Passenger bridge system with bilateral synchronous detection

Abstract

The passenger bridge system comprises a channel device, a walking device, two lifting devices, two detection sensors and a control device, each lifting device comprises a stand column and a guide pipe, one end of each stand column is connected with the corresponding guide pipe in a sleeved mode, the other end of each stand column is fixedly connected to the walking device, the channel device is connected with the guide pipes, and the detection sensors are connected with the control device. The stand column is provided with a lead screw transmission base, and the motor is used for driving the lead screw to rotate so as to drive the guide pipe to ascend and descend along the stand column. The two detection sensors are used for detecting the angular displacement of the lead screw and / or the motor shaft of the motor and sending a detection signal; the control device is used for adjusting the number of turns of rotation of the lead screw driven by the two motors according to detection signals of the two detection sensors. The passenger bridge system with the double-side synchronous detection function can accurately feed back the lifting height of the supports on the two sides of the passenger channel in real time, the running state of the motor can be conveniently adjusted in time, and the synchronous lifting precision of the supports on the two sides is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of passenger boarding bridges, in particular to a passenger boarding bridge system with bilateral synchronous detection. Background Art

[0002] The lifting mechanism of a passenger boarding bridge usually adopts a double-support structure independently driven by two motors respectively to realize the lifting and support of the passenger passage. The lifting mechanism is located on the traveling mechanism of the passenger boarding bridge. There are two vertical columns on its cross beam, and a conduit is sleeved outside the columns. The two conduits are integrally connected with the passenger passage. Power driving mechanisms are respectively and independently installed at the top ends of the two conduits to drive the conduits to move. Generally, they are three-phase asynchronous AC motors. Although the two motors are the same, factors such as tolerances in the manufacturing process, slight differences in parts, and the sliding friction loads on both sides caused by the manufacturing errors of the columns and conduits may all lead to a certain degree of inconsistency in the rotational speeds output by the two motors on both sides. Although this difference is usually relatively small, after the two motors operate for a period of time, the error accumulation between the two may reach a certain level and may damage the entire lifting mechanism.

[0003] The existing method such as Figure 1 shown in the figure, which monitors the conduits by setting limit switches 101 and trigger blocks 102 to control the motors to ensure the synchronization of the two conduits. A calibration trigger block is set at an appropriate height corresponding to the common moving range of the conduits on the columns. In theory, when the two conduits on both sides are synchronized, the limit switches on both sides will be triggered synchronously. If the unilateral calibration limit switch is triggered, it indicates that the two sides are in an asynchronous state and need to be synchronized. However, since the columns and conduits are welded parts, the straightness and dimensional accuracy are not high, and the measurement deviation value is quite rough, so the actual effect is not good. Moreover, the limit switches sometimes also show a slow response, resulting in the inability to accurately detect the asynchronous situation of the two conduits on both sides.

[0004] When using the method of mechanical forced synchronization such as Figure 2 shown in the figure, some synchronization devices need to be added to the mechanical structure, such as a forced synchronization shaft 201, a coupling, etc., to parallelly connect two independent drive units and force the synchronous movement of the two mechanisms. However, this increases the complexity and maintenance difficulty of the system and the cost of the passenger boarding bridge. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a passenger boarding bridge system with bilateral synchronous detection, which can accurately and real-time feedback the lifting heights of the supports on both sides of the passenger passage, facilitate timely adjustment of the operating state of the motors, ensure the synchronization accuracy of the supports on both sides during lifting, and effectively improve the synchronization reliability of the double-support lifting device of the passenger boarding bridge system.

[0006] To achieve the above purpose, the utility model discloses a passenger boarding bridge system with bilateral synchronous detection, which comprises:

[0007] A channel device, a traveling device, and two lifting devices. Both of the two lifting devices include a column and a conduit. One end of the column is slidably sleeved with the conduit, and the other end is fixedly connected to the traveling device. Both side surfaces of the channel device are fixedly connected to the two conduits respectively. The conduit is provided with a motor and a lead screw. The column is provided with a lead screw transmission seat. The lead screw is respectively connected to the motor and the lead screw transmission seat. The motor is used to drive the lead screw to rotate so as to drive the conduit to move up and down along the column;

[0008] Two detection sensors are respectively arranged on the two lifting devices. The detection sensors are used to detect the angular displacement of the lead screw and / or the motor shaft of the motor, and send detection signals;

[0009] A control device is respectively connected to the two detection sensors and the two motors. The control device is used to adjust the number of turns of the two motors driving the lead screw to rotate according to the detection signals of the two detection sensors.

[0010] Optionally, the detection sensor includes a support, an encoder, a connecting plate, and an encoder input shaft. The motor is provided with a primary brake and a motor shaft. The encoder input shaft includes a sleeve opening and a shaft body. The encoder input shaft is fixedly connected to the end of the motor shaft through the sleeve opening. The encoder is provided with a shaft sleeve hole, and the shaft body is inserted into the shaft sleeve hole. The support is fixedly connected to the primary brake, and the supporting end of the encoder is fixedly connected to the support through the connecting plate.

[0011] Optionally, the encoder is an absolute encoder.

[0012] Optionally, the detection sensor includes a first proximity sensor and an induction gear disk. The induction gear disk is provided with a plurality of gear portions along its circumference. The induction gear disk is coaxially connected to the end of the lead screw. The sensing end of the first proximity sensor is arranged corresponding to the gear portion. The first proximity sensor is used to detect the gear portion and trigger the generation of a first pulse signal.

[0013] Optionally, the detection sensor further includes a second proximity sensor. The second proximity sensor is arranged at an interval from the first proximity sensor along the circumference of the induction gear disk. The second proximity sensor is used to detect the gear portion and trigger the generation of a second pulse signal.

[0014] Optionally, the motor is provided with a primary brake and a motor shaft. The primary brake is provided with a first brake hole. The lifting device is provided with a direct coupling body and a secondary brake. The secondary brake is provided with a second brake hole. One end of the direct coupling body is provided with a blind hole, and the other end passes through the second brake hole. The motor shaft includes an inner end and an outer end. The inner end passes through the first brake hole, and the outer end extends out of the motor and is inserted into the blind hole. The primary brake is used to brake the motor shaft, and the secondary brake is used to brake the motor shaft through the direct coupling body.

[0015] Optionally, the lifting device is provided with a speed reducer and a coupling. Both ends of the speed reducer are respectively provided with a bearing sleeve and an output shaft. One end of the direct coupling body passing through the second brake hole is inserted into the bearing sleeve, and the output shaft is fixedly connected to the end of the lead screw through the coupling.

[0016] Optionally, the lifting device is provided with a brake housing and a direct connection flange. The secondary brake is installed in the brake housing. The two sides of the direct connection flange are respectively provided with an upper stop and a lower stop. The upper stop is engaged and clamped with the brake housing, and the lower stop is engaged and clamped with the end face of the bearing sleeve provided on the speed reducer.

[0017] Optionally, the speed reducer is a cycloidal pinwheel speed reducer or a planetary speed reducer.

[0018] Optionally, the coupling is a chain coupling or a plum blossom elastic coupling.

[0019] In the present utility model, detection sensors are provided to detect the lifting conditions of the two lifting devices in real time. Both lifting devices include columns and conduits slidably sleeved on the columns. The columns are fixedly connected to the traveling device. The two side faces of the passage device are respectively fixedly connected to the two conduits. The conduits are provided with motors and lead screws connected to the lead screw transmission seats of the columns. The lead screws rotate under the drive of the motors to drive the conduits to move up and down along the columns. The two detection sensors respectively detect the angular displacements of the lead screws and / or the motor shafts of the motors in real time. The control device adjusts the number of turns of the two motors driving the lead screws to rotate in a timely manner according to the detection signals of the two detection sensors. The above detection sensors accurately feedback the lifting heights of the supports on both sides of the passenger passage in real time, cooperate with the control device to adjust the operating state of the motors in a timely manner, ensure the accuracy of the synchronous lifting of the supports on both sides, and effectively improve the synchronous reliability of the double-support lifting device of the passenger boarding bridge system. Description of the Drawings

[0020] Figure 1 It is a cross-sectional view of a limit switch and a trigger block in a passenger boarding bridge system of an existing embodiment.

[0021] Figure 2Cross-sectional view of the drive unit and synchronization device in the existing passenger boarding bridge system of the embodiment.

[0022] Figure 3 Cross-sectional view of the passenger boarding bridge system with bilateral synchronization detection according to the embodiment of the present invention.

[0023] Figure 4 Cross-sectional view of the power assembly in the first embodiment of the passenger boarding bridge system with bilateral synchronization detection according to the present invention.

[0024] Figure 5 Cross-sectional view of the power assembly in the second embodiment of the passenger boarding bridge system with bilateral synchronization detection according to the present invention.

[0025] Figure 6 Cross-sectional view of the detection sensor in the second embodiment of the passenger boarding bridge system with bilateral synchronization detection according to the present invention. Detailed implementation manners

[0026] In order to illustrate in detail the technical content, structural features, achieved purposes and effects of the present invention, the following will be described in detail in conjunction with the embodiments and with reference to the accompanying drawings.

[0027] Please refer to Figures 3 to 6 , the present invention discloses a passenger boarding bridge system with bilateral synchronization detection, which includes:

[0028] A passage device 1, a traveling device 2 and two lifting devices 3. The two lifting devices 3 both include a column 31 and a conduit 32. One end of the column 31 is slidably sleeved with the conduit 32, and the other end is fixedly connected to the traveling device 2. The two side surfaces of the passage device 1 are respectively fixedly connected to the two conduits 32. The conduit 32 is provided with a motor 33 and a lead screw 341, and the column 31 is provided with a lead screw transmission seat 342. The lead screw 341 is respectively connected to the motor 33 and the lead screw transmission seat 342. The motor 33 is used to drive the lead screw 341 to rotate to drive the conduit 32 to move up and down along the column 31;

[0029] Two detection sensors 4. The two detection sensors 4 are respectively arranged on the two lifting devices 3. The detection sensor 4 is used to detect the angular displacement of the lead screw 341 and / or the motor shaft 331 of the motor 33, and send a detection signal;

[0030] A control device. The control device is respectively connected to the two detection sensors 4 and the two motors 33. The control device is used to adjust the number of turns of the two motors 33 driving the lead screw 341 to rotate according to the detection signals of the two detection sensors 4.

[0031] The utility model detects the lifting and lowering of two lifting devices 3 in real time by setting a detection sensor 4. Both lifting devices 3 include a column 31 and a guide tube 32 slidably sleeved on the column 31. The column 31 is fixedly connected to the walking device 2. The two sides of the passage device 1 are respectively fixedly connected to the two guide tubes 32. The guide tube 32 is provided with a motor 33 and a screw rod 341 connected to the screw rod transmission seat 342 of the column 31. The screw rod 341 rotates under the drive of the motor 33 to drive the guide tube 32 to move up and down along the column 31. The two detection sensors 4 respectively detect the angular displacement of the screw rod 341 and / or the motor shaft 331 of the motor 33 in real time. The control device timely adjusts the number of rotations of the two motors 33 driving the screw rod 341 according to the detection signals of the two detection sensors 4. The above detection sensors 4 accurately feedback the lifting height of the supports on both sides of the passenger channel 11 in real time, cooperate with the control device to timely adjust the operating state of the motor 33, ensure the precision of the synchronous lifting of the supports on both sides, and effectively improve the synchronization reliability of the double-support lifting device of the passenger bridge system.

[0032] See also Figures 3 to 4 The detection sensor 4 includes a support 41, an encoder 42, a connecting plate 43 and an encoder input shaft 44. The motor 33 is provided with a primary brake 332 and a motor shaft 331. The encoder input shaft 44 includes a sleeve 441 and a shaft body 442. The encoder input shaft 44 is fixedly connected to the end of the motor shaft 331 through the sleeve 441. The encoder 42 is provided with a shaft sleeve hole 421. The shaft body 442 is inserted into the shaft sleeve hole 421. The support 41 is fixedly connected to the primary brake 332. The supporting end of the encoder 42 is fixedly connected to the support 41 through the connecting plate 43, which is conducive to ensuring that the encoder 42 is coaxial with the motor 33, improving the accuracy of the encoder 42 and making the overall structure compact.

[0033] Specifically, in the first embodiment ( Figure 4 ), the encoder 42 is a hollow shaft encoder, and the sleeve 441 of the encoder input shaft 44 is connected to the end of the motor shaft 331 in the form of a shrink fit or a transition fit and fixed by screws to ensure the concentricity of the installation of the two, while the shaft body 442 of the encoder input shaft 44 is locked by the screws provided by the encoder 42 to save installation space.

[0034] Optionally, the encoder 42 is an absolute encoder.

[0035] The synchronization, reliability and safety of the lifting device 3 can be improved through real-time monitoring, and accidents caused by synchronization problems can be effectively prevented.

[0036] Specifically, in the first embodiment ( Figure 4) In it, the encoder 42 adopts an absolute encoder of a multi-turn range mechanical gearbox type, which can uniquely encode each position of the rotation of the motor shaft 331, effectively avoiding the problems of interference and error accumulation. After aligning the initialization zero points of the encoders 42 of the two motors 33 through debugging, their absolute coordinates will not change. Therefore, the two motors 33 can be monitored effectively in the long term through the absolute coordinates, and the synchronous control of the two motors 33 can be achieved by setting virtual axes and synchronous following methods.

[0037] Refer to Figures 3 to 6 , the detection sensor 4 includes a first proximity sensor 45 and an induction gear disk 46. A plurality of gear portions 461 are arranged along the circumferential direction of the induction gear disk 46. The induction gear disk 46 is coaxially connected to the end of the lead screw 341. The induction end of the first proximity sensor 45 is arranged corresponding to the gear portion 461. The first proximity sensor 45 is used to detect the gear portion 461 and trigger and generate a first pulse signal.

[0038] Specifically, in the second embodiment ( Figure 5 and Figure 6 ), the induction gear disk 46 rotates driven by the lead screw 341. When the gear portion 461 rotates close to the first proximity sensor 45, it will generate a pulse signal. The control device is the PLC controller of the passenger boarding bridge control system, which is responsible for receiving the first pulse signals on the two lifting devices 3, calculating the rotation speed of the lead screw 341 by measuring the frequency of the first pulse signals, and converting it into the lifting height of the conduit 32 through the lead of the lead screw 341.

[0039] Specifically, in the second embodiment ( Figure 5 and Figure 6 ), the control device will respectively record the time and sequence of the appearance of two groups of first pulse signals generated when the two motors 33 drive the two lead screws 341, and monitor and analyze these two groups of first pulse signals in real time. Through the logical judgment of the control program, the real-time lifting height difference between the two conduits 32 is obtained. When the height difference exceeds the set allowable value, the control device will achieve automatic compensation by adjusting the number of turns of the motor 33 driving the lead screw 341 to eliminate the height difference between the two sides of the conduit 32 and maintain the lifting synchronization on both sides, but not limited to this.

[0040] Refer to Figures 3 to 6 , the detection sensor 4 further includes a second proximity sensor 47. The second proximity sensor 47 is arranged at intervals with the first proximity sensor 45 along the circumferential direction of the induction gear disk 46. The second proximity sensor 47 is used to detect the gear portion 461 and trigger and generate a second pulse signal.

[0041] Specifically, in the second embodiment ( Figure 5 and Figure 6)In [description], the first proximity sensor 45 and the second proximity sensor 47 are spaced at an angular range of 90 degrees to 180 degrees, such that there is a specific relative positional relationship in time between the first pulse signal and the second pulse signal, so that the control device can judge the rotation direction of the motor shaft 331 through the second pulse signal, and thereby judge the lifting direction of the conduit 32 along the column 31, but not limited thereto.

[0042] Refer to Figures 3 to 6 , the motor 33 is provided with a primary brake 332 and a motor shaft 331. The primary brake 332 is provided with a first brake hole 3321. The lifting device 3 is provided with a direct coupling body 35 and a secondary brake 36. The secondary brake 36 is provided with a second brake hole 361. One end of the direct coupling body 35 is provided with a blind hole 351, and the other end passes through the second brake hole 361. The motor shaft 331 includes an inner end 3311 and an outer end 3312. The inner end 3311 passes through the first brake hole 3321, and the outer end 3312 extends out of the motor 33 and is inserted into the blind hole 351. The primary brake 332 is used to brake the motor shaft 331, and the secondary brake 36 is used to brake the motor shaft 331 through the direct coupling body 35.

[0043] In the case of sudden single-arm support or emergency lowering of the bridge, the two-stage braking can quickly brake, so that the lifting device 3 can obtain double safety guarantees, prevent the passenger bridge from getting out of control, and the redundant protection can greatly improve the safety of the system and effectively avoid the occurrence of accidents; and in cooperation with the control device, it can achieve precise control of the lifting position of the conduit 32 and meet the synchronism requirements.

[0044] Specifically, in this embodiment, the secondary brake 36 is larger in specification and stronger in braking torque than the primary brake 332 provided inside the motor 33, and by virtue of the characteristic of the reducer to reduce speed and increase torque, its braking torque is amplified, so that it has a sufficiently strong braking force and a high safety factor, avoiding faults such as slipping and brake failure.

[0045] Specifically, in this embodiment, the primary brake 332 provided at the tail end of the motor 33 is used for braking during the normal lifting and lowering of the conduit 32. When an emergency occurs and the safety boot of the passenger bridge is triggered, the primary brake 332 and the secondary brake 36 perform emergency braking simultaneously, and the passenger bridge can be quickly braked and safely stopped within one second, making the braking more stable, reliable and safe.

[0046] Refer to Figures 3 to 6 , the lifting device 3 is provided with a reducer 37 and a coupling 38. The two ends of the reducer 37 are respectively provided with a bearing sleeve 371 and an output shaft 372. One end of the direct coupling body 35 passing through the second brake hole 361 is inserted into the bearing sleeve 371, and the output shaft 372 is fixedly connected to the end of the lead screw 341 through the coupling 38.

[0047] Specifically, in this embodiment, one end of the direct coupling body 35 provided with a blind hole 351 is connected to the outer end 3312 of the motor shaft 331, and the other end passes through the second brake hole 361 and is inserted into the spline sleeve of the brake disc of the secondary brake 36, and directly inserted into the bearing sleeve 371 of the cycloidal component 373 of the speed reducer 37. The bearing sleeve 371 is an eccentric roller bearing sleeve. In this way, the power of the motor 33 is transmitted through the direct coupling body 35, the eccentric roller bearing sleeve 371, and the cycloidal component 373 to smoothly convert its rotational motion into the low-speed and high-torque motion of the output shaft 372 of the speed reducer 37, which is beneficial to reducing the volume of the power assembly 30 and optimizing the space layout.

[0048] Specifically, in this embodiment, the power assembly 30 adopts a direct-connected brake motor 33 with a compact structure and high efficiency. It is directly connected to the secondary brake 36, and the secondary brake 36 is also connected to the speed reducer 37 in a direct-connected form, enabling the power assembly 30 to have a high structural integration degree while reducing vibration and noise, and improving the stability and reliability of the system.

[0049] It can be understood that since the encoder 42, the primary brake 332, the motor 33, the secondary brake 36, and the speed reducer 37 are integrated into a direct-connected power assembly 30 by a direct-connected coaxial structure, reducing additional intermediate connection components and simplifying the overall system structure, the power assembly 30 has a more compact structure and also reduces the device cost.

[0050] Refer to Figures 3 to 6 , the lifting device 3 is provided with a brake housing 362 and a direct connection flange 39. The secondary brake 36 is installed in the brake housing 362. The upper stop 391 and the lower stop 392 are respectively provided on both sides of the direct connection flange 39. The upper stop 391 is engaged and clamped with the brake housing 362, and the lower stop 392 is engaged and clamped with the end face of the speed reducer 37 provided with the bearing sleeve 371, which is beneficial to ensuring the coaxiality requirement of the power assembly 30, simplifying the intermediate connection structure, and making the structure of the power assembly 30 more compact.

[0051] Specifically, in this embodiment, the secondary brake 36 is arranged between the speed reducer 37 and the motor 33. The brake housing 362 completely wraps the secondary brake 36, effectively improving its waterproof and dustproof performance, and it is clamped and tightly fitted with the motor 33 through the provided flange stop, but it is not limited to this.

[0052] Optionally, the speed reducer 37 is a cycloid pinwheel speed reducer or a planetary speed reducer.

[0053] Specifically, in this embodiment, the speed reducer 37 used is a cycloid pinwheel speed reducer with a compact structure, small volume, light weight, high efficiency, and strong bearing capacity, but it is not limited to this.

[0054] Optionally, the coupling 38 is a chain coupling or a diaphragm coupling.

[0055] Specifically, by transmitting the low-speed and high-torque output of the directly-connected motor 33 to the ball screw drive assembly 340, the lifting and lowering of the conduit 32 relative to the column 31 is driven, thereby realizing the lifting and lowering of the passenger passage 11. In this embodiment, the passage device 1 includes a passenger passage 11 and a passage frame 12 sleeved outside the passenger passage 11. The upper and lower sides of both sides of the passage frame 12 are fixedly connected to the two conduits 32 respectively. The lifting device 3 uses a steel column 31, a conduit 32 and a slider. The screw drive seat 342 and the screw 341 adopt a ball screw drive assembly 340, whose precision is not high. The axis of the ball screw drive assembly 340 cannot meet the requirement of being coaxially arranged with the directly-connected motor 33, and there will be a certain axis offset and angular error between the two. Therefore, a chain coupling or a diaphragm coupling is used, and an intermediate link with a certain compensation ability is used to connect the two by transition, but it is not limited to this.

[0056] The above-disclosed are only the preferred embodiments of the present invention, and of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A passenger bridge system with dual-side synchronous detection, characterized in that: include: A channel device, a walking device and two lifting devices, each of the two lifting devices comprises a column and a guide tube, one end of the column is slidably sleeved with the guide tube, and the other end is fixedly connected to the walking device, the two side surfaces of the channel device are respectively fixedly connected to the two guide tubes, the guide tubes are provided with a motor and a screw rod, the column is provided with a screw rod transmission seat, the screw rod is respectively connected to the motor and the screw rod transmission seat, the motor is used to drive the screw rod to rotate so as to drive the guide tube to move up and down along the column; Two detection sensors, the two detection sensors are respectively arranged on the two lifting devices, and the detection sensors are used to detect the angular displacement of the screw rod and / or the motor shaft of the motor and send a detection signal; A control device is connected to the two detection sensors and the two motors respectively, and is used to adjust the number of turns of the two motors driving the screw rod to rotate according to the detection signals of the two detection sensors.

2. The passenger bridge system with dual-side synchronous detection according to claim 1, characterized in that: The detection sensor includes a support, an encoder, a connecting plate and an encoder input shaft. The motor is provided with a primary brake and a motor shaft. The encoder input shaft includes a sleeve and a shaft body. The encoder input shaft is fixedly connected to the end of the motor shaft through the sleeve. The encoder is provided with a shaft sleeve hole. The shaft body is inserted into the shaft sleeve hole. The support is fixedly connected to the primary brake. The supporting end of the encoder is fixedly connected to the support through the connecting plate.

3. The passenger bridge system with dual-side synchronous detection according to claim 2, characterized in that: The encoder is an absolute value encoder.

4. The passenger bridge system with dual-side synchronous detection according to claim 1, characterized in that: The detection sensor includes a first proximity sensor and a sensing toothed disc, wherein the sensing toothed disc is provided with a plurality of gear parts along its circumference, the sensing toothed disc is coaxially connected to the end of the screw rod, the sensing end of the first proximity sensor is provided corresponding to the gear part, and the first proximity sensor is used to detect the gear part and trigger the generation of a first pulse signal.

5. The passenger bridge system with dual-side synchronous detection according to claim 4, characterized in that: The detection sensor further includes a second proximity sensor, which is arranged along the circumference of the sensing toothed disc and spaced apart from the first proximity sensor, and the second proximity sensor is used to detect the gear portion and trigger the generation of a second pulse signal.

6. The passenger bridge system with dual-side synchronous detection according to claim 1, characterized in that: The motor is provided with a primary brake and a motor shaft, the primary brake is provided with a first brake hole, the lifting device is provided with a direct-connected shaft body and a secondary brake, the secondary brake is provided with a second brake hole, one end of the direct-connected shaft body is provided with a blind hole, and the other end is passed through the second brake hole, the motor shaft includes an inner end and an outer end, the inner end is passed through the first brake hole, the outer end extends out of the motor and is plugged into the blind hole, the primary brake is used to brake the motor shaft, and the secondary brake is used to brake the motor shaft through the direct-connected shaft body.

7. The passenger bridge system with dual-side synchronous detection according to claim 6, characterized in that: The lifting device is provided with a reducer and a coupling, and the two ends of the reducer are respectively provided with a bearing sleeve and an output shaft, one end of the straight-coupled shaft body passing through the second brake hole is inserted into the bearing sleeve, and the output shaft is fixedly connected to the end of the screw rod through the coupling.

8. The passenger bridge system with dual-side synchronous detection according to claim 7, characterized in that: The lifting device is provided with a brake housing and a direct-connection flange, the secondary brake is installed in the brake housing, and upper and lower stoppers are respectively provided on both sides of the direct-connection flange. The upper stopper is engaged with the brake housing, and the lower stopper is engaged with the end face of the reducer provided with a bearing sleeve.

9. The passenger bridge system with dual-side synchronous detection according to claim 7, characterized in that: The reducer is a cycloid pinwheel reducer or a planetary reducer.

10. The passenger bridge system with dual-side synchronous detection according to claim 7, characterized in that: The coupling is a chain coupling or a plum blossom-shaped elastic coupling.

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