Safety air curtain hoop tightening device

Abstract

The utility model relates to the technical field of safety air bags, in particular to a safety air curtain hoop tightening device which comprises a machine body and a frame seat installed in the machine body, a first air cylinder is fixedly installed on the top of the frame seat, two sets of tightening seats are arranged in the frame seat, a cavity is formed in one side of each tightening seat, and a sliding block is installed in each cavity in a sliding mode. A trapezoidal groove is formed in the sliding block, an electric push rod is installed at the bottom of the sliding block, multiple sets of moving blocks are slidably installed on the other side of the tightening base, and clamping heads are installed at the top ends of the multiple sets of moving blocks. After the tightening seat at the top gradually makes contact with the tightening seat at the bottom, an electric push rod is used for driving a sliding block to move in a cavity, a trapezoidal groove in the sliding block drives a plurality of sets of movable blocks to move at the same time, finally, a movable clamping head is used for acting on a hoop at the same time to complete tightening, and the tightened clamping ring is still kept in a regular circle state; the air leakage phenomenon after the air curtain is detonated is effectively restrained, and it is guaranteed that the pressure maintaining function of the air curtain is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of airbag, in particular to a safety air curtain clamp tightening device. Background Art

[0002] A safety air curtain, also known as a curtain airbag CAB, is installed on the top of an automobile. The CAB assembly is composed of an airbag, an airbag wrapping cloth, a gas generator, a gas generator bracket and a conduit. When a side collision of the automobile reaches the condition for the airbag to deploy, during the processing of the curtain airbag, the CAB airbag and the CAB generator clamp are pre-assembled manually and loaded into the equipment jig, and the equipment automatically sends the CAB airbag assembly into the clamp tightening device for tightening.

[0003] In the prior art, for example, the patent with the publication number CN204296640U discloses an airbag assembly of a front airbag device, which includes an upper layer airbag cloth, a lower layer airbag cloth and a pull belt arranged between the upper layer airbag cloth and the lower layer airbag cloth. The upper layer airbag cloth and the lower layer airbag cloth are connected at the edges by sewing threads, and the pull belt is also connected with the upper layer airbag cloth and the lower layer airbag cloth.

[0004] The above structure uses sewing thread tightening to ensure the shaping of the air curtain airbag. In addition, the conventional tightening method also uses squeezing the clamp ear to tighten the clamp, resulting in only two force application points. After the clamp is tightened, the shape is not a regular circle, and the air curtain airbag cannot be pressure maintained. Content of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide a safety air curtain clamp tightening device to solve the problem that there are only two force application points during the tightening process of the clamp, resulting in the shape of the clamp not being a regular circle after being tightened and unable to maintain pressure on the air curtain airbag.

[0006] Based on the above purpose, the present utility model provides a safety air curtain clamp tightening device, which includes a machine body and a frame seat installed in the machine body. A first cylinder is fixedly installed on the top of the frame seat, and two groups of tightening seats are arranged in the frame seat. The top of one group of tightening seats is fixedly connected with the output end of the first cylinder, and the bottom of the other group of tightening seats is fixedly installed on the frame seat; Spring seats are installed on both sides of the tightening seat on the frame seat, and a clamp is fixedly installed at the top of the spring seat. The clamp and the tightening seat are used for clamping the airbag assembly. A second cylinder is installed in the frame seat on one side of the adjacent tightening seat, and a contact head is fixedly installed at the output end of the second cylinder. The contact head abuts against the clamp.

[0007] One side of the tightening seat is provided with a cavity, a sliding block is slidably installed in the cavity, a trapezoidal groove is formed in the sliding block, and an electric push rod is installed at the bottom of the sliding block. On the other side of the tightening seat, a plurality of moving blocks are slidably installed. Clamping heads are installed at the tops of the plurality of moving blocks, and the ends of the moving blocks abut against the trapezoidal groove.

[0008] Preferably, a guide rail rod is installed at the top of the tightening seat at the output end of the first cylinder, and the guide rail rod penetrates through the top of the frame seat.

[0009] Preferably, corresponding clamping posts and sliding grooves are respectively arranged inside the cavity and the sliding block, and the clamping posts penetrate through the sliding grooves.

[0010] Preferably, there are at least four moving blocks, and the moving blocks are equidistantly distributed inside the tightening seat, and the ends of the moving blocks correspond to the inclined surfaces of the trapezoidal groove.

[0011] Preferably, corresponding limiting grooves and cylinders are respectively arranged inside the moving block and the tightening seat, the cylinder penetrates through the limiting groove, and a spring is installed between the limiting groove and the cylinder.

[0012] Preferably, the clamping head and the moving block are correspondingly arranged, and the top end of the clamping head is arc-shaped.

[0013] The beneficial effects of the present utility model: When the tightening seat at the top gradually contacts the tightening seat at the bottom, the electric push rod is used to drive the sliding block to move inside the cavity, the trapezoidal groove in the sliding block drives a plurality of moving blocks to move simultaneously, and finally the moving clamping heads act on the clamp at the same time to complete the tightening, forming a regular circle, so that the tightened snap ring still maintains the state of a regular circle, effectively curbing the air leakage phenomenon after the air curtain detonates, and ensuring the realization of the pressure maintaining function of the air curtain. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the whole of the present utility model;

[0016] Figure 2 It is a three-dimensional structure schematic diagram of the frame seat of the present utility model;

[0017] Figure 3 It is a half-sectional three-dimensional structure schematic diagram of the frame seat of the present utility model;

[0018] Figure 4 Schematic diagram of the half-sectional plane structure of the frame seat of the present utility model;;

[0019] Figure 5 Of the present utility model Figure 4 Enlarged schematic diagram of part A in the present utility model.

[0020] The markings in the figure are: 1, the body; 2, the frame seat; 3, the first cylinder; 4, the tightening seat; 5, the guide rail rod; 6, the spring seat; 7, the fixture; 8, the cavity; 9, the sliding block; 10, the trapezoidal groove; 11, the moving block; 12, the clamping head; 13, the limiting groove; 14, the cylinder; 15, the spring; 16, the clamping column; 17, the sliding groove; 18, the second cylinder; 19, the abutting head; 20, the electric push rod. Specific embodiments

[0021] To make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with specific embodiments.

[0022] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, a safety airbag clamp tightening device includes a body 1 and a frame seat 2 installed inside the body 1. A first cylinder 3 is fixedly installed on the top of the frame seat 2, and two sets of tightening seats 4 are arranged inside the frame seat 2. The top of one set of tightening seats 4 is fixedly connected to the output end of the first cylinder 3, and the bottom of the other set of tightening seats 4 is fixedly installed on the frame seat 2; Spring seats 6 are installed on both sides of the tightening seat 4 on the frame seat 2, and a fixture 7 is fixedly installed at the top of the spring seat 6. The fixture 7 and the tightening seat 4 are used to clamp the airbag assembly. A second cylinder 18 is installed inside the frame seat 2 on one side of the adjacent tightening seat 4. The output end of the second cylinder 18 is connected to an abutting head 19, and the abutting head 19 abuts against the clamp.

[0023] A cavity 8 is opened on one side of the tightening seat 4. A sliding block 9 is slidably installed inside the cavity 8. A trapezoidal groove 10 is opened on the sliding block 9, and an electric push rod 20 is installed at the bottom of the sliding block 9. A plurality of groups of moving blocks 11 are slidably installed on the other side of the tightening seat 4. The tops of the plurality of groups of moving blocks 11 are installed with clamping heads 12, and the ends of the moving blocks 11 abut against the trapezoidal groove 10.

[0024] In this embodiment, the airbag and air curtain are placed in the fixture 7 on the spring seat 6, ensuring that the clamp outside the air curtain is located in the tightening seat 4 on the frame seat 2. Then, the first cylinder 3 drives the tightening seat 4 at the top to move downward. During the movement, the second cylinder 18 pushes the contact head 19 to always contact the outside of the clamp. When the tightening seat 4 at the top gradually contacts the tightening seat 4 at the bottom, the contact head 19 resets. The electric push rod 20 is used to drive the sliding block 9 to move inside the cavity 8. The trapezoidal groove 10 in the sliding block 9 drives multiple moving blocks 11 to move simultaneously. Finally, the moving clamping heads 12 are used to tighten the clamp simultaneously to form a regular circle.

[0025] As an embodiment, as Figure 2 , Figure 3 shown, a guide rail rod 5 is installed at the top of the tightening seat 4 at the output end of the first cylinder 3, and the guide rail rod 5 penetrates through the top of the frame seat 2.

[0026] In this embodiment, through the setting of the guide rail rod 5, it is ensured that the first cylinder 3 drives the tightening seat 4 to move vertically downward, so that the tightening seat 4 at the top corresponds to the tightening seat 4 on the frame seat 2, and the closing of the clamp is completed.

[0027] As an embodiment, as Figure 3 , Figure 4 and Figure 5 shown, corresponding clamping posts 16 and sliding grooves 17 are respectively arranged inside the cavity 8 and inside the sliding block 9, and the clamping post 16 penetrates through the sliding groove 17.

[0028] In this embodiment, when the sliding block 9 in the tightening seat 4 moves, by using the sliding groove 17 opened in the sliding block 9, the sliding block 9 moves upward under the action of the clamping post 16 in the cavity 8, ensuring the uniform tightening degree of multiple moving blocks 11 upward.

[0029] As an embodiment, as Figure 4 and Figure 5 shown, there are at least four moving blocks 11, and the moving blocks 11 are equally spaced inside the tightening seat 4, and the ends of the moving blocks 11 correspond to the inclined surfaces of the trapezoidal groove 10.

[0030] In this embodiment, multiple moving blocks 11 move simultaneously to maintain the uniformity during the tightening process, and the inclined surface of the trapezoidal groove 10 can push the moving blocks 11 to tighten inward to a degree close to a circle, keeping the tightening direction and force unchanged.

[0031] As an embodiment, as Figure 5 shown, corresponding limit grooves 13 and cylinders 14 are respectively arranged inside the moving block 11 and inside the tightening seat 4, the cylinder 14 penetrates through the limit groove 13, and a spring 15 is installed between the limit groove 13 and the cylinder 14.

[0032] In this embodiment, when the electric push rod 20 drives the sliding block 9 to move inside the cavity 8, and the trapezoidal groove 10 in the sliding block 9 drives multiple moving blocks 11 to move, the spring 15 inside the limiting groove 13 is used to slow down the moving amplitude of the moving blocks 11. When the clamping heads 12 contact the clamp simultaneously, buffering is performed to avoid excessive movement and causing local tightening of the clamp.

[0033] As an embodiment, as Figure 1 , Figure 2 and Figure 3 shown, the clamping heads 12 and the moving blocks 11 are correspondingly arranged, and the top ends of the clamping heads 12 are arc-shaped.

[0034] In this embodiment, through the combined tightening of multiple moving blocks 11 and the clamping heads 12 at the same time, and the better fitting of the arc-shaped clamping heads 12 to the clamp, the tightened clamp still maintains a regular circular state, effectively curbing the air leakage phenomenon after the air curtain detonates.

[0035] Working principle: During use, place the airbag air curtain in the fixture 7 on the spring seat 6, ensure that the clamp outside the air curtain is located in the tightening seat 4 on the frame seat 2, and then drive the tightening seat 4 at the top to move downward through the first cylinder 3. During the moving process, the second cylinder 18 pushes the contact head 19 to always contact the outside of the clamp. When the tightening seat 4 at the top gradually contacts the tightening seat 4 at the bottom, the contact head 19 resets; use the electric push rod 20 to drive the sliding block 9 to move inside the cavity 8, and the trapezoidal groove 10 in the sliding block 9 drives multiple moving blocks 11 to move simultaneously. During the moving process, use the spring 15 inside the limiting groove 13 to slow down the moving amplitude of the moving blocks 11, and the inclined surface of the trapezoidal groove 10 can push the moving blocks 11 to move inward to an extent close to a circle, keeping the tightening direction and force unchanged. Finally, use the moving clamping heads 12 to act on the clamp simultaneously to complete the tightening, forming a regular circle, effectively curbing the air leakage phenomenon after the air curtain detonates, and ensuring the realization of the pressure maintaining function of the air curtain.

[0036] Those of ordinary skill in the art should understand that the discussion of any above embodiment is only exemplary, and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0037] The present invention aims to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A safety air curtain clamp tightening device, comprising a body (1) and a frame seat (2) installed in the body (1), characterized in that: A first cylinder (3) is fixedly mounted on the top of the frame seat (2), and two sets of tightening seats (4) are arranged inside the frame seat (2), wherein the top of one set of tightening seats (4) is fixedly connected to the output end of the first cylinder (3), and the bottom of the other set of tightening seats (4) is fixedly mounted on the frame seat (2); Both sides of the tightening seat (4) are provided with spring seats (6) on the frame seat (2); a clamp (7) is fixedly installed on the top of the spring seat (6); the clamp (7) and the tightening seat (4) are used to clamp the air bag assembly; a second cylinder (18) is installed in the frame seat (2) on one side adjacent to the tightening seat (4); a contact head (19) is fixedly installed on the output end of the second cylinder (18); the contact head (19) abuts against the clamp; A cavity (8) is provided on one side of the tightening seat (4), a sliding block (9) is slidably mounted in the cavity (8), a trapezoidal groove (10) is provided on the sliding block (9), and an electric push rod (20) is mounted at the bottom of the sliding block (9), and a plurality of groups of moving blocks (11) are slidably mounted on the other side of the tightening seat (4), a clamping head (12) is mounted on the top of the plurality of groups of moving blocks (11), and the ends of the moving blocks (11) abut against the trapezoidal groove (10).

2. A safety air curtain clamp tightening device according to claim 1, characterized in that: A guide rail rod (5) is installed on the top of the tightening seat (4) at the output end of the first cylinder (3), and the guide rail rod (5) passes through the top of the frame seat (2).

3. The safety air curtain clamp tightening device according to claim 1, characterized in that: Corresponding clamping columns (16) and sliding grooves (17) are respectively arranged inside the cavity (8) and inside the sliding block (9), and the clamping columns (16) penetrate the sliding grooves (17).

4. The safety air curtain clamp tightening device according to claim 1, characterized in that: The moving blocks (11) are at least four groups, and the moving blocks (11) are evenly distributed inside the tightening seat (4), and the ends of the moving blocks (11) correspond to the inclined surfaces of the trapezoidal grooves (10).

5. The safety air curtain clamp tightening device according to claim 1, characterized in that: The interior of the moving block (11) and the interior of the tightening seat (4) are respectively provided with corresponding limiting grooves (13) and cylinders (14); the cylinder (14) passes through the limiting groove (13); and a spring (15) is installed between the limiting groove (13) and the cylinder (14).

6. The safety air curtain clamp tightening device according to claim 1, characterized in that: The clamping head (12) and the moving block (11) are arranged correspondingly, and the top end of the clamping head (12) is arranged in an arc shape.

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