CN114888680A

CN114888680A - Quick-change bottom plate of sander and multifunctional sander

Info

Publication number: CN114888680A
Application number: CN202210497172.9A
Authority: CN
Inventors: 鞠晓峰
Original assignee: Changzhou Saidi Tools Co ltd
Current assignee: Changzhou Saidi Tools Co ltd
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-08-12
Anticipated expiration: 2042-05-09
Also published as: DE202023100070U1; FR3135218B3; CN114888680B; FR3135218A3

Abstract

The invention discloses a quick-change bottom plate of a sander and a multifunctional sander, and belongs to the field of electric polishing tools. The quick-change bottom plate of the sander comprises a bottom plate main body, an upper bottom plate cover body, an eccentric shaft, an operating part and a lock tongue, wherein the lock tongue is provided with an output shaft locking position and an output shaft unlocking position; when the operating part is located at the second operating position, the lock tongue is located at the unlocking position of the output shaft, and the lock tongue is separated from the clamping hook of the output shaft through the lock catch of the lock tongue to unlock. The base plate is quickly assembled and disassembled by matching the operating element with the lock tongue, the lock tongue is used as an intermediate part to lock the base plate on the output shaft of the sander, the base plate is stably connected, the connection strength is high, accidental loosening caused by mistaken touch or deformation of the operating element is not easy to occur, the structural design is simple and ingenious, and the assembling and disassembling operation is simple and convenient.

Description

Quick-change bottom plate of sander and multifunctional sander

Technical Field

The invention relates to a polishing and grinding tool, in particular to a quick-change bottom plate of a sander and a multifunctional sander.

Background

A sander is a power tool frequently used in sanding and polishing operations. The handheld sander is popular among users due to the advantages of convenience in use, flexibility in operation and the like, and can be used for sanding work on surfaces such as wooden products, metal products, plastic products, walls and the like. A common handheld sander mainly comprises a sander body and a bottom plate, wherein the bottom plate is installed on the sander body, and a motor in the sander body drives the bottom plate to do reciprocating swing motion through an eccentric mechanism, so that sanding and polishing operations are performed on workpieces.

For different working environments, polishing accessories in different shapes, namely a bottom plate of the polishing machine, are usually selected on the polishing machine so as to meet different polishing working conditions. The common sander base plate comprises a triangular base plate, a rectangular base plate, a circular base plate and the like, wherein the circular base plate is directly connected with an eccentric shaft of a sander and revolves around an output shaft of the sander and simultaneously rotates around the eccentric shaft to form random orbital motion; the triangular bottom plate and the rectangular bottom plate are connected with an eccentric shaft of the machine body and are connected with the machine body through the swing support frame, so that the triangular bottom plate and the rectangular bottom plate only perform revolution swing to form revolution orbital motion. Different sander baseplates have different purposes and different use environments, so that the all-in-one sander capable of flexibly replacing different baseplates is certainly popular with consumers.

In the multi-in-one multifunctional sander, the base plate needs to be frequently disassembled and replaced, so that the quick-replacing structure of the base plate is indispensable for the multifunctional sander. Common quick change structure of sander base plate mostly adopts screw fastener to link together the eccentric shaft of bottom plate and grinder, need use assembly and disassembly tools such as spanner during the dismouting, and the dismouting operation is comparatively hard and loaded down with trivial details. To this kind of problem, chinese patent number ZL201821738178.6 discloses "a grinder bottom plate is easy to be traded mechanism and uses its grinder", its grinder bottom plate is easy to be traded mechanism including installing the locking lever on the grinder bottom plate and locating the pothook of connecting seat lower part, the work part of locking lever rotates and installs on the upper portion connecting end of grinder bottom plate, and the work part of locking lever be equipped with through rotating the locking lever and with the pothook lock on the connecting seat or the buckling parts that break away from, the one end of locking lever still is equipped with and is used for driving work part pivoted operating handle, utilize locking lever and pothook cooperation to realize the bottom plate and quick connection and the tear open of grinder organism and trade. The mode is simple to operate, the bottom plate is convenient to disassemble and assemble, but the axial locking force depends on the buckling strength of the locking rod and the clamping hook, and the operating handle of the locking rod is easy to accidentally loosen due to mistaken touch or deformation of the locking rod.

Disclosure of Invention

1. Technical problem to be solved by the invention

The invention aims to overcome the defects of poor connecting strength, easy accidental loosening caused by mistaken touch and the like of the quick-assembly structure of the base plate of the existing sander, and provides a quick-change base plate of the sander and a multifunctional sander.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the quick-change bottom plate of the sander comprises a bottom plate main body, a bottom plate upper cover body, an eccentric shaft, an operating part and a lock tongue, wherein the bottom plate upper cover body is fixed on the upper part of the bottom plate main body;

when the operating part is positioned at the first operating position, the lock tongue is positioned at the locking position of the output shaft and is locked by buckling the lock catch of the lock tongue and the clamping hook of the output shaft;

when the operating part is located at the second operating position, the lock tongue is located at the unlocking position of the output shaft, and the lock tongue is separated from the clamping hook of the output shaft through the lock catch of the lock tongue to unlock.

Furthermore, the lock tongue is hinged on the eccentric shaft, an elastic element is arranged between the lock tongue and the eccentric shaft, when the operating element is positioned at the first operating position, the operating element is separated from the lock tongue, and the lock tongue is maintained at the locking position of the output shaft through the elastic element; when the operating piece is switched from the first operating position to the second operating position, the operating piece overcomes the elastic force of the elastic piece to drive the lock tongue to rotate to the unlocking position of the output shaft.

Furthermore, a balance block is arranged at the lower part of the eccentric shaft, a support arm is arranged on the lock tongue, the support arm is rotatably arranged on the balance block through a rotating shaft, and the elastic part is a torsion spring.

Furthermore, the lock catch is a D-shaped lock hole, and the cross section of the shaft hole is also D-shaped.

Furthermore, the eccentric shaft is rotatably mounted on the upper cover body of the bottom plate through a bottom plate bearing, the main body of the bottom plate is provided with a positioning table, and the upper cover body of the bottom plate is positioned on the main body of the bottom plate through the positioning table and fixedly connected through screws.

Furthermore, the bottom plate main body is a random orbital motion bottom plate or a revolution orbital motion bottom plate, and when the bottom plate main body is the revolution orbital motion bottom plate, the bottom plate main body is provided with a connecting column matched with a supporting frame on the sander.

Furthermore, the operating part for rotate the locking lever of installing on grinder quick change bottom plate, the locking lever be located the inboard part of the lid on the bottom plate and have push away the top, the locking lever be located the bottom plate one end in the lid outside have the rotation handle, the rotation handle drive push away the top and rotate and control the spring bolt and switch between output shaft latched position and output shaft unblock position, bottom plate main part or bottom plate on still locate on the lid and be used for keeping the operation at the spacing arch of first operating position.

The invention relates to a multifunctional sander, which comprises a sander body assembly, a quick-change base plate and a base plate, wherein the sander body assembly comprises a shell and an output shaft which is arranged in the shell and is controlled to rotate, the quick-change base plate of the sander is further provided, the output shaft is provided with a cross section shape which is inserted into a shaft hole of an eccentric shaft and transmits torque, and the lower end of the output shaft is provided with a clamping hook;

when the device is installed, the operating part controls the lock tongue to be located at the unlocking position of the output shaft, the output shaft is inserted into the shaft hole of the eccentric shaft, the clamping hook extends out of the shaft hole, the operating part is switched from the second operating position to the first operating position, the lock tongue is controlled to be switched to the locking position of the output shaft, and the lock tongue is locked by buckling the lock catch on the lock tongue with the clamping hook of the output shaft;

when the lock is disassembled, the operating part is switched from the first operating position to the second operating position, the lock tongue is controlled to be switched to the unlocking position of the output shaft, and the lock tongue is separated from the clamping hook of the output shaft by utilizing the lock catch of the lock tongue to unlock.

Furthermore, the lower part of the shell is also provided with a support frame, and when the bottom plate main body is a bottom plate which moves along a random orbit, the sander quick-change bottom plate revolves around the output shaft and simultaneously rotates around the eccentric shaft; when the bottom plate main body is a revolution orbit movement bottom plate, the bottom plate main body is connected with the support frame, and the sander quick-change bottom plate revolves around the output shaft under the limiting effect of the support frame.

Furthermore, a driving motor is arranged in the shell, a motor shaft of the driving motor is connected with the output shaft through a connecting shaft, the connecting shaft is supported in the shell through a bearing, and a fan is further arranged on the connecting shaft.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:

(1) the sander quick-change base plate comprises a base plate main body, a base plate upper cover body, an eccentric shaft, an operating part and a lock tongue, wherein the lock tongue is provided with an output shaft locking position and an output shaft unlocking position; when the operating part is located at the second operating position, the lock tongue is located at the unlocking position of the output shaft, and the lock tongue is separated from the clamping hook of the output shaft through the lock catch of the lock tongue to unlock; the locking or unlocking of the bottom plate and the output shaft of the sander is realized by matching the operating element and the lock tongue, the lock tongue is used as an intermediate part to lock the bottom plate on the output shaft of the sander, the connection of the bottom plate is more stable, the connection strength is high, accidental loosening caused by mistaken touch or deformation of the operating element is not easy to occur, the structural design is simple and ingenious, and the bottom plate is simple and convenient to disassemble and assemble;

(2) according to the sander quick-change base plate and the multifunctional sander, the lock tongue is hinged to the eccentric shaft, the elastic piece is further arranged between the lock tongue and the eccentric shaft, when the operating piece is located at the first operating position, the operating piece is separated from the lock tongue, and the lock tongue is maintained at the output shaft locking position through the elastic piece; when the operating piece is switched from the first operating position to the second operating position, the operating piece overcomes the elastic force of the elastic piece to drive the lock tongue to rotate to the unlocking position of the output shaft; by adopting the design, when the bottom plate is installed, the operating part is not in contact with the lock tongue any more, the elastic part is utilized to keep the lock position of the lock tongue, the operating part does not directly participate in the locking of the bottom plate, and the problem of accidental loosening caused by mistaken contact or deformation of the operating part is effectively solved; when the bottom plate is disassembled, the operating piece overcomes the elastic force of the elastic piece to drive the lock tongue to be switched to the unlocking position, so that the bottom plate is unlocked and disassembled, and the operation is simple and convenient;

(3) according to the quick-change bottom plate of the sander and the multifunctional sander, the balance block is arranged at the lower part of the eccentric shaft, the support arm is arranged on the lock tongue, the support arm is rotatably arranged on the balance block through the rotating shaft, the elastic part is the torsion spring, and the lock tongue and the elastic part are used as part of the balance block, so that the eccentric vibration of the sander can be reduced, the lock tongue and the torsion spring are simple and compact in structure and convenient to assemble and manufacture, and the bottom plate is stable in disassembly and replacement operation;

(4) according to the quick-change bottom plate of the sander and the multifunctional sander, the lock catch is the D-shaped lock hole, the cross section of the shaft hole is also in the D shape, the D-shaped lock hole can be more convenient for the insertion of the output shaft, and the D-shaped lock hole is fastened with the clamping hook of the output shaft; the D-shaped shaft hole can realize torque transmission between the output shaft and the eccentric shaft, and the transmission is more stable and reliable;

(5) according to the quick-change bottom plate and the multifunctional sander of the sander, the eccentric shaft is rotatably mounted on the upper cover body of the bottom plate through the bottom plate bearing, the positioning table is arranged on the main body of the bottom plate, the upper cover body of the bottom plate is positioned on the main body of the bottom plate through the positioning table and is fixedly connected through the screws, and the main body of the bottom plate and the upper cover body of the bottom plate adopt an assembly type structural design, so that the sander is simple in structure, convenient to manufacture and convenient to assemble and manufacture the bottom plate of the sander;

(6) the quick-change bottom plate of the sander and the multifunctional sander are characterized in that a bottom plate main body is a random orbital motion bottom plate or a revolution orbital motion bottom plate, when the bottom plate main body is the revolution orbital motion bottom plate, a connecting column matched with a supporting frame on the sander is arranged on the bottom plate main body, the sander quick-change bottom plate can be used for bottom plates in different forms, and can be combined to form the multifunctional sander together with a sander body;

(7) according to the sander quick-change base plate and the multifunctional sander, the operating part is the lock rod which is rotatably installed on the sander quick-change base plate, the part of the lock rod, which is positioned on the inner side of the upper cover body of the base plate, is provided with the ejector part, one end of the lock rod, which is positioned on the outer side of the upper cover body of the base plate, is provided with the rotating handle, the rotating handle drives the ejector part to rotate so as to control the lock tongue to switch between the locking position and the unlocking position of the output shaft, and the main body of the base plate or the upper cover body of the base plate are also provided with the limiting bulges for keeping the operation at the first operation position;

(8) the invention relates to a multifunctional sander, which comprises a sander body assembly, wherein the sander body assembly comprises a shell and an output shaft which is arranged in the shell and controlled to rotate, and further comprises the sander quick-change bottom plate, the output shaft is provided with a cross-sectional shape which is inserted into a shaft hole of an eccentric shaft and transmits torque, the lower end of the output shaft is provided with a clamping hook, when the sander is installed, an operating part controls a lock tongue to be positioned at an unlocking position of the output shaft, the output shaft is inserted into the shaft hole of the eccentric shaft, the clamping hook extends out of the shaft hole, the operating part is switched from a second operating position to a first operating position, the lock tongue is controlled to be switched to a locking position of the output shaft, and the lock tongue is buckled with the clamping hook of the output shaft to be locked; when the lock is disassembled, the operating part is switched from the first operating position to the second operating position, the lock tongue is controlled to be switched to the unlocking position of the output shaft, and the lock tongue is separated from the clamping hook of the output shaft by utilizing the lock catch of the lock tongue to unlock; the replacement operation of the bottom plate of the multifunctional sander is greatly facilitated, and the bottom plate is more firmly and stably connected on the sander body;

(9) according to the multifunctional sander, the lower part of the shell is also provided with the support frame, and when the bottom plate main body is a bottom plate which randomly orbits, the sander quick-change bottom plate revolves around the output shaft and also rotates around the eccentric shaft; when the bottom plate main part is revolution orbital motion bottom plate, the bottom plate main part is connected with the support frame, and grinder quick change bottom plate revolves around the output shaft under the support frame restriction effect, utilizes the support frame to realize being connected of organism and different form bottom plate, and the organism can cooperate random orbital motion bottom plate and revolution orbital motion bottom plate to use, makes the grinder homoenergetic use under different usage and operational environment, has satisfied the polishing demand of polishing that the consumer is different, makes the grinder have more practicality and functional.

Drawings

FIG. 1 is a schematic view of a multi-functional sander of the present invention in combination with different types of baseplates;

fig. 2 is a schematic perspective view of a quick-change base plate of a sanding machine according to the present invention;

fig. 3 is a schematic diagram of a disassembled structure of a quick-change soleplate of a sanding machine according to the invention;

fig. 4 is a schematic sectional view of a quick-change base plate of a sander according to the present invention (output shaft locked state);

fig. 5 is a schematic sectional view of a quick-change base plate of a sander according to the present invention (an output shaft is unlocked);

fig. 6 is a schematic perspective view of a multifunctional sander according to the present invention;

fig. 7 is a schematic view of the multifunctional sander with the sander body and the base plate detached;

fig. 8 is a schematic sectional view of the multifunction sander according to the present invention (output shaft locked state);

fig. 9 is a schematic sectional view of the multifunctional sander according to the present invention (output shaft unlocked state).

The reference numerals in the schematic drawings illustrate:

1. a machine body assembly; 1-1, a shell; 1-2, an output shaft; 1-2-1, hook; 1-3, a support frame; 1-4, driving a motor; 1-4-1, motor shaft; 1-5, a fan; 1-6, a switch; 1-7, a dust collecting box; 1-8, a battery; 1-9, connecting shaft;

2. a floor assembly; 2A, a rectangular bottom plate; 2B, a triangular bottom plate; 2C, a circular bottom plate; 2-1, a bottom plate main body; 2-1-1, a positioning table; 2-2, a cover body on the bottom plate; 2-2-1, limiting bulges; 2-3, an eccentric shaft; 2-3-1, shaft hole; 2-3-2, a balance weight; 2-3-3, a first rotating shaft hole; 2-4, operating parts; 2-4-1, pushing the top; 2-4-2, a rotating handle; 2-5, connecting columns; 2-6, a baseplate bearing; 2-7, a bolt; 2-7-1, locking; 2-7-2, a support arm; 2-7-3, a second rotating shaft hole; 2-8, a rotating shaft; 2-9 and an elastic part.

Detailed Description

For a further understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples.

[ example 1]

Referring to fig. 1 to 5, the quick-change base plate for a sander of the present embodiment includes a base plate main body 2-1, a base plate upper cover 2-2, an eccentric shaft 2-3, an operating element 2-4 and a lock tongue 2-7, the base plate upper cover 2-2 preferably adopts a circular cover structure, the base plate upper cover 2-2 is fixed on the upper portion of the base plate main body 2-1, a mounting cavity is formed between the base plate upper cover 2-2 and the base plate main body 2-1, the eccentric shaft 2-3 is axially and rotatably mounted in the base plate upper cover 2-2, the eccentric shaft 2-3 is eccentrically provided with a shaft hole 2-3-1 for driving and matching with an output shaft 1-2 of the sander, a certain eccentric distance is provided between the axis of the shaft hole 2-3-1 and the axis of the eccentric shaft 2-3, the eccentricity can be selected as required, so that the base plate of the sanding machine with different eccentricities can be obtained; the lock tongue 2-7 is arranged on the eccentric shaft 2-3, the lock tongue 2-7 is provided with a lock catch 2-7-1 matched with the hook 1-2-1 on the output shaft 1-2, the lock tongue 2-7 is provided with an output shaft locking position and an output shaft unlocking position, the lock tongue 2-7 can be connected with the output shaft 1-2 of the sander in a locking mode in the output shaft locking position, and the output shaft 1-2 can be released in the output shaft unlocking position. The operating part 2-4 is provided with a first operating position and a second operating position which are matched with the lock tongues 2-7, the first operating position of the operating part 2-4 corresponds to an output shaft locking position, the second operating position corresponds to an output shaft unlocking position, and when the operating part 2-4 is located at the first operating position, the lock tongues 2-7 are located at the output shaft locking position and are locked by buckling the lock catches 2-7-1 of the lock tongues 2-7 with the hook catches 1-2-1 of the output shaft 1-2; when the operating part 2-4 is located at the second operating position, the bolt 2-7 is located at the output shaft unlocking position, and the bolt 2-7-1 of the bolt 2-7 is separated from the hook 1-2-1 of the output shaft 1-2 to unlock. The operating parts 2-4 are matched with the lock tongues 2-7 to lock or unlock the bottom plate and the output shaft 1-2 of the sander, the lock tongues 2-7 serve as intermediate parts to lock the bottom plate on the output shaft 1-2 of the sander, the bottom plate is more stably connected, the connection strength is high, accidental loosening and loosening caused by mistaken touch or deformation of the operating parts 2-4 are not prone to occurring, the structural design is simple and ingenious, and the bottom plate is easy and convenient to disassemble and assemble.

As shown in fig. 4 and 5, in the present embodiment, the bolt 2-7 is hinged to the eccentric shaft 2-3, an elastic member 2-9 is further provided between the bolt 2-7 and the eccentric shaft 2-3, when the operating member 2-4 is located at the first operating position (as shown in fig. 4), the operating member 2-4 is disengaged from the bolt 2-7, and the bolt 2-7 is maintained at the output shaft locking position by the elastic member 2-9; when the operating piece 2-4 is switched from the first operating position to the second operating position (as shown in fig. 5), the operating piece 2-4 overcomes the elastic force of the elastic piece 2-9 to drive the bolt 2-7 to rotate to the output shaft unlocking position. By adopting the design, when the bottom plate is installed, the operating part 2-4 is not contacted with the lock tongue 2-7 any more, the locking position of the lock tongue 2-7 is kept by using the elastic part 2-9, and the operating part 2-4 does not directly participate in the locking of the bottom plate, so that the problem of accidental loosening caused by mistaken contact or deformation of the operating part 2-4 is effectively solved; when the bottom plate is disassembled, the operating piece 2-4 is utilized to overcome the elasticity of the elastic piece 2-9 to drive the lock tongue 2-7 to be switched to the unlocking position, so that the bottom plate is unlocked and disassembled, and the operation is simple and convenient. Of course, the operating part 2-4 can overcome the elasticity of the elastic part 2-9 to drive the lock tongue 2-7 to be in the output shaft locking position, in this case, when the operating part 2-4 is separated from the lock tongue 2-7, the lock tongue 2-7 is maintained at the output shaft unlocking position through the elastic part 2-9, in this way, the operating part 2-4 is utilized to exert locking force on the lock tongue 2-7, the lock tongue 2-7 is utilized to lock the output shaft 1-2, the bottom plate axial force does not directly act on the operating part 2-4, the connecting strength of the bottom plate can be improved, and the bottom plate is not easy to fall off. Furthermore, a balance block 2-3-2 is arranged at the lower part of the eccentric shaft 2-3, a bolt 2-7 is provided with a support arm 2-7-2, the support arm 2-7-2 is rotatably arranged on the balance block 2-3-2 through a rotating shaft 2-8, and an elastic part 2-9 is a torsion spring. Specifically, as shown in fig. 3, a first rotating shaft hole 2-3-3 is formed in the balance block 2-3-2, a second rotating shaft hole 2-7-3 is formed in the support arm 2-7-2 on the two sides of the bolt 2-7, the torsion spring is sleeved on the rotating shaft 2-8, the rotating shaft 2-8 sequentially penetrates through the first rotating shaft hole 2-3-3 and the second rotating shaft hole 2-7-3, so that the bolt 2-7 is rotatably connected to the balance block 2-3-2, one elastic arm of the torsion spring abuts against the bolt 2-7, and the other elastic arm abuts against the balance block 2-3-2. The lock tongue 2-7 and the elastic part 2-9 are used as a part of the balance block 2-3-2, so that the eccentric vibration of the sander can be reduced, and the lock tongue 2-7 and the torsion spring have simple and compact structures, are convenient to assemble and manufacture, and are stable in bottom plate replacement operation. The lock tongue 2-7 in the embodiment preferably adopts a metal sheet metal part, the lock catch 2-7-1 is a D-shaped lock hole, the D-shaped lock hole can be more convenient for the insertion of the output shaft, and the D-shaped lock hole is fastened with the clamping hook 1-2-1 of the output shaft 1-2, so that the structure is simple and the connection is stable; the cross section of the shaft hole 2-3-1 is also in a D shape, the D-shaped shaft hole 2-3-1 can realize torque transmission between the output shaft 1-2 and the eccentric shaft 2-3, and the transmission is more stable and reliable.

As shown in FIGS. 2 and 3, in the present embodiment, the eccentric shaft 2-3 is rotatably mounted on the upper cover 2-2 of the base plate by a base plate bearing 2-6, the outer ring of the base plate bearing 2-6 is interference-mounted in the bearing mounting cavity of the upper cover 2-2 of the base plate, and the eccentric shaft 2-3 is interference-mounted in the inner ring of the base plate bearing 2-6, so that the eccentric shaft 2-3 can be mounted on the upper cover 2-2 of the base plate. The bottom plate main body 2-1 is provided with a positioning table 2-1-1, the positioning table 2-1-1 is matched with the inner side wall of the bottom plate upper cover body 2-2 in a positioning way, and the bottom plate upper cover body 2-2 is positioned on the bottom plate main body 2-1 through the positioning table 2-1-1 and is fixedly connected through a screw. The upper cover body 2-2 and the main body 2-1 of the bottom plate are of split structures and are assembled and fixed together by screws, so that the structure is simple, the manufacture is convenient, and the assembly and the manufacture of the bottom plate of the sanding machine are convenient.

Returning to fig. 1, in the quick-change soleplate of a sander of the present embodiment, the soleplate body 2-1 is a random orbital soleplate or a revolution orbital soleplate, and when the soleplate body 2-1 is a revolution orbital soleplate, the soleplate body 2-1 is provided with a connecting column 2-5 for matching with a support frame 1-3 on the sander. The random orbital motion base plate revolves around an output shaft 1-2 of the sander and simultaneously rotates around an eccentric shaft 2-3, such as a circular base plate 2C in the figure 1; after the revolution orbit motion bottom plate is installed, a connecting post 2-5 on the revolution orbit motion bottom plate is connected with a supporting frame 1-3 on the sander, and revolves and swings around an output shaft 1-2 under the limiting action of the supporting frame 1-3, such as a rectangular bottom plate 2A and a triangular bottom plate 2B in the figure 1. The quick-change bottom plate of the sander can be used for bottom plates in different forms, and can be combined to form a multifunctional sander by matching with a sander body.

As shown in fig. 2 to 5, in this embodiment, the operating element 2-4 is preferably a lock lever rotatably mounted on the quick-change base plate of the sander, a portion of the lock lever located inside the upper cover 2-2 of the base plate has a push top portion 2-4-1, one end of the lock lever located outside the upper cover 2-2 of the base plate has a rotating handle 2-4-2, the rotating handle 2-4-2 drives the push top portion 2-4-1 to rotate to control the locking tongue 2-7 to switch between the locking position and the unlocking position of the output shaft, and a limiting protrusion 2-2-1 for keeping the operating element 2-4 at the first operating position is further disposed on the main body 2-1 of the base plate or the upper cover 2-2 of the base plate to prevent the operating element 2-4 from being released due to accidental contact. Specifically, the rotating parts at two ends of the operating part 2-4 are arranged between the bottom plate main body 2-1 and the bottom plate upper cover body 2-2, the push top part 2-4-1 is positioned below the bolt 2-7, when the operating part 2-4 is positioned at a first operating position, the push top part 2-4-1 does not apply upward thrust to the bolt 2-7, when the operating part 2-4 rotates to a second operating position, the push top part 2-4-1 is used for pushing the bolt 2-7 to be lifted upwards, and then the bolt 2-7 and the output shaft are unlocked 1-2. The operating parts 2-4 adopt the lock rod design, and have simple structure, convenient manufacture and flexible operation. Of course, instead of a locking lever, the operating elements 2-4 can also be designed as knobs or push buttons or the like which perform the same function and function.

As shown in fig. 6 to 9, the present embodiment further discloses a multifunctional sander, the sander comprises a machine body assembly 1 and a base plate assembly 2 mounted on the machine body assembly 1, the machine body assembly 1 comprises a housing 1-1 and an output shaft 1-2 arranged in the housing 1-1 for controlled rotation, the output shaft 1-2 has a cross-sectional shape which is inserted into a shaft hole 2-3-1 of an eccentric shaft 2-3 and transmits torque, and the lower end of the output shaft 1-2 is provided with a hook 1-2-1. When the base plate assembly 2 is installed, the operating part 2-4 controls the lock tongue 2-7 to be located at the output shaft unlocking position, the output shaft 1-2 is inserted into the shaft hole 2-3-1 of the eccentric shaft 2-3, the hook 1-2-1 extends out of the shaft hole 2-3-1, the operating part 2-4 is switched from the second operating position to the first operating position, the lock tongue 2-7 is controlled to be switched to the output shaft locking position, and the lock tongue 2-7-1 on the lock tongue 2-7 is buckled with the hook 1-2-1 of the output shaft 1-2 to be locked (as shown in fig. 8); when the device is disassembled, the operating piece 2-4 is switched from the first operating position to the second operating position, the lock tongue 2-7 is controlled to be switched to the output shaft unlocking position, and the lock tongue 2-7-1 of the lock tongue 2-7 is separated from the hook 1-2-1 of the output shaft 1-2 to unlock (as shown in fig. 9). The multifunctional sander of the embodiment greatly facilitates the replacement operation of the bottom plate of the multifunctional sander, and the bottom plate is connected on the sander body more firmly and stably.

As shown in fig. 1, in the multifunctional sander of the present embodiment, the lower part of the housing 1-1 is further provided with a support frame 1-3, when the base plate main body 2-1 is a base plate with random orbital motion, the sander quick-change base plate revolves around the output shaft 1-2 and also rotates around the eccentric shaft 2-3; when the bottom plate main body 2-1 is a revolution orbit bottom plate, the bottom plate main body 2-1 is connected with the support frame 1-3, and the sander quick-change bottom plate revolves around the output shaft 1-2 under the restriction of the support frame 1-6. The random orbital motion bottom plate is as a circular bottom plate 2C in figure 1, and is arranged on an output shaft 1-2 of a machine body assembly 1 through an operating part 2-4 and a lock tongue 2-7, the circular bottom plate 2C is not contacted with a support frame 1-3, when the random orbital motion bottom plate works, the output shaft 1-2 drives an eccentric shaft 2-3 on the circular bottom plate 2C to rotate, so that the circular bottom plate 2C revolves around the axis of the output shaft 1-2, meanwhile, the circular bottom plate 2C can freely rotate around the axis of the eccentric shaft 2-3 to form random orbital motion, and the rotating speed of the circular bottom plate 2C is higher at the moment and is more suitable for rough grinding. The revolution orbit movement bottom plate is as a rectangular bottom plate 2A and a triangular bottom plate 2B in figure 1, connecting columns 2-5 matched with support frames 1-3 are arranged on a bottom plate main body 2-1 of the rectangular bottom plate 2A and the triangular bottom plate 2B, the connecting columns 2-5 are installed on an output shaft 1-2 of a machine body assembly 1 through operating pieces 2-4 and lock tongues 2-7, meanwhile, the connecting columns 2-5 on the bottom plate main body 2-1 are connected with the corresponding support frames 1-3, the support frames 1-3 are of flexible structures and can limit the rotation of the bottom plate, so that the bottom plate can only revolve around the axis of the output shaft 1-2 to form revolution orbit movement, and the rectangular bottom plate 2A and the triangular bottom plate 2B are more suitable for fine grinding operation. The shape of the base plate is not limited to the rectangular base plate 2A and the triangular base plate 2B and the circular base plate 2C described above according to the use environment. The supporting frames 1-3 are utilized to realize the connection of the sander body and bottom plates in different forms, the sander body can be matched with the random orbital motion bottom plate and the revolution orbital motion bottom plate for use, the sander can be used under different purposes and operation environments, different polishing and polishing requirements of consumers are met, and the sander is more practical and functional.

In the multifunctional sander of the embodiment, a casing 1-1 is internally provided with a driving motor 1-4, the driving motor 1-4 is controlled by a switch 1-6 arranged on a holding part of the casing 1-1, the switch 1-6 is electrically connected with the driving motor 1-4 through a control circuit board, the driving motor 1-4 and an output shaft 1-2 can be driven by adopting an intermediate transmission mechanism such as a gear transmission mechanism, and a motor shaft of the driving motor 1-4 can also be used as the output shaft 1-4. Specifically, in the embodiment, a motor shaft 1-4-1 of the driving motor 1-4 is connected with an output shaft 1-2 through a connecting shaft 1-9, the connecting shaft 1-9 is supported in a shell 1-1 through a bearing, and a fan 1-5 is further arranged on the connecting shaft 1-9. The fan 1-5 is preferably a dual-function fan, that is, the fan 1-5 has two sets of blades, namely, the lower blade is used for dust collection, the upper blade is used for heat dissipation inside the machine body, the casing 1-1 is also provided with heat dissipation holes communicated with a motor cavity where the upper blade is located, and the heat dissipation holes can be used for quickly dissipating heat inside the machine body; the shell 1-1 is also provided with a dust collection port communicated with a lower cavity chamber where the lower fan blades are positioned, and the dust collection port is used for being connected with a dust collection box 1-7, so that the collection of grinding and polishing dust is convenient.

In addition, the sander of the embodiment can also provide power by adopting an alternating current power supply or direct current power supply mode, when the alternating current power supply is adopted, a power line for connecting a socket is arranged at the tail part of the sander, and when the direct current power supply is adopted, batteries 1-8 for supplying power are arranged at the tail part of the sander. Other structures and functions of the sander body are similar to those of the prior art, and are not described herein.

Referring to fig. 1, 6 to 9, in the multifunctional sanding machine of the present embodiment, when the base plate is installed, the output shaft 1-2 of the machine body assembly 1 is inserted into the shaft hole 2-3-1 of the eccentric shaft 2-3 of the base plate assembly 2, due to the positioning effect of the D-shaped cross section of the output shaft 1-2 and the shaft hole 2-3-1, the position of the hook 1-2-1 at the lower end of the output shaft 1-2 corresponds to the position of the latch 2-7-1 of the latch 2-7, the latch 2-7 is controlled to rotate to the unlocking position by the operating element 2-4, at this time, the hook 1-2-1 of the output shaft 1-2 can be inserted into the latch 2-7-1 of the latch 2-7, and then the operating element 2-4 is switched to the first operating position shown in fig. 8, at the moment, the bolt 2-7 rotates downwards under the action of the elastic piece 2-9, the latch catch 2-7-1 is used for locking the hook 1-2-1 of the output shaft 1-2, the axial binding force of the bottom plate is provided by the elastic piece 2-9, and the bottom plate bears upward reaction force when the sander works, so that the bottom plate cannot be loosened on the output shaft 1-2, and the bottom plate is not easy to be loosened due to mistaken touch of the operating piece 2-4. When the bottom plate is disassembled, the operating part 2-4 rotates the shaft to a second operating position, the operating part 2-4 is utilized to jack the lock tongue 2-7 upwards to the state shown in figure 9, at the moment, the lock catch 2-7-1 of the lock tongue 2-7 is separated from the clamping hook 1-2-1 of the output shaft 1-2, so that the output shaft 1-2 can be pulled out from the lock catch 2-7-1 and the shaft hole 2-3-1 of the eccentric shaft 2-3, and the quick disassembly and replacement of the bottom plate are realized.

According to the quick-change bottom plate of the sander and the multifunctional sander, the bottom plate is locked or unlocked by matching the operating element and the lock tongue, the lock tongue is used as an intermediate part to lock the bottom plate on the output shaft of the sander, the bottom plate is more stably connected, the connection strength is high, accidental loosening caused by mistaken touch or deformation of the operating element is not easy to occur, the structural design is simple and ingenious, and the bottom plate is simple and convenient to disassemble and assemble.

The present invention and its embodiments have been described above schematically, and the description is not intended to be limiting, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. The utility model provides a grinder quick change bottom plate which characterized in that: comprises a bottom plate main body (2-1), a bottom plate upper cover body (2-2), an eccentric shaft (2-3), an operating part (2-4) and a lock tongue (2-7), wherein the bottom plate upper cover body (2-2) is fixed on the upper part of the bottom plate main body (2-1), the eccentric shaft (2-3) is axially and rotatably arranged in the bottom plate upper cover body (2-2), the eccentric shaft (2-3) is eccentrically provided with a shaft hole (2-3-1) which is used for being matched with an output shaft (1-2) of a sanding machine in a transmission way, the lock tongue (2-7) is arranged on the eccentric shaft (2-3), the lock tongue (2-7) is provided with a lock catch (2-7-1) which is used for being matched with a clamping hook (1-2-1) on the output shaft (1-2), the lock tongue (2-7) is provided with an output shaft locking position and an output shaft unlocking position, and the operating piece (2-4) is provided with a first operating position and a second operating position which are matched with the lock tongue (2-7);

when the operating part (2-4) is positioned at the first operating position, the lock tongue (2-7) is positioned at the output shaft locking position and locked by buckling the lock catch (2-7-1) of the lock tongue (2-7) with the hook (1-2-1) of the output shaft (1-2);

when the operating part (2-4) is located at the second operating position, the lock tongue (2-7) is located at the output shaft unlocking position, and the lock tongue (2-7-1) of the lock tongue (2-7) is separated from the hook (1-2-1) of the output shaft (1-2) to unlock.

2. The quick-change base plate of the sanding machine as claimed in claim 1, characterized in that: the lock tongue (2-7) is hinged on the eccentric shaft (2-3), an elastic part (2-9) is arranged between the lock tongue (2-7) and the eccentric shaft (2-3), when the operating part (2-4) is positioned at a first operating position, the operating part (2-4) is separated from the lock tongue (2-7), and the lock tongue (2-7) is maintained at an output shaft locking position through the elastic part (2-9); when the operating piece (2-4) is switched from the first operating position to the second operating position, the operating piece (2-4) overcomes the elastic force of the elastic piece (2-9) to drive the bolt (2-7) to rotate to the unlocking position of the output shaft.

3. The quick-change base plate for the sanding machine as claimed in claim 2, wherein: the lower part of the eccentric shaft (2-3) is provided with a balance block (2-3-2), the lock tongue (2-7) is provided with a support arm (2-7-2), the support arm (2-7-2) is rotatably arranged on the balance block (2-3-2) through a rotating shaft (2-8), and the elastic part (2-9) is a torsion spring.

4. The quick-change base plate of the sanding machine as claimed in claim 1, characterized in that: the lock catch (2-7-1) is a D-shaped lock hole, and the cross section of the shaft hole (2-3-1) is also D-shaped.

5. The quick-change base plate of the sanding machine as claimed in claim 1, characterized in that: the eccentric shaft (2-3) is rotatably mounted on the upper cover body (2-2) of the bottom plate through a bottom plate bearing (2-6), the main body (2-1) of the bottom plate is provided with a positioning table (2-1-1), and the upper cover body (2-2) of the bottom plate is positioned on the main body (2-1) of the bottom plate through the positioning table (2-1-1) and fixedly connected through a screw.

6. The quick-change base plate for the sanding machine as claimed in any one of claims 1 to 5, wherein: the base plate main body (2-1) is a random orbital motion base plate or a revolution orbital motion base plate, and when the base plate main body (2-1) is the revolution orbital motion base plate, the base plate main body (2-1) is provided with a connecting column (2-5) matched with a support frame (1-3) on the sander.

7. The quick-change base plate for the sanding machine as claimed in claim 6, wherein: the operating part (2-4) for rotate install the locking lever on grinder quick change bottom plate, the locking lever be located the inboard part of bottom plate upper cover body (2-2) have push away top portion (2-4-1), the locking lever be located the bottom plate upper cover body (2-2) one end in the outside have rotation handle (2-4-2), rotation handle (2-4-2) drive push away top portion (2-4-1) rotate and control spring bolt (2-7) and switch between output shaft latched position and output shaft unblock position, bottom plate main part (2-1) or bottom plate upper cover body (2-2) on still locate and be used for keeping operating part (2-4) spacing arch (2-2-1) at first operating position.

8. The utility model provides a multi-functional grinder, includes organism assembly (1), organism assembly (1) including casing (1-1) with locate casing (1-1) interior controlled rotary motion's output shaft (1-2), its characterized in that: the quick-change base plate of the sanding machine as claimed in any one of claims 1 to 7, wherein the output shaft (1-2) has a cross-sectional shape which is inserted into the shaft hole (2-3-1) of the eccentric shaft (2-3) and transmits torque, and the lower end of the output shaft (1-2) is provided with a hook (1-2-1);

when the device is installed, the operating part (2-4) controls the lock tongue (2-7) to be located at an output shaft unlocking position, the output shaft (1-2) is inserted into the shaft hole (2-3-1) of the eccentric shaft (2-3), the clamping hook (1-2-1) extends out of the shaft hole (2-3-1), the operating part (2-4) is switched from a second operating position to a first operating position, the lock tongue (2-7) is controlled to be switched to an output shaft locking position, and a lock catch (2-7-1) on the lock tongue (2-7) is buckled with the clamping hook (1-2-1) of the output shaft (1-2) for locking;

when the device is disassembled, the operating piece (2-4) is switched from the first operating position to the second operating position, the lock tongue (2-7) is controlled to be switched to the unlocking position of the output shaft, and the lock tongue (2-7-1) of the lock tongue (2-7) is separated from the hook (1-2-1) of the output shaft (1-2) to unlock.

9. The multifunctional sanding machine according to claim 8, characterized in that: the lower part of the shell (1-1) is also provided with a support frame (1-3), and when the base plate main body (2-1) is a random orbital motion base plate, the sander quick-change base plate revolves around the output shaft (1-2) and also rotates around the eccentric shaft (2-3); when the bottom plate main body (2-1) is a revolution orbit movement bottom plate, the bottom plate main body (2-1) is connected with the support frame (1-3), and the sander quick-change bottom plate revolves around the output shaft (1-2) under the limiting effect of the support frame (1-6).

10. The multifunctional sanding machine according to claim 9, characterized in that: the fan-type air conditioner is characterized in that a driving motor (1-4) is arranged in the shell (1-1), a motor shaft (1-4-1) of the driving motor (1-4) is connected with an output shaft (1-2) through a connecting shaft (1-9), the connecting shaft (1-9) is supported in the shell (1-1) through a bearing, and a fan (1-5) is further arranged on the connecting shaft (1-9).