CN219345106U - Control system is relieved in wheel limit electric drive speed reducer hydraulic braking - Google Patents
Control system is relieved in wheel limit electric drive speed reducer hydraulic braking Download PDFInfo
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- CN219345106U CN219345106U CN202223466358.2U CN202223466358U CN219345106U CN 219345106 U CN219345106 U CN 219345106U CN 202223466358 U CN202223466358 U CN 202223466358U CN 219345106 U CN219345106 U CN 219345106U
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- parking device
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- speed reducer
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Abstract
The utility model discloses a hydraulic braking release control system of a wheel-side electric drive speed reducer, and relates to a braking system. Comprises a one-way oil supply device for providing high-pressure hydraulic oil; an accumulator for storing the high-pressure hydraulic oil; the zero leakage reversing valve is used for opening a pipeline between the energy accumulator and the spring parking device when receiving a brake release instruction so as to enable the high-pressure hydraulic oil to be conveyed to the spring parking device; when a braking instruction is received, cutting off a pipeline between the energy accumulator and the spring parking device; and the control valve is arranged between the spring parking device and a connecting pipeline of the one-way oil supply device. The utility model saves space, reduces cost, has compact structure, avoids electric energy loss caused by the fact that the oil pump is always in a rated power working state in the traditional brake release system, and plays a role in saving energy.
Description
Technical Field
The utility model relates to a braking system, in particular to a hydraulic braking release control system of a wheel-side electric drive speed reducer.
Background
The traditional skid steer loader all engines are powered at present, the walking is driven by a hydraulic motor, and the system is provided with high-pressure hydraulic oil to drive the walking motor during walking, so that the high-pressure hydraulic oil can be provided for a braking system in real time to realize that a spring parking device releases the parking brake of a brake disc.
However, after the skid steer loader is driven by electricity, there are two general ways to brake the skid steer loader. First, when braking is required, braking can be achieved by a walking reducer connected to the motor. Secondly, the high-pressure hydraulic oil drives the spring parking device to brake or release the brake of the brake disc. Because of the high reliability of the hydraulic parking system, the current mainstream braking systems still employ hydraulic braking.
For this reason, the electric skid steer loader parking brake system still requires a fuel tank and an oil pump. In order to ensure timeliness of the action of the spring brake, the oil pump is required to be always in a rated power working state when the whole vehicle works so as to provide high-pressure hydraulic oil at any time. When the parking brake is required to be released, the oil pump conveys high-pressure hydraulic oil to the spring parking device so as to release the brake of the brake disc; when braking is needed, the injection of hydraulic oil is stopped, and the hydraulic oil in the spring parking device is discharged.
However, the oil pump is always in a rated working state when the whole machine works. The electric energy is wasted on the pure electric skid steer loader, and the continuous voyage of the pure electric skid steer loader is not facilitated.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides the hydraulic braking release control system of the wheel-side electric drive speed reducer, which avoids the electric energy loss caused by the fact that the oil pump is always in a rated power working state in the traditional braking release system and plays a role in saving energy.
The utility model relates to a hydraulic braking release control system of a wheel-side electric drive speed reducer, which comprises the following components:
the unidirectional oil supply device is used for providing high-pressure hydraulic oil;
an accumulator for storing the high-pressure hydraulic oil;
the zero leakage reversing valve is used for opening a pipeline between the energy accumulator and the spring parking device when receiving a brake release instruction so as to enable the high-pressure hydraulic oil to be conveyed to the spring parking device; when a braking instruction is received, cutting off a pipeline between the energy accumulator and the spring parking device;
and the control valve is arranged between the spring parking device and a connecting pipeline of the one-way oil supply device.
The one-way oil supply device comprises an oil tank, an oil pump and a first one-way valve; the input end of the oil pump is communicated with the oil tank, the output end of the oil pump is connected with the input end of the first one-way valve through an oil pipe, and the output end of the first one-way valve is connected with the energy accumulator.
The one-way oil supply device further comprises a pressure reducing valve, and the pressure reducing valve is arranged on an oil pipe connected with the oil pump and the first one-way valve.
The output end of the oil pump is connected with a hydraulic cylinder of the skid steer loader through a reversing valve.
And a pressure switch is arranged on a pipeline connected with the spring parking device through the zero-leakage reversing valve, and the pressure switch is electrically connected with the walking motor through the ECU.
The zero leakage reversing valve consists of an electromagnetic reversing valve and a valve core self-locking structure for locking and positioning the valve core of the electromagnetic reversing valve.
The valve core self-locking structure comprises a valve core clamping electromagnetic valve, a valve rod, a spring and a positioning groove arranged on a valve core of the electromagnetic reversing valve; the valve core clamping electromagnetic valve is fixedly arranged at one end of the electromagnetic reversing valve, the valve rod is fixedly arranged at one end of the valve core clamping electromagnetic valve, and the valve rod sequentially penetrates through the valve core clamping electromagnetic valve and the shell of the electromagnetic reversing valve and contacts with the valve core of the electromagnetic reversing valve; the valve rod is located one end side wall in the electromagnetic reversing valve and is fixedly provided with a limiting piece, and the spring is sleeved on the valve rod above the limiting piece.
And a second one-way valve is arranged on a pipeline connected with the zero-leakage reversing valve by the spring parking device.
Advantageous effects
The utility model has the advantages that:
1. through the arrangement of the energy accumulator and the zero leakage reversing valve, only high-pressure hydraulic oil is reserved in the energy accumulator in advance, so that when the braking of the brake disc needs to be released, an oil pump is not required to be started, and only the hydraulic oil in the energy accumulator needs to be sent to the spring brake. The electric energy loss caused by the fact that the oil pump is always in a rated power working state in the traditional brake release system is avoided, and the effect of saving energy is achieved.
2. The valve between the energy accumulator and the spring brake adopts a zero-leakage reversing valve, so that the leakage amount is small, and the zero-leakage reversing valve is not required to work all the time after the valve core acts, thereby further reducing the energy consumption.
3. The hydraulic cylinder and the energy accumulator share one oil pump, so that the functions of saving space, reducing cost and having compact structure are achieved.
Drawings
FIG. 1 is a schematic diagram of a hydraulic brake release control system according to the present utility model;
FIG. 2 is a schematic view of the zero leakage reversing valve of the present utility model in a self-locking release state;
FIG. 3 is a schematic view of the zero leakage reversing valve of the present utility model in a self-locking state;
fig. 4 is an enlarged schematic view of the structure at a in fig. 2.
Wherein: 1-oil tank, 2-oil pump, 3-switching-over valve, 4-pneumatic cylinder, 5-relief pressure valve, 6-first check valve, 7-energy storage ware, 8-pressure switch, 9-zero leakage switching-over valve, 10-spring parking ware, 11-running motor, 91-electromagnetic reversing valve, 92-case, 93-case screens solenoid valve, 94-valve rod, 95-spring, 96-spacing piece, 97-positioning groove.
Detailed Description
The utility model is further described below in connection with the examples, which are not to be construed as limiting the utility model in any way, but rather as falling within the scope of the claims.
Referring to fig. 1-4, the hydraulic braking release control system of the wheel-side electrically-driven speed reducer comprises a unidirectional oil supply device, an accumulator 7, a zero-leakage reversing valve 9 and a control valve.
The one-way oil supply device is used for providing high-pressure hydraulic oil. The one-way oil supply device comprises an oil tank 1, an oil pump 2, a pressure reducing valve 5 and a first one-way valve 6.
The input of oil pump 2 is linked together with oil tank 1, and the output of oil pump 2 is connected with the input of first check valve 6 through oil pipe, and relief valve 5 is installed on the oil pipe that oil pump 2 and first check valve 6 are connected. The provision of the relief valve 5 prevents the oil pressure input into the accumulator 7 from being excessively high, resulting in a problem that the oil pressure in the accumulator 7 exceeds the set pressure value. The output of the first non-return valve 6 is connected to an accumulator 7. The first check valve 6 is used to prevent the problem of the hydraulic oil in the accumulator 7 flowing back into the tank 1.
The accumulator 7 is used for storing high-pressure hydraulic oil and delivering the high-pressure hydraulic oil to the outside.
The input of the hydraulic cylinder 4 is furthermore connected to the output of the oil pump 2 via a reversing valve 3. The hydraulic cylinder 4 is a hydraulic cylinder used for lifting the bucket on the skid steer loader. I.e. the hydraulic cylinder 4 and the accumulator 7 of the present embodiment share one oil pump 2. When the skid steer loader is just started, the oil pump 2 rotates. When the hydraulic cylinder 4 does not act, the reversing valve 3 is in the neutral position, the oil of the oil pump 2 directly flows back to the oil tank, the pressure of the output port of the oil pump 2 is very low, and oil cannot be supplied to the accumulator 7. When the reversing valve 3 is reversed, the oil path of the oil pump 2 flowing back to the oil tank is cut off, the pressure of the output port of the oil pump 2 is increased, and the accumulator 7 or the hydraulic cylinder 4 is filled with hydraulic oil. Through the arrangement, the dual-purpose function of a single pump is realized, the space is saved, the cost is reduced, and the overall compactness of the system is improved.
The zero leakage reversing valve 9 is used for opening a pipeline between the energy accumulator 7 and the spring parking device 10 when a brake release instruction is received so as to enable high-pressure hydraulic oil to be conveyed to the spring parking device 10; and upon receiving a braking command, the line between the accumulator 7 and the spring parking device 10 is cut off.
In the present embodiment, the zero-leakage directional valve 9 is composed of an electromagnetic directional valve 91 and a spool self-locking structure for locking and positioning the spool 92 of the electromagnetic directional valve 91. The electromagnetic directional valve 91 is of the DLEH or DLEHM type.
The valve core self-locking structure comprises a valve core clamping electromagnetic valve 93, a valve rod 94, a spring 95 and a positioning groove 97 arranged on the valve core 92 of the electromagnetic reversing valve 91. The valve core clamping electromagnetic valve 93 is fixedly arranged at one end of the electromagnetic directional valve 91, the valve rod 94 is fixedly arranged at one end of the valve core clamping electromagnetic valve 93, and the valve rod 94 sequentially penetrates through the valve core clamping electromagnetic valve 93 and the shell of the electromagnetic directional valve 91 and contacts with the valve core 92 of the electromagnetic directional valve 91. A limit piece 96 is fixedly arranged on the side wall of one end of the valve rod 94 positioned in the electromagnetic directional valve 91, and a spring 95 is sleeved on the valve rod 94 above the limit piece 96.
When the electromagnetic directional valve 91 is energized, the spool 92 of the electromagnetic directional valve 91 is actuated, and the position of the spool 92 is moved from the position shown in fig. 2 to the position shown in fig. 3, whereby the internal passage of the electromagnetic directional valve 91 is conducted. And at this time, the positioning groove 97 on the valve core 92 corresponds to the valve rod 94 in position, and the valve rod 94 falls into the positioning groove 97 under the action of the spring 95, so that the self-locking of the valve core 92 is realized, the electromagnetic directional valve 91 of the valve core 92 is powered off, and the valve core 92 is not reset. That is, the hydraulic oil in the accumulator 7 can be supplied to the spring parking device 10 through the electromagnetic directional valve 91, so that the spring parking device 10 is always in the parking-released state.
After the running motor 11 stops running, the ECU sends an electrical signal to the spool-clamping solenoid valve 93 to power it off after it gets power. When the valve core clamping electromagnetic valve 93 is powered, the valve core of the valve core clamping electromagnetic valve 93 moves upwards, so that the valve rod 94 is driven to move upwards, and the valve rod is separated from the positioning groove 97. At this time, the spool 92 of the electromagnetic directional valve 91 is reset by the internal reset spring, so that the inner chamber of the electromagnetic directional valve 91 is in the off state, and the supply of hydraulic oil to the spring parking device 10 is cut off.
The control valve is installed between the spring parking device 10 and the connecting pipeline of the oil tank 1. When the braking state of the spring parking device 10 on the brake disc needs to be released, the energy accumulator 7 supplies oil to the spring parking device 10, and the control valve is in a closed state, so that the pressure state of hydraulic oil in the spring parking device 10 is consistent with that of the hydraulic oil in the energy accumulator 7. When the spring parking device 10 is required to brake the brake disc, the control valve is opened to discharge hydraulic oil in the spring parking device 10 into the oil tank 1, so that the spring parking device 10 is reset, and the brake disc of the skid steer loader is braked.
In order to avoid the hydraulic oil in the spring parking device 10 from flowing back, a second one-way valve is arranged on a pipeline connected with the zero-leakage reversing valve 9 by the spring parking device 10.
The zero leakage reversing valve 9 is connected with a pipeline connected with the spring parking device 10, and the pressure switch 8 is electrically connected with the walking motor 11 through the ECU. The pressure switch 8 is used for controlling the action of the walking motor 11. When the pipeline connected with the spring parking device 10 through the zero leakage reversing valve 9 is provided with high-pressure hydraulic oil, the pressure switch 8 is closed, and after the ECU receives an electric signal sent by the pressure switch 8, the ECU sends a control signal to drive the traveling motor 11 to start.
The working principle of the utility model is as follows: when the skid steer loader is started, the oil pump 2 rotates. When the hydraulic cylinder 4 is not operating, the reversing valve 3 is in the neutral position and the oil of the oil pump 2 directly flows back to the oil tank. When the reversing valve 3 reverses to conduct the line between the oil pump 2 and the accumulator 7, the oil pump 2 delivers the hydraulic oil in the oil tank 1 to the accumulator 7. And after the accumulator 7 is filled with high-pressure hydraulic oil, the reversing valve 3 reverses again to make it in the middle position. Since the pumped oil of the oil pump 2 flows back to the oil tank 1 when the reversing valve 3 is in the neutral position, the oil pump 2 can be in a closed or idle operation state at this time, so that the consumption of electric energy is reduced, and the effect of saving energy is achieved.
When the braking of the spring parking device 10 to the brake disc needs to be released, the valve core 92 of the zero leakage reversing valve 9 acts to conduct a pipeline between the energy accumulator 7 and the spring parking device 10, the control valve is in a closed state, the energy accumulator 7 supplies oil to the spring parking device 10, and the spring parking device 10 releases the braking of the brake disc. When the brake disc is required to be braked, the valve core 92 of the zero-leakage reversing valve 9 is reset, so that a pipeline between the energy accumulator 7 and the spring parking device 10 is closed, the control valve is in an open state, hydraulic oil in the spring parking device 10 flows back to the oil tank 1, the spring parking device 10 is reset, and the brake disc is braked.
While only the preferred embodiments of the present utility model have been described above, it should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these do not affect the effect of the implementation of the present utility model and the utility of the patent.
Claims (7)
1. The hydraulic braking release control system of the wheel-side electric drive speed reducer is characterized by comprising a unidirectional oil supply device, an energy accumulator (7), a zero-leakage reversing valve (9) and a control valve; the output end of the one-way oil supply device is connected with the input end of the energy accumulator (7), the output end of the energy accumulator (7) is connected with the input end of the zero-leakage reversing valve (9), the output end of the zero-leakage reversing valve (9) is connected with the input end of the spring parking device (10), the spring parking device (10) is connected with the one-way oil supply device through a pipeline, and a control valve is arranged on a connecting pipeline of the spring parking device (10) and the one-way oil supply device;
the zero leakage reversing valve (9) is composed of an electromagnetic reversing valve (91) and a valve core self-locking structure for locking and positioning a valve core (92) of the electromagnetic reversing valve (91).
2. The wheel-side electrically-driven speed reducer hydraulic braking release control system according to claim 1, wherein the one-way oil supply device comprises an oil tank (1), an oil pump (2) and a first one-way valve (6); the input end of the oil pump (2) is communicated with the oil tank (1), the output end of the oil pump (2) is connected with the input end of the first one-way valve (6) through an oil pipe, and the output end of the first one-way valve (6) is connected with the energy accumulator (7).
3. The hydraulic brake release control system of the wheel-side electrically-driven speed reducer according to claim 2, wherein the output end of the oil pump (2) is connected with a hydraulic cylinder (4) of the skid steer loader through a reversing valve (3).
4. The hydraulic brake release control system of the wheel-side electrically-driven speed reducer according to claim 2, wherein the one-way oil supply device further comprises a pressure reducing valve (5), and the pressure reducing valve (5) is mounted on an oil pipe connecting the oil pump (2) with the first one-way valve (6).
5. The hydraulic braking release control system of the wheel-side electric drive speed reducer according to claim 1, wherein a pressure switch (8) is arranged on a pipeline connected with the spring parking device (10) through the zero-leakage reversing valve (9), and the pressure switch (8) is electrically connected with a walking motor (11) through an ECU.
6. The hydraulic braking release control system of the wheel-side electric drive speed reducer according to claim 1, wherein the valve core self-locking structure comprises a valve core clamping electromagnetic valve (93), a valve rod (94), a spring (95) and a positioning groove (97) arranged on a valve core (92) of the electromagnetic reversing valve (91); the valve core clamping electromagnetic valve (93) is fixedly arranged at one end of the electromagnetic directional valve (91), the valve rod (94) is fixedly arranged at one end of the valve core clamping electromagnetic valve (93), and the valve rod (94) sequentially penetrates through the valve core clamping electromagnetic valve (93) and the shell of the electromagnetic directional valve (91) and contacts with the valve core (92) of the electromagnetic directional valve (91); a limiting piece (96) is fixedly arranged on the side wall of one end of the valve rod (94) located in the electromagnetic reversing valve (91), and the spring (95) is sleeved on the valve rod (94) above the limiting piece (96).
7. The hydraulic brake release control system of the wheel-side electrically-driven speed reducer according to claim 1, wherein a second one-way valve is installed on a pipeline connected with the zero-leakage reversing valve (9) by the spring parking device (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223466358.2U CN219345106U (en) | 2022-12-23 | 2022-12-23 | Control system is relieved in wheel limit electric drive speed reducer hydraulic braking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223466358.2U CN219345106U (en) | 2022-12-23 | 2022-12-23 | Control system is relieved in wheel limit electric drive speed reducer hydraulic braking |
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| Publication Number | Publication Date |
|---|---|
| CN219345106U true CN219345106U (en) | 2023-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223466358.2U Active CN219345106U (en) | 2022-12-23 | 2022-12-23 | Control system is relieved in wheel limit electric drive speed reducer hydraulic braking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219345106U (en) |
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2022
- 2022-12-23 CN CN202223466358.2U patent/CN219345106U/en active Active
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