A braking device with anti-heat fade function and its installation method

Abstract

This invention discloses a braking device with anti-fading function and its installation method, relating to the field of braking device technology. It is mounted on the wheel hub drive shaft of a motor vehicle and includes a brake disc assembly, a resistance device, and a control assembly, which are sequentially arranged on the drive shaft connected to the wheel hub. In this invention, the brake disc assembly moves with the wheel hub, while the control assembly mainly receives braking signals in the form of hydraulic oil and controls the resistance device and brake disc assembly to brake through friction and gear damping. The resistance device is the main source of braking force. Existing braking devices experience fading after the friction layer heats up, a common problem in current braking systems. However, the braking device of this invention maintains good braking performance because the spring resistance of the resistance spring against the resistance gear teeth is always present, and the circumferential superimposed resistance is large.

Description

Technical Field

[0001] This invention relates to the field of braking device technology, specifically to an installation method for a braking device with anti-fading function. Background Technology

[0002] Brakes decelerate a vehicle to a safe speed or bring it to a stop at an appropriate rate. When driving downhill or decelerating, brakes maintain a stable speed and reliably bring the vehicle to a stop. Common brake types include disc brakes and drum brakes; disc brakes are currently the most common type found in sedans, SUVs, and MPVs.

[0003] Disc brakes primarily achieve braking by clamping the brake disc with brake calipers. The brake disc is directly exposed to the air. While the vehicle is in motion, the high-speed airflow can carry away the heat from the brake disc. However, if the vehicle is going downhill and braking for a long distance to control its speed, or if there is continuous heavy braking, the heat will accumulate on the brake disc. When the temperature of the braking system reaches a certain level, its braking force will decrease significantly, thereby increasing the braking distance and increasing the vehicle's safety risks. Summary of the Invention

[0004] The purpose of this invention is to provide an installation method for a brake device with anti-heat fade function, so as to solve the problems mentioned in the background art.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] The present invention provides a braking device with anti-fading function, which is mounted on the wheel hub of a motor vehicle and includes a brake disc assembly, a resistance device and a control component, wherein the brake disc assembly, the resistance device and the control component are sequentially arranged on the drive shaft connected to the wheel hub.

[0007] The brake disc assembly includes a transition gear disc, a pressure disc, and a friction gear disc fixedly connected to the wheel hub. The outer edge of the friction gear disc is circumferentially provided with friction disc teeth, and the transition gear disc is provided with transition teeth corresponding to the friction disc teeth. The surfaces of the friction gear disc and the transition gear disc are tightly fitted together, and both have roughened surfaces at the contact point to improve the coefficient of friction. The pressure disc is used to ensure that the transition gear disc is tightly fitted to the friction gear disc. A fixed friction plate is also fixed on the surface of the friction gear disc.

[0008] The resistance device includes a resistance disk fixedly arranged around the transmission shaft, and a friction assembly that engages with the fixed friction plate is mounted on the disk surface of the resistance disk; resistance gear teeth are arranged circumferentially on the outer edge of the resistance disk, and the resistance gear teeth are rotatably connected to the resistance disk; resistance springs are arranged on both sides of the resistance gear teeth at the rotatable connection point with the resistance disk, and the resistance springs are used to provide damping when the resistance gear teeth rotate.

[0009] The control assembly includes a sliding ring, a meshing gear sleeve, and a stretching cylinder that drives the sliding ring to slide along the transmission shaft. The meshing gear sleeve has inner teeth that can mesh with the friction disc teeth, transition teeth, and resistance teeth. The meshing gear sleeve can be embedded in the sliding ring and rotate with it, and the outer ring surface of the meshing gear sleeve is in frictional contact with the inner ring surface of the sliding ring. The stretching cylinder includes a hydraulic piston rod and a cylinder body. The working end of the hydraulic piston rod is connected to the sliding ring, and both ends of the cylinder body are connected to a hydraulic oil circuit controlled by a solenoid valve. When the hydraulic piston rod extends, the sliding ring slides along the transmission shaft towards the hub, causing the meshing gear sleeve to mesh with the friction disc teeth, transition teeth, and resistance teeth simultaneously. When the hydraulic piston rod returns to its original position, the sliding ring slides along the transmission shaft away from the hub, causing the meshing gear sleeve to disengage from the friction disc teeth and transition teeth.

[0010] Furthermore, the clamping plate includes a support ring, a retaining ring, and a fixing ear, with the fixing ear located on the inner side of the support ring; the surface of the friction gear disk has a coaxially formed annular groove, the support ring is fitted into the annular groove, and the retaining ring is used to press the transition gear disk onto the friction gear disk; the fixing ear is used to install a locking bolt, and a threaded hole is provided on the surface of the friction gear disk corresponding to the fixing ear; a clamping spring is also provided between the locking bolt and the fixing ear.

[0011] Furthermore, a mounting hole is provided at the center of the friction gear disk, which is used to connect the drive shaft and the hub; the fixed friction plate is provided with ventilation holes.

[0012] Furthermore, the friction assembly includes a moving friction plate and a hydraulic structure for driving the moving friction plate to move toward the stationary friction plate. The hydraulic structure includes a hydraulic cylinder housing and a clamping cylinder housing fixed on the surface of the resistance plate. The hydraulic cylinder housing is connected to a hydraulic cylinder plug with a connecting nozzle. A hydraulic piston is disposed inside the hydraulic cylinder housing. A clamping piston is disposed inside the clamping cylinder housing. The clamping piston has a flange for assembling a return spring. The moving friction plate is mounted on the working end of the clamping piston. The end of the hydraulic piston abuts against the piston end of the clamping piston.

[0013] Furthermore, the resistance disc is sleeved on the drive shaft via a bearing structure, and the resistance disc is rigidly connected to the vehicle suspension or kingpin.

[0014] Furthermore, at least two tensioning cylinders are arranged circumferentially around the drive shaft, and the cylinder body of the cylinder is fixed on an annular support plate. The annular support plate has at least two fixing holes circumferentially, which are used to fix assembly connecting bolts. The other end of the connecting bolt is threaded to the resistance plate, and the resistance plate has threaded connection holes on its surface corresponding to the connecting bolt.

[0015] Furthermore, the sliding ring has a sliding hole for the connecting bolt to pass through, and the sliding ring also has a supporting inner ring for embedding the meshing tooth sleeve. Correspondingly, the meshing tooth sleeve has an annular support platform corresponding to the supporting inner ring, and the end face of the sliding ring is closed by a threaded plug. The hydraulic piston rod consists of a hydraulic piston body, a threaded rod, and a threaded joint. The sliding ring has a threaded fixing hole corresponding to the threaded joint.

[0016] The present invention also provides a method for installing a brake device with a function to prevent heat fade, which includes the following steps:

[0017] S1. Fit the sliding ring with the meshing gear sleeve, install the tensioning cylinder on the annular support plate, connect the hydraulic piston rod of the tensioning cylinder to the sliding ring, and assemble the connecting bolt through the sliding hole into the fixing hole of the annular support plate to complete the assembly of the control components.

[0018] S2. Press the transition gear disc onto the friction gear disc using the clamping disc, and adjust the locking bolts to make the clamping spring generate appropriate clamping force, thus completing the assembly of the brake disc assembly;

[0019] S3. First, put the control component on the drive shaft, then put the resistance plate on the drive shaft through the bearing structure, and rigidly connect the resistance plate to the vehicle suspension or kingpin. Then, install the other end of the connecting bolt on the resistance plate through the threaded connection hole to complete the assembly of the resistance device and control component.

[0020] S4. Mount the brake disc assembly between the wheel hub and the drive shaft through the mounting holes, and maintain an appropriate clearance between the stationary friction pad and the friction assembly mounted on the resistance disc.

[0021] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0022] In this invention, when the brake device is not braking, the friction gear disc and the transition gear disc in the brake disc assembly are linked by the friction and pressing action of the pressure disc and the rough surface, and rotate together with the wheel hub. Meanwhile, the resistance device and the control component maintain an appropriate gap with the brake disc assembly when the hydraulic oil circuit is not pressurized, thereby ensuring the normal rotation of the wheel hub.

[0023] During braking, the hydraulic circuit is pressurized. On one hand, the friction components and the fixed friction plates are tightly pressed together, creating a friction braking effect. On the other hand, the hydraulic piston rod of the extension cylinder extends, moving the sliding ring towards the brake disc assembly. The meshing sleeve will sequentially mesh with the resistance gear teeth, transition gear teeth, and friction disc gear teeth. During initial braking, the friction gear disc and the wheel hub maintain a high speed synchronously. The friction disc gear teeth will drive the meshing sleeve to rotate, and the meshing sleeve will also maintain meshing with the resistance gear teeth. Due to the fixed state of the resistance disc, the meshing sleeve can only drive the resistance gear teeth to deflect around their axis on the resistance disc. Resistance springs are set on both sides of the resistance gear teeth. When deflecting, one side is subjected to pressure and the other side is subjected to tension. The resistance value of the springs is relatively large, so the meshing sleeve experiences a large resistance when rotating. The meshing sleeve then transmits this rotational resistance to the friction gear disc, thereby producing a resistance braking effect on the wheel hub.

[0024] Under the aforementioned braking conditions, since the sliding ring and the meshing sleeve are engaged, there is also friction on their mating surfaces, which generates an auxiliary resistance braking effect.

[0025] In the technical solution of this invention, since the initial rotational speed of the hub is relatively high, in order to avoid the meshing sleeve directly engaging with the friction gear disk at high speeds and generating a large impact force, this invention provides a transition gear disk. Its function is to reduce the impact during meshing and ensure a smooth meshing state. Specifically, since the friction gear disk and the transition gear disk are constantly moving, when the meshing sleeve engages with the transition gear disk, the friction gear disk has already begun to decelerate under the action of the friction assembly, and the transition gear disk is decelerated by the engagement of the meshing sleeve (the transition gear disk can rotate relative to the friction gear disk, so the impact of engagement is small). However, the transition gear disk will still maintain a certain rotational angular velocity under the frictional force of the friction gear disk, but this velocity is lower than the rotational speed of the friction gear disk itself. The meshing sleeve will also be driven by the transition gear disk to generate a certain rotational angular velocity. Therefore, when the meshing sleeve continues to advance and engage with the friction gear disk, due to the certain initial angular velocity, the meshing process is relatively smooth and the impact is reduced.

[0026] Conventional braking systems often experience thermal fade after the friction layer heats up, a common problem in current braking systems. However, the braking system of this invention maintains good braking performance because the spring resistance between the resistance spring and the resistance gear teeth is constant, and the circumferential cumulative resistance is significant. Attached Figure Description

[0027] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0028] Figure 1This is a schematic diagram of the installation state of the braking device in this invention.

[0029] Figure 2 This is a schematic diagram of the braking device in this invention.

[0030] Figure 3 yes Figure 2 A schematic diagram of the structure of the intermediate friction gear disk.

[0031] Figure 4 yes Figure 2 A schematic diagram of the intermediate transition gear disk.

[0032] Figure 5 yes Figure 2 A schematic diagram of the structure of the medium-pressure clamping plate.

[0033] Figure 6 yes Figure 2 A schematic diagram of the medium resistance device.

[0034] Figure 7 yes Figure 6 A schematic diagram of the structure of the friction assembly.

[0035] Figure 8 yes Figure 2 A schematic diagram of the control component.

[0036] Figure 9 yes Figure 8 A schematic diagram of the middle sliding ring.

[0037] Figure 10 yes Figure 8 A schematic diagram of the structure of the interlocking gear sleeve.

[0038] Figure 11 yes Figure 8 A schematic diagram of the assembly structure of the tensioning cylinder.

[0039] Figure 12 This is one of the diagrams showing the engagement state of the meshing gear sleeve with the resistance gear teeth, transition gear teeth, and friction disc gear teeth in this invention.

[0040] Figure 13 This is the second diagram showing the engagement state of the meshing gear sleeve with the resistance gear teeth, transition gear teeth, and friction disc gear teeth in this invention.

[0041] Figure 14 This is the third diagram showing the engagement state of the meshing gear sleeve with the resistance gear teeth, transition gear teeth, and friction disc gear teeth in this invention.

[0042] Figure 15 This is a schematic diagram of the triangular cone-shaped surface structure of the resistance gear teeth, transition gear teeth, and friction disc gear teeth in this invention.

[0043] In the picture:

[0044] 100. Wheel hub;

[0045] 200 Brake disc assembly; 210 Friction gear disc; 211 Friction disc teeth; 212 Mounting hole; 213 Ring groove; 214 Threaded hole; 220 Transition gear disc; 221 Transition teeth; 230 Pressure plate; 231 Support ring; 232 Retaining ring; 233 Fixing lug; 234 Locking bolt; 235 Pressure spring; 240 Rough surface; 250 Fixed friction plate; 251 Ventilation hole;

[0046] 300. Resistance device; 310. Resistance disc; 311. Resistance gear teeth; 312. Resistance spring; 313. Threaded connection hole; 314. Rotating shaft; 315. Edge guard; 320. Friction assembly; 321. Moving friction plate; 322. Hydraulic cylinder housing; 323. Pressing cylinder housing; 324. Hydraulic cylinder plug; 325. Hydraulic piston; 326. Pressing piston; 327. Return spring; 328. Cover; 330. Bearing structure;

[0047] 400. Control component; 410. Sliding ring; 411. Sliding hole; 412. Support inner ring; 413. Threaded plug; 414. Threaded fixing hole; 420. Engaging gear sleeve; 421. Inner gear tooth; 422. Support platform; 430. Tensioning cylinder; 431. Hydraulic piston rod; 4311. Hydraulic piston body; 4312. Threaded rod; 4313. Threaded joint; 432. Actuating cylinder body; 440. Solenoid valve; 450. Annular support plate; 451. Fixing hole; 452. Connecting bolt;

[0048] 500. Drive shaft. Detailed Implementation

[0049] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0050] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0051] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0052] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0053] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0054] like Figure 1 As shown, an embodiment of the present invention provides a braking device with a function to prevent heat fade, which is mounted on the drive shaft of the wheel hub 100 of a motor vehicle. It includes a brake disc assembly 200, a resistance device 300 and a control component 400, and the brake disc assembly 200, the resistance device 300 and the control component 400 are sequentially arranged on the drive shaft 500 connected to the wheel hub 100.

[0055] In this invention, the brake disc assembly 200 moves in tandem with the wheel hub 100, while the control component 400 primarily receives brake signals in the form of hydraulic oil and controls the brake disc assembly 200 to brake through both friction and gear damping. The resistance device 300 is the main source of braking force. The specific structural forms of the brake disc assembly 200, resistance device 300, and control component 400 in this embodiment are as follows:

[0056] Please see Figures 1-5 As shown, the brake disc assembly 200 includes a transition gear disc 220, a pressure disc 230, and a friction gear disc 210 fixedly connected to the hub 100. Friction disc teeth 211 are circumferentially arranged on the outer edge of the friction gear disc 210. The transition gear disc 220 has transition teeth 221 corresponding to the friction disc teeth 211. The surfaces of the friction gear disc 210 and the transition gear disc 220 are tightly fitted together, and both have roughened surfaces 240 at the contact point to improve the coefficient of friction. The pressure disc 230 is used to ensure that the transition gear disc 220 is tightly fitted to the friction gear disc 210. A fixed friction plate 250 is also fixed on the surface of the friction gear disc 210.

[0057] To facilitate the assembly of the clamping disc 230 without affecting the functions of the friction gear disc 210 and the transition gear disc 220, the clamping disc 230 includes a support ring 231, a retaining ring 232, and a fixing lug 233. The fixing lug 233 is located on the inner side of the support ring 231. The friction gear disc 210 has a coaxially formed annular groove 213 on its surface. The support ring 231 fits into the annular groove 213, and the retaining ring 232 is used to press the transition gear disc 220 against the friction gear disc 210. On the friction gear disk 210, the fixing lug 233 is used to install the locking bolt 234, and a threaded hole 214 is provided on the disk surface of the friction gear disk 210 corresponding to the fixing lug 233. A compression spring 235 is also provided between the locking bolt 234 and the fixing lug 233. The compression spring 235 presses against the cap end of the locking bolt 234 on one side and the fixing lug 233 on the other side, so that the retaining ring 232 presses the transition gear disk 220 onto the friction gear disk 210. With the above structure, when assembling the brake disc assembly 200, the clamping force of the clamping disc 230 can be changed by adjusting the locking bolt 234, and it is beneficial to maintain an appropriate elastic buffer between the transition gear disk 220 and the friction gear disk 210 to reduce impact.

[0058] In addition, since both the transition gear disk 220 and the pressure disk 230 are mounted on the friction gear disk 210, in order to facilitate the installation of the friction gear disk 210, the friction gear disk 210 in this invention is provided with a mounting hole 212 at its center. The mounting hole 212 is used to connect the drive shaft 500 and the hub 100. At the same time, in order to reduce heat fade, the fixed friction plate 250 is provided with ventilation holes 251, and the ventilation holes 251 are evenly distributed in a circular array around the center of the fixed friction plate 250.

[0059] Please see Figures 6-7 As shown, and in combination Figure 2 The resistance device 300 includes a resistance disk 310 fixedly arranged around the transmission shaft 500. A friction assembly 320 that brakes with the fixed friction plate 250 is mounted on the disk surface of the resistance disk 310. Resistance teeth 311 are arranged circumferentially on the outer edge of the resistance disk 310, and the resistance teeth 311 are rotatably connected to the resistance disk 310. Resistance springs 312 are arranged on both sides of the resistance teeth 311 at the rotatable connection point with the resistance disk 310. The resistance springs 312 are used to provide damping when the resistance teeth 311 rotate.

[0060] Specific combination Figure 6 The rotating shaft connecting the resistance wheel tooth 311 and the resistance disk 310 can be located in the middle of the resistance wheel tooth 311. The rotating shafts are evenly distributed around the periphery of 310 and are fixedly installed through the through holes on the edge of 310. The resistance spring 312 is assembled on both sides of the root of the resistance wheel tooth 311. The assembly method can be welding, riveting or mechanical piling connection. One end of the resistance spring 312 is connected to the resistance wheel tooth 311, and the other end is connected to the mounting groove on the resistance disk 310 for assembling the resistance wheel tooth 311. Thus, when the resistance wheel tooth 311 rotates to either side, the resistance spring 312 on one side is under pressure, and the resistance spring 312 on the other side is under tension. In this embodiment, the resistance spring 312 should be a spring with a large resistance value, and after assembly, the resistance spring 312 should be in a normal no-load state.

[0061] Specific combination Figure 7The friction assembly 320 includes a moving friction plate 321 and a hydraulic structure for driving the moving friction plate 321 to move toward the fixed friction plate 250. (Note: The fixed friction plate 250 refers to the friction plate that does not move axially along the direction of the transmission shaft 500, but the fixed friction plate 250 rotates with the friction gear disk 210. The moving friction plate 321 refers to the friction plate that moves axially along the direction of the transmission shaft 500.) The hydraulic structure includes a hydraulic cylinder housing 322 and a clamping cylinder housing 323 fixed on the surface of the resistance disk 310. The hydraulic cylinder housing 322 is connected to a hydraulic cylinder plug 324 with a connecting nozzle. A hydraulic piston 325 is provided inside the hydraulic cylinder housing 322. A clamping piston 326 is provided inside the clamping cylinder housing 323. The clamping piston 326 has a flange for assembling a return spring 327. The moving friction plate 321 is installed at the working end of the clamping piston 326. The end of the hydraulic piston 325 abuts against the piston end of the clamping piston 326.

[0062] In an embodiment of the present invention, the hydraulic cylinder housing 322 and the clamping cylinder housing 323 are connected in a "convex" shape, which has a special effect: if the hydraulic piston 325 is directly connected to the moving friction plate 321, the moving friction plate 321 will exert a large lateral force on the hydraulic piston 325 during braking, which will damage the structure of the hydraulic cylinder. However, the "convex" cylinder design in the present invention, through the hydraulic piston 325 pushing the clamping piston 326 to link the moving friction plate 321 to squeeze the fixed friction plate 250, so that the lateral force of the fixed friction plate 250 on the moving friction plate 321 acts on the clamping cylinder housing 323, without damaging the hydraulic cylinder structure, thus ensuring the service life of the structure.

[0063] To facilitate the assembly and manufacturing of the above structure, in this embodiment, the hydraulic cylinder housing 322 and the clamping cylinder housing 323 can be integrally formed, with different inner diameters. The clamping cylinder housing 323 has a cap 328 threadedly connected to one end of the moving friction plate 321 to limit the extension of the clamping piston 326. In this embodiment, the clamping piston 326 is threadedly connected to the moving friction plate 321. Figure 7 As shown, a threaded connection portion that can be screwed into the clamping piston 326 is provided behind the moving friction plate 321.

[0064] In addition, in this embodiment, in order to facilitate the fixing of the resistance plate 300, the resistance plate 300 is sleeved on the drive shaft 500 through the bearing structure 330, and the resistance plate 300 is rigidly connected to the vehicle suspension or kingpin.

[0065] Please see Figures 8-11 The structure shown, and combined with Figure 2The control component 400 includes a sliding ring 410, a meshing gear sleeve 420, and a stretching cylinder 430 that drives the sliding ring 410 to slide along the transmission shaft 500. The meshing gear sleeve 420 has inner gear teeth 421 that can mesh with the friction disc gear teeth 211, transition gear teeth 221, and resistance gear teeth 311. The meshing gear sleeve 420 can be embedded in the sliding ring 410 and rotate in cooperation with the sliding ring 410, and the outer ring surface of the meshing gear sleeve 420 frictionally engages with the inner ring surface of the sliding ring 410. The stretching cylinder 430 includes a hydraulic piston rod 431 and a cylinder body 432. The working end of the piston rod 431 outside the cylinder is connected to the sliding ring 410. The two ends of the actuating cylinder 432 are respectively connected to the hydraulic oil circuit controlled by the solenoid valve 440. When the hydraulic piston rod 431 extends, the sliding ring 410 slides along the drive shaft 500 toward the hub 100, so that the meshing sleeve 420 meshes with the friction disc gear teeth 211, the transition gear teeth 221, and the resistance gear teeth 311 at the same time. When the hydraulic piston rod 431 returns to its original position, the sliding ring 410 slides along the drive shaft 500 away from the hub 100, so that the meshing sleeve 420 disengages from the friction disc gear teeth 211 and the transition gear teeth 221.

[0066] For details, please refer to [link / reference]. Figure 11 As shown, to maintain the stability and reliability of the control of the 410 sliding ring, at least two tensioning cylinders 430 are provided symmetrically around the transmission shaft 500. The cylinder body 432 of the cylinder is fixed on the annular support plate 450. The annular support plate 450 has four fixing holes 451 circumferentially (at least two should be provided symmetrically around the center of the annular support plate). The fixing holes 451 are used to fix the assembly connecting bolts 452. The other end of the connecting bolts 452 is threaded to the resistance plate 310, and the resistance plate 310 has threaded connecting holes 313 on its surface corresponding to the connecting bolts 452.

[0067] For details, please refer to [link / reference]. Figure 9 As shown, the sliding ring 410 has a sliding hole 411 for the connecting bolt 452 to pass through, and the sliding ring 410 also has a supporting inner ring 412 for embedding the meshing toothed sleeve 420. Correspondingly, the meshing toothed sleeve 420 has an annular support platform 422 corresponding to the supporting inner ring 412, and the end face of the sliding ring 410 is closed by a threaded plug 413. The hydraulic piston rod 431 is composed of a hydraulic piston body 4311, a threaded rod 4312, and a threaded joint 4313. The sliding ring 410 has a threaded fixing hole 414 corresponding to the threaded joint 4313.

[0068] The installation method of the brake device with anti-heat fade function described above in the embodiments of the present invention can be referred to as follows:

[0069] S1. Fit and assemble the sliding ring 410 with the meshing sleeve 420, install the tensioning cylinder 430 on the annular support plate 450, connect the hydraulic piston rod 431 of the tensioning cylinder 430 to the sliding ring 410, and assemble the connecting bolt 452 through the sliding hole 411 into the fixing hole 451 of the annular support plate 450 to complete the assembly of the control component 400.

[0070] S2. The transition gear disk 220 is pressed and assembled onto the friction gear disk 210 by the clamping disk 230, and the locking bolt 234 is adjusted so that the clamping spring 235 generates an appropriate clamping force to complete the assembly of the brake disk assembly 200.

[0071] S3. First, the control component 400 is fitted onto the drive shaft 500. Then, the resistance plate 310 is fitted onto the drive shaft 500 through the bearing structure 330. The resistance plate 310 is rigidly connected to the vehicle suspension or kingpin. Then, the other end of the connecting bolt 452 is installed on the resistance plate 310 through the threaded connection hole 313 to complete the assembly of the resistance device 300 and the control component 400.

[0072] S4. Mount the brake disc assembly 200 between the wheel hub 100 and the drive shaft 500 through the mounting hole 212, and maintain an appropriate gap between the fixed friction plate 250 and the friction assembly 320 mounted on the resistance disc 310.

[0073] When not braking, the friction gear disk 210 and the transition gear disk 220 in the brake disc assembly 200 are linked by the frictional pressing action of the pressure disk 230 and the rough surface 240, and rotate together with the wheel hub 100. Meanwhile, the resistance device 300 and the control component 400 maintain an appropriate gap with the brake disc assembly 200 when the hydraulic oil circuit is not pressurized, thereby ensuring the normal rotation of the wheel hub 100.

[0074] Please see Figure 2 and Figure 11 As shown, when the brake is not applied, the solenoid valve 440 controls the high-pressure oil to enter port A and the low-pressure oil to flow out from port B, causing the hydraulic piston body 4311 to retract and lock to the bottom of the actuating cylinder 432. At the same time, it pulls and locks the sliding ring 410 and the meshing sleeve 420 to reliably separate from the brake disc assembly 200.

[0075] Please see Figures 12-14As shown, in the braking state, the hydraulic oil circuit is pressurized. When the brake is applied, the solenoid valve 440 controls the high-pressure oil to enter port B, and the low-pressure oil to flow out from port A, causing the hydraulic piston body 4311 to extend and lock to the top of the actuating cylinder 432. At the same time, it pushes and locks the sliding ring 410 and the meshing sleeve 420 to reliably connect with the brake disc assembly 200. At this time, on the one hand, the friction assembly 320 and the fixed friction plate 250 are in close contact to generate a friction braking effect. On the other hand, due to the extension of the hydraulic piston rod 431 of the actuating cylinder 430, the sliding ring 410 moves towards the brake disc assembly 200. The meshing sleeve 420 will mesh with the resistance gear teeth 311, the transition gear teeth 221, and the friction disc gear teeth 211 in sequence. Since the friction gear disc 210 and the hub 100 maintain a high speed synchronously during the initial braking, the friction disc gear teeth 211 will drive the meshing sleeve 420 to rotate. At this time, the resistance gear 311 is also in a meshing state. Due to the fixed state of the resistance disk 310, the meshing sleeve 420 can only drive the resistance gear 311 to deflect around its axis on the resistance disk 310. Resistance springs 312 are provided on both sides of the resistance gear 311. When deflecting, one side is subjected to pressure and the other side is subjected to tension. The resistance value of the spring is relatively large, so the meshing sleeve 420 is subjected to a large resistance when rotating. The meshing sleeve 420 then transmits this rotational resistance to the friction gear disk 210, thereby producing a resistance braking effect on the hub 100.

[0076] In the aforementioned braking state, since the sliding ring 410 and the meshing sleeve 420 are engaged, there is also friction on their mating surfaces to generate an auxiliary resistance braking effect. In some embodiments of the present invention, the mating surfaces of the two can be roughened to increase friction.

[0077] In the technical solution of the present invention, since the initial rotational speed of the hub 100 is relatively large, in order to avoid the meshing sleeve 420 directly engaging with the friction gear disk 210 at high speed and generating a large impact force, the present invention provides a transition gear disk 220, the function of which is to reduce the impact during meshing and ensure a smooth meshing state. Specifically, since the friction gear disk 210 and the transition gear disk 220 are constantly moving, when the meshing sleeve 420 engages with the transition gear disk 220, the friction gear disk 210 begins to decelerate under the action of the friction component 320, and the transition gear disk 220 is decelerated by the engagement sleeve 420 (the transition gear disk 220 can rotate relative to the friction gear disk 210, so the impact of the engagement between the transition gear disk 220 and the meshing sleeve 420 is small). However, the transition gear disk 220 will still maintain a certain rotational angular velocity under the frictional force of the friction gear disk 210, but this velocity is lower than the rotational speed of the friction gear disk 210 itself. The meshing sleeve 420 will also be driven by the transition gear disk 220 to generate a certain rotational angular velocity. Therefore, when the meshing sleeve 420 continues to advance and engage with the friction gear disk 210, the engagement process is relatively smooth and the impact is reduced due to the certain initial angular velocity.

[0078] Please combine Figure 15 As shown, in the direction of the gear meshing contact surface between the friction disc gear teeth 211, the transition gear teeth 221 and the inner gear teeth 421, the end face profile of a single gear tooth has a large inward inclination angle along the gear axis, and the end face profile of the gear tooth presents a triangular cone shape, as shown. Figures 12-14 In the diagram, one side of the teeth of the friction disc gear 211, the transition gear 221 and the inner gear 421 is drawn as a triangle, which represents the large inclination angle of the tooth profile on the end face of the aforementioned gear. This design can ensure smooth meshing of the gears to the maximum extent.

[0079] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A brake device with a function of preventing thermal degradation, which is equipped to a wheel hub drive shaft of a motor vehicle, characterized in that, The application relates to a brake disc assembly, a resistance device and a control assembly, and the brake disc assembly, the resistance device and the control assembly are sequentially arranged on a transmission shaft connected with a wheel hub. The brake disc assembly comprises a transition gear disc, a pressing disc and a friction gear disc fixedly connected with the wheel hub transmission shaft, the outer edge of the friction gear disc is provided with friction disc gear teeth in a circumferential direction, the transition gear disc is provided with transition gear teeth corresponding to the friction disc gear teeth; the disc surfaces of the friction gear disc and the transition gear disc are tightly attached to each other, and rough surfaces are arranged at the attachment positions of the two disc surfaces to increase the friction coefficient; the pressing disc is used for tightly attaching the transition gear disc to the friction gear disc; and a fixed friction plate is further fixed on the disc surface of the friction gear disc. The resistance device comprises a resistance disc fixedly arranged around the transmission shaft, the disc surface of the resistance disc is provided with a friction assembly matched with the fixed friction plate; the outer edge of the resistance disc is provided with resistance gear teeth in a circumferential direction, and the resistance gear teeth are rotationally connected with the resistance disc; resistance springs are arranged on both sides of the resistance gear teeth at the positions where the resistance gear teeth are rotationally connected with the resistance disc, and the resistance springs are used for providing damping when the resistance gear teeth rotate. The control assembly comprises a sliding ring, an engaging tooth sleeve and a stretching action cylinder used for driving the sliding ring to slide along the transmission shaft; the engaging tooth sleeve is provided with inner gear teeth which can be engaged with the friction disc gear teeth, the transition gear teeth and the resistance gear teeth; the engaging tooth sleeve can be embedded in the sliding ring and rotationally matched with the sliding ring, and the outer ring surface of the engaging tooth sleeve is frictionally matched with the inner ring surface of the sliding ring; the stretching action cylinder comprises a hydraulic piston rod and an action cylinder body, the working end of the hydraulic piston rod is connected with the sliding ring, and the two ends of the action cylinder body are respectively connected with hydraulic oil paths controlled by electromagnetic valves; when the hydraulic piston rod is stretched out, the sliding ring slides along the transmission shaft towards the wheel hub, so that the engaging tooth sleeve is simultaneously engaged with the friction disc gear teeth, the transition gear teeth and the resistance gear teeth; when the hydraulic piston rod is reset, the sliding ring slides along the transmission shaft away from the wheel hub, so that the engaging tooth sleeve is disengaged from the friction disc gear teeth and the transition gear teeth.

2. The brake device with a function of preventing heat fade according to claim 1, wherein The pressing disc comprises a supporting ring, a retaining ring and a fixing lug, the fixing lug is arranged on the inner side of the supporting ring; the disc surface of the friction gear disc is coaxially provided with a ring groove, the supporting ring is embedded in the ring groove, and the retaining ring is used for tightly pressing the transition gear disc on the friction gear disc; the fixing lug is used for mounting a locking bolt, and the disc surface of the friction gear disc is provided with a threaded hole corresponding to the fixing lug; a pressing spring is further arranged between the locking bolt and the fixing lug.

3. The brake device with a function of preventing heat fade according to claim 2, wherein The center of the friction gear disc is provided with a mounting hole used for connecting the transmission shaft with the wheel hub; and the fixed friction plate is provided with a ventilation hole.

4. The brake device with a function of preventing heat fade according to claim 3, wherein The friction assembly comprises a dynamic friction plate and a hydraulic structure for driving the dynamic friction plate to move towards the fixed friction plate, the hydraulic structure comprises a hydraulic cylinder shell fixed on the disc surface of the resistance disc, a hydraulic cylinder plug with a connecting nozzle is connected to the hydraulic cylinder shell, a hydraulic piston is arranged in the hydraulic cylinder shell, a compression piston is arranged in the compression cylinder shell, the compression piston has a flange for assembling a return spring, the working end of the compression piston is provided with the dynamic friction plate, and the end of the hydraulic piston abuts against the piston end of the compression piston.

5. The brake device with a function of preventing heat fade according to claim 4, wherein The resistance disc is sleeved on the transmission shaft through a bearing structure, and the resistance disc is rigidly connected with the suspension or kingpin of the motor vehicle.

6. The brake device with a function of preventing heat fade according to claim 5, wherein The stretching action cylinder is arranged circumferentially around the transmission shaft, and the action cylinder body is fixed on the annular support plate, at least two fixing holes are circumferentially arranged on the annular support plate, the fixing holes are used for fixing and assembling connecting bolts, the other ends of the connecting bolts are threadedly connected to the resistance disc, and threaded connection holes are arranged on the disc surface of the resistance disc corresponding to the connecting bolts.

7. The brake device with a function of preventing heat fade according to claim 6, wherein The sliding ring is provided with a sliding hole for the connecting bolt to pass through, and the sliding ring is further provided with a support inner ring for embedding the meshing tooth sleeve, correspondingly, the meshing tooth sleeve has an annular support table corresponding to the support inner ring, and the end surface of the sliding ring is closed by a threaded plug; the hydraulic piston rod is composed of a hydraulic piston body, a threaded rod and a threaded joint, and the sliding ring is provided with a threaded fixing hole corresponding to the threaded joint.

8. The mounting method of the brake device with the heat fade prevention function according to claim 7, characterized by, The method comprises the following steps: S1. Assembling the sliding ring and the meshing tooth sleeve, installing the stretching action cylinder on the annular support plate, connecting the hydraulic piston rod of the stretching action cylinder with the sliding ring, assembling the connecting bolt in the fixing hole of the annular support plate through the sliding hole, and completing the assembly of the control assembly; S2. Assembling the transition gear disc on the friction gear disc through the compression disc, adjusting the locking bolt to make the compression spring generate appropriate compression force, and completing the assembly of the brake disc assembly; S3. First, sleeving the control assembly on the transmission shaft, then sleeving the resistance disc on the transmission shaft through the bearing structure, rigidly connecting the resistance disc with the suspension or kingpin of the motor vehicle, then installing the other end of the connecting bolt on the resistance disc through the threaded connection hole, and completing the assembly of the resistance device and the control assembly; S4. Assembling the brake disc assembly between the hub and the transmission shaft through the mounting hole, and reserving appropriate gap between the fixed friction plate and the friction assembly assembled on the resistance disc.

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