CN2427040Y - Rotary cultivator with positive-contrary spades - Google Patents

Abstract

The utility model relates to a rotary cultivator with positive-contrary spades, which comprises rotary cultivating components composed of a three-point type suspension bracket, a universal joint, a transmission shaft, an intermediate gear box, a side edge gear box, a cutter shaft and a curved cutter, a machine frame, a cover casing and a carriage. The utility model is characterized in that the intermediate gear box is a gear transmission box provided with a reversing mechanism, the gear transmission box comprises an input shaft driven by the universal joint and the transmission shaft, a pair of small straight gears with a connecting part of a jaw clutch, movable reverse sleeves with the connecting part of the jaw clutch, a pair of composite gear sets, and a pair of big bevel gears, wherein, the small straight gears are sheathed on the end surface of a corresponding wheel hub on the input shaft, the movable reverse sleeves are arranged between the small straight gears and are connected with two end surfaces of the input shaft with a spline, the composite gear sets are composed of big coaxial straight gears and small bevel gears, and the big bevel gears are respectively meshed with small bevel gears in the composite gear sets and are connected with an output shaft.

Description

Positive upmilling rotovator

The utility model is about a kind of agricultural machinery, particularly about rotary tillage machinery.

Compare with the plough with thousands of years long histories, rotovator only has hundred years of development histories.It only is used for the farming in flower garden in early days, and the last century L twenties type rotary blade just expands to the farming in land for growing field crops after coming out.After, Japan develops the thallium cutter that is applicable to plough in the paddy field again, makes rotovator become basic facility in the underwater cultivation.China through research and development for many years, has formed the mounted ortary cultivator series supporting with wheel tractor behind the rotovator of the mid-50 introduction and walking tractor matching, these rotovators have become China and ploughed one of the main facility on whole ground.Their basic structure comprises: the bikini hanger bracket that is connected with the tractor hitch, the Cardan shaft that one end links to each other with tractor motive power output shaft, the center tooth case that driving bevel gear is connected with the Cardan shaft other end, export driven off by shaft side tooth case by the center tooth case, the cutter shaft that one end is connected with side tooth case output with spline, be arranged on the tulwar on the cutter shaft, the frame that comprises side plate and two spacer tubes that respectively the center tooth casing linked to each other with side tooth casing and side plate, be arranged on the case of cutter shaft top, with the planker that is hinged on the case rear.Press the difference of cutter shaft direction of rotation, the position of tulwar incision soil is also different, promptly so-called just milling or upmilling, and their farming effect is also different certainly.And existing rotovator generally can only carry out the milling soil of single direction; Promptly can't be on same rotovator, but cutter shaft not only clockwise rotate but also can anticlockwisely rotate.And the reality of agricultural tillage needs just milling sometimes, and needs upmilling could satisfy agriculture requirement sometimes.This just need be provided with two rotovators with different cutter shaft rotation directions simultaneously, has also just improved equipment investment, increases peasant burden.

The purpose of this utility model is to provide a kind of positive upmilling rotovator, it can overcome the cutter shaft that has rotovator now can only be by the shortcoming of a direction rotation, can change the direction of rotation of cutter shaft easily by the requirement of agro-farming operation, reach and just mill or the purpose of upmilling soil.

The purpose of this utility model is achieved in that a kind of positive upmilling rotovator, comprise the bikini hanger bracket, Cardan shaft, the center tooth case, side tooth case, the rotary ploughing part that cutter shaft and tulwar are formed, frame, case and planker, it is characterized in that described center tooth case is the gear that is provided with changement, it comprises the power shaft that is driven by Cardan shaft, the wheel hub end face that is nested with correspondence on this power shaft is provided with a pair of small Spur gear of jaw clutch joint portion, be arranged between this a pair of small Spur gear and be attached on the power shaft both ends of the surface with spline and be respectively equipped with jaw clutch joint portion and reversing cover movably, the a pair of composite teeth wheels of forming by coaxial large straight gear and bevel pinion, respectively with these a pair of composite teeth wheels in bevel pinion engagement and bevel gear wheel that be connected with output shaft.

Above-mentioned positive upmilling rotovator is characterized in that: the case rear fixedly installs the grizzly bar of the planker covering that is hinged; This grizzly bar be shaped as the two decentraction circular arcs that join, the spacing 60～90mm of grizzly bar is 50～60mm apart from the gap of tulwar point of a knife movement locus.

Above-mentioned positive upmilling rotovator is characterized in that: described tulwar is the positive upmilling blade with two-sided cutting edge.

The utlity model has can a machine just realizing, the characteristics of the ploughing work of two kinds of different agriculture requirements of upmilling, greatly reduce the fixed investment burden of peasant's facility.Not only just, the conversion of upmilling is convenient, as long as move the reversing handle on the center tooth case lightly; And original rotovator structure do not made significant movement, so easily manufactured, the interchangeability of parts is strong, is beneficial to maintenance.

Below in conjunction with accompanying drawing this is realized novelly further narrating.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is Fig. 1 institute schematic top plan view (removing the universal joint power shaft).

Fig. 3 is the utility model center tooth box structure schematic diagram.

The positive upmilling tulwar of Fig. 4 structural representation.

Fig. 5 is Fig. 4 left view.

The utility model comprises bikini hanger bracket 2, Cardan shaft 1, center tooth case 3, side tooth case 10, rotary ploughing part 9, frame, case 5 and planker 7 as depicted in figs. 1 and 2.The right frame pipe 14 that frame comprises the side plate 15 of left frame pipe 12 that center tooth case 3 is linked to each other with side tooth case 10, supporting rotary ploughing part 9, center tooth case 3 and side plate 15 are joined.Bikini hanger bracket 2 is fixed on this frame.Planker 7 is except that the rear end that is hinged on case 5, and also hinged setting has two struts 6 of spring; This strut 6 penetrates respectively in the slider bore that is fixed on support arm 4 ends on the left and right frame pipe 12,14.The reversing cover 19 that center tooth case 3 comprises the power shaft 17 (Fig. 3) that driven by Cardan shaft 1, be nested with a pair of small Spur gear 18 and 20 on power shaft 17, be connected with power shaft 17 with spline, the large straight gear 23 of a pair of coaxial setting and composite teeth wheels 22 and 26 that bevel pinion 21 is formed, be arranged on the bevel gear wheel 25 of output shaft 24 1 ends.A pair of small Spur gear 18 and 20 respectively with a pair of composite teeth wheels 20 and 26 in large straight gear 21 engagement; And the bevel pinion 21 in each composite teeth wheels 22 and 26 is meshed with bevel gear wheel 25 respectively.Reversing cover 19 can move in two small Spur gears 18 and 20 on power shaft 17, and two halves joint portion A ' and the A of dog clutch A are set respectively between its both ends of the surface and a pair of small Spur gear 18 and 20 corresponding wheel hub end faces ".The other end of output shaft 24 then is connected with gear spline in the side tooth case 10.Therefore, when the reversing handle of stirring on the center tooth case 3 13, reversing cover 19 is moved to little straight-tooth 18, wait to be arranged on the dog clutch A of their end faces chimeric after, power shaft 1 by small Spur gear 18, drive bevel gear wheels 25 through composite teeth wheels 26 and rotate to a direction with its engagement; Force reversing cover 19 to separate with small Spur gear 18 and engage with small Spur gear 20 if stir reversing handle 13, then bevel gear wheel 25 rotation directions are opposite.So just can realize rotary ploughing part 9 " just milling " or " upmilling " easily.The tulwar that is arranged on rotary ploughing part 9 cutter shafts is the positive upmilling blade 27 (Fig. 4～5) with two-sided cutting edge 28.Be set with grizzly bar 8 below cover cap 5 rear portions, planker 7, each grizzly bar has the profile that the two decentraction circular arcs that join constitute, and the spacing between the grizzly bar is 60～90mm, and the distance of grizzly bar 8 and positive upmilling blade 27 point of a knife movement locus is 50～80mm.The movement locus of positive upmilling blade 27 points of a knife and the distance of case are 50～60mm.When upmilling, will lift (as shown in phantom in Figure 1) on the planker 7.In addition, the front lower place of frame also is provided with support bar 11, balanced support when being placed in level land or the hangar for the utility model.

Claims (3)

1, a kind of positive upmilling rotovator, comprise the bikini hanger bracket, Cardan shaft, the center tooth case, side tooth case, the rotary ploughing part that cutter shaft and tulwar are formed, frame, case and planker, it is characterized in that: described center tooth case is the gear that is provided with changement, it comprises the power shaft that is driven by Cardan shaft, the wheel hub end face that is nested with correspondence on this power shaft is provided with a pair of small Spur gear of jaw clutch joint portion, be arranged between this a pair of small Spur gear and be attached on the power shaft both ends of the surface with spline and be respectively equipped with jaw clutch joint portion and reversing cover movably, the a pair of composite teeth wheels of forming by coaxial large straight gear and bevel pinion, respectively with these a pair of composite teeth wheels in bevel pinion engagement and bevel gear wheel that be connected with output shaft.

2, positive upmilling rotovator according to claim 1 is characterized in that: the case rear fixedly installs the grizzly bar of the planker covering that is hinged; This grizzly bar be shaped as the two decentraction circular arcs that join, the spacing 60～90mm of grizzly bar is 50～60mm apart from the gap of tulwar point of a knife movement locus.

3, positive upmilling rotovator according to claim 1 is characterized in that: described tulwar is the positive upmilling blade with two-sided cutting edge.

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