Rail excitation device

Abstract

The application discloses a steel rail excitation device, a hitting unit is fixedly installed on a longitudinal positioning unit, the hitting position of the hitting unit in the vertical direction of the rail is adjusted through the longitudinal positioning unit; a transverse positioning unit is fixedly connected with the lower end of the longitudinal positioning unit, the hitting position of the hitting unit in the horizontal direction of the rail is adjusted through the transverse positioning unit; the hitting unit comprises a measuring hammer, a hammer frame, a hammer limiting structure and a hammer blocking structure, the measuring hammer is fixedly installed on the hammer frame, the hammer limiting structure is rotationally connected with the hammer frame and is used for adjusting the angle between the measuring hammer and the vertical direction; the hammer blocking structure is connected with the hammer limiting structure and cooperates with the hammer limiting structure to stop the measuring hammer after hitting the rail; the application realizes that the test hammer hits only once through the interlocking of mechanical parts, and the hammer body cannot rebound and hit again. The hammer body can be adjusted at random between zero and ninety degrees through the semicircular groove, and the determination of the hitting force is ensured.

Description

Technical Field

[0001] This invention relates to the field of rail testing technology, specifically to a rail excitation device. Background Technology

[0002] To ensure the safety of railway track structures, regular inspections are necessary. Among the many inspection items, rail vibration testing is a crucial component. Rail vibration testing is used to obtain the rail's modal parameters, such as frequency, mode shape, and damping ratio. Because modal parameters reflect the dynamic characteristics of the structure itself, they are often used to determine the rail's service condition.

[0003] When testing rails using a rail excitation device, a hammer with a force sensor is used to strike the rail waist. The magnitude of the force is then measured by a measuring instrument to determine whether the rail meets the requirements. For accuracy, only one strike is allowed at a time (multiple strikes are not permitted), and the striking force must be consistent. In addition, rail testing is an outdoor operation, requiring the device to be powered and rely entirely on mechanical means. Summary of the Invention

[0004] This invention provides a rail excitation device.

[0005] To achieve the above objectives, the main technical solution adopted by the present invention is a rail excitation device, comprising: a longitudinal positioning unit, a transverse positioning unit, and a striking unit; the striking unit is fixedly installed on the longitudinal positioning unit, and the striking position of the striking unit in the vertical direction of the rail is adjusted by the longitudinal positioning unit; the transverse positioning unit is fixedly connected to the lower end of the longitudinal positioning unit, and the striking position of the striking unit in the horizontal direction of the rail is adjusted by the transverse positioning unit. The striking unit includes a measuring hammer, a hammer frame, a hammer limiting structure, and a hammer blocking structure. The measuring hammer is fixedly mounted on the hammer frame. The hammer limiting structure is rotatably connected to the hammer frame and is used to adjust the angle between the measuring hammer and the vertical direction. The hammer blocking structure is connected to the hammer limiting structure and cooperates with the hammer limiting structure to stop the measuring hammer after it hits the track.

[0006] The hammer frame includes a main shaft and an open locking ring. The open locking ring and the main shaft are sequentially sleeved on the outside of the hammer handle of the measuring hammer and are fixedly connected to the measuring hammer by a set screw. The main shaft has protrusions on both sides, and the protrusions on both sides of the main shaft are rotatably connected to the hammer limiting structure.

[0007] The hammer limiting structure includes a mounting frame, a positioning sleeve, a limiting bushing, and a pull rod. The two ends of the mounting frame are rotatably connected to the protrusions on both sides of the main shaft of the hammer frame. The positioning sleeve is fixedly sleeved on the protrusion on one side of the main shaft. The limiting bushing is sequentially connected to one end of the mounting frame and the positioning sleeve through a through pull rod. A first spring is sleeved on the pull rod. The pull rod drives the first spring to slide inside the limiting bushing. A start handle is provided at one end of the pull rod that extends out of the limiting bushing. By pulling the start handle, the other end of the pull rod moves in and out of the limiting hole in the positioning sleeve.

[0008] The mounting frame is provided with a pull rod slide and a fixing hole for a fixed limiting bushing. The pull rod is slidably connected in the pull rod slide of the mounting frame. The limiting bushing is provided with a fastening screw slide and is fixed to the mounting frame by fastening screws. The outer wall of the positioning sleeve is provided with a positioning groove and a starting boss for stopping the measuring hammer.

[0009] The hammer blocking structure includes a sliding body, a slider, a pressure block, an outer cover, and a sliding hand. The sliding body is fixed on the mounting bracket of the hammer limiting structure. The slider is slidably connected inside the sliding body. The pressure block is located on the upper end face of the sliding body. The outer cover is fitted onto the sliding body and fixedly connected to it. The sliding hand drives the slider that passes through the outer cover to slide and connect with the outer cover.

[0010] The slide body has a groove inside, and a second spring is installed in the groove. One end of the second spring abuts against the end of the groove, and the other end abuts against the slider. The slide body has a stop pin and an open moving plate shaft hole. A starting plate is installed in the moving plate shaft hole. The pressure block and the moving plate shaft hole cooperate to form a complete shaft hole. The starting plate rotates in the moving plate shaft hole and stops rotating at the stop pin. The slider has a long arm and a short arm. The short arm faces the positioning sleeve of the hammer limiting structure. The outer cover has a guide groove. The slider drives the long arm to slide and connect with the outer cover through the guide groove.

[0011] The longitudinal positioning unit includes a base plate, a column, and a crossbeam. The column is vertically fixed on the base plate. One end of the crossbeam is sleeved on the column and fixed by fasteners. A sliding sleeve is provided on the crossbeam. The mounting bracket of the hammer limiting structure is fixedly connected to the sliding sleeve at both ends. Positioning nails are provided on the base plate.

[0012] The lateral positioning unit is a skateboard-type positioning unit, which includes a skateboard, pulleys and guide wheels. Guide posts are provided on both sides of the skateboard, and a positioning pin is provided in the middle of the base plate. Pulleys and guide wheels are provided at the four corners of the base plate in sequence. The guide wheels cooperate with the guide posts of the skateboard to make the base plate move on the skateboard.

[0013] The lateral positioning unit is a rail-clamping positioning unit, which includes a fixed clamping block, a movable clamping block, and a clamping block frame. The fixed clamping block and the clamping block frame are fixedly installed on the base plate, and the movable clamping block is slidably connected to the clamping block frame. The clamping block and the movable clamping block face each other toward the rail. The clamping block frame is provided with through clamping pins. By tightening the clamping pins, the fixed clamping block and the movable clamping block are made to grip the rail.

[0014] The upper end of the measuring hammer is provided with an interface for connecting to external devices. A force sensor is installed inside the measuring hammer, and the data from the force sensor is transmitted to the external devices through the interface.

[0015] The present invention has the following beneficial effects and advantages: 1. This device ensures that the test hammer strikes only once each time through the interlocking of mechanical parts, and the hammer will not bounce back and strike again; the hammer can be adjusted arbitrarily between zero and ninety degrees through the fastening screw slide and the pull rod slide, ensuring the determination of the magnitude of the striking force; 2. This device adopts a sliding plate and rail clamping structure, which allows the tooling to slide along the rail direction to meet the testing requirements. It is simple to operate, has an attractive appearance, high testing efficiency, and flexible operation. The impact force is determined by controlling the angle of the hammer, avoiding the problem of uncertain impact force for each manual strike. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall design of the sliding plate rail excitation device of the present invention; Figure 2 This is a schematic diagram of the overall design of the rail clamping type rail excitation device of the present invention; Figure 3 This is a schematic diagram of the connection structure between the hammer holder and the measuring hammer; Figure 4 This is a schematic diagram showing the connection between the hammer limiting unit and the hammer frame. Figure 5 Schematic diagram of the hammer limiting unit; Figure 6 This is a schematic diagram of the hammer limiting unit from another angle; Figure 7 A schematic diagram of the assembled hammer limiting unit, hammer holder, and measuring hammer; Figure 8 A sectional view of the hammer limiting unit, hammer holder, and measuring hammer after assembly; Figure 9 This is a schematic diagram of the mounting bracket structure; Figure 10 This is a schematic diagram showing the connection between the hammer locking unit and the hammer limiting unit; Figure 11 This is a schematic diagram of the hammer-locking unit; Figure 12 This is a schematic diagram of the hammer-locking unit structure. Figure 13This is an assembly diagram of the hammer locking unit, hammer limiting unit, hammer frame, and measuring hammer. Figure 14 This is a schematic diagram of the hammer-clamp stop structure in the blocking state. Figure 15 A schematic diagram showing the hammer's stop and start states after the block is released; Figure 16 Schematic diagram of the preparation state for hammer jamming; Figure 17 This is a schematic diagram of the longitudinal positioning unit structure; Figure 18 A schematic diagram of the connection structure between the skateboard-type positioning unit and the base plate; Figure 19 This is a schematic diagram of the assembly structure of the guide wheel and the base plate; Figure 20 This is a schematic diagram of the connection structure between the rail positioning unit and the base plate.

[0017] in, 1 represents the measuring hammer, and 1-1 represents the interface; 2 is the hammer frame, 2-1 is the open locking ring, 2-2 is the main shaft, 2-2-1 is the bearing lock, 2-2-2 is the set screw lock, and 2-3 is the set screw; 3 is the hammer limiting structure, 3-1 is the bearing, 3-1-1 is the shaft screw, 3-2 is the positioning sleeve, 3-2-2 is the main shaft hole, 3-2-3 is the limiting hole, 3-2-4 is the positioning groove, 3-2-5 is the starting boss, 3-3 is the screw, 3-4 is the pull rod, 3-4-1 is the pull rod shaft, 3-5 is the first spring, 3-6 is the starting handle, 3-7 is the fastening pin, 3-8 is the limiting bushing, 3-8-1 is the fastening pin slide, 3-8-2 is the pull rod hole, and 3-8-3 is the pull rod shaft hole; 4 is the hammer-locking structure, 4-1 is the outer cover, 4-1-1 is the slider hole, 4-2 is the outer cover fastener, 4-3 is the mounting bracket, 4-3-1 is the shaft hole, 4-3-2 is the fastener hole, 4-3-3 is the slide mounting hole, 4-3-4 is the pull rod slide, 4-3-5 is the fixing hole, 4-3-6 is the slide sleeve mounting hole, 4-4 is the slider, 4-4-1 is the guide bar, 4-4-2 is the long arm hole, 4-5 is the slide body, 4-5-2 is the moving plate shaft hole, 4-5-3 is the slide groove, 4-5-5 is the guide groove, 4-6 is the pressure block, 4-6-1 is the limiting end, 4-7 is the starting plate, 4-7-1 is the long plate, 4-7-2 is the short plate, 4-8 is the slider, 4-8-1 is the long arm, 4-8-2 is the short arm, 4-9 is the stop pin, and 4-10 is the second spring. 5 is the longitudinal positioning unit, 5-1 is the crossbeam, 5-2 is the slide fastener, 5-3 is the column, 5-4 is the base plate, 5-5 is the positioning pin, and 5-6 is the slide sleeve; 6-1 Pulley, 6-1-1 Mounting screw, 6-1-2 Wheel axle mounting buckle, 6-2 Guide wheel, 6-3 Pulley axle, 6-3-1 Pulley mounting buckle, 6-3-2 Wheel fastening groove, 6-3-3 Wheel axle inner six-groove hole, 6-4 Slide plate, 6-4-1 Guide post; 7 is the track clamping structure, 7-2 is the clamping pin, 7-3 is the clamping block frame, 7-4 is the movable clamping block, and 7-5 is the fixed clamping block; 8 represents the track. Detailed Implementation

[0018] The invention will now be further described with reference to the accompanying drawings. Figures 1-2 As shown, the present invention is a rail excitation device, which is divided into a sliding plate type and a rail clamping type; the two have basically the same structure. The former uses a sliding plate type positioning unit to position the device on the rail, while the latter uses a rail clamping type positioning unit to change the clamping position on the rail. The rail excitation device of the present invention includes a longitudinal positioning unit, a transverse positioning unit, and an impact unit; the impact unit is fixedly installed on the longitudinal positioning unit, and the impact position of the impact unit in the vertical direction of the rail is adjusted by the longitudinal positioning unit; the transverse positioning unit is fixedly connected to the lower end of the longitudinal positioning unit, and the impact position of the impact unit in the horizontal direction of the rail is adjusted by the transverse positioning unit. The striking unit includes a measuring hammer 1, a hammer frame 2, a hammer limiting structure, and a hammer blocking structure. The measuring hammer 1 is fixedly mounted on the hammer frame 2. The hammer limiting structure is rotatably connected to the hammer frame 2 and is used to adjust the angle between the measuring hammer 1 and the vertical direction. The hammer blocking structure is connected to the hammer limiting structure and cooperates with the hammer limiting structure to stop the measuring hammer 1 after it strikes the track 8.

[0019] Furthermore, such as Figure 3 As shown, the hammer frame 2 includes a main shaft 2-2 and an open locking ring 2-1. The open locking ring 2-1 and the main shaft 2-2 are sequentially sleeved on the outside of the hammer handle of the measuring hammer 1 and are fixedly connected to the measuring hammer 1 by a set screw 2-3. The main shaft 2-2 has protrusions with bearing lock buckles 2-2-1 on both sides. The protrusions on both sides of the main shaft 2-2 are rotatably connected to the hammer limiting structure by bearings 3-1.

[0020] Specifically, the outer wall of the main shaft 2-2 is provided with a through set screw lock 2-2-2. By locking the set screw 2-3 inside the set screw lock 2-2-2, the open locking ring 2-1 is retracted inward, thereby fixing the measuring hammer 1 on the main shaft 2-2.

[0021] Furthermore, such as Figure 4-9As shown, the hammer limiting structure includes a mounting bracket 4-3, a positioning sleeve 3-2, a limiting bushing 3-8, and a pull rod 3-4. The mounting bracket 4-3 is rotatably connected at both ends to protrusions on both sides of the main shaft 2-2 of the hammer frame 2. The positioning sleeve 3-2 is fixedly sleeved on a protrusion on one side of the main shaft 2-2. The limiting bushing 3-8 is sequentially connected to one end of the mounting bracket 4-3 and the positioning sleeve 3-2 via a through pull rod 3-4. A first spring 3-5 is sleeved on the pull rod 3-4, which drives the first spring 3-5 to slide inside the limiting bushing 3-8. A starter handle 3-6 is located at one end of the pull rod 3-4 that extends out of the limiting bushing 3-8. Pulling the starter 3-6 causes the other end of the pull rod 3-4 to move in and out of the upper limit hole 3-2-3 in the positioning sleeve 3-2; the mounting bracket 4-3 is provided with a pull rod slide 4-3-4 and a fixing hole 4-3-5 for fixing the limiting bushing 3-8, and the pull rod 3-4 is slidably connected in the pull rod slide 4-3-4 in the mounting bracket 4-3; the limiting bushing 3-8 is provided with a fastening screw slide 3-8-1 that can be rotated to determine the initial position of the test hammer 1, and the limiting bushing 3-8 is fixed to the mounting bracket 4-3 by fastening screw 3-7; the outer wall of the positioning sleeve 3-2 is provided with a positioning groove 3-2-4 for stopping the measuring hammer 1 and a starting boss 3-2-5.

[0022] The spindle 2-2 passes through the spindle hole 3-2-2 on the positioning sleeve 3-2. The shaft screw 3-1-1 is fastened to the spindle 2-2 through the shaft hole 4-3-1. The engagement of the shaft 3-1 and the shaft hole 4-3-1 allows the spindle 2-2 to rotate on the mounting bracket 4-3. Adjust the positioning sleeve 3-2 to leave a 0.1 mm gap with the mounting bracket, and tighten the screw 3-3 to fix the positioning sleeve 3-2 on the spindle 2-2. The first spring 3-5 passes through the pull rod 3-4, and then together they pass through the pull rod hole 3-8-2 on the limiting sleeve 3-8. The starter handle 3-6 is screwed into the pull rod 3-4. The pull rod shaft 3-4-1 and the pull rod shaft hole 3-8-3 are clearance-fitted. Pulling the starter handle 3-6 allows the pull rod 3-4 to slide within the pull rod shaft hole 3-8-3. When the lever is released, the spring 3-5 causes the pull rod 3-4 to move towards the mounting bracket 4-3 within the pull rod shaft hole 3-8-3. After the pull rod 3-4 is installed on the limiting sleeve 3-8, the limiting sleeve 3-8 is installed on the mounting bracket 4-3 via the fastener 3-7 (do not tighten the screw at this time). At the same time, the other end of the pull rod 3-4 passes through the pull rod slide 4-3-4. Due to the fit between the shaft 3-1 and the shaft hole 4-3-1, a gap is always maintained between the fastener 3-7 and the fastener slide 3-8-1 when the limiting sleeve 3-8 is rotated, preventing the limiting sleeve 3-8 from getting stuck when rotating. Meanwhile, the pull rod 3-4 also moves within the pull rod slide 4-3-4.

[0023] Specifically, by rotating the limiting sleeve 3-8, the pull rod 3-4 is aligned with the limiting hole 3-2-3. Under the action of the first spring 3-5, the pull rod 3-4 is inserted into the limiting hole 3-2-3. The angle of the measuring hammer 1 is adjusted. After the requirement is met, the locking pin 3-7 is locked. Under the action of the pull rod 3-4, the main shaft 2-2 cannot rotate, and the measuring hammer 1 remains at the set angle. At this time, the start handle 3-6 is pulled, and the pull rod 3-4 moves out of the limiting hole 3-2-3. Under the gravity of the measuring hammer 1, the hammer head is driven to strike the track 8.

[0024] Furthermore, such as Figure 10-13 As shown, the hammer blocking structure includes a slide body 4-5, a slider 4-8, a pressure block 4-6, an outer cover 4-1, and a sliding handle 4-4. The slide body 4-5 is fixed on the mounting bracket 4-3 of the hammer limiting structure. The slider 4-8 is slidably connected inside the slide body 4-5. The pressure block 4-6 is provided on the upper end face of the slide body 4-5. The outer cover 4-1 is sleeved on the slide body 4-5 and is fixedly connected to the mounting bracket 4-3 by an outer cover fastener 4-2. The sliding handle 4-4 drives the slider 4-8, which passes through the outer cover 4-1, to slide and connect with the outer cover 4-1.

[0025] Specifically, the slider 4-5 has a groove 4-5-3 inside, and a second spring 4-10 is installed in the groove 4-5-3. One end of the second spring 4-10 abuts against the mounting bracket 4-3, and the other end abuts against the slider 4-8. The slider 4-5 has a stop pin 4-9 and an open moving plate shaft hole 4-5-2. A starting plate 4-7 is installed in the moving plate shaft hole 4-5-2. The pressure block 4-6 cooperates with the moving plate shaft hole 4-5-2 to form a complete shaft hole. The starting plate 4-7 rotates in the moving plate shaft hole 4-5-2 and stops rotating at the stop pin 4-9. The stop pin 4-9 restricts the rotation position of the starting plate 4-7. The slider has... The long arm 4-8-1 and the short arm 4-8-2 are arranged with the short arm 4-8-2 facing the positioning sleeve 3-2 of the hammer limiting structure. The outer cover 4-1 is provided with a guide groove 4-5-5. The lower part of the slider 4-4 is provided with a long arm hole 4-4-2 and a guide strip 4-4-1. When the slider 4-4 is moved, the long arm 4-8-1 is slidably connected to the outer cover 4-1 through the cooperation of the guide groove 4-5-5 and the guide strip 4-4-1. The displacement of the slider 4-8 is limited at one end by the starting piece 4-7 and at the other end by the slider hole 4-1-1, which also limits the displacement of the slider 4-4 so that it will not slide out of the outer cover 4-1. After assembly, tighten the screw 4-2.

[0026] like Figures 14-17 The diagram shown illustrates the implementation process of the hammer-locking structure. Figure 14 The diagram shows the hammer stop structure in the blocking state. At this time, the slider 4-8, under the action of the second spring 4-10, inserts into the positioning groove 3-2-4 of the positioning sleeve 3-2, preventing the main shaft 2-2 from rotating. The test hammer 1 rebounds and is then positioned. Figure 15The diagram shows the hammer stop state after the jamming is released. The hand moves the slider 4-4 to disengage the slider 4-8 from the positioning groove 3-2-4. The short arm 4-8-2 on the slider moves the starting plate 4-7-2, and combined with the weight of the long plate 4-7-1, the starting plate 4-7 rotates to the stop pin 4-9 position. Figure 16 );like Figure 16 The diagram shows the hammer in the ready-to-block state. Pulling the start handle 3-6 moves the pull rod 3-4 out of the limit hole 3-2-3. Under its own weight, the hammer rotates along the axis and strikes the track (the hammer is approximately perpendicular to the ground during impact). During the rotation of the main shaft 2-2, the start boss 3-2-5 pushes the short piece 4-7-2 of the start plate 4-7 upwards. Figure 15 Simultaneously, under the action of the second spring 4-10, slider 4-8 presses against the starting plate 4-7, causing it to rotate. At this time, slider 4-8 continues to move until it hits the outer surface of the limiting sleeve 3-8. After the hammer hits the track 8, it rebounds at a certain angle under the action of the reaction force. During the rebound process, the positioning groove 3-2-4 also reverses with the main shaft 2-2. When the positioning groove 3-2-4 rotates to the position of slider 4-8, slider 4-8 inserts into the positioning groove 3-2-4 under the action of the second spring 4-10, causing the main shaft 2-2 to stop rotating and avoiding continuous impact. Figure 16 (As shown). If the striking force does not meet the requirements, loosen screw 3-7, rotate limit sleeve 3-8 to adjust the hammer's position in the air, tighten screw 3-7 again, and perform the striking test again until the striking force is within the specified range.

[0027] Furthermore, such as Figure 17 As shown, the longitudinal positioning unit includes a base plate 5-4, a column 5-3, and a crossbeam 5-1. The column 5-3 is vertically fixed on the base plate 5-4. One end of the crossbeam 5-1 is sleeved on the column 5-3 and fixed by a sliding fastener 5-2. A sliding sleeve 5-6 is provided on the crossbeam 5-1. The two ends of the mounting bracket 4-3 of the hammer limiting structure are fixedly connected to the sliding sleeve 5-6.

[0028] Furthermore, such as Figures 18-19 As shown, in one embodiment of the present invention, the lateral positioning unit is a skateboard-type positioning unit. The skateboard-type positioning unit includes a skateboard 6-4, a pulley 6-1, and a guide wheel 6-2. Guide posts 6-4-1 are provided on both sides of the skateboard 6-4. A positioning pin 5-5 is provided in the middle of the base plate 5-4. The pulley 6-1 and the guide wheel 6-2 are provided at the four corners of the base plate 5-4 in sequence. The guide wheel 6-2 cooperates with the guide posts 6-4-1 of the skateboard 6-4 to make the base plate 5-4 move on the skateboard 6-4.

[0029] The pulley 6-1 is tightened onto the base plate 5-4 by the mounting screw 6-1-1. The pulley shaft 6-3 passes through the guide pulley 6-2, and together they are tightened through the wheel shaft mounting buckle 6-1-2 and the pulley mounting hole 6-3-1 using the inner six-slot hole 6-3-3 of the wheel shaft. After the four guide wheels 6-2 are installed, the slide plate 6-4 is installed along the direction of the slide plate guide post 6-4-1. The base plate 5-4 can slide on the slide plate 6-4. The position of the base plate 5-4 on the slide plate 6-4 is positioned by tightening the positioning pin 5-5 and pushing it against the slide plate 6-4. The base plate 5-4 drives the tooling to move on the slide plate 6-4, and measurements are taken at different points.

[0030] Furthermore, such as Figure 20 As shown, in one embodiment of the present invention, the lateral positioning unit is a rail-clamping positioning unit. The rail-clamping positioning unit includes a fixed clamping block 7-5, a movable clamping block 7-4, and a clamping block frame 7-3. The fixed clamping block 7-5 and the clamping block frame 7-3 are fixedly installed on the base plate 5-4. The movable clamping block 7-4 is slidably connected to the clamping block frame 7-3. The fixed clamping block 7-5 and the movable clamping block 7-4 face each other toward the rail 8. The clamping block frame 7-3 is provided with a through clamping nail 7-2. By tightening the clamping nail 7-2, the fixed clamping block 7-5 and the movable clamping block 7-4 are made to grip the rail 8.

[0031] Adjust the movable clamping block 7-4 to its maximum distance from the clamping block 7-5, place it on the track 8, and tighten the clamping pin 7-2 until its head presses against the movable clamping block 7-4, causing the clamping block to grip the track. Then perform the test. Loosen the clamping pin 7-2 and move the fixture to the next test position for further testing.

[0032] Furthermore, the upper end of the measuring hammer is provided with an interface 1-1 for connecting to an external device, and a force sensor is provided inside the measuring hammer 1. The data of the force sensor is transmitted to the external device through the interface 1-1.

[0033] The testing and implementation process of the sliding plate rail excitation device of this invention is as follows: Place the slide plate 6-4 stably on the track 8, and mark the test points according to the test requirements; move the device to the test point and tighten the positioning pin 5-5 to stop the device on the slide plate 6-4. Manually move the slider 4-4 to disengage the slider 4-8 from the positioning groove 3-2-4. The short arm 4-8-2 on the slider 4-8 moves the starting plate 4-7-2, and with the weight of the long plate 4-7-1 itself, the starting plate 4-7 rotates to the stop pin position. Figure 16Simultaneously, the hammer is held and rotated upwards. During rotation, the pull rod 3-4 automatically inserts into the limiting hole 3-2-3 of the positioning sleeve 3-2 under the action of the first spring 3-5, stopping the hammer in the set position. Pull out the start handle 3-6, and the hammer begins to rotate under its own weight. The hammer head strikes the track 8, and the impact force is transmitted to the equipment through the interface 1-1. During the impact, the starting boss 3-2-5 of the limiting bushing 3-8 strikes the short piece 4-7-2 on the starting plate 4-7, starting the rotation. The slider 4-8 moves towards the starting plate 4-7 under the action of the elastic force and presses against the outer circle of the positioning sleeve 3-2. After the hammer head strikes the track 8, it rebounds under the action of the reaction force. During the rebound, the slider 4-8 automatically inserts into the positioning groove 3-2-4 of the positioning sleeve under the action of the second spring 4-10, stopping the rotation of the main shaft 2-2 and preventing further impact. Release the positioning pin 5-5 and move the fixture to the next measurement position for the next measurement.

[0034] The testing and implementation process of the rail clamping type rail excitation device of the present invention is as follows: Loosen clamping pin 7-2 so that the distance between moving clamping block 7-4 and fixed clamping block 7-5 passes through the rail head of track 8. Tighten clamping pin 7-2 to fix the device on track 8 for testing. This rail clamping type rail excitation device differs from the above-mentioned sliding plate type rail excitation device only in its movement method; the other implementation processes are the same and will not be described again. After the test is completed, simply loosen clamping pin 7-2 slightly to move the device on track 8 to the next station for re-measurement.

Claims

1. A rail excitation device, characterized in that, It includes a longitudinal positioning unit, a transverse positioning unit, and a striking unit; the striking unit is fixedly installed on the longitudinal positioning unit, and the striking position of the striking unit in the vertical direction of the track is adjusted by the longitudinal positioning unit; the transverse positioning unit is fixedly connected to the lower end of the longitudinal positioning unit, and the striking position of the striking unit in the horizontal direction of the track is adjusted by the transverse positioning unit. The striking unit includes a measuring hammer, a hammer frame, a hammer limiting structure, and a hammer blocking structure. The measuring hammer is fixedly mounted on the hammer frame. The hammer limiting structure is rotatably connected to the hammer frame and is used to adjust the angle between the measuring hammer and the vertical direction. The hammer blocking structure is connected to and cooperates with the hammer limiting structure to stop the measuring hammer after it strikes the track. The hammer stop structure includes a sliding body, a slider, a pressure block, an outer cover, and a sliding handle. The sliding body is fixed on the mounting bracket of the hammer limiting structure. The slider is slidably connected inside the sliding body. The pressure block is located on the upper surface of the sliding body. The outer cover is fitted onto the sliding body and fixedly connected to it. The sliding handle drives the slider, which protrudes from the outer cover, to slide and connect with the outer cover. The sliding body has a sliding groove inside, and a second spring is installed in the groove. One end of the second spring abuts against the end of the groove, and the other end abuts against the slider. The sliding body has a stop pin and an open moving plate shaft hole. A starting plate is installed in the moving plate shaft hole. The pressure block and the moving plate shaft hole cooperate to form a complete shaft hole. The starting plate rotates in the moving plate shaft hole and stops rotating at the stop pin. The slider has a long arm and a short arm. The short arm faces the positioning sleeve of the hammer limiting structure. The outer cover has a guide groove. The sliding handle drives the long arm to slide and connect with the outer cover through the guide groove.

2. The rail excitation device according to claim 1, characterized in that: The hammer frame includes a main shaft and an open locking ring. The open locking ring and the main shaft are sequentially sleeved on the outside of the hammer handle of the measuring hammer and are fixedly connected to the measuring hammer by a set screw. The main shaft has protrusions on both sides, and the protrusions on both sides of the main shaft are rotatably connected to the hammer limiting structure.

3. The rail excitation device according to claim 2, characterized in that: The hammer limiting structure includes a mounting frame, a positioning sleeve, a limiting bushing, and a pull rod. The two ends of the mounting frame are rotatably connected to the protrusions on both sides of the main shaft of the hammer frame. The positioning sleeve is fixedly sleeved on the protrusion on one side of the main shaft. The limiting bushing is sequentially connected to one end of the mounting frame and the positioning sleeve through a through pull rod. A first spring is sleeved on the pull rod. The pull rod drives the first spring to slide inside the limiting bushing. A start handle is provided at one end of the pull rod that extends out of the limiting bushing. By pulling the start handle, the other end of the pull rod moves in and out of the limiting hole in the positioning sleeve.

4. The rail excitation device according to claim 3, characterized in that: The mounting frame is provided with a pull rod slide and a fixing hole for a fixed limiting bushing. The pull rod is slidably connected in the pull rod slide of the mounting frame. The limiting bushing is provided with a fastening screw slide and is fixed to the mounting frame by fastening screws. The outer wall of the positioning sleeve is provided with a positioning groove and a starting boss for stopping the measuring hammer.

5. The rail excitation device according to claim 1, characterized in that: The longitudinal positioning unit includes a base plate, a column, and a crossbeam. The column is vertically fixed on the base plate. One end of the crossbeam is sleeved on the column and fixed by fasteners. A sliding sleeve is provided on the crossbeam. The mounting bracket of the hammer limiting structure is fixedly connected to the sliding sleeve at both ends. Positioning nails are provided on the base plate.

6. The rail excitation device according to claim 5, characterized in that: The lateral positioning unit is a skateboard-type positioning unit, which includes a skateboard, pulleys and guide wheels. Guide posts are provided on both sides of the skateboard, and a positioning pin is provided in the middle of the base plate. Pulleys and guide wheels are provided at the four corners of the base plate in sequence. The guide wheels cooperate with the guide posts of the skateboard to make the base plate move on the skateboard.

7. The rail excitation device according to claim 5, characterized in that: The lateral positioning unit is a rail-clamping positioning unit, which includes a fixed clamping block, a movable clamping block, and a clamping block frame. The fixed clamping block and the clamping block frame are fixedly installed on the base plate, and the movable clamping block is slidably connected to the clamping block frame. The clamping block and the movable clamping block face each other toward the rail. The clamping block frame is provided with through clamping pins. By tightening the clamping pins, the fixed clamping block and the movable clamping block are made to grip the rail.

8. The rail excitation device according to claim 1, characterized in that: The upper end of the measuring hammer is provided with an interface for connecting to external devices. A force sensor is installed inside the measuring hammer, and the data from the force sensor is transmitted to the external devices through the interface.

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