CN105830626A - Mower and clutch thereof - Google Patents

Abstract

Provided is a mower. The mower comprises an engine, cutter heads and the clutch. The clutch comprises a motor, a driving unit connected with the motor and an output mechanism connected with the driving unit. The driving unit comprises a cam driven by the motor and a push rod driven by the cam. The outer surface of the cam is in contact with the outer edge of the cam. The cam rotates to drive the push rod to perform linear movement. The pushing stroke for the push rod to contact the near point of the cam and to contact the far point of the cam enables the output mechanism to be switch in the driving state. Power of the engine can be transferred to the cutter heads to mowing operation. The return stroke for the push rod to contact the far point of the cam to contact the near point of the cam enables the output mechanism to switch in the non-driving state. Drive between the engine and the cutter heads is cut off. The clutch of the mower utilizes the motor as a power source and switches between the driving state and the non-driving state. Operation is performed more easily by a user in a labor-saving manner and the mower has more attractive appearance without the handle rod.

Description

Hay mover and clutch thereof

Technical field

The present invention relates to hay mover, particularly relate to the clutch of transfer motion power between the electromotor and cutter head of hay mover.

Background technology

Hay mover is widely used in pruning lawn and repairing, so that lawn keeps smooth.Existing hay mover generally includes Having electromotor, cutter head and clutch, described electromotor, as power source, drives cutter head by the transmission V belt translation of clutch, Described clutch operating makes its transmission band tensioning or lax, and when transmission band tensioning, driven by engine cutter head rotates and mows, The transmission of electromotor and cutter head is disconnected during transmission belt sag.Existing clutch is generally controlled through proficiency lever-operated by user, behaviour On work more arduously, the most attractive in appearance.

Summary of the invention

The present invention provides simple to operate, the labour-saving hay mover of a kind of energy and clutch thereof.

A kind of clutch, the gear unit being connected with described motor including motor and the output machine being connected with described gear unit Structure, described output mechanism is configured to switch between drive state and non-drive state under the driving of described gear unit, institute State gear unit include one by motor-driven cam and by cam-actuated push rod, the outer surface of described push rod and cam Outward flange contact, cam rotation orders about described push rod and moves linearly back and forth, described push rod from the near point of cam to and cam The rise of far point contact make described output mechanism switch to drive state, described push rod from near to cam of the far point of cam The backhaul of point cantact makes described output mechanism switch to non-drive state.

A kind of hay mover, including electromotor, cutter head and clutch, described clutch includes that motor is connected with described motor Gear unit and the output mechanism that is connected with described gear unit, described output mechanism is configured at described gear unit Switching between drive state and non-drive state under driving, described gear unit includes one by motor-driven cam, Yi Jiyi By cam-actuated push rod, the outer surface of described push rod contacts with the outward flange of cam, and cam rotation orders about described push rod back and forth Rectilinear movement, described push rod makes described output mechanism switch to transmission from the near point of cam to the rise contacted with the far point of cam State, the power of described electromotor can be passed to cutter head and carry out cutting operation, described push rod from the far point of cam to and cam Near point contact backhaul make described output mechanism switch to non-drive state, the transmission between described electromotor and cutter head be cut off.

The clutch of hay mover of the present invention, using motor as power source, driving clutch is between drive state and non-drive state Switching, compared with needing manual operations handlebar in conventional art, user operation is simpler laborsaving, and cancels handlebar and can make Hay mover outward appearance is more attractive in appearance.

Accompanying drawing explanation

Below in conjunction with the accompanying drawings, by the detailed description of the invention of the present invention is described in detail.Be appreciated that accompanying drawing only provide with reference to Use is described, is not used for the present invention is any limitation as.In accompanying drawing, the size of display is only to describe for ease of clear, and does not limit Certainty ratio relation.

Fig. 1 is the schematic diagram of the hay mover according to one embodiment of the invention.

Fig. 2 is the kind of drive schematic diagram of hay mover.

Fig. 3 is the schematic diagram of the clutch of hay mover.

Fig. 4 is another angular views of clutch, it is illustrated that middle removal part enclosure is to show internal mechanism.

Fig. 5 is the tooth bar assembling schematic diagram with shaft sleeve unit of clutch.

Fig. 6 is the Fig. 5 sectional view along XI-XI line.

Fig. 7 is the schematic diagram of the original state of clutch.

Fig. 8 is the clutch view when transmission.

Detailed description of the invention

As shown in Figure 1-2, the hay mover 100 of a preferred embodiment of the present invention includes housing 10, the electromotor being located in housing 10 (not shown), cutter head 30 and the clutch 50 of transmission between electromotor and cutter head 30.

Fixing connection one driving pulley 14 in the rotating shaft 12 of described electromotor.Described cutter head 30 can be single or multiple, this reality The hay mover 100 executing example has two cutter heads 30.Each cutter head 30 is fixedly connected in the mandrel 34 of a follow-up pulley 32. Please refer to Fig. 3, described clutch 50 includes gear unit 53 that motor 51 is connected with motor 51, by gear unit 53 Electric switch, pull rope 57, clutch pulley 58 and the transmission band 59 controlled.Described transmission band 59 is installed in driving pulley 14 With on two follow-up pulleies 32, power can be transmitted between electromotor and cutter head 30.

Described motor 51, as the power source of whole clutch 50, is preferably permanent magnet DC motor.At described hay mover 100 Housing 10 on can be provided with button 20 (see Fig. 1), described button 20 is connected with electric switch, and described motor 10 passes through power supply Line is connected with electric switch.Thus the start and stop of motor 51 are controlled by button 20 and electric switch 55.Described gear unit 53 with The rotor of motor 51 is articulated, and exports after slowing down the rotation of motor 51.The two ends of described pull rope 57 respectively with transmission Unit 53 and clutch pulley 58 connect, and gear unit 53 makes pull rope 57 roll or discharge when operating, and drive clutch pulley 58 switch between the first location and the second location.

Specifically, when clutch pulley 58 moves to Fig. 2 primary importance shown in solid, clutch pulley 58 and transmission band 59 Separating, transmission band 59 relaxes, and the power of electromotor will not be delivered to cutter head 30.When clutch pulley 58 moves to Fig. 2 void During the second position shown in line, clutch pulley 58 is supported with transmission band 59, transmission band 59 tensioning, is transmitted by the power of electromotor Make it rotate to cutter head 30, carry out cutting operation.

Please refer to Fig. 4, described gear unit 53 includes gear unit 531, the cam 533 that driven by gear unit 531, Push rod (being a projection in the present embodiment) 534 tooth bars 535 being connected with projection 534, Yi Jiyu with cam 533 effect The rolling wheel 537 that tooth bar 535 is meshed.

Described gear unit 531 is connected with motor 51, can include multiple gear being meshed, the high-speed rotation to motor 51 Slow down.Described gear unit 531 has an output shaft 532, relatively low having one through deceleration rear output shaft 532 Output speed.Described cam 533 is stacked with tooth bar 535, and tooth bar 535 is formed slit 536, described output shaft 532 Top be connected through fixing with cam 533 after the slit 536 of tooth bar 535.As shown in Figures 5 and 6, in the present embodiment, Described tooth bar 535 is provided with pivot 60 at it near one end of cam 533, and described push rod 534 is socketed with pivot 60, outer surface Contact with the outward flange of cam 533.Act on push rod 534 when cam 533 rotates, drive push rod 534 to drive described tooth bar 535 reciprocating linears move.

It is preferred that described push rod 534 is socketed on pivot 60 rotationally, when acting on cam 533, the most described pivot 60 rotate, and form rolling friction, effectively reduce resistance between the two between push rod 534 and cam 535.It is preferred that it is described The top of pivot 60 is formed with draw-in groove, and when described push rod 534 is assemblied on described pivot 60, a clasp 62 is arranged in described card In groove, in the axial direction push rod 534 is carried out spacing.

It is preferred that described push rod 534 includes that internal ring 538 and outer shroud 539, described internal ring 538 are fixed in outer shroud 539, Both can be tight fits or be bonded as one.Wherein, described internal ring 538 is made up of materials such as Teflons, has good light Slippery, when push rod 534 rotates relative to pivot 60, can effectively reduce friction between the two, make rotation more smoothly；Institute State outer shroud 539 to be made up of materials such as rustless steels, there is good rigidity, cam 533 can be born when with cam 533 phase separation Active force and indeformable or damage.In the present embodiment, at the two ends up and down of described push rod 534, i.e. at push rod 534 and clasp Between 62 and between push rod 534 and tooth bar 535, it is respectively equipped with wear plate 64, to reduce mill in push rod 534 rotation process Damage.

In the present embodiment, as shown in Figure 6, described pivot 60 is independent element, is assemblied on described tooth bar 535, correspondingly The pilot hole being formed through on described tooth bar 535.For ease of positioning in the axial direction, the end of described pivot 60 is radially Protrusion is formed with rim 61.Correspondingly, the bottom of described pilot hole is step-like.Described pivot 60 is being passed from bottom to top During the pilot hole of tooth bar 535, the step 61 of the end of pivot 60 supports the step in pilot hole, in the axial direction Primary Location； Pivot 60 top is stretched out outside tooth bar 535 through pilot hole, socket-connects with push rod 534, afterwards by clasp 62 the most at last Pivot 60 and push rod 534 connect and are limited on pivot 60.In other embodiments, described pivot 60 may also be by described tooth Bar 535 integrally stretches out and forms.

Described rolling wheel 537 is meshed with the other end of tooth bar 535, and described pull rope 57 is connected on rolling wheel 537, tooth bar 535 Move back and forth and then drive rolling wheel 537 to rotate clockwise or counterclockwise, making pull rope 57 roll or discharge.In the present embodiment, Described gear unit 531 drives cam 533 with the rotate in an anti-clockwise direction shown in Fig. 7.The contour curve of cam 533 is set It is calculated as push rod 534 and away from the movement (also referred to as rise) in the direction of rolling wheel 537 there is relatively slow speed, and push rod 534 then have comparatively faster speed towards the movement (also referred to as backhaul) in direction near rolling wheel 537, make to guarantee to mow Industry can quickly stop, and improves safety.

Described tooth bar 535 is away from rolling wheel 537, and rotationally clockwise, pull rope 57 is wound on rolling wheel 537 rolling wheel 537, Pull clutch pulley 58 to move to the second position, push against with transmission band 59.Otherwise, cam 533 drives tooth bar 535 near volume When taking turns 537, rolling wheel 537 rotate in an anti-clockwise direction, pull rope 57 outwards discharges, and clutch pulley 58 separates with transmission band 59, Return to primary importance.A spring 56 is had, in order to buffer clutch it is preferred that be connected between pull rope 57 with clutch pulley 58 The active force of pulley 58, it addition, spring 56 is stretched deformation by position when pull rope 57 is wound on rolling wheel 537 by clutch 50, During rolling wheel 537 rotate in an anti-clockwise direction release pull rope 57, the reset force of spring 56 provides pulling force, makes pull rope 57 add rapid release Put.

During original state, as shown in Fig. 2 and Fig. 7, clutch pulley 58 is positioned at primary importance, does not contacts with transmission band 59, passes Dynamic band 59 is in relaxed state, the tooth bar 535 of clutch 50 push rod 534 on rolling wheel 537, tooth bar 535 and cam The near point of 533 contacts, and pull rope 57 outwards discharges the length having maximum, and spring 56 is in the raw.Needs start to cut During grass, pressing the button 20 startup motors 51, slowly run by gear unit 531 band moving cam 533, push rod 534 is with convex The contact point of wheel 533 is moved to far point by near point, and promotion tooth bar 535 is away from rolling wheel 537, and then drives rolling wheel 537 clockwise Rotate, pull rope 57 is gradually wound on rolling wheel 537, as shown in Figure 8.Now pull rope 57 stretch spring 56 drive from Closing pulley 58 to move to the second position, support transmission band 59 and make its tensioning, the power of electromotor 10 can be via transmission band 59 Passing to cutter head 30, band dynamic cutter head 30 is mowed.

Now, motor 51 power-off, clutch 50 is locked in current state, rolling wheel 537 by self-locking mechanism (not shown) Keeping the collapsed state to pull rope 57, transmission band 59 keeps tensioning, makes driven by engine cutter head 30 persistently rotate and mows Operation.When need to stop cutting operation, motor 51 is once again powered up, and as shown by the arrows in Figure 8, cam 533 drives motor 51 Being rotated further under Dong, moved near point by far point with the contact point of push rod 534, tooth bar 535 reversely moves towards rolling wheel 537, Rolling wheel 537 is driven to rotate counterclockwise, outwards release pull rope 57.Clutch pulley 58 is resetted to primary importance by the second position, Separating with transmission band 59, disconnect the power transmission between electromotor 10 and cutter head 30, whole clutch 50 returns to shown in Fig. 7 Original state.

Hay mover 100 of the present invention is using motor 51 as power source, by the cam 533 of clutch 50 and coordinating of tooth bar 535, Realize the haulage gear 55 rotation in both direction clockwise, counterclockwise, drive clutch pulley 57 at primary importance and second Moving back and forth between putting, compared with needing manual operations handlebar in conventional art, user operation is simpler laborsaving, and cancels Handlebar can make hay mover 100 outward appearance more attractive in appearance；It addition, be equiped with push rod 534 and cam on the tooth bar 535 of clutch 50 533 effects, push rod 534 and cam 533 form rolling friction, reduce resistance when cam 533 rotates；Still further, pass through The smooth internal ring 538 of push rod 534 is reduced the frictional force with pivot 60, is born the work of cam 533 by the outer shroud 539 of rigidity Firmly, while forming good transmission, reduce the abrasion of components and parts, the response speed of effective lifting clutch 50 and use Life-span.

It should be noted that the invention is not limited in above-mentioned embodiment, according to the creative spirit of the present invention, art technology Personnel can also make other changes, these changes done according to the creative spirit of the present invention, all should be included in the present invention and be wanted Ask within the scope of protection.

Claims (10)

1. a clutch, the gear unit being connected with described motor including motor and the output mechanism being connected with described gear unit, described output mechanism is configured to switch between drive state and non-drive state under the driving of described gear unit；It is characterized in that, described gear unit include one by motor-driven cam and by cam-actuated push rod, the outer surface of described push rod contacts with the outward flange of cam, cam rotation orders about described push rod and moves linearly back and forth, described push rod makes described output mechanism switch to drive state from the near point of cam to the rise contacted with the far point of cam, and described push rod makes described output mechanism switch to non-drive state from the far point of cam to the backhaul contacted with the near point of cam.

2. clutch as claimed in claim 1, it is characterised in that described push rod includes that internal ring and outer shroud, described internal ring are made up of Teflon, and described outer shroud is made of stainless steel, and is fixedly sheathed on internal ring, and the outer peripheral face of described outer shroud contacts with the outward flange of cam.

3. clutch as claimed in claim 2, it is characterised in that the internal ring of described push rod is socketed on a pivot rotationally, during cam rotation, push rod forms rolling friction with cam.

4. clutch as claimed in claim 3, it is characterised in that the top of described pivot is formed with draw-in groove, and a clasp is spacing to described shaft sleeve unit in being arranged in described draw-in groove.

5. clutch as claimed in claim 3, it is characterized in that, described gear unit also includes tooth bar and rolling wheel, and described pivot is formed at one end of tooth bar, the other end engagement of described volume wheel and rack, described output mechanism is pull rope, being fixedly connected on pipe wheel, the rise of push rod drives rolling wheel to rotate with first direction, is wound on rolling wheel by pull rope, the backhaul of push rod drives rolling wheel to rotate backward with second direction, makes pull rope outwards discharge.

6. clutch as claimed in claim 5, it is characterised in that the pilot hole that described tooth bar is formed through, the bottom of described pilot hole is step-like, and described pivot is arranged in the pilot hole of tooth bar, and the bottom of pivot is formed with rim, and described rim is supported mutually with step.

7. clutch as claimed in claim 1, it is characterized in that, described gear unit also includes gear unit, described gear unit has an output shaft, after the rotating of motor is slowed down via described gear unit, described output shaft has relatively low rotating speed, and described cam is fixedly connected on output shaft and synchronous axial system therewith.

8. clutch as claimed in claim 7, it is characterised in that described tooth bar is stacked with cam, and described output shaft is connected with described cam after described tooth bar, and described tooth bar is formed with long and narrow chute and passes for described output shaft.

9. clutch as claimed in claim 1, it is characterised in that the contour curve of described cam is designed to make the rise of push rod have relatively slow speed, and backhaul has comparatively faster speed.

10. a hay mover, including electromotor, cutter head and the clutch as described in any one in claim 1-9, when the output mechanism of described clutch is drive state, the power of described electromotor can be passed to cutter head and carry out cutting operation, when the output mechanism of described clutch is non-drive state, the transmission between described electromotor and cutter head is cut off.