CN117021850A - Traction device - Google Patents
Traction device Download PDFInfo
- Publication number
- CN117021850A CN117021850A CN202311071622.9A CN202311071622A CN117021850A CN 117021850 A CN117021850 A CN 117021850A CN 202311071622 A CN202311071622 A CN 202311071622A CN 117021850 A CN117021850 A CN 117021850A
- Authority
- CN
- China
- Prior art keywords
- traction
- block
- limiting
- groove
- knob
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 107
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 238000004804 winding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/14—Draw-gear or towing devices characterised by their type
- B60D1/18—Tow ropes, chains or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/14—Draw-gear or towing devices characterised by their type
- B60D1/18—Tow ropes, chains or the like
- B60D1/185—Tow ropes, chains or the like comprising a cable or chain winding device
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Emergency Lowering Means (AREA)
Abstract
The invention discloses a traction device, which comprises a device base, wherein a knob is rotated in the forward direction, a limiting block in a locking limiting mechanism is driven by a transmission gear in a transmission mechanism to shrink in the rotating process by the knob, a positioning block is clamped into a positioning groove in an automatic resetting mechanism and connected with the outer side of a disc, and clamping blocks at two ends of the positioning block are inserted into clamping grooves in the inner side of the positioning groove, so that the automatic resetting mechanism is positioned in an auxiliary manner, the stability of the locking limiting mechanism is further improved, when the knob is rotated in the reverse direction, and the limiting of the automatic resetting mechanism to the automatic resetting mechanism is released, the automatic resetting mechanism drives a traction rope reel to rotate and reset by a torsion spring in the outer side of a rotating shaft, so that a worker can conveniently roll the traction rope in the traction device along with the rotation and reset of the traction rope reel when the traction device is not used, and the recovery efficiency is improved.
Description
Technical Field
The invention relates to the technical field of traction devices, in particular to a traction device.
Background
The traction device is a device used when a truck is needed, the traction hole is positioned at the front part of the truck, a cover plate of the traction hole is pried by tools such as a screwdriver, then a traction hook is inserted into the traction hole to be screwed, and when the truck is unexpected on a road, the truck is needed to drag and rescue the truck through the traction device.
According to the prior patent number CN202022285548.9 (automobile traction device and automobile), the length of the automobile traction device is adjusted by adjusting the connection position of the trailer hook part and the connection part, so that the length of the automobile traction device is variable, the automobile traction device can be adjusted according to actual conditions, and the automobile traction device can be suitable for different automobile types, so that the traction device can be shared among different automobile types, the problem that the traction device is forged integrally, the length is fixed, the automobile traction device can be used on one automobile type, but the length is possibly insufficient when the automobile traction device is used on other automobile types, and the problem that the automobile traction device cannot be used is solved.
However, after the traction device is finished, the traction rope is required to be manually stored by a worker, the time and the labor are wasted, the stability of the limiting and locking mechanism of the traction device is poor, in the traction process, the weight of the rear automobile is overweight, so that the traction rope is easy to rotate, the traction rope is lengthened, potential safety hazards are caused, and the traction rope is easy to rotate; therefore, the existing requirements are not met, and for this we propose a traction device.
Disclosure of Invention
The invention aims to provide a traction device, which solves the problems that the existing traction device provided in the background art also needs a worker to manually store a traction rope after traction is finished, time and labor are wasted, the stability of a limiting locking mechanism of the traction device is poor, and in the traction process, the traction rope is easy to rotate due to the fact that the weight of a rear automobile is too heavy, the traction rope is lengthened, potential safety hazards are caused, and the like.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a draw gear, includes the device base, the top of device base is equipped with the traction rope reel, the outside winding of traction rope reel has the traction rope, the one end of traction rope is equipped with drive mechanism, the both ends of traction rope reel all are equipped with the support frame, the both sides of traction rope reel all are equipped with automatic canceling release mechanical system, automatic canceling release mechanical system runs through the inboard that extends to the support frame, the traction rope reel passes through automatic canceling release mechanical system and support frame swing joint, one side of automatic canceling release mechanical system is located the inboard of support frame and is equipped with locking stop gear, locking stop gear's one end is equipped with drive mechanism, drive mechanism's the other end side is located the inboard of support frame and is equipped with the knob, the knob passes through drive mechanism and locking stop gear transmission connection.
Preferably, the knob is equipped with two, one of them the one end of knob is equipped with the connecting rod, the both ends of connecting rod are located the inboard of support frame and are equipped with the through-hole, the connecting rod runs through the through-hole and is connected with two knobs.
Preferably, the automatic resetting mechanism comprises a connecting disc and a rotating shaft, the automatic resetting mechanism is connected with the traction rope reel through the rotating shaft, the other end of the rotating shaft penetrates through the locking limiting mechanism to extend to the inner side of the supporting frame, the outer side of the other end of the rotating shaft is positioned on the inner wall of the supporting frame and is provided with a torsion spring, two ends of the torsion spring are respectively connected with the rotating shaft and the supporting frame, and the rotating shaft is movably connected with the supporting frame through the torsion spring.
Preferably, one end of the automatic resetting mechanism is provided with a slot at the center of the locking limiting mechanism, and a rotating shaft in the automatic resetting mechanism penetrates through the slot and extends to the inner side of the supporting frame.
Preferably, the locking stop gear is including spacing disc, stopper, displacement piece and locating piece, displacement piece and stopper structure as an organic whole, the locating piece is located the bottom of stopper, the rear end of displacement piece is located the surface of spacing disc and is equipped with the guide way, the inboard at the guide way is pegged graft to the displacement piece.
Preferably, the transmission mechanism comprises a transmission gear, tooth grooves are formed in the two sides of the transmission gear, which are respectively positioned on the outer sides of the limiting discs in the knob and the locking limiting mechanism, and the transmission gear is meshed with the knob and the locking limiting mechanism through the tooth grooves.
Preferably, a positioning groove is formed in the outer side of the connecting disc in the automatic resetting mechanism below the positioning block, the positioning block is inserted into the inner side of the positioning groove, clamping blocks are arranged at two ends of the positioning block, clamping grooves are formed in the inner side of the positioning groove at one ends of the clamping blocks, and the clamping blocks are inserted into the inner side of the clamping grooves.
Preferably, the rear end of the clamping block is provided with a spring groove at the inner side of the positioning block, the inner side of the spring groove is provided with a spring, the spring groove is fixedly connected with the spring through a bolt, the clamping block is movably connected with the positioning block through a spring, and the clamping block is inserted into the inner side of the clamping groove through the spring.
Preferably, the traction mechanism comprises a connecting block A, a traction hook and a connecting block B, wherein the rear end of the connecting block A is provided with a rope binding hook, the traction rope is bound on the rope binding hook, and the traction mechanism is connected with the traction rope through the connecting block A.
Preferably, the bottom of support frame is equipped with the connecting seat, support frame and connecting seat are integrated into one piece structure, the lower part of connecting seat is equipped with the mounting groove below the up end of device base, the connecting seat is pegged graft in the inboard of mounting groove, connecting seat passes through bolt fixed connection with the mounting groove.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the automatic reset mechanism, the knob is rotated positively, the limiting block in the locking limiting mechanism is driven by the transmission gear in the transmission mechanism to shrink in the rotating process, the limiting block in the locking limiting mechanism and the positioning block are an integral mechanism, the outer side of the connecting disc in the automatic reset mechanism is provided with the positioning groove, the positioning block is gradually clamped into the positioning groove at the outer side of the connecting disc in the automatic reset mechanism in the shrinking process of the limiting block, two ends of the positioning block are respectively provided with a clamping block, one end of each clamping block is provided with a clamping groove at the inner side of the positioning groove, and then when the positioning block is clamped into the positioning groove at the outer side of the connecting disc in the automatic reset mechanism, the clamping blocks are spliced in the clamping grooves at the inner side of the positioning grooves, so that the automatic reset mechanism is subjected to auxiliary positioning, and the stability of the locking limiting mechanism is further improved;
2. according to the invention, the traction rope reel is movably connected with the support frame through the automatic reset mechanism, and further, the knob is rotated reversely, so that when the locking limiting mechanism limits the automatic reset mechanism, the automatic reset mechanism is driven by the torsion spring outside the rotating shaft to carry out traction rope reel whirl reset, and therefore, when a worker does not use the traction device, the traction rope inside the traction device is wound along with the traction rope reel whirl reset, and the recovery efficiency is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic top view of the entire structure of the present invention;
FIG. 3 is a schematic top view of the internal structure of the support frame of the present invention;
FIG. 4 is a schematic view of the inner side structure of the support frame of the present invention;
FIG. 5 is a schematic view of a partial structure of a gear plate according to the present invention;
FIG. 6 is a schematic side view of a limiting block according to the present invention
Fig. 7 is a schematic front view of a partial structure of the stopper of the present invention.
In the figure: 1. a device base; 2. a support frame; 3. traction rope reel; 4. a traction rope; 5. a traction mechanism; 501. a connecting block A; 502. a traction hook; 503. a connecting block B; 6. a knob; 7. a connecting seat; 8. a connecting rod; 9. an automatic reset mechanism; 901. a connecting disc; 902. a rotating shaft; 903. a torsion spring; 904. a positioning groove; 10. a locking limit mechanism; 1001. a limit disc; 1002. a limiting block; 1003. a slot; 1004. a displacement block; 1005. a guide groove; 1006. a positioning block; 11. a transmission mechanism; 12. a through hole; 13. a mounting groove; 14. a clamping block; 15. a clamping groove; 16. a spring; 17. a spring groove.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1 to 7, an embodiment of the present invention provides: the utility model provides a draw gear, including device base 1, device base 1's top is equipped with traction rope reel 3, traction rope reel 3's outside winding has traction rope 4, traction rope 4's one end is equipped with traction mechanism 5, traction mechanism 5 is including connecting block A501, traction hook 502 and connecting block B503, connecting block A501's rear end is equipped with and binds the rope hook, traction rope 4 binds on binding the rope hook, traction mechanism 5 is connected with traction rope 4 through connecting block A501, traction rope reel 3's both ends all are equipped with support frame 2, support frame 2's bottom is equipped with connecting seat 7, support frame 2 and connecting seat 7 are integrated into one piece structure, the lower part of connecting seat 7 is located device base 1's up end and is equipped with mounting groove 13, connecting seat 7 is pegged graft in the inboard of mounting groove 13, connecting seat 7 and mounting groove 13 pass through bolt fixed connection, traction rope reel 3's both sides all are equipped with automatic re-setting mechanism 9, automatic re-setting mechanism 9 runs through the inboard that extends to support frame 2, traction rope reel 3 passes through automatic re-setting mechanism 9 and 2 swing joint, one side of automatic re-setting mechanism 9 is located support frame 2's inboard and is equipped with locking stop mechanism 10, locking stop mechanism is equipped with one end 11, locking stop mechanism 11 is equipped with drive knob 11, one end is equipped with drive knob 11 and is equipped with drive knob 11 through with drive knob 11.
The knob 6 is provided with two, one end of one knob 6 is provided with a connecting rod 8, two ends of the connecting rod 8 are positioned at the inner side of the supporting frame 2 and provided with through holes 12, the connecting rod 8 penetrates through the through holes 12 and is connected with the two knobs 6, the locking limiting mechanism 10 comprises a limiting disc 1001, a limiting block 1002, a displacement block 1004 and a positioning block 1006, the displacement block 1004 and the limiting block 1002 are of an integrated structure, the positioning block 1006 is positioned at the bottom end of the limiting block 1002, the rear end of the displacement block 1004 is positioned at the outer surface of the limiting disc 1001 and provided with a guide groove 1005, the displacement block 1004 is inserted at the inner side of the guide groove 1005, the transmission mechanism 11 comprises a transmission gear, two sides of the transmission gear are respectively positioned at the outer sides of the limiting disc 1001 in the knob 6 and the locking limiting mechanism 10 and are respectively provided with tooth grooves, the transmission gear is mutually meshed with the knob 6 and the locking limiting mechanism 10 through the tooth grooves, and further the knob 6 is rotated positively, the knob 6 drives a limiting block 1002 in the locking limiting mechanism 10 to shrink in the rotating process through a transmission gear in the transmission mechanism 11, a positioning groove 904 is arranged on the outer side of the connecting disc 901 in the automatic resetting mechanism 9 through the lower position of the positioning block 1006, the positioning block 1006 is inserted into the inner side of the positioning groove 904, further in the shrinking process of the limiting block 1002, the positioning block 1006 is gradually clamped into the positioning groove 904 on the outer side of the connecting disc 901 in the automatic resetting mechanism 9, clamping blocks 14 are arranged at two ends of the positioning block 1006, clamping grooves 15 are arranged on the inner side of the positioning groove 904 at one end of the clamping blocks 14, a spring groove 17 is arranged on the inner side of the clamping blocks 14, a spring 16 is arranged on the inner side of the spring groove 17 at the rear end of the clamping blocks 14, the spring groove 17 is fixedly connected with the spring 16 through bolts, the clamping blocks 14 are inserted into the inner side of the clamping grooves 15 through the springs 16, when the positioning block 1006 is clamped into the positioning groove 904 on the outer side of the connecting disc 901 in the automatic resetting mechanism 9, the clamping block 14 is inserted into the inner side of the clamping groove 15, thereby carrying out auxiliary positioning on the automatic resetting mechanism 9, further improving the stability of the locking and limiting mechanism 10,
the automatic reset mechanism 9 comprises a connecting disc 901 and a rotating shaft 902, the automatic reset mechanism 9 is connected with the traction rope reel 3 through the rotating shaft 902, the other end of the rotating shaft 902 penetrates through the locking limiting mechanism 10 to extend to the inner side of the supporting frame 2, a torsion spring 903 is arranged on the outer side of the other end of the rotating shaft 902 and positioned on the inner wall of the supporting frame 2, two ends of the torsion spring 903 are respectively connected with the rotating shaft 902 and the supporting frame 2, the rotating shaft 902 is movably connected with the supporting frame 2 through the torsion spring 903, one end of the automatic reset mechanism 9 is provided with a slot 1003 at the central position of the locking limiting mechanism 10, the rotating shaft 902 in the automatic reset mechanism 9 penetrates through the slot 1003 to extend to the inner side of the supporting frame 2, and then when limiting of the automatic reset mechanism 9 is released through a reverse rotation knob 6, the traction rope reel 3 is driven to rotate and reset through the torsion spring 903 on the outer side of the rotating shaft 902, and when a worker does not use the traction device, the traction rope inside the traction device is coiled along with the traction rope reel 3, and recovery efficiency is improved.
The traction device firstly detects whether all parts are intact, after the detection is finished, the traction device is fixed on a rescue vehicle, the traction rope reel 3 is rotated again, the traction rope 4 is discharged, the traction mechanism 5 at the front end of the traction rope 4 is connected with the traction hook at the front end of the vehicle, through the forward rotation knob 6, the knob 6 drives a limiting block 1002 in the locking limiting mechanism 10 to retract in the rotating process through a transmission gear in the transmission mechanism 11, the limiting block 1002 in the locking limiting mechanism 10 and the positioning block 1006 are integrated, a positioning groove 904 is arranged on the outer side of the connecting disc 901 in the automatic limiting mechanism 9 under the positioning block 1006, further, in the process of retracting the limiting block 1002, the positioning block 1006 is gradually clamped into a positioning groove 904 on the outer side of the connecting disc 901 in the automatic limiting mechanism 9, clamping blocks 14 are respectively arranged on two ends of the positioning block 1006, clamping blocks 14 are respectively arranged on the inner sides of the positioning groove 904, further, when the positioning block 1006 is clamped into the positioning groove 904 on the outer side of the connecting disc 901 in the automatic limiting mechanism 9, the clamping block 14 is spliced on the inner side of the clamping groove 15, thereby carrying out auxiliary positioning on the automatic limiting mechanism 9, the automatic limiting mechanism 10 is further improved, the rotating shaft 903 is connected with the other end of the rotating shaft 902 through the rotating shaft 2 through the rotating shafts 2 which is connected with the rotating shafts 2 through the rotating shafts 2, the rotating shafts 903, which extend, and the rotating shafts 2 are respectively, and the rotating shafts 2 are arranged on the opposite sides of the supporting frames 2, and are connected with the supporting frames 2, and the supporting frame 2 are respectively, when the rotating through the rotating shafts 2 are connected with the rotating shafts 2, the automatic reset mechanism 9 drives the traction rope reel 3 to rotate and reset through the torsion spring 903 at the outer side of the rotating shaft 902, so that when a worker does not use the traction device, the traction rope inside the traction device is wound along with the rotation and reset of the traction rope reel 3, and the recovery efficiency is improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a draw gear, includes device base (1), the top of device base (1) is equipped with and pulls rope reel (3), the outside winding of pulling rope reel (3) has haulage rope (4), the one end of haulage rope (4) is equipped with traction mechanism (5), its characterized in that: the utility model discloses a traction rope is characterized in that support frames (2) are arranged at two ends of a traction rope roll (3), automatic reset mechanisms (9) are arranged at two sides of the traction rope roll (3), the automatic reset mechanisms (9) penetrate through the inner sides of the support frames (2), the traction rope roll (3) is movably connected with the support frames (2) through the automatic reset mechanisms (9), one side of the automatic reset mechanisms (9) is provided with locking limiting mechanisms (10) on the inner sides of the support frames (2), one end of each locking limiting mechanism (10) is provided with a transmission mechanism (11), the other end side of each transmission mechanism (11) is provided with a knob (6) on the inner sides of the support frames (2), and the knob (6) is in transmission connection with the corresponding locking limiting mechanisms (10) through the transmission mechanism (11).
2. A traction device as claimed in claim 1, wherein: the rotary knobs (6) are provided with two rotary knobs, one rotary knob (6) is provided with a connecting rod (8), two ends of the connecting rod (8) are located on the inner side of the supporting frame (2) and are provided with through holes (12), and the connecting rod (8) penetrates through the through holes (12) to be connected with the two rotary knobs (6).
3. A traction device as claimed in claim 1, wherein: the automatic reset mechanism (9) comprises a connecting disc (901) and a rotating shaft (902), the automatic reset mechanism (9) is connected with a traction rope reel (3) through the rotating shaft (902), the other end of the rotating shaft (902) penetrates through a locking limiting mechanism (10) to extend to the inner side of a supporting frame (2), the outer side of the other end of the rotating shaft (902) is located on the inner wall of the supporting frame (2) and is provided with a torsion spring (903), two ends of the torsion spring (903) are respectively connected with the rotating shaft (902) and the supporting frame (2), and the rotating shaft (902) is movably connected with the supporting frame (2) through the torsion spring (903).
4. A traction device as claimed in claim 2, wherein: one end of the automatic resetting mechanism (9) is positioned at the center of the locking limiting mechanism (10) and is provided with a slot (1003), and a rotating shaft (902) in the automatic resetting mechanism (9) penetrates through the slot (1003) and extends to the inner side of the supporting frame (2).
5. A traction device as claimed in claim 1, wherein: the locking limiting mechanism (10) comprises a limiting disc (1001), a limiting block (1002), a displacement block (1004) and a positioning block (1006), wherein the displacement block (1004) and the limiting block (1002) are of an integrated structure, the positioning block (1006) is located at the bottom end of the limiting block (1002), a guide groove (1005) is formed in the outer surface of the limiting disc (1001) at the rear end of the displacement block (1004), and the displacement block (1004) is inserted into the inner side of the guide groove (1005).
6. A traction device as claimed in claim 5, wherein: the transmission mechanism (11) comprises a transmission gear, two sides of the transmission gear are respectively positioned at the outer sides of the limiting disc (1001) in the knob (6) and the locking limiting mechanism (10), tooth grooves are formed in the transmission gear, and the transmission gear is meshed with the knob (6) and the locking limiting mechanism (10) through the tooth grooves.
7. A traction device as claimed in claim 5, wherein: the automatic reset mechanism is characterized in that a positioning groove (904) is formed in the outer side of the connecting disc (901) in the automatic reset mechanism (9) below the positioning block (1006), the positioning block (1006) is inserted into the inner side of the positioning groove (904), clamping blocks (14) are arranged at two ends of the positioning block (1006), clamping grooves (15) are formed in the inner side of the positioning groove (904) at one end of each clamping block (14), and the clamping blocks (14) are inserted into the inner side of the corresponding clamping grooves (15).
8. A traction device as claimed in claim 7, wherein: the rear end of the clamping block (14) is provided with a spring groove (17) at the inner side of the positioning block (1006), a spring (16) is arranged at the inner side of the spring groove (17), the spring groove (17) and the spring (16) are fixedly connected through bolts, the clamping block (14) is movably connected with the positioning block (1006) through the spring (16), and the clamping block (14) is inserted into the inner side of the clamping groove (15) through the spring (16).
9. A traction device as claimed in claim 1, wherein: the traction mechanism (5) comprises a connecting block A (501), a traction hook (502) and a connecting block B (503), wherein a rope binding hook is arranged at the rear end of the connecting block A (501), the traction rope (4) is bound on the rope binding hook, and the traction mechanism (5) is connected with the traction rope (4) through the connecting block A (501).
10. A traction device as claimed in claim 1, wherein: the bottom of support frame (2) is equipped with connecting seat (7), support frame (2) and connecting seat (7) are integrated into one piece structure, the lower extreme of connecting seat (7) is equipped with mounting groove (13) below device base (1), connecting seat (7) are pegged graft in the inboard of mounting groove (13), connecting seat (7) and mounting groove (13) pass through bolt fixed connection.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202311071622.9A CN117021850A (en) | 2023-08-24 | 2023-08-24 | Traction device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202311071622.9A CN117021850A (en) | 2023-08-24 | 2023-08-24 | Traction device |
Publications (1)
Publication Number | Publication Date |
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CN117021850A true CN117021850A (en) | 2023-11-10 |
Family
ID=88635283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202311071622.9A Withdrawn CN117021850A (en) | 2023-08-24 | 2023-08-24 | Traction device |
Country Status (1)
Country | Link |
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CN (1) | CN117021850A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117445596A (en) * | 2023-12-25 | 2024-01-26 | 莆田莆永高速公路有限责任公司 | Expressway portal with maintenance safety function |
-
2023
- 2023-08-24 CN CN202311071622.9A patent/CN117021850A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117445596A (en) * | 2023-12-25 | 2024-01-26 | 莆田莆永高速公路有限责任公司 | Expressway portal with maintenance safety function |
CN117445596B (en) * | 2023-12-25 | 2024-03-05 | 莆田莆永高速公路有限责任公司 | Expressway portal with maintenance safety function |
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Application publication date: 20231110 |