Railway vehicle rotary lubricated sealed brake cylinder

Abstract

This invention relates to a rotary lubrication sealed brake cylinder for railway vehicles, belonging to the technical field of brake cylinders. It includes: a cylinder body, inside which a piston is disposed; a connecting block is fixed to the right end of the piston; a piston rod is rotatably connected to the right end of the connecting block; the piston rod passes through the front cover of the cylinder body; a rotating ring is rotatably connected to the side wall of the piston rod; a relief spring is fixed between the right end of the piston and the rotating ring; a lubrication block is fixed to the left side of the piston; a rotating block is fixed to the left side of the lubrication block; multiple blades are fixed to the side wall of the rotating block; storage cavities are formed inside both the lubrication block and the rotating block; a through hole is formed on the contact surface between the lubrication block and the rotating block; a diaphragm is fixed inside the through hole. By setting up the rotating block, blades, lubrication block, and one-way contact assembly, grease is circulated and supplied during braking, allowing it to be delivered to the upper part of the cylinder body without multiple braking actions, thus improving lubrication replenishment efficiency. By setting up scrapers, sealing blocks, and springs, grease is scraped and applied to the inner wall of the cylinder, and the grease supply is adjusted.

Description

Technical Field

[0001] This invention relates to the field of brake cylinder technology, and in particular to a rotary lubrication type sealed brake cylinder for railway vehicles. Background Technology

[0002] The brake cylinder of a railway vehicle is the core actuator of the braking system. It uses compressed air to drive a piston, achieving braking and releasing functions. During long-term use, the piston and the inner wall of the brake cylinder need to maintain good lubrication to ensure the sensitivity of piston movement and the service life of the seals. Traditional brake cylinders typically use pre-applied grease during assembly or regular grease replenishment. However, in actual operation, grease tends to gradually deposit at the bottom of the cylinder under gravity, leading to insufficient lubrication of the upper part and side walls of the cylinder, affecting the smoothness of piston movement and accelerating seal wear. Currently, some brake cylinders adopt a rotating structure, allowing the piston to rotate during braking, carrying up the grease deposited at the bottom and spreading it onto the inner wall of the cylinder.

[0003] However, existing rotary lubrication brake cylinders still have some shortcomings in use: on the one hand, the piston rotation can only passively carry up the deposited grease through physical contact. For grease that has been deposited at the bottom of the cylinder, the efficiency of its transfer to the upper part of the cylinder is low. Multiple braking operations are required to make the piston rotate once on the inner wall of the cylinder, resulting in slow lubrication replenishment. On the other hand, the grease is only transferred to the upper part by the rotation of the piston. The grease carried up gradually decreases as it rises, making it difficult to adjust the uniform application of grease to the inner wall of the cylinder. There is a situation where some areas are over-lubricated while other areas are still under-lubricated. Summary of the Invention

[0004] The purpose of this invention is to provide a rotary lubrication sealed brake cylinder for railway vehicles to solve the problems mentioned in the background. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A rotary lubrication sealed brake cylinder for railway vehicles includes: a cylinder body, a piston disposed inside the cylinder body, a connecting block fixed to the right end of the piston, a piston rod rotatably connected to the right end of the connecting block, the piston rod penetrating the front cover of the cylinder body, and a protrusion provided at the outer end of the piston rod to limit its sliding within the front cover of the cylinder body, a rotating ring rotatably connected to the side wall of the piston rod, a relief spring fixed between the right end of the piston and the rotating ring, a lubrication block fixed to the left side of the piston, a rotating block fixed to the left side of the lubrication block, and multiple... The blade has storage cavities inside both the lubrication block and the rotating block. A through hole is formed on the contact surface between the lubrication block and the rotating block, and a diaphragm is fixed inside the through hole. Multiple sliding grooves are formed on the side wall of the lubrication block. Each sliding groove is connected to a storage cavity of the lubrication block via a first one-way pipe, and two storage cavities are connected via a second one-way pipe. The storage cavity of the rotating block is connected to the inside of the cylinder via multiple third one-way pipes. A scraping assembly is provided inside each sliding groove, and a one-way contact assembly is provided between the diaphragm and the piston rod.

[0007] Optionally, a Y-shaped sealing ring and a guide ring are fixed in the groove of the piston sidewall, and the piston slides in a sealed manner with the inner wall of the cylinder through the Y-shaped sealing ring and the guide ring.

[0008] Optionally, the rotating block is designed as a frustum-shaped structure, and multiple blades are mounted in a circular array on the side inclined surface of the rotating block, with an arc-shaped cover fixed to the left end of the rotating block.

[0009] Optionally, the third one-way tube is inclined and fixed on the side slope of the rotating block and forms an angle with the inner wall of the cylinder, and multiple third one-way tubes are sequentially arranged in different blade intervals.

[0010] Optionally, the scraping assembly includes a scraper slidably connected in a groove, the scraper being connected to the side wall of the corresponding groove by a spring, and the scraper sliding against the inner wall of the cylinder.

[0011] Optionally, one end of the first one-way tube passes through the side wall of the lubricating block and extends into the groove. The first one-way tube is connected to the inner wall of the lubricating block by a limiting plate and a spring.

[0012] Optionally, the scraping assembly further includes a sealing block, which is fixed to the side wall of the scraper by a bracket, and the bottom of the sealing block is provided with a sealing groove corresponding to the first one-way tube.

[0013] Optionally, the one-way contact assembly includes a one-way geared disc and multiple abutments. The end face of the one-way geared disc is provided with a ring of helical teeth. The one-way geared disc is fixed to the outside of the piston rod. The multiple abutments are slidably connected to the piston and the connecting block. The left end of the abutment is fixedly connected to the diaphragm, and the right end of the abutment abuts against the one-way geared disc. The abutment is connected to the left end face of the piston by a limiting plate and a spring.

[0014] Optionally, the one-way toothed disc and the connecting block are both disposed in the inner ring of the relief spring, and the plurality of abutments are distributed in a circular array, and the plurality of abutments have the same degree of contact with the one-way toothed disc.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] In the above scheme, by setting up a rotating block, blades, a lubrication block, and a one-way contact assembly, the continuous one-way rotation of the piston and the automatic circulation supply of grease during braking are realized. During braking, the airflow entering the cylinder drives the blades to rotate the piston, initially applying the grease deposited at the bottom of the cylinder to the inner wall of the cylinder. At the same time, the push rod rotates with the piston and periodically contacts the fixed one-way gear plate, causing the diaphragm to reciprocate. This causes the storage chambers of the lubrication block and the rotating block to alternately generate negative pressure. The grease deposited at the bottom of the cylinder is then sucked in and sprayed onto the inner wall of the cylinder through the third one-way pipe, the second one-way pipe, and the first one-way pipe in sequence. This allows the deposited grease to be actively transported to the upper part of the cylinder without repeated braking, improving the lubrication replenishment efficiency.

[0017] In the above scheme, a scraper, a sealing block, and a spring are set up to scrape and apply grease to the inner wall of the cylinder and adjust the grease supply as needed. After the first one-way pipe sprays grease into the inner wall of the cylinder, the scraper, which rotates with the piston, spreads the grease evenly in the circumference. When too much grease accumulates in a certain place, the resistance of the scraper increases, it slides along the slide groove and compresses the spring, which drives the sealing block to move to align with the first one-way pipe and seal the first one-way pipe, thereby pausing the grease supply in that area and achieving uniform replenishment of grease to all parts of the inner wall of the cylinder. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the cylinder body of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall invention;

[0020] Figure 3 This is a schematic diagram showing the connection of the rotating block, lubrication block, piston, and one-way contact assembly of the present invention.

[0021] Figure 4 for Figure 3 Enlarged view of the structure of part A in the middle;

[0022] Figure 5 This is a schematic diagram showing the disassembled components of the rotating block, lubrication block, and piston part of the present invention.

[0023] Figure 6 This is an internal cross-sectional view of the rotating block and lubrication block of the present invention;

[0024] Figure 7 for Figure 6 Enlarged view of the structure of section B;

[0025] Figure 8 This is a schematic diagram of the scraping component of the present invention.

[0026] Reference numerals: 1. Cylinder block; 2. Piston; 3. Connecting block; 4. Plug rod; 5. Rotary ring; 6. Relief spring; 7. Lubricating block; 8. Rotating block; 9. Blade; 10. Storage chamber; 11. Arc-shaped cover; 12. Diaphragm; 13. Slide groove; 14. First one-way tube; 15. Second one-way tube; 16. Third one-way tube; 17. Scraping assembly; 171. Scraper; 172. Sealing block; 173. Sealing groove; 18. One-way contact assembly; 181. One-way gear plate; 182. Abutment rod; 19. Y-shaped sealing ring; 20. Guide ring. Detailed Implementation

[0027] To further illustrate the technical means and effects adopted by the present invention in order to achieve the intended purpose, the following detailed description is provided in conjunction with the accompanying drawings and preferred embodiments, based on the specific implementation methods, structures, features and effects of the present invention.

[0028] like Figures 1 to 8As shown, an embodiment of the present invention provides a rotary lubrication type sealed brake cylinder for railway vehicles, comprising: a cylinder body 1, a piston 2 disposed inside the cylinder body 1, a connecting block 3 fixed to the right end of the piston 2, a piston rod 4 rotatably connected to the right end of the connecting block 3, the piston rod 4 penetrating the front cover of the cylinder body 1, and a protrusion provided at the outer end of the piston rod 4 to limit the sliding of the piston rod 4 within the front cover of the cylinder body 1, the piston rod 4 can only slide along the axial direction of the cylinder body 1 without rotating, the piston 2 can also rotate relative to the piston rod 4 while sliding within the cylinder body 1, a rotating ring 5 rotatably connected to the side wall of the piston rod 4, and a release spring 6 fixed between the right end of the piston 2 and the rotating ring 5, during braking, the piston 2 moves to the right within the cylinder body 1 and releases the spring 6, during release, the release spring 6 pushes the piston. 2. Leftward reset: A lubricating block 7 is fixed to the left side of piston 2, and a rotating block 8 is fixed to the left side of lubricating block 7. Multiple blades 9 are fixed to the side wall of rotating block 8. Rotating block 8 and multiple blades 9 form an impeller mechanism. During braking, air enters from the left end of cylinder 1 to push piston 2. At the same time, the gas interacts with the blades 9 on rotating block 8 to generate a tangential force, causing rotating block 8 to drive lubricating block 7 and piston 2 to rotate together. Piston 2 rotates to spread the grease that has settled at the bottom of cylinder 1 to the side and top of cylinder 1. Both lubricating block 7 and rotating block 8 have storage cavities 10 inside. The contact surface between lubricating block 7 and rotating block 8 has a through hole, and a diaphragm 12 is fixed in the through hole. Multiple sliding grooves 13 are formed on the side wall of lubricating block 7. The groove 13 and the storage cavity 10 of the lubricating block 7 are both connected by a first one-way pipe 14. The two storage cavities 10 are connected by a second one-way pipe 15. The storage cavity 10 of the rotating block 8 is connected to the inside of the cylinder 1 by multiple third one-way pipes 16. The third one-way pipes 16 are used to draw some of the grease deposited at the bottom of the cylinder 1 into the storage cavity 10 inside the rotating block 8. The second one-way pipes 15 are used to draw the grease inside the rotating block 8 into the storage cavity 10 of the lubricating block 7. The first one-way pipes 14 are used to spray the grease in the lubricating block 7 onto the inner wall of the cylinder 1. The first one-way pipes 14 directly spray the grease onto the inner wall of the cylinder 1 at the corresponding position. The deposited grease can be discharged without multiple braking release processes. The grease can be directly applied to the upper part of the cylinder 1, improving the efficiency of lubrication replenishment. Each groove 13 is equipped with a scraping component 17, which is used to evenly apply the grease along the inner wall of the cylinder 1 in a circumferential direction. A one-way contact component 18 is provided between the diaphragm 12 and the piston rod 4. The one-way contact component 18 allows the rotating block 8 and its connected lubrication block 7 and piston 2 to rotate only in one direction. At the same time, the contact action of the one-way contact component 18 can push and pull the diaphragm 12 back and forth, so that the storage chamber 10 inside the lubrication block 7 and the storage chamber 10 inside the rotating block 8 alternately generate negative pressure. With the help of each one-way tube, the grease is circulated during braking, avoiding a large amount of grease depositing at the bottom of the cylinder 1, which would cause poor lubrication in other parts.

[0029] Specifically, when braking is required, compressed air enters from the left end of cylinder 1, pushing piston 2 to move to the right, while compressing the release spring 6. The airflow entering cylinder 1 interacts with multiple blades 9 on the side of rotating block 8 to generate tangential force, driving rotating block 8 to rotate together with lubricating block 7 and piston 2. As piston 2 slides to the right, it rotates, carrying up the grease deposited at the bottom of cylinder 1 and spreading it to the side wall and upper area of ​​cylinder 1.

[0030] Furthermore, during the rightward braking process of piston 2, multiple third one-way tubes 16, which are inclinedly arranged on the side slope of rotating block 8, are sequentially inserted into the grease deposited at the bottom of cylinder 1 as rotating block 8 rotates. Since the third one-way tubes 16 are inclined and located in the intervals between different blades 9, when rotating block 8 rotates, the openings of the third one-way tubes 16 continuously contact the deposited grease. At the same time, the one-way contact assembly 18 reciprocates to push the diaphragm 12. The reciprocating motion of the diaphragm 12 causes the storage chamber 10 inside lubricating block 7 and the storage chamber 10 inside rotating block 8 to alternately generate negative pressure. When the storage chamber 10 inside rotating block 8 generates negative pressure, the grease deposited at the bottom of cylinder 1 is drawn into the storage chamber 10 inside rotating block 8 through the third one-way tube 16. At the same time, the grease in lubricating block 7 is directly sprayed onto the corresponding position on the inner wall of cylinder 1 through the first one-way tube 14. When the storage chamber 10 inside lubricating block 7 generates negative pressure, the grease in rotating block 8 is drawn into lubricating block 7 through the second one-way tube 15.

[0031] A Y-shaped sealing ring 19 and a guide ring 20 are fixed in the groove on the side wall of piston 2. The outer diameter of the Y-shaped sealing ring 19 and the guide ring 20 is larger than the inner diameter of cylinder 1, thereby providing an initial clamping force. Piston 2 slides and seals against the inner wall of cylinder 1 through the Y-shaped sealing ring 19 and the guide ring 20. The opening of the Y-shaped sealing ring 19 faces to the left. When air enters from the left end of cylinder 1, the two lips of the Y-shaped sealing ring 19 are tightly attached to piston 2 and the inner wall of cylinder 1 respectively to achieve a seal. The guide ring 20 is used to support and guide piston 2.

[0032] The rotating block 8 is designed as a frustum-shaped structure with its cross-sectional diameter gradually increasing from left to right. Multiple blades 9 are arranged in a circular array on the side inclined surface of the rotating block 8. An arc-shaped cover 11 is fixed to the left end of the rotating block 8 to reduce gas resistance.

[0033] The third one-way tube 16 is fixed at an angle on the side slope of the rotating block 8 and forms an angle with the inner wall of the cylinder 1. Multiple third one-way tubes 16 are arranged in sequence in different intervals of the blades 9. When a lot of grease is deposited at the bottom of the cylinder 1, the third one-way tube 16 is inserted into the grease at an angle. When the cylinder is released, the rotating block 8 moves to the left with the piston 2, and the excess grease is squeezed into the third one-way tube 16 and then into the interior of the rotating block 8, so that the deposited grease is collected once during the release process.

[0034] The scraping assembly 17 includes a scraper 171 slidably connected in the groove 13. The scraper 171 and the corresponding side wall of the groove 13 are connected by springs. The scraper 171 slides against the inner wall of the cylinder 1. When a lot of grease accumulates in a certain place on the inner wall of the cylinder 1, the scraper 171 will experience increased resistance. At this time, the scraper 171 will slide along the groove 13 and compress the spring. When the first one-way tube 14 sprays grease directly onto the inner wall of the cylinder 1 at the corresponding position, the rotation of the lubrication block 7 drives the scraper 171 to rotate. The scraper 171 spreads the grease evenly along the circumference of the inner wall of the cylinder 1.

[0035] One end of the first one-way tube 14 passes through the side wall of the lubricating block 7 and extends into the groove 13. The first one-way tube 14 is connected to the inner wall of the lubricating block 7 by a limiting plate and a spring.

[0036] The scraping assembly 17 also includes a sealing block 172, which is fixed to the side wall of the scraper 171 by a bracket. The bottom of the sealing block 172 is provided with a sealing groove 173 corresponding to the first one-way tube 14.

[0037] Specifically, when the lubricating block 7 rotates, the scraper 171 set in the slide groove 13 keeps in contact with the inner wall of the cylinder 1 and slides. When the first one-way tube 14 sprays grease onto the inner wall of the cylinder 1, the scraper 171 rotates along with the rotation of the lubricating block 7, spreading the sprayed grease evenly along the circumference of the inner wall of the cylinder 1. If a lot of grease accumulates in a certain place on the inner wall of the cylinder 1, the resistance of the scraper 171 increases. At this time, the scraper 171 will slide along the slide groove 13 and compress the spring connected to it. When the sealing block 172 on the side wall of the scraper 171 contacts the first one-way tube 14, the first one-way tube 14 is squeezed and slides towards the lubricating block 7. When the sealing groove 173 at the bottom of the sealing block 172 is aligned with the first one-way tube 14, the first one-way tube 14 is completely blocked, so that grease will not be replenished in the place where there is a lot of grease accumulation.

[0038] The one-way contact assembly 18 includes a one-way gear disk 181 and multiple abutment rods 182. The end face of the one-way gear disk 181 is provided with a ring of helical teeth. The one-way gear disk 181 is fixed to the outside of the piston rod 4. The multiple abutment rods 182 are slidably connected to the piston 2 and the connecting block 3. The left end of the abutment rod 182 is fixedly connected to the diaphragm 12, and the right end of the abutment rod 182 abuts against the one-way gear disk 181. The abutment rod 182 is connected to the left end face of the piston 2 by a limiting plate and a spring. During braking, the one-way gear disk 181 is fixed to the piston rod 4 and will not rotate. The abutment rod 182 rotates with the piston 2 and abuts against the helical teeth of the one-way gear disk 181. Under the pressure of the inclined surface of the helical teeth, the abutment rod 182 moves back and forth, thereby causing the diaphragm 12 to bulge left and right continuously. When the piston 2 has a tendency to rotate in the opposite direction, the abutment rod 182 abuts against the vertical surface of the helical teeth, thereby preventing the piston 2 from reversing.

[0039] Both the one-way gear disc 181 and the connecting block 3 are located in the inner ring of the relief spring 6. Multiple abutment rods 182 are arranged in a circular array, and the multiple abutment rods 182 have the same degree of contact with the one-way gear disc 181, so that the diaphragm 12 protrudes stably on the left and right sides.

[0040] Specifically, during braking, compressed air pushes piston 2 to the right and rotates. Since the one-way gear 181 is fixed to the outside of the piston rod 4, and the piston rod 4 can only slide axially and cannot rotate, the one-way gear 181 remains stationary. Multiple abutment rods 182 are slidably connected to piston 2 and connecting block 3. Their left ends are fixedly connected to diaphragm 12, and their right ends abut against the end face of one-way gear 181 under the action of springs. When piston 2 rotates, the abutment rods 182 rotate with piston 2, and their right ends slide along a ring of helical teeth on the end face of one-way gear 181. Because the helical teeth have a unidirectional tilt angle, the push rod 182 periodically contacts the inclined surface of the helical teeth during rotation. Under the pressure of the inclined surface, it is forced to move to the left, overcoming the spring force and pushing the diaphragm 12 to bulge to the left. When the push rod 182 passes the highest point of the helical teeth, it returns to the right under the action of the spring, and the diaphragm 12 rebounds accordingly. It should be noted that the diaphragm 12 initially bulges to the right. Thus, during the continuous rotation of the piston 2, multiple push rods 182 move synchronously in a circular array, causing the diaphragm 12 to produce a stable left-right reciprocating bulging motion.

[0041] The working principle of the technical solution provided by this invention is as follows:

[0042] A certain amount of grease is pre-stored in the storage cavity 10 inside the lubricating block 7 and the rotating block 8. The diaphragm 12 bulges to the right in the initial state. When braking, compressed air enters from the left end of the cylinder 1. The airflow first interacts with multiple blades 9 on the side of the rotating block 8 to generate a tangential driving force, causing the rotating block 8 to drive the lubricating block 7 and the piston 2 to rotate. At the same time, the compressed air pushes the piston 2 to overcome the elastic force of the relief spring 6 and slide to the right. The rotational motion of the piston 2 during the rightward sliding process carries the grease deposited at the bottom of the cylinder 1 through rotation and initially coats it onto the side wall and upper area of ​​the cylinder 1.

[0043] During the rightward braking process of piston 2, piston rod 4 can only slide axially and cannot rotate. The one-way gear disk 181 fixed on it will not rotate. However, the rotation of piston 2 will drive multiple abutment rods 182 arranged in a circular array to rotate synchronously. The right end of abutment rod 182 is always in contact with the helical teeth on the end face of the one-way gear disk 181 under the action of the spring. When abutment rod 182 slides along the inclined surface of the helical teeth, it is forced to move to the left under the pressure of the inclined surface, overcoming the spring force and pushing diaphragm 12 to bulge to the left. When abutment rod 182 passes the highest point of the helical teeth, it returns to the right under the action of the spring, and diaphragm 12 rebounds to the right. During the continuous rotation of piston 2, multiple abutment rods 182 move back and forth synchronously, causing diaphragm 12 to produce a stable left-right reciprocating bulging motion. The reciprocating motion of diaphragm 12 causes the lubricating block 7 to... The storage chamber 10 of the cylinder 1 and the storage chamber 10 inside the rotating block 8 alternately change in volume, thereby alternately generating negative pressure. When the diaphragm 12 bulges to the left, the volume of the storage chamber 10 of the lubricating block 7 increases and generates negative pressure. At this time, the second one-way tube 15 opens and draws the grease in the storage chamber 10 of the rotating block 8 into the lubricating block 7. When the diaphragm 12 rebounds to the right, the volume of the storage chamber 10 of the rotating block 8 increases and generates negative pressure. At this time, the third one-way tube 16 opens and draws the grease deposited at the bottom of the cylinder 1 into the rotating block 8. At the same time, the volume of the storage chamber 10 of the lubricating block 7 decreases and the internal pressure increases. The first one-way tube 14 opens and sprays the grease onto the corresponding position on the inner wall of the cylinder 1, improving the grease replenishment efficiency and avoiding insufficient lubrication of the upper part of the cylinder 1 due to relying solely on the piston 2 to drive the grease. After the grease is sprayed, as the lubricating block 7 continues to rotate, the scraper 171 in the groove 13 always slides against the inner wall of the cylinder 1, spreading the freshly sprayed grease evenly along the circumference of the inner wall of the cylinder 1. If a lot of grease accumulates in a certain part of the inner wall of the cylinder 1, the resistance of the scraper 171 increases, and it will slide along the groove 13 and compress the spring connected to it. When the sealing block 172 on the side wall of the scraper 171 moves to contact the first one-way tube 14, the first one-way tube 14 is squeezed and slides into the lubricating block 7. When the sealing groove 173 at the bottom of the sealing block 172 is aligned with the first one-way tube 14, the first one-way tube 14 is completely sealed, thereby stopping the supplementary spraying in the area where the grease is sufficient, realizing lubrication on demand. When the scraper 171 passes over the grease accumulation area, the resistance decreases, and the scraper 171 returns to its original position under the action of the spring. The sealing block 172 disengages from the first one-way tube 14, and the first one-way tube 14 returns to its original position under the action of its own spring, restoring the spraying function.

[0044] When braking ends and release is needed, the release spring 6 releases its elastic force, pushing the piston 2 to slide to the left to reset. During this process, the rotating block 8 moves to the left with the piston 2. The inclined third one-way tube 16 squeezes excess grease into the tube during the movement, and then it is sucked into the storage cavity 10 of the rotating block 8, completing one collection of deposited grease. When the piston 2 has a tendency to rotate in the opposite direction, the push rod 182 abuts against the vertical surface of the helical teeth of the one-way toothed disc 181, preventing the piston 2 from rotating in the opposite direction.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A rotary lubricated sealed brake cylinder for a railway vehicle, characterized in that, include: A cylinder body (1) is provided with a piston (2) inside the cylinder body (1). A connecting block (3) is fixed to the right end of the piston (2). A piston rod (4) is rotatably connected to the right end of the connecting block (3). The piston rod (4) passes through the front cover of the cylinder body (1). A protrusion is provided on the outer end of the piston rod (4) to limit the sliding of the piston rod (4) within the front cover of the cylinder body (1). A rotating ring (5) is rotatably connected to the side wall of the piston rod (4). A relief spring (6) is fixed between the right end of the piston (2) and the rotating ring (5). A lubricating block (7) is fixed to the left side of the piston (2). A rotating block (8) is fixed to the left side of the lubricating block (7). Multiple blades (9) are fixed on the side wall. Storage cavities (10) are opened inside both the lubrication block (7) and the rotating block (8). Through holes are opened on the contact surfaces of the lubrication block (7) and the rotating block (8). A diaphragm (12) is fixed inside the through holes. Multiple sliding grooves (13) are opened on the side wall of the lubrication block (7). Each sliding groove (13) is connected to the storage cavity (10) of the lubrication block (7) through a first one-way pipe (14). Two storage cavities (10) are connected through a second one-way pipe (15). The storage cavity (10) of the rotating block (8) is connected to the inside of the cylinder (1) through multiple third one-way pipes (16). Each of the grooves (13) is provided with a scraping component (17), and a one-way contact component (18) is provided between the diaphragm (12) and the plug rod (4). The one-way contact assembly (18) includes a one-way toothed disc (181) and multiple abutments (182). The end face of the one-way toothed disc (181) is provided with a ring of helical teeth. The one-way toothed disc (181) is fixed to the outside of the piston rod (4). The multiple abutments (182) are slidably connected to the piston (2) and the connecting block (3). The left end of the abutment (182) is fixedly connected to the diaphragm (12). The right end of the abutment (182) abuts against the one-way toothed disc (181). The abutment (182) is connected to the left end face of the piston (2) by a limiting plate and a spring.

2. A rotary lubricated sealed brake cylinder for a railway vehicle as defined in claim 1, characterized in that The piston (2) has a Y-shaped sealing ring (19) and a guide ring (20) fixed in the groove on its side wall. The piston (2) slides in a sealed manner with the inner wall of the cylinder (1) through the Y-shaped sealing ring (19) and the guide ring (20).

3. A rotary lubricated sealed brake cylinder for a railway vehicle as defined in claim 1, wherein The rotating block (8) is designed as a frustum structure, and multiple blades (9) are arranged in a circular array on the side inclined surface of the rotating block (8). An arc-shaped cover (11) is fixed to the left end of the rotating block (8).

4. A rotary lubricated sealed brake cylinder for a railway vehicle as defined in claim 3, wherein The third one-way tube (16) is fixed at an angle on the side slope of the rotating block (8) and forms an angle with the inner wall of the cylinder (1). Multiple third one-way tubes (16) are arranged in different blade (9) intervals.

5. A rotary lubricated sealed brake cylinder for a railway vehicle as defined in claim 1, wherein The scraping assembly (17) includes a scraper (171) slidably connected in the groove (13). The scraper (171) and the side wall of the corresponding groove (13) are connected by springs. The scraper (171) slides against the inner wall of the cylinder (1).

6. A rotary lubricated sealed brake cylinder for a railway vehicle as defined in claim 1, wherein One end of the first one-way tube (14) passes through the side wall of the lubricating block (7) and extends into the groove (13). The first one-way tube (14) and the inner wall of the lubricating block (7) are connected by a limiting piece and a spring.

7. A rotary lubricated sealed brake cylinder for a railway vehicle as defined in claim 5 wherein, The scraping assembly (17) also includes a sealing block (172), which is fixed to the side wall of the scraper (171) by a bracket. The bottom of the sealing block (172) is provided with a sealing groove (173) corresponding to the first one-way tube (14).

8. A rotary lubricated sealed brake cylinder for a railway vehicle as defined in claim 1, wherein The one-way toothed disc (181) and the connecting block (3) are both located in the inner ring of the relief spring (6). The multiple abutments (182) are arranged in a circular array, and the multiple abutments (182) have the same degree of contact with the one-way toothed disc (181).

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