CN209349542U - A Turning Fixture for a Planetary Carrier - Google Patents

Abstract

The utility model belongs to the technical field of fixtures, and specifically discloses a turning fixture for a planetary frame, which includes a clamp body, which includes a circular base and a circular inner support mechanism that cooperates with the circular end surface of the planetary frame for positioning. The bracing mechanism is arranged on the base; and the slider is arranged on the lower end surface of the base through fasteners so as to be directly clamped on the three-jaw chuck, and then the planet carrier to be processed is installed on the At this time, the CNC lathe can be manipulated to turn the outer diameter and end face of the planet carrier. The fixture of the utility model has the advantages of simple operation, high workpiece positioning accuracy, high safety factor, high processing efficiency, stable product quality and greatly improved yield rate, and is suitable for mass production.

Description

A Turning Fixture for a Planetary Carrier

technical field

The utility model relates to a fixture, in particular to a turning fixture for a planet carrier.

Background technique

Clamping the workpiece with a fixture is a common method to eliminate the degree of freedom of the workpiece. The most rational clamping is of course multi-point positioning. However, for actual workpiece clamping, it is difficult to clamp the workpiece with only a few points. The possible reason is that the contact area of the clamping point is too small, and there is also the problem that the surface of the workpiece is pinched and denatured. Therefore, in actual work, it is better to clamp the workpiece with a larger contact surface. The existing solution is to use the three-grip chuck to process the inner support, and then use a lathe to turn the outer diameter and end face. This solution has complex operations, low workpiece positioning accuracy, low safety factor, low processing efficiency, poor product quality stability and high scrap rate. advanced questions.

According to the principle of surface contact, the special fixture for the planetary carrier can be completely attached to the planetary carrier, thus ensuring the complete positioning of the workpiece. The planet carrier is an intermittent part with poor balance force. If the internal support fixture is used, the part and the fixture can be fully contacted, the coaxiality is better, and the runout is small, and the rigidity of the internal support mechanism is better, and there is sufficient internal support force. The action point of the workpiece should be as close as possible to the processing surface, and it should be supported on the part with better rigidity of the workpiece to ensure that the internal support is reliable and the deformation of the internal support is small. In addition, the design of the internal support fixture makes the center of gravity of the assembly coincide with the center of rotation, which plays a role in weight balance for the entire fixture, and further ensures the dynamic balance requirements of the fixture during processing.

Contents of the invention

In order to solve the above problems, the utility model accordingly provides a turning fixture for a planet carrier, which is provided with an inner support mechanism that cooperates with the end surface of the planet carrier for positioning.

The technical scheme of the utility model is as follows:

A turning fixture for a planet carrier, comprising

The clamp body, which includes a circular base and a circular inner support mechanism that cooperates with the circular end surface of the planet carrier for positioning, and the inner support mechanism is arranged on the base;

And a slider, which is arranged on the lower end surface of the base through fasteners, so as to be clamped on the three-jaw chuck.

In an embodiment of the present utility model, the shape of the slider is T-shaped, and threaded holes are respectively provided on both sides thereof.

In an embodiment of the present invention, the clamp body is provided with a through hole corresponding to the threaded hole of the slider, the fastener is a screw, and the screw passes through the The through hole is threadedly connected with the threaded hole.

In an embodiment of the present utility model, the number of the sliders is three, which are arranged on the lower surface of the base at 120°.

In an embodiment of the present invention, the radius of the inner support mechanism is smaller than the radius of the base, and the centers of the two circles coincide.

In an embodiment of the present utility model, the inner support mechanism is an inner support cylinder, and its circumference is chamfered.

Compared with the prior art, the beneficial effects of the utility model are as follows:

The utility model has the advantages of simple operation, high workpiece positioning accuracy, high safety factor, high processing efficiency, stable product quality and greatly improved yield, and is suitable for mass production. The specific advantages are as follows:

1. It can stably guarantee the processing accuracy of the workpiece

When the fixture of the utility model clamps the workpiece, the position accuracy of the workpiece relative to the tool and the machine tool is guaranteed by the fixture, which is not affected by the technical level of the workers, so that the machining accuracy of a batch of workpieces tends to be consistent.

2. It can reduce auxiliary working hours and improve labor productivity

The fixture of the utility model clamps the workpiece conveniently and quickly, and the workpiece does not need to be aligned by marking, which can significantly reduce the auxiliary man-hours; after the workpiece is clamped in the fixture, the rigidity of the workpiece is improved, and the cutting amount can be increased; multiple pieces can be used , Multi-station fixtures for clamping workpieces, and high-efficiency clamping mechanisms can be used to further improve labor productivity.

3. Guarantee machining accuracy

The fixture installation of the utility model can accurately determine the mutual position between the workpiece, the machine tool and the cutting tool. The position accuracy of the workpiece is guaranteed by the fixture, which is not affected by the technical level of workers, and its machining accuracy is high and stable.

4. Improve productivity and reduce costs

The fixture clamping workpiece of the utility model can quickly locate and clamp the workpiece without alignment, which significantly reduces auxiliary man-hours; using the fixture to clamp the workpiece improves the rigidity of the workpiece, so the cutting amount can be increased; it can be used Multi-piece, multi-station fixtures clamp workpieces, and adopt efficient clamping mechanisms. These factors are conducive to improving labor productivity. In addition, after the use of fixtures, the product quality is stable, the scrap rate is reduced, and workers with lower technical levels can be arranged, which significantly reduces production costs.

5. Expand the process range of machine tools

The fixture of the utility model can change the purpose of the original machine tool and expand the application range of the machine tool, so as to realize one machine with multiple functions. For example, after the boring jig is installed on the lathe or radial drilling machine, the hole system of the box can be bored; the lathe can also be changed to a broaching machine through the special jig, so as to give full play to the role of the general-purpose machine tool.

6. Reduce the labor intensity of workers

The fixture of the utility model is convenient and quick, and when pneumatic, hydraulic and other clamping devices are used, the labor intensity of workers can be reduced.

Of course, any product implementing the present utility model does not necessarily need to achieve all the above-mentioned advantages at the same time.

Description of drawings

Fig. 1 is a front view of a turning fixture for a planet carrier according to an embodiment of the present invention;

Fig. 2 is a top view of a turning fixture for a planet carrier according to an embodiment of the present invention;

Fig. 3 is a bottom view of a turning fixture for a planet carrier according to an embodiment of the present invention;

Fig. 4 is a perspective view of a turning fixture for a planet carrier according to an embodiment of the present invention;

Fig. 5 is an exploded view of a turning fixture for a planet carrier according to an embodiment of the present invention;

Fig. 6 is an assembly diagram of a turning jig for a planetary carrier and a planetary carrier according to an embodiment of the present invention.

Marks in the figure: 1-clamp body, 11-base, 12-inner support mechanism, 13-through hole, 2-slider, 3-fastener, 4-planet carrier.

Detailed ways

In order to make the above purpose, features and advantages of the present utility model more obvious and understandable, the specific implementation of the present utility model will be described in detail below in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a full understanding of the present invention. However, the utility model can be implemented in many other ways different from those described here, and those skilled in the art can do similar promotions without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below .

Referring to Figures 1 to 5, a turning fixture for a planet carrier according to an embodiment of the present invention includes

Clamp body 1, which includes a circular base 11 and a circular inner support mechanism 12 that cooperates with the circular end surface of the planet carrier 4 for positioning, and the inner support mechanism 12 is arranged on the base 11;

And the slider 2, which is arranged on the lower end surface of the base 11 through the fastener 3, so as to be directly clamped on the three-jaw chuck.

Then install the planetary carrier 4 to be processed on the fixture of this embodiment, as shown in FIG. 6 , at this time, the outer diameter and end face of the planetary carrier 4 can be turned by the numerical control machine.

In another embodiment of the present utility model, in order to realize that the clamp can be directly clamped on the existing three-jaw chuck, without further modification of the existing three-jaw chuck, and to perform good claw force on the slider 2, The optional shape of the slider 2 is T-shaped, and the claw force points are located on the two concave sides of the T-shaped block. The screws realize that the slider 2 is connected to the lower end surface of the base 11 . But the utility model does not limit the shape of the slider 2 and the optional connection arrangement of the slider 2 .

To this end, the clamp body 1 is provided with a through hole 13 corresponding to the threaded hole of the slider 2, the fastener 3 is a screw, and the screw 3 passes through the through hole 13. Hole 13 is threadedly connected with said threaded hole.

Preferably, the number of the sliders 2 is three, and they are arranged on the lower end surface of the base 11 at 120°.

Preferably, the radius of the inner supporting mechanism 12 is smaller than the radius of the base 11, and the centers of the two circles coincide, like steps.

Further preferably, the inner support mechanism 12 is an inner support cylinder, and its circumference is chamfered, and the end surface of the inner support cylinder bears against the end surface of the planet carrier 4 .

The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not exhaust all details, nor do they limit the utility model to the specific implementations described. Obviously, many modifications and variations can be made based on the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that those skilled in the art can well understand and utilize the utility model. The invention is to be limited only by the claims and their full scope and equivalents.

Claims (6)

1. A turning fixture for a planet carrier, characterized in that, comprising The clamp body, which includes a circular base and a circular inner support mechanism that cooperates with the circular end surface of the planet carrier for positioning, and the inner support mechanism is arranged on the base; And a slider, which is arranged on the lower end surface of the base through fasteners, so as to be clamped on the three-jaw chuck. 2 . The turning fixture for the planet carrier according to claim 1 , wherein the shape of the slider is T-shaped, and threaded holes are respectively provided on both sides thereof. 3 . 3. The turning fixture for the planetary carrier according to claim 2, wherein the clamp body is provided with a through hole corresponding to the threaded hole of the slider, and the fastener It is a screw, and the screw passes through the through hole and is threadedly connected with the threaded hole. 4 . The turning fixture for planetary carrier according to claim 1 , characterized in that, the number of said sliders is three, which are respectively arranged on the lower end surface of said base at 120°. 5 . The turning fixture for the planet carrier according to claim 1 , wherein the radius of the inner supporting mechanism is smaller than the radius of the base, and the centers of the two circles coincide. 6 . 6 . The turning fixture for the planetary carrier according to claim 1 , wherein the inner supporting mechanism is an inner supporting cylinder, and its circumferential direction is chamfered. 6 .