CN114800188B

CN114800188B - But quick assembly disassembly's electronic abrasive band machine

Info

Publication number: CN114800188B
Application number: CN202210428716.6A
Authority: CN
Inventors: 卢军; 万延旭
Original assignee: Zhejiang YAT Electrical Appliance Co Ltd
Current assignee: Zhejiang YAT Electrical Appliance Co Ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2023-07-18
Anticipated expiration: 2042-04-22
Also published as: CN114800188A

Abstract

The invention provides an electric belt sander capable of being quickly disassembled and assembled, which comprises: a motor surrounded by a motor housing; and a mounting case which is disposed on the motor case and accommodates an output end of the motor therein; and a working unit having: one end of the first connecting arm is provided with an inserting port; a second coupling arm, part of which is arranged on the first coupling arm through the insertion port, and the rest part of which extends to the outside of the installation shell; the abrasive belt is arranged on the output end of the second connecting arm and the motor and is used for polishing the processing object; the first connecting arm is also provided with an elastic reset structure, and the elastic reset structure can realize reciprocating movement crossing the assembly direction of the second connecting arm through the application of force or not. The belt pulley body can be integrally disassembled and pulled out by pressing, so that quick replacement is realized, the assembly efficiency is greatly improved, and the belt pulley is convenient to adjust and use under different working conditions.

Description

But quick assembly disassembly's electronic abrasive band machine

Technical Field

The invention relates to the technical field of electric tools, in particular to an electric belt sander capable of being quickly disassembled and assembled.

Background

The working part of the existing hand-held electric belt sander consists of a sanding belt, a front wheel part and a rear wheel part, wherein the rear wheel part is fixed on a machine body, and the front wheel part is usually detachable, so that the front wheel parts with different sizes and specifications are replaced, and different working scenes can be conveniently dealt with.

The prior art of belt sander with removable belt as disclosed in patent document 1 comprises a main body having at least a holding portion, a driving portion connected to the main body and providing a working power for the belt, and a mounting assembly comprising a main driving wheel connected to the driving portion, a mounting base connected to the main body or the driving portion, and a removable auxiliary driving wheel connected to the mounting base and relatively far from the other end of the main driving wheel, wherein the relative distance between the main driving wheel and the removable auxiliary driving wheel is defined as a mounting section capable of mounting the belt, and a first assembling section and a second assembling section are provided on the connecting end sides of the mounting base and the removable auxiliary driving wheel and are matched to form a fixed connection relationship, so that the belt with different lengths or widths can be ground according to the removable auxiliary driving wheel with different specifications by adjusting the length of the mounting section.

As can be seen from the accompanying drawings of patent document 1, only the wheel body part of the front wheel can be replaced, and in the actual use process, after the size of the wheel body is changed, the wheel arm part of the front wheel needs to be correspondingly changed to adapt to the change, otherwise, the abrasion in the abrasive belt polishing process is easy to cause; moreover, the detachable process is realized by means of disassembling and screwing the fastener, and the process is still complicated and inconvenient for replacement.

Patent document 1CN208945846U.

Disclosure of Invention

The invention provides the electric belt sander capable of being quickly disassembled and assembled, which is more efficient and convenient to use.

The invention solves the technical problems by adopting the following technical scheme: an electric belt sander capable of being quickly disassembled and assembled, comprising: a driving part including a motor surrounded by a motor housing;

and a mounting portion including a mounting housing disposed on the motor housing and accommodating an output end of the motor therein;

and a working unit having:

a first connecting arm which is arranged in the installation shell and one end of which is provided with an inserting port;

a second coupling arm, part of which is arranged on the first coupling arm through the insertion port, and the rest part of which extends to the outside of the installation shell;

the abrasive belt is arranged on the output end of the second connecting arm and the motor and is used for polishing the processing object;

the first connecting arm is also provided with an elastic reset structure, the elastic reset structure can realize reciprocating movement crossing the assembly direction of the second connecting arm through the application of force, and the second connecting arm is detachably connected with the first connecting arm through the elastic reset structure.

In several embodiments, the resilient return structure comprises:

the movable piece is arranged on the first connecting arm in a way of intersecting with the dismounting movement direction of the second connecting arm and is provided with a first movable section and a second movable section which are connected end to end, and the widths of the first movable section and the second movable section on the horizontal section are different;

the elastic piece is arranged in the first connecting arm and matched with the movable piece, the elastic piece provides elasticity and limits the movable piece to a certain height, the elastic force of the elastic piece can be overcome by externally applying force to the movable piece, and the movable piece can move along the direction of the applied force.

In several embodiments, one end of the second coupling arm is provided with a wheel body matched with the abrasive belt, and the opposite end of the second coupling arm is provided with an opening extending inwards, and the opening is penetrated by the movable piece.

In several embodiments, the opening is sequentially divided into a first opening section and a second opening section from the opposite end of the second connecting arm to one end of the wheel body, the second opening section can be penetrated by the first moving section and the second moving section, and the first opening section is penetrated by the first moving section only.

In several embodiments, the elastic reset structure further includes a pressing member, where the pressing member is located outside the first connecting arm and protrudes outside the mounting housing, the elastic member is disposed between the pressing member and the first connecting arm, one end of the first movable section penetrates out of the first connecting arm and is connected with the pressing member, and the second movable section cannot penetrate out of the first connecting arm.

In several embodiments, the first connecting arm includes a main base and a support, the support is used to cover an opening at an upper end of the main base, and a movement space for inserting the second connecting arm and the movable member is formed between the main base and the support.

In several embodiments, a guiding hole is provided in the main seat, and the second movable section is disposed in the guiding hole and can move along the guiding hole.

In several embodiments, the main seat is provided with an elastic body and a limiting block, the limiting block can move within a certain range of the main seat, and the second connecting arm is assembled to the connecting arm and is contacted with the limiting block at one time.

In several embodiments, a pin body is disposed in the first coupling arm, the pin body is disposed between the movable member and the stopper, a space exists between the stopper and the pin body, and the first opening section can pass through the pin body and move toward one end of the stopper.

In several embodiments, a handle and a foot are also connected in sequence at one end of the motor housing.

The belt pulley body is provided with the elastic reset structure, the whole disassembling and pulling action of the two parts of the connecting arm of the belt pulley body can be realized only by pressing, and then the two parts of the connecting arm can be quickly disassembled and assembled, so that the quick replacement is realized, the assembly efficiency is greatly improved, and the belt pulley body is convenient to adjust and use under different working conditions.

Drawings

The drawings described herein are for illustration purposes only of selected embodiments and are not intended to represent all possible implementations and should not be construed as limiting the scope of the present invention.

Fig. 1 schematically shows the overall structure of an electric belt sander of an embodiment;

FIG. 2 schematically illustrates a partially exploded structure of FIG. 1;

FIG. 3 schematically illustrates an exploded view of the first and second link arms and the resilient return structure of FIG. 1;

fig. 4 schematically shows the structure of the second link arm in fig. 3;

fig. 5 schematically illustrates an internal structure of the main housing of fig. 3;

fig. 6 schematically illustrates the structure of fig. 3 in a locked engagement state;

FIG. 7 schematically illustrates the structure of FIG. 3 in a loose-fitting state;

fig. 8 schematically shows the structure of fig. 3 in a configuration of a different coupling arm two.

Detailed Description

In the following, embodiments of the present invention will be described in detail, for the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, and in the following, technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments.

Thus, the following detailed description of the embodiments of the invention, which is provided herein, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention, based on which all other embodiments, as derived by a person of ordinary skill in the art without making any inventive effort, are within the scope of the invention.

The terminology used herein is for the purpose of describing embodiments and is not intended to be limiting and/or limiting of the invention.

For example, "in a certain direction", "parallel", "orthogonal", "center", "opposite", "front-rear-left-right", and the like indicate expressions of relative or absolute arrangement, and indicate not only such arrangement in a strict sense but also a state of relative displacement with tolerance or with an angle or distance that can obtain the same degree of function.

Referring to fig. 1-2, the electric belt sander provided by the invention is at least composed of a driving part, an installation part and a working part, wherein the driving part mainly comprises a driving motor for providing power, the driving motor is correspondingly arranged in a motor shell 1, a handle part 2 and a foot part 3 at the far end of the handle part 2 are arranged on the motor shell 1 in a partially extending way, and the motor shell is matched with a power supply for use.

The mounting part is here formed by a mounting housing 4, the mounting housing 4 here being constructed as a main housing 402 and a detachable end cap 401, fig. 2 being a construction in which the end cap 401 is in an open state, whereby an accommodation space is formed inside, after the main housing 402 is connected to the motor housing 1, the output shaft end of the internal motor being located inside the mounting housing 4, whereby the sanding belt can be driven for sanding after the working part has been assembled.

Referring to the structure of fig. 1-5, the working part is composed of a first coupling arm 10, a second coupling arm 20, an abrasive belt 30 and an elastic restoring structure 40, wherein the first coupling arm 10 is fixedly installed in the installation housing 4, one end of the first coupling arm is provided with an insertion opening, the second coupling arm 20 is partially arranged on the first coupling arm 10 through the insertion opening, the rest part extends to the outside of the installation housing 4, the abrasive belt 3 is sleeved on the output ends of the second coupling arm 20 and the motor for polishing a processing object, and the elastic restoring structure 40 can realize reciprocating movement crossing the assembly direction of the second coupling arm 20 through application of force or not, and of course, the reciprocating movement is preferably perpendicular to the assembly direction, thereby realizing detachable connection between the second coupling arm 20 and the first coupling arm 10.

As shown in fig. 3, the elastic restoring structure 40 is composed of a movable member, an elastic member 43 and a pressing member 44, wherein the movable member is disposed on the first connecting arm 10 and is preferably vertical, and the direction of the dismounting movement of the second connecting arm 20 is horizontal, and the movable member is disposed in a vertical direction and is located above the dismounting movement path of the second connecting arm 20.

The movable member is formed by combining a first movable section 41 and a second movable section 42 which are connected end to end, the widths of the first movable section 41 and the second movable section 42 on the horizontal section are different, the first movable section 41 is located above the second movable section 42 from the view of fig. 3, the first movable section 41 and the second movable section 42 are preferably coaxially arranged, and the diameter of the first movable section 41 is smaller than that of the second movable section 42.

The pressing piece 44 is located outside the first coupling arm 10 and protrudes to the outside of the mounting housing 4, and adopts a cover-shaped structure, a clamping ring body is coaxially and convexly provided inside the pressing piece, a clamping space 441 is formed inside the clamping ring body, the elastic piece 43 is arranged between the pressing piece 44 and the first coupling arm 10, one end of the first movable section 41 penetrates out of the first coupling arm 10 and is inserted into the clamping space 441 in the pressing piece 44, the second movable section 42 cannot penetrate out of the first coupling arm 10, the elastic piece 43 provides elasticity and limits the movable piece to a certain height, the elastic force of the elastic piece 43 can be overcome through external application of force to the movable piece, and the movable piece moves along the direction of the application force, namely, the pressing piece 44 is pressed downwards, and drives the movable piece to move downwards against the elastic force of the elastic piece 43, so that the height positions of the first movable section 41 and the second movable section 42 are changed.

As shown in fig. 4, one end of the second coupling arm 20 has a wheel body 21 that cooperates with the belt 30, the opposite end of the second coupling arm 20 has an opening extending inward for the movable member to penetrate, specifically, the opening is divided into a first opening section 22 and a second opening section 23 from the opposite end of the second coupling arm 20 to one end of the wheel body 21, the first opening section 23 is penetrated by the first movable section 41 and the second movable section 42, the first opening section 22 is penetrated by the first movable section 41, i.e., the width of the first opening section 22 is smaller than the width of the second opening section 23, and the second coupling arm 20 cannot be separated when the second movable section 42 is positioned in the second opening section 23.

As shown in fig. 3 and 5, the first coupling arm 10 is composed of a main base 11 and a support 12, the support 12 is used to cover the upper opening of the main base 11, after covering, a space for the second coupling arm 20 to insert and move the movable member is formed between the main base 11 and the support 12, and a guiding hole 101 is provided in the main base 11 near the insertion end, and the second movable section 42 is disposed in the guiding hole 101 and can move along the guiding hole 101, i.e. the size of the second movable section 42 is just matched with the aperture of the guiding hole 101, so that the movement space of the second movable section 42 is first provided and the linear movement is ensured.

In order to facilitate the arrangement of the elastic member 43, a raised truncated cone-shaped step 121 with a through hole is provided at the upper end surface of the support body 12, one end of the elastic member 43 is sleeved on the step 121, the first movable section 41 passes through the through hole in the step 121 to be connected with the pressing member 44 located above, and the second movable section 42 cannot pass through the through hole, i.e. cannot pass through the support body 12 upwards.

As shown in fig. 5, in order to facilitate the plugging and positioning of the second coupling arm 20, an elastic body 102 and a limiting block 103 are disposed in the concave space of the main seat 11, where the elastic body 102 provides a restoring elastic force for the limiting block 103, and a spring is adopted.

The stopper 103 is limited to a certain range of the main seat 11, for example, a hole is formed on the bottom surface of the main seat 11, which is in contact with the stopper 103, a protrusion is arranged at the bottom of the stopper 103 and is positioned in the hole, the protrusion can only move in the length direction of the hole, thus limiting the movement range of the stopper 103, the second connecting arm 20 contacts with the stopper 103 when being assembled to the first connecting arm 10, and the second connecting arm 20 pushes the stopper 103 until the second connecting arm cannot move continuously, so that the assembly is in place.

In order to facilitate the directional movement of the second coupling arm 20 in the first coupling arm 10, a pin 104 is further disposed vertically and substantially throughout the first coupling arm 10, the pin 104 is disposed between the movable member and the stopper 103, a space exists between the stopper 103 and the pin 104, the first opening section 22 can just pass through the pin 104 and move toward one end of the stopper 103, that is, the diameter of the pin 104 is consistent with the width of the first opening section 22, and the pin penetrates from above the support body 12 to the main body 11 for fixing.

As shown in fig. 6, the elastic member 43 is in an unstressed state, which pushes up the pressing member 44 to a position protruding out of the end cap 401, and the movable section one 41 completely penetrates into the support body 12 and is mostly located outside the support body 12, while the movable section two 42 is just located in the main seat 11, i.e. located on the insertion path of the coupling arm two 20, and the movable section two 42 is located in the opening section two 23, and the pin 104 is located in the opening section one 22, so that the coupling arm two 20 can be positioned and connected, and cannot be pulled out from the coupling arm one 10, because the opening section one 22 cannot pass through the movable section two 42.

As shown in fig. 7, the pressing member 44 is pressed against the elastic force of the elastic member 43 by an external force, so as to drive the movable section two 42 to be hidden in the guiding hole 101, and the movable section one 41 is located on the insertion path of the coupling arm two 20, i.e. located in the opening section two 23, and the opening of the coupling arm two 20 can pass through the movable section one 41 and be pulled out, and similarly, the method is also suitable for inserting and assembling the coupling arm two 20.

In fig. 8, an exploded structure of the second coupling arm 20, the first coupling arm 10 and the elastic restoring structure 40 is also provided, and the specification and structure of the second coupling arm 20 are not limited, but only some examples thereof are provided.

The illustrative examples, embodiments, and particular forms of the invention have been illustrated and described in detail in the drawings and the foregoing description, and are to be considered as illustrative and not restrictive. The description of particular features in one embodiment does not imply that those particular features must be limited to that one embodiment. Features of one embodiment may be used in combination with features of other embodiments, as will be appreciated by those of ordinary skill in the art, whether or not explicitly so described. The exemplary embodiments have been shown and described, and all changes and modifications that come within the spirit of the invention are desired to be protected.

Wherein reference numerals are described as follows:

motor housing 1

Handle 2

Foot 3

Mounting case 4

End cap 401

Main housing 402

First connecting arm 10

Main seat 11

Guide hole 101

Elastomer 102

Limiting block 103

Pin body 104

Support body 12

Positioning protrusion 121

Second connecting arm 20

Wheel body 21

Open section one 22

Second opening section 23

Abrasive belt 30

Elastic reset structure 40

Movable section one 41

Movable section two 42

Elastic member 43

A pressing member 44.

Claims

1. An electric belt sander capable of being quickly disassembled and assembled, comprising:

a driving part including a motor surrounded by a motor housing;

a mounting portion including a mounting housing disposed on the motor housing and accommodating an output end of the motor therein; the working unit includes:

the abrasive belt is arranged on the output end of the second connecting arm and the motor and is used for polishing the processing object; the first connecting arm is also provided with an elastic reset structure, the elastic reset structure can realize reciprocating movement crossing the assembly direction of the second connecting arm through the application of force, and the second connecting arm is detachably connected with the first connecting arm through the elastic reset structure;

the elastic reset structure comprises:

the elastic piece is arranged in the first connecting arm and is matched with the movable piece, the elastic piece provides elasticity and limits the movable piece to a certain height, the elastic piece can be overcome by externally applying force to the movable piece, and the movable piece can move along the direction of the applied force;

one end of the second connecting arm is provided with a wheel body matched with the abrasive belt, the opposite end of the second connecting arm is provided with an opening extending inwards, and the opening is penetrated by the movable piece;

the opening is sequentially divided into a first opening section and a second opening section from the opposite other end of the second connecting arm to one end of the wheel body, the second opening section can be penetrated by the first movable section and the second movable section, and the first opening section is penetrated by the first movable section only.

2. The quick detachable motorized belt sander as set forth in claim 1, wherein the elastic return structure further comprises a pressing member, wherein the pressing member is located outside the first connecting arm and protrudes outside the mounting housing, the elastic member is disposed between the pressing member and the first connecting arm, one end of the first movable section penetrates the first connecting arm and is connected with the pressing member, and the second movable section cannot penetrate the first connecting arm.

3. The quick detachable electric belt sander as set forth in claim 2, wherein the first connecting arm comprises a main base and a support, wherein the support is configured to cover an upper opening of the main base, and a space for the second connecting arm to insert and the movable member to move is formed between the main base and the support.

4. A quick detachable electric belt sander as set forth in claim 3, wherein a guide hole is provided in the main housing, and the second movable section is disposed in the guide hole and is movable along the guide hole.

5. The quick detachable electric belt sander as set forth in claim 4, wherein the main base is provided with an elastic body and a stopper, wherein the stopper is movable within a certain range of the main base, and wherein the second coupling arm is fitted to the coupling arm to be in contact with the stopper.

6. The motorized belt sander of claim 5, wherein the first attachment arm has a pin disposed therein, the pin being positioned between the movable member and the stopper, there being a gap between the stopper and the pin, and the first opening section being movable through the pin and toward one end of the stopper.

7. The quick detachable electric belt sander as set forth in claim 1, wherein one end of the motor housing is further connected in sequence with a handle and a foot.