Forklift electric steering axle and power-off auxiliary steering mechanism thereof

Abstract

The invention discloses a forklift electric steering axle and a power-off auxiliary steering mechanism thereof, and belongs to the technical field of electric steering axles. The device comprises an assembling plate, a transmission box is fixedly arranged on the assembling plate, an electric driving mechanism is fixedly arranged on the transmission box, the device further comprises a magnetic control box fixed to the top of the transmission box, a magnetic control clutch mechanism is arranged in the magnetic control box in a matched mode, an upper electromagnetic plate is arranged in the magnetic control box, and a lower electromagnetic plate is arranged in the magnetic control box. The upper electromagnetic plate regulates and controls the position of the magnetic control clutch mechanism through magnetic attraction. After power failure, the upper electromagnetic plate loses magnetic attraction force, and the magnetic block drives the transmission sleeve to move downwards under the action of gravity, so that the clutch wheel is aligned with the pneumatic transmission wheel. The pneumatic motor works, the pneumatic transmission wheel is driven to rotate through the transmission belt, power is transmitted to the positioning shaft through the clutch wheel, the lower transmission sleeve and other components, then the transmission frame and the rim supporting seat are driven to rotate, and the problem that in the prior art, the running direction of the forklift cannot be flexibly adjusted after power failure is solved.

Description

Technical Field

[0001] This invention relates to the field of electric steering axles, and particularly to an electric steering axle for forklifts and its power-off auxiliary steering mechanism. Background Technology

[0002] An electric steering axle is an axle that uses an electric power steering system to achieve steering function. It provides auxiliary torque through a motor, reducing the driver's steering effort. Its structure includes an electric power booster, sensors, and a steering mechanism, and it can adjust the amount of assistance in real time according to vehicle speed and steering intention.

[0003] Forklifts are industrial material handling vehicles used for loading, unloading, stacking, and short-distance transport. Electric steering axles in forklifts provide electric power steering, improving operational stability.

[0004] When existing electric steering axles are used in forklifts, they typically rely on motors for flexible steering, which require an external power source for continuous operation. However, when a forklift experiences a battery failure, power outage, or unexpected shutdown during operation, the electric steering axle locks instantly due to loss of power, resulting in complete loss of steering function. In this situation, the forklift can only move along a straight line or a fixed trajectory, unable to adjust its direction according to on-site needs, greatly increasing the risk of collisions with surrounding equipment, personnel, or goods. This not only limits the forklift's emergency dispatch flexibility but also significantly increases safety risks and management complexity at the work site. Summary of the Invention

[0005] This invention provides an electric steering axle for forklifts and its power-off auxiliary steering mechanism, which can solve the problem in the prior art that the electric steering axle cannot flexibly adjust the forklift's running direction after power failure.

[0006] An electric steering axle for a forklift and its power-off auxiliary steering mechanism include an assembly plate. A transmission box is fixedly mounted on the assembly plate, and an electric drive mechanism is fixedly mounted on the transmission box. The device also includes a magnetic control box fixed to the top of the transmission box. A magnetic control clutch mechanism is fitted inside the magnetic control box, and an upper electromagnetic plate is provided inside the magnetic control box. The upper electromagnetic plate controls the position of the magnetic control clutch mechanism by magnetic attraction. The magnetic control clutch mechanism passes through the transmission box. A pneumatic drive mechanism is also provided inside the transmission box. A pneumatic drive wheel that drives the pneumatic drive mechanism and an electric drive wheel that drives the electric drive mechanism are rotatably mounted on the transmission box. The magnetic control clutch mechanism receives power transmitted by the electric drive wheel when it cooperates with the electric drive wheel, and receives power transmitted by the pneumatic drive wheel when it cooperates with the pneumatic drive wheel. A positioning shaft that slides longitudinally inside the magnetic control clutch mechanism is fitted on the assembly plate.

[0007] As a further embodiment of the present invention: the magnetically controlled clutch mechanism includes a transmission sleeve, the transmission sleeve including an upper transmission sleeve that is longitudinally slidably disposed inside the magnetic control box, and a lower transmission sleeve that is rotatably connected to the upper transmission sleeve. A magnetic block that cooperates with the upper electromagnetic plate is fixedly disposed above the upper transmission sleeve, and a clutch wheel that cooperates with the pneumatic drive wheel and the electric drive wheel is coaxially fixedly disposed at the bottom of the lower transmission sleeve.

[0008] As a further embodiment of the present invention: the lower transmission sleeve is coaxially arranged through the center of the electric transmission wheel, the clutch wheel is located between the pneumatic transmission wheel and the electric transmission wheel, and limit blocks are fixedly arranged on both sides of the clutch wheel. The pneumatic transmission wheel and the electric transmission wheel are each provided with a limit groove that cooperates with the limit block on the side near the clutch wheel. When the corresponding limit block is embedded in the corresponding limit groove, the transmission of the clutch wheel is realized through the limit block and the limit groove.

[0009] As a further aspect of the present invention: each set of limiting blocks is rotatably equipped with a pressure roller to reduce the friction force on the clutch wheel.

[0010] As a further aspect of the present invention: a lower electromagnetic plate is fixedly provided at the bottom of the magnetic control box, and the magnetic block is longitudinally slidably engaged between the lower electromagnetic plate and the upper electromagnetic plate.

[0011] As a further embodiment of the present invention: the electric drive mechanism includes a drive motor fixedly mounted on the transmission box, an electric drive drive wheel fixedly mounted at the output end of the drive motor, a first transmission belt cooperating between the electric drive drive wheel and the electric transmission wheel, a guide block fixedly mounted on the positioning shaft, and a guide groove cooperating with the guide block being opened inside the lower transmission sleeve.

[0012] As a further embodiment of the present invention: the pneumatic drive mechanism includes a pneumatic motor fixedly mounted on the transmission box, a pneumatic drive drive wheel fixedly mounted at the output end of the pneumatic motor, and a second transmission belt cooperating between the pneumatic drive drive wheel and the pneumatic transmission wheel.

[0013] An electric steering axle for forklifts equipped with a power-off auxiliary steering mechanism includes a transmission frame rotatably mounted at the bottom of an assembly plate, wherein a positioning shaft is coaxially and fixedly connected to the transmission frame, and the positioning shaft can drive the transmission frame to rotate.

[0014] As a further aspect of the present invention: a range detection mechanism is provided on the assembly plate, the range detection mechanism includes a laser rim measuring device fixedly mounted on the assembly plate, and an encoding strip that cooperates with the laser rim measuring device is fixedly mounted around the upper end of the transmission frame.

[0015] As a further aspect of the present invention: a braking mechanism is provided on the assembly plate, the braking mechanism including an electric push block fixedly mounted on the assembly plate, and a friction wheel that cooperates with the electric push block is fixedly mounted around the upper end of the transmission frame.

[0016] The beneficial effects of this invention are: 1. In this invention, the electric steering axle for forklifts features power-off assisted steering, effectively adjusting forklift steering in the event of a power outage. After power failure, the upper electromagnetic plate loses its magnetic attraction, and the magnetic block, under gravity, causes the transmission sleeve to move downwards, aligning the clutch wheel with the pneumatic drive wheel. The pneumatic motor then operates, driving the pneumatic drive wheel to rotate via a transmission belt. Power is then transmitted to the positioning shaft through the clutch wheel, lower transmission sleeve, and other components, thereby rotating the transmission frame and wheel rim support, achieving pneumatic steering. This solves the problem of existing technologies where the forklift's direction of travel cannot be flexibly adjusted after a power outage, ensuring normal forklift operation during power failures.

[0017] 2. In this invention, the range detection mechanism consists of a laser wheel rim measuring device fixed to the assembly plate and an coded strip fixedly surrounding the transmission frame. Each direction of the coded strip has a unique identifier. The laser wheel rim measuring device detects these identifiers to accurately determine the alignment direction of the wheel rim support and provides feedback, improving operational accuracy. The braking mechanism includes an electric push block fixed to the assembly plate and a friction wheel fixedly surrounding the transmission frame. After detecting that the transmission frame has rotated to its correct position, the system stops supplying air to the pneumatic motor. Simultaneously, the electric push block presses against the friction wheel to increase friction, achieving timely braking. The combination of these two mechanisms ensures the accuracy and stability of the forklift's steering. Attached Figure Description

[0018] Figure 1 This invention provides a schematic diagram of the overall structure of an electric steering axle for forklifts. Figure 2 This is a schematic diagram of the power-off auxiliary steering mechanism provided by the present invention; Figure 3 This invention provides a schematic diagram of the internal structure of a magnetic control box for an electric steering axle of a forklift. Figure 4 This invention provides a schematic diagram of a limit block structure for an electric steering axle of a forklift. Figure 5 This is a schematic diagram of a forklift electric steering axle transmission sleeve structure provided by the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Assembly plate; 2. Transmission box; 201. Pneumatic drive wheel; 202. Electric drive wheel; 3. Magnetic control box; 301. Upper electromagnetic plate; 302. Lower electromagnetic plate; 4. Electric drive mechanism; 401. Drive motor; 402. Electric drive drive wheel; 403. First transmission belt; 5. Magnetic control clutch mechanism; 501. Transmission sleeve; 5011. Guide groove; 5012. Lower transmission sleeve; 5013. Upper transmission sleeve; 502. Magnetic block 503. Clutch wheel; 504. Limiting block; 505. Pressure roller; 506. Limiting groove; 6. Pneumatic drive mechanism; 601. Pneumatic motor; 602. Pneumatic drive wheel; 603. Second transmission belt; 7. Range detection mechanism; 701. Laser wheel rim measuring device; 702. Encoding belt; 8. Braking mechanism; 801. Electric push block; 802. Friction wheel; 9. Positioning shaft; 901. Guide block; 10. Transmission frame. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1 to 5 As shown in the figure, an embodiment of the present invention provides an electric steering axle for a forklift and its power-off auxiliary steering mechanism, including an assembly plate 1, which serves as the basic support component of the entire device, on which a transmission box 2 is fixedly mounted. An electric drive mechanism 4 is fixedly mounted on the transmission box 2, which is the core component that provides power to the forklift under normal power conditions. The device also includes a magnetic control box 3 fixed to the top of the transmission box 2, in which a magnetic control clutch mechanism 5 is configured, and an upper electromagnetic plate 301 is provided inside the magnetic control box 3. The upper electromagnetic plate 301 adjusts the position of the magnetic control clutch mechanism 5 by magnetic attraction, and the magnetic control clutch mechanism 5 passes through the transmission box 2 to realize the switching between different power sources.

[0022] Specifically, the magnetically controlled clutch mechanism 5 includes a transmission sleeve 501, which is composed of an upper transmission sleeve 5013 that is longitudinally slidably disposed inside the magnetic control box 3, and a lower transmission sleeve 5012 that is rotatably connected to the upper transmission sleeve 5013. A magnetic block 502, preferably a permanent magnet, is fixedly disposed above the upper transmission sleeve 5013 and cooperates with the upper electromagnetic plate 301. When the upper electromagnetic plate 301 is energized, due to the principle of magnetic attraction, the magnetic block 502 and the upper electromagnetic plate 301 attract each other, thereby driving the transmission sleeve 501 to move upward, completing the control of the magnetically controlled clutch mechanism 5 and preparing for the subsequent switching of the power source.

[0023] The transmission housing 2 also houses a pneumatic drive mechanism 6. A pneumatic drive wheel 201, which drives the pneumatic drive mechanism 6, and an electric drive wheel 202, which drives the electric drive mechanism 4, are rotatably mounted on the transmission housing 2. Under normal operating conditions, the electric drive mechanism 4 drives the electric drive wheel 202 to rotate, providing electric power to the forklift. After a power outage, the pneumatic drive mechanism 6 drives the pneumatic drive wheel 201 to rotate, ensuring the forklift still has a power source even when power is off. A clutch wheel 503, which works with the pneumatic drive wheel 201 and the electric drive wheel 202, is coaxially fixed to the bottom of the lower transmission sleeve 5012. The power source is determined by adjusting the position of the clutch wheel 503. When the magnetically controlled clutch mechanism 5 is aligned with the electric drive wheel 202, the clutch wheel 503 receives the power transmitted by the electric drive wheel 202; when the magnetically controlled clutch mechanism 5 is aligned with the pneumatic drive wheel 201, the clutch wheel 503 receives the power transmitted by the pneumatic drive wheel 201, thereby realizing flexible switching between electric and pneumatic power sources.

[0024] The lower transmission sleeve 5012 is coaxially positioned through the center of the electric transmission wheel 202, as shown below. Figure 3 , Figure 4 As shown, the clutch wheel 503 is located between the pneumatic drive wheel 201 and the electric drive wheel 202. To ensure the transmission stability and accuracy between the clutch wheel 503 and the pneumatic drive wheel 201 and the electric drive wheel 202, limit blocks 504 are fixedly installed on both sides of the clutch wheel 503. Limiting grooves 506 that cooperate with the limit blocks 504 are provided on the side of the pneumatic drive wheel 201 and the electric drive wheel 202 near the clutch wheel 503. When the clutch wheel 503 moves to a position aligned with the corresponding drive wheel, the limit blocks 504 will embed into the limiting grooves 506. Through this limiting transmission method, stable transmission of the clutch wheel 503 is achieved.

[0025] As an optional technical solution, a lower electromagnetic plate 302 is fixedly installed at the bottom of the magnetic control box 3. The magnet of the lower electromagnetic plate 302 can be larger than the volume of the upper electromagnetic plate 301. The magnetic block 502 slides longitudinally between the lower electromagnetic plate 302 and the upper electromagnetic plate 301. After the lower electromagnetic plate 302 and the upper electromagnetic plate 301 are energized, the lower electromagnetic plate 302 outputs a magnetic thrust to the magnetic block 502, and the upper electromagnetic plate 301 outputs a magnetic attraction to the magnetic block 502. Through this dual magnetic force, the position of the magnetic block 502 can be adjusted more precisely, thereby achieving precise control of the magnetic clutch mechanism 5.

[0026] When the power is not interrupted, the lower electromagnetic plate 302 and the upper electromagnetic plate 301 are energized. The lower electromagnetic plate 302 outputs a magnetic thrust to the magnetic block 502, and the upper electromagnetic plate 301 outputs a magnetic attraction to the magnetic block 502. Under the combined action of these two magnetic forces, the magnetic block 502 on the upper transmission sleeve 5013 comes into contact with the upper electromagnetic plate 301, causing the transmission sleeve 501 to move upward. Simultaneously, the upward movement of the transmission sleeve 501 causes the clutch wheel 503 to move upward. The clutch wheel 503 drives the corresponding limit block 504 to engage in the limit groove 506 on the electric transmission wheel 202. Through the limiting transmission of the limit block 504 and the limit groove 506, stable transmission of the clutch wheel 503 is achieved. The clutch wheel 503 drives the lower transmission sleeve 5012 to rotate, which in turn drives the positioning shaft 9 to rotate, completing the electric output and providing power for the normal operation of the forklift.

[0027] After power is cut off, the upper electromagnetic plate 301 is not energized and loses its magnetic attraction to the magnetic block 502. At this time, the magnetic block 502 will fall onto the lower electromagnetic plate 302 under the action of gravity, causing the transmission sleeve 501 to move downward. The downward movement of the transmission sleeve 501 causes the clutch wheel 503 to move downward. The clutch wheel 503 drives the corresponding limit block 504 to engage in the limit groove 506 on the pneumatic transmission wheel 201. Similarly, the transmission of the clutch wheel 503 is achieved through the limiting transmission of the limit block 504 and the limit groove 506. The clutch wheel 503 drives the lower transmission sleeve 5012 to rotate, which in turn drives the positioning shaft 9 to rotate, completing the pneumatic output and ensuring that the forklift can still be directionally adjusted when the power is off.

[0028] Furthermore, to ensure the stability and accuracy of power transmission, a positioning shaft 9 is fitted on the assembly plate 1, which slides longitudinally within the magnetic clutch mechanism 5. A guide block 901 is fixedly mounted on the positioning shaft 9, and a guide groove 5011 is formed inside the lower transmission sleeve 5012 to mate with the guide block 901. When the upper transmission sleeve 5013 rotates, it drives the guide block 901 within the guide groove 5011 to rotate, thereby driving the positioning shaft 9 to rotate, completing the power output and ensuring the stability of power transmission.

[0029] Each set of limit blocks 504 is rotatably equipped with a pressure roller 505. The pressure roller 505 is designed to reduce the frictional force experienced by the limit block 504 as it rotates along the drive wheel during the transmission process, before the clutch wheel 503 engages with the limit groove 506 on the drive wheel. When the clutch wheel 503 is transmitting power with the pneumatic drive wheel 201 or the electric drive wheel 202, the pressure roller 505 can reduce the direct friction between the two, thereby reducing wear, extending the service life of components, and improving the reliability and stability of the device.

[0030] In one specific embodiment, the electric drive mechanism 4 includes a drive motor 401 fixedly mounted on the transmission box 2. The drive motor 401 serves as the source of electric power, and its output end is fixedly mounted with an electric drive pulley 402. A first transmission belt 403 is provided between the electric drive pulley 402 and the electric transmission pulley 202. When energized, the drive motor 401 drives the electric drive pulley 402 to rotate, and the electric drive pulley 402 drives the electric transmission pulley 202 to rotate via the first transmission belt 403, thereby completing the transmission of the clutch pulley 503 and providing electric power to the forklift.

[0031] Furthermore, the pneumatic drive mechanism 6 includes a pneumatic motor 601 fixedly mounted on the transmission box 2. Preferably, the pneumatic motor 601 is a bidirectional rotary pneumatic motor 601, which allows for more flexible control of the forklift's steering. A pneumatic drive pulley 602 is fixedly mounted at the output end of the pneumatic motor 601, and a second transmission belt 603 is connected between the pneumatic drive pulley 602 and the pneumatic transmission pulley 201. In the event of a power outage, the pneumatic motor 601 drives the pneumatic drive pulley 602 to rotate, and the pneumatic drive pulley 602, via the second transmission belt 603, drives the pneumatic transmission pulley 201 to rotate, thus completing the transmission to the clutch pulley 503 and providing pneumatic power to the forklift.

[0032] The diameter of the electric drive drive wheel 402 is smaller than that of the electric transmission wheel 202, and the diameter of the pneumatic drive drive wheel 602 is smaller than that of the pneumatic transmission wheel 201. This design makes the rotation speed of the transmission wheels much lower than that of the drive wheels. This facilitates subsequent fine-tuning of the forklift's transport direction, as precise adjustments to the direction are sometimes required during forklift operation. A smaller gear ratio provides more accurate control, meeting the forklift's usage needs under different working conditions.

[0033] The present invention also provides a forklift electric steering axle equipped with the above-mentioned power-off auxiliary steering mechanism, such as... Figure 1 , Figure 3 As shown, the system includes a transmission frame 10 rotatably mounted at the bottom of the assembly plate 1. A positioning shaft 9 is coaxially and fixedly connected to the transmission frame 10, and the positioning shaft 9 can drive the transmission frame 10 to rotate. The bottom of the transmission frame 10 is provided with a wheel rim support seat for mounting the tire. The wheel rim support seat is the part where the forklift tire is mounted. By rotating the transmission frame 10, the tire can be driven to change direction, thereby realizing the steering function of the forklift.

[0034] In actual use, it was found that the power output of the pneumatic motor 601 was not as stable as that of the servo electric motor. This made it difficult to accurately determine the alignment of the wheel rim support during later use. For example, when precise control of the forklift's steering angle is required, the unstable power of the pneumatic motor 601 may cause a deviation between the actual and expected positions of the wheel rim support, affecting the forklift's operating accuracy.

[0035] To address the aforementioned issues, a range detection mechanism 7 is installed on the assembly plate 1. This mechanism includes a laser rim measuring device 701 fixedly mounted on the assembly plate 1, and an coded strip 702 that cooperates with the laser rim measuring device 701 is fixedly mounted around the upper end of the transmission frame 10. Each direction on the coded strip 702 is uniquely marked. By detecting these markings on the coded strip 702, the laser rim measuring device 701 can accurately determine the alignment direction of the wheel rim support and provide this information to the operator, enabling timely and accurate operation of the forklift.

[0036] Because the pneumatic motor 601 lacks stability, a braking mechanism 8 is installed on the mounting plate 1 to improve the controllability of power output. This mechanism brakes the transmission frame 10 promptly after it has been detected to have rotated into position. The braking mechanism 8 includes an electric push block 801 fixedly mounted on the mounting plate 1, and a friction wheel 802 that cooperates with the electric push block 801 is fixedly mounted around the upper end of the transmission frame 10. After detecting that the transmission frame 10 has slowly rotated into position, the system immediately stops supplying air pressure to the pneumatic motor 601 and simultaneously activates the electric push block 801. The electric push block 801 compresses the friction wheel 802, increasing friction to prevent the friction wheel 802 from continuing to rotate, thereby achieving timely braking of the transmission frame 10 and ensuring the accuracy and stability of the forklift's steering.

[0037] In addition to the main power reserve equipment, the forklift is also equipped with a small-capacity battery with high stability to power the detection equipment and information transmission control system after a power outage. The backup auxiliary battery is existing technology, and its structure and wiring will not be described in detail here.

[0038] Working principle: When the forklift is powered on normally, both the lower electromagnetic plate 302 and the upper electromagnetic plate 301 are energized simultaneously. The lower electromagnetic plate 302 outputs a magnetic thrust to the magnetic block 502, and the upper electromagnetic plate 301 outputs a magnetic attraction to the magnetic block 502. Under the combined action of these two magnetic forces, the magnetic block 502 on the upper transmission sleeve 5013 comes into contact with the upper electromagnetic plate 301, causing the transmission sleeve 501 to move upward. Simultaneously, the upward movement of the transmission sleeve 501 causes the clutch wheel 503 to move upward.

[0039] At this time, the drive motor 401, as the source of electric power, starts working, driving the electric drive wheel 402 to rotate. The electric drive wheel 402 drives the electric transmission wheel 202 to rotate via the first transmission belt 403. The limiting block 504 on the clutch wheel 503 is embedded in the limiting groove 506 on the electric transmission wheel 202. Through the limiting transmission of the limiting block 504 and the limiting groove 506, stable transmission to the clutch wheel 503 is achieved, thereby transmitting power to the clutch wheel 503. The clutch wheel 503 drives the lower transmission sleeve 5012 to rotate. When the lower transmission sleeve 5012 rotates, the guide groove 5011 inside it drives the guide block 901 on the positioning shaft 9 to rotate, thereby driving the positioning shaft 9 to rotate. The positioning shaft 9 drives the transmission frame 10 to rotate, and the transmission frame 10 then drives the wheel rim support seat to rotate, realizing the electric steering of the forklift and providing power for the normal operation of the forklift.

[0040] When the forklift is powered off, the upper electromagnetic plate 301 loses power and no longer exerts a magnetic attraction on the magnetic block 502. At this time, the magnetic block 502 will fall onto the lower electromagnetic plate 302 under the action of gravity, causing the transmission sleeve 501 to move downward. The downward movement of the transmission sleeve 501 causes the clutch wheel 503 to move downward.

[0041] The pneumatic motor 601 starts working, driving the pneumatic drive wheel 602 to rotate. The pneumatic drive wheel 602 drives the pneumatic transmission wheel 201 to rotate via the second transmission belt 603. The limiting block 504 on the clutch wheel 503 is embedded in the limiting groove 506 on the pneumatic transmission wheel 201. Similarly, the limiting transmission of the clutch wheel 503 is achieved through the limiting transmission of the limiting block 504 and the limiting groove 506. The clutch wheel 503 drives the lower transmission sleeve 5012 to rotate, which in turn drives the positioning shaft 9 to rotate. The positioning shaft 9 then drives the transmission frame 10 to rotate, ultimately causing the wheel rim support to rotate, realizing the pneumatic steering of the forklift and ensuring that the forklift can still be adjusted in the event of a power failure.

[0042] In practical use, the laser wheel rim measuring device 701 detects the markings on the coding tape 702 on the transmission frame 10. Each direction on the coding tape 702 has a unique marking. By detecting these markings, the alignment direction of the wheel rim support can be accurately determined, and the relevant information is fed back to the operator so that the operator can accurately operate the forklift. When the transmission frame 10 is detected to be in position, the system immediately stops supplying air pressure to the pneumatic motor 601 and simultaneously activates the electric push block 801. The electric push block 801 presses against the friction wheel 802 on the transmission frame 10, increasing friction to prevent the friction wheel 802 from continuing to rotate, thus achieving timely braking of the transmission frame 10 and ensuring the accuracy and stability of the forklift's steering.

[0043] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A power-off assisted steering mechanism, comprising an assembly plate (1), wherein a transmission box (2) is fixedly mounted on the assembly plate (1), and an electric drive mechanism (4) is fixedly mounted on the transmission box (2), characterized in that: The device also includes a magnetic control box (3) fixed on the top of the transmission box (2). A magnetic control clutch mechanism (5) is provided inside the magnetic control box (3). An upper electromagnetic plate (301) is provided inside the magnetic control box (3). The upper electromagnetic plate (301) adjusts the position of the magnetic control clutch mechanism (5) by magnetic attraction. The magnetic control clutch mechanism (5) passes through the transmission box (2). The transmission box (2) is also equipped with a pneumatic drive mechanism (6). The transmission box (2) is rotatably equipped with a pneumatic drive wheel (201) that is mutually driven and cooperates with the pneumatic drive mechanism (6), and an electric drive wheel (202) that is mutually driven and cooperates with the electric drive mechanism (4). The magnetic clutch mechanism (5) cooperates with the electric drive wheel (202) to receive the power transmitted by the electric drive wheel (202). The magnetic clutch mechanism (5) cooperates with the pneumatic drive wheel (201) to receive the power transmitted by the pneumatic drive wheel (201). The mounting plate (1) is equipped with a positioning shaft (9) that slides longitudinally inside the magnetic clutch mechanism (5).

2. The power-off assisted steering mechanism as described in claim 1, characterized in that, The magnetically controlled clutch mechanism (5) includes a transmission sleeve (501), which includes an upper transmission sleeve (5013) that is longitudinally slidably disposed inside the magnetic control box (3), and a lower transmission sleeve (5012) that is rotatably connected to the upper transmission sleeve (5013). A magnetic block (502) that cooperates with the upper electromagnetic plate (301) is fixedly disposed above the upper transmission sleeve (5013), and a clutch wheel (503) that cooperates with the pneumatic drive wheel (201) and the electric drive wheel (202) is coaxially fixedly disposed at the bottom of the lower transmission sleeve (5012).

3. The power-off auxiliary steering mechanism as described in claim 2, characterized in that, The lower transmission sleeve (5012) is coaxially arranged through the center of the electric transmission wheel (202). The clutch wheel (503) is located between the pneumatic transmission wheel (201) and the electric transmission wheel (202). Limiting blocks (504) are fixedly arranged on both sides of the clutch wheel (503). The pneumatic transmission wheel (201) and the electric transmission wheel (202) are both provided with limiting grooves (506) that cooperate with the limiting blocks (504) on the side near the clutch wheel (503). When the corresponding limiting block (504) is embedded in the corresponding limiting groove (506), the transmission of the clutch wheel (503) is realized through the limiting transmission of the limiting block (504) and the limiting groove (506).

4. The power-off assisted steering mechanism as described in claim 3, characterized in that, Each of the limiting blocks (504) is rotatably equipped with a pressure roller (505) to reduce the friction force on the clutch wheel (503).

5. A power-off assisted steering mechanism as described in claim 1, 3, or 4, characterized in that, The bottom of the magnetic control box (3) is fixedly provided with a lower electromagnetic plate (302), and the magnetic block (502) is longitudinally slidably fitted between the lower electromagnetic plate (302) and the upper electromagnetic plate (301).

6. A power-off assisted steering mechanism as described in claim 1, 3, or 4, characterized in that, The electric drive mechanism (4) includes a drive motor (401) fixedly mounted on the transmission box (2), an electric drive drive wheel (402) fixedly mounted at the output end of the drive motor (401), a first transmission belt (403) cooperating between the electric drive drive wheel (402) and the electric transmission wheel (202), a guide block (901) fixedly mounted on the positioning shaft (9), and a guide groove (5011) cooperating with the guide block (901) is opened inside the lower transmission sleeve (5012).

7. The power-off assisted steering mechanism as described in claim 6, characterized in that, The pneumatic drive mechanism (6) includes a pneumatic motor (601) fixedly mounted on the transmission box (2). A pneumatic drive drive wheel (602) is fixedly mounted at the output end of the pneumatic motor (601). A second transmission belt (603) is provided between the pneumatic drive drive wheel (602) and the pneumatic transmission wheel (201).

8. A forklift electric steering axle equipped with the power-off assisted steering mechanism as described in claim 7, characterized in that, It includes a transmission frame (10) that is rotatably mounted at the bottom of the assembly plate (1), and the positioning shaft (9) is coaxially fixedly connected to the transmission frame (10). The positioning shaft (9) can drive the transmission frame (10) to rotate.

9. A forklift electric steering axle as described in claim 8, characterized in that, The assembly plate (1) is equipped with a range detection mechanism (7), which includes a laser rim measuring device (701) fixedly mounted on the assembly plate (1). The upper end of the transmission frame (10) is surrounded by an encoding strip (702) that cooperates with the laser rim measuring device (701).

10. A forklift electric steering axle as described in claim 9, characterized in that, A braking mechanism (8) is provided on the assembly plate (1). The braking mechanism (8) includes an electric push block (801) fixedly mounted on the assembly plate (1). A friction wheel (802) that cooperates with the electric push block (801) is fixedly mounted around the upper end of the transmission frame (10).

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