Electric hammer dust collector and electric hammer

Abstract

The utility model belongs to the technical field of impact tools, and particularly relates to an electric hammer dust collector which comprises an L-shaped installation plate and a negative pressure dust collection assembly, the negative pressure dust collection assembly comprises a dust collection head, a dust collection pipe, a negative pressure dust collector and a limiting rod, and the dust collection pipe comprises an outer pipe and an inner pipe axially connected in the outer pipe in a sliding mode. The dust collection head is connected with one end, extending out of the outer pipe, of the inner pipe through an elbow pipe fitting I, the part, extending out of the outer pipe, of the inner pipe is sleeved with a spring, the two ends of the spring are connected with the elbow pipe fitting I and the outer pipe respectively, and a channel allowing a drill bit to penetrate through is formed in the dust collection head and communicated with the elbow pipe fitting I; the outer pipe is fixedly mounted on the L-shaped mounting plate and is connected with an air inlet of the negative pressure dust collector through the elbow pipe fitting II; the end, close to the elbow pipe fitting I, of the limiting rod is fixed to the elbow pipe fitting I. The limiting rod slides in the direction parallel to the axis of the dust suction pipe. Negative pressure dust collection can be achieved during drilling, the dust collection head is located at the tip end of the electric hammer drill bit, the installation position of the drill bit is not affected, and the drill bit is convenient to replace.

Description

Technical Field

[0001] The utility model belongs to the technical field of impact tools, and particularly relates to a dust collector for an electric hammer and an electric hammer. Background Art

[0002] An electric hammer, also known as an impact electric drill, is a common device in the field of construction. Its working method is a combination of impact and rotation, which makes the drill bit gradually enter the wall or ground to break materials such as bricks, stones, and cement. During the construction process of using an electric hammer, a large amount of dust will be generated. Ordinary electric hammers cannot collect dust during use. Therefore, the dust naturally falls under the action of gravity, and the user needs to clean the dust after the drilling is completed, resulting in a large amount of work. Moreover, when using an electric hammer to drill holes in the ceiling, the dust falls from above the user's head and is likely to enter the user's eyes, nose, and mouth, causing harm to the user's health. Therefore, in order to avoid the harm of dust, people have designed electric hammers with dust collection functions. For example, Chinese Patent CN213259296U discloses a lithium battery double-purpose electric hammer with a vacuum cleaner. A rubber telescopic dust collection cover 21 is designed on the electric hammer main body 4, and the rubber telescopic dust collection cover 21 covers the drill bit 1. In this way, during the drilling process, the dust is restricted within the rubber telescopic dust collection cover 21, and the dust in the rubber telescopic dust collection cover 21 is sucked into the dust collection box 27 by a negative pressure motor 24 and a dust suction hose 22. However, for the electric hammer disclosed in the above patent, since the rubber telescopic dust collection cover 21 covers the drill bit 1, the replacement work of the electric hammer drill bit is hindered, which is not convenient for the user to replace the drill bit. Content of the Utility Model

[0003] The utility model aims to provide a dust collector for an electric hammer to solve the problem that the dust collection cover makes it inconvenient to replace the electric hammer drill bit.

[0004] To achieve the above purpose, the solution of the utility model is: a dust collector for an electric hammer, including an L-shaped mounting plate and a negative pressure dust suction assembly. The negative pressure dust suction assembly includes a dust suction head, a dust suction pipe, a negative pressure vacuum cleaner, and a limiting rod. The dust suction pipe includes an outer pipe and an inner pipe axially slidably connected inside the outer pipe. The dust suction head is connected to one end of the inner pipe extending out of the outer pipe through an elbow pipe fitting I. A spring is sleeved on the part of the inner pipe extending out of the outer pipe, and both ends of the spring are connected to the elbow pipe fitting I and the outer pipe respectively. A channel for the drill bit to penetrate is provided on the dust suction head, and the channel is communicated with the elbow pipe fitting I. The outer pipe is fixedly installed on the L-shaped mounting plate, and the end of the outer pipe away from the dust suction head is connected to the air inlet of the negative pressure vacuum cleaner through an elbow pipe fitting II. One end of the limiting rod close to the elbow pipe fitting I is fixed on the elbow pipe fitting I, and the limiting rod is slidably connected to the L-shaped mounting plate, and the sliding direction of the limiting rod is parallel to the axis of the dust suction pipe.

[0005] The working principle and beneficial effects of this solution are as follows: In this solution, the electric hammer dust collector is fixedly installed on the electric hammer through an L-shaped mounting plate, and a negative pressure vacuum cleaner is used to create a negative pressure in the dust suction pipe and the dust suction head, so as to collect the dust generated during the drilling process in the negative pressure vacuum cleaner to achieve dust collection. Moreover, in this solution, the dust suction head is located at the tip of the drill bit, and the design of the spring enables the dust suction head to be away from the tip of the drill bit, without affecting the installation position of the drill bit on the electric hammer, facilitating the user to replace the drill bit.

[0006] Not only that, in this solution, the limiting rod slides in a direction parallel to the axial direction of the dust suction pipe, thus avoiding the rotation of the dust suction head around the central axis of the dust suction pipe, ensuring that the dust suction head is coaxial with the drill bit, and further avoiding contact and wear between the dust suction head and the drill bit.

[0007] Optionally, a limiting ring is provided at one end of the limiting rod away from the elbow pipe fitting I. The limiting ring is slidably connected along the axial direction of the limiting rod, and a locking member is provided on the limiting ring for locking the limiting ring on the limiting rod.

[0008] In this solution, the spring is in a compressed state. Slide the inner sliding tube to adjust the position of the dust suction head, and then lock the limiting ring on the limiting rod through the locking member. The limiting ring abuts against the installation positions of the outer tube and the L-shaped mounting plate, thereby determining the position of the dust suction head. In this way, the position of the dust suction head can be adjusted according to the length of the drill bit, so that the dust suction head is located at the tip of the drill bit, ensuring the smooth progress of the dust suction work.

[0009] Optionally, the locking member is a locking screw, and a radial screw hole threadedly engaged with the locking screw is provided on the limiting ring.

[0010] In this solution, by rotating the locking screw to make the locking screw abut against or separate from the limiting rod, the locking or releasing of the limiting ring can be achieved.

[0011] Optionally, a proximity switch is fixedly installed on the L-shaped mounting plate. The proximity switch is used to monitor the position of the limiting ring, and the proximity switch is electrically connected to the negative pressure vacuum cleaner.

[0012] In this solution, after the proximity switch detects that the limiting ring has left below the proximity switch, the negative pressure vacuum cleaner automatically starts. When the limiting ring returns below the proximity switch, the negative pressure vacuum cleaner automatically shuts down. In this way, the drilling operation and dust collection can be carried out simultaneously, and there is no need to manually operate the negative pressure vacuum cleaner.

[0013] Optionally, a scale is fixedly connected to the L-shaped mounting plate. The scale is arranged in a direction parallel to the axial direction of the limiting rod.

[0014] In this solution, by observing the position of the end of the limiting rod away from the dust suction head or the limiting ring on the scale, the drilling depth can be mastered, avoiding over-drilling or under-drilling.

[0015] Optionally, the channel includes a first-order channel and a second-order channel. The inner diameter of the second-order channel is larger than that of the first-order channel. A plurality of radial air guide holes communicating with the second-order channel are formed in the suction head.

[0016] In this solution, after the drill bit passes through the first-order channel and the second-order channel, the gap between the first-order channel and the drill bit is small, and the gap between the second-order channel and the drill bit is large. Therefore, during the negative-pressure dust suction process, a negative pressure is formed in the second-order channel, and air mainly enters the second-order channel through the radial air guide holes, thereby taking away the dust in the second-order channel.

[0017] Optionally, the negative-pressure vacuum cleaner includes a housing, a vacuum cleaner motor, an air inlet pipe, and a dust collection cup. The vacuum cleaner motor is fixedly installed on the bottom wall of the housing, and the air outlet of the vacuum cleaner motor communicates with the internal space of the housing. A plurality of ventilation holes are formed in the peripheral wall of the housing; the dust collection cup is detachably connected to the bottom wall of the housing, the air inlet of the vacuum cleaner motor is located in the dust collection cup, and one end of the air inlet pipe penetrates through the peripheral wall of the housing and is connected to the elbow pipe fitting II, and the other end of the air inlet pipe penetrates through the bottom wall of the housing and enters the dust collection cup.

[0018] In this solution, when the vacuum cleaner motor works, the air in the dust collection cup is pumped into the housing, a negative pressure appears in the dust collection cup, and the negative pressure is transmitted to the suction head through the air inlet pipe and the dust suction pipe, thereby sucking the dust in the suction head channel into the dust collection cup for collection under negative pressure. Moreover, the dust collection cup in this solution can be removed, so that the dust in the cup can be poured out, and then the dust collection cup is reinstalled on the housing for use.

[0019] Optionally, an elbow pipe fitting III is connected to one end of the air inlet pipe located in the dust collection cup.

[0020] In this solution, the design of the elbow pipe fitting III changes the air outlet direction of the air inlet pipe from vertical to horizontal, thereby forming a cyclone in the dust collection cup, enabling the dust to rotate along the wall under the action of centrifugal force, reducing the amount of dust entering the filter element provided at the air inlet of the vacuum cleaner motor, and saving the filter element more.

[0021] Optionally, a limit sleeve is sleeved outside the limit rod, and the limit sleeve is fixedly arranged on the L-shaped mounting plate.

[0022] In this solution, the limit rod slides in the limit sleeve to ensure that the limit rod slides smoothly along the direction parallel to the axial direction of the dust suction pipe.

[0023] The present utility model further provides a hammer drill, which has any one of the above-mentioned hammer drill dust collectors, thereby realizing dust collection while drilling. Description of the Drawings

[0024] Figure 1 It is the front view when the hammer drill dust collector in the first embodiment of the present utility model is fixedly installed on the hammer drill;

[0025] Figure 2 is Figure 1 the top view of the electric hammer dust collector;

[0026] Figure 3 is the axial sectional view of the dust suction head in the first embodiment of the present utility model;

[0027] Figure 4 is Figure 1 the right view of the pipe buckle in the middle;

[0028] Figure 5 is the structural schematic diagram of the dust collection cup in the first embodiment of the present utility model;

[0029] Figure 6 is the front view when the electric hammer dust collector in the second embodiment of the utility model is fixedly installed on the electric hammer. Specific Embodiment

[0030] The following is a further detailed description through specific embodiments:

[0031] The marks in the attached drawings of the specification include: L-shaped mounting plate 1, dust suction head 2, channel 201, radial air guide hole 202, dust suction pipe 3, outer pipe 301, inner pipe 302, negative pressure vacuum cleaner 4, housing 401, ventilation hole 4011, vacuum cleaner motor 402, air inlet pipe 403, dust collection cup 404, elbow pipe III 405, limit rod 5, elbow pipe I 6, spring 7, pipe buckle 8, connecting screw 9, limit sleeve 10, limit ring 11, locking screw 12, scale 13, elbow pipe II 14, power switch 15, start switch 16, electric hammer 17, drill bit 18, proximity switch 19.

[0032] Embodiment 1

[0033] This embodiment is basically as Figure 1 and Figure 2 shown: An electric hammer dust collector includes an L-shaped mounting plate 1 and a negative pressure dust suction assembly. The L-shaped mounting plate 1 can be installed on the electric hammer 17 through bolts. The negative pressure dust suction assembly includes a dust suction head 2, a dust suction pipe 3, a negative pressure vacuum cleaner 4 and a limit rod 5. The dust suction pipe 3 includes an outer pipe 301 and an inner pipe 302 axially slidably connected inside the outer pipe 301. The dust suction head 2 is connected to one end of the inner pipe 302 extending out of the outer pipe 301 through an elbow pipe I 6, that is, one end of the elbow pipe I 6 is hermetically inserted into the dust suction head 2, and the other end of the elbow pipe I 6 is bonded to the inner pipe 302; a spring 7 is sleeved on the part of the inner pipe 302 extending out of the outer pipe 301, and both ends of the spring 7 are bonded to the elbow pipe I 6 and the outer pipe 301 respectively. Thus, when the inner pipe 302 axially slides relative to the outer pipe 301, the spring 7 expands and contracts. Combining Figure 3As shown, a channel 201 for the drill bit 18 to penetrate is provided on the dust suction head 2. The channel 201 is communicated with the elbow pipe fitting I 6. The channel 201 includes a first-order channel and a second-order channel. The inner diameter of the second-order channel is larger than that of the first-order channel. A plurality of radial air guide holes 202 communicated with the second-order channel are formed on the dust suction head 2. The outer pipe 301 is fixedly installed on the L-shaped mounting plate 1. Specifically, in this embodiment, the outer pipe 301 is installed on the L-shaped mounting plate 1 through two pipe fasteners 8. Combining Figure 4 As shown, the pipe fastener 8 is a conventional pipe fixator. In this way, the outer pipe 301 can be removed from the L-shaped mounting plate 1.

[0034] The limiting rod 5 is parallel to the axial direction of the dust suction pipe 3. One end of the limiting rod 5 close to the elbow pipe fitting I 6 is fixed on the elbow pipe fitting I 6. Specifically, a connecting screw 9 is threadedly connected to the elbow pipe fitting I 6. A hanging ring for the connecting screw 9 to penetrate is integrally formed at one end of the limiting rod 5 close to the elbow pipe fitting I 6. In this way, the hanging ring is hooked on the connecting screw 9, so as to fix one end of the limiting rod 5 close to the elbow pipe fitting I 6. A limiting sleeve 10 is sleeved outside the limiting rod 5, and the limiting sleeve 10 is adhered to the pipe fastener 8. A limiting ring 11 is slidably connected to the limiting rod 5 along the axial direction. A locking member for locking the limiting ring 11 on the limiting rod 5 is provided on the limiting ring 11. In this embodiment, the locking member is a locking screw 12. A radial screw hole for threaded cooperation with the locking screw 12 is formed on the limiting ring 11. By rotating the locking screw, the locking screw 12 is abutted against or separated from the limiting rod 5, so as to lock or release the limiting ring 11. A scale 13 is fixedly connected to the L-shaped mounting plate 1, and the scale 13 is arranged along the direction parallel to the axial direction of the limiting rod 5. Initially, the limiting ring 11 abuts against the right end of the limiting sleeve 10, and the limiting ring 11 corresponds to the zero scale line of the scale 13, and the spring 7 is in a compressed state.

[0035] Combining Figure 5As shown in the figure, the negative pressure vacuum cleaner 4 includes a housing 401, a vacuum cleaner motor 402, an air inlet pipe 403, and a dust collection cup 404. The vacuum cleaner motor 402 is fixedly installed on the bottom wall of the housing 401, and the air outlet of the vacuum cleaner motor 402 communicates with the internal space of the housing 401. A plurality of ventilation holes 4011 are provided on the peripheral wall of the housing 401. The dust collection cup 404 is a transparent plastic cup, and the dust collection cup 404 is threadedly connected to the bottom wall of the housing 401. The air inlet of the vacuum cleaner motor 402 is located in the dust collection cup 404, and a multi-stage filter element is provided at the air inlet of the vacuum cleaner motor 402; one end of the air inlet pipe 403 penetrates through the peripheral wall of the housing 401 and is hermetically inserted into the elbow pipe II 14, and the other end of the air inlet pipe 403 penetrates through the bottom wall of the housing 401 and enters the dust collection cup 404. An elbow pipe III 405 is connected to one end of the air inlet pipe 403 located in the dust collection cup 404, so that the airflow with dust forms a cyclone after entering the dust collection cup 404, and the dust adheres to the wall under the action of centrifugal force, reducing the amount of dust entering the multi-stage filter element. A power supply for powering the vacuum cleaner motor 402 is fixedly installed inside the housing 401. A power switch 15 and a start switch 16 are installed on the outer wall of the housing 401. When the power switch 15 is closed, the vacuum cleaner motor 402 is powered on. When the start switch 16 is closed, the vacuum cleaner motor 402 starts.

[0036] During actual use, adjust the position of the suction head 2 so that the suction head 2 is located at the tip of the drill bit 18, and try to make the tip of the drill bit 18 flush with the side wall of the suction head 2 away from the electric hammer 17. The specific adjustment method is as follows: Rotate the locking screw 12 so that the locking screw 12 no longer abuts against the limiting rod 5, so that the limiting ring 11 can slide freely along the limiting rod 5; then, push the suction head 2 to move. At the same time, the inner tube 302 slides axially along the outer tube 301, and the limiting rod 5 slides axially along the limiting sleeve 10; after the position of the suction head 2 is adjusted in place, slide the limiting ring 11 to a position where it abuts against the right end of the limiting sleeve 10, and rotate the locking screw 12 in the reverse direction so that the locking screw 12 abuts tightly against the limiting rod 5, locking the limiting ring 11 on the limiting rod 5, so as to keep the position of the suction head 2.

[0037] Then, the user closes the power switch 15 and then closes the start switch 16. The vacuum cleaner motor 402 starts, pumping the air in the dust collection cup 404 to the inside of the housing 401 and then flowing to the atmosphere through the ventilation holes 4011; a negative pressure is formed in the dust collection cup 404, and the negative pressure is transmitted to the passage 201 of the suction head 2 through the air inlet pipe 403 and the suction pipe 3. In this way, when drilling, the suction head 2 abuts against the wall / ceiling, the drill bit 18 drills into the wall / ceiling, and the generated dust is confined in the second-order passage. Under the action of negative pressure, air flows into the second-order passage through the radial air guide holes 202 and carries the dust into the elbow pipe I 6, and then enters the dust collection cup 404 through the suction pipe 3 and the air inlet pipe 403, and forms a cyclone in the dust collection cup 404, thereby collecting the dust in the dust collection cup 404.

[0038] During the drilling process, since the dust suction head 2 abuts against the wall / ceiling, as the electric hammer 17 advances, the inner tube 302 slides relative to the outer tube 301, the spring 7 shortens, and the L-shaped mounting plate 1, the outer tube 301, and the scale 13 all move towards the wall / ceiling direction. The user can master the drilling depth by observing the position of the limit ring 11 on the scale 13, so as to avoid over-drilling or under-drilling.

[0039] After the drilling is completed, the electric hammer 17 leaves the wall / ceiling. Under the action of the spring 7, the dust suction head 2 and the limit rod 5 move back to their original positions. Then, the start switch 16 is turned off, and the vacuum cleaner motor 402 stops working. When there is a large amount of dust accumulated in the dust collection cup 404, the dust collection cup 404 is rotated and removed, the dust in the cup is poured out, and then the dust collection cup 404 is re-threaded onto the housing 401. In addition, by separating the air inlet pipe 403 from the elbow pipe fitting II 14, the negative pressure vacuum cleaner 4 can be disassembled and used independently.

[0040] In summary, in this embodiment, the dust generated during the drilling process is sucked into the dust collection cup 404 by negative pressure for collection, which avoids the harm of dust to the user's health and also avoids the dust cleaning work. Moreover, the dust suction head 2 is located at the tip of the drill bit 18, without blocking the installation position of the drill bit 18 on the electric hammer 17, which is convenient for replacing the drill bit 18; and the position of the dust suction head 2 can be adjusted and can be adapted to drill bits 18 of different lengths, with good practicability.

[0041] Embodiment 2

[0042] The difference between this embodiment and Embodiment 1 is that: as Figure 6 shown, in this embodiment, a proximity switch 19 is fixedly installed on the L-shaped mounting plate 1. The proximity switch 19 is used to monitor the position of the limit ring 11, and the proximity switch 19 is electrically connected to the negative pressure vacuum cleaner 4; specifically, the proximity switch 19 in this embodiment is an inductive proximity switch, with the model number TL-W3MB2.

[0043] In this embodiment, after the power switch 15 is closed, the proximity switch 19 starts to work and monitors whether the limit ring 11 is below the proximity switch 19. Thus, when starting to drill, relative movement occurs between the limit ring 11 and the L-shaped mounting plate 1. The proximity switch 19 detects that the limit ring 11 has left, and the vacuum cleaner motor 402 automatically starts, and the dust suction work automatically begins; after the drilling is completed, the limit ring 11 resets and returns below the proximity switch 19 again, and the vacuum cleaner motor 402 automatically stops working. That is, in this embodiment, the drilling and dust suction work are carried out synchronously, without the user having to manually operate the dust suction work, which is more convenient to use.

[0044] The above are only embodiments of the present utility model, and common general knowledge such as specific structures and characteristics known in the solutions is not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present utility model, several modifications and improvements can be made, which should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the present utility model. The specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. An electric hammer dust collector, characterized in that: It comprises an L-shaped mounting plate and a negative pressure dust suction component, wherein the negative pressure dust suction component comprises a dust suction head, a dust suction pipe, a negative pressure dust cleaner and a limiting rod, wherein the dust suction pipe comprises an outer tube and an inner tube axially slidably connected inside the outer tube, wherein the dust suction head is connected to one end of the inner tube extending out of the outer tube through an elbow pipe fitting I, wherein the part of the inner tube extending out of the outer tube is sleeved with a spring, wherein the two ends of the spring are respectively connected to the elbow pipe fitting I and the outer tube, wherein a channel for a drill bit to pass through is provided on the dust suction head, and the channel is connected to the elbow pipe fitting I; wherein the outer tube is fixedly mounted on the L-shaped mounting plate, and the end of the outer tube away from the dust suction head is connected to the air inlet of the negative pressure dust cleaner through the elbow pipe fitting II; wherein the end of the limiting rod close to the elbow pipe fitting I is fixed on the elbow pipe fitting I, wherein the limiting rod is slidably connected to the L-shaped mounting plate, and the sliding direction of the limiting rod is parallel to the axial direction of the dust suction pipe.

2. The electric hammer dust collector according to claim 1, characterized in that: A limiting ring is provided at one end of the limiting rod away from the elbow pipe fitting I. The limiting ring is slidably connected along the axial direction of the limiting rod, and a locking piece for locking the limiting ring on the limiting rod is provided on the limiting ring.

3. The electric hammer dust collector according to claim 2, characterized in that: The locking member is a locking screw, and the limiting ring is provided with a radial screw hole which is threadably matched with the locking screw.

4. The electric hammer dust collector according to claim 2, characterized in that: A proximity switch is fixedly mounted on the L-shaped mounting plate. The proximity switch is used to monitor the position of the limit ring. The proximity switch is electrically connected to the negative pressure vacuum cleaner.

5. The electric hammer dust collector according to claim 1 or 2, characterized in that: The L-shaped mounting plate is fixedly connected with a scale, and the scale is arranged in a direction parallel to the axial direction of the limiting rod.

6. The electric hammer dust collector according to claim 1, characterized in that: The channel comprises a first-order channel and a second-order channel, the inner diameter of the second-order channel is larger than that of the first-order channel, and a plurality of radial air guide holes connected with the second-order channel are arranged on the dust collector head.

7. The electric hammer dust collector according to claim 1, characterized in that: The negative pressure vacuum cleaner includes a shell, a vacuum cleaner motor, an air inlet pipe and a dust cup. The vacuum cleaner motor is fixedly mounted on the bottom wall of the shell, and the air outlet of the vacuum cleaner motor is connected to the internal space of the shell. A plurality of ventilation holes are provided on the peripheral wall of the shell. The dust cup is detachably connected to the bottom wall of the shell, the air inlet of the vacuum cleaner motor is located in the dust cup, one end of the air inlet pipe penetrates the peripheral wall of the shell and is connected to the elbow pipe fitting II, and the other end of the air inlet pipe penetrates the bottom wall of the shell and enters the dust cup.

8. The electric hammer dust collector according to claim 7, characterized in that: One end of the air inlet pipe located in the dust cup is connected with an elbow pipe fitting III.

9. The electric hammer dust collector according to claim 1, characterized in that: The outer sleeve of the limiting rod is provided with a limiting sleeve, and the limiting sleeve is fixedly arranged on the L-shaped mounting plate.

10. An electric hammer, characterized in that: A dust collector for an electric hammer as claimed in any one of claims 1 to 9.

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