CN107539266B

CN107539266B - Double-end pretension formula car blet

Info

Publication number: CN107539266B
Application number: CN201710659973.XA
Authority: CN
Inventors: 杜波涛; 谢文风; 林涛
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2017-08-03
Filing date: 2017-08-03
Publication date: 2024-03-26
Anticipated expiration: 2037-08-03
Also published as: CN107539266A

Abstract

The invention provides a double-head pre-tightening type automobile safety belt which comprises a braid, a pre-tightening device shell, a piston, a braid reel, a pre-tightening rack, a driving gear and a power generation device, wherein one end of the braid is connected with a safety belt lock catch, the other end of the braid is connected with the piston, one end of the piston, which is opposite to a guy cable, is attached to the end face of the pre-tightening rack, the pre-tightening rack is meshed with the driving gear, and the braid reel is fixedly connected with the driving gear and can rotate along with the rotation of the driving gear. The invention can push the driving gear to rotate while the webbing is pulled back, thereby driving the webbing spool to rotate, and realizing the function of double-head pre-tightening the safety belt while keeping the cost, the volume and the weight of the single-spool single pre-tightening device.

Description

Double-end pretension formula car blet

Technical Field

The invention relates to the field of automobile safety, in particular to an automobile safety belt with a pre-tightening function.

Background

Seat belts are the most important component of occupant restraint systems. The traditional safety belt consists of a retractor, a webbing and a buckle, and in actual use, a certain gap exists between the safety belt and a human body, if the gap is too large, the effective acting range of the safety belt is reduced, and the efficiency of the safety belt is reduced. The pre-tightening safety belt is generally adopted at present to eliminate the gap, when the collision reaches a certain degree, the pre-tightening device is started, the belt buckle retracts or the retractor rotates, so that the slack of the webbing of the safety belt is reduced, the gaps between a human body and the safety belt and between seats are eliminated, and the restraint effect of the safety belt is improved.

The pretensioning safety belt is usually formed by adding a pre-tightening device to a traditional safety belt, wherein the pre-tightening device can be connected with a buckle or combined with a retractor.

The commonly used pre-tightening safety belt only can realize the pre-tightening function of the shoulder belt through a set of retractor and a pre-tightening device, so that the restraint on the hip of the passenger is insufficient, and the performance is poor. To achieve better performance double-ended pretensioning, either an anchor/latch pretensioner needs to be added or a set of spools needs to be added.

The double-head pre-tightening in any mode is complex in product structure, so that the product is high in cost, large in volume and weight and difficult to popularize. How to realize better pre-tightening performance on the premise of controlling cost, volume and weight is a big subject for restricting the development of the system products.

Disclosure of Invention

In order to solve the technical problems, the invention provides a double-head pre-tightening type automobile safety belt, which comprises a braid, a pre-tightening device shell, a piston, a braid reel, a pre-tightening rack, a driving gear and a power generation device, wherein one end of the braid is connected with a safety belt lock catch, the other end of the braid is connected with the piston, the pre-tightening rack, the driving gear and the power generation device are all positioned in the pre-tightening device shell, one end of the piston, which is far away from the braid, is attached to the end face of the pre-tightening rack, the pre-tightening rack is meshed with the driving gear, and the braid reel is fixedly connected with the driving gear and can rotate along with the rotation of the driving gear.

Further, a power generation cabin, a power driving chamber, a piston cabin and a driving gear cabin are arranged in the pretensioner shell, the power generation cabin is communicated with the power driving chamber, the piston is arranged in the piston cabin and can reciprocate in the piston cabin, and the driving gear is pivotally connected in the driving gear cabin.

Further, the power generation device is a gas generator, and the gas generator is arranged in the power generation cabin.

Further, the pretension rack comprises a first bridge pier, a second bridge pier, a first bridge web and a bridge deck, wherein the first bridge pier, the second bridge pier and the bridge deck are tightly attached to the pretensioner shell, and the first bridge web is a rack meshed with the driving gear.

Further, the pre-tightening rack further comprises a second bridge, wherein the second bridge is a smooth surface and is connected with the first bridge into a whole.

Further, the double-end pre-tightening type automobile safety belt further comprises a inhaul cable, and the inhaul cable is connected between the webbing and the piston.

Further, the double-end pre-tightening type automobile safety belt further comprises a guy rope guiding mechanism used for guiding the guy rope to change direction, and the guy rope guiding mechanism is bypassed in the middle of the guy rope.

By adopting the double-end pre-tightening type automobile safety belt provided by the invention, through ingenious structural design, the belt can be pulled back and simultaneously driven to rotate by pushing the driving gear in the process of pushing the piston to move by high-pressure gas, so that the belt reel is driven to rotate, the cost, the volume and the weight of the single-reel single pre-tightening device are kept, the function of the double-end pre-tightening safety belt is realized, and the cost, the weight and the volume of the double-end pre-tightening safety belt are greatly reduced.

Drawings

Fig. 1 is a schematic structural view of a double-ended pretensioned automobile seat belt according to the present embodiment.

Fig. 2 is a schematic view of the distribution of the compartments within the pretensioner housing.

Fig. 3 is a schematic view of the structure of the pretensioned rack.

Reference numerals illustrate:

1. the ribbon, 2, the cable, 3, the cable guiding mechanism, 4, pretensioner casing, 41, power generation cabin, 42, power driving room, 43, piston cabin, 44, drive gear cabin, 5, piston, 6, ribbon spool, 7, pretension rack, 71, first pier, 72, second pier, 73, first bridge, 74, second bridge, 75, bridge deck, 8, drive gear, 9, gas generator.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1, the double-headed pretensioned automobile safety belt of the present embodiment includes a webbing 1, a cable 2, a pretensioner housing 4, a piston 5, a webbing spool 6, a pretensioning rack 7, and a drive gear 8, wherein the cable 2 is used to pull the webbing 1 under the pushing of high-pressure gas, thereby realizing the function of belt pretensioning.

In order to be able to withstand large loads, the cable 2 in this embodiment is preferably a steel cable. One end of the inhaul cable 2 is fixedly connected with the braid 1, and the other end is fixedly connected with the piston 5.

The webbing spool 6 is fixedly connected with the drive gear 8, in this embodiment both are coaxially fixed, and the webbing spool 6 can rotate with the rotation of the drive gear 8. The webbing spool 6 is wound with webbing, and when the pretensioning device works, the linear motion of the piston 5 is converted into rotation of the webbing spool 6, so that the webbing is pulled back to achieve the function of pretensioning the shoulder strap.

Referring to fig. 2, the pretensioner housing 4 is internally provided with four compartments for the power generation device and the work place of the power transmission device of the whole pretensioner mechanism: a power generation compartment 41, a power drive compartment 42, a piston compartment 43 and a drive gear compartment 44. The piston 5, the pretensioning rack 7, the drive gear 8 and the power generating means are all located in the pretensioner housing, the piston 5 being reciprocable in a piston compartment 43, the drive gear 8 being pivotally connected in the drive gear compartment 44. In order to make the movement of the piston 5 smooth, the end surface of the piston 5 matched with the pre-tightening rack 7 is designed to be a plane, and the two are closely attached.

Referring to fig. 2, as the power generation device, the present embodiment further includes a gas generator 9, the gas generator 9 is disposed in a power generation compartment 41, and the power generation compartment 41 communicates with a power driving chamber 42. When an emergency situation is met, the gas generator 9 is ignited, high-pressure gas generated by gunpowder explosion rapidly fills the power driving chamber 42, and the piston 5 moves rightwards under the pushing of the high-pressure gas, so that a pre-tightening function is realized.

Referring to fig. 3, the pretensioning rack 7 as a power transmission device includes a first bridge pier 71, a second bridge pier 72, a first bridge pier 73, and a bridge deck 75, and in order to make the pretensioning rack 7 move smoothly, portions of the first bridge pier 71, the second bridge pier 72, and the bridge deck 75 that mate with the pretensioner housing 4 are designed to have smooth surfaces and closely fit with the pretensioner housing 4. The first bridge 73 is a rack engaged with the drive gear 8, and converts the linear motion of the pretensioned rack 7 into the rotational motion of the drive gear 8.

In order to prevent the normal pulling out of the seat belt when the pretensioning function is not activated, the pretensioning rack 7 of the present embodiment further comprises a second web 74, the second web 74 being designed as a smooth surface and being integral with the first web 73. The drive gear 8 is pivotally connected within the gear compartment 44 with one tooth abutting the transition junction of the first bridge web 73 and the second bridge web 74. When the pretensioning function is not triggered, the driving gear 8 is in contact with the second bridge 74, and the driving gear 8 can freely rotate due to the fact that the second bridge 74 is of a smooth surface, and normal pulling-out of the safety belt is guaranteed.

Referring to fig. 1, in order to guide the direction of the cable 2 and make the cable 2 stretch and retract along the movement direction of the piston 5, the embodiment further includes a cable guide mechanism 3, the cable guide mechanism 3 is fixed on the sheet metal of the vehicle body through a plurality of anchor points (not shown), and the middle part of the cable 2 bypasses the cable guide mechanism 3.

In summary, according to the double-end pre-tightening type automobile safety belt of the embodiment, on the basis of the traditional safety belt, by adding the pre-tightening device, the driving gear is pushed to rotate while the webbing is pulled back, so that the webbing reel is driven to rotate, the function of double-end pre-tightening the safety belt is realized while the cost, the volume and the weight of the single-reel single pre-tightening device are kept approximately, and the cost, the weight and the volume of the double-end pre-tightening safety belt are greatly reduced.

It should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the invention.

While the foregoing is directed to the preferred embodiments of the present invention, it should be noted that modifications and variations could be made by those skilled in the art without departing from the principles of the present invention, and such modifications and variations are to be regarded as being within the scope of the invention.

Claims

1. The utility model provides a double-end pretension formula car safety belt, its characterized in that, including meshbelt (1), pretension ware casing (4), piston (5), meshbelt spool (6), pretension rack (7), drive gear (8) and power generation facility, the one end fixed connection of meshbelt (1) in meshbelt spool (6), the other end with piston (5) fixed connection, piston (5), pretension rack (7), drive gear (8) and power generation facility all are located in pretension ware casing (4), one end that meshbelt (1) was kept away from to piston (5) with the terminal surface laminating of pretension rack (7), pretension rack (7) with drive gear (8) meshing, meshbelt spool (6) with drive gear (8) fixed connection just can rotate along with the rotation of drive gear (8), pretension rack (7) have smooth surface, when the pretension function of double-end pretension formula car safety belt does not trigger, drive gear (8) and can rotate smooth surface smoothly.

2. The double-ended pretensioned automobile safety belt according to claim 1, characterized in that a power generation cabin (41), a power driving chamber (42), a piston cabin (43) and a driving gear cabin (44) are arranged inside the pretensioner housing (4), the power generation cabin (41) is communicated with the power driving chamber (42), the piston (5) is arranged in the piston cabin (43) and can reciprocate in the piston cabin (43), and the driving gear (8) is pivotally connected in the driving gear cabin (44).

3. The double-ended pretensioned automobile safety belt according to claim 2, characterized in that the power generating device is a gas generator (9), the gas generator (9) being placed in the power generating compartment (41).

4. The double-ended pretensioned car seat belt according to claim 1, characterized in that the pretensioned rack (7) comprises a first bridge pier (71), a second bridge pier (72), a first bridge pier (73) and a bridge deck (75), the first bridge pier (71), the second bridge pier (72) and the bridge deck (75) are tightly attached to the pretensioner housing (4), and the first bridge pier (73) is a rack meshed with the driving gear (8).

5. The double-ended pretensioned car seat belt according to claim 4, characterized in that the pretensioned rack (7) further comprises a second web (74), the second web (74) being a smooth surface and being integral with the first web (73).

6. The double-ended pretensioned car seat belt according to claim 1, further comprising a cable (2), the cable (2) being connected between the webbing (1) and the piston (5).

7. The double-ended pretensioned automobile seat belt according to claim 6, further comprising a cable guide mechanism (3) for guiding the direction change of the cable (2), the cable guide mechanism (3) being bypassed in the middle of the cable (2).