Brake structure with cambered cam shaft

Abstract

The utility model belongs to the technical field of brakes, and particularly relates to a brake structure with a cambered surface cam shaft, which comprises a brake chassis, two brake components and a rotary pushing mechanism, the two brake components are symmetrically arranged, one side of each brake component is arranged on a brake shoe fixing seat, the brake shoe fixing seat is fixedly arranged on the brake chassis, and the rotary pushing mechanism is fixedly arranged on the brake chassis. The rotating and pushing mechanism is arranged between the other sides of the two brake assemblies and fixed to the brake chassis. The pushing wheels on the brake assemblies are matched with the cams on the rotary pushing mechanism, the rotary contact type pushing effect is achieved, the driving load generated when the two brake assemblies are pushed to be away from each other is effectively reduced, meanwhile, friction force and abrasion are reduced, and the service life of the brake is remarkably prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of brake technology, specifically relating to a brake structure with an arc-shaped camshaft. Background Technology

[0002] Existing brakes typically employ a design where a central cam directly contacts and pushes the connecting plate on the opposite side of the brake assembly to achieve braking by pushing two sets of brake components away from each other. This traditional structure has significant technical drawbacks in practical use: First, the direct frictional contact between the cam and the connecting plate greatly increases the driving torque required for cam rotation, leading to increased energy consumption during braking and additional load on the drive mechanism. Second, prolonged high friction accelerates wear on the cam's working surface, easily causing scratches and pits under frequent braking conditions, severely affecting the efficiency and stability of braking force transmission. Third, the accumulated heat from friction can cause thermal deformation of components, further exacerbating wear and potentially leading to a decline in braking performance. These problems collectively result in a significantly shortened lifespan and increased maintenance frequency of traditional brakes, while also making it difficult to guarantee the consistency of braking response speed and braking force, particularly in heavy-load or high-frequency braking applications. Furthermore, this friction-driven method generates abnormal noise, affecting the user experience. Therefore, this invention proposes a brake structure with an arc-shaped camshaft to address these issues. Utility Model Content

[0003] The purpose of this invention is to provide a brake structure with an arc-shaped camshaft, which can solve the above-mentioned technical problems.

[0004] The specific technical solution adopted by this utility model is as follows:

[0005] This utility model provides a brake structure with an arc-shaped camshaft, including a brake chassis, a brake assembly, and a rotary mechanism. The brake assembly is configured as two symmetrical components, and one side of each brake assembly is mounted on a brake shoe mounting seat. The brake shoe mounting seat is fixed on the brake chassis. The rotary mechanism is located between the other sides of the two brake assemblies and is fixed on the brake chassis.

[0006] The braking assembly includes a brake shoe and an inner shoe. Friction pads are mounted on the side of the brake shoe. Multiple ribs are fixed between the inner shoe and the brake shoe. Concave plates are fixed on both sides of the brake shoe and the inner shoe. A fixing pin is mounted on the brake shoe mounting seat. One of the concave plates is sleeved on the fixing pin and located between the brake shoe mounting seat and the brake chassis. A pusher wheel is provided in the other concave plate. The pusher wheel is sleeved on the central shaft, and the central shaft is mounted on the other concave plate by an interference fit.

[0007] The rotary mechanism includes a pad, a brake drive shaft, and a cam. The pad is mounted on the brake chassis and located on the lower side between two push wheels. The cam is positioned between the two push wheels and rests on the pad. The brake drive shaft passes through the pad and the brake chassis, and a plug-in block is fixed on its top surface. The plug-in block is engaged with a plug-in slot, which is located on the bottom surface of the cam. A circular hole is provided on the cam, and the circular hole communicates with the plug-in slot. A fastening screw is provided above the pad, and the fastening screw passes through the circular hole and engages with a threaded hole on the plug-in block.

[0008] Preferably, when the two push wheels are far apart from each other, they are respectively attached to the outer sides of the two reverse thrust arc surfaces, and the two reverse thrust arc surfaces are respectively set diagonally on the side of the cam.

[0009] Preferably, when the two push wheels approach each other, they abut against the corners of the two snap-fit ​​arc surfaces, and the two snap-fit ​​arc surfaces are respectively located at the opposite corners of the side of the cam, with the snap-fit ​​arc surfaces and the reverse push arc surfaces located on the same side and corresponding to each other.

[0010] Preferably, when the two push wheels approach each other, the outer wall of the central shaft driven by them abuts against the inner side of the outer baffle. The outer baffle is provided in two parts and is integrally set on both sides of the straight line of the pad.

[0011] Preferably, a hook is fixed on the side of the two inner hoof plates opposite each other, near the push wheel.

[0012] The beneficial effects are:

[0013] 1. This utility model achieves a rotary contact pushing effect by cooperating the pushing wheel on the braking assembly with the cam on the rotary pushing mechanism, which effectively reduces the driving load when pushing the two sets of braking assemblies away from each other, while reducing friction and wear, and significantly improving the service life of the brake.

[0014] 2. This utility model sets a reverse thrust arc surface and a snap-fit ​​arc surface on the cam to form a cooperating structure with the push wheel, so as to realize the bidirectional push of the two push wheels when the cam rotates: the reverse thrust arc surface makes the two push wheels move away from each other to achieve braking, while the snap-fit ​​arc surface accurately positions the two push wheels when resetting, ensuring that the reverse thrust arc surface and the push wheel maintain the correct correspondence after reverse rotation, and providing reliable preparation for the next braking action. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the braking component structure of this utility model;

[0017] Figure 3This is a side-view diagram of the explosion distribution structure of the thrust mechanism of this utility model;

[0018] Figure 4 This is a side-top view of the explosion distribution structure of the thrust mechanism of this utility model.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Brake chassis; 2. Brake assembly; 21. Brake shoe; 22. Friction pad; 23. Inner shoe; 23a. Rib; 24. Hook; 25. Concave plate; 26. Central shaft; 27. Push wheel; 28. Fixing pin; 3. Brake shoe mounting seat; 4. Rotation mechanism; 41. Washer; 41a. Outer lug; 42. Brake drive shaft; 42a. Insertion block; 43. Cam; 43a. Reverse thrust arc surface; 43b. Snap-in arc surface; 43c. Insertion groove; 44. Fastening screw. Detailed Implementation

[0021] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0022] like Figure 1-4 As shown, a brake structure with an arc-shaped camshaft includes a brake chassis 1, a brake assembly 2, and a rotary mechanism 4. The brake assembly 2 is configured as two symmetrical components, and one side of each brake assembly 2 is mounted on a brake shoe mounting seat 3. The brake shoe mounting seat 3 is fixed on the brake chassis 1. The rotary mechanism 4 is located between the other sides of the two brake assemblies 2 and is fixed on the brake chassis 1.

[0023] The braking assembly 2 includes a brake shoe 21 and an inner shoe 23. Friction pads 22 are mounted on the side of the brake shoe 21. Multiple ribs 23a are fixed between the inner shoe 23 and the brake shoe 21. Concave plates 25 are fixed on both sides of the brake shoe 21 and the inner shoe 23. A fixing pin 28 is mounted on the brake shoe fixing seat 3. One concave plate 25 is sleeved on the fixing pin 28 and located between the brake shoe fixing seat 3 and the brake chassis 1. A pusher wheel 27 is provided in the other concave plate 25. The pusher wheel 27 is sleeved on the central shaft 26, and the central shaft 26 is mounted on the other concave plate 25 by interference fit.

[0024] The rotary mechanism 4 includes a pad 41, a brake drive shaft 42, and a cam 43. The pad 41 is mounted on the brake chassis 1 and located on the lower side between the two push wheels 27. The cam 43 is mounted between the two push wheels 27 and rests on the pad 41. The brake drive shaft 42 passes through the pad 41 and the brake chassis 1, and a plug block 42a is fixed on its top surface. The plug block 42a is plugged into the plug groove 43c, which is located on the bottom surface of the cam 43. A round hole is provided on the cam 43, and the round hole communicates with the plug groove 43c. A fastening screw 44 is provided above the pad 41, and the fastening screw 44 passes through the round hole and is threaded into the threaded hole on the plug block 42a.

[0025] As an optional implementation, when the two pusher wheels 27 move away from each other, they respectively conform to the outer sides of the two reverse thrust arc surfaces 43a, and the two reverse thrust arc surfaces 43a are respectively set diagonally on the side of the cam 43. In this way, the reverse thrust arc surfaces 43a are rotated by the cam 43, which pushes the two pusher wheels 27 away from each other, thereby causing the friction plates 22 on the two sets of braking components 2 to move away from each other, achieving the braking effect after expansion.

[0026] See attached document Figure 2 and attached Figure 4 When the two push wheels 27 approach each other, they respectively abut against the corners of the two locking arc surfaces 43b. The two locking arc surfaces 43b are respectively located on the other opposite corner of the side of the cam 43. The locking arc surface 43b and the reverse thrust arc surface 43a are located on the same side and correspond to each other. In this way, after the two sets of braking components 2 approach each other, the reset push wheels 27 contact the corners of the locking arc surfaces 43b, thereby responding to the reverse thrust adjustment again.

[0027] Furthermore, when the two push wheels 27 approach each other, the outer wall of the central shaft 26 driven by them abuts against the inner side of the outer stop ear 41a. There are two outer stop ears 41a, which are integrally set on both sides of the straight line of the pad 41. In this way, when the two sets of braking components 2 are pulled back by the tension spring, the two push wheels 27 will approach each other, and the central shaft 26 will abut against the inner side of the outer stop ear 41a, thereby forming a positioning effect for the two sets of braking components 2 after reset.

[0028] Furthermore, a hook 24 is fixed on the opposite side of the two inner hoof plates 23 near the push wheel 27 for attaching the reset spring.

[0029] With the above structure, when the brake drive shaft 42 drives the cam 43 to rotate, the reverse thrust arc surface 43a of the cam 43 contacts the two pusher wheels 27 and applies radial thrust, forcing the two pusher wheels 27 to move in opposite directions. At this time, the pusher wheels 27 drive the inner concave plate 25 and brake shoe 21 assembly to expand outward through the central shaft 26, so that the friction plate 22 presses against the brake surface to achieve braking. During this process, the arc surface profile design of the cam 43 makes the thrust evenly distributed, significantly reducing the friction loss of the contact surface. After braking is completed, the return spring pulls the inner shoe 23 through the hook 24 to return the brake assembly 2 to its original position. At this time, the pusher wheel 27 slides along the reverse thrust arc surface 43a until the central shaft 26 contacts the inner side of the outer stop ear 41a, ensuring that the pusher wheel 27 accurately stops at the corner positioning point of the latching arc surface 43b. This positioning structure allows the reverse thrust arc surface 43a to immediately form effective contact with the pusher wheel 27 when the cam 43 rotates in the opposite direction, establishing an accurate initial engagement position for the next braking action. Throughout the entire movement, the rolling contact between the cam 43 and the pusher wheel 27 reduces the frictional resistance above the wing plate compared to the traditional sliding friction structure, effectively improving the service life of the structure.

[0030] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part all adopt conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. This application is mainly used to protect mechanical devices. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, are implemented according to conventional methods in the field.

Claims

1. A brake structure with an arc-shaped camshaft, characterized in that: The system includes a brake chassis (1), brake components (2) and a rotary mechanism (4). The brake components (2) are configured as two symmetrical components, and one side of each brake component (2) is mounted on a brake shoe mounting base (3). The brake shoe mounting base (3) is fixed on the brake chassis (1). The rotary mechanism (4) is located between the other sides of the two brake components (2) and is fixed on the brake chassis (1). The braking assembly (2) includes a brake shoe (21) and an inner shoe (23). Friction pads (22) are installed on the side of the brake shoe (21). Multiple ribs (23a) are fixed between the inner shoe (23) and the brake shoe (21). Concave plates (25) are fixed on both sides of the brake shoe (21) and the inner shoe (23). A fixing pin (28) is installed on the brake shoe fixing seat (3). One of the concave plates (25) is sleeved on the fixing pin (28) and located between the brake shoe fixing seat (3) and the brake chassis (1). A pusher wheel (27) is provided in the other concave plate (25). The pusher wheel (27) is sleeved on the central shaft (26), and the central shaft (26) is installed on the other concave plate (25) by interference fit. The rotary push mechanism (4) includes a pad (41), a brake drive shaft (42), and a cam (43). The pad (41) is set on the brake chassis (1) and located on the lower side between two push wheels (27). The cam (43) is set between the two push wheels (27) and rests on the pad (41). The brake drive shaft (42) passes through the pad (41) and the brake chassis (1), and a plug block (42a) is fixed on its top surface. The plug block (42a) is plugged into the plug groove (43c), and the plug groove (43c) is opened on the bottom surface of the cam (43). A round hole is opened on the cam (43), and the round hole communicates with the plug groove (43c). A fastening screw (44) is set above the pad (41), and the fastening screw (44) passes through the round hole and is threaded into the threaded hole opened on the plug block (42a).

2. The brake structure with an arc-shaped cam (43) shaft according to claim 1, characterized in that: When the two push wheels (27) move away from each other, they respectively fit and correspond to the outer sides of the two reverse push arc surfaces (43a), and the two reverse push arc surfaces (43a) are respectively set on the side diagonally opposite the cam (43).

3. The brake structure with an arc-shaped cam (43) shaft according to claim 2, characterized in that: When the two push wheels (27) approach each other, they abut against the corners of the two snap-fit ​​arc surfaces (43b), and the two snap-fit ​​arc surfaces (43b) are respectively located at the other opposite corners of the side of the cam (43). The snap-fit ​​arc surface (43b) and the reverse push arc surface (43a) are located on the same side and correspond to each other.

4. The brake structure with an arc-shaped cam (43) shaft according to claim 3, characterized in that: When the two push wheels (27) approach each other, the outer wall of the central shaft (26) driven by them abuts against the inner side of the outer baffle (41a). The outer baffle (41a) is set in two pieces and is integrally set on both sides of the straight line of the pad (41).

5. The brake structure with an arc-shaped cam (43) shaft according to claim 4, characterized in that: The two inner hoof plates (23) are fixed with hooks (24) on the opposite side near the push wheel (27).

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