CN201323739Y

CN201323739Y - Rotary position-limit mechanism of handlebar tube base for micro-tillage machine

Info

Publication number: CN201323739Y
Application number: CNU2008201005939U
Authority: CN
Inventors: 李进才; 张安洪
Original assignee: Chongqing Zongshen Technology Development and Research Co Ltd
Current assignee: Chongqing Zongshen Technology Development and Research Co Ltd
Priority date: 2008-11-17
Filing date: 2008-11-17
Publication date: 2009-10-14
Anticipated expiration: 2018-11-17

Abstract

The utility model relates to a rotary position-limit mechanism of a handlebar tube base for a micro-tillage machine. The mechanism includes a handlebar tube lower base and a handlebar tube upper base; a threaded sleeve is welded on the handlebar tube lower base; the handlebar tube upper base is mounted on the handlebar tube lower base through the threaded sleeve and a nut; a positioning pin sleeve is welded on the handlebar tube upper base; a position-limit gasket is sleeved on the threaded sleeve; a position-limit convex handle is arranged on the surface of the outer circumference of the threaded sleeve; and the distance between the end surface of the position-limit convex handle and the axis of the threaded sleeve is larger than the distance between the positioning pin sleeve and the axis of the threaded sleeve. The rotary position-limit mechanism has a compact and simple structure, and does not influence the appearance of the micro-tillage machine.

Description

Mini-size tillage machine handle pipe base rotary stopper mechanism

Technical field

The utility model relates to the rotary stopper mechanism of mini-size tillage machine handle pipe base.

Background technology

Mini-size tillage machine comprises parts such as handle pipe and handle pipe base, and the handle pipe base comprises handle pipe upper bed-plate and handle pipe lower bottom base.Handle pipe is to help for operator's both hands, and with the parts of control mini-size tillage machine direct of travel, it is hinged on the handle pipe upper bed-plate by axle.Restricted as if the operating space when using mini-size tillage machine, when needing the operator on the travel track of mini-size tillage machine, not control the mini-size tillage machine plowing direction, the operator only need adjust the relative rotation angle between handle pipe upper bed-plate and the handle pipe lower bottom base, can realize turning to of mini-size tillage machine.

Can produce relative rotation between handle pipe upper bed-plate and the handle pipe lower bottom base is to realize by such structure: be welded with on the handle pipe lower bottom base and have externally threaded thread bush, offer a through hole on the handle pipe upper bed-plate, thread bush passes this through hole from bottom to top, by spinning the handle pipe upper bed-plate is installed on the handle pipe lower bottom base with nut, by the control of dynamics that nut is spun, the handle pipe upper bed-plate is rotated under external force with respect to the handle pipe lower bottom base around thread bush.In order to guarantee the stationarity of handle pipe upper bed-plate rotation, be welded with bulge loop in the through hole of handle pipe upper bed-plate, make bulge loop and thread bush matched in clearance to increase the axial fit dimension of handle pipe upper bed-plate through hole and thread bush.On the handle pipe upper bed-plate, be welded with the alignment pin sleeve pipe, be provided with the alignment pin that is used to control relative rotation angle between the handle pipe Up/down base in it.

If rotary stopper mechanism is not set on mini-size tillage machine, then the handle pipe upper bed-plate can be done rotation greater than 360 ° of angles with respect to the handle pipe lower bottom base, yet, because the clutch stay cord on the mini-size tillage machine, gearshift stay cord and cable etc. all pass from thread bush, this will cause damage to these stay cords and cable.

As shown in Figure 7, on existing mini-size tillage machine, in order to realize that the handle pipe upper bed-plate is carried out limiting less than the rotation of 360 ° of angles, it is limited block of welding on the handle pipe upper bed-plate, on the handle pipe lower bottom base, weld a limited post simultaneously, distance between limited post and the thread bush axis is less than the distance between limited block end face and the thread bush axis, like this, when the handle pipe upper bed-plate rotates to certain angle with respect to the handle pipe lower bottom base, limited block stops limited post and can not continue to the rotation of same direction, thereby the anglec of rotation that makes the handle pipe upper bed-plate is less than 360 °.But such position-limit mechanism, because limited block and limited post all are to be welded on the handle pipe base, this has not only increased welding sequence, increases the manufacturing cost of mini-size tillage machine then, and limited block and limited post are welded on the outward appearance that will influence mini-size tillage machine on the handle pipe base.

The utility model content

The purpose of this utility model provides a kind of mini-size tillage machine handle pipe base rotary stopper mechanism simple in structure, utilizes existing device on the handle pipe upper bed-plate of mini-size tillage machine, comes the handle pipe upper bed-plate is carried out rotation restriction less than 360 ° of angles.

Mini-size tillage machine handle pipe base rotary stopper described in the utility model mechanism, comprise handle pipe lower bottom base and the handle pipe upper bed-plate that is positioned at its top, be welded with thread bush on the handle pipe lower bottom base, the handle pipe upper bed-plate is installed on the handle pipe lower bottom base by this thread bush and nut, on the handle pipe upper bed-plate, be welded with the alignment pin sleeve pipe, described thread bush is provided with step, axially offer draw-in groove at the thread bush threaded portion along thread bush, be set with limiting gasket on the thread bush, the limiting gasket inner circumferential surface is provided with boss, this boss is embedded in the described draw-in groove, the limiting gasket external peripheral surface is provided with spacing protruding handle, limiting gasket is fastened between described step and the nut, and the distance between spacing protruding pommel face and the thread bush axis is greater than the distance between alignment pin sleeve pipe and the thread bush axis.

The alignment pin sleeve pipe is the existing device that is used to install the alignment pin of handle pipe upper bed-plate positioning of rotating on the mini-size tillage machine, and it is vertically welded on the handle pipe upper bed-plate, is positioned at the thread bush next door.The boss of the limiting gasket of suit is embedded in the draw-in groove of thread bush on the thread bush, limiting gasket can not rotated with respect to thread bush, and the spacing protruding handle of limiting gasket can be used for stopping the alignment pin sleeve pipe in handle pipe upper bed-plate rotary course.

When the handle pipe of mini-size tillage machine drives the rotation of handle pipe upper bed-plate, alignment pin sleeve pipe on the handle pipe upper bed-plate is also in company with rotation, when the alignment pin sleeve pipe rotated to the spacing protruding handle place of limiting gasket, limited protruding handle resistance shelves can not continue to same direction rotation the handle pipe upper bed-plate.And the alignment pin sleeve pipe is during from spacing protruding handle one sideway swivel to the opposite side of spacing protruding handle, and the anglec of rotation of handle pipe upper bed-plate also can not surpass 360 °, and historical facts or anecdotes has showed carries out rotation restriction less than 360 ° of angles to the handle pipe upper bed-plate.

The utility model is owing to existing device---the alignment pin sleeve pipe that has utilized on the existing mini-size tillage machine, and only changing a limiting gasket (packing ring of original existence on the existing mini-size tillage machine device on the device of existing mini-size tillage machine, but shape is different), so structure is very simple; Because limiting gasket is directly installed on the thread bush,, can not cause adverse effect to the outward appearance of mini-size tillage machine so make the structure of position-limit mechanism very compact.

Description of drawings

Now in conjunction with the accompanying drawings the utility model is described in further detail.

Fig. 1 is the stereogram of mini-size tillage machine handle pipe base rotary stopper described in the utility model mechanism;

Fig. 2 is this rotary stopper mechanism stereogram after removing nut;

Fig. 3 and cutaway view through thread bush axis dissect after vertical along it for this rotary stopper mechanism;

Fig. 4 is the stereogram of limiting gasket;

Fig. 5 is the stereogram of thread bush;

Fig. 6 installs stereogram after the handle pipe for the handle pipe base;

Fig. 7 is the stereogram of existing mini-size tillage machine handle pipe base rotary stopper mechanism.

Embodiment

Extremely shown in Figure 5 as Fig. 1, this mini-size tillage machine handle pipe base rotary stopper mechanism comprises handle pipe lower bottom base 5 and is positioned at the handle pipe upper bed-plate 3 of its top, be welded with thread bush 1 on the handle pipe

lower bottom base

5,3 of handle pipe upper bases are installed on the handle pipe lower bottom base 5 by this thread bush 1 and nut 2.Be welded with alignment pin sleeve pipe 8 on handle pipe upper bed-plate 3, it is positioned at the next door of thread bush 1.Described thread bush 1 is provided with step 10, axially offer draw-in groove 7 at thread bush 1 threaded portion along thread bush 1, be set with limiting gasket 4 on the thread bush 1, limiting gasket 4 inner circumferential surfaces are provided with boss 9, this boss 9 is embedded in the described draw-in groove 7, limiting gasket 4 external peripheral surfaces are provided with spacing protruding handle 6, and limiting gasket 4 is fastened between described step 10 and the nut 2, and the distance between spacing protruding handle 6 end faces and thread bush 1 axis is greater than the distance between alignment pin sleeve pipe 8 and thread bush 1 axis.

Claims

1, mini-size tillage machine handle pipe base rotary stopper mechanism, comprise handle pipe lower bottom base (5) and be positioned at its top handle pipe upper bed-plate (3), be welded with thread bush (1) on the handle pipe lower bottom base, the handle pipe upper bed-plate is installed on the handle pipe lower bottom base by this thread bush and nut (2), on the handle pipe upper bed-plate, be welded with alignment pin sleeve pipe (8), it is characterized in that: described thread bush is provided with step (10), axially offer draw-in groove (7) at the thread bush threaded portion along thread bush, be set with limiting gasket (4) on the thread bush, the limiting gasket inner circumferential surface is provided with boss (9), this boss is embedded in the described draw-in groove, the limiting gasket external peripheral surface is provided with spacing protruding handle (6), limiting gasket is fastened between described step and the nut, and the distance between spacing protruding pommel face and the thread bush axis is greater than the distance between alignment pin sleeve pipe and the thread bush axis.