Safety belt retractor with force reducing device

Abstract

The utility model relates to the field of safety belt winding devices, in particular to a safety belt winding device with a force reducing device, which comprises a safety belt winding device body, a guide component is arranged on one side of the safety belt winding device body, a guide component is arranged on one side of the safety belt winding device body and positioned outside the guide component, and the guide component comprises a guide frame body. A sliding through hole is formed in the position, located at the guiding assembly, in the guiding frame in a penetrating mode, a cavity is formed in the position, located on one side of the sliding through hole, in the guiding frame, and a two-way lead screw driving assembly is arranged in the cavity. According to the magnetic auxiliary roller device, the two-way lead screw driving assembly, the first auxiliary roller assembly and the second auxiliary roller assembly are arranged in a matched mode, the distance between the first auxiliary roller assembly and the second auxiliary roller assembly can be adjusted, and in the process that the safety belt is pulled out and recycled, the magnetic auxiliary roller body can guide the safety belt to move along a smoother path; friction and abrasion of the safety belt are reduced, and the service life of the safety belt is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of seat belt retractors, in particular to a seat belt retractor with a force reduction device. Background Art

[0002] Automobile safety devices are safety devices that restrain occupants during collisions and prevent secondary collisions between occupants and the steering wheel, instrument panel, etc. during collisions, or prevent occupants from rushing out of the vehicle during collisions, resulting in injuries or deaths. The seat belt device generally includes: a webbing that restricts the occupant, a seat belt retractor that winds the webbing, a guide fixture provided on the vehicle body side to guide the above-mentioned webbing, a belt fixture that fixes the above-mentioned webbing to the vehicle body side, a buckle disposed on the side of the above-mentioned seat, and a tongue disposed on the above-mentioned webbing. By inserting the tongue into the buckle, the occupant is restricted to the seat by the webbing, and the seat belt retractor.

[0003] The function of the retractor is to store the webbing and lock the webbing from being pulled out. It is the most complex mechanical part in the seat belt. Inside the retractor is a ratchet mechanism. Under normal circumstances, the occupant can freely and uniformly pull the webbing on the seat. However, once the continuous pulling of the webbing from the retractor stops or when the vehicle encounters an emergency, the ratchet mechanism will lock to automatically lock the webbing and prevent the webbing from being pulled out. A retracting assembly is provided on the retractor. The function of the retracting assembly is to ensure the effective retraction of the safety webbing, and at the same time, apply a force to the safety webbing to play the role of restraining the seat belt.

[0004] At the same time, the existing seat belt retractor does not have a good guiding structure. After long-term use of the seat belt, it is easy to cause friction and wear of the seat belt, shortening the service life of the long seat belt. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a seat belt retractor with a force reduction device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A seat belt retractor with a force reduction device includes a seat belt retractor body. A guiding assembly is arranged on one side of the seat belt retractor body. A guiding component is arranged outside the guiding assembly on one side of the seat belt retractor body. The guiding component includes a guiding frame body. A sliding through hole is penetrated and opened at the position of the guiding assembly in the guiding frame body. A cavity is opened on one side of the sliding through hole in the guiding frame body. A bidirectional lead screw driving assembly is arranged in the cavity, and a first auxiliary roller assembly and a second auxiliary roller assembly are arranged in the cavity through the bidirectional lead screw driving assembly;

[0008] Both the first auxiliary roller assembly and the second auxiliary roller assembly include a fixed shaft. One side of the fixed shaft is connected with a nut pair, and the other side of the fixed shaft is connected with a limit slider. Moreover, a magnetic adsorption auxiliary roller body is movably sleeved on the outer wall of the fixed shaft.

[0009] In addition, a preferred structure is that a chute is formed at the position of the magnetic adsorption auxiliary roller body in the guiding frame body, and magnetic materials adapted to attract and adsorb the magnetic adsorption auxiliary roller body are arranged on both sides in the chute.

[0010] In addition, a preferred structure is that the bidirectional lead screw driving assembly includes a bidirectional lead screw body. A nut pair is connected to the outer wall of the bidirectional lead screw body, and the bidirectional lead screw body is driven by a driving motor.

[0011] In addition, a preferred structure is that the limit slider is slidably arranged in the guiding frame body, and a limit chute is formed at the position of the limit slider in the guiding frame body. A guiding rod is horizontally arranged in the middle of the limit chute.

[0012] In addition, a preferred structure is that springs are sleeved on both sides of the outer wall of the guiding rod, one side of the spring is connected with the guiding frame body, and the other side of the spring is connected with the limit slider.

[0013] In addition, a preferred structure is that connecting seats are arranged on both sides of the bottom of the guiding frame body and at the position of the guiding assembly, and the other side of the connecting seat is connected with the seat belt retractor body.

[0014] The beneficial effects of the present utility model are as follows:

[0015] In the present utility model, through the cooperative setting of the bidirectional lead screw driving assembly, the first auxiliary roller assembly and the second auxiliary roller assembly, the distance between the first auxiliary roller assembly and the second auxiliary roller assembly can be adjusted. During the process of pulling out and retracting the seat belt, the magnetic adsorption auxiliary roller body can guide the seat belt to move along a smoother path, reduce the friction and wear of the seat belt, and help to extend the service life of the seat belt. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a seat belt retractor with a force reduction device proposed by the present utility model;

[0017] Figure 2 It is a partial cross-sectional structural diagram of a seat belt retractor with a force reduction device proposed by the present utility model;

[0018] Figure 3 It is a schematic cross-sectional structural diagram of the guiding assembly.

[0019] In the figure: 1. Seat belt retractor body; 11. Guide component; 2. Guide component; 3. Bi-directional lead screw drive component; 31. Bi-directional lead screw body; 4-1. First auxiliary roller component; 4-2. Second auxiliary roller component; 41. Nut pair; 42. Limit slider; 43. Magnetic adsorption auxiliary roller body; 5. Guide rod; 6. Spring. Detailed implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] Refer to Figures 1-3 , a seat belt retractor with a force reduction device, including a seat belt retractor body 1. A guide component 11 is arranged on one side of the seat belt retractor body 1. A guide component 2 is arranged outside the guide component 11 on one side of the seat belt retractor body 1. The guide component 2 includes a guide frame body. A sliding through hole is penetrated and opened at the position of the guide component 11 in the guide frame body. A cavity is opened on one side of the sliding through hole in the guide frame body. A bi-directional lead screw drive component 3 is arranged in the cavity, and a first auxiliary roller component 4-1 and a second auxiliary roller component 4-2 are arranged in the cavity through the bi-directional lead screw drive component 3;

[0022] Moreover, both the first auxiliary roller component 4-1 and the second auxiliary roller component 4-2 include a fixed shaft. A nut pair 41 is connected to one side of the fixed shaft. A limit slider 42 is connected to the other side of the fixed shaft. And a magnetic adsorption auxiliary roller body 43 is movably sleeved on the outer wall of the fixed shaft.

[0023] In the guide frame body, a chute is opened at the position of the magnetic adsorption auxiliary roller body 43. Magnetic materials adapted to attract and adsorb the magnetic adsorption auxiliary roller body 43 are arranged on both sides in the chute.

[0024] At the same time, the bi-directional lead screw drive component 3 includes a bi-directional lead screw body 31. A nut pair 41 is connected to the outer wall of the bi-directional lead screw body 31. And the bi-directional lead screw body 31 is driven by a driving motor.

[0025] Moreover, the limit slider 42 is slidably arranged in the guide frame body. And a limit chute is opened at the position of the limit slider 42 in the guide frame body. A guide rod 5 is horizontally arranged in the middle of the limit chute.

[0026] Moreover, springs 6 are sleeved on both sides of the outer wall of the guide rod 5. And one side of the spring 6 is connected to the guide frame body, and the other side of the spring 6 is connected to the limit slider 42.

[0027] Furthermore, connection seats are arranged on both sides of the bottom of the guide frame body and at the position of the guide component 11. And the other side of the connection seat is connected to the seat belt retractor body 1.

[0028] It should be noted that the specific structures and working methods of the seat belt retractor body 1 and the guiding assembly 11 are all prior arts already disclosed in the current market, and do not belong to the main technical problems to be solved in this technical solution. Therefore, they will not be elaborated in this utility model.

[0029] Moreover, the specific structure and working method of the bidirectional lead screw drive assembly 3 are both prior arts already disclosed in the current market, and do not belong to the main technical problems to be solved in this technical solution. Therefore, they will not be elaborated in this utility model.

[0030] In this embodiment, the distance between the first auxiliary roller assembly 4-1 and the second auxiliary roller assembly 4-2 is adjusted by the bidirectional lead screw drive assembly 3. And through the setting of the spring 6, when the distance is adjusted on one side of the first auxiliary roller assembly 4-1 and the second auxiliary roller assembly 4-2, the other side is always basically in contact, ensuring the limiting and assisting of the seat belt by the first auxiliary roller assembly 4-1 and the second auxiliary roller assembly 4-2. At the same time, through the adsorption of the magnetic adsorption auxiliary roller body 43 on the inner wall of the chute, it is ensured that while the magnetic adsorption auxiliary roller body 43 rotates, it has a certain limit, making the magnetic adsorption auxiliary roller body 43 rotate relatively slowly. During the process of the seat belt being pulled out and retracted, the magnetic adsorption auxiliary roller body 43 can guide the seat belt to move along a smoother path, reducing the friction and wear of the seat belt, and helping to extend the service life of the seat belt.

[0031] In this utility model, through the cooperative setting of the bidirectional lead screw drive assembly 3 and the first auxiliary roller assembly 4-1 and the second auxiliary roller assembly 4-2, the distance between the first auxiliary roller assembly 4-1 and the second auxiliary roller assembly 4-2 can be adjusted. During the process of the seat belt being pulled out and retracted, the magnetic adsorption auxiliary roller body 43 can guide the seat belt to move along a smoother path, reducing the friction and wear of the seat belt, and helping to extend the service life of the seat belt.

[0032] The above is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A seat belt retractor with a force reduction device, comprising a seat belt retractor body (1), characterized in that: A guide assembly (11) is provided on one side of the seat belt retractor body (1); a guide assembly (2) is provided on one side of the seat belt retractor body (1) outside the guide assembly (11); the guide assembly (2) comprises a guide frame; a sliding through hole is provided in the guide frame at the guide assembly (11); a cavity is provided on one side of the sliding through hole; a bidirectional screw drive assembly (3) is provided in the cavity; and a first auxiliary roller assembly (4-1) and a second auxiliary roller assembly (4-2) are provided in the cavity via the bidirectional screw drive assembly (3); The first auxiliary roller assembly (4-1) and the second auxiliary roller assembly (4-2) both comprise a fixed shaft, one side of the fixed shaft is connected to a nut pair (41), the other side of the fixed shaft is connected to a limiting slider (42), and the outer wall of the fixed shaft is movably sleeved with a magnetic auxiliary roller body (43).

2. A seat belt retractor with a force reduction device according to claim 1, characterized in that: A slide groove is provided in the guide frame at the magnetic auxiliary roller body (43), and magnetic materials adapted to attract the magnetic auxiliary roller body (43) are provided on both sides of the slide groove.

3. A seat belt retractor with a force reduction device according to claim 1, characterized in that: The bidirectional screw drive assembly (3) comprises a bidirectional screw body (31), the outer wall of the bidirectional screw body (31) is connected to a nut pair (41), and the bidirectional screw body (31) is driven by a drive motor.

4. A seat belt retractor with a force reduction device according to claim 1, characterized in that: The limit slide block (42) is slidably arranged in the guide frame, and a limit slide groove is provided in the guide frame at the limit slide block (42), and a guide rod (5) is horizontally arranged in the middle of the limit slide groove.

5. A seat belt retractor with a force reduction device according to claim 4, characterized in that: Springs (6) are sleeved on both sides of the outer wall of the guide rod (5), one side of the spring (6) is connected to the guide frame, and the other side of the spring (6) is connected to the limit slider (42).

6. A seat belt retractor with a force reduction device according to claim 1, characterized in that: A connecting seat is provided at the bottom of the guide frame and on both sides of the guide assembly (11), and the other side of the connecting seat is connected to the safety belt retractor body (1).

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