WO2009065288A1 - Ecrou de sollicitation de support de semi-remorque - Google Patents

Ecrou de sollicitation de support de semi-remorque Download PDF

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Publication number
WO2009065288A1
WO2009065288A1 PCT/CN2008/001010 CN2008001010W WO2009065288A1 WO 2009065288 A1 WO2009065288 A1 WO 2009065288A1 CN 2008001010 W CN2008001010 W CN 2008001010W WO 2009065288 A1 WO2009065288 A1 WO 2009065288A1
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WO
WIPO (PCT)
Prior art keywords
nut
layer
semi
cylinder
lower layer
Prior art date
Application number
PCT/CN2008/001010
Other languages
English (en)
French (fr)
Inventor
Zhiqiang Wu
Shaofan Zeng
Xiangyong Zhong
Original Assignee
Guangdong Fuwa Engineering Manufacturing Co., Ltd.
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 CNA2007100316748A external-priority patent/CN101168363A/zh
Priority claimed from CN2008100278488A external-priority patent/CN101269654B/zh
Application filed by Guangdong Fuwa Engineering Manufacturing Co., Ltd. filed Critical Guangdong Fuwa Engineering Manufacturing Co., Ltd.
Priority to EP08748531.4A priority Critical patent/EP2223830A4/en
Priority to US12/744,153 priority patent/US8622677B2/en
Publication of WO2009065288A1 publication Critical patent/WO2009065288A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
    • B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
    • B60S9/04—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting mechanically
    • B60S9/06—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting mechanically of screw-and-nut type
    • B60S9/08—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting mechanically of screw-and-nut type the screw axis being substantially vertical

Definitions

  • the invention relates to a semi-trailer leg supporting nut, in particular to a bearing nut matched with a screw rod for lifting and adjusting a semi-trailer leg.
  • legs Semi-trailer support device (legs), including external legs mounted on the left and right sides of the front section of the semi-trailer, inner legs that can be extended up and down in the outer legs, screw nut assemblies that connect the inner and outer legs and transmit loads, two-speed gear transmission Mechanism, crank handle and intermediate shaft connecting the left and right legs.
  • screw nut for optimizing the load transmission is optimized.
  • the design is also a key.
  • the common design of the common screw nut is the use of a spherical nut or a semi-circular boss nut or a grooved suspension nut on both sides. These nuts have their own characteristics, and can finely adjust the coaxiality of the two axes of the screw nut, such as The applicant has adopted this similar nut in Chinese patent 99236524. 4 (name: semi-trailer support device), and has obtained the patent number 200520064422 for this similar nut. Chinese utility model patent for the screw nut of the trailer support device. However, these nuts are of a single-layer structure. When the screw is rotated, the nut has only a single layer of corners that are in contact with the inner wall of the square tube, and the other parts of the nut are suspended.
  • the object of the present invention is to overcome the deficiencies of the prior art and provide a semi-trailer leg bearing nut with reasonable structure, stable bearing work, high lifting capacity, flexible full-load operation, low manufacturing cost and long service life.
  • a semi-trailer leg bearing nut comprising a threaded hole on the nut cylinder and communicating with the two ends of the nut, wherein the nut is a two-layer structure composed of an upper layer and a lower layer or a three-layer structure composed of an upper layer, an intermediate layer and a lower layer, and the nut has at least two outer corridors. All squares with the same chamfered angle, the sides of the two squares are equal in length, the projections of the outer contour edges in the cylinder axis direction coincide, and the projection of the outer contour line of the other layer along the cylinder axis direction is coincident projection on the two layers.
  • the upper layer of the nut is provided with a funnel-shaped oil cup or an oil storage groove that communicates with the threaded hole.
  • the bottom surface of the lower layer of the nut is a flat surface and is pressed against a carrier plate in the square tube to transmit a load.
  • a reinforcing rib is disposed between the cylinder of the nut and the lower layer.
  • the rib is triangular, one side of the triangle is connected to the column, and the other side is connected to the lower layer.
  • the reinforcing rib is quadrangular, the top edge of the quadrilateral is connected with the upper layer or the intermediate layer, the bottom edge is connected with the lower layer, and one side is connected with the column body.
  • the chamfer angle is a straight cut angle or a circular cut angle.
  • the invention Compared with the prior art semi-trailer leg bearing nut, the invention has the beneficial effects that: the invention designs the nut as a square structure of upper and lower layers or upper, middle and lower layers, and the nut has at least two layers.
  • the contours are all squares with the same chamfer angle.
  • the sides of the two squares are equal in length, the projections of the outer contour edges in the cylinder axis direction coincide, and the projection of the outer contour line of the other layer along the cylinder axis direction is coincident in the two layers.
  • the two layers of the nut projection coincide with a total of 8 angles. At least 5 to 6 are simultaneously in contact with the inner wall of the square tube, increasing the ability of the nut to resist the rotational torque.
  • the upper layer of the nut is provided with a funnel-shaped oil cup or oil storage groove.
  • the bottom surface of the lower layer of the nut is flat, and is placed on the plane of the carrier plate to transmit the load.
  • the nut remains stable and the lifting capacity of the leg is improved.
  • There is no vibration, there is basically no noise, the threaded rod and the nut are effectively meshed with a large number of threads, the thread is evenly stressed, the actual stress is low, the wear is less, and the full load operation is flexible.
  • reinforcing ribs are arranged between the upper and lower layers of the nut or between the lower layer and the intermediate layer, which not only effectively reduces the weight of the entire nut, but also maintains the overall strength and rigidity of the nut and prolongs the service life of the product.
  • the nut of the invention can maintain stable operation, no vibration, no noise (test is 50 ⁇ 60db), and the lifting capacity of the leg is increased by about 15% ⁇ 20%, which does not occur. Thread deformation phenomenon, very little wear, after the test, the screw rod is flexible and flexible in the nut, all passed the AAR test.
  • Figure 1 is a front elevational view showing the preferred embodiment of the present invention.
  • Figure 2 is a schematic plan view of the top view of Figure 1.
  • Figure 3 is a cross-sectional structural view taken along line A-A of Figure 2;
  • Figure 4 is a perspective structural view of a preferred embodiment of the present invention.
  • Figure 5 is a cross-sectional view showing the state of use of the preferred embodiment of the present invention.
  • Figure 6 is a front elevational view showing another embodiment of the present invention.
  • Figure 7 is a top plan view of Figure 6.
  • Figure 8 is a cross-sectional structural view taken along line B-B of Figure 7;
  • Figure 9 is a perspective structural view of the embodiment of Figure 6.
  • Figure 10 is a cross-sectional structural view showing a third embodiment of the present invention, the cross-sectional direction of which is shown in the A-A direction of Figure 2 .
  • Figure 11 is a cross-sectional structural view showing a fourth embodiment of the present invention, the cross-sectional direction of which is shown in the A-A direction of Figure 2.
  • 1 is the cylinder
  • 2 is the threaded hole
  • 3 is the upper layer
  • 4 is the lower layer
  • 4 is the lower layer
  • 5 is the funnel-shaped oil cup
  • 5 is the oil storage groove
  • 6 is the intermediate layer
  • 7 is the reinforcing rib
  • 8 is the square tube
  • 9 is the carrying board
  • 10 is the chamfering angle.
  • this embodiment is a preferred embodiment of a semi-trailer leg bearing nut which includes a threaded bore 2 disposed on the nut cylinder 1 and communicating the ends of the nut.
  • the nut is a two-layer structure consisting of an upper layer 3 and a lower layer 4, both of which are squares having the same chamfer 10, the sides of the square are equal in length, and the projections of the outer rims of the two layers coincide in the axial direction of the cylinder 1 .
  • the cut angle 10 of the square is a straight cut angle to avoid the rounded position of the square square tube 8.
  • the double-layered square nut has a total of 8 angles of at least 5 to 6 and simultaneously contacts the inner wall of the square tube 8, increasing the ability of the nut to resist the rotational torque.
  • the upper layer 3 of the nut is provided with a funnel-shaped oil cup 5 communicating with the threaded hole 2.
  • the grease in the bucket-shaped oil cup 5 is brought into the thread movement pair with the rotation of the screw rod, which effectively reduces the friction force and makes the transmission of the screw nut more flexible.
  • the lower layer of the nut 4 has a flat bottom surface and is pressed against the carrier plate 9 in the square tube 8 to transmit a load.
  • the lower end of the nut cylinder 1 extends into the center hole of the carrier plate 9, which increases the length of the nut cylinder 1. In the case where the upper and lower layers are short, the nut can be sufficiently supported to carry the number of engaging screws.
  • a reinforcing rib 7 is provided between the upper layer 3 and the lower layer 4 of the nut.
  • the rib 7 of the present embodiment has a triangular shape, one side of the triangle is connected to the column 1 and the other side is connected to the lower layer 4, which effectively reduces the weight of the entire nut and maintains the overall strength and rigidity of the nut.
  • the number of ribs 7 is four, and the rings are evenly distributed, facing the four corners of the square.
  • this embodiment is another embodiment of a semi-trailer leg bearing nut.
  • the basic structure is the same as that of the first embodiment, and is omitted here. The difference is:
  • angles set by the four corners of the upper layer 3 and the lower layer 4 of the nut are arc-cut angles, also to avoid the rounded position of the square square tube 8.
  • the reinforcing ribs 7 between the upper layer 3 and the lower layer 4 are quadrilateral, the number is eight, and the circumferential direction is evenly distributed.
  • the four reinforcing ribs 7 between the four sides are opposite to the four chamfered corners, and the top edge of the reinforcing rib 7 is connected with the upper layer 3, and the bottom edge Connected to the lower layer 4, one side is connected to the column 1.
  • the upper layer 3 of the nut is provided with an oil storage groove 5 communicating with the threaded hole 2, and the oil storage groove 5 is a four-sided arc groove structure, and the upper end of the curved groove extends to the square of the upper end surface of the nut.
  • Third embodiment
  • this embodiment is a third embodiment of a semi-trailer leg bearing nut.
  • the basic structure of this embodiment is the same as that of the first embodiment, and is omitted here. The difference is:
  • the nut of the embodiment is a three-layer structure consisting of an upper layer 3, an intermediate layer 6, and a lower layer 4.
  • the three layers are squares with the same chamfer 10, the three sides of the square have the same side length, and the outer contour is along the axis of the cylinder 1
  • the rib 7 is disposed between the cylinder 1 and the lower layer 4, and the rib 7 is identical to the embodiment 1, and will not be described here. Due to the three-layer structure, the nut cylinder 1 is long and has a sufficient number of meshing teeth, and the cylinder 1 does not have to extend downward.
  • the intermediate layer 6 may be small, a square with a chamfer 10, or a circular or other shape whose outer contour is projected in the direction of the axis of the cylinder 1 within the coincident projection of the two layers.
  • the present embodiment is a fourth embodiment of a semi-trailer leg bearing nut.
  • the basic structure of this embodiment is the same as that of the third embodiment, and is omitted here. The slight difference is:
  • the intermediate layer 6 and the lower layer 4 are squares having the same chamfer angle 10, the two layers are equal in length, and the outer contours are projected and coincided along the axial direction of the cylinder 1, and the intermediate layer 6 is adjacent.
  • the upper layer 3 is smaller, which is a square with a chamfer 10, and may also be a circular or other shape whose outer contour is projected in the direction of the cylinder 1 in the coincident projection of the two layers.
  • the upper layer 3 does not contact the inner wall of the square tube 8; the intermediate layer 6 and the lower layer 4 have a total of 8 angles of at least 5 to 6 and simultaneously contact the inner wall of the square tube 8, increasing the ability of the nut to resist the rotational torque.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Description

一种半挂车支腿承载螺母 技术领域
本发明涉及一种半挂车支腿承载螺母， 具体说是一种半挂车支腿升降调 节用的与丝杆相配的承载螺母。 背景技术
在半挂车前段左右边梁的外侧通常配设有升降支腿， 以支承半挂车的前 半段重量， 并可调节半挂车前端的高度， 适应牵引座的进入或脱离； 在半挂 车被牵引行驶时， 内腿缩回， 升离地面， 保持安全距离。
半挂车支承装置（支腿）， 包括安装在半挂车前段左、 右两侧的外腿、 可 在外腿内上下伸缩的内腿， 连接内外腿并传递载荷的丝杆螺母组件， 双速齿 轮传动机构、 摇柄以及连接左右腿的中间轴。 为保证支腿的质量， 除了优化 产品制造过程， 确保外腿中心线与支承垫中心孔的同轴度和内腿中心线与承 载板中心孔的同轴度外， 优化传递载荷的丝杆螺母的设计也是一个关键。
常见的丝杆螺母传统设计是采用球面螺母或两侧半圓凸台螺母或沟槽悬 挂式螺母等结构， 这些螺母均具有各自的特点， 都可以微调丝杆螺母两轴线 的同轴度问题， 如本申请人曽经在中国专利 99236524. 4 (名称为： 半挂车支 承装置）就采用过这种类似的螺母， 也曽经就这种类似的螺母获得了专利号 为 200520064422. 1、 名称为半挂车支承装置的丝杆螺母的中国实用新型专 利。 但是这些螺母都是单层结构， 在丝杆转动时， 螺母只有单层边角与方管 的内壁接触， 螺母的其它部位悬空， 在转动扭矩作用下， 不能保持螺母稳定， 因而降低了支腿的举升能力， 丝杆螺母实际有效啮合的螺牙数减少， 螺纹所 受的弯矩和剪力增加。按照美国标准（AAR )实验证明： 实验时容易发生振动， 发出较大的噪声（80 ~ 85db )， 其螺紋容易产生变形， 甚至丝杆和螺母之间出 现卡死， 导致实验失败（失败率 20 % ~ 25 % , 甚至更高）。 经多年的实贱证 明， 常见的传统设计的螺母在使用中螺纹容易产生变形， 甚至丝杆螺母之间 出现卡死， 转动困难， 直接影响其使用寿命。 发明内容
本发明的目的在于克服现有技术的不足， 提供一种结构合理、 承载工作 稳定、 举升能力高、 满载操作灵活、 制作成本低、 使用寿命长的半挂车支腿 承载螺母。
本发明的发明目的是这样实现的： 一种半挂车支腿承载螺母， 包括设于 螺母柱体上且连通螺母两端的螺纹孔， 其特征在于： 所述螺母为由上层、 下 层组成的二层结构或由上层、 中间层、 下层组成的三层结构， 螺母至少有两 层外轮廊均为带相同切角的正方形， 这两层正方形的边长相等， 其外轮廓边 沿柱体轴线方向的投影重合， 另一层的外轮廓线沿柱体轴线方向的投影在两 层的重合投影以内。
所述螺母的上层设有与螺纹孔连通的漏斗状油杯或储油凹槽。
所述螺母的下层底面为平面， 并坐压在方管内的承载板上以传递载荷。 所述螺母的柱体与下层之间设有加强筋。
所述加强筋为三角形， 三角形的一边与柱体连接， 另一边与下层连接。 所述加强筋为四边形， 四边形的顶边与上层或中间层连接， 底边与下层 连接， 一侧边与柱体连接。
所述切角为直线切角或圓弧切角。
本发明与现有技术的半挂车支腿承载螺母相比 , 具有益效果在于： 本发明将螺母设计为上、 下两层或上、 中、 下三层的正方形结构， 螺母 至少有两层外轮廓均为带相同切角的正方形， 这两层正方形的边长相等， 其 外轮廓边沿柱体轴线方向的投影重合， 另一层的外轮廓线沿柱体轴线方向的 投影在两层的重合投影以内。 丝杆转动时， 螺母投影重合的两层共计 8个角 至少 5 ~ 6处同时与方管的内壁接触，增加螺母抵抗转动扭矩的能力。螺母的 上层设有漏斗状油杯或储油凹槽， 螺母的下层底面为平面， 坐压在承载板平 面上， 传递载荷， 重载举升时， 螺母保持稳定， 提高支腿的举升能力， 不发 生振动， 基本没有噪声， 丝杆和螺母的有效啮合的螺牙数多， 螺纹受力均匀， 实际应力较低， 磨损较少， 满载操作灵活。 同时， 在螺母的上下两层或者下 层、 中间层之间还设有加强筋， 既有效减轻整个螺母的重量， 又可保持螺母 的整体强度和刚度， 延长产品的使用寿命。 按美国标准 AR )试验证明： 本 发明的螺母能保持工作稳定， 不发生振动， 基本不发生噪声 （试验为 50 ~ 60db ), 支腿的举升能力提高约有 15 % ~ 20 %， 没有发生螺纹变形现象， 磨 损甚少， 试验后， 丝杆在螺母中转动灵活自如， 全部通过 AAR试验。 附图说明
附图 1为本发明最佳实施例的主视结构示意图。
附图 2为图 1的俯视结构示意图。
附图 3为图 2的 A-A方向剖视结构图。
附图 4为本发明最佳实施例的立体结构图。
附图 5为本发明最佳实施例的使用状态剖视图。 附图 6为本发明另一实施例的主视结构图。
附图 7为图 6的俯视结构图。
附图 8为图 7的 B-B方向剖面结构图。
附图 9为图 6实施例的立体结构图。
附图 10为本发明第三实施例的剖面结构示意图， 其剖视方向如图 2 的 A-A方向。
附图 11 为本发明第四实施例的剖面结构示意图， 其剖视方向如图 2 的 A-A方向。
图中： 1为柱体， 2为螺纹孔， 3为上层， 4为下层， 5为漏斗状油杯， 5， 为储油凹槽， 6为中间层， 7为加强筋， 8为方管， 9为承载板， 10为切 角。 具体实施方式
下面结合附图对本发明作进一步的描述。
第一实施例
参见图 1至图 5所示， 本实施例为半挂车支腿承载螺母的最佳实施例， 它包括设于螺母柱体 1上且连通螺母两端的螺纹孔 2。螺母为由上层 3、下层 4组成的二层结构， 两层均为带相同切角 10的正方形， 正方形边长相等， 且 两层的外轮廊边沿柱体 1轴线方向的投影重合。正方形的切角 10为直线切角， 以避开正方形方管 8的圓角位置。 在丝杆转动时， 双层正方形螺母， 共计 8 个角至少 5 ~ 6处同时与方管 8的内壁接触， 增加螺母抵抗转动扭矩的能力。
螺母的上层 3设有与螺纹孔 2连通的漏斗状油杯 5。 当螺母工作时， 漏 斗状油杯 5中的润滑脂， 随丝杆的转动而带入螺紋运动副，有效减小摩擦力， 使丝杆螺母的传动更为灵活自如。
螺母的下层 4底面为平面，并坐压在方管 8内的承载板 9上以传递载荷。 螺母柱体 1的下端延伸进入承载板 9的中心孔， 增长了螺母柱体 1的长度， 在上下层相距较短的情况下， 可有效保证螺母有足够的承载啮合螺牙数。
螺母的上层 3与下层 4之间设有加强筋 7。 本实施例的加强筋 7为三角 形， 三角形的一边与柱体 1连接， 另一边与下层 4连接， 有效减轻整个螺母 的重量， 又可保持螺母的整体强度和刚度。 加强筋 7的数量为四条， 环向均 布， 正对着正方形的四个切角处。 第二实施例
参见图 6至图 9所示， 本实施例为半挂车支腿承载螺母的另一实施例， 其基本结构和第一实施例一致， 在此省略不述， 稍有不同的是：
螺母上层 3和下层 4的四个角设置的切角为圆弧切角， 同样是为了避开 正方形方管 8的圓角位置。
上层 3与下层 4之间的加强筋 7为四边形， 数量为八条， 环向均布， 相 间的四条加强筋 7正对四个切角处， 加强筋 7的顶边与上层 3连接， 底边与 下层 4连接， 一侧边与柱体 1连接。
螺母的上层 3设有与螺纹孔 2连通的储油凹槽 5，， 储油凹槽 5， 为四边 弧形槽结构， 弧形槽的上端延伸到螺母的上端面正方形。 第三实施例
参见图 10所示，本实施例为半挂车支腿承载螺母的第三实施例，本实施 例的基本结构和第一实施例一样， 在此省略不述， 其不同点是：
本实施例的螺母为由上层 3、 中间层 6、 下层 4组成的三层结构， 三层均 为带相同切角 10的正方形，三层正方形边长相等，其外轮廓沿柱体 1轴线方 向投影重合， 丝杆转动时， 螺母三层均有可能与方管接触， 保持工作稳定， 增加螺母抵抗转动扭矩的能力。 加强筋 7设于柱体 1和下层 4之间， 加强筋 7与实施例 1一致， 在此省略不述。 由于三层结构， 螺母柱体 1较长， 有足 够的啮合牙数， 柱体 1不必向下延伸。
作为本实施例的衍生， 中间层 6可较小， 为带切角 10的正方形， 也可为 圆形或其它形状， 其外轮廓沿柱体 1轴线方向投影在两层的重合投影以内。 第四实施例
参见图 11所示，本实施例为半挂车支腿承载螺母的第四实施例，本实施 例的基本结构和第三实施例一样， 在此省略不述， 稍有一点不同的是：
本实施例虽也为三层结构，但中间层 6与下层 4为带有相同切角 10的正 方形， 两层边长相等， 其外轮廓沿柱体 1的轴线方向投影重合， 中间层 6靠 近柱体螺纹的上端。 而上层 3则较小， 为带切角 10的正方形， 也可为圓形或 其它形状， 其外轮廓沿柱体 1轴线方向投影在两层的重合投影以内。 丝杆转 动时， 上层 3与方管 8内壁不接触； 中间层 6和下层 4共计 8个角至少 5 ~ 6 处同时与方管 8的内壁接触， 增加螺母抵抗转动扭矩的能力。

Claims

权利 要求 书
1. 一种半挂车支腿承载螺母， 包括设于螺母柱体（ 1 )上且连通螺母两 端的螺纹孔 ( 2 )， 其特征在于： 所述螺母为由上层（ 3 )、 下层（ 4 )组成的二 层结构或由上层（3)、 中间层（6)、 下层（4)组成的三层结构， 螺母至少有 两层外轮廓均为带相同切角 （10) 的正方形， 这两层正方形的边长相等， 其 外轮廓边沿柱体（ 1 )轴线方向的投影重合， 另一层的外轮廓线沿柱体（ 1 ) 轴线方向的投影在两层的重合投影以内„
2. 根据权利要求 1所述的半挂车支腿承载螺母，其特征在于： 所述螺母 的上层（ 3 )设有与螺纹孔 ( 2 )连通的漏斗状油杯（ 5 )或储油凹槽（ 5，）。
3. 根据权利要求 1所述的半挂车支腿承载螺母，其特征在于： 所述螺母 的下层（4)底面为平面， 并坐压在方管（8)内的承载板（9)上以传递载荷。
4. 根据权利要求 1所述的半挂车支腿承载螺母，其特征在于： 所述螺母 的柱体（ 1 )与下层（ 4 )之间设有加强筋 （ 7 )。
5. 根据权利要求 4所述的半挂车支腿承载螺母，其特征在于： 所述加强 筋（7)为三角形， 三角形的一边与柱体（1)连接， 另一边与下层（4)连接。
6. 根据权利要求 4所述的半挂车支腿承载螺母，其特征在于： 所述加强 筋（7)为四边形， 四边形的顶边与上层（3)或中间层（6)连接， 底边与下 层（ 4 )连接， 一侧边与柱体（ 1 )连接。
7. 根据权利要求 1所述的半挂车支腿承载螺母，其特征在于： 所述切角 (10)为直线切角或圓弧切角。
PCT/CN2008/001010 2007-11-21 2008-05-23 Ecrou de sollicitation de support de semi-remorque WO2009065288A1 (fr)

Priority Applications (2)

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EP08748531.4A EP2223830A4 (en) 2007-11-21 2008-05-23 SUPPORT NUT FOR SADDLE TRAILERS
US12/744,153 US8622677B2 (en) 2007-11-21 2008-05-23 Semi-trailer support loading nut

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Application Number Priority Date Filing Date Title
CN200710031674.8 2007-11-21
CN200720060046 2007-11-21
CN200720060046.8 2007-11-21
CNA2007100316748A CN101168363A (zh) 2007-11-21 2007-11-21 半挂车支腿
CN2008100278488A CN101269654B (zh) 2008-04-29 2008-04-29 一种半挂车支腿承载螺母
CN200810027848.8 2008-04-29

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US8622677B2 (en) 2014-01-07

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