JP2007244223A - Rotary plower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary plower by opening an oiling port 12 at the upper part of a casing 5 pivoting a rotary-driving shaft 3 and power-inputting shaft 4 and transmitted with the power through a bevel gear mechanism 2, 2a, and installing an oiling plug 13 attached with a breather hole 13a at the oiling port 12 and prevent lubricating oil from leaking through the breather hole 13a. <P>SOLUTION: This rotary plower is provided by forming a first opening port 14 facing in sideways in a state of continuing from the oiling port 12 and a second opening port 14b facing vertically as branching in a casing 5 and making the lubricating oil entering into the first opening port 14 flow down from the second opening port 14b, while making the splash of the lubricating oil by the bevel gear mechanism 2, 2a not directly reach to the oiling port 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention belongs to the technical field of a rotary tiller for pulling and working by a towing work vehicle such as a tractor.

In general, in this type of rotary tiller, a rotary drive shaft and a power input shaft that are motively transmitted to each other via a bevel gear mechanism are supported by a casing. The casing includes a machine such as the bevel gear mechanism. Lubricating oil (oil) is filled to lubricate parts. In addition, an oil filler opening is formed in the upper part of the casing, and the oil filler opening is provided with an oil filler plug having a breather hole in order to cope with a change in oil temperature of the filled lubricating oil (oil) (for example, Patent Document 1).
Japanese Utility Model Publication No. 63-2404

  By the way, the above-mentioned conventional one simply plugs the oil filling port formed in the upper part of the casing with the oil filling plug, so that during operation, the splash of lubricating oil that is violently diffused and scattered by the rotating gear reaches the oil filling plug and lubricates There is a problem that oil leaks from the breather hole. Therefore, as shown in FIG. 4, a cross-sectionally L-shaped opening 14 is formed in the casing 5 in a state of continuing below the oil inlet 12 so that the scattered lubricating oil does not directly hit the oil stopper. Proposed to do. However, in such a case, the lubricating oil that scatters violently enters the opening 14 in the form of a bridge, and the entering lubricating oil reaches the oil filler plug due to the rise in the oil temperature and prevents oil leakage from the breather hole. There is a possibility that it cannot be solved, and here is a problem to be solved by the present invention.

  SUMMARY OF THE INVENTION The present invention was created in view of the above circumstances and has been created for the purpose of solving these problems. The invention of claim 1 is directed to a rotary drive shaft and a power input that are transmitted through a bevel gear mechanism. In a rotary tiller configured by opening a lubrication port in the upper part of a casing that supports the shaft and providing a lubrication plug with a breather hole in the lubrication port, the casing continues in the casing below the lubrication port. The rotary tiller is characterized in that the first opening in the horizontal direction and the second opening in the vertical direction are branched.

  By making it the invention of claim 1, the splash of the lubricating oil diffused violently by the bevel gear by the first opening which is turned sideways in a state of continuing downward from the oil filling port does not directly reach the oil filling port. However, the lubricating oil that has entered the opening does not reach the lubricating plug because it flows out from the vertical second opening formed below the lubricating port, and as a result, the lubricating oil leaks from the breather hole. Can be prevented.

  Next, embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a side rotary type rotary tiller that is pulled by a towing vehicle such as a tractor to perform a tilling work. The rotary tiller 1 is driven by a bevel gear mechanism 2 and 2a. The casing 5 is configured to support the power input shaft 3 and the rotary drive shaft 4. The tip of the rotary drive shaft 4 is pivoted on a chain case 6 provided on one side of the rotary tiller 1 in the left-right direction. It is supported. The inside of the chain case 6 is configured to transmit the power of the rotary drive shaft 4 to the rotary shaft 8 via the chain transmission mechanism 7 so that the field can be cultivated by rotation of the cultivating claws 9 provided on the rotary shaft 8. These are the same as before. In the drawing, 10 is a side plate provided on the opposite side of the chain case 6, and 11 is a drive shaft case provided between the casing 5 and the chain case 6 so as to cover the rotary drive shaft 4.

  In the upper part of the casing 5, an oiling port 12 is provided on the opposite side (side plate 10 side) to the rotary drive shaft 4 being supported, and a breather hole 13 a is provided in the oiling port 12. An oil plug 13 provided at the upper end is detachably provided. Reference numerals 14 and 14b denote first and second openings formed in the casing 5 in a state of continuing downward from the oil inlet 12, and the first opening 14 is a rotation of the bevel gear 2a provided on the rotary drive shaft 4. The bevel gear 2a is formed so as to be inclined laterally with the side facing the bevel gear 2a opened in a tilted state substantially along the rotation trajectory of the bevel gear 2a in a state of being located outward and above the trajectory. It is possible to prevent the splash of the lubricating oil that has been vigorously stirred from directly splashing into the oil inlet 12. Furthermore, a vertically-facing second opening 14b is opened below the oil filler 12 (directly below in the present embodiment) in a state branched from the first opening 14, and the first opening 14 has an inside. The lubricating oil that has entered can be discharged from here.

  In the embodiment of the present invention configured as described, the splash of lubricating oil vigorously stirred by the bevel gear 2a during the tilling work has the lower piece 14a forming the first lateral opening 14. Therefore, it is possible to avoid the lubricating oil that has been directly scattered from reaching the breather hole 13a and leaking out, but the lubricating oil that has entered the first opening 14 is not 12 is prevented from reaching the lubrication port 12 due to flowing out of the vertical second opening 14b that is branched below the lubrication port 12, thereby causing the lubricating oil to leak from the breather hole 13a. Can be further prevented.

It is the fragmentary sectional front view which abbreviate | omitted a part of rotary tillage apparatus. It is a longitudinal cross-sectional rear view of a casing site | part. It is a standing sectional side view of a casing part. It is a longitudinal cross-section rear view of the casing part before reaching this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotary plowing device 3 Power input shaft 4 Rotary drive shaft 5 Casing 12 Oil inlet 13 Oil stopper 13a Breather hole 14 First opening 14a Lower piece 14b Second opening

Claims (1)

  A rotary tiller that is configured by opening an oil filler port on the upper part of a casing that supports a rotary drive shaft and a power input shaft that are driven by a bevel gear mechanism and providing a breather plug with a breather hole at the oil filler port. The rotary tiller according to claim 1, wherein the casing has a first opening that is horizontally oriented and a second opening that is vertically oriented in a state of being continued below the lubrication port.

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