Camshaft for brake, brake assembly and vehicle

Abstract

The utility model discloses a cam shaft for a brake, a brake assembly and a vehicle. The cam shaft for the brake comprises a pipe body and a cam shaft, the hollow cam is mounted at one end of the pipe body, and a lightening hole communicated with the center of the pipe body is formed in the hollow cam; and the spline head part is connected to the other end of the pipe body. According to the cam shaft for the brake, the requirement for light weight is met by optimizing the structure of the cam shaft, and meanwhile the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a camshaft for a brake, a brake assembly and a vehicle. Background Art

[0002] As the requirements for automobile energy conservation and emission reduction continue to increase, the lightweighting of automobile parts has also been a topic of discussion and improvement. The load utilization coefficient requirements for commercial vehicles are getting higher and higher, and the brake assembly is a part of it.

[0003] The camshaft used for brakes in the related art is usually manufactured by an integrated forging process, and the overall structure is a solid structure, which is large in size and weight and is relatively bulky, which is not conducive to weight reduction, cost reduction, energy conservation and environmental protection of the entire vehicle. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a camshaft for a brake, which achieves the requirement of lightweight by optimizing its own structure and reduces the production cost at the same time.

[0005] A second aspect of an embodiment of the utility model provides a brake assembly having a camshaft for a brake.

[0006] A third aspect of an embodiment of the utility model provides a vehicle with a brake assembly.

[0007] To achieve the above-mentioned purpose, according to an embodiment of the utility model, a camshaft for a brake is proposed, comprising: a tube body; a hollow cam, wherein the hollow cam is installed at one end of the tube body, and the hollow cam is configured with a weight-reducing hole connected to the center of the tube body; and a spline head, wherein the spline head is connected to the other end of the tube body.

[0008] According to the camshaft for brakes of the embodiment of the utility model, the camshaft for brakes adopts a hollow cam structure, and the hollow cam structure has a weight-reducing hole connected to the center of the tube body. The weight of the camshaft for brakes can be effectively reduced by the hollow structure, while maintaining sufficient strength and stability to achieve the requirement of lightweight. At the same time, the setting of the weight-reducing hole further reduces the use of materials, reduces the overall weight, and saves material costs.

[0009] In addition, even if hollow cams, tube bodies and spline heads of different specifications are used in the camshaft 1 for the brake, they can be freely matched, which can improve the utilization rate of materials and reduce production costs.

[0010] Therefore, the camshaft for the brake according to the embodiment of the utility model realizes the requirement of lightweight by optimizing its own structure, while reducing the production cost.

[0011] According to some specific embodiments of the present utility model, a first cam portion and a second cam portion are configured on two radially opposite sides of the hollow cam.

[0012] According to some specific embodiments of the utility model, a first convex portion and a first concave portion are respectively constructed on both sides of the first cam portion, a second convex portion and a second concave portion are respectively constructed on both sides of the second cam portion, the side surfaces of the first convex portion and the second convex portion form a convex arc surface, and the side surfaces of the first concave portion and the second concave portion form a concave arc surface.

[0013] According to some specific embodiments of the present utility model, a weight-reducing groove is configured at the end of the hollow cam, and the weight-reducing groove surrounds the weight-reducing hole.

[0014] According to some specific embodiments of the present invention, the weight-reducing groove is formed in a conformal manner to the outer contour of the hollow cam.

[0015] According to some specific embodiments of the present utility model, the connection between the groove wall and the groove bottom of the weight-reducing groove is configured with an arc chamfer.

[0016] According to some specific embodiments of the present utility model, a first transition step is configured at a connection between the first cam portion and the tube body, and a second transition step is configured at a connection between the second cam portion and the tube body.

[0017] According to some specific embodiments of the present utility model, the hollow cam is configured with a cam connection portion extending into the interior of one end of the tube body, and the spline portion is configured with a spline connection portion extending into the interior of the other end of the tube body.

[0018] According to an embodiment of the second aspect of the utility model, a brake assembly is proposed, comprising: a brake base plate; a brake shoe assembly, which is swingably mounted on the brake base plate and is configured with a roller; a camshaft for a brake according to the above embodiment of the utility model, wherein the camshaft is suitable for connecting to an adjusting arm through the spline head, and the roller cooperates with the camshaft to rotate to drive the brake shoe assembly to swing.

[0019] The brake assembly according to the embodiment of the utility model realizes the requirement of lightweight by utilizing the camshaft for the brake according to the embodiment of the utility model and optimizing its own structure, while reducing the production cost.

[0020] According to an embodiment of the second aspect of the utility model, a vehicle is provided, comprising a brake assembly according to the above embodiment of the utility model.

[0021] The vehicle according to the embodiment of the utility model achieves the requirement of lightweight by utilizing the brake assembly according to the embodiment of the utility model and optimizing its own structure, while reducing the production cost.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 It is a structural schematic diagram of a camshaft for a brake according to an embodiment of the utility model;

[0025] Figure 2 is a structural schematic diagram of a brake assembly according to an embodiment of the utility model;

[0026] Figure 3 It is a schematic structural diagram of a hollow cam of a camshaft for a brake according to an embodiment of the utility model.

[0027] Reference numerals:

[0028] Camshaft 1 for brake, tube body 100, hollow cam 200, spline head 300,

[0029] The first cam portion 210, the second cam portion 220, the first convex portion 211, the first concave portion 212,

[0030] The second convex portion 221, the second concave portion 222, the first transition step 213, the second transition step 223,

[0031] Cam connection part 230, weight reduction hole 201, weight reduction groove 202, spline connection part 310,

[0032] Brake assembly 10 , brake base plate 11 , brake shoe assembly 12 , roller 13 . DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0036] In the description of the present invention, "multiple" means two or more, and "several" means one or more.

[0037] A camshaft 1 for a brake according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0038] like Figure 1-Figure 3 As shown, a camshaft 1 for a brake according to an embodiment of the present invention includes a tube body 100 , a hollow cam 200 and a spline head 300 .

[0039] The hollow cam 200 is installed at one end of the pipe body 100, and the hollow cam 200 is configured with a lightening hole 201 communicating with the center of the pipe body 100. The spline head 300 is connected to the other end of the pipe body 100.

[0040] For example, the tube body 100 is a thin-walled steel tube structure, which can be matched with the brake assemblies of the front axle and the rear axle. The weight-reducing hole 201 can be a structure connected to the central through hole of the tube body 100. The tube body 100, the hollow cam 200 and the spline head 300 can be connected and fixed together by methods including but not limited to friction welding, welding and riveting.

[0041] According to the camshaft 1 for brakes of the embodiment of the utility model, the camshaft 1 for brakes adopts a hollow cam 200 structure, and the hollow cam 200 is configured with a weight-reducing hole 201 connected to the center of the tube body 100. The weight of the camshaft 1 for brakes can be effectively reduced by the hollow structure, while maintaining sufficient strength and stability to achieve the requirement of lightweight. At the same time, the setting of the weight-reducing hole 201 further reduces the use of materials, reduces the overall weight, and saves material costs. The hollow cam 200 adopts a forging process, and the construction of the weight-reducing hole 201 will not affect the structural strength of the hollow cam 200.

[0042] Therefore, the camshaft 1 for a brake according to the embodiment of the utility model achieves the requirement of lightweight by optimizing its own structure, while reducing the production cost.

[0043] In addition, even if the hollow cam 200, the tube body 100 and the spline head 300 of different specifications are used in the camshaft 1 for the brake, they can be freely matched, which can improve the utilization rate of materials and reduce the production cost.

[0044] In some specific embodiments of the present invention, Figure 3 As shown, the first cam portion 210 and the second cam portion 220 are constructed on two radially opposite sides of the hollow cam 200. The first cam portion 210 and the second cam portion 220 are coaxially arranged. Through the rotation of the hollow cam 200, the first cam portion 210 and the second cam portion 220 rub against or contact other components, thereby transmitting force to the brake assembly to achieve the braking function. At the same time, the hollow cam 200 has a lighter weight than the solid cam, which can reduce the mass of the entire camshaft 1 used for the brake, improve the dynamic response speed of the brake assembly and the accuracy of braking, and the hollow cam 200 can also provide better heat dissipation performance, prevent the braking force from being attenuated due to overheating, and increase the stability of the brake.

[0045] In some specific embodiments of the utility model, the first cam portion 210 is respectively configured with a first convex portion 211 and a first concave portion 212 on both sides. The second cam portion 220 is respectively configured with a second convex portion 221 and a second concave portion 222 on both sides. The side surfaces of the first convex portion 211 and the second convex portion 221 form a convex arc surface, and the side surfaces of the first concave portion 212 and the second concave portion 222 form a concave arc surface. The structure of the convex arc surface and the concave arc surface can increase the connection stability between the hollow cam 200 and other components. Through the cooperation of the convex and concave structures, the gap and relative sliding of the connection parts are reduced, ensuring the firm connection between the camshaft 1 used for the brake and other components during operation, and improving the stability of the overall structure.

[0046] In some specific embodiments of the present invention, Figure 1-Figure 3 As shown, the end of the hollow cam 200 is constructed with a weight-reducing groove 202, and the weight-reducing groove 202 surrounds the weight-reducing hole 201. The structure of the weight-reducing groove 202 can effectively reduce the weight of the hollow cam 200. By adding the weight-reducing groove 202 to the end of the hollow cam 200, a portion of the material can be removed, thereby reducing the overall weight. The lighter camshaft 1 for brakes can reduce the overall mass of the vehicle and improve the performance of the brake assembly. At the same time, the weight-reducing groove 202 can increase the surface area of ​​the hollow cam 200, thereby improving its heat dissipation effect during operation. By increasing the heat dissipation surface area, the hollow cam 200 can dissipate heat more effectively, prevent overheating, and ensure the stability and reliability of the camshaft 1 for brakes.

[0047] In some specific embodiments of the present invention, Figure 1 and Figure 3 As shown, the weight-reducing groove 202 is formed in conformity with the outer contour of the hollow cam 200. The conformity of the weight-reducing groove 202 with the outer contour of the hollow cam 200 can enhance the overall structural strength of the camshaft 1 for the brake to a certain extent. Since the weight-reducing groove 202 is consistent with the shape of the outer contour, the weight of the camshaft 1 for the brake can be reduced without changing the stability of the original structure, which not only realizes the lightweight design, but also ensures the strength and stability of the camshaft, and improves the overall performance and reliability. In addition, the weight-reducing groove 202 can reduce the inertial mass of the camshaft 1 for the brake, thereby reducing the inertial force during its rotation, thereby reducing the inertial force during its rotation and improving the accuracy of the brake assembly. At the same time, the structure of the weight-reducing groove 202 is consistent with the outer contour structure, making the overall appearance more smooth and refined, and improving the aesthetics of the hollow cam 200.

[0048] In some specific embodiments of the present invention, Figure 1 As shown, the connection between the groove wall and the groove bottom of the weight-reducing groove 202 is constructed with an arc chamfer. The chamfer of the arc structure can reduce the sharp angle of the connection between the groove wall and the groove bottom of the weight-reducing groove 202. During the operation of the camshaft 1 used for the brake, the weight-reducing groove 202 is in a stress state. The chamfer structure can reduce the degree of stress concentration, avoid fatigue damage caused by excessive local stress, and improve the durability and reliability of the hollow cam 200. In addition, the chamfer structure improves the smoothness and continuity of the connection, increases the aesthetics of the camshaft 1 used for the brake, and improves the quality of the product.

[0049] In some specific embodiments of the present invention, Figure 1 and Figure 3 As shown, the first cam portion 210 is configured with a first transition step 213 at the connection with the pipe body 100 , and the second cam portion 220 is configured with a second transition step 223 at the connection with the pipe body 100 .

[0050] The existence of the first transition step 213 and the second transition step 223 makes the connection between the first cam portion 210 and the second cam portion 220 and the tube body 100 smoother. By providing the first transition step 213 and the second transition step 223, the sudden change or angle at the connection can be effectively reduced, making the transition smoother and continuous, avoiding discontinuous surfaces that may cause stress concentration and wear, and the smooth transition helps to improve the durability and reliability of the components.

[0051] At the same time, the arrangement of the first transition step 213 and the second transition step 223 can improve the assembly accuracy between the camshaft 1 for the brake and other components. Through the structure of the first transition step 213 and the second transition step 223, the connection between the camshaft 1 for the brake and the brake assembly 10 can be more easily aligned and assembled, ensuring the accuracy and stability of the connection. Good assembly accuracy helps to improve the overall performance and reliability of the brake assembly 10.

[0052] In some specific embodiments of the present invention, Figure 1 As shown, the hollow cam 200 is configured with a cam connection portion 230 extending into the interior of one end of the tube body 100, and the spline head portion 300 is configured with a spline connection portion 310 extending into the other end of the tube body 100. The arrangement of the cam connection portion 230 and the spline connection portion 310 can make the structure between the hollow cam 200, the spline head portion 300 and the tube body 100 more coherent and tight. The existence of the cam connection portion 230 and the spline connection portion 310 can ensure the tight connection between the components, prevent loosening during use, and ensure the stability and reliability of the overall structure of the camshaft 1 used for the brake.

[0053] The brake assembly 10 according to an embodiment of the present invention is described below.

[0054] According to the brake assembly 10 of the embodiment of the utility model, Figure 2 As shown, the camshaft 1 for brakes, the brake base plate 11 and the brake shoe assembly 12 according to the above embodiment of the utility model are included. The brake shoe assembly 12 is swingably mounted on the brake base plate 11 and is configured with a roller 13. The camshaft 1 for brakes is suitable for connecting the adjustment arm through the spline head 300, and the roller 13 cooperates with the camshaft 1 for brakes to rotate to drive the brake shoe assembly 12 to swing.

[0055] The rotation of the camshaft 1 used for the brake drives the roller 13 to rotate together, and the movement of the roller 13 will drive the brake shoe assembly 12 matched therewith to swing. The structure of the spline head 300 connecting the adjustment arm enables the swing of the brake shoe assembly 12 to achieve the desired effect, and can be adjusted as needed to ensure the working effect and stability of the brake assembly 1.

[0056] According to the brake assembly 10 of the above embodiment of the utility model, by utilizing the camshaft 1 for the brake according to the embodiment of the utility model, the requirement of lightweight is achieved by optimizing its own structure, while reducing the production cost.

[0057] A vehicle according to an embodiment of the present invention is described below.

[0058] A vehicle according to an embodiment of the present utility model includes the brake assembly 10 according to the above embodiment of the present utility model.

[0059] According to the vehicle of the above embodiment of the utility model, by utilizing the brake assembly 10 according to the embodiment of the utility model, the requirement of lightweight is achieved by optimizing its own structure, while reducing the production cost.

[0060] Other structures and operations according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0062] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A camshaft for a brake, characterized in that: include: tube body; A hollow cam, the hollow cam being mounted on one end of the tube body, the hollow cam being configured with a weight-reducing hole communicating with the center of the tube body; A spline head is connected to the other end of the tube body.

2. The camshaft for a brake according to claim 1, characterized in that: The hollow cam is provided with a first cam portion and a second cam portion on two opposite radial sides thereof.

3. The camshaft for a brake according to claim 2, characterized in that: The first cam portion has a first convex portion and a first concave portion on both sides, and the second cam portion has a second convex portion and a second concave portion on both sides. The side surfaces of the first convex portion and the second convex portion form convex arc surfaces, and the side surfaces of the first concave portion and the second concave portion form concave arc surfaces.

4. The camshaft for a brake according to claim 2, characterized in that: A weight-reducing groove is configured at the end of the hollow cam, and the weight-reducing groove surrounds the weight-reducing hole.

5. The camshaft for a brake according to claim 4, characterized in that: The weight-reducing groove is configured to conform to the outer contour of the hollow cam.

6. The camshaft for a brake according to claim 4, characterized in that: The connection between the groove wall and the groove bottom of the weight-reducing groove is configured with an arc chamfer.

7. The camshaft for a brake according to claim 4, characterized in that: The first cam portion is configured with a first transition step at a connection with the tube body, and the second cam portion is configured with a second transition step at a connection with the tube body.

8. The camshaft for a brake according to claim 1, characterized in that: The hollow cam is configured with a cam connection portion extending into one end of the tube body, and the spline head is configured with a spline connection portion extending into the other end of the tube body.

9. A brake assembly, characterized in that: include: Brake base plate; A brake shoe assembly, the brake shoe assembly being swingably mounted on the brake base plate and being configured with a roller ； According to the camshaft for brakes according to any one of claims 1-8, the camshaft for brakes is suitable for connecting to an adjusting arm through the spline head, and the roller cooperates with the camshaft for brakes to rotate to drive the brake shoe assembly to swing.

10. A vehicle, characterized in that: include: A brake assembly as claimed in claim 9.

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