All-wheel braking system and counterbalance forklift truck

Abstract

The utility model relates to the technical field of forklifts, and discloses an all-wheel braking system and a counterbalance forklift, which comprise a driving motor, a first electromagnetic brake, a driving axle assembly, a driving wheel, a traveling pedal braking component, a steering motor, a second electromagnetic brake, a steering axle assembly, a driving wheel and the like. The first electromagnetic brake is arranged on the driving motor, and meanwhile, the second electromagnetic brake is arranged at the position of the steering wheel, so that four-wheel stable all-wheel braking of the forklift can be realized no matter in a manual driving mode or an automatic control mode, and the safety of the driving and parking process of the forklift is improved. And meanwhile, the encoder is additionally arranged in the motor, so that the accuracy and the reliability of vehicle operation are improved. And meanwhile, the two modes of manual driving and automatic control can be compatible, the use purpose of the forklift is expanded, and one machine with two purposes is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a forklift technical field, concretely relates to a full wheel brake system and a counterbalance forklift. BACKGROUND

[0002] The counterbalance forklift is a common industrial handling vehicle, and its design feature is that a counterweight is installed at the tail of the vehicle body to offset the weight of goods and maintain the stability of the vehicle during handling. The main components of the counterbalance forklift include a power device, a transmission device, a steering device, a hydraulic system, a brake device, and a counterweight. With the deepening of the new energy process, new energy forklifts have also gradually been put into use.

[0003] Currently, the battery forklifts on the market are mainly driven forward by a motor driving axle assembly, the brake system of the forklift mainly drives the brake hydraulic pump to brake the wheel hub of the wheel through the running foot pedal brake system, and the parking function is mainly realized by the hand brake parking brake system to brake the wheel hub of the driving wheel. The rear axle assembly usually only has a steering function and does not have a braking function. This braking mode cannot effectively ensure the safety of personnel and property on some dangerous roads with small friction coefficients or in some high braking requirement emergency working conditions, and this braking system is only suitable for manual driving control work and cannot replace manual work after the AGV body is modified. However, with the substantial increase in labor costs and the increase in labor intensity, the market demand for intelligent control forklifts is increasing today, and there is an urgent need for dual-mode control forklifts that can be manually controlled and automatically controlled.

[0004] The utility model relates to a forklift technical field, concretely relates to a full wheel brake system and a counterbalance forklift.

[0005] The utility model solves the technical problem that the existing battery forklift brake system cannot effectively ensure the safety of personnel and property on some dangerous roads with small friction coefficients or in some high braking requirement emergency working conditions, and this braking system is only suitable for manual driving control work and cannot replace manual work after the AGV body is modified. However, with the substantial increase in labor costs and the increase in labor intensity, the market demand for intelligent control forklifts is increasing today, and there is an urgent need for dual-mode control forklifts that can be manually controlled and automatically controlled.

[0006] The purpose of the utility model can be realized by the following technical schemes.

[0007] A full wheel brake system, comprising:

[0008] A controller;

[0009] A running foot pedal brake assembly connected with the controller;

[0010] The drive axle assembly comprises a drive axle assembly, drive wheels, a drive motor and a first electromagnetic brake, the drive wheels are rotationally arranged at two ends of the drive axle assembly, the drive motor is fixedly arranged on the drive axle assembly, and the first electromagnetic brake is arranged on the drive motor and connected with the controller.

[0011] The steering axle assembly comprises a steering axle assembly, steering wheels and a steering motor, the steering motor is fixedly arranged on the steering axle assembly and used for driving the steering wheels to steer, and a second electromagnetic brake is arranged on the steering wheels and connected with the controller.

[0012] In one scheme of the utility model, the first electromagnetic brake is arranged at the tail end of the drive motor.

[0013] In one scheme of the utility model, the steering wheel is rotationally matched with a steering support, and a driving gear of the steering motor is drivingly connected with the steering support.

[0014] In one scheme of the utility model, the stator of the second electromagnetic brake is fixedly arranged on the steering support, and the rotor is arranged on the hub of the steering wheel.

[0015] In one scheme of the utility model, a rotary support is arranged between the steering support and the steering axle assembly.

[0016] In one scheme of the utility model, an encoder is arranged in the drive motor.

[0017] In one scheme of the utility model, an encoder is arranged in the steering motor.

[0018] In one scheme of the utility model, the driving pedal brake assembly comprises a brake pedal and an analog switch.

[0019] The utility model discloses a balanced heavy fork truck, comprising a full-wheel brake system as described above.

[0020] In one scheme of the utility model, before the controller controls the drive electromagnetic brake and the steering wheel second electromagnetic brake to brake, the controller controls the drive motor to apply reverse torque to reduce speed.

[0021] The utility model has the advantages of the following:

[0022] The application sets the first electromagnetic brake on the driving motor and the second electromagnetic brake on the steering wheel position, so that the forklift four-wheel stable full-wheel braking can be realized in the manual driving mode or the automatic control mode, and the safety of the forklift driving and parking process is increased.

[0023] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0025] Fig. 1 is a structural schematic view of the whole of the balance weight type forklift truck of the present application;

[0026] Fig. 2 is a structural schematic view of the driving axle assembly of the present application;

[0027] Fig. 3 is a structural schematic view of the steering axle assembly of the present application.

[0028] The reference signs in the drawings are:

[0029] 10, driving axle assembly; 11, first electromagnetic brake; 12, driving motor; 13, driving wheel; 14, driving axle assembly;

[0030] 20, driving foot pedal brake assembly;

[0031] 30, steering axle assembly; 31, steering motor; 32, steering axle assembly; 33, slewing support; 34, steering support; 35, second electromagnetic brake; 36, steering wheel; 37, driving gear. DETAILED DESCRIPTION

[0032] Clearly and completely describe the technical scheme in the embodiments of the utility model with the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0033] In the description of the utility model, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, structure and operation, therefore, it cannot be understood as the limitation of the utility model.

[0034] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. is understood as not including the number, above, below, etc. is understood as including the number. If the first and the second are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or the sequence of the indicated technical features.

[0035] Please refer to Figs. 1-3The utility model discloses a kind of all-wheel brake systems and counterbalanced fork truck, comprising: controller, driving footboard brake assembly 20, drive axle assembly 10, steering axle assembly 30;The driving footboard brake assembly 20 is connected with the controller;The drive axle assembly 10 includes drive axle assembly 14, driving wheel 13, drive motor 12 and first electromagnetic brake 11, the driving wheel 13 rotation is arranged at the both ends of the drive axle assembly 14, the drive motor 12 is fixedly installed and arranged on the drive axle assembly 14, the first electromagnetic brake 11 is arranged on the drive motor 12, and is connected with the controller;The steering axle assembly 30 includes steering axle assembly 32, steering wheel 36 and steering motor 31, the steering motor 31 is fixedly arranged on the steering axle assembly 32, for driving the steering wheel 36 steering, second electromagnetic brake 35 is provided on the steering wheel 36, and the second electromagnetic brake 35 is connected with the controller.The first electromagnetic brake 11 is arranged at the tail end of the drive motor 12.The steering wheel 36 is rotationally cooperated with steering support 34, and the drive gear of the steering motor 31 is drivingly connected with the steering support 34.The stator of the second electromagnetic brake 35 is fixedly arranged on steering support 34, and the rotor is installed on the hub of steering wheel 36.The steering support 34 is provided with rotary support between the steering axle assembly 32.The drive motor is provided with encoder.The steering motor is provided with encoder.The driving footboard brake assembly 20 includes brake pedal and analog switch.

[0036] Please refer to Figs. 1-3 As an example, specifically, the all-wheel brake system includes drive motor 12, first electromagnetic brake 11, drive axle assembly 14, driving wheel 13, driving footboard brake assembly 20, steering motor 31, second electromagnetic brake 35, steering axle assembly 32, rotary support 33, steering support 34, driving wheel 13, drive gear 37 etc.The first electromagnetic brake 11 is fixed by screw coupling at the tail end of drive motor 12, and the front end of drive motor 12 is fixed by screw at the input end of drive axle assembly 14, and two driving wheels 13 are fixed by screw at the both ends of drive axle assembly 14.The driving footboard brake assembly 20 can be fixed by screw at the front of fork truck body, and manual operation is facilitated.The stator of the second electromagnetic brake 35 in the position of steering wheel 36 is installed by screw on the vertical plate of steering support 34, and the rotor of the electromagnetic brake of steering wheel 36 is fixed by screw on the hub of steering wheel 36.The steering motor 31 is installed on the upper plate of steering axle assembly 32, the drive gear 37 is fixed by screw on the output shaft of steering motor 31, the upper end of rotary support 33 is fixed by screw with steering axle assembly 32, and the lower end is installed by screw coupling on the upper plate of rotary wheel frame, and the steering wheel 36 is fixed by bearing on the support shaft of steering support 34.

[0037] The working principle of the utility model discloses:

[0038] The balanced counterbalanced forklift truck includes drive axle assembly 10, driving foot pedal brake assembly 20, steering axle assembly 30 and the like. Among them, the drive axle assembly 10 includes drive motor 12 and first electromagnetic brake 11, drive axle assembly 14, two drive wheels 13. Drive axle assembly 10 not only is provided with traditional driving foot pedal brake assembly 20, but also is arranged with first electromagnetic brake 11 at the tail of drive motor 12 in drive axle assembly 10, and by being provided with first electromagnetic brake 11 at drive motor 12, the driving and parking brake function of the front two drive wheels 13 can be realized in automatic mode. In manual mode, first electromagnetic brake 11 can be used to assist braking of drive wheel 13. Meanwhile, drive motor 12 is built-in with encoder, and the distance of drive motor 12 can be monitored in real time through the calculation of transmission ratio, the precision of forklift operation is improved, and the accurate control of two front drive wheels 13 is realized.

[0039] The steering axle assembly 30 includes steering motor 31, steering axle assembly 32, slewing support, steering support 34, second electromagnetic brake 35, steering wheel 36, drive gear 37 and the like. The rear steering axle assembly 30 includes two steering wheels 36, the two steering wheels 36 are controlled by corresponding steering motor 31 respectively, and each steering wheel 36 hub is provided with second electromagnetic brake 35. By installing a second electromagnetic brake 35 between steering wheel 36 and steering support 34, each steering wheel 36 can be independently braked. The stator of second electromagnetic brake 35 is fixed on steering support 34, and the rotor part is installed on the hub of steering wheel 36, and through the on-off and analog control of second electromagnetic brake 35, the different brake torque control of steering wheel 36 can be realized.

[0040] The steering wheel 36, drive wheel 13 and their assemblies in the application all have braking function, and the front drive axle assembly 10 is provided with two kinds of braking systems, one is driving foot pedal brake assembly 20, and the other is first electromagnetic brake 11 arranged at the tail of drive motor 12. Thus, the compatibility of manual driving and automatic control two modes can be realized.

[0041] In manual driving mode, driving foot pedal brake assembly 20 is responsible for the main braking function of front drive wheel 13, and first electromagnetic brake 11 at the tail of drive motor 12 and second electromagnetic brake 35 of steering wheel 36 realize the braking function of drive wheel 13 and steering wheel 36 simultaneously under the control of control system (PLC controller can be selected). Among them, the brake pedal of driving foot pedal brake assembly 20 is provided with analog switch, when the driver steps on the brake pedal, the control system can control the suction force of second electromagnetic brake 35 on steering wheel 36 according to the change of pedal angle to realize different brake torque.

[0042] Specifically, when the artificial brake pedal is stepped on, the driving foot pedal brake assembly 20 can perform the driving main brake function on the two driving wheels 13 of the drive axle assembly 10, and under the control of the control system, the analog switch on the pedal controls the control of the reverse thrust torque of the driving motor 12 through the angle change, so as to reduce the driving wheel 13 to a certain speed, and the first electromagnetic brake 11 controls the front two driving wheels 13 through the driving axle assembly 14 to perform auxiliary braking, and the rear steering axle assembly 30 two steering second electromagnetic brakes 35 control the two steering wheels 36 to perform driving braking under the control of the control system through the pedal angle change.

[0043] When parking, the control system controls the first electromagnetic brake 11 and the second electromagnetic brake 35 of the rear steering wheel 36 to brake the driving wheel 13 and the steering wheel 36 respectively, so as to realize the safe and reliable full-wheel driving and parking brake function in the artificial control mode.

[0044] When the control system (controller / control center) issues a driving brake instruction in the automatic control mode, the first electromagnetic brake 11 brakes the two driving wheels 13 through the driving axle assembly 14 (indirectly brakes the driving wheel 13 through the internal gear pair of the driving axle assembly 14, and the two second electromagnetic brakes 35 of the steering axle assembly 30 brake the two steering wheels 36 respectively. When parking, the first electromagnetic brake 11 and the second electromagnetic brake 35 of the steering wheel 36 brake the driving wheel 13 and the steering wheel 36 respectively under the instruction of the control system, so as to realize the automatic mode full-wheel braking and parking function of the whole vehicle. The whole brake system is intelligent, safe and reliable.

[0045] In summary, the application sets the first electromagnetic brake 11 on the driving motor, and sets the second electromagnetic brake 35 on the steering wheel 36, so that whether in the artificial driving mode or the automatic control mode, the four-wheel stable full-wheel braking of the forklift can be realized, and the safety of the forklift driving and parking process is increased. At the same time, by installing an encoder in the motor, the accuracy and reliability of the vehicle operation are improved. The application can be compatible with artificial driving and automatic control modes, expand the use of the forklift, and realize one machine with two purposes. By externally installing a navigation sensor, the forklift can be modified into an AGV forklift, and then widely applied to various intelligent warehousing, transportation, stacking and other scenes, so as to replace manual work, reduce cost and increase efficiency.

[0046] The application can realize normal control of the forklift (including driving, braking and goods handling and stacking, etc.) in either manual driving mode or automatic control mode, thereby realizing one machine for two purposes without affecting each other. The driving motor 12 and the steering motor 31 are both provided with precise encoders, and compared with the traditional forklift, the control precision is higher, safer and more flexible, and the application range is more extensive. Further, during braking, the driving motor 12 can be controlled by the control system to recycle energy, realize regenerative energy braking, reduce energy consumption and prolong the endurance time of the forklift battery. Specifically, before the driving electromagnetic brake and the second electromagnetic brake 35 of the steering wheel 36 are controlled to brake by the control system, the control system controls the driving motor 12 to apply a reverse torque to reduce the speed, recycles the generated current to realize energy recycling, thereby reducing energy loss.

[0047] The above describes one embodiment of the application in detail, but the content is only a preferred embodiment of the application, and cannot be considered as limiting the scope of the application. Any equivalent changes and improvements made within the scope of the application should still belong to the scope of the claims of the application.

Claims

1. An all-wheel brake system, characterized by, Comprising: a controller; a running foot pedal brake assembly (20) connected with the controller; a drive axle assembly (10) comprising a drive axle assembly (14), drive wheels (13) rotatably arranged at both ends of the drive axle assembly (14), a drive motor (12) fixedly arranged on the drive axle assembly (14), and a first electromagnetic brake (11) arranged on the drive motor (12) and connected with the controller; a steering axle assembly (30) comprising a steering axle assembly (32), a steering wheel (36), and a steering motor (31) fixedly arranged on the steering axle assembly (32) for driving the steering wheel (36) to steer, and a second electromagnetic brake (35) arranged on the steering wheel (36) and connected with the controller.

2. A system according to claim 1, wherein, The first electromagnetic brake (11) is arranged at the tail end of the drive motor (12).

3. A system according to claim 2, wherein, The steering wheel (36) is rotatably connected with a steering support (34), and a driving gear (37) of the steering motor (31) is drivingly connected with the steering support (34).

4. A system according to claim 3, wherein, A stator of the second electromagnetic brake (35) is fixedly arranged on the steering support (34), and a rotor is arranged on a hub of the steering wheel (36).

5. A system according to claim 4, wherein, A rotary support (33) is arranged between the steering support (34) and the steering axle assembly (32).

6. A system according to claim 5, wherein, An encoder is arranged in the drive motor (12).

7. A full brake system according to claim 6, characterized in that An encoder is arranged in the steering motor (31).

8. A full brake system according to claim 7, characterized in that The running foot pedal brake assembly (20) comprises a brake pedal and an analog switch.

9. A counterbalanced fork truck characterized by, The full-wheel brake system according to any one of claims 1-8.

10. The counterbalanced fork truck of claim 9, wherein, Before the controller controls the drive electromagnetic brake and the second electromagnetic brake (35) of the steering wheel (36) to brake, the controller controls the drive motor (12) to apply a reverse torque to reduce the speed.

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