Pavement gear ring self-locking device

Abstract

The utility model provides a road surface gear ring self-locking device, and relates to the field of gear ring self-locking. The road surface gear ring self-locking device comprises a mounting base, an outer pulling force application rod assembly, a traction pull rod assembly, a dead angle self-locking connecting rod mechanism, a sliding lock tooth assembly and an inner slide way block. The lower end of the dead angle self-locking connecting rod mechanism swings rightwards along with the movement of the traction pull rod assembly, the dead angle self-locking connecting rod mechanism forms dead angle self-locking, the sliding lock tooth assembly cannot push the dead angle self-locking connecting rod mechanism to move, the end of the sliding lock tooth assembly is kept in the tooth state of being meshed with the gear ring, and the purpose of locking the oval winding drum is achieved by locking the gear ring. The pavement slab state is kept stable; and the sliding lock tooth assembly cannot push the dead angle self-locking connecting rod mechanism to move, so that the end part of the sliding lock tooth assembly keeps a state of being meshed with the teeth of the gear ring, the teeth of the gear ring cannot push the sliding lock tooth assembly to slide into the inner slideway block along with bumping, and the state that the end part of the sliding lock tooth assembly is meshed with the teeth of the gear ring is automatically released.

Description

TECHNICAL FIELD

[0001] The utility model relates to tooth ring self locking technical field, more particularly to a road surface tooth ring self locking device. BACKGROUND

[0002] The road surface working equipment is a kind of equipment that lays road panel quickly in muddy road, sandy ground and other places inconvenient for vehicle to travel, so that vehicle can travel on the laid road panel, currently, road panel laying is laid by gradually releasing road panel by oval winding drum, and oval winding drum drives the gear wheel by hydraulic motor, and the gear wheel drives the tooth ring arranged at both ends of oval winding drum by gear meshing principle, but when it is needed to pause oval winding drum for road panel take-up operation, oval winding drum will rotate under the eccentric gravity of road panel and the gravity drag of the road panel already released, and it is inconvenient to realize the locking of oval winding drum to keep the stability of road panel state becomes a technical problem to be solved. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in the prior art is solved.For this purpose, the utility model provides a road surface tooth ring self locking device, the road surface tooth ring self locking device reaches the purpose of locking oval winding drum by locking tooth ring, and further reaches the effect of keeping the stability of road panel state, and dead angle self locking is formed by dead angle self locking connecting rod mechanism for sliding lock tooth assembly, and the condition that sliding lock tooth assembly engages tooth ring gear teeth is automatically released is reduced.

[0004] According to the road surface tooth ring self locking device of the utility model embodiment, it includes: mounting seat, outer pull force applying rod assembly, traction pull rod assembly, dead angle self locking connecting rod mechanism, sliding lock tooth assembly and inner slide block.

[0005] The outer pull force applying rod assembly is connected to the lower side of the rear end of the mounting seat, one end of the traction pull rod assembly is hinged to the outer pull force applying rod assembly, the dead angle self locking connecting rod mechanism is connected to the lower side of the mounting seat, the other end of the traction pull rod assembly is hinged to the lower end of the dead angle self locking connecting rod mechanism, the lower end of the sliding lock tooth assembly is hinged to the right end of the dead angle self locking connecting rod mechanism, the dead angle self locking connecting rod mechanism can form dead angle self locking, so that the sliding lock tooth assembly cannot push the dead angle self locking connecting rod mechanism to move, the inner slide block is fixedly connected to the right side of the mounting seat, the upper end of the sliding lock tooth assembly is slidably penetrated through the inside of the inner slide block, and the end portion of the sliding lock tooth assembly can be engaged with the gear teeth of the tooth ring.

[0006] According to some embodiments of the utility model, the outer pull force bar assembly includes handheld rod, outer pull force bar, fixed shaft and rotating cylinder, the handheld rod fixed connection in the outer pull force bar bottom end, the outer pull force bar is set up with the pin joint hole, the traction pull rod assembly one end is hinged in the pin joint hole, the fixed shaft fixed connection in the mounting seat rear end's downside, the rotating cylinder rotation sleeve joint in the fixed shaft, the outer pull force bar drives the rotating cylinder rotates around the fixed shaft, the outer pull force bar upper end is hinged in the rotating cylinder downside, the outer pull force bar rotates around the rotating cylinder downside left and right swing.

[0007] According to some embodiments of the utility model, the traction pull rod assembly includes traction pull rod, first ear seat and second ear seat, the first ear seat and the second ear seat are connected in the traction pull rod both ends, the first ear seat is hinged in the outer pull force bar assembly, the second ear seat is hinged in the dead angle self-locking link mechanism lower end.

[0008] According to some embodiments of the utility model, the dead angle self-locking link mechanism includes base, main swing rod, main connecting rod, auxiliary connecting rod and traction connecting rod, the base fixed connection in the mounting seat downside, the base downside is set up with the installation slot that is inclined from left to right to the top, the main swing rod upper end is hinged in the installation slot upper end, the main swing rod lower end is hinged in the traction pull rod assembly one end, the main connecting rod left end is hinged in the installation slot lower end, the traction connecting rod lower end is hinged in the main connecting rod right end, the traction connecting rod upper end is hinged in the sliding lock tooth assembly lower end, the auxiliary connecting rod upper end is hinged in the main connecting rod, the auxiliary connecting rod lower end is hinged in the main connecting rod, when the main connecting rod swing to vertical position, the outer pull force bar assembly is in vertical position, and the auxiliary connecting rod and the main connecting rod fold and gather to the coincident state, the auxiliary connecting rod lower end is located in the main connecting rod downside, the auxiliary connecting rod pushes the main connecting rod swing and forms dead angle self-locking.

[0009] According to some embodiments of the utility model, the sliding lock tooth assembly includes sliding tongue, lock tooth, limit plate and hinged ear plate, the lock tooth fixed connection in the sliding tongue top end, the sliding tongue sliding penetrates the inner slide block, the lock tooth extends the inner slide block upper end, the lock tooth can be inserted between the tooth of the tooth ring and form meshing, the limit plate upside fixed connection in the sliding tongue bottom end, the inner slide block bottom end can stop the limit plate, the hinged ear plate fixed connection in the limit plate downside, the hinged ear plate is hinged in the dead angle self-locking link mechanism lower end.

[0010] The utility model discloses a beneficial effect is: through the dead angle self -locking connecting rod mechanism self -locking sliding lock tooth subassembly meshing tooth ring's tooth when, the outer pull force application pole subassembly lower end swings to vertical state to right, and the dead angle self -locking connecting rod mechanism lower end follows traction pull rod subassembly movement swing to right, and the dead angle self -locking connecting rod mechanism forms dead angle self -locking, and sliding lock tooth subassembly pushes immovable dead angle self -locking connecting rod mechanism movement, makes sliding lock tooth subassembly end keep meshing tooth ring's tooth state, reaches the purpose of locking oval winding drum through locking tooth ring, keeps the stability of road panel state, and sliding lock tooth subassembly pushes immovable dead angle self -locking connecting rod mechanism movement, makes sliding lock tooth subassembly end keep meshing tooth ring's tooth state, makes tooth ring's tooth not with jolt push sliding lock tooth subassembly to slide to the inside slide way block, and automatically remove sliding lock tooth subassembly end meshing tooth ring tooth state.

[0011] The additional aspects and advantages of the utility model will be partly given in the following description, and some will become obvious from the following description or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to make the technical scheme of the utility model embodiment more clear, the following will briefly introduce the drawings needed to be used in the utility model embodiment, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope, and for the ordinary skilled person in the art, other related drawings can also be obtained according to these drawings without the creative labor.

[0013] Figure 1 It is the structure schematic diagram of the self -locking state of the road surface tooth ring self -locking device according to the utility model embodiment;

[0014] Figure 2 It is the structure schematic diagram of the self -locking state of the road surface tooth ring self -locking device according to the utility model embodiment;

[0015] Figure 3 It is the structure schematic diagram of the outer pull force application pole subassembly according to the utility model embodiment;

[0016] Figure 4 It is the structure schematic diagram of the traction pull rod subassembly according to the utility model embodiment;

[0017] Figure 5 It is the structure schematic diagram of the dead angle self -locking connecting rod mechanism according to the utility model embodiment;

[0018] Figure 6 It is the structure schematic diagram of the sliding lock tooth subassembly according to the utility model embodiment.

[0019] Icon: 100 - mounting seat; 200 - outer pull force applying rod assembly; 210 - hand-held rod; 220 - outer pull force applying rod; 230 - pin joint hole; 240 - fixed shaft; 250 - rotating cylinder; 300 - traction rod assembly; 310 - traction rod; 320 - first ear seat; 330 - second ear seat; 400 - dead angle self-locking linkage mechanism; 410 - base; 420 - main swing rod; 430 - main linkage rod; 440 - auxiliary linkage rod; 450 - traction linkage rod; 500 - sliding lock tooth assembly; 510 - sliding tongue; 520 - lock tooth; 530 - limiting plate; 540 - hinged ear plate; 600 - inner sliding block. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be described below with reference to the drawings in the embodiments of the utility model.

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] The road surface gear ring self-locking device according to the embodiments of the utility model will be described below with reference to the drawings.

[0023] Please refer to Figures 1 to 6 The road surface gear ring self-locking device according to the embodiments of the utility model comprises a mounting seat 100, an outer pull force applying rod assembly 200, a traction rod assembly 300, a dead angle self-locking linkage mechanism 400, a sliding lock tooth assembly 500 and an inner sliding block 600.

[0024] Please refer to Figures 1 to 2, the outer pull force bar assembly 200 is connected to the lower side of the rear end of the mounting base 100, one end of the traction pull rod assembly 300 is hinged to the outer pull force bar assembly 200, the dead angle self-locking linkage mechanism 400 is connected to the lower side of the mounting base 100, the other end of the traction pull rod assembly 300 is hinged to the lower end of the dead angle self-locking linkage mechanism 400, the lower end of the sliding lock tooth assembly 500 is hinged to the right end of the dead angle self-locking linkage mechanism 400, the dead angle self-locking linkage mechanism 400 can form a dead angle self-locking, so that the sliding lock tooth assembly 500 cannot push the dead angle self-locking linkage mechanism 400 to move, the inner sliding block 600 is fixedly connected to the right side of the mounting base 100, the upper end of the sliding lock tooth assembly 500 slides through the inside of the inner sliding block 600, and the end of the sliding lock tooth assembly 500 can be engaged with the gear teeth of the gear ring. When the sliding lock tooth assembly 500 engages the gear teeth of the gear ring through the dead angle self-locking linkage mechanism 400, the lower end of the outer pull force bar assembly 200 swings to the right to the vertical state, the lower end of the dead angle self-locking linkage mechanism 400 swings to the right with the movement of the traction pull rod assembly 300, the dead angle self-locking linkage mechanism 400 forms a dead angle self-locking, the sliding lock tooth assembly 500 cannot push the dead angle self-locking linkage mechanism 400 to move, so that the end of the sliding lock tooth assembly 500 remains in the state of engaging the gear teeth of the gear ring, and the gear ring is locked to achieve the purpose of locking the oval winding drum, and the state of the road surface plate is stable; and the sliding lock tooth assembly 500 cannot push the dead angle self-locking linkage mechanism 400 to move, so that the end of the sliding lock tooth assembly 500 remains in the state of engaging the gear teeth of the gear ring, so that the gear teeth of the gear ring cannot push the sliding lock tooth assembly 500 to slide into the inner sliding block 600 with up and down bumps, and the state of the end of the sliding lock tooth assembly 500 engaging the gear teeth of the gear ring is automatically released.

[0025] Please refer to Figures 1 to 3, the outer pulling force bar assembly 200 includes a handheld bar 210, an outer pulling force bar 220, a fixed shaft 240 and a rotating cylinder 250, the handheld bar 210 is fixedly connected to the bottom end of the outer pulling force bar 220, the outer pulling force bar 220 is provided with a pin joint hole 230, one end of the traction pull rod assembly 300 is hingedly connected to the pin joint hole 230, the fixed shaft 240 is fixedly connected to the lower side of the rear end of the mounting seat 100, the rotating cylinder 250 is rotatably sleeved on the fixed shaft 240, the outer pulling force bar 220 drives the rotating cylinder 250 to rotate around the fixed shaft 240, the upper end of the outer pulling force bar 220 is hingedly connected to the lower side of the rotating cylinder 250, and the outer pulling force bar 220 swings left and right around the lower side of the rotating cylinder 250. The handheld bar 210 drives the outer pulling force bar 220 to swing left and right around the lower side of the rotating cylinder 250, and the outer pulling force bar 220 changes the state of the dead angle self-locking linkage mechanism 400 through the traction pull rod assembly 300, thereby controlling the sliding lock tooth assembly 500 to switch between the meshing and disengaging states. In the meshing and disengaging states, the handheld bar 210 can limit the left and right swinging of the handheld bar 210 through the support plate with double clamping grooves, and the handheld bar 210 can be separated from the clamping groove through the rotation of the rotating cylinder 250 around the fixed shaft 240, so that the handheld bar 210 restores the freedom of left and right swinging, and vice versa. The handheld bar 210 is inserted into the clamping groove, and the freedom of left and right swinging of the handheld bar 210 is limited by the clamping groove.

[0026] Please refer to Figures 1 to 4 , the traction pull rod assembly 300 includes a traction pull rod 310, a first ear seat 320 and a second ear seat 330, the first ear seat 320 and the second ear seat 330 are connected to the two ends of the traction pull rod 310, the first ear seat 320 is hingedly connected to the outer pulling force bar assembly 200, and the second ear seat 330 is hingedly connected to the lower end of the dead angle self-locking linkage mechanism 400. When the outer pulling force bar 220 swings left and right, the outer pulling force bar 220 drives the first ear seat 320, the first ear seat 320 drives the second ear seat 330 through the traction pull rod 310, and the second ear seat 330 drives the lower end of the dead angle self-locking linkage mechanism 400 to swing, so that the dead angle self-locking linkage mechanism 400 switches between the self-locking and the unlocking states.

[0027] Please refer to Figures 1 to 5, the dead angle self-locking connecting rod mechanism 400 comprises a base 410, a main swing rod 420, a main connecting rod 430, an auxiliary connecting rod 440 and a traction connecting rod 450, the base 410 is fixedly connected to the lower side of the mounting seat 100, the lower side of the base 410 is provided with a mounting groove which is inclined upward from left to right, the upper end of the main swing rod 420 is hingedly connected to the upper end of the mounting groove, the lower end of the main swing rod 420 is hingedly connected to one end of the traction pull rod assembly 300, the left end of the main connecting rod 430 is hingedly connected to the lower end of the mounting groove, the lower end of the traction connecting rod 450 is hingedly connected to the right end of the main connecting rod 430, the upper end of the traction connecting rod 450 is hingedly connected to the lower end of the sliding lock gear assembly 500, the upper end of the auxiliary connecting rod 440 is hingedly connected to the main connecting rod 430, the lower end of the auxiliary connecting rod 440 is hingedly connected to the main connecting rod 430, when the main connecting rod 430 swings to the vertical position, the outer pull force rod assembly 200 is in the vertical position, and the auxiliary connecting rod 440 and the main connecting rod 430 are folded and converged to the superimposed state, the lower end of the auxiliary connecting rod 440 is located on the lower side of the main connecting rod 430, and the auxiliary connecting rod 440 cannot push the main connecting rod 430 to swing to form the dead angle self-locking. The second ear seat 330 drives the lower end of the main swing rod 420 to swing left and right, when the lower end of the main swing rod 420 swings to the right, the main swing rod 420 drives the lower end of the auxiliary connecting rod 440 to swing to the right and upward, the upper end of the auxiliary connecting rod 440 pushes the right end of the main connecting rod 430 to swing upward, the right end of the main connecting rod 430 pushes the traction connecting rod 450, and the traction connecting rod 450 pushes the sliding lock gear assembly 500 to slide upward along the inner slide block 600, so that the end part of the sliding lock gear assembly 500 is inserted into the gear teeth of the gear ring to form meshing, at the same time, when the main connecting rod 430 swings to the vertical position, the outer pull force rod assembly 200 is also in the vertical position, and the auxiliary connecting rod 440 and the main connecting rod 430 are folded and converged to the superimposed state, the auxiliary connecting rod 440 and the main connecting rod 430 form the dead angle self-locking, so that the sliding lock gear assembly 500 cannot push the main connecting rod 430 to swing through the auxiliary connecting rod 440. When the lower end of the main swing rod 420 swings to the left, the main swing rod 420 drives the lower end of the auxiliary connecting rod 440 to swing to the left and downward, the upper end of the auxiliary connecting rod 440 pulls the right end of the main connecting rod 430 to swing downward, the right end of the main connecting rod 430 pulls the traction connecting rod 450, and the traction connecting rod 450 pulls the sliding lock gear assembly 500 to slide downward along the inner slide block 600, so that the end part of the sliding lock gear assembly 500 is separated from the gear teeth of the gear ring to be out of the meshing state, and the gear ring restores the freedom degree of rotation.

[0028] Please refer to Figures 1 to 6The sliding lock tooth assembly 500 comprises a sliding tongue 510, a lock tooth 520, a limiting plate 530 and a hinged lug plate 540. The lock tooth 520 is fixedly connected to the top end of the sliding tongue 510. The sliding tongue 510 slides through the inner sliding channel block 600. The lock tooth 520 extends out of the upper end of the inner sliding channel block 600. The lock tooth 520 can be inserted between the teeth on the gear ring to form meshing. The upper side of the limiting plate 530 is fixedly connected to the bottom end of the sliding tongue 510. The bottom end of the inner sliding channel block 600 can block the limiting plate 530. The hinged lug plate 540 is fixedly connected to the lower side of the limiting plate 530. The hinged lug plate 540 is hinged to the lower end of the dead corner self-locking linkage mechanism 400. When the lower end of the main swing rod 420 swings to the right, the traction linkage 450 pushes the sliding tongue 510 through the hinged lug plate 540 to slide upward along the inner sliding channel block 600, so that the lock tooth 520 is inserted into the teeth of the gear ring to form meshing. When the lower end of the main swing rod 420 swings to the left, the traction linkage 450 pulls the sliding tongue 510 through the hinged lug plate 540 to slide downward along the inner sliding channel block 600, so that the lock tooth 520 is separated from the teeth of the gear ring to be out of meshing state, so that the gear ring restores the degree of freedom of rotation.

[0029] Specifically, the working principle of the road surface gear ring self-locking device is as follows: when the handheld rod 210 drives the outer pull force rod 220 to swing to the right around the lower side of the rotating cylinder 250, the outer pull force rod 220 pushes the first lug 320, the first lug 320 pushes the second lug 330 through the traction rod 310, the second lug 330 drives the lower end of the main swing rod 420 to swing to the right, the main swing rod 420 drives the lower end of the auxiliary linkage 440 to swing to the right and upward, the auxiliary linkage 440 pushes the right end of the main linkage 430 to swing upward, the main linkage 430 pushes the traction linkage 450, the traction linkage 450 pushes the sliding tongue 510 through the hinged lug plate 540 to slide upward along the inner sliding channel block 600, so that the lock tooth 520 is inserted into the teeth of the gear ring to form meshing, and the gear ring is locked by the lock tooth 520 to achieve the purpose of locking the elliptical winding drum, so as to keep the road surface plate stable. When the main linkage 430 swings to the vertical position, the handheld rod 210 and the outer pull force rod 220 are also in the vertical position. The auxiliary linkage 440 and the main linkage 430 are folded and overlapped to the overlapping state. The auxiliary linkage 440 and the main linkage 430 form a dead corner self-locking mechanism, so that the sliding tongue 510 cannot push the main linkage 430 to swing through the auxiliary linkage 440. The state of the lock tooth 520 locking the gear ring is kept, so that the teeth of the gear ring cannot push the lock tooth 520 with up and down bumps, thereby reducing the occurrence of the automatic unlocking of the lock tooth 520 meshing with the teeth of the gear ring.

[0030] When the handheld rod 210 drives the outer pulling force rod 220 to swing to the left around the lower side of the rotating cylinder 250, the outer pulling force rod 220 pulls the first ear seat 320, the first ear seat 320 pulls the second ear seat 330 through the traction rod 310, the second ear seat 330 pulls the lower end of the main swing rod 420 to swing to the left, the main swing rod 420 drives the lower end of the auxiliary connecting rod 440 to swing to the lower left, the upper end of the auxiliary connecting rod 440 pulls the right end of the main connecting rod 430 to swing downward, the right end of the main connecting rod 430 pulls the traction connecting rod 450, the traction connecting rod 450 pulls the sliding tongue 510 to slide downward along the inner slide block 600 through the hinged ear plate 540, and the lock tooth 520 is out of engagement with the gear teeth of the gear ring, so that the gear ring restores the freedom of rotation.

[0031] The above are only examples of the present application and are not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

Claims

1. A road surface gear ring self-locking device, characterized in that, It includes: mounting seat (100); outer pull force bar assembly (200), the outer pull force bar assembly (200) is connected to the lower side of the rear end of the mounting seat (100); towing pull rod assembly (300), one end of the towing pull rod assembly (300) is hinged to the outer pull force bar assembly (200); dead angle self-locking linkage (400), the dead angle self-locking linkage (400) is connected to the lower side of the mounting seat (100), and the other end of the towing pull rod assembly (300) is hinged to the lower end of the dead angle self-locking linkage (400); slide lock tooth assembly (500), the lower end of the slide lock tooth assembly (500) is hinged to the right end of the dead angle self-locking linkage (400), and the dead angle self-locking linkage (400) can form a dead angle self-locking, so that the slide lock tooth assembly (500) cannot move the dead angle self-locking linkage (400); inner slide block (600), the inner slide block (600) is fixedly connected to the right side of the mounting seat (100), the upper end of the slide lock tooth assembly (500) slides through the inside of the inner slide block (600), and the end of the slide lock tooth assembly (500) can be engaged with the teeth of the gear ring.

2. The road surface cog self-locking device according to claim 1, characterized in that, The outer pull force bar assembly (200) includes a hand-held rod (210), an outer pull force bar (220), a fixed shaft (240) and a rotating cylinder (250), the hand-held rod (210) is fixedly connected to the bottom end of the outer pull force bar (220), the outer pull force bar (220) is provided with a pin hole (230) on the upper end, one end of the towing pull rod assembly (300) is hinged to the pin hole (230), the fixed shaft (240) is fixedly connected to the lower side of the rear end of the mounting seat (100), the rotating cylinder (250) is rotatably sleeved on the fixed shaft (240), the outer pull force bar (220) drives the rotating cylinder (250) to rotate around the fixed shaft (240), and the upper end of the outer pull force bar (220) is hinged to the lower side of the rotating cylinder (250). The outer pull force bar (220) swings left and right around the lower side of the rotating cylinder (250).

3. The road surface cog self-locking device according to claim 1, characterized in that, The towing pull rod assembly (300) includes a towing pull rod (310), a first ear seat (320) and a second ear seat (330), the first ear seat (320) and the second ear seat (330) are connected to the two ends of the towing pull rod (310), the first ear seat (320) is hinged to the outer pull force bar assembly (200), and the second ear seat (330) is hinged to the lower end of the dead angle self-locking linkage (400).

4. The pavement cog self-locking device according to claim 1, wherein, The dead angle self-locking linkage mechanism (400) comprises a base (410), a main swing rod (420), a main linkage (430), an auxiliary linkage (440) and a traction linkage (450), the base (410) is fixedly connected to the lower side of the mounting seat (100), the lower side of the base (410) is provided with a mounting groove which is inclined upward from left to right, the upper end of the main swing rod (420) is hingedly connected to the upper end of the mounting groove, the lower end of the main swing rod (420) is hingedly connected to one end of the traction linkage assembly (300), the left end of the main linkage (430) is hingedly connected to the lower end of the mounting groove, the lower end of the traction linkage (450) is hingedly connected to the right end of the main linkage (430), the upper end of the traction linkage (450) is hingedly connected to the lower end of the sliding lock tooth assembly (500), the upper end of the auxiliary linkage (440) is hingedly connected to the main linkage (430), the lower end of the auxiliary linkage (440) is hingedly connected to the main linkage (430), when the main linkage (430) swings to the vertical position, the outer pull force linkage assembly (200) is in the vertical position, and the auxiliary linkage (440) and the main linkage (430) are folded and gathered to the coincident state, the lower end of the auxiliary linkage (440) is located on the lower side of the main linkage (430), the auxiliary linkage (440) cannot push the main linkage (430) to swing, and a dead angle self-locking is formed.

5. The pavement cog wheel self-locking device according to claim 1, wherein, The sliding lock tooth assembly (500) comprises a sliding tongue (510), a lock tooth (520), a limiting plate (530) and a hinged lug plate (540), the lock tooth (520) is fixedly connected to the top end of the sliding tongue (510), the sliding tongue (510) slides through the inner sliding block (600), the lock tooth (520) extends out of the upper end of the inner sliding block (600), the lock tooth (520) can be inserted between the teeth on the gear ring to form meshing, the upper side of the limiting plate (530) is fixedly connected to the bottom end of the sliding tongue (510), the bottom end of the inner sliding block (600) can block the limiting plate (530), and the hinged lug plate (540) is fixedly connected to the lower side of the limiting plate (530).

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