CN113618845A

CN113618845A - Electric planer

Info

Publication number: CN113618845A
Application number: CN202110869475.4A
Authority: CN
Inventors: 龚早京
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-11-09
Anticipated expiration: 2041-07-30
Also published as: CN113618845B

Abstract

The invention relates to an electric planer which comprises a machine shell, wherein the machine shell is provided with an air inlet, a first accommodating cavity for accommodating a motor, a second accommodating cavity for accommodating a circuit board, a fourth accommodating cavity for accommodating a planer tool and a third accommodating cavity for communicating the second accommodating cavity with the fourth accommodating cavity; the base comprises a front movable plate movably arranged at the front bottom of the shell and a rear fixed plate fixed at the rear bottom of the shell, and a planing port for the planing tool to extend out is arranged between the front movable plate and the rear fixed plate; the planer tool is rotatory to be introduced the air current from the air inlet, and the second that flows through holds behind chamber, the third chamber and the fourth chamber of holding is discharged from the plane mouth, forms the cooling duct. The air flow is introduced into the circuit board cooling air channel through the negative pressure generated when the planer tool rotates at a high speed, and the effect of cooling the circuit board is achieved. The air flow is finally discharged from the planing port, and the cooling air duct for motor heat dissipation and the cooling air duct for circuit board heat dissipation are independently arranged, so that negative effects on motor heat dissipation and chip removal effects are avoided.

Description

Electric planer

[ technical field ]

The invention relates to the field of electric tools, in particular to an electric planer.

[ background art ]

The electric planer is a common hand-held electric tool for woodworker, is mainly used for plane planing, chamfering and other operations on various timbers, and is widely applied to processing of house buildings, house decoration, woodworker workshops, furniture industries and other occasions. The electric planer in the prior art mainly utilizes the fan of motor to cool down motor and circuit board simultaneously, because the amount of wind of the fan of motor is invariable, the intake air channel of circuit board region can shunt the intake of some motor regions to lead to the intake of motor region to reduce, influence the cooling effect of motor.

Chinese patent publication No. CN104742197B discloses an electric planer including a case, a motor having a rotating shaft, a power supply part supplying electric power to the motor, a control part, a gang cutter, and a fan. The box has an air inlet and an exhaust and provides an air passage from the air inlet to the exhaust. The fan is provided in the case and configured to generate an air flow within the case and the air flow flows along the air passage in a flow direction. The air passage includes a control cooling passage for cooling the control. The fan is located downstream of the control portion in the flow direction. In the scheme, the air flow for cooling firstly passes through the control part and then flows to the motor, and the heat dissipation effect of the motor is influenced because the air flow is hot air which is firstly dissipated by the control part; and the air flow is finally exhausted from the chip removal port, so that the air output quantity of the fan sent to the chip removal port is reduced, and the chip removal effect of the electric planer is influenced.

Accordingly, there is a need for an improved electric planer that overcomes the deficiencies of the prior art.

[ summary of the invention ]

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide an electric planer with improved heat dissipation.

The technical scheme adopted by the invention for solving the problems in the prior art is as follows: an electric planer comprises a planer tool for planing and cutting a workpiece, a motor for driving the planer tool to rotate and a circuit board for controlling the motor; the method is characterized in that: the electric planer further comprises: the plane cutter comprises a machine shell, a motor and a cutter head, wherein the machine shell is provided with an air inlet, a first accommodating cavity for accommodating the motor, a second accommodating cavity for accommodating the circuit board, a fourth accommodating cavity for accommodating the plane cutter and a third accommodating cavity for communicating the second accommodating cavity with the fourth accommodating cavity; the base supports the shell and comprises a front movable plate movably arranged at the front bottom of the shell and a rear fixed plate fixed at the rear bottom of the shell, and a planing port for the planing tool to extend out is arranged between the front movable plate and the rear fixed plate; the planer tool rotates to introduce airflow from the air inlet, and the airflow flows through the second accommodating cavity, the third accommodating cavity and the fourth accommodating cavity and then is discharged from the planer opening to form a cooling air channel.

The further improvement scheme is as follows: a partition wall is arranged in the shell to enable the first accommodating cavity and the cooling air duct to be mutually isolated.

The further improvement scheme is as follows: the chamber wall that the fourth held the chamber is equipped with the first air inlet that switches on holds the chamber with the third, first air inlet will the chamber wall that the fourth held the chamber divide into chamber wall and lower chamber wall, go up chamber wall and lower chamber wall along the circumference dislocation.

The further improvement scheme is as follows: the wall of the fourth containing cavity is provided with a first air passing opening communicated with the third containing cavity, and the opening direction of the first air passing opening is tangent to the rotating direction of the planing tool.

The further improvement scheme is as follows: the chamber wall that the fourth held the chamber is equipped with the third holds the first wind gap that switches on that the chamber wall, first wind gap of crossing is located the vertical central point in chamber wall.

The further improvement scheme is as follows: and a second air passing opening communicated with the third accommodating cavity is formed in the cavity wall of the fourth accommodating cavity, and the second air passing opening is formed in the transverse edge of the cavity wall.

The further improvement scheme is as follows: the rear fixing plate is formed into a bottom wall of the third accommodating cavity, side plates extending upwards from two sides of the rear fixing plate are formed into side walls of the third accommodating cavity, a third air passing opening is formed in the side walls, and the third air passing opening is communicated with the second air passing opening.

The further improvement scheme is as follows: the fourth containing cavity is a cylindrical cavity, and the rear end face of the front movable plate and the front end face of the rear fixed plate are both arc faces so as to limit partial cavity walls of the fourth containing cavity.

The further improvement scheme is as follows: the machine shell is also provided with a chip discharge channel communicated with the fourth accommodating cavity, and an exhaust channel is communicated between the first accommodating cavity and the chip discharge channel.

The further improvement scheme is as follows: at least two air inlets are formed on the side wall of the casing close to the circuit board.

Compared with the prior art, the invention has the following beneficial effects: set up independent cooling air duct between motor holds chamber and base and holds the chamber with intercommunication circuit board and planer tool, and be used for the radiating cooling air duct of motor and be used for the radiating cooling air duct independent setting of circuit board. The air flow is introduced into the circuit board cooling air channel through the negative pressure generated when the planer tool rotates at a high speed, and the effect of cooling the circuit board is achieved. Meanwhile, the air flow is finally discharged from the planing port, and the heat dissipation and chip removal effects of the motor cannot be reduced. The heat dissipation and chip removal effects of the motor cannot be negatively influenced.

[ description of the drawings ]

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:

FIG. 1 is a schematic view of an electric planer according to the present invention;

FIG. 2 is a schematic cross-sectional view of an electric planer according to a preferred embodiment of the present invention;

FIG. 3 is a schematic structural diagram of the housing of FIG. 2;

FIG. 4 is a schematic cross-sectional view of an electric planer according to another embodiment of the present invention;

FIG. 5 is a schematic structural diagram of the housing of FIG. 4;

FIG. 6 is a schematic bottom view of the housing of FIG. 4;

FIG. 7 is a schematic structural diagram of a chassis according to another embodiment of the present invention;

fig. 8 is a schematic structural diagram of the base of the present invention.

The meaning of the reference symbols in the figures:

100. electric planer 10, casing 101, first chamber that holds

1011. Second air inlet 102, second accommodating cavity 103 and third accommodating cavity

1031. Third air passing port 104, fourth accommodating cavity 1041 and first air passing port

1042. A second air passing opening 105, a first air inlet 106, and a partition wall

11. Base 111, front movable plate 112, rear fixed plate

113. Plane opening 12, motor 13 and circuit board

14. Chip discharge channel 15, depth adjusting mechanism 16 and battery pack

17. Grip handle 171, grip portion 172, and front connecting portion

173. Rear connecting part 18, planer tool

[ detailed description of the invention ]

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 and 2, the electric planer 100 includes a housing 10, a motor 12, a circuit board 13, a battery pack 16 and a planer tool 18. The electric power output by the battery pack 16 drives the motor 12, the circuit board 13 is electrically connected with the motor 12 to control the motor 12 to operate, and the planing tool 18 is driven by the motor 12 to realize planing operation. A small belt pulley is fixed on an output shaft of the motor 12, a large belt pulley is fixed on a central shaft of the planer tool 18, and a belt is connected between the small belt pulley and the large belt pulley. The motor 12 and the planer tool 18 are driven by a belt, the transmission is simple and reasonable, the overload capacity is good, the motor 12 is a brushless motor, the rotating speed is high, the rotating speed of the planer tool can reach 12000 r/min, and the electric planing power can reach 1000W. Of course, a gear transmission may be provided between the motor 12 and the planing tool 18, which will not be described in detail herein.

The electric planer 100 further includes a holding handle 17 disposed at the upper portion of the housing 10, a depth adjusting mechanism 15 disposed at the front portion of the housing 10, and a base 11 disposed at the bottom of the housing 10 for supporting the housing 10. The grip 17 extends in the front-rear direction above the housing 10 and includes a grip portion 171, a front connecting portion 172, and a rear connecting portion 173. The grip 171 is cylindrical to facilitate gripping by an operator. A start switch is provided below the grip portion 171, and when an operator presses the start switch, power is supplied from the battery pack 16 to the motor 12. The front connection part 172 extends downward from the front of the grip part 171, so that the front of the grip part 171 and the front upper part of the housing 10 are connected to each other by the front connection part 172. The rear connection part 173 extends from the rear of the grip part 171, so that the rear of the grip part 171 and the upper portion of the housing 10 are connected to each other through the rear connection part 173. The battery pack 16 is detachably mounted to the rear of the rear connection part 173, and the battery pack 16 includes a plurality of lithium batteries therein.

Referring to fig. 2, the base 11 includes a front movable plate 111 movably disposed at the front bottom of the casing 10 and a rear fixed plate 112 fixed at the rear bottom of the casing 10, and a planing port 113 for extending the planing tool 18 is disposed between the front movable plate 111 and the rear fixed plate 112. The turning of the knob provided on the depth adjusting mechanism 15 can adjust the front movable plate 111 to move up and down relative to the planer tool 18, so as to adjust the planing depth of the electric planer 100. Planer tool 18 includes the arbor body and installs a plurality of cutting edges on the arbor body, and a plurality of cutting edges set up in the outer wall of arbor body along the axle center circumference rule of arbor body. When the wood cutting machine works, the cutter shaft body rotates to drive the cutting edge to cut wood, and the cut chips or veneers are thrown out to the chip discharge channel 14 and then discharged to the outside of the machine shell 10 through the chip discharge channel 14. When the electric planer 100 is used for planing, a user presses the electric planer 100 against the surface to be machined of the workpiece, so that the base 11 is in contact with the surface to be machined; and (3) opening a starting switch on the holding handle 17, moving the electric planer 100 by an operator to slide back and forth along the processing surface, planing and cutting the workpiece by tightly attaching the bottom plate 11 to the workpiece when the electric planer moves forwards, and lifting the electric planer 100 to return to a planing and cutting point when the electric planer moves backwards, so that the workpiece can be planed and cut.

The defect of insufficient heat dissipation efficiency caused by the fact that the motor and the circuit board share the cooling air channel in the prior art is overcome. Referring to fig. 2 and 3, in the preferred embodiment, at least two first air inlets 105 communicating with the outside are disposed on the housing 10 corresponding to both lateral sides of the circuit board 13, and the external air introduced into the housing 10 through the first air inlets 105 first contacts the circuit board 13, that is, the external air having the lowest temperature is used to cool the circuit board 13, thereby effectively cooling the circuit board 13. The interior of the housing 10 defines a first receiving chamber 101 for receiving the motor 12, a second receiving chamber 102 for receiving the circuit board 13, a fourth receiving chamber 104 for receiving the planer tool 18, and a third receiving chamber 103 defined between the first receiving chamber 101 and the rear fixing plate 112. The second accommodating cavity 102, the third accommodating cavity 103 and the fourth accommodating cavity 104 form a cooling air duct for independent heat dissipation of the circuit board 13. Referring to fig. 2, the flow direction of the heat dissipation of the circuit board 13 in the preferred embodiment is as follows: through the negative pressure of the peripheral air generated by the planing tool 18 rotating at a high speed, under the action of the negative pressure of the air, the external air is introduced from the first air inlet 105, flows through the second accommodating cavity 102, the third accommodating cavity 103 and the fourth accommodating cavity 104, and is then discharged from the planing port 113, so that the circulating ventilation of the cooling air is formed, and the flowing cooling air continuously acts on the circuit board 13 in the second accommodating cavity 102, so that the cooling effect on the circuit board 13 in operation is achieved.

As shown in fig. 2 and fig. 3, the fourth accommodating cavity 104 is located between the front movable plate 111 and the rear fixed plate 112, and is a cylindrical cavity, and the rear end surface of the front movable plate 111 and the front end surface of the rear fixed plate 112 are both arc surfaces to define a partial cavity wall of the fourth accommodating cavity 104. The planer tool 18 is rotatably and transversely supported in the fourth accommodating cavity 104, and a first air passing opening 1041 communicated with the third accommodating cavity 103 is formed in the wall of the fourth accommodating cavity 104, so that cooling air can flow from the third accommodating cavity 103 to the fourth accommodating cavity 104 through the first air passing opening 1041. The first air passing opening 1041 is arranged at a longitudinally central position of the cavity wall, and divides the cavity wall of the fourth accommodating cavity 104 into an upper cavity wall and a lower cavity wall. When the electric planer is in operation, the chippings or veneers after being planed can be thrown out to the chippings discharge channel 14 arranged above the fourth accommodating cavity 104, and in order to prevent the chippings brought out by the rotating planer tool 18 from blocking the first air passing opening 1041, in the preferred embodiment, the upper cavity wall and the lower cavity wall are arranged to be circumferentially staggered. Since the planer tool 18 rotates clockwise, in this embodiment, the lower cavity wall is preferably offset from the upper cavity wall by 1-2mm toward the rear of the housing 10.

Meanwhile, in order to increase the flow rate of air flowing through the cooling air duct in unit time, the opening direction of the first air passing hole 1041 is tangential to the rotation direction of the planing tool 18, so that the wind resistance can be effectively reduced, unnecessary energy loss can be reduced, and the energy utilization rate can be further increased.

Referring to fig. 4, 5 and 6, as an implementation manner, when the planer tool 18 rotates at a high speed, the air negative pressure generated at two axial sides of the planer tool is greater than the air negative pressure generated at the middle axial side of the planer tool, so in this embodiment, the cavity wall of the fourth accommodating cavity 104 is provided with a second air passing opening 1042 communicated with the third accommodating cavity 103, and the second air passing opening 1042 is located at a lateral edge position of the cavity wall. The second air passing holes 1042 may be only disposed on one lateral side of the cavity wall, or may be disposed on both lateral sides of the cavity wall. Meanwhile, the rear fixing plate 112 forms a bottom wall of the third accommodating chamber 103, side plates extending from two sides of the rear fixing plate 112 or side plates extending downward from two sides of a top wall of the third accommodating chamber 103 form a side wall of the third accommodating chamber 103, a third air passing opening 1031 is formed in the side wall, and the third air passing opening 1031 is communicated with the second air passing opening 1042. Referring to fig. 4, cooling air flows from the third receiving chamber 103 to the fourth receiving chamber 104 through the second and third air passing ports 1042 and 31.

Referring to fig. 7 and 8, as another possible implementation manner, in the present application, only the first air passing opening 1042 may be provided, or a combination of the second air passing opening 1042 and the third air passing opening 1031 may be provided, or all three air passing openings may be provided, which is set according to actual needs as long as the air volume of the cooling air duct can be ensured.

According to the inventive concept of the present invention, a partition wall is provided in the housing 10 to separate the first receiving chamber 101 and the cooling air duct from each other, so that the cooling air duct for heat dissipation of the motor 12 and the cooling air duct for the circuit board 13 are provided independently, and the cooling air flow flowing through the circuit board 13 does not adversely affect the heat dissipation of the motor 12 and the chip removal effect of the electric planer 100. Specifically, a first receiving cavity 101 for receiving the motor 12 is defined in the middle of the housing 10, and a plurality of second air inlets 1011 are disposed on the side wall of the first receiving cavity 101 and opposite to the motor 12. An exhaust channel is communicated between the first accommodating cavity 101 and the chip discharge channel 14, one end of the exhaust channel is connected with an air outlet of the first accommodating cavity 101, the other end of the exhaust channel is connected to the chip discharge channel 14, and air flow which flows through the first accommodating cavity 101 and is used for cooling the motor 12 is introduced into the chip discharge channel 14 to be used for discharging chips. The air flow direction for heat dissipation of the motor 12 in the preferred embodiment is as follows: under the action of the fan of the motor 12, the external air is introduced from the second air inlet 1011, flows through the first receiving chamber 101 and the air exhaust channel, and is exhausted from the chip exhaust channel 14 to the outside of the housing 10.

In the invention, an independent cooling air duct is arranged between the first accommodating cavity 101 for accommodating the motor 12 and the base 11 to communicate the second accommodating cavity 102 for accommodating the circuit board 13 and the fourth accommodating cavity 104 for accommodating the planer tool 18, and the cooling air duct for dissipating heat of the motor 12 and the cooling air duct for dissipating heat of the circuit board 13 are arranged independently. The negative pressure generated when the planer tool 18 rotates at a high speed introduces air flow into the cooling air duct of the circuit board 13, thereby achieving the effect of cooling the circuit board 13. At the same time, the air flow is finally discharged from the planer hole 113, and the heat dissipation and chip removal effects of the motor 12 are not reduced. The heat dissipation and chip removal effects of the motor cannot be negatively influenced.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric planer comprises a planer tool for planing and cutting a workpiece, a motor for driving the planer tool to rotate and a circuit board for controlling the motor; the method is characterized in that: the electric planer further comprises:

the plane cutter comprises a machine shell, a motor and a cutter head, wherein the machine shell is provided with an air inlet, a first accommodating cavity for accommodating the motor, a second accommodating cavity for accommodating the circuit board, a fourth accommodating cavity for accommodating the plane cutter and a third accommodating cavity for communicating the second accommodating cavity with the fourth accommodating cavity;

the base supports the shell and comprises a front movable plate movably arranged at the front bottom of the shell and a rear fixed plate fixed at the rear bottom of the shell, and a planing port for the planing tool to extend out is arranged between the front movable plate and the rear fixed plate;

the planer tool rotates to introduce airflow from the air inlet, and the airflow flows through the second accommodating cavity, the third accommodating cavity and the fourth accommodating cavity and then is discharged from the planer opening to form a cooling air channel.

2. The electric planer of claim 1, wherein: a partition wall is arranged in the shell to enable the first accommodating cavity and the cooling air duct to be mutually isolated.

3. The electric planer of claim 1, wherein: the chamber wall that the fourth held the chamber is equipped with the first air inlet that switches on holds the chamber with the third, first air inlet will the chamber wall that the fourth held the chamber divide into chamber wall and lower chamber wall, go up chamber wall and lower chamber wall along the circumference dislocation.

4. The electric planer of claim 1, wherein: the wall of the fourth containing cavity is provided with a first air passing opening communicated with the third containing cavity, and the opening direction of the first air passing opening is tangent to the rotating direction of the planing tool.

5. The electric planer of claim 1, wherein: the chamber wall that the fourth held the chamber is equipped with the third holds the first wind gap that switches on that the chamber wall, first wind gap of crossing is located the vertical central point in chamber wall.

6. The electric planer of claim 1 or 5, wherein: and a second air passing opening communicated with the third accommodating cavity is formed in the cavity wall of the fourth accommodating cavity, and the second air passing opening is formed in the transverse edge of the cavity wall.

7. The electric planer of claim 6, wherein: the rear fixing plate is formed into a bottom wall of the third accommodating cavity, side plates extending upwards from two sides of the rear fixing plate are formed into side walls of the third accommodating cavity, a third air passing opening is formed in the side walls, and the third air passing opening is communicated with the second air passing opening.

8. The electric planer of claim 1, wherein: the fourth containing cavity is a cylindrical cavity, and the rear end face of the front movable plate and the front end face of the rear fixed plate are both arc faces so as to limit partial cavity walls of the fourth containing cavity.

9. The electric planer of claim 1, wherein: the machine shell is also provided with a chip discharge channel communicated with the fourth accommodating cavity, and an exhaust channel is communicated between the first accommodating cavity and the chip discharge channel.

10. The electric planer of claim 1, wherein: at least two air inlets are formed on the side wall of the casing close to the circuit board.