CN209954614U

CN209954614U - Grease backflow mechanism and electric tool thereof

Info

Publication number: CN209954614U
Application number: CN201920298439.5U
Authority: CN
Inventors: 吕岳; 马国刚
Original assignee: Zhejiang Rui Qi Tools Co Ltd; Ruiqi Holding Co Ltd
Current assignee: Zhejiang Rui Qi Tools Co Ltd; Ruiqi Holding Co Ltd
Priority date: 2019-03-07
Filing date: 2019-03-07
Publication date: 2020-01-17
Anticipated expiration: 2029-03-07

Abstract

The utility model discloses a grease reflux mechanism and an electric tool thereof, which comprises a pressure increasing wheel and a reflux pipe, wherein the pressure increasing wheel is sleeved and fixed on a power shaft, the power shaft is arranged in an inner sleeve of a protective sleeve, and the pressure increasing wheel divides the inner sleeve into two parts; one end of the return pipe is communicated with the inner sleeve at one end of the pressure increasing wheel close to the working head, and the other end of the return pipe is communicated with the output shaft, the eccentric wheel and the primary gear part, so that lubricating grease is guided back to the output shaft, the eccentric wheel and the primary gear part from one end of the pressure increasing wheel close to the working head. The utility model discloses utilize the existing condition only to increase a simple part, make sedimentary lubricating grease can flow to the gear engagement face, life-span such as reinforcing gear, save the lubricating grease quantity. The utility model discloses only increase several simple parts utilizing current condition, just can make the lubricating grease of deposit flow, and to the lubricated key position of needs to increase the vulnerable part of friction (gear etc.) life-span, and then effectively improve the complete machine life-span.

Description

Grease backflow mechanism and electric tool thereof

Technical Field

The utility model relates to an electric tool especially relates to a grease backward flow mechanism and electric tool thereof.

Background

The transmission mechanism of the rotary hammering tool generally consists of two parts of motion devices, wherein firstly, the impact motion device converts the rotation into the reciprocating motion by a gear fixedly connected with an eccentric shaft through the meshing connection transmission with a gear at the output end of a motor, the eccentric shaft is connected with a connecting rod, and the connecting rod is connected with a piston; the piston and the cylinder body are matched to continuously compress air of the cylinder body in the reciprocating motion to cause the large and small hammers in the cylinder body to move so as to impact the working head to do impact motion, and the piston, the connecting rod, the large and small hammers and the working head are formed;

the other rotating device is characterized in that a gear at the output end of the motor is meshed with another gear on the intermediate shaft to drive the intermediate shaft to rotate, and another gear on the intermediate shaft is meshed with a gear in tight fit with the cylinder body to drive the cylinder body to rotate together; in the process, grease for lubrication can be pushed to the end part of the working head due to rotation and reciprocating motion, so that the lubrication of each part needing lubrication is insufficient, and even the temperature is increased to damage the part or spontaneous combustion is caused.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of the prior art, the utility model aims to solve the technical problem that a grease backward flow mechanism and electric tool thereof are provided, it can be with lubricating grease reverse transport to the position that needs the lubrication to guarantee the lubrication of gear.

In order to achieve the purpose, the utility model provides a grease reflux mechanism, which comprises a pressure increasing wheel and a reflux pipe, wherein the pressure increasing wheel is sleeved and fixed on a power shaft, the power shaft is arranged in an inner sleeve of a protective sleeve, and the pressure increasing wheel divides the inner sleeve into two parts;

one end of the return pipe is communicated with the inner sleeve at one end of the pressure increasing wheel close to the working head, and the other end of the return pipe is communicated with the output shaft, the eccentric wheel and the primary gear part, so that lubricating grease is guided back to the output shaft, the eccentric wheel and the primary gear part from one end of the pressure increasing wheel close to the working head, and lubricating oil can also be guided into other parts needing lubrication, such as a large punch hammer, a small punch hammer, an air cylinder and the like.

Preferably, the supercharging wheel is provided with at least two supercharging blades and a supercharging mounting hole, an inclined groove is formed between the two supercharging blades, and an inclination angle beta is formed between the inner side of the inclined groove and the axis of the supercharging wheel.

Preferably, the angle of inclination β is between 10 and 30 °.

The utility model discloses still disclose an electric tool, its application has above-mentioned grease backward flow mechanism.

Preferably, still include sealed self-lubricating mechanism, sealed self-lubricating mechanism includes the oil slinger, and the oil slinger is installed in the sealed hole, and when the oil slinger circumferential direction rotated it formed the negative pressure in sealed hole one side to carry lubricating grease to one-level gear, eccentric gear, throw away through the oil slinger and lubricate on one-level gear, the eccentric gear finally.

Preferably, the oil slinger is provided with at least two blades and mounting through holes, and an oil slinging gap exists between every two blades.

Preferably, the inner wall of the oil slinger gap and the axis of the oil slinger are obliquely arranged on the side wall of the oil slinger at an inclination angle of alpha.

Preferably, α is between 5 and 15 °.

Preferably, the device also comprises a main body, wherein a first clutch tooth, a second clutch tooth, a power shaft, a working head and an eccentric wheel of a motor are arranged on the main body, and the working head and the second clutch tooth are respectively fixed at two ends of the power shaft;

the first clutch teeth are in meshing transmission with the bevel gears, the bevel gears are arranged on the shaft body, the shaft body is also provided with a primary gear, and the shaft body and the main body are rotatably assembled;

the primary gear is in meshing transmission with rotor shaft teeth, the rotor shaft teeth are in meshing transmission with the eccentric gear, the rotor shaft teeth are arranged on an output shaft, and the output shaft is driven by a motor to rotate circumferentially;

the output shaft is assembled and fixed with the inner ring of the deep groove ball bearing, the outer ring of the deep groove ball bearing is assembled with the main body, and an oil slinger is arranged on the part of the output shaft between the rotor shaft teeth and the deep groove ball bearing; the oil slinger and the deep groove ball bearing are both arranged in the sealing hole; an eccentric wheel is eccentrically arranged on the eccentric gear.

Preferably, the electric tool is a percussion drill, the connecting piece is sealed with the inside of the power shaft and can be assembled in an axially sliding manner, and the inside of the power shaft is also sealed with the power piston and can be assembled in an axially sliding manner;

the power piston is attached to one end of the impact rod, the inner sleeve and the inner side of the working head are provided with mounting cylinders, and the mounting cylinders are hollow and are used for being tightly clamped and assembled with the clamping end of the drill bit.

The utility model has the advantages that: the utility model discloses utilize the existing condition only to increase a simple part, make sedimentary lubricating grease can flow to the gear engagement face, life-span such as reinforcing gear, save the lubricating grease quantity.

The utility model discloses only increase several simple parts utilizing current condition, just can make the lubricating grease of deposit flow, and to the lubricated key position of needs to increase the vulnerable part of friction (gear etc.) life-span, and then effectively improve the complete machine life-span.

Drawings

Fig. 1 is a schematic structural diagram of the first embodiment.

Fig. 2 is an enlarged view of fig. 1 at F1.

Fig. 3 is a schematic structural view (plan view) of the oil slinger according to the first embodiment.

Fig. 4 is a sectional view a-a in fig. 3.

Fig. 5 is a sectional view B-B in fig. 3.

Fig. 6 is a schematic structural view (side view, left side view) of the oil slinger of the first embodiment.

Fig. 7 is a schematic structural diagram of the second embodiment.

Fig. 8 is a schematic structural diagram of the second embodiment.

Fig. 9 is a schematic structural view of the second embodiment.

FIG. 10 is a schematic view of a booster wheel according to a second embodiment.

Fig. 11 is a cross-sectional view C-C of fig. 10.

FIG. 12 is a schematic view of a booster wheel according to a second embodiment.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

example one

Referring to fig. 1 to 6, the electric tool of the present embodiment includes a main body 300, the main body 300 is provided with a first clutch tooth 311, a second clutch tooth 312, a power shaft 320, a working head 330, and an eccentric wheel 340, the working head 330 and the second clutch tooth 312 are respectively fixed at two ends of the power shaft 320, and the second clutch tooth 312 and the first clutch tooth 311 can be separated or engaged, so as to cut off or transmit kinetic energy;

the first clutch teeth 311 are in meshing transmission with the bevel gear 250, the bevel gear 250 is mounted on the shaft body 350, the shaft body 350 is further provided with the primary gear 231, and the shaft body 350 is rotatably assembled with the main body 300;

the primary gear 231 is in meshing transmission with rotor shaft teeth 240, the rotor shaft teeth 240 are in meshing transmission with the eccentric gear 232, the rotor shaft teeth 240 are arranged on the output shaft 111, and the output shaft 111 is driven by the motor 110 to rotate circumferentially;

the output shaft 111 is fixedly assembled with the inner ring of the deep groove ball bearing 210, the outer ring of the deep groove ball bearing 210 is assembled with the main body 300, and the oil slinger 220 is installed on the part of the output shaft 111 between the rotor shaft teeth 240 and the deep groove ball bearing 210;

the oil slinger 220 is provided with at least two blades 221 and mounting through holes 223, an oil slinging gap 222 is formed between every two blades 221, the eccentric gear 232 is eccentrically provided with an eccentric wheel 340, and the eccentric wheel 340 is used for continuously pushing the first centrifugal teeth 311 to move to and fro linearly towards the second centrifugal teeth 312 during rotation, so that the power shaft is driven to rotate circumferentially.

The eccentric gear 232 and the eccentric wheel 340 are both fitted on the eccentric shaft 360, the eccentric wheel 340 is fitted with a connecting member 420 through a driving rod 410, and the connecting member 420 is fixed to the first clutch gear 311 so that the first clutch gear 31 is driven to reciprocate when the eccentric wheel 340 rotates circumferentially.

The oil slinger 220 and the deep groove ball bearing 210 are both arranged in the sealing hole 301, when the oil slinger is used, an output shaft drives the oil slinger 220 to rotate in the circumferential direction, lubricating grease flows centripetally in the oil slinger gap 222 and upwards in the axial direction of the oil slinger, so that the lubricating grease thrown into the sealing hole 301 and flowing downwards is lifted upwards (reversely), and then thrown to the meshing positions of the rotor shaft teeth 240 and the first-stage gear 231 and the eccentric gear 232 through the top of the oil slinger 220, so that the lubricating grease is thrown to the meshing positions of the rotor shaft teeth 240 and the first-stage gear 231 and the eccentric gear 232 respectively, and the first-stage gear 231 and the eccentric gear 232 are lubricated.

Preferably, the inner wall of the oil slinger clearance 222 and the axis of the oil slinger 220 form an inclined angle of alpha, and the inclined angle is obliquely arranged on the side wall of the oil slinger 220, and the value of alpha is between 5 and 15 degrees.

The oil slinger 220 is overlapped with the rotor shaft teeth 240 engaged with the primary gear 231 and the eccentric gear 232, respectively, in the top view direction of fig. 1, and a fan-like is formed between the oil slinger 220 and the seal hole 301, thereby forming an upward lifting force for the lubricating grease.

Example two

Referring to fig. 7-12, in actual use, the working head 330 may be inclined downward or used with resin, which may cause grease used for lubricating the output shaft 111, the eccentric wheel 340, the primary gear 231, and the eccentric gear 232 to flow toward the working head under the action of gravity, thereby causing insufficient lubrication of parts of the working head, and also causing abnormal wear of the parts and spontaneous combustion of the parts. To this end, the applicant adds a grease reflux mechanism, which includes a pressure increasing wheel 510 and a reflux pipe 520, wherein the pressure increasing wheel 510 is sleeved and fixed on the power shaft 320, the power shaft 320 is installed in the inner sleeve 371 of the protective sleeve 370, and the pressure increasing wheel 510 divides the inner sleeve 371 into two parts;

one end of the return pipe 520 is communicated with the inner sleeve 371 at one end of the pressure increasing wheel 510 close to the working head 330, and the other end is communicated with the output shaft 111, the eccentric wheel 340 and the primary gear 231, so that lubricating grease is guided back to the output shaft 111, the eccentric wheel 340 and the primary gear 231 from one end of the pressure increasing wheel 510 close to the working head 330, and sufficient lubrication can be ensured at any time.

When the power shaft 320 rotates, a pressure difference (similar to a vane pump or a fan) is formed on two sides of the inner sleeve 371, and a high pressure is formed on one side close to the working head, so that lubricating grease is pressed into the return pipe 520, and then the lubricating grease is guided back to the output shaft 111, the eccentric wheel 340, the primary gear 231 and the eccentric gear 232 through the return pipe 520 to be lubricated.

The pressurizing wheel 510 is provided with at least two pressurizing blades 511 and pressurizing mounting holes 512, a chute 513 is formed between the two pressurizing blades 511, an inclined angle beta is formed between the inner side of the chute 513 and the axis of the pressurizing wheel 510, and the inclined angle beta is 10-30 degrees in the embodiment.

The electric tool of the embodiment is a percussion drill, and when the electric tool is actually used, the connecting piece 420 is sealed and axially and slidably assembled with the inside of the power shaft 320, and the inside of the power shaft 320 is also sealed and axially and slidably assembled with the power piston 430;

the power piston 430 is engaged with one end of the striking rod 130, so as to transmit an axial impact force to the striking rod 130 and then to the drill bit, thereby forming an axial reciprocating impact force. The inner sleeve 371 and the inner side of the working head 330 are provided with the mounting cylinder 120, and the mounting cylinder 120 is hollow and used for being tightly clamped and assembled with the clamping end of the drill bit.

In use, the eccentric rotates and the drive connection member 420 reciprocates within the inner sleeve 371 to thereby generate an impact force on the power piston 430 to drive the first clutch gear to reciprocate to drive the power shaft to rotate circumferentially.

The details of the present invention are well known to those skilled in the art.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A grease backflow mechanism is characterized in that: the device comprises a pressure increasing wheel and a return pipe, wherein the pressure increasing wheel is sleeved and fixed on a power shaft, the power shaft is arranged in an inner sleeve of a protective sleeve, and the pressure increasing wheel divides the inner sleeve into two parts;

one end of the return pipe is communicated with the inner sleeve at one end of the booster wheel close to the working head, and the other end of the return pipe is communicated with the output shaft, the eccentric wheel and the primary gear.

2. The grease return mechanism of claim 1, wherein: the supercharging wheel is provided with at least two supercharging blades and supercharging mounting holes, an inclined groove is formed between the two supercharging blades, and an inclination angle beta is formed between the inner side of the inclined groove and the axis of the supercharging wheel.

3. The grease return mechanism of claim 2, wherein: the inclination angle beta is between 10 and 30 degrees.

4. An electric tool, characterized in that: use of a grease return mechanism according to any of claims 1-3.

5. The power tool of claim 4, wherein: the lubricating oil device is characterized by further comprising a sealed self-lubricating mechanism, wherein the sealed self-lubricating mechanism comprises an oil slinger, the oil slinger is installed in a sealing hole, and negative pressure is formed on one side of the sealing hole when the oil slinger rotates in the circumferential direction, so that lubricating grease is conveyed to the first-level gear and the eccentric gear, and finally the lubricating grease is thrown to the first-level gear and the eccentric gear through the oil slinger for lubrication.

6. The power tool of claim 5, wherein: the oil slinger is provided with at least two blades and mounting through holes, and an oil slinging gap exists between every two blades.

7. The power tool of claim 6, wherein: the inner wall of the oil slinging gap and the axis of the oil slinging ring form an inclined angle with an angle alpha, and the inclined angle is obliquely arranged on the side wall of the oil slinging ring.

8. The power tool of claim 7, wherein: the value of alpha is between 5 and 15 degrees.

9. The power tool of claim 4, wherein: the device comprises a main body, a motor, a first clutch gear, a second clutch gear, a power shaft, a working head and an eccentric wheel, wherein the main body is provided with the motor, and the working head and the second clutch gear are respectively fixed at two ends of the power shaft;

10. The power tool of claim 9, wherein: the electric tool is a percussion drill, the connecting piece is sealed with the inside of the power shaft and can be assembled in an axially sliding manner, and the inside of the power shaft is also sealed with the power piston and can be assembled in an axially sliding manner;