CN102303579A - Locking fluted disc used for safety belt retractor - Google Patents

Abstract

The invention relates to a locking fluted disc used for a safety belt retractor. The locking fluted disc comprises a fluted disc, an inertia counterweight block which is installed on the fluted disc and rotates along the fluted disc, and an elastic part which keeps the inertia counterweight block in an untriggered and locked position, wherein at least three fixing blocks which enable the elastic part to bend in an arc shape are arranged at the fixed mounting end of the elastic part. The locking fluted disc used for the safety belt retractor, provided by the invention, has the advantages that by adopting a three-point fixing method, the three fixing blocks and the fluted disc adopt an integrated structure, the assembly of the elastic part is facilitated with higher efficiency and is time saving and labor saving, the elastic part can be reliably fixed after the assembly and can provide appropriate magnitude of pressure specific to the inertia counterweight block to prevent lock triggering when the inertia counterweight block is drawn out at a low speed, and meanwhile, the service life is prolonged.

Description

Locking sprocket for seat belt retractor

technical field

The invention relates to the technical field of vehicle safety belts, in particular to a locking chainring for a safety belt retractor.

Background technique

"Safety" has become the primary consideration for drivers and passengers, and it is also one of the most important performances of cars. Seat belts are the basic protective devices to protect drivers and passengers during vehicle collisions. The ideal process of seat belts is: First of all, tighten it in time, and "press" the person on the seat without hesitation at the first moment of the accident; then, relax moderately, until the peak of the impact force has passed, or when the person has been protected by the airbag, it will be appropriate. Relax your seat belt. This can avoid rib injury due to excessive tension. The most advanced seat belts have pretensioners and tension limiters.

When we wear a seat belt, if the seat belt is pulled out quickly, it will be locked and can only be pulled out slowly; and if the seat belt is pulled out quickly with the occupant moving forward when the vehicle collides, the seat belt will be locked at this time , to protect the occupants from colliding with the steering wheel, instrument panel and glass windows of the vehicle. After the peak of the impact force passes, the seat belt is unlocked and the seat belt is properly relaxed. This is the protection effect of the pull limiter. The locking chainring is the key device to realize the tension limiter of the vehicle seat belt. The locking chainring includes the chainring that rotates with the shrinkage of the safety webbing and the inertia counterweight installed on the chainring to follow the rotation of the chainring. The inertia counterweight There are locking teeth on the block. When the inertia weight is pulled out normally or slowly, it is pressed in the untriggered position by the elastic member, and the tooth plate can rotate freely with the safety webbing; when the occupant pulls out the safety webbing quickly or the vehicle collides, the safety webbing is When the force is pulled out quickly, the inertia counterweight overcomes the pressure of the elastic part and performs centrifugal movement under the action of acceleration, so that the locking tooth moves outward and locks the outer shell of the locking tooth plate, thereby realizing the locking of the safety webbing , after the peak value of the impact force passes or the tension decreases, the inertial weight is returned to the untriggered position by the action of the elastic member, at this time the safety webbing can be pulled out again to achieve a soft landing and protect the safety of the occupants.

Due to the limited space in the locking chainring, the installation and fixing method of the elastic member has always been a difficult technical problem in the industry. As shown in Figure 3 and Figure 4, the method used in the prior art is: a mounting hole is included, and a chuck for clamping the elastic member 3 is installed in the mounting hole. One end of the elastic member 3 is fixed, and the other end is pressed against the inertia weight. Make it in the untriggered locked state. Due to the small size of the whole device, precise equipment is required to install the chuck reliably in the installation hole, and manual inspection is required after installation. If the installation is misplaced, it is difficult to adjust, and it needs to be reworked, which is time-consuming and laborious.

Contents of the invention

The technical problem to be solved by the present invention is: for the deficiencies in the prior art, the present invention provides a locking chainring for a seat belt retractor, which has a simple structure, is easy to install, and can be assembled manually, saving time. Save effort.

The technical solution adopted by the present invention to solve the technical problem is: a locking toothed plate for a safety belt retractor, including a toothed plate, an inertia counterweight mounted on the toothed plate and rotating with the toothed plate and making the inertia The elastic piece with the counterweight in the non-triggered locking position, the fixed installation end of the elastic piece has at least three fixed blocks that make the elastic piece bend in an arc. According to the characteristics of the elastic member, one end of the elastic member is fixed, and the other end is press-fitted on the inertia configuration block, so that the inertia counterweight is in the untriggered locking position.

According to the characteristics of the elastic member, the number and layout of the fixed blocks are preferred. The three fixed blocks are respectively the first fixed block that is in contact with the inner surface of the arc at the bend of the elastic member, and the second fixed block that is located on both sides of the first fixed block. The second fixed block and the third fixed block are respectively located on the tangent plane of the outer circular arc surface of the bending part of the elastic part.

In order to prevent the elastic member from falling off, the upper ends of the second fixing block and the third fixing block specifically restrict the protrusions of the elastic member respectively.

In order to ensure reliable cooperation between the first fixing block and the bend of the elastic body, the first fixing block is cylindrical.

In order to make the structure compact and easy to install, the fixed block and the toothed plate are of an integrated structure. After adopting the integrated structure, the operation of installing the elastic body becomes simple and fast.

The elastic part is preferred, and the elastic part is a strip-shaped spring piece, which has a large elastic force range, fast reset speed and long service life.

The beneficial effect of the present invention is that the locking toothed plate used for the safety belt retractor of the present invention adopts a three-point fixing method, and the three fixing blocks and the toothed plate are in an integrated structure, which facilitates the assembly of the elastic parts and can be quickly assembled manually Complete, high efficiency, save time and effort, reduce equipment investment, reduce the cost burden of the enterprise, after assembly, the elastic parts can be fixed reliably, and the pressure of the appropriate size of the inertial weight can be provided to avoid the inertial weight when it is pulled out at a low speed. Trigger locking while extending service life.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic diagram of the front view of the preferred embodiment of the locking chainring for the seat belt retractor of the present invention;

Fig. 2 is a three-dimensional structural schematic view of the best embodiment of the locking chainring for the seat belt retractor of the present invention;

Fig. 3 is a front structural schematic view of the best embodiment of the locking chainring in the prior art;

Fig. 4 is a perspective view of the best embodiment of the locking chainring in the prior art.

In the figure: 1. chainring, 2. inertia weight, 3. elastic body, 4. first fixed block, 5. second fixed block, 6. third fixed block.

Detailed ways

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

Fig. 1 and Fig. 2 are a locking chainring for a safety belt retractor according to the present invention, including a toothing 1, an inertia weight 2 mounted on the chainring 1 and rotating with the chainring 1, and the inertia weight Block 2 is the elastic part 3 in the untriggered locking position. The fixed installation end of the elastic part 3 has three fixed blocks that make the elastic part 3 bend in an arc. The blocks are respectively the first fixed block 4 connected to the inner surface of the arc at the bend of the elastic member 3, the second fixed block 5 and the third fixed block 6 located on both sides of the first fixed block 4, the second fixed block 5 and the third fixed block 6. The third fixing blocks 6 are respectively located on the tangent planes of the outer circular arc surfaces at the bends of the elastic members 3 .

The upper ends of the second fixing block 5 and the third fixing block 6 specifically restrict the protrusions of the elastic member 3 respectively. This hook-shaped fixing block can reliably and effectively fix the elastic member 3 and is easy to disassemble.

In order to ensure reliable cooperation between the first fixed block and the bending part of the elastic body, the first fixed block 4 is cylindrical, and the position of the first fixed block 4 directly affects the elastic force of the elastic member 3, and the design needs to be based on the elasticity of the elastic member 3 The modulus works out the proper bend. During the use of the safety belt, the safety belt will not trigger the locking of the inertial weight 2 when the safety belt is pulled out below the safe speed; when the pulling out speed is higher than the safe speed, the inertial weight 2 is subjected to centrifugal force to overcome the force of the elastic member 3 The pressure is triggered, and the seat belt is locked through the locking teeth to protect the passengers. After the peak of the impact force passes or the tension decreases, the inertial weight 2 returns to the untriggered position under the pressure of the elastic member 3 , at this time, the safety belt can be pulled out at a speed lower than the safe speed, so as to realize a soft landing and protect the safety of the occupants.

The elastic member 3 is preferred, and the elastic member 3 is a strip-shaped spring piece, which has a large elastic force range, fast reset speed and long service life.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (6)

1. locking fluted disc that is used for Webbing retractor; Comprise fluted disc (1); Be installed in fluted disc (1) and go up and follow the seismic element piece (2) of fluted disc (1) rotation and seismic element piece (2) is in the elastic component (3) that does not trigger lock position, it is characterized in that: the fixed installation end of described elastic component (3) has at least three fixed blocks that make elastic component (3) camber bending.

2. the locking fluted disc that is used for Webbing retractor as claimed in claim 1; It is characterized in that: described fixed block quantity is three and is respectively with elastic component (3) bending part circular arc medial surface second fixed block (5) and the 3rd fixed block (6) that contacts bonded assembly first fixed block (4), is positioned at first fixed block (4) both sides that second fixed block (5) and the 3rd fixed block (6) lay respectively on the section of elastic component (3) bending part outer arc face.

3. the locking fluted disc that is used for Webbing retractor as claimed in claim 2 is characterized in that: second fixed block (5) and the concrete respectively projection that limits elastic component (3) in the upper end of the 3rd fixed block (6).

4. the locking fluted disc that is used for Webbing retractor as claimed in claim 2 is characterized in that: described first fixed block (4) is for cylindrical.

5. like claim 1 or 2 or the 3 or 4 described locking fluted discs that are used for Webbing retractor, it is characterized in that: described fixed block and fluted disc (1) are integral structure.

6. the locking fluted disc that is used for Webbing retractor as claimed in claim 1 or 2 is characterized in that: described elastic component (3) is the strip shape spring leaf.

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