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长期从事运输的手扶拖拉机,使用中挂接框容易损坏。为延长挂接框的使用寿命,可采用下述方法。(1)将原挂接框牵引孔直径扩至26毫米,见图1。(2)在挂接框上钻通两个与牵引孔相通的直径为3.2毫米的孔,再分别攻 M4的螺纹,见图2所示。(3)用直径28毫米的45~#圆钢加工两个外径为26毫米、内径22毫米、长15毫米的衬套,再在衬套的对称处打两个φ4的90°锥窝,见图3。
Long-term transport of walking tractor, the use of the frame is easy to damage. In order to extend the service life of the frame, the following method can be used. (1) Expand the diameter of the trailing hole of the original frame to 26 mm (see Figure 1). (2) Drilling two holes with a diameter of 3.2 mm which are communicated with the traction holes in the hooking frame, respectively, and then tapping M4 threads, as shown in FIG. 2. (3) Machining two bushing with outer diameter of 26 mm, inner diameter of 22 mm and length of 15 mm using 45 ~ # bar with a diameter of 28 mm, and then making two φ4 90 ° cone bosses at the symmetry of the bushing, See Figure 3.