Forklift steering wheel mechanism

Abstract

The utility model discloses a kind of forklift steering wheel mechanisms, including steering wheel, steering wheel drive module, gear handle, gear handle drive module and switching module, the steering wheel drive module includes first driving part and transmission mechanism, the main shaft of the steering wheel is rotated by the transmission mechanism when the first driving part operates, the gear handle drive module includes second driving part and elastic limiting piece, the gear handle is moved to shift gear by the elastic limiting piece when the second driving part operates, the switching module is used to start / close the first driving part and second driving part. The forklift steering wheel mechanism of the utility model can switch manual or automatic operation steering wheel and shift gear at any time, greatly reduce cost, improve convenience.

Description

Technical Field

[0001] This utility model relates to the field of forklift steering technology, specifically to a forklift steering wheel mechanism. Background Technology

[0002] The current technology for automated forklift equipment is complex to switch between manual and automatic modes at any time, and the retrofit cost is high. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, this utility model provides a forklift steering wheel mechanism that allows for switching between manual and automatic steering wheel operation and gear shifting at any time, greatly reducing costs and improving convenience.

[0004] The technical solution adopted by this utility model to solve its technical problem is: A forklift steering wheel mechanism includes a steering wheel, a steering wheel drive module, a gear lever, a gear lever drive module, and a switching module. The steering wheel drive module includes a first drive component and a transmission mechanism. When the first drive component is running, it drives the main shaft of the steering wheel to rotate through the transmission mechanism. The gear lever drive module includes a second drive component and an elastic limiting component. When the second drive component is running, it drives the gear lever to move through the elastic limiting component to perform gear shifting. The switching module is used to start / stop the first drive component and the second drive component.

[0005] As a further improvement to the above technical solution, the first driving component includes a first servo motor and a reducer. The first servo motor is a 200W servo motor, and the reducer has a reduction ratio of 10.

[0006] As a further improvement to the above technical solution, the encoder of the first servo motor adopts a 2500-line incremental encoder.

[0007] As a further improvement to the above technical solution, the transmission mechanism includes two synchronous pulleys and a synchronous belt connecting the two synchronous pulleys, with the two synchronous pulleys respectively fixedly sleeved on the output shaft of the reducer and the main shaft of the steering wheel.

[0008] As a further improvement to the above technical solution, the second driving component includes a second servo motor, a lead screw module, and a fixed plate. The spindle of the second servo motor is connected to the lead screw of the lead screw module, the nut of the lead screw module is connected to the fixed plate, and the elastic limiting component is mounted on the fixed plate.

[0009] As a further improvement to the above technical solution, the elastic limiting member includes two elastic posts, which are arranged along the shifting direction of the gear lever. The gears of the gear lever include forward, reverse and neutral. When the gear is in neutral, the gear lever is located between the two elastic posts.

[0010] As a further improvement to the above technical solution, the elastic column includes a pin and a spring. The fixing plate is provided with a mounting hole, the pin is slidably connected in the mounting hole, and the spring is connected between the pin and the mounting plate. The spring force direction is consistent with the axial direction of the mounting hole.

[0011] As a further improvement to the above technical solution, the elastic column also includes a screw, which is threaded into the mounting hole, and the spring is connected between the screw and the ejector pin.

[0012] The beneficial effects of this utility model are: the main shaft of the steering wheel is driven to rotate by the first driving component and the transmission mechanism, thereby realizing the automatic steering effect of the forklift. Then, the gear lever is driven to move by the second driving component to realize the automatic gear shifting effect. In addition, the driver can also manually turn the steering wheel and shift gears after turning off the first driving component and the second driving component to realize the manual and automatic driving modes of the forklift. It has the advantages of simple structure, low cost and strong adaptability. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of a forklift steering wheel mechanism according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a forklift steering wheel mechanism according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a top view of a gear shift drive module in a forklift steering wheel mechanism according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of the gear shift drive module in a forklift steering wheel mechanism according to an embodiment of this utility model; Figure 5 This is an exploded view of the gear shift drive module in a forklift steering wheel mechanism according to an embodiment of this utility model.

[0015] Reference numerals: 100, Steering wheel; 200, Steering wheel drive module; 210, First servo motor; 220, Reducer; 230, First synchronous pulley; 240, Synchronous belt; 250, Second synchronous pulley; 300, Gear lever; 400, Gear lever drive module; 410, Second servo motor; 411, Motor mounting plate; 420, Lead screw module; 421, Lead screw; 422, Nut; 423, Lead screw seat; 424, Slide rail; 425, Slider; 430, Fixing plate; 431, Mounting hole; 500, Elastic limiter / 510, Elastic post; 511, Ejector pin; 512, Spring; 513, Screw. Detailed Implementation

[0016] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. Detachable connections can use screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0017] Reference Figure 1 , Figure 2 A forklift steering wheel mechanism includes a steering wheel 100, a steering wheel drive module 200, a gear lever 300, a gear lever drive module 400, and a switching module. The steering wheel drive module 200 includes a first drive component and a transmission mechanism. When the first drive component is running, it drives the main shaft of the steering wheel 100 to rotate through the transmission mechanism. The gear lever drive module 400 includes a second drive component and an elastic limiting component 500. When the second drive component is running, it drives the gear lever 300 to move through the elastic limiting component 500 to shift gears. The switching module is used to start / stop the first drive component and the second drive component.

[0018] Specifically, the first driving component includes a first servo motor 210 and a reducer 220. The first servo motor 210 is a 200W servo motor with an output torque of 0.63 N·m. The reducer 220 has a reduction ratio of 10. The encoder of the first servo motor 210 is a 2500-line incremental encoder. By inputting the encoder signal of the motor with a frequency multiplied by 4 through the driver, the positioning accuracy of the first servo motor 210 is ±1 / (2500×4), which is ±360 / (2500×4) = ±0.036 degrees in terms of angle. Therefore, high-precision automatic steering wheel turning 100 can be achieved.

[0019] The software and hardware that control the first servo motor 210 through the autonomous driving module are not innovative points of this utility model and can be achieved using existing technology, so they will not be elaborated here.

[0020] In this embodiment, refer to Figure 2 The transmission mechanism includes a first synchronous pulley 230, a second synchronous pulley 250, and a synchronous belt 240. The first synchronous pulley 230 is fixedly sleeved on the output shaft of the reducer 220, and the second synchronous pulley 250 is fixedly sleeved on the main shaft of the steering wheel 100. The synchronous belt 240 connects the first synchronous pulley 230 and the second synchronous pulley 250. In this way, when the first servo motor 210 is running, the steering wheel 100 can be driven to rotate through the synchronous belt 240 to achieve automatic steering.

[0021] In another embodiment, the transmission mechanism may further include a gearbox or other structure.

[0022] In this embodiment, refer to Figure 3-5The second driving component includes a second servo motor 410, a lead screw module 420, and a fixing plate 430. The lead screw module 420 includes a lead screw seat 423, a lead screw 421 rotatably mounted on the lead screw seat 423, and a nut 422 connected to the lead screw 421. A slide rail 424 is provided on the lead screw seat 423, with the length direction of the slide rail 424 parallel to the length direction of the lead screw 421. A slider 425 is slidably connected to the slide rail 424. The nut 422 is fixedly connected to the slider 425, thereby guiding the movement of the nut 422. The second servo motor 410 is connected to the lead screw seat 423 through a motor mounting plate 411, and the main shaft of the second servo motor 410 is coaxially connected to the lead screw 421 through a coupling. The slider 425 is connected to the fixing plate 430. The elastic limiting member 500 is installed on the fixed plate 430, and the elastic limiting member 500 includes two elastic posts 510. The two elastic posts 510 are arranged along the shifting direction of the gear lever 300. The gears that the gear lever 300 can shift to include forward gear, reverse gear and neutral gear. When the gear is neutral gear, the gear lever 300 is located between the two elastic posts 510.

[0023] The second servo motor 410 drives the lead screw 421 to rotate, thereby driving the nut 422, slider 425 and fixing plate 430 to move in a straight line. When the fixing plate 430 moves, the elastic column 510 abuts against the gear lever 300 and drives the gear lever 300 to move, thereby realizing automatic gear shifting.

[0024] It is understandable that the automatic shifting of forward, reverse and neutral gears by controlling the parameters of the second servo motor 410 through the controller is existing technology and is not an innovation of this utility model, so it will not be elaborated here.

[0025] Furthermore, refer to Figure 5 The elastic column 510 includes a push pin 511 and a spring 512. The fixing plate 430 is provided with a mounting hole 431. The push pin 511 is slidably connected in the mounting hole 431. The spring 512 is connected between the push pin 511 and the mounting plate. The direction of the spring force of the spring 512 is consistent with the axial direction of the mounting hole 431. This allows the push pin 511 to move up and down, so that when manually shifting gears, the gear lever 300 can pass over the position of the push pin 511. That is, when the driver's pushing force on the gear lever 300 is greater than the spring force of the spring 512, the spring 512 moves downward, and the gear lever 300 can be moved to the forward or reverse gear position.

[0026] In a preferred embodiment, the elastic post 510 further includes a screw 513, which is threaded into the mounting hole 431. The spring 512 is connected between the screw 513 and the ejector pin 511, so that the elastic force of the spring 512 can be adjusted by rotating the position of the screw 513.

[0027] The forklift steering wheel mechanism of this embodiment can switch between automatic driving mode and manual driving mode. In manual driving mode, the first servo motor 210 and the second servo motor 410 are turned off by a switching module. The switching module is a switch button that can be connected to the power lines of the first servo motor 210 and the second servo motor 410. When manual driving mode is needed, pressing the switch button de-energizes the first servo motor 210 and the second servo motor 410, allowing manual steering wheel 100 to be turned and gear shifting to be done by moving the gear lever 300. When automatic driving mode is needed, the switch button is turned on to energize the first servo motor 210 and the second servo motor 410. The operation of the first servo motor 210 and the second servo motor 410 is controlled by the forklift's automatic driving module. When the first servo motor 210 is running, it drives the steering wheel 100 to rotate via the synchronous belt 240, achieving automatic steering wheel 100. When the second servo motor 410 is running, it drives the gear lever 300 to move via the lead screw module 420 and the elastic column 510, achieving automatic gear shifting.

[0028] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A forklift truck steering wheel mechanism characterised in that: The system includes a steering wheel, a steering wheel drive module, a gear lever, a gear lever drive module, and a switching module. The steering wheel drive module includes a first drive component and a transmission mechanism. When the first drive component is in operation, it drives the main shaft of the steering wheel to rotate through the transmission mechanism. The gear lever drive module includes a second drive component and an elastic limiting component. When the second drive component is in operation, it drives the gear lever to move through the elastic limiting component to perform gear shifting. The switching module is used to activate / deactivate the first drive component and the second drive component.

2. A forklift steering wheel mechanism according to claim 1, characterised in that: The first driving component includes a first servo motor and a reducer. The first servo motor is a 200W servo motor, and the reducer has a reduction ratio of 10.

3. A fork truck steering wheel mechanism according to claim 2 wherein: The encoder of the first servo motor is a 2500-line incremental encoder.

4. A fork truck steering wheel mechanism according to claim 2 wherein: The transmission mechanism includes two synchronous pulleys and a synchronous belt connecting the two synchronous pulleys. The two synchronous pulleys are respectively fixedly sleeved on the output shaft of the reducer and the main shaft of the steering wheel.

5. A forklift steering wheel mechanism according to claim 1, wherein: The second driving component includes a second servo motor, a lead screw module, and a fixed plate. The spindle of the second servo motor is connected to the lead screw of the lead screw module, the nut of the lead screw module is connected to the fixed plate, and the elastic limiting component is mounted on the fixed plate.

6. A fork truck steering wheel mechanism according to claim 5 wherein: The elastic limiting member includes two elastic posts, which are arranged along the shifting direction of the gear lever. The gears of the gear lever include forward, reverse and neutral. When the gear is in neutral, the gear lever is located between the two elastic posts.

7. A fork truck steering wheel mechanism according to claim 6 wherein: The elastic column includes a pin and a spring. The fixing plate is provided with a mounting hole. The pin is slidably connected in the mounting hole. The spring is connected between the pin and the mounting plate. The spring force direction is consistent with the axial direction of the mounting hole.

8. A forklift steering wheel mechanism according to claim 7, characterized in that: The elastic post also includes a screw, which is threaded into the mounting hole, and the spring is connected between the screw and the ejector pin.

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