44results about How to "Realize the interlock function" patented technology

The invention discloses a hydraulic control system for a folding arm-type overhead working truck. The hydraulic control system for the folding arm-type overhead working truck comprises a pump group, an upper truck control multi-way valve, a lower truck control multi-way valve and a bypass throttle valve group; the lower truck control multi-way valve comprises a two-position three-way valve, a liquid-controlled overflow valve and a supporting leg control valve; a pilot oil way of the liquid-controlled overflow valve is communicated with the upper truck control multi-way valve; the supporting leg control valve distributes hydraulic power which is provided by the pump group to different lower truck actuating components. The hydraulic control system for the folding arm-type overhead working truck has the beneficial effects that: 1, the overall system is divided into two parts, i.e., an upper truck control system and a lower truck control system through a two-position three-way reversing valve, so that the lower truck control system and the upper truck control system realize an interlocking function, when an upper truck works, a lower truck cannot work, and when the lower truck works, the upper truck cannot work either; 2, a bypass throttle valve is arranged at each of a turntable and a working platform by utilizing a bypass throttling control mode, so that a worker can control the speed of an upper truck system conveniently when the turntable and the working platform operate, and the control cost of the system is reduced.

The invention provides a transmission double-lever control device assembly. A transverse gear shifting lever is provided with a switch control block, a self-locking control block and a gear shifting block, the switch control block, the self-locking control block and the gear shifting block rotate synchronously with the transverse gear shifting lever, and a shell is provided with a self-locking assembly and a reverse gear lock assembly. A groove is formed in the self-locking control block in the circumferential direction, and when the self-locking assembly is located in the groove, neutral gearpositioning is carried out on the gear shifting block. The circumferential surface of the gear shifting block is provided with a protrusion, the gear shifting block slides horizontally, and when gearshifting forth increases and the reverse gear lock assembly reaches the top of the protrusion, a reverse gear position is selected into. According to the transmission double-lever control device assembly, self-locking and reverse gear locks are arranged on the control assembly, all the gears share the self-locking assembly, the consistency of gear shifting force is guaranteed, meanwhile the gearshifting force can be debugged without disassembling a gearbox, the number of parts is reduced, the cost is reduced, and the transmission double-lever control device assembly has high use value and promotion value.

The invention relates to an interlocking type gear shifting mechanism applied to a gear box. Output rotary speed conversion and forward and backward rotations (four gears of different forward rotary speed outputs and backward rotary speed outputs) of a drilling machine are controlled by the same pulling rod; a positioning steel ball and an interlocking steel ball commonly press and firmly lock a gear in a conversion process and an inter-gear interlocking function is realized, so that the gear shifting is safe and reliable and gears are not disordered, and the inter-gear interlocking function is simply and reliably realized in a gear shifting process; and compared with the existing gear shifting mechanism lacking of the interlocking function, the interlocking type gear shifting mechanism has the advantages of simple and compact structure, easiness in operation, and safety and reliability, and is suitable for being popularized and applied on similar gear boxes.

The invention relates to the field of engineering machinery, and discloses a boarding power take-off control system, a method and engineering machinery. The boarding power take-off control system comprises a boarding power take-off device, a transfer case gear shifting air cylinder and an electromagnetic valve set. The boarding power takeoff and the transfer case gear shifting air cylinder each comprise a neutral gear and a power take-off gear, and the electromagnetic valve set controls the ventilation state of the boarding power takeoff and the transfer case gear shifting air cylinder so thatthe neutral gear of one of the boarding power takeoff and the transfer case gear shifting air cylinder can be locked with the power take-off gear of the other of the boarding power takeoff and the transfer case gear shifting air cylinder. When one of the transfer case gear shifting air cylinder and the boarding power takeoff is in a neutral position state, the other one can enter a non-neutral-position working state. When the power take-off operation is carried out, the chassis transmission system cannot output power; when the chassis transmission system outputs driving power, the boarding cannot take off the power; and the problem of insufficient power caused by extra power consumption is solved.

The invention discloses an electric gear selecting and shifting executing mechanism. The mechanism comprises a gear selecting mechanism, a gear engaging mechanism, a self-locking mechanism, an interlocking mechanism, a transmission shaft and a shell; the gear selecting mechanism is arranged at one end of the shell; the gear engaging mechanism is arranged at the other end of the shell; the output end of the gear selecting mechanism is connected with a transmission body; the output end of the gear selecting mechanism is connected with the output end of the gear selecting mechanism through the transmission shaft; the self-locking mechanism is connected with the output end of the gear selecting mechanism and is used for preventing a transmission from undergoing spontaneous out-of-gear; and theinterlocking mechanism is connected with the output end of the gear selecting mechanism and is used for preventing the transmission from being engaged with multiple gears at the same time. Accordingto the electric gear selecting and shifting executing mechanism of the invention, the self-locking mechanism is adopted, so that the locking of a certain gear of the transmission is achieved, and therefore, the automatic gear jumping of the transmission caused by vibration in the running process of a vehicle is prevented; and the interlocking mechanism is adopted, so that the transmission can be prevented from being engaged with multiple gears at the same time, and therefore, damage to the transmission caused by such a condition is effectively avoided. The mechanism is simple in structure andcan assist inn decreasing the fault points of the transmission and improving the reliability of the vehicle.

The invention discloses a wave-by-wave current limiting device for a inverter. When the inverter load is increased, the output power of the whole inverter increases, which inevitably leads to an increase in the load current. In order to avoid over-current of the main power circuit component switch tube, it is necessary to set a current threshold value in each switching cycle, so that the switch tube can be turned off when the switch tube current exceeds the threshold value, the current does not continue to rise to protect the switch tube. The wave-by-wave current limiting device for inverter can collect the load output current through a current limiting comparison unit and compare with the set value, and then perform a certain adjustment on the PWM waveform outputted by a chip through a wave-by-wave current limiting unit, and then output the signal to a power tube driving unit, thereby realizing current limiting during each switching cycle. Meanwhile, when the PWM waveform outputted bythe chip is wrong, the interlocking function can also be realized to prevent the DC power supply from being short-circuited due to the simultaneous conduction of the two switch tubes of the same bridge arm.

The invention relates to a shift control mechanism of a transmission. The shift control mechanism comprises a first shift lever, a second shift lever, a third shift lever and a fourth shift lever, wherein a first shift fork and a first shift drive fork are matched on the upper portion of the first shift lever, a second shift fork and a second shift drive fork are matched on the lower portion of the second shift lever, the lower portions of the third shift lever and the fourth shift lever are matched with a third shift drive fork respectively, and a third shift fork is matched on the upper portion of the fourth shift lever. The shift control mechanism is characterized in that a shift block is composed of a shift finger and a shift cam, a mounting hole is arranged at the center of the shift cam, a shift shaft is perpendicular to the fourth shift lever and matched with the mounting hole on the shift cam, and the shift finger is positioned between inner sides of the first shift fork, the second shift fork and the third shift fork. The shift control mechanism is simple in structure, and capable of achieving shift interlocking and gear selection before dislocating, reducing shift time, and improving safety and service efficiency of the transmission.

The invention discloses an interlocking device of a modular bus type electromagnetic valve group. The modular bus type electromagnetic valve group comprises a bus coupler, an electromagnetic valve seat and a plurality of electromagnetic valves integrated on the electromagnetic valve seat. The interlocking device comprises an input interface, an output interface and a controller, wherein the input interface is connected with the bus coupler, and is used for receiving an electromagnetic valve control instruction transmitted by the bus coupler; the output interface is connected with the plurality of electromagnetic valves through the electromagnetic valve seat; and the controller is used for determining a target electromagnetic valve from the plurality of electromagnetic valves according to the electromagnetic valve control instruction, and interlocking the target electromagnetic valve. According to the interlocking device, an individual target electromagnetic valve can be interlocked according to the practical requirement, the interlock function of an assigned electromagnetic valve is achieved, and different technological requirements can be met. The invention further discloses the modular bus type electromagnetic valve group.

The invention relates to an automobile speed change control mechanism. The automobile speed change control mechanism comprises an operation base and a control rod, wherein a gear limiting disc is arranged inside the operation base; a reverse gear groove and a plurality of forward gear grooves are formed in the gear limiting disc, the forward gear grooves communicates with one another through a horizontally-arranged forward guide groove, and a horizontally-arranged reverse gear guide groove is formed in the reverse gear groove; the control rod is inserted into the forward guide groove, and a guide block is arranged at the bottom of the control rod and comprises an upper guide block, a lower guide block, a telescopic rod and a compression spring; and when the compression spring is in a balanced state, the forward guide groove is matched with the guide block in a balanced state, when the compression spring is in a compressed state, the reverse gear guide groove is matched with the guide block in a compressed state, and the reverse gear guide groove is connected with the forward guide groove through a limiting groove. When the control rod is engaged into a reverse gear, the control rod needs to be compressed downwards until the telescopic rod is shortest, the guide block moves into the reverse gear groove after entering the reverse gear guide groove, and the control rod is prevented from being engaged into the reverse gear groove due to misoperation when located in the forward guide groove.

The invention belongs to a flying automatic control technology, and relates to a forward and reverse thrusting interlocking mechanism. The forward and reverse thrusting interlocking mechanism is usedin an accelerator control console of an airborne power device system, and can also be used in other electromechanical products. The forward and reverse thrusting interlocking mechanism comprises a reverse thrusting rod (1), a forward thrusting rod (2), a middle baffle (3) and a pin shaft (5). The forward and reverse thrusting interlocking mechanism integrates the forward thrusting rod and the reverse thrusting rod, the structure is compact, and relatively independent movement is realized while the interlocking function is achieved, without occupying excessive space; the middle baffle is designed, so that the function of physical isolation from other channels is realized while the forward and reverse thrusting interlocking function is achieved, and the weight reduction design of the productis realized under a certain condition; and the forward and reverse thrusting interlocking function is realized through mechanical parts, the structure is simple and reliable, and the safety is high.

The invention discloses a transmission control mechanism and a vehicle with the transmission control mechanism. The transmission control mechanism comprises a shell, a plurality of shift fork shafts and a self-locking part. The shift fork shafts are parallel to one another and arranged in the shell at intervals. Each shift fork shaft can move in the axial direction of the shift fork shaft and is provided with a plurality of groove structures which at least include a neutral gear groove and two gear-engaged grooves, and the two gear-engaged grooves are located in the two sides of the corresponding neutral gear groove. The self-locking part is arranged to be suitable for being simultaneously matched with one groove structure on each shift fork shaft, and conducts axial limiting on the shift fork shafts. The transmission control mechanism can simultaneously conduct self-locking on the shift fork shafts through one self-locking part, parts are less, and cost is low.