CN108848998A

CN108848998A - Laborsaving garden shearer

Info

Publication number: CN108848998A
Application number: CN201810713917.4A
Authority: CN
Inventors: 李峥炜
Original assignee: Individual
Current assignee: Fujian Tuoqing Agricultural Development Co Ltd
Priority date: 2018-07-03
Filing date: 2018-07-03
Publication date: 2018-11-23
Anticipated expiration: 2038-07-03
Also published as: CN108848998B

Abstract

The present invention provides a kind of laborsaving garden shearer, the scissors half portion being hinged including two；Each scissors half portion includes cutter head, knife handle；The top of each knife handle is respectively equipped with the axis hole for being parallel to scissors shaft；Be equipped with an axis between two knife handles and be parallel to the torsionspring of scissors shaft, two support arms of the torsionspring be erected at two described in axis hole；Two support arms are made of telescopic rod；In space between two support arms and scissors shaft, it is additionally provided with two swing arms, the front end of each swing arm be hingedly connected to one described in axis hole, make swing arm can be around axis hole rotation, and the rear end of two swing arms is hinged, swing arm articulated joint is formed, a support rod is also connected between the swing arm articulated joint and the torsionspring.The laborsaving garden shearer has apparent elastic-restoring force in the biggish situation of cutter head subtended angle, and in the lesser situation of subtended angle, also only relatively low elastic-restoring force.

Description

Laborsaving garden shearer

Technical field

The present invention relates to garden instrument fields, are to be related to a kind of garden shearer particularly.

Background technique

In afforestation maintenance process, it is often necessary to use garden shearer pollard；Since the knife handle of garden shearer is thicker, So the annular knife handle of common scissors can not be made, knife handle can not be opened by the back of the hand for the hand for holding knife handle, and needed Returning spring is set between two knife handle, it is automatic by returning spring after cutter head knife handle closes up to complete primary shearing Knife handle is strutted outward.

However spring used by current garden shearer mainly has compressed spring and torsionspring, regardless of which kind of spring, Its elastic-restoring force is always inversely proportional with the subtended angle of cutter head, in order to ensure in the biggish situation of cutter head subtended angle, also has apparent Restoring force just necessarily makes in the lesser situation of cutter head subtended angle, has huge restoring force, in this way, in shear history each time In, the second half especially sheared, user requires to overcome very big spring-return power, so that operation process is more painstaking, A large amount of waste physical strength.

Summary of the invention

In view of the above-mentioned problems, the laborsaving garden shearer is in cutter head the purpose of the present invention is to provide a kind of laborsaving garden shearer In the biggish situation in angle, there is apparent elastic-restoring force, and in the lesser situation of subtended angle, also only relatively low bullet Property restoring force.

The technical solution adopted by the present invention to solve the technical problems is：The laborsaving garden shearer includes two and is hinged Scissors half portion；Each scissors half portion includes cutter head, knife handle；The top of each knife handle is respectively equipped with the axis for being parallel to scissors shaft Hole；The torsionspring that an axis is parallel to scissors shaft is equipped between two knife handles, two support arms of the torsionspring are set up In the axis hole described in two；Two support arms are made of telescopic rod；Between two support arms and scissors shaft In space, be additionally provided with two swing arms, the front end of each swing arm be hingedly connected to one described in axis hole, put swing arm can around axis hole Turn, and the rear end of two swing arms is hinged, form swing arm articulated joint, between the swing arm articulated joint and the torsionspring also Connect a support rod.

Preferably, each axis hole and scissors shaft are equidistant, the equal length of two swing arms is described Two support arms it is identical；Make the torsionspring center, swing arm articulated joint center, scissors spindle central three point on a straight line, shape as a result, At scissors line of symmetry, two support arms and two swing arms are symmetrical about the scissors line of symmetry always, to make to protect between support arm, swing arm Uniform stress is held, to improve the service life of entire mechanical system.

Preferably, the support rod by one can the elastic rod of axial deformation constitute, can be pressure by middle section specifically Spring, both ends are the elastic rod of straight-bar；As a result, when knife bar just starts to close up, the elastic rod can be more axial Compression, therefore the support arm slowly extends, and makes the elastic-restoring force of the torsionspring with the very fast growth of closing up of knife bar, and When the later period that knife bar closes up, the elastic rod is compressed axially difficulty, so that the support arm will close up rapid elongation with knife bar, The elastic-restoring force of the torsionspring closes up slow growth with knife bar, when can both make knife bar subtended angle larger as a result, institute When it is larger to state elastic-restoring force, and making knife bar subtended angle smaller, elastic-restoring force is smaller, that is, so that the elastic-restoring force Range further reduces, and the garden shearer is made to remain more stable restoring force.

Preferably, the support rod is the adjustable telescopic bar of an adjustable axial length, e.g., including screw rod and A piece casing being socketed with the screw rod, described sleeve pipe internal diameter is equal with the screw flight outer diameter, and the connecting pin of casing is equipped with One can be around the rotation nipple that casing axis rotates freely, by screwing the rotation nipple, to realize the screw rod The length of described sleeve pipe is protruded into, to adjust the length of the whole support rod；It is practised as a result, when according to personal strength and use It is used, it is when needing to make the integral, flexible restoring force of the garden shearer larger, then the support rod tune is shorter, so that the support arm It is as shorter as possible, and work as and need to make the integral, flexible restoring force of the garden shearer smaller, then it is the support rod tune is longer, with Keep the support arm as long as possible.

The beneficial effects of the present invention are：The laborsaving garden shearer is when shearing branch, as knife handle gradually closes up, two institutes The subtended angle for the swing arm stated gradually becomes smaller, and swing arm and the subtended angle of the support rod are gradually increased, according to the cosine law it is found that two institutes The length for stating support arm is gradually elongated, and knife handle is gradually increased the compression arm of force of the torsionspring as a result, so that torsion bullet Spring is extremely slow for the elastic-restoring force growth rate of knife handle, so that maximum flexibility restoring force is limited in reduced levels, to save Laborsaving operating personnel is a large amount of strength for overcoming elastic-restoring force and consuming.

Detailed description of the invention

Fig. 1 is the schematic diagram of this laborsaving garden shearer embodiment one.

Fig. 2 is the schematic diagram of support rod in this laborsaving garden shearer embodiment two.

Fig. 3 is the schematic diagram of support rod in this laborsaving garden shearer embodiment three.

Specific embodiment

Embodiment one：

In embodiment one shown in Fig. 1, which includes two scissors half portions being hinged；Each scissors half portion packet Include cutter head 11a, 11b, knife handle 12a, 12b；The top of each knife handle 12a, 12b are respectively equipped with the axis for being parallel to scissors shaft 10 Hole 13a, 13b, the i.e. top knife handle 12a are equipped with axis hole 13a, and the top knife handle 12b is equipped with axis hole 13b；Between two knife handles 12a, 12b The torsionspring 14 of scissors shaft 10 is parallel to equipped with an axis, two support arms 14a, 14b of the torsionspring 14 are erected at In axis hole 13a, 13b described in two；Two described support arms 14a, the 14b are made of telescopic rod；Two support arm 14a, In space between 14b and scissors shaft 10, two swing arms 15a, 15b are additionally provided with, the front end of each swing arm 15a, 15b are respectively articulated with The axis hole described in one makes swing arm 15a can be around axis hole 13a rotation, and swing arm 15b can be around axis hole 13b rotation, and two swing arms The rear end of 15a, 15b are hinged, and form swing arm articulated joint 16, between the swing arm articulated joint 16 and the torsionspring 14 also Connect a support rod 17.

In addition, each described axis hole 13a, 13b and scissors shaft 10 are equidistant, described two swing arms 15a, 15b's Equal length, described two support arms 14a, 14b are identical；Make 14 center of torsionspring as a result, in swing arm articulated joint 16 The heart, 10 center three point on a straight line of scissors shaft form scissors line of symmetry, and two support arms 14a, 14b and two swing arms 15a, 15b are always It is symmetrical about the scissors line of symmetry, thus make to keep uniform stress between support arm 14a, 14b, swing arm 15a, 15b, it is whole to improve The service life of a mechanical system.

Above-mentioned laborsaving garden shearer is when shearing branch, as knife handle 12a, 12b gradually close up, swing arm 15a described in two, The subtended angle of 15b gradually becomes smaller, and swing arm 15a, 15b and the subtended angle of the support rod 17 are gradually increased, according to the cosine law it is found that two The length of support arm 14a, 14b described in root are gradually elongated, and knife handle gradually increases the compression arm of force of the torsionspring 14 as a result, Greatly, so that torsionspring 14 is extremely slow for the elastic-restoring force growth rate of knife handle 12a, 12b, thus by maximum flexibility restoring force Reduced levels are limited in, so that saving power operating personnel is a large amount of strength for overcoming elastic-restoring force and consuming.

Embodiment two：

For the embodiment two of this laborsaving garden shearer, with embodiment one the difference is that the support rod.Such as Fig. 2 institute To show, in embodiment two, the support rod 17 is the adjustable telescopic bar of an adjustable axial length, specifically, including a spiral shell Bar 171 and a casing 172 with the screw rod 171 socket, the major diameter of thread phase of 172 internal diameter of described sleeve pipe and the screw rod 171 Deng, casing 172 connecting pin be equipped with one can be around the rotation nipple 173 that casing axis rotates freely, by screwing the rotation Turn nipple 173, to realize that the screw rod 171 protrudes into the length of described sleeve pipe 172, to adjust the whole support rod 17 Length；As a result, according to personal strength and use habit, when needing to make the integral, flexible restoring force of the garden shearer larger, then The support rod 17 is adjusted it is shorter so that described support arm 14a, 14b are as shorter as possible, and when the entirety that need to make the garden shearer Elastic-restoring force is smaller, then the support rod 17 is adjusted it is longer so that described support arm 14a, 14b are as long as possible.

Embodiment three：

For the embodiment three of this laborsaving garden shearer, also it is the support rod 17 with the difference of embodiment one.Such as Fig. 3 It is shown, in the third embodiment, the support rod 17 by one can the elastic rod of axial deformation constitute, specifically, can be by middle section Pressure spring 174, both ends are the elastic rod of straight-bar 175a, 175b；As a result, when knife bar 12a, 12b just start to close up, the bullet Property bar can more easily be compressed axially, therefore described support arm 14a, 14b slowly extend, and return the elasticity of the torsionspring 14 Power is answered with the very fast growth of closing up of knife bar 12a, 12b, and when the later period that knife bar 12a, 12b close up, the elastic rod is axially pressed Contracting is difficult, so that described support arm 14a, 14b will be with the rapid elongation that closes up of knife bar 12a, 12b, the bullets of the torsionspring 14 Property restoring force with knife bar 12a, 12b slow growth of closing up, it is described when can both make knife bar 12a, 12b subtended angle larger as a result, Elastic-restoring force is larger, and when making knife bar 12a, 12b subtended angle smaller, elastic-restoring force is smaller, that is, so that the elastic recovery The range of power further reduces, and the garden shearer is made to remain more stable restoring force.

The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims

1. a kind of laborsaving garden shearer, the scissors half portion being hinged including two；Each scissors half portion includes cutter head（11a,11b）, Knife handle（12a,12b）；Each knife handle（12a,12b）Top be respectively equipped with one and be parallel to scissors shaft（10）Axis hole（13a, 13b）；Two knife handles（12a,12b）Between be equipped with an axis and be parallel to the torsionspring of scissors shaft（14）, the torsionspring （14）Two support arms（14a,14b）Axis hole described in being erected at two（13a,13b）It is interior；It is characterized in that：Described two Support arm（14a,14b）It is made of telescopic rod；Two support arms（14a,14b）With scissors shaft（10）Between space in, It is additionally provided with two swing arms（15a,15b）, the front end of each swing arm be hingedly connected to one described in axis hole, make swing arm（15a,15b） It can be around axis hole（13a,13b）Rotation, and two swing arms（15a,15b）Rear end be hinged, formed swing arm articulated joint（16）, institute State swing arm articulated joint（16）With the torsionspring（14）Between be also connected with a support rod（17）.

2. laborsaving garden shearer according to claim 1, it is characterised in that：Each axis hole（13a,13b）With scissors shaft （10）Be equidistant, two swing arms（15a,15b）Equal length, two support arms（14a,14b）It is identical.

3. laborsaving garden shearer according to claim 1, it is characterised in that：The support rod（17）It can axial deformation by one Elastic rod constitute.

4. laborsaving garden shearer according to claim 3, it is characterised in that：The support rod（17）It is pressure spring by middle section （174）, both ends are straight-bar（175a,175b）Elastic rod.

5. laborsaving garden shearer according to claim 1, it is characterised in that：The support rod（17）It is adjustable axial for one The adjustable telescopic bar of length.

6. laborsaving garden shearer according to claim 5, it is characterised in that：The support rod（17）Including a screw rod （171）With one and the casing of screw rod socket（172）, described sleeve pipe（172）Internal diameter and the screw rod（171）Major diameter of thread It is equal, casing（172）Connecting pin be equipped with one can be around the rotation nipple that casing axis rotates freely（173）, pass through rotation Twist the rotation nipple（173）, to realize the screw rod（171）Protrude into described sleeve pipe（172）Length, to adjust whole institute State support rod（17）Length.