Brushless motor rotating structure for grass trimmer

Abstract

The utility model discloses a brushless motor rotation structure for a grass trimmer, which relates to the technical field of grass trimmers and comprises a first protective shell, a bidirectional brushless motor is fixedly sleeved on the inner side of the first protective shell, and a heat dissipation mechanism is fixedly connected to the output end of the upper side of the bidirectional brushless motor. The output end of the lower side of the heat dissipation mechanism is fixedly connected with a transmission sleeve, the lower side of the first protective shell is fixedly connected with a fixing sleeve, the transmission sleeve is located on the inner side of the fixing sleeve, the inner side of the fixing sleeve is movably sleeved with a grass mowing mechanism, and the heat dissipation mechanism comprises a rotating seat; and the lower side of the rotating seat is fixedly connected to the output end of the upper side of the bidirectional brushless motor. According to the brushless motor rotating structure for the grass trimmer, grass clippings attached to the inner side of the protective cover are quickly cleaned by pushing the scraper blade, the time consumed for frequently cleaning the protective cover in the working process is greatly shortened, the working efficiency is improved, the operation is simple, and the cleaning is quick.

Description

Technical Field

[0001] The utility model relates to the technical field of grass trimmers, in particular to a brushless motor rotating structure for grass trimmers. Background Art

[0002] A lawn mower is a handheld tool used to cut weeds in lawns, gardens, pastures, etc. According to the power source, lawn mowers can be divided into two types: oil-powered and electric. In addition, according to the structure of the power head, lawn mowers can be divided into two types: front-powered and rear-powered.

[0003] Chinese patent document CN104770142B discloses a grass trimmer, comprising a body, a working head with a grass trimming function fixed to one end of the body, and a protective cover detachably connected to the working head, wherein the working head is provided with a connecting head, the protective cover is provided with a connecting groove capable of cooperating with the connecting head, the connecting head is detachably inserted into the connecting groove, an elastic member capable of providing an elastic restoring force in a direction perpendicular to the extension direction of the connecting groove is fixedly provided on the side wall of the connecting groove, and when the connecting head is inserted into the connecting groove, the elastic member presses the connecting head in the direction of its elastic restoring force; the user can complete the installation of the protective cover and the working head without any tools, which not only reduces the burden on the user but also eliminates safety hazards.

[0004] The existing technology has the following problems:

[0005] The guard on the working head at the lower side of the mower is used to shield grass clippings generated when the working head is working to prevent the grass clippings from splashing to the rear side. However, these grass clippings will adhere to the inner side of the guard. When working for a long time, the amount of grass clippings increases and is difficult to clean. Utility Model Content

[0006] The utility model provides a brushless motor rotating structure for a grass trimmer to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A brushless motor rotating structure for a lawn mower comprises a first protective shell, a bidirectional brushless motor is fixedly sleeved on the inner side of the first protective shell, an upper output end of the bidirectional brushless motor is fixedly connected to a heat dissipation mechanism, a lower output end of the heat dissipation mechanism is fixedly connected to a transmission sleeve, a lower side of the first protective shell is fixedly connected to a fixed sleeve, and the transmission sleeve is located on the inner side of the fixed sleeve, and a lawn mowing mechanism is movably sleeved on the inner side of the fixed sleeve.

[0009] Preferably, the heat dissipation mechanism includes a rotating seat, the lower side of the rotating seat is fixedly connected to the output end on the upper side of the bidirectional brushless motor, the outer side of the rotating seat is movably sleeved with a heat dissipation fan, the upper side of the first protective shell is fixedly connected to the second protective shell by a first screw, and the heat dissipation fan is located on the inner side of the second protective shell.

[0010] Preferably, the grass cutting mechanism includes a fixed seat, a grass cutting component is movably mounted on the outer side of the fixed seat, a transmission seat is fixedly connected to the upper side of the grass cutting component, the outer side of the fixed seat is movably sleeved on the inner side of the fixed sleeve, and the outer side of the transmission seat is movably sleeved on the inner side of the transmission sleeve.

[0011] Preferably, a protective cover is fixedly connected to the lower side of the fixing seat, and the grass cutting component is located on the inner side of the protective cover.

[0012] Preferably, a scraper is rotatably connected to the lower side of the fixing seat, and the side wall of the protective cover is movably sleeved at a position between the inner and outer walls of the scraper.

[0013] Preferably, a rubber pad is fixedly connected to a side of the inner wall of the scraper away from the grass trimming component, and the side of the rubber pad away from the grass trimming component is in close contact with the inner side surface of the protective cover.

[0014] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0015] 1. The utility model provides a brushless motor rotating structure for a grass trimmer, which adopts the cooperation of a grass trimming mechanism, a fixed seat, a grass trimming assembly, a rotating seat, a protective cover, a scraper and a rubber pad. By pushing the scraper, grass clippings attached to the inner side of the protective cover are quickly cleaned, which greatly shortens the time consumed by frequently cleaning the protective cover during work, improves work efficiency, is simple to operate, and is quick to clean.

[0016] 2. The utility model provides a brushless motor rotating structure for a lawn mower, which adopts a bidirectional brushless motor, a heat dissipation mechanism, a rotating seat, a heat dissipation fan and a second protective shell. The heat dissipation fan is driven by the bidirectional brushless motor to rotate, so that the heat generated by the bidirectional brushless motor when working is carried out by the air, thereby extending the continuous working time of the bidirectional brushless motor and extending the service life of the bidirectional brushless motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the first protective shell part of the utility model;

[0019] Figure 3 It is a partial cross-sectional three-dimensional structural schematic diagram of the first protective shell portion of the utility model;

[0020] Figure 4 It is a schematic diagram of the exploded three-dimensional structure of the heat dissipation mechanism of the utility model;

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the grass cutting mechanism of the utility model.

[0022] In the figure: 1. first protective shell; 2. bidirectional brushless motor; 3. heat dissipation mechanism; 31. rotating seat; 32. heat dissipation fan; 33. second protective shell; 4. transmission sleeve; 5. fixed sleeve; 6. grass cutting mechanism; 61. fixed seat; 62. grass cutting component; 63. transmission seat; 64. protective cover; 65. scraper; 66. rubber pad. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1 , Figure 3 As shown, a brushless motor rotating structure for a lawn mower comprises a first protective shell 1, a bidirectional brushless motor 2 is fixedly sleeved on the inner side of the first protective shell 1, a heat dissipation mechanism 3 is fixedly connected to the output end of the upper side of the bidirectional brushless motor 2, a transmission sleeve 4 is fixedly connected to the output end of the lower side of the heat dissipation mechanism 3, a fixed sleeve 5 is fixedly connected to the lower side of the first protective shell 1, and the transmission sleeve 4 is located on the inner side of the fixed sleeve 5, and a grass trimming mechanism 6 is movably sleeved on the inner side of the fixed sleeve 5.

[0025] It should be noted that the output end at the lower side of the bidirectional brushless motor 2 indirectly drives the transmission sleeve 4 to rotate in the form of a pulley and a transmission track to reduce production costs.

[0026] like Figure 3 , Figure 4 As shown, the heat dissipation mechanism 3 includes a rotating seat 31, the lower side of the rotating seat 31 is fixedly connected to the output end on the upper side of the bidirectional brushless motor 2, the outer side of the rotating seat 31 is movably sleeved with a heat dissipation fan 32, the upper side of the first protective shell 1 is fixedly connected to the second protective shell 33 by a first screw, and the heat dissipation fan 32 is located on the inner side of the second protective shell 33.

[0027] It should be noted that the bidirectional brushless motor 2 drives the rotating seat 31 to rotate, and the rotating seat 31 drives the cooling fan 32 to rotate. When the cooling fan 32 rotates, the air flow on the upper side of the bidirectional brushless motor 2 is accelerated, thereby reducing the temperature generated by the bidirectional brushless motor 2 when working.

[0028] like Figure 3 , Figure 5As shown, the grass cutting mechanism 6 includes a fixed seat 61, a grass cutting component 62 is movably installed on the outer side of the fixed seat 61, a transmission seat 63 is fixedly connected to the upper side of the grass cutting component 62, the outer side of the fixed seat 61 is movably sleeved on the inner side of the fixed sleeve 5, and the outer side of the transmission seat 63 is movably sleeved on the inner side of the transmission sleeve 4.

[0029] It should be noted that the transmission sleeve 4 drives the transmission seat 63 to rotate, and the transmission seat 63 drives the inside of the grass cutting component 62. The specific structural shape of the grass cutting component 62 is designed in the form of front power or rear power according to specific needs. The fixed seat 61 and the fixed sleeve 5 are fixed together with a second screw to prevent the fixed seat 61 from rotating when the transmission seat 63 rotates.

[0030] like Figure 5 As shown, a protective cover 64 is fixedly connected to the lower side of the fixing seat 61 , and the grass cutting component 62 is located on the inner side of the protective cover 64 .

[0031] It should be noted that the protective cover 64 is used to shield grass clippings generated when the grass trimming component 62 is working to prevent the grass clippings from splashing to the rear side. The protective cover 64 is in the shape of a cylindrical shell with an opening on the front side.

[0032] like Figure 5 As shown, a scraper 65 is rotatably connected to the lower side of the fixing seat 61 , and the side wall of the protective cover 64 is movably sleeved at a position between the inner and outer walls of the scraper 65 .

[0033] It should be noted that a handle is fixedly connected to the upper rear side of the scraper 65 , and pulling the handle drives the scraper 65 to rotate, so that the grass clippings inside the protective cover 64 are removed.

[0034] like Figure 5 As shown, a rubber pad 66 is fixedly connected to the inner wall of the scraper 65 at a side away from the grass trimming component 62 , and the rubber pad 66 is in close contact with the inner side surface of the protective cover 64 at a side away from the grass trimming component 62 .

[0035] It should be noted that the rubber pad 66 is used to fill the gap between the scraper 65 and the inner side of the protective cover 64 to prevent the scraper 65 from being unable to completely remove grass clippings.

[0036] The working principle of the utility model is as follows: first, the protective cover 64 is used to shield the grass clippings generated when the grass cutting component 62 is working, so as to prevent the grass clippings from splashing to the rear side. The shape of the protective cover 64 is a cylindrical shell with an opening on the front side. The upper rear side of the scraper 65 is fixedly connected with a handle. Pulling the handle drives the scraper 65 to rotate, so that the grass clippings inside the protective cover 64 are cleared. The rubber pad 66 is used to fill the gap between the scraper 65 and the inner side of the protective cover 64 to prevent the scraper 65 from being unable to completely clear the grass clippings. By pushing the scraper 65, the grass clippings attached to the inner side of the protective cover 64 are quickly cleaned, which greatly shortens the working time. The time consumed in frequently cleaning the protective cover 64 is improved, the operation is simple, and the cleaning is quick. Then, the bidirectional brushless motor 2 drives the rotating seat 31 to rotate, and the rotating seat 31 drives the cooling fan 32 to rotate when rotating. When the cooling fan 32 rotates, the air flow on the upper side of the bidirectional brushless motor 2 is accelerated, thereby reducing the temperature generated by the bidirectional brushless motor 2 when working. The bidirectional brushless motor 2 drives the cooling fan 32 to rotate, so that the heat generated by the bidirectional brushless motor 2 when working is carried out by the air, thereby extending the continuous working time of the bidirectional brushless motor 2 and extending the service life of the bidirectional brushless motor 2.

[0037] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A brushless motor rotating structure for a grass trimmer, comprising a first protective housing (1), characterized in that: A bidirectional brushless motor (2) is fixedly sleeved on the inner side of the first protective shell (1); a heat dissipation mechanism (3) is fixedly connected to the output end on the upper side of the bidirectional brushless motor (2); a transmission sleeve (4) is fixedly connected to the output end on the lower side of the heat dissipation mechanism (3); a fixed sleeve (5) is fixedly connected to the lower side of the first protective shell (1); the transmission sleeve (4) is located on the inner side of the fixed sleeve (5); and a grass cutting mechanism (6) is movably sleeved on the inner side of the fixed sleeve (5).

2. The brushless motor rotating structure for a grass trimmer according to claim 1, characterized in that: The heat dissipation mechanism (3) comprises a rotating seat (31), the lower side of the rotating seat (31) is fixedly connected to the output end on the upper side of the bidirectional brushless motor (2), the outer side of the rotating seat (31) is movably sleeved with a heat dissipation fan (32), the upper side of the first protective shell (1) is fixedly connected to the second protective shell (33) by a first screw, and the heat dissipation fan (32) is located on the inner side of the second protective shell (33).

3. The brushless motor rotating structure for a grass trimmer according to claim 1, characterized in that: The grass trimming mechanism (6) comprises a fixed seat (61), a grass trimming component (62) is movably mounted on the outer side of the fixed seat (61), a transmission seat (63) is fixedly connected to the upper side of the grass trimming component (62), the outer side of the fixed seat (61) is movably sleeved on the inner side of the fixed sleeve (5), and the outer side of the transmission seat (63) is movably sleeved on the inner side of the transmission sleeve (4).

4. The brushless motor rotating structure for a grass trimmer according to claim 3, characterized in that: A protective cover (64) is fixedly connected to the lower side of the fixing seat (61), and the grass trimming component (62) is located on the inner side of the protective cover (64).

5. The brushless motor rotating structure for a grass trimmer according to claim 4, characterized in that: The lower side of the fixed seat (61) is rotatably connected to a scraper (65), and the side wall of the protective cover (64) is movably sleeved at a position between the inner and outer walls of the scraper (65).

6. The brushless motor rotating structure for a grass trimmer according to claim 5, characterized in that: A rubber pad (66) is fixedly connected to the side of the inner wall of the scraper (65) away from the grass trimming component (62), and the side of the rubber pad (66) away from the grass trimming component (62) is in close contact with the inner side surface of the protective cover (64).

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