JP2960862B2 - Oscillating sorting case drive structure of threshing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a structure for driving a swing sorting case of a threshing apparatus.

[0002]

2. Description of the Related Art As a swing sorting case drive structure of a threshing apparatus, as shown in FIG. 6, a free end portion of a swing arm 16 supported on left and right side plates 12 so as to be able to swing back and forth is connected to a connecting shaft 17.
The swing selection case 7 is pivotally connected to the connection shaft 17, and a crank shaft 18 rotatably supported on the side plate 12 and the swing arm 16 are linked to each other by a link 19. Have been. In this type of swing sorting case drive structure, it is necessary to balance the dynamics in order to reduce the drive vibration. For example, as shown in FIG. 6, a balance weight 21 is connected to the eccentric shaft portion 18b of the crankshaft 18. As shown in FIG. 7, the balance weight 21 is connected to the outer end of the crankshaft 18.

[0003]

However, according to the structure shown in FIG. 6, if the mounting accuracy of the balance weight 21 is poor, the bearing of the crankshaft 18 may be damaged early due to vibration. In order to increase the cost, highly accurate component processing and assembly have been required. The structure shown in FIG. 7 requires a large space for rotating the balance weight 21 because the balance weight 21 rotates outside the threshing apparatus side plate 12, and poses a danger during maintenance while rotating and driving. There was a problem. An object of the present invention is to solve such a problem of the conventional structure.

[0004]

The invention according to claim 1 is
The free ends of the swing arms, which are swingably supported on the left and right side plates, are connected by a connecting shaft. In the swing selection case drive structure of the threshing device in which the swing arm and the swing arm are linked and connected by a link, the crankshaft is connected across a pair of left and right rotation shafts supported by left and right side plates and both rotation shafts. And the eccentric shaft part
A balance weight is formed integrally with the rotating shaft portion.

According to a second aspect of the present invention, in the first aspect of the present invention, the balance weight is made up of a weight body integrally formed with the rotary shaft portion and a weight portion detachably attached to the weight body. It is characterized by having been constituted.

According to a third aspect of the present invention, in the second aspect of the present invention, the weight portion is connected to the weight main body so as to be changeable in position.

[0007]

According to the first aspect of the present invention, since the balance weight is integrally formed on the rotating shaft portion of the crankshaft, dynamic balance can be achieved without requiring a specially high-accuracy balance weight assembling process. .

According to the second aspect of the present invention, the weight of the entire balance weight can be changed by exchanging weight portions having different sizes with respect to the weight main body.

According to the third aspect of the present invention, it is possible to change the mass of the balance weight as a whole by exchanging weight portions having different sizes with respect to the weight main body, and to change the connection position of the weight portion to the weight main body. By changing, the rotation phase of the entire balance weight can also be changed.

[0010]

According to the first aspect of the present invention, since a dedicated weight mounting member is not required, the number of parts can be reduced, and the use of an integrated balance weight requires a complicated assembly process. It is possible to achieve a dynamic balance with high accuracy and a highly durable drive structure.

According to the second aspect of the present invention, the effect of the first aspect of the present invention is provided, and at the same time, the mass of the entire balance weight is easily changed to be used as a drive structure of a swing sorting case of various specifications. it can.

According to the third aspect of the present invention, it is possible to change not only the mass of the balance weight as a whole but also the phase thereof, and it is possible to more suitably cope with the drive structure of the swing sorting case of various specifications. , And the function is further enhanced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a cross section of a threshing apparatus mounted on a whole-culm-in type combine. The threshing apparatus 1 transfers a cut culm supplied to a front portion of a handling chamber 3 by a feed conveyor 2 backward by a spiral tooth 5 while threshing by an axial-flow type handling cylinder 4 and lowering the handling chamber 3. The threshing material leaked from the concave 6 is received by the rocking sorting case 7 and sieved and sorted while being rocked rearward. 9 and carried out of the machine, and the second product collected in the second product collection unit 10 is returned to the swing sorting case 7 for re-sorting, and the concave 6 is handled without leaking. It is configured to discharge straw waste and the like that have reached the end of 3 out of the machine.

The front part of the swinging and sorting case 7 is supported by guide rails 13 provided on the inner surfaces of the left and right side plates 12 of the threshing apparatus 1 via rollers 14 so as to be able to reciprocate back and forth linearly. The rear part of the moving sorting case 7 is operatively connected to the drive mechanism 15 in a structure described below.

FIG. 2 shows the detailed structure of the driving mechanism 15. That is, the left and right side plates 12 are provided with a swing arm 16 that can swing back and forth about a fulcrum a. A swing shaft 16 connecting the free ends of the swing arms 16 is connected to the swing sorting case 7. The rear is pivotally connected. Further, the crankshaft 1 rotatably supported on the left and right side plates 12.
The eccentric portion 8 and each swing arm 16 are linked to each other by a link 19, and the swing selection case 7 is rotated at a constant stroke by rotating the crank shaft 18 to swing the swing arm 16 at a constant amplitude. It is designed to be driven back and forth.

The crankshaft 18 includes a pair of left and right rotary shaft portions 18a supported on the left and right side plates 12 via bearing brackets 20, and an eccentric shaft portion 18b connected across both rotary shaft portions 18a. One end of the link 19 is pivotally connected near both ends of the eccentric shaft portion 18b.

A balance weight 21 is formed integrally with the rotary shaft 18a at a phase opposite to that of the eccentric shaft 18b. This balance weight 2
1 is a weight main body 21 integrally formed with the rotation shaft portion 18a.
a, and a weight portion 21b detachably connected to the weight portion 21b. The weight of the balance weight 21 can be arbitrarily set by exchanging the weight portion 21b having a different size. It has become.

As shown in FIG. 4, an opening 22 large enough to allow the balance weight 21 to pass therethrough is formed in the side plate 12 which supports the rotating shaft portion 18a of the crankshaft 18 via a bearing bracket 21. When assembling the pre-assembled drive mechanism 15 between the left and right side plates 12, the drive mechanism 15 is inclined, one end of the drive mechanism 15 is passed through the opening 22, and the other end of the drive mechanism 15 is inserted into the side plate 12. After that, the entire drive mechanism 15 is made horizontal and installed between the left and right side plates 12 via the bearing bracket 21.

[Alternative Embodiment] As shown in FIG. 5, a plurality of bolt connection holes 23 are formed in the weight main body 21a so that the weight portions 21b can be connected so that their positions can be changed. The phase can be changed.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a longitudinal side view showing an axial flow type threshing apparatus.

FIG. 2 is a developed plan view showing a drive mechanism of the swing sorting case.

FIG. 3 is a partially cutaway side view of the drive mechanism of the swing sorting case.

FIG. 4 is a side view showing a shaft support of the crankshaft.

FIG. 5 is a partially cutaway side view showing another embodiment of the balance weight.

FIG. 6 is an exploded plan view showing a conventional example of a drive mechanism of a swing sorting case.

FIG. 7 is a developed plan view showing another conventional example of the drive mechanism of the swing sorting case.

[Explanation of symbols]

 7 swing sorting case 12 side plate 16 swing arm 17 connecting shaft 18 crankshaft 18a rotating shaft portion 18b eccentric shaft portion 19 link 21 balance weight 21a weight body 21b weight portion

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 57-20838 (JP, U) Japanese Utility Model Utility Model Hei 3-129031 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A01F 12/30-12/395

Claims (3)

(57) [Claims] A free end of a swing arm (16) supported on left and right side plates (12) so as to be able to swing back and forth is connected to a connecting shaft (1).
7), a swing sorting case (7) is pivotally connected to the connecting shaft (17), and a crank shaft (18) rotatably supported on the side plate (12) and the swing arm (16). And a swinging case driving structure of a threshing device in which the crankshaft (18) is connected to the right and left side plates (12) by a link (19). Threshing characterized by comprising an eccentric shaft (18b) connected across both rotating shafts (18a), and a balance weight (21) integrally formed with the rotating shaft (18a). Oscillating sorting case drive structure of the device. 2. A weight body (2) integrally formed with the balance shaft (18a) by the balance weight (21).
2. The device according to claim 1, further comprising: 1a); and a weight portion (21b) detachably attached to the 1a).
The swing sorting case drive structure of the threshing apparatus described in the above. 3. The swing sorting case driving structure of a threshing apparatus according to claim 2, wherein the weight portion (21b) is connected to the weight body (21a) so as to be changeable in position.