CN115462251A

CN115462251A - Garden tool

Info

Publication number: CN115462251A
Application number: CN202110653595.0A
Authority: CN
Inventors: 马永兴; 霍晓辉; 张林高; 李剑波
Original assignee: Globe Jiangsu Co Ltd
Current assignee: Globe Jiangsu Co Ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2022-12-13
Anticipated expiration: 2041-06-11
Also published as: CN115462251B

Abstract

The invention discloses a garden tool, which comprises a main machine shell; the linear motor is accommodated in the host machine shell; the motor damping assembly is accommodated in the host machine shell and assembled on a motor output shaft of the linear motor; and the working assembly is connected with the motor damping assembly and driven by the linear motor to reciprocate. The garden tool provided by the invention has the advantages that a high-precision and high-strength gear transmission system is omitted, the cost is reduced, the weight is reduced, the use comfort is improved, and the impact force on the mandrel of the linear motor generated when the working assembly works can be effectively reduced.

Description

Garden tool

Technical Field

The invention relates to a garden tool, in particular to a garden tool using a linear motor.

Background

An electric pruning machine is a garden tool used for pruning various dwarf trees, hedges, green plants and other outdoor plants. The output shaft of the motor used by the existing pruner in the market is in rotary motion, and the rotary kinetic energy is transmitted to the cutter bar of the cutter bar assembly through the gear, so that the reciprocating motion of the cutter bar is realized. This transmission mode has high requirements on the precision and strength of the gear, increases the cost of the product, and is also heavy.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a garden tool, which solves the technical problems of the prior art, such as the dependence of the garden tool on a gear transmission system, high cost and heavy weight.

To achieve the above and other related objects, the present invention provides a pruner, comprising:

a host housing;

the linear motor is accommodated in the host machine shell;

the motor damping assembly is accommodated in the host machine shell and assembled on a motor output shaft of the linear motor;

and the working assembly is connected with the motor damping assembly and driven by the linear motor to reciprocate.

In an alternative embodiment of the present invention, the moving direction of the output shaft of the motor and the moving direction of the working assembly are located on the same axis.

In an alternative embodiment of the invention, the working assembly performs a periodic reciprocating motion with the linear motor.

In an alternative embodiment of the invention, the working assembly performs a non-periodic reciprocating motion with the linear motor.

In an optional embodiment of the invention, the motor damping assembly comprises a damping sleeve, a connecting rod, a first damping spring, a second damping spring and a T-shaped sleeve, wherein the first damping spring, the second damping spring and the T-shaped sleeve are accommodated in an inner cavity of the damping sleeve; the T-shaped sleeve comprises a tubular main body part and an annular head part, a motor output shaft of the linear motor is inserted into and fixed in the T-shaped sleeve, the first damping spring is sleeved on the tubular main body part, one end of the connecting rod is connected with the damping sleeve, and the other end of the connecting rod is connected with the working assembly.

In an alternative embodiment of the present invention, the output shaft of the motor is inserted into the T-shaped sleeve and fixed by a pin.

In an alternative embodiment of the invention, the annular head is provided with a reservoir structure.

In an alternative embodiment of the invention, the oil reservoir structure comprises an oil reservoir provided on a side wall of the annular head portion.

In an alternative embodiment of the invention, the damping sleeve comprises a first damping sleeve and a second damping sleeve which are fixed in a radial butt joint mode.

In an alternative embodiment of the present invention, the connecting rod and the first damping sleeve are an integral structure or two independent components.

In an alternative embodiment of the invention, the link and the second shock absorber are of an integral structure or two separate parts.

In an alternative embodiment of the present invention, an opening is provided at an end of the damping sleeve adjacent to the linear motor, and the tubular body portion is capable of reciprocating through the opening.

In an optional embodiment of the present invention, the host housing includes a first housing and a second housing, and the first housing and the second housing cover each other to form a receiving cavity for receiving the linear motor and the motor damping assembly.

In an optional embodiment of the invention, the garden tool comprises a pruner, and the working assembly is a blade assembly.

In an optional embodiment of the present invention, the blade assembly includes a first blade and a second blade, the first blade is connected to the motor damping assembly, and the second blade is fixed to the main machine housing.

In an optional embodiment of the present invention, bosses are disposed on the first blade and the second blade, the first blade is connected to the main machine case through the bosses, and the second blade is connected to the motor damping assembly through the bosses.

According to the garden tool, the motor damping component replaces a gear transmission system to complete power transmission, the gear transmission system with high precision and strength is omitted, the cost is reduced, the weight is reduced, and the use comfort is improved.

According to the garden tool, the motor damping assembly is arranged between the motor output shaft of the linear motor and the working assembly, so that impact force generated on the mandrel of the linear motor when the working assembly works can be effectively reduced.

The motor damping assembly of the garden tool is designed, so that the impact force of the motor output shaft on the damping sleeve of the motor damping assembly can be effectively reduced when the working assembly works.

According to the motor damping assembly of the garden tool, due to the fact that the T-shaped sleeve and the damping sleeve have certain relative movement, even if the working assembly is stuck, the linear motor can still move continuously, and the situation that the cutter bar is stuck is automatically eliminated.

Drawings

Fig. 1 is a schematic perspective view of the pruner of the present invention.

Fig. 2 shows an exploded view of the pruner of the present invention.

Fig. 3 shows a partial enlargement of the oval area in fig. 2.

Fig. 4 is a perspective view illustrating a motor damping assembly of the pruner according to the present invention.

Fig. 5 shows an exploded view of the motor damping assembly of the pruner of the present invention.

Fig. 6 shows a partial cross-sectional view of the motor damping assembly of the pruner of the present invention.

Fig. 7 is a schematic perspective view of a T-shaped bushing of a motor damping assembly of the pruner according to the present invention.

Description of the reference symbols

The main frame body 1, the first body shell 11, the second body shell 12, the blade assembly 2, the first blade 21, the second blade 22, the protection plate 23, the boss 24, the handle assembly 3, the rear handle 31, the front handle 32, the shield 33, the linear motor 4, the motor output shaft 41, the motor damping assembly 5, the damping sleeve 51, the first damping sleeve 511, the second damping sleeve 512, the butt joint installation part 513, the containing cavity 514, the first damping spring 52, the T-shaped sleeve 53, the tubular main body part 531, the head part 532, the oil storage groove 533, the pin hole 534, the pin shaft 54, the second damping spring 55, the connecting rod 56, the annular limiting groove 561, the blade connecting part 562 and the opening 563.

Detailed Description

The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

Please refer to fig. 1-7. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.

Referring to fig. 1 and 2, the present invention discloses a gardening tool driven by a linear motor, which is a motor directly converting electric energy into linear motion mechanical energy without any transmission device of an intermediate conversion structure. The garden tool driven by the linear motor can take a pruner as an example and comprises a main machine shell 1, a handle component 3 arranged on the main machine shell 1, a power mechanism accommodated in the main machine shell 1 and a working component connected with the power mechanism, wherein the power mechanism comprises a linear motor 4 and a motor damping component 5 accommodated in the main machine shell 1. The working assembly is a knife bar assembly 2, and the knife bar assembly 2 realizes the cutting function through the periodic or non-periodic reciprocating motion generated in the motion direction by a linear motor 4 arranged on the motion axis. The moving direction of the mover of the linear motor 4 is on the same axis as the moving direction of the blade assembly 2. The motor damping assembly 5 is arranged between the linear motor 4 and the cutter bar assembly 2, so that the impact force of a rotor of the linear motor 4 on the pruning machine is reduced. The motion stroke of the rotor of the linear motor 4 is consistent with the motion stroke of the cutter bar of the pruner.

Referring to fig. 1, in the present invention, the handle assembly 3 includes a rear handle 31, a front handle 32 and a protective cover 33, the rear handle 31 is a grippable handle structure having a cavity, and a main switch, a speed-adjusting switch and the like are at least partially disposed in the cavity of the rear handle 31 for user operation. The rear handle 31 is arranged at the rear end of the host machine shell 1, and the front handle 32 is arranged close to the blade assembly 2, so that a user can conveniently hold and safely start protection. A shield 33 is mounted on the front handle 32 for shielding purposes.

For convenience of explaining the technical scheme of the present invention, up, down, front, back, left and right arrows shown in fig. 1 are also defined. The upper, lower, left and right in this embodiment take the state of the pruner in fig. 1 as an example.

Referring to fig. 1 to 3, in the present invention, a linear motor 4 is disposed between a rear handle 31 and a front handle 32, the linear motor 4 drives a blade assembly 2 to reciprocate through a motor damping assembly 5, and the motor damping assembly 5 is assembled on a mover, i.e., a motor output shaft 41, of the linear motor 4.

Referring to fig. 4-6, in the present invention, the motor damping assembly 5 includes a damping sleeve 51, a connecting rod 56, and a first damping spring 52, a second damping spring 55 and a T-shaped sleeve 53 which are disposed in the damping sleeve 51. The damping sleeve 51 includes a first damping sleeve 511 and a second damping sleeve 512, the first damping sleeve 511 and the second damping sleeve 512 are integrally of a semi-circular tubular structure, and the first damping sleeve 511 and the second damping sleeve 512 form a receiving cavity 514 to receive the first damping spring 52, the second damping spring 55 and the T-shaped sleeve 53.

Referring to fig. 4-6, in the present invention, a plurality of abutting mounting portions 513 are disposed on outer walls of the first damping sleeve 511 and the second damping sleeve 512, threaded holes for bolts to pass through are disposed on the abutting mounting portions 513, and the first damping sleeve 511 and the second damping sleeve 512 are abutted along a radial direction and fixed by bolts and nuts (of course, a welding manner may also be adopted) to form an accommodating chamber 514. The accommodating chamber 514 is sequentially provided with a first damping spring 52, a T-shaped sleeve 53 and a second damping spring 55 from back to front.

Referring to fig. 4-6, in the present invention, the T-shaped sleeve 53 includes a tubular main body 531 and an annular head 532 formed outward from one end of the tubular main body 531, the first damping spring 52 is sleeved on the tubular main body 531 of the T-shaped sleeve 53, two ends of the first damping spring 52 respectively abut against the head 532 of the T-shaped sleeve 53 and the rear end of the inner wall of the damping sleeve 51, and the second damping spring 55 abuts against the head 532 of the T-shaped sleeve 53 and the front end of the inner wall of the damping sleeve 51; one end of the connecting rod 56 is clamped on the damping sleeve 51, and the other end is connected with the boss 24 of one of the knife strips of the knife strip assembly 2. The T-shaped sleeve 53 is fixedly connected with the motor output shaft 41 of the linear motor 4.

Referring to fig. 4-6, in the present invention, the front end of the damping sleeve 51 is provided with an opening through which the tubular main body 531 of the T-shaped sleeve 53 can pass in a reciprocating manner, when the motor output shaft 41 of the linear motor 4 moves forward, the T-shaped sleeve 53 is driven to move forward, the head 532 of the T-shaped sleeve 53 abuts against the second damping spring 55, and the second damping spring 55 pushes the damping sleeve 51 to move forward, thereby driving the connecting rod 56 and the blade connected to the connecting rod 56 to move forward. This prevents the shock-absorbing housing 51 from being greatly impacted when the motor output shaft 41 moves forward. The second damper spring 55 is gradually deformed according to the movement of the motor output shaft 41, so that the pressing force against the damper sleeve 51 is gradually increased and finally reaches a constant value. When the motor output shaft 41 moves to the stroke end point, the motor output shaft 41 moves backwards in a reverse direction, at this time, the damping sleeve 51 and the cutter bar still move forwards due to inertia, the head 532 of the T-shaped sleeve 53 abuts against the first damping spring 52 and gradually compresses the first damping spring 52, the first damping spring 52 is gradually deformed along with the movement of the motor output shaft 41, so that the pressure on the damping sleeve 51 is gradually increased and finally reaches a fixed value, the movement direction of the damping sleeve 51 and the cutter bar assembly is changed from forwards to backwards, and the change time of the movement direction is prolonged due to the buffering of the damping spring, so that the impact force between the T-shaped sleeve and the damping sleeve 51 is reduced. Since part of the energy of the output shaft 41 of the linear motor 4 at the beginning of the reciprocating motion is absorbed by the damping spring, the force applied to the blade bar is the largest when the pressure of the damping spring on the damping sleeve 41 reaches a certain value. So that the force applied to the blade bar changes periodically during the reciprocating motion of the motor output shaft 41 of the linear motor 4.

It is understood that in one embodiment, the connecting rod 56 may be of unitary construction with the first damping sleeve 511 or both may be two separate components; in another embodiment, the connecting rod 56 and the second damping sleeve 512 are integrally formed or are separate components.

The pruner adopts the motor damping component 5, so that the impact force of the rotor of the linear motor 4 on the damping sleeve 51 can be relieved, and the impact force of the pruner on the linear motor can be buffered when the pruner shears shrubs. The motor of current pruner is connected with adopting drive mechanism between the sword strip, and drive mechanism is mostly the gear box, can't cushion between each subassembly of this connected mode, and when the pruner cut thick bush, the impact force of sword strip can feed back on drive mechanism, causes the damage to it. In the invention, the motor damping component 5 is arranged between the linear motor 4 and the cutter bar component 2, and the impact force of the cutter bar component 2 during working can be relieved by the motor damping component 5. In addition, because the T-shaped sleeve 53 and the damping sleeve 51 have certain relative movement, even if the blade assembly 2 is jammed, the linear motor 4 can still move, and the jamming of the blade is automatically relieved.

Referring to fig. 4-6, in the present invention, a pin hole is formed on the motor output shaft 41 of the linear motor 4, a pin hole 534 is correspondingly formed on the T-shaped sleeve 53, and the motor output shaft 41 is inserted into the T-shaped sleeve 53 from an end close to the linear motor 4 and is fixed by a pin 54.

It will be appreciated that in an alternative embodiment, external threads may be provided on the motor output shaft 41 and internal threads may be provided in the T-shaped sleeve. The motor output shaft 41 penetrates through an opening at one end of the T-shaped sleeve 53, so that the T-shaped sleeve 53 is sleeved and fixed on the motor output shaft 41 of the linear motor 4 and is fastened and connected through a fastening nut. It will be appreciated that in an alternative embodiment, the T-shaped sleeve 53 and the motor output shaft 41 of the linear motor 4 may be fixed together by the pin 54 and the fastening nut.

Referring to fig. 4-6, in the present invention, the side wall of the rear end of the connecting rod 56 is formed with an annular limiting groove 561, the connecting rod 56 is assembled on the rear end of the damping sleeve 51 through the annular limiting groove 561, and the side walls of the two sides of the annular limiting groove 561 are respectively located on the two sides of the opening of the rear end of the damping sleeve 51, so that the connecting rod 56 can be prevented from falling off the damping sleeve 51. The front end of the connecting rod 56 is located outside the damping sleeve 51, and as the connecting part 562 with the knife strip, an opening 563 matched with the boss 54 of the knife strip is formed on the connecting part 562 with the knife strip, and the connecting rod 56 can be connected with the boss 24 of the knife strip through the opening 563.

In the present invention, the head 532 of the T-shaped casing 53 is provided with an oil reservoir. As shown in fig. 7, the oil reservoir may be, for example, a plurality of oil reservoirs 533 provided on a side wall of the head 532 of the T-shaped sleeve 53, the plurality of oil reservoirs 533 being provided at intervals along the circumferential direction of the head 532 of the T-shaped sleeve 53, the oil reservoirs 533 extending from one end of the head 532 to the other end of the head 532, and the oil reservoirs 533 can store grease therein and perform a lubricating function when the T-shaped sleeve 53 reciprocates. It will be appreciated that in other embodiments, the oil retaining structure may be a circular hole or other suitable shape that can retain grease.

In one embodiment of the present invention, the blade assembly 2 includes a pair of blades stacked one above the other, that is, a first blade 21, a second blade 22 and a protection plate 23, the first blade 21 is detachably connected to a power mechanism and can reciprocate with the power mechanism to perform a shearing operation, and the second blade 22 is fixed on the main machine housing 1; the rear end of the protection plate 23 is fixedly connected with the host machine shell 1, the protection plate 23 is arranged right above the cutter bars 21 and 22, and the first cutter bar 21 can move relative to the protection plate 23. The first blade bar 21 and the second blade bar 22 are provided with a body portion extending in the front-rear direction and blade tooth portions arranged on the left side and the right side of the portion of the body portion extending out of the housing, the blade tooth portions are used for cutting vegetation, the number of the blade tooth portions is multiple, the blade tooth portions are respectively arranged on the two opposite sides of the width direction of the body portion, namely, the blade tooth portions are arranged on the left side and the right side of the body portion, the blade tooth portion on the left side of the body portion is arranged in a staggered mode relative to the blade tooth portion on the right side of the body portion, therefore, the blade tooth portion on the left side of the body portion is arranged between two adjacent blade tooth portions on the right side of the body portion, and the blade tooth portions and the body portion are integrally formed. It is understood that the cutter tooth portion may be provided on only one side of the body portion.

Referring to fig. 1-3, in the present invention, a cylindrical boss 24 is disposed on one end (rear end) of the main body of the first blade bar 21 and the second blade bar 22 inserted into the main body case 1, and the boss 24 is perpendicular to the longitudinal axis of the blade bars. One end of the first knife strip 21 and one end of the second knife strip 22 of the knife strip assembly 2 extend into the main machine shell 1, the first knife strip 21 can be connected with the motor output shaft 41 of the connecting rod 56 of the motor damping assembly 5, which is far away from the linear motor 4, the second knife strip 22 can be directly fixedly connected with the second machine shell 12 of the main machine shell 1 through the boss 24, the first knife strip 21 can do reciprocating motion along with the linear motor 4 to form shearing action, and the motor damping assembly 5 can buffer impact force generated on the motor output shaft 41 during cutting of the knife strips.

When the linear cutting machine is used, the linear motor 4 transmits power to the first cutter bar 21 through the motor damping component 5 to complete power output, and cutting operation is realized because the linear motor 4 does linear reciprocating motion, wherein the motion direction of the first cutter bar 21 is the same as the motion direction of the motor output shaft 41, and in the cutting operation process, the motor damping component 5 can buffer impact force generated on the motor output shaft 41 during cutter bar cutting.

It will be appreciated that the motor damping assembly 5, the linear motor 4 and the drive of the working assembly (blade assembly 2) of the pruner of the present invention are equally applicable to other garden tools which are driven by a linear motor, such as a single-handed saw.

In conclusion, the garden tool provided by the invention has the advantages that the motor damping assembly replaces a gear transmission system to complete power transmission, the gear transmission system with high precision and strength is eliminated, the cost is reduced, the weight is reduced, and the use comfort is improved. According to the garden tool, the motor damping assembly is arranged between the motor output shaft of the linear motor and the working assembly, so that impact force generated on the mandrel of the linear motor when the working assembly works can be effectively reduced. The motor damping assembly of the garden tool is designed, so that the impact force of the motor output shaft on the damping sleeve of the motor damping assembly can be effectively reduced when the working assembly works. According to the motor damping assembly of the garden tool, due to the fact that the T-shaped sleeve and the damping sleeve have certain relative movement, even if the working assembly is stuck, the linear motor can still move continuously, and the situation that the cutter bar is stuck is automatically eliminated.

In the description herein, numerous specific details are provided, such as examples of components and/or methods, to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that an embodiment of the invention can be practiced without one or more of the specific details, or with other apparatus, systems, assemblies, methods, components, materials, parts, and/or the like. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of embodiments of the invention.

It will also be appreciated that one or more of the elements shown in the figures can also be implemented in a more separated or integrated manner, or even removed for inoperability in some circumstances or provided for usefulness in accordance with a particular application.

Additionally, any labeled arrows in the drawings/figures should be considered only as exemplary, and not limiting, unless otherwise specifically noted. Further, as used herein, the term "or" is generally intended to mean "and/or" unless otherwise indicated. Combinations of components or steps will also be considered as being noted where terminology is foreseen as rendering the ability to separate or combine is unclear.

The above description of illustrated embodiments of the invention, including what is described in the abstract of the specification, is not intended to be exhaustive or to limit the invention to the precise forms disclosed herein. While specific embodiments of, and examples for, the invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention, as those skilled in the relevant art will recognize and appreciate. As indicated, these modifications may be made to the present invention in light of the foregoing description of illustrated embodiments of the present invention and are to be included within the spirit and scope of the present invention.

The systems and methods have been described herein in general terms as the details aid in understanding the invention. Furthermore, various specific details have been given to provide a general understanding of the embodiments of the invention. One skilled in the relevant art will recognize, however, that an embodiment of the invention can be practiced without one or more of the specific details, or with other apparatus, systems, assemblies, methods, components, materials, parts, and/or the like. In other instances, well-known structures, materials, and/or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

Thus, although the present invention has been described herein with reference to particular embodiments thereof, a latitude of modification, various changes and substitutions are intended in the foregoing disclosures, and it will be appreciated that in some instances some features of the invention will be employed without a corresponding use of other features without departing from the scope and spirit of the invention as set forth. Thus, many modifications may be made to adapt a particular situation or material to the essential scope and spirit of the present invention. It is intended that the invention not be limited to the particular terms used in following claims and/or to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Accordingly, the scope of the invention is to be determined solely by the appended claims.

Claims

1. A garden tool, comprising:

a host housing;

the linear motor is accommodated in the host machine shell;

2. The garden tool of claim 1, wherein the direction of movement of the motor output shaft is on the same axis as the direction of movement of the working assembly.

3. The garden tool of claim 1, wherein the working assembly performs a periodic reciprocating motion with the linear motor.

4. The garden tool of claim 1, wherein the working assembly performs a non-periodic reciprocating motion with the linear motor.

5. The garden tool of claim 1, wherein the motor shock assembly comprises a shock sleeve, a connecting rod, and a first shock spring, a second shock spring and a T-shaped sleeve received in an inner cavity of the shock sleeve; the T-shaped sleeve comprises a tubular main body part and an annular head part, a motor output shaft of the linear motor is inserted into and fixed in the T-shaped sleeve, the first damping spring is sleeved on the tubular main body part, one end of the connecting rod is connected with the damping sleeve, and the other end of the connecting rod is connected with the working assembly.

6. The garden tool of claim 5, wherein the motor output shaft is inserted into the T-shaped sleeve and fixed by a pin.

7. The garden tool of claim 5, wherein the annular head is provided with an oil reservoir.

8. The garden tool of claim 7, wherein the oil reservoir structure comprises an oil reservoir provided on a side wall of the annular head portion.

9. The garden tool of claim 5, wherein the shock sleeve is provided with an opening at an end thereof adjacent to the linear motor, the tubular body portion being capable of reciprocating through the opening.

10. The garden tool of claim 1, wherein the main housing comprises a first housing and a second housing that cover each other to form a receiving cavity for receiving the linear motor and the motor damping assembly.

11. The garden tool of claim 1, wherein the working assembly is a blade assembly.

12. The garden tool of claim 11, wherein the blade assembly comprises a first blade coupled to the motor damping assembly and a second blade secured to the main housing.

13. The garden tool of claim 12, wherein the first blade and the second blade are provided with bosses, the first blade is connected with the main machine case through the bosses, and the second blade is connected with the motor damping assembly through the bosses.