Rod descending mechanism for automatic lifting current collector of trolley bus

Abstract

The utility model relates to a rod descending mechanism of an automatic lifting current collector of a trolley bus. The rod descending mechanism is mainly composed of a base, a rotating seat, a pitching arm, a large tension spring, a trolley rod and a current collecting head. One end of the pitching arm is hinged to the rotating seat, the trolley pole is fixed to the other end of the pitching arm, and the current collecting head is installed at the tail end of the trolley pole. The two ends of the large tension spring are hinged to the rotating base and the pitching arm respectively. The mechanism is further provided with a brake to control rotation of the rotating seat and an electric rope winder, and the electric rope winder is connected with the trolley pole through an internal pull rope, so that lifting control over the trolley pole is achieved. The control module is responsible for monitoring the electric connection state of the current collector and operating the brake and the electric rope winder according to the electric connection state so as to quickly respond to and process the rod descending requirement. According to the design, a traditional descending rod and an aligning air cylinder are abandoned, the overall height of equipment is reduced, the available space in a compartment is increased, the structure is simplified, the reaction speed is increased, and the running safety of the trolley bus is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a trolley bus field, concretely relates to a trolley bus automatic lifting current collector's drop pole mechanism. BACKGROUND

[0002] The trolley bus is by installing on the top of the vehicle current collector contact positive and negative two slide contact line transmission electric energy to the vehicle as the power source of the vehicle, generally includes the current collector pole, the current collector head and the pitch arm, the current collector head sets up on the current collector pole, the current collector pole sets up in the end of the pitch arm, the proximal end of the pitch arm is hinged and is installed on the roof, through the pitch of the current collector pole realizes the lifting of the current collector pole, when working, the pitch arm is up, makes the current collector pole resist the slide contact line and realizes the electric conduction, when the vehicle is off work or has other special circumstances, the pitch arm is down, realizes the storage of the current collector pole.

[0003] Because the trolley bus is high voltage, therefore the traditional control current collector's all kinds of action mechanism cannot use flammable hydraulic oil, and can only use the pneumatic cylinder, and the gas has compressibility, leads to the response speed of each action not enough fast, precision not enough high.

[0004] Further, in practical application, because the road condition is complex, requires the trolley bus to still be able to normally operate under the condition of deviating from the slide contact line certain angle, so the current collector also needs to have the function of horizontal rotation, namely the proximal end of the pitch arm should be hinged on a rotating body, the rotating body can rotate horizontally relative to the vehicle body, but this rotating body itself should be centered before lifting, so as to realize when the vehicle is parked in a certain range, the pitch arm is just lifted to make the current collector head be clamped into the slide contact line, so generally still need to set up the return cylinder, the return cylinder is hingedly connected to the support fixed on the roof and the rotating body respectively, the return cylinder acts, controls the rotation angle of the rotating body, makes it restore to the centered position.

[0005] The lifting of the current collector pole (namely the pitch action of the pitch arm) is realized by the cooperation of the lowering cylinder and the large tension spring, one end of the lowering cylinder and the large tension spring is respectively hingedly installed on the rotating body, the other end is connected to the pitch arm, both jointly control the up-and-down swing of the current collector pole in the vertical plane, the elasticity of the large tension spring maintains the state of the lifting of the current collector pole, makes the current collector head of the distal end of the current collector pole contact the slide contact line and keep the pressure, forms the electric conduction, commonly known as the net.

[0006] When lowering the pole, the lowering cylinder is pressurized and extends, presses down the pitch arm and the current collector pole, overcomes the upward tension of the large tension spring, completes the lowering action;

[0007] When lifting the pole, the lowering cylinder is de-pressurized, the tension of the large tension spring drives the pitch arm and the current collector pole to complete the lifting action.

[0008] When turning or overtaking, the slide wire is located on one side of the vehicle, which is a case of off-line driving. If the vehicle is off-line too seriously, the current collector pole may be off the network, and the pitch arm after off the network will be quickly raised under the action of the large spring. In addition, the vehicle is often in a running state at this time, and the inertial rotation of the rotating body, so the pitch arm after off the network often hits the overhead line, causing failure. Therefore, the technical personnel in the art have been seeking a current collector which can quickly lower the pole and avoid breaking the overhead line when off the network.

[0009] At the same time, since all the above structural members are installed on the roof, and the volume of each component is relatively large, the space above the roof is occupied. Based on safety considerations, the distance between the roof and the slide wire cannot be less than a specified value, that is, without modifying the power grid, the highest point of the roof member is limited, and in the case of a large member height, the space in the carriage is inevitably squeezed. Content of the utility model

[0010] The technical problem to be solved by the utility model is how to avoid sudden and large upward movement of the current collector to cause failure when the current collector is off the network.

[0011] The specific technical scheme for solving the above technical problem is:

[0012] A pole-lowering mechanism of an automatic lifting current collector of a trolleybus, comprising a base, a rotating seat, a pitch arm, and a large spring, wherein the rotating seat is arranged to be able to pivot on the base, the pitch arm comprises a mounting end and a working end, the mounting end of the pitch arm is hingedly mounted on the rotating seat, one end of the large spring is hingedly mounted on the rotating seat, and the other end of the large spring is hingedly mounted on the pitch arm, the working end of the pitch arm is fixed to one end of a current collector pole, the other end of the current collector pole is the working end, and the working end of the current collector pole is fixed to a current collector head, wherein the rotating seat, the pitch arm, the current collector pole, and the current collector head are arranged on the same vertical plane, the current collector head is used to contact the slide wire to enable electrical conduction between the power grid and the vehicle, and they are all mounted on the roof.

[0013] Further comprising a brake for controlling the rotating action of the rotating seat.

[0014] Further comprising an electric rope reel, wherein the electric rope reel is fixed to the tail of the vehicle, the electric rope reel is provided with a pull rope, and the free end of the pull rope is fixed to a position close to the working end of the current collector pole.

[0015] Further comprising a control module for monitoring the electrical connection state of the current collector in real time and controlling the actions of the brake and the electric rope reel.

[0016] The control module detects the electrical connection state of the current collecting pole, controls the cooperation of the electric rope winding device and the brake, and the damping force generated by the brake is smaller than the horizontal component of the pulling rope when the pole is lowered.

[0017] The pole lowering step of the pole lowering mechanism is as follows:

[0018] S1, the control module receives a pole lowering signal of an emergency pole lowering triggered by a human control or a system;

[0019] S2, the control module controls the brake and the electric rope winding device to be started immediately, the brake generates a braking force, and the electric rope winding device continuously winds the pulling rope quickly, drives the current collecting pole, the luffing arm and the rotating seat to rotate towards the electric rope winding device, and synchronously drives the current collecting pole and the luffing arm to lower, the control module controls the rotating force to be greater than the force of the brake to prevent the rotating seat from rotating, and the two together make the current collecting head move towards the rope winding device under control.

[0020] S3, the current collecting head, the current collecting pole and the luffing arm move to a specified position, the control module controls the brake and the electric rope winding device to stop, and the pole lowering is completed.

[0021] The emergency pole lowering instruction triggering step is as follows:

[0022] S11, the control module continuously detects the voltage of the electrical connection of the current collector;

[0023] S12, the amplitude of the voltage reduction in a unit time is judged, if the voltage reduction amplitude is greater than a set threshold, it is considered that the current collector is off the network, the emergency pole lowering instruction is triggered, otherwise it returns to step S11 for continuous detection.

[0024] The present scheme has the following beneficial effects relative to the prior art:

[0025] The present scheme cancels the pole lowering cylinder and the auxiliary structure in the traditional current collector structure, cancels the return cylinder and the auxiliary structure, releases the space in the height direction occupied by these structures, thereby reducing the overall height of the current collector when lowering the pole, improving the space in the passenger cabin. The present scheme simplifies the overall structure and the base, reduces the number, weight and inertia of the moving parts, reduces the high weight of the whole vehicle by nearly 100 kg, lowers the vehicle center of gravity, saves energy and reduces consumption, and simultaneously uses the electric rope winding device to realize the lifting and lowering of the luffing arm. Compared with the traditional cylinder, the response speed is fast, making it easier to control and adjust the height and position of the current collecting pole.

[0026] The traditional structure with a return cylinder, when the rotating seat rotates, the return cylinder dynamically follows the reciprocating motion, the cylinder volume alternately changes, and the air is alternately inhaled and exhausted, which brings resistance to the rotation, which is commonly known as "breathing". The present scheme cancels the return cylinder, so that the resistance is smaller when the rotating seat rotates, and the control is easier.

[0027] The scheme increases the brake for controlling the rotation of the rotating seat, and controls the length of the pull rope through the fast and continuous action of the electric rope reel, directly controls the geometric height of the current collector, avoids the uncontrolled left and right swing and the large amplitude upward action of the current collecting rod when the current collector is off the net at a large deflection angle, and quickly responds to avoid the accidents of hanging net, pulling wire, and hitting rod, damaging the wire net or similar facilities, pedestrians, etc. caused by the slow response of the action mechanism.

[0028] Preferably, the brake includes a brake shoe and a brake disc, the brake shoe is arranged on the base or the rotating seat, the brake disc is arranged on the rotating seat or the base, and the brake shoe acts to frictionally brake the brake disc; the power source for the action of the brake shoe is an electromagnet or a stepping motor. The electric actuator has fast response speed and can respond within milliseconds, and once off the net occurs, it immediately intervenes to control the rotating seat to avoid its left and right rotation. The electromagnet itself is a linear action, and the stepping motor itself is a rotary action, which can be converted into a linear action through threads or gear racks. The gap between the brake shoe and the brake disc is very small, so fast response can be achieved.

[0029] Preferably, the brake includes a stepping motor and a toothed disc, the toothed disc is provided with teeth, and the output shaft of the stepping motor is provided with a gear, and the gear is engaged with the teeth on the toothed disc. Through the combination of the gear and the toothed disc, the rotation angle can be more accurately controlled based on the accuracy of the stepping motor. The lifting rod deflection correction can also be performed through them.

[0030] Preferably, the brake is one of a hydraulic damper, a magnetic damper, and a magnetic powder damper. Compared with the aforementioned external brake, the hydraulic damper, the magnetic damper, or the magnetic powder damper is arranged inside a closed shell, which can reduce the influence of the external environment and work more stably.

[0031] Further, the rotating seat is provided with an angle sensor, and the angle sensor is used to sense the current rotation angle of the rotating seat. In this way, the rotating seat can be accurately controlled to return to the correct position.

[0032] Further, the brake is provided with a protective cover. In low temperature, rainy and snowy weather, the protective cover can prevent water and ice from entering the brake and affecting the braking effect.

[0033] Further, a tail hook is further included, the tail hook is arranged at the tail of the roof, and the tail hook is provided with a positioning groove for fixing the current collecting rod in the working position.

[0034] Further, a guide device is further arranged, the position of the guide device is matched with the position of the positioning groove of the current collecting rod on the tail hook, and the pull rope passes through the guide device to connect the current collecting rod. This ensures that the pull rope can accurately pull the current collecting rod back to the positioning groove, achieving accurate positioning.

[0035] Further, an elevation angle sensor is further included for sensing the current elevation angle of the tilt arm, so that the control module can make a judgment based on the data.

[0036] When the off-line condition is sensed, the brake, the electric rope winding device and the rotating seat act in time, the electric rope winding device winds the pull rope to lower the pole, the rotating movement of the rotating seat is braked, the electric rope winding device continuously provides a downward pull force and a positive horizontal component force greater than the pull force of the large tension spring, the positive horizontal component force drives the rotating seat to rotate, the brake provides a negative component force slightly smaller than the positive horizontal component force, so that the rotating seat rotates back to the normal position slowly, the uncontrolled rotation of the rotating device is eliminated, and the pole is prevented from rising greatly (the length of the two fixed ends of the pull rope of the electric rope winding device does not change or the elasticity increases) when the current collector pole is off-line. The electric control response speed is much better than the pneumatic control, the force point of the pull rope on the current collector pole is directly located at the action demand end, and the comprehensive response performance is good. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a first state schematic view of the pole lowering mechanism of the trackless trolleybus automatic lifting current collector of the utility model;

[0038] Figure 2 It is a structure schematic view of the rotating seat in the embodiment 1 of the utility model;

[0039] Figure 3 It is a partial structure schematic view of the brake in the embodiment 1 of the utility model;

[0040] Figure 4 It is a structure schematic view of the electric rope winding device in the embodiment 1 of the utility model;

[0041] Figure 5 It is a position structure schematic view of the tail hook and the guide device in the embodiment 1 of the utility model;

[0042] Figure 6 It is a structure schematic view of the brake in the embodiment 2 of the utility model;

[0043] Figure 7 It is a structure schematic view of the brake in the embodiment 3 of the utility model;

[0044] Figure 8 It is a specific structure schematic view of the transmission shaft in the embodiment 3 of the utility model;

[0045] Figure 9 It is a force condition schematic view of the current collector pole when the pole is lowered.

[0046] In the drawings, the component name list represented by each mark is as follows:

[0047] 1, base; 2, rotating seat; 3, pitch arm; 4, large tension spring; 5, current collecting rod; 6, current collecting head; 7, brake shoe; 8, brake disc; 9, electric rope reel; 10, pull rope; 11, tail hook; 12, positioning groove; 13, guide device; 14, protective cover; 15, gear disc; 16, stepping motor; 17, rotating shaft; 18, damper; 19, vertical shaft; 20, rope storage wheel. DETAILED DESCRIPTION

[0048] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.

[0049] Embodiment 1:

[0050] Figure 1 It is an overall arrangement front view, and the length from the current collecting head 6 to the planar hinge point of the pitch arm 3 and the rotating seat 2 is about 6.5 meters. The current collecting rod 5 is a diameter-gradually-changing circular tube, is an elastic slender tube, the thick end is inserted into the pitch arm 3 and is fastened with the pitch arm 3, and the relatively thin tail end is fixed with the current collecting head 6.

[0051] The current collector comprises a control module, a rotating seat 2, a base 1 fixedly connected with the roof of the vehicle, a pitch arm 3, the base 1 is provided with a vertical shaft 19, the vertical shaft 19 is perpendicular to the roof surface, the rotating seat 2 can be flexibly rotated on the vertical shaft 19; further comprising a brake for controlling the rotation of the rotating seat 2, the brake comprises a brake shoe 7, a brake disc 8 and a power component for controlling the action of the brake shoe 7, the brake disc 8 is integrally processed on the rotating seat 2, the brake shoe 7 is arranged in pairs on the base 1, and the power component can be a pneumatic cylinder, a hydraulic cylinder, a motor, an electromagnet and the like, preferably a motor and an electromagnet, and the rotating seat 2 is installed on the vertical shaft 19 through a bearing to realize free rotation.

[0052] The purpose of the brake is to brake the rotating movement of the rotating seat 2, and a protective cover 14 is further arranged outside the brake to prevent rain, snow and sundries from entering the brake and affecting the braking effect of the brake; one end of the pitch arm 3 and one end of the large tension spring 4 are hingedly arranged on the rotating seat 2 respectively, the other end of the pitch arm 3 is fixedly connected with the current collecting rod 5, and the other end of the current collecting rod 5 is fixedly connected with the current collecting head 6; the other end of the large tension spring 4 is hingedly connected to the pitch arm 3.

[0053] An electric rope reel 9 is arranged at the tail part of the vehicle, the electric rope reel 9 comprises a pull rope 10, a rope storage wheel 20 and a motor, the pull rope 10 uses a terylene rope with high cost performance, the motor uses a stepping motor 16 with three-in-one of a motor, a driver and a speed reducer on the market, and is controlled by an external control module or a centralized control of a vehicle control module; the two ends of the pull rope 10 are connected to the current collecting rod 5 close to the current collecting head 6 and the rope storage wheel 20 respectively.

[0054] The tail hook 11 is fixedly arranged at the tail of the roof, and two collector pole 5 positioning grooves 12 are arranged on the tail hook 11, the distance between the two positioning grooves 12 is similar to the distance between the slide contact lines; the pull rope 10 guide device 13 is arranged at the position corresponding to the positioning groove 12 of the tail hook 11, the guide device 13 is provided with a guide groove corresponding to the collector pole 5 positioning groove 12, and the pull rope 10 at least partially passes through the guide groove to connect the collector pole 5. The electric rope winding device 9 is arranged at the tail of the vehicle and has a ground clearance within 1-2 meters, so as to facilitate daily maintenance. The guide groove can also be a slope, a circular arc or the like structure having a guiding effect.

[0055] In this example, the action process when the collector pole is lowered is as follows: the control module controls the electric rope winding device 9 to rotate, drives the rope storage wheel 20 to rotate and wind the pull rope 10, and the linkage control brake is braked, as shown in Figure 9 As shown in the figure, the combination position of the collector pole and the pull rope is taken as the origin, the total pull force continuously generated by the pull rope 10 is F, the upward pull force of the large tension spring 4 is F3, the combined force of the downward component of the pull force F of the pull rope and the gravity is the downward pull force F0, the horizontal component of the pull force F of the pull rope is the horizontal force F1, and the damping braking force generated by the brake is the horizontal force F2. Therefore, F0>F3, and F1≥F2≥0, the stable lowering of the collector pole is realized, the brake controls the rotating seat 2 to stably and slowly rotate to the traction direction of the pull rope 10; the pull rope 10 lowers the collector pole 5 through the guide device 13 until the collector pole 5 reaches the positioning groove 12 position of the tail hook 11, and the lowering of the collector pole is completed. During the lowering process of the collector pole, the braking force of the brake is controlled to gradually decrease until zero.

[0056] The relationship of F1≥F2≥0 is different in different cases: when the vehicle is in the off-line operation to lower the collector pole, when the rotating seat 2 deviates from the return position by a large margin (estimated to be ±20°), F1>F2>0, when the rotating seat 2 deviates from the return position by a small margin, F1>F2, and F2=0; when the pitch arm is completely returned, F1=F2=0.

[0057] When the collector pole is raised, the motor of the electric rope winding device 9 is reversed, the pull rope 10 is released, and the collector pole 5 is raised under the pull force of the large tension spring 4.

[0058] Embodiment 2

[0059] In the previous embodiment, the brake works by friction, which is inevitably affected by the external environment, especially in rainy and snowy weather. Although the protective cover 14 is arranged, once water splashes on the brake disc 8, the braking effect will be affected, thereby affecting the braking force and causing the attitude of the current collector to be uncontrollable.

[0060] In this example, please see Figure 6, cancel the brake disc 8 and brake shoe 7 work by friction, replace the brake disc 8 to the gear disc 15, and set the stepper motor 16, which has a pinion gear meshing with the gear disc 15; when lowering the rod, rely on the torque control of the stepper motor 16 to provide damping force, and realize the control of the rotation angle of the rotating seat 2.

[0061] This scheme can also use the precise control of the rotation angle of the rotating seat 2 by the stepper motor 16 when raising the rod, to realize the precise tracking of the trolley 6 to the slide wire.

[0062] Embodiment 3

[0063] The brakes of the above two examples are external, and are inevitably affected by the external environment.

[0064] In this example, please see Figure 7 , cancel the external brake, and set the transmission shaft 17 and the damper 18 coaxially with the rotating seat 2; the transmission shaft 17 is inverted and passes through the hollow vertical shaft 19, the transmission shaft 17 is coaxial with the center of the rotating seat 2, one end of the transmission shaft 17 is fixedly connected to the rotating seat 2 and rotates together with the rotating seat 2; the damper 18 is fixedly connected to the fixed support, and the input end of the damper 18 is connected to the other end of the transmission shaft 17.

[0065] When lowering the rod, the damper 18 works to provide damping force to the rotation of the transmission shaft 17, and then realize the control of the rotation angle of the rotating seat 2.

[0066] The damper 18 can be any kind of generalized damper that can provide damping force, such as a magnetic powder damper, a magnetic damper, a hydraulic damper, etc.

[0067] Since the working components are located inside the shell, they are no longer affected by the weather and other external factors.

[0068] Embodiment 4, the emergency lowering rod method when the collector deviates from the line and off the network, comprising the following steps:

[0069] S11, detecting the voltage and the value of the elevation angle sensor connected to the collector;

[0070] S12, judging the fluctuation amplitude of the voltage reduced per unit time and the value of the elevation angle sensor, if the voltage reduction amplitude is greater than the set threshold value, and the elevation angle value has a positive mutation and is greater than the set threshold value, it is considered that the collector is off the network, and step S2 is executed, otherwise, return to step S11 for continuous detection;

[0071] S2, the control module controls the immediate start of the brake and the electric rope reel 9, and the rope is quickly reeled in for S seconds, such as 2 seconds, to reduce the height of the current collector pole 5, since the vehicle is in off-line operation at this time, the pitch arm has a large deflection angle from the normal position, the pulling force of the electric rope reel 9 on the current collector pole 5 has a horizontal component F1, which drives the rotation of the rotating seat 2, the brake generates a damping force F2, F2 is opposite to F1, and F1>F2, so that the rotating seat 2 slowly rotates back to the normal position, avoiding uncontrollable large horizontal rotation; in S seconds, the emergency rope reeling action is sufficient to lower the current collector pole 5 by a certain height, and the purpose of this step is to control the height of the current collector pole 5, avoid the current collector pole 5 from rising at the moment of disengaging the line, and avoid the situation of hitting the slide wire.

[0072] The control module controls the immediate start of the brake and the electric rope reel 9, and the rope is quickly reeled in for S seconds, such as 2 seconds, to reduce the height of the current collector pole 5, since the vehicle is in off-line operation at this time, the pitch arm has a large deflection angle from the normal position, the pulling force of the electric rope reel 9 on the current collector pole 5 has a horizontal component F1, which drives the rotation of the rotating seat 2, the brake generates a damping force F2, F2 is opposite to F1, and F1>F2, so that the rotating seat 2 slowly rotates back to the normal position, avoiding uncontrollable large horizontal rotation; in S seconds, the emergency rope reeling action is sufficient to lower the current collector pole 5 by a certain height, and the purpose of this step is to control the height of the current collector pole 5, avoid the current collector pole 5 from rising at the moment of disengaging the line, and avoid the situation of hitting the slide wire.

[0073] As the pitch arm gradually returns to the normal position, the brake force of the brake can also be controlled to gradually decrease until zero, so that the rotating seat 2 can rotate freely, and the electric rope reel 9 stops the rope reeling action, at this time, the pitch arm still has a certain angle of elevation, but this angle of elevation is lower than the angle of elevation in normal operation, and the current collector head is located below the slide wire by a certain distance, and the angle of elevation is preferably 1 / 3-1 / 2 of the current working angle of elevation.

[0074] S3, the current collector head (6), the current collector pole (5) and the pitch arm (3) move to a specified position, the control module controls the stop of the brake and the electric rope reel (9), the emergency pole lowering is completed, the staff intervenes, the electric rope reel 9 is reversely rotated by manual control, the pulling rope 10 is released, and the re-networking is realized.

[0075] It should be noted that, because it is an emergency pole lowering, the vehicle needs to continue to move forward after the emergency state is over, so the driver needs to re-network, and therefore it is not necessary to completely collect the current collector pole 5 back to the storage state after the height of the current collector pole 5 is controlled, which is convenient for the driver to quickly reset the network.

[0076] In addition, the control module also reads the vehicle speed information, and the controller does not automatically control when the vehicle speed is 0.

[0077] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A trolleybus automatic lifting collector lowering mechanism, comprising a base (1), a rotating base (2), a pitching arm (3), and a large tension spring (4); the rotating base (2) is rotatably arranged on the base (1); the pitching arm (3) comprises a mounting end and a working end; the mounting end of the pitching arm (3) is hingedly mounted on the rotating base (2); one end of the large tension spring (4) is hingedly connected to the rotating base (2), and the other end is hingedly connected to the pitching arm (3); the working end of the pitching arm (3) is fixed to one end of a collector rod (5); the other end of the collector rod (5) is the working end; the working end of the collector rod (5) is fixed to a collector head (6); the pitching arm (3), the collector rod (5), and the collector head (6) are arranged in a common vertical plane; the collector head is used to contact the busbar to electrically connect the power grid and the vehicle; and they are jointly mounted on the roof of the vehicle; It is characterized in that It also includes a brake, an electric rope reel (9), and a control module, wherein the brake controls the rotation of the rotating seat (2); the electric rope reel (9) is fixed to the rear of the vehicle, a pull rope (10) is provided inside the electric rope reel (9), and the free end of the pull rope (10) is fixed to a position of the collector pole (5) close to the working end; The control module is used to detect the electrical connection status of the collector pole and control the coordinated operation of the electric rope reel (9) and the brake; when lowering the pole, the control module controls the damping force generated by the brake to be smaller than the component force of the pull rope (10) in the horizontal direction.

2. The rod lowering mechanism for the automatic lifting collector of a trolleybus according to claim 1 is characterized in that: The brake comprises a brake shoe (7) and a brake disc (8); the brake shoe (7) is arranged on the base (1) or the rotating base (2); the brake disc (8) is arranged on the rotating base (2) or the base (1); the brake shoe (7) moves to rub against the brake disc (8) to achieve braking; the power source for the movement of the brake shoe (7) is an electromagnet or a stepping motor.

3. The rod lowering mechanism for the automatic lifting collector of a trolleybus according to claim 1, characterized in that: The brake comprises a stepping motor and a toothed disc (15), wherein the toothed disc (15) is provided with gear teeth, and an output shaft of the stepping motor is provided with a gear, and the gear is meshed with the gear teeth on the toothed disc (15).

4. The rod lowering mechanism for the automatic lifting collector of a trolleybus according to claim 1, characterized in that: The brake is a hydraulic damper, a magnetic damper, or a magnetic powder damper.

5. The rod lowering mechanism for the automatic lifting collector of a trolleybus according to any one of claims 1 to 4, characterized in that: An angle sensor is provided on the rotating seat (2), and the angle sensor is used to sense the current rotation angle of the rotating seat (2).

6. The rod lowering mechanism for the automatic lifting collector of a trolleybus according to any one of claims 1 to 3, characterized in that: The brake is provided with a protective cover (14).

7. The rod lowering mechanism for the automatic lifting collector of a trolleybus according to any one of claims 1 to 4, characterized in that: It also includes a tail hook (11), which is arranged at the rear of the vehicle roof. The tail hook (11) is provided with a positioning groove (12) for fixing the collector pole (5) at the closing position.

8. The rod lowering mechanism for the automatic lifting collector of a trolleybus according to claim 7, characterized in that: A guide device (13) is also provided, the position of the guide device (13) is adapted to the position of the tail hook (11), and the pull rope (10) is connected to the collector pole (5) through the guide device (13).

9. The rod lowering mechanism for the automatic lifting current collector of a trolleybus according to any one of claims 1 to 4, characterized in that: It also includes an elevation angle sensor, which is used to sense the current elevation angle of the pitch arm.

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