Portable brush cutter

Abstract

The utility model discloses a portable brush cutter, which relates to the technical field of brush cutters and comprises a handheld shell and a driving shell, a first inner insertion tube, a double-end insertion tube and a second inner insertion tube are connected between the handheld shell and the driving shell in an inserted mode, and U-shaped bolts are connected between every two adjacent first inner insertion tube, the double-end insertion tube and the second inner insertion tube in an inserted mode. A knob nut is fixed to one end of the U-shaped bolt in a threaded mode, a motor is fixedly installed in the driving shell, a battery pack is externally inserted into the power socket, a push button type self-locking switch is fixedly installed on the surface of the top end of the handheld shell, the output end of the motor is fixedly connected with an output shaft, and the output shaft is sleeved with a bearing. The end, located outside the limiting shell, of the output shaft is sequentially sleeved with a first tool bit, a second tool bit and a third tool bit which are suitable for various environments in a limiting mode, the end, away from the second inner insertion pipe, of the driving shell is connected with a rotatable tool protection steel wire, and the effects of being small in size, light in weight, easy to use and capable of greatly reducing fatigue during working are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of brush cutters, in particular to a portable brush cutter. Background Technique

[0002] A brush cutter is also called a lawn mower, a weeding machine, a grass trimming machine, a lawn trimmer, etc. A lawn mower is a mechanical tool for trimming lawns, vegetation, etc. It is composed of a cutter head, an engine, walking wheels, a walking mechanism, blades, a handrail, and a control part.

[0003] At present, most brush cutters are too bulky and inconvenient to carry. When cutting weeds on both sides of the road, shrubs in various environments such as orchards, hillsides or uneven places, their applicability is not strong. In addition, the switches of most brush cutters are push-button switches, which are prone to accidental touch. Moreover, most brush cutters are powered by charging to provide power support, which will limit the operation time of the brush cutter, thus reducing the practicality of the brush cutter. Summary of the Invention

[0004] The purpose of the utility model is to provide a portable brush cutter, which solves the technical problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A portable brush cutter, including a hand-held housing and a drive housing, a first inner insertion tube, a double-headed insertion tube and a second inner insertion tube are inserted and connected between the hand-held housing and the drive housing. U-shaped bolts are inserted between every two adjacent ones of the first inner insertion tube, the double-headed insertion tube and the second inner insertion tube. One end of the U-shaped bolt is fixed with a knob nut by threading. The first inner insertion tube, the double-headed insertion tube and the second inner insertion tube are all made of aluminum pipes;

[0006] A motor is fixedly installed inside the drive housing. A power socket for supplying power to the motor is fixedly installed and connected to the lower surface of the hand-held housing. A battery pack is externally inserted on the power socket. A push-button self-locking switch is fixedly installed on the top surface of the hand-held housing. The lower surface of the drive housing is rotationally connected with a limit housing in a limited manner. The output end of the motor is fixedly connected with an output shaft. A bearing is sleeved outside the output shaft. The bearing is limitedly installed inside the limit housing, and the output shaft penetrates to the outside of the limit housing. One end of the output shaft outside the limit housing is sequentially sleeved with a first cutter head, a second cutter head and a third cutter head suitable for various environments. A rotatable cutter guard wire is connected to one end of the drive housing away from the second inner insertion tube.

[0007] Optionally, one end of the first inner tube is inserted into the inside of the hand-held shell, and one end of the second inner tube is inserted into the inside of the drive shell, and the first inner tube and the second inner tube are respectively threadedly fixedly connected to the hand-held shell and the drive shell with a first bolt, and both ends of the double-headed tube are respectively inserted into the outside of the first inner tube and the second inner tube, and the three sections formed by the first inner tube and the hand-held shell, the double-headed tube, and the second inner tube and the drive shell are only about 50 cm in length when folded.

[0008] Optionally, the handle housing and the drive housing are both firmly connected by two opposite half shells, and a plurality of second bolts are respectively threadedly fixedly connected between the half shells of the handle housing and the drive housing.

[0009] Optionally, one side surface of the first inner tube, the double-headed tube and the second inner tube is correspondingly provided with two slot holes for inserting the U-shaped bolt, and the other side surface of the first inner tube, the double-headed tube and the second inner tube is correspondingly provided with a positioning slot hole for inserting one end of the U-shaped bolt and fixed by the knob nut thread.

[0010] Optionally, a speed adjustment button is fixedly mounted on the inner surface of one side of the hand-held shell.

[0011] Optionally, the first cutter head is specifically a disc gear cutter head, the second cutter head is specifically a straight-line cutter head, and the third cutter head is specifically a straight-line cutter head with teeth on both sides. A group of symmetrical limiting protrusions are fixedly connected to both sides of the lower surface of the limiting shell, and the second cutter head and the third cutter head are limitedly clamped between the limiting protrusions. The surface of the first cutter head is penetrated by an insertion slot for inserting the limiting protrusion.

[0012] Optionally, the output shaft outer shell is connected with a limiting gasket that fits the lower surface of the third cutter head, and the lower surface of the limiting gasket is pressed and fitted with a nut sleeve, and the nut sleeve is threadedly fixed to the outer surface of the output shaft.

[0013] Optionally, one end of the drive housing away from the knife guard wire is fixedly mounted and connected to a rear stop housing.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The utility model adopts a first inner insertion tube, a double - headed insertion tube, and a second inner insertion tube that are inserted and connected between the hand - held housing and the drive housing. The three - section design of the first inner insertion tube, the double - headed insertion tube, and the second inner insertion tube effectively facilitates use while also being convenient for carrying and storage. After folding it up, the length is only about 50 cm, and it can be easily placed in the trunk of a car. Moreover, the aluminum pipes selected for the first inner insertion tube, the double - headed insertion tube, and the second inner insertion tube can greatly reduce the weight of the overall brush cutter, making the usage requirements of this brush cutter lower and the applicable population wider. In addition, the connection parts between the first inner insertion tube, the double - headed insertion tube, and the second inner insertion tube are firmly fixed with U - shaped bolts + nuts, making the three sections like one section, without shaking and without gaps, reassuring the user.

[0016] 2. The utility model uses a push - button self - locking switch designed on the hand - held housing, effectively reducing the risk of accidental touch and opening, being convenient for users to operate while ensuring safety.

[0017] 3. The power part of the utility model is designed as an external battery pack, enabling users to freely replace the battery pack at a power socket when there is no power, increasing the working time of the machine and improving the practical effect of use.

[0018] 4. Through the design at the drive housing, the brush cutter has a powerful 10000 - rpm motor. Coupled with the supporting first cutter head, second cutter head, and third cutter head, it can adapt to the vast majority of environments. Among them, the first cutter head can trim soft grass or shrubs, the second cutter head can trim hard lawns or thorns. If encountering a lawn with a poor working environment full of stones and other debris, the third cutter head can be used for trimming, thereby improving the applicability of the brush cutter in multiple environments.

[0019] In addition, when the front guard knife wire is lowered, it can ensure that the blade is not damaged when cutting grass near the wall, and when lifted, it can work quickly in messy bushes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the front view of the structure of the utility model;

[0021] Figure 2 is the enlarged schematic of part of the structure in the utility model Figure 1 ;

[0022] Figure 3 is the enlarged schematic of part of the structure in the utility model Figure 2 ;

[0023] Figure 4 is the cross - section of part of the structure in the utility model Figure 1 ;

[0024] Figure 5 This is an enlarged schematic diagram of some structures in the utility model. Figure 3 ;

[0025] Figure 6 This is a cross section of some structures in the utility model Figure 2 ;

[0026] Figure 7 For this utility model Figure 6 A magnified schematic diagram of the structure at center A;

[0027] Figure 8 This is an enlarged schematic diagram of some structures in the utility model. Figure 4 .

[0028] In the figure: 1-hand grip housing, 2-drive housing, 3-first inner insert, 4-double-head insert, 5-second inner insert, 6-first bolt, 7-second bolt, 8-two slot holes, 9-positioning slot, 10-U-bolt, 11-knob nut, 12-power socket, 13-battery pack, 14-push button self-locking switch, 15-speed control button, 16-motor, 17-limit housing, 18-output shaft, 19-bearing, 20-first blade head, 21-second blade head, 22-third blade head, 23-limit gasket, 24-nut sleeve, 25-limit protrusion, 26-insertion notch, 27-rear block housing, 28-blade guard wire. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Example 1, please refer to Figures 1 to 8The utility model provides a portable brush cutter, comprising a hand-held shell 1 and a driving shell 2, wherein a first inner tube 3, a double-ended tube 4 and a second inner tube 5 are plugged and connected between the hand-held shell 1 and the driving shell 2, a U-shaped bolt 10 is plugged between the first inner tube 3, the double-ended tube 4 and the second inner tube 5, and one end of the U-shaped bolt 10 is threadedly fixed with a knob nut 11, and the first inner tube 3, the double-ended tube 4 and the second inner tube 5 are all made of aluminum pipes. The three sections formed by the first inner tube 3, the hand-held shell 1, the double-ended tube 4, and the second inner tube 5 and the driving shell 2 are only about 50 cm long after being folded, and two slot holes 8 for inserting the U-shaped bolt 10 are correspondingly opened on one side surface of the first inner tube 3, the double-ended tube 4 and the second inner tube 5, and a positioning slot 9 for inserting one end of the U-shaped bolt 10 and threadedly fixed by the knob nut 11 is correspondingly opened on the other side surface of the first inner tube 3, the double-ended tube 4 and the second inner tube 5;

[0031] A motor 16 is fixedly installed inside the driving shell 2, and a power socket 12 for providing power to the motor 16 is fixedly installed on the lower surface of the hand-held shell 1, and a battery pack 13 is externally plugged into the power socket 12. A push-button self-locking switch 14 is fixedly installed on the top surface of the hand-held shell 1, and a speed adjustment button 15 is fixedly installed on the inner surface of one side of the hand-held shell 1. The lower surface of the driving shell 2 is limitedly rotatably connected to a limit shell 17, and an output end of the motor 16 is fixedly connected to an output shaft 18, and a bearing 19 is sleeved on the outside of the output shaft 18. The bearing 19 is limitedly installed inside the limit shell 17, and the output shaft 18 passes through the outside of the limit shell 17. The output shaft 18 is located at the outer end of the limit shell 17, and the first blade head 20, the second blade head 21 and the third blade head 22 suitable for various environments are sequentially limitedly sleeved, and the end of the driving shell 2 away from the second inner tube 5 is connected to a rotatable knife guard wire 28.

[0032] One end of the driving housing 2 away from the knife guard wire 28 is fixedly mounted and connected with a rear stop housing 27 .

[0033] More specifically, in this embodiment, the push-button self-locking switch 14 designed on the hand-held housing 1 effectively reduces the risk of accidental opening, ensuring safety while facilitating user operation; and the power supply part is designed as an external battery pack 13, so that the user can freely replace the battery pack 13 at the power socket 12 when there is no power, thereby increasing the working time of the machine and improving the practicality of use.

[0034] The three - section design of the first inner tube 3, the double - headed tube 4, and the second inner tube 5 effectively makes it convenient to use, carry, and store. After folding it up, the length is only about 50 cm, and it can be easily put into the trunk of a car. Moreover, the aluminum pipes selected for the first inner tube 3, the double - headed tube 4, and the second inner tube 5 can greatly reduce the weight of the overall brush cutter, making the usage requirements of this brush cutter lower and the applicable population wider. In addition, the connection parts between the first inner tube 3, the double - headed tube 4, and the second inner tube 5 are fixed firmly with a U - shaped bolt 10 + a knob nut 11, making the three sections like one section, without shaking and without gaps, reassuring the user. Specifically, after the adjacent first inner tube 3, double - headed tube 4, and second inner tube 5 are inserted, the U - shaped bolt 10 is inserted into the two slot holes 8 of the adjacent two first inner tube 3, double - headed tube 4, and second inner tube 5, and one end of the U - shaped bolt 10 protrudes from the positioning slot hole 9, and then is positioned and stabilized by the knob nut 11.

[0035] During use, push the push - button self - locking switch 14 to start the motor 16, press the speed - regulating button 15 to adjust the speed of the motor 16. The output end of the motor 16 drives the output shaft 18 and the limit housing 17 to rotate synchronously. The output shaft 18 also drives the first cutter head 20, the second cutter head 21, and the third cutter head 22 to rotate for brush cutting. Through the use of the motor 16, the brush cutter has the powerful force of a machine with a speed of 10,000 revolutions per minute. Coupled with the supporting first cutter head 20, second cutter head 21, and third cutter head 22, it can adapt to most environments. Among them, the first cutter head 20 can trim soft grass or shrubs, the second cutter head 21 can trim hard lawns or thorns. If encountering a lawn with a poor working environment full of stones and other sundries, the third cutter head 22 can be used for trimming, thereby improving the applicability of the brush cutter in multiple environments.

[0036] In addition, when the front guard - knife wire 28 is lowered, it can ensure that the blade is not damaged when cutting grass along the wall. When lifted, it can work quickly in the messy bushes, and the rear guard housing 27 can block the splashing shrubs.

[0037] Furthermore, one end of the first inner tube 3 is inserted into the inside of the hand - held housing 1, one end of the second inner tube 5 is inserted into the inside of the drive housing 2, and the first inner tube 3 and the second inner tube 5 are respectively thread - fixedly connected to the hand - held housing 1 and the drive housing 2 with first bolts 6. The two ends of the double - headed tube 4 are respectively inserted outside the first inner tube 3 and the second inner tube 5. The hand - held housing 1 and the drive housing 2 are both connected and stabilized by two opposite half - housings, and several second bolts 7 are respectively thread - fixedly connected between the half - housings of the hand - held housing 1 and the drive housing 2.

[0038] It should be noted that the first inner insertion tube 3 and the second inner insertion tube 5 can be respectively inserted into the interior of the hand-held housing 1 and the drive housing 2, and are threadedly fixed by the first bolt 6. Moreover, the hand-held housing 1 and the drive housing 2 can be disassembled by the second bolt 7 for thread removal, and the internal equipment can be overhauled.

[0039] Embodiment 2, on the basis of the above embodiment:

[0040] Furthermore, the first cutter head 20 is specifically a disc gear cutter head, the second cutter head 21 is specifically a flat head cutter head, the third cutter head 22 is specifically a flat head cutter head with teeth on both sides. A group of symmetric limiting bumps 25 are fixedly connected to both sides of the lower surface of the limiting housing 17. The second cutter head 21 and the third cutter head 22 are limited and clamped between the limiting bumps 25. An insertion notch 26 for inserting the limiting bumps 25 is penetrated on the surface of the first cutter head 20. A limiting gasket 23 that fits against the lower surface of the third cutter head 22 is sleeved outside the output shaft 18, and a nut sleeve 24 is pressed against the lower surface of the limiting gasket 23. The nut sleeve 24 is threadedly connected and fixed to the outer surface of the output shaft 18.

[0041] More specifically, in this embodiment, when the first cutter head 20, the second cutter head 21, and the third cutter head 22 are sequentially sleeved outside the output shaft, the second cutter head 21 and the third cutter head 22 are placed and clamped between the limiting bumps 25 of the limiting housing 17, and the insertion notch 26 of the first cutter head 20 is inserted and clamped outside the limiting bumps 25. Subsequently, the limiting gasket 23 is sleeved outside the output shaft 18 and fits against the lower surface of the third cutter head 22. Finally, the nut sleeve 24 is threadedly sleeved outside the output shaft 18 for fixation.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable brush cutter, comprising a hand-held housing (1) and a drive housing (2), characterized in that: A first inner insertion tube (3), a double-headed insertion tube (4) and a second inner insertion tube (5) are inserted and connected between the hand-held housing (1) and the drive housing (2). U-shaped bolts (10) are inserted between every two adjacent ones of the first inner insertion tube (3), the double-headed insertion tube (4) and the second inner insertion tube (5). One end of the U-shaped bolt (10) is fixedly threaded with a knob nut (11). The first inner insertion tube (3), the double-headed insertion tube (4) and the second inner insertion tube (5) are all made of aluminum pipes; A motor (16) is fixedly installed inside the drive housing (2). A power socket (12) for supplying power to the motor (16) is fixedly installed and connected to the lower surface of the hand-held housing (1). A battery pack (13) is externally inserted on the power socket (12). A push-button self-locking switch (14) is fixedly installed on the top surface of the hand-held housing (1). A limit housing (17) is rotationally connected in a limited manner to the lower surface of the drive housing (2). The output end of the motor (16) is fixedly connected with an output shaft (18). A bearing (19) is sleeved outside the output shaft (18). The bearing (19) is installed in the limit housing (17) in a limited manner, and the output shaft (18) penetrates to the outside of the limit housing (17). A first cutter head (20), a second cutter head (21) and a third cutter head (22) suitable for various environments are sequentially sleeved in a limited manner at one end of the output shaft (18) outside the limit housing (17). One end of the drive housing (2) away from the second inner insertion tube (5) is connected with a rotatable cutter guard wire (28).

2. A portable brush cutter according to claim 1, characterized in that: One end of the first inner insertion tube (3) is inserted into the hand-held housing (1). One end of the second inner insertion tube (5) is inserted into the drive housing (2). First bolts (6) are fixedly threaded between the first inner insertion tube (3) and the second inner insertion tube (5) and the hand-held housing (1) and the drive housing (2) respectively. Both ends of the double-headed insertion tube (4) are inserted outside the first inner insertion tube (3) and the second inner insertion tube (5). The lengths of the three sections formed by the first inner insertion tube (3) and the hand-held housing (1), the double-headed insertion tube (4), and the second inner insertion tube (5) and the drive housing (2) are only about 50 cm after being folded up.

3. A portable brush cutter according to claim 2, characterized in that: Both the hand-held housing (1) and the drive housing (2) are firmly connected by two opposite half-housings. A number of second bolts (7) are fixedly threaded between the half-housings of the hand-held housing (1) and the drive housing (2) respectively.

4. A portable brush cutter according to claim 1, characterized in that: Two slot holes (8) for inserting the U-shaped bolt (10) are correspondingly opened on one side surface of the first inner insertion tube (3), the double-headed insertion tube (4) and the second inner insertion tube (5). A positioning slot hole (9) for inserting one end of the U-shaped bolt (10) and being fixedly threaded with the knob nut (11) is correspondingly opened on the other side surface of the first inner insertion tube (3), the double-headed insertion tube (4) and the second inner insertion tube (5).

5. A portable brush cutter according to claim 1, characterized in that: A speed regulating button (15) is fixedly mounted on the inner surface of one side of the hand-held housing (1).

6. A portable brush cutter according to claim 1, characterized in that: The first cutter head (20) is specifically a disc gear cutter head, the second cutter head (21) is specifically a straight cutter head, and the third cutter head (22) is specifically a straight cutter head with teeth on both sides. A group of symmetrical limiting protrusions (25) are fixedly connected to both sides of the lower surface of the limiting shell (17), the second cutter head (21) and the third cutter head (22) are limitedly clamped between the limiting protrusions (25), and the surface of the first cutter head (20) is penetrated by an insertion slot (26) for inserting the limiting protrusion (25).

7. A portable brush cutter according to claim 6, characterized in that: The output shaft (18) is outer-mounted with a limiting gasket (23) which is fitted to the lower surface of the third cutter head (22), and the lower surface of the limiting gasket (23) is fitted and pressed with a nut sleeve (24), and the nut sleeve (24) is threadedly connected and fixed to the outer surface of the output shaft (18).

8. A portable brush cutter according to claim 1, characterized in that: One end of the drive housing (2) away from the knife guard wire (28) is fixedly mounted and connected to a rear stop housing (27).

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