A railway track trolley

Abstract

The present application relates to a kind of railway track trolley, characterized by: car body is connected by quick-release type locking mechanism by left car body and right car body and is formed;Walking part is made of left and right two groups of walking units, and includes wheel frame and two walking wheels;Two groups of walking units are connected respectively to the lower of left and right car body;Handle includes U-shaped bent pole, two front support rods and two rear support rods;The end of the two ends of U-shaped bent pole vertical pole is fixedly connected with the upper end of two front support rods through adapter sleeve and lock pin, and the middle of two front support rods is fixedly connected with the upper end of two rear support rods through transition sleeve and screw;The lower end of two front support rods is respectively inserted and fixedly connected with the locking support block of the upper part of the front end of corresponding side wheel frame, and the lower end of two rear support rods is respectively inserted and fixedly connected with the locking support block of the upper part of the rear end of corresponding side wheel frame;Side fixed limiting mechanism and side elastic limiting mechanism are connected with right car body and left car body respectively, to realize the lateral limiting of trolley on track.The present track trolley has the advantages of quick assembly and disassembly.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical devices, and particularly relates to a railway track trolley. BACKGROUND

[0002] In the field of railway track detection technology, the railway track trolley is an important carrier tool. The operating personnel installs the detection equipment on the railway track trolley, and then pushes the trolley on the railway track to complete the detection operation. Since the location of the railway track is often inconvenient for motor vehicles to operate, the railway track trolley needs to be carried by the operating personnel to the detection site. At present, some railway track trolleys are inconvenient to disassemble and need to be carried by the operating personnel as a whole. Such railway track trolleys have the disadvantages of being inconvenient to store, transport and carry. Another type of railway track trolley can be disassembled into several parts for storage, transportation and carrying, and then the operating personnel carries each part to the site, and then fastens the parts together through screws to form the whole machine, and then performs the detection operation. Although this type of railway track trolley is convenient to store, transport and carry, it is inconvenient to install, which greatly reduces the efficiency of on-site operation. In order to solve the above problems, it is an urgent need to develop a railway track trolley which has the characteristics of being convenient to store, transport, carry, disassemble and install. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art and provide a railway track trolley which can be quickly assembled and disassembled, thereby being convenient to store, transport, carry and improving the efficiency of on-site operation.

[0004] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0005] A railway track trolley comprises a handle, a trolley body, a walking part, a lateral fixing and limiting mechanism and a lateral elastic limiting mechanism.

[0006] The trolley body is composed of a left trolley body and a right trolley body connected by a quick-release locking mechanism.

[0007] The walking part is composed of two groups of walking units arranged on the left and right sides. Each group of walking units comprises a wheel frame and two walking wheels installed on the front and rear ends of the lower part of the wheel frame. The left part of the left trolley body is fixedly connected to the middle part of the wheel frame of the left walking unit, and the right part of the right trolley body is fixedly connected to the middle part of the wheel frame of the right walking unit.

[0008] The handle comprises a U-shaped bent rod, two front supporting rods and two rear supporting rods; the end portions of the vertical rods at the two ends of the U-shaped bent rod are fixedly connected with the upper end portions of the two front supporting rods through adapter sleeves and lock pins respectively, the middle portions of the two front supporting rods are fixedly connected with the upper ends of the two rear supporting rods through transition sleeves and screws respectively; the lower end bends of the two front supporting rods are respectively plug-in fixedly connected with the lock supporting blocks at the upper portions of the front ends of the corresponding side wheel frames, and the lower end bends of the two rear supporting rods are respectively plug-in fixedly connected with the lock supporting blocks at the upper portions of the rear ends of the corresponding side wheel frames.

[0009] The lateral fixed limiting mechanism and the lateral elastic limiting mechanism are fixedly connected with the right car body and the left car body respectively; the lateral fixed limiting mechanism and the lateral elastic limiting mechanism both comprise two limiting wheels arranged at the front and rear positions of the lower portions; the two limiting wheels of the lateral fixed limiting mechanism are in rolling contact with the inner side surface of one side track, and the two limiting wheels of the lateral elastic limiting mechanism are in rolling contact with the inner side surface of the other side track, so that the lateral limiting of the trolley on the track is realized.

[0010] Moreover, the quick-release type lock mechanism comprises a lock left portion and a lock right portion; the lock left portion is embedded at a position close to the right end of the left car body and is fixed with the left car body; the lock right portion is embedded at a position close to the left end of the right car body and is fixed with the right car body.

[0011] The lock left portion comprises a crank, a flange sliding groove, a mounting body, a sliding rod, a connecting rod, a locking spring and a cover; the mounting body is in the shape of a rectangular box, is provided with three vertical through holes in the up-down direction, and is provided with three horizontal holes at the right side, which are vertically intersected with the three vertical through holes respectively; the connecting rod is inserted into the middle vertical through hole, the lower end of the connecting rod is embedded into the eccentric recess provided at the head of the crank, and the two are connected through a screw, the crank can rotate around the screw, and the head of the crank is in contact and cooperation with the lower end surface of the mounting body; the two sliding rods are inserted into the two vertical through holes at the two sides, the upper ends of the two sliding rods and the upper end of the connecting rod are vertically inserted into the fastening screw, so as to realize the fixed connection of the three; the lower portions of the two sliding rods are integrally provided with a tapered surface with the upper portion smaller than the lower portion and a sleeve with a tapered surface fixed thereon; a cover is fixed at the position corresponding to the vertical through hole at the two sides at the bottom of the mounting body respectively, and the upper end of the cover is press-inserted with the locking spring;

[0012] The lock right portion comprises two locking rods and a mounting plate, and the two locking rods are inserted and fixed into the two rod holes on the mounting plate; the left ends of the two locking rods are provided with annular recesses, the two annular recesses are matched with the tapered surfaces at the lower ends of the two sliding rods, so as to realize the locking connection of the lock left portion and the lock right portion.

[0013] Moreover, the lateral fixed limiting mechanism further comprises a fixed seat, a screw rod I, a locking nut, a linear bearing set, a curved arm, and a connecting plate; the screw rod I is a rod body structure provided with a light rod guiding section in the middle and a thread at both ends; the front and rear ends of the connecting plate are fixedly connected with a curved arm respectively, the upper ends of the two curved arms are fixedly connected with a linear bearing set respectively, the middle part of a screw rod I is fitted and guided by the two linear bearing sets respectively, and a locking nut is connected to the outer ends of the two screw rods I respectively; a fixed seat is installed at the ends of the two screw rods I respectively, and the fixed seats at the ends of one screw rod I are fixedly connected with the front side of the right vehicle body, and the fixed seats at the ends of the other screw rod I are fixedly connected with the rear side of the right vehicle body; a limiting wheel is rotatably installed at the lower end of the two curved arms, and the two limiting wheels are in rolling contact with the inner side of a side rail.

[0014] Moreover, the lateral elastic limiting mechanism further comprises a fixed seat, a screw rod II, a spring I, a spring II, a locking nut, a linear bearing set, a curved arm, a limiting wheel, and a connecting plate; the screw rod II is a rod body structure provided with a light rod guiding section in the middle and a thread at both ends; the front and rear ends of the connecting plate are fixedly connected with a curved arm respectively, the upper ends of the two curved arms are fixedly connected with a linear bearing set respectively, the middle part of a screw rod II is fitted and guided by the two linear bearing sets respectively, the spring I and the spring II are sleeved on the outer ends of the two screw rods II respectively, and a locking nut is fixed on the outer ends of the two screw rods II respectively to achieve elastic compression of the spring I and the spring II; a fixed seat is installed at the ends of the two screw rods II respectively, and the fixed seats at the ends of one screw rod II are fixedly connected with the front side of the left vehicle body through screws, and the fixed seats at the ends of the other screw rod II are fixedly connected with the rear side of the left vehicle body through screws; a limiting wheel is rotatably installed at the lower end of the two curved arms, and the two limiting wheels are in rolling contact with the inner side of the other side rail.

[0015] The present application has the advantages and positive effects that:

[0016] 1. The railway track trolley adopts modular design for the handle, and the handle is fixedly connected with the walking part through a locking screw to realize quick installation and quick disassembly of the handle and the vehicle body.

[0017] 2. The railway track trolley adopts modular design for the vehicle body, and the vehicle body is divided into a left vehicle body and a right vehicle body; after the handle is disassembled from the vehicle body, the left vehicle body and the right vehicle body can be quickly installed and disassembled through a locking mechanism. During storage and transportation, the whole machine can be disassembled into modules, effectively reducing the storage volume and reducing the transportation difficulty; when detection work is needed, each module can be quickly installed, effectively reducing the time of whole machine installation and assembly, and improving the on-site operation efficiency.

[0018] 3. The present invention provides a railway track trolley with a built-in locking mechanism, which is divided into a locking left part and a locking right part, which are fixedly connected to the left and right car bodies respectively. The locking mechanism enables the quick installation and quick disassembly of the left and right car bodies. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structural composition of the present invention;

[0020] Figure 2 This is a schematic diagram of the handle structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the vehicle body structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the vehicle body structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the locking mechanism structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the locking left-side structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the internal structure of the locking left part of the present invention;

[0026] Figure 8 This is a schematic diagram of the locking right-side structure of the present invention;

[0027] Figure 9 This is an internal oblique view of the locking mechanism of the present invention in the locked state;

[0028] Figure 10 This is an internal front view of the locking mechanism of the present invention in the locked state;

[0029] Figure 11 This is an internal perspective view of the locking mechanism of the present invention in the non-locking state;

[0030] Figure 12 This is an internal front view of the locking mechanism of the present invention in the non-locking state;

[0031] Figure 13 This is a schematic diagram of the crank state of the locking mechanism of the present invention in the locked state;

[0032] Figure 14 This is a schematic diagram of the crank state of the locking mechanism of the present invention in the non-locking state;

[0033] Figure 15 This is a schematic diagram of the structure of the walking mechanism of the present invention;

[0034] Figure 16This is a schematic diagram of the lateral fixing and limiting mechanism structure of the present invention.

[0035] Figure 17 This is a schematic diagram of the lateral elastic limiting mechanism structure of the present invention.

[0036] Figure 18 This is a schematic diagram of the screw I structure of the present invention.

[0037] Figure 19 This is a schematic diagram of the screw II structure of the present invention. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the figures.

[0039] A type of railway track trolley, please see Figures 1-19 The invention comprises a handle 1, a vehicle body 2, a traveling mechanism 3, a lateral fixing and limiting mechanism 4, and a lateral elastic limiting mechanism 5. The handle 1 is fixed to the traveling mechanism 3 via a quick-lock mechanism. The traveling mechanism 3 is fixed to the vehicle body 2 via screws. The lateral fixing and limiting mechanism 4 is fixed to the vehicle body 2 via screws. The lateral elastic limiting mechanism 5 is fixed to the vehicle body 2 via screws. The vehicle body integrates the handle, traveling mechanism, lateral fixing and limiting mechanism, and lateral elastic limiting mechanism. The traveling mechanism enables the trolley to move on the railway track. The handle is used for hand support to propel the trolley on the railway track. The lateral fixing and limiting mechanisms ensure the lateral position of the trolley on the track, preventing it from deviating from the track and falling off.

[0040] See Figure 2 The handle 1 includes a U-shaped bent rod 1-1, an adapter sleeve 1-2, a locking pin 1-3, a transition sleeve 1-4, a front support rod 1-5, and a rear support rod 1-6. Both the front and rear support rods are L-shaped. The two adapter sleeves 1-2 are respectively fixed to the upper ends of the two front support rods 1-5 with screws. The ends of the vertical bars at both ends of the U-shaped bent rod 1-1 are inserted into the two adapter sleeves and fixed with locking pins, thus connecting the two parallel front support rods 1-5 to the U-shaped bent rod 1-1. The upper ends of the two rear support rods 1-6 are respectively fixed to the lower part of a transition sleeve with screws. The middle parts of the two front support rods are respectively inserted into the inner holes of the two transition sleeves and fixed with screws, thus connecting the two rear support rods to the two front support rods. The front and rear support rods on the same side are fitted at a 90° angle at the upper part.

[0041] See Figure 3 and Figure 4The vehicle body 2 includes a left vehicle body 2-1, a quick-release locking mechanism 2-2, and a right vehicle body 2-3. The left vehicle body 2-1 is connected to the right vehicle body 2-3 through the quick-release locking mechanism 2-2.

[0042] See Figure 5 The quick-release locking mechanism 2-2 includes a locking left part 2-2-1 and a locking right part 2-2-2. The locking left part 2-2-1 is fitted into the left vehicle body near its right end and is fixed to the left vehicle body 2-1 by screws. The locking right part 2-2-2 is fitted into the right vehicle body near its left end and is fixed to the right vehicle body 2-3 by screws.

[0043] See Figure 6 and Figure 7 The locking left part 2-2-1 includes a crank 2-2-1-1, a flange slide groove 2-2-1-2, a mounting body 2-2-1-3, a slide rod 2-2-1-4, a connecting rod 2-2-1-5, a locking spring 2-2-1-6, and a cover 2-2-1-7. The mounting body is rectangular and has three vertical through holes along its vertical direction. The middle vertical through hole is used to insert the connecting rod 2-2-1-5, and the two vertical through holes on either side are used to insert the slide rod. Three horizontal holes are provided on the right side of the mounting body, and these three horizontal holes intersect the three vertical through holes perpendicularly. The connecting rod 2-2-1-5 is inserted into the central vertical through hole. The lower end of the connecting rod 2-2-1-5 is embedded in the eccentric groove at the head of the crank 2-2-1-1. The two are connected by a screw, and the crank 2-2-1-1 can rotate around the screw. The head of the crank 2-2-1-1 contacts and engages with the lower end face of the mounting body 2-2-1-3, and the contact point provides support for the crank 2-2-1-1 during rotation. Two sliding rods are inserted into two vertical through holes on both sides. The upper ends of the two sliding rods and the upper end of the connecting rod are vertically fitted with fastening screws to achieve a fixed connection between the three.

[0044] The lower part of the two sliding rods is integrally provided with a tapered surface 2-2-1-8 that is smaller at the top and larger at the bottom, and a sleeve with a tapered surface is fixed thereon. At the bottom of the mounting body, corresponding to the positions of the vertical through holes on both sides, a cover is fixed, and a locking spring 2-2-1-6 is press-fitted to the upper end of the two covers.

[0045] See Figure 8 The right locking part 2-2-1 includes two locking rods 2-2-2-1 and a mounting plate 2-2-2-2. The two locking rods are inserted into two rod holes on the mounting plate, and the flanges on the two locking rods are fixedly connected to the mounting plate by screws. The left ends of the two locking rods are provided with annular grooves 2-2-2-3, which are used to adapt to the conical shape of the lower end of the two sliding rods to realize the locking connection between the left and right locking parts.

[0046] During the locking assembly of the left and right locking parts, the flange slide groove supports and guides the two locking rods through the lower semi-circular arc plate at the end, facilitating the quick alignment of the left and right locking parts.

[0047] See Figure 15 The traveling unit 3 consists of two sets of traveling units arranged parallel to each other on the left and right sides. Each set of traveling units includes a wheel frame 3-2 and two traveling wheels 3-3 mounted on the front and rear ends of the lower part of the wheel frame. A vehicle body mounting groove is provided in the middle of the upper part of the wheel frame, forming a mounting fit with the corresponding end of the vehicle body and being fixedly connected by screws. Near the two ends of the upper part of the wheel frame, there are protruding locking support blocks 3-1 secured by screws. Handlebar insertion holes are provided on the locking support blocks, and locking slots are provided above the handlebar insertion holes. Screw through holes and threaded holes are provided on both sides of the locking slots. The handlebar insertion holes on the two locking support blocks at the front of the two sets of traveling units engage with the elbows at the lower ends of the two front support rods, and are fixedly connected by locking pins 1-3 installed in the screw through holes and threaded holes at the corresponding locking slots. The handle holes on the two locking support blocks at the rear of the two sets of walking units are respectively fitted with the elbows at the lower ends of the two rear support rods, and are fixedly connected by the screws 1-3 installed in the screw holes and threaded holes at the corresponding locking slots.

[0048] See Figure 16 The lateral fixing and limiting mechanism 4 includes a fixed base 4-1, a screw I 4-2, a locking nut 4-3, a linear bearing assembly 4-4, a crank arm 4-5, a limiting wheel 4-6, and a connecting plate 4-7. The screw I is a rod structure with a smooth guide section in the middle and threads at both ends. The front and rear ends of the connecting plate are fixedly connected to a crank arm, and a linear bearing assembly is fixed to the upper end of each of the two crank arms. The two linear bearing assemblies are respectively guided and fitted through the middle of a screw I. A locking nut is connected to each end of the two screws I outside the two linear bearing assemblies. A fixed base is installed at each end of the two screws I. The fixed bases at both ends of one screw I are fixedly connected to the front side of the right vehicle body by screws, and the fixed bases at both ends of the other screw I are fixedly connected to the rear side of the right vehicle body by screws. Limiting wheels are rotatably installed at the lower ends of the two crank arms. These two limiting wheels form rolling contact with the inner surface of one side of the track.

[0049] See Figure 17 The lateral elastic limiting mechanism 5 includes a fixed base 4-1, a screw II 5-2, a spring I 5-1, a spring II 5-3, a locking nut 4-3, a linear bearing assembly 4-4, a crank arm 4-5, a limiting wheel 4-6, and a connecting plate 4-7.

[0050] The screw II is a rod structure with a smooth guide section in the middle and threads at both ends. The front and rear ends of the connecting plate are fixedly connected to a crank arm. A linear bearing assembly is fixed to the upper end of each of the two crank arms. The two linear bearing assemblies are guided through the middle of the screw II. Springs I and II are respectively fitted onto the two screws II outside the two linear bearing assemblies. Locking nuts are fixed to the two screws II outside springs I and II, achieving elastic compression of springs I and II, thereby achieving elastic compression of the linear bearing assemblies. A fixing seat is installed at each end of the two screws II. The fixing seats at both ends of one screw II are fixedly connected to the front side of the left vehicle body with screws, and the fixing seats at both ends of the other screw II are fixedly connected to the rear side of the left vehicle body with screws. Limiting wheels are rotatably installed at the lower ends of the two crank arms. These two limiting wheels form rolling contact with the inner surface of the track on the other side.

[0051] The front and rear limit wheels of the lateral fixed limit mechanism are fixed position limit wheels along the transverse direction of the track, while the front and rear limit wheels of the lateral elastic limit mechanism are floating limit wheels that can adjust their position left and right along the transverse direction of the track. This ensures that when the railway track trolley travels on the two sides of the track, the track trolley will not experience lateral displacement and thus run unstable, even if the distance between the two sides of the track changes (the change is not large).

[0052] See Figure 18 , Figure 19 The guide section of the screw II 5-2 is longer than the guide section of the screw I 4-2, so the linear bearing assembly can slide on the guide section of the screw II 5-2.

[0053] The principle of rapid connection of the body of a railway track trolley is as follows:

[0054] See Figure 9 , Figure 10 , Figure 13 , Figure 14The locking left part 2-2-1 and the locking right part 2-2-2 cooperate to achieve the locking state of the quick-release locking mechanism 2-2, completing the connection process between the left vehicle body 2-1 and the right vehicle body 2-3. The process is as follows: In the initial position, the distance between the rotation point and the contact point of the crank 2-2-1-1 is d1. Rotating the crank 2-2-1-1 causes the distance between the rotation point and the contact point to become d2, and d1 < d2. This causes the connecting rod 2-2-1-5 to drive the slide rod 2-2-1-4 to compress the locking spring 2-2-1-5 and move downwards. At this time, the position of the crank 2-2-1-1 is fixed and the locking rod 2-2-2 is engaged. -2-1 Slide along the flange groove 2-2-1-2 toward the interior of the locking left part 2-2-1 until the right vehicle body 2-3 contacts the end face of the left vehicle body 2-1. At this time, release the crank 2-2-1-1. Under the action of the rebound force of the locking spring 2-2-1-5, the slide rod 2-2-1-4 moves upward, so that the conical surface of the slide rod 2-2-1-4 contacts the groove of the locking rod 2-2-2-1. At this time, the locking left part 2-2-1 and the locking right part 2-2-2 are engaged. The rebound force of the locking spring 2-2-1-5 ensures that the contact and engagement of the locking left part 2-2-1 and the locking right part 2-2-2 is stable.

[0055] The principle of rapid disassembly of a railway track trolley is as follows:

[0056] See Figure 11 , Figure 12 , Figure 13 , Figure 14The locking left part 2-2-1 can be released from the locking right part 2-2-2, achieving the unlocked state of the quick-release locking mechanism 2-2, completing the disassembly process of the left vehicle body 2-1 and the right vehicle body 2-2. The process is as follows: In the initial position, the distance between the rotation point and the contact point of the crank 2-2-1-1 is d1. Rotating the crank 2-2-1-1, since the distance between the rotation point and the contact point of the crank 2-2-1-1 becomes d2, and d1 < d2, causes the connecting rod 2-2-1-5 to drive the slide rod 2-2-1-4 to compress the locking spring 2-2-1-5 and move downward. At this time, the slide rod 2-2- The conical surface of 1-4 does not contact the groove of the locking rod 2-2-2-1, fixing the position of the crank 2-2-1-1 and making the locking rod 2-2-2-1 slide along the flange slide groove 2-2-1-2 towards the outside of the locking left part 2-2-1 until the right vehicle body 2-3 is completely separated from the left vehicle body 2-1. At this time, the crank 2-2-1-1 is released, and under the rebound force of the locking action spring 2-2-1-5, the slide rod 2-2-1-4 moves upward to the initial position. At this time, the locking left part 2-2-1 can be released from the locking right part 2-2-2, achieving the unlocked state of the quick-release locking mechanism 2-2.

[0057] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above figures and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A railway track trolley, characterized in that: Includes handles, vehicle body, running gear, lateral fixed limiting mechanism, and lateral elastic limiting mechanism; The vehicle body is composed of a left vehicle body and a right vehicle body connected by a quick-release locking mechanism; The walking unit consists of two sets of walking units arranged on the left and right. Each set of walking units includes a wheel frame and two walking wheels installed at the front and rear ends of the lower part of the wheel frame. The left part of the left vehicle body is fixedly connected to the middle part of the wheel frame of the left walking unit, and the right part of the right vehicle body is fixedly connected to the middle part of the wheel frame of the right walking unit. The handle includes a U-shaped bend, two front support rods, and two rear support rods. The ends of the vertical rods at both ends of the U-shaped bend are fixedly connected to the upper ends of the two front support rods through adapter sleeves and locking pins, respectively. The middle parts of the two front support rods are fixedly connected to the upper ends of the two rear support rods through transition sleeves and screws, respectively. The lower bends of the two front support rods are fixedly connected to the locking support blocks at the upper front end of the corresponding wheel frame, respectively. The lower bends of the two rear support rods are fixedly connected to the locking support blocks at the upper rear end of the corresponding wheel frame, respectively. The lateral fixed limiting mechanism and the lateral elastic limiting mechanism are fixedly connected to the right car body and the left car body, respectively. The lateral fixed limiting mechanism makes rolling contact with the inner side of one side of the track through two limiting wheels set in front and behind it, and the lateral elastic limiting mechanism makes rolling contact with the inner side of the other side of the track through two limiting wheels set in front and behind it, thereby realizing the lateral limiting of the car on the track. The quick-release locking mechanism includes a locking left part and a locking right part; The locking left part includes a crank, a mounting body, slide rods, a connecting rod, a locking spring, and a cover. The mounting body has three vertical through holes along the vertical direction and three horizontal holes on the right side of the mounting body. The connecting rod passes through the middle vertical through hole, and the lower end of the connecting rod is embedded in the eccentric groove at the head of the crank, and the two are connected by a screw. The crank can rotate around the screw. The two slide rods pass through the two vertical through holes on both sides, and the upper ends of the two slide rods and the upper ends of the connecting rod are vertically fitted with fastening screws to achieve a fixed connection of the three. The lower part of the two slide rods is integrally provided with a tapered surface that is smaller at the top and larger at the bottom, and a sleeve with a tapered surface is fixed thereon. A cover is fixed at the bottom of the mounting body at the position corresponding to the two vertical through holes on both sides, and a locking spring is pressed onto the upper end of the two covers. The right locking part includes two locking rods and a mounting plate. The left ends of the two locking rods are provided with annular grooves, which are adapted to the conical shape of the lower ends of the two sliding rods to realize the locking connection between the left locking part and the right locking part.

2. The railway track trolley according to claim 1, characterized in that: The left locking part is fitted into the left vehicle body near its right end and is fixed to the left vehicle body; the right locking part is fitted into the right vehicle body near its left end and is fixed to the right vehicle body. The locking left part also includes a flange groove; the mounting body is rectangular; the three horizontal holes intersect the three vertical through holes perpendicularly; the head of the crank is in contact with the lower end face of the mounting body; the two locking rods are inserted and fixed in the two rod holes on the mounting plate.

3. The railway track trolley according to claim 1, characterized in that: The lateral fixing and limiting mechanism also includes a fixed seat, screw I, a locking nut, a linear bearing assembly, a crank arm, and a connecting plate. Screw I is a rod structure with a smooth guide section in the middle and threads at both ends. The front and rear ends of the connecting plate are respectively fixedly connected to a crank arm. A linear bearing assembly is fixedly fixed to the upper end of each of the two crank arms. The two linear bearing assemblies are respectively guided and fitted through the middle of a screw I. A locking nut is connected to each of the two screw I at the outer ends of the two linear bearing assemblies. A fixed seat is installed at each end of the two screws I. The fixed seats at both ends of one screw I are fixedly connected to the front side of the right vehicle body, and the fixed seats at both ends of the other screw I are fixedly connected to the rear side of the right vehicle body. Limiting wheels are rotatably installed at the lower ends of the two crank arms, and these two limiting wheels form rolling contact with the inner side of one side of the track.

4. The railway track trolley according to claim 1, characterized in that: The lateral elastic limiting mechanism includes a fixed base, screw II, spring I, spring II, locking nut, linear bearing assembly, crank arm, limiting wheel, and connecting plate. Screw II is a rod structure with a smooth guide section in the middle and threads at both ends. The front and rear ends of the connecting plate are fixedly connected to a crank arm, and a linear bearing assembly is fixed to the upper end of each crank arm. The two linear bearing assemblies are guided and fitted through the middle of screw II. Spring I and spring II are respectively fitted on the two screw II outside the two linear bearing assemblies. Locking nuts are fixed on the two screw II outside spring I and spring II to achieve elastic compression of spring I and spring II. A fixed base is installed at each end of the two screw II. The fixed base at both ends of one screw II is fixedly connected to the front side of the left vehicle body by screws, and the fixed base at both ends of the other screw II is fixedly connected to the rear side of the left vehicle body by screws. Limiting wheels are rotatably installed at the lower ends of the two crank arms, and these two limiting wheels form rolling contact with the inner side of the track on the other side.

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