CN210564009U

CN210564009U - Electric supporting device

Info

Publication number: CN210564009U
Application number: CN201920876341.3U
Authority: CN
Inventors: 李丹
Original assignee: Shenzhen Huaxingwei Technology Co Ltd
Current assignee: Shenzhen liquansheng Technology Co.,Ltd.
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-05-19
Anticipated expiration: 2029-06-11

Abstract

The utility model relates to an electric supporting device, which comprises a shell component, a motor component, a screw rod component, an air spring and a nut component; the shell component is cylindrical; the motor component is axially arranged in the shell component; the screw rod assembly is rotatably arranged in the shell assembly and is connected with an output shaft at one end of the motor assembly; one end of the gas spring is arranged in the screw rod assembly in a penetrating way; one end of the nut component is screwed on the screw rod component and is limited by the shell component in the circumferential direction, and the other end of the nut component is connected with the other end of the gas spring. The utility model provides a substitute pretension mechanical spring by the air spring of invariable atmospheric pressure output for the design method of main supporting mechanism, its beneficial effect: the structure is simple, the production and assembly processes of the product are simplified, the automatic production is realized, the consistency, the stability and the safety of the product are improved, and the product cost can be reduced.

Description

Electric supporting device

Technical Field

The utility model relates to a strutting arrangement, concretely relates to electronic strutting arrangement.

Background

At present, most of electric supporting devices such as a vehicle tail door are supported by a pre-tightening mechanical spring under the power of a motor, so that the opening and the closing of the passenger vehicle tail door are realized. The steel spring is a mechanical spring, the movement speed of the mechanical spring is high, and once the electric supporting device is damaged, the energy-storing steel spring is easy to jump out rapidly, so that nearby personnel are easy to be injured, and certain potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an electronic strutting arrangement of modified lies in providing.

The utility model provides an electric supporting device, which comprises a shell component, a motor component, a screw rod component, an air spring and a nut component; the motor assembly is arranged in the shell assembly; the screw rod assembly is rotatably arranged in the shell assembly and is connected with an output shaft of the motor assembly; one end of the gas spring is arranged in the screw rod assembly in a penetrating way, and the other end of the gas spring is arranged in the nut assembly in a penetrating way; one end of the nut component is screwed on the screw rod component and is limited by the shell component in the circumferential direction, and the other end of the nut component is connected with the other end of the gas spring.

In some embodiments, the electric motor assembly includes an electric motor and a transmission cooperating with the electric motor.

In some embodiments, the housing assembly includes a cylindrical first housing and a bearing assembly mounted in the first housing, and one end of the lead screw assembly is inserted into the bearing assembly.

In some embodiments, the bearing assembly includes a bearing seat, an axial bearing and a radial bearing, the bearing seat is fixedly installed in the first housing, the axial bearing and the radial bearing are respectively disposed in the bearing seat, and one end of the screw rod assembly is inserted into the axial bearing and the radial bearing.

In some embodiments, the housing assembly further comprises a first connector mounted to an end of the first housing.

In some embodiments, the first housing includes at least one axially extending stop strip formed on the inner wall surface, the at least one stop strip cooperating with the nut assembly to limit rotation of the nut assembly in the circumferential direction.

In some embodiments, the screw assembly includes a transmission shaft and a cylindrical screw body having one end connected to the transmission shaft, the transmission shaft is connected to the output shaft of the motor assembly, and the one end of the nut assembly is screwed onto the screw body.

In some embodiments, the nut assembly includes a nut and a second housing, the nut is threaded on the lead screw body and is axially movably mounted in the first housing; one end of the second shell is connected with the nut, and the other end of the second shell is connected with the other end of the gas spring; the other end of the gas spring penetrates through the second shell.

In some embodiments, the nut assembly further includes a second bearing disposed within the second housing, the other end of the gas spring being disposed through the second bearing.

In some embodiments, the nut further comprises at least one axially extending retaining groove in an outer wall surface of the nut, the at least one retaining groove cooperating with the housing assembly to limit rotation of the nut in the circumferential direction.

In some embodiments, the motorized support device further comprises a washer and/or a retainer ring at the end of the lead screw body.

In some embodiments, the nut assembly includes a second connector rotatably mounted to the other end of the second housing.

In some embodiments, the electric supporting device further includes a middle sleeve member installed between one end of the first housing and the nut to prevent circumferential displacement when sliding between the first housing and the second housing.

The utility model discloses beneficial effect: by means of the characteristics of the gas spring, a safe and reliable electric supporting device is provided.

Drawings

Fig. 1 is a schematic structural view of an electric supporting device according to some embodiments of the present invention.

3 fig. 32 3 is 3 a 3 sectional 3 view 3 of 3 the 3 electric 3 supporting 3 device 3 shown 3 in 3 fig. 31 3. 3

Fig. 3 is a schematic structural view of a screw and bearing assembly of an electric support device according to some embodiments of the present invention.

3 figure 3 4 3 is 3 a 3 cross 3- 3 sectional 3 view 3 of 3 the 3 lead 3 screw 3 and 3 bearing 3 assembly 3 of 3 figure 3 3 3 taken 3 along 3 the 3 direction 3 a 3- 3 a 3. 3

Fig. 5 is a schematic perspective view of a part of a nut assembly of an electric supporting device according to some embodiments of the present invention.

Fig. 6 is a schematic structural view of a part of a nut assembly of an electric supporting device according to some embodiments of the present invention.

3 figure 3 7 3 is 3 a 3 cross 3- 3 sectional 3 view 3 of 3 the 3 nut 3 assembly 3 shown 3 in 3 figure 3 6 3 taken 3 along 3 the 3 line 3 a 3- 3 a 3. 3

Detailed Description

The following detailed description and embodiments of the present invention will be made in detail and clearly with reference to the accompanying drawings and examples. In addition, like reference numerals in the drawings denote like structural features in the motorized support devices of some embodiments.

Fig. 1 and 2 show schematic structural views of an electric supporting device 1 according to some embodiments of the present invention. The electric supporting device 1 can be used for supporting a supported object such as a vehicle tail door and the like and realizing electric control on opening and closing of the supported object. The motorized support device 1 may include a housing assembly 10, a motor assembly 20, a lead screw assembly 30, a gas spring 40, and a nut assembly 50. The housing assembly 10 is in a cylindrical shape, and serves as a part of the electric supporting device 1 contacting with the external environment, and serves as a base part for mounting other internal parts, so that other parts can be effectively assembled together. The motor assembly 20 is axially mounted inside the housing assembly 10 for outputting electric power. The screw assembly 30 is rotatably installed inside the housing assembly 10 and connected to an output shaft at one end of the motor assembly 20 for transmitting power. One end of the gas spring 40 is arranged in the screw rod assembly 30 in a penetrating way and used for providing axial supporting force for the electric supporting device 1. One end of the nut component 50 is screwed on the screw rod component 30 and is limited by the shell component 10 in the circumferential direction, and the other end is connected with the other end of the gas spring 40 so as to move back and forth along the axial direction under the driving of the screw rod component 30, so that the supporting balance of the gas spring 40 is broken, and the expansion and contraction of the gas spring 40 are controlled. The electric supporting device 1 does not pop out like a pre-tightened mechanical spring even if damaged by the characteristics of the gas spring 40, thereby providing a safe and reliable electric supporting device.

As further shown in fig. 1 and 2, the housing assembly 10 may include, in some embodiments, a first housing 11, a bearing assembly 12 mounted in the first housing 11, a first end cap 13 mounted at one end of the first housing 11, and a first connector 14 mounted on the first end cap 13. The first housing 11 may have a cylindrical shape for mounting the power supply unit 20, the lead screw unit 30, the nut unit 50, and the like therein. The bearing assembly 12 is used for supporting one end of the screw assembly 30, so that the screw assembly 30 is rotatably mounted in the first housing 11. The end cover 13 can seal one end of the first shell 11 to play roles of water proofing, dust proofing and the like; and on the other hand, for the first connector 14 to be mounted thereon. The first connector 14 is used for mounting one end of the electric supporting apparatus 1 to, for example, the surroundings of a vehicle body.

As shown in fig. 3 and 4, the bearing assembly 12 may include a bearing seat 121, an axial bearing 122, a radial bearing 123, a sealing ring 124 disposed between the bearing seat 121 and the first housing 11, and a retainer ring 125 disposed outside the axial bearing 122 in some embodiments. The bearing seat 121 can be fixedly installed in the first housing 11, and the axial bearing 121 and the radial bearing 122 are respectively disposed in the bearing seat 121 to respectively provide axial and radial supporting forces for the lead screw assembly 30, so as to reduce friction force of the lead screw assembly 30 during rotation. The sealing ring 124 is an elastic sealing ring made of rubber material, and is used to reduce noise generated when the motor assembly 20 rotates and to prevent water. In some embodiments, the retainer ring 125 may be made of an alloy material to prevent the axial bearing 122 from slipping.

In some embodiments, the first housing 11 may further include a plurality of axially extending limiting strips 110 formed on the inner wall surface, and the limiting strips 110 may be formed by radially inwardly recessing the sidewall of the first housing 11 for cooperating with the nut assembly 50 to limit the rotation of the nut assembly 50 in the circumferential direction so that the nut assembly 50 can only move in the axial direction relative to the first housing 11.

Referring to fig. 3 and 4 together, the lead screw assembly 30 may include a transmission shaft 31 and a cylindrical lead screw body 32 having one end coaxially connected to the transmission shaft 31 in some embodiments. The transmission shaft 31 is axially disposed in the bearing assembly 12 and coaxially engaged with the transmission 22 of the motor assembly 20, and under the rotation of the transmission 22 of the motor assembly 20, the thread lead thereof enables the nut member of the nut assembly 50 to rapidly make a reciprocating linear motion on the lead screw assembly 30. In some embodiments, the external threads on the lead screw body 32 are a multi-start thread structure. In some embodiments, the inner diameter of the lead screw body 32 is larger than the outer diameter of the gas spring 40 for the gas spring 40 to be mounted inside the cylindrical lead screw body 32.

As further shown in fig. 2, the gas spring 40 may, in some embodiments, include a cylinder 41 and a piston rod 42 axially movably disposed in the cylinder 41. The cylinder 41 axially penetrates through the screw rod body 32, and the piston rod 42 axially penetrates through the nut component 50 and is connected with the nut component 50.

As shown in fig. 5-7, in some embodiments, the nut assembly 50 may include a second housing 51, a nut 52, a second end cap 53, a second connector 54, and a second bearing 55. The nut 52 is threaded on the lead screw body 32 and is axially movably mounted in the first housing 11 for axial movement back and forth when the lead screw body 32 rotates. The second housing 51 is connected at one end to the nut 52 to move as the nut 52 moves. A second end cap 53 is mounted on the other end of the second housing 51 and is connected to the rod end 42 of the gas spring 40. The second end cap 53 is mounted on the second housing 51 by riveting, and can perform sealing functions such as dust prevention and dust prevention. A second connector 54 is mounted on the second end cap 53 for connection to the supported object. In some embodiments, the second connector 54 is rotatably mounted on the second end cap 53 to enhance adaptability. In some embodiments, the nut 52 is a multi-start nut, and the multi-start nut and the multi-start lead screw are provided with a thread pitch and a thread depth so as to enable coaxial movement on the multi-start lead screw. The second bearing 55 is disposed inside the second end cap 53 and is connected to a rod end of the gas spring 40.

As shown in fig. 5 and 6, in some embodiments, the nut 52 further includes a plurality of axially extending limiting grooves 520 on the outer wall surface of the nut, and the limiting grooves 520 are matched with the limiting strips 110 on the first housing 11 to prevent the nut 520 from rotating circumferentially on the lead screw body 32.

As shown in fig. 1 and 2, in some embodiments, the electric supporting device 1 may further include a middle sleeve part 60, wherein the middle sleeve part 60 is connected between the first housing 11 and the nut 52 for preventing the first housing 11 and the nut 52 from slipping off, and is waterproof and dustproof. In some embodiments, the middle sleeve member 60 may further include a plurality of sliding protruding points 601, which are matched with the second housing 51 of the nut component 50, for preventing the first housing 11 from sliding or falling off between the second housings.

As further shown in fig. 2, in some embodiments, the electric supporting device 1 may further include a washer 70 and a retainer ring 80 at an end of the lead screw assembly 30 close to the nut 52 for buffering the nut 52 during the back and forth movement.

The utility model provides a substitute pretension mechanical spring by the air spring of invariable atmospheric pressure output for the design method of main supporting mechanism, its beneficial effect: the structure is simple, the production and assembly processes of the product are simplified, the automatic production is realized, the consistency, the stability and the safety of the product are improved, and the product cost can be reduced.

The above disclosure is only for some specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be made by those skilled in the art should fall within the scope of the present invention.

Claims

1. An electric supporting device is characterized in that: the device comprises a shell assembly, a motor assembly, a screw rod assembly, a gas spring and a nut assembly; the motor assembly is arranged in the shell assembly; the screw rod assembly is rotatably arranged in the shell assembly and is connected with an output shaft of the motor assembly; one end of the gas spring is arranged in the screw rod assembly in a penetrating mode, and the other end of the gas spring is arranged in the nut assembly in a penetrating mode; one end of the nut assembly is screwed on the screw rod assembly and limited by the shell assembly in the circumferential direction, and the other end of the nut assembly is connected with the other end of the gas spring.

2. The motorized support device of claim 1, wherein: the shell assembly comprises a cylindrical first shell and a bearing assembly arranged in the first shell, and one end of the screw rod assembly penetrates through the bearing assembly.

3. The motorized support device of claim 2, wherein: the housing assembly further includes a first connector mounted to one end of the first housing.

4. The motorized support device of claim 2, wherein: the first shell comprises at least one limiting strip which is formed on the inner wall surface and extends along the axial direction, and the at least one limiting strip is matched with the nut component to limit the rotation of the nut component in the circumferential direction.

5. The motorized support device of any one of claims 1 to 4, wherein: the screw rod assembly comprises a transmission shaft and a cylindrical screw rod body, one end of the cylindrical screw rod body is connected with the transmission shaft, and the transmission shaft is connected with an output shaft of the motor assembly; the end of the nut component is sleeved on the lead screw body in a threaded manner.

6. The motorized support device of claim 5, wherein: the nut assembly comprises a nut and a second shell, and the nut is screwed on the lead screw body and is axially movably arranged in the first shell; one end of the second shell is connected with the nut, and the other end of the second shell is connected with the other end of the gas spring; the other end of the gas spring penetrates through the second shell.

7. The motorized support device of claim 6, wherein: the nut component comprises a second bearing arranged in the second shell, and the other end of the gas spring penetrates through the second bearing.

8. The motorized support device of claim 6, wherein: the nut further comprises at least one limiting groove which is located on the outer wall surface of the nut and extends along the axial direction, and the at least one limiting groove is matched with the shell assembly to limit the nut to rotate in the circumferential direction.

9. The motorized support device of claim 5, wherein: the electric support device also comprises a gasket and/or a check ring positioned at the tail end of the screw rod body.

10. The motorized support device of claim 6, wherein: the nut component comprises a second connector, and the second connector is rotatably arranged at the other end of the second shell.