CN208063803U - A kind of grass trimmer - Google Patents

Abstract

The utility model discloses a kind of grass trimmers, belong to mowing apparatus field, it is intended to provide a kind of belt stretcher that convenience is tensioned transmission belt, its key points of the technical solution are that including hood plate, engine, side plate, connection arm assembly and wheel, there is bottom plate on hood plate, bottom plate is equipped with coaming plate, there is transmission device in coaming plate, transmission device includes driving wheel, driven wheel and endless-belt, driving wheel with transmission shaft is concentric is fixedly connected, driven wheel and the concentric installation of cutter shaft, there is tension pulley support in coaming plate, tensioning wheel and screw rod, tensioning wheel is between driving wheel and driven wheel；There is U-shaped notch in the one end of tensioning holder far from tensioning wheel, and U notches are interior to be connected with latch segment by clamping screw, and guide plate is vertically connected on coaming plate madial wall, has kidney slot on guide plate；Screw rod is threadedly coupled with latch segment.Screw rod, tensioning wheel, U-shaped notch and kidney slot are used, to facilitate adjusting tensioning wheel, to be tensioned to belt, improves working efficiency.

Description

A kind of grass trimmer

Technical field

The utility model is related to mowing apparatus, more particularly to a kind of grass trimmer.

Background technology

Grass trimmer be it is a kind of for cutting the grass on a lawn, the machine tool of vegetation etc., it is by cutterhead, engine, traveling wheel, row Walk mechanism, blade, handrail, control section composition.Traditional grass trimmer is to realize power transmission by V-type driving belt, still V bands, which are elongated, after a period of operation fluffs, and easy tos produce skidding.Therefore setting tensioning wheel is taken in V, by increasing belt wheel Cornerite, to increase V bands and the frictional force between driving wheel and driven wheel so that V bands can run well.

Notification number discloses a kind of tension structure of mowing-drive for the Chinese patent of CN201709146U, including The bonnet body of cutter shaft is installed, and the gear-box being arranged on bonnet body, installation gear-box is provided on the bonnet body Gear block, gear block include the first mounting base being arranged in gear-box side, and are arranged the of the gear-box other side Two mounting bases are both provided with adjustment hole in first mounting base, the second mounting base.

Fixing piece on the tension structure of this mowing-drive passes through adjustment hole, and tooth is realized by adjusting fixing piece Roller box moves in the first mounting base, the second mounting base, to adjust the distance between driving wheel and driven wheel, realizes transmission belt Tensioning, but this strainer be tensioned when need first bolt is backed out, then to gear-box, power output shaft and active Multiple components such as wheel are adjusted, and bolt is screwed on fixed gear-box after regulating, cumbersome.

Utility model content

The purpose of this utility model is to provide a kind of grass trimmer, has the effect of conveniently being tensioned transmission belt.

The above-mentioned technical purpose of the utility model technical scheme is that：

A kind of grass trimmer, including the hood plate of cutter shaft, the engine being arranged above hood plate one end, vertical peace are installed Side plate loaded on hood plate length direction both ends, the connection arm assembly and wheel being arranged on side plate, the cutter shaft are equipped with Blade, the hood plate upper vertical are equipped with the bottom plate passed through for the transmission shaft of engine, and the bottom plate is equipped with coaming plate, described Transmission device is equipped in coaming plate, the transmission device includes driving wheel, driven wheel and the ring being stretched on driving wheel and driven wheel The belt of shape, the driving wheel with transmission shaft is concentric is fixedly connected, the driven wheel and the concentric installation of cutter shaft, the coaming plate It is inside additionally provided with tensioning apparatus, the tensioning apparatus includes the tension pulley support being rotatablely connected with side plate, is mounted on tension pulley support On tensioning wheel and pass perpendicularly through the screw rod of coaming plate, the tensioning wheel is located at belt positioned at driving wheel and driven wheel between Outside；

The one end of the tension pulley support far from tensioning wheel is equipped with U-shaped notch, passes through clamping screw spiral shell in the U-shaped notch Line is connected with latch segment, and guide plate is vertically fixedly connected on the coaming plate madial wall, and the guide plate is located at latch segment and bottom Between plate, the guide plate is equipped with the kidney slot being pierced by for clamping screw, and the long axis direction of kidney slot and screw axis Direction is parallel；

The screw rod is threadedly coupled with latch segment.

By using above-mentioned technical proposal, in grass trimmer in use, driving transmission shaft rotation by generator, transmission is driven Device rotates, and to drive the cutter shaft with the concentric installation of transmission device to rotate together, realizes mowing function.Screw rod is rotated, is made It obtains the latch segment connecting with screw flight to move along the axis direction of screw rod, drives tension pulley support rotation so that tensioning wheel The cornerite for changing driving wheel and driven wheel with belt contacts, to increase the friction between belt and driving wheel and driven wheel Power makes belt keep certain tensile force, so that belt can run well, extends the service life of transmission device, carries High working efficiency；Kidney slot can play guiding role to the adjusting of tensioning wheel.

Further, the junction of the coaming plate and screw rod is equipped with perforation, and bearing block, the screw rod are equipped in the perforation It is equipped with bearing, the bearing is located in bearing block, and pressing plate has been bolted on the coaming plate lateral wall.

By using above-mentioned technical proposal, when screw rod rotates in perforation, is contacted between side plate and easy tos produce abrasion, Bearing can reduce the abrasion of screw rod, extend the service life of screw rod.Pressing plate can make bearing be not easy to fall off from bearing block, carry High working efficiency.

Further, gasket is arranged on the clamping screw, the gasket is between latch segment and guide plate.

By using above-mentioned technical proposal, gasket not only increases latch segment and the contact area for being oriented to plate surface, and Guiding plate surface is set to be not easy to wear, to extend the service life of guide plate, moreover it is possible to play locking effect.

Further, it is equipped with and the integrally formed support plate of guide plate, the branch between the tension pulley support and coaming plate The one end of fagging far from guide plate is fixed on coaming plate, and the support plate is rotatablely connected with screw rod.

By using above-mentioned technical proposal, support plate plays a supporting role to screw rod, and the both ends of screw rod is made to be in same flat On face, so that screw rod rotation is more steady.

Further, the screw rod is equipped with rotary joint close to one end of pressing plate.

By using above-mentioned technical proposal, rotary joint facilitates external other tools to help screw rod rotation.

Further, the bottom plate is equipped with heat emission hole.

By using above-mentioned technical proposal frictional force is generated between driving wheel and the contact surface of belt when driving wheel rotates Carry out drive belt revolution, to drive driven wheel rotation to transmit movement and torque.When driving wheel runs at high speed, belt and active Larger frictional force makes belt be easy ageing failure due to fever between wheel and driven wheel.Heat emission hole can make the heat that friction generates Amount is discharged to from heat emission hole in air, extends the service life of belt.

Further, the coaming plate is equipped with the cover.

By using above-mentioned technical proposal, the cover makes dust or impurity be not easily accessible in coaming plate, is not easy to transmission device It is impacted with tensioning apparatus, extends the service life of transmission device and tensioning apparatus.

Further, the cover is equipped with peep hole.

By using above-mentioned technical proposal, peep hole can not only facilitate the service condition of observation tumbler, and can It adjusts or repairs in time, improve working efficiency, moreover it is possible to play the role of heat dissipation.

In conclusion the utility model has the advantages that：

1. using screw rod, tensioning wheel, U-shaped notch and kidney slot, adjusting tensioning wheel can be facilitated, and open to belt Tightly, to improve work efficiency；

2. using bearing, to reduce screw surface abrasion, the service life of screw rod is extended；

3. using peep hole, to facilitate the working condition of observation transmission device, adjust in time, moreover it is possible to play scattered The effect of heat.

Description of the drawings

Fig. 1 is that the connection relation in the present embodiment for embodying between hood plate, engine, side plate, connection arm assembly is shown It is intended to；

Fig. 2 is in the present embodiment for embodying the connection relationship diagram between cutter shaft, cutter shaft piece；

Fig. 3 is in the present embodiment for embodying the connection relationship diagram between transmission device, tensioning apparatus；

Fig. 4 is in the present embodiment for embodying the signal of the connection relation between gasket, clamping screw, latch segment, guide plate Figure.

In figure, 1, hood plate；11, side plate；12, bottom plate；121, coaming plate；1211, bearing block；1212, bearing；1213, it presses Plate；1214, it perforates；122, heat emission hole；13, engine；131, transmission shaft；14, the cover；141, peep hole；15, cutter shaft；151, Cutter shaft piece；16, connection arm assembly；17, wheel；2, transmission device；21, driving wheel；22, driven wheel；23, belt；3, tensioning dress It sets；31, tension pulley support；311, U-shaped notch；312, clamping screw；3121, gasket；313, latch segment；32, tensioning wheel；33, Screw rod；331, rotary joint；34, guide plate；341, kidney slot；342, support plate.

Specific implementation mode

The utility model is described in further detail below in conjunction with attached drawing.

Wherein identical parts are presented with like reference characters.It should be noted that word used in the following description Language "front", "rear", "left", "right", "up" and "down" refer to the direction in attached drawing, word " bottom surface " and " top surface ", "inner" and "outside" refers respectively to the direction towards or away from geometric center of specific component.

A kind of grass trimmer, as shown in Figure 1, including being equipped with cutter shaft 15（Referring to Fig. 2）Hood plate 1, be arranged in hood plate 1 Engine 13 above one end, be arranged the both ends of hood plate 1 vertically arranged side plate 11, the connection that is arranged on hood plate 1 Arm component 16 and wheel 17, and cutter shaft 15 is equipped with blade 151（Referring to Fig. 2）.

As shown in figure 3,1 top of hood plate is equipped with the bottom plate 12 passed through for the transmission shaft 131 of engine 13, bottom plate 12 and side Plate 11 is arranged in parallel.Bottom plate 12 is vertically fixedly connected with coaming plate 121 on the side far from engine 13, be equipped with and pass in coaming plate 121 Dynamic device 2.

As shown in figure 3, transmission device 2 includes and the concentric driving wheel 21 being fixedly connected of transmission shaft 131 and cutter shaft 15 1 Hold the concentric driven wheel 22 being fixedly connected and belt 23.

As shown in figure 3, being additionally provided with tensioning apparatus 3 in coaming plate 121, tensioning apparatus 3 includes being rotatablely connected with side plate 11 Bearing up pulley holder 31, the tensioning wheel 32 being rotatablely connected with tension pulley support 31 and the screw rod 33 for passing perpendicularly through coaming plate 121.Tensioning wheel 32 It is arranged between driving wheel 21 and driven wheel 22, and positioned at the outside of belt 23.Tensioning wheel 32 is arranged in tension pulley support 31 Middle part.31 upper end of tension pulley support is equipped with U-shaped notch 311, and U-shaped notch 311 is interior to be threaded with locking by clamping screw 312 Block 313（Referring to Fig. 4）, and screw rod 33 is threadedly coupled with latch segment 313.The diameter of the nut of clamping screw 312 is more than U-shaped notch 311 width.

As shown in Figure 3 and Figure 4, guide plate 34 is equipped between tension pulley support 31 and bottom plate 12, one end of guide plate 34 is logical It crosses support plate 342 to be fixedly connected with coaming plate 121, guide plate 34 is equipped with the kidney slot 341 being pierced by for clamping screw 312, and waist The long axis direction in shape hole 341 is parallel with 33 axis direction of screw rod.Support plate 342 be located at tension pulley support 31 and coaming plate 121 it Between, and be integrally formed with guide plate 34.Screw rod 33 is pierced by latch segment 313 close to one end of tensioning wheel 32 and is put with support plate 342 It is dynamic.Rotate screw rod 33 so that the rotation in coaming plate 121 of screw rod 33 so that the latch segment 313 being threadedly coupled with screw rod 33 is along screw rod 33 axis directions move, drive tension pulley support 31 rotate so that tensioning wheel 32 contact with belt 23 change driving wheel 21 and from The cornerite of driving wheel 22 makes belt 23 keep one to increase the frictional force between belt 23 and driving wheel 21 and driven wheel 22 Fixed tensile force, so that belt 23 can run well.In the moving process of tensioning wheel 32, clamping screw 312 exists simultaneously It is slid in kidney slot 341 and U-shaped notch 311.Support plate 342 can play a supporting role to screw rod 33 so that the two of screw rod 33 Hold it is in the same plane, make screw rod 33 rotation it is more steady.Kidney slot 341 plays guiding role to the movement of latch segment 313.

As shown in figure 4, gasket 3121 is arranged on clamping screw 312, and gasket 3121 is located at latch segment 313 and guide plate Between 34.Gasket 3121 not only increases the contact area of latch segment 313 and 34 surface of guide plate, and makes 34 surface of guide plate It is not easy to wear, to extend the service life of guide plate 34.

As shown in figure 4, the junction of coaming plate 121 and screw rod 33 is equipped with perforation 1214, bearing block is equipped in perforation 1214 1211, bearing block 1211 is interior to be equipped with bearing 1212, and screw rod 33 is pierced by from 1212 middle part of bearing.Pass through on 121 lateral wall of coaming plate It has been bolted pressing plate 1213.Bearing 1212 can reduce abrasion when screw rod 33 rotates, and extend the service life of screw rod 33.Pressure Plate 1213 can make bearing 1212 be not easy to fall off from bearing block 1211, improve work efficiency.

As shown in figure 4, screw rod 33 is equipped with rotary joint 331 close to one end of pressing plate 1213.Rotary joint 331 facilitates external Other tools help screw rod 33 to rotate.

As shown in figure 3, in 23 transmission process of belt a large amount of heat can be generated because of frictional force, heat dissipation is equipped on bottom plate 12 Hole 122, heat can be discharged to from heat emission hole 122 in air, extend the service life of belt 23.

As shown in Figure 1, coaming plate 121 is equipped with the cover 14, and the cover 14 is equipped with peep hole 141.The cover 14 reduces dust It enters in coaming plate 121, is not easy to transmission device 2（Referring to Fig. 3）With tensioning apparatus 3（Referring to Fig. 3）It impacts.Peep hole 141 facilitate the working condition of observation 121 inner driver 2 of coaming plate, convenient to adjust and repair in time, moreover it is possible to play heat dissipation Effect.

Specific implementation process：Grass trimmer is in use, start engine 13 so that and transmission shaft 131 drives driving wheel 21 to rotate, Driven wheel 22 is driven to rotate by the frictional force between belt 23 and driving wheel 21, to drive and 22 concentric installation of driven wheel Cutter shaft 15 rotate, realize mowing function.

Before tensioning apparatus 3 is adjusted, the external others auxiliary tool on the rotary joint 331 of screw rod 33.When adjusting, rotation Screw rod 33 so that the latch segment 313 being threadedly coupled with screw rod 33 is moved along the axis direction of screw rod 33, to drive tensioning wheel Holder 31 rotates so that tensioning wheel 32 contacts the cornerite for changing driving wheel 21 and driven wheel 22 with belt 23, to increase skin With the frictional force between 23 and driving wheel 21 and driven wheel 22, belt 23 is made to keep certain tensile force, so that belt 23 It can run well.When tension pulley support 31 rotates, clamping screw 312 slides in kidney slot 341 and U-shaped notch 311 simultaneously.

This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability Field technique personnel can as needed make the present embodiment the modification of not creative contribution after reading this specification, but As long as all being protected by Patent Law in the right of the utility model.

Claims (8)

1. a kind of grass trimmer, including the hood plate (1) of cutter shaft (15) is installed, is arranged and starts above hood plate (1) one end Machine (13), the side plate (11) for being installed vertically on hood plate (1) length direction both ends, the connection arm assembly being arranged on side plate (11) (16) and wheel (17), the cutter shaft (15) are equipped with blade (151), and hood plate (1) upper vertical is equipped with for starting The bottom plate (12) that the transmission shaft (131) of machine (13) passes through, the bottom plate (12) are equipped with coaming plate (121), and the coaming plate (121) is interior Equipped with transmission device (2), the transmission device (2) include driving wheel (21), driven wheel (22) and be stretched in driving wheel (21) and The belt (23) of annular on driven wheel (22), the driving wheel (21) with transmission shaft (131) is concentric is fixedly connected, it is described from Driving wheel (22) and cutter shaft (15) concentric installation, it is characterized in that：It is additionally provided with tensioning apparatus (3) in the coaming plate (121), described Tight device (3) includes the tension pulley support (31) being rotatablely connected with side plate (11), the tensioning on tension pulley support (31) Wheel (32) and the screw rod (33) for passing perpendicularly through coaming plate (121), the tensioning wheel (32) are located at driving wheel (21) and driven wheel (22) Between, and positioned at the outside of belt (23)；

The one end of the tension pulley support (31) far from tensioning wheel (32) is equipped with U-shaped notch (311), and the U-shaped notch (311) is interior It is threaded with latch segment (313) by clamping screw (312), is vertically fixedly connected with and leads on coaming plate (121) madial wall To plate (34), the guide plate (34) is located between latch segment (313) and bottom plate (12), and the guide plate (34) is equipped with for lock The kidney slot (341) that tight bolt (312) is pierced by, and the long axis direction of kidney slot (341) is parallel with screw rod (33) axis direction；

The screw rod (33) is threadedly coupled with latch segment (313).

2. a kind of grass trimmer according to claim 1, it is characterized in that：The coaming plate (121) is equipped with same with screw rod (33) The perforation (1214) in axle center, for the perforation (1214) far from tensioning wheel (32), the perforation (1214) is interior to be equipped with bearing block (1211), the screw rod (33) is equipped with bearing (1212), and the bearing (1212) is located in bearing block (1211), the coaming plate (121) pressing plate (1213) has been bolted in the side far from tensioning wheel (32).

3. a kind of grass trimmer according to claim 2, it is characterized in that：It is arranged with gasket on the clamping screw (312) (3121), the gasket (3121) is located between latch segment (313) and guide plate (34).

4. a kind of grass trimmer according to claim 3, it is characterized in that：The tension pulley support (31) and coaming plate (121) it Between be equipped with guide plate (34) integrally formed support plate (342), the one end of the support plate (342) far from guide plate (34) is solid It is scheduled on coaming plate (121), the support plate (342) is rotatablely connected with screw rod (33).

5. a kind of grass trimmer according to claim 4, it is characterized in that：The screw rod (33) is close to one end of pressing plate (1213) Equipped with rotary joint (331).

6. a kind of grass trimmer according to claim 3, it is characterized in that：The bottom plate (12) is equipped with heat emission hole (122).

7. a kind of grass trimmer according to claim 6, it is characterized in that：The coaming plate (121) is equipped with the cover (14).

8. a kind of grass trimmer according to claim 7, it is characterized in that：The cover (14) is equipped with peep hole (141).