Sanding machine

Abstract

A bearing seat is arranged on the neck portion of a fan, a friction plate is arranged on the upper portion of the bearing seat, and the fan is provided with a first position separated from the friction plate and a second position matched with the friction plate. The sanding machine provided by the embodiment has two motion states, the rotation speed of the working head is increased, the polishing efficiency is improved, a user is helped to improve the working efficiency, and the working time is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a sanding machine. Background Art

[0002] Sanders are gaining increasing attention as a type of grinding and polishing tool. The sander's housing houses the motor and eccentric mechanism, while a base plate, mounted outside the housing, holds sandpaper. The motor drives the eccentric mechanism, which in turn drives the base plate to rotate, revolve, or both about the motor's axis, thereby grinding and polishing the workpiece with the sandpaper.

[0003] Currently, sanders have the problem of slow rotation speed and low grinding efficiency, which causes users to spend a lot of time grinding a material. Summary of the Invention

[0004] In order to solve the above problems, the utility model provides a sanding machine which increases the rotation speed of the chassis and further improves the sanding efficiency.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A sanding machine comprises a casing and a motor housed in the casing, the motor having a motor shaft and driving a working head to move through the motor shaft, characterized in that: a fan is provided on the motor shaft, the fan having blades perpendicular to the motor shaft and a neck parallel to the motor shaft, and the fan is eccentrically arranged relative to the motor shaft; a bearing and a bearing seat cooperating with the bearing are provided on the neck of the fan; the lower part of the bearing seat is fixedly connected to the working head, and the upper part of the bearing seat is provided with a friction plate; the fan has a first position separated from the friction plate and a second position cooperating with the friction plate.

[0007] According to one aspect of the present invention, the friction plate protrudes axially from the surface of the bearing seat and faces the end face of the fan blade.

[0008] According to one aspect of the present invention, the distance that the friction plate protrudes axially from the surface of the bearing seat is smaller than the distance between the bearing seat and the end face of the fan blade.

[0009] According to one aspect of the present invention, the axial length of the neck of the fan is greater than the axial length of the bearing.

[0010] According to one aspect of the present invention, the axial length of the neck of the fan is greater than the axial length of the bearing seat.

[0011] According to one aspect of the present invention, when located at the second position, the friction plate presses against the fan, and the fan drives the friction plate and the bearing seat to rotate.

[0012] According to one aspect of the present invention, the end surface of the fan where the blades are located cooperates with the friction plate.

[0013] According to one aspect of the present invention, an end cover is fixedly connected between the bearing seat and the working head.

[0014] According to one aspect of the present invention, the working head includes a chassis and sandpaper installed on the chassis.

[0015] According to one aspect of the present invention, the friction plate is a rubber piece.

[0016] Compared with the prior art, the beneficial effects of the present invention are described in detail below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is the overall structure diagram of the sanding machine in the embodiment of the utility model;

[0019] Figure 2 This is a partial cross-sectional view of a sanding machine in an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the first position of the sanding machine fan in an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the second position of the sander fan in an embodiment of the present invention.

[0022] In the figure: 1. Fan; 2. Friction plate; 3. Bearing seat; 4. Bearing; 5. Gasket; 6. Chassis; 7. Screws; 8. End cover; 9. Motor shaft; 10. Casing; 11. Motor. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Those skilled in the art will appreciate that, unless there is any conflict, the features in the following embodiments and implementations may be combined with each other.

[0025] The terms used in this utility model are for the purpose of describing specific embodiments only and are not intended to limit the utility model. For example, the terms "upper," "lower," "front," and "rear" used below to indicate positions or locations are based on the positions or locations shown in the accompanying drawings and are used only to facilitate the description of the utility model and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation or be constructed or operated in a specific orientation. Therefore, they should not be understood as limiting the utility model.

[0026] As used in this specification, the singular forms "a," "an," and "the" include plural referents, and the plural form "a plurality" includes more than two referents, unless the context clearly indicates otherwise. As used in this specification, the term "or" is generally used to include "and / or," unless the context clearly indicates otherwise. The terms "mounted," "connected," and "connected" should be broadly construed, meaning, for example, fixedly connected, removably connected, or integrally connected. Connections can be direct or indirect through an intermediary, and can encompass internal communication between two components or an interaction between two components.

[0027] The embodiment of the present utility model provides a sanding machine, such as Figure 1 As shown, it includes a casing 10 located at the upper part and a working head arranged outside the casing 10 and located outside the casing 10. In this embodiment, the working head includes a chassis 6 and sandpaper installed on the chassis 6.

[0028] The embodiment provides a sanding machine, such as Figure 2 As shown, the motor 11 is also included in the housing 10. The motor 11 provided in this embodiment is designed to be perpendicular to the chassis 6, and a motor shaft 9 is provided at the output end of the lower end.

[0029] The sanding machine provided in this embodiment also includes a fan 1, such as Figure 2-4 As shown, the fan 1 has a blade portion perpendicular to the motor shaft and a neck portion parallel to the motor shaft, forming a roughly T-shape. The fan 1 is located on the motor shaft 9, near the lower end of the motor shaft 9. At the distal end near the lower end, the fan 1 is secured to the motor shaft 9 via a washer 5 and a screw 7. Therefore, when the motor shaft 9 rotates, the fan 1 rotates synchronously with it.

[0030] Fan 1 is eccentrically positioned relative to motor shaft 9. Eccentric positioning refers to fan 1 having a central axis that is parallel to the rotational axis of motor shaft 9, with a distance d between them. Distance d allows fan 1 to transfer the rotation of motor shaft 9 into rotation and revolution of other components connected to fan 1 when motor shaft 9 rotates.

[0031] A bearing 4 and a bearing seat 3 that cooperates with the bearing 4 are provided on the neck of the fan 1. An end cover 8 is fixedly connected to the lower part of the bearing seat 3. Further, the end cover 8 is fixedly connected to the working head, so the motor shaft 9 starts to rotate to drive the fan 1 to rotate synchronously. The bearing 3 and the motor shaft 9 show a relative rotation motion mode, and the working head makes a relative rotation relative to the motor shaft 9 and the fan 1 to grind the working surface.

[0032] A friction plate 2 is provided on the upper portion of the bearing seat 3. The friction plate, as an intermediate component for transmitting motion, can be made of a certain elastic material, or can be made of other feasible materials known to those skilled in the art, such as soft plastics such as TPE. In this embodiment, a rubber member is preferably used. The friction plate 2 protrudes from the surface of the bearing seat 3 along the axial direction of the motor shaft and extends toward the end face of the fan blade. The distance that the friction plate 2 protrudes axially from the surface of the bearing seat 3 is less than the distance between the bearing seat 3 and the end face of the fan blade. Therefore, when the sanding machine is in accordance with Figure 1 When held or placed normally, the friction plate and the fan are in the first position separated by the force of gravity. In order to allow the fan 1 to move axially when the sander is pressed down, the axial length of the fan neck is set to be greater than the axial length of the bearing or further greater than the axial length of the bearing seat. When the work head is placed on the work surface, the sander is pressed down to cause the fan to move downward until it reaches the second position where it cooperates with the friction plate. When in the second position, the friction plate 2 presses against the fan 1. Specifically, the friction plate 2 presses against the end surface of the fan 1 where the blades are located. At this time, the friction plate and the fan are relatively fixed, and the fan drives the friction plate and the bearing seat to rotate. Since the fan rotates clockwise, the fan will give the friction plate a clockwise torque. This torque can increase the rotational drive torque of the chassis, which also rotates clockwise, thereby increasing the rotation speed of the chassis.

[0033] The fan in this embodiment is located in the first position, at which time the fan and the friction pad are disengaged, the rotation speed of the working head remains unchanged, and this position is the first working state of non-grinding; the fan is located in the second position, at which time the fan and the friction pad are engaged, the rotation speed of the working head increases, and this position is the second working state of grinding.

[0034] Therefore, the sanding machine provided in this embodiment has two motion states and increases the rotation speed of the working head, thereby improving the sanding efficiency, helping users improve work efficiency and save working time.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art will understand that the present invention includes, but is not limited to, the contents described in the above specific embodiment. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. A sanding machine comprising a housing and a motor housed in the housing, wherein the motor has a motor shaft and drives a working head to move via the motor shaft, characterized in that: A fan is provided on the motor shaft, and the fan has blades perpendicular to the motor shaft and a neck parallel to the motor shaft, and the fan is eccentrically arranged relative to the motor shaft; a bearing and a bearing seat cooperating with the bearing are provided on the neck of the fan; the lower part of the bearing seat is fixedly connected to the working head, and a friction plate is provided on the upper part of the bearing seat; the fan has a first position separated from the friction plate and a second position cooperating with the friction plate.

2. A sanding machine according to claim 1, characterized in that: The friction plate protrudes axially from the surface of the bearing seat and faces the end face of the fan blade.

3. A sanding machine according to claim 2, characterized in that: The distance that the friction plate protrudes axially from the surface of the bearing seat is smaller than the distance between the bearing seat and the end face of the fan blade.

4. A sanding machine according to claim 3, characterized in that: The axial length of the neck of the fan is greater than the axial length of the bearing.

5. A sanding machine according to claim 3, characterized in that: The axial length of the neck of the fan is greater than the axial length of the bearing seat.

6. A sanding machine according to claim 1, characterized in that: When located at the second position, the friction plate presses against the fan, and the fan drives the friction plate and the bearing seat to rotate.

7. A sanding machine according to claim 6, characterized in that: The end surface of the fan where the blades are located is matched with the friction plate.

8. A sanding machine according to claim 1, characterized in that: An end cover is fixedly connected between the bearing seat and the working head.

9. The sanding machine according to claim 1, characterized in that: The working head comprises a chassis and sandpaper mounted on the chassis.

10. The sanding machine according to claim 1, characterized in that: The friction plate is a rubber piece.

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