Hydraulic brake cylinder

Abstract

The application relates to a hydraulic brake oil cylinder, which comprises a cylinder body, a piston, a transmission rod, a limiting pin, a first elastic member, a first transmission member, a second transmission member and a clutch assembly. The clutch assembly comprises a first clutch assembly and a second clutch assembly. The first clutch assembly and the second clutch assembly are respectively arranged in the first transmission member and the second transmission member in a separable mode and are respectively detachably connected with the transmission rod. The hydraulic brake oil cylinder has an automatic gap adjustment function, the structure in the hydraulic cylinder is simplified, the stroke of the automatic gap adjustment is lengthened, and the stable braking effect can be ensured when the disc wears seriously and the braking gap is too large.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of train braking, and particularly relates to a hydraulic braking oil cylinder. BACKGROUND

[0002] With the development of urban rail transit technology, tramcars are gradually popularized due to their low construction cost, and most of them adopt a low-floor structure for the convenience of passengers getting on and off, so that the installation space left for braking components is extremely small. Meanwhile, tramcars are also developing in the direction of rapidity, lightness and low chassis, and higher and higher requirements are put forward for the miniaturization and lightness of braking components.

[0003] Most tramcars adopt a hydraulic braking system, and the hydraulic braking oil cylinder in the prior art can realize the parking brake and manual relief of the vehicle, but the structure is relatively complex. Meanwhile, since the energy storage stroke in the oil cylinder is limited, in order to avoid the safety hazards caused by the large brake clearance, long brake response time and brake force attenuation after the disc wears, whether the hydraulic braking oil cylinder has a self-clearance adjustment function is very important.

[0004] However, the hydraulic braking oil cylinder in the prior art has only a manual clearance adjustment function, and the disc clearance needs to be manually adjusted regularly, which is very inconvenient. Although some hydraulic braking oil cylinders have an automatic clearance adjustment function, the adjustment amount is very small at one time, and the YJQ-4 type hydraulic braking clamp unit produced by the China CNR Zhuzhou Electric Locomotive Co., Ltd. has an adjustment amount of only 0.15mm at one time, so that the use and maintenance are relatively inconvenient. SUMMARY

[0005] In view of the deficiencies in the related art, the application provides a hydraulic braking oil cylinder, which has an automatic clearance adjustment function, simplifies the structure in the hydraulic cylinder, and lengthens the stroke of automatic clearance adjustment. When the disc wears seriously and the brake clearance is too large, the stability of the braking effect can be ensured.

[0006] The application provides a hydraulic brake oil cylinder, comprising: a cylinder body, an oil inlet being arranged on the cylinder body and being communicated with the inside and outside of the cylinder body, a first limiting groove, a second limiting groove, a third limiting groove and a fourth limiting groove being arranged in the cylinder body, a piston being slidably arranged in the first limiting groove and separating the inside of the cylinder body, a transmission rod being arranged in the cylinder body and being connected with a brake assembly at one end through the piston, a limiting pin being arranged in the cylinder body and being in transmission connection with the other end of the transmission rod, a first elastic member being arranged in the second limiting groove and surrounding the transmission rod, a first transmission member being slidably arranged in the third limiting groove, one end of the first transmission member being in abutment with the first elastic member, and the other end of the first transmission member being in abutment with the piston, a second transmission member being slidably arranged in the fourth limiting groove, the distance in the direction of the axis of the transmission rod in the fourth limiting groove being the stroke of the second transmission member, and a clutch assembly comprising a first clutch assembly and a second clutch assembly, the first clutch assembly and the second clutch assembly being respectively and separately arranged in the first transmission member and the second transmission member, and being respectively and detachably connected with the transmission rod.

[0007] Through the above technical scheme, the first transmission member and the first clutch assembly, and the second transmission member and the second clutch assembly are in clutching action in the cylinder body to cooperate with the movement of the transmission rod, so that the movement stroke of the transmission rod is greatly increased.

[0008] Optionally, the first elastic member drives the second transmission member to move the maximum stroke in the fourth limiting groove through the first transmission member, the first clutch assembly, the transmission rod and the second clutch assembly, the fourth limiting groove limits the second transmission member from continuing to move with the transmission rod, the second clutch assembly is separated from the second transmission member and rotates in place to make the first elastic member continue to push the transmission rod to continue to extend by a compensation gap distance.

[0009] Through the above technical scheme, the stroke of the transmission rod can be self-adjusted, and when the brake gap is greater than the standard gap, the operation of automatically compensating the gap is automatically performed, so that the brake assembly can be stably pushed to the standard brake surface through the transmission rod.

[0010] Optionally, the first clutch assembly comprises: a first clutch member being separately arranged in the first transmission member and being in non-self-locking threaded connection with the transmission rod, one end of the first clutch member being provided with a first circular table, a first auxiliary member being in abutment with the first circular table and surrounding the first clutch member, and a second elastic member being in abutment with the first auxiliary member and surrounding the first clutch member; and the second clutch assembly comprises: a second clutch member being separately arranged in the second transmission member and being in non-self-locking threaded connection with the transmission rod, one end of the second clutch member being provided with a second circular table, a second auxiliary member being in abutment with the second circular table and surrounding the second clutch member, and a third elastic member being in abutment with the second auxiliary member and surrounding the second clutch member.

[0011] By the above technical solution, when the first transmission member and the second transmission member are limited, the first clutch member and the second clutch member are operated to separate from the first transmission member and the second transmission member, and rotate in place under the elastic force of the second elastic member and the third elastic member and the assistance of the first auxiliary member and the second auxiliary member, thereby ensuring the displacement of the first clutch member and the second clutch member relative to the transmission rod.

[0012] Optionally, the first transmission member is provided with a first conical groove, and the first transmission member drives the first clutch member to displace through the first conical groove; the second transmission member is provided with a second conical groove, and the second transmission member drives the second clutch member to displace through the second conical groove.

[0013] By the above technical solution, the contact area of the first clutch member and the first transmission member and the contact area of the second clutch member and the second transmission member are increased, and the first clutch member and the second clutch member and the first transmission member and the second transmission member do not easily rotate relative to each other when normally combined and driven.

[0014] Optionally, the hand relief device further comprises a cavity provided on one side of the cylinder body, a limiting pin slidingly provided in the cavity and the cylinder body, a ratchet fixedly provided on one end of the limiting pin, a third auxiliary member surrounding the limiting pin and abutting against the ratchet, and a stop pin slidingly provided on the cavity and abutting against a ratchet tooth portion of the ratchet.

[0015] By the above technical solution, the ratchet limits the rotation of the transmission rod to achieve a braking effect, and the stop pin limits the rotation of the ratchet. When a hand relief operation is needed, the stop pin is only needed to be pulled up, the rotation limitation of the transmission rod is removed, the transmission rod is pushed back under the reverse force of the braking force, and the transmission rod is rotated back to achieve a relief braking effect under the assistance of the third auxiliary member.

[0016] Optionally, the hand relief device further comprises a handle member slidingly provided in the cavity, a first boss provided on one end of the handle member, the stop pin slidingly provided in the first boss, a first reset member surrounding the handle member and abutting against the first boss on one end and abutting against an inner wall of the cavity on the other end.

[0017] By the above technical solution, it is more convenient to pull up the stop pin using the handle member, and the handle member and the stop pin can be reset by the first reset member when the handle member is released.

[0018] Optionally, a second boss is provided on the stop pin, and a second reset member is provided around the stop pin and abutting against the second boss on one end and abutting against the first boss on the other end.

[0019] Through the technical scheme, the extension and retraction of the stop pin can be adjusted not only by the handle piece, but also by the ratchet wheel to control the movement of the transmission rod without pulling the handle piece, so that the adjustment operation of the transmission rod becomes simpler.

[0020] Optionally, the hand relief device further comprises a limiting pad, the limiting pad is arranged on the cavity, and the handle piece is arranged through the limiting pad, so that the rotary movement of the handle piece is limited by the limiting pad.

[0021] Through the technical scheme, the rotary movement of the handle piece is limited by the limiting pad, the positional relationship between the stop pin and the ratchet is more stable, and the tooth skipping phenomenon is avoided, so that the transmission rod is retracted to cause insufficient braking force.

[0022] Optionally, the brake assembly comprises a positioning pin, a connecting seat connected with the transmission rod through the positioning pin, a magnetic piece fixedly arranged on the connecting seat, and a brake piece magnetically connected with the magnetic piece.

[0023] Through the technical scheme, in the automatic compensation gap, manual gap adjustment, and hand relief state, the transmission rod rotates, and the brake piece only needs to move along the axis direction of the transmission rod. The magnetic piece is fixedly arranged on the connecting seat and magnetically connected with the brake piece, so that the brake piece is prevented from being attached to the high-speed rotating brake piece in the relief state, and abnormal wear is reduced.

[0024] Optionally, one end of the limiting pin is further provided with a hexagonal counterbore, and the limiting pin is rotated through the hexagonal counterbore, so as to drive the transmission rod to move to a predetermined position.

[0025] Through the technical scheme, the operator rotates the hexagonal counterbore, and the limiting pin drives the transmission rod to move to a predetermined position, so as to complete the operation of manual gap adjustment.

[0026] In summary, the hydraulic brake oil cylinder provided by the application can automatically compensate the gap when the braking gap is greater than the standard gap, so as to ensure that the brake assembly can be stably pushed to the standard brake surface through the transmission rod. The movement of the transmission rod is matched by the clutching actions of the first transmission piece and the first clutch assembly, and the second transmission piece and the second clutch assembly in the cylinder body, so that the movement stroke of the transmission rod is greatly increased, and the hand relief function and the manual gap adjustment function are simultaneously realized. BRIEF DESCRIPTION OF DRAWINGS

[0027] The drawings described herein are used to provide further understanding of the application, and form a part of the application. The illustrative embodiments of the application and their descriptions are used to explain the application, and do not constitute improper limitations on the application. In the drawings:

[0028] Figure 1 It is a total sectional view of the hydraulic brake oil cylinder of the application;

[0029] Figure 2 (a)~(c) are structural schematic diagrams of the cylinder body of the hydraulic brake oil cylinder of the present application;

[0030] Figure 3 (a)~(c) are structural schematic diagrams of the cylinder body of the hydraulic brake oil cylinder of the present application;

[0031] Figure 4 (a)~(c) are structural schematic diagrams of the cylinder body of the hydraulic brake oil cylinder of the present application;

[0032] Figure 5 (a)~(c) are structural schematic diagrams of the cylinder body of the hydraulic brake oil cylinder of the present application;

[0033] Figure 6 (a)~(c) are structural schematic diagrams of the cylinder body of the hydraulic brake oil cylinder of the present application;

[0034] Figure 7 (a)~(c) are structural schematic diagrams of the cylinder body of the hydraulic brake oil cylinder of the present application;

[0035] Figure 8 (a)~(c) are structural schematic diagrams of the cylinder body of the hydraulic brake oil cylinder of the present application;

[0036] Figure 9 (a)~(c) are structural schematic diagrams of the cylinder body of the hydraulic brake oil cylinder of the present application;

[0037] Figure 10 (a)~(c) are structural schematic diagrams of the cylinder body of the hydraulic brake oil cylinder of the present application;

[0038] Figure 11 (a)~(c) are structural schematic diagrams of the cylinder body of the hydraulic brake oil cylinder of the present application;

[0039] Figure 12 (a)~(c) are structural schematic diagrams of the cylinder body of the hydraulic brake oil cylinder of the present application;

[0040] Figure 13 (a)~(c) are structural schematic diagrams of the cylinder body of the hydraulic brake oil cylinder of the present application;

[0041] In the drawings:

[0042] 1, cylinder; 1.1, oil inlet; 1.2, first limiting groove; 1.3, second limiting groove; 1.4, third limiting groove; 1.5, fourth limiting groove; 2, piston; 3, transmission rod; 4, limiting pin; 4.1, hexagonal counterbore; 5, first elastic member; 6, first transmission member; 6.1, first conical groove; 7, second transmission member; 7.1, second conical groove; 8, clutch assembly; 8.1, first clutch assembly; 8.1.1, first clutch member; 8.1.1.1, first circular table; 8.1.2, first auxiliary member; 8.1.3, second elastic member; 8.2, second clutch assembly; 8.2.1, second clutch member; 8.2.1.1, second circular table; 8.2.2, second auxiliary member; 8.2.3, third elastic member; 9, hand relief device; 9.1, cavity; 9.2, ratchet wheel; 9.2.1, ratchet tooth; 9.3, third auxiliary member; 9.4, stop pin; 9.4.1, second boss; 9.4.2, first reset member; 9.5, fourth auxiliary member; 9.6, handle member; 9.6.1, first boss; 9.6.2, first reset member; 10, brake assembly; 10.1, positioning pin; 10.2, connecting seat; 10.3, magnetic member; 10.4, brake member; 11, piston limiting surface; 12, second sealing groove; 13, piston counterbore; 14, piston through hole; 15, piston boss; 16, first sealing groove; 17, oil inlet groove; 18, limiting pad. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] In the description of the present application, it should be understood that the terms "center", "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0045] The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features.

[0046] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiments:

[0048] Reference Figures 1-4 A hydraulic brake cylinder, comprising: a cylinder body 1, a piston 2, a transmission rod 3, a limit pin 4, a first elastic member 5, a first transmission member 6, a second transmission member 7 and a clutch assembly 8; The cylinder body 1 is provided with an oil inlet 1.1 communicating inside and outside, the position of the oil inlet 1.1 connected in the cylinder body 1 is provided with an oil inlet groove 17, the cylinder body 1 is provided with a first limit groove 1.2, a second limit groove 1.3, a third limit groove 1.4 and a first sealing groove 16; The cylinder body 1 further comprises a first end cover and a second end cover, the first end cover is arranged at one end of the cylinder body 1 close to the oil inlet 1.1, the end of the first end cover in the cylinder body 1 is a piston limiting surface 11, the piston limiting surface 11 limits the sliding of the piston 2 out of the cylinder body 1, the first end cover is provided with a second sealing groove 12; In this embodiment, the first sealing groove 16 and the second sealing groove 12 are used to install a sealing ring to seal high-pressure oil; The second end cover is arranged at the other end of the cylinder body 1 to close the second limit groove 1.3, and the second end cover is provided with a fourth limit groove 1.5.

[0049] Reference Figure 1 , Figure 5 , Figure 6 The piston 2 is arranged in the first limit groove 1.2 and separates the inside of the cylinder body 1, one end of the piston 2 is provided with a piston boss 15, when the end face of the piston boss 15 is in contact with the piston limiting surface 11, the piston 2 is limited to slide out of the cylinder body 1, the other end of the piston 2 is also provided with a piston sunken boss 13, the piston sunken boss 13 is used to accommodate the abutment of the first transmission member 6, and the inside of the piston 2 is provided with a piston through hole 14; The transmission rod 3 is arranged in the cylinder body 1 and the first end penetrates through the piston through hole 14 to connect a brake assembly 10, in this embodiment, the transmission rod 3 is provided with a cavity at both ends, and the outer wall of the transmission rod 3 is provided with external threads.

[0050] The brake assembly 10 comprises a positioning pin 10.1, a connecting seat 10.2, a magnetic part 10.3 and a brake part 10.4. The connecting seat 10.2 is rotationally connected to the transmission rod 3 through the positioning pin 10.1. In this embodiment, the positioning pin 10.1 is eccentrically arranged in the outer wall of the connecting seat 10.2 and the inner wall of the cavity of the transmission rod 3 in the direction perpendicular to the axis of the transmission rod 3, so that the connecting seat 10.2 cannot move along the axis of the transmission rod 3 but can rotate. The magnetic part 10.3 is fixedly arranged on the connecting seat 10.2 by a pin. In this embodiment, the magnetic part 10.3 comprises but is not limited to a permanent magnet. In this embodiment, the brake part 10.4 is a brake pad made of metal material. The magnetic part 10.3 is magnetically connected to the brake part 10.4. When the transmission rod 3 rotates in the automatic compensation gap, manual gap adjustment and manual relief state, the brake part 10.4 only needs to move along the axis of the transmission rod 3. The magnetic part 10.3 is fixedly arranged on the connecting seat 10.2 and magnetically connected to the brake part 10.4, so as to prevent the brake part 10.4 from being attached to the high-speed rotating brake part in the relief state and reduce abnormal wear. The limiting pin 4 is arranged in the cylinder body 1 and inserted into the second end cavity of the transmission rod 3 through two transmission pins. The transmission rod 3 can be axially displaced relative to the limiting pin 4, but the transmission rod 3 cannot rotate relative to the limiting pin 4. The first elastic part 5 is arranged around the transmission rod 3 in the second limiting groove 1.3. In this embodiment, the first elastic part 5 comprises but is not limited to a disc spring group, which is formed by stacking several disc springs of the same specification. Different specifications and quantities of disc springs can be configured according to different brake output force requirements.

[0051] Referring to Figure 1 , Figure 4 , Figure 7 and Figure 8 , the outer wall of the first transmission part 6 is provided with a first protruding ring, and two third protruding bosses are symmetrically arranged on the first protruding ring. The first transmission part 6 slides in the third limiting groove 1.4 through the two third protruding bosses, and the third limiting groove 1.4 limits the rotation of the first transmission part 6 through the two third protruding bosses. One end surface of the first protruding ring abuts against the first elastic part 5, and the other end abuts against the piston 2. One end of the first transmission part 6 extends into the piston sink 13 and abuts against it. The outer wall of the second transmission part 7 is provided with a second protruding ring, and two fourth protruding bosses are symmetrically arranged on the second protruding ring. One end of the second transmission part 7 extends into the second end cover. The second transmission part 7 slides in the fourth limiting groove 1.5 through the two fourth protruding bosses. The distance in the axial direction of the transmission rod 3 in the fourth limiting groove 1.5 is the stroke of the second transmission part 7.

[0052] Referring to the above drawings, the clutch assembly 8 comprises a first clutch assembly 8.1 and a second clutch assembly 8.2. The first clutch assembly 8.1 and the second clutch assembly 8.2 are respectively detachably arranged in the first transmission part 6 and the second transmission part 7, and are respectively detachably connected to the transmission rod 3.

[0053] Specifically, the first clutch assembly 8.1 comprises a first clutch member 8.1.1, a first auxiliary member 8.1.2, and a second elastic member 8.1.3. In this embodiment, the first clutch member 8.1.1 is provided with an inner thread matched with the transmission rod 3, the thread angle of the inner thread is greater than the friction angle, and the first clutch member 8.1.1 is non-self-locking. The first clutch member 8.1.1 is detachably arranged in the first transmission member 6 and is non-self-lockingly connected with the transmission rod 3. One end of the first clutch member 8.1.1 is provided with a first circular table 8.1.1.1, and the first transmission member 6 is provided with a first conical groove 6.1. The first transmission member 6 drives the first clutch member 8.1.1 to displace by matching the first conical groove 6.1 with the first circular table 8.1.1.1. The first auxiliary member 8.1.2 abuts against the first circular table 8.1.1.1 around the first clutch member 8.1.1. The first auxiliary member 8.1.2 in this embodiment includes but is not limited to a bearing member. The second elastic member 8.1.3 abuts against the first auxiliary member 8.1.2 around the first clutch member 8.1.1. The second elastic member 8.1.3 in this embodiment includes but is not limited to a compression spring set, and a plurality of compression springs are arranged around the first clutch member 8.1.1. In this embodiment, the first clutch assembly 8.1 further comprises a first gasket, a first retainer, and a first fixed seat. The first fixed seat is provided with a plurality of first through holes for accommodating the second elastic member 8.1.3. The first gasket and the first retainer encapsulate the first clutch member 8.1.1, the first auxiliary member 8.1.2, the first fixed seat, and the second elastic member 8.1.3 in the first transmission member 6. The elastic force of the second elastic member 8.1.3 drives the first clutch member 8.1.1 to engage with the first conical groove 6.1.

[0054] Specifically, the second clutch assembly 8.2 comprises a second clutch member 8.2.1, a second auxiliary member 8.2.2, and a third elastic member 8.2.3. In this embodiment, the second clutch member 8.2.1 is provided with an inner thread matched with the transmission rod 3, the thread angle of the inner thread is greater than the friction angle, and the second clutch member 8.2.1 is non-self-locking. The second clutch member 8.2.1 is detachably arranged in the second transmission member 7 and is non-self-lockingly connected with the transmission rod 3. One end of the second clutch member 8.2.1 is provided with a second circular table 8.2.1.1, and the second transmission member 7 is provided with a second conical groove 7.1. The second transmission member 7 drives the second clutch member 8.2.1 to displace by matching the second conical groove 7.1 with the second circular table 8.2.1.1. The second auxiliary member 8.2.2 abuts against the second circular table 8.2.1.1 around the second clutch member 8.2.1. In this embodiment, the second auxiliary member 8.2.2 includes but is not limited to a bearing member. The third elastic member 8.2.3 abuts against the second auxiliary member 8.2.2 around the second clutch member 8.2.1. In this embodiment, the third elastic member 8.2.3 includes but is not limited to a compression spring set, and a plurality of compression springs are arranged around the second clutch member 8.2.1. In this embodiment, the second clutch assembly 8.2 further comprises a second gasket, a second check ring, and a second fixing seat. The second fixing seat is provided with a plurality of second through holes for accommodating the third elastic member 8.2.3. The second gasket and the second check ring encapsulate the second clutch member 8.2.1, the second auxiliary member 8.2.2, the second fixing seat, and the third elastic member 8.2.3 in the second transmission member 7. The elastic force of the third elastic member 8.2.3 drives the second clutch member 8.2.1 to engage with the second conical groove 7.1.

[0055] Based on the structure as above, when the first transmission member 6 and the second transmission member 7 are limited, the first clutch member 8.1.1 and the second clutch member 8.2.1 operate to disengage from the first transmission member 6 and the second transmission member 7 against the elastic force of the second elastic member 8.1.3 and the third elastic member 8.2.3, and the first clutch member 8.1.1 and the second clutch member 8.2.1 rotate in place under the elastic force of the second elastic member 8.1.3 and the third elastic member 8.2.3 and the assistance of the first auxiliary member 8.1.2 and the second auxiliary member 8.2.2, to ensure the displacement of the first clutch member 8.1.1 and the second clutch member 8.2.1 relative to the transmission rod 3; the first taper groove 6.1 and the second taper groove 7.1 are arranged in mesh with the first circular cone 8.1.1.1 and the second circular cone 8.2.1.1, to increase the contact area of the first clutch member 8.1.1 and the first transmission member 6 and the second clutch member 8.2.1 and the second transmission member 7, so that the first clutch member 8.1.1 and the second clutch member 8.2.1 do not easily rotate relative to the first transmission member 6 and the second transmission member 7 in normal combined transmission; the first elastic member 5 drives the second transmission member 7 to move in the fourth limiting groove 1.5 by the first transmission member 6, the first clutch assembly 8.1, the transmission rod 3 and the second clutch assembly 8.2, the fourth limiting groove 1.5 limits the continuous movement of the second transmission member 7 along with the transmission rod 3, the second clutch assembly 8.2 is separated from the second transmission member 7 and rotates in place to make the first elastic member 5 continue to push the transmission rod 3 to continue to extend to compensate for the gap distance, the arrangement of the clutch assembly 8 enables the stroke of the transmission rod 3 to be self-adjusted, automatically compensates for the gap when the brake gap is greater than the standard gap, and ensures that the brake assembly 10 can be stably pushed to the standard brake surface by the transmission rod 3. In this embodiment, the stroke of the transmission rod 3 is self-adjusted, so that the adjustment amount of the hydraulic brake cylinder of the present application can reach 1.5 mm, and daily use and maintenance work become more convenient.

[0056] Reference Figure 9 , Figure 10 , Figure 11 , the hydraulic brake cylinder further comprises a manual relief device 9, and the manual relief device 9 comprises a cavity 9.1, a ratchet 9.2, a third auxiliary member 9.3 and a stop pin 9.4; the cavity 9.1 is arranged on one side of the cylinder body 1, the limiting pin 4 is arranged in the cavity 9.1 and the cylinder body 1, and a fourth auxiliary member 9.5 is arranged between the limiting pin 4 and the cavity 9.1; in this embodiment, the fourth auxiliary member 9.5 includes but is not limited to a bearing member; one end of the limiting pin 4 is further provided with a hexagonal counterbore 4.1, the limiting pin 4 is rotated through the hexagonal counterbore 4.1 to drive the transmission rod 3 to move to a predetermined position, and the operator can drive the transmission rod 3 to move to a predetermined position through the limiting pin 4 by rotating the hexagonal counterbore 4.1 to complete the manual gap adjustment operation.

[0057] In the embodiment, the cavity 9.1 comprises a vertical chamber and a horizontal chamber; the ratchet wheel 9.2 is fixed to one end of the limiting pin 4, and in the embodiment, the ratchet wheel 9.2 is arranged in the horizontal chamber and is fixed to one end of the limiting pin 4 through two ratchet pins; the third auxiliary part 9.3 surrounds the limiting pin 4 and abuts against the ratchet wheel 9.2, and in the embodiment, the third auxiliary part 9.3 comprises but is not limited to a bearing part, and the third auxiliary part 9.3 is arranged in the horizontal chamber; in the embodiment, the hand relief device 9 further comprises a ratchet wheel seat arranged in the horizontal chamber for loading the ratchet wheel 9.2, and the third auxiliary part 9.3 is arranged between the ratchet wheel seat and the ratchet wheel 9.2, one end of the ratchet wheel seat is closed to form a left closed end of the fourth limiting groove 1.5, and two limiting grooves are arranged on the ratchet wheel seat to accommodate two fourth protrusions on the second transmission part 7, so that the second transmission part 7 cannot rotate through the two limiting grooves; the stop pin 9.4 is slidably arranged in the cavity 9.1, and in the embodiment, the stop pin 9.4 is arranged in the vertical chamber, and one end of the stop pin 9.4 abuts against the ratchet teeth 9.2.1 of the ratchet wheel 9.2; the hand relief device 9 further comprises a handle part 9.6, the handle part 9.6 is slidably arranged at the top of the vertical chamber, one end of the handle part 9.6 is provided with a first protrusion 9.6.1, the stop pin 9.4 is slidably arranged in the first protrusion 9.6.1, a first reset part 9.6.2 is arranged around the handle part 9.6, one end of the first reset part 9.6.2 abuts against the first protrusion 9.6.1, and the other end abuts against the inner wall of the cavity 9.1, so that it is more convenient to pull up the stop pin 9.4 by using the handle part 9.6, and under the action of the first reset part 9.6.2, the handle part 9.6 can be reset by releasing the handle part 9.6.

[0058] The stop pin 9.4 is provided with a second protrusion 9.4.1, and a second reset part 9.4.2 is arranged around the stop pin 9.4, one end of the second reset part 9.4.2 abuts against the second protrusion 9.4.1, and the other end abuts against the first protrusion 9.6.1, and in the embodiment, when viewed from the cavity 9.1 to the cylinder body 1, the ratchet wheel 9.2 can compress the second reset part 9.4.2 to open the stop pin 9.4 to drive the transmission rod 3 to rotate when the ratchet wheel 9.2 rotates clockwise, so as to push the brake part 10.4 to the braked part, the movement of the transmission rod 3 can be controlled by the ratchet wheel 9.2 without pulling the handle part 9.6, the ratchet wheel 9.2 is limited by the stop pin 9.4 when rotating counterclockwise, if the handle part 9.6 cannot be pulled to lift the stop pin 9.4, the transmission rod 3 cannot rotate to provide stable braking force for the brake part 10.4, and the second reset part 9.4.2 and the second protrusion 9.4.1 are arranged to make the extension of the stop pin 9.4 not only adjustable through the handle part 9.6, so that the adjustment operation of the transmission rod 3 becomes more simple.

[0059] It should be noted that the first reset member 9.6.2 and the second reset member 9.4.2 in the embodiment include but are not limited to a tension spring, a compression spring, and rubber; the hand release device 9 further comprises a limiting pad 18, the limiting pad 18 is provided with a rectangular through hole in the center, the limiting pad 18 is arranged on the cavity 9.1, the lifting part of the handle member 9.6 extends out of the cavity 9.1 through the limiting pad 18, the rotating movement of the handle member 9.6 is limited through the rectangular through hole of the limiting pad 18, the position relationship between the stop pin 9.4 and the ratchet 9.2.1 is more stable, and the phenomenon that the stop pin 9.4 fails to stably limit the ratchet 9.2 from rotating is avoided, so that the rotation of the transmission rod 3 back to the original position causes insufficient braking force.

[0060] Reference Figure 1 、 Figure 12 、 Figure 13 When the hydraulic brake oil cylinder is initially filled with oil, hydraulic oil is filled into the oil inlet 1.1, the oil pressure moves the piston 2 into the cylinder body 1, the piston 2 drives the first transmission member 6 and the first clutch assembly 8.1 to compress the first elastic member 5 to move towards the second end cover, the first clutch member 8.1.1 in the first clutch assembly 8.1 is non-self-locking threaded connected with the transmission rod 3, the first clutch assembly 8.1 has a tendency to move towards the second end cover, the transmission rod 3 is screwed with the second clutch assembly 8.2, and the second transmission member 7 and the second clutch assembly 8.2 have no space to move towards the second end cover, at this time, the second transmission member 7 is limited by the left limiting end of the fourth limiting groove 1.5, the transmission rod 3 cannot be axially displaced and cannot be rotated, so that the tapered surface of the first transmission member 6 and the first clutch member 8.1.1 disengage, the first clutch member 8.1.1 rotates around the transmission rod 3 while keeping synchronous movement with the first transmission member 6 towards the second end cover under the pressure of the second elastic member 8.1.3, until the piston 2 moves to the left limiting end of the first limiting groove 1.2, at this time, the total displacement of the piston 2 is the maximum stroke L.

[0061] When the brake gap is normal, the oil is discharged during braking, the first elastic member 5 relaxes, the piston 2 is pushed by the first transmission member 6 and the first clutch assembly 8.1 to move towards the first end cover, at the same time, the transmission rod 3 is pushed by the first clutch assembly 8.1 to move towards the first end cover, the transmission rod 3 drives the second transmission member 7 and the second clutch assembly 8.2 to move towards the first end cover through the first transmission member 6 and the first clutch assembly 8.1, at the same time, the brake member 10.4 also abuts against the braked member to output braking force. At this time, the gap Y between the brake member 10.4 and the braked member is equal to the axial displacement X of the second transmission member 7 in the fourth limiting groove 1.5 along the transmission rod 3.

[0062] In the case of normal brake clearance, during oil charging and relief, the piston 2 drives the first transmission member 6 and the first clutch assembly 8.1 to compress the first elastic member 5 and move towards the second end cover, while the transmission rod 3 synchronously drives the second transmission member 7 and the second clutch assembly 8.2 to move towards the second end cover; when reaching the relief position, the clearance between the brake member 10.4 and the braked member is still Y, at this time the second transmission member 7 moves to the left limit end of the fourth limiting groove 1.5, and the axial displacement of the second transmission member 7 in the fourth limiting groove 1.5 is still X; during the oil charging and relief process, the brake member 10.4, the piston 2, the transmission rod 3, the first transmission member 6, the first clutch assembly 8.1, the second transmission member 7 and the second clutch assembly 8.2 move synchronously and linearly without relative movement and rotation, and can be considered as a whole to retreat to the relief position.

[0063] In the case of brake clearance greater than the standard clearance, when Y>X due to the wear of the surface of the brake member 10.4 or the braked member, during cylinder oil discharge braking, the second transmission member 7 moves to the right limit end of the fourth limiting groove 1.5, which has been right-shifted by the normal clearance X, at this time the brake member 10.4 has not yet been in contact with the braked member, then the first elastic member 5 pushes the first transmission member 6, the first clutch assembly 8.1, the piston 2 and the transmission rod 3 to continue to right-shift, the transmission rod 3 pulls out the second clutch assembly 8.2 in the second transmission member 7, so that the second transmission member 7 and the tapered surface of the second clutch assembly 8.2.1 are disengaged, and the second clutch assembly 8.2.1 rotates in place under the action of the third elastic member 8.2.3, thereby ensuring that the transmission rod 3 and the second clutch assembly 8.2 in the second transmission member 7 are displaced by L1 towards the first end cover, i.e. the brake member 10.4, the piston 2, the transmission rod 3, the first transmission member 6 and the first clutch assembly 8.1 are collectively displaced by X+L1 towards the first end cover (X+L1≤the maximum stroke L of the piston 2).

[0064] After automatic compensation of the clearance, the brake member 10.4 finally presses the braked member, during oil charging and relief, the piston 2 drives the first transmission member 6 and the first clutch assembly 8.1 to compress the first elastic member 5 and move towards the second end cover, while the transmission rod 3 synchronously drives the second transmission member 7 and the second clutch assembly 8.2 to move towards the second end cover, until the stroke X is reached, at this time the second transmission member 7 moves to the left limit end of the fourth limiting groove 1.5, at this time the second transmission member 7 and the second clutch assembly 8.2 have no retreat space and no longer move, and the transmission rod 3 and the second clutch assembly 8.2.1 cannot retreat either, the transmission rod 3 cannot be axially displaced and cannot rotate; however, under the action of oil pressure, the piston 2, the first transmission member 6 and the first clutch assembly 8.1 still need to retreat, and the stationary transmission rod 3 causes the first clutch assembly 8.1 in the first transmission member 6 to disengage from the tapered surface of the first transmission member 6, the first clutch assembly 8.1 rotates around the transmission rod 3 while keeping the first transmission member 6 and the piston 2 to retreat by the stroke L1, until returning to the initial position.

[0065] When the brake gap is larger than the standard gap, during the oil discharging braking, the transmission rod 3 moves to the first end cover direction with a stroke of X+L1, and during the oil charging relief, the transmission rod 3 is limited to retreat with a stroke of X by the second transmission member 7 and the second clutch assembly 8.2. After the oil discharging braking and the oil charging relief, the transmission rod 3 generates a rotation amount of X+L1-X=L1, which is the automatic adjustment amount (the value is L-X at most) in one time. When Y>X, after several times of oil discharging braking and oil charging relief, the transmission rod 3 is gradually rotated out, so that Y gradually decreases, until Y=X, so that the gap between the brake member 10.4 and the braked member is always kept at a constant value X.

[0066] During the manual relief operation after the oil discharging braking, the oil in the cylinder can be discharged again for the relief, or the manual relief can be performed. During the braking, the brake member 10.4, the piston 2, the transmission rod 3, the first transmission member 6, the first clutch assembly 8.1, the second transmission member 7 and the second clutch assembly 8.2 move to the braking position. The torque generated by the transmission of the braking force in the non-self-locking threaded pair of the first clutch member 8.1.1 and the transmission rod 3 will make the two have a tendency to rotate, the rotation of the first clutch member 8.1.1 is locked by the first tapered groove 6.1 and the third boss on the first transmission member 6, and the rotation of the transmission rod 3 is locked by the stop pin 9.4 through the limiting pin 4 and the ratchet wheel 9.2, so as to ensure the output of the braking force. When the handle member 9.6 is pulled out, the limiting pin 4, the ratchet wheel pin and the ratchet wheel 9.2 can be rotated counterclockwise to make the transmission rod 3 retreat and move left until the relief position, and at the same time, the first transmission member 6 and the first clutch assembly 8.1 drive the piston 2 to move right until the piston limiting surface 11 under the push of the first elastic member 5, so as to realize the manual relief.

[0067] When the gap is adjusted manually, the operator puts the wrench into the hexagonal sink 4.1 of the limiting pin 4 and rotates clockwise, so that the limiting pin 4 drives the ratchet wheel 9.2 to rotate clockwise to drive the stop pin 9.4 to rotate clockwise, and then the transmission rod 3 rotates clockwise to extend the oil cylinder, so that the gap Y between the brake member 10.4 and the braked member becomes smaller. If it is necessary to increase the gap Y, the handle member 9.6 is pulled out, and then the limiting pin 4 is rotated counterclockwise by the wrench, so that the transmission rod 3 rotates counterclockwise to retract the oil cylinder, so that the gap Y increases.

[0068] Finally, it should be noted that: the various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts of each embodiment can be referred to each other.

[0069] The above examples are only used to illustrate the technical solutions of the present application but not to limit the present application; although the present application has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that the specific implementation of the present application can be modified or equivalent replacements can be made to some technical features without departing from the spirit of the technical solutions of the present application, and all of them should be covered in the technical solution range of the present application claimed.

Claims

1. A hydraulic brake cylinder, characterized in that The utility model relates to a cylinder-piston type brake device, comprising: a cylinder, which is provided with an oil inlet communicating inside and outside, and is provided with a first limiting groove, a second limiting groove, a third limiting groove and a fourth limiting groove inside; the cylinder further comprises a first end cover and a second end cover, the first end cover is arranged at one end of the cylinder close to the oil inlet, and one end of the first end cover inside the cylinder is a piston limiting surface; the second end cover is arranged at the other end of the cylinder and closes the second limiting groove, and the fourth limiting groove is arranged inside the second end cover; a piston, which is slidingly arranged in the first limiting groove and separates the inside of the cylinder; the piston cooperates with the piston limiting surface to limit the sliding of the piston outside the cylinder; a transmission rod, which is arranged inside the cylinder and has one end penetrating through the piston to connect a brake assembly; a limiting pin, which is penetratingly arranged in the cylinder and is in transmission connection with the other end of the transmission rod; a first elastic member, which is arranged in the second limiting groove and surrounds the transmission rod; a first transmission member, which is slidingly arranged in the third limiting groove, one end of the first transmission member abutting against the first elastic member, and the other end abutting against the piston; a second transmission member, which is slidingly arranged in the fourth limiting groove, and the distance in the direction of the transmission rod axis in the fourth limiting groove is the stroke of the second transmission member; a clutch assembly, which comprises a first clutch assembly and a second clutch assembly, the first clutch assembly and the second clutch assembly are respectively detachably arranged in the first transmission member and the second transmission member, and are respectively detachably connected with the transmission rod; the first clutch assembly comprises: a first clutch member, which is detachably arranged in the first transmission member and is in non-self-locking threaded connection with the transmission rod, one end of the first clutch member is provided with a first circular cone; a first auxiliary member, which surrounds the first clutch member and abuts against the first circular cone; a second elastic member, which surrounds the first clutch member and abuts against the first auxiliary member; the first transmission member is provided with a first tapered groove, the first transmission member drives the first clutch member to displace through the cooperation of the first tapered groove and the first circular cone; the elastic force of the second elastic member drives the first clutch member to engage with the first tapered groove; the second clutch assembly comprises: a second clutch member, which is detachably arranged in the second transmission member and is in non-self-locking threaded connection with the transmission rod, one end of the second clutch member is provided with a second circular cone; a second auxiliary member, which surrounds the second clutch member and abuts against the second circular cone; a third elastic member, which surrounds the second clutch member and abuts against the second auxiliary member; the second transmission member is provided with a second tapered groove, the second transmission member drives the second clutch member to displace through the cooperation of the second tapered groove and the second circular cone; the elastic force of the third elastic member drives the second clutch member to engage with the second tapered groove; When hydraulic oil is filled through the oil inlet, oil pressure moves the piston to the second end cover direction to drive the first transmission member to compress the first elastic member to move to the second end cover direction; the first elastic member drives the second transmission member to move the maximum stroke in the fourth limiting groove through the first transmission member, the first clutch assembly, the transmission rod and the second clutch assembly; the fourth limiting groove limits the second transmission member from continuing to move with the transmission rod; the second clutch assembly and the second transmission member are separated and rotate in place to make the first elastic member continue to push the transmission rod to continue to extend to compensate for the gap distance.

2. Hydraulic brake cylinder according to claim 1, characterized in that The hand relief device further comprises: a cavity provided on one side of the cylinder body, the limiting pin being provided in the cavity and the cylinder body; a ratchet fixed to one end of the limiting pin; a third auxiliary member surrounding the limiting pin and abutting against the ratchet; a stop pin slidingly provided in the cavity, one end of the stop pin abutting against the ratchet tooth portion of the ratchet.

3. The hydraulic brake cylinder of claim 2, wherein, The hand relief device further comprises a handle member slidingly provided in the cavity, one end of the handle member being provided with a first boss, the stop pin slidingly provided in the first boss, a first return member being provided around the handle member, one end of the first return member abutting against the first boss and the other end abutting against the inner wall of the cavity.

4. The hydraulic brake cylinder of claim 3, wherein, The stop pin is provided with a second boss, a second return member being provided around the stop pin, one end of the second return member abutting against the second boss and the other end abutting against the first boss.

5. The hydraulic brake cylinder of claim 4, wherein, The hand relief device further comprises a limiting pad provided on the cavity, the handle member being provided in the limiting pad, and the rotation of the handle member being limited by the limiting pad.

6. The hydraulic brake cylinder of claim 5, wherein, The brake assembly comprises: a positioning pin; a connecting seat rotationally connected with the transmission rod through the positioning pin; a magnetic member fixed to the connecting seat; a brake member magnetically connected with the magnetic member.

7. The hydraulic brake cylinder of claim 1, wherein, One end of the limiting pin is further provided with a hexagonal sink, the limiting pin is rotated through the hexagonal sink to drive the transmission rod to move to a predetermined position.

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