An electric impact drill with integrated structure

Abstract

The present invention belongs to the technical field of impact drills, and in particular to an electric impact drill with an integrated structure. Aiming at the problem that the two-stage pure compressed air driving method in the prior art easily leads to the problem of inadequate return stroke and then no-load and empty hammer, the following scheme is proposed, including a C-shaped slot frame for fixing the integrated structure, the opening of the C-shaped slot frame is downward, a horizontally arranged support plate seat is fixed at the bottom opening of the C-shaped slot frame, a sliding bearing is fixed to the inner wall of the C-shaped slot frame near the drill end, and an impact sleeve is slidably connected in the sliding bearing, and a connecting sleeve rod and a hexagonal slot hole are reserved at both ends of the impact sleeve respectively; the hexagonal slot hole faces the inside of the C-shaped slot frame. In the present invention, when the kinetic energy of the impact is consumed, it will quickly return to its original position under the action of the reset spring, and receive the next impact again, which can ensure the stability of the impact frequency, and then allow the impact force to be more efficiently transmitted to the impact sleeve.

Description

Technical Field

[0001] The invention relates to the technical field of impact drills, and in particular to an electric impact drill with an integrated structure. Background Art

[0002] An impact drill bit is a device that is clamped on an impact electric drill and is used to drill holes in concrete foundations, walls, brick walls, and granite so that fasteners such as expansion bolts and plastic expansion tubes can be installed in the holes. An impact drill bit is required when the user drills holes in the walls of a building.

[0003] The impact drills currently used often adopt an impact method of pushing the middle striker when in use. Both ends of the striker are set as sealed cavities. Once one end of the striker is rapidly compressed, it will quickly push the striker to the other end, thereby forming an impact. This impact method will lead to untimely reset due to the weakened return sealing performance of the impact end, thereby forming a no-load and empty impact situation. Therefore, we propose a new integrated structure that can avoid the incomplete return and an electric impact drill with it. Summary of the invention

[0004] In view of the technical problem that the two-stage pure compressed air driving method in the prior art easily leads to an incomplete return stroke and then produces an empty hammer, the present invention adopts the following technical solution:

[0005] An electric impact drill with an integrated structure comprises a C-shaped slot frame for fixing the integrated structure, the opening of the C-shaped slot frame is downward, a horizontally arranged support plate seat is fixed at the bottom opening of the C-shaped slot frame, a sliding bearing is fixed to the inner wall of the C-shaped slot frame near the drill bit end, and an impact sleeve is slidably connected in the sliding bearing, and a connecting sleeve rod and a hexagonal slot hole are reserved at both ends of the impact sleeve respectively; the hexagonal slot hole faces the inside of the C-shaped slot frame, and a double-row circular rod coaxial with the sliding bearing is also embedded near the top of the C-shaped slot frame. A tapered roller bearing, and a double-row tapered roller bearing is rotatably connected with a rotating sleeve inserted into the hexagonal slot hole; connecting rods are fixed on opposite sides of the C-shaped slot frame, and the same explosion-proof tube extending into the impact sleeve is fixed between the two connecting rods; a prismatic impact rod is slidably connected to one end of the circumferential inner wall of the explosion-proof tube close to the impact sleeve, and a prismatic sliding hole is reserved at one end of the explosion-proof tube close to the prismatic impact rod, a reset spring is fixed at one end of the prismatic sliding hole close to the center of the tube, and an impact block is fixed at the end of the reset spring.

[0006] Preferably, a one-way air intake valve is embedded in the outer wall of the explosion-proof tube near the end of the prismatic sliding hole; and a cylindrical rotating groove is opened at one end of the impact sleeve near the explosion-proof tube, and a gap is left between the circumferential inner wall of the cylindrical rotating groove and the end of the one-way air intake valve.

[0007] Preferably, a limiting ring is clamped near the middle of the circumferential inner wall of the explosion-proof tube, and the inner diameter of the limiting ring is smaller than the diameter of the impact block, so as to block the position of the impact block; the cavity where the limiting ring is located is an active pressure impact chamber, and an active impact block is slidably connected in the active pressure impact chamber, and a connecting rod is hinged at one end of the active impact block away from the impact block; a convex cone is reserved at one end of the active impact block close to the impact block; piston rings are sleeved on the circumferential outer walls of the active impact block and the impact block; the limiting ring can be avoided from touching during impact.

[0008] Preferably, a wear-resistant steel ring is sleeved on one end of the circumferential outer wall of the explosion-proof tube close to the prismatic impact rod, and the circumferential outer wall of the wear-resistant steel ring forms a sliding fit with the circumferential inner wall of the cylindrical rotating groove; an anti-slip disc is reserved at one end of the prismatic impact rod close to the impact sleeve, and a tightening rotating block is screwed at the bottom of the cylindrical rotating groove for tightening the anti-slip disc but not affecting the rotation of the impact sleeve as a whole on the outer wall of the anti-slip disc; this ensures that the reciprocating impact from the prismatic impact rod can be converted into the reciprocating impact motion of the impact sleeve, and can also ensure the independent rotation of the impact sleeve.

[0009] Preferably, a plurality of spring ear plates distributed symmetrically in the center are fixed to one end of the six-side outer walls of the prismatic impact rod close to the anti-slip disc, and a reset spring is arranged between the spring ear plate and the end of the explosion-proof tube; the impact sleeve can be quickly reset after the impact, waiting for the next impact of the impact block.

[0010] Preferably, a plurality of roller grooves are formed on the outer wall of the explosion-proof tube at one end of the prismatic sliding hole, and rollers are rotatably connected in the roller grooves, and the surfaces of the rollers are rollingly connected to the outer wall of the prismatic impact rod.

[0011] Preferably, a crossbeam frame is fixed to one end of the vertical inner walls on both sides opposite to the C-shaped groove frame, which is away from the sliding bearing, and the crossbeam frame is located on the lower surface of the explosion-proof tube, an anti-fall bearing is embedded in the middle of the crossbeam frame, and a balancing shaft is rotatably connected in the anti-fall bearing, and a rotating wheel and a second bevel gear are fixed to the upper and lower ends of the balancing shaft respectively, a rotating shaft is fixed to the top of the rotating wheel near the circumferential edge, and a rotating shaft forms a rotating connection with the other end of the connecting rod; the rapid reciprocating motion of the active impact block can be achieved by controlling the rotation of the second bevel gear in coordination with the setting of the connecting rod.

[0012] Preferably, a bearing hole is opened in the middle of the support plate seat, and an anti-slip bearing is embedded in the bearing hole, a short shaft is rotatably connected in the anti-slip bearing, and a driven gear 1 is fixed to the top of the short shaft, and the side of the rotating sleeve is reserved with helical teeth that mesh with the driven gear 1; two side rib plates parallel to each other are fixed to one end of the bottom end of the C-shaped slot frame close to the crossbeam frame, and the same main motor is fixed between the two side rib plates, a driving gear is fixed to the top of the output shaft of the main motor through the support plate seat, and the driving gear is meshed with the driven gear 1 and the helical gear 2 at the same time; the diameter of the driving gear is smaller than the diameter of the driven gear 1 and the helical gear 2, and the driving gear is located on the center line of the two, which plays a role of being squeezed and stabilized, thereby improving the output stability.

[0013] Preferably, the same angle steel pull rod is fixed between the bottom ends of the two side ribs to play a reinforcing role, and the same handle rib with a C-shaped structure is fixed between the side of the angle steel pull rod and the top of the C-shaped channel frame; an internal threaded tube is welded on the side of the C-shaped channel frame, and an auxiliary handle is threaded in the internal threaded tube, and a sealing plate is fixed to the end of the C-shaped channel frame close to the sliding bearing to prevent lubricating oil from dripping.

[0014] Preferably, a drill bit holder is fixed to one end of the connecting sleeve rod away from the C-shaped slot frame, and shells that can be put together are respectively fixed to the front and back of the C-shaped slot frame; the shell also wraps the handle ribs; an auxiliary plate frame is also embedded on the support plate seat; self-locking screw holes are opened in the auxiliary plate frame, and the size of the self-locking screw holes is adapted to the auxiliary handle, and the outer walls of the two side ribs are fixed with the same motor cover, so that the auxiliary handle can be fixed to the bottom of the device.

[0015] The beneficial effects of the present invention are:

[0016] 1. By setting a return spring between the end of the prismatic sliding hole and the impact block, when the other end of the impact block is impacted, it will quickly slide to the end of the prismatic impact rod, thereby causing a collision. After the kinetic energy of the impact is consumed, it will quickly return to its original position under the action of the return spring and receive the next impact again, thereby ensuring the stability of the impact frequency and allowing the impact force to be more efficiently transmitted to the impact sleeve.

[0017] 2. By setting a one-way air inlet valve on the outer wall of the explosion-proof tube near the prism sliding hole, the internal air can be quickly replenished to balance the air pressure when the impact block returns after impact, ensuring that the impact block can quickly return to its original position.

[0018] 3. By setting a roller embedded in the outer wall of the explosion-proof tube, the friction resistance between the surface of the prismatic impact rod and the inner wall of the explosion-proof tube is reduced, thereby increasing the efficiency of the transmission of the impact force and reducing the loss, ensuring that the prismatic impact rod can be quickly reset to wait for the next impact, and ensuring the stability and reliability of the impact frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the installation structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the internal driving structure in the present invention;

[0021] Figure 3 It is a schematic diagram of the overall structure of the reciprocating impact mechanism of the present invention;

[0022] Figure 4 A schematic diagram of the half-section structure of the impact sliding tube and the rotating sleeve in the present invention

[0023] Figure 5 It is a schematic diagram of the half-section explosion structure of the explosion-proof tube in the present invention;

[0024] Figure 6 It is a structural schematic diagram of the framework in the present invention;

[0025] Figure 7 An exploded view of the frame of the present invention;

[0026] Figure 8 It is an overall exploded view of the present invention;

[0027] Fig. 9 It is the overall appearance diagram of the present invention.

[0028] In the figure: 1, C-shaped slot frame; 2, explosion-proof tube; 201, prismatic sliding hole; 202, roller groove; 3, rotating sleeve; 4, double-row tapered roller bearing; 5, sliding bearing; 6, impact sliding sleeve; 601, tightening rotating block; 7, connecting sleeve rod; 701, drill bit holder; 8, auxiliary plate frame; 9, driven gear 1; 10, anti-slip bearing; 11, driving gear; 12, main motor; 13, side rib plate; 14, support plate seat; 141, bearing hole; 15, crossbeam frame; 16, rotating wheel ; 17. Connecting rod; 18. Bevel gear 2; 19. Balance shaft; 20. One-way intake valve; 21. Roller; 22. Wear-resistant steel ring; 23. Reset spring; 24. Prismatic impact rod; 2401. Anti-slip disc; 2402. Spring ear plate; 25. Active impact block; 26. Impact block; 27. Reset spring; 28. Piston ring; 29. ​​Internal threaded pipe; 30. Handle rib; 31. Angle steel pull rod; 32. Closing plate; 33. Housing; 34. Auxiliary handle; 35. Motor cover. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] In this embodiment, refer to Figure 1-9 , an electric impact drill with an integrated structure, comprising a C-shaped slot frame 1 for fixing the integrated structure, the opening of the C-shaped slot frame 1 is downward and the top inner wall is reserved with an arc groove for clamping the bearing, a horizontally arranged support plate seat 14 is fixed at the bottom opening of the C-shaped slot frame 1, a sliding bearing 5 is clamped and fixed to the inner wall of the C-shaped slot frame 1 near the drill bit end, and an impact sleeve 6 is slidably connected in the sliding bearing 5, and a connecting sleeve rod 7 and a hexagonal slot hole are reserved at both ends of the impact sleeve 6; the hexagonal slot hole faces the inside of the C-shaped slot frame 1, and a double-row tapered roller bearing 4 coaxial with the sliding bearing 5 is also embedded in the inside of the C-shaped slot frame 1 near the top, and a rotating sleeve 3 inserted into the hexagonal slot hole is rotatably connected in the double-row tapered roller bearing 4; the entire impact sleeve 6 can slide back and forth along its axis in the rotating sleeve 3, and the entire impact sleeve 6 and the rotating sleeve 3 remain radially stationary, that is, the rotating sleeve 3 The rotation can simultaneously drive the rotation of the impact sleeve 6; connecting rods are fixed on the opposite sides of the C-shaped slot frame 1, and the same explosion-proof tube 2 extending into the impact sleeve 6 is fixed between the two connecting rods; a prismatic impact rod 24 is slidably connected to one end of the circumferential inner wall of the explosion-proof tube 2 close to the impact sleeve 6, and a prismatic sliding hole 201 is reserved at one end of the explosion-proof tube 2 close to the prismatic impact rod 24, and a return spring 27 is fixed at one end of the prismatic sliding hole 201 close to the center of the tube, and an impact block 26 is fixed at the end of the return spring 27; when the other end of the impact block 26 is impacted, it will quickly slide to the end of the prismatic impact rod 24, thereby causing a collision. After the kinetic energy of the impact is consumed, it will quickly return to its original position under the action of the return spring 27, and receive the next impact again, ensuring the stability of the impact frequency, and then allowing the impact force to be more efficiently transmitted to the impact sleeve 6.

[0031] Reference Figure 4 A one-way air intake valve 20 is embedded in the outer wall of the explosion-proof tube 2 near the end of the prismatic sliding hole 201; and a cylindrical rotating groove is opened at the end of the impact sleeve 6 near the explosion-proof tube 2, and a gap is left between the circumferential inner wall of the cylindrical rotating groove and the end of the one-way air intake valve 20; when the impact block 26 returns after the impact, the internal air can be quickly replenished to balance the air pressure, ensuring that the impact block 26 can quickly return to its original position.

[0032] In the present invention, a limiting ring is clamped near the middle of the circumferential inner wall of the explosion-proof tube 2, and the inner diameter of the limiting ring is smaller than the diameter of the impact block 26, so as to block the position of the impact block 26; the cavity where the limiting ring is located is an active pressure impact chamber, and an active impact block 25 is slidably connected in the active pressure impact chamber, and a connecting rod 17 is hinged at one end of the active impact block 25 away from the impact block 26; a convex cone is reserved at one end of the active impact block 25 close to the impact block 26; piston rings 28 are sleeved on the circumferential outer walls of the active impact block 25 and the impact block 26; the limiting ring can be avoided from touching during impact.

[0033] Reference Figure 3-4 The circumferential outer wall of the explosion-proof tube 2 is sleeved with a wear-resistant steel ring 22 at one end close to the prismatic impact rod 24, and the circumferential outer wall of the wear-resistant steel ring 22 forms a sliding fit with the circumferential inner wall of the cylindrical rotating groove; an anti-slip disc 2401 is reserved at one end of the prismatic impact rod 24 close to the impact sleeve 6, and a tightening rotating block 601 is screwed at the bottom of the cylindrical rotating groove to tighten the anti-slip disc 2401 but does not affect the overall rotation of the impact sleeve 6 on the outer wall of the anti-slip disc 2401; it ensures that the reciprocating impact from the prismatic impact rod 24 can be converted into the reciprocating impact motion of the impact sleeve 6, and can also ensure the independent rotation of the impact sleeve 6.

[0034] Reference Figure 5 A plurality of spring ears 2402 symmetrically distributed in the center are fixed to one end of the six-side outer walls of the prismatic impact rod 24 close to the anti-slip disc 2401, and a reset spring 23 is arranged between the spring ears 2402 and the end of the explosion-proof tube 2; the impact sleeve 6 can be quickly reset after the impact to wait for the next impact of the impact block 26.

[0035] Reference Figure 4-5 The outer wall of the explosion-proof tube 2 is located at one end of the prismatic sliding hole 201 and has a plurality of roller grooves 202, and a roller 21 is rotatably connected in the roller groove 202, and the surface of the roller 21 is rollingly connected to the outer wall of the prismatic impact rod 24, thereby reducing the friction resistance between the surface of the prismatic impact rod 24 and the inner wall of the explosion-proof tube 2, thereby increasing the efficiency of the transmission of the impact force and reducing the loss, ensuring that the prismatic impact rod 24 can be quickly reset to wait for the next impact, and ensuring the stability and reliability of the impact frequency.

[0036] Reference Figure 1 , Figure 6 and Figure 7A crossbeam frame 15 is fixed to one end of the vertical inner walls on both sides of the C-shaped groove frame 1 that are away from the sliding bearing 5, and the crossbeam frame 15 is located on the lower surface of the explosion-proof tube 2, and an anti-fall bearing is embedded in the middle of the crossbeam frame 15, and a balance shaft 19 is rotatably connected in the anti-fall bearing, and a rotating wheel 16 and a bevel gear 18 are fixed to the upper and lower ends of the balance shaft 19 respectively, and a rotating shaft is fixed to the top of the rotating wheel 16 near the circumferential edge, and the rotating shaft forms a rotational connection with the other end of the connecting rod 17; the rapid reciprocating motion of the active impact block 25 can be achieved by controlling the rotation of the bevel gear 18 and coordinating with the setting of the connecting rod 17.

[0037] Reference Figure 1-2 A bearing hole 141 is opened in the middle of the support plate seat 14, and an anti-slip bearing 10 is embedded in the bearing hole 141. A short shaft is rotatably connected in the anti-slip bearing 10, and a driven gear 9 is fixed on the top of the short shaft. The side of the rotating sleeve 3 is reserved with helical teeth that mesh with the driven gear 9; two parallel side rib plates 13 are fixed to one end of the bottom end of the C-shaped slot frame 1 close to the crossbeam frame 15, and the same main motor 12 is fixed between the two side rib plates 13. The top of the output shaft of the main motor 12 passes through the support plate seat 14 and is fixed with a driving gear 11, and the driving gear 11 is meshed with the driven gear 9 and the helical gear 2 18 at the same time; the diameter of the driving gear 11 is smaller than the diameter of the driven gear 9 and the helical gear 2 18, and the driving gear 11 is located on the center line between the two, which plays a role of being squeezed and stabilized, thereby improving the output stability.

[0038] Reference Figure 6-7 An angle steel pull rod 31 is fixed between the bottom ends of the two side ribs 13 to play a reinforcing role, and a handle rib 30 with a C-shaped structure is fixed between the side of the angle steel pull rod 31 and the top of the C-shaped channel frame 1; an internal threaded tube 29 is welded to the side of the C-shaped channel frame 1, and an auxiliary handle 34 is screwed into the internal threaded tube 29, and a sealing plate 32 is fixed to one end of the C-shaped channel frame 1 close to the sliding bearing 5 to prevent lubricating oil from dripping.

[0039] Reference Figure 1 , Figure 8-9 A drill bit holder 701 is fixed to one end of the connecting sleeve rod 7 away from the C-shaped slot frame 1, and a shell 33 that can be combined together is fixed to the front and back of the C-shaped slot frame 1 respectively; the shell 33 also wraps the handle ribs 30; an auxiliary plate frame 8 is also embedded on the support plate seat 14; a self-locking screw hole is opened in the auxiliary plate frame 8, and the size of the self-locking screw hole is adapted to the auxiliary handle 34, and the outer walls of the two side ribs 13 are fixed with the same motor cover 35, wherein the C-shaped slot frame 1, the handle ribs 30, the angle steel pull rod 31 and the two side ribs 13 constitute a frame, and the auxiliary handle 34 can be fixed to the bottom of the device.

[0040] When the device is in use, after the drill bit is installed on the drill bit holder 701, the main motor 12 can be started to start drilling. At this time, the active gear 11 drives the driven gear 19 and the bevel gear 2 18 to rotate at the same time. At this time, the wheel 16 at the top of the balance shaft 19 starts to rotate, which then drives the connecting rod 17 to run, and then drives the active impact block 25 slidably connected in the explosion-proof tube 2 to move quickly and squeeze the cavity to hit the impact block 26. When the other end of the impact block 26 is impacted, it will quickly slide to the end of the prismatic impact rod 24, and then cause an impact. After the kinetic energy of the impact is consumed, it will quickly return to its original position under the action of the reset spring 27, and receive the next impact again, ensuring the stability of the impact frequency, and then allowing the impact force to be more efficiently transmitted to the impact sleeve 6; at the same time, under the action of the mutually meshing rotating sleeve 3 and the driven gear 19, the impact slide 6 will also be driven to rotate, thereby achieving impact and rotation.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electric impact drill with an integrated structure, comprising a C-shaped slot frame (1) for fixing the integrated structure, It is characterized in that The opening of the C-shaped slot frame (1) faces downward, and a horizontally arranged support plate seat (14) is fixed at the bottom opening of the C-shaped slot frame (1). A sliding bearing (5) is fixedly connected to the inner wall of the C-shaped slot frame (1) near the drill bit end, and an impact sleeve (6) is slidably connected inside the sliding bearing (5). A connecting sleeve rod (7) and a hexagonal slot hole are reserved at both ends of the impact sleeve (6). The hexagonal slot hole faces the inside of the C-shaped slot frame (1), and a double-row tapered roller bearing (4) coaxial with the sliding bearing (5) is also embedded near the top of the C-shaped slot frame (1), and a rotating connection in the double-row tapered roller bearing (4) is provided. A rotating sleeve (3) is connected and inserted into the hexagonal slot hole; connecting rods are fixed on opposite sides of the C-shaped slot frame (1), and a same explosion-proof tube (2) extending into the impact sleeve (6) is fixed between the two connecting rods; a prismatic impact rod (24) is slidably connected to one end of the circumferential inner wall of the explosion-proof tube (2) close to the impact sleeve (6), and a prismatic sliding hole (201) is reserved at one end of the explosion-proof tube (2) close to the prismatic impact rod (24), a return spring (27) is fixed to one end of the prismatic sliding hole (201) close to the center of the tube, and an impact block (26) is fixed to the end of the return spring (27); A one-way air inlet valve (20) is embedded at the end of the outer wall of the explosion-proof tube (2) near the prismatic sliding hole (201); and a cylindrical rotating groove is formed at one end of the impact sliding sleeve (6) near the explosion-proof tube (2), and a gap is left between the circumferential inner wall of the cylindrical rotating groove and the end of the one-way air inlet valve (20); The end of the circumferential outer wall of the explosion-proof tube (2) close to the prismatic impact rod (24) is sleeved with a wear-resistant steel ring (22), and the circumferential outer wall of the wear-resistant steel ring (22) forms a sliding fit with the circumferential inner wall of the cylindrical rotating groove; the end of the prismatic impact rod (24) close to the impact sleeve (6) is reserved with an anti-slip disc (2401), and the bottom of the cylindrical rotating groove is screwed with a tightening rotary block (601) for tightening the anti-slip disc (2401) but not affecting the rotation of the impact sleeve (6) on the outer wall of the anti-slip disc (2401); A plurality of spring lugs (2402) distributed symmetrically in the center are fixed to one end of the six-side outer walls of the prismatic impact rod (24) close to the anti-slip disc (2401), and a return tension spring (23) is provided between the spring lugs (2402) and the end of the explosion-proof tube (2).

2. An electric impact drill with an integrated structure according to claim 1, It is characterized in that A limit ring is clamped near the middle of the circumferential inner wall of the explosion-proof tube (2), and the inner diameter of the limit ring is smaller than the diameter of the impact block (26) so as to block the position of the impact block (26); the cavity where the limit ring is located is an active pressure impact chamber, and an active impact block (25) is slidably connected in the active pressure impact chamber, and a connecting rod (17) is hinged at one end of the active impact block (25) away from the impact block (26); a convex cone is reserved at one end of the active impact block (25) close to the impact block (26); piston rings (28) are sleeved on the circumferential outer walls of the active impact block (25) and the impact block (26).

3. An electric impact drill with an integrated structure according to claim 2, It is characterized in that The outer wall of the explosion-proof tube (2) is provided with a plurality of roller grooves (202) at one end of the prismatic sliding hole (201), and rollers (21) are rotatably connected in the roller grooves (202), and the surfaces of the rollers (21) are rollingly connected to the outer wall of the prismatic impact rod (24).

4. An electric impact drill with an integrated structure according to claim 3, It is characterized in that A crossbeam frame (15) is fixed to one end of the vertical inner walls on opposite sides of the C-shaped groove frame (1) away from the sliding bearing (5), and the crossbeam frame (15) is located on the lower surface of the explosion-proof tube (2). An anti-fall bearing is embedded in the middle of the crossbeam frame (15), and a balance shaft (19) is rotatably connected in the anti-fall bearing, and a rotating wheel (16) and a second bevel gear (18) are respectively fixed to the upper and lower ends of the balance shaft (19), and a rotating shaft is fixed to the top of the rotating wheel (16) near the circumferential edge, and the rotating shaft forms a rotational connection relationship with the other end of the connecting rod (17).

5. An electric impact drill with an integrated structure according to claim 4, It is characterized in that A bearing hole (141) is formed in the middle of the support plate seat (14), and an anti-slip bearing (10) is embedded in the bearing hole (141). A short shaft is rotatably connected to the anti-slip bearing (10), and a driven gear 1 (9) is fixed to the top of the short shaft. The side surface of the rotating sleeve (3) is reserved with helical teeth that mesh with the driven gear 1 (9). Two parallel side ribs (13) are fixed to one end of the bottom end of the C-shaped slot frame (1) close to the crossbeam frame (15), and a main motor (12) is fixed between the two side ribs (13). A driving gear (11) is fixed to the top of the output shaft of the main motor (12) through the support plate seat (14), and the driving gear (11) meshes with the driven gear 1 (9) and the helical gear 2 (18) at the same time. The diameter of the driving gear (11) is smaller than the diameters of the driven gear 1 (9) and the helical gear 2 (18), and the driving gear (11) is located on the center line connecting the two.

6. An electric impact drill with an integrated structure according to claim 5, It is characterized in that A same angle steel tie rod (31) is fixed between the bottom ends of the two side rib plates (13) to play a reinforcing role, and a same handle rib (30) with a C-shaped structure is fixed between the side of the angle steel tie rod (31) and the top of the C-shaped channel frame (1); an internal threaded tube (29) is welded to the side of the C-shaped channel frame (1), and an auxiliary handle (34) is screwed into the internal threaded tube (29); a sealing plate (32) is fixed to one end of the C-shaped channel frame (1) close to the sliding bearing (5).

7. An electric impact drill with an integrated structure according to claim 6, It is characterized in that A drill bit holder (701) is fixed to one end of the connecting sleeve rod (7) away from the C-shaped slot frame (1), and shells (33) that can be put together are respectively fixed to the front and rear of the C-shaped slot frame (1); the shell (33) also wraps the handle ribs (30); an auxiliary plate frame (8) is also embedded on the support plate seat (14); a self-locking screw hole is opened in the auxiliary plate frame (8), and the size of the self-locking screw hole is adapted to the auxiliary handle (34); and the outer walls of the two side rib plates (13) are fixed with the same motor cover (35).

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