Double-layer push broach for broaching nylon layer of external spline

Abstract

The utility model relates to a double-layer push broach for broaching nylon layers of external splines, which comprises a push broaching piece and a correcting piece which are coaxially arranged. A plurality of push broaching teeth are arranged on the inner side wall of the push broaching piece, and push broaching blades are arranged at the front ends of the push broaching teeth; a plurality of correction teeth are arranged on the inner side wall of the correction piece, and the tip circles of the push broaching teeth and the correction teeth are the same. The correcting piece is arranged to abut against the workpiece on the rear side, so that the workpiece cannot deviate in the machining process, the quality of the workpiece can be improved, meanwhile, the correcting piece is simple in structure and low in manufacturing cost, and cost can be saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to spline processing technical field, concretely relates to a double layer push broach of push cut outer spline nylon layer. BACKGROUND

[0002] ‌Nylon spline refers to the spline with nylon coating on the surface, which has the advantages of good wear resistance, strong corrosion resistance and low noise. Nylon spline is usually used in occasions requiring high wear resistance, corrosion resistance and low noise, such as automobile transmission shaft and other components.‌

[0003] At present, the finishing of the nylon outer spline after coating the nylon layer is to use a special fixture to position on the push molding machine, and then use a nylon push broach to push cut. When the outer spline part is too long to pass through the blade part of the push broach during processing, the tool will be allowed to cause the part to deviate. Therefore, the application provides a double layer push broach of push cut outer spline nylon layer. SUMMARY

[0004] In view of the above problems, the utility model provides a double layer push broach of push cut outer spline nylon layer, which makes the push cutting process more stable and reliable, and can better control the spline size. The specific technical scheme is as follows:

[0005] A double layer push broach of push cut outer spline nylon layer, comprising a push cutting part and a correction part, the push cutting part and the correction part are coaxial, a plurality of push cutting teeth are arranged on the inner side wall of the push cutting part, the front end of each push cutting tooth is provided with a push cutting edge, a plurality of correction teeth are arranged on the inner side wall of the correction part, and the tooth top circle of the push cutting tooth and the correction tooth is the same.

[0006] Further, the root circle of the correction tooth is larger than the root circle of the push cutting tooth.

[0007] Further, the projection of the push cutting part and the push cutting tooth in the axial direction covers the correction part and the correction tooth.

[0008] Further, the push cutting part and the correction part are connected through screws.

[0009] Further, it further comprises a limiting groove for limiting the push cutting direction, and the limiting groove penetrates the push cutting part and the correction part.

[0010] The utility model has the advantages that:

[0011] By arranging the correction part to abut against the workpiece at the rear side, the workpiece will not deviate during processing, which is beneficial to improve the workpiece quality. At the same time, the correction part has a simple structure and low manufacturing cost, which is beneficial to save cost. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0013] Fig. 1 is a schematic view of the push cutting member of the present application;

[0014] Fig. 2 is a schematic view of the correction member of the present application.

[0015] In the figure: 1, push cutting member; 2, push cutting tooth; 3, correction member; 4, correction tooth; 5, limiting groove. DETAILED DESCRIPTION

[0016] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0017] With the push cutting forward direction as the front side, the present application provides the following specific implementation scheme:

[0018] As shown in Figs. 1-2 The present application provides a double-layer push cutter for push cutting external spline nylon layer, comprising a push cutting member 1 and a correction member 3, the push cutting member 1 and the correction member 3 are both circular columnar, the push cutting member 1 and the correction member 3 are coaxially arranged, a plurality of push cutting teeth 2 on the inner side wall of the push cutting member 1, the front end of each push cutting tooth 2 is provided with a push cutting edge, a plurality of correction teeth 4 on the inner side wall of the correction member 3, the addendum circle of the push cutting tooth 2 and the correction tooth 4 is the same, so that the correction tooth 4 can touch the workpiece after the push cutting tooth 2 is pushed, avoiding the workpiece from being offset.

[0019] Further, the dedendum circle of the correction tooth 4 is larger than the dedendum circle of the push cutting tooth 2, which facilitates processing while saving cost.

[0020] Further, the projection of the push broaching piece 1 and the push broaching tooth 2 in the axial direction covers the correction piece 3 and the correction tooth 4, ensuring that the push broaching is not affected.

[0021] Further, the push broaching piece 1 and the correction piece 3 are connected by screws. In addition, when the push broaching tool is installed, the push broaching piece 1 and the correction piece 3 can be fixed together with the pushing part of the push broaching machine by the screws.

[0022] Further, the limiting groove 5 for limiting the push broaching direction is also included, and the limiting groove 5 cooperates with the limiting protrusion on the push broaching machine to limit the push broaching direction during the push broaching, and the limiting groove 5 penetrates through the push broaching piece 1 and the correction piece 3.

[0023] By setting the correction piece 3 to abut against the workpiece at the rear side, the workpiece is prevented from being deviated during the machining process, which is beneficial to improve the workpiece quality, and meanwhile, the correction piece 3 has a simple structure and low manufacturing cost, which is beneficial to save the cost.

[0024] The basic principle, main features and advantages of the utility model are shown and described above. The skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, and the utility model will have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed.

Claims

1. A double-layer push broach for push broaching outer spline nylon layer, comprising a push broaching piece (1), a plurality of push broaching teeth (2) on the inner side wall of the push broaching piece (1), and a push broaching edge arranged at the front end of each push broaching tooth (2), characterized in that: Also comprising a correction member (3) coaxially arranged with the push broaching member (1), a plurality of correction teeth (4) on the inner side wall of the correction member (3), and the addendum circle of the push broaching teeth (2) and the correction teeth (4) being the same.

2. The double-layer push broach for pushing out the outer spline nylon layer according to claim 1, characterized in that: The root circle of the correction teeth (4) is larger than the root circle of the push broaching teeth (2).

3. The double-layer push broach for pushing out the outer spline nylon layer according to claim 1, characterized in that: The projection of the push broaching member (1) and the push broaching teeth (2) in the axial direction covers the correction member (3) and the correction teeth (4).

4. The double-layer push broach for pushing out the outer spline nylon layer according to claim 1, characterized in that: The push broaching member (1) and the correction member (3) are connected by screws.

5. The double-layer push broach for pushing out the outer spline nylon layer according to claim 1, characterized in that: Also comprising a limiting groove (5) for limiting the push broaching direction, the limiting groove (5) penetrating through the push broaching member (1) and the correction member (3).

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