CN211415030U

CN211415030U - Charging type electric hammer

Info

Publication number: CN211415030U
Application number: CN201922309230.7U
Authority: CN
Inventors: 胡丽姬; 吴浩东; 胡新昌
Original assignee: ZHEJIANG BODA INDUSTRIAL CO LTD
Current assignee: ZHEJIANG BODA INDUSTRIAL CO LTD
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-09-04
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses a rechargeable electric hammer, including head shell, middle lid, casing, motor, the head shell constitutes the lubrication cavity with middle lid combination, installs impact slewing mechanism and power transmission mechanism in the lubrication cavity, impact slewing mechanism include hammer stem, rotating sleeve, piston, gear wheel, cylinder, the rotating sleeve sets up on the head shell, the rotating sleeve is equipped with the skeleton oil blanket, installs hammer stem cover assembly in the rotating sleeve, the hammer stem sets up on hammer stem cover assembly, the cylinder sets up in the rotating sleeve, the piston sets up in the cylinder, the gear wheel 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 reasonable, lubricated effectual, ventilation speed is fast, the impact force is big, overload protection is effectual, advantages such as long service life.

Description

Charging type electric hammer

Technical Field

The utility model relates to a rechargeable electric tool technical field, especially a rechargeable electric hammer that lubricated is effectual, the impact force is big.

Background

The charging electric hammer is an electric tool which can drive the drill bit to rotate and hammer the drill bit to and fro 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 drill chuck to rotate through the rotating sleeve, the power transmission mechanism drives the air cylinder to compress air to and fro so that the air pressure in the air cylinder is changed periodically, and the piston drives the hammer rod to impact the drill bit to and fro, and 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. And thirdly, when the cylinder drives the piston to work, the air is exchanged through a small hole, the air exchange speed is slow, and the impact force of the piston cannot be fully exerted. Aiming at the problems, many manufacturers and acquaintances develop and develop the products, but no ideal products are seen.

Disclosure of Invention

In order to overcome the above problems existing in the prior art, the first objective of the present invention is to provide a rechargeable electric hammer with simple and reasonable structure, good lubrication effect, small frictional resistance, fast ventilation speed, large impact force, good overload protection effect and long service life.

The utility model solves the technical problems and adopts the technical proposal that the device comprises a head shell, a middle cover, a shell which are fixed with each other, a motor, a switch assembly, a control panel and a lithium battery pack which are arranged on the shell, wherein the head shell and the middle cover 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, a rotating sleeve, a piston, a big gear and a cylinder, the rotating sleeve is rotatablely arranged on the head shell, the front part of the rotating sleeve is provided with a framework oil seal which is hermetically connected with the head shell and is connected with a drill chuck, a hammer rod sleeve assembly is arranged in the rotating sleeve through a snap spring in the hammer rod sleeve, the hammer rod is provided with two hammer rod sealing rings and can be glidingly arranged on the hammer rod sleeve assembly, the cylinder can be arranged on the rotating sleeve in a reciprocating, the bull gear is connected to the rotating sleeve through an overload protection mechanism; 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 is driven to impact the drill bit in a reciprocating manner through the hammer rod.

The utility model discloses a further scheme, hammer stem cover assembly including the hammer stem of each other intussusception before the stop collar, the cover in the middle of the hammer stem, behind the hammer stem stop collar, be equipped with the cover sealing washer in the middle of the hammer stem between cover in the middle of the hammer stem and the rotation cover, be equipped with behind the hammer stem stop collar sealing washer behind the hammer stem between stop collar and the hammer stem.

In a further aspect of the present invention, the overload protection mechanism includes an overload spring overload retaining ring, the overload retaining 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 retaining 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; when the load is larger than the frictional resistance between the big gear and the overload retainer ring, the big gear slips relative to the overload retainer ring.

In a further aspect of the present invention, the rotating sleeve is provided with a ventilation ring groove.

The utility model discloses a further scheme, power transmission mechanism including rotationally set up the jackshaft between head shell and middle lid, fix bevel gear, the cover on the jackshaft and establish pendulum rod bearing and clutch on the jackshaft, the output skewed tooth axle and the bevel gear meshing of motor, the pendulum rod of pendulum rod bearing corresponds to be connected on the cylinder, be equipped with on the jackshaft with gear wheel meshing's gear shaft, can control pendulum rod bearing and jackshaft synchronous revolution or relative jackshaft idle running through the clutch.

The further proposal of the utility model is that the front part of the head shell is provided with a front handle with adjustable operating angle.

After adopting above-mentioned structure, compare with prior art and have following advantage and effect: firstly, because impact slewing mechanism and power transmission mechanism correspond and install in inclosed lubricated cavity, be equipped with two hammer stem sealing washers on the hammer stem, lubricated and leak protection oil is effectual, and wearing and tearing are little, long service life. Secondly, because the bull gear passes through overload protection mechanism and connects on rotating the cover, when the load is greater than the frictional resistance between bull gear and the overload retaining ring, the bull gear skids relatively the overload retaining ring is automatic, can play better overload protection effect to rechargeable electric hammer. Thirdly, because 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, 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.

Drawings

Fig. 1 is a schematic view of the fitting structure of the present invention.

The drill chuck comprises a drill chuck 1, a hammer rod front limit sleeve 2, a hammer rod 3, a hammer rod middle sleeve 4, a hammer rod rear limit sleeve 5, a rotating sleeve 6, an overload spring 7, a large gear 8, an overload retainer ring 9, a ventilation ring groove 10, a piston 11, a cylinder 12, a head shell 13, a middle cover 14, an output skewed tooth shaft 15, a machine shell 16, a motor 17, a switch assembly 18, a framework oil seal 19, a hammer rod sealing ring 20, a hammer rod middle sleeve sealing ring 21, a hammer rod inner clamp spring 22, a hammer rod rear limit sleeve sealing ring 23, a piston sealing ring 24, a gear shaft 25, a clutch 26, an intermediate shaft 27, a front handle 28, a swing rod bearing 29, a bevel gear 30, a middle cover sealing ring 31, a control panel 32 and a lithium battery pack 33.

Detailed Description

Fig. 1 shows a specific embodiment of the rechargeable electric hammer of the present invention, which includes a head housing 13, an intermediate cover 14, a housing 16, a motor 17, a switch assembly 18, a control panel 32, and a lithium battery pack 33 mounted on the housing 16, wherein the intermediate cover 14 is combined with the head housing 13 through an intermediate cover sealing ring 31 to form a lubrication chamber, an impact rotation mechanism and a power transmission mechanism are correspondingly mounted in the lubrication chamber, the impact rotation mechanism includes a hammer rod 3, a rotation sleeve 6, a piston 11, a bull gear 8, and a cylinder 12, the rotation sleeve 6 is rotatably disposed on the head housing 13, a frame oil seal 19 hermetically connected with the head housing 13 is disposed at the front portion of the rotation sleeve 6 and connected with a drill chuck 1, a hammer rod sleeve assembly is mounted in the rotation sleeve 6 through a hammer rod sleeve inner snap spring 22, a hammer rod 3 is provided with two hammer rod sealing rings 20 and slidably disposed on the hammer rod sleeve assembly, the cylinder 12 is arranged on the rotating sleeve 6 in a reciprocating motion manner, the piston 11 is arranged in the cylinder 12 in a sliding manner through a piston sealing ring 24, and the gearwheel 8 is connected to the rotating sleeve 6 through an overload protection mechanism; when the power transmission mechanism drives the large gear 8 to rotate, the drill bit arranged on the drill chuck 1 is driven to rotate through the rotating sleeve 6, and when the power transmission mechanism drives the cylinder 12 to reciprocate, the piston 11 is driven, and the piston 11 impacts the drill bit in a reciprocating manner through the hammer rod 3.

In order to effectively protect the hammer rod 3 and prevent oil leakage, the hammer rod sleeve assembly comprises a hammer rod front limiting sleeve 2, 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 21 is arranged between the hammer rod middle sleeve 4 and the rotating sleeve 6, and a hammer rod rear limiting sleeve sealing ring 23 is arranged between the hammer rod rear limiting sleeve 5 and the hammer rod 3.

In order to prevent the control panel 32 from being burnt out by overload and locked rotation, the overload protection mechanism comprises an overload spring 7 and an overload check ring 9, the overload check ring 9 is fixedly connected to the rotating sleeve 6, the large gear 8 is movably sleeved on the rotating sleeve 6, one side of the large gear 8 is movably matched with the overload check ring 9, and the overload spring 7 is sleeved on the rotating sleeve 6 on the other side of the large gear 8 and tightly presses the large gear 8; when the load is larger than the friction resistance between the big gear 8 and the overload retainer ring 9, the big gear 8 automatically slips relative to the overload retainer ring 9.

In order to improve the ventilation speed of the cylinder 12 and ensure that the impact force of the piston 11 is fully exerted, the rotating sleeve 6 is internally provided with a ventilation ring groove 10.

In order to ensure stable and reliable transmission, the power transmission mechanism comprises an intermediate shaft 27 which is rotatably arranged between the head shell 13 and the intermediate cover 14, a helical gear 30 fixed on the intermediate shaft 27, a swing rod bearing 29 sleeved on the intermediate shaft 27 and a clutch 26, an output helical gear shaft 15 of the motor 17 is meshed with the helical gear 30, a swing rod of the swing rod bearing 29 is correspondingly connected to the air cylinder 12, the intermediate shaft 27 is provided with a gear shaft 25 meshed with the large gear 8, and the swing rod bearing 29 and the intermediate shaft 27 can be controlled to synchronously rotate or idle relative to the intermediate shaft 27 through the clutch 26.

For convenient operation, the front part of the head shell 13 is provided with a front handle 28 capable of adjusting the operation angle.

The above description is only the specific embodiment of the present invention, and is not intended to limit the present invention in any form, and the present invention does not depart from the technical solution of the present invention, and the made simple modification, equivalent change or modification all fall into the protection scope of the present invention.

Claims

1. The utility model provides a rechargeable electric hammer, includes reciprocal anchorage's head shell (13), middle lid (14), casing (16), motor (17), switch assembly (18), control panel (32), lithium cell package (33) on installation casing (16), characterized by: the head shell (13) and the middle cover (14) 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 (3), a rotating sleeve (6), a piston (11), a large gear (8) and a cylinder (12), the rotating sleeve (6) is rotatably arranged on the head shell (13), a framework oil seal (19) hermetically connected with the head shell (13) is arranged at the front part of the rotating sleeve (6) and connected with a drill chuck (1), a hammer rod sleeve assembly is installed in the rotating sleeve (6) through a hammer rod sleeve inner snap spring (22), two hammer rod sealing rings (20) are arranged on the hammer rod (3) and slidably arranged on the hammer rod sleeve assembly, the cylinder (12) is arranged on the rotating sleeve (6) in a reciprocating manner, the piston (11) is slidably arranged in the cylinder (12) through a piston sealing ring (24), the bull gear (8) is connected to the rotating sleeve (6) through an overload protection mechanism; when the power transmission mechanism drives the large gear (8) to rotate, the drill bit arranged on the drill chuck (1) is driven to rotate through the rotating sleeve (6), when the power transmission mechanism drives the cylinder (12) to reciprocate, the piston (11) is driven, and the piston (11) impacts the drill bit in a reciprocating mode through the hammer rod (3).

2. The charging type electric hammer according to claim 1, wherein: the hammer rod sleeve assembly comprises a hammer rod front limiting sleeve (2), 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 (21) is arranged between the hammer rod middle sleeve (4) and the rotating sleeve (6), and a hammer rod rear limiting sleeve sealing ring (23) is arranged between the hammer rod rear limiting sleeve (5) and the hammer rod (3).

3. The charging type electric hammer according to claim 1 or 2, wherein: the overload protection mechanism comprises an overload spring (7) and an overload check ring (9), the overload check ring (9) is fixedly connected to the rotating sleeve (6), the large gear (8) is movably sleeved on the rotating sleeve (6), one side of the large gear (8) is movably matched with the overload check ring (9), and the overload spring (7) is sleeved on the rotating sleeve (6) on the other side of the large gear (8) and tightly presses the large gear (8); when the load is larger than the frictional resistance between the large gear (8) and the overload retainer ring (9), the large gear (8) slips relative to the overload retainer ring (9).

4. The charging type electric hammer according to claim 3, wherein: the rotating sleeve (6) is internally provided with an air exchange ring groove (10).

5. The charging type electric hammer according to claim 4, wherein: the power transmission mechanism comprises an intermediate shaft (27) which is rotatably arranged between a head shell (13) and an intermediate cover (14), a helical gear (30) fixed on the intermediate shaft (27), a swing rod bearing (29) and a clutch (26) which are sleeved on the intermediate shaft (27), an output helical gear shaft (15) of a motor (17) is meshed with the helical gear (30), a swing rod of the swing rod bearing (29) is correspondingly connected on a cylinder (12), a gear shaft (25) meshed with a large gear (8) is arranged on the intermediate shaft (27), and the swing rod bearing (29) and the intermediate shaft (27) can be controlled to synchronously rotate or idle relative to the intermediate shaft (27) through the clutch (26).

6. The charging type electric hammer according to claim 5, wherein: the front part of the head shell (13) is provided with a front handle (28) capable of adjusting the operation angle.