Brake camshaft lubricating structure

By designing oil grooves and sealing components on the brake camshaft, the problem of poor lubrication effect of the camshaft in rainy and snowy weather is solved, and good lubrication and sealing effect is achieved to prevent stagnation and smooth movement.

CN223270579UActive Publication Date: 2025-08-26GUANGZHOU YADEA LOCOMOTIVE CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422537580.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-21
Publication Date
2025-08-26
Estimated Expiration
2034-10-21

AI Technical Summary

Technical Problem

The brake camshaft is prone to stagnation and poor movement during rainy and snowy weather and wading sections. The reason is that moisture and mud and dust enter the camshaft, resulting in poor grease lubrication effect.

Method used

A brake camshaft lubrication structure is designed, including a camshaft body, a drum cover and a sealing assembly. An oil groove is provided on the camshaft body, and the oil groove is arranged on the outer periphery. The sealing assembly is sealed with both ends of the oil groove by the first and second seals to prevent grease from oozing out and prevent dust and moisture from entering, ensuring lubrication effect.

Benefits of technology

Effectively prevent grease from leaking out and external pollutants from entering, solve the problems of rocker arm stagnation and unsmooth movement, and improve the lubrication effect and sealing.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223270579U_ABST
    Figure CN223270579U_ABST
Patent Text Reader

Abstract

The utility model belongs to the technical field of vehicle braking, and discloses a brake cam shaft lubricating structure which comprises a cam shaft, a drum cover and a sealing piece, the cam shaft comprises a cam shaft body, the drum cover is sleeved on the cam shaft body, the cam shaft body is provided with an oil groove, and the oil groove is arranged around the periphery of the cam shaft body. The groove is located between the outer circumferential face of the camshaft body and the inner circumferential face of the drum cover, the lubricating grease is used for lubricating the camshaft and the drum cover, the lubricating effect is good, the sealing assembly comprises a first sealing piece and a second sealing piece, and the first sealing piece and the second sealing piece are located at the two ends of the oil groove in the axis direction of the camshaft correspondingly and located in the circumferential direction of the camshaft. The first sealing piece and the second sealing piece are clamped between the camshaft body and the drum cover, the first sealing piece and the second sealing piece can prevent lubricating grease in the oil groove from seeping out of the two ends of the camshaft body and can also prevent dust and water from entering the position between the drum cover and the camshaft body, and the sealing effect is good.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle braking, in particular to a brake camshaft lubrication structure. Background Art

[0002] Brakes are typically mounted on axles, where the brake assembly, consisting of brake shoes, a brake drum, and a brake actuation cam, is installed. The brake shoes are arranged opposite each other, with friction pads on their outer surfaces. When the vehicle brakes, the brake actuation cam rotates, causing the two brake shoes to swing outward. The friction pads on the outer surfaces of the swung brake shoes press against the inner side of the brake drum, generating braking force that slows the wheels or stops the vehicle in the shortest possible distance, ensuring driving safety.

[0003] During the operation of the brake, in rainy, snowy weather and flooded roads, the brake rocker arm will get stuck and move unevenly. The reason is that water, mud and dust enter the camshaft connected to the rocker arm, and the grease mixes with the water and dust, causing the lubricating effect of the grease to deteriorate, thus causing the rocker arm to get stuck.

[0004] Therefore, a brake camshaft lubrication structure is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a brake camshaft lubrication structure for lubricating the camshaft and the drum cover. At the same time, it can not only prevent grease from leaking from both ends of the camshaft body, but also prevent dust and moisture from entering between the drum cover and the camshaft, thereby solving the problems of rocker arm sticking and uneven movement.

[0006] In order to solve the above problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] Brake camshaft lubrication structure, including:

[0008] A camshaft, the camshaft comprising a camshaft body, the camshaft body being provided with an oil groove, the oil groove being arranged around the outer circumference of the camshaft body;

[0009] a drum cover, the drum cover being sleeved on the camshaft body;

[0010] A sealing assembly, comprising a first seal and a second seal. Along the axial direction of the camshaft, the first seal and the second seal are respectively located at both ends of the oil groove. Along the circumferential direction of the camshaft, the first seal and the second seal are both sandwiched between the camshaft body and the drum cover.

[0011] Preferably, the oil groove has a spiral structure.

[0012] Preferably, the oil groove has a first end and a second end, the first sealing member seals the first end, and the second sealing member seals the second end.

[0013] Preferably, there are multiple first seals, and the multiple first seals are arranged at intervals along the axial direction of the camshaft.

[0014] Preferably, there are multiple second seals, and the multiple second seals are arranged at intervals along the axial direction of the camshaft.

[0015] Preferably, the brake camshaft lubrication structure also includes a shoe, which is connected to the drum cover and is provided with a mounting hole. The camshaft also includes a connecting section, which is connected to one end of the camshaft body and is connected to the shoe through the mounting hole.

[0016] Preferably, the connecting section includes a connecting portion and two limiting portions, the connecting portion is arranged between the two limiting portions, the connecting portion is fixedly arranged in the mounting hole, and the two limiting portions respectively abut against both end surfaces of the shoe.

[0017] Preferably, the cross-section of the connecting portion is a rectangular structure.

[0018] Preferably, the brake camshaft lubrication structure further includes a rocker arm, the rocker arm is provided with a connecting hole, the camshaft further includes a mounting section, the mounting section is connected to the other end of the camshaft body, and the mounting section is connected to the rocker arm through the connecting hole.

[0019] Preferably, the mounting section includes a recessed portion and two mounting portions, the recessed portion is arranged between the two mounting portions, the recessed portion is fixedly arranged in the connecting hole, and the two mounting portions are respectively arranged at both end openings of the connecting hole.

[0020] The beneficial effects of the utility model are:

[0021] The utility model provides a brake camshaft lubrication structure, wherein a drum cover is sleeved on a camshaft body, and the camshaft body is provided with an oil groove for storing grease. The oil groove is arranged around the outer periphery of the camshaft body and is located between the outer peripheral surface of the camshaft body and the inner peripheral surface of the drum cover. The grease is used to lubricate the camshaft and the drum cover, and the lubrication effect is good. The sealing assembly includes a first seal and a second seal. Along the axial direction of the camshaft, the first seal and the second seal are respectively located at both ends of the oil groove. Along the circumferential direction of the camshaft, the first seal and the second seal are both sandwiched between the camshaft body and the drum cover. The first seal and the second seal can not only prevent the grease in the oil groove from leaking out from the two ends of the camshaft body, but also prevent dust and moisture from entering between the drum cover and the camshaft body, resulting in a good sealing effect, thereby solving the problems of rocker arm jamming and uneven movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a brake camshaft lubrication structure provided by an embodiment of the present utility model;

[0023] Figure 2 This is a schematic structural diagram of a camshaft provided in an embodiment of the utility model.

[0024] Reference numerals:

[0025] 1. Camshaft; 11. Camshaft body; 111. Oil groove; 12. Connecting section; 121. Connecting portion; 122. Position limiting portion; 13. Mounting section; 131. Recessed portion; 132. Mounting portion;

[0026] 2. Drum cover;

[0027] 3. First seal;

[0028] 4. Second sealing member;

[0029] 5. Hoof blocks;

[0030] 6. Rocker arm. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0032] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0035] like Figure 1-Figure 2As shown, in this embodiment, the brake camshaft lubrication structure includes a camshaft 1, a drum cover 2, and a seal. The camshaft 1 includes a camshaft body 11, which is provided with an oil groove 111. The oil groove 111 is arranged around the outer circumference of the camshaft body 11, and the drum cover 2 is sleeved on the camshaft body 11. The sealing assembly includes a first seal 3 and a second seal 4. Along the axial direction of the camshaft 1, the first seal 3 and the second seal 4 are respectively located at both ends of the oil groove 111. Along the circumferential direction of the camshaft 1, the first seal 3 and the second seal 4 are both sandwiched between the camshaft body 11 and the drum cover 2. Specifically, the drum cover 2 is sleeved on the camshaft body 11, and the outer circumferential surface of the camshaft body 11 is provided with an oil groove 111. The oil groove 111 is located between the outer circumferential surface of the camshaft body 11 and the inner circumferential surface of the drum cover 2. The oil groove 111 is used to store grease, which is used to lubricate the camshaft 1 and the drum cover 2, achieving a good lubrication effect. The first seal 3 and the second seal 4 are sealing rings made of rubber material. The first seal 3 is located at the opening at one end of the drum cover 2 and is sleeved on the camshaft body 11. The second seal 4 is located at the opening at the other end of the drum cover 2 and is sleeved on the camshaft body 11. At this time, the oil groove 111 is located between the first seal 3 and the second seal 4. The first seal 3 and the second seal 4 can not only prevent the grease in the oil groove 111 from seeping out from both ends of the camshaft body 11, but also prevent dust and moisture from entering between the drum cover 2 and the camshaft body 11. The sealing effect is good, thereby solving the problem of the rocker arm 6 getting stuck and moving unevenly.

[0036] Further, continue to refer to Figure 1-Figure 2 The oil groove 111 has a spiral structure. Specifically, along the axis of the camshaft 1, the spiral oil groove 111 winds around the outer circumference of the camshaft body 11 from one end to the other, greatly extending the length of the oil groove 111 and increasing the volume of grease contained in the oil groove 111. While storing grease, it can also extend the service life of the grease and increase the retention time of the grease.

[0037] Further, continue to refer to Figure 1-Figure 2 The oil groove 111 has a first end and a second end. The first seal 3 seals the first end, and the second seal 4 seals the second end. Specifically, the oil groove 111 is located between the first seal 3 and the second seal 4. The first seal 3 is located at the first end of the oil groove 111, and the second seal 4 is located at the second end of the oil groove 111. Both the first seal 3 and the second seal 4 are sleeved on the camshaft body 11. This not only prevents the grease in the oil groove 111 from leaking out of both ends of the camshaft body 11, but also prevents dust and moisture from entering between the drum cover 2 and the camshaft body 11, thereby resolving the problem of the rocker arm 6 getting stuck and moving unsmoothly.

[0038] Optionally, there are multiple first seals 3, and the multiple first seals 3 are arranged at intervals along the axial direction of the camshaft 1. There are multiple second seals 4, and the multiple second seals 4 are arranged at intervals along the axial direction of the camshaft 1. This can further improve the waterproof and dust-proof effects, and at the same time, further improve the sealing effect of the oil groove 111 of the camshaft 1.

[0039] Further, continue to refer to Figure 1-Figure 2 The brake camshaft lubrication structure also includes a shoe 5, which is connected to the drum cover 2. The shoe 5 is provided with a mounting hole. The camshaft 1 also includes a connecting section 12, which is connected to one end of the camshaft body 11. The connecting section 12 is connected to the shoe 5 through the mounting hole. Specifically, the connecting section 12 includes a connecting portion 121 and two limiting portions 122. The connecting portion 121 is provided between the two limiting portions 122. The connecting portion 121 is fixedly provided in the mounting hole. The two limiting portions 122 respectively abut against the two end surfaces of the shoe 5. The shoe 5 is provided between the two limiting portions 122. The limiting portion 122 plays a role in fixing and limiting the shoe 5, ensuring that the shoe 5 is fixed on the connecting portion 121. Under the action of the connecting section 12, the shoe 5 can rotate around the camshaft body 11 and perform reciprocating rotational motion to expand the shoe 5 to form an expansion die. Preferably, the cross-section of the connecting portion 121 is a rectangular structure to prevent the shoe 5 from moving relative to the connecting portion 121 in the circumferential direction, and the connection is stable and does not need to be loosened.

[0040] Further, continue to refer to Figure 1-Figure 2 The brake camshaft lubrication structure also includes a rocker arm 6, which is provided with a connecting hole. The camshaft 1 also includes a mounting section 13. The mounting section 13 is connected to the other end of the camshaft body 11. The mounting section 13 is connected to the rocker arm 6 through the connecting hole. Specifically, the mounting section 13 includes a recessed portion 131 and two mounting portions 132. The recessed portion 131 is provided between the two mounting portions 132. The recessed portion 131 is fixedly provided in the connecting hole, and the two mounting portions 132 are respectively provided at the two end openings of the connecting hole. The rocker arm 6 is connected to the mounting section 13. Along the axial direction of the camshaft 1, the recessed portion 131 can prevent the rocker arm 6 from moving and has a certain limiting effect, so that the rocker arm 6 can rotate around the camshaft 1.

[0041] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. The brake camshaft lubrication structure is characterized by: include: A camshaft (1), the camshaft (1) comprising a camshaft body (11), the camshaft body (11) being provided with an oil groove (111), the oil groove (111) being arranged around the outer circumference of the camshaft body (11); A drum cover (2), wherein the drum cover (2) is sleeved on the camshaft body (11); A sealing assembly, comprising a first sealing member (3) and a second sealing member (4); along the axial direction of the camshaft (1), the first sealing member (3) and the second sealing member (4) are respectively located at two ends of the oil groove (111); along the circumferential direction of the camshaft (1), the first sealing member (3) and the second sealing member (4) are both sandwiched between the camshaft body (11) and the drum cover (2).

2. The brake camshaft lubrication structure according to claim 1, characterized in that: The oil groove (111) has a spiral structure.

3. The brake camshaft lubrication structure according to claim 1, characterized in that: The oil groove (111) has a first end and a second end, the first sealing member (3) blocks the first end, and the second sealing member (4) blocks the second end.

4. The brake camshaft lubrication structure according to claim 1, characterized in that: There are multiple first sealing members (3), and the multiple first sealing members (3) are arranged at intervals along the axial direction of the camshaft (1).

5. The brake camshaft lubrication structure according to claim 1, characterized in that: There are multiple second sealing members (4), and the multiple second sealing members (4) are arranged at intervals along the axial direction of the camshaft (1).

6. The brake camshaft lubrication structure according to claim 1, characterized in that: The brake camshaft lubrication structure further comprises a shoe (5), the shoe (5) being connected to the drum cover (2), the shoe (5) being provided with a mounting hole, and the camshaft (1) further comprising a connecting section (12), the connecting section (12) being connected to one end of the camshaft body (11), the connecting section (12) being connected to the shoe (5) via the mounting hole.

7. The brake camshaft lubrication structure according to claim 6, characterized in that: The connecting section (12) comprises a connecting portion (121) and two limiting portions (122), wherein the connecting portion (121) is arranged between the two limiting portions (122), the connecting portion (121) is fixedly arranged in the mounting hole, and the two limiting portions (122) respectively abut against the two end surfaces of the shoe (5).

8. The brake camshaft lubrication structure according to claim 7, characterized in that: The cross-sectional shape of the connecting portion (121) is a rectangular structure.

9. The brake camshaft lubrication structure according to claim 1, characterized in that: The brake camshaft lubrication structure further comprises a rocker arm (6), wherein the rocker arm (6) is provided with a connecting hole, and the camshaft (1) further comprises a mounting section (13), wherein the mounting section (13) is connected to the other end of the camshaft body (11), and the mounting section (13) is connected to the rocker arm (6) via the connecting hole.

10. The brake camshaft lubrication structure according to claim 9, characterized in that: The mounting section (13) comprises a recessed portion (131) and two mounting portions (132), wherein the recessed portion (131) is arranged between the two mounting portions (132), the recessed portion (131) is fixedly arranged in the connecting hole, and the two mounting portions (132) are respectively arranged at the two end openings of the connecting hole.