Drive unit based on emergency unlocking device and door opening method thereof

Abstract

The application relates to a driving unit based on an emergency unlocking device and a door opening and closing method thereof. The driving unit based on the emergency unlocking device comprises a motor, and output shafts of the motor extend to the outside from two opposite ends thereof, one end of which is used for being connected with a driven part, and the other end is connected with one end of a flange, and the other end of the flange is fixed on the end face of the outer ring of an overrunning clutch. Beneficial effects: compared with the prior art, the application is provided with a traditional emergency unlocking device, can realize bidirectional intermittent driving function, can completely meet the requirement of emergency manual opening and closing of a train garage door at any position, has the advantages of simple structure, high, good universality and low cost, and the like, thereby improving the reliability and safety of full-automatic operation of the train, and having very good engineering application prospect.

Description

Technical Field

[0001] This invention relates to the technical field of rail transit train depot doors, folding doors, etc., and particularly to drive units for train depot doors, folding doors, etc., specifically to a drive unit based on an emergency unlocking device. Background Technology

[0002] In the field of rotary drive (such as door opening and closing), how to design an emergency lock is a critical issue, that is, to be able to manually unlock the door (such as switching between the two states of opening and closing) when the drive force fails (such as power failure).

[0003] With the rapid development of urban rail transit in my country, urban rail vehicles primarily aim to transport passengers quickly and in large quantities safely. Fully automated train operation has become the mainstream development trend. The train depot door system is a crucial component of the depot's process equipment, providing automatic, safe, and reliable door opening and closing functions for rail vehicles entering and exiting the depot. In fully automated depots, one set of train depot doors is installed at each end of the inspection depot track and the washing depot. Currently, the train depot doors adopt a 90° folding door structure, and their automatic opening, closing, and self-locking are controlled through the linkage of the signal system. The drive unit is the key core of the train depot door system; its reliability and safety directly affect the operation of the trains. When an emergency occurs during the operation of the depot's process equipment (such as fire, power supply failure, control system failure, signal system failure, etc.), manual operation of the drive unit's emergency unlocking device is required to open or close the train depot door to prevent major accidents. Therefore, a safe and reliable emergency unlocking function is crucial for the train depot door system. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to design a drive unit based on an emergency unlocking device that can be manually unlocked when the drive force fails, and switch between the two states.

[0005] The specific plan is as follows:

[0006] A drive unit based on an emergency unlocking device includes a motor. The motor's output shaft extends from its two opposite ends to the outside. One end is connected to a driven component, and the other end is connected to one end of a flange. The other end of the flange is fixed to the end face of the outer ring of an overrunning clutch. The outer ring of the bidirectional overrunning clutch is located within a support base. The bidirectional overrunning clutch includes an inner ring and an outer ring, with a bearing between them. A shift fork is fixed to the inner ring, and the shift fork has a first shift head and a second shift head. A support base is fixed to the motor, and an end cover is fixed to the support base. A left wire rope fixing support and a right wire rope fixing support are symmetrically arranged on the end cover. The left wire rope fixing support... The support is equipped with a left wire rope assembly, and the right wire rope fixed support is equipped with a right wire rope assembly. Both the left and right wire rope assemblies have a point fixed to the manual cam. The inner ring of the bidirectional overrunning clutch is fixedly connected to the connecting shaft. The connecting shaft rotates to connect the manual cam, and the manual cam can rotate around the connecting shaft. The manual cam is fixed with pin A, and the end cover is fixed with pin B. Pin A and pin B are connected by a tension spring. Ball plungers A and B are symmetrically arranged and fixed on the support. The included angle β of ball plungers A and B around the circumference of the support is slightly smaller than the included angle θ of the two adjacent shifters of the bidirectional overrunning clutch, and they are enveloped between the two adjacent shifters.

[0007] A flange is connected to a cam, enabling the flange and the cam to rotate synchronously; two micro switch assemblies are symmetrically arranged on the end face of the motor: left micro switch assembly A and right micro switch assembly A; two micro switch assemblies are symmetrically arranged on the end cover: left micro switch assembly B and right micro switch assembly B; the cam cooperates with the left micro switch assembly A and right micro switch assembly A to determine the circumferential position of the cam, and the manual cam cooperates with the left micro switch assembly B and right micro switch assembly B to determine the circumferential position of the manual cam.

[0008] A manual cam is fitted over the connecting shaft; the ends of the wire ropes of the left and right wire rope assemblies are fixed on the manual cam; one end of the support is fixed to the end face of the motor output shaft by a screw assembly; the other end of the flange is connected to the outer ring end face of the bidirectional overrunning clutch by a shaft hole fit and a screw assembly.

[0009] The outer ring of the two-way overrunning clutch is mounted in the support seat via two support bearings; the manual cam is fixedly connected to the connecting shaft via key C and retaining ring A; the pin B is fixedly connected to the end cover and the support seat via threaded connection; the flange is connected to the cam via key B and retaining ring C; the end cover is mounted on one end of the support seat via shaft hole connection and screw assembly;

[0010] Pin A is fixedly connected to the manual cam via a threaded connection; ball plunger A and ball plunger B are symmetrically arranged and fixed on the support seat via threaded connections and nut assemblies; the inner ring of the two-way overrunning clutch is connected to the connecting shaft via key D and retaining ring B; the two ends of the tension spring are connected to pin A and pin B respectively.

[0011] A door opening and closing method based on a drive unit with an emergency unlocking device, using the aforementioned drive unit with an emergency unlocking device, wherein the output shaft of the motor connected to the driven component is connected to the train depot door, includes the following steps S2-S3 or S4-S5:

[0012] S2, Emergency Manual Unlocking Operation

[0013] At this time, when the motor output shaft acts as the driven shaft, it pulls the wire of the left wire rope assembly. The manual cam drives the inner ring and shift fork of the two-way overrunning clutch to rotate counterclockwise synchronously. At the beginning, the outer ring does not rotate. When the second shift head of the shift fork contacts the ball plunger A and is resisted by it, the inner ring, shift fork and outer ring of the two-way overrunning clutch mesh and rotate counterclockwise synchronously by an angle α. The outer ring of the two-way overrunning clutch drives the motor output shaft to rotate counterclockwise synchronously by an angle α through the connecting flange. This completes the counterclockwise one-way drive of the motor output shaft by the emergency unlocking device, thereby realizing the emergency manual door opening function of the train depot door drive unit.

[0014] S3, Reset of the manual cam after manually opening the door.

[0015] After the train depot door is manually opened, the motor itself still has no power. The motor output shaft acts as the driven shaft. At this time, the tension acting on the left wire rope assembly is removed. Under the action of the tension spring's reset tension, the manual cam drives the inner ring and shift fork of the two-way overrunning clutch to rotate clockwise by angle β to the reset position. When the two-way overrunning clutch rotates from counterclockwise to clockwise, its inner ring, shift fork, and outer ring are disengaged. At the initial stage of clockwise rotation, angle β1, since neither of the two shift heads of the two-way overrunning clutch shift fork is subjected to resistance, the inner ring, shift fork, and outer ring of the two-way overrunning clutch always remain disengaged, and the outer ring remains stationary.

[0016] At the final stage of clockwise rotation at angle β2, although the second pawl of the two-way overrunning clutch fork contacts the ball plunger A and is resisted by it, the inner ring, fork, and outer ring of the two-way overrunning clutch remain briefly engaged. The reset tension of the tension spring is very small and insufficient to overcome the load resistance or friction at the end of the motor to make the motor output shaft rotate clockwise synchronously. Therefore, the emergency unlocking device can be manually activated: the motor output shaft rotates counterclockwise by angle α and after manual reset, the state of the motor output shaft remains unchanged, and the train depot door remains open.

[0017] S4. Emergency manual door closing operation

[0018] When the output shaft of motor 1 is used as the driven shaft, it pulls the wire of the right wire rope assembly. The manual cam overcomes the tension of the tension spring and rotates clockwise by an angle β to the right manual limit position under the action of the tension F at the end of the wire rope. Then it triggers the right micro switch assembly B to realize the automatic detection function of the manual right position.

[0019] At the same time, the manual cam drives the inner ring and shift fork of the two-way overrunning clutch to rotate clockwise synchronously. When the first shift fork contacts the ball plunger B and is resisted by it, the inner ring and shift fork of the two-way overrunning clutch mesh with the outer ring and rotate clockwise synchronously by an angle α. The outer ring of the two-way overrunning clutch drives the motor output shaft to rotate clockwise synchronously by an angle α through the flange, thus completing the clockwise unidirectional drive of the motor output shaft by the emergency unlocking device, thereby realizing the emergency manual closing function of the train depot door drive unit, and the train depot door is in the closed position.

[0020] S5. Reset of manual cam after manually closing the door.

[0021] When the motor output shaft is used as the driven shaft, the tension acting on the right wire rope assembly is removed. Under the action of the tension spring's reset tension, the manual cam drives the inner ring and shift fork of the two-way overrunning clutch to rotate counterclockwise by angle β to the reset position. When the two-way overrunning clutch rotates from clockwise to counterclockwise, its inner ring, shift fork, and outer ring are disengaged. At the initial stage of counterclockwise rotation, angle β1, since neither of the two shift heads of the two-way overrunning clutch shift fork is subjected to resistance, the inner ring, shift fork, and outer ring of the two-way overrunning clutch always remain disengaged.

[0022] At the end of the counterclockwise rotation, the angle β2 is very small. Although the first shifter of the bidirectional overrunning clutch fork contacts the ball plunger B and is resisted by it, the inner ring, shifter fork and outer ring of the bidirectional overrunning clutch remain briefly engaged. However, at the end of the counterclockwise rotation, the return force of the tension spring is very small and insufficient to overcome the load resistance or friction at the end of the motor to make the motor output shaft rotate clockwise synchronously. Therefore, the emergency unlocking device can be manually activated: the motor output shaft rotates counterclockwise by an angle α and after manual reset, the state of the motor output shaft remains unchanged, and the train depot door remains closed.

[0023] Beneficial effects: Compared with the prior art, the present invention is equipped with a traditional emergency unlocking device, which can realize bidirectional intermittent drive function. It can fully meet the needs of emergency manual opening and closing of train depot doors at any position. It has the advantages of simple structure, high efficiency, good versatility and low cost, thereby improving the reliability and safety of fully automatic train operation and has very good engineering application prospects. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the present invention.

[0025] Figure 2 yes Figure 1 A schematic diagram of the view along direction A.

[0026] Figure 3 for Figure 1 Schematic diagram of cross section along line BB.

[0027] Figure 4 yes Figure 1 A cross-sectional view along the CC line.

[0028] Figure 5 yes Figure 1 A schematic diagram of the view along direction D.

[0029] Figure 6 for Figure 1 A schematic diagram of the view along direction E.

[0030] Figure 7 This is a schematic diagram of a two-way overrunning clutch.

[0031] Figure 8 This is a schematic diagram of the working state of the present invention (I).

[0032] Figure 9 This is a schematic diagram (II) of the working state of the present invention.

[0033] Figure 10 yes Figure 8-9 A schematic diagram of the view along direction A.

[0034] Figure 11 yes Figure 8-9 Schematic diagram of cross section along line BB.

[0035] Figure 12 yes Figure 8-9 A cross-sectional view along the CC line.

[0036] Figure 13 for Figure 8 A schematic diagram of the view along direction E.

[0037] Figure 14 yes Figure 9 A schematic diagram of the view along direction E.

[0038] Figure 15 This is a schematic diagram (III) of the working state of the present invention.

[0039] Figure 16 for Figure 15 A schematic diagram of the view along direction A.

[0040] Figure 17 yes Figure 15 Schematic diagram of cross section along line BB.

[0041] Figure 18 yes Figure 15 A cross-sectional view along the CC line.

[0042] Figure 19 for Figure 15 A schematic diagram of the view along direction E.

[0043] Figure 20 This is a schematic diagram (four) of the working state of the present invention.

[0044] Figure 21 for Figure 20 A schematic diagram of the view along direction A.

[0045] Figure 22 yes Figure 20 Schematic diagram of cross section along line BB.

[0046] Figure 23 yes Figure 20 A cross-sectional view along the CC line.

[0047] Figure 24 for Figure 20 A schematic diagram of the view along direction E.

[0048] Figure 25 This is a schematic diagram (V) of the working state of the present invention.

[0049] Figure 26 for Figure 25 A schematic diagram of the view along direction A.

[0050] Figure 27 yes Figure 25 Schematic diagram of cross section along line BB.

[0051] Figure 28 yes Figure 25 A cross-sectional view along the CC line.

[0052] Figure 29 for Figure 25 A schematic diagram of the view along direction E.

[0053] Figure 30 This is a schematic diagram (six) of the working state of the present invention.

[0054] Figure 31 for Figure 30 A schematic diagram of the view along direction A.

[0055] Figure 32 yes Figure 30 Schematic diagram of cross section along line BB.

[0056] Figure 33 yes Figure 30 A cross-sectional view along the CC line.

[0057] Figure 34 for Figure 30 A schematic diagram of the view along direction E. Detailed Implementation

[0058] The technical solutions in the embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings.

[0059] like Figure 1-7 A drive unit based on an emergency unlocking device includes a motor 1, the output shaft of which extends from its two opposite ends to the outside, one end of which is used to connect to the driven component (such as a train garage door, see below). Figure 1 The other end of the flange 5 is connected to one end of the right output shaft of the clutch 9. The other end of the flange 5 is fixed to the end face of the outer ring 903 of the overrunning clutch 9 (e.g., the other end of the flange 5 is connected to the end face of the outer ring 903 of the bidirectional overrunning clutch 9 through a shaft hole fit and a screw assembly), so that the flange 5 and the outer ring 903 can rotate synchronously.

[0060] like Figure 7 The bidirectional overrunning clutch 9 can be found in patent document CN109630567B. Its outer ring 903 is mounted in the support seat 7 through two support bearings 8. The bidirectional overrunning clutch 9 includes an inner ring 901 and an outer ring 903. A bearing 904 is provided between the inner ring 901 and the outer ring 903. A shift fork 902 is fixed on the inner ring 901. A retaining ring 905 is provided on the inner ring 901. A first shift head 9021 and a second shift head 9022 are provided on the shift fork 902.

[0061] Two micro switch assemblies are symmetrically arranged on the end face of motor 1: left micro switch assembly A2 and right micro switch assembly A27; two micro switch assemblies are symmetrically arranged on end cover 10: left micro switch assembly B11 and right micro switch assembly B29.

[0062] A fixed support 7 is mounted on the motor 1 (e.g., one end of the support 7 is fixed to the end face of the output shaft of the motor 1 by a screw assembly). An end cover 10 is fixed on the support 7 (e.g., the end cover 10 is installed on one end of the support 7 by a shaft hole fit and a screw assembly). A left wire rope fixing support 13 and a right wire rope fixing support 28 are symmetrically arranged on the end cover 10 (by a screw assembly).

[0063] The left wire rope fixing support 13 is used to install the left wire rope assembly 18 via a nut assembly, and the right wire rope fixing support 28 is used to install the right wire rope assembly 19 via a nut assembly. The wire rope ends of the left wire rope assembly 18 and the right wire rope assembly 19 are fixed to (e.g., installed via a shaft hole) the manual cam 12. By pulling the left wire rope assembly 18 and the right wire rope assembly 19, the manual cam 12 can be rotated (e.g., the manual cam 12 is fixedly connected to the connecting shaft 14 via key C16 and retaining ring A15).

[0064] The inner ring 901 of the two-way overrunning clutch 9 is connected to the connecting shaft 14 via key D22 and retaining ring B23. The connecting shaft 14 is fitted with a manual cam 12, which can rotate around the connecting shaft 14.

[0065] Flange 5 is connected to cam 3 via key B6 and retaining ring C24, enabling flange 5 and cam 3 to rotate synchronously.

[0066] The manual cam 12 is fixed to the pin A17 (e.g., pin A17 is fixedly connected to the manual cam 12 by a threaded connection), and the end cover 10 is fixed to the pin B21 (e.g., pin B21 is fixedly connected to the end cover 10 and the support seat 7 by a threaded connection). Pin A17 and pin B21 are connected by a tension spring 20 (e.g., the two ends of the tension spring 20 are connected to pin A17 and pin B21 respectively).

[0067] Ball plungers A25 and B26 are symmetrically arranged and fixed on the support seat 7 (e.g., ball plungers A25 and B26 are symmetrically arranged and fixed on the support seat 7 through threaded engagement and nut assembly).

[0068] Cam 3 works in conjunction with the left micro switch assembly A2 and the right micro switch assembly A27 to determine the circumferential position of cam 3.

[0069] The manual cam 12 works in conjunction with the left micro switch assembly B11 and the right micro switch assembly B29 to determine the circumferential position of the manual cam 12.

[0070] The included angle β of ball plunger A25 and ball plunger B26 around the circumference of support seat 7 is slightly smaller than the included angle θ of the two adjacent shifters of the bidirectional overrunning clutch 9, and is enveloped between the two adjacent shifters.

[0071] Its working principle is as follows:

[0072] There are many types of driven components. For ease of explanation, we will use "train depot door" as an example to illustrate the concept of "driven component".

[0073] S1, Train depot door normally open and closes.

[0074] As attached Figure 8-14 As shown, Figure 8 , Figure 9 These are two state diagrams showing the main drive shaft driving counterclockwise or clockwise, representing the two actions of opening and closing the door.

[0075] When the output shaft of motor 1 drives the main power shaft counterclockwise or clockwise, it drives the connecting flange 5 to rotate synchronously via key B6. The connecting flange 5 then drives the outer ring 903 of cam 3 and bidirectional overrunning clutch 9 to rotate synchronously via key A4 and screw assembly. After cam 3 rotates to the right or left limit position, it triggers the right micro switch assembly A27 or the left micro switch assembly A2, thereby completing the automatic detection of the position.

[0076] At this time, the manual cam 12 remains stationary under the return force of the tension spring 20, and also drives the inner ring 901 and shift fork 902 of the bidirectional overrunning clutch 9 to remain stationary through key C16, connecting shaft 14, and key D22.

[0077] Since the two dials on the shift fork 902 remain stationary and do not encounter any resistance, the outer ring 903 of the bidirectional overrunning clutch 9 is always disengaged relative to the inner ring 901 and the shift fork 902. Therefore, the outer ring 903 of the bidirectional overrunning clutch 9 can rotate freely in both directions relative to the inner ring 901. The end of the motor output shaft connected to the driven component can realize the automatic opening and closing function of the train depot door drive unit through bidirectional automatic rotation, and has an automatic detection function for the door opening and closing position. During the automatic opening and closing process of the train door drive unit, the emergency unlocking device is always in a stationary reset state.

[0078] During this process, the latch works normally and there is no need to manually open or close the door.

[0079] S2, Emergency Manual Unlocking Operation

[0080] As attached Figure 15-19 As shown, when the output shaft of motor 1 acts as the driven shaft (the motor itself has no power), it pulls the wire of the left wire rope assembly 18. The manual cam 12 overcomes the tension of the tension spring 20 and rotates counterclockwise by an angle β to the left manual limit position under the action of the tension F at the end of the wire rope, thus triggering the left micro switch assembly B11 to realize the automatic detection function of the manual left position.

[0081] Simultaneously, the manual cam 12 drives the inner ring 901 and shift fork 902 of the bidirectional overrunning clutch 9 to rotate counterclockwise synchronously via key C16, connecting shaft 14, and key D22. Initially, the outer ring 903 does not rotate. When the second shift head 9022 of the shift fork 902 contacts the ball plunger A25 and is resisted, the inner ring 901, shift fork 902, and outer ring 903 of the bidirectional overrunning clutch 9 engage and rotate counterclockwise by an angle α. The outer ring 903 of the bidirectional overrunning clutch 9 drives the motor output shaft to rotate counterclockwise by an angle α via connecting flange 5 and key B6, completing the counterclockwise unidirectional drive of the motor output shaft by the emergency unlocking device, thereby realizing the emergency manual door opening function of the train depot door drive unit. At the same time, the connecting flange 5 drives the cam 3 to rotate counterclockwise synchronously to the right limit position via key A4, triggering the right micro switch assembly A27 to realize the automatic detection function of the motor output shaft opening position.

[0082] In this way, the emergency unlocking device can manually rotate the motor output shaft counterclockwise by an angle α, and the train depot door can be opened manually.

[0083] S3, Reset of the manual cam after manually opening the door.

[0084] like Figure 20-24 As shown, after the train depot door is manually opened, the motor itself still has no power. The output shaft of motor 1 acts as the driven shaft. At this time, the tension acting on the left wire rope assembly 18 is removed. Under the action of the return tension of the tension spring 20, the manual cam 12 drives the inner ring 901 and shift fork 902 of the bidirectional overrunning clutch 9 to rotate clockwise by angle β to the reset position through the connecting shaft 14, key C16, and key D22. At the same time, the left micro switch assembly B11 is reset. When the bidirectional overrunning clutch 9 rotates from counterclockwise to clockwise, its inner ring 901, shift fork 902 and outer ring 903 are in a disengaged state. At the initial stage of clockwise rotation angle β1, since neither of the two shift heads of the bidirectional overrunning clutch 9 shift fork 902 is subjected to resistance, the inner ring 901, shift fork 902 and outer ring 903 of the bidirectional overrunning clutch 9 always remain in a disengaged state, and the outer ring 903 remains stationary.

[0085] At the final stage of clockwise rotation at angle β2, although the second shifter 9022 of the bidirectional overrunning clutch 9 fork 902 contacts the ball plunger A25 and is resisted by it, keeping the inner ring 901, shifter 902 and outer ring 903 of the bidirectional overrunning clutch 9 briefly engaged, the reset tension of the tension spring 20 is very small and insufficient to overcome the load resistance or friction at the end of the motor to make the motor output shaft rotate clockwise synchronously. Therefore, the emergency unlocking device can be manually activated: the motor output shaft rotates counterclockwise by angle α and after manual reset, the state of the motor output shaft remains unchanged.

[0086] After the manual cam is manually reset, the state of the motor output shaft remains unchanged, and the train depot door remains in the open position.

[0087] By combining the above-mentioned emergency manual door opening operation with the emergency manual reset operation and repeating it multiple times, the emergency unlocking device can realize the function of intermittently driving the output shaft of the motor to rotate continuously in a counterclockwise synchronous manner.

[0088] S4. Emergency manual door closing operation

[0089] As attached Figure 25-29 As shown, when the output shaft of motor 1 is used as the driven shaft, it pulls the wire of the right wire rope assembly 19. The manual cam 12 overcomes the tension of the tension spring 20 and rotates clockwise by an angle β to the right manual limit position under the action of the tension F at the end of the wire rope. Then it triggers the right micro switch assembly B29 to realize the automatic detection function of the manual right position.

[0090] Simultaneously, the manual cam 12 drives the inner ring 901 and shift fork 902 of the bidirectional overrunning clutch 9 to rotate clockwise synchronously via key C16, connecting shaft 14, and key D22. When the first shift head 9021 of the shift fork 902 contacts the ball plunger B26 and is resisted by it, the inner ring 901 and shift fork 902 of the bidirectional overrunning clutch 9 mesh with the outer ring 903 and rotate clockwise by an angle α. The outer ring 903 of the bidirectional overrunning clutch 9 drives the motor output shaft to rotate clockwise by an angle α synchronously via connecting flange 5 and key B6, thus completing the clockwise unidirectional drive of the motor output shaft by the emergency unlocking device, thereby realizing the emergency manual closing function of the train depot door drive unit. At the same time, the connecting flange 5 drives the cam 3 to rotate clockwise synchronously to the left limit position via key A4, triggering the left micro switch assembly A2 to realize the automatic detection function of the motor output shaft closing in place.

[0091] In this way, the emergency unlocking device can manually rotate the motor output shaft counterclockwise by an angle α, so that the train depot door is in the closed state.

[0092] S5. Reset of manual cam after manually closing the door.

[0093] like Figures 30-34As shown, when the output shaft of motor 1 is used as the driven shaft, the tension acting on the right wire rope assembly 19 is removed. Under the action of the return tension of the tension spring 20, the manual cam 12 drives the inner ring 901 and shift fork 902 of the bidirectional overrunning clutch 9 to rotate counterclockwise by angle β to the reset position through the connecting shaft 14, key C16, and key D22. At the same time, the right micro switch assembly B29 is reset. When the bidirectional overrunning clutch 9 rotates from clockwise to counterclockwise, its inner ring 901, shift fork 902 and outer ring 903 are in a disengaged state. At the initial stage of counterclockwise rotation angle β1, since neither of the two shift heads of the bidirectional overrunning clutch 9 shift fork 902 is subjected to resistance, the inner ring 901, shift fork 902 and outer ring 903 of the bidirectional overrunning clutch 9 always remain in a disengaged state.

[0094] At the end of the counterclockwise rotation, the angle β2 is very small. Although the first shifter 9021 of the fork 902 of the bidirectional overrunning clutch 9 is in contact with the ball plunger B26 and is resisted by it, the inner ring 901, the fork 902 and the outer ring 903 of the bidirectional overrunning clutch 9 are always briefly engaged. However, at the end of the counterclockwise rotation, the reset force of the spring 20 is very small and insufficient to overcome the load resistance or friction at the end of the motor to make the motor output shaft rotate clockwise synchronously. Therefore, the emergency unlocking device can be manually implemented: the motor output shaft rotates counterclockwise by an angle α and after manual reset, the state of the motor output shaft remains unchanged.

[0095] In this way, after the manual cam is reset, the state of the motor output shaft remains unchanged, and the train depot door remains closed.

[0096] By combining the above-mentioned emergency manual door closing operation with the emergency manual reset operation and repeating it multiple times, the emergency unlocking device can realize the function of continuously rotating the output shaft of the clockwise reciprocating intermittent drive motor synchronously clockwise.

[0097] Features of this application:

[0098] (1) When the motor output shaft is used as the main power shaft, it does not affect the normal opening and closing of the door.

[0099] (2) When the motor output shaft is used as the driven shaft, the above steps are repeated multiple times. The emergency unlocking device can realize the function of synchronous bidirectional rotation of the motor output shaft by intermittently driving it in both directions. In turn, it can realize the emergency manual switch function of the train depot door drive unit. Through the cooperation of the cam, manual cam and micro switch assembly, the automatic detection function of the motor output shaft rotation angle and manual rotation angle in place can be realized.

[0100] (3) Advantages of the invention The purpose of this invention is to provide a drive unit based on an emergency unlocking device, which can be applied to products such as train garage doors and folding doors. Compared with traditional emergency unlocking devices, it can realize bidirectional intermittent drive function, which can fully meet the needs of emergency manual opening and closing of train garage doors at any position. It has the advantages of simple structure, high reliability, good versatility and low cost, thereby improving the reliability and safety of fully automatic train operation and has a very good engineering application prospect.

Claims

1. A drive unit based on an emergency unlocking device, comprising a motor (1), characterized in that: The output shaft of the motor (1) extends to the outside from its two opposite ends respectively. One end is used to connect to the driven part, and the other end is connected to one end of the flange (5). The other end of the flange (5) is fixed to the end face of the outer ring (903) of the overrunning clutch (9). The outer ring (903) of the two-way overrunning clutch (9) is inside the support seat (7). The two-way overrunning clutch (9) includes an inner ring (901) and an outer ring (903). A bearing (904) is provided between the inner ring (901) and the outer ring (903). A shift fork (902) is fixed on the inner ring (901). A first shift head (9021) and a second shift head (9022) are provided on the shift fork (902). A fixed support (7) is mounted on the motor (1), and a fixed end cover (10) is mounted on the support (7). A left wire rope fixing support (13) and a right wire rope fixing support (28) are symmetrically arranged on the end cover (10). The left wire rope fixing support (13) is provided with a left wire rope assembly (18), and the right wire rope fixing support (28) is provided with a right wire rope assembly (19). Both the left wire rope assembly (18) and the right wire rope assembly (19) have a point fixed on the manual cam (12). The inner ring (901) of the two-way overrunning clutch (9) is fixedly connected to the connecting shaft (14), and the connecting shaft (14) is rotatably connected to the manual cam (12), which can rotate around the connecting shaft (14); The manual cam (12) fixes the pin A (17), and the end cap (10) fixes the pin B (21). The pin A (17) and the pin B (21) are connected by a tension spring (20). Fixed ball plunger A (25) and ball plunger B (26) are symmetrically arranged on the support seat (7); The included angle β of the ball plunger A (25) and ball plunger B (26) around the circumference of the support seat (7) is slightly smaller than the included angle θ of the two adjacent shifters of the two-way overrunning clutch (9), and is enveloped between the two adjacent shifters; The flange (5) is connected to the cam (3) so that the flange (5) and the cam (3) can rotate synchronously; Two micro switch assemblies are symmetrically arranged on the end face of the motor (1): left micro switch assembly A (2) and right micro switch assembly A (27); two micro switch assemblies are symmetrically arranged on the end cover (10): left micro switch assembly B (11) and right micro switch assembly B (29). Cam (3) works with left micro switch assembly A (2) and right micro switch assembly A (27) to determine the circumferential position of cam (3). Manual cam (12) works with left micro switch assembly B (11) and right micro switch assembly B (29) to determine the circumferential position of manual cam (12).

2. The drive unit based on the emergency unlocking device as described in claim 1, characterized in that: The connecting shaft (14) is fitted with a manual cam (12); The wire rope ends of the left wire rope assembly (18) and the right wire rope assembly (19) are fixed on the manual cam (12); One end of the support base (7) is fixed to the end face of the output shaft of the motor (1) by a screw assembly; The other end of the flange (5) is connected to the outer ring (903) end face of the two-way overrunning clutch (9) through a shaft hole fit and screw assembly; The outer ring (903) of the two-way overrunning clutch (9) is mounted in the support seat (7) via two support bearings (8); The manual cam (12) is fixedly connected to the connecting shaft (14) via key C (16) and retaining ring A (15); Pin B (21) is fixedly connected to end cap (10) and support base (7) by threaded connection; The flange (5) is connected to the cam (3) via key B (6) and retaining ring C (24); The end cap (10) is mounted on one end of the support base (7) through a shaft hole fit and screw assembly; Pin A (17) is fixedly connected to manual cam (12) by threaded connection; Ball plunger A (25) and ball plunger B (26) are fixed on the support seat (7) by threaded engagement and symmetrical arrangement of nut assembly; The inner ring (901) of the two-way overrunning clutch (9) is connected to the connecting shaft (14) via key D (22) and retaining ring B (23); The two ends of the tension spring (20) are connected to pin A (17) and pin B (21) respectively.

3. A door opening and closing method based on a drive unit of an emergency unlocking device, characterized in that: Using the drive unit based on the emergency unlocking device as described in claim 1, the output shaft of the motor (1) connected to the driven component is connected to the train depot door, including the following steps S2-S3 or S4-S5: S2, Emergency Manual Unlocking Operation At this time, when the output shaft of the motor (1) is used as the driven shaft, it pulls the wire of the left wire rope assembly (18). The manual cam (12) overcomes the tension of the tension spring (20) and rotates counterclockwise by angle β to the left manual limit position under the action of the tension F at the end of the wire rope, triggering the left micro switch assembly B (11) to realize the automatic detection function of the manual left position. At the same time, the manual cam (12) drives the inner ring (901) and shift fork (902) of the two-way overrunning clutch (9) to rotate counterclockwise synchronously. At the beginning, the outer ring (903) does not rotate. When the second shift head (9022) of the shift fork (902) contacts the ball plunger A (25) and is resisted by it, the inner ring (901), shift fork (902) and outer ring (903) of the two-way overrunning clutch (9) mesh and rotate counterclockwise by an angle α. The outer ring (903) of the two-way overrunning clutch (9) drives the motor output shaft to rotate counterclockwise by an angle α through the connecting flange (5), thus completing the counterclockwise one-way drive of the motor output shaft by the emergency unlocking device, thereby realizing the emergency manual door opening function of the train depot door drive unit. S3, Reset of the manual cam after manually opening the door. After the train depot door is manually opened, the motor itself still has no power. The output shaft of the motor (1) is used as the driven shaft. At this time, the tension acting on the left wire rope assembly (18) is removed. The manual cam (12) drives the inner ring (901) and shift fork (902) of the two-way overrunning clutch (9) to rotate clockwise by angle β to the reset position under the action of the reset tension of the tension spring (20). When the two-way overrunning clutch (9) rotates from counterclockwise to clockwise, its inner ring (901), shift fork (902) and outer ring (903) are in a disengaged state. At the initial stage of clockwise rotation angle β1, since the two shift heads of the shift fork (902) of the two-way overrunning clutch (9) are not subjected to resistance, the inner ring (901), shift fork (902) and outer ring (903) of the two-way overrunning clutch (9) always remain in a disengaged state, and the outer ring (903) remains stationary. At the final stage of clockwise rotation at angle β2, although the second shifter (9022) of the bidirectional overrunning clutch (9) shift fork (902) is in contact with the ball plunger A (25) and is resisted by it, the inner ring (901), shift fork (902) and outer ring (903) of the bidirectional overrunning clutch (9) are always briefly engaged, and the reset tension of the tension spring (20) is very small, which is insufficient to overcome the load resistance or friction at the end of the motor to make the motor output shaft rotate clockwise synchronously. Therefore, the emergency unlocking device can be manually implemented: the motor output shaft rotates counterclockwise by angle α and after manual reset, the state of the motor output shaft remains unchanged, and the train depot door remains open. S4. Emergency manual door closing operation When the output shaft of the motor (1) is used as the driven shaft, it pulls the wire of the right wire rope assembly (19). The manual cam (12) overcomes the tension of the tension spring (20) and rotates clockwise by an angle β to the right manual limit position under the action of the tension F at the end of the wire rope, and then triggers the right micro switch assembly B (29) to realize the automatic detection function of the manual right position. At the same time, the manual cam (12) drives the inner ring (901) and shift fork (902) of the two-way overrunning clutch (9) to rotate clockwise synchronously. When the first shift head (9021) of the shift fork (902) contacts the ball plunger B (26) and is resisted by it, the inner ring (901) and shift fork (902) of the two-way overrunning clutch (9) mesh with the outer ring (903) and rotate clockwise by an angle α. The outer ring (903) of the two-way overrunning clutch (9) drives the motor output shaft to rotate clockwise by an angle α through the flange (5), thus completing the clockwise one-way drive of the motor output shaft by the emergency unlocking device, thereby realizing the emergency manual closing function of the train depot door drive unit. The train depot door is in a closed position. S5. Reset of manual cam after manually closing the door. When the output shaft of the motor (1) is used as the driven shaft, the tension acting on the right wire rope assembly (19) is removed. The manual cam (12) drives the inner ring (901) and shift fork (902) of the two-way overrunning clutch (9) to rotate counterclockwise by angle β to the reset position under the action of the reset tension of the tension spring (20). When the two-way overrunning clutch (9) rotates from clockwise to counterclockwise, its inner ring (901), shift fork (902) and outer ring (903) are in a disengaged state. At the initial stage of counterclockwise rotation angle β1, since the two shift heads of the shift fork (902) of the two-way overrunning clutch (9) are not subjected to resistance, the inner ring (901), shift fork (902) and outer ring (903) of the two-way overrunning clutch (9) always remain in a disengaged state. At the end of the counterclockwise rotation, the angle β2 is very small. Although the first pawl (9021) of the fork (902) of the two-way overrunning clutch (9) is in contact with the ball plunger B (26) and is resisted by it, the inner ring (901), fork (902) and outer ring (903) of the two-way overrunning clutch (9) are always briefly engaged. At the end of the counterclockwise rotation, however, the reset tension of the tension spring (20) is very small and insufficient to overcome the load resistance or friction at the end of the motor to make the motor output shaft rotate clockwise synchronously. Therefore, the emergency unlocking device can be manually implemented: the motor output shaft rotates counterclockwise by an angle α and after manual reset, the state of the motor output shaft remains unchanged and the train depot door remains closed.

Images