CN209875708U - Hollow core shaft - Google Patents

Abstract

The utility model provides a hollow mandrel comprises the triplex, two solid ends and a clean shot tripe, solid end is the constant diameter structure, and the clean shot tripe is the reducing structure, and the external diameter of clean shot tripe outermost end equals with solid end external diameter, and the three central line coincides mutually, and the coincidence at three's center under the orthographic projection, the surface of clean shot tripe is the solid of revolution that the generating line was smooth and straight, the cross section of clean shot tripe is circular, and the welded part cross section of clean shot tripe is convex, two solid ends, and the hollow chamber both ends of clean shot tripe are linked together, and the three is in the same place through welded mounting, and the preferred solid end surface of welded position and the surface phase position of solid shot tripe, it is big to solve the dabber total weight.

Description

Hollow core shaft

Technical Field

The utility model relates to an automobile parts field, in particular to hollow dabber for automobile body thrust rod.

Background

With the increasing severity of energy and environment, low fuel consumption and low pollution of automobiles become the development direction of the automobiles. Therefore, on the premise of ensuring the performance and the cost of the automobile, the reduction of the weight of the automobile becomes the focus of attention of various large automobile manufacturers, and the optimization of the product structure is an important way for reducing the weight of the automobile. The current mandrels are all solid structures. Because the mandrel mainly bears bending moment, the inertia moment of the core part area is small, and the material performance can not be fully exerted. Therefore, the solid shaft has the problems of material waste, heavy weight and high cost.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a hollow core axle, it is big mainly to solve the dabber total weight, has the not enough of material waste, provides a novel hollow core axle structure. The method is characterized in that: the hollow core shaft consists of three parts, namely a first solid end, a second solid end and a hollow ball belly, and the three parts are welded together. The first solid end and the second solid end are of an equal-diameter structure, the hollow ball belly is of a reducing structure, the outer diameter of the outermost end of the hollow ball belly is equal to the outer diameters of the first solid end and the second solid end, the center lines of the first solid end and the second solid end are coincident, and the centers of the first solid end, the second solid end and the hollow ball belly are coincident under orthographic projection. The outer surface of the hollow ball belly is a revolving body with a smooth bus, the cross section of the hollow ball belly is circular, and the cross section of the welding part of the hollow ball belly is arc-shaped.

The first solid end and the second solid end are communicated with two ends of the hollow cavity of the hollow ball belly, the first solid end and the second solid end are welded together, and the welding position is preferably the connecting position of the outer surface of the solid end and the outer surface of the hollow ball belly.

The wall thickness of the hollow ball belly is more than or equal to 5 mm and less than or equal to 15 mm.

The first solid end, the second solid end and the hollow ball belly all adopt a die integrated forming process.

Compared with the prior art, a hollow core axle compares with ordinary dabber, and weight reduction is about more than 30%, sparingly consumes the material, has improved production efficiency greatly.

Drawings

1. FIG. 1 is a cross-sectional view of a hollow mandrel

2. FIG. 2 is a sectional view of the hollow mandrel showing the assembly of 1-the first solid end 2-the hollow ball belly 3-the second solid end

Detailed Description

As shown in fig. 1 and 2, a hollow mandrel is composed of three parts, namely a first solid end (1), a hollow ball belly (2) and a second solid end (3), which are welded together. First solid end (1) and the solid end of second (3) are the constant diameter structure, and clean ball tripe (2) are diameter-variable structure, and the external diameter of clean ball tripe (2) outermost end equals with the external diameter of the solid end of first (1) and second (3), and the central line coincides mutually, and the coincidence mutually of the center of three under the orthographic projection. The outer surface of the hollow ball belly (2) is a revolving body with a smooth bus, the cross section of the hollow ball belly (2) is circular, and the cross section of the welding part of the hollow ball belly (2) is arc-shaped.

The first solid end (1) and the second solid end (3) are communicated with two ends of the hollow cavity of the hollow ball belly (2) and are arranged together in a welding mode, and the welding position is preferably the position where the outer surfaces of the first solid end (1) and the second solid end (3) are connected with the outer surface of the hollow ball belly (2).

The wall thickness of the hollow ball belly (2) is more than or equal to 5 mm and less than or equal to 15 mm.

The first solid end (1), the second solid end (3) and the hollow ball belly (2) are integrally formed by a die.

The hollow ball belly (2) can greatly reduce the weight of the mandrel.

Compared with the prior art, the hollow mandrel has the advantages that compared with the common mandrel, the weight is reduced by more than about 30 percent, and the material consumption is reduced.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Claims (3)

1. A hollow mandrel, characterized by: comprises three parts, namely a first solid end (1), a hollow ball belly (2) and a second solid end (3), the first solid end (1) and the second solid end (3) are of an equal-diameter structure, the hollow ball belly (2) is of a variable-diameter structure, the outer diameter of the outermost end of the hollow ball belly (2) is equal to the outer diameters of the first solid end (1) and the second solid end (3), the center lines of the three parts are coincident, the center lines under the orthographic projection are coincident, the outer surface of the hollow ball belly is a revolving body with smooth bus, the cross section of the hollow ball belly (2) is circular, the cross section of the welded part of the hollow ball belly (2) is arc-shaped, the first solid end (1) and the second solid end (3) are communicated with two ends of a hollow cavity of the hollow ball belly (2), the first solid end and the second solid end are welded together, and the welded positions are preferably the positions where the outer surface of the solid ends is connected with the outer surface of the hollow ball belly.

2. A hollow mandrel as claimed in claim 1 wherein: the wall thickness of the hollow ball belly (2) is more than or equal to 5 mm and less than or equal to 15 mm.

3. A hollow mandrel as claimed in claim 1 wherein: the first solid end (1), the second solid end (3) and the hollow ball belly (2) are all formed by a die in an integrated manner.