Gearbox refueling control structure

Abstract

The utility model discloses a gearbox refueling control structure which comprises a first normally-open relay, a normally-closed relay, a refueling pump and a second normally-open relay. The input end of the normally-closed relay is further connected with a turbine control selection relay, and the turbine control selection relay controls the normally-closed relay to be disconnected according to the turbine state and the liquid level state, so that the refueling pump stops working, and refueling is completed. The actual state of the whole vehicle is fed back through a signal of a turbine rotating speed sensor of a gearbox, direct transmission or delayed transmission is carried out on a refueling stopping signal, when the turbine rotating speed sensor has no signal, a liquid level meter signal passes through a delayed power-on device, excessive refueling operation of the whole vehicle in the flameout state is achieved, and when the turbine rotating speed sensor has the signal, the liquid level meter signal passes through the delayed power-on device. When the transmission oil is filled, a liquid level meter signal can be directly transmitted to the relay, the oil level is accurately controlled, the oil filling amount cannot be determined only according to the liquid level meter signal, and accurate oil filling of the transmission oil is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical equipment, and particularly relates to a gearbox refueling control structure. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Construction machinery transmission fluid plays multiple roles within the transmission system, including torque transmission, cooling and lubrication, and gear control. The amount of transmission fluid significantly impacts the transmission. Excessive fluid can cause overheating due to churning losses within the internal gears. This can also affect the oil's cooling effect on the internal gears and bearings, leading to lubrication failure and excessive wear on mechanical parts. Too little fluid can lead to insufficient internal lubrication, incomplete lubrication film on component surfaces, and component sintering. Furthermore, insufficient fluid can cause insufficient torque converter pressure, resulting in low torque transmission and ultimately insufficient overall machine power.

[0004] The transmission oil level varies significantly between when the engine is turned off and when it's started. This is because the torque converter operates while the transmission cools and filters when the engine is idling. These actions can cause the transmission oil level to drop. Currently, transmission oil refilling is primarily performed during maintenance, during which the engine is turned off. Refilling according to the marked oil level presents the risk of underfilling. To address this issue, secondary refilling and overfilling are often implemented during maintenance. Secondary refilling involves initially adding a small amount of transmission oil to meet the basic requirements for starting the engine, followed by additional oil at engine idle. Overfilling involves filling the transmission oil above the level mark, then refilling or draining the oil based on the idle level mark after the engine is started.

[0005] The inventors have discovered that the above solution has problems such as the refueling amount is not accurate enough, and there is a problem of over-refueling or under-refueling. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies in the above-mentioned prior art and to provide a transmission refueling control structure, a transmission refueling control structure, which feeds back the actual vehicle status through the transmission turbine speed sensor signal, directly transmits or delays the refueling stop signal, controls the refueling pump to delay the stop, and does not determine the refueling amount solely based on the liquid level meter signal, thereby achieving accurate refueling of the transmission oil.

[0007] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0008] The technical solution of the present utility model provides a transmission refueling control structure, comprising: a first normally open relay, which is connected to a normally closed relay and a refueling pump in sequence to control the action of the refueling pump; the input end of the normally closed relay is also connected to a turbine control selection relay, and the turbine control selection relay controls the normally closed relay to open a circuit according to the turbine state and the liquid level state, so that the refueling pump stops working and refueling is completed.

[0009] In at least one embodiment, the first normally open relay is connected to the normally closed relay and the refueling pump in sequence to control the action of the refueling pump as follows: the input end of the coil of the first normally open relay is connected to a refueling switch, the contact output end is connected to the contact input end of the normally closed relay, and the contact output end of the normally closed relay is connected to the refueling pump.

[0010] In at least one embodiment, the coil input terminal of the normally closed relay is connected to the contact output terminal of the turbine control selection relay, and the coil input terminal of the normally closed relay is grounded.

[0011] In at least one embodiment, the turbine state is collected by a turbine sensor and a turbine sensor signal is output; the liquid level state is collected by a liquid level gauge in the gearbox and a liquid level gauge signal is output.

[0012] In at least one embodiment, the liquid level meter is connected to the turbine control selection relay contact input terminal; the normally closed contact output terminal is connected to the power-on delay time relay and then connected to the normally closed relay coil input terminal; the normally open contact output terminal is directly connected to the normally closed relay coil input terminal.

[0013] In at least one embodiment, the turbine control selection relay coil input end is provided with an AND gate circuit, the two input ends of the AND gate circuit are respectively connected to the liquid level meter and the turbine sensor, and the output end is connected to the turbine control selection relay coil input end.

[0014] In at least one embodiment, the turbine control selection relay is further connected to a second normally open relay to control the action of the second normally open relay;

[0015] The coil input end of the second normally open relay is connected to the contact output end of the turbine control selection relay; the coil terminal of the second normally open relay is connected to the display instrument.

[0016] The technical solution of the present utility model also provides another transmission refueling control structure, wherein the turbine control selection relay is arranged between the normally closed relay and the refueling pump, the contact output end of the normally closed relay is connected to the contact input end of the turbine control selection relay, and the contact output end of the turbine control selection relay is connected to the refueling pump.

[0017] In at least one embodiment, the contact output end of the turbine control selection relay is connected to the refueling pump as follows: the normally closed contact output end is connected to the power-on delay time relay and then connected to the refueling pump; the normally open contact output end is directly connected to the refueling pump.

[0018] In at least one embodiment, the coil input end of the normally closed relay is connected to a liquid level meter; the liquid level meter is also connected to the coil input end of a second normally open relay.

[0019] The beneficial effects of the technical solution of the above utility model are as follows:

[0020] A transmission refueling control structure of the utility model feeds back the actual vehicle status through the transmission turbine speed sensor signal, directly transmits or delays the refueling stop signal, and when there is no signal from the turbine speed sensor, the liquid level gauge signal will pass through a delayed power-on device to realize over-refueling operation of the whole machine when the engine is turned off. When there is a signal from the turbine speed sensor, the liquid level gauge signal will be directly transmitted to the relay to realize precise control of the oil level. The refueling amount will not be determined solely based on the liquid level gauge signal, thereby realizing precise filling of the transmission oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] Figure 1 This is a schematic diagram of a gearbox refueling control structure of the utility model;

[0023] Figure 2 This is another structural schematic diagram of a gearbox refueling control structure of the utility model.

[0024] In the figure, 1. First normally open relay; 2. Normally closed relay; 3. Turbine control selection relay; 4. Second normally open relay; 5. Refueling switch; 6. Refueling pump; 7. Liquid level gauge; 8. Power-on delay time relay; 9. Turbine speed sensor; 10. Display instrument.

[0025] In order to show the positions of various parts, the distances or sizes between them are exaggerated. The schematic diagram is for reference only. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0027] As introduced in the background technology, the purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a transmission refueling control structure, which uses the transmission turbine speed sensor signal to feedback the actual vehicle status, directly transmits or delays the refueling stop signal, controls the delayed stop of the refueling pump, and does not solely determine the refueling amount based on the liquid level meter signal, thereby achieving accurate refueling of the transmission oil.

[0028] Example 1

[0029] In a typical embodiment of the present invention, Figure 1 As shown, this embodiment discloses a transmission refueling control structure, including: a first normally open relay 1, which is connected to a normally closed relay 2 and a refueling pump 6 in sequence to control the operation of the refueling pump 6; the input end of the normally closed relay 2 is also connected to a turbine control selection relay 3, and the turbine control selection relay 3 controls the normally closed relay 2 to open the circuit according to the turbine state and the liquid level state, so that the refueling pump 6 stops working and completes refueling.

[0030] The first normally-open relay 1 is connected to the normally-closed relay 2 and the refueling pump 6 in sequence to control the operation of the refueling pump 6. Specifically, the coil input of the first normally-open relay 1 is connected to a refueling switch 5, the contact output is connected to the contact input of the normally-closed relay 2, and the contact output of the normally-closed relay 2 is connected to the refueling pump 6. During refueling, the refueling switch 5 closes, driving the first normally-open relay 1 to close and conduct, allowing current to flow through the normally-closed relay 2 to drive the refueling pump 6 to fill the transmission.

[0031] The coil input end of the normally closed relay 2 is connected to the turbine control selection relay 3, and the coil input end of the normally closed relay 2 is grounded. The output signal of the turbine control selection relay 3 controls the conduction of the coil of the normally closed relay 2, and the control contact is disconnected, so that the action circuit of the refueling pump 6 is disconnected, the gearbox refueling action is stopped, and the refueling is completed.

[0032] Turbine status includes start and stop. Turbine speed sensor 9 collects and outputs a signal from turbine speed sensor 9, which is used to determine whether engine power is input. Liquid level status includes reaching the set level and not reaching the set level. Liquid level gauge 7, located within the gearbox, collects and outputs a signal from liquid level gauge 7, which is used to determine whether the oil level within the gearbox has reached the set level. Turbine control selector relay 3 is a selector relay driven by the turbine speed sensor signal and the liquid level gauge signal. Its contact input is connected to liquid level gauge 7, and its two contact outputs are a normally closed contact output and a normally open contact input. The normally open contact output is directly connected to the coil input of normally closed relay 2, while the normally closed contact output is connected to a time relay and then to the coil input of normally closed relay 2. The time relay selector 8 is a power-on delay time relay. An AND gate circuit is set at the coil input end of the turbine control selection relay 3. The two input ends of the AND gate circuit are respectively connected to the liquid level meter and the turbine sensor, and the output end is connected to the turbine control selection relay coil input end. When the turbine sensor signal and the liquid level meter signal exist at the same time, the contact switch of the turbine control selection relay 3 is switched from the normally closed contact to the normally open contact.

[0033] During the refueling pump 6's transmission refueling process, the liquid level gauge 7 generates a signal change. Once the oil reaches a predetermined level, the liquid level gauge 7 provides feedback. This signal is affected by the turbine speed. When there's no turbine speed sensor signal, the engine is shut down. In this state, the transmission oil is stagnant, requiring overfilling. Therefore, the liquid level gauge signal is passed through a time-delayed energizing device to facilitate overfilling while the engine is off. When the turbine speed sensor signals in, the engine is started, and the transmission oil is circulating. The oil level in this state can be used as the normal operating level for the transmission. Therefore, meeting the oil level gauge's requirements in this state is considered sufficient for refueling under normal operation. Therefore, an AND gate circuit is provided at the coil input of the turbine control selector relay 3. When both the turbine sensor signal and the liquid level gauge signal are present, the control contact switch switches from normally closed to normally open, transmitting the liquid level gauge signal directly through the normally open contact circuit to the normally closed relay 2, disconnecting the refueling pump 6's operating circuit, stopping the transmission refueling operation, and completing refueling. Through this refueling control structure, over-refueling can be achieved when the engine is stopped, and accurate refueling can be performed according to the idle oil level mark after the engine is started, thereby accurately controlling the oil level, ensuring the accuracy of the refueling amount, and avoiding the problems of over-refueling or under-refueling.

[0034] Turbine control select relay 3 is also connected to second normally open relay 4 to control the operation of second normally open relay 4. Specifically, the coil input end of second normally open relay 4 is connected to the contact output end of turbine control select relay 3, and the coil terminal of second normally open relay 4 is connected to display meter 10, which feeds back the refueling completion signal.

[0035] Example 2

[0036] In the solution of embodiment 1, the precise control of the refueling amount is achieved by adjusting the refueling signal fed back by the liquid level meter 7. This embodiment discloses another transmission refueling control structure, such as Figure 2 As shown, it is possible to achieve precise control of the refueling amount by directly controlling the state of the refueling pump 6 .

[0037] like Figure 2 As shown, unlike the structure of Example 1, this embodiment places turbine control selection relay 3 between normally closed relay 2 and fuel pump 6. The contact output of normally closed relay 2 is connected to the contact input of turbine control selection relay 3, which in turn is connected to fuel pump 6. The normally closed contact output of turbine control selection relay 3 is connected to power-on delay relay 8 and then to fuel pump 6, while the normally open contact output is directly connected to fuel pump 6. In this embodiment, the coil input of the normally closed relay is connected to liquid level gauge 7 to receive its signal, and the liquid level gauge 7 is also connected to the coil input of a second normally open relay.

[0038] When the refueling switch 5 is closed for refueling, if the turbine speed sensor 9 has no signal, the refueling pump 6 will start with a delay. When the liquid level gauge 7 feeds back a liquid level gauge signal, the normally closed relay control contact is disconnected. After the power-on delay time relay 8 realizes a delayed stop, thereby achieving over-refueling of the gearbox. If the turbine speed sensor 9 has a signal, the refueling pump 6 will start immediately. When the liquid level gauge 7 feeds back a liquid level gauge signal, the normally closed relay control contact is disconnected, and the refueling pump 6 will stop working immediately, thereby achieving accurate refueling.

[0039] This utility model provides a transmission refueling control structure that uses the transmission turbine speed sensor's signal to provide feedback on the actual vehicle status. This, in turn, coordinates with the liquid level gauge signal to control the refueling pump's delayed stop. This eliminates the need to rely solely on the liquid level gauge signal to determine refueling volume, thus achieving precise transmission oil refueling. Furthermore, by varying the model of the power-on delay switch and the displacement of the refueling pump (6), the system can be applied to a wide range of engineering machinery using transmissions.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A gearbox refueling control structure, characterized in that: include: The first normally open relay is connected to the normally closed relay and the refueling pump in sequence to control the action of the refueling pump; the input end of the normally closed relay is also connected to the turbine control selection relay, and the turbine control selection relay controls the normally closed relay to open the circuit according to the turbine status and liquid level status, so that the refueling pump stops working and completes refueling.

2. A transmission refueling control structure according to claim 1, characterized in that: The first normally open relay is connected to the normally closed relay and the refueling pump in sequence to control the action of the refueling pump. Specifically, the input end of the coil of the first normally open relay is connected to a refueling switch, the contact output end is connected to the contact input end of the normally closed relay, and the contact output end of the normally closed relay is connected to the refueling pump.

3. A transmission refueling control structure according to claim 1, characterized in that: The coil input end of the normally closed relay is connected to the contact output end of the turbine control selection relay, and the coil input end of the normally closed relay is grounded.

4. A transmission refueling control structure according to claim 1, characterized in that: The turbine state is collected by a turbine sensor and a turbine sensor signal is output; the liquid level state is collected by a liquid level gauge in the gearbox and a liquid level gauge signal is output.

5. A transmission oil refueling control structure as claimed in claim 4, characterized in that: The liquid level meter is connected to the turbine control selection relay contact input end; the normally closed contact output end is connected to the power-on delay time relay and then connected to the normally closed relay coil input end; the normally open contact output end is directly connected to the normally closed relay coil input end.

6. A transmission oil refueling control structure according to claim 5, characterized in that: The turbine control selection relay coil input end is provided with an AND gate circuit, the two input ends of the AND gate circuit are respectively connected to the liquid level meter and the turbine sensor, and the output end is connected to the turbine control selection relay coil input end.

7. The transmission refueling control structure according to claim 1, characterized in that: The turbine control selection relay is also connected to the second normally open relay to control the action of the second normally open relay; The coil input end of the second normally open relay is connected to the contact output end of the turbine control selection relay; the coil terminal of the second normally open relay is connected to the display instrument.

8. The transmission refueling control structure according to claim 1, characterized in that: The turbine control selection relay is arranged between the normally closed relay and the refueling pump, the contact output end of the normally closed relay is connected to the contact input end of the turbine control selection relay, and the contact output end of the turbine control selection relay is connected to the refueling pump.

9. A transmission oil refueling control structure according to claim 8, characterized in that: The contact output end of the turbine control selection relay is connected to the refueling pump as follows: the normally closed contact output end is connected to the power-on delay time relay and then connected to the refueling pump; the normally open contact output end is directly connected to the refueling pump.

10. A transmission oil refueling control structure according to claim 8, characterized in that: The coil input end of the normally closed relay is connected to a liquid level meter; the liquid level meter is also connected to the coil input end of the second normally open relay.

Images