Handheld electric impact drill and impact mechanism thereof

Abstract

The impact mechanism comprises a shell, a middle pipe is installed at one end of the shell, the impact mechanism is installed in the shell, the impact mechanism comprises a motor, the motor is installed in the shell, a supporting rod is fixedly arranged at the output end of the motor, and a first gear is fixedly arranged at the end, away from the motor, of the supporting rod; a first gear is installed on the middle pipe, a second gear is arranged on the first gear in a meshed mode, bevel teeth are installed on the inner side of the second gear, a third gear is arranged on the bevel teeth in a meshed mode, a long rod is fixedly arranged in the third gear in a sleeved mode, and the long rod penetrates through the middle pipe and the rotating pipe and is fixedly connected with the installation pipe. The motor is easy to damage after long-term use; meanwhile, a wireless machine type needs to be powered by a bottom battery pack, the weight of the whole machine is remarkably improved by the added battery base, and the handheld load of an operator is further increased.

Description

Technical Field

[0001] The present invention relates to the technical field of impact electric drills, in particular to a handheld impact electric drill and an impact mechanism thereof. Background Art

[0002] An impact drill is a handheld power tool that has both rotary cutting and axial impact functions. It is highly efficient and adaptable when drilling holes in a variety of materials such as concrete, masonry, metal, and wood. It has been widely used in construction decoration, equipment installation, and home DIY.

[0003] When existing impact drills are working, the reaction force generated directly acts on the motor, which can easily cause damage to the motor with long-term use. At the same time, wireless models need to be powered by a battery pack at the bottom. The added battery base significantly increases the weight of the entire machine, further increasing the operator's hand-held load. Therefore, the present invention proposes a handheld impact drill and its impact mechanism to solve the above problems. Summary of the Invention

[0004] In view of the above-mentioned defects in the prior art, the object of the present invention is to provide a handheld impact drill and an impact mechanism thereof.

[0005] To achieve the above-mentioned objectives, the present invention provides a handheld impact electric drill and its impact mechanism, comprising a shell, an intermediate tube is installed at one end of the shell, a rotating tube is fixedly provided at the end of the intermediate tube away from the shell, a mounting tube is installed at the end of the rotating tube away from the intermediate tube, an impact mechanism is installed in the shell, the impact mechanism comprises a motor, the motor is installed in the shell, a support rod is fixedly provided at the output end of the motor, a first gear is fixedly provided at the end of the support rod away from the motor, a second gear is meshed with the first gear, bevel teeth are installed on the inner side of the second gear, a third gear is meshed with the bevel teeth, a long rod is fixedly sleeved in the third gear, the long rod passes through the intermediate tube and the rotating tube and is fixedly connected to the mounting tube.

[0006] Furthermore, a sleeve is fixedly installed in the middle tube, the long rod is rotatably inserted in the sleeve, and adjustment clamps are evenly provided on the inner wall of the installation tube at equal angles, and a drill rod is clamped and installed between several of the adjustment clamps.

[0007] Furthermore, a vertical plate is fixedly provided in the shell, the vertical plate is fixedly provided at the bottom of the shell, a motor is fixedly provided on the inner wall of the upper end of the vertical plate, a first reinforcement block is fixedly provided on the outer wall of the vertical plate, and a second reinforcement block is fixedly provided on the inner wall of the lower end of the vertical plate, and the bottoms of the first reinforcement block and the second reinforcement block are both fixedly provided on the bottom of the shell.

[0008] Furthermore, a rotating rod is fixedly provided on the outer side of the second gear, and one end of the rotating rod away from the second gear is rotatably connected to a supporting block, and the supporting block is fixedly provided on the bottom of the housing.

[0009] Furthermore, a connecting block is fixedly provided on the inner side of the second gear, a round block is fixedly provided on one end of the connecting block away from the second gear, and one end of the round block away from the connecting block is fixedly connected to the bevel gear.

[0010] Furthermore, the outer wall of the rotating tube is fixed with multiple anti-slip protrusions in an equiangular ring shape. The anti-slip protrusions are arranged in a long strip shape and have a thickness of 0.4-0.8 cm. A display screen is embedded in the side wall of the shell and is electrically connected to the CPU controller.

[0011] Furthermore, a handle is fixedly provided at the bottom of the shell, a power board is fixedly provided at the bottom of the handle, a charging base is provided below the power board, a card slot is installed on the top of the charging base, and the power board is installed in the card slot to connect to the power supply.

[0012] Furthermore, installation grooves are provided on both sides of the bottom of the power connection board and on both sides of the top of the card slot, and a terminal post is fixed in the installation groove. A slot is provided on the side wall of the terminal post, and a power connection pole is inserted and installed in the slot, and an electric wire is fixed between the two longitudinally arranged power connection poles.

[0013] Furthermore, a pull rod is fixedly provided on one side of the bottom of the power connection pole, and the pull rod is arranged in a ring shape. Buffer clamp mechanisms are respectively provided on both sides of the slot, and the buffer clamp mechanism is used to clamp and fix the power connection pole. The buffer clamp mechanism includes a groove, and a clamping block part is movably provided in the groove. The clamping block part includes a first clamping block, and the longitudinal section of the first clamping block is arranged in a right-angled trapezoid. A second clamping block is fixedly provided on the top of the first clamping block, and a buffer block is fixedly provided on the bottom of the groove, and the buffer block is fixedly connected to the clamping block part.

[0014] Furthermore, the longitudinal section of the second clamp is rectangular, and telescopic rods are fixedly provided on the inner walls of the first clamp and the second clamp respectively. One end of the telescopic rod away from the clamp is fixedly provided on the inner wall of the groove, and a buffer spring is sleeved on the telescopic rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a three-stage gear transmission structure, namely, the first gear → the second gear → the bevel gear → the third gear. The reaction force generated when the impact drill is working acts on the bevel gear, the second gear and the first gear in sequence. The reaction force is sequentially unloaded by the bevel gear, the second gear and the first gear. The unloaded reaction force finally acts on the motor, which can play a role in unloading and protecting the motor and improve the service life of the motor. The reaction force is unloaded step by step, and the force acting on the motor is greatly reduced, which significantly extends the service life of the motor. 2. The present invention adopts a detachable charging base design: the charging base can be removed during operation and power is directly supplied through the terminal block + power pole, which significantly reduces the weight of the handheld device. When charging, the device can be quickly connected through the card slot + power board, which takes into account both convenience and lightness. 3. The motor of the present invention is rigidly fixed to the housing by the first and second reinforcement blocks of the riser, which improves the firmness of the riser installation and thus provides support for the motor installation; 4. The present invention connects the power supply of the impact drill by inserting the power board at the bottom of the handle into the card slot of the charging base. When the charging base is heavy and affects the operation, the charging base is removed and the terminal is connected to the power rod to connect. When the impact drill is working, there is no need to install the charging base at the bottom of the impact drill, which reduces the hand-held load of the operator. 5. The present invention provides long anti-slip protrusions on the outer wall of the rotating tube to enhance the grip stability; the connecting pole is equipped with a circular pull rod to facilitate quick plugging and unplugging of the connecting pole; 6. The present invention partially clamps the pole by means of a buffer spring, a buffer block and a clamping block to prevent loosening, thereby ensuring stable charging and avoiding poor contact or loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the solutions in the present invention, a brief introduction is given below to the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 It is the main perspective view provided by the present invention; Figure 2 It is a rear perspective diagram provided by the present invention; Figure 3 It is a right-side stereogram provided by the present invention; Figure 4 It is a left-view stereo provided by the present invention; Figure 5 This is a schematic diagram of the main structure provided by the present invention; Figure 6 It is a schematic diagram of the local structure provided by the present invention; Figure 7 is a cross-sectional view of a terminal provided by the present invention; Figure 8 It is an enlarged schematic diagram of part A provided by the present invention; Figure 9 It is an enlarged schematic diagram of part B provided by the present invention; Figure 10 It is an enlarged schematic diagram of the C portion provided by the present invention; Description of reference numerals: 1. Shell; 2. Handle; 3. Power board; 4. Charging base; 5. Mounting tube; 6. Drill rod; 7. Rotating tube; 8. Intermediate tube; 9. Casing; 10. Long rod; 11. Vertical plate; 12. Motor; 13. First reinforcement block; 14. Second reinforcement block; 15. Support block; 16. Rotating rod; 17. Connecting block; 18. Round block; 19. Bevel gear; 20. Third gear; 21. Second gear; 22. Support rod; 23. First gear; 24. Slot; 25. Mounting slot; 26. Terminal; 27. Power pole; 28. Pull rod; 29. ​​Wire; 30. Slot; 31. Groove; 32. Telescopic rod; 33. Buffer spring; 34. Buffer block; 35. Second clamping block; 36. First clamping block; 37. Clamping block part; 38. Display screen; 39. Adjusting clamping block; 40. Impact mechanism; 41. Anti-slip protrusion. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the scope of protection of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making any creative work are within the scope of protection of the present invention.

[0019] The terms "including," "having," and any variations thereof in the present specification, claims, and accompanying drawings are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the present specification, claims, and accompanying drawings are used to distinguish between different items, not to describe a specific order.

[0020] See also Figure 1-10A handheld impact drill and its impact mechanism include a housing 1, an intermediate tube 8 is installed at one end of the housing 1, a rotating tube 7 is fixedly provided at the end of the intermediate tube 8 away from the housing 1, a mounting tube 5 is installed at the end of the rotating tube 7 away from the intermediate tube 8, an impact mechanism 40 is installed in the housing 1, and the impact mechanism 40 includes a motor 12, the motor 12 is installed in the housing 1, a support rod 22 is fixedly provided at the output end of the motor 12, a first gear 23 is fixedly provided at the end of the support rod 22 away from the motor 12, and the first gear 23 is meshed with a second gear 21, and the second gear 22 is meshed with the first gear 23. The outer side of the gear 21 is fixed with a rotating rod 16, and the end of the rotating rod 16 away from the second gear 21 is rotatably connected to the support block 15, and the support block 15 is fixedly arranged at the bottom of the housing 1. The inner side of the second gear 21 is installed with a bevel gear 19, and the bevel gear 19 is meshed with the third gear 20. The inner side of the second gear 21 is fixed with a connecting block 17, and the end of the connecting block 17 away from the second gear 21 is fixed with a round block 18. The end of the round block 18 away from the connecting block 17 is fixedly connected to the bevel gear 19. A long rod 10 is fixedly sleeved in the third gear 20, and the long rod 10 passes through An intermediate tube 8 and a rotating tube 7 are provided and fixedly connected to the mounting tube 5. A sleeve 9 is fixedly provided in the intermediate tube 8. A long rod 10 is rotatably inserted in the sleeve 9. Adjustment clamps 39 are uniformly provided on the inner wall of the mounting tube 5 at equal angles. A drill rod 6 is clamped and installed between several adjustment clamps 39. After the motor 12 is started, the support rod 22 at the output end drives the first gear 23 to rotate. The first gear 23 engages the second gear 21. The second gear 21 is stably supported by the rotating rod 16 and the support block 15, transmitting power to the inner bevel gear 19, which engages the third gear 20. , converting the rotation direction and driving the long rod 10 to rotate at high speed. The long rod 10 passes through the intermediate tube 8 and the rotating tube 7, and finally drives the mounting tube 5 and the clamped drill rod 6 to rotate, realizing the cutting function. The reaction force generated when the impact electric drill is working acts on the bevel gear 19, the second gear 21 and the first gear 23 in sequence. The reaction force is unloaded in sequence through the bevel gear 19, the second gear 21 and the first gear 23. The reaction force after unloading finally acts on the motor 12, which can play a role in unloading protection for the motor 12 and improve the service life of the motor 12.

[0021] As an improvement of the above technical solution, a vertical plate 11 is fixedly provided in the shell 1, and the vertical plate 11 is fixedly provided at the bottom of the shell 1. A motor 12 is fixedly provided on the inner wall of the upper end of the vertical plate 11, and a first reinforcement block 13 is fixedly provided on the outer wall of the vertical plate 11. A second reinforcement block 14 is fixedly provided on the inner wall of the lower end of the vertical plate 11. The bottoms of the first reinforcement block 13 and the second reinforcement block 14 are both fixedly provided at the bottom of the shell 1. The motor 12 is rigidly fixed to the shell 1 by the first reinforcement block 13 and the second reinforcement block 14 of the vertical plate 11, which improves the firmness of the installation of the vertical plate 11, thereby providing support for the installation of the motor 12.

[0022] As an improvement of the above technical solution, the outer wall of the rotating tube 7 is fixed with multiple anti-slip protrusions 41 in an equiangular ring shape. The anti-slip protrusions 41 are arranged in a long strip shape, and the thickness of the anti-slip protrusions 41 is 0.4-0.8 cm. The side wall of the shell 1 is embedded with a display screen 38. The display screen 38 displays the motor speed, power and other data in real time. The output power is adjusted by the CPU controller to avoid overload. The display screen 38 is electrically connected to the CPU controller. The sleeve 9 supports the long rod 10 to reduce vibration transmission; the anti-slip protrusions 41 of the rotating tube 7 enhance the grip stability and reduce the operator's hand fatigue.

[0023] As an improvement of the above technical solution, a handle 2 is fixedly provided at the bottom of the shell 1, a power board 3 is fixedly provided at the bottom of the handle 2, a charging base 4 is provided below the power board 3, and a card slot 24 is installed on the top of the charging base 4. The power board 3 is installed in the card slot 24 to connect the power supply. The power board 3 at the bottom of the handle 2 is inserted into the card slot 24 of the charging base 4 to complete the connection of the power supply of the impact drill.

[0024] As an improvement to the above technical solution, mounting grooves 25 are provided on both sides of the bottom of the power board 3 and on both sides of the top of the card slot 24. A terminal 26 is fixedly installed in the mounting groove 25. A slot 30 is provided on the side wall of the terminal 26. A power pole 27 is inserted and installed in the slot 30. An electric wire 29 is fixedly installed between the two longitudinally arranged power poles 27.

[0025] As an improvement of the above technical solution, a pull rod 28 is fixedly provided on one side of the bottom of the connecting pole 27, and the pull rod 28 is set in a ring shape. The pull rod 28 is set to facilitate the quick insertion and removal of the connecting pole 27. Buffer clamp mechanisms are respectively provided on both sides of the slot 30. The buffer clamp mechanism is used to clamp and fix the connecting pole 27. The buffer clamp mechanism includes a groove 31, and a clamping block portion 37 is movably provided in the groove 31. The clamping block portion 37 includes a first clamping block 36. The longitudinal section of the first clamping block 36 is a right-angled trapezoidal setting. A second clamping block 35 is fixedly provided on the top of the first clamping block 36. A buffer block 34 is fixedly provided at the bottom of the groove 31. The buffer block 34 is fixedly connected to the clamping block portion 37. The second clamping block The longitudinal section of the block 35 is rectangular, and the inner walls of the first clamping block 36 and the second clamping block 35 are respectively fixed with a telescopic rod 32. The end of the telescopic rod 32 away from the clamping block part 37 is fixedly set on the inner wall of the groove 31, and a buffer spring 33 is sleeved on the telescopic rod 32. When the charging base 4 is heavy and affects the operation, the charging base 4 is removed, and the terminal 26 is contacted and connected with the power pole 27. The buffer clamp mechanism in the slot 30 clamps the power pole 27 through the buffer spring 33, the buffer block 34 and the clamping block part 37 to prevent loosening and ensure stable charging. When the impact drill is working, there is no need to install the charging base 4 at the bottom of the impact drill, which reduces the operator's hand-held load.

[0026] Working principle and usage of the present invention: When in use, after the motor 12 is started, the support rod 22 at the output end drives the first gear 23 to rotate, the first gear 23 engages the second gear 21, and the second gear 21 is stably supported by the rotating rod 16 and the support block 15, transmitting power to the inner bevel gear 19, the bevel gear 19 engages the third gear 20, converting the rotation direction and driving the long rod 10 to rotate at high speed, the long rod 10 passes through the intermediate tube 8 and the rotating tube 7, and finally drives the mounting tube 5 and the clamped drill rod 6 to rotate, realizing the cutting function, and the reaction force generated when the impact drill is working, the reaction force acts on the bevel gear 19, the second gear 21 and the first gear 23 in turn, and the reaction force is unloaded in turn through the bevel gear 19, the second gear 21 and the first gear 23, and the reaction force after unloading finally acts on the motor 12, which can play a role in unloading protection for the motor 12, thereby improving the efficiency of the motor 1 2's service life; the motor 12 is rigidly fixed to the housing 1 through the first reinforcement block 13 and the second reinforcement block 14 of the vertical plate 11, which improves the firmness of the installation of the vertical plate 11, thereby providing support for the installation of the motor 12; the sleeve 9 supports the long rod 10 to reduce vibration transmission; the anti-slip protrusion 41 of the rotating tube 7 enhances the grip stability and reduces the operator's hand fatigue; the power connection board 3 at the bottom of the handle 2 is inserted into the slot 24 of the charging base 4 to complete the connection of the power supply of the impact drill. When the charging base 4 is heavy and affects the operation, remove the charging base 4, and make the terminal 26 contact and connect with the power rod 27. The power rod 27 is clamped by the buffer spring 33, the buffer block 34 and the clamping block part 37 to prevent loosening and ensure stable charging. When the impact drill is working, there is no need to install the charging base 4 at the bottom of the impact drill, which reduces the operator's hand-held load.

[0027] Example 1. Implementation Environment Applicable scenarios: interior decoration, exterior wall drilling, concrete / brick / wood and other multi-material drilling.

[0028] Supporting tools: charging base (including AC-DC adapter 220V→36V / 4A), several Φ6-Φ12mm alloy drill bits, torque test bench, vibration tester, and life testing machine.

[0029] 2. Implement the whole machine composition Shell 1: PC+ABS injection molding, wall thickness 2.5mm, internal reserved ribs.

[0030] Handle 2: Secondary TPE coating, Shore 60°, with aluminum alloy power board 3 embedded at the bottom (size 40mm×25mm×2mm).

[0031] Rotating tube 7: 6061-T6 aluminum profile, outer diameter 48 mm, wall thickness 2 mm, 8 anti-slip protrusions 41 are CNC-milled on the outer wall, the protrusion cross-section is a 0.6 mm × 6 mm long strip, and the length is 60 mm.

[0032] Mounting tube 5: Hexagon socket at the front end, built-in 3 spring steel adjustment clamps 39, clamp stroke 3mm, suitable for drill shank diameter 6-13mm.

[0033] Motor 12: Brushless DC motor, rated 36V / 800W, peak 1200W, no-load 28000rpm, shaft end milled flat.

[0034] Support rod 22: 40Cr quenched and tempered, 8mm in diameter, with a keyway at one end transitionally fitted with the motor shaft and an M6 thread at the other end locking the first gear 23.

[0035] First gear 23: 45 steel, module 1mm, number of teeth 12, tooth width 8mm; Second gear 21: 45 steel, module 1mm, number of teeth 30, tooth width 8mm; Bevel gear 19: 20CrMnTi carburized and quenched, module 1.5mm, helix angle 35°; The third gear 20:45 steel, module 1.5mm, number of teeth 14, interference fit with the long rod 10.

[0036] Long rod 10: GCr15 hollow shaft, outer diameter 12mm, inner diameter 6mm, tempered + high-frequency quenched HRC50; bearing position tolerance at both ends h6.

[0037] Intermediate tube 8: An oil-containing sintered copper-based sleeve 9 (inner diameter 12 mm, length 30 mm) is pressed into the inside, with a gap of 0.03 mm between it and the long rod 10, and oil is stored for lubrication.

[0038] Vertical plate 11: ADC12 is made of aluminum die-casting with a thickness of 3 mm; the first reinforcement block 13 and the second reinforcement block 14 are triangular ribs with a wall thickness of 3 mm, which are integrally glued to the bottom of the shell.

[0039] Support block 15: POM injection molding, embedded with Φ6mm×Φ15mm×5mm needle bearing, used to support the rotating rod 16.

[0040] Charging base 4: Dimensions: 120mm × 80mm × 35mm, built-in 10-cell 18650 lithium battery pack, 36V / 6Ah, BMS balancing current: 100mA.

[0041] Two dovetail slide rails are milled on the bottom surface of the power board 3, which match the corresponding slide grooves of the card slot 24. The insertion force is 25N and the extraction force is 30N. Terminal 26: H62 brass, nickel plated 3μm, outer diameter 4mm, height 6mm; Connection rod 27: H62 brass rod, diameter 1.5mm, length 20mm, top chamfer 45°; Pull rod 28: Φ2mm stainless steel ring, knurled surface.

[0042] Groove 31: depth 4mm, width 3mm; First clamping block 36: right-angled trapezoid, 30° slope, made of POM; Second clamping block 35: rectangular 2mm×3mm×6mm; Telescopic rod 32: Φ1mm SUS304 shaft, stroke 2mm; Buffer spring 33: wire diameter 0.2mm, outer diameter 2mm, free length 6mm, elastic force 0.8N when compressed 1mm; Buffer block 34: silicone 60°, size 2mm×2mm×3mm.

[0043] 3 Power supply system connection Align the charging base 4 with the power board 3 and insert them into the slide rails. When you hear a "click", the mechanical and electrical connection is completed. If long-term work is required, the charging base 4 is unplugged and the connecting rod 27 is directly inserted into the slot 30 of the terminal 26. The pull rod 28 is easy to pull out with fingers.

[0044] 4 Performance Verification No-load test: The motor is powered by 1236V, with a no-load current of 3.2A and a noise level of 78dB(A). The speed of the long rod 10 is 26500rpm (1850rpm at the drill bit end, with a reduction ratio of 14.3:1).

[0045] Load test: Φ10mm concrete drill bit, drilling C30 concrete 100mm deep, average current 22A, peak torque 3.8N·m, drill end speed 1100rpm, and overall temperature rise 28K.

[0046] Impact reaction force test: 50,000 impact cycles were simulated on a torque test bench. The motor bearing temperature of the traditional solution rose by 62K, while the motor bearing temperature of this solution rose by 38K, and the service life is expected to be increased by 1.8 times.

[0047] Weight comparison: The whole device including the battery is 2.4kg; without the charging base it is only 1.7kg, a 29% weight reduction.

[0048] Drop test: 12 times on cement floor at 1m height, the connection board is not loose and the connection pole 27 is not broken.

[0049] 5. How to use Before drilling: Adjust the clamping block 39 according to the drill shank diameter, insert the drill bit and lock it.

[0050] Power supply options: Short operation: plug directly into the charging base4 and check the display 38 power at any time; Long operation: Unplug the charging base 4 and connect the 36V DC power supply to the power pole 27.

[0051] Start: Pull the trigger, the CPU controller soft-starts to the set speed; the display 38 shows the speed, remaining power, and overload alarm in real time.

[0052] During operation: hold the anti-slip protrusion 41 of the rotating tube 7 to prevent your hand from slipping.

[0053] Maintenance: Add 2-3 drops of 220# gear oil to the sleeve every 50 hours; check the gear meshing clearance every 200 hours and adjust the gasket if necessary.

[0054] Verification of 6 key innovation points Level 3 unloading: The measured impact reaction force is 180N. After being transmitted through the bevel gear 19 → the second gear 21 → the first gear 23, the motor end is only subjected to 45N, and the unloading efficiency is 75%.

[0055] Separable power supply: After 5000 plug-in and unplug lifespan, contact resistance ≤ 5mΩ, no looseness.

[0056] 7 Conclusion The reaction force is unloaded step by step through three-stage gears, which significantly improves the life of the motor; The detachable charging base enables quick switching between "heavy battery and light body", reducing the weight of the entire device by 29%.

[0057] The above description is only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A handheld impact drill and its impact mechanism, characterized by: The invention comprises a shell (1), wherein an intermediate tube (8) is installed at one end of the shell (1), a rotating tube (7) is fixedly provided at one end of the intermediate tube (8) away from the shell (1), a mounting tube (5) is installed at one end of the rotating tube (7) away from the intermediate tube (8), an impact mechanism (40) is installed in the shell (1), and the impact mechanism (40) comprises a motor (12), the motor (12) is installed in the shell (1), a support rod (22) is fixedly provided at the output end of the motor (12), a first gear (23) is fixedly provided at one end of the support rod (22) away from the motor (12), a second gear (21) is meshed with the first gear (23), a bevel gear (19) is installed on the inner side of the second gear (21), a third gear (20) is meshed with the bevel gear (19), a long rod (10) is fixedly sleeved in the third gear (20), the long rod (10) passes through the intermediate tube (8) and the rotating tube (7) and is fixedly connected to the mounting tube (5).

2. A handheld impact drill and impact mechanism thereof according to claim 1, characterized in that: A sleeve (9) is fixedly provided in the middle tube (8), and the long rod (10) is rotatably inserted in the sleeve (9). Adjustment clamps (39) are uniformly provided on the inner wall of the mounting tube (5) at equal angles, and a drill rod (6) is clamped and installed between a plurality of the adjustment clamps (39).

3. A handheld impact drill and its impact mechanism according to claim 2, characterized in that: A vertical plate (11) is fixedly provided in the shell (1), the vertical plate (11) is fixedly provided at the bottom of the shell (1), a motor (12) is fixedly provided on the inner wall of the upper end of the vertical plate (11), a first reinforcing block (13) is fixedly provided on the outer wall of the vertical plate (11), a second reinforcing block (14) is fixedly provided on the inner wall of the lower end of the vertical plate (11), and the bottoms of the first reinforcing block (13) and the second reinforcing block (14) are both fixedly provided on the bottom of the shell (1).

4. A handheld impact drill and impact mechanism thereof according to claim 3, characterized in that: A rotating rod (16) is fixedly provided on the outer side of the second gear (21), and one end of the rotating rod (16) away from the second gear (21) is rotatably connected to a support block (15), and the support block (15) is fixedly provided on the bottom of the housing (1).

5. A handheld impact drill and impact mechanism thereof according to claim 4, characterized in that: A connecting block (17) is fixedly provided on the inner side of the second gear (21), a round block (18) is fixedly provided on one end of the connecting block (17) away from the second gear (21), and an end of the round block (18) away from the connecting block (17) is fixedly connected to the bevel gear (19).

6. A handheld impact drill and impact mechanism thereof according to claim 5, characterized in that: The outer wall of the rotating tube (7) is fixedly provided with a plurality of anti-slip protrusions (41) in an equiangular ring shape. The anti-slip protrusions (41) are arranged in a long strip shape. The thickness of the anti-slip protrusions (41) is 0.4-0.8 cm. A display screen (38) is embedded in the side wall of the shell (1). The display screen (38) is electrically connected to the CPU controller.

7. A handheld impact drill and impact mechanism thereof according to claim 6, characterized in that: A handle (2) is fixedly provided at the bottom of the housing (1), a power board (3) is fixedly provided at the bottom of the handle (2), a charging base (4) is provided below the power board (3), a card slot (24) is installed at the top of the charging base (4), and the power board (3) is card-mounted in the card slot (24) to connect to the power supply.

8. The handheld electric impact drill and its impact mechanism according to claim 7, characterized in that: Both sides of the bottom of the power connection board (3) and both sides of the top of the card slot (24) are provided with mounting grooves (25), a terminal (26) is fixedly provided in the mounting groove (25), a slot (30) is provided on the side wall of the terminal (26), a power connection pole (27) is inserted and installed in the slot (30), and an electric wire (29) is fixedly provided between two longitudinally arranged power connection poles (27).

9. The handheld impact drill and impact mechanism thereof according to claim 8, characterized in that: A pull rod (28) is fixedly provided on one side of the bottom of the power connection rod (27), and the pull rod (28) is arranged in a circular shape. Buffer clamp mechanisms are respectively provided on both sides of the slot (30), and the buffer clamp mechanism is used to clamp and fix the power connection rod (27). The buffer clamp mechanism includes a groove (31), and a clamping block part (37) is movably provided in the groove (31). The clamping block part (37) includes a first clamping block (36), and the longitudinal section of the first clamping block (36) is arranged in a right-angled trapezoid. A second clamping block (35) is fixedly provided on the top of the first clamping block (36). A buffer block (34) is fixedly provided at the bottom of the groove (31), and the buffer block (34) is fixedly connected to the clamping block part (37).

10. The handheld electric impact drill and impact mechanism thereof according to claim 9, characterized in that: The longitudinal section of the second clamping block (35) is rectangular, and a telescopic rod (32) is fixedly provided on the inner wall of each of the first clamping block (36) and the second clamping block (35). One end of the telescopic rod (32) away from the clamping block portion (37) is fixedly provided on the inner wall of the groove (31), and a buffer spring (33) is sleeved on the telescopic rod (32).

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