Automatic tightener for automobile safety belt

Abstract

The utility model relates to the technical field of safety belts, in particular to an automatic tightener for an automobile safety belt, which comprises a mounting frame, a winding shaft for winding the safety belt is arranged in the middle of the mounting frame, two ends of the winding shaft are fixedly connected with connecting shafts, and the connecting shafts at two ends are butted with elastic winding mechanisms. Clamping pieces are arranged at the connecting positions of the two ends of the winding shaft and the connecting shaft, each clamping piece comprises a fixing ring fixedly connected with the connecting shaft, a plurality of clamping parts are arranged on the outer side of each fixing ring at equal intervals, and each clamping part comprises a connecting block and a clamping block in butt joint with the connecting block in a matched mode; the connecting block and the clamping block which are separately arranged are adopted, the clamping block is relatively separated from the connecting block under the action of centrifugal force generated when the winding shaft rotates too fast and abuts against the clamping teeth in a matched mode to achieve braking, and compared with an existing mode of adopting a gunpowder inflation device, the gunpowder inflation device is high in reliability and capable of being used for a long time, and the service life of the gunpowder inflation device is prolonged. And the use cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of safety belt, concretely is a kind of automobile safety belt automatic tightener. BACKGROUND

[0002] With the rapid development of automobile industry, people pay more and more attention to the safety performance of automobile. In traffic accidents, safety belt is an important device to protect the life safety of driver and passenger. However, most of the existing automobile safety belts have some problems, that is, the protection effect of safety belt is not ideal when emergency braking or collision.

[0003] At present, a kind of automobile safety belt automatic tightener using powder charge inflation mode appears in the market. The technology rapidly pushes the tightening device by high-pressure gas generated by powder combustion, so that the safety belt is tightened in an instant, thereby improving the safety of driver and passenger in the accident. However, the reliability of powder charge inflation device is poor, and the powder may be damp and deteriorated during long-term use, resulting in unstable inflation effect. The use cost of powder charge inflation device is high, and the powder charge inflation device needs to be checked regularly and replaced, which increases the use cost.

[0004] Therefore, it is necessary to improve the above problems by providing an automobile safety belt automatic tightener. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing an automobile safety belt automatic tightener to solve the problems in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] An automobile safety belt automatic tightener comprises a mounting frame, a winding shaft for winding a safety belt is arranged in the middle of the mounting frame, a connecting shaft is fixedly connected to both ends of the winding shaft, an elastic winding mechanism is butt-jointed to both ends of the connecting shaft, a clamping piece is arranged at the connection between both ends of the winding shaft and the connecting shaft, the clamping piece comprises a fixed ring fixedly connected to the connecting shaft, a plurality of clamping portions are equidistantly arranged on the outer side of the fixed ring, the clamping portion comprises a connecting block and a clamping block butt-jointed to the connecting block, a fixed ring is fixedly connected to both sides of the inside of the mounting frame, and a plurality of clamping teeth are equidistantly arranged on the inner side of the fixed ring, the clamping block is separated from the connecting block under the rapid rotation of the winding shaft, and abuts against the clamping teeth to realize emergency braking.

[0008] As a preferred scheme of the utility model, an installation cavity is formed in the end of the connecting block, a sliding groove is formed in both sides of the installation cavity, a butt-joint end fixedly connected to the installation cavity is fixedly connected to the end of the clamping block, a sliding block is fixedly connected to both sides of the butt-joint end, and the sliding block is slidingly arranged in the sliding groove. The sliding block is limited and prevented from falling off by the top of the sliding groove.

[0009] As the preferred scheme of the utility model, the bottom end of the butt joint end is connected with the bottom surface of the mounting cavity with a micro spring.

[0010] As the preferred scheme of the utility model, the size of the butt joint end is less than the internal size of the mounting cavity.

[0011] As the preferred scheme of the utility model, the elastic winding mechanism comprises an end cover fixedly connected with the outer side surface of the mounting frame, and a coil spring is connected between the end cover and the connecting shaft.

[0012] As the preferred scheme of the utility model, the two ends of the winding shaft are fixedly connected with butt joint rings, and the butt joint rings on the two sides are respectively matched with the fixed rings on the two sides in butt joint, and the butt joint rings are rotatably connected with the fixed rings.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The utility model adopts the connecting block and the clamping block which are separately arranged, the clamping block is relatively separated from the connecting block under the centrifugal force generated when the winding shaft rotates too fast, and is matched with the clamping tooth to realize braking, and compared with the existing way of adopting the powder inflation device, the utility model has high reliability, can be used for a long time, and reduces the use cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the first perspective view of the utility model;

[0016] Figure 2 It is the second perspective view of the utility model;

[0017] Figure 3 It is the top view of the utility model;

[0018] Figure 4 It is the utility model Figure 3 It is the section view at A-A of the utility model;

[0019] Figure 5 It is the utility model Figure 3 It is the section view at B-B of the utility model;

[0020] Figure 6 It is the utility model Figure 4 It is the enlarged view of A of the utility model.

[0021] In the drawing: mounting frame 1, end cover 2, winding shaft 3, butt joint ring 4, fixed ring 5, clamping tooth 6, connecting shaft 7, coil spring 8, clamping block 9, connecting block 10, micro spring 11, mounting cavity 12, sliding block 13, butt joint end 14. DETAILED DESCRIPTION

[0022] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments, and based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related. Several embodiments of the present application are given. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being "fixedly attached" to another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar terms as used herein are for the purpose of description only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0026] Please refer to Figures 1-6 , the present application provides a technical scheme:

[0027] Embodiments, please refer to Figure 1 , 2 , 3, 4, 5 and 6, an automatic belt tightener of automobile safety belt, comprising a mounting frame 1, the middle part of the mounting frame 1 is provided with a winding shaft 3 for winding the safety belt, both ends of the winding shaft 3 are fixedly connected with connecting shafts 7, both ends of the connecting shafts 7 are butted with elastic winding mechanisms, the connecting parts of both ends of the winding shaft 3 and the connecting shafts 7 are provided with clamping pieces, the clamping pieces comprise fixed rings fixedly connected with the connecting shafts 7, the outer side of the fixed rings is provided with a plurality of clamping parts at equal intervals, the clamping parts comprise connecting blocks 10 and clamping blocks 9 butted with the connecting blocks 10, both sides of the inside of the mounting frame 1 are fixedly connected with fixed rings 5, and the inner side of the fixed rings 5 is provided with a plurality of clamping teeth 6 at equal intervals, the clamping blocks 9 are separated from the connecting blocks 10 under the rapid rotation of the winding shaft 3, and abut with the clamping teeth 6 to realize emergency braking.

[0028] The winding shaft 3 is used for winding and storing the safety belt, the winding force is provided by the elastic winding mechanism at both ends, when the winding shaft 3 rotates suddenly at a high speed in use, the centrifugal force is generated, the clamping block 9 is separated from the connecting block 10 by the centrifugal force, the separated clamping block 9 is abutted with the clamping tooth 6 to realize the emergency brake.

[0029] Please refer to Figure 3 and 6 The end of the connecting block 10 is provided with the mounting cavity 12, the both sides of the mounting cavity 12 are provided with the sliding groove, the end of the clamping block 9 is fixedly connected with the butt joint end 14 which is matched with the mounting cavity 12, the both sides of the butt joint end 14 are fixedly connected with the sliding block 13 which is slidingly arranged in the sliding groove, the sliding block 13 is limited and prevented from being separated by the top end of the sliding groove, the bottom end of the butt joint end 14 is connected with the bottom surface of the mounting cavity 12 through the micro spring 11, and the size of the butt joint end 14 is smaller than the internal size of the mounting cavity 12.

[0030] When the centrifugal force is generated, the butt joint end 14 is acted on by the centrifugal force, is displaced outwardly against the action force of the micro spring 11, is moved in the mounting cavity 12 in the displacement process, the sliding block 13 is limited and prevented from being separated by the top end of the sliding groove, and the end of the displaced clamping block 9 is abutted with the clamping tooth 6 to realize the emergency brake.

[0031] Please refer to Figure 1 、 2 and 3, the elastic winding mechanism comprises the end cover 2 which is fixedly connected with the outer side of the mounting frame 1, the end cover 2 is connected with the connecting shaft 7 through the winding spring 8, the both ends of the winding shaft 3 are fixedly connected with the butt joint ring 4, the both sides of the butt joint ring 4 are matched with the both sides of the fixed ring 5 in abutment, and the butt joint ring 4 is rotatably connected with the fixed ring 5, and the power of winding the safety belt is provided through the winding spring 8.

[0032] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic belt tightener for a vehicle, comprising a mounting frame (1), a winding shaft (3) for winding a safety belt is arranged in the middle of the mounting frame (1), and a connecting shaft (7) is fixedly connected to both ends of the winding shaft (3), and an elastic winding mechanism is butted to both ends of the connecting shaft (7), characterized in that: Both ends of the winding shaft (3) are provided with a clamping part, which comprises a fixed ring fixedly connected with the connecting shaft (7), and the outer side of the fixed ring is provided with a plurality of clamping parts at equal intervals, and the clamping part comprises a connecting block (10) and a clamping block (9) matched with the connecting block (10), both sides of the inside of the mounting frame (1) are fixedly connected with a fixed ring (5), and the inner side of the fixed ring (5) is provided with a plurality of clamping teeth (6) at equal intervals, and the clamping block (9) is separated from the connecting block (10) under the rapid rotation of the winding shaft (3) and is matched with the clamping teeth (6) to realize emergency braking.

2. The automotive belt automatic retractor according to claim 1, characterized in that: The end of the connecting block (10) is provided with a mounting cavity (12), and the both sides of the mounting cavity (12) are provided with a sliding groove, the end of the clamping block (9) is fixedly connected with a butt joint end (14) matched with the mounting cavity (12), the both sides of the butt joint end (14) are fixedly connected with a sliding block (13), and the sliding block (13) is slidingly arranged in the sliding groove, and the sliding block (13) is limited from being separated by the top end of the sliding groove.

3. The automotive belt automatic retractor according to claim 2, characterized in that: The bottom end of the butt joint end (14) is connected with the bottom surface of the mounting cavity (12) through a micro spring (11).

4. The automotive belt automatic retractor according to claim 3, characterized in that: The size of the butt joint end (14) is smaller than the internal size of the mounting cavity (12).

5. The automotive belt automatic retractor according to any one of claims 1 to 4, characterized in that: The elastic winding mechanism comprises an end cover (2) fixedly connected with the outer side of the mounting frame (1), and a winding spring (8) is connected between the end cover (2) and the connecting shaft (7).

6. The automotive belt automatic retractor according to claim 5, characterized in that: Both ends of the winding shaft (3) are fixedly connected with a butt joint ring (4), and the butt joint rings (4) on both sides are matched with the fixed rings (5) on both sides, and the butt joint ring (4) is rotatably connected with the fixed ring (5).

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