Low noise silent operation seat belt retractor

Abstract

The utility model belongs to the technical field of safety belt winder, especially low noise mute operation's safety belt winder, install the winder main part for winding safety belt on the bottom plate, the outside installation of winder main part has the sound absorption board for sound absorption, the surface installation of bottom plate has the sound absorption cover for sound absorption, and the sound absorption cover is wrapped winder main part and sound absorption board, install the guide roller mechanism for safety belt guide on winder main part, the safety belt passes through the hole of sound absorption board and sound absorption cover surface opening, through the sound absorption board of winder main body outside installation, the surface installation of bottom plate simultaneously sound absorption cover is wrapped in winder main body and sound absorption board outside, thereby realizes sound absorption board and sound absorption cover cooperation reduces the noise of winder main body work, thereby reduces the noise of safety belt winder, and the guide roller mechanism for safety belt guide is installed on winder main body, reduces the friction of safety belt and safety belt winder when pulling out, has realized the purpose of reducing winder noise.

Description

Technical Field

[0001] This utility model belongs to the technical field of seat belt retractors, specifically relating to a low-noise, quiet-operating seat belt retractor. Background Technology

[0002] In automotive safety systems, seatbelt retractors are key components ensuring the safety of occupants. They automatically retract and release the seatbelts to restrain and protect passengers during vehicle operation. As people's demands for driving comfort continue to increase, interior noise levels have become an important indicator of vehicle quality. The noise generated by the seatbelt retractor during operation, such as the friction noise of mechanical parts during retraction and the collision noise of the seatbelt against related structures when pulled out or retracted, directly affects the comfort experience of passengers.

[0003] Existing seatbelt retractors have several shortcomings in noise control. Some retractors rely solely on simple structural designs without effectively addressing the root causes of noise, resulting in significant noise generated by friction and vibration of internal mechanical components during operation. Other retractors, while incorporating some noise reduction structures, have limited effectiveness and fail to meet users' demands for a quiet environment. Furthermore, in the design of the seatbelt guide structure, traditional retractors exhibit significant friction between the guide components and the seatbelt, which not only increases noise but also accelerates wear on both the seatbelt and guide components, reducing the retractor's lifespan and safety.

[0004] Therefore, there is an urgent need to design a seat belt retractor that can effectively reduce noise and achieve silent operation in order to improve the comfort and safety of car driving. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a low-noise, quiet-operating seatbelt retractor. The specific technical solution is as follows:

[0006] A low-noise, quiet-operating seat belt retractor includes a base plate on which a retractor body for winding the seat belt is mounted. A sound-absorbing plate for sound absorption is mounted on the outer side of the retractor body. A sound-absorbing cover for sound absorption is mounted on the surface of the base plate, and the sound-absorbing cover covers the retractor body and the sound-absorbing plate. A guide roller mechanism for guiding the seat belt is mounted on the retractor body. The seat belt passes through holes opened on the surfaces of the sound-absorbing plate and the sound-absorbing cover.

[0007] The guide roller mechanism includes a support roller and a pressure limiting roller parallel to the main body of the retractor. A first silent bearing for the rotation of the support roller is installed on the inner surface of the main body of the retractor, and a second silent bearing for the rotation of the pressure limiting roller is installed on the outer surface of the main body of the retractor. A rubber sleeve is fixed in the middle of the pressure limiting roller, and the safety belt is set between the support roller and the rubber sleeve.

[0008] Preferably, the sound-absorbing panel comprises a polyester fiber cotton layer, a basalt wool layer, and a melamine sound-absorbing sponge layer that are bonded and fixed from the inside out.

[0009] Preferably, the surfaces of the polyester fiber cotton layer, the basalt wool layer, and the melamine sound-absorbing sponge layer are all provided with honeycomb pores. The maximum inner diameter of the honeycomb pores in the polyester fiber cotton layer is 1 cm, and the distance between two adjacent honeycomb pores on the polyester fiber cotton layer is 2 cm. The maximum inner diameter of the honeycomb pores in the basalt wool layer is 0.8 cm, and the distance between two adjacent honeycomb pores on the basalt wool layer is 1.6 cm. The maximum inner diameter of the honeycomb pores in the melamine sound-absorbing sponge layer is 0.5 cm, and the distance between two adjacent honeycomb pores on the melamine sound-absorbing sponge layer is 1 cm.

[0010] Preferably, the sound-absorbing cover comprises a polyurethane foam layer, a rubber and plastic sound-insulating cotton layer, and an aluminum foil layer that are bonded and fixed from the inside out.

[0011] Preferably, both the polyurethane foam layer and the rubber-plastic sound insulation layer have honeycomb holes on their surfaces. The maximum inner diameter of the honeycomb holes in the polyurethane foam layer is 0.3 cm, and the distance between two adjacent honeycomb holes on the polyurethane foam layer is 0.6 cm. The maximum inner diameter of the honeycomb holes in the rubber-plastic sound insulation layer is 0.15 cm, and the distance between two adjacent honeycomb holes on the rubber-plastic sound insulation layer is 0.3 cm.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. By installing a sound-absorbing plate on the outside of the retractor body, and simultaneously covering the retractor body and the sound-absorbing plate with a sound-absorbing cover installed on the bottom plate, the noise of the retractor body during operation is reduced, thereby reducing the noise of the seat belt retractor. The guide roller mechanism installed on the retractor body is used to guide the seat belt, reducing friction between the seat belt and the seat belt retractor when it is pulled out, thus achieving the purpose of reducing the noise of the retractor. The guide roller mechanism consists of a support roller, a first silent bearing, a pressure limiting roller, a rubber sleeve, and a second silent bearing, which facilitates the cooperation of the support roller and the rubber sleeve to support the seat belt. The first silent bearing installed at both ends of the support roller and the second silent bearing installed at both ends of the pressure limiting roller reduce the noise when the support roller and the pressure limiting roller rotate, achieving silent operation of the seat belt retractor.

[0014] 2. The sound-absorbing panel is composed of a polyester fiber cotton layer, a basalt wool layer, and a melamine sound-absorbing sponge layer. All three layers have honeycomb holes to facilitate the absorption of noise generated by the retractor body. The sound-absorbing cover is composed of a polyurethane foam cotton layer, a rubber and plastic sound insulation cotton layer, and an aluminum foil layer. The aluminum foil layer supports the rubber and plastic sound insulation cotton layer and the polyurethane foam cotton layer. At the same time, the polyurethane foam cotton layer and the rubber and plastic sound insulation cotton layer work together to absorb sound and reduce the noise of the seat belt retractor. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a partial cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the component structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the sound-absorbing panel structure in this utility model;

[0019] Figure 5 This is a schematic diagram of the sound-absorbing cover structure in this utility model;

[0020] Figure 6 This is a schematic diagram of the guide roller mechanism in this utility model.

[0021] Reference numerals: 1. Base plate; 2. Retractor body; 3. Safety belt; 4. Sound-absorbing panel; 41. Polyester fiber cotton layer; 42. Basalt wool layer; 43. Melamine sound-absorbing sponge layer; 5. Sound-absorbing cover; 51. Polyurethane foam cotton layer; 52. Rubber and plastic sound insulation cotton layer; 53. Aluminum foil layer; 6. Guide roller mechanism; 61. Support roller; 62. First silent bearing; 63. Pressure limiting roller; 64. Rubber sleeve; 65. Second silent bearing. Detailed Implementation

[0022] The technical solution of this utility model will now be described with reference to the accompanying drawings and embodiments.

[0023] Please see Figure 1-6 This embodiment provides the following technical solution: a low-noise, quiet-operating seat belt retractor, including a base plate 1, a retractor body 2 for winding the seat belt 3 is installed on the base plate 1, a sound-absorbing plate 4 for sound absorption is installed on the outer side of the retractor body 2, a sound-absorbing cover 5 for sound absorption is installed on the surface of the base plate 1, and the sound-absorbing cover 5 covers the retractor body 2 and the sound-absorbing plate 4, a guide roller mechanism 6 for guiding the seat belt 3 is installed on the retractor body 2, and the seat belt 3 passes through the holes opened on the surface of the sound-absorbing plate 4 and the sound-absorbing cover 5;

[0024] The guide roller mechanism 6 includes a support roller 61 and a pressure limiting roller 63 parallel to the winding shaft of the retractor body 2. A first silent bearing 62 for the rotation of the support roller 61 is installed on the inner surface of the retractor body 2, and a second silent bearing 65 for the rotation of the pressure limiting roller 63 is installed on the outer surface of the retractor body 2. A rubber sleeve 64 is fixed in the middle of the pressure limiting roller 63, and a safety belt 3 is set between the support roller 61 and the rubber sleeve 64.

[0025] In this embodiment, a sound-absorbing plate 4 is installed on the outside of the retractor body 2, and a sound-absorbing cover 5 is installed on the surface of the base plate 1, which wraps around the retractor body 2 and the sound-absorbing plate 4. This allows the sound-absorbing plate 4 and the sound-absorbing cover 5 to work together to reduce the noise of the retractor body 2 during operation, thereby reducing the noise of the seat belt retractor. The guide roller mechanism 6 installed on the retractor body 2 is used to guide the seat belt 3, reducing the friction between the seat belt 3 and the seat belt retractor when it is pulled out, thus achieving the purpose of reducing the noise of the retractor. The guide roller mechanism 6 consists of a support roller 61, a first silent bearing 62, a pressure limiting roller 63, a rubber sleeve 64, and a second silent bearing 65. This facilitates the cooperation of the support roller 61 and the rubber sleeve 64 to support the seat belt 3. The first silent bearing 62 installed at both ends of the support roller 61 and the second silent bearing 65 installed at both ends of the pressure limiting roller 63 reduce the noise when the support roller 61 and the pressure limiting roller 63 rotate, thus achieving silent operation of the seat belt retractor.

[0026] Specifically, the sound-absorbing panel 4 includes a polyester fiber cotton layer 41, a basalt wool layer 42, and a melamine sound-absorbing sponge layer 43, which are bonded and fixed from the inside out. The surfaces of the polyester fiber cotton layer 41, the basalt wool layer 42, and the melamine sound-absorbing sponge layer 43 are all provided with honeycomb holes. The maximum inner diameter of the honeycomb holes in the polyester fiber cotton layer 41 is 1 cm, and the distance between two adjacent honeycomb holes on the polyester fiber cotton layer 41 is 2 cm. The maximum inner diameter of the honeycomb holes in the basalt wool layer 42 is 0.8 cm, and the distance between two adjacent honeycomb holes on the basalt wool layer 42 is 1.6 cm. The maximum inner diameter of the honeycomb holes in the melamine sound-absorbing sponge layer 43 is 0.5 cm, and the distance between two adjacent honeycomb holes on the melamine sound-absorbing sponge layer 43 is 1 cm.

[0027] In this embodiment, a sound-absorbing panel 4 is composed of a polyester fiber cotton layer 41, a basalt wool layer 42, and a melamine sound-absorbing sponge layer 43. All three layers are provided with honeycomb holes to facilitate the absorption of noise generated by the retractor body 2.

[0028] Specifically, the sound-absorbing cover 5 includes a polyurethane foam layer 51, a rubber and plastic sound insulation layer 52, and an aluminum foil layer 53, which are bonded and fixed from the inside out. The surfaces of the polyurethane foam layer 51 and the rubber and plastic sound insulation layer 52 are provided with honeycomb holes. The maximum inner diameter of the honeycomb holes in the polyurethane foam layer 51 is 0.3 cm, and the distance between two adjacent honeycomb holes on the polyurethane foam layer 51 is 0.6 cm. The maximum inner diameter of the honeycomb holes in the rubber and plastic sound insulation layer 52 is 0.15 cm, and the distance between two adjacent honeycomb holes on the rubber and plastic sound insulation layer 52 is 0.3 cm.

[0029] In this embodiment, the polyurethane foam layer 51, the rubber and plastic sound insulation layer 52, and the aluminum foil layer 53 form a sound-absorbing cover 5, so that the aluminum foil layer 53 supports the rubber and plastic sound insulation layer 52 and the polyurethane foam layer 51. At the same time, the polyurethane foam layer 51 and the rubber and plastic sound insulation layer 52 work together to absorb sound and reduce the noise of the seat belt retractor.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-noise, quiet-operating seat belt retractor, comprising a base plate (1), on which a retractor body (2) for winding a seat belt (3) is mounted, characterized in that: The outer side of the retractor body (2) is equipped with a sound-absorbing plate (4) for sound absorption, and the surface of the base plate (1) is equipped with a sound-absorbing cover (5) for sound absorption. The sound-absorbing cover (5) wraps the retractor body (2) and the sound-absorbing plate (4). The retractor body (2) is equipped with a guide roller mechanism (6) for guiding the safety belt (3). The safety belt (3) passes through the holes opened on the surface of the sound-absorbing plate (4) and the sound-absorbing cover (5). The guide roller mechanism (6) includes a support roller (61) and a pressure limiting roller (63) parallel to the winding shaft of the winding body (2). A first silent bearing (62) for the rotation of the support roller (61) is installed on the inner surface of the winding body (2), and a second silent bearing (65) for the rotation of the pressure limiting roller (63) is installed on the outer surface of the winding body (2). A rubber sleeve (64) is fixed in the middle of the pressure limiting roller (63), and the safety belt (3) is set between the support roller (61) and the rubber sleeve (64).

2. The low-noise, silent operation seat belt retractor according to claim 1, characterized in that: The sound-absorbing panel (4) includes a polyester fiber cotton layer (41), a basalt cotton layer (42), and a melamine sound-absorbing sponge layer (43) that are bonded and fixed from the inside to the outside.

3. The low-noise, silent operation seat belt retractor according to claim 2, characterized in that: The surfaces of the polyester fiber cotton layer (41), the basalt wool layer (42), and the melamine sound-absorbing sponge layer (43) are all provided with honeycomb pores. The maximum inner diameter of the honeycomb pores in the polyester fiber cotton layer (41) is 1 cm, and the distance between two adjacent honeycomb pores on the polyester fiber cotton layer (41) is 2 cm. The maximum inner diameter of the honeycomb pores in the basalt wool layer (42) is 0.8 cm, and the distance between two adjacent honeycomb pores on the basalt wool layer (42) is 1.6 cm. The maximum inner diameter of the honeycomb pores in the melamine sound-absorbing sponge layer (43) is 0.5 cm, and the distance between two adjacent honeycomb pores on the melamine sound-absorbing sponge layer (43) is 1 cm.

4. The low-noise, silent operation seat belt retractor according to claim 1, characterized in that: The sound-absorbing cover (5) includes a polyurethane foam layer (51), a rubber and plastic sound insulation layer (52), and an aluminum foil layer (53) that are bonded and fixed from the inside to the outside.

5. The low-noise, silent operation seat belt retractor according to claim 4, characterized in that: The surfaces of the polyurethane foam layer (51) and the rubber and plastic sound insulation layer (52) are provided with honeycomb holes. The maximum inner diameter of the honeycomb hole in the polyurethane foam layer (51) is 0.3 cm, and the distance between two adjacent honeycomb holes on the polyurethane foam layer (51) is 0.6 cm. The maximum inner diameter of the honeycomb hole in the rubber and plastic sound insulation layer (52) is 0.15 cm, and the distance between two adjacent honeycomb holes on the rubber and plastic sound insulation layer (52) is 0.3 cm.

Images