Detachable lithium battery multifunctional grass trimmer

Abstract

The present application relates to the field of grass trimmer, especially to a detachable lithium battery multifunctional grass trimmer, which comprises a driving part connected to the bottom of a supporting rod and powered by a battery pack, a driving motor of the driving part drives a grass trimming assembly through a gear set, the driving part comprises a supporting bottom shell connected to the supporting rod through an adjusting shaft sleeve at a movable position, the supporting bottom shell is movably connected to the adjusting shaft sleeve, a first cutter and a second cutter of the grass trimming assembly are nested with each other and rotatably connected to each other, and a limiting ring is welded on the edge of a fixed disc, which can effectively avoid the bending caused by too close during the transverse movement, and can also detect some stones through the limiting ring to avoid the collision between the grass trimming rope and the bottom surface and hard materials during the work, thereby preventing the grass trimming rope from being easily broken.

Description

TECHNICAL FIELD

[0001] The application is a detachable lithium battery multifunctional grass trimmer, which belongs to the field of grass trimmers. BACKGROUND

[0002] A grass trimmer is a mechanical device that uses an internal combustion engine or an electric motor as a power source to trim lawns, gardens or other grasslands. It usually includes a rotating metal blade and a handle-operated lever, and the operator rotates the blade at high speed by pressing the trigger to cut the grass.

[0003] Compared with the traditional internal combustion engine type grass trimmer, the electric type grass trimmer driven by lithium battery is more portable and produces less noise during work, so it is used more frequently in life.

[0004] The current electric grass trimmer uses nylon rope to cut fine grass, which can reduce the use cost and reduce the risk when encountering stones, but it cannot cut thick plant branches, and the grass trimmer head with a rope is too close in use, which can easily cause friction on the surface of the grass trimmer head, and the service life of the grass trimmer rope is greatly reduced. SUMMARY

[0005] In view of the deficiencies of the prior art, the application aims to provide a detachable lithium battery multifunctional grass trimmer to solve the problems that the rope of the grass trimmer head cannot cut thick plant branches, and the grass trimmer head with a rope is too close in use, which can easily cause friction on the surface of the grass trimmer head, and the service life of the grass trimmer rope is greatly reduced.

[0006] In order to achieve the above-mentioned purpose, the application is realized by the following technical scheme: a detachable lithium battery multifunctional grass trimmer, which comprises a support rod, a holding handle installed on the surface of the support rod, and a handle installed at the top of the support rod, wherein the bottom of the handle is provided with a detachable battery pack, the battery pack supplies power to a driving part connected to the bottom of the support rod, a driving motor of the driving part drives a grass trimming assembly through a gear set, the driving part comprises a support bottom shell, the support bottom shell is connected to the support rod through an adjusting shaft sleeve at the movable part, the support bottom shell is movably connected to the adjusting shaft sleeve, a first cutter and a second cutter of the grass trimming assembly are nested with each other, and the first cutter and the second cutter are rotatably connected.

[0007] The second cutter comprises a limiting ring for limiting, the limiting ring is installed on the outer edge of the fixed disc and is located between the grass trimming rope of the second cutter and the saw disc, and the first cutter is axially and rotatably connected to the second cutter through an inner shaft.

[0008] As preferred, the inner shaft is matched with a lifter, the lifter controls the axial movement of the inner shaft, and the locking disc of the inner shaft is nested with the chassis of the saw disc when moving upward.

[0009] As preferred, the second cutter comprises a rotating disc, a movable column installed in the middle of the rotating disc, and a locker installed on both sides of the movable column, the rotating disc is nested with a fixed disc through a synchronous disc at the bottom and is rotationally connected, and the inner wall of the fixed disc is provided with a threading groove.

[0010] As preferred, the inner shaft is installed at the center of a driving main shaft, the center of the driving main shaft is provided with a through groove, and the diameter of the through groove is larger than the diameter of the inner shaft.

[0011] As preferred, the lifter adopts an electric turbine box structure, the output shaft of the turbine box is provided with an ejection column, and the middle part of the ejection column is provided with a bearing matched with the inner shaft.

[0012] As preferred, the driving main shaft is connected with the fixed disc of the bottom through a supporting middle shaft, and the fixed disc and the saw disc move axially along the supporting middle shaft when the inner shaft is not compressed.

[0013] As preferred, the inner shaft is matched with the inner recess of the saw disc through clamping teeth, and the fixed disc and the first cutter rotate synchronously after being embedded.

[0014] As preferred, the driving main shaft has a rod body and an input gear at the top, the connecting surface of the rod body and the rotating disc is an annular surface, and the nesting surface of the fixed disc is provided with a notch for embedding the fixed disc.

[0015] As preferred, the threading groove is in an arc groove structure, the groove bodies at both sides are located in the wall body of the fixed disc, and the groove body at the arching position of the arc groove penetrates the wall body of the fixed disc.

[0016] As preferred, the driving motor of the driving part is provided with a protective baffle at the bottom, and the wrapping range of the protective baffle is less than 1 / 2 of the grass hitting assembly. Beneficial effects

[0017] The detachable lithium battery multifunctional grass trimmer has the following effects: the limiting ring is welded at the edge of the fixed disc, the limiting ring can effectively avoid the bending caused by too close during the transverse movement, and the limiting ring can also detect some stones to avoid the collision between the grass hitting rope and the bottom surface and hard materials during the work, so as to prevent the grass hitting rope from being easily broken.

[0018] The power input to the bottom saw blade is controlled by a lifting device. The lifting device uses a motor to drive a turbine box to lift the inner shaft. The locking disc and the locking teeth are nested together, which makes the bottom saw blade work together. When cutting thin branches and leaves, the saw blade does not participate in the work and can be used as a guide wheel to assist in the cutting. Once there are thick branches that are difficult to cut, the mode is switched to make the saw blade work, which is more convenient to use. Attached Figure Description

[0019] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the structure of a detachable lithium-ion multi-functional lawn mower according to the present invention.

[0021] Figure 2 This is a cross-sectional structural diagram of the drive unit of the present invention.

[0022] Figure 3 This is a schematic diagram of the grass-cutting component of the present invention.

[0023] Figure 4 This is a cross-sectional view of the first cutter of the present invention.

[0024] Figure 5 This is a cross-sectional view of the second cutter of the present invention.

[0025] Figure 6 This is a schematic diagram of the inner shaft structure of the present invention.

[0026] Figure 7 This is a three-dimensional structural diagram of the grass-cutting component of the present invention.

[0027] Figure 8 This is a schematic diagram of the structure through which the straw rope is threaded in this invention.

[0028] In the picture:

[0029] Drive unit-10, support rod-20, grip handle-30, handle-40, battery pack-50;

[0030] Grass trimming assembly - 11, protective baffle - 12, support base shell - 13, drive motor - 14, gear set - 15, adjusting bushing - 16;

[0031] First cutter-111, second cutter-112;

[0032] Lifter-1111, Drive spindle-1112, Inner spindle-1113, Support spindle-1114, Base frame-1115, Saw blade-1116;

[0033] Turntable-1121, Moving column-1122, Locking device-1123, Synchronizing disc-1124, Fixed disc-1125, Threading groove-1126, Limit ring-1127;

[0034] Straw rope-12a, locking teeth-13a, locking disc-13b. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] To address the problems that tweezers cannot cut thick plant branches, and that using tweezers with ropes that are too tight can cause friction on the surface of the tweezers, significantly reducing their lifespan, this invention provides the following solution:

[0037] Please see Figures 1 to 8 This invention provides a detachable lithium-ion battery-powered multi-functional lawn mower technical solution: its structure includes: a support rod 20, a handle 30 mounted on the surface of the support rod 20, and a handle 40 mounted on the top of the support rod 20. A detachable battery pack 50 is provided at the bottom of the handle 40. The battery pack 50 supplies power to a drive unit 10 connected to the bottom of the support rod 20. The drive motor 14 of the drive unit 10 drives the lawn mowing assembly 11 through a gear set 15. The drive unit 10 includes a support base shell 13, which is connected to the support rod 20 through an adjusting bushing 16. The support base shell 13 and the adjusting bushing 16 are movably connected. The first cutter 111 and the second cutter 112 of the grass cutting assembly 11 are nested together and rotatably connected. The second cutter 112 includes a limiting ring 1127 for limiting. The limiting ring 1127 is installed on the outer edge of the fixed plate 1125 and is located between the grass cutting rope 12a of the second cutter 112 and the saw disc 1116. The first cutter 111 is axially and rotatably connected to the second cutter 112 through the inner shaft 1113. The bottom of the drive motor 14 of the drive unit 10 is provided with a protective baffle 12. The protective baffle 12 covers an area less than 1 / 2 of the grass cutting assembly 11.

[0038] During installation, the adjusting bushing 16 of the drive unit 10 supporting the bottom shell 13 is fitted onto the support rod 20. The adjusting bushing 16 mainly facilitates the adjustment of the angle of the first cutter 111 and the second cutter 112 of the bottom grass cutting component 11 during use, so that the hand is at a comfortable angle. The surface of the support rod 20 is equipped with a grip handle 30 for assisting the hand to hold the device, and the top handle is used for the installation of the switch and drive circuit. The entire device is powered by a battery pack 50, which uses a lithium battery pack. When the battery runs out of power during use, it can be quickly replaced.

[0039] In weeding, grass cutting rope 12a is usually used to cut tender grass leaves. During the cutting process, the gap needs to be controlled manually, otherwise the grass cutting rope 12a may directly make contact with the ground, which will lead to damage to the grass cutting rope 12a.

[0040] In response to the above issues, this case will be handled with the following solutions:

[0041] The second cutter 112 in this case is mainly used for processing soft branches, leaves, and grass. The second cutter 112, as... Figure 5 The second cutter 112 includes a turntable 1121, a movable column 1122 installed in the middle of the turntable 1121, the movable column 1122 supporting the rotation of the turntable 1121, and locking devices 1123 installed on both sides of the movable column 1122 for limiting the turntable 1121. The locking devices 1123 are symmetrically arranged to prevent excessive shift of the center of gravity and swaying. The turntable 1121 is nested with a fixed plate 1125 at the bottom via a synchronous plate 1124. The inner wall of the fixed plate 1125 is provided with a wire-passing groove 1126. The wire-passing groove 1126 has an arc-shaped groove structure. The grooves on both sides are located in the wall of the fixed plate 1125. The groove located at the arch of the arc-shaped groove penetrates the wall of the fixed plate 1125. The wire-passing groove 1126 is used to install the straw rope 12a. The straw rope a passes through the wire-passing groove 1126 as follows. Figure 8 An annular groove is provided on the surface of the timing disc 1124. A rubber pad is installed inside the groove. During insertion, the timing disc 1124 is rotated to squeeze the straw rope 12a in for quick installation. After installation, the straw rope 12a is locked to the surface of the drive spindle 1112 by the fixing bolts inside the locking devices 1123 on both sides, so that the straw rope 12a can be replaced without disassembly.

[0042] To prevent the mowing rope 12a from colliding with the bottom surface and hard materials during operation, which could cause it to break easily, a limiting ring 1127 is welded to the edge of the fixed plate 1125. The limiting ring 1127 can effectively prevent bending caused by getting too close during lateral movement, and can also be used to detect some stones.

[0043] To further improve the cutting strength, a first cutter 111 is installed at the bottom of the second cutter 112. The first cutter 111 cuts through the saw disc 1116 at the bottom, and cuts some thick branches that are difficult to handle for straw rope 112a.

[0044] The saw disc 1116 is driven by the bearing wheel of the top support shaft 1114 and the drive shaft 1112 of the top power input. The power input is controlled by the lifting device 1111. The lifting device 1111 uses a motor to drive the turbine box to lift the inner shaft 1113. The inner shaft 1113 is then nested with the locking disc 13b and the engaging teeth 13a, thereby enabling the saw disc 1116 at the bottom to move in tandem.

[0045] The lifting device 1111 is controlled by the function buttons on the handle 30 to switch the working mode of the saw disc 1116. The button controlling the lifting device 1111 is linked to the main switch circuit. The motor inside the lifting device 111 can only be driven after the power to the drive motor 14 is disconnected, so as to avoid the locking teeth 13a from slipping out. The locking pin 13a is mainly nested with the inner groove of the saw disc 1116. When the saw blade 1116 reaches the end of its service life, it is replaced to avoid the problem of tooth slippage caused by long-term operation.

[0046] When the saw disc 1116 is not in operation, the power unit is cut by the support shaft 1114, and the saw disc 1116 can roll freely. In some edge trimming operations, the saw disc 1116 can be used as a roller to control the gap with the ground and roll along the cut edge, which is more convenient during the process.

[0047] By welding a limiting ring 1127 to the edge of the fixed plate 1125, the limiting ring 1127 can effectively prevent bending caused by getting too close during lateral movement. At the same time, the limiting ring 1127 can detect some stones to prevent the straw rope 12a from colliding with the bottom surface and hard materials too close during operation, which would easily cause the straw rope 12a to break.

[0048] The power input of the saw disc 1116 at the bottom is controlled by the lifting device 1111. The lifting device 1111 uses a motor to drive the turbine box to lift and lower the inner shaft 1113. The inner shaft 1113 is then engaged by the locking disc 13b and the engaging teeth 13a, thereby enabling the saw disc 1116 at the bottom to work together. When cutting thin branches and leaves, the saw disc 1116 does not participate in the work and can be used as a guide wheel to assist in the cutting. Once there are thick branches that are difficult to cut, the mode is switched to enable the saw disc 1116 to work, making it more convenient to use.

[0049] The above description only outlines the basic principles and preferred embodiments of the present invention. Those skilled in the art can make many changes and modifications based on the above description, and these changes and modifications should fall within the protection scope of the present invention.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A detachable lithium battery multifunctional grass trimmer, comprising: Supporting rod (20), the handle (30) installed on the surface of the supporting rod (20), and the handle (40) installed on the top of the supporting rod (20), the bottom of the handle (40) is provided with a detachable battery pack (50), the battery pack (50) is used for power supply of the driving part (10) connected to the bottom of the supporting rod (20), and the driving part (10) is characterized by: The driving motor (14) of the driving part (10) drives the grass cutting assembly (11) through the gear set (15), the driving part (10) includes a supporting bottom shell (13), the supporting bottom shell (13) is connected with the supporting rod (20) through the adjusting shaft sleeve (16) at the movable position, the supporting bottom shell (13) is movably connected with the adjusting shaft sleeve (16), the first cutter (111) and the second cutter (112) of the grass cutting assembly (11) are nested with each other, and the first cutter (111) is rotatably connected with the second cutter (112); The second cutter (112) includes a limiting ring (1127) for limiting, the limiting ring (1127) is installed on the outer edge of the fixed disc (1125) and is located between the grass rope (12a) of the second cutter (112) and the saw disc (1116), the first cutter (111) is axially and rotatably connected with the second cutter (112) through the inner shaft (1113); The inner shaft (1113) cooperates with the lifter (1111), the lifter (1111) controls the axial movement of the inner shaft (1113), and the lock disc (13b) of the inner shaft (1113) is nested with the bottom frame (1115) of the saw disc (1116) when the lock disc (13b) moves upward; The second cutter (112) includes a rotating disc (1121), a movable column (1122) installed in the middle of the rotating disc (1121), and a lock (1123) installed on both sides of the movable column (1122), the rotating disc (1121) is nested with the fixed disc (1125) through the synchronous disc (1124) at the bottom and is rotatably connected, and the inner wall of the fixed disc (1125) is provided with a threading groove (1126).

2. The detachable lithium battery multifunctional grass trimmer according to claim 1, characterized in that: The inner shaft (1113) is installed in the center of the driving main shaft (1112), the center of the driving main shaft (1112) is provided with a through groove, and the diameter of the through groove is greater than the diameter of the inner shaft (1113).

3. The detachable lithium battery powered multi-functional grass trimmer of claim 1, wherein: The lifter (1111) adopts an electric turbine box structure, the output shaft of the turbine box is provided with an ejection column, and the middle of the ejection column is provided with a bearing cooperating with the inner shaft (1113).

4. The detachable lithium battery powered multi-functional grass trimmer of claim 2, wherein: The driving main shaft (1112) is connected with the fixed disc (1125) at the bottom through the supporting central shaft (1114), and in the case that the inner shaft (1113) is not compressed, the fixed disc (1125) and the saw disc (1116) move axially along the supporting central shaft (1114).

5. The detachable lithium battery powered multi-functional grass trimmer of claim 3, wherein: The inner shaft (1113) cooperates with the inner recess of the saw disc (1116) through the clamping teeth (13a), and after embedding, the fixed disc (1125) and the first cutter (111) rotate synchronously.

6. The detachable lithium battery powered multi-functional grass trimmer of claim 4, wherein: The driving main shaft (1112) has an input gear of a rod body and a top, and the connecting surface of the rod body and the rotating disc (1121) is an annular surface, and the nesting surface of the fixed disc (1125) is provided with a notch and is embedded with the fixed disc (1125).

7. The detachable lithium battery powered multi-functional grass trimmer of claim 1, wherein: The threading groove (1126) is in an arc groove structure, the groove bodies on both sides are located in the wall body of the fixed disc (1125), and the groove body located at the arching position of the arc groove penetrates the wall body of the fixed disc (1125).

8. The detachable lithium battery powered multi-functional grass trimmer of claim 1, wherein: The bottom of the driving motor (14) of the driving part (10) is provided with a protective baffle (12), and the wrapping range of the protective baffle (12) is less than 1 / 2 of the grass hitting assembly (11).

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