Waterproof ventilation valve adaptive to drive-by-wire brake motor and simulation cylinder

Abstract

The utility model relates to the technical field of automobile drive-by-wire brake, in particular to a waterproof ventilation valve adaptive to a drive-by-wire brake motor and a simulation cylinder, which comprises a waterproof ventilation valve, a simulation cylinder cover, a valve block and a motor, the waterproof ventilation valve comprises a valve main body, a protective cover, a waterproof ventilation film and a rubber ring, a threaded pipe is arranged at the bottom end of the valve main body, and the waterproof ventilation film is arranged in the threaded pipe. The waterproof breathable valve is in threaded connection with the threaded hole through a threaded pipe, an airflow channel is formed in the threaded pipe in a penetrating mode, the threaded pipe at the bottom end of the valve body is connected with the threaded hole of the valve block through a conical thread, self-locking anti-loosening and rapid dismounting and mounting are achieved, and a waterproof breathable film is fixed to an annular boss on one side of a step face through laser welding. The protection cover is installed on the valve body through the through hole, the avoiding groove in the lower end of the protection cover enables the buckle to be retracted and then reset, a closed cavity is formed, large foreign matter is prevented from impacting and damaging the waterproof breathable film, and dirt is prevented from covering the waterproof breathable film.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile wire control brake, and specifically discloses a waterproof breather valve matched with wire control brake motor and simulation cylinder. BACKGROUND

[0002] With the gradual development of electric, intelligent and wire control of automobile, the electro-hydraulic wire control brake system and the motor mechanical wire control brake system are more and more concerned, at the same time, the brake system is required to have high precision, high safety and high reliability, and the most critical is the waterproof protection of the motor and the simulation cylinder, and the dynamic balance with the external atmospheric pressure when the two reciprocate, and a breather structure is configured accordingly.

[0003] The existing vehicle wire control electro-hydraulic composite brake generally adopts a structure of filter screen riveting and pressure forming once, and once the filter screen is damaged or blocked by dirt, the filter screen cannot be replaced, resulting in breather failure, and the reliability is difficult to meet the industrial demand. According to the statistics of SAE International, the failure rate of the existing filter screen type breather structure is 12.7% within 5 years of use cycle, and 83% of the failures are caused by dirt accumulation due to the non-replaceable design, and the industry urgently needs a new type of maintainable breather valve structure. UTILITY MODEL CONTENTS

[0004] The utility model discloses a waterproof breather valve matched with wire control brake motor and simulation cylinder, which is suitable for locking, preventing loosening and disassembling quickly, and the protective cover is installed to the valve main body through the through hole, the accommodation slot at the lower end of the protective cover makes the buckle shrink and reset, forming a closed cavity, blocking the impact of large foreign matters on the waterproof breather membrane and preventing dirt from blocking the waterproof breather membrane.

[0005] The utility model discloses a waterproof breather valve matched with wire control brake motor and simulation cylinder, which comprises a waterproof breather valve, a simulation cylinder cover, a valve block and a motor, the left side, the front end and the top end of the valve block are respectively provided with a simulation cylinder cavity gas path, a threaded hole and a motor inner cavity gas path, the simulation cylinder cover, the waterproof breather valve and the motor are connected with the valve block through the simulation cylinder cavity gas path, the threaded hole and the motor inner cavity gas path respectively.

[0006] The waterproof breather valve comprises a valve main body, a protective cover, a waterproof breather membrane and a rubber ring, the bottom end of the valve main body is provided with a threaded pipe, the waterproof breather valve is connected with the threaded hole through the threaded pipe, an airflow channel is formed in the threaded pipe, the airflow channel is aligned and communicated with the gas path on the inner side of the threaded hole, the middle region of the gas path of the valve block extends inward and is cross-connected with the simulation cylinder cavity gas path, and the end region of the gas path of the valve block extends inward and is cross-connected with the motor inner cavity gas path.

[0007] As a preferred waterproof breather valve matched with wire control brake motor and simulation cylinder of the utility model, the airflow channel extends upward to the inside of the valve main body and forms a stepped surface, one side of the stepped surface is provided with a circular ring boss, and the waterproof breather membrane is welded on the upper end face of the circular ring boss.

[0008] As a kind of waterproof breather valve of the utility model for adaptive line control brake motor and simulation cylinder, the waterproof breather membrane adopts ePTFE material, and the air permeation rate is ≥5L / (min·cm 2 )@1kPa, the temperature resistance range is-40℃ to 150℃, the porosity is 35±5%, and the burst pressure is ≥2.5Bar.

[0009] As a kind of waterproof breather valve of the utility model for adaptive line control brake motor and simulation cylinder, the upper end of the valve body is provided with a through hole, the protective cover is detachably connected to the inner side of the through hole, 6-12 evenly distributed accommodation grooves are formed in the outer wall of the lower end of the protective cover, and the groove width of the accommodation grooves is 1±0.1mm.

[0010] As a kind of waterproof breather valve of the utility model for adaptive line control brake motor and simulation cylinder, the rubber ring is sleeved on the outer wall of the threaded pipe.

[0011] As a kind of waterproof breather valve of the utility model for adaptive line control brake motor and simulation cylinder, the thread of the threaded pipe is R1 / 8 specification, and the thread rise angle is 3°30'.

[0012] The utility model has the advantages of:

[0013] The threaded pipe at the bottom end of the valve body is connected with the threaded hole of the valve block through R1 / 8 taper thread, realizes self-locking anti-loosening and quick disassembly and assembly, solves the industry pain point that the waterproof breather structure of motor and simulation cylinder in line control brake field cannot be maintained, improves the safety and reliability of brake system, the airflow channel in the threaded pipe is communicated with the air path of the valve block, the middle region is cross-connected with the air path of simulation cylinder cavity, and the tail end is communicated with the air path of motor inner cavity, so that the dynamic balance of internal and external air pressure during braking is ensured.

[0014] The airflow channel of the valve body extends upward to the step surface, the circular ring boss on one side of the step surface is fixed with waterproof breather membrane through laser welding, forms IP67 level waterproof barrier, resists one-meter water immersion, the protective cover is installed to the valve body through the through hole, the accommodation grooves at the lower end of the protective cover make the buckle shrink and reset, form airtight cavity, block large foreign matter from impacting and damaging waterproof breather membrane and prevent dirt from covering waterproof breather membrane, solve the industry pain point of unexpected failure and low reliability of electro-hydraulic line control brake pedal signal, and improve the safety and reliability of line control brake system.

[0015] The threaded pipe is sleeved with rubber ring, is compressed and sealed when connected with the valve block thread, prevents water vapor from penetrating, and the gap between the protective cover and the valve body is combined with IP69K protection, which can withstand 80℃ high-pressure water column multi-angle washing. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings used in the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, the elements or parts are not necessarily drawn according to the actual proportions.

[0017] Figure 1 It is the overall front view structure of the present application.

[0018] Figure 2 It is the overall three-dimensional structure of the present application.

[0019] Figure 3 It is the three-dimensional structure of the waterproof and breathable valve of the present application.

[0020] Figure 4 It is the three-dimensional structure of the waterproof and breathable valve of the present application.

[0021] Figure 5 It is the sectional three-dimensional structure of the waterproof and breathable valve of the present application.

[0022] In the drawings, 1, waterproof and breathable valve; 2, simulation cylinder cover; 3, valve block; 4, motor; 5, threaded hole; 6, valve body; 7, threaded tube; 8, airflow channel; 9, protective cover; 10, waterproof and breathable film; 11, rubber ring; 12, circular ring boss; 13, through hole; 14, accommodation groove. DETAILED DESCRIPTION

[0023] The present application will be further described below in conjunction with the drawings and specific embodiments, in order to help understand the content of the present application. The methods used in the present application are conventional methods unless otherwise specified; the raw materials and devices used are conventional commercially available products unless otherwise specified.

[0024] Please refer to Figures 1-5 A waterproof and breathable valve suitable for adapting line control brake motor and simulation cylinder, including waterproof and breathable valve 1, simulation cylinder cover 2, valve block 3 and motor 4, the left side, front end and top end of valve block 3 are respectively provided with simulation cylinder cavity gas path, threaded hole 5 and motor inner cavity gas path, simulation cylinder cover 2, waterproof and breathable valve 1 and motor 4 are connected with valve block 3 through simulation cylinder cavity gas path, threaded hole 5 and motor inner cavity gas path respectively.

[0025] The waterproof and breathable valve 1 comprises a valve body 6, a protective cover 9, a waterproof and breathable film 10 and a rubber ring 11, the bottom end of the valve body 6 is provided with a threaded pipe 7, the waterproof and breathable valve 1 is threadedly connected with the threaded hole 5 through the threaded pipe 7, the inside of the threaded pipe 7 is provided with an airflow channel 8, the airflow channel 8 is in alignment and communication with the air path inside the threaded hole 5, the air path of the valve block 3 extends inwardly to the middle region and the air path of the simulation cylinder cavity is cross-connected, and the air path of the valve block 3 extends inwardly to the terminal region and the air path of the motor inner cavity is cross-connected.

[0026] In the embodiment: the threaded pipe 7 at the bottom end of the valve body 6 is connected with the threaded hole 5 of the valve block 3 through R1 / 8 taper thread, self-locking anti-loosening and quick disassembly are realized, the industry pain point that the waterproof and breathable structure of the motor and the simulation cylinder in the field of wire control braking cannot be maintained is solved, the safety and reliability of the braking system are improved, the airflow channel 8 inside the threaded pipe 7 is in communication with the air path of the valve block 3, the middle region is cross-connected with the air path of the simulation cylinder cavity, and the terminal is connected with the air path of the motor 4 inner cavity, so that the dynamic balance of the internal and external air pressure during braking is ensured.

[0027] The airflow channel 8 of the valve body 6 extends upwardly to a stepped surface, the circular ring boss 12 on one side of the stepped surface is fixed with the waterproof and breathable film 10 through laser welding, an IP67 level waterproof barrier is formed, one-meter water immersion is resisted, the protective cover 9 is installed to the valve body 6 through the through hole 13, the gap 14 at the lower end of the protective cover 9 makes the buckle shrink and reset, a sealed cavity is formed, large foreign matters are blocked from impacting and damaging the waterproof and breathable film 10 and preventing dirt from covering the waterproof and breathable film 10.

[0028] The outer wall of the threaded pipe 7 is sleeved with the rubber ring 11, and the rubber ring 11 is compressed and sealed when the threaded pipe 7 is threadedly connected with the valve block 3, so that water vapor is prevented from penetrating, and the gap between the protective cover 9 and the valve body 6 is combined with IP69K protection, and can withstand 80 DEG C high-pressure water column multi-angle washing.

[0029] As a technical optimization scheme of the utility model, the airflow channel 8 extends upwardly to the inside of the valve body 6 and forms a stepped surface, a circular ring boss 12 is arranged on one side of the stepped surface, and the waterproof and breathable film 10 is welded on the upper end surface of the circular ring boss 12.

[0030] In the embodiment: the waterproof and breathable film 10 is welded on the upper end surface of the circular ring boss 12, the waterproof and breathable film 10 is fixed firmly, the sealing property is improved, and IP67 immersion protection is met.

[0031] As a technical optimization scheme of the utility model, the waterproof and breathable film 10 is made of ePTFE material, the air permeation rate is greater than or equal to 5L / (min·cm 2 )@1kPa, the temperature resistance range is -40 DEG C to 150 DEG C, the porosity is 35±5%, and the burst pressure is greater than or equal to 2.5Bar.

[0032] In the embodiment, the waterproof and breathable membrane 10 adopts ePTFE material, the air permeation rate is greater than or equal to 5 L / (min*cm 2 )@1kPa, the temperature resistance range is -40 DEG C to 150 DEG C, the porosity is 35+ / -5%, the burst pressure is greater than or equal to 2.5 Bar, and the waterproof and breathable membrane 10 is suitable for extreme working conditions.

[0033] As a technical optimization scheme of the utility model, the upper end of the valve body 6 is provided with a through hole 13, the protective cover 9 is detachably connected to the inner side of the through hole 13, and the lower end outer wall of the protective cover 9 is provided with 6-12 evenly distributed accommodation grooves 14, and the groove width of the accommodation groove 14 is 1+ / -0.1 mm.

[0034] In the embodiment, the protective cover 9 is elastically clamped to the through hole 13 through the accommodation groove 14, fast disassembly and assembly maintenance are facilitated, the protective cover 9 is closely matched with the valve body 6, and foreign matter invasion is blocked.

[0035] As a technical optimization scheme of the utility model, the rubber ring 11 is sleeved on the outer wall of the threaded pipe 7.

[0036] In the embodiment, the rubber ring 11 is sleeved on the outer wall of the threaded pipe 7, the sealing property of the threaded connection is enhanced, and water vapor penetration is prevented.

[0037] As a technical optimization scheme of the utility model, the thread of the threaded pipe 7 is R1 / 8 specification, and the thread rise angle is 3°30'.

[0038] In the embodiment, the thread of the threaded pipe 7 is R1 / 8 specification, the thread rise angle is 3°30', self-locking and anti-loosening are achieved, greater than or equal to 50 N*m torque can be borne, and long-term stability is ensured.

[0039] The working principle and use process of the utility model are as follows: when the brake system works, the reciprocating motion of the motor 4 and the simulation cylinder causes the change of the inner cavity air pressure, the airflow enters the waterproof and breathable valve 1 through the air path and the airflow passage 8 of the valve block 3, the waterproof and breathable membrane 10 utilizes the micropore characteristics of the ePTFE material, balances the internal and external air pressure difference, simultaneously blocks the external water vapor, the threaded pipe 7 at the bottom end of the valve body 6 is connected with the threaded hole 5 of the valve block 3 through R1 / 8 tapered thread, self-locking and anti-loosening and fast disassembly and assembly are achieved, the airflow passage 8 of the valve body 6 extends upward to the stepped surface, the circular ring boss 12 on one side of the stepped surface is fixed with the waterproof and breathable membrane 10 through laser welding, an IP67 level waterproof barrier is formed, 1 meter water depth immersion is resisted, the protective cover 9 is installed to the valve body 6 through the through hole 13, the accommodation groove 14 at the lower end of the protective cover 9 makes the buckle shrink and reset, a closed cavity is formed, large foreign matter impact damage to the waterproof and breathable membrane 10 is blocked, and dirt obscuring the waterproof and breathable membrane 10 is prevented.

[0040] In the description of the utility model, need understanding is, the term "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "intermediate" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and is not indicating or implying that the indicated device or element must have a specific orientation, a specific orientation structure and operation, therefore it cannot be understood as a limitation on the utility model.

[0041] The above-mentioned is only a specific embodiment of the utility model, and cannot limit the range of the utility model, so the replacement of equivalent components or equivalent changes and modifications made in the protection range of the utility model patent should still belong to the scope covered by the claims of the utility model.

Claims

1. A waterproof and breathable valve adapted to a drive-by-wire motor and a simulated cylinder, comprising a waterproof and breathable valve (1), a simulated cylinder head (2), a valve block (3), and a motor (4), characterized in that: The valve block (3) has a simulated cylinder cavity air passage, a threaded hole (5) and a motor cavity air passage on its left side, front end and top end respectively. The simulated cylinder head (2), waterproof vent valve (1) and motor (4) are connected to the valve block (3) through the simulated cylinder cavity air passage, the threaded hole (5) and the motor cavity air passage respectively. The waterproof and breathable valve (1) includes a valve body (6), a protective cover (9), a waterproof and breathable membrane (10), and a rubber ring (11). The bottom end of the valve body (6) is provided with a threaded tube (7). The waterproof and breathable valve (1) is threadedly connected to the threaded hole (5) through the threaded tube (7). An airflow channel (8) is opened through the inside of the threaded tube (7). The airflow channel (8) is aligned and connected with the air passage inside the threaded hole (5). The middle area of ​​the air passage of the valve block (3) extends inward and is connected to the air passage of the simulated cylinder cavity. The end area of ​​the air passage of the valve block (3) extends inward and is connected to the air passage of the motor cavity.

2. The waterproof and breathable valve for adapting a drive-by-wire motor and a simulated cylinder according to claim 1, characterized in that: The airflow channel (8) extends upward into the valve body (6) and forms a stepped surface. A circular boss (12) is provided on one side of the stepped surface. The waterproof and breathable membrane (10) is welded to the upper end face of the circular boss (12).

3. The waterproof and breathable valve for adapting a drive-by-wire motor and a simulated cylinder according to claim 1, characterized in that: The waterproof and breathable membrane (10) is made of ePTFE material with a breathability rate ≥5L / (min·cm). 2 @1kPa, temperature range is -40℃ to 150℃, porosity is 35±5%, burst pressure is ≥2.5Bar.

4. The waterproof and breathable valve for adapting a drive-by-wire motor and a simulated cylinder according to claim 1, characterized in that: The upper end of the valve body (6) is provided with a through hole (13), and the protective cover (9) is detachably connected to the inside of the through hole (13). The lower outer wall of the protective cover (9) is provided with 6-12 evenly distributed relief grooves (14), and the groove width of the relief grooves (14) is 1±0.1mm.

5. A waterproof and breathable valve for adapting a drive-by-wire motor and a simulated cylinder according to claim 1, characterized in that: The rubber ring (11) is fitted onto the outer wall of the threaded pipe (7).

6. A waterproof and breathable valve for adapting a drive-by-wire motor and a simulated cylinder according to claim 1, characterized in that: The thread of the threaded pipe (7) is R1 / 8 specification, and the thread helix angle is 3°30′.

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