CN214729101U - Double-motor synchronous hydraulic steering system based on double-flow transmission and tracked vehicle - Google Patents
Double-motor synchronous hydraulic steering system based on double-flow transmission and tracked vehicle Download PDFInfo
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- CN214729101U CN214729101U CN202120500093.XU CN202120500093U CN214729101U CN 214729101 U CN214729101 U CN 214729101U CN 202120500093 U CN202120500093 U CN 202120500093U CN 214729101 U CN214729101 U CN 214729101U
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Abstract
The utility model provides a synchronous hydraulic steering system of double motor and tracked vehicle based on double-flow transmission belongs to vehicle technical field, and the synchronous hydraulic steering system of double motor includes: the bidirectional variable pump is connected with the engine and is controlled by a steering wheel; the hydraulic motor A and the hydraulic motor B are respectively communicated with the bidirectional variable pump, and are communicated with each other to form a hydraulic synchronizer structure; the differential is connected with the gearbox, an output left half shaft/output right half shaft of the differential is connected with the hydraulic motor A, and a crawler driving wheel A is further mounted on the output left half shaft/output right half shaft; and the output right half shaft/output left half shaft of the differential mechanism is connected with the hydraulic motor B, and the output right half shaft/output left half shaft is also provided with a crawler driving wheel B. The utility model discloses can realize the double-flow transmission effect, have hydraulic drive simultaneously on guaranteeing high-efficient mechanical transmission's basis and turn to accurate nimble advantage.
Description
Technical Field
The utility model belongs to the technical field of the vehicle, concretely relates to synchronous hydraulic steering system of double motor based on double-flow transmission, in addition, the utility model discloses still relate to a tracked vehicle including the above-mentioned synchronous hydraulic steering system of double motor based on double-flow transmission.
Background
Because the crawler-type vehicle has stronger adaptability, compared with a wheeled vehicle, the crawler-type vehicle has wider application in the fields of fire-fighting emergency rescue, exploration, off-road and the like.
The conventional high-speed tracked vehicle changes the speeds of the two tracks by changing the speeds of the two tracks, but the conventional high-speed tracked vehicle still adopts a clutch-brake type steering mechanism according to the principle although the conventional high-speed tracked vehicle changes the speeds of the two tracks by means of two independent automatic transmissions, the brake steering scheme has the defects of large power damage and low steering precision, and the problem of difficult steering control can occur during high-speed running, so that accidents such as overturning and the like are easily caused by over-steering.
The conventional low-speed crawler vehicle adopts a full hydraulic transmission structure, and although the transmission structure is accurate in control and flexible in arrangement, the transmission efficiency is low, and the conventional low-speed crawler vehicle is only suitable for low-speed engineering vehicles.
SUMMERY OF THE UTILITY MODEL
Based on the background problem, the utility model aims at providing a double-motor synchronous hydraulic steering system based on double-flow transmission, which can realize the double-flow transmission effect of the crawler vehicle and has the advantages of accurate and flexible hydraulic transmission steering on the basis of ensuring high-efficiency mechanical transmission; another object of the present invention is to provide a tracked vehicle comprising the above dual-motor synchronous hydraulic steering system based on dual-flow transmission.
In order to achieve the above object, on the one hand, the embodiment of the present invention provides a technical solution:
double-motor synchronous hydraulic steering system based on double-flow transmission comprises:
the bidirectional variable pump is connected with the engine and is controlled by a steering wheel;
the hydraulic motor A and the hydraulic motor B are respectively communicated with the bidirectional variable pump, and are communicated with each other to form a hydraulic synchronizer structure;
the differential is connected with the gearbox, an output left half shaft/output right half shaft of the differential is connected with the hydraulic motor A, and a crawler driving wheel A is further mounted on the output left half shaft/output right half shaft; and the output right half shaft/output left half shaft of the differential mechanism is connected with the hydraulic motor B, and the output right half shaft/output left half shaft is also provided with a crawler driving wheel B.
In one embodiment, the bidirectional variable displacement pump is an axial piston pump, the swash plate of which is connected to the steering wheel of the vehicle.
In one embodiment, the hydraulic oil outlet of the hydraulic motor A is communicated with the hydraulic oil inlet of the hydraulic motor B, and the hydraulic oil outlet of the hydraulic motor B is communicated with the hydraulic oil inlet of the hydraulic motor A to form a double-motor hydraulic circuit.
Preferably, when the steering wheel rotates clockwise/anticlockwise, the bidirectional variable pump outputs hydraulic oil proportional to the rotation angle of the steering wheel, the hydraulic oil enters the double-motor hydraulic circuit, and the A hydraulic motor/B hydraulic motor is converted into a pump working condition.
In one embodiment, the differential is further provided with a brake on the input drive shaft side.
In one embodiment, the differential output left/right half shafts are connected to the A hydraulic motor through an A gear train, the A gear train comprising:
a side gear disposed on an output left half shaft/output right half shaft of the differential;
a motor gear provided on an output shaft of the hydraulic motor A;
the chain is wound on the half axle gear and the motor gear;
and the output right half shaft/output left half shaft of the differential is connected with the hydraulic motor B through a transmission mechanism B, and the transmission mechanism B has the same structure as the transmission mechanism A.
In one embodiment, the bidirectional variable pump is also communicated with a fluid infusion pump, the fluid infusion pump is communicated with the oil tank through an oil pipe, and a filter is arranged on the oil pipe.
Preferably, the bidirectional variable pump is also communicated with a heat dissipation accessory, a cleaning accessory, a reversing accessory and a protection accessory.
On the other hand, the utility model provides a tracked vehicle still, including automobile body, A track, B track and foretell double motor synchronous hydraulic steering system based on double current transmission.
In one embodiment, the a track is disposed about the a track drive wheel and the B track is disposed about the B track drive wheel.
Compared with the prior art, the utility model discloses following effect has:
1. the double-motor synchronous hydraulic steering system based on double-flow transmission comprises a bidirectional variable pump, an A hydraulic motor, a B hydraulic motor and a differential mechanism, and when the steering system is steered, the output flow of the bidirectional variable pump is proportional to the rotation angle of a steering wheel, so that the steering system can realize the accurate control; a hydraulic motor, B hydraulic motor reach the double current transmission effect with the differential mechanism cooperation, and transmission efficiency is high, the utility model discloses have hydraulic drive simultaneously on guaranteeing high-efficient mechanical transmission's basis and turn to accurate nimble advantage.
2. The utility model discloses a A hydraulic motor, B hydraulic motor communicate each other, when turning to, A hydraulic motor, B hydraulic motor each other are pump operating mode and motor operating mode, can slow down the inboard track braking of direction of rotation to shift power to outside track, this process braking power is lossless basically, therefore engine power increases a little, and the tracked vehicle can turn to by arbitrary radius, and the action is soft, does not lose speed.
3. The utility model discloses a two-way variable pump is controlled by the steering wheel, turns to about when going like this that the track can form force feedback on the sloping cam plate of two-way variable pump because of the road conditions difference causes A hydraulic motor, B hydraulic motor's pressure variation, exactly is that the steering wheel has the road feel of certain degree to the manipulation of the high-speed driving of increase to tracked vehicle feels, and this is that full hydraulic drive tracked vehicle does not possess.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.
Fig. 1 is a schematic structural diagram of a double-motor synchronous hydraulic steering system based on double-flow transmission in embodiment 1 of the present invention;
fig. 2 is a schematic diagram of a specific structure of a dual-motor hydraulic circuit in embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like indicate the orientation or positional relationship based on the use state of the product, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Example 1
In order to solve the present full hydraulic drive's inefficiency and the low shortcoming of pure mechanical transmission steering control precision, the embodiment of the utility model provides a synchronous hydraulic steering system of double motor based on double fluid transmission, as shown in fig. 1 and 2, including two-way variable pump 1, A hydraulic motor 2, B hydraulic motor 3, differential mechanism 4.
In the embodiment, the bidirectional variable pump 1 is controlled by a steering wheel to control the output flow of the bidirectional variable pump 1 according to the steering angle of the steering wheel; specifically, the bidirectional variable displacement pump 1 is an axial plunger pump for providing hydraulic power to the hydraulic motors a 2 and B3, and a swash plate of the axial plunger pump is connected to a steering wheel of a vehicle to control the bidirectional variable displacement pump 1 through the steering wheel.
In order to supplement oil, as shown in fig. 2, the bidirectional variable pump 1 is further communicated with a fluid supplement pump 101, the fluid supplement pump 101 is communicated with the oil tank 5 through an oil pipe, and the oil pipe is provided with a filter 102.
As shown in fig. 2, the bidirectional variable displacement pump 1 is also communicated with a heat dissipation part, a cleaning part, a reversing part and a protection part. The heat dissipating fitting includes a radiator 103, the cleaning fitting includes a flush valve 104, the reversing fitting includes a reversing valve 105, the protection fitting includes a check valve 106, an overflow valve 107, which are configured in the conventional art, and this embodiment will not be described in detail
In the present embodiment, the a hydraulic motor 2 and the B hydraulic motor 3 are respectively communicated with the bidirectional variable displacement pump 1, and the a hydraulic motor 2 and the B hydraulic motor 3 are communicated with each other to form a hydraulic synchronizer structure.
Specifically, the hydraulic oil import of A hydraulic motor 2 and two-way variable pump 1 intercommunication, the hydraulic oil export of A hydraulic motor 2 with the hydraulic oil import of B hydraulic motor 3 intercommunication, the hydraulic oil import of B hydraulic motor 3 with two-way variable pump 1 intercommunication, the hydraulic oil export of B hydraulic motor 3 with the hydraulic oil import of A hydraulic motor intercommunication to form two motor hydraulic circuit, hydraulic oil circulation flow between A hydraulic motor 2 and B hydraulic motor 3 promptly.
In the present embodiment, the differential 4 is connected to a transmission case, and the differential 4 includes an output left half shaft 401, an output right half shaft 402, an input drive shaft 403, and the like.
Specifically, as shown in fig. 1, the output left half shaft 401 is connected to the a hydraulic motor 2, and an a crawler driving wheel 404 is further mounted at an end of the output left half shaft 401; the output right half shaft 402 is connected with the B hydraulic motor 3, and the end part of the output right half shaft 402 is also provided with a B crawler driving wheel 405; the input drive shaft 403 is connected to the gearbox.
In this embodiment, the output left half shaft 401 is connected to the a hydraulic motor 2 through an a transmission mechanism, specifically, the a transmission mechanism includes: a left side gear 406, an A motor gear 407, and a left side chain 408.
Specifically, the left side gear 406 is sleeved on the output left side shaft 401, the a motor gear 407 is connected to the output shaft of the a hydraulic motor 2, and the left side chain 408 is wound around the left side gear 406 and the a motor gear 407.
The output right half shaft 402 is connected with the B hydraulic motor 3 through a B transmission mechanism, which includes: right half shaft gear 409, B motor gear 410, right half shaft chain 411.
The right half shaft gear 409 is sleeved on the output right half shaft 402, the B motor gear 410 is connected to the output shaft of the B hydraulic motor 3, and the right half shaft chain 411 is wound on the right half shaft gear 409 and the B motor gear 410.
Through the structure, the hydraulic motor A2, the hydraulic motor B3, the crawler driving wheel A404 and the crawler driving wheel B405 can synchronously rotate, namely the rotating speeds of the crawler driving wheel A404 and the crawler driving wheel B405 can be synchronously rotated twice during straight running, and the power of the inner driving wheel and the outer driving wheel can be circulated during steering, so that the steering of the crawler vehicle is efficiently and accurately controlled, and no energy loss is generated.
It should be noted that the a transmission mechanism and the B transmission mechanism are not limited to the chain transmission of the embodiment, and in other embodiments, gear engagement transmission, belt transmission, and the like may be adopted.
In this embodiment, a brake 412 is also mounted to the input end (i.e., the side of the propeller shaft 403) of the differential 4. since engine power is input to the differential 4 via the transmission propeller shaft and the brake 412 when the tracked vehicle is in a traveling state, the brake 412 is mounted to the input end of the differential 4 because the tracked vehicle is not able to directly brake either the a track drive wheel 404 or the B track drive wheel 405 because the tracked vehicle is continuously turning in a braking state.
When the tracked vehicle is in a straight-ahead state, the bidirectional variable pump 1 is in a zero position, at the moment, the displacement of the hydraulic motor A2 is the same as that of the hydraulic motor B3, the flow of hydraulic oil flowing through the hydraulic motor A2 is the same as that of hydraulic oil flowing through the hydraulic motor B3, and the rotating speeds of output shafts of the hydraulic motor A2 and the hydraulic motor B3 are the same under the precondition of neglecting internal leakage, so that the tracked drive wheel A404 and the tracked drive wheel B405 which are described later are driven to synchronously rotate, and the vehicle is driven to go straight.
When the speed of the left track of the tracked vehicle is reduced due to the increase of ground resistance, the left A hydraulic motor 2 enters a motor working condition, the right B hydraulic motor 3 enters a pump working condition due to the fact that the speed is higher, the excluded flow is slightly larger, power is transferred to the left side, the rotating speeds of the A track driving wheel 404 and the B track driving wheel 405 are synchronized, therefore, when the steering wheel is located at a zero position, the tracked vehicle moves straight, mechanical power transmitted by the gearbox and the differential mechanism 4 circulates between the A hydraulic motor 2 and the B hydraulic motor 3, and the main power of the tracked vehicle in the process of moving comes from mechanical power flow.
When the steering wheel rotates clockwise (rotates to the right side in fig. 1), the bidirectional variable pump 1 outputs hydraulic oil in the forward direction to form hydraulic power flow, the flow rate of the hydraulic oil is proportional to the rotation angle of the steering wheel, at the moment, the hydraulic oil is converged into the double-motor hydraulic loop, the oil pressure direction is the same as the output oil pressure direction of the hydraulic motor B3, namely, the hydraulic motor B3 and the bidirectional variable pump 1 simultaneously provide the hydraulic oil for the hydraulic motor A2, the hydraulic motor B3 absorbs the power of the right-side crawler belt (inner-side crawler belt) to enter the pump working condition, brakes and decelerates the right-side crawler belt, and transfers the power to the left-side crawler belt (outer-side crawler belt), at the moment, the flow rate flowing through the hydraulic motor A2 is the sum of the power of the right-side crawler belt and the power of the bidirectional variable pump 1, namely, the flow rate flowing through the hydraulic motor A2 is increased, the rotation speed of the hydraulic motor A2 is increased, and the hydraulic motor B has a difference value, thereby completing the clockwise rotation of the vehicle in the traveling state.
When the steering wheel rotates anticlockwise (rotates towards the left side in fig. 1), the hydraulic motor 2A and the bidirectional variable pump 1 provide hydraulic oil for the hydraulic motor 3B at the same time, the hydraulic motor 2A absorbs power of the left side crawler belt (inner side crawler belt) to enter a pump working condition, the left side crawler belt is braked and decelerated, the power is transferred to the right side crawler belt (outer side crawler belt), the flow passing through the hydraulic motor 3B is the sum of the power of the left side crawler belt and the power of the bidirectional variable pump 1, namely the flow passing through the hydraulic motor 3B is increased, the rotating speed of the hydraulic motor 3B is increased, the hydraulic motor 3B and the hydraulic motor 2A are different, and therefore the anticlockwise rotation of the vehicle in a walking state is completed.
In the steering process, the power transfer of the inner side crawler belt to the outer side crawler belt exists, no braking power loss exists, and the power of the engine is not increased much, so that the crawler vehicle can steer at any radius, the action is soft, and the speed is not lost. When the crawler is turned and driven, pressure changes of the hydraulic motor A2 and the hydraulic motor B3 caused by different road conditions of the left crawler and the right crawler can form force feedback on a swash plate of the bidirectional variable pump 1, namely the steering wheel has certain road feel, so that the control feel of high-speed driving of the crawler vehicle is increased, which is not possessed by a full-hydraulic transmission crawler vehicle.
Example 2
The crawler-type vehicle comprises a vehicle body, an A crawler, a B crawler and the double-motor synchronous hydraulic steering system based on double-flow transmission in embodiment 1, wherein the A crawler is wound on the A crawler driving wheel, and the B crawler is wound on the B crawler driving wheel.
It should be noted that, for those skilled in the art, without departing from the inventive concept, several variations and modifications can be made, which are within the scope of the present invention.
Claims (10)
1. Double-motor synchronous hydraulic steering system based on double-flow transmission is characterized by comprising:
the bidirectional variable pump is connected with the engine and is controlled by a steering wheel;
the hydraulic motor A and the hydraulic motor B are respectively communicated with the bidirectional variable pump, and are communicated with each other to form a hydraulic synchronizer structure;
the differential is connected with the gearbox, an output left half shaft/output right half shaft of the differential is connected with the hydraulic motor A, and a crawler driving wheel A is further mounted on the output left half shaft/output right half shaft; and the output right half shaft/output left half shaft of the differential mechanism is connected with the hydraulic motor B, and the output right half shaft/output left half shaft is also provided with a crawler driving wheel B.
2. The dual-flow transmission based dual-motor synchronous hydraulic steering system according to claim 1, wherein the bidirectional variable pump is an axial piston pump, and a swash plate of the axial piston pump is connected with a steering wheel of a vehicle.
3. The dual-flow transmission based dual-motor synchronous hydraulic steering system according to claim 1, wherein the hydraulic oil outlet of the hydraulic motor A is communicated with the hydraulic oil inlet of the hydraulic motor B, and the hydraulic oil outlet of the hydraulic motor B is communicated with the hydraulic oil inlet of the hydraulic motor A to form a dual-motor hydraulic circuit.
4. The dual-flow transmission based dual-motor synchronous hydraulic steering system according to claim 3, wherein when the steering wheel rotates clockwise/counterclockwise, the bidirectional variable pump outputs hydraulic oil proportional to the rotation angle of the steering wheel, the hydraulic oil enters the dual-motor hydraulic circuit, and the A hydraulic motor/B hydraulic motor is converted into a pump working condition.
5. The dual-flow transmission based dual-motor synchronous hydraulic steering system according to claim 1, wherein a brake is further provided on the input drive shaft side of the differential.
6. The dual flow drive based dual motor synchronous hydraulic steering system of claim 1, wherein the output left/right half shafts of the differential are connected to the A hydraulic motor through an A gear train, the A gear train comprising:
a side gear disposed on an output left half shaft/output right half shaft of the differential;
a motor gear provided on an output shaft of the hydraulic motor A;
the chain is wound on the half axle gear and the motor gear;
and the output right half shaft/output left half shaft of the differential is connected with the hydraulic motor B through a transmission mechanism B, and the transmission mechanism B has the same structure as the transmission mechanism A.
7. The dual-flow transmission based dual-motor synchronous hydraulic steering system according to claim 1, wherein the bidirectional variable pump is further communicated with a fluid infusion pump, the fluid infusion pump is communicated with a fuel tank through a fuel pipe, and a filter is arranged on the fuel pipe.
8. The dual-flow transmission based dual-motor synchronous hydraulic steering system of claim 7, wherein the bidirectional variable pump is further in communication with a heat sink fitting, a cleaning fitting, a reversing fitting, and a protection fitting.
9. A tracked vehicle comprising a body, an a-track, a B-track, and a dual flow transmission based dual motor synchronous hydraulic steering system of any of claims 1-8.
10. The tracked vehicle defined in claim 9, wherein the a track is disposed about the a track drive wheel and the B track is disposed about the B track drive wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120500093.XU CN214729101U (en) | 2021-03-09 | 2021-03-09 | Double-motor synchronous hydraulic steering system based on double-flow transmission and tracked vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120500093.XU CN214729101U (en) | 2021-03-09 | 2021-03-09 | Double-motor synchronous hydraulic steering system based on double-flow transmission and tracked vehicle |
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| Publication Number | Publication Date |
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| CN214729101U true CN214729101U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120500093.XU Active CN214729101U (en) | 2021-03-09 | 2021-03-09 | Double-motor synchronous hydraulic steering system based on double-flow transmission and tracked vehicle |
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| CN (1) | CN214729101U (en) |
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- 2021-03-09 CN CN202120500093.XU patent/CN214729101U/en active Active
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