Four-wheel steering control circuit of backhoe loader
By designing a four-wheel steering control circuit, the four-wheel steering function of the excavator loader is solved, and the problem of inflexible turning in a small space is significantly improved. Operation flexibility and safety are significantly improved.
Patent Information
- Application Number
- CN202420736949.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-11
AI Technical Summary
The existing excavation loaders are inflexible in a narrow space and the turning radius is too large, which increases the difficulty of operation and safety hazards.
Design a four-wheel steering control circuit, which can improve the steering control circuit to realize the four-wheel steering function, reduce the turning radius, and set a prompt light for four-wheel mode and two-wheel mode to help operators understand the current steering mode.
It significantly improves the operating flexibility and safety of the equipment in a small space, reduces the turning radius, and improves the operating efficiency and safety.
Smart Images
Figure CN222591571U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of steering control of a backhoe loader vehicle, in particular to a four-wheel steering control circuit of a backhoe loader. Background Art
[0002] As a multifunctional engineering machinery, backhoe loaders have been widely used in various construction projects. Traditional backhoe loaders usually adopt a steering method with front wheels steering and fixed rear wheels. However, this steering method has some obvious limitations in practical applications.
[0003] First, the steering method with front wheels steering and fixed rear wheels will result in a large turning radius. In open areas, this steering method can meet the normal operation requirements of the equipment. However, in narrow spaces such as indoors, lanes or urban blocks, the large turning radius limits the flexibility of the equipment. Therefore, when operators drive the backhoe loader into these areas, it is often difficult to make effective turns.
[0004] Secondly, since it is impossible to turn effectively in a small space, operators need to move the vehicle frequently to adjust the direction. This frequent vehicle movement not only reduces work efficiency and increases operation time, but may also cause the equipment to collide with surrounding objects, damaging the equipment or surrounding facilities. In addition, frequent vehicle movement may also have a negative impact on the physical health of operators, increasing fatigue and safety risks.
[0005] In summary, the steering method of existing excavator loaders has obvious problems in a narrow space, including excessive turning radius, limited operational flexibility and safety hazards. Utility Model Content
[0006] The utility model aims to provide a four-wheel steering control circuit for a backhoe loader in view of the above problems.
[0007] To achieve the above-mentioned purpose, the utility model discloses a four-wheel steering control circuit for an excavator loader, comprising a common power supply, to which a first normally open relay, a second normally open relay, a third normally open relay, a normally closed relay and a fourth normally open relay are electrically connected, the first normally open relay is electrically connected to a first inductive switch electrically connected to the common power supply and a first display instrument, the second normally open relay is electrically connected to a second inductive switch electrically connected to the common power supply and a second display instrument, a steering switching switch matched with the normally closed relay and the third normally open relay is arranged on the circuit between the third normally open relay and the common power supply, the third normally open relay is electrically connected to a four-wheel mode solenoid valve, the fourth normally open relay is electrically connected to the third normally open relay and the fourth normally open relay is electrically connected to a four-wheel mode warning light, and the normally closed relay is electrically connected to a two-wheel mode warning light.
[0008] After adopting the above structure, the four-wheel steering function is realized by improving the steering control circuit, thereby significantly improving the operational flexibility and safety of the equipment in a small space. At the same time, the four-wheel steering control circuit is provided with a four-wheel mode indicator light and a two-wheel mode indicator light so that the operator can clearly understand the current steering mode when switching the steering mode, thereby improving the operational safety.
[0009] Preferably, the first normally open relay includes a first relay normally open contact power-on circuit and a first relay coil power-on circuit, the input end circuit of the first relay normally open contact power-on circuit is connected to a common power supply and is located on the circuit at the front end of the steering switch, the output end circuit of the first relay normally open contact power-on circuit is electrically connected to the first display instrument, and the input end circuit of the first relay coil power-on circuit is electrically connected to the electrical signal output end of the first induction switch.
[0010] Preferably, the second normally open relay includes a second relay normally open contact power-on circuit and a second relay coil power-on circuit, the input end circuit of the second relay normally open contact power-on circuit is connected to a common power source and is located on the circuit at the front end of the steering switch, the output end circuit of the second relay normally open contact power-on circuit is electrically connected to the second display instrument, and the input end circuit of the second relay coil power-on circuit is electrically connected to the electrical signal output end of the second induction switch.
[0011] Preferably, the third normally open relay includes a third relay normally open contact power-on circuit and a third relay coil power-on circuit, the input end circuit of the third relay normally open contact power-on circuit and the input end circuit of the third relay coil power-on circuit are respectively electrically connected to a common power supply, the steering switch is arranged on the input end circuit of the third relay coil power-on circuit, and the output end circuit of the third relay normally open contact power-on circuit is electrically connected to a four-wheel mode solenoid valve.
[0012] Preferably, the fourth normally open relay includes a fourth relay normally open contact power-on circuit and a fourth relay coil power-on circuit, the input end circuit of the fourth relay normally open contact power-on circuit is electrically connected to a common power supply and the output end circuit of the fourth relay normally open contact power-on circuit is electrically connected to a four-wheel mode warning light, and the circuit at the input end of the fourth relay coil power-on circuit is electrically connected to the third relay coil power-on circuit located at the rear end of the steering switch.
[0013] Preferably, the normally closed relay includes a relay normally closed contact power-on circuit and a fifth relay coil power-on circuit, the input end circuit of the relay normally closed contact power-on circuit is electrically connected to a common power supply and the output end circuit of the relay normally closed contact power-on circuit is electrically connected to a two-wheel mode warning light, and the input end circuit of the fifth relay coil power-on circuit is electrically connected to the third relay coil power-on circuit located at the rear end of the steering switch.
[0014] To sum up, the beneficial effects of the utility model are: the utility model has a simple structure and is easy to operate. By improving the steering control circuit, the four-wheel steering function is realized, the turning radius of the equipment in a small space is significantly reduced, and the operational safety is improved; at the same time, by setting the steering mode prompt light, it is convenient for the operator to understand the current steering mode in time and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is the electrical schematic diagram of the utility model as a whole.
[0016] In the figure: 1. Common power supply; 2. First normally open relay; 3. Second normally open relay; 4. Third normally open relay; 5. Normally closed relay; 6. Fourth normally open relay; 7. First induction switch; 8. First display instrument; 9. Second induction switch; 10. Second display instrument; 11. Steering switch; 12. Four-wheel mode solenoid valve; 13. Four-wheel mode warning light; 14. Two-wheel mode warning light; 15. First relay normally open contact power circuit; 16. First relay coil power circuit; 17. Electrical signal output terminal; 18. Second relay normally open contact power circuit; 19. Second relay coil power circuit; 20. Third relay normally open contact power circuit; 21. Third relay coil power circuit; 22. Fourth relay normally open contact power circuit; 23. Fourth relay coil power circuit; 24. Relay normally closed contact power circuit; 25. Fifth relay coil power circuit. DETAILED DESCRIPTION
[0017] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0018] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.
[0019] like Figure 1 As shown, the utility model includes a common electric power source 1, to which a first normally open relay 2, a second normally open relay 3, a third normally open relay 4, a normally closed relay 5 and a fourth normally open relay 6 are electrically connected. During design, the first normally open relay 2 includes a first relay normally open contact power-on circuit 15 and a first relay coil power-on circuit 16, the second normally open relay 3 includes a second relay normally open contact power-on circuit 18 and a second relay coil power-on circuit 19, and the third normally open relay 4 includes a third relay normally open contact power-on circuit 20 and a third relay coil power-on circuit 21, the fourth normally open relay 6 includes a fourth relay normally open contact power-on circuit 22 and a fourth relay coil power-on circuit 23, and the normally closed relay 5 includes a relay normally closed contact power-on circuit 24 and a fifth relay coil power-on circuit 25.
[0020] The first normally open relay 2 is electrically connected to a first inductive switch 7 and a first display instrument 8 which are electrically connected to a common power supply 1, and the second normally open relay 3 is electrically connected to a second inductive switch 9 and a second display instrument 10 which are electrically connected to the common power supply 1, wherein a steering switch 11 which cooperates with the normally closed relay 5 and the third normally open relay 4 is provided on the circuit between the third normally open relay 4 and the common power supply 1. During design, the input end circuit of the first relay normally open contact power circuit 15 is connected to the common power supply 1 and is located on the circuit at the front end of the steering switch 11, the output end circuit of the first relay normally open contact power circuit 15 is electrically connected to the first display instrument 8, and the input end circuit of the first relay coil power circuit 16 is electrically connected to the electrical signal output end 17 of the first inductive switch 7. The input circuit of the second relay normally open contact power circuit 18 is connected to the common power supply 1 and is located on the circuit at the front end of the steering switch 11. The output circuit of the second relay normally open contact power circuit 18 is electrically connected to the second display meter 10, and the input circuit of the second relay coil power circuit 19 is electrically connected to the electrical signal output terminal 17 of the second induction switch 9. In this way, through the cooperation of the first induction switch 7 and the second induction switch 9, it is possible to detect in real time whether the front wheel and the rear wheel have reached the neutral state, and the state can be displayed through the first display meter 8 and the second display meter 10. Usually, when installed, the first display meter 8 displays the state of the front wheel, and the second display meter 10 displays the state of the rear wheel.
[0021] The fourth normally open relay 6 is electrically connected to the third normally open relay 4 and a four-wheel mode warning light 13 is electrically connected to the fourth normally open relay 6, while a two-wheel mode warning light 14 is electrically connected to the normally closed relay 5. When designing, the input end circuit of the third relay normally open contact power circuit 20 and the input end circuit of the third relay coil power circuit 21 are respectively electrically connected to the common power supply 1, the steering switch 11 is arranged on the input end circuit of the third relay coil power circuit 21, and the output end circuit of the third relay normally open contact power circuit 20 is electrically connected to the four-wheel mode solenoid valve 12. The input end circuit of the fourth relay normally open contact power circuit 22 is electrically connected to the input end circuit of the third relay coil power circuit 21. The circuit is electrically connected to the common power supply 1 and the output end circuit of the fourth relay normally open contact power circuit 22 is electrically connected to the four-wheel mode warning light 13, and the circuit of the input end of the fourth relay coil power circuit 23 is electrically connected to the third relay coil power circuit 21 located at the rear end of the steering switch 11, and the input end circuit of the relay normally closed contact power circuit 24 is electrically connected to the common power supply 1 and the output end circuit of the relay normally closed contact power circuit 24 is electrically connected to the two-wheel mode warning light 14, wherein the circuit of the input end of the fifth relay coil power circuit 25 is electrically connected to the third relay coil power circuit 21 located at the rear end of the steering switch 11.
[0022] During use, when the backhoe loader is in the front-wheel steering mode during normal operation, the steering switch 11 is disconnected, the common power supply 1 energizes the circuit 24 through the normally closed contact of the relay, and the two-wheel mode indicator light 14 on the circuit is always on, indicating that the mode is the front-wheel mode; when the front-wheel steering mode is switched to the four-wheel steering mode, the front and rear wheels of the vehicle are controlled to reach the neutral state at the same time by turning the steering wheel, and the states of the front and rear wheels are sensed by the first sensing switch 7 and the second sensing switch 9 respectively. When the front and rear wheels reach the neutral state, electrical signals are output respectively, so that the switches of the first normally open relay 2 and the second normally open relay 3 are energized, so that the first display instrument 8 and the second display instrument 10 are always on. At this time, The staff closes the steering switch 11, the fifth relay coil power circuit 25 is energized and the relay normally closed contact power circuit 24 switch is disconnected, the two-wheel mode warning light 14 is controlled to be turned off, and the fourth relay coil power circuit 23 is energized and the switch on the fourth relay normally open contact power circuit 22 is attracted, the four-wheel mode warning light 13 is controlled to be always on, and at the same time, the electrical signal passes through the third relay coil power circuit 21, so that the third relay normally open contact power circuit 20 is closed to control the solenoid valve of the four-wheel mode to work; and when the four-wheel mode is converted to the front-wheel mode, the steering wheel is turned, and the front and rear wheels are in a synchronized state. When the two-wheel display reaches the neutral state, the steering switch 11 can be disconnected.
[0023] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. A four-wheel steering control circuit for an excavator loader, comprising a common electric power source (1), characterized in that: The common power supply (1) is electrically connected to a first normally open relay (2), a second normally open relay (3), a third normally open relay (4), a normally closed relay (5) and a fourth normally open relay (6); the first normally open relay (2) is electrically connected to a first inductive switch (7) electrically connected to the common power supply (1) and a first display instrument (8); the second normally open relay (3) is electrically connected to a second inductive switch (9) electrically connected to the common power supply (1) and a second display instrument (10); a steering switch (11) matched with the normally closed relay (5) and the third normally open relay (4) is provided on the circuit between the third normally open relay (4) and the common power supply (1); the third normally open relay (4) is electrically connected to a four-wheel mode solenoid valve (12); the fourth normally open relay (6) is electrically connected to the third normally open relay (4) and the fourth normally open relay (6) is electrically connected to a four-wheel mode warning light (13); and the normally closed relay (5) is electrically connected to a two-wheel mode warning light (14).
2. The four-wheel steering control circuit of an excavator loader as claimed in claim 1, characterized in that: The first normally open relay (2) comprises a first relay normally open contact power circuit (15) and a first relay coil power circuit (16); an input end circuit of the first relay normally open contact power circuit (15) is connected to a common power source (1) and is located on a circuit at the front end of the steering switch (11); an output end circuit of the first relay normally open contact power circuit (15) is electrically connected to a first display instrument (8); and an input end circuit of the first relay coil power circuit (16) is electrically connected to an electrical signal output end (17) of a first induction switch (7).
3. The four-wheel steering control circuit of an excavator loader as claimed in claim 1, characterized in that: The second normally open relay (3) comprises a second relay normally open contact power circuit (18) and a second relay coil power circuit (19); the input end circuit of the second relay normally open contact power circuit (18) is connected to a common power source (1) and is located on a circuit at the front end of the steering switch (11); the output end circuit of the second relay normally open contact power circuit (18) is electrically connected to a second display instrument (10); and the input end circuit of the second relay coil power circuit (19) is electrically connected to an electrical signal output end (17) of a second induction switch (9).
4. The four-wheel steering control circuit for an excavator loader as claimed in claim 1, characterized in that: The third normally open relay (4) comprises a third relay normally open contact power circuit (20) and a third relay coil power circuit (21); the input end circuit of the third relay normally open contact power circuit (20) and the input end circuit of the third relay coil power circuit (21) are respectively electrically connected to a common power source (1); the steering switch (11) is arranged on the input end circuit of the third relay coil power circuit (21); and the output end circuit of the third relay normally open contact power circuit (20) is electrically connected to a four-wheel mode solenoid valve (12).
5. The four-wheel steering control circuit for an excavator loader as claimed in claim 1, characterized in that: The fourth normally open relay (6) comprises a fourth relay normally open contact power-on circuit (22) and a fourth relay coil power-on circuit (23); an input end circuit of the fourth relay normally open contact power-on circuit (22) is electrically connected to a common power source (1), and an output end circuit of the fourth relay normally open contact power-on circuit (22) is electrically connected to a four-wheel mode warning light (13); and an input end circuit of the fourth relay coil power-on circuit (23) is electrically connected to a third relay coil power-on circuit (21) located at the rear end of the steering switch (11).
6. The four-wheel steering control circuit of an excavator loader as claimed in claim 1, characterized in that: The normally closed relay (5) comprises a relay normally closed contact power-on circuit (24) and a fifth relay coil power-on circuit (25), wherein an input end circuit of the relay normally closed contact power-on circuit (24) is electrically connected to a common power source (1) and an output end circuit of the relay normally closed contact power-on circuit (24) is electrically connected to a two-wheel mode warning light (14), and an input end circuit of the fifth relay coil power-on circuit (25) is electrically connected to a third relay coil power-on circuit (21) located at the rear end of the steering switch (11).