Power head and grass pushing machine

Abstract

The invention provides a power head and a lawn mower, and the power head comprises a seat body which is provided with an air inlet hole; the shell is connected with the seat body; the control panel is accommodated in the shell and is positioned above the air inlet hole; the volute is arranged close to the control panel; the volute is provided with an air inlet and an air outlet, and the air inlet faces the control panel, so that airflow entering from the air inlet preferentially passes through the control panel, then enters the volute from the air inlet of the volute and is exhausted from the air outlet, and heat on the control panel is taken away. Compared with the prior art, the power head can dissipate heat of the control panel, so that the situation that the power head cannot work due to the fact that the temperature of the control panel is too high is avoided.

Description

Technical Field

[0001] The invention relates to a power head and a lawn mower, belonging to the technical field of garden tools. Background Art

[0002] As an important part of the push mower, the power head usually includes a power supply part, a motor part and a control board part. The power supply part is used to provide power to the push mower, the motor part is used to drive the push mower to cut, and the control board part is used to control the work of the motor part. Therefore, the motor part and the control board part are the core parts of the push mower.

[0003] When the mower is working, the motor part and the control board part will generate heat, so it is necessary to dissipate the heat of the motor part and the control board part. Otherwise, once the temperature of the motor part and the control board part is too high, the mower will not work.

[0004] In view of this, it is necessary to improve the existing lawn mower to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a power head which can dissipate heat for a control board so that the power head will not be damaged and fail to work due to excessive temperature of the control board.

[0006] To achieve the above object, the present invention provides a power head, comprising:

[0007] A seat body, wherein an air inlet hole is formed on the seat body;

[0008] A shell connected to the seat, the shell being made of metal;

[0009] a control panel, housed in the housing and located above the air inlet; and

[0010] a volute, disposed close to the control panel;

[0011] The volute is provided with an air inlet and an air outlet, and the air inlet faces the control board so that the airflow entering from the air inlet passes through the control board first, then enters the volute from the air inlet of the volute, and then is discharged from the air outlet to take away the heat on the control board.

[0012] As a further improvement of the present invention, the shell is hollow, the air inlet is connected to the inner cavity of the shell, and the control panel is vertically arranged in the shell.

[0013] As a further improvement of the present invention, the shell is an aluminum alloy shell, and heat dissipation ribs are arranged on the outer side of the shell.

[0014] As a further improvement of the present invention, the upper surface of the control plate is substantially flush with the upper surface of the volute, so that the airflow passing through the control plate can all enter the volute from the air inlet.

[0015] As a further improvement of the present invention, the power head also includes a motor, the volute is fixed above the motor, a fan is provided in the volute, and the air outlet faces the side of the seat body.

[0016] As a further improvement of the present invention, the air inlet holes are arranged at the bottom of the base and in a straight line. The air inlet holes are located on the outside of the motor so that when the motor is running, external airflow enters the base from the side of the motor.

[0017] As a further improvement of the present invention, the power head also includes a battery pack assembly, and the control panel, the volute and the battery pack assembly are arranged in sequence and are all accommodated in the seat body.

[0018] As a further improvement of the present invention, the side of the seat is provided with an external interface electrically connected to the battery pack assembly, and the external interface is used to plug in an external power source to jointly power the power head.

[0019] The object of the present invention is to provide a lawn mower which can dissipate heat for a control panel so that the lawn mower will not fail to work due to damage caused by excessive temperature of the control panel.

[0020] To achieve the above object, the present invention provides a lawn mower, comprising:

[0021] chassis;

[0022] A power head is installed on the top of the casing;

[0023] A cutting assembly is installed at the bottom of the housing and connected to the power head to perform cutting action under the drive of the power head;

[0024] Wherein, the power head comprises:

[0025] A seat body, wherein an air inlet hole is formed on the seat body;

[0026] A shell connected to the seat, the shell being made of metal;

[0027] a control panel, housed in the housing and located above the air inlet; and

[0028] A volute, disposed close to the control panel;

[0029] The volute is provided with an air inlet and an air outlet, and the air inlet faces the control board so that the airflow entering from the air inlet passes through the control board first, then enters the volute from the air inlet of the volute, and then is discharged from the air outlet to take away the heat on the control board.

[0030] As a further improvement of the present invention, the air inlet is opened on the side of the seat body facing the casing; in the forward direction of the lawn mower, the control panel is arranged in front of the volute, and a battery pack assembly is arranged behind the volute to power the lawn mower.

[0031] The beneficial effect of the present invention is as follows: by opening an air inlet hole on the seat body, and setting the control board to be located above the air inlet hole, and setting the air inlet of the volute to face the control board, the external airflow can enter from the air inlet hole and pass through the control board first, and then enter the volute from the air inlet of the volute, and finally be discharged from the air outlet of the volute. In this way, the heat on the control board can be taken away, and the control board can be cooled, so that the power head will not be damaged and unable to work due to excessive temperature of the control board. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional view of a lawn mower of the present invention.

[0033] Figure 2 yes Figure 1 A three-dimensional view of the middle casing and power head after assembly.

[0034] Figure 3 yes Figure 2 Another perspective of the stereogram.

[0035] Figure 4 yes Figure 2 Schematic diagram after removing the top cover.

[0036] Figure 5 yes Figure 4 Exploded diagram of .

[0037] Figure 6 yes Figure 5 A three-dimensional view of the mid-chassis.

[0038] Figure 7 yes Figure 6 Another perspective view of the housing shown.

[0039] Figure 8 yes Figure 5 Stereoscopic view of the middle volute.

[0040] Fig. 9 yes Figure 5 A three-dimensional view of the power head.

[0041] Fig.10yes Fig. 9 Another perspective stereoscopic view of the power head shown.

[0042] Fig.11 It is a flow diagram of external airflow.

[0043] Fig.12 yes Fig. 9 A stereoscopic view of the power head from another perspective. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] like Figures 1 to 5 As shown, the present invention provides a push mower 100, including a push mower body 1, a power head 2, a cutting assembly and a walking assembly 4, wherein the push mower body 1 includes a housing 10 and a handle assembly 11 connected to the housing 10, and the handle assembly 11 is used by an operator to push the push mower 100. The power head 2 is installed on the top of the housing 10, and is used to provide power for the push mower 100. The power head 2 includes a motor 20.

[0046] The cutting assembly is mounted on the bottom of the housing 10 and connected to the motor 20 to perform a cutting action under the drive of the motor 20. In this embodiment, the cutting assembly includes a cutting knife 30, and the cutting knife 30 is connected to the output shaft 21 of the motor 20, so that the cutting knife 30 can be rotated under the drive of the motor 20 to perform a mowing action.

[0047] The walking assembly 4 includes a pair of front walking wheels 41 and a pair of rear walking wheels 42, which can not only support the mower body 1, but also drive the mower 100 to walk. The pair of front walking wheels 41 and the pair of rear walking wheels 42 are distributed at the four corners of the housing 10 to disperse the overall support force of the mower 100. Since the specific structures of the front walking wheels 41 and the rear walking wheels 42 can be set with reference to the prior art, they will not be described in detail here.

[0048] The present invention is mainly aimed at improving the specific structure of the housing 10 and the heat dissipation system for dissipating heat from the power head 2, so the following description will mainly describe in detail the structure of the housing 10 and the structure of the heat dissipation system.

[0049] like Figures 3 to 7As shown, the casing 10 is provided with a mounting portion 101, and the mounting portion 101 is recessed from the top of the casing 10 toward the bottom, so as to form a mounting groove 102 for mounting the power head 2 on the top of the casing 10, and a grass removal channel 103 is formed at the bottom of the casing 10, and the lower surface of the mounting portion 101 is lower than the lower surface of the grass removal channel 103, so that the grass removal channel 103 is arranged around the mounting portion 101.

[0050] That is, the mounting portion 101 is sunken for a distance relative to the top surface of the housing 10, so as to form a mounting groove 102 between the mounting portion 101 and the top of the housing 10 for mounting the power head 2. The sunken structure of the mounting portion 101 forms a grass discharge channel 103 arranged around the mounting portion 101 at the bottom of the housing 10. With such a configuration, the height at which the power head 2 is mounted on the housing 10 is reduced, thereby reducing the overall height of the corresponding power head 2 portion of the push mower 100.

[0051] Such a design can shorten the size of the packaging box when the mower 100 is packed and transported, thereby increasing the number of boxes that can be packed at one time, thereby reducing both the packaging cost and the transportation cost.

[0052] A mounting hole 104 is opened at the center of the housing 10 , and the mounting groove 102 surrounds the mounting hole 104 and is connected to the mounting hole 104 , so that the power head 2 can be accommodated in the mounting groove 102 as a whole, and the motor 20 passes through the mounting hole 104 and is fixed in the mounting hole 104 .

[0053] The mounting portion 101 is provided with a through first through hole 105, which is arranged close to the mounting hole 104 so as to lock and fix the power head 2 in the mounting groove 102. Specifically, three first through holes 105 are arranged and are evenly distributed on the circumferential outer side of the mounting hole 104; in this embodiment, the first through holes 105 are screw holes, and the power head 2 is also provided with corresponding screw holes, so that the power head 2 can be fixed to the mounting portion 101 by passing screws through the first through holes 105 and the screw holes.

[0054] Of course, in other embodiments, the fixed connection method between the power head 2 and the mounting portion 101 may also be other methods, such as snap connection, riveting, etc., which are not limited here.

[0055] The housing 10 is also provided with a grass discharge port 106 on the side facing the cutting assembly, and the grass discharge port 106 is connected with the grass discharge channel 103 so as to discharge the grass in the grass discharge channel 103 from the grass discharge port 106. Specifically, the mounting portion 101 includes a first portion 1011 and a second portion 1012, the first portion 1011 is arranged at the center of the housing 10, the mounting hole 104 is arranged in the first portion 1011, and the second portion 1012 connects the first portion 1011 with the side wall of the housing 10, so that the grass discharge channel 103 is located outside the first portion 1011 and the second portion 1012, and is separated by the second portion 1012, at which time the grass discharge channel 103 cannot form a complete ring, and from the bottom of the housing 10 (i.e., the housing 10 is viewed from an upward angle), the grass discharge port 106 is arranged at the end of the grass discharge channel 103 in the counterclockwise direction.

[0056] In this embodiment, viewed from the bottom of the casing 10, the cutter 30 rotates in a counterclockwise direction, so the grass discharge port 106 is arranged at the end of the grass discharge channel 103 in the counterclockwise direction, so that when the cutter 30 rotates, the cut grass clippings will enter the grass discharge channel 103 driven by the cutter 30 and flow along the grass discharge channel 103, and finally be discharged along the grass discharge port 106.

[0057] A sealing member 5 is provided on the side of the housing 10 facing the cutting assembly, and the sealing member 5 covers the mounting hole 104 and is fixedly connected to the housing 10 to achieve a sealed connection between the motor 20 and the housing 10. Specifically, a second through hole 51 is provided at the center of the sealing member 5, and the second through hole 51 is communicated with the mounting hole 104. The output shaft 21 of the motor 20 passes through the mounting hole 104 and the second through hole 51 and is connected to the cutting knife 30, so that when the output shaft 21 of the motor 20 rotates, the cutting knife 30 can be driven to rotate synchronously.

[0058] The housing 10 is provided with an annular wall 107 on one side facing the cutting assembly, and the sealing member 5 is received in a receiving space 108 surrounded by the annular wall 107. A third through hole 52 is provided at the outer peripheral edge of the sealing member 5, so that the sealing member 5 and the housing 10 can be locked and fixed by passing the locking member 6 through the third through hole 52. In this embodiment, the annular wall 107 is provided on the bottom of the first part 1011 of the mounting portion 101, and the receiving space 108 is formed by the annular wall 107 and the bottom wall of the first part 1011.

[0059] The setting of the seal 5 makes the sealing effect of the bottom of the lawn mower 100 better, so that during the mowing process, no grass will run into the motor 20. When the lawn mower 100 completes the mowing work and the grass is stuck at the bottom, the grass stuck at the bottom of the casing 10 can be directly washed away with a high-pressure water gun without letting the water rush into the motor 20, thereby avoiding failure of the motor 20.

[0060] like Figures 8 to 12 Combined with Figure 2 As shown, the power head 2 also includes a seat body 22 located above the casing 10, a shell 23 connected to the seat body 22, a control panel 24 accommodated in the shell 23, and a volute 25 arranged near the control panel 24. The seat body 22 is provided with an air inlet 221 on the side facing the casing 10, and the control panel 24 is correspondingly arranged above the air inlet 221. An air inlet 251 and an air outlet 252 are provided on the volute 25, and the air inlet 251 opens toward the control panel 24, so that the airflow entering from the air inlet 221 will first pass through the control panel 24, and then enter the volute 25 from the air inlet 251 of the volute 25, and finally be discharged from the air outlet 252, so that the heat on the control panel 24 can be taken away.

[0061] The air inlet holes 221 are arranged in a straight line and are arranged on the outside of the motor 20 so that the external airflow enters the seat body 22 from the side of the motor 20. The shell 23 is arranged in a hollow shape, and the air inlet holes 221 are connected to the inner cavity of the shell 23, and the control board 24 is arranged vertically in the shell 23. In this embodiment, the shell 23 is made of metal, preferably an aluminum alloy shell, because: aluminum alloy transfers heat faster, and the generated heat can be quickly discharged through the aluminum alloy shell, so that the mower 100 will not stop working due to the excessive temperature of the control board 24. In addition, heat dissipation ribs are also provided on the outside of the aluminum alloy shell to further enhance the heat dissipation effect. Of course, in other embodiments, the material of the shell 23 can also be other, which is not limited here.

[0062] The volute 25 is fixed above the motor 20, and the air inlet 251 of the volute 25 faces the control board 24, and the upper surface of the control board 24 is substantially flush with the upper surface of the volute 25, so that the airflow flowing through the control board 24 can all enter the volute 25 from the air inlet 251. A fan 250 is arranged inside the volute 25, and the air outlet 252 faces the side of the seat body 22 and is aligned with the air outlet on the power head 2. When the motor 20 is running, the airflow enters from the air inlet 221 at the bottom of the seat body 22, passes through the control board 24 inside the shell 23, and then passes through the volute 25 above the motor 20, and finally flows out from the air outlet on the side of the power head 2. This is equivalent to having airflow blowing towards the control board 24 all the time, and the control board 24 is fixed in the shell 23, and the shell 23 also has the function of heat dissipation, so that the control board 24 will not be damaged due to excessive temperature, and the power head 2 or even the entire mower 100 will not be unable to work.

[0063] The bottom of the volute 25 is provided with a mounting plate 253, and the mounting plate 253 is provided with a mounting column 254, and the mounting column 254 is provided with a locking hole 255, so that the volute 25 can be fixed above the motor 20 by passing a screw through the locking hole 255. The volute 25 is fixed above the motor 20 because: there is always airflow passing through the air inlet 251 of the volute 25, so that the motor 20 can be cooled, so that the motor 20 can work continuously and stably, and will not fail to work due to excessive temperature.

[0064] In the front-to-back direction (i.e., the forward direction of the mower 100), the control panel 24 is arranged in front of the volute 25, and a battery pack assembly 26 is arranged behind the volute 25, and the control panel 24, the volute 25 and the battery pack assembly 26 are all accommodated in the seat body 22. The side of the seat body 22 is provided with an external interface 27 electrically connected to the battery pack assembly 26, and the external interface 27 is used to plug in an external power source to jointly power the mower 100. The external power source is preferably a backpack battery, and the backpack battery can be connected in series, in parallel, or in series and parallel with the battery pack assembly 26 inside the power head 2, which is not limited here. The provision of the external interface 27 can extend the working time of the mower 100 and improve the working efficiency of the mower 100.

[0065] The battery pack assembly 26 includes a battery pack shell 261, a battery pack cover 262 that is pivotally connected to the battery pack shell 261 and snap-connected, and a battery pack (not shown) housed in a battery cavity surrounded by the battery pack shell 261 and the battery pack cover 262. A first pivoting portion 263 is provided at one end of the battery pack shell 261, and a second pivoting portion 264 is correspondingly provided at one end of the battery pack cover 262. The first pivoting portion 263 is provided between two adjacent second pivoting portions 264, and the first pivoting portion 263 and the second pivoting portion 264 are connected by a pivot axis passing through the first pivoting portion 263 and the second pivoting portion 264. With such a configuration, the battery pack cover 262 can be opened in a rotating manner relative to the battery pack shell 261, making it convenient to take out the battery pack.

[0066] A buckle 265 is provided at the other end of the battery pack shell 261, and a buckle portion 266 is provided at the other end of the battery pack cover 262. A buckle groove 267 and an abutment portion 268 protruding into the buckle groove 267 are formed in the buckle portion 266. The abutment portion 268 protrudes into the buckle groove 267 from top to bottom, so that when the battery pack cover 262 is closed, the buckle 265 can be snapped into the buckle groove 267 and abutted against the abutment portion 268 to restrict the buckle 265 in the buckle groove 267. In this way, the battery pack cover 262 and the battery pack shell 261 are fixedly connected. Of course, in other embodiments, the battery pack cover 262 and the battery pack shell 261 can also be fixedly connected in other ways, which will not be described in detail here, and no limitation is made.

[0067] In summary, the mower 100 of the present invention forms a mounting groove 102 for mounting the power head 2 at the top of the housing 10 and a grass discharge cavity 103 at the bottom of the housing 10 by setting the mounting portion 101 on the housing 10 to be concave from the top to the bottom of the housing 10, and the lower surface of the mounting portion 101 is lower than the lower surface of the grass discharge cavity 103, so that the grass discharge cavity 103 is arranged around the mounting portion 101. In this way, the grass discharge effect is not affected, and the height at which the power head 2 is mounted on the housing 10 can be reduced, so that when packing and transporting, the packaging size can be reduced, the number of one-time packing can be increased, and the packaging cost and transportation cost can be saved.

[0068] In addition, by opening an air inlet 221 on the side of the seat 22 facing the housing 10, and correspondingly setting the control board 24 above the air inlet 221, and opening an air inlet 251 and an air outlet 252 on the volute 25, and the air inlet 251 opens toward the control board 24, the airflow entering from the air inlet 221 will first pass through the control board 24, and then enter the inside of the volute 25 from the air inlet 251 of the volute 25, and finally be discharged from the air outlet 252. In this way, the heat on the motor 20 and the control board 24 can be taken away, so that the power head 2 will not be damaged or even unable to work due to the excessive temperature of the motor 20 and the control board 24.

[0069] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A power head, characterized in that: include: A seat body, wherein an air inlet hole is formed on the seat body; A shell connected to the seat, the shell being made of metal; A control panel, housed in the housing and located above the air inlet; as well as a volute, disposed close to the control panel; The volute is provided with an air inlet and an air outlet, and the air inlet faces the control board so that the airflow entering from the air inlet passes through the control board first, then enters the volute from the air inlet of the volute, and then is discharged from the air outlet to take away the heat on the control board.

2. The power head according to claim 1, characterized in that: The shell is hollow, the air inlet is connected to the inner cavity of the shell, and the control panel is vertically arranged in the shell.

3. The power head according to claim 2, characterized in that: The shell is an aluminum alloy shell, and heat dissipation ribs are arranged on the outer side of the shell.

4. The power head according to claim 1, characterized in that: The upper surface of the control plate is substantially flush with the upper surface of the volute, so that the airflow passing through the control plate can all enter the volute from the air inlet.

5. The power head according to claim 1, characterized in that: The power head also includes a motor, the volute is fixed above the motor, a fan is arranged in the volute, and the air outlet faces the side of the seat body.

6. The power head according to claim 5, characterized in that: The air inlet holes are arranged at the bottom of the base body and in a straight line. The air inlet holes are located outside the motor so that when the motor is running, external airflow enters the base body from the side of the motor.

7. The power head according to claim 1, characterized in that: The power head also includes a battery pack assembly, and the control panel, the volute and the battery pack assembly are arranged in sequence and are all accommodated in the seat body.

8. The power head according to claim 7, characterized in that: An external interface electrically connected to the battery pack assembly is provided on the side of the seat, and the external interface is used to plug in an external power source to jointly supply power to the power head.

9. A lawn mower, characterized in that: include: chassis; A power head is installed on the top of the casing; A cutting assembly is installed at the bottom of the housing and connected to the power head to perform cutting action under the drive of the power head; Wherein, the power head comprises: A seat body, wherein an air inlet hole is formed on the seat body; A shell connected to the seat, the shell being made of metal; a control panel, housed in the housing and located above the air inlet; and a volute, disposed close to the control panel; The volute is provided with an air inlet and an air outlet, and the air inlet faces the control board so that the airflow entering from the air inlet passes through the control board first, then enters the volute from the air inlet of the volute, and then is discharged from the air outlet to take away the heat on the control board.

10. The push lawn mower according to claim 9, characterized in that: The air inlet is opened on the side of the seat body facing the casing; in the forward direction of the lawn mower, the control panel is arranged in front of the volute, and a battery pack assembly is arranged behind the volute to supply power to the lawn mower.

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