Automobile parking lock system and automobile

Abstract

The present disclosure relates to a kind of automobile parking lock system and automobile, belong to the technical field of automobile safety device.The automobile parking lock system includes piston assembly, electric control locking assembly and parking assembly;Piston assembly includes piston cylinder, parking piston, piston rod and return spring, piston cylinder has first through hole, the wall surface of first through hole has second through hole, piston rod is slidably connected with first through hole, the side wall of piston rod has semispherical groove, electric control locking assembly includes locking piece, locking piece is slidably connected with second through hole, the end of locking piece close to first through hole has semispherical convex, parking assembly is connected with piston rod.Adopting the present disclosure, the service life of automobile parking lock system can be improved.

Description

Technical Field

[0001] This disclosure relates to the field of automotive safety device technology, and in particular to an automotive parking lock system and an automotive. Background Technology

[0002] The parking lock system is an important safety device in automobiles, used to ensure that the wheels are locked when the car is parked, preventing the car from rolling away.

[0003] Currently, such as Figure 1 As shown, a typical automotive parking lock system includes a piston assembly, an integrated electromagnet, and a parking assembly. The piston rod has a radially oriented circular through-hole, and a rolling element is rotatably connected to the circular through-hole. The end of the electromagnet push rod near the rolling element has a tapered structure. When the P gear needs to be released, the coil is energized to counteract the thrust of the permanent magnet on the electromagnet push rod. The hydraulic system pumps high-pressure oil, pushing the parking piston and piston rod upwards. The rolling element rotates along the outer contour of the tapered structure, pressing the electromagnet push rod into the housing of the integrated electromagnet. The upward movement of the piston rod causes the connecting rod to move upwards, and the connecting rod drives the parking pawl to disengage from the parking wheel, thus releasing the P gear. After the parking pawl disengages from the parking wheel, the coil is de-energized, the permanent magnet pushes the electromagnet push rod out of the housing, the hydraulic system stops pumping high-pressure oil, and the electromagnet push rod, through the rolling element, limits the piston rod, keeping the parking pawl disengaged from the parking wheel and maintaining the P gear released. When it is necessary to engage P gear, the coil is energized to counteract the thrust of the permanent magnet on the electromagnet push rod. The return spring pulls down the piston rod, and the rolling element rotates along the outer contour of the conical structure, pressing the electromagnet push rod into the housing of the integrated electromagnet. The piston rod moves down, causing the connecting rod to move down, and the connecting rod drives the parking pawl to contact the parking wheel, thus engaging P gear.

[0004] However, the applicant found that the current car parking lock system has at least the following problems: the piston rod has a circular through hole in the radial direction for rotating the rolling element, which results in low strength of the piston rod and easy deformation, making the piston rod need to be repaired or replaced frequently, resulting in high costs. Summary of the Invention

[0005] This disclosure provides a vehicle parking lock system and a vehicle, which can solve the technical problems existing in related technologies. The technical solution is as follows:

[0006] In a first aspect, embodiments of this disclosure provide a vehicle parking lock system, the vehicle parking lock system including a piston assembly, an electronically controlled locking assembly, and a parking assembly;

[0007] The piston assembly includes a piston cylinder, a parking piston, a piston rod, and a return spring. The piston cylinder has a cylindrical structure with one open end, which is connected to the vehicle's hydraulic system. The cylindrical structure has a cavity inside, and the bottom of the cylindrical structure has a first through hole for connecting the cavity to the outside of the cavity. The side wall of the first through hole has a second through hole for connecting the first through hole to the outside of the first through hole. The parking piston is located inside the cavity and is slidably connected to the cavity. The piston rod is located inside the first through hole and is slidably connected to the first through hole. One end of the piston rod is connected to the parking piston. The side wall of the piston rod has a hemispherical groove. When the parking piston is in a first position, the hemispherical groove is coaxial with the second through hole. The return spring is located inside the cavity, and its two ends are connected to the parking piston and the bottom of the cylindrical structure, respectively.

[0008] The electrically controlled locking assembly includes a magnetic push assembly and a locking member. The magnetic push assembly includes a permanent magnet and a first coil. The permanent magnet is located inside the second through hole and is fixedly connected to the second through hole. The first coil is looped around the permanent magnet and connected to the permanent magnet. The locking member is located inside the second through hole and is located on the side of the permanent magnet closer to the first through hole, and is slidably connected to the second through hole. The end of the locking member away from the magnetic push assembly has a hemispherical protrusion. The end of the permanent magnet close to the first through hole and the end of the locking member away from the first through hole have the same magnetism. When the first coil is energized, the end of the first coil close to the first through hole and the end of the locking member away from the first through hole have different magnetisms. At the position of the end of the locking member away from the first through hole, the magnetic field strength generated by the first coil is equal to the magnetic field strength generated by the permanent magnet.

[0009] Alternatively, the inner wall of the second through hole has a limiting protrusion, the magnetic push assembly includes a second coil, the second coil is located inside the second through hole and on the side of the limiting protrusion away from the first through hole, and is fixedly connected to the second through hole, the locking member is located inside the second through hole and on the side of the limiting protrusion close to the first through hole, and is slidably connected to the second through hole, the end of the locking member away from the magnetic push assembly has a hemispherical protrusion, when the second coil carries a current in a first direction, the end of the second coil close to the first through hole and the end of the locking member away from the first through hole have the same magnetism, when the second coil carries a current in a second direction, the end of the second coil close to the first through hole and the end of the locking member away from the first through hole have opposite magnetism, wherein the second direction is the opposite of the first direction;

[0010] The parking assembly is connected to the other end of the piston rod. When the parking piston is in the first position, the parking assembly is separated from the vehicle parking wheel. When the parking piston is between the opening and the first position, the parking assembly is engaged with the vehicle parking wheel.

[0011] In one possible implementation, both the surface of the first coil and the surface of the second coil have an insulating layer.

[0012] In one possible implementation, when the magnetic pusher includes a permanent magnet and a first coil, the locking member has a reference gap with the first coil at one end near the first coil.

[0013] In one possible implementation, when the magnetic pusher includes a second coil, the locking member has a reference gap with the second coil at one end near the second coil.

[0014] In one possible implementation, both the surface with the hemispherical groove and the surface with the hemispherical protrusion have a nitriding layer.

[0015] In one possible implementation, the locking element includes a body and a hemispherical protrusion, the body and the hemispherical protrusion being integrally formed.

[0016] In one possible implementation, the body has a cylindrical structure, the second through hole is a circular through hole, and the side wall of the body and the inner wall of the second through hole are in a transition fit.

[0017] In one possible implementation, the permanent magnet is a neodymium magnet, a samarium cobalt magnet, an alnico magnet, or a ferrite magnet.

[0018] In one possible implementation, the vehicle parking lock system further includes a sealing ring;

[0019] The sealing ring is located between the side wall of the parking piston and the inner wall of the piston cylinder, and is connected to the side wall of the parking piston.

[0020] Secondly, embodiments of this disclosure provide a vehicle that includes the vehicle locking system described in the first aspect and its possible implementations.

[0021] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0022] This disclosure provides an automotive parking locking system. In this system, the piston rod sidewall has a hemispherical groove, and the locking component surface has a hemispherical protrusion. The engagement between the hemispherical groove on the piston rod and the hemispherical protrusion on the locking component allows for limiting the piston rod's position, controlling the parking pawl to separate from or engage with the parking wheel. Thus, compared to a piston rod with a through hole in the radial direction, a piston rod with a hemispherical groove on its sidewall has higher strength and is less prone to deformation under stress, thereby extending the service life of the automotive parking locking system.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an automotive locking system shown in an embodiment of this disclosure;

[0026] Figure 2 This is a schematic diagram of the structure of an automotive locking system shown in an embodiment of this disclosure;

[0027] Figure 3 This is a schematic diagram of the structure of an automotive locking system shown in an embodiment of this disclosure;

[0028] Figure 4 This is a schematic diagram of the structure of a parking assembly shown in an embodiment of this disclosure;

[0029] Figure 5 This is a schematic diagram of the structure of a parking assembly shown in an embodiment of this disclosure;

[0030] Figure 6 This is a schematic diagram of the structure of a locking member shown in an embodiment of this disclosure.

[0031] Legend

[0032] 1. Piston assembly;

[0033] 11. Piston cylinder; 12. Parking piston; 13. Piston rod; 14. Return spring;

[0034] 11a. Cavity; 11b. First through hole; 11c. Second through hole; 11d. Limiting protrusion; 13a. Hemispherical groove;

[0035] 2. Electrically controlled locking assembly;

[0036] 21. Magnetic push assembly; 22. Locking component;

[0037] 211. Permanent magnet; 212. First coil; 213. Second coil; 22a. Hemispherical protrusion; 22m. Body;

[0038] 3. Parking assembly;

[0039] 31. Pivot; 32. Parking pawl; 33. Torsion spring; 34. Connecting rod;

[0040] 321. First sidewall; 322. Second sidewall; 331. First end of torsion spring; 332. Second end of torsion spring; 341. First end of connecting rod; 342. Second end of connecting rod;

[0041] 321a, First cone-shaped structure; 322b, Parking protrusion; 331a, First branch; 331b, Second branch;

[0042] 342b, Second cone-shaped structure;

[0043] 4. Sealing ring. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0045] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent disclosure and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0046] This disclosure provides an embodiment of an automotive parking lock system, such as... Figure 2As shown, the vehicle parking lock system includes a piston assembly 1, an electronically controlled locking assembly 2, and a parking assembly 3.

[0047] The piston assembly 1 includes a piston cylinder 11, a parking piston 12, a piston rod 13, and a return spring 14. The electronically controlled locking assembly 2 includes a magnetic push assembly 21 and a locking element 22. The parking assembly 3 includes a pivot 31, a parking pawl 32, a torsion spring 33, and a connecting rod 34.

[0048] The following is a detailed introduction to each component of the car parking lock system:

[0049] I. Piston Assembly 1

[0050] Piston assembly 1 is a component in the vehicle parking lock system used to move via hydraulically controlled linkage 34.

[0051] Piston cylinder 11

[0052] Piston cylinder 11 is a component in piston assembly 1 used to house parking piston 12, piston rod 13 and return spring 14.

[0053] like Figure 2 As shown, the piston cylinder 11 has a cylindrical structure with one end open.

[0054] The outer wall of the piston cylinder 11 can have a cubic structure or a cylindrical structure. The interior of the piston cylinder 11 has a cavity 11a, which is used to accommodate the parking piston 12, the piston rod 13 and the return spring 14.

[0055] The cavity 11a can have a cubic structure or a cylindrical structure. The shape of the opening of the cylindrical structure is the same as the cross-section of the cavity. When the cavity 11a has a cubic structure, the opening is rectangular, and when the cavity 11a has a cylindrical structure, the opening is circular.

[0056] The opening of piston cylinder 11 is used to connect to the automotive hydraulic system.

[0057] For example, the inner wall of the opening can engage with the outer wall of the automotive hydraulic system.

[0058] This improves the connection stability between the opening of piston cylinder 11 and the automotive hydraulic system.

[0059] like Figure 2 As shown, the piston cylinder 11 has a first through hole 11b at the bottom of the cylinder. The first through hole 11b penetrates the inner wall and the outer wall of the cylinder bottom and is used to connect the cavity 11a with the outside of the piston cylinder 11. The side wall of the first through hole 11b has a second through hole 11c, which is used to connect the first through hole 11b with the outside of the first through hole 11b.

[0060] Optionally, the axis of the second through hole 11c may be located in the same plane as the axis of the first through hole 11b and perpendicular to the axis of the first through hole 11b.

[0061] This reduces the machining difficulty of the first through hole 11b and the second through hole 11c.

[0062] Optionally, the second through hole 11c may have a limiting protrusion 11d in the middle.

[0063] For example, the limiting protrusion 11d can be a columnar protrusion or an annular protrusion. The shape of the limiting protrusion 11d is not limited in the embodiments of this disclosure.

[0064] Optionally, the cross-sectional shapes of the first through hole 11b and the second through hole 11c can be the same.

[0065] For example, the cross-sectional shape of the first through hole 11b and the second through hole 11c can both be circular, or both can be rectangular.

[0066] Optionally, the cross-sectional shapes of the first through hole 11b and the second through hole 11c may be different.

[0067] For example, the cross-sectional shape of the first through hole 11b can be circular, and the cross-sectional shape of the second through hole 11c can be rectangular; or, the cross-sectional shape of the first through hole 11b can be rectangular, and the cross-sectional shape of the second through hole 11c can be circular.

[0068] Parking piston 12

[0069] The parking piston 12 is a component in piston assembly 1 used to push the piston rod 13.

[0070] like Figure 2 As shown, the parking piston 12 has a plate-like structure, and the shape of the parking piston 12 matches the shape of the opening of the cavity 11a. The parking piston 12 is located in the cavity 11a and is slidably connected to the inner wall of the piston cylinder 11.

[0071] The parking piston 12 is connected to the piston rod 13 and the return spring 14 at one end near the bottom of the piston rod 11, and the other end is used to connect to the automotive hydraulic system.

[0072] Alternatively, the connection between the parking piston 12, the piston rod 13, and the return spring 14 can be welding.

[0073] This improves the connection stability between the parking piston 12, piston rod 13, and return spring 14.

[0074] Piston rod 13

[0075] Piston rod 13 is a component in piston assembly 1 used to move parking assembly 3.

[0076] like Figure 2 As shown, the piston rod 13 has a rod-shaped structure, and its two ends are connected to the parking piston 12 and the parking assembly 3, respectively. A portion of the piston rod 13 is located in the first through hole 11b and is slidably connected to the first through hole 11b.

[0077] The cross-sectional shape of the piston rod 13 matches the cross-sectional shape of the first through hole 11b.

[0078] Optionally, the piston rod 13 and the first through hole 11b can be a transition fit.

[0079] In practice, the piston rod 13 needs to slide frequently in the first through hole 11b. Setting the fit between the piston rod 13 and the first through hole 11b as a transition fit can improve the service life of the piston rod 13.

[0080] like Figure 2 As shown, the sidewall of the piston rod 13 has a hemispherical groove 13a.

[0081] When the parking piston 12 is in the first position, the hemispherical groove 13a is coaxial with the second through hole 11c.

[0082] In this way, when the parking piston 12 is in the first position, the electronic locking assembly 2 can extend out of the second through hole 11c and enter into the hemispherical groove 13a, engaging with the hemispherical groove 13a, thereby limiting the piston rod 13.

[0083] Optionally, the surface of the hemispherical groove 13a may have a nitrided layer.

[0084] This can improve the fatigue strength of the hemispherical groove 13a, thereby increasing its service life.

[0085] Return spring 14

[0086] The return spring 14 is a component in piston assembly 1 used to pull the parking piston 12.

[0087] like Figure 2 As shown, the return spring 14 is located in the cavity 11a, and the two ends of the return spring 14 are connected to the bottom of the parking piston 12 and the piston cylinder 11, respectively.

[0088] When the parking piston 12 is in the open position of the piston cylinder 11, the return spring 14 is in the natural state. As the parking piston 12 slides from the open to the bottom of the cylinder, the return spring 14 is gradually compressed. When the thrust generated by the automotive hydraulic system disappears, the return spring 14 can push the parking piston 12 to slide away from the bottom of the cylinder.

[0089] II. Electrically Controlled Locking Component 2

[0090] The electronically controlled locking assembly 2 is a component of the locking system used to limit the movement of the piston rod 13.

[0091] like Figure 2 As shown, the electronically controlled locking assembly 2 includes a magnetic push assembly 21 and a locking element 22.

[0092] The electronically controlled locking assembly 2 can include two structures, which will be described in detail below.

[0093] Structure 1:

[0094] The magnetic propulsion assembly 21 includes a permanent magnet 211 and a first coil 212.

[0095] Permanent magnet 211

[0096] The permanent magnet 211 is a component in the magnetic thrust assembly 21 that generates a magnetic field when no power is applied, so as to exert a force on the locking member 22.

[0097] like Figure 2 As shown, the permanent magnet 211 has a columnar structure and is located in the second through hole 11c.

[0098] The permanent magnet 211 is fixedly connected to the inner wall of the second through hole 11c. For example, the connection between the permanent magnet 211 and the inner wall of the second through hole 11c can be by bonding.

[0099] This reduces the connection cost between the permanent magnet 211 and the inner wall of the second through hole 11c.

[0100] The permanent magnet 211 can be a neodymium magnet, a samarium cobalt magnet, an alnico magnet, or a ferrite magnet. The present disclosure does not limit the type of permanent magnet 211.

[0101] First coil 212

[0102] The first coil 212 is a component in the magnetic propulsion assembly 21 used to generate a magnetic field by energizing it, so as to counteract the magnetic field generated by the permanent magnet 211.

[0103] like Figure 2 As shown, the first coil 212 is looped around the permanent magnet 211 and connected to the permanent magnet 211.

[0104] When the first coil 212 is energized, at the end of the locking member 22 away from the first through hole 11b, the magnetic field strength generated by the end of the first coil 212 near the first through hole 11b is equal to that of the end of the permanent magnet 22 near the first through hole 11b.

[0105] Optionally, the surface of the first coil 212 may have an insulating layer.

[0106] This prevents leakage when the first coil 212 comes into contact with metal parts, thus improving the safety of the locking system.

[0107] Optionally, the equivalent length of the first coil 212 can be equal to the length of the permanent magnet 211, and can cover the permanent magnet 211.

[0108] In practice, the two ends of the permanent magnet 211 have opposite magnetic properties. Current can flow through the first coil 212. According to the magnetic effect of current, the first coil 212 can generate a magnetic field at its end. Therefore, the magnitude and direction of the current flowing through the first coil 212 can be adjusted according to actual needs, so that at the end of the locking member 22 away from the first through hole 11b, the magnetic field strength generated by the end of the first coil 212 near the first through hole 11b is equal to that of the end of the permanent magnet 22 near the first through hole 11b.

[0109] In this way, when the first coil 212 is energized, it can cancel the magnetic field generated by the permanent magnet 22 at one end near the first through hole 11b, so that the locking member 22 is not affected by the force of the magnetic field.

[0110] Locking component 22

[0111] The locking element 22 is a component in the electronically controlled locking assembly 2 used to engage with the piston rod 13 to limit the movement of the piston rod 13. The locking element 22 is a magnetic component.

[0112] like Figure 2 As shown, the locking member 22 is located inside the second through hole 11c and is located on the side of the permanent magnet 211 near the first through hole 11b, and is slidably connected to the second through hole 11c.

[0113] Optionally, the locking member 22 has a reference gap between the end near the first coil 212 and the first coil 212.

[0114] For example, the reference gap value can be 1.0 mm.

[0115] In practice, the locking element 22 is in the second through hole 11c and never comes into contact with the first coil 212.

[0116] This prevents the locking element 22 from short-circuiting when energized.

[0117] like Figure 2 As shown, the locking member 22 has a hemispherical protrusion 22a at one end near the first through hole 11b, and the radius of the hemispherical protrusion 22a is equal to the radius of the hemispherical groove 13a.

[0118] Optionally, the surface of the hemispherical protrusion 22a may have a nitrided layer.

[0119] This can extend the service life of the locking component 22.

[0120] The locking component 22 is a magnetic component, and the end of the locking component 22 near the permanent magnet 211 has the same magnetism as the end of the permanent magnet 211 near the locking component 22.

[0121] In practice, when no current flows through the first coil 212, the locking member 22 slides away from the permanent magnet 211 under the influence of the magnetic field generated at the end of the permanent magnet 211 near the first through hole 11b. When the locking member 22 slides to its limit position, the hemispherical protrusion 22a engages with the hemispherical groove 13a, limiting the piston rod 13. When current flows through the first coil 212, the magnetic field generated at the end of the locking member 22 away from the first through hole 11b is different from the magnetic field at the end of the locking member 22 away from the first through hole 11b, and is equal in strength to the magnetic field generated by the permanent magnet 211 at the end of the locking member 22 away from the first through hole 11b. Therefore, the resultant force of the magnetic field on the locking member 22 is 0. Meanwhile, since the locking member 22 has a hemispherical protrusion 22a at one end near the first through hole 11b, the hemispherical groove 13a exerts a force on the hemispherical protrusion 22a in the direction of the second through hole 11c pointing towards the permanent magnet 211, which can push the locking member 22 to slide towards the permanent magnet 211. When the hemispherical protrusion 22a completely disengages from the hemispherical groove 13a, the locking member 22 no longer has a limiting effect on the piston rod 13, and the piston rod 13 slides towards the opening under the pulling force of the return spring 14.

[0122] Structure 2:

[0123] The magnetic propulsion assembly 21 includes only the second coil 213.

[0124] Second coil 213

[0125] The second coil 213 is a component that generates a magnetic field in the magnetic push assembly 21 to exert a force on the locking member 22.

[0126] like Figure 3 As shown, the second coil 213 is located in the second through hole 11c, and is located on the side of the limiting protrusion 11d away from the original first through hole 11b, and is fixedly connected to the second through hole 11c.

[0127] For example, the connection between the second coil 213 and the inner wall of the second through hole 11c can be by bonding.

[0128] This reduces the connection cost between the second coil 213 and the inner wall of the second through hole 11c.

[0129] Optionally, the surface of the second coil 213 may have an insulating layer.

[0130] This prevents leakage when the second coil 213 comes into contact with metal parts, thus improving the safety of the locking system.

[0131] In practice, current can flow through the second coil 213. According to the magnetic effect of current, the second coil 213 can generate a magnetic field at its end. Therefore, the magnitude and direction of the current flowing through the second coil 213 can be adjusted according to actual needs, so that the magnetism of the end of the second coil 213 near the first through hole 11b is the same as the magnetism of the end of the locking member 22 away from the first through hole 11b.

[0132] Thus, when the second coil 213 is energized, according to the principle of like poles repelling each other, the second coil 213 can push the locking member 22 to slide towards the first through hole 11b. When the second coil 213 is not energized, the second coil 213 does not generate a magnetic field and has no force on the locking member 22.

[0133] Locking component 22

[0134] The locking element 22 is a component in the electronically controlled locking assembly 2 used to engage with the piston rod 13 to limit the movement of the piston rod 13. The locking element 22 is a magnetic component.

[0135] like Figure 3 As shown, the locking member 22 is located inside the second through hole 11c and is located on the side of the limiting protrusion 11d close to the first through hole 11b, and is slidably connected to the second through hole 11c.

[0136] Optionally, the locking member 22 has a reference gap with the second coil 213 at one end near the second coil 213.

[0137] For example, the reference gap value can be 1.0 mm.

[0138] In practice, the locking element 22 is in the second through hole 11c and never contacts the second coil 213.

[0139] This prevents the locking element 22 from short-circuiting when energized.

[0140] like Figure 3 As shown, the locking member 22 has a hemispherical protrusion 22a at one end near the first through hole 11b, and the radius of the hemispherical protrusion 22a is equal to the radius of the hemispherical groove 13a.

[0141] Optionally, the surface of the hemispherical protrusion 22a may have a nitrided layer.

[0142] This can extend the service life of the locking component 22.

[0143] The locking component 22 is a magnetic component, and the end of the locking component 22 near the permanent magnet 211 has the same magnetism as the end of the permanent magnet 211 near the locking component 22.

[0144] In practice, when no current flows through the second coil 213, the second coil 213 exerts no force on the locking member 22. When current flows through the second coil 213, under the influence of the magnetic field generated at the end of the second coil 213 near the first through hole 11b, the locking member 22 slides towards the first through hole 11b. When the locking member 22 slides to its limit position, the hemispherical protrusion 22a engages with the hemispherical groove 13a, limiting the piston rod 13. Meanwhile, since the locking member 22 has a hemispherical protrusion 22a at the end near the first through hole 11b, the hemispherical groove 13a exerts a force on the hemispherical protrusion 22a in the direction away from the first through hole 11b along the second through hole 11c, which can push the locking member 22 to slide toward the third coil 213. When the hemispherical protrusion 22a completely disengages from the hemispherical groove 13a, the locking member 22 no longer has a limiting effect on the piston rod 13, and the piston rod 13 slides toward the opening under the pulling force of the return spring 14.

[0145] Compared to an integrated parking electromagnet, the electronically controlled locking assembly 2 only requires a coil (first coil 212 or second coil 213), a permanent magnet 211, and a locking element 22 to limit the piston rod. This results in a simpler structure and higher stability. For example, due to its simpler structure, the electronically controlled locking assembly 2 is less prone to failure in low-temperature environments and exhibits more stable performance. Furthermore, compared to an integrated parking electromagnet, the coil, permanent magnet, and locking element do not need to be integrated, simplifying the assembly process and reducing costs.

[0146] III. Parking Components 3

[0147] Parking assembly 3 is a component in the locking system used to limit the parking wheels of a vehicle.

[0148] like Figure 2 As shown, the parking assembly 3 includes a pivot 31, a parking pawl 32, a torsion spring 33, and a connecting rod 34.

[0149] Pivot 31

[0150] Pivot 31 is a component in parking assembly 3 used to fix torsion spring 33.

[0151] like Figure 2 As shown, the pivot 31 has a cylindrical structure, and both ends of the pivot 31 are fixedly connected to the car body.

[0152] Parking Pad 32

[0153] The parking pawl 32 is a component in the parking assembly 3 used to limit the parking wheel of the vehicle.

[0154] like Figure 2 As shown, the parking pawl 32 has a plate-like structure, is perpendicular to the pivot 31, and is rotatably connected to the pivot 31.

[0155] like Figure 2 (Main view) and Figure 4 As shown in the side view, the first sidewall 321 of the parking pawl 32 has a first conical structure 321a, and the second sidewall 322 of the parking pawl 32 has a parking protrusion 322b.

[0156] The first sidewall 321 and the second sidewall 322 are two sidewalls of the parking pawl 32 that are opposite each other in the direction of rotation. The first sidewall 321 is the sidewall away from the parking wheel of the car, and the second sidewall 322 is the sidewall close to the parking wheel of the car.

[0157] When the parking piston 12 is in the first position, the parking protrusion 322b is separated from the vehicle parking wheel. When the parking piston 12 is between the opening and the first position, the parking protrusion 322b is engaged with the vehicle parking wheel.

[0158] In this way, the engagement or disengagement of the parking protrusion 322b with the vehicle parking wheel can be controlled by controlling the position of the parking piston 12 in the piston cylinder 11.

[0159] Torsion spring 33

[0160] The torsion spring 33 is a component in the parking assembly 3 that works in conjunction with the connecting rod 34 to control the rotation of the parking pawl 32.

[0161] like Figure 2 As shown, the torsion spring 33 has a cylindrical structure and is looped around the pivot 31. The torsion spring 33 includes a first end 331 and a second end 332.

[0162] Optionally, the inner wall of the torsion spring 33 and the outer wall of the pivot 31 can be clearance fit.

[0163] Optionally, such as Figure 2 As shown, the first end 331 of the torsion spring 33 may have a first branch 331a and a second branch 331b.

[0164] The first branch 331a is connected to the first side wall 321, and the second branch 331b is connected to the second side wall 322. The first branch 331a and the second branch 331b are used to clamp and fix the parking pawl 32.

[0165] This improves the connection stability between the torsion spring 33 and the parking pawl 32.

[0166] In practice, when the first end 331 and the second end 332 of the torsion spring 33 rotate relative to each other, the inner diameter of the torsion spring 33 will shrink. Setting the inner wall of the torsion spring 33 and the outer wall of the pivot 31 as a clearance fit can prevent the torsion spring 33 from making marks on the pivot 31.

[0167] The torsion spring 33 includes a first end 331 and a second end 332. The first end 331 of the torsion spring 33 is connected to the second side wall 322, and the second end 332 of the torsion spring 33 is connected to the vehicle body. The elastic force of the torsion spring 33 on the parking pawl 32 is directed from the second side wall 322 to the first side wall 321.

[0168] For example, the connection between the first end 331 of the torsion spring 33 and the second sidewall 322 can be by bonding.

[0169] This reduces the connection cost between the first end 331 of the torsion spring 33 and the second sidewall 322.

[0170] In practice, the spring force of the torsion spring 33 on the parking pawl 32 is directed from the second side wall 322 to the first side wall 321. Without the participation of external force, the parking protrusion 322b of the parking pawl 32 is always engaged with the parking wheel of the car.

[0171] Link 34

[0172] Link 34 is a component in the parking assembly 3 that works in conjunction with torsion spring 33 to control the rotation of parking pawl 32.

[0173] like Figure 2 As shown, the connecting rod 34 includes a first end 341 and a second end 342. The connecting rod 34 has a bent portion, and the first end 341 and the second end 342 are connected through the bent portion.

[0174] The first end 341 of the connecting rod 34 is connected to the end of the piston rod 13 away from the parking piston 12, and the second end 342 of the connecting rod 34 has a second conical structure 342b, which is in contact with the first conical structure 321a.

[0175] When the second conical structure 342b moves upward, the parking pawl 32 rotates toward the first sidewall 321.

[0176] In practice, when the parking piston 12 pushes the piston rod 13 upward, reference Figure 5 The second conical structure 342b moves upward, the parking pawl 32 rotates towards the first sidewall 321, and the parking protrusion 322b can separate from the vehicle parking wheel. When the return spring 14 pulls the parking piston 12 downward, the piston rod 13 moves downward, as shown in the reference. Figure 4The second cone-shaped structure 342b moves downward, the parking pawl 32 rotates toward the second side wall 322, and the parking protrusion 322b can engage with the car parking wheel.

[0177] Optionally, the first end 341 of the connecting rod 34 is detachably connected to the end of the piston rod 13 away from the parking piston 12.

[0178] The following describes some optional structural features of the locking system:

[0179] Structural feature 1: The locking component 22 can be a one-piece molded part.

[0180] like Figure 6 As shown, the locking member 22 includes a body 22m and a hemispherical protrusion 22a, which are integrally formed.

[0181] This can improve the overall strength of the locking component 22.

[0182] The locking component 22 can be manufactured by stamping, cutting, or casting. This embodiment does not limit the manufacturing process of the locking component 22.

[0183] For example, the locking member 22 can be manufactured by stamping.

[0184] This reduces the processing cost of the locking component 22.

[0185] Structural Feature 2: The fit between the locking element 22 and the second through hole 11c can be a transition fit.

[0186] like Figure 6 As shown, the body 22m can have a cylindrical structure. Correspondingly, the second through hole 11c can be a circular through hole, and the outer wall of the body 22m and the inner wall of the through hole 11c can be a transition fit.

[0187] This improves the sliding efficiency of the locking member 22 in the second through hole 11c.

[0188] Structural feature 3: The locking system may also include a sealing ring 4.

[0189] like Figure 2 As shown, the sealing ring 4 has an annular structure. The sealing ring 4 is located between the side wall of the parking piston 12 and the inner wall of the piston rod 11, and is connected to the side wall of the parking piston 12.

[0190] The material of the sealing ring 4 can be corrosion-resistant rubber or polyvinyl chloride. This embodiment does not limit the material of the sealing ring 4.

[0191] For example, the side wall of the parking piston 12 may have a sealing ring mounting groove, which is an annular groove for accommodating the sealing ring 4.

[0192] This can extend the service life of sealing ring 4.

[0193] The above optional structural features can be used individually or in combination.

[0194] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0195] This disclosure provides an automotive parking locking system in which the piston rod 13 has a hemispherical groove 13a on its sidewall and a hemispherical protrusion 22a on its surface. The engagement between the hemispherical groove 13a and the hemispherical protrusion 22a allows for the limiting of the piston rod 13, controlling the separation or engagement of the parking pawl 32 with the parking wheel. Thus, compared to a through hole in the radial direction of the piston rod, the piston rod 13 with the hemispherical groove 13a on its sidewall has higher strength and is less prone to deformation under stress, thereby extending the service life of the automotive parking locking system.

[0196] This disclosure provides an automobile that includes the aforementioned automobile locking system.

[0197] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A vehicle parking lock system, characterized in that, The vehicle parking lock system includes a piston assembly (1), an electronically controlled locking assembly (2), and a parking assembly (3). The piston assembly (1) includes a piston cylinder (11), a parking piston (12), a piston rod (13), and a return spring (14). The piston cylinder (11) has a cylindrical structure with one open end, the opening being connected to the vehicle's hydraulic system. The cylindrical structure has a cavity (11a) inside, and the bottom of the cylindrical structure has a first through hole (11b) for connecting the cavity (11a) and the outside of the cavity (11a). The sidewall of the first through hole (11b) has a second through hole (11c) for connecting the first through hole (11b) and the outside of the first through hole (11b). The parking piston (12) Located within the cavity (11a) and slidably connected to the cavity (11a), the piston rod (13) is partially located within the first through hole (11b) and slidably connected to the first through hole (11b). One end of the piston rod (13) is connected to the parking piston (12). The side wall of the piston rod (13) has a hemispherical groove (13a). When the parking piston (12) is in the first position, the hemispherical groove (13a) is coaxial with the second through hole (11c). The return spring (14) is located within the cavity (11a). The two ends of the return spring (14) are respectively connected to the parking piston (12) and the bottom of the cylindrical structure. The electronically controlled locking assembly (2) includes a magnetic push assembly (21) and a locking element (22). The magnetic drive assembly (21) includes a permanent magnet (211) and a first coil (212). The permanent magnet (211) is located inside the second through hole (11c) and is fixedly connected to the second through hole (11c). The first coil (212) is looped around the permanent magnet (211) and connected to the permanent magnet (211). The locking member (22) is located inside the second through hole (11c) and is located on the side of the permanent magnet (211) closer to the first through hole (11b), and is slidably connected to the second through hole (11c). The end of the locking member (22) away from the magnetic drive assembly (21) has a... There is a hemispherical protrusion (22a). The end of the permanent magnet (211) near the first through hole (11b) has the same magnetism as the end of the locking member (22) away from the first through hole (11b). When the first coil (212) is energized, the end of the first coil (212) near the first through hole (11b) has different magnetism from the end of the locking member (22) away from the first through hole (11b). At the position of the end of the locking member (22) away from the first through hole (11b), the magnetic field strength generated by the first coil (212) is equal to the magnetic field strength generated by the permanent magnet (211). Alternatively, the inner wall of the second through hole (11c) has a limiting protrusion (11d), the magnetic push assembly (21) includes a second coil (213), the second coil (213) is located in the second through hole (11c), and is located on the side of the limiting protrusion (11d) away from the first through hole (11b), and is fixedly connected to the second through hole (11c), the locking member (213) is located in the second through hole (11c), and is located on the side of the limiting protrusion (11d) close to the first through hole (11b), and is slidably connected to the second through hole (11c), the locking member (213) is located in the second through hole (11c), and is located on the side of the limiting protrusion (11d) close to the first through hole (11b), the locking member (213) is slidably connected to the second through hole (11c), the locking member (213) is slidably connected to the second through hole (11c), the second through hole (11d ... 2) The end away from the magnetic push assembly (21) has a hemispherical protrusion (22a). When the second coil (213) carries a current in the first direction, the end of the second coil (213) near the first through hole (11b) has the same magnetism as the end of the locking member (22) away from the first through hole (11b). When the second coil (213) carries a current in the second direction, the end of the second coil (213) near the first through hole (11b) has different magnetism from the end of the locking member (22) away from the first through hole (11b). The second direction is the opposite of the first direction. The parking assembly (3) is connected to the other end of the piston rod (13). When the parking piston (12) is in the first position, the parking assembly (3) is separated from the car parking wheel. When the parking piston (12) is between the opening and the first position, the parking assembly (3) is engaged with the car parking wheel.

2. The vehicle parking lock system according to claim 1, characterized in that, The surfaces of the first coil (212) and the second coil (213) both have an insulating layer.

3. The vehicle parking lock system according to claim 1, characterized in that, When the magnetic thrust assembly (21) includes a permanent magnet (211) and a first coil (212), the locking member (22) has a reference gap with the first coil (212) at one end near the first coil (212).

4. The vehicle parking lock system according to claim 1, characterized in that, When the magnetic push assembly (21) includes a second coil (213), the locking member (22) has a reference gap with the second coil (213) at one end near the second coil (213).

5. The vehicle parking lock system according to claim 1, characterized in that, Both the surface with the hemispherical groove (13a) and the surface with the hemispherical protrusion (22a) have a nitriding layer.

6. The vehicle parking lock system according to claim 1, characterized in that, The locking member (22) includes a body (22m) and a hemispherical protrusion (22a), which are integrally formed.

7. The vehicle parking lock system according to claim 6, characterized in that, The body (22m) has a cylindrical structure, the second through hole (11c) is a circular through hole, and the side wall of the body (22m) and the inner wall of the second through hole (11c) are in transition fit.

8. The vehicle parking lock system according to claim 1, characterized in that, The permanent magnet (211) is a neodymium magnet, a samarium cobalt magnet, an alnico magnet or a ferrite magnet.

9. The vehicle parking lock system according to any one of claims 1 to 8, characterized in that, The vehicle parking lock system also includes a sealing ring (4); The sealing ring (4) is located between the side wall of the parking piston (12) and the inner wall of the piston cylinder (11), and is connected to the side wall of the parking piston (12).

10. A car, characterized in that, The vehicle includes a vehicle parking lock system as described in any one of claims 1 to 9.

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