CN201457061U

CN201457061U - Power output safety protective device of tractor

Info

Publication number: CN201457061U
Application number: CN2009201225702U
Authority: CN
Inventors: 胡盛飞; 楼刚刚; 葛萍
Original assignee: JOHN DEERE (NINGBO) AGRICULTURAL MACHINERY CO Ltd
Current assignee: JOHN DEERE (NINGBO) AGRICULTURAL MACHINERY CO Ltd
Priority date: 2009-06-16
Filing date: 2009-06-16
Publication date: 2010-05-12
Anticipated expiration: 2019-06-16

Abstract

The utility model relates to a power output safety protective device of a tractor, comprising a tractor starting circuit, a power output operating mechanism and a power output mechanism consisting of a power output driven wheel, a power output driven shaft, a spline sliding sleeve and a spline sliding sleeve, wherein the power output operating mechanism is also provided with an operating lever limiting device; the limiting device consists of a limiting plate arranged on an operating bracket, a limiting groove arranged on the limiting plate and a limiting spring with one end fixedly connected with an operating lever; a neutral position starting switch movably contacted with a shifting fork contact and a switch contact rod is connected between the output end of a starting relay and the input end of an ignition switch; and a clamping finger at one end of a shifting fork is arranged on the spline sliding sleeve on the power output driven shaft. The power output safety protective device can prevent the power output shafts from starting the tractor under combined state, and the added limiting plate and the power output neutral position switch of the operating lever can effectively prevent the error operation of the power output of the power output shafts, thus effectively preventing unexpected accidents and injury.

Description

Tractor dynamic power output safety fender guard

Technical field

The utility model relates to the power take-off shaft of tractor motive power output shaft neutral gear starting guard equipment, particularly trac. and the inter locking gear of trac. starting circuit.

Background technology

At present, use more and more widely in agricultural at field machine, the familiarity that operating personal is operated machine is inequality, causes the various devices that the personage is damaged for avoiding some because of maloperation, and it is important to seem all the more in the design of field machine.When the power take-off control lever of current general field machine is not in neutral gear, be that power take-off shaft is under the state of combination, inserting key also can fire an engine, particularly trac. is under the state of combination at power take-off shaft, fire an engine, the motion of drive farm implements may cause unexpected injury near the personnel trac. farm implements; Also have the trac. operator driving or maloperation power take-off control lever unintentionally in the trac. process up and down, also may cause unexpected injury near the personnel trac. farm implements.

Summary of the invention

For the contingency that prevents that trac. from causing because of maloperation when starting, the utility model provides a kind of power take-off shaft neutral gear start-up safety and protection device, can effectively address this problem.

The design plan that its technical matters that solves the utility model adopts is: tractor dynamic power output safety fender guard, comprise by storage battery, the trac. starting circuit that actuating motor and ignition lock are formed, by joystick, lever, pull bar; rocking arm; the steering unit of the takeoff output that dwang and shift fork are formed; by the takeoff output flower wheel; the takeoff output driven shaft; the power take-off mechanism that spline engagement cover and spline engagement block set are formed; it is characterized in that also being provided with in the takeoff output steering unit joystick inhibiting device; described inhibiting device is by being located at the positioning plate of handling above the support is located at the position-limited trough on the positioning plate and the limit spring composition of an end and joystick Joint; Be connected by shift fork contact and the movable neutral gear fire switch that contacts of switch feeler lever between the input end of the mouth of starting relay and ignition lock, the card of described shift fork one end refers to that the spline engagement that is located on the described takeoff output driven shaft puts.

Increase the joystick inhibiting device in the takeoff output steering unit, set up positioning plate and with limit spring joystick is fixed in each gear groove, operational power output joystick firmly overcomes the limit spring pulling force, just can be articulated to work gear or Neutral Position.

Be in neutral gear or other gears by operational power output joystick, promptly power take-off shaft is in released state and still is in bonding state, and the takeoff output neutral switch is made corresponding action, makes the switch closure or the disconnection of takeoff output neutral switch circuit.Export joystick when tractor dynamic power and be not in the neutral gear of gear groove, promptly power take-off shaft is under the bonding state, and the takeoff output neutral switch disconnects, and the trac. starting circuit is in off-state, can't start trac.; Export joystick when tractor dynamic power and be under the neutral state, promptly power take-off shaft is under the released state, takeoff output neutral switch closure, and trac. starting circuit closure, can start trac. this moment.

The beneficial effects of the utility model are, takeoff output neutral gear fire switch can prevent that power take-off shaft from starting trac. under bonding state, and set up the positioning plate and the takeoff output neutral switch of joystick, can effectively prevent the takeoff output of maloperation power take-off shaft, effectively prevent to produce the contingency injury.

Description of drawings

Fig. 1 is takeoff output handle structure figure.

Fig. 2 is the birds-eye view of Fig. 1.

Fig. 3 and Fig. 4 are takeoff output casing cutaway views.

Fig. 5 is the J-J cutaway view of Fig. 3.

Fig. 6 and Fig. 7 are the S-S section-drawings of Fig. 5, and be corresponding with Fig. 3 and Fig. 4 state respectively.

Fig. 8 is starting circuit figure.

The specific embodiment

Below in conjunction with accompanying drawing a kind of embodiment of the present utility model is further described.

Shown in Fig. 1～2, the takeoff output steering unit comprises power take-off control lever 1, positioning plate 2, lever 3, pull bar 4 and rocking arm 7, one end of lever 3 is connected with the lower end of power take-off control lever 1, the other end of lever 3 is connected with an end of pull bar 4, and the other end of pull bar 4 is connected with rocking arm 7 upper ends.Establish E word position-limited trough 5 on the positioning plate 2, power take-off control lever 1 lower end is embedded in the position-limited trough 5, power take-off control lever 1 end is fixed in the position-limited trough 5 by limit spring 6, when pulling power take-off control lever 1 overcomes the pulling force of limit spring 6, in the cross spacing groove before, during and after can releasing or draw in, promptly be articulated on different operating gear or the Neutral Position.

Shown in Fig. 3～7; rocking arm 7 is secured to an end of dwang 9 by resilient pin 8; other end of dwang 9 affixed one vertical suspension rod 10; vertical suspension rod 10 lower ends are fixed in the middle of the shift fork 11; end of shift fork 11 establish one with neutral switch feeler lever 14 contacted shift fork contacts 13; shift fork 11 is by shift fork fixed link 16 horizontal supports that are fixed on the box body wall; shift fork 11 can be on shift fork fixed link 16 parallel motion, the shift fork card that is located at shift fork 11 ends refer to 12 also in company with moving of shift fork 11 at takeoff output driven shaft 23 top offsets.Takeoff output flower wheel 20 on the described takeoff output driven

shaft

23 and 24 centre are provided with axial splines, be provided with axial splines 25 in the inboard of flower wheel 20 and 24, establish spline engagement block set 22 on the axial splines, overlap 21 in the spline engagement that the outer periphery of spline engagement block set 22 can be stirred, overlap 21 in the spline engagement that the outer periphery of described axial splines 25 can be stirred, the shift fork card of shift fork 11 1 ends refers to that 12 are clipped in spline engagement and overlap 21 excircles and horizontal slip thereon, and spline engagement cover 21 pushes the peripheries engagement of axial splines 25.

Referring to shown in Figure 8, the trac. starting circuit is by storage battery E, actuating motor M, starting relay J, takeoff output neutral switch 15, indicator lamp L and ignition lock 26 are formed, establish the indicator lamp L of indication power take-off shaft work between storage battery and the ignition lock 26, takeoff output neutral switch 15 is connected on the input end of starting relay and the mouth of ignition lock 26, wherein K1 is an indicator lamp current return master cock, K2 is a starting relay magnetic coil current return master cock, K3 is the pilot lamp power master cock, K4 is a starting relay magnetic coil power control switch, between K switch 2 and K3, connect indicator lamp L, indicator lamp L is bright when K2 disconnects K1 and K3 closure, the indication power take-off shaft is in running order, can't start trac..

Sketch the working process of present embodiment below in conjunction with Fig. 1～Fig. 8.

Under the free state shown in Figure 1, power take-off control lever 1 is under the tension of limit spring 6, be limited in the medial launder of position-limited trough 5 of positioning plate 2, it is Neutral Position, can't move to front or rear, as shown in Figure 6, shift fork contact 13 contacts with neutral switch feeler lever 14, compress takeoff output neutral switch 15 simultaneously, K switch 2 closures of takeoff output neutral switch 15, insert trac. key and rotation this moment, the K switch 3 of ignition lock 26 and K switch 4 are closed in succession, trac. starting. the shift fork card refers to that 12 are positioned at the midway location of takeoff output driven shaft 23 with spline engagement cover 21 among this moment Fig. 3, takeoff output driven gear 20 overlaps 21 with 24 axial splines 25 with spline engagement and does not contact, the trac. starting, takeoff output driven shaft 23 does not and then rotate, no power takeoff. after the trac. starting, propulsion power output joystick 1 overcomes the pulling force of spring 6, output power joystick 1 to extrapolation, push forward or backward in another positioning groove of positioning plate 2 position-limited troughs 5, driving lever 3 rotates, under the pulling of pull bar 4, drive rocking arm 7; drive driving levers 9 by resilient pin 8 during rocking arm 7 swings and rotate; driving lever 9 drives vertical suspension rod 10 swings; thus shift fork contact 13 is not contacted with neutral switch feeler lever 14; and K switch 2 disconnects; be state shown in Figure 7; meanwhile promote spline engagement and overlap 21 horizontal slidings; spline engagement cover 21 is meshed; if at this moment driving engine is at starting state; referring to Fig. 4 and shown in Figure 5; takeoff output imput shaft 17 is being with takeoff

output driving gear

18 and 19 to rotate under the driving of driving engine; takeoff output driven gear 20 and 24 rotates with takeoff

output driving gear

18 and 19 engagements respectively; because the spline engagement cover also meshes with spline engagement block set 22 for 21 this moments; takeoff output driven shaft 23 rotates under the spline effect of spline engagement block set 22, so dynamic output with axial splines 25 on takeoff output flower wheel 20 or 24.

Under trac. is flameout state, when power take-off control lever 1 is not in the middle medial launder of position-limited trough 5 of positioning plate 2, be that takeoff output is not in Neutral Position, neutral switch feeler lever 14 moves forward under the effect of takeoff output neutral switch 15 contained spring power, K switch 2 in the takeoff output neutral switch 15 disconnects, K switch 1 closure, it is state shown in Figure 7, insert trac. key and rotation this moment, source switch K3 and K4 are closed in succession, power take-off shaft indicator lamp L on the tractor meter dish is bright, but, can't start trac. because K switch 2 disconnects.

Claims

1. tractor dynamic power output safety fender guard, comprise by storage battery, the trac. starting circuit that actuating motor and ignition lock are formed, by joystick, lever, pull bar; rocking arm; the steering unit of the takeoff output that dwang and shift fork are formed; by the takeoff output flower wheel; the takeoff output driven shaft; the power take-off mechanism that spline engagement cover and spline engagement block set are formed; it is characterized in that also being provided with in the takeoff output steering unit joystick inhibiting device; described inhibiting device is by being located at the positioning plate of handling above the support is located at the position-limited trough on the positioning plate and the limit spring composition of an end and joystick Joint; Be connected by shift fork contact and the movable neutral gear fire switch that contacts of switch feeler lever between the input end of the mouth of starting relay and ignition lock, the card of described shift fork one end refers to that the spline engagement that is located on the described takeoff output driven shaft puts.

2. tractor dynamic power output safety fender guard according to claim 1; axial splines is established in the centre that it is characterized in that the takeoff output flower wheel (20 and 24) on the described takeoff output driven shaft (23); establish spline engagement block set (22) on the axial splines; at the spline engagement cover (21) that the outer periphery of described spline engagement block set (22) can be stirred, an end shift fork card of shift fork (11) refers to that (12) are clipped on the excircle of spline engagement cover (21).

3. tractor dynamic power output safety fender guard according to claim 1; the inboard that it is characterized in that the takeoff output flower wheel (20 and 24) on the described takeoff output driven shaft (23) is provided with axial splines (25); at the spline engagement cover (21) that the outer periphery of described axial splines (25) can be stirred, an end shift fork card of shift fork (11) refers to that (12) are clipped on the excircle of spline engagement cover (21).

4. tractor dynamic power output safety fender guard according to claim 1; it is characterized in that described rocking arm (7) is affixed by resilient pin (8) and dwang (9) one ends; the other end affixed one vertical suspension rod (10) of dwang (9), vertical suspension rod (10) lower end is fixed in the middle of the shift fork (11).

5. tractor dynamic power output safety fender guard according to claim 1, an end that it is characterized in that described shift fork (11) establish one with the contacted shift fork contact of neutral switch feeler lever (14) (13).

6. tractor dynamic power output safety fender guard according to claim 1 is characterized in that being provided with between described storage battery and the ignition lock (26) the indicator lamp L that indicates power take-off shaft work.