Proportional electro-hydraulic dual pedal device

Abstract

The utility model discloses a kind of proportional electro-hydraulic dual-purpose pedal devices, proportional electro-hydraulic dual-purpose pedal device is used for excavator, comprising: pedal main body unit, double mode drive unit, double mode drive unit is connected with pedal main body unit by interlock switching mechanism, pedal main body unit includes pedal, motor and main valve core, pedal is movably connected with support by the output shaft of motor, valve core rocker arm is movably connected with valve core push rod structure, output shaft;Manual mechanical control module includes hook bolt, first pin hole and the first limit hole on valve core rocker arm, make pedal control valve core rocker arm push valve core push rod structure movement by movable hook bolt, electric control module includes handle, control box, operating handle drive motor rotation makes valve core rocker arm push valve core push rod movement, realize electric control or manual mode quick switching by hook bolt plug-in play.The utility model structure is simple, convenient to use, switch conveniently, maintenance is easy, high reliability, long life.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a proportional electro-hydraulic dual-purpose pedal device. Background Technology

[0002] With the development of technology, excavators have become one of the most important construction machines in engineering projects, and are widely used in mechanical construction such as water conservancy projects, transportation, power engineering and mining.

[0003] However, the design of the pedal device in existing excavators is unreasonable. Although many models are equipped with intelligent control systems and manual control systems, the structure is complex, the operation is inconvenient, the switching cannot be timely, the failure rate is high, the maintenance is not convenient, and the operating cost is high. There is still a need to improve it.

[0004] In view of this, designing a simple, easy-to-install, easy-to-disassemble, safe, reliable, low-cost, and easily switchable electro-hydraulic dual-purpose pedal device without solenoid valves is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a proportional electro-hydraulic dual-purpose pedal device that is simple in structure, easy to use, easy to process and manufacture, low in cost, easy to maintain, highly reliable, long in service life, and can achieve manual control of speed.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] A proportional electro-hydraulic dual-purpose pedal device for excavators includes: a pedal main unit and a dual-mode drive unit. The dual-mode drive unit is movably connected to the pedal main unit via an interlocking switching mechanism. The pedal main unit includes a pedal, a main valve core, and a motor. A V-shaped support plate is integrally and vertically provided at the lower part of the pedal, and a circular mounting hole is provided at the lower end of the V-shaped support plate. The motor and the main valve core are respectively mounted on the support. The pedal is movably connected to the support via the output shaft of the motor, and a limit switch is embedded in the upper part of the free end of the output shaft. On the plane, the upper part of the support is provided with a valve core push rod structure and a valve core rocker arm. The valve core rocker arm is provided with a first limiting hole and a second limiting hole at intervals. The dual-mode drive unit includes a manual mechanical module and an electronic control module. The manual mechanical module includes a strip fixing plate and a hook pin. The strip fixing plate is horizontally set on the V-shaped support plate. The strip fixing plate is provided with a first pin hole and a circular clearance hole. The first pin hole and the circular clearance hole are respectively provided with the first limiting hole and the second limiting hole. The hook pin is movably connected to the first pin hole and the first limiting hole.

[0008] The electronic control module includes a handle and a control box. The control box is electrically connected to the handle and the motor respectively. The output shaft passes through the circular mounting hole and is movably connected to the valve core rocker arm. A pin is movably provided on the valve core rocker arm, and the pin abuts against the limiting plane. The motor rotates the valve core rocker arm through the output shaft, causing the valve core rocker arm to push the valve core push rod structure to move, thereby controlling the hydraulic oil flow.

[0009] The interlocking switching mechanism consists of the folding hook pin and the first pin hole and the first limiting hole that match the folding hook pin. The folding hook pin achieves interlocking between the manual mechanical module and the electronic control module by inserting and pulling the first pin hole and the first limiting hole. The pedal can be inserted into the first pin hole and the first limiting hole through the folding hook pin to lock the strip fixing plate and the valve core rocker arm. The valve core rocker arm is linked with the main valve core, causing the valve core rocker arm to push the valve core push rod structure to move and control the hydraulic oil flow.

[0010] In the above structure, the valve core rocker arm has a cross-section in the shape of a cross. The valve core rocker arm includes a pressure plate and a bushing. The pressure plate is horizontally arranged on the upper part of the bushing. The bushing is fixedly connected to the pressure plate as a whole. The central axis of the bushing coincides with the vertical center plane of the pressure plate. The bushing matches the output shaft. The first limiting hole is vertically arranged at the end of the bushing. The second limiting hole passes through the pressure plate and the bushing.

[0011] In the above structure, the valve core push rod structure includes a vertically arranged valve core guide cylinder and a valve core push rod. Two valve core guide cylinders and valve core push rods are correspondingly arranged on the support and penetrate through the bottom of the support. The two valve core guide cylinders correspond to the oil inlet and oil outlet on the main valve core, respectively. The two valve core push rods are respectively connected to the pressure plate bolts movably arranged at the top. The bolts are used to adjust the stroke of the valve core push rods. The main valve core adjusts the flow rate of the oil inlet and oil outlet according to the command to control the opening of the hydraulic mechanism of the excavator.

[0012] In the above structure, the strip fixing plate is horizontally arranged on the side of the V-shaped support plate away from the motor. The strip fixing plate is integrally formed with the V-shaped support plate. The circular mounting hole is located at the lower part of the strip fixing plate. The center plane of the strip fixing plate coincides with the center axis of the circular mounting hole. The side of the strip fixing plate is provided with a baffle with an L-shaped cross section.

[0013] In the above structure, the V-shaped support plate matches the pedal, and the upper part of the pedal is provided with an anti-slip structure at intervals.

[0014] In the above structure, the support is a plate-shaped structure with an L-shaped cross-section. The support includes a base plate and a side plate. The side plate is vertically arranged on the upper part of the base plate. The side plate is provided with a circular mounting hole through which the output shaft passes and a connection hole for fixing the motor. The output shaft passes through the circular mounting hole and is movably connected to the V-shaped support plate.

[0015] In the above structure, the base plate is provided with a fixing hole and an oil passage hole respectively corresponding to the main valve core. There are two oil passage holes, which are respectively provided with the oil inlet hole and the oil outlet hole. A sealing structure is provided between the two oil passage holes and the main valve core. The main valve core is bolted to the base plate.

[0016] In the above structure, the handle includes a dial mounted on the handle and a control device that matches the dial.

[0017] In the above structure, the control box includes a main control PCB board and a corresponding control system. The main control PCB board is provided with a control circuit and a microprocessor connected to the control circuit. The control box is electrically connected to the handle.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention improves the excavator pedal device, enabling rapid manual and electric control, significantly reducing maintenance costs and failure rates. The excavator can be operated manually or manually, depending on the driver's preference. Drivers who prefer foot operation can use the pedals, while those accustomed to manual operation can use their hands. This overcomes the complexities of traditional control systems in terms of installation, debugging, and maintenance, simplifying system design and improving excavation efficiency. The invention features a simple structure and ease of use, achieving second-level switching between electric and manual modes via a snap-fit ​​hook pin, requiring no additional tools. It is also easy to install and disassemble, maintain, and offers high reliability and long service life. Attached Figure Description

[0020] Figure 1 This is a front view of an embodiment of the proportional electro-hydraulic dual-purpose pedal device of this utility model;

[0021] Figure 2 This is a right view of an embodiment of the proportional electro-hydraulic dual-purpose pedal device of this utility model;

[0022] Figure 3 This is a top view of an embodiment of the proportional electro-hydraulic dual-purpose pedal device of this utility model;

[0023] Figure 4 This is one of the cross-sectional structural diagrams of an embodiment of the proportional electro-hydraulic dual-purpose pedal device of this utility model;

[0024] Figure 5 This is the second cross-sectional structural diagram of an embodiment of the proportional electro-hydraulic dual-purpose pedal device of this utility model;

[0025] Figure 6 This is a perspective structural diagram of an embodiment of the proportional electro-hydraulic dual-purpose pedal device of this utility model;

[0026] Figure 7 This is a schematic diagram of the pedal structure in an embodiment of the proportional electro-hydraulic dual-purpose pedal device of this utility model;

[0027] Figure 8 This is a schematic diagram of the valve core rocker arm in an embodiment of the proportional electro-hydraulic dual-purpose pedal device of this utility model;

[0028] Figure 9 This is an exploded view of an embodiment of the proportional electro-hydraulic dual-purpose pedal device of this utility model.

[0029] In the diagram, 1-pedal, 2-motor, 3-main valve core, 4-V-shaped support plate, 5-support, 51-base plate, 52-fixed plate, 6-strip fixed plate, 7-valve core rocker arm, 71-pressure plate, 72-shoulder sleeve, 8-first limiting hole, 9-second limiting hole, 10-hook pin, 11-first pin hole, 12-valve core guide cylinder, 13-valve core push rod, 14-oil inlet, 15-oil outlet, 16-bolt, 17-stop rib, 18-pin. Detailed Implementation

[0030] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figure 1-9As shown, a proportional electro-hydraulic dual-purpose pedal device is used in excavators. It includes a pedal main unit and a dual-mode drive unit. The dual-mode drive unit is movably connected to the pedal main unit via an interlocking switching mechanism. The pedal main unit includes a pedal 1, a motor 2, and a main valve core 3. A V-shaped support plate 4 is integrally and vertically mounted on the lower part of the pedal 1. The lower end of the V-shaped support plate 4 has a circular mounting hole. The motor 2 and the main valve core 3 are respectively mounted on a support 5. The pedal 1 is movably connected to the support 5 via the output shaft of the motor 2. A limiting plane is embedded in the upper part of the free end of the output shaft. The upper part of the seat 5 is provided with a valve core push rod structure and a valve core rocker arm 7. The valve core rocker arm 7 is provided with a first limiting hole 8 and a second limiting hole 9 at intervals. The dual-mode drive unit includes a manual mechanical module and an electric control module. The manual mechanical module includes a strip fixing plate 6 and a hook pin 10. The strip fixing plate 6 is horizontally set on the V-shaped support plate 4. The strip fixing plate 6 is provided with a first pin hole 11 and a circular clearance hole. The first pin hole 11 and the circular clearance hole are respectively provided with the first limiting hole 8 and the second limiting hole 9. The hook pin 9 is movably connected to the first pin hole 11 and the first limiting hole 8.

[0032] The electronic control module includes a handle and a control box. The handle includes internal microswitches and other components. The control box is electrically connected to the handle and motor 2. The output shaft passes through a circular mounting hole and is movably connected to the valve core rocker arm 7. A pin 20 is movably mounted on the valve core rocker arm 7, and the pin abuts against the limiting plane. The motor 2 rotates the valve core rocker arm 7 through the output shaft, causing the valve core rocker arm 7 to push the valve core push rod structure to move, thus controlling the flow of hydraulic oil.

[0033] The interlocking switching mechanism consists of a hook pin 10 and a first pin hole 11 and a first limit hole 8 that match the hook pin 10. The hook pin 10 achieves interlocking between the manual mechanical module and the electrical control module by inserting and pulling the first pin hole 11 and the first limit hole 8. The pedal 1 can be inserted into the first pin hole 11 and the first limit hole 8 through the hook pin 10 to lock the strip fixing plate 6 and the valve core rocker arm 7. The valve core rocker arm 7 is linked with the main valve core 3, so that the valve core rocker arm 7 pushes the valve core push rod structure to move and control the hydraulic oil flow.

[0034] Specifically, in this embodiment, the pedal 1 can rotate relative to the support 5 via the output shaft, and the pedal 1 can be controlled to move back and forth by foot, so that the valve core rocker arm 7 pushes the valve core push rod structure to move.

[0035] Specifically, in this embodiment, the V-shaped support plate 4 is matched with the pedal 1, the pedal 1 and the V-shaped support plate 4 are welded together, and the upper part of the pedal 1 is provided with an anti-slip structure at intervals.

[0036] Specifically, in this embodiment, the folding hook pin 10 is detachably mounted on the strip fixing plate 6. The folding hook pin 10 matches the first pin hole 11 and the first limiting hole 8. The folding hook pin 10 is provided with a limiting structure.

[0037] Specifically, in this embodiment, the MCU of the electronic control module receives instructions and outputs PWM signals to control the direction and speed of the drive motor 2.

[0038] Specifically, in this embodiment, when the hook pin 10 in the interlocking switching mechanism is inserted into the first pin hole 11 and the first limit hole 8, it is in manual mode; when it is pulled out, the motor 2 drives the valve core rocker arm 7 to electric mode.

[0039] In a preferred embodiment of this utility model, the valve core rocker arm 7 has a cross-section in the shape of a cross. The valve core rocker arm 7 includes a pressure plate 71 and a bushing 72. The pressure plate 71 is horizontally disposed on the upper part of the bushing 72. The bushing 72 is fixedly connected to the pressure plate 71 as a whole. The central axis of the bushing 72 coincides with the vertical center plane of the pressure plate 71. The bushing 72 is matched with the output shaft. The first limiting hole 8 is vertically disposed at the end of the bushing 72. The second limiting hole 9 is disposed through the plate 71 and the bushing 72.

[0040] Specifically, in this embodiment, the bushing 72 is provided with a second limiting hole 9, which is correspondingly provided with a circular clearance hole. The valve core rocker arm 7 and the motor 2 are fixedly connected by a pin through the second limiting hole 9.

[0041] Specifically, in this embodiment, the second limiting hole 9 can be an internal threaded hole, and the pin 18 can be a screw that matches the internal threaded hole. The second limiting hole 9 and the pin 18 are rotatably connected.

[0042] In a preferred embodiment of this utility model, the valve core push rod structure includes a vertically arranged valve core guide cylinder 12 and a valve core push rod 13. The two valve core guide cylinders 12 and the valve core push rod 13 are respectively arranged on the support 5 and pass through the bottom of the support 5. The two valve core guide cylinders 12 correspond to the oil inlet hole 14 and the oil outlet hole 15 on the main valve core 3, respectively. The two valve core push rods 13 are respectively connected to the top movable pressure plate 71 bolt 16. The bolt 16 is used to adjust the stroke of the valve core push rod. The main valve core 3 adjusts the flow rate of the oil inlet hole 14 and the oil outlet hole 15 according to the command to control the opening of the hydraulic mechanism of the excavator.

[0043] Specifically, in this embodiment, there are two valve core guide cylinders 12 and two valve core push rods 13. The two valve core push rods 13 are symmetrically arranged and are slidably connected to the corresponding two valve core guide cylinders 12. The two valve core guide cylinders 12 are respectively sealed to the oil inlet pipe and oil outlet pipe on the main valve core 3 through the oil inlet hole 14 and the oil outlet hole 15.

[0044] In a preferred embodiment of this utility model, the strip fixing plate 6 is horizontally arranged on the side of the V-shaped support plate away from the motor 2. The strip fixing plate 6 and the V-shaped support plate are integrally formed. The circular mounting hole is located at the lower part of the strip fixing plate 6. The center plane of the strip fixing plate 6 coincides with the central axis of the circular mounting hole. The side of the strip fixing plate 6 is provided with a baffle 17 with an L-shaped cross section.

[0045] Specifically, in this embodiment, the middle part of the strip fixing plate 6 is provided with a clearance hole for installing a pin. The clearance hole is correspondingly provided with the second limiting hole 9. The clearance hole can be a horn hole.

[0046] In a preferred embodiment of this utility model, the V-shaped support plate matches the pedal 1, and the upper part of the pedal 1 is provided with an anti-slip structure at intervals.

[0047] In a preferred embodiment of the present invention, the support 5 is a plate-shaped structure with an L-shaped cross section. The support 5 includes a base plate 51 and a side plate 52. The side plate 52 is vertically arranged on the upper part of the base plate 51. The side plate 52 is provided with a circular mounting hole through which the output shaft passes and a connection hole for fixing the motor 2. The output shaft passes through the circular mounting hole and is movably connected to the V-shaped support plate.

[0048] Specifically, in this embodiment, the pedal 1 can rotate relative to the support 5 via the output shaft.

[0049] In a preferred embodiment of this utility model, the base plate 51 is provided with a fixing hole and an oil passage hole corresponding to the main valve core 3. There are two oil passage holes, which are respectively provided with oil inlet hole 14 and oil outlet hole 15. A sealing structure is provided between the two oil passage holes and the main valve core 3. The main valve core 3 is bolted to the base plate 51.

[0050] Specifically, in this embodiment, an anti-slip pad with anti-slip texture is fixedly provided on the upper part of the pedal 1, and the anti-slip pad matches the pedal 1.

[0051] In a preferred embodiment of the present invention, the support 5 is a plate-shaped structure with an L-shaped cross section. The support 5 includes a base plate 51 and a fixing plate 52. The fixing plate 52 is vertically arranged on the upper part of the base plate 52. The middle part of the fixing plate 52 is provided with a circular clearance hole through which the output shaft passes. The output shaft passes through the circular clearance hole and is movably connected to the V-shaped support plate.

[0052] Specifically, in this embodiment, the base plate 51 and the fixing plate 52 are provided with multiple fixing holes corresponding to the main valve core 3 and the motor 2, respectively, and the main valve core 3, the motor 2 and the support 5 are connected by screws.

[0053] In a preferred embodiment of this utility model, the fixing plate 52 is provided with a fixing hole and two oil passage holes corresponding to the main valve core 3. The two oil passage holes are respectively provided with oil inlet hole 15 and oil outlet hole 16. A sealing structure is provided between the oil inlet hole 14 and oil outlet hole 15 corresponding to the two oil passage holes. The main valve core 3 is bolted to the fixing plate.

[0054] Specifically, in this embodiment, the bottom of the main valve core 3 is provided with an oil inlet and an oil outlet.

[0055] In a preferred embodiment of this invention, the handle includes a dial mounted on the handle and a control device that matches the dial.

[0056] Specifically, in this embodiment, the dial includes a control structure that matches the dial.

[0057] In a preferred embodiment of this utility model, the control box includes a main control PCB board and a corresponding control system. The main control PCB board is provided with a control circuit and a microprocessor connected to the control circuit. The control box is electrically connected to the handle.

[0058] Specifically, in this embodiment, the handle and control box are located outside the pedal main unit, the handle is wired to the control box, and the control box is electrically connected to the motor 2.

[0059] Specifically, in this embodiment, the control box is electrically connected to an external power supply or an energy storage power supply.

[0060] Specifically, in this embodiment, the proportional electro-hydraulic dual-purpose pedal device switches the control mode through the position of the hook pin 10. In the electric control mode, the MCU analyzes the signal to drive the motor, and in the manual mode, the foot pedal 1 directly pushes the valve core push rod.

[0061] Specifically, in this embodiment, the electronic control response time is ≤200ms (measured data); the manual mode push rod stroke error is ±1mm (adjusted via bolt 4).

[0062] The proportional electro-hydraulic dual-purpose pedal device has two operating modes: manual control mode and electric control mode. By inserting or removing the hook pin, the different working states of the device can be switched, realizing physical isolation and rapid switching between the two control modes. In the electric control mode, precise control is achieved through the handle, while in the manual mode, the hydraulic valve is directly mechanically linked by stepping on the pedal.

[0063] The specific operating steps are as follows:

[0064] S1: When the electric control mode is required, the operator first pulls out the hook pin, so that the valve core rocker arm and the V-shaped support plate integrated with the lower part of the pedal are movably connected (not locked), so that the motor can drive the valve core rocker arm, and adjust the opening of the hydraulic valve by driving the rocker arm to achieve the proportional output of hydraulic oil.

[0065] S2: When the operator presses the button or operating handle, a switch action is triggered to generate an electrical signal. This signal is transmitted to the pedal main unit and the electronic control module through the connecting cable. The electronic control module controls the motor to run according to the signal type, which in turn drives the main valve core to move, thereby realizing the operation control of the entire system. When the system pressure exceeds the set pressure, the hydraulic oil pushes the main valve core to make part of the oil flow back to the oil tank to maintain pressure stability. When flow control is required, the hydraulic oil flow is adjusted by changing the opening of the throttle port between the main valve core and the valve body, thereby realizing the operation control of the entire system.

[0066] S3: When manual control mode is required in emergency or heavy-load conditions, the operator inserts the pin into the first pin hole and the first limit hole, so that the valve core rocker arm is locked to the V-shaped support plate integrated with the lower part of the pedal. The operator applies force with his foot, and transmits power or sends an operation signal by stepping on the pedal. This allows the pedal stroke to be converted into the valve core rocker arm angle through the linkage, thereby driving the main valve core to move and realize hydraulic flow output, thus completing the manual operation function and realizing the operation and control of the entire system.

[0067] Working principle of the electronic control module:

[0068] The handwheel on handle 17 sends a signal when pushed left or right (forward or backward) to the control box. The signal is processed by the MCU in the control box, amplified, and then output to the controlled motor 2. When the main control PCB (excavator chip motherboard) receives a clockwise command, the controlled motor 2 operates, pushing the main valve core 3 via the valve core rocker arm 7 → valve core push rod 13. The oil flow direction is → oil inlet 14 → controlled flow valve body oil circuit → output from oil outlet 15 to the controlled flow hydraulic oil device. Thus, the opening of the hydraulic oil device is controlled by the input and output flow rate of the hydraulic oil. When the main control PCB (excavator chip motherboard) receives a counter-clockwise command, the controlled motor 2 operates, pushing the main valve core 3 via the valve core rocker arm 7 → valve core push rod 13. The oil flow direction is → oil inlet 14 → controlled flow valve body oil circuit → output from oil outlet 16 to the controlled flow hydraulic oil device, thereby controlling the rotation of the excavator engine.

[0069] Working principle of manual mechanical control module:

[0070] The manual mechanical control module (foot pedal, non-electro-hydraulic control) self-locks to the first pin hole 11 on the strip-shaped fixing plate 6 at the bottom of the (foot) pedal 1 and the first limiting hole 8 on the valve core rocker arm 7 via a hook pin 10. Removing the hook pin 10 from the pedal 1 allows it to self-lock into the vertical holes of the pedal 1 and the valve core rocker arm 7, thus enabling non-electric control. The pedal 1 defaults to the center position, and its forward and backward movement is controlled by foot.

[0071] In this invention, the mechanical parts of the non-electric control system and the electric control system are the same.

[0072] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0073] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0074] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A proportional electro-hydraulic dual-purpose pedal device, said proportional electro-hydraulic dual-purpose pedal device being used in an excavator, characterized in that, include: The system comprises a pedal main unit and a dual-mode drive unit. The dual-mode drive unit is movably connected to the pedal main unit via an interlocking switching mechanism. The pedal main unit includes a pedal, a main valve core, and a motor. A V-shaped support plate is integrally and vertically mounted on the lower part of the pedal, and a circular mounting hole is provided at the lower end of the V-shaped support plate. The motor and the main valve core are respectively mounted on a support. The pedal is movably connected to the support via the output shaft of the motor. A limiting plane is embedded in the upper part of the free end of the output shaft. A valve core push rod structure and a valve core rocker arm are correspondingly provided on the upper part of the support. The valve core rocker arm is provided with a first limiting hole and a second limiting hole at intervals. The dual-mode drive unit includes a manual mechanical module and an electronic control module. The manual mechanical module includes a strip-shaped fixing plate and a hook pin. The strip-shaped fixing plate is horizontally mounted on the V-shaped support plate. The strip-shaped fixing plate is provided with a first pin hole and a circular clearance hole, which correspond to the first limiting hole and the second limiting hole, respectively. The hook pin is movably connected to the first pin hole and the first limiting hole. The hook pin is used to realize manual and electronic control. The mode switching function achieves physical isolation and rapid switching between two control modes by inserting and removing the switchable device to different working states. The electronic control module includes a handle and a control box. The control box is electrically connected to the handle and the motor respectively. The output shaft passes through the circular mounting hole and is movably connected to the valve core rocker arm. A pin is movably provided on the valve core rocker arm. The pin abuts against the limiting plane. The motor rotates the valve core rocker arm through the output shaft, causing the valve core rocker arm to push the valve core push rod structure to move, thereby controlling the hydraulic oil flow. The interlocking switching mechanism consists of the folding hook pin and the first pin hole and the first limiting hole that match the folding hook pin. The folding hook pin achieves interlocking between the manual mechanical module and the electronic control module by inserting and pulling the first pin hole and the first limiting hole. The pedal can be inserted into the first pin hole and the first limiting hole through the folding hook pin to lock the strip fixing plate and the valve core rocker arm. The valve core rocker arm is linked with the main valve core, causing the valve core rocker arm to push the valve core push rod structure to move and control the hydraulic oil volume.

2. The proportional electro-hydraulic dual-purpose pedal device according to claim 1, characterized in that, The valve core rocker arm has a cross-section in the shape of a cross. The valve core rocker arm includes a pressure plate and a bushing. The pressure plate is horizontally disposed on the upper part of the bushing. The bushing is fixedly connected to the pressure plate as a whole. The central axis of the bushing coincides with the vertical center plane of the pressure plate. The bushing is matched with the output shaft. The first limiting hole is vertically disposed at the end of the bushing. The second limiting hole passes through the pressure plate and the bushing.

3. The proportional electro-hydraulic dual-purpose pedal device according to claim 2, characterized in that, The valve core push rod structure includes a vertically arranged valve core guide cylinder and a valve core push rod. Two valve core guide cylinders and valve core push rods are correspondingly arranged on the support and pass through the bottom of the support. The two valve core guide cylinders correspond to the oil inlet and oil outlet on the main valve core, respectively. The two valve core push rods are respectively connected to the pressure plate bolts that are movably arranged at the top. The bolts are used to adjust the stroke of the valve core push rods. The main valve core adjusts the flow rate of the oil inlet and oil outlet according to the command to control the opening of the hydraulic mechanism of the excavator.

4. The proportional electro-hydraulic dual-purpose pedal device according to claim 1, characterized in that, The strip-shaped fixing plate is horizontally arranged on the side of the V-shaped support plate away from the motor. The strip-shaped fixing plate is integrally formed with the V-shaped support plate. The circular mounting hole is located at the lower part of the strip-shaped fixing plate. The center plane of the strip-shaped fixing plate coincides with the center axis of the circular mounting hole. The side of the strip-shaped fixing plate is provided with L-shaped baffles.

5. The proportional electro-hydraulic dual-purpose pedal device according to claim 1, characterized in that, The V-shaped support plate matches the pedal, and the upper part of the pedal is provided with an anti-slip structure at intervals.

6. The proportional electro-hydraulic dual-purpose pedal device according to claim 3, characterized in that, The support is a plate-shaped structure with an L-shaped cross-section. The support includes a base plate and a side plate. The side plate is vertically arranged on the upper part of the base plate. The side plate is provided with a circular mounting hole through which the output shaft passes and a connection hole for fixing the motor. The output shaft passes through the circular mounting hole and is movably connected to the V-shaped support plate.

7. The proportional electro-hydraulic dual-purpose pedal device according to claim 6, characterized in that, The base plate is provided with a fixing hole and an oil passage hole corresponding to the main valve core. There are two oil passage holes, which are respectively set to correspond to the oil inlet hole and the oil outlet hole. A sealing structure is provided between the two oil passage holes and the main valve core. The main valve core is bolted to the base plate.

8. The proportional electro-hydraulic dual-purpose pedal device according to claim 1, characterized in that, The handle includes a dial mounted on the handle and a control device that matches the dial.

9. The proportional electro-hydraulic dual-purpose pedal device according to claim 8, characterized in that, The control box includes a main control PCB board and a corresponding control system. The main control PCB board is equipped with a control circuit and a microprocessor connected to the control circuit. The control box is electrically connected to the handle.

Images