CN221416152U

CN221416152U - Hand-held sander

Info

Publication number: CN221416152U
Application number: CN202323307587.4U
Authority: CN
Inventors: 洪倍钦
Original assignee: Soartec Industrial Corp
Current assignee: Soartec Industrial Corp
Priority date: 2023-12-04
Filing date: 2023-12-04
Publication date: 2024-07-26
Anticipated expiration: 2033-12-04

Abstract

The utility model relates to a hand-held sander, comprising: a body and a working assembly. The body comprises a holding piece and a driving component which are connected, and the driving component comprises an output shaft; the working assembly comprises a base, a driving wheel, a driven wheel, a driving belt, a polishing piece, a rotating shaft and two clamping pieces, wherein the base is arranged on the body, the driving wheel is sleeved on the output shaft, the rotating shaft is rotatably positioned on the base and is penetrated and connected with the driven wheel, the driving belt winds the driving wheel and the driven wheel, the polishing piece comprises a hollow pipe part and a polishing part, the hollow pipe part is defined with an axial direction and a circumferential direction, the polishing part is arranged on the hollow pipe part along the circumferential direction, the two clamping pieces and the hollow pipe part are in the same rotation relationship, each clamping piece is provided with an assembling hole with a non-circular outline, the rotating shaft comprises an assembling section with an outer outline matched with the assembling hole, and the assembling section penetrates through the assembling holes of the two clamping pieces to drive the polishing piece to rotate. The utility model has simple structure, high speed and high accuracy.

Description

Hand-held sander

Technical Field

The present utility model relates to abrasive tools, and more particularly to a hand-held sander.

Background

The sander performs surface treatment such as sanding, polishing, and even cutting operations on objects through a high-speed rotating sanding member, such as sanding belt, abrasive cloth wheel, abrasive sheet …, and the like.

Currently, the more common sander is electrically driven, and the sander is directly driven to rotate by a motor, so that the overall size is larger and the weight is heavier. In addition, based on safety consideration and holding feeling, the motor is assembled at a position far from the holding position of the user, which causes the whole gravity center to deviate, and the holding hand is easily burdened, so that the motor cannot be used for a long time.

Accordingly, there is a need for a new and improved hand sander that addresses the above-described problems.

Disclosure of utility model

The main object of the present utility model is to provide a hand-held sander, which is driven by air, can effectively simplify the overall structure and weight, and can rapidly and positively actuate the sanding element to rotate through the driving wheel, the driven wheel and the driving belt.

To achieve the above object, the present utility model provides a hand-held grinder, comprising: a body and a working assembly. The body comprises a holding piece and a driving component driven by gas, one end of the holding piece is connected with an air inlet component, the other end of the holding piece is provided with the driving component, and the driving component comprises an output shaft; the working assembly comprises a base, a driving wheel, a driven wheel, a driving belt, a polishing piece, a rotating shaft and two clamping pieces, wherein the base is arranged on the body, the driving wheel is sleeved on the output shaft to form a same rotation relationship, the rotating shaft is rotatably positioned on the base and is penetrated and connected with the driven wheel to form a same rotation relationship, the driving belt is wound on the driving wheel and forms a same rotation relationship with the driven wheel, the polishing piece comprises a hollow pipe part and a polishing part, the hollow pipe part is defined with an axial direction and a circumferential direction, the polishing part is arranged on the hollow pipe part along the circumferential direction, the two clamping pieces are jointly clamped on the hollow pipe part in the axial direction and mutually block and interfere with the hollow pipe part in the circumferential direction, the two clamping pieces and the polishing piece form a same rotation relationship, each clamping piece is provided with an assembling hole with a non-circular outline, the rotating shaft comprises an assembling section with an outer outline matched with the assembling hole, and the assembling section penetrates the assembling hole of the two clamping pieces to drive the polishing piece to rotate synchronously.

Preferably, the working assembly further comprises a covering portion protruding from the base and defining an open working space, the polishing member is accommodated in the working space, and the covering portion extends along the circumferential direction and covers a portion of the polishing member in a direction perpendicular to the axial direction.

Preferably, the driven wheel and the polishing member are located at two opposite sides of the base, the working assembly further comprises at least one bearing and two clamping members, the at least one bearing is located at the base, the rotating shaft is inserted into the driven wheel through the at least one bearing, the outer side of the at least one bearing abuts against the base, the driven wheel abuts against the inner side of the at least one bearing along the axial direction, the two clamping members are in threaded connection with two ends of the rotating shaft, one clamping member abuts against the driven wheel along the axial direction, and the other clamping member abuts against one of the two clamping members which is far away from the base along the axial direction, so that the driven wheel, the rotating shaft and the polishing member are stably located at the base.

Preferably, the driven wheel is enclosed with a chamber, and the tightening member is accommodated in the chamber and presses against the driven wheel along the axial direction.

Preferably, the working assembly further comprises a stop pin, the stop pin member passes through a side of the rotating shaft away from the polishing member, and the stop pin is disposed in interference with the at least one bearing in the axial direction.

Preferably, the working assembly further comprises a cover detachably covering one side of the base to cover the driving wheel, the driven wheel and the driving belt.

Preferably, the inner wall surface of the hollow tube portion is convexly provided with a plurality of ribs which are arranged at intervals along the circumferential direction, each clamping piece further comprises a pressing part and a plurality of pushing parts which transversely protrude from the pressing part, the pressing part is pressed against the end surface of the hollow tube portion along the axial direction, and the pushing parts protrude into the hollow tube portion and mutually abut against the ribs along the circumferential direction.

Preferably, the rotating shaft is provided with a through hole perpendicular to the axial direction, and the through hole is used for inserting the plug-in.

Preferably, the output shaft and the rotating shaft are arranged in parallel at intervals along a first direction, and the holding member also extends along the first direction.

Preferably, the working assembly further comprises a covering portion protruding from the base and defining an open working space, the polishing member is accommodated in the working space, and the covering portion extends along the circumferential direction and covers a portion of the polishing member in a direction perpendicular to the axial direction; the working assembly further comprises a stop pin, the stop pin piece penetrates through one side, far away from the polishing piece, of the rotating shaft, and the stop pin is in interference arrangement with the at least one bearing in the axial direction; the working assembly further comprises a cover, wherein the cover is detachably covered on one side of the base to cover the driving wheel, the driven wheel and the driving belt; the inner wall surface of the hollow pipe part is convexly provided with a plurality of convex ribs which are arranged at intervals along the circumferential direction, each clamping piece further comprises a pressing part and a plurality of pushing parts which transversely protrude from the pressing part, the pressing part is pressed against the end surface of the hollow pipe part along the axial direction, and the plurality of pushing parts protrude into the hollow pipe part to mutually lean against the convex ribs along the circumferential direction; the rotating shaft is provided with a through hole in a penetrating way in the vertical direction, and the through hole is used for inserting the plug-in unit; the output shaft and the rotating shaft are arranged in parallel at intervals along a first direction, and the holding piece also extends along the first direction; the polishing part is a brush; each clamping piece is formed by integrally stamping a metal plate; the radial dimension of the driven wheel is larger than that of the driving wheel; the rotating shaft further comprises an expansion section, the radial dimension of the expansion section is larger than that of the assembling section, the expansion section is connected with the assembling section, and the expansion section is abutted against one of the two clamping pieces, which is closer to the base, in the axial direction.

The utility model has the advantages that:

The hand-held grinding machine provided by the utility model can effectively simplify the whole structure and weight through gas driving, and can rapidly and truly actuate the grinding piece to rotate through the driving wheel, the driven wheel and the transmission belt.

Drawings

Fig. 1 is a perspective view of an embodiment of the present utility model.

Fig. 2 is an exploded view of an embodiment of the present utility model.

Fig. 3 is an exploded view of another view of an embodiment of the present utility model.

FIG. 4 is a cross-sectional view of an embodiment of the present utility model.

Fig. 5 is a side view of fig. 1.

Detailed Description

The following examples are given to illustrate possible embodiments of the present utility model, but are not intended to limit the scope of the utility model, and the terms "a" and "an" as used herein are not intended to limit the number of "a" or "an" as desired, but rather the number of "a" or "an" as used herein is intended to cover all such modifications as may be desired.

Referring to fig. 1 to 5, there is shown an embodiment of the present utility model, a hand-held grinder, comprising: a body 1 and a working assembly 3.

The body 1 comprises a holding piece 21 and a driving component 22 driven by gas, one end of the holding piece 21 is connected with an air inlet component 23, the other end of the holding piece 21 is provided with the driving component 22, and the driving component 22 comprises an output shaft 221; the driving assembly 22 is driven by high-pressure gas entering through the air inlet assembly 23, and has the advantages of simple structure, light weight, clean power source, no pollution and the like.

The working assembly 3 comprises a base 41, a driving wheel 42, a driven wheel 43, a driving belt 45, a grinding member 5, a rotating shaft 6 and two clamping members 7, wherein the base 41 is arranged on the body 1, the driving wheel 42 is sleeved on the output shaft 221 to form a same rotation relationship, the rotating shaft 6 is rotatably positioned on the base 41 and penetrates through the driven wheel 43 to form a same rotation relationship, the driving belt 45 winds the driving wheel 42 and the driven wheel 43 to form a same rotation relationship, the grinding member 5 comprises a hollow pipe portion 51 and a grinding portion 52, the hollow pipe portion 51 is defined with an axial direction 511 and a circumferential direction 512, the grinding portion 52 is arranged on the hollow pipe portion 51 along the circumferential direction 512, the two clamping members 7 are jointly clamped on the hollow pipe portion 51 in the axial direction 511 and mutually blocked and interfered with the hollow pipe portion 51, the two clamping members 7 and the grinding member 5 are in a same rotation relationship, each clamping member 7 is provided with an assembling hole 71 with a non-circular outline, the rotating shaft 6 comprises an outer outline and the assembling hole 71 is matched with the two clamping members 61, and the assembling hole 71 is matched with the assembling hole 61 of the two clamping members 7.

In more detail, the output shaft 221 and the rotating shaft 6 are disposed in parallel along a first direction 9, and the grip member 21 also extends along the first direction 9, so that the force of the gripping operation is applied along the first direction 9 through the output shaft 221 and the rotating shaft 6, and the specific portion can be polished without slipping and shifting. The polishing member 5 is a grinding wheel, and the polishing portion 52 is a brush, and is capable of being deformed in accordance with the shape of an object to be polished. In addition, the radial dimension of the driven wheel 43 is larger than that of the driving wheel 42, so as to reduce the rotational speed and the lifting torque force, thereby facilitating the polishing operation; the transmission structure of the driven wheel 43 and the driving wheel 42 is used for fast calculating the speed ratio and the torque ratio, and precisely and positively transmitting the acting force to drive the polishing member 5 to rotate.

In more detail, the driven wheel 43 and the polishing member 5 are located at opposite sides of the base 41, the working assembly 3 further comprises at least one bearing 83 and two tightening members 84, the at least one bearing 83 is located at the base 41, the rotating shaft 6 is inserted into the driven wheel 43 through the at least one bearing 83, the outer side of the at least one bearing 83 abuts against the base 41, the driven wheel 43 abuts against the inner side of the at least one bearing 83 along the axial direction 511, and the driven wheel 43 and the rotating shaft 6 can smoothly rotate relative to the base 41. In addition, the two tightening members 84 are screwed to two ends of the rotating shaft 6, one of the tightening members 84 abuts against the driven wheel 43 along the axial direction 511, and the other tightening member 84 abuts against one of the two clamping members 7 far away from the base 41 along the axial direction 511, so that the driven wheel 43, the rotating shaft 6 and the polishing member 5 are stably positioned on the base 41. In this embodiment, each clamping member 7 is integrally stamped from a metal plate, which has the advantage of rapid, accurate and mass production.

The inner wall surface of the hollow tube 51 is provided with a plurality of ribs 513 arranged at intervals along the circumferential direction 512, each clamping member 7 further comprises a pressing portion 72 and a plurality of pushing portions 73 protruding transversely from the pressing portion 72, the pressing portion 72 is pressed against the end surface of the hollow tube 51 along the axial direction 511, the pushing portions 73 protrude into the hollow tube 51 and mutually abut against the ribs 513 along the circumferential direction 512, and the assembly mode is easy for rapid assembly and combination and light weight. In this embodiment, the driven wheel 43 encloses a chamber 44, the packing 84 is accommodated in the chamber 44 and presses against the driven wheel 43 along the axial direction 511, the driven wheel 43 can protect the packing 84 from being touched by surrounding elements, and the size can be effectively reduced along the axial direction 511, so that the whole volume is kept small.

The rotating shaft 6 further includes an expansion section 62, the radial dimension of the expansion section 62 is larger than the radial dimension of the assembling section 61, the expansion section 62 is connected with the assembling section 61, the expansion section 62 abuts against one of the two clamping members 7 closer to the base 41 in the axial direction 511, the expansion section 62 and the pressing member 84 farther from the base 41 jointly clamp the two clamping members 7, so that the polishing member 5 can maintain stable combination with the rotating shaft 6 during high-speed rotation and cannot be easily separated. In addition, the rotation shaft 6 is provided with a through hole 63 perpendicular to the axial direction 511, and the through hole 63 is used for inserting an insert (such as a screwdriver), so as to provide a supporting force for the rotation shaft 6 when the tightening member 84 is rotated, and effectively maintain the rotation shaft 6 fixed.

The working assembly 3 further comprises a stop pin 85, wherein the stop pin 85 is disposed on a side of the rotation shaft 6 away from the polishing member 5, the stop pin 85 is disposed in an interference manner with the at least one bearing 83 in the axial direction 511, which is a redundant mechanism designed in safety, and when the tightening member 84 is not released, the stop pin 85 can be blocked with the at least one bearing 83, so that the rotation shaft 6 cannot be separated from the base 41, thereby improving the use safety and protecting the personal safety of operators and bystanders.

The working assembly 3 further comprises a cover 86, wherein the cover 86 is detachably arranged on one side of the base 41 to cover the driving wheel 42, the driven wheel 43 and the driving belt 45, and the cover 86 can effectively isolate foreign objects to ensure smooth operation of the internal transmission mechanism.

The working assembly 3 further comprises a covering portion 81, wherein the covering portion 81 protrudes from the base 41 and defines an open working space 82, the polishing member 5 is accommodated in the working space 82, and the covering portion 81 extends along the circumferential direction 512 and covers a portion of the polishing member 5 perpendicular to the axial direction 511.

The foregoing is a description of the preferred embodiments of the present utility model and the technical principles applied thereto, and it will be apparent to those skilled in the art that any equivalent transformation, simple substitution, etc. based on the technical scheme of the present utility model can be made without departing from the spirit and scope of the present utility model.

Claims

1. A hand-held grinder, comprising:

The device comprises a body, a driving device and a control device, wherein the body comprises a holding piece and a driving component driven by gas, one end of the holding piece is connected with an air inlet component, the driving component is arranged at the other end of the holding piece, and the driving component comprises an output shaft; and

The working assembly comprises a base, a driving wheel, a driven wheel, a driving belt, a polishing piece, a rotating shaft and two clamping pieces, wherein the base is arranged on the body, the driving wheel is sleeved on the output shaft to form a same rotation relationship, the rotating shaft is rotatably positioned on the base and is penetrated and connected with the driven wheel to form a same rotation relationship, the driving belt is wound on the driving wheel and forms a same rotation relationship with the driven wheel, the polishing piece comprises a hollow pipe part and a polishing part, the hollow pipe part is defined with an axial direction and a circumferential direction, the polishing part is arranged on the hollow pipe part along the circumferential direction, the two clamping pieces clamp the hollow pipe part together in the axial direction and mutually block and interfere with the hollow pipe part in the circumferential direction, the two clamping pieces and the polishing piece form a same rotation relationship, each clamping piece is provided with a non-circular outline assembly hole, the rotating shaft comprises an assembly section with an outer outline matched with the assembly hole, and the assembly hole of the two clamping pieces is penetrated and arranged in the assembly section so as to drive the polishing piece to rotate synchronously.

2. The hand-held grinder of claim 1, wherein the working assembly further comprises a cover portion protruding from the base and defining an open working space, the grinding member being received in the working space, the cover portion extending in the circumferential direction and covering a portion of the grinding member perpendicular to the axial direction.

3. The hand-held grinder of claim 1, wherein the driven wheel and the grinding member are located at opposite sides of the base, the working assembly further comprises at least one bearing and two tightening members, the at least one bearing is located at the base, the rotating shaft is inserted into the driven wheel through the at least one bearing, the outer side of the at least one bearing abuts against the base, the driven wheel abuts against the inner side of the at least one bearing along the axial direction, the two tightening members are screwed to two ends of the rotating shaft, one of the tightening members abuts against the driven wheel along the axial direction, and the other tightening member abuts against one of the two clamping members farther from the base along the axial direction, so that the driven wheel, the rotating shaft and the grinding member are stably located at the base.

4. A hand-held grinder as defined in claim 3, wherein the driven wheel defines a chamber, and the tightening member is received in the chamber to press the driven wheel in the axial direction.

5. The hand-held grinder of claim 3, wherein the working assembly further comprises a stop pin, the stop pin passing through a side of the rotating shaft remote from the grinding member, the stop pin being disposed in interference with the at least one bearing in the axial direction.

6. The hand-held grinder of claim 1, wherein the working assembly further comprises a cover detachably covering one side of the base to cover the driving wheel, the driven wheel and the driving belt.

7. The polishing machine according to claim 1, wherein the inner wall surface of the hollow tube portion is provided with a plurality of ribs arranged at intervals along the circumferential direction, each of the clamping members further comprises a pressing portion and a plurality of pushing portions protruding laterally from the pressing portion, the pressing portion is pressed against the end surface of the hollow tube portion along the axial direction, and the plurality of pushing portions protrude into the hollow tube portion to mutually abut against the plurality of ribs in the circumferential direction.

8. The hand-held grinder of claim 1, wherein the rotating shaft has a through hole extending in a direction perpendicular to the shaft, the through hole being for insertion of the insert.

9. The hand-held grinder of any one of claims 1-8, wherein the output shaft and the rotatable shaft are disposed in spaced parallel relation along a first direction, the grip member also extending along the first direction.

10. The hand-held grinder of claim 4, wherein the working assembly further comprises a cover portion protruding from the base and defining an open working space, the grinding member being received in the working space, the cover portion extending in the circumferential direction and covering a portion of the grinding member perpendicular to the axial direction; the working assembly further comprises a stop pin, the stop pin piece penetrates through one side, far away from the polishing piece, of the rotating shaft, and the stop pin is in interference arrangement with the at least one bearing in the axial direction; the working assembly further comprises a cover, wherein the cover is detachably covered on one side of the base to cover the driving wheel, the driven wheel and the driving belt; the inner wall surface of the hollow pipe part is convexly provided with a plurality of convex ribs which are arranged at intervals along the circumferential direction, each clamping piece further comprises a pressing part and a plurality of pushing parts which transversely protrude from the pressing part, the pressing part is pressed against the end surface of the hollow pipe part along the axial direction, and the plurality of pushing parts protrude into the hollow pipe part to mutually lean against the convex ribs along the circumferential direction; the rotating shaft is provided with a through hole in a penetrating way in the vertical direction, and the through hole is used for inserting the plug-in unit; the output shaft and the rotating shaft are arranged in parallel at intervals along a first direction, and the holding piece also extends along the first direction; the polishing part is a brush; each clamping piece is formed by integrally stamping a metal plate; the radial dimension of the driven wheel is larger than that of the driving wheel; the rotating shaft further comprises an expansion section, the radial dimension of the expansion section is larger than that of the assembling section, the expansion section is connected with the assembling section, and the expansion section is abutted against one of the two clamping pieces, which is closer to the base, in the axial direction.