CN218302271U - Working head structure and handheld garden tool - Google Patents

Abstract

The utility model relates to a gardens facility technical field specifically discloses working head structure and hand-held type garden instrument. The structure comprises a driving component and a working head; the driving assembly comprises a driving main body and a rotating shaft, the driving main body is used for driving the rotating shaft to rotate around the axis of the rotating shaft, the rotating shaft is sequentially provided with a first connecting section and a second connecting section in the direction close to the driving main body, and the diameter of the first connecting section is smaller than that of the second connecting section; the working head is a first working head or a second working head; the first working head is in locking connection with the first connecting section, the second working head comprises a second working head main body, and an assembling through hole penetrates through the second working head main body; the rotating shaft is connected to the assembling through hole in a locking mode, or the rotating shaft penetrates through the assembling through hole, the locking piece is connected with the second connecting section in a locking mode, and the second working head main body is fixed on the second connecting section. The structure utilizes different connecting sections to be connected with the corresponding working heads, so that the matching tightness is ensured, and the replacement speed of the working heads is accelerated.

Description

Working head structure and handheld garden tool

Technical Field

The utility model relates to a gardens facility technical field especially relates to working head structure and hand-held type garden instrument.

Background

At present, grass trimmers on the market are partly equipped with self-paying-off grass trimmers and partly with brush cutters. If the weeder needs the two different forms of the grass trimmers at the same time, two pieces of equipment need to be purchased, the overall price of the two pieces of equipment is high, and the two pieces of equipment are inconvenient to carry during operation.

Therefore, a garden tool with a machine body adapted to multiple working heads is needed, which can be adapted to a self-paying-off grass mowing head and a cutting and irrigating head. The garden tool can complete the driving and complete the weeding work from the paying-off grass mowing head and the brush cutting head by penetrating the rotating shaft of the driving assembly into the center holes of the paying-off grass mowing head and the brush cutting head. However, the requirements of the self-paying-off grass mowing head and the brush cutter head on the aperture of the central hole are different, and the aperture of the central hole of the self-paying-off grass mowing head is selected to be 5 mm in consideration of the internal structure of the self-paying-off grass mowing head; considering that the cutting and irrigating cutter head needs to bear larger torque, the aperture of the central hole is selected to be 8-10 mm. This results in the output shaft to be difficult to guarantee with the close fit of centre bore, has brought the degree of difficulty for the replacement of working head, has influenced garden instrument's high-efficient operation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a working head structure and hand-held type garden instrument to the cooperation of guarantee output shaft and centre bore is inseparable, solves the problem that the working head replacement is inefficiency.

To achieve the purpose, the utility model adopts the following technical proposal:

the working head structure comprises a driving component and a working head; the driving assembly comprises a driving main body and a rotating shaft, the driving main body is used for driving the rotating shaft to rotate around the axis of the rotating shaft, a first connecting section and a second connecting section are sequentially arranged on the rotating shaft in the direction close to the driving main body, and the diameter of the first connecting section is smaller than that of the second connecting section; the working head is a first working head or a second working head; the first working head is in locking connection with the first connecting section, the second working head comprises a second working head main body, and an assembling through hole penetrates through the second working head main body; the rotating shaft is connected with the assembling through hole in a locking mode, or the rotating shaft penetrates through the assembling through hole, the locking piece is connected with the second connecting section in a locking mode, and the second working head main body is fixed on the second connecting section.

As the preferable technical scheme of the working head structure, the first working head is provided with an assembling blind hole, and the assembling blind hole is in locking connection with the first connecting section.

The first working head comprises a first working head main body, the assembling blind hole is formed in the first working head main body, an inner insert is fixedly connected to the hole bottom of the assembling blind hole, and the inner insert is in locking connection with the first connecting section.

As a preferred technical scheme of the working head structure, the first connecting section is a threaded shaft, the embedded piece is an embedded bolt, and the embedded piece is in threaded connection with the first connecting section.

As a preferable technical scheme of the working head structure, the locking piece is pressed against one side of the second working head main body, which is far away from the driving main body.

As the preferred technical scheme of work head structure, the second linkage segment is the threaded shaft, the retaining member is locking bolt, the retaining member with the spiro union of second linkage segment.

As the preferred technical scheme of the working head structure, the second connecting section is a threaded shaft, the assembling through hole is a threaded hole, and the assembling through hole is in threaded connection with the second connecting section.

The handheld garden tool comprises a tool main body and the working head structure, wherein the tool main body comprises a connecting rod, two ends of the connecting rod are respectively provided with a control module and a working head module, and the control module is used for controlling the driving assembly to start or stop running.

As a preferred technical solution of the hand-held garden tool, the control module comprises a rear handle assembly; hand-held type garden instrument still includes the battery package, the battery package be used for to drive assembly provides electric power, battery package demountable installation in back handle subassembly.

As a preferred technical solution of the hand-held garden tool, the control module comprises a rear handle assembly; the handheld garden tool further comprises an internal combustion engine for transmitting power to the drive assembly, the internal combustion engine being provided at the rear handle assembly or the work head module.

The utility model has the advantages that:

the working head structure utilizes the first connecting section and the second connecting section which are arranged on the rotating shaft, and can realize the tight fit of different working heads through the design that the first connecting section is in locking connection with the first working head and the second connecting section is in locking connection with the second working head, thereby ensuring the tightness degree of the fit of the working heads and the rotating shaft and quickening the replacement speed of the working heads. The first connecting section and the second connecting section are arranged in sequence, the diameter of the first connecting section and the diameter of the second connecting section are reduced, the structure of the rotating shaft is simplified, the space occupied by the rotating shaft is reduced, and the working head can be conveniently disassembled and assembled on the rotating shaft. The design of utilizing equipment through-hole or retaining member and second linkage segment locking connection can realize the fixed to second working head main part to reduced the adverse effect that the second working head led to the fact to first linkage segment, be favorable to reducing the risk that the axis of rotation harmd, prolonged the life of working head structure.

Drawings

Fig. 1 is a schematic structural diagram of a handheld garden tool provided by an embodiment of the present invention;

fig. 2 is an exploded view of a handheld garden tool provided by an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a driving assembly provided in an embodiment of the present invention;

FIG. 4 is a partial cross-sectional view of the handheld garden tool with the first working head assembled therein according to an embodiment of the present invention;

fig. 5 is a partial sectional view of the handheld garden tool with the second working head assembled thereon according to the embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1-5, the present embodiment provides a working head structure, which includes a driving assembly 200 and a working head; the driving assembly 200 comprises a driving main body 210 and a rotating shaft 220, the driving main body 210 is used for driving the rotating shaft 220 to rotate around the axis of the rotating shaft 220, the rotating shaft 220 is successively provided with a first connecting section 221 and a second connecting section 222 in the direction close to the driving main body 210, and the diameter of the first connecting section 221 is smaller than that of the second connecting section 222; the working head is a first working head 300 or a second working head 400; the first working head 300 is connected with the first connecting section 221 in a locking manner, the second working head 400 comprises a second working head main body 410, and an assembling through hole penetrates through the second working head main body 410; the rotating shaft 220 is locked and connected to the assembling through hole, or the rotating shaft 220 passes through the assembling through hole, the locking member 420 is locked and connected to the second coupling section 222, and the second working head main body 410 is fixed to the second coupling section 222.

The working head structure utilizes the first connection section 221 and the second connection section 222 arranged on the rotating shaft 220, and can realize tight fit of different working heads through the design that the first connection section 221 is in locking connection with the first working head 300 and the second connection section 222 is in locking connection with the second working head 400, thereby ensuring the tightness degree of fit of the working heads and the rotating shaft 220 and accelerating the replacement speed of the working heads. The design that the first connecting section 221 and the second connecting section 222 are arranged in sequence and the diameters of the first connecting section and the second connecting section are reduced simplifies the structure of the rotating shaft 220, reduces the space occupied by the rotating shaft 220, and facilitates the assembly and disassembly of the working head on the rotating shaft 220. By utilizing the design of locking connection between the assembling through hole or the locking member 420 and the second connection section 222, the second working head main body 410 can be fixed, so that adverse effects of the second working head 400 on the first connection section 221 are reduced, the risk of damage to the rotating shaft 220 is reduced, and the service life of the working head structure is prolonged.

Specifically, the driving body 210 is a motor, the first working head 300 is a self-paying-off grass-mowing head, and the second working head 400 is a brush-cutting head.

In other embodiments of the present embodiment, at least three connecting sections are disposed on the rotating shaft 220, and the diameters of the connecting sections gradually decrease along a direction away from the driving main body 210, so that the driving assembly 200 can be adapted to more types of working heads, and the connection manner and the mounting and dismounting process thereof can be deduced by analogy with the above-mentioned schemes.

In the embodiment, the first working head 300 has a blind assembly hole, and the blind assembly hole is connected to the first connection section 221 in a locking manner. The assembly blind hole and the first connection section 221 have a compact matching structure, occupy a small space and have high connection stability, which is helpful for simplifying the structure of the first working head 300 and reducing the processing difficulty of the working head structure.

Preferably, the first working head 300 includes a first working head main body 310, the assembly blind hole is opened in the first working head main body 310, an insert 320 is fixedly connected to a hole bottom of the assembly blind hole, and the insert 320 is in locking connection with the first connection section 221. The arrangement of the insert 320 ensures that the assembly blind hole can be locked and connected with the first connection section 221, and ensures the stability of the connection between the first working head 300 and the rotating shaft 220.

Further, the first connection section 221 is a threaded shaft, the insert 320 is an embedded bolt, and the insert 320 is screwed with the first connection section 221. The threaded shaft is simple and reliable in matching with the embedded bolt, small in occupied space and stable in connection, and smooth operation of the working head structure is guaranteed.

Preferably, the first connection section 221 is threaded in a direction opposite to the rotation direction of the rotation shaft 220. The design ensures that the first working head 300 is screwed more and more tightly along with the rotation of the rotating shaft 220 when the working head structure operates, so that the first working head 300 is prevented from loosening in the working process, the risk of position deviation of the insert 320 relative to the first connecting section 221 is greatly reduced, the risk of falling off of the first working head 300 due to accidents is effectively avoided, and the working stability and the use safety of the working head structure are ensured.

In this embodiment, the locking member 420 is pressed against the side of the second working head body 410 away from the driving body 210. The structure is simple and reliable, the structure is compact, the connection stability is high, and the second working head main body 410 can be smoothly fixed on the second connecting section 222 by utilizing the close contact between the locking member 420 and the second working head main body 410 and the locking connection between the locking member 420 and the second connecting section 222.

In one embodiment of this embodiment, the second connecting section 222 is a threaded shaft, the locking member 420 is a locking bolt, and the locking member 420 is screwed with the second connecting section 222. The threaded shaft is simple and reliable in matching with the locking bolt, small in occupied space and stable in connection, and smooth operation of the working head structure is guaranteed.

In another embodiment of the present embodiment, the second connection section 222 is a threaded shaft, the assembling through hole is a threaded hole, and the assembling through hole is screwed with the second connection section 222. The structure is simple and reliable, the occupied space is small, the connection stability is high, and the locking connection between the second working head 400 and the second connection section 222 can be smoothly realized.

Preferably, the second coupling section 222 is threaded in a direction opposite to the rotation direction of the rotation shaft 220. Above design has guaranteed that the working head structure is when moving, and the second working head 400 can be along with the rotation of axis of rotation 220 more screw up more tightly, has prevented that second working head 400 from taking place not hard up in the course of the work, has reduced the risk that retaining member 420 takes place offset relative to second linkage segment 222 by a wide margin to avoid second working head 400 effectively because of unexpected not hard up risk that drops even, guaranteed the job stabilization nature and the safety in utilization of working head structure.

The embodiment also provides a handheld garden tool, which comprises a tool main body 100 and the working head structure, wherein the tool main body 100 comprises a connecting rod 110, two ends of the connecting rod 110 are respectively provided with a control module and a working head module, and the control module is used for controlling the driving assembly 200 to start or stop running. The setting of control module makes weeder can control the operation of work head structure accurately, has reduced weeder's work load, has improved hand-held type garden instrument's work efficiency.

Preferably, the side surface of the rotating shaft 220 is provided with a locking groove 223, and the working head module further comprises a limiting member, wherein the limiting member can be matched with the locking groove 223 to lock the rotating shaft 220, so that the rotating shaft 220 stops rotating. The setting of restriction piece and locking groove 223 for weed killer can stop drive assembly 200 scram, can in time stop the rotation of working head from this, has reduced the danger that hand-held type garden instrument continues to operate and causes by a wide margin, has promoted hand-held type garden instrument's safety in utilization effectively. The restriction piece is matched with the locking groove 223, and meanwhile, the working head can be used during replacement, so that the rotating shaft 220 is prevented from rotating in the process of disassembling and assembling the working head, and the efficiency of replacing the working head is improved.

Specifically, the locking groove 223 forms a flat surface on the side of the rotation shaft 220, extending to a portion of the second connection section 222.

The working head module further comprises a front handle 120 and a protective cover 150, wherein the front handle 120 is fixedly connected to the connecting rod 110 and is arranged for facilitating holding of an operator and facilitating flexible control of the handheld garden tool by a weed killer; the protective cover 150 partially surrounds the working head, the protective effect on the working head is improved due to the protective cover 150, the impact caused by scattered grass blades and sundries cut by the working head is reduced, the risk of accidents is reduced, and the use safety of the handheld garden tool is further improved.

In one implementation of this embodiment, the control module includes a rear handle assembly 130; the handheld garden tool further comprises a battery pack for providing power to the driving assembly 200, the battery pack being detachably mounted to the rear handle assembly 130. The above design realizes power supply to the driving assembly 200 by using the battery pack, and ensures smooth operation of the driving assembly 200.

In this embodiment, the working head module includes a motor casing 160, the motor casing 160 forms a motor cavity 161, the driving main body 210 is disposed in the motor cavity 161, and the rotating shaft 220 extends out of the motor cavity 161. The motor casing 160 has the effects of positioning and protecting the driving assembly 200, so that the risk of damage to the driving assembly 200 is reduced while the position deviation of the working head structure is avoided, the service life of the handheld garden tool is prolonged, and the maintenance frequency is reduced.

Specifically, the rear handle assembly 130 is provided with a battery pack mounting portion in which the battery pack is detachably mounted. Above structural design simple structure and occupation space are little, have made things convenient for the dismouting of battery package, have improved the efficiency that the battery package was changed.

The control module further includes a working switch 140, and the working switch 140 can selectively connect or disconnect the rear handle assembly 130 and the control driving assembly 200, so that the hand-held garden tool can smoothly operate under the control of the weeder.

In another embodiment of this embodiment, the handheld garden tool further comprises an internal combustion engine for transmitting power to the driving assembly 200, and the internal combustion engine is provided at the rear handle assembly 130 or the working head module.

When the internal combustion engine is arranged on the rear handle assembly 130, the internal combustion engine transmits power to the working head module through a transmission shaft arranged in the connecting rod 110, and the transmission shaft is taken as a rotating shaft 220 to directly drive the working head; or the transmission shaft is connected with the working head through the reduction gearbox, and the output shaft of the reduction gearbox is taken as the transmission shaft 220. When the internal combustion engine is arranged on the working head module, the output shaft of the internal combustion engine is taken as the rotating shaft 220 to directly drive the working head; or the output shaft of the reduction gearbox is taken as the transmission shaft 220, and the output shaft of the internal combustion engine is connected with the working head through the reduction gearbox.

Specifically, the internal combustion engine is generally a four-stroke gasoline engine or a two-stroke gasoline engine.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. Working head structure, its characterized in that includes:

the driving assembly comprises a driving main body and a rotating shaft, the driving main body is used for driving the rotating shaft to rotate around the axis of the rotating shaft, a first connecting section and a second connecting section are sequentially arranged on the rotating shaft in the direction close to the driving main body, and the diameter of the first connecting section is smaller than that of the second connecting section;

the working head is a first working head or a second working head; the first working head is in locking connection with the first connecting section, the second working head comprises a second working head main body, and an assembling through hole penetrates through the second working head main body; the rotating shaft is locked and connected with the assembly through hole, or

The rotating shaft penetrates through the assembling through hole, the locking piece is in locking connection with the second connecting section, and the second working head main body is fixed on the second connecting section.

2. The working head structure of claim 1, wherein the first working head is provided with a blind assembly hole, and the blind assembly hole is connected with the first connecting section in a locking manner.

3. The working head structure of claim 2 wherein the first working head comprises a first working head main body, the assembly blind hole is formed in the first working head main body, an insert is fixedly connected to the bottom of the assembly blind hole, and the insert is in locking connection with the first connecting section.

4. The working head structure of claim 3 wherein said first connecting section is a threaded shaft and said insert is an insert bolt, said insert being threadably engaged with said first connecting section.

5. A working head structure as claimed in claim 1 wherein the retaining member bears against a side of the second working head body remote from the drive body.

6. The working head structure of claim 5 wherein said second connecting section is a threaded shaft and said retaining member is a retaining bolt, said retaining member being threadably engaged with said second connecting section.

7. A working head structure as claimed in claim 1, wherein the second connecting section is a threaded shaft, the assembly through-hole is a threaded hole, and the assembly through-hole is threadedly engaged with the second connecting section.

8. The handheld garden tool is characterized by comprising a tool main body and the working head structure as claimed in any one of claims 1 to 7, wherein the tool main body comprises a connecting rod, a control module and a working head module are respectively arranged at two ends of the connecting rod, and the control module is used for controlling the driving assembly to start or stop running.

9. The handheld garden tool of claim 8, wherein the control module comprises a rear handle assembly; hand-held type garden instrument still includes the battery package, the battery package be used for to drive assembly provides electric power, battery package demountable installation in back handle subassembly.

10. The handheld garden tool of claim 8, wherein the control module comprises a rear handle assembly; the handheld garden tool further comprises an internal combustion engine for transmitting power to the drive assembly, the internal combustion engine being provided at the rear handle assembly or the work head module.

Images