A double brake cylinder brake shoe

Abstract

The present invention relates to the technical field of braking devices, and particularly relates to a double-brake cylinder brake shoe. The present invention realizes the function of automatically adjusting the distance between the friction lining and the brake drum by providing a fixed adjusting screw and a movable adjusting sleeve between two brake shoe linings, and utilizing the spiral teeth on the movable adjusting sleeve, the small worm gear and the rack on the brake drum; the present invention realizes the function of manually detachable connection between the two by connecting the brake shoe lining and the friction plate bracket through a mounting groove and a mounting protrusion; the present invention is connected to the friction plate bracket through a mounting plate on the friction lining, the mounting plate is provided with a strip-shaped card slot, and a limiting sleeve is provided between the limiting rod and the mounting plate. This structural design ensures that the friction lining realizes the firmness of manual disassembly and installation through the mutual cooperation between the friction plate bracket and the brake shoe, thus facilitating the manual disassembly and installation between the brake shoe and the friction lining.

Description

Technical Field

[0001] The present invention relates to the technical field of braking devices, and particularly to a double-brake-cylinder brake shoe. Background Art

[0002] A brake shoe is a component that is pushed outwards by the action of a brake cam or a push rod to press against the brake drum for braking. It is installed on the brake drum and is one of the key safety parts in an automotive braking system. The brake shoe is shaped like a half-moon. When the brake is applied, the two half-moon-shaped brake shoes expand outwards under the action of the brake wheel cylinder, propping up the brake shoe to rub against the inner wall of the brake drum to achieve the function of decelerating or stopping the vehicle.

[0003] During the braking process of the brake shoe, the externally fixed friction lining is used to rub against the brake drum to achieve the purpose of braking. Over time, the thickness of the friction lining will decrease. At this time, it is necessary to manually adjust the position of the brake shoe. At the same time, when replacing the brake shoe and the friction lining, professional tools are required for disassembly, which is time-consuming and laborious in case of an emergency and inconvenient to use. In view of the above situation, a double-brake-cylinder brake shoe is designed to solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is, in view of the above-mentioned technical deficiencies, to provide a double-brake-cylinder brake shoe. The present invention realizes the function of automatically adjusting the distance between the friction lining and the brake drum by providing a fixed adjusting screw and a movable adjusting nut between two brake shoes, and using the spiral teeth on the movable adjusting nut, the small worm gear and the rack on the brake drum. The present invention realizes the function of manually detachable connection between the two by connecting the brake shoe and the friction plate bracket through an installation groove and an installation protrusion. The present invention is connected to the friction plate bracket through a mounting plate on the friction lining. The mounting plate is provided with a strip-shaped card slot, and a limiting sleeve is provided between the limiting rod and the mounting plate. This structural design ensures the firmness of the manual disassembly and installation of the friction lining through the mutual cooperation between the friction plate bracket and the brake shoe, thus facilitating the manual disassembly and installation between the brake shoe and the friction lining.

[0005] To solve the above technical problems, the present invention provides a double-brake-cylinder brake shoe, aiming to provide a double-brake-cylinder brake shoe with an automatic adjustment function and convenient for manual disassembly.

[0006] The technical solution provided by the present invention is: a double-brake-cylinder brake shoe, including a brake drum, characterized in that both sides inside the brake drum are provided with brake shoe linings. A first brake cylinder and a second brake cylinder are respectively provided at the connection of the brake shoe linings. A fixed adjustment screw is provided on one brake shoe lining, and a movable adjustment nut is rotatably connected to the other brake shoe lining. A spiral tooth is provided on the outside of the movable adjustment nut. A rack is connected to the spiral tooth through the brake shoe lining below the spiral tooth. A small worm gear is provided between the spiral tooth and the rack.

[0007] To further optimize this technical solution, installation grooves are provided on the brake shoe linings. The brake shoe linings are connected to a friction plate support through the installation grooves. Installation protrusions are provided on the brake shoe linings. A plurality of L-shaped limiting rods are provided inside the installation protrusions. A spring is sleeved on the horizontal part of the limiting rods.

[0008] To further optimize this technical solution, a friction lining is connected to the friction plate support through a mounting plate. Strip-shaped card slots for cooperating with the limiting rods are provided on the mounting plate. A limiting sleeve is provided between the limiting rods and the mounting plate.

[0009] To further optimize this technical solution, the small worm gear is rotatably connected to the brake drum. The small worm gear is respectively meshed with the spiral tooth and the rack.

[0010] To further optimize this technical solution, a tension spring is provided at the second brake cylinder.

[0011] To further optimize this technical solution, one end of the spring is fixedly connected to the limiting rod, and the other end is connected to the inner wall of the installation protrusion.

[0012] The beneficial effects of the present invention are as follows: By providing a fixed adjustment screw and a movable adjustment nut between the two brake shoe linings, and using the spiral tooth on the movable adjustment nut, the small worm gear on the brake drum and the rack, the function of automatically adjusting the distance between the friction lining and the brake drum is realized. By connecting the brake shoe lining and the friction plate support through the installation groove and the installation protrusion, the function of manually detachable connection between the two is realized. By connecting the friction lining to the friction plate support through the mounting plate, strip-shaped card slots are provided on the mounting plate, and a limiting sleeve is provided between the limiting rod and the mounting plate. This structural design ensures the firmness of manual disassembly and installation of the friction lining through the cooperation of the friction plate support and the brake shoe, thus facilitating the manual disassembly and installation between the brake shoe and the friction lining. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is an overall structural schematic diagram of an embodiment of a double-brake-cylinder brake shoe;

[0014] Figure 2 is a schematic plan view of the internal structure of a brake drum of an embodiment of a double brake cylinder brake shoe;

[0015] Figure 3 is an exploded view of a friction lining of an embodiment of a double brake cylinder brake shoe;

[0016] Figure 4 is an exploded view of a friction lining and a friction plate bracket of an embodiment of a double brake cylinder brake shoe.

[0017] In the drawings: 1, brake drum; 2, brake shoe; 3, first brake cylinder; 4, second brake cylinder; 5, fixed adjustment screw; 6, movable adjustment sleeve; 7, helical teeth; 8, rack; 9, small worm gear; 10, installation groove; 11, friction plate bracket; 12, installation protrusion; 13, limit rod; 14, spring; 15, friction lining; 16, strip-shaped card slot; 17, limit sleeve; 18, tension spring; 19, mounting plate. Detailed implementation manners

[0018] To make the purpose, technical solutions and advantages of the present invention clearer and more obvious, the present invention will be further described in detail below in conjunction with the detailed implementation manners and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the descriptions of known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0019] Detailed implementation manners: In combination with Figures 1-4 As shown, a double brake cylinder brake shoe includes a brake drum 1. It is characterized in that brake shoes 2 are provided on both sides inside the brake drum 1. A first brake cylinder 3 and a second brake cylinder 4 are respectively provided at the connection parts of the brake shoes 2. A fixed adjustment screw 5 is provided on one of the brake shoes 2, and a movable adjustment sleeve 6 is rotatably connected to the other brake shoe 2. Helical teeth 7 are provided on the outside of the movable adjustment sleeve 6. A rack 8 is connected to the helical teeth 7 through the brake shoe 2 below. A small worm gear 9 is provided between the helical teeth 7 and the rack 8.

[0020] To further optimize the technical solution, an installation groove 10 is formed in the brake shoe 2. The brake shoe 2 is connected to a friction plate bracket 11 through the installation groove 10. An installation protrusion 12 is provided on the brake shoe 2. A plurality of L-shaped limit rods 13 are provided inside the installation protrusion 12. A spring 14 is sleeved on the horizontal part of the limit rod 13.

[0021] To further optimize this technical solution, a friction lining 15 is connected to the friction plate bracket 11 through a mounting plate 19. A strip-shaped card slot 16 for cooperating with the limit rod 13 is provided on the mounting plate 19, and a limit sleeve 17 is provided between the limit rod 13 and the mounting plate 19.

[0022] To further optimize this technical solution, the small worm gear 9 is rotationally connected to the brake drum 1, and the small worm gear 9 is respectively meshed with the helical teeth 7 and the rack 8.

[0023] To further optimize this technical solution, a tension spring 18 is provided at the second brake wheel cylinder 4.

[0024] To further optimize this technical solution, one end of the spring 14 is fixedly connected to the limit rod 13, and the other end is connected to the inner wall of the mounting protrusion 12.

[0025] The beneficial effects of the present invention are as follows: By providing a fixed adjustment screw 5 and a movable adjustment nut 6 between the two brake shoes 2, and using the helical teeth 7 on the movable adjustment nut 6, the small worm gear 9 on the brake drum 1, and the rack 8, the present invention realizes the function of automatically adjusting the distance between the friction lining 15 and the brake drum 1; By connecting the brake shoe 2 and the friction plate bracket 11 through the mounting groove 10 and the mounting protrusion 12, the present invention realizes the function of manually detachable connection between the two; By connecting the friction lining 11 to the friction plate bracket 11 through the mounting plate 19, providing a strip-shaped card slot 16 on the mounting plate 19, and providing a limit sleeve 17 between the limit rod 13 and the mounting plate 19, this structural design ensures the firmness of manual disassembly and installation of the friction lining 15 through the mutual cooperation of the friction plate bracket 11 and the brake shoe 2, thus facilitating the manual disassembly and installation between the brake shoe 2 and the friction lining 15.

[0026] To facilitate the understanding of a double-brake-wheel-cylinder brake shoe provided by the embodiments of the present invention, the following describes it in detail with specific embodiments.

[0027] During specific implementation: The present invention provides a double-brake-wheel-cylinder brake shoe, as Figures 1 to 4 shown, Figure 1 which is a schematic diagram of the overall structure of a double-brake-wheel-cylinder brake shoe, including a brake drum 1, and a first brake wheel cylinder 3 and a second brake wheel cylinder 4 for driving the brake shoe 2 to brake on the brake drum 1.

[0028] Specifically, as Figure 2 shown, Figure 2Represents a schematic plan view of the internal structure of a brake drum with a double brake cylinder brake shoe. On both sides of the first brake cylinder 3 and the second brake cylinder 4 are two brake shoe linings 2. Below the first brake cylinder 3 is a fixed adjusting screw 5 and a movable adjusting sleeve 6 threadedly connected thereto. The fixed adjusting screw 5 is fixedly connected to one of the brake shoe linings 2, and the movable adjusting sleeve 6 is rotatably connected to the other brake shoe lining 2. A helical tooth 7 is provided outside the movable adjusting sleeve 6. A rack 8 is integrally connected to the brake shoe lining 2. There is a small worm gear 9 between the helical tooth 7 and the rack 8. The small worm gear 9 is rotatably connected to the brake drum 1, that is, the small worm gear 9 rotates at a fixed point on the brake drum 1. An extension spring 18 is provided on the upper part of the second brake cylinder 4.

[0029] Specifically, as Figure 3 and Figure 4 shown, an installation groove 10 is provided on the brake shoe lining 2. The brake shoe lining 2 is connected with a friction plate bracket 11 through the installation groove 10. Corresponding installation protrusions 12 are provided on the friction plate bracket 11. The installation protrusions 12 and the installation groove 10 are used in cooperation. A limiting rod 13 is provided inside the installation protrusion 12. The limiting rod 13 is inserted inside the installation protrusion 12. A spring 14 is sleeved on the limiting rod 13. Both ends of the spring 14 are fixedly connected to the limiting rod 13 and the installation protrusion 12 respectively. A friction lining 15 is installed on the friction plate bracket 11. An installation plate 19 is integrally connected to the friction lining 15. Strip-shaped card slots 16 with the same number as the limiting rods 13 are provided on the installation plate 19. The shapes and sizes of the strip-shaped card slots 16 and the limiting rods 13 are the same. The limiting rod 13 passes through the strip-shaped card slots 16. A limiting sleeve 17 is also provided between the limiting rod 13 and the strip-shaped card slots 16. There is a bulging part at the top of the limiting rod 13. The bulging part clamps the limiting sleeve 17 between the limiting rod 13 and the strip-shaped card slots 16.

[0030] Further, when implemented specifically, when the vehicle owner steps on the brake pedal, the brake pedal squeezes the hydraulic oil into the first brake cylinder 3 and the second brake cylinder 4, and then drives the brake shoe 2 to move towards the inner wall of the brake drum 1, so that the friction lining 15 presses against the brake drum 1, thereby generating the effect of vehicle braking. When the brake shoe 2 moves to both sides, the movable adjusting sleeve 6 also moves to both sides. Immediately, the spiral teeth 6 drive the small worm wheel 9 to rotate, and the movable adjusting sleeve 6 also rotates accordingly, so that the distance between the fixed adjusting screw 5 and the movable adjusting sleeve 6 becomes longer. When the friction lining 15 is worn and thinned after long-term friction, the fixed adjusting screw 5 will automatically adjust its length inside the movable adjusting sleeve 6, so that the friction lining 15 and the inner wall of the brake drum 1 always maintain a certain distance; after the friction lining 15 is used for a period of time, it needs to be replaced. At this time, manually move the limit rod 13 towards the middle, then take out the limit sleeve 17 sleeved on it, and then take out the friction lining 15 outward. If you want to replace the friction plate bracket 11, continue to move the limit rod 13 towards the middle, and then take out the installation protrusion 12 on the friction plate bracket 11 from the installation groove 10.

[0031] The control method of the present invention is automatically controlled by a controller. The control circuit of the controller can be realized by simple programming by those skilled in the art, which belongs to the common general knowledge in the art. And the present invention is mainly used to protect mechanical settings, so the control method and circuit connection of the present invention will not be explained in detail.

[0032] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims or equivalent forms of such scope and boundaries.

Claims

1. A double brake cylinder brake shoe, comprising a brake drum (1), characterized in that, On both inner sides of the brake drum (1), brake shoes (2) are provided. At the joints of the brake shoes (2), a first brake cylinder (3) and a second brake cylinder (4) are respectively provided. A fixed adjusting screw (5) is provided on one of the brake shoes (2), and a movable adjusting screw sleeve (6) is rotatably connected to the other brake shoe (2). External helical teeth (7) are provided on the movable adjusting screw sleeve (6). Below the helical teeth (7), a rack (8) is connected through the brake shoe (2). A small worm gear (9) is provided between the helical teeth (7) and the rack (8). An installation groove (10) is formed in the brake shoe (2). The brake shoe (2) is connected with a friction plate bracket (11) through the installation groove (10). Installation protrusions (12) are provided on the brake shoe (2). A plurality of L-shaped limiting rods (13) are provided inside the installation protrusions (12). A spring (14) is sleeved on the horizontal part of the limiting rod (13). A friction lining (15) is connected to the friction plate bracket (11) through a mounting plate (19). Strip-shaped card slots (16) for cooperating with the limiting rods (13) are provided on the mounting plate (19). A limiting sleeve (17) is provided between the limiting rod (13) and the mounting plate (19).

2. The double brake cylinder brake shoe according to claim 1, wherein: The small worm gear (9) is rotatably connected to the brake drum (1), and the small worm gear (9) is respectively meshed with the helical teeth (7) and the rack (8).

3. The double-brake-cylinder brake shoe according to claim 1, wherein: A tension spring (18) is provided at the second brake cylinder (4).

4. The double brake cylinder brake shoe according to claim 1, characterized in that: One end of the spring (14) is fixedly connected to the limiting rod (13), and the other end is connected to the inner wall of the installation protrusion (12).

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