CN211671361U - Grass mowing head - Google Patents

Abstract

The utility model provides a grass mowing head, include the fixed line box of output shaft with the motor, unwrapping wire lock button, wire reel and with the fixed line dish cover of line box equipment, the wire reel is acceptd in the line box, it has the rope of mowing to coil on the wire reel, be equipped with the wire hole that supplies the rope of mowing to wear out on the lateral wall of line box, unwrapping wire lock button is restricted the inside reciprocating motion that makes of wire box to with the play of wire reel cooperation control rope of mowing. Compared with the prior art, the utility model discloses a head of beating grass can guarantee that the grass bits can not follow unwrapping wire lock button and get into inside the line box at normal during operation, has prolonged the life of head of beating grass greatly.

Description

Grass mowing head

Technical Field

The utility model relates to a grass cutting head belongs to garden instrument technical field.

Background

A grass trimmer is a garden tool and is used for trimming lawns. At present, the rotary mower mainly adopts a grass mowing rope made of thin nylon as a cutting device, the problem of paying off of the grass mowing rope is often involved when the grass mowing rope is adopted as the cutting device, a general grass mowing rope paying-off mechanism adopts manual paying off, a rope end is pulled outwards once when a paying-off lock button is pressed once, the paying-off mode can be carried out only when the mower stops rotating, the operation is troublesome, and the use is very inconvenient.

Of course, automatic paying-off of the grass mowing rope is realized by adopting an automatic paying-off mechanism in the prior art, but the paying-off lock button of the automatic paying-off grass mowing head is generally exposed outside the grass mowing head shell, grass scraps can easily enter the inside of the grass mowing head, and the throwing-off of the grass mowing rope is hindered.

In view of the above, there is a need to improve the existing grass-mowing head to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a grass-mowing head, this grass-mowing head is under the prerequisite of guaranteeing the function, and the grass bits get into the inside problem of grass-mowing head when not only solving grass-mowing, and the outward appearance is more harmonious moreover, can also lighten weight and cost simultaneously.

In order to achieve the purpose, the utility model provides a grass cutting head, include the fixed line box of output shaft with the motor, unwrapping wire lock button, wire reel and with the fixed line dish cover of line box equipment, the wire reel is acceptd in the line box, it has the rope of beating grass to coil on the wire reel, be equipped with the wire hole that supplies the rope of beating grass to wear out on the lateral wall of line box, unwrapping wire lock button is restricted the inside reciprocating motion that makes of line box to play of rope of beating grass with wire reel cooperation control.

As a further improvement of the utility model, the paying-off lock button is packaged in the wire box.

As a further improvement, the top inner side of the wire box is concavely provided with an accommodating groove, the paying-off lock button is accommodated in the accommodating groove, and the paying-off lock button is limited to move in a reciprocating manner in the accommodating groove.

As a further improvement of the utility model, still include the elastic component, the elastic component is held the inside wall of line box with between the unwrapping wire lock button, just the one end of elastic component is supported and is held on the inside wall of line box, the other end with the unwrapping wire lock button is supported and is held.

As a further improvement of the utility model, be equipped with spacing seat on the inside wall of line box, the elastic component is kept away from the spacing accommodating of one end of unwrapping wire lock button is in the spacing seat.

As a further improvement of the utility model, one end of the paying-off lock button is provided with a mounting groove for spacing containing the elastic piece.

As a further improvement, the top of wire reel is equipped with inboard location ratchet gear and sets up with one heart the outside location ratchet ring gear in inboard location ratchet wheel week outside, the bottom of unwrapping wire lock button is equipped with first lug and second lug, first lug and second lug homoenergetic with the meshing of inboard location ratchet gear and outside location ratchet ring gear mutually.

As a further improvement, the top inboard of line box is equipped with the reference column, the reference column sets up the centre of a circle position department and the downwardly extending of line box, unwrapping wire lock button and wire reel all overlap and are established on the reference column.

As a further improvement of the present invention, the top outside of the wire box is provided with a heat sink, and the heat sink is disposed with the axis of the wire box as a central ring.

As a further improvement, the coil cover with the bottom assembled joint of line box, the coil covers the symmetry and is equipped with two fasteners, it is equipped with two lock grooves to correspond on the line box lateral wall, works as the coil cover with during line box assembled joint, the fastener lock is at the lock inslot that corresponds.

The utility model has the advantages that: the utility model discloses a head of beating grass sets the unwrapping wire lock button to by the restriction at the inside reciprocating motion that makes of line box to play of beating the grass rope with wire reel cooperation control, thereby no matter what kind of state is in at the unwrapping wire lock button, the both ends of unwrapping wire lock button can not all expose in the outside of line box, in other words, do not set up the opening with the corresponding position department of unwrapping wire lock button on the line box, and then the head of beating grass during normal work, can guarantee that the grass bits can not follow inside the unwrapping wire lock button gets into the line box, the life of the head of beating grass has been prolonged greatly.

Drawings

Fig. 1 is a perspective view of the grass mowing head of the utility model.

Fig. 2 is an exploded view of the grass-mowing head shown in fig. 1.

Fig. 3 is another perspective view of the thread cassette of fig. 2.

Fig. 4 is a perspective view of the pay-off lock knob of fig. 2.

Fig. 5 is another perspective view of the pay-out lock button shown in fig. 4.

Fig. 6 is a perspective view of the wire spool of fig. 2.

Fig. 7 is a perspective view of the wire cover of fig. 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 2, the present invention discloses a grass mowing head 100, which comprises a wire box 10 connected and fixed with an output shaft (not shown) of a motor, a wire releasing lock button 20 and a wire spool 30 accommodated in the wire box 10, and a wire spool cover 40 assembled and fixed with the wire box 10. The pay-off lock button 20 is restricted to reciprocate inside the wire box 10, the pay-off lock button 20 does not move outside the wire box 10, specifically, the pay-off lock button 20 and the wire spool 30 are hermetically sealed inside the wire box 10 by the spool cover 40, and both ends of the pay-off lock button 20 are not exposed outside the wire box 10. The grass mowing rope 50 is wound on the wire winding disc 30, a wire outlet hole 101 through which the grass mowing rope 50 penetrates is formed in the side wall of the line box 10, and the free end of the grass mowing rope 50 extends out of the line box 10 through the wire outlet hole 101.

Referring to fig. 2 and 3, the wire box 10 is a cylindrical structure with an open lower end, a shaft hole 11 and a plurality of fins 12 annularly arranged around the shaft hole 11 (which can also be understood as the axis of the wire box 10) are disposed at the top axis of the wire box 10, the shaft hole 11 is disposed through the wire box 10 to allow an output shaft of a motor to pass through, and the fins 12 are disposed on the outer side of the top of the wire box 10 to dissipate heat of the motor located above the wire box 10. In this embodiment, the heat dissipation fins 12 are provided with 8 fins and are uniformly distributed on the circumference with the shaft hole 11 as the center, but the invention should not be limited thereto.

The top inboard of line box 10 is equipped with reference column 13, reference column 13 sets up the centre of a circle position department and the downwardly extending of line box 10, unwrapping wire lock button 20 and wire reel 30 all overlap and are established on reference column 13. An inner cavity 131 is formed in the positioning column 13, and the inner cavity 131 is communicated with the shaft hole 11 so as to allow an output shaft of the motor to pass through.

The inside of the top of the wire box 10 is further concavely provided with an accommodating groove 14 for accommodating the paying-off lock button 20, and the shape of the accommodating groove 14 is matched with that of the paying-off lock button 20, so that the paying-off lock button 20 is limited in the working process. The positioning column 13 is located in the accommodating groove 14.

Referring to fig. 4 in conjunction with fig. 2 and 3, the paying-off lock button 20 is limited to reciprocate in the receiving slot 14 inside the line box 10 to cooperate with the wire spool 30 to control the paying-off of the mowing cord 50. Specifically, the pay-off lock button 20 is pressed on the top of the spool 30 and has a rectangular plate-like structure with a large end and a small end. The pay-off lock button 20 is provided with a jack 21, the jack 21 penetrates through the pay-off lock button 20, so that the pay-off lock button 20 is inserted into the positioning column 13 through the jack 21, the pay-off lock button 20 can be driven to rotate synchronously when the wire box 10 rotates, and the pay-off lock button 20 can be prevented from sliding out of the wire box 10 due to centrifugal motion.

One end of the pay-off lock button 20 is provided with an elastic member 23, the elastic member 23 is clamped between the inner side wall of the wire box 10 and the pay-off lock button 20, one end of the elastic member 23 abuts against the inner side wall of the wire box 10, and the other end abuts against the pay-off lock button 20. In this embodiment, the elastic member 23 is preferably a return spring, a limiting seat 16 is disposed at an end of the inner sidewall of the wire box 10 close to the return spring 23, and an end of the return spring 23 far from the wire releasing lock knob 20 is limited and received in the limiting seat 16. In this embodiment, the large end of the pay-off lock button 20 is provided with an installation groove 24 for accommodating the other end of the return spring 23 in a limiting manner, so that the return spring 23 can be limited between the pay-off lock button 20 and the wire box 10 through the installation groove 24 and the limiting seat 16; of course, in other embodiments, the return spring 23 can be fixedly connected to the pay-off lock button 20 in other manners, such as being integrally formed.

Referring to fig. 5 and 6, the wire spool 30 includes a wire winding portion 31 for winding the grass mowing cord 50, and a first connecting portion 32 and a second connecting portion 33 respectively disposed at two ends of the wire winding portion 31, wherein the wire winding portion 31, the first connecting portion 32 and the second connecting portion 33 are all disposed in a circular shape, and the diameters of the first connecting portion 32 and the second connecting portion 33 are larger than the diameter of the wire winding portion 31, so that the grass mowing cord 50 can be limited between the first connecting portion 32 and the second connecting portion 33.

The top of the first connecting portion 32 is provided with an inner positioning ratchet gear 321 and an outer positioning ratchet ring 322 concentrically arranged on the circumferential outer side of the inner positioning ratchet gear 321, the bottom of the paying-off lock button 20 is provided with a first projection 25 and a second projection 26, the first projection 25 is located at the large end of the paying-off lock button 20, the second projection 26 is located at the small end of the paying-off lock button 20, and both the first projection 25 and the second projection 26 can be meshed with the inner positioning ratchet gear 321 and the outer positioning ratchet ring 322, so that the wire spool 30 is clamped, the wire spool 30 and the wire box 10 rotate together, and the relative rotation of the wire spool 30 and the wire box 10 is avoided.

Referring to fig. 7 in combination with fig. 2, the wire coil cover 40 is detachably assembled and connected to the bottom (i.e., the lower opening) of the wire box 10, two fastening members 41 are symmetrically disposed on the wire coil cover 40, two fastening grooves 17 are correspondingly disposed on the side wall of the wire box 10, and when the wire coil cover 40 is assembled and connected to the wire box 10, the fastening members 41 are fastened in the corresponding fastening grooves 17, so that the wire releasing lock button 20 and the wire coil 30 are hermetically installed in the wire box 10. In other words, the position on the line box 10 corresponding to the pay-off lock button 20 is not provided with an opening, so that grass clippings cannot enter the line box 10 from the pay-off lock button 20 when the grass trimmer head 100 works normally, and the service life of the grass trimmer head 100 is greatly prolonged. In this embodiment, the two fasteners 41 are elastic fasteners to assemble and fix the wire coil cover 40 and the wire box 10 by elastic deformation.

Set up line dish cover 40 to detachable and line box 10 bottom assembled joint to easy to assemble and dismantlement, the installation and the maintenance of the inside each device of line box 10 of being convenient for, and through set up elastic buckling piece 41 on line dish cover 40, and utilize mutually supporting of buckling piece 41 and buckling groove 17, make line dish cover 40 and line box 10 stable connection, line dish cover 40 is difficult for droing from line box 10.

Preferably, the top of the fastening member 41 is provided with a protrusion 411 protruding outwards, the fastening slot 17 is provided at the top of the sidewall of the wire box 10, and when the wire coil cover 40 is assembled with the wire box 10, the protrusion 411 is limited and received in the fastening slot 17.

The utility model discloses the automatic unwrapping wire of head 100 of beating grass is for the motion of wire reel 30 according to unwrapping wire lock button 20 to make first lug 25, second lug 26 mesh the course of operation that realizes unwrapping wire and locking respectively with inboard location ratchet 321 and outside location ratchet ring 322 mutually.

Specifically, the method comprises the following steps: under normal condition, the pay-off lock button 20 is pushed by the return spring 23, the first protrusion 25 is engaged with the inner positioning ratchet gear 321, and the second protrusion 26 is engaged with the outer positioning ratchet gear 322.

When the grass trimmer is started, the grass trimming head 100 is driven by the output shaft of the motor to start rotating, the paying-off locking button 20 and the wire reel 30 synchronously rotate, and due to the action of centrifugal force, the paying-off locking button 20 is thrown out towards one side of the return spring 23 (namely, the paying-off locking button moves towards the return spring 23 along the accommodating groove 14 in a linear mode), so that the return spring 23 is compressed, the first lug 25 moves to be meshed with the outer side positioning ratchet ring gear 322, the second lug 26 moves to be meshed with the inner side positioning ratchet gear 321, at the moment, the paying-off locking button 20 clamps the wire reel 30 again, and the paying-off locking button and the. In this process, the spool 30 is slightly rotated relative to the box 10, and the mowing cord 50 is discharged in a small amount, and the amount of the mowing cord 50 discharged is small and not obvious. When the grass trimmer is in normal operation, the return spring 23 is always in a compressed state.

When the grass cutting head 100 stops gradually, the wire box 10 loses the power of the motor, the centrifugal force of the paying-off lock button 20 weakens and is pushed back under the elastic force of the return spring 23, at the moment, the wire reel 30 continues to rotate under the inertia effect to generate relative displacement with the wire box 10, paying-off is carried out until the paying-off lock button 20 is pushed back to the initial position (namely, the first lug 25 is meshed with the inner side positioning ratchet gear 321 again, the second lug 26 is meshed with the outer side positioning ratchet ring 322 again), and paying-off is stopped. In this process, the spool 30 is rotated relatively more with respect to the line box 10, and the amount of the mowing cord 50 discharged is relatively more, so that the mowing operation is performed next time.

To sum up, the utility model discloses a grass mowing head 100 sets the unwrapping wire lock button 20 to complete sealed accomodating in line box 10 and by the restriction at the inside reciprocating motion that makes of line box 10 to play of rope 50 of mowing with the cooperation control of wire reel 30, thereby no matter what kind of state is in unwrapping wire lock button 20, the both ends of unwrapping wire lock button 20 can not expose in the outside of line box 10, and then grass mowing head 100 during normal work, can guarantee that the grass bits can not follow unwrapping wire lock button 20 and get into inside line box 10, prolonged grass mowing head 100's life greatly. Compared with the prior art, the utility model discloses a grass-mowing head 100 still has the advantage that the outward appearance is more harmonious, weight is lighter, the cost is lower under the prerequisite of guaranteeing the function, is suitable for application and popularization.

The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. The utility model provides a head of beating grass, includes the line box fixed with the output shaft of motor, unwrapping wire lock button, wire reel and with the fixed wire reel cover of line box equipment, the wire reel is acceptd in the line box, it has the rope of beating grass to coil on the wire reel, be equipped with the wire hole that supplies the rope of beating grass to wear out on the line box lateral wall, its characterized in that: the paying-off lock button is limited in the wire box to reciprocate so as to be matched with the wire spool to control the paying-off of the grass cutting rope.

2. Grass-mowing head according to claim 1, characterized in that: the pay-off lock button is enclosed in the cord box.

3. A grass-mowing head according to claim 2, characterized in that: the top inner side of the wire box is concavely provided with an accommodating groove, the paying-off lock button is accommodated in the accommodating groove, and the paying-off lock button is limited in the accommodating groove to do reciprocating motion.

4. A grass-mowing head according to claim 2, characterized in that: the paying-off device is characterized by further comprising an elastic piece, wherein the elastic piece is clamped between the inner side wall of the wire box and the paying-off lock button, one end of the elastic piece abuts against the inner side wall of the wire box, and the other end of the elastic piece abuts against the paying-off lock button.

5. Grass-mowing head according to claim 4, characterized in that: the inside wall of the wire box is provided with a limiting seat, and one end of the elastic piece, which is far away from the paying-off lock button, is limited and contained in the limiting seat.

6. Grass-mowing head according to claim 4, characterized in that: one end of the paying-off lock button is provided with a mounting groove for limiting and accommodating the elastic piece.

7. Grass-mowing head according to claim 1, characterized in that: the top of the wire spool is provided with an inner side positioning ratchet gear and an outer side positioning ratchet ring which is concentrically arranged at the outer side of the circumference of the inner side positioning ratchet gear, the bottom of the wire releasing lock button is provided with a first lug and a second lug, and the first lug and the second lug can be meshed with the inner side positioning ratchet gear and the outer side positioning ratchet ring.

8. Grass-mowing head according to claim 1, characterized in that: the top inboard of line box is equipped with the reference column, the reference column sets up the centre of a circle position department and the downwardly extending of line box, unwrapping wire lock button and wire reel all overlap and establish on the reference column.

9. Grass-mowing head according to claim 1, characterized in that: the top outside of line box is equipped with the fin, just the fin uses the axis of line box sets up as central ring.

10. Grass-mowing head according to claim 1, characterized in that: the wire coil cover is assembled and connected with the bottom of the wire box, two buckling pieces are symmetrically arranged on the wire coil cover, two buckling grooves are correspondingly arranged on the side wall of the wire box, and when the wire coil cover is assembled and connected with the wire box, the buckling pieces are buckled in the corresponding buckling grooves.

Images