WO2013026286A1 - 液压升降尾板机构 - Google Patents

液压升降尾板机构 Download PDF

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Publication number
WO2013026286A1
WO2013026286A1 PCT/CN2012/074514 CN2012074514W WO2013026286A1 WO 2013026286 A1 WO2013026286 A1 WO 2013026286A1 CN 2012074514 W CN2012074514 W CN 2012074514W WO 2013026286 A1 WO2013026286 A1 WO 2013026286A1
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WO
WIPO (PCT)
Prior art keywords
hydraulic
unit
connecting rod
lifting tailgate
link
Prior art date
Application number
PCT/CN2012/074514
Other languages
English (en)
French (fr)
Inventor
李庆富
吴梅江
仇文卿
李洪全
李锋
Original Assignee
北汽福田汽车股份有限公司
北京智科投资管理有限公司
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Application filed by 北汽福田汽车股份有限公司, 北京智科投资管理有限公司 filed Critical 北汽福田汽车股份有限公司
Publication of WO2013026286A1 publication Critical patent/WO2013026286A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/44—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading having a loading platform thereon raising the load to the level of the load-transporting element
    • B60P1/4414—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading having a loading platform thereon raising the load to the level of the load-transporting element and keeping the loading platform parallel to the ground when raising the load
    • B60P1/4421—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading having a loading platform thereon raising the load to the level of the load-transporting element and keeping the loading platform parallel to the ground when raising the load the loading platform being carried in at least one vertical guide

Definitions

  • This invention relates to automotive body structures, and more particularly to a hydraulic lift tailgate mechanism for transporting cargo from the ground to the floor of a car's cargo container or transporting cargo from the car's cargo case to the ground. Background technique
  • the technical problem to be solved by the present invention is to reduce the labor intensity of loading and unloading goods of a truck under the premise of ensuring that the structure of the automobile is simplified and compact.
  • the present invention provides a hydraulic lifting tailgate mechanism including a hydraulic driving unit, a lifting tailgate unit, and a link unit connecting the hydraulic driving unit and the lifting tailgate unit
  • the hydraulic drive unit is disposed at the rear of the automobile container, and includes a fuel tank, a hydraulic pump, a left hydraulic cylinder, and a right hydraulic cylinder.
  • the hydraulic pump and the fuel tank are connected and disposed under the floor of the automobile container.
  • the left hydraulic cylinder and the right hydraulic cylinder are respectively disposed at two sides of the rear portion of the automobile cargo box and connected with the hydraulic pump; the hydraulic connecting rod of the left hydraulic cylinder and the hydraulic connecting rod of the right hydraulic cylinder and the connecting rod unit connection.
  • the hydraulic driving unit drives the link unit to perform a telescopic movement, wherein the connecting rod unit is contracted close to the automobile container, and the connecting rod unit is extended away from the automobile cargo box; the connecting rod unit is disposed in the automobile cargo
  • the rear part of the box is connected to the lifting tailgate unit to drive the lifting tailgate unit to move up and down.
  • the connecting rod unit contracts, the lifting tailgate unit rises.
  • the lifting tailgate unit decline.
  • a front pillar is disposed on both sides of the rear portion of the automobile cargo box, the front pillar is a hollow cylinder, and an opening of the front pillar facing the lifting tailgate unit; the left hydraulic cylinder and the right hydraulic cylinder Installed in the front column on the same side as the other.
  • the link unit includes a left link member and a right link member having the same structure; the left and right link members are respectively disposed at two sides of the rear portion of the automobile case, and each includes at least one link, One end of the connecting rod is rotatably connected to the rear part of the automobile case, and the other end is rotatably connected with the lifting tail plate unit, and the left hydraulic oil cylinder and the right hydraulic oil cylinder are respectively connected with one connecting rod on the same side thereof.
  • the lifting tailgate unit comprises a loading plate, and two sides of the loading plate are respectively provided with a rear pillar perpendicular to the loading plate, and the left connecting rod and the right connecting rod member respectively are opposite to the rear pillar of the same side Rotating connection; after the connecting rod unit is contracted, the loading board is level with the floor of the automobile container, and after the connecting rod unit is extended, the carrying board is level with the ground.
  • the lifting tailgate unit further comprises a zipper disposed on two sides of the loading plate, the zipper end is connected to the top end of the rear pillar, and the other end is connected to the side wall of the cargo board on the same side thereof.
  • the loading plate is rotatably connected to the rear pillar.
  • the length of the cargo board in the direction of the longitudinal beam of the frame is not less than the height of the cargo box of the automobile.
  • the rear pillar is a hollow cylinder, and the rear pillar has an opening on a side facing the front pillar.
  • the hydraulic lifting tailgate mechanism further includes a control unit coupled to the hydraulic pump to control opening or closing of the hydraulic pump.
  • the hydraulic lifting tail plate mechanism provided by the above technical solution can realize the lifting and lowering of the lifting tailgate unit by using the hydraulic driving unit to drive the connecting rod unit, the structure is simple, the weight is light, and the production cost is low; the arrangement of the hydraulic driving unit makes the whole hydraulic lifting
  • the tailgate mechanism occupies less space, has a compact structure, and has a simple manufacturing process. It can be installed on the original flat container car by using the common connection method.
  • the cargo handling can be realized by one-person operation control unit, which reduces the labor intensity. , improve the operational efficiency of trucks.
  • FIG. 1 is a schematic structural view of a hydraulic lifting tailgate mechanism according to an embodiment of the present invention
  • Figure 2 is a left side view of Figure 1;
  • Fig. 3 is a schematic view showing the structure of a control unit of a hydraulic lifting tailgate mechanism in an embodiment of the present invention.
  • 1 left front column; 2: right front column; 3: left hydraulic cylinder; 4: right hydraulic cylinder; 5: left hydraulic connecting rod; 6: right hydraulic connecting rod; 7: left rear column; 8: right rear column; 9: Left zipper; 10: Right zipper; 11: Left high pressure tubing; 12: Right high pressure tubing; 13: Left rear taillight panel; 14: Right rear taillight panel; 15: Fuel tank; 16: Gear pump; 18: upper left link; 19: lower left link; K: switch. detailed description
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
  • installation In the description of the embodiment, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixedly connected, integrally connected, unless otherwise specifically defined and defined. It may also be a detachable connection; it may be directly connected, or may be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms may be understood according to the specific situation.
  • Fig. 1 is a schematic view showing the structure of the hydraulic lifting tailgate mechanism of the present embodiment, and Fig. 1 is a left side view based on Fig. 1.
  • the hydraulic lifting tailgate mechanism comprises a hydraulic driving unit, a connecting rod unit and a lifting tailgate unit, and the whole mechanism is installed at the rear of the automobile cargo box, and the hydraulic driving unit drives the connecting rod unit to expand and contract, and here,
  • the rod unit is close to the car cargo box for contraction, and the connecting rod unit is extended away from the automobile cargo box; the connecting rod unit drives the lifting tailgate unit to lift and lower, and the loaded and unloaded goods are placed on the lifting tailgate unit, thereby realizing quick and convenient cargo loading and unloading.
  • the automobile cargo box is not provided with a rear cover
  • the hydraulic drive unit is disposed at the rear of the automobile cargo box
  • the hydraulic drive unit specifically includes the oil tank 15 and the hydraulic pump (the hydraulic pump can be of various types, such as a gear pump, a blade The pump, the plunger pump and the like, in this embodiment, the gear pump 16), the two can be arranged in one piece, installed under the floor of the automobile cargo box, supported by the bracket, and the left rear tail light plate 13 is also arranged on the bracket, right Rear tail plate 14 and auxiliary components such as license plates.
  • the high-pressure oil generated by the gear pump 16 is transmitted to the hydraulic cylinder through the high-pressure oil pipe, and the left hydraulic cylinder 3 and the right hydraulic cylinder 4 are respectively disposed at the rear portions of the two sides of the automobile cargo box, and the gear pump 16 passes through the left high-pressure oil pipe 11 and the left hydraulic oil cylinder 3 In connection, the gear pump 16 is connected to the right hydraulic cylinder 4 via the right high pressure oil pipe 12.
  • the left front pillar 1 and the right front pillar 2 are respectively disposed at the rear portions of the two sides of the automobile cargo box, both of which are hollow cylinders, and the rear side panels of the two pillars have openings.
  • Left hydraulic cylinder 3 and right hydraulic The cylinders 4 are respectively disposed in the hollow cavities of the left front pillar 1 and the right front pillar 2, which can improve the compactness of the entire component structure and prevent the hydraulic cylinder from being exposed to the outside and affect the overall appearance.
  • the link unit of the embodiment includes the left link member and the right link member which are identical in structure, and the left link member includes two parallelly arranged links, which are respectively the upper left link 18 and the lower left link 19, and the two links are connected.
  • the rod spacing is arranged to be rotatably connected to the left front pillar 1, respectively.
  • the left hydraulic connecting rod 5 of the left hydraulic cylinder 3 is connected to the upper left link 18, and the movement of the left hydraulic cylinder 3 piston drives the upper left link 18 through the left hydraulic connecting rod 5.
  • the right link member also includes two parallelly disposed links (not shown) which are respectively on the same level as the upper left link 18 and the lower left link 19, and the two links
  • the rods are rotatably coupled to the right front pillar 2, respectively.
  • the right hydraulic connecting rod 6 of the right hydraulic cylinder 4 is connected to the upper right link, and the piston of the right hydraulic cylinder 4 moves simultaneously with the piston of the left hydraulic cylinder 3, and the right upper connecting rod is moved by the right hydraulic connecting rod 6.
  • the four-bar linkage mechanism formed by the left link member and the right link member drives the lift tailgate unit to smoothly move up and down.
  • the lifting tailgate unit includes a loading plate 17 and left and right rear pillars 8 and right rear pillars 8 disposed on both sides of the cargo panel 17, and the left upper link 18 and the lower left link 19 included in the left link member One end is rotatably connected to the left rear pillar 7, and the other ends of the right upper link and the lower right link included in the right link are respectively rotatably connected to the right rear pillar 8.
  • the four-bar linkage mechanism drives the left rear pillar 7 and the right rear pillar 8 to drive the lifting and lowering of the loading plate 17.
  • the structure and positional relationship between the four-bar linkage mechanism and the left rear pillar 7 and the right rear pillar 8 can satisfy the contraction of the link unit, and the rear pillar 7 and the right rear pillar 8 drive the loading plate 17 to rise, and finally the loading plate 17 is
  • the bottom of the car cargo box is level, which facilitates loading the cargo from the ground into the cargo box through the loading board 17; when the connecting rod unit is extended, the rear pillar 7 and the right rear pillar 8 drive the loading board 17 to descend, and finally the loading board 17 is level with the ground, facilitating the removal of cargo from the car's cargo container via the load plate 17.
  • the left rear pillar 7 and the right rear pillar 8 are also arranged as a hollow cylinder, the hollow cylinder body is not provided with a wall plate on the front side of the rear part of the automobile cargo box, the whole surface is open, and four of the left link member and the right link member are provided.
  • the connecting rod is located on the same side of the rear pillar Inside the cavity.
  • the four-bar linkage mechanism can rotate around the shaft, shrink in the hollow cavity of the left front pillar 1 and the right front pillar 2, and the open sides of the two front pillars and the two rear pillars are docked Engage.
  • the left rear pillar 7 as shown in FIG. 1 can be completely stuck in the hollow cavity of the left front pillar 1 to form a closed body.
  • the cylinder
  • the two side plates of the left rear pillar 7 and the two side plates of the left front pillar 1 are respectively staggered and inserted into the hollow cavity of the opposite column to form a closed cylinder; or, the left front pillar 1 is entirely stuck to the left rear Inside the hollow cavity of the column 7, a closed cylinder is formed.
  • the butt engagement manner of the right front pillar 2 and the right rear pillar 8 is the same as that of the left front pillar 1 and the left rear pillar 7 .
  • the cargo board 17 at this time is flush with the floor of the automobile container, and the goods on the loading board 17 can be easily placed in the automobile container.
  • the left rear pillar 7 and the right rear pillar 8 are rotatably connected with the cargo board 17, and a left zipper 9 and a right zipper 10 are respectively disposed between the two rear pillars and the cargo board 17.
  • the left zipper 9 is taken as an example.
  • One end of the left zipper 9 is connected to the top end of the left rear pillar 7, and the other end is connected to the distal end of the side wall of the same side of the left rear pillar 7, and the left zipper 9 can be It is a connecting piece with a certain load-bearing strength such as a wire rope, and the length of the left zipper 9 can satisfy the level of the loading plate 17.
  • the loading board 17 can be loaded when the cargo loading and unloading is completed. Pulled to the vertical position so as to be close to and connected to the rear side panels of the two rear pillars, the carrier board 17 is used as the rear envelope of the automobile container, and only needs to meet the length of the loading board 17 along the longitudinal direction of the frame. It can be less than the height of the car's cargo box. This kind of structural arrangement not only improves the compactness of the whole mechanism, but also saves raw materials and reduces the weight of the car.
  • the hydraulic lifting tailgate mechanism of the embodiment further comprises a control unit, the schematic diagram of which is shown in FIG. 3, the control unit is provided with a lifting controller, which is connected with the gear pump, and can control the gear pump by operating the control button of the lifting controller Turning on or off, and then driving the cargo board to lift. Tooth
  • the positive pole of the motor of the wheel pump is connected to the positive pole of the battery of the vehicle, the negative pole of the gear pump is grounded, and a switch K is arranged between the gear pump and the battery and the starter, and the switch K is closed, so that the gear pump can be connected to the battery and the starter respectively.
  • the battery is powered by the motor of the gear pump, and the motor of the gear pump is started by the starter machine, and then the lifting controller is operated, and the hydraulic tail plate lifting mechanism can act accordingly.
  • the switch K is turned off, the motor of the gear pump is stopped and the power is turned off. At this time, the operation of the lifting controller is invalid, and the hydraulic lifting tailgate mechanism does not work.
  • the embodiment of the present invention can realize the lifting and lowering of the lifting and tailing plate unit by using the hydraulic driving unit to drive the connecting rod unit, the structure is simple, the weight is light, the production cost is low, and the manufacturing process is simple, and the common connection method is adopted. It can be installed on the original flat container car, and the cargo handling can be realized by one person operation control unit, which reduces the labor intensity and improves the operational efficiency of the truck.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Loading Or Unloading Of Vehicles (AREA)

Abstract

一种液压升降尾板机构，包括液压驱动单元、升降尾板单元和将液压驱动单元与升降尾板单元相连接的连杆单元；其中，液压驱动单元设置在汽车货箱后部，并包括油箱（15）、液压泵（16）、左液压油缸（3）和右液压油缸（4），液压泵（16）和油箱（15）连接并且设置在汽车货箱底板下方，左液压油缸（3）和右液压油缸（4）分别设置在汽车货箱后部两侧，并与液压泵（16）连接；左液压油缸（3）的液压连杆（5）和右液压油缸（4）的液压连杆（6）与连杆单元连接。通过液压驱动单元驱动连杆单元即能实现升降尾板单元的升降，结构简单，一人操作控制单元就能实现货物的装卸，降低了劳动强度。

Description

液压升降尾板机构 技术领域
本发明涉及汽车车身结构， 特别是涉及一种用于将货物从地面搬运至 汽车货箱底板上或将汽车货箱的货物搬运至地面上的液压升降尾板机构。 背景技术
现有的带有平板货箱的汽车， 在进行货物装卸时， 通常需要多名操作 人员通过人工搬运的方式， 将货物从货箱搬运至地面， 或者将货物从地面 搬运至货箱， 人工劳动强度很大。
现有技术中， 也有在平板货箱上设置自动升降货物的机构， 大多结构 复杂， 占用空间较大， 明显增加汽车承载重量， 降低载货汽车的运营效率。 发明内容
(一） 要解决的技术问题
本发明要解决的技术问题是在保证汽车结构简化、 紧凑的前提下， 降 低载货汽车装卸货物的劳动强度。
(二） 技术方案
为了解决上述技术问题， 本发明提供一种液压升降尾板机构， 该液压 升降尾板机构包括液压驱动单元、 升降尾板单元和将所述液压驱动单元与 升降尾板单元相连接的连杆单元； 其特征在于， 所述液压驱动单元设置在 汽车货箱后部， 并包括油箱、 液压泵、 左液压油缸和右液压油缸， 所述液 压泵和油箱连接并且设置在汽车货箱底板下方， 所述左液压油缸和右液压 油缸分别设置在汽车货箱后部两侧， 并与所述液压泵连接； 所述左液压油 缸的液压连杆和右液压油缸的液压连杆与所述连杆单元连接。 优选地， 所述液压驱动单元驱动所述连杆单元进行伸缩运动， 以所述 连杆单元靠近汽车货箱为收缩， 连杆单元远离汽车货箱为伸展； 所述连杆 单元设置在汽车货箱后部， 并与升降尾板单元相连， 带动升降尾板单元上 下运动， 所述连杆单元收缩时， 所述升降尾板单元上升， 所述连杆单元伸 展时， 所述升降尾板单元下降。
优选地， 所述汽车货箱后部两侧均设置有前立柱， 所述前立柱为中空 柱体， 且前立柱面向升降尾板单元的一侧具有开口； 所述左液压油缸和右 液压油缸分别安装在与其同侧的前立柱内。
优选地， 所述连杆单元包括结构相同的左连杆件和右连杆件； 左、 右 连杆件分别设置在汽车货箱后部两侧， 且均包括至少一根连杆， 所述连杆 一端与汽车货箱后部可转动连接， 另一端与升降尾板单元可转动连接， 所 述左液压油缸和右液压油缸分别与其同侧的一根连杆连接。
优选地， 所述升降尾板单元包括载货板， 载货板两侧分别设置有与载 货板垂直的后立柱， 所述左连杆件和右连杆件分别与其同侧的后立柱可转 动连接； 所述连杆单元收缩后， 所述载货板与汽车货箱底板相平， 所述连 杆单元伸展后， 所述载货板与地面相平。
优选地， 所述升降尾板单元还包括设置在载货板两侧的拉链， 所述拉 链一端与后立柱顶端连接， 另一端与其同侧的载货板侧壁连接。
优选地， 所述载货板与所述后立柱可转动连接。
优选地， 所述载货板沿车架纵梁方向的长度不小于汽车货箱的高度。 优选地， 所述后立柱为中空柱体， 且后立柱面向前立柱的一侧具有开 口， 当连杆单元收缩且载货板与汽车货箱底板相平时， 前立柱与其同侧的 后立柱对接卡合。
优选地， 该液压升降尾板机构还包括控制单元， 该控制单元与所述液 压泵连接， 控制液压泵的开启或关闭。
(三） 有益效果 上述技术方案所提供的液压升降尾板机构， 使用液压驱动单元驱动连 杆单元即能实现升降尾板单元的升降， 结构简单， 重量轻， 生产成本低； 液压驱动单元的布置方式使得整个液压升降尾板机构的占用空间较小， 结 构紧凑 ,· 并且制作工艺简单， 采用常用的连接方式即可加装在原有平板货 箱汽车上， 通过一人操作控制单元能实现货物的装卸， 降低了劳动强度， 提高了载货汽车的运营效率。 附图说明
图 1是本发明实施例的液压升降尾板机构的结构示意图；
图 2是图 1的左侧视图；
图 3是本发明实施例中液压升降尾板机构的控制单元结构简图。
其中， 1 : 左前立柱； 2: 右前立柱； 3 : 左液压油缸； 4: 右液压油缸； 5： 左液压连杆； 6: 右液压连杆； 7: 左后立柱； 8 : 右后立柱； 9: 左拉链； 10： 右拉链； 11 : 左高压油管； 12: 右高压油管； 13 : 左后尾灯板； 14: 右后尾灯板； 15 : 油箱； 16: 齿轮泵； 17: 载货板； 18: 左上连杆； 19: 左下连杆； K: 开关。 具体实施方式
下面详细描述本发明的实施例， 所述实施例的示例在附图中示出， 其 中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功 能的元件。 下面通过参考附图描述的实施例是示例性的， 仅用于解释本发 明， 而不能理解为对本发明的限制。
在本实施例的描述中， 需要理解的是， 术语"中心"、 "纵向"、 "横向"、 "上"、 "下"、 "前"、 "后"、 "左"、 "右"、 "竖直"、 "水平"、 "顶"、 "底"、 "内"、 "外"等指示的方位或位置关系为基于附图所示的方位或位置关系， 仅是为了便于描述本实施例和简化描述， 而不是指示或暗示所指的装置或 元件必须具有特定的方位、 以特定的方位构造和操作， 因此不能理解为对 实施例的限制。
此外， 术语 "第一"、 "第二"仅用于描述目的， 而不能理解为指示或 暗示相对重要性。
在本实施例的描述中， 需要说明的是， 除非另有明确的规定和限定， 术语 "安装"、 "相连"、 "连接"应做广义理解， 例如， 可以是固定连接， 一体地连接， 也可以是可拆卸连接； 可以是直接相连， 也可以通过中间媒 介间接相连， 对于本领域的普通技术人员而言， 可以根据具体情况理解上 述术语的具体含义。
下面参考附图描述根据本实施例的液压升降尾板机构。
图 1示出了本实施例液压升降尾板机构的结构示意图，图 1是基于图 1 的左侧视图。 由图可以看出， 液压升降尾板机构包括液压驱动单元、 连杆 单元和升降尾板单元， 整个机构安装在汽车货箱后部， 由液压驱动单元驱 动连杆单元伸缩， 在此， 以连杆单元靠近汽车货箱为收縮， 连杆单元远离 汽车货箱为伸展； 再由连杆单元带动升降尾板单元升降， 将装卸的货物放 置在升降尾板单元上， 实现快捷便利的货物装卸。
本实施例中， 汽车货箱没有设置后盖板， 液压驱动单元设置在汽车货 箱后部， 液压驱动单元具体包括油箱 15和液压泵 （该液压泵可以采用各种 类型， 例如齿轮泵、 叶片泵、 柱塞泵等， 在本实施例中为齿轮泵 16)， 两者 可以采用一体式设置， 安装在汽车货箱底板下方， 由支架支撑， 支架上还 设置有左后尾灯板 13、 右后尾灯板 14和车牌等辅助部件。 齿轮泵 16产生 的高压油通过高压油管传递给液压油缸， 在汽车货箱两侧板后部分别设置 了左液压油缸 3和右液压油缸 4，齿轮泵 16通过左高压油管 11与左液压油 缸 3连接， 齿轮泵 16通过右高压油管 12与右液压油缸 4连接。
在汽车货箱两侧板后部分别设置有左前立柱 1和右前立柱 2，两立柱均 为中空柱体， 且两立柱的后部侧板上均具有开口。 左液压油缸 3 和右液压 油缸 4分别设置在左前立柱 1和右前立柱 2的中空腔体内， 既能提高整个 部件结构的紧凑性， 又能避免液压油缸暴露在外部而影响整体美观。
本实施例的连杆单元包括结构完全相同的左连杆件和右连杆件， 左连 杆件包括两根平行设置的连杆， 分别为左上连杆 18和左下连杆 19， 两根上 连杆间隔设置， 分别与左前立柱 1可转动连接。 左液压油缸 3的左液压连 杆 5与左上连杆 18连接， 左液压油缸 3活塞的运动， 通过左液压连杆 5带 动左上连杆 18运动。 类似地， 右连杆件也包括两根平行设置的连杆 （图中 未示出），该两根连杆分别与左上连杆 18和左下连杆 19位于同一水平面上， 且该两根连杆分别与右前立柱 2可转动连接。右液压油缸 4的右液压连杆 6 与右上连杆连接， 右液压油缸 4的活塞与左液压油缸 3的活塞同时运动， 通过右液压连杆 6带动右上连杆运动。 左连杆件和右连杆件形成的四连杆 机构带动升降尾板单元平稳升降。
具体地， 升降尾板单元包括载货板 17和设置在载货板 17两侧的左后 立柱 Ί和右后立柱 8，左连杆件所包含的左上连杆 18和左下连杆 19的另一 端分别与左后立柱 7可转动连接， 右连杆件所包含的右上连杆和右下连杆 的另一端分别与右后立柱 8 可转动连接。 四连杆机构通过带动左后立柱 7 和右后立柱 8来带动载货板 17的升降。 四连杆机构与左后立柱 7和右后立 柱 8的结构和位置关系， 能够满足连杆单元收缩时， 后立柱 7和右后立柱 8 带动载货板 17上升， 最终使载货板 17与汽车货箱底板相平， 便于通过载 货板 17将货物由地面装至货箱内； 当连杆单元伸展时， 后立柱 7和右后立 柱 8带动载货板 17下降， 最终使载货板 17与地面相平， 便于通过载货板 17将货物由汽车货箱卸下。
为了便于本实施例的液压升降尾板机构在工作结束之后不占用太多空 间， 本实施例通过以下结构设置来实现该效果。 左后立柱 7和右后立柱 8 也设置为中空柱体， 该中空柱体面向汽车货箱后部的前侧没有设置壁板， 整面开口， 左连杆件和右连杆件的四根连杆分别位于其同侧的后立柱中空 腔体内。 当液压驱动单元带动四连杆机构收缩时， 四连杆机构能够分别绕 轴旋转， 收缩在左前立柱 1和右前立柱 2的中空腔体内， 并且两根前立柱 和两根后立柱的开口侧对接卡合。 具体地， 根据前立柱和后立柱的开口宽 度以及前、后立柱之间的相对位置关系， 可以实现如图 1所示的左后立柱 7 整个卡在左前立柱 1 的中空腔体内， 形成一个封闭的柱体。 或者， 左后立 柱 7的两侧板与左前立柱 1 的两侧板分别交错， 彼此穿插进相对立柱的中 空腔体内， 形成一个封闭的柱体； 再或者， 左前立柱 1整个卡在左后立柱 7 的中空腔体内， 形成一个封闭的柱体。 右前立柱 2和右后立柱 8的对接卡 合方式与左前立柱 1和左后立柱 7的对接卡合方式相同。 并且， 此时的载 货板 17与汽车货箱底板相平， 能够轻松地将载货板 17上的货物放置在汽 车货箱内。
本实施例中， 左后立柱 7和右后立柱 8与载货板 17之间可转动连接， 并且在两后立柱与载货板 17之间分别设置了左拉链 9和右拉链 10。因两侧 拉链的设置结构相同， 以左拉链 9为例进行描述， 左拉链 9一端与左后立 柱 7顶端连接， 另一端与左后立柱 7同侧的侧壁远端连接， 左拉链 9可以 是钢丝绳等具有一定承重强度的连接件， 左拉链 9的长度以满足载货板 17 水平即可。
因左前立柱 1和左后立柱 7、右前立柱 2和右后立柱 8分别紧密对接卡 合， 且载货板 17与汽车货箱底板相平， 所以在完成货物装卸时， 可以将载 货板 17拉至竖直位置， 使其与两后立柱的后侧板相贴近并连接， 由载货板 17作为汽车货箱后封板，只需满足载货板 17沿车架纵梁方向的长度不小于 汽车货箱的高度即可， 该种结构设置既提高了整个机构的紧凑性， 又节省 了原料， 降低车重。
本实施例的液压升降尾板机构还包括控制单元， 其结构简图如图 3所 示， 该控制单元设置有升降控制器， 与齿轮泵连接， 通过操作升降控制器 的控制按钮能够控制齿轮泵的开启或关闭， 进而带动载货板进行升降。 齿 轮泵的电机正极与整车蓄电池的正极相连， 齿轮泵的电极负极接地， 在齿 轮泵与蓄电池和启动机之间设置有开关 K, 开关 K闭合， 能够使齿轮泵与 蓄电池和启动机分别连通， 由蓄电池为齿轮泵的电机供电， 由启动机将齿 轮泵的电机启动工作， 接下来再操作升降控制器， 液压尾板升降机构可相 应动作。 在停止液压升降尾板机构的动作时， 断开开关 K， 齿轮泵的电机 停止并断电， 此时操作升降控制器无效， 液压升降尾板机构不工作。
由以上实施例可以看出， 本发明实施例使用液压驱动单元驱动连杆单 元即能实现升降尾板单元的升降， 结构简单， 重量轻， 生产成本低； 并且 制作工艺简单， 采用常用的连接方式即可加装在原有平板货箱汽车上， 通 过一人操作控制单元能实现货物的装卸， 降低了劳动强度， 提高了载货汽 车的运营效率。
以上所述仅是本发明的优选实施方式， 应当指出， 对于本技术领域的 普通技术人员来说， 在不脱离本发明技术原理的前提下， 还可以做出若干 改进和替换， 这些改进和替换也应视为本发明的保护范围。

Claims

权利要求
1、 液压升降尾板机构， 该液压升降尾板机构包括液压驱动单元、 升降 尾板单元和将所述液压驱动单元与升降尾板单元相连接的连杆单元； 其特 征在于， 所述液压驱动单元设置在汽车货箱后部， 并包括油箱、 液压泵、 左液压油缸和右液压油缸， 所述液压泵和油箱连接并且设置在汽车货箱底 板下方， 所述左液压油缸和右液压油缸分别设置在汽车货箱后部两侧， 并 与所述液压泵连接； 所述左液压油缸的液压连杆和右液压油缸的液压连杆 与所述连杆单元连接。
2、 如权利要求 1所述的液压升降尾板机构， 其特征在于， 所述液压驱 动单元驱动所述连杆单元进行伸缩运动， 以所述连杆单元靠近汽车货箱为 收缩， 连杆单元远离汽车货箱为伸展，· 所述连杆单元设置在汽车货箱后部， 并与升降尾板单元相连， 带动升降尾板单元上下运动， 所述连杆单元收缩 时， 所述升降尾板单元上升， 所述连杆单元伸展时， 所述升降尾板单元下 降。
3、 如权利要求 2所述的液压升降尾板机构， 其特征在于， 所述汽车货 箱后部两侧均设置有前立柱， 所述前立柱为中空柱体， 且前立柱面向升降 尾板单元的一侧具有开口； 所述左液压油缸和右液压油缸分别安装在与其 同侧的前立柱内。
4、 如权利要求 3所述的液压升降尾板机构， 其特征在于， 所述连杆单 元包括结构相同的左连杆件和右连杆件； 左、 右连杆件分别设置在汽车货 箱后部两侧， 且均包括至少一根连杆， 所述连杆一端与汽车货箱后部可转 动连接， 另一端与升降尾板单元可转动连接， 所述左液压油缸和右液压油
5、 如权利要求 4所述的液压升降尾板机构， 其特征在于， 所述升降尾 板单元包括载货板， 载货板两侧分别设置有与载货板垂直的后立柱， 所述 左连杆件和右连杆件分别与其同侧的后立柱可转动连接； 所述连杆单元收 缩后， 所述载货板与汽车货箱底板相平， 所述连杆单元伸展后， 所述载货 板与地面相平。
6、 如权利要求 5所述的液压升降尾板机构， 其特征在于， 所述升降尾 板单元还包括设置在载货板两侧的拉链， 所述拉链一端与后立柱顶端连接， 另一端与其同侧的载货板侧壁连接。
7、 如权利要求 6所述的液压升降尾板机构， 其特征在于， 所述载货板 与所述后立柱可转动连接。
8、 如权利要求 6所述的液压升降尾板机构， 其特征在于， 所述载货板 沿车架纵梁方向的长度不小于汽车货箱的高度。
9、 如权利要求 5所述的液压升降尾板机构， 其特征在于， 所述后立柱 为中空柱体， 且后立柱面向前立柱的一侧具有开口， 当连杆单元收缩且载 货板与汽车货箱底板相平时， 前立柱与其同侧的后立柱对接卡合。
10、 如权利要求 1 所述的液压升降尾板机构， 其特征在于， 该液压升 降尾板机构还包括控制单元， 该控制单元与所述液压泵连接， 控制液压泵 的开启或关闭。
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