Three-function lithium battery heavy electric hammer

Abstract

The utility model belongs to the technical field of electric tools, and discloses a three-function lithium battery heavy electric hammer, which is characterized in that an eccentric pin is arranged at the tail part of a shell, and the eccentric pin is propped against the edge of a switching bearing; one surface of the switching bearing is provided with a spring groove and the other surface is provided with a bulge; a spring I is arranged in the spring groove and is propped against the rotating bearing I; an eccentric wheel shaft is mounted in the rotating bearing I; the eccentric wheel shaft penetrates through the spring I, the switching bearing and the transmission gear I; the eccentric wheel shaft is connected with the switching bearing through a key; the bulge is clamped with a groove in the transmission gear I; the rotating bearing I is fixed in a bearing hole I in the shell; the transmission gear I is in meshing transmission with a transmission gear II through an intermediate gear; the intermediate gear is rotationally installed on the cover plate. The transmission gear II is meshed with the intermediate gear, the intermediate gear is meshed with the transmission gear I, the transmission gear I is matched with the switching bearing, the switching bearing is shifted through the eccentric pin, and transmission of the motor to the eccentric wheel is controlled, so that the electric hammer has the function of an electric drill.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric tools, concretely is three function lithium electricity heavy -duty electric hammer. BACKGROUND

[0002] Electric tools are roughly divided into two categories of indoor home and outdoor industry, and are various, such as electric drill is suitable for drilling operation, electric hammer is good at breaking hard material, electric saw is used for sawing various materials, and grinding machine is focused on grinding and polishing.Electric hammer is increased with a piston of crank connecting rod driven by motor in the basis of electric drill, and the piston is reciprocated in a cylinder to compress air, and the air pressure in the cylinder is periodically changed, and the changed air pressure drives the hammer in the cylinder to reciprocate and strike the top of drill bit, which is equivalent to hitting drill bit with hammer, and the function of hammer drill is realized, but the function of drilling cannot be realized alone, and the function is less.

[0003] The multifunctional electric hammer disclosed in the related reference CN112109045A sets impact piece and piston in cylinder, and the piston is driven by crank shaft, and the crank shaft is driven by intermediate gear and motor, and it can only realize two functions of hammer drill and hammer, and the function is less. SUMMARY

[0004] The utility model provides a three function lithium electricity heavy -duty electric hammer that increases the function of drilling.

[0005] In order to solve above technical problem, the utility model provides three function lithium electricity heavy -duty electric hammer, including the shell, and the motor, impact piece and piston set up in the shell, the eccentric pin is installed in the tail part of shell, and the edge of eccentric pin and switching bearing abuts;Spring groove is set up in one side of switching bearing, and the other side is provided with convex;Spring I is arranged in spring groove, and spring I and rotating bearing I abut;Eccentric wheel shaft is installed in rotating bearing I;Eccentric wheel shaft passes through spring I, switching bearing and transmission tooth I;Eccentric wheel shaft and switching bearing are connected through key;Convex and recess on transmission tooth I are engaged;Rotating bearing I is fixed in bearing hole I in the shell;Transmission tooth I is engaged transmission through intermediate gear and transmission gear II;Intermediate gear is rotatably installed on cover plate.

[0006] Through adopting above technical scheme, transmission gear II and intermediate gear are engaged, intermediate gear and transmission tooth I are engaged, transmission tooth I is matched with switching bearing, switching bearing is driven by eccentric pin, the transmission of motor to eccentric wheel is controlled, and the function of drilling is added to electric hammer.

[0007] Preferably, the transmission tooth part of eccentric wheel shaft is provided with a stop washer groove, the transmission tooth I is positioned on the eccentric wheel shaft through the snap spring on both sides, and the eccentric wheel shaft outer wall and the transmission tooth part inner wall have a gap.

[0008] Through adopting above technical scheme, the transmission tooth I is prevented from axial movement, and the engagement transmission of intermediate gear and transmission tooth I is stable.

[0009] Preferably, the eccentric pin is installed in the hole of the tail of the casing through the sealing ring, and a screw hole is drilled in the flat pin rod of the eccentric pin, and the knob I is fixedly connected with the pin rod through the screw.

[0010] By adopting the above technical scheme, the eccentric pin is installed in the hole of the tail of the casing through the sealing ring, so that the position of the eccentric pin in the casing is stable and not easy to loosen due to external force or vibration. The knob I is fixedly connected with the pin rod of the eccentric pin through the screw, which is convenient for assembly.

[0011] Preferably, the eccentric shaft is rotatably installed in the shaft seat of the cover plate of the casing.

[0012] By adopting the above technical scheme, the eccentric shaft is fixed in the shaft seat, which ensures the stability of the eccentric shaft during rotation.

[0013] Preferably, the transmission gear II and the transmission tooth I are respectively located on both sides of the intermediate gear.

[0014] By adopting the above technical scheme, the transmission gear II and the transmission tooth I are respectively designed on both sides of the intermediate gear, which can shorten the transmission path, ensure smooth rotation, and make the mechanical structure more compact.

[0015] Preferably, the intermediate gear is installed at the top end of the intermediate gear shaft, and the intermediate gear shaft is connected with the rotor of the motor.

[0016] By adopting the above technical scheme, only the motor transmission can realize the functions of drilling, hammering and drilling and hammering. This design greatly simplifies the operation process, and the user can switch between different functions without changing or adjusting additional mechanical parts.

[0017] Preferably, the intermediate gear and the transmission gear II cooperate, the transmission gear II is fixedly assembled on the bevel gear shaft, the bevel gear is installed at the top end of the bevel gear shaft, the bevel gear shaft is fixed in the rotating bearing II, and the rotating bearing II is fixed in the bearing hole II of the casing; the bevel gear cooperates with the transmission gear III.

[0018] By adopting the above technical scheme, the intermediate gear and the transmission gear II mesh, the transmission gear II is fixedly assembled with the bevel gear shaft, and the transmission efficiency is ensured. The bevel gear cooperates with the transmission gear III, the engagement surface is large, and the transmission efficiency is high.

[0019] Preferably, the eccentric shaft has a slot with a key embedded on it, and a key groove is formed on the shaft hole wall of the switching bearing; the eccentric shaft and the switching bearing are connected through the key.

[0020] By adopting the above technical scheme, the key connection can effectively transmit the torque on the eccentric shaft to the switching bearing, thereby efficiently driving the eccentric wheel to move the piston.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] 1. The utility model discloses transmission gear II 1 and intermediate gear mesh, intermediate gear and transmission tooth I mesh, transmission tooth I is matched with switching bearing, switching bearing is driven through eccentric pin, and the transmission of control motor to eccentric wheel makes electric hammer increase the function of drilling.

[0023] 2. The utility model discloses intermediate gear is installed at intermediate gear shaft top, and intermediate gear shaft is connected with the rotor of motor, and transmission tooth I is driven through the mesh of intermediate gear and transmission gear II, only needs motor drive to realize the function of drilling, the function of hammer and the function of hammer and drilling, and this design greatly simplifies the operation process, and user can switch between different functions without replacing or adjusting additional mechanical parts.

[0024] 3. The utility model discloses transmission gear II, transmission tooth I is designed at two sides of intermediate gear respectively, can shorten transmission path, ensures the rotation of stable simultaneously, makes mechanical structure more compact. DRAWINGS

[0025] Figure 1 It is the structural drawing of the utility model;

[0026] Figure 2 It is the partial enlarged view of the utility model;

[0027] Figure 3 It is the eccentric pin of the utility model

[0028] Figure 4 It is the eccentric wheel axle of the utility model

[0029] Figure 5 It is the switching bearing structure schematic drawing of the utility model;

[0030] Figure 6 It is the switching bearing plan view of the utility model;

[0031] Figure 7 It is transmission tooth I plan view of the utility model;

[0032] Figure 8 It is the recessed groove schematic drawing of transmission tooth I of the utility model.

[0033] Drawing numbers: 1. Housing, 2. Rotor, 3. Toggle I, 4. Transmission gear I, 5. Switching bearing, 6. Sleeve, 7. Rotating bearing I, 8. Eccentric wheel shaft, 9. Eccentric wheel, 10. Limiting ring, 11. Bevel gear shaft, 12. Bevel gear, 13. Transmission gear II, 14. Transmission gear III, 15. Rotating bearing II, 16. Spring I, 17. Impact component, 18. Piston, 19. Cover plate, 20. Eccentric pin, 21. Keyway, 22. Spring groove, 23. Protrusion, 24. Slot, 25. Groove, 26. Bearing hole I, 27. Intermediate gear, 28. Intermediate gear shaft, 29. Bearing hole II, 30. Ring groove, 31. Retaining ring groove, 32. Connecting rod, 33. Electric hammer head. Detailed Implementation

[0034] like Figure 1 As shown, a three-function lithium-ion heavy-duty electric hammer includes a housing 1, and a motor, an impact component 17, and a piston 18 disposed within the housing 1. An eccentric pin 20 is mounted at the rear of the housing 1, and the eccentric pin 20 abuts against the edge of a switching bearing 5. Figure 5 As shown, the switching bearing 5 has a spring groove 22 on one side and a protrusion 23 on the other side. A spring I 16 is installed in the spring groove 22, and the spring I 16 abuts against the rotating bearing I 7. An eccentric wheel shaft 8 is installed in the rotating bearing I 7, and an eccentric wheel 9 is installed at the top of the eccentric wheel shaft 8. A connecting rod 32 is fitted onto the eccentric pin on the top surface of the eccentric wheel 9, and the connecting rod 32 and the piston 18 are rotatably connected together by a pin. The rotating bearing I 7, spring I 16, switching bearing 5, and transmission gear I 4 are sequentially installed on the eccentric wheel shaft 8. The eccentric wheel shaft 8 passes through the spring I 16, the switching bearing 5, and the transmission gear I 4. The eccentric wheel shaft 8 and the switching bearing 5 are connected by a key. One side of the transmission gear I 4 has a groove 25, such as... Figure 7 , 8 As shown. The protrusion 23 engages with the groove 25 on the transmission gear I4. The rotating bearing I7 is fixed in the bearing hole I26 inside the housing 1. The transmission gear I4 is driven by the meshing of the intermediate gear 27 and the transmission gear II13. The intermediate gear 27 is rotatably mounted on the cover plate 19, and it meshes with the transmission gear II13. In this application, the transmission gear II13 meshes with the intermediate gear 27, and the intermediate gear 27 meshes with the transmission gear I4. The transmission gear I4 cooperates with the switching bearing 5. The switching bearing 5 is moved by the eccentric pin 20, controlling the motor's transmission to the eccentric wheel 9, thus adding a drilling function to the electric hammer.

[0035] Transmission gear II13 and transmission gear I4 are located on both sides of intermediate gear 27, respectively. The design of transmission gear II13 and transmission gear I4 on both sides of intermediate gear 27 can shorten the transmission path, ensure smooth rotation, and make the mechanical structure more compact.

[0036] The intermediate gear 27 is installed at the top end of the intermediate gear shaft 28, which is connected with the rotor 2 of the motor. The transmission tooth I 4, the intermediate gear 27 and the transmission gear II 13 are meshed and driven. The motor is powered by a lithium battery. Only the motor drive can realize the functions of drilling, hammering and drilling and hammering. This design greatly simplifies the operation process, and the user can switch between different functions without the need to replace or adjust additional mechanical parts.

[0037] The intermediate gear 27 and the transmission gear II 13 are matched, the transmission gear II 13 is fixedly assembled on the bevel gear shaft 11, the bevel gear shaft 11 is installed at the top end of the bevel gear 12, the bevel gear shaft 11 is fixed in the rotating bearing II 15, and the rotating bearing II 15 is fixed in the bearing hole II 29 of the shell 1; the bevel gear 12 is matched with the transmission gear III 14. The intermediate gear 27 and the transmission gear II 13 are meshed, the transmission gear II 13 is fixedly assembled with the bevel gear shaft 11, and the high transmission efficiency is ensured. The bevel gear 12 is matched with the transmission gear III 14, the engagement surface is large, and the transmission efficiency is high.

[0038] As shown in Figure 3 , the eccentric pin 20 is installed in the hole of the tail of the shell 1 through the sealing ring, the flat pin rod of the eccentric pin 20 is drilled with a screw hole, and the knob 3 is fixedly connected with the pin rod through a screw. The eccentric pin 20 is installed in the hole of the tail of the shell 1 through the sealing ring, so that the position of the eccentric pin 20 in the shell 1 is stable and not easy to loosen due to external force or vibration. The knob 3 is fixedly connected with the pin rod of the eccentric pin 20 through a screw, which is convenient to assemble. Turning the knob 3, the flat pin rod rotates, the eccentric pin 20 lifts the switching bearing 5, the switching bearing 5 is separated from the transmission tooth I 4, the transmission tooth I 4 idles and does not drive the transmission tooth to rotate.

[0039] As shown in Figure 4 , the transmission gear part of the eccentric shaft 8 is provided with a check ring groove 31, the transmission tooth I 4 is positioned on the eccentric shaft 8 through a snap spring on both sides, and the outer wall of the eccentric shaft 8 and the inner wall of the transmission gear part have a gap. The transmission tooth I 4 is prevented from moving axially, and the meshing transmission of the intermediate gear 27 and the transmission tooth I 4 is stable. The tail of the eccentric shaft 8 is rotatably installed in the shaft seat of the cover plate 19 of the shell 1. By fixing the tail of the eccentric shaft 8 in the shaft seat, the stability of the eccentric shaft 8 during rotation is ensured.

[0040] The eccentric shaft 8 has a slot hole 24 with an embedded key, and the shaft hole wall of the switching bearing 5 is provided with a key groove 21, as shown in Figure 6 . The eccentric shaft 8 and the switching bearing 5 are connected by the key. The key connection can effectively transmit the torque on the eccentric shaft 8 to the switching bearing 5, thereby efficiently driving the eccentric wheel 9 to move the piston 18.

[0041] An eccentric pin, not shown in the figure, is also installed on the side of the casing 1, and the eccentric pin is fixedly connected with the knob 2. The eccentric pin is clamped in the ring groove 30. The ring groove 30 is arranged on the back tooth surface of the transmission gear 3 14. The impact piece 17 and the piston 18 are installed in the sleeve 6, the sleeve 6 is rotatably installed in the casing 1, and the casing 1 is provided with the limiting ring 10 for limiting the spring. The sleeve end is telescopically installed with the electric hammer head 33.

[0042] In operation, the knob 2 is turned to make the transmission gear 3 14 engage with the bevel gear 12, and the knob 3 is turned to make the transmission tooth 4 disengage with the switching bearing 5. The motor drives the transmission gear 3 14 to rotate, and the transmission tooth 4 is idling without transmission, so that the drilling function is realized. The knob 2 is turned to make the transmission gear 3 14 disengage with the bevel gear 12, and the knob 3 is turned to make the transmission tooth 4 engage with the switching bearing 5. The motor drives the eccentric shaft 8 to rotate, and the piston 18 moves to drive the impact piece 17 to impact, so that the hammer function is realized. The knob 2 is turned to make the transmission gear 3 14 engage with the bevel gear 12, and the knob 3 is turned to make the transmission tooth 4 engage with the switching bearing 5. The motor drives the eccentric shaft 8 to rotate, and the piston 18 moves to drive the impact piece 17 to impact. At the same time, the transmission gear 3 14 rotates, so that the hammer drilling function is realized.

[0043] It should be understood by those skilled in the art that the above description and the embodiments of the utility model shown in the drawings are only examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structural principle of the utility model have been shown and explained in the embodiments, and the embodiments of the utility model can be any deformation or modification without departing from the principle.

Claims

1. A three-function lithium battery heavy-duty electric hammer, comprising a casing (1), and a motor, an impact piece (17) and a piston (18) arranged in the casing (1), characterized in that: The eccentric pin (20) is installed at the tail of the casing (1) and abuts against the edge of the switching bearing (5); the switching bearing (5) is provided with a spring slot (22) on one side and a protrusion (23) on the other side; the spring I (16) is arranged in the spring slot (22) and abuts against the rotating bearing I (7); the eccentric wheel shaft (8) is installed in the rotating bearing I (7); the eccentric wheel shaft (8) passes through the spring I (16), the switching bearing (5) and the transmission tooth I (4); the eccentric wheel shaft (8) is connected with the switching bearing (5) through a key; the protrusion (23) is engaged with the recess (25) on the transmission tooth I (4); the rotating bearing I (7) is fixed in the bearing hole I (26) in the casing (1); the transmission tooth I (4) is driven through the meshing of the intermediate gear (27) and the transmission gear II (13); the intermediate gear (27) is rotatably installed on the cover plate (19).

2. The three-function lithium electric heavy-duty hammer as recited in claim 1, wherein: The transmission tooth part of the eccentric wheel shaft (8) is provided with a stop ring slot, the transmission tooth I (4) is positioned on the eccentric wheel shaft (8) through a snap spring on two sides, and the outer wall of the eccentric wheel shaft (8) has a gap with the inner wall of the transmission tooth part.

3. The three-function lithium electric heavy-duty hammer of claim 1 wherein: The eccentric pin (20) is installed in the hole of the tail of the casing (1) through a sealing ring, a screw hole is drilled in the flat pin rod of the eccentric pin (20), and the knob I (3) is fixedly connected with the pin rod through a screw.

4. The three-function lithium electric heavy-duty hammer of claim 2 wherein: The eccentric wheel shaft (8) is rotatably installed in the shaft seat of the cover plate (19) of the casing (1).

5. The three-function lithium-ion heavy-duty electric hammer according to claim 1, characterized in that: The transmission gear II (13) and the transmission tooth I (4) are respectively located on the two sides of the intermediate gear (27).

6. The three-function lithium battery-powered heavy-duty hammer as claimed in claim 5, wherein: The intermediate gear (27) is installed at the top end of the intermediate gear shaft (28), and the intermediate gear shaft (28) is connected with the rotor (2) of the motor.

7. The three-function lithium electric heavy-duty hammer as recited in claim 6, wherein: The intermediate gear (27) cooperates with the transmission gear II (13), the transmission gear II (13) is fixedly assembled on the bevel gear shaft (11), the bevel gear shaft (11) is provided with a bevel gear (12) at the top end, the bevel gear shaft (11) is fixed in the rotating bearing II (15), the rotating bearing II (15) is fixed in the bearing hole II (29) of the casing (1); the bevel gear (12) cooperates with the transmission gear III (14).

8. The three-function lithium electric heavy-duty hammer of claim 4, wherein: The eccentric wheel shaft (8) is provided with a slot hole (24) in which a key is embedded, and the shaft hole wall of the switching bearing (5) is provided with a key groove (21); the eccentric wheel shaft (8) is connected with the switching bearing (5) through the key.

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