CN108868443A - A kind of carrying driving mechanism for train-door system - Google Patents

Abstract

The invention discloses a load-bearing driving mechanism for a vehicle door system, which includes a fixed frame, a slideway arranged on the fixed frame, a load-bearing horizontal bracket, a long guide column, a drive assembly, a locking mechanism, and a left nut assembly, right nut assembly, left slider, right slider, left hanger and right hanger, the drive assembly includes screw, drive motor and door controller, the locking mechanism is set in the middle of the load-bearing horizontal bracket, the left nut assembly, right The nut assembly is nested on the screw rod, the left sliding cylinder and the right sliding cylinder are both nested on the long guide column, the left nut assembly is connected with the left sliding cylinder through the linkage frame, and the right nut assembly is connected with the right sliding cylinder through the linkage frame. The two ends of the long guide post are all provided with deep groove ball bearings, and the deep groove ball bearings roll in the chutes of the left hanger and the right hanger respectively, and there are small rollers on the mounting plate. The invention has simple structure, is convenient for installation, debugging and maintenance, has small running resistance, can monitor the state of the driving mechanism, runs smoothly, has low noise, and has high rigidity.

Description

A bearing driving mechanism for vehicle door system

technical field

The invention relates to the field of rail transit doors, in particular to a bearing driving mechanism for a vehicle door system.

Background technique

The bearing driving mechanism of the existing vehicle door system is mainly composed of three parts: bearing, driving and locking. The screw rod is driven by the motor to drive the nut assembly arranged on the screw rod to reciprocate, and then drives the controlled object connected with the nut assembly to realize sports.

The load-bearing drive mechanism is mostly used in public transportation fields such as rail transit and buses. Since the connection between the fixed end and the load-bearing drive part uses a connecting rod, there is a transverse gap between the two during the longitudinal relative movement. The position of the driving part is shifted until one side of the load-bearing drive part is in full contact with the side of the fixed end, so that the self-aligning ball bearing installed at the end of the load-bearing drive part far exceeds the theoretical self-aligning angle of the self-aligning ball bearing, resulting in the stagnation of the bearing Sliding friction, so that the dry friction between the load-bearing drive part and the fixed end will cause excessive running resistance and cause stagnation, and will generate relatively large noise. Belts or wire ropes are often used in the mechanism to pull the active door and the driven door, which limits the load-carrying capacity of the drive mechanism, and it is impossible to judge whether the side of the linkage mechanism is locked or opened, especially when the vehicle is running. Once the towed side is out of control, there will be a great potential safety hazard; secondly, the structure is complex, the precision of the parts is high, and the weight is heavy.

Contents of the invention

Purpose of the invention: In order to overcome the deficiencies in the prior art, the purpose of the invention is to provide a load-carrying drive mechanism for vehicle door systems that has no lateral play, stable operation and low noise.

Technical solution: A load-carrying drive mechanism for a vehicle door system according to the present invention includes a fixed frame, a slideway arranged on the fixed frame, a load-bearing horizontal bracket, and a long guide column, a drive assembly, a locking Mechanism, left nut assembly, right nut assembly, left sliding cylinder, right sliding cylinder, left hanger and right hanger, drive assembly including screw, drive motor and door controller, long guide post and load-bearing horizontal bracket through installation at both ends The locking mechanism is set in the middle of the load-bearing horizontal bracket. The left nut assembly and the right nut assembly are both nested on the screw rod, and the left sliding cylinder and the right sliding cylinder are both nested on the long guide column. The moving frame is connected with the left sliding cylinder, and the right nut assembly is connected with the right sliding cylinder through the moving frame, which improves the overall rigidity and carrying capacity of the mechanism. Both ends of the long guide column are equipped with deep groove ball bearings, and the deep groove ball bearings are respectively in the The chute of the left hanger and the right hanger rolls in the chute, and there are small rollers on the mounting plate, which is beneficial to eliminate the play between the horizontal directions, and is conducive to ensuring the smooth operation of the mechanism and reducing the operating noise.

The locking mechanism includes emergency unlock switch, close limit switch, lock limit switch, left switch pressure plate, right switch pressure plate and unlock switch pressure plate, emergency unlock switch, close limit switch, lock limit switch are connected with the door controller, left switch pressure plate is connected The in-position switch is connected, the right switch pressure plate is connected with the lock in-position switch, and the emergency release switch is connected with the unlock switch pressure plate. The left nut assembly and the right nut assembly both include a nut sleeve 1, a locking torsion spring, a nut sleeve 2, a left-handed nut, a roller shaft and a load wheel, and the load wheel is respectively connected to the left switch pressure plate and the right switch pressure plate through the lock torsion spring One end of the roller shaft is equipped with a load-bearing wheel through a circlip, and the other end is fixedly connected with the second nut sleeve. There is a left-handed nut inside the second nut sleeve. The spring is used to limit the angle of rotation around the axis. The unlocking switch pressing plate is connected with the manual unlocking device.

The fixed frame is fixedly connected with the left locking slideway and the right locking slideway. A pressure plate is provided at the end of the deep groove ball bearing. The upper part of the left sliding cylinder is equipped with a roller assembly. The left slide cylinder is fixedly connected with the left door leaf, and the right slide cylinder is fixedly connected with the right door leaf, thereby realizing the switch of the left door leaf and the right door leaf. Both the left side hanger and the right side hanger are connected with the synchronous fork.

Working principle: The screw rod rotates forward to drive the left nut assembly, the right nut assembly and the carrying wheel of the follower to the space formed by the left locking slideway, the right locking slideway, and the locking mechanism to be locked, and the loading wheel Under the force of the locking torsion spring, the left switch pressure plate and the right switch pressure plate are pressed down, and then the switch in-position switch and the lock in-position switch are turned off, and the signal is sent back to the door controller to monitor whether the door is in the closed in-position state, and the screw reverses at this time The loading wheel will break away from the space formed by the left locking slideway, the right locking slideway and the locking mechanism, and move along the axial direction of the screw rod. The open position switch and the lock position switch reply a signal to the door controller to monitor whether the door is in a closed state.

Beneficial effects: Compared with the prior art, the present invention has the following remarkable features: the present invention has a simple structure, is convenient for installation, commissioning and maintenance, light in weight, small in running resistance, capable of real-time monitoring of the motion state of the driving mechanism, stable in operation and low in noise, and Higher rigidity; the integrated design of the bearing and driving components of the present invention is conducive to simplifying the parts of the mechanism, saving space and light weight, and being able to adapt to various car body interfaces; the driving part of the present invention passes through left and right The screw rod and the nut pair on both sides are connected to the load-bearing part, which is beneficial to improve the rigidity and load-carrying capacity of the whole mechanism; the middle part of the present invention is equipped with a lock in place and a close in place switch to monitor the switch state of the linkage mechanism, which can monitor the motion state of the drive mechanism in real time , which is beneficial to ensure the stability and safety during operation; both sides of the load-bearing driving mechanism and the fixed end of the present invention are equipped with longitudinally movable rolling bearings, which is beneficial to eliminate the clearance between the horizontal direction and ensure the stable operation of the mechanism It is beneficial to reduce the noise of operation.

Description of drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a left view of the present invention.

Fig. 3 is a schematic view of the end structure of the bearing driving mechanism of the present invention.

Fig. 4 is a schematic structural diagram of the locking mechanism of the present invention.

Fig. 5 is a driving principle diagram of the present invention.

Fig. 6 is a schematic structural view of the nut assembly of the present invention.

Detailed ways

As shown in Figure 1, the fixed frame 1 is fixed on the vehicle, the fixed frame 1 is fixedly connected with the slideway 2, and the drive assembly 4 for driving the doors on both sides is arranged on the load-bearing horizontal support 3, and the drive assembly 4 includes a screw rod 403 and a drive motor 401 And door controller 402, there are right lock slideway 5 and left lock slideway 6 on both sides of load-bearing horizontal support 3, fixed frame 1 is fixedly connected with left lock slideway 5, right lock slideway 6, bearing There is a locking mechanism 7 in the middle of the horizontal bracket 3, the left nut assembly 8 is connected with the left sliding cylinder 10 through the linkage frame 19, the right nut assembly 9 is connected with the right sliding cylinder 11 through the linkage frame 19, and the left sliding cylinder 10 is fixed with the left door leaf Connect, the right sliding cylinder 11 is fixedly connected with the right door leaf. The left side hanger 14 and the right side hanger 13 are all linked to each other with the synchronous fork 15.

As shown in Figure 2-3, the long guide post 12 is connected to the load-bearing horizontal bracket 3 through the mounting plates 16 at both ends. Both ends of the long guide post 12 have deep groove ball bearings 17, and the deep groove ball bearings 17 are respectively installed on the left hanger 14, Roll in the chute of right hanger 13, the end of deep groove ball bearing 17 is provided with pressing plate 20, the inner ring of pressing plate 20 presses the inner ring of self-aligning ball bearing 17, there is a certain gap between outer ring and self-aligning ball bearing 17, has guaranteed The self-aligning angle of the self-aligning ball bearing 17 is within the safe range, which makes the operation of the load-bearing drive mechanism more stable and reduces the noise of operation. There are small rollers 18 on the mounting plate 16, which limit the overall movement of the load-bearing drive part and will not produce lateral vibrations. displacement.

As shown in Figure 4, the outer side of the left nut assembly 9 and the right nut assembly 10 is provided with a bearing wheel assembly 806 that rolls in the axial direction, and the upper part of the left slider 10 is fitted with a roller assembly 111, and the locking mechanism includes an emergency release switch 701, a close-to-position switch 702, lock in place switch 703, left switch pressure plate 705, right switch pressure plate 706 and unlock switch pressure plate, emergency unlock switch 701, close in place switch 702, lock in place switch 703 are connected with door controller 402, left switch pressure plate 705 and close in place switch 702 links to each other, right switch pressing plate 706 links to each other with lock in place switch 703, emergency release switch 701 links to each other with unlocking switch pressing plate.

As shown in Figure 5, the door controller 402 controls the drive motor 401 to drive the screw rod 403 to rotate. 8. The right nut assembly 9 respectively controls the left sliding cylinder 10 connected to the left door leaf and the right sliding cylinder 11 connected to the right door leaf to slide along the long guide post 12 through the linkage frame 19, thereby realizing the switch of the left door leaf and the right door leaf. The middle part of the rod 403 is provided with a manual unlocking device 704. The manual unlocking device 704 is used to control the unlocking of the left door leaf and the right door leaf, and can trigger the emergency unlock switch 701 to monitor the switch state of the door. By operating the manual unlocking device 704, the locking can be controlled. The mechanism 7 rotates the carrying wheels 806 out of the locked position, and the left and right carrying wheels 806 rotate to the moving surfaces of the left locking slideway 6 and the right locking slideway 5 to realize unlocking.

As shown in Figure 6, one end of the roller shaft 805 is equipped with a load wheel 806 through a circlip, and the load wheel 806 can rotate axially along the roller shaft 805. The nut 804, the above-mentioned structure is integrally set into the nut set 1 801 and can rotate around the axis. The set locking torsion spring 802 limits its rotation angle and exerts a holding force to ensure the reliability of locking.

The screw rod 403 forwardly rotates to drive the right nut assembly 9 to move in the axial direction, and the linkage frame 19 drives the right sliding cylinder 11 and the roller assembly 111 set on the left sliding cylinder assembly 11 to move in the axial direction together. 2. The inner cavity forms a plugging movement at an angle of 35 degrees to the outside along the track of the slideway, that is, the combined movement along the axial direction of the screw 403 and the radial direction of the screw 403. At this time, the long guide of the right sliding cylinder 11 is sleeved The column 12 and the driving assembly 4 are fixedly connected with the load-carrying horizontal bracket 3 to form a whole to complete the radial movement in the movement of the above-mentioned track. 14 and the right side hanger 13 roll in the chute, the hanging machine 14 on the left side and the hanging machine 13 on the right side are the fixed parts of the bearing drive mechanism, and its top is connected with the synchronous fork 15 to ensure the overall coordination and consistency of the movement.

Claims (9)

1. A load-bearing driving mechanism for a vehicle door system, comprising a fixed frame (1) and a slideway (2) arranged on the fixed frame (1), and a load-bearing horizontal bracket (3), characterized in that: Including long guide post (12), drive assembly (4), locking mechanism (7), left nut assembly (8), right nut assembly (9), left slider (10), right slider (11), left Hanger (13) and right hanger (14), described driving assembly (4) comprises screw mandrel (403), driving motor (401) and door controller (402), and described long guide column (12) and bearing The horizontal bracket (3) is connected through the mounting plates (16) at both ends, the locking mechanism (7) is arranged in the middle part of the bearing horizontal bracket (3), the left nut assembly (8), the right nut assembly (9), and Nested on the screw rod (403), the left slider (10) and the right slider (11) are both nested on the long guide post (12), and the left nut assembly (8) passes through the linkage frame ( 19) Connected with the left slider (10), the right nut assembly (9) is connected with the right slider (11) through the linkage frame (19), and deep grooves are set at both ends of the long guide post (12) Ball bearings (17), the deep groove ball bearings (17) roll in the chutes of the left hanger (13) and the right hanger (14) respectively, and there are small rollers (18) on the mounting plate (16) . 2. A load-carrying drive mechanism for a vehicle door system according to claim 1, characterized in that: the locking mechanism (7) includes an emergency unlock switch (701), a close-to-position switch (702), a lock-to-position Switch (703), left switch pressing plate (705), right switching pressing plate (706) and unlocking switch pressing plate, described emergency unlocking switch (701), close limit switch (702), lock limit switch (703) and door controller ( 402), the left switch pressure plate (705) is connected with the close position switch (702), the right switch pressure plate (706) is connected with the lock position switch (703), and the emergency unlock switch (701) is connected with the unlock switch pressure plate connected. 3. A load-bearing driving mechanism for a vehicle door system according to claim 2, characterized in that: the left nut assembly (8) and the right nut assembly (9) both include a nut sleeve (801), a lock Closing torsion spring (802), nut sleeve two (803), left-handed nut (804), roller shaft (805) and bearing wheel (806), and described bearing wheel (806) is respectively connected with the left by locking torsion spring (802) The switch pressure plate (705) is connected with the right switch pressure plate (706). One end of the roller shaft (805) is equipped with a load wheel (806) through a clip spring, and the other end is fixedly connected with the nut sleeve two (803). The nut There is a left-handed nut (804) in the second sleeve (803). The left-handed nut (804) and the second nut sleeve (803) are put into the first nut sleeve (801) and can rotate around the axis. The locking torsion spring (802 ) is used to limit the angle of rotation around the axis. 4. The load-carrying driving mechanism for a vehicle door system according to claim 2, characterized in that: the unlocking switch pressing plate (701) is connected to a manual unlocking device (704). 5. A load-carrying drive mechanism for a vehicle door system according to claim 1, characterized in that: the fixed frame (1) is connected to the left locking slideway (6) and the right locking slideway (5) ) fixed connection. 6. The load-carrying driving mechanism for a vehicle door system according to claim 1, characterized in that: a pressure plate (20) is provided at the end of the deep groove ball bearing (17). 7. The load-carrying driving mechanism for a vehicle door system according to claim 1, characterized in that: a roller assembly (111) is sleeved on the upper part of the left sliding cylinder (10). 8. A load-bearing driving mechanism for a vehicle door system according to claim 1, characterized in that: the left sliding cylinder (10) is fixedly connected to the left door leaf, and the right sliding cylinder (11) is connected to the right door leaf Fixed connection. 9. A load-bearing driving mechanism for a vehicle door system according to claim 1, characterized in that: the left hanger (13) and the right hanger (14) are both connected to a synchronous swing rod (15).