Handheld convenient polisher for automobile maintenance

Abstract

The utility model discloses a hand-held portable sander for automobile maintenance, which comprises a circular truncated cone-shaped cover, a grinding wheel, a grinding wheel, a grinding wheel and a grinding wheel, and the grinding disc is arranged in the circular-truncated-cone-shaped cover and protrudes out of the bottom of the circular-truncated-cone-shaped cover, the top of the grinding disc is fixedly connected with an iron connecting base, and the iron connecting base is connected to the bottom end of an output shaft at the bottom of the double-shaft driving motor. By arranging a series of structures, synchronous dust suppression treatment can be integrally and automatically carried out on a grinding position in real time during grinding, the synchronism with the grinding position change can be ensured, the phenomenon that a large amount of dust directly drifts outwards to influence the environment and harm the body health of workers is reduced, the use safety and environment-friendly effects are improved, and the practicability is high. And the stainless steel filter screen cylinder can be conveniently disassembled, taken out, cleaned or replaced by personnel, the use flexibility is improved, the polishing disc can be conveniently disassembled, assembled and replaced in a simple pulling and inserting mode in cooperation with an external clamping tool in the follow-up process through another implementation mode, and the convenience of replacing the polishing disc in the follow-up process is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive repair technology, specifically a handheld portable grinder for automotive repair. Background Technology

[0002] Automotive sheet metal work is a technical method of car repair, referring to the repair of a car body after a collision. It also includes all work except for anti-corrosion and decorative painting of the car body, such as the analysis of car body damage, measurement of the car body, shaping of the car body sheet metal, stretching and straightening, stress-relieving welding, and assembly and adjustment of car body accessories.

[0003] When repairing scratches and dents in automotive sheet metal work, a grinding device is needed to grind the area to be repaired before painting. Handheld grinders used in automotive sheet metal work generate a large amount of dust during the grinding process. Furthermore, it is impossible to simultaneously suppress dust at the grinding location during grinding, allowing dust to easily disperse directly and in large quantities, affecting the environment and endangering workers' health, thus reducing safety and environmental protection benefits. Therefore, this application proposes a portable handheld grinder for automotive repair to solve the aforementioned problems. Utility Model Content

[0004] The purpose of this invention is to provide a handheld, convenient grinder for automotive repair, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a handheld portable grinder for automotive repair, comprising:

[0006] A frustum-shaped cover, with a dual-shaft drive motor embedded and fixed on its top inner wall;

[0007] A grinding disc is set inside a frustum-shaped cover and protrudes from the bottom of the frustum-shaped cover. An iron connecting seat is fixedly connected to the top of the grinding disc, and the iron connecting seat is connected to the bottom end of the output shaft of the dual-axis drive motor. The dual-axis drive motor is used to drive the grinding disc to rotate and perform grinding work during automobile repair.

[0008] The dust collection pipe is fixedly installed on the top of the frustum-shaped cover. The top of the dust collection pipe is threaded with an internal thread cap. The top of the internal thread cap is fixedly connected to a U-shaped handle. The right side of the dust collection pipe is fixedly connected to a handle rod. The U-shaped handle and handle rod are provided for the polisher to hold and support the pipe with both hands respectively, forming a two-point hand support effect.

[0009] The filter dust collection assembly is installed inside the dust collection pipe and makes movable contact with the top inner wall of the internal threaded cover;

[0010] The rotary suction assembly is fixedly connected to the top of the output shaft of the dual-axis drive motor and is located inside the dust collection pipe;

[0011] The suction and dust-venting assembly is connected and fixed to the outside of the dust collection pipe and surrounds the grinding disc; the rotary suction assembly is used to be driven to rotate by the dual-axis drive motor when it starts and to suck up the dust inside the dust collection pipe; the suction and dust-venting assembly is used to suck up the dust generated during grinding in a way that surrounds the grinding disc when the dust collection pipe is subjected to suction force; and the filter dust collection assembly is used to filter and collect the sucked-up dust.

[0012] Preferably, the iron connecting seat is fixedly connected to the bottom end of the output shaft at the bottom of the dual-axis drive motor by two screws.

[0013] Preferably, the top of the iron connecting seat has two screw holes, and the bottom of the grinding disc has two countersunk holes. The screws are movably inserted into the corresponding countersunk holes and screw holes. The output shaft at the bottom of the dual-axis drive motor has an integrally formed outer edge, and the bottom of the outer edge has two threaded holes. The screws are threaded into the corresponding threaded holes.

[0014] Preferably, the iron connecting seat is quickly connected to the bottom end of the output shaft at the bottom of the dual-axis drive motor.

[0015] Preferably, the top of the iron connecting seat is provided with a rectangular slot, and the bottom end of the output shaft of the dual-axis drive motor is fixedly connected to a rectangular block that is movably mounted in the rectangular slot. The bottom of the rectangular block is fixedly connected to a strong magnet that attracts to the inner wall of the bottom of the rectangular slot.

[0016] Preferably, the dust collection and filtration assembly includes a stainless steel filter cylinder movably fitted inside the dust collection tube. The top of the stainless steel filter cylinder is set as an opening, and a T-shaped tie rod is fixedly connected to the bottom inner wall of the stainless steel filter cylinder, which is in movable contact with the top inner wall of the internal threaded cover. A support ring is fixedly connected inside the dust collection tube, which is in movable contact with the bottom of the stainless steel filter cylinder.

[0017] Preferably, the rotary suction assembly includes a rotating shaft fixedly connected to the top of the output shaft of the dual-shaft drive motor, and a centrifugal impeller located below the stainless steel filter cylinder is fixedly mounted on the outside of the rotating shaft. When the centrifugal impeller rotates, the top of the impeller is the suction area.

[0018] Preferably, the suction and dust removal assembly includes multiple suction pipes that are connected and fixed to the outside of the dust collection pipe in a ring with equal spacing. The top of the suction pipe is located above the stainless steel filter cylinder. A frustum-shaped cover is fixedly fitted on the multiple suction pipes. The bottom of the suction pipe is set as a cover-shaped structure and is higher than the bottom of the grinding disc. The multiple suction pipes surround the grinding disc.

[0019] Preferably, four support rods are fixedly connected in a ring at equal intervals between the bottom end of the dust collection pipe and the top of the frustum-shaped cover.

[0020] Preferably, the top outer side of the dust collection pipe is provided with an external thread that is threaded to the internal thread cap.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. Through the combination of a frustum-shaped cover, a dual-axis drive motor, an iron connecting seat, a grinding disc, a dust collection pipe, an internal threaded cover, a filter dust collection component, a rotary suction component, and a suction and dust removal component, the dust suppression system can be integrated and automatically applied to the grinding position in real time during grinding. It can also ensure synchronization with the changes in the grinding position, reduce the phenomenon of dust directly and in large quantities drifting outward, affecting the environment and harming the health of workers, and improve the safety and environmental protection effect of use.

[0023] 2. With the internal threaded cover and dust collection pipe, the seal on the top of the dust collection pipe can be easily removed by turning it after use, making it convenient for personnel to disassemble, clean or replace the stainless steel filter screen, thus improving the flexibility of use.

[0024] 3. The dual-axis drive motor, iron connecting seat, strong magnet, rectangular block and rectangular slot are designed to facilitate the easy disassembly and replacement of the grinding disc by simply plugging and unplugging external clamping tools, thus improving the convenience of subsequent grinding disc replacement.

[0025] This utility model incorporates a series of structures that facilitate integrated, real-time, and automatic dust suppression at the grinding location during grinding, ensuring synchronization with changes in the grinding position. This reduces the direct and excessive dispersion of dust, minimizing its impact on the environment and worker health, thus improving safety and environmental protection. Furthermore, it allows for easy disassembly, cleaning, and replacement of the stainless steel filter cylinder, enhancing operational flexibility. Additionally, through another implementation method, it facilitates the subsequent disassembly and replacement of the grinding disc using external clamping tools via simple plug-and-play, further simplifying grinding disc replacement. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a handheld portable grinder for automobile repair proposed in Embodiment 1 of this utility model;

[0027] Figure 2 for Figure 1 A schematic diagram of the structure viewed from below;

[0028] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure;

[0029] Figure 4 for Figure 3 A schematic diagram of the structure viewed from below;

[0030] Figure 5This is a cross-sectional view of a handheld portable grinder for automobile repair proposed in Embodiment 2 of this utility model.

[0031] In the diagram: 1. Frustum-shaped cover; 2. Dust collection pipe; 201. Handle handle; 202. Internal threaded cover; 203. U-shaped handle; 204. Support ring; 3. Dual-shaft drive motor; 301. Rectangular locking block; 302. Strong magnet; 303. Rotating shaft; 304. Centrifugal impeller; 4. Grinding disc; 401. Iron connecting seat; 5. Stainless steel filter cylinder; 501. T-shaped pull rod; 6. Suction pipe. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1

[0034] like Figures 1 to 4 As shown in this embodiment, a handheld portable grinder for automotive repair includes:

[0035] A frustum-shaped cover 1 has a dual-axis drive motor 3 embedded and fixed on its top inner wall. The dual-axis drive motor 3 is powered by its own power cord being directly plugged into the field power strip. The top inner wall of the frustum-shaped cover 1 has an embedded through hole. The dual-axis drive motor 3 is located in the embedded through hole and does not contact the inner wall of the embedded through hole. A fixing sleeve is fixedly connected to the outside of the dual-axis drive motor 3. The bottom of the fixing sleeve has four bolt holes in a ring shape. Each of the four bolt holes has a fixing bolt that is movably inserted. The top inner wall of the frustum-shaped cover 1 has four threaded grooves that are screwed into the corresponding fixing bolts. The fixing sleeve and the four fixing bolts are used to fix the dual-axis drive motor 3 to the frustum-shaped cover 1.

[0036] The grinding disc 4 is set inside the frustum-shaped cover 1 and protrudes from the bottom of the frustum-shaped cover 1. The top of the grinding disc 4 is fixedly connected to an iron connecting seat 401, which is connected to the bottom end of the output shaft of the dual-axis drive motor 3. The dual-axis drive motor 3 is used to drive the grinding disc 4 to rotate for grinding work during automobile repair.

[0037] The dust collection pipe 2 is fixedly installed on the top of the frustum-shaped cover 1. Four support rods are fixedly connected in a ring at equal intervals between the bottom end of the dust collection pipe 2 and the top of the frustum-shaped cover 1, which serves to fix and support the dust collection pipe 2. The top of the dust collection pipe 2 is threaded with an internal thread cover 202. The top of the outer side of the dust collection pipe 2 has an external thread that is threaded to the internal thread cover 202. The top of the internal thread cover 202 is fixedly connected with a U-shaped handle 203. The right side of the dust collection pipe 2 is fixedly connected with a handle rod 201. The U-shaped handle 203 and the handle rod 201 are provided for the polisher to hold and support the pipe with both hands respectively, forming a two-point hand support effect to avoid the instability that is easy to occur when holding the pipe with one point.

[0038] The filter dust collection assembly is installed inside the dust collection pipe 2 and is in active contact with the top inner wall of the internal threaded cover 202;

[0039] The rotary suction assembly is fixedly connected to the top of the output shaft of the dual-axis drive motor 3 and located inside the dust collection pipe 2;

[0040] The suction and dust removal assembly is connected and fixed to the outside of the dust collection pipe 2 and surrounds the grinding disc 4.

[0041] In this embodiment, the rotary suction assembly is used to be driven to rotate by the dual-axis drive motor 3 when it starts and to suck up the dust collection pipe 2. The suction and dust removal assembly is used to suck up the dust generated by grinding in a way that surrounds the grinding disc 4 when the dust collection pipe 2 is subjected to suction force. The filter dust collection assembly is used to filter and collect the sucked-up dust.

[0042] It should be noted that the dual-axis drive motor 3 is a high-speed dual-axis drive motor, and its specific model is selected according to the actual application. The two different output shafts of the dual-axis drive motor 3 can independently provide driving force, which is a mature technology.

[0043] Furthermore, the iron connecting seat 401 is fixedly connected to the bottom end of the output shaft of the dual-axis drive motor 3 by two screws. The top of the iron connecting seat 401 has two screw through holes, and the bottom of the grinding disc 4 has two countersunk holes. The screws are movably inserted into the corresponding countersunk holes and screw through holes. The outer edge of the output shaft at the bottom of the dual-axis drive motor 3 is integrally provided, and the bottom of the outer edge has two threaded holes. The screws are threaded into the corresponding threaded holes.

[0044] Furthermore, referring to Figure 3 and Figure 4This handheld portable grinder for automotive repair also includes a dust collection and filtration assembly. The dust collection and filtration assembly includes a stainless steel filter cylinder 5 movably fitted inside the dust collection tube 2. The top of the stainless steel filter cylinder 5 is open, and a T-shaped pull rod 501 is fixedly connected to the bottom inner wall of the stainless steel filter cylinder 5, which movably contacts the top inner wall of the inner threaded cover 202. A support ring 204 is fixedly connected inside the dust collection tube 2, which movably contacts the bottom of the stainless steel filter cylinder 5. In this embodiment, the stainless steel filter cylinder 5, the T-shaped pull rod 501, and the support ring 204 work together to filter and intercept dust when dust gas is drawn into the dust collection tube 2. When the inner threaded cover 202 is subsequently rotated open, the T-shaped pull rod 501 allows personnel to easily remove the stainless steel filter cylinder 5 for cleaning or replacement. The support ring 204 is used to support and limit the movement of the stainless steel filter cylinder 5.

[0045] It should be noted that the stainless steel filter cylinder 5 is composed of a stainless steel cylindrical support frame and a filter sponge placed inside the stainless steel cylindrical support frame. The filter sponge is a standard feature in dust collection applications, and its specific structure will not be described in detail here. The stainless steel cylindrical support frame in the stainless steel filter cylinder 5 is fixed to the T-shaped pull rod 501, and the filter sponge is used to filter the downward-flowing dust gas.

[0046] Furthermore, referring to Figure 4 This handheld portable grinder for automotive repair also includes a rotary suction assembly. The rotary suction assembly includes a rotating shaft 303 fixedly connected to the top of the output shaft of the dual-axis drive motor 3. A centrifugal impeller 304 located below the stainless steel filter cylinder 5 is fixedly mounted on the outside of the rotating shaft 303. When the centrifugal impeller 304 rotates, the top of the centrifugal impeller 304 is the suction area. In this embodiment, through the cooperation of the rotating shaft 303 and the centrifugal impeller 304, when the dual-axis drive motor 3 starts to perform grinding work, it also drives the rotating shaft 303 to rotate through the top output shaft. The rotating shaft 303 drives the centrifugal impeller 304 to rotate. When the centrifugal impeller 304 rotates, it sucks the inside of the dust collection pipe 2 and discharges the sucked gas through the space at the bottom of the dust collection pipe 2.

[0047] It should be noted that the output shaft at the top of the dual-shaft drive motor 3 provides rotational driving force to the centrifugal impeller 304 through the rotating shaft 303, and the dust and air flow from the top to the bottom of the centrifugal impeller 304 during rotation.

[0048] Furthermore, referring to Figure 4This handheld portable grinder for automotive repair also includes a dust extraction and ventilation assembly. The dust extraction and ventilation assembly includes multiple suction pipes 6 that are connected and fixed in a ring at equal intervals on the outside of the dust collection pipe 2. The top of the suction pipes 6 is located above the stainless steel filter cylinder 5. A frustum-shaped cover 1 is fixedly fitted on the multiple suction pipes 6. The bottom of the suction pipes 6 is set as a cover-shaped structure and is higher than the bottom of the grinding disc 4. The multiple suction pipes 6 surround the grinding disc 4. In this embodiment, when the dust is drawn into the dust collection pipe 2 by the multiple suction pipes 6, the dust generated during grinding can be directly drawn into the dust collection pipe 2 in a way that surrounds the grinding disc 4. The dust and gas are then introduced into the dust collection pipe 2. By surrounding the grinding position and drawing in dust, the phenomenon of a large amount of dust drifting outward and affecting the environment and harming the health of personnel is reduced, thus improving the environmental friendliness of the product.

[0049] This embodiment facilitates real-time automatic dust suppression at the grinding position during grinding, and ensures synchronization with changes in the grinding position. This reduces the direct and large-scale dispersion of dust, which can affect the environment and harm workers' health, thus improving safety and environmental protection. It also allows for easy disassembly, cleaning, or replacement of the stainless steel filter cylinder 5, increasing its flexibility.

[0050] The usage method of this embodiment is as follows: When using this handheld portable grinder for automobile repair, the U-shaped handle 203 and handle bar 201 are provided for the grinder to hold and support with both hands respectively, forming a two-point handholding and stable support effect, avoiding the instability that is easy to occur when holding with a single point. When grinding, the dual-axis drive motor 3 is started to drive the iron connecting seat 401 to rotate. The iron connecting seat 401 drives the grinding disc 4 to rotate, and performs the position grinding work after the sheet metal of the automobile surface.

[0051] The dual-shaft drive motor 3 starts its top output shaft, which in turn drives the rotating shaft 303 to rotate. The rotating shaft 303 drives the centrifugal impeller 304 to rotate. When the centrifugal impeller 304 rotates, it draws in the dust collection pipe 2. Under the suction force, the dust collection pipe 2 draws in the dust generated by grinding through multiple suction pipes 6 in a way that surrounds the grinding disc 4. The dust and gas are then introduced into the dust collection pipe 2. The stainless steel filter cylinder 5 filters, intercepts, and collects the dust. The gas is drawn in by the centrifugal impeller 304 and discharged through the space at the bottom of the dust collection pipe 2. Because it is an integrated unit, it can continuously follow the change of the grinding position and synchronously change the suction position during grinding. It is always in a state of surrounding the grinding position to collect dust, achieving the effect of integrated real-time automatic synchronous dust suppression treatment of the grinding position during grinding. This reduces the phenomenon of dust directly and in large quantities drifting outward, affecting the environment and harming the health of workers, and improves the safety and environmental protection effect of use.

[0052] When the stainless steel filter cylinder 5 needs to be removed for cleaning or replacement, rotate the inner threaded cover 202 in the opposite direction to separate it from the dust collection pipe 2 and remove the obstruction of the T-shaped pull rod 501. At this time, the T-shaped pull rod 501 can be pulled up to move the stainless steel filter cylinder 5 upward, which facilitates the subsequent disassembly, cleaning or replacement of the stainless steel filter cylinder 5 and improves the flexibility of use.

[0053] Example 2

[0054] Reference Figure 5 This embodiment differs from Embodiment 1 in that: the iron connecting seat 401 is quickly connected to the bottom end of the output shaft of the dual-axis drive motor 3; a rectangular slot is provided on the top of the iron connecting seat 401; a rectangular locking block 301 is fixedly connected to the bottom end of the output shaft of the dual-axis drive motor 3, which is movably locked in the rectangular slot; a strong magnet 302 is fixedly connected to the bottom of the rectangular locking block 301, which attracts to the inner wall of the bottom of the rectangular slot; the rectangular slot, the rectangular locking block 301, and the strong magnet 302 work together to achieve... The grinding disc 4 is conveniently magnetically fixed to the strong magnet 302 via the iron connecting seat 401 and the rectangular locking block 301, achieving a convenient magnetic connection between the grinding disc 4 and the output shaft at the bottom of the dual-axis drive motor 3. Utilizing the magnetic locking connection method, the iron connecting seat 401 can be separated from the rectangular locking block 301 and the strong magnet 302 by applying downward force to the grinding disc 4. This facilitates subsequent clamping, pulling down, disassembly, and replacement of the grinding disc 4 using external clamping tools, thereby improving the efficiency of subsequent grinding disc 4 replacement.

[0055] This embodiment facilitates the subsequent disassembly and replacement of the grinding disc 4 by simple plugging and unplugging with external clamping tools, thus improving the convenience of subsequent replacement of the grinding disc 4.

[0056] The usage method of this embodiment differs from that of Embodiment 1 in that it also has the following functions: The rectangular slot, rectangular block 301, and strong magnet 302 are used to magnetically fix the grinding disc 4. When the dual-axis drive motor 3 starts, it can drive the rectangular block 301 to rotate, which in turn drives the iron connecting seat 401 to rotate, thereby driving the grinding disc 4 to rotate for grinding. Because of the magnetic fixing method, when the grinding disc 4 needs to be disassembled or replaced later, an external clamping tool can be used directly. The grinding disc 4 is clamped and pulled down. As the grinding disc 4 is pulled down, it moves downward, causing the iron connecting seat 401 to separate from the rectangular locking block 301 and the strong magnet 302. The disassembly is complete. During installation, the new grinding disc 4 is moved upward, causing the iron connecting seat 401 on its top to move upward. The iron connecting seat 401 causes the rectangular locking slot to fit onto the rectangular locking block 301 and attracts the strong magnet 302. The installation is complete, which facilitates the subsequent disassembly and replacement of the grinding disc 4 and improves the convenience of subsequent replacement of the grinding disc 4.

[0057] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hand-held portable sander for automotive repair, comprising a circular-truncated-cone-shaped casing (1), characterized in that: Include: The inner wall of the top of the circular table-shaped cover (1) is embedded and fixed with a double-shaft driving motor (3); The polishing disc (4) is arranged in the circular table-shaped cover (1) and protrudes from the bottom of the circular table-shaped cover (1), the top of the polishing disc (4) is fixedly connected with an iron connecting seat (401), and the iron connecting seat (401) is connected to the bottom end of the output shaft at the bottom of the double-shaft driving motor (3); The dust collecting pipe (2) is fixedly installed at the top of the circular table-shaped cover (1), the outer side of the top end of the dust collecting pipe (2) is threadedly sleeved with an internally threaded cover (202), and the right side of the dust collecting pipe (2) is fixedly connected with a handle rod (201); The filter dust collecting assembly is installed in the dust collecting pipe (2) and is in movable contact with the top inner wall of the internally threaded cover (202); The rotating suction assembly is fixedly connected to the top end of the output shaft at the top of the double-shaft driving motor (3) and is located in the dust collecting pipe (2); The suction dust passing assembly is fixedly connected outside the dust collecting pipe (2) and surrounds the polishing disc (4); The filter dust collecting assembly includes a stainless steel filter screen cylinder (5) movably sleeved in the dust collecting pipe (2), the top of the stainless steel filter screen cylinder (5) is provided as an opening, the bottom inner wall of the stainless steel filter screen cylinder (5) is fixedly connected with a T-shaped pull rod (501) in movable contact with the top inner wall of the internally threaded cover (202), and the dust collecting pipe (2) is fixedly connected with a supporting ring (204) in movable contact with the bottom of the stainless steel filter screen cylinder (5); The suction dust passing assembly includes a plurality of dust collecting pipes (6) fixedly connected outside the dust collecting pipe (2) in a ring shape and at equal intervals, the top end of the dust collecting pipe (6) is located above the stainless steel filter screen cylinder (5), the circular table-shaped cover (1) is fixedly sleeved on the plurality of dust collecting pipes (6), the bottom end of the dust collecting pipe (6) is provided in a cover-shaped structure and is higher than the bottom position of the polishing disc (4), and the plurality of dust collecting pipes (6) surround the polishing disc (4).

2. A hand-held portable sander for automotive repair as defined in claim 1 wherein: The iron connecting seat (401) is fixedly connected to the bottom end of the output shaft at the bottom of the double-shaft driving motor (3) through two screws.

3. A hand-held portable sander for automotive repair as defined in claim 2 wherein: Two screw through holes are formed in the top of the iron connecting seat (401), two countersunk holes are formed in the bottom of the polishing disc (4), screws are movably inserted into the corresponding countersunk holes and screw through holes, and an outer edge is integrally arranged on the outer side of the output shaft at the bottom of the double-shaft driving motor (3), two threaded holes are formed in the bottom of the outer edge, and the screws are threadedly connected into the corresponding threaded holes.

4. The hand-held portable sander for automobile repair of claim 1, wherein: The iron connecting seat (401) is quickly detachably connected to the bottom end of the output shaft at the bottom of the double-shaft driving motor (3).

5. A hand-held portable sander for automotive repair as defined in claim 4 wherein: A rectangular clamping groove is formed in the top of the iron connecting seat (401), a rectangular clamping block (301) movably clamped in the rectangular clamping groove is fixedly connected to the bottom end of the output shaft at the bottom of the double-shaft driving motor (3), and a strong magnet (302) is fixedly connected to the bottom of the rectangular clamping block (301) and is attracted to the inner wall of the bottom of the rectangular clamping groove.

6. The hand-held portable sander for automobile repair of claim 1, wherein: The rotating suction assembly includes a rotating shaft (303) fixedly connected to the top end of the output shaft at the top of the double-shaft driving motor (3), a centrifugal impeller (304) located below the stainless steel filter screen cylinder (5) is fixedly sleeved on the outer side of the rotating shaft (303), and the top of the centrifugal impeller (304) is an air suction area when the centrifugal impeller (304) rotates.

7. The hand-held portable sander for automobile repair of claim 1 wherein: Four supporting rods are fixedly connected in a ring shape and at equal intervals between the bottom end of the dust collecting pipe (2) and the top of the circular truncated cone cover (1).

8. The hand-held portable sander for automobile repair of claim 1, wherein: An outer thread is formed on the top of the outer side of the dust collecting pipe (2) and is in threaded connection with an inner thread cover (202), and the top of the inner thread cover (202) is fixedly connected with a U-shaped handle (203).

Images