CN213390320U - Pedal clutch protection device of mechanical bulldozer gearbox - Google Patents

Abstract

A kind of machinery bulldozer gear box pedal clutch protective device, relate to the clutch protection technical field, solve the inconvenient problem of operation of shifting gears, including pedal clutch pedal, photoelectric switch, control module, engine ECU, hand throttle, foot throttle and CAN bus, the said photoelectric switch has locking devices, the photoelectric switch is connected with pedal clutch pedal through the locking device, the photoelectric switch detects the degree of stepping on the pedal clutch pedal, the input end of the said control module is connected with signal output end of the photoelectric switch electrically, the said engine ECU communicates with control module through CAN bus, the said hand throttle, foot throttle are connected with engine ECU electricity separately; the working life of the speed changing clutch is prolonged, the mechanical bulldozer further reduces the driving fatigue of operators in the gear shifting operation process in the up-down slope process, the operation is convenient, the gear shifting comfort is high, and the safety of the gearbox clutch is protected.

Description

Pedal clutch protection device of mechanical bulldozer gearbox

Technical Field

The utility model relates to a machinery bull-dozer especially relates to a machinery bull-dozer gearbox pedal clutch protection device.

Background

The mechanical bulldozer is a bulldozer without a hydraulic torque converter, an engine power device is directly connected with a gearbox, the oil consumption of equipment is low, the operation is complex, the value is high, main operators continuously and manually coordinate and operate a control rod piece and a pedal to complete the gear shifting action of the bulldozer, and the mechanical bulldozer has the characteristics of high working efficiency, low oil consumption, high requirement on driving skill and the like.

At present, as people are concerned about the oil consumption of engineering machinery more and more, the mechanical gear bulldozer is widely applied under specific application working conditions and is mainly applied to working condition construction such as mud cleaning and road building, the clutches on the market at present are mostly manually operated clutches, and part of the clutches are left foot-operated clutches, because the left hand side of the mechanical bulldozer is provided with a hand accelerator, a forward/backward operation rod, a gear shift rod and a hand clutch rod, the right hand part is provided with an 1/2/3 gear shift rod, the middle part of the foot is provided with a brake pedal, the right side pedal is a deceleration foot accelerator pedal, and the clutch pedal of a foot-operated clutch vehicle is arranged at the left foot position, so that more rod pieces and pedals need to be operated by an operator, and the handle operation of a right hand operation system is also considered, therefore, the requirements on the driving skill of the operator are high, particularly during the operation of the mechanical foot clutch vehicle for shifting and reversing on a slope, after the left hand of an operator sets the hand throttle to the maximum rotating speed, the rotating speed of the engine is controlled by the right foot deceleration pedal, when the gear shifting operation is carried out, the left foot depresses a clutch pedal, after the left hand finishes the F/R reversing operation, when the right hand finishes the gear shifting operation, the right foot performs the deceleration operation, when the braking operation is needed, the rotating speed of the engine can immediately return to the highest rotating speed after the right foot of an operator leaves the accelerator pedal of the deceleration foot, therefore, large gear shifting impact is caused, when the bulldozer switches gears, the engine running at high speed easily causes the speed change clutch to be subjected to strong impact, the working condition of a friction plate in the speed change clutch is relatively bad in the gear shifting beat, the abrasion degree is large, and the working life of the speed change clutch in the existing bulldozer is short. As the bulldozer is used as reciprocating mechanical equipment, the working time is long, driving fatigue of operators is easily caused, the friction plate of the clutch of the bulldozer during driving or working is easily abraded seriously, and the service life of the transmission is greatly reduced. Therefore, how to make operating personnel convenient operation through effectively setting up a pedal clutch protection device, the travelling comfort of shifting is high, reaches protection gearbox clutch safety simultaneously, has become the problem of first solving.

Disclosure of Invention

In order to solve the problem, the utility model provides a pedal clutch protection device of machinery bull-dozer gearbox provides the pedal clutch protection device that the operation of shifting is more convenient. In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a machinery bull-dozer gearbox pedal clutch protection device, includes pedal clutch pedal, photoelectric switch, control module, engine ECU, hand throttle, foot throttle and CAN bus, photoelectric switch be provided with locking device, photoelectric switch is connected with pedal clutch pedal through locking device, photoelectric switch detects the degree of stepping on of pedal clutch pedal, control module's input be connected with photoelectric switch's signal output part electricity, engine ECU pass through the CAN bus and be connected with the control module communication, hand throttle, foot throttle be connected with engine ECU electricity respectively.

The hand throttle is a knob adjusting mechanism, and the gear setting knob can keep the current state after being screwed to a proper position, namely, the hand throttle can adjust the rotating speed of the engine to a certain rotating speed state corresponding to a certain position in an idle speed-maximum rotating speed interval.

The foot accelerator is a pedal with a spring reset structure, when the hand accelerator sets the current engine speed, the foot accelerator is trampled to reduce the engine speed from the current state to the idle state, and after the foot accelerator is loosened, the engine speed is restored from the idle state to the current set speed state of the hand accelerator.

Furthermore, the photoelectric switch is a PNP type non-contact switch, the induction distance is 2-5MM, the model of the photoelectric switch is DW-DD-625, the pedal of the pedal clutch can be accurately judged to enable the clutch to be in a separation state and a combination state, meanwhile, a state indicating lamp is arranged on the surface of the photoelectric switch, the switch can be intuitively prompted to be in a closed state or an open state, and an operator can be intuitively prompted to the state of the switch at present. And the method is favorable for judging the state and the fault.

Furthermore, the model of the control module is set to be EPEC-3610, the control module can detect the state of the photoelectric switch, and sends an engine bus throttle instruction according to the state to adjust or recover to a set rotating speed according to a pre-stored descending or ascending curve, and the slope of the ascending and descending curve can be set according to the operation habits of customers and different power sections of the mechanical bulldozer.

The control principle is as follows: when the pedal clutch pedal is not trodden, the photoelectric switch can not detect that the pedal clutch pedal is in a trodden position, namely, the clutch is in a combined state, and the photoelectric switch is in a disconnected state at the moment. The engine speed is directly acted on an engine ECU by electric signals of a hand throttle and a foot throttle, and the engine ECU finally adjusts the engine speed according to a preset control logic;

when a pedal clutch pedal is stepped down, the photoelectric switch is in a closed connection state, the control module detects the state of the photoelectric switch, the control module sends a prestored throttle command of an engine bus through a CAN bus, and the rotating speed of the engine regulated by the actions of the throttle and the foot throttle is quickly regulated to an idle speed from the current state according to a prestored rapid descending curve, so that the separation and combination of a clutch of a gearbox are completed in a low rotating speed state, the gear shifting flexibility is good at low speed, and the impact is small; after the gear shifting action is finished, the pedal clutch pedal is released, after the input end of the control module detects the disconnection action of the photoelectric switch, the control module stops sending a prestored throttle command of an engine bus through the CAN bus, so that the rotating speed of the engine is rapidly adjusted to the current rotating speed from the current idle speed state according to a prestored rapid rising curve, and the rapid power recovery is facilitated.

Compared with the prior art, the utility model discloses following beneficial effect has: the current rotating speed of the engine is changed, and the rotating speed of the engine is subjected to speed reduction processing during high-speed gear shifting, so that the impact of gear switching action at a high rotating speed on the speed change clutch is reduced, the relative rotating speed of friction plates of the speed change clutch is reduced, the abrasion to the friction plates is reduced, and the service life of the speed change clutch is prolonged. Particularly, when the mechanical bulldozer finishes the gear shifting operation process in the processes of ascending and descending, the driving fatigue of operators is further reduced, the operation is convenient, the gear shifting comfort is high, and the safety of a clutch of a gearbox is protected; the automatic clutch protection device can fill and improve the defect of clutch protection control of the mechanical bulldozer, improves the operation efficiency and the comfort, has simple overall structure arrangement, convenient control, stable performance and high safety factor, and can be widely applied to various mechanical bulldozers.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of the present invention;

in the drawings: 1. the system comprises a pedal clutch pedal, 2, a photoelectric switch, 3, a control module, 4, an engine ECU, 5, a hand accelerator, 6, a foot accelerator, 7 and a CAN bus.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described with reference to fig. 1 and the specific embodiments.

As shown in the attached drawing 1, the pedal clutch protection device for the gearbox of the mechanical bulldozer comprises a pedal clutch pedal 1, a photoelectric switch 2, a control module 3, an engine ECU4, a hand throttle 5, a foot throttle 6 and a CAN bus 7, wherein the photoelectric switch 2 is provided with a locking device, the photoelectric switch 2 is connected with the pedal clutch pedal 1 through the locking device, the input end of the control module 3 is electrically connected with the signal output end of the photoelectric switch 2, the engine ECU4 is in communication connection with the control module 3 through the CAN bus 7, and the hand throttle 5 and the foot throttle 6 are respectively and electrically connected with the engine ECU 4.

The utility model discloses a theory of operation and working process as follows: when the pedal clutch pedal 1 is not stepped on, the photoelectric switch 2 cannot detect that the pedal clutch pedal 1 is in a stepping position, namely, the clutch is in a combined state, and at the moment, the photoelectric switch 2 is in a disconnected state. The engine speed 5 is directly acted on the engine ECU4 by the electric signals of the hand throttle and the foot throttle 6, and the engine ECU4 finally adjusts the engine speed according to the preset control logic.

Similarly, when the pedal clutch pedal 1 is stepped on, the photoelectric switch 2 detects that the pedal clutch pedal 1 is in a stepping position, that is, the clutch is in a separation state, and at the moment, the photoelectric switch 2 is in a closed connection state. Because the signal of the photoelectric switch 2 is electrically connected with the input end of the control module 3, when the control module 3 detects the closing action of the photoelectric switch 2, the control module 3 sends a prestored idling instruction of an engine bus accelerator through the CAN bus 7, and the engine speed regulated by the actions of the hand accelerator 5 and the foot accelerator 6 is rapidly regulated to an idling speed from the current state according to a prestored rapid descending curve, so that the separation and combination of a clutch of a gearbox are completed in a low-speed state, the gear shifting action is completed, the gear shifting flexibility at the low speed is good, and the impact is small.

After the gear shifting action is finished, the pedal clutch pedal 1 is released, after the input end of the control module 3 detects the disconnection action of the photoelectric switch 2, the control module 3 stops sending a prestored throttle command of an engine bus through the CAN bus 7, so that the rotating speed of the engine is rapidly adjusted to the current rotating speed from the current idle speed state according to a prestored rapid rising curve, and the rapid power recovery is facilitated.

For example, when the mechanical bulldozer is in an uphill state and is loaded to perform reversing and downshifting operation, the hand throttle 5 is adjusted to a maximum rotating speed state, the right foot is used for stepping on the foot throttle 6 to reduce the rotating speed, if the brake is needed to be stepped on, the right foot of an operator is moved to the brake pedal from the foot throttle pedal to perform braking operation, if the gear shifting is needed at this time, after the left foot of the operator is used for stepping on the clutch pedal 1, the clutch state is changed from the combination state to the separation state, the photoelectric switch 2 senses that the clutch is separated, the control module 3 sends an engine bus throttle command through the CAN bus 7, the rotating speed of the engine is rapidly reduced from the current rotating speed to the idle speed, at this time, the right hand of the operator operates the gear shifting lever to complete F1 switching to F2, the left hand operating lever to complete F switching to R, during this process, the right foot of the operator only needs to pay attention to, after the left foot of an operator releases the pedal clutch pedal 1, the photoelectric switch 2 is disconnected, the control module 3 stops sending an engine bus throttle signal, the throttle signal finishes the recovery of a rotating speed instruction according to a preset slow slope, the operator only needs to coordinate each action in the process, the flexible gear shifting can be realized, the gear shifting impact of the clutch is small, the service life of the clutch is further prolonged, and the comfortable gear shifting operation is high.

Utilize technical scheme, or technical personnel in the field are in the utility model discloses under technical scheme's the inspiration, design similar technical scheme, and reach above-mentioned technological effect, all fall into the utility model discloses a protection scope.

Claims (3)

1. The utility model provides a machinery bull-dozer gearbox pedal clutch protection device, includes pedal clutch pedal, photoelectric switch, control module, engine ECU, hand throttle, foot throttle and CAN bus, characterized by photoelectric switch be provided with locking device, photoelectric switch is connected with pedal clutch pedal through locking device, control module's input be connected with photoelectric switch's signal output part electricity, engine ECU pass through the CAN bus and be connected with the control module communication, hand throttle, foot throttle be connected with engine ECU electricity respectively.

2. The pedal clutch protection device for the transmission case of the mechanical bulldozer according to claim 1, wherein the photoelectric switch is a PNP-type non-contact switch, the sensing distance is 2-5MM, and the type of the photoelectric switch is DW-DD-625.

3. The pedal clutch protection device for a bulldozer gearbox according to claim 1, wherein the control module is of the type EPEC-3610.

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