Lawn mower
The chamber design of the lawn mower chassis and the negative pressure airflow exchange generated by the cutting components solve the problem of heat dissipation of the self-propelled mechanism, prevent grass clips from adhering and extend the motor life.
Patent Information
- Application Number
- CN202422320180.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The self-propelled mechanism of existing lawn mowers is likely to affect the motor life due to heat accumulation during long-term use, and it is difficult to effectively dissipate heat by grass chips.
The chassis of the lawn mower is designed as chamber one and chamber two. The chamber two are connected with the external atmosphere, and gas exchange is achieved through the through holes on the partition plate, and gas is sucked into chamber one by the negative pressure generated by the cutting assembly. Combined with the structure of the guide plate and the side plate, heat dissipation of the self-propelled mechanism is achieved.
Effective heat dissipation self-propelled mechanism to prevent grass clippings from adhering and extend the service life of the motor.
Smart Images
Figure CN223168713U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of garden tools, and particularly relates to a lawn mower. Background Art
[0002] Most of the current lawn mowers on the market are equipped with a self-propelled mechanism for driving the lawn mower to walk autonomously. However, most of the self-propelled mechanisms are arranged in a relatively enclosed chamber, so that external grass clippings and dust basically do not enter the self-propelled mechanism. In this case, the heat of the self-propelled mechanism continues to rise; or some self-propelled mechanisms are designed with relevant heat dissipation structures, but when the lawn mower is used for a long time, the heat of the self-propelled mechanism still continues to rise, resulting in the heat accumulating in the chamber and being not easy to dissipate, which will still affect the service life of the motor. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a lawn mower in view of the above problems existing in the prior art. The technical problem to be solved by the utility model is: how to effectively dissipate the heat of the self-propelled mechanism.
[0004] The purpose of the utility model can be achieved by the following technical solutions:
[0005] A lawn mower, comprising a chassis, a self-propelled mechanism and a cutting assembly. It is characterized in that the chassis has a first chamber and a second chamber. The opening direction of the first chamber faces the ground. The cutting assembly is located in the first chamber. The second chamber is communicated with the external atmosphere. The self-propelled mechanism is located in the second chamber. A partition plate is provided between the first chamber and the second chamber. A through hole communicating the first chamber and the second chamber is opened on the partition plate or a through hole is formed between the partition plate and the inner wall of the chassis. When the lawn mower works, the cutting assembly generates negative pressure in the first chamber, and the second chamber sucks air from the external atmosphere and enters the first chamber through the through hole on the partition plate.
[0006] The chassis of this lawn mower is provided with a cutting assembly and a self-propelled mechanism. The cutting assembly is arranged in the first chamber, and the self-propelled mechanism is arranged in the second chamber. The first chamber and the second chamber are separated by a partition plate to a certain extent. At the same time, through holes are provided on the partition plate to enable the gas in the second chamber to enter the first chamber. When the lawn mower works, the cutting assembly rotates in the first chamber to cut the lawn. Due to the rotation of the cutting assembly, negative pressure will be generated in the first chamber, and the gas in the second chamber will be sucked into the first chamber through the through hole. Since the air in the second chamber is sucked into the first chamber, the second chamber will intake air from the external atmosphere. The gas entering the second chamber from the external atmosphere can dissipate the heat of the self-propelled mechanism. This lawn mower separates the first chamber and the second chamber through the partition plate, so that the grass clippings cut in the first chamber can be prevented from entering the second chamber and affecting the self-propelled mechanism, and the heat dissipation of the self-propelled mechanism can be realized.
[0007] In the above-mentioned lawn mower, a side plate extending toward chamber two is provided in chamber one, one side of the side plate is a grass collecting channel, and the self-propelled mechanism is located on the other side of the side plate; a guide plate is also provided in chamber one, and chamber one is divided into a cutting chamber and a guide chamber by the guide plate, and the through hole is located above or on the upper part of the partition plate. The guide chamber is located above the partition plate and communicates with chamber two where the self-propelled mechanism is located through the through hole, and a number of ventilation holes are provided on the guide plate; when the lawn mower is working, the gas enters chamber two, and enters the cutting chamber through the through hole, the guide chamber and the ventilation port in sequence.
[0008] When the lawn mower is working, the cutting assembly will rotate in chamber one, cutting the lawn and throwing the cut grass to the grass collection channel along the movement direction of the cutting assembly. The grass collection channel and the self-propelled mechanism are separated by side panels to prevent the cut grass from being thrown onto the self-propelled mechanism. During the cutting process, the cutting assembly will generate negative pressure in the cutting chamber when throwing the grass into the grass collection channel. The negative pressure in the cutting chamber will prompt the gas to be sucked in through the opening facing the ground in chamber two. Specifically, the gas enters from the opening facing the ground in chamber two, passes through the self-propelled mechanism, and dissipates heat from the surface of the self-propelled mechanism. Then the gas enters the guide chamber and enters the cutting chamber through the ventilation holes on the guide plate, thereby achieving heat dissipation of the self-propelled mechanism. The lawn mower uses partition plates, guide plates and side panels to place the self-propelled mechanism in a relatively independent space, and facilitates air intake from the outside and transports the gas to the grass collection channel, and prevents the cut grass from adhering to the self-propelled mechanism.
[0009] In the above-mentioned lawn mower, the cutting assembly includes a blade, the blade rotates to form a cutting plane, and the guide plate is at least partially arranged parallel to the cutting plane.
[0010] In the above-mentioned lawn mower, the guide plate and the self-propelled mechanism are arranged on the same side relative to the side plate.
[0011] In the above-mentioned lawn mower, one side of the guide plate is connected to the side plate, the guide plate is arranged along the rotation direction of the blade, and the other side abuts against the inner wall of the chamber one.
[0012] In the above-mentioned lawn mower, the guide plate includes plate body 1 and plate body 2, the side of plate body 1 is connected to the side plate, plate body 1 is arranged parallel to the cutting plane, and plate body 2 is arranged inclined toward the top wall of chamber 1.
[0013] In the above-mentioned lawn mower, the guide plate is fan-shaped, and at least two ventilation areas are provided on the guide plate along the rotation direction of the blade. Each ventilation area includes at least two ventilation holes spaced apart along the radial direction of the guide plate.
[0014] In the above-mentioned lawn mower, the area of the ventilation holes on the guiding plate near the side with a smaller radius is smaller than the area of the ventilation holes near the side with a larger radius.
[0015] In the above-mentioned lawn mower, the guiding plate further has reinforcing ribs arranged along the rotation direction of the blade, and the reinforcing ribs are located between two ventilation holes arranged at intervals along the radial direction of the guiding plate.
[0016] In the above-mentioned lawn mower, along the height direction of the lawn mower, the bottom edge of the partition plate is located below the self-propelled mechanism.
[0017] In the above-mentioned lawn mower, the cutting assembly further includes a vertically arranged cutting motor. An annular baffle is arranged in the first chamber around the cutting motor. The inner edge of the guiding plate is connected to the annular baffle, and the outer edge of the guiding plate is connected to the partition plate.
[0018] In the above-mentioned lawn mower, the cutting assembly includes a cutting motor, at least part of which extends above the chassis; a cover body, which has a third chamber on it. The cover body is connected to the chassis, at least part of the cutting motor is located in the third chamber, and the cover body has an air inlet channel communicating with the third chamber; the cutting motor has a heat dissipation channel communicating with the third chamber and the cutting chamber.
[0019] In the above-mentioned lawn mower, the cover body includes an upper cover and a lower cover. The air inlet channel is located on the lower cover, and the air inlet of the air inlet channel is arranged downward, and the upper cover covers the upper part of the air inlet channel.
[0020] In the above-mentioned lawn mower, a control board connected to the lower cover is further arranged in the third chamber, and the control board is located above the cutting motor.
[0021] A lawn mower, including a chassis, on which a self-propelled mechanism and a cutting motor are installed. A blade is connected to the output shaft of the cutting motor, and it is characterized in that
[0022] The chassis has a first chamber and a second chamber. The first chamber opens towards the ground. The second chamber communicates with the external atmosphere. A partition plate is arranged between the first chamber and the second chamber. A through hole communicating the first chamber and the second chamber is opened on the partition plate or a through hole is formed between the partition plate and the inner wall of the chassis. The blade is located in the first chamber, and the self-propelled mechanism is located in the second chamber;
[0023] A cover body with a third chamber is connected to the chassis. At least part of the cutting motor is located in the third chamber. The cover body has an air inlet channel communicating with the third chamber. The cutting motor has a heat dissipation channel communicating with the third chamber and the cutting chamber;
[0024] When the lawn mower is working, the blade generates a negative pressure in Chamber One, creating a suction force on the gas in Chamber Two and the heat dissipation channel, causing Chamber Two to intake air from the external atmosphere and Chamber Three to intake air through the intake channel.
[0025] In the above-mentioned lawn mower, a side plate extending towards Chamber Two is provided in Chamber One. One side of the side plate is a grass collection channel, and the self-propelled mechanism is located on the other side of the side plate;
[0026] A guiding plate is also provided in Chamber One. Chamber One is divided into a cutting chamber and a guiding chamber by the guiding plate. The through hole is located above or at the upper part of the partition plate. The guiding chamber is communicated with Chamber Two where the self-propelled mechanism is located through the through hole above the partition plate, and a number of ventilation holes are provided on the guiding plate;
[0027] When the lawn mower is working, gas enters Chamber Two and successively enters the cutting chamber through the through hole, the guiding chamber, and the ventilation opening.
[0028] In the above-mentioned lawn mower, along the height direction of the lawn mower, the bottom edge of the partition plate is located below the self-propelled mechanism.
[0029] In the above-mentioned lawn mower, an annular baffle is provided in Chamber One around the cutting motor. The inner edge of the guiding plate is connected to the annular baffle, and the outer edge of the guiding plate is connected to the partition plate.
[0030] In the above-mentioned lawn mower, the cover body includes an upper cover and a lower cover. The intake channel is located on the lower cover, and the intake port of the intake channel is arranged downward, and the upper cover covers the upper part of the intake channel.
[0031] In the above-mentioned lawn mower, a control board connected to the lower cover is also provided in Chamber Three, and the control board is located above the cutting motor.
[0032] A lawn mower, comprising a chassis, a self-propelled mechanism, and a cutting assembly, is characterized in that
[0033] The chassis has Chamber One and Chamber Two. Chamber One opens towards the ground. The cutting assembly is located in Chamber One. Chamber Two is communicated with the external atmosphere. The self-propelled mechanism is located in Chamber Two;
[0034] A partition plate is provided between Chamber One and Chamber Two. A through hole communicating Chamber One and Chamber Two is provided on the partition plate or a through hole is formed between the partition plate and the inner wall of the chassis;
[0035] When the lawn mower is working, external atmosphere enters Chamber Two, passes through the self-propelled mechanism in Chamber Two, and enters the cutting chamber through the through hole on the partition plate.
[0036] In the above-mentioned lawn mower, a side plate extending towards Chamber Two is provided in Chamber One. One side of the side plate is a grass collection channel, and the self-propelled mechanism is located on the other side of the side plate;
[0037] A guiding plate is further provided in Chamber One. Chamber One is separated by the guiding plate to form a cutting chamber.
[0038] When the lawn mower is working, external air enters Chamber Two, and part of the gas sequentially passes through Chamber Two, the through hole, the cutting chamber, and the grass collection channel.
[0039] Compared with the prior art, the present lawn mower has the following advantages:
[0040] When the present lawn mower is working, it can effectively dissipate heat from the self-propelled mechanism, and at the same time prevent the grass in the cutting chamber from affecting the self-propelled mechanism. BRIEF DESCRIPTION OF THE DRAWINGS
[0041] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0042] Figure 1 is a schematic perspective partial sectional view of the present lawn mower.
[0043] Figure 2 is a partial perspective view of one perspective in the bottom view state of the present lawn mower.
[0044] Figure 3 is a partial perspective view of another perspective in the bottom view state of the present lawn mower.
[0045] Figure 4 is a partial perspective view of the present lawn mower in the bottom view state without the blade installed.
[0046] Figure 5 is a partial cross-sectional view of the present lawn mower.
[0047] Figure 6 is Figure 5 the partial enlarged view I.
[0048] Figure 7 is Figure 5 the partial enlarged view II.
[0049] Figure 8 is an exploded view of the lawn mower cover.
[0050] Figure 9 is a cross-sectional view of Embodiment Two. Detailed implementation mode
[0051] The technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0052] Embodiment 1
[0053] As Figure 1 、 Figure 2 and Figure 5 shown, this lawn mower includes a chassis 1 with a chamber, the opening of the chamber faces the ground direction, a partition plate 6 is provided in the chamber of the chassis 1, and the partition plate 6 divides the chamber of the chassis 1 into a mutually connected chamber one 4 and a chamber two 5. Specifically, the openings of the chamber one 4 and the chamber two 5 face the ground. In this embodiment, the chamber two 5 is communicated with the external atmosphere by making the opening of the chamber two 5 face the ground. The effect of communicating the chamber two 5 with the external atmosphere can also be achieved by opening through holes on the inner walls of the chamber two 5 in the left-right direction. As a preference, in this embodiment, the opening of the chamber two 5 is arranged downward, which can obtain a larger intake space, allow more air to contact the mechanism in the chamber two 5, be more conducive to heat dissipation, and facilitate maintenance.
[0054] A through hole 6a communicating the chamber one 4 and the chamber two 5 is opened on the partition plate. The through hole 6a can be a dense distribution of small holes on the partition plate 6; or after the partition plate 6 is fixed on the chassis 1, the through hole 6a is formed between the partition plate 6 and the top inner wall of the chassis 1. As a preference, in this embodiment, the through hole 6a is formed between the partition plate 6 and the inner wall of the chassis 1.
[0055] The chamber one 4 and the chamber two 5 communicate with each other above the partition plate 6, and the chamber two 5 is formed by the partition plate 6 and the chassis 1 enclosing each other.
[0056] As Figures 1 to 3 shown, a cutting assembly 3 is provided in the chamber one 4, and the cutting assembly 3 includes a cutting motor 3b and a blade 3a; a self-propelled mechanism 2 is provided in the chamber two 5, and the self-propelled mechanism 2 includes a speed reducer and a driving motor. A side plate 7 is provided in the chamber one 4, and the side plate 7 extends from the chamber one 4 towards the chamber two 5 and divides the chamber one 4 into a grass collection channel 8, and the grass collection channel 8 communicates with the grass collection bag of the lawn mower. The grass collection channel 8 is located on one side of the side plate 7, and the self-propelled mechanism 2 is located on the other side of the side plate 7. The side plate 7 prevents the cut grass from adhering to the self-propelled mechanism 2 when entering the grass collection bag.
[0057] Furthermore, as Figures 2 to 5As shown, a guide plate 9 is further provided within chamber 1 4. The guide plate 9 surrounds the cutting motor 3b, and one side of the guide plate 9 is connected to the top edge of the partition plate 6. The guide plate 9 divides chamber 1 4 into a cutting chamber 4a and a guide chamber 4b. The cutting chamber 4a is located below the guide plate 9, while the guide chamber 4b is located above the guide plate 9 and communicates with chamber 2 5. A plurality of ventilation holes 10a are provided on the guide plate 9 to provide ventilation connection between the guide chamber 4b and the cutting chamber 4a. The number of ventilation holes 10a can be two or three, depending on actual needs. Preferably, three ventilation holes 10a are used.
[0058] like Figure 1 、 Figure 3 and Figure 5 As shown, when the lawn mower is operating, blade 3a rotates within cutting chamber 4a to cut the lawn, and the cut grass is flung toward grass collection channel 8 along the direction of blade 3a's movement, where it is then collected in a grass collection bag. Grass collection channel 8 is separated from self-propelled mechanism 2 by side panel 7 to prevent the cut grass from being flung onto self-propelled mechanism 2. During the cutting process, the rotation of blade 3a creates negative pressure within cutting chamber 4a. This negative pressure in cutting chamber 4a causes gas to be drawn inward through chamber 2 5 through the ground-facing opening, dissipating heat from self-propelled mechanism 2. Specifically, gas enters through the ground-facing opening of chamber 2 5, passes through the surface of self-propelled mechanism 2, dissipating heat from self-propelled mechanism 2, then enters guide chamber 4b, enters cutting chamber 4a through ventilation holes 10a on guide plate 9, and is transported to grass collection channel 8 along with the cut grass as blade 3a rotates. In this way, heat dissipation of the self-propelled mechanism 2 is achieved. The lawn mower places the self-propelled mechanism 2 in a relatively independent space through the partition plate 6, the guide plate 9 and the side plate 7, and facilitates air intake from the outside and transporting the gas to the grass collection channel 8, and prevents the cut grass from adhering to the self-propelled mechanism 2.
[0059] Further, such as Figure 1 and Figure 5 As shown, along the height direction of the lawn mower, the self-propelled mechanism 2 is located above the bottom edge of the partition plate 6, and the bottom edge of the partition plate 6 is closer to the ground relative to the self-propelled mechanism 2, so that the self-propelled mechanism 2 can be blocked by the partition plate 6, and can prevent grass clippings or gravel caused by the rotation of the blade 3a from damaging the self-propelled mechanism 2. While achieving heat dissipation of the self-propelled mechanism 2, it reduces the influence of grass clippings and gravel on the self-propelled mechanism 2.
[0060] Further, such as Figure 3 and Figure 4 As shown, the guide plate 9 and the self-propelled mechanism 2 are arranged on the same side relative to the side plate 7 to shorten the path length of the gas passing through the self-propelled mechanism 2 into the cutting chamber 4a, which is more conducive to the heat dissipation of the self-propelled mechanism 2.
[0061] like Figure 1 、 Figure 2 andFigure 5 As shown, the cutting motor 3b is vertically arranged. An annular baffle 12 is arranged in the first chamber 4 around the cutting motor 3b. The guiding plate 9 is fan-shaped. The guiding plate 9 is arranged between the partition plate 6 and the annular baffle 12 along the rotation direction of the blade 3a. The outer arc edge of the guiding plate 9 is connected to the partition plate 6, the inner arc edge of the guiding plate 9 is connected to the annular baffle 12, the radial edge on one side of the guiding plate 9 is connected to the side plate 7, and the radial edge on the other side of the guiding plate 9 is connected to the inner wall of the chassis 1, so as to guide the air flow generated by the rotation of the blade 3a in the cutting chamber 4a.
[0062] Furthermore, the blade 3a rotates driven by the cutting motor 3b to form a cutting plane. At least part of the guiding plate 9 is arranged parallel to the cutting plane. When the blade 3a rotates in the cutting chamber 4a, an air flow direction will be generated. When the guiding plate 9 is arranged parallel to the cutting plane of the blade 3a, it can further prevent grass from entering the guiding chamber 4b.
[0063] Specifically, as Figure 1 and Figure 4 shown, the guiding plate 9 includes a first plate body 9a and a second plate body 9b. The first plate body 9a and the second plate body 9b are arranged along the rotation direction of the blade 3a. The first plate body 9a is arranged parallel to the cutting plane. The radial edge of the first plate body 9a is connected to the side plate 7. The second plate body 9b is inclined upward towards the top of the first chamber 4. The top radial edge of the second plate body 9b is connected to the inner wall of the chassis 1.
[0064] Furthermore, as Figure 1 and Figure 4 shown, at least two ventilation areas 10 are arranged on the guiding plate 9. One ventilation area 10 is located on the first plate body 9a, and one ventilation area 10 is located on the second plate body 9b. Each ventilation area 10 includes at least two ventilation holes 10a arranged at intervals along the radial direction of the guiding plate 9. The area of the ventilation holes 10a near the side with a smaller radius of the guiding plate 9 is smaller than the area of the ventilation holes 10a near the side with a larger radius. The change in the area of the ventilation holes 10a can increase the ventilation volume, enhance the ventilation effect, and further increase the air flow passing through the self-propelled mechanism 2, thus improving the heat dissipation effect. In this embodiment, three ventilation areas 10 are arranged on the guiding plate 9, two of which are located on the first plate body 9a and one is located on the second plate body 9b.
[0065] Furthermore, as Figure 1 、 Figure 2 and Figure 4 shown, the guiding plate 9 also has a reinforcing rib 11 arranged along the rotation direction of the blade 3a. The reinforcing rib 11 is located between two ventilation holes 10a arranged at intervals along the radial direction of the guiding plate 9. The reinforcing rib 11 is suitable for increasing the strength of the guiding plate 9.
[0066] Furthermore, asFigure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown in Figure 8 , after the cutting motor 3b is installed on the chassis 1, the output end of the output shaft of the cutting motor 3b is located in the cutting cavity 4a and is connected to the blade 3a, and the tail of the cutting motor 3b is located outside the chassis 1 and above the chassis 1. A cover body 13 is further connected to the chassis 1. The cover body 13 includes an upper cover 13a and a lower cover 13b. The upper cover 13a and the lower cover 13b are connected to form a chamber three 14. The part of the cutting motor 3b located above the chassis 1 extends into the chamber three 14. An air inlet channel 15 is provided on the cover body 13 to communicate with the external atmosphere, and a heat dissipation channel 3b1 communicating the chamber three 14 and the cutting cavity 4a is provided on the cutting motor 3b. When the lawn mower is working, the blade 3a generates a negative pressure in the cutting cavity 4a. The negative pressure acts on the heat dissipation channel 3b1, and the air in the chamber three 14 is sucked into the cutting cavity 4a through the heat dissipation channel 3b1, prompting the air inlet channel 15 to suck air from the external atmosphere, thereby being able to cool the cutting motor 3b.
[0067] Further, as Figure 1 , Figure 5 and Figure 6 shown, the air inlet channel 15 can be opened on the upper cover 13a or the lower cover 13b. Preferably, it is opened on the lower cover 13b, and the air inlet of the air inlet channel 15 is opened downward, thereby being able to prevent rainwater, dust, grass clippings, etc. from entering the chamber three 14 through the air inlet channel 15 and affecting the cutting motor 3b.
[0068] Further, as Figure 5 , Figure 7 and Figure 8 shown, a control board 16 is further provided in the chamber three 14. The control board 16 is located above the cutting motor 3b and is connected to the lower cover 13b. Thus, when the air is sucked into the chamber three 14, the control board 16 can also be cooled.
[0069] As Figure 5 shown, when the lawn mower is working, the negative pressure generated by the rotation of the blade 3a can act on both the chamber two 5 and the chamber three 14 at the same time. The external atmosphere is sucked into the chamber two 5 and the chamber three 14 to dissipate heat from the drive motor, the cutting motor 3b, and the controller respectively.
[0070] Embodiment Two
[0071] This embodiment is substantially the same as the above embodiment, and the difference is that in this embodiment, no ventilation hole 10a is opened on the guide plate 9, and a through hole 6a is opened on the partition plate 6, and the external atmosphere directly enters the chamber one 4 through the through hole 6a on the partition plate after entering the chamber two 5.
[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A lawn mower, comprising a chassis, a self - propelled mechanism and a cutting assembly, characterized in that a first chamber and a second chamber are provided on the chassis, the opening direction of the first chamber faces the ground, the cutting assembly is located in the first chamber, the second chamber communicates with the external atmosphere, and the self - propelled mechanism is located in the second chamber; a partition plate is provided between the first chamber and the second chamber, and a through - hole communicating the first chamber and the second chamber is formed on the partition plate or a through - hole is formed between the partition plate and the inner wall of the chassis; when the lawn mower is working, the cutting assembly generates negative pressure in the first chamber, and the second chamber sucks air from the external atmosphere and enters the first chamber through the through - hole on the partition plate.
2. The lawn mower according to claim 1, wherein, a side plate extending towards the second chamber is provided in the first chamber, one side of the side plate is a grass collection channel, and the self - propelled mechanism is located on the other side of the side plate; a guiding plate is further provided in the first chamber, the first chamber is divided into a cutting chamber and a guiding chamber by the guiding plate, the through - hole is located above or at the upper part of the partition plate, the guiding chamber is located above the partition plate and communicates with the second chamber where the self - propelled mechanism is located through the through - hole, and a plurality of ventilation holes are formed on the guiding plate; when the lawn mower is working, air enters the second chamber and sequentially passes through the through - hole, the guiding chamber and the ventilation openings and enters the cutting chamber.
3. The lawn mower according to claim 2, characterized in that, the cutting assembly includes a blade, and the blade rotates to form a cutting plane, and at least part of the guiding plate is arranged parallel to the cutting plane.
4. The lawn mower according to claim 3, characterized in that, the guiding plate and the self - propelled mechanism are arranged on the same side of the side plate.
5. The lawn mower according to claim 4, characterized in that, one side edge of the guiding plate is connected to the side plate, the guiding plate is arranged along the rotation direction of the blade, and the other side edge abuts against the inner wall of the first chamber.
6. The lawn mower according to claim 2 or 3 or 4 or 5, characterized in that, the guiding plate includes a first plate body and a second plate body, the side edge of the first plate body is connected to the side plate, the first plate body is arranged parallel to the cutting plane, and the second plate body is inclined towards the top chamber wall of the first chamber.
7. The lawn mower according to claim 2 or 3 or 4, characterized in that, the guiding plate is in a fan - ring shape, and at least two ventilation areas are arranged on the guiding plate along the rotation direction of the blade, and each ventilation area includes at least two ventilation holes arranged at intervals along the radial direction of the guiding plate.
8. The lawn mower according to claim 7, characterized in that, the area of the ventilation holes on the guiding plate near the side with a smaller radius is smaller than the area of the ventilation holes near the side with a larger radius.
9. The lawn mower according to claim 8, characterized in that, the guiding plate further has a reinforcing rib arranged along the rotation direction of the blade, and the reinforcing rib is located between two ventilation holes arranged at intervals along the radial direction of the guiding plate.
10. The lawn mower according to claim 2 or 3 or 4 or 5, characterized in that, along the height direction of the lawn mower, the bottom edge of the partition plate is located below the self - propelled mechanism.
11. The lawn mower according to claim 7, characterized in that, the cutting assembly further includes a vertically arranged cutting motor, an annular baffle is provided in the first chamber around the cutting motor, the inner edge of the guiding plate is connected to the annular baffle, and the outer edge of the guiding plate is connected to the partition plate.
12. The lawn mower according to claim 1 or 2 or 3 or 4 or 5, characterized in that, the cutting assembly includes a cutting motor, and at least part of the cutting motor extends above the chassis; a cover body, a third chamber is provided on the cover body, the cover body is connected to the chassis, at least part of the cutting motor is located in the third chamber, and an air intake channel communicating with the third chamber is provided on the cover body; a heat dissipation channel communicating the third chamber and the cutting chamber is provided on the cutting motor.
13. The lawn mower according to claim 12, characterized in that, the cover body includes an upper cover and a lower cover, the air intake channel is located on the lower cover, and the air intake port of the air intake channel faces downwards, and the upper cover covers the upper part of the air intake channel.
14. The lawn mower according to claim 12, characterized in that, A control board connected to the lower cover is further provided in the third chamber, and the control board is located above the cutting motor.
15. A lawn mower, comprising a chassis, a self-propelled mechanism and a cutting motor are mounted on the chassis, and a blade is connected to the output shaft of the cutting motor. It is characterized in that a first chamber and a second chamber are provided on the chassis, the first chamber opens towards the ground, the second chamber communicates with the external atmosphere, a partition plate is provided between the first chamber and the second chamber, and a through hole communicating the first chamber and the second chamber is provided on the partition plate or a through hole is formed between the partition plate and the inner wall of the chassis. The blade is located in the first chamber, and the self-propelled mechanism is located in the second chamber; a cover body with a third chamber is connected to the chassis, at least part of the cutting motor is located in the third chamber, an air inlet channel communicating with the third chamber is provided on the cover body, and a heat dissipation channel communicating with the third chamber and the cutting chamber is provided on the cutting motor; When the lawn mower is working, the blade generates negative pressure in the first chamber, sucking the gas in the second chamber and the heat dissipation channel, so that the second chamber intakes air from the external atmosphere, and the third chamber intakes air through the air inlet channel.
16. The lawn mower according to claim 15, wherein, A side plate extending towards the second chamber is provided in the first chamber, one side of the side plate is a grass collection channel, and the self-propelled mechanism is located on the other side of the side plate; A guiding plate is further provided in the first chamber. The first chamber is divided into a cutting chamber and a guiding chamber by the guiding plate. The through hole is located above or at the upper part of the partition plate. The guiding chamber is located above the partition plate and communicates with the second chamber where the self-propelled mechanism is located through the through hole, and a plurality of ventilation holes are provided on the guiding plate; When the lawn mower is working, the gas enters the second chamber and then enters the cutting chamber through the through hole, the guiding chamber and the ventilation opening in sequence.
17. The lawn mower according to claim 15 or 16, characterized in that, Along the height direction of the lawn mower, the bottom edge of the partition plate is located below the self-propelled mechanism.
18. The lawn mower according to claim 16, characterized in that, The guiding plate is arranged in a fan shape along the rotation direction of the blade, one side edge is connected to the side plate, and the other side edge abuts against the inner wall of the first chamber.
19. The lawn mower according to claim 18, characterized in that, An annular baffle is provided in the first chamber around the cutting motor. The inner edge of the guiding plate is connected to the annular baffle, and the outer edge of the guiding plate is connected to the partition plate.
20. The lawn mower according to claim 15 or 16, characterized in that, The cover body includes an upper cover and a lower cover. The air inlet channel is located on the lower cover, and the air inlet of the air inlet channel is arranged downward, and the upper cover covers the upper part of the air inlet channel.
21. The lawn mower according to claim 20, characterized in that, A control board connected to the lower cover is further provided in the third chamber, and the control board is located above the cutting motor.
22. A lawn mower, comprising a chassis, a self-propelled mechanism and a cutting assembly. It is characterized in that a first chamber and a second chamber are provided on the chassis, the first chamber opens towards the ground, the cutting assembly is located in the first chamber, the second chamber communicates with the external atmosphere, and the self-propelled mechanism is located in the second chamber; a partition plate is provided between the first chamber and the second chamber, and a through hole communicating the first chamber and the second chamber is provided on the partition plate or a through hole is formed between the partition plate and the inner wall of the chassis; When the lawn mower is working, the external atmosphere enters the second chamber, passes through the self-propelled mechanism in the second chamber, and enters the cutting chamber through the through hole on the partition plate.
23. The lawn mower according to claim 22, characterized in that A side plate extending towards the second chamber is provided in the first chamber, one side of the side plate is a grass collection channel, and the self-propelled mechanism is located on the other side of the side plate; A guiding plate is further provided inside the first chamber, and the first chamber is separated by the guiding plate to form a cutting chamber. When the lawn mower is working, external air enters the second chamber, and part of the gas sequentially passes through the second chamber, the through hole, the cutting chamber, and the grass collection channel.