CN107570810A - Spline positioning core axle - Google Patents

Abstract

The present invention relates to gear grinding location equipment technical field, specifically a kind of spline positioning core axle, including spline mandrel, the centre of gyration of the spline mandrel is provided with the first endoporus to connect with each other vertically, second endoporus, 3rd endoporus, adjust cavity, it is big in collar extension to adjust cavity, the small cone-shaped of internal orifice, outer surface on spline mandrel corresponding to adjusting cavity body region is uniformly distributed along the circumference provided with spline tooth, spline tooth groove is formed between two neighboring spline tooth, the circumferential surface that adjusting cavity body region is formed on spline mandrel is laid with bar-shaped trough, bar-shaped trough connection regulation cavity；Tension mandrel is equipped with adjusting in cavity.Spline positioning core axle of the present invention is swelled, accurate positioning；The spline positioning core axle is safe and reliable, easy to operate；The spline positioning core axle is simple and reliable for structure, easy to maintenance.

Description

Spline Locating Mandrel

technical field

The invention relates to the technical field of gear grinding and positioning equipment, in particular to a spline positioning mandrel.

Background technique

With the improvement of factory production level, the requirements for the use of related tools are also constantly increasing. A large number of gear shaft products are spline counterbore parts, which require the spline to be used as the positioning reference, and the precision level of the external gear is required to be high, so it is difficult to process such products. At present, the spline mandrel is mainly used to position the grinding teeth. Due to heat treatment deformation and other reasons, the size of the internal spline changes greatly, and multiple mandrels are needed to meet the production requirements. During use, it is necessary to replace the mandrel many times to find a suitable mandrel. Great. And because the spline mandrel has a taper, it will be stuck with the spline in the gear shaft after it is installed. After the teeth are ground, it takes a lot of strength to take out the mandrel, which is inconvenient for replacement. When changing the insertion position of the spline mandrel, it is easy to produce chaotic teeth, which affects the accuracy of the gear shaft.

Contents of the invention

In view of the above problems, the present invention provides a spline positioning mandrel, which can conveniently and quickly locate and disassemble a gear shaft workpiece with an internal spline.

According to the technical solution of the present invention: a spline positioning mandrel, including a spline mandrel, is characterized in that: the center of rotation of the spline mandrel is axially provided with a first inner hole and a second inner hole connected to each other. hole, the third inner hole, and the regulating cavity. The regulating cavity is in the shape of a cone with a large external opening and a small internal opening. A spline tooth groove is formed between two adjacent spline teeth, and bar-shaped grooves are evenly distributed on the circumferential surface of the spline mandrel where the adjustment cavity is formed, and the bar-shaped grooves are connected to the adjustment cavity; the tensioning mandrel is matched with the In the adjustment chamber, the tensioning mandrel moves axially in the adjustment chamber to achieve shrinkage or tensioning of the spline teeth; the first inner hole of the spline mandrel is provided with a modified screw, and the nail body part of the modified screw is After passing through the second inner hole, it extends into the third inner hole, and the end of the nail body of the modified screw is threadedly connected with the tensioning mandrel.

As a further improvement of the present invention, the tensioning mandrel includes a tapered portion and a connecting shaft integrally connected to the end surface of the tapered portion, the tapered portion fits into the adjustment cavity, and the connecting shaft extends into the third inner hole.

As a further improvement of the present invention, the inner diameter of the first inner hole is larger than that of the second inner hole, and the inner diameter of the third inner hole is larger than that of the first inner hole.

As a further improvement of the present invention, an arc transition groove is provided between the outer peripheral surface of the adjusting cavity part and the outer peripheral surface of the third inner hole part on the splined mandrel.

The technical effects of the present invention are: the spline positioning mandrel of the present invention is tension-type, and the positioning is accurate; the spline positioning mandrel is safe and reliable, and easy to operate; the spline positioning mandrel has a simple and reliable structure and is easy to maintain.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a right side view of Fig. 1 .

detailed description

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

In Figures 1 and 2, it includes a splined mandrel 1, a first inner hole 1-1, a second inner hole 1-2, a third inner hole 1-3, an adjustment cavity 1-4, and a strip groove 1-5 , spline teeth 1-6, spline teeth grooves 1-7, reformed screws 2, tension mandrel 3, tapered part 3-1, connecting shaft 3-2, etc.

As shown in Figures 1 and 2, the present invention is a splined positioning mandrel, including a splined mandrel 1, and the center of rotation of the splined mandrel 1 is axially provided with first inner holes 1- 1. The second inner hole 1-2, the third inner hole 1-3, the adjustment cavity 1-4, the adjustment cavity 1-4 is in the shape of a cone with a large outer opening and a small inner opening, corresponding to the spline mandrel 1 Spline teeth 1-6 are evenly distributed along the circumference on the outer surface of the adjustment cavity 1-4, and spline tooth grooves 1-7 are formed between two adjacent spline teeth 1-6, and the spline mandrel 1 Strip grooves 1-5 are evenly distributed on the circumferential surface of the adjustment cavity 1-4, and the strip grooves 1-5 are connected to the adjustment cavity 1-4; the tensioning mandrel 3 is co-located on the adjustment cavity 1-4 Among them, the tensioning mandrel 3 moves axially in the adjustment cavity 1-4 to realize the contraction or tensioning of the spline teeth 1-6; the first inner hole 1-1 of the spline mandrel 1 is set to Screw 2, the nail body part of the reformed screw 2 passes through the second inner hole 1-2 and then extends into the third inner hole 1-3, and the nail body end of the reformed screw 2 is threadedly connected with the tensioning mandrel 3.

The tensioning mandrel 3 includes a conical part 3-1 and a connecting shaft 3-2 integrally connected to the end surface of the conical part 3-1. The conical part 3-1 fits in the adjustment cavity 1-4, and the connecting shaft 3- 2 extends into the third inner hole 1-3.

The inner diameter of the first inner hole 1-1 is larger than the inner diameter of the second inner hole 1-2, and the inner diameter of the third inner hole 1-3 is larger than that of the first inner hole 1-1.

An arc transition groove 4 is provided between the outer peripheral surface of the adjustment cavity 1-4 on the splined mandrel 1 and the outer peripheral surface of the third inner hole 1-3.

The working process of the present invention is as follows: after the product of the present invention is inserted into the spline, the tightening mandrel 3 is pulled to the left by tightening the restructured screw 2. Since the tightening mandrel 3 and the spline mandrel 1 are taper fit, the tensioning mandrel When the shaft 3 moves to the left, the spline part of the spline mandrel 1 is stretched outward, so that the inner spline of the gear shaft is tightened. After the processing is finished, by loosening the modified screw 2, the pressure of the tensioning mandrel 3 against the spline part of the spline mandrel 2 is relaxed, and the spline part of the spline mandrel 1 shrinks inward, and is separated from the internal spline of the gear, so that the The splined positioning mandrel is separated from the gear.

The product of the invention is a tool for converting the gear shaft datum, and converts the spline datum into a center hole datum which is beneficial to the gear grinding process, thereby ensuring the precision requirement of the gear shaft grinding.

Claims (4)

1. a kind of spline positioning core axle, including spline mandrel（1）, it is characterised in that：The spline mandrel（1）Centre of gyration edge It is axially arranged with the first endoporus to connect with each other（1-1）, the second endoporus（1-2）, the 3rd endoporus（1-3）, regulation cavity（1- 4）, adjust cavity（1-4）In the cone-shaped that collar extension is big, internal orifice is small, spline mandrel（1）It is upper to correspond to regulation cavity（1-4）Position Outer surface be uniformly distributed along the circumference provided with spline tooth（1-6）, two neighboring spline tooth（1-6）Between formed spline tooth groove（1-7）, Spline mandrel（1）It is upper to form regulation cavity（1-4）The circumferential surface at position is laid with bar-shaped trough（1-5）, bar-shaped trough（1-5）Even Logical regulation cavity（1-4）；Tension mandrel（3）It is equipped with regulation cavity（1-4）In, tension mandrel（3）In regulation cavity（1- 4）In be axially moveable realization for spline tooth（1-6）The contraction at position or tensioner；Spline mandrel（1）The first endoporus（1-1） It is middle that transformation of the way screw is set（2）, change a social system screw（2）Shank portion pass through the second endoporus（1-2）After stretch into the 3rd endoporus（1-3） In, change a social system screw（2）Rivet nut end and tension mandrel（3）Threaded connection.

2. spline positioning core axle as claimed in claim 1, it is characterised in that：The tension mandrel（3）Including tapered portion（3-1） And it is integrally connected to tapered portion（3-1）The connecting shaft of end face（3-2）, tapered portion（3-1）It is matched with regulation cavity（1-4）In, even Spindle（3-2）Stretch into the 3rd endoporus（1-3）In.

3. spline positioning core axle as claimed in claim 1, it is characterised in that：First endoporus（1-1）Internal diameter be more than the Two endoporus（1-2）Internal diameter, the 3rd endoporus（1-3）Internal diameter be more than the first endoporus（1-1）Internal diameter.

4. spline positioning core axle as claimed in claim 1, it is characterised in that：The spline mandrel（1）Upper regulation cavity（1-4） The outer circumference surface at position and the 3rd endoporus（1-3）Arc transition groove is provided between the outer circumference surface at position（4）.