CN218440570U

CN218440570U - Gear box structure and angle grinder

Info

Publication number: CN218440570U
Application number: CN202222324088.5U
Authority: CN
Inventors: 高军利
Original assignee: Jiangsu Dartek Technology Co Ltd
Current assignee: Jiangsu Dartek Technology Co Ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2023-02-03
Anticipated expiration: 2032-09-01

Abstract

The utility model discloses a gear box structure and angle mill, wherein the gear box structure includes box, sealing washer and master gear. The box body is provided with a containing cavity, and an annular groove is arranged around the wall of the containing cavity. The sealing ring is arranged in the annular groove. The main gear is arranged in the accommodating cavity. Wherein the accommodating cavity is partitioned into a second cavity and a first cavity for storing grease, the seal ring is in sealing contact with the annular groove and the main gear, and the seal ring limits the grease from flowing from the first cavity to the second cavity, wherein a tooth part of the main gear is located in the first cavity. Thereby keeping the first chamber filled with grease to lubricate the operation of the main gear. Meanwhile, the flow of grease into the second cavity is reduced, so that the influence of the grease on other parts in the second cavity is relieved.

Description

Gear box structure and angle grinder

Technical Field

The utility model relates to an angle mill field especially relates to a gear box structure and angle mill.

Background

All angle mills of circulation on the market at present, the grease in its gear box is mainly lubricated the gear, and the grease gets rid of to the gear box inner wall under the effect of centrifugal force when the gear is high-speed rotatory, is gapped between box inner wall and master gear, and the grease can leak to the second bearing of bearing frame from the clearance on, and the back has been prolonged for a long time, and the grease is leaked, thereby the gear has just lost the lubrication and has become invalid very fast. Grease is accumulated between the back of the main gear and the second bearing of the bearing seat, pressure rises after the inside of the gear box is heated, and the grease extrudes the original grease in the second bearing of the bearing seat, so that the service life of the bearing seat is shortened.

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 constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gear box structure, it can effectively alleviate the lubricated short problem of life of gear box.

In order to achieve the above object, the present invention provides a gear box structure, which comprises a box body, a sealing ring and a main gear. The box body is provided with a containing cavity, and an annular groove is arranged around the wall of the containing cavity. The sealing ring is arranged in the annular groove. The main gear is arranged in the accommodating cavity. The containing cavity is divided into a second cavity and a first cavity for storing grease, the sealing ring is in sealing contact with the annular groove and the main gear, the sealing ring limits the grease to flow into the second cavity from the first cavity, and the tooth part of the main gear is located in the first cavity.

In one or more embodiments, the sealing ring is disposed in abutment with a bottom wall of the annular groove, the sealing ring being disposed in abutment with an outer wall of the main gear to form a sealing contact.

In one or more embodiments, the annular groove includes a first sidewall and a second sidewall, the main gear is provided with a chainring bottom surface and a tooth root bottom plane, the first sidewall and the second sidewall are disposed within an axial extent of the chainring bottom surface and the tooth root bottom plane.

In one or more embodiments, the cross-section of the sealing ring is circular, rectangular, trapezoidal, or triangular.

In one or more embodiments, the gap between the outer wall of the main gear and the cavity wall of the accommodating cavity is between 0.5mm and 2 mm.

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

In one or more embodiments, the cross-section of the annular groove is circular, rectangular or triangular.

In one or more embodiments, the depth of the annular groove is 1-3mm and the width of the annular groove is 1-3mm.

In one or more embodiments, the radial width of the seal ring is 2-6mm and the axial width of the seal ring is 1-3mm.

The utility model also provides an angle mill, include the gear box structure.

Compared with the prior art, according to the utility model discloses a gear box structure has following advantage:

an annular groove is formed in the periphery of the inner wall of the gear box, and the annular groove is located in the area between the inner wall of the gear box and the outer wall of the main gear. The sealing ring is filled between the inner wall of the gear box and the outer wall of the main gear, and an interference fit relation is formed between the inner wall of the gear box and the outer wall of the main gear, so that the accommodating cavity of the gear box is divided into two parts (a first cavity and a second cavity) by the sealing ring. The tooth part of the main gear is positioned in the first cavity and the first cavity is provided with grease, so that the tooth part of the main gear can be sufficiently lubricated, and the grease is kept in the first cavity.

In addition, set up the second bearing in the second cavity for because the restriction of sealing washer, make in the grease can not flow into or hardly flow into the second cavity, thereby can not or hardly extrude coming to original grease in the second bearing of bearing frame, thereby prolonged the life-span of gear greatly.

Drawings

Fig. 1 is a schematic structural view of a case, a seal ring and a main gear of a gear case structure according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional structural view of a gearbox configuration according to an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2 of a gearbox configuration according to an embodiment of the present invention;

fig. 4 is an enlarged view of a portion B of fig. 2 of a gear box structure according to an embodiment of the present invention.

Description of the main reference numerals:

1. a box body; 11. an accommodating chamber; 111. a first chamber; 112. a second chamber; 12. an annular groove; 121. a first side wall; 122. a second side wall; 123. a bottom wall; 13. a first bearing; 14. an output shaft; 15. a bearing seat; 16. a second bearing; 2. a seal ring; 3. a main gear; 31. a bottom surface of the fluted disc; 32. a root base plane; 33. an outer wall.

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 4, a gear box structure according to an embodiment of the present invention includes a box body 1, a packing 2, and a main gear 3. The cylindrical chamber 11 that holds has in the box 1, has seted up annular groove 12 to box 1 inner wall along holding chamber 11. The main gear 3 is arranged in the accommodating cavity 11, the accommodating cavity 11 is divided into a second cavity 112 and a first cavity 111 for storing grease by taking the sealing ring 2 as a separation line, the sealing ring 2 is in sealing contact with the annular groove 12 and the main gear 3 so as to limit the grease from flowing into the second cavity 112 from the first cavity 111, wherein the first teeth of the main gear 3 are positioned in the first cavity 111.

Specifically, as shown in fig. 3 and 4, in one embodiment, the seal ring 2 is disposed in contact with the bottom wall 123 of the annular recess 12, and the seal ring 2 is disposed in contact with the outer wall 33 of the main gear 3. The annular groove 12 comprises a first side wall 121 and a second side wall 122, the main gear 3 being provided with a chainring bottom surface 31 and a tooth root bottom plane 32, the first side wall 121 and the second side wall 122 being provided within the axial extent of the chainring bottom surface 31 and the tooth root bottom plane 32. So that the sealing ring 2 always seals and separates the receiving space 11.

The sealing ring 2 is made of a deformable material. The section of the sealing ring 2 is circular, rectangular, trapezoidal or triangular, and the section of the annular groove 12 is circular, rectangular or triangular. The depth of the annular groove 12 is 1-3mm, and the width of the annular groove 12 is 1-3mm. The radial width of the sealing ring 2 is 2-6mm, and the axial width of the sealing ring 2 is 1-3mm. The clearance between the outer wall of the main gear 3 and the cavity wall of the accommodating cavity 11 is between 0.5mm and 2 mm. The radial width and the axial width of the sealing ring 2 are larger than the depth and the width of the annular groove 12, so that the sealing ring 2 and the annular groove 12 are always in interference fit, and meanwhile, the sealing ring 2 can be in sealing contact with the outer wall of the main gear 3. Thereby facilitating maintaining a sealed separation of the first chamber 111 and the second chamber 112.

As shown in fig. 2 and 3, the accommodating chamber 11 has an open end. The first chamber 111 that holds the chamber 11 is provided with a bearing groove that communicates with the chamber 11, and a first bearing 13 is provided corresponding to the bearing groove. An output shaft 14 is rotatably arranged on the first bearing 13, and the main gear 3 is sleeved on the output shaft 14. So that the main gear 3 rotates with the output shaft 14 while being in sliding contact with the seal ring 2.

The part of the main gear 3 with the first teeth is located in the first cavity 111, the box body 1 is further internally provided with a pinion, the pinion is provided with second teeth, the main gear 3 and the pinion are in meshing transmission through the first teeth and the second teeth, and the meshing position of the first teeth and the second teeth is located in the first cavity 111, so that the grease can lubricate the meshing transmission of the first teeth and the second teeth.

A bearing seat 15 is arranged at one open end of the accommodating cavity 11, and a second bearing 16 is arranged on the bearing seat 15. The first bearing 13 is arranged coaxially with the second bearing 16 such that one end of the output shaft 14 is rotatably mounted on the first bearing 13 and the other end of the output shaft 14 is rotatably mounted on the second bearing 16. With the second bearing 16 located within the second chamber 112. Since the grease is confined in the first chamber 111 and does not flow into the second chamber 112, the grease in the second bearing 16 is not squeezed, thereby prolonging the service life of the second bearing 16.

The utility model also provides an angle grinder, including the gear box structure.

To sum up, the utility model discloses a gear box structure. By providing the seal ring 2 between the casing 1 and the main gear 3, dividing the casing 1 into the first chamber 111 and the second chamber 112 containing grease by the seal ring 2, and restricting the flow of grease from the first chamber 111 to the second chamber 112, sufficient grease is always maintained in the first chamber 111 to maintain the lubricating effect of the remaining components in the first chamber 111. In addition, the problem of short service life of the second bearing 16 due to the displacement of the original grease in the second bearing 16 caused by the excess grease stored in the second chamber 112 is also alleviated.

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 thereby enable others skilled in the art to make and utilize various exemplary embodiments of the invention and various alternatives and modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A gearbox arrangement, comprising:

the box body (1) is provided with an accommodating cavity (11), and an annular groove (12) is arranged around the wall of the accommodating cavity (11);

the sealing ring (2) is arranged in the annular groove (12); and

the main gear (3) is arranged in the accommodating cavity (11);

wherein the containing cavity (11) is divided into a second cavity (112) and a first cavity (111) for storing grease, the sealing ring (2) is in sealing contact with the annular groove (12) and the main gear (3), and the tooth part of the main gear (3) is positioned in the first cavity (111).

2. Gearbox construction according to claim 1, characterised in that the sealing ring (2) is arranged in abutment with the bottom wall (123) of the annular groove (12), and that the sealing ring (2) is arranged in abutment with the outer wall (33) of the main gear (3).

3. Gearbox arrangement according to claim 1, characterised in that the annular groove (12) comprises a first side wall (121) and a second side wall (122), the main gear (3) being provided with a toothed disc bottom surface (31) and a tooth root bottom plane (32), the first side wall (121) and the second side wall (122) being provided within the axial extent of the toothed disc bottom surface (31) and the tooth root bottom plane (32).

4. Gearbox construction in accordance with claim 1, characterised in that the cross-section of the sealing ring (2) is circular, rectangular, trapezoidal or triangular.

5. Gearbox arrangement according to claim 1, characterised in that the outer wall of the main gear (3) is spaced between 0.5mm and 2mm from the wall of the accommodating chamber (11).

6. Gearbox construction in accordance with claim 1, characterised in that the sealing ring (2) is made of a deformable material.

7. Gearbox construction in accordance with claim 1, characterised in that the cross-section of the annular groove (12) is circular, rectangular or triangular.

8. Gearbox construction in accordance with claim 1, characterised in that the depth of the annular groove (12) is 1-3mm and the width of the annular groove (12) is 1-3mm.

9. Gearbox construction in accordance with claim 1, characterised in that the radial width of the sealing ring (2) is 2-6mm and the axial width of the sealing ring (2) is 1-3mm.

10. An angle grinder, characterized by comprising a gearbox arrangement according to any one of claims 1-9.