• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    DRIVE WHEEL FOR BELT TENSIONER AND BELT TENSIONER FOR SAFETY BELT SYSTEMA drive wheel (14) for a belt tensioner is adapted to be coupled to a belt roll and comprises an outer tooth system including plural teeth (30) distributed along the circumference. The teeth (30) are angled in a first circumferential direction B and / or the teeth (30) have at least one end face (36) facing away from the central axis A of the drive wheel (14) and being tilted in a first circumferential direction B and / or the clearances (42) between neighboring teeth (30) are not symmetrical in relation to the planes defined by the radial and axial direction. In addition, the teeth (30) have no symmetry in relation to the E planes extending tangentially in relation to the circumferential direction. A belt tensioner for a seat belt system comprises a force transmission element (20) and means for driving the force transmission element (20). The belt tensioner also comprises an articulated drive wheel (14) of the type described above having an external tooth system in which the force transmission element (20) acts on the activation of the drive means in order to rotate the drive wheel. drive (14).
    公开号:BR112013012330A2
    申请号:R112013012330-3
    申请日:2011-08-11
    公开日:2020-08-04
    发明作者:Bernd Gentner；Thomas Moedinger；Andreas Pregitzer
    申请人:Trw Automotive Gmbh；
    IPC主号:
    专利说明:

    »1/9 DRIVE WHEEL FOR BELT TENSIONER AND BELT TENSIONER
    FOR THE SAFETY BELT SYSTEM The invention relates to a drive wheel for a belt tensioner. The invention further relates to a belt tensioner 5 for a seat belt system comprising such a wheel unit.
    From DE 10 2006 031 359 A belt tensioner for a seat belt system is known comprising a drive unit and a transmission element with a force which, after activation of the drive unit, acts on a coupled drive wheel or adapted to be attached to the retractor belt shaft.
    The drive wheel can be a sprocket or an impeller wheel. The force transmission element consists of a substantially deformable material so that a damping adjustment of the force transmission element takes place on the drive wheel. The tooth-to-tooth problem occurring in a non-resilient toothed rack as a force-transmission element can be avoided in this way.
    It is the aim of the invention to further optimize the torque transmission between the force transmission element and the wrong drive wheel such a type of belt belt tensioner to obtain the maximum feeding.
    This objective is achieved by a drive wheel which comprises the characteristics of claim 1, as well as by a belt tensioner comprising the characteristics of claim 7. Advantageous and convenient configurations of the drive wheel of accordion 30 with the invention and of belt tensioner according to
    * 2/9 invention are presented in the corresponding dependent claims.
    The drive wheel for a belt tensioner according to the invention is adapted to be coupled to a belt roll and comprises an external tooth system having teeth distributed along the circumference. The teeth are inclined in a first circumferential direction and / or the teeth have at least one end face facing outwardly from the central axis of the drive wheel and being inclined in a first circumferential direction, and / or the gaps between teeth neighbors are not symmetric in relation to the planes defined by the radial and axial direction. Furthermore, the teeth according to the invention do not show symmetry with respect to the planes extending tangentially to the circumferential direction.
    According to the invention, by "an outboard system having teeth distributed along the circumference" also blades or blades of a 20 impeller wheel are to be understood.
    The invention is based on the finding that the iiorma of the teeth of the drive wheel substantially influences the efficiency in converting the innovation of the force transmission element (substantially linear at the moment of contact) to a rotation of the driving wheel.
    It has been found that a drive wheel that has a tooth supply according to the invention allows a definitely better torque transmission compared to a drive wheel that has a classic external tooth structure, 30 especially when using a driving element. streaming
    [3/9 non-toothed force consisting of deformable substance material.
    In general, the drive output and the drive behavior of the tensioner can be adapted to different requirements within the scope of the invention by choosing the tooth shape appropriately, also with regard to the case of a blocked drive wheel. Ern particular, in relation to the concrete tooth shape, the tooth angle, the tooth crest angle, the depth of penetration inward of the force transmission element, the chip space, the crest radius, the diameter of drive wheel, the tooth height and the shape of the tooth surface, within the criteria referred to in accordance with the invention a design tolerance is provided, through which the drive output and the belt tensioner drive behavior can be be influenced specifically.
    The drive wheel according to the invention furthermore has the advantage that material abrasion ("scraping") is minimized or completely avoided both on the side of the drive wheel and on the side of the force transmission element. Thus, on the one hand, the particles are prevented from loosening and, on the other hand, a reduction in efficiency is counteracted.
    According to a further development of the invention, the drive wheel includes plural axial partial drive wheels arranged in series with at least one of which satisfies at least one of the aforementioned criteria according to the invention. In this way, even more options of variations are resulting for 30 c) design of the drive wheel that an individual attachment still for certain requirements is possible. Partial drive wheels can be made from inexpensive forage as perforated parts.
    Especially the partial drive wheels can be staggered so that the effective number of teeth absorbing the torque is increased.
    It is another possibility of influencing the adjustment of the force transmission element to design the external tooth system as helical gear by means of less in 10 portions.
    Finally, the teeth of the external tooth system can also be twisted around radial axes in relation to the remaining drive wheel.
    Regardless of the concrete shape of the teeth according to the invention, the drive wheel can be formed in part or integrally with a belt retractor shaft, such as sefa, the advantages of the invention can be used without restriction even in such a degree that reduces the components.
    20 The invention also provides a belt tensioner for a seat belt system comprising a force transmission element and a means for driving the force transmission element. The belt tensioner further comprises an articulated drive wheel according to the invention 25 having an external tooth system in which the force transmission element acts by activating the driving means so as to touch the driving wheel.
    The advantages of the invention are particularly emphasized when using a transmission force of 30 force, preferably integrally formed of a material that is substantially deformable. By a substantially deformable material an material is understood to be macroscopically deformed, for example, when in contact with the drive wheel. Examples distc) are 5 EPDM materials of various "Shore" hardness (Shore 70-95), rubber, natural rubber or thermoplastic (soft) materials (polyamides). Also an ideal plastic compound such as clay or clay with or without a hose-like coating is taken into account. Deformations or abrasions of materials 10 within the microscopic range as they occur when a common derive rack contacts a gear wheel or separation of fractions from the force transmitting element (breakage, shear, etc.) are not addressed in this context.
    15 A larger contact surface and, therefore, better torque transmission are the result of the fact that the force transmission element drives the drive wheel in a second circumferential direction opposite to the first circumferential direction.
    20 Other features and advantages of the invention result from the following description and the accompanying drawings, which are referred to, showing: - Figure 1 is an exploded view of a belt retractor comprising a belt tensioner according to the invention; Figure 2 is a sectional view of the mounted belt retractor; Figure 3 shows an axial view of a drive wheel according to the invention; 30 - Figure 4 is a perspective view of the wheel
    -
    G r 6/9 activation of Figure 3; - each of Figures 5a, 5b to 10a, 10b is an axial view or in perspective of other features of the drive wheel according to the invention; and 5 - Figures 11a, 11b are an axial or perspective view of a different mode than drive wheel according to the invention.
    In Figure 1, the substantial components of a belt retractor comprising a pyrotechnic drive belt tensioner are shown. In Figure 2, the belt retractor is illustrated on the mounted station.
    A belt retractor 12 on which the belt can be rolled up or from which the belt can be removed is articulated in a retractor frame 10. A drive wheel 14 having an external tooth system is articulated on the frame 10. The drive wheel í4 is permanently attached to the axle (belt roll 12) of the belt retractor or can selectively be attached to the center. In the first case, the drive wheel 14 can be formed in part or integrally with c) belt retractor shaft.
    The belt tensioner of the belt retractor also has a pyrotechnic drive unit including a lighter 16 and a power transmission element 20 arranged in a tensioner tube 18 and adapted to be driven by the drive unit. The force transmission element 20 is preferably integrally formed from a substantially deformable solid material. The components of the belt tensioner are at least partially accommodated in a tensioner housing 22 attached to the retractor frame 10.
    .
    <7/9 In addition, a stop disk 24, a helical spring 26 arranged therein and a cover 28 are attached to the drive wheel 14. These components form a spring urrtate of the belt retractor, as it is called, which 5 is not important for the function of the belt tensioner, however.
    In Figure 3, a modification of the driving wheel í4 is shown. The drive wheel 14 has a central axis A on which it is rotatable in the mounted state of the belt tensioner. Consequently, the following axial directions mean directions along the central axis A, radial directions mean directions along a radius from the central axis A and circumferential directions mean directions eni parallel to the direction of rotation of the drive wheel 14.
    The drive wheel 14 includes an external tooth system having a number of teeth 30 distributed along the circumference. The teeth 30 can be distributed, as shown in Figure 3, evenly, or irregularly.
    20 According to a first criterion, teeth 30 are incinerated in a first circumferential direction B, that is, either the flanks 32, 34 of a tooth 30 (or substantial portions of the flanges 32, 34) are inclined in the circumferential direction B or any of the flanks 32, 34 (or 25 a substantial portion of said flank) is inclined more strongly in the first circumferential direction B than the other flank (or a substantial portion of said flank) in the opposite circumferential direction C. The lines central teeth do not intersect c) central axis of the drive wheel.
    µ ~; 8/9 According to a second criterion, the end faces 36 of teeth 30 are inclined in the first circumferential direction B, that is, starting from.,.
    ridge 38 of a tooth 36 (the point of the tooth 30 which is at the end 5 distant from the central axis A) the end face 36 declines in the first circumferential direction B with respect to the base 40 of the tooth 30 accordingly. shown in Figure 3 by the angle cx which is less than 90 6 The end faces 36 of the teeth 36, thus, are not machined either in a circular or tangential shape or else symmetrically in relation to the planes defined by the radial and axial direction.
    According to a third criterion, the clearances 42 between two adjacent teeth 30 are not symmetrical in relation to the planes defined by the radial and axial direction.
    15 According to a fourth criterion, teeth 30 do not show symmetry errt in relation to the planes extending tangentially in relation to a circumferential direction.
    In Figure 3, this plan E is exemplified.
    In the assembled state of the belt tensioner 14 the drive wheel 20 is arranged so that the force transmission element moved in a direction D drives the drive wheel 14 in the second circumferential direction C.
    Thus, a relatively large contact surface appears for the transmission element with the irrtact force 25 implying an improved torque transmission.
    Figures 5a, 5b for 10a, 10b show six modalities that satisfy the first and / or the second and / or the third and fourth of the mentioned µi criteria.
    In Figures 1 and 11, an example of a modality is shown in which the drive wheel 14 is composed of i - r 9/9 plural parts axially disposed in series. Each part alone constitutes a partial drive wheel 44a, 44b and 44C. At least one partial drive wheels 44a, 44b, 44C, preferably all partial drive wheels 44a, 44b, 44C satisfy or satisfy the first and / or second and / or third and fourth of the aforementioned criteria . The partial drive wheels 44a, 44b, 44C are staggered. The partial drive wheels 44a, 44b, 44C can be manufactured as perforated parts.
    10 According to another periodicity (not shown), the external tooth system of the drive wheel 14 has the form of a helical gearing at least in portions.
    Twisting of the teeth 30 around radial axes in relation to the remaining drive wheel 14 is also possible. In any case, however, the first and / or the second and / or c) third and c) fourth of the criteria mentioned above are / are satisfied.
    权利要求:
    Claims (1)
    [1]
    1. Drive wheel (14) adapted to be coupled to a belt rod (12) for a belt tensioner comprising an external tooth system including 5 plural teeth (30) distributed along the circumference, characterized by the fact that the teeth (30) are angled in a first circular direction B, and / or the teeth (30) have at least one end face (36) facing away from the central axis A of the drive wheel (14) and being angled first circumferential direction B, and / or the Clearances (42) between neighboring teeth (30) are not symmetrical in relation to the planes defined by the radial and axial direction, and the teeth (30) have no symmetry in relation to the planes E extending tangentially in relation to a circumferential direction.
    2. Drive wheel (14) according to claim 1, characterized by the fact that the drive wheel (14) comprises plural partial drive wheels (44a, 44b, 44c) axially arranged in series.
    3- Drive wheel (14), according to claim 2, characterized by the fact that the partial drive wheels (44a, 44b, 44C) are staggered.
    4. Drive wheel (14), according to any one of claims 1, 2 or 3, characterized by the fact that the external tooth system is formed as a helical gear at least in portions.
    5. Drive wheel (14), according to any agreement
    T and 2/3 one of claims 1, 2, 3 or 4, characterized by the fact that at least some of the conients (30) are twisted around radial axes in relation to the remaining drive wheel (14).
    6. Drive wheel (14) according to any one of claims 1, 2, 3, 4 or 5, characterized by the fact that the drive wheel (14) is formed in part partly or integrally with an axle of belt retractor.
    7. Belt tensioner for a safety belt series 10, comprising a force transmission element (20) means to actuate the force transmission element, characterized by the fact that 15 an articulated drive shaft (14) one of claims 1, 2, 3, 4, 5 or 6, comprises an external tooth system in which c) force transfer element (20) acts on the activation of the drive means in order to rotate the drive wheel { 14).
    8. Belt tensioner according to claim 7, characterized in that the force transfer element (20) is formed by a substantially deformable solid material.
    9. Belt tensioner according to claim 8, 25 characterized by the fact that the force transmission element (20) is covered in only one part.
    10. Belt tensioner, according to any one of claims 7, 8 or 9, characterized in that the drive wheel (14) is arranged in such a way that the power transmission element 30 (20) drives the drive wheel action
    .C 3/3
    (14) in a second circumferential direction C opposite the first circumferential direction B.
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    法律状态:
    2020-08-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-08-25| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-12-08| B11B| Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements|
    2021-11-03| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    优先权:
    申请号 | 申请日 | 专利标题
    DE102010051419.5|2010-11-17|
    DE102010051419A|DE102010051419A1|2010-11-17|2010-11-17|Drive wheel for belt tensioners and belt tensioners for safety belt system|
    PCT/EP2011/004026|WO2012065656A1|2010-11-17|2011-08-11|Driving wheel for seatbelt tensioners and seatbelt tensioners for a seatbelt system|
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