CN217728643U

CN217728643U - Charging electric hammer

Info

Publication number: CN217728643U
Application number: CN202221787322.1U
Authority: CN
Inventors: 成英; 李强
Original assignee: Nantong Xiyu Tools Co ltd
Current assignee: Nantong Xiyu Tools Co ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-11-04
Anticipated expiration: 2032-07-12

Abstract

The utility model discloses a rechargeable electric hammer, gear box including reciprocal anchorage, the motor upper bracket, a housing, a rotor, a stator, switch assembly on the handle, a control panel, the lithium cell package, gear box and motor upper bracket combination constitute lubricated cavity, correspond in the lubricated cavity and install impact slewing mechanism and power transmission mechanism, impact slewing mechanism includes the hammer stem, the rotating sleeve, towards the hammer, the gear wheel, a piston, the rotating sleeve rotationally sets up on the gear box, the front portion of rotating sleeve is equipped with the sealed felt of being connected with gear box sealing connection and is connected with the sliding sleeve, install hammer stem cover assembly through jump ring in the hammer stem cover in the rotating sleeve, power transmission mechanism connects and locates the chassis bottom. The utility model has good lubricating and oil leakage preventing effect, small abrasion and long service life; the overload protection mechanism can play a better overload protection role on the rechargeable electric hammer; the air exchange speed is high when the cylinder drives the piston to work; the whole mechanical transmission mechanism and the motor mechanism form a whole, and the assembling operation is convenient.

Description

Charging electric hammer

Technical Field

The utility model relates to an electric tool field, in particular to rechargeable electric hammer.

Background

The charging electric hammer is an electric tool which can drive the drill bit to rotate, can also hammer the drill bit in a reciprocating way and utilizes a direct current power supply to supply power, when the electric hammer works, the power transmission mechanism drives the large gear to rotate and drives the drill bit arranged on the sliding sleeve to rotate through the rotating sleeve, the power transmission mechanism drives the air cylinder to compress air in a reciprocating way so that the air pressure in the air cylinder is changed periodically, and the piston drives the hammer rod to impact the drill bit in a reciprocating way, so that the charging electric hammer is mainly used for drilling holes on concrete, floor slabs, brick walls and stone materials. The existing rechargeable electric hammer has the following problems in the using process: firstly, rotate the poor lubricating oil that causes of impact mechanism and power transmission mechanism leakproofness and leak, lead to lubricated effect poor, hammer stem sealing washer and piston seal circle wearing and tearing speed are big, and cylinder and piston reciprocating motion resistance is big, and life is short. Secondly, because rechargeable electric hammer overload capacity is poor, all protect through the circuit at present, but use unreliable, still often take place the accident that the control panel burns out. Thirdly, when the piston drives the impact hammer to work, the air is exchanged through a small hole, the air exchange speed is slow, and the impact force of the impact hammer cannot be fully exerted. And fourthly, the motor rotor and stator are fixed by adopting the rib position fixed in the shell, the concentricity of the assembly of the rotor and stator is poor due to the fact that the size processing is not in place, and the motor is easy to wipe a core or is abnormal in work. Aiming at the problems, many manufacturers and acquaintances develop and develop the products, but no ideal products are seen.

The patent application of publication No. CN 211415030U discloses a rechargeable electric hammer, which comprises a head shell, an intermediate cover, a machine shell and a motor, wherein the head shell and the intermediate cover are combined to form a lubricating chamber, an impact rotating mechanism and a power transmission mechanism are arranged in the lubricating chamber, the impact rotating mechanism comprises a hammer rod, a rotating sleeve, a piston, a large gear and a cylinder, the rotating sleeve is arranged on the head shell, a framework oil seal is sleeved on the rotating sleeve, a hammer rod sleeve assembly is arranged in the rotating sleeve, the hammer rod is arranged on the hammer rod sleeve assembly, the cylinder is arranged on the rotating sleeve, the piston is arranged in the cylinder, and the large gear is connected on the rotating sleeve; when the power transmission mechanism drives the large gear to rotate, the drill bit arranged on the drill chuck is driven to rotate through the rotating sleeve, and when the power transmission mechanism drives the cylinder to reciprocate, the piston impacts the drill bit in a reciprocating mode through the hammer rod. After adopting this structure, have simple structure rationally, lubricated effectual, ventilation speed is fast, the impact force is big, overload protection is effectual, advantages such as long service life, but lubricated cavity has head shell and middle lid combination to constitute, and lubricated and leak protection oil effect is unsatisfactory, and lacks overload protection, and the equipment step is also more loaded down with trivial details.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rechargeable electric hammer, simple structure is reasonable, lubricated effectual, the ventilation speed is fast, the impact force is big, overload protection is effectual, long service life, convenient assembling.

The utility model adopts the technical proposal that:

rechargeable electric hammer, including the gear box of reciprocal anchorage, the motor upper bracket, a machine shell, a rotor, the stator, and the switch assembly on the handle, a control panel, the lithium cell package, gear box and motor upper bracket combination constitute lubricated cavity, correspond in the lubricated cavity and install impact slewing mechanism and power transmission mechanism, impact slewing mechanism includes the hammer stem, the rotating sleeve, the impact hammer, the gear wheel, the piston, the rotating sleeve rotationally sets up on the gear box, the front portion of rotating sleeve is equipped with the sealed felt of being connected with gear box sealing connection and is connected with the sliding sleeve, install hammer stem cover assembly through jump ring in the hammer stem cover in the rotating sleeve, power transmission mechanism connects and locates the chassis bottom.

Further, the hammer rod sleeve assembly comprises a hammer rod middle sleeve and a hammer rod rear limiting sleeve which are mutually overlapped, a hammer rod middle sleeve sealing ring is arranged between the hammer rod middle sleeve and the rotating sleeve, a hammer rod rear limiting sleeve sealing ring is arranged between the hammer rod rear limiting sleeve and the hammer rod, and a ventilation ring groove is arranged in the rotating sleeve.

Furthermore, a hammer rod sealing ring is arranged on the hammer rod, the hammer rod is slidably arranged on the hammer rod sleeve assembly, the piston is arranged in the rotating sleeve in a reciprocating motion mode, the impact hammer is slidably arranged in the piston through the impact hammer sealing ring, and the large gear is connected to the rotating sleeve through an overload protection mechanism.

Furthermore, the overload protection mechanism comprises a spring retainer ring, an overload spring and an overload retainer ring, the overload retainer ring is fixedly connected to the rotating sleeve, the large gear is movably sleeved on the rotating sleeve, one side of the large gear is movably matched with the overload retainer ring, and the overload spring is sleeved on the rotating sleeve on the other side of the large gear and tightly presses the large gear.

Furthermore, the power transmission mechanism comprises a gear shaft, a bevel gear, a swing rod bearing and a clutch, wherein the gear shaft is arranged at the lower part in the gear box and the upper bracket of the motor, the bevel gear is fixed on the gear shaft, the swing rod bearing is sleeved on the gear shaft, an output bevel gear shaft of the rotor is meshed with the bevel gear, a swing rod of the swing rod bearing is correspondingly connected to the piston, a gear meshed with the large gear is arranged on the gear shaft, and the swing rod bearing and the gear shaft can be controlled to synchronously rotate or idle relative to the gear shaft through the clutch.

Furthermore, the front part of the machine shell is provided with a front handle capable of adjusting the operation angle.

Further, a motor upper support sealing ring is arranged between the motor upper support and the shell.

Furthermore, the rotor is sleeved with the stator in a matching manner and is positioned at the tail part of the machine shell, and the upper motor support, the rotor, the stator and the lower motor support are connected and fixed into a whole through bolts.

Compared with the prior art, the utility model, following beneficial effect has:

1. in the device, the impact rotating mechanism and the power transmission mechanism are correspondingly arranged in a lubricating cavity formed by combining the gear box and the motor upper bracket, and the hammer rod is provided with the hammer rod sealing ring, so that the lubricating and oil leakage preventing effects are good, the abrasion is small, and the service life is long.

2. The bull gear in this device passes through overload protection mechanism and connects on rotating the cover, and when the load was greater than the frictional resistance between bull gear and the overload retaining ring, the bull gear was automatic skidded relative to the overload retaining ring, can play better overload protection effect to rechargeable electric hammer.

3. The air exchange ring groove is arranged in the rotating sleeve, when the air cylinder drives the piston to work, air exchange is carried out through the air exchange ring groove, air exchange is completed instantly, air exchange speed is high, the piston is not affected by air exchange, and impact force of the piston is fully exerted.

4. The gear box is fixed with the upper motor support, the upper motor support is fixed with the motor and the lower motor support, the whole mechanical transmission mechanism and the motor mechanism form a whole, the concentricity of the motor rotor and the motor stator is guaranteed, meanwhile, the assembly is simpler and more convenient, and the gear box and the motor upper support are directly placed into the shell after being assembled into a whole.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a structural diagram of a lubricating chamber formed by the gearbox and the upper bracket of the motor according to the present invention;

fig. 3 is a structural diagram of the hammer rod sleeve assembly of the present invention.

Wherein: 1. a sliding sleeve; 2. rotating the sleeve; 3. a hammer lever; 4. the middle of the hammer rod is sleeved; 5. a rear limiting sleeve of the hammer rod; 6. a gear case; 7. an overload spring retainer ring; 8. an overload spring; 9. punching a hammer; 10. a bull gear; 11. an overload collar; 12. a piston; 13. a motor upper bracket; 14. a rotor; 15. a stator; 16. a lower motor bracket; 17. a housing; 18. sealing the felt; 19. a hammer stem seal ring; 20. a sealing ring is sleeved in the middle of the hammer rod; 21. a sealing ring of a rear limiting sleeve of the hammer rod; 22. a clamp spring is arranged in the hammer rod sleeve; 23. a stamping hammer sealing ring; 24. a gear shaft; 25. a clutch; 26. a middle swing rod bearing; 27. a front handle; 28. a motor upper bracket sealing ring; 29. a helical gear; 30. a switch assembly; 31. a control panel; 32. a lithium battery pack; 33. a scavenging ring groove; 34. and outputting the helical gear shaft.

Detailed Description

As shown in fig. 1-3, the rechargeable electric hammer comprises a gear box 6, a motor upper bracket 13, a casing 17, a rotor 14, a stator 15, a switch assembly 30 on a handle, a control panel 31 and a lithium battery pack 32, wherein a motor upper bracket sealing ring 28 is arranged between the motor upper bracket 13 and the casing 17, the gear box 6 and the motor upper bracket 13 are combined to form a lubricating cavity, an impact rotating mechanism and a power transmission mechanism are correspondingly arranged in the lubricating cavity, the impact rotating mechanism comprises a hammer rod 3, a rotating sleeve 2, a punching hammer 9, a large gear 10 and a piston 12, the rotating sleeve 2 is rotatably arranged on the gear box 6, a sealing felt 18 hermetically connected with the gear box 6 is arranged at the front part of the rotating sleeve 2 and connected with a sliding sleeve 1, a hammer rod sleeve assembly is arranged in the rotating sleeve 2 through a snap spring 22 in the hammer rod sleeve, and the power transmission mechanism is connected with the bottom of the casing 17. The front part of the housing 17 is provided with a front handle 27 that can adjust the operation angle. In the device, the impact rotating mechanism and the power transmission mechanism are correspondingly arranged in a lubricating cavity formed by combining the gear box and the motor upper bracket, and the hammer rod 3 is provided with the hammer rod sealing ring 19, so that the device has the advantages of good lubricating and oil leakage preventing effects, small abrasion and long service life.

The hammer rod sleeve assembly comprises a hammer rod middle sleeve 4 and a hammer rod rear limiting sleeve 5 which are mutually overlapped, a hammer rod middle sleeve sealing ring 20 is arranged between the hammer rod middle sleeve 4 and the rotating sleeve 2, a hammer rod rear limiting sleeve sealing ring 21 is arranged between the hammer rod rear limiting sleeve 5 and the hammer rod 3, and an air exchange ring groove 33 is formed in the rotating sleeve 2. The air exchange ring groove 33 arranged in the rotating sleeve 2 is used for exchanging air through the air exchange ring groove when the air cylinder drives the piston to work, the air exchange is completed instantly, the air exchange speed is high, the piston is not influenced by the air exchange, and the impact force of the piston is fully exerted.

The hammer rod 3 is provided with a hammer rod sealing ring 19, the hammer rod 3 is slidably arranged on the hammer rod sleeve assembly, the piston 12 is arranged in the rotating sleeve 2 in a reciprocating manner, the impact hammer 9 is slidably arranged in the piston 12 through an impact hammer sealing ring 23, and the large gear 10 is connected to the rotating sleeve 2 through an overload protection mechanism.

The overload protection mechanism comprises a spring retainer ring 7, an overload spring 8 and an overload retainer ring 11, the overload retainer ring 11 is fixedly connected to the rotating sleeve 2, a large gear 10 is movably sleeved on the rotating sleeve 2, one side of the large gear 10 is movably matched with the overload retainer ring 11, and the overload spring 8 is sleeved on the rotating sleeve 2 on the other side of the large gear 10 and tightly presses the large gear 10. When the load is larger than the frictional resistance between the large gear 10 and the overload stop ring 11, the large gear 10 slips relative to the overload stop ring 11. The gearwheel 10 is connected to the rotating sleeve 2 through an overload protection mechanism, and can play a better overload protection role for the rechargeable electric hammer.

The power transmission mechanism comprises a gear shaft 24 arranged at the lower part in the gear box 6 and the motor upper bracket 13, a bevel gear 29 fixed on the gear shaft 24, a swing rod bearing 26 sleeved on the gear shaft 24 and a clutch 25, an output bevel gear shaft 34 of the rotor 14 is meshed with the bevel gear 29, a swing rod of the swing rod bearing 26 is correspondingly connected to the piston 12, a gear meshed with the large gear 10 is arranged on the gear shaft 24, and the swing rod bearing 26 and the gear shaft 24 can be controlled to synchronously rotate or idle relative to the gear shaft 24 through the clutch 25.

The rotor 14 is sleeved with a stator 15 in a matching way and is positioned at the tail part of the machine shell 17, and the upper motor support 13, the rotor 14, the stator 15 and the lower motor support 16 are connected and fixed into a whole through bolts. The gear box 6 is fixed with the upper motor support 13, the upper motor support 13 is fixed with the motor and the lower motor support 16, the whole mechanical transmission mechanism and the motor mechanism form a whole, the concentricity of the motor rotor and the motor stator is ensured, meanwhile, the assembly is simpler and more convenient, and the gear box is directly placed into the shell after being assembled into a whole.

When the device is used, the switch assembly 30 is turned on, when the power transmission mechanism drives the large gear 10 to rotate, the drill bit arranged on the sliding sleeve 1 is driven to rotate through the rotating sleeve 2, when the power transmission mechanism drives the piston 12 to reciprocate, the impact hammer 9 is driven, and the impact hammer 9 impacts the drill bit in a reciprocating manner through the hammer rod 3.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to be included within the scope of the present invention as defined in the appended claims.

Claims

1. Rechargeable electric hammer is including gear box, motor upper bracket, casing, rotor, the stator of reciprocal anchorage to and switch assembly, control panel, lithium cell package on the handle, its characterized in that: the gear box and the upper motor support are combined to form a lubricating cavity, an impact rotating mechanism and a power transmission mechanism are correspondingly installed in the lubricating cavity, the impact rotating mechanism comprises a hammer rod, a rotating sleeve, a punching hammer, a large gear and a piston, the rotating sleeve is rotatably arranged on the gear box, a sealing felt hermetically connected with the gear box is arranged on the front portion of the rotating sleeve and is connected with a sliding sleeve, a hammer rod sleeve assembly is installed in the rotating sleeve through a snap spring in the hammer rod sleeve, and the power transmission mechanism is connected and arranged at the bottom of the machine shell.

2. The charging type electric hammer according to claim 1, wherein: the hammer rod sleeve assembly comprises a hammer rod middle sleeve and a hammer rod rear limiting sleeve which are mutually overlapped, a hammer rod middle sleeve sealing ring is arranged between the hammer rod middle sleeve and the rotating sleeve, a hammer rod rear limiting sleeve sealing ring is arranged between the hammer rod rear limiting sleeve and the hammer rod, and a ventilation ring groove is arranged in the rotating sleeve.

3. The rechargeable electric hammer of claim 1, wherein: the hammer rod is provided with a hammer rod sealing ring, the hammer rod is slidably arranged on the hammer rod sleeve assembly, the piston is arranged in the rotating sleeve in a reciprocating motion mode, the impact hammer is slidably arranged in the piston through the impact hammer sealing ring, and the large gear is connected to the rotating sleeve through the overload protection mechanism.

4. The charging type electric hammer according to claim 3, wherein: the overload protection mechanism comprises a spring retainer ring, an overload spring and an overload retainer ring, the overload retainer ring is fixedly connected to the rotating sleeve, the large gear is movably sleeved on the rotating sleeve, one side of the large gear is movably matched with the overload retainer ring, and the overload spring is sleeved on the rotating sleeve on the other side of the large gear and tightly presses the large gear.

5. The charging type electric hammer according to claim 1, wherein: the power transmission mechanism comprises a gear shaft, a bevel gear, a swing rod bearing and a clutch, wherein the gear shaft is arranged at the lower part of the upper support of the gear box and the motor, the bevel gear is fixed on the gear shaft, the swing rod bearing is sleeved on the gear shaft, an output bevel gear shaft of the rotor is meshed with the bevel gear, a swing rod of the swing rod bearing is correspondingly connected to the piston, a gear meshed with the large gear is arranged on the gear shaft, and the swing rod bearing and the gear shaft can be controlled to synchronously rotate or idle relative to the gear shaft through the clutch.

6. The charging type electric hammer according to claim 1, wherein: the front part of the shell is provided with a front handle capable of adjusting the operation angle.

7. The charging type electric hammer according to claim 1, wherein: and a motor upper support sealing ring is arranged between the motor upper support and the shell.

8. The rechargeable electric hammer of claim 5, wherein: the rotor is sleeved with the stator in a matching mode and located at the tail of the machine shell, and the upper motor support, the rotor, the stator and the lower motor support are connected and fixed into a whole through bolts.