Coaxial double-sided operating gap iron

Abstract

The application discloses a coaxial double-side operation interval iron, relates to the technical field of transporting rails, and comprises a double-side operation interval iron, a rolling track steel beam, a first stand column, a second stand column and a rocker, the double-side operation interval iron is installed on the rolling track steel beam, the rolling track steel beam is installed on the first stand column and the second stand column, the first stand column and the second stand column are fixed on a rail transport vehicle, the rolling track steel beam can be rotated by 90 degrees around the first stand column to be opened, and a cross-shaped protrusion is arranged on the connecting end of the rocker. The interval iron, the interval iron shaft and the interval iron operating rod are reasonably arranged, the interval iron is fixedly welded with the interval iron shaft, the interval iron operating rod is fixed on the stand column through a mounting plate, the interval iron operating rod is connected with the interval iron shaft through a connecting shaft, the interval iron operating rod can drive the interval iron shaft to rotate by 90 degrees, the interval iron can be laid flat and erected, the interval iron operating rod can be locked when the interval iron is erected, and the interval iron is prevented from being laid flat freely.

Description

Technical Field

[0001] This invention relates to the field of transport rail technology, and in particular to a coaxial double-sided operating spacer. Background Technology

[0002] Steel rails are the main component of railway tracks. Their function is to guide the wheels of locomotives and rolling stock, bear the enormous pressure of the wheels, and transmit this pressure to the sleepers. Steel rails must provide the wheels with a continuous, smooth, and least resistance-prone rolling surface. In electrified railways or automatic block signaling sections, steel rails can also serve as track circuits.

[0003] When transporting rails using long-rail train sets, spacer devices are specialized equipment to prevent lateral shifting of the rails during transport. These spacer devices are installed on the rail transport vehicle, which has three sets of roller beams: one set in the middle of the vehicle and one set at each end. Each set of roller beams is fixed to pillars on both sides of the vehicle body, consisting of four beams in four layers. The roller beams can rotate 90° around one side pillar to meet the requirements of rail loading operations. The spacer devices are installed on the middle set of roller beams, but the spacer control lever is mounted on a pillar on one side of the vehicle body. The spacer devices can only be operated from this side. When working on the track, if there is an adjacent track on this side, and a vehicle may pass through at any time, the spacer devices must be operated. The current system presents significant safety hazards. The dual-sided operation of the spacer device involves several steps: inserting a rocker arm into the opening of a column to connect with the spacer shaft and rotate it 90° to raise the spacer; then removing the rocker arm from one opening and inserting it into another, connecting it to the drive shaft, and rotating it several more times to lock it. Similarly, to lower the spacer, the rocker arm must be inserted into the opening of a column and connected to the drive shaft, rotated several times to unlock, and then removed and inserted into another opening, rotating it 90° to lower it. This process of raising and lowering the spacer requires inserting the rocker arm twice and rotating it multiple times, making the operation cumbersome and inefficient. Furthermore, the drive shaft lacks a design to prevent accidental rotation; vehicle vibrations can easily cause accidental rotation and unlocking, resulting in loss of lock on the spacer and potentially causing lateral misalignment of the transport rails, affecting the safe operation of long-rail trains. Therefore, this application provides a coaxial dual-sided operation spacer to meet these requirements. Summary of the Invention

[0004] The purpose of this application is to provide a coaxial double-sided operating spacer, which consists of a spacer, a spacer shaft, and a spacer control lever. The spacer is welded and fixed to the spacer shaft. The spacer control lever is fixed to the column by a mounting plate and connected to the spacer shaft by a connecting shaft. The spacer control lever can drive the spacer shaft to rotate 90° to realize the flattening and erection of the spacer. When erected, the spacer control lever can be locked to prevent the spacer from being laid flat freely.

[0005] To achieve the above objectives, this application provides the following technical solution: a coaxial double-sided operating spacer, comprising a double-sided operating spacer, a roller rail, a first column, a second column, and a rocker arm. The double-sided operating spacer is mounted on the roller rail, the roller rail is mounted on the first column and the second column, the first column and the second column are fixed on a rail transport vehicle, the roller rail can be rotated 90° around the first column to open, and the connecting end of the rocker arm is provided with a cross-shaped protrusion.

[0006] The double-sided operating spacer includes a first spacer, a double-sided operating transmission locking mechanism, a support plate, a washer, a stop block, and a first cotter pin;

[0007] A dual-sided operating transmission locking mechanism is inserted into the first spacer, the first spacer is inserted into the support plate, the support plate is fixed on the raceway steel beam, the dual-sided operating transmission locking mechanism and the first spacer can rotate around the axis, and the stop block is welded to the support plate.

[0008] Preferably, the first spacer includes a spacer shaft and a second spacer, the second spacer is welded to the spacer shaft, the spacer shaft is fixed by the support plate, and a washer is provided between the second spacer and the support plate.

[0009] Preferably, when the second spacer is upright and flat, it abuts against the stop block, allowing the spacer to rotate within a 90° range around its axis. The spacer shaft is made of steel pipe material, and an opening is provided at the end of the spacer shaft.

[0010] Preferably, the dual-sided operation transmission locking mechanism includes a drive shaft, a ratchet, and a pawl lock.

[0011] Preferably, the transmission shaft includes a perforated shaft, a connecting shaft, a cam shaft, and a counterweight. One end of the perforated shaft and the cam shaft are provided with a cross-shaped groove. After the rocker arm is inserted, it can drive the transmission shaft to rotate. The other end of the perforated shaft is provided with a hole. The cross-section of the perforated shaft is a fan-shaped area. The perforated shaft and the spacer iron shaft are connected by the first cotter pin. The perforated shaft can drive the spacer iron shaft to rotate only after rotating a certain angle and continuing to rotate. The cam shaft is provided with a disc cam structure.

[0012] Preferably, the connecting shaft is made of steel pipe material, and the connecting shaft is welded and fixed to the perforated shaft and the cam shaft. The counterweight makes the center of gravity of the transmission shaft biased to one side of the counterweight, which can prevent the transmission shaft from rotating accidentally and causing the double-sided operating spacer to unlock.

[0013] Preferably, the ratchet has several toothed grooves around its periphery, the ratchet is sleeved on the camshaft, the ratchet is welded and fixed to the spacer iron shaft, and the ratchet can drive the spacer iron shaft to rotate.

[0014] Preferably, the ratchet lock includes a ratchet tooth, a torsion spring, a mounting plate, a pivot pin, and a second cotter pin. The ratchet tooth and the torsion spring are mounted on the mounting plate via the pivot pin and the second cotter pin. The ratchet tooth is rotatable along the axis, and the mounting plate is fixed to the raceway steel beam.

[0015] Preferably, one end of the pawl tooth is provided with a ratchet tooth, and both ends of the pawl tooth are driven by the cam structure of the cam shaft. When the cam shaft rotates, the cam structure can drive the pawl tooth to rotate, controlling the ratchet tooth to mesh with the ratchet wheel. Under the action of torque, the torsion spring can make one end of the ratchet tooth abut against the cam shaft and the ratchet wheel. The end of the pawl tooth without a ratchet tooth abuts against the cam shaft when the pawl tooth meshes with the ratchet wheel, which can prevent the torsion spring from failing and ensure reliable meshing between the pawl tooth and the ratchet wheel.

[0016] In summary, the technical effects and advantages of this invention are as follows:

[0017] 1. The present invention has a reasonable structure. During the assembly and unloading of rails on a long rail car, it is necessary to operate the double-sided operating spacers from the locked working state to the non-working state. The non-working state is as follows: Figure 14 As shown, a rocker arm passes through the first or second column and connects to the perforated shaft or camshaft. Rotating the rocker arm counterclockwise causes the drive shaft to rotate counterclockwise. Under the action of the cam on the camshaft, the pawl rotates counterclockwise, separating the pawl's teeth from the ratchet wheel, thus releasing the locking mechanism of the spacer shaft. The state is as follows. Figure 13 As shown, during this process, the rotation of the drive shaft does not drive the spacer to rotate. Continuing to rotate the rocker counterclockwise drives the drive shaft to rotate counterclockwise. The drive shaft drives the spacer to rotate through the cotter pin, causing the spacer to lie flat and abut against the stop block, preventing it from rotating further. This coaxial double-sided operating spacer device uses a coaxial design for the drive shaft and spacer shaft, and adopts a cam and ratchet structure. It has a compact structure, occupies little space, is simple and quick to operate, and has a safe and reliable locking mechanism. It is suitable for retrofitting existing spacer devices, with minimal retrofitting workload and low cost.

[0018] 2. In this invention, to switch the operating spacer on both sides from the non-working state to the locked working state, the rocker arm needs to be rotated clockwise, which will cause the transmission shaft to rotate clockwise by a certain angle, such as... Figure 15 As shown, continue to rotate the rocker arm clockwise, which drives the drive shaft to rotate clockwise. The drive shaft drives the spacer to rotate through the cotter pin, so that the spacer stands up and abuts against the stop block and cannot continue to rotate. At the same time, under the action of the torsion spring and the camshaft, the ratchet teeth of the pawl mesh with the ratchet wheel, so that the spacer is locked and cannot rotate.

[0019] 3. In this invention, the smaller radius of the camshaft abuts against one end of the pawl and ratchet teeth, while the larger radius of the camshaft abuts against the other end of the pawl. Under the action of the torsion spring and the camshaft, the ratchet teeth of the pawl mesh with the ratchet wheel, preventing the ratchet wheel from rotating counterclockwise. Therefore, the spacer is in an upright state and cannot rotate. The counterweight causes the center of gravity of the drive shaft to be biased to one side of the counterweight, which can prevent the drive shaft from rotating unexpectedly due to vehicle vibration, thus unlocking the spacer assembly on both sides. This allows for independent operation of the spacer device on both sides of the vehicle, avoiding safety hazards of operating near the work site and improving the safety of the operators. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the assembly of a coaxial double-sided operating spacer device;

[0022] Figure 2 This is a schematic diagram of the double-sided operating spacer.

[0023] Figure 3 This is a schematic diagram of the spacer iron composition;

[0024] Figure 4 This is a schematic diagram of a dual-sided operating transmission locking mechanism;

[0025] Figure 5 This is a schematic diagram of the drive shaft;

[0026] Figure 6 This is a schematic diagram of the drive shaft;

[0027] Figure 7 This is a schematic diagram of a camshaft;

[0028] Figure 8 This is a diagram of a ratchet;

[0029] Figure 9 This is a schematic diagram of a ratchet lock;

[0030] Figure 10 This is a diagram of a pawl;

[0031] Figure 11 This is a schematic diagram of a torsion spring;

[0032] Figure 12 This is a schematic diagram of the locking working state composed of double-sided operating spacers;

[0033] Figure 13This is a schematic diagram showing the unlocked state of the double-sided operating spacer.

[0034] Figure 14 This is a schematic diagram of the non-working state composed of double-sided operating spacers;

[0035] Figure 15 This is a schematic diagram of the state before locking, formed by the double-sided operating spacer.

[0036] In the diagram: 1. Double-sided operating spacer; 2. Roller beam; 3. First column; 4. Second column; 5. Rocker arm; 11. First spacer; 12. Double-sided operating transmission locking mechanism; 13. Support plate; 14. Washer; 15. Stop block; 16. Cotter pin; 111. Spacer shaft; 112. Second spacer; 121. Drive shaft; 122. Ratchet; 123. Pawl lock; 1211. Hole shaft; 1212. Connecting shaft; 1213. Camshaft; 1214. Counterweight; 1231. Pawl; 1232. Torsion spring; 1233. Mounting plate; 1234. Shaft pin; 1235. Cotter pin. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example: Reference Figure 1-5 The diagram shows a coaxial double-sided operating spacer, comprising a double-sided operating spacer 1, a roller beam 2, a first column 3, a second column 4, and a rocker arm 5. The double-sided operating spacer 1 is mounted on the roller beam 2, which is mounted on the first column 3 and the second column 4. The first column 3 and the second column 4 are fixed to a rail carrier. The roller beam 2 can be rotated 90° around the first column 3 to open. The connecting end of the rocker arm 5 is provided with a cross-shaped protrusion. The double-sided operating spacer 1 includes a first spacer 11, a double-sided operating transmission locking mechanism 12, a support plate 13, a washer 14, a stop block 15, and a first cotter pin 16. The double-sided operating transmission locking mechanism 12 is inserted into the first spacer 11, which is inserted into the support plate 13. The support plate 13 is fixed to the roller beam 2. The double-sided operating transmission locking mechanism 12 and the first spacer 11 can rotate around an axis. The stop block 15 is welded to the support plate 13.

[0039] Specifically, when transporting rails on long-rail trains, the double-sided operating spacer 1 is in a locked working state, such as... Figure 12As shown, at this time, the spacer 112 is in an upright state, abutting against the stop block 15 and cannot rotate clockwise. Observed from the camshaft 1213 side, the same applies below. The smaller radius of the camshaft 1213 abuts against one end of the ratchet tooth of the pawl 1231, and the larger radius of the camshaft 1213 abuts against the other end of the pawl 1231. Under the action of the torsion spring 1232 and the camshaft 1213, the ratchet tooth of the pawl 1231 meshes with the ratchet wheel 122, making the ratchet wheel 122 unable to rotate counterclockwise. Therefore, at this time, the spacer 112 is in an upright state and cannot rotate. The counterweight 1214 causes the center of gravity of the drive shaft 121 to be biased towards the counterweight 1214 side, which can prevent the drive shaft 121 from rotating unexpectedly due to vehicle vibration, thus unlocking the spacer 1 on both sides.

[0040] As one embodiment of this example, as shown in Figures 6, 7, and 8, the first spacer 11 includes a spacer shaft 111 and a second spacer 112. The second spacer 112 is welded to the spacer shaft 111, and the spacer shaft 111 is fixed by a support plate 13. A washer 14 is provided between the second spacer 112 and the support plate 13. When the second spacer 112 is upright and flat, it abuts against the stop block 15, allowing the spacer 11 to rotate around its axis within a 90° range. The spacer shaft 111 is made of steel pipe material, and an opening is provided at the end of the spacer shaft 111.

[0041] Specifically, during the assembly and unloading of rails on the long rail car, it is necessary to operate the double-sided operating spacer to switch from the locked working state to the non-working state. The non-working state is as follows: Figure 14 As shown, a rocker arm 5 passes through the first column 3 or the second column 4 and connects to the perforated shaft 1211 or the camshaft 1213. Rotating the rocker arm 5 counterclockwise causes the transmission shaft 121 to rotate counterclockwise. Under the action of the cam on the camshaft 1213, the pawl 1231 rotates counterclockwise, and the ratchet teeth of the pawl 1231 separate from the ratchet wheel 122. The spacer iron shaft 111 is then unlocked, and the state is as follows. Figure 13 As shown, during this process, the rotation of the drive shaft 121 does not drive the spacer assembly 11 to rotate. Continue to rotate the rocker arm 5 counterclockwise, which drives the drive shaft 121 to rotate counterclockwise. The drive shaft 121 drives the spacer assembly 11 to rotate through the cotter pin 16, so that the spacer 112 is laid flat and abuts against the stop block 15 and cannot continue to rotate.

[0042] As one implementation method in this embodiment, according to the appendix Figure 9 , 10As shown in Figure 11, the dual-sided operation transmission locking mechanism 12 includes a transmission shaft 121, a ratchet 122, and a pawl lock 123. The transmission shaft 121 includes a perforated shaft 1211, a connecting shaft 1212, a cam shaft 1213, and a counterweight 1214. One end of the perforated shaft 1211 and the cam shaft 1213 is provided with a cross-shaped groove. After the rocker arm 5 is inserted, it can drive the transmission shaft 121 to rotate. The other end of the perforated shaft 1211 is provided with a hole. The cross section of the perforated shaft 1211 is two fan-shaped areas. The perforated shaft 1211 and the connecting shaft 1214 are connected to the connecting shaft 1215. The spacer shaft 111 is connected by a first cotter pin 16. The spacer shaft 111 can only be driven to rotate after the perforated shaft 1211 rotates a certain angle and continues to rotate. The cam shaft 1213 is equipped with a disc cam structure. The connecting shaft 1212 is made of steel pipe material. The connecting shaft 1212 is welded and fixed to the perforated shaft 1211 and the cam shaft 1213. The counterweight 1214 makes the center of gravity of the transmission shaft 121 biased to one side of the counterweight 1214, which can prevent the transmission shaft 121 from rotating accidentally and causing the spacer 1 on both sides to be unlocked.

[0043] Specifically, to switch the operating spacer 1 from the non-working state to the locked working state, the rocker arm 5 needs to be rotated clockwise, which will drive the transmission shaft 121 to rotate clockwise by a certain angle, such as... Figure 15 As shown, continue to rotate the rocker arm 5 clockwise, which drives the drive shaft 121 to rotate clockwise. The drive shaft 121 drives the spacer assembly 11 to rotate through the cotter pin 16, so that the spacer 112 stands up and abuts against the stop block 15 and cannot continue to rotate. At the same time, under the action of the torsion spring 1232 and the camshaft 1213, the ratchet teeth of the pawl 1231 engage with the ratchet wheel 122, so that the spacer 112 is locked and cannot rotate.

[0044] As one implementation method in this embodiment, according to the appendix Figure 12 , 13 As shown in Figures 14 and 15, the ratchet lock 123 includes a ratchet tooth 1231, a torsion spring 1232, a mounting plate 1233, a shaft pin 1234, and a second cotter pin 1235. The ratchet tooth 1231 and the torsion spring 1232 are mounted on the mounting plate 1233 via the shaft pin 1234 and the second cotter pin 1235. The ratchet tooth 1231 can rotate along the axis. The mounting plate 1233 is fixed to the raceway steel beam 2. One end of the ratchet tooth 1231 is provided with a ratchet tooth, and both ends of the ratchet tooth 1231 are driven by the camshaft 1213. The cam structure allows the pawl tooth 1231 to rotate when the cam shaft 1213 rotates, controlling the ratchet teeth on the pawl tooth 1231 to mesh with the ratchet wheel 122. Under the action of torque, the torsion spring 1232 can cause one end of the ratchet teeth of the pawl tooth 1231 to abut against the cam shaft 1213 and the ratchet wheel 122. The end of the pawl tooth 1231 without ratchet teeth abuts against the cam shaft 1213 when the pawl tooth 1231 meshes with the ratchet wheel 122, which can prevent the torsion spring 1232 from failing and ensure reliable meshing between the pawl tooth 1231 and the ratchet wheel 122.

[0045] Specifically, the smaller radius of the camshaft 1213 contacts one end of the ratchet tooth of the pawl 1231, and the larger radius of the camshaft 1213 contacts the other end of the pawl 1231. Under the action of the torsion spring 1232 and the camshaft 1213, the ratchet tooth of the pawl 1231 meshes with the ratchet wheel 122, making the ratchet wheel 122 unable to rotate counterclockwise. Therefore, the spacer 112 is in an upright state and cannot rotate. The counterweight 1214 makes the center of gravity of the drive shaft 121 biased to one side of the counterweight 1214, which can prevent the drive shaft 121 from rotating accidentally due to vehicle vibration, etc., and thus unlocking the double-sided operating spacer assembly 1.

[0046] The working principle of this invention is as follows: During the assembly and unloading of rails on a long rail car, it is necessary to operate the double-sided operating spacer block 1 from the locked working state to the non-working state. The non-working state is as follows: Figure 14 As shown, a rocker arm 5 passes through the first column 3 or the second column 4 and connects to the perforated shaft 1211 or the camshaft 1213. Rotating the rocker arm 5 counterclockwise causes the transmission shaft 121 to rotate counterclockwise. Under the action of the cam on the camshaft 1213, the pawl 1231 rotates counterclockwise, and the ratchet teeth of the pawl 1231 separate from the ratchet wheel 122. The spacer iron shaft 111 is then unlocked, and the state is as follows. Figure 13 As shown, during this process, the rotation of the drive shaft 121 does not drive the spacer assembly 11 to rotate. Continue to rotate the rocker arm 5 counterclockwise, which drives the drive shaft 121 to rotate counterclockwise. The drive shaft 121 drives the spacer assembly 11 to rotate through the cotter pin 16, so that the spacer 112 is laid flat and abuts against the stop block 15 and cannot continue to rotate.

[0047] To switch the operating mechanism 1 from its non-operating state to its locked operating state, the rocker arm 5 needs to be rotated clockwise, causing the transmission shaft 121 to rotate clockwise by a certain angle. Figure 15 As shown, continue to rotate the rocker arm 5 clockwise, which drives the drive shaft 121 to rotate clockwise. The drive shaft 121 drives the spacer assembly 11 to rotate through the cotter pin 16, so that the spacer 112 stands up and abuts against the stop block 15 and cannot continue to rotate. At the same time, under the action of the torsion spring 1232 and the camshaft 1213, the ratchet teeth of the pawl 1231 mesh with the ratchet wheel 122, so that the spacer 112 is locked and cannot rotate.

[0048] The smaller radius of the camshaft 1213 contacts one end of the ratchet tooth of the pawl 1231, and the larger radius of the camshaft 1213 contacts the other end of the pawl 1231. Under the action of the torsion spring 1232 and the camshaft 1213, the ratchet tooth of the pawl 1231 meshes with the ratchet wheel 122, making the ratchet wheel 122 unable to rotate counterclockwise. Therefore, the spacer 112 is in an upright state and cannot rotate. The counterweight 1214 makes the center of gravity of the drive shaft 121 biased to one side of the counterweight 1214, which can prevent the drive shaft 121 from rotating accidentally due to vehicle vibration, etc., and thus unlocking the double-sided operating spacer 1.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coaxial double-sided operating gap iron comprising a double-sided operating gap iron (1), a raceway steel beam (2), a first upright column (3), a second upright column (4), a rocker (5), characterized in that, The double-side operation interval iron (1) is installed on the rolling track steel beam (2), the rolling track steel beam (2) is installed on the first stand column (3) and the second stand column (4), the first stand column (3) and the second stand column (4) are fixed on the rail car, the rolling track steel beam (2) can be rotated 90° to open around the first stand column (3), and the connecting end of the rocker (5) is provided with a cross-shaped protrusion. The double-side operation interval iron (1) comprises a first interval iron (11), a double-side operation transmission locking mechanism (12), a support plate (13), a gasket (14), a stop block (15) and a first split pin (16). The double-side operation transmission locking mechanism (12) is inserted in the first interval iron (11), the first interval iron (11) is inserted in the support plate (13), the support plate (13) is fixed on the rolling track steel beam (2), the double-side operation transmission locking mechanism (12) and the first interval iron (11) can rotate around an axis, and the stop block (15) is welded on the support plate (13). The double-side operation transmission locking mechanism (12) comprises a transmission shaft (121), a ratchet wheel (122) and a pawl lock (123); the transmission shaft (121) comprises a hole shaft (1211), a connecting shaft (1212), a cam shaft (1213) and a counterweight (1214), one end of the hole shaft (1211) and the cam shaft (1213) is provided with a cross-shaped groove, the rocker (5) is inserted and can drive the transmission shaft (121) to rotate, the other end of the hole shaft (1211) is provided with a hole, the hole shaft (1211) is provided with two sector regions, the hole shaft (1211) is connected with the interval iron shaft (111) by the first split pin (16), the hole shaft (1211) can drive the interval iron shaft (111) to rotate only after rotating a certain angle, and the cam shaft (1213) is provided with a disc-shaped cam structure; the ratchet wheel (122) is provided with a plurality of tooth-shaped grooves around, the ratchet wheel (122) is sleeved on the cam shaft (1213), and the pawl lock (123) comprises a pawl tooth (1231), a torsion spring (1232), a mounting plate (1233), a shaft pin (1234) and a second split pin (1235); the pawl tooth (1231) and the torsion spring (1232) are mounted on the mounting plate (1233) through the shaft pin (1234) and the second split pin (1235), the pawl tooth (1231) can rotate along an axis, the mounting plate (1233) is fixed on the rolling track steel beam (2), one end of the pawl tooth (1231) is provided with a ratchet tooth, and both ends of the pawl tooth (1231) are driven by the cam structure of the cam shaft (1213).

2. A coaxial double-sided operating gap according to claim 1, characterized in that: The first interval iron (11) comprises an interval iron shaft (111) and a second interval iron (112), the second interval iron (112) is welded on the interval iron shaft (111), the interval iron shaft (111) is fixed through the support plate (13), and the second interval iron (112) and the support plate (13) are provided with the gasket (14).

3. A coaxial double-sided operating gap according to claim 2, characterized in that: The second spacing iron (112) is in contact with the stopper (15) when it is raised and lowered, and the first spacing iron (11) can rotate around the axis within a range of 90°. The spacing iron shaft (111) is made of steel pipe material, and the end of the spacing iron shaft (111) is provided with an opening.

4. The coaxial double-sided operating gap of claim 1, wherein: The connecting shaft (1212) is made of steel pipe material, and is welded and fixed with the opening shaft (1211) and the cam shaft (1213). The counterweight (1214) makes the gravity center of the transmission shaft (121) deviate to one side of the counterweight (1214), so that the accidental rotation of the transmission shaft (121) can be prevented to cause the unlocking of the double-side operation spacing iron (1).

5. The coaxial double-sided operating gap of claim 1, wherein: When the cam shaft (1213) rotates, the ratchet tooth (1231) can be driven to rotate through the cam structure, the ratchet tooth on the ratchet tooth (1231) is controlled to mesh with the ratchet wheel (122), the torsional spring (1232) can make one end of the ratchet tooth (1231) abut against the cam shaft (1213) and the ratchet wheel (122) under the action of torque, and the end without ratchet tooth of the ratchet tooth (1231) abuts against the cam shaft (1213) when the ratchet tooth (1231) meshes with the ratchet wheel (122), so that the failure of the torsional spring (1232) can be prevented, and the reliable meshing of the ratchet tooth (1231) and the ratchet wheel (122) can be ensured.

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