CN216923189U

CN216923189U - Gearbox output semi-axis oil blanket protection architecture

Info

Publication number: CN216923189U
Application number: CN202220557537.8U
Authority: CN
Inventors: 吕建超
Original assignee: Hamilton Tianjin Machinery Co ltd
Current assignee: Hamilton Tianjin Machinery Co ltd
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-07-08
Anticipated expiration: 2032-03-15

Abstract

The utility model relates to the technical field of gearbox oil seals, in particular to a gearbox output half shaft oil seal protection structure which comprises a rubber seal, a metal framework embedded in the rubber seal and a spring sleeved with the rubber seal, wherein the rubber seal comprises an inner diameter surface, an outer diameter surface positioned on the outer side of the inner diameter surface and a bottom end surface connecting the inner diameter surface and the outer diameter surface which are integrally formed, a sealing lip and a dust lip are fixedly arranged on the inner wall of the inner diameter surface, a spring groove which is arranged opposite to the sealing lip and used for accommodating the spring is formed in the outer wall of the inner diameter surface, two lip flaps are fixedly arranged on the dust lip far away from the inner diameter surface, a first annular recess is enclosed between the two lip flaps, and a second annular recess is formed in the end surface of the lip flap far away from the inner diameter surface. According to the utility model, the annular recess is formed on the dustproof lip, so that lubricating grease can seep out between the output half shaft of the gearbox and the dustproof lip to form an oil film which lasts for a long time, and the dustproof lip is prevented from being overheated and worn.

Description

Gearbox output semi-axis oil blanket protection architecture

Technical Field

The utility model relates to the technical field of gearbox oil seals, in particular to a gearbox output half shaft oil seal protection structure.

Background

The half shaft is a shaft for transmitting torque between a speed reducer of the gearbox and a driving wheel, and the inner end and the outer end of the half shaft are respectively provided with a universal joint which is respectively connected with a gear of the speed reducer and an inner ring of a hub bearing through a spline on the universal joint. The solid shaft between the output end of the differential and the wheel is the half shaft.

The oil seal protection is a sealing element for static sealing and dynamic sealing, and plays a role in isolating parts needing lubrication in a transmission part from a force-applying part so as not to allow lubricating oil to leak.

Utility model with publication number CN204004425U discloses a gearbox output shaft oil blanket, and it includes the rubber skeleton that metal framework and outside cover were established, and rubber skeleton's bottom is provided with sealed main lip, sealed pair lip. The utility model discloses a lip of well sealed pair lip is the arc structure, and sealed effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a transmission output half shaft oil seal protection structure to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a gearbox output semi-axis oil blanket protection architecture, includes rubber seal, imbeds the metal framework in the rubber seal to and the spring that cup joints mutually with rubber seal, rubber seal is by the inside diameter face, is located the outside diameter face in the inside diameter face outside to and connect the bottom face integrated into one piece of inside diameter face and outside diameter face, the inner wall of inside diameter face is fixed and is equipped with seal lip and dust lip, the outer wall of inside diameter face seted up with seal lip back to back is to arranging and is held the spring groove of spring, keep away from on the dust lip the end fixing of inside diameter face is equipped with two lip lamellas, two enclose between the lip lamella and closed first annular is sunken, keep away from on the lip lamella the second annular is sunken has been seted up to the terminal surface of inside diameter face.

Optionally, the forward longitudinal section of the first annular recess is rectangular, and the depth of the first annular recess is 0.05-0.10 mm.

Optionally, the forward longitudinal section of the second annular recess is in a dovetail groove shape, and the depth of the second annular recess is 0.35-0.50 mm.

Optionally, a metal wire is arranged in the spring groove, the metal wire penetrates through the inner ring of the spring, and two ends of the metal wire are bound together after respectively winding the spring groove for half a circle.

Optionally, a wave-shaped surface is fixedly arranged on the outer wall of the outer diameter surface, and an axis of the wave-shaped surface and an axis of the outer diameter surface are on the same vertical line.

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

1. according to the utility model, the annular recess is formed on the dustproof lip, so that lubricating grease can seep out between the output half shaft of the gearbox and the dustproof lip to form an oil film which lasts for a long time, the dustproof lip is prevented from being overheated and worn, the structure is novel, and the structure is compact;

2. according to the utility model, the spring can be restrained in the spring groove through the annular structure bound by the metal wires, so that the spring is prevented from falling off due to the deformation of the oil seal during transportation and use of the oil seal protection;

3. the utility model increases the adhesive force with the gearbox bearing seat when the outer diameter surface is installed through the wavy surface, avoids the danger of retreating and skewing of the oil seal protection, and also increases the press fit tolerance of the oil seal protection and the gearbox output shaft, thereby improving the reliability of static sealing of the oil seal protection.

Drawings

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

fig. 2 is an enlarged schematic view of a portion a in fig. 1.

In the figure: 1. sealing with rubber; 2. an inner diameter surface; 3. an outer diameter surface; 4. a bottom end face; 5. a sealing lip; 6. a spring slot; 7. a dust lip; 8. a lip; 9. a first annular recess; 10. a second annular recess; 11. a metal wire; 12. a metal skeleton; 13. a spring; 14. a wavy surface.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment is as follows: referring to fig. 1 and 2, the present invention provides a protection structure for an output half shaft oil seal of a transmission, which includes a rubber seal 1, a metal framework 12 embedded in the rubber seal 1, and a spring 13 sleeved with the rubber seal 1. The rubber seal 1 is integrally formed by an inner diameter surface 2, an outer diameter surface 3 located outside the inner diameter surface 2, and a bottom end surface 4 connecting the inner diameter surface 2 and the outer diameter surface 3. The inner wall of inner diameter face 2 is fixed and is equipped with seal lip 5 and dust lip 7, and the outer wall of inner diameter face 2 is seted up and is just held spring 13's spring groove 6 with seal lip 5 back to back, keeps away from the fixed two lip lamellas 8 that are equipped with of terminal surface of inner diameter face 2 on the dust lip 7. A first annular recess 9 is enclosed between the two lip flaps 8, the longitudinal section of the forward direction of the first annular recess 9 is rectangular, and the depth of the first annular recess 9 is 0.05-0.10 mm. The end face, far away from the inner diameter face 2, of the lip 8 is provided with a second annular recess 10, the forward longitudinal section of the second annular recess 10 is in a dovetail groove shape, and the depth of the second annular recess 10 is 0.35-0.50 mm.

This embodiment is through seting up first annular sunken 9 for dust lip 7 is divided into two, thereby has two lip 8, increases dust lip 7's dustproof reliability, and through seting up second annular sunken 10 on lip 8, makes lip 8 have many lips seal structure, further increases dust lip 7's dustproof reliability. After keeping away from the coating lubricating grease of the terminal surface of inside diameter face 2 on dust lip 7, partial lubricating grease can flow to first annular sunken 9 and second annular sunken 10 in, has improved the content of lubricating grease on dust lip 7, and after dust lip 7 was installed on gearbox output semi-cycle, lubricating grease can ooze, is favorable to forming the oil film between gearbox output semi-axis and dust lip 7, and the oil film lasts for a long time, avoids dust lip 7 overheated, wearing and tearing.

On the basis of the above embodiments, in the present embodiment, the metal wire 11 is disposed in the spring slot 6, the metal wire 11 is inserted into the inner ring of the spring 13, and two ends of the metal wire 11 are respectively bound together after half of the circumference of the spring slot 6. Through the annular structure that wire 11 ligature becomes, can retrain spring 13 in spring groove 6, avoid when transportation and use oil blanket protection, lead to spring 13 to drop because of the oil blanket protection warp.

On the basis of the above embodiments, in this embodiment, the outer wall of the outer diameter surface 3 is fixedly provided with a wavy surface 14, and the axis of the wavy surface 14 and the axis of the outer diameter surface 3 are on the same vertical line. The wavy surface 14 can increase the adhesive force between the outer diameter surface 3 and a gearbox bearing seat during installation, avoid the danger of retreating and skewing of oil seal protection, and increase the press fit tolerance between the oil seal protection and a gearbox output shaft, thereby improving the reliability of static sealing of the oil seal protection.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a gearbox output semi-axis oil blanket protection architecture which characterized in that: comprises a rubber seal (1), a metal framework (12) embedded in the rubber seal (1), and a spring (13) sleeved with the rubber seal (1), wherein the rubber seal (1) consists of an inner diameter surface (2) and an outer diameter surface (3) positioned at the outer side of the inner diameter surface (2), and a bottom end face (4) connecting the inner diameter face (2) and the outer diameter face (3) are integrally formed, the inner wall of the inner diameter surface (2) is fixedly provided with a sealing lip (5) and a dust lip (7), the outer wall of the inner diameter surface (2) is provided with a spring groove (6) which is arranged back to back with the sealing lip (5) and accommodates the spring (13), two lip flaps (8) are fixedly arranged on the end surface of the dust lip (7) far away from the inner diameter surface (2), a first annular recess (9) is enclosed between the two lip flaps (8), and a second annular recess (10) is formed in the end face, far away from the inner diameter face (2), of the lip (8).

2. The gearbox output half shaft oil seal protection structure as claimed in claim 1, characterized in that: the forward longitudinal section of the first annular recess (9) is rectangular, and the depth of the first annular recess (9) is 0.05-0.10 mm.

3. The gearbox output half shaft oil seal protection structure as claimed in claim 1, characterized in that: the positive longitudinal section of the second annular recess (10) is in a dovetail groove shape, and the depth of the second annular recess (10) is 0.35-0.50 mm.

4. The protection structure for the oil seal of the output half shaft of the gearbox as claimed in claim 1, characterized in that: the spring is characterized in that a metal wire (11) is arranged in the spring groove (6), the metal wire (11) penetrates through the inner ring of the spring (13), and two ends of the metal wire (11) are bound together after being wound around the spring groove (6) for half a circle respectively.

5. The gearbox output half shaft oil seal protection structure as claimed in claim 1, characterized in that: the outer wall of the outer diameter surface (3) is fixedly provided with a wave-shaped surface (14), and the axis of the wave-shaped surface (14) and the axis of the outer diameter surface (3) are positioned on the same vertical line.