A forward and reverse driving grabber working device

Abstract

The present application relates to the field of agricultural machinery and engineering machinery, and specifically to a forward and reverse driving grabber operation device, which comprises a rotating platform assembly installed on a cab, the rotating platform assembly comprising a lower mounting seat, a upper mounting seat rotatably mounted on the lower mounting seat through bearings, a seat assembly installed on the upper mounting seat, an instrument desk, a steering wheel control assembly, a control grabber handle assembly, and a locking device assembly for locking the upper mounting seat in a forward or reverse position, the lower mounting seat being fixed on the cab floor. The present application can realize forward and reverse driving operation, and after the driving direction is switched, the driver does not need to change the operation habit, the front, rear, left and right operations of the handle are always consistent with the direction of the grabber action, effectively preventing misoperation and improving the operation safety. When the driver gets on or off the vehicle, the control grabber handle can also be rotated around the swing arm shaft to the back of the seat on both sides, reserving sufficient passing space for getting on and off the vehicle.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery and engineering machinery technology, specifically to a grabber operation device that can be driven in both forward and reverse directions. Background Technology

[0002] With the diversification of modern agricultural and engineering operations, more and more agricultural machinery needs to have forward and reverse driving capabilities to improve driving comfort and work efficiency. Existing bidirectional operation solutions on the market adopt a dual-operator layout, which occupies a large amount of equipment space. The operating mechanism is located above the cab or in the co-driver's seat, requiring frequent switching between driving and operating positions, resulting in low work efficiency and high safety risks. Separate rotating seat structures require the entire machine to be stopped before the operating direction can be switched. Although some models use a solution where the steering wheel and seat rotate as a whole, the structure is complex and the manufacturing cost is high. Summary of the Invention

[0003] The purpose of this invention is to provide a jacking machine operating device that can be driven in both forward and reverse directions, in order to solve the problems mentioned in the background art, which require frequent position changes for both driving and operation, and some models use a solution where the steering wheel and seat rotate as a whole, but the structure is complicated and the manufacturing cost is high.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A forward and reverse drivable grab crane operating device includes a rotating platform assembly installed in the cab. The rotating platform assembly includes a lower mounting base, an upper mounting base rotatably mounted on the lower mounting base via bearings, a seat assembly mounted on the upper mounting base, an instrument panel, a steering wheel control assembly, a grab crane operating handle assembly, and a locking device assembly for locking the upper mounting base in a forward or reverse position. The lower mounting base is fixed to the cab floor. The steering wheel control assembly includes a large transmission gear, a small transmission gear, a transmission shaft assembly, and a steering wheel. The large transmission gear is fixedly mounted on the lower mounting base via bearings. The transmission shaft assembly is installed inside the instrument panel. The steering wheel is mounted on the upper end of the transmission shaft assembly, and the small transmission gear meshing with the large transmission gear is mounted on the lower end of the transmission shaft assembly.

[0006] The control gripper operating handle assembly includes a handle fixing bracket, a handle mounting bracket, a control handle assembly, and a locking pin. The handle fixing bracket is mounted on an upper mounting base, the handle mounting bracket is rotatably mounted on the handle fixing bracket, the control handle assembly is mounted on the handle mounting bracket, and the locking pin is used to lock the handle mounting bracket in a predetermined working position.

[0007] The lower mounting base is equipped with a direction recognition sensor, and the upper mounting base is equipped with a sensor pressure plate. The sensor pressure plate cooperates with the direction recognition sensor. The grabber operating device also includes an electromagnetic reversing valve. The electromagnetic reversing valve is electrically connected to the signal output terminal of the direction recognition sensor and is connected in series in the hydraulic oil circuit between the steering gear and the steering cylinder. When the upper mounting base rotates to the reverse position, the sensor pressure plate triggers the sensor, and the direction recognition sensor outputs a switching signal. The electromagnetic reversing valve switches the hydraulic oil circuit according to the switching signal. The steering operation of the steering wheel is consistent with the steering direction of the vehicle's forward direction in both forward and reverse driving.

[0008] As a further description of the above technical solution:

[0009] The gear shift lever is internally mounted in the lower mounting base, bearing, and upper mounting base. The upper mounting base and all components mounted on it are arranged to rotate around the gear shift lever. When switching to forward or reverse driving, the gear shift lever is located directly in front of the seat assembly.

[0010] As a further description of the above technical solution:

[0011] The upper mounting base is provided with a locking limit groove, and a limit bolt is installed next to the locking limit groove; a locking device assembly is installed above the lower mounting base, and a locking limit pin is provided on the locking device assembly. The locking limit pin cooperates with the locking limit groove to lock the upper mounting base after it is rotated.

[0012] As a further description of the above technical solution:

[0013] The locking device assembly has a wire harness insertion hole at the front end and a dust cover in the middle.

[0014] As a further description of the above technical solution:

[0015] The handle mounting bracket and control handle assembly rotate around the swing arm axis of the handle fixing bracket. When the control handle assembly is working, the handle mounting bracket and control handle assembly are lifted upwards, and the locking pin automatically falls into the locking pin hole to fix the handle mounting bracket in the predetermined working position. When the control handle assembly is not working, the pull ring of the locking pin is pulled up to make the locking pin exit the locking pin hole, and the handle mounting bracket and control handle assembly rotate backwards to the retracted position on both sides of the rear of the seat assembly by their own gravity.

[0016] As a further description of the above technical solution:

[0017] The handle fixing bracket is also provided with a rotation limiting hole, and the handle mounting bracket is provided with a rotation limiting plate and a locking pin hole. The rotation limiting plate and the rotation limiting hole cooperate to limit the rotation angle of the handle mounting bracket.

[0018] As a further description of the above technical solution:

[0019] The locking device assembly is also provided with an elastic reset element, which is used to ensure that the locking limit pin always has a downward tendency to insert into the locking limit groove.

[0020] As a further description of the above technical solution:

[0021] The control handle is generally referred to as an electronically controlled proportional handle.

[0022] As a further description of the above technical solution:

[0023] It also includes a wiring harness, which is centrally located through a wiring harness insertion hole at the front end of the locking device assembly, and the wiring harness is connected to the vehicle electrical system using a spiral cable or a slip ring rotary connector.

[0024] As a further description of the above technical solution:

[0025] The gear shift lever passes through the lower mounting bracket and the upper mounting bracket and connects to the gearbox shift fork in the cab.

[0026] Compared with the prior art, the present invention provides a grabber operation device that can be driven in both forward and reverse directions, which has the following advantages:

[0027] 1. In this invention, when switching between forward and reverse directions during driving or operation, the locking limit pin on the locking device assembly is pulled up, causing the upper mounting seat and the lower mounting seat to be separated. Rotating the steering wheel or using the foot to control the seat rotation allows the upper mounting seat and all components mounted on it to rotate 180° around the gear shift lever and be locked in place. The gear shift lever is always in front of the seat assembly. After rotation, the electrical control switches, instruments, throttle, and control handle assembly are not affected by the forward and backward direction.

[0028] 2. The present invention, as needed, rotates and fixes the handle mounting bracket and control handle assembly, which can not only meet the work requirements, but also reserve sufficient passage space for getting on and off the vehicle. The overall structure is simple and compact, saving manufacturing costs.

[0029] 3. In this invention, the upper mounting base is equipped with a direction recognition sensor, which, in conjunction with the controller, automatically reverses the operation logic of the steering wheel. After switching to the reverse driving direction, the driver does not need to change his operating habits, and the steering wheel movement direction is consistent with the forward driving control, effectively preventing misoperation and improving operational safety. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0031] Figure 2 For the present invention Figure 1Schematic diagram of the structure after rotating 180°;

[0032] Figure 3 This is a schematic diagram of the steering wheel control assembly structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the control handle assembly for the grabber of the present invention;

[0034] Figure 5 This is a schematic diagram of the locking limit pin insertion into the locking limit groove structure of the present invention;

[0035] Figure 6 This is a schematic diagram of the reverse driving sensor structure of the present invention;

[0036] Figure 7 This is a schematic diagram of the hydraulic control principle of the forward driving steering system of the present invention;

[0037] Figure 8 This is a schematic diagram of the hydraulic control principle of the reverse driving steering system of the present invention.

[0038] Legend:

[0039] 1. Lower mounting bracket; 2. Bearing; 3. Upper mounting bracket; 4. Handlebar fixing bracket; 5. Handlebar mounting bracket; 6. Control handle assembly; 7. Locking pin; 8. Seat assembly; 9. Locking device assembly; 10. Limit bolt; 11. Dust cover; 12. Large transmission gear; 13. Small transmission gear; 14. Gear shift lever; 15. Wiring harness; 16. Instrument panel; 17. Electrical control switch; 18. Drive shaft assembly; 19. Instrument; 20. Hand throttle; 21. Steering wheel; 22. Locking limit pin; 23. Direction recognition sensor; 24. Steering gear; 25. Solenoid directional valve; 26. Steering cylinder; 27. Sensor pressure plate. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1:

[0042] Please see Figures 1-5This invention provides a jacking machine operating device that can be driven in both forward and reverse directions, including a rotating platform assembly installed in the cab. The rotating platform assembly includes a lower mounting base 1, an upper mounting base 3 rotatably mounted on the lower mounting base 1 via bearings 2, a seat assembly 8 mounted on the upper mounting base 3, an instrument panel 16, a steering wheel control assembly, a jacking machine operating handle assembly, and a locking device assembly 9 for locking the upper mounting base 3 in a forward or reverse position. The lower mounting base 1 is fixed to the cab floor. The steering wheel control assembly includes a large transmission gear 12, a small transmission gear 13, a transmission shaft assembly 18, and a steering wheel 21. The large transmission gear 12 is fixedly mounted on the lower mounting base 1 via bearings 2. The transmission shaft assembly 18 is installed inside the instrument panel 16. The steering wheel 21 is mounted on the upper end of the transmission shaft assembly 18, and the small transmission gear 13, which meshes with the large transmission gear 12, is mounted on the lower end of the transmission shaft assembly 18.

[0043] The control handle assembly for the grabber includes a handle fixing bracket 4, a handle mounting bracket 5, a control handle assembly 6, and a locking pin 7. The handle fixing bracket 4 is mounted on the upper mounting base 3, the handle mounting bracket 5 is rotatably mounted on the handle fixing bracket 4, the control handle assembly 6 is mounted on the handle mounting bracket 5, and the locking pin 7 is used to lock the handle mounting bracket 5 in a predetermined working position.

[0044] The lower mounting base 1 is equipped with a direction recognition sensor 23, and the upper mounting base 3 is equipped with a sensor pressure plate 27. The sensor pressure plate 27 cooperates with the direction recognition sensor 23. The grabber operating device also includes an electromagnetic reversing valve 25. The electromagnetic reversing valve 25 is electrically connected to the signal output terminal of the direction recognition sensor 23 and is connected in series in the hydraulic oil circuit between the steering gear 24 and the steering cylinder 26. When the upper mounting base 3 is rotated to the reverse position, the sensor pressure plate 27 triggers the sensor 23, and the direction recognition sensor 23 outputs a switching signal. The electromagnetic reversing valve 25 switches the hydraulic oil circuit according to the switching signal. The steering operation of the steering wheel 21 is consistent with the steering direction of the vehicle's forward direction when driving in both forward and reverse directions.

[0045] Specifically, such as Figure 1-2 As shown, the gear shift lever 14 is installed inside the lower mounting base 1, bearing 2, and upper mounting base 3. The upper mounting base 3 and all components mounted on it are rotatably arranged around the gear shift lever 14. When switching to forward or reverse driving, the gear shift lever 14 is always in front of the seat assembly 8, ensuring that the gear shift lever 14 remains fixed during the driving direction switching process. The gear shift lever 14 is always located in front of the driver, preventing it from shifting due to rotation, and realizing that the upper mounting base 3 can rotate smoothly 180° around the gear shift lever 14.

[0046] Specifically, such as Figure 5As shown, the upper mounting base 3 is provided with a locking limit groove, and a limit bolt 10 is installed next to the locking limit groove; a locking device assembly 9 is installed above the lower mounting base 1, and a locking limit pin 22 is provided on the locking device assembly 9. The locking limit pin 22 cooperates with the locking limit groove to lock the upper mounting base 3 after rotation, providing a reliable mechanical locking structure to ensure that the upper mounting base 3 can be fixed after rotating to the forward or reverse position, preventing the upper mounting base 3 from rotating accidentally during operation. The limit bolt 10 limits the rotation angle to avoid excessive rotation that could damage components or cause safety hazards.

[0047] Specifically, such as Figure 1 As shown, the front end of the locking device assembly 9 is provided with a wire harness insertion hole and the middle is provided with a dust cover 11. The dust cover 11 prevents dust and dirt from entering the interior of the locking device, extends its service life, and ensures the reliability of the locking mechanism under harsh working conditions.

[0048] Specifically, the handle mounting bracket 5 and the control handle assembly 6 rotate around the swing arm axis of the handle fixing bracket 4. When the control handle assembly 6 is working, the handle mounting bracket 5 and the control handle assembly 6 are lifted upwards, and the locking pin 7 automatically falls into the locking pin hole to fix the handle mounting bracket 5 in the predetermined working position. When the control handle assembly 6 is not working, the pull ring of the locking pin 7 is pulled up to make the locking pin 7 exit the locking pin hole. The handle mounting bracket 5 and the control handle assembly 6 rotate backwards to the retracted position on both sides of the rear of the seat assembly 8 by their own gravity. The retracted position makes way for the driver to get in and out of the vehicle. It retracts automatically by gravity without manual reset, which is simple to operate. The locking pin 7 locks automatically to ensure that the handle is stable and does not wobble when working.

[0049] Specifically, the handle fixing bracket 4 is also provided with a rotation limiting hole, and the handle mounting bracket 5 is provided with a rotation limiting plate and a locking pin hole. The rotation limiting plate and the rotation limiting hole cooperate to limit the rotation angle of the handle mounting bracket 5, accurately limiting the rotation angle range of the handle mounting bracket 5 to avoid over-rotation or under-rotation. The locking pin hole cooperates with the locking pin 7 to ensure accurate and reliable locking and prevent the handle from falling accidentally during operation.

[0050] Specifically, the locking device assembly 9 is also equipped with an elastic reset element. This elastic reset element is used to ensure that the locking limit pin 22 always has a downward tendency to insert into the locking limit groove. After rotating into place, no manual operation is required, and the locking pin 7 automatically springs into the locking groove, simplifying the operation steps and avoiding accidental rotation of the upper mounting base due to forgetting to manually lock, thus improving safety.

[0051] Specifically, the control handle assembly 6 is an electronically controlled proportional handle. The control handle assembly 6 can output a continuous proportional signal to achieve stepless adjustment of the grabber's operating speed or flow rate, which is more precise than the operation of a switch-type handle.

[0052] Specifically, such as Figure 1As shown, it also includes a wiring harness 15, which is centrally located through the wiring harness insertion hole at the front end of the locking device assembly 9. The wiring harness 15 is connected to the vehicle electrical system using a spiral cable or a slip ring rotary connector, which solves the problem of the wiring harness 15 getting tangled and broken during the ±180° rotation of the rotating platform assembly. The spiral cable or slip ring rotary connector ensures continuous power supply and signal transmission, improving the reliability and durability of the electrical system.

[0053] Specifically, the gear shift lever 14 passes through the lower mounting base 1 and the upper mounting base 3 and connects to the gearbox shift fork in the cab, ensuring that the gear shift lever 14 is fixed while the upper mounting base 3 can rotate freely, thus decoupling the gear shifting operation from the function of the rotating platform.

[0054] Working principle:

[0055] The process of switching between forward and reverse driving is as follows:

[0056] When there is no need to change the driving direction, the locking limit pin 22 on the locking device assembly 9 is inserted into the locking limit groove of the upper mounting seat 3, so that the upper mounting seat 3 and the components installed on the upper mounting seat 3 are locked and cannot be rotated. A spring can be fixedly installed on the upper end of the locking limit pin 22. The spring keeps the locking limit pin 22 inserted downward into the locking limit groove of the upper mounting seat 3. The upper end of the locking limit pin 22 is provided with a pull ring. Pulling up the pull ring can overcome the spring force and make the locking limit pin 22 exit the locking limit groove.

[0057] When it is necessary to change the driving direction, pull up the locking limit pin 22 to unlock the upper mounting seat 3 from the lower mounting seat 1. Rotate the steering wheel 21 to drive the transmission pinion 13 to rotate. Since the transmission gear 12 is fixed on the lower mounting seat 1, the transmission pinion 13 will revolve around the transmission gear 12 while rotating on its own axis, causing the upper mounting seat 3 and all the components mounted on it to rotate 180° around the gear lever 14. During the rotation, the input shaft of the steering gear 24 is separated from the transmission gear 12 or relatively stationary through the clutch mechanism or an independent universal joint drive shaft. Therefore, the steering wheel does not move, and only the rotation platform assembly rotates. After the rotation platform assembly is in position, the locking limit pin 22 automatically locks. The rotation of the steering wheel 21 is transmitted to the steering gear 24 through the connecting mechanism of the transmission pinion 13, the transmission gear 12, and the steering gear 24, such as the universal joint drive shaft, to achieve normal steering.

[0058] During rotation, the locking limit pin 22 can be released. When the upper mounting seat 3 rotates to the corresponding driving direction, the locking limit pin 22 automatically inserts into the locking limit groove of the upper mounting seat 3 to achieve locking limit. Each of the upper mounting seat 3 has a limit bolt 10 installed next to the locking limit groove to limit the rotation angle of the upper mounting seat 3 and prevent the upper mounting seat 3 from rotating excessively.

[0059] The lower end of the gear shift lever 14 passes through the lower mounting seat 1 and the upper mounting seat 3 and connects to the gearbox shift fork in the cab, so that the upper mounting seat 3 can rotate freely around the gear shift lever 14, while the gear shift lever 14 remains fixed and does not rotate, ensuring that the gear shifting operation is not affected by rotation.

[0060] When switching to forward or reverse driving, the gear shift lever 14 is always in front of the seat assembly 8. When switching driving positions, the electrical control switch 17, instrument 19, hand throttle 20 and control handle assembly 6 also rotate 180° with the upper mounting base 3. After rotation, they are not affected by the front and rear directions and can be used normally.

[0061] All electrical wiring harnesses 15 are connected to the vehicle electrical system via the wiring harness insertion hole at the front end of the locking device assembly 9, using spiral cables or slip ring rotary connectors, ensuring that the wiring harnesses 15 are not pulled off or tangled within the ±180° rotation range of the upper mounting bracket 3.

[0062] The transmission path of the steering wheel controlling the steering gear 24 is as follows:

[0063] like Figure 3 As shown, the steering wheel control assembly includes: a steering wheel 21, a drive shaft assembly 18, a pinion gear 13, a gear 12, and a bearing 2. The upper part of the drive shaft assembly 18 is bolted to the inside and above the instrument panel 16, and the lower part of the drive shaft assembly 18 is bolted to the upper mounting base 3. The steering wheel 21 is mounted on top of the drive shaft assembly 18, and the pinion gear 13 is connected to the bottom of the drive shaft assembly 18. The pinion gear 13 meshes with the gear 12 mounted on the lower mounting base 1, and the bearing 2 is installed inside the gear 12, allowing the gear 12 and the lower mounting base 1 to work independently.

[0064] When the upper mounting bracket 3 is locked, rotating the steering wheel 21 on the instrument panel 16 drives the drive shaft assembly 18 to rotate, and the small drive gear 13 rotates accordingly, driving the large drive gear 12 to rotate. The large drive gear 12 is coaxially fixed with the input shaft of the steering gear 24 or connected through a universal drive shaft. The rotation of the large drive gear 12 directly drives the steering gear 24 to work, thereby controlling the vehicle's steering.

[0065] An orientation recognition sensor is installed on the upper mounting base 3. Specifically, the sensor can be an angle sensor, a magnetic proximity switch, or a micro switch. The orientation recognition sensor is installed between the upper mounting base 3 and the lower mounting base 1 to detect the rotational orientation of the upper mounting base 3 relative to the lower mounting base 1.

[0066] When the driver rotates the upper mounting seat 3 180° from the forward driving position to the reverse driving position, the locking limit pin 22 falls into the reverse locking limit groove. At the same time, the sensor pressure plate 27 on the upper mounting seat 3 rotates with the upper mounting seat 3 to the position corresponding to the direction recognition sensor 23 and triggers the direction recognition sensor 23, connecting the internal circuit of the direction recognition sensor 23. The direction recognition sensor 23 then sends a direction switching signal to the electromagnet of the solenoid directional valve 25. The solenoid directional valve 25 switches the hydraulic oil circuit according to the switching signal, automatically controlling the left and right movement of the steering wheel 21. The logic is inverted to ensure that the operation of reverse driving and forward driving is always consistent. When driving forward, the steering wheel 21 is turned to the left, and the oil outlet L of the steering gear 24 outputs hydraulic oil. The hydraulic oil enters from the P port and exits from the A port of the solenoid directional valve 25 and is transmitted to the rod chamber of the steering cylinder 26, causing the front axle to turn left in the forward direction. When driving in reverse, the steering wheel 21 is turned to the left, and the oil outlet L of the steering gear 24 outputs hydraulic oil. The hydraulic oil enters from the P port and exits from the B port of the solenoid directional valve 25 and is transmitted to the rodless chamber of the steering cylinder 26, causing the rear axle to turn left in the forward direction.

[0067] Example 2:

[0068] This embodiment focuses on describing the structure of the control handle assembly for the grabber and its operation when getting on and off the machine.

[0069] The control handle assembly for the grabber includes: handle fixing bracket 4, handle mounting bracket 5, control handle assembly 6 and locking pin 7. The control handle assembly 6 is an electronically controlled proportional handle. Its output signal is processed by the controller to drive the hydraulic multi-way valve of the grabber. The controller can be an on-board controller, such as an ECU or a special controller for agricultural machinery.

[0070] The handle fixing bracket 4 is bolted to the left and right sides of the upper mounting base 3, that is, located on both sides of the seat assembly 8. The handle fixing bracket 4 is provided with a swing arm shaft and a rotation limit hole. The top of the handle fixing bracket 4 is equipped with a locking pin 7. The handle mounting bracket 5 is installed on the swing arm shaft of the handle fixing bracket 4. The control handle assembly 6 is installed above the handle mounting bracket 5. The handle mounting bracket 5 is provided with a rotation limit plate and a locking pin hole.

[0071] The operation process of this embodiment is as follows: the handle mounting bracket 5 and the control handle assembly 6 can rotate back and forth around the swing arm axis of the handle fixing bracket 4;

[0072] When the control handle assembly 6 needs to operate, lift the handle mounting bracket 5 and the control handle assembly 6. The locking pin 7 automatically locks into the locking pin hole of the handle mounting bracket 5. A rotation limit is provided between the handle fixing bracket 4 and the handle mounting bracket 5, and the locking pin 7 can accurately lock the handle mounting bracket 5 in the designated working position. The operator can then operate the control handle assembly 6 normally to perform grabbing operations.

[0073] When the control handle assembly 6 is not in use, or when the driver needs to get in or out of the vehicle, pull up the ring of the locking pin 7. The locking pin 7 disengages from the locking pin hole of the handle mounting bracket 5. The handle mounting bracket 5 and the control handle assembly 6 rotate backward to the rear sides of the seat assembly 8 under their own weight. There is a rotation limit between the handle fixing bracket 4 and the handle mounting bracket 5. The handle mounting bracket 5 and the control handle assembly 6 stop rotating after rotating backward to a certain position. The handle fixing bracket 4 also has a locking pin hole in the retracted position. The locking pin 7 automatically falls into the locking pin hole under the action of spring force to achieve reliable locking. Since there are no handles obstructing the sides of the seat assembly 8, sufficient passage space is reserved for the driver to get in and out of the vehicle.

[0074] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grabber operating device capable of forward and reverse operation, characterized in that, The system includes a rotating platform assembly installed in the cab, comprising a lower mounting base (1), an upper mounting base (3) rotatably mounted on the lower mounting base (1) via bearings (2), a seat assembly (8) mounted on the upper mounting base (3), an instrument panel (16), a steering wheel control assembly, a control handle assembly for the grabber, and a locking device assembly (9) for locking the upper mounting base (3) in a forward or reverse position. The lower mounting base (1) is fixed to the cab floor. The steering wheel control assembly includes a large transmission gear (12), a small transmission gear (13), a drive shaft assembly (18), and a steering wheel (21). The large transmission gear (12) is fixedly mounted on the lower mounting base (1) via bearings (2). The drive shaft assembly (18) is installed inside the instrument panel (16). The steering wheel (21) is mounted on the upper end of the drive shaft assembly (18), and the small transmission gear (13) meshing with the large transmission gear (12) is mounted on the lower end of the drive shaft assembly (18). The control gripper operating handle assembly includes a handle fixing bracket (4), a handle mounting bracket (5), a control handle assembly (6), and a locking pin (7). The handle fixing bracket (4) is mounted on the upper mounting base (3), the handle mounting bracket (5) is rotatably mounted on the handle fixing bracket (4), the control handle assembly (6) is mounted on the handle mounting bracket (5), and the locking pin (7) is used to lock the handle mounting bracket (5) in a predetermined working position. The lower mounting base (1) is provided with a direction recognition sensor (23), and the upper mounting base (3) is provided with a sensor pressure plate (27). The sensor pressure plate (27) cooperates with the direction recognition sensor (23). The grabber operation device also includes an electromagnetic reversing valve (25). The electromagnetic reversing valve (25) is electrically connected to the signal output terminal of the direction recognition sensor (23) and connected in series in the hydraulic oil circuit between the steering gear (24) and the steering cylinder (26). When the upper mounting base (3) rotates to the reverse position, the sensor pressure plate (27) triggers the sensor (23). The direction recognition sensor (23) outputs a switching signal. The electromagnetic reversing valve (25) switches the hydraulic oil circuit according to the switching signal. The steering operation of the steering wheel (21) is consistent with the steering direction of the vehicle's forward direction when driving in both forward and reverse directions.

2. The grabber operating device capable of forward and reverse operation according to claim 1, characterized in that: The gear shift lever (14) is installed inside the lower mounting base (1), bearing (2) and upper mounting base (3). The upper mounting base (3) and all components installed on the upper mounting base (3) are arranged to rotate around the gear shift lever (14). When switching to forward or reverse driving, the gear shift lever (14) is located in front of the seat assembly (8).

3. The grabber operating device capable of forward and reverse operation according to claim 2, characterized in that: The upper mounting base (3) is provided with a locking limit groove, and a limit bolt (10) is installed next to the locking limit groove; a locking device assembly (9) is installed above the lower mounting base (1), and a locking limit pin (22) is provided on the locking device assembly (9). The locking limit pin (22) cooperates with the locking limit groove to lock the upper mounting base (3) after rotation.

4. The grabber operating device capable of forward and reverse operation according to claim 3, characterized in that: The locking device assembly (9) has a wire harness insertion hole at the front end and a dust cover (11) in the middle.

5. A grabber operating device capable of forward and reverse operation according to claim 4, characterized in that: The handle mounting bracket (5) and the control handle assembly (6) rotate around the swing arm axis of the handle fixing bracket (4); when the control handle assembly (6) is working, the handle mounting bracket (5) and the control handle assembly (6) are lifted upwards, and the locking pin (7) automatically falls into the locking pin hole to fix the handle mounting bracket (5) in the predetermined working position; when the control handle assembly (6) is not working, the pull ring of the locking pin (7) is pulled up to make the locking pin (7) exit the locking pin hole, and the handle mounting bracket (5) and the control handle assembly (6) rotate backwards to the retracted position on both sides of the back of the seat assembly (8) by their own gravity.

6. A grabber operating device capable of forward and reverse operation according to claim 5, characterized in that: The handle fixing bracket (4) is also provided with a rotation limiting hole, and the handle mounting bracket (5) is provided with a rotation limiting plate and a locking pin hole. The rotation limiting plate and the rotation limiting hole cooperate to limit the rotation angle of the handle mounting bracket (5).

7. A grabber operating device capable of forward and reverse operation according to claim 6, characterized in that: The locking device assembly (9) is also provided with an elastic reset element, which is used to ensure that the locking limit pin (22) always has a downward tendency to insert into the locking limit groove.

8. A grabber operating device capable of forward and reverse operation according to claim 7, characterized in that: The control handle assembly (6) is an electronically controlled proportional handle.

9. A grabber operating device capable of forward and reverse operation according to claim 8, characterized in that: It also includes a wiring harness (15) which is centrally located through a wiring harness insertion hole at the front end of the locking device assembly (9) and is connected to the vehicle electrical system using a spiral cable or a slip ring rotary connector.

10. A grabber operating device capable of forward and reverse operation according to claim 9, characterized in that: The gear shift lever (14) passes through the lower mounting seat (1) and the upper mounting seat (3) and is connected to the gearbox shift fork in the cab.

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