CN114701074A - A flat drilling device - Google Patents

Abstract

The invention relates to a flat drilling device, which is mounted in the auxiliary handle of an electric hammer, and comprises a power output gear arranged on the outer edge of the front end of the main chuck of the electric hammer, and a power transfer component connected with the power output gear, which transfers the power to A fixing component for fixing by connecting the component, a drilling execution component installed at the front end of the power conversion component, and an automatic feeding component installed in the power conversion component and connected with the drilling execution component. Each set of components is connected to each other to form positioning, and supports each other in function. The two functions are improved under the simplified structure. The present invention does not change the internal structure of the electric hammer, so the original impact performance is not affected, and the function of flat drilling Each component can be loaded and unloaded as required and carried with the hammer itself, which is very convenient when needed, and the structures that interact with each other are also mature structures, so the structure is stable, especially when drilling tiles at high positions. No need to carry Two power tools.

Description

A flat drilling device

technical field

The invention belongs to the technical field of electric hammers in electric tools, and particularly relates to a flat drilling device installed in the electric hammer.

Background technique

Electric hammer is a commonly used hand-held power tool in the field of decoration. It can output reciprocating impact (impact drill) while outputting torque (flat drill). In practical applications, it is best to switch between output torque and output impact, such as To drill holes on the tiles on the bathroom wall, a flat drill is required to drill through the tiles first, and then drill to the required hole depth to avoid direct impact to break the tiles. In order to enable users to switch the required working mode according to their needs, some electric hammers There is a more complicated switching mechanism, which not only has poor stability, but also is more troublesome to process the parts, and the cost of implementation and application is high. Therefore, most of the electric hammers on the market are not designed with such a switching function.

In the actual drilling on the wall tiles, the operators usually use a combination of pistol drills, electric hammers and corresponding drill bits. The process steps first need to use a pistol drill to install a special drill bit for tiles, and gently grind off the glaze on the tiles at a low speed. Small pieces, then drill through the tile layer, then use an impact drill or a light hammer to install a concrete drill bit to drill the hole to the desired depth.

It can be seen that drilling holes on the tiles on the wall requires carrying two power tools and switching back and forth to complete one drilling. This has a great impact on projects like suspended ceilings, because the characteristics of suspended ceiling projects are: ① a large number of holes (each wall needs to be drilled in rows); ② the operator needs to stand on a ladder or workbench to complete; ③ the operator The station has a certain height and small space; in such an environment, carrying two power tools at the same time and switching frequently will have a great impact on work efficiency, labor intensity and personal safety.

In addition, in the current decoration style, there are more and more tiles and wood veneer on the wall. Similarly, drilling holes deep into the wall on the wood veneer, and directly drilling with an electric hammer will cause great damage to the board surface. Therefore, it is also necessary to use a pistol drill with a flat drilling function to drill holes on the surface of the board, and then use an electric hammer to drill holes on the wall to protect the integrity of the board surface. For this operation, it is also necessary to carry the above two power tools. to switch. On the other hand, in the process of using the pistol drill to drill the tiles, because the feed rate is controlled by manpower, in order to complete the drilling quickly, the drill bit is often broken due to excessive force.

SUMMARY OF THE INVENTION

Aiming at the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a flat drill device, which is mounted in an electric hammer so that the electric hammer can extend the function of a flat drill.

The purpose of the present invention is achieved through the following technical solutions: a flat drilling device, mounted in the auxiliary handle of an electric hammer, comprising a power output gear arranged on the outer edge of the front end of the main chuck of the electric hammer, and a power output gear The connected power transfer assembly, the fixed assembly for fixing the power transfer assembly, the drilling execution assembly installed at the front end of the power transfer assembly, the automatic feeding assembly installed in the power transfer assembly and connected with the drilling execution assembly .

Preferably, the power transfer assembly includes a vertical shaft whose axis is parallel to the auxiliary handle, a power access gear rotatably installed in the vertical shaft and meshed with the power output gear, and a first bevel gear connected with the power access gear through the connecting shaft. The present invention mainly adopts bevel gears for transmission in the power transfer part, and its purpose is to reduce the space as much as possible, reduce the visual obstruction, and also reduce the weight.

Preferably, the fixing assembly includes an inner support fastening set located at the position near the upper edge of the auxiliary handle and facing the front end, and a ratchet locking set provided in the auxiliary handle to unlock and lock the tightening and loosening of the inner support fastening set , one end is screwed with the vertical shaft and the other end is connected with the inner support fastening kit. The tightening of the circular inner support method has accurate centering, that is, the error after repeated clamping is extremely small, and the reliability of the tightening is high. The principle is like the three-jaw chuck of a lathe, and the ratchet locking method is also simple and reliable.

Preferably, the drilling execution assembly includes a second bevel gear disposed inside the vertical shaft toward the front end and meshing with the first bevel gear, a Morse taper shank chuck provided at the front end of the second bevel gear, and a Morse taper shank clamp The lower part of the head and the auxiliary support hinged on the vertical shaft. The Morse taper shank chuck is a common connection method for mechanical drilling machines. The connection is reliable and easy to disassemble. The auxiliary support can be used to adjust the positioning of the drill bit. On the other hand, it is used to control the drill bit. Compared with the instability of the manual control of the feed of the hole in the prior art, the improved feed is provided by the automatic feeding component evenly and linearly, which is beneficial to the quality of the drilling and the wear of the drill bit.

Preferably, the automatic feeding assembly includes a spline shaft, one end of which is connected to the Morse taper shank collet and the other end passes through the second bevel gear and can rotate synchronously and slide relative to the second bevel gear. A third bevel gear meshed with the bevel gear and opposite to the second bevel gear, a reduction pinion located outside the vertical shaft and coaxially connected to the third bevel gear, a reduction gear set outside the vertical shaft and meshed with the reduction pinion , set as a reciprocating screw coaxially and detachably connected with the reduction gear, set as a sliding sleeve that transmits power with the reciprocating screw through internal rolling bodies and pins, set coaxial with the reduction pinion and can slide through The push piece inserted into the third bevel gear is set as a connecting piece connecting the push piece with the sliding sleeve. The feeding amount is provided by the designed automatic feeding assembly. The automatic feeding assembly can be rotated and slid by setting the spline shaft, and the reciprocating screw and the sliding sleeve are arranged to cooperate as the pushing actuator, which is similar to the existing technology. In contrast, the stroke of the reciprocating screw can protect the drill bit from breaking or increasing wear due to excessive artificial force.

Preferably, the front end connecting part of the spline shaft is set to have a taper that matches the taper hole of the Morse taper shank chuck, the middle part is the spline part, the end of the spline part is provided with a spring stopper, and the spline shaft is The diameter of the end part matches the diameter of the shaft center hole of the third bevel gear. The spline shaft is arranged in three sections for different functions, and the design is simple and practical.

Preferably, the automatic feeding assembly further comprises a return spring sleeved on the outer circumference of the spline portion of the spline shaft; the return spring is located between the second bevel gear and the third bevel gear. The return spring completes the return in this position and utilizes the space.

Preferably, the auxiliary support member includes a support body that can be turned over to a horizontal limit and abutted on the vertical shaft, and an adjustment support portion that is sleeved on the outer peripheral surface of the support body and can be slidably locked; escape hatch. The auxiliary support can be folded and stretched in length, which facilitates storage and increases the scope of application.

To sum up, the present invention has the following advantages compared with the prior art:

The present invention is mounted in the auxiliary handle of the electric hammer, and includes a power output gear arranged on the outer edge of the front end of the main chuck of the electric hammer, a power transfer component connected with the power output gear, and a fixed component for fixing the power transfer component. , a drilling executive assembly installed at the front end of the power transfer assembly, and an automatic feed assembly installed in the power transfer assembly and connected with the drilling executive assembly. The various components set up are connected to each other to form positioning and support each other in function, that is, to realize the simultaneous realization of flat drilling and automatic feeding by using the original power source, and the two functions are improved under the simplified structure, which avoids the blindness of the original manpower. The feed rate will cause great damage to the drilled bricks and plates.

The flat drilling function added in the present invention is an extension outside the structure, and does not change the internal structure of the electric hammer, so the original impact performance is not affected, and each component that realizes the flat drilling function can be loaded and unloaded as required and carried with the electric hammer itself , It is very convenient to use, and the structures that interact with each other are also mature structures, so the structural stability is good, especially when drilling tiles at a high position, it is no longer necessary to carry two electric tools.

Description of drawings

Fig. 1 is the structural representation of the present invention;

2 is a schematic structural diagram of the present invention after the vertical shaft and the connecting sleeve are partially cut away in order to facilitate internal observation;

Fig. 3 is the partial enlarged view of A place in Fig. 2;

Figure 4 is a schematic diagram of the structure after the spline shaft and the Morse taper shank are disassembled;

FIG. 5 is a schematic structural diagram of the drill bit in the extended state after the drilling execution assembly and the automatic feeding assembly are combined;

6 is a schematic structural diagram of the drill bit in a retracted state after the drilling execution assembly and the automatic feeding assembly are combined;

FIG. 7 is a schematic structural diagram of the present invention when it is stored.

Marked in the figure:

Main chuck 011; Power output gear 012; Auxiliary handle 02; Power transfer assembly 10; Vertical shaft 11; Power access gear 12; First bevel gear 13; Fixing assembly 20; ; Connecting sleeve 23; Drilling executive assembly 30; Second bevel gear 31; Morse taper shank chuck 32; Auxiliary support 33; Support body 331; ; Front connecting part 411; Spring flap 412; End part 413; Third bevel gear 42; Reduction pinion 43; Reduction gear 44; Reciprocating screw 45; 49.

Detailed ways

The present invention will be further described below in conjunction with the embodiments represented by the accompanying drawings:

Example 1

As shown in Figures 1-3, a flat drilling device is mounted in the auxiliary handle 02 of the electric hammer, and some components can be installed and disassembled as required, and can be stored in the auxiliary handle 02 after disassembly, so as to be carried with the electric hammer. , including the power output gear 012 arranged on the outer edge of the front end of the main chuck 011 of the electric hammer, the power transfer assembly 10 connected with the power output gear 012, the fixing assembly 20 for fixing the power transfer assembly 10, and installed on the power The drilling execution assembly 30 at the front end of the adapter assembly 10 is installed in the power adapter assembly 10 and is connected with the automatic feeding assembly 40 of the drilling execution assembly 30 .

The power transfer assembly 10 includes a vertical shaft 11 whose axis is parallel to the auxiliary handle 02, a power access gear 12 rotatably installed in the vertical shaft 11 and meshed with the power output gear 012, and a second power access gear 12 connected to the power access gear 12 through the connecting shaft. a bevel gear 13;

The fixing assembly 20 includes an inner support tightening kit 21 disposed near the upper edge of the auxiliary handle 02 and facing the front end, and a ratchet wheel disposed in the auxiliary handle 02 to unlock and lock the tightening and loosening of the inner support fastening kit 21 The locking kit 22 is a connecting sleeve 23 that is threadedly connected to the vertical shaft 11 at one end and the inner support fastening kit 21 at the other end; Any structure that can lock the rotation of the inner support fastening set 21 , such as a bayonet. The structure of the inner support fastening kit 21 is like a three-jaw chuck, and the adjusting member is arranged on the side of the auxiliary handle 02 close to the fuselage, which is common knowledge to those skilled in the art and will not be repeated here.

The drilling execution assembly 30 includes a second bevel gear 31 arranged inside the vertical shaft 11 and facing the front end and meshing with the first bevel gear 13 , a Morse taper shank chuck 32 arranged at the front end of the second bevel gear 31 , and a Morse taper shank 32 arranged in the Morse The lower part of the taper shank chuck 32 and the auxiliary support 33 hinged on the vertical shaft 11;

The automatic feeding assembly 40 includes a spline shaft 41 , one end of which is connected to the Morse taper shank collet 32 and the other end passes through the second bevel gear 31 and can rotate synchronously and slide relative to the second bevel gear 31 , and is arranged on the vertical shaft 11 . The third bevel gear 42, which meshes with the first bevel gear 13 inside and is opposite to the second bevel gear 31, and the reduction pinion 43, which is arranged outside the vertical shaft 11 and is coaxially connected to the third bevel gear 42, is arranged outside the vertical shaft 11. The reduction gear 44 meshing with the reduction pinion 43 is arranged as a reciprocating screw 45 that is coaxially and detachably connected with the reduction gear 44, and is arranged as a sliding drive that transmits power with the reciprocating screw 45 through the internal rolling body and the pin shaft. The sleeve 46 is arranged to be coaxial with the reduction pinion 43 and can slide through the pusher 47 inside the third bevel gear 42, and is arranged as a connecting piece 48 connecting the pusher 47 to the sliding sleeve 46; shown in FIG. 4 , the front end connecting part 411 of the spline shaft 41 is set to have a taper that matches the taper hole of the Morse taper shank chuck 32, the middle part is a spline part, and the end of the spline part is provided with a spring stopper 412, the spline The diameter of the end portion 413 of the shaft 41 matches the diameter of the shaft center hole of the third bevel gear 42; the automatic feeding assembly 40 also includes a return spring 49 sleeved on the outer circumference of the spline portion in the spline shaft 41; the return spring 49 is in the second The position between the bevel gear 31 and the third bevel gear 42 (since the thickness of the drilled tile or wood veneer is about 10mm, so the distance between the second bevel gear 31 and the third bevel gear 42 is set to 10mm plus The size after the upper return spring 49 is compressed to the minimum thickness);

working principle:

1. The working principle of the drilling execution assembly 30 is as shown in FIG. 6 , when the first bevel gear 13 rotates, the second bevel gear 31 rotates along with it, and the corresponding spline shaft 41 rotates synchronously, thereby driving the Morse taper shank When the chuck 32 is rotated, the drill bit clamped in the Morse taper shank chuck 32 is rotated, thereby realizing drilling and cutting;

2. The action principle of the automatic feeding assembly 40 is as shown in Figures 5 and 6, Figure 6 is the state diagram of the Morse taper shank chuck 32 when it is fully retracted, and Figure 5 is the Morse taper shank chuck 32 fully extended The state diagram at the time of exit; the retraction and extension of the Morse taper shank chuck 32 are controlled by the rotation of the first bevel gear 13. Specifically, when the first bevel gear 13 rotates, it drives the third bevel gear 42 to rotate at the same time. When the third bevel gear 42 rotates, the deceleration pinion 43 rotates synchronously, and the deceleration pinion 43 drives the deceleration large gear 44 to rotate. When the deceleration large gear 44 rotates, the reciprocating screw 45 rotates along with it, and the sliding sleeve 46 is in the reciprocating screw. The rotation of 45 moves to the side of the Morse taper shank chuck 32, where the sliding sleeve 46 can reciprocate in the thread of the reciprocating screw 45 under the continuous rotation of the first bevel gear 13. At the same time, the sliding sleeve 46 The pusher 47 moves to one side of the Morse taper shank collet 32 synchronously with the pusher 47 under the connection of the connecting piece 48, so that the end of the pusher 47 (that is, the end located in the axial hole of the third bevel gear 42) pushes the end Part 413, the thrust presses the spring blocking piece 412 and overcomes the elastic force of the return spring 49, so that the spline shaft 41 moves in the direction of the Morse taper shank chuck 32 as a whole, and the spline shaft 41 and the Morse taper shank chuck 32 are Coaxial connection, so that the Morse taper shank chuck 32 can realize automatic feeding while rotating, that is, a drilling is completed; during the whole action process, when the sliding sleeve 46 moves to the end of the thread of the reciprocating screw 5, the first bevel gear 13 continues to rotate, the sliding sleeve 46 begins to retract, and the return spring 49 loses its resisting force, and its elastic force pushes the spline shaft 41 away from the Morse taper shank as a whole. One end of the chuck 32 is moved (that is, returned to the initial position). During the above working process, the designed reduction pinion 43 and reduction gear 44 reduce the rotational speed, which is relative to the overall feed rate. The rotation speed of the drill bit in the Morse taper shank chuck 32 does not decrease, so that a smaller feed rate can be ensured, so as to better protect the surface to be drilled from being damaged.

The auxiliary support 33 is provided to improve the positional accuracy of the drilling, the stability of the drilling, and to control the feed rate. The auxiliary support 33 includes a support body 331 that can be turned over to a horizontal limit and abutted on the vertical shaft 11 . , which is set as an adjustment support part 332 that is sleeved on the outer peripheral surface of the support body 331 and can be slidably locked; the support body 331 is provided with an overturned escape port to avoid the front end of the spline shaft 41 when it is turned over and folded. , turn the auxiliary support 33 to a horizontal position, and adjust the adjustment support 332 to be flush with the bit head in the Morse taper shank chuck 32, so that the contact between the support 332 and the wall before drilling is By adjusting the alignment of the drill bit and the point to be drilled, and at the same time when the electric hammer presses the auxiliary support 33 against the wall during drilling, the feeding amount is only provided by the automatic feeding component 40 .

Storage of the flat drill device: As shown in Figure 7, when the flat drill function is not required, pull out the Morse taper shank chuck 32 from the spline shaft 41, and fold the auxiliary support 33 to the minimum after receiving it. On the vertical shaft 11, place the vertical shaft 11 in the auxiliary handle 02, and other components can be placed in the connecting sleeve 23 according to the needs of accommodation, and then the connecting sleeve 23 and the auxiliary handle 02 are screwed and locked.

Operation simulation of opening holes in wall tiles or wall wood veneer:

Step 1. After power-on inspection, check that the drill bit is not installed on the main chuck 011;

Step 2. Take out the vertical shaft 11 and the Morse taper shank chuck 32 from the auxiliary handle 02, turn the auxiliary support 33 to a horizontal position, press the Morse taper shank chuck 32 to connect with the spline shaft 41, and connect the connection sleeve The relatively small diameter end of the cylinder 23 is threadedly connected to the vertical shaft 11, and then the relatively large diameter end of the connecting sleeve 23 is pressed against the inner support fastening kit 21 (at this time, the power output gear 012 and the power access gear 12 are in meshing state. ), rotate the adjustment piece in the inner support fastening kit 21 to fasten the connecting sleeve 23, and the ratchet locking kit 22 locks the inner support fastening kit 21;

Step 3. Load the corresponding special drill bit for ceramic tile or special drill bit for wood board into the Morse taper shank chuck 32;

Step 4. Adjust the distal surface of the adjusting support portion 332 to be flush with the drill bit head;

Step 5. Abut the far end surface of the adjusting support portion 332 against the edge of the wall to be turned, and then move the abutting point to the position where the drill bit is aligned with the wall to be drilled;

Step 6. Press the start switch in the electric hammer, and the main chuck 011 rotates. According to the above principle, it can be known that the Morse taper chuck 32 rotates synchronously with the drill bit, and the automatic feeding component 40 starts feeding until the set feed is reached. After the distance of about 10mm is in place, it will automatically retract (the main chuck 011 will repeatedly feed and retract if it does not stop), thus completing a drilling on the tile or wood surface;

Step 7. Insert a concrete drill into the main chuck 011 to drill the hole to the required depth, thereby completing one drilling.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definitions of the appended claims range.

Claims (8)

1. A flat drilling device, mounted in an auxiliary handle (02) of an electric hammer, characterized in that it comprises a power output gear (012) arranged on the outer edge of the front end of the main chuck (011) of the electric hammer, and a power output gear (012). A power transfer assembly (10) connected to the output gear (012), a fixing assembly (20) for fixing the power transfer assembly (10), and a drilling execution assembly (30) installed at the front end of the power transfer assembly (10) , an automatic feeding assembly (40) installed in the power transfer assembly (10) and connected with the drilling execution assembly (30). 2 . The flat drilling device according to claim 1 , wherein the power adapter assembly ( 10 ) comprises a vertical shaft ( 11 ) whose axis is parallel to the auxiliary handle ( 02 ), and is rotatably mounted on the vertical shaft ( 11 ). 3 . A power access gear (12) in the middle and meshed with the power output gear (012), and a first bevel gear (13) connected with the power access gear (12) through a connecting shaft. 3 . The flat drilling device according to claim 2 , wherein the fixing assembly ( 20 ) comprises an inner support fastening kit ( 21 ) disposed at the position of the auxiliary handle ( 02 ) close to the upper edge and facing the front end. 3 . In the auxiliary handle (02), the ratchet locking kit (22) is used to unlock and lock the fastening and loosening of the inner support fastening kit (21), one end is screwed with the vertical shaft (11) and the other end is fastened with the inner support Connecting sleeve (23) to which kit (21) is attached. 4 . The flat drilling device according to claim 2 , characterized in that the drilling execution assembly ( 30 ) comprises a second cone disposed inside the vertical shaft ( 11 ) toward the front end and meshing with the first bevel gear ( 13 ). 5 . The gear (31), the Morse taper shank collet (32) arranged at the front end of the second bevel gear (31), is arranged at the lower part of the Morse taper shank collet (32) and is hinged on the vertical shaft (11) auxiliary Support (33). 5 . The flat drilling device according to claim 4 , wherein the automatic feeding assembly ( 40 ) comprises one end connected to the Morse taper shank chuck ( 32 ) and the other end passing through the second bevel gear ( 31 ). 6 . ) and a spline shaft (41) that can rotate synchronously and relatively slide with the second bevel gear (31), is arranged inside the vertical shaft (11) and meshes with the first bevel gear (13) and is meshed with the second bevel gear (31) The opposite third bevel gear (42), a reduction pinion (43) arranged outside the vertical shaft (11) and coaxially connected to the third bevel gear (42), arranged outside the vertical shaft (11) and connected to the reduction pinion (43) The meshing reduction gear (44) is arranged as a reciprocating screw (45) that is coaxially and detachably connected to the reduction gear (44), and is arranged to be connected with the reciprocating screw (45) through internal rolling bodies and pins The sliding sleeve (46) for transmitting the power by the shaft is arranged to be coaxial with the reduction pinion (43) and can slide through the pusher (47) inside the third bevel gear (42), and is arranged to push the pusher (47) The connecting piece (48) is connected with the sliding sleeve (46). 6 . The flat drilling device according to claim 5 , wherein the front end connecting portion ( 411 ) of the spline shaft ( 41 ) is configured to have a taper hole matching with the Morse taper shank chuck ( 32 ). 7 . The middle part is the spline part, the end of the spline part is provided with a spring stopper (412), the diameter of the end part (413) of the spline shaft (41) is the same as the diameter of the shaft center hole of the third bevel gear (42). match. 7 . The flat drilling device according to claim 6 , wherein the automatic feeding assembly ( 40 ) further comprises a return spring ( 49 ) sleeved on the outer periphery of the spline portion in the spline shaft ( 41 ); reset The spring (49) is in a position between the second bevel gear (31) and the third bevel gear (42). 8 . The flat drilling device according to claim 2 , wherein the auxiliary support ( 33 ) comprises a support body ( 331 ) configured to be flipped to a horizontal limit and abutted on the vertical shaft ( 11 ), 8 . An adjustment support portion (332) sleeved on the outer peripheral surface of the support body (331) and capable of sliding and locking is provided; the support body (331) is provided with an overturned escape opening.

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