WO2012003656A1 - 轮椅前叉避震结构 - Google Patents

轮椅前叉避震结构 Download PDF

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Publication number
WO2012003656A1
WO2012003656A1 PCT/CN2010/076547 CN2010076547W WO2012003656A1 WO 2012003656 A1 WO2012003656 A1 WO 2012003656A1 CN 2010076547 W CN2010076547 W CN 2010076547W WO 2012003656 A1 WO2012003656 A1 WO 2012003656A1
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WO
WIPO (PCT)
Prior art keywords
shaped body
front fork
wheelchair
mandrel
block
Prior art date
Application number
PCT/CN2010/076547
Other languages
English (en)
French (fr)
Inventor
龚毅
Original Assignee
厦门连科工业有限公司
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Publication date
Application filed by 厦门连科工业有限公司 filed Critical 厦门连科工业有限公司
Priority to DE212010000129U priority Critical patent/DE212010000129U1/de
Priority to US13/391,284 priority patent/US20130093155A1/en
Publication of WO2012003656A1 publication Critical patent/WO2012003656A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G3/00—Resilient suspensions for a single wheel
    • B60G3/02—Resilient suspensions for a single wheel with a single pivoted arm
    • B60G3/04—Resilient suspensions for a single wheel with a single pivoted arm the arm being essentially transverse to the longitudinal axis of the vehicle
    • B60G3/10—Resilient suspensions for a single wheel with a single pivoted arm the arm being essentially transverse to the longitudinal axis of the vehicle the arm itself being resilient, e.g. leaf spring
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1078—Parts, details or accessories with shock absorbers or other suspension arrangements between wheels and frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B1/00—Spoked wheels; Spokes thereof
    • B60B1/006—Spoked wheels; Spokes thereof specially adapted for light-weight wheels, e.g. of strollers or wheel-chairs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/0002—Castors in general; Anti-clogging castors assembling to the object, e.g. furniture
    • B60B33/0015—Castors in general; Anti-clogging castors assembling to the object, e.g. furniture characterised by adaptations made to castor
    • B60B33/0021—Castors in general; Anti-clogging castors assembling to the object, e.g. furniture characterised by adaptations made to castor in the form of a mounting pin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/0028—Construction of wheels; methods of assembling on axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/0036—Castors in general; Anti-clogging castors characterised by type of wheels
    • B60B33/0039—Single wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/0047—Castors in general; Anti-clogging castors characterised by details of the rolling axle
    • B60B33/0049—Castors in general; Anti-clogging castors characterised by details of the rolling axle the rolling axle being horizontal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/04—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors
    • B60B33/045—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors mounted resiliently, by means of dampers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2200/00—Type of product being used or applied
    • B60B2200/20—Furniture or medical appliances
    • B60B2200/22—Chairs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/10—Reduction of
    • B60B2900/131—Vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/80—Other vehicles not covered by groups B60Y2200/10 - B60Y2200/60
    • B60Y2200/83—Perambulators; Buggies; Strollers

Definitions

  • the invention relates to a wheelchair, in particular to a wheelchair front fork suspension structure.
  • the two front wheels of the wheelchair can be rotated 360 degrees, so they can play a guiding role, so that the wheelchair can be easily turned left and right. Therefore, although the front wheels are small, they play an extremely important role in wheelchairs.
  • the existing wheelchair front suspension structure is usually a suspension spring, which is often disposed on the front fork for fixing the front wheel or on the rotating shaft of the front fork.
  • a suspension spring which is often disposed on the front fork for fixing the front wheel or on the rotating shaft of the front fork.
  • the CN2925443Y patent predecessor filed on July 25, 2007, and the CN201150606Y patent issued on November 19, 2008 discloses a wheelchair front fork suspension structure that uses springs for shock absorption.
  • the spring suspension structure needs to be placed on the rotating shaft of the front fork or on the front fork, so that the overall shape of the front wheel is large, and the spring is easily exposed to rust, which may affect the shock absorption effect. It also affects the appearance of the product. If the spring is installed in the outer casing or the casing, additional components are required to be added, which makes the structure of the product too complicated, increases the manufacturing cost, and increases the volume and weight of the product.
  • the technical problem to be solved by the present invention is to provide a wheelchair front suspension structure with simple structure and light weight.
  • the technical solution of the present invention is:
  • a wheelchair front fork suspension structure is mounted on a fork body below a front fork, a mandrel is mounted on the front fork, and a U-shaped body is disposed above the front fork, and the mandrel is mounted on the body On the top of the sheet.
  • a U-shaped groove formed by the U-shaped body is provided with an elastic shock-absorbing block.
  • the shock block is provided with a mounting hole relative to the mandrel position.
  • the threaded section of the lower part of the mandrel extends into the mounting hole, and then passes through a nut below the mounting hole and is locked to the threaded section of the mandrel. on.
  • the shock block is provided with a slot relative to the upper piece of the U-shaped body. When installed, the shock block is inserted into the upper piece of the U-shaped body with its slot from the U-shaped opening side.
  • a baffle is disposed on both sides of the shock absorber block.
  • the U-shaped groove formed by the U-shaped body has a large groove diameter away from one end of the opening, and has a small groove diameter at one end of the opening.
  • the U-shaped groove formed by the U-shaped body is provided with an elastic shock-absorbing block having a shape corresponding to the shape of the U-shaped groove and being inserted into the U-shaped groove from one side of the U-shaped body during installation.
  • the present invention is provided with a U-shaped body above the front fork of the wheelchair front wheel, the mandrel with the front wheel mounted on the wheelchair bracket is fixed on the upper body of the U-shaped body, so that the U-shaped body is two-piece body.
  • the elastic deformation between them can eliminate the vibration force transmitted from the front wheel to achieve the shock absorption effect.
  • the structure is simple in structure, light in weight and small in appearance.
  • a shock absorber made of plastic or rubber may be further disposed in the U-shaped groove formed by the U-shaped body to further improve the shock-absorbing effect.
  • Figure 1 is a perspective view of a first embodiment of the present invention
  • Figure 2 is a side view of a first embodiment of the present invention
  • Figure 3 is an exploded perspective view of a second embodiment of the present invention.
  • Figure 4 is a perspective assembled view of a second embodiment of the present invention.
  • Figure 5 is a sectional view showing a combination of a second embodiment of the present invention.
  • Figure 6 is a perspective view of a third embodiment of the present invention.
  • Figure 7 is a side view of a third embodiment of the present invention.
  • Figure 8 is an exploded perspective view of a fourth embodiment of the present invention.
  • Figure 9 is a perspective assembled view of a fourth embodiment of the present invention.
  • Figure 10 is a cross-sectional view showing the assembly of a fourth embodiment of the present invention.
  • a wheelchair front fork suspension structure as shown in Figures 1 and 2, which is a first preferred embodiment of the present invention.
  • the front wheel 9 of the wheelchair is mounted on a front fork 1 on which a mandrel 2 is mounted.
  • the upper section of the mandrel 2 is mounted on a bracket of a wheelchair through a bearing (the bearing and the wheelchair bracket are not shown in the figure).
  • Draw Due to the arrangement of the bearings, the front fork 1 can be rotated 360 degrees, thereby driving the front wheels to rotate synchronously.
  • the key to the present invention is that a fork body 11 is disposed under the front fork 1 for mounting the front wheel 9, and a U-shaped body 12 is disposed above the front fork 1.
  • the mandrel 2 is mounted on the upper body of the U-shaped body 12. on.
  • the elastic force between the two bodies of the U-shaped body 12 can eliminate the vibration force transmitted from the front wheel 9, as shown in Fig. 2, thereby achieving the effect of damping. .
  • the present invention can provide an elastic shock absorbing block in the U-shaped groove of the U-shaped body 12, and the second embodiment shown in Figs. 3, 4, and 5 is such a structure.
  • the shock block 3 can be made of a plastic material. After the shock block 3 is added to the U-shaped groove of the U-shaped body 12, the shock block 3 can absorb some vibration force from the front wheel, thereby increasing the avoidance. Shock effect.
  • the user can select shock blocks of different hardness according to different use occasions and the weight of the user. The manufacturer can also use different color shock blocks to express different hardnesses for the user to select.
  • the mounting block 3 can be provided with a mounting hole 31 at a position relative to the mandrel 2, and the lower piece of the U-shaped body 12 is provided with a mounting groove 13.
  • the threaded section 21 of the lower section of the mandrel 2 extends into the mounting hole 31 and is passed under the mounting hole 31 by a nut 4 to be locked to the threaded section 21 of the mandrel 2.
  • the suspension block 3 is further provided with a slot 32 with respect to the upper piece of the U-shaped body 12 of the front fork 1, and the shock block 3 is installed with its slot 32 during installation.
  • a baffle 33 can be further disposed on both sides of the shock absorber block 3. After the installation, the baffles 33 on both sides block the U-shaped body 12 in the shock block 3, U The body 12 is covered in the shock block 3, that is to say, only the shock block 3 can be seen from the outside, so that the appearance is more compact and beautiful.
  • the U-shaped groove formed by the U-shaped body 12 of the front fork 1 has a large groove diameter away from the opening end and a small groove diameter at one end of the opening.
  • This structural change is for the front fork made of plastic. Since the strength of the plastic is not as strong as that of the metal, the front forks of the first and second embodiments can be made of metal, and the wall thickness of the U-shaped body is small. And the wall thickness can also meet the strength requirement.
  • the groove diameter outside the groove is increased by increasing the groove diameter inside the groove, and the strength requirement can be ensured under the premise of satisfying the elastic deformation. .
  • a shock absorber may also be disposed in the U-shaped groove of the front fork U-shaped body 12 according to the third embodiment to improve the shock absorbing effect, as shown in FIGS. 8 to 10.
  • the shape of the shock absorber 5 is equivalent to the shape of the U-shaped groove of the U-shaped body 12.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Vibration Dampers (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

提供一种轮椅前叉避震结构。轮椅前轮（9）安装在一前叉（1）下方的叉体（11）上，该前叉（1）上安装有一芯轴（2），前叉（1）的上方设有一U形体（12），所述芯轴（2）安装在该U形体（12）的上方片体上。通过U形体（12）两片体之间的弹性变形，可消除部分从前轮（9）传来的震动力，从而达到减震的效果。该轮椅前叉避震结构具有结构简单、重量轻巧且外观小巧的特点。

Description

轮椅前叉避震结构 技术领域
本发明涉及一种轮椅，尤指一种轮椅前叉避震结构。
背景技术
轮椅的两个前轮可以360度任意旋转，因此可以起到导向的作用，从而可以方便使轮椅进行左右转向。所以说，前轮虽小，但在轮椅中却扮演了极为重要的角色。
然而，由于前轮很小，受力较少，从上方来的压力较小，故只要轻微地震动，震动就会很明显，为了减小前轮的震动，一般都在前轮处设置有避震结构。现有的轮椅前轮避震结构通常为避震弹簧，该避震弹簧常设置在用于固定前轮的前叉上，或者前叉的转轴上。例如：于2007年7月25日授权公告的CN2925443Y专利前案，再如：于2008年11月19日授权公告的CN201150606Y专利，都公开了采用弹簧进行减震的轮椅前叉避震结构。这种以弹簧进行避震的结构，弹簧需套在前叉的转轴上，或者安装在前叉上，使前轮的整体外形体积较大，而且弹簧暴露在外容易生锈，会影响避震效果，还会影响产品的外观。如果将弹簧安装在外套或壳体之内，又需要额外增加与之相配的零部件，使产品的结构过于复杂，增加制造成本，还会增加产品的体积及重量。
发明内容
本发明所要解决的技术问题在于提供一种结构简单、重量轻的轮椅前叉避震结构。
为解决上述技术问题，本发明的技术解决方案是：
一种轮椅前叉避震结构，轮椅前轮安装在一前叉下方的叉体上，该前叉上安装有一芯轴，前叉的上方设有一个U形体，所述芯轴安装在该形体的上方片体上。
所述U形体形成的U形槽之内设置有一个具有弹性的避震块。
所述的避震块相对芯轴位置设置有一安装孔，安装时，芯轴下段的螺纹段伸入该安装孔，再以一螺帽从安装孔下方穿过并锁固在芯轴的螺纹段上。
所述的避震块相对U形体的上方片体设置有一插槽，安装时将避震块以其插槽从U形体开口一侧插在U形体的上方片体上。
所述的避震块两侧设置有挡片。
所述U形体所形成的U形槽远离开口的一端槽径大，而开口一端的槽径小。
所述U形体形成的U形槽之内设置有一个具有弹性的避震块，该避震块的形状与U形槽形状相当，且安装时从U形体的一侧插入到U形槽内。
采用上述方案后，由于本发明在轮椅前轮前叉的上方设置了一个U形体，将前轮安装在轮椅支架上的芯轴固定在U形体的上方片体上，这样通过U形体两片体之间的弹性变形，可消除部分从前轮传来的震动力，以此达到减震的效果。该结构相对于以弹簧为主要减震装置来说，结构精简，重量轻巧，外观也小巧。此外，该U形体形成的U形槽内还可再设置以塑料或橡胶制成的避震块，以进一步提高避震效果。
附图说明
图1是本发明第一实施例的立体示意图；
图2是本发明第一实施例的侧视图；
图3是本发明第二实施例的立体分解图；
图4是本发明第二实施例的立体组合图；
图5是本发明第二实施例的组合剖视图；
图6是本发明第三实施例的立体示意图；
图7是本发明第三实施例的侧视图；
图8是本发明第四实施例的立体分解图；
图9是本发明第四实施例的立体组合图；
图10是本发明第四实施例的组合剖视图。
具体实施方式
下面结合附图和具体实施例对本发明作进一步详述。
本发明所揭示的是一种轮椅前叉避震结构，如图1及图2所示，为本发明的第一较佳实施例。所述的轮椅前轮9安装在一前叉1上，该前叉1上安装有一芯轴2，该芯轴2的上段通过轴承安装在轮椅的支架上（轴承与轮椅支架在图中均未画出）。由于轴承的设置，使前叉1可以做360度旋转，从而可带动前轮同步旋转。
本发明的关键在于：所述的前叉1下方设有叉体11用于安装前轮9，其上方设有一个U形体12，所述的芯轴2安装在该U形体12的上方片体上。
由于前叉1的上方设置了U形体12，通过U形体12两片体之间的弹性变形，可消除部分从前轮9传来的震动力，如图2所示，从而达到减震的效果。
为了进一步提高减震效果，本发明可以在U形体12的U形槽之内设置一个具有弹性的避震块，如图3、4、5所示的第二实施例即为此种结构。所述的避震块3可以以塑料材质制成，在U形体12的U形槽内增加了避震块3之后，通过该避震块3可以吸收部分来自前轮的震动力，从而增加避震效果。使用者可以根据不同的使用场合，以及使用者的重量来选择不同硬度的避震块，厂家也可以用不同颜色的避震块表示不同的硬度，以供使用者选用。
为了方便安装，所述避震块3相对芯轴2位置可设置一安装孔31，所述的U形体12的下方片体上设有安装槽13。安装时，将芯轴2下段的螺纹段21伸入该安装孔31，再以一螺帽4从安装孔31下方穿过以锁固在芯轴2的螺纹段21上。此外，为了使避震块3安装后不晃动，所述避震块3相对前叉1的U形体12的上方片体还设置有一插槽32，安装时将避震块3以其插槽32从U形体12开口一侧插在U形体12的上方片体上，然后将芯轴2下段的螺纹段21伸入安装孔31由螺帽4锁固，芯轴2上的凸台22则抵于避震块3的上端面将避震块3压紧固定。再者，为了使产品外观简洁美观，所述的避震块3两侧可再设置一挡片33，安装后，则两侧的挡片33将U形体12遮挡在避震块3内，U形体12被包覆于避震块3之内，也就是说从外观看仅能看到避震块3，因此外观更为简洁美观。
如图6、7所示，为本发明的第三实施例。本实施例与上述第一实施例的区别在于：所述前叉1的U形体12所形成的U形槽结构为远离开口一端槽径大，而开口一端的槽径小。这种结构的改变是为适用以塑料制成的前叉，由于塑料的强度不如金属制成强，实施例一和二所述的前叉可以以金属材质制成，U形体的壁厚较小且壁厚一致也可以满足强度要求，而对于以塑料材质制成的前叉来说，通过增加槽内部的槽径而较小槽外侧的槽径，在满足弹性变形的前提下可以保证强度要求。
上述第三实施例所述的前叉U形体12的U形槽内也可以设置一避震块以提高避震效果，如图8至图10所示。所述的避震块5的形状与所述U形体12的U形槽形状相当，安装时，将避震块5从U形体12的一侧插入到U形槽内即可完成安装。

Claims (7)

1、一种轮椅前叉避震结构，轮椅前轮安装在一前叉下方的叉体上，该前叉上安装有一芯轴，其特征在于：所述前叉的上方设有一个U形体，所述芯轴安装在该形体的上方片体上。
2、根据权利要求1所述的轮椅前叉避震结构，其特征在于：所述U形体形成的U形槽之内设置有一个具有弹性的避震块。
3、根据权利要求1所述的轮椅前叉避震结构，其特征在于：所述的避震块相对芯轴位置设置有一安装孔，安装时，芯轴下段的螺纹段伸入该安装孔，再以一螺帽从安装孔下方穿过并锁固在芯轴的螺纹段上。
4、根据权利要求1所述的轮椅前叉避震结构，其特征在于：所述的避震块相对U形体的上方片体设置有一插槽，安装时将避震块以其插槽从U形体开口一侧插在U形体的上方片体上。
5、根据权利要求1所述的轮椅前叉避震结构，其特征在于：所述的避震块两侧设置有挡片。
6、根据权利要求1所述的轮椅前叉避震结构，其特征在于：所述U形体所形成的U形槽远离开口的一端槽径大，而开口一端的槽径小。
7、根据权利要求6所述的轮椅前叉避震结构，其特征在于：所述U形体形成的U形槽之内设置有一个具有弹性的避震块，该避震块的形状与U形槽形状相当，且安装时从U形体的一侧插入到U形槽内。
PCT/CN2010/076547 2010-07-08 2010-09-02 轮椅前叉避震结构 WO2012003656A1 (zh)

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