Drive axle brake and vehicle

Abstract

The invention relates to the technical field of vehicle engineering, and provides a drive axle brake and a vehicle. An annular boss is formed in the axial middle of a brake drum, a heat dissipation hole is formed in the boss, an included angle is formed between the axis of the heat dissipation hole and the axis of the brake drum, and a first groove is formed in the inner circumferential wall of the brake drum; the heat dissipation holes penetrate through the brake drum, and one ends of the heat dissipation holes communicate with the first groove. The brake assembly is sleeved with the brake drum, a second groove is formed in the peripheral wall of the brake assembly, the first groove and the second groove are aligned to form a heat dissipation channel and meet the radial projection of the brake drum, and the two side walls, in the width direction, of the second groove are located between the two side walls, in the width direction, of the first groove. In this way, the brake drum and the brake assembly can have relatively good heat dissipation performance, and local overheating is avoided. Furthermore, along with the thinning of the friction plate, the two side walls in the width direction of the second groove can be inserted into the first groove, and the situation that the heat dissipation efficiency is reduced due to the fact that the heat dissipation channel is blocked is avoided.

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-side reduction drive axle products are mostly used in dump trucks with heavy loads and bad road conditions. Since dump trucks are often used on off-road roads with large slopes, they brake frequently, with long braking distances and large braking forces, which can lead to overheating of the brake drum, which in turn leads to cracking of the brake drum and failure of the brake drum. The failure of the brake drum cracking starts in the middle of the brake drum, so how to improve the heat dissipation performance of the middle part of the brake drum to avoid overheating is a problem that needs to be solved.

[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 enable a brake drum and a brake assembly to have relatively good heat dissipation performance.

[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 the axial middle portion of the brake drum, the boss is in an annular structure around the axis of the brake drum, a heat dissipation hole is provided 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 provided on the inner peripheral wall of the brake drum, the first groove is in an annular shape around the axis of the brake drum, the heat dissipation hole penetrates the brake drum and one end thereof is connected to the first groove;

[0008] Brake assembly, the brake drum is sleeved outside the brake assembly, a second groove is opened on the outer peripheral wall of the brake assembly, the second groove is annular around the axis of the brake assembly, the first groove is aligned with the second groove to form a heat dissipation channel, and satisfies the radial projection of the brake drum, and the two side walls of the second groove in the width direction are located between the two side walls of the 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 opening 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 arranged 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 middle of the brake drum, the boss is in an annular structure around the axis of the brake drum, a heat dissipation hole is provided on the boss, the axis of the heat dissipation hole is arranged at an angle with the axis of the brake drum, a first groove is provided on the inner peripheral wall of the brake drum, the first groove is in annular shape around the axis of the brake drum, the heat dissipation hole penetrates the brake drum and one end thereof is connected with the first groove; the brake drum is sleeved outside the brake assembly, a second groove is provided on the outer peripheral wall of the brake assembly, the second groove is in annular shape around the axis of the brake assembly, the first groove and the second groove are aligned to form a heat dissipation channel, and meet the radial projection of the brake drum, and the two side walls of the second groove in the width direction are located between the two side walls of the first groove in the width direction. The first groove is provided on the outer peripheral wall of the brake drum, and the second groove is provided on the outer peripheral wall of the brake assembly, the first groove and the second groove can be assembled into an annular heat dissipation channel, and the brake drum is provided with a heat dissipation hole, and the heat dissipation hole connects the heat dissipation channel with the external environment of the brake drum. In this way, the heat generated by the brake drum and the brake drum assembly can be quickly dissipated with the help of the heat dissipation channel and the heat dissipation hole. In this way, the brake drum and the brake assembly can have relatively good heat dissipation performance to avoid local overheating. Further, in this embodiment, the first groove is aligned with the second groove, and the width of the first groove is greater than the width of the second groove, so that the two side walls of the second groove in the width direction are also opposite to the first groove, that is, no friction occurs with the brake drum. As the friction plate becomes thinner, the two side walls of the second groove in the width direction can be inserted into the first groove and can rotate relative to the brake drum, so as to avoid the blockage of the heat dissipation channel and reduce the 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 the description of 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 paying any creative work.

[0021] Figure 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 the middle A;

[0025] Figure 5The structure of the brake drum provided by the embodiment of the present invention is schematically shown in FIG. Figure 1 ;

[0026] Figure 6 The structure of the brake drum provided by the embodiment of the present invention is schematically shown in FIG. Figure 2 ;

[0027] Figure 7 The structure of the brake drum provided by the embodiment of the present invention is schematically shown in FIG. Figure 3 ;

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

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

[0030] In the figure:

[0031] 10. brake drum; 11. boss; 12. heat dissipation hole; 13. first groove; 14. shell; 15. inner core; 16. flange structure; 17. plug-in part; 18. fourth threaded hole;

[0032] 20. brake assembly; 21. second groove; 22. friction plate; 23. horseshoe; 24. rivet; 241. through hole; 242. retaining edge;

[0033] 30. Bridge housing; 40. Wheel reducer assembly; 50. Wheel hub assembly. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] like Figures 1 to 9 As shown, the present invention provides a drive axle brake, including a brake drum 10 and a brake assembly 20. Among them, a boss 11 is formed in the axial middle part of the brake drum 10, and the boss 11 is annular around the axis of the brake drum 10. The boss 11 is provided with a heat dissipation hole 12, and the axis of the heat dissipation hole 12 is set at an angle with the axis of the brake drum 10. The inner peripheral wall of the brake drum 10 is provided with a first groove 13, and the first groove 13 is annular around the axis of the brake drum 10. The heat dissipation hole 12 penetrates the brake drum 10 and one end thereof is connected with the first groove 13; the brake drum 10 is sleeved outside the brake assembly 20, and the outer peripheral wall of the brake assembly 20 is provided with a second groove 21, and the second groove 21 is annular around the axis of the brake assembly 20. The first groove 13 is aligned with the second groove 21 to form a heat dissipation channel, and meets the radial projection of the brake drum 10. 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.

[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 diameter section and the small diameter section, the boss 11 is formed on the large diameter section, the small diameter section of the brake drum 10 forms a plug-in portion 17 inserted into the brake assembly 20, docked with the dust cover of the brake assembly 20, and the shoulder abuts against the brake assembly 20. The inner peripheral wall of the brake drum 10 cooperates with the friction plate 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 temperature cannot be reduced 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 can be assembled into an annular heat dissipation channel, and the brake drum 10 is provided with a heat dissipation hole 12, which connects the heat dissipation channel with the external environment of the brake drum 10. In this way, the heat generated by the brake drum 10 and the brake drum 10 assembly can be quickly dissipated with the help of the heat dissipation channel and the heat dissipation hole 12. In this way, the brake drum 10 and the brake assembly 20 can have relatively good heat dissipation performance to avoid local overheating.

[0042] Furthermore, when the brake assembly 20 and the brake drum 10 are in relative friction, the friction plate 22 of the brake assembly 20 is worn, causing the friction plate 22 to become thinner and the second groove 21 to gradually become shallower, resulting in a decrease in the 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. In this way, the heat dissipation channel is avoided from being blocked, resulting in reduced 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 has a simple 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 a steel part, the inner core 15 is a cast iron part, and the outer shell 14 is fixedly sleeved outside the inner core 15. In this arrangement, the inner core 15 of the cast iron part is used to rub against the friction plate 22, and the outer shell 14 of the steel part is used to improve the anti-cracking performance of the brake drum 10.

[0046] like Figure 7 As shown, optionally, the axial open end of the brake drum 10 is provided with a flange structure 16, and the flange structure 16 forms a ring structure around the axis of the brake drum 10. Specifically, the flange structure 16 is formed at the axial open end of the brake drum 10, and the flange structure 16 is bent toward a side away from the brake drum 10 to form a ring structure, which is used to enhance the structural strength of the brake drum 10 and improve the anti-cracking performance.

[0047] Generally, high-speed rotating machinery is greatly affected by materials. Impact, corrosion, wear and coking will cause unbalanced faults in the rotor system of the machine. 70% of the vibration faults of rotating machinery come from the imbalance of the rotor system. For this reason, the boss 11 is provided with a dynamic balancing processing hole. In this way, by providing the dynamic balancing processing hole, the center of mass of the brake drum 10 coincides with the axis of the brake drum 10.

[0048] like Figure 8 As shown, optionally, the brake assembly 20 includes a friction plate 22 and a shoe 23, the friction plate 22 and the shoe 23 are connected by a rivet 24, and the second groove 21 is formed on the friction plate 22. Specifically, the friction plate 22 is an arc surface for cooperating with the brake drum 10, and a plurality of mounting holes are provided on the friction plate 22, and the mounting holes are distributed around the axis of the brake assembly 20, and a part of the rivet 24 is inserted into the mounting hole, and the other part 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 Fig. 9 As shown, optionally, the rivet 24 is a hollow structure, the rivet 24 is provided with a through hole 241 along its axial direction, and ribs 242 are provided at both axial ends of the through hole 241, and the friction plate 22 and the shoe 23 are sandwiched between the two ribs 242. Specifically, the rivet 24 is a hollow rivet 24, and a through hole 241 is provided along its axis for heat dissipation, so that the heat generated during the braking process can be dissipated in time 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 by a flange. Specifically, the brake assembly 20 is provided with a first threaded hole, and the first threaded hole is distributed around the axis of the brake assembly 20; the axle housing 30 is provided with a second threaded hole, and the second threaded hole is distributed around the axis of the axle housing 30. The first threaded hole corresponds to the second threaded hole one by one, and is connected by a threaded fastener to form a flange structure, which can maintain the connection stability 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, and the wheel hub assembly 50, the wheel-side reducer assembly 40 and the brake drum 10 are all connected by flanges. Specifically, the wheel-side reducer assembly 40 is provided with a third threaded hole, and the third threaded hole is distributed around the axis of the wheel-side reducer; the brake drum 10 is provided with a fourth threaded hole 18, and the fourth threaded hole 18 is distributed around the axis of the brake drum 10; the third threaded hole corresponds to the fourth threaded hole 18 one by one, and is connected by threaded fasteners to form a flange structure, which can maintain the connection stability of 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. Thus, the problem of overheating of the brake drum 10 during braking, which causes the brake drum 10 to crack and fail, can be solved.

[0054] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and 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 in an annular structure 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 with 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 in an annular shape 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) is aligned with the second groove (21) to form a heat dissipation channel and satisfies 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.

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); the outer shell (14) is a steel part, 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 opening 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); the friction plate (22) and the shoe (23) are connected via a rivet (24); and the second groove (21) is formed 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, and retaining edges (242) are provided at both axial ends of the through hole (241), and 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 reducer assembly (40) and a wheel hub assembly (50), wherein the wheel hub assembly (50), the wheel-side 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 as described in any one of claims 1 to 9.

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