Handheld electric round sand machine

Abstract

The utility model discloses a handheld electric round sanding machine which comprises a machine body shell for protecting internal parts and providing support and structural integrity. The abrasive paper disc is mounted at the lower end of the machine body shell and is used for polishing a workpiece; the motor serves as a power source and provides rotating torque; the connecting pipe is mounted at the lower end of the machine body shell; the dust collecting bag is rotationally clamped with the connecting pipe; an electromagnet module is arranged on the other side, away from the machine body shell, of the connecting pipe, at least one iron sheet is arranged at an inlet of the dust collection bag, and the electromagnet module attracts the iron sheets when started.

Description

Technical Field

[0001] The present application relates to the technical field of electric tools, and in particular to a handheld electric circular sander. Background Art

[0002] Traditional electric circular sanders generate a lot of dust during grinding and polishing, which not only affects the working environment and harms the health of operators, but also easily causes various occupational diseases when exposed to high-concentration dust for a long time. It is also not in line with the concept of green and environmental protection in modern industrial production. Therefore, how to effectively control and collect the dust generated by grinding has become a technical problem that needs to be solved urgently.

[0003] Based on this, there is a portable round sander as described in publication number CN217317433U, which includes: a housing; a motor; a support plate connected to the motor, the support plate being provided with at least two dust collecting holes; an upper plate connected between the support plate and the motor, the upper plate being provided with a bearing accommodating cavity and at least two dust collecting holes; a hollow chassis connected to the support plate, the hollow chassis being provided with at least two dust collecting holes, each dust collecting hole being interconnected through a hollow groove on the surface of the hollow chassis; and a power cord sleeve being movably connected to the housing through a rotatable connector. Adding a hollow groove to the chassis of the round sander and adopting a multi-layer chassis structure expands the space and area where dust is sucked in, helps to improve the dust collection efficiency, and enables the round sander to have better dust removal performance; in addition, its power cord sleeve is connected to the housing of the round sander in the form of a spherical connector, so that the power cord has a higher degree of freedom to deflect when in use, is less likely to interfere, and is easy to use.

[0004] However, in structures such as those described above, the dust bag is inconvenient to remove and there is a risk of it falling out during use. Therefore, the purpose of this application is to more conveniently and quickly remove the dust bag and prevent it from falling out during use.

[0005] The above contents are only used to assist in understanding the technical solution of the present application, and do not constitute an admission that the above contents are the closest prior art to the present application. Summary of the invention

[0006] Based on this, the present application provides a handheld electric circular sander to solve one of the above technical problems.

[0007] The technical solution adopted by the present application to solve its technical problems is: a body shell, which protects internal parts and provides support and structural integrity; a sandpaper disc, which is installed at the lower end of the body shell and is used to grind the workpiece; a motor, which serves as a power source and provides rotational torque; a connecting pipe, which is installed at the lower end of the body shell; a dust bag, which is rotatably connected to the connecting pipe; an electromagnet module is provided on the side of the connecting pipe away from the body shell, and there is at least one iron sheet at the inlet of the dust bag, and the electromagnet module adsorbs the iron sheet when it is started.

[0008] In some examples, a guide groove and a limit groove are provided inside the inlet of the dust bag.

[0009] In some examples, at least two limiting columns are disposed at one end of the connecting tube where the electromagnet module is disposed.

[0010] In some examples, the limiting post enters the limiting groove by sliding into the guide groove.

[0011] In some examples, the electromagnet module is connected to the motor, power supply and controller circuit, so that when the motor is started, the electromagnet module absorbs the iron sheet, making it impossible to remove the electric round sander normally during operation.

[0012] In some examples, at least one handle is disposed on the top of the housing.

[0013] In some examples, the sandpaper disc has a hollow dust collection hole in the middle for collecting dust.

[0014] In some examples, the outer contour of the end of the connecting tube connected to the dust bag is smaller than the inner contour of the inlet of the dust bag.

[0015] In some examples, the dust bag has a substantially cylindrical profile, and the dust bag is made of a hard material.

[0016] The beneficial effect of the present application is that the double insurance of the rotary clamping connection and the electromagnet connection greatly improves the safety and stability of the circular sanding machine during use, and when the circular sanding machine is shut down, the electromagnet stops and can be quickly disassembled and assembled through the rotary clamping structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the elevation structure of this application.

[0019] Figure 2 It is a schematic diagram of the explosion structure of this application.

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of this application.

[0021] Figure 4 It is a schematic diagram of the dust bag structure of the present application.

[0022] Explanation of the accompanying figures: 1. Body shell; 2. Sandpaper disc; 21. Dust collection hole; 3. Motor; 4. Connecting pipe; 41. Electromagnet module; 42. Limiting column; 5. Dust bag; 51. Iron sheet; 52. Guide groove; 53. Limiting groove; 6. Handle. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to achieve. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that the combination of such technical solutions does not exist and is not within the scope of protection of this application.

[0024] In the embodiments of this application, please refer to Figure 1-4 As shown, the present application provides a handheld electric circular sander, which mainly includes: a body shell 1, which protects internal parts and provides support and structural integrity; a sandpaper disc 2, which is installed at the lower end of the body shell 1 and is used to grind the workpiece; a motor 3, which serves as a power source and provides a rotational torque; a connecting pipe 4, which is installed at the lower end of the body shell 1; a dust bag 5, which is rotatably connected to the connecting pipe 4; an electromagnet module 41 is provided on the side of the connecting pipe 4 away from the body shell 1, and there is at least one iron sheet 51 at the inlet of the dust bag 5, and the electromagnet module 41 adsorbs the iron sheet 51 when it is started.

[0025] Specifically, when the electric circular sander is started, the motor 3 rotates, and the dust enters the connecting pipe 4 through the dust collecting hole 21 and then enters the dust bag 5, thereby achieving a dust collection effect and realizing continuous and effective dust collection during the sanding process. The electromagnet module 41 can lock the dust bag 5 and the connecting pipe 4 when the circular sander is started, thereby preventing the dust bag 5 from falling out and causing unexpected dangers.

[0026] Some preferred / improved embodiments based on the above embodiments will be described below. Any one of the following embodiments may be selected, or multiple embodiments may be selected and combined.

[0027] Reference Figure 4 As shown, a guide groove 52 and a limit groove 53 are provided inside the inlet of the dust collecting bag 5 to improve work efficiency and convenience.

[0028] Reference Figure 2 As shown, at least two limiting columns 42 are provided at one end of the connecting pipe 4 where the electromagnet module 41 is provided.

[0029] Specifically, the limiting column 42 enters the limiting groove 53 by sliding into the guide groove 52. This arrangement can firmly fix the dust bag 5 on the sand machine, and it will not easily loosen even if vibration occurs during use, thereby ensuring the stable operation of the entire dust collection system.

[0030] Reference Figure 3 The electromagnet module is connected to the motor, power supply and controller circuit. When the motor 3 is started, the electromagnet module 41 absorbs the iron sheet 51, so that the electric round sander cannot be taken out normally during work, achieving double insurance and greatly improving the safety of the use process.

[0031] Preferably, at least one handle 6 is provided on the top of the body shell 1. The handle 6 adopts an ergonomic design, which can effectively reduce the fatigue caused by long-term holding and improve the operator's work efficiency and comfort.

[0032] Preferably, the sandpaper disc 2 has a hollow dust collecting hole 21 in the middle for collecting dust to effectively improve the operator's observation and judgment accuracy of the work progress.

[0033] Furthermore, the outer contour of the end of the connecting tube 4 connected to the dust bag 5 is smaller than the inner contour of the inlet of the dust bag 5. With this arrangement, the dust bag 5 and the connecting tube 4 can be connected more easily.

[0034] Preferably, the dust bag 5 has a roughly cylindrical profile, and the dust bag is made of a hard material. Compared with other shapes, the cylindrical profile has better space utilization and can store more dust and debris in a limited space. Hard materials are generally more wear-resistant and scratch-resistant than flexible materials, and are not easily worn out by long-term contact with dust and fine particles generated by the sandpaper disc 2, thereby increasing the service life of the dust bag.

[0035] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present application, and the aforementioned embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A handheld electric round sander, characterized in that: include: The body shell protects the internal parts and provides support and structural integrity; A sandpaper disc, mounted at the lower end of the housing, for grinding the workpiece; The motor, as a power source, provides rotational torque; A connecting pipe is installed at the lower end of the housing; The dust bag is rotatably connected to the connecting pipe; An electromagnet module is arranged on the side of the connecting pipe away from the housing, and at least one iron sheet is arranged at the inlet of the dust bag. When the electromagnet module is started, the iron sheet is adsorbed.

2. A handheld electric round sander according to claim 1, characterized in that: A guide groove and a limit groove are arranged inside the inlet of the dust collecting bag.

3. A handheld electric round sander according to claim 2, characterized in that: At least two limiting columns are arranged at one end of the connecting pipe where the electromagnet module is arranged.

4. A handheld electric round sander according to claim 3, characterized in that: The limiting column enters the limiting groove by sliding into the guide groove.

5. A handheld electric round sander according to claim 1, characterized in that: The electromagnet module is connected to the motor, power supply and controller circuit, so that when the motor is started, the electromagnet module absorbs the iron sheet, so that the electric round sander cannot normally take out the dust bag when working.

6. A handheld electric round sander according to claim 1, characterized in that: At least one handle is arranged on the top of the housing.

7. A handheld electric round sander according to claim 1, characterized in that: A hollow dust collecting hole is arranged in the middle of the sandpaper disc for collecting dust.

8. A handheld electric round sander according to claim 1, characterized in that: The outer contour of the end of the connecting pipe connected to the dust bag is smaller than the inner contour of the inlet of the dust bag.

9. A handheld electric round sander according to claim 1, characterized in that: The dust bag has a roughly cylindrical outline, and the dust bag is made of a hard material.

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