Electric control clutch booster with shift control valve

Abstract

The present invention relates to the technical field of clutch boosters, in particular to an electronically controlled clutch booster with a shift control valve, which includes a booster body. The booster body includes a cylinder block at the front end. A piston is arranged in the cylinder block. A push rod is connected to the piston, and the distal end of the push rod passes through a relief hole provided at the front end of the cylinder block to the outside and forms an operating end. The piston divides the interior of the cylinder block into a front cavity on the front side of the piston and a rear cavity on the rear side of the piston. An air inlet passage is provided on the cylinder block and communicates with the front cavity. An air inlet hole and an air return hole are also provided on the cylinder block and each communicates with the rear cavity. The present invention has the characteristics of a simpler and more reasonable structural design, being able to better control the entry or discharge of compressed air into or out of the clutch booster cylinder, and being able to better achieve the automatic separation and engagement of the clutch.

Description

Technical Field

[0001] The present invention relates to the technical field of clutch boosters, and particularly to an electronically controlled clutch booster with a shift control valve. Background Art

[0002] To reduce the labor intensity of drivers in operating the clutch and ensure driving safety, clutch boosters are currently commonly used in small and medium-sized automobiles. An automotive clutch booster is a key component to ensure vehicle safety. When the clutch pedal is depressed, the hydraulic oil pressed out from the clutch master cylinder enters the cylinder of the booster through a oil pipe, and the vehicle's compressed air source is used to provide assistance for the clutch. However, the clutch control method in the prior art is single and cannot achieve rapid and precise separation and engagement, thus there are certain potential safety hazards.

[0003] Currently, commercial vehicle clutch boosters mainly act through the combined action of two media, brake fluid and compressed air: by stepping on the clutch pedal, the brake fluid in the clutch master cylinder is pushed into the clutch booster, causing the brake fluid to generate hydraulic pressure, and then the hydraulic pressure will open the valve of the clutch booster, and the compressed air enters the clutch booster through the valve to assist in separating the clutch. This type of clutch booster with this working method generally has a high failure rate in the market, and seriously affects the driving comfort of the driver. The product is difficult to repair, and the brake fluid used will also cause environmental pollution.

[0004] Currently, in the prior patented technology, the invention patent with the application number (2019206985895) discloses an automotive electronically controlled automatic clutch booster device. In the structure of this patent, through driving methods such as motors or electromagnets, the displacement and speed of clutch separation and engagement are controlled in real time, greatly improving the automatic control accuracy and response speed. However, there are still defects that it cannot maintain the open or closed state for a long time, thus greatly reducing the coil life.

[0005] Therefore, how to provide an electronically controlled clutch booster with a shift control valve that has a simpler and more reasonable structural design, can better control the entry or discharge of compressed air into or out of the clutch booster cylinder, and can better achieve the automatic separation and engagement of the clutch has become a technical problem to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to provide an electronically controlled clutch booster with a shift control valve that has a simpler and more reasonable structural design, can better control the entry or discharge of compressed air into or out of the clutch booster cylinder, and can better achieve the automatic separation and engagement of the clutch.

[0007] To achieve the above object, the present invention provides an electronically controlled clutch booster with a shift control valve, including a booster body. The booster body includes a cylinder block at the front end. A piston is arranged in the cylinder block. A push rod is connected to the piston, and the distal end of the push rod passes through a relief hole provided at the front end of the cylinder block to the outside and forms an operating end. The piston divides the interior of the cylinder block into a front cavity in front of the piston and a rear cavity behind the piston. An air inlet passage is provided on the cylinder block and communicates with the front cavity. An air inlet hole and a return air hole are also provided on the cylinder block and each communicates with the rear cavity. The booster body further includes a housing at the rear end, and the inner cavity of the housing communicates with the air inlet passage. A rear air inlet passage and a rear return air passage are provided on the housing. The front ends of the rear air inlet passage and the rear return air passage respectively communicate with the air inlet hole and the return air hole. An air inlet control solenoid valve and a return air control solenoid valve are respectively provided corresponding to the rear air inlet passage and the rear return air passage. An air inlet, an exhaust port, an air outlet and a return air discharge port are provided on the housing. The rear end of the rear return air passage communicates with the return air discharge port. A two-way three-way valve is also provided on the housing, and the two control positions of the two-way three-way valve can respectively connect the air inlet and the rear air inlet passage and connect the air inlet and the air outlet.

[0008] Further, an exhaust valve assembly is installed on the exhaust port.

[0009] In this way, when the above electronically controlled clutch booster with a shift control valve is working, gas enters from the air inlet. The two control positions of the two-way three-way valve provided on the housing can respectively connect the air inlet and the rear air inlet passage and connect the air inlet and the air outlet. When the two-way three-way valve is in one of the control positions, the air inlet communicates with the air outlet, and the gas is directly discharged to the outside, and no action is performed at this time. When the two-way three-way valve is in the other control position, the air inlet communicates with the rear air inlet passage on the housing. At this time, the air inlet control solenoid valve is opened, so that the gas can enter the rear cavity and push the piston forward. The piston drives the push rod to move forward and completes the work. At the same time, the gas in the front cavity sequentially passes through the air inlet passage and the return air hole, enters the inner cavity of the housing, and can be discharged from the exhaust port on the housing. After that, the air inlet control solenoid valve is closed, the return air control solenoid valve is opened, the air inlet continues to intake air and enters the inner part of the housing cavity. The gas enters through the air inlet hole and passes through the air inlet passage into the front cavity, and pushes the piston backward. The piston drives the push rod to move backward. At the same time, the gas in the rear cavity passes through the return air hole and the rear return air passage and is discharged to the outside from the return air discharge port.

[0010] The above structure has the characteristics of being able to automatically control the intake or discharge of compressed air into the clutch booster cylinder without using brake fluid and the driver operating the clutch pedal, so as to realize the automatic separation and engagement of the clutch.

[0011] Further, an exhaust nozzle is also installed on the housing, and the intake and exhaust ends of the exhaust nozzle are communicated with the rear air return passage. This makes it more convenient for exhaust.

[0012] As an optimization, an axially arranged and outwardly protruding front air intake convex edge is provided on the outer peripheral wall of the cylinder block; the front air intake passage includes front air intake through holes arranged axially on the front air intake convex edge, and the front end of the front air intake through holes is communicated with the front cavity; a radially arranged front air intake connection hole is provided on the end wall at the rear end of the cylinder block, the outer end of the front air intake connection hole is communicated with the front air intake through hole, and the inner end of the front air intake connection hole is communicated with the inside of the housing.

[0013] In this way, the structural design of the cylinder block is more reasonable, and it is better to process the front air intake through holes on the cylinder block. And the structural design of the entire front air intake passage is more reasonable and the distance is shorter.

[0014] As an optimization, three connection holes are provided on the rear end face inside the cylinder block in a triangular distribution, connection screws are respectively provided in the connection holes, and the threaded ends of the connection screws respectively pass through the connection holes and are respectively connected and arranged in the threaded holes provided on the inner side surface of the housing; and a sealing ring is provided inside the screw head of the connection screw.

[0015] In this way, it is more convenient to connect and fix the housing and the cylinder block. The two are independent of each other and can be processed and manufactured separately and then assembled, and the structural design is more reasonable.

[0016] As an optimization, the piston includes a piston body at the front end and a piston rod connected to the rear end of the piston body; a spiral spring is sleeved on the piston rod, and both ends of the spiral spring respectively abut and support on the rear end of the piston body and the rear end inside the cylinder block; and the piston rod extends backward and passes through a through hole provided at the rear end of the cylinder block to the outside, and there is a placement convex rod protruding backward inside the housing, a placement hole designed in a blind hole structure is provided on the placement convex rod, and the piston rod extends into the placement hole after passing through the through hole provided at the rear end of the cylinder block; a sealing ring is provided between the placement hole and the rear end face of the cylinder block; an induction magnet is provided on the piston rod, and a Hall sensor is provided on the housing.

[0017] In this way, the structural design of the piston is more simple and reasonable; and by using the induction magnet and the Hall sensor provided on the piston rod to cooperate with each other, it can better sense and judge the position of the piston in the cylinder block, and the work is more reliable. And by providing a placement convex rod inside the housing, after the piston rod extends backward and passes through the through hole at the rear end of the cylinder block, it then extends into and cooperates with the placement hole provided on the placement convex rod, so that the piston rod cooperates with the holes on the cylinder block and the housing, improving the movement accuracy of the piston rod and better avoiding its displacement in the radial direction, so as to more accurately obtain its axial movement position and distance.

[0018] As an optimization, on the inner and outer sides corresponding to the position of the through hole at the rear end of the cylinder block, there are convex portions inward and outward respectively, so that the overall forms a cylindrical installation cylinder. A sealing ring is arranged between the outer end face of the installation cylinder and the housing; on the inner peripheral wall of the inner end of the installation cylinder, there is an installation groove and a sealing ring is provided.

[0019] In this way, by integrally forming the installation cylinder on the cylinder block, it is more convenient for the sealing between the piston rod and the cylinder block, and it is also more convenient for the housing to be installed on the cylinder block.

[0020] As an optimization, there is an installation hole on the outer end face of the piston rod. The induction magnet includes a first magnetic steel, a permanent magnet, and a second magnetic steel that are inserted and installed in sequence from the inside to the outside in the installation hole; at the outer end of the installation hole, there is also a retaining ring with an overall annular structure design. The retaining ring is supported against the outer end of the second magnetic steel to prevent the second magnetic steel from coming out of the outer end of the installation hole.

[0021] In this way, it is more convenient for the installation and arrangement of the induction magnet. And the induction magnet is composed of a first magnetic steel, a permanent magnet, and a second magnetic steel, which has the advantage of reducing costs.

[0022] As an optimization, the piston body and the piston rod are integrally formed; in the middle of the front end surface of the piston body, there is a cushion block installation hole and a cushion block is installed correspondingly. The end of the push rod is provided with a connecting ball head, and the outer surface of the cushion block is an inwardly concave spherical surface and can be in contact and supported against the inner side of the connecting ball head; and a telescopic dust-proof cover is sleeved outside the push rod.

[0023] In this way, the piston body and the piston rod are integrally formed, with better integrity and higher position accuracy between the two. And by providing a cushion block installation hole in the middle of the front end surface of the piston body and installing a cushion block correspondingly, the push rod is in contact and cooperates with the inwardly concave spherical surface of the outer surface of the cushion block, with a larger contact area, which better protects the piston body.

[0024] As an optimization, on the outer side surface of one end of the housing adjacent to the cylinder block, there are two connecting columns, and the Hall sensor is fixedly connected by screws to the two paired connecting columns.

[0025] In this way, by providing two connecting columns for installing the Hall sensor, it is more convenient for the installation and arrangement of the Hall sensor.

[0026] As an optimization, annular installation grooves are respectively provided on the outer circumferential surfaces at both ends of the piston body and sealing rings are installed; between the two installation grooves on the piston body, there is an annular assembly groove, and a Y-shaped sealing ring is provided in the assembly groove.

[0027] In this way, by providing a sealing ring and a Y-shaped sealing ring on the piston body, the sealing between the piston body and the cylinder block is more reliable.

[0028] As an optimization, the cylinder body includes a cylinder body shell with an overall cylindrical structure design and an open front end design, and a cylinder body cover body is connected and fixed to the open end of the cylinder body shell; and the open end of the cylinder body shell has a circle of connecting disk formed by vertically bending outward, and the cylinder body cover body is detachably fixed to the connecting disk by fixing screws; mounting connection holes are also provided at the four corner positions of the cylinder body cover body, and the mounting connection holes are set through the connecting disk.

[0029] In this way, the structural design of the cylinder body is simpler and more reasonable, and is more convenient to process and manufacture.

[0030] As an optimization, a sealing ring is provided between the connecting plate and the cylinder cover.

[0031] In this way, by providing a sealing ring between the connecting plate and the cylinder cover, air leakage between the two can be better avoided.

[0032] As an optimization, the shell includes an outer shell with an overall box-shaped structure and open on one side. A shell cover is fixed to the open end of the outer shell. The inner side of the shell cover has two mounting protrusions arranged at intervals. A first mounting fitting hole and a second mounting fitting hole are respectively provided in pairs at both ends of the inner surface of the mounting protrusion, and the intake control solenoid valve and the return air control solenoid valve are respectively provided in the paired first mounting fitting holes and the second mounting fitting holes.

[0033] In this way, the structural design of the housing is simpler, and it is more convenient to install and set the air intake control solenoid valve and the air return control solenoid valve.

[0034] As an optimization, the exhaust port is arranged at the center of one side surface of the shell; the air inlet, the air outlet and the two-position three-way valve are all arranged on the distal end surface of the shell.

[0035] In this way, the arrangement of the exhaust port, the air inlet, the air outlet and the two-position three-way valve is more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of an electronically controlled clutch booster with a shift control valve in a specific embodiment of the present invention.

[0037] Figure 2 yes Figure 1 Schematic diagram of the structure after rotation by an angle.

[0038] Figure 3 yes Figure 1 Schematic diagram of the structure after omitting the housing and two-position three-way valve.

[0039] Figure 4 yes Figure 1 Schematic diagram of the structure after omitting the shell cover.

[0040] Figure 5 is Figure 1 the end face schematic diagram of

[0041] Figure 6 is Figure 5 the A-A sectional view schematic diagram of

[0042] Figure 7 is Figure 5 the B-B sectional view schematic diagram of

[0043] Figure 8 is Figure 7 the partial enlarged schematic diagram of position C in

[0044] Figure 9 is Figure 7 the partial enlarged schematic diagram of position D in

[0045] Figure 10 is Figure 1 the side view schematic diagram of

[0046] Figure 11 is Figure 10 the E-E sectional view schematic diagram of

[0047] Figure 12 is Figure 1 the sectional view schematic diagram of the two-position three-way valve in

[0048] Figure 13 is Figure 12 the partial enlarged schematic diagram of position F in

[0049] Figure 14 is Figure 12 the structural schematic diagram of the valve stem in Detailed implementation manner

[0050] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific manner, and therefore should not be construed as a limitation of the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0051] Such as Figure 1 and Figure 14As shown in the figure, an electronically controlled clutch booster with a shift control valve includes a booster body. The booster body includes a cylinder block 1 at the front end. A piston 2 is arranged inside the cylinder block. A push rod 3 is connected to the piston, and the distal end of the push rod passes through a relief hole in the front end of the cylinder block to the outside and forms an operating end. The piston divides the interior of the cylinder block into a front cavity 4 on the front side of the piston and a rear cavity 5 on the rear side of the piston. An air inlet passage 6 is provided on the cylinder block and is communicated with the front cavity. An air inlet hole 7 and a return air hole 8 are also provided on the cylinder block and are respectively communicated with the rear cavity. The booster body further includes a housing 9 at the rear end, and the inner cavity of the housing is communicated with the air inlet passage. A rear air inlet passage and a rear return air passage are provided on the housing. The front ends of the rear air inlet passage and the rear return air passage are respectively communicated with the air inlet hole and the return air hole. An air inlet control solenoid valve 10 and a return air control solenoid valve 11 are respectively provided corresponding to the rear air inlet passage and the rear return air passage. An air inlet 12, an exhaust port 13, an air outlet 14 and a return air discharge port 15 are provided on the housing. The rear end of the rear return air passage is communicated with the return air discharge port. A two-position three-way valve 16 is also provided on the housing, and the two control positions of the two-position three-way valve can respectively communicate the air inlet and the rear air inlet passage and communicate the air inlet and the air outlet.

[0052] Further, an exhaust valve assembly is installed on the exhaust port.

[0053] In this way, when the above-mentioned electronically controlled clutch booster with a shift control valve works, gas enters from the air inlet, and the two control positions of the two-position three-way valve provided on the housing can respectively communicate the air inlet and the rear air inlet passage and communicate the air inlet and the air outlet. When the two-position three-way valve is in one of the control positions, the air inlet is communicated with the air outlet, and the gas is directly discharged to the outside, and no action is performed at this time. When the two-position three-way valve is in the other control position, the air inlet is communicated with the rear air inlet passage on the housing. At this time, the air inlet control solenoid valve is opened, so that the gas can enter the rear cavity and push the piston forward. The piston drives the push rod to move forward and completes the work. At the same time, the gas in the front cavity enters the inner cavity of the housing after passing through the air inlet passage and the return air hole in sequence, and can be discharged from the exhaust port on the housing. Then, the air inlet control solenoid valve is closed, the return air control solenoid valve is opened, the air inlet continues to intake air and enters the inner part of the housing cavity. The gas enters through the air inlet hole and passes through the air inlet passage into the front cavity, and pushes the piston backward. The piston drives the push rod to move backward. At the same time, the gas in the rear cavity passes through the return air hole and the rear return air passage and is discharged to the outside from the return air discharge port.

[0054] The above structure has the characteristics that it can automatically control the compressed air to enter or discharge the clutch booster cylinder without using brake fluid and the driver operating the clutch pedal, so as to realize the automatic separation and engagement of the clutch.

[0055] Furthermore, an exhaust nozzle 17 is also installed on the housing, and the intake and exhaust ends of the exhaust nozzle communicate with the rear air return passage. This makes it more convenient to exhaust air.

[0056] In this specific embodiment, an axially arranged and outwardly protruding front air intake convex edge 18 is provided on the outer peripheral wall of the cylinder block; the front air intake passage includes front air intake through holes 19 arranged on the front air intake convex edge and arranged axially, and the front end of the front air intake through holes communicates with the front cavity; a radially arranged front air intake connection hole 20 is provided on the rear end wall of the cylinder block, the outer end of the front air intake connection hole communicates with the front air intake through holes, and the inner end of the front air intake connection hole communicates with the interior of the housing.

[0057] In this way, the structural design of the cylinder block is more reasonable, and it is possible to better machine the front air intake through holes on the cylinder block. And the structural design of the entire front air intake passage is more reasonable and the distance is shorter.

[0058] In this specific embodiment, three connection holes are arranged in a triangular distribution on the rear end face inside the cylinder block, connection screws 21 are respectively arranged in the connection holes, and the threaded ends of the connection screws respectively pass through the connection holes and are respectively connected and arranged in threaded holes provided on the inner side surface of the housing; and a sealing ring is provided inside the screw head of the connection screw.

[0059] In this way, it is more convenient to connect and fix the housing and the cylinder block. The two are independent of each other and can be processed and manufactured separately and then assembled, and the structural design is more reasonable.

[0060] In this specific embodiment, the piston includes a piston body 22 at the front end and a piston rod 23 connected to the rear end of the piston body; a spiral spring 24 is sleeved on the piston rod, and both ends of the spiral spring respectively abut and support on the rear end of the piston body and the rear end inside the cylinder block; and the piston rod extends backward and passes through a through hole provided at the rear end of the cylinder block to the outside. There is a rearwardly protruding placement convex rod 25 inside the housing. The placement convex rod is provided with a placement hole designed as a blind hole structure, and the piston rod extends into the placement hole after passing through the through hole provided at the rear end of the cylinder block; a sealing ring is provided between the placement hole and the rear end face of the cylinder block; an induction magnet 26 is provided on the piston rod, and a Hall sensor 27 is provided on the housing.

[0061] In this way, the structural design of the piston is simpler and more reasonable; and by using the induction magnet and the Hall sensor provided on the piston rod to cooperate with each other, it is possible to better sense and judge the position of the piston in the cylinder block, and the work is more reliable. And by providing a placement convex rod inside the housing, after the piston rod extends backward and passes through the through hole at the rear end of the cylinder block, it then extends into and fits into the placement hole provided on the placement convex rod, so that the piston rod is matched with the holes on the cylinder block and the housing, improving the moving accuracy of the piston rod and better avoiding its displacement in the radial direction, so as to more accurately obtain its axial moving position and distance.

[0062] In this specific embodiment, at the rear end of the cylinder body and corresponding to the position of the through hole, the inner and outer sides are respectively protruded inward and outward to form a mounting cylinder 28 with a cylindrical structure as a whole. The sealing ring is provided between the outer end face of the mounting cylinder and the shell; and a mounting groove and a sealing ring are provided on the inner circumferential wall of the inner end of the mounting cylinder.

[0063] In this way, by integrally forming the mounting tube on the cylinder body, the sealing between the piston rod and the cylinder body is more convenient, and the housing is more convenient to be mounted on the cylinder body.

[0064] In this specific embodiment, a mounting hole is provided on the outer end surface of the piston rod, and the induction magnet includes a first magnet 29, a permanent magnet 30 and a second magnet 31 inserted and installed in the mounting hole from the inside to the outside; a retaining ring with an overall annular structure is also provided at the outer end of the mounting hole, and the retaining ring is supported on the outer end of the second magnet to prevent the second magnet from escaping from the outer end of the mounting hole.

[0065] In this way, the installation and arrangement of the induction magnet is more convenient. Moreover, the induction magnet is composed of the first magnetic steel, the permanent magnet and the second magnetic steel, which has the advantage of reducing costs.

[0066] In this specific embodiment, the piston body and the piston rod are integrally formed; a pad installation hole is provided in the middle of the front end surface of the piston body and a pad 32 is installed correspondingly, a connecting ball head 33 is provided at the end of the push rod, and the outer surface of the pad is a concave spherical surface and can abut and support the inner side of the connecting ball head; and a telescopic dust cover is provided on the outside of the push rod.

[0067] In this way, the piston body and piston rod are integrally formed, achieving better integrity and higher positioning accuracy between the two. Furthermore, by providing a pad receiving hole in the middle of the front end surface of the piston body and installing a corresponding pad, the push rod abuts against the concave spherical surface of the pad's outer surface, increasing the mating area and better protecting the piston body.

[0068] In this specific embodiment, two connecting posts 34 are provided on the outer side of one end of the housing adjacent to the cylinder body, and the Hall sensor is fixed to the two connecting posts provided in pairs by screw connection.

[0069] In this way, by providing two connecting columns and using them to install and arrange the Hall sensor, it is more convenient to install and arrange the Hall sensor.

[0070] In this specific embodiment, an annular mounting groove is provided on the outer circumferential surface at both ends of the piston body and a sealing ring 35 is installed therein; an annular assembly groove is provided between the two mounting grooves on the piston body, and a Y-shaped sealing ring 36 is provided in the assembly groove.

[0071] In this way, by providing a sealing ring and a Y-shaped sealing ring on the piston body, the sealing between the piston body and the cylinder block becomes more reliable.

[0072] In this specific embodiment, the cylinder block includes a cylinder block housing 37 with an overall cylindrical structure design and an open front end. A cylinder block cover 38 is fixedly connected to the open end of the cylinder block housing. The open end of the cylinder block housing has a connecting disk 39 formed by bending vertically outward in a circle. The cylinder block cover is detachably connected and fixed to the connecting disk by fixing screws. Mounting connection holes 40 are also provided at the four corner positions of the cylinder block cover, and the mounting connection holes penetrate through the connecting disk.

[0073] In this way, the structural design of the cylinder block is simpler and more reasonable, and it is more convenient for processing and manufacturing.

[0074] In this specific embodiment, a sealing ring is provided between the connecting disk and the cylinder block cover.

[0075] In this way, by providing a sealing ring between the connecting disk and the cylinder block cover, air leakage between the two can be better avoided.

[0076] In this specific embodiment, the housing includes an outer housing 41 with an overall box structure design and an open side. A housing cover 42 is fixedly installed at the open end of the outer housing. The inner side of the housing cover has two spaced-apart mounting protrusions. At both ends of the inner surface of the mounting protrusions, a first mounting mating hole and a second mounting mating hole are respectively provided in pairs, and the intake control solenoid valve and the exhaust control solenoid valve are respectively provided in the paired first mounting mating hole and second mounting mating hole.

[0077] In this way, the structural design of the housing is simpler, and it is more convenient to install and set the intake control solenoid valve and the exhaust control solenoid valve.

[0078] In this specific embodiment, the exhaust port is provided at the center position of one side surface of the housing; the intake port, the outlet port, and the two-way three-way valve are all provided on the distal end surface of the housing.

[0079] In this way, the arrangement of the exhaust port, the intake port, the outlet port, and the two-way three-way valve is more reasonable.

[0080] Such as Figure 12 、 13As shown in FIGS. 13 and 14, in this specific embodiment, the two-position three-way valve includes a valve body 43; an installation cavity is provided on the valve body, and a valve core is installed in the installation cavity; the valve core includes an electromagnetic valve core rod 44, and a placement hole with a blind hole structure design is provided on the front end face of the electromagnetic valve core rod. A valve rod 45 is provided in the placement hole; and a communication hole 46 axially penetrating is provided at the bottom of the blind hole, and the outer end of the communication hole is communicated with the rear air inlet passage on the housing through a communication air passage 47 provided on the valve body; a connection hole 48 is provided on the inner end face of the installation cavity, and the upper and lower ends of the connection hole are respectively communicated with the air inlet and air outlet on the housing through a first passage 49 and a second passage 50 provided on the valve body; a spring thrust structure is provided on the valve rod so that the valve rod can move inward and abut against the inner end of the connection hole to form a seal, so that the outer end of the valve rod is spaced from the inner end of the communication hole; an electric connection plug 51 is provided on the valve body, and the electric connection plug is electrically connected to the electromagnetic valve core rod. After the electromagnetic valve core rod is powered on, the valve rod can overcome the thrust of the spring thrust structure and move towards the electromagnetic valve core rod, so that the outer end of the valve rod seals the inner end of the communication hole.

[0081] In this way, when the two-position three-way valve works, after the electromagnetic valve core rod is powered on, the valve rod can overcome the thrust of the spring thrust structure and move towards the electromagnetic valve core rod, so that the outer end of the valve rod seals the inner end of the communication hole. At this time, the air inlet enters and passes through the connection hole and then is discharged from the air outlet. When the electromagnetic valve core rod is powered off, the spring thrust structure can push the valve rod inward to abut against the inner end of the connection hole to form a seal, and the outer end of the valve rod is spaced from the inner end of the communication hole; the air inlet enters through the space between the valve rod and the blind hole, passes through the communication hole, enters the communication air passage on the valve body, and finally enters the rear air inlet passage on the housing. The above two-position three-way valve has a simpler structural design and can better realize the characteristics of two positions and three ways.

[0082] In this specific embodiment, a first placement blind hole is provided at the inner end of the electromagnetic valve rod, and a first sealing pad 52 is provided in the first placement blind hole.

[0083] In this way, by designing the first sealing pad, the reliability of the seal can be improved.

[0084] In this specific embodiment, a mating protrusion 53 protruding is provided at the middle position of the inner end face of the installation cavity, and the connection hole is provided in the middle of the mating protrusion.

[0085] In this way, by designing the mating protrusion, the first sealing pad can better abut against the mating protrusion to complete the seal and better improve the sealing effect.

[0086] In this specific embodiment, a second placement blind hole is provided at the outer end of the electromagnetic valve rod, and a second sealing pad 54 is provided in the second placement blind hole.

[0087] In this way, by designing the second sealing pad, the reliability of the seal can be improved.

[0088] In this specific embodiment, a ring-shaped relief groove 55 is provided on the bottom surface of the blind hole and corresponding to the outside of the communication hole.

[0089] In this way, by designing a ring-shaped relief groove, the second sealing pad can seal the communication hole.

[0090] In this specific embodiment, the electrical connection plug is installed and arranged on the circumferential side surface of the valve body.

[0091] In this way, the position of the electrical connection plug is designed more reasonably.

[0092] In this specific embodiment, the valve body includes a valve body main body 56, and a valve body rear cover 57 is provided at the outer end of the valve body main body; a rectangular block protruding outward is provided at a position on the housing opposite to the inner end of the valve body main body to form a valve body front cover 58; and each of the four corner positions of the valve body rear cover is provided with a first through hole, and a connecting screw is provided in each first through hole, and each connecting screw passes through a second through hole on the valve body main body and is threadedly connected to a connecting threaded hole provided on the valve body front cover; and sealing rings are respectively provided between the valve body main body and the valve body rear cover and between the valve body main body and the valve body front cover.

[0093] In this way, the structural design of the valve body is simpler and more reasonable, and it is more convenient for processing and manufacturing.

[0094] In this specific embodiment, the solenoid valve core rod includes a rear section 59 of the valve core rod and a front section 60 of the valve core rod, and the diameter of the rear section of the valve core rod is set to be smaller than the diameter of the front section of the valve core rod; the installation cavity includes a rear section of the installation cavity provided on the valve body main body and a front section of the installation cavity provided on the valve body front cover; and the diameter of the rear section of the installation cavity is set to be smaller than the diameter of the front section of the installation cavity; and the rear section and the front section of the valve core rod are respectively arranged and fitted in the rear section and the front section of the installation cavity; and a sealing ring installation groove is provided on the outer circumferential surface of the front section of the valve core rod and a sealing ring is installed.

[0095] In this way, the structural design of the solenoid valve core rod and the installation cavity is more reasonable, and it is more convenient to seal between the solenoid valve core rod and the installation cavity. And the rear section of the installation cavity is provided on the valve body main body, and the front section of the installation cavity is provided on the valve body front cover, which is more convenient for processing and manufacturing.

[0096] In this specific embodiment, the spring thrust structure includes a spiral spring 61 sleeved on the inner end of the valve rod; the spiral spring is integrally designed in a frustum shape, and one end of the spiral spring abuts against the inner side of the limit convex edge of the inner end of the valve rod, and the other end of the spiral spring abuts against and supports on the abutting step surface of the inner peripheral wall of the blind hole.

[0097] In this way, the spring thrust structure is simpler and more convenient for installation and layout.

[0098] In this specific embodiment, there are through grooves 62 arranged non-axially on the outer peripheral surface of the valve stem, and the two through grooves are symmetrically arranged.

[0099] In this way, with the through grooves provided, when the solenoid valve core rod is de-energized, the air inlet allows air to enter and pass through the through grooves and then into the communication hole. The structural design is simpler and more reasonable.

[0100] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention through logical analysis, reasoning, or limited experiments based on the concept of the present invention on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. Electric control clutch booster with shift control valve, comprising a booster body, the booster body includes a cylinder block at the front end, a piston is arranged in the cylinder block, and a push rod is connected to the piston; the piston divides the interior of the cylinder block into a front cavity on the front side of the piston and a rear cavity on the rear side of the piston; an air inlet channel is provided on the cylinder block and is communicated with the front cavity; an air inlet hole and an air return hole are also provided on the cylinder block and are respectively communicated with the rear cavity; it is characterized in that, The booster body also includes a shell at the rear end, the inner cavity of the shell is connected to the front air intake channel; a rear air intake channel and a rear air return channel are provided on the shell, and the front ends of the rear air intake channel and the rear air return channel are respectively connected to the air intake hole and the air return hole; and an air intake control solenoid valve and an air return control solenoid valve are respectively provided corresponding to the rear air intake channel and the rear air return channel; an air intake port, an air exhaust port, an air outlet port and a return air outlet port are provided on the shell; and the rear end of the rear return air channel is connected to the return air outlet; a two-position three-way valve is also provided on the shell, and the two control positions of the two-position three-way valve can respectively connect the air intake port and the rear air intake channel and connect the air intake port and the air outlet; An exhaust nozzle is also installed on the shell, and the air inlet and outlet ends of the exhaust nozzle are connected to the rear air return channel; An axially arranged and outwardly protruding front intake ridge is provided on the outer peripheral wall of the cylinder body; the front intake passage includes an axially arranged front intake hole provided on the front intake ridge, the front end of the front intake hole being connected to the front cavity; a radially arranged front intake connecting hole is provided on the rear end wall of the cylinder body, the outer end of the front intake connecting hole being connected to the front intake hole, and the inner end of the front intake connecting hole being connected to the interior of the shell; Three connecting holes are distributed in a triangular shape on the rear end face inside the cylinder body, and each connecting hole is provided with a connecting screw, and the threaded ends of the connecting screws each pass through the connecting holes and are respectively connected to the threaded holes provided on the inner side surface of the shell; and a sealing ring is provided on the inner side of the screw head of the connecting screw.

2. The electronically controlled clutch booster with a shift control valve according to claim 1, characterized in that: The piston includes a piston body at the front end and a piston rod connected to the rear end of the piston body; a coil spring is sleeved on the piston rod, and the two ends of the coil spring are respectively supported on the rear end of the piston body and the rear end inside the cylinder body; and the piston rod extends backward and passes through the through hole at the rear end of the cylinder body to the outside, and a rearward protruding placement protrusion is provided inside the shell, and the placement protrusion is provided with a placement hole designed as a blind hole structure, so that the piston rod passes through the through hole at the rear end of the cylinder body and extends into the placement hole; a sealing ring is provided between the placement hole and the rear end face of the cylinder body; an induction magnet is provided on the piston rod, and a Hall sensor is provided on the shell.

3. The electronically controlled clutch booster with a shift control valve according to claim 2, characterized in that: At the rear end of the cylinder body and corresponding to the position of the through hole, the inner and outer sides are respectively protruded inward and outward to form a mounting cylinder with a cylindrical structure as a whole. The sealing ring is arranged between the outer end surface of the mounting cylinder and the shell; and a mounting groove and a sealing ring are provided on the inner circumferential wall of the inner end of the mounting cylinder.

4. The electronically controlled clutch booster with a shift control valve according to claim 2, characterized in that: A mounting hole is provided on the outer end surface of the piston rod, and the induction magnet includes a first magnet, a permanent magnet and a second magnet that are inserted and installed in the mounting hole from the inside to the outside in sequence; a retaining ring with an overall annular structure is also provided at the outer end of the mounting hole, and the retaining ring is supported on the outer end of the second magnet to prevent the second magnet from escaping from the outer end of the mounting hole.

5. The electronically controlled clutch booster with a shift control valve according to claim 2, characterized in that: The piston body and the piston rod are integrally formed; a pad installation hole is provided in the middle of the front end surface of the piston body and a pad is installed correspondingly; a connecting ball head is provided at the end of the push rod, and the outer surface of the pad is a concave spherical surface and can abut and support the inner side of the connecting ball head; and a telescopic dust cover is provided on the outside of the push rod.

6. The electronically controlled clutch booster with a shift control valve according to claim 2, characterized in that: On the outer side surface of one end of the housing adjacent to the cylinder block, two connecting posts are provided, and the Hall sensor is fixedly connected to the two paired connecting posts by screws.

7. The electronically controlled clutch booster with a shift control valve according to claim 2, characterized in that: Annular mounting grooves are respectively provided on the outer circumferential surfaces at both ends of the piston body, and sealing rings are installed therein; an annular assembly groove is provided between the two mounting grooves on the piston body, and a Y-shaped sealing ring is provided in the assembly groove.

8. The electronically controlled clutch booster with a shift control valve according to claim 1, characterized in that: The cylinder block includes a cylinder block outer shell with an overall cylindrical structure design and an open front end. A cylinder block cover is fixedly connected to the open end of the cylinder block outer shell; and the open end of the cylinder block outer shell has a connecting disk formed by bending vertically outwards in a circle. The cylinder block cover is detachably connected and fixed to the connecting disk by fixing screws; mounting connection holes are also provided at four corner positions of the cylinder block cover, and the mounting connection holes penetrate through the connecting disk.

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