CN211008149U - Power system for door leaf and car - Google Patents

Abstract

The utility model relates to a driving system and car for door leaf, driving system includes screw rod, nut assembly, first guide rail and door carrying frame, wherein, the screw rod is provided with the external screw thread, the nut assembly is provided with the internal thread that matches with the external screw thread, and nut assembly and screw rod constitute the sliding pair; the door carrying frame is movably connected with the first guide rail, one end of the door carrying frame is hinged to the nut assembly, the other end of the door carrying frame is used for connecting a door leaf, and the first guide rail is used for guiding and/or supporting the door carrying frame when the nut assembly drives the door carrying frame to move; the utility model provides a driving system, compact structure, occupation space is little, and the driving system of the installation of being convenient for not only can drive door leaf even running, for the door leaf provides accurate direction etc. adopts screw drive mechanism to carry out the transmission moreover, and the transmission is steady, the response is fast, is particularly useful for the suspension type car.

Description

Power system for door leaf and car

Technical Field

The utility model relates to an automatically-controlled door technical field, concretely relates to a driving system and car for door leaf.

Background

At present, a door mechanism capable of realizing automatic opening/closing is more and more widely applied in life; the door mechanism generally includes a door leaf, a driving device, a door carrying frame and a guide rail, the door leaf is connected with the driving device through the door carrying frame, and the driving device drives the door leaf to move along the guide rail through the door carrying frame, so as to realize the opening and closing of the door leaf.

However, in the door mechanism in the prior art, the door leaf is usually directly driven by a motor to open and close the door leaf, and this way, there are usually: the motor is inconvenient to arrange, easy to damage, unstable in door leaf operation and the like, in the prior art, a transmission mechanism is adopted to transmit the power of the motor to drive a power system of the door leaf, and the transmission mechanism usually adopts a link mechanism, so that the problem of unstable transmission is solved, and the transmission mechanism can be generally suitable for the existing rail cars, such as subways, motor cars and the like, but is not suitable for a suspended car; in addition, the conventional power system is usually large in size and not compact enough in structure, so that the conventional power system is inconvenient to install and occupies a large space of a car.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at of type improves the not enough that exists among the prior art, provides a compact structure, and occupation space is little, and the driving system of the installation of being convenient for not only can drive door leaf even running, for the door leaf provides accurate direction etc. adopts screw drive mechanism to transmit moreover, and the transmission is steady, the response is fast, is particularly useful for the suspension type car.

The technical scheme adopted by the utility model is as follows:

a power system for a door leaf comprises a screw, a nut assembly, a first guide rail and a door carrying frame, wherein the screw is provided with an external thread, the nut assembly is provided with an internal thread matched with the external thread, and the nut assembly and the screw form a sliding pair; the door carrying frame and the first guide rail are movably connected, one end of the door carrying frame is hinged to the nut assembly, the other end of the door carrying frame is used for being connected with a door leaf, and the first guide rail is used for guiding and/or supporting the door carrying frame. In the scheme, the spiral transmission mechanism is adopted for transmission, so that the transmission is stable, the response is fast, and the door leaf can be opened/closed quickly, so that the efficiency is improved; an independent guide rail is arranged at the door carrying frame, so that accurate guide can be provided for opening/closing of the door leaf; in addition, the nut assembly, the first guide rail and the door leaf are combined together by adopting the door carrying frame, so that the power system is more compact in structure, small in occupied space and convenient to install, and is favorable for driving the door leaf to run stably.

Preferably, the first guide rail is a straight guide rail, or the first guide rail is provided with a curved portion. When the first guide rail is a straight guide rail, the first guide rail is used for guiding the door carrying frame to move along a straight line, and at the moment, the door leaf always moves along the straight line in the opening/closing process of the door leaf; when the first guide rail is provided with the bending part, the bending part is used for changing the direction of the first guide rail, so that the running track of the first guide rail is not completely linear, and the moving direction of the door leaf can be changed in the opening/closing process of the door leaf, thereby being beneficial to the door leaf to move to the outer side of the lift car in the opening process.

Furthermore, the first guide rail comprises a first straight line section, an arc-shaped section and a second straight line section, two ends of the arc-shaped section are respectively connected with the first straight line section and the second straight line section, the first straight line section is parallel to the screw rod, and the arc-shaped section is bent towards the screw rod. During assembly, the first straight line segment of the first guide rail is parallel to the screw rod, and the arc-shaped segment is bent towards the direction of the screw rod (namely, bent towards the inner part of the car), so that the door leaf can move to the outer side of the car under the guiding action of the first guide rail in the process of opening the door leaf.

Preferably, the door carrying frame is provided with a first connecting part for connecting the nut assembly and a second connecting part matched with the first guide rail.

Further, the first connecting portion is a hinge hole or a hinge post. Through setting up hinge hole or hinge post, can be convenient form articulated with the nut assembly for at the in-process that removes, the door carrying frame can rotate and/or remove for the nut assembly.

In a further scheme, the hinge holes are strip-shaped holes, and the length directions of the strip-shaped holes are perpendicular to the length directions of the screws. The strip-shaped holes are adopted, so that the door carrying frame can rotate relative to the nut assembly and can move relative to the nut assembly in the process that the nut assembly moves along the screw rod; thereby make the door carrying frame not only can move along the length direction of screw under the drive of nut assembly, can move along the direction of perpendicular to screw length direction under the restraint of first guide rail moreover to can synthetic curvilinear motion, more be favorable to opening and closing of door leaf.

Preferably, the second connecting portion is a guide wheel, a cam bearing or a protruding portion arranged on the door carrying frame, or the second connecting portion and the first guide rail form a guide rail pair. The second connecting part has various structures, can adopt a guide wheel, a cam bearing or be arranged on a convex part of the door carrying frame and the like, can be inserted into the first guide rail, and can slide and roll along the first guide rail in the moving process of the door carrying frame, thereby realizing the guiding function; furthermore, the second connecting portion may also form a rail pair with said first rail, so that the portal frame may be moved along a predetermined path under the constraint of the rail pair.

Preferably, the nut assembly is provided with a third connecting part matched with the first connecting part, and the first connecting part and the third connecting part are hinged. Therefore, the nut assembly is hinged with the door carrying frame so as to facilitate transmission.

Furthermore, the third connecting part is a transmission rod, a transmission shaft, a pin shaft, a bolt or a screw. So as to form an articulation with the portal.

In a further scheme, the nut assembly further comprises a second guide rail, the second guide rail is parallel to the screw and arranged on one side of the screw, the nut assembly is provided with a fourth connecting portion, the nut assembly is movably connected with the second guide rail through the fourth connecting portion, and the second guide rail prevents the nut assembly from rotating by restraining the fourth connecting portion. In this scheme, fourth connecting portion and second guide rail structure looks adaptation, at the removal in-process of nut assembly, fourth connecting portion can be followed second guide rail and constructed the removal, and second guide rail constructs and can provide the restraint for fourth connecting portion, both can effectively prevent nut assembly rotation, can be again at the removal in-process of nut assembly, the atress on the balanced nut assembly, for example, can effectively balance the moment etc. that the gravity of door leaf produced in nut assembly department.

The fourth connecting portion has various structures, and in a preferred embodiment, the fourth connecting portion may be a limiting rod, a limiting block, a cam bearing, or a balance wheel connected by a shaft, or the fourth connecting portion and the second guide rail form a guide rail pair. By adopting the fourth connecting part with the structure, after the assembly is finished, one end of the fourth connecting part is positioned in the second guide rail, so that the fourth connecting part can move or roll along the second guide rail in the moving process of the nut assembly, and the nut is effectively prevented from rotating.

In a preferred embodiment, the first rail and/or the second rail has a U-shaped cross section.

The mounting box comprises a mounting groove and a detachable cover plate, the mounting groove is formed by surrounding a bottom plate and three side plates, the screw rod is fixed in the mounting groove through a bearing seat, the first guide rail is mounted on one side, not provided with the side plates, of the mounting groove and is parallel to the screw rod, the second guide rail is fixed on one side plate and is parallel to the screw rod, the door carrying frame extends out through one side, not provided with the side plates, of the mounting groove, and the cover plate is used for sealing the upper portion of the mounting box. The setting of install bin is favorable to this driving system's integration and modularization, the integral erection in the car of being more convenient for.

In a further scheme, the device further comprises a driving motor and a transmission part, wherein two ends of the transmission part are respectively connected with the driving motor and the screw rod for transmission. The driving motor is used for providing power for opening/closing the door leaf.

Preferably, the transmission part is a universal joint or a transmission shaft.

For realizing two divisions of doors, in a first scheme, including two nut assemblies, two first guide rails and two door carrying frames, set up two sections external screw threads on the screw rod, the soon of two sections external screw threads is opposite, the one end of screw rod with the transmission portion links to each other, two nuts set up respectively in two sections external screw thread departments, two door carrying frame's one end articulate respectively in two nut assemblies, the other end are used for connecting two door leafs respectively, two first guide rails symmetrical arrangement to constitute swing joint with two door carrying frames respectively.

In a second scheme, the door leaf lifting device comprises two screw rods, two first guide rails and two door carrying frames, wherein external threads with opposite rotation directions are respectively arranged on the two screw rods, the two screw rods are connected, one end of one screw rod is connected with the transmission part, the two screw rods are respectively provided with the nut assemblies, one ends of the two door carrying frames are respectively hinged to the two nut assemblies, the other ends of the two door carrying frames are respectively used for connecting two door leaves, and the two first guide rails are symmetrically arranged and respectively form movable connection with the two door carrying frames.

In a third scheme, the door lock comprises two screw rods, two first guide rails and two door carrying frames, wherein the two screw rods are respectively provided with external threads with opposite rotation directions, the two screw rods are coaxial, one ends of the two screw rods are respectively connected with the two transmission parts, the two screw rods are respectively provided with the nut assemblies, one ends of the two door carrying frames are respectively hinged to the two nut assemblies, the other ends of the two door carrying frames are respectively used for connecting two door leaves, and the two first guide rails are symmetrically arranged and respectively movably connected with the two door carrying frames.

A car comprises a car body and the power system, wherein the car body is provided with a door opening, and the power system is arranged above and/or below the door opening.

Compared with the prior art, use the utility model provides a pair of a driving system and car for door leaf has following beneficial effect:

1. the power system has the advantages of compact structure, small occupied space and convenience in installation, can drive the door leaf to run stably, provide accurate guide for the door leaf and the like, adopts the spiral transmission mechanism for transmission, is stable in transmission and quick in response, and is particularly suitable for a suspended car.

2. This driving system, the integrated level is high, through setting up the second guide rail, can not only effectively prevent the rotation of nut assembly at driven in-process to balanced effort along the screw rod circumferencial direction, the dead weight that can balance the door leaf moreover is particularly useful for the suspension type car to the moment of nut.

3. This driving system adopts screw drive mechanism transmission motion and power that screw rod and nut assembly constitute, can effectively avoid the problem that motor direct drive exists among the prior art, has both been favorable to more steady opening/closing of door leaf, and the driving motor's of being convenient for nimble is arranged again to the limited space in the rational utilization car, in addition, can also be convenient realize single opening the door and to the function of opening the door in the suspension type car.

4. The power system has wide application range, is not only suitable for cars in rail transit systems, such as subway cars, high-speed rail cars, motor car cars, suspended cars and the like, but also suitable for occasion door mechanisms which need to be automatically opened/closed by adopting power, such as bus doors, garage doors and the like.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a top view of a power system provided in embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of a door carrying frame in a power system provided in embodiment 1 of the present invention.

Fig. 3 is a schematic structural diagram of a power system provided in embodiment 1 of the present invention after the nut assembly is assembled with the door carrying frame and the second guide rail.

Fig. 4 is a schematic structural diagram of a nut assembly in a power system provided in embodiment 1 of the present invention.

Fig. 5 is a schematic structural diagram of a power system provided in embodiment 1 of the present invention.

Fig. 6 is a schematic top view of a power system provided in embodiment 2 of the present invention.

Fig. 7 is a schematic top view of another power system provided in embodiment 2 of the present invention.

Fig. 8 is a schematic three-dimensional structure diagram of another power system provided in embodiment 2 of the present invention.

Fig. 9 is a schematic three-dimensional structure diagram of a power system provided in embodiment 2 of the present invention.

Fig. 10 is a schematic three-dimensional structure diagram of the power system provided in fig. 9 after a cover plate is disposed.

Description of the drawings

A driving motor 101, a universal joint 102, a screw 103, a nut assembly 104, a door carrying frame 105, a first guide rail 106, a second guide rail 107,

A first straight line segment 201, an arc segment 202, a second straight line segment 203,

A first connecting part 301, a second connecting part 302, a supporting wheel 303,

A third connection part 401, a fourth connection part 402,

The device comprises a bottom plate 502, a side plate 503, a cover plate 504, a bearing seat 505, a middle support seat 506 and a position sensor 601.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1, fig. 2 and fig. 3, the present embodiment provides a power system for a door leaf, including a screw 103, a nut assembly 104, a first guide rail 106 and a door carrying frame 105, wherein the screw 103 is provided with an external thread, the nut assembly 104 is provided with an internal thread adapted to the external thread, and the nut assembly 104 and the screw 103 form a sliding pair; the door carrier 105 is movably connected to the first guide rail 106, one end of the door carrier 105 is hinged to the nut assembly 104, the other end of the door carrier is used for connecting a door leaf, and the first guide rail 106 is used for guiding and/or supporting the door carrier 105 when the nut assembly 104 drives the door carrier 105 to move. In the scheme, the spiral transmission mechanism is adopted for transmission, so that the transmission is stable, the response is fast, and the door leaf can be opened/closed quickly, so that the efficiency is improved; a separate guide rail is arranged at the door carrying frame 105, so that accurate guide can be provided for opening/closing of the door leaf; in addition, the nut assembly 104, the first guide rail 106 and the door leaf are combined together by the door carrying frame 105, so that the power system is more compact in structure, small in occupied space and convenient to install, and is favorable for driving the door leaf to run stably.

It can be appreciated that the first guide rail 106 may be disposed above the door carrying frame 105, or may be disposed below the door carrying frame 105, and when the first guide rail 106 is disposed above the door carrying frame 105, the first guide rail 106 only has a guiding function, and when the first guide rail 106 is disposed below the door carrying frame 105, the first guide rail 106 not only has a guiding function, but also can perform a function of supporting the door carrying frame 105, which is beneficial to improving the stress condition of the door carrying frame 105.

It is understood that the first rail 106 may be a straight rail, or the first rail 106 may be provided with a curved portion. When the first guide rail 106 is a straight guide rail, the first guide rail is used for guiding the door carrying frame 105 to move along a straight line, and at the moment, in the process of opening/closing the door leaf, the door leaf always moves along a straight line; when the first guide rail 106 is provided with a curved portion, the curved portion is used for changing the direction of the first guide rail 106, so that the moving track of the first guide rail 106 is not completely linear, and the moving direction of the door leaf can be changed in the opening/closing process of the door leaf, which is beneficial for the door leaf to move to the outer side of the car in the opening process. For example, as shown in fig. 1, in the present embodiment, the first guide rail 106 includes a first straight line segment 201, an arc-shaped segment 202, and a second straight line segment 203, two ends of the arc-shaped segment 202 are respectively connected to the first straight line segment 201 and the second straight line segment 203, the first straight line segment 201 is parallel to the screw 103, and the arc-shaped segment 202 is bent toward the screw 103. During assembly, the first straight line segment 201 of the first guide rail 106 is parallel to the screw 103, and the arc segment 202 is bent toward the screw 103 (i.e., toward the inside of the car), so that the door leaf can move to the outside of the car under the guiding action of the first guide rail 106 during opening of the door leaf.

In a preferred embodiment, the door carrying frame 105 is provided with a first connecting portion 301 for connecting the nut assembly 104 and a second connecting portion 302 adapted to the first guiding rail 106. By way of example, in the present embodiment, the first connection portion 301 may preferably adopt a hinge hole or a hinge pillar; by providing a hinge hole or a hinge post, a hinge may be conveniently formed with the nut assembly 104, such that during movement, the door carrying frame 105 may be rotated and/or moved relative to the nut assembly 104. In a further embodiment, as shown in fig. 1 and 2, the hinge holes are strip-shaped holes, and the length direction of the strip-shaped holes is parallel to the length direction of the portal frame 105. The strip-shaped holes are adopted, so that the door carrying frame 105 can rotate relative to the nut assembly 104 and can move relative to the nut assembly 104 in the process that the nut assembly 104 moves along the screw 103; therefore, the door carrying frame 105 can not only move along the length direction of the screw 103 under the driving of the nut assembly 104, but also move along the direction close to the screw 103 under the constraint of the first guide rail 106, so that the door carrying frame can move in a synthetic curve, and the door can be opened and closed more conveniently.

In a preferred embodiment, the second connecting portion 302 is a guide wheel, a cam bearing or a protruding portion disposed on the door carrying frame 105, so as to be clamped into the first rail 106 and be capable of sliding/rolling along the first rail 106, and the second connecting portion 302 has various structures, and the second connecting portion 302 may be a guide wheel, a cam bearing or a protruding portion disposed on the door carrying frame 105, and may be inserted into the first rail 106 and slide and roll along the first rail 106 during the movement of the door carrying frame 105, so as to implement a guiding function; in addition, the second connecting portion 302 may form a rail pair with the first rail 106, so that the door carrier 105 may move along a predetermined path under the constraint of the rail pair, and it can be understood that, in this embodiment, the rail pair may be a rail pair commonly used in the prior art, which is not described herein again, but for example, in this embodiment, the second connecting portion 302 employs a cam bearing, as shown in fig. 2, one end of which is fixed to the door carrier 105, and the other end of which extends into the first rail 106, so as to facilitate rolling along the first rail 106.

In a preferred scheme, the nut assembly 104 is provided with a third connecting part 401 adapted to the first connecting part 301, and the first connecting part 301 and the third connecting part 401 form a hinge joint, so that the nut assembly 104 and the door carrying frame 105 are hinged to facilitate transmission; preferably, the third connecting portion 401 is a transmission rod, a transmission shaft, a pin, a bolt or a screw. So as to form an articulation with the portal 105. By way of example, as shown in fig. 3, in the present embodiment, the third connecting portion 401 is a bolt which passes through the strip-shaped hole and is fixed to the nut assembly 104, thereby constraining the door carrier 105 between the nut of the bolt and the nut assembly 104, so that the door carrier 105 can move relative to the nut assembly 104 as well as relative to the nut assembly 104.

In a more preferred version, the door carrier 105 is further provided with support wheels 303 for supporting the door carrier 105, as shown in fig. 3, which will not be described in further detail herein.

In a further aspect, the power system further includes a second guide rail 107, the second guide rail 107 is parallel to the screw 103 and is disposed on one side of the screw 103, the nut assembly 104 is provided with a fourth connecting portion 402, the nut assembly 104 is movably connected to the second guide rail 107 through the fourth connecting portion 402, and the second guide rail 107 prevents the nut assembly 104 from rotating by restraining the fourth connecting portion 402. In the present scheme, the fourth connecting portion 402 is adapted to the second guide rail 107, in the moving process of the nut assembly 104, the fourth connecting portion 402 can move along the second guide rail 107, and the second guide rail 107 can provide a constraint for the fourth connecting portion 402, which can not only effectively prevent the nut assembly 104 from rotating, but also balance the stress on the nut assembly 104 in the moving process of the nut assembly 104, for example, can effectively balance the moment generated by the gravity of the door leaf at the nut assembly 104, and the like, thereby facilitating the nut assembly 104 to move stably along the screw 103.

It can be understood that there are various structures of the fourth connecting portion 402, and in a preferred embodiment, the fourth connecting portion 402 may be a limiting rod, a limiting block, a cam bearing or a balance wheel connected by a shaft, or the fourth connecting portion 402 and the second guide rail 107 form a guide rail pair. With the fourth connecting portion 402 having the above structure, after the assembly is completed, one end of the fourth connecting portion 402 is located in the second guide rail 107, so that the fourth connecting portion 402 can move or roll along the second guide rail 107 during the movement of the nut assembly 104, and the nut is effectively prevented from rotating. For example, as shown in fig. 1, 3 and 4, in the present embodiment, the fourth connecting portion 402 is a balance wheel connected by a shaft, the shaft is fixed to the nut assembly 104, the balance wheel is disposed in the second guide rail 107 and can roll relative to the second guide rail 107, and the nut assembly 104 can be effectively prevented from rotating and can bear a load to balance the moment on the nut assembly 104.

In a preferred embodiment, the cross section of the first rail 106 and/or the second rail 107 is U-shaped, as shown in fig. 3, and the rail with such a structure is a common rail in the prior art, and is not described herein again.

In a further scheme, the power system further comprises an installation box, and the screw 103, the first guide rail 106 and the second guide rail 107 are respectively installed in the installation box, so that the integration and modularization of the power system are facilitated, and the whole installation on the car is also facilitated; for example, as shown in fig. 5 and 6, the mounting box includes a mounting groove surrounded by a bottom plate 502 and three side plates 503, and a detachable cover plate 504, two ends of the screw rod 103 are respectively fixed in the mounting groove through bearing seats 505, the first guide rail 106 is mounted on the side of the mounting groove where the side plates 503 are not disposed and is parallel to the screw rod 103, the second guide rail 107 is fixed to one side plate 503 and is parallel to the screw rod 103, the door carrying frame 105 extends out through the side of the mounting groove where the side plates 503 are not disposed so as to connect the door leaf, and an opening is disposed on one side plate 503 at one end so that the screw rod 103 is connected with the transmission part; as shown in fig. 6, a cover plate 504 is used to close the upper portion of the installation box to support load during use and to facilitate opening during servicing.

In a further scheme, the device further comprises a driving motor 101 and a transmission part, wherein two ends of the transmission part are respectively connected with the driving motor 101 and the screw 103 for transmission. The driving motor 101 is used to provide power for opening/closing the door leaf.

Preferably, the transmission part is a universal joint 102 or a transmission shaft.

For example, as shown in fig. 1, 5 or 6, in the present embodiment, a driving motor 101 is connected to a screw 103 via a universal joint 102.

It can be understood that only one door carrying frame 105 is arranged in the power system and can be connected with one door leaf, so that when the power system is installed in the car, the single-opening function of the door leaf can be effectively realized.

In a more perfect scheme, the device also comprises a controller and a position sensor 601, wherein the position sensor 601 and the driving motor 101 are respectively connected with the controller,

the position sensor 601 is used for detecting the position of the nut assembly 104 (only one nut assembly 104 is detected), generating a sensing signal when the nut assembly 104 moves to a set position, transmitting the sensing signal to the controller, and controlling the driving motor 101 to be turned off when the controller receives the sensing signal; in addition, the controller is also used for controlling the driving motor 101 to be started so as to realize the opening/closing of the door leaf.

The position sensor 601 generally detects the extreme position of the nut assembly 104, such as the extreme end position, so as to timely turn off the driving motor 101;

in a preferred embodiment, the position sensor 601 may be a proximity switch, a photoelectric sensor, etc., which are not illustrated herein.

It is understood that the controller may be a central processing unit, a single chip, a P L C, ARM chip, etc. of the car, which are not illustrated herein.

Example 2

On the basis of embodiment 1, when the power system provided by the embodiment is installed in a car, the function of opening two door leaves can be effectively realized.

In order to realize the function of opening a door, in a first scheme provided in this embodiment, as shown in fig. 7, two screws 103, two first guide rails 106 and two door carrying frames 105 are provided in the installation box, the two screws 103 are respectively provided with external threads with opposite rotation directions, the two screws 103 are coaxial, one ends of the two screws 103 are respectively connected to the two transmission portions, the two screws 103 are respectively provided with the nut assemblies 104, one ends of the two door carrying frames 105 are respectively hinged to the two nut assemblies 104, the other ends of the two door carrying frames 105 are respectively used for connecting two door leaves, and the two first guide rails 106 are symmetrically arranged and respectively form a movable connection with the two door carrying frames 105. That is, in this embodiment, two sets of the power systems described in embodiment 1 are included, and in actual use, the two drive motors 101 synchronously control the forward/reverse rotation of the two screws 103, respectively, so as to realize the synchronous opening/closing of the two door leaves.

To facilitate the installation of the first rails 106, a middle support base 506 is further disposed between the two first rails 106, and can fix the first rails 106 and support the cover plate 504.

In a second scheme provided in this embodiment, as shown in fig. 8, two nut assemblies 104, two first guide rails 106 and two door carrying frames 105 are arranged in the installation box, two sections of external threads are arranged on the screw 103, the turning directions of the two sections of external threads are opposite, one end of the screw 103 is connected with the transmission part, the two nuts are respectively arranged at the two sections of external threads, one ends of the two door carrying frames 105 are respectively hinged to the two nut assemblies 104, the other ends of the two door carrying frames are respectively used for connecting two door leaves, and the two first guide rails 106 are symmetrically arranged and respectively form a movable connection with the two door carrying frames 105. In the scheme, two nut assemblies 104 are synchronously driven to move through one screw 103, so that the two door leaves are synchronously opened/closed.

In a third solution provided in this embodiment, as shown in fig. 9 and 10, two screws 103, two first guide rails 106 and two door carrying frames 105 are provided in the installation box, the two screws 103 are respectively provided with external threads with opposite rotation directions, the two screws 103 are connected, one end of one screw 103 is connected to the transmission portion, the two screws 103 are respectively provided with the nut assembly 104, one end of each of the two door carrying frames 105 is respectively hinged to the two nut assemblies 104, the other end of each of the two door carrying frames 105 is respectively used for connecting two door leaves, and the two first guide rails 106 are symmetrically arranged and respectively form a movable connection with the two door carrying frames 105. That is, in the present embodiment, the two screws 103 are connected together to rotate synchronously and are driven by the same driving motor 101, so as to realize the synchronous opening/closing of the two door leaves.

Example 3

The embodiment provides a car, which comprises a car body and the power system described in embodiment 1 or embodiment 2, wherein the car body is provided with a door opening, and the power system is arranged above and/or below the door opening so as to drive a door leaf to open/close.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.

Claims (10)

1. A power system for a door leaf is characterized by comprising a screw, a nut assembly, a first guide rail and a door carrying frame, wherein the screw is provided with an external thread, the nut assembly is provided with an internal thread matched with the external thread, and the nut assembly and the screw form a moving pair; the door carrying frame and the first guide rail are movably connected, one end of the door carrying frame is hinged to the nut assembly, the other end of the door carrying frame is used for being connected with a door leaf, and the first guide rail is used for guiding and/or supporting the door carrying frame.

2. The power system for a door leaf according to claim 1, wherein said first rail is a straight rail or the first rail is provided with a curved portion.

3. The power system for the door leaf as claimed in claim 1, wherein the door carrying frame is provided with a first connecting portion for connecting the nut assembly and a second connecting portion adapted to the first guide rail.

4. The power system for the door leaf as claimed in claim 3, wherein the first connecting portion is a hinge hole or a hinge column, and the hinge hole is a strip-shaped hole; the second connecting part is a guide wheel, a cam bearing or a protruding part arranged on the carrying frame, or the second connecting part and the first guide rail form a guide rail pair.

5. The power system for the door leaf as claimed in claim 1, further comprising a second guide rail parallel to the screw rod and disposed at one side of the screw rod, wherein the nut assembly is provided with a fourth connecting portion, the nut assembly is movably connected to the second guide rail through the fourth connecting portion, and the second guide rail prevents the nut assembly from rotating by restraining the fourth connecting portion.

6. The power system for the door leaf as claimed in claim 5, wherein the fourth connecting portion can be a limiting rod, a limiting block, a cam bearing or a balance wheel connected by a shaft, or the fourth connecting portion and the second guide rail form a guide rail pair.

7. The power system for the door leaf as claimed in claim 5, further comprising a mounting box, wherein the mounting box comprises a mounting groove defined by a bottom plate and three side plates, and a detachable cover plate, the screw rod is fixed in the mounting groove through a bearing seat, the first guide rail is mounted on one side of the mounting groove where no side plate is arranged and is parallel to the screw rod, the second guide rail is fixed on one side plate and is parallel to the screw rod, the door carrying frame extends out through one side of the mounting groove where no side plate is arranged, and the cover plate is used for sealing the upper part of the mounting box.

8. The power system for a door leaf as claimed in any one of claims 1 to 7, further comprising a driving motor and a transmission part, wherein both ends of the transmission part are respectively connected with the driving motor and the screw for transmission.

9. The power system for the door leaf as claimed in claim 8, wherein the power system comprises two nut assemblies, two first guide rails and two door carrying frames, two sections of external threads are arranged on the screw rod, the rotation directions of the two sections of external threads are opposite, one end of the screw rod is connected with the transmission part, the two nuts are respectively arranged at the two sections of external threads, one ends of the two door carrying frames are respectively hinged to the two nut assemblies, the other ends of the two door carrying frames are respectively used for connecting the two door leaves, the two first guide rails are symmetrically arranged and respectively form a movable connection with the two door carrying frames;

or the door leaf comprises two screw rods, two first guide rails and two door carrying frames, wherein the two screw rods are respectively provided with external threads with opposite rotation directions, the two screw rods are connected, one end of one screw rod is connected with the transmission part, the two screw rods are respectively provided with the nut assemblies, one ends of the two door carrying frames are respectively hinged to the two nut assemblies, the other ends of the two door carrying frames are respectively used for connecting two door leaves, and the two first guide rails are symmetrically arranged and are respectively movably connected with the two door carrying frames;

or the two first guide rails are symmetrically arranged and movably connected with the two door carrying frames respectively.

10. A car, characterized by comprising a car body and the power system of any one of claims 1 to 9, wherein the car body is provided with a door opening, and the power system is arranged above and/or below the door opening.

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