CN210760257U - Differential lock control system of wheel loader drive axle - Google Patents
Differential lock control system of wheel loader drive axle Download PDFInfo
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- CN210760257U CN210760257U CN201921427051.7U CN201921427051U CN210760257U CN 210760257 U CN210760257 U CN 210760257U CN 201921427051 U CN201921427051 U CN 201921427051U CN 210760257 U CN210760257 U CN 210760257U
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Abstract
The utility model discloses a differential lock control system of wheel loader transaxle, it belongs to engineering machine tool technical field. The defect that a driving wheel of a traditional loader slips when the loader works on a severe road surface in the prior art is overcome. Its major structure includes power supply, service braking energy storage ware, electromagnetic reversing valve group, rocker switch, proximity switch, differential lock hydro-cylinder and differential lock shift fork, the service braking energy storage ware is connected with power supply and electromagnetic reversing valve group respectively, the electromagnetic reversing valve group still is connected with rocker switch and differential lock hydro-cylinder respectively, the jar pole one end and the differential lock shift fork of differential lock hydro-cylinder are connected. The utility model discloses mainly used engineering machine tool such as loader.
Description
The technical field is as follows:
the utility model belongs to the technical field of engineering machine tool, specifically speaking especially relates to a differential lock control system of wheel loader transaxle.
Background art:
the differential mechanism is arranged in the drive axle of the wheel loader, and is used for meeting the requirement that wheels on two sides are in an unequal distance form in a pure rolling form as far as possible, so that the friction between tires and the ground is reduced. The symmetrical axle gear differential used in the present loader has a characteristic of "differential force", and it is considered that torque is equally distributed regardless of whether the left and right drive wheels are at a constant speed, and this characteristic is satisfactory for running and working the loader on a general road surface. However, when the loader is operated under the condition of bad road surface, the passing ability of the loader is seriously affected, for example, when one wheel falls into a muddy road surface, the other wheel is on a good road surface, the driving wheel on the muddy road surface can slip, and the wheel on the good road surface is still. It is therefore necessary to install a differential lock, which locks the differential function when required.
At present, the functions of the differential lock for the automobile industry are many, the differential lock is not common in the engineering machinery industry, and the control mode of the differential lock for the automobile industry is not suitable for the engineering machinery industry.
The invention content is as follows:
in order to solve the shortcoming that the drive wheel that traditional loader operation exists skids on abominable road surface among the prior art, the utility model provides a differential lock control system who is different from prior art's wheel loader transaxle when the loader travels under the abominable road condition, launches the differential lock and comes the locking differential function, realizes good throughput.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
the utility model provides a differential lock control system of wheeled loader transaxle, includes power supply, service braking energy storage ware, electromagnetic directional valve group, rocker switch, proximity switch, differential lock hydro-cylinder and differential lock shift fork, the service braking energy storage ware is connected with power supply and electromagnetic directional valve group respectively, electromagnetic directional valve group still is connected with rocker switch and differential lock hydro-cylinder respectively, the hydro-cylinder pole one end and the differential lock shift fork of differential lock hydro-cylinder are connected.
Preferably, the differential lock control system of the wheel loader drive axle further comprises an indicator light and a buzzer, and the indicator light and the buzzer are connected in parallel and then connected with the proximity switch.
Preferably, the electromagnetic directional valve group comprises a two-position three-way directional valve and a pressure reducing valve, and the two-position three-way directional valve is connected with the pressure reducing valve.
Preferably, an oil outlet of the power source is provided with a liquid charging valve, an oil outlet of the liquid charging valve is connected with a service braking energy accumulator, and the service braking energy accumulator is provided with two positions.
Preferably, the differential lock control system of the wheel loader drive axle further comprises a brake caliper and a full hydraulic brake valve, and the full hydraulic brake valve is respectively connected with the service brake accumulator and the brake caliper.
Preferably, the power source is a hydraulic pump.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the control pressure oil of the differential lock is from a service braking energy accumulator of a braking system, an existing oil source is used, an independent power source is not required to be designed, energy is saved, cost is saved, the pressure of the service braking energy accumulator is stable and is always kept in a specific pressure range, and a high-pressure oil source and the whole service braking hydraulic system are provided with safe pressure alarm, so that the oil source of the differential lock oil cylinder is safe, reliable and stable;
2. the electromagnetic directional valve set adopts a combined design, a two-position three-way directional valve of the electromagnetic directional valve set is arranged at an oil inlet, when the electromagnetic directional valve set is electrified, the two-position three-way directional valve is connected, then pressure reduction is carried out through a pressure reducing valve in the electromagnetic directional valve set, pressure oil with a certain pressure value is supplied to an oil cylinder of the differential lock, when the electromagnetic directional valve set is not connected, leakage is very small, and meanwhile, the pressure reducing valve does not work, so that the reliability is high;
3. the electro-hydraulic control is combined, the operation is simple and convenient, and a driver can complete the locking and the releasing of the differential lock in a cab.
Description of the drawings:
fig. 1 is a hydraulic schematic diagram of the present invention.
In the figure: 1. a service braking accumulator; 2. an electromagnetic directional valve set; 3. a rocker switch; 4. an indicator light; 5. a buzzer; 6. a proximity switch; 7. a differential lock cylinder; 8. a differential lock fork; 9. a power source; 10. a liquid charging valve; 11. a brake caliper; 12. a two-position three-way reversing valve; 13. a pressure reducing valve; 14. a full hydraulic brake valve.
The specific implementation mode is as follows:
the present invention will be further described with reference to the following specific embodiments and accompanying drawings.
Example 1:
as shown in fig. 1, a differential lock control system of wheel loader transaxle, including power supply 9, service braking energy storage ware 1, electromagnetic directional valve group 2, rocker switch 3, proximity switch 6, differential lock hydro-cylinder 7 and differential lock shift fork 8, service braking energy storage ware 1 is connected with power supply 9 and electromagnetic directional valve group 2 respectively, electromagnetic directional valve group 2 still is connected with rocker switch 3 and differential lock hydro-cylinder 7 respectively, and binding post through electromagnetic directional valve group 2 is connected with rocker switch 3 and proximity switch 6 respectively, the hydro-cylinder pole one end and the differential lock shift fork 8 of differential lock hydro-cylinder 7 are connected. Proximity switch 6 and switch on, and proximity switch 6 installs on the transaxle, and proximity switch 6 is equivalent to an inductive switch, and when differential lock shift fork 8 was close to proximity switch 6, proximity switch 6 will be played (equivalent to the switch closure), and the switch on this moment.
Example 2:
the utility model provides a differential lock control system of wheel loader transaxle, still includes pilot lamp 4 and bee calling organ 5, pilot lamp 4 and bee calling organ 5 parallel connection back are connected with proximity switch 6. The rocker switch 3, the indicator light 4 and the buzzer 5 are all arranged inside the cab.
The electromagnetic directional valve group 2 comprises a two-position three-way directional valve 12 and a pressure reducing valve 13, and the two-position three-way directional valve 12 is connected with the pressure reducing valve 13. An oil inlet of the two-position three-way reversing valve 12 is connected with the service braking energy accumulator 1, a wiring terminal of the two-position three-way reversing valve 12 is respectively connected with the rocker switch 3 and the proximity switch 6, and the reducing valve 13 is respectively connected with an oil outlet of the two-position three-way reversing valve 12 and a rodless cavity of the differential lock oil cylinder 7.
An oil outlet of the power source 9 is provided with a liquid charging valve 10, an oil outlet of the liquid charging valve 10 is connected with the service braking energy accumulator 1, and the service braking energy accumulator 1 is provided with two positions. The differential lock control system of the wheel loader drive axle further comprises a brake caliper 11 and a full hydraulic brake valve 14, wherein the full hydraulic brake valve 14 is respectively connected with the service brake energy accumulator 1 and the brake caliper 11; the power source 9 is a hydraulic pump. The other portions are the same as in example 1.
The utility model discloses a theory of operation does:
the hydraulic oil of the hydraulic pump is used for filling the service brake accumulator 1 through the filling valve 10, the hydraulic oil overflows and returns to the oil tank after the filling pressure of the service brake accumulator 1 reaches a certain pressure, the hydraulic oil is filled again after the filling pressure of the service brake accumulator 1 is reduced to a certain value, the on-off state of the electromagnetic reversing valve bank 2 is controlled through the rocker switch 3, the rocker switch 3 is in a normally closed power-off state, the electromagnetic reversing valve bank 2 is communicated with the differential lock oil cylinder 7 for oil filling, the differential lock oil cylinder 7 is linked with the differential lock shifting fork 8, and the drive axle is provided with the proximity switch 6 for sensing the distance between the differential lock shifting fork 8 and the proximity switch 6.
When the loader needs to lock the differential mechanism in the operation engineering, namely, the differential lock is in effect, an operator presses the rocker switch 3, the electromagnetic directional valve group 2 is switched on, pressure oil enters the differential lock oil cylinder 7 after being decompressed through the decompression valve 13 of the electromagnetic directional valve group 2 from the service brake energy accumulator 1, the piston rod of the differential lock oil cylinder 7 extends out to drive the differential lock shifting fork 8 to rotate and approach the proximity switch 6, the proximity switch 6 is switched on, the proximity switch 6 transmits a signal to the indicator lamp 4 and the buzzer 5 at the moment, and a driver can see that the instrument panel differential mechanism locking lamp is on and hear the alarm sound of the buzzer 5. After the operation is finished, the rocker switch 3 is unscrewed, the differential lock is released, and the differential mechanism works.
Claims (6)
1. The utility model provides a differential lock control system of wheel loader transaxle which characterized in that: including power supply (9), service braking energy storage ware (1), electromagnetic directional valve group (2), rocker switch (3), proximity switch (6), differential lock hydro-cylinder (7) and differential lock shift fork (8), service braking energy storage ware (1) is connected with power supply (9) and electromagnetic directional valve group (2) respectively, electromagnetic directional valve group (2) still are connected with rocker switch (3) and differential lock hydro-cylinder (7) respectively, the hydro-cylinder pole one end and the differential lock shift fork (8) of differential lock hydro-cylinder (7) are connected.
2. The differential lock control system for a wheel loader transaxle according to claim 1, characterized in that: the differential lock control system of the wheel loader drive axle further comprises an indicator lamp (4) and a buzzer (5), wherein the indicator lamp (4) and the buzzer (5) are connected in parallel and then connected with a proximity switch (6).
3. The differential lock control system for a wheel loader transaxle according to claim 1 or 2, characterized in that: the electromagnetic directional valve group (2) comprises a two-position three-way directional valve (12) and a pressure reducing valve (13), and the two-position three-way directional valve (12) is connected with the pressure reducing valve (13).
4. The differential lock control system for a wheel loader transaxle according to claim 3 wherein: an oil outlet of the power source (9) is provided with a liquid charging valve (10), an oil outlet of the liquid charging valve (10) is connected with the service braking energy accumulator (1), and the service braking energy accumulator (1) is provided with two positions.
5. The differential lock control system for a wheel loader transaxle according to claim 4, characterized in that: the differential lock control system of the wheel loader drive axle further comprises a brake caliper (11) and a full hydraulic brake valve (14), wherein the full hydraulic brake valve (14) is respectively connected with the service brake energy accumulator (1) and the brake caliper (11).
6. The differential lock control system for a wheel loader transaxle according to claim 5, characterized in that: the power source (9) is a hydraulic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921427051.7U CN210760257U (en) | 2019-08-29 | 2019-08-29 | Differential lock control system of wheel loader drive axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921427051.7U CN210760257U (en) | 2019-08-29 | 2019-08-29 | Differential lock control system of wheel loader drive axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210760257U true CN210760257U (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921427051.7U Active CN210760257U (en) | 2019-08-29 | 2019-08-29 | Differential lock control system of wheel loader drive axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210760257U (en) |
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2019
- 2019-08-29 CN CN201921427051.7U patent/CN210760257U/en active Active
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