8 is connected to the upper surface of the middle of the crossbeam 12. The display bracket 8 is, for example, a rectangular hollow steel pipe with a length of 120 mm, a width of 80 mm, and a height of 500 mm. The thickness of the hollow steel pipe is 2 mm. The inspection instrument is placed at the upper end of the hollow steel pipe. The inspection instrument has a liquid crystal touch screen as an interactive interface. As for the power supply 15, circuit board 16, etc. required for the operation of the inspection instrument, as shown in FIG. Figure 7 As shown, in some embodiments, the power supply 15 and the circuit board 16 are respectively mounted on the lower surface of the cross arm and are equipped with necessary protection facilities.

[0042] The vehicle body structure has a certain weight. In order to facilitate loading the vehicle body structure onto the rocket sled slide rail 5 (or unloading it from it), a plurality of lifting rings 14 are designed on the frame 1 of the vehicle body structure. For example, three lifting rings 14 are designed at both ends of the longitudinal beam 11 and at the end of the cross beam 12 away from the longitudinal beam 11 to facilitate lifting the vehicle body structure.

[0043] Considering that the inspection instrument may need to be manually pushed for measurement in some occasions, or the inspection instrument may be dragged on the slide rail by a rail tractor, a push rod 9 or a traction connection device 6 is designed on the frame 1. The push rod 9 is used to manually push the vehicle body structure, and the traction connection device 6 is used to connect the rail tractor for dragging.

[0044] In some embodiments, Figure 1 As shown, the push rod 9 is connected to the bottom end of the display bracket 8, which can facilitate the operator's pushing operation and ensure the stability of the pushing process. In addition, the push rod 9 can be designed to have a fixed angle of about 40 degrees with the horizontal plane to match the height of the operator, or the push rod 9 can be hinged on the display bracket 8 to adjust the angle between it and the horizontal plane. A handle is designed at the free end of the push rod 9 to facilitate the operator to hold and operate.

[0045] When driven by a rail tractor, it is obvious that facilities for connecting the traction connection device 6 are designed on the vehicle body structure. In some embodiments, such as Figure 1 , Figure 7 As shown, two (or other numbers) connection parts for connecting the traction connection device are designed on the same side of the frame 1.

[0046] As for the traction connection device 6, since it is connected to the rail traction vehicle, when the inspection instrument is driven by the rail traction vehicle to work, the motor will inevitably vibrate. In order to prevent the motor vibration from affecting the measurement accuracy, in some embodiments, the traction connection device 6 is designed to have a shock absorbing effect, such as Figure 6As shown, it is designed to include a damper 61 and universal joints 62 connected to both ends of the damper 61, and a second spring 63 is connected between the middle part and the movable end of the damper 61, and the second spring 63 can improve the buffering effect. The universal joints 62 at both ends can be quickly connected to the vehicle body structure and the rail tractor by bolts.

[0047] Preferably, a thread 64 is designed on the surface of the damper 61, a movable nut 65 is threadedly connected to the damper 61, and one end of the second spring 63 is connected to the movable nut 65. By rotating and adjusting the position of the movable nut 65 on the damper 61, the elastic potential energy of the second spring 63 can be adjusted, thereby achieving the adjustment of the shock absorption accuracy.

[0048] Example 2

[0049] The embodiment of the present application also provides a walking mechanism 2 of a vehicle body structure.

[0050] The walking mechanism 2 includes at least three sets of main wheels, which are respectively connected to the two ends of the longitudinal beam 11 and the end of the cross beam 12 away from the longitudinal beam 11. In addition, a set of main wheels can also be connected to the middle position of the longitudinal beam 11 to improve the stability of the support of the frame 1.

[0051] All the main wheel groups are in the same plane, that is, the supporting points of all the main wheel groups on the upper surface of the rocket sled rail 5 are in the same plane, which is parallel to the upper plane of the crossbeam 12 to ensure the accuracy of the inclination measurement.

[0052] In some embodiments, Figure 3 As shown, the main wheel assembly includes a main wheel 21, a wheel frame 22 and a rotating shaft 23. The main wheel 21 is connected to the wheel frame 22 through the rotating shaft 23, and the wheel frame 22 is connected to the corresponding beam of the frame 1 through bolts, etc. The rotating shafts 23 of all main wheel assemblies are parallel to the upper plane of the cross beam 12. And, preferably, all main wheels 21 are connected with encoders.

[0053] On the rocket sled rail 5, since the surface of the rail may be stained with a lot of oil mud, if the main wheel 21 has a large contact area with the upper surface of the rail, it is easy to cause the surface of the main wheel 21 to be stained with oil mud during the measurement process, which will affect the measurement accuracy. Therefore, when designing the main wheel 21, in order to reduce the contact area between the main wheel 21 and the surface of the rail, it is designed to have a main wheel 21 structure with a wavy tread. In this way, the pressure on the contact surface between the main wheel 21 and the upper surface of the rail increases, and the oil mud can be squeezed into the space where the two are not in contact, effectively avoiding the adhesion of oil mud on the contact surface between the main wheel 21 and the rail, thereby avoiding the impact on the measurement accuracy.

[0054] Example 3

[0055] The embodiment of the present application also provides a guide mechanism 3 of the vehicle body structure.

[0056] The guide mechanism 3 guides and restricts the movement of the vehicle body structure. Therefore, preferably, corresponding guide components are designed on the rocket sled rails 5 on both sides.

[0057] In some embodiments, the guide mechanism 3 includes two groups of first guide modules 31 and two groups of second guide modules 32. The two groups of first guide modules 31 are located on one side of the frame 1, and the two groups of second guide modules 32 are located on the other side of the frame 1. The two groups of first guide modules 31 and the two groups of second guide modules 32 are arranged along the direction of movement of the frame 1.

[0058] In the rocket sled rails 5 on both sides, the rocket sled rail 5 on one side is usually defined as a reference rail 51, and the rocket sled rail 5 on the other side is defined as a measuring rail 52. The first guide module 31 and the second guide module 32 have different structures. The two groups of first guide modules 31 are in rigid contact with the inner surface of the reference rail 51, while the two groups of second guide modules 32 are in elastic contact with the inner surface of the measuring rail 52.

[0059] The two first guide modules 31 are both mounted on the longitudinal beam 11. Figure 4 As shown, in some embodiments, the first guide module 31 includes a first guide wheel 311, a connecting rod 312 and a first bracket 313. The first guide wheel 311 is vertically connected to the first bracket 313 through the connecting rod 312. The connecting rod 312 is fixedly connected to the first bracket 313. The first bracket 313 (top) is connected to the longitudinal beam 11, so that the first guide wheel 311 is tangent to the inner surface of the reference slide rail 51, thereby playing a guiding and positioning role.

[0060] Since the frame 1 designed in the present application is a T-shaped structure, the installation position at the end of the cross beam 12 away from the longitudinal beam 11 is limited. When a set of main wheels are connected to the bottom surface of the cross beam 12, the two sets of second guide modules 32 need to be connected to the cross beam 12 by means of corresponding ribs. Figure 5 As shown, the second guide module 32 includes a second guide wheel 321, a guide rod 322 and a second bracket 323. The second guide wheel 321 is connected to the guide rod 322. The guide rod 322 vertically penetrates the second bracket 323 and is movably connected to the second bracket 323. The guide rod 322 is connected to the first spring 324 on both sides of the second bracket 323. The first springs 324 on both sides are respectively limited between the second bracket 323 and the two ends of the guide rod 322. Obviously, the second guide wheel 321 is subjected to an elastic force in the direction of the measuring slide rail 52 at a position corresponding to the measurement slide rail 52 without deviation. The second bracket 323 (top) is connected to the front and rear side surfaces of the crossbeam 12 through a T-shaped rib plate 327. In addition, preferably, a reinforcing rib 328 is also provided on the T-shaped rib plate 327 to prevent the T-shaped rib plate 327 from deforming.

[0061] Due to the addition of the first spring 324 , no matter in which direction the measuring slide rail 52 deviates, the second guide wheel 321 can be pushed to be close to the inner surface of the measuring slide rail 52 by the elastic force.

[0062] Considering that the vehicle body structure is loaded onto the rocket sled rail 5 only when the rail is inspected, and needs to be removed from the rail after the inspection, in some embodiments, a retracting device is also connected to the bracket of the second guide module 32, which is used to retract the second guide wheel 321, so as to prevent the guide mechanism 3 from being stuck inside the rail, and facilitate the removal of the vehicle body structure. The retracting device is connected to the second guide wheel 321, and the retracting device controls whether the second guide wheel 321 is in a free state or in the retracting device.

[0063] Specifically, if Figure 5 As shown, in some embodiments, the retracting device includes a retracting frame 325, on which a screw is connected, the screw passes through the second bracket 323 and is movably connected to the second bracket 323, and a portable nut (such as a butterfly nut) 326 is threadedly connected to the end of the screw passing through the second bracket 323. During the operation of the inspection instrument, the portable nut 326 has no constraint on the retracting frame, that is, the screw can move freely in the second bracket 323. Before or after the inspection, when the second guide wheel 321 needs to be retracted, the second guide wheel 321 can be retracted by tightening the portable nut 326, so as to facilitate the removal of the vehicle body structure from the rocket sled rail 5.

[0064] Example 4

[0065] The embodiment of the present application also provides a mounting structure for the sensor group 4 and the encoder.

[0066] The encoder is connected to the rotating shaft 23 of each main wheel 21 to synchronously record the travel distance. Figure 3 As shown, in some embodiments, an encoder bracket 71 is connected to the wheel frame 22, and the encoder is mounted on the encoder bracket 71, and is connected to the rotating shaft 23 of the main wheel 21 through a coupling 72. Preferably, an encoder protection cover 73 is also connected to the encoder bracket 71, and the encoder protection cover 73 is covered on the encoder to protect the encoder.

[0067] like Figure 7 , Figure 8 As shown, the sensor group 4 is designed with a laser distance sensor group 41, whether on the reference rail 51 side or on the measuring rail 52 side, and each group of laser distance sensors includes at least one laser distance sensor. In some embodiments, three laser distance sensors are designed as a group and assembled together through a protective box. The two groups of laser distance sensors are respectively connected to the two ends of the beam 12, facing the inner surface of the reference rail 51 and the measuring rail 52, respectively.

[0068] like Figure 8 As shown, taking the laser distance measuring sensor group 41 on the measuring slide rail 52 side as an example, it is located between the two groups of second guide modules 32. The group of laser distance measuring sensors is connected to the lower surface of the crossbeam 12 through an I-beam 43. Since an encoder is connected to the main wheel 21 of the main wheel group on this side, the I-beam 43 may interfere with the encoder. In view of this situation, in some embodiments, a through hole is opened on the I-beam 43, and the encoder passes through the through hole.

[0069] like Figure 8 As shown, the sensor group 4 includes at least two groups of inclination sensors 42, which are symmetrically mounted on two sides of the beam 12 perpendicular to the travel direction, i.e., the front and rear sides. In some embodiments, each group of inclination sensors 42 includes two inclination sensors 42, and the two inclination sensors 42 on each side are 350m away from the end face of the beam 12 near the measuring slide rail 52, and the distance between the two inclination sensors 42 is 150mm.

[0070] According to the embodiments of the present application, the frame 1 adopts a T-type box structure, which has the advantages of easy disassembly and assembly, good disassembly and assembly repeatability, and good guidance. Compared with the T-type structure, under the condition of the same structural rigidity, the H-type structure currently used in the railway track measuring vehicle is more cumbersome and inconvenient to operate. The T-type structure is compact and has a large vibration resistance, and the T-type structure can achieve single-point measurement during measurement, which can better ensure the measurement accuracy requirements. The use of a box-type structure can divide the internal space of the box, which is convenient for the classified installation of parts or functional components, making the installation before measurement and the disassembly after measurement faster and simpler, improving work efficiency, and facilitating the passage of communication lines, electric wires and other connecting lines when installing functional components, making the appearance more concise.

[0071] The vehicle body structure designed by the present invention can realize manual and automatic measurement. The vehicle body structure is designed with a threaded hole for installing a push rod 9. The push rod 9 can be installed and fixed on the vehicle body structure by bolts to realize manual measurement. On the basis of the vehicle body structure, a connecting device for connecting an automatic tractor is also designed. Through the connecting device, a soft connection between the rail tractor and the slide rail inspection instrument can be realized, and the transmission of the tractor vibration is eliminated to the maximum extent. At the same time, it can avoid the inspection instrument from continuing to move forward due to inertia and causing collision after the tractor stops.

[0072] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A vehicle body structure of a rocket sled rail inspection instrument, comprising a vehicle frame; characterized in that: The frame is T-shaped and consists of a longitudinal beam, a transverse beam and at least one diagonal bracing beam, wherein the transverse beam vertically connects the middle of the longitudinal beam, and the two ends of the diagonal bracing beam respectively connect one end of the longitudinal beam and the middle of the transverse beam; The bottom of the frame is connected with a walking mechanism and a guiding mechanism; the walking mechanism rolls on the upper surface of the rocket sled rails on both sides; the guiding mechanism adopts an elastic telescopic structure and rolls closely against the inner surface of the rocket sled rails on both sides; The walking mechanism is connected with an encoder; the frame is equipped with a sensor group for measuring distance and tilt angle respectively.

2. The body structure of the rocket sled rail inspection instrument as claimed in claim 1, characterized in that: The walking mechanism is provided with main wheel groups at least at the two ends of the longitudinal beam and the end of the cross beam away from the longitudinal beam, and all the main wheel groups are in the same plane, which is parallel to the upper plane of the cross beam.

3. The body structure of the rocket sled rail inspection instrument as claimed in claim 2, characterized in that: The main wheel assembly comprises a main wheel and a wheel frame, the main wheel is connected to the wheel frame via a rotating shaft, and the wheel frame is connected to the vehicle frame; the rotating shaft of each main wheel assembly is parallel to the upper plane of the crossbeam.

4. The body structure of the rocket sled rail inspection instrument as claimed in claim 3 is characterized in that: The tread of the main wheel is wave-shaped.

5. The body structure of the rocket sled rail inspection instrument as claimed in claim 1, characterized in that: The guide mechanism includes at least two groups of first guide modules in rigid contact with the inner surface of the rocket sled slide rail on one side, and at least two groups of second guide modules in elastic contact with the inner surface of the rocket sled slide rail on the other side.

6. The body structure of the rocket sled rail inspection instrument as claimed in claim 5, characterized in that: The second guide module includes a guide wheel and a bracket, the guide wheel is connected to a guide rod, the guide rod vertically penetrates the bracket and is movably connected to the bracket, and the guide rod is connected to springs on both sides of the bracket; the bracket is connected to the frame.

7. The body structure of the rocket sled rail inspection instrument as claimed in claim 6, characterized in that: A retracting device is connected to the bracket of the second guide module, and the retracting device is connected to the guide wheel. The guide wheel is controlled by the retracting device to be in a free state or a retracted state.

8. The body structure of the rocket sled rail inspection instrument as claimed in claim 1, characterized in that: The sensor group includes at least two groups of laser ranging sensors, which are respectively connected to the two ends of the crossbeam, and the two groups of laser ranging sensors are respectively facing the inner surfaces of the rocket sled rails on both sides.

9. The body structure of the rocket sled rail inspection instrument as claimed in claim 1, characterized in that: The sensor group includes at least two groups of inclination sensors, and the two groups of inclination sensors are symmetrically installed on two side surfaces of the beam that are perpendicular to the traveling direction.

10. The body structure of the rocket sled rail inspection instrument as claimed in claim 1, characterized in that: The frame is connected with a traction connection device, which includes a damper and universal joints respectively connected at both ends of the damper, and a spring is further connected between the middle part and the movable end of the damper.

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