A forward-reverse pedal control mechanism

Abstract

The utility model relates to agricultural machinery technical field, more particularly to a kind of advancing and retreating pedal control mechanism.Advancing and retreating pedal control mechanism includes rotating seat, rotating shaft and two sets of pedal assembly;Two groups of pedal assembly are independently rotated on rotating seat by rotating shaft respectively;Two sets of pedal assembly are connected advancing pull rod and retreating pull rod respectively;Pedal assembly includes foot pedal, pedal rocker arm and connecting rod;Foot pedal is in the first end of pedal rocker arm;The second end of pedal rocker arm is inserted into rotating seat interior;The first end of connecting rod is inserted into the interior of rotating seat, and is connected with the second end of pedal rocker arm;The second end of connecting rod is connected advancing pull rod or retreating pull rod.The utility model reduces assembly difficulty and component quantity, reduces the possibility of assembly error accumulation, while operator can easily control two foot pedals with two feet respectively, reduces operation difficulty, improves the comfort of operation.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and more specifically, to a forward and reverse pedal control mechanism. Background Technology

[0002] Currently, the forward and reverse control mechanisms of mechanical hydraulic continuously variable transmissions (HSTs), commonly used in agricultural machinery, are often quite complex. They typically employ multi-stage linkages, rocker arms, and spring systems to connect the pedals to the hydraulic pump swashplate for speed and direction control. However, this complex mechanical connection method presents numerous problems.

[0003] On the one hand, due to the large number of components, the assembly process is cumbersome and difficult, which can easily lead to the accumulation of assembly errors, affecting the precision of the entire control mechanism and consequently the accuracy of the hydraulic continuously variable transmission (CVT). On the other hand, unavoidable gaps and deformations exist in the mechanical transmission chains such as multi-stage linkages and rocker arms, making it impossible to achieve precise linear speed regulation. Especially in delicate operation scenarios, speed fluctuations are prone to occur, affecting the quality and efficiency of agricultural machinery operations. Utility Model Content

[0004] The purpose of this utility model is to provide a forward and backward pedal control mechanism that can solve the above-mentioned technical problems.

[0005] This utility model provides a forward and backward pedal control mechanism, including a rotating base, a rotating shaft and two sets of pedal assemblies;

[0006] The two sets of pedal assemblies are independently rotatably mounted on the rotating base via the rotating shaft;

[0007] The two sets of pedal assemblies are used to connect the forward lever and the reverse lever, respectively;

[0008] The pedal assembly includes a foot pedal, a pedal rocker arm, and a connecting rod;

[0009] The foot pedal is located at the first end of the pedal rocker arm;

[0010] The second end of the pedal rocker arm is inserted into the rotating seat;

[0011] The first end of the connecting rod is inserted into the interior of the rotating seat and connected to the second end of the pedal rocker arm;

[0012] The second end of the connecting rod is used to connect to the forward pull rod or the backward pull rod.

[0013] In an optional embodiment, the pedal assembly further includes a rotating cylinder;

[0014] The rotating cylinder is sleeved on the rotating shaft, and the pedal rocker arm and the connecting rod are both fixedly connected to the rotating cylinder.

[0015] In an optional embodiment, a reset device is connected to the rotating cylinder for resetting the pedal rocker arm after it has been pressed.

[0016] In an optional embodiment, the pedal assembly further includes a transmission rod;

[0017] The first end of the transmission rod is connected to the rotating shaft, and the second end of the transmission rod is rotatably connected to the connecting rod.

[0018] In an optional embodiment, the transmission rod is disposed inside the rotating seat.

[0019] In an optional embodiment, the second end of the connecting rod is provided with a steering structure;

[0020] The steering structure is connected to the forward tie rod or the reverse tie rod.

[0021] In an optional embodiment, the steering structure includes a steering shaft and a steering seat;

[0022] The steering shaft is mounted on the steering seat, the second end of the connecting rod is connected to the steering shaft, and the rotating shaft is provided with a first connecting lug for connecting the forward pull rod or the reverse pull rod.

[0023] The first connecting lug is located below the steering shaft.

[0024] In an optional embodiment, the steering structure further includes a steering cylinder;

[0025] The steering cylinder is sleeved on the steering shaft, the second end of the connecting rod is connected to the steering cylinder, and the first connecting lug is fixedly installed on the steering cylinder.

[0026] In an optional embodiment, the steering structure further includes a second connecting lug;

[0027] One end of the second connecting ear is fixedly connected to the steering cylinder, and the other end is rotatably connected to the connecting rod;

[0028] The angle between the projections of the second connecting ear and the first connecting ear onto the plane perpendicular to the steering axis is 75°-105°.

[0029] In an optional embodiment, the connecting rod is a telescopic rod with adjustable length.

[0030] The beneficial effects of this utility model embodiment are:

[0031] By using two independent pedal assemblies, which connect the forward and reverse linkages respectively, the traditional complex multi-stage linkage, rocker arm and spring system is eliminated, reducing assembly difficulty and the number of parts, reducing the possibility of assembly error accumulation. At the same time, the operator can easily control the two foot pedals with both feet respectively, reducing the difficulty of operation and improving the comfort of operation. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A front view of the forward and reverse pedal control mechanism provided in an embodiment of this utility model;

[0034] Figure 2 for Figure 1 AA section view;

[0035] Figure 3 for Figure 1 BB cross-sectional view;

[0036] Figure 4 A side view of the forward and reverse pedal control mechanism provided in an embodiment of this utility model;

[0037] Figure 5 A three-dimensional structural schematic diagram of the forward and reverse pedal control mechanism provided in an embodiment of this utility model;

[0038] Figure 6 for Figure 5 Enlarged view of a section at point C;

[0039] Figure 7 An exploded view of the forward and reverse pedal control mechanism provided in an embodiment of this utility model;

[0040] Figure 8 for Figure 7 Enlarged view of a section at point D.

[0041] Icons: 1-Rotating seat; 2-Rotating cylinder; 3-Pedal rocker arm; 4-Foot pedal; 5-Connecting rod; 6-Adjustable limit rod; 7-Torsion spring; 8-Rotating shaft; 9-Bearing; 10-Steering shaft; 11-Steering cylinder; 12-First connecting ear; 13-Second connecting ear; 14-Limiting protrusion; 15-Stop block; 16-Transmission rod. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0047] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] The following is combined Figures 1-8 The following describes some embodiments of the present invention in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0049] This utility model provides a forward and reverse pedal control mechanism, including a rotating base 1, a rotating shaft 8, and two sets of pedal assemblies; the two sets of pedal assemblies are independently rotatably mounted on the rotating base 1 via the rotating shaft 8; the two sets of pedal assemblies are respectively used to connect a forward lever and a reverse lever; each pedal assembly includes a foot pedal 4, a pedal rocker arm 3, and a connecting rod 5; the foot pedal 4 is disposed at the first end of the pedal rocker arm 3; the second end of the pedal rocker arm 3 is inserted into the rotating base 1; the first end of the connecting rod 5 is inserted into the rotating base 1 and connected to the second end of the pedal rocker arm 3; the second end of the connecting rod 5 is used to connect the forward lever or the reverse lever.

[0050] In this embodiment, the two pedal assemblies are respectively connected to the forward linkage and the reverse linkage below, and the vehicle can move forward or backward by stepping on different foot pedals 4.

[0051] Specifically, in this embodiment, the rotating seat 1 is a semi-box structure, that is, it is sealed on all four sides, with an opening on the side through which the pedal rocker arm 3 and the connecting rod 5 pass. This arrangement can reduce external interference and protect the internal structure of the rotating seat 1.

[0052] In this embodiment, the pedal rocker arm 3 and the foot pedal 4 are fixedly connected. The connection method can be welding, integral setting or bolt fixing, but it is not limited to these fixed connection methods. It can also be other fixed connection methods, such as riveting, etc. The main purpose is to achieve the fixed connection between the foot pedal 4 and the pedal rocker arm 3.

[0053] In use, the two pedal assemblies are connected to the forward linkage and the reverse linkage respectively. When forward movement is required, the user steps on the foot pedal 4 on the pedal assembly connected to the forward linkage. The pedal rocker arm 3 rotates around the rotating shaft 8, which drives the connecting rod 5 to rotate around the rotating shaft 8, thereby moving the forward linkage and realizing the forward movement of the vehicle. Conversely, when the other foot pedal 4 is stepped on, the reverse linkage is moved, realizing the reverse movement of the vehicle.

[0054] In an optional embodiment, the pedal assembly further includes a rotating cylinder 2; the rotating cylinder 2 is sleeved on the rotating shaft 8, and the pedal rocker arm 3 and the connecting rod 5 are both fixedly connected to the rotating cylinder 2.

[0055] In this embodiment, two independent rotating cylinders 2 are sleeved on the rotating shaft 8. Each rotating cylinder 2 is connected to a pedal rocker arm 3 and a connecting rod 5. The pedal rocker arm 3 and the connecting rod 5 are integrated by the rotating cylinder 2 and can rotate together around the rotating shaft 8. When the foot pedal 4 is stepped on, the pedal rocker arm 3, the rotating cylinder 2, and the connecting rod 5 are moved, which in turn moves the forward or backward lever.

[0056] Specifically, in this embodiment, the connecting rod 5 and the pedal rocker arm 3 are respectively disposed at opposite ends of the rotating cylinder 2.

[0057] This configuration allows for more efficient and balanced force transmission. After the pedal rocker arm 3 is subjected to force, the force can be evenly and effectively transmitted to the connecting rod 5 through the connection at both ends of the rotating cylinder 2, avoiding localized force concentration, reducing the risk of component deformation, and enhancing the stability and reliability of the operating mechanism. The motion conversion is precise and flexible. As an intermediate transmission component, the rotating cylinder 2 enables the swing of the pedal rocker arm 3 to be accurately converted into the linear motion or swing of the connecting rod 5. Furthermore, the symmetry and stability of the connection at both ends improve the accuracy and consistency of motion conversion, making the control of the mechanical hydraulic continuously variable transmission more precise. The layout is compact and reasonable, which is conducive to optimizing the overall structural design, facilitating the installation and debugging of components, while reducing the space occupation and improving the space utilization efficiency of the operating mechanism.

[0058] In this embodiment, the rotating cylinder 2 is provided with a reset structure, which can reset the foot pedal 4 when the foot leaves the foot pedal 4 after the foot is stepped on.

[0059] Specifically, in this embodiment, the reset structure includes a torsion spring 7 and a stop block 15. The stop block 15 is fixed on the outer wall of the rotating cylinder 2, and the torsion spring 7 is sleeved on the outside of the rotating cylinder 2. One of its extended ends abuts against the stop block 15, and the other extended end abuts against the rotating seat 1. When the foot pedal 4 is pressed down and the rotating cylinder 2 rotates counterclockwise, the torsion spring 7 will apply a clockwise rotational force to the rotating cylinder 2. When the user releases the foot pedal 4, it can drive the rotating cylinder 2, the pedal rocker arm 3, and the foot pedal 4 to reset.

[0060] In this embodiment, a limit structure is also provided between the pedal assembly and the rotating seat 1 to limit the working stroke of the reset structure.

[0061] Specifically, in this embodiment, the limiting structure includes a limiting protrusion 14 and an adjustable limiting rod 6. The limiting protrusion 14 is fixed on the pedal rocker arm 3, and the adjustable limiting rod 6 is fixed on the rotating seat 1. When the pedal rocker arm 3 is in the highest position, the limiting protrusion 14 can abut against the adjustable limiting rod 6, thereby limiting the pedal rocker arm 3 from continuing to rotate upward through the adjustable limiting rod 6.

[0062] More specifically, in this embodiment, the adjustable limit rod 6 is a threaded rod, which can adjust its length in the direction of the limit protrusion 14, thereby adjusting the upper limit of the rotation of the pedal rocker arm 3.

[0063] In an optional embodiment, the rotating cylinder 2 is connected to the rotating shaft 8 via a gasket or bearing 9.

[0064] In this embodiment, the use of shims can reduce wear between the rotating cylinder 2 and the rotating shaft 8, thereby extending their service life.

[0065] In this embodiment, the rotating cylinder 2 can also be connected to the rotating shaft 8 via the bearing 9, which can effectively reduce the wear between the rotating shaft 8 and the rotating cylinder 2 and improve the service life of the rotating shaft 8 and the rotating cylinder 2.

[0066] Specifically, in this embodiment, the inner ring of the bearing 9 is fixed on the rotating shaft 8, and the outer ring is fixedly connected to the inner wall of the rotating cylinder 2.

[0067] More specifically, in this embodiment, there are two bearings 9, located at both ends of the rotating cylinder 2. This arrangement ensures the balance of the rotating cylinder 2 on the rotating shaft 8.

[0068] In an optional embodiment, the pedal assembly further includes a transmission rod 16; a first end of the transmission rod 16 is connected to the rotating shaft 8, and a second end of the transmission rod 16 is rotatably connected to the connecting rod 5.

[0069] In this embodiment, the transmission rod 16 is configured such that the connecting rod 5 can be vertically positioned under the action of gravity. The pedal rocker arm 3 is connected to the rotating cylinder 2 and is positioned below the rotating cylinder 2 in its initial state. The connecting rod 5 is positioned above the rotating cylinder 2 in its initial state, and the two form an obtuse angle. Thus, when the foot pedal 4 is stepped on, the pedal rocker arm 3 is driven to rotate around the rotating shaft 8, which in turn drives the end of the transmission rod 16 away from the rotating cylinder 2 to rise, thereby driving the connecting rod 5 to rise as a whole, and driving the forward or backward linkage to perform corresponding actions.

[0070] In an optional embodiment, the transmission rod 16 is disposed inside the rotating seat 1.

[0071] In this embodiment, the transmission rod 16 is integrally disposed inside the rotating seat 1, making the overall structure more compact and enabling better force transmission, thus ensuring the normal transmission of the forward or backward pull rod.

[0072] In an optional embodiment, the second end of the connecting rod 5 is provided with a steering structure; the steering structure is connected to the forward pull rod or the backward pull rod.

[0073] In this embodiment, by setting the steering structure, the vertical force of the connecting rod 5 is transmitted to the forward or backward lever, and then the forward or backward lever exerts a horizontal force.

[0074] In an optional embodiment, the steering structure includes a steering shaft 10 and a steering seat; the steering shaft 10 is disposed on the steering seat, the second end of the connecting rod 5 is connected to the steering shaft 10, and the rotating shaft 8 is provided with a first connecting lug 12 for connecting the forward pull rod or the reverse pull rod; the first connecting lug 12 is disposed below the steering shaft 10.

[0075] In this embodiment, the forward and backward levers are used in a horizontal direction. When using the forward or backward levers normally, the vertical force of the connecting rod 5 needs to be changed to a horizontal force to move the forward or backward levers.

[0076] In this embodiment, the first end of the connecting rod 5 is the upper end, which is connected to the transmission rod 16, and the second end of the connecting rod 5 is the lower end, which is connected to the steering shaft 10. The forward pull rod or the backward pull rod is connected to the first connecting ear 12, which is connected to the steering shaft 10.

[0077] With this configuration, the connecting rod 5 can rotate relative to the steering seat around the steering shaft 10, causing the first connecting ear 12 to rotate around the steering shaft 10, thereby moving the forward or backward lever at the other end of the first connecting ear 12 to achieve the forward or backward movement of the vehicle.

[0078] In this embodiment, the first connecting ear 12 is located below the steering shaft 10. When the connecting rod 5 moves up and down, the first connecting ear 12 can swing horizontally, thereby driving the forward or backward lever to move horizontally.

[0079] In an optional embodiment, the steering structure further includes a steering cylinder 11; the steering cylinder 11 is sleeved on the steering shaft 10, the second end of the connecting rod 5 is connected to the steering cylinder 11, and the first connecting lug 12 is fixedly disposed on the steering cylinder 11.

[0080] In this embodiment, the second end of the connecting rod 5 is connected to the steering cylinder 11, and the first connecting ear 12 is fixedly connected to the steering cylinder 11. When the connecting rod 5 moves up and down, it can drive the steering cylinder 11 to rotate, thereby driving the first connecting ear 12 to swing in the front and back direction, so as to drive the forward or backward lever to move in the front and back direction.

[0081] In an optional embodiment, the steering structure further includes a second connecting ear 13; one end of the second connecting ear 13 is fixedly connected to the steering cylinder 11, and the other end is rotatably connected to the connecting rod 5; the angle between the projections of the second connecting ear 13 and the first connecting ear 12 onto the plane perpendicular to the steering shaft 10 is 75°-105°.

[0082] In this embodiment, in order to enable the steering cylinder 11 to rotate via the connecting rod 5, a second connecting lug 13 is also provided on the steering cylinder 11. The connecting rod 5 is rotatably connected to the second connecting lug 13, so that the steering cylinder 11 can rotate when the connecting rod 5 moves up and down.

[0083] At this point, the transmission rod 16, the connecting rod 5, and the second connecting lug 13 form a crankshaft rocker structure. That is, when the rotating cylinder 2 rotates, the crankshaft rocker structure causes the steering cylinder 11 to rotate. The speed ratio between the two is affected by the length ratio of the transmission rod 16 to the second connecting lug 13.

[0084] In an optional embodiment, the connecting rod 5 is a telescopic rod with adjustable length.

[0085] Specifically, in this embodiment, by setting the connecting rod 5 to be of adjustable length, the connecting rod 5 can be easily installed, and the sensitivity of forward or backward movement can also be adjusted.

[0086] In this embodiment, there are many ways to adjust the length of the connecting rod 5, such as sleeve adjustment or threaded adjustment, as long as the length of the connecting rod 5 can be adjusted.

[0087] The beneficial effects of this utility model embodiment are:

[0088] By using two independent pedal assemblies, which are connected to the forward and reverse linkages respectively, the traditional complex multi-stage linkage, rocker arm and spring system is eliminated, reducing the assembly difficulty and the number of parts, reducing the possibility of assembly error accumulation. At the same time, the operator can easily control the two foot pedals 4 with both feet respectively, reducing the operation difficulty and improving the operation comfort.

[0089] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A forward / reverse pedal operating mechanism for a mechanical hydraulic continuously variable transmission, characterized in that, Includes a rotating base, a rotating shaft, and two sets of pedal assemblies; The two sets of pedal assemblies are independently rotatably mounted on the rotating base via the rotating shaft; The two sets of pedal assemblies are used to connect the forward lever and the reverse lever, respectively; The pedal assembly includes a foot pedal, a pedal rocker arm, and a connecting rod; The foot pedal is located at the first end of the pedal rocker arm; The second end of the pedal rocker arm is inserted into the rotating seat; The first end of the connecting rod is inserted into the interior of the rotating seat and connected to the second end of the pedal rocker arm; The second end of the connecting rod is used to connect to the forward pull rod or the backward pull rod.

2. The forward and reverse pedal control mechanism according to claim 1, characterized in that, The pedal assembly also includes a rotating cylinder; The rotating cylinder is sleeved on the rotating shaft, and the pedal rocker arm and the connecting rod are both fixedly connected to the rotating cylinder.

3. The forward and reverse pedal control mechanism according to claim 2, characterized in that, The rotating cylinder is connected to a reset device for resetting the pedal rocker arm after it has been pressed.

4. The forward and reverse pedal control mechanism according to claim 1, characterized in that, The pedal assembly also includes a transmission rod; The first end of the transmission rod is connected to the rotating shaft, and the second end of the transmission rod is rotatably connected to the connecting rod.

5. The forward and reverse pedal control mechanism according to claim 4, characterized in that, The transmission rod is located inside the rotating seat.

6. The forward and reverse pedal control mechanism according to claim 1, characterized in that, The second end of the connecting rod is provided with a steering structure; The steering structure is connected to the forward tie rod or the reverse tie rod.

7. The forward and reverse pedal control mechanism according to claim 6, characterized in that, The steering structure includes a steering shaft and a steering seat; The steering shaft is mounted on the steering seat, the second end of the connecting rod is connected to the steering shaft, and the rotating shaft is provided with a first connecting lug for connecting the forward pull rod or the reverse pull rod. The first connecting lug is located below the steering shaft.

8. The forward and reverse pedal control mechanism according to claim 7, characterized in that, The steering structure also includes a steering cylinder; The steering cylinder is sleeved on the steering shaft, the second end of the connecting rod is connected to the steering cylinder, and the first connecting lug is fixedly installed on the steering cylinder.

9. The forward and reverse pedal control mechanism according to claim 8, characterized in that, The steering structure also includes a second connecting ear; One end of the second connecting ear is fixedly connected to the steering cylinder, and the other end is rotatably connected to the connecting rod; The angle between the projections of the second connecting ear and the first connecting ear onto the plane perpendicular to the steering axis is 75°-105°.

10. The forward and reverse pedal control mechanism according to claim 1, characterized in that, The connecting rod is an adjustable telescopic rod.

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