Safety hydraulic oil cylinder for hydraulic disc brake

Abstract

The safety hydraulic oil cylinder for the hydraulic disc brake comprises a hydraulic oil cylinder body, a piston rod used for supporting is arranged in the hydraulic oil cylinder body, a sealing mechanism is arranged between the piston rod and the hydraulic oil cylinder body, and the sealing mechanism comprises a mounting plate mounted at the top end of the hydraulic oil cylinder body; a sealing piece used for sealing the piston rod is arranged between the piston rod and the mounting plate, an annular groove used for relieving stress is formed in the outer surface of the sealing piece, and a plurality of air holes used for exhausting are formed in the annular groove. According to the hydraulic oil cylinder, the stress borne by the sealing element in the installation and use process can be effectively relieved, meanwhile, dynamic pressurization is conducted on the sealing element through flowing of hydraulic oil in the hydraulic oil cylinder, the mechanism can automatically adjust the sealing pressure along with the working state of the hydraulic oil cylinder, and it is guaranteed that the good sealing effect can be kept under any working condition.

Description

Technical Field

[0001] The invention relates to a hydraulic cylinder, in particular to a safety hydraulic cylinder for hydraulic disc brakes. Background Art

[0002] In the hydraulic transmission system, the safety hydraulic cylinder of the hydraulic disc brake plays a vital role. It not only provides stable braking force, but also ensures the safety and reliability of the entire hydraulic system.

[0003] The piston rod and the cylinder body of a traditional hydraulic cylinder are usually sealed by a rubber gasket or an O-ring. However, during long-term use, due to the pressure of the hydraulic oil and the frequent movement of the piston rod, the rubber gasket or O-ring is easily worn due to greater stress and friction, resulting in a decrease in the sealing effect and causing hydraulic oil leakage. This will not only affect the normal operation of the hydraulic cylinder, but may also damage other components of the hydraulic system, reducing the reliability and safety of the entire system. Summary of the invention

[0004] The purpose of the present invention is to provide a safe hydraulic cylinder for hydraulic disc brakes to solve the problem raised in the above background technology that due to the pressure of the hydraulic oil and the frequent movement of the piston rod, the rubber gasket or O-ring is easily worn due to greater stress and friction, resulting in a decrease in the sealing effect and causing hydraulic oil leakage.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a safety hydraulic cylinder for hydraulic disc brakes, comprising a hydraulic cylinder body, a piston rod for supporting function is arranged inside the hydraulic cylinder body, a sealing mechanism is arranged between the piston rod and the hydraulic cylinder body, the sealing mechanism comprises a mounting plate installed at the top end of the hydraulic cylinder body, a sealing member for sealing the piston rod is arranged between the piston rod and the mounting plate, an annular groove for relieving stress is provided on the outer surface of the sealing member, a plurality of air holes for exhaust are provided inside the annular groove, a pressurizing assembly is provided inside the mounting plate, the pressurizing assembly comprises a telescopic cylinder installed inside the mounting plate, a telescopic rod is slidably penetrated through the free end of the telescopic cylinder, a pressure plate for applying pressure to the seal is installed at one end of the telescopic rod, and a through groove for providing hydraulic oil flow is provided between the telescopic cylinder and the inner cavity of the hydraulic cylinder body.

[0006] As a preferred technical solution of the present invention, a liquid-passing assembly is arranged on the mounting plate near the interior of the telescopic cylinder, and the liquid-passing assembly includes a baffle arranged at one end of the telescopic cylinder, a first spring is fixedly installed between the baffle and the mounting plate, a fixed liquid groove is provided on the surface of the mounting plate near the through groove, a rotating plate is rotatably installed on the surface of the mounting plate near the baffle, one end of the rotating plate is connected to the baffle by a connecting rope, and the free end of the rotating plate rotates inside the fixed liquid groove.

[0007] As a preferred technical solution of the present invention, a collecting pipe is installed inside the mounting plate near the fixed liquid tank, an exhaust pipe is installed between the collecting pipe and the fixed liquid tank, an exhaust groove connected to the outside is opened inside the mounting plate, and one end of the collecting pipe is connected to the exhaust groove.

[0008] As a preferred technical solution of the present invention, a top plate is installed at the free end of the hydraulic cylinder body, the mounting plate is arranged between the top plate and the hydraulic cylinder body, and a first rubber ring is arranged between the mounting plate and the hydraulic cylinder body.

[0009] As a preferred technical solution of the present invention, a lubrication assembly is provided inside the mounting plate, and the lubrication assembly includes a second rubber ring installed on the inner wall of the mounting plate, a support ring is fixedly installed between the seal and the second rubber ring, and a roller is rotatably installed on the outer surface of the support ring, and the roller slides on the outer surface of the piston rod.

[0010] As a preferred technical solution of the present invention, a movable mechanism is arranged inside the hydraulic cylinder body, and the movable mechanism includes a piston plate slidably installed in the inner cavity of the hydraulic cylinder body, the piston rod is fixedly installed on the surface of the piston plate, the outer surface of the piston plate is provided with a groove, and a triangular washer is installed inside the groove.

[0011] As a preferred technical solution of the present invention, a pressure-resistant mechanism is provided at the bottom end of the hydraulic cylinder body, and the pressure-resistant mechanism includes a base filled with hydraulic oil and fixedly installed at the bottom end of the hydraulic cylinder body, a movable plate is slidably installed inside the base, a plurality of liquid outlet holes are opened on the surface of the movable plate, a first positive magnetic block is fixedly installed on the surface of the piston plate close to the movable plate, and a second positive magnetic block is fixedly installed on the top of the movable plate.

[0012] As a preferred technical solution of the present invention, a buffer assembly is arranged inside the pressure-resistant mechanism, and the buffer assembly includes a cylinder fixedly mounted on the bottom end of the hydraulic cylinder body, a sliding rod is slidably passed through one end of the cylinder close to the piston plate, and a second spring is fixedly mounted between one end of the sliding rod located inside the cylinder and the cylinder.

[0013] As a preferred technical solution of the present invention, a connecting pipe is installed between the plurality of cylinders, a plurality of air bags are provided on the inner bottom wall of the base, and an air guide tube is installed between the air bags and the connecting pipe.

[0014] As a preferred technical solution of the present invention, the outer surface of the hydraulic cylinder body is connected to a liquid inlet pipe and a liquid outlet pipe, the outer surfaces of the liquid inlet pipe and the liquid outlet pipe are both provided with a one-way valve, and the liquid inlet pipe and the liquid outlet pipe are respectively located at both ends of the movable mechanism.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can effectively relieve the stress on the seal during installation and use by providing grooves and air holes on the outer surface of the seal, thereby extending its service life. This design not only improves the durability of the seal, but also significantly enhances the sealing effect between the piston rod and the hydraulic cylinder, prevents leakage of hydraulic oil, and ensures the stability and safety of the hydraulic system.

[0016] 2. The present invention drives the telescopic rod and the pressure plate through the flow of hydraulic oil inside the hydraulic cylinder to dynamically pressurize the seal. This mechanism can automatically adjust the sealing pressure according to the working state of the hydraulic cylinder to ensure that a good sealing effect can be maintained under any working conditions, further improving the reliability and stability of the equipment.

[0017] 3. The present invention opens a groove on the outer surface of the piston plate and installs a triangular gasket, which not only increases the contact area between the piston plate and the inner wall of the hydraulic cylinder, but also improves the stability of the piston plate through the stability principle of the triangle. At the same time, the presence of the triangular gasket also enhances the sealing effect and reduces the risk of hydraulic oil leakage.

[0018] 4. The present invention installs a base and a movable plate at the bottom end of the hydraulic cylinder, and utilizes the principle of magnetic blocks with like poles repelling each other. At the same time, the movable plate with through holes is pressed downward in the hydraulic oil. The flow therein causes the liquid to exert a reaction force on the slide plate, thereby playing a buffering role, which not only reduces the impact and vibration of the piston rod during the movement, but also achieves a buffering effect on the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the hydraulic cylinder body of the present invention; Figure 3 It is a schematic diagram of the internal structure of the mounting plate of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the structure at A in FIG. Figure 5It is a schematic diagram of the sealing plate structure of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the structure at B in FIG. Figure 7 It is a schematic diagram of the pressing plate structure of the present invention; Figure 8 It is a schematic diagram of the internal structure of the base of the present invention; Fig. 9 It is a schematic diagram of the piston plate structure of the present invention; Fig.10 It is a schematic diagram of the cross-sectional structure of the piston plate of the present invention.

[0020] In the figure: 1, hydraulic cylinder body; 2, liquid inlet pipe; 3, liquid outlet pipe; 4, piston rod; 5, movable mechanism; 51, piston plate; 52, groove; 53, triangular gasket; 6, top plate; 7, sealing mechanism; 71, mounting plate; 72, first rubber ring; 73, sealing member; 74, pressurizing assembly; 741, telescopic cylinder; 742, telescopic rod; 743, pressing plate; 744, through groove; 75, liquid passing assembly; 751, baffle; 752, first spring; 753, fixed liquid tank; 7 54. Rotating plate; 755. Collecting pipe; 756. Exhaust pipe; 757. Exhaust groove; 76. Lubrication assembly; 761. Second rubber ring; 762. Support ring; 763. Roller; 8. Pressure-resistant mechanism; 81. First positive magnetic block; 82. Second positive magnetic block; 83. Liquid outlet; 84. Moving plate; 85. Buffer assembly; 851. Sliding rod; 852. Cylinder; 853. Second spring; 854. Connecting pipe; 855. Air bag; 856. Air guide pipe; 86. Base. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-10 The present invention provides a safety hydraulic cylinder for a hydraulic disc brake, comprising a hydraulic cylinder body 1, a piston rod 4 for supporting is arranged inside the hydraulic cylinder body 1, a sealing mechanism 7 is arranged between the piston rod 4 and the hydraulic cylinder body 1, the sealing mechanism 7 comprises a mounting plate 71 mounted on the top of the hydraulic cylinder body 1, a sealing member 73 for sealing the piston rod 4 is arranged between the piston rod 4 and the mounting plate 71, an annular groove for relieving stress is provided on the outer surface of the sealing member 73, and a plurality of air holes for exhaust are provided inside the annular groove.

[0023] Among them, by setting the seal 73 and the annular groove, the hydraulic cylinder can tightly seal the piston rod 4 to prevent leakage of hydraulic oil, which ensures that the hydraulic cylinder can still maintain good sealing performance under high pressure, thereby improving the stability and reliability of the entire hydraulic system; the design of the annular groove relieves the stress on the seal 73 and reduces the risk of damage due to stress concentration, thereby extending the service life of the seal 73, reducing the replacement frequency, and thus reducing maintenance costs; by opening air holes to discharge the gas inside the hydraulic cylinder, a stable pressure inside the system can be maintained, thereby reducing the vibration and noise caused by gas impact and improving the operating stability of the entire hydraulic system.

[0024] In the technical solution of the embodiment of the present application, a pressurizing assembly 74 is arranged inside the mounting plate 71, and the pressurizing assembly 74 includes a telescopic cylinder 741 installed inside the mounting plate 71, and a telescopic rod 742 is slidably passed through the free end of the telescopic cylinder 741, and a pressure plate 743 for applying pressure to the seal 73 is installed at one end of the telescopic rod 742, and a through groove 744 for providing hydraulic oil flow is opened between the telescopic cylinder 741 and the inner cavity of the hydraulic cylinder body 1.

[0025] Among them, when the hydraulic cylinder body 1 is in use, a part of the hydraulic oil will be compressed into the telescopic tube 741, and the telescopic rod 742 and the pressure plate 743 will be driven by the flow of hydraulic oil inside the hydraulic cylinder to dynamically pressurize the seal 73. This mechanism can automatically adjust the sealing pressure according to the working state of the hydraulic cylinder, ensuring that a good sealing effect can be maintained under any working conditions, further improving the reliability and stability of the equipment.

[0026] In other embodiments, a liquid flow assembly 75 is provided inside the mounting plate 71 near the telescopic cylinder 741, and the liquid flow assembly 75 includes a baffle 751 arranged at one end of the telescopic cylinder 741, a first spring 752 is fixedly installed between the baffle 751 and the mounting plate 71, a fixed liquid groove 753 is provided on the surface of the mounting plate 71 near the through groove 744, and a rotating plate 754 is rotatably installed on the surface of the mounting plate 71 near the baffle 751, one end of the rotating plate 754 is connected to the baffle 751 by a connecting rope, and the free end of the rotating plate 754 rotates inside the fixed liquid groove 753.

[0027] Among them, when the hydraulic cylinder body 1 is in use, the hydraulic oil therein will be synchronously introduced into the fixed liquid tank 753, thereby pushing the rotating plate 754 to rotate, and the rotating plate 754 will drive the baffle 751 to move, so that the multiple telescopic cylinders 741 inside the mounting plate 71 can be opened synchronously. At this time, the flow rate and capacity of the liquid entering the telescopic cylinder 741 are the same, so that the pressure plate 743 applies the same pressure to the seal 73, thereby improving the tightness and uniformity of various parts of the seal 73, and further improving the sealing effect.

[0028] In other embodiments, a collecting pipe 755 is installed inside the mounting plate 71 near the fixed liquid tank 753, an exhaust pipe 756 is installed between the collecting pipe 755 and the fixed liquid tank 753, an exhaust groove 757 connected to the outside is opened inside the mounting plate 71, and one end of the collecting pipe 755 is connected to the exhaust groove 757.

[0029] Among them, when the rotating plate 754 rotates, the air inside the fixed liquid tank 753 will be discharged to the inside of the exhaust groove 757, so as to avoid excessive pressure inside the fixed liquid tank 753 and affect the rotation of the rotating plate 754. At the same time, after exhausting, no external force enters. At this time, the stability of the rotating plate 754 after rotation can be guaranteed, and the rotating plate 754 can be prevented from resetting immediately after rotation, thereby affecting the internal feeding of the telescopic cylinder 741 and causing uneven pressure.

[0030] In other embodiments, a top plate 6 is installed at the free end of the hydraulic cylinder body 1 , a mounting plate 71 is disposed between the top plate 6 and the hydraulic cylinder body 1 , and a first rubber ring 72 is disposed between the mounting plate 71 and the hydraulic cylinder body 1 .

[0031] Among them, the mounting plate 71 can be fixed by the top plate 6, and it is also convenient to replace and use the mounting plate 71 and the internal parts of the mounting plate 71; the first rubber ring 72 can prevent the hydraulic oil from leaking and ensure the sealing between the mounting plate 71 and the hydraulic cylinder body 1.

[0032] In other embodiments, a lubrication assembly 76 is provided inside the mounting plate 71, and the lubrication assembly 76 includes a second rubber ring 761 installed on the inner wall of the mounting plate 71, and a support ring 762 is fixedly installed between the seal 73 and the second rubber ring 761, and a roller 763 is rotatably installed on the outer surface of the support ring 762, and the roller 763 slides on the outer surface of the piston rod 4.

[0033] Among them, by providing a roller 763, when the seal 73 is in close contact with the piston rod 4, the roller 763 can support and assist the movement of the piston rod 4, thereby preventing the piston rod 4 and the seal 73 from being too tight, causing excessive resistance when the hydraulic cylinder body 1 is used, and affecting the telescopic use of the hydraulic cylinder body 1.

[0034] In other embodiments, a movable mechanism 5 is provided inside the hydraulic cylinder body 1, and the movable mechanism 5 includes a piston plate 51 slidably installed in the inner cavity of the hydraulic cylinder body 1, and the piston rod 4 is fixedly installed on the surface of the piston plate 51. A groove 52 is opened on the outer surface of the piston plate 51, and a triangular washer 53 is installed inside the groove 52.

[0035] Among them, a groove 52 is opened on the outer surface of the piston plate 51 and a triangular gasket 53 is installed, which not only increases the contact area between the piston plate 51 and the inner wall of the hydraulic cylinder, but also improves the stability of the piston plate 51 through the stability principle of the triangle. At the same time, the presence of the triangular gasket 53 also enhances the sealing effect and reduces the risk of hydraulic oil leakage.

[0036] In other embodiments, a pressure-resistant mechanism 8 is provided at the bottom end of the hydraulic cylinder body 1, and the pressure-resistant mechanism 8 includes a base 86 filled with hydraulic oil and fixedly installed at the bottom end of the hydraulic cylinder body 1, a movable plate 84 is slidably installed inside the base 86, and a plurality of liquid outlet holes 83 are opened on the surface of the movable plate 84, a first positive magnetic block 81 is fixedly installed on the surface of the piston plate 51 close to the movable plate 84, and a second positive magnetic block 82 is fixedly installed on the top of the movable plate 84.

[0037] Among them, the principle of magnetic blocks with like poles repelling each other is utilized, and at the same time, a movable plate 84 with a through hole is pressed downward in the liquid oil. The flow therein will cause the liquid to exert a reaction force on the movable plate 84. This reaction force is opposite to the moving direction of the movable plate 84, thereby playing a buffering role. This design not only reduces the impact and vibration of the piston rod 4 during the movement, achieves a buffering effect on the piston rod 4, but also improves the overall stability and service life of the equipment.

[0038] In other embodiments, a buffer assembly 85 is provided inside the pressure-resistant mechanism 8, and the buffer assembly 85 includes a cylinder 852 fixedly mounted on the bottom end of the hydraulic cylinder body 1, and a slide rod 851 slides through one end of the cylinder 852 close to the piston plate 51, and a second spring 853 is fixedly mounted between one end of the slide rod 851 located inside the cylinder 852 and the cylinder 852.

[0039] Among them, when the piston plate 51 moves, the elastic force of the second spring 853 enables the piston plate 51 to move smoothly during the operation of the hydraulic cylinder body 1. The rapid movement of the piston plate 51 may generate a large impact force, and the elastic force of the second spring 853 can absorb and disperse this part of the impact force, so that the piston plate 51 is more stable during the movement, thereby reducing the impact on the hydraulic cylinder body 1 and other mechanical parts, and helping to protect the stability and safety of the entire mechanical system; in some cases, when the hydraulic cylinder body 1 loses the effect of the hydraulic oil, the piston plate 51 needs to return to its original position, and the second spring 853 can provide the necessary elastic force to help the piston plate 51 smoothly return to its initial state, thereby ensuring the normal operation of the mechanical system.

[0040] In other embodiments, a connecting tube 854 is installed between the multiple cylinders 852 , a multiple airbags 855 are provided on the inner bottom wall of the base 86 , and an air guide tube 856 is installed between the airbags 855 and the connecting tube 854 .

[0041] When the piston plate 51 is pressed down, the slide rod 851 will compress the inside of the cylinder 852, thereby leading out the airflow in the cylinder 852, and filling the gas into the airbag 855 through the air duct 856, so that the airbag 855 inside the base 86 is inflated and expanded. At this time, the expanded airbag 855 can further cushion the movement of the piston rod 4, thereby improving the stability of the movement of the piston rod 4.

[0042] In other embodiments, the outer surface of the hydraulic cylinder body 1 is connected to a liquid inlet pipe 2 and a liquid outlet pipe 3, and the outer surfaces of the liquid inlet pipe 2 and the liquid outlet pipe 3 are both provided with a one-way valve, and the liquid inlet pipe 2 and the liquid outlet pipe 3 are respectively located at the two ends of the movable mechanism 5.

[0043] Among them, the liquid inlet pipe 2 is responsible for introducing high-pressure oil into the inner cavity of the hydraulic cylinder body 1, and the setting of the one-way valve ensures that the oil can only flow into the hydraulic cylinder body 1 from the liquid inlet pipe 2, and cannot flow out in the opposite direction; the liquid outlet pipe 3 is responsible for discharging the low-pressure oil in the inner cavity of the hydraulic cylinder body 1. Similarly, the setting of the one-way valve ensures that the oil can only flow out from the inner cavity of the hydraulic cylinder body 1 through the liquid outlet pipe 3, and cannot flow in in the opposite direction, which helps to maintain the pressure balance in the inner cavity of the hydraulic cylinder body 1 and ensures that the piston plate 51 will not be subject to unnecessary resistance during movement, which ensures that the hydraulic cylinder body 1 can obtain a stable supply of oil when pushing the piston plate 51 to move.

[0044] The working principle is: When the hydraulic cylinder body 1 is in use, high-pressure oil is introduced into one side of the piston plate 51 in the inner cavity of the hydraulic cylinder body 1 through the liquid inlet pipe 2, and the hydraulic oil on one side of the piston plate 51 of the hydraulic cylinder body 1 is discharged from the liquid outlet pipe 3 at the same time, so as to form a liquid balance inside the hydraulic cylinder body 1, thereby pushing the piston plate 51 to move inside the hydraulic cylinder body 1, and the movement of the piston plate 51 will drive the piston rod 4 to move, thereby realizing the operation of the hydraulic cylinder body 1. At this time, when the hydraulic cylinder body 1 is in operation, part of the hydraulic oil will be introduced into the interior of the telescopic cylinder 741 through the through groove 744, so that the interior of the telescopic cylinder 741 is pressurized, thereby pushing the pressure plate 741. 43 moves, and the seal 73 on the surface of the piston rod 4 is dynamically pressurized through the pressure plate 743, which can automatically adjust the sealing pressure according to the working state of the hydraulic cylinder to ensure that a good sealing effect can be maintained under any working conditions. Furthermore, by arranging a movable plate 84 with holes and an air bag 855 inside the base 86, when the piston plate 51 is recovered, the downward pressure of the movable plate 84 in the hydraulic oil will cause the liquid to apply a reaction force to the movable plate 84, and this reaction force is opposite to the moving direction of the movable plate 84, thereby playing a buffering role, and the air bag 855 will also expand synchronously for buffering, thereby improving the overall stability of the equipment.

[0045] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A safety hydraulic cylinder for a hydraulic disc brake, comprising a hydraulic cylinder body (1), characterized in that: A piston rod (4) for supporting is arranged inside the hydraulic cylinder body (1), a sealing mechanism (7) is arranged between the piston rod (4) and the hydraulic cylinder body (1), the sealing mechanism (7) comprises a mounting plate (71) mounted on the top of the hydraulic cylinder body (1), a sealing member (73) for sealing the piston rod (4) is arranged between the piston rod (4) and the mounting plate (71), an annular groove for relieving stress is provided on the outer surface of the sealing member (73), and a plurality of air holes for exhausting air are provided inside the annular groove; A pressurizing assembly (74) is arranged inside the mounting plate (71), and the pressurizing assembly (74) comprises a telescopic cylinder (741) mounted inside the mounting plate (71), a telescopic rod (742) slidingly passing through the free end of the telescopic cylinder (741), a pressure plate (743) for applying pressure to the sealing element (73) being mounted at one end of the telescopic rod (742), and a through groove (744) for providing flow of hydraulic oil is provided between the telescopic cylinder (741) and the inner cavity of the hydraulic cylinder body (1); A liquid-passing assembly (75) is arranged inside the mounting plate (71) near the telescopic cylinder (741), and the liquid-passing assembly (75) comprises a baffle (751) arranged at one end of the telescopic cylinder (741), a first spring (752) is fixedly installed between the baffle (751) and the mounting plate (71), a fixed liquid groove (753) is provided on the surface of the mounting plate (71) near the through groove (744), and a rotating plate (754) is rotatably installed on the surface of the mounting plate (71) near the baffle (751), one end of the rotating plate (754) is connected to the baffle (751) by a connecting rope, and the free end of the rotating plate (754) rotates inside the fixed liquid groove (753); A collecting pipe (755) is installed inside the mounting plate (71) near the fixed liquid tank (753); an exhaust pipe (756) is installed in communication between the collecting pipe (755) and the fixed liquid tank (753); an exhaust groove (757) communicating with the outside is provided inside the mounting plate (71); one end of the collecting pipe (755) is in communication with the exhaust groove (757); The outer surface of the hydraulic cylinder body (1) is connected to and installed with a liquid inlet pipe (2) and a liquid outlet pipe (3), and the outer surfaces of the liquid inlet pipe (2) and the liquid outlet pipe (3) are both provided with a one-way valve, and the liquid inlet pipe (2) and the liquid outlet pipe (3) are respectively located at two ends of the movable mechanism (5).

2. A safety hydraulic cylinder for hydraulic disc brakes according to claim 1, characterized in that: A top plate (6) is mounted on the free end of the hydraulic cylinder body (1); the mounting plate (71) is arranged between the top plate (6) and the hydraulic cylinder body (1); and a first rubber ring (72) is arranged between the mounting plate (71) and the hydraulic cylinder body (1).

3. The safety hydraulic cylinder for hydraulic disc brake according to claim 1, characterized in that: A lubrication assembly (76) is arranged inside the mounting plate (71), and the lubrication assembly (76) comprises a second rubber ring (761) mounted on the inner wall of the mounting plate (71), a support ring (762) is fixedly mounted between the sealing member (73) and the second rubber ring (761), and a roller (763) is rotatably mounted on the outer surface of the support ring (762), and the roller (763) slides on the outer surface of the piston rod (4).

4. The safety hydraulic cylinder for hydraulic disc brake according to claim 1, characterized in that: A movable mechanism (5) is arranged inside the hydraulic cylinder body (1), and the movable mechanism (5) comprises a piston plate (51) slidably mounted in the inner cavity of the hydraulic cylinder body (1); the piston rod (4) is fixedly mounted on the surface of the piston plate (51); a groove (52) is formed on the outer surface of the piston plate (51); and a triangular washer (53) is mounted inside the groove (52).

5. A safety hydraulic cylinder for hydraulic disc brakes according to claim 4, characterized in that: A pressure-resistant mechanism (8) is provided at the bottom end of the hydraulic cylinder body (1), and the pressure-resistant mechanism (8) comprises a base (86) filled with hydraulic oil and fixedly mounted at the bottom end of the hydraulic cylinder body (1); a movable plate (84) is slidably mounted inside the base (86); a plurality of liquid outlet holes (83) are provided on the surface of the movable plate (84); a first positive magnetic block (81) is fixedly mounted on the surface of the piston plate (51) close to the movable plate (84); and a second positive magnetic block (82) is fixedly mounted on the top end of the movable plate (84).

6. A safety hydraulic cylinder for hydraulic disc brakes according to claim 5, characterized in that: A buffer assembly (85) is provided inside the pressure-resistant mechanism (8), and the buffer assembly (85) comprises a cylinder (852) fixedly mounted on the bottom end of the hydraulic cylinder body (1), a sliding rod (851) slidingly passing through one end of the cylinder (852) close to the piston plate (51), and a second spring (853) fixedly mounted between one end of the sliding rod (851) located inside the cylinder (852) and the cylinder (852).

7. A safety hydraulic cylinder for hydraulic disc brakes according to claim 6, characterized in that: A connecting tube (854) is installed in communication between the plurality of cylinders (852), a plurality of air bags (855) are provided on the inner bottom wall of the base (86), and an air guide tube (856) is installed in communication between the air bags (855) and the connecting tube (854).

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