CN211342264U

CN211342264U - Locking assembly, locking device, door opening and closing structure and railway vehicle

Info

Publication number: CN211342264U
Application number: CN201921449911.7U
Authority: CN
Inventors: 汤孝东; 李伟伟; 周志榜
Original assignee: BYD Co Ltd; Wuwei BYD Industrial Co Ltd
Current assignee: BYD Co Ltd; Wuwei BYD Industrial Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-08-25
Anticipated expiration: 2029-08-30

Abstract

The utility model relates to a locking technical field of door switching discloses a locking subassembly, locking means, door opening and closing structure and rail vehicle. The locking assembly comprises an intermediate rotating unit and a tail end rotating unit, wherein the intermediate rotating unit comprises a free rotating state used for being disengaged from the locking unit and a non-rotating state used for being engaged and locked with the locking unit; the tail end rotating unit is connected with the middle rotating unit through a one-way rotating unit; in the free rotation state, the tail end rotation unit can drive the middle rotation unit to rotate forwards and backwards through the one-way rotation unit; in the non-rotatable state, the tail end rotating unit can only rotate forwards or backwards through the one-way rotating unit. After the locking assembly is applied to a door opening and closing structure, the door body can be well opened and closed, and stable and reliable door closing and locking of the door body can be ensured.

Description

Locking assembly, locking device, door opening and closing structure and railway vehicle

Technical Field

The utility model relates to a locking technical field of door switching specifically relates to a locking subassembly, a locking means, a door switching structure, and a rail vehicle.

Background

Along with the population of the first-line city, the quasi first-line city and the provincial meeting city is increasing day by day, the ordinary bus can not satisfy people's trip demand well yet, for this reason, each city all develops urban rail vehicles such as subway, tram correspondingly. The doors of the railway vehicle need to be reliably and stably openable and closable.

Generally, a motor drives a screw rod to drive a threaded sleeve unit arranged on the screw rod to move back and forth, and then a door body connected with the threaded sleeve unit is driven to move back and forth to be opened and closed. In addition, the sliding plug door needs to satisfy the requirements of locking and unlocking, and for this reason, an electromagnetic lock is generally used to lock and unlock the screw sleeve unit, so as to meet the requirements of locking the door.

In practical use, the electromagnetic lock needs to be kept in a power-on state to lock the door stably and reliably. However, after the electromagnetic lock breaks down to cause power failure, the door body has the risk of being automatically opened, and thus, a great potential safety hazard exists for the running railway vehicle.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a locking subassembly, this locking subassembly can satisfy the switching of the door body well after using the structure of opening and shutting of door, also can ensure the door body locking of closing door reliably and steadily.

In order to achieve the above object, the present invention provides a locking assembly comprising an intermediate rotating unit and a terminal rotating unit, wherein the intermediate rotating unit comprises a free rotating state for disengaging from the locking unit and a non-rotating state for engaging and locking with the locking unit; the tail end rotating unit is connected with the middle rotating unit through a one-way rotating unit; in the free rotation state, the tail end rotation unit can drive the middle rotation unit to rotate forwards and backwards through the one-way rotation unit; in the non-rotatable state, the tail end rotating unit can only rotate forwards or backwards through the one-way rotating unit.

Through above-mentioned technical scheme, because terminal rotation unit passes through the unidirectional rotation unit and is connected with middle rotation unit to middle rotation unit can break away from the unblock with the locking unit in order to be in the free rotation state and joint locking in order to be in unable rotation state, and at the free rotation state, terminal rotation unit can drive middle rotation unit through the unidirectional rotation unit and just reverse, and at unable rotation state, terminal rotation unit can only just rotate forward or reverse through the unidirectional rotation unit. Therefore, when the locking assembly is applied to a door opening and closing structure, the tail end rotating unit is connected with the door body driving mechanism, so that the middle rotating unit can rotate freely when the locking unit unlocks the middle rotating unit, the door body driving mechanism can drive the middle rotating unit to rotate freely through the tail end rotating unit and the one-way rotating unit, and meanwhile, the door body driving mechanism can drive the door body to move, open and close; and when the locking unit locks the middle rotating unit, the middle rotating unit cannot rotate, and at the moment, the unidirectional rotating unit only allows unidirectional rotation, so that the door body driving mechanism only can drive the tail end rotating unit to rotate in a unidirectional mode, and the door body driving mechanism only can drive the door body to move and close. For example, after the door driving mechanism can only drive the door to move and close and trigger the trigger switch, the locking unit locks the middle rotating unit, at the moment, under the limitation that the unidirectional rotating unit only allows unidirectional rotation, the door cannot be driven to move reversely to be opened, and the door can only be further moved and closed and can be stably and reliably locked after being closed in place. For example, in a state where the locking unit locks the intermediate rotating unit, the door body cannot move in the reverse direction to be further opened at any position in the moving and closing process, and can only move further to be further closed, and is stably and reliably locked after being closed in place. Thus, after the locking assembly is applied to a door opening and closing structure, the door body can be well opened and closed, and stable and reliable door closing and locking of the door body can be ensured.

Further, the unidirectional rotation unit is a unidirectional bearing.

Furthermore, the intermediate rotating unit comprises an axial accommodating cavity, and the one-way bearing is arranged in the axial accommodating cavity; the tail end rotating unit is matched with an inner ring of the one-way bearing.

Furthermore, the tail end rotating unit comprises a rotating sleeve, the rotating sleeve comprises an inner cavity used for arranging a tail end rotating shaft, and the rotating sleeve is arranged in an inner ring of the one-way bearing;

and/or the presence of a gas in the gas,

the tail end rotating unit comprises a tail end rotating shaft, and one end of the tail end rotating shaft is arranged in an inner ring of the one-way bearing.

For example, in one embodiment, the intermediate rotating unit includes an axial accommodating cavity, the unidirectional rotating unit is a unidirectional bearing, the unidirectional bearing is disposed in the axial accommodating cavity, the terminal rotating unit includes a terminal rotating shaft, and one end of the terminal rotating shaft is accommodated in an inner ring of the unidirectional bearing.

In addition, the middle rotating unit comprises a first rotating body and a second rotating body which are connected, and the second rotating body and the first rotating body can be adjusted in a relatively radial swinging mode; wherein the first rotating body is connected with the terminal rotating unit through the one-way rotating unit, and the second rotating body is formed with a second locking member for disengaging and engaging with the locking unit.

Furthermore, the first rotating body is provided with an axial convex column, the second rotating body is provided with an axial space, the axial convex column extends into the axial space, grooves are respectively formed in the positions, corresponding to each other, of the outer peripheral surface of the axial convex column and the inner surface of the axial space, and limiting beads are arranged in the grooves.

Further, the second rotating body is formed with a mounting shaft section for rotatably fitting on a mounting base, the intermediate rotating unit includes a housing provided on the first rotating body and radially swingably adjustable, and one end of the second rotating body is disposed between an inner surface of the housing and an outer surface of the first rotating body and fixedly connected to the housing.

In addition, the utility model provides a locking device, this locking device includes locking unit and the above-mentioned locking subassembly of arbitrary; wherein the intermediate rotating unit is rotatably provided on the locking unit; the locking unit can disengage to unlock the intermediate rotating unit so that the intermediate rotating unit is in the free rotation state; the locking unit is capable of engagement-locking the intermediate rotating unit so that the intermediate rotating unit is in the non-rotatable state.

When the locking device is applied to the door opening and closing structure, the tail end rotating unit is connected with the door body driving mechanism, and the locking device can well meet the opening and closing requirements of the door body and can ensure the stable and reliable door closing and locking of the door body.

Further, the locking unit is an electromagnetic locking unit, and the electromagnetic locking unit comprises a first locking piece; the intermediate rotating unit includes a second locking member; when the electromagnetic locking unit is electrified, the first locking piece and the second locking piece are separated to unlock; when the electromagnetic locking unit is powered off, the first locking piece and the second locking piece are engaged to lock.

In addition, the locking device includes a manual unlocking unit capable of unlocking the locking unit and the intermediate rotating unit.

Further, the manual unlocking unit includes a handle rotatably provided on the locking unit, the handle being rotatable to unlock the locking unit and the intermediate rotating unit.

In addition, the utility model provides a door opening and closing structure, including the door body, door body actuating mechanism and above arbitrary locking means, wherein, the end rotates the unit and is connected with the door body actuating mechanism, wherein, in the free rotation state, the door body actuating mechanism can drive the door body removes to open and close; in the non-rotating state, the door body driving mechanism can only drive the door body to move and close. Thus, as described above, the door body can be normally opened and closed, and stable and reliable closing lock can be ensured.

Furthermore, the utility model provides a rail vehicle, rail vehicle is provided with above the door opening and closing structure. In this way, as mentioned above, the safety and overall quality of the rail vehicle are significantly improved.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a locking device according to an embodiment of the present invention, showing a locking assembly according to an embodiment of the present invention;

FIG. 2 is another cross-sectional structural schematic view of the locking assembly shown in FIG. 1;

fig. 3 is a partial perspective view of a locking assembly according to an embodiment of the present invention;

fig. 4 is a schematic end view of the locking device of fig. 1.

Description of the reference numerals

1-one-way bearing, 2-rotating sleeve, 3-end rotating shaft, 4-first rotating body, 5-second rotating body, 6-second locking piece, 7-axial convex column, 8-axial space, 9-limiting bead, 10-shell, 11-first locking piece, 12-electromagnetic locking unit, 13-handle, 14-installation shaft section, 15-headless top thread, 16-spring, 17-spacer bush, 18-installation bearing, 19-spacer and 20-electromagnetic locking unit shell.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

Fig. 1 shows a specific structure of the locking assembly and the locking device provided by the present invention, but it should be understood that the present invention is not limited to the structure shown in fig. 1, and the locking assembly and the locking device may have other deformation bodies, and these deformation bodies all belong to the scope of the present invention.

Referring to the structure shown in fig. 1, the locking assembly provided by the present invention comprises a middle rotating unit and a terminal rotating unit, wherein the middle rotating unit comprises a free rotating state for disengaging from the locking unit and an unrotatable state for engaging with the locking unit and locking, and the terminal rotating unit is connected with the middle rotating unit through a unidirectional rotating unit, wherein in the free rotating state, the terminal rotating unit can drive the middle rotating unit to rotate forward and backward through the unidirectional rotating unit; in the non-rotatable state, the tail end rotating unit can only rotate forwards or backwards through the unidirectional rotating unit. That is, the utility model discloses an among the locking subassembly, terminal rotation unit and middle rotation unit are through the one-way rotation unit connection, under the prerequisite of this kind of connection, just can be at the free rotation state, and terminal rotation unit can rotate the unit just reversal in the middle of driving through the one-way rotation unit to at unable rotation state, terminal rotation unit can only corotation or reversal through the one-way rotation unit. In other words, the end rotary unit and the intermediate rotary unit are always connected without being disengaged and engaged during use.

It should be understood that, in the locking subassembly of the utility model, the unidirectional rotation unit can have multiple structural style, but no matter which kind of structural style is adopted, it as long as can rotate unit and middle rotation unit connection with terminal to when the state of rotation unit in the middle of the locking unit unblock, it can rotate the unit just reversal in the middle of can driving through the unidirectional rotation unit to satisfy terminal rotation unit, and when the state of rotation unit in the middle of the locking unit locking, it can only corotation or the function of reversal to satisfy terminal rotation unit.

For example, in one form of the unidirectional rotation unit, the unidirectional rotation unit includes a pawl and a plurality of ratchet teeth arranged at intervals in a circumferential direction and extending obliquely in the same circumferential direction, for example, the ratchet teeth arranged at intervals in a circumferential direction of the ratchet wheel are formed on a circumferential surface of the ratchet wheel, wherein the pawl is formed on one of the terminal rotation unit and the intermediate rotation unit, and the plurality of ratchet teeth are formed on the other of the terminal rotation unit and the intermediate rotation unit, so that in a state where the locking unit unlocks the intermediate rotation unit, since the intermediate rotation unit is freely rotatable, at this time, the terminal rotation unit can drive the intermediate rotation unit to rotate forward and backward by the pawl and the ratchet teeth engaged to realize opening and closing movements of the door body, and in a state where the locking unit locks the intermediate rotation unit, the intermediate rotation unit cannot rotate, due to unidirectional restriction of the pawl, the unable antiport of pawl can only be under the turning force effect along the slope extending direction unidirectional rotation of ratchet (of course, the cooperation relation of ratchet and pawl satisfies that the pawl can not deviate from the ratchet when middle rotation unit can the free rotation, the pawl can deviate from and enter into next ratchet along the extending direction of ratchet under the turning force effect when middle rotation unit is locked unable to rotate, analogize in proper order), make terminal rotation unit can only unidirectional rotation, make the door body can only move and close, and unable reverse movement opens.

For another example, in another structure form of the unidirectional rotation unit, as shown in fig. 1, the unidirectional rotation unit is a unidirectional bearing 1. One-way bearing 1 can be convenient clamping between terminal rotation unit and middle rotation unit, like this, the state of rotation unit in the middle of the locking unit unblock, because middle rotation unit can the free rotation, at this moment, terminal rotation unit can drive middle rotation unit positive and negative rotation through one-way bearing 1, in order to realize opening of the door body and move with closing the removal, and the state of rotation unit in the middle of the locking unit locking, middle rotation unit just can not rotate, because one-way bearing only allows one-way rotation, make terminal rotation unit can only one-way rotation, make the door body can only move and close, and unable reverse movement opens.

Of course, the unidirectional rotation unit can also have other structural forms, and the present invention is not listed here any more, but it should be emphasized that the unidirectional rotation unit of other structural forms also falls within the scope of the locking device of the present invention.

In addition, the terminal rotating unit and the intermediate rotating unit can be always connected through the unidirectional rotating unit in a plurality of ways, for example, in one way, an axial space is formed on one of the terminal rotating unit and the intermediate rotating unit, an axial shaft section is formed on the other of the terminal rotating unit and the intermediate rotating unit, and the axial shaft section is arranged in the axial space through the unidirectional rotating unit. Or, in another mode, the unidirectional rotation unit comprises a shell and a rotating body and a base body which are axially arranged in the shell, wherein the end faces of the rotating body and the base body, which are opposite to each other, are provided with the ratchet teeth and the pawl, the tail end rotation unit is axially connected to the rotating body, and the middle rotation unit is axially connected to the base body.

In addition, the one-way bearing 1 may have various assembly structures, which need to be determined according to the specific structural type of the one-way bearing 1, the structures of the end rotating unit and the intermediate rotating unit. For example, the first and second rings of the one-way bearing 1 may be arranged in the axial direction so that the first ring may be coupled to the end surface of the end rotary unit and the second ring may be coupled to the end surface of the intermediate rotary unit.

Or, the inner ring and the outer ring of the one-way bearing 1 are arranged in the radial direction, so that, as shown in fig. 1 and 2, the intermediate rotating unit includes an axial accommodating chamber, the one-way bearing 1 is disposed in the axial accommodating chamber, that is, the outer surface of the outer ring of the one-way bearing 1 is fitted with the inner peripheral surface of the axial accommodating chamber, and the terminal rotating unit is fitted with the inner ring of the one-way bearing 1, so that the inner space of the intermediate rotating unit can be fully utilized to accommodate one ends of the one-way bearing 1 and the terminal rotating unit, thereby reducing the axial size of the locking assembly and making the locking assembly more compact in structure.

In addition, as shown in fig. 1, after the one-way bearing 1 is arranged in the axial accommodating cavity, a spacer 19 is arranged on the end surface of the axial accommodating cavity, and a hole for a shaft to pass through is formed on the spacer 19, so that the spacer can prevent dust from entering the one-way bearing 1 in the operation process to pollute the one-way bearing 1 and influence the stable and reliable operation of the one-way bearing 1.

Of course, the end rotating unit may have various forms, for example, the end rotating unit includes a rotary sleeve 2, the rotary sleeve 2 includes an inner cavity for disposing an end rotating shaft 3, the rotary sleeve 2 is disposed in an inner ring of the one-way bearing 1; or, the terminal rotating unit includes a terminal rotating shaft 3, and one end of the terminal rotating shaft 3 is disposed in the inner ring of the one-way bearing 1, that is, one end of the terminal rotating shaft 3 is directly fitted in the inner ring of the one-way bearing 1; or, the tail end rotating unit comprises a rotating sleeve 2 and a tail end rotating shaft 3, the rotating sleeve 2 is arranged in an inner ring of the one-way bearing 1, and one end of the tail end rotating shaft 3 is inserted and matched in an inner cavity of the rotating sleeve 2.

In addition, the tail end rotating shaft 3 can be a shaft body provided with a gear and is connected with an output shaft of the motor through a coupler, and the gear can be meshed with a rack on the door body; or, the tail end rotating shaft 3 is a screw rod, the screw rod can be connected with an output shaft of the motor and is matched with a nut arranged on the door body, and therefore, the screw rod rotates to drive the nut to move in a reciprocating mode, and the door body is driven to move in a reciprocating mode to be opened and closed.

For example, in one embodiment, as shown in fig. 1, the intermediate rotating unit includes an axial accommodating cavity, the unidirectional rotating unit is a unidirectional bearing 1, the unidirectional bearing 1 is disposed in the axial accommodating cavity, the terminal rotating unit includes a terminal rotating shaft 3, and one end of the terminal rotating shaft 3 is accommodated in an inner ring of the unidirectional bearing 1.

In addition, in the locking assembly of the present invention, as shown in fig. 1 and fig. 2, the intermediate rotating unit includes a first rotating body 4 and a second rotating body 5 connected, and the second rotating body 5 and the first rotating body 4 can be adjusted to radially swing relatively; wherein the first rotating body 4 is connected to the terminal rotating unit through a unidirectional rotating unit, and the second rotating body 5 is formed with a second locking member 6, the second locking member 6 being for disengagement and engagement with the locking unit. Specifically, the first rotor 4 has the above-described axial accommodation chamber formed therein. In this way, since the second rotor 5 can be adjusted radially in a swinging manner with respect to the first rotor 4, it is possible to compensate for the radial errors of the locking assembly that exist in actual use.

Of course, the intermediate rotating unit may have various configurations, but any configuration may be adopted as long as it has a function of radial oscillation adjustment.

For example, as shown in fig. 1, 2 and 3, in one structure, the first rotating body 4 is formed with an axial convex column 7, the second rotating body 5 is formed with an axial space 8, the axial convex column 7 extends into the axial space 8, the outer circumferential surface of the axial convex column 7 and the inner surface of the axial space 8 are respectively formed with a groove at the corresponding position, and a limiting bead 9 is arranged in the groove, so that the second rotating body 5 and the first rotating body 4 can radially swing to adjust the radial error by the matching of the limiting bead 9 and the groove, and simultaneously, the first rotating body 4 and the second rotating body 5 can synchronously rotate.

For another example, in another structure, the first rotating body 4 is formed with an axial boss 7, the second rotating body 5 is formed with an axial space 8, a key is formed on the outer circumferential surface of the axial boss 7, a key groove is formed on the inner circumferential surface of the axial space 8, the axial boss 7 extends into the axial space 8, so that the key is located in the key groove, and a radial gap is formed between the outer circumferential surface of the key and the groove bottom surface of the key groove. In this way, the radial error can be adjusted by the radial oscillation between the second rotating body 5 and the first rotating body 4 by the key and the key groove, and the first rotating body 4 and the second rotating body 5 can be rotated synchronously.

In addition, as shown in fig. 1 and 2, the second rotating body 5 is formed with a mounting shaft section 14 for rotatably fitting on a mounting base, so that the intermediate rotating unit can be rotatably provided on the mounting base such as a lock unit described later by means of the mounting shaft section 14.

As shown in fig. 1 and 2, the intermediate rotating unit includes a housing 10, the housing 10 is disposed on the first rotating body 4 and can be adjusted to swing radially, one end of the second rotating body 5 is disposed between the inner surface of the housing 10 and the outer surface of the first rotating body 4 in the radial direction and is fixedly connected with the housing 10 to further prevent the axial play between the second rotating body 5 and the first rotating body 4, for example, as shown in fig. 2, the housing 10 is an annular housing, the space wall of the axial space 8 is inserted into the annular space between the annular housing and the axial boss 7, and a connecting member such as a screw or a headless top thread 15 connects the annular housing and the space wall of the axial space 8.

In addition, the utility model provides a locking device, this locking device includes locking unit and the locking subassembly of above arbitrary, wherein, the middle rotating unit can set up on the locking unit rotatably; the locking unit can be disengaged from the unlocking intermediate rotating unit so that the intermediate rotating unit is in a free rotating state; the locking unit is capable of engagement-locking the intermediate rotating unit so that the intermediate rotating unit is in a non-rotatable state.

The intermediate rotating unit may be rotatably provided on the locking unit in various ways. For example, the housing of the locking unit may comprise an axially extending cylinder portion in which the mounting shaft section 14 of the intermediate rotary unit may be arranged by means of bearings.

Alternatively, as shown in fig. 1, the mounting shaft section 14 of the intermediate rotary unit is disposed in the central hole of the locking unit, for example, the mounting bearing 18, such as a deep groove ball bearing, is interference-mounted in the inner ring of the electromagnet housing of the electromagnetic locking unit, and is axially fixed by an axial retainer ring through a hole radially extending into the inner ring of the electromagnet housing, so that another deep groove ball bearing can be accurately press-fitted in place, a spacer 17 fitted over the mounting shaft section 14 is disposed between the two mounting bearings 18, so that the mounting shaft section 14 is rotatably disposed in the inner ring of the electromagnet housing through the mounting bearing 18, and thus, the intermediate rotary unit can rotate with this as a supporting rotation point.

The utility model discloses an among the locking means, the locking unit can be for having the mechanical locking unit of locking lever, and the locking lever can stretch into in the lockhole of middle rotating unit with the locking, perhaps retracts in order to unblock from the lockhole.

Or, the locking unit is an electromagnetic locking unit 12, the electromagnetic locking unit 12 includes a first locking member 11, and the intermediate rotating unit includes a second locking member 6, for example, the second locking member 6 is formed on the second rotating body 5, wherein when the electromagnetic locking unit 12 is energized, the electromagnetic force will drive the first locking member 11 away from the second locking member 6, so that the first locking member 11 and the second locking member 6 are disengaged to unlock, and at the same time, one or more elastic members, such as a spring 16, connected to the first locking member 11 store energy, for example, compressed or stretched; when the electromagnetic locking unit 12 is de-energized, the first locking member 11 moves toward the second locking member 6 under the releasing action of the elastic member and engages with the second locking member 6 to be locked.

The first locking member 11 and the second locking member 6 may be friction disks that frictionally lock when engaged or unlock when moved away from each other, or the first locking member 11 and the second locking member 6 may be teeth that can engage and disengage as shown in fig. 4.

Additionally, the utility model discloses an among the locking means, locking means includes manual unblock unit, and manual unblock unit can rotate the unit unblock with the centre with the locking unit. That is, when the locking unit is locked with the intermediate rotating unit, the door body cannot be automatically opened. However, the manual unlocking unit may be operated to disengage the locking unit from the intermediate rotating unit, such as the first locking member 11 and the second locking member 6, to unlock, and at this time, the end rotating shaft 3, such as the lead screw, may be rotated forward and backward to open the door body.

Of course, the manual unlocking unit may have various structures, for example, the manual unlocking unit may include a push handle, and the push handle may be coupled with the first locking member 11 or the second locking member 6 to disengage the first locking member 11 and the second locking member 6 to disengage the locking unit and the intermediate rotating unit.

Alternatively, as shown in fig. 1, the manual unlocking unit includes a handle 13 rotatably disposed on the locking unit, such as shown in fig. 1, the handle 13 is rotatably disposed on the electromagnetic locking unit housing 20 through a support shaft, the handle 13 can be rotated to unlock the locking unit and the intermediate rotating unit, for example, when the handle 13 is rotated, an outward-flaring cam profile of the front end of the handle 13 gradually presses the first locking member 11, so that the first locking member 11 is disengaged from the second locking member 6 to unlock, and the spring 16 of the electromagnetic locking unit is compressed to store energy.

In addition, the utility model provides a door opening and closing structure, this door opening and closing structure can be the door opening and closing structure of any required occasion, wherein, door opening and closing structure includes the door body, door body actuating mechanism and above arbitrary locking means, wherein, terminal rotation unit with the door body actuating mechanism is connected, wherein, in free rotation state, door body actuating mechanism can drive the door body removes and opens and close; in the non-rotating state, the door body driving mechanism can only drive the door body to move and close. Thus, as described above, the door body can be normally opened and closed, and stable and reliable closing lock can be ensured.

Furthermore, the utility model provides a rail vehicle, for example subway or tram, rail vehicle is provided with above the door opening and closing structure to form rail vehicle's sliding plug door. In this way, as mentioned above, the safety and overall quality of the rail vehicle are significantly improved.

For example: when the sliding plug door is opened, the electromagnetic locking unit is electrified, the first locking piece 11 such as an armature overcomes the elastic force of the spring 16 under the suction force of the electromagnet and is separated from the second locking piece 6, and the screw rod drives the door body to move under the driving of the motor to complete the door opening instruction;

when the sliding plug door is closed, the electromagnetic locking unit is electrified, the armature iron overcomes the elastic force of the spring under the suction force of the electromagnet and is separated from the second locking piece 6, and the lead screw drives the door body to move under the driving of the motor to complete a door closing instruction;

when the electromagnetic locking unit is powered off, the armature is connected and locked with the second locking piece 6 under the action of the elastic force of the spring, so that the lead screw can only perform unidirectional rotation for closing the door and can not rotate reversely for opening the door, and the door can not be opened at the moment;

when the handle 13 is turned, the handle 13 turns on the electromagnetic locking unit housing and drives the armature away and away from the second locking member 6, at which point the electromagnetic locking unit is manually unlocked and the door can be freely opened and closed.

That is, when the power is cut off, the door can only be closed and can not be automatically opened under the action of the one-way bearing, so that the life safety of passengers is ensured.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims

1. A latch assembly, comprising:

an intermediate rotating unit including a freely rotating state for disengaging unlocking from the locking unit and a non-rotating state for engaging locking with the locking unit;

the tail end rotating unit is connected with the middle rotating unit through a one-way rotating unit;

wherein the content of the first and second substances,

in the free rotation state, the tail end rotation unit can drive the middle rotation unit to rotate forwards and backwards through the one-way rotation unit;

in the non-rotatable state, the tail end rotating unit can only rotate forwards or backwards through the one-way rotating unit.

2. The locking assembly according to claim 1, characterized in that said intermediate rotation unit comprises a first rotation body (4) and a second rotation body (5) coupled, said second rotation body (5) and said first rotation body (4) being adjustable with respect to each other in a radial oscillation;

wherein the first rotating body (4) is connected with the tail end rotating unit through the one-way rotating unit, and a second locking piece (6) is formed on the second rotating body (5), and the second locking piece (6) is used for being disengaged and engaged with the locking unit.

3. A locking assembly according to claim 2, wherein the first rotor (4) is formed with an axial projection (7), the second rotor (5) is formed with an axial space (8), the axial projection (7) extends into the axial space (8), grooves are formed at the positions corresponding to each other on the outer circumferential surface of the axial projection (7) and the inner surface of the axial space (8), and a limiting bead (9) is arranged in each groove.

4. The locking assembly according to claim 2, characterized in that the second rotor (5) is formed with a mounting shaft section (14) for rotatably fitting on a mounting base;

the intermediate rotating unit comprises a shell (10), the shell (10) is arranged on the first rotating body (4) and can be adjusted in a radial swinging mode, one end of the second rotating body (5) is arranged between the inner surface of the shell (10) and the outer surface of the first rotating body (4) and is fixedly connected with the shell (10).

5. The lock assembly according to any one of claims 1 to 4, wherein the intermediate rotating unit comprises an axial receiving cavity, the unidirectional rotating unit is a unidirectional bearing (1), the unidirectional bearing (1) is arranged in the axial receiving cavity, the terminal rotating unit comprises a terminal rotating shaft (3), and one end of the terminal rotating shaft (3) is received in an inner ring of the unidirectional bearing (1).

6. A locking device, comprising:

a locking unit;

the locking assembly of any one of claims 1-5;

wherein the content of the first and second substances,

the intermediate rotating unit is rotatably provided on the locking unit;

the locking unit can disengage to unlock the intermediate rotating unit so that the intermediate rotating unit is in the free rotation state;

the locking unit is capable of engagement-locking the intermediate rotating unit so that the intermediate rotating unit is in the non-rotatable state.

7. The locking arrangement according to claim 6, characterized in that the locking unit is an electromagnetic locking unit (12), the electromagnetic locking unit (12) comprising a first locking member (11);

the intermediate rotation unit comprises a second locking member (6);

wherein the content of the first and second substances,

when the electromagnetic locking unit (12) is electrified, the first locking piece (11) and the second locking piece (6) are disengaged to unlock;

when the electromagnetic locking unit (12) is powered off, the first locking piece (11) and the second locking piece (6) are engaged to lock.

8. The locking device according to claim 6 or 7, characterized in that it comprises a manual unlocking unit able to unlock the locking unit from the intermediate rotating unit.

9. A door opening and closing structure comprising a door body, a door body driving mechanism, and the locking device according to any one of claims 6 to 8, wherein the terminal rotating unit is connected to the door body driving mechanism;

wherein the content of the first and second substances,

in the free rotation state, the door body driving mechanism can drive the door body to move, open and close;

in the non-rotating state, the door body driving mechanism can only drive the door body to move and close.

10. A railway vehicle, characterized in that the railway vehicle is provided with the door opening and closing structure of claim 9.