CN110939494A

CN110939494A - Camshaft support

Info

Publication number: CN110939494A
Application number: CN201911292062.3A
Authority: CN
Inventors: 余雷
Original assignee: Sixian Golden Anhui Pump Industry Co Ltd
Current assignee: Sixian Golden Anhui Pump Industry Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-03-31

Abstract

The invention discloses a camshaft support, which comprises a grease nipple and a support shell, wherein a mounting hole which is through from front to back is formed in the support shell, a radial spherical plain bearing matched with the mounting hole is arranged in the mounting hole, a first oil seal is arranged in the mounting hole at the front end of the radial spherical plain bearing, and a second oil seal is arranged in the mounting hole at the rear end of the radial spherical plain bearing. The invention has reasonable structural design, and has various performances of large loading capacity, impact resistance, corrosion resistance, wear resistance, self-aligning, good lubrication and the like; the use effect is ensured by dustproof sealing, and the service life is prolonged; the axial movement of the radial spherical plain bearing is avoided, and the stability is improved; the size of the device is consistent with the external size of the original device, and the interchangeability is good.

Description

Camshaft support

Technical Field

The invention relates to the technical field of accessories, in particular to a camshaft support.

Background

The camshaft support is one of key components of a braking system and is a core part for ensuring whether the camshaft can ensure efficient brake force transmission and flexible return during braking. A conventional camshaft support consists of a simple support housing, a bimetallic bushing and a grease fitting (see fig. 1 and 2). Dust or muddy water is easy to enter between the existing bimetallic lining and the camshaft, so that the conditions of large rotating friction force, inflexible return, easy abrasion, easy corrosion and the like of the camshaft during braking are caused; meanwhile, due to the structural limitation of the bimetal bush, the whole load bearing capacity and impact resistance of the bimetal bush are weaker, and the bimetal bush does not have self-aligning capacity. And thus improvements thereof are needed.

Disclosure of Invention

The technical problem of the invention is as follows: due to the structural limitation of the bimetal bush, the whole load bearing capacity and impact resistance of the bimetal bush are weak, and the bimetal bush does not have self-aligning capacity.

In order to solve the technical problems, the invention provides the following technical scheme,

the utility model provides a camshaft support, includes grease nipple and support shell, the mounting hole that link up around being provided with in the support shell, be provided with the radial spherical plain bearing who matches with it in the mounting hole, be provided with first oil blanket in the mounting hole of radial spherical plain bearing front end, be provided with the second oil blanket in the mounting hole of radial spherical plain bearing rear end.

Preferably, the mounting hole comprises first installation cavity, second installation cavity, third installation cavity and the fourth installation cavity that communicates in proper order from the front to the back, first installation cavity, second installation cavity and third installation cavity are the echelonment that the aperture increases progressively and arrange, the aperture of fourth installation cavity is greater than the aperture of second installation cavity and is less than the aperture of third installation cavity.

Preferably, a first oil seal matched with the first oil seal is arranged in the first installation cavity, a radial spherical plain bearing matched with the second oil seal is arranged in the second installation cavity, a hole clamp spring for preventing the radial spherical plain bearing from axially moving is arranged in the third installation cavity, and a second oil seal matched with the fourth installation cavity is arranged in the fourth installation cavity.

Preferably, the grease nipple is communicated with the upper end of the second mounting cavity.

Preferably, a retainer ring which is coaxially arranged with the second oil seal is arranged at the rear side of the fourth mounting cavity.

Preferably, the radial spherical plain bearing is a self-lubricating radial spherical plain bearing.

Preferably, the inner wall of the second mounting cavity is an arc surface matched with the radial spherical plain bearing.

Compared with the prior art, the invention has the beneficial effects that: the improved camshaft support has the advantages that the original bimetallic lining is replaced by the radial spherical plain bearing, so that the improved camshaft support has multiple performances of large load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning, good lubrication and the like; the first oil seal and the second oil seal are arranged in front of and behind the radial spherical plain bearing, so that the integral dustproof sealing function is improved, the use effect of the radial spherical plain bearing is ensured, and the service life is prolonged; the first installation cavity, the second installation cavity and the third installation cavity are arranged in a stepped mode with gradually increased aperture, and a clamp spring for preventing the radial spherical plain bearing from axially moving is arranged in the third installation cavity, so that the radial spherical plain bearing in the second installation cavity cannot axially move, and the use stability is improved; the invention only optimizes the internal mechanism and does not change the external overall dimension, thereby being convenient to replace the existing camshaft bracket integrally and having good interchangeability.

In sum, the invention has reasonable structural design, and has various performances of large loading capacity, impact resistance, corrosion resistance, abrasion resistance, self-aligning, good lubrication and the like; the use effect is ensured by dustproof sealing, and the service life is prolonged; the axial movement of the radial spherical plain bearing is avoided, and the stability is improved; the size of the device is consistent with the external size of the original device, and the interchangeability is good.

Drawings

FIG. 1 is a front view of a prior art camshaft support;

fig. 2 is a sectional view of a conventional camshaft support in the a-a direction.

Fig. 3 is a front view of a camshaft support.

Fig. 4 is a cross-sectional view of a camshaft support in the direction a-a.

Fig. 5 is a cross-sectional view of a bracket housing in a camshaft bracket.

In the figure, 1-a grease nozzle, 2-a bracket shell, 3-a mounting hole, 31-a first mounting cavity, 32-a second mounting cavity, 33-a third mounting cavity, 34-a fourth mounting cavity, 4-a bimetallic bushing, 5-a radial spherical plain bearing, 6-a first oil seal, 7-a second oil seal, 8-a hole snap spring and 9-a retainer ring.

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.

Referring to fig. 3 to 5, the invention provides a camshaft support, which includes a grease nipple 1 and a support housing 2, wherein a mounting hole 3 is formed in the support housing 2, the mounting hole 3 is provided with a radial spherical plain bearing 5, the radial spherical plain bearing is matched with the mounting hole 3, a first oil seal 6 is arranged in the mounting hole 3 at the front end of the radial spherical plain bearing 5, and a second oil seal 7 is arranged in the mounting hole 3 at the rear end of the radial spherical plain bearing 5.

The mounting hole 3 comprises first installation cavity 31, second installation cavity 32, third installation cavity 33 and fourth installation cavity 34 that communicate in proper order from the front to the back, first installation cavity 31, second installation cavity 32 and third installation cavity 33 are the echelonment arrangement that the aperture increases progressively, the aperture of fourth installation cavity 34 is greater than the aperture of second installation cavity 32 and is less than the aperture of third installation cavity 33.

The oil seal structure is characterized in that a first oil seal 6 matched with the first oil seal is arranged in the first installation cavity 31, a radial spherical plain bearing 5 matched with the second oil seal is arranged in the second installation cavity 32, the upper ends of the grease nipple 1 and the second installation cavity 32 are communicated, a hole clamp spring 8 for preventing the radial spherical plain bearing 5 from axially moving is arranged in the third installation cavity 33, and a second oil seal 7 matched with the fourth installation cavity 34 is arranged in the fourth installation cavity.

Optionally, a retaining ring 9 arranged coaxially with the second oil seal 7 is arranged at the rear side of the fourth mounting cavity 34 to play a role of further blocking dust.

The working principle of the invention is as follows: during assembly, the radial spherical plain bearing 5 is firstly put into the second mounting cavity 32 from the fourth mounting cavity 34 at the rear side, then the snap spring 8 for drilling is arranged in the third mounting cavity 33, and after the assembly is finished, the first oil seal 6 is arranged in the first mounting cavity 31, and the second oil seal 7 is arranged in the fourth mounting cavity 34.

The improved camshaft support has the advantages that the original bimetallic lining 4 is replaced by the radial spherical plain bearing 5, so that the improved camshaft support has multiple performances of large load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning, good lubrication and the like; the first oil seal 6 and the second oil seal 7 are arranged in front of and behind the radial spherical plain bearing 5, so that the integral dustproof sealing function is improved, the use effect of the radial spherical plain bearing 5 is ensured, and the service life is prolonged; the first installation cavity 31, the second installation cavity 32 and the third installation cavity 33 are arranged in a step shape with gradually increased aperture, and the third installation cavity 33 is internally provided with a hole clamp spring 8 for preventing the radial spherical plain bearing 5 from axially moving, so that the radial spherical plain bearing 5 in the second installation cavity 32 cannot axially move, and the use stability is improved; the invention only optimizes the internal mechanism and does not change the external overall dimension, thereby being convenient to replace the existing camshaft bracket integrally and having good interchangeability.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a camshaft support, includes grease nipple and support casing, its characterized in that, the mounting hole that link up around being provided with in the support casing, be provided with the radial spherical plain bearing who matches with it in the mounting hole, be provided with first oil blanket in the mounting hole of radial spherical plain bearing front end, be provided with the second oil blanket in the mounting hole of radial spherical plain bearing rear end.

2. The camshaft support according to claim 1, wherein the mounting hole is composed of a first mounting cavity, a second mounting cavity, a third mounting cavity and a fourth mounting cavity which are sequentially communicated from front to back, the first mounting cavity, the second mounting cavity and the third mounting cavity are arranged in a step shape with gradually increasing apertures, and the aperture of the fourth mounting cavity is larger than that of the second mounting cavity and smaller than that of the third mounting cavity.

3. The camshaft support according to claim 2, wherein a first oil seal adapted to the first mounting cavity is arranged in the first mounting cavity, a radial spherical bearing adapted to the second mounting cavity is arranged in the second mounting cavity, a hole clamp spring for preventing the radial spherical bearing from axially moving is arranged in the third mounting cavity, and a second oil seal adapted to the fourth mounting cavity is arranged in the fourth mounting cavity.

4. A camshaft support as claimed in claim 3, wherein the grease fitting communicates with the upper end of the second mounting chamber.

5. A camshaft support as claimed in claim 3, wherein the rear side of the fourth mounting cavity is provided with a retainer ring arranged coaxially with the second oil seal.

6. A camshaft support according to claim 1, characterized in that the radial spherical plain bearing is a self-lubricating radial spherical plain bearing.

7. A camshaft support as claimed in claim 1, wherein the inner wall of the second mounting cavity is curved to fit the radial spherical plain bearing.