Safety belt anti-locking structure, assembly, commercial vehicle and method

Abstract

The application discloses a safety belt anti-locking structure, assembly, commercial vehicle and method, and belongs to the technical field of vehicle engineering, wherein the safety belt anti-locking structure comprises a safety belt webbing which is arranged on a seat of a commercial vehicle; and a limiting component which is fixedly arranged on an exposed section of the safety belt webbing and is used for blocking the safety belt webbing from being excessively retracted when the safety belt webbing is released from constraint and is recovered, so that the acceleration of the safety belt webbing in the recovery process is lower than the locking trigger acceleration of a winder. The application solves the technical problems in the industry, such as winder false locking caused by the rapid recovery of the safety belt webbing after the integrated safety belt of the seat of the commercial vehicle is unlocked, the tight blocking of the exposed safety belt webbing and the failure of normal pulling out and use of the safety belt next time, and meanwhile, the stable operation of the safety belt system with high reliability and normal opening is realized without damaging the Z-direction large-stroke damping comfort of the seat of the commercial vehicle.

Description

Technical Field

[0001] This invention belongs to the field of vehicle engineering technology, and particularly relates to a seat belt anti-locking structure, assembly, commercial vehicle, and method. Background Technology

[0002] Commercial vehicles (such as heavy trucks and buses) often encounter complex road conditions during operation, resulting in significant vehicle bumps. To improve the comfort of drivers and passengers, commercial vehicle seats are typically equipped with Z-axis (vertical) shock absorption mechanisms, giving the seats a large Z-axis shock absorption travel.

[0003] Unlike passenger cars where seat belts are fixed to the vehicle body, in commercial vehicles, if the seat belts are fixed to the vehicle body, the seats will move up and down with the vehicle's movement, while the seat belts remain fixed in position. This can easily lead to the seat belts frequently pulling or tightening on the shoulders and bodies of the driver and passengers, seriously affecting driving comfort. Therefore, commercial vehicle seat belts typically adopt an integrated structure, meaning the seat belt is integrated into the commercial vehicle seat and moves up and down in sync with the seat to absorb shocks.

[0004] However, because the exposed webbing of the seatbelt integrated into the seat is relatively short, when a passenger exits the vehicle or unlocks the seatbelt, the webbing quickly retracts under the force of the spring inside the retractor. In some scenarios, if the webbing retracts too quickly, its retraction acceleration can easily reach the anti-lock trigger threshold of the locking mechanism inside the retractor. At this time, the retractor may mistakenly identify it as an emergency collision or sudden braking, thus triggering the emergency locking mechanism, causing the exposed webbing to become stuck in a taut state. This false locking (false malfunction) prevents the seatbelt from being properly pulled out and worn the next time it is used, seriously affecting the reliability of commercial vehicle seatbelts and the daily user experience. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a seat belt anti-locking structure, assembly, commercial vehicle, and method, which solves the industry technical problem of accidental locking of the retractor, taut jamming of exposed webbing, and inability to be properly pulled out for use after the integrated seat belt of a commercial vehicle seat is unlocked due to rapid webbing retraction. At the same time, without compromising the Z-direction large-travel shock absorption comfort of the commercial vehicle seat, it achieves highly reliable and always-open stable operation of the seat belt system.

[0006] This invention is implemented by providing a seatbelt anti-locking structure, comprising: Seat belt webbing, which is installed on commercial vehicle seats; and A limiting component, which is fixedly disposed on the exposed section of the seat belt webbing, is used to prevent the seat belt webbing from excessively retracting when the seat belt webbing is released from restraint and retracted, so that the acceleration of the seat belt webbing during the retraction process is lower than the locking trigger acceleration of the retractor.

[0007] Furthermore, the limiting component is disposed on the seat belt webbing near the seat belt cover outlet.

[0008] Furthermore, the fixing position of the limiting component on the seat belt webbing is preset according to the height of the seat belt outlet on the commercial vehicle seat.

[0009] Furthermore, the limiting component is a limiting buckle installed on the seat belt webbing.

[0010] Another approach provides an integrated seatbelt assembly, comprising: The retractor has an internal coil spring; The seatbelt cover has a seatbelt exit. The seatbelt webbing has one end connected to the retractor and the other end passing through the seatbelt outlet of the seatbelt housing and extending to the outside to form exposed webbing; and A limiting buckle is fixedly fastened to the exposed webbing in the area near the seat belt exit. When the seat belt webbing is unlocked and retracted, the limiting buckle forms a physical interference limit with the seat belt cover or the seat belt outlet to prevent the retractor from accidentally locking due to excessive acceleration of the seat belt webbing retraction.

[0011] Furthermore, the seat belt assembly is a three-point seat belt structure, and the seat belt assembly is integrally integrated into the commercial vehicle seat.

[0012] Furthermore, the external dimensions of the limiting buckle are configured to be smaller than the width range of the exposed webbing, and the volume of the limiting buckle is configured to be exposed and engaged with the surface of the seat belt webbing.

[0013] Another aspect provides a commercial vehicle seat assembly, characterized in that it includes: The seat body features a Z-axis shock absorption mechanism; and The integrated seat belt assembly as described in any one of the claims is fixedly installed on the seat body and moves up and down in a Z-direction shock absorption manner in sync with the seat body.

[0014] Another aspect provides a commercial vehicle, including the aforementioned commercial vehicle seat.

[0015] On the other hand, a method for preventing seatbelt locking is provided, including the following steps: Obtain the position and height of the seat belt exit on the commercial vehicle seat; Based on the aforementioned height, a limiting buckle is installed at a specific position near the seat belt outlet on the exposed section of the integrated seat belt webbing; When the seat belt webbing is unlocked and rapidly retracted by the coil spring inside the retractor, the continued retraction of the seat belt webbing is blocked by the collision interference between the limiting buckle and the seat belt outlet or seat fixing structure. By using the blocking effect of the limiting buckle, the acceleration of the seat belt webbing during the retraction process is controlled to be lower than the anti-mislocking threshold of the retractor, keeping the exposed webbing in a normally open pulled-out state without tension locking.

[0016] The advantages and technical effects of this invention are as follows: By adopting the above-mentioned technical solution and fixing a limiting component on the exposed webbing of the commercial vehicle seat belt, the traditional mindset of relying on changing the complex internal structure of the retractor to prevent accidental locking is broken. When the seat belt is unlocked and retracted, the physical blocking effect of the limiting component on the seat belt webbing precisely controls and blocks the excessive retraction of the webbing, ensuring that the acceleration of the webbing during the entire retraction process remains below the locking trigger acceleration of the retractor. This fundamentally and completely solves the industry technical problem of accidental locking of the retractor, taut and jammed exposed webbing, and inability to be pulled out normally for use after the integrated seat belt of commercial vehicle seats is unlocked due to the rapid retraction of the webbing. At the same time, without compromising the Z-direction large-travel shock absorption comfort of the commercial vehicle seat, the seat belt system achieves highly reliable and always-open stable operation.

[0017] Without requiring redesign or modification of the retractor's internal precision locking structure, coil spring, and centrifugal trigger mechanism, simply by adding a physical limiting component to the exposed section of the seatbelt webbing, excessive retraction acceleration can be eliminated directly before the end of the retraction stroke, solving the problem of accidental locking with extremely low modification costs and extremely high reliability.

[0018] By using a limiting component to prevent the webbing from getting overly wound into the retractor, the exposed webbing always retains appropriate freedom and slack after unlocking and retraction, preventing the exposed webbing from entering an overly taut, deadlocked state. This ensures that drivers and passengers can smoothly and without jamming pull out and put on the seat belt the next time they ride in the vehicle, greatly improving the ease of use of commercial vehicle seat belts.

[0019] While fully retaining the large-travel shock absorption function of commercial vehicle seats in the Z-direction (up and down direction) (i.e., the seat belt moves synchronously with the seat and does not hurt the shoulders when driving on bumpy roads), it eliminates the potential for false failures caused by the integrated structure, achieving the best balance between seat shock absorption comfort and seat belt system stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the anti-locking structure for commercial vehicle seats and seat belts provided in an embodiment of the present invention.

[0021] In the diagram: 1. Seat belt webbing; 2. Limiting component; 3. Seat belt cover; 4. Seat body. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0024] like Figure 1 As shown, one embodiment of this application provides a seatbelt anti-locking structure, including: Seat belt webbing 1, which is installed on the seat of a commercial vehicle; and The limiting component 2 is fixedly disposed on the exposed section of the seat belt webbing 1 and is used to prevent the seat belt webbing 1 from retracting excessively when the seat belt webbing 1 is released from restraint and retracted, so that the acceleration of the seat belt webbing 1 during the retraction process is lower than the locking trigger acceleration of the retractor.

[0025] Furthermore, the limiting component 2 is disposed on the seat belt webbing 1 near the exit of the seat belt cover 3.

[0026] Furthermore, the fixed position of the limiting component 2 on the seat belt webbing 1 is preset according to the height of the seat belt outlet on the commercial vehicle seat.

[0027] Furthermore, the limiting component 2 is a limiting buckle installed on the seat belt webbing 1.

[0028] Another embodiment provides an integrated seat belt assembly, including: The retractor has an internal coil spring; Seat belt cover 3 is provided with a seat belt exit; Seatbelt webbing 1, one end connected to the retractor, the other end passing through the seatbelt outlet of the seatbelt housing 3 and extending to the outside to form exposed webbing; and A limiting buckle is fixedly fastened to the exposed webbing in the area near the seat belt exit. When the seat belt webbing 1 is unlocked and retracted, the limiting buckle forms a physical interference limit with the seat belt cover 3 or the seat belt outlet to prevent the retractor from being accidentally locked due to excessive acceleration of the seat belt webbing 1 during retraction.

[0029] Furthermore, the seat belt assembly is a three-point seat belt structure, and the seat belt assembly is integrally integrated into the commercial vehicle seat.

[0030] Furthermore, the external dimensions of the limiting buckle are configured to be smaller than the width range of the exposed webbing, and the volume of the limiting buckle is configured to be exposed and engaged with the surface of the seat belt webbing 1.

[0031] Another embodiment provides a commercial vehicle seat assembly, characterized in that it includes: Seat body 4, equipped with a Z-direction shock absorption mechanism; and The integrated seat belt assembly as described in any one of the claims is fixedly installed on the seat body 4 and synchronously moves up and down in the Z direction to absorb shocks.

[0032] Another embodiment provides a commercial vehicle including the aforementioned commercial vehicle seat.

[0033] Another embodiment provides a method for preventing seat belt locking, comprising the following steps: Obtain the position and height of the seat belt exit on the commercial vehicle seat; Based on the aforementioned position height, a limiting buckle is installed at a specific position near the seat belt outlet on the exposed section of the integrated seat belt webbing 1. When the seat belt webbing 1 is unlocked and rapidly retracted by the coil spring inside the retractor, the continued retraction of the seat belt webbing 1 is blocked by the collision interference between the limiting buckle and the seat belt outlet or seat fixing structure. By using the blocking effect of the limiting buckle, the acceleration of the seat belt webbing 1 during the retraction process is controlled to be lower than the anti-mislocking threshold of the retractor, keeping the exposed webbing in a normally open pulled-out state without tension locking.

[0034] By adopting the above technical solution, and by fixing the limiting component 2 on the exposed webbing of the commercial vehicle seat belt, the traditional mindset of relying on changing the complex internal structure of the retractor to prevent accidental locking is broken. When the seat belt is unlocked and retracted, the limiting component 2 is used to physically block the seat belt webbing 1, precisely controlling and blocking the excessive retraction of the webbing. This ensures that the acceleration of the webbing during the entire retraction process remains below the locking trigger acceleration of the retractor. This fundamentally and completely solves the industry technical problem of accidental locking of the retractor, taut jamming of the exposed webbing, and inability to be pulled out normally for use after the integrated seat belt of the commercial vehicle seat is unlocked due to the rapid retraction of the webbing. At the same time, without compromising the Z-direction large-travel shock absorption comfort of the commercial vehicle seat, the seat belt system achieves highly reliable and always-open stable operation.

[0035] Without requiring redesign or modification of the intricate locking structure, coil spring, and centrifugal trigger mechanism inside the retractor, simply by adding a physical limiting component 2 to the exposed section of the seatbelt webbing 1, excessive retraction acceleration can be eliminated directly before the end of the retraction stroke, solving the problem of accidental locking with extremely low modification cost and extremely high reliability.

[0036] By using the limiting component 2 to prevent the webbing from getting too caught in the retractor, the exposed webbing always retains appropriate freedom and slack after unlocking and retraction, avoiding the exposed webbing from entering an overly tight, locked state. This ensures that drivers and passengers can smoothly and without jamming pull out and put on the seat belt the next time they ride in the vehicle, greatly improving the ease of use of commercial vehicle seat belts.

[0037] While fully retaining the large-travel shock absorption function of commercial vehicle seats in the Z-direction (up and down direction) (i.e., the seat belt moves synchronously with the seat and does not hurt the shoulders when driving on bumpy roads), it eliminates the potential for false failures caused by the integrated structure, achieving the best balance between seat shock absorption comfort and seat belt system stability.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A seatbelt anti-locking structure, characterized in that, include: Seat belt webbing, which is installed on commercial vehicle seats; as well as A limiting component, which is fixedly disposed on the exposed section of the seat belt webbing, is used to prevent the seat belt webbing from excessively retracting when the seat belt webbing is released from restraint and retracted, so that the acceleration of the seat belt webbing during the retraction process is lower than the locking trigger acceleration of the retractor.

2. The seat belt anti-locking structure according to claim 1, characterized in that, The limiting component is located on the seat belt webbing near the seat belt cover outlet.

3. The seat belt anti-locking structure according to claim 1 or 2, characterized in that, The fixed position of the limiting component on the seat belt webbing is preset according to the height of the seat belt outlet on the commercial vehicle seat.

4. The seat belt anti-locking structure according to claim 1, characterized in that, The limiting component is a limiting buckle installed on the seat belt webbing.

5. An integrated seat belt assembly, characterized in that, include: The retractor has an internal coil spring; The seatbelt cover has a seatbelt exit. The seat belt webbing has one end connected to the retractor and the other end passing through the seat belt outlet of the seat belt housing and extending to the outside to form an exposed webbing; as well as A limiting buckle is fixedly fastened to the exposed webbing in the area near the seat belt exit. When the seat belt webbing is unlocked and retracted, the limiting buckle forms a physical interference limit with the seat belt cover or the seat belt outlet to prevent the retractor from accidentally locking due to excessive acceleration of the seat belt webbing retraction.

6. The integrated seat belt assembly according to claim 1, characterized in that, The seat belt assembly is a three-point seat belt structure, and the seat belt assembly is integrated into the commercial vehicle seat.

7. The integrated seat belt assembly according to claim 1, characterized in that, The external dimensions of the limiting buckle are configured to be smaller than the width range of the exposed webbing, and the volume of the limiting buckle is configured to be exposed and engaged with the surface of the seat belt webbing.

8. A commercial vehicle seat assembly, characterized in that, include: The seat body is equipped with a Z-axis shock absorption mechanism; as well as The integrated seat belt assembly as described in any one of claims 5 to 7, wherein the integrated seat belt assembly is fixedly installed on the seat body and moves up and down in a Z-direction shock absorption manner in sync with the seat body.

9. A commercial vehicle, characterized in that, Including the commercial vehicle seat as described in claim 8.

10. A method for preventing seatbelt locking, characterized in that, Includes the following steps: Obtain the position and height of the seat belt exit on the commercial vehicle seat; Based on the aforementioned height, a limiting buckle is installed at a specific position near the seat belt outlet on the exposed section of the integrated seat belt webbing; When the seat belt webbing is unlocked and rapidly retracted by the coil spring inside the retractor, the continued retraction of the seat belt webbing is blocked by the collision interference between the limiting buckle and the seat belt outlet or seat fixing structure. By using the blocking effect of the limiting buckle, the acceleration of the seat belt webbing during the retraction process is controlled to be lower than the anti-mislocking threshold of the retractor, keeping the exposed webbing in a normally open pulled-out state without tension locking.

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