CN114800188A

CN114800188A - But quick assembly disassembly's electronic abrasive band machine

Info

Publication number: CN114800188A
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: 2022-07-29
Anticipated expiration: 2042-04-22
Also published as: CN114800188B

Abstract

The invention provides an electric abrasive belt machine capable of being quickly disassembled and assembled, which comprises: a motor surrounded by a motor housing; and a mounting case disposed on the motor case and accommodating an output end of the motor therein; and a working part having: one end of the first connecting arm is provided with an insertion opening; a second coupling arm, part of which is arranged on the first coupling arm through the insertion opening and the rest part of which extends to the outside of the mounting shell; the abrasive belt is arranged on the output end of the connecting arm II and the motor and is used for polishing the processing object; wherein, an elastic reset structure is arranged on the first connecting arm, and the elastic reset structure can realize the reciprocating motion crossed with the assembly direction of the second connecting arm by applying force or not. The invention can realize the integral pulling-out action of the two connecting arms of the belt wheel body only by pressing, realizes quick replacement, greatly improves the assembly efficiency and is convenient for the adjustment and use of the belt sander 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 abrasive belt machine capable of being quickly disassembled and assembled.

Background

The working part of the prior hand-held electric belt sander consists of an abrasive belt, a front wheel part and a rear wheel part, the rear wheel part is fixed on the sander 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 are conveniently dealt with.

The present disassembling structure, such as the belt sander with replaceable belt shown in patent document 1, includes a main body at least including a holding portion, a driving portion connected to the main body and providing a belt with a working power, and a mounting assembly, the mounting assembly comprises a main driving wheel connected with the driving part, a mounting seat connected with the main body or the driving part, and a detachable auxiliary driving wheel connected with the mounting seat and far away from the other end of the main driving wheel, and the relative distance between the main driving wheel and the detachable auxiliary driving wheel is defined as an installation section for installing the abrasive belt, a first assembly section and a second assembly section which are matched and form a fixed connection relationship are arranged at the connection end sides of the installation seat and the detachable auxiliary driving wheel, therefore, the abrasive belt with different lengths or widths can be ground by adjusting the length of the installation section or replacing the detachable auxiliary driving wheels with different specifications.

In combination with the drawings of patent document 1, it can be known that 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 wheel body needs to be changed correspondingly to adapt to the change, otherwise, the damage in the sanding process of the abrasive belt is easily caused; moreover, the detachable process is realized by detaching and screwing the fastening piece, and the replacement is still complicated and inconvenient.

Patent document 1CN 208945846U.

Disclosure of Invention

The invention provides the electric abrasive belt machine capable of being quickly assembled and disassembled in order to avoid the defects in the prior art, and the electric abrasive belt machine is more efficient and convenient.

The technical scheme adopted by the invention for solving the technical problems is as follows: a quick-detachable electric abrasive belt machine comprises: a driving part including a motor surrounded by a motor housing;

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

and a working part having:

the first connecting arm is arranged in the mounting shell, and one end of the first connecting arm is provided with an insertion opening;

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

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

the first connecting arm is also provided with an elastic resetting structure, the elastic resetting structure can realize reciprocating motion crossed with the assembling direction of the second connecting arm through force application or not, and the second connecting arm is detachably connected with the first connecting arm through the elastic resetting structure.

In several embodiments, the elastic return structure comprises:

the movable part is arranged on the first connecting arm in a way that the dismounting movement direction of the second connecting arm is crossed, 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 element is arranged in the first connecting arm and matched with the movable element, provides elastic force and limits the movable element to a certain height, and the elastic element can overcome the elastic force of the elastic element by applying force to the movable element from the outside and enables the movable element to move along the direction of the applied force.

In several embodiments, one end of the second coupling arm has a wheel body which is matched with the abrasive belt, and the other opposite end of the second coupling arm has an inwardly extending opening through which the movable member penetrates.

In a plurality of embodiments, 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 first opening section and the second opening section can be penetrated by the first moving section and the second moving section, and only the first opening section is penetrated by the first moving section.

In some embodiments, the elastic restoring structure further includes a pressing element located outside the first coupling arm and protruding to the outside of the mounting housing, the elastic element is disposed between the pressing element and the first coupling arm, one end of the first movable section penetrates through the first coupling arm and is connected to the pressing element, and the second movable section cannot penetrate through the first coupling arm.

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

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

In several embodiments, the main seat body is provided with an elastic body and a limiting block which are matched with each other, the limiting block can move within a certain range of the main seat body, and the second connecting arm is assembled to the first connecting arm and is contacted with the limiting block.

In a plurality of embodiments, a pin body is arranged in the first connecting arm, the pin body is positioned between the movable member and the limit block, a space is formed between the limit block and the pin body, and the first opening section can pass through the pin body and move towards one end of the limit block.

In several embodiments, a handle and a foot are sequentially connected to one end of the motor housing.

The elastic reset structure is adopted, the integral disassembling and pulling action of the two connecting arm parts of the belt wheel body can be realized only by pressing, the quick disassembling and assembling of the two connecting arm parts are realized, the quick replacing is realized, the assembling efficiency is greatly improved, and the adjustment and the use of the belt sander under different working conditions are facilitated.

Drawings

The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not to be considered limiting of the scope of the present disclosure.

FIG. 1 schematically illustrates an overall structure of an electric belt sander according to an embodiment;

FIG. 2 schematically illustrates a portion of the explosive structure of FIG. 1;

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

FIG. 4 schematically illustrates the structure of the second link arm of FIG. 3;

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

FIG. 6 schematically illustrates the structure of FIG. 3 in a lock-fit condition;

FIG. 7 schematically illustrates the structure of FIG. 3 in a loose fit;

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

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.

Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of the present invention.

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

For example, expressions such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "relative", "front-back-left-right" and the like indicate relative or absolute arrangements, and indicate not only such arrangements in a strict sense but also a state of being relatively displaced with a tolerance or an angle or a distance to the extent that the same function can be obtained.

Referring to fig. 1-2, the electric belt sander provided by the invention at least comprises a driving part, a mounting 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 in the motor shell 1 in a partially extending way, and the electric belt sander is matched with a power supply for use.

The mounting portion is formed by a mounting housing 4, the mounting housing 4 is formed by a main housing 402 and a detachable end cover 401, fig. 2 shows the structure that the end cover 401 is in an open state, so that an accommodating space is formed inside, after the main housing 402 is connected to the motor housing 1, an output shaft end of a motor inside the mounting housing 4 is located, and therefore, after the working portion is assembled, a sanding belt can be driven to perform sanding operation.

Referring to the structure of fig. 1-5, the working portion is composed of a first coupling arm 10, a second coupling arm 20, an abrasive belt 30 and an elastic restoring structure 40, the first coupling arm 10 is fixedly installed in the installation housing 4, and one end of the first coupling arm has an insertion opening, the second coupling arm 20 is partially arranged on the first coupling arm 10 through the insertion opening, and the rest extends to the outside of the installation housing 4, the abrasive belt 3 is sleeved on the second coupling arm 20 and the output end of the motor for polishing the processing object, the elastic restoring structure 40 can realize the reciprocating motion crossing the assembling direction of the second coupling arm 20 by applying force or not, of course, the reciprocating motion perpendicular to the assembling direction is preferable, thereby realizing the 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 element, an elastic element 43 and a pressing element 44, the movable element is arranged on the first connecting arm 10 and is preferably vertical, the movable element intersects with the dismounting movement direction of the second connecting arm 20, the dismounting movement direction of the second connecting arm 20 is horizontal, and the movable element is arranged vertically and is positioned on the dismounting movement path of the second connecting arm 20.

The movable part 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 positioned above the second movable section 42 in the view angle 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 element 44 is located outside the first coupling arm 10 and protrudes outside the mounting housing 4, and is of a cover-shaped structure, and has a snap ring body coaxially and protruding inside the coupling arm 10, a snap space 441 is formed inside the snap ring body, the elastic element 43 is disposed between the pressing element 44 and the first coupling arm 10, one end of the first moving section 41 passes through the first coupling arm 10 and is inserted into the snap space 441 in the pressing element 44, and the second moving section 42 cannot pass through the first coupling arm 10, the elastic element 43 provides elastic force and limits the movable element at a certain height, the elastic force of the elastic element 43 can be overcome by applying force to the movable element through the outside, and the movable element moves along the direction of the applied force, that is, the pressing element 44 is pressed downward, and drives the movable element to move downward against the elastic force of the elastic element 43, so that the height positions of the first moving section 41 and the second moving section 42 are changed.

As shown in fig. 4, one end of the second connecting arm 20 has a wheel body 21 matched with the sanding belt 30, the opposite end of the second connecting arm 20 has an opening extending inward for the movable member to pass through, specifically, the opening is sequentially divided into a first opening section 22 and a second opening section 23 from the opposite end of the second connecting arm 20 to one end of the wheel body 21, the first opening section 23 can be passed through by the first movable section 41 and the second movable section 42, the first opening section 22 is only passed through by the first movable section 41, that is, the width of the first opening section 22 is smaller than that of the second opening section 23, and when the second movable section 42 is located in the second opening section 23, the second connecting arm 20 cannot be separated.

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

In order to facilitate the arrangement of the elastic element 43, a raised truncated cone-shaped step 121 with a through hole is disposed on the upper end surface of the support body 12, one end of the elastic element 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 element 44 located above, and the second movable section 42 cannot pass through the through hole, i.e., cannot upwardly pass through the support body 12.

As shown in fig. 5, in order to facilitate the insertion and positioning of the second connecting arm 20, an elastic body 102 and a stopper 103 are disposed in the concave space of the main seat 11, and the elastic body 102 provides a restoring elastic force for the stopper 103, and a spring is used here.

The limit block 103 is limited to move within a certain range of the main seat body 11, for example, a hole with a certain length is formed on the bottom surface of the main seat body 11 contacting with the limit block 103, a protrusion is arranged at the bottom of the limit block 103 and is located in the hole, the protrusion can only move within the length direction of the hole, thereby limiting the movement range of the limit block 103, the second coupling arm 20 contacts with the limit block 103 when being assembled to the first coupling arm 10, and when the second coupling arm 20 pushes the limit block 103 to be unable to move continuously, it indicates that the assembly is in place.

In addition, in order to facilitate the directional movement of the second connecting arm 20 in the first connecting arm 10, a pin body 104 is vertically and generally arranged in the first connecting arm 10 in a penetrating manner, the pin body 104 is located between the movable member and the limit block 103, a distance exists between the limit block 103 and the pin body 104, and the first opening section 22 can just pass through the pin body 104 and move towards one end of the limit block 103, i.e. the diameter of the pin body 104 is consistent with the width of the first opening section 22, and the first opening section 22 penetrates into the main base body 11 from above the support body 12 to be fixed.

As shown in fig. 6, the elastic element 43 is in an unstressed state, and it pushes up the pressing element 44 to a position protruding to the outside of the end cap 401, and the first movable section 41 at this time completely penetrates into the support body 12 and is mostly located outside the support body 12, and the second movable section 42 is located just inside the main body 11, that is, on the insertion path of the second connecting arm 20, and the second movable section 42 is located inside the second opening section 23, and the pin 104 is located inside the first opening section 22, because the first opening section 22 cannot penetrate through the second movable section 42, the second connecting arm 20 is connected in a positioning manner, and cannot be pulled out from the first connecting arm 10.

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

In fig. 8, an exploded structure of the coupling arm two 20, the coupling arm one 10 and the elastic restoring structure 40 with partial specifications is also provided, and it should be noted that the specifications and the structures of the coupling arm two 20 are not limited, and are only partial examples thereof.

The present examples, illustrated embodiments and specific forms of the invention have been shown and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character. The description of a particular feature in one embodiment does not imply that those particular feature must be limited to that one embodiment. Features of one embodiment may be used in combination with features of other embodiments, as would be understood by one of ordinary skill in the art, whether or not explicitly so stated. 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 the reference numbers are as follows:

motor housing 1

Handle 2

Foot 3

Mounting housing 4

End cap 401

Main housing 402

Connecting arm one 10

Main seat body 11

Guide hole 101

Elastic body 102

Stopper 103

Pin body 104

Support body 12

Positioning protrusion 121

Connecting arm two 20

Wheel body 21

Opening segment one 22

Opening section two 23

Abrasive belt 30

Elastic reset structure 40

First movable section 41

Second movable section 42

Elastic member 43

A pressing member 44.

Claims

1. A quick-detachable electric abrasive belt machine comprises:

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

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

a working part having:

the first connecting arm is arranged in the mounting shell, and one end of the first connecting arm is provided with an inserting opening;

2. The quick disconnect electric belt sander as set forth in claim 1, wherein said resilient return structure comprises:

3. The electric belt sander capable of being disassembled and assembled quickly as claimed in claim 2, wherein one end of the second connecting arm has a wheel body matched with the sanding belt, and the other opposite end of the second connecting arm has an inwardly extending opening for the movable member to penetrate.

4. The electric belt sander capable of being disassembled and assembled quickly as claimed in claim 3, wherein 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 first opening section and the second opening section can be passed through by the first moving section and the second moving section, and only the first moving section can be passed through by the first opening section.

5. The electric belt sander capable of being disassembled and assembled quickly as claimed in claim 4, wherein the elastic reset structure further comprises a pressing member, the pressing member is located outside the first coupling arm and protrudes outside the mounting housing, the elastic member is disposed between the pressing member and the first coupling arm, one end of the first movable section penetrates through the first coupling arm and is connected with the pressing member, and the second movable section cannot penetrate through the first coupling arm.

6. The rapidly detachable and attachable electric belt sander as claimed in claim 5, wherein the first coupling arm comprises a main seat and a support seat, the support seat is used to cover the upper opening of the main seat, and a space for the second coupling arm to insert and move the movable member is formed between the main seat and the support seat.

7. The electric belt sander capable of being disassembled and assembled quickly as claimed in claim 6, wherein a guide hole is formed in the main seat body, and the second movable section is disposed in the guide hole and can move along the guide hole.

8. The electric belt sander capable of being disassembled and assembled quickly as claimed in claim 6, wherein the main seat body is provided with an elastic body and a limiting block which are matched, the limiting block can move within a certain range of the main seat body, and the second connecting arm is assembled to the first connecting arm and contacts with the limiting block.

9. The rapidly detachable and attachable electric belt sander as set forth in claim 8, wherein a pin is disposed in the first coupling arm, the pin is located between the movable member and the stopper, there is a gap between the stopper and the pin, and the first opening section can pass through the pin and move toward one end of the stopper.

10. The rapidly detachable and attachable electric belt sander as set forth in claim 1, wherein a handle and a foot are further connected to one end of the motor housing in sequence.