Improved locking differential

FIELD: machine building.

SUBSTANCE: interlocking device of differential includes coupling element (1) having the channel intended for retention of spring (7) coaxially with pin (3, 4) located in appropriate second coupling element. Passage for spring through lateral side (11, 12) of coupling element is formed with slot (10) passing through side wall of the above coupling element and being the part of inner surface of coupling element (1).

EFFECT: reducing the time required for manufacture and manufacturing costs.

6 cl, 3 dwg

 

The technical FIELD

The invention relates to locking the differentials, in particular to this type of locking differential, which contains the annular elements of the friction clutch with a notch intended for conventional attaching the drive shaft of the vehicle to a pair of coaxial driven shafts.

BACKGROUND of the INVENTION

The technical field to which this invention is well described in various other technical patent documents such as U.S. patent No. 5836220, published in 1998, U.S. patent No. 5413015 name Zentmyer and U.S. patent No. 5715733 name Disset. In each of these documents describes a pair of clutch elements, squeezed in the hand, under the influence of spring units, each of which contains a blocking finger located coaxially with one or more coil springs.

The problem, which seeks the invention may best be explained by reference to the drawings in U.S. patent No. 5715733 in which Fig, 15 and 16 illustrate the method of introduction of the spring through the inlet passage 32 for the spring to provide axial engagement with the locking finger.

This problem relates to the manufacture of the coupling element, which is shown in figures 9, 10, 11 and 12 of U.S. patent No. 5715733.

The cost of manufacturing such products for which isit from technical difficulties, associated with any production technology.

It was found that by changing the shape of the channel that holds the spring, you can significantly reduce the manufacturing time and manufacturing costs.

The INVENTION

In the present invention proposed a locking differential, contains two elements of the clutch, one of which has a channel to hold the springs are designed to maintain the spring in alignment with the finger positioned in correspondingly located the second coupling element, the locking device differs in that the passage for the spring through the side of the coupling element to the channel to hold the spring is formed by a slot passing completely through the side wall of the specified coupling element and extending from its inner surface. The inner surface of the coupling element is a surface in which one coupling element facing the other coupling element, when these elements are assembled with the formation of the locking device, that is, the inner surface of the bonding elements are opposite and are inside the block.

Preferably the spring is held in the coupling element may be in interaction with the end coaxially positioned finger.

The other end of the spring can be maintained by placing Glubokoe part of the channel to hold the spring.

These bonding elements can contain multiple combined so fingers and springs.

Spring can be a helical spring and to stay aligned with the finger relative to its end, the finger may have a portion of reduced diameter, which is designed for placement inside the coil springs.

Specified deepest part of the channel to hold the springs can be made deeper than the passage through the side of the coupling element, and its diameter at least equal to the diameter of the lower part of the spring which thus comes into this part of the channel and held therein when in use.

Thus, in the present invention is proposed instead of using the input passage to the springs, which, as shown, has the shape of a box passing through the channel to hold the spring having dimensions greater than rated, use an input passage for the spring, which is made elongated and open from the inside, i.e. from the inner surface of the coupling element.

However, in essence, this means that the spring will not stay in place, therefore, a tool that provides the exact location of the spring on the inner end and the other end of the spring on the retaining finger tight on what adcoy.

The advantage of the proposed changes is the possibility of manufacturing the coupling element with the processing of only three axes, instead of applied to the real-time processing on the four axes.

As you can see, if the end mill channelled through the surface of the coupling element to create a channel to hold the spring with dimensions of more than nominal, it is easy to send it in the diametrical direction for cutting through the outer wall with the performance of its groove.

This solution eliminates the need for the next processing cycle, which then need to Orient the tool so as to ensure its rotation relative to the diametrical direction and to perform milling elongated inlet passage for the spring.

Thus, the execution of the parts is greatly simplified.

Additionally, since you can perform less complex machining process, in some cases, can be used more practical from an economic point of view, the machines than in the case of milling on four axes.

Another advantage of this invention is that it allows you to simplify mass production, in which production of a large number of parts can be performed on a single machine without n the need to change their position.

A significant advantage of the described construction is that when assembling this way it is much easier to enter the spring, if the space provided to accommodate differential with the introduction of devices of this type are limited.

For a better understanding of the present invention are described below with reference to the drawings, in which

figure 1 depicts a view in the perspective view of the coupling element with attached springs and axial fingers,

figure 2 depicts a longitudinal section of the node of the two clutch elements with aligned spaced fingers, which is partially introduced into the channels to hold the spring, and

figure 3 depicts another view in a perspective view with partial cutaway, illustrating the positioning of the finger on one axis with the channel to hold the spring having a size of more than nominal, and showing how the finger is coaxially mounted in the lower channel, and its lower end is inserted in the engagement.

Let us consider these drawings, on which you can see one element of the clutch device indicated by the number 1 position and having openings 2, designed to accommodate the fingers 3 and 4 cylindrical slidable relatively dense planting.

The shape of the channels to hold the springs is relatively complex, so predusmatriva what is the possibility of one milling cutting tool, passing through programmed a certain trajectory.

This trajectory includes milling elongated deep channel, one part of which is made deeper than the other part, to create a seat for the spring.

Another tool path goes from the Central part of the elongated channel with dimensions exceeding the nominal outside through the wall with the creation of the groove 10 with parallel sides 11, 12 and a width at least sufficient to pass through the slot of the spring 7.

The spring 7 is designed for fixing on the end 8 of the finger 9, part of which at this end is made with a diameter that is smaller than the diameter of the main part of the finger, and which is injected into the channel inside the coil springs.

Then, of course, possible Assembly, whereby when the fingers are in place, each spring can be inserted with a relative degree of freedom so that the specified part at the end of the finger is placed in the channel of the corresponding coil spring, and the lower portion of this spring is slid in the deepest part of the channel for holding the spring with the installation and holding it.

As noted previously, this arrangement has the dual advantages, one of which is cheaper and more convenient method of manufacture of the coupling element having channels of this type, and the second UE is owenii subsequent installation of a locking differential in accordance with this design.

The purpose of this description is to illustrate the present invention and not a limitation.

1. Lock differential, contains two elements of the clutch, one of which has a channel to hold the springs are designed to maintain the spring in alignment with the finger positioned in correspondingly located the second coupling element, wherein the passage for the spring through the side of the coupling element to the channel to hold the spring is formed by a slot passing completely through the side wall of the specified coupling element and extending from its inner surface.

2. A locking differential according to claim 1, characterized in that the spring is held in the coupling element is in engagement with the end coaxially positioned finger.

3. A locking differential according to claim 2, characterized in that the other end of the spring is held by its placement in the deep part of the channel to hold the spring.

4. A locking differential according to claim 1, characterized in that the bonding elements contain several combined so fingers and springs.

5. A locking differential according to claim 1, characterized in that the spring is a helical spring and is held coaxially with the finger relative to its end, and the finger has a portion of reduced diameter, which is designed for the asemenea inside the coil springs.

6. A locking differential according to claim 3, characterized in that the deepest part of the channel to hold the spring is made deeper than the passage through the side of the coupling element, and its diameter at least equal to the diameter of the lower part of the spring which thus comes into this part of the channel and held therein during use.



 

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