CN218287717U - Three-cavity pressurization structure for vehicle electronic hydraulic braking system - Google Patents
Three-cavity pressurization structure for vehicle electronic hydraulic braking system Download PDFInfo
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- CN218287717U CN218287717U CN202222349708.0U CN202222349708U CN218287717U CN 218287717 U CN218287717 U CN 218287717U CN 202222349708 U CN202222349708 U CN 202222349708U CN 218287717 U CN218287717 U CN 218287717U
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Abstract
The utility model discloses a three chamber pressure intensifying structures for vehicle electronic hydraulic braking system. The hydraulic cylinder comprises a hydraulic cylinder, a first piston and a second piston, wherein the first piston and the second piston are positioned in the hydraulic cylinder; a cylinder hole is formed in the hydraulic cylinder, a connecting flange is installed at the outer end of the cylinder hole, an inner cavity is formed in the connecting flange, and the inner cavity of the connecting flange is coaxially communicated with the cylinder hole of the hydraulic cylinder; a second piston and a first piston are sequentially arranged in the cylinder hole from inside to outside, and a first cavity is formed in the cylinder hole between the first piston and the second piston; the cylinder bore between the second piston and the inner bottom surface of the cylinder bore forms a second chamber; a part of the outer end of the first piston extends into an inner cavity of the connecting flange, and a third cavity is formed in the inner cavity of the connecting flange between the outer end of the first piston and the hydraulic cylinder; the first cavity, the second cavity and the third cavity are communicated. The utility model discloses can satisfy the effect that plays supplementary initial liquid measure in the too high stopper of the required liquid measure of braking system requirement a bit, can be more extensive be applicable to braking system under the effect that improves the biggest brake pressure.
Description
Technical Field
The utility model relates to a vehicle braking pressure boost structure especially relates to a three pressure boost chamber structure has for electronic hydraulic braking.
Background
The electronic hydraulic brake system used in the current market is mostly of two pressurizing cavity structures, and the phenomena of untimely and insufficient fluid infusion exist in part, so that sufficient brake fluid cannot be provided in time when the electronic system fails.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem existing in the background art, the utility model provides a three chamber pressure boost structures for vehicle electron hydraulic braking system.
The utility model adopts the technical proposal that:
the utility model comprises a hydraulic cylinder, a first piston and a second piston which are positioned in the hydraulic cylinder; a cylinder hole is formed in the hydraulic cylinder, a connecting flange is arranged at the outer end of the cylinder hole, an inner cavity is formed in the connecting flange, and the inner cavity of the connecting flange is coaxially communicated with the cylinder hole of the hydraulic cylinder; a second piston and a first piston are sequentially arranged in the cylinder hole from inside to outside, and a first cavity is formed in the cylinder hole between the first piston and the second piston; a cylinder bore between the second piston and an inner bottom surface of the cylinder bore forms a second chamber; a part of the outer end of the first piston extends into an inner cavity of the connecting flange, and a third cavity is formed in the inner cavity of the connecting flange between the outer end of the first piston and the hydraulic cylinder; the first cavity, the second cavity and the third cavity are communicated.
The second piston is connected with the inner bottom surface of the cylinder hole of the hydraulic cylinder through a second piston spring assembly,
the second piston is connected with the first piston through a first piston spring.
And the second piston is hermetically connected with the hole wall of the hydraulic cylinder hole through a second piston auxiliary leather cup and a second piston main leather cup.
And the inner end part of the first piston is hermetically connected with the cylinder hole of the hydraulic cylinder through a first piston auxiliary leather cup and a first piston main leather cup.
And the outer end part of the first piston is hermetically connected with a cylinder hole of the hydraulic cylinder through a wheel cylinder cup.
The hydraulic cylinder is externally provided with an oil can, and the oil can is communicated with the first cavity, the second cavity and the third cavity through a pipeline arranged inside the hydraulic cylinder.
The outer end of the first piston is connected with a push rod, the push rod is connected with a push rod fork, and the push rod fork is connected to a vehicle pedal.
And a flange oil way pipeline is arranged in the connecting flange, so that the third cavity is communicated with the pipeline in the hydraulic cylinder through the flange oil way pipeline and then is communicated with the oil can.
The utility model discloses exert force on the push rod, transmit to first piston, second piston, make the volume in three pressure boost chamber reduce, the brake fluid passes through the oil circuit and shifts. When the push rod retreats, the volumes of the three pressurizing cavities are increased, and the brake fluid returns to the pressurizing cavities.
The utility model has the advantages that:
the utility model relates to a three chamber pressure boost structure with can satisfy above-mentioned function, when conventional braking, the brake fluid in the third chamber can compensate first chamber and second chamber, also can provide more brake fluids when the electronic system became invalid.
The utility model discloses can satisfy the effect that plays supplementary initial liquid measure in the too high stopper of the required liquid measure of braking system requirement a bit, can be more extensive be applicable to braking system under the effect that improves the biggest brake pressure.
Drawings
Fig. 1 is an assembly view of relevant parts of an electric brake system having three booster chambers.
Fig. 2 is an oil path view of a three-chamber supercharging structure.
In the figure: 1. flange, 2, pneumatic cylinder, 3, second piston spring assembly, 4, second piston, 41, the vice leather cup of second piston, 42, the main leather cup of second piston, 5, first piston spring, 6, first piston, 61, wheel cylinder leather cup, 62, the vice leather cup of first piston, 63, the main leather cup of first piston, 7, push rod return spring, 8, fixed pin, 9, push rod, 10, push rod fork, 11, oilcan.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, the structure comprises a hydraulic cylinder 2 and a first piston 6 and a second piston 4 which are positioned in the hydraulic cylinder 2; a cylinder hole is formed in the hydraulic cylinder 2, a connecting flange 1 is installed at the outer end of the cylinder hole, the connecting flange 1 is fixed on the hydraulic cylinder 2, an inner cavity is formed in the connecting flange 1, and the inner cavity of the connecting flange 1 is coaxially communicated with the cylinder hole of the hydraulic cylinder 2; the second piston 4 and the first piston 6 are sequentially arranged in the cylinder hole from inside to outside, and a first cavity is formed between the first piston 6 and the second piston 4; the second piston 4 is positioned close to the inner bottom of the cylinder hole, and a second cavity is formed between the second piston 4 and the inner bottom surface of the cylinder hole; a part of the outer end of the first piston 6 extends into the inner cavity of the connecting flange 1, and a third cavity is formed in the inner cavity of the connecting flange 1 between the outer end of the first piston 6 and the hydraulic cylinder 2; the first cavity, the second cavity and the third cavity are communicated and all used as three pressurizing cavities.
The third chamber is in fact an annular chamber formed between the outside of the first piston 6 and the inside chamber of the connecting flange 1.
The utility model discloses an add the third chamber, formed three chamber pressure intensifying structures, can mend oil fast for original two chambeies, improve braking reaction rate.
The second piston 4 is connected with the inner bottom surface of the cylinder hole of the hydraulic cylinder 2 through the second piston spring assembly 3, and the second piston spring assembly 3 exists in the second cavity, so that the second piston 4 can return after moving.
The second piston 4 and the first piston 6 are connected by a first piston spring 5. A first piston spring 5 is arranged between the first cavity and the second cavity, so that the first piston 6 can return after moving.
The second piston 4 is hermetically connected with the hole wall of the cylinder hole of the hydraulic cylinder 2 through a second piston auxiliary leather cup 41 and a second piston main leather cup 42. Specifically, two annular grooves are formed in the hole wall of the cylinder hole of the hydraulic cylinder 2 in the middle of the second piston 4, a second piston auxiliary leather cup 41 and a second piston main leather cup 42 are respectively installed in the two annular grooves, and the outer peripheral surface of the second piston 4 and the wall surface of the cylinder hole of the hydraulic cylinder 2 are connected in a sealing mode through the second piston auxiliary leather cup 41 and the second piston main leather cup 42.
The inner end part of the first piston 6 is hermetically connected with the cylinder hole of the hydraulic cylinder 2 through a first piston auxiliary leather cup 62 and a first piston main leather cup 63. Specifically, two annular grooves are formed in the wall of the cylinder hole of the hydraulic cylinder 2 at the inner end of the first piston 6, a first piston auxiliary leather cup 62 and a first piston main leather cup 63 are respectively installed in the two annular grooves, and the outer peripheral surface of the inner end of the first piston 6 is hermetically connected with the wall surface of the cylinder hole of the hydraulic cylinder 2 through the first piston auxiliary leather cup 62 and the first piston main leather cup 63.
The outer end of the first piston 6 is hermetically connected with the cylinder hole of the hydraulic cylinder 2 through a wheel cylinder cup 61. Specifically, an annular groove is formed in the hole wall of the cylinder hole of the hydraulic cylinder 2 at the outer end of the first piston 6, wheel cylinder cups 61 are respectively installed in the annular grooves, and the outer peripheral surface of the outer end of the first piston 6 and the wall surface of the cylinder hole of the hydraulic cylinder 2 are connected in a sealing mode through the wheel cylinder cups 61.
An oil can 11 is arranged outside the hydraulic cylinder 2, and the oil can 11 is communicated with the first cavity, the second cavity and the third cavity through a pipeline arranged inside the hydraulic cylinder 2.
The outer end of the first piston 6 is connected with a push rod 9, the push rod 9 is further connected with a push rod fork 10, and the push rod fork 10 is connected with a vehicle pedal.
The first piston 6 is connected with the push rod 9 through a fixing pin 8:
the fixing pin 8 is in a straw hat shape, the straw hat-shaped brim of the fixing pin 8 is connected with the connecting flange 1 through the push rod return spring 7, the push rod return spring 7 is sleeved outside the fixing pin 8 and the connecting flange 1, and the straw hat-shaped end part of the fixing pin 8 extends into the connecting flange 1 and is connected to the first piston 6; a ball socket is arranged in the straw hat shape of the fixing pin 8, the end part of the push rod 9 is spherical, the end part of the push rod 9 is embedded into the ball socket of the fixing pin 8, the push rod 9 can freely swing in the ball socket of the fixing pin 8 after installation and connection, and meanwhile, the push rod return spring 7 is not influenced.
The push rod 9 is thus connected to the fixing pin 8, and the fixing pin 8 is connected to the first piston 6, thereby forming a power transmission mechanism.
A flange oil way pipeline is arranged in the connecting flange 1, so that the third cavity is communicated with the pipeline in the hydraulic cylinder 2 through the flange oil way pipeline and then is communicated with the oil can 11. The inside pipeline that exists of pneumatic cylinder 2 can be connected third chamber and first chamber, second chamber, oilcan 11.
The connecting flange 1 is provided with a sealing surface and a sealing structure, and forms a closed third cavity together with the hydraulic cylinder 2 and the first piston 6.
The first piston 6 has a sealing structure capable of sealing with the inner diameter of the connecting flange 1 and axially moving inside the connecting flange 1.
As shown in fig. 2, when the push rod 9 is pushed, the push rod 9 directly or indirectly transmits force to the first piston 6 and the second piston 4, so that the first piston 6 and the second piston 4 move forward, resulting in the volume reduction of the first chamber, the second chamber and the third chamber.
When the push rod 9 is pushed to advance after the pedal is stepped on, the first piston 6 moves towards the inner bottom of the cylinder hole of the hydraulic cylinder 2, the volume of the third cavity is driven to be reduced, the volume of the first cavity and the volume of the second cavity are also reduced, but the reduction amplitude of the volume of the third cavity is larger than the sum of the reduction amplitudes of the volumes of the first cavity and the second cavity (for example, the stroke of the third cavity is 40mm, the stroke of the first cavity is 20.3mm, and the stroke of the second cavity is 16.4mm; if the third cavity advances by 10mm, the springs of the first cavity and the second cavity can be compressed, the springs can advance by different strokes according to the change of the spring force, the stroke changes of the first cavity and the stroke of the second cavity are approximately same, but the total stroke of the first cavity and the second cavity is also 10mm. The liquid volume generated by the stroke of the third cavity is 22.22 and the cylinder diameters of the first cavity and the second cavity are 19.05, so that the reduction volume of the first cavity and the brake fluid volume of the second cavity enter the first cavity along the second cavity, and the brake fluid can be quickly supplied to the first cavity and the brake fluid.
When the push rod 9 returns after the pedal is released, the first piston 6 moves towards the bottom far away from the inner bottom of the cylinder hole of the hydraulic cylinder 2 to drive the volume of the third cavity to increase, and brake fluid in the oil can 11 enters the third cavity to enable the third cavity to be filled with the brake fluid again to wait for the next braking.
Claims (8)
1. A three chamber pressure intensifying structures for vehicle electro-hydraulic braking system which characterized in that: comprises a hydraulic cylinder (2), a first piston (6) and a second piston (4) which are positioned in the hydraulic cylinder (2); a cylinder hole is formed in the hydraulic cylinder (2), a connecting flange (1) is installed at the outer end of the cylinder hole, an inner cavity is formed in the connecting flange (1), and the inner cavity of the connecting flange (1) is coaxially communicated with the cylinder hole of the hydraulic cylinder (2); a second piston (4) and a first piston (6) are sequentially arranged in the cylinder hole from inside to outside, and a cylinder hole between the first piston (6) and the second piston (4) forms a first cavity; the second piston (4) and the cylinder hole between the inner bottom surfaces of the cylinder holes form a second chamber; a part of the outer end of the first piston (6) extends into the inner cavity of the connecting flange (1), and a third cavity is formed in the inner cavity of the connecting flange (1) between the outer end of the first piston (6) and the hydraulic cylinder (2); the first cavity, the second cavity and the third cavity are communicated.
2. The three-chamber supercharging structure for a vehicle electro-hydraulic brake system according to claim 1, characterized in that: the second piston (4) is connected with the inner bottom surface of the cylinder hole of the hydraulic cylinder (2) through a second piston spring assembly (3), and the second piston (4) is connected with the first piston (6) through a first piston spring (5).
3. The three-chamber supercharging structure for a vehicle electro-hydraulic brake system according to claim 1, characterized in that: and the second piston (4) is hermetically connected with the cylinder hole wall of the hydraulic cylinder (2) through a second piston auxiliary leather cup (41) and a second piston main leather cup (42).
4. The three-chamber supercharging structure for a vehicle electro-hydraulic brake system according to claim 1, characterized in that: the inner end part of the first piston (6) is hermetically connected with the cylinder hole of the hydraulic cylinder (2) through a first piston auxiliary leather cup (62) and a first piston main leather cup (63).
5. The three-chamber supercharging structure for a vehicle electro-hydraulic brake system according to claim 1, characterized in that: the outer end of the first piston (6) is hermetically connected with the cylinder hole of the hydraulic cylinder (2) through a wheel cylinder cup (61).
6. The three-chamber supercharging structure for a vehicle electro-hydraulic brake system according to claim 1, characterized in that: the hydraulic cylinder (2) is externally provided with an oil can (11), and the oil can (11) is communicated with the first cavity, the second cavity and the third cavity through a pipeline arranged inside the hydraulic cylinder (2).
7. The three-chamber supercharging structure for a vehicle electro-hydraulic brake system according to claim 1, characterized in that: the outer end of the first piston (6) is connected with a push rod (9), the push rod (9) is connected with a push rod fork (10), and the push rod fork (10) is connected to a vehicle pedal.
8. The three-chamber supercharging structure for a vehicle electro-hydraulic brake system according to claim 1, characterized in that: and a flange oil way pipeline is arranged in the connecting flange (1), so that the third cavity is communicated with the pipeline in the hydraulic cylinder (2) through the flange oil way pipeline and then is communicated with the oil can (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222349708.0U CN218287717U (en) | 2022-09-05 | 2022-09-05 | Three-cavity pressurization structure for vehicle electronic hydraulic braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222349708.0U CN218287717U (en) | 2022-09-05 | 2022-09-05 | Three-cavity pressurization structure for vehicle electronic hydraulic braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218287717U true CN218287717U (en) | 2023-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222349708.0U Active CN218287717U (en) | 2022-09-05 | 2022-09-05 | Three-cavity pressurization structure for vehicle electronic hydraulic braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218287717U (en) |
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2022
- 2022-09-05 CN CN202222349708.0U patent/CN218287717U/en active Active
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