阅读说明：本技术 一种矿用车鼓式制动器 (Drum brake for mine truck ) 是由 齐学先 林玮静 焦同振 于 2021-09-18 设计创作，主要内容包括：本发明公开了一种矿用车鼓式制动器,包括制动鼓、凸轮轴、支销、制动蹄总成、限位板、锁紧螺母、凸轮轴支架、油封和转向节,所述制动底板设有制动底板支销孔、通过螺栓固定在转向节上,所述凸轮轴支架与油封组成合件、通过螺栓固定在转向节侧方；所述凸轮轴为阶梯轴,轴径上设有卡簧槽,实现轴向定位,支承凸轮轴的凸轮轴支架固定在转向节侧方；凸轮轴穿过制动底板、凸轮轴支架和油封的合件；所述制动蹄总成通过回位弹簧和制动凸轮轴保持接触,制动时通过凸轮轴转动来张开制动蹄总成,直至制动蹄总成压紧制动鼓实现制动。本发明在保证制动性能基础上实现了制动器结构紧凑、制动零部件可靠性高和数量少的特点,完全满足大型矿用车使用要求。(The invention discloses a mining vehicle drum type brake, which comprises a brake drum, a camshaft, a support pin, a brake shoe assembly, a limiting plate, a locking nut, a camshaft bracket, an oil seal and a steering knuckle, wherein the brake bottom plate is provided with a brake bottom plate support pin hole and is fixed on the steering knuckle through a bolt; the camshaft is a stepped shaft, a clamp spring groove is arranged on the shaft diameter to realize axial positioning, and a camshaft support for supporting the camshaft is fixed on the side of the steering knuckle; the cam shaft penetrates through a combined part of the brake bottom plate, the cam shaft bracket and the oil seal; the brake shoe assembly is kept in contact with the brake cam shaft through the return spring, and the brake shoe assembly is opened through rotation of the cam shaft during braking until the brake shoe assembly presses the brake drum to achieve braking. The invention realizes the characteristics of compact structure, high reliability of braking parts and small quantity of the brake on the basis of ensuring the braking performance, and completely meets the use requirement of large mining vehicles.)

1. A mining vehicle drum brake is characterized in that: the brake device comprises a brake drum (1), a camshaft (3), a supporting pin (6), a brake shoe assembly (7), a limiting plate (8), a locking nut (9), a camshaft bracket (11), an oil seal (12) and a steering knuckle (14), wherein the brake base plate (2) is provided with a brake base plate supporting pin hole and is fixed on the steering knuckle (14) through a bolt, and the camshaft bracket (11) and the oil seal (12) form a combined part and are fixed on the side of the steering knuckle (14) through the bolt; the camshaft (3) is a stepped shaft, a clamp spring groove is formed in the shaft diameter to achieve axial positioning, and a camshaft support (11) for supporting the camshaft (3) is fixed on the side of the steering knuckle (14); the camshaft (3) passes through a combined part of the brake bottom plate (2), the camshaft bracket (11) and the oil seal (12); the brake shoe assembly (7) is kept in contact with the brake cam shaft (3) through the return spring (5), and the brake shoe assembly (7) is opened through rotation of the cam shaft (3) during braking until the brake shoe assembly (7) presses the brake drum (1) to achieve braking.

2. A mining drum brake according to claim 1, characterized in that: a round pin (6) one end is equipped with flange and spacing platform structure, and the round pin hole of brake shoe assembly (7) and the round pin hole of brake shoe (2) are aligned, and two round pins (6) pass brake shoe assembly (7), and the flange of round pin (6) and the spacing back of brake shoe contact, limiting plate (8) are packed into to one end in addition, are fixed brake shoe (2) on with round pin (6) through lock nut (9).

3. A mining drum brake according to claim 1, characterized in that: the sealing of camshaft (3) bearing is realized through proprietary oil blanket (12) and is sealed, proprietary oil blanket (12) adopt one-way oil blanket to add L type supporting structure that has the guard action.

4. A mining drum brake according to claim 1, characterized in that: the diameter of the friction plate of the brake drum (1) is optimized to be 580 mm.

5. A mining drum brake according to claim 1, characterized in that: the vertical distance between the center of the brake and the support pin (6) is 235-245 mm; the vertical distance between the center of the brake and the camshaft (3) is 225-235 mm.

6. A mining drum brake according to claim 1, characterized in that: the vertical distance between the center of the brake and the support pin (6) is 241 mm; the vertical distance between the center of the brake and the camshaft (3) is 232 mm.

7. A mining drum brake according to claim 1, characterized in that: the distance d between the left support pin and the right support pin (6) of the brake is 70-88 mm.

8. A mining drum brake according to claim 1, characterized in that: the distance d between the left support pin and the right support pin (6) of the brake is 76 mm.

9. A mining drum brake according to any one of claims 1 to 8, characterised in that: the inner diameter and the outer diameter of the friction plate of the brake drum (1) are designed in a non-concentric mode.

Technical Field

The invention relates to a mining truck brake, in particular to a mining truck drum brake, and belongs to the technical field of truck manufacturing.

Background

The existing commercial vehicle drum brake generally adopts an integrated structure of a camshaft support and an air chamber support, and meanwhile, a brake shoe supporting end is of a U-shaped opening structure and is clamped on a supporting pin of a brake bottom plate through a return spring, so that the brake has the tendency of disengaging from the supporting pin when in work. On a large-scale mining vehicle brake, due to the limitation of the wheel edge structure of a mining vehicle, when the existing drum brake is matched, the existing drum brake is directly interfered with a steering knuckle and a hub bearing, and due to the limitation of the structure of the existing drum brake, the matching requirement of the large-scale mining vehicle cannot be met; with the increase of the bearing tonnage of the large mining truck, the required braking force is increased. The existing drum brake can not meet the braking torque requirement of a large mining truck, and the braking performance of the brake can not be matched with that of the large mining truck.

Disclosure of Invention

The invention aims to solve the technical problem of providing a drum brake of a mining automobile aiming at the defects in the prior art so as to meet the braking requirement of a large mining automobile.

In order to solve the technical problem, the invention provides a drum brake for a mining truck, which comprises a brake drum, a camshaft, a support pin, a brake shoe assembly, a limiting plate, a locking nut, a camshaft bracket, an oil seal and a steering knuckle, wherein the brake base plate is provided with a support pin hole of a brake base plate and is fixed on the steering knuckle through a bolt; the camshaft is a stepped shaft, a clamp spring groove is arranged on the shaft diameter to realize axial positioning, and a camshaft support for supporting the camshaft is fixed on the side of the steering knuckle; the cam shaft penetrates through a combined part of the brake bottom plate, the cam shaft bracket and the oil seal; the brake shoe assembly is kept in contact with the brake cam shaft through the return spring, and the brake shoe assembly is opened through rotation of the cam shaft during braking until the brake shoe assembly presses the brake drum to achieve braking.

A flange and a limiting table structure are arranged at one end of the supporting pin, a supporting pin hole of the brake shoe assembly is aligned with a supporting pin hole of the brake bottom plate, the two supporting pins penetrate through the brake shoe assembly, the other end of the supporting pin is installed into the limiting plate after the flange of the supporting pin is contacted and limited with the brake shoe, and the supporting pin is fixed on the brake bottom plate through a locking nut.

The camshaft bearing is sealed through a special oil seal, and the special oil seal adopts a one-way oil seal and an L-shaped support structure with a protection effect.

The friction disc diameter of the brake drum is optimised to 580 mm.

The vertical distance between the center of the brake and the support pin is c-235-245 mm, and the optimal distance is 241 mm; the vertical distance between the center of the brake and the cam shaft is 225-235 mm, and the optimal distance is 232 mm.

The distance between the left support pin and the right support pin of the brake is 70-88 mm, and the optimal distance is 76 mm.

The inner diameter and the outer diameter of the friction plate of the brake drum are designed in a non-concentric mode.

Has the advantages that: the invention relates to a drum brake of a large mining vehicle, in particular to a new design and developmentThe specification brake adopts an eccentric structure, the brake friction plate arrangement parameters fully consider the side structure and the arrangement type of the mining wheel, the cam shaft adopts a stepped shaft design, the cam shaft support adopts a brand new designed oil seal structure, and the newly designed drum brake for the mining truck realizes the characteristics of compact structure, high reliability and small quantity of brake parts on the basis of fully ensuring the brake performance, and can fully meet the use requirements of large mining trucks.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic cross-sectional view A-A of FIG. 2 according to the present invention;

FIG. 4 is a schematic view of the bracket and oil seal combination of the present invention;

FIG. 5 is a schematic structural view of a camshaft according to the present invention;

FIG. 6 is a schematic diagram of a non-concentric structure of a brake drum friction plate according to the present invention.

In the figure: 1. a brake drum; 2. braking the bottom plate; 3. a camshaft; 4. a roller; 5. a return spring; 6. a support pin; 7. a brake shoe assembly; 8. a limiting plate; 9. locking the nut; 10. a cotter pin; 11. a camshaft support; 12. oil sealing; 13. a grease nipple; 14. a steering knuckle.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in fig. 1-6, the invention provides a drum brake for a mining vehicle, which comprises a brake drum 1, a camshaft 3, a support pin 6, a brake shoe assembly 7, a limiting plate 8, a locking nut 9, a camshaft bracket 11, an oil seal 12 and a steering knuckle 14, wherein the brake base plate 2 is provided with a brake base plate support pin hole and is fixed on the steering knuckle 14 through a brake base plate fastening bolt, and the camshaft bracket 11 and the oil seal 12 form a combined part and are fixed on the side of the steering knuckle 14 through a bracket fastening bolt; the camshaft 3 is a stepped shaft, a clamp spring groove is formed in the shaft diameter to achieve axial positioning, and a camshaft support 11 for supporting the camshaft 3 is fixed on the side of a steering knuckle 14; the camshaft 3 passes through a combination part of the brake bottom plate 2, the camshaft bracket 11 and the oil seal 12; the brake shoe assembly 7 is kept in contact with the brake cam shaft 3 through the return spring 5, and the brake shoe assembly 7 is opened through rotation of the cam shaft 3 during braking until the brake shoe assembly 7 presses the brake drum 1 to realize braking, so that the vehicle is decelerated and stopped or is kept at the original position.

The utility model discloses a brake shoe assembly, including a stopper, a locking nut 9, 6 lockpins 6, 6 pin holes, the spacing of realization locking nut 9, 6 one end of a round pin is equipped with flange and spacing platform structure, the round pin hole of a round pin of brake shoe assembly 7 and the round pin hole of brake shoe 2 align, two round pins 6 pass brake shoe assembly 7, the flange of a round pin 6 and the spacing back of brake shoe contact, limiting plate 8 is packed into to one end in addition, fix a round pin 6 to brake shoe 2 through lock nut 9, split pin 10 passes a round pin 6 pin holes, it is fixed to realize lock nut 9's locking, brake shoe assembly 7 keeps on the stopper through return spring 5, gyro wheel 4 and brake camshaft 3, effectively improve the reliability of brake assembly.

The sealing of 3 bearings of camshaft realizes sealing through proprietary oil blanket, and this oil blanket adopts one-way oil blanket to add the L type supporting structure that has protect function, and inside one-way oil blanket can effectively prevent external impurity entering camshaft bearing on the one hand, adopted L type supporting structure simultaneously, can realize the effective assembly of oil blanket on the one hand, on the other hand realizes the abundant protection to the oil blanket in the use.

In order to ensure the spatial arrangement of the brake and fully utilize the braking effect of the brake in consideration of the limit of the wheel edge structure and the wheel specification of the mining vehicle, the diameter of the friction plate of the brake drum 1 is 580 mm.

The vertical distance between the center of the brake and the support pin 6 is 235-245 mm, and the optimal distance is 241 mm; the vertical distance between the center of the brake and the camshaft 3 is 225-235 mm, and the optimal distance is 232 mm.

The distance between the left support pin and the right support pin of the brake is 70-88 mm, and the optimal distance is 76 mm.

The inner diameter and the outer diameter of the friction plate of the brake drum 1 are designed in a non-concentric mode (as shown in figure 6), and the utilization rate of friction materials is improved.

The invention considers the structural characteristics of the drum brake, the arrangement type on the axle and the comprehensive requirements of the mining vehicle on the braking performance of the drum brake, carries out brand new design on the structure, has compact structure, large braking torque and reliable performance, meets the requirements of the large-scale mine car on the braking performance, and improves the running safety of the large-scale mine vehicle.

The above-described embodiments of the invention are intended to be illustrative only and are not intended to be limiting, as all changes that come within the scope of or equivalence to the invention are intended to be embraced therein.