Fuel chassis stable speed limiting mechanism

Abstract

The utility model relates to the technical field of airport ground equipment, in particular to a fuel chassis stable speed limiting mechanism which comprises a reduction gearbox, a gear shifting shaft, a transmission shaft connecting fork, an electro-hydraulic cylinder front fork, a pin shaft, a power unit, an electro-hydraulic cylinder, a direct gear switch and a speed reduction gear switch. The electric hydraulic cylinder is driven by the power unit to telescopically drive the gear shifting shaft to move front and back, the power unit completes position locking, the gear shifting shaft moves forwards or backwards in place, switching of a direct gear switch and a speed reduction gear switch is achieved, a direct gear switch signal or a speed reduction gear switch signal is triggered, and the switch signal is used for giving an in-place stop signal to the power unit. The electric hydraulic cylinder does not continue to act and keeps the position, a gear indication signal is displayed in the automobile, the limiting mechanism achieves the large speed reduction ratio on the basis of the original automobile speed, meanwhile, the low and stable automobile speed is achieved, and good smoothness and comfort are guaranteed in the final automobile aligning process.

Description

Technical Field

[0001] The utility model relates to the technical field of airport ground equipment, in particular to a fuel chassis stable speed limiting mechanism. Background Art

[0002] Now all airport docking equipment must be equipped with a safe docking system. Generally, the idle speed of fuel vehicles is above 3 km / h. To meet the civil aviation safety docking standard, the worm speed must be controlled within 0.8 km / h. In order to achieve a low and stable speed during the docking process, the industry mostly uses brake control.

[0003] However, the transmission of brake control involves different media and is affected by the vehicle's forward inertia, so it is difficult to control the vehicle speed by braking. There are many changing factors, and it is difficult to maintain consistent final effect. Frequent braking or strong braking force during the operation will have a great impact on driving smoothness and comfort, and the operator acceptance is low. Utility Model Content

[0004] The utility model aims to provide a fuel chassis stable speed limiting mechanism, aiming to solve the problem that in the existing safety engine-to-engine system, frequent braking or large braking force has a great impact on driving smoothness and comfort.

[0005] To achieve the above-mentioned purpose, the utility model provides a fuel chassis stable speed limiting mechanism, including a reduction gear box, a shift shaft, a transmission shaft connecting fork, an electro-hydraulic cylinder front fork, a pin shaft, a power unit, an electro-hydraulic cylinder, a direct gear switch and a downshift gear switch; the power unit is arranged on one side of the reduction gear box, the direct gear switch is arranged on one side of the reduction gear box, the downshift gear switch is arranged on the side of the reduction gear box away from the direct gear switch, the shift shaft is arranged on the side of the downshift gear switch away from the reduction gear box, the transmission shaft connecting fork is fixedly connected to the shift shaft and is located on the side away from the downshift gear switch, the electro-hydraulic cylinder front fork is arranged on the side of the transmission shaft connecting fork away from the shift shaft, the pin shaft is arranged on one side of the electro-hydraulic cylinder front fork, and the electric hydraulic cylinder is arranged on one side of the electric hydraulic cylinder front fork.

[0006] Wherein, the fuel chassis stable speed limiting mechanism also includes a shock-absorbing rubber block, and the shock-absorbing rubber block is arranged on one side of the reduction box.

[0007] Wherein, the fuel chassis stable speed limiting mechanism also includes a modified transmission shaft, and the modified transmission shaft is arranged on the side of the reduction box close to the downshift switch.

[0008] Wherein, the power unit has a valve function.

[0009] The action of the electro-hydraulic cylinder is to automatically enter the downshift gear when the safety system is activated, and automatically restore the direct gear when the system is shut down.

[0010] The utility model discloses a fuel chassis stable speed limiting mechanism. First, the transmission shaft of the original vehicle is removed, the overall structure of the reduction box is moved to the middle, the input flange of the reduction box is connected to the output flange of the gearbox bumper or the central parking brake hand brake disc of the original vehicle, and after the flange stop and the boss are coaxially aligned, the shock absorbing mechanisms on both sides of the reduction box are welded or bolted to both sides of the frame, and the output flange is connected to the modified transmission shaft. The speed ratio switching of the gearbox is realized by moving the shift shaft, and the shift shaft drives the shift fork to move to form different combinations of internal gears to realize the switching of the direct gear switch and the downshift gear switch;

[0011] The electric hydraulic cylinder is connected through the front fork of the electric hydraulic cylinder, the transmission shaft connecting fork, the pin shaft and the shift shaft. Under the drive of the power unit, the electric hydraulic cylinder telescopically drives the shift shaft to move forward and backward, and the position locking is completed by the valve function of the power unit. The shift shaft moves forward or backward to the position, realizes the switching of the direct gear switch and the downshift gear switch, and triggers the switch signal of the direct gear or the downshift gear. The function of the switch signal is to give the power unit an in-place stop signal, the electric hydraulic cylinder will no longer continue to move and maintain the position, and give a gear indication signal to the display screen in the vehicle. The action of the electric hydraulic cylinder is to automatically enter the downshift gear when the safety machine system is started, and the direct gear is automatically restored when the system is turned off, so that simple operation is achieved and quick start is achieved. The limit mechanism adopts the method of assisting the reduction gear box to reduce the speed, and does not change the operation method of the original vehicle. It can achieve a larger speed reduction ratio on the basis of the original vehicle speed, while achieving a relatively low and stable vehicle speed. In the final alignment process, the operator can concentrate on ensuring better smoothness and comfort, actively and effectively assist the alignment operation, and solve the problem of frequent braking or large braking force during the alignment process of the existing safe alignment system, which has a great impact on driving smoothness and comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0013] Figure 1 It is a structural schematic diagram of a fuel chassis stable speed limiting mechanism of the first embodiment of the utility model.

[0014] Figure 2 It is a structural schematic diagram of a reduction box shift drive assembly of a fuel chassis stable speed limiting mechanism according to the first embodiment of the utility model.

[0015] Figure 3 It is a reduction box arrangement diagram of a fuel chassis stable speed limiting mechanism according to the first embodiment of the utility model.

[0016] In the figure: 101-reduction gearbox, 102-shock-absorbing rubber block, 103-shift shaft, 104-modified transmission shaft, 105-transmission shaft connecting fork, 106-electric hydraulic cylinder front fork, 107-pin shaft, 108-power unit, 109-electric hydraulic cylinder, 110-direct gear switch, 111-speed reduction gear switch. DETAILED DESCRIPTION

[0017] The first embodiment of the present application is:

[0018] See also Figure 1-Figure 3 , Figure 1 It is a structural schematic diagram of the utility model. Figure 2 It is a structural schematic diagram of the gearbox shift drive assembly of the utility model. Figure 3 It is a layout diagram of the reduction gearbox of the utility model, including a reduction gearbox 101, a shock-absorbing rubber block 102, a shift shaft 103, a modified transmission shaft 104, a transmission shaft connecting fork 105, an electro-hydraulic cylinder front fork 106, a pin shaft 107, a power unit 108, an electro-hydraulic cylinder 109, a direct gear switch 110 and a downshift gear switch 111. The above-mentioned scheme solves the problem that frequent braking or large braking force has a great impact on driving smoothness and comfort during the existing safe docking system. It can be understood that the above-mentioned scheme can be used in the scenario of airport equipment docking.

[0019] According to the present specific embodiment, the power unit 108 is arranged on one side of the reduction box 101, the direct gear switch 110 is arranged on one side of the reduction box 101, the downshift gear switch 111 is arranged on the side of the reduction box 101 away from the direct gear switch 110, the shift shaft 103 is arranged on the side of the downshift gear switch 111 away from the reduction box 101, the transmission shaft connecting fork 105 is fixedly connected to the shift shaft 103 and is located on the side away from the downshift gear switch 111, the electric hydraulic cylinder front fork 106 is arranged on the side of the transmission shaft connecting fork 105 away from the shift shaft 103, and the pin shaft 107 is arranged on the side of the transmission shaft connecting fork 105 away from the shift shaft 103. On one side of the electric hydraulic cylinder front fork 106, first remove the transmission shaft of the original vehicle, move the overall structure of the reduction box 101 to the middle, connect the input flange of the reduction box 101 to the output flange of the transmission element of the original vehicle or the central parking brake hand brake disc, and after the flange stop and boss are coaxially aligned, the shock absorbing mechanisms on both sides of the reduction box 101 are welded or bolted to both sides of the frame, and the output flange is connected to the modified transmission shaft 104. The speed ratio switching of the transmission is realized by moving the shift shaft 103, and the shift shaft 103 drives the shift fork to move, forming different combinations of internal gears, so as to realize the switching of the direct gear switch 110 and the downshift gear switch 111;

[0020] The electric hydraulic cylinder 109 is connected to the shift shaft 103 through the electric hydraulic cylinder front fork 106, the transmission shaft connecting fork 105, the pin shaft 107, and the shift shaft 103. The electric hydraulic cylinder 109 is driven by the power unit 108 to telescopically drive the shift shaft 103 to move forward and backward, and the position locking is completed by the valve function of the power unit 108. The shift shaft 103 moves forward or backward to the position, realizes the switching of the direct gear switch 110 and the downshift gear switch 111, and triggers the switch signal of the direct gear or the downshift gear. The function of the switch signal is to give the power unit 108 an in-place stop signal, the electric hydraulic cylinder 109 no longer continues to move and maintains the position, and gives a gear indication signal to the in-vehicle display screen. The action of the electric hydraulic cylinder 109 is to automatically enter the downshift gear when the safety machine system is started, and the direct gear is automatically restored when the system is turned off, so that simple operation is achieved and quick operation is achieved. The limit mechanism adopts the method of assisting the reduction box 101 to reduce the speed, and does not change the operation method of the original vehicle. It can achieve a larger speed reduction ratio on the basis of the original vehicle speed, while achieving a relatively low and stable vehicle speed. In the final alignment process, the operator can concentrate on ensuring better smoothness and comfort, actively and effectively assist the alignment operation, and solve the problem of frequent braking or large braking force during the alignment process of the existing safe alignment system, which has a great impact on driving smoothness and comfort.

[0021] The shock-absorbing rubber block 102 is arranged at one side of the reduction gearbox 101 , and the shock-absorbing rubber block 102 is used to play a buffering and shock-absorbing role in the shock-absorbing mechanism of the gearbox.

[0022] Secondly, the modified transmission shaft 104 is arranged on the side of the reduction box 101 close to the downshift switch 111, and the modified transmission shaft 104 is used to transmit torque to the drive axle.

[0023] When switching between the direct gear and the downshift gear, the electro-hydraulic cylinder 109, driven by the power unit 108, telescopes and drives the shift shaft 103 to move forward and backward, and the position locking is completed by the valve function of the power unit 108. The shift shaft 103 moves forward or backward into position, thereby realizing the switching of the direct gear switch 110 and the downshift gear switch 111.

[0024] What is disclosed above is only a preferred embodiment of a fuel chassis stable speed limiting mechanism of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A fuel chassis stable speed limiting mechanism, characterized in that: It includes a reduction gear box, a shift shaft, a transmission shaft connecting fork, an electro-hydraulic cylinder front fork, a pin shaft, a power unit, an electro-hydraulic cylinder, a direct gear switch and a downshift gear switch; The power unit is arranged on one side of the reduction gear box, the direct gear switch is arranged on one side of the reduction gear box, the downshift gear switch is arranged on the side of the reduction gear box away from the direct gear switch, the shift shaft is arranged on the side of the downshift gear switch away from the reduction gear box, the transmission shaft connecting fork is fixedly connected to the shift shaft and is located on the side away from the downshift gear switch, the electric hydraulic cylinder front fork is arranged on the side of the transmission shaft connecting fork away from the shift shaft, the pin shaft is arranged on one side of the electric hydraulic cylinder front fork, and the electric hydraulic cylinder is arranged on one side of the electric hydraulic cylinder front fork.

2. A fuel chassis stable speed limiting mechanism as claimed in claim 1, characterized in that: The fuel chassis stable speed limiting mechanism also includes a shock-absorbing rubber block, and the shock-absorbing rubber block is arranged on one side of the reduction box.

3. A fuel chassis stable speed limiting mechanism as claimed in claim 2, characterized in that: The fuel chassis stable speed limiting mechanism also includes a modified transmission shaft, and the modified transmission shaft is arranged on a side of the reduction box close to the downshift switch.

4. A fuel chassis stable speed limiting mechanism as claimed in claim 3, characterized in that: The power unit has a valve function.

5. A fuel chassis stable speed limiting mechanism as claimed in claim 4, characterized in that: The action of the electric hydraulic cylinder is that the safety machine system is activated and automatically enters the downshift gear, and the system is closed and automatically restored to the direct gear.

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