WO2019034064A1 - 应用连杆锁紧机构的折叠手推车 - Google Patents

应用连杆锁紧机构的折叠手推车 Download PDF

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Publication number
WO2019034064A1
WO2019034064A1 PCT/CN2018/100550 CN2018100550W WO2019034064A1 WO 2019034064 A1 WO2019034064 A1 WO 2019034064A1 CN 2018100550 W CN2018100550 W CN 2018100550W WO 2019034064 A1 WO2019034064 A1 WO 2019034064A1
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Prior art keywords
link
rod
hinged
long
folding
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PCT/CN2018/100550
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English (en)
French (fr)
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李兰
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李兰
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Publication of WO2019034064A1 publication Critical patent/WO2019034064A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/02—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable

Definitions

  • the present invention relates to the field of mechanical locking mechanisms, and more particularly to a folding cart using a linkage locking mechanism.
  • the link mechanism has been applied to the folding cart, and the stability and operability requirements of the cart are also getting higher and higher.
  • the operation is simple and reliable, the demand for the trolley with small volume and convenient carrying is obvious.
  • folding carts There are many types of folding carts, the locking principle is different, the number of frame rods is different, and the connection positions between the rods are different, so that the locking manner and the folding manner are different.
  • the folding trolley generally has a large space occupied by folding, which is disadvantageous for carrying and storing, and the folding method is complicated, and some require the user to manually fold multiple times, and the operation mode is very cumbersome.
  • the present invention provides a folding cart with a full-link folding and unfolding, and a small space occupied by the folding of the link locking mechanism.
  • the present invention provides a folding cart using a link locking mechanism, including a folding frame and a wheel;
  • the folding frame comprises two sets of link locking mechanisms, and the connecting rod locking mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod and a sixth connecting unit a rod, a seventh link and an eighth link;
  • the third link comprises a connected third short bar and a third long bar
  • the fifth link comprises a fifth long bar and a fifth short bar connected thereto
  • the sixth link comprising a sixth a long rod and a sixth short rod disposed on the sixth long rod
  • One ends of the first link and the third long rod are connected to the wheel, the other end of the first link is hinged with the third short rod; and one end of the second link is connected with the first link
  • the rod body of the rod is hinged, the other end is hinged with the fifth link; the third short rod is hinged with one end of the fourth link; and the other end of the fourth link is hinged with the sixth link
  • One end of the fifth long rod is hinged to the rod of the third long rod, and the other end of the fifth long rod is hinged with the eighth link; one end of the sixth long rod is hinged to the first
  • the other end of the five-bar is hinged to the end of the seventh link; the other end of the seventh link is hinged to the rod of the eighth link;
  • the folding frame further includes two first brackets, two second brackets, a ninth link and a tenth link; the first bracket and the second bracket are respectively disposed on the first link and the third link The ninth link and the tenth link are respectively connected between the two first brackets and between the two second brackets.
  • a folding cart using a link locking mechanism including a folding frame and a wheel, is also proposed;
  • the folding frame comprises two sets of link locking mechanisms, and the connecting rod locking mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod and a sixth connecting unit a rod, a seventh link and an eighth link;
  • the third link comprises a connected third short bar and a third long bar
  • the fifth link comprises a fifth long bar and a fifth short bar connected thereto
  • the sixth link comprising a sixth a long rod and a sixth short rod disposed on the sixth long rod
  • the fourth link comprising a fourth long rod and a fourth long rod
  • One ends of the first link and the third long rod are connected to the wheel, the other end of the first link is hinged with the third short rod; and one end of the second link is connected with the first link
  • the rod body of the rod is hinged, the other end is hinged with the fifth link; the third short rod is hinged with one end of the fourth long rod; the fourth long rod is connected with the fourth short rod;
  • the other end of the fourth long rod is hinged with the sixth link, and the other end of the fourth short rod is hinged with the eighth link; one end of the fifth long rod and the fifth short rod are hinged to the On the rod body of the third long rod, the other end of the fifth long rod is hinged with one end of the sixth long rod, and the other end of the sixth long rod is hinged with one end of the seventh link;
  • the other end of the seven link is hinged to the rod of the eighth link;
  • the folding frame further includes two first brackets, two second brackets, a ninth link and a tenth link; the first bracket and the second bracket are respectively disposed on the first link and the third link The ninth link and the tenth link are respectively connected between the two first brackets and between the two second brackets.
  • the eleventh link is further included, and the eleventh link is disposed between the eighth links.
  • the hinge points of the first link and the fourth link and the third short bar do not coincide.
  • the first link and the fourth link coincide with the hinge point of the third short bar.
  • the first bracket, the ninth link and the first link are integrally formed or adopt a hinge structure.
  • the second bracket, the tenth link and the third link are integrally formed structures or adopt an articulated structure.
  • the other end of the second link is hinged with the fifth short rod.
  • the eighth link is a telescopic structure or a rotatable structure.
  • the angle between the hinge point of the first link and the third short rod and the front wheel axle center and the rear wheel axle center is 80 ° ⁇ 175 °.
  • the front wheel is located inside the rear wheel or outside the rear wheel after being folded once.
  • the locking is simple, and the vehicle locking can be completed by locking the hinge point on the side of the connecting rod locking mechanism.
  • Figure 1 is a perspective view of the link locking mechanism of the first embodiment
  • FIG. 2 is a schematic structural view of a folding cart using a link locking mechanism in Embodiment 1;
  • FIG. 3 is a schematic view showing the folding operation of the folding cart using the link locking mechanism in Embodiment 1;
  • FIG. 4 is a schematic view showing a half-folded state of a folding cart using a link locking mechanism in Embodiment 1;
  • FIG. 5 is a schematic view showing a folded state of a folding cart using a link locking mechanism in Embodiment 1;
  • FIG. 6 is a schematic view showing a state of secondary folding of a folding cart using a link locking mechanism in Embodiment 1;
  • Figure 7 is a skeleton view of the link locking mechanism of the second embodiment
  • Fig. 8 is a schematic view showing the mechanism of a folding cart in which the link locking mechanism is applied in the second embodiment.
  • the invention provides a folding trolley using a connecting rod locking mechanism, which comprises a folding frame and a wheel capable of being unfolded, folded once and twice folded, and can be locked by any hinge point on the side in the locking mechanism of the connecting rod.
  • the locking trolley of the connecting rod locking mechanism can be locked and has good stability.
  • the folding frame includes two sets of link locking mechanisms, and the link locking mechanism includes a first link 1, a second link 2, a third link 3, and a fourth link. 4.
  • the third link 3 includes a connected third short rod 31 and a third long rod 32
  • the fifth link 5 includes a fifth long rod 52 and a fifth short rod 51 connected thereto
  • the fifth short rod 51 and the fifth long rod 52 may be connected at a predetermined angle, or may be connected in an end-to-end manner and on the same straight line
  • the sixth link 6 includes a sixth long rod 62 and is disposed at the The sixth short rod 61 on the six long rods 6.
  • the wheel includes a front wheel 14 and a rear wheel 15.
  • the other end of the first link 1 is hinged to the third short rod 31 at point B; one end of the second link 2 is hinged to the rod of the first link 1 at point A.
  • the other end is hinged to the fifth link 5, preferably, the other end of the second link 2 is hinged to the point D at the other end of the second link 2, in an embodiment other than the embodiment,
  • the second link 2 can also be hinged to the fifth long rod 52; the third short rod 31 and one end of the fourth link 4 are hinged at point C; the other end of the fourth link 4 is The sixth link 6 is hinged.
  • the other end of the fourth link 4 is hinged to the F point at the sixth short rod 61; one end of the fifth long rod 52 is hinged to the third long rod 3.
  • the hinge point is point E
  • the other end of the fifth long rod 52 is hinged to the point I at the point I
  • one end of the sixth rod 6 is hinged to the fifth rod 5
  • the H point on the rod body is hinged to the G point at one end of the seventh link 7 at the other end; the other end of the seventh link 7 is hinged to the J point on the rod body of the eighth link 8.
  • the folding frame further includes two first brackets 12, two second brackets 33, a ninth link 9 and a tenth link 10; the first bracket 12 and the first Two brackets 33 are respectively disposed on the first link 1 and the third link 3.
  • the ninth link 9 and the tenth link 10 are connected between the two first brackets 12 and the two second brackets 33, respectively.
  • the ninth link 9, the first bracket 12 and the first link 1 may be an integrally formed structure, and the three may also adopt an articulated structure.
  • the tenth link 10, the second bracket 33 and the third link 3 may be an integrally formed structure, and the three may also adopt an articulated structure.
  • the folding cart using the link locking mechanism further includes an eleventh link 11 , and the eleventh link 11 is disposed between the eighth links 8 , the tenth A link 11 can be used as a push rod for the cart.
  • the eighth link 8 can be an integrally formed or telescopic structure or a rotatable structure, which can further reduce the folded volume.
  • the hinge points B and C of the first link 1 and the fourth link 5 and the third short rod 31 do not coincide.
  • point B and point C may coincide.
  • the point F of the fourth link 4 and the sixth short rod 61 may not coincide with the point G of the sixth long rod 6 and the seventh link 7 hinged.
  • the F point and the G point may also coincide.
  • an angle formed between the hinge point B of the first link and the third short rod and the axis of the front wheel 14 and the rear wheel 15 ranges from 80° to 175°, for example, 80°, 90°, 110 °, 120° or 160°.
  • the front wheel 14 in a folded state, is located inside the rear wheel 15, and in other embodiments than the embodiment, the front wheel 14 may also be located outside the rear wheel 15, in this case,
  • the two-side link locking mechanism group and the front wheel 14 and the rear wheel 15 are rotated in opposite directions, so that the opposite direction is rotated at a certain angle and folded in the direction of the arrow, thereby completing the second folding.
  • the cart takes up a small volume after the second folding, and is convenient to carry and place.
  • the connecting mechanism of the connecting rod locking mechanism is different, the specific difference is that the fourth connecting rod 4 includes The fourth long rod 42 is connected to the fourth short rod 41, and the fourth long rod 42 is connected to the fourth short rod 41.
  • the fourth long rod 42 and the fourth short rod 41 are integrally formed; The other end of the long rod 42 is hinged to the sixth link 6, the fourth short rod 41 is hinged to the eight link 8, and the eighth link 8 is no longer connected to the fifth link 5.
  • the folding frame also includes two sets of link locking mechanisms, and the link locking mechanism includes a first link 1 , a second link 2 , and a third link 3 .
  • the first link 1, the second link 2, the third link 3, the fifth link 5, the sixth link 6, and the seventh link 7 are the same as the link in the embodiment 1, where
  • the fourth link 4 includes a fourth long rod 42 and a fourth short rod 41 connected to the fourth long rod 42, the fourth link 4 and the sixth link 6 and the eighth link
  • the connection of the rod 8 is also different from that in the first embodiment.
  • first link 1 and the third long rod 3 are connected to the wheel.
  • the other end of the first link 1 is hinged to the third short rod 31 at point B1;
  • one end of the second link 2 is hinged to the rod of the first link 1 at point A1, and the other end is
  • the fifth link 5 is hinged.
  • the fifth short rod 51 of the other end of the second link 2 is hinged to the point D1.
  • the second link 2 is further It may be hinged to the fifth long rod 52; one end of the third short rod 31 and the fourth long rod 42 is hinged to the point C1; the other end of the fourth long rod 42 and the sixth short rod 61 Hinged to point F1, the other end of the fourth short rod 41 is hinged to the H1 point of the eighth long rod 8; one end of the fifth long rod 52 and the fifth short rod 51 are hinged to the third length An E1 point on the rod of the rod 3, the other end of the fifth long rod 52 and one end of the sixth long rod 62 are hinged to the K1 point, and the other end of the sixth long rod 62 and the seventh link 7 One end of the seventh link 7 is hinged to the point G1; the other end of the seventh link 7 is hinged to the point J1 on the rod of the eighth link 8.
  • the folding frame further includes two first brackets 12, two second brackets 33, a ninth link 9 and a tenth link 10; the eighth link 8 may be integrally formed.
  • the telescopic structure when it is a telescopic structure, the volume can be further reduced; the wheel includes the front wheel and the rear wheel, and the above features are the same as those in the first embodiment. I will not repeat them here.
  • the operation process of the folding trolley using the link locking mechanism is similar to the operation process in the first embodiment.
  • the operation process of the folding trolley using the link locking mechanism is similar to the operation process in the first embodiment.
  • the folding trolley using the link locking mechanism proposed in this embodiment has the following advantages:
  • the locking is simple, and the vehicle locking can be completed by locking the hinge point on the side of the connecting rod locking mechanism.

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

Abstract

一种应用连杆锁紧机构的折叠手推车，包括能够展开、一次折叠和二次折叠的折叠车架和车轮，折叠车架由两组连杆锁紧机构组成。通过应用连杆锁紧机构，在展开状态时，当锁紧连杆锁紧机构上的侧边任一铰接点时，即可形成一组稳定的且桁架结构。车架解锁后，借助外力作用，便可全联动的快速实现一次折叠和展开，且一次折叠后还可进行二次折叠。

Description

应用连杆锁紧机构的折叠手推车 技术领域
本发明涉及机械锁紧机构领域，尤其涉及应用连杆锁紧机构的折叠手推车。
背景技术
目前，连杆机构已经应用到折叠式手推车中，对手推车的稳定性和操作性要求也越来越高。对于操作简单可靠，折叠后体积小、携带方便的手推车需求明显。现有的折叠式推车种类很多，锁紧原理不同，车架杆件的数目不同，各杆件之间的连接位置不同，从而锁紧方式及折叠方式各不相同。
然而，在现有技术中折叠式手推车普遍存在折叠后所占空间较大，不利于进行携带和存储，并且折叠方式复杂，有些需要使用者手动进行多次折叠，操作方式十分繁琐。
发明内容
为解决现有技术中的不足，本发明提供了全联动折叠和展开、折叠后占用空间小的应用连杆锁紧机构的折叠手推车。
本发明的具体方案如下：
本发明提供了一种应用连杆锁紧机构的折叠手推车，包括折叠车架和车轮；
所述折叠车架包括两组连杆锁紧机构，所述连杆锁紧机构包括第一连杆、第二连杆、第三连杆、第四连杆、第五连杆、第六连杆、第七连杆和第八连杆；
其中，所述第三连杆包括相连的第三短杆和第三长杆，所述第五连杆包括第五长杆和与其相连的第五短杆，所述第六连杆包括第六长杆和设置在第六长 杆上的第六短杆；
所述第一连杆和第三长杆的一端均与所述车轮相连，所述第一连杆的另一端与所述第三短杆铰接；所述第二连杆的一端与第一连杆的杆体铰接，另一端与所述第五连杆铰接；所述第三短杆与所述第四连杆的一端铰接；所述第四连杆的另一端与所述第六连杆铰接；所述第五长杆的一端铰接于所述第三长杆的杆体上，所述第五长杆的另一端与第八连杆铰接；所述第六长杆的一端铰接于所述第五长杆的杆体上，另一端与所述第七连杆的一端铰接；所述第七连杆的另一端铰接于所述第八连杆的杆体上；
所述折叠车架还包括两个第一支架、两个第二支架、第九连杆和第十连杆；所述第一支架和第二支架分别设置在所述第一连杆和第三连杆上；所述第九连杆和第十连杆分别连接在两个第一支架之间和两个第二支架之间。
在本发明中还提出了一种应用连杆锁紧机构的折叠手推车，包括折叠车架和车轮；
所述折叠车架包括两组连杆锁紧机构，所述连杆锁紧机构包括第一连杆、第二连杆、第三连杆、第四连杆、第五连杆、第六连杆、第七连杆和第八连杆；
其中，所述第三连杆包括相连的第三短杆和第三长杆，所述第五连杆包括第五长杆和与其相连的第五短杆，所述第六连杆包括第六长杆和设置在第六长杆上的第六短杆，所述第四连杆包括第四长杆和与第四长杆；
所述第一连杆和第三长杆的一端均与所述车轮相连，所述第一连杆的另一端与所述第三短杆铰接；所述第二连杆的一端与第一连杆的杆体铰接，另一端与所述第五连杆铰接；所述第三短杆与所述第四长杆的一端铰接；所述第四长杆和所述第四短杆相连；所述第四长杆的另一端与所述第六连杆铰接，所述第四短杆的另一端与所述第八连杆铰接；所述第五长杆的一端和第五短杆铰接于 所述第三长杆的杆体上，所述第五长杆的另一端与第六长杆的一端铰接，所述第六长杆的另一端与所述第七连杆的一端铰接；所述第七连杆的另一端铰接于所述第八连杆的杆体上；
所述折叠车架还包括两个第一支架、两个第二支架、第九连杆和第十连杆；所述第一支架和第二支架分别设置在所述第一连杆和第三连杆上；所述第九连杆和第十连杆分别连接在两个第一支架之间和两个第二支架之间。
优选的，在所述的应用连杆锁紧机构的折叠手推车中，还包括第十一连杆，所述第十一连杆设置在所述第八连杆之间。
优选的，在所述的应用连杆锁紧机构的折叠手推车中，所述第一连杆和第四连杆与第三短杆的铰接点不重合。
优选的，在所述的应用连杆锁紧机构的折叠手推车中，所述第一连杆和第四连杆与第三短杆的铰接点重合。
优选的，在所述的应用连杆锁紧机构的折叠手推车中，所述第一支架、第九连杆和第一连杆为一体成型结构或采用铰接结构。
优选的，在所述的应用连杆锁紧机构的折叠手推车中，所述第二支架、第十连杆和第三连杆为一体成型结构或采用铰接结构。
优选的，在所述的应用连杆锁紧机构的折叠手推车中，所述第二连杆的另一端与所述第五短杆铰接。
优选的，在所述的应用连杆锁紧机构的折叠手推车中，所述第八连杆为可伸缩结构或可旋转结构。
优选的，在所述的应用连杆锁紧机构的折叠手推车中，所述第一连杆与第三短杆的铰接点与前车轮轴心和后车轮轴心之间形成的夹角范围为80°～175°。
优选的，在所述的应用连杆锁紧机构的折叠手推车中，一次折叠后，所述前车轮位于后车轮内侧或位于后车轮外侧。
综上，与现有技术相比，本发明的有益效果主要体现在：
(1)一次折叠和打开全联动，只需要一个动作，操作简单。
(2)在一次折叠基础上还可以进行二次折叠，使得折叠后体积更小。
(3)折叠后体积较小，便于包装和携带。
(4)锁定简单，通过锁定连杆锁紧机构侧面的铰接点可完成整车锁定。
(5)任两个连杆相锁定，整车即呈稳定状态，安全性高。
附图说明
图1为实施例1中连杆锁紧机构的框架图；
图2为实施例1中应用连杆锁紧机构的折叠手推车的结构示意图；
图3为实施例1中应用连杆锁紧机构的折叠手推车的折叠动作示意图；
图4为实施例1中应用连杆锁紧机构的折叠手推车的半折叠状态示意图；
图5为实施例1中应用连杆锁紧机构的折叠手推车的一次折叠状态示意图；
图6为实施例1中应用连杆锁紧机构的折叠手推车的二次折叠状态示意图；
图7为实施例2中连杆锁紧机构的框架图；
图8为实施例2中应用连杆锁紧机构的折叠手推车的机构示意图。
其中：
1、第一连杆，2、第二连杆，3、第三连杆，4、第四连杆，5、第五连杆，6、第六连杆，7、第七连杆，8、第八连杆，9、第九连杆，10、第十连杆，11、第十一连杆，14、前车轮，15、后车轮，12、第一支架，31、第三短杆，32、第三长杆，33、第二支架，51、第五短杆，52、第五长杆，61、第六短杆，62、 第六长杆，41、第四短杆，42、第四长杆。
具体实施方式
下面结合附图和以下实施例对本发明作进一步详细说明。
实施例1
本发明提出了一种应用连杆锁紧机构的折叠手推车，包括能够展开、一次折叠和二次折叠的折叠车架和车轮，可通过锁紧连杆锁紧机构中的侧面任一铰接点，即可实现应用连杆锁紧机构的折叠手推车的锁紧，具有较好的稳定性。
如图1所示，所述折叠车架包括两组连杆锁紧机构，所述连杆锁紧机构包括第一连杆1、第二连杆2、第三连杆3、第四连杆4、第五连杆5、第六连杆6、第七连杆7和第八连杆8。
其中，所述第三连杆3包括相连的第三短杆31和第三长杆32，所述第五连杆5包括第五长杆52和与其相连的第五短杆51；所述第五短杆51和第五长杆52可以呈预定夹角的连接方式，也可以为首尾相连且位于同一直线上的连接方式；所述第六连杆6包括第六长杆62和设置在第六长杆6上的第六短杆61。
如图2所示，所述第一连杆1和第三长杆3的一端均与所述车轮相连，具体的，所述车轮包括前车轮14和后车轮15。
在本实施例中，所述第一连杆1的另一端与所述第三短杆31铰接于B点；所述第二连杆2的一端与第一连杆1的杆体铰接于A点，另一端与所述第五连杆5铰接，优选的，所述第二连杆2的另一端所述第五短杆51铰接于D点，在本实施例以外的实施例中，所述第二连杆2还可以铰接于第五长杆52上；所述第三短杆31与所述第四连杆4的一端铰接于C点；所述第四连杆4的另一端与所述第六连杆6铰接，优选的，所述第四连杆4的另一端与第六短杆61铰接于 F点；所述第五长杆52的一端铰接于所述第三长杆3的杆体上，铰接点为E点，所述第五长杆52的另一端与第八连杆8铰接于I点；所述第六长杆6的一端铰接于所述第五长杆5的杆体上H点，另一端与所述第七连杆7的一端铰接于G点；所述第七连杆7的另一端铰接于所述第八连杆8的杆体上的J点。
请结合参考图1和图2，所述折叠车架还包括两个第一支架12、两个第二支架33、第九连杆9和第十连杆10；所述第一支架12和第二支架33分别设置在所述第一连杆1和第三连杆3上。所述第九连杆9和第十连杆10分别连接在两个第一支架12之间和两个第二支架33之间。其中，所述第九连杆9、第一支架12和第一连杆1三者可以为一体成型结构，三者也可以采用铰接结构。所述第十连杆10、第二支架33和第三连杆3三者可以为一体成型结构，三者也可以采用铰接结构。
在本实施例中，所述应用连杆锁紧机构的折叠手推车还包括第十一连杆11，所述第十一连杆11设置在所述第八连杆8之间，所述第十一连杆11可用作推车的推杆。其中，所述第八连杆8可以为一体成型或者可伸缩结构或可旋转结构，可进一步缩小折叠后的体积。
在本实施例中，所述第一连杆1和第四连杆5与第三短杆31的铰接点B点和C点不重合。本领域技术人员可以知晓的是，在本实施例以外的其他实施例中，B点和C点可以重合。在本实施例中，所述第四连杆4与第六短杆61铰接的F点可以与所述第六长杆6与所述第七连杆7铰接的G点不重合。同样的，在本实施例以外的其他实施例中，F点和G点还可以相重合。
此外，所述第一连杆与第三短杆的铰接点B与前车轮14和后车轮15轴心之间形成的夹角范围为80°～175°，例如是80°、90°、110°、120°或160°。
如图3所示，当需要进行一次折叠时，施加外力，使所述前车轮14如图中 箭头所示沿逆时针方向运动，同时相应的连杆沿顺时针方向运动，完成半折叠，折叠后如图4所示。
如图5所示，在一次折叠状态下，所述前车轮14位于后车轮15内侧，在本实施例以外的其他实施例中，前车轮14也可以位于后车轮15的外侧，此时，可通过外力，使得两边连杆锁紧机构组和所述前车轮14和后车轮15对向旋转，使对向旋转一定角度，沿着箭头方向进行对折，从而完成二次折叠。折叠后如图6所示，在二次折叠后推车所占的体积较小，方便携带和放置。
实施例2
在本实施例中，还提出了另一种应用连杆锁紧机构的折叠手推车，与实施例1相比，连杆锁紧机构的连接方式不同，具体的区别在于，第四连杆4包括第四长杆42与第四短杆41，第四长杆42与第四短杆41连接，其中，优选的，所述第四长杆42与第四短杆41为一体成型结构；第四长杆42的另一端与第六连杆6铰接，第四短杆41与八连杆8铰接，第八连杆8不再与第五连杆5相连。
如图7和图8所示，所述折叠车架也包括两组连杆锁紧机构，所述连杆锁紧机构包括第一连杆1、第二连杆2、第三连杆3、第四连杆4、第五连杆5、第六连杆6、第七连杆7和第八连杆8。其中，第一连杆1、第二连杆2、第三连杆3、第五连杆5、第六连杆6和第七连杆7均与实施例1中的连杆相同，在此不做赘述，具体的可以参考实施例1。但在本实施例中，所述第四连杆4包括第四长杆42和与第四长杆42相连的第四短杆41，第四连杆4与第六连杆6和第八连杆8的连接方式也与是实施例1中不同。
具体的，所述第一连杆1和第三长杆3的一端均与所述车轮相连。所述第一连杆1的另一端与所述第三短杆31铰接于B1点；所述第二连杆2的一端与 第一连杆1的杆体铰接于A1点，另一端与所述第五连杆5铰接，优选的，所述第二连杆2的另一端所述第五短杆51铰接于D1点，在本实施例以外的实施例中，所述第二连杆2还可以铰接于第五长杆52上；所述第三短杆31与所述第四长杆42的一端铰接于C1点；所述第四长杆42的另一端与所述第六短杆61铰接于F1点，所述第四短杆41的另一端与所述第八长杆8铰接于H1点；所述第五长杆52的一端和第五短杆51铰接于所述第三长杆3的杆体上的E1点，所述第五长杆52的另一端与第六长杆62的一端铰接于K1点，所述第六长杆62的另一端与所述第七连杆7的一端铰接于G1点；所述第七连杆7的另一端铰接于所述第八连杆8的杆体上的J1点。
在本实施例中，所述折叠车架还包括两个第一支架12、两个第二支架33、第九连杆9和第十连杆10；所述第八连杆8可以为一体成型或者可伸缩结构，当其为可伸缩结构时，可进一步缩小折叠后的体积；所述车轮包括前车轮和后车轮，上述特征均与实施例1中的相同，具体可以参考是实施例1，在此不做赘述。
此外，所述应用连杆锁紧机构的折叠手推车，其动作过程与实施例1中的动作过程相似，具体可以参考实施例1，在此不做赘述。
综上所述，本实施例提出的应用连杆锁紧机构的折叠手推车，具有以下优点：
(1)一次折叠和打开全联动，只需要一个动作，操作简单。
(2)在一次折叠基础上还可以进行二次折叠，使得折叠后体积更小。
(3)折叠后体积较小，便于包装和携带。
(4)锁定简单，通过锁定连杆锁紧机构侧面的铰接点可完成整车锁定。
(5)任两个连杆相锁定，整车即呈稳定状态，安全性高。
上述仅为本发明的优选实施例而已，并不对本发明起到任何限制作用。任何所属技术领域的技术人员，在不脱离本发明的技术方案的范围内，对本发明揭露的技术方案和技术内容做任何形式的等同替换或修改等变动，均属未脱离本发明的技术方案的内容，仍属于本发明的保护范围之内。

Claims (11)

  1. 一种应用连杆锁紧机构的折叠手推车，其特征在于，包括折叠车架和车轮；
    所述折叠车架包括两组连杆锁紧机构，所述连杆锁紧机构包括第一连杆、第二连杆、第三连杆、第四连杆、第五连杆、第六连杆、第七连杆和第八连杆；
    其中，所述第三连杆包括相连的第三短杆和第三长杆，所述第五连杆包括第五长杆和与其相连的第五短杆，所述第六连杆包括第六长杆和设置在第六长杆上的第六短杆；
    所述第一连杆和第三长杆的一端均与所述车轮相连，所述第一连杆的另一端与所述第三短杆铰接；所述第二连杆的一端与第一连杆的杆体铰接，另一端与所述第五连杆铰接；所述第三短杆与所述第四连杆的一端铰接；所述第四连杆的另一端与所述第六连杆铰接；所述第五长杆的一端铰接于所述第三长杆的杆体上，所述第五长杆的另一端与第八连杆铰接；所述第六长杆的一端铰接于所述第五长杆的杆体上，另一端与所述第七连杆的一端铰接；所述第七连杆的另一端铰接于所述第八连杆的杆体上；
    所述折叠车架还包括两个第一支架、两个第二支架、第九连杆和第十连杆；所述第一支架和第二支架分别设置在所述第一连杆和第三连杆上；所述第九连杆和第十连杆分别连接在两个第一支架之间和两个第二支架之间。
  2. 一种应用连杆锁紧机构的折叠手推车，其特征在于，包括折叠车架和车轮；
    所述折叠车架包括两组连杆锁紧机构，所述连杆锁紧机构包括第一连杆、第二连杆、第三连杆、第四连杆、第五连杆、第六连杆、第七连杆和第八连杆；
    其中，所述第三连杆包括相连的第三短杆和第三长杆，所述第五连杆包括第五长杆和与其相连的第五短杆，所述第六连杆包括第六长杆和设置在第六长 杆上的第六短杆，所述第四连杆包括第四长杆和与第四长杆；
    所述第一连杆和第三长杆的一端均与所述车轮相连，所述第一连杆的另一端与所述第三短杆铰接；所述第二连杆的一端与第一连杆的杆体铰接，另一端与所述第五连杆铰接；所述第三短杆与所述第四长杆的一端铰接；所述第四长杆和所述第四短杆相连；所述第四长杆的另一端与所述第六连杆铰接，所述第四短杆的另一端与所述第八连杆铰接；所述第五长杆的一端和第五短杆铰接于所述第三长杆的杆体上，所述第五长杆的另一端与第六长杆的一端铰接，所述第六长杆的另一端与所述第七连杆的一端铰接；所述第七连杆的另一端铰接于所述第八连杆的杆体上；
    所述折叠车架还包括两个第一支架、两个第二支架、第九连杆和第十连杆；所述第一支架和第二支架分别设置在所述第一连杆和第三连杆上；所述第九连杆和第十连杆分别连接在两个第一支架之间和两个第二支架之间。
  3. 根据权利要求1或2所述的应用连杆锁紧机构的折叠手推车，其特征在于，还包括第十一连杆，所述第十一连杆设置在所述第八连杆之间。
  4. 根据权利要求1或2所述的应用连杆锁紧机构的折叠手推车，其特征在于，所述第一连杆和第四连杆与第三短杆的铰接点不重合。
  5. 根据权利要求1或2所述的应用连杆锁紧机构的折叠手推车，其特征在于，所述第一连杆和第四连杆与第三短杆的铰接点重合。
  6. 根据权利要求1或2所述的应用连杆锁紧机构的折叠手推车，其特征在于，所述第一支架、第九连杆和第一连杆为一体成型结构或采用铰接结构。
  7. 根据权利要求1或2所述的应用连杆锁紧机构的折叠手推车，其特征在于，所述第二支架、第十连杆和第三连杆为一体成型结构或采用铰接结构。
  8. 根据权利要求1或2所述的应用连杆锁紧机构的折叠手推车，其特征在 于，所述第二连杆的另一端与所述第五短杆铰接。
  9. 根据权利要求1或2所述的应用连杆锁紧机构的折叠手推车，其特征在于，所述第八连杆为可伸缩结构或可旋转结构。
  10. 根据权利要求1或2所述的应用连杆锁紧机构的折叠手推车，其特征在于，所述第一连杆与第三短杆的铰接点与前车轮轴心和后车轮轴心之间形成的夹角范围为80°～175°。
  11. 根据权利要求1或2所述的应用连杆锁紧机构的折叠手推车，其特征在于，一次折叠后，所述前车轮位于后车轮内侧或位于后车轮外侧。
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