CN106416628A - Mowing machine - Google Patents

Abstract

The invention discloses a mowing machine, belonging to the field of garden machinery. The mowing machine comprises a fixed support and a motor arranged on the fixed support, and also comprises a transmission support; an output shaft is arranged on the transmission support; the motor drives the output shaft to rotate; relative to the circumference of the fixed support, the transmission support rotates under the driving by the output shaft; a friction sleeve is fixedly arranged on the fixed support; a brake block used for tightly locking the friction sleeve is arranged on the transmission support; the friction sleeve is made of a resin material; and the brake block is an integrated brake sheet made of a metal material. The mowing machine provided by the invention solves the problems of complicated assembling and high cost of a conventional mowing machine. The mowing machine provided by the invention is used for weeding.

Description

A kind of hay mover

【Technical field】

The present invention relates to a kind of hay mover, belong to graden machine field.

【Background technology】

Hay mover of the prior art, including motor, Motor drive output shaft rotation, when output shaft rotation, drives Mowing blade rotates, and to realize weeding, for safety standard requirements, hay mover, when quitting work, will be taken to mowing blade A kind of braking, such as Authorization Notice No. brake structure for lawn mower that has been the disclosure of the invention of CN 202276655, including pedestal, on pedestal Fix a motor and rotate connection one output shaft, output shaft is provided between a belt pulley and motor and passes through belt transmission, belt It is provided with a belt wheel liner, belt wheel liner and output shaft are fixed, and are provided with locking between belt pulley and belt wheel liner between wheel and output shaft Structure, this latch-up structure enables to carry movable belt pulley liner to rotate during pulley rotation, is provided with spring between belt pulley and belt wheel liner, It is additionally provided with friction structure, after belt pulley runs out of steam, spring release elastic force makes belt wheel liner relatively between belt pulley and belt wheel liner Belt pulley reversion is thus friction structure produces rubbing action.

Wherein friction structure includes being located at the brake pad of lining in belt wheel, and pedestal is provided with friction sleeve, during braking, brake pad Hold tightly with friction sleeve, wherein brake pad is Split type structure, including friction block body and the friction plate being located on brake pad, this side Case there is also certain drawback, and in actual production manufacture process, friction plate needs, on the manually installed block body to friction, in addition to rub When wiping set is fixed to pedestal, relatively complicated, so on the whole, assembly technology is relatively complicated, not only material cost is high, people Work cost is also high, and the market competitiveness is not high.

【Content of the invention】

Problem to be solved by this invention is exactly to provide a kind of hay mover, solves existing hay mover assembling complexity, cost Higher problem.

For solving above-mentioned technical problem, the present invention adopts the following technical scheme that：

A kind of hay mover, including fixed support, the motor on fixed support, also includes transmission bracket, described transmission Support is provided with output shaft, described Motor drive output shaft rotation, and output shaft drives transmission bracket with respect to described fixed support Circumferentially rotate, described fixed support is fixed with friction sleeve, described transmission bracket is provided with for holding described friction sleeve tightly Brake shoes, described friction sleeve is made up of resin material, the integral type brake block that described brake shoes is made for metal material.

Using beneficial effects of the present invention：

For friction sleeve：Original friction sleeve is typically metalwork, and this kind of friction sleeve is directly socketed on fixed support, profit With securing members such as screws, friction sleeve is fixed, to prevent friction sleeve from rotating it is clear that this installation side with respect to fixed support Formula, relatively complicated, and also add extra securing member cost, material and cost of labor are of a relatively high, rubbing in the present invention The material wiping set adopts resin material, resin material in moulding process, plastic become complex shape, structure, can be square Just with fixed support positioning and installation, and resin material cost itself is relatively low, therefore for friction sleeve itself, decreases material Cost and cost of labor.

For brake shoes：The integral type brake block that brake shoes in the present embodiment is made for metal material, with respect to split For the brake shoes of formula structure, eliminate the processing step that two parts of split are mounted together, and typically split type Brake block, generally include friction block body and the friction plate that is located on brake pad, friction block body generally adopts the materials such as aluminum Die casting forms, of a relatively high in material cost, and utilizes integral type brake block, not only eliminates and for friction plate to be installed to friction Processing step on block body, and material itself then can adopt lower-cost ferrous material, therefore from brake shoes itself Speech, equally decreases material cost and cost of labor.

Combined effect for friction sleeve and brake shoes：One of them adopts resin material, and another is metal material, During holding, the frictional force producing between resin material and metal material is larger, and braking effect is obvious, no matter and being material itself Cost or manual assembly cost, this combination of the present invention, cost is all very low, with respect to original hay mover, is reducing Still preferable braking effect is can guarantee that while cost.

Preferably, described friction sleeve is connected on described fixed support.Use resinous wood just because of friction sleeve Material, plastic become complex shape, structure, by realize friction sleeve by clamping in the way of be connected with fixed support, installation More convenient.

Preferably, described fixed support is provided with bulge loop, described bulge loop, circumferentially arranged with several gap slots, described rubs Wipe set inner circumferential side and be provided with the boss mating with gap slot.Gap slot can prevent friction sleeve relative with bulge loop generation with the cooperation of boss Rotate, structure is simple, good positioning effect.

Preferably, described bulge loop is provided with grab at described gap slot, described boss is provided with and the cooperation of described grab Card convex, described grab hook lock is in card convex.Grab and card convex enables friction sleeve and the above-below direction of bulge loop is spacing, cooperation lacks The rotary spacing of mouth groove and boss is so that be located by connecting completely between friction sleeve and fixed support.

Preferably, described brake shoes is connected with the drive component for driving brake block grip friction set, described driving Assembly is included big belt wheel and is used for the projection being offseted with brake shoes in big belt wheel, and big belt wheel is by motor-driven rotation, described Big belt wheel be provided with for described transmission bracket circumference activity circumferentially rotate space, described circumferentially rotating is provided with spring in space. Using the program, transmission bracket is driven to carry out circumference with respect to big belt wheel in space and turn circumferentially rotating using the elastic force of spring Dynamic, thus allowing the projection in big belt wheel prop up brake shoes, allow brake shoes hold friction sleeve tightly, by the use of spring as driving source, structure Simply, low cost.

Preferably, described brake shoes is located at the outer circumferential side of described friction sleeve, brake shoes wherein one end is hinged on transmission On frame, described brake shoes is used for being adjacent to described friction sleeve towards the medial wall of friction sleeve, and described brake shoes is outer away from friction sleeve Side wall is provided with the spigot surface for offseting with described projection.Brake shoes one end is hinged, and the other end is movable, leads when projection props up During to face, that one end of brake shoes activity near friction sleeve, until be adjacent on friction sleeve, this mode of braking, structure is simple, There is no the part of complexity, low cost.

Preferably, described big belt wheel is provided with the first location division in one end of corresponding spring, described transmission bracket is to should The other end of spring is provided with the second location division, and described spring is positioned between the first location division and the second location division.First positioning Positioning action is played to the two ends of spring in portion and the second location division, prevents spring to be subjected to displacement, and allows elastic force evenly, braking effect More stable.

Preferably, forming spring receiving space between described first location division and described projection, described spring retention exists In this spring receiving space, described projection is provided with the catch pushing down described brake shoes.In the program, make use of projection well This feature, in this scenario, projection has not only acted as the effect of conflict brake shoes, and can also accommodate empty as separating spring Between a separation, and catch is set on projection, the above-below direction of brake shoes can be played with position-limiting action, reduce brake The rocking of block, stability is more preferable.

Preferably, described first location division and/or the second location division are cross column, the inner ring of spring can be socketed in cross On post, the structure of the cross column good positioning effect to spring, and also structure is simple.

Preferably, described big belt wheel is provided with spring bearer plate and locating button, described spring bearer plate one end is stuck in locating button Interior, the other end is fixed in big belt wheel by securing member.Because spring is during by compression, the mid portion of spring is easy Generation is arched upward phenomenon, therefore arranges spring bearer plate in big belt wheel, and is provided with locating button for spring bearer plate in this programme, by calmly Position button to realize the positioning to spring bearer plate and fixation with appended claims, and easy for installation, parts are few.

These advantages of the present invention and other advantages will be detailed in following specific embodiment, accompanying drawing exposure.

【Brief description】

The present invention is described further below in conjunction with the accompanying drawings：

Fig. 1 is the structural representation of hay mover first embodiment of the present invention；

Fig. 2 is the exploded perspective view of hay mover first embodiment internal structure of the present invention；

Fig. 3 is friction sleeve and support bracket fastened connection diagram in hay mover first embodiment of the present invention；

Fig. 4 is friction sleeve and support bracket fastened exploded perspective view in hay mover first embodiment of the present invention；

Fig. 5 is that in hay mover first embodiment of the present invention, brake shoes does not hold schematic diagram during friction sleeve tightly；

Fig. 6 is the schematic diagram that in hay mover first embodiment of the present invention, brake shoes holds during friction sleeve tightly；

Fig. 7 is the connection diagram of big belt wheel and transmission bracket in hay mover first embodiment of the present invention.

【Specific embodiment】

Accompanying drawing with reference to the embodiment of the present invention is explained and illustrated to the technical scheme of the embodiment of the present invention, but under State embodiment and be only the preferred embodiments of the present invention, and not all.Based on the embodiment in embodiment, those skilled in the art On the premise of not making creative work, obtained other embodiment, broadly falls into protection scope of the present invention.

Embodiment 1

The present embodiment is a kind of hay mover, is a kind of gardens apparatus, for weeding, its basic work structuring and principle, It is to be rotated using motor, drives output shaft rotation, output shaft is connected with blade, during blade rotation, weeds is cut off, to realize The purpose of weeding, because blade is more sharp, for the requirement of safety standard, when hay mover does not work, blade preferably at On-position, with incised wound people or object during anti-rotation, therefore existing hay mover generally comes with brake gear, main in the present embodiment The brake gear of hay mover is specifically launched.

Referring in particular to Fig. 1 to Fig. 2, in the internal structure of the present embodiment hay mover, including fixed support 2, fixed support 2 is solid Dingan County is provided with small pulley 11 equipped with motor 1, the direct outfan of motor 1, and small pulley 11 is connected with greatly by transmission belt 12 Belt wheel 3, big belt wheel 3 is connected with transmission bracket 4, and transmission bracket 4 is provided with output shaft 5, and output shaft 5 is fixedly mounted at biography On dynamic support 4, during work, motor 1 rotates, and drives big belt wheel 3 to rotate by transmission belt 12, drives when big belt wheel 3 rotates Transmission bracket 4 rotates, and when transmission bracket 4 rotates, drives output shaft 5 to rotate, and final band cutting blade 6 rotates.

Brake gear in the present embodiment, including the friction sleeve 21 being arranged on fixed support 2 and be arranged on transmission Brake shoes 41 on frame 4, brake shoes 41 holds friction sleeve 21 tightly realizing braking action so that transmission bracket 4 cannot with solid Fixed rack 2 relatively rotates.Hay mover, in normal work, does not contact between brake shoes 41 and friction sleeve 21.

Friction sleeve 21 in the present embodiment is in substantially circular, is made up of resin material, and described brake shoes 41 is located at friction The outer circumferential side of set 21, and the integral type brake block that the brake shoes 41 in the present embodiment is made for metal material, gold referred herein Belong to material it is not limited to single metal material or alloy material, or powder metallurgy, excellent in the present embodiment Elect ferrous material as, and integral type brake block, it is primarily directed to for original split type brake shoes, for example CN A kind of brake structure for lawn mower disclosed in 202276655 patents, its brake shoes is substantially made up of two parts, assembles follow-up During need to connect both, either bonding is still installed with securing members such as screws, and its assembly technology is all cumbersome, and Integral type brake block in the present embodiment, refers to that metal material is made of one piece, the later stage eliminates packaging technology.

For friction sleeve：Original friction sleeve is typically metalwork, and this kind of friction sleeve is directly socketed on fixed support, profit With securing members such as screws, friction sleeve is fixed, to prevent friction sleeve from rotating it is clear that this installation side with respect to fixed support Formula, relatively complicated, and also add the securing member cost such as extra screw, material and cost of labor are of a relatively high, this enforcement Friction sleeve 21 in example adopts resin material, resin material in moulding process, plastic become complex shape, structure, Can facilitate and position with fixed support 2 and install, and resin material cost itself is relatively low, therefore for friction sleeve itself, reduce Material cost and cost of labor.

Because friction sleeve 21 adopts resin material, brake shoes 41 is metal material, when holding tightly, resin material and metal material The frictional force producing between material is larger, braking effect substantially, no matter and be material cost itself or manual assembly cost, This combination of embodiment, cost is all very low, with respect to original hay mover, still can guarantee that relatively while reducing cost Good braking effect.

Friction sleeve 21 in the present embodiment utilizes the characteristic of molding resin material, carries out optimization design on shape and structure, Friction sleeve 21 is connected with fixed support 2 by way of clamping.

Specific described fixed support 2 is provided with bulge loop 22 as shown in Figure 3 and Figure 4, and the lateral wall edge of described bulge loop 22 is all To the gap slot 221 being provided with several indents, described friction sleeve 21 is enclosed within outside bulge loop 22, described friction sleeve 21 inner circumferential side be provided with The boss 211 of described gap slot 221 coupling, boss 211 spacing in gap slot 221, can prevent friction sleeve 21 and bulge loop 22 it Between relatively rotate, in the present embodiment the quantity of gap slot 221 be six, the quantity also phase of the boss 211 on friction sleeve 21 Should be six.In the present embodiment, the projecting height of boss 211 is less than the hollow depth of gap slot 221.

Spacing up and down to friction sleeve 21 in order to increase bulge loop 22, described bulge loop 22 footpath at described gap slot 221 is yearned for It is extended with outward grab 222, the upper surface of grab 222 is provided with the inclined-plane of guiding, and the medial wall of described boss 211 is extended with card Convex 212, during installation, card convex 212 and inclined-plane offset, when continuing to push described grab 222 hook lock in card convex 212 so that friction Set 21 is locked on bulge loop 22 it is impossible to depart from, and in the present embodiment, in six gap slots 221, has selected wherein three gap slots 221, and Grab 222 is set in these three gap slots 221.

Fixed support 2 described in the present embodiment is provided with outer shroud 23, described outer shroud 23 and bulge loop in the periphery of described bulge loop 22 It is connected with many dowels 24, when friction sleeve 21 is installed, the bottom of friction sleeve 21 is offseted with dowel 24, whole between 22 side wall Individual friction sleeve 21 is stuck between dowel 24 and grab 222.

As shown in Figures 5 to 7, brake shoes 41 quantity in the present embodiment has three pieces, and three pieces of brake shoes 41 are located at friction sleeve 21 outer circumferential side, taking one of brake shoes 41 as a example, the generally curved bar of brake shoes 41 in the present embodiment, wherein brake shoes 41 one end is hinged on the upper surface of transmission bracket 4, and the other end is then free end, specific articulated structure：In transmission bracket 4 It is provided with threaded post 42, the wherein height of threaded post 42 is more than the thickness of brake shoes 41, and brake shoes 41 is provided with hinge hole, hinge hole It is enclosed within threaded post 42, and use screw-driving, because the height of threaded post 42 is more than the thickness of brake shoes 41, during screw fastening, Will not will be locked for brake shoes 41, brake shoes 41 still can be freely rotatable.

In the present embodiment, brake shoes 41 holds friction sleeve 21 tightly, relies primarily on drive component and completes to drive, drive component exists Above-mentioned big belt wheel 3 and transmission bracket 4 is included, although transmission bracket 4 is arranged on big belt wheel 3 in the present embodiment in the present embodiment Interior, but can relatively rotate between the two, and also the space rotating is limited, as shown in Figure 6, that is, described Big belt wheel 3 is provided with and circumferentially rotates space R, by circumferentially rotating space R, transmission for described transmission bracket 4 circumference activity Frame 4 can be relatively rotated with big belt wheel 3, and the space circumferentially rotating space R in the present embodiment is limited, specifically, can Understand in conjunction with Fig. 2 and Fig. 6, transmission bracket 4 outer circumferential side is provided with spacing preiection 45, the two ends of spacing preiection 45 are respectively the first limit Position end 401 and the second positive stop end 402, spacing preiection 45 is contained in and circumferentially rotates in the R of space, using first spacing 401 and second Positive stop end 402 and the two ends circumferentially rotating space R offset to realize circumference spacing.

In the present embodiment, the mobilizable rotational angle of the maximum between transmission bracket 4 and big belt wheel 3 is α, wherein 15 °≤α ≤60°.

Described circumferentially rotating is provided with spring 43 in space, as shown in Figure 5 and Figure 6, when transmission bracket 4 is rotated in a first direction When, spring 43 is compressed, and when the elastic force of spring 43 discharges, spring 43 promotes transmission bracket 4 to be rotated in a second direction, in this reality Applying spring 43 in example is the energy-storage travelling wave tube interim as.

For more preferable retaining spring 43, described big belt wheel 3 is provided with the first location division 31, institute in one end of corresponding spring 43 State transmission bracket 4 to the other end of spring 43 the second location division 44 should be provided with, described spring 43 is positioned at the first location division 31 With second between location division 44.Described first location division 31 and the second location division 44 are preferably cross column, and the inner ring of spring 43 can To be enclosed within cross column, the structural strength of cross column is good, and the inner ring of spring 43 can be crossed win cooperation and be sleeved on cross column, surely Qualitative good it is not easy to depart from.

Drive component also includes being located at the projection 32 on 3 weeks edges of big belt wheel, and this projection 32 is mainly used in offseting with brake shoes 41, Projection 32 is located at the outside of brake shoes 41, offsets for the lateral wall with brake shoes 41, and the medial wall of brake shoes 41 is used for and rubs Wipe set 21 to offset, lateral wall referred herein refers on brake shoes 41, away from the side wall of friction sleeve 21 side, medial wall is brake Block 41 is towards the side wall of friction sleeve 21 side.Wherein in the present embodiment, in order to make brake shoes 41 more suitable in the presence of projection 32 Profit ground is offseted with friction sleeve 21, and the lateral wall of described brake shoes 41 is provided with the spigot surface 411 for offseting with described projection 32, this Spigot surface 411 in embodiment is preferably inclined-plane.

In big belt wheel 3 in the present embodiment, circumference is interval with three projections 32, is formed described between two neighboring projection 32 Circumferentially rotate space R, projection 32 is provided with the first confined planes 3201 and the second confined planes 3202, the first confined planes 3201 be used for First positive stop end 401 offsets, and the second confined planes 3202 are used for offseting with the second positive stop end 402.

The braking operation principle of whole hay mover is as follows：

First, motor 1 rotate drive big belt wheel 3 accordingly rotate, but blade 6 reality mow during, weeds are to knife The resistance of piece 6 and blade 6 deadweight of itself, produce certain load to output shaft 5, and this load makes the rotation meeting of output shaft 5 Lag behind described belt wheel to rotate, that this hysteresis quality is brought as a result, relatively rotating between big belt wheel 3 and transmission bracket 4, Relatively rotate circumferentially rotating in the R of space, transmission bracket 4 now is rotated in a first direction, i.e. second in transmission bracket 4 Location division 44 rotates towards first location division 31 corresponding on fixed support 2, and spring 43 now starts to be compressed, until transmission First positive stop end 401 of support 4 upper limit projection 45 is offseted with the first confined planes 3201 of described projection 32.After offseting, transmission Support 4 is rotated together with big belt wheel 3, and spring 43 now fills and can complete.

Spring 43 fills the state diagram that can complete referring to Fig. 5, and now the lateral wall of brake shoes 41 is not contacted with projection 32, and Brake shoes 41 is got rid of under the action of the centrifugal to outermost, and projection 32 is reserved with escape groove 321, in the present embodiment for brake shoes 41 The side wall of escape groove 321 forms described second confined planes 3202, when brake shoes 41 is got rid of to outermost, is placed in this escape groove In 321, now the medial wall of brake shoes 41 and friction sleeve 21 are not adjacent to.

When quitting work when mowing, motor 1 stops operating, and big belt wheel 3 also accordingly stops operating simultaneously, now spring 43 Start to discharge elastic force, now spring 43 promotes transmission bracket 4 to rotate toward second direction, that is, the second location division 44 is away from the first positioning Portion 31, brake shoes 41 now is also rotated in a second direction, the spigot surface 411 in rotation process, on brake shoes 41 lateral wall Offset with the projection side of inner side in described projection 32, in the present embodiment, the projection side of inner side is the first confined planes actually 3201 and second confined planes 3202 intersection edges.By the guide effect on inclined-plane, the free end of brake shoes 41 is slowly towards friction sleeve 21 Rotate, until the medial wall of brake shoes 41 is adjacent to the lateral wall of friction sleeve 21, produces between brake shoes 41 and friction sleeve 21 and rub Wiping power, realizes braking effect, and the state diagram of brake shoes 41 holding completely can be found in Fig. 6.

In addition, as can be known from Fig. 7, spring receiving space L, institute are formed between described first location division 31 and described projection 32 State spring 43 to be contained in this spring receiving space L, the top of described projection 32 is provided with the catch pushing down described brake shoes 41 322, the catch 322 in the present embodiment simply locally pushes down brake shoes 41, and brake shoes 41, in holding and release process, is lived all the time Move in the space that catch 322, escape groove 321 are formed, will not depart from from this space, the free end due to brake shoes 41 is Activity, in holding and release process, can produce and teetertotter, and after catch 322 is set, can be effectively upper to brake shoes 41 Lower orientation is positioned, and reduces the upper and lower displacement amount of brake shoes 41, and stability is more preferable.

For synthesis, in the present embodiment, projection 32 actually carries multiple effects, on the one hand, transmission bracket 4 is on edge First direction rotates, and projection 32 plays the effect offseting with spacing preiection 45；On the other hand, transmission bracket 4 is in a second direction During rotation, projection 32 plays the effect offseting with brake shoes 41；Also have and a catch 322 can be arranged on projection 322, to play Reduce the problem that brake shoes 41 teetertotters.Originally need multiple structures just can complete effect, entire set is on a structure In feature, be equivalent to and complete three effects with the feature of a projection 32, simpler in structure, it is not take up the end face of big belt wheel 3 Position, reduces the volume of big belt wheel 3, it should be noted that the concrete shape of projection 32 is not limited to this in the present embodiment Plant shape.

Due to spring 43 in compression process it may occur that the phenomenon that arches upward, once arching upward, the elastic force of spring 43 can become Changing, thus causing elastic force uneven, causing braking effect unstable, thus in the present embodiment big belt wheel 3 be provided with upper in spring 43 Side is provided with spring bearer plate 46, and spring bearer plate 46 has three pieces, curved strip, concrete mounting structure：Described big belt wheel 3 is provided with fixed Position button 33, the lower button 332 that positioning includes the upper button 331 taking the shape of the letter U and is located at upper button 331 lower section, upper button 331 and lower button 332 formation One socket, described spring bearer plate 46 one end is inserted in this socket, and the other end fastens in big belt wheel 3 by screw, wherein Screwed hole 323 is located at the top of described projection 32.

The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and is familiar with This those skilled in the art should be understood that the present invention includes but is not limited to accompanying drawing and interior described in specific embodiment above Hold.The modification of any function and structure principle without departing from the present invention is intended to be included in the scope of claims.

Claims (10)

1. a kind of hay mover, including fixed support, the motor on fixed support, also includes transmission bracket, described transmission is propped up Frame is provided with output shaft, output shaft rotation described in described Motor drive, and output shaft drives described transmission bracket solid with respect to described Fixed rack circumferentially rotates, and described fixed support is fixed with friction sleeve, and described transmission bracket is provided with for rubbing described in holding tightly Wipe set brake shoes it is characterised in that described friction sleeve is made up of resin material, described brake shoes make for metal material one Body formula brake block.

2. hay mover as claimed in claim 1 is it is characterised in that described friction sleeve is connected on described fixed support.

3., it is characterised in that described fixed support is provided with bulge loop, described bulge loop is along week for hay mover as claimed in claim 2 To being provided with several gap slots, described friction sleeve inner circumferential side is provided with the boss mating with gap slot.

4. hay mover as claimed in claim 3 is it is characterised in that described bulge loop is provided with grab at described gap slot, described Boss is provided with the card convex with the cooperation of described grab, and described grab hook lock is in card convex.

5. hay mover as claimed in claim 1 it is characterised in that described brake shoes be connected with for driving brake block clamping rub Wipe the drive component of set, described drive component is included big belt wheel and is used for the projection being offseted with brake shoes in big belt wheel, greatly Belt wheel by motor-driven rotation, described big belt wheel be provided with for described transmission bracket circumference activity circumferentially rotate space, described Circumferentially rotate and in space, be provided with spring.

6. hay mover as claimed in claim 5 is it is characterised in that described brake shoes, located at the outer circumferential side of described friction sleeve, is stopped Car block wherein one end is hinged in transmission bracket, and described brake shoes is used for being adjacent to described friction sleeve towards the medial wall of friction sleeve, Described brake shoes is provided with the spigot surface for offseting with described projection away from the lateral wall of friction sleeve.

7. hay mover as claimed in claim 6 is it is characterised in that described big belt wheel is provided with first calmly in one end of correspondence spring Position portion, described transmission bracket to the other end of spring the second location division should be provided with, described spring be positioned at the first location division and Between second location division.

8. hay mover as claimed in claim 7 is it is characterised in that form spring between described first location division and described projection Receiving space, in this spring receiving space, described projection is provided with the catch pushing down described brake shoes to described spring retention.

9. hay mover as claimed in claim 7 is it is characterised in that described first location division and/or the second location division are cross Post.

10. hay mover as claimed in claim 5 is it is characterised in that described big belt wheel is provided with spring bearer plate and locating button, institute State spring bearer plate one end to be stuck in locating button, the other end is fixed in big belt wheel by securing member.