CN215322441U - Force limiting structure of automobile safety belt - Google Patents

Abstract

The utility model relates to the technical field of safety belt winders, in particular to a force limiting structure of an automobile safety belt, which solves the defects that a limiting block is easy to deviate and has low connecting strength in the prior art, and comprises a force limiting rod main body, a first limiting block and a second limiting block which are respectively arranged at two ends of the force limiting rod main body, wherein the axes of the force limiting rod main body, the first limiting block and the second limiting block are on the same straight line, the centers of the two ends of the force limiting rod main body are respectively provided with a positioning block, one ends of the first limiting block and the second limiting block, which are close to the force limiting rod main body, are respectively provided with a positioning groove which is matched with the positioning blocks, the connecting parts of the first limiting block and the second limiting block and the force limiting rod main body are fixed by welding, the connecting strength of the limiting blocks is high during assembly, the deviation is not easy to occur, the force limiting effect is stable, and the pre-positioning can be performed, the concentricity is high, and the stability of the winder is improved.

Description

Force limiting structure of automobile safety belt

Technical Field

The utility model relates to the technical field of safety belt retractors, in particular to a force limiting structure of an automobile safety belt.

Background

The automobile safety belt assembly is a device for protecting personal safety in the automobile driving process, the safety belt retractor is an important part in the safety belt assembly, the safety belt can be automatically retracted, when the automobile is impacted, the safety belt is automatically tightened, a passenger is fixed on a seat, the passenger is prevented from being impacted forwards under inertia, the passenger is protected by the safety belt to a certain extent, but when the impact force is large, the injury to the passenger is increased, so the force-limiting type automobile safety belt takes place due to the force limitation, a force limiting rod is arranged in the safety belt retractor, when the tensioning force of the safety belt reaches the maximum, the force limiting rod is distorted and deformed, the safety belt is relaxed to a certain extent, and the injury to the passenger is reduced.

Two tip of current car blet's restriction pole all are provided with the stopper, it is fixed with moving axis and dead axle respectively, when the condition of taking place accident, feel through the area or the car feels the mechanism, die the dead axle lock, when the tensile force does not reach the restriction upper limit, the moving axis reaches the lock effect through the restriction pole, if the tensile force exceeds the restriction upper limit, the torsional deformation takes place for the restriction pole, thereby can make the moving axis rotatory, relax the safety belt, the stopper at current restriction pole both ends is generally through welded fastening, when the restriction pole takes place torsional deformation, the easy fracture of taking place, joint strength is low, the restriction effect is unstable, and when the stopper takes place the skew during the assembly, reduce the stability of moving axis coiling safety belt.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a force limiting structure of an automobile safety belt, which aims to solve the problems that a limiting block is easy to deviate and the connection strength is low during assembly in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: force limiting structure of automobile safety belt, including the force limiting rod main part and set up first stopper and the second stopper at force limiting rod main part both ends respectively, and the axis of force limiting rod main part, first stopper and second stopper is on same straight line, the center department at force limiting rod main part both ends all is provided with the locating piece, the one end that first stopper and second stopper are close to the force limiting rod main part all is provided with the constant head tank that matches each other with the locating piece, first stopper and second stopper pass through welded fastening with the junction of force limiting rod main part.

Preferably, the force limiting rod main body, the first limiting block and the second limiting block are all made of metal materials.

Preferably, the end, far away from the force limiting rod main body, of each of the first limiting block and the second limiting block is fixedly connected with the force limiting rod main body through a countersunk bolt.

Preferably, the positioning block is in a regular polygon structure.

Preferably, the force limiting rod main body is of a cylindrical structure, an outer sleeve of which the radius is larger than that of the force limiting rod main body is sleeved on the outer side of the force limiting rod main body, and annular sliding grooves matched with the outer sleeve are formed in the first limiting block and the second limiting block.

Preferably, the first limiting block and the second limiting block have the same structure, and a plurality of limiting lugs protruding outwards along the radial direction are uniformly arranged on the peripheral walls of the first limiting block and the second limiting block.

Compared with the prior art, the utility model has the beneficial effects that: the force limiting structure of the automobile safety belt

(1) The positioning blocks are arranged at the two ends of the force limiting rod main body, the positioning grooves are formed in one ends of the first limiting block and the second limiting block, the positioning blocks are inserted into the positioning grooves before welding, and the force limiting rod main body is fixedly connected with the first limiting block and the second limiting block through countersunk bolts, so that the first limiting block and the second limiting block can be pre-positioned before welding, the concentricity of the force limiting rod main body, the first limiting block and the second limiting block is ensured, the connection strength is improved, the first limiting block and the second limiting block are prevented from being broken and separated when the force limiting rod main body is subjected to torsional deformation, and the safety is high;

(2) the outer sleeve is sleeved outside the force limiting rod main body, the annular sliding grooves are formed in the first limiting block and the second limiting block, the outer sleeve can freely rotate between the first limiting block and the second limiting block, the force limiting rod main body can be protected, meanwhile, bending deformation is avoided when the force limiting rod main body is subjected to torsional deformation, and the force limiting effect is more stable.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional front view of the present invention;

FIG. 3 is a schematic side view of the first stopper of the present invention;

fig. 4 is a schematic view of the installation structure of the present invention.

In the figure: 1. a force-limiting lever body; 101. positioning blocks; 2. a first stopper; 3. a second limiting block; 4. a countersunk bolt; 5. an outer sleeve; 6. positioning a groove; 7. a limiting bump; 8. an annular chute; 9. a moving shaft; 10. and (5) fixing the shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, an embodiment of the present invention is shown: the force limiting structure of the automobile safety belt comprises a force limiting rod main body 1, and a first limiting block 2 and a second limiting block 3 which are respectively arranged at two ends of the force limiting rod main body 1, wherein the axes of the force limiting rod main body 1, the first limiting block 2 and the second limiting block 3 are on the same straight line, the force limiting rod main body 1, the first limiting block 2 and the second limiting block 3 are all made of metal materials, when the tension of the safety belt is increased, the torque applied to the force limiting rod main body 1 enables the stress in a torsion shaft material to exceed the yield limit, the surface layer of the force limiting rod main body 1 generates plastic deformation, and a movable shaft 9 can continue to rotate, so that the safety belt can be loosened, and the injury to passengers is reduced;

the first limiting block 2 and the second limiting block 3 have the same structure, and a plurality of limiting lugs 7 which protrude outwards in the radial direction are uniformly arranged on the outer peripheral walls of the first limiting block 2 and the second limiting block 3 and can be positioned when being installed with the movable shaft 9 and the fixed shaft 10;

the center of each of two ends of the force limiting rod main body 1 is provided with a positioning block 101, each positioning block 101 is of a regular polygon structure, one end of each of the first limiting block 2 and the second limiting block 3, which is close to the force limiting rod main body 1, is provided with a positioning groove 6 matched with the positioning block 101, the joint of each of the first limiting block 2 and the second limiting block 3 and the force limiting rod main body 1 is fixed by welding, one end of each of the first limiting block 2 and the second limiting block 3, which is far away from the force limiting rod main body 1, is fixedly connected with the force limiting rod main body 1 through a countersunk head bolt 4, the first limiting block 2 and the second limiting block 3 can be pre-positioned, the situation that the first limiting block 2 and the second limiting block 3 deviate in the welding process to influence the concentricity of the force limiting rod main body 1, the first limiting block 2 and the second limiting block 3 is avoided, and the connection strength can be improved at the same time;

the utility model discloses a limit force pole main part 1 is cylindrical structure, and the outer tube 5 that the radius is greater than limit force pole main part 1 has been cup jointed in the outside of limit force pole main part 1, all be provided with the annular spout 8 that matches each other with outer tube 5 on first stopper 2 and the second stopper 3, outer tube 5 can be free rotation between first stopper 2 and second stopper 3, both can play the effect of protection to limit force pole main part 1, avoid simultaneously that limit force pole main part 1 takes place buckling deformation when taking place the distortion, the limit force effect is more stable.

The working principle is as follows: before assembly, the positioning blocks 101 on two sides of the force limiting rod main body 1 are sequentially inserted into the positioning grooves 6 at one ends of the first limiting block 2 and the second limiting block 3, the first limiting block 2 and the second limiting block 3 are fixed with the force limiting rod main body 1 through the countersunk bolts 4, pre-positioning of the first limiting block 2 and the second limiting block 3 is realized, concentricity of the force limiting rod main body 1, the first limiting block 2 and the second limiting block 3 is ensured, and welding in a later period is performed, when the safety belt is used, the first limiting block 2 is fixedly connected with the fixed shaft 10, the second limiting block 3 is inserted into the movable shaft 9 and is fixedly connected with the movable shaft 9, the safety belt is wound on the movable shaft 9, when an accident happens, the fixed shaft 10 is locked through a belt sensing or vehicle sensing mechanism (not shown in the figure), when the tension force does not reach the upper limit of the limit force, the movable shaft 9 achieves the locking effect through the force limiting rod main body 1, if the tension force exceeds the upper limit of the limit force, the force-limiting rod body 1 is twisted and deformed, so that the movable shaft 9 can be rotated, the safety belt is loosened, and the injury to passengers is reduced.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. Force limiting structure of car blet, including force limiting rod main part (1) and set up first stopper (2) and second stopper (3) at force limiting rod main part (1) both ends respectively, and the axis of force limiting rod main part (1), first stopper (2) and second stopper (3) is on same straight line, its characterized in that: the center department at restriction lever main part (1) both ends all is provided with locating piece (101), the one end that first stopper (2) and second stopper (3) are close to restriction lever main part (1) all is provided with constant head tank (6) that match each other with locating piece (101), first stopper (2) and second stopper (3) pass through welded fastening with the junction of restriction lever main part (1).

2. The force limiting structure of the automobile seatbelt according to claim 1, wherein: the force limiting rod main body (1), the first limiting block (2) and the second limiting block (3) are all made of metal materials.

3. The force limiting structure of the automobile seatbelt according to claim 1, wherein: the end, far away from the force limiting rod main body (1), of the first limiting block (2) and the second limiting block (3) are fixedly connected with the force limiting rod main body (1) through countersunk bolts (4).

4. The force limiting structure of the automobile seatbelt according to claim 1, wherein: the positioning block (101) is of a regular polygon structure.

5. The force limiting structure of the automobile seatbelt according to claim 1, wherein: the limiting rod is characterized in that the limiting rod main body (1) is of a cylindrical structure, an outer sleeve (5) with the radius larger than that of the limiting rod main body (1) is sleeved on the outer side of the limiting rod main body (1), and annular sliding grooves (8) matched with the outer sleeve (5) are formed in the first limiting block (2) and the second limiting block (3).

6. The force limiting structure of the automobile seatbelt according to claim 1, wherein: the structure of the first limiting block (2) is the same as that of the second limiting block (3), and a plurality of limiting convex blocks (7) protruding outwards along the radial direction are evenly arranged on the peripheral walls of the first limiting block (2) and the second limiting block (3).

Images