Hydraulic spring energy storage cylinder and brake assembly

Abstract

The utility model relates to a hydraulic spring energy storage cylinder and a brake assembly. The hydraulic spring energy storage cylinder comprises a base used for containing the hydraulic spring energy storage cylinder, a piston is arranged in the base and does linear motion along with hydraulic change, the base comprises an upper end flange, the upper side of the upper end flange is fixedly connected with a shell, the upper end flange is provided with an oil way channel, and an oil way connector of the oil way channel is arranged on the side face of the upper end flange; the shell is fixedly connected with the upper end flange through a bolt, and the shell and the base form a cavity; the spring assembly is arranged in the cavity and comprises an energy storage spring and a spring seat, one end of the energy storage spring abuts against the inner top of the shell, the other end of the energy storage spring abuts against the spring seat, and the spring seat abuts against the piston. Release of the spring is adjusted through movement of the hydraulic control piston so as to provide needed power, enough parking efficiency can be provided and matched with service braking efficiency, and benefits of a hydraulic braking system of a truck with the larger total weight can be improved.

Description

Technical Field

[0001] This application relates to the field of mechanical equipment technology, and in particular to a hydraulic spring energy storage cylinder and brake assembly. Background Technology

[0002] In light truck braking systems, the common braking methods are air braking and hydraulic braking. Due to the special characteristics of truck driving environment and load, the performance requirements of the braking system are high, especially the implementation of the parking function. The design of the parking brake system must not only ensure the safety of the vehicle when parked, but also improve the stability and reliability of the braking system to a certain extent. To this end, different types of braking systems are designed with different working principles and structures to adapt to various usage scenarios.

[0003] In related technologies, pneumatic braking systems typically employ a spring energy storage structure to achieve the parking function. The air chamber is designed as a dual-chamber structure, with the driving chamber responsible for normal braking and the parking chamber equipped with an energy storage spring. When parking is applied, the pneumatic system releases the air pressure in the parking chamber, and the energy storage spring uses force to fix the rear wheels, ensuring the vehicle does not slip due to external forces. This method has strong parking efficiency and can effectively lock the wheels in emergencies, making it suitable for heavy-load and long-term parking scenarios. Hydraulic braking systems mostly use a mechanical cable-operated structure, achieving the parking function through a lever-pull plate structure. The actuator is usually installed inside the central brake on the driveshaft or the rear wheel drum brake; both configurations can be hydraulically controlled for braking.

[0004] However, among related technologies, pneumatic braking systems are complex in structure and dependent on air pressure. Pneumatic systems may freeze in low-temperature conditions, affecting the reliability of the parking function. Hydraulic braking systems have lower efficiency in parking braking, especially when hydraulic pressure is insufficient, resulting in weak parking braking force and potentially failing to effectively lock the wheels, posing a safety hazard. Furthermore, mechanical cable-operated structures have long response times, and the actuator mounting position limits the space for structural optimization, which may not meet the requirements of some vehicles with special design needs. Summary of the Invention

[0005] Therefore, it is necessary to provide a hydraulic spring energy storage cylinder and brake assembly to address the problem of low efficiency of hydraulic braking systems in parking braking.

[0006] In a first aspect, this application provides a hydraulic spring energy storage cylinder. The hydraulic spring energy storage cylinder includes:

[0007] The base is used to hold the hydraulic spring energy storage cylinder. A piston is installed inside the base. The piston moves linearly with the change of hydraulic pressure. The base includes an upper flange. The upper side of the upper flange is fixedly connected to the housing. The upper flange is provided with an oil passage. The oil passage interface is located on the side of the upper flange.

[0008] The housing is fixedly connected to the upper flange by bolts, and the housing and the base form a cavity;

[0009] A spring assembly is housed in a chamber. The spring assembly includes a storage spring and a spring seat. One end of the storage spring abuts against the inner top of the housing, and the other end of the storage spring abuts against the spring seat. The spring seat abuts against the piston.

[0010] In one embodiment, the upper flange is also provided with a venting channel, the oil passage is connected to the venting channel, the venting port of the venting channel is located on the side of the upper flange, and the oil passage port of the oil passage and the venting port of the venting channel are symmetrically arranged about the central axis of the upper flange, and a venting screw is installed at the venting port.

[0011] In one embodiment, the base also includes a main body connected to the lower side of the upper flange, and a boss connected to the upper side of the upper flange. The boss is a hollow cylindrical tube, and the piston is placed inside the boss.

[0012] In one embodiment, the piston has a push rod at its lower end, which passes through the center hole of the upper flange and is embedded inside the body. The upper end of the piston abuts against the spring seat.

[0013] In one embodiment, the base further includes a lower flange, and both the upper and lower flanges are provided with evenly distributed mounting holes.

[0014] In one embodiment, a first sealing ring is fixedly provided on the inner side of the top of the boss, and a second sealing ring is fixedly provided on the inner ring of the center hole of the upper flange.

[0015] The upper flange, boss, piston, first sealing ring and second sealing ring form a liquid storage chamber, which is connected to the oil passage and the venting passage respectively.

[0016] In one embodiment, a first sealing ring is provided at the end of the piston near the base, and a second sealing ring is provided at the lower end of the piston rod;

[0017] The upper flange, boss, piston, first sealing ring and second sealing ring form a liquid storage chamber, which is connected to the oil passage and the venting passage respectively.

[0018] In one embodiment, the spring seat includes a first cylindrical tube, a second cylindrical tube, a first annular plate, and a second annular plate. The lower ends of the first cylindrical tube and the second cylindrical tube are both connected to the first annular plate, and the upper end of the second cylindrical tube is connected to the second annular plate. The first cylindrical tube, the second cylindrical tube, the first annular plate, and the second annular plate are integral structures.

[0019] The upper end of the piston abuts against the second annular plate.

[0020] In one embodiment, the hydraulic spring energy storage cylinder further includes a limiting assembly, which includes a screw, a limiting nut, a driving nut, and a pin. The screw is housed inside the housing, with its upper end extending from the top of the housing and its lower end passing through the spring seat. The limiting nut, driving nut, and pin are located at the upper end of the screw. The limiting nut is fixedly connected to the top of the housing. A limiting ring block is provided at the lower end of the screw, and the limiting ring block abuts against the spring seat.

[0021] Secondly, this application also provides a brake assembly. The brake assembly includes a hydraulic spring energy storage cylinder and a brake as described in any of the above embodiments, wherein the brake is fixedly connected to the lower end flange of the base in the hydraulic spring energy storage cylinder.

[0022] The aforementioned hydraulic spring energy storage cylinder and brake assembly, by setting a base and a housing to form a chamber for accommodating the spring assembly, has the energy storage spring in contact with the top of the housing and the spring seat at both ends, respectively. Meanwhile, the upper flange of the base is provided with an oil passage. Liquid enters the energy storage cylinder through the oil passage and, through hydraulic pressure, causes the piston to move linearly upwards. The piston lifts the spring seat and compresses the energy storage spring. Alternatively, liquid flows out of the energy storage cylinder through the oil passage and, through hydraulic pressure, causes the piston to move linearly downwards, releasing energy and pushing the spring seat downwards. In other words, energy is stored through the compression of the energy storage spring, and the release of the spring is adjusted by hydraulically controlling the movement of the piston to provide the required power. This provides sufficient parking efficiency and matches the service braking efficiency, enabling the use of hydraulic braking systems in trucks with larger total weights, thus improving efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a hydraulic spring energy storage cylinder provided in one embodiment.

[0024] Figure 2 A schematic diagram of the structure of a hydraulic spring energy storage cylinder provided for another embodiment.

[0025] Figure 3 This is a schematic diagram of a brake assembly provided in one embodiment.

[0026] Figure 4 A cross-sectional structural schematic diagram of a brake assembly provided for another embodiment.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10 - Hydraulic spring accumulator cylinder; 20 - Brake;

[0029] 110-Base, 120-Housing, 130-Spring assembly, 140-Limiting assembly, 150-Piston, 160-First sealing ring, 170-Second sealing ring;

[0030] 111-Upper flange, 112-Body, 113-Oil circuit interface, 114-Vent screw, 115-Lower flange;

[0031] 131 - Energy storage spring, 132 - Spring seat;

[0032] 141-Screw, 142-Limit nut, 143-Drive nut, 144-Pin. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0035] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] See Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a hydraulic spring energy storage cylinder according to one embodiment of this application is shown. Figure 2A schematic diagram of a hydraulic spring energy storage cylinder according to another embodiment of this application is shown. The hydraulic spring energy storage cylinder 10 includes a base 110, a housing 120, and a spring assembly 130. The housing 120 is mounted on the base 110, and the housing 120 and the base 110 form a chamber. The spring assembly 130 is disposed within the chamber formed by the housing 120 and the base 110. A piston 150 is disposed within the base 110, and the piston 150 moves linearly with changes in hydraulic pressure. The spring assembly 130 includes an energy storage spring 131 and a spring seat 132. One end of the energy storage spring 131 abuts against the inner top of the housing 120, and the other end of the energy storage spring 131 abuts against the spring seat 132. The spring seat 132 abuts against the piston 150. The base 110 includes an upper flange 111, the upper side of which is fixedly connected to the housing 120. An oil passage is provided within the upper flange 111, and the oil passage interface 113 is disposed on the side of the upper flange 111.

[0040] The working process of the hydraulic spring energy storage cylinder 10 is based on the combined action of hydraulic pressure and spring, as follows:

[0041] When liquid is injected into the hydraulic spring storage cylinder 10 by the hydraulic system, the piston 150 in the base 110 moves linearly with the change in hydraulic pressure. As the hydraulic pressure increases, the piston 150 is pushed upward and pushes against the spring seat 132, which in turn compresses the energy storage spring 131. Since one end of the energy storage spring 131 abuts against the top of the housing 120 and the other end abuts against the spring seat 132, the contact between the spring seat 132 and the piston 150 ensures the stability of the piston 150's direction of movement and stroke.

[0042] When it is necessary to release the parking brake, liquid is injected into the energy storage cylinder through the oil line interface 113. The hydraulic pressure pushes the piston 150 to move upward, and the piston 150 pushes the spring seat 132, compressing the energy storage spring 131.

[0043] When parking is required, the liquid is unloaded from the oil line interface 113, the energy storage spring 131 is released, and the spring seat 132 and piston 150 are pushed downward.

[0044] In the aforementioned hydraulic spring energy storage cylinder 10, a chamber is formed by setting a base 110 and a housing 120 to accommodate the spring assembly 130. The two ends of the energy storage spring 131 in the spring assembly 130 are in contact with the top of the housing 120 and the spring seat 132, respectively. At the same time, the upper flange 111 of the base 110 is provided with an oil passage. Liquid enters the energy storage cylinder through the oil passage and then, through hydraulic pressure, causes the piston 150 to move upward in a straight line. The piston 150 lifts the spring seat 132 and compresses the energy storage spring 131. Alternatively, liquid flows out of the energy storage cylinder through the oil passage and then, through hydraulic pressure, causes the piston 150 to move upward in a straight line. The energy storage spring 131 releases energy and pushes the spring seat 132 downward. That is, energy is stored by compressing the energy storage spring 131, and the release of the spring is adjusted by hydraulically controlling the movement of the piston 150 to provide the required power. This provides sufficient parking efficiency and matches the service braking efficiency, enabling the use of hydraulic braking systems for trucks with larger total weights and improving efficiency.

[0045] Continue reading Figure 1 and Figure 2 The upper flange 111 is also provided with a venting channel, which is connected to the oil passage. The venting port of the venting channel is located on the side of the upper flange 111, and the oil passage port 113 of the oil passage and the venting port of the venting channel are symmetrically arranged about the central axis of the upper flange 111. A venting screw 114 is installed at the venting port.

[0046] Before using the hydraulic spring accumulator cylinder 10, the venting channel is connected to the outside via the venting screw 114. The control hydraulic system injects liquid into the oil passage through the oil line interface 113. As the liquid is injected, the gas in the hydraulic spring accumulator cylinder 10 is discharged to the outside through the venting channel and the venting screw 114. Once the liquid has been discharged from the venting screw 114, the venting screw 114 is adjusted to isolate the venting channel from the outside.

[0047] Continue reading Figure 1 and Figure 2 The base 110 of the hydraulic spring energy storage cylinder 10 also includes a main body 112, which is located below the upper flange 111 and is an integral structure with the upper flange 111. A boss is provided on the upper side of the upper flange 111; this boss is a cylindrical, hollow structure. A piston 150 is embedded in this boss and abuts against the spring assembly 130.

[0048] Continue reading Figure 1 and Figure 2 The piston 150 has a push rod at its lower end. The push rod passes through the center hole of the upper flange 111 and is embedded inside the body 112. The upper end of the piston 150 abuts against the spring seat 132.

[0049] When parking is required, the fluid is unloaded from the oil line interface 113, the energy storage spring 131 is released, and the spring seat 132 and piston 150 are pushed downward. At the same time, the push rod of piston 150 slides downward in the center hole of the upper flange 111, and piston 150 moves linearly along the push rod direction.

[0050] Continue reading Figure 1 In one embodiment, a first groove is formed on the inner side of the top of the boss, and a first sealing ring 160 is fixedly disposed in the first groove. Furthermore, a second groove is formed on the inner ring of the center hole of the upper flange 111, and a second sealing ring 170 is fixedly disposed in the second groove.

[0051] The upper flange 111, boss, piston 150, first sealing ring 160 and second sealing ring 170 form a liquid storage chamber for storing liquid, and the liquid storage chamber is connected to the oil passage and the venting passage respectively.

[0052] Continue reading Figure 2 In one embodiment, the piston 150 is provided with a first sealing ring 160 at one end near the base 110, and a second sealing ring 170 is provided at the lower end of the piston 150 push rod.

[0053] The upper flange 111, boss, piston 150, first sealing ring 160 and second sealing ring 170 form a liquid storage chamber for storing liquid, and the liquid storage chamber is connected to the oil passage and the venting passage respectively.

[0054] Continue reading Figure 1 and Figure 2 The spring seat 132 adopts an "arch" shaped structure. The spring seat 132 includes a first cylindrical tube, a second cylindrical tube, a first annular plate, and a second annular plate. The lower ends of the first cylindrical tube and the lower ends of the second cylindrical tube are both connected to the first annular plate, and the upper end of the second cylindrical tube is connected to the second annular plate. The first cylindrical tube, the second cylindrical tube, the first annular plate, and the second annular plate are an integral structure.

[0055] As can be seen from the connection structure of the first cylindrical tube, the second cylindrical tube, the first annular plate and the second annular plate, the spring seat 132 forms a downward-opening central groove and an upward-opening annular groove. The lower end of the energy storage spring 131 is embedded in the upward-opening annular groove, and the upper end of the piston 150 abuts against the inner top of the downward-opening central groove.

[0056] When it is necessary to release the parking brake, liquid is injected into the energy storage cylinder through the oil line interface 113. The hydraulic pressure pushes the piston 150 to move upward. The piston 150 pushes the spring seat 132 that is in contact with it, causing the spring seat 132 to move upward. The upward-moving spring seat 132 compresses the energy storage spring 131.

[0057] Continue reading Figure 1 and Figure 2 The hydraulic spring energy storage cylinder 10 also includes a limiting assembly 140, which includes a screw 141, a limiting nut 142, a driving nut 143, and a pin 144. The screw 141 is installed inside the housing 120. The upper end of the screw 141 extends out from the top of the housing 120 and the lower end of the screw 141 passes through the spring seat 132. The limiting nut 142, the driving nut 143, and the pin 144 are installed at the upper end of the screw 141. The limiting nut 142 is fixedly connected to the top of the housing 120. A limiting ring block is provided at the lower end of the screw 141, and the limiting ring block abuts against the spring seat 132.

[0058] When mechanical release of the parking brake is required, the operator twists the drive nut 143, which drives the screw 141 to rotate and move upward. As the screw 141 moves upward, the limiting ring block at the lower end of the screw 141 drives the spring seat 132 to move upward along the direction of the screw 141 and compress the energy storage spring 131.

[0059] Continue reading Figure 1 and Figure 2 The base 110 of the hydraulic spring energy storage cylinder 10 also includes a lower flange 115. Both the lower flange 115 and the upper flange 111 are provided with evenly distributed mounting holes, and the housing 120 is provided with mounting holes that correspond one-to-one with the mounting holes of the upper flange 111.

[0060] In one exemplary embodiment, such as Figure 1 As shown, a hydraulic spring energy storage cylinder 10 is provided. The hydraulic spring energy storage cylinder 10 includes a base 110, a housing 120, and a spring assembly 130. The housing 120 is mounted on the base 110, and the housing 120 and the base 110 form a cavity. The spring assembly 130 is disposed within the cavity formed by the housing 120 and the base 110. A piston 150 is disposed inside the base 110, and the piston 150 moves linearly in response to changes in hydraulic pressure.

[0061] The spring assembly 130 includes an energy storage spring 131 and a spring seat 132. One end of the energy storage spring 131 abuts against the inner top of the housing 120, and the other end of the energy storage spring 131 abuts against the spring seat 132. The spring seat 132 abuts against the piston 150. The spring seat 132 adopts an "arch"-shaped structure and includes a first cylindrical tube, a second cylindrical tube, a first annular plate, and a second annular plate. The lower ends of the first and second cylindrical tubes are both connected to the first annular plate, and the upper end of the second cylindrical tube is connected to the second annular plate. The first cylindrical tube, the second cylindrical tube, the first annular plate, and the second annular plate are integral structures. From the connection structure of the first cylindrical tube, the second cylindrical tube, the first annular plate, and the second annular plate, it can be seen that the spring seat 132 forms a downward-opening central groove and an upward-opening annular groove. The lower end of the energy storage spring 131 is embedded in the upward-opening annular groove, and the upper end of the piston 150 abuts against the inner top of the downward-opening central groove.

[0062] The base 110 includes an upper flange 111, the upper side of which is fixedly connected to the housing 120. An oil passage is provided within the upper flange 111, and the oil passage interface 113 is located on the side of the upper flange 111. The upper flange 111 also includes a venting passage, which communicates with the oil passage. The venting interface of the venting passage is located on the side of the upper flange 111, and the oil passage interface 113 and the venting interface are symmetrically arranged about the central axis of the upper flange 111. A venting screw 114 is installed at the venting interface. The base 110 also includes a main body 112, which is located below the upper flange 111 and is an integral structure with the upper flange 111. A boss, which is a cylindrical and hollow structure, is provided on the upper side of the upper flange 111. Piston 150 is embedded in the boss and abuts against spring assembly 130. A push rod is provided at the lower end of piston 150, passing through the central hole of upper flange 111 and embedded inside body 112. The upper end of piston 150 abuts against spring seat 132. A first groove is formed on the inner side of the top of the boss, and a first sealing ring 160 is fixedly installed in this groove. A second groove is formed on the inner ring of the central hole of upper flange 111, and a second sealing ring 170 is fixedly installed in this groove. Thus, upper flange 111, boss, piston 150, first sealing ring 160, and second sealing ring 170 form a liquid storage chamber for storing liquid, and this liquid storage chamber is connected to an oil passage and a venting passage, respectively.

[0063] The hydraulic spring energy storage cylinder 10 also includes a limiting assembly 140, which includes a screw 141, a limiting nut 142, a driving nut 143, and a pin 144. The screw 141 is housed inside the housing 120. The upper end of the screw 141 extends out from the top of the housing 120 and the lower end of the screw 141 passes through the spring seat 132. The limiting nut 142, the driving nut 143, and the pin 144 are located at the upper end of the screw 141. The limiting nut 142 is fixedly connected to the top of the housing 120. A limiting ring block is provided at the lower end of the screw 141, and the limiting ring block abuts against the spring seat 132.

[0064] When it is necessary to release the parking brake, liquid is injected into the energy storage cylinder through the oil line interface 113. The hydraulic pressure pushes the piston 150 to move upward, and the piston 150 pushes the spring seat 132, compressing the energy storage spring 131.

[0065] When parking is required, the liquid is unloaded from the oil line interface 113, the energy storage spring 131 is released, and the spring seat 132 and piston 150 are pushed downward.

[0066] When mechanical release of the parking brake is required, the operator twists the drive nut 143, which drives the screw 141 to rotate and move upward. As the screw 141 moves upward, the limiting ring block at the lower end of the screw 141 drives the spring seat 132 to move upward along the direction of the screw 141 and compress the energy storage spring 131.

[0067] In one exemplary embodiment, such as Figure 2 As shown, a hydraulic spring energy storage cylinder 10 is provided. The hydraulic spring energy storage cylinder 10 includes a base 110, a housing 120, and a spring assembly 130. The housing 120 is mounted on the base 110, and the housing 120 and the base 110 form a cavity. The spring assembly 130 is disposed within the cavity formed by the housing 120 and the base 110. A piston 150 is disposed inside the base 110, and the piston 150 moves linearly in response to changes in hydraulic pressure.

[0068] The spring assembly 130 includes an energy storage spring 131 and a spring seat 132. One end of the energy storage spring 131 abuts against the inner top of the housing 120, and the other end of the energy storage spring 131 abuts against the spring seat 132. The spring seat 132 abuts against the piston 150. The spring seat 132 adopts an "arch"-shaped structure and includes a first cylindrical tube, a second cylindrical tube, a first annular plate, and a second annular plate. The lower ends of the first and second cylindrical tubes are both connected to the first annular plate, and the upper end of the second cylindrical tube is connected to the second annular plate. The first cylindrical tube, the second cylindrical tube, the first annular plate, and the second annular plate are integral structures. From the connection structure of the first cylindrical tube, the second cylindrical tube, the first annular plate, and the second annular plate, it can be seen that the spring seat 132 forms a downward-opening central groove and an upward-opening annular groove. The lower end of the energy storage spring 131 is embedded in the upward-opening annular groove, and the upper end of the piston 150 abuts against the inner top of the downward-opening central groove.

[0069] The base 110 includes an upper flange 111, the upper side of which is fixedly connected to the housing 120. An oil passage is provided within the upper flange 111, and the oil passage interface 113 is located on the side of the upper flange 111. The upper flange 111 also includes a venting passage, which communicates with the oil passage. The venting interface of the venting passage is located on the side of the upper flange 111, and the oil passage interface 113 and the venting interface are symmetrically arranged about the central axis of the upper flange 111. A venting screw 114 is installed at the venting interface. The base 110 also includes a main body 112, which is located below the upper flange 111 and is an integral structure with the upper flange 111. A boss, which is a cylindrical and hollow structure, is provided on the upper side of the upper flange 111. Piston 150 is embedded in the boss and abuts against spring assembly 130. A push rod is provided at the lower end of piston 150, passing through the center hole of upper flange 111 and embedded inside body 112. The upper end of piston 150 abuts against spring seat 132. A first sealing ring 160 is provided at the end of piston 150 near base 110, and a second sealing ring 170 is provided at the lower end of the push rod of piston 150. The upper flange 111, boss, piston 150, first sealing ring 160, and second sealing ring 170 form a liquid storage chamber for storing liquid, which is connected to both an oil passage and a venting passage.

[0070] The hydraulic spring energy storage cylinder 10 also includes a limiting assembly 140, which includes a screw 141, a limiting nut 142, a driving nut 143, and a pin 144. The screw 141 is housed inside the housing 120. The upper end of the screw 141 extends out from the top of the housing 120 and the lower end of the screw 141 passes through the spring seat 132. The limiting nut 142, the driving nut 143, and the pin 144 are located at the upper end of the screw 141. The limiting nut 142 is fixedly connected to the top of the housing 120. A limiting ring block is provided at the lower end of the screw 141, and the limiting ring block abuts against the spring seat 132.

[0071] When it is necessary to release the parking brake, liquid is injected into the energy storage cylinder through the oil line interface 113. The hydraulic pressure pushes the piston 150 to move upward, and the piston 150 pushes the spring seat 132, compressing the energy storage spring 131.

[0072] When parking is required, the liquid is unloaded from the oil line interface 113, the energy storage spring 131 is released, and the spring seat 132 and piston 150 are pushed downward.

[0073] When mechanical release of the parking brake is required, the operator twists the drive nut 143, which drives the screw 141 to rotate and move upward. As the screw 141 moves upward, the limiting ring block at the lower end of the screw 141 drives the spring seat 132 to move upward along the direction of the screw 141 and compress the energy storage spring 131.

[0074] See Figure 3 and Figure 4 , Figure 3 A schematic diagram of the brake assembly according to one embodiment of this application is shown. Figure 4 A cross-sectional schematic diagram of a brake assembly according to another embodiment of this application is shown. The brake assembly includes a hydraulic spring energy storage cylinder 10 and a brake 20 as described above, wherein the brake 20 is fixedly connected to the lower end flange 115 of the base 110 in the hydraulic spring energy storage cylinder 10.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A hydraulic spring accumulator cylinder, characterized by, The hydraulic spring energy storage cylinder comprises: a base for placing the hydraulic spring energy storage cylinder, a piston is arranged in the base, the piston moves linearly with hydraulic changes, the base comprises an upper end flange, the upper side of the upper end flange is fixedly connected with a shell, the upper end flange is provided with an oil passage, and the oil passage interface of the oil passage is arranged on the side surface of the upper end flange; a shell, which is fixedly connected with the upper end flange through bolts, and forms a cavity with the base; a spring assembly, which is arranged in the cavity, comprises an energy storage spring and a spring seat, one end of the energy storage spring abuts against the inner top of the shell, and the other end of the energy storage spring abuts against the spring seat, and the spring seat abuts against the piston.

2. The hydraulic spring accumulator cylinder of claim 1, wherein, The upper end flange is also provided with a gas discharge passage, the oil passage and the gas discharge passage are communicated, the gas discharge interface of the gas discharge passage is arranged on the side surface of the upper end flange, the oil passage interface and the gas discharge interface of the gas discharge passage are symmetrically arranged about the central axis of the upper end flange, and a gas discharge screw is arranged at the gas discharge interface.

3. The hydraulic spring accumulator cylinder of claim 1, wherein, The base further comprises a main body connected with the lower side of the upper end flange, the upper side of the upper end flange is further connected with a boss, the boss is a hollow cylindrical barrel, and the piston is arranged inside the boss.

4. The hydraulic spring accumulator cylinder of claim 3, wherein, The piston is provided with a push rod at the lower end, the push rod passes through the central hole of the upper end flange and is embedded in the main body, and the upper end of the piston abuts against the spring seat.

5. The hydraulic spring accumulator cylinder of claim 3, wherein, The base further comprises a lower end flange, and the upper end flange and the lower end flange are both provided with uniformly distributed mounting holes.

6. The hydraulic spring accumulator cylinder of claim 3, wherein, The inner side of the top end of the boss is fixedly provided with a first sealing ring, and the inner ring of the central hole of the upper end flange is fixedly provided with a second sealing ring; The upper end flange, the boss, the piston, the first sealing ring and the second sealing ring form a liquid temporary storage cavity, and the liquid temporary storage cavity is communicated with the oil passage and the gas discharge passage respectively.

7. The hydraulic spring accumulator cylinder of claim 3, wherein, The end of the piston close to the base is provided with a first sealing ring, and the lower end of the push rod of the piston is provided with a second sealing ring; The upper end flange, the boss, the piston, the first sealing ring and the second sealing ring form a liquid temporary storage cavity, and the liquid temporary storage cavity is communicated with the oil passage and the gas discharge passage respectively.

8. The hydraulic spring accumulator cylinder of claim 1, wherein, The spring seat comprises a first cylindrical barrel, a second cylindrical barrel, a first annular plate and a second annular plate, the lower end of the first cylindrical barrel and the lower end of the second cylindrical barrel are connected with the first annular plate, the upper end of the second cylindrical barrel is connected with the second annular plate, and the first cylindrical barrel, the second cylindrical barrel, the first annular plate and the second annular plate are an integral structure; The upper end of the piston abuts against the second annular plate.

9. The hydraulic spring accumulator cylinder of claim 1, wherein, The hydraulic spring energy storage cylinder further comprises a limiting assembly, the limiting assembly comprises a screw rod, a limiting nut, a driving nut and a pin, the screw rod is arranged in the shell, the upper end of the screw rod is out of the top of the shell and the lower end of the screw rod passes through the spring seat, the limiting nut, the driving nut and the pin are arranged at the upper end of the screw rod, the limiting nut is fixedly connected with the top of the shell, the lower end of the screw rod is provided with a limiting ring block, and the limiting ring block abuts against the spring seat.

10. A brake assembly characterized by, The hydraulic spring energy storage cylinder and a brake are included, the brake is fixedly connected with the lower end flange of the bottom of the hydraulic spring energy storage cylinder.

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