CN114888680B - Quick-change bottom plate of sander and multifunctional sander - Google Patents

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 invention relates to a quick-change bottom plate of a sanding machine, which comprises a bottom plate main body, a bottom plate upper cover body, an eccentric shaft, an operation piece 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 piece is positioned at the second operating position, the lock tongue is positioned at the unlocking position of the output shaft, and the lock catch of the lock tongue is separated from the clamping hook of the output shaft to unlock. According to the invention, the bottom plate is quickly disassembled and assembled by utilizing the cooperation of the operation piece and the lock tongue, the lock tongue is used as a middle part to lock the bottom plate on the output shaft of the sander, the bottom plate is connected stably, the connection strength is high, unexpected loosening caused by error touch or deformation of the operation piece is not easy to cause, the structural design is simple and ingenious, and the disassembly and the operation are 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

Sanding machines are a commonly used power tool for sanding and polishing operations. The hand-held sander is popular to the majority of users because of the advantages of convenient use, flexible operation and the like, and can be used for sanding the surfaces of wood products, metal products, plastic products, walls and the like. The common hand-held sander mainly comprises a machine body and a bottom plate, wherein the bottom plate is arranged on the machine body, and a motor in the machine body drives the bottom plate to do reciprocating swing motion through an eccentric mechanism, so that the workpiece is polished.

For different working environments, polishing accessories with different shapes, namely a bottom plate of the sander, are usually selected on the sander so as to meet different polishing working conditions. The common sanding machine bottom plate is provided with a triangular bottom plate, a rectangular bottom plate, a circular bottom plate and the like, the circular bottom plate is directly connected with an eccentric shaft of the machine body, and the circular bottom plate rotates around the eccentric shaft while revolving around an output shaft of the machine body to form random orbital motion; the triangular bottom plate and the rectangular bottom plate are connected with the eccentric shaft of the machine body and also connected with the machine body through the swinging support frame, so that the triangular bottom plate and the rectangular bottom plate only revolve and swing to form revolution orbit motion. The purposes and the use environments of the base plates of different sanding machines are different, so that the all-in-one sanding machine capable of flexibly replacing different base plates is certainly popular with consumers.

In the multifunctional sander with multiple functions, the base plate needs to be frequently detached and replaced, so that the quick-replacing structure of the base plate is indispensable to the multifunctional sander. The common quick-change structure of the bottom plate of the sander mostly adopts screw fasteners to connect the bottom plate with the eccentric shaft of the sander, and when the sander is disassembled, disassembly tools such as a spanner are needed, so that the disassembly operation is laborious and tedious. To this kind of problem, chinese patent No. ZL201821738178.6 discloses "a grinder bottom plate easy-to-detach mechanism and applied its grinder", its grinder bottom plate easy-to-detach mechanism includes the locking lever of installing on the grinder bottom plate and locates the pothook of connecting seat lower part, the work portion rotation of locking lever is installed on the upper portion link of grinder bottom plate, and the work portion of locking lever is equipped with the buckling parts that can lock or break away from with the pothook on the connecting seat through rotating the locking lever, the one end of locking lever still is equipped with and is used for driving work portion pivoted handle, utilize locking lever and pothook cooperation to realize the quick connect and tear open of bottom plate and grinder organism. 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 lock rod and the clamping hook, and the operating handle of the lock rod is easy to loose accidentally due to false touch or deformation of the lock rod.

Disclosure of Invention

1. Technical problem to be solved by the invention

The invention aims to overcome the defects of poor connection strength, easy accidental loosening caused by false touch and the like of the prior sanding machine bottom plate quick-assembly structure, and provides a sanding machine quick-change bottom plate and a multifunctional sanding machine.

2. Technical proposal

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

the invention relates to a quick-change bottom plate of a sanding machine, which comprises a bottom plate main body, a bottom plate upper cover body, an eccentric shaft, an operating piece 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 piece 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 with the clamping hook of the output shaft;

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

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

Furthermore, the lower part of the eccentric shaft is provided with a balance weight, the lock tongue is provided with a support arm, the support arm is rotatably arranged on the balance weight through a rotating shaft, and the elastic piece 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 arranged on the bottom plate upper cover body through a bottom plate bearing, a positioning table is arranged on the bottom plate main body, and the bottom plate upper cover body is positioned on the bottom plate main body through the positioning table and fixedly connected through screws.

Further, the base plate body is a random orbital motion base plate or a revolution orbital motion base plate, and when the base plate body is a revolution orbital motion base plate, a connecting column matched with a support frame on the sander is arranged on the base plate body.

Furthermore, the operating member is a lock rod rotatably mounted on the quick-change bottom plate of the sanding machine, a push top is arranged on the part, located on the inner side of the upper cover body, of the bottom plate, a rotating handle is arranged at one end, located on the outer side of the upper cover body, of the lock rod, the rotating handle drives the push top to rotate so as to control the lock tongue to switch between an output shaft locking position and an output shaft unlocking position, and a limiting protrusion used for keeping operation at a first operating position is further arranged on the bottom plate main body or the upper cover body of the bottom plate.

The invention relates to a multifunctional sander, which comprises a sander body assembly, wherein the sander body assembly comprises a shell, an output shaft arranged in the shell and capable of controlling rotary motion, and the sander quick-change bottom plate, wherein 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 lock tongue is installed, the operating piece controls the lock tongue to be positioned 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 piece 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 catch on the lock tongue is buckled with the clamping hook of the output shaft to be locked;

when the lock is detached, the operation piece is switched from the first operation position to the second operation position, the lock tongue is controlled to be switched to the unlocking position of the output shaft, and the lock catch of the lock tongue is separated from the clamping hook of the output shaft to unlock.

Further, a supporting frame is arranged at the lower part of the shell, and when the bottom plate main body is a random orbital motion bottom plate, the sanding machine quickly changes the bottom plate to revolve around the output shaft and also rotates around the eccentric shaft; when the bottom plate main body is a revolution orbit motion bottom plate, the bottom plate main body is connected with the support frame, and the sanding machine 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 invention relates to a quick-change bottom plate of a sanding machine and a multifunctional sanding machine, wherein the quick-change bottom plate of the sanding machine comprises a bottom plate main body, a bottom plate upper cover body, an eccentric shaft, an operation piece and a lock tongue, wherein the lock tongue is provided with an output shaft locking position and an output shaft unlocking position, the operation piece is provided with a first operation position and a second operation position matched with the lock tongue, when the operation piece is positioned at the first operation position, the lock tongue is positioned at the output shaft locking position and is locked by buckling a lock catch of the lock tongue with a clamping hook of an output shaft; when the operating piece is positioned at the second operating position, the lock tongue is positioned at the unlocking position of the output shaft, and the lock catch of the lock tongue is separated from the clamping hook of the output shaft to unlock; the bottom plate and the output shaft of the sander are locked or unlocked by utilizing the cooperation of the operation piece and the lock tongue, the lock tongue is used as a middle part to lock the bottom plate on the output shaft of the sander, the bottom plate is connected more stably, the connection strength is high, unexpected loosening is not easy to be caused by the error touch or deformation of the operation piece, the structural design is simple and ingenious, and the disassembly and the operation of the bottom plate are simple and convenient;

(2) According to the quick-change bottom plate of the sander and the multifunctional sander, the lock tongue is hinged to the eccentric shaft, the elastic piece is arranged between the lock tongue and the eccentric shaft, when the operation piece is positioned at the first operation position, the operation piece is separated from the lock tongue, and the lock tongue is maintained at the locking position of the output shaft through the elastic piece; when the operation piece is switched from the first operation position to the second operation position, the operation piece overcomes the elasticity 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 operation piece is not contacted with the lock tongue, the locking position of the lock tongue is kept by the elastic piece, the operation piece does not directly participate in the locking of the bottom plate, and the problem of unexpected loosening caused by the false touch or deformation of the operation piece is effectively solved; when the bottom plate is disassembled, the spring force of the elastic piece is overcome by the operation piece to drive the lock tongue to be switched to the unlocking position, so that the unlocking and the disassembling of the bottom plate are realized, and the operation is simple and convenient;

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

(4) According to the quick-change bottom plate of the sander and the multifunctional sander, the lock catch of the sander 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 facilitate 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, so that the transmission is more stable and reliable;

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

(6) The invention relates to a quick-change bottom plate of a sander and a multifunctional sander, wherein the 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 a revolution orbital motion bottom plate, a connecting column matched with a support frame on the sander is arranged on the bottom plate main body, the quick-change bottom plate of the sander can be used for bottom plates in different forms, and the matched sander can be combined to form the multifunctional sander;

(7) The invention relates to a quick-change bottom plate of a sanding machine and a multifunctional sanding machine.A lock rod rotatably arranged on the quick-change bottom plate of the sanding machine is used as an operation piece, a push top is arranged at the part of the lock rod positioned at the inner side of an upper cover body of the bottom plate, a rotating handle is arranged at one end of the lock rod positioned at the outer side of the upper cover body of the bottom plate, the rotating handle drives the push top to rotate so as to control a lock tongue to switch between an output shaft locking position and an output shaft unlocking position, and a limit bulge for keeping operation at a first operation position is also arranged on a bottom plate main body or the upper cover body of the bottom plate;

(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 is controlled to rotate, the sander also comprises the quick-change bottom plate, the output shaft is provided with a cross section 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 element 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 element 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 a lock catch on the lock tongue is buckled with the clamping hook of the output shaft to be locked; when the lock is detached, the operation piece is switched from the first operation position to the second operation position, the lock tongue is controlled to be switched to the unlocking position of the output shaft, and the lock catch of the lock tongue is separated from the clamping hook of the output shaft to unlock; the base plate of the multifunctional sander is greatly convenient to replace, and the base plate is more firmly and stably connected on the sander body;

(9) The invention relates to a multifunctional sander, wherein a support frame is arranged at the lower part of a shell of the multifunctional sander, and when a base plate main body is a base plate which moves along a random orbit, the sander quickly changes the base plate to revolve around an output shaft and also rotates around an eccentric shaft; when the bottom plate main body is a revolution orbit motion bottom plate, the bottom plate main body is connected with the support frame, the sanding machine quick-change bottom plate revolves around the output shaft under the limiting effect of the support frame, the machine body is connected with the bottom plates in different forms by utilizing the support frame, and the machine body can be matched with the random orbit motion bottom plate and the revolution orbit motion bottom plate for use, so that the sanding machine can be used under different purposes and working environments, different polishing and polishing requirements of consumers are met, and the sanding machine has higher practicability and functionality.

Drawings

FIG. 1 is a schematic diagram showing a multifunctional sander of the present invention in combination with a different base plate;

FIG. 2 is a schematic perspective view of a quick-change bottom plate of a sander according to the present invention;

FIG. 3 is a schematic diagram of a disassembly structure of a quick-change bottom plate of a sander according to the present invention;

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

fig. 5 is a schematic cross-sectional view of a quick-change bottom plate of a sander (output shaft unlocked state);

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

FIG. 7 is a schematic diagram showing a state of a machine body and a base plate of a multifunctional sander according to the present invention;

FIG. 8 is a schematic cross-sectional view of a multifunctional sander according to the present invention (output shaft locked state);

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

Reference numerals in the schematic drawings illustrate:

1. a body assembly; 1-1, a shell; 1-2, an output shaft; 1-2-1, and a clamping hook; 1-3, supporting frames; 1-4, driving a motor; 1-4-1, a 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 base plate assembly; 2A, a rectangular bottom plate; 2B, a triangular bottom plate; 2C, a circular bottom plate; 2-1, a base plate main body; 2-1-1, a positioning table; 2-2, a cover body on the bottom plate; 2-2-1, limiting protrusions; 2-3, eccentric shaft; 2-3-1, shaft hole; 2-3-2, balancing weight; 2-3-3, a first rotating shaft hole; 2-4, an operating member; 2-4-1, ejection portion; 2-4-2, a rotating handle; 2-5, connecting columns; 2-6, a bottom plate bearing; 2-7, a lock tongue; 2-7-1, locking; 2-7-2, support arm; 2-7-3, a second rotating shaft hole; 2-8, a rotating shaft; 2-9, an elastic piece.

Detailed Description

For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples.

Example 1

Referring to fig. 1 to 5, a quick-change bottom plate of a sander according to this embodiment includes a bottom plate main body 2-1, a bottom plate upper cover 2-2, an eccentric shaft 2-3, an operation member 2-4 and a lock tongue 2-7, wherein the bottom plate upper cover 2-2 preferably adopts a circular cover structure, the bottom plate upper cover 2-2 is fixed on the upper portion of the bottom plate main body 2-1, an installation cavity is formed between the bottom plate upper cover 2-2 and the bottom plate main body 2-1, the eccentric shaft 2-3 is axially and rotatably installed in the bottom plate upper cover 2-2, the eccentric shaft 2-3 is eccentrically provided with a shaft hole 2-3-1 for driving cooperation with an output shaft 1-2 of the sander, and a certain eccentric distance is provided between the axis of the shaft 2-3-1 and the axis of the eccentric shaft 2-3, and the eccentric shaft 2-3 can be selected as required, so that a sander bottom plate with different eccentric distances 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 which is used for being matched with the 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, the lock tongue 2-7 can be in locking connection with the output shaft 1-2 of the sander at the output shaft locking position, and the output shaft 1-2 can be released at the output shaft unlocking position. 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, the first operating position of the operating piece 2-4 corresponds to the locking position of the output shaft, the second operating position corresponds to the unlocking position of the output shaft, when the operating piece 2-4 is positioned at the first operating position, the lock tongue 2-7 is positioned at the locking position of the output shaft, and the lock tongue 2-7 is locked by buckling the lock catch 2-7-1 of the lock tongue 2-7 with the clamping hook 1-2-1 of the output shaft 1-2; when the operating member 2-4 is located at the second operating position, the lock tongue 2-7 is located at the unlocking position of the output shaft, and the lock catch 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. The bottom plate is locked or unlocked with the output shaft 1-2 of the sander by utilizing the cooperation of the operating piece 2-4 and the lock tongue 2-7, the lock tongue 2-7 is used as a middle part to lock the bottom plate on the output shaft 1-2 of the sander, the bottom plate is connected more stably, the connection strength is high, unexpected loosening is not easy to be caused by the error touch or deformation of the operating piece 2-4, 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 this embodiment, the lock tongue 2-7 is hinged on the eccentric shaft 2-3, and an elastic member 2-9 is further disposed between the lock tongue 2-7 and the eccentric shaft 2-3, and when the operating member 2-4 is located at the first operating position (as shown in fig. 4), the operating member 2-4 is separated from the lock tongue 2-7, and the lock tongue 2-7 is maintained at the locking position of the output shaft by the elastic member 2-9; when the operating member 2-4 is switched from the first operating position to the second operating position (as shown in fig. 5), the operating member 2-4 overcomes the elastic force of the elastic member 2-9 to drive the lock tongue 2-7 to rotate to the output shaft unlocking position. By adopting the design, when the bottom plate is installed, the operation piece 2-4 is not contacted with the lock tongue 2-7, the elastic piece 2-9 is used for keeping the locking position of the lock tongue 2-7, the operation piece 2-4 does not directly participate in the locking of the bottom plate, and the problem of unexpected loosening caused by the false touch or deformation of the operation piece 2-4 is effectively solved; when the bottom plate is disassembled, the spring force of the elastic piece 2-9 is overcome by the operating piece 2-4 to drive the lock tongue 2-7 to be switched to the unlocking position, so that the unlocking and the disassembling of the bottom plate are realized, and the operation is simple and convenient. Of course, a mode that the operating piece 2-4 overcomes the elasticity of the elastic piece 2-9 to drive the lock tongue 2-7 to be in the output shaft locking position can also be adopted, in this case, when the operating piece 2-4 is separated from the lock tongue 2-7, the lock tongue 2-7 is maintained in the output shaft unlocking position through the elastic piece 2-9, the mode uses the operating piece 2-4 to apply locking force to the lock tongue 2-7, uses the lock tongue 2-7 to lock the output shaft 1-2, and the axial force of the bottom plate does not directly act on the operating piece 2-4, so that the connection strength of the bottom plate can be improved, and the bottom plate is not easy to fall off. Further, a balance weight 2-3-2 is arranged at the lower part of the eccentric shaft 2-3, a support arm 2-7-2 is arranged on the lock tongue 2-7, the support arm 2-7-2 is rotatably arranged on the balance weight 2-3-2 through a rotating shaft 2-8, and an elastic piece 2-9 is a torsion spring. Specifically as shown in fig. 3, a first rotating shaft hole 2-3-3 is formed in a balance block 2-3-2, a second rotating shaft hole 2-7-3 is formed in support arms 2-7-2 on two sides of a lock tongue 2-7, a torsion spring is sleeved on a 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, the lock tongue 2-7 is rotatably connected to the balance block 2-3-2, one elastic arm of the torsion spring abuts against the lock tongue 2-7, and the other elastic arm abuts against the balance block 2-3-2. The lock tongue 2-7 and the elastic piece 2-9 are used as a part of the balance weight 2-3-2, so that eccentric vibration of the sander can be reduced, the lock tongue 2-7 and the torsion spring are simple and compact in structure, convenient to assemble and manufacture, and stable in bottom plate disassembly and replacement operation. The lock tongue 2-7 in the embodiment is preferably made of a metal sheet metal part, the lock catch 2-7-1 is a D-shaped lock hole, the D-shaped lock hole can facilitate 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 by utilizing the clamping hook, 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 shape of a D, the shaft hole 2-3-1 in the shape of the D 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 fig. 2 and 3, in the present embodiment, the eccentric shaft 2-3 is rotatably mounted on the bottom plate upper cover 2-2 through the bottom plate bearing 2-6, the outer ring of the bottom plate bearing 2-6 is interference-mounted in the bearing mounting cavity of the bottom plate upper cover 2-2, and the eccentric shaft 2-3 is interference-mounted in the inner ring of the bottom plate bearing 2-6, so that the eccentric shaft 2-3 can be mounted on the bottom plate upper cover 2-2. 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 fixedly connected through screws. The bottom plate upper cover body 2-2 and the bottom plate main body 2-1 adopt a split structure and are assembled and fixed together by adopting screws, so that the structure is simple, the manufacture is convenient, and the assembly and the manufacture of the bottom plate of the sander are convenient.

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

Referring to fig. 2 to 5, in this embodiment, the operating member 2-4 is preferably a lock lever rotatably mounted on a quick-change bottom plate of a sander, a portion of the lock lever located inside the bottom plate upper cover 2-2 has a push top 2-4-1, one end of the lock lever located outside the bottom plate upper cover 2-2 has a rotation handle 2-4-2, and the rotation handle 2-4-2 drives the push top 2-4-1 to rotate to control the lock tongue 2-7 to switch between an output shaft locking position and an output shaft unlocking position, and a limit protrusion 2-2-1 for holding the operating member 2-4 in the first operating position is further provided on the bottom plate main body 2-1 or the bottom plate upper cover 2-2 to prevent the operating member 2-4 from being released due to erroneous contact. Specifically, the rotating parts at two ends of the operating piece 2-4 are installed between the bottom plate main body 2-1 and the bottom plate upper cover body 2-2, the pushing part 2-4-1 is located below the lock tongue 2-7, when the operating piece 2-4 is located at the first operating position, the pushing part 2-4-1 does not apply upward thrust to the lock tongue 2-7, and when the operating piece 2-4 rotates to the second operating position, the lock tongue 2-7 is pushed to be lifted upwards by the pushing part 2-4-1, so that the lock tongue 2-7 is unlocked with the 1-2 of the output shaft. The operating piece 2-4 adopts a lock rod design, has simple structure, convenient manufacture and flexible operation. Of course, the operating members 2-4 may be designed with a knob or push button or the like that performs the same function and function, in addition to the lock lever.

As shown in fig. 6 to 9, the present embodiment also discloses a multifunctional sander comprising a body assembly 1 and a base plate assembly 2 mounted on the body assembly 1, the body assembly 1 comprising a housing 1-1 and an output shaft 1-2 provided in the housing 1-1 for controlled rotational movement, the output shaft 1-2 having a cross-sectional shape for inserting into and transmitting torque from a shaft hole 2-3-1 of an eccentric shaft 2-3, the lower end of the output shaft 1-2 having a hook 1-2-1. When the bottom plate assembly 2 adopts the quick-change bottom plate of the sanding machine, the operating piece 2-4 controls the lock tongue 2-7 to be positioned at the unlocking position of the output shaft, 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 piece 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 locking position of the output shaft, and the 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 to be locked (as shown in figure 8); when the lock is detached, 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 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 to be unlocked (as shown in fig. 9). The multifunctional sander is greatly convenient for the replacement operation of the bottom plate of the multifunctional sander, and the bottom plate is more firmly and stably connected on the sander body.

Referring to fig. 1, a multifunctional sander according to the present embodiment is provided with a support frame 1-3 at the lower part of a housing 1-1, and when a base plate main body 2-1 is a base plate moving in a random orbit, the sander quickly changes the base plate to revolve around an output shaft 1-2 and also rotates around an eccentric shaft 2-3; when the bottom plate main body 2-1 is a revolution orbit motion bottom plate, the bottom plate main body 2-1 is connected with the support frame 1-3, and the sanding machine quick-change bottom plate revolves around the output shaft 1-2 under the limiting effect of the support frame 1-3. The circular bottom plate 2C of random orbital motion bottom plate in figure 1, it is installed on the output shaft 1-2 of organism assembly 1 through operating piece 2-4 and spring bolt 2-7, circular bottom plate 2C and support frame 1-3 do not contact, during operation, output shaft 1-2 drives the eccentric shaft 2-3 rotation on the circular bottom plate 2C for circular bottom plate 2C revolves around the axis of output shaft 1-2, and circular bottom plate 2C can freely rotate around the axis of eccentric shaft 2-3 simultaneously, forms random orbital motion, and circular bottom plate 2C's rotational speed is higher this moment, is more suitable for the coarse grinding. The revolution orbit motion base plate is as the rectangular base plate 2A and the triangular base plate 2B in figure 1, the base plate main body 2-1 of the rectangular base plate 2A and the triangular base plate 2B is provided with a connecting column 2-5 matched with a supporting frame 1-3, the connecting column 2-5 is arranged on the output shaft 1-2 of the machine body assembly 1 through an operating piece 2-4 and a lock tongue 2-7, meanwhile, the connecting column 2-5 on the base plate main body 2-1 is connected with the corresponding supporting frame 1-3, the supporting frame 1-3 is of a flexible structure, the rotation of the base plate can be limited, the base plate can only revolve around the axis of the output shaft 1-2 to form revolution orbit motion, and the rectangular base plate 2A and the triangular base plate 2B are more suitable for accurate 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 different use environments. The machine body is connected with the base plates in different forms by utilizing the supporting frames 1-3, and can be matched with the base plates in random orbital motion and the base plates in revolution orbital motion for use, so that the sander can be used in different purposes and working environments, different polishing and polishing requirements of consumers are met, and the sander has higher practicability and functionality.

In the multifunctional sander of the embodiment, a driving motor 1-4 is arranged in a shell 1-1, the driving motor 1-4 is controlled by a switch 1-6 arranged on a holding part of the shell 1-1, the switch 1-6 is electrically connected with the driving motor 1-4 through a control circuit board, an intermediate transmission mechanism such as a gear transmission mechanism can be adopted between the driving motor 1-4 and an output shaft 1-2 for transmission, and a motor shaft of the driving motor 1-4 can also be used as the output shaft 1-4. In this embodiment, the motor shaft 1-4-1 of the driving motor 1-4 is connected with the output shaft 1-2 through the connecting shaft 1-9, the connecting shaft 1-9 is supported in the housing 1-1 through a bearing, and the fan 1-5 is further provided on the connecting shaft 1-9. The fan 1-5 is preferably a dual-function fan, namely the fan 1-5 is provided with an upper fan blade and a lower fan blade, the lower fan blade is used for dust collection, the upper fan blade is used for heat dissipation in the machine body, the shell 1-1 is also provided with a heat dissipation hole communicated with a motor cavity where the upper fan blade is positioned, and the heat dissipation hole can be used for rapidly dissipating the heat in the machine body; the shell 1-1 is also provided with a dust collection opening communicated with the lower cavity where the lower fan blade is positioned and used for connecting the dust collection box 1-7, so that the dust collection box is convenient for polishing and polishing dust collection.

In addition, the sander of the embodiment can also adopt an alternating current power supply or a direct current power supply mode to provide power, 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 will not be described further herein.

Referring to fig. 1, 6-9, 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, because the output shaft 1-2 and the shaft hole 2-3-1"D" are positioned, the position of the hook 1-2-1 at the lower end of the output shaft 1-2 corresponds to the position of the lock catch 2-7-1 of the lock tongue 2-7, the lock tongue 2-7 is controlled to rotate to the unlocking position by the operating element 2-4, the hook 1-2-1 of the output shaft 1-2 can be inserted into the lock catch 2-7-1 of the lock tongue 2-7, then the operating element 2-4 is switched to the first operating position shown in fig. 8, the lock tongue 2-7 is rotated downwards under the action of the elastic element 2-9, the hook 1-2-1 of the output shaft 1-2 is locked by the elastic element 2-9, the axial binding force of the base plate is provided by the elastic element 2-9, and the base plate is easily released by the upward reaction force of the output shaft 2-7 during the operation of the sander, and the base plate is not released by the error of the operating element 2-4. When the bottom plate is disassembled, the operating piece 2-4 rotates the shaft to a second operating position, the operating piece 2-4 is utilized to jack up the lock tongue 2-7 to the state shown in fig. 9, and 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 the replacement of the bottom plate are realized.

According to the quick-change bottom plate of the sander and the multifunctional sander, the bottom plate and the output shaft of the sander are locked or unlocked by matching the operating piece with the lock tongue, the lock tongue serves as a middle part to lock the bottom plate on the output shaft of the sander, the bottom plate is connected more stably, the connection strength is high, unexpected loosening is not easy to occur due to error touch or deformation of the operating piece, the structural design is simple and ingenious, and the bottom plate is easy and convenient to disassemble and assemble.

The invention and its embodiments have been described above schematically, without limitation, and the actual construction is not limited to this, as it is shown in the drawings, which are only one of the embodiments of the invention. Therefore, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical scheme are not creatively devised without departing from the gist of the present invention, and all the structural manners and the embodiments belong to the protection scope of the present invention.

Claims (10)

1. A quick-change bottom plate of a sander is characterized in that: the electric sander comprises a base plate main body (2-1), a base plate upper cover body (2-2), an eccentric shaft (2-3), an operating piece (2-4) and a lock tongue (2-7), wherein the base plate upper cover body (2-2) is fixed at the upper part of the base plate main body (2-1), the eccentric shaft (2-3) is axially and rotatably arranged in the base plate upper cover body (2-2), the eccentric shaft (2-3) is eccentrically provided with a shaft hole (2-3-1) for being in transmission fit with an output shaft (1-2) of the sander, 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) 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 matched with the lock tongue (2-7);

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

when the operating piece (2-4) is positioned at the second operating position, the lock tongue (2-7) is positioned at the unlocking position of the output shaft, and 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) to unlock.

2. The quick change base plate of a sander according to claim 1, wherein: the lock tongue (2-7) is hinged to the eccentric shaft (2-3), an elastic piece (2-9) is further arranged between the lock tongue (2-7) and the eccentric shaft (2-3), when the operating piece (2-4) is located at the first operating position, the operating piece (2-4) is separated from the lock tongue (2-7), and the lock tongue (2-7) is maintained at the locking position of the output shaft through the elastic piece (2-9); when the operation piece (2-4) is switched from the first operation position to the second operation position, the operation piece (2-4) overcomes the elasticity of the elastic piece (2-9) to drive the lock tongue (2-7) to rotate to the unlocking position of the output shaft.

3. A quick change base plate for a sander according to claim 2, wherein: the lower part of the eccentric shaft (2-3) is provided with a balance weight (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 weight (2-3-2) through a rotating shaft (2-8), and the elastic piece (2-9) is a torsion spring.

4. The quick change base plate of a sander according to claim 1, wherein: 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 a sander according to claim 1, wherein: the eccentric shaft (2-3) is rotatably arranged on the bottom plate upper cover body (2-2) through the bottom plate bearing (2-6), the bottom plate main body (2-1) is provided with the positioning table (2-1-1), 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 fixedly connected through screws.

6. A quick change base plate for a sander according to 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 a revolution orbital motion base plate, a connecting column (2-5) matched with a supporting frame (1-3) on the sander is arranged on the base plate main body (2-1).

7. The quick change base plate of a sander of claim 6, wherein: the operating piece (2-4) is a lock rod which is rotatably arranged on a quick-change bottom plate of the sanding machine, a push top (2-4-1) is arranged on the inner side of the bottom plate upper cover body (2-2) of the lock rod, a rotating handle (2-4-2) is arranged at one end of the lock rod, which is positioned on the outer side of the bottom plate upper cover body (2-2), the rotating handle (2-4-2) drives the push top (2-4-1) to rotate to control the lock tongue (2-7) to switch between an output shaft locking position and an output shaft unlocking position, and a limiting bulge (2-2-1) for keeping the operating piece (2-4) at a first operating position is further arranged on the bottom plate main body (2-1) or the bottom plate upper cover body (2-2).

8. The utility model provides a multifunctional sander, includes organism assembly (1), organism assembly (1) include casing (1-1) and locate output shaft (1-2) of controlled rotary motion in casing (1-1), its characterized in that: the quick-change bottom plate of the sander also comprises any one of claims 1 to 7, wherein the output shaft (1-2) is provided with a cross-sectional shape which is inserted into a 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 clamping hook (1-2-1);

when the lock is installed, the operating piece (2-4) controls the lock tongue (2-7) to be positioned at the unlocking position of the output shaft, 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 piece (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 locking position of the output shaft, and the 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) to be locked;

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

9. The multifunctional sander as set forth in claim 8, wherein: the lower part of the shell (1-1) is also provided with a supporting frame (1-3), and when the bottom plate main body (2-1) is a random orbital motion bottom plate, the sanding machine quickly changes the rotation of the bottom plate around the eccentric shaft (2-3) while revolving around the output shaft (1-2); when the bottom plate main body (2-1) is a revolution orbit motion bottom plate, the bottom plate main body (2-1) is connected with the support frame (1-3), and the sanding machine quick-change bottom plate revolves around the output shaft (1-2) under the limiting effect of the support frame (1-3).

10. The multifunctional sander as set forth in claim 9, wherein: the motor 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).

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