CN110549247A - hand-held type electric tool protection casing with dust collecting device - Google Patents

Abstract

The invention discloses a hand-held electric tool protective cover with a dust collecting device, which is characterized in that: the outer side wall 2-1 of the protective cover is detachably connected with an inner end face 3-8 of the dust storage device 3, the side wall 2 is provided with a dust outlet 2-4, the dust outlet 2-4 corresponds to a dust inlet 3-1 of the dust storage device 3 in position, a dust storage cavity 3-6 is arranged in the dust storage device 3, at least one face or one part of one face of the dust storage device 3 is made of breathable materials or is provided with an exhaust hole, and at least one face of the dust storage device 3 can be opened. The dust storage device arranged on the outer side wall of the protective cover has the characteristics of small occupied space, good dust collection effect, easiness in operation and the like, is favorable for reducing dust pollution of operators during work, and is beneficial to improving the quality of air around a factory.

Description

Hand-held type electric tool protection casing with dust collecting device

the technical field is as follows:

The invention relates to a hand-held electric tool accessory, in particular to a protective cover of hand-held electric tools such as an angle grinder, an electric circular saw and the like. In addition, the dust pollution area of the handheld electric tool can be reduced, dust generated by the handheld electric tool can be collected, and pollution damage of the dust to the environment can be reduced, so that the dust collector also relates to the field of environmental protection.

Technical background:

At present, various handheld electric (pneumatic) tools are more and more widely applied, for example, an angle grinder is taken as an example, the handheld electric (pneumatic) tools are small in structure and flexible to operate, can finish various works such as cutting, grinding, polishing and the like, and are widely used in various industries, for example, in a mechanical factory, a pincer worker, a milling worker, a numerical control worker and an assembly worker are provided with the angle grinder, the works such as deburring and angle grinding can be finished directly by the angle grinder, and the workload of positioning, clamping and processing a workpiece on a machine tool is reduced. However, these hand-held power tools also have some drawbacks and deficiencies, such as: the existing angle grinder can generate a large amount of dust during working, and the dust can fly out at a high speed in the tangential direction of an outlet of the protective cover when leaving the protective cover due to the high rotating speed (generally over 10000 revolutions) of the angle grinder, the flying distance of the dust can reach 5 meters or even more, the dust has serious pollution to the working environment, and the pollution area is very large.

Description of the drawings:

Fig. 1 is a schematic structural view of a protective cover of the prior art.

FIG. 2 is a schematic view of a protective cover with a speed reducer.

fig. 3 is a schematic view of the structure of the dust container.

Figure 4 is a cross-sectional view of the dust reservoir.

FIG. 5 is a front view of the speed reducer and the boot.

fig. 6 is a schematic structural view of the inner side wall of the shield cover provided with a recess.

fig. 7 is a structural diagram of the connecting line of the side wall of the protective cover and the upper cover plate, which is not in the same plane.

Fig. 8 is a schematic structural view showing that the connecting line between the side wall and the upper cover plate is not a sector.

Figure 9 is a top view of the dust reservoir.

FIG. 10 is a schematic view of the structure of the dust storage device with an angle of 180 degrees between the first side and the second side.

FIG. 11 is a schematic view of the structure of the side wall with the dust outlet tube and the hose.

fig. 12 is a schematic view of the structure of the dust box.

FIG. 13 is a schematic view of the structure of the side wall integrated with the dust container and detachably connected with the upper cover plate of the shield.

Fig. 14 is a schematic view of the structure of the hose passing through the angle grinder fixing tube.

FIG. 15 is a schematic view of a dust bin or bag removably secured to the surface of the angle grinder housing adjacent the rear portion and on the side of the angle grinder at which the angle grinder plate is located.

FIG. 16 is a view showing the positional relationship of the dust box on the surface of the housing of the angle grinder.

Fig. 17 is a schematic structural view of the dust storage box or the dust storage bag arranged on the surface of the tail part of the shell.

In the above drawings, 1 an upper cover plate of a protective cover, 1 a screw hole on the surface of the upper cover plate, 1 a fixed ring, 1 a movable ring, 2 a side wall of a protective cover, 2 a 1 outer side wall, 2 a 2 inner side wall, 2 a 21 inner side wall surface of a speed reducer, a rising end of a 2-211 speed reducer, a falling end of a 2-212 speed reducer, a recess on the surface of a 2-24 inner side wall, a dust outlet on the surface of a 2-4 inner side wall, 2-5 positioning pin holes, a 3 dust storage, 3-1 dust inlet, 3-2 positioning pins, a lower end surface of a 3-3 dust storage, a first side surface of a 3-4 dust storage, an outer end surface of a 3-5 dust storage, a 3-6 dust storage cavity, a 3-7 dust inlet baffle, a fixed end of a 3-71 baffle, and a movable end of a 3-72 baffle, 3-8 inner end surface of dust storage device, 3-9 water storage bottle, 3-11 side surface of dust storage device, 4 lower cover plate of protective cover, 5 dust outlet pipe, 5-1 dust baffle plate positioned in inner side wall, 5-2 movable baffle plate of dust outlet pipe, 6 dust storage box, 6-1 dust inlet pipe, 6-2 exhaust pipe, top of 6-3 dust storage box, 6-4 part of dust storage box side close to top, 6-5 bottom of dust storage box, 6-6 end surface of dust storage box, 7 air inlet pipe, 8 structure integrating dust storage device and side wall, 8-1 inner side wall integrating dust storage device and side wall, 8-2 dust inlet hole integrating dust storage device and side wall, 8-3 end surface integrating dust storage device and side wall, 8-4 fixing screw hole integrating dust storage device and side wall, 9 hoses, 10 angle grinders (not marked in the drawing), 10-1 angle grinder shell (motor shell), 10-2 fixed pipes which are positioned on the surface of the shell and are in the same direction with the angle grinding pieces, 10-3 angle grinding pieces, 10-4 angle grinder protective covers, 10-5 angle grinder shell tail parts, 10-6 angle grinder power supply wire inlets positioned on the tail parts of the shells, 10-7 angle grinder power supply wires, 10-8 angle grinder motor cooling air inlets, and included angles between a side surface I and a side surface II.

The specific implementation mode is as follows:

In this specification, the dust storage 3 is different from the dust storage box 6 and the dust storage bag in that: the dust storage device 3 can be detachably connected with the outer side wall 2-2 of the protective cover by adopting a hook, a nylon thread gluing, a threaded connection, a clamping connection and the like; the dust storage box 6 is not arranged (including fixed and detachable fixed) outside the outer side wall 2-2 and needs to be connected by a hose; dust bags are not capable of holding objects that can retain moisture.

Example one

As shown in fig. 2, fig. 2 is a schematic structural view of the dust storage 3 provided on the protective cover. The dust enters the dust storage device 3 through the dust outlet 2-4 on the surface of the inner side wall 2-2, and the structure of the dust storage device 3 is shown in fig. 3 and 4.

The outer side wall 2-1 of the protective cover is detachably connected with an inner end face 3-8 of the dust storage device 3, the side wall 2 is provided with a dust outlet 2-4, the dust outlet 2-4 corresponds to a dust inlet 3-1 of the dust storage device 3 in position so that dust can smoothly enter the dust storage device 3, a dust storage cavity 3-6 is arranged in the dust storage device 3, at least one face or one part of one face of the dust storage device 3 is made of breathable materials or is provided with an exhaust hole (the face can be omitted when a dust storage bag is arranged in the dust storage device 3), at least one face of the dust storage device 3 can be opened so as to conveniently take out the dust in the dust storage cavity 3-6 (the face can be omitted when the dust storage bag is arranged in the dust storage device 3).

The exhaust hole is provided with a filter screen.

Furthermore, a positioning pin or a hook 3-2 is arranged on an inner end surface 3-8 of the dust storage device 3 and matched with a positioning pin hole 2-5 of the side wall 2, so that the position of a dust inlet hole 3-1 of the dust storage device 3 is matched with the position of a dust outlet hole 2-4 of the protective cover.

Furthermore, the dust outlet 2-4 is detachably connected with a dust storage bag, at least one surface or one part of one surface of the dust storage bag is made of breathable materials or is provided with an exhaust hole, and the dust storage bag is detachably fixed in the dust storage device 3 or detachably fixed on the outer side wall 2-1.

When the dust storage bag can be detachably fixed in the dust storage device 3, the dust storage device (3) is arranged on the outer side wall (2-2), the dust storage device 3 is only a containing body (containing and fixing the dust storage bag) of the dust storage bag, the dust outlet 2-4 can be detachably connected with the dust storage bag, the dust storage device 3 is provided with at least one surface which can be opened (used for taking out the dust storage bag) or one or more surfaces which are omitted, when all the surfaces are omitted, the dust storage device 3 is a frame body, and the positioning pin or the hook 3-2 is arranged on the frame body at the moment.

when the dust storage bag is detachably fixed on the outer side wall 2-1, the dust storage bag is provided with an inner end surface 3-8 or/and a positioning pin 3-2 matched with a positioning pin hole 2-4 of the side wall 2, and the dust storage device 3 is omitted.

The locating device comprises a fixing device and a detachable fixing device, wherein the detachable connecting device and the detachable fixing device comprise a threaded connection and a clamping connection.

In the specification, the positioning pin or the hook 3-2 and the positioning pin hole 2-4 can be replaced, that is, the positioning pin or the hook 3-2 is arranged on the side wall 2, and the positioning pin hole 2-4 is arranged on the dust storage device 3 or the dust storage bag.

As shown in fig. 9, the included angle a between the first side face 3-4 and the second side face 3-11 is between 25 and 230 degrees, preferably 60 degrees, 90 degrees, 125 degrees, 170 degrees, 180 degrees and 190 degrees; the arc radius of the inner end surface 3-8 is between 35 and 165mm, wherein the preferred arc radius is 50mm, 55mm, 60mm, 65mm, 100mm, 110mm and 130 mm; the height of the dust container 3 is between 8 and 50mm, wherein 12mm, 21mm and 30mm are preferred.

Furthermore, a baffle plate 3-7 of the dust inlet 3-1 is provided with a fixed end 3-71 and a movable end 3-72, when the handheld electric tool works, the baffle plate 3-7 rotates around the fixed end 3-71 and the movable end 3-72 towards the dust storage cavity 3-6 under the action of wind force; in a normal state (when the hand-held electric tool does not work), the baffle 3-7 is restored to the position shown in fig. 3 by the self-elasticity to block the dust inlet 3-1 so as to prevent dust from flowing out of the dust storage 3, and the characteristic is also applicable to the dust storage box 6 and the dust storage bag.

further, as shown in fig. 10, the dust storage device 3 is provided with an air inlet pipe 7, the other end of the air inlet pipe 7 is connected with an outlet of the handheld electric tool motor cooling air, and the air discharged from the outlet of the handheld electric tool motor cooling air is moist. The moist cooling air enters the dust storage device 3, so that the dust can be formed into larger particles for convenient collection, and the temperature of the metal dust can be reduced to be below the Curie temperature as soon as possible to restore the magnetism. In order to form moist cooling air, in the embodiment, a water curtain and a water tank are arranged at the motor cooling air outlet of the handheld electric tool, the water tank can keep the water curtain moist, and the moist cooling air is formed after the air at the motor cooling air outlet passes through the water curtain.

furthermore, at least one surface or part of one surface of the lower end surface 3-3, the side surface 3-4, the outer end surface 3-5, the inner end surface 3-8 and the like of the dust storage device 3 is provided with a magnetic material, so that iron dust is attracted by magnetism and does not roll in the dust storage cavity 3-6 when an iron workpiece is polished, the dust storage effect is better, and the characteristic is also suitable for the dust storage box 6 and the dust storage bag.

The magnetic material is detachable, or the magnetic pole of the magnetic material is adjustable (the changed magnetic force is offset with the magnetic force of the magnet without changing the direction by changing the magnetic pole direction of part of the magnet, and the magnet does not have the magnetic force to the outside at the moment), or the magnetic material is an electromagnet. When the iron dust is taken out from the dust storage cavity 3-6, the magnet is removed or the magnetic pole direction of part of the magnet is adjusted to offset the magnetic force or cut off the power of the electromagnet, so that the disappearance of the magnetic force is realized, and the iron dust is convenient to take out.

Further, the dust outlet pipe 5 shown in fig. 11 has the functions of the positioning pin 3-2 or the positioning pin hole 2-5, that is: when the dust outlet hole 2-4 has a protrusion with respect to the surface of the outer side wall 2-1, the inner end surface 3-8 has a hole which fits the protrusion.

Further, as shown in fig. 4, the axial line of the dust inlet hole 3-1 is inclined to the normal direction of the position of the dust inlet hole 3-1 of the inner end surface 3-8, such a structure is favorable for dust to enter the dust storage device 3, and the included angle between the dust inlet hole 3-1 and the normal direction of the position of the dust inlet hole 3-1 of the inner end surface 3-8 is 0 to 90 degrees, preferably 10 degrees, 20 degrees, 30 degrees, 45 degrees, 60 degrees and 80 degrees. The dust outlet 2-4 shown in fig. 2 and the dust outlet pipe 5 shown in fig. 11 also have such features.

Further, as shown in fig. 11, the inner sidewall 2-2 is provided with a dust-blocking plate 5-1, and the dust-blocking plate 5-1 is a protrusion on the surface of the inner sidewall 2-2 at a position adjacent to the dust outlet 2-4 or the dust outlet pipe 5 relative to the surface of the inner sidewall 2-2, and the protrusion can be adjusted relative to the surface of the inner sidewall 2-2, so that the structure is more favorable for dust to enter the dust outlet 2-4 or the dust outlet pipe 5, especially for abrasion and diameter reduction of an existing polishing sheet or cutting sheet after a period of use, and almost all dust can enter the dust outlet 2-4 or the dust outlet pipe 5 by adjusting the protrusion of the dust-blocking plate 5-1. The dust guard 5-1 is provided with a fixing structure (such as a fixing screw) to prevent the dust guard 5-1 from protruding too high to touch a tool piece (such as a corner grinding piece).

The height of the dust guard 5-1 relative to the surface of the inner side wall 2-2 ranges from 0.3 to 6mm, wherein 0.5mm, 1mm, 1.5mm, 3mm and 4.2mm are preferred.

Further, the dust storage chamber 3-6 is provided with a moisture-retentive object comprising a fabric or/and a sponge.

Furthermore, the upper surface of the dust storage box 3 is provided with a water inlet, a water storage bottle 3-9 is arranged at the position of the water inlet, the water storage bottle 3-9 is made of rubber, and water can be dripped into the dust storage cavity 3-6 by manual extrusion. The soaked fabric or sponge is easier to stick dust, and the water storage bottle 3-9 drips into the dust storage cavity 3-6 in a controllable mode, so that objects capable of keeping moisture are prevented from being too much in moisture, and the objects flow out of the dust storage device 3 to cause rusting of iron workpieces.

Furthermore, the water storage bottle 3-9 can drip water to the fabric or sponge in the dust storage device 3, or can only spray water to the dust storage cavity 3-6 (at the moment, the fabric or sponge is not arranged in the dust storage cavity 3-6), the sprayed water is atomized, and the atomized water is favorable for forming particles with larger volume from dust, so that the particles are convenient to collect.

Compared with the connection with a tap water pipe, the water storage bottle 3-9 is arranged on the dust storage device 3, the operation is not restricted by the water pipe, and the water inflow can be controlled more flexibly, so that the operation is more convenient and simpler.

Furthermore, the dust outlet 2-4 is connected with a bent pipeline, the bent pipeline is connected with the dust storage device 3 or/and the dust storage bag, the kinetic energy of dust can be reduced by the bent pipeline, and the destructive power of the dust on the dust storage device 3 or/and the dust storage bag is reduced.

Example two

As shown in fig. 1, the inner side wall 2-2 of the shield of the prior art is smooth and is not provided with protrusions or recesses corresponding to the surface of the inner side wall 2-2, and the dust generated by grinding or cutting moves along the inner side wall 2-2 under the driving of the centrifugal force generated by the operation of the tool piece (e.g. angle grinder), because the rotating speed of the tool piece of the hand-held power tool of the prior art is very high, the generated centrifugal force is also very high, the dust moves along the inner side wall 2-2 of the shield at high speed under the action of the centrifugal force, the speed of the dust leaving the shield is still very high, the kinetic energy is very high, the flying distance of the dust is very long, and the pollution area is also very.

As shown in fig. 2: the surface of the inner side wall 2-2 of the protective cover is provided with the speed reducer 2-21, the speed reducer 2-21 is an object or a shape protruding out of the surface of the inner side wall 2-2, the inner side wall 2-2 of the speed reducer 2-21 is arranged, the traveling path of dust entering the protective cover is not smooth any more, and when the dust flies out of the protective cover (flies out from the left side of the front view shown in fig. 5), the speed of the dust is reduced compared with the protective cover without the speed reducer 3.

In operation, dust enters the protective cover (from the right side of the protective cover shown in fig. 5) under the driving of the tool piece (such as the angle grinding piece), the change of the traveling path of the dust passes through the ascending end 2-211 and the descending end 2-212 can reduce the moving speed and kinetic energy of the dust, and after the path is changed for many times, the speed and kinetic energy of the dust can be greatly reduced when the dust leaves the protective cover and enters the dust storage device 3.

As shown in FIG. 6, the inner side wall 2-2 is provided with a recess 2-24 on the surface, and the recess 2-24 can also reduce the kinetic energy and velocity of the dust, and the effect and effect are the same as those of the speed reducer 2-21.

The speed reducer 3 can be integrated with the protective cover or be two-body, and when the speed reducer is two-body, the speed reducer and the protective cover can be connected into a whole in a connecting mode. The purpose of the speed reducer 3 and the recess 2-24 is to make the inner side wall 2-2 of the shield not smooth but rough, which is reflected in a convex or concave shape or object (as shown in fig. 2, 5, 6) relative to the surface of the inner side wall 2-2 when the inner side wall 2-2 is connected to the upper cover plate 1 with a fixed radius of sector; when the connecting line between the inner sidewall 2-2 and the upper cover plate 1 does not have a fixed sector radius value, the roughness is expressed in that the arc radius of the inner sidewall 2-2 is changed, i.e. the arc radius value of the connecting line between the inner sidewall 2-2 and the upper cover plate 1 is 2 or more than 2 (as shown in fig. 8).

As shown in fig. 7, the shield is provided with a lower cover plate 4, the lower cover plate 4 is a protrusion or an inclination (including being parallel to the upper cover plate 1) of one end of the side wall 2 far from the upper cover plate 1 to the direction of the inner side wall 2-2, and the connecting line of the lower cover plate 4 and the side wall 2 is not in the same plane, so that the height of the inner side wall 2-2 is changed, the traveling route of the dust is changed along with the changed height, and the structure can also reduce the speed of the dust when the dust leaves the shield.

the connecting line of the side wall 2 and the upper cover plate 1 is not in a plane, and the traveling route of dust can be changed.

The dust with reduced speed and kinetic energy can not fly out far and only fall near the working place, and the pollution area can be reduced to a certain extent. When the dust storage device 3 is arranged on the outer side wall 2-1, the speed and kinetic energy of dust entering the dust storage device 3 can be greatly reduced, and the damage of the dust to the dust storage device 3 can be reduced.

The recess on the surface of the inner sidewall 2-2 in this embodiment is hole-shaped and is a blind hole, which is different from the dust outlet 2-4 (through hole) and the dust outlet pipe 5 (through hole) in the following embodiments.

The height from the highest point of the protrusion to the normal direction of the inner side wall 2-2 is between 1 and 15mm, wherein the preferred 2mm, 2.4mm, 3.5mm, 4.6mm, 5.1mm and 7.8mm, the depth from the lowest point of the recess to the normal direction of the inner side wall 2-2 is between 0.2 and 11mm, wherein the preferred 0.3mm, 1.1mm, 1.6mm, 3.1mm, 5.2mm and 8mm, the arc radius value of the connecting line of the side wall 2 and the upper cover plate 1 is between 25 and 165mm, and wherein the preferred 35mm, 52mm, 55mm, 110mm and 130 mm.

EXAMPLE III

As shown in fig. 11: the side wall 2 is provided with a dust outlet pipe 5, and the dust outlet pipe 5 is connected with a hose 9.

The dust outlet pipe 5 is connected with a hose 9, and comprises a dust outlet pipe 5 connecting hose 9 or a dust outlet pipe 5 connecting hose 9 and a hard pipe.

Further, the hose 9 is made of a breathable material.

The flexible pipe 9 is made of a breathable material, and comprises the flexible pipe 9 which is made of a breathable material or a breathable material partially, or the flexible pipe 9 and the hard pipe which are made of a breathable material or a breathable material partially.

The kinetic energy of the dust is gradually reduced in the process of passing through the bent hose 9, and the dust only falls below the outlet of the hose 9 and is not excessively scattered in the case of longer or/and bent hose 9 (the dust is accumulated in the hose due to overlong or over-bending). If a bottle is placed under the outlet of the hose 9, the dust will fall directly into the bottle. When the hose 9 is made of a breathable material, the effect is better.

The hose 9 and the air permeability thereof are more suitable for a tool with a small structure, such as a handheld electric tool, and can reduce the kinetic energy of dust more quickly.

When the hand-held electric tool is an angle grinder, the iron dust ground or cut by the hand-held electric tool has higher temperature and impact force, so the material of the hose 9 comprises metal or/and high-temperature-resistant rubber or/and high-temperature-resistant plastic (including plastic), and when the material of the hose 9 adopts the high-temperature-resistant rubber or/and the high-temperature-resistant plastic, the Shore hardness value of the part of the hose 9 adjacent to the outlet of the dust outlet pipe 5 is more than or equal to 60HD (preferably 83HD, 80HD, 77HD, 74HD, 70HD, 65 HD), so as to adapt to the impact of the iron dust just discharged from the protective cover.

When the hand-held electric tool is other hand-held electric tools except for an angle grinder, the material of the hose 9 comprises metal or/and rubber or/and plastic (including plastic); when the material of the hose 9 is rubber or/and plastic, the shore hardness value of the part of the hose 9 adjacent to the outlet of the dust outlet pipe 5 is greater than or equal to 42HD (preferably 70HD, 65HD, 60HD, 55HD, 50 HD).

The part of the hose 9 adjacent to the outlet of the dust outlet pipe 5 is the part of the hose 9 within 380mm from the outlet of the dust outlet pipe 5.

The hose 9 has an internal diameter of between 5 and 60mm, preferably 20mm, 22mm, 30mm, 35mm, 43mm, 49mm, 54 mm.

Further, fig. 12 is a schematic structural view of the dust storage box, when the hose 9 is connected to the dust storage box 6, the hose 9 is connected to a dust inlet pipe 6-1 of the dust storage box 6, each surface of the dust storage box 6 is closed (does not allow dust to permeate), the dust storage box 6 is provided with an exhaust pipe 6-2, the exhaust pipe 6-2 is provided with a filter screen, at least one surface of the dust storage box 6 is openable (for dumping dust), and when dust is dumped from the dust inlet pipe 6-1, the dust storage box 6 may not be provided with an openable surface.

When the hose 9 is connected with the dust storage bag, at least one surface or one part of one surface of the dust storage bag is made of breathable materials or is provided with an exhaust hole, and the exhaust hole is provided with a filter screen.

When the hose 9 is connected with the dust storage box 6 and the dust storage bag, the dust storage bag is detachably fixed in the dust storage box 6, the dust storage bag is detachably connected with the hose 9, at the moment, the dust storage box 6 is only a containing body (containing and fixing the dust storage bag) of the dust storage bag, at least one surface of the dust storage box 6 is openable (used for taking out the dust storage bag) or one or more surfaces are omitted, when all surfaces are omitted, the dust storage box 6 is only a frame body, when more than one surface of the dust storage box 6 is omitted, the exhaust pipe 6-2 is omitted, the dust inlet pipe 6-1 is used as a transition for connecting the hose 9 and the dust storage bag (the hose 9 is connected with the dust inlet pipe 6-1, the dust inlet pipe 6-1 is connected with the dust storage bag) and is arranged on the dust storage box 6, or the dust inlet pipe 6-1 is omitted; at least one surface or one part of one surface of the dust storage bag is made of breathable materials or is provided with an exhaust hole, and the exhaust hole is provided with a filter screen.

Of the above three schemes, the third scheme is the most preferable.

the locating device comprises a fixing device and a detachable fixing device, wherein the detachable connection device and the detachable fixing device comprise a screw fixing device and a clamping device.

Further, an object capable of keeping moisture is arranged in the dust storage box 6, and the object capable of keeping moisture comprises fabric or/and sponge.

Further, when the dust storage box 6 is far away from the handheld electric tool, the dust inlet pipe 6-1 is connected with a fan, so that dust discharged by the handheld electric tool can enter the dust storage box 6.

further, as shown in fig. 11, the dust outlet pipe 5 is provided with a movable baffle 5-2, the dust outlet pipe 5 and the movable baffle 5-2 can slide along the surface of the outer sidewall 2-1 to realize the adjustment of the position of the dust outlet pipe 5, the movable baffle 5-2 is adjacent to the inner sidewall 2-2 or the outer sidewall 2-1, so that the sliding of the dust outlet pipe 5 and the movable baffle 5-2 can block the penetration (the penetration between the inner sidewall 2-2 and the outer sidewall 2-1) of the sidewall 2 caused by the sliding.

Further, when the hose 9 is made of a non-breathable material, air mixed with dust in the dust outlet pipe 5 enters the dust inlet pipe 6-1 through the hose 9, water is filled in the dust storage box 6, the dust enters water in the dust storage box 6 through the dust inlet pipe 6-1, partial dust is dissolved in the water after the dust meets the water, the rolling spray is also beneficial to the dust in the air to enter the water, and the air is discharged through the exhaust pipe 6-2. The level of one end of the exhaust pipe 6-2 in the dust storage box 6 is higher than that of one end of the dust inlet pipe 6-1 in the dust storage box 6.

The features of the present embodiment are applicable to hand-held power tools and angle grinders therein.

Example four

When the hand-held electric tool is an angle grinder, as shown in fig. 14, the side wall 2 of the protective cover is provided with a dust outlet pipe 5, the dust outlet pipe 5 is connected with a hose 9, a fixed pipe 10-2 is arranged on one side of the surface of the angle grinder shell 10-1 where the angle grinder piece 10-3 is located, and the hose 9 passes through the fixed pipe 10-2. The arrangement can ensure that the hose 9 is not easily damaged by the angle abrasive sheet, an operator cannot be restrained by the hose during working, and the operation is easier.

The dust outlet pipe 5 is connected with a hose 9, and comprises a connecting hose 9 or a connecting hose 9 and a hard pipe.

The hose 9 is made of metal or/and high-temperature-resistant rubber or/and high-temperature-resistant plastic.

The hose 9 has an internal diameter of between 5 and 60mm, preferably 20mm, 22mm, 30mm, 35mm, 43mm, 49mm, 54 mm.

Further, the hose 9 is made of a breathable material.

The hose 9 is made of a breathable material, and the whole hose 9 or part of the hose is made of the breathable material; or the whole or part of the hose 9 and the rigid pipe are made of air-permeable materials.

Further, as shown in FIG. 15, the dust storage box 6 and/or the dust storage bag are/is provided on the surface of the corner grinder housing 10-1 near the tail portion 10-5 and on the side of the corner grinding sheet 10-3. The approach to the tail is specifically: the end portion 6-6 of the dust box 6, which is the end of the dust box 6 farthest from the angle grinder plate 10-3 (shown in fig. 16), is located in a range from 50mm higher than the surface of the tail portion 10-5 to 50mm lower than the surface of the tail portion 10-5 in the direction of the axial center line of the housing 10-1 (or the center line of the motor shaft).

When the dust storage box 6 is arranged on the surface of the shell 10-1 of the angle grinder, close to the tail part 10-5 and on one side of the angle grinding sheet 10-3, the hose 9 is connected with the dust inlet pipe 6-1 of the dust storage box 6, the surfaces of the dust storage box 6 are closed, the dust storage box 6 is provided with an exhaust pipe 6-2, and the exhaust pipe 6-2 is provided with a filter screen;

when the dust storage bag is arranged on the surface of the angle grinder shell 10-1, close to the tail part 10-5 and on the side where the angle grinder 10-3 is located, the hose 9 is connected with the dust storage bag, at least one surface or one part of one surface of the dust storage bag is made of breathable materials or is provided with an exhaust hole, and the exhaust hole is provided with a filter screen;

When the dust storage box 6 and the dust storage bag are arranged on the surface of the angle grinder shell 10-1, close to the tail part 10-5 and on the side where the angle grinding sheet 10-3 is located, the dust storage box 6 is arranged on the surface of the angle grinder shell 10-1, close to the tail part 10-5 and on the side where the angle grinding sheet 10-3 is located, the dust storage bag is detachably fixed in the dust storage box 6 and is detachably connected with the hose 9, at the moment, the dust storage box 6 is only a containing body of the dust storage bag, at least one surface of the dust storage box 6 is openable or one or more surfaces are omitted, and when all surfaces are omitted, the dust storage box 6 is only a frame body; when more than one surface of the dust storage box 6 is omitted, the exhaust pipe 6-2 is omitted, the dust inlet pipe 6-1 is arranged on the dust storage box 6 as the transition of the connection between the hose 9 and the dust storage bag, or the dust inlet pipe 6-1 is omitted; at least one surface or one part of one surface of the dust storage bag is made of breathable materials or is provided with an exhaust hole, and the exhaust hole is provided with a filter screen.

Of the above three schemes, the third scheme is the most preferable.

The device comprises a fixed part and a detachable part, and the detachable part comprises a screw fixed part and a clamping part;

Furthermore, a baffle plate 3-7 is arranged on a dust inlet pipe 6-1 or a dust storage bag of the dust storage box 6, the baffle plate 3-7 can rotate around a fixed end 3-71 towards the dust storage box 6 or the dust storage bag under the action of wind power, and the dust inlet pipe 6-1 or a dust inlet of the dust storage bag is blocked in a normal state (when the angle grinder does not work).

Further, as shown in fig. 17, the dust storage box 6 or/and the dust storage bag are/is arranged on the surface of the tail 10-5 of the shell 10-1.

When the dust storage box 6 is arranged on the surface of the tail 10-5 of the shell 10-1, the hose 9 is connected with the dust inlet pipe 6-1 of the dust storage box 6, each surface of the dust storage box 6 is closed, the dust storage box 6 is provided with the exhaust pipe 6-2, and the exhaust pipe 6-2 is provided with the filter screen.

When the dust storage bag is arranged on the surface of the tail part 10-5 of the shell 10-1, the hose 9 is connected with the dust storage bag, at least one surface or one part of one surface of the dust storage bag is made of breathable materials or is provided with an exhaust hole, and the exhaust hole is provided with a filter screen.

When the dust storage box 6 and the dust storage bag are arranged on the surface of the tail 10-5 of the shell 10-1, the dust storage box 6 is arranged on the surface of the tail 10-5 of the shell 10-1, the dust storage bag is detachably fixed in the dust storage box 6 and is detachably connected with the hose 9, at this time, the dust storage box 6 is only a containing body of the dust storage bag, at least one surface of the dust storage box 6 is openable or one or more surfaces are omitted, and when all the surfaces are omitted, the dust storage box 6 is only a frame body; when more than one surface of the dust storage box 6 is omitted, the exhaust pipe 6-2 is omitted, the dust inlet pipe 6-1 is arranged on the dust storage box 6 as the transition of the connection between the hose 9 and the dust storage bag, or the dust inlet pipe 6-1 is omitted; at least one surface or one part of one surface of the dust storage bag is made of breathable materials or is provided with an exhaust hole, and the exhaust hole is provided with a filter screen.

Of the above three schemes, the third scheme is the most preferable.

The locating device comprises a fixing device and a detachable fixing device, wherein the detachable fixing device and the detachable connecting device comprise a screw fixing device and a clamping device.

Furthermore, the connecting part of the dust storage box 6 and the tail part 10-5 is a part of the surface of the tail part 10-5 except the position of a motor cooling air inlet 10-8, a power wire inlet 10-6 or a power air inlet of the pneumatic angle grinder.

Furthermore, a baffle plate 3-7 is arranged on a dust inlet pipe 6-1 or a dust storage bag of the dust storage box 6 to prevent dust in the dust storage box 6 or the dust storage bag from flowing out, the baffle plate 3-7 can rotate around the fixed end 3-71 towards the dust storage box 6 or the dust storage bag under the action of wind power, and the dust inlet pipe 6-1 or a dust storage bag dust inlet is blocked in a normal state (when the angle grinder does not work).

Further, in fig. 14, the fixing tube 10-2 is fixed to the side of the surface of the angle grinder shell 10-1 where the angle grinder piece 103 is located in a linear manner, and if the fixing tube 10-2 is changed from the linear manner to the curve manner, kinetic energy of dust in the hose 9 can be reduced better, that is, the fixing tube 10-2 is arranged (including fixed and detachable fixed) on the surface of the angle grinder shell 10-1 in a curve manner and is on the same side as the angle grinder piece 10-3, so that the length and the bending amount of the hose 9 can be effectively increased, and reduction of kinetic energy of dust in the hose 9 is facilitated.

EXAMPLE five

Most of the existing protective covers are formed in one step by stamping, but the protective covers in the specification are difficult to process, for example, the protective covers are provided with speed reducers 2 to 21, recesses 2 to 24, dust collectors 3 and dust outlet pipes 5, and such a structure is difficult to realize by one-step stamping forming, so the protective covers are arranged into a two-body structure (as shown in fig. 13), specifically as follows:

The speed reducers 2-21 or/and the recesses 2-24 and the side wall 2 are of an integrated structure, and the integrated structure and the upper cover plate 1 are detachably connected together; or/and the side wall 2 and the dust storage 3 are integrated into a whole structure, at this time, the inner side wall 2-2 is an inner end surface 3-8 (marked as 8-1 in fig. 13) of the dust storage 3, and the integrated structure is detachably connected with the upper cover plate 1; or/and the dust outlet pipe 5 and the side wall 2 are integrated into a whole, and the integrated structure is detachably connected with the upper cover plate 1.

The integrated structure is a non-detachable structure, and the detachable connection mode comprises threaded connection and clamping connection.

Compared with the first embodiment in which the outer side wall 2-1 of the protective cover is detachably connected with the inner end surface 3-8 of the dust storage 3, the first embodiment in which the side wall 2 and the dust storage 3 are of an integral structure can omit the positioning pin 3-2 and the positioning pin hole 2-5, so that the positions of the dust outlet 2-4 and the dust inlet 3-1 can be ensured to correspond to each other, and the first embodiment is more economical and easier to operate.

In the description, the first, second and fifth main expressions are the hand-held electric tool protective cover provided with the dust collecting device in the claims, and the third, fourth and fifth main expressions are the hand-held electric tool protective cover second and the angle grinder provided with the dust collecting device in the claims. The technical features in this specification, unless otherwise specified, may be superimposed on each other in different embodiments, such as the magnetic material in the dust container 3 in the first embodiment, and also applied to the dust container 6 in the third embodiment; the features of the hand-held power tool of example three also apply to the angle grinder of example four.

Claims (10)

1. The utility model provides a hand-held type electric tool protection casing with dust collecting device, includes upper cover plate (1), lateral wall (2) and apron (4) down, upper cover plate (1) is fan-shaped, lateral wall (2) are connected with the convex limit of upper cover plate (1), inside wall (2-2) are convex and the circular arc radius is a fixed numerical value with the connecting wire of upper cover plate (1), inside wall (2-2) do not have for protruding or sunken (2-24) on inside wall (2-2) surface, characterized by: the outer side wall (2-1) of the protective cover is detachably connected with an inner end face (3-8) of the dust storage device (3), the side wall (2) is provided with a dust outlet (2-4), the dust outlet (2-4) corresponds to the position of a dust inlet (3-1) of the dust storage device (3), a dust storage cavity (3-6) is arranged in the dust storage device (3), at least one face or one part of one face of the dust storage device (3) is made of breathable materials or is provided with an exhaust hole, and at least one face of the dust storage device (3) can be opened;

The detachable connection comprises threaded connection and clamping connection;

The included angle (a) between the first side face (3-4) and the second side face (3-11) is 25-230 degrees; the arc radius of the inner end surface (3-8) is between 35 and 165 mm; the height of the dust storage device (3) is between 8 and 50 mm.

2. The hand held power tool guard with a dust collection device of claim 1, wherein: the inner side wall (2-2) is provided with a bulge or/and a depression (2-24) relative to the surface of the inner side wall (2-2);

Or/and the arc radius value of the connecting line of the inner side wall (2-2) and the upper cover plate (1) is 2 or more than 2;

Or/and the connecting lines of the side wall (2) and the lower cover plate (4) are not in the same plane;

or/and the connecting lines of the side wall (2) and the upper cover plate (1) are not in the same plane;

the depressions (2-24) on the surface of the inner side wall (2-2) are in a hole shape and are blind holes;

The height from the highest point of the protrusion to the normal direction of the inner side wall (2-2) is between 1 and 15mm, the depth from the lowest point of the recess (2-24) to the normal direction of the inner side wall (2-2) is between 0.2 and 11mm, and the value of the circular arc radius of a connecting line of the side wall (2) and the upper cover plate (1) is between 25 and 165 mm.

3. A hand held power tool guard provided with a dust collecting device according to claim 1 or/and claim 2, wherein: the side wall (2) and the dust storage device (3) are of an integral structure, the inner side wall (2-2) is an inner end face (3-8) of the dust storage device (3), and the integral structure is detachably connected with the upper cover plate (1);

Or/and the speed reducers (2-21) or/and the recesses (2-24) and the side wall (2) are of an integral structure which is detachably connected with the upper cover plate (1);

The integrated structure is a non-detachable structure, and the detachable connection mode comprises threaded connection and clamping connection.

4. The hand held power tool guard with a dust collection device of claim 1, wherein: the dust inlet (3-1) is provided with a baffle (3-7), the baffle (3-7) can rotate around the fixed end (3-71) towards the dust storage cavity (3-6) under the action of wind power, and the dust inlet (3-1) is blocked in a normal state.

5. the hand held power tool guard with a dust collection device of claim 1, wherein: the dust storage chamber (3-6) is provided with a moisture-retaining object which comprises a fabric or/and a sponge.

6. a hand held power tool guard provided with a dust collecting device according to claim 1 or/and claim 5, wherein: the dust storage box is characterized in that a water inlet is formed in the upper surface of the dust storage box (3), a water storage bottle (3-9) is arranged at the position of the water inlet, the water storage bottle (3-9) is made of rubber, and water can enter the dust storage cavity (3-6) in a foggy or water-drop mode through manual extrusion.

7. The hand held power tool guard with a dust collection device of claim 1, wherein: the inner end face (3-8) of the dust storage device (3) is provided with a positioning pin or a hook (3-2) which is matched with a positioning pin hole (2-5) of the side wall (2).

8. The hand held power tool guard with a dust collection device of claim 1, wherein: the dust outlet (2-4) is detachably connected with a dust storage bag, at least one surface or one part of one surface of the dust storage bag is made of breathable materials, and the dust storage bag is detachably fixed in the dust storage device (3) or detachably fixed on the outer side wall (2-1);

When the dust storage bag is detachably fixed in the dust storage device (3), the dust storage device (3) is arranged on the outer side wall (2-2), the dust storage device (3) is only a containing body of the dust storage bag, one surface of the dust storage device (3) can be opened or one or more surfaces can be omitted, when all surfaces are omitted, the dust storage device (3) is a frame body, and the positioning pin or the hook (3-2) is arranged on the frame body;

When the dust storage bag is detachably fixed on the outer side wall (2-1), the dust storage bag is provided with an inner end surface (3-8) or/and a positioning pin (3-2) matched with a positioning pin hole (2-4) of the side wall (2), and the dust storage device (3) is omitted;

The arrangement comprises connection and detachable connection, and the detachable connection and the detachable fixation comprise screw fixation and clamping connection;

The positioning pin or the hook (3-2) and the positioning pin hole (2-4) can be replaced, namely the positioning pin or the hook (3-2) is arranged on the side wall (2), and the positioning pin hole (2-4) is arranged on the dust storage device (3) or the dust storage bag.

9. The hand held power tool guard with a dust collection device of claim 1, wherein: the dust storage device (3) is provided with an air inlet pipe (7), the other end of the air inlet pipe (7) is connected with an outlet of cooling air of a motor of the handheld electric tool, and a water curtain and a water tank are arranged at the outlet of the cooling air of the motor of the handheld electric tool.

10. The hand held power tool guard with a dust collection device of claim 1, wherein: at least one surface or part of one surface of the dust storage device (3) is provided with a magnetic material, the magnetic material is detachable, or the magnetic force of the magnetic material can be counteracted, or the magnetic material is an electromagnet.