Double-rotation-support driven wheel mechanism applied to forklift

Abstract

The utility model discloses a double rotation support driven wheel mechanism applied to a forklift, which relates to the technical field of forklifts, and comprises a forklift body, a driving wheel set, a steering wheel set and two driven wheel sets, the driving wheel set is fixedly arranged at the right rear part of the forklift body, the steering wheel set is fixedly arranged at the left front part of the forklift body, the number of the driven wheel sets is two, and the two driven wheel sets are arranged on the forklift body. The two driven wheel sets are the first wheel set and the second wheel set, the first wheel set is arranged on the right front portion of the vehicle body, the second wheel set is arranged on the left rear portion of the vehicle body, the driven wheel set comprises a driven wheel frame, a driven wheel body, a first rotation support, a second rotation support and a connecting plate, and the driven wheel body is arranged in the driven wheel frame in a matched mode; due to the fact that the two driven wheel sets are distributed in the front-back direction and arranged in the diagonal mode, and the first rotary supports and the second rotary supports are arranged in the driven wheel sets, the stability of the forklift in the turning process is remarkably improved, the drifting phenomenon is reduced, and therefore safe carrying of goods and protection of surrounding facilities are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fork truck, concretely relates to a double-rotation supporting driven wheel mechanism applied to fork truck. BACKGROUND

[0002] With the increasingly nervous domestic land resources, land price is rising unceasingly, the requirement of warehouse space utilization rate is also higher and higher. In order to improve the storage capacity of warehouse, increase the placing quantity of goods shelf becomes inevitable choice, this leads to the distance of passageway between goods shelves to become increasingly narrow. In such environment, the performance of the walking wheel mechanism of fork truck is particularly important.

[0003] The existing fork truck walking wheel mechanism mainly has two forms: one is double-drive double-steering form, although the control performance of this form is good, but the cost is high, increases the purchase and operation cost of enterprise;The other is single-drive single-steering plus universal wheel form, this form has obvious defects, when turning, the tail swing phenomenon is prone to appear, the stability of vehicle is poor, not only influences the efficiency of goods handling, but also can cause damage to goods and surrounding facilities, at the same time, also reduces the operation experience and safety of driver. SUMMARY

[0004] The utility model aims at at least one of the technical problems in prior art. For this purpose, the utility model provides a double-rotation supporting driven wheel mechanism applied to fork truck to improve the operation performance of fork truck in narrow passageway.

[0005] To achieve the above-mentioned purpose, according to the first aspect of the utility model embodiment, a double-rotation supporting driven wheel mechanism applied to fork truck is provided, including car body, drive wheel group, steering wheel group and driven wheel group, the drive wheel group is fixedly arranged at the right rear of car body, the steering wheel group is fixedly arranged at the left front of car body, the driven wheel group is provided with two groups, and is first wheel group and second wheel group respectively, the first wheel group is arranged at the right front of car body, the second wheel group is arranged at the left rear of car body, the driven wheel group includes driven wheel frame, driven wheel body, first rotation support, second rotation support and connecting plate, the driven wheel body is matched and arranged in the driven wheel frame, the bottom of second rotation support is fixedly connected with driven wheel frame, the top of second rotation support and the bottom of first rotation support are all fixedly connected with connecting plate, and the top of first rotation support is fixedly connected with car body. The axis of first rotation support and the axis of second rotation support are parallel to each other and do not coincide.

[0006] As a further scheme of the utility model: the top of connecting plate is fixedly provided with mounting shaft, the bottom of first rotation support is fixedly connected with mounting shaft, the bottom of connecting plate is provided with mounting groove, and the top of second rotation support is fixedly connected with mounting groove. The mounting shaft is integrally formed with connecting plate.

[0007] As a further scheme of the utility model: the vehicle body includes a vehicle body and a swing bridge, a through slot is formed in the rear end of the vehicle body, the swing bridge is rotatably arranged in the through slot, the driving wheel set is fixedly connected with one end of the swing bridge, and the second wheel set is fixedly connected with the other end of the swing bridge. The driving wheel set is located at the right end of the swing bridge, and the second wheel set is located at the left end of the swing bridge. A rotating shaft in a horizontal state is fixedly arranged in the through slot, and a rotating groove that rotates with the rotating shaft is formed in the side of the swing bridge.

[0008] As a further scheme of the utility model: the driving wheel set includes a driving wheel frame, a driving wheel body, a steering motor, a driving gear and a driven gear, the driving wheel frame is rotatably connected with the vehicle body, the driving wheel body is arranged in the driving wheel frame in a matched mode, the steering motor is fixedly connected with the vehicle body, the driving gear is fixedly connected with the output end of the steering motor, the driven gear is fixedly connected with the driving wheel frame, and the driving gear is engaged with the driven gear. The diameter of the driven gear is greater than that of the driving gear.

[0009] As a further scheme of the utility model: detection electrical elements for detecting the rotating speed and the steering angle are arranged in the driving wheel set and the steering wheel set.

[0010] The utility model has the beneficial effects that compared with the prior art:

[0011] 1. The two sets of driven wheel sets are distributed in front of and behind the vehicle body and are arranged in a diagonal line, and the first rotary support and the second rotary support in the driven wheel set significantly improve the stability of the forklift when turning, reduce the fishtailing phenomenon, and thus ensure the safe carrying of goods and the protection of surrounding facilities.

[0012] 2. The two sets of driven wheel sets are distributed in front of and behind the vehicle body and are arranged in a diagonal line, so that the forklift can more flexibly adjust the posture of the vehicle body when turning, reduce the turning radius, and improve the operation flexibility in a narrow space. In addition, the driven wheel sets are distributed in front of and behind the two sides of the vehicle body, forming a stable quadrilateral support structure. This structure can effectively prevent the vehicle body from tilting during the driving of the forklift, especially when driving at high speed or carrying heavy objects, and can provide better stability.

[0013] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0014] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0015] Figure 1 It is a three-dimensional structure schematic view of a double-rotation support driven wheel mechanism applied to a forklift.

[0016] Figure 2 It is a structure schematic view of a vehicle body in the utility model.

[0017] Figure 3 It is a three-dimensional structure schematic view of a driving wheel set in the utility model.

[0018] Figure 4 It is a structure sectional view of a driven wheel set in the utility model.

[0019] The reference signs include:

[0020] 1, vehicle body; 2, driving wheel set; 3, steering wheel set; 4, driven wheel set; 5, first wheel set; 6, second wheel set; 7, driven wheel frame; 8, driven wheel body; 9, first rotation support; 10, second rotation support; 11, connecting plate; 12, mounting shaft; 13, mounting groove; 14, vehicle body; 15, swing bridge frame; 16, through groove; 17, driving wheel frame; 18, driving wheel body; 19, steering motor; 20, driving gear; 21, driven gear. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] As Figures 1 to 4As shown, a double-rotation support driven wheel mechanism applied to a forklift truck, comprising a vehicle body 1, a driving wheel group 2, a steering wheel group 3 and a driven wheel group 4, the driving wheel group 2 is fixedly arranged at the right rear of the vehicle body 1, the steering wheel group 3 is fixedly arranged at the left front of the vehicle body 1, the driven wheel group 4 is provided with two groups, which are a first wheel group 5 and a second wheel group 6 respectively, the first wheel group 5 is arranged at the right front of the vehicle body 1, and the second wheel group 6 is arranged at the left rear of the vehicle body 1. During the driving process of the forklift truck, the driving wheel group 2 and the steering wheel group 3 are responsible for providing power and controlling the driving direction of the forklift truck, and such arrangement ensures the basic maneuverability of the forklift truck during straight driving and turning. At the same time, the two groups of driven wheel groups 4 are distributed in front of and behind the vehicle body 1 and arranged in a diagonal line, so that the forklift truck can more flexibly adjust the attitude of the vehicle body 1 when turning, reduce the turning radius and improve the operation flexibility in a small space. In addition, the driven wheel groups 4 are distributed in front of and behind the two sides of the vehicle body 1, forming a stable quadrilateral support structure, which can effectively prevent the vehicle body 1 from tilting during the driving process of the forklift truck, especially when driving at high speed or carrying heavy objects, which can provide better stability.

[0023] The driven wheel group 4 comprises a driven wheel frame 7, a driven wheel body 8, a first rotation support 9, a second rotation support 10 and a connecting plate 11, the driven wheel body 8 is matchedly arranged in the driven wheel frame 7, the bottom of the second rotation support 10 is fixedly connected with the driven wheel frame 7, the top of the second rotation support 10 and the bottom of the first rotation support 9 are both fixedly connected with the connecting plate 11, and the top of the first rotation support 9 is fixedly connected with the vehicle body 1. The axis of the first rotation support 9 and the axis of the second rotation support 10 are parallel to each other and do not coincide, so that the driven wheel group 4 produces a certain rotation angle when the forklift truck turns, thereby maintaining the stability of the vehicle body 1. Specifically, when the forklift truck turns, the connecting plate 11 can rotate to a certain extent through the first rotation support 9, and the driven wheel frame 7 and the driven wheel body 8 can further rotate to a certain extent through the second rotation support 10, so as to adapt to the turning requirement of the vehicle body 1. Such rotation not only reduces the tilting moment when turning, but also improves the stability and maneuverability of the forklift truck, avoiding the occurrence of fishtailing.

[0024] The utility model discloses through two groups of driven wheel groups 4 front and rear distribution and diagonal line's configuration and the first rotation support 9 and the second rotation support 10 in driven wheel group 4, significantly improved the stability of forklift truck when turning, reduced fishtailing, thereby guarantee the safe handling of goods and the protection of surrounding facilities.

[0025] Reference Figure 4As shown, in some specific embodiments, the top of the connecting plate 11 is fixedly provided with a mounting shaft 12, the bottom of the first rotary support 9 is fixedly connected with the mounting shaft 12, the bottom of the connecting plate 11 is provided with a mounting groove 13, and the top of the second rotary support 10 is fixedly connected with the mounting groove 13. By providing the mounting shaft 12 and the mounting groove 13 on the connecting plate 11, the first rotary support 9 and the second rotary support 10 can be conveniently and quickly mounted and dismounted. This not only improves the maintenance efficiency, but also reduces the maintenance cost. The mounting shaft 12 is integrally formed with the connecting plate 11, thereby avoiding the problem of unstable structure caused by loose or damaged connecting parts. At the same time, the first rotary support 9 is directly fixed on the mounting shaft 12, thereby improving the stability and durability thereof.

[0026] Reference Figure 2 As shown, in some specific embodiments, the vehicle body 1 comprises a vehicle body 14 and a swing bridge 15, the rear end of the vehicle body 14 is provided with a through groove 16, the swing bridge 15 is rotatably arranged in the through groove 16, the driving wheel set 2 is fixedly connected with one end of the swing bridge 15, and the second wheel set 6 is fixedly connected with the other end of the swing bridge 15. The driving wheel set 2 is located at the right end of the swing bridge 15, and the second wheel set 6 is located at the left end of the swing bridge 15. A rotating shaft in a horizontal state is fixedly arranged in the through groove 16, and a rotating groove that rotates with the rotating shaft is arranged in the side of the swing bridge 15.

[0027] The swing bridge 15 enables the driving wheel set 2 and the second wheel set 6 to rotate within a certain range, thereby increasing the operational flexibility of the forklift in a narrow space. In particular, when making a sharp turn or reversing, this can significantly reduce the turning radius and improve the work efficiency.

[0028] Reference Figure 3 As shown, in some specific embodiments, the driving wheel set 2 comprises a driving wheel frame 17, a driving wheel body 18, a steering motor 19, a driving gear 20, and a driven gear 21, the driving wheel frame 17 is rotatably connected with the vehicle body 1, the driving wheel body 18 is arranged in the driving wheel frame 17 in a matched manner, the steering motor 19 is fixedly connected with the vehicle body 1, the driving gear 20 is fixedly connected with the output end of the steering motor 19, the driven gear 21 is fixedly connected with the driving wheel frame 17, and the driving gear 20 is engaged with the driven gear 21. The diameter of the driven gear 21 is greater than that of the driving gear 20.

[0029] When the forklift needs to turn, the steering motor 19 drives the driving gear 20 to rotate, thereby driving the driven gear 21 to rotate, and further driving the driving wheel frame 17 and the driving wheel body 18 to rotate together. Since the diameter of the driven gear 21 is greater than that of the driving gear 20, the effect of speed reduction and torque increase is achieved.

[0030] In some specific embodiments, detection electrical elements (not shown in the figure) for detecting the rotation speed and the steering angle are installed in the driving wheel group 2 and the steering wheel group 3, including a speed sensor and a potentiometric steering angle sensor.

[0031] Specifically, the working principle of the speed sensor is to install a signal wheel with a tooth groove on the rotating part of the driving wheel group 2 and the steering wheel group 3, and there is an induction coil and a permanent magnet inside the speed sensor. When the driving wheel group 2 and the steering wheel group 3 rotate, the tooth groove of the signal wheel constantly passes through the speed sensor, causing the magnetic field around the induction coil to change periodically, thereby generating an induced electromotive force in the coil. The frequency of this induced electromotive force is proportional to the wheel speed, and by detecting the frequency of the induced electromotive force, the speed of the driving wheel group 2 and the steering wheel group 3 can be calculated. The speed data is transmitted to the control system of the forklift in real time, and the control system can adjust the power output of the driving wheel group 2 according to the preset speed value, achieving precise speed control.

[0032] The potentiometric steering angle sensor is composed of a rotatable brush and a fixed resistor. When the driving wheel group 2 and the steering wheel group 3 rotate, the brush rotates with it, changing its contact position on the resistor and thus changing the resistance value. Since the change in resistance value is linearly related to the steering angle, by measuring the resistance value, the precise steering angle of the steering wheel can be obtained. The control system can achieve precise steering of the whole vehicle by combining the steering operation of the driving wheel group 2 according to this steering angle information.

[0033] In order to facilitate the understanding of the working principle of the embodiments of the present scheme by those skilled in the art, the working principle of the embodiments of the present scheme will be described in combination with specific application scenarios:

[0034] During driving, the driving wheel group 2 and the steering wheel group 3 are responsible for providing power and controlling the driving direction of the forklift, which ensures the basic maneuverability of the forklift during straight driving and steering. At the same time, the two groups of driven wheels 4 are distributed in front and back and diagonally, which makes the forklift more flexible in adjusting the attitude of the vehicle body 1 when turning, reducing the turning radius and improving the operation flexibility in narrow spaces. In addition, the driven wheels 4 are distributed in front and back on both sides of the vehicle body 1, forming a stable quadrilateral support structure, which can effectively prevent the vehicle body 1 from tilting during driving, especially at high speed or when carrying heavy loads, providing better stability.

[0035] When the forklift turns, the connecting plate 11 can rotate to a certain extent through the first slewing support 9, and the driven wheel frame 7 and the driven wheel body 8 can further rotate to a certain extent through the second slewing support 10, so as to adapt to the turning requirement of the vehicle body 1. Such rotation not only reduces the roll moment when turning, but also improves the stability and maneuverability of the forklift, and avoids the occurrence of tail swing phenomenon.

[0036] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A double-rotation support driven wheel mechanism applied to a fork truck, characterized by, The utility model provides a kind of vehicle, including car body (1), drive wheel group (2), steering wheel group (3) and driven wheel group (4), the drive wheel group (2) is fixedly arranged in the right rear of car body (1), the steering wheel group (3) is fixedly arranged in the left front of car body (1), and the driven wheel group (4) is provided with two groups, and first wheel group (5) and second wheel group (6) are respectively, the first wheel group (5) is arranged in the right front of car body (1), and the second wheel group (6) is arranged in the left rear of car body (1), and the driven wheel group (4) includes driven wheel frame (7), driven wheel body (8), first rotary support (9), second rotary support (10) and connecting plate (11), the driven wheel body (8) is cooperatively arranged in driven wheel frame (7), the bottom of second rotary support (10) is fixedly connected with driven wheel frame (7), the top of second rotary support (10) and the bottom of first rotary support (9) are all fixedly connected with connecting plate (11), and the top of first rotary support (9) is fixedly connected with car body (1).

2. The dual-rotation support driven wheel mechanism for a fork truck according to claim 1, wherein The axis of the first rotary support (9) is parallel to the axis of the second rotary support (10) and does not coincide.

3. The dual-rotation support driven wheel mechanism for a fork truck according to claim 1, wherein The top of the connecting plate (11) is fixedly provided with a mounting shaft (12), the bottom of the first rotary support (9) is fixedly connected with the mounting shaft (12), the bottom of the connecting plate (11) is provided with a mounting slot (13), and the top of the second rotary support (10) is fixedly connected with the mounting slot (13).

4. The dual-rotation support driven wheel mechanism for a fork truck according to claim 3, wherein The mounting shaft (12) is integrally formed with the connecting plate (11).

5. The dual-rotation support driven wheel mechanism for a fork truck of claim 1, wherein, The car body (1) includes a vehicle body (14) and a swing bridge frame (15), the rear end of the vehicle body (14) is provided with a through slot (16), the swing bridge frame (15) is rotatably arranged in the through slot (16), the drive wheel group (2) is fixedly connected with one end of the swing bridge frame (15), and the second wheel group (6) is fixedly connected with the other end of the swing bridge frame (15).

6. A dual-rotation support driven wheel mechanism for a fork truck as defined in claim 5 wherein, The drive wheel group (2) is located at the right end of the swing bridge frame (15), and the second wheel group (6) is located at the left end of the swing bridge frame (15).

7. The dual-rotation support driven wheel mechanism for a fork truck of claim 5, wherein, A rotating shaft in a horizontal state is fixedly arranged in the through slot (16), and a rotating groove that rotates with the rotating shaft is formed in the side of the swing bridge frame (15).

8. The dual-rotation support driven wheel mechanism for a fork truck of claim 1, wherein, The drive wheel group (2) includes a drive wheel frame (17), a drive wheel body (18), a steering motor (19), a driving gear (20), and a driven gear (21), the drive wheel frame (17) is rotatably connected with the car body (1), the drive wheel body (18) is cooperatively arranged in the drive wheel frame (17), the steering motor (19) is fixedly connected with the car body (1), the driving gear (20) is fixedly connected with the output end of the steering motor (19), the driven gear (21) is fixedly connected with the drive wheel frame (17), and the driving gear (20) is engaged with the driven gear (21).

9. A dual-rotation support driven wheel mechanism for a fork truck as defined in claim 8 wherein, The diameter of the driven gear (21) is greater than the diameter of the driving gear (20).

10. The dual-rotation support driven wheel mechanism for a fork truck of claim 1, wherein, Detection electrical elements for detecting the rotating speed and the steering angle are installed in the drive wheel group (2) and the steering wheel group (3).

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