JPS6367464A - Driving sprocket - Google Patents

Abstract

PURPOSE:To allow correct engagement even if a transfer chain is displaced by providing a circular spline coupling section capable of relatively moving circularly around the axis of a transfer shaft of a sprocket main body. CONSTITUTION:A driving sproket 1 is constituted of an engaging section 19 an a sprocket main body 27. A circular female spline 33 is provided inside the sproket main body 27. On the other hand, a male spline 31 to be coupled with the spline 33 is formed on the spherical section 5a of an axle 5 respectively. Then, a spline coupling section 29 can be relatively moved circularly around the axial line W. Accordingly, the engaging section 19 is changed in direction is response to the displacement of a transfer chain, thus reasonable and correct engagement is allowed.

Description

[Detailed description of the invention] [Industrial application field 1 This invention relates to a driving sprocket.

[Prior Art] A conventional drive sprocket is spline-fitted or key-fitted to a transmission shaft, a transmission chain is wound around the sprocket, and power from the transmission chain is transmitted to the transmission shaft via the sprocket. will be done.

[Problems to be Solved by the Invention] As described above, the sprocket is spline-fitted to the transmission shaft, and the transmission chain can mesh with the sprocket. The hanging direction of the transmission chain is set to be almost perpendicular to the axis of the transmission shaft, and the sprocket and transmission chain are structured to mesh easily. For this reason, for example, if the hanging direction of the transmission chain is displaced by a predetermined angle with respect to the axis of the transmission shaft, a normal meshing state with respect to the sprocket cannot be obtained, and there is a problem that transmission becomes impossible.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a driving sprocket that can maintain a correct meshing state without any difficulty even if the winding direction of the transmission chain is displaced by a desired angle.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a driving sprocket comprising a meshing portion that meshes with a transmission chain and a sprocket body that is fitted into a transmission shaft. The sprocket body is provided with an arcuate spline fitting portion that can move relative to the axis of the transmission shaft in an arcuate manner.

[Function] This sprocket has an arc-shaped spline fitting part that can move relative to the axis of the transmission shaft in an arc, so that the conventional direction of the transmission chain is aligned with the axis of the transmission shaft. When the gear is displaced at a desired angle, the meshing portion changes direction along the 1IH1j direction of the transmission chain, so that a natural meshing state with the transmission chain can be obtained.

[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings of FIGS. 1 to 5.

In the figure, reference numeral 1 indicates a driving sprocket attached to a width shaft 5 of a working machine 3, and a crawler sprocket 9 for driving a crawler 7 is fixed to the axle 5.

One end of an endless transmission chain 11 is layered on the drive sprocket 1, and the other end of the chain 11 is layered on a transmission sprocket 15 attached to a drive shaft 13. It comes to be driven by power from an engine (not shown) attached to 17.

The drive sprocket 1 consists of one meshing part that meshes with the transmission chain 11, and a sprocket body 27 that is fitted onto the axle 5 and fixed to the flange 21 with bolts 25. The meshing part 19 and the sprocket body 27 are , are engaged via an arcuate spline fitting portion 29 centered on the axis W of the axle 5.

As shown in FIG. 1, the two spline fitting portions are formed on the inner surface of one of the mating portions and have a male spline 31 formed in an arc shape around the axis W on the outer periphery of the spline main body 27, as shown in FIG. 31 and an arcuate female spline 33 that engages with the spline 31, and the engaging portion 19 can be displaced within the male spline 31 area of the spline body 27 at a desired angle.

Further, the base portion 37 of the engaging portion 19 is formed separately from the throat portion 35, and is formed so that it can be divided into two along the dividing line P. This allows the female spline 33 of the base 37 to
can be fitted to the male spline 31 of the sprocket body 27.

Note that the bridge portion 35 is integrally assembled to the base portion 37 by forced press-fitting.

In FIG. 5, reference numeral 39 denotes a hydraulic device that controls the body 17 so that it can move up and down with the hinge 41 as a fulcrum. are connected to the bottom of the body 17, respectively.

In the structure configured in this way, for example, when the working machine 3 travels on an incline, the specimen 17 is rotated upward by the hydraulic device 39 with respect to the crawler 7, and the machine body 17 is maintained in a substantially horizontal state. At this time, the conventional direction of the transmission chain 11 layered on the driving sprocket 1 is displaced according to the inclination angle of the chain 17 as shown by the chain line in FIG. The fitting part 29 rotates the transmission chain 11 so that it faces in the conventional direction.

As a result, they mesh easily and correctly, and the power of the transmission chain 11 is reliably transmitted to the axle 5 via the drive sprocket 1.

3 and 4 show another embodiment of the driving sprocket 1. FIG.

The driving sprocket 1 of this embodiment is composed of one meshing part and a sprocket body 27, as in the previous embodiment, but an arcuate female spline 33 is provided inside the main body 27 of the sprocket 1. A male spline 31 that fits is formed on each spherical portion 5a of the width axis 5,
The spline fitting portion 29 is capable of relative arc-shaped movement about the axis ~V. As a result, the direction of the meshing portion 19 can be changed according to the displacement of the conduction chain 11, and correct meshing can be achieved without strain.

The spline body 27 can be divided into two parts along a dividing line P, and can be assembled by forcibly press-fitting the meshing part 19 after fitting into the spherical part 5a of the axle 5.

[Effects of the Invention] As explained above, according to the driving sprocket of the present invention, even if the layered direction of the transmission chain is displaced by a desired angle, the meshing portions can be meshed smoothly and correctly, and the meshing can be ensured. Good conduction can be obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the driving sprocket of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a sectional view similar to FIG. 1 showing another embodiment, and FIG. 4 is a side view of the same as above, and FIG. 5 is a schematic explanatory diagram of the present invention implemented in a working machine. Explanation of main drawing symbols 1... Drive sprocket 2... Axle (transmission shaft) 11... Transmission chain 27... Two sprocket bodies... Spline fitting part

Claims (1)

[Claims] A driving sprocket consisting of a meshing part that engages with a transmission chain and a sprocket body that is fitted onto a transmission shaft, wherein the sprocket body is fitted with an arcuate spline that allows relative movement in an arc around the axis of the transmission shaft. A driving sprocket characterized by having a joint.