CN113523980A - Grinding machine - Google Patents

Abstract

The invention relates to the technical field of electric tools and discloses a grinding machine. The grinding machine comprises a machine shell, an air guide cover, an elastic supporting piece and a grinding plate. A driver is disposed within the housing and has an output shaft extending out of the housing along a first axis. The wind guide cover is sleeved outside the output shaft and is detachably connected with the casing, and a mounting hole extending in parallel along the first axis is formed in the wind guide cover. The first end of the elastic supporting piece is kept in the space between the machine shell and the air guide cover, and the second end of the elastic supporting piece extends out of the mounting hole. The polishing plate is arranged on the output shaft. According to the sander provided by the invention, the elastic supporting piece is installed and fixed through the matching of the machine shell and the air guide cover, so that the firmness of the installation of the elastic supporting piece can be ensured, the elastic supporting piece is prevented from falling off, the service life of the elastic supporting piece is prolonged, the structure of the machine shell can be simplified, an additional fixing plate is not required to be additionally arranged, the assembly efficiency of the sander is favorably improved, and the size of the whole sander is reduced.

Description

Grinding machine

Technical Field

The invention relates to the technical field of electric tools, in particular to a grinding machine.

Background

Grinders typically utilize a drive to move a grinding plate for the grinding operation. In order to ensure the stability of the operation of the sanding plate, a support structure is usually required to support the sanding plate. In order to mount the supporting structure, in the existing sander, a special accommodating structure is usually arranged on the machine shell, and the supporting structure is mounted in the accommodating structure, however, the mounting method not only increases the complexity of the machine shell structure, but also the supporting structure is not firmly mounted, and the supporting structure is easy to fall off the accommodating structure during sanding; in order to fix the supporting structure firmly, a fixing plate is introduced into part of the grinding machine, and the supporting structure is fixed by the fixing plate, however, the installation method also complicates the structure of the machine shell, and the number of parts is too large, which reduces the assembly efficiency of the grinding machine.

Therefore, a new grinding machine and a grinding machine installation method are needed to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a grinding machine which can ensure the installation firmness of an elastic supporting piece, prevent the elastic supporting piece from falling off, simplify the structure of a machine shell, avoid an additional fixed plate and reduce the size of the whole machine.

In order to achieve the purpose, the invention adopts the following technical scheme:

a sander, comprising:

a housing having a drive disposed therein, the drive having an output shaft extending out of the housing along a first axis;

the wind guide cover is sleeved outside the output shaft and is detachably connected with the shell, and a mounting hole extending in parallel along the first axis is formed in the wind guide cover;

a first end of the elastic supporting piece is kept in a space between the machine shell and the air guide cover, and a second end of the elastic supporting piece extends out of the mounting hole;

and the grinding plate is arranged on the output shaft.

As a preferable mode of the sander, the casing includes an air guiding chamber, the air guiding chamber is located at the bottom of the casing, and the air guiding cover is located in the air guiding chamber and connected to the casing.

As a preferable scheme of the grinding machine, the air guide chamber includes a partition plate and a through hole provided in the partition plate, and the through hole allows the output shaft to pass through the partition plate.

Preferably, the grinding machine further includes a fastening member for attaching the wind scooper to the partition plate.

As a preferable scheme of the grinding machine, the casing includes a dust exhaust pipe for discharging dust, the air guiding cover further includes a dust outlet disposed in the air guiding chamber, and the dust outlet is communicated with the dust exhaust pipe.

In a preferred embodiment of the sander, the first end of the elastic support is provided with a flange, the mounting hole is a stepped hole, and a bottom surface of the flange abuts against a stepped surface of the stepped hole.

As a preferable mode of the sander, the mounting hole extends along a second axis to penetrate through the wind scooper, and the first end of the elastic support is provided with a flange, and a projection of the flange along the direction of the second axis at least partially exceeds a projection of the mounting hole along the second axis.

As a preferable scheme of the polishing machine, the polishing plate comprises a first polishing plate, a connecting hole is formed in the first polishing plate, and the second end of the elastic support member is inserted into the connecting hole.

As a preferable aspect of the sander, the first sanding plate is a rectangular sanding plate or a triangular sanding plate.

As a preferable scheme of the polishing machine, the polishing plate comprises a second polishing plate, the second polishing plate is a circular polishing plate, and an output shaft of the driver drives the second polishing plate to rotate;

the polisher further comprises a damping ring, the damping ring is arranged on the air guide cover and sleeved outside the output shaft, and the damping ring is in contact with the top surface of the second polishing plate.

The invention has the beneficial effects that:

according to the sander provided by the invention, the elastic supporting piece is installed and fixed through the matching of the machine shell and the air guide cover, so that the firmness of the installation of the elastic supporting piece can be ensured, the elastic supporting piece is prevented from falling off, the service life of the elastic supporting piece is prolonged, the structure of the machine shell can be simplified, an additional fixing plate is not required to be additionally arranged, the assembly efficiency of the sander is improved, and the size of the whole sander is reduced; meanwhile, the elastic supporting piece can play a role in elastically supporting the polishing plate, so that the polishing plate can move relative to the air guide cover to perform polishing operation, and meanwhile, the polishing plate can be prevented from vibrating up and down; in addition, the wind scooper can optimize the heat dissipation performance and the dust collecting effect of the grinding machine, and the service life of the grinding machine is prolonged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic structural view of a sander according to an embodiment of the present invention when a triangular sanding plate is installed;

FIG. 2 is an exploded view of a sander provided by an embodiment of the present invention at a first angle when a triangular sanding plate is installed;

FIG. 3 is an exploded view of a sander according to an embodiment of the present invention at a second angle when a triangular sanding plate is installed;

FIG. 4 is a partial exploded view of a sander provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a rectangular sanding plate provided in accordance with an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a second sanding plate according to an embodiment of the present invention.

In the figure:

1-a machine shell; 11-a wind guide chamber; 111-a separator; 12-a connecting column;

2-wind scooper; 21-mounting holes; 22-fastening holes; 23-a dust outlet;

3-a resilient support; 31-a flange;

4-a first sanding plate; 40-connecting holes; 41-rectangular sanding plate; 42-triangular sanding plate;

5-a second sanding plate;

6-damping ring.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. 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 the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only or to distinguish between different structures or components and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable 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.

As shown in fig. 1 to 4, the present embodiment provides a sander that can be used for sanding a workpiece or a wall surface or the like. Specifically, the sander comprises a housing 1, a wind scooper 2, an elastic support 3 and a sanding plate. Wherein a drive is arranged in the housing 1, the drive having an output shaft extending out of the housing 1 along a first axis. The wind scooper 2 is sleeved outside the output shaft and detachably connected with the casing 1, and a mounting hole 21 extending in parallel along the first axis is formed in the wind scooper 2. A first end of the elastic support 3 is held in the space between the cabinet 1 and the wind scooper 2, and a second end of the elastic support 3 protrudes through the mounting hole 21. The polishing plate is arranged on the output shaft.

According to the sander provided by the embodiment, the elastic supporting piece 3 is installed and fixed through the matching of the machine shell 1 and the air guide cover 2, so that the installation firmness of the elastic supporting piece 3 can be ensured, the elastic supporting piece 3 is prevented from falling off, the service life of the elastic supporting piece 3 is prolonged, the structure of the machine shell 1 can be simplified, an additional fixing plate is not required to be additionally arranged, the assembly efficiency of the sander is improved, and the size of the whole sander is reduced; meanwhile, the elastic supporting piece 3 can play a role in elastically supporting the polishing plate, so that the polishing plate can move relative to the air guide cover 2 to perform polishing operation, and meanwhile, the polishing plate can be prevented from vibrating up and down; in addition, the wind scooper 2 can optimize the heat dissipation performance and the dust collection effect of the grinding machine, and the service life of the grinding machine is prolonged.

Preferably, the number of the elastic supports 3 is plural. The cooperation of the plurality of elastic supporting members 3 is advantageous for improving the working stability of the sanding plate. Specifically, in the present embodiment, the number of the elastic supports 3 is four.

Alternatively, the elastic support 3 is made of a rubber material. Of course, in other embodiments, other elastic materials may be used for the elastic support 3.

Preferably, as shown in fig. 2, the casing 1 includes an air guiding chamber 11, the air guiding chamber 11 is located at the bottom of the casing 1, and the air guiding cover 2 is located in the air guiding chamber 11 and connected to the casing 1. The air guide chamber 11 is arranged at the bottom of the casing 1, so that the air guide cover 2 can be prevented from extending into the casing 1 too deeply, and the air guide cover 2 and the casing 1 can be assembled conveniently.

As shown in fig. 2, the air guiding chamber 11 includes a partition 111 and a through hole provided on the partition 111 for the output shaft to pass through the partition 111. The partition 111 may limit the elastic supporting member 3, so as to prevent the elastic supporting member 3 from moving upward, and ensure that the elastic supporting member 3 is reliably fixed in the mounting hole 21. In addition, the partition 111 may also serve to block dust, preventing the dust from entering into the chamber at the upper portion of the cabinet 1.

Further, the grinding machine according to the present embodiment further includes a fastening member for mounting the wind scooper 2 to the partition 111. The fastener not only can guarantee the fixed reliability of wind scooper 2, can also realize the demountable installation of wind scooper 2.

Optionally, a connecting column 12 is arranged on the partition 111, a fastening hole 22 is arranged on the wind scooper 2, and one end of a fastening member can penetrate through the fastening hole 22 and extend into the connecting column 12 and is connected with the connecting column 12, so that the wind scooper 2 is fixedly connected with the casing 1. Optionally, the number of the connecting columns 12 and the fastening holes 22 is multiple, and the connecting columns and the fastening holes are arranged in a one-to-one correspondence manner, that is, the wind scooper 2 is fixedly connected to the casing 1 through multiple fastening members. Further, the plurality of fastening holes 22 are arranged at intervals along the circumferential direction of the wind scooper 2. Specifically, in the present embodiment, the number of fasteners is four. Alternatively, the fasteners are screws and the attachment posts 12 are screw posts. Optionally, the screw has a diameter of 2.9 mm.

Preferably, as shown in fig. 4, the casing 1 includes a dust exhaust pipe for discharging dust, the wind scooper 2 further includes a dust outlet 23 disposed in the wind guiding chamber 11, and the dust outlet 23 is communicated with the dust exhaust pipe. The dust outlet 23 is matched with the dust exhaust pipe, so that the dust in the air guide chamber 11 can be exhausted.

Alternatively, as shown in fig. 4, the first end of the elastic support 3 is provided with a flange 31, the mounting hole 21 is a stepped hole, and the bottom surface of the flange 31 abuts against the stepped surface of the stepped hole. Through the cooperation of flange 31 and the step hole, elastic support member 3 can be prevented from being separated downwards from mounting hole 21, thereby being beneficial to ensuring the stability of the cooperation of elastic support member 3 and wind scooper 2 and improving the reliability of fixing elastic support member 3.

Optionally, the mounting hole 21 extends along the second axis to penetrate through the wind scooper 2, the first end of the elastic support 3 is provided with a flange 31, and a projection of the flange 31 along the second axis direction at least partially exceeds a projection of the mounting hole 21 along the second axis, so as to ensure the reliability of the fixation of the elastic support 3.

Optionally, the cross-section of the elastic support 3 is kidney-shaped. By adopting the waist-shaped elastic support piece 3, the elastic support piece 3 can be prevented from rotating in the mounting hole 21 in the polishing process, so that the abrasion of the elastic support piece 3 is reduced, and the service life of the elastic support piece 3 is prolonged.

Optionally, as shown in fig. 1 to 3 and fig. 5, the polishing plate includes a first polishing plate 4, a connecting hole 40 is formed on the first polishing plate 4, and the second end of the elastic supporting member 3 is inserted into the connecting hole 40. The first sanding plate 4 can be conveniently disassembled and assembled by adopting a splicing and matching mode, and the operation is simple, time-saving and labor-saving. Further, a plurality of connecting holes 40 are spaced apart along the circumferential direction of the first sanding plate 4.

In order to fit the shape of the elastic support 3, the mounting hole 21 and the connection hole 40 are each shaped as a kidney in the present embodiment. Of course, in other embodiments, the cross section of the elastic support 3 may also be rectangular, trapezoidal, or hexagonal, and the like, and is not limited herein.

Optionally, the first sanding plate 4 is a non-circular sanding plate. Further, the driver is a motor, a motor shaft of the motor is connected with an eccentric structure, the eccentric structure is connected with an output shaft, and the output shaft is connected with the non-circular polishing plate. Through the cooperation of the motor and the eccentric structure, the first polishing plate 4 can swing in a rail way, so that the first polishing plate 4 can perform swing polishing.

Alternatively, as shown in fig. 3 and 5, the first sanding plate 4 may be a rectangular sanding plate 41 or a triangular sanding plate 42. Depending on the actual sanding requirements, either the rectangular sanding plate 41 or the triangular sanding plate 42 may be mounted on the output shaft of the drive. Of course, in other embodiments, the first polishing plate 4 may also be a trapezoidal polishing plate, a diamond polishing plate, an oval polishing plate, and/or the like, which is not limited herein. Alternatively, in this embodiment, three sides of the triangular sanding plate 42 are curved.

As shown in fig. 6, the polishing plate provided in this embodiment further includes a second polishing plate 5, the second polishing plate 5 is a circular polishing plate, and the output shaft of the driver drives the second polishing plate 5 to rotate. As shown in fig. 6 and fig. 2 to 4, the sander provided in this embodiment further includes a damping ring 6, the damping ring 6 is disposed on the wind scooper 2 and sleeved outside the output shaft, and the damping ring 6 contacts with the top surface of the second sanding plate 5.

The second sanding plate 5 may perform rotary sanding, and the rectangular sanding plate 41 and the triangular sanding plate 42 may perform orbital swing sanding. The rectangular polishing plate 41, the triangular polishing plate 42 and the second polishing plate 5 are alternatively arranged on the output shaft of the driver, so that different polishing modes can be selected according to actual polishing requirements, and the application range of the polishing machine is expanded.

Because the second grinding plate 5 needs to do rotary motion when grinding, the second grinding plate 5 cannot be connected with the elastic support piece 3 when the second grinding plate 5 is installed, the damping ring 6 is additionally arranged, the damping ring 6 is in contact with the second grinding plate 5, the second grinding plate 5 can be prevented from vibrating up and down, the rotating speed of the second grinding plate 5 can be limited, and meanwhile the second grinding plate 5 can be decelerated when a power supply is cut off.

The present embodiment also provides an installation method of the grinding machine according to the above, the installation method including:

step 1, mounting a first end of an elastic support piece 3 in a mounting hole 21 of an air guide cover 2;

step 2, arranging the wind scooper 2 in the wind guide chamber 11 and sleeving the wind scooper outside the output shaft;

and 3, fixedly connecting the wind scooper 2 with the partition plate 111 through a fastener.

When the grinding plate is used, the grinding plate is arranged on the output shaft and used for grinding workpieces. It should be noted that, in the present embodiment, since the sanding plate includes the rectangular sanding plate 41 and the circular sanding plate of the triangular sanding plate 42, one of the rectangular sanding plate 41, the triangular sanding plate 42, and the circular sanding plate is selected to be mounted on the output shaft of the driver in step 3.

The mounting method of the grinding machine provided by the embodiment can simplify the mounting process of the grinding machine, ensure the mounting firmness of the elastic supporting piece 3, improve the assembly efficiency of the grinding machine and ensure the working stability of the grinding machine.

Since the sander provided in the present embodiment further includes the second sanding plate 5 and the damping ring 6, step 2 further includes: the damping ring 6 is arranged on the wind scooper 2 to form a wind guide assembly comprising the damping ring 6, the wind scooper 2 and the elastic support 3.

In this embodiment, since the housing 1 includes the left housing and the right housing, before the step 2, the method further includes: the driver is arranged in the left shell and the right shell, and the left shell and the right shell are fixedly connected. Specifically, in the present embodiment, the left housing and the right housing are fixed by screw connection.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A sander, comprising:

a housing having a drive disposed therein, the drive having an output shaft extending out of the housing along a first axis;

the wind guide cover is sleeved outside the output shaft and is detachably connected with the shell, and a mounting hole extending in parallel along the first axis is formed in the wind guide cover;

a first end of the elastic supporting piece is kept in a space between the machine shell and the air guide cover, and a second end of the elastic supporting piece extends out of the mounting hole;

and the grinding plate is arranged on the output shaft.

2. The sander of claim 1 wherein the enclosure comprises an air guide chamber, the air guide chamber being located in a bottom portion of the enclosure, the air guide shroud being located in the air guide chamber and connected to the enclosure.

3. The sander of claim 2 wherein the air-guide chamber comprises a partition and a through-hole in the partition through which the output shaft passes.

4. The sander of claim 3 further comprising a fastener that mounts the air scoop to the partition.

5. The sander of claim 3 wherein the enclosure comprises a dust exhaust duct for exhausting dust, the air guide housing further comprising a dust outlet disposed within the air guide chamber, the dust outlet communicating with the dust exhaust duct.

6. The sander of claim 1 wherein the first end of the resilient support is provided with a flange, the mounting hole is a stepped hole, and the bottom surface of the flange abuts the stepped surface of the stepped hole.

7. The sander according to claim 1, wherein the mounting hole extends along a second axis to penetrate through the air guide hood, and the first end of the elastic support is provided with a flange, and a projection of the flange along the direction of the second axis at least partially exceeds a projection of the mounting hole along the second axis.

8. The sander according to any of claims 1-7, wherein the sanding plate comprises a first sanding plate, wherein the first sanding plate is provided with a connecting hole, and the second end of the elastic support member is inserted into the connecting hole.

9. A sanding machine according to claim 8, characterized in that the first sanding plate is a rectangular sanding plate or a triangular sanding plate.

10. The sander of any of claims 1-7, wherein the sanding plate comprises a second sanding plate, the second sanding plate being a circular sanding plate, the output shaft of the driver rotating the second sanding plate;

the polisher further comprises a damping ring, the damping ring is arranged on the air guide cover and sleeved outside the output shaft, and the damping ring is in contact with the top surface of the second polishing plate.

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