Automobile safety belt retractor

Abstract

The utility model discloses an automobile safety belt retractor which comprises a winding support, a winding shaft and an assembling base, an assembling through hole is formed in the assembling base, a pin shaft is inserted into the assembling through hole in a penetrating mode, the assembling through hole penetrates through the inner side face and the outer side face of the assembling base, the inner side of the assembling base extends inwards to form an inner protruding part, and an inner through hole is formed in the middle of the inner protruding part. The outer side of the assembling base extends outwards to form an outer protruding part, and an outer through hole is formed in the middle of the outer protruding part. An inner guide groove is formed in the front end face of the inner convex part, the inner guide groove is provided with an inner guide bottom wall and inner guide side walls located on the two sides of the inner guide bottom wall, and the two inner guide side walls extend towards the inner wall of the inner through hole; an outer guide groove is formed in the lower end face of the outer convex part, the outer guide groove is provided with an outer guide bottom wall and outer guide side walls located on the two sides of the outer guide bottom wall, and the two outer guide side walls extend towards the inner wall of the outer through hole; according to the utility model, the bearing capacity of the assembling seat to the pin shaft can be enhanced, so that the pin shaft is more stably arranged in the through hole of the assembling seat, and the assembling and disassembling performance between the assembling seat and the pin shaft is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to an automobile safety belt retractor. Background Art

[0002] The automobile seat belt is a safety device for restraining and protecting the driver and passengers in the event of a collision. It includes a retractor, a braided belt, and a buckle. The retractor is used to reel in the braided belt. During use, the braided belt needs to be frequently reeled in and out of the retractor. In order to reduce the wear between the braided belt and the retractor body, a guide sleeve that guides the reeling and unreeling of the braided belt needs to be installed on the retractor. Currently, there are several ways to connect the guide sleeve and the retractor. For example, a retractor webbing anti-pinch guide sleeve disclosed in Chinese Patent No. 202020095854.3 realizes the clamping connection of the guide sleeve body to the retractor through the cooperation of the hook and the hole. For example, in the retractor with a simple guide disclosed in Chinese Patent No. 201320663704.8, the guide sleeve is hinged on the frame through the cooperation of the rotating shaft and the rotating hole.

[0003] After use, it was found that the guide sleeve of the card-connection method has a small movable angle, and the hook often rubs during long-term swinging, which increases the risk of damage; the pin method can obtain a larger swing angle, but in order to ensure the assembly stability between the guide sleeve and the reel, the pin and the rotating hole have a certain assembly strength to avoid the risk of the pin and the rotating hole being separated, but this affects the convenience of assembling the pin and the rotating hole. Based on this, further research is needed on the assembly structure of the guide sleeve and the reel bracket. Summary of the invention

[0004] In view of the above problems, the purpose of the utility model is to provide a car safety belt retractor which is convenient for assembling and disassembling the belt guide component.

[0005] A car seat belt retractor comprises a reeling bracket, a reeling shaft rotatably assembled in the reeling bracket, the left end of the reeling shaft extends to one outer side of the reeling bracket, and the right end extends to the other outer side of the reeling bracket, the left side of the reeling bracket is clamped with a vehicle sensing component end cover, the right side of the reeling bracket is clamped with a reeling spring end cover, a belt guide component is rotatably assembled on the reeling bracket through a pin shaft, the vehicle sensing component end cover and the reeling spring end cover are respectively fixedly provided with assembly seats symmetrically arranged with respect to the center line of the reeling bracket, the assembly seats are respectively provided with circular assembly through holes forming a coaxial line, and the pin shafts are inserted into the assembly through holes;

[0006] The assembly through hole passes through the inner and outer side surfaces of the assembly seat, the inner side of the assembly seat extends inwardly to form an inner convex portion, and the middle of the inner convex portion is provided with an inner through hole; the outer side of the assembly seat extends outwardly to form an outer convex portion, and the middle of the outer convex portion is provided with an outer through hole; the inner through hole, the outer through hole, and the assembly through hole are coaxial and form a through line;

[0007] An inner guide groove is provided on the front end surface of the inner convex portion, and the inner guide groove has an inner guide bottom wall and inner guide side walls on both sides of the inner guide bottom wall, and the two inner guide side walls extend toward the inner wall of the inner through hole; the inner guide bottom wall is inclined from the front end surface of the inner convex portion toward the inner side of the inner convex portion, forms a cutout on the front inner wall of the inner through hole, and intersects with the front inner wall of the inner through hole, and the intersection of the inner guide bottom wall and the inner wall of the inner through hole is not higher than the inner side surface of the inner convex portion;

[0008] An outer guide groove is provided on the lower end surface of the outer convex portion, and the outer guide groove has an outer guide bottom wall and outer guide side walls on both sides of the outer guide bottom wall, and the two outer guide side walls extend toward the inner wall of the outer through hole; the outer guide bottom wall is inclined from the lower end surface of the outer convex portion toward the outside of the outer convex portion, forms a cutout on the inner wall below the outer through hole, and intersects with the inner wall below the outer through hole, and the intersection of the outer guide bottom wall and the inner wall of the outer through hole is not higher than the outer side surface of the outer convex portion.

[0009] As a further embodiment, the distance between the two inner guide side walls and / or the distance between the two outer guide side walls is not less than the outer diameter of the pin shaft.

[0010] As a further implementation scheme, pins are fixed at both ends of the guide belt component, and the pins extend into the outer through hole through the inner through hole and the assembly through hole. The end face of the pin does not exceed the intersection of the outer guide bottom wall and the inner wall of the outer through hole.

[0011] As a further implementation scheme, the belt guide component includes a belt cover body, a belt guide channel is formed inside the belt cover body, the inner end of the belt guide channel is the safety belt entry end, and the outer end of the belt guide channel is the safety belt withdrawal end; fixed blocks extending downward are fixedly arranged on both sides of the lower surface of the belt cover body near the safety belt entry end, and the pin shaft is fixed to the outer side of the fixed block;

[0012] A connecting protrusion is fixedly formed on the lower surface of the belt cover body near the lower end of the safety belt entry end. The connecting protrusion is arranged along the width direction of the belt cover body, and is connected to the inner side of the fixing block. The end size of the connecting protrusion near the fixing block is larger than the middle size of the connecting protrusion; the connecting surface between the connecting protrusion and the fixing block is on the extension section of the pin shaft.

[0013] As a further embodiment, the belt cover body below the safety belt entry end outwardly exceeds the belt cover body above the safety belt entry end, and the exceeding portion is an arc-shaped segment curved downward;

[0014] The outer wall of the arc segment is provided with a raised strip with a semicircular cross section and arranged along the width direction of the arc segment. The plane formed by the bottom edge of the raised strip with a semicircular cross section is combined with the outer wall of the arc segment.

[0015] By adopting the above technical solution, the utility model produces the following technical effects:

[0016] 1. The inner convex part and the outer convex part extending from the side of the assembly seat can enhance the bearing capacity of the assembly seat on the pin shaft, so that the pin shaft can be installed in the through hole of the assembly seat more stably.

[0017] 2. The design of the inner through hole and the inner guide groove on the inner protrusion facilitates the introduction of the pin end into the assembly through hole, and the design of the outer through hole and the outer guide groove on the outer protrusion facilitates the disassembly of the pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 for Figure 1 A right view structural diagram of ;

[0020] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0021] Figure 4 It is a side view structural schematic diagram of the utility model;

[0022] Figure 5 It is a schematic diagram of the internal structure of the utility model;

[0023] Figure 6 It is a bottom view structural schematic diagram of the guide belt component in the utility model;

[0024] Figure 7 for Figure 6 Middle AA section view;

[0025] Figure 8 It is a side view structural schematic diagram of the guide belt component in the utility model;

[0026] Fig. 9 It is an enlarged schematic diagram of the assembly seat in the utility model;

[0027] Fig.10 for Fig. 9 Schematic diagram of the left view structure;

[0028] In the accompanying drawings, 10, winding bracket, 11, winding shaft, 12, vehicle sensing component end cover, 13, retractor spring end cover, 14, pin shaft, 15, assembly seat, 16, belt guide component, 17, left support plate, 18, right support plate, 19, top support plate, 20, bottom support plate, 21, inner convex portion, 22, inner through hole, 23, outer convex portion, 24, outer through hole, 25, inner guide groove, 26, inner guide bottom wall, 27, inner guide side wall, 28, outer guide groove, 29, outer guide bottom wall, 30, outer guide side wall, 31, belt cover body, 32, belt guide channel, 33, safety belt entry end, 34, safety belt pull-out end, 35, fixing block, 36, connecting protrusion, 37, arc segment, 38, protruding strip, 39, protruding rib. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-10 The invention discloses a car seat belt retractor, comprising a reeling bracket 10 and a reeling shaft 11 rotatably mounted in the reeling bracket 10. The reeling shaft 11 is used to reel in the seat belt webbing. The left end of the reeling shaft 11 extends to one outer side of the reeling bracket 10, and the right end extends to the other outer side of the reeling bracket 10, so that the reeling shaft 11 can rotate on the reeling bracket 10 about the axis of the reeling shaft 11. A vehicle sensing component end cover 12 is clamped on the left side of the reeling bracket 10, and a reeling spring end cover 13 is clamped on the right side of the reeling bracket 10. The vehicle sensing component end cover 12 and the reeling spring end cover 13 are clamped on the reeling bracket 10. A belt guide component 16 is rotatably mounted on the reeling bracket 10 through a pin shaft 14. The vehicle sensing component end cover and the reeling spring end cover are respectively fixed with a center line (such as Figure 3 The dotted lines shown in the figure show symmetrically arranged assembly seats 15, and the assembly seats 15 are respectively provided with circular assembly through holes forming a coaxial line, and the pins 14 are inserted into the assembly through holes, and the pins 14 can rotate in the assembly through holes.

[0031] Among them, the winding bracket 10 includes a left support plate 17, a right support plate 18, a top support plate 19, and a bottom support plate 20. The left support plate 17 and the right support plate 18 are arranged with left and right intervals. The top support plate 19 is fixed to the top of the left support plate 17 and the top of the right support plate 18, so that the top of the left support plate 17 and the top of the right support plate 18 are fixedly connected. The bottom support plate 20 is fixed to the bottom of the left support plate 17 and the bottom of the right support plate 18, so that the bottom of the left support plate 17 and the bottom of the right support plate 18 are fixedly connected. The end cover of the vehicle sensing component is assembled on the outer side of the left support plate 17, and the end cover of the retractor spring is assembled on the outer side of the right support plate 18.

[0032] The assembly seat 15 is vertically located in front of the winding support 10, and has inner and outer sides; the assembly through hole penetrates the inner and outer sides of the assembly seat 15, and the inner side of the assembly seat 15 extends inwardly to form an inner convex portion 21 larger than the inner diameter of the assembly hole, and the thickness of the inner convex portion 21 is similar to the thickness of the assembly seat 15, and an inner through hole 22 is provided in the middle of the inner convex portion 21; the outer side of the assembly seat 15 extends outwardly to form an outer convex portion 23 larger than the inner diameter of the assembly hole, and the thickness of the outer convex portion 23 is similar to the thickness of the assembly seat 15, and an outer through hole 24 is provided in the middle of the outer convex portion; the inner diameters of the inner through hole 22 and the outer through hole 24 can be the same as the inner diameter of the assembly through hole, and the inner through hole 22, the outer through hole 24, and the assembly through hole are coaxial and form a through hole. The design of the inner through hole 22 facilitates the introduction of the end of the pin shaft 14 toward the assembly through hole, and the design of the outer through hole 24 facilitates the disassembly of the pin shaft 14.

[0033] Among them, the front end surface of the inner convex part 21 is provided with an inner guide groove 25, and the inner guide groove 25 has an inner guide bottom wall 26 and inner guide side walls 27 on both sides of the inner guide bottom wall 26, and the two inner guide side walls 27 extend toward the inner wall of the inner through hole 22; the inner guide bottom wall 26 is inclined from the front end surface of the inner convex part 21 toward the inner side of the inner convex part 21, forms a cutout on the front inner wall of the inner through hole 22, and intersects with the front inner wall of the inner through hole 22, and the intersection of the inner guide bottom wall 26 and the inner wall of the inner through hole 22 is not higher than the inner side surface of the inner convex part 21; when the pin shaft 14 is assembled, the end of the pin shaft 14 is inserted from the front end of the inner guide groove 25, and is introduced into the inner through hole 22 through the inner guide groove 25. When the pin shaft 14 is introduced toward the inner through hole 22, it is blocked by the inner side surface of the inner convex part 21, so that the end of the pin shaft 14 can be smoothly ensured to stably pass through the inner through hole 22 into the assembly through hole and extend toward the outer through hole 24.

[0034] Among them, an outer guide groove 28 is opened on the lower end surface of the outer protrusion 23, and the outer guide groove 28 has an outer guide bottom wall 29 and outer guide side walls 30 on both sides of the outer guide bottom wall 29, and the two outer guide side walls 30 extend toward the inner wall of the outer through hole 24; the outer guide bottom wall 29 is inclined from the lower end surface of the outer protrusion 23 toward the outside of the outer protrusion 23, forming a cutout on the inner wall below the outer through hole 24, and intersecting with the inner wall below the outer through hole 24, and the intersection of the outer guide bottom wall 29 and the inner wall of the outer through hole 24 is not higher than the outer side surface of the outer protrusion 23. The end of the pin shaft 14 is in the outer through hole 24, but is not exposed as a through hole. During disassembly, a tool (screwdriver) is inserted from the outer guide groove 28 to guide the tool toward the outer through hole 24. The tool presses against the end face of the pin shaft 14 and applies a certain thrust from the outside to the inside along the axial direction of the pin shaft 14. The pin shaft 14 can be pushed out of the outer through hole 24, the assembly through hole, and the inner through hole 22 in turn, which is convenient for disassembly. In addition, by setting the inner convex portion 21 and the outer convex portion 23, the thickness of the assembly seat 15 is increased to a certain extent, and the strength of the assembly seat 15 is correspondingly enhanced, which improves the bearing capacity of the assembly seat 15 on the pin shaft 14 to a certain extent.

[0035] In some implementations, the distance between the two inner guide side walls 27 or / and the distance between the two outer guide side walls 30 is not less than the outer diameter of the pin 14. For example, when the pin 14 is inserted into the assembly through hole, it can smoothly enter the outer through hole 24 first and then enter the assembly through hole through the guidance of the outer guide side wall 30 and the outer guide bottom wall 29, so as to facilitate and quickly install.

[0036] In some implementations, pins 14 are fixed at both ends of the guide belt component 16. The pins 14 extend into the outer through hole 24 through the inner through hole 22 and the assembly through hole. The end face of the pin 14 does not exceed the intersection of the outer guide bottom wall 29 and the inner wall of the outer through hole 24. Therefore, when the tool enters the outer through hole 24 through the outer guide groove 28, it can stably slide to the end face of the pin 14, making it easy to apply external force to push the pin 14 inward.

[0037] In some embodiments, the belt guide component 16 includes a belt cover body 31, a belt guide channel 32 is formed inside the belt cover body 31, the inner end of the belt guide channel 32 is a safety belt entry end 33, and the outer end of the belt guide channel 32 is a safety belt withdrawal end 34; a fixing block 35 extending downward is fixedly provided on both sides of the lower surface of the belt cover body 31 near the safety belt entry end 33, and the pin shaft 14 is fixed to the outer side of the fixing block 35;

[0038] In order to enhance the connection strength between the fixing blocks 35 on both sides of the belt cover body 31, a connecting protrusion 36 is fixedly formed on the lower surface of the belt cover body 31 near the lower side of the safety belt entry end 33. The connecting protrusion 36 is arranged along the width direction of the belt cover body 31, and the connecting protrusion 36 is connected to the inner side of the fixing block 35. Through the arrangement of the connecting protrusion 36, the two fixing blocks 35 are integrally connected, and the connecting protrusion 36 effectively supports the fixing block 35. The end size of the connecting protrusion 36 near the fixing block 35 is larger than the middle size of the connecting protrusion 36. The connection area between the connecting protrusion 36 and the fixing block 35 is increased to enhance the effective support of the connecting protrusion 36 on the fixing block 35; the connecting surface between the connecting protrusion 36 and the fixing block 35 is located on the extension section of the pin 14, so that under the support of the connecting protrusion 36 on the fixing block 35, it can also form effective support for the pin 14 at the same time, thereby improving the stability of the guide component 16 when it penetrates the assembly through hole, and reducing the risk of deformation of the belt sleeve body 31 and detachment of the pin 14 from the assembly through hole during the pulling of the braided belt due to the low support force for the pin 14 and the fixing block 35.

[0039] In some embodiments, the belt sleeve body 31 below the safety belt entry end 33 extends outwardly beyond the belt sleeve body 31 above the safety belt entry end 33, and the exceeding portion is an arc segment 37 that is curved downward in an arc shape, and the arc segment 37 is close to the webbing pull-out position in the winding bracket 10, so it is necessary to increase the arc segment 37 to ensure smooth winding and unwinding of the webbing; it is used to guide the safety belt webbing to smoothly enter the belt guide channel 32, and in order to enhance the overall strength of the arc segment 37, the outer wall of the arc segment 37 has a raised strip 38 with a semicircular cross-section arranged along the width direction of the arc segment 37, and the plane formed by the bottom edge of the raised strip 38 with a semicircular cross-section is combined with the outer wall of the arc segment 37 to further increase the connection surface between the raised strip 38 and the arc segment 37, thereby enhancing the reinforcing ability of the raised strip 38 on the arc segment 37.

[0040] In some implementations, the upper and lower outer walls of the seat belt pull-out end 34 of the belt guide channel 32 respectively have raised ribs 39, and the raised ribs 39 are arranged along the width direction of the seat belt pull-out end 34. The raised ribs 39 also adopt a semicircular cross-section structure, and the semicircular bottom edge is combined with the outer wall of the seat belt pull-out end 34 to enhance the bonding strength and improve the reinforcement ability of the raised ribs 39 on the seat belt pull-out end 34.

[0041] In some implementations, the assembly seat 15 and the winding bracket 10 can be integrally formed, or can be fixedly connected by welding, or can be fixedly connected by connecting members such as screws / bolts.

[0042] In some implementations, the diameter of the inner through hole 22 can be slightly larger than the inner diameter of the assembly through hole, or the inner through hole 22 can be designed as a tapered through hole, with the end of the tapered through hole with a smaller diameter being connected to the assembly through hole, and the diameter of the end of the tapered through hole with a smaller diameter being equal to the inner diameter of the assembly through hole, so that when the pin shaft 14 is installed, the end of the pin shaft 14 can be smoothly guided from the inner through hole 22 to the assembly through hole.

[0043] Finally, it should be noted that the above embodiments are merely preferred embodiments of the present invention to illustrate the technical solution of the present invention, but are not intended to limit the technical solution, let alone the patent scope of the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention. In addition, the direct or indirect application of the technical solution of the present invention in other related technical fields is also included in the patent protection scope of the present invention.

Claims

1. A car seat belt retractor, comprising a reeling bracket, a reeling shaft rotatably assembled in the reeling bracket, the left end of the reeling shaft extending to one outer side of the reeling bracket, and the right end extending to the other outer side of the reeling bracket, the left side of the reeling bracket is clamped with a vehicle sensing component end cover, the right side of the reeling bracket is clamped with a reel spring end cover, a belt guide component is rotatably assembled on the reeling bracket through a pin shaft, the vehicle sensing component end cover and the reel spring end cover are respectively fixed with assembly seats symmetrically arranged with the center line of the reeling bracket, and circular assembly through holes forming a coaxial line are respectively opened on the assembly seats, and the pin shaft is inserted into the assembly through hole, characterized in that The assembly through hole passes through the inner and outer side surfaces of the assembly seat, the inner side of the assembly seat extends inwardly to form an inner convex portion, and the middle of the inner convex portion is provided with an inner through hole; the outer side of the assembly seat extends outwardly to form an outer convex portion, and the middle of the outer convex portion is provided with an outer through hole; the inner through hole, the outer through hole, and the assembly through hole are coaxial and form a through line; An inner guide groove is provided on the front end surface of the inner convex portion, and the inner guide groove has an inner guide bottom wall and inner guide side walls on both sides of the inner guide bottom wall, and the two inner guide side walls extend toward the inner wall of the inner through hole; the inner guide bottom wall is inclined from the front end surface of the inner convex portion toward the inner side of the inner convex portion, forms a cutout on the front inner wall of the inner through hole, and intersects with the front inner wall of the inner through hole, and the intersection of the inner guide bottom wall and the inner wall of the inner through hole is not higher than the inner side surface of the inner convex portion; An outer guide groove is provided on the lower end surface of the outer convex portion, and the outer guide groove has an outer guide bottom wall and outer guide side walls on both sides of the outer guide bottom wall, and the two outer guide side walls extend toward the inner wall of the outer through hole; the outer guide bottom wall is inclined from the lower end surface of the outer convex portion toward the outside of the outer convex portion, forms a cutout on the inner wall below the outer through hole, and intersects with the inner wall below the outer through hole, and the intersection of the outer guide bottom wall and the inner wall of the outer through hole is not higher than the outer side surface of the outer convex portion.

2. A vehicle seat belt retractor as claimed in claim 1, characterized in that: The distance between the two inner guide side walls and / or the distance between the two outer guide side walls is not less than the outer diameter of the pin shaft.

3. A vehicle seat belt retractor as claimed in claim 1, characterized in that: Pins are fixed at both ends of the guide belt component. The pins extend into the outer through hole through the inner through hole and the assembly through hole. The end surface of the pin does not exceed the intersection of the outer guide bottom wall and the inner wall of the outer through hole.

4. A vehicle seat belt retractor as claimed in claim 1, characterized in that: The belt guide component comprises a belt cover body, a belt guide channel is formed inside the belt cover body, the inner end of the belt guide channel is the safety belt entry end, and the outer end of the belt guide channel is the safety belt withdrawal end; fixed blocks extending downward are fixedly arranged on both sides of the lower surface of the belt cover body near the safety belt entry end, and the pin shaft is fixed on the outer side of the fixed block; A connecting protrusion is fixedly formed on the lower surface of the belt cover body near the lower end of the safety belt entry end. The connecting protrusion is arranged along the width direction of the belt cover body, and is connected to the inner side of the fixing block. The end size of the connecting protrusion near the fixing block is larger than the middle size of the connecting protrusion; the connecting surface between the connecting protrusion and the fixing block is on the extension section of the pin shaft.

5. The vehicle seat belt retractor according to claim 1, characterized in that: The belt cover body below the safety belt entry end extends outwardly beyond the belt cover body above the safety belt entry end, and the exceeding portion is an arc-shaped segment curved downward; The outer wall of the arc segment is provided with a raised strip with a semicircular cross section and arranged along the width direction of the arc segment. The plane formed by the bottom edge of the raised strip with a semicircular cross section is combined with the outer wall of the arc segment.

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