Power head

Abstract

The invention provides a power head which comprises a machine shell, a battery pack cavity and a motor, a containing cavity for containing the battery pack cavity and the motor is formed in the machine shell, the battery pack cavity is used for containing a battery pack, and the motor is located below the battery pack cavity and provided with a fan. An air inlet is formed in the top of the machine shell, an air outlet is formed in the bottom of the machine shell, the air outlet is close to the fan, a guide air duct is arranged at the air inlet, and the guide air duct is used for guiding airflow entering from the air inlet into the containing cavity, sinking into the motor along the battery pack cavity and exhausting from the air outlet under the action of the fan. Compared with the prior art, air entering from the air inlet is exhausted from the air outlet after passing through the battery pack cavity and the motor by utilizing the guide air duct arranged in the power head, so that the heat dissipation problem of the battery pack and the motor is solved.

Description

Technical Field

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

[0002] Existing power heads usually install centrifugal fans under the motor to dissipate heat from the motor. However, due to the excessive emphasis on the motor, the heat dissipation of other components is ignored. For example, the battery pack will generate a lot of heat during long-term operation, and ordinary battery packs will dissipate heat unevenly when using large loads, and then temperature protection will occur before the current is fully discharged, affecting the efficiency and service life of the power head.

[0003] In view of this, it is necessary to improve the existing power head to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a power head, which provides a guide air duct so that the airflow entering from the air inlet flows through the battery pack cavity and the motor, so as to dissipate heat for the battery pack and the motor at the same time.

[0005] To achieve the above object, the present invention provides a power head, comprising:

[0006] A housing, wherein a storage cavity is provided inside the housing;

[0007] A battery pack cavity is received in the receiving cavity to receive the battery pack;

[0008] A motor is housed in the storage cavity and is located below the battery pack cavity, and the motor is provided with a fan;

[0009] Among them, the casing is provided with an air inlet on the top and an air outlet on the bottom. The air outlet is arranged close to the fan. A guide air duct is provided at the air inlet. The guide air duct is used to guide the airflow entering from the air inlet into the storage cavity, and sink along the battery pack cavity into the motor, and be discharged from the air outlet under the action of the fan.

[0010] As a further improvement of the present invention, the power head also includes a first air guide plate, one end of which is fixed to the top of the casing, and the other end extends into the storage cavity and is spaced apart from the inner wall of the casing, and the guide air duct is formed between the first air guide plate and the inner wall of the casing.

[0011] As a further improvement of the present invention, the first air guide plate includes a first air guide vane partially covered above the shell and a second air guide vane extending from the first air guide vane into the storage cavity, the first air guide vane and the second air guide vane are perpendicular to each other, and the guide air duct is formed between the second air guide vane and the inner side wall of the shell.

[0012] As a further improvement of the present invention, the first air guide plate is provided with a shielding edge extending toward the outside of the casing, and when the first air guide plate cover is arranged on the top of the casing, the shielding edge covers the air inlet.

[0013] As a further improvement of the present invention, the power head further includes a prefabricated plate, and the prefabricated plate is arranged between the battery pack cavity and the second air guide plate to fixedly connect the battery pack cavity and the second air guide plate.

[0014] As a further improvement of the present invention, a ventilation area is provided between the prefabricated panel and the battery pack cavity, and the ventilation area is connected with the guide air duct. When the airflow enters the guide air duct from the air inlet, it flows into the ventilation area along the second air guide plate, and then enters the battery pack cavity through the ventilation area.

[0015] As a further improvement of the present invention, the battery pack cavity includes a first battery pack cavity and a second battery pack cavity arranged in parallel with each other, a gap is left between the first battery pack cavity and the second battery pack cavity, and airflow sinks into the motor along the gap.

[0016] As a further improvement of the present invention, the battery pack cavity is tilted, including a relatively low first end and a second end tilted upward from the first end, and the motor is arranged below the second end.

[0017] As a further improvement of the present invention, the motor also includes a motor body, the fan is connected to the motor body and is located below the motor body, and the fan is opposite to the air outlet, so that the airflow sinking into the motor can be discharged from the air outlet under the action of the fan.

[0018] As a further improvement of the present invention, the power head is further provided with a second air guide plate, which is connected between the fan and the air outlet and is used to guide the airflow flowing out of the motor to be discharged through the air outlet.

[0019] The beneficial effects of the present invention are as follows: the power head of the present invention, by setting an air inlet and an air outlet, allows the air flow to enter the storage cavity from the air inlet to dissipate the heat of the power head; at the same time, a guide air duct is provided, so that the air flow entering the storage cavity is discharged from the air outlet after passing through the battery pack cavity and the motor under the action of the guide air duct, so as to dissipate the heat of the battery pack and the motor at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of a power head in accordance with a preferred embodiment of the present invention.

[0021] Figure 2 yes Figure 1 Exploded view of the mid-chassis.

[0022] Figure 3 yes Figure 1 Exploded view of the first shell.

[0023] Figure 4 yes Figure 3 A partial enlarged view of .

[0024] Figure 5 yes Figure 2 Exploded view after removing the casing.

[0025] Figure 6 yes Figure 5 Schematic diagram of the structure of the battery pack cavity.

[0026] Figure 7 yes Figure 2 Exploded view of the battery pack cavity and motor.

[0027] Figure 8 yes Figure 1 Exploded view of the middle cover and mounting straps.

[0028] Fig. 9 yes Figure 1 A schematic structural diagram of the power head shown in another angle.

[0029] Fig.10 yes Fig. 9 Exploded view of the center flap locking mechanism. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figures 1 to 3 As shown, the present invention discloses a power head 100, including a housing 1, a battery pack cavity 2, and a motor 3. The housing 1 is provided with a storage cavity 11, and the battery pack cavity 2 and the motor 3 are both stored in the storage cavity 11 and arranged up and down, and the motor 3 is located below the battery pack cavity 2.

[0032] The housing 1 is provided with an air inlet 15 at the top and an air outlet 16 at the bottom. The air outlet 16 is arranged close to the motor 3. A guide air duct (indicated by arrows in the attached drawings) is arranged at the air inlet 15. The guide air duct is used to guide the airflow entering from the air inlet 15 into the storage cavity 11, and sink along the battery pack cavity 2 into the motor 3, and be discharged from the air outlet under the action of the motor 3. In this way, an air path is formed by the flowing air, and the air passes through the battery pack cavity 2 and the motor 3 under the action of the guide air duct, so as to cool and dissipate the heat of the battery pack cavity 2 and the motor 3 at the same time.

[0033] Specifically, the casing 1 includes a shell 12 and a cover 13, the shell 12 includes a first shell 121 and a second shell 122 of the same structure, the first shell 121 and the second shell 122 are assembled with each other and arranged around the outside of the power head 100, the cover 13 is arranged above the shell 12, and is rotatably connected to the shell 12, and can be opened or closed relative to the shell 12.

[0034] The housing 1 also includes a base 14, which is arranged below the shell 12 and fixedly connected to the shell 12. The cover 13, the shell 12 and the base 14 are assembled with each other to form a storage cavity 11 for accommodating the battery pack cavity 2 and the motor 3. The air inlet 15 is arranged on the top of the shell 12, and the air outlet 16 is arranged on the base 14.

[0035] The power head 100 also includes an air guide plate, which cooperates with the battery pack cavity 2 and the motor 3 to form a complete guide air duct, so that the air flow enters from the air inlet 15, passes through the battery pack cavity 2 and the motor 3, and is discharged from the air outlet 16 to dissipate heat from the battery pack cavity 2 and the motor 3.

[0036] Combination Figure 8 As shown, the air guide plate includes a first air guide plate 51 and a second air guide plate 52, one end of the first air guide plate 51 is fixed to the top of the housing 1, and the other end extends into the storage cavity 11 and is spaced apart from the inner side wall of the housing 1, and the guide air duct is formed between the first air guide plate 51 and the inner side wall of the housing 1. In other words, the first air guide plate 51 is fixed between the cover 13 and the housing 12. Preferably, there are two first air guide plates 51, which are respectively arranged on both sides of the power head 100.

[0037] Combination Figure 4 and Figure 5As shown, the first air guide plate 51 includes a first air guide plate 511 partially covering the shell 12 and a second air guide plate 512 extending from the first air guide plate 511 into the storage cavity 11, the first air guide plate 511 and the second air guide plate 512 are perpendicular to each other, and the guide air duct is formed between the second air guide plate 512 and the inner side wall of the shell 1.

[0038] In this embodiment, a reserved hole 5110 is provided on the first air guide plate 511 , and a reserved column (not shown) is correspondingly provided on the cover body 13 . The reserved column is received in the reserved hole 5110 to achieve a fixed connection between the cover body 13 and the first air guide plate 511 .

[0039] The first air guide piece 511 is provided with a shielding edge 5111 extending toward the outside of the housing 12, and when the first air guide piece 511 is covered on the top of the housing 12, the shielding edge 5111 covers the air inlet 15. Preferably, the air inlet 15 is configured as a shutter, and the first air guide piece 511 is further provided with a limiting strip 5112, and when the first air guide piece 511 is covered on the top of the housing 12, the limiting strip 5112 is located outside the air inlet 15.

[0040] The power head 100 further includes a prefabricated plate 26 , which is disposed between the battery pack cavity 2 and the second air guide plate 512 to fixedly connect the battery pack cavity 2 and the second air guide plate 512 .

[0041] A ventilation area 260 is provided between the prefabricated plate 26 and the battery pack cavity 2, and the ventilation area 260 is connected to the guide air duct. When the airflow enters the guide air duct from the air inlet 15, it flows into the ventilation area 260 along the second air guide piece 512, and then enters the battery pack cavity 2 through the ventilation area 260. Preferably, a rib (not shown) is provided on the shell 12. When the shell 12 is fixed to the cover 13, the rib is tightly combined with the second air guide piece 512, so that the airflow can only sink along the second air guide piece 512 and enter the ventilation area 260.

[0042] Combination Figure 6 and Figure 7 As shown, the battery pack cavity 2 is used to accommodate a battery pack (not shown), including a first battery pack cavity 21 and a second battery pack cavity 22 arranged in parallel with each other, and a gap 20 is left between the first battery pack cavity 21 and the second battery pack cavity 22, and the airflow sinks into the motor 3 along the gap 20. In this way, the airflow passes through the battery pack cavity 2 to dissipate the heat of the battery pack in the battery pack cavity 2. Of course, in other embodiments, the number of battery pack cavities 2 can be adjusted according to actual needs, and is not limited here.

[0043] Specifically, the battery pack cavity 2 is tilted, including a relatively low first end 24 and a second end 25 tilted upward from the first end 24, and the motor 3 is arranged below the second end 25. In other words, the power head 100 is tilted as a whole to completely accommodate the battery pack cavity 2. At the same time, the tilted setting makes the inside of the power head 100 more compact to a certain extent, improving the space utilization rate; moreover, the air flow channel can also be set by arranging different components at different positions.

[0044] The motor 3 includes a motor body 31 and a fan 32 . The fan 32 is connected to the motor body 31 and is located below the motor body 31 . The fan 32 faces the air outlet 16 , so that the airflow sinking into the motor 3 can be discharged from the air outlet 16 under the action of the fan 32 .

[0045] The second air guide plate 52 is connected between the fan 32 and the air outlet 16 , and is used to guide the airflow flowing out of the motor 3 to be discharged to the air outlet 16 .

[0046] See also Fig. 9 and Fig.10 As shown, the power head 100 also includes a flip cover locking device 10, which includes a flip cover 7 and an elastic member 8 arranged between the cover body 13 and the flip cover 7 and capable of being deformed under the action of an external force; preferably, two elastic members 8 are provided and are spaced apart from each other.

[0047] One end of the flip cover 7 is pivotally connected to the cover body 13, and the other end is snap-connected with the shell 12; the flip cover 7 has a locked state and an activated state. When the flip cover 7 is in the locked state, the elastic member 8 is in a free state, the flip cover 7 is snap-connected and fixed with the shell 12, and the cover body 13 is in a closed state; when the flip cover 7 is in the activated state, the elastic member 8 is compressed, the flip cover 7 is snap-connected with the shell 12 and can be rotated relative to the cover body 13, so that the cover body 13 can be opened relative to the shell 12. In other words, the flip cover 7 is used to lock the cover body 13 and the shell 12, so that the housing 1 is kept in a closed state under normal conditions, and the cover body 13 can be opened when necessary to expose the inside of the housing 1. Preferably, when the cover body 13 is opened, the battery pack cavity 2 is exposed to replace the battery pack.

[0048] In this embodiment, when the flip cover 7 is in an activated state, the cover body 13 is not in contact with the housing 12 and can be clearly observed so as to be locked in time.

[0049] There is an active area between the cover body 13 and the flip cover 7. When the flip cover 7 is pushed to move toward the cover body 13, the elastic member 8 is squeezed and deformed, and the flip cover 7 can rotate relative to the cover body 13. When the flip cover 7 is released, the elastic member 8 is reset, and the flip cover 7 is reset under the action of the rebound force. Specifically, the active area is the distance that the elastic member 8 is pressed and compressed. Of course, in other embodiments, other locking methods can also be selected, such as providing an extended locking block on the flip cover 7, and rotating the flip cover 7 to switch between the locked and activated states. In the locked state, the flip cover 7 is fixed on the cover body 13, and the locking block cooperates with the shell 12 to fix the cover body 13 to the shell 12. There is no limitation to this.

[0050] In this embodiment, an extension area 74 is provided outwardly from the top of the flip cover 7, and the extension area 74 serves as a push button. When in use, the finger surface is placed on the cover plate 71, the finger tip abuts against the extension area 74, and the extension area 74 is pushed upward to move the flip cover 7 within the active area.

[0051] The cover body 13 is provided with a limit block 131, and the flip cover 7 is correspondingly provided with a limit member 70. The two ends of the elastic member 8 are respectively mounted on the limit block 131 and the limit member 70, and can be deformed along with the movement of the flip cover 7 in the activity area. Of course, in other embodiments, the elastic member 8 can be directly fixed to the housing 12 and the cover body 13 by fixing accessories such as screws, and it only needs to ensure that the elastic member 8 can be compressed / reset within a certain range, and there is no limitation on this.

[0052] The flip cover 7 includes a cover plate 71 and a connecting shaft 72 connected to the cover plate 71 . The cover plate 71 is provided with a through hole 710 . The connecting shaft 72 passes through the through hole 710 and is movably connected to the cover plate 71 , so that the cover plate 71 is pivotally connected to the cover body 13 via the connecting shaft 72 .

[0053] The cover body 13 is provided with a matching portion 132 protruding toward the cover plate 71, and the cover plate 71 is correspondingly provided with a catching portion 73, and the catching portion 73 is sleeved on the outside of the matching portion 132 to limit the connecting shaft 72 between the matching portion 132 and the catching portion 73. Preferably, two matching portions 132 are provided, and are respectively provided on both sides of two elastic members 8.

[0054] Specifically, a groove 1320 is concavely formed on the side of the matching portion 132 facing the cover plate 71. When the engaging portion 73 is sleeved on the outside of the matching portion 132, the groove 1320 and the engaging portion 73 are jointly formed to form a receiving cavity, and the connecting shaft 72 is received in the receiving cavity. An assembly groove 711 is provided on the cover plate 71, and the engaging portion 73 is received in the assembly groove 711.

[0055] In this embodiment, the engaging portion 73 is an independent component. After the connecting shaft 72 is placed in the groove 1320, the engaging portion 73 is passed through the assembly groove 711 to cooperate with the groove 1320 to achieve the fixation of the engaging portion 73 and the cover body matching portion 132, and then the connecting shaft 72 is fixed in the receiving cavity to fix the cover plate 71 with the cover body 13. Preferably, the matching portion 132 and the engaging portion 73 are each provided with a screw hole. When the matching portion 132 and the engaging portion 73 are installed, the two screw holes are aligned with each other, and the screws are passed through the screw holes to fix the matching portion 132 and the engaging portion 73. In other embodiments, the engaging portion 73 can also be set as a prefabricated part integrally formed with the flip cover 7, so that when the connecting shaft 72 is installed, the flip cover 7 and the cover body 13 are fixedly connected.

[0056] A buckle 123 is provided on one side of the housing 12 close to the cover body 13 , and a buckle 75 is correspondingly provided on the flip cover 7 . The buckle 123 cooperates with the buckle 75 to achieve a buckle connection between the flip cover 7 and the housing 12 .

[0057] See also Figure 8 As shown, a mounting groove 18 is left on the outer side of the housing 1 for accommodating a mounting belt 19. The mounting groove 18 divides the power head 100 into two parts in the vertical direction. A through groove (not shown) is provided on the top of the housing 12. The connecting member 17 located below the mounting belt 19 is used, and the connecting member 17 is passed through the through groove and fixedly connected to the cover body 13. The connecting member 17 is generally in a bent crescent shape, and a plurality of positioning holes 171 are provided on the connecting member 17. The cover body 13 is correspondingly provided with a prefabricated column 133, and the prefabricated column 133 is accommodated in the positioning hole 171 to achieve a fixed connection between the cover body 13 and the connecting member 17. In other words, the cover body 13 is fixedly connected to the mounting belt 19 through the connecting member 17. Preferably, the mounting belt 19 covers the housing 12 and the cover body 13 at the same time, and the connecting member 17 is partially accommodated in the first air guide plate 51.

[0058] In summary, the power head 100 of the present invention is provided with an air inlet 15 and an air outlet 16 on the casing 1 so that airflow enters the interior of the power head 100 to dissipate heat for the power head 100. At the same time, by providing a guide air duct, a first air guide plate 51 and a second air guide plate 52, the airflow entering the storage cavity 11 is discharged from the air outlet after passing through the battery pack cavity 2 and the motor 3 under the action of the guide air duct, so as to dissipate heat for the battery pack and the motor 3 at the same time.

[0059] 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 housing, wherein a storage cavity is provided inside the housing; A battery pack cavity is received in the receiving cavity to receive the battery pack; A motor is housed in the storage cavity and is located below the battery pack cavity, and the motor is provided with a fan; Among them, the casing is provided with an air inlet on the top and an air outlet on the bottom. The air outlet is arranged close to the fan. A guide air duct is provided at the air inlet. The guide air duct is used to guide the airflow entering from the air inlet into the storage cavity, and sink along the battery pack cavity into the motor, and be discharged from the air outlet under the action of the fan.

2. The power head according to claim 1, characterized in that: The power head also includes a first air guide plate, one end of which is fixed to the top of the casing, and the other end extends into the storage cavity and is spaced apart from the inner wall of the casing, and the guide air duct is formed between the first air guide plate and the inner wall of the casing.

3. The power head according to claim 2, characterized in that: The first air guide plate includes a first air guide plate partially covering the top of the casing and a second air guide plate extending from the first air guide plate into the storage cavity, the first air guide plate and the second air guide plate are perpendicular to each other, and the guide air duct is formed between the second air guide plate and the inner side wall of the casing.

4. The power head according to claim 3, characterized in that: The first air guide plate is provided with a shielding edge extending toward the outside of the housing, and when the first air guide plate cover is arranged on the top of the housing, the shielding edge covers the air inlet.

5. The power head according to claim 3, characterized in that: The power head further includes a prefabricated plate, which is disposed between the battery pack cavity and the second air guide plate to fixedly connect the battery pack cavity and the second air guide plate.

6. The power head according to claim 5, characterized in that: A ventilation area is provided between the prefabricated panel and the battery pack cavity, and the ventilation area is connected to the guide air duct. When the airflow enters the guide air duct from the air inlet, it flows into the ventilation area along the second air guide plate and then enters the battery pack cavity through the ventilation area.

7. The power head according to claim 1, characterized in that: The battery pack cavity includes a first battery pack cavity and a second battery pack cavity which are arranged in parallel with each other, and a gap is left between the first battery pack cavity and the second battery pack cavity, and airflow sinks into the motor along the gap.

8. The power head according to claim 1, characterized in that: The battery pack cavity is tilted and includes a relatively lower first end and a second end tilted upward from the first end, and the motor is arranged below the second end.

9. The power head according to claim 8, characterized in that: The motor also includes a motor body, the fan is connected to the motor body and is located below the motor body, and the fan is directly opposite to the air outlet, so that the airflow sinking into the motor can be discharged from the air outlet under the action of the fan.

10. The power head according to claim 1, characterized in that: The power head is also provided with a second air guide plate, which is connected between the fan and the air outlet and is used to guide the airflow flowing out of the motor to be discharged through the air outlet.

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