WO2018121713A1 - 具有平衡装置的折叠箱 - Google Patents

具有平衡装置的折叠箱 Download PDF

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Publication number
WO2018121713A1
WO2018121713A1 PCT/CN2017/119717 CN2017119717W WO2018121713A1 WO 2018121713 A1 WO2018121713 A1 WO 2018121713A1 CN 2017119717 W CN2017119717 W CN 2017119717W WO 2018121713 A1 WO2018121713 A1 WO 2018121713A1
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WIPO (PCT)
Prior art keywords
balance spring
end frame
folding box
pull arm
balance
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PCT/CN2017/119717
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English (en)
French (fr)
Inventor
伍国权
赵建刚
董文言
李赛方
张前先
Original Assignee
广东新会中集特种运输设备有限公司
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Application filed by 广东新会中集特种运输设备有限公司 filed Critical 广东新会中集特种运输设备有限公司
Publication of WO2018121713A1 publication Critical patent/WO2018121713A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/52—Large containers collapsible, i.e. with walls hinged together or detachably connected
    • B65D88/522—Large containers collapsible, i.e. with walls hinged together or detachably connected all side walls hingedly connected to each other or to another component of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/52—Large containers collapsible, i.e. with walls hinged together or detachably connected

Definitions

  • the present invention relates to the field of machinery, and more particularly to a folding box having a balancing device.
  • the adjustable height folding box of the prior art comprises a folding box end frame 1, a folding box outer corner post 11, a folding box inner corner post 12, an inner corner post lock block 13, a folding box bottom frame 2 and a rotating shaft 3.
  • the folding box end frame 1 is hinged to the folding box bottom frame 2 through the rotating shaft 3, and the corner column 12 in the folding box is locked and unlocked in the outer corner column 11 of the folding box by the inner corner column locking block 13, and the inner corner column locking block 13 is unlocked, and the inner corner post 12 is closed.
  • the height of the folding box can be adjusted, the folding box end frame 1 is in the upright state, and the corner post 12 in the folding box is at the lowest position.
  • the end frame support 21 is a retractable structure, which is illustrated as a retracted working state.
  • the end frame support 21 can be extended as a support point for the folding box end frame 1 to be stopped at a certain position.
  • the angle of inclination is used for convenient replacement or adjustment of the length and contraction of the corner post 12 in the folding box.
  • the bottom frame 2 of the folding box is provided with a bottom frame notch 22, and is designed to be able to be nested flatly on the folding box bottom frame after the folding box end frame 1 is fallen down.
  • the size of the underframe notch 22 has a certain relationship with the strength of the folding box chassis and the loading space. In order to achieve optimization, the size of the chassis notch 22 is at the lowest position of the corner post 12 in the folding box in the folding box end frame 1. Designed at the time.
  • the corner post 12 of the folding box can be at the highest position, and the end frame support 21 is in an extended state.
  • the end frame support 21 is in an extended working state, and the folding box end frame 1 is supported on the end frame support 21, and the folding box end frame 1 forms a small angle with the horizontal plane.
  • the adjustment of the telescopic column 12 in the folding box can be easily performed.
  • the end frame support 21 can be in a retracted state, in which the corner post 12 of the folding box is at the lowest position, and the folding box end frame 1 can be completely fallen down into the underframe notch 22 embedded in the folding box chassis 2. .
  • a gantry type container is disclosed in US Pat. No. 6,227,397 B1, which includes a collapsible end frame including a fixed outer corner post and a telescopically adjustable inner corner post, and means for securing and reinforcing the inner corner post thereof due to The inner corner post can be adjusted telescopically, and the height of the container can be changed differently to adapt to the loading requirements of different height goods. Due to the telescopic adjustment of the inner corner post, the position of the center of gravity of the foldable end frame will also change correspondingly.
  • this type of gantry container will be provided with a balancing device, and the balancing device is generally a leaf spring or a tension spring, with the aid of the balancing device, the foldable end frame Folding or erecting can be easily performed manually.
  • the disclosed collapsible end frame with adjustable height inner corner post changes due to the adjustment of the inner corner post, and the foldable end frame falls or
  • the gravity moment curve during the erection process will be different according to the adjustment of the inner corner column, but the balance torque generated by the balance is fixed, and only the gravity moment generated by the height of the center of gravity corresponding to one of the inner corner columns
  • the curve is well balanced, and the balance aid of the gravity moment curve corresponding to the change in the height of the center of gravity generated by the height of the remaining inner corner column can only be supplemented by artificial force.
  • the balance device design reference is taken as the reference to the gravity moment curve generated by the center of gravity of the end frame when the inner corner column is in the middle of the adjustable range, that is, when When the inner corner column is in the middle of the adjustable range, the gravity moment curve is equal to the balance auxiliary curve, and the best balance effect can be achieved.
  • the gravity moment curve is larger than the balance auxiliary curve, and the gravity moment is dominant.
  • the end frame can freely fall, and it needs manual assistance when erecting.
  • the gravity torque curve is smaller than the balance auxiliary curve, the balance auxiliary torque is dominant, and the end frame needs manual assistance to fall, and can be lowered when erecting Free to erect.
  • the bottom frame is horizontally leveled, and the bottom frame is provided with a notch to avoid the inner and outer corner posts.
  • the size of the notch affects the strength of the bottom frame, in order to minimize the strength of the chassis. Loss, the inner corner post is at the lowest position of the adjustable range when the end frame is leveled, and the end frame occupies the smallest chassis gap.
  • the height adjustment position is set at an angle between the end frame and the horizontal plane to facilitate manual adjustment.
  • the height-adjustable position is provided with a retractable end frame support.
  • a folding box having a balancing device including a chassis and an end frame disposed at both ends of the chassis, and a chassis disposed on the chassis a hinge device between the end frames, the hinge device comprising a fixed hinge, a living hinge, and a rotating shaft disposed between the fixed hinge and the living hinge, the fixed hinge being fixedly connected with the bottom frame
  • the living hinge is fixedly connected to the end frame
  • the folding box further comprises a balancing device
  • the balancing device comprises:
  • balance spring pull arm connected to a portion of the living hinge adjacent to the rotating shaft, the balance spring pull arm being provided with a balance spring pull arm hole;
  • balance spring the first end of the balance spring is connected to the balance spring mount, and the second end of the balance spring is connected to the balance spring pull arm through the balance spring pull arm hole;
  • the balance spring pull arm hole has a first position and a second position, wherein the balance spring is coupled to the first position of the balance spring pull arm hole when the end frame is in a vertical position;
  • the side of the chassis is further provided with an end frame support, and when the end frame is folded onto the end frame support, the balance spring is connected to the second position of the balance pull arm hole, when the end frame is The balance spring moves from the first position of the balance spring pull arm hole to the second position when the vertical position is folded toward the end frame.
  • the balance spring pull arm hole is an elongated hole, a V-shaped hole or an arc-shaped hole.
  • the balance spring is a tension or compression spring.
  • the balance spring comprises a spring and a connecting plate, the first end of the spring is connected with the balance spring fixing seat, and the second end of the spring is connected with one end of the connecting plate, the connecting plate The other end is connected to the balance spring pull arm through the balance spring pull arm hole.
  • the end frame includes a corner post disposed on both sides thereof, the corner post including an inner corner post and an outer corner post, the inner corner post being slidable within the outer corner post.
  • the folding box with the balancing device comprises a balance spring fixing seat, a balance spring pulling arm and a balance spring, and the balance spring pulling arm can drive the balance spring to stretch or compress when the folding box end frame is fallen down or folded.
  • the reaction force generated by the balance spring can be applied to the end frame by the balance spring pull arm to generate a balance assisting torque, which is offset by the gravity moment of the end frame to achieve the balance of the end frame of the folding box.
  • FIG. 1 is a perspective view of an erected state of an adjustable height folding box in the prior art, wherein the corner post in the folding box is at a lowest position;
  • Figure 2 is a perspective view of the erected state of the adjustable height folding box shown in Figure 1, wherein the corner post in the folding box is at the highest position;
  • Figure 3 is a perspective view of the adjustable height folding box of Figure 1 rotated from a erected state to a folded state;
  • Figure 4 is a perspective view of the folded state of the adjustable height folding box shown in Figure 1;
  • Figure 5 is a schematic illustration of a folding box with balancing device in accordance with a preferred embodiment of the present invention.
  • Figure 6 is a schematic view of the balance spring pull arm of the balancing device of the folding box shown in Figure 5;
  • Figure 7 is a schematic view showing a transition critical state of the second end position of the balance spring pull arm of the balancing device of the folding box shown in Figure 5;
  • Figure 8 is a schematic view showing the position of the second end of the balance spring pull arm of the balancing device of the folding box shown in Figure 5;
  • FIG. 9 is a schematic illustration of an adjustable height folding box in accordance with another embodiment of the present invention, wherein the balance spring is a compression spring.
  • Compression spring 151 connecting plate
  • Chassis notch 3 Rotary shaft
  • FIG. 5 there is shown a folding box having a balancing device according to the present invention, the folding box including a chassis 6 and a folding box end frame 4 disposed at both ends of the chassis 6, the folding box end A corner post 41 can be disposed on each side of the frame 4, respectively.
  • the corner post 41 may include a sleeved inner corner post and an outer corner post, the inner corner post being slidable within the outer corner post to achieve the height of the end frame 4.
  • the end frame 4 is rotatably coupled to the chassis 6 by a hinge device.
  • the hinge device includes a fixed hinge 44 fixedly coupled to the chassis 6, a living hinge 42 fixedly coupled to the end frame 4, and a rotating shaft 7 disposed between the fixed hinge 44 and the living hinge.
  • the living hinge 42 is disposed at the bottom end of the corner post 41.
  • the folding box according to the present invention further includes a balancing device including a balance spring holder 61, a balance spring pull arm 43, and a balance spring 5.
  • a balance spring mount 61 is provided on the chassis 6.
  • the balance spring pull arm 43 is connected to a portion of the living hinge 42 that is adjacent to the rotary shaft 7 (for example, by a fixed connection of welding).
  • a balance spring pull arm hole 431 is disposed on the balance spring pull arm 43.
  • the first end of the balance spring 5 is coupled to the balance spring mount 61, and the second end of the balance spring 5 is coupled to the balance spring pull arm 43 via the balance spring pull arm hole 431.
  • the balance spring pull arm hole 431 is configured as an elongated hole having a first position and a second position, and as will be described in detail below, the second end of the balance spring 5 can be in the first position and the second position Move between positions.
  • the balance spring 5 When the end frame 4 is in the upright position, the balance spring 5 is coupled to the first position of the balance spring pull arm hole 431.
  • the side of the chassis 6 is also provided with an end frame support 62.
  • the balance spring 5 When the end frame 4 is folded onto the end frame support 62, the balance spring 5 is connected to the second position of the balance pull arm hole 431 when the end frame 4 is oriented from the vertical position.
  • the end frame support 62 is folded, the second end of the balance spring 5 is moved from the first position of the balance spring pull arm hole 431 to the second position.
  • the folding box end frame 4 is hinged to the bottom frame 6 via the rotating shaft 7, and the first end of the balance spring 5 is fixedly connected with the bottom frame 6 through a balance spring fixing seat 61 (for example, a hook), and the second end of the balance spring 5 is pulled by the balance spring
  • the arm 43 is fixedly coupled to the folding box end frame 4. Thereby, the folding box end frame 4 can be tilted or erected around the rotating shaft 7. At this time, the folding box end frame 4 drives the balance spring pulling arm 43 to move together through the living hinge 42 , and the balance spring pulling arm 43 pulls the balance spring 5.
  • the balance spring 5 is thus stretched or compressed and thus generates a reaction force.
  • the fixed point at which the balance spring mount 61 defines the balance spring 5 is defined as a fixed point C.
  • the two positions of the balance spring pull arm hole 431 are respectively defined as a first position point A and a second position point B, and the second end of the balance spring 5 is at the first position point A and the second position.
  • Point B can be moved.
  • the first position point A is an end portion of the balance spring pull arm hole 431 close to the rotation shaft 7
  • the second position point B is an end portion of the balance spring pull arm hole 431 away from the rotation shaft 7.
  • the balance spring pull arm aperture 431 has a length D of about 15 millimeters. That is, the position of the first position point A to the second position point B is approximately 15 mm.
  • the second end of the balance spring 5 is movable in the range of the length D.
  • the balance spring pull arm hole 431 has a long hole
  • the balance spring pull arm hole 431 may also be configured as a V-shaped hole, a curved hole or other shape.
  • the folding box end frame 4 when the folding box end frame 4 is in a substantially vertical state, that is, when the balancing device is in the initial state, the distance AC between the first position point A and the fixed point C is smaller than the second position point B to the fixed position.
  • the balance spring 5 At a distance BC between the points C, the balance spring 5 is in a state ready to be stretched.
  • the angle R1 between the balance spring pull arm hole 431 and the horizontal plane is about 153 degrees, for example.
  • FIG 7 a schematic transition state of the second end position of the balance spring pull arm 43 during operation of the balancing device is schematically illustrated.
  • the folding box end frame 4 is lowered and the angle R3 with the horizontal plane is about 12 degrees.
  • the distance AC between the first position point A and the fixed point C is greater than the distance BC between the second position point B and the fixed point C.
  • the angle R2 of the balance spring pull arm hole 431 to the horizontal plane is about 75 degrees, and the second end of the balance spring 5 is at the first position point A.
  • the second end of the balance spring 5 moves from the first position point A to the second position point B as the folding box end frame 4 is tilted downward.
  • the second end of the balance spring 5 has a tendency to move from the first position point A to the second position point B.
  • FIG. 8 it schematically shows a schematic view of the position of the second end of the balance spring pull arm 43 during the operation of the balance device, in which the folder between the end frame 4 of the folding box and the horizontal plane is clamped.
  • the angle R4 is about 11 degrees.
  • the distance AC between the first position point A and the fixed point C is greater than the distance BC between the second position point B and the fixed point C.
  • the angle R5 of the balance spring pull arm hole 431 and the horizontal plane is about 73 degrees, and the second end of the balance spring 5 is at the second position point B.
  • the balance spring 5 is folded to the box.
  • the moment generated by the end frame 4 is small when the second end of the balance spring 5 is at the first position point A because of the difference between the tension force and the force arm size.
  • the gravity moment of the folding box end frame 4 is dominant. Acting, whereby the folding box end frame 4 can be smoothly rested on the end frame support provided on the chassis 6.
  • the distance between the balance spring pull arm hole 431 and the balance spring mount 61 experiences a distance AC from the first position point A to the fixed point C is greater than the second position point B to the fixed point.
  • the distance BC between C, and then the distance AC between the first position point A and the fixed point C is smaller than the distance BC between the second position point B and the fixed point C.
  • the second end of the balance spring 5 undergoes a process of moving from the second position point B to the first position point A, which corresponds inversely to the folding box end frame 4 folding process described above.
  • the balance spring pulling arm can drive the balance spring to stretch or compress when the folding box end frame is fallen down or folded, and the reaction force generated by the balance spring can be pulled by the balance spring
  • the arm acts on the end frame to generate a balance assist torque, which is offset by the gravity moment of the end frame to achieve the balance of the end frame of the folding box.
  • the balance spring 5 is a tension or compression spring.
  • the balance spring is a compression spring.
  • the first end of the compression spring 15 is coupled to a balance spring mount 61 that is coupled to the chassis by a support 63.
  • the second end of the compression spring 15 is coupled to the balance spring pull arm 43 via a connecting plate 151 and a pin that is disposed in the balance spring pull arm hole 431.
  • the compression spring has a better balance force with respect to the tension spring, and can better meet the balance requirement of the larger end frame.
  • the friction between the end frame and the balance spring is sliding friction
  • the static friction angle is about 8°, that is, in the limit case, the end frame needs to be changed by 8° to generate the position. Variety.
  • the friction between the end frame and the compression spring is rolling friction
  • the static friction angle is about 0.35°, that is, in the limit case, the end frame needs to be changed by 0.35° to change the position. In other words, with rolling friction, the compression spring is more sensitive to changes in the position of the end frame.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)

Abstract

一种具有平衡装置的折叠箱，其包括底架（6）和设置在底架（6）两端的端架（4），平衡装置包括平衡弹簧固定座（61）、平衡弹簧拉臂（43）和平衡弹簧（5），平衡弹簧固定座（61）设置在底架（6）上；平衡弹簧拉臂（43）与活动铰链（42）靠近旋转轴（7）的部分连接，平衡弹簧拉臂（43）上设置有平衡弹簧拉臂孔（431）；平衡弹簧（5）的第一端与平衡弹簧固定座（61）连接，平衡弹簧（5）的第二端通过平衡弹簧拉臂孔（431）与平衡弹簧拉臂（43）连接，在折叠箱端架（4）倒下或者折叠时，平衡弹簧拉臂（43）能够带动平衡弹簧（5）拉伸或者压缩，而平衡弹簧（5）产生的反作用力可通过平衡弹簧拉臂（43）作用于端架（4），产生平衡辅助力矩，与端架（4）的重力力矩抵消，达到折叠箱端架（4）平衡的目的。

Description

具有平衡装置的折叠箱 技术领域
本发明涉及机械领域，尤其涉及一种具有平衡装置的折叠箱。
背景技术
如图1所示，现有技术中的可调节高度折叠箱包括折叠箱端架1，折叠箱外角柱11、折叠箱内角柱12、内角柱锁块13、折叠箱底架2和旋转轴3。折叠箱端架1通过旋转轴3与折叠箱底架2铰接，折叠箱内角柱12在折叠箱外角柱11中，通过内角柱锁块13锁定和解锁，内角柱锁块13解锁后，内角柱12的高度可以进行调节，折叠箱端架1位于竖起状态，折叠箱内角柱12处于最低位置。端架支撑21为可伸缩结构，图示为缩进去的工作状态，当折叠箱端架1倒下来时，端架支撑21伸出来后可作为一个支撑点让折叠箱端架1停靠在一定的倾斜角度，用于方便更换或者调节折叠箱内角柱12的长短伸缩，折叠箱底架2上设有底架缺口22，设计目的是折叠箱端架1倒下之后能够平整地嵌套在折叠箱底架2中，底架缺口22的大小与折叠箱底架的强度和装货空间有着一定的关联，为了达到最优化，底架缺口22尺寸是以折叠箱端架1中的折叠箱内角柱12处于最低位置时所设计的。
如图2所示，折叠箱内角柱12可以处于最高位置，端架支撑21处于伸出来的状态。如图3所示，折叠箱倒下时，端架支撑21处于伸出来的工作状态，折叠箱端架1依靠在端架支撑21上，折叠箱端架1与水平面形成一个小的角度，人能够轻易地对折叠箱内角柱12进行伸缩的调节。如图4所示，端架支撑21可以处于缩进去的状态，此时折叠箱内角柱12处于最低位置，折叠箱端架1能够完全倒下嵌到折叠箱底架2上的底架缺口22中。
此外，美国专利申请US6227397B1中公开了一种台架式集装箱，包括有可折叠的端架，其包括固定的外角柱和可伸缩调节高度的内角柱，以及其内角柱固定和加强的装置，由于内角柱可以伸缩调整，集装箱的高度可以因此有不同的变化，以适应不同高度货物的装载需要，由于内角柱的伸缩调整，可折叠的端架的重心位置因此也会发生相对应的变化。
为了方便可折叠的端架进行竖起和折叠操作，此类型台架式集装箱会设有平衡装置，平衡装置一般为板簧或者拉伸式弹簧，在平衡装置的辅助下，可折叠的端架可以轻松的通过人工去进行折叠或者竖起的操作，已公开的带可调节高度的内角柱的可折叠的端架由于重心会根据内角柱的调整而变化，即可折叠的端架倒下或者竖起过程中的重力力矩曲线会根据内角柱的调整而不一样，但平衡所产生的平衡力矩是固定的，只能对内角柱其中的一种伸缩高度所对应的重心高度所产生的重力力矩曲线进行良好的平衡辅助，对于其余内角柱高度所产生的重心高度变化所对应的重力力矩曲线的平衡辅助，只能通过人工力去进行补充。
为了让在整个内角柱高度变化范围内平衡达到最优的效果，平衡装置设计参考为当内角柱处于可调节范围的中间位置时所对应的端架重心所产生的重力力矩曲线作为参考，即当内角柱处于可调节范围中间位置时，重力力矩曲线等于平衡辅助曲线，能达到最好的平衡效果，当内角柱处于可调节范围最高位置时，重力力矩曲线大于平衡辅助曲线，重力力矩作为主导，端架能够自由落下，竖起时需要人工辅助，当内角柱处于可调节范围最低位置时，重力力矩曲线小于平衡辅助曲线，平衡辅助力矩作为主导，端架需要人工辅助才能落下，竖起时能够自由竖起。
端架倒下后，为了让端架嵌到底架上，与底架平面水平，底架上开有缺口避让内外角柱，缺口的大小会影响到底架的强度，为了让底架强度达到最小程度的损失，端架放平时内角柱处于可调节范围最低位置，此时端架占用最小的底架缺口。
但需要人工进行对内角柱高度的调节，考虑到操作的便捷性，高度调节的位置设置在端架倒下后与水平面成一定夹角，以方便进行人工调节。高度调节的位置设置有可伸缩的端架支撑，当内角柱处于可调节范围中间到最高位置范围内时，端架重力力矩作为主导，端架能够平稳地停靠在端架支撑上，当内角柱处于可调节范围中间到最低位置范围内时，平衡辅助力矩作为主导，端架需要人工力辅助才能停靠在端架支撑上，人工在对内角柱高度调节时需要一边限制端架因为平衡辅助力矩的作用产生的竖起趋势，一边对内角柱高度调节，对于操作上极为不便，而且有安全隐患。
发明内容
为至少部分地解决上述技术问题，根据本发明的一个方面，提供了一种具有平衡装置的折叠箱，包括底架和设置在所述底架两端的端架，以及设置在所述底架与所述端架之间的铰链装置，所述铰链装置包括固定铰链、活动铰链以及穿设在所述固定铰链与所述活动铰链之间的旋转轴，所述固定铰链与所述底架固定连接，所述活动铰链与所述端架固定连接，其特征在于，所述折叠箱还包括平衡装置，所述平衡装置包括：
平衡弹簧固定座，所述平衡弹簧固定座设置在所述底架上；
平衡弹簧拉臂，所述平衡弹簧拉臂与所述活动铰链靠近所述旋转轴的部分连接，所述平衡弹簧拉臂上设置有平衡弹簧拉臂孔；以及
平衡弹簧，所述平衡弹簧的第一端与所述平衡弹簧固定座连接，所述平衡弹簧的第二端通过所述平衡弹簧拉臂孔与所述平衡弹簧拉臂连接；
其中，所述平衡弹簧拉臂孔具有第一位置和第二位置，在所述端架处于竖直位置时，所述平衡弹簧连接在所述平衡弹簧拉臂孔的所述第一位置；所述底架的侧面还设置有端架支撑，当端架折叠到所述端架支撑上时，所述平衡弹簧连接在所述平衡拉臂孔的所述第二位置，当所述端架从竖直位置折叠向所述端架支撑时，所述平衡弹簧从所述平衡弹簧拉臂孔的所述第一位置移动到所述第二位置。
可选地，所述平衡弹簧拉臂孔为长条孔、V型孔或弧形孔。
可选地，所述平衡弹簧为拉伸式或者压缩式弹簧。
可选地，所述平衡弹簧包括弹簧和连接板，所述弹簧的第一端与所述平衡弹簧固定座连接，所述弹簧的第二端与所述连接板的一端连接，所述连接板的另一端通过所述平衡弹簧拉臂孔与所述平衡弹簧拉臂连接。
可选地，所述端架包括设置在其两侧的角柱，所述角柱包括内角柱和外角柱，所述内角柱在所述外角柱内可滑动。
根据本发明的具有平衡装置的折叠箱，包括平衡弹簧固定座、平衡弹簧拉臂和平衡弹簧，在折叠箱端架倒下或者折叠时，平衡弹簧拉臂能够带动平衡弹簧拉伸或者压缩，而平衡弹簧产生的反作用力可通过平衡弹簧拉臂作用于端架，产生平衡辅助力矩，与端架的重力力矩抵消，达到折叠箱端架平衡的目的。
附图说明
为了使本发明的优点更容易理解，将通过参考在附图中示出的具体实施例更详细地描述上文简要描述的本发明。可以理解这些附图只描绘了本 发明的典型实施例，因此不应认为是对其保护范围的限制，通过附图以附加的特性和细节描述和解释本发明。在附图中：
图1为现有技术中的一种可调节高度折叠箱的竖起状态的立体视图，其中折叠箱内角柱处于最低位置；
图2为图1示出的一种可调节高度折叠箱的竖起状态的立体视图，其中折叠箱内角柱处于最高位置；
图3为图1示出的一种可调节高度折叠箱的从竖起状态向折叠状态旋转一定角度的立体视图；
图4为图1示出的一种可调节高度折叠箱的折叠状态的立体视图；
图5为根据本发明的一种优选实施方式的具有平衡装置的折叠箱的示意图；
图6为图5示出的折叠箱的平衡装置的平衡弹簧拉臂的示意图；
图7为图5示出的折叠箱的平衡装置的平衡弹簧拉臂的第二端位置的转换临界状态的示意图；
图8为图5示出的折叠箱的平衡装置的平衡弹簧拉臂的第二端位置转换后的示意图；以及
图9为根据本发明的另一种实施方式的可调节高度折叠箱的示意图，其中，平衡弹簧为压缩式弹簧。
附图标记说明：
1：     折叠箱端架             11：     折叠箱外角柱
12：    折叠箱内角柱           13：     内角柱锁块
15：    压缩式弹簧             151：    连接板
2：     折叠箱底架             21：     端架支撑
22：    底架缺口               3：      旋转轴
4：     折叠箱端架             41：     角柱
42：    活动铰链               43：     平衡弹簧拉臂
431：   平衡弹簧拉臂孔         44：     活动铰链
5：     平衡弹簧               6：      底架
61：    平衡弹簧固定座         62：     端架支撑
7：     旋转轴
具体实施方式
在下文的讨论中，给出了细节以便提供对本发明更为彻底的理解。然 而，本领域技术人员可以了解，本发明可以无需一个或多个这些细节而得以实施。在特定的示例中，为了避免与本发明发生混淆，对于本领域公知的一些技术特征未进行详尽地描述。需要说明的是，本文中所使用的术语“上”、“下”、“前”、“后”、“左”、“右”以及类似的表述只是为了说明的目的，并非限制。
如图5所示，其示出了根据本发明的一种具有平衡装置的折叠箱，该折叠箱包括底架6以及设置在底架6的两端处的折叠箱端架4，折叠箱端架4的两侧分别可设置有角柱41。可选地，角柱41可以包括套设的内角柱和外角柱，内角柱可在外角柱内可滑动，以实现端架4的高度。
端架4通过铰链装置与底架6可旋转地连接。铰链装置包括与底架6固定连接的固定铰链44、与端架4固定连接的活动铰链42，以及传设在固定铰链44和活动铰链之间的旋转轴7。具体地，在图示实施方式中，活动铰链42设置在角柱41的底端处。
此外，根据本发明的折叠箱还包括平衡装置，平衡装置包括平衡弹簧固定座61、平衡弹簧拉臂43以及平衡弹簧5。平衡弹簧固定座61设置在底架6上。平衡弹簧拉臂43与活动铰链42靠近旋转轴7的部分连接(例如通过焊接的固定连接方式)。平衡弹簧拉臂43上设置有平衡弹簧拉臂孔431。而平衡弹簧5的第一端与平衡弹簧固定座61连接，平衡弹簧5的第二端通过平衡弹簧拉臂孔431与平衡弹簧拉臂43连接。
进一步，参考图6，平衡弹簧拉臂孔431构造为长型孔，其具有第一位置和第二位置，如下文将详细描述的，平衡弹簧5的第二端能够在第一位置和第二位置之间移动。
在端架4处于竖直位置时，平衡弹簧5连接在平衡弹簧拉臂孔431的第一位置。底架6的侧面还设置有端架支撑62，当端架4折叠到端架支撑62上时，平衡弹簧5连接在平衡拉臂孔431的第二位置，当端架4从竖直位置向端架支撑62折叠时，平衡弹簧5的第二端从平衡弹簧拉臂孔431的第一位置移动到第二位置。
折叠箱端架4通过旋转轴7与底架6铰接，平衡弹簧5的第一端通过平衡弹簧固定座61(例如挂钩)与底架6固定连接，平衡弹簧5的第二端通过平衡弹簧拉臂43与折叠箱端架4固定连接。由此，折叠箱端架4绕旋转轴7可以倒下或者竖起运动，此时，折叠箱端架4通过活动铰链42带动平衡弹簧拉臂43共同运动，而平衡弹簧拉臂43拉动平衡弹簧5，平衡弹 簧5因此受到拉伸或者压缩并因此产生反作用力。
如图5所示，定义平衡弹簧固定座61固定平衡弹簧5的固定点为固定点C。现请转到图6，分别定义平衡弹簧拉臂孔431的两个位置分别为第一位置点A和第二位置点B，平衡弹簧5的第二端在第一位置点A和第二位置点B之间可移动。其中，第一位置点A为平衡弹簧拉臂孔431的靠近旋转轴7的端部，而第二位置点B为平衡弹簧拉臂孔431的远离旋转轴7的端部。在图示实施方式中，平衡弹簧拉臂孔431的长度D约为15毫米。即，第一位置点A到第二位置点B的位置大约为15毫米。也就是，平衡弹簧5的第二端能够在该长度D的范围中移动。当然，虽然在图示实施方式中，平衡弹簧拉臂孔431位长条孔，但平衡弹簧拉臂孔431也可以构造为V型孔、弧形孔或者其他的形状
如图5所示，在折叠箱端架4处于大致垂直的状态中，即平衡装置位于初始状态中时，第一位置点A到固定点C之间的距离AC小于第二位置点B到固定点C之间的距离BC，平衡弹簧5处于准备拉伸的状态。此时，平衡弹簧拉臂孔431与水平面的夹角R1约为例如153度。由此，根据力学原理可以理解的是，平衡弹簧5的第二端应处于平衡弹簧拉臂孔431中的第一位置点A处。
现请转到图7，其示意性地示出了平衡装置的工作过程中平衡弹簧拉臂43的第二端位置的转换临界状态。在该状态中，折叠箱端架4倒下并与水平面之间的夹角R3约为12度。此时，第一位置点A到固定点C之间的距离AC大于第二位置点B到固定点C之间的距离BC。
在图示状态中，平衡弹簧拉臂孔431与水平面的夹角R2约为75度，平衡弹簧5的第二端处于第一位置点A处。根据力学原理，如果不考虑摩擦，平衡弹簧5的第二端随着折叠箱端架4向下倾倒而从第一位置点A向第二位置点B移动。换句话说，随着折叠箱端架4往下倒的趋势，平衡弹簧5的第二端有从第一位置点A运动到第二位置点B的趋势。
如图8所示，其示意性地示出了平衡装置的工作过程中平衡弹簧拉臂43的第二端位置转换后的示意图，在该状态下，折叠箱端架4与水平面之间的夹角R4约为11度。此时，第一位置点A到固定点C之间的距离AC大于第二位置点B到固定点C之间的距离BC。
在图示状态中，平衡弹簧拉臂孔431与水平面的夹角R5约为73度，平衡弹簧5的第二端处于第二位置点B处，根据力学原理，此时平衡弹簧5对折叠箱端架4所产生的力矩因为拉力大小和力臂大小两个因素的差异， 相对于平衡弹簧5的第二端位于第一位置点A处时小，此时折叠箱端架4重力力矩起主导作用，由此，折叠箱端架4能够平稳地停靠在设置在底架6上的端架支撑上。
在折叠箱端架4竖起过程中，平衡弹簧拉臂孔431到平衡弹簧固定座61的距离经历从第一位置点A到固定点C之间的距离AC大于第二位置点B到固定点C之间的距离BC，之后第一位置点A到固定点C之间的距离AC小于第二位置点B到固定点C之间的距离BC的过程。
可以理解的是，平衡弹簧5的第二端经历从第二位置点B向第一位置点A移动的过程，这与上文所述的折叠箱端架4折叠过程逆向对应。
根据本发明的平衡装置及具有其的折叠箱，使得在折叠箱端架倒下或者折叠时，平衡弹簧拉臂能够带动平衡弹簧拉伸或者压缩，而平衡弹簧产生的反作用力可通过平衡弹簧拉臂作用于端架，产生平衡辅助力矩，与端架的重力力矩抵消，达到折叠箱端架平衡的目的。
可选地，平衡弹簧5为拉伸式或者压缩式弹簧。
现请转到图9，其示出了平衡弹簧为压缩式弹簧的情形。在图示实施方式中，压缩式弹簧15的第一端与平衡弹簧固定座61连接，该平衡弹簧固定座61通过支撑件63连接至底架。而压缩式弹簧15的第二端通过连接板151和传设在平衡弹簧拉臂孔431中的销轴与平衡弹簧拉臂43连接。
由此，压缩式弹簧相对拉伸式弹簧具有更好的平衡力，更能满足较大端架的平衡要求。并且，在平衡弹簧为拉钩弹簧的情形中，端架与平衡弹簧之间的摩擦为滑动摩擦，静摩擦角约为8°，即在极限情况下，端架需要多变化8°后才能产生位置的变化。而使用压缩式弹簧，端架与压缩式弹簧之间的摩擦为滚动摩擦，静摩擦角约为0.35°，即在极限情况下，端架需要多变化0.35°后才能产生位置的变化。换句话说，使用滚动摩擦，压缩式弹簧对端架的位置变化会更加灵敏。
除非另有定义，本文中所使用的技术和科学术语与本发明的技术领域的技术人员通常理解的含义相同。本文中使用的术语只是为了描述具体的实施目的，不是旨在限制本发明。本文中出现的诸如“部件”等术语既可以表示单个的零件，也可以表示多个零件的组合。本文中出现的诸如“安装”、“设置”等术语既可以表示一个部件直接附接至另一个部件，也可以表示一个部件通过中间件附接至另一个部件。本文中在一个实施方式中描述的特征可以单独地或与其它特征结合地应用于另一个实施方式，除非该特征在该另一个实施方式中不适用或是另有说明。
本发明已经通过上述实施方式进行了说明，但应当理解的是，上述实施方式只是用于举例和说明的目的，而非意在将本发明限制于所描述的实施方式范围内。本领域技术人员可以理解的是，根据本发明的教导还可以做出更多种的变型和修改，这些变型和修改均落在本发明所要求保护的范围以内。

Claims (5)

  1. 一种具有平衡装置的折叠箱，包括底架和设置在所述底架两端的端架，以及设置在所述底架与所述端架之间的铰链装置，所述铰链装置包括固定铰链、活动铰链以及穿设在所述固定铰链与所述活动铰链之间的旋转轴，所述固定铰链与所述底架固定连接，所述活动铰链与所述端架固定连接，其特征在于，所述折叠箱还包括平衡装置，所述平衡装置包括：
    平衡弹簧固定座，所述平衡弹簧固定座设置在所述底架上；
    平衡弹簧拉臂，所述平衡弹簧拉臂与所述活动铰链靠近所述旋转轴的部分连接，所述平衡弹簧拉臂上设置有平衡弹簧拉臂孔；以及
    平衡弹簧，所述平衡弹簧的第一端与所述平衡弹簧固定座连接，所述平衡弹簧的第二端通过所述平衡弹簧拉臂孔与所述平衡弹簧拉臂连接；
    其中，所述平衡弹簧拉臂孔具有第一位置和第二位置，在所述端架处于竖直位置时，所述平衡弹簧连接在所述平衡弹簧拉臂孔的所述第一位置；所述底架的侧面还设置有端架支撑，当端架折叠到所述端架支撑上时，所述平衡弹簧连接在所述平衡拉臂孔的所述第二位置，当所述端架从竖直位置向所述端架支撑折叠时，所述平衡弹簧从所述平衡弹簧拉臂孔的所述第一位置移动到所述第二位置。
  2. 根据权利要求1所述的折叠箱，其特征在于，所述平衡弹簧拉臂孔为长条孔、V型孔或弧形孔。
  3. 根据权利要求1所述的折叠箱，其特征在于，所述平衡弹簧为拉伸式或者压缩式弹簧。
  4. 根据权利要求3所述的折叠箱，其特征在于，所述平衡弹簧包括弹簧和连接板，所述弹簧的第一端与所述平衡弹簧固定座连接，所述弹簧的第二端与所述连接板的一端连接，所述连接板的另一端通过所述平衡弹簧拉臂孔与所述平衡弹簧拉臂连接。
  5. 根据权利要求1至4中的任一项所述的折叠箱，其特征在于，所述端架包括设置在其两侧的角柱，所述角柱包括内角柱和外角柱，所述内角柱在所述外角柱内可滑动。
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