CN112586177A

CN112586177A - Mower with independent heat dissipation air duct

Info

Publication number: CN112586177A
Application number: CN202011247862.6A
Authority: CN
Inventors: 邹斌; 张闯; 陈刚
Original assignee: Zhejiang YAT Electrical Appliance Co Ltd
Current assignee: Zhejiang YAT Electrical Appliance Co Ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-04-02
Anticipated expiration: 2040-11-10
Also published as: CN112586177B

Abstract

The invention discloses a lawn mower with an independent cooling air duct, comprising a chassis, a motor, a motor base and a motor support plate. The chassis is provided with a volute, the end of the motor output shaft is fixedly connected with a blade, and the motor base and the motor support plate The upper and lower connections form an accommodating cavity, and also includes a radiating air duct, the air inlet of the radiating air duct is sealed with the accommodating cavity, the air outlet of the radiating air duct is led to the outside of the volute, and the air outlet of the radiating air duct is downward. The invention changes the open structure of the air duct in the prior art by setting an independent cooling air duct for the motor, so that grass clippings and dust cannot enter the motor along the cooling air duct when the lawn mower is working, and the air outlet is set at the same time. On the outside of the volute, avoid the setting of the volute. When cleaning the volute, the water mist cannot enter the motor along the air outlet to avoid damage to the motor. By setting the cross-sectional area of the cooling air duct to gradually increase along the airflow direction It can also improve the heat dissipation efficiency.

Description

Mower with independent heat dissipation air duct

Technical Field

The invention belongs to the field of garden equipment, and particularly relates to a mower with an independent heat dissipation air duct.

Background

The lawn mower is common garden equipment, the blade is driven to rotate by the motor to cut a lawn, the chassis is provided with a volute, the blade generates airflow while rotating to mow the lawn, and cut grass scraps are driven to flow into the grass collecting box along the volute. Because the motor can generate heat after long-time running, the fan blades are arranged on the output shaft of the motor, so that the motor can drive the fan blades to rotate when the motor drives the fan blades to rotate, and a cooling effect is generated on the motor. Generally adopt open wind channel among the prior art, set up the vent in motor support plate below promptly, in the grass bits dust easily gets into the motor like this, use and lead to the motor to damage to become invalid after a period, the position of vent setting in motor support plate back is set up to the chance of mowing in addition, can reduce the grass bits dust to a certain extent like this and get into in the motor, but this air outlet position is located the spiral case, and in the water smoke easily enters into the motor along the vent when wasing the spiral case, also can lead to the motor to damage to become invalid. In addition, when the existing mower mows at a low gear, namely mows a lawn with a lower height, the chassis is close to the ground, so that the blade is difficult to suck air from the outside while rotating to mow the lawn, and the blade cannot generate enough airflow to drive grass scraps to enter the grass collecting box, so that the grass collecting rate of the existing mower is very low when the existing mower mows at the low gear.

Disclosure of Invention

The invention aims to provide a mower with an independent heat dissipation air duct, which can effectively solve the problem that in the prior art, due to the unreasonable arrangement position of a heat dissipation vent of a motor, grass dust is easy to enter during working or water mist is easy to enter during cleaning.

In order to solve the technical problems, the invention adopts the following technical scheme: lawn mower with independent heat dissipation wind channel, including chassis, motor cabinet and motor backup pad, be equipped with the spiral case on the chassis, the output shaft tip fixedly connected with blade of motor, the motor cabinet is connected from top to bottom with the motor backup pad and is formed and hold the chamber, still includes the heat dissipation wind channel, the air intake in heat dissipation wind channel with hold chamber sealing connection, the air outlet in heat dissipation wind channel leads to the spiral case outside to the air outlet in heat dissipation wind channel is downward.

Preferably, the cross-sectional area of the heat dissipation air duct gradually increases along the airflow flowing direction. The cross-sectional area of the heat dissipation air channel is gradually increased along the air flow flowing direction, the air flow flows to the air outlet from the containing cavity, the cross-sectional area of the heat dissipation air channel is designed to be small at the beginning, the air flow can flow quickly, the cross-sectional area of the heat dissipation air channel is gradually increased, the air flow can be diffused and quickly dissipated, and therefore the cooling effect can be improved.

Preferably, an air outlet is formed in the chassis at the front end of the volute, and an air outlet of the heat dissipation air duct is connected with the air outlet. On being connected to the exhaust vent through the air outlet with the wind channel that looses, can fix the air-out end in wind channel that looses, reduce the rocking in wind channel that looses, lead the air outlet in wind channel that looses to the front end of spiral case in addition, the lawn mower wholly has the symmetry, and design like this is more compact structurally.

Preferably, the heat dissipation air duct comprises a horizontal section and an arc-shaped section, the horizontal section is arranged above the volute, the arc-shaped section is attached to the volute from top to bottom, and the radian of the arc-shaped section is matched with the radian of the outer surface of the volute. According to the structural design horizontal segment and the arc-shaped segment of the existing volute, the horizontal segment is arranged above the volute, so that the arc-shaped segment is attached to the volute, and the occupied space of a heat dissipation air channel can be reduced as much as possible while the heat dissipation effect is ensured.

Preferably, the accommodating cavity is provided with an opening, and the end part of the horizontal section is in interference fit with the opening. The mode that adopts interference fit connects stably and inseparably, can guarantee good leakproofness simultaneously, prevents that the dust from getting into to easily dismouting.

Preferably, the end part of the arc-shaped section is provided with a fixing frame, the edge of the air outlet hole extends outwards to form a convex enclosure matched with the fixing frame, and the fixing frame is sleeved outside the convex enclosure. The connection mode is simple and convenient, and has good sealing performance.

Preferably, the horizontal section is integrally formed with the arcuate section. The manufacturing is convenient, the good sealing performance can be ensured, and the flowing of the radiating air is facilitated.

Preferably, the volute on the two sides of the horizontal section is provided with clamping pieces for fixing the heat dissipation air duct. At the lawn mower during operation, because the rotation of motor and operating personnel's action, lawn mower itself has great vibration and rocks, consolidates the heat dissipation wind channel through setting up the fastener, can prevent effectively that the heat dissipation wind channel from rocking, can also play the assurance heat dissipation wind channel and hold chamber and exhaust vent and be connected stable effect.

Preferably, a first air deflector is arranged in the air outlet, one end of the first air deflector is flush with the edge of the air outlet or extends out of the air outlet, a grass collecting channel is formed on the inner surface of the volute, an air supplementing groove is formed in the surface of the chassis between the grass collecting channel and the air outlet, and the first air deflector and the air supplementing groove are used for enabling part of heat dissipation air to flow into the grass collecting channel. The air outlet hole is arranged on a chassis at the front end of the volute, the chassis between the air outlet hole and the grass collecting channel is provided with an air supplementing groove, and the first air guide sheet is arranged in a matched mode. Because the blade is difficult to induced draft from the external world when rotatory among the prior art under low gear state, lead to the grass collection rate lower, through the setting of first guide vane and tonifying wind groove, mend partial heat dissipation wind to the grass collection passageway in, can effectively improve the grass collection rate of lawn mower in low gear during operation.

Preferably, a second air guiding sheet perpendicular to the first air guiding sheet is further arranged in the air outlet hole. Can cut the exhaust vent into a plurality of less exhaust vents like this, accelerate the air current flow velocity to a certain extent, be favorable to for gathering the interior air supplement of grass passageway. Meanwhile, the diffusion of the heat dissipating air flowing out of the air outlet between the first air guide sheet and the air supplementing groove can be reduced, so that the heat dissipating air is fully supplemented into the grass collecting channel.

Compared with the prior art, the invention has the following beneficial effects: the heat dissipation fan blade rotates to drive the airflow to flow, the airflow flows outwards along the heat dissipation air duct from the accommodating cavity and flows out from the air outlet, and the effect of cooling the motor is achieved. Through setting up independent heat dissipation wind channel for the motor, the open structure in wind channel among the prior art has been changed, and in the lawn mower during operation grass bits dust can not enter into the motor along heat dissipation wind channel like this, avoids causing the motor to damage. Meanwhile, the air outlet of the cooling fan is arranged on the outer side of the volute, so that the air outlet avoids the inner surface of the volute, water mist cannot enter the motor along the air outlet when the volute is cleaned, and the motor is prevented from being damaged. The air outlet of the heat dissipation air duct is arranged downwards, so that dust can be prevented from entering the motor when the heat dissipation air duct is placed daily.

Drawings

Fig. 1 is a schematic structural diagram of a mower with an independent heat dissipation air duct according to an embodiment;

fig. 2 is a schematic view illustrating a connection between a heat dissipation air duct, a motor base and a motor support plate in the first embodiment;

FIG. 3 is a schematic view of the motor mount of FIG. 1 with the motor mount removed;

fig. 4 is a schematic structural diagram of a motor, a heat dissipation fan blade, and a heat dissipation air duct in the first embodiment;

FIG. 5 is a schematic bottom view of the lawnmower of FIG. 1;

fig. 6 is a schematic structural diagram of a mower with an independent heat dissipation air duct according to the second embodiment;

fig. 7 is an enlarged view of a portion a in fig. 6.

Wherein: 1. the wind power generator comprises a base plate, 10 wind outlet holes, 11 first wind guide pieces, 12 second wind guide pieces, 13 spiral cases, 130 grass collecting channels, 131 grass collecting outlets, 14 clamping pieces, 15 wind supplementing grooves, 2 motors, 20 output shafts, 3 motor bases, 4 motor supporting plates, 5 heat dissipation fan blades, 6 heat dissipation air channels, 60 horizontal sections, 61 arc sections, 62 fixing frames and 7 blades.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance, and that the terms "mounted," "connected," "secured," and the like are to be construed broadly and, for example, as being fixedly connected, detachably connected, or integrally formed, unless otherwise explicitly stated or limited; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The first embodiment is as follows: as shown in fig. 1, the mower with an independent heat dissipation air duct provided in this embodiment includes a chassis 1, a motor 2, a motor base 3, and a motor support plate 4, wherein a volute 13 is disposed on the chassis 1, the volute 13 is disposed around the motor support plate 4 by a circle, where the volute 13 refers to a portion of the chassis 1 that is protruding in an annular shape, that is, the volute 13 is integrally formed with the chassis 1, and is called as the volute 13 because the shape is like a snail shell. Referring to fig. 2, the motor 2 is mounted on the motor base 3, the motor base 3 is connected with the motor support plate 4, the motor support plate 4 is connected with the chassis 1, and the motor 2 is fixedly supported on the chassis 1 through the motor base 3 and the motor support plate 4. Referring to fig. 3 and 4, a heat dissipation fan blade 5 is disposed in the middle of an output shaft of the motor 2, the motor base 3 and the motor support plate 4 are connected to form a containing cavity, the heat dissipation fan blade 5 is located in the containing cavity, and further referring to fig. 5, the output shaft 20 of the motor 2 penetrates through the motor base 3 and the motor 2, the end of the output shaft 20 of the motor 2 is fixedly connected with the blade 7, the inner surface of the volute 13 forms a grass collecting channel 130 for collecting cut grass clippings, when the blade 7 rotates to cut a lawn, the blade can drive airflow to flow, so that the grass clippings flow to a grass collecting outlet 131 along the grass collecting channel 130, and the grass collecting outlet 131 can be provided with a grass collecting box or a grass collecting bag (not shown in the figure. The above parts belong to important structures of mowers in the prior art, as shown in fig. 1 to 5, in this embodiment, an independent heat dissipation air duct 6 is designed for the mowers, an air inlet of the heat dissipation air duct 6 is hermetically connected with the accommodating cavity, an air outlet of the heat dissipation air duct 6 leads to the outer side of the volute 13, and an air outlet of the heat dissipation air duct 6 is arranged downward. In the present embodiment, the terms "front end", "above", "up and down" and the like indicate orientations, and all the orientations are as shown in fig. 1.

In this embodiment, an independent heat dissipation air duct 6 is designed for the mower, and when the heat dissipation fan blade 5 rotates to drive the air flow to flow, the air flow flows outwards along the heat dissipation air duct 6 from the accommodating cavity and flows out from an air outlet of the heat dissipation air duct 6, so that the motor 2 is cooled. The structure that the air duct is open among the prior art has been changed, and the grass bits dust can not enter into motor 2 along heat dissipation air duct 6 when the lawn mower work like this, avoids causing motor 2 to damage. Meanwhile, the air outlet of the heat dissipation air duct 6 is arranged on the outer side of the volute casing 13, so that the air outlet avoids the inner portion of the volute casing 13, water mist cannot enter the motor 2 along the air outlet when the volute casing 13 is cleaned, and damage to the motor 2 is avoided.

Wherein, still set up the cross-sectional area of heat dissipation wind channel 6 to be along the air current direction of flow crescent in this embodiment, the air current flows to the air outlet from holding the chamber like this, and the cross-sectional area design of heat dissipation wind channel 6 is less to be favorable to the quick flow of air current initially, and the cross-sectional area crescent of heat dissipation wind channel 6 is favorable to the air current to spread out quick heat dissipation, consequently sets up like this and can improve the cooling effect.

In this embodiment, an air outlet 10 is further formed in the chassis 1 at the front end of the volute 13, and an air outlet of the heat dissipation air duct 6 is connected with the air outlet 10. Can fix the air-out end in heat dissipation wind channel 6 like this, reduce rocking in heat dissipation wind channel 6, lead to the front end of spiral case 13 with the air outlet in heat dissipation wind channel 6 in addition, the lawn mower wholly has the symmetry, designs like this and is more compact structurally.

Wherein, in order to reduce the occupation space of the heat dissipation air duct 6 as far as possible, the design of the heat dissipation air duct 6 attached to the volute casing 13 in the embodiment, the heat dissipation air duct 6 includes a horizontal section 60 and an arc-shaped section 61, the horizontal section 60 is arranged above the volute casing 13, the arc-shaped section 61 is attached to the volute casing 13 from top to bottom, and the radian of the arc-shaped section 61 is matched with the radian of the outer surface of the volute casing 13. Therefore, the occupied space of the heat dissipation air duct 6 can be reduced as much as possible while the heat dissipation effect is ensured.

For obtaining good leakproofness, prevent that the grass bits dust from getting into motor 2 and causing the damage, seted up the opening on holding the chamber in this embodiment, make 60 tip of horizontal segment, also be the air inlet end of heat dissipation wind channel 6, with hold chamber opening interference fit. The connection mode of the interference fit is stable and tight, good sealing performance can be guaranteed, and the sealing device is easy to disassemble and assemble. The fixing frame 62 can be further arranged at the end part of the arc-shaped section 61, namely the air outlet end of the heat dissipation air duct 6, the edge of the air outlet hole 10 extends outwards to form a convex periphery matched with the fixing frame 62, and the fixing frame 62 is sleeved outside the convex periphery. The connection of the arc-shaped section 61 to the open end is also good in sealing performance and convenient to connect. Furthermore, the heat dissipation duct 6 may be formed by integral molding to ensure the sealing performance, and the horizontal section 60 may be connected to the arc-shaped section 61 by clamping, welding, or bolting.

At the lawn mower during operation, because the rotation of motor 2 and operating personnel's action, lawn mower itself has great vibration and rocks, for guaranteeing the stability that heat dissipation wind channel 6 and holding chamber and exhaust vent 10 are connected, avoids heat dissipation wind channel 6 to rock, still is equipped with fastener 14 on the spiral case 13 of horizontal segment 60 both sides in this embodiment for fixed heat dissipation wind channel 6.

Example two: as shown in fig. 6 and 7, the difference between the present embodiment and the above embodiment is that the mower with the independent heat dissipation air duct provided by the present embodiment further includes a first air guiding sheet 11 disposed in the air outlet 10, one end of the first air guiding sheet 11 is flush with the edge of the air outlet 10 or extends out of the air outlet 10, an air supplementing groove 15 is disposed on the surface of the chassis 1 between the grass collecting channel 130 and the air outlet 10, and the first air guiding sheet 11 and the air supplementing groove 15 are used for enabling part of the heat dissipation air to flow into the grass collecting channel 130.

Based on the above technical features, in this embodiment, by providing the air supplementing groove 15 on the chassis 1 between the air outlet 10 and the grass collecting channel 130 and the first air guiding sheet 11 disposed in a matching manner, when the heat dissipating air flows to the air outlet 10, under the action of the first air guiding sheet 11, part of the air flow flows out from the air outlet 10 between the first air guiding sheet 11 and the air supplementing groove 15, and under the rotation action of the blade 7, the part of the heat dissipating air flows into the grass collecting channel 130 from the air supplementing groove 15. In the prior art, the grass collecting rate is low due to the fact that the blade 7 is difficult to suck air from the outside when rotating in the low gear state, partial heat dissipation air is supplemented into the grass collecting channel 130 through the arrangement of the first air guide pieces 11 and the air supplementing grooves 15, and the grass collecting rate of the mower during low gear working can be effectively improved.

In this embodiment, a second air guiding sheet 12 perpendicular to the first air guiding sheet 11 is further disposed in the air outlet 10. Therefore, the air outlet 10 can be divided into a plurality of smaller air outlets 10, the air flow speed is increased to a certain extent, and air supplement in the grass collecting channel 130 is facilitated. Meanwhile, the diffusion of the heat dissipating air flowing out from the air outlet 10 between the first air guiding sheet 11 and the air supplementing slot 15 can be reduced, so that the heat dissipating air is fully supplemented into the grass collecting channel 130.

Therefore, the mower provided by the embodiment can avoid grass dust and water mist from entering the motor 2 to damage the motor 2, and can supplement partial heat dissipation air into the grass collecting channel 130 to improve the grass collecting rate of the mower in the low-gear working state.

The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications within the scope of the present invention by those skilled in the art are covered by the present invention.

Claims

1. A lawnmower with an independent cooling air duct, comprising a chassis (1), a motor (2), a motor seat (3) and a motor support plate (4), the chassis (1) being provided with a volute (13) , the end of the output shaft of the motor (2) is fixedly connected with a blade (7), the motor seat (3) is connected with the motor support plate (4) to form an accommodation cavity, and it is characterized in that it also includes a cooling air duct (6). ), the air inlet of the cooling air duct (6) is sealed with the accommodating cavity, the air outlet of the cooling air duct (6) is led to the outside of the volute (13), and the outlet of the cooling air duct (6) The vent is down.

2 . The lawn mower with independent cooling air ducts according to claim 1 , wherein the cross-sectional area of the cooling air ducts ( 6 ) gradually increases along the airflow direction. 3 .

3. The lawnmower with an independent cooling air duct according to claim 2, wherein the chassis (1) at the front end of the volute (13) is provided with an air outlet (10), and the cooling air The air outlet of the duct (6) is connected with the air outlet hole (10).

4. The lawnmower with independent cooling air ducts according to claim 3, wherein the cooling air duct (6) comprises a horizontal section (60) and an arcuate section (61), and the horizontal section ( 60) is provided above the volute (13), the arc-shaped section (61) is arranged from top to bottom in contact with the volute (13), and the arc of the arc-shaped section (61) is the same as that of the volute (13). ) to match the radian of the outer surface.

5 . The lawn mower with independent cooling air ducts according to claim 4 , wherein the accommodating cavity is provided with an opening, and the end of the horizontal section ( 60 ) is in an interference fit with the opening. 6 .

6 . The lawnmower with independent cooling air ducts according to claim 4 , wherein a fixed frame ( 62 ) is provided at the end of the arc-shaped section ( 61 ), and the air outlet hole ( 10 ) has a The edge extends outward to form a convex enclosure matched with the fixing frame (62), and the fixing frame (62) is sleeved outside the convex enclosure.

7 . The lawn mower with independent cooling air ducts according to claim 4 , wherein the horizontal section ( 60 ) and the arc section ( 61 ) are integrally formed. 8 .

8. The lawnmower with independent cooling air ducts according to claim 4, wherein the volutes (13) on both sides of the horizontal section (60) are provided with clips (14) for Fix the cooling air duct (6).

9. The lawnmower with independent cooling air ducts according to any one of claims 3 to 8, wherein the air outlet hole (10) is provided with a first air guide sheet (11), so One end of the first air guide piece (11) is flush with the edge of the air outlet (10) or protrudes from the air outlet (10), and the inner surface of the volute (13) forms a grass collecting channel (130). ), an air supply groove (15) is provided on the surface of the chassis (1) between the grass collecting channel (130) and the air outlet (10).

10 . The lawnmower with independent cooling air ducts according to claim 9 , wherein the air outlet hole ( 10 ) is further provided with a second air guide that is perpendicular to the first air guide piece ( 11 ). 11 . sheet (12).