Brake input device, brake system and vehicle

Abstract

The utility model discloses a brake input device, brake system and vehicle, brake input device includes: cylinder body subassembly, piston, input rod, stop piece, the piston is movably provided in the cylinder body subassembly, the axial both ends of input rod are respectively first end and second end, the stop piece is located in the first end, the stop piece is located in the second end. The first end of the input rod extends into the cylinder body assembly and is matched with the piston; the stop piece is arranged on the piston and used for limiting the input rod to move in the direction where the input rod is disengaged from the piston. According to the brake input equipment disclosed by the embodiment of the utility model, the stop piece is arranged on the piston, so that the piston can be prevented from being separated from the cylinder body assembly when the piston moves relative to the cylinder body assembly, the free rotation of the input rod relative to the piston and the stop piece can be ensured, and the abrasion caused by the friction between the stop piece and the piston is effectively avoided; and the service life of the brake input equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, in particular to a brake input device, a brake system and a vehicle. Background Art

[0002] In the prior art, the structure of the brake input device is relatively complex, and the wear between the structures is relatively serious, which affects the service life and user experience of the brake input device. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the first purpose of the utility model is to provide a brake input device to avoid the wear of the stopper.

[0004] The second object of the present invention is to provide a braking system, comprising the braking input device described in the above embodiment.

[0005] The third object of the present utility model is to provide a vehicle, comprising the brake input device or brake system described in the above embodiment.

[0006] According to the first aspect of the present invention, the brake input device includes: a cylinder assembly, a piston, an input rod, and a stopper. The piston is movably arranged in the cylinder assembly, and the axial ends of the input rod are respectively a first end and a second end. The first end of the input rod extends into the cylinder assembly and cooperates with the piston. The stopper is arranged on the piston, and the stopper is used to limit the movement of the input rod in a direction of disengagement from the piston.

[0007] According to the brake input device of the embodiment of the utility model, a stopper is arranged on the piston to prevent the piston from escaping from the cylinder assembly when the piston moves relative to the cylinder assembly, and can ensure that the input rod can rotate freely relative to the piston and the stopper, thereby effectively avoiding wear caused by friction between the stopper and the piston and improving the service life of the brake input device.

[0008] In some embodiments, the first end of the input rod has a ball head, and the ball head is engaged between the stopper and the piston.

[0009] In some embodiments, the piston has a piston recess, a portion of the ball head fits into the piston recess, and at least a portion of the surface of the piston recess matches the outer surface of the ball head.

[0010] In some embodiments, the stopper has a stopper recess, a portion of the ball head fits into the stopper recess, and at least a portion of the surface of the stopper recess matches the outer surface of the ball head.

[0011] In some embodiments, the ball head has at least a partial clearance with at least one of the piston recess and the stopper recess.

[0012] In some embodiments, a lubricating medium is provided at the piston recess.

[0013] In some embodiments, a first accommodating cavity is formed at one end of the piston, at least a portion of the stopper is fitted in the first accommodating cavity, the first end of the input rod extends into the first accommodating cavity and passes through the stopper, and the stopper is used to limit the movement of the input rod in a direction of escaping from the first accommodating cavity.

[0014] In some embodiments, the stopper is entirely located within the first accommodating cavity.

[0015] In some embodiments, a receiving groove is formed on the side wall of the first receiving cavity, the radial outer portion of the stopper fits in the receiving groove, and the radial inner portion of the stopper protrudes from the side wall of the first receiving cavity.

[0016] In some embodiments, the gap between the end surface of the stopper away from the second end of the input rod and the corresponding wall surface of the accommodating groove along the axial direction of the input rod is D1, and the gap between the stopper and the surface of the first end of the input rod is D2, wherein D1 and D2 satisfy: D1≤D2.

[0017] In some embodiments, a plurality of deformation grooves are formed on an end surface of the stopper adjacent to the second end of the input rod, and the plurality of deformation grooves are arranged at intervals along the circumference of the input rod.

[0018] In some embodiments, the deformation groove penetrates the stopper along the radial direction of the input rod; and / or the deformation groove extends along the axial direction of the input rod.

[0019] In some embodiments, the stop member includes: a first stop segment and a second stop segment, the outer circumferential cross-sectional area of ​​the first stop segment being equal everywhere along the axial direction of the input rod; the second stop segment being connected to the second end of the input rod adjacent to the first stop segment, the outer circumferential cross-sectional area of ​​the second stop segment gradually increasing along the axial direction of the input rod toward the second end of the input rod; or the outer circumferential cross-sectional area of ​​the second stop segment being equal everywhere along the axial direction of the input rod, and a plurality of deformation grooves are formed at least on the second stop segment.

[0020] In some embodiments, the accommodating groove includes a first accommodating groove section and a second accommodating groove section, the first stop section fits in the first accommodating groove section, the shape of the first accommodating groove section is adapted to the shape of the first stop section, the second stop section fits in the second accommodating groove section, the shape of the second accommodating groove section is adapted to the shape of the second stop section.

[0021] In some embodiments, the cylinder assembly includes: a cylinder body and a cover body, wherein the cover body is arranged on a side of the cylinder body adjacent to the input rod, the cover body and the cylinder body jointly define an active cavity, the piston is movably arranged in the active cavity, and the one end of the input rod is suitable for abutting against the piston.

[0022] In some embodiments, the first end of the stopper is fitted in the first accommodating cavity, and the second end of the stopper is stopped between the first end of the piston and the inner wall of the cover body.

[0023] In some embodiments, the stop member includes: a first stop portion and a second stop portion, the first stop portion is fitted in the first accommodating cavity; the first end of the second stop portion is connected to the second end of the first stop portion adjacent to the input rod, the second end of the second stop portion extends in a radial direction of the input rod toward and away from the input rod, and the second stop portion stops between the first end of the piston and the inner wall of the cover body.

[0024] In some embodiments, a through hole for passing the input rod is formed on the stopper, and a cross-sectional area of ​​at least a portion of the through hole adjacent to the second end of the input rod gradually increases in a direction toward the second end of the input rod.

[0025] In some embodiments, the angle between the two side edges of the longitudinal cross section of the perforation is α, and α satisfies: 3.5°≤α≤6°.

[0026] In some embodiments, a second accommodating cavity is formed at the second end of the piston, and an elastic member is provided between the inner wall of the second accommodating cavity and the inner wall of the cylinder body, and the elastic member always pushes the piston toward the side where the input rod is located.

[0027] In some embodiments, the outer surface of the stopper is provided with a coating.

[0028] The braking system according to the second aspect of the present invention comprises the braking input device described in any one of the above embodiments.

[0029] The vehicle according to the third aspect of the present invention comprises the brake input device described in any one of the above embodiments or the brake system described in the above embodiments.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] Figure 1 It is an overall cross-sectional schematic diagram according to an embodiment of the utility model.

[0033] Figure 2 It is a cross-sectional schematic diagram of the assembly of the input rod and the piston according to the utility model.

[0034] Figure 3 It is a cross-sectional schematic diagram of the stopper according to the utility model.

[0035] Figure 4 It is a cross-sectional schematic diagram of a piston according to the utility model.

[0036] Figure 5 It is an overall cross-sectional schematic diagram according to another embodiment of the utility model.

[0037] Figure 6 It is a cross-sectional schematic diagram of an input rod and a piston according to another embodiment of the utility model.

[0038] Figure 7 It is a cross-sectional schematic diagram of a stopper according to another embodiment of the utility model.

[0039] Figure 8 It is a cross-sectional schematic diagram of a piston according to another embodiment of the utility model.

[0040] Reference numerals:

[0041] 100. Brake input device;

[0042] 10. Cylinder assembly; 11. Cover body; 12. Cylinder body; 13. Active chamber;

[0043] 20. Piston; 21. Piston recess; 22. First accommodating chamber; 221. Accommodating groove; 222. First accommodating groove section; 223. Second accommodating groove section; 23. Second accommodating chamber;

[0044] 30. Input rod; 31. Ball head;

[0045] 40. stopper; 41. first stopper section; 411. stopper recess; 42. second stopper section; 43. deformation groove; 44. perforation; 45. first stopper section; 46. second stopper section;

[0046] 50. Elastic parts. DETAILED DESCRIPTION

[0047] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 8 The brake input device 100 according to the embodiment of the present invention is described, and includes: a cylinder assembly 10 , a piston 20 , an input rod 30 , and a stopper 40 .

[0048] Specifically, if Figure 1 and Figure 2 As shown, the piston 20 is movably disposed in the cylinder assembly 10, the first end of the input rod 30 extends into the cylinder assembly 10 and cooperates with the piston 20, and a stopper 40 is disposed on the piston 20, and the stopper 40 is used to limit the movement of the input rod 30 in a direction of disengagement from the piston 20.

[0049] In this embodiment, the stopper 40 cooperates with the piston 20, and the stopper 40 moves as the piston 20 moves in the cylinder assembly 10. For example, the stopper 40 is connected to the piston 20, and the two axial ends of the input rod 30 are respectively a first end and a second end, and the first end of the input rod 30 extends into the cylinder assembly 10 to cooperate with the piston 20, and the input rod 30 can drive the piston 20 and the stopper 40 to move axially in the cylinder assembly 10, so that the piston 20 can be separated from the cylinder assembly 10. For example, the input rod 30 can transmit the force from the brake pedal, so that the input rod 30 drives the piston 20 to move to perform a braking action.

[0050] According to the brake input device 100 of the embodiment of the utility model, a stopper 40 is provided on the piston 20 to prevent the piston 20 from escaping from the cylinder assembly 10 when the piston 20 moves relative to the cylinder assembly 10, and to ensure that the input rod 30 can rotate freely relative to the piston 20 and the stopper 40, thereby effectively preventing wear caused by friction between the stopper 40 and the piston 20, thereby improving the service life of the brake input device 100.

[0051] In some embodiments, Figure 2 As shown, one end of the input rod 30 has a ball head 31, and the ball head 31 is fitted between the stopper 40 and the piston 20. One end of the input rod 30 provided with the ball head 31, that is, the first end, is located between the stopper 40 and the piston 20, and is rotatably fitted with the piston 20. The relative rotation of the ball head 31 and the piston 20 can reduce the precision requirement for the fit between the input rod 30 and the piston 20, so that the input rod 30 can rotate at multiple angles relative to the piston 20. Thus, the ball head 31 is fitted between the stopper 40 and the piston 20, so that the input rod 30 can rotate at multiple angles relative to the stopper 40 and the piston 20, thereby increasing the angular range of the rotation of the input rod 30 and reducing the possibility of contact wear between the input rod 30 and the cylinder assembly 10.

[0052] In some embodiments, in combination Figure 4 The piston 20 has a piston recess 21, a part of the ball head 31 is fitted in the piston recess 21, and at least part of the surface of the piston recess 21 is matched with the outer surface of the ball head 31. That is, the piston recess 21 is provided on the side surface of the piston 20 that matches with the ball head 31, and the piston recess 21 is recessed along the axial direction of the cylinder assembly 10 in a direction away from the piston 20. When the brake input device 100 is working, that is, when braking, the ball head 31 and the piston recess 21 are stopped. In order to improve the stability of the match between the ball head 31 and the piston 20, the surface of the piston recess 21 and the ball head 31 is a spherical surface, so as to be able to match with at least part of the surface of the ball head 31. Therefore, the setting of the piston recess 21 facilitates the piston 20 to limit the ball in the radial direction of the cylinder assembly 10, increases the reliability of the match between the ball and the piston 20, and reduces the wear between the ball head 31 and the piston 20.

[0053] Alternatively, if Figure 3 As shown, the stopper 40 has a stopper recess 411, which is provided on the side where the stopper 40 and the piston 20 are matched, and the stopper recess 411 is recessed in the direction away from the ball head 31 along the axial direction of the cylinder assembly 10. A part of the ball head 31 is matched in the stopper recess 411, and at least a part of the surface of the stopper recess 411 is matched with the outer surface of the ball head 31. For example, when there is no external force acting on the input rod 30 of the brake input device 100, the ball head 31 is matched with the stopper recess 411, and the stopper recess 411 is matched with the outer surface of the ball head 31. The surface of the stopper recess 411 facing the ball head 31 is a spherical surface. Thus, the setting of the stopper recess 411 facilitates the cooperation between the stopper recess 411 and the ball head 31, increases the stability of the cooperation between the input rod 30 and the stopper 40, reduces the wear between the stopper 40 and the ball head 31, and increases the service life of the stopper 40. At the same time, the input rod 30 can rotate relative to the stopper 40 at multiple angles, reducing the restriction on the rotation of the stopper 40 and the input rod 30.

[0054] In some embodiments, Figure 2As shown, there is at least a partial gap between the ball head 31 and at least one of the piston recess 21 and the stopper recess 411. For example, when the input rod 30 is subjected to force, the ball head 31 abuts against the piston recess 21, and the ball head 31 and the stopper recess 411 are clearance-matched, and at this time there is a gap between the ball head 31 and the stopper recess 411; when the input rod 30 is not subjected to force, the ball head 31 abuts against the stopper recess 411, and the ball head 31 and the piston recess 21 are clearance-matched, and at this time there is a gap between the ball head 31 and the piston recess 21. Therefore, when the ball head 31 is located between the piston 20 and the stopper 40, the ball head 31 is clearance-matched with one of the piston recess 21 and the stopper recess 411, thereby ensuring the rotation clearance of the ball head 31 to prevent the ball head 31 from directly wearing the stopper 40.

[0055] In some embodiments, a lubricating medium is provided at the piston recess 21. That is, the piston recess 21 can store a certain amount of lubricating medium, and when the ball head 31 in threshold contact rotates relative to the piston 20, the mating surface can be lubricated, the noise of the input rod 30 is reduced, and the wear between the ball head 31 and the piston 20 is reduced.

[0056] In some embodiments, Figure 1 As shown, the cylinder assembly 10 includes: a cylinder 12, a cover 11, the cover 11 is arranged on one side of the cylinder 12 adjacent to the input rod 30, the cover 11 and the cylinder 12 jointly define an active chamber 13, the piston 20 is movably arranged in the active chamber 13, and the first end of the input rod 30 is suitable for abutting against the piston 20. The cover 11 is connected to the cylinder 12 and defines the active chamber 13, the piston 20 moves along the axial direction of the cylinder 12 in the active chamber 13, and the piston 20 is guided and matched with the cylinder 12. The first end of the input rod 30 passes through the cover 11 and abuts against the piston 20 to drive the piston 20 to move. Therefore, the separate arrangement of the cover 11 and the cylinder 12 can reduce the difficulty of the processing technology of the rod assembly, and at the same time facilitate the inspection and maintenance of the inside of the cylinder assembly 10.

[0057] Optionally, combined Figure 1The first end of the piston 20 adjacent to the input rod 30 forms a first accommodating chamber 22, at least a portion of the stopper 40 fits in the first accommodating chamber 22, the first end of the input rod 30 extends into the first accommodating chamber 22 and passes through the stopper 40 to abut against the piston 20, the stopper 40 is used to limit the movement of the input rod 30 in the direction of escaping from the first accommodating chamber 22. The end of the input rod 30 extending into the movable chamber 13 is provided with a ball head 31, the ball head 31 is arranged between the stopper 40 and the piston 20, when the input rod 30 and the stopper 40 are assembled, after the end of the input rod 30 away from the ball head 31 is passed through the stopper 40, the stopper 40 is arranged on the piston 20, so that the stopper 40 can limit the position of the input rod 30 in the axial direction of the cylinder body 12. Thus, the first end of the input rod 30 cooperates with the first accommodating cavity 22 formed by the piston 20, and the stopper 40 limits the axial movement of the input rod 30 relative to the piston 20 in the cylinder body 12, so that the input rod 30 can push the piston 20 to move to achieve the braking function, and can prevent the input rod 30 from slipping out of the piston 20 when the brake is released.

[0058] In some embodiments, Figure 2 As shown, the stopper 40 is entirely located in the first accommodating cavity 22. That is, the stopper 40 is entirely located in the first accommodating cavity 22 and cooperates with the side wall of the first accommodating cavity 22. At this time, the end of the piston 20 adjacent to the cover body 11 is directly and detachably cooperated with the cover body 11, that is, when the input rod 30 is forced to push the piston 20 to move, the end of the piston 20 provided with the first accommodating cavity 22 is separated from the cover body 11, and the piston 20 moves in a direction away from the cover body 11. The input rod 30 has better stability in pushing the piston 20, and the structural strength of the assembly of the stopper 40 and the piston 20 is higher.

[0059] In some embodiments, Figure 4 As shown, a receiving groove 221 is formed on the side wall of the first receiving chamber 22, the radial outer portion of the stopper 40 is fitted in the receiving groove 221, and the radial inner portion of the stopper 40 protrudes from the side wall of the first receiving chamber 22. The stopper 40 is an annular structure, the outer peripheral wall of the stopper 40 is fitted with the receiving groove 221, the receiving groove 221 can limit the displacement of the stopper 40 along the axial direction of the cylinder body 12, and the inner peripheral wall of the stopper 40 protrudes from the side wall of the first receiving chamber 22 along the radial direction of the cylinder body 12, so that the stopper 40 stops against the input rod 30 in the axial direction of the cylinder body 12, preventing the input rod 30 from coming out, and at the same time preventing the input rod 30 from contacting with the side wall of the first receiving chamber 22 to prevent friction.

[0060] In some embodiments, in combination Figure 2, the gap between the end face of the stopper 40 away from the second end of the input rod 30, that is, the end face of the stopper 40 facing the cylinder body 12, and the corresponding wall surface of the accommodating groove 221 along the axial direction of the input rod 30 is D1, and the gap between the stopper 40 and the surface of the first end of the input rod 30, that is, the inner wall surface of the stopper recess 411 of the stopper 40 and the partial surface of the ball head 31 is D2, wherein D1 and D2 satisfy: D1≤D2. Limiting D1 to be less than or equal to D2 realizes the restriction of the circumferential movement of the ball head 31 along the cylinder body 12, so that the ball head 31 moves within a certain gap range to avoid wear on the ball head 31. If D1 is greater than D2, the input rod 30 may shake in the piston 20, resulting in abnormal noise of the brake input device 100.

[0061] Therefore, the stopper 40 and the piston 20 are matched along the axial clearance of the cylinder body 12, and the stopper 40 and the ball head 31 are matched, which can ensure the clearance for the ball head 31 to rotate relative to the stopper 40, avoid wear between the stopper 40 and the ball head 31, and at the same time, limit the axial space of the ball head 31 in the cylinder body 12, avoid the ball head 31 being stopped by the stopper 40 and the piston 20 when it is located between the stopper 40 and the piston 20, increase the angle of movement of the ball head 31 and the input rod 30 with the ball head 31 relative to the stopper 40 and the piston 20, so that the input rod 30 can move more easily, avoid wear of the ball head 31 caused by the stopper 40, and improve the service life of the brake input device 100.

[0062] In some embodiments, Figure 3 As shown, a plurality of deformation grooves 43 are formed on the end surface of the stopper 40 adjacent to the second end of the input rod 30, and the plurality of deformation grooves 43 are arranged at intervals along the circumference of the input rod 30, and the deformation grooves 43 penetrate the stopper 40 in the radial direction of the input rod 30 or extend in the axial direction of the input rod 30. A plurality of deformation grooves 43 are formed on the end surface of one end of the stopper 40 facing the cover body 11, and the deformation grooves 43 extend in the axial direction of the input rod 30 and penetrate the side wall of the stopper 40 in the radial direction of the input rod 30. Optionally, the deformation grooves 43 are provided on the inner circumferential wall or the outer circumferential wall of the stopper 40 and penetrate at least one side surface of the stopper 40 in the axial direction of the input rod 30, so as to achieve a thinning process on the side wall of the stopper 40. Therefore, a plurality of deformation grooves 43 are provided on the stop member 40 to increase the elastic deformation capability of the stop member 40, so as to reduce the difficulty of installation when the stop member 40 is installed with the piston 20, so that the stop member 40 can be more conveniently installed inside the first accommodating chamber 22, and can ensure that after the stop member 40 is installed in place, it can realize the radial stop against the piston 20 in the input rod 30.

[0063] Further, the stopper 40 comprises: a first stopper section 41 and a second stopper section 42, wherein the outer circumferential cross-sectional area of ​​the first stopper section 41 is equal everywhere along the axial direction of the input rod 30; the second stopper section 42 is connected to the second end of the first stopper section 41 adjacent to the input rod 30, that is, the second stopper section 42 and the first stopper section 41 are sequentially arranged and connected to each other along the axial direction of the input rod 30, and the stopper recess 411 is arranged at one end of the first stopper section 41 away from the second stopper section 42. The outer circumferential cross-sectional area of ​​the second stopper section 42 gradually increases along the axial direction of the input rod 30 and in the direction toward the other end of the input rod 30, or the outer circumferential cross-sectional area of ​​the second stopper section 42 is equal everywhere along the axial direction of the input rod 30, and a plurality of deformation grooves 43 are at least formed on the second stopper section 42. Along the axial direction of the input rod 30 toward the direction away from the first stop segment 41, the cross-sectional area of ​​the outer circumference of the second stop segment 42 gradually increases, so that the second stop segment 42 can be squeezed and deformed radially inward during installation to be installed into the piston 20, and the deformation restoring force of the second stop segment 42 is used to radially stop the piston 20 outward to achieve the installation of the stop member 40.

[0064] In addition, since the stopper 40 needs to withstand the pulling force of the input rod 30 when the input rod 30 is working, the deformation groove 43 does not penetrate the side wall of the stopper 40 along the axial direction of the input rod 30, so as to ensure that the stopper 40 has the ability of elastic deformation and improve the structural strength of the stopper 40.

[0065] In some embodiments, Figure 2 and Figure 4 As shown, the accommodating groove 221 includes a first accommodating groove section 222 and a second accommodating groove section 223, the first stop section 41 is fitted in the first accommodating groove section 222, and the shape of the first accommodating groove section 222 is adapted to the shape of the first stop section 41, the second stop section 42 is fitted in the second accommodating groove section 223, and the shape of the second accommodating groove section 223 is adapted to the shape of the second stop section 42.

[0066] An accommodating groove 221 is provided on the inner wall of the first accommodating cavity 22. The accommodating groove 221 includes a second accommodating groove section 223 and a first accommodating groove section 222 along the axial direction of the input rod 30. The second accommodating groove section 223 is provided at one end of the first accommodating groove section 222 adjacent to the cover body 11. The first accommodating groove section 222 communicates with the second accommodating groove section 223. The second accommodating groove section 223 gradually inclines toward the side wall of the first accommodating cavity 22 in the direction away from the first accommodating groove section 222 along the axial direction of the input rod 30, that is, the diameter of the inner wall surface of the second accommodating groove section 223 gradually increases in the direction away from the first accommodating groove section 222, and the diameter of the inner wall surface of the first accommodating groove section 222 remains unchanged along the axial direction of the input rod 30. The first accommodating groove section 222 cooperates with the first stop section 41, and the second accommodating groove section 223 cooperates with the second stop section 42. Therefore, the shape of the receiving groove 221 is adapted to the outer circumferential surface of the stopper 40 , so that the stopper 40 can recover its deformation when fitted in the receiving groove 221 , so that the receiving groove 221 can limit the stopper 40 along the axial direction of the input rod 30 .

[0067] In other embodiments, Figure 5 As shown, the first end of the stopper 40 is fitted in the first accommodating cavity 22, and the second end of the stopper 40 is stopped between the first end of the piston 20 and the inner wall of the cover body 11. That is, the stopper 40 is arranged between the cover body 11 and the piston 20, and the end of the stopper 40 away from the cover body 11 is fitted in the first accommodating cavity 22 and has an interference fit with the inner wall of the first accommodating cavity 22, and the end of the stopper 40 facing the cover body 11 is detachably matched with the cover body 11, that is, when the input rod 30 is subjected to external force, the stopper 40 is separated from the cover body 11, and when the input rod 30 is not subjected to external force, the stopper 40 is stopped with the cover body 11. In this way, the structure of the stopper 40 can be simplified, so that the assembly process of the stopper 40 and the piston 20 is simpler and the assembly reliability is higher.

[0068] In some embodiments, Figure 7As shown, the stopper 40 includes: a first stopper 45 and a second stopper 46. The first stopper 45 fits in the first accommodation cavity 22. The first end of the second stopper 46 is connected to the second end of the first stopper 45 adjacent to the input rod 30. The second end of the second stopper 46 extends in the radial direction of the input rod 30 in a direction away from the input rod 30. The second stopper 46 stops between the first end of the piston 20 and the inner wall of the cover body 11. The first stopper 45 is connected to the second stopper 46. The cross-sectional area of ​​the second stopper 46 is larger than the cross-sectional area of ​​the first stopper 45. The first stopper 45 and the second stopper 46 are arranged in a T-shaped structure. The first stopper 45 extends into the first accommodation cavity 22. The first stopper 45 and the first accommodation cavity 22 are tightly matched. The second stopper 46 is located between the piston 20 and the cover body 11. Therefore, the positions of the first stopper 45 and the second stopper 46 are set to simplify the structure of the stopper 40 and improve the assembly efficiency of the stopper 40 and the piston 20, so as to simplify the structure of the brake input device 100 and increase the reliability of the brake input device 100.

[0069] Alternatively, if Figure 7 As shown, the stopper 40 is formed with a through hole 44 for passing the input rod 30, and the cross-sectional area of ​​at least the portion of the through hole 44 adjacent to the second end of the input rod 30 gradually increases in the direction toward the second end of the input rod 30. That is, the cross-sectional area of ​​the through hole 44 gradually increases in the direction away from the piston 20 along the axial direction of the input rod 30. Thus, the input rod 30 and the stopper 40 are spaced apart, so that the input rod 30 and the stopper 40 are prevented from contacting each other and causing wear of the stopper 40, and the rotation angle of the input shaft can be increased, so that the interference of the stopper 40 on the input rod 30 is reduced.

[0070] Specifically, refer to Figure 7 , the angle between the two sides on the longitudinal section of the through hole 44 is α, and α satisfies: 3.5°≤α≤6°. If the angle between the two sides of the through hole 44 that are radially opposite to each other along the input shaft is less than 3.5°, the stopper 40 will limit the circumferential rotation of the input rod 30, and the stopper 40 will interfere with the rotation of the input rod 30, causing the input rod 30 to wear against the stopper 40 during rotation; if the angle between the two sides of the through hole 44 that are radially opposite to each other along the input shaft is greater than 6°, the rotation angle of the input rod 30 may be too large, affecting the assembly accuracy of the input shaft and the stopper 40. For example, α=5°. Thus, the angle between the two sides opposite to each other of the through hole 44 is limited to ensure the requirements of the vehicle end for the brake input device 100, ensure the normal operation of the input rod 30, and reduce the possibility of wear between the input rod 30 and the stopper 40.

[0071] In some embodiments, Figure 8As shown, a second accommodating chamber 23 is formed at the second end of the piston 20, and an elastic member 50 is provided between the inner wall of the second accommodating chamber 23 and the inner wall of the cylinder body 12, and the elastic member 50 always pushes the piston 20 toward the side where the input rod 30 is located. One end of the elastic member 50 fits in the second accommodating chamber 23 and abuts against the piston 20, and the other end of the elastic member 50 abuts against the cylinder body 12. The elastic member 50 is in a compressed state. When the input rod 30 is not acted upon by an external force, the elastic member 50 pushes the piston 20 to move in a direction away from the cylinder body 12, so that the piston 20 or the stopper 40 abuts against the cover body 11. Therefore, the provision of the elastic member 50 facilitates always pushing the piston 20, so that the stability of the assembly of the piston 20 and the cylinder body 12 is higher, and at the same time facilitates the input rod 30 to restore the initial position when no external force is applied.

[0072] In some embodiments, the outer surface of the stopper 40 is provided with a coating. For example, the outer surface of the stopper 40 can be plated by a surface treatment technique of plating to form a film layer on the surface, thereby changing the performance of the stopper 40 and increasing the corrosion resistance of the stopper 40.

[0073] The braking system according to the second embodiment of the present invention comprises the braking input device 100 of any one of the above embodiments.

[0074] According to the braking system of the embodiment of the utility model, the number of parts of the braking system is reduced and the installation process is simpler.

[0075] The vehicle according to the third aspect of the present invention comprises the brake input device 100 of any one of the above embodiments or the brake system of the above embodiments.

[0076] According to the vehicle of the embodiment of the utility model, the reliability of the vehicle can be increased by optimizing the braking device or the braking system, so that the vehicle can better meet the demand of the vehicle for the braking input device 100.

[0077] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0078] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0080] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A brake input device, characterized in that: include: Cylinder assembly; a piston movably disposed in the cylinder assembly; An input rod, wherein two axial ends of the input rod are respectively a first end and a second end, and the first end of the input rod extends into the cylinder assembly and cooperates with the piston; A stopper is provided on the piston and is used to limit the movement of the input rod in a direction of disengaging from the piston.

2. The brake input device according to claim 1, characterized in that The first end of the input rod has a ball head, and the ball head is fitted between the stopper and the piston.

3. The brake input device according to claim 2, characterized in that The piston has a piston recessed portion, a portion of the ball head is fitted in the piston recessed portion, and at least a portion of the surface of the piston recessed portion is matched with the outer surface of the ball head.

4. The brake input device according to claim 3, characterized in that: The stopper has a stopper recessed portion, a portion of the ball head is fitted in the stopper recessed portion, and at least a portion of the surface of the stopper recessed portion is matched with the outer surface of the ball head.

5. The brake input device according to claim 4, characterized in that The ball head has at least partial clearance with at least one of the piston recess and the stopper recess.

6. The brake input device according to claim 3, characterized in that A lubricating medium is provided at the recessed portion of the piston.

7. The brake input device according to claim 1, characterized in that A first accommodating cavity is formed at one end of the piston, at least a portion of the stopper is fitted in the first accommodating cavity, the first end of the input rod extends into the first accommodating cavity and passes through the stopper, and the stopper is used to limit the movement of the input rod in a direction of escaping from the first accommodating cavity.

8. The brake input device according to claim 7, characterized in that The stopper is entirely located in the first accommodating cavity.

9. The brake input device according to claim 7, characterized in that: An accommodating groove is formed on the side wall of the first accommodating cavity. The radial outer portion of the stopper is fitted in the accommodating groove, and the radial inner portion of the stopper protrudes from the side wall of the first accommodating cavity.

10. The brake input device according to claim 9, characterized in that A gap D1 is formed between an end surface of the stopper away from the second end of the input rod and a corresponding wall surface of the accommodating groove along the axial direction of the input rod; A gap D2 is provided between the stopper and the surface of the first end of the input rod, wherein D1 and D2 satisfy: D1≤D2.

11. The brake input device according to claim 9, characterized in that A plurality of deformation grooves are formed on an end surface of the stopper adjacent to the second end of the input rod, and the plurality of deformation grooves are arranged at intervals along the circumference of the input rod.

12. The brake input device according to claim 11, characterized in that The deformation groove penetrates the stopper along the radial direction of the input rod; and / or The deformation groove extends along the axial direction of the input rod.

13. The brake input device according to claim 11, characterized in that The stopper comprises: A first stop section, wherein the outer circumferential cross-sectional area of ​​the first stop section is equal everywhere along the axial direction of the input rod; a second stop segment, the second stop segment being connected to the second end of the input rod adjacent to the first stop segment, the outer circumferential cross-sectional area of ​​the second stop segment gradually increasing along the axial direction of the input rod and in a direction toward the second end of the input rod; or The outer circumferential cross-sectional area of ​​the second stop segment is uniform everywhere along the axial direction of the input rod, and a plurality of deformation grooves are formed at least on the second stop segment.

14. The brake input device according to claim 13, characterized in that The accommodating groove includes a first accommodating groove section and a second accommodating groove section, the first stop section is fitted in the first accommodating groove section, and the shape of the first accommodating groove section is adapted to the shape of the first stop section, the second stop section is fitted in the second accommodating groove section, and the shape of the second accommodating groove section is adapted to the shape of the second stop section.

15. The brake input device according to claim 7, characterized in that The cylinder assembly comprises: Cylinder body; A cover body is arranged on a side of the cylinder body adjacent to the input rod, the cover body and the cylinder body jointly define an active cavity, the piston is movably arranged in the active cavity, and the first end of the input rod is suitable for abutting against the piston.

16. The brake input device according to claim 15, characterized in that The first end of the stopper is fitted in the first accommodating cavity, and the second end of the stopper is stopped between the first end of the piston and the inner wall of the cover body.

17. The brake input device according to claim 16, characterized in that The stopper comprises: a first stopper, the first stopper being fitted in the first accommodating cavity; A second stop portion, wherein the first end of the second stop portion is connected to the second end of the first stop portion adjacent to the input rod, the second end of the second stop portion extends in a radial direction of the input rod toward a direction away from the input rod, and the second stop portion stops between the first end of the piston and the inner wall of the cover body.

18. The brake input device according to claim 7, characterized in that A through hole for passing the input rod is formed on the stopper, and a cross-sectional area of ​​at least a portion of the through hole adjacent to the second end of the input rod gradually increases in a direction toward the second end of the input rod.

19. The brake input device according to claim 18, characterized in that The angle between the two side edges on the longitudinal section of the perforation is α, and α satisfies: 3.5°≤α≤6°.

20. The brake input device according to claim 15, characterized in that A second accommodating cavity is formed at the second end of the piston, and an elastic member is arranged between the inner wall of the second accommodating cavity and the inner wall of the cylinder body, and the elastic member always pushes the piston toward the side where the input rod is located.

21. The brake input device according to any one of claims 1 to 20, characterized in that: The outer surface of the stopper is provided with a coating.

22. A braking system, characterized in that: Comprising a brake input device according to any one of claims 1-21.

23. A vehicle, characterized in that: Comprising a brake input device according to any one of claims 1-21 or a brake system according to claim 22.

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