A multi-way valve operating mechanism

Abstract

The present invention belongs to the field of control handles, specifically to a multi-way valve operating mechanism, comprising a U-shaped mounting base, a fixed shaft mounted on the mounting base, and a plurality of operating handles mounted on the fixed shaft. The operating handles include a control handle rotatably mounted on the fixed shaft and a reset mechanism mounted on the fixed shaft for returning the control handles to their initial positions. A Hall effect sensor is provided on the front side of the mounting base, with each control handle corresponding to one Hall effect sensor. The Hall effect sensor is connected to the multi-way valve via a power harness. A rotating card is connected to the rotating shaft of the Hall effect sensor. A cylinder II is provided on the front side of the control handle, which is rotatably connected to the rotating card. While meeting ergonomic requirements, the mechanism is more cost-effective than a control handle integrated into a seat.

Description

Technical Field

[0001] The invention belongs to the field of control handles, and in particular relates to a multi-way valve operating mechanism. Background Art

[0002] The multi-way valve is an essential component of forklifts. The lifting, lowering, forward and backward tilting of the forklift mast, as well as other movements, are all controlled by the multi-way valve's operating handle. At the same time, the forklift also requires frequent forward and reverse switching. Currently, the multi-way valve operating mechanism in counterbalanced forklifts has three common placement options: Option 1, mechanically controlled by placing it on the front panel of the cab; Option 2, mechanically controlled by placing it on the right side of the seat; Option 3, electronically controlled by placing the multi-way valve below the cab and integrating the operating handle into the seat. The forward and reverse switches are often separated from the multi-way valve's operating handle, requiring frequent switching of the right hand during operation.

[0003] For electric counterbalanced forklifts, the battery under the seat requires frequent replacement, requiring the battery cover to be flipped up. Ergonomically, the handle needs to be close to the seat, which interferes with vertical battery replacement. Therefore, Options 1 and 3 were chosen. However, with Option 1, the joystick and multi-way valve are connected to the right front side of the cab via a pull rod. This requires reaching forward to operate, resulting in high operating force and fatigue, and large hand movements when switching directions. While Option 3 addresses the shortcomings of Option 1, the integration of the control mechanism and seat takes up significant cab space, making it difficult for the driver to exit from the right side and resulting in higher costs. Summary of the Invention

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a multi-way valve operating mechanism which, while meeting ergonomic requirements, occupies less space in the cab and has lower costs than the operating handle integrated in the seat, based on solution three.

[0005] The present invention is achieved through the following technical solution: a multi-way valve operating mechanism, including a U-shaped mounting base, a fixed shaft installed on the mounting base, a plurality of operating handles installed on the fixed shaft, the operating handles including an operating handle rotatably arranged on the fixed shaft and a reset mechanism arranged on the fixed shaft for returning the operating handle to an initial position, a Hall sensor is provided on the front side of the mounting base, each operating handle corresponds to one of the Hall sensors, the Hall sensor is connected to the multi-way valve through a power harness, a rotating card is connected to the rotating shaft of the Hall sensor, a cylinder II is provided on the front side of the operating handle, and cylinder II is rotatably connected to the rotating card.

[0006] In some embodiments, the reset mechanism includes a tension spring clip, a tension spring and a limit shaft, the limit shaft is located below the fixed shaft, the reset mechanism includes two tension spring clips, the two tension spring clips are rotatably arranged on the fixed shaft, and the two tension spring clips are symmetrically arranged about the fixed axis, the two tension spring clips are connected by a tension spring below the limit shaft, and a cylinder I is provided on the side of the operating handle, and the cylinder I is between the two tension spring clips located above the fixed shaft.

[0007] In some embodiments, a limit plate is provided on the front side of the mounting base, and a limit protrusion facing the operating handle is provided on the upper and lower sides of the limit plate. The operating handle cooperates with the limit protrusions on the upper and lower sides of the limit plate to limit the forward and backward rotation angles of the operating handle.

[0008] In some embodiments, the limiting plate is provided with a plurality of openings, the Hall sensor is fixed to the outer side of the limiting plate through a mounting plate, and the rotating shaft of the Hall sensor extends from the openings on the limiting plate to the mounting base.

[0009] In some embodiments, the rotating clamp is a Z-shaped bent plate, one end of the rotating clamp is fixed to the rotating shaft of the Hall sensor through a nut, and the other end of the rotating clamp is provided with an oblong hole, and the cylinder II is clamped into the oblong hole of the rotating clamp.

[0010] In some embodiments, a reversing switch is integrated into the operating handle of one of the operating handles.

[0011] In some embodiments, a plastic card block is also included, which includes two symmetrical card plates. The operating handle is rotatably mounted on a fixed shaft through a sleeve. The two symmetrical card plates are clamped on the sleeve of the operating handle. The two symmetrical card plates are fixed by bolts below the sleeve, and the two symmetrical card plates are fixed by bolts with springs above the sleeve.

[0012] The beneficial effects of the present invention are: compared with traditional mechanical structures, the operating force of the present invention is adjustable and occupies a very small space, which is in line with ergonomics and reduces operating fatigue; compared with the operating handle integrated in the seat, it occupies less space in the cab and has lower costs. The reversing switch integrated on the side near the seat can reduce the moving distance of the driver's hand and reduce fatigue. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a perspective schematic diagram of the front side angle of the present invention;

[0014] Figure 2 It is a three-dimensional schematic diagram of the rear side angle of the present invention;

[0015] Figure 3 It is a side schematic diagram of the present invention;

[0016] Figure 4 This is a schematic diagram of the use of the plastic pallet of the present invention;

[0017] In the figure, 1. Cylinder I, 2. Mounting base, 3. Reversing switch, 4. Operating handle I, 5. Fixed shaft, 6. Limit shaft, 7. Mounting plate, 8. Hall sensor, 9. Operating handle II, 10. Spacer, 11. Tension spring clamp, 12. Tension spring, 13. Plastic clamp, 14. Spring, 15. Bolt, 16. Rotating clamp, 17. Limit plate, 18. Cylinder II, 19. Sleeve. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and examples.

[0019] like Figures 1 to 4 As shown, a multi-way valve operating mechanism includes a U-shaped mounting base 2, which serves as a mounting platform for various operating components. A fixed shaft 5 is mounted on the mounting base 2, and the fixed shaft 5 is fixed relative to the mounting base 2. A plurality of operating handles are mounted on the fixed shaft 5, such as Figure 1 and Figure 2 As shown, two operating handles are provided on the mounting base 2, and the number of operating handles can be increased according to the use requirements of the forklift. The operating handle includes an operating handle rotatably provided on the fixed shaft 5 and a reset mechanism provided on the fixed shaft 5 for returning the operating handle to its initial position. A Hall sensor 8 is provided on the front side of the mounting base 2, and each operating handle corresponds to one Hall sensor 8. The Hall sensor 8 is connected to the multi-way valve through a power harness. A rotating clamp 16 is connected to the rotating shaft of the Hall sensor 8. A cylinder II 18 is provided on the front side of the operating handle, and the cylinder II 18 is rotatably connected to the rotating clamp 16. The operating handle is initially in the initial position under the restriction of the reset mechanism. The operator operates the operating handle to rotate forward or backward according to the action of the working device of the forklift. When the operator releases the operating handle, the operating handle returns to its initial position under the action of the reset mechanism. Rotating the joystick forward or backward drives the rotating plate 16 counterclockwise or clockwise via cylinder II 18. Rotating the rotating plate 16 rotates the shaft of the Hall effect sensor 8, thereby changing the output voltage of the Hall effect sensor 8. This change in output voltage controls the opening angle of the electro-hydraulic proportional multi-way valve, thereby controlling the hydraulic operation. When the joystick is not being operated, it is in its initial position. The Hall effect sensor 8 contacted by the joystick is at a normal potential, and the electro-hydraulic proportional multi-way valve is in its normal position, closing its valve port.

[0020] Various structural forms can be used to implement the aforementioned destination reset mechanism. In some embodiments, the reset mechanism includes a tension spring clip 11, a tension spring 12, and a limit shaft 6. The limit shaft 6 is located below the fixed shaft 5. The reset mechanism includes two tension spring clips 11, rotatably mounted on the fixed shaft 5 and symmetrically arranged about the fixed shaft 5. The two tension spring clips 11 are connected by a tension spring 12 below the limit shaft 6. A cylinder I1 is provided on the side of the joystick, located between the two tension spring clips 11 above the fixed shaft 5. When the joystick moves forward or backward, the corresponding tension spring clip 11 rotates about the fixed shaft 5. When the operator releases the joystick, the tension spring 12 causes the tension spring clip 11, which has deviated from its initial position with the joystick, to rotate in the opposite direction and return to its initial position. As the tension spring clips 11 return to their initial position, the joystick also returns to its initial position via the cylinder I1. The limiting shaft 6 limits the tension spring clamp 11. When the tension spring clamp 11 moves from the deviated position toward the initial position, when the tension spring clamp 11 touches the limiting shaft 6, the tension spring clamp 11 returns to the initial position.

[0021] In some embodiments, a limit plate 17 is provided on the front side of the mounting base 2, and a limit protrusion facing the operating handle is provided on the upper and lower sides of the limit plate 17. The operating handle cooperates with the limit protrusions on the upper and lower sides of the limit plate 17 to limit the forward and backward rotation angles of the operating handle, that is, there is a maximum rotation angle for the operating handle to rotate forward and backward, thereby preventing the operating handle from rotating without restriction.

[0022] In some embodiments, the limiting plate 17 is provided with a plurality of openings, and the Hall sensor 8 is fixed to the outer side of the limiting plate 17 through the mounting plate 7, and the mounting plate 7 and the limiting plate 17 are fixed with bolts. The rotating shaft of the Hall sensor 8 extends from the opening on the limiting plate 17 into the mounting base 2, and the rotating shaft of the Hall sensor 8 is transmission-connected with the rotating clamping plate 16 in the mounting base 2. Specifically, the rotating clamping plate 16 is a Z-shaped bent plate, one end of the rotating clamping plate 16 is fixed to the rotating shaft of the Hall sensor 8 by a nut, and the other end of the rotating clamping plate 16 is provided with an oblong hole, and the cylinder II 18 is inserted into the oblong hole of the rotating clamping plate 16. When the operating handle rotates forward or backward, the rotating clamping plate 16 is driven to rotate counterclockwise or clockwise through the cylinder II 18.

[0023] In some embodiments, one of the operating handles is integrated with a reversing switch 3, specifically, Figure 1 and Figure 2As shown, two operating handles are provided on the mounting base 2. The operating handles of the two operating handles are operating handle I4 and operating handle II9 respectively. A reversing switch 3 is provided on the operating handle I4. The operating handle II9 is ​​identical to the operating handle I4, except that it does not have the reversing switch 3. The reversing switch 3 is provided on the operating handle I4 so that the operator can switch the forklift forward and backward without moving his hands.

[0024] A spacer sleeve 10 is provided on the fixed shaft 5. The function of the spacer sleeve 10 is to limit the axial movement of the operating handle.

[0025] In some embodiments, as Figure 4 As shown, it also includes a plastic block 13, which includes two symmetrical card plates. The operating handle is rotatably mounted on the fixed shaft 5 through a sleeve 19. The two symmetrical card plates are clamped on the sleeve 19 of the operating handle. The two symmetrical card plates are fixed below the sleeve 19 by bolts ( Figure 4 (The bolt is not shown in the figure). Bolts 15, fitted with springs 14, secure the two symmetrical clamps above sleeves 19. Rotating bolts 15 apply preload to springs 14, which in turn preloads sleeves 19 of the control handle via plastic clamps 13. This design allows for customized adjustment of the control handle's operating force.

[0026] In summary, the present invention can meet all the requirements of a forklift for operating the working device, does not affect the operator's getting off the vehicle from the operating lever side, and does not require frequent movement of the right hand position to solve the problems caused by the original arrangement.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A multi-way valve operating mechanism, characterized in that: The invention comprises a U-shaped mounting base (2), a fixed shaft (5) is mounted on the mounting base (2), a plurality of operating handles are mounted on the fixed shaft (5), the operating handles comprising a manipulation handle rotatably mounted on the fixed shaft (5) and a reset mechanism mounted on the fixed shaft (5) for returning the manipulation handle to an initial position, a Hall sensor (8) is provided on the front side of the mounting base (2), each manipulation handle corresponds to one Hall sensor (8), the Hall sensor (8) is connected to the multi-way valve via a power harness, a rotating card (16) is connected to the rotating shaft of the Hall sensor (8), a cylinder II (18) is provided on the front side of the manipulation handle, and the cylinder II (18) is rotatably connected to the rotating card (16).

2. A multi-way valve operating mechanism according to claim 1, characterized in that: The reset mechanism includes a tension spring clamp (11), a tension spring (12) and a limiting shaft (6), the limiting shaft (6) is located below the fixed shaft (5), and the reset mechanism includes two tension spring clamps (11), the two tension spring clamps (11) are rotatably arranged on the fixed shaft (5), and the two tension spring clamps (11) are symmetrically arranged about the fixed shaft (5), the two tension spring clamps (11) are connected by the tension spring (12) below the limiting shaft (6), and a cylinder I (1) is provided on the side of the operating handle, and the cylinder I (1) is between the two tension spring clamps (11) located above the fixed shaft (5).

3. The multi-way valve operating mechanism according to claim 1, characterized in that: A limit plate (17) is provided on the front side of the mounting base (2), and a limit protrusion facing the operating handle is provided on the upper and lower sides of the limit plate (17). The operating handle cooperates with the limit protrusions on the upper and lower sides of the limit plate (17) to limit the forward and backward rotation angles of the operating handle.

4. A multi-way valve operating mechanism according to claim 3, characterized in that: The limiting plate (17) is provided with a plurality of openings, the Hall sensor (8) is fixed to the outside of the limiting plate (17) via the mounting plate (7), and the rotating shaft of the Hall sensor (8) extends from the openings on the limiting plate (17) into the mounting base (2).

5. A multi-way valve operating mechanism according to claim 1 or 4, characterized in that: The rotating clamping plate (16) is a Z-shaped bent plate. One end of the rotating clamping plate (16) is fixed to the rotating shaft of the Hall sensor (8) through a nut. The other end of the rotating clamping plate (16) is provided with an oblong hole. The cylinder II (18) is clamped into the oblong hole of the rotating clamping plate (16).

6. The multi-way valve operating mechanism according to claim 1, characterized in that: A reversing switch (3) is integrated into the operating handle of one of the operating handles.

7. The multi-way valve operating mechanism according to claim 1, characterized in that: The invention also includes a plastic card block (13), which includes two symmetrical card plates. The operating handle is rotatably mounted on the fixed shaft (5) through a sleeve. The two symmetrical card plates are clamped on the sleeve of the operating handle. The two symmetrical card plates are fixed below the sleeve by bolts, and the two symmetrical card plates are fixed above the sleeve by bolts (15) mounted with springs (14).

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