WO2022068131A1

WO2022068131A1 - Novel grinding machine

Info

Publication number: WO2022068131A1
Application number: PCT/CN2021/074386
Authority: WO
Inventors: 叶志浩; 李挺进; 徐宛柘; 潘旭峰; 周浩; 陈敏
Original assignee: 浙江博来工具有限公司
Priority date: 2020-09-30
Filing date: 2021-01-29
Publication date: 2022-04-07
Also published as: CN112388416A

Abstract

A novel grinding machine, comprising a grinding disc (18), a support (15), and a main handle (16). A rotating base (10) is provided on the grinding disc (18); the support (15) is movably connected to the rotating base (10) by means of a locking member (8) to form a rotating fulcrum (9) between the grinding disc (18) and the support (15); the main handle (16) is movably connected to the other end of the support (15); a driving mechanism (20) is further comprised; the driving mechanism (20) is vertically arranged above the grinding disc (18); the center of gravity of the driving mechanism (20) is located above the grinding disc (18). Compared with a traditional horizontal motor provided on a grinding disc and having lower center pf gravity, the grinding machine of the present invention can be flexibly switched to grind a wall and a ceiling, is time-saving and labor-saving, and is switched without using a tool, thereby improving grinding efficiency and user experience, and facilitating promotion and application in the market.

Description

new grinder

technical field

The invention relates to the technical field of wall grinding machines, in particular to a novel grinding machine.

Background technique

The wall grinder is a tool that replaces traditional workers with sandpaper to polish walls and objects, in order to achieve the purpose of leveling, dust-free, and protecting the physical and mental health of workers, optimize the working environment, improve work efficiency, and improve the quality of decoration, Wall grinding is divided into dust grinding and dust-free grinding. The machines for grinding walls are collectively referred to as wall grinding machines, also known as "wall grinding machines", "wall polishing machines", "putty grinding machines" and "wall grinding machines". , "Big White Grinding Machine", "Vacuum Sanding Machine", "Sanding Machine", the names vary from place to place, and the standard name is wall grinding machine.

The drive mechanism of the traditional sander is usually set horizontally at the upper center of the sanding disc, which makes it difficult for the sanding disc to switch between the sanding wall and the top of the wall, which is not smooth and flexible, and sometimes requires tools to be used for it. Switching leads to low grinding efficiency, reduces user experience, and is not conducive to the promotion and application of the above grinding machine in the market.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned defects in the prior art, the purpose of the invention of the present invention is to provide a novel grinding machine, which has an ingenious structure, can be flexibly switched between grinding the wall and the wall top, saves time and effort, and is tool-free for switching, improving the The grinding efficiency enhances the user's grinding experience, which is conducive to the promotion and application of the above grinding machines in the market.

In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions: a novel grinding machine, comprising a grinding disc, a support and a main handle, the grinding disc is provided with a rotating seat, and the support is movably connected to the rotating through a locking member and form the rotating fulcrum of the grinding disc and the bracket, the main handle can be movably connected to the other end of the bracket; it also includes a driving mechanism, the driving mechanism is standing above the rotating fulcrum and the driving mechanism The center is located on the upper side of the pivot point. By placing the drive mechanism above the rotation fulcrum, and the standing position is above the rotation fulcrum, that is, the center of gravity of the drive mechanism is on the upper side of the rotation fulcrum and on the upper side of the grinding disc, which is different from the traditional horizontal grinding. Compared with the motor with the lower center of gravity in the center of the disc, the grinding machine can be flexibly switched between grinding the wall and the top of the wall, saving time and effort, and tool-free switching, which improves the grinding efficiency and enhances the user's grinding experience, which is beneficial to The promotion and application of the above grinding machine in the market.

As a preferred solution of the present invention, the rotation fulcrum is located on the central axis of the grinding disc. The rotating fulcrum is set on the central axis of the grinding disc, so that the force applied to the grinding disc is more uniform, the grinding effect of the grinding disc is better, and the user experience can be further enhanced.

As a preferred solution of the present invention, the central axis of the driving mechanism and the central axis of the grinding disc are arranged parallel to each other, and the distance between the central axis of the driving mechanism and the central axis of the grinding disc Less than 2/3 of the diameter of the grinding disc. It can effectively ensure the stability of the driving mechanism in the process of driving the grinding disc to rotate, and further ensure the grinding effect of the grinding disc.

As a preferred solution of the present invention, an auxiliary handle is also included, and the auxiliary handle is detachably connected to the main handle. The length of the auxiliary handle can be freely changed according to the needs of the user, so that the utilization rate of the grinding machine is wider and the user experience can be further enhanced.

As a preferred solution of the present invention, the central axes of the rotation fulcrum, the bracket, the main handle and the auxiliary handle are all located on the same straight line. When the traditional grinding machine is grinding, the force applied to the grinding disc is often not uniform, and the grinding disc will have problems such as beating, laborious, and insufficient flexibility during the moving process. The central axis of the grinding machine is set on the same straight line, which can effectively solve the above technical problems, and can also greatly improve the grinding efficiency, save time and effort, reduce the operation difficulty of the grinding machine, and enhance the user experience.

As a preferred solution of the present invention, a movable rod is further provided at the rotating seat, and the movable rod is detachably penetrated through the rotating seat. By setting the movable rod, the bracket is detachably installed at the rotating seat, which saves time and effort, reduces the difficulty of installation, and further ensures the use effect of the grinding machine.

As a preferred solution of the present invention, the grinding disc is provided with a detachable grinding disc cover on the side and a grinding disc cover above, and the grinding disc cover is provided with a dust outlet, and a dust suction hose is arranged at the dust outlet. The setting of the detachable grinding disc cover and the grinding disc cover further protects the grinding disc, and at the same time ensures the use effect of the grinding disc, and reduces the probability of the grinding disc jumping during the grinding process. The dust is centrally processed and dumped, which further ensures the cleanliness of the use environment of the grinding disc and enhances the user experience.

As a preferred solution of the present invention, a head casing is arranged between the rotating seat and the grinding disc, a large gear is installed in the head casing, and the teeth of the output shaft of the driving mechanism drive the large gear. Compared with the traditional gear, the gear ratio of the large gear becomes larger, and the transmission efficiency is higher, and the setting of the large gear further ensures the stability of the grinding disc during the grinding and rotation process, and ensures the use effect of the grinding machine.

As a preferred solution of the present invention, the number of teeth of the motor shaft of the driving mechanism is 3 teeth. Gear teeth matching the large gear are formed on the output shaft, and the number of teeth is 3, so that the gear ratio becomes larger and the transmission efficiency is higher.

As a preferred solution of the present invention, a large end cover is further provided between the rotating seat and the grinding disc, the large end cover and the head shell form a cavity, and the large gear is installed in the inside the cavity. Reduce the impact of external substances on the large gear, ensure the service life of the large gear, and reduce the user's cost of use.

As a preferred solution of the present invention, the drive mechanism includes a stator, a rotor, and a cooling fan blade, and the cooling fan blade is installed on the other end of the rotor that rotates at a reduced speed. Installing the cooling fan blade on the other end of the rotor deceleration transmission can effectively reduce the running stability of the driving mechanism, improve the performance and service life of the driving mechanism, and further ensure the use effect of the grinding machine.

As a preferred solution of the present invention, the driving mechanism further includes a casing and a cooling fan, and the stator, the rotor, and the cooling fan are all installed in the casing. The setting of the casing further ensures the service life of the stator, rotor, cooling fan and rotor commutator arranged in it, and reduces the influence of external substances on the stator, rotor and cooling fan.

As a preferred solution of the present invention, a rear cover is provided on the outer cover of the driving mechanism away from the grinding disc, and the driving mechanism is installed in the rear cover. The setting of the rear cover plays the role of protecting the motor, further ensuring the service life of the driving mechanism, and reducing the cost of use for users. application.

Compared with the prior art, the beneficial effects of the novel grinding machine of the present invention are: the novel grinding machine of the present invention is driven by placing the driving mechanism above the rotating fulcrum, and the standing position is above the bracket. The center of gravity of the mechanism is on the upper side of the rotating fulcrum and the upper side of the grinding disc. Compared with the traditional horizontal motor whose center of gravity is below the center of the grinding disc, the grinding machine can be flexibly moved between the grinding wall and the top of the wall. Switching, saving time and effort, and tool-free switching, improves the grinding efficiency, enhances the user's grinding experience, and is conducive to the promotion and application of the above grinding machine in the market.

Description of drawings

Fig. 1 is the structural front view of the novel grinding machine in the embodiment of the present invention;

Fig. 2 is the structure top view of the novel grinding machine in the embodiment of the present invention;

Fig. 3 is the structural disassembly schematic diagram of the novel grinding machine in the embodiment of the present invention;

4 is a cross-sectional view of the structure at the grinding disc in the novel grinding machine in the embodiment of the present invention;

5 is a sectional view of the connection structure of the drive mechanism and the grinding disc in the novel grinding machine in the embodiment of the present invention;

Fig. 6 is the structural sectional view of D in Fig. 5;

7 is a three-dimensional view of the connection structure between the drive mechanism and the grinding disc in the novel grinding machine in the embodiment of the present invention;

8 is a schematic diagram of the use state of the top of the novel sander in the embodiment of the present invention;

FIG. 9 is a schematic diagram of the use state of the novel grinding machine for grinding the side wall in the embodiment of the present invention.

Reference numerals: 1, stator; 2, rotor; 3, cooling fan; 4, casing; 5, rear cover; 6, rotor commutator; 7, movable rod; 8, locking piece; 9, rotation fulcrum ;10. Rotary seat; 11. Head shell; 12. Large gear; 13. Grinding disc cover; 14. Removable grinding disc cover; 15. Bracket; 16. Main handle; 17. Secondary handle; 18. Grinding disc; 19. Large End cover; 20. Drive mechanism; 21. Dust outlet; 22. Dust suction hose.

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example: As shown in Figures 1 to 9, the new type of grinding machine includes a grinding disc 18, a bracket 15 and a main handle 16. The above-mentioned grinding disc 18 is provided with a rotation that can freely rotate between the grinding disc 18 and the bracket 15. The seat 10, the above-mentioned bracket 15 can be movably connected to the above-mentioned rotating seat 10 through the locking member 8 and form the rotating fulcrum 9 of the above-mentioned grinding disc 18 and the bracket 15, and the locking member 8 can be a simple-structured locking screw or locking bolt, etc. , while being convenient for installation, it reduces the manufacturing cost of the grinder, thereby reducing the user's cost of use. The above-mentioned main handle 16 can be movably connected to the other end of the above-mentioned bracket 15. When the grinder is not in use, the main handle 16 can be removed from the The bracket 15 is removed from the top, which is convenient for placing the grinding machine and reduces the space occupied by the grinding machine.

The rotating fulcrum 9 is located on the central axis of the grinding disc 18, and the rotating fulcrum 9 is set on the central axis of the grinding disc 18, so that the force applied to the grinding disc 18 is more uniform, and the grinding effect of the grinding disc 18 is better, which can further enhance the User experience.

The central axis of the driving mechanism 20 and the central axis of the grinding disc 18 are arranged parallel to each other, and the distance C between the central axis of the driving mechanism 20 and the central axis of the grinding disc 18 is less than 2/3 of the diameter B of the grinding disc 18, It can effectively ensure the stability of the driving mechanism 20 in the process of driving the grinding disc 18 to rotate, and further ensure the grinding effect of the grinding disc 18 .

Because in the actual use process, it is usually necessary to grind the side wall and the ceiling. The side wall grinding can be achieved in the products on the market, and there is no need to install any additional components, but the ceiling needs to be topped instead. In order to solve the above technical problems, the grinding machine also includes a driving mechanism 20 for driving the grinding disc 18 to rotate. The driving mechanism 20 in this embodiment is a series motor, and the series motor is placed vertically Above the rotation fulcrum 9, as shown at A in FIG. 4, that is, at the installation position of the drive mechanism 20, the vertical arrangement makes the center of gravity of the series motor in the middle position, and the position of the series motor is in the grinding disc 18. Therefore, when the grinding machine grinds the top, the grinding surface will naturally face upward, and there is also a certain preset angle when grinding the side wall. It is simple and convenient to use, and can effectively enhance the user's experience. Compared with the horizontal motor with the lower center of gravity of the grinding disc, the grinding machine can be flexibly switched between grinding the wall and the top of the wall, saving time and effort, and tool-free switching, which improves the grinding efficiency and enhances the user's experience. The grinding experience is conducive to the promotion and application of the above grinding machines in the market.

The grinding machine in this embodiment is also provided with a secondary handle 17, which is detachably connected to the above-mentioned main handle 16, and the length of the secondary handle 17 can be freely changed according to the needs of the user, so that the grinding machine can be utilized more widely. It can further enhance the user experience.

When the traditional grinding machine is grinding, the force exerted on the grinding disc is often not uniform, and the grinding disc will have problems such as beating, laborious, and insufficient flexibility during the moving process. The central axes of the main handle 16 and the auxiliary handle 17 are arranged on the same straight line, which can effectively solve the above technical problems, and can also greatly improve the grinding efficiency, save time and effort, reduce the operation difficulty of the grinding machine, and enhance the user experience.

The rotating base 10 is also provided with a movable rod 7, and the above-mentioned movable rod 7 is detachably mounted on the above-mentioned rotating base 10. By setting the movable rod 7, the bracket 15 is detachably installed at the rotating base 10, which saves time and effort and reduces the The installation difficulty further ensures the use effect of the grinding machine.

The grinding disc 18 is provided with a removable grinding disc cover 14 on the side and a grinding disc cover 13 on the upper side, and the grinding disc cover 13 is provided with a dust outlet 21, and the dust outlet 21 is provided with a dust suction hose 22, and the removable grinding disc cover 14 The setting of the grinding disc cover 13 further ensures the use effect of the grinding disc 18 and reduces the probability of the grinding disc 18 jumping during the grinding process. The dust outlet 21 and the dust suction hose 22 can be set to concentrate the dust generated at the grinding disc 18. Handling the dumping further ensures the cleanliness of the use environment of the grinding disc 18 and enhances the user experience.

A head casing 11 is arranged between the rotating seat 10 and the above-mentioned grinding disc 18, and a large gear 12 is installed in the above-mentioned head casing 11. The teeth of the output shaft of the driving mechanism drive the large gear, and the number of teeth of the motor shaft of the driving mechanism is further set as 3 teeth, compared with the traditional gear, the gear ratio of the large gear 12 becomes larger, and the transmission efficiency is higher, and the setting of the large gear 12 further ensures the stability of the grinding disc 18 during the grinding and rotation process, and ensures the use of the grinding machine. Effect. A large end cover 19 is also provided between the rotating seat 10 and the above-mentioned grinding disc 18. The above-mentioned large end cover 19 and the above-mentioned head shell 11 form a cavity, and the above-mentioned large gear 12 is installed in the above-mentioned cavity, so as to reduce the impact of external substances on the large gear 12. Influence, ensure the service life of the large gear and reduce the user's cost of use.

The single-phase series motor is usually used in the grinding machine. The single-phase series motor is commonly known as the series motor, which is named after the excitation winding and the excitation winding work in series. Single-phase series excitation motors are AC and DC dual-purpose motors, which can work with either AC power or DC power.

The single-phase series motor has high speed, small size, light weight and convenient speed regulation, so it is used as a power source in most power tools, but the single-phase series motor used in power tools has frequent starting, high speed, large vibration and low load. It is because of these characteristics that the temperature rise of the armature rises sharply because of the uniform and easy to block the rotor, which puts forward high requirements on the manufacturing quality of the single-phase series motor.

The motor is mainly composed of three parts: stator, rotor and bracket. The stator is composed of salient pole iron core and excitation winding. The rotor is composed of hidden pole iron core, armature winding, commutator, rotating shaft and cooling fan blades. The excitation winding and armature are composed of three parts. A series circuit is formed between the windings through the brushes and the commutator. However, in the existing rotor, the commutator is installed at one end of the hidden pole iron core, and the cooling fan blades are arranged away from the commutator. The high working temperature of the motor will undoubtedly affect the working efficiency and service life of the motor, which is not conducive to the promotion and application of the above-mentioned motor in the grinding machine.

In order to solve the above technical problems, the series motor in this embodiment includes a stator 1 , a rotor 2 , a cooling fan 3 and a rotor commutator 6 . The rotor commutator 6 is installed close to the cooling fan 3 and is connected to the cooling fan 3 . The blades 3 are installed on the same side of the above-mentioned series excitation motor, the rotor commutator 6 and the cooling fan 3 are installed on the same side of the series motor, and the cooling fan 3 is installed at the other end of the rotor deceleration transmission, which can effectively ensure The operation stability of the series motor can improve the performance and service life of the series motor, and further ensure the use effect of the grinding machine. The above-mentioned series excitation motor also includes a casing 4, and the above-mentioned stator 1, the rotor 2, the cooling fan 3 and the rotor commutator 6 are all installed in the above-mentioned casing 4, and the setting of the casing 4 further ensures that the stator is arranged in it. 1. The service life of the rotor 2, the cooling fan 3 and the rotor commutator 6 can reduce the influence of external substances on the stator 1, the rotor 2, the cooling fan 3 and the rotor commutator 6.

The outer cover of the series excitation motor that is far from the above-mentioned grinding disc 18 is provided with a rear cover 5, and the above-mentioned series excitation motor is installed in the above-mentioned rear cover 5, and the setting of the rear cover 5 plays the role of protecting the series excitation motor and further ensures the use of the series excitation motor. The service life of the grinding machine is reduced, and the use cost of the user is reduced. At the same time, the setting of the rear cover 5 makes the overall appearance of the grinding machine higher, which is beneficial to the promotion and application of the grinding machine in the market.

As shown in Figure 5, it is a schematic diagram of the use state of the new type of sander in this embodiment for grinding the top of the wall. As shown in Figure 6, it is a schematic diagram of the use state of the new type of sander in this embodiment for grinding the side of the wall. The grinding disc 18. It can be freely switched between the side of the grinding wall and the top of the wall, which effectively reduces the operation difficulty of the grinding machine and enhances the user's use effect.

The new type of grinding machine in this embodiment, by placing the series motor on the top of the grinding plate 18, and the vertical position is above the bracket 15, that is, the center of gravity of the series motor is on the upper side of the grinding plate 18, which is different from the traditional grinding machine. Compared with the horizontal motor with the lower center of gravity of the grinding disc, the grinding machine can be flexibly switched between grinding the wall and the top of the wall, saving time and effort, and tool-free switching, which improves the grinding efficiency and enhances the user's experience. The grinding experience is conducive to the promotion and application of the above grinding machines in the market.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; thus , the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the reference numerals in the figures are used more in this article: 1, stator; 2, rotor; 3, cooling fan; 4, casing; 5, rear cover; 6, rotor commutator; 7, movable rod; 8 , locking part; 9, pivot point; 10, rotating seat; 11, head shell; 12, large gear; 13, grinding disc cover; 14, detachable grinding disc cover; 15, bracket; 16, main handle; 17, auxiliary handle ; 18, grinding disc; 19, big end cap; 20, drive mechanism; 21, dust outlet; 22, vacuum hose and other terms, but the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the nature of the present invention; it is contrary to the spirit of the present invention to interpret them as any kind of additional limitation.

Claims

The novel sanding machine is characterized in that it comprises a sanding disc (18), a bracket (15) and a main handle (16), the sanding disc (18) is provided with a rotating seat (10), and the bracket (15) is locked by a lock The tightening member (8) can be movably connected to the rotating seat (10) and form a rotating fulcrum (9) of the grinding disc (18) and the bracket (15), and the main handle (16) can be movably connected to the The other end of the bracket (15); further comprising a driving mechanism (20), the driving mechanism (20) is standing above the rotation fulcrum (9) and the center of gravity of the driving mechanism (20) is located at the rotation fulcrum (9) on the upper side.
The novel grinding machine according to claim 1, characterized in that: the rotating fulcrum (9) is located on the central axis of the grinding disc (18).
The novel grinding machine according to claim 2, characterized in that: the central axis of the driving mechanism (20) and the central axis of the grinding disc (18) are arranged parallel to each other, and the driving mechanism (20) The distance between the central axis of the grinding disc (18) and the central axis of the grinding disc (18) is less than 2/3 of the diameter of the grinding disc (18).
The novel sander according to claim 1 or 3, characterized in that: it further comprises a secondary handle (17), and the secondary handle (17) is detachably connected to the main handle (16).
The novel grinding machine according to claim 4, characterized in that: the central axes of the rotating fulcrum (9), the bracket (15), the main handle (16) and the auxiliary handle (17) are all located at on the same straight line.
The novel grinding machine according to claim 1, characterized in that: the grinding disc (18) is provided with a removable grinding disc cover (14) on the side and a grinding disc cover (13) above, and the grinding disc cover (13) ) is provided with a dust outlet (21), and a dust suction hose (22) is arranged at the dust outlet (21).
The novel grinding machine according to claim 6, characterized in that a head case (11) is arranged between the rotating seat (10) and the grinding disc (18), and a head case (11) is installed in the head case (11). A large gear (12), the teeth of the output shaft of the driving mechanism (20) drive the large gear (12).
The novel grinding machine according to claim 7, wherein the number of teeth of the motor shaft of the driving mechanism (20) is 3 teeth.
The novel grinding machine according to claim 7, characterized in that: a large end cover (19) is further provided between the rotating seat (10) and the grinding disc (18), and the large end cover (19) A cavity is formed with the head shell (11), and the large gear (12) is installed in the cavity.
The novel grinding machine according to claim 1, characterized in that: the driving mechanism (20) comprises a stator (1), a rotor (2), and a cooling fan (3), and the cooling fan (3) is installed on the The other end of the rotor deceleration transmission; the drive mechanism (20) further comprises a casing (4), and the stator (1), the rotor (2), and the cooling fan blades (3) are all mounted on the casing (4) Inside.