CN108238001A - For the torque arm of seat belt retractor, seat belt retractor and safety belt assembly - Google Patents
For the torque arm of seat belt retractor, seat belt retractor and safety belt assembly Download PDFInfo
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- CN108238001A CN108238001A CN201710231648.3A CN201710231648A CN108238001A CN 108238001 A CN108238001 A CN 108238001A CN 201710231648 A CN201710231648 A CN 201710231648A CN 108238001 A CN108238001 A CN 108238001A
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- torque arm
- seat belt
- belt retractor
- external tooth
- torque
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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
- B60R22/44—Belt retractors, e.g. reels with means for reducing belt tension during use under normal conditions
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
The present invention provides a kind of torque arm for seat belt retractor, the torque arm is in rod-shaped, its both ends and middle part are both provided with circumferential external tooth, at least one section in two sections of rod segments of the circumferential external tooth both sides in the middle part of the torque arm is provided with fracture induction slot, and the fracture induction slot on two sections of torque arms is both provided with scheduled effective depth and effective width, during so that the torque arm being rotated with the mandrel, one section in two sections of torsion rod segments is first broken.The torque arm of the present invention takes achievable two level to successively decrease limit type torque arm, applied to installation and successively decreases limiter, and the torque arm versatility is good, and only fracture induction slot, which can be processed, can be suitable for different vehicles.A kind of safety belt assembly the present invention also provides seat belt retractor using the torque arm and using above-mentioned seat belt retractor.
Description
This application claims being submitted on December 26th, 2016, Patent Office of the People's Republic of China, application No. is 201611217783.4, inventions
The Chinese patent application of entitled torque arm, seat belt retractor and the safety belt assembly of seat belt retractor " be used for " it is preferential
Power, entire contents are hereby incorporated by reference in the application.
Technical field
The present invention relates to safety belt technical fields, and in particular to a kind of torque arm for seat belt retractor.The present invention
It is related to a kind of seat belt retractor using the torque arm simultaneously and uses the safety belt of above-mentioned seat belt retractor total
Into.
Background technology
Safety belt is the basic safety device of automobile, when vehicle collides, it can to avoid or mitigate use
Person with interior article occurs secondary collision or is directly spilled over outside vehicle etc. dangerous.
Traditional safety belt is lock in emergency safety belt, lockable mechanism is configured on its coiler, when automobile touches
When hitting, which can stop the rotation of spool immediately, and ribbon is made no longer to stretch outward, so as to which occupant is fixed on automotive seats
On chair.But due to occupant's inertia, the power that collision moment ribbon is applied to occupant increased dramatically, and thus may lead to safety
Band damages occupant.
In order to alleviate impact of the safety belt to occupant when automobile collides, people have invented limit type safety belt, are sending out
Moment during raw collision, when the dynamics being applied on safety belt reaches a certain level, limit type safety belt releasable portion is knitted
Band extenuates impact of the ribbon to passenger's chest, so as to farthest protect occupant safety.In order to further reduce safety belt
Ribbon acts on the power of occupant's chest, and occupant is made to obtain better protecting effect, has invented the safety belt of multistage limiter of successively decreasing.
The two section torque arms different using length of existing two-stage limit type safety belt axially dock form two
Segmentation torque arm realizes two-stage limiter, simple in structure, but also has certain defect.The limiter characteristic of the torque arm by
Length with two sections of torque arms obtains, when new limiter characteristic is needed, if keeping torque arm overall length constant, and nothing
Coiler is needed to change, two sections of torque arms will be replaced at this time；If changing torque arm overall length, coiler is needed replacing, it is such
In the case of also need at least to replace wherein one section of torque arm, therefore the poor universality of the torque arm, for the different vehicle of limiter characteristic
Type needs to replace coiler and/or one section or two sections of torque arms simultaneously, thus the coiler of same size and torque arm repeat profit
It is extremely low with rate, it needs repeatedly to design and process coiler and the torque arm of different size to meet different limiter requirements, causes
The research and development of safety belt and manufacture cost increase.
Invention content
For solution more than technical problem, the present invention provides a kind of torque arm for safety belt.The present invention additionally provides make
With the coiler of the torque arm and safety belt assembly.
The present invention provides a kind of torque arm for seat belt retractor, and the seat belt retractor includes retractor frame
With spool and torque arm；The belt retractor frame includes two opposite side walls, in the corresponding position in the two side
It is respectively arranged with the round hole with internal tooth；The spool includes the through-hole set along central axes and the mandrel for winding ribbon,
And separably it is respectively arranged at two end caps at mandrel both ends；The center of the end cap is provided with the center with internal tooth
Shrinkage pool or through-hole, for fixing the two of the torque arm ends, and the end cap is circumferentially provided with and the coiler
The matched external tooth of internal tooth on frame, for spool described in locking；The middle section position of the through-hole of the mandrel axis line position
It is provided with internal tooth；The torque arm is in rod-shaped, and across the through-hole of the mandrel, both ends and middle part are both provided with circumferential direction
External tooth, and the circumferential external tooth at the torque arm both ends central fovea with described two end caps on the coiler respectively
The internal tooth of hole or through-hole matches, the stage casing of the circumferential external tooth in the middle part of the torque arm and the through-hole of the mandrel position of center line
The internal tooth of position matches, which is characterized in that in two sections of rod segments of the circumferential external tooth both sides in the middle part of the torque arm at least
One section is provided with fracture induction slot, and the fracture induction slot on two sections of torque arms is both provided with scheduled effective depth
And effective width so that when the torque arm is reversed with the mandrel, one section in two sections of torsion rod segments is first broken.
Preferably, the fracture induction slot is the annular groove along the circumferencial direction of the torque arm.
Preferably, the fracture induction slot and the torque arm are coaxial.
Preferably, the fracture induction slot is annular groove.
Preferably, the fracture induction slot of the circular ring shape is provided with scheduled groove depth and groove width.
Preferably, the number of the fracture induction slot is one.
Preferably, avoidance hypodontia is both provided on the circumferential external tooth at the middle part of the torque arm, and avoids what tooth lacked
Position corresponds to the fixing groove that ribbon end is passed through and fixed on mandrel.
Preferably, the torque arm is docked in an axial direction by two sections of torque arms, and the both ends of every section of torque arm are both provided with
Circumferential external tooth, the circumferential external tooth tooth form of two sections of torque arms docking end align and pass through and consolidate on corresponding to mandrel
The position for determining the fixing groove of ribbon end is provided with avoidance hypodontia；The common structure of circumferential external tooth of two sections of torque arms docking end
Circumferential external tooth in the middle part of into the torque arm；The common structure of avoidance hypodontia on the circumferential external tooth of two sections of torque arms docking end
The avoidance hypodontia on circumferential external tooth in the middle part of into the torque arm.
Preferably, the diameter of two sections of torque arms, material, at least one of difference of effective length.
In addition, the present invention also provides a kind of seat belt retractors of the torque arm provided using above-mentioned technical proposal.
Meanwhile the present invention also provides a kind of safety belt assemblies using seat belt retractor described above.
Compared with prior art, the present invention has the following advantages:
Provided by the present invention for the torque arm of seat belt retractor, two sections of rod segments of circumferential external tooth both sides in the middle
In at least one section on be provided with fracture induction slot, it is only necessary to adjust it is existing fracture induction slot effective width or/and effectively
Depth or the fracture induction slot increased newly can just obtain new limiter characteristic, for the different vehicle of limiter characteristic, only need
Processing is designed to the induction slot of torque arm, without replacing coiler, without diameter, the length for changing two sections of torque arms
Or material can meet demand.Therefore the coiler of same size and the versatility of torque arm are also substantially increased, so as to
Reduce the research and development of safety belt and manufacture cost.
Description of the drawings
Fig. 1 is the sectional view of spool axial direction of the present invention
Fig. 2 is one section of torque arm schematic diagram for being provided with fracture induction slot in two-part torque arm of the present invention.
Fig. 3 is the structure diagram of the embodiment of the coiler for safety belt of the present invention
Fig. 4 is the two sections of torsion rod segments included in the first embodiment of the present invention by different-diameter and different effective lengths
It is composed, and wherein one section has the sectional view of the spool axial direction of torque arm that fracture induces slot
Fig. 5 is the sectional view using the spool axial direction of the torque arm in the second embodiment of the present invention
Fig. 6 is the axial sectional view of the torque arm in third embodiment of the invention
Fig. 7 is the performance diagram of the seat belt retractor of two-stage degression type limiter characteristic
Specific embodiment
Many details are elaborated in the following description in order to fully understand the present invention.But the present invention can be with
Much implement different from other manner described here, those skilled in the art can be in the situation without prejudice to intension of the present invention
Under do similar popularization, therefore the present invention is not limited to the specific embodiments disclosed below.
First embodiment
In the present embodiment, torque arm is rod-shaped, and the torque arm is by two sections of torque arms and docks in an axial direction, wherein one
Section torque arm is peripherally disposed, and there are one the circular ring shape fracture induction slots coaxial with torque arm.It please refers to Fig.1, which is to make
With the structure diagram of the spool of the torque arm in the present embodiment, wherein torque arm 1 is the torque arm, as shown in Figure 1,
The torque arm 1 is formed by torque arm 1a and torque arm 1b both ends torque arm circumferential abutment, its circumference of the torque arm 1a upper edges
There are one the fracture induction slot 1a-1 of the annulus shape coaxial with torque arm, the depth of fracture induction slot is D, wide for direction setting
It spends for L.Referring to Fig. 2, which is the structure diagram of the torque arm 1a for being provided with the fracture induction slot 1a-1, two
End, which is both provided with to be provided on circumferential external tooth 1a-2 and 1a-3 and circumferential external tooth 1a-3, avoids hypodontia 1a-3-1, the position of the hypodontia
Put the fixing groove that belt-strap end is passed through and fixed on corresponding mandrel；Two ends of another section of torque arm 1b (not shown)
Also circumferential external tooth 1b-2 and 1b-3 is both provided with, and is provided on circumferential external tooth 1b-3 and avoids hypodontia 1b-3-1 (not shown), it should
The position of hypodontia also corresponds to the fixing groove that belt-strap end is passed through and fixed on mandrel.The tooth form of the circumferential direction external tooth 1a-3
And the tooth form and the avoidance hypodontia 1b-3-1 thereon of the avoidance hypodontia 1a-3-1 thereon and circumferential external tooth 1b-3
(not shown) aligns respectively.Referring to Fig. 1, when the torque arm 1a and 1b is docking together to form torque arm 1, the week is outward
The end face of the end where end and the circumferential external tooth 1b-3 where tooth 1a-3 abuts against, and the circumferential external tooth 1a-3
Teeth and the teeth for avoiding hypodontia 1a-3-1 and the circumferential external tooth 1b-3 and the avoidance hypodontia 1b-3-1 are opposite respectively
Together, circumferential direction the external tooth 1a-3 and 1b-3 collectively form the middle part circumferential direction external tooth 1-1, the hypodontia 1a-3-1 of the torque arm 1
It is collectively formed with 1b-3-1 and is passed through on position and mandrel on the middle part circumferential direction external tooth 1-1 and fix belt-strap end
Fixing groove is corresponding to avoid hypodontia 1-1-1 (not shown).The circumferential external tooth 1a-2 and 1b-2 of two ends of the torque arm 1
It is matched with the central pit hole of two end caps on coiler or the internal tooth of through-hole, the middle part circumferential direction external tooth 1-1 of the torque arm 1
It is matched with the internal tooth of the through-hole of the mandrel.
To be better understood from the torque arm of the present embodiment, with reference to the seat belt retractor using the torque arm to this hair
Bright torque arm is described in detail.It should be noted that in the present embodiment, other parts masters of seat belt retractor are described
If in order to be better understood from the torque arm of the present embodiment, and the description should not be formed to the application claims
Limitation.
Referring to Fig. 3, for a kind of structure diagram for seat belt retractor of the present invention, seat belt retractor includes
The torque arm 1, retractor frame 2 and spool 3.The retractor frame 2 includes two opposite side walls：The first side wall 2-1 and
Second sidewall 2-2 is respectively arranged with first through hole 2-1a in the first side wall 2-1 and the corresponding positions of second sidewall 2-2
(not shown) and the second through-hole 2-2a, the first through hole 2-1a (not shown) and the second through-hole 2-2a are circle, and exist
Identical position is provided with internal tooth section 2-3, and the internal tooth section is used to matched with the external tooth on the spool 3 by the spool 3
Locking.
Other structures are additionally provided on the seat belt retractor, which is not described herein again.
Referring to Fig. 1, the spool 3 includes mandrel 3-1 and separately positioned in two of the both ends of mandrel 3-1 ends
Lid：Left side end cap 3-2a and right side end cap 3-2b.
The mandrel 3-1 is used to wind belt-strap, and the mandrel 3-1 is provided with through-hole 3-3, institute along its central axes
It states and is provided with internal tooth on through-hole 3-3 inner walls.
The fixing groove 3-4 of prolate shape is additionally provided on the mandrel mandrel 3-1, for across and fixed belt-strap end
Portion.
Referring to Fig. 3, two outwardly directed force limit pin 3- are also respectively provided on two end faces of the mandrel mandrel 3-1
5。
The lightening grooves 3-6 for loss of weight is additionally provided on the mandrel 3-1.
As shown in Figure 1, the end cap 3-2a and 3-2b is provided in its inner face center towards the mandrel 3-1
Central pit hole with internal tooth, the central pit hole 3- on central pit hole 3-2a-1 and right side end cap 3-2b on the end cap 3-2a of left side
2b-1.In the present embodiment, the shrinkage pool of two end cap is set on the boss for stretching out its place end surface side.Corresponding end face of mandrel is then set
Put the seam allowance for accommodating the boss.
The end cap 3-2a and 3-2b is both provided with external tooth, as shown in Figure 1, the external tooth 3-2a-2 on the end cap 3-2a of left side and
External tooth 3-2b-2 on the end cap 3-2b of right side, and the internal tooth section on their equal and described retractor frame side wall 2-1 and 2-2
2-3 is matched.During safety belt locking, the external tooth 3-2a-2 and 3-2b-2 is meshed with the internal tooth section 2-3.
The end cap 3-2a and 3-2b in the end surface side towards the mandrel 3-1 with two end faces of the mandrel 3-1
The corresponding positions of force limit pin 3-5 be respectively arranged with pin hole, as shown in figure 3, the pin hole 3-2b-2 of right side end cap 3-2b,
When two end cap mode as shown in Figure 1 is set to the mandrel 3-1 both ends surface side, force limit pin is inserted into corresponding pin hole.Institute
Stating force limit pin 3-5 can be different in the installation position at mandrel both ends, can be used for positioning when end cap is assembled with mandrel 3-1 whereby,
Prevent left and right end cap loading error.Prior aspect is that force limit pin 3-5 can also bear shearing force during mandrel rotation,
And it is cut off when the shearing force reaches a threshold value.
In the outboard end surface side far from the mandrel 3-1 of the two end cap, along being provided centrally with to overhanging for the end face
The projecting shaft gone out.Right side projecting shaft 3-2b-3 and left side projecting shaft 3-2a-3 as shown in Figure 1.Wherein, left side projecting shaft 2-
2a-3 is connected with sensing element, and the setting of right side projecting shaft 2-2b-3 peripheries is with teeth, is connected with wind spring.
The torque arm 1 passes through the through-hole 3-3 and on the inner wall of the middle part circumferential direction external tooth 1-1 and through-hole 3-3
The internal tooth is meshed, the avoidance hypodontia 1-1-1 on the middle part circumferential direction external tooth 1-1 of the torque arm 1 and the core
The fixing groove 3-4 on axis 3-1 is aligned.The left side end cap 3-2a and right side end cap 2-2b is covered respectively from the left and right sides
In the both ends of the mandrel 3-1, and the force limit pin of corresponding position is corresponding with pin hole.Two ends part of the torque arm 1
Be not inserted into the central pit hole of left and right the end cap 3-2a and 3-2b, and circumferential the external tooth 1a-2 and 1b-2 respectively with it is described in
The heart shrinkage pool 3-2a-1 and 3-2b-1 are meshed.
The spool 3 is wholy set among the retractor frame 2, and the two end cap on spool 3 is respectively arranged at volume
Among the lateral through aperture for receiving device frame 2.During free state, the 3 rotatable floating of spool be set to the retractor frame 2 it
In, the external tooth on end cap is not contacted with the internal tooth section on retractor frame 2, and spool 3 can be freely rotated, and realize twining for ribbon
Around and release.And in lockup state, the external tooth of 3 two end cap of spool is meshed with the internal tooth on the retractor frame,
Spool 3 can not rotate.
In the present embodiment, central pit hole is provided on the end cap 3-2a and 3-2b, for the length of the torque arm 1
No more than the seat belt retractor axial length when, two ends of the fixed torque arm 1.In other real-time mode,
The length of the torque arm 1 can also be more than the axial length of the seat belt retractor, at this time accordingly in the end cap 3-
The center of 2a and 3-2b opens up central through hole, for fixing two ends of the torque arm 1.
In the present embodiment, the torque arm 1 is set as discrete two sections of torque arms 1a and 1b, and on the torque arm 1a
It is provided with fracture induction slot.Different fractures induction slot or different-diameter or unlike material or different effective lengths in such cases
Both ends the torque arm 1a and 1b be applied in combination or by above-mentioned several or whole different both ends torque arm 1a
It is applied in combination with 1b, different limiter values can be formed.
It is equipped in belt reel as shown in Figure 4 a kind of by different-diameter and two sections of torque arms of different effective lengths
Section be composed torque arm 1, due to the torque arm 1a it is peripherally disposed there are one with the coaxial width of torque arm for L,
The torsional fracture rod segment of circular ring shape fracture induction slot 1a-1, the torque arm 1a that depth is D are that fracture induction slot is corresponding
Length is L compared with thin bar section, the bar diameter of the bar diameter less than the torque arm 1b of this section, so the breakaway torque of the torque arm 1a is small
In the breakaway torque of the torque arm 1b, when seat belt retractor mandrel rotates, the torsional fracture rod segment of the torque arm 1a
It will be broken first after its width is reversed as the corresponding windup-degrees of L, lead to the torque arm 1 fracture failure first, realized
First order limiter；Mandrel is rotated further, and since the torque arm 1a has been broken, torque arm 1b can only be relied on to undertake the pressure of ribbon
Power so that the limiter value of shown torque arm 1 is substantially reduced, i.e., is worth smaller second level limiter into limiter.That is this reality
It applies in example, slot 1a-1 is induced by the fracture that is arranged on the torque arm 1a, realize that two-stage is successively decreased limiter, so as to form such as
Limiter characteristic curve described in Fig. 7.
Second embodiment
In the present embodiment, torque arm is monoblock type, please refers to Fig. 5, is the knot of the second embodiment of torque arm of the present invention
Structure schematic diagram.As described in Figure 4, the torque arm is monoblock type, and circumferential external tooth is also both provided at its both ends and middle part, is such as schemed
Shown in 4, both ends external tooth 1-2,1-3, middle part external tooth 1-1.The middle part external tooth 1-1 by the torque arm 1 be divided to for positioned at its two
Two sections of torsion rod segments of side：Left side rod segment 1-a and right side rod segment 1-b, there are one circumferentially for setting on the torsion rod segment 1-a
The direction circular ring shape fracture induction slot coaxial with torque arm, depth D, width L.The structure of the torque arm of the present embodiment
Other aspects and with form seat belt retractor assembling matching relationship it is identical with above-mentioned first embodiment, and have with
The identical technique effect of the torque arm of above-mentioned first embodiment, which is not described herein again.
3rd embodiment
The torque arm of first embodiment and second embodiment only in its both sides rod segment for being located at middle part circumferential direction external tooth one
There are one fracture induction slots, in other implementations, either two segments combined torque arm or monoblock type for setting in section
Torque arm can set multiple, fracture induction slot of different shapes in two sections of rod segments of external tooth both sides simultaneously in the middle, but
It is no matter how many different fracture induction slots are set thereon, influences to break in only rod segment of torsion rod segment limiter characteristic
The effective depth and effective width of induction slot are split, effective depth is the depth for the fracture induction slot for determining torque arm breakaway torque,
Effective width is the width for the fracture induction slot for determining torque arm torsional fracture angle；In other words, effective depth refers to torque arm
Depth capacity in upper all fracture induction slots, effective width refer to the maximum fracture induction slot of all depth on torque arm
The summation of slot bottom width.In first embodiment and second embodiment, the effective depth of the fracture induction slot of the torque arm 1a is
Its groove depth D, effective width i.e. its groove width L.
3rd embodiment will provide one while multiple variform fracture inductions be respectively provided in two sections of torsion rod segments
The torque arm of slot is illustrated in figure 6 the schematic diagram of third embodiment of the invention, one is equipped in belt reel shown in fig. 6
Torque arm 1 a identical by material, that effective length two sections of torque arms 1a and 1b different with diameter are composed, outside both ends
Tooth and middle part external tooth are end external tooth 1-2,1-3, middle part external tooth 1-1.2 shape differences are provided on wherein described torque arm 1a
Fracture induction slot, 3 variform fracture induction slots are provided on the torque arm 1b.Its circle of the torque arm 1a upper edges
Circumferential direction offers two circumferential separations induction slot 1a-a, the 1a-b coaxial with torque arm, and wherein depth maximum is described disconnected
Split induction slot 1a-a, thus the groove depth D that the effective depth of the fracture induction slot of the torque arm 1a is fracture induction slot 1a-aaa,
Effective width is the slot bottom width L of fracture induction slot 1a-aaa；Its circumferencial direction of the fracture induction slot 1b upper edges is offered and is turned round
There are three the coaxial annular settings of power bar, and circumferential separation induces slot 1b-a, 1b-b, 1b-c, the wherein groove depth of 1b-a and 1b-b most
Big groove depth is identical and bigger than the maximum groove depth of 1b-c, thus the effective depth of the fracture induction slot of the torque arm 1b is disconnected
Split the groove depth D of induction slot 1b-abaOr the depth capacity D of fracture induction slot 1b-bbbMax, effective width is fracture induction slot 1b-a
Groove width LbaThe groove width L of that section of slot corresponding with the depth capacity of fracture induction slot 1b-bbbmaxThe sum of Lba+Lbbmax.Due to Daa
=DbaOr DbbMaxSo that the breakaway torque of the torque arm 1a is identical with the breakaway torque of the torque arm 1b, but Laa<Lba+
Lbbmax, i.e., the long L of torsional deflection rod segment of described torque arm 1aaaTorsional deflection rod segment than the torque arm 1b is long Lba+Lbbmax
Short, when seat belt retractor mandrel rotates, the torsional deflection rod segment of the torque arm 1a is shorter, only need to reverse smaller angle
Twist off required deflection with regard to that can reach, thus its torsional fracture angle it is smaller will fracture failure first, realize first order limiter；
Mandrel is rotated further, and since the torque arm 1a has been broken, torque arm 1b can only be relied on to undertake the pressure of ribbon so that shown
The limiter value of torque arm 1 is substantially reduced, i.e., is worth smaller second level limiter into limiter.It can be seen that the torsion in the embodiment
Bar has the structure of the technique effect identical with the torque arm of above-mentioned the first and second embodiments, the in addition torque arm of the present embodiment
Other aspects and with form seat belt retractor assembling matching relationship it is identical with two above-mentioned embodiments, here not
It repeats again.
The present invention also protects a kind of seat belt retractor, which has used the torque arm of above-described embodiment.
It is applied to the technical detail in coiler about torque arm, the concrete structure of the coiler can be referring to above to torque arm description
Embodiment.Description is not repeated herein.
The present invention also protects a kind of safety belt assembly, which has used safety belt described in above-described embodiment to furl
Device, and advantageous effect caused by the coiler of above-described embodiment can be obtained.Coiler is matched to ribbon and other related zero
The assembling of part may refer to existing technology, here not reinflated discussion.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, any this field skill
Art personnel without departing from the spirit and scope of the present invention, can make possible variation and modification, therefore the guarantor of the present invention
Shield range should be subject to the range that the claims in the present invention are defined.
Claims (11)
1. a kind of torque arm for seat belt retractor, the seat belt retractor includes retractor frame and spool and torsion
Bar；The belt retractor frame includes two opposite side walls, and band is respectively arranged in the corresponding position in the two side
The round hole of internal tooth；The spool includes the through-hole that set along central axes and is used to wind the mandrel and separably of ribbon
It is respectively arranged at two end caps at mandrel both ends；The center of the end cap is provided with central pit hole or through-hole with internal tooth,
For fixing the two of the torque arm ends, and the end cap is circumferentially provided with and the internal tooth on the retractor frame
Matched external tooth, for spool described in locking；The middle section position of the through-hole of the mandrel axis line position is provided with internal tooth；Institute
It is in rod-shaped to state torque arm, and across the through-hole of the mandrel, both ends and middle part are both provided with circumferential external tooth, and the torsion
The circumferential external tooth at power bar both ends respectively in the central pit hole or through-hole of described two end caps on the coiler
Tooth matches, the internal tooth phase of the circumferential external tooth in the middle part of the torque arm and the middle section position of the through-hole of the mandrel position of center line
Cooperation, which is characterized in that at least one section in two sections of rod segments of the circumferential external tooth both sides in the middle part of the torque arm be provided with it is disconnected
Induction slot is split, and the fracture induction slot on two sections of torque arms is both provided with scheduled effective depth and effective width,
During so that the torque arm being reversed with the mandrel, one section in two sections of torsion rod segments is first broken.
2. the torque arm according to claim 1 for seat belt retractor, which is characterized in that it is described fracture induction slot be
Along the annular groove of the circumferencial direction of the torque arm.
3. the torque arm according to claim 2 for seat belt retractor, which is characterized in that it is described fracture induction slot with
The torque arm is coaxial.
4. the torque arm according to claim 3 for seat belt retractor, which is characterized in that it is described fracture induction slot be
Annular groove.
5. the torque arm according to claim 4 for seat belt retractor, which is characterized in that the fracture of the circular ring shape
Induction slot is provided with scheduled groove depth and groove width.
6. the torque arm according to claim 1 for seat belt retractor, which is characterized in that the fracture induction slot
Number is one.
7. the torque arm according to claim 1 for seat belt retractor, which is characterized in that the torque arm it is described
It is both provided with avoidance hypodontia on the circumferential external tooth at middle part, and avoids the position that tooth lacks and correspond to and ribbon end is passed through and fixed on mandrel
Fixing groove.
8. the torque arm according to claim 7 for seat belt retractor, which is characterized in that the torque arm is by two sections
Torque arm docks in an axial direction, and the both ends of every section of torque arm are both provided with circumferential external tooth, and two sections of torque arms dock end
The circumferential external tooth tooth form position of fixing groove that aligns and passed through on corresponding to mandrel and fix ribbon end be provided with
Avoid hypodontia；The circumferential external tooth of two sections of torque arms docking end collectively forms the circumferential external tooth in the middle part of the torque arm；Institute
The avoidance hypodontia stated on the circumferential external tooth of two sections of torque arm docking ends is collectively formed on the circumferential external tooth in the middle part of the torque arm
Avoidance hypodontia.
9. the torque arm according to claim 8 for seat belt retractor, which is characterized in that two sections of torque arms
Diameter, material, at least one of difference of effective length.
10. a kind of seat belt retractor, which is characterized in that the torque arm is turned round for 1 to 9 any one of them of the claims
Power bar.
11. a kind of safety belt assembly, which is characterized in that use the seat belt retractor described in the claims 10.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016112177834 | 2016-12-26 | ||
| CN201611217783 | 2016-12-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108238001A true CN108238001A (en) | 2018-07-03 |
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ID=62702917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710231648.3A Pending CN108238001A (en) | 2016-12-26 | 2017-04-11 | For the torque arm of seat belt retractor, seat belt retractor and safety belt assembly |
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|---|---|
| CN (1) | CN108238001A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20180703 Assignee: Songyuan Zhejiang automotive safety system Limited by Share Ltd Assignor: He Li Technology Co., Ltd. Contract record no.: 2018990000336 Denomination of invention: Torsion bar for safety belt retractor, safety belt retractor and safety belt assembly License type: Common License Record date: 20181207 |
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