Brake with hydraulic limiting function
Patent Information
- Application Number
- CN202522605655.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-12-09
AI Technical Summary
[0003]本实用新型的目的是解决干式制动器在重新注入液压油以取消制动状态时，需持续注入液压油直至内部油压大于弹性力，这个过程耗时较长，导致制动器无法快速取消制动，效率较低的问题
通过在注油部内设置调节杆、单向阀及限位弹簧等结构，借助调节杆内的通油槽与单向阀配合，实现了液压油注入时的油压快速蓄积，当油压达到预设值后可迅速推动单向阀打开，使液压油快速进入储油空间并推动活塞移动，同时调节杆在注油部的深度调节，进而通过限位弹簧调节单向阀的压力，使的整体油路之间的压力差更大，在内部进油时更迅速，有效解决了传统干式制动器取消制动时需持续注油、过程缓慢的问题，显著提升了制动器取消制动的响应速度，进而提高了设备的整体使用效率；
Smart Images
Figure CN224770736U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of brakes, and in particular to a brake with hydraulic limit function. Background Technology
[0002] Dry brakes are widely used in the travel and rotation systems of mining machinery, construction machinery and other fields. Their basic principle is to achieve normal closed braking through spring force and to release the brake by overcoming the elastic force through hydraulic oil pressure. In actual use, the hydraulic oil pressure of existing brakes needs to be continuously greater than the elastic force to be in a non-braking state. After the hydraulic oil is released, the elastic force drives the dynamic friction plate and the static friction plate of the brake to come into contact, so as to achieve braking. Afterwards, hydraulic oil needs to be re-injected into the brake through the oil injection hole to cancel the braking state. During the process of re-injecting hydraulic oil, hydraulic oil needs to be continuously injected until the internal oil pressure of the brake is greater than the elastic force. This process is relatively slow, which makes it impossible for the brake to quickly release the braking state. In actual operation, this affects the use and reduces efficiency. To solve the above problems, a brake with hydraulic limit function is proposed. Utility Model Content
[0003] The purpose of this invention is to solve the problem that when a dry brake needs to be re-injected with hydraulic oil to cancel the braking state, it is necessary to continuously inject hydraulic oil until the internal oil pressure is greater than the elastic force. This process takes a long time, resulting in the brake being unable to cancel the braking quickly and having low efficiency.
[0004] The present invention adopts the following technical solution: A brake with hydraulic limiting function is characterized in that it includes a brake body with an oil injection section and a piston and an elastic plate inside the brake body. There is an oil storage space between the piston and the brake body that cooperates with the elastic plate. An oil injection section is provided outside the oil storage space. An adjusting rod is provided inside the oil injection section. An oil inlet is provided on the side of the oil injection section. A one-way valve with a limiting spring is provided between the adjusting rod and the brake body. There is an oil passage groove inside the adjusting rod. The outlet of the oil passage groove fits the shape of the one-way valve to block the oil passage groove. There is a transverse opening in the middle of the adjusting rod to cooperate with the oil inlet and accumulate oil pressure in the oil passage groove. Furthermore, the adjusting rod is divided into upper and lower parts, and the two parts are connected by several connecting posts. The spaced connecting posts form a transverse opening for communication with the oil inlet. The oil passage groove is located in the upper part of the adjusting rod and passes through the middle transverse opening. There are sealing rings at the upper and lower ends of the transverse opening to prevent hydraulic oil leakage. Furthermore, the upper end face of the lower half of the adjusting rod is lower than the height of the oil inlet, which provides a margin for the adjustment of the adjusting rod. The lower end of the lower half of the adjusting rod is a threaded cylindrical structure with a cross-sectional radius larger than that of the upper end. There is a fastening spring between this structure and the oil filling part for fastening the adjusting rod. The lower end face of the lower half of the adjusting rod has a screw hole for screw adjustment, which is used to adjust the depth of the adjusting rod. Furthermore, the upper end of the one-way valve is a cylindrical structure for fitting a limiting spring, and the lower end is a hemispherical structure. The top of the oil passage groove has an arc-shaped structure that fits into the bottom of the one-way valve for sealing the oil passage groove. Furthermore, one end of the limiting spring abuts against the one-way valve, and the other end abuts against the inner wall of the oil filling part of the brake body, and the space where the one-way valve is located is connected to the oil storage space. Furthermore, the brake body is also provided with a number of staggered static friction plates and dynamic friction plates. The piston contacts the outermost static friction plate and dynamic friction plate to squeeze the static friction plate and dynamic friction plate. The end of the piston has an elastic plate, and the other end of the elastic plate abuts against the side wall of the brake body. There is a gap between the piston and the side wall of the brake body for the piston to move against the elastic force of the elastic plate. Furthermore, the brake body is also provided with a spline sleeve and a support shaft. The dynamic friction plate is fixedly mounted on the spline sleeve, and the spline sleeve is sleeved on the support shaft. The end of the support shaft is provided with a winch limiting box through a connecting shaft for depressurizing the brake body.
[0005] The beneficial effects of this utility model are: By incorporating an adjusting rod, a check valve, and a limit spring within the oil injection section, and utilizing the oil passage within the adjusting rod in conjunction with the check valve, rapid accumulation of hydraulic pressure during injection is achieved. Once the oil pressure reaches a preset value, the check valve opens rapidly, allowing hydraulic oil to quickly enter the storage space and move the piston. Simultaneously, the depth adjustment of the adjusting rod within the oil injection section, along with the pressure adjustment of the check valve via the limit spring, results in a greater pressure difference between the overall oil circuits, leading to faster internal oil intake. This effectively solves the problem of continuous oil injection and slow process in traditional dry brakes when canceling braking, significantly improving the response speed of brake cancellation and thus enhancing the overall efficiency of the equipment. The design of the upper and lower parts of the adjusting rod and the screw hole structure allow for flexible adjustment of the rod's depth, enabling precise setting of the initial threshold for oil pressure accumulation according to different working conditions and adjusting the time required for brake release. The sealing rings at the upper and lower ends of the transverse opening effectively prevent hydraulic oil leakage, ensuring the stability and reliability of oil pressure accumulation. The cooperation between the limit spring and the one-way valve enables automatic reset and sealing after brake release, ensuring stable recovery of the braking state. The cooperation between the spline sleeve and the support shaft ensures the stable operation of the dynamic friction plate, while the winch limit box enables convenient control of the pressure relief process, further improving the overall stability and reliability of the brake operation. Attached Figure Description
[0006] Figure 1 A schematic diagram of the overall structure of a brake with hydraulic limiting function according to a utility model; Figure 2 A utility model of a brake with hydraulic limit function Figure 1 A schematic diagram of the structure of A in the middle; Figure 3 This is a partial structural diagram of a brake with hydraulic limiting function according to a utility model. Figure 4 This is a schematic diagram of the structure of an existing brake in the background art; In the diagram: 1. Brake body; 2. Piston; 3. Elastic plate; 4. Oil filling part; 5. Adjusting rod; 6. Oil inlet; 7. One-way valve; 8. Limit spring; 9. Oil passage groove; 10. Connecting column; 11. Sealing ring; 12. Fastening spring; 13. Dynamic friction plate; 14. Static friction plate; 15. Spline sleeve; 16. Support shaft; 17. Winch limit box; 18. Oil storage space. Detailed Implementation
[0007] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0008] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0009] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0010] Example 1 This utility model provides a brake with hydraulic limiting function, including a brake body 1 with an oil injection section 4. A piston 2 and an elastic plate 3 are assembled inside the brake body 1. Several staggered static friction plates 14 and dynamic friction plates 13 are also installed inside the brake body 1. The piston 2 contacts the outermost static friction plates 14 and dynamic friction plates 13. The elastic plate 3 is installed at the end of the piston 2. Under the action of the elastic plate 3, the piston 2 compresses the static friction plates 14 and dynamic friction plates 13 to achieve braking. The other end of the elastic plate 3 abuts against... On the side wall of the brake body 1, a gap is reserved between the piston 2 and the side wall of the brake body 1. This gap provides space for the piston 2 to overcome the elastic force of the elastic plate 3 and move away from the static friction plate 14 and the dynamic friction plate 13 under the action of hydraulic oil. The brake body 1 is also equipped with a spline sleeve 15 and a support shaft 16. The dynamic friction plate 13 is fixedly installed on the spline sleeve 15. The spline sleeve 15 is sleeved on the support shaft 16. The end of the support shaft 16 is equipped with a winch limit box 17 through a connecting shaft for depressurizing the brake body 1. An oil storage space 18 is formed between the piston 2 and the brake body 1, which cooperates with the elastic plate 3. An oil filling part 4 is provided on the outside of the oil storage space 18. An adjusting rod 5 is installed in the oil filling part 4. An oil inlet 6 is opened on the side of the oil filling part 4. The oil inlet 6 is connected to an external oil source and can adjust the oil pressure. The adjusting rod 5 is cylindrical in shape. A one-way valve 7 is provided between the adjusting rod 5 and the brake body 1. A limit spring 8 is sleeved on the one-way valve 7. An oil passage groove 9 is machined inside the adjusting rod 5. The outlet shape of the oil passage groove 9 fits with the one-way valve 7 to achieve the sealing of the oil passage groove 9. A transverse opening is provided in the middle of the adjusting rod 5. The transverse opening is used to cooperate with the oil inlet 6 to accumulate oil pressure in the oil passage groove 9. The adjusting rod 5 is divided into upper and lower parts, which are fixedly connected by several connecting posts 10. The connecting posts 10 are spaced apart and form a transverse opening. This transverse opening is connected to the oil inlet 6. The oil passage groove 9 is opened in the upper part of the adjusting rod 5 and passes through the transverse opening in the middle. Sealing rings 11 are installed at both ends of the transverse opening to prevent hydraulic oil leakage. The height of the upper end face of the lower part of the adjusting rod 5 is lower than the height of the oil inlet 6, providing sufficient margin for the adjustment of the adjusting rod 5. The lower end of the lower part of the adjusting rod 5 is designed as a threaded cylindrical structure. The cross-sectional radius of the cylindrical structure is larger than that of the upper end. There is a gap between the threaded cylindrical structure and the oil filling part 4. A fastening spring 12 is installed in the gap. The adjusting rod 5 is adjusted in the oil filling part 4 through the threaded structure and fastened by the fastening spring 12. The lower end face of the lower part of the adjusting rod 5 is machined with a screw hole for screw adjustment. The depth of the adjusting rod 5 into the oil filling part 4 can be adjusted through the screw hole. The upper end of the one-way valve 7 is a cylindrical structure used to fit the limiting spring 8. The lower end of the one-way valve 7 is a hemispherical structure. The top of the oil passage groove 9 has an arc-shaped structure that fits into the hemispherical structure at the bottom of the one-way valve 7. The two fit together to seal the oil passage groove 9. One end of the limiting spring 8 abuts against the one-way valve 7, and the other end abuts against the inner wall of the oil filling part 4 of the brake body 1. The space where the one-way valve 7 is located is connected to the oil storage space 18.
[0011] Working principle: When in use, when the brake body 1 is in the braking state, the elastic force of the elastic plate 3 pushes the piston 2 to squeeze the static friction plate 14 and the dynamic friction plate 13, so that the two are tightly fitted to achieve normally closed braking. During this process, according to the magnitude of the elastic force of the elastic plate 3 on the piston 2, the corresponding oil pressure to overcome the force is judged, and the depth of the adjusting rod 5 in the oil filling part 4 is adjusted. At the same time, hydraulic oil is introduced into the oil filling part 4 through the oil inlet 6. The hydraulic oil enters the oil passage groove 9 through the transverse opening in the middle of the adjusting rod 5 and accumulates therein, so that the external oil pressure is slightly less than the elastic force of the limit spring 8, and the one-way valve 7 remains in contact with the oil passage groove 9. When it is necessary to cancel the brake, hydraulic oil is introduced into the oil inlet 6 again. At this time, the hydraulic pressure in the oil passage 9 is greater than the elastic force of the limit spring 8, and the one-way valve 7 separates from the oil passage 9. Under the action of the pressure difference, the hydraulic oil quickly enters the oil storage space 18 formed by the piston 2 and the brake body 1 along the space where the one-way valve 7 is located. The oil pressure in the oil storage space 18 increases and pushes the piston 2 to move against the elastic force of the elastic plate 3. The static friction plate 14 separates from the dynamic friction plate 13, and the brake is canceled. Adjusting the depth of the adjusting rod 5 can change the initial conditions for oil pressure accumulation in the oil passage 9, making the hydraulic oil entering the oil storage space 18 faster. When pressure relief is required, the pressure inside the brake body 1 is relieved through the winch limit box 17, the elastic plate 3 pushes the piston 2 to reset, and at the same time the one-way valve 7 is reset under the action of the limit spring 8, blocking the oil passage 9.
[0012] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A brake with hydraulic limit function, characterized in that, The brake body (1) includes an oil filling part (4) and a piston (2) and an elastic plate (3) inside the brake body (1). There is an oil storage space (18) between the piston (2) and the brake body (1) that cooperates with the elastic plate (3). An oil filling part (4) is provided outside the oil storage space (18). An adjusting rod (5) is provided inside the oil filling part (4). An oil inlet (6) is provided on the side of the oil filling part (4). A one-way valve (7) with a limit spring (8) is provided between the adjusting rod (5) and the brake body (1). There is an oil passage groove (9) inside the adjusting rod (5). The outlet of the oil passage groove (9) fits the shape of the one-way valve (7) to block the oil passage groove (9). There is a transverse opening in the middle of the adjusting rod (5) to cooperate with the oil inlet (6) and accumulate oil pressure in the oil passage groove (9).
2. A brake with hydraulic limiting function according to claim 1, characterized in that, The adjusting rod (5) is divided into upper and lower parts, and several connecting posts (10) connect the two parts. A transverse opening is formed between the spaced connecting posts (10) for communicating with the oil inlet (6). The oil passage groove (9) is located on the upper part of the adjusting rod (5) and passes through the middle transverse opening. There are sealing rings (11) at the upper and lower ends of the transverse opening to prevent hydraulic oil leakage.
3. A brake with hydraulic limiting function according to claim 2, characterized in that, The upper end face of the lower half of the adjusting rod (5) is lower than the height of the oil inlet (6) to provide a margin for the adjustment of the adjusting rod (5). The lower end of the lower half of the adjusting rod (5) is a threaded cylindrical structure with a cross-sectional radius larger than that of the upper end. There is a fastening spring (12) between the structure and the oil filling part (4) to fasten the adjusting rod (5). The lower end face of the lower half of the adjusting rod (5) has a screw hole for screw adjustment to adjust the depth of the adjusting rod (5).
4. A brake with hydraulic limiting function according to claim 3, characterized in that, The upper end of the one-way valve (7) is a cylindrical structure for connecting the limiting spring (8), and the lower end is a hemispherical structure. The top of the oil passage groove (9) has an arc-shaped structure that fits with the bottom of the one-way valve (7) for sealing the oil passage groove (9).
5. A brake with hydraulic limiting function according to claim 4, characterized in that, One end of the limiting spring (8) abuts against the one-way valve (7), and the other end abuts against the inner wall of the oil filling part (4) of the brake body (1). The space where the one-way valve (7) is located is connected to the oil storage space (18).
6. A brake with hydraulic limiting function according to claim 5, characterized in that, The brake body (1) is also provided with a number of staggered static friction plates (14) and dynamic friction plates (13). The piston (2) contacts the outermost static friction plate (14) and dynamic friction plate (13) to squeeze the static friction plate (14) and dynamic friction plate (13). The piston (2) has an elastic plate (3) at its end. The other end of the elastic plate (3) abuts against the side wall of the brake body (1). There is a gap between the piston (2) and the side wall of the brake body (1) for the piston (2) to move against the elastic force of the elastic plate (3).
7. A brake with hydraulic limiting function according to claim 6, characterized in that, The brake body (1) is also provided with a spline sleeve (15) and a support shaft (16). The dynamic friction plate (13) is fixedly installed on the spline sleeve (15). The spline sleeve (15) is sleeved on the support shaft (16). The end of the support shaft (16) is provided with a winch limiting box (17) through a connecting shaft for depressurizing the brake body (1).