CN110562193B - Retractor mandrel assembly and seatbelt retractor - Google Patents
Retractor mandrel assembly and seatbelt retractor Download PDFInfo
- Publication number
- CN110562193B CN110562193B CN201910982290.7A CN201910982290A CN110562193B CN 110562193 B CN110562193 B CN 110562193B CN 201910982290 A CN201910982290 A CN 201910982290A CN 110562193 B CN110562193 B CN 110562193B
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- retractor
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- 230000000670 limiting effect Effects 0.000 claims abstract description 219
- 230000020347 spindle assembly Effects 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims description 12
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 230000009471 action Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
The invention relates to the technical field of safety belts, in particular to a retractor mandrel assembly and a safety belt retractor. The coiler mandrel assembly comprises a mandrel, a shaft head, a torsion bar, a torsion head and a plurality of force limiting rings; one end of the torsion bar is fixedly connected with one end of the mandrel, and the other end of the torsion bar is fixedly connected with the shaft head through the torsion head; the end face of the other end of the mandrel is a first end face, and a pushing assembly is arranged on the first end face; the torsion head at least partially protrudes from the first end face, and the end face of the torsion head protruding from the first end face is a second end face; the plurality of force limiting rings are overlapped along the axial direction of the torsion head and are positioned between the shaft head and the mandrel, one part of the force limiting rings is connected with the second end face, the other part of the force limiting rings is wound on the pushing component, and the pushing component can rotate along with the mandrel and push the other part of the force limiting rings to be wound on the torsion head. The seatbelt retractor includes the retractor spindle assembly. The retractor mandrel assembly and the safety belt retractor greatly improve the force limiting capacity of the mandrel.
Description
Technical Field
The invention relates to the technical field of safety belts, in particular to a retractor mandrel assembly and a safety belt retractor.
Background
In the related art, after the safety belt is locked, the spindle head and the torsion head are fixed and do not rotate, but the spindle can still rotate along with the pulling-out of the safety belt. The safety belt is usually prevented from driving the mandrel to rotate continuously by connecting the torsion bar and a force limiting ring between the torsion head and the mandrel, so that the force limiting effect is achieved.
The force limiting capability of the related art retractor mandrel assembly is not ideal. Thus, there is a need for a retractor mandrel assembly that has improved force limiting capabilities with respect to the mandrel.
Disclosure of Invention
The invention aims to provide a retractor mandrel assembly with better capacity of limiting force on a mandrel.
The invention aims to provide a safety belt retractor with better capacity of limiting force on a mandrel.
In order to achieve the above object, the present invention provides the following technical solutions;
based on the first object, the invention provides a retractor mandrel assembly, which comprises a mandrel, a shaft head, a torsion bar, a torsion head and a plurality of force limiting rings;
One end of the torsion bar is fixedly connected with one end of the mandrel, and the other end of the torsion bar is fixedly connected with the shaft head through the torsion head; the end face of the other end of the mandrel is a first end face, and a pushing assembly is arranged on the first end face; at least part of the torsion head protrudes out of the first end face, and the end face of the torsion head protruding out of the first end face is a second end face;
the plurality of force limiting rings are overlapped along the axial direction of the torque head and are positioned between the shaft head and the mandrel, one part of the force limiting rings is connected with the second end face, the other part of the force limiting rings is wound on the pushing component, and the pushing component can rotate along with the mandrel and push the other part of the force limiting rings to be wound on the torque head.
In any of the above solutions, optionally, the force limiting ring includes a fixing portion, a first pushing portion, a second pushing portion, a first extending portion, and a second extending portion; the first pushing part is connected between one end of the fixed part and the fixed end of the first extending part, the free end of the first extending part extends towards a preset direction relative to the fixed end of the first extending part, and a first space is defined by the fixed part, the first pushing part and the first extending part;
The second pushing part is connected between the other end of the fixed part and the fixed end of the second extending part, the free end of the second extending part extends towards a preset direction relative to the fixed end of the second extending part, and a second space is defined by the fixed part, the second pushing part and the second extending part; the preset direction is clockwise or anticlockwise;
the fixed part is connected with the second end face, the pushing assembly comprises a first pushing block and a second pushing block, the first pushing block is located in the first space, and the second pushing block is located in the second space.
In any of the above technical solutions, optionally, the second end surface is provided with a mounting groove, and the fixing portions of the force limiting rings are all adaptively disposed in the mounting groove;
The free ends of the first and second extensions each form a default bevel that faces outward of the force limiting ring.
In any of the above technical solutions, optionally, along the predetermined direction, a first stop block and a second stop block are sequentially disposed on the second end surface, a first idle space is formed between the first stop block and the second stop block, and a second idle space is formed between the second stop block and the first stop block;
A part of the fixing portion is disposed in the first idle space, and another part of the fixing portion is disposed in the second idle space.
In any of the above technical solutions, optionally, the fixing portion is in a straight line shape, and the first limiting block and the second limiting block are oppositely disposed.
In any of the above solutions, optionally, an end of the fixing portion, which is close to the first pushing portion, abuts against the second stopper, and an end of the fixing portion, which is close to the second pushing portion, abuts against the first stopper;
The first pushing block is abutted against the second pushing part, and the second pushing block is abutted against the first pushing part.
In any of the above technical solutions, optionally, along the predetermined direction, a first stop block and a second stop block are sequentially disposed on the second end surface, a first idle space is formed between the first stop block and the second stop block, and a second idle space is formed between the second stop block and the first stop block;
The plurality of force limiting rings are composed of a first force limiting ring group and a second force limiting ring group, and the first force limiting ring group and the second force limiting ring group at least comprise one force limiting ring respectively; a part of the fixing part of the first force limiting ring group is arranged in the first idle space, and the other part of the fixing part of the first force limiting ring group is arranged in the second idle space; the second end face is provided with a mounting groove, and the fixing parts of the second force limiting ring group are all arranged in the mounting groove in an adaptive manner;
The first pushing block is located between the first pushing part of the first force limiting ring set and the second pushing part of the second force limiting ring set, and the second pushing block is located between the second pushing part of the first force limiting ring set and the first pushing part of the first force limiting ring set.
In any of the above solutions, optionally, the retractor mandrel assembly further includes a stop nut, one end of the stop nut is fixedly connected with the other end of the mandrel; the periphery of the torsion head, which is far away from the second end surface, is provided with a stop part and an external thread with a preset stroke, and the stop nut is in threaded connection with the torsion head;
When the shaft head is fixed and the core rotates in the preset direction, the stop nut can be screwed in the direction close to the second end face until abutting against the stop part.
In any of the above technical solutions, optionally, an annular separator is disposed between each two adjacent force limiting rings, and the annular separator is sleeved on the periphery of the torque head; the annular partition plate is provided with a through hole, and the pushing assembly penetrates through the annular partition plate through the through hole.
Based on the second object, the invention provides a safety belt retractor comprising a retractor spindle assembly as described in any of the above claims.
By adopting the technical scheme, the invention has the beneficial effects that:
Compared with the technical scheme of using one force limiting ring, the invention can improve the friction resistance between the force limiting ring and the pushing component, and can prolong the total length of the force limiting ring and the rotating force limiting stroke of the force limiting ring on the mandrel, thereby greatly improving the force limiting capacity of the mandrel component of the retractor, in particular the secondary force limiting capacity of the mandrel component of the retractor. The safety belt retractor provided by the invention comprises the retractor mandrel assembly, so that all beneficial technical effects achieved by the retractor mandrel assembly can be achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is an exploded view of a retractor mandrel assembly according to one embodiment of the present invention;
FIG. 2 is a schematic structural view of a first implementation of a retractor mandrel assembly according to an embodiment of the present invention;
FIG. 3 is a schematic view of a portion of the retractor mandrel assembly of FIG. 2;
Fig. 4 is a schematic structural view of a second embodiment of a seatbelt retractor according to an embodiment of the present invention;
FIG. 5 is a schematic view of a portion of the retractor mandrel assembly of FIG. 4;
Fig. 6 is a schematic structural view of a third embodiment of a seatbelt retractor provided according to an embodiment of the present invention;
FIG. 7 is a schematic view of a portion of the retractor mandrel assembly of FIG. 6;
FIG. 8 is a schematic structural view of a torsion head of the retractor mandrel assembly of FIG. 6;
fig. 9 is a schematic structural view of a seatbelt retractor according to a second embodiment of the present invention.
Icon: 1-a retractor mandrel assembly; 10-a mandrel; 100-a first end face; 101-a first push block; 102-a second pusher block; 103-a first space; 104-a second space; 11-shaft heads; 12-torque head; 120-a second end face; 121-mounting slots; 122-a first limiting block; 123-a second limiting block; 124-a first idle space; 125-a second idle space; 126-cut-off; 127-external threads; 15-a force limiting ring; 150-fixing part; 151-a first pushing part; 152-a second pushing portion; 153-first extension; 154-a second extension; 16-stop nut; 17-annular separator; 2-seatbelt retractor.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1-8, the present embodiment provides a retractor mandrel assembly; fig. 1 is an exploded view of a retractor mandrel assembly provided in this embodiment, which simply illustrates the structure of the retractor mandrel assembly; FIG. 2 is a schematic view of a first embodiment of a retractor mandrel assembly provided in this example; FIG. 3 is a schematic view of a portion of the retractor mandrel assembly of FIG. 2, clearly illustrating the relative positional relationship between the plurality of force limiting rings and the torque head of FIG. 2; FIG. 4 is a schematic view of a second implementation of the retractor mandrel assembly provided in this example; FIG. 5 is a partial schematic view of the retractor mandrel assembly of FIG. 4, clearly illustrating the relative positional relationship between the plurality of force limiting rings and the torque head of FIG. 4; FIG. 6 is a schematic structural view of a third implementation of the retractor mandrel assembly provided in this embodiment; FIG. 7 is a partial schematic view of the retractor mandrel assembly of FIG. 6, clearly illustrating the relative positional relationship between the plurality of force limiting rings and the torque head of FIG. 6; fig. 8 is a schematic structural view of a torsion head of the retractor mandrel assembly of fig. 6.
The retractor mandrel assembly provided by the embodiment is used for a safety belt retractor.
Referring to fig. 1 to 8, the retractor mandrel assembly 1 comprises a mandrel 10, a mandrel head 11, a torsion bar, a torsion head 12 and a plurality of force limiting rings 15;
One end of the torsion bar is fixedly connected with one end of the mandrel 10, and the other end of the torsion bar is fixedly connected with the shaft head 11 through the torsion head 12. Under normal conditions, the mandrel 10, the spindle head 11, the torsion bar and the torsion head 12 can synchronously rotate, so that the rolling and unreeling of the safety belt are realized. When an emergency occurs, the shaft head 11 and the torsion head 12 are locked and fixed, and meanwhile, the mandrel 10 continues to rotate along with the pulling of the safety belt, and as one end of the torsion bar is fixedly connected with the mandrel 10 and the other end of the torsion bar is fixedly connected with the torsion head 12, the rotation speeds of the two ends of the torsion bar are different, so that the two ends of the torsion bar are twisted relatively, resistance is applied to the rotation of the mandrel 10 through the twisting of the torsion bar, and a first-stage limiting force is formed on the rotation of the mandrel 10 through the twisting of the torsion bar.
The end surface of the other end of the mandrel 10 is a first end surface 100, and a pushing component is arranged on the first end surface 100; at least part of the torsion head 12 protrudes from the first end face 100, and the end face of the torsion head 12 protruding from the first end face 100 is a second end face 120. That is, the second end surface 120 is said to protrude toward the stub shaft 11 relative to the first end surface 100.
A plurality of force limiting rings 15 are stacked along the axial direction of the torque head 12 and located between the spindle head 11 and the spindle 10, and a portion of the force limiting rings 15 is connected with the second end surface 120. Wherein optionally the force limiting rings 15 are stacked in alignment or in offset relation along the axial direction of the torque head 12.
Optionally, a portion of the force limiting ring 15 is clamped on the second end face 120, or a portion of the force limiting ring 15 is embedded on the second end face 120, or a portion of the force limiting ring 15 is welded on the second end face 120, or a portion of the force limiting ring 15 is threaded on the second end face 120, or a portion of the force limiting ring 15 can rotate along the circumferential direction of the torque head 12 within a predetermined range of the second end face 120.
Alternatively, the pushing component is a protrusion disposed on the first end surface 100, and the distance between the protrusions protruding from the first end surface 100 is not less than the stacking dimension of the force limiting rings 15 along the axial direction of the torsion head 12.
Another portion of the force limiting ring 15 is wound on a push assembly that is capable of rotating with the mandrel 10 and pushing another portion of the force limiting ring 15 to be wound on the torque head 12. Specifically, the other portion of the force limiting ring 15 extends from the side of the push assembly near the torque head 12 to the side of the push assembly remote from the torque head 12, and then the other portion of the force limiting ring 15 is bent in a direction opposite to the rotation direction of the mandrel 10 in the event of an emergency, so that the other portion of the force limiting ring 15 is wound around the push assembly.
Under normal conditions, the force limiting ring 15 can remain as it is due to the synchronous rotation of the torque head 12 and the spindle 10. In an emergency, since the torque head 12 is fixed, a part of the force limiting ring 15 is fixed, and since the mandrel 10 continues to rotate, the pushing assembly continues to rotate along with the mandrel 10, and another part of the force limiting ring 15 is deformed under the pushing action of the pushing assembly, so that another part of the force limiting ring 15 is gradually wound on the periphery of the torque head 12. When another part of the force limiting rings 15 is deformed, friction resistance is formed between the force limiting rings 15 and the pushing assembly, so that secondary force limiting on rotation of the mandrel 10 is formed through deformation of the force limiting rings 15.
In the retractor mandrel assembly 1 of the present embodiment, as the number of the force limiting rings 15 is multiple, compared with the technical scheme of using one force limiting ring 15, on one hand, the friction resistance between the force limiting ring 15 and the pushing assembly can be improved, on the other hand, the total length of the force limiting ring 15 is prolonged, and the force limiting stroke of the force limiting ring 15 for the rotation of the mandrel 10 can be prolonged, so that the force limiting capacity of the retractor mandrel assembly 1, in particular, the secondary force limiting capacity of the retractor mandrel assembly 1 is greatly improved.
In an alternative of the present embodiment, the force limiting ring 15 includes a fixing portion 150, a first pushing portion 151, a second pushing portion 152, a first extending portion 153, and a second extending portion 154.
The first pushing portion 151 is connected between one end of the fixing portion 150 and the fixed end of the first extending portion 153, the free end of the first extending portion 153 extends in a predetermined direction relative to the fixed end of the first extending portion 153, and the fixing portion 150, the first pushing portion 151 and the first extending portion 153 define a first space 103. Wherein the predetermined direction is clockwise or counterclockwise, which is opposite to the rotational direction of the spindle 10 in case of emergency.
The second pushing portion 152 is connected between the other end of the fixing portion 150 and the fixed end of the second extending portion 154, the free end of the second extending portion 154 extends toward a predetermined direction relative to the fixed end of the second extending portion 154, and the fixing portion 150, the second pushing portion 152 and the second extending portion 154 enclose the second space 104.
Specifically, when the first extension portion 153 extends in a predetermined direction to contact the second pushing portion 152, the first space 103 is surrounded by the fixing portion 150, the first pushing portion 151, and the first extension portion 153; when the first extension portion 153 does not extend to the second pushing portion 152 along the predetermined direction, the first space 103 is surrounded by the fixing portion 150, the first pushing portion 151, and an extension line of the first extension portion 153 along the predetermined direction. Similarly, the second space 104 is surrounded by the fixing portion 150, the second pushing portion 152 and the second extending portion 154, or the second space 104 is surrounded by the fixing portion 150, the second pushing portion 152 and the second extending portion 154 along an extension line of a predetermined direction.
The fixing portion 150 is connected to the second end face 120, and the pushing assembly includes a first pushing block 101 and a second pushing block 102, where the first pushing block 101 is located in the first space 103, and the second pushing block 102 is located in the second space 104.
Since the first pushing block 101 is located in the first space 103 and the second pushing block 102 is located in the second space 104, in an emergency, when the spindle 10 rotates in the opposite direction to the predetermined direction, the first pushing block 101 can move in the first space 103 to abut against the first pushing portion 151, the second pushing block 102 can move in the second space 104 to abut against the second pushing portion 152, and as the spindle 10 continues to rotate, the first extending portion 153 can be pulled out from the outside of the first pushing block 101, and the second extending portion 154 can be pulled out from the outside of the second pushing block 102, so that the first extending portion 153 and the second extending portion 154 are wound around the outer circumference of the torsion head 12, respectively.
Alternatively, under normal conditions, the first pushing block 101 abuts the first pushing portion 151 in the first space 103, and the second pushing block 102 abuts the second pushing block 102 in the second space 104. So that when an emergency occurs, as soon as the spindle 10 starts to rotate, the first push block 101 immediately pushes the first extension 153 to wrap around the outer circumference of the torsion head 12, and the second push block 102 pushes the second extension 154 to wrap around the outer circumference of the torsion head 12. Thereby facilitating the improvement of the efficiency of the secondary force-limiting activation of the plurality of force-limiting rings 15. Of course, the position of the first pushing block 101 in the first space 103 and the position of the second pushing block 102 in the second space 104 can be adjusted according to actual requirements, so as to limit the time when the force limiting rings 15 start the secondary force limiting.
In an alternative to this embodiment, the free ends of the first extension 153 and the second extension 154 each form a default bevel (not shown) that faces the outside of the force limiting ring 15.
When the force limiting ring 15 is drawn to the free end of the first extension portion 153 and the free end of the second extension portion 154, the distance between the force limiting ring 15 and the outer circumference of the torque head 12 becomes larger due to the default inclined surface, so that the compression degree of the default inclined surface on the first pushing block 101 and the second pushing block 102 becomes smaller and smaller, and the friction force between the free end of the first extension portion 153 and the first pushing block 101 and the friction force between the free end of the second extension portion 154 and the second pushing block 102 are reduced, so that the process of gradually vanishing the limiting force of each force limiting ring 15 on the mandrel 10 is smoother and smoother, and the impact is reduced.
It should be noted that the free end of the first extension portion 153 refers to an end of the first extension portion 153 that is not connected to the first pushing portion 151, and the free end of the second extension portion 154 refers to an end of the second extension portion 154 that is not connected to the second pushing portion 152.
Alternatively, the default slope corresponding to the first extension 153 gradually extends toward the inside of the force limiting ring 15 along the extension direction of the first extension 153; along the extending direction of the second extending portion 154, the default slope corresponding to the second extending portion 154 gradually extends toward the inside of the force limiting ring 15.
In an alternative of this embodiment, as shown in fig. 2 and 3, the second end surface 120 is provided with a mounting groove 121, and the fixing portions 150 of the plurality of force limiting rings 15 are all adaptively disposed in the mounting groove 121. This is a first embodiment of the retractor mandrel assembly 1, specifically, when the first pushing block 101 abuts against the first pushing portion 151 and the second pushing block 102 abuts against the second pushing portion 152, under the combined action of the mounting groove 121 and the first pushing block 101, the two ends of the first pushing portion 151 are not synchronous, so that as the mandrel 10 starts to rotate, the first pushing block 101 starts to push and directly wind the first extending portion 153 around the periphery of the torque head 12, and similarly, under the combined action of the mounting groove 121 and the second pushing portion 152, the two ends of the second pushing portion 152 are not synchronous, so that as the second pushing block 102 starts to push and directly wind the second extending portion 154 around the periphery of the torque head 12.
By arranging the fixing portions 150 of the force limiting rings 15 in the mounting groove 121, the first pushing portions 151 of the force limiting rings 15 are aligned with each other, and the second pushing portions 152 of the force limiting rings 15 are also aligned with each other, so that the first pushing blocks 101 can be simultaneously abutted against the first pushing portions 151 of the force limiting rings 15, and the second pushing blocks 102 can be simultaneously abutted against the second pushing portions 152 of the force limiting rings 15, thus the force limiting rings 15 can simultaneously start to rotate the mandrel 10 to limit force, and the friction resistance between the force limiting rings 15 and the pushing assembly can be greatly improved. In the second aspect, since the force limiting rings 15 are connected to the torque head 12 through the mounting grooves 121, the force limiting rings 15 and the torque head 12 can be easily assembled and disassembled. In the third aspect, since the fixing portion 150 is adapted to the mounting groove 121, the fixing portion 150 can be firmly embedded in the mounting groove 121 without rotation or play therein in case of emergency, thereby being beneficial to improving the reliability of the secondary force limitation of the plurality of force limitation rings 15.
This structure is suitable for the case where the torsion bar and the plurality of force limiting rings 15 need to simultaneously limit the rotation of the spindle 10, that is, the case where the primary force limiting and the secondary force limiting are simultaneously performed.
Alternatively, the first extension 153 of the plurality of force limiting rings 15 extends in the predetermined direction for the same length, such that the plurality of force limiting rings 15 all participate in a secondary force limiting for rotation of the spindle 10 from beginning to end. Or the first extending portions 153 of the force limiting rings 15 have different lengths along the predetermined direction, so that the force limiting ring 15 with a shorter extending length stops the secondary force limiting for the rotation of the mandrel 10 before the force limiting ring 15 with a longer extending length stops the secondary force limiting for the rotation of the mandrel 10, thereby making the force limiting rings 15 more hierarchical.
In an alternative of the present embodiment, as shown in fig. 4 and 5, a first stopper 122 and a second stopper 123 are sequentially disposed on the second end surface 120 along a predetermined direction, a first idle space 124 is formed between the first stopper 122 and the second stopper 123, and a second idle space 125 is formed between the second stopper 123 and the first stopper 122; a portion of the fixing portion 150 is disposed in the first idle space 124, and another portion of the fixing portion 150 is disposed in the second idle space 125.
This is the second embodiment of the retractor assembly, since the first pushing block 101 is located in the first space 103 and the second pushing block 102 is located in the second space 104, in an emergency, when the spindle 10 rotates in the opposite direction to the predetermined direction, first, the first pushing block 101 can move in the first space 103 to abut against the first pushing portion 151, and the second pushing block 102 can move in the second space 104 to abut against the second pushing portion 152. Then, as the spindle 10 continues to rotate, due to the pushing action of the first pushing block 101 and the second pushing block 102 on the fixing portion 150, a part of the fixing portion 150 rotates in the first idle space 124 to abut against the first stopper 122, while another part of the fixing portion 150 rotates in the second idle space 125 to abut against the second stopper 123. Finally, the mandrel 10 is further rotated, the first extension portion 153 is drawn out and wound around the outer circumference of the torsion head 12 under the combined action of the first pushing block 101 and the first limiting block 122, and the second extension portion 154 is drawn out and wound around the outer circumference of the torsion head 12 under the combined action of the second pushing block 102 and the second limiting block 123, so that the second-stage force limiting is started.
When the fixing portion 150 rotates in the first idle space 124 and the second idle space 125, the plurality of force limiting rings 15 cannot limit the rotation of the spindle 10, and thus limit the rotation of the spindle 10 only by torsion of the torsion bar; when the fixing portion 150 abuts against the first limiting block 122 and the second limiting block 123, the torsion bar and the force limiting rings 15 simultaneously limit the rotation of the mandrel 10. Thereby realizing the function of limiting force through the torsion bar and then limiting force through the torsion bar and the plurality of force limiting rings 15 together.
In normal circumstances, the first pushing portions 151 of the force limiting rings 15 do not need to be aligned with each other, and the first pushing blocks 101 are pushed by the first pushing blocks 122 to abut against the first limiting blocks 122 at the same time. Similarly, the second pushing portions 152 of the plurality of force limiting rings 15 need not be aligned with each other.
Alternatively, the cross-sectional shapes of the first stopper 122 and the second stopper 123 along the radial direction of the torque head 12 are fan-shaped, and a gap is formed between the fan-shaped center positions of the first stopper 122 and the second stopper 123 to communicate the first idle space 124 and the second idle space 125 through the gap, so that the plurality of force limiting rings 15 can move in the first idle space 124 and the second idle space 125 at the same time.
In an alternative of this embodiment, the fixing portion 150 is linear, and the first limiting block 122 and the second limiting block 123 are disposed opposite to each other.
Alternatively, the fixing portion 150 includes a first fixing portion 150 and a second fixing portion 150 connected in a zigzag shape, the first fixing portion 150 is disposed in the first idle space 124, the second fixing portion 150 is disposed in the second idle space 125, and an included angle between the first limiting block 122 and the second limiting block 123 is the same as an included angle between the first fixing portion 150 and the second fixing portion 150.
In an alternative of this embodiment, an end of the fixing portion 150 near the first pushing portion 151 abuts against the second limiting block 123, and an end of the fixing portion 150 near the second pushing portion 152 abuts against the first limiting block 122. Specifically, the fixing portion 150 abuts the second stopper 123 in the first idle space 124, and the fixing portion 150 abuts the first stopper 122 in the second idle space 125. The first pushing block 101 abuts against the second pushing portion 152, and the second pushing block 102 abuts against the first pushing portion 151, specifically, the first pushing block 101 abuts against the second pushing portion 152 in the first space 103, and the second pushing block 102 abuts against the first pushing portion 151 in the second space 104.
It is worth emphasizing that the positions of the fixing portion 150, the first pushing block 101 and the second pushing block 102 provided in this technical solution are positions under normal conditions. Since it is necessary to start the secondary force limitation of the rotation of the plurality of force limitation rings 15 with respect to the spindle 10 after the first pushing block 101 moves in the entire first space 103 and the fixing portion 150 moves in the entire first idle space 124, the utilization rate of the first space 103, the second space 104, the first idle space 124 and the second idle space 125 can be improved.
In an alternative of the present embodiment, as shown in fig. 6 to 8, a first stopper 122 and a second stopper 123 are sequentially disposed on the second end surface 120 along a predetermined direction, a first idle space 124 is formed between the first stopper 122 and the second stopper 123, and a second idle space 125 is formed between the second stopper 123 and the first stopper 122.
The plurality of force limiting rings 15 are composed of a first force limiting ring group and a second force limiting ring group, and the first force limiting ring group and the second force limiting ring group respectively comprise at least one force limiting ring 15; a portion of the fixing portion 150 of the first force limiting ring set is disposed in the first idle space 124, and another portion of the fixing portion 150 of the first force limiting ring set is disposed in the second idle space 125; the second end surface 120 is provided with a mounting groove 121, and the fixing parts 150 of the second force limiting ring set are all arranged in the mounting groove 121 in a matching manner.
Normally, the first pushing block 101 is located between the first pushing portion 151 of the first force limiting ring set and the second pushing portion 152 of the second force limiting ring set, and the second pushing block 102 is located between the second pushing portion 152 of the first force limiting ring set and the first pushing portion 151 of the first force limiting ring set.
This solution is a third embodiment of the retractor mandrel assembly 1. In an emergency, as the mandrel 10 rotates, the first pushing block 101 moves to abut against the first pushing portion 151 of the first force limiting ring set, so as to push the first extending portion 153 of the first force limiting ring set to be drawn out from the outer side of the first pushing block 101, until the first pushing block 101 moves in the first space 103 to abut against the first pushing portion 151 of the second force limiting ring set, it is possible to start pushing the first extending portion 153 of the second force limiting ring set to be drawn out from the outer side of the first pushing block 101. Meanwhile, the second pushing block 102 moves to abut against the second pushing portion 152 of the first force limiting ring set first, and then moves to abut against the second pushing portion 152 of the second force limiting ring set, so that the second extending portion 154 of the first force limiting ring set can be extracted first, and then the second extending portion 154 of the second force limiting ring set can be extracted.
By the structure, one part of the plurality of force limiting rings 15 can be pulled out firstly, and the other part of the plurality of force limiting rings 15 can be pulled out later, so that the force limiting stroke of the plurality of force limiting rings 15 for the rotation of the mandrel 10 can be effectively prolonged.
Alternatively, when the number of force limiting rings 15 is two, the fixing portion 150 of one force limiting ring 15 is disposed in the mounting groove 121, a portion of the fixing portion 150 of the other force limiting ring 15 is disposed in the first idle space 124, and another portion of the fixing portion 150 of the other force limiting ring 15 is disposed in the second idle space 125. I.e. the first force limiting ring set and the second force limiting ring set each comprise one force limiting ring 15.
In an alternative to this embodiment, the retractor mandrel assembly 1 further comprises a stop nut 16, one end of the stop nut 16 being fixedly connected to the other end of the mandrel 10. The outer periphery of the torque head 12, which is far from the second end surface 120, is provided with a stop portion 126 and an external thread 127 of a predetermined stroke, and the stop nut 16 is screwed with the torque head 12. The torque head 12 is connected to the torque head 12 through a stop nut 16.
When the stub shaft 11 is stationary and the spindle 10 is rotated in a predetermined direction, the stop nut 16 can be threaded in a direction toward the second end face 120 until it abuts the stop 126.
Specifically, when an emergency occurs, the head 11 and the head 12 are fixed, and the spindle 10 and the stop nut 16 continue to rotate, thereby rotating the torsion bar while the stop nut 16 is screwed in a direction approaching the second end face 120. When the mandrel 10 rotates until the first pushing block 101 abuts against the first pushing portions 151 of the plurality of force limiting rings 15, or the second pushing block 102 abuts against the second pushing portions 152 of the plurality of force limiting rings 15, the first extending portions 153 and the second extending portions 154 start to be extracted, so that the second-stage force limiting of the force limiting rings 15 to the mandrel 10 starts. Until the stop nut 16 abuts against the stop portion 126, the spindle 10 is forced to stop rotating, the torsion bar stops continuing to twist, and the force limiting ring 15 stops continuing to extract, i.e. the secondary force limiting process stops.
Optionally, at least one protrusion is provided on the outer circumference of the stop nut 16, and a groove is provided on the spindle 10, which is adapted to the outer circumference of the stop nut 16, so that the stop nut 16 can be fixedly connected with the spindle 10.
In the alternative scheme of the embodiment, an annular partition plate 17 is arranged between every two adjacent force limiting rings 15, and the annular partition plate 17 is sleeved on the periphery of the torque head 12; the annular partition 17 is provided with a through hole, and the pushing assembly passes through the annular partition 17 through the through hole. By arranging the annular partition plate 17 between every two adjacent force limiting rings 15, on one hand, the friction resistance of the force limiting rings 15 in the secondary force limiting process of the rotation of the mandrel 10 can be improved, and on the other hand, the space interference of the adjacent force limiting rings 15 in the process of winding the torsion head 12 can be avoided, so that the smoothness of the secondary force limiting process is improved.
Optionally, the number of the force limiting rings 15 is two, and an annular partition 17 is arranged between the two force limiting rings 15.
Example two
A second embodiment provides a seatbelt retractor, which includes the retractor mandrel assembly of the first embodiment, and technical features of the retractor mandrel assembly disclosed in the first embodiment are also applicable to the embodiment, and technical features of the retractor mandrel assembly disclosed in the first embodiment are not repeated.
Referring to fig. 9 in combination with fig. 1 to 8, a seatbelt retractor 2 provided in this embodiment includes a retractor spindle assembly 1 provided in the first embodiment.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention. Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, any of the claimed embodiments can be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (10)
1. The retractor mandrel assembly is characterized by comprising a mandrel, a shaft head, a torsion bar, a torsion head and a plurality of force limiting rings;
One end of the torsion bar is fixedly connected with one end of the mandrel, and the other end of the torsion bar is fixedly connected with the shaft head through the torsion head; the end face of the other end of the mandrel is a first end face, and a pushing assembly is arranged on the first end face; at least part of the torsion head protrudes out of the first end face, and the end face of the torsion head protruding out of the first end face is a second end face;
the plurality of force limiting rings are overlapped along the axial direction of the torque head and are positioned between the shaft head and the mandrel, one part of the force limiting rings is connected with the second end face, the other part of the force limiting rings is wound on the pushing component, and the pushing component can rotate along with the mandrel and push the other part of the force limiting rings to be wound on the torque head.
2. The retractor mandrel assembly of claim 1, wherein said force limiting ring comprises a fixed portion, a first pushing portion, a second pushing portion, a first extension portion, and a second extension portion; the first pushing part is connected between one end of the fixed part and the fixed end of the first extending part, the free end of the first extending part extends towards a preset direction relative to the fixed end of the first extending part, and a first space is defined by the fixed part, the first pushing part and the first extending part;
the second pushing part is connected between the other end of the fixed part and the fixed end of the second extending part, the free end of the second extending part extends towards a preset direction relative to the fixed end of the second extending part, and a second space is defined by the fixed part, the second pushing part and the second extending part; the preset direction is clockwise or anticlockwise;
the fixed part is connected with the second end face, the pushing assembly comprises a first pushing block and a second pushing block, the first pushing block is located in the first space, and the second pushing block is located in the second space.
3. The retractor mandrel assembly of claim 2, wherein said second end face is provided with a mounting groove, and wherein a plurality of said force limiting ring securing portions are each adapted to be disposed within said mounting groove;
The free ends of the first and second extensions each form a default bevel that faces outward of the force limiting ring.
4. The retractor mandrel assembly of claim 2, wherein,
A first limiting block and a second limiting block are sequentially arranged on the second end face along the preset direction, a first idle space is formed between the first limiting block and the second limiting block, and a second idle space is formed between the second limiting block and the first limiting block;
A part of the fixing portion is disposed in the first idle space, and another part of the fixing portion is disposed in the second idle space.
5. The retractor mandrel assembly of claim 4, wherein,
The fixed part is in a straight line shape, and the first limiting block and the second limiting block are oppositely arranged.
6. The retractor mandrel assembly of claim 4, wherein,
One end of the fixed part, which is close to the first pushing part, is abutted against the second limiting block, and one end of the fixed part, which is close to the second pushing part, is abutted against the first limiting block;
The first pushing block is abutted against the second pushing part, and the second pushing block is abutted against the first pushing part.
7. The retractor mandrel assembly of claim 2, wherein,
A first limiting block and a second limiting block are sequentially arranged on the second end face along the preset direction, a first idle space is formed between the first limiting block and the second limiting block, and a second idle space is formed between the second limiting block and the first limiting block;
The plurality of force limiting rings are composed of a first force limiting ring group and a second force limiting ring group, and the first force limiting ring group and the second force limiting ring group at least comprise one force limiting ring respectively; a part of the fixing part of the first force limiting ring group is arranged in the first idle space, and the other part of the fixing part of the first force limiting ring group is arranged in the second idle space; the second end face is provided with a mounting groove, and the fixing parts of the second force limiting ring group are all arranged in the mounting groove in an adaptive manner;
The first pushing block is located between the first pushing part of the first force limiting ring set and the second pushing part of the second force limiting ring set, and the second pushing block is located between the second pushing part of the first force limiting ring set and the first pushing part of the first force limiting ring set.
8. The retractor mandrel assembly of claim 7, further comprising a stop nut, one end of said stop nut being fixedly connected to the other end of said mandrel; the periphery of the torsion head, which is far away from the second end surface, is provided with a stop part and an external thread with a preset stroke, and the stop nut is in threaded connection with the torsion head;
When the shaft head is fixed and the core rotates in the preset direction, the stop nut can be screwed in the direction close to the second end face until abutting against the stop part.
9. The retractor mandrel assembly of claim 2, wherein,
An annular partition plate is arranged between every two adjacent force limiting rings, and the annular partition plate is sleeved on the periphery of the torque head; the annular partition plate is provided with a through hole, and the pushing assembly penetrates through the annular partition plate through the through hole.
10. A seatbelt retractor comprising a retractor spindle assembly according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910982290.7A CN110562193B (en) | 2019-10-16 | 2019-10-16 | Retractor mandrel assembly and seatbelt retractor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910982290.7A CN110562193B (en) | 2019-10-16 | 2019-10-16 | Retractor mandrel assembly and seatbelt retractor |
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| CN110562193A CN110562193A (en) | 2019-12-13 |
| CN110562193B true CN110562193B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910982290.7A Active CN110562193B (en) | 2019-10-16 | 2019-10-16 | Retractor mandrel assembly and seatbelt retractor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014211979B3 (en) * | 2014-06-23 | 2015-08-20 | Autoliv Development Ab | Belt retractor with a force limiting device |
| CN207510366U (en) * | 2017-12-08 | 2018-06-19 | 沈阳金杯锦恒汽车安全系统有限公司 | A kind of limiter ring |
| CN109278699A (en) * | 2018-12-04 | 2019-01-29 | 沈阳金杯锦恒汽车安全系统有限公司 | A kind of coiler mandrel component and seat belt retractor |
| CN210760664U (en) * | 2019-10-16 | 2020-06-16 | 沈阳金杯锦恒汽车安全系统有限公司 | Retractor spindle assembly and safety belt retractor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011087413A1 (en) * | 2011-11-30 | 2013-06-06 | Autoliv Development Ab | Belt retractor with two parallel force limiting devices |
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2019
- 2019-10-16 CN CN201910982290.7A patent/CN110562193B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014211979B3 (en) * | 2014-06-23 | 2015-08-20 | Autoliv Development Ab | Belt retractor with a force limiting device |
| CN207510366U (en) * | 2017-12-08 | 2018-06-19 | 沈阳金杯锦恒汽车安全系统有限公司 | A kind of limiter ring |
| CN109278699A (en) * | 2018-12-04 | 2019-01-29 | 沈阳金杯锦恒汽车安全系统有限公司 | A kind of coiler mandrel component and seat belt retractor |
| CN210760664U (en) * | 2019-10-16 | 2020-06-16 | 沈阳金杯锦恒汽车安全系统有限公司 | Retractor spindle assembly and safety belt retractor |
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| CN110562193A (en) | 2019-12-13 |
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