CN111702668A

CN111702668A - Safety abrasive disc for handheld sander

Info

Publication number: CN111702668A
Application number: CN202010605811.XA
Authority: CN
Inventors: 於雪峰
Original assignee: 於雪峰
Current assignee: Tangshan Youqian Technology Co.,Ltd.
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-09-25
Anticipated expiration: 2040-06-29
Also published as: CN111702668B

Abstract

The invention discloses a safe abrasive disc for a handheld sander, which comprises a disc body, wherein the upper end of the disc body is connected with a rotating shaft in a penetrating and rotating mode, a self-locking box is fixed at the inner top of the disc body, the rotating shaft penetrates through the self-locking box, a plurality of rotating blades are fixed on the circumferential side wall of one section of the rotating shaft, which is positioned in the self-locking box, the outer wall of the self-locking box is fixed with a control box, a temperature control mechanism is arranged in the control box, and a heat dissipation box and a power supply box are fixed at the upper end of the disc body. Has the advantages that: the power supply in the power box independently supplies power to the electrorheological fluid, so that the power supply and outage of the electrorheological fluid are not directly related to the operation of the sander, the electrorheological fluid can not restrict the rotating blade when not powered on, the rotating shaft can idle and can not drive the rotating disc to rotate, and therefore even if the power switch of the sander is touched by mistake, the rotation of the disc body can not be caused, so that the safety accident caused by errors can be effectively avoided, and the safety performance of the sander is further improved.

Description

Safety abrasive disc for handheld sander

Technical Field

The invention relates to the technical field of sanding machines, in particular to a safe sanding disk for a handheld sanding machine.

Background

The sander is a device which is suitable for cleaning, unhairing, large-plane working, leveling and polishing the surfaces of machinery, building decoration, furniture paint and the like;

on the emery disc was applied to hand-held type grinder, be convenient for change and kind is various, present emery disc self function is comparatively simple, heat dissipation and protective capacities to self are relatively weak, and the overheated life that will seriously influence of sand dish, and the high temperature is polished and is aroused incident such as conflagration easily, consequently there is the potential safety hazard in current emery disc, present emery disc just begins high-speed rotation after grinder power starts simultaneously, in case the mistake of switch appears and touches and will arouse the incident easily, safety in utilization is lower, therefore need a safe emery disc for hand-held grinder urgently.

Disclosure of Invention

The invention aims to solve the problem of poor heat dissipation capability of a sand compact disc in the prior art, and provides a safe sand compact disc for a handheld sander.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a handheld grinder is with safe abrasive disc, includes the disk body, the upper end of disk body runs through to rotate and is connected with the pivot, the interior top of disk body is fixed with the self-locking case, the pivot runs through the self-locking case, the pivot is located one section circumference lateral wall of self-locking incasement portion and is fixed with a plurality of commentaries on classics leaves, the outer wall of self-locking case is fixed with the control box, the inside temperature control mechanism that is equipped with of control box, the upper end of disk body is fixed with heat dissipation case and power supply box, a plurality of and the exchange groove of the inside intercommunication of heat dissipation case are seted up at the interior top of disk body, the lateral wall of pivot is.

In foretell handheld for grinder safety abrasive disc, temperature control mechanism is including being fixed in the baffle on the control box inner wall, the interior top of control box is connected with the touch panel through reset spring, the bottom of touch panel is fixed with the connecting rod that runs through the baffle, the bottom of connecting rod is fixed with the push pedal with the sealed sliding connection of inner wall of control box.

In the safe abrasive disk for the handheld sander, electrorheological fluid is filled in the self-locking box, layered water and dichloromethane are filled in the disk body, and dichloroethane is filled in the control box.

Compared with the prior art, the invention has the advantages that:

1. in the invention, the electrorheological fluid is independently supplied with power by the power supply in the power supply box, so that the power supply and outage of the electrorheological fluid are not directly related to the operation of the sander, and the electrorheological fluid can not restrict the rotating blade when not electrified, so that the rotating shaft idles and can not drive the rotating disc to rotate, and the rotating disc can not rotate even if the power supply switch of the sander is touched by mistake, thereby effectively avoiding safety accidents caused by errors and further improving the safety performance of the sander;

2. in the invention, when a sander is normally processed, the temperature of the disc body is accumulated and raised in a short time during processing, so that dichloromethane at the bottom in the disc body absorbs heat and is quickly gasified, and enters an upper-layer aqueous solution in the form of bubbles, so that the heat is quickly released to the aqueous solution, the disc body is cooled, liquefied and falls back, the heat is conveyed, a large amount of heat generated in a short time can be quickly diffused and released to the outside, the surface temperature of the disc body is stably prolonged, and meanwhile, fire accidents caused by high temperature are avoided;

3. in the invention, when the sander is continuously processed, the surface temperature of the disc body is continuously raised within a certain time, so that the dichloromethane in the sander cannot be radiated in time, and further the dichloroethane in the control box is gasified by high temperature accumulated in a small range, so that the electrorheological fluid is cut off and liquefied, and further the disc body is not driven to rotate by the idling of the rotating shaft, thereby avoiding the continuous temperature rise of the disc body and effectively protecting the disc body;

4. according to the invention, after the electrorheological fluid is liquefied in a high-temperature environment, the rotating shaft idles to drive the pump blade to rotate, so that the rotating speed difference is generated between the pump blade and liquid in the disc body, and then the pump blade pumps liquid at the bottom continuously through rotation, so that high-temperature liquid at the bottom moves upwards quickly, the quick heat exchange is realized, the temperature at the bottom of the disc body is quickly reduced, and the electrorheological fluid is recovered to supply power and be solidified after the temperature of the disc body is reduced, so that the disc body can be recovered to work, the disc body can be automatically and quickly cooled and recovered to work, and long-.

Drawings

Fig. 1 is a schematic structural diagram of a safety sanding disc for a handheld sander according to the present invention;

FIG. 2 is a top view of a safety sanding disc for a hand-held sander according to the present invention;

FIG. 3 is a cross-sectional view of a self-locking box portion of a safety sanding disk for a hand-held sander according to the present invention;

fig. 4 is a schematic structural diagram of a control box portion in a safety sanding disk for a handheld sander according to the present invention.

In the figure: the device comprises a plate body 1, a rotating shaft 2, a self-locking box 3, a rotating blade 4, a control box 5, a partition plate 6, a return spring 7, a touch plate 8, a connecting rod 9, a push plate 10, a heat dissipation box 11, an exchange groove 12, a power supply box 13 and a pump blade 14.

Detailed Description

The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Examples

Referring to fig. 1-4, a safe abrasive disc for a handheld sander comprises a disc body 1, a rotating shaft 2 is rotatably connected to the upper end of the disc body 1 in a penetrating manner, a self-locking box 3 is fixed to the inner top of the disc body 1, the rotating shaft 2 penetrates through the self-locking box 3, the rotating shaft 2, the disc body 1 and the self-locking box 3 are rotatably connected in a sealing manner through waterproof bearings, a plurality of rotating blades 4 are fixed to a section of circumferential side wall of the rotating shaft 2 located inside the self-locking box 3, a control box 5 is fixed to the outer wall of the self-locking box 3, a temperature control mechanism is arranged inside the control box 5, a heat dissipation box 11 and a power supply box 13 are fixed to the upper end of the disc body 1, a plurality of exchange grooves 12 communicated with the interior of the heat dissipation box 11 are formed in the inner top of the disc body, pump blades 14, the liquid at the bottom of the tray body 1 is pushed to move upwards, so that the liquid in the tray body 1 is rapidly mixed.

Temperature control mechanism is including being fixed in baffle 6 on the 5 inner walls of control box, the interior top of control box 5 is connected with touch panel 8 through reset spring 7, the bottom of touch panel 8 is fixed with the connecting rod 9 that runs through baffle 6, the bottom of connecting rod 9 is fixed with the push pedal 10 with the sealed sliding connection of inner wall of control box 5, the inside packing of auto-lock case 3 has the electrorheological fluid, touch panel 8 offsets the contact with 6 upper ends of baffle under reset spring 7 elastic force, thereby make the inside power of power supply box 13 can realize the power supply to the electrorheological fluid, after

touch panel

8 and 6 separation of baffle, the power supply line disconnection of electrorheological fluid will stop the circular telegram.

The electrorheological fluid is viscous when not electrified, so that the rotating vane 4 cannot be restrained, the rotating shaft 2 cannot drive the disc body 1 to synchronously rotate, and after the electrorheological fluid is electrified, it will be solidified, so that the rotation of the rotating shaft 2 and the rotation of the disc body 1 are synchronously carried out, the disc body 1 can be sanded and polished, layered water and dichloromethane are filled in the disc body 1, the density of the dichloromethane is greater than that of the water, and the boiling point of the dichloromethane is lower than that of the water, so that the dichloromethane is sunk and is gasified firstly by heat, the water on the upper layer effectively cools the dichloromethane, thereby leading the dichloromethane to absorb heat rapidly and radiate heat outwards, improving the cooling efficiency, filling dichloroethane in the control box 5, leading the dichloroethane to have higher boiling point and bear certain high temperature, but the temperature is accumulated for a short time and then is processed and gasified, so that the control mechanism is started to cut off the power supply to the electrorheological fluid.

In the invention, when a sander is used for plate processing, the rotating shaft 2 is installed on the sander, then the power switch in the power box 13 is turned on to supply power to the electrorheological fluid in the self-locking box 3, so that the electrorheological fluid is electrified and fixed, the rotating shaft 2, the rotating blade 4, the solidified electrorheological fluid, the self-locking box 3 and the disc body 1 are integrated through solidification of the electrorheological fluid, under the state, the rotation of the rotating shaft 2 synchronously rotates the disc body 1, so that sanding processing is completed, meanwhile, the power switch in the power box 13 is not turned on, the electrorheological fluid is in a liquid state and cannot restrict the rotating blade 4, the rotation of the rotating shaft 2 cannot influence the rotation of the disc body 1, safety accidents caused by mistaken touch of the sander switch are effectively avoided, and the use risk of the sander is reduced;

when the disc body 1 normally works, the temperature of the bottom of the disc body 1 rises due to the sanding and polishing process, the dichloromethane in the disc body 1 is closer to the bottom of the disc body 1 due to the density of the dichloromethane being higher than that of water, so that the heat of the disc body 1 is absorbed by the dichloromethane in a large amount, the boiling point of the dichloromethane is lower, after receiving a large amount of heat in a short time, the dichloromethane at the bottom is gasified and enters the water in the form of bubbles and moves upwards, when the gaseous dichloromethane rises, the heat of the dichloromethane is continuously absorbed by the water at the upper layer, so that the dichloromethane is liquefied and falls, the dichloromethane is further cooled in the falling process until the dichloromethane returns to the bottom of the disc body 1 again, the heat at the bottom of the disc body 1 is absorbed again, the heat transfer is realized through the state conversion of the dichloromethane, and a large amount of heat emitted from the surface, the water absorbing heat enters the heat dissipation box 11, and then breaks away from the interior of the disc body 1, and dissipates heat to the external space in time, so that the long-time effective heat dissipation and cooling effect is kept, the temperature of the bottom of the disc body 1 in the processing process is not too high, the service life of the disc body 1 is prolonged, and dangerous situations such as fire in the sanding and polishing process are avoided;

when the disc body 1 is continuously sanded and polished to cause that heat is difficult to dissipate temporarily, the heat at the bottom of the disc body 1 is rapidly gathered in a large amount, so that the temperature at the bottom in the disc body 1 is extremely high, dichloroethane in the control box 5 receives enough heat to reach a boiling point, gasification is started to push the push plate 10 to move upwards, the reset spring 7 is further contracted to separate the contact plate 8 from the partition plate 6, a power supply in the power box 13 is disconnected from supplying power to the electrorheological fluid, the electrorheological fluid is liquefied, the rotating shaft 4 is not restrained any more, the rotating shaft 2 idles and cannot drive the disc body 1 to rotate, the disc body 1 is further prevented from continuously rotating at a high speed, large amount of heat generated by friction is further reduced, the rotating shaft 2 in idling enables the pump blades 14 and the disc body 1 to generate a rotating speed difference, and the pump blades 14 start to pump dichloromethane in the disc body, and then mix with the water on upper strata fast and enter into heat dissipation case 11 to reach the purpose of rapid mixing cooling, make the temperature of disk body 1 obtain quick reduction, avoid long-time shut down, and after bottom heat gived off fast, the inside temperature of disk body 1 will stabilize and get off, thereby make the electrorheological fluid get the electro-setting again, then resume the rotation of disk body 1, automatic recovery work.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a handheld safe abrasive disc for grinder, includes disk body (1), its characterized in that, the upper end of disk body (1) is run through to rotate and is connected with pivot (2), the interior top of disk body (1) is fixed with from lock case (3), pivot (2) run through from lock case (3), pivot (2) are located from lock case (3) inside one section circumference lateral wall and are fixed with a plurality of commentaries on classics leaf (4), the outer wall of lock case (3) is fixed with control box (5), the inside temperature control mechanism that is equipped with of control box (5), the upper end of disk body (1) is fixed with heat dissipation case (11) and power supply box (13), a plurality of and heat dissipation case (11) inside exchange groove (12) that communicate are seted up at the interior top of disk body, the lateral wall of pivot (2) is fixed with pump leaf (14).

2. The safety sanding disc for the handheld sander as set forth in claim 1, wherein the temperature control mechanism comprises a partition plate (6) fixed on the inner wall of the control box (5), the inner top of the control box (5) is connected with a touch plate (8) through a return spring (7), the bottom of the touch plate (8) is fixed with a connecting rod (9) penetrating through the partition plate (6), and the bottom of the connecting rod (9) is fixed with a push plate (10) in sliding connection with the inner wall of the control box (5) in a sealing manner.

3. A safety sanding disc for hand-held sanders according to claim 2 characterized in that the inside of the self-locking box (3) is filled with electrorheological fluid, the inside of the disc body (1) is filled with layered water and dichloromethane, and the inside of the control box (5) is filled with dichloroethane.