Electro-hydraulic brake cylinder and its matching brake device

Abstract

The present invention relates to an electro-hydraulic brake cylinder and its supporting brake device, comprising a base part and two connecting parts, wherein the base part is provided with two accommodating chambers, the base part and the first connecting part are combined to form a piston chamber with the corresponding accommodating chamber, and the base part and the second connecting part are combined to form an oil storage chamber with the corresponding accommodating chamber, the base part is an integral structure formed by integral machining, a valve channel is provided on the base part or the second connecting part to form a valve block, a piston rod is guided through the piston chamber, the valve block has an oil inlet passage, two ports of the oil inlet passage are respectively an oil inlet and an oil outlet, an oil return passage is provided between the piston chamber and the oil storage chamber, a pressurized oil pump is provided in the oil storage chamber, a one-way valve is provided in the oil inlet passage, a return oil passage is provided in the valve block, a solenoid valve is connected to the return oil passage, and a brake spring is also installed between the hydraulic cylinder body and the piston rod. The integration degree is very high, the volume is small, the weight is light, the installation is easy, and the maintenance is free.

Description

Technical Field

[0001] The invention relates to the field of brake devices, in particular to an electro-hydraulic brake cylinder and a matching brake device thereof. Background Art

[0002] The brake device in the prior art includes a brake frame and a brake cylinder arranged on the brake frame. The brake cylinder includes a cylinder body and a piston rod arranged in the cylinder body. The output end of the piston rod is connected to the brake arm through transmission. The brake arm is retracted by the extension and contraction of the piston rod. At the same time, a disc spring is sleeved on the piston rod in the cylinder body. The brake cylinder is equipped with a hydraulic control oil circuit. The input end of the hydraulic control oil circuit is connected to the hydraulic station. Under normal working conditions, the hydraulic station supplies oil to the hydraulic control oil circuit. The solenoid valve, one-way valve and other valve group structures in the hydraulic control oil circuit are used to realize oil supply and oil return in the cylinder body, thereby realizing the extension and contraction drive of the piston rod in the cylinder body.

[0003] In actual use, the hydraulic station and the cylinder body are separate structures, connected by external oil pipes, which take up a large space and are very prone to oil leakage, polluting the environment, and subsequent maintenance and cleaning are very troublesome. Summary of the invention

[0004] The purpose of the present invention is to provide an electro-hydraulic brake cylinder to solve the problem in the prior art that the cylinder body and the hydraulic station of the brake cylinder are arranged separately, resulting in large occupied space and easy oil leakage; the purpose of the present invention is also to provide a braking device using the electro-hydraulic brake cylinder.

[0005] In order to solve the above problems, the electro-hydraulic brake cylinder involved in the present invention adopts the following technical solutions:

[0006] The electro-hydraulic brake cylinder includes a base part and two connecting parts. The base part is provided with two accommodating chambers, and the two connecting parts are defined as a first connecting part and a second connecting part. The base part and the first connecting part are combined to form a piston chamber for the corresponding accommodating chamber, and the base part and the second connecting part are combined to form an oil storage chamber for the corresponding accommodating chamber. The base part is an integral structure formed by overall machining. The base part or the second connecting part is provided with a valve channel for connecting the oil storage chamber and the piston chamber, so that the part constitutes a valve block. A piston rod for transmission connection with the brake arm is guided through the piston chamber. The valve channel on the valve block includes an oil inlet channel for connecting the rod chamber of the piston chamber and the oil storage chamber. The two ends of the oil inlet channel are an oil inlet and an oil outlet. There is also a valve for connecting the oil storage chamber and the piston chamber. The cam is provided with a first-stage oil pump, and the second-stage oil pump is provided with a second-stage oil pump rod, the second-stage oil pump rod being installed in the cam block, and the second-stage oil pump rod being provided with a second-stage oil pump rod.

[0007] Furthermore, a valve channel is provided on the base part to form a valve block, and buckle plates are provided on both sides of the bottom wall of the valve block. The buckle plates constitute a connecting part, and the buckle plate on the left and the valve block together form the piston chamber, and the buckle plate on the right and the valve block together form the oil storage chamber, and the return oil channel is arranged on the valve block.

[0008] Furthermore, the electro-hydraulic brake cylinder includes a box body, an oil circuit plate is provided in the middle of the box body, the left side of the oil circuit plate is a left chamber, and the right side is a right chamber, the left chamber is connected to the hydraulic cylinder body to form a piston chamber, and the right chamber is connected to the valve block to form an oil storage chamber, the box body constitutes the base part, the valve block constitutes the second connecting part, and the return oil channel is arranged on the oil circuit plate.

[0009] Furthermore, a pressurized oil port for connecting the piston chamber to the rod chamber is provided on the side wall of the first connecting portion, and an intermediate oil channel is connected between the pressurized oil port and the oil outlet, and the intermediate oil channel is arranged in the oil circuit board.

[0010] Furthermore, the electro-hydraulic brake cylinder includes a housing, a hydraulic cylinder body and a valve block, the housing constitutes the base part, the hydraulic cylinder body constitutes the first connecting part, the valve block constitutes the second connecting part, the hydraulic cylinder body is installed and fixed in the housing, and the side wall of the hydraulic cylinder body is provided with an oil return port for communicating with the housing, and the hydraulic cylinder body is provided with a pressurized oil port for communicating with the rod chamber of the piston chamber at a position outside the housing, and the pressurized oil port is connected to the oil outlet through an external oil pipe.

[0011] Furthermore, the brake spring is a disc spring installed between the piston rod and the base part, or installed between the piston rod and the first connecting part.

[0012] Furthermore, the driving motor is a DC motor or an AC motor.

[0013] Furthermore, a driving handle is sleeved on the motor shaft of the motor for a person to turn to drive the motor shaft to rotate so as to drive the pressurized oil pump to work.

[0014] The braking device involved in the present invention adopts the following technical solutions:

[0015] The braking device includes a brake frame and two brake arms relatively hinged on the brake frame, the ends of the brake arms can be relatively close to achieve braking and move away from each other to release braking, the braking device also includes an electro-hydraulic brake cylinder for driving the two brake arms to move, the electro-hydraulic brake cylinder includes a base part and two connecting parts, the base part is provided with two accommodating chambers, the two connecting parts are defined as a first connecting part and a second connecting part, the base part and the first connecting part are combined to form a piston chamber for the corresponding accommodating chamber, and the base part and the second connecting part are combined to form an oil storage chamber for the corresponding accommodating chamber, the base part is an integral structure formed by overall machining, a valve channel for connecting the oil storage chamber and the piston chamber is provided on the base part or the second connecting part, so that the part constitutes a valve block, the piston chamber is guided by a piston rod that is transmission-connected to the brake arm, and the valve channel on the valve block includes a valve for connecting the piston The cam is provided with an oil return passage which is connected to the oil pump rod and the oil pump for pumping high-pressure oil into the oil inlet passage of the valve block. The cam is provided with an oil return passage which is connected to the oil pump rod and the oil pump for pumping high-pressure oil into the oil inlet passage of the valve block. The cam is provided with an oil return passage which is connected to the oil pump rod and the oil pump for pumping high-pressure oil into the oil inlet passage of the valve block. The cam is provided with an oil return passage which is connected to the oil pump rod and the oil pump for pumping high-pressure oil into the oil inlet passage of the valve block. The cam is provided with an oil return passage which is connected to the oil pump rod and the oil pump for pumping high-pressure oil into the oil inlet passage of the valve block. The cam is provided with an oil return passage which is connected to the oil pump rod and the oil pump for pumping high-pressure oil into the oil inlet passage of the valve block.

[0016] Furthermore, a valve channel is provided on the base part to form a valve block, and buckle plates are provided on both sides of the bottom wall of the valve block. The buckle plates constitute a connecting part, and the buckle plate on the left and the valve block together form the piston chamber, and the buckle plate on the right and the valve block together form the oil storage chamber, and the return oil channel is arranged on the valve block.

[0017] Furthermore, the electro-hydraulic brake cylinder includes a box body, an oil circuit plate is provided in the middle of the box body, the left side of the oil circuit plate is a left chamber, and the right side is a right chamber, the left chamber is connected to the hydraulic cylinder body to form a piston chamber, and the right chamber is connected to the valve block to form an oil storage chamber, the box body constitutes the base part, the valve block constitutes the second connecting part, and the return oil channel is arranged on the oil circuit plate.

[0018] Furthermore, a pressurized oil port for connecting the piston chamber to the rod chamber is provided on the side wall of the first connecting portion, and an intermediate oil channel is connected between the pressurized oil port and the oil outlet, and the intermediate oil channel is arranged in the oil circuit board.

[0019] Furthermore, the electro-hydraulic brake cylinder includes a housing, a hydraulic cylinder body and a valve block, the housing constitutes the base part, the hydraulic cylinder body constitutes the first connecting part, the valve block constitutes the second connecting part, the hydraulic cylinder body is installed and fixed in the housing, and the side wall of the hydraulic cylinder body is provided with an oil return port for communicating with the housing, and the hydraulic cylinder body is provided with a pressurized oil port for communicating with the rod chamber of the piston chamber at a position outside the housing, and the pressurized oil port is connected to the oil outlet through an external oil pipe.

[0020] Furthermore, the brake spring is a disc spring installed between the piston rod and the base part, or installed between the piston rod and the first connecting part.

[0021] Furthermore, the driving motor is a DC motor or an AC motor.

[0022] Furthermore, a driving handle is sleeved on the motor shaft of the motor for a person to turn to drive the motor shaft to rotate so as to drive the pressurized oil pump to work.

[0023] The brake spring is a compression spring connected between two brake arms.

[0024] The beneficial effects of the present invention are as follows: compared with the prior art, the electro-hydraulic brake cylinder involved in the present invention creatively realizes the design of the oil storage chamber and the piston chamber as an integrated structure through the assembly form of the base part and the two connecting parts. In actual use, the driving motor drives the pressurized oil pump rod to work. At this time, the solenoid valve controls the return oil channel to be disconnected. After the high-pressure oil pressurizes the oil in the oil storage chamber, the high-pressure oil is supplied to the rod chamber of the piston chamber through the oil inlet channel of the valve block, thereby forming a pressure difference between the rod chamber and the rodless chamber of the piston chamber, and then pushing the piston rod to retract into the piston cylinder, and the oil in the rodless chamber passes through the return oil channel The oil enters the oil storage chamber for oil compensation. At this time, the brake arm connected to the outer end of the piston rod is forced to open and the brake is released. After the drive motor finishes driving the pressurized oil pump rod, due to the arrangement of the one-way valve, the oil cannot return to the oil storage chamber from the oil inlet channel. At this time, the energy stored in the piston chamber is maintained, and during the maintenance process, the piston rod is in a continuously retracted state. When the solenoid valve controls the reflux oil channel to be connected, the brake spring drives the piston rod to extend, and the piston rod squeezes the high-pressure oil in the rod chamber to return to the oil storage chamber through the reflux oil channel. At this time, the brake arm connected to the outer end of the piston rod is forced to contract to achieve braking.

[0025] The structure of the electro-hydraulic brake cylinder does not require an external hydraulic station, various external control oil circuits and valve body structure, and does not need to occupy a large space. The valve block, piston chamber and oil storage chamber are assembled together through an integrated structure, which can achieve the effect of self-drive and self-control. The leaked oil circulates in the closed system without leaking. The integration level is very high, the size is small, the weight is light, it is easy to install and maintenance-free. At the same time, whether the valve block, the oil tank body and the hydraulic cylinder body can be disassembled or welded or integrally processed to finally form an integrated structure, the processing and assembly are very convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following briefly introduces the drawings required for use in the embodiment:

[0027] Figure 1 It is a structural schematic diagram of a specific embodiment 1 of the electro-hydraulic brake cylinder of the present invention;

[0028] Figure 2 for Figure 1 The structural diagram of the valve block in FIG.

[0029] Figure 3 for Figure 2 A top view of

[0030] Figure 4 for Figure 2 Oil circuit diagram of the middle valve block;

[0031] Figure 5 It is a structural schematic diagram of a specific embodiment 2 of the electro-hydraulic brake cylinder of the present invention;

[0032] Figure 6 It is a structural schematic diagram of a specific embodiment 3 of the electro-hydraulic brake cylinder of the present invention;

[0033] Figure 7 It is a structural schematic diagram of a specific embodiment 4 of the electro-hydraulic brake cylinder of the present invention;

[0034] Figure 8 It is a structural schematic diagram of a specific embodiment 5 of the electro-hydraulic brake cylinder of the present invention;

[0035] Fig. 9 A schematic structural diagram of a safety brake in an embodiment of a braking device of the present invention;

[0036] Fig.10 It is a structural schematic diagram of a wheel brake in an embodiment of a braking device of the present invention;

[0037] Fig.11 It is a schematic structural diagram of an electro-hydraulic rail clamp in an embodiment of the braking device of the present invention.

[0038] Description of the reference numerals: 1-box; 2-fixed mounting portion; 3-oil circuit board; 4-oil mark; 5-piston chamber; 6-oil storage chamber; 7-plug; 8-middle plate; 9-cylinder; 10-piston rod; 11-piston; 12-guide rod; 13-screw; 14-rodless chamber; 15-rod chamber; 16-sleeve; 17-cylinder; 18-annulus; 19-lower step surface; 20-limiting surface; 21-stop edge; 22-disc spring; 23-pressurized oil port; 24-valve block; 2 5-seal ring; 26-gear pump; 27-drive motor; 28-drive handle; 29-cross joint; 30-oil inlet; 31-oil outlet; 32-oil inlet channel; 33-oil return channel; 34-return channel; 35-check valve; 36-solenoid valve; 37-pressure relay; 38-pressure measuring joint; 39-throttle valve; 40-temperature switch; 41-first perforation; 42-second perforation; 43-third perforation; 44-middle oil channel; 45-filter;

[0039] 50-box; 51-perforation; 52-hydraulic cylinder body; 53-connecting hole; 54-interface; 55-oil outlet; 56-oil pipe;

[0040] 60-valve block; 61-piston chamber; 62-oil storage chamber; 63-flat plate; 64-open box; 65-disc spring; 66-limiting nut; 67-fixed hinge; 68-protective cover;

[0041] 71-safety brake; 72-electro-hydraulic rail clamp; 73-wheel brake;

[0042] 80-box; 81-hydraulic cylinder; 82-clamp; 83-intermediate oil circuit board; 84-through hole; 85-oil return port; 86-connector; 87-valve block; 88-oil pipe;

[0043] 90-hydraulic cylinder body; 91-disc spring; 92-guide rod; 93-piston rod. DETAILED DESCRIPTION

[0044] In order to make the technical purpose, technical solution and beneficial effects of the present invention more clear, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0045] A specific embodiment 1 of the electro-hydraulic brake cylinder involved in the present invention is as follows Figure 1-Figure 4 As shown, in this embodiment, the electro-hydraulic brake cylinder includes a box body 1, which is an open box structure with surrounding plates on all sides and a bottom plate at the bottom. The box body constitutes a basic part. A fixed installation part 2 for installing a brake arm is welded and fixed on the outer wall of the bottom plate, and the brake arm can be hinged on the fixed installation part 2. At the same time, an oil mark 4 is also provided on the bottom plate. An oil circuit board 3 is provided at the middle position of the box body 1 to divide the inside of the box body 1 into a left chamber and a right chamber, wherein the left chamber is connected to a hydraulic cylinder body to form a piston chamber 5, and the hydraulic cylinder body constitutes a first connecting part, and the right chamber is connected to a valve block 24 to form an oil storage chamber 6, and the valve block 24 constitutes a second connecting part. The inside of the box body 1 is filled with hydraulic oil, and plugs 7 are provided on the left and right side walls of the box body 1 for filling oil into the box body 1 or discharging oil.

[0046] At the same time, an intermediate plate 8 is provided on the upper cover of the box body 1, and the intermediate plate 8 is fixedly connected to the box body 1 and the oil circuit board 3 by welding. A through hole is provided on the intermediate plate 8 at the position corresponding to the left chamber, and a cylinder barrel 9 is inserted in the through hole. The cylinder barrel 9 and the left side part of the box body 1 are surrounded to form a hydraulic cylinder body. The outer side of the cylinder barrel 9 has an outer step surface facing downward. In the actual installation process, the cylinder barrel 9 is inserted into the left chamber, and the outer step surface is fitted and connected with the intermediate plate 8, thereby realizing the connection between the cylinder barrel 9 and the box body 1.

[0047] A piston rod 10 is guided through the cylinder 9. Specifically, the piston rod 10 includes a piston 11, a guide rod 12 and a screw 13 connected in sequence from bottom to top. The end of the screw 13 constitutes a movable hinge part for hinged cooperation with the brake arm. A rodless cavity 14 is formed between the lower end of the piston 11 of the piston rod 10 and the piston cavity 5, and a rod cavity 15 is formed between the piston and the cylinder 9. At the same time, the guide rod 12 of the piston rod 10 protrudes upward from the cylinder 9.

[0048] The cylinder barrel 9 includes a cylinder body 17 and a sleeve 16 sleeved on the upper part of the cylinder body 17, the two are axially fixed by pins, and a sealing ring is filled between the joint surfaces. The piston rod 10 is guided and installed in the cylinder body 17 from bottom to top, and the lower end of the circumferential side of the piston rod 10 has an upward lower step surface 19, which is blocked and limited between the lower step surface 19 and the limit surface 20 of the inner wall of the cylinder body 17. At the same time, the upper end of the guide rod 12 of the piston rod 10 passes through the upper end of the sleeve 16 and extends upward, and a sealing ring is also provided between the piston 11 of the piston rod 10 and the cylinder body 17 to prevent hydraulic oil from entering the rod cavity 15 from the rodless cavity 14. A stop edge 21 is provided at the upper end portion of the circumferential side of the piston rod 10, and a disc spring 22 is pressed and assembled between the stop edge 21 and the upper end surface of the cylinder body 17. At the same time, a sealing cover is provided on the upper end cover of the sleeve 16, and a sealing ring 25 is filled between the sealing cover and the upper end of the circumferential side of the piston rod 10 to prevent oil from overflowing from the rod cavity 15 to the outside of the sleeve 16.

[0049] Under normal conditions, due to the arrangement of the disc spring 22, the piston rod 10 is pressed upwardly to extend, thereby causing the corresponding brake arm to clamp and brake. Under the pressure of the hydraulic oil, the piston rod 10 will be retracted downwardly in the piston chamber 5, thereby releasing the brake device from braking.

[0050] Specifically, a pressurized oil port 23 is provided on the inner wall of the cylinder body 17 at a position corresponding to the limit surface 20, and an annulus 18 communicating with the pressurized oil port 23 is provided between the limit surface 20 and the lower step surface 19 of the piston rod 10, and a sealing ring 25 is also provided between the side wall of the piston rod 10 below the lower step surface 19 and the cylinder body 17 to prevent oil from overflowing from the annulus 18 into the rodless cavity 14. The high-pressure oil in the oil storage cavity 6 enters the annulus 18 through the pressurized oil port 23, pushes the piston rod 10 downward to move and retract into the piston cavity 5, and then drives the brake arm to open and release the brake.

[0051] For the right chamber, Figure 1As shown, a valve block 24 is fixedly installed above the right chamber of the housing 1. The valve block 24 is fixedly covered by screws on the right side wall of the housing 1 and above the middle oil circuit board 3, so that an oil storage chamber 6 is formed in the middle oil circuit board 3 of the housing 1, the right side wall and the valve block 24, and the valve block 24 and the housing 1 together form an oil tank body 17. A through hole extending in the up-down direction is opened at the center of the valve block 24, and a gear pump 26 is arranged at a position corresponding to the through hole in the oil storage chamber 6. The gear pump 26 constitutes a pressurized oil pump, and the input shaft of the gear pump 26 constitutes a pump rod of the pressurized oil pump. The input shaft is guided and installed in the through hole along the up-down direction, and a cross joint 29 is provided at the upper end of the input shaft. A drive motor 27 is fixed at the upper end of the valve block 24. In this embodiment, the drive motor 27 can be a DC motor or an AC motor, without specific limitation. The motor shaft of the drive motor 27 extends downward into the through hole and is connected to the input shaft of the gear pump 26 through a cross joint 29. Thereby, the motor shaft can rotate to drive the input shaft of the gear pump 26 to rotate, thereby driving the gear pump 26 to work the pump oil.

[0052] In order to be able to control the internal oil circuit of the electro-hydraulic brake cylinder through the structural design of the valve block 24, in the present embodiment, the valve block 24 is provided with a plurality of valve channels, including an oil inlet channel 32 for connecting the rod chamber 15 of the piston chamber 5 and the oil storage chamber 6, the two ends of the oil inlet channel 32 are respectively an oil inlet port 30 and an oil outlet port 31, and also includes an oil return channel 33 connecting the rodless chamber 14 of the piston chamber 5 and the oil storage chamber 6. In the present embodiment, the oil return channel 33 is arranged on the middle oil circuit plate 3 and extends in the left and right directions. That is to say, the gear pump 26 drives the high-pressure oil to enter the rod chamber 15 through the oil inlet channel 32, overcomes the clamping force of the disc spring 22 to press down the piston rod 10, and the oil in the rodless chamber 14 enters the oil storage chamber 6 through the oil return channel 33, thereby realizing the internal self-circulation of the oil.

[0053] In order to realize the control of the hydraulic drive of the piston rod 10, as Figure 3 As shown, a one-way valve 35 is provided in the oil inlet passage 32, and an overflow valve and a pressure relay 37 are connected at the position of the one-way valve 35 of the oil inlet passage 32, and a pressure measuring joint 38 for measuring the oil inlet pressure is also connected; a return oil passage 34 is also provided between the oil inlet 30 and the oil storage chamber 6 in the valve block 24, and the return oil passage 34 is connected with a solenoid valve 36 for controlling the on-off of the return oil passage 34, a throttle valve 39 for the flow size of the return oil passage 34, and a temperature switch 40 for controlling the oil temperature. Figure 3As shown, the oil inlet 30 is eccentrically arranged at the bottom end of the valve block 24 and is connected to the output port of the gear pump 26. A first through hole 41 extending in the left and right directions is arranged at the position corresponding to the oil inlet 30. The middle position of the first through hole 41 is connected to the oil inlet 30, and the two ends are respectively connected to the above-mentioned one-way valve 35 and the overflow valve. The oil outlet 31 is arranged on the left side of the lower end of the valve block 24, and a second through hole 42 extending forward and backward is correspondingly arranged on the valve block 24. One end of the second through hole 42 is connected to the pressure measuring joint 38, and the other end is connected to the pressure measuring joint 38. The first end is connected to a plug, the first through hole 41 is connected to the second through hole 42, the one-way valve 35 is arranged at the connecting point, and the oil outlet 31 is connected to the center position of the second through hole 42; at the same time, a third through hole 43 arranged parallel to the first through hole 41 is also provided on the valve block 24, the left end of the third through hole 43 is connected to the second through hole 42, and the right end is connected to the throttle valve 39 and the solenoid valve 36, one end of the solenoid valve 36 is connected to the oil storage chamber 6; the oil outlet 31 is arranged at a position between the first through hole 41 and the third through hole 43.

[0054] In the actual work process, Figure 4 As shown, when the system is powered on, the drive motor 27 starts, and the solenoid valve 36 is powered at the same time. The solenoid valve 36 controls the reflux oil passage 34 to close, and the hydraulic oil flows into the first perforation 41 through the oil inlet 30, and passes through the one-way valve 35 to the oil outlet 31, and then flows into the hydraulic cylinder body 17 to compress the disc spring 22. When the pressure reaches the set pressure of the pressure relay, the drive motor 27 is powered off, and the energy stored in the hydraulic cylinder is maintained. When the system loses power, the solenoid valve 36 loses power, and the reflux oil passage 34 is opened. The hydraulic oil flows back to the oil storage chamber 6 through the solenoid valve 36, and the hydraulic cylinder outputs thrust to the outside under the thrust of the disc spring 22.

[0055] In order to achieve the communication between the oil outlet 31 and the pressurized oil port 23 on the hydraulic cylinder body 17, in this embodiment, an intermediate oil channel 44 is provided on the intermediate oil circuit board 3. Figure 1 As shown, the intermediate oil passage 44 is a V-shaped structure, with the oil ports at both ends arranged upward, and one end of the oil port is in close contact with the oil outlet 31 on the valve block 24, and the other end of the oil port is in close contact with the pressurized oil port 23 on the hydraulic rod body. The intermediate plate 8 and the box body and the oil circuit plates are welded and fixed to ensure good sealing performance. At this time, the oil ports at both ends of the intermediate oil passage are located on the upper side of the intermediate plate 8.

[0056] Furthermore, in order to ensure continuous purification and filtration of the oil, a filter screen 45 is provided at the outlet of the oil return passage 33 close to the oil storage chamber 6 .

[0057] Furthermore, in this embodiment, in order to facilitate the control of the operator, a driving handle 28 is sleeved on the motor shaft of the motor for the operator to turn to drive the motor shaft to rotate. When the motor is not working, the driving handle 28 can be manually rotated to drive the gear pump 26 to work, thereby driving the piston rod 10 to move.

[0058] In this embodiment, the hydraulic rod body and the oil tank body 17 are designed as an integrated structure, which is mainly achieved by arranging a corresponding valve block 24 and a cylinder body 17 on the top of the overall box body 1 structure. The structure is relatively simple and easy to assemble. At the same time, there is no external oil pipe, the volume is small, and the practicality is high.

[0059] Embodiment 2: In this embodiment, the control mode, control principle and action mode of the oil circuit are basically the same as those in Embodiment 1 and will not be described in detail. Figure 5 As shown, the electro-hydraulic brake cylinder includes a box body 50, and a through hole 51 is provided at the upper left end of the box body 50. A hydraulic cylinder body 52 is fixed in the box body 50. A piston rod is provided inside the hydraulic cylinder body 52. ​​The upper chamber of the hydraulic cylinder body 52 is a rod chamber, and the lower chamber is a rodless chamber. The box body 50 constitutes the base part, and the oil storage chamber is formed inside the box body 50. The hydraulic cylinder body constitutes the first connecting part, and the corresponding valve block constitutes the second connecting part. At the same time, a connecting hole 53 is provided on the side wall of the part of the hydraulic cylinder body 52 located in the box body 50, and the connecting hole 53 realizes the connection between the rodless chamber and the oil storage chamber of the hydraulic cylinder body 52. ​​There is no intermediate oil circuit plate in the box body 50, and the oil return oil channel is directly set on the side wall of the hydraulic cylinder body 52, which is more convenient in design and simpler in assembly. In addition, in order to achieve communication between the oil outlet 55 of the valve block and the pressurized oil port on the hydraulic cylinder body 52, the oil outlet 55 is opened on the left side wall of the valve block, and an interface 54 is welded on the right side wall of the hydraulic cylinder body 52, and the two are connected by an oil pipe 56.

[0060] Embodiment 3: In this embodiment, the control method, control principle and action method of the oil circuit are basically the same as those in Embodiment 1 and are not described in detail. The difference from Embodiment 1 is that Figure 6As shown, the bottom of the valve block 60 is provided with grooves that are concave upward on both sides, and the grooves are covered with buckle plates, wherein the buckle plate on the right side of the groove is an open box 64, and the open box 64 and the valve block 60 are enclosed to form an oil storage chamber 62, and the gear pump is arranged in the open box 64, and the return oil passage is passed through the side wall between the two corresponding grooves on the valve block 60. The buckle plate on the left side of the groove is a flat plate 63, and a fixed hinge 67 is fixed on the flat plate 63. In the embodiment, the fixed hinge 67 and the flat plate 63 are integrally processed and formed, and in other embodiments, they can also be replaced by welding or bolt connection, etc. The flat plate 63 and the groove of the valve block 60 are enclosed to form a piston chamber 61 inside, wherein the valve block constitutes the base part, the flat plate constitutes the first connecting part, and the open box constitutes the second connecting part. The top of the groove is through-through, the piston guide is installed in the groove and extends upward, a rodless cavity is formed between the bottom of the piston rod and the flat plate 63, a rod cavity is formed between the outer edge of the piston rod and the bottom wall of the groove of the valve block 60, and an oil outlet is provided at the right position of the corresponding bottom wall of the groove, and the oil outlet is directly connected to the rod cavity 15. In addition, the disc spring 65 in this embodiment is arranged on the outside of the valve block 60, specifically, a limit nut 66 is sleeved on the upper end of the piston rod, and the disc spring 65 is pressed and assembled between the outer upper end surface of the valve block 60 and the limit nut 66 of the piston rod, and in order to realize the external protection of the disc spring 65, a protective cover 68 is also provided on the outside of the disc spring 65, and the protective cover 68 is a split structure with upper and lower guides inserted, the lower half is fixed between the disc spring 65 and the valve block 60, and the upper half is fixed on the limit nut 66, and can move up and down with the piston rod.

[0061] In this embodiment, the overall structure of the valve block 60 is creatively designed, and the oil storage chamber 62 and the piston chamber are integrated through the structure of the gusset plate. The processing is very convenient, and only the structure of the valve block 60 needs to be designed. Moreover, all the flow channels are located in the valve block 60, avoiding the possibility of oil leakage, and only the sealing between the gusset plate and the valve block 60 needs to be ensured. Moreover, the overall integration is higher and the structure is more compact.

[0062] Embodiment 4: In this embodiment, the control method, control principle and action method of the oil circuit are basically the same as those in Embodiment 2 and are not described in detail. The difference from Embodiment 2 is that Figure 7As shown, the electro-hydraulic brake cylinder includes a box body 80, and a groove is provided on the left side of the box body 80. The groove is connected with the inside of the box body 80, and a hydraulic cylinder body 81 is fixed in the groove. The side wall of the hydraulic cylinder body 81 is sealed with the side wall of the box body 80 to prevent oil from flowing out of the gap between the two. At the same time, in order to ensure the fixed connection between the hydraulic cylinder body 81 and the box body 80, a connecting buckle is provided at the left end of the box body 80, and a clamp 82 is provided on the side wall of the hydraulic cylinder body 81. The clamp 82 and the connecting buckle are connected by bolts to realize the fixation of the hydraulic cylinder body 81 on the box body 80. At the same time, an intermediate oil circuit board 83 is arranged in the middle part of the box body 80, and a through hole 84 extending laterally is provided on the intermediate oil circuit board 83. Correspondingly, an oil return port 85 is provided at the position corresponding to the rodless cavity on the side wall of the hydraulic cylinder body 81. A connector 86 extending laterally is inserted into the oil return port 85, and the other end of the connector 86 is inserted into the through hole 84. The connector 86 and the through hole 84 as well as the connector 86 and the oil return port 85 are sealed to prevent oil leakage. At this time, the part of the box body 80 located on the right side of the intermediate oil circuit board 83 forms an oil storage cavity, and the inner cavity of the hydraulic cylinder body 81 forms a piston cavity. The box body constitutes the base part, the hydraulic cylinder body constitutes the first connecting part, and the valve block constitutes the second connecting part. Thus, the integration between the piston cavity and the oil storage cavity is realized, making the volume smaller and the structure more compact. In addition, the oil inlet on the valve block 87 is arranged on the front side wall of the valve block, and a pressurized oil port is opened on the side wall of the corresponding rod cavity of the corresponding hydraulic cylinder body 81. The pressurized oil port and the oil inlet are connected by an oil pipe 88, and the oil pipe 88 can be made of alloy material or plastic material.

[0063] Embodiment 5, as Figure 8 As shown, the difference from the above-mentioned embodiments is that the disc spring 91 is pressed into the rodless cavity of the piston cavity, the lower end of the piston rod 93 is connected to the guide rod 92, the guide rod 92 has a step surface, and the disc spring 91 is arranged between the lower end inner wall of the hydraulic cylinder body 90 and the step surface of the guide rod 92. At this time, the inner wall of the hydraulic cylinder body 90 can also be used to guide the disc spring 91.

[0064] In addition, in the above-mentioned embodiments, the control of the drive motor can be controlled by an existing controller, and its main control means are consistent with the existing technology, and the specific control scheme can be involved by technical personnel in this field according to the workflow of each component of the hardware device, so no specific limitation is made, such as a PLC controller or a single-chip microcomputer control, etc.

[0065] In other embodiments, the difference from Embodiment 1 is that when an oil circuit board is provided in the middle position of the box body, the middle oil channel can be directly designed to be connected with an oil pipe.

[0066] In other embodiments, the pressure oil pump may also adopt a plunger pump, a centrifugal pump or other structures; the pressure oil pump in the above embodiments is an internal gear pump, and in other embodiments, an external gear pump may also be adopted.

[0067] In other embodiments, the specific structural shape of the valve block and the internal oil path distribution are not specifically limited, and those skilled in the art can arbitrarily design the hydraulic oil flow path according to the above-mentioned embodiments.

[0068] In the above-mentioned embodiments, the extension directions of the hydraulic cylinder body and the oil cylinder body in the electro-hydraulic brake cylinder are arranged side by side in parallel, while in other embodiments, the hydraulic cylinder body and the oil cylinder body may also be arranged in an L-shaped direction, or adopt a back-to-back extension structure.

[0069] In other embodiments, the valve block, the hydraulic cylinder body, the oil cylinder body, etc. may be integrally formed, or the valve block and the oil cylinder body may be integrally formed.

[0070] The embodiment of the brake device involved in the present invention comprises a brake frame and two brake arms relatively hinged on the brake frame, the ends of the brake arms can be relatively close to achieve braking and move away from each other to release the brake, and the brake device also comprises an electro-hydraulic brake cylinder for driving the two brake arms to move, and the structure of the electro-hydraulic brake cylinder is consistent with the structure of the electro-hydraulic brake cylinder in the above-mentioned embodiments, and will not be described in detail. The hydraulic brake device can be applied to various types of brake devices, such as Figure 8 The safety brake 71 shown, Fig. 9 The wheel brake 73 shown and Fig.10 The electro-hydraulic rail clamp 72 and the like shown are not specifically limited.

[0071] In other embodiments, a brake spring may be provided on the brake device to drive the piston rod to extend and drive the brake arm to clamp and brake after the return oil passage is connected. The brake spring may be designed as a compression spring structure other than a disc spring. When designed as a compression spring, it may be connected between the two brake arms, such as Fig.10 In the structure shown, a spring seat extending in a braking direction perpendicular to the brake arm is provided on the brake frame, a compression spring is provided in the spring seat, and transmission is achieved between the two brake arms through a connecting rod mechanism. The middle hinge point of the connecting rod mechanism pushes the upper end of the compression spring. When the piston rod retracts, the two brake arms open outward, and in the process of opening, the compression spring is squeezed downward through the middle hinge point of the connecting rod mechanism, and the compression spring contracts, at which time the brake is released; on the contrary, when the piston rod has no hydraulic thrust, the compression spring pushes the middle hinge point upward, so that the two brake arms are relatively close and tightly fit together to achieve braking.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate but not limit the technical solutions of the present invention, and any equivalent substitutions of the present invention and any modifications or partial substitutions that do not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. Electro-hydraulic brake cylinder, characterized in that: The invention comprises a base part and two connecting parts, wherein the base part is provided with two accommodating chambers, and the two connecting parts are defined as a first connecting part and a second connecting part respectively. The base part and the first connecting part enclose the corresponding accommodating chamber to form a piston chamber, and the base part and the second connecting part enclose the corresponding accommodating chamber to form an oil storage chamber. The base part is an integral structure formed by integral machining. The base part or the second connecting part is provided with a valve channel for connecting the oil storage chamber and the piston chamber to form a valve block. A piston rod for transmission connection with the brake arm is installed in the piston chamber guide. The valve channel on the valve block comprises an oil inlet channel for connecting the rod chamber of the piston chamber and the oil storage chamber. The two ends of the oil inlet channel are an oil inlet and an oil outlet respectively. There is also a valve for connecting the oil storage chamber and the piston chamber between the oil storage chamber and the piston chamber. The rodless chamber of the piston chamber and the return oil passage of the oil storage chamber; a pressurized oil pump is provided in the oil storage chamber for pumping high-pressure oil into the oil inlet passage of the valve block, the pressurized pump rod of the pressurized oil pump is installed in the valve block, and a driving motor is installed on the valve block for cooperating with the pressurized pump rod to drive the pressurized oil pump to pump oil. A one-way valve is provided in the oil inlet passage, and the valve passage on the valve block also includes a reflux oil passage connecting the oil outlet and the oil storage chamber, and a solenoid valve for controlling the opening and closing of the reflux oil passage is connected to the reflux oil passage. When the pressurized oil pump rod is working, the high-pressure oil controls the piston rod to retract into the piston chamber to drive the brake arm to open and release the brake, and a brake spring is also installed between the piston rod and the base part, or between the piston rod and the first connecting part, for driving the piston rod to extend after the reflux oil passage is connected to drive the brake arm to clamp the brake.

2. The electro-hydraulic brake cylinder according to claim 1, characterized in that: The base part is provided with a valve channel to form a valve block, and the left and right sides of the bottom wall of the valve block are covered with buckle plates, and the buckle plates constitute a connecting part. The left buckle plate and the valve block together form the piston chamber, and the right buckle plate and the valve block together form the oil storage chamber. The return oil channel is arranged on the valve block.

3. The electro-hydraulic brake cylinder according to claim 1, characterized in that: The electro-hydraulic brake cylinder includes a box body, an oil circuit board is provided in the middle of the box body, the left side of the oil circuit board is a left chamber, and the right side is a right chamber, the left chamber is connected to the hydraulic cylinder body to form a piston chamber, and the right chamber is connected to the valve block to form an oil storage chamber, the box body constitutes the base part, the valve block constitutes the second connecting part, and the return oil channel is arranged on the oil circuit board.

4. The electro-hydraulic brake cylinder according to claim 3, characterized in that: A pressurized oil port for connecting the piston chamber to the rod chamber is provided on the side wall of the first connecting portion, and an intermediate oil passage is connected between the pressurized oil port and the oil outlet, and the intermediate oil passage is arranged in the oil circuit board.

5. The electro-hydraulic brake cylinder according to claim 1, characterized in that: The electro-hydraulic brake cylinder includes a housing, a hydraulic cylinder body and a valve block, the housing constitutes the base part, the hydraulic cylinder body constitutes the first connecting part, the valve block constitutes the second connecting part, the hydraulic cylinder body is installed and fixed in the housing, and a return oil port for communicating with the housing is provided on the side wall of the hydraulic cylinder body. A pressurized oil port for communicating with the rod chamber of the piston chamber is provided at a position outside the housing of the hydraulic cylinder body, and the pressurized oil port is connected to the oil outlet via an external oil pipe.

6. The electro-hydraulic brake cylinder according to any one of claims 1 to 5, characterized in that: The brake spring is a disc spring installed between the piston rod and the base part, or installed between the piston rod and the first connecting part.

7. The electro-hydraulic brake cylinder according to any one of claims 1 to 5, characterized in that: The driving motor is a DC motor or an AC motor.

8. The electro-hydraulic brake cylinder according to claim 7, characterized in that: The motor shaft of the motor is sleeved with a driving handle for people to turn to drive the motor shaft to rotate so as to drive the pressurized oil pump to work.

9. A brake device, comprising a brake frame and two brake arms relatively hinged to the brake frame, the ends of the brake arms can be relatively close to each other to achieve braking and move away from each other to release braking, the brake device also includes an electro-hydraulic brake cylinder for driving the two brake arms to move, characterized in that: The electro-hydraulic brake cylinder includes a base part and two connecting parts. The base part is provided with two accommodating chambers, and the two connecting parts are defined as a first connecting part and a second connecting part. The base part and the first connecting part are combined to form a piston chamber for the corresponding accommodating chamber, and are combined with the second connecting part to form an oil storage chamber for the corresponding accommodating chamber. The base part is an integral structure formed by overall machining. The base part or the second connecting part is provided with a valve channel for connecting the oil storage chamber and the piston chamber to form a valve block. A piston rod connected to the brake arm is guided through the piston chamber. The valve channel on the valve block includes an oil inlet channel for connecting the rod chamber of the piston chamber and the oil storage chamber. The two ends of the oil inlet channel are an oil inlet and an oil outlet. The oil storage chamber and The cam is provided with a plurality of control rods, each of which ...

10. The braking device according to claim 9, characterized in that: The brake spring is a compression spring connected between two brake arms.

Images