WO2010037328A1 - 可制动的脚轮 - Google Patents

可制动的脚轮 Download PDF

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Publication number
WO2010037328A1
WO2010037328A1 PCT/CN2009/074104 CN2009074104W WO2010037328A1 WO 2010037328 A1 WO2010037328 A1 WO 2010037328A1 CN 2009074104 W CN2009074104 W CN 2009074104W WO 2010037328 A1 WO2010037328 A1 WO 2010037328A1
Authority
WO
WIPO (PCT)
Prior art keywords
damper
wheel
gear
caster according
brakeable
Prior art date
Application number
PCT/CN2009/074104
Other languages
English (en)
French (fr)
Inventor
邱营
方立明
许金元
马杰
Original Assignee
珠海百亚电子科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CNU2008202015069U external-priority patent/CN201291713Y/zh
Priority claimed from CNU2008202021303U external-priority patent/CN201277295Y/zh
Application filed by 珠海百亚电子科技有限公司 filed Critical 珠海百亚电子科技有限公司
Priority to US12/864,159 priority Critical patent/US8464843B2/en
Publication of WO2010037328A1 publication Critical patent/WO2010037328A1/zh

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00Castors in general; Anti-clogging castors
    • B60B33/02Castors in general; Anti-clogging castors with disengageable swivel action, i.e. comprising a swivel locking mechanism
    • B60B33/021Castors in general; Anti-clogging castors with disengageable swivel action, i.e. comprising a swivel locking mechanism combined with braking of castor wheel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00Castors in general; Anti-clogging castors
    • B60B33/0002Castors in general; Anti-clogging castors assembling to the object, e.g. furniture
    • B60B33/0005Castors in general; Anti-clogging castors assembling to the object, e.g. furniture characterised by mounting method
    • B60B33/0007Castors in general; Anti-clogging castors assembling to the object, e.g. furniture characterised by mounting method by screwing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00Castors in general; Anti-clogging castors
    • B60B33/0002Castors in general; Anti-clogging castors assembling to the object, e.g. furniture
    • B60B33/0015Castors in general; Anti-clogging castors assembling to the object, e.g. furniture characterised by adaptations made to castor
    • B60B33/0021Castors 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00Castors in general; Anti-clogging castors
    • B60B33/0028Construction of wheels; methods of assembling on axle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00Castors in general; Anti-clogging castors
    • B60B33/0036Castors in general; Anti-clogging castors characterised by type of wheels
    • B60B33/0039Single wheels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00Castors in general; Anti-clogging castors
    • B60B33/0047Castors in general; Anti-clogging castors characterised by details of the rolling axle
    • B60B33/0049Castors in general; Anti-clogging castors characterised by details of the rolling axle the rolling axle being horizontal
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00Castors in general; Anti-clogging castors
    • B60B33/0047Castors in general; Anti-clogging castors characterised by details of the rolling axle
    • B60B33/0057Castors in general; Anti-clogging castors characterised by details of the rolling axle the rolling axle being offset from swivel axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00Castors in general; Anti-clogging castors
    • B60B33/006Castors in general; Anti-clogging castors characterised by details of the swivel mechanism
    • B60B33/0065Castors in general; Anti-clogging castors characterised by details of the swivel mechanism characterised by details of the swivel axis
    • B60B33/0068Castors in general; Anti-clogging castors characterised by details of the swivel mechanism characterised by details of the swivel axis the swivel axis being vertical
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00Castors in general; Anti-clogging castors
    • B60B33/006Castors in general; Anti-clogging castors characterised by details of the swivel mechanism
    • B60B33/0065Castors in general; Anti-clogging castors characterised by details of the swivel mechanism characterised by details of the swivel axis
    • B60B33/0073Castors in general; Anti-clogging castors characterised by details of the swivel mechanism characterised by details of the swivel axis the swivel axis being symmetrical to wheel or wheels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00Castors in general; Anti-clogging castors
    • B60B33/0078Castors in general; Anti-clogging castors characterised by details of the wheel braking mechanism
    • B60B33/0092Castors in general; Anti-clogging castors characterised by details of the wheel braking mechanism actuated remotely, e.g. by cable or electrically
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62BHAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B5/00Accessories or details specially adapted for hand carts
    • B62B5/04Braking mechanisms; Locking devices against movement
    • B62B5/0404Braking mechanisms; Locking devices against movement automatic
    • B62B5/0423Braking mechanisms; Locking devices against movement automatic braking or blocking when leaving a particular area
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62BHAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B5/00Accessories or details specially adapted for hand carts
    • B62B5/04Braking mechanisms; Locking devices against movement
    • B62B5/0452Braking mechanisms; Locking devices against movement by hydraulic means

Definitions

  • the present invention relates to a caster, and more particularly to a caster with a brake mechanism.
  • a main object of the present invention is to provide a brakeable caster that can prevent sudden locking and can function as an anti-theft function.
  • a brakeable caster including a wheel carrier and a wheel body assembly rotatably supported on the wheel frame, the wheel frame is provided with a function
  • a brake mechanism comprising: a controller having a signal receiving portion, a locking device controlledly coupled to the controller, and a rotary damper including a housing having a limiting structure and the housing
  • the inner damper wheel, the outer casing is separated or matched with the locking device by its limiting structure to form a rotatable free state or a non-rotatable locking state, and the damper wheel is drivingly coupled to the wheel body assembly.
  • the locking device includes a driving portion, a transmission portion, and an execution portion.
  • the driving portion is a motor;
  • the transmission portion is a reduction gear set;
  • the execution portion includes a lock lever and a rotary head acting on the lock lever, the rotary head is coupled to the reduction gear set, and the lock lever is provided with elasticity Reply to the part.
  • the rotary head is preferably a cam, and the resilient return member is preferably a torsion spring.
  • the damper wheel is rotatably disposed in the outer casing, and a closed cavity is formed between the outer casing and the damper wheel, the damping oil is sealed in the closed cavity; and the outer casing and the damper wheel are disposed between A seal that prevents damping oil from leaking.
  • the damper wheel includes a bottom wall, a central portion, a first annular wall and a second annular wall, and a first annular groove is formed between the first annular wall and the second annular wall, and the second annular shape a second annular groove is formed between the wall and the central portion;
  • the inner surface of the outer casing has a third annular wall that forms a clearance fit with the first annular groove and a fourth annular wall that forms a clearance fit with the second annular groove .
  • the center portion has a through-waist bearing hole that is circumferentially fixed to a rotating shaft.
  • damper wheel and the outer casing are provided with mutually staggered annular grooves and annular walls, a gap fit is formed between the annular wall and the annular groove, so that the damper wheel is enlarged during the rotation of the damper wheel relative to the outer casing. Damping the frictional area of the oil, so that the damping value can be increased without increasing the damper volume or the viscosity of the damping oil.
  • the bottom wall of the damper wheel is formed with a plurality of cavities, and each of the cavities is provided with an oil storage cotton.
  • the outer casing includes a base and a cover that are sealed to each other by screws, and the seal is disposed between the base and the cover, between a central portion of the damper wheel and the base, and the center portion Between the covers.
  • the base is provided with a first oil filling port that communicates with the closed cavity
  • the cover is provided with the dense connection
  • the second oil filling port of the closed cavity, the first oil filling port and the second oil filling port are respectively closed by the first sealing member and the second sealing member.
  • the circumferential side of the outer casing has a stop structure engageable with a locking device.
  • the limiting structure is a plurality of tile-shaped grooves uniformly spaced along the circumferential side.
  • the outer casing and the damper wheel may be cylindrical metal pieces.
  • the wheel body assembly includes a tire body, a bearing, and a first gear, and the bearing and the first gear are coaxially coupled to the tire body.
  • the damper wheel of the damper is coupled to the first gear through a gear transmission mechanism, the gear transmission mechanism includes a gear shaft and a damper axle that are parallel to each other, and one end of the gear shaft meshes with the first gear through a second gear.
  • the other end of the gear shaft meshes with a fourth gear at one end of the damper axle through a third gear, and the damper axle is circumferentially fixed with the damper wheel.
  • the wheel carrier includes a metal connecting bracket and a plastic housing that houses the controller, the locking device, and the rotary damper.
  • the wheel body assembly may be disposed in a middle or substantially intermediate position of the plastic housing, or may be disposed on one side of the plastic housing.
  • Figure 1 is a perspective view of a preferred embodiment of a caster of the present invention
  • Figure 2 is an exploded view of the caster of Figure 1;
  • Figure 3 is an exploded view of the wheel assembly of Figure 2;
  • Figure 4 is a front elevational view of the damper of Figure 2;
  • Figure 5 is a cross-sectional view taken along line A-A of Figure 4.
  • Figure 6 is an exploded view of the damper of Figure 2;
  • Figure 7 is an exploded perspective view of another view of the damper of Figure 2;
  • Figure 8 is a front elevational view of the caster of Figure 1;
  • Figure 9 is a cross-sectional view taken along line BB of Figure 8;
  • Figure 10 is a cross-sectional view taken along line EE of Figure 8;
  • Figure 31 is a cross-sectional view taken along line C-C of Figure 10;
  • Figure 12 is a schematic view of the unlocked state of the caster shown in Figure 1;
  • Figure 13 is a second schematic view of the unlocking state of the caster shown in Figure 1;
  • Figure 14 is a schematic view showing the locked state of the caster shown in Figure 1.
  • the caster mainly comprises an iron bracket 21, a plastic housing and a wheel body assembly 11.
  • the plastic housing is composed of a main body 13 and a detachable and separate controller cover 10 on both sides of the main body 13. It is constructed with a gearbox cover 19.
  • a controller having a signal receiving portion, a locking device 14 and a rotary damper 17 are mounted in a cavity between the main body 13 and the controller cover 10.
  • the gear shaft 12, the bearing 16, the second gear 48, the third gear 45, the fourth gear 15, and the retaining spring 18 are located in the cavity between the main body 13 and the gear case cover 19.
  • the damper axle 20 sequentially passes through the fourth gear 15, the main body 13, and the damper 17, and its both ends are supported on the bearing 16 and the bearing 25, respectively.
  • the wheel body assembly 11 is mounted on an iron bracket 21 by an axle not shown.
  • the wheel assembly 11 includes a tire body 22, a bearing 23, a first gear 24, and a first gear 24, a bearing by a screw. 23 is locked with the tire body 22.
  • the first gear 24 is also rotated together.
  • the damper 17 includes a substantially cylindrical metal casing 4 composed of a cover 31 and a base 37, and a plurality of tile-shaped limiting slots are evenly spaced on the circumferential side of the casing 4. 47, for cooperating with a locking device, so that the outer casing 4 can be stationary in the circumferential direction.
  • the cover 31 is fixedly coupled to the base 37 by a plurality of screws 30, and a large 0-type sealing jaw 34 is disposed between the base 37 and the cover 31.
  • the base 37 has a first oil filling port 2
  • the cover 31 has a second oil filling port 3, a first oil filling port 2 and a second
  • the oil filler ports 3 are each closed by a sealing screw 32 with a smaller O-ring seal 33.
  • a substantially cylindrical metal damper wheel 35 is rotatably disposed in the outer casing 4 formed by the base 37 and the cover 31.
  • the damper wheel 35 includes a bottom wall 354, a central portion 351, a first annular wall 355 and a second annular wall 356, and a first annular groove is formed between the first annular wall 355 and the second annular wall 356.
  • a second annular groove 358 is formed between the second annular wall 356 and the central portion 351;
  • the inner surface of the base 37 has a third annular wall 371 and a second annular groove formed with a clearance fit with the first annular groove 357 358 forms a clearance-fitted fourth annular wall 372.
  • a 0-type sealing jaw 38 is provided between the central portion 351 of the damper wheel 35 and the base 37 and between the central portion 351 and the cover 31.
  • a closed chamber is formed between the outer casing 4 and the damper wheel 35, and the first oil filling port 2 and the second oil filling port 3 communicate with the closed chamber.
  • the center portion 351 of the damper wheel 35 has a waist-shaped through bearing hole 352 which is circumferentially fixed to the rotation axis of the control object.
  • Four cylindrical oil-filled cotton 39 are disposed in four circular cavities 353 on the bottom wall 354 of the damper wheel 35.
  • the sump oil 39 absorbs part of the damping oil to keep the internal pressure and damping of the damper constant, and when the damper wheel 35 is stationary relative to the outer casing 4, the damping oil returns to normal temperature. 39 Release some of the damping oil to keep the internal pressure and damping of the damper constant.
  • the damper 1 works by: injecting the damping oil 36 into the closed chamber via the first oil filling port 2 or the second oil filling port 3, and during the oil filling process, the other oil filling port is used for exhausting, so as to be sealed. A vacuum is formed in the cavity.
  • the oil filling is completed, close the two oil filling ports with two sealing screws 32 to ensure that the damping oil 36 does not leak.
  • the locking device 45 is engaged with the limiting groove 47 distributed on the circumferential side of the outer casing 4 to restrict the rotation of the outer casing 4, the same damper wheel 35 is driven by the rotating shaft of the bearing hole 352, and the damper wheel 35 is opposed to the outer casing.
  • the damping oil 36 sealed in the closed cavity flows through the gap between each annular groove and each annular wall, and generates a resistance to the damper wheel 35, hindering the relative displacement of the damper wheel 35 relative to the outer casing 4. Rotate to reduce the rotational speed of the damper wheel 35. If you want a relative rotation between them, you must have enough external force.
  • the damper axle 20 is sheathed by three bearings 16, 46 and 25, and the damper 17 is mounted in a cavity composed of the main body 13 and the controller cover 10 and the gear case cover 19. Since the waist shaft of the damper axle 20 cooperates with the waist-shaped through hole on the damper 17 to form a circumferential fixing, the gear shaft 12 rotates to drive the third gear 45 to rotate, and the third gear 45 drives the fourth gear 15 to rotate. The fourth gear 15 drives the damper wheel shaft 20 to rotate, and then the damper wheel 35 drives the entire damper 17 to rotate together.
  • the security system of the shopping mall sends the lock signal to the signal receiving part of the controller through radio frequency, etc.
  • the controller controls The motor inside the locking device 14 moves, and the motor rotates the cam rotating head 41 by 90 degrees through the reduction gear set inside the locking device 14, and the motor stops rotating. Since the lock lever 42 is positioned on the lock lever shaft 101 of the controller cover 10, the lock lever 42 can only move circularly around the lock lever shaft 101 on the controller cover 10. Under the action of the torsion spring 44, the lock lever 42 rotates in the direction of the reverse stitch in Fig. 13 until it is held by the rotary head 41. Thus, the position of the lock lever 42 is as shown in Fig.
  • the security system of the shopping mall sends the unlocking signal to the controller for signal reception by means of radio frequency or the like.
  • the controller controls the movement of the motor inside the locking device 14, and the motor drives the cam rotating head 41 to rotate the cam through the reduction gear set inside the locking device 14 to cause the locking lever 42 to be located on the cam surface of the rotating head 41.
  • the casters of the above structure can ensure that the trolley can only be used within its allowed range. If the trolley exceeds the prescribed use area, the brake mechanism of the caster works, and the opponent cart produces a large resistance, so that the user It is difficult to continue to push the trolley to achieve the anti-theft function.
  • the caster has a design with a damper. After the specified area is exceeded, the trolley can slowly push a few meters because of the damper, instead of suddenly completely locking it, so that it will not pose danger to the user and prevent it. The caster is forced to push the cart and damage the wheel.
  • the caster of the present invention uses a design with a damper. After the specified area is exceeded, the trolley can be slowly pushed a few meters due to the action of the damper, instead of being suddenly completely locked, so as not to cause a user. It also prevents the damage caused to the wheel body by forcibly pushing the trolley after the casters are locked. It can be widely used in shopping carts, luggage carts, baby carriages, turnover vehicles, stretcher carts and the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Handcart (AREA)

Description

说明书
Title of Invention:可制动的脚轮
技术领域
技术领域
[1] 本发明涉及一种脚轮, 尤其是一种带有制动机构的脚轮。
背景技术
背景技术
[2] 超市购物在当今社会越来越成为现代人生活必不可少的消费行为, 超市购物车 作为超市购物方便的运载工具, 在超市购物中起着重要的作用。 在利用超市购 物车装载完商品之后, 目前国内超市购物车的回收大都釆用靠超市工作人员回 收的方式, 浪费人力资源, 同吋, 人工成本越来越高, 不利于超市的成本控制 。 超市购物车被盗的情况也吋有发生。 由于每一辆购物车都是相当昂贵的, 所 以购物车的遗失对商家造成很大的经济损失。
[3] 基于超市购物车被盗情况, 同吋节约人力成本, 防盗购物车应运而生, 其基本 原理是: 通过购物车上的一个车轮在通过超市设置的防盗区域吋自动锁死, 使 整个购物车无法推动, 达到防盗目的。
[4] 由于此种方式在购物车通过防盗区域吋突然完全锁死, 可能造成购物车车轮的 损坏, 同吋可能造成对正在使用购物车的人员因为购物车的突然刹车造成危险 , 因此设计一款既能防盗又不会对使用者造成危险的购物车实为必要。
对发明的公开
技术问题
[5] 本发明的主要目的是提供一种既可防止突然锁死又可以起到防盗功能的可制动 脚轮。
技术解决方案
[6] 为实现上述目的, 本发明釆用了以下技术方案: 设计一种可制动的脚轮, 包括 轮架和可转动地支承于该轮架的轮体组件, 该轮架内设置有作用于该轮体组件 的制动机构; 所述制动机构包括具有信号接收部分的控制器、 受控地连接于该 控制器的锁定装置以及旋转式阻尼器, 该阻尼器包括具有限位结构的外壳和位 于该外壳内的阻尼轮, 所述外壳通过其限位结构与所述锁定装置分离或配合而 形成可旋转的自由状态或不可旋转的锁止状态, 所述阻尼轮传动连接于所述轮 体组件。
[7] 所述锁定装置包括驱动部分、 传动部分和执行部分。 所述驱动部分为电机; 所 述传动部分为减速齿轮组; 所述执行部分包括锁杆和作用于该锁杆的旋转头, 该旋转头连接于所述减速齿轮组, 该锁杆设有弹性回复部件。 所述旋转头优选 为凸轮, 所述弹性回复部件优选为扭簧。
[8] 所述阻尼轮可转动地设置在该外壳内, 该外壳与阻尼轮之间形成一密闭空腔, 阻尼油被密封在该密闭空腔内; 所述外壳与阻尼轮之间设有用于防止阻尼油泄 漏的密封件。
[9] 所述阻尼轮包括底壁、 中心部、 第一环状壁和第二环状壁, 第一环状壁与第二 环状壁之间形成有第一环形槽, 第二环状壁与中心部之间形成有第二环形槽; 所述外壳的内表面具有与第一环形槽形成间隙配合的第三环状壁以及与第二环 形槽形成间隙配合的的第四环状壁。 所述中心部具有可与一旋转轴形成周向固 定的贯通的腰形轴承孔。 由于阻尼轮与外壳之间设置有相互交错的环形槽和环 状壁, 环状壁与环形槽之间形成间隙配合, 这样, 在阻尼轮相对与外壳旋转的 过程中, 增大了阻尼轮与阻尼油的摩擦面积, 从而在不增加阻尼器体积或者阻 尼油粘度的前提下, 可实现增大阻尼值的目的。
[10] 所述阻尼轮的底壁上形成有若干个凹腔, 每个凹腔内设置有一个储油棉。 当阻 尼轮相对于外壳旋转吋, 外壳内部的阻尼油因摩擦生热而膨胀, 此吋储油棉可 吸收部分阻尼油, 以保持阻尼器内部压力和阻尼大小的恒定; 而当阻尼轮相对 于外壳静止吋, 阻尼油恢复至常温, 此吋储油棉释放部分阻尼油, 以保持阻尼 器内部压力和阻尼大小的恒定。
[11] 所述外壳包括通过螺丝相互密封连接的底座和盖子, 所述密封件设置在所述底 座与盖子之间、 所述阻尼轮的中心部与所述底座之间以及该中心部与所述盖子 之间。 所述底座设有连通所述密闭腔的第一注油口, 所述盖子设有连通所述密 闭腔的第二注油口, 所述第一注油口和第二注油口分别由第一封口件和第二封 口件所封闭。 所述外壳的周向侧面具有可与一锁定装置配合的限位结构。 所述 限位结构为沿所述周向侧面均匀间隔分布的若干个瓦形槽。
[12] 所述外壳和阻尼轮可以为圆柱形的金属件。
[13] 所述轮体组件包括轮胎本体、 轴承和第一齿轮, 所述轴承和第一齿轮同轴地连 接固定在所述轮胎本体上。 所述阻尼器的阻尼轮通过齿轮传动机构连接于所述 第一齿轮, 该齿轮传动机构包括相互平行的齿轮轴和阻尼轮轴, 该齿轮轴的一 端通过第二齿轮与所述第一齿轮啮合, 该齿轮轴另一端通过第三齿轮与所述阻 尼轮轴一端的第四齿轮啮合, 该阻尼轮轴与所述阻尼轮形成周向固定。
[14] 所述轮架包括一金属连接支架和一容纳所述控制器、 锁定装置及旋转式阻尼器 的塑料壳体。 所述轮体组件可以设置于所述塑料壳体的正中间或大致中间的位 置, 也可以设置于所述塑料壳体的一侧。
有益效果
[15] 与现有技术相比, 本发明具有以下优点和有益结果:
[16] 1 .该脚轮通过防盗区域后很难推动, 从而达到防盗的目的;
[17] 2 .解决了普通防盗手推车在防盗吋因脚轮突然锁死而对用户造成危险的问题;
[18] 3 .解决了普通防盗手推车在脚轮锁死吋继续推动而对轮体造成磨损的问题;
[19] 4.可广泛应用于购物车、 行李车、 婴儿车、 周转车、 担架车等手推车。
附图说明
[20] 图 1是本发明脚轮的一种优选实施方式的立体图;
[21] 图 2是图 1所示脚轮的零件分解图;
[22] 图 3是图 2中的轮体组件的零件分解图;
[23] 图 4是图 2中的阻尼器的正视图;
[24] 图 5是图 4的 A-A剖视图;
[25] 图 6是图 2中的阻尼器的零件分解图;
[26] 图 7是图 2中的阻尼器的另一视角的零件分解图;
[27] 图 8是图 1所示脚轮的正视图;
[28] 图 9是图 8的 B-B剖视图; [29] 图 10是图 8的 E-E剖视图;
[30] 图 11是图 10的 C-C剖视图;
[31] 图 12是图 1所示脚轮的解锁状态示意图一;
[32] 图 13是图 1所示脚轮的解锁状态示意图二;
[33] 图 14是图 1所示脚轮的锁定状态示意图。
本发明的实施方式
[34] 下面结合附图详细描述本发明。 在所有附图中, 相同的标记将被用来指代相同 的零部件、 特征或者结构。 实施例介绍过程中针对的具体结构或零部件仅做为 本领域技术人员理解本发明的参考性例证, 本领域技术人员在该技术方案的启 示下还可以设计出不超出本发明技术范围和实质的各种等同或类似技术构造, 由此如果用这种示例性说明来限制本发明权利要求所囊括的保护范围是不适宜 的, 等同或类似于本发明的技术方案仍然属于本发明权利要求的保护范围。 而 且出于简明的需要, 申请人省略了公知功能和结构的描述。
[35] 参见图 1至图 3, 该脚轮主要包括铁支架 21、 塑料壳体和轮体组件 11, 塑料壳体 由一主体 13和位于该主体 13两侧的可拆卸分离的控制器盖子 10和齿轮箱盖子 19 构成。 具有信号接收部分的控制器、 锁定装置 14和旋转式阻尼器 17安装在该主 体 13与控制器盖子 10之间的型腔内。 齿轮轴 12、 轴承 16、 第二齿轮 48、 第三齿 轮 45、 第四齿轮 15、 卡簧 18则位于主体 13与齿轮箱盖子 19之间的型腔内。 阻尼 轮轴 20依次穿过第四齿轮 15、 主体 13和阻尼器 17, 其两端分别支承在轴承 16和 轴承 25上。
[36] 参见图 3, 轮体组件 11通过未示出的轮轴安装在铁支架 21上, 轮体组件 11包括 轮胎本体 22、 轴承 23、 第一齿轮 24, 用螺丝将第一齿轮 24、 轴承 23与轮胎本体 22锁在一起。 这吋, 当轮胎本体 22转动吋, 第一齿轮 24也会跟着一起转动。
[37] 参见图 4至图 7, 阻尼器 17包括由盖子 31和底座 37构成的大致呈圆柱形的金属外 壳 4, 该外壳 4的圆周侧面上均匀间隔地分布有若干个瓦形限位槽 47, 用于跟一 锁定装置进行配合, 使外壳 4可以在周向上静止。 盖子 31通过若干个螺钉 30固定 连接于底座 37, 底座 37与盖子 31之间设有一个较大的 0型密封圏 34。 该底座 37上 具有一个第一注油口 2, 该盖子 31上具有一个第二注油口 3, 第一注油口 2和第二 注油口 3各由一个封口螺丝 32配合一个较小的 O型密封圏 33进行封闭。 由底座 37 和盖子 31构成的外壳 4内可转动地设置有一个大致呈圆柱形的金属阻尼轮 35。
[38] 阻尼轮 35包括底壁 354、 中心部 351、 第一环状壁 355和第二环状壁 356, 第一环 状壁 355与第二环状壁 356之间形成有第一环形槽 357, 第二环状壁 356与中心部 351之间形成有第二环形槽 358 ; 底座 37的内表面具有与第一环形槽 357形成间隙 配合的第三环状壁 371以及与第二环形槽 358形成间隙配合的的第四环状壁 372。 在该阻尼轮 35的中心部 351与底座 37之间以及该中心部 351与盖子 31之间分别设 有一个 0型密封圏 38。 外壳 4与阻尼轮 35之间形成一个密闭腔, 上述第一注油口 2 和第二注油口 3与该密闭腔相连通。 阻尼轮 35的中心部 351具有一个腰形的贯通 轴承孔 352, 该轴承孔 352可与控制对象的旋转轴形成周向固定。 四个圆柱形的 储油棉 39安置在阻尼轮 35的底壁 354上的四个圆形凹腔 353内, 当阻尼轮 35相对 于外壳 4旋转吋, 外壳 4内部的阻尼油因摩擦生热而膨胀, 此吋储油棉 39可吸收 部分阻尼油, 以保持阻尼器内部压力和阻尼大小的恒定, 而当阻尼轮 35相对于 外壳 4静止吋, 阻尼油恢复至常温, 此吋储油棉 39释放部分阻尼油, 以保持阻尼 器内部压力和阻尼大小的恒定。
[39] 该阻尼器 1的工作原理是: 将阻尼油 36经由第一注油口 2或第二注油口 3注入上 述密闭腔内, 在注油过程中, 另一个注油口用来排气, 使密闭腔内形成真空。 当完成注油后, 利用两个封口螺丝 32将上述两个注油口封闭, 确保阻尼油 36不 会漏出。 当利用一锁定装置与外壳 4的圆周侧面上分布的限位槽 47配合而限制外 壳 4转动, 同吋阻尼轮 35被穿过其轴承孔 352的旋转轴所带动吋, 阻尼轮 35相对 于外壳 4具有相对转动, 此吋密闭在密闭腔内的阻尼油 36在穿过各环形槽与各环 状壁的间隙流动吋, 对阻尼轮 35产生一个阻力, 阻碍阻尼轮 35相对于外壳 4的相 对转动, 从而降低阻尼轮 35的旋转速度。 如果要它们之间产生相对转动, 必须 要有足够的大的外力。
[40] 当上述脚轮安装于购物车进行使用吋, 当用户推动购物车, 轮胎本体 22与地 面摩擦而转动。 在图 9中, 由于第一齿轮 24与轮胎本体 22锁在一起, 导致第一齿 轮 24与轮胎本体 22—起转动, 从而通过第一齿轮 24与第二齿轮 48的啮合带动齿 轮轴 12转动。 在图 10中, 齿轮轴 12的腰形轴与第三齿轮 45的腰形孔配合, 齿轮 轴 12转动吋带动第三齿轮 45转动, 第三齿轮 45通过啮合带动第四齿轮 15转动。 在图 11中, 阻尼轮轴 20被三个轴承 16、 46和 25套住, 并将阻尼器 17—起装在由 主体 13和控制器盖子 10、 齿轮箱盖子 19组成的型腔内。 由于阻尼轮轴 20的腰形 轴与阻尼器 17的 35上的腰形贯通孔配合形成周向固定, 这样, 齿轮轴 12转动吋 带动第三齿轮 45转动, 第三齿轮 45带动第四齿轮 15转动, 第四齿轮 15带动阻尼 轮轴 20转动, 进而由阻尼轮 35带动整个阻尼器 17跟着一起转动。
[41] 参见图 12和图 13, 这是一种解锁状态下的情形, 即购物车处在商场允许的使 用范围内的脚轮状态, 此吋阻尼器 17没有任何的阻档, 用户可以自由、 灵活地 推动购物车。
[42] 当用户将购物车推到商场允许的使用范围边界线吋, 商场的保安系统会通过 射频等方式将锁定信号发送给控制器的信号接收部分, 当接收到上述信号吋, 控制器控制锁定装置 14内部的电机运动, 电机通过锁定装置 14内部的减速齿轮 组带动凸轮旋转头 41顺吋针转动 90度, 此吋电机停止转动。 由于锁杆 42被定位 在控制器盖子 10的锁杆轴 101上, 锁杆 42只能绕着控制器盖子 10上的锁杆轴 101 作圆周运动。 在扭簧 44的作用下, 锁杆 42以图 13中的逆吋针方向旋转, 直到被 旋转头 41顶住, 这吋, 锁杆 42的位置如图 14所示, 这就是一种锁定状态下的情 形。 在这种情形下, 当用户将购物车推动, 通过齿轮传动机构传动到阻尼器 17 吋, 阻尼器 17是按图 14中的逆吋针方向转动, 这吋, 锁杆 42刚好档住阻尼器 17 的外壳上的限位槽 47, 使该外壳无法转动, 此吋阻尼轮轴 20只能带动阻尼轮 35 作旋转运动, 阻尼轮 35旋转吋收到来自于阻尼油 36的阻力, 这种阻力通过齿轮 传动机构反作用于轮体组件 11, 以至于使用户在推动购物车吋要用很大的力才 能推动。
[43] 当商场的工作人员和用户用力将已经处于锁定状态下的购物车推至商场事先做 好的解锁线附近吋, 商场的保安系统通过射频等方式将解锁信号发送给控制器 的信号接收部分, 当接收到上述信号吋, 控制器控制锁定装置 14内部的电机运 动, 电机通过锁定装置 14内部的减速齿轮组带动凸轮旋转头 41顺吋针转动到使 锁杆 42位于旋转头 41凸轮面的最高点位置吋, 所述电机停止转动, 这吋已经处 于图 12、 13所示的解锁状态, 用户可以自由、 灵活地推动购物车在商场允许的 使用范围内走动。
[44] 综上所述, 上述结构的脚轮可以确保手推车只能在其允许的范围内使用, 若手 推车超出规定的使用区域, 脚轮的制动机构工作, 对手推车产生一个大的阻力 , 使用户很难继续推动手推车, 从而实现防盗的功能。 该脚轮釆用了带阻尼器 的设计, 在超出规定的区域后, 手推车因为阻尼器的作用还可以缓慢的推行几 米, 而不是突然地完全锁死, 从而不会对用户造成危险, 也防止了脚轮被锁死 后强行推动手推车而对轮体造成的损坏。
工业实用性
[45] 本发明的脚轮釆用了带阻尼器的设计, 在超出规定的区域后, 手推车因为阻尼 器的作用还可以缓慢的推行几米, 而不是突然地完全锁死, 从而不会对用户造 成危险, 也防止了脚轮被锁死后强行推动手推车而对轮体造成的损坏, 可广泛 应用于购物车、 行李车、 婴儿车、 周转车、 担架车等手推车。

Claims

权利要求书
一种可制动的脚轮, 包括轮架和可转动地支承于该轮架的轮体组 件, 该轮架内设置有作用于该轮体组件的制动机构; 所述制动机 构包括具有信号接收部分的控制器以及受控地连接于该控制器的 锁定装置; 其特征在于: 所述制动机构还包括旋转式阻尼器, 该阻尼器包括具有限位结构的外壳和位于该外壳内的阻尼轮, 所 述外壳通过其限位结构与所述锁定装置分离或配合而形成可旋转 的自由状态或不可旋转的锁止状态, 所述阻尼轮传动连接于所述 轮体组件。
根据权利要求 1所述的可制动的脚轮, 其特征在于: 所述锁定装置 包括驱动部分、 传动部分和执行部分。
根据权利要求 2所述的可制动的脚轮, 其特征在于: 所述驱动部分 为电机; 所述传动部分为减速齿轮组; 所述执行部分包括锁杆和 作用于锁杆的旋转头, 该旋转头连接于所述减速齿轮组, 该锁杆 设有弹性回复部件。
根据权利要求 3所述的可制动的脚轮, 其特征在于: 所述旋转头为 凸轮, 所述弹性回复部件为扭簧。
根据权利要求 1所述的可制动的脚轮, 其特征在于: 所述阻尼轮可 转动地设置在该外壳内, 该外壳与阻尼轮之间形成一密闭空腔, 阻尼油被密封在该密闭空腔内; 所述外壳与阻尼轮之间设有用于 防止阻尼油泄漏的密封件。
根据权利要求 5所述的可制动的脚轮, 其特征在于: 所述阻尼轮包 括底壁、 中心部、 第一环状壁和第二环状壁, 第一环状壁与第二 环状壁之间形成有第一环形槽, 第二环状壁与中心部之间形成有 第二环形槽; 所述外壳的内表面具有与第一环形槽形成间隙配合 的第三环状壁以及与第二环形槽形成间隙配合的的第四环状壁。 根据权利要求 6所述的可制动的脚轮, 其特征在于: 所述中心部具 有可与一旋转轴形成周向固定的轴承孔。 根据权利要求 7所述的可制动的脚轮, 其特征在于: 所述轴承孔为 贯通的腰形孔。
根据权利要求 6至 8任一项所述的可制动的脚轮, 其特征在于: 所 述底壁上形成有若干个凹腔, 每个凹腔内设置有一个储油棉。 根据权利要求 5至 8任一项所述的可制动的脚轮, 其特征在于: 所 述外壳包括通过螺丝相互密封连接的底座和盖子, 所述密封件设 置在所述底座与盖子之间、 所述阻尼轮的中心部与所述底座之间 以及该中心部与所述盖子之间。
根据权利要求 10所述的可制动的脚轮, 其特征在于: 所述底座设 有连通所述密闭腔的第一注油口, 所述盖子设有连通所述密闭腔 的第二注油口, 所述第一注油口和第二注油口分别由第一封口件 和第二封口件所封闭。
根据权利要求 11所述的可制动的脚轮, 其特征在于: 所述外壳的 周向侧面具有可与一锁定装置配合的限位结构。
根据权利要求 12所述的可制动的脚轮, 其特征在于: 所述限位结 构为沿所述周向侧面均匀间隔分布的若干个瓦形槽。
根据权利要求 5至 8任一项所述的可制动的脚轮, 其特征在于: 所 述外壳和阻尼轮均为金属件。
根据权利要求 5至 8任一项所述的可制动的脚轮, 其特征在于: 所 述外壳和阻尼轮均呈圆柱形。
根据权利要求 1所述的可制动的脚轮, 其特征在于: 所述轮体组件 包括轮胎本体、 轴承和第一齿轮, 所述轴承和第一齿轮同轴地连 接固定在所述轮胎本体上。
根据权利要求 16所述的可制动的脚轮, 其特征在于: 所述阻尼轮 通过齿轮传动机构连接于所述第一齿轮, 该齿轮传动机构包括相 互平行的齿轮轴和阻尼轮轴, 该齿轮轴的一端通过第二齿轮与所 述第一齿轮啮合, 该齿轮轴另一端通过第三齿轮与所述阻尼轮轴 一端的第四齿轮啮合, 该阻尼轮轴与所述阻尼轮形成周向固定。 [Claim 18] 根据权利要求 1所述的可制动的脚轮, 其特征在于: 所述轮架包括 一金属连接支架和一容纳所述控制器、 锁定装置及旋转式阻尼器 的塑料壳体。
[Claim 19] 根据权利要求 18所述的可制动的脚轮, 其特征在于: 所述轮体组 件设置于所述塑料壳体正中间或大致中间的位置。
[Claim 20] 根据权利要求 18所述的可制动的脚轮, 其特征在于: 所述轮体组 件设置于所述塑料壳体的一侧。
PCT/CN2009/074104 2008-09-30 2009-09-22 可制动的脚轮 WO2010037328A1 (zh)

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