Forklift truck steering control device

Abstract

The application discloses a forklift steering control device, and relates to the technical field of forklift steering control, which comprises a steering assembly, a driving module is installed below the steering assembly, a steering control mechanism is arranged below the driving module, the steering control mechanism is used for flexible steering, automatic adaptation to uneven road surface and steering impact, the steering assembly comprises a steering gear, a steering knuckle and a steering drag link, the steering drag link in the steering assembly is rotationally connected with a steering crankshaft, a steering chassis made of metal framework material is combined with a middle shaft piece made of rubber material, so that the I-shaped steering chassis core frame has elastic deformation space, when the forklift is steering, the middle details can be bent and deformed to a certain extent, steering impact is effectively absorbed, and the dynamic response capability and steering flexibility of the forklift are improved, in addition, the flexible joint structure can also reduce the friction resistance and energy loss during steering, so that the forklift steering is more smooth and accurate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of forklift steering control, in particular to a forklift steering control device. BACKGROUND

[0002] The forklift steering control device is a key part of the forklift control system, which is mainly responsible for controlling the steering action of the forklift, and the forklift steering control device adopts rear wheel steering design, which realizes flexible steering by synchronous deflection of the two rear wheels, and the front wheels are responsible for driving and bearing, so as to accurately control the steering of the forklift and ensure that the forklift can flexibly and stably change the driving direction in different working scenes.

[0003] In the Chinese patent with the patent number CN102991577A, a forklift steering control device is disclosed, which includes a pair of front wheels, a pair of rear wheels and a steering control assembly, the steering control assembly is connected with one of the front wheels and the rear wheel on the same side of the front wheel, when the forklift needs to turn, rotating the control rod can drive the front rotating assembly to rotate, at the same time, the front rotating assembly drives the rear rotating assembly to rotate through the transmission assembly, thereby the first front wheel and the first rear wheel turn at the same time.

[0004] But the device in the above-mentioned reference file still has the following defects in specific use: 1. Compared with the device in the above-mentioned reference file, in the actual use process, since only one front wheel and the rear wheel on the same side are controlled to turn, when 180-degree turning or right-angle turning is performed in a narrow space, one-time accurate turning cannot be realized, and multiple direction adjustments are needed, which increases the operation difficulty and time cost, and this way can only realize a specific turning mode, such as the front wheel and the rear wheel on the same side turning in the same direction or in the opposite direction, when the forklift is in an irregular site or needs to avoid obstacles, it cannot be flexibly coped with, which limits the mobility of the forklift.

[0005] At the same time, during the turning process, since only one front wheel and the rear wheel on the same side participate in the turning, the lateral force and friction force borne by these two tires are relatively large, while the force borne by the tire on the other side is relatively small, long-term use will cause uneven tire wear, affecting the service life and safety of the tire, and during the turning process, the stability of the vehicle will also be reduced due to the change of the center of gravity distribution of the vehicle, especially in the case of heavy load, safety accidents such as rollover are easy to occur.

[0006] 2. In addition, compared with the above-mentioned reference file, the front and rear wheels are designed to turn at the same time, while the original design of the forklift is to flexibly transport goods in a narrow space, and the rear wheel steering is usually adopted, and the front wheel is responsible for driving and bearing, however, if the front and rear wheels of the forklift turn at the same time, the balance will be broken.

[0007] On the one hand, the steering flexibility will be affected, when the forklift turns, the rear wheels need to be deflected to realize flexible steering, if the front wheels also participate in steering, it will increase the complexity of steering, making the forklift become clumsy when turning, difficult to operate flexibly in a small space, in addition, the simultaneous rotation of the front and rear wheels will also cause the inconsistency of the steering angle, further affecting the steering accuracy and stability of the forklift.

[0008] On the other hand, the operation complexity will increase, if the front and rear wheels of the forklift rotate at the same time, the driver needs to control the steering of the front and rear wheels at the same time, which will increase the complexity of operation, increase the difficulty of operation, at the same time, this design will also make it more difficult for the forklift to reverse, because the driver needs to control the steering angle and speed of the front and rear wheels more accurately to avoid collision or damage to the goods.

[0009] Therefore, in view of the above, the present application proposes a forklift steering control device to make up for and improve the shortcomings of the prior art. SUMMARY

[0010] To solve the above technical problems, the present application provides a forklift steering control device to solve the technical problems proposed in the background art.

[0011] To achieve the above purpose, the technical scheme adopted by the present application is as follows: a forklift steering control device, comprising a steering assembly, a driving module is installed below the steering assembly, a steering control mechanism is arranged below the driving module, the steering control mechanism is used for flexible steering, automatically adapting to uneven road surface and steering impact.

[0012] Further, the steering control mechanism comprises a steering chassis installed below the driving module, a connecting sleeve ring is symmetrically installed on the outside of the steering chassis, a steering crankshaft is symmetrically installed on the outside of the steering chassis, a recess is symmetrically formed in the inside of the steering chassis, a steering connecting piece is installed in the inside of the recess, a steering wheel set is installed on the outside of the steering connecting piece, a load bearing connecting piece is symmetrically installed at both ends of the steering chassis, and a load bearing wheel set is installed on the outside of the load bearing connecting piece.

[0013] Further, the steering chassis is made of metal framework material, the core frame of the steering chassis is designed in an I shape, the steering chassis is divided into a front longitudinal axis, a rear longitudinal axis and a main transverse axis, and a central shaft piece is installed in the middle of the steering chassis, the central shaft piece is made of rubber material as a whole, the driving module is designed in a modular manner and assembled on the frame of the steering chassis, horizontal grooves are formed in the side walls of the driving module corresponding to the positions of the steering assembly, limit shafts are installed in the horizontal grooves, and the steering assembly and the driving module are connected in sliding mode through the horizontal grooves and the limit shafts.

[0014] By adopting the above technical scheme, when the forklift turns, the middle part can be bent and deformed to a certain extent, effectively absorbing the impact of turning.

[0015] Further, the connecting sleeve is mounted on the outer wall of the main transverse shaft in the steering chassis, the steering chassis is fixedly connected with the driving module through the connecting sleeve, the connecting sleeve is designed as a telescopic structure, the steering crank is mounted on the outer wall of the rear longitudinal shaft in the steering chassis, and the steering chassis is rotationally connected with the steering assembly through the steering crank.

[0016] Further, the outer wall of the steering connecting piece is mounted with a rubber bushing, and the steering connecting piece is movably connected with the rear longitudinal shaft of the steering chassis through the rubber bushing.

[0017] By adopting the above technical scheme, the rubber bushing can effectively absorb and disperse the vibration and impact from the road surface, thereby reducing the transmission of vibration to the entire vehicle body.

[0018] Further, the side of the steering connecting piece away from the steering chassis is designed in a Y shape, the end of the steering connecting piece away from the steering chassis is mounted with a limiting bin, the end of the steering connecting piece is slidably connected to the inside of the limiting bin, and a baffle is mounted at the center of the inside of the limiting bin.

[0019] By adopting the above technical scheme, the design of the limiting bin limits the excessive movement of the steering connecting piece, ensuring that the steering system can remain stable during adjustment.

[0020] Further, the steering wheel set is mounted outside the rear longitudinal shaft in the steering chassis, and the load bearing wheel set is mounted outside the front longitudinal shaft in the steering chassis, and the surface of the load bearing wheel set is uniformly mounted with arc-shaped blocks.

[0021] By adopting the above technical scheme, the middle protruding part of the arc-shaped block will deform to the same horizontal plane as the two sides when being pressed, so as to increase the friction and grip with the ground.

[0022] Further, the load bearing wheel set adopts a double-layer composite structure, the outer layer is made of high-strength aluminum alloy material for providing good heat dissipation performance, the inner layer is made of cast steel material for ensuring sufficient strength and carrying capacity, and the two layers of the load bearing wheel set are fixedly connected through a support disc.

[0023] By adopting the above technical scheme, the high-strength aluminum alloy material of the outer layer can conduct heat away, and the cast steel material of the inner layer ensures that the load bearing wheel set will not be deformed or damaged.

[0024] Further, the inside of the load bearing wheel set is uniformly mounted with a set of angle arc shafts, and the curved parts of the set of angle arc shafts are fixedly connected with stress rings.

[0025] By adopting the technical scheme, the stress ring fixedly connected with the bending position of the plurality of sets of angle arc shafts can effectively disperse stress.

[0026] Further, the steering assembly includes a steering gear, a steering knuckle and a steering drag link, the steering drag link in the steering assembly is rotationally connected with the steering crankshaft, and the steering drag link in the steering assembly is used to transmit a steering force to make the steering knuckle and the steering wheel group rotate.

[0027] Further, the driving module includes a driving motor, a motor controller and a main controller, the driving motor in the driving module is responsible for converting electrical energy into mechanical energy, and the controller in the driving module is responsible for adjusting the speed, torque and direction of the driving motor.

[0028] Compared with the prior art, the beneficial effects of the present application are: (1) the device combines the steering chassis made of metal skeleton material with the middle shaft made of rubber material, so that the core frame of the I-shaped steering chassis has elastic deformation space, the middle part can be bent and deformed to a certain extent when the forklift turns, the steering impact is effectively absorbed, the dynamic response capability and steering flexibility are improved, in addition, the flexible joint structure can also reduce the friction resistance and energy loss during steering, so that the forklift turns more smoothly and accurately.

[0029] Compared with the prior art, during steering, the middle part, i.e., the middle shaft, can be bent and deformed according to the size and direction of the steering force, so that the forklift can realize more flexible steering action, the steering radius is reduced, the operation in narrow space is more convenient, and the maneuverability and controllability of the forklift are improved.

[0030] For the steering wheel groups installed on both sides of the rear longitudinal shaft, rubber bushings are introduced at the connecting parts, firstly, due to the viscoelastic properties of the rubber bushing, it can effectively absorb and disperse the vibration and impact from the road, thereby reducing the transmission of vibration to the entire vehicle body, and the reduction of vibration means that the collision and friction between parts will also be reduced, thereby effectively reducing the noise generated by vibration, secondly, the rubber bushing has certain flexibility and deformability, which can ensure that the connection between the steering wheel group and the rear longitudinal shaft will not loosen or fail due to slight changes, it can freely stretch and twist within a certain range, and always maintain stable connection between the steering wheel group and the rear longitudinal shaft, ensuring the driving stability and controllability of the forklift.

[0031] The end of the steering connecting piece is designed in a Y shape, which can provide a wider turning space for the steering wheel group and reduce interference during steering, making the rear wheels of the forklift more flexible and smooth during steering, and enabling more precise steering actions to adapt to the work requirements in narrow spaces and complex working conditions. Moreover, this design disperses the steering force, reducing the pressure on the single connection point and enhancing the stability of the entire steering structure. When the forklift is under heavy load or high-speed steering, it can effectively prevent damage or deformation of the connecting piece caused by excessive steering force.

[0032] The Y-shaped end of the steering connecting piece is designed with a limiting bin to limit excessive movement of the steering connecting piece, ensuring the stability of the steering system during adjustment and preventing loss of control due to excessive steering. When the steering wheel group turns to a certain extent, the force of the end will act on the other end, preventing the steering wheel group from swinging or shaking excessively, making the steering process more stable and reducing the risk of tilting and shaking of the forklift during steering.

[0033] (2) Due to the large weight of the drive module, it is connected to the steering chassis frame through a horizontal slot and a limiting shaft, which limits the left and right steering drive of the steering assembly. This design naturally lowers the center of gravity of the vehicle body, and as the load on the vehicle body increases, the advantage of low center of gravity becomes more apparent, significantly improving the stability of the vehicle during driving and operation, reducing the risk of rollover or overturning.

[0034] In addition, in traditional vehicle design, the drive module is often at a certain distance from the steering assembly and chassis frame, which can cause loss of force during transmission. In this design, the drive module is directly assembled on the steering chassis frame and close to the steering assembly. This layout makes power transmission more direct and efficient, and when the vehicle is steering or accelerating, power can be quickly and accurately transmitted to the corresponding actuator, improving the response speed and handling performance of the vehicle. At the same time, short-distance transmission can also reduce energy loss and improve the energy efficiency of the vehicle.

[0035] (3) The arc-shaped blocks are evenly installed on the surface of the bearing wheel group. When the forklift is carrying heavy loads or driving on uneven or slippery ground, the middle protruding part of the arc-shaped blocks will be compressed and deformed to form the same horizontal plane as the two sides. This change increases the contact area between the tire and the ground, effectively improving the friction and grip, and the greater friction can prevent wheel slip, ensuring the stability and safety of the forklift during driving, and avoiding accidents such as cargo falling or forklift rollover caused by wheel loss of control.

[0036] The high-strength aluminum alloy material of the outer layer has high thermal conductivity, and the heat generated by friction during the forklift operation can be quickly conducted out, avoiding the performance degradation or damage caused by high temperature inside, prolonging the service life of the bearing wheel set, the cast steel material of the inner layer has excellent strength, ensuring that the bearing wheel set will not deform or be damaged when bearing heavy goods, ensuring that the forklift can still run stably under heavy load, the two layers are fixedly connected through the support disc, further enhancing the stability of the structure, so that the whole bearing wheel set can work cooperatively.

[0037] The plurality of bend angle arc shafts are fixedly connected through the stress ring at the bending positions, which can effectively disperse stress and avoid damage caused by stress concentration, when the bearing wheel set bears heavy load or is subjected to uneven external force, the stress ring can uniformly distribute stress to each bend angle arc shaft set, improving the structural strength and reliability of the bearing wheel set, and ensuring that the forklift can safely and stably run under various harsh conditions. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a front view of the structure of the application.

[0039] Figure 2 It is a front view of the structure of the application.

[0040] Figure 3 It is a front view of the structure of the application.

[0041] Figure 4 It is a front view of the structure of the application.

[0042] Figure 5 It is a front view of the structure of the application.

[0043] Figure 6 It is an explosion view of the connecting part of the application.

[0044] Figure 7 It is a front view of the structure of the application.

[0045] Figure 8 It is a front view of the structure of the application.

[0046] Figure 9 It is an explosion view of the structure of the application.

[0047] Figure 10The figure is a schematic diagram of the folded corner arc axle assembly of the present application.

[0048] The figure shows: 1, steering assembly; 11, driving module; 2, steering control mechanism; 21, steering chassis; 22, central shaft; 23, connecting sleeve ring; 24, steering crankshaft; 25, groove; 26, rubber bushing; 27, steering connecting piece; 28, limiting bin; 29, steering wheel set; 210, bearing connecting piece; 211, support disc; 212, folded corner arc axle assembly; 213, stress ring; 214, bearing wheel set. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0050] It should be noted that the above-mentioned steering assembly and driving module and other devices are the internal structures of the forklift in the prior art, and their structure and working principle belong to the prior art, which will not be described here.

[0051] Embodiment 1: please refer to Figures 1 to 10 The figure shows a forklift steering control device, which comprises a steering assembly 1, a driving module 11 is installed below the steering assembly 1, and a steering control mechanism 2 is arranged below the driving module 11. The steering control mechanism 2 is used for flexible steering and automatically adapts to uneven road surface and steering impact.

[0052] It should be noted that the steering assembly 1 comprises a steering gear, a steering knuckle and a steering drag link, the steering drag link in the steering assembly 1 is rotatably connected with the steering crankshaft 24, and the steering drag link in the steering assembly 1 is used for transmitting steering force to make the steering knuckle and the steering wheel set 29 rotate. The driving module 11 comprises a driving motor, a motor controller and a main controller. The driving motor in the driving module 11 is responsible for converting electrical energy into mechanical energy, and the controller in the driving module 11 is responsible for adjusting the speed, torque and direction of the driving motor.

[0053] Please refer to Figures 1 to 10 The figure shows that the steering control mechanism 2 comprises a steering chassis 21 installed below the driving module 11, connecting sleeve rings 23 are symmetrically installed outside the steering chassis 21, steering crankshafts 24 are symmetrically installed outside the steering chassis 21, grooves 25 are symmetrically arranged inside the steering chassis 21, steering connecting pieces 27 are installed inside the grooves 25, steering wheel sets 29 are installed outside the steering connecting pieces 27, bearing connecting pieces 210 are symmetrically installed at both ends of the steering chassis 21, and bearing wheel sets 214 are installed outside the bearing connecting pieces 210.

[0054] It should be noted that the steering chassis 21 adopts metal skeleton material, the core frame of the steering chassis 21 is designed in an I shape, the steering chassis 21 is divided into front longitudinal axis, rear longitudinal axis and main transverse axis as a whole, and the middle shaft 22 is installed in the middle of the steering chassis 21, the middle shaft 22 is made of rubber material as a whole, the driving module 11 adopts modular design and is assembled on the frame of the steering chassis 21, the horizontal slots are formed in the positions of the side wall of 11 corresponding to 1, the limiting shafts are installed in the horizontal slots, 1 and 11 are connected through the horizontal slots and the limiting shafts, the connecting sleeve ring 23 is installed on the outer wall of the main transverse axis in the steering chassis 21, the steering chassis 21 is fixedly connected with the driving module 11 through the connecting sleeve ring 23, the connecting sleeve ring 23 is designed as an extensible structure, the steering crankshaft 24 is installed on the outer wall of the rear longitudinal axis in the steering chassis 21, the steering chassis 21 is rotationally connected with the steering assembly 1 through the steering crankshaft 24, the outer wall of the steering connecting piece 27 is installed with the rubber bushing 26, the steering connecting piece 27 is movably connected with the rear longitudinal axis of the steering chassis 21 through the rubber bushing 26, the rubber bushing 26 is used to further enhance the damping effect, the side of the steering connecting piece 27 away from the steering chassis 21 is designed in a Y shape, the limiting bin 28 is installed on the end of the steering connecting piece 27 away from the steering chassis 21, the end of the steering connecting piece 27 is slidably connected in the limiting bin 28, and the baffle is installed at the center position in the limiting bin 28.

[0055] Specifically, when the steering force is generated in the steering assembly 1, the steering force is transmitted to the steering crankshaft 24 through the steering drag link, and the steering chassis 21 is rotationally connected with the steering assembly 1 through the steering crankshaft 24, so that the steering force can be smoothly transmitted to the steering chassis 21, and the driving motor in the driving module 11 works under the control of the controller, the speed, torque and direction of the driving motor are adjusted, the electrical energy is converted into mechanical energy, so as to provide power for the operation of the steering control mechanism 2.

[0056] Since the middle shaft 22 in the middle of the steering chassis 21 is made of rubber material, when the forklift drives on uneven road or encounters steering impact, the middle shaft 22 can be elastically deformed to absorb vibration and impact energy, so that the steering chassis 21 can automatically adapt to the road conditions, ensure the stability and reliability of steering, and also reduce the damage to other parts.

[0057] When the steering force is transmitted to the steering connecting piece 27 through the steering chassis 21, the rubber bushing 26 mounted on the outer wall of the steering connecting piece 27 not only enhances the damping effect of force transmission between structures, but also enables the steering connecting piece 27 to be more flexible in active turning with the rear longitudinal shaft of the steering chassis 21. Since the side of the steering connecting piece 27 away from the steering chassis 21 is designed in a Y shape, when the steering wheel set 29 is adjusted to rotate, if the adjustment range is too large, the end head part of the steering connecting piece 27 slides in the limiting bin 28, and the force of the end head finally acts on the baffle at the center position inside the limiting bin 28, so that the steering forms a closed loop to limit the steering angle, ensuring the stability and safety of steering.

[0058] Embodiment 2: Based on Embodiment 1, please refer to Figures 1 to 10 As shown in the figure, the steering wheel set 29 is installed outside the rear longitudinal shaft in the steering chassis 21, and the load wheel set 214 is installed outside the front longitudinal shaft in the steering chassis 21. The surface of the load wheel set 214 is uniformly provided with arc-shaped blocks, and the middle protruding part of the arc-shaped blocks will deform to form the same horizontal plane with the two sides when being pressed, so as to increase the friction and grip force with the ground. The load wheel set 214 adopts a double-layer composite structure, the outer layer is made of high-strength aluminum alloy material for providing good heat dissipation performance, and the inner layer is made of cast steel material for ensuring sufficient strength and carrying capacity. The two layers of the load wheel set 214 are fixedly connected through the support disc 211. The inside of the load wheel set 214 is uniformly provided with the corner arc shaft set 212, and the curved parts of the plurality of corner arc shaft sets 212 are fixedly connected with the stress ring 213.

[0059] Specifically, the load wheel set 214 is installed outside the front longitudinal shaft of the steering chassis 21 and is responsible for bearing the weight of the forklift and the loaded goods, which is an important supporting component for stable driving of the forklift.

[0060] When the forklift drives with load, especially in the case of uneven road surface, climbing or turning, the middle protruding part of the arc-shaped blocks uniformly installed on the surface of the load wheel set 214 is pressed until the arc-shaped blocks deform to form the same horizontal plane with the two sides. Through this deformation, the contact area between the tire and the ground is increased, thereby significantly increasing the friction and grip force to prevent the load wheel set 214 from slipping.

[0061] And the double-layer composite structure adopted by the load wheel set 214 takes into account the two key performances of heat dissipation and strength bearing. First, the outer layer of high-strength aluminum alloy material has good thermal conductivity. During the long-time operation of the forklift, heat will be generated by the friction between the load wheel set 214 and the ground and the operation of the internal components. The aluminum alloy outer layer can quickly conduct these heat away and effectively reduce the temperature, avoiding performance degradation and component damage caused by high temperature, and prolonging the service life of the load wheel set 214. Second, the inner layer of cast steel material has excellent strength, providing sufficient load-bearing capacity for the load wheel set 214, ensuring that it will not deform or be damaged when bearing the heavy weight of the forklift and goods, and ensuring that the forklift can still run stably under heavy load. In addition, the two layers are fixedly connected through the support disc 211, enhancing the stability of the structure and enabling the inner and outer layers to work together to cope with various complex working conditions.

[0062] At the same time, the double-layer composite structure of the load wheel set 214 also introduces the corner arc shaft set 212. The corner arc shaft set 212 can absorb energy through its bending deformation, reducing the impact on the entire load wheel set 214 and the forklift chassis. In addition, the bending part of the corner arc shaft set 212 is fixedly connected with the stress ring 213, which further enhances the structural strength of the load wheel set 214. When the load wheel set 214 bears heavy load or is subjected to uneven external force, the stress ring 213 can evenly distribute stress to each corner arc shaft, avoiding component damage caused by stress concentration and ensuring that the load wheel set 214 can safely and stably operate under harsh conditions, providing reliable protection for the normal operation of the forklift.

[0063] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A forklift truck steering control device, comprising a steering assembly (1), a drive module (11) is installed below the steering assembly (1), characterized in that: The lower part of the driving module (11) is provided with a steering control mechanism (2), which is used for flexible steering and automatically adapts to road unevenness and steering impact; the steering control mechanism (2) comprises a steering chassis (21) installed below the driving module (11), a connecting sleeve ring (23) is symmetrically installed on the outer part of the steering chassis (21), a steering crankshaft (24) is symmetrically installed on the outer part of the steering chassis (21), a groove (25) is symmetrically formed in the inner part of the steering chassis (21), a steering connecting piece (27) is installed in the inner part of the groove (25), a steering wheel set (29) is installed on the outer part of the steering connecting piece (27), and a bearing connecting piece (210) is symmetrically installed at both ends of the steering chassis (21); a bearing wheel set (214) is installed on the outer part of the bearing connecting piece (210); The steering chassis (21) is made of metal framework material, the core frame of the steering chassis (21) is designed in an I-shaped form, the steering chassis (21) is divided into a front longitudinal shaft, a rear longitudinal shaft and a main transverse shaft as a whole, a middle shaft piece (22) is installed in the middle part of the steering chassis (21), the middle shaft piece (22) is made of rubber material as a whole, the driving module (11) is designed in a modular form and assembled on the frame of the steering chassis (21), horizontal grooves are formed in the positions of the side walls of the driving module (11) corresponding to the steering assembly (1), limit shafts are installed in the horizontal grooves, and the steering assembly (1) and the driving module (11) are in sliding connection through the horizontal grooves and the limit shafts; The connecting sleeve ring (23) is installed on the outer wall of the main transverse shaft in the steering chassis (21), the steering chassis (21) is in fixed connection with the driving module (11) through the connecting sleeve ring (23), the connecting sleeve ring (23) is designed in a telescopic structure, the steering crankshaft (24) is installed on the outer wall of the rear longitudinal shaft in the steering chassis (21), and the steering chassis (21) and the steering assembly (1) are in rotary connection through the steering crankshaft (24); The outer wall of the steering connecting piece (27) is provided with a rubber bushing (26), and the steering connecting piece (27) is movably connected with the rear longitudinal shaft of the steering chassis (21) through the rubber bushing (26); The side of the steering connecting piece (27) away from the steering chassis (21) is designed in a Y-shaped form, limit bins (28) are installed on the end of the steering connecting piece (27) away from the steering chassis (21), the end of the steering connecting piece (27) is in sliding connection with the inner part of the limit bin (28), and a baffle is installed at the central position in the inner part of the limit bin (28); The steering assembly (1) comprises a steering gear, a steering knuckle and a steering drag link, the steering drag link in the steering assembly (1) is in rotary connection with the steering crankshaft (24), and the steering drag link in the steering assembly (1) is used for transmitting steering force to make the steering knuckle and the steering wheel set (29) rotate. The driving module (11) comprises a driving motor, a motor controller and a main controller, the driving motor in the driving module (11) is responsible for converting electric energy into mechanical energy, and the controller in the driving module (11) is responsible for adjusting the rotating speed, torque and direction of the driving motor.

2. A forklift truck steering control device according to claim 1, characterised in that: The steering wheel group (29) is installed outside the rear longitudinal shaft in the steering chassis (21), the load wheel group (214) is installed outside the front longitudinal shaft in the steering chassis (21), the surface of the load wheel group (214) is uniformly provided with arc-shaped blocks, and the middle protruding part of the arc-shaped blocks is deformed to form the same horizontal plane with the two sides when being pressed, so that the friction and the gripping force with the ground are increased.

3. The control device for a forklift truck according to claim 1, wherein: The load wheel group (214) adopts a double-layer composite structure, the outer layer is made of high-strength aluminum alloy material and is used for providing good heat dissipation performance, and the inner layer is made of cast steel material and is used for guaranteeing sufficient strength and load capacity, and the two layers of the load wheel group (214) are fixedly connected through the supporting disc (211).

4. The fork truck steering control device of claim 1 wherein: The inside of the load wheel group (214) is uniformly provided with the angle arc shaft group (212), and the bending part of the angle arc shaft group (212) is fixedly connected with the stress ring (213).

Images