CN214070688U - Assembly head structure of grass trimmer - Google Patents

Abstract

The utility model discloses a grass trimmer assembly head structure, include the housing with the motor shaft hookup, be equipped with the wire reel in the housing, the winding rope of beating grass on the wire reel, the housing front end is equipped with the shroud and locks the wire reel lock in the housing, the free end of beating the rope of beating grass is worn out from the side hole of housing, its characterized in that is equipped with centrifugal force driven clutch between wire reel and the housing, the clutch that starts can lock wire reel and housing, makes wire reel and housing synchronous revolution, the rope is beaten to the pull under the state of no centrifugal force, it only drives the wire reel rotation to beat the rope of grass. The utility model discloses can realize beating the simple and convenient regulation of grass rope, specific theory, as long as the pull beats the grass rope, just can elongate beating the grass rope, if the rope overlength of beating the grass of pulling out can prune and beat the grass rope, adopts the auto-lock that centrifugal force provided, and the clutch starts when the motor drive housing rotates, and the housing locks with the wire reel is relative, beats the grass rope and can not pull out again.

Description

Assembly head structure of grass trimmer

Technical Field

The utility model belongs to garden instrument field relates to the machine of beating the grass, especially relates to a machine of beating the grass assembly head structure.

Background

A grass trimmer is used for cutting all handheld tools for weeds in places such as lawns, gardens, pastures and the like, and comprises a handheld part and an extension rod, wherein the front end of the extension rod is provided with a machine head, and the machine head is provided with a grass trimming rope which can be thrown. The existing grass trimmer head can be provided with a grass trimming rope and also can be provided with a circular saw blade, and the existing grass trimmer head is a structure integrating two functions.

The assembly head of the prior grass trimmer comprises a grass trimmer disclosed in a patent publication No. CN108811851B and a rotating assembly thereof, a grass trimmer disclosed in a patent publication No. CN107302863A and a grass trimmer provided with the grass trimmer. The structure is not provided with a simple and convenient adjusting mechanism of the grass cutting rope, and the front cover cap needs to be detached during adjustment every time.

The grass mowing rope is easy to wear or break when in use, and needs to be adjusted to a proper length simply and conveniently.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a grass trimmer assembly head structure aiming at the prior problem.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a grass trimmer assembly head structure, includes the housing that couples with the motor shaft, be equipped with the wire reel in the housing, the winding rope of beating grass on the wire reel, the housing front end is equipped with the shroud and seals the lock in the housing with the wire reel, the free end of the rope of beating grass is worn out from the side hole of housing, its characterized in that, be equipped with centrifugal force driven clutch between wire reel and the housing, the clutch that starts can lock wire reel and housing, make wire reel and housing synchronous revolution, the pull rope of beating grass under the state of no centrifugal force, the rope of beating grass only drives the wire reel rotatory.

The clutch can pre-lock the wire spool and the housing in a centrifugal force-free state, and the wire spool automatically rotates when the grass rope is pulled and pulled.

The clutch including establish ratchet on the wire reel side, can be along wire reel radial movement's centrifugal locking plate and elastic component, centrifugal locking plate is equipped with the ratchet towards the one side of ratchet, centrifugal locking plate is being pushed up by the elastic component and is making the ratchet go into on the ratchet, centrifugal locking plate restriction and housing synchronous revolution on the housing.

The centrifugal locking plate is characterized in that a central shaft is arranged on the housing, the wire spool is sleeved on the central shaft, an elongated slot is formed in the centrifugal locking plate, the width of the elongated slot is equal to the diameter of the outer ring of the central shaft, a straight edge is formed in the housing, the side edge of the centrifugal locking plate is linear, the side edge of the centrifugal locking plate is attached to the straight edge in a leaning mode, and the elastic piece provides restoring force in the direction parallel to the straight edge.

The wire spool comprises an outer ratchet ring and an inner ratchet ring, a circle of abdicating annular groove is formed between the outer ratchet ring and the inner ratchet ring, the ratchets can retreat into the abdicating annular groove to enable the wire spool to rotate automatically, and the centrifugal locking plate is provided with two ratchets.

The ratchet wheel of the outer ratchet wheel ring and the ratchet wheel of the inner ratchet wheel ring face opposite directions.

The C-shaped groove is formed in the wire spool, one end of the grass mowing rope can be clamped into the C-shaped groove, and a rope knot is arranged at the end portion of the grass mowing rope.

The cover is provided with a clamping groove, the cover is provided with a buckle, and the buckle is pushed into the clamping groove to be detachably connected.

Compared with the prior art, the utility model discloses can realize beating the simple and convenient regulation of grass rope, specific theory, as long as the pull beats the grass rope, just can elongate the rope of beating the grass, if the rope overlength of beating the grass of pulling out can prune the rope of beating the grass, adopts the auto-lock that centrifugal force provided, and the clutch starts when the motor drive housing rotates, and housing and the relative locking of wire reel, the rope of beating the grass can not pull out again.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the cover and the hood of the present invention.

Fig. 3 is a schematic view of the cover and the hood of the present invention.

Fig. 4 is a schematic view of a first state of the centrifugal locking piece.

FIG. 5 is a second state diagram of the locking piece.

Fig. 6 is a schematic view of the mounting of the wire spool.

Fig. 7 is a schematic view of the wire spool winding and the rotation direction.

In the figure, 1 protective cover, 2 cover shells, 3 grass beating ropes, 4 cover shells, 5 clamping grooves, 6 buckles, 7 wire reels, 8 elastic parts, 9 ratchets, 10 centrifugal locking plates, 11 central shafts, 12 long grooves, 13 straight edges, 14 outer ratchet wheel rings, 15 abdicating annular grooves and 16 inner ratchet wheel rings.

Detailed Description

The technical solution in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

The terms "first," "second," and the like in the description of the invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

As shown in fig. 1-3, the present invention includes a housing 2 disposed in front of a protective cover 1, the housing 2 being directly coupled to a motor shaft. Housing 2 is the tube-shape, is equipped with wire reel 7 in the housing 2, and the winding is beaten the grass rope 3 on the wire reel 7, and 2 front ends of housing are equipped with shroud 4 and are blockaded wire reel 7 in housing 2, are equipped with draw-in groove 5 on the housing 2, be equipped with buckle 6 on the shroud 4, buckle 6 realizes dismantling the connection in pushing into draw-in groove 5. The cover 4 restricts the wire spool 7 from axially disengaging from the housing 2.

Be equipped with C word groove on the wire reel 7, beat 3 one end of grass rope and can block into C word groove, should beat 3 tip of grass rope and be equipped with the rope festival. The rope knot is the metal knot, and the rope knot is greater than C word groove size, plays the positioning action, then beats the grass rope 3 and twines on wire reel 7, and the free end of beating the grass rope 3 is worn out from the side hole of housing 2.

A clutch driven by centrifugal force is arranged between the wire spool 7 and the housing 2, and the centrifugal force is provided by a motor.

The clutch includes a ratchet provided on the side of the spool 7, a centrifugal locking plate 10 movable in the radial direction of the spool 7, and an elastic member 8.

The ratchet side of the wire spool 7 comprises an outer ratchet ring 14 and an inner ratchet ring 16, and a ring-yielding annular groove 15 is arranged between the outer ratchet ring 14 and the inner ratchet ring 16. The ratchet wheel orientations of the outer ratchet ring 14 and the inner ratchet ring 16 are opposite. The housing 2 is provided with a central shaft 11, and the wire spool 7 is sleeved on the central shaft 11.

Centrifugal locking plate 10: one side of the ratchet wheel is provided with two ratchets 9, and the centrifugal locking plate 10 is provided with a long groove 12.

The width of the long groove 12 is equal to the diameter of the outer ring of the central shaft 11, the housing 2 is provided with a straight edge 13, the side edge of the centrifugal locking plate 10 is linear, and the side edge of the centrifugal locking plate 10 is attached to the straight edge 13. The straight edge 13 can push the centrifuge blade 10 to rotate, while the straight edge 13 defines the direction of movement of the centrifuge blade 10.

As shown in fig. 4-5 and 6, the centrifugal locking piece 10 is pressed by the elastic member 8 to make the ratchet 9 snap into the ratchet wheel, and the elastic member 8 provides a restoring force in a direction parallel to the straight edge 13. The preferred resilient member 8 is a spring.

When the locking mechanism rotates, the centrifugal locking plate 10 plays a role in locking, specifically, the ratchet teeth 9 on the centrifugal locking plate 10 are tightly clamped into the ratchet wheel under the centrifugal force of whipping and are clamped into two points a and b in fig. 7, and the centrifugal direction is the locking direction of the ratchet wheel. Under the centrifugal force, the centrifugal locking plate 10 synchronously rotates the housing 2 and the wire spool 7 at the same time, at the moment, the centrifugal locking plate 10 cannot move, and the housing 2 and the wire spool 7 are locked together. The grass beating rope 3 can not be elongated when pulled.

When the grass mowing device does not rotate, as shown in the figure 7, the pulling direction of the grass mowing rope 3 is the direction of ratchet unlocking, and through the movement shown in the figure 5, the ratchet 9 can retreat into the abdicating annular groove 15 to enable the wire spool 7 to rotate automatically, so that the grass mowing rope 3 can be pulled out by a proper length. The grass-mowing rope 3 has a pre-locking function, namely, the pre-locking function is realized by the elastic piece 8, so that the grass-mowing rope 3 can be pulled only when a certain pulling force is needed.

The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims (8)

1. The grass trimmer assembly head structure comprises a housing connected with a motor shaft, wherein a wire spool is arranged in the housing, a grass beating rope is wound on the wire spool, a cover cap is arranged at the front end of the housing to seal and lock the wire spool in the housing, and the free end of the grass beating rope penetrates out of a side hole of the housing.

2. The lawnmower mounting head structure according to claim 1, wherein the clutch is capable of pre-locking the spool and the housing in a centrifugal force free state, and pulling the grass cutting cord causes the spool to rotate by itself.

3. The grass trimmer assembly head structure as claimed in claim 2, wherein the clutch comprises a ratchet wheel arranged on the side surface of the wire spool, a centrifugal lock plate capable of moving along the radial direction of the wire spool and an elastic member, wherein one surface of the centrifugal lock plate facing the ratchet wheel is provided with a ratchet, the centrifugal lock plate is pressed against the ratchet wheel by the elastic member and is clamped into the ratchet wheel, and the centrifugal lock plate is limited on the housing to rotate synchronously with the housing.

4. The structure of an assembly head of a grass cutter as claimed in claim 3, wherein the housing has a central shaft, the spool is sleeved on the central shaft, the centrifugal locking plate has an elongated slot, the width of the elongated slot is equal to the diameter of the outer ring of the central shaft, the housing has a straight edge, the side edge of the centrifugal locking plate is linear, the side edge of the centrifugal locking plate is attached to the straight edge, and the elastic member provides a restoring force in the direction parallel to the straight edge.

5. The mower assembly head structure of claim 4, wherein said spool comprises an outer ratchet ring and an inner ratchet ring, a ring of abdicating annular grooves are provided between said outer ratchet ring and said inner ratchet ring, said ratchet can be retracted into the abdicating annular grooves to allow the spool to rotate by itself, and said centrifugal locking plate is provided with two ratchet teeth.

6. The lawnmower mounting head structure according to claim 5, wherein the ratchet wheel orientations of the outer ratchet ring and the inner ratchet ring are opposite.

7. A grass trimmer assembly head structure according to any one of claims 1-5, characterized in that the wire spool is provided with a C-shaped groove, one end of the grass trimming rope can be clamped into the C-shaped groove, and the end part of the grass trimming rope is provided with a rope knot.

8. A grass trimmer assembly head structure according to any one of claims 1-5, characterized in that the housing is provided with a clamping groove, the cover is provided with a buckle, and the buckle is pushed into the clamping groove to realize detachable connection.

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