Fresh air heat dissipation structure of mower

Abstract

The fresh air heat dissipation structure comprises a machine shell and a motor, a battery bin is formed in the machine shell, a first containing cavity is formed in the machine shell, a motor installation base is fixed in the first containing cavity, the motor is fixed to the motor installation base, an air inlet hole and an air outlet hole are formed in the machine shell, and an airflow channel is formed in the motor. One end of the motor is provided with an air inlet allowing airflow to enter the airflow channel, the other end of the motor is provided with an air outlet allowing airflow in the airflow channel to flow out, the motor is connected with a fan, the fan is arranged on the side, provided with the air outlet, of the motor, the motor installation base is provided with an air duct, an inlet of the air duct is communicated with the air outlet, and an outlet of the air duct is connected with the air outlet. And a ventilation hole communicated with the battery compartment and the first accommodating cavity is formed in the shell. The motor and the battery can be cooled.

Description

Technical Field

[0001] The utility model relates to the field of lawn mowers, in particular to a fresh air heat dissipation structure of a lawn mower. Background Art

[0002] A lawn mower is a common tool for maintaining lawns in outdoor lawns, gardens, and sports fields. A cutting chamber is provided at the bottom of the lawn mower, and a plurality of grass-combing teeth are provided at the front side of the bottom of the lawn mower. A blade that rotates along a horizontal plane is rotatably connected in the middle of the cutting chamber. The blade rotates at a certain height above the ground, thereby cutting off the overlong grass and making the lawn smooth and beautiful.

[0003] For example, patent CN218184053U discloses a lawn mower with waterproof effect, which includes a body, a battery holder located on the upper side of the body, a battery pack cavity provided in the battery holder for installing a battery, and a flip cover located on the battery holder.

[0004] For another example, patent CN214382070U discloses a lawn mower, which includes a casing assembly, a battery pack, a motor, a blade, a walking mechanism, a control armrest and a control device. The casing assembly includes a base, a body shell, an upper cover and a battery compartment cover. The body shell is fixedly arranged on the base to form a cavity structure with an opening facing upward; the upper cover is provided with a battery compartment with an opening facing upward; the upper cover is fixedly arranged on the body shell to cover the opening of the cavity, and the motor is fixedly arranged in the cavity, and its motor shaft extends downward out of the base; the blade is detachably fixed on the motor shaft of the motor from the middle thereof; the walking mechanism is composed of two pairs of walking tires, and the two pairs of walking tires are rotatably arranged on the left and right sides of the front of the casing assembly and the left and right sides of the rear of the base respectively; the control armrest is fixedly arranged on the rear of the base; the control armrest is provided with a switch for controlling the start and stop of the mowing operation of the lawn mower, and the switch is electrically connected to the control device; the motor is electrically connected to the control device through corresponding lines.

[0005] The above-mentioned existing lawn mower has the problem of motor overheating during mowing operation, and the battery holder can be installed with one or more battery cells, and the battery holder connects multiple battery cells in series to increase the voltage. When the power is high, the battery will heat up, and the existing lawn mower cannot dissipate heat from the battery well. Utility Model Content

[0006] Based on the problem that the motor and battery of the above-mentioned lawn mower may overheat during operation, the utility model provides a fresh air heat dissipation structure of the lawn mower which is convenient for dissipating heat from the motor.

[0007] The technical solution adopted by the utility model to solve the above technical problems is: a fresh air heat dissipation structure of a lawn mower comprises a casing and a motor, a battery compartment for loading a battery is formed on the casing, a first accommodating cavity is arranged in the casing, a motor mounting seat is fixed in the first accommodating cavity, the motor is fixed on the motor mounting seat and is used to drive the lawn mowing element to rotate, an air inlet and an air outlet connected to the first accommodating cavity are arranged on the casing, an air flow channel for air flow circulation and heat dissipation is arranged in the motor, an air inlet for air flow to enter the air flow channel is arranged at one end of the motor, and an air outlet for air flow to enter the air flow channel is arranged at the other end of the motor An air outlet through which the air in the air flow channel flows out, the motor is connected to a fan, the fan is arranged on a side of the motor having the air outlet to provide negative pressure suction, an air duct is arranged on the motor mounting seat, the inlet of the air duct is opposite to the fan and connected to the air outlet, the outlet of the air duct is connected to the air outlet, when the fan is driven to rotate by the motor, a heat dissipation air path is formed in the casing, which enters the first accommodating cavity from the air inlet, enters the air flow channel through the air inlet, flows out of the air flow channel from the air outlet, and is discharged from the casing from the air outlet through the air duct, and the casing is provided with ventilation holes connecting the battery compartment and the first accommodating cavity.

[0008] A further preferred technical solution of the present invention is that the battery compartment is located on the heat dissipation air path.

[0009] A further preferred technical solution of the utility model is: the air inlet is arranged on the side of the casing, and the air outlet is arranged on the bottom of the casing.

[0010] A further preferred technical solution of the utility model is: air inlets are provided on both sides of the casing, the air inlets on both sides are respectively located on both sides of the battery compartment and opposite to the battery compartment, and the motor is located at a lower position on the rear side of the battery compartment.

[0011] A further preferred technical solution of the utility model is: the air flow channel is formed by the internal gap of the motor.

[0012] A further preferred technical solution of the utility model is that the air inlet and the air outlet are grid holes.

[0013] A further preferred technical solution of the utility model is: the fan is a centrifugal fan, and the inlet of the air duct is located on one side of the fan in the radial direction and opposite to the fan.

[0014] A further preferred technical solution of the utility model is: the motor mounting base includes a base body, a connecting cover and an upper cover, the base body is fixedly installed in the first accommodating chamber, the connecting cover is fixed on the base body, a fan accommodating chamber and an air duct are formed between the connecting cover and the base body, the fan is placed in the fan accommodating chamber, the air duct is located on one side of the fan accommodating chamber and the inlet of the air duct is connected to the fan accommodating chamber, a sleeve extending upward is provided on the top of the connecting cover, the sleeve is connected to the fan accommodating chamber, one end of the motor with an air outlet is inserted into the sleeve, the upper cover is detachably fixedly connected to the connecting cover and is sleeved on one end of the motor with an air inlet, and the upper cover is provided with air holes for the airflow in the first accommodating chamber to enter the airflow channel.

[0015] A further preferred technical solution of the utility model is: a volute-shaped flow guide channel arranged around the fan is provided in the fan accommodating chamber, and the inlet of the air duct is connected to the flow guide channel.

[0016] A further preferred technical solution of the utility model is: the casing includes a chassis, a body shell and a battery holder, the body shell is fixed on the upper side of the chassis, and the first accommodating cavity is formed between the body shell and the chassis, the motor mounting base is fixed on the chassis, the battery holder is fixed on the top of the body shell, and a battery compartment with an opening facing upward is formed on the battery holder, the battery compartment extends downward and is inserted into the first accommodating cavity, a battery compartment cover is hinged on the battery holder, and the battery compartment cover covers the opening of the battery compartment.

[0017] Compared with the prior art, the utility model has the advantages that an air inlet and an air outlet connected to the first accommodating chamber are arranged on the casing of the lawn mower, an air flow channel is arranged in the motor, an air inlet for air flow to enter the air flow channel is arranged at one end of the motor, and an air outlet for air flow in the air flow channel to flow out is arranged at the other end of the motor, a fan is connected to the motor, the fan is arranged on a side of the motor with the air outlet to provide negative pressure suction, an air duct connected to the air outlet is arranged on the motor mounting seat, and the outlet of the air duct is connected to the air outlet, when the lawn mower is operating, the motor is started, the fan is driven to rotate by the motor, and a fan is driven to rotate in the casing A heat dissipation air path is formed, which enters the first accommodating cavity through the air inlet, enters the air flow channel through the air inlet, flows out of the air flow channel from the air outlet, and is discharged from the housing from the air outlet through the air duct, so that the air flow passes through the inside of the motor to dissipate the heat of the motor. In addition, the housing is provided with a ventilation hole connecting the battery compartment and the first accommodating cavity. When the air flow flows through the first accommodating cavity along the heat dissipation air path, the air in the first accommodating cavity is exchanged to take away the hot air in the first accommodating cavity. The hot air in the battery compartment is exchanged with the air in the first accommodating cavity through the ventilation hole to achieve a certain heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 The figure is a schematic diagram of the overall structure of the lawn mower;

[0020] Figure 2 is a schematic diagram of the bottom of the lawn mower;

[0021] Figure 3 This is a disassembled diagram of the battery compartment cover and the lawn mower housing;

[0022] Figure 4 This is a disassembled diagram of the battery holder and the body shell;

[0023] Figure 5 This is a disassembled diagram of the chassis and the body shell;

[0024] Figure 6 This is a disassembled diagram of the motor mount and chassis;

[0025] Figure 7 is a cutaway schematic diagram of a lawn mower;

[0026] Figure 8 It is a schematic diagram of the overall structure of the motor mounting base;

[0027] Fig. 9 It is a longitudinal section diagram of the motor mounting base;

[0028] Fig.10 This is a schematic diagram of the transverse section of the motor mounting base.

[0029] In the figure: 1. casing; 2. air inlet; 3. air outlet; 4. mowing element; 5. battery compartment cover; 6. battery; 7. battery compartment; 8. battery holder; 9. body shell; 10. chassis; 11. socket; 12. first accommodating chamber; 13. motor mounting seat; 14. heat dissipation air path; 15. ventilation hole; 16. fan accommodating chamber; 17. air duct; 18. upper cover; 19. air hole; 20. sleeve; 21. connecting cover; 22. seat; 23. motor; 24. air flow channel; 25. air inlet; 26. air outlet; 27. fan; 28. guide channel; 29. ​​connecting port. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0031] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0032] like Figure 1-Figure 10 As shown, the fresh air heat dissipation structure of the lawn mower includes a housing 1 and a motor 23. The housing 1 is formed with a battery compartment 7 for loading a battery 6. The housing 1 is provided with a first accommodating cavity 12. A motor mounting seat 13 is fixed in the first accommodating cavity 12. The motor 23 is fixed on the motor mounting seat 13 to drive the mowing element 4 to rotate. The mowing element 4 can be a blade or a mowing rope. One or more battery compartments 7 for loading a battery 6 can be formed on the housing 1.

[0033] Figure 1-Figure 5 As shown, preferably, the casing 1 includes a chassis 10, a body shell 9 and a battery holder 8, the body shell 9 is fixed on the upper side of the chassis 10, and the first accommodating cavity 12 is formed between the body shell 9 and the chassis 10, the motor mounting seat 13 is fixed on the chassis 10, the battery holder 8 is fixed on the top of the body shell 9, and a battery compartment 7 with an opening facing upward is formed on the battery holder 8, the battery compartment 7 extends downward and is inserted into the first accommodating cavity 12, a battery compartment cover 5 is hinged on the battery holder 8, the battery compartment cover 5 covers the opening of the battery compartment 7, the battery compartment cover 5 can be rotated to open the battery 6 for loading or removing, and a socket 11 is provided on the top of the body shell 9 for the battery compartment 7 to be inserted into the first accommodating cavity 12.

[0034] Figure 1 , Figure 2 As shown, the housing 1 is provided with an air inlet 2 and an air outlet 3 which are connected to the first accommodating cavity 12. Preferably, the air inlet 2 is provided at the side of the housing 1, and the air outlet 3 is provided at the bottom of the housing 1, so that the housing 1 takes in air from the side and discharges air from the bottom. Specifically, the air inlet 2 is provided between the body shell 9 and the battery holder 8, and the air outlet 3 is provided at the bottom of the chassis 10.

[0035] Preferably, the air inlet 2 and the air outlet 3 are grid holes, which can block external debris to a certain extent and prevent the external debris from being sucked into the casing 1.

[0036] Fig. 9As shown, the motor 23 is provided with an air flow channel 24 for air to circulate inside, one end of the motor 23 is provided with an air inlet 25 for air to enter the air flow channel 24, and the other end of the motor 23 is provided with an air outlet 26 for the air flow in the air flow channel 24 to flow out, and a fan 27 is installed on the motor 23. The fan 27 is arranged on the side of the motor 23 with the air outlet 26 to provide negative pressure suction, so that when the fan 27 rotates, external air can enter the motor 23 from the side of the air inlet 25 of the motor 23, and be discharged from the air outlet 26 after passing through the air flow channel 24 in the motor 23.

[0037] Preferably, the air flow channel 24 is formed by combining the internal gaps of the motor 23 .

[0038] The motor mounting seat 13 is provided with an air duct 17 , the inlet of the air duct 17 is opposite to the fan 27 and connected to the air outlet 26 , and the outlet of the air duct 17 is connected to the air outlet 3 .

[0039] Preferably, the fan 27 is a centrifugal fan, and the inlet of the air duct 17 is located on one side of the fan 27 in the radial direction and opposite to the fan 27 .

[0040] Figure 8-Figure 10 As shown, preferably, the motor mounting seat 13 includes a seat body 22, a connecting cover 21 and an upper cover 18, the seat body 22 is fixedly connected to the bottom of the first accommodating chamber 12 by screws, the connecting cover 21 is fixed to the seat body 22 by screws, a fan accommodating chamber 16 and an air duct 17 are formed between the connecting cover 21 and the seat body 22, a fan 27 is arranged in the fan accommodating chamber 16, the air duct 17 is located on one side of the fan accommodating chamber 16 and the inlet of the air duct 17 is connected to the fan accommodating chamber 16, a sleeve 20 extending upward is provided on the top of the connecting cover 21, the sleeve 20 has an upward opening, and the lower end of the sleeve 20 is connected to the fan accommodating chamber 16 through a connecting port 29. The motor 23 is installed in the sleeve 20, and one end of the motor 23 having the air outlet 26 is inserted into the sleeve 20 so that the air outlet 25 at the lower end of the motor 23 is opposite to the connecting port 29. The upper cover 18 is fixedly connected to the connecting cover 21 by screws. The upper cover 18 is located above the motor 23 and is sleeved on one end of the motor 23 having the air inlet 25. The upper cover 18 is provided with an air hole 19 for the air flow in the first accommodating chamber 12 to enter the air flow channel 24. The motor shaft of the motor 23 passes through the connecting port 29 to be connected with the fan 27, and the air flow discharged from the air flow channel 24 enters the fan accommodating chamber 16 from the connecting port 29, and then enters the air duct 17 from the fan accommodating chamber 16.

[0041] Preferably, a volute-shaped guide channel 28 surrounding the fan 27 is provided in the fan accommodating chamber 16 , and the inlet of the air duct 17 is connected to the guide channel 28 . The volute-shaped guide channel 28 facilitates the discharge of wind in the airflow channel 24 .

[0042] Figure 7As shown, when the lawn mower is operating, the motor 23 is started, and the fan 27 is driven to rotate by the motor 23, forming a heat dissipation path 14 in the casing 1, which enters the first accommodating cavity 12 from the air inlet 2, enters the air flow channel 24 through the air inlet 25, flows out of the air flow channel 24 from the air outlet 26, and is discharged from the casing 1 from the air outlet 3 through the air duct 17, so that the air flow passes through the inside of the motor 23 to dissipate the heat of the motor 23.

[0043] The housing 1 is provided with a ventilation hole 15 connecting the battery compartment 7 and the first accommodating cavity 12. The ventilation hole 15 is set on the wall of the battery compartment 7 inserted into the first accommodating cavity 12. When the airflow flows through the first accommodating cavity 12 along the heat dissipation air path 14, the air in the first accommodating cavity 12 is exchanged to take away the hot air in the first accommodating cavity 12. The hot air in the battery compartment 7 is exchanged with the air in the first accommodating cavity 12 through the ventilation hole 15 to achieve a certain heat dissipation effect.

[0044] Preferably, the battery compartment 7 inserted into the first accommodating cavity 12 is located on the heat dissipation air path 14. When the air flow flows through the first accommodating cavity 12 along the heat dissipation air path 14, the heat in the battery compartment 7 is directly taken away through the ventilation holes 15, thereby achieving the best heat dissipation effect.

[0045] Specifically, air inlet holes 2 are provided on both sides of the casing 1, and the air inlet holes 2 on both sides are respectively located on both sides of the battery compartment 7 and opposite to the battery compartment 7. The motor 23 is located at a lower position on the rear side of the battery compartment 7. When the external air enters the first accommodating cavity 12 through the air inlet holes 2, it will first contact the battery compartment 7 for heat dissipation, and then flow backward along the heat dissipation air path 14 into the battery 6. In addition, the air inlet on both sides enables two heat dissipation air paths 14 to be formed in the casing 1 to dissipate heat at the same time, so as to achieve a better heat dissipation effect.

[0046] The above is an introduction to the fresh air heat dissipation structure of the lawn mower provided by the utility model. This article uses specific examples to illustrate the principle and implementation of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A fresh air heat dissipation structure of a lawn mower, comprising a housing and a motor, wherein a battery compartment for loading a battery is formed on the housing, a first accommodating cavity is provided in the housing, a motor mounting seat is fixed in the first accommodating cavity, and the motor is fixed on the motor mounting seat for driving a lawn mowing element to rotate, characterized in that: The casing is provided with an air inlet and an air outlet connected with the first accommodating cavity, the motor is provided with an air flow channel for air circulation and heat dissipation, one end of the motor is provided with an air inlet for air entering the air flow channel, and the other end of the motor is provided with an air outlet for air in the air flow channel to flow out, the motor is connected with a fan, the fan is arranged on a side of the motor with the air outlet to provide negative pressure suction, the motor mounting seat is provided with an air duct, the inlet of the air duct is opposite to the fan and connected with the air outlet, the outlet of the air duct is connected with the air outlet, when the fan is driven to rotate by the motor, a heat dissipation air path is formed in the casing, the air enters the first accommodating cavity through the air inlet, enters the air flow channel through the air inlet, flows out of the air flow channel from the air outlet, and is discharged from the casing from the air outlet through the air duct, and the casing is provided with a ventilation hole connecting the battery compartment and the first accommodating cavity.

2. The fresh air heat dissipation structure of the lawn mower according to claim 1, characterized in that: The battery compartment is located on the heat dissipation air path.

3. The fresh air heat dissipation structure of the lawn mower according to claim 1, characterized in that: The air inlet is arranged at the side of the casing, and the air outlet is arranged at the bottom of the casing.

4. The fresh air heat dissipation structure of the lawn mower according to claim 2, characterized in that: Air inlets are provided on both sides of the casing, and the air inlets on both sides are respectively located on both sides of the battery compartment and opposite to the battery compartment, and the motor is located at a lower position on the rear side of the battery compartment.

5. The fresh air heat dissipation structure of the lawn mower according to claim 1, characterized in that: The air flow channel is formed by the internal gap of the motor.

6. The fresh air heat dissipation structure of the lawn mower according to claim 1, characterized in that: The air inlet and outlet holes are grid holes.

7. The fresh air heat dissipation structure of the lawn mower according to claim 1, characterized in that: The fan is a centrifugal fan, and the inlet of the air duct is located on one side of the fan in the radial direction and is opposite to the fan.

8. The fresh air heat dissipation structure of the lawn mower according to claim 7, characterized in that: The motor mounting base includes a base body, a connecting cover and an upper cover, the base body is fixedly installed in a first accommodating chamber, the connecting cover is fixed on the base body, a fan accommodating chamber and an air duct are formed between the connecting cover and the base body, the fan is placed in the fan accommodating chamber, the air duct is located on one side of the fan accommodating chamber and the inlet of the air duct is connected to the fan accommodating chamber, a sleeve extending upward is provided on the top of the connecting cover, the sleeve is connected to the fan accommodating chamber, one end of the motor with an air outlet is inserted into the sleeve, the upper cover is detachably fixedly connected to the connecting cover and is sleeved on one end of the motor with an air inlet, and an air hole is provided on the upper cover for the airflow in the first accommodating chamber to enter the airflow channel.

9. The fresh air heat dissipation structure of the lawn mower according to claim 8, characterized in that: A volute-shaped flow guiding channel which is arranged around the fan is arranged in the fan accommodating chamber, and the inlet of the air duct is connected to the flow guiding channel.

10. The fresh air heat dissipation structure of the lawn mower according to claim 1, 2 or 4, characterized in that: The casing includes a chassis, a body shell and a battery holder, the body shell is fixed on the upper side of the chassis, and the first accommodating cavity is formed between the body shell and the chassis, the motor mounting seat is fixed on the chassis, the battery holder is fixed on the top of the body shell, and a battery compartment with an opening upward is formed on the battery holder, the battery compartment extends downward and is inserted into the first accommodating cavity, a battery compartment cover is hinged on the battery holder, and the battery compartment cover covers the opening of the battery compartment.

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