CN211893142U

CN211893142U - Active safety belt pretensioner

Info

Publication number: CN211893142U
Application number: CN202020260655.3U
Authority: CN
Inventors: 张余
Original assignee: Zhejiang Industry and Trade Vocational College
Current assignee: Zhejiang Industry and Trade Vocational College
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-11-10
Anticipated expiration: 2030-03-05

Abstract

The utility model discloses an active safety belt pretensioner, which comprises a base, a rotating shaft and a worm and gear reducer, the base is provided with a fixed seat, the rotating shaft is rotatably arranged on the fixed seat through a bearing, a first roller is fixedly arranged on the rotating shaft, an electromagnetic clutch is arranged at the other end of the rotating shaft, the rotating shaft of the worm gear reducer is connected with the electromagnetic clutch, a driving motor is fixedly arranged on one side of the worm gear reducer, and the output shaft of the driving motor is fixedly connected with the input shaft of the worm gear reducer, one end of the electric push rod is fixedly provided with a second roller, a first safety belt is inserted in the sliding sleeve, one end of the first safety belt is fixed on the first roller through a second roller, a second safety belt is fixedly connected to one side of the arm-chair on the upper part of the base, and a tension sensor is mounted on the second safety belt; so as to solve the problems of high cost and incapability of popularizing the active pretensioner.

Description

Active safety belt pretensioner

Technical Field

The utility model relates to a safety belt pretensioner technical field specifically is an active safety belt pretensioner.

Background

The safety belt can be when the car bumps the effectual protection human body, but current safety belt is mainly passive locking formula, because the scalability of safety belt is very big, consequently this kind of safety belt is difficult effectively to protect the human body when really taking place danger, current high-grade car all begins to be equipped with the better active safety belt of security performance, the change of the instantaneous detection acceleration of active safety belt can take place at the collision to take up the safety belt in advance, tie up the passenger tightly on the seat, thereby the effectual injury that reduces the collision to the passenger.

However, the existing active safety belts still have many problems, and because the cost is high, the safety belts on the common vehicles are not provided with an active transmission system, a tightening device and a sensing device, and only a mechanical locking device is locked by the pulling speed of the self rope belt, so that great potential safety hazards exist. Accordingly, there is a need for an active seat belt pretensioner.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an active safety belt pretensioner uses through driving motor and electric putter cooperation, plays the initiative and contracts the safety belt, and furthest's guarantee safety by bus, structural design is simple reasonable, low in manufacturing cost is honest and clean, and the dismouting and the regulation of being convenient for can all assemble the use to general seat, convenient operation, the safety and stability, application scope is wide to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: an active safety belt pretensioner comprises a base, a rotating shaft and a worm gear reducer, wherein a fixed base is mounted on the base, the rotating shaft is rotatably mounted on the fixed base through a bearing, a first roller is fixedly mounted on the rotating shaft, a torsion spring is fixedly mounted at one end of the rotating shaft, an electromagnetic clutch is mounted at the other end of the rotating shaft, the rotating shaft of the worm gear reducer is connected with the electromagnetic clutch, a driving motor is fixedly mounted on one side of the worm gear reducer, an output shaft of the driving motor is fixedly connected with an input shaft of the worm gear reducer, an electric push rod is fixedly mounted on the base, a second roller is fixedly mounted at one end of the electric push rod, a sliding sleeve is fixedly mounted on the side face of the base, a first safety belt is inserted in the sliding sleeve, one end of the first safety belt is fixed on the first roller through the second roller, one side of the arm-chair on the upper part of the base is fixedly connected with a second safety belt, and a tension sensor is arranged on the second safety belt.

Preferably, a PLC controller is installed on the base.

Preferably, a third roller is fixedly installed in the base, and the third roller is arranged on the lower portion of the sliding sleeve.

Preferably, one end of the second safety belt is fixedly connected with a lock head which is matched and locked with the lock catch.

Preferably, base upper portion fixed mounting has the cushion, and installs pressure sensor in the cushion, and pressure sensor's signal output part and PLC controller's signal input part electric connection.

Preferably, the signal output end of the tension sensor is electrically connected with the signal input end of the PLC controller, and the control output end of the PLC controller is electrically connected with the electric control ends of the electromagnetic clutch, the driving motor and the electric push rod respectively.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the driving motor is matched with the electric push rod for use, the safety belt is actively tensioned and contracted, the riding safety is guaranteed to the maximum extent, the structural design is simple and reasonable, the manufacturing cost is low, the disassembly and the adjustment are convenient, the assembly and the use can be carried out on common seats, the operation is convenient, the safety and the stability are realized, the application range is wide, and the problems that the active pretensioner is high in cost and cannot be popularized are solved;

2. the signal is transmitted to the PLC through the tension sensor, when a set value is reached, the PLC controls the electromagnetic clutch and starts the driving motor simultaneously, so that the output end of the worm gear reducer is fixedly connected with the rotating shaft to drive the first roller to retract the first safety belt, safety and reliability are achieved, the safety belt is actively locked, and riding safety is guaranteed more.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the base of the present invention;

fig. 3 is a schematic side view of the present invention.

In the figure: the safety belt safety device comprises a base 1, a cushion 11, a sliding sleeve 12, a first safety belt 13, a lock catch 14, a third roller 15, a second safety belt 16, a first roller 2, a rotating shaft 21, a fixed seat 22, a torsion spring 23, a worm gear reducer 3, an electromagnetic clutch 4, a driving motor 5, an electric push rod 6, a second roller 61, a pressure sensor 7, a tension sensor 8 and a PLC 9.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an active safety belt pretensioner comprises a base 1, a rotating shaft 21 and a worm gear reducer 3, wherein a fixing seat 22 is installed on the base 1, the rotating shaft 21 is installed on the fixing seat 22 in a rotating mode through a bearing, a first roller 2 is fixedly installed on the rotating shaft 21, a torsion spring 23 is fixedly installed at one end of the rotating shaft 21, an electromagnetic clutch 4 is installed at the other end of the rotating shaft 21, the rotating shaft of the worm gear reducer 3 is connected with the electromagnetic clutch 4, a driving motor 5 is fixedly installed on one side of the worm gear reducer 3, an output shaft of the driving motor 5 is fixedly connected with an input shaft of the worm gear reducer 3, an electric push rod 6 is fixedly installed on the base 1, a second roller 61 is fixedly installed at one end of the electric push rod 6, a sliding sleeve 12 is fixedly installed on the side of the base 1, a first safety belt 13 is inserted in the sliding sleeve 12, one end of the first safety belt 13 is, and the upper end of the first safety belt 13 is fixedly connected with a lock catch 14, one side of the armchair at the upper part of the base 1 is fixedly connected with a second safety belt 16, and the second safety belt 16 is provided with a tension sensor 8.

Specifically, the base 1 is provided with a PLC (programmable logic controller) 9 for controlling the pretensioner to make corresponding feedback under the set condition.

Specifically, a third roller 15 is fixedly installed in the base 1, and the third roller 15 is disposed at the lower portion of the sliding sleeve 12, and is used for supporting the first safety belt 13 and reducing resistance during retraction.

Specifically, one end of the second safety belt 16 is fixedly connected with a lock head which is matched and locked with the lock catch 14.

Specifically, 1 upper portion fixed mounting of base has cushion 11, and installs pressure sensor 7 in the cushion 11, and pressure sensor 7's signal output part and PLC controller 9's signal input part electric connection, whether have the passenger on detecting cushion 11 through pressure sensor 7, does not start when realizing nobody.

Specifically, the signal output end of the tension sensor 8 is electrically connected with the signal input end of the PLC controller 9, and the control output end of the PLC controller 9 is electrically connected with the electric control ends of the electromagnetic clutch 4, the driving motor 5 and the electric push rod 6 respectively.

The working principle is as follows: the lock 14 is inserted through the lock head in a normal state, the first safety belt 13 can be elastically pulled through the torsion spring 23, whether a passenger is on a seat or not is detected through the pressure sensor 7, so that the seat is not started when no one is available, when collision or emergency braking occurs, the first safety belt 13 is actively tensioned and contracted through the matching of the driving motor 5 and the electric push rod 6, the riding safety is guaranteed to the maximum extent, the structural design is simple and reasonable, the manufacturing cost is low, the seat is convenient to disassemble, assemble and use, the operation is convenient, the safety and the stability are high, the application range is wide, and the problems that an active pretensioner is high in cost and cannot be popularized are solved; transmit the signal for PLC controller 9 through tension sensor 8, when reaching the setting value, PLC controller 9 is through controlling electromagnetic clutch 4, start driving motor 5 simultaneously, make worm gear reduction gear 3's output and pivot 21 fixed connection drive first cylinder 2 and contract first safety belt 13, safety and reliability, realize the first safety belt 13 of initiative locking, worm gear reduction gear 3 is the one-way axle output, make moment can not reverse input, can only be by the first safety belt 13 relaxation of driving motor 5 adjustment of input, and then can not pull out first safety belt 13 because of impulsive force greatly when the emergence accident, good auto-lock effect has been had, safety has been ensured more, safety by bus has been ensured more, be favorable to promoting and popularizing.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An active safety belt pretensioner comprises a base (1), a rotating shaft (21) and a worm gear reducer (3), and is characterized in that: the safety belt device is characterized in that a fixing seat (22) is installed on the base (1), the rotating shaft (21) is installed on the fixing seat (22) through rotation of a bearing, a first roller (2) is fixedly installed on the rotating shaft (21), a torsion spring (23) is fixedly installed at one end of the rotating shaft (21), an electromagnetic clutch (4) is installed at the other end of the rotating shaft (21), the rotating shaft of the worm gear reducer (3) is connected with the electromagnetic clutch (4), a driving motor (5) is fixedly installed at one side of the worm gear reducer (3), an output shaft of the driving motor (5) is fixedly connected with an input shaft of the worm gear reducer (3), an electric push rod (6) is fixedly installed on the base (1), a second roller (61) is fixedly installed at one end of the electric push rod (6), a sliding sleeve (12) is fixedly installed on the side of the base (1), and a first safety belt (, one end of the first safety belt (13) is fixed on the first roller (2) through the second roller (61), the upper end of the first safety belt (13) is fixedly connected with a lock catch (14), one side of the arm-chair on the upper portion of the base (1) is fixedly connected with a second safety belt (16), and the second safety belt (16) is provided with a tension sensor (8).

2. An active seat belt pretensioner according to claim 1, wherein: and the base (1) is provided with a PLC (programmable logic controller) (9).

3. An active seat belt pretensioner according to claim 1, wherein: a third roller (15) is fixedly installed in the base (1), and the third roller (15) is arranged on the lower portion of the sliding sleeve (12).

4. An active seat belt pretensioner according to claim 1, wherein: one end of the second safety belt (16) is fixedly connected with a lock head which is matched and locked with the lock catch (14).

5. An active seat belt pretensioner according to claim 2, wherein: base (1) upper portion fixed mounting has cushion (11), and installs pressure sensor (7) in cushion (11), and the signal output part of pressure sensor (7) and the signal input part electric connection of PLC controller (9).

6. An active seat belt pretensioner according to claim 2, wherein: the signal output end of the tension sensor (8) is electrically connected with the signal input end of the PLC (9), and the control output end of the PLC (9) is electrically connected with the electric control ends of the electromagnetic clutch (4), the driving motor (5) and the electric push rod (6) respectively.