CN212098758U - Seat belt retractor and seat belt assembly - Google Patents
Seat belt retractor and seat belt assembly Download PDFInfo
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- CN212098758U CN212098758U CN201922402313.0U CN201922402313U CN212098758U CN 212098758 U CN212098758 U CN 212098758U CN 201922402313 U CN201922402313 U CN 201922402313U CN 212098758 U CN212098758 U CN 212098758U
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Abstract
The utility model provides a safety belt coiler and safety belt assembly of the shake of pretension side shaft when reducing the safety belt pull to reduce the interference noise that the safety belt coiler sent, promote passenger's the car and experience. The utility model provides a safety belt coiler for the roll-up safety belt, a serial communication port, include: a frame; the safety belt reel is used for reeling a safety belt and comprises a coil spring side shaft which is rotatably arranged on the frame and a pre-tightening side shaft connected with the coil spring side shaft; and the reel control part is arranged on the frame, is matched with the coil spring side shaft and is used for controlling the winding of the safety belt reel, and the elastic force limiting part is arranged on the frame, is in interference fit with the frame, is in elastic fit with the pre-tightening side shaft and is used for buffering and limiting force on the pre-tightening side shaft.
Description
Technical Field
The utility model relates to a safety belt technical field, concretely relates to safety belt coiler and safety belt assembly.
Background
In the process that a passenger wears the safety belt or in the driving process, the safety belt retractor often generates noise with interference due to road bumping and vibration of a vehicle body, and the NVH of the vehicle is improved.
Referring to fig. 4, two ends of a safety belt reel 3 are respectively a coil spring side shaft 3.1 and a pre-tightening side shaft 3.2, the coil spring side shaft 3.1 and a mandrel 2 are connected into a whole, the coil spring side shaft 3.1 and the mandrel 2 rotate together, the mandrel 2 and a coil spring cover assembly 1 are tightly matched, the coil spring cover assembly 1 is fixed on a U-shaped frame 4, the pre-tightening side shaft 3.2 and a supporting block 5 are in clearance fit, the supporting block 5 and a steel pipe assembly 6 are connected into a whole, the steel pipe assembly 6 is fixed on the U-shaped frame 4, and the U-shaped frame 4 is fixed on a vehicle body. Fig. 5 is a schematic structural view of an elastic force limiting portion in a conventional seatbelt retractor, and it can be seen that the preload side shaft 3.2 is in clearance fit with the support block 5.
When a passenger wears a safety belt, a pulling braid (not shown in the figure) drives the safety belt reel 3 to rotate, the coil spring side shaft 3.1 of the safety belt reel 3 drives the mandrel 2 to rotate, the mandrel 2 and the coil spring cover assembly 1 are in tight fit, and a gap exists between the pre-tightening side shaft 3.2 of the safety belt reel 3 and the supporting block 5, so that the pre-tightening side shaft 3.2 can impact the supporting block 5 to generate a shaking phenomenon when the braid is pulled, and meanwhile, the noise of 'guru gruu' is generated. Further alternatively, when the vehicle runs on a bumpy road surface or the vehicle body itself vibrates, the preload-side shaft 3.2 of the seatbelt reel 3 strikes the support block 5 to generate vibration noise because the preload-side shaft 3.2 is in clearance fit with the support block 5.
Therefore, a seat belt retractor and a seat belt assembly capable of reducing the interference noise generated by the seat belt retractor are urgently needed, so that the passenger experience is improved.
SUMMERY OF THE UTILITY MODEL
Therefore, in order to overcome the shortcoming of above-mentioned prior art, the utility model provides a safety belt coiler and safety belt assembly of the shake of pretension side axle when reducing the safety belt pull to reduce the interference noise that the safety belt coiler sent, promote passenger's the car and experience.
In order to achieve the above object, the utility model provides a safety belt retractor for the winding safety belt, a serial communication port, include: a frame; the safety belt reel is used for reeling a safety belt and comprises a coil spring side shaft which is rotatably arranged on the frame and a pre-tightening side shaft connected with the coil spring side shaft; and the reel control part is arranged on the frame, is matched with the coil spring side shaft and is used for controlling the winding of the safety belt reel, and the elastic force limiting part is arranged on the frame, is in interference fit with the frame, is in elastic fit with the pre-tightening side shaft and is used for buffering and limiting force on the pre-tightening side shaft.
A seatbelt retractor in one embodiment, characterized in that: wherein, elasticity limit force portion contains: the fixing piece is fixed on the frame and provided with an axial cylindrical surface part and a hollow radial annular part, the cylindrical surface part is connected with the inner circle of the annular part, the pre-tightening side shaft penetrates through the cylindrical surface part, and the cylindrical surface part is in interference fit with the frame; and the elastic components are arranged at the axial tail end of the cylindrical surface part, are uniformly distributed along the circumference of the cylindrical surface part and are in elastic fit with the pre-tightening side shaft.
A seatbelt retractor in one embodiment, characterized in that: the elastic assembly is provided with an elastic arm and a limit stop, one end of the elastic arm is connected with the cylindrical surface part, and the other end of the elastic arm extends along the radial inner side of the cylindrical surface part and is in surface contact with the outer cylindrical surface of the pre-tightening side shaft; the bottom surface of the limit stop is connected with the cylindrical surface part, extends along the axial direction of the cylindrical surface part and is used for limiting the movement of the other end of the elastic arm within a certain range.
A seatbelt retractor in one embodiment, characterized in that: the limit stop is provided with a fan ring part connected with one end of the elastic arm and a limit strip which can be contacted and matched with the other end of the elastic arm.
A seatbelt retractor in one embodiment, characterized in that: the maximum contact length of the limiting strip and the elastic arm accounts for 2/5-2/3 of the length of the limiting strip.
A seatbelt retractor in one embodiment, characterized in that: wherein, the elastic arm is provided with an inclination angle for penetrating and guiding the pre-tightening side shaft at the part close to the circular ring part.
A seatbelt retractor in one embodiment, characterized in that: wherein the number of elastic components is at least 2.
A seatbelt retractor in one embodiment, characterized in that: the frame comprises a U-shaped frame fixed on the vehicle and a steel pipe assembly fixed on the U-shaped frame, the safety belt reel is fixed on the U-shaped frame, and the steel pipe assembly is in interference fit with the elastic force limiting portion.
A seatbelt retractor in one embodiment, characterized in that: the reel control part comprises a coil spring assembly fixed on the frame and a mandrel matched with the coil spring assembly, and the mandrel is in shaft connection with the coil spring side.
This implementation li still provides a safety belt assembly, including the safety belt coiler, its characterized in that, the safety belt coiler is foretell safety belt coiler.
Compared with the prior art, the utility model has the advantages of: be provided with elasticity limit force portion, not only with frame interference fit, and with pretension side axle elastic fit, elasticity limit force portion contacts with pretension side axle all the time, prevent when the pull meshbelt or travel on the road surface of jolting, pretension side axle striking elasticity limit force portion and produce shake or vibration noise, promote passenger's the experience of using the car, and can improve the concentricity of safety belt spool through elasticity limit force portion, the safety belt spool rotates more steadily, the pulling-out and the recovery power amplitude of safety belt coiler have been reduced, the safety belt spool also is more difficult to take place to interfere with other parts and produce the friction abnormal sound. The utility model discloses a design of elasticity limit force portion need not to increase part number and extra NVH processing technology, has eliminated the interference noise that the safety belt coiler sent effectively under the same cost condition.
Drawings
Fig. 1 is a schematic structural view of a seatbelt retractor device according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an elastic force-limiting portion in an embodiment of the present invention;
fig. 3 is a schematic structural view of an elastic force-limiting portion in an embodiment of the present invention;
fig. 4 is a schematic structural view of a conventional seatbelt retractor device; and
fig. 5 is a schematic view of a structure of a support block of a conventional seatbelt retractor device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a seatbelt retractor device according to an embodiment of the present invention.
As shown in fig. 1, the present embodiment provides a seatbelt assembly, of which a seatbelt retractor 100 for retracting a seatbelt has a frame 10, a seatbelt reel 3, a reel control portion 20, and an elastic force limiting portion 7.
The frame 10 includes a U-shaped frame 4 fixed to the vehicle and a steel tube assembly 6 fixed to the U-shaped frame.
The belt reel 3 is used for reeling up a belt and includes a coil spring side shaft 3.1 rotatably provided on the frame and a pre-tightening side shaft 3.2 connected to the coil spring side shaft. A coil spring side shaft 3.1 and a preload side shaft 3.2 are arranged at both ends of the belt spool 3.
A spool control portion 20 is provided on the frame 10 in cooperation with the coil spring side shaft 3.1 for controlling the retraction of the belt by the belt spool 3. The reel control portion 20 includes a coil spring assembly 1 fixed to the frame and a spindle 2 engaged with the coil spring assembly. The coil spring assembly 1 is fixed on a U-shaped frame 4. One end of the mandrel 2 is tightly matched with the coil spring assembly 1, the other end of the mandrel 2 is connected with a coil spring side shaft 3.1 into a whole, and the coil spring side shaft 3.1 and the mandrel 2 rotate together.
The elastic force limiting part 7 is arranged on the frame 10, is in interference fit with the frame 10, is in elastic fit with the pre-tightening side shaft 3.2 and is used for buffering and limiting force on the pre-tightening side shaft. The elastic force limiting part 7 is connected with the steel pipe assembly 6.
Fig. 2 is a schematic structural diagram of an elastic force limiting portion in an embodiment of the present invention.
As shown in fig. 2, the elastic force-limiting portion 7 comprises a fixing member 7.1 and an elastic member 7.2.
The fixing element 7.1 is fixed to the frame and has an axial cylindrical surface portion 7.1.1 and a hollow radial annular portion 7.1.2. The cylindrical surface portion 7.1.1 is connected to the inner circle of the annular ring portion 7.1.2. The preload side shaft 3.2 passes through the inside of the cylindrical surface portion 7.1.1, and the cylindrical surface portion 7.1.1 is in interference fit with the frame. The cylindrical surface part 7.1.1 is in interference fit with the steel pipe assembly 6, and the radial annular part 7.1.2 plays a role in axial positioning.
Elastic members 7.2 are provided at the axial ends of the cylindrical surface portions 7.1.1 to be elastically fitted with the preload-side shafts 3.2. When the elastic component 7.2 is acted by the external force of the pre-tightening side shaft 3.2, the elastic component 7.2 can be pressed outwards along the direction far away from the pre-tightening side shaft 3.2, and when the external force is eliminated, the elastic component is restored to the original position. The elastic elements may be arranged uniformly over the circumference of the axial ends of the axial cylindrical surface portion 7.1.1, the number of elastic elements 7.2 being 2, 3 or more. The interval between two adjacent elastic components 7.2 can be 4-15 mm.
The spring arrangement 7.2 has spring arms 7.2.1 and limit stops 7.2.2. The resilient arm 7.2.1 may be of a "tongue" configuration, with one end connected to the cylindrical surface portion 7.1.1 and the other end extending radially inwardly of the cylindrical surface portion 7.1.1. And the outer cylindrical surface of the pre-tightening side shaft 3.2 is contacted with the line surface without external force.
Because the elastic arm 7.2.1 is in line-surface contact with the outer cylinder of the pre-tightening side shaft 3.2, and the pre-tightening side shaft 3.2 is always in contact with the elastic arm 7.2.1, when the woven belt is pulled out or the vehicle runs on a bumpy road surface, the pre-tightening side shaft 3.2 cannot impact the elastic arm 7.2.1 to generate shaking or vibration noise, and the vehicle using experience of passengers is improved. The elastic arm 7.2.1 has elasticity, and the line surface contact is made with the outer cylinder of the pre-tightening side shaft 3.2, so the problem that the safety belt is not comfortable when the safety belt is worn due to the fact that the pulling force and the recovery force of the retractor are possibly increased is avoided, and the pulling force and the recovery force are not increased and the wearing comfort is not influenced through experimental verification.
The bottom surface of the limit stop 7.2.2 is connected with the cylindrical surface part 7.1.1, extends along the axial direction of the cylindrical surface part 7.1.1 and is used for limiting the movement of the other end of the elastic arm 7.2.1 within a certain range. The limit stop 7.2.2 is arranged on an axial cylindrical surface portion 7.1.1 of the elastic arm 7.2.1 in the direction of extrusion thereof, and can control the elastic stroke of the elastic arm 7.2.1. The thickness of the limit stop 7.2.2 is proportional to the elastic thread of the elastic arm 7.2.1, and the elastic stroke of the elastic arm 7.2.1 can be adjusted by changing the thickness of the limit stop 7.2.2. The limit stop 7.2.2 also plays a role in protecting the elastic arm 7.2.1, and prevents the elastic arm 7.2.1 from being seriously extruded and broken when being acted by strong external force. The limit stop 7.2.2 has a sector ring portion 7.2.2.1 connected to one end of the resilient arm 7.2.1 and a limit strip 7.2.2.2 contactable and matable with the other end of the resilient arm. The sector ring portion 7.2.2.1 of the bump stop 7.2.2 can be connected to a resilient arm in another pair of resilient members. The limit strips 7.2.2.2 can be wavy and are matched with the tongue shape of the elastic arms 7.2.1; or may be arc-shaped to match the tongue shape of the resilient arm 7.2.1. The maximum contact length of the limiting strip 7.2.2.2 and the elastic arm 7.2.1 accounts for 2/5-2/3 of the length of the limiting strip 7.2.2.2. In one embodiment, the length of the stopper 7.2.2.2 is 1mm, and the maximum contact length of the stopper 7.2.2.2 with the spring arm 7.2.1 is 0.4mm (the length of contact after full fit).
Fig. 3 is a schematic structural diagram of an elastic force limiting portion in an embodiment of the present invention.
As shown in fig. 3, the spring arms 7.2.1 are provided with an angle of inclination 7.3 for guiding near the ring portion 7.1.2, i.e. the spring arms 7.2.1 are provided with an angle of inclination 7.3 near the pretension side shaft 3.2. This angle of inclination 7.3 facilitates the insertion of the pretension-side shaft 3.2 into the elastic force limiter 7. In addition, the preload-side shaft 3.2 can be inserted into the elastic force limiter 7 relatively easily in conjunction with the elasticity of the elastic arm 7.2.1. The angle of the inclination angle 7.3 can be any value of 45-75 degrees.
When a passenger wears a safety belt, a pulling braid (not shown in the figure) drives the safety belt reel 3 to rotate, the coil spring side shaft 3.1 of the safety belt reel 3 drives the mandrel 2 to rotate, the mandrel 2 and the coil spring assembly 1 are in tight fit, and the pre-tightening side shaft 3.2 of the safety belt reel 3 is always in contact with the elastic arm 7.2.1 of the elastic force limiting part 7, namely, the coil spring side shafts 3.1 and the pre-tightening side shafts 3.2 at two ends of the safety belt reel 3 can not move in the radial direction when the braid is pulled, so that the shaking phenomenon occurring when the braid is pulled is avoided, and meanwhile, the gurgling noise caused by shaking is also avoided.
When the vehicle runs on a bumpy road surface or the vehicle body generates vibration, the pre-tightening side shaft 3.2 of the safety belt reel 3 is always in contact with the elastic arm 7.2.1 of the elastic force limiting part 7, and the pre-tightening side shaft 3.2 cannot impact the elastic arm 7.2.1 to generate vibration noise.
In the production and manufacturing process of the retractor, the mandrel 2 for restraining the coil spring side shaft 3.1 and the elastic force limiting part 7 for restraining the pre-tightening side shaft 3.2 are difficult to ensure coaxiality, but the elastic force limiting part 7 comprises elastic arms 7.2.1, the elastic arms 7.2.1 which are uniformly distributed can realize correction of coaxiality of two ends of the safety belt reel 3 by adjusting the pre-tightening side shaft 3.2 by means of elasticity of the elastic arms, the safety belt reel 3 is guaranteed to rotate more stably when the mesh belt is pulled out, the pulling-out and recovery force amplitude of the retractor is reduced, and the safety belt reel 3 is less prone to generate friction abnormal sound due to interference with other parts.
The bottom features 7.3 of the resilient arms 7.2.1 may be at a more oblique angle, serving as a guide for the insertion of the pre-tightening side shaft 3.2 into the resilient force limiting portion 7. The coupling spring arm 7.2.1 is resilient, and the preload-side shaft 3.2 can be easily inserted into the spring force limiter 7.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A seat belt retractor for retracting a seat belt, comprising:
a frame;
the safety belt reel is used for reeling a safety belt and comprises a coil spring side shaft which is rotatably arranged on the frame and a pre-tightening side shaft connected with the coil spring side shaft; and
a reel control part arranged on the frame, matched with the coil spring side shaft and used for controlling the coiling of the safety belt by the safety belt reel,
and the elastic force limiting part is arranged on the frame, is in interference fit with the frame, is in elastic fit with the pre-tightening side shaft, and is used for buffering and limiting force on the pre-tightening side shaft.
2. The seatbelt retractor according to claim 1, wherein:
wherein, elasticity limit force portion contains:
the fixing piece is fixed on the frame and provided with an axial cylindrical surface part and a hollow radial annular part, the cylindrical surface part is connected with the inner circle of the annular part, the pre-tightening side shaft penetrates through the cylindrical surface part, and the cylindrical surface part is in interference fit with the frame; and
and the elastic assemblies are arranged at the axial tail end of the cylindrical surface part, are uniformly distributed along the circumference of the cylindrical surface part and are in elastic fit with the pre-tightening side shaft.
3. The seatbelt retractor according to claim 2, wherein:
wherein the elastic component is provided with an elastic arm and a limit stop,
one end of the elastic arm is connected with the cylindrical surface part, and the other end of the elastic arm extends along the radial inner side of the cylindrical surface part and is in surface contact with the outer cylindrical surface of the pre-tightening side shaft;
the bottom surface of the limit stop is connected with the cylindrical surface part, extends along the axial direction of the cylindrical surface part and is used for limiting the movement of the other end of the elastic arm within a certain range.
4. The seatbelt retractor according to claim 3, wherein:
the limit stop is provided with a fan ring part connected with one end of the elastic arm and a limit strip which can be contacted and matched with the other end of the elastic arm.
5. The seatbelt retractor according to claim 4, wherein:
the maximum contact length of the limiting strip and the elastic arm accounts for 2/5-2/3 of the length of the limiting strip.
6. The seatbelt retractor according to any one of claims 3 to 5, wherein:
wherein, the elastic arm is provided with an inclination angle for penetrating and guiding the pre-tightening side shaft at the part close to the circular ring part.
7. The seatbelt retractor according to any one of claims 2 to 5, wherein:
wherein the number of elastic components is at least 2.
8. The seatbelt retractor according to any one of claims 1 to 5, wherein:
wherein the frame comprises a U-shaped frame fixed on the vehicle and a steel pipe component fixed on the U-shaped frame,
the safety belt reel is fixed on the U-shaped frame, and the steel pipe assembly is in interference fit with the elastic force limiting part.
9. The seatbelt retractor according to any one of claims 1 to 5, wherein:
the reel control part comprises a coil spring assembly fixed on the frame and a mandrel matched with the coil spring assembly, and the mandrel is in shaft connection with the coil spring side.
10. A seat belt assembly comprising a seat belt retractor, wherein the seat belt retractor is as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922402313.0U CN212098758U (en) | 2019-12-27 | 2019-12-27 | Seat belt retractor and seat belt assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922402313.0U CN212098758U (en) | 2019-12-27 | 2019-12-27 | Seat belt retractor and seat belt assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212098758U true CN212098758U (en) | 2020-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922402313.0U Active CN212098758U (en) | 2019-12-27 | 2019-12-27 | Seat belt retractor and seat belt assembly |
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| CN (1) | CN212098758U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113147662A (en) * | 2021-04-06 | 2021-07-23 | 重庆光大产业有限公司 | Integrated pre-tightening force-limiting type retractor |
-
2019
- 2019-12-27 CN CN201922402313.0U patent/CN212098758U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113147662A (en) * | 2021-04-06 | 2021-07-23 | 重庆光大产业有限公司 | Integrated pre-tightening force-limiting type retractor |
| CN113147662B (en) * | 2021-04-06 | 2022-06-17 | 重庆光大产业有限公司 | Integrated pre-tightening force-limiting type retractor |
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