CN218441750U

CN218441750U - Oil fixing structure of electric tool and angle grinder

Info

Publication number: CN218441750U
Application number: CN202222445032.5U
Authority: CN
Inventors: 高军利
Original assignee: Jiangsu Dartek Technology Co Ltd
Current assignee: Jiangsu Dartek Technology Co Ltd
Priority date: 2022-09-15
Filing date: 2022-09-15
Publication date: 2023-02-03
Anticipated expiration: 2032-09-15

Abstract

The utility model discloses an electric tool's solid oily structure and angle mill, this electric tool's solid oily structure includes casing, gear and sealing washer. The casing has the chamber that holds of storage grease, holds the chamber and is equipped with first ring channel. The gear is located the casing and with hold the coaxial setting of chamber, and the gear has the second ring channel. The casing is located to the sealing washer, and the sealing washer is located first ring channel and at least part is located the second ring channel at least partially, sealing washer and first ring channel and the sealed contact of second ring channel to the messenger holds the chamber and forms and accepts the cavity, thereby the restriction holds the outer hourglass of intracavity grease, and wherein, holds the chamber and is equipped with the bearing, holds the grease of intracavity and lubricates the bearing. Can make the grease save and hold the intracavity, permanent lubricates bearing and pivot, has improved the life of bearing and pivot.

Description

Oil fixing structure of electric tool and angle grinder

Technical Field

The utility model relates to an electric tool field especially relates to an electric tool's solid oily structure and angle mill.

Background

The needle roller bearing of the angle grinder with the traditional structure is not provided with any device for preventing grease from scattering and overflowing, when the angle grinder is used for cutting or grinding, the bearing at the tail end of the rotating shaft and the rotating shaft rub against each other, the inside of the bearing also rubs against each other, and high temperature is generated. The grease can be liquefied at high temperature and can flow away under the action of gravity, and when the angle grinder works, the rotating shaft and the gear rotate at high speed, and the generated centrifugal force can throw the grease which is pre-added in the bearing outwards. Leading to bearing lubrication loss and premature failure and failure of the mating gears of the output shaft and needle bearings due to premature wear.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electric tool's solid oily structure, its bearing life short problem that can effectively alleviate the pivot tail end.

In order to achieve the above object, the present invention provides an oil fixing structure for an electric tool, which comprises a housing, a gear and a sealing ring. The shell is provided with an accommodating cavity, a bearing is arranged in the accommodating cavity, a first annular groove is arranged around the inner wall of the accommodating cavity, and the bearing is axially positioned on the inner side of the first annular groove; one end of the rotating shaft is rotationally fixed on the bearing, and the rotating shaft is provided with a step. The sealing washer is located in the casing, the sealing washer is at least partly located in the first ring channel, the sealing washer with the step sealing contact of first ring channel and pivot, so that the sealing washer with the bearing the first ring channel and the step forms accepts the cavity, and this accepts the interior storage of cavity has the grease.

In one or more embodiments, an upper top surface of the seal ring is axially higher than a lower bottom surface of the bearing.

In one or more embodiments, the first annular groove comprises a first side wall and a first bottom wall, and the sealing ring is in sealing contact with the first side wall and/or the first bottom wall.

In one or more embodiments, the axial section of the first annular groove is an L-shaped structure, the height of the first annular groove is 1-3mm, and the width of the first annular groove is 1-3mm.

In one or more embodiments, a gear is further disposed on the rotating shaft, a second annular groove is disposed on the gear, and the seal ring is at least partially located in the second annular groove.

In one or more embodiments, the second annular groove comprises a second side wall and a second bottom wall, and the sealing ring is in sealing contact with the second side wall and/or the second bottom wall.

In one or more embodiments, the axial section of the second annular groove is an L-shaped structure, the height of the second annular groove is 1-3mm, and the width of the second annular groove is 1-3mm.

In one or more embodiments, the seal ring is made of a deformable material.

In one or more embodiments, the cross section of the sealing ring is circular, rectangular, trapezoidal or triangular, the radial width of the sealing ring is 2-6mm, and the axial width of the sealing ring is 1-5mm.

The utility model also provides an angle mill, including above-mentioned electric tool's solid oily structure.

Compared with the prior art, according to the utility model discloses an electric tool's solid oily structure has following advantage:

a containing cavity is formed by matching the sealing ring with a first annular groove of the containing cavity and a second annular groove of the gear. Lubricating grease which is added to the bearing in advance can be fixed near the bearing of the accommodating chamber, so that the grease cannot be scattered due to the action of centrifugal force, gravity, inertia force, vibration force and the like. Make the solid storage of grease hold the intracavity, permanent lubricates bearing and pivot, has improved the life of bearing and pivot.

Drawings

Fig. 1 is a sectional view of an oil fixation structure of an electric tool according to an embodiment of the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1 of an oil fixation structure of an electric power tool according to an embodiment of the present invention.

Description of the main reference numbers:

1. a housing; 11. an accommodating chamber; 12. a first annular groove; 121. a first side wall; 122. a first bottom wall; 13. a bearing; 14. a rotating shaft; 141. a step; 2. a gear; 21. a second annular groove; 211. a second side wall; 212. a second bottom wall; 3. and (5) sealing rings.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in fig. 1 to 2, an oil fixing structure of an electric tool according to an embodiment of the present invention includes a housing 1, a rotating shaft 14, and a sealing ring 3. The casing 1 has and holds chamber 11, holds and is equipped with bearing 13 in the chamber 11, encircles and holds the chamber 11 inner wall and be equipped with first ring channel 12, and bearing 13 is located first ring channel 12 inboardly in the axial. One end of the rotation shaft 14 is rotatably fixed to the bearing 13, and the rotation shaft 14 has a step 141. And the sealing ring 3 is arranged in the shell 1, at least part of the sealing ring 3 is positioned in the first annular groove 12, and the sealing ring 3 is in sealing contact with the first annular groove 12 and the step 141 of the rotating shaft 14, so that the sealing ring 3, the bearing 13, the first annular groove 12 and the step 141 form a containing cavity in which grease is stored. Wherein the grease in the accommodating cavity 11 can lubricate the bearing 13.

Specifically, as shown in fig. 2, in an embodiment, the first annular groove 12 includes a first side wall 121 and a first bottom wall 122, and the sealing ring 3 is in sealing contact with both the first side wall 121 and the first bottom wall 122 or the sealing ring 3 is in sealing contact with one of the first side wall 121 and the first bottom wall 122, so that the sealing ring 3 is in sealing contact with the first annular groove 12.

In one embodiment, the gear 2 is provided on the rotating shaft 14, and the bearing 13 is provided coaxially with the gear 2. One end of the rotating shaft 14 is in interference fit with the inner ring of the bearing 13, so that the rotating shaft 14 can rotate relative to the bearing 13. Specifically, the gear 2 is provided with a jack, and the jack of the gear 2 is inserted into the rotating shaft 14 and is in interference fit with the rotating shaft 14, so that the gear 2 and the rotating shaft 14 are installed and matched. The gear 2 rotates synchronously with the rotating shaft 14 under the rotation support of the bearing 13.

Specifically, the inner wall of the sealing ring 3 is in interference fit with the peripheral wall of the step 141 to reduce leakage of grease.

In an exemplary embodiment, a second annular groove 21 is further provided along the circumferential direction of the gear 2, the second annular groove 21 includes a second side wall 211 and a second bottom wall 212, and the sealing ring 3 is in sealing contact with both the second side wall 211 and the second bottom wall 212 or the sealing ring 3 is in sealing contact with one of the second side wall 211 and the second bottom wall 212, so that the sealing ring 3 is in sealing contact with the second annular groove 21.

In particular, the sealing ring 3 is made of a deformable material. The section of the sealing ring 3 is circular, rectangular, trapezoidal or triangular, the radial width of the sealing ring 3 is 2-6mm, and the axial width of the sealing ring 3 is 1-5mm. The axial section of the first annular groove 12 is of an L-shaped structure, the height of the first annular groove 12 is 1-3mm, and the width of the first annular groove 12 is 1-3mm. The axial section of the second annular groove 21 is of an L-shaped structure, the height of the second annular groove 21 is 1-3mm, and the width of the second annular groove 21 is 1-3mm. Radial width and axial width of sealing washer 3 are greater than first ring channel 12 height and width and are greater than the height and the width of second ring channel 21, make sealing washer 3 and first ring channel 12 and second ring channel 21 remain interference fit throughout, make sealing washer 3 and first ring channel 12 and second ring channel 21's formation sealing contact, thereby effectively prevent to hold the grease in chamber 11 and expose, can be permanent keep holding the lubrication that holds chamber 11 inner bearing 13, prolong 13 life of bearing.

The utility model also provides an angle grinder, including foretell electric tool's solid oily structure.

The sealing type can be classified into a contact type sealing and a non-contact type sealing according to whether the sealing member is in contact with the component which moves relative to the sealing member. The seals described herein may be contact seals and/or non-contact seals as previously described.

To sum up, the utility model discloses an electric tool's solid oily structure. Through set up sealing washer 3 between the chamber 11 and the gear that hold at casing 1, can effectively restrict and hold the outer hourglass of interior grease of chamber 11 to can play permanent lubricated effect to the bearing 13 that holds in the chamber 11, improve bearing 13's life greatly.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. An oil fixation structure of an electric tool, characterized by comprising:

the bearing device comprises a shell (1) and a bearing, wherein the shell is provided with an accommodating cavity (11), a bearing (13) is arranged in the accommodating cavity (11), a first annular groove (12) is arranged around the inner wall of the accommodating cavity (11), and the bearing (13) is axially positioned on the inner side of the first annular groove (12);

a rotating shaft (14) one end of which is rotationally fixed to the bearing (13), the rotating shaft (14) having a step (141); and

sealing washer (3), locate in casing (1), sealing washer (3) at least part is located in first ring channel (12), sealing washer (3) with step (141) sealing contact of first ring channel (12) and pivot (14), sealing washer (3) with bearing (13) first ring channel (12) and step (141) form accepts the cavity, should accept the intracavity storage and have grease.

2. The oil fixation structure of the electric power tool as set forth in claim 1, wherein an upper top surface of the seal ring (3) is axially higher than a lower bottom surface of the bearing (13).

3. The oil fixation structure of the electric tool as claimed in claim 1, wherein the first annular groove (12) includes a first side wall (121) and a first bottom wall (122), and the seal ring (3) is in sealing contact with the first side wall (121) and/or the first bottom wall (122).

4. The oil fixation structure of the electric tool as claimed in claim 3, wherein the axial section of the first annular groove (12) is an L-shaped structure, the height of the first annular groove (12) is 1-3mm, and the width of the first annular groove (12) is 1-3mm.

5. The oil fixing structure of the electric tool as claimed in claim 1, wherein the rotating shaft (14) is further provided with a gear (2), the gear (2) is provided with a second annular groove (21), and the sealing ring (3) is at least partially positioned in the second annular groove (21).

6. The oil fixation structure of an electric tool according to claim 5, wherein the second annular groove (21) includes a second side wall (211) and a second bottom wall (212), and the seal ring (3) is in sealing contact with the second side wall (211) and/or the second bottom wall (212).

7. The oil fixation structure of the electric tool as claimed in claim 6, wherein the second annular groove (21) has an L-shaped axial cross section, the height of the second annular groove (21) is 1-3mm, and the width of the second annular groove (21) is 1-3mm.

8. Oil fixation structure for electric tools according to claim 1, characterized in that the sealing ring (3) is made of a deformable material.

9. The oil fixation structure of the electric tool as claimed in claim 1, wherein the cross section of the seal ring (3) is circular, rectangular, trapezoidal or triangular, the radial width of the seal ring (3) is 2-6mm, and the axial width of the seal ring (3) is 1-5mm.

10. An angle grinder comprising the oil fixation structure of the electric power tool according to any one of claims 1 to 9.