Motor fixing device on electric tool

Abstract

The utility model provides a motor fixing device on an electric tool. The motor fixing device aims at solving the problem that in the prior art, a tool adopting a brushless motor is not reasonable in structural design, and consequently assembling is troublesome. A motor fixing device on an electric tool comprises a shell and a motor, a motor mounting cavity is formed in the front side in the shell, and the motor is arranged in the motor mounting cavity; a front baffle and a rear baffle are arranged on the front side and the rear side of the motor mounting cavity correspondingly, and through holes are formed in the front baffle and the rear baffle correspondingly. The shell is formed by splicing a first splicing shell and a second splicing shell, a first groove is formed in the first splicing shell, a second groove is formed in the second splicing shell, and after the first splicing shell and the second splicing shell are spliced and fixed, the first groove and the second groove form the motor mounting cavity. According to the utility model, the brushless motor and the battery assembly can be assembled on the shell more conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor fixing devices, and in particular relates to a motor fixing device on an electric tool. Background Art

[0002] In the prior art, some electric tools, such as electric grinders, usually use brushless motors as power sources. The brushless motor consists of a motor body and a driver, and is a typical mechatronics product. Since the brushless motor operates in an automatic control mode, it does not require an additional starting winding on the rotor like a synchronous motor that starts under heavy load under variable frequency speed regulation, nor does it produce oscillation and loss of step when the load suddenly changes. The brushless motor has the advantages of low noise, smooth operation and long life. In the prior art, the housing of the electric grinder using a brushless motor adopts an integrally molded straight-cylinder design, with the brushless motor and the battery pack located at both ends respectively, and the motor and the battery are connected by wires. This structure requires the battery and the motor to be installed into the housing from the ends of the housing during assembly, and the assembly and fixing process is relatively troublesome, so further improvement is needed. Utility Model Content

[0003] The utility model provides a motor fixing device for an electric tool, aiming to solve the problem in the prior art that the tool structure design using a brushless motor is unreasonable, resulting in troublesome assembly.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A motor fixing device on an electric tool comprises a shell and a motor, wherein a motor installation cavity is provided on the front side of the shell, and the motor is arranged in the motor installation cavity; a front baffle and a rear baffle are respectively provided on the front and rear sides of the motor installation cavity, and through holes are provided on the front baffle and the rear baffle; the shell is formed by splicing a first splicing shell and a second splicing shell, wherein a first groove is provided in the first splicing shell, and a second groove is provided in the second splicing shell, and when the first splicing shell and the second splicing shell are spliced ​​and fixed, the first groove and the second groove form the motor installation cavity.

[0006] A further solution: the front baffle is located at the front end of the shell, and is formed by splicing an upper half of the front baffle located on the first splicing shell and a lower half of the front baffle located on the second splicing shell.

[0007] Based on the above technical solution: by arranging the front baffle to be spliced ​​by the upper half and the lower half, it is easy to manufacture and process, and more convenient to assemble.

[0008] A further solution: a front cover is provided on the front side of the shell, and the output shaft of the motor is arranged through the front baffle and the front cover.

[0009] A further solution is as follows: a plurality of card blocks are arranged around the front cover, and a plurality of card slots are arranged around the front end of the shell, each of the card slots includes a card connection portion and a card entrance, and when the card block enters the card slot through the card entrance, the card block can be engaged with the card connection portion by rotating the front cover counterclockwise.

[0010] Based on the above technical solution: the front cover not only fixes the first spliced ​​shell and the second spliced ​​shell together, but also facilitates the output shaft of the brushless motor to pass through the shell; the front cover adopts a slot and a block and is rotated to fit into the slot, which is convenient for assembly and disassembly.

[0011] A further solution: the rear baffle is located in the middle of the shell, and the rear baffle is formed by splicing the upper half of the rear baffle located on the first splicing shell and the lower half of the rear baffle located on the second splicing shell, and a connecting part is provided at the rear end of the motor, and the connecting part is stuck in the through hole of the rear baffle.

[0012] Based on the above technical solution: by arranging the rear baffle to be spliced ​​by the upper half and the lower half, it is easy to manufacture and process, and more convenient to assemble.

[0013] A further solution: the first spliced ​​shell and the second spliced ​​shell are fastened by screws after being spliced ​​together.

[0014] Based on the above technical solution: after the first spliced ​​shell and the second spliced ​​shell are spliced ​​together, they are fixed together by screws, which is more convenient during assembly and disassembly.

[0015] A further solution: a plurality of first connecting columns are provided on the first splicing shell, and a plurality of second connecting columns are provided on the second splicing shell. When the first splicing shell and the second splicing shell are spliced, each of the first connecting columns is inserted into the corresponding second connecting column, and the screws are screwed into the second connecting columns and the corresponding first connecting columns in turn.

[0016] Based on the above technical solution: the first connecting column is inserted into the corresponding second connecting column, which plays a role of preliminary auxiliary positioning during assembly and facilitates the assembly of screws.

[0017] A further solution: A motor fixing device on an electric tool also includes a battery, and a battery installation cavity is provided on the rear side of the shell, and the battery is arranged in the battery installation cavity.

[0018] Based on the above technical solution: the brushless motor and the battery are respectively assembled on the front and rear sides of the shell, and the shell is assembled by a first splicing shell and a second splicing shell, so as to facilitate the assembly of the brushless motor and the battery on the shell.

[0019] A further solution: the shell is provided with a heat dissipation hole connected to the motor installation cavity.

[0020] The beneficial effects of the utility model are:

[0021] The utility model sets a motor installation cavity on the front side of the housing for installing a brushless motor, the through hole of the front baffle is used for the output shaft of the motor to pass through, and the through hole of the rear baffle facilitates the brushless motor and the battery on the rear side of the housing to be connected through a wire. The utility model sets the housing to be spliced ​​by a first splicing shell and a second splicing shell, so that it is more convenient to assemble the brushless motor and the battery assembly to the housing. The brushless motor and the battery assembly can be placed in the groove of one of the splicing shells first, and then the other half of the splicing shell is assembled, and the connection of the brushless motor and the battery assembly is also convenient during assembly. The structure can be applied to products such as electric grinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The utility model is a schematic diagram of the cross-sectional structure of a motor fixing device on an electric tool.

[0024] Figure 2 The utility model is a schematic diagram of the exploded structure of a motor fixing device on an electric tool.

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the card block and the card slot.

[0026] Figure 4 It is a schematic diagram of the exploded structure of the front cover and the shell.

[0027] Description of the numbers in the figure:

[0028] 1-shell; 11-first splicing shell; 111-first connecting column; 12-second splicing shell; 121-second connecting column; 13-front baffle; 14-rear baffle; 15-card slot; 151-card entrance; 2-front cover; 21-card block; 3-motor; 4-battery; 5-motor installation cavity; 6-battery installation cavity; 7-rear cover. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.

[0030] like Figures 1 to 4 As shown, this embodiment provides a motor fixing device on an electric tool, including a housing 1 and a motor 3, wherein a motor installation cavity 5 is provided on the front side of the housing 1, and the motor 3 is arranged in the motor installation cavity 5; a front baffle 13 and a rear baffle 14 are provided on the front and rear sides of the motor installation cavity 5, respectively, and through holes are provided on the front baffle 13 and the rear baffle 14; the housing 1 is formed by splicing a first splicing shell 11 and a second splicing shell 12, wherein a first groove is provided in the first splicing shell 11, and a second groove is provided in the second splicing shell 12, and when the first splicing shell 11 and the second splicing shell 12 are spliced ​​and fixed, the first groove and the second groove form the motor installation cavity 5, and after the housing 1 and the brushless motor 3 are assembled together, they are located between the front baffle 13, the rear baffle 14, the first groove and the second groove. The electric tool can be a product such as an electric grinder, and the motor is preferably a brushless motor.

[0031] In this embodiment, a battery 4 is further provided in the housing 1. Specifically, a battery installation cavity 6 is provided at the rear side of the housing 1, and the battery 4 is arranged in the battery installation cavity 6. The battery installation cavity 6 is connected to the motor installation cavity 5 through a through hole of the rear baffle 14, and the through hole facilitates the connection wires of the brushless motor 3 and the battery 4 to pass through.

[0032] During assembly, the battery 4 and the brushless motor 3 can be connected by wires first, and then placed on the first splicing shell 11 or the second splicing shell 12, and then the other half of the splicing shell can be assembled and spliced, which is very convenient. After the first splicing shell 11 and the second splicing shell 12 are spliced, they can be further fastened by screws.

[0033] In this embodiment, the front baffle 13 is located at the front end of the shell 1, and is formed by splicing the upper half of the front baffle 13 located on the first splicing shell 11 and the lower half of the front baffle 13 located on the second splicing shell 12. After the first splicing shell 11 and the second splicing shell 12 are spliced ​​into the shell 1, the upper half and the lower half are spliced ​​into the front baffle 13.

[0034] In this embodiment, the rear baffle 14 is located in the middle of the shell 1, and the rear baffle 14 separates the battery installation cavity 6 and the motor installation cavity 5, and the rear baffle 14 is spliced ​​by the upper half of the rear baffle 14 located on the first splicing shell 11 and the lower half of the rear baffle 14 located on the second splicing shell 12. A connecting portion is provided at the rear end of the motor 3, and the connecting portion is stuck in the through hole of the rear baffle 14, and the connecting portion is connected to the battery 4 through a wire.

[0035] In this embodiment, Figure 3 and Figure 4 As shown, in order to further make the assembled shell 1 more beautiful, a front cover 2 is provided at the front side of the shell 1, and the output shaft of the motor 3 is arranged through the front baffle 13 and the front cover 2. The specific connection structure between the front cover 2 and the shell 1 can be set as follows: a plurality of clamping blocks 21 are arranged around the front cover 2, and a plurality of clamping slots 15 are arranged around the front end of the shell 1, each of the clamping slots 15 includes a clamping portion and a clamping inlet 151, and when the clamping block 21 enters the clamping slot 15 through the clamping inlet 151, the clamping block 21 can be clamped with the clamping portion by rotating the front cover 2 counterclockwise, that is, when installing the front cover 2, firstly, the first assembled shell 11 and the second assembled shell 12 are assembled together, and then the clamping block 21 of the front cover 2 is aligned with the clamping inlet 151 of the clamping slot 15 on the shell 1, and then the front cover 2 is rotated counterclockwise to clamp the clamping block 21 of the front cover 2 into the clamping slot 15, and when the front cover 2 is removed, the front cover 2 is rotated clockwise. After the front cover 2 is screwed into the front side of the housing 1, it also plays a role in preliminarily fixing the first splicing shell 11 and the second splicing shell 12 together. The rear side of the housing 1 is provided with a rear cover 7, on which a switch and a charging interface can be provided.

[0036] In this embodiment, Figure 2 As shown, as a structure that facilitates the fastening of the first splicing shell 11 and the second splicing shell 12 by screws, the first splicing shell 11 is provided with a plurality of first connecting columns 111, and the second splicing shell 12 is provided with a plurality of second connecting columns 121. When the first splicing shell 11 and the second splicing shell 12 are spliced, each of the first connecting columns 111 is inserted into the corresponding second connecting column 121, and the screws are screwed into the second connecting column 121 and the corresponding first connecting column 111 in sequence. The number of the first connecting columns 111 and the second connecting columns 121 is preferably four, wherein two first connecting columns 111 are located on opposite sides of the middle of the shell 1, and the other two first connecting columns 111 are located on opposite sides of the rear of the shell 1. During assembly, when the first splicing shell 11 and the second splicing shell 12 are spliced, the first connecting column 111 is inserted into the corresponding second connecting column 121, which plays a role of preliminary auxiliary positioning during assembly so that the first splicing shell 11 and the second splicing shell 12 are initially fixed together, thereby facilitating further installation of screws.

[0037] In order to facilitate heat dissipation, in this embodiment, a heat dissipation hole connected to the motor installation cavity 5 is provided on the housing 1. Specifically, the heat dissipation hole can be provided on the front side of the housing 1 or on the front part of the housing 1.

[0038] Working principle description:

[0039] When assembling this embodiment, the brushless motor 3 and battery 4 components can be first connected by wires, and then placed in the groove of one of the splicing shells, and then the other half of the splicing shell is spliced ​​on, and then fastened with screws.

[0040] The present utility model is not limited to the above optional implementation modes. Under the premise of not conflicting with each other, the various schemes can be combined arbitrarily. Anyone can derive other forms of products under the inspiration of the present utility model. However, no matter what changes are made in their shapes or structures, all technical schemes that fall within the scope defined by the claims of the present utility model fall within the protection scope of the present utility model.

Claims

1. A motor fixing device for an electric tool, characterized in that: It includes a shell and a motor, the front side of the shell is provided with a motor installation cavity, and the motor is arranged in the motor installation cavity; the front and rear sides of the motor installation cavity are respectively provided with a front baffle and a rear baffle, and the front baffle and the rear baffle are both provided with through holes; the shell is formed by splicing a first splicing shell and a second splicing shell, the first splicing shell is provided with a first groove, and the second splicing shell is provided with a second groove, when the first splicing shell and the second splicing shell are spliced ​​and fixed, the first groove and the second groove form the motor installation cavity.

2. A motor fixing device for an electric tool according to claim 1, characterized in that: The front baffle is located at the front end of the shell, and is formed by splicing an upper half of the front baffle located on the first splicing shell and a lower half of the front baffle located on the second splicing shell.

3. A motor fixing device for an electric tool according to claim 1 or 2, characterized in that: A front cover is provided on the front side of the shell, and the output shaft of the motor is arranged through the front baffle and the front cover.

4. The motor fixing device for an electric tool according to claim 3, characterized in that: A plurality of card blocks are arranged around the front cover, and a plurality of card slots are arranged around the front end of the shell. Each of the card slots includes a card connection portion and a card entry. When the card block enters the card slot through the card entry, the card block can be connected to the card connection portion by rotating the front cover counterclockwise.

5. The motor fixing device for an electric tool according to claim 1, characterized in that: The rear baffle is located in the middle of the shell, and is formed by splicing the upper half of the rear baffle located on the first splicing shell and the lower half of the rear baffle located on the second splicing shell. A connecting portion is provided at the rear end of the motor, and the connecting portion is stuck in the through hole of the rear baffle.

6. The motor fixing device for an electric tool according to claim 1, characterized in that: The first splicing shell and the second splicing shell are fastened by screws after being spliced.

7. A motor fixing device for an electric tool according to claim 6, characterized in that: The first splicing shell is provided with a plurality of first connecting columns, and the second splicing shell is provided with a plurality of second connecting columns. When the first splicing shell and the second splicing shell are spliced, each of the first connecting columns is inserted into the corresponding second connecting column, and the screws are screwed into the second connecting column and the corresponding first connecting column in sequence.

8. The motor fixing device for an electric tool according to claim 1, characterized in that: It also includes a battery. A battery installation cavity is provided on the rear side of the shell, and the battery is arranged in the battery installation cavity.

9. The motor fixing device for an electric tool according to claim 1, characterized in that: The shell is provided with a heat dissipation hole connected to the motor installation cavity.

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