Brake Actuation System

Abstract

The present invention provides a brake execution system, including a first gear for connecting a brake object; a second gear meshing with the first gear; a rotating brake mechanism, including a rotating shaft and a brake assembly, the rotating shaft is rotatably connected to the brake assembly, one end of the rotating shaft is passed through the second gear, and the brake assembly is used to limit the rotation of the rotating shaft; a locking mechanism is arranged on the second gear, and is used to lock the rotating shaft so that the second gear and the rotating shaft rotate or stop synchronously; and a driving mechanism is used to drive the locking mechanism. The present invention adopts the second gear, the rotating brake mechanism, the locking mechanism and the first gear to replace the traditional brake caliper and brake pad, and the rotation of the rotating shaft is limited by the brake assembly, and the rotating shaft is locked with the second gear by the locking mechanism, so that the brake assembly brakes the second gear and the first gear, thereby effectively solving the technical problems of failure of the automobile brake pad leading to brake failure and frequent replacement leading to increased use costs, and improving the reliability of the brake execution system.

Description

Technical Field

[0001] The present invention belongs to the technical field of braking systems, and more specifically, relates to a braking execution system. Background Art

[0002] At present, a conventional automotive braking system mainly consists of a control system (including pedals, hand brakes, etc.), an anti-lock braking system (including sensors, controllers, ABS pumps, etc.), an execution system (including brake pumps, hydraulic hoses, brake calipers, brake discs, brake pads, etc.), and an assist system (including a vacuum assist pump, etc.). Although the automotive braking system adopts multi-level protection settings, during actual use, the execution system still often experiences brake failures. The main reasons for brake failures are as follows:

[0003] First, there is a lack of necessary maintenance for the execution system, such as excessive impurity deposition in the brake pump, loose sealing at the interface between the brake pump and the hydraulic hose, etc.;

[0004] Second, mechanical components malfunction. For example, long downhill driving can cause the brake pads to generate heat through friction and carbonize on the surface of the brake pads, resulting in the failure of the braking function;

[0005] Third, the vehicle is overloaded. Under the action of gravitational acceleration, the moving inertia of the vehicle is increased, resulting in the failure of the braking function.

[0006] In the above three situations, the first and third points can be solved by increasing maintenance, inspections, etc. For the second point, there is currently no reliable and effective solution, and it can only be prevented by frequently replacing the brake pads, which greatly increases the use cost of the vehicle. Summary of the Invention

[0007] The purpose of the present invention is to provide a braking execution system, including but not limited to solving the technical problems of brake failure caused by the failure of automotive brake pads and the increased use cost caused by frequent replacement.

[0008] To solve the above technical problems, an embodiment of the present invention provides a braking execution system, including:

[0009] A first gear for connecting a braking object;

[0010] A second gear meshing with the first gear;

[0011] A rotary braking mechanism including a rotating shaft and a braking component. The rotating shaft is rotatably connected to the braking component, one end of the rotating shaft passes through the second gear, and the braking component is used to limit the rotation of the rotating shaft;

[0012] A locking mechanism disposed on the second gear for locking the rotating shaft so that the second gear rotates or stops synchronously with the rotating shaft; and

[0013] A driving mechanism for driving the locking mechanism.

[0014] Further, the locking mechanism includes:

[0015] A hydraulic cylinder, the piston rod of which can abut against the rotating shaft;

[0016] A hydraulic rotary joint for connecting the hydraulic cylinder and the driving mechanism; and

[0017] A first oil pipe, one end of which communicates with the hydraulic cylinder and the other end of which communicates with the hydraulic rotary joint.

[0018] Further, the locking mechanism includes at least two such hydraulic cylinders, and the at least two hydraulic cylinders are equidistantly distributed around the inner hole of the second gear, and the axis of the piston rod of the hydraulic cylinder is perpendicular to the axis of the rotating shaft.

[0019] Further, a groove is formed in the end of the rotating shaft, and the protruding end of the piston rod of the hydraulic cylinder can extend into the groove to form a positioning.

[0020] Further, the driving mechanism includes:

[0021] A hydraulic pump; and

[0022] A second oil pipe, one end of which communicates with the hydraulic pump and the other end of which communicates with the hydraulic rotary joint.

[0023] Further, the rotating shaft includes a stop portion protruding from the surface of the rotating shaft, and the braking assembly includes:

[0024] A cylinder body;

[0025] A first end cover covering one end of the cylinder body;

[0026] A second end cover covering the other end of the cylinder body, and a sealing cavity is formed by enclosing the second end cover, the first end cover and the cylinder body, the stop portion is accommodated in the sealing cavity and there is a throttling gap between the stop portion and the cylinder body; and

[0027] Elastic clay filled in the sealing cavity.

[0028] Further, the opposite ends of the rotating shaft respectively extend out of the sealing cavity from the first end cover and the second end cover and extend into the inner holes of the two second gears.

[0029] Further, one end of the rotating shaft extends out of the sealing cavity from the first end cover and extends into the inner hole of the second gear.

[0030] Furthermore, the stopper portion includes at least two of the blocking segments, and the at least two blocking segments are circumferentially distributed at equal intervals.

[0031] Furthermore, a throttling hole is formed in the blocking segment. The blocking segment includes a first blocking surface and a second blocking surface which are oppositely arranged, and the throttling hole extends from the first blocking surface to the second blocking surface.

[0032] The beneficial effects of the braking execution system provided by the present invention are as follows: By adopting the cooperation of the second gear, the rotary braking mechanism, the locking mechanism and the first gear, the traditional brake caliper and brake pads are replaced. The rotation of the rotating shaft is restricted by the braking assembly, and the rotating shaft and the second gear are locked by the locking mechanism, so as to realize the braking of the braking assembly on the second gear and the first gear, thus effectively solving the technical problems that the brake failure of the automobile brake pads leads to brake failure and the frequent replacement increases the use cost, improving the reliability of the braking execution system, and reducing the use cost of the braking execution system. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings according to these drawings without creative efforts.

[0034] Figure 1 It is a schematic structural diagram of the braking execution system provided in the first embodiment of the present invention;

[0035] Figure 2 It is a partial three-dimensional schematic diagram of the braking execution system provided in the first embodiment of the present invention;

[0036] Figure 3 It is a three-dimensional schematic diagram of the locking mechanism in the braking execution system provided in the first embodiment of the present invention;

[0037] Figure 4 It is a rear view schematic diagram of the locking mechanism in the braking execution system provided in the first embodiment of the present invention;

[0038] Figure 5 It is a three-dimensional schematic diagram of the hydraulic cylinder in the locking mechanism provided in the first embodiment of the present invention;

[0039] Figure 6 It is an axial sectional schematic diagram of the rotary braking mechanism in the braking execution system provided in the first embodiment of the present invention;

[0040] Figure 7 It is a three-dimensional surface schematic diagram of the rotating shaft in the rotary braking mechanism provided in the first embodiment of the present invention;

[0041] Figure 8 is Figure 6 a schematic cross-sectional view in the I-I direction in

[0042] Figure 9 a schematic structural view of the brake execution system provided in the second embodiment of the present invention;

[0043] Figure 10 a schematic axial cross-sectional view of the rotary braking mechanism in the brake execution system provided in the second embodiment of the present invention.

[0044] Among them, the reference numerals in the figure are as follows:

[0045] 1 - brake execution system, 2 - braking object, 11 - first gear, 12 - second gear, 13 - rotary braking mechanism, 14 - locking mechanism, 15 - driving mechanism, 120 - inner hole, 131 - rotating shaft, 132 - braking component, 141 - hydraulic cylinder, 142 - hydraulic rotary joint, 143 - first oil pipe, 151 - hydraulic pump, 152 - second oil pipe, 1311 - groove, 1312 - stop portion, 1313 - shaft shoulder, 1321 - cylinder body, 1322 - first end cover, 1323 - second end cover, 1324 - static sealing ring, 1325 - dynamic sealing ring, 1411 - piston rod, 1412 - cylinder block, 1413 - oil inlet, 1414 - oil return port, 1420 - connection port, 1320a - sealing cavity, 1320b - throttling gap, 13121 - blocking split body, 13122 - throttling hole, 13121a - first blocking surface, 13121b - second blocking surface. Specific embodiments

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component. The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. The terms "first" and "second" are only for the purpose of convenient description, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of technical features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0048] Now, the braking execution system provided by the present invention will be described.

[0049] Embodiment 1:

[0050] Please refer to Figure 1 and Figure 2 , the braking execution system 1 includes a first gear 11, a second gear 12, a rotary braking mechanism 13, a locking mechanism 14 and a driving mechanism 15. Among them, the first gear 11 is used to connect the braking object 2, the second gear 12 meshes with the first gear 11, the rotary braking mechanism 13 includes a rotating shaft 131 and a braking assembly 132, the rotating shaft 131 is rotatably connected to the braking assembly 132, and one end of the rotating shaft 131 passes through the second gear 12, and the braking assembly 132 is used to limit the rotation of the rotating shaft 131. The locking mechanism 14 is disposed on the second gear 12 and is used to lock the rotating shaft 131 so that the second gear 12 rotates or stops synchronously with the rotating shaft 131, and the driving mechanism 15 is used to drive the locking mechanism 14.

[0051] It can be understood that the braking object 2 refers to a wheel or a hatch door, etc. The first gear 11 is sleeved on the wheel axle of the wheel or the hinge shaft of the hatch door, and rotates or stops synchronously with the wheel axle or the hinge shaft; an inner hole 120 is formed in the middle of the second gear 12, one end of the rotating shaft 131 passes through the inner hole 120, and the axis of the rotating shaft 131 is on the same straight line as the axis of the second gear 12; the driving mechanism 15 is controlled by the control system of the entire mobile device, and the mobile device can be an automobile, a train, a boat or an airplane, etc.

[0052] To better illustrate the working principle of the braking execution system 1, an example of an automobile is given as follows: When parking is required, the driver first steps on the brake, triggering the driving mechanism 15. Then, the driving mechanism 15 drives the locking mechanism 14 to start. Next, the locking mechanism 14 tightly connects the rotating shaft 131 and the second gear 12. Then, the second gear 12 drives the rotating shaft 131 to rotate. Subsequently, a relative rotation occurs between the rotating shaft 131 and the braking assembly 132. Then, the braking assembly 132 is triggered and generates a damping force to limit the rotation of the rotating shaft 131. Then, the rotating shaft 131 limits the rotation of the second gear 12 through the locking mechanism 14, and the second gear 12 limits the rotation of the wheel through the first gear 11, thereby achieving parking.

[0053] The braking execution system 1 provided by the present invention adopts the cooperation of the second gear 12, the rotary braking mechanism 13, the locking mechanism 14 and the first gear 11, replacing the traditional brake calipers and brake pads. By limiting the rotation of the rotating shaft 131 through the braking assembly 132 and locking the rotating shaft 131 and the second gear 12 through the locking mechanism 14, the braking of the second gear 12 and the first gear 11 by the braking assembly 132 is realized, effectively solving the technical problems of brake failure caused by the failure of automobile brake pads and increased use costs caused by frequent replacement, improving the reliability of the braking execution system and reducing the use cost of the braking execution system.

[0054] Further, please refer to Figures 3 to 5, in this embodiment, the locking mechanism 14 includes a hydraulic cylinder 141, a hydraulic rotary joint 142, and a first oil pipe 143. Among them, the piston rod 1411 of the hydraulic cylinder 141 can abut against the rotating shaft 131. The hydraulic rotary joint 142 is used to connect the hydraulic cylinder 141 and the driving mechanism 15. One end of the first oil pipe 143 communicates with the hydraulic cylinder 141, and the other end of the first oil pipe 143 communicates with the hydraulic rotary joint 142. Specifically, the hydraulic rotary joint 142 is a device commonly used in the art to convey fluid media to hydraulic actuators on rotating equipment. It is internally provided with independent pipelines and two precision bearings, and has the characteristics of stable operation, firmness, flexibility, and small friction coefficient. Here, the fluid medium is preferably oil. An oil inlet 1413 and an oil return port 1414 are provided on the cylinder block 1412 of the hydraulic cylinder 141. The oil inlet 1413 communicates with the oil outlet of the hydraulic rotary joint 142 through the first oil pipe 143, and the oil return port 1414 communicates with the oil return port of the hydraulic rotary joint 142 through the first oil pipe 143. A connection port 1420 is also provided on the hydraulic rotary joint 142, and the hydraulic rotary joint 142 communicates with the driving mechanism 15 through the connection port 1420. When the braking execution system 1 operates, the driving mechanism 15 drives the oil to flow into the hydraulic rotary joint 142 from the connection port 1420 of the hydraulic rotary joint 142, and then flows from the oil outlet of the hydraulic rotary joint 142 through the first oil pipe 143 and the oil inlet 1413 into the cylinder block 1412 of the hydraulic cylinder 141, and pushes the piston to drive the piston rod 1411 to move outward from the cylinder block 1412, so that the protruding end of the piston rod 1411 abuts against the rotating shaft 131 and cooperates with the inner wall of the inner hole 120 of the second gear 12 to clamp the rotating shaft 131, realizing the synchronous rotation or synchronous stop of the second gear 12 and the rotating shaft 131. When braking is not required, the driving mechanism 15 stops operating, and the oil in the cylinder block 1412 flows back into the hydraulic rotary joint 142 from the oil return port 1414 through the first oil pipe 143 and the oil return port of the hydraulic rotary joint 142, so that the piston rod 1411 moves into the cylinder block 1412 under the action of elastic force and separates from the rotating shaft 131, realizing the independent rotation of the second gear 12. Of course, according to specific situations and requirements, in other embodiments of the present invention, the hydraulic cylinder 141 can be replaced by a pneumatic cylinder, the fluid medium can be gas or steam, and the locking mechanism 14 can also include an electric cylinder and a wireless driving component. The electric cylinder is electrically connected to the wireless driving component, and the wireless driving component can replace the hydraulic rotary joint 142 and the first oil pipe 143, which is not limited to this

[0055] Further, please refer to Figure 3 and Figure 4, in this embodiment, the locking mechanism 14 includes at least two hydraulic cylinders 141. The at least two hydraulic cylinders 141 are distributed equidistantly around the inner hole 120 of the second gear 12, and the axis of the piston rod 1411 of the hydraulic cylinder 141 is perpendicular to the axis of the rotating shaft 131. Specifically, the at least two hydraulic cylinders 141 are distributed equidistantly along the circumferential direction of the rotating shaft 131, and the piston rod 1411 can move reciprocally linearly along the radial direction of the second gear 12. When the braking execution system 1 operates, the at least two hydraulic cylinders 141 can cooperate with each other to clamp the end of the rotating shaft 131 extending into the inner hole 120, making the connection between the rotating shaft 131 and the second gear 12 more firm and reliable.

[0056] Further, please refer to Figure 4 and Figure 7 , in this embodiment, a groove 1311 is formed in the end of the rotating shaft 131, and the extended end of the piston rod 1411 of the hydraulic cylinder 141 can extend into the groove 1311 to form a positioning. Specifically, the cross-sectional profile of the groove 1311 is adapted to the cross-sectional profile of the extended end of the piston rod 1411. When the braking execution system 1 operates, the extended end of the piston rod 1411 can be inserted into the groove 1311, effectively preventing the extended end of the piston rod 1411 from sliding along the surface of the rotating shaft 131, ensuring that the locking mechanism 14 locks the rotating shaft 131 on the second gear 12.

[0057] Further, please refer to Figure 1 and Figure 3 , in this embodiment, the driving mechanism 15 includes a hydraulic pump 151 and a second oil pipe 152. Among them, one end of the second oil pipe 152 is communicated with the hydraulic pump 151, and the other end of the second oil pipe 152 is communicated with the hydraulic rotary joint 142. Specifically, the hydraulic pump 151 is a hydraulic component commonly used in the art to provide pressurized liquid for hydraulic transmission. When the braking execution system 1 operates, the hydraulic pump 151 sucks oil from the hydraulic oil tank, pressurizes the oil, then discharges the formed pressure oil from the second oil pipe 152. Then the pressure oil flows into the hydraulic rotary joint 142 through the connection port 1420 of the hydraulic rotary joint 142. Then the pressure oil flows from the oil outlet of the hydraulic rotary joint 142 through the first oil pipe 143 and the oil inlet 1413 into the cylinder block 1412 of the hydraulic cylinder 141, and pushes the piston to drive the piston rod 1411 to move out of the cylinder block 1412, so that the extended end of the piston rod 1411 abuts against the rotating shaft 131, realizing the locking of the rotating shaft 131. Of course, according to specific situations and requirements, in other embodiments of the present invention, the driving mechanism 15 can be a wireless transmitting end and can be coupled with the above-mentioned wireless driving assembly to start the above-mentioned electric cylinder, which is not uniquely limited here.

[0058] Further, please refer to Figure 6 and Figure 7, in this embodiment, the rotating shaft 131 includes a stop portion 1312 which protrudes from the surface of the rotating shaft 131. At the same time, the braking assembly 132 includes a cylinder body 1321, a first end cover 1322, a second end cover 1323, and an elastic mud (not shown). Among them, the first end cover 1322 seals one end of the cylinder body 1321, the second end cover 1323 seals the other end of the cylinder body 1321, and a sealing cavity 1320a is formed by enclosing the second end cover 1323, the first end cover 1322 and the cylinder body 1321. Here, the stop portion 1312 is accommodated in the sealing cavity 1320a, and there is a throttling gap 1320b between the stop portion 1312 and the cylinder body 1321, and the elastic mud is filled in the sealing cavity 1320a. Specifically, the stop portion 1312 protrudes radially outward from the surface of the body of the rotating shaft 131. When the rotating shaft 131 rotates, the stop portion 1312 will stir the elastic mud. There may be one, two or more stop portions 1312 on the rotating shaft 131. Two or more stop portions 1312 are distributed at intervals along the axial direction of the rotating shaft 131, and there are two positioning shoulders 1313 on the rotating shaft 131. The two positioning shoulders 1313 respectively abut against the inner end surfaces of the first end cover 1322 and the second end cover 1323 to limit the stop portion 1312 in the middle of the sealing cavity 1320a, so that the gaps between the opposite end surfaces of the stop portion 1312 and the inner end surfaces of the first end cover 1322 and the second end cover 1323 can be filled with the elastic mud, providing enough recovery space for the elastic mud. In this way, without an additional reset adjustment structure, the elastic mud can be instantaneously started in any state, that is, any stop position after the work is completed can be used as the starting position for the next work; the structure of the first end cover 1322 is the same as that of the second end cover 1323, that is, the first end cover 1322 and the second end cover 1323 can be made by the same mold, which is beneficial to improving the design and processing efficiency of the end cover and reducing the production cost of the braking assembly 132; here, the elastic mud is composed of polysiloxane, filler, compressive agent, plasticizer, etc. It is a commonly used high-viscosity, compressible, and flowable unvulcanized silicone compound in the field. It has high stability in the range of -80°C to 250°C, and is odorless, non-toxic, and pollution-free to the environment and personnel. It can consume energy and store energy according to the ratio required by the actual working conditions. When the elastic mud moves under the action of an external force, since the molecular chain segments and the entire molecular chain of polysiloxane need to overcome a large resistance during movement, extremely strong viscous friction can be generated, thereby absorbing the energy generated by the external force and converting part of the energy into heat energy, thus consuming the external energy and reducing the amplitude of vibration, that is, achieving the purpose of vibration reduction and buffering by generating a damping effect. In this way, the elastic mud will generate a low damping force when the stop portion 1312 rotates at a low speed and a high damping force when the stop portion 1312 rotates at a high speed, so that the rotary braking mechanism 13 can adapt to the working conditions of instantaneous emergency stops.

[0059] Further, please refer to Figure 2 and Figure 6 , in this embodiment, the opposite ends of the rotating shaft 131 respectively extend out of the sealing cavity 1320a from the first end cover 1322 and the second end cover 1323, and extend into the inner holes 120 of the two second gears 12. That is, one rotation braking mechanism 13 corresponds to two braking objects 2, and one rotation braking mechanism 13 can limit the rotation of the two braking objects 2 simultaneously. In this way, the braking process of the two braking objects 2 fixed on the same rotating shaft can be made smoother, which is beneficial to reducing the number of rotation braking mechanisms 13 provided, and reducing the production cost of the entire mobile device.

[0060] Further, please refer to Figures 6 to 8 , in this embodiment, the stop portion 1312 includes at least two blocking sub-bodies 13121, and the at least two blocking sub-bodies 13121 are circumferentially distributed at equal intervals. Specifically, the at least two blocking sub-bodies 13121 are circumferentially distributed at equal intervals on the surface of the rotating shaft 131 body, so that the external force transmitted by the rotating shaft 131 can be applied to the elastic clay more evenly, and then the damping force of the elastic clay can act on the blocking sub-bodies 13121 more evenly.

[0061] Further, please refer to Figure 7 and Figure 8, in this embodiment, a throttling hole 13122 is formed in the blocking part 13121, and the blocking part 13121 includes a first blocking surface 13121a and a second blocking surface 13121b which are oppositely arranged. The throttling hole 13122 extends from the first blocking surface 13121a to the second blocking surface 13121b. That is, the throttling hole 13122 penetrates through the first blocking surface 13121a and the second blocking surface 13121b for the elastic putty to flow through. Here, whether the first blocking surface 13121a pushes against the elastic putty when the rotating shaft 131 is driven by an external force to rotate clockwise, or the second blocking surface 13121b pushes against the elastic putty when the rotating shaft 131 is driven by an external force to rotate counterclockwise, the elastic putty will undergo elastic compression and generate a damping force at the throttling hole 13122 and the throttling gap 1320b. That is, when the flow rate of the elastic putty is accelerated instantaneously when flowing through the throttling hole 13122 and the throttling gap 1320b, the damping force at the throttling hole 13122 and the throttling gap 1320b will increase to absorb the energy generated by the external force. In this way, the throttling hole 13122 can cooperate with the throttling gap 1320b to increase the damping effect on the blocking part 13121, effectively improving the energy absorption and buffering effect of the elastic putty; specifically, the throttling hole 13122 extends along the cross-section perpendicular to the axis of the rotating shaft 131, so that the damping force generated when the elastic putty flows through the throttling hole 13122 always remains perpendicular to the axis of the rotating shaft 131, avoiding eccentric loading during the energy absorption process. The eccentric loading refers to a damping force that is not perpendicular to the axis of the rotating shaft 131 or cannot keep the rotating shaft 131 in a reverse rotation trend, resulting in the shaking of the rotating shaft 131 and accelerating the wear of the rotating shaft 131 and the first end cover 1322 and the second end cover 1323, thereby prolonging the service life of the rotary braking mechanism 13. In addition, the axis of the throttling hole 13122 is preferably straight or arc-shaped, that is, the throttling hole 13122 is a straight hole or an arc-shaped hole, which is beneficial to the production and processing of the throttling hole 13122 and can prevent the divergence of the damping force direction and the occurrence of eccentric loading.

[0062] Further, please refer to Figure 6, in this embodiment, the braking assembly 132 further includes a static sealing ring 1324 and a dynamic sealing ring 1325. Specifically, the static sealing ring 1324 is disposed around the joints between the first end cover 1322 and the cylinder 1321, and between the second end cover 1323 and the cylinder 1321. The dynamic sealing ring 1325 is disposed around the joints between the rotating shaft 131 and the first end cover 1322, and between the rotating shaft 131 and the second end cover 1323. Specifically, a first accommodation groove is formed on the outer surface of the first end cover 1322. The inner surface of the static sealing ring 1324 extends into the first accommodation groove and abuts against the groove wall of the first accommodation groove, and the outer surface of the static sealing ring 1324 abuts against the inner surface of the cylinder 1321. A second accommodation groove is formed on the outer surface of the second end cover 1323. The inner surface of the static sealing ring 1324 extends into the second accommodation groove and abuts against the groove wall of the second accommodation groove, and the outer surface of the static sealing ring 1324 abuts against the inner surface of the cylinder 1321. A first through hole is formed in the middle of the first end cover 1322, and a second through hole is formed in the middle of the second end cover 1323. The opposite ends of the rotating shaft 131 respectively pass through the first through hole and the second through hole. A third accommodation groove is formed on the hole wall of the first through hole. The outer surface of the dynamic sealing ring 1325 extends into the third accommodation groove and abuts against the groove wall of the third accommodation groove, and the inner surface of the dynamic sealing ring 1325 abuts against the outer surface of the rotating shaft 131. A fourth accommodation groove is formed on the hole wall of the second through hole. The outer surface of the dynamic sealing ring 1325 extends into the fourth accommodation groove and abuts against the groove wall of the fourth accommodation groove, and the inner surface of the dynamic sealing ring 1325 abuts against the outer surface of the rotating shaft 131. In this way, the leakage of the elastic sealant can be effectively prevented, and the sealing effect of the sealing cavity 1320a is ensured.

[0063] Embodiment Two:

[0064] Please refer to Figure 9 and Figure 10 , the braking execution system provided in this embodiment is basically the same as that in Embodiment One, except that: one end of the rotating shaft 131 extends out of the sealing cavity 1320a from the first end cover 1322 and extends into the inner hole 120 of the second gear 12. That is, the rotary braking mechanism 13 corresponds to the braking object 2 one by one, and one rotary braking mechanism 13 can only restrict the rotation of one braking object 2. In this way, the braking processes of multiple braking objects 2 are relatively independent, which is beneficial to reducing the mutual influence between multiple braking objects 2, improving the response speed of the braking object 2, and improving the adaptability of the mobile device under different working conditions.

[0065] The above are only optional embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and changes can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A brake actuation system, characterized in that: include: A first gear, used for connecting to a braking object; a second gear meshing with the first gear; A rotary brake mechanism, comprising a rotating shaft and a brake assembly, wherein the rotating shaft is rotatably connected to the brake assembly, an inner hole is opened in the middle of the second gear, one end of the rotating shaft is passed through the inner hole, and the axis of the rotating shaft and the axis of the second gear are in the same straight line, and the brake assembly is used to limit the rotation of the rotating shaft; A locking mechanism, disposed on the second gear, for locking the rotating shaft so that the second gear and the rotating shaft rotate or stop synchronously; as well as A driving mechanism, used for driving the locking mechanism; The locking mechanism comprises: A hydraulic cylinder, a piston rod of which can abut against the rotating shaft; A hydraulic rotary joint, used to connect the hydraulic cylinder and the driving mechanism; and a first oil pipe, one end of which is connected to the hydraulic cylinder, and the other end of which is connected to the hydraulic rotary joint; A groove is provided on the end of the rotating shaft, and the extended end of the piston rod of the hydraulic cylinder can be extended into the groove to form a positioning; The driving mechanism comprises: Hydraulic pumps; and A second oil pipe, one end of which is connected to the hydraulic pump, and the other end of which is connected to the hydraulic rotary joint.

2. The brake actuation system according to claim 1, characterized in that: The locking mechanism comprises at least two hydraulic cylinders, which are evenly spaced around the inner hole of the second gear, and the axes of the piston rods of the hydraulic cylinders are perpendicular to the axis of the rotating shaft.

3. The brake actuation system according to claim 1 or 2, characterized in that: The rotating shaft comprises a stopper, and the stopper is convexly arranged on the surface of the rotating shaft. The braking assembly comprises: Cylinder; A first end cover, sealing one end of the cylinder; A second end cover is sealed on the other end of the cylinder, the second end cover, the first end cover and the cylinder are enclosed to form a sealed cavity, the stopper is accommodated in the sealed cavity, and a throttling gap is formed between the stopper and the cylinder; and Elastic putty is filled in the sealing cavity.

4. The brake actuation system according to claim 3, characterized in that: The opposite ends of the rotating shaft extend out of the sealing cavity from the first end cover and the second end cover respectively, and extend into the inner holes of the two second gears.

5. The brake actuation system according to claim 3, characterized in that: One end of the rotating shaft extends out of the sealing cavity from the first end cover and extends into the inner hole of the second gear.

6. The brake actuation system according to claim 4 or 5, characterized in that: The stopper portion includes at least two blocking parts, and the at least two blocking parts are circumferentially distributed at equal intervals.

7. The brake actuation system according to claim 6, characterized in that: A throttling hole is provided on the blocking split body, and the blocking split body comprises a first blocking surface and a second blocking surface which are arranged opposite to each other, and the throttling hole extends from the first blocking surface to the second blocking surface.

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