CN102475012A

CN102475012A - Protection cover for brush cutter and bearing unit employed therein

Info

Publication number: CN102475012A
Application number: CN2011101622408A
Authority: CN
Inventors: 林炳俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-11-24
Filing date: 2011-06-16
Publication date: 2012-05-30
Anticipated expiration: 2031-06-16
Also published as: JP2013545467A; WO2012070736A1; CN102475012B; KR101021965B1; JP5457610B2

Abstract

The present invention pertains to a protection cover for a brush cutter, which is mounted to protect a blade mounted on a driving shaft of a working die of a brush cutter. The protection cover for a brush cutter comprises: a protection plate having protrusion portions, which have diameters relatively larger than the rotation diameter of a blade and are formed along a circumferential direction to be spaced apart from each other, and mounted at the lower portion of the blade; and a bearing unit including a shaft supporting member having a supporting section and a binding ring. The supporting section is formed at the upper portion of an insertion section by enlarging the outer diameter of the insertion section, which is fitted into a hollow portion of a bearing and has a shaft penetration hole to be penetrated by the driving shaft of the blade of the brush cutter, so that the supporting section comes in contact with the bottom surface of the blade of the brush cutter. The binding ring is mounted to the outer surface of the lower portion of the insertion section and supports the inner wheel of the bearing so as to bind the bearing in the insertion section. Therefore, the coupling force with respect to the brush cutter may be increased.

Description

Mower is with over cap and be applied to this bearing unit

Technical field

The present invention relates to a kind of mower with over cap and be applied to this bearing unit, the external diameter difference in size that relates more specifically to a kind of blade driving shaft according to mower contains that mower that over cap flows is with over cap and be applied to this bearing unit.

Background technology

Mower is installed blade in the rotating shaft lower end of table top; Owing to, during unintentionally near crowds such as children, have accident hazard to use to outside exposed state; In the operation process; Under the situation of the object on blade touching ground, because the speed of blade rotation, the situation that ground object ejects happens occasionally.

And during operation, there are blade and the situation that is clashed and cause bending or fracture by object, because this impact possibly cause the user to miss the generation of second accidents such as table top.

To this, as register No. the 214892nd, practical new case etc., publicity a plurality of states with the protection blade cut in the blade bottom guard plate being installed and then being prevented the mower of accident of weeds smoothly.

Even if but use said mower; As time goes on, owing to table top decline or concentrated force in the operation way are low, baffle pierces ground etc. when making the guard plate kiss the earth; The weeds cutting work that is difficult to be well on brings operating efficiency to hang down inferior shortcoming thus.

For the achievement in research publicity that addresses this is that in the practical new case 20-0439951 of registration.

But mower is used in the protection of the blade in the past of said publicity, and it receives the revolving force that under the drive motors of rotation blade, rotates for the blade baffle of protecting blade, is connecting the damaged danger of fulcrum existence.

And at home in patent application 10-2009-0041732 number, publicity mower with the rotating disc support means that can support the specified angle rotation of the baffle of protection blade use over cap.

On the one hand; Mower in the past can't be contained flowing of over cap according to the external diameter of driving shaft, under the relatively little situation of the external diameter of driving shaft with under its external diameter condition of different by the blade driving shaft of the mower of various manufacturers manufacturing of over cap; Cause with key element that driving shaft combines between insulating space become big; In the process of cutting weeds,, can't guarantee the stable holding power of driving shaft for the upper and lower power that applies through blade; And then cause bent propeller shat or increase it flowing, make the hold-down nut of fixed drive axle relax easily.

Summary of the invention

The present invention creates in order to solve said existing problems, the external diameter difference that the purpose of this invention is to provide a kind of blade driving shaft for various mowers can reduce to greatest extent and driving shaft between insulating space and the mower that can support driving shaft with over cap and be applicable to this bearing unit

In order to realize said purpose; The mower that the present invention relates to is used over cap; It possesses baffle, for the blade of the driving shaft of protecting the table top that is installed on mower, in conjunction with said driving shaft; Be located at the bottom of said blade, the protuberance that has relatively greater than the rotating diameter of said blade forms and protects said blade each other isolator along circumferencial direction; Interior wheel has hollow hollow bulb; Bearing, have concentric angle be bonded to said in the foreign steamer in the wheel outside, can rotate relatively to said interior wheel; The insertion section is inserted into the hollow bulb of said bearing, forms an axle through hole for the driving shaft that makes the mower blade connects; Support sector, the external diameter that forms on the top of said insertion section is greater than the external diameter of insertion section, and is close to the bottom surface of mower blade; And the axle holding components, the lateral surface in the bottom of said insertion section makes it introduce according to center position; Mounting groove through forming along periphery is installed; The interior wheel that inserts the said bearing in the outside, said insertion section provides the elasticity support to the top, has the retaining ring that said bearing is bundled to said insertion section, above support sector, is connected to the medial surface of the axle through hole of insertion section; It is characterized in that comprising bearing unit; It comprises first slot part, separates with the blade central portion of said mower and faces downwards forms, and it is introduced downwards; Second slot part is extended to the below and is had first internal diameter by first slot part; The 3rd slot part is extended to the below and is had second internal diameter less than first internal diameter by second slot part; The 4th slot part is extended to the below and is had the 3rd internal diameter less than second internal diameter by the 3rd slot part; Spring members is bonded between said baffle and the said table top, makes to apply fexible bias pressure to said baffle; Mobile support sector has a kind of protection tube, and it extends to and can center on said spring members, makes said baffle when the restoring force current downflow of said spring members, prevent bending.

Preferably should also possess the first foreign matter breaking member; Top at the said baffle of the bottom that is installed on said mower blade; Position exceeding said axle holding components is bonded to said baffle, makes to center on along the foreign steamer of circumferencial direction with said bearing; First rim part, the said first foreign matter breaking member, through attaching parts be removable at said baffle above; Cylindrical portion, outstanding to the top by said first rim part, inner peripheral surface is in reverse to the foreign steamer of said bearing, and the height of formation is lower than said bearing; And foreign matter blocking-up sill, the edge of the said support sector of said axle holding components extends to the below, and a feasible part that gets into the medial surface of said cylindrical portion prevents that with this foreign matter from flowing into said bearing.

And above the ceiling of the 4th slot part of said insertion section; Be formed in addition said mower blade driving shaft screw thread and in order to improve the hold-down nut that screw thread combines and the adhesion of said insertion section; Projection is strengthened in outstanding downwards isolator each other a plurality of combinations; Said retaining ring is to form annular, and it has the annular section and the inclination supporting pieces of cross section, and its direction to each external diameter expansion on the cross section of said annular section is outstanding; It forms for said annular section with being inclined upwardly, has the inclination supporting pieces that elasticity is supported is carried out to the top in the interior wheel bottom of said bearing.

Preferably also should possess the second foreign matter breaking member, can load and unload the bottom surface that is incorporated into said baffle, and support the foreign steamer of said bearing, form with the shape around the bottom of said bearing, the blocking-up foreign matter flows in the said bearing.

Can also possess, the asessory shaft holding components is installed on second slot part of said insertion section; Can install when making the reduced diameter of said driving shaft; Releasably be formed at said insertion section, make to extend to said the 3rd slot part, form through hole less than said second internal diameter size.

According to mower provided by the invention with over cap and be applicable to this bearing unit; External diameter difference for the blade driving shaft of mower; Can reduce to greatest extent and driving shaft between isolation; Have the structure that to support driving shaft, have the advantage that can improve with the mower concatenation ability.

Description of drawings

Fig. 1 is the stereogram of expression mower according to the present invention with over cap;

Fig. 2 carries out the separation stereogram of part separation with over cap to the mower of Fig. 1 for expression;

Fig. 3 is that the mower of presentation graphs 1 is used the over cap profile;

Fig. 4 is the profile that inserts the state of asessory shaft holding components in the insertion section of presentation graphs 3.

The explanation of Reference numeral

110: baffle 140: bearing unit

141: bearing 150: the axle holding components

Embodiment

The mower that below will relate to the preferred embodiments of the present invention with reference to accompanying drawing is with over cap and be applicable to that this bearing unit is elaborated.

Fig. 1 is the stereogram of expression mower according to the present invention with over cap; Fig. 2 carries out the separation stereogram of part separation with over cap to the mower of Fig. 1 for expression; Fig. 3 is that the mower of presentation graphs 1 is used the over cap profile.

Referring to figs. 1 through Fig. 3, mower has the structure that is made up of baffle 110, bearing unit 140, the support sector 170 of flowing with over cap 100.

At first, be suitable for the mower of mower, can rotating tee cross the blade 20 that the driving shaft outstanding in the lower ends downward side of table top 30 41 installed with over cap 100.

This mower utilizes the mode of electro-motor rotating driveshaft, and the power that produces in the engine by fuel driven is conveyed to the mode of driving shaft 41 etc. through the power transmission key element through table top 30, have various structures, to this detailed.

State bearing unit 140 after baffle 110 obtains and the support of the support sector 170 of flowing, be arranged at the bottom of blade 20 of the cross section of the table top 30 that is installed in mower.

Baffle 110 forms the base part 111 of through hole 112 by middle body and is made up of with radial outstanding isolator each other protuberance 113 base part 111.

The diameter of base part 111 is less than the diameter of blade 20, and the length of protuberance 113 is longer than blade relatively.This baffle 110 makes and the preferential contact protection plate 152 of the relative blade 20 of barriers such as sand on ground plays the effect of protection blade that lead-ingroove 117 zones between the protuberance 113 provide the zone according to blade cutting weeds.

Base part 111 by with the through hole 114 that is formed at central authorities be the center fit tightly in after state the top adherence part 111a above the foreign steamer 141b of bearing 141; Adherence part 111a is according to the sloping portion 111b that is directed downwards the oblique one-tenth of square neck of its external diameter expansion from top; First and second foreign matter breaking member 161 of after horizontal direction prolongs and provides, stating from the cross section of sloping portion; The horizontal component 111c of 171 calmodulin binding domain CaM; Horizontal component partly waits formation from having the bone formation that prolongs according to horizontal direction downwards after cross section is introduced.

Reference marks 113a be with after the mobile support sector 170 that states combine, crooked and use protuberance to the top with the combination that the external diameter greater than other protuberances 113 forms.

Bearing unit 140 is incorporated between blade 20 and the baffle 110, can support driving shaft 41 rotations.

Bearing unit 140 possesses bearing 141, axle holding components 150.

Bearing 141 by the interior 141a of wheel that possesses hollow hollow bulb 142, for the interior 141a of wheel in order to realize relatively rotation angle with one heart be bonded to said in foreign steamer 141b outside the wheel 141a constitute.

It is the bearing of various forms such as interconnective ball bearing of the ball (not shown) of transmission body that this bearing 141 can be suitable for according to the interior 141a of wheel and foreign steamer 141b.

Axle can insert driving shaft 41 in the holding components 150 and be inserted into the hollow bulb 142 of bearing 141, forms with " T " font, and making in the top and the bottom of baffle 110 can supportive protection plate 110, specifically is made up of insertion section 152, support sector 156 and retaining ring 181.

Insertion section 152 is parts of inserting the hollow bulb 142 of bearing 141, is longer than the thickness of bearing 141 relatively, forms axle through hole 153 and makes the driving shaft 41 of mower blade 20 connect.The detailed structure of axle through hole 153 will be described hereinafter.

Support sector 156 is integrally formed with

insertion section

152, and 152 top prolongs and forms with the length horizontal direction greater than insertion section 152 external diameters in the insertion section, and it is the part that fits tightly in the bottom surface of mower blade 20.

The edge of support sector 156 is formed with foreign matter blocking-up sill 158, and the part medial surface of the cylindrical portion 161b of the first foreign matter breaking member 161 that it is stated after extending to downwards prevents that with this foreign matter from flowing into bearing 141.

Retaining ring 181 is through introducing and the mounting groove 154 that forms along periphery towards center position for the lateral surface of 152 the bottom in the insertion section, flexibly supports to be inserted into the interior 141a of wheel of the bearing 141 in 152 outsides, insertion section to the top, and is fixed to insertion section 152.

Retaining ring 181 forms with ring-type; It has cross-sectional cut " O " font annular section 181a and two inclination supporting pieces 181b; Its direction to each external diameter expansion on the cross section of said annular section 181a is outstanding; It forms for said annular section 181a with being inclined upwardly, has the elasticity support is carried out to the top in the interior 141a of the wheel bottom of said bearing 141.

This retaining ring 181 is in assembling process; When combining for the mounting groove 154 of the bearing 141 that is installed on baffle 110 bottoms through the insertion section 152 of axle holding components 150; Inclination supporting pieces 181b the interior 141a of the wheel bottom of bearing 141 interfere downwards and to above the interior 141a of the wheel bottom of radial journal bearing 141 flexibly, the adhesion in strengthening between wheel 141a and the insertion section 152.

On the one hand; About the axle through hole structure of the axle holding components 150 that inserts driving shaft 41, above support sector 156, be connected to the medial surface of the axle through hole of insertion section 152, it comprises the first slot part 155a; Separate formation with blade 20 central portions of said mower, it is introduced downwards; The second slot part 155b is extended to the below and is had first internal diameter by the first slot part 155a; The 3rd slot part 155c is extended to the below and is had second internal diameter less than first internal diameter by the second slot part 155b; The 4th slot part 155d is extended to the below and is had the 3rd internal diameter less than second internal diameter by the 3rd slot part.

The first slot part 155a here is under the through hole that the central authorities of blade 20 form with the size that is sufficiently more than driving shaft 41, considers not allow the part that forms with the part of the support of blade 20; The second slot part 155b is for the installation sill of the asessory shaft holding components of stating after can loading and unloading (Fig. 4 is with reference to 251) are provided; The 3rd slot part 155c be guarantee in the driving shaft 41 of mower of circulation on the market, to have the driving shaft 41 of maximum outside diameter can be through the part that forms; The 4th slot part 155d is for the combination space of the hold-down nut 45 that combines with the screw thread of driving shaft 41 is provided.

According to the structure of this insertion section 152, need to install under external diameter and the very big situation of the difference of the internal diameter of the 3rd slot part 155c of mower driving shaft 41 of baffle 110, as shown in Figure 4, insert 251 uses of asessory shaft holding components and get final product.

Asessory shaft holding components 251 begins to prolong less than the mode of head OD gradually interimly from the head greater than the 3rd slot part 155c external diameter; The feasible second slot part 155b that is installed on insertion section 152; Guarantee to insert, adopt to possess less than second internal diameter of third part and the getting final product of through hole that can guarantee the internal diameter that driving shaft 41 connects through the 3rd slot part 155c.

And be formed with above the ceiling of the 4th slot part 155d of insertion section 152 for improve with driving shaft 41 on the screw thread that forms carry out the adhesion of the insertion section 152 of the hold-down nut 45 that screw thread combines, a plurality of combinations reinforcement projections 157 of projection downwards isolator each other.

The first foreign matter breaking member 161 is bonded to above the baffle 110 under the state of baffle 110 assemblings; Make in order to prevent that foreign matter from passing through to flow into and get into bearing 141 between baffle 110 and blade 20 and the axle holding components 150, center on the foreign steamer 141b of bearing 141 from the top of baffle 110 according to circumferencial direction.

The first foreign matter breaking member 161 by the first rim part 161a that on the horizontal component 111c of baffle 110, releasably combines through attaching parts 163 with by the first rim part 161a to above give prominence to; Inner peripheral surface is in reverse to the foreign steamer 141b of bearing 141, and the cylindrical portion 161b that the height of formation is lower than bearing 141 constitutes.

The second foreign matter breaking member 171 is releasably to combine through attaching parts 163 at the horizontal component 111c of baffle 110; Prevent that foreign matter from flowing into the foreign steamer 141b of bearing 141 and radial journal bearing 141 from the bottom of baffle 110, also center on the bottom of bearing 141 with the foreign steamer 141b of radial journal bearing 141.

After the second foreign matter breaking member 171 prolongs downwards by the second rim section 171a of the horizontal component 111c bottom surface that is bonded to baffle 110 and from rim section 171a; To the middle body warpage, the cross section of formation through hole 173 and the cup shell part 171b that interior wheel 141 forms isolator constitute for the foreign steamer 141b of radial journal bearing.

On the one hand, in order to ensure the accessory cover 185 among Fig. 3 of the bearing that thoroughly covers the baffle bottom 141 and axle holding components 150 and closed lower part, it can combine through the bottom surface of baffle 110.

Flow support sector 170 by the partial rotation that allows baffle 110 when blade 20 rotations, and be formed with in order to ensure stoping the rotation more than the certain angle combination of baffle 110 with the groove of protuberance 113a, be bonded between the fixed support 175 of table top 30 and guarantee to baffle 110 apply fexible bias pressure spring members 171, extend to and can and make baffle 110 prevent crooked protection tube 173 formations when the restoring force current downflow of spring members 171 around spring members 171.

The protection tube 173 here not only can be protected spring members 171; Can guarantee simultaneously to keep between baffle 110 and the blade 20 certain interval; After making that baffle 110 rotates to an angle, under the restoring force of spring members 171, return in the process of initial position, when excessive gravitation takes place spring members 171; Prevent that spring members 171 from lifting with the side direction top that is connected baffle 110, prevent the metaboly that a side of baffle 110 upwarps.

Said over cap 110 is as shown in Figure 3; Under assembled state; The interior 141a of wheel of blade 20, driving shaft 41, axle holding components 150, attaching nut 45, bearing 141 fixes with fitting tightly each other; The rotation of linkage driving axle 41 and being rotated, the foreign steamer 141b of bearing 141, baffle 110 and first, second foreign matter breaking member 161,171 then are fixed in the foreign steamer of bearing 141b.

Claims

1. a mower is used over cap, it is characterized in that, comprising:

Baffle; It combines with said driving shaft in order to protect the blade of the driving shaft that is installed on the mower table top, so that be positioned at the bottom of said blade; Relatively the protuberance greater than the rotating diameter of said blade forms and protects said blade each other isolator along circumferencial direction

Bearing unit, it comprises: bearing, its have hollow hollow bulb interior wheel and concentric angle be bonded to said in the foreign steamer in the wheel outside so that can rotate relatively to said interior wheel; The axle holding components; It comprises the hollow bulb that is inserted into said bearing and is formed with a through hole; Make the insertion section that the driving shaft of mower blade connects, the top that is formed on said insertion section, its external diameter is greater than the external diameter of insertion section, and the support sector of being close to the bottom surface of mower blade, through introducing the mount grooves that ground forms along periphery towards center position; Be installed in the lateral surface of the bottom of said insertion section; And the interior wheel of the said bearing that is inserted into the outside, said insertion section carried out the elasticity support to the top, and said bearing is bundled to the retaining ring of said insertion section

Spring members, it is combined between said baffle and the said table top, so that apply fexible bias pressure to said baffle,

The support sector of flowing, it has a kind of protection tube tool, and this protection tube can prolong around said spring members ground, and the phenomenon of bending when preventing that said baffle from flowing according to the restoring force of said spring members;

The medial surface that above said support sector, is connected to the axle through hole of said insertion section comprises:

First slot part, it forms downwards with introducing, so that separate formation with the blade central portion of said mower, it is introduced downwards;

Second slot part, it extends to the below and has first internal diameter from first slot part;

The 3rd slot part, it extends to the below and has second internal diameter less than first internal diameter from second slot part;

The 4th slot part, it extends to the below and has the 3rd internal diameter less than second internal diameter from the 3rd slot part.

2. mower according to claim 1 is used over cap; It is characterized in that; Top at the said baffle of the bottom that is installed on said mower blade also is provided with the first foreign matter breaking member; It is bonded to said baffle in the position that exceeds said axle holding components, so that the foreign steamer along circumferencial direction around said bearing;

The said first foreign matter breaking member comprises:

First rim part, its through attaching parts releasably be incorporated into said baffle above;

Cylindrical portion, it is outstanding to the top from said first rim part, and inner circumferential surface is in reverse to the foreign steamer of said bearing, and it highly is lower than the height of said bearing; And

Foreign matter blocking-up sill, the edge of the said support sector of said axle holding components extends to the below, makes the part of medial surface of said cylindrical portion get into, and flow into said bearing to prevent foreign matter.

3. mower according to claim 2 is used over cap; It is characterized in that; On the ceiling surface of the 4th slot part of said insertion section, also be formed with a plurality of combinations and strengthen projections; It carries out the adhesion between the said insertion section of the hold-down nut that screw combines in order to improve with the screw thread of the driving shaft that is formed on said mower blade, and is outstanding downwards isolator each other;

Said retaining ring forms annular; It has the annular section and the inclination supporting pieces of cross section; This inclination supporting pieces direction to each external diameter expansion on the cross section of said annular section is outstanding; It forms for said annular section with being inclined upwardly, and the elasticity support is carried out to the top in the interior wheel bottom of said bearing.

4. mower according to claim 3 is used over cap; It is characterized in that; Also comprise the second foreign matter breaking member, it releasably is incorporated into the bottom surface of said baffle, and supports the foreign steamer of said bearing; Shape with around the bottom of said bearing forms, and the blocking-up foreign matter flow in the said bearing.

5. mower according to claim 4 is used over cap; It is characterized in that, also comprise the asessory shaft holding components, it is installed on second slot part of said insertion section; So that when the reduced diameter of said driving shaft, can install; Releasably be formed at said insertion section,, and be formed with the through hole of internal diameter less than said second internal diameter so that extend to said the 3rd slot part.

6. a mower that is installed on the blade bottom of mower is used bearing unit with over cap, it is characterized in that, comprising:

Bearing, it comprise interior wheel with hollow hollow bulb and angle with one heart be bonded to said in the foreign steamer in the wheel outside so that can rotate relatively to said interior wheel,

The axle holding components; It comprises the hollow bulb that is inserted into said bearing and is formed with a through hole; Make the insertion section that the driving shaft of mower blade connects, the top that is formed on said insertion section; Its external diameter is greater than the external diameter of insertion section, and the support sector of being close to the bottom surface of mower blade, through introducing ground along the mount grooves that periphery forms towards center position, be installed in the lateral surface of the bottom of said insertion section; And the interior wheel of the said bearing that is inserted into the outside, said insertion section carried out the elasticity support to the top, and said bearing is bundled to the retaining ring of said insertion section;

In the said axle holding components, the medial surface that above said support sector, is connected to the axle through hole of said insertion section comprises:

First slot part, it forms downwards with introducing, so that separate with the blade central portion of said mower;

7. bearing unit according to claim 6; It is characterized in that; Also comprise the first foreign matter breaking member, it is on the top of the said baffle of the bottom that is installed on said mower blade, in the position that exceeds said axle holding components; Be bonded to said baffle, so that foreign steamer along circumferencial direction around said bearing;

The said first foreign matter breaking member comprises:

Cylindrical portion, it is outstanding to the top from said first rim part, and inner peripheral surface is in reverse to the foreign steamer of said bearing, and it highly is lower than said bearing; And

8. bearing unit according to claim 7; It is characterized in that; On the ceiling surface of the 4th slot part of said insertion section, also be formed with a plurality of combinations and strengthen projections; It carries out the adhesion between the said insertion section of the hold-down nut that screw combines in order to improve with the screw thread of the driving shaft that is formed on said mower blade, and is outstanding downwards isolator each other;

9. bearing unit according to claim 8 is characterized in that, also comprises the second foreign matter breaking member; It releasably is incorporated into the bottom surface of said baffle; And support the foreign steamer of said bearing, and forming with shape around the bottom of said bearing, the blocking-up foreign matter flow in the said bearing.

10. bearing unit according to claim 9; It is characterized in that, also comprise the asessory shaft holding components, it is installed on second slot part of said insertion section; So that when the reduced diameter of said driving shaft, can install; Releasably be formed at said insertion section,, be formed with the through hole of internal diameter less than said second internal diameter so that extend to said the 3rd slot part.