CN219096695U - ABS hydraulic braking system of tractor - Google Patents
ABS hydraulic braking system of tractor Download PDFInfo
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- CN219096695U CN219096695U CN202320044685.4U CN202320044685U CN219096695U CN 219096695 U CN219096695 U CN 219096695U CN 202320044685 U CN202320044685 U CN 202320044685U CN 219096695 U CN219096695 U CN 219096695U
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Abstract
The utility model discloses an ABS hydraulic braking system of a tractor, which comprises a hydraulic oil tank, a foot braking valve, a three-position three-way electromagnetic valve, a wheel braking cylinder, an ABS controller, a two-position two-way electromagnetic valve I and a two-position two-way electromagnetic valve II, wherein a wheel rotating speed sensor is arranged on the wheel braking cylinder. The ABS controller is electrically connected with a wheel rotating speed sensor, a two-position two-way electromagnetic valve I and a two-position two-way electromagnetic valve II; the foot brake valve is respectively connected with a three-position three-way electromagnetic valve and a two-position two-way electromagnetic valve through a first hydraulic pipeline, the wheel side brake cylinder is connected with the three-position three-way electromagnetic valve through a second hydraulic pipeline, the two-position two-way electromagnetic valve I and the two-position two-way electromagnetic valve II are connected through a third hydraulic pipeline, and the two-position two-way electromagnetic valve I and the three-position three-way electromagnetic valve I are both connected with a hydraulic oil tank; one end of the three-position three-way electromagnetic valve is communicated with the second hydraulic pipeline through the first pilot oil way, and the other end of the three-position three-way electromagnetic valve is communicated with the third hydraulic pipeline through the second pilot oil way. The utility model can effectively solve the problem of wheel locking during sudden braking of the tractor on the premise of ensuring the braking effect.
Description
Technical Field
The utility model relates to the technical field of tractor brake control, in particular to an ABS hydraulic brake system of a tractor.
Background
In the prior art, when a tractor is in emergency braking, wheels are locked along with the increase of braking force, the vehicle is not controlled due to steering failure after the wheels are locked, and safety accidents such as steering wheel out of control, vehicle deviation, sideslip, tail flick and the like can be generated due to forward movement of the center of gravity of the vehicle after braking. The utility model provides an ABS hydraulic braking system for a tractor, which aims to eliminate potential safety hazards existing in the emergency braking of the tractor.
Disclosure of Invention
The utility model aims to provide an ABS hydraulic braking system capable of preventing safety accidents of a tractor during emergency braking.
In order to achieve the aim, the utility model discloses an ABS hydraulic braking system of a tractor, which comprises a hydraulic oil tank, a foot braking valve, a three-position three-way electromagnetic valve, a wheel braking cylinder, an ABS controller, a two-position two-way electromagnetic valve I and a two-position two-way electromagnetic valve II, wherein a wheel rotating speed sensor is arranged on the wheel braking cylinder. The ABS controller is electrically connected with a wheel rotation speed sensor, a two-position two-way electromagnetic valve I and a two-position two-way electromagnetic valve II respectively; the foot brake valve is respectively connected with a three-position three-way electromagnetic valve and a two-position two-way electromagnetic valve II through a first hydraulic pipeline, the wheel side brake cylinder is connected with the three-position three-way electromagnetic valve through a second hydraulic pipeline, the two-position two-way electromagnetic valve I and the two-position two-way electromagnetic valve II are connected through a third hydraulic pipeline, and the two-position two-way electromagnetic valve I and the three-position three-way electromagnetic valve I are both connected with a hydraulic oil tank; one end of the three-position three-way electromagnetic valve is communicated with the second hydraulic pipeline through the first pilot oil way, and the other end of the three-position three-way electromagnetic valve is communicated with the third hydraulic pipeline through the second pilot oil way. The ABS controller can control the wheel side brake cylinder to be communicated with the hydraulic oil tank or the first hydraulic pipeline by controlling the on-off of the two-position two-way electromagnetic valve I and the two-position two-way electromagnetic valve II, so that whether the wheel side brake cylinder brakes or not is realized, the problem of wheel locking during sudden braking of the tractor can be solved, and the circuit structural design is simple and reasonable.
Preferably, when the first two-position two-way electromagnetic valve is disconnected, the second two-position two-way electromagnetic valve is connected, and the second hydraulic pipeline is communicated with the first hydraulic pipeline through the three-position three-way electromagnetic valve; when the first two-position two-way electromagnetic valve is connected, the second two-position two-way electromagnetic valve is disconnected, and the second hydraulic pipeline is communicated with the hydraulic oil tank through the three-position three-way electromagnetic valve. The ABS controller controls the two-position two-way electromagnetic valve I and the two-position two-way electromagnetic valve II to be simultaneously powered on and powered off, so that the three-position three-way electromagnetic valve is controlled to quickly change direction, and the wheel side brake cylinder generates regular pulse brake pressure, thereby not only avoiding wheel locking, but also keeping the optimal brake effect.
Preferably, the foot brake valve is connected with a hydraulic oil tank through a fourth hydraulic pipeline, and a hydraulic pump is arranged on the fourth hydraulic pipeline.
Preferably, the first hydraulic line communicates with the fourth hydraulic line through the service brake valve when the service brake valve is depressed.
Preferably, the fourth hydraulic pipeline is provided with a one-way valve positioned between the hydraulic pump and the foot brake valve, and an accumulator is connected to the fourth hydraulic pipeline positioned between the one-way valve and the foot brake valve. The energy accumulator is used for storing hydraulic oil and keeping pressure stable; the check valve can prevent hydraulic oil in the accumulator from flowing into the hydraulic pump when the hydraulic pump is not operating.
Preferably, a pressure limiting valve connected with a hydraulic oil tank is connected on the fourth hydraulic pipeline between the check valve and the hydraulic pump and used for limiting the pressure of the system and protecting components in the system.
Preferably, the foot brake valve is provided with a left wheel and a right wheel which are respectively arranged corresponding to the two wheels positioned on the left side and the two wheels positioned on the right side of the tractor, namely the foot brake valve on the left side is arranged corresponding to the two wheels on the left side, and the foot brake valve on the right side is arranged corresponding to the two wheels on the right side.
Preferably, the three-position three-way electromagnetic valve, the two-position two-way electromagnetic valve I and the two-position two-way electromagnetic valve II are respectively provided with four wheels which are respectively arranged in one-to-one correspondence with the four wheels of the tractor.
Preferably, an oil absorption filter is arranged on a fourth hydraulic pipeline between the hydraulic pump and the hydraulic oil tank and is used for filtering impurities in hydraulic oil and guaranteeing the cleanliness of the hydraulic oil in the system.
In summary, the beneficial effects of the utility model are as follows: the ABS controller can control the wheel side brake cylinder to be communicated with the hydraulic oil tank or the first hydraulic pipeline by controlling the on-off of the two-position two-way electromagnetic valve I and the two-position two-way electromagnetic valve II, so that whether the wheel side brake cylinder brakes or not is realized, the problem of wheel locking during sudden braking of the tractor can be solved, and the circuit structural design is simple and reasonable. The utility model can effectively solve the problem of wheel locking during sudden braking of the tractor on the premise of ensuring the braking effect.
Drawings
FIG. 1 is a schematic diagram of a two-position two-way solenoid valve I and a two-position two-way solenoid valve II of a tractor ABS hydraulic brake system of the utility model when power is lost at the same time;
FIG. 2 is a schematic diagram of a two-position two-way solenoid valve I and two-position two-way solenoid valve II of a tractor ABS hydraulic brake system of the present utility model when both are simultaneously powered;
in the figure: 1. the hydraulic oil tank, 2, an oil absorption filter, 3, a hydraulic pump, 4, a pressure limiting valve, 5, a one-way valve, 6, an energy accumulator, 7, a foot brake valve, 8, a three-position three-way electromagnetic valve, 9, a wheel brake cylinder, 10, a wheel rotation speed sensor, 11, an ABS controller, 12, a two-position two-way electromagnetic valve I, 13, a two-position two-way electromagnetic valve II, 14, a first hydraulic pipeline, 15, a second hydraulic pipeline, 16, a third hydraulic pipeline, 17, a fourth hydraulic pipeline, 18, a first pilot oil way, 19 and a second pilot oil way.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
The terms "first," "second," "third," "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
The following is a description of preferred embodiments of the utility model, taken in conjunction with the accompanying drawings.
As shown in fig. 1 and fig. 2 (arrows in the drawings point to the flow direction of hydraulic oil), the utility model discloses an ABS hydraulic braking system of a tractor, which comprises a hydraulic oil tank 1, a foot braking valve 7, a three-position three-way electromagnetic valve 8, a wheel side braking cylinder 9 and an ABS controller 11 (the ABS controller in the utility model can be an ABS controller commonly used on an automobile or a train, the specific model of the ABS controller is not particularly limited herein, the ABS controller can realize the functions of the ABS controller in the utility model), a two-position two-way electromagnetic valve 12, a two-position two-way electromagnetic valve 13 and a wheel rotation speed sensor 10 is arranged on the wheel side braking cylinder 9. The ABS controller 11 is electrically connected to the wheel speed sensor 10, the two-position two-way solenoid valve one 12 and the two-position two-way solenoid valve two 13, respectively.
The foot brake valve 7 is respectively connected with a three-position three-way electromagnetic valve 8 and a two-position two-way electromagnetic valve 13 through a first hydraulic pipeline 14, the wheel brake cylinder 9 is connected with the three-position three-way electromagnetic valve 8 through a second hydraulic pipeline 15, the two-position two-way electromagnetic valve 12 and the two-position two-way electromagnetic valve 13 are connected through a third hydraulic pipeline 16, and the two-position two-way electromagnetic valve 12 and the three-position three-way electromagnetic valve 8 are both connected with the hydraulic oil tank 1; one end of the three-position three-way electromagnetic valve 8 is communicated with the second hydraulic pipeline 15 through the first pilot oil way 18, and the other end is communicated with the third hydraulic pipeline 16 through the second pilot oil way 19. Namely: the wheel brake cylinder 9 and the second hydraulic line 15 can be connected to the first hydraulic line 14 or the hydraulic tank 1 via a three-position three-way solenoid valve 8.
When the two-position two-way electromagnetic valve I12 and the two-position two-way electromagnetic valve II 13 are simultaneously powered off, the two-position two-way electromagnetic valve I12 is disconnected, and the two-position two-way electromagnetic valve II 13 is connected. Namely, the first hydraulic line 14 and the third hydraulic line 16 are communicated through the two-position two-way solenoid valve two 13, and the third hydraulic line 16 is not communicated with the hydraulic tank 1. At this time, the second hydraulic line 15 communicates with the first hydraulic line 14 through the three-position three-way electromagnetic valve 8.
When the two-position two-way electromagnetic valve I12 and the two-position two-way electromagnetic valve II 13 are simultaneously electrified, the two-position two-way electromagnetic valve I12 is connected, and the two-position two-way electromagnetic valve II 13 is disconnected. I.e. the first hydraulic line 14 and the third hydraulic line 16 are not in communication, and the third hydraulic line 16 is in communication with the hydraulic tank 1 via the two-position two-way solenoid valve one 12. At this time, the second hydraulic line 15 communicates with the hydraulic tank 1 through the three-position three-way electromagnetic valve 8.
The foot brake valve 7 is connected with the hydraulic oil tank 1 through a fourth hydraulic pipeline 17, the hydraulic pump 3 is arranged on the fourth hydraulic pipeline 17, and the oil suction filter 2 is arranged on the fourth hydraulic pipeline 17 between the hydraulic pump 3 and the hydraulic oil tank 1. When the foot brake valve 7 is depressed, the first hydraulic line 14 and the fourth hydraulic line 17 communicate through the foot brake valve 7. The fourth hydraulic pipeline 17 is provided with a one-way valve 5 positioned between the hydraulic pump 3 and the foot brake valve 7, and the fourth hydraulic pipeline 17 positioned between the one-way valve 5 and the foot brake valve 7 is connected with an accumulator 6. A pressure limiting valve 4 connected with the hydraulic oil tank 1 is connected to a fourth hydraulic pipeline 17 between the check valve 5 and the hydraulic pump 3.
The foot brake valve 7 is provided with a left foot brake valve and a right foot brake valve, which are respectively arranged corresponding to two wheels positioned on the left side and two wheels positioned on the right side of the tractor, namely the foot brake valve 7 on the left side is arranged corresponding to the two wheels on the left side, and the foot brake valve 7 on the right side is arranged corresponding to the two wheels on the right side. The three-position three-way electromagnetic valve 8, the two-position two-way electromagnetic valve I12 and the two-position two-way electromagnetic valve II 13 are respectively provided with four wheels which are respectively arranged in one-to-one correspondence with the four wheels of the tractor.
After the foot brake valve 7 is stepped on for braking, the ABS controller 11 collects wheel rotation speed signals through the wheel rotation speed sensor 10 and compares the wheel rotation speed signals with the actual vehicle speed to calculate the slip rate of the whole vehicle, the set threshold value of the slip rate is compared with the actual slip rate of the whole vehicle, the ABS controller 11 determines whether intervention is carried out according to the comparison result, and if the intervention is not carried out, normal braking is carried out.
As shown in fig. 1, during normal braking (the ABS controller 11 does not intervene), the ABS controller 11 keeps the two-position two-way solenoid valve one 12 and the two-position two-way solenoid valve two 13 in the original state from being electrified, and the two-position two-way solenoid valve one 12 is turned off and the two-position two-way solenoid valve two 13 is turned on. At this time, the first hydraulic line 14 and the third hydraulic line 16 are communicated through the two-position two-way solenoid valve two 13, and the third hydraulic line 16 is not communicated with the hydraulic tank 1. Since the three-position three-way electromagnetic valve 8 increases with the brake pressure, the pilot pressures of the first pilot oil path 18 and the second pilot oil path 19 are increased simultaneously to limit the three-position three-way electromagnetic valve 8 to the original position, namely the second hydraulic pipeline 15 is communicated with the first hydraulic pipeline 14 through the three-position three-way electromagnetic valve 8, and at the moment, hydraulic oil enters the wheel brake cylinder 9 through the three-position three-way electromagnetic valve 8 to realize normal braking.
When the ABS controller 11 is interposed, the ABS controller 11 rapidly controls the two-position two-way solenoid valve one 12 and the two-position two-way solenoid valve two 13 to alternately get and lose power at the same time before the wheels are locked. As shown in fig. 2, the first hydraulic line 14 and the third hydraulic line 16 are not connected when power is supplied, and the third hydraulic line 16 is connected to the hydraulic tank 1 through the two-position two-way solenoid valve one 12. At this time, the second pilot oil path 19 is communicated with the hydraulic oil tank 1 through the two-position two-way electromagnetic valve I12 for pressure relief, and the pressure of the first pilot oil path 18 still exists, so that the three-position three-way electromagnetic valve 8 realizes reversing under the action of the pressure of the first pilot oil path 18, and the second hydraulic pipeline 15 is communicated with the hydraulic oil tank 1 through the three-position three-way electromagnetic valve 8, so that the wheel brake cylinder 9 loses the braking effect. As shown in fig. 1, when power is lost, hydraulic oil enters the wheel brake cylinder 9 through the three-position three-way electromagnetic valve 8 to realize normal braking as described above.
The ABS controller 11 controls the two-position two-way electromagnetic valve I12 and the two-position two-way electromagnetic valve II 13 to be powered on and powered off simultaneously, and controls the three-position three-way electromagnetic valve 8 to quickly change direction, so that the wheel edge brake cylinder 9 is alternately connected to the hydraulic oil tank 1 and the fourth hydraulic pipeline 17, regular pulse brake pressure is generated, the brake pressure is properly regulated, and the wheel locking can be avoided, and the optimal brake effect can be maintained. Therefore, the problem of wheel locking during sudden braking of the tractor can be effectively solved on the premise of ensuring the braking effect.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (9)
1. The ABS hydraulic braking system of the tractor is characterized by comprising a hydraulic oil tank (1), a foot braking valve (7), a three-position three-way electromagnetic valve (8), a wheel edge braking cylinder (9), an ABS controller (11), a two-position two-way electromagnetic valve I (12) and a two-position two-way electromagnetic valve II (13), wherein a wheel rotating speed sensor (10) is arranged on the wheel edge braking cylinder (9), and the ABS controller (11) is respectively and electrically connected with the wheel rotating speed sensor (10), the two-position two-way electromagnetic valve I (12) and the two-position two-way electromagnetic valve II (13);
the foot brake valve (7) is respectively connected with a three-position three-way electromagnetic valve (8) and a two-position two-way electromagnetic valve (13) through a first hydraulic pipeline (14), the wheel brake cylinder (9) is connected with the three-position three-way electromagnetic valve (8) through a second hydraulic pipeline (15), the two-position two-way electromagnetic valve I (12) and the two-position two-way electromagnetic valve II (13) are connected through a third hydraulic pipeline (16), and the two-position two-way electromagnetic valve I (12) and the three-position three-way electromagnetic valve (8) are both connected with the hydraulic oil tank (1);
one end of the three-position three-way electromagnetic valve (8) is communicated with the second hydraulic pipeline (15) through the first pilot oil way (18), and the other end of the three-position three-way electromagnetic valve is communicated with the third hydraulic pipeline (16) through the second pilot oil way (19).
2. The ABS hydraulic braking system of the tractor according to claim 1 wherein,
when the two-position two-way electromagnetic valve I (12) is disconnected, the two-position two-way electromagnetic valve II (13) is connected, and the second hydraulic pipeline (15) is communicated with the first hydraulic pipeline (14) through the three-position three-way electromagnetic valve (8);
when the two-position two-way electromagnetic valve I (12) is connected, the two-position two-way electromagnetic valve II (13) is disconnected, and the second hydraulic pipeline (15) is communicated with the hydraulic oil tank (1) through the three-position three-way electromagnetic valve (8).
3. The tractor ABS hydraulic braking system according to claim 1 wherein the foot brake valve (7) is connected to the hydraulic tank (1) by a fourth hydraulic line (17), the fourth hydraulic line (17) being provided with a hydraulic pump (3).
4. A tractor ABS hydraulic brake system according to claim 3 wherein the first hydraulic line (14) communicates with the fourth hydraulic line (17) through the foot brake valve (7) when the foot brake valve (7) is depressed.
5. A tractor ABS hydraulic braking system according to claim 3 wherein the fourth hydraulic line (17) is provided with a non-return valve (5) between the hydraulic pump (3) and the foot brake valve (7) and the fourth hydraulic line (17) between the non-return valve (5) and the foot brake valve (7) is connected with an accumulator (6).
6. The ABS hydraulic braking system according to claim 5 is characterized in that a pressure limiting valve (4) connected to the hydraulic tank (1) is connected to a fourth hydraulic line (17) between the check valve (5) and the hydraulic pump (3).
7. The ABS hydraulic braking system of the tractor according to claim 5 wherein the foot brake valve (7) is provided with a left wheel and a right wheel, which are respectively provided corresponding to the left wheel and the right wheel of the tractor, i.e. the foot brake valve (7) on the left side is provided corresponding to the left wheel and the foot brake valve (7) on the right side is provided corresponding to the right wheel.
8. The ABS hydraulic braking system according to claim 1 wherein the three-position three-way solenoid valve (8), the two-position two-way solenoid valve one (12) and the two-position two-way solenoid valve two (13) are four and are respectively arranged in one-to-one correspondence with four wheels of the tractor.
9. A tractor ABS hydraulic braking system according to claim 3, characterized in that an oil suction filter (2) is provided on a fourth hydraulic line (17) between the hydraulic pump (3) and the hydraulic tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320044685.4U CN219096695U (en) | 2023-01-09 | 2023-01-09 | ABS hydraulic braking system of tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320044685.4U CN219096695U (en) | 2023-01-09 | 2023-01-09 | ABS hydraulic braking system of tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219096695U true CN219096695U (en) | 2023-05-30 |
Family
ID=86454162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320044685.4U Active CN219096695U (en) | 2023-01-09 | 2023-01-09 | ABS hydraulic braking system of tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219096695U (en) |
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2023
- 2023-01-09 CN CN202320044685.4U patent/CN219096695U/en active Active
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