Drive axle brake and vehicle

Abstract

The present invention relates to the field of vehicle engineering technology, and provides a drive axle brake and a vehicle. An annular boss is formed in the axial center of the brake drum, and the boss is provided with a heat dissipation hole. The axis of the heat dissipation hole is arranged at an angle to the axis of the brake drum. A first groove is formed in the inner peripheral wall of the brake drum, and the heat dissipation hole extends through the brake drum and is connected to the first groove at one end. The brake drum is sleeved onto the outside of a brake assembly, and a second groove is formed in the outer peripheral wall of the brake assembly. The first groove and the second groove are aligned to form a heat dissipation channel, and the widthwise side walls of the second groove are located between the widthwise side walls of the first groove. This ensures relatively good heat dissipation between the brake drum and the brake assembly, preventing local overheating. Furthermore, as the friction plate becomes thinner, the widthwise side walls of the second groove can be inserted into the first groove, preventing blockage of the heat dissipation channel and reducing heat dissipation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle engineering, and in particular to a drive axle brake and a vehicle. Background Art

[0002] Heavy-duty wheel-end reduction drive axles are often used on heavy-load dump trucks operating on harsh road conditions. Because dump trucks frequently operate on steep off-road surfaces, frequent braking, long braking distances, and high braking forces can lead to brake drum overheating, which in turn causes drum cracking and failure. Brake drum failure begins in the center of the drum, necessitating improvements in heat dissipation in this area to prevent overheating.

[0003] Therefore, there is an urgent need for a drive axle brake and a vehicle to solve the above technical problems. Summary of the Invention

[0004] The object of the present invention is to provide a drive axle brake and a vehicle, which can achieve relatively good heat dissipation performance between the brake drum and the brake assembly.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Drive axle brakes, including:

[0007] A brake drum, wherein a boss is formed in an axial middle portion of the brake drum, the boss is annularly arranged around the axis of the brake drum, a heat dissipation hole is formed on the boss, the axis of the heat dissipation hole is arranged at an angle to the axis of the brake drum, a first groove is formed on the inner peripheral wall of the brake drum, the first groove is annularly arranged around the axis of the brake drum, the heat dissipation hole penetrates the brake drum and one end of the heat dissipation hole is connected to the first groove;

[0008] Brake assembly, the above-mentioned brake drum is mounted outside the above-mentioned brake assembly, and a second groove is provided on the outer peripheral wall of the above-mentioned brake assembly. The above-mentioned second groove is annular around the axis of the above-mentioned brake assembly, and the above-mentioned first groove is aligned with the above-mentioned second groove to form a heat dissipation channel, and satisfies the radial projection of the above-mentioned brake drum, and the two side walls of the above-mentioned second groove in the width direction are located between the two side walls of the above-mentioned first groove in the width direction.

[0009] As a preferred technical solution of the above-mentioned drive axle brake, the above-mentioned brake drum is an integrally formed cast iron part.

[0010] As a preferred technical solution of the above-mentioned drive axle brake, the above-mentioned brake drum includes an outer shell and an inner core, the above-mentioned outer shell is a steel part, the above-mentioned inner core is a cast iron part, and the above-mentioned outer shell is fixedly sleeved outside the above-mentioned inner core.

[0011] As a preferred technical solution of the above-mentioned drive axle brake, the axial open end of the above-mentioned brake drum is provided with a flange structure, and the above-mentioned flange structure forms an annular structure around the axis of the above-mentioned brake drum.

[0012] As a preferred technical solution of the above-mentioned drive axle brake, the above-mentioned boss is provided with a dynamic balancing processing hole.

[0013] As a preferred technical solution of the above-mentioned drive axle brake, the above-mentioned brake assembly includes a friction plate and a shoe, the above-mentioned friction plate and the above-mentioned shoe are connected by rivets, and the above-mentioned second groove is opened on the above-mentioned friction plate.

[0014] As a preferred technical solution for the above-mentioned drive axle brake, the above-mentioned rivet is a hollow structure, the above-mentioned rivet is provided with a through hole along its axial direction, and ribs are provided at both axial ends of the above-mentioned through hole, and the above-mentioned friction plate and the above-mentioned horseshoe are clamped between the two above-mentioned ribs.

[0015] As a preferred technical solution of the above-mentioned drive axle brake, it also includes a bridge housing, and the above-mentioned brake assembly and the bridge housing are connected by a flange.

[0016] As a preferred technical solution of the above-mentioned drive axle brake, it also includes a wheel-side reducer assembly, and the above-mentioned wheel-side reducer assembly is connected to the above-mentioned brake drum through a flange.

[0017] A vehicle is also provided, comprising the above-mentioned drive axle brake.

[0018] Beneficial effects of the present invention:

[0019] A drive axle brake is provided, comprising a brake drum and a brake assembly. A boss is formed in the axial center of the brake drum, forming an annular structure around the axis of the brake drum. The boss is provided with a heat dissipation hole, the axis of which is arranged at an angle to the axis of the brake drum. A first groove is formed in the inner circumferential wall of the brake drum, forming an annular structure around the axis of the brake drum. The heat dissipation hole extends through the brake drum and one end of the groove is connected to the first groove. The brake drum is sleeved onto the brake assembly. A second groove is formed in the outer circumferential wall of the brake assembly, forming an annular structure around the axis of the brake assembly. The first groove and the second groove are aligned to form a heat dissipation channel, which is aligned with the radial projection of the brake drum. The widthwise side walls of the second groove are located between the widthwise side walls of the first groove. The outer circumferential wall of the brake drum is provided with a first groove, and the outer circumferential wall of the brake assembly is provided with a second groove. The first and second grooves can be assembled to form an annular heat dissipation channel. The brake drum is provided with a heat dissipation hole, which connects the heat dissipation channel to the external environment of the brake drum. In this way, heat generated by the brake drum and brake drum assembly can be quickly dissipated through the heat dissipation channels and heat dissipation holes. This ensures relatively good heat dissipation between the brake drum and the brake assembly, preventing localized overheating. Furthermore, in this embodiment, the first groove is aligned with the second groove, and the width of the first groove is greater than that of the second groove. This ensures that the widthwise side walls of the second groove also face the first groove, meaning that they do not rub against the brake drum. As the friction pad becomes thinner, the widthwise side walls of the second groove can be inserted into the first groove and rotate relative to the brake drum, thus preventing blockage of the heat dissipation channels and the resulting reduction in heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0021] Figure 1 1 is a schematic diagram of the assembly of a drive axle brake provided by an embodiment of the present invention;

[0022] Figure 2 is an exploded schematic diagram of a drive axle brake provided by an embodiment of the present invention;

[0023] Figure 3 is a cross-sectional view of a drive axle brake provided by an embodiment of the present invention;

[0024] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle;

[0025] Figure 5This is a schematic diagram of the structure of the brake drum provided by an embodiment of the present invention. Figure 1 ;

[0026] Figure 6 This is a schematic diagram of the structure of the brake drum provided by an embodiment of the present invention. Figure 2 ;

[0027] Figure 7 This is a schematic diagram of the structure of the brake drum provided by an embodiment of the present invention. Figure 3 ;

[0028] Figure 8 is a structural schematic diagram of a brake assembly provided by an embodiment of the present invention;

[0029] Figure 9 It is a schematic structural diagram of a rivet provided in an embodiment of the present invention.

[0030] In the picture:

[0031] 10. Brake drum; 11. Boss; 12. Heat dissipation hole; 13. First groove; 14. Outer shell; 15. Inner core; 16. Flanged structure; 17. Connecting portion; 18. Fourth threaded hole;

[0032] 20. Brake assembly; 21. Second groove; 22. Friction plate; 23. Horseshoe; 24. Rivet; 241. Through hole; 242. Rib;

[0033] 30. Axle housing; 40. Wheel-side reducer assembly; 50. Wheel hub assembly. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will 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 structures.

[0035] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and 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 the present invention in specific circumstances.

[0036] 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. Furthermore, 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.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not 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 the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0038] like Figures 1 to 9 As shown, the present invention provides a drive axle brake, comprising a brake drum 10 and a brake assembly 20. A boss 11 is formed in the axial middle portion of the brake drum 10. The boss 11 is annular about the axis of the brake drum 10. A heat dissipation hole 12 is formed in the boss 11. The axis of the heat dissipation hole 12 is arranged at an angle to the axis of the brake drum 10. A first groove 13 is formed in the inner circumferential wall of the brake drum 10. The first groove 13 is annular about the axis of the brake drum 10. The heat dissipation hole 12 passes through the brake drum 10 and one end thereof is connected to the first groove 13. The brake drum 10 is sleeved on the outside of the brake assembly 20. A second groove 21 is formed in the outer circumferential wall of the brake assembly 20. The second groove 21 is annular about the axis of the brake assembly 20. The first groove 13 and the second groove 21 are aligned to form a heat dissipation channel that meets the radial projection of the brake drum 10. The widthwise sidewalls of the second groove 21 are located between the widthwise sidewalls of the first groove 13.

[0039] Specifically, the axial end of the brake drum 10 is provided with a stepped structure, including a large-diameter section, a small-diameter section, and a shoulder formed by the large and small-diameter sections. A boss 11 is formed on the large-diameter section. The small-diameter section of the brake drum 10 forms a plug-in portion 17 that is inserted into the brake assembly 20 and docked with the dust cover of the brake assembly 20. The shoulder abuts against the brake assembly 20. The inner circumferential wall of the brake drum 10 cooperates with the friction pad 22 of the brake assembly 20 to generate relative friction.

[0040] During the braking process, the relative friction between the friction plate 22 and the brake drum 10 generates a large amount of heat. If the heat cannot be cooled down in time, the brake drum 10 is prone to cracking and failure.

[0041] To this end, the outer wall of the brake drum 10 is provided with a first groove 13, and the outer wall of the brake assembly 20 is provided with a second groove 21. The first groove 13 and the second groove 21 form an annular heat dissipation channel. Furthermore, the brake drum 10 is provided with heat dissipation holes 12, which connect the heat dissipation channel to the external environment of the brake drum 10. This allows heat generated by the brake drum 10 and the brake drum assembly 10 to be quickly dissipated through the heat dissipation channel and heat dissipation holes 12. This ensures relatively good heat dissipation between the brake drum 10 and the brake assembly 20, preventing localized overheating.

[0042] Furthermore, when the brake assembly 20 and the brake drum 10 rub against each other, the friction plate 22 of the brake assembly 20 wears out, causing the friction plate 22 to become thinner and the second groove 21 to gradually become shallower, resulting in a decrease in its heat dissipation effect. Figure 4 As shown, in this embodiment, the first groove 13 is aligned with the second groove 21, and the width of the first groove 13 is greater than the width of the second groove 21, so that the two side walls of the second groove 21 in the width direction are also opposite to the first groove 13, that is, no friction occurs with the brake drum 10. As the friction plate 22 becomes thinner, the two side walls of the second groove 21 in the width direction can be inserted into the first groove 13 and can rotate relative to the brake drum 10, thereby avoiding blockage of the heat dissipation channel and reducing the heat dissipation efficiency.

[0043] Preferably, the axis of the heat dissipation hole 12 is perpendicular to the axis of the brake drum 10 .

[0044] like Figure 5 As shown, the brake drum 10 is optionally an integrally formed cast iron part. In this way, the brake drum 10 is manufactured by an integral cast iron process, which simplifies the process flow, simplifies the assembly process of the brake drum 10, and can improve the structural strength of the brake drum 10 itself.

[0045] like Figure 6 As shown, in other embodiments, the brake drum 10 includes an outer shell 14 and an inner core 15. The outer shell 14 is made of steel, and the inner core 15 is made of cast iron. The outer shell 14 is fixedly mounted on the outer core 15. In this arrangement, the inner core 15 (cast iron) is used for friction with the friction plate 22, while the outer shell 14 (steel) is used to improve the crack resistance of the brake drum 10.

[0046] like Figure 7 As shown, the axially open end of the brake drum 10 is optionally provided with a flange structure 16, which forms an annular structure around the axis of the brake drum 10. Specifically, the flange structure 16 is formed at the axially open end of the brake drum 10 and is bent toward a side away from the brake drum 10 to form an annular structure, which is used to enhance the structural strength of the brake drum 10 and improve its crack resistance.

[0047] High-speed rotating machinery is often significantly affected by materials. Impact, corrosion, wear, and coking can all cause imbalance in the rotor system. 70% of vibration failures in rotating machinery are caused by rotor imbalance. To address this, the boss 11 is provided with dynamic balancing holes. These holes ensure that the center of mass of the brake drum 10 is aligned with its axis.

[0048] like Figure 8 As shown, the brake assembly 20 optionally includes a friction plate 22 and a shoe 23. The friction plate 22 and the shoe 23 are connected by a rivet 24. The second groove 21 is formed on the friction plate 22. Specifically, the friction plate 22 has an arc surface for mating with the brake drum 10. The friction plate 22 is provided with a plurality of mounting holes distributed around the axis of the brake assembly 20. A portion of the rivet 24 is inserted into the mounting hole, and the other portion passes through the shoe 23 and is fixed thereto.

[0049] Furthermore, the mounting hole is a stepped hole, including a large diameter section, a small diameter section and a shoulder formed by the large diameter section and the small diameter section. One end of the rivet 24 is located in the large diameter section and abuts against the shoulder, and the other end passes through the small diameter section and the horseshoe 23 in sequence and is fixed to the horseshoe 23.

[0050] like Figure 9 As shown, optionally, the rivet 24 is a hollow structure, with a through hole 241 formed along its axial direction, and ribs 242 are provided at both axial ends of the through hole 241, with the friction plate 22 and the shoe 23 being sandwiched between the two ribs 242. Specifically, the rivet 24 is a hollow rivet 24, with a through hole 241 formed along its axis for heat dissipation. In this way, the heat generated during braking can be promptly dissipated through the through hole 241 of the rivet 24.

[0051] Optionally, the drive axle brake further includes an axle housing 30, and the brake assembly 20 and the axle housing 30 are connected via a flange. Specifically, the brake assembly 20 defines a first threaded hole distributed around the axis of the brake assembly 20; the axle housing 30 defines a second threaded hole distributed around the axis of the axle housing 30. The first and second threaded holes correspond one-to-one and are connected via threaded fasteners to form a flange structure, which maintains the stability of the connection between the axle housing 30 and the brake assembly 20.

[0052] Optionally, the drive axle brake further includes a wheel-side reducer assembly 40 and a wheel hub assembly 50. The wheel hub assembly 50, the wheel-side reducer assembly 40, and the brake drum 10 are all connected via flanges. Specifically, the wheel-side reducer assembly 40 is provided with a third threaded hole, which is distributed around the axis of the wheel-side reducer; the brake drum 10 is provided with a fourth threaded hole 18, which is distributed around the axis of the brake drum 10; the third threaded hole and the fourth threaded hole 18 correspond one-to-one and are connected by threaded fasteners to form a flange structure, which can maintain the stability of the connection between the wheel-side reducer assembly 40, the wheel hub assembly 50, and the brake drum 10.

[0053] A vehicle is also provided, comprising the above-mentioned drive axle brake, which can solve the problem of overheating of the brake drum 10 during braking, causing the brake drum 10 to crack and fail.

[0054] Furthermore, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. Drive axle brake, characterized in that: include: A brake drum (10), wherein a boss (11) is formed in the axial middle portion of the brake drum (10), the boss (11) is annular around the axis of the brake drum (10), a heat dissipation hole (12) is provided on the boss (11), the axis of the heat dissipation hole (12) is arranged at an angle to the axis of the brake drum (10), a first groove (13) is provided on the inner peripheral wall of the brake drum (10), the first groove (13) is annular around the axis of the brake drum (10), the heat dissipation hole (12) passes through the brake drum (10) and one end thereof is connected to the first groove (13); A brake assembly (20), wherein the brake drum (10) is sleeved outside the brake assembly (20), and a second groove (21) is provided on the outer peripheral wall of the brake assembly (20), wherein the second groove (21) is annular around the axis of the brake assembly (20), the first groove (13) and the second groove (21) are aligned to form a heat dissipation channel and meet the radial projection of the brake drum (10), and the two side walls of the second groove (21) in the width direction are located between the two side walls of the first groove (13) in the width direction; and the width of the first groove (13) is greater than the width of the second groove (21).

2. The drive axle brake according to claim 1, characterized in that: The brake drum (10) is an integrally formed cast iron part.

3. The drive axle brake according to claim 1, characterized in that: The brake drum (10) comprises an outer shell (14) and an inner core (15), wherein the outer shell (14) is a steel part and the inner core (15) is a cast iron part, and the outer shell (14) is fixedly sleeved outside the inner core (15).

4. The drive axle brake according to claim 1, characterized in that: The axial open end of the brake drum (10) is provided with a flange structure (16), and the flange structure (16) forms an annular structure around the axis of the brake drum (10).

5. The drive axle brake according to claim 1, characterized in that: The boss (11) is provided with a dynamic balancing processing hole.

6. The drive axle brake according to claim 1, characterized in that: The brake assembly (20) comprises a friction plate (22) and a shoe (23), wherein the friction plate (22) and the shoe (23) are connected via rivets (24), and the second groove (21) is provided on the friction plate (22).

7. The drive axle brake according to claim 6, characterized in that: The rivet (24) is a hollow structure. A through hole (241) is provided in the rivet (24) along its axial direction. A retaining edge (242) is provided at both axial ends of the through hole (241). The friction plate (22) and the shoe (23) are sandwiched between the two retaining edges (242).

8. The drive axle brake according to claim 1, characterized in that: It also includes a bridge housing (30), and the brake assembly (20) and the bridge housing (30) are connected via a flange.

9. The drive axle brake according to claim 1, characterized in that: It also includes a wheel-side speed reducer assembly (40) and a wheel hub assembly (50), wherein the wheel hub assembly (50), the wheel-side speed reducer assembly (40) and the brake drum (10) are all connected via flanges.

10. A vehicle, characterized in that The invention comprises the drive axle brake according to any one of claims 1 to 9.

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