Accelerating and braking three-pedal device of electric forklift
By designing an electric forklift acceleration and braking three-pedal device integrating a dual accelerator pedal system and a driving braking system, the problem of large space occupancy of electric counterweight forklifts when adapting to dual accelerator pedals is solved, and the structure is compact and convenient to maintain, and it is highly universal.
Patent Information
- Application Number
- CN202421734146.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-22
AI Technical Summary
When adapting to the dual accelerator pedal, the electric counterweight forklift needs to be adapted to the driving brake system, which leads to a large space occupancy and inconvenient maintenance.
A three-pedal device for acceleration and braking of electric forklifts is designed. By integrating a dual accelerator pedal system and a driving brake system, it adopts pedal bracket, multi-link linkage mechanism and driving brake bracket, so that the space is compact and the maintenance is convenient.
It effectively solves the problem of large space occupation, realizes the simple and compact structure, is easy to disassemble and install and maintain, and is suitable for different models, with strong universality.
Smart Images
Figure CN222921388U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric forklifts, in particular to an acceleration and braking three-pedal device for electric forklifts. Background Art
[0002] The operation of an electric counterbalanced forklift is to determine the forward and reverse states by manually turning the direction switch, and determine the operating speed according to the speed signal given by the accelerator. Now there are a small number of forklifts equipped with dual accelerator pedals on the market, that is, the hand-turned direction switch is cancelled, and two accelerator pedals are used to control the forward and reverse operation of the vehicle respectively. The two accelerator pedals are linked, arranged on the left and right, and controlled by the left and right feet respectively. For example, when the forward accelerator pedal is stepped on, the reverse accelerator pedal on the other side is driven to lift by the linkage mechanism. When the forward pedal is released, the reverse pedal is also reset, and vice versa. The linkage mechanism of the dual accelerator pedal is mostly a spatial linkage mechanism, which generally brings the problem of large overall space occupation. It should be noted that in addition to the accelerator pedal, the operation of the electric forklift also requires the service brake system to control the operating state of the vehicle when necessary. For electric counterbalanced forklifts, the accelerator pedal and the brake pedal are generally located near the driver's feet, which causes the space where the dual accelerator pedal and the service brake pedal system are located to be close or even partially overlapped. Therefore, when an electric counterbalanced forklift is equipped with a dual accelerator pedal, it is generally necessary to consider adapting it to the service brake system, or to integrate the two into an integrated design. Utility Model Content
[0003] The utility model aims to solve at least one of the technical problems in the related art to a certain extent. To this end, one purpose of the utility model is to provide an electric forklift acceleration and braking three-pedal device, which effectively integrates forward and reverse dual acceleration pedals and a service brake system, has a simple and compact structure, and is easy to disassemble and maintain.
[0004] The three-pedal acceleration and braking device for electric forklifts proposed by the utility model includes a double acceleration pedal system and a service brake system;
[0005] The dual accelerator pedal system comprises a pedal bracket, a right electric accelerator pedal and a left electric accelerator pedal are respectively fixed at two ends of the top of the pedal bracket, sensors are arranged inside the right electric accelerator pedal and the left electric accelerator pedal, a multi-link linkage mechanism is connected between the right electric accelerator pedal and the left electric accelerator pedal, and the multi-link linkage mechanism is movably mounted on the lower surface of the pedal bracket;
[0006] The service brake system includes a service brake bracket fixedly connected to the pedal bracket, the top of the service brake bracket is connected to a brake pedal via a rotating pair, a return tension spring is installed between the brake pedal and the service brake bracket, a brake master cylinder is fixed to the top of the service brake bracket, and the brake master cylinder is connected to the brake pedal via a pin shaft.
[0007] Preferably, the right electric accelerator pedal includes a base plate fixed to the top of the pedal bracket. One end of the base plate is rotatably connected to a pedal, and the bottom of the pedal is rotatably connected to a swing arm. A return torsion spring is installed inside the swing arm, a sensor is fixed to the bottom of the pedal, and a linkage plate is fixed to the bottom of the pedal.
[0008] Preferably, the multi-link linkage mechanism includes a rocker rotatably connected to the pedal bracket. The two ends of the rocker are respectively movably connected to a left ball-joint link and a right ball-joint link. The other end of the right ball-joint link is movably connected to the linkage plate, and the other end of the left ball-joint link is movably connected to the left electric accelerator pedal.
[0009] Preferably, the structures of the right electric accelerator pedal and the left electric accelerator pedal are exactly the same.
[0010] The beneficial effects of the present utility model are as follows: It effectively integrates the forward and reverse double accelerator pedals and the service brake system, with a simple and compact structure, which is convenient for disassembly, installation and maintenance. The device can be directly applied to different vehicle models or can be adapted to different vehicle models with a slight modification of the mounting bracket, and has strong universality. Description of the Drawings
[0011] Figure 1 It is a three-dimensional structure schematic diagram of the electric forklift acceleration and braking three-pedal device proposed by the present utility model.
[0012] Figure 2 It is a schematic diagram of the double accelerator pedal system structure of the electric forklift acceleration and braking three-pedal device proposed by the present utility model.
[0013] Figure 3 It is a schematic diagram of the electric accelerator pedal structure of the electric forklift acceleration and braking three-pedal device proposed by the present utility model.
[0014] Figure 4 It is a schematic diagram of the linkage mechanism structure of the electric forklift acceleration and braking three-pedal device proposed by the present utility model.
[0015] Figure 5 It is a schematic diagram of the service brake system structure of the electric forklift acceleration and braking three-pedal device proposed by the present utility model.
[0016] In the figure: 1. Dual-accelerator pedal system; 11. Pedal bracket; 12. Right-side electric accelerator pedal; 121. Substrate; 122. Pedal; 123. Swing arm; 124. Return torsion spring; 125. Sensor; 126. Linkage plate; 13. Left-side electric accelerator pedal; 14. Multi-link linkage mechanism; 141. Rocker; 142. Left-side ball-joint connecting rod; 143. Right-side ball-joint connecting rod; 2. Service brake system; 21. Service brake bracket; 22. Brake pedal; 23. Return tension spring; 24. Master brake cylinder. Detailed implementation mode
[0017] Refer to Figures 1-5 As shown in the figure, the three-pedal device for accelerating and braking an electric forklift includes a dual-accelerator pedal system 1. A service brake system 2 is fixed to the bottom of the dual-accelerator pedal system 1. The dual-accelerator pedal system 1 includes a pedal bracket 11. At both ends of the top of the pedal bracket 11, a right-side electric accelerator pedal 12 and a left-side electric accelerator pedal 13 are respectively fixed. The right-side electric accelerator pedal 12 and the left-side electric accelerator pedal 13 have the same structure. A multi-link linkage mechanism 14 is movably connected to the bottom of the pedal bracket 11. The right-side electric accelerator pedal 12 includes a substrate 121 fixed to the top of the pedal bracket 11. One end of the substrate 121 is connected to a pedal 122 by a rotating pair. By stepping on the pedal 122, the pedal 122 rotates around its rotating shaft. The bottom of the pedal 122 is connected to a swing arm 123 by a rotating pair. The swing arm 123 rotates around its rotating shaft. A return torsion spring 124 is installed inside the swing arm 123. The pedal 122 can be restored to its initial position by the return torsion spring 124. A sensor 125 is fixed to the bottom of the pedal 122. The rotation angles of the swing arm 123 and the pedal 122 can be detected by the sensor 125, and then an analog signal is transmitted to the vehicle controller to determine the traveling direction and speed of the vehicle. A linkage plate 126 is fixed to the bottom of the pedal 122. When the pedal 122 rotates around its rotating shaft, the linkage plate 126 is driven to move. The multi-link linkage mechanism 14 includes a rocker 141 movably connected to the pedal bracket 11 by a rotating pair. Both ends of the rocker 141 are respectively movably connected to a left-side ball-joint connecting rod 142 and a right-side ball-joint connecting rod 143. The other end of the right-side ball-joint connecting rod 143 is movably connected to the linkage plate 126. The left-side ball-joint connecting rod 142 is movably connected to the left-side electric accelerator pedal 13. A connection relationship exists between the right-side electric accelerator pedal 12 and the left-side electric accelerator pedal 13 through the rocker 141, the left-side ball-joint connecting rod 142, and the right-side ball-joint connecting rod 143. The rotation of the right-side electric accelerator pedal 12 will drive the left-side electric accelerator pedal 13 to rotate.
[0018] Refer to Figure 5, the service brake system 2 includes a service brake bracket 21 fixedly connected to the pedal bracket 11. The service brake bracket 21 is fixed inside the forklift. The top of the service brake bracket 21 is connected with a brake pedal 22 by a rotating pair. When the service brake bracket 21 is stepped on, the service brake bracket 21 rotates around the rotating pair. A return spring 23 is installed between the brake pedal 22 and the service brake bracket 21. When the force applied to the service brake bracket 21 is removed, the brake pedal 22 is reset under the action of the return spring 23. The top of the service brake bracket 21 is fixed with a master brake cylinder 24, and the master brake cylinder 24 is connected to the brake pedal 22 by a pin shaft. The brake pedal 22 drives the master brake cylinder 24 to push the brake fluid to each wheel brake cylinder to brake the vehicle.
[0019] When this device is in use, the service brake bracket 21 is installed at a suitable position on the forklift. When the forklift needs to be accelerated, by stepping on the pedal 122, the pedal 122 rotates around its rotating shaft. While the pedal 122 rotates, the swing arm 123 moves and at the same time squeezes the swing arm 123 and the base plate 121 to make it rotate around the rotating shaft. When the pedal 122 rotates to a set angle, the sensor 125 outputs an analog signal to the vehicle controller to determine the traveling direction and speed of the vehicle. On the other hand, the movement of the right electric acceleration pedal 12 drives the pedal of the left electric acceleration pedal 13 to rotate around its rotating shaft through the multi-link linkage mechanism 14, causing the pedal of the left electric acceleration pedal 13 to lift upward. When the right electric acceleration pedal 12 is released, the return torsion spring 124 drives the pedal 122 to return to the initial position. Correspondingly, when the left electric acceleration pedal 13 is stepped on, the mechanism acts in a similar process, and the sensor 125 drives the vehicle to move in the reverse direction. When both the right electric acceleration pedal 12 and the left electric acceleration pedal 13 are stepped on simultaneously, restricted by the multi-link linkage mechanism 14, the sensors of the right electric acceleration pedal 12 and the left electric acceleration pedal 13 will not be triggered simultaneously. When braking the forklift, by stepping on the brake pedal 22, the brake pedal 22 rotates around the rotating pair, and at the same time drives the master brake cylinder 24 through the brake pedal 22 to brake the vehicle. When the force applied to the brake pedal 22 is removed, the brake pedal 22 is reset under the action of the return spring 23, and the vehicle is released from braking.
Claims
1. Three-pedal device for accelerating and braking electric forklift, characterized by: Includes dual accelerator pedal system and service brake system; The dual accelerator pedal system comprises a pedal bracket, a right electric accelerator pedal and a left electric accelerator pedal are respectively fixed at two ends of the top of the pedal bracket, sensors are arranged inside the right electric accelerator pedal and the left electric accelerator pedal, a multi-link linkage mechanism is connected between the right electric accelerator pedal and the left electric accelerator pedal, and the multi-link linkage mechanism is movably mounted on the lower surface of the pedal bracket; The service brake system includes a service brake bracket fixedly connected to the pedal bracket, the top of the service brake bracket is connected to a brake pedal via a rotating pair, a return tension spring is installed between the brake pedal and the service brake bracket, a brake master cylinder is fixed to the top of the service brake bracket, and the brake master cylinder is connected to the brake pedal via a pin shaft.
2. The three-pedal device for accelerating and braking an electric forklift according to claim 1, characterized in that: The right electric accelerator pedal includes a base plate fixed to the top of the pedal bracket, one end of the base plate is connected to the pedal by a rotating pair, the bottom of the pedal is connected to a swing arm by a rotating pair, a return torsion spring is installed inside the swing arm, a sensor is fixed to the bottom of the pedal, and a linkage plate is fixed to the bottom of the pedal.
3. The three-pedal device for accelerating and braking an electric forklift according to claim 2, characterized in that: The multi-link linkage mechanism includes a rocker connected to the pedal bracket by a rotating pair, the two ends of the rocker are respectively movably connected to the left ball joint connecting rod and the right ball joint connecting rod, the other end of the right ball joint connecting rod is movably connected to the linkage plate, and the other end of the left ball joint connecting rod is movably connected to the left electric accelerator pedal.
4. The three-pedal device for accelerating and braking an electric forklift according to claim 1, characterized in that: The structures of the right electric accelerator pedal and the left electric accelerator pedal are completely the same.