Cam disc type air brake with side linkage point stop

Abstract

The application discloses a cam disc type air-cooled brake with side linkage point braking, which comprises an air-cooled brake disc installed on an axle, a side shoe linkage mechanism arranged on the periphery of the air-cooled brake disc, a through air-cooled channel arranged on the air-cooled brake disc, and a cam curved surface arranged on the outer periphery of the air-cooled brake disc. The side shoe linkage mechanism comprises a linkage seat body drivingly connected with a pushing mechanism, the linkage seat body is drivingly connected with a clamp capable of being opened and closed to clamp the air-cooled brake disc and a straight shoe capable of being extended and retracted relative to the cam curved surface of the air-cooled brake disc, and the clamp is provided with a side clamp shoe. The pushing mechanism drives the linkage seat body to drive the clamp and the straight shoe to realize point braking on the air-cooled brake disc. The application discloses a cam disc type air-cooled brake with side linkage point braking. The brake process is actively air-cooled and heat-dissipated, the brake heat effect is reduced, the operation and energy consumption economy are improved, and the brake friction and brake stability are improved.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle braking technology, specifically to a cam-disc air-cooled brake with side-linked intermittent braking. Background Technology

[0002] Currently, vehicles commonly use traditional solid disc brake discs and ordinary ventilated disc brake discs. Traditional solid disc brakes: The entire disc is a solid disc structure. During braking, friction heat is concentrated and the heat dissipation is slow, which can easily lead to heat fade and reduced braking performance. In addition, the disc is heavy, which increases the load on the vehicle's axle.

[0003] Ordinary ventilated disc brake discs: They have simple ventilation channels inside and rely on passive air intake for heat dissipation when the vehicle is moving. The heat dissipation efficiency is low, and they are still prone to high temperature failure during long-distance continuous braking. The friction surface is flat, which limits the increase of friction and results in insufficient braking stability.

[0004] Existing brake discs do not combine an active air-cooling structure with a cam-type friction enhancement design, making it impossible to simultaneously achieve lightweight, efficient heat dissipation, and high friction, thus making them unsuitable for long-distance continuous braking scenarios. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and provides a cam-disc air-cooled brake with side-linked intermittent braking; it realizes active air cooling heat dissipation during the braking process, reduces the braking heat effect; improves handling and energy economy; improves braking friction and braking stability, and is suitable for long-distance continuous braking conditions.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a cam-disc air-cooled brake with side-linked intermittent braking, comprising: an air-cooled brake disc mounted on an axle, and a side brake shoe linkage mechanism disposed around the air-cooled brake disc; the air-cooled brake disc is provided with several through-flow air-cooling channels, and the outer periphery of the air-cooled brake disc is provided with a cam surface; the side brake shoe linkage mechanism includes a linkage seat body driven and connected to a push mechanism, a clamp that can open and close relative to the air-cooled brake disc is driven and connected to the linkage seat body, and a straight-push brake shoe that can extend and retract relative to the cam surface of the air-cooled brake disc; the clamp is provided with a side-clamp brake shoe, which can move relative to the side of the air-cooled brake disc under the action of the clamp; the push mechanism drives the linkage seat body to drive the clamp and the straight-push brake shoe to achieve intermittent opening and closing intermittent braking of the air-cooled brake disc.

[0007] In a preferred embodiment of the present invention, the air-cooled brake disc includes a central disc, and an air-cooling channel is provided on the side of the central disc; the air-cooling channel includes an air vent one and an air vent two respectively provided on both sides of the central disc, and an internal flow channel connecting the air vent one and the air vent two, and the internal flow channel forms a plurality of heat dissipation channels on the central disc.

[0008] In a preferred embodiment of the present invention, air vent one and air vent two are respectively arranged on the radial trajectory of the central wheel, and air vent one and air vent two are staggered on the central wheel, so that the heat dissipation channel forms a guiding slope or guiding curve within the central wheel.

[0009] In a preferred embodiment of the present invention, the air-cooled brake disc includes a mating side disc, and the side disc has a plurality of through holes forming heat dissipation channels, which serve as air-cooling channels.

[0010] In a preferred embodiment of the present invention, the central wheel is detachably mounted between the side wheels, and the two sides of the central wheel are respectively provided with bonding protrusions that engage with the side wheels on both sides.

[0011] In a preferred embodiment of the present invention, the air-cooled brake disc is provided with a shaft hole for the axle to pass through in the middle, and the cam surface of the air-cooled brake disc forms a closed-loop concave-convex surface structure on the outer periphery of the air-cooled brake disc, and the closed-loop concave-convex surface structure is a symmetrical structure.

[0012] In a preferred embodiment of the present invention, the clamp includes a pair of curved rods that can open and close relative to each other. One end of each curved rod is provided with a side clamping shoe, and the other end of each curved rod is pivotally connected to an adjacent curved rod. The rod body of each curved rod is rotatably connected to one end of a traction support rod, and the other end of the traction support rod is pivotally connected to a linkage seat.

[0013] In a preferred embodiment of the present invention, the linkage seat includes a push-pull rod body, one end of which is driven and connected to the push mechanism, and the other end of which is connected to the direct-push brake shoe. The push-pull rod body or the direct-push brake shoe is provided with an outwardly extending pivot shaft, which is pivotally connected to one end of the traction support rod through the pivot shaft. The pushing mechanism is equipped with an outwardly extending pivot shaft 2, which is pivotally connected to the end of the crank rod.

[0014] In a preferred embodiment of the present invention, clamps are pivotally connected to both sides of the pushing mechanism, and the clamps drive the side brake shoes to open and close relative to the two sides of the air-cooled brake disc to achieve intermittent opening and closing braking.

[0015] In a preferred embodiment of the present invention, the side of the direct-acting brake shoe closest to the air-cooled brake disc has a curved structure, and the curved structure is provided with an outwardly convex arc surface that matches the cam curved surface shape of the air-cooled brake disc. When the straight brake shoe is pressed down and abuts against the concave part of the cam surface, the linkage seat drives the clamp to clamp the side brake shoe relative to both sides of the air-cooled brake disc for intermittent braking. When the straight brake shoe retracts and resets along the convex side of the cam surface, the linkage seat drives the clamp to separate and release the side brake shoe relative to both sides of the air-cooled brake disc.

[0016] This invention addresses the deficiencies in the technical background, and the beneficial technical effects of this invention are: A cam-disc air-cooled brake with side-linked intermittent braking is disclosed. This invention solves the problems of poor heat dissipation and easy heat fade in traditional brake discs by achieving active air cooling during braking, thus reducing the braking thermal effect. This invention reduces the weight of the brake disc itself, lowers the vehicle's under-axle weight, and improves handling and energy economy. This invention enhances braking friction and braking stability, making it suitable for long-distance continuous braking conditions. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a front view schematic diagram of the cam disc air-cooled brake with side-linked intermittent braking according to a preferred embodiment of the present invention; Figure 2 This is a side view of the preferred embodiment of the cam disc air-cooled brake with side-linked intermittent braking. Figure 3 This is a bottom view schematic diagram of a cam disc air-cooled brake with side-linked intermittent braking according to a preferred embodiment of the present invention; Figure 4 This is a top view of a preferred embodiment of the cam disc air-cooled brake with side-linked intermittent braking. Figure 5 This is a schematic diagram of the axial structure of a cam-disc air-cooled brake with side-linked intermittent braking according to a preferred embodiment of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the axial structure of a cam-disc air-cooled brake with side-linked intermittent braking according to a preferred embodiment of the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the axial structure of a cam-disc air-cooled brake with side-linked intermittent braking according to a preferred embodiment of the present invention. Figure 3 ; Figure 8 This is a schematic diagram of the axial structure of a cam-disc air-cooled brake with side-linked intermittent braking according to a preferred embodiment of the present invention. Figure 4 ; Figure 9 This is a schematic diagram of the axial structure of a cam-disc air-cooled brake with side-linked intermittent braking according to a preferred embodiment of the present invention. Figure 5 ; Figure 10 This is a front view of the central disc of the cam-disc air-cooled brake with side-linked intermittent braking according to a preferred embodiment of the present invention. Figure 11 This is a schematic diagram of the axial structure of the central disc of the cam-disc air-cooled brake with side-linked intermittent braking according to a preferred embodiment of the present invention. Figure 1 ; Figure 12 This is a schematic diagram of the axial structure of the central disc of the cam-disc air-cooled brake with side-linked intermittent braking according to a preferred embodiment of the present invention. Figure 2 ; Figure 13 This is a schematic diagram of the axial structure of the central disc of the cam-disc air-cooled brake with side-linked intermittent braking according to a preferred embodiment of the present invention. Figure 3 ; Figure 14 This is a schematic diagram of the axial structure of the central disc of the cam-disc air-cooled brake with side-linked intermittent braking according to a preferred embodiment of the present invention. Figure 4 ; Among them, 1. Air-cooled brake disc; 11. Cam surface; 12. Center wheel; 121. Air outlet one; 122. Internal flow channel; 123. Air outlet two; 124. Keying protrusion; 1241. Inner convex key; 1242. Diverging key strip; 1243. Outer convex key; 13. Side wheel; 131. Through hole; 14. Shaft hole; 2. Side brake shoe linkage mechanism; 21. Push mechanism; 22. Linkage seat; 221. Push-pull rod; 222. Pivot shaft one; 223. Straight-push brake shoe; 23. Clamp; 231. Curved rod; 232. Pivot shaft two; 233. Pulling support rod; 234. Side clamp brake shoe; 3. Axle. Detailed Implementation

[0019] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations thereof. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0020] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in the embodiments of the present invention, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0021] Example 1, as Figures 1-14 As shown, a cam-disc type air-cooled brake with side-linked intermittent braking includes: an air-cooled brake disc 1 mounted on the axle 3, and a side brake shoe linkage mechanism 2 disposed around the air-cooled brake disc 1.

[0022] The air-cooled brake disc 1 is provided with multiple laterally spaced and interconnected air-cooling channels. In this embodiment, the air-cooled brake disc 1 is provided with multiple laterally spaced and interconnected air-cooling channels, and spaced-apart heat dissipation fins are formed on the air-cooled brake disc 1 to form fan blades. A cam surface 11 is provided on the outer periphery of the air-cooled brake disc 1. The cam surface 11 forms a closed-loop concave-convex surface structure on the outer periphery of the air-cooled brake disc 1. Further, the closed-loop concave-convex surface structure is preferably a symmetrical structure. The symmetrical structure includes a rotationally symmetrical structure or a centrally symmetrical structure. In this embodiment, a rotationally symmetrical structure is used. For example, the closed-loop concave-convex surface structure is a hexagonal flexible-edged octagon (i.e., a curved-edged octagon).

[0023] The side brake shoe linkage mechanism 2 includes a linkage seat 22 driven by a push mechanism 21 (i.e., a telescopic mechanism). The linkage seat 22 is driven by a clamp 23 capable of opening and closing relative to the air-cooled brake disc 1, and a straight-push brake shoe 223 capable of extending and retracting relative to the cam surface 11 of the air-cooled brake disc 1. The clamp 23 is equipped with a side-clamping brake shoe 234, which, driven by the clamp 23, can move relative to the side of the air-cooled brake disc 1. The push mechanism 21 drives the linkage seat 22 to drive the clamp 23 and the straight-push brake shoe 223 to achieve intermittent opening and closing of the air-cooled brake disc 1.

[0024] Specifically, the clamp 23 includes a pair of cranks 231 that can open and close relative to each other. One end of the crank 231 is provided with a side clamping shoe 234, and the other end of the crank 231 is pivotally connected to the adjacent crank 231. The body of the crank 231 is rotatably connected to one end of the traction support rod 233, and the other end of the traction support rod 233 is pivotally connected to the linkage seat 22.

[0025] Specifically, the linkage seat 22 includes a straight-top brake shoe 223, which is driven to the push mechanism 21 via a push-pull rod 221. The push-pull rod 221 or the straight-top brake shoe 223 is provided with an outwardly extending pivot shaft 222, which is pivotally connected to one end of the traction rod 233. The push mechanism 21 is provided with an outwardly extending pivot shaft 232, which is pivotally connected to the end of the crank rod 231.

[0026] In this embodiment, clamps 23 are pivotally connected to both sides of the push mechanism 21, and the side clamp brake shoes 234 on the clamps 23 can open and close relative to the two sides of the air-cooled brake disc 1 to achieve intermittent opening and closing braking. In addition, the side of the direct push brake shoe 223 near the air-cooled brake disc 1 has a curved structure, and the curved structure is provided with an outward convex arc surface that matches the shape of the cam curved surface 11 of the air-cooled brake disc 1. The outward convex arc surface presents a groove structure on the curved structure of the direct push brake shoe 223.

[0027] Example 2, based on Example 1, is a cam-disc air-cooled brake with side-linked intermittent braking, such as... Figures 9-14 As shown, the air-cooled brake disc 1 includes a central disc 12. A shaft hole 14 for the axle 3 to pass through is provided in the center of the central disc 12. Air-cooling channels are provided on the sides of the central disc 12. The air-cooling channels include air vent 121 and air vent 123 respectively located on both sides of the central disc 12, and an internal flow channel 122 connecting the air vent 121 and air vent 123. The internal flow channel 122 forms several heat dissipation channels on the central disc 12. Air vent 121 and air vent 123 are respectively located on the radial trajectory of the central disc 12, and are staggered on the central disc 12, so that the heat dissipation channels form a guiding slope or guiding curved surface within the central disc 12.

[0028] Example 3: Based on Example 1 or Example 2, this example describes a side-linked intermittent braking cam disc air-cooled brake, such as... Figures 9-14As shown, the air-cooled brake disc 1 also includes side discs 13 disposed on both sides of the central disc 12; and the side discs 13 are provided with a plurality of through holes 131, which communicate with the heat dissipation channel to form part of the air-cooling channel. Further, the two sides of the central disc 12 are respectively provided with bonding protrusions 124 that engage with the side discs 13 on both sides. Specifically, the bonding protrusions 124 include an inner key 1241 disposed near the shaft hole 14, an outer key 1243 disposed on the outer periphery of the central disc 12, and a diverging key strip 1242 disposed on the radius of the central disc 12. The diverging key strip 1242 and the adjacent outer key 1243 form a Y-shaped or T-shaped protrusion. In this embodiment, according to the concave-convex curved surface morphology of the air-cooled brake disc 1, the diverging key strip 1242 and the adjacent outer key 1243 form a Y-shape, and the outer key 1243 has a curved structure.

[0029] Example 4: Based on any of Examples 1 to 3, this example describes a side-linked intermittent braking cam disc air-cooled brake, such as... Figures 5-9 As shown, the pushing mechanism 21 uses a pushing cylinder. The central wheel 12 with air-cooling channels in the air-cooled brake disc 1 is detachably installed between the mating side wheel discs 13. The central wheel 12 can be selectively installed or removed according to actual usage requirements. The mating arrangement of the side wheel discs 13 adopts the mating assembly structure in the prior art, such as the bonding assembly structure; the specific mating assembly structure will not be described or listed here, as long as it can basically achieve the mating assembly. Furthermore, in this embodiment, the cam surface 11 can be replaced with a wavy surface, retaining the core effects of air cooling and lightweight design.

[0030] Example 5: A cam-disc air-cooled braking method for side-linked intermittent braking, implemented using a cam-disc air-cooled brake with side-linked intermittent braking from any of Examples 1 to 4, includes the following steps: The push mechanism 21 drives the push-pull rod 221 to pull the linkage seat 22 to extend and retract relative to the air-cooled brake disc 1, thereby causing the straight-push brake shoe 223 located on the periphery of the air-cooled brake disc 1 to extend and retract relative to the cam surface 11 of the air-cooled brake disc 1 along the trajectory of the cam surface 11; and drives the clamps 23 located on both sides of the air-cooled brake disc 1 to open and close intermittently to clamp the sides of the air-cooled brake disc 1. As the axle 3 drives the air-cooled brake disc 1 to rotate, airflow passes through the air-cooling channel of the air-cooled brake disc 1.

[0031] Specifically, when the pushing mechanism 21 pushes the push-pull rod 221 and drives the linkage seat 22 to move toward the concave surface of the cam surface 11 of the air-cooled brake disc 1, it drives the pull rod 233 to move downward, pulling the curved rod 231 pulled by the pull rod 233 to close relative to each other. The push-pull rod 221 drives the straight brake shoe 223 to move toward the concave surface of the cam surface 11 to press against the cam surface 11, and the side brake shoes 234 provided on the clamp 23 clamp the air-cooled brake disc 1 from both sides. When the air-cooled brake disc 1 rotates under the drive of the wheel axle, the concave and convex trajectory of the cam surface 11 of the air-cooled brake disc 1 drives the straight brake shoe 223 to extend and retract relative to the air-cooled brake disc 1, driving the clamp 23 located on both sides of the air-cooled brake disc 1 to open and close intermittently to clamp the side of the air-cooled brake disc 1. When the push mechanism 21 pulls back the push rod 221, it causes the linkage seat 22 to move away from the cam surface 11 of the air-cooled brake disc 1, which in turn causes the pull rod 233 to move upward, pushing the crank rod 231 pulled by the pull rod 233 to open relative to each other. The push rod 221 also causes the straight brake shoe 223 to move away from the cam surface 11, and causes the side brake shoes 234 provided on the clamp 23 to separate from both sides of the air-cooled brake disc 1, thus unlocking the air-cooled brake disc 1.

[0032] Working principle: This invention proposes an active air-cooling circulation system during braking, which improves heat dissipation efficiency compared to traditional ventilated discs, reduces temperature during long-distance braking, and suppresses thermal fade. With the same friction area, this invention reduces mass compared to traditional discs, effectively lowering under-axle weight and improving vehicle handling and fuel efficiency. The cam-face linkage brake shoes of this invention increase friction, shortening braking distance; the intermittent braking mode reduces continuous heat generation, significantly improving thermal stability and adapting to long-distance continuous braking. This invention offers efficient heat dissipation and low thermal stress, reducing wear on the brake disc and brake shoes and extending service life.

[0033] Example 6: Standard subway / urban rail vehicle brake disc, using a cam-type air-cooled brake with side-linked intermittent braking from any of Examples 1 to 4.

[0034] The application scenarios are subway type B trains and urban rail transit. The structural parameters are as follows: the diameter of the air-cooled brake disc 1 is 580mm; the thickness of the air-cooled brake disc 1 is 32mm; multiple laterally spaced, interconnected air-cooling channels on the central disc 12 form spaced heat dissipation fins on the air-cooled brake disc 1, creating 16 fan blades; the through holes 131 on the side discs 13 serve as air vents, with 8 sets of through holes 131. The air-cooled brake disc 1 is made of ductile iron QT450-10.

[0035] The braking and air-cooling processes are separated: When the vehicle brakes, the air-cooled brake disc 1 rotates with the axle 3. The air-cooling channel of the air-cooled brake disc 1 acts as a fan blade to actively draw in cooling air, which enters the disc body gap of the air-cooled brake disc 1 through the through hole 131 of the side disc 13. After being guided by the cam surface 11 and the blades, it is discharged from the air outlet. The direct-acting brake shoe 223 and the side-clamping brake shoe 234 cooperate to apply the brakes along the cam surface 11, and the frictional heat is quickly carried away by the forced airflow. The single-piece weight of this invention is lighter than that of traditional discs, which is also more conducive to heat dissipation.

[0036] Example 7: The high-speed train brake disc adopts a cam-type air-cooled brake with side-linked intermittent braking in any of Examples 1 to 4.

[0037] The application scenario is for high-speed trains with speeds of 250km / h–350km / h.

[0038] The structural parameters are as follows: the diameter of the air-cooled brake disc 1 is 650mm, the thickness of the air-cooled brake disc 1 is 35mm, and multiple laterally spaced air-cooling channels on the central disc 12 form spaced heat dissipation fins on the air-cooled brake disc 1, resulting in 18 fan blades; the side discs 13 are integrally cast steel, and the through holes 131 of the side discs 13 serve as air vents, with 8 sets of through holes 131. Furthermore, the surface of the air-cooled brake disc 1 is coated with a wear-resistant coating as used in the prior art. The single-piece weight of this invention is lighter than that of traditional discs, and it is also more conducive to heat dissipation.

[0039] Example 8: The brake disc of a heavy-duty freight rail vehicle adopts a cam-type air-cooled brake with side-linked point braking in any of Examples 1 to 4.

[0040] The application scenario is: heavy-haul freight trains on main lines.

[0041] The structural parameters are as follows: the diameter of the air-cooled brake disc 1 is 720mm, the thickness of the air-cooled brake disc 1 is 40mm, and multiple laterally spaced air-cooling channels on the central wheel 12 form spaced heat dissipation fins on the air-cooled brake disc 1, forming fan blades. The fan blades are made of high-strength alloy, and the air inlet is enlarged. The single-piece weight of this invention is lighter than that of traditional discs, and it is also more conducive to heat dissipation.

[0042] The above specific embodiments are specific support for the concept proposed in this invention, and should not be used to limit the scope of protection of this invention. Any equivalent changes or modifications made on the basis of this technical solution in accordance with the technical concept proposed in this invention shall still fall within the scope of protection of this invention.

Claims

1. A cam-disc type air-cooled brake with side-linked intermittent braking, characterized in that, include: Air-cooled brake disc mounted on the axle, and side brake shoe linkage mechanism located around the air-cooled brake disc; The air-cooled brake disc is provided with several through air-cooling channels, and the outer periphery of the air-cooled brake disc is provided with a cam surface. The side brake shoe linkage mechanism includes a linkage base body that is driven and connected to the push mechanism. The linkage base body is driven and connected to a clamp that can open and close relative to the air-cooled brake disc, and a straight-push brake shoe that can extend and retract relative to the cam surface of the air-cooled brake disc. The clamp is provided with a side clamp brake shoe, which can be displaced relative to the side of the air-cooled brake disc under the action of the clamp. The push mechanism drives the linkage seat to drive the clamps and the direct-push brake shoes to achieve intermittent opening and closing of the air-cooled brake disc.

2. The cam-disc air-cooled brake with side-linked intermittent braking according to claim 1, characterized in that: The air-cooled brake disc includes a central wheel disc, and the air-cooling channel is provided on the side of the central wheel disc; the air-cooling channel includes air inlet one and air inlet two respectively provided on both sides of the central wheel disc, and an internal flow channel connecting air inlet one and air inlet two, and the internal flow channel forms several heat dissipation channels on the central wheel disc.

3. The cam-disc air-cooled brake with side-linked intermittent braking according to claim 2, characterized in that: The air vents 1 and 2 are respectively set on the radius trajectory of the central wheel, and the air vents 1 and 2 are staggered on the central wheel, so that the heat dissipation channel forms a guide slope or guide curve within the central wheel.

4. The cam-disc air-cooled brake with side-linked intermittent braking according to claim 2, characterized in that: The air-cooled brake disc includes mating side discs, and the side discs have several through holes forming the heat dissipation channels, which serve as air-cooling channels.

5. The cam-disc air-cooled brake with side-linked intermittent braking according to claim 4, characterized in that: The center wheel is detachably mounted between the center wheel and the side wheels, and the two sides of the center wheel are respectively provided with keying protrusions that mate with the side wheels on both sides.

6. The cam-disc air-cooled brake with side-linked intermittent braking according to claim 2, characterized in that: The air-cooled brake disc has a shaft hole in the middle for the axle to pass through. The cam surface of the air-cooled brake disc forms a closed-loop concave-convex surface structure on the outer periphery of the air-cooled brake disc, and the closed-loop concave-convex surface structure is a symmetrical structure.

7. The cam-disc air-cooled brake with side-linked intermittent braking according to claim 6, characterized in that: The clamp includes a pair of curved rods that can open and close relative to each other. One end of each curved rod is provided with a side clamping shoe, and the other end of each curved rod is pivotally connected to an adjacent curved rod. The rod body of each curved rod is rotatably connected to one end of a traction support rod, and the other end of the traction support rod is pivotally connected to a linkage seat.

8. The cam-disc air-cooled brake with side-linked intermittent braking according to claim 7, characterized in that: The linkage seat includes a push-pull rod body, one end of which is driven and connected to the push mechanism, and the other end of which is connected to the straight brake shoe. The push-pull rod body or the straight brake shoe is provided with an outwardly extending pivot shaft, which is pivotally connected to one end of the traction support rod through the pivot shaft. The pushing mechanism is provided with an outwardly extending pivot shaft two, which is pivotally connected to the end of the crank rod.

9. The cam-disc air-cooled brake with side-linked intermittent braking according to claim 8, characterized in that: The push mechanism is pivotally connected to clamps on both sides, and the clamps drive the side brake shoes to open and close relative to the air-cooled brake disc to achieve intermittent opening and closing braking.

10. The cam-disc air-cooled brake with side-linked intermittent braking according to claim 9, characterized in that: The side of the direct-acting brake shoe closest to the air-cooled brake disc has a curved structure, and the curved structure has an outwardly convex arc surface that matches the cam curved surface shape of the air-cooled brake disc. When the straight brake shoe is pressed down and abuts against the concave part of the cam surface, the linkage seat drives the clamp to clamp the side brake shoe relative to both sides of the air-cooled brake disc for intermittent braking. When the straight brake shoe retracts and resets along the convex side of the cam surface, the linkage seat drives the clamp to separate and release the side brake shoe relative to both sides of the air-cooled brake disc.

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