Pedal type clutch control mechanism of riding type mini-tiller

Abstract

The utility model discloses a pedal type clutch control mechanism of a riding type mini-tiller, which is mounted on one side of a gearbox body and comprises a clutch arm, a fixed plate and a pedal rotating plate with a pedal, and the fixed plate is fixedly mounted on one side of the mini-tiller; one end of the clutch arm is connected with a clutch shifting fork in the gearbox body, and the other end of the clutch arm is connected with the lower end of the pedal rotating plate through a control inhaul cable; a return spring is arranged at the end, connected with the pedal rotating plate, of the control inhaul cable, and the middle of the pedal rotating plate is rotationally connected with the fixing plate. After the pedal rotating plate rotates downwards under the action of external force, the lower end of the pedal rotating plate moves to the clutch combining station from the clutch separating station and then is positioned, the clutch arm is driven by the control inhaul cable to rotate, and clutch is achieved; after the external force is removed, the pedal rotating plate can rotate to the clutch separation station from the clutch combination station under the action of the return spring; the vertical distance between the upper end of the pedal rotating plate and the rotating connecting point of the pedal rotating plate and the fixing plate is larger than the vertical distance between the rotating connecting point and the lower end of the pedal rotating plate.

Description

Technical Field

[0001] This utility model relates to the field of clutch control for micro-tillers, specifically to a foot-operated clutch control mechanism for a ride-on micro-tiller. Background Technology

[0002] Currently, the mainstream mini-tillers on the market are mainly walk-behind mini-tillers. These walk-behind mini-tillers require a person to follow behind and push them to work, which is labor-intensive and inefficient. In order to reduce labor intensity and improve operating efficiency, some four-wheeled ride-on mini-tillers have gradually appeared on the market. The operator can sit in the driver's seat to drive or cultivate the land. There is a clutch control mechanism under the driver's seat to control the engagement and disengagement of the clutch.

[0003] Chinese Patent Application No. 202420825553X discloses a clutch control mechanism, including a first control unit and a second control unit. The first control unit includes a pedal rod rotatably mounted on a tiller, which can drive the clutch shift fork shaft to rotate. The second control unit is located at the rear of the tiller body and includes a traction cable. One end of the traction cable is connected to a handle assembly, and the other end is connected to the pedal rod. The traction cable can pull the pedal rod. When the operator is driving from the seat, pressing the pedal rod causes a first rotating plate to move downwards via a traction spring in the middle of the pedal rod. The first rotating plate drives the shift fork shaft and a second rotating plate to rotate. After the second rotating plate rotates, it stretches a return spring. When the pedal rod is no longer pressed down, the elasticity of the return spring causes the shift fork shaft to return to its original position. The traction spring then drives the pedal rod to return to its original position, thereby controlling the clutch engagement. The aforementioned pedal bar is connected to the first rotating plate via a traction spring. The traction spring is located in the middle of the pedal bar, away from the rotation position of the pedal bar. It requires a large force to drive the rotating plate to rotate, which is not labor-saving, and the overall installation structure is relatively complex. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide a foot-operated clutch control mechanism for a ride-on mini tiller, so as to solve the problem that the existing clutch control mechanism of the ride-on mini tiller has a complex structure and requires a lot of effort to operate.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A foot-operated clutch control mechanism for a ride-on mini-tiller is installed on one side of the gearbox housing. It includes a clutch arm, a fixed plate, and a foot pedal. The fixed plate is fixedly installed on one side of the mini-tiller. The clutch arm is horizontally oriented, with one end rotatably mounted on the gearbox housing and connected to a clutch fork inside the gearbox housing. The other end is connected to the lower end of the foot pedal via a control cable. A return spring is provided at the end of the control cable connected to the foot pedal. The foot pedal is positioned on one side of the fixed plate and rotatably connected to the fixed plate in the middle. After the upper end of the foot pedal rotates downward under external force, the lower end moves from the clutch disengagement position to the clutch engagement position and is then positioned. The clutch arm rotates under the control cable to achieve clutch engagement. The line connecting the upper and lower ends of the clutch cable is tangent to the rotation point of the foot pedal and the fixed plate. After the external force is removed, the foot pedal can return from the clutch engagement position to the clutch disengagement position under the action of the return spring on the control cable. The vertical distance between the upper end of the foot pedal and the rotation connection point between the foot pedal and the fixed plate is greater than the vertical distance between the rotation connection point and the lower end of the foot pedal. In this way, when in use, pressing down on the pedal causes the upper part of the foot pedal to rotate around the fixed plate under pressure. During rotation, the upper part moves downward and the lower part moves away from the fixed plate. Simultaneously, the control cable connected to the lower end of the foot pedal moves synchronously. During this movement, the return spring on the control cable deforms, returning from a stretched state to a compressed state, and pulls the clutch arm connected to it to rotate. After the clutch arm rotates, the clutch is engaged. The clutch control mechanism mainly consists of the foot pedal, the fixed plate, and the control cable. It has a simple and compact structure, making it easy to promote. Furthermore, the relative position of the lower end of the control cable to the rotation point between the foot pedal and the fixed plate changes as the foot pedal rotates. When in the clutch engaged state, it is nearly on the same straight line as this rotation point. During the downward pressing process, the angle between the control cable and the clutch arm gradually changes from an acute angle to an obtuse angle, gradually reducing the force required to pull the lever arm, making it easier to press down on the foot pedal. When the foot pedal is in the clutch disengagement position, there is a gap between the middle of the control cable and the rotatable connection between the foot pedal and the fixed plate. When the foot pedal is in the clutch engagement position, the upper end of the control cable, the rotatable connection between the foot pedal and the fixed plate, and the lower end of the control cable are on the same straight line. Furthermore, the foot pedal employs a lever-saving principle: the distance between the upper end of the foot pedal and the rotation point is greater than the vertical distance from the rotation point to the lower end of the foot pedal, meaning the effort arm is greater than the resistance arm. Compared to traditional foot pedals, this design is more labor-saving.

[0007] Furthermore, the foot pedal is positioned outside the fixed plate, and the control cable is positioned between the foot pedal and the fixed plate. This makes the foot pedal and control cable easy to install and maintain.

[0008] Furthermore, the foot pedal is L-shaped, with a pin connecting it to a fixed plate at its corner. This reduces the material usage of the foot pedal and creates a gap between it and the fixed plate, minimizing friction during rotation.

[0009] Furthermore, the control cable is rotatably connected to the clutch arm, and an internally threaded collar is rotatably mounted on the clutch arm. A screw with a threaded engagement with the internally threaded collar is located at the upper end of the control cable. A protruding post is fixedly mounted on the foot pedal, and the return spring on the control cable is detachably connected to the protruding post via a hook. In this way, the control cable is connected to the clutch arm via the internally threaded collar, and can rotate together with the internally threaded collar after the foot pedal rotates. During installation, the distance between the upper end of the control cable and the internally threaded collar is adjustable, allowing adjustment of the return spring's tension as needed. The protruding post on the foot pedal facilitates connection of the lower end of the control cable to it.

[0010] Furthermore, the internally threaded collar is rotatably mounted on the clutch arm via a rotating shaft, and a strip-shaped opening is provided on the side of the internally threaded collar; an adjusting nut that engages with the screw thread is also provided on the internally threaded collar. Thus, the strip-shaped opening on the internally threaded collar provides it with a certain tension, resulting in a longer service life. The adjusting nut fitted on the screw allows for adjustment of the screw's installation position during use, further enabling adjustment of the control cable.

[0011] Furthermore, a limiting stop is fixedly installed next to the protruding post and on the foot pedal plate. A long, narrow limiting opening or hole is provided at the lower end of the fixed plate, and the end of the limiting stop is inserted into the limiting opening or hole. A limiting protrusion is also provided on the clutch arm, on one side of the internal threaded collar. When the foot pedal plate rotates under external force, it can drive the limiting stop to move from one side of the limiting opening or hole to the other side, causing the screw at the upper end of the control cable to rotate in the same direction as the foot pedal plate until it moves to the other side of the limiting opening or hole, and the side end of the screw abuts against the limiting protrusion, thus positioning the foot pedal plate in the clutch engagement position. In this way, by providing a limiting opening or hole at the lower end of the fixed plate and a limiting stop on the foot pedal plate, the rotation stroke and angle of the foot pedal plate can be limited, facilitating precise control of the rotation angle and further achieving precise control of the clutch arm rotation angle. The limiting protrusion on the clutch arm can, together with the limiting port or limiting hole, form a two-point limiting of the foot pedal. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the installation structure of the foot pedal rotating plate in the foot-operated clutch control mechanism in the embodiment when it is not under stress.

[0013] Figure 2This is a schematic diagram of the installation structure of the foot pedal rotating plate in the foot-operated clutch control mechanism under stress in the embodiment.

[0014] Figure 3 This is a schematic diagram of the installation structure of the foot pedal and the fixed plate in the embodiment;

[0015] Figure 4 This is a partial schematic diagram of the installation structure of the foot-operated clutch control mechanism on the micro-tiller in the embodiment. Detailed Implementation

[0016] 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, not all, of the embodiments of this utility model. 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. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0017] It should be noted that similar reference numerals 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. 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 figures, or the orientation or positional relationship commonly used when the product 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. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. 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.

[0018] like Figures 1-4As shown, the foot-operated clutch control mechanism of the riding-type tiller provided in this embodiment is installed on one side of the gearbox housing (in front of the tiller seat), including a clutch arm 2, a fixing plate 1, and a foot pedal rotating plate 3 with a pedal. The fixing plate 1 is fixedly installed on one side of the tiller; the clutch arm 2 is arranged horizontally, one end is rotatably mounted on the gearbox housing and connected to the clutch fork inside the gearbox housing, and the other end is connected to the lower end of the foot pedal rotating plate 3 through a control cable 4; a return spring 43 is provided at the end where the control cable 4 connects to the foot pedal rotating plate 3, and the foot pedal rotating plate 3 is placed on one side of the fixing plate 1, and its middle part is rotatably connected to the fixing plate 1; After the upper end of the foot pedal 3 is rotated downward by an external force, the lower end moves from the clutch disengagement position to the clutch engagement position and is then positioned. The clutch arm 2 is rotated by the control cable 4 to achieve clutch engagement. The line connecting the upper and lower ends of the clutch cable is tangent to the rotation point of the foot pedal 3 and the fixed plate 1 (i.e., the upper and lower ends are close to the rotation point on a straight line). After the external force is removed, the foot pedal 3 can return from the clutch engagement position to the clutch disengagement position under the action of the return spring 43 on the control cable 4. The vertical distance between the upper end of the foot pedal 3 and the rotation connection point of the foot pedal 3 and the fixed plate 1 is greater than the vertical distance from the rotation connection point to the lower end of the foot pedal 3. In this way, when in use, pressing down on the pedal causes the upper end of the foot pedal 3 to rotate around the fixed plate 1 under pressure. During rotation, the upper end moves downward and the lower end moves away from the fixed plate 1. Simultaneously, the control cable 4 connected to the lower end of the foot pedal 3 moves synchronously. During this movement, the return spring 43 on the control cable 4 deforms, returning from a stretched state to a compressed state, and pulls the clutch arm 2 connected to it to rotate. After the clutch arm 2 rotates, the clutch is engaged or disengaged. The clutch control mechanism mainly consists of the foot pedal 3, the fixed plate 1, and the control cable 4. It has a simple and compact structure and is easy to promote. Simultaneously, the relative position of the lower end of the control cable 4 with the rotation point between the foot pedal 3 and the fixed plate 1 changes when the foot pedal 3 rotates. When in the clutch engagement state, it is nearly aligned with this rotation point. During the downward pressing process, the angle between the control cable 4 and the clutch arm 2 gradually changes from an acute angle to an obtuse angle, gradually reducing the force required to pull the power arm and making it easier to step on the foot pedal 3. That is, when the foot pedal 3 is in the clutch disengagement position, there is a gap between the middle of the control cable 4 and the rotational connection between the foot pedal 3 and the fixed plate 1. When the foot pedal 3 is in the clutch engagement position, the upper end of the control cable 4, the rotational connection between the foot pedal 3 and the fixed plate 1, and the lower end of the control cable 4 are all on the same straight line. In addition, the foot pedal 3 adopts the principle of effort-saving lever. The distance between the upper end of the foot pedal 3 and the rotation point is greater than the vertical distance from the rotation point to the lower end of the foot pedal 3. That is, the power arm is greater than the resistance arm. Compared with the traditional foot pedal, this setting method is also more effort-saving.

[0019] Specifically, in this embodiment, the foot pedal 3 is placed outside the fixed plate 1, and the control cable 4 is placed between the foot pedal 3 and the fixed plate 1. The foot pedal 3 is L-shaped, and its corner is rotatably connected to the fixed plate 1 by a pin 5. Specifically, a sleeve extending towards the fixed plate 1 is provided in the middle of the foot pedal 3, and a pin 5 is provided on the fixed plate 1. The pin 5 corresponds to the sleeve and is sleeved on the sleeve. After the end extends out of the sleeve, a stop is used to prevent the pin 5 from falling off the sleeve. The foot pedal 3 is initially inclined, with both the upper and lower ends close to the end where the clutch arm 2 connects to the gearbox housing. When the foot pedal 3 is rotated under force, the upper end rotates downward until it is at the same height as the rotating end and is in a horizontal state, then rotates to the clutch engagement position. In this embodiment, the right side of the fixed plate 1 is bent towards the side of the micro-tiller and welded to the frame.

[0020] Furthermore, the control cable 4 is rotatably connected to the clutch arm 2. An internally threaded collar 21 is rotatably mounted on the clutch arm 2. A screw 41, threadedly engaged with the internally threaded collar 21, is located at the upper end of the control cable 4. A protrusion 32 is fixedly mounted on the foot pedal 3. The return spring 43 on the control cable 4 is detachably connected to the protrusion 32 via a hook. Thus, the control cable 4 is connected to the clutch arm 2 via the internally threaded collar 21, and can rotate together with the internally threaded collar 21 after the foot pedal 3 rotates. When installing the control cable 4, the distance between its upper end and the internally threaded collar 21 is adjustable, allowing adjustment of the tension of the return spring 43 as needed. The protrusion 32 on the foot pedal 3 facilitates connection of the lower end of the control cable 4 to it.

[0021] Furthermore, the internally threaded collar 21 is rotatably mounted on the clutch arm 2 via a rotating shaft, and a strip-shaped opening is provided on the side of the internally threaded collar 21; an adjusting nut 42 that threadedly engages with the screw 41 is also provided on the internally threaded collar 21. Thus, the strip-shaped opening on the internally threaded collar 21 provides a certain tension, resulting in a longer service life. The adjusting nut 42 fitted on the screw 41 allows for adjustment of the screw 41's installation position during use, further enabling adjustment of the control cable 4.

[0022] Furthermore, a limiting stop bar 33 is fixedly installed next to the protruding post 32 and on the foot pedal rotating plate 3. A long strip-shaped limiting opening 11 is provided at the lower end of the fixed plate 1, and the end of the limiting stop bar 33 is inserted into the limiting opening 11. A limiting protrusion 22 is also provided on the clutch arm 2 and on one side of the internal threaded collar 21. When the foot pedal rotating plate 3 rotates under the action of external force, it can drive the limiting stop bar 33 to move from one side of the limiting opening 11 to the other side, and cause the screw 41 at the upper end of the control cable 4 to rotate with the rotation direction of the foot pedal rotating plate 3 until it moves to the other side of the limiting opening 11, and the side end of the screw 41 abuts against the limiting protrusion 22, so that the foot pedal rotating plate 3 is positioned and in the clutch engagement position. Thus, by setting a limiting port 11 at the lower end of the fixed plate 1 and setting a limiting stop bar 33 on the foot pedal 3, the rotation stroke and angle of the foot pedal 3 can be limited to a certain extent, so as to accurately control the rotation angle of the foot pedal 3, and further achieve the purpose of accurately controlling the rotation angle of the clutch arm 2. The limiting protrusion 22 set on the clutch arm 2 can form a two-point limiting of the foot pedal 3 together with the limiting port 11.

[0023] In this embodiment, the limiting port 11 is inverted U-shaped. In specific implementations, a strip hole or an arc hole can be used instead of the limiting port 11. Specifically, both the strip hole and the arc hole can provide space for the limiting protrusion 22 to move when the foot pedal 3 rotates, wherein the arc hole needs to be consistent with the moving path of the limiting protrusion 22.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A foot-operated clutch control mechanism of a ride-on mini-tiller, which is installed on one side of a gearbox case, comprising a clutch arm and a foot-operated rotating plate with a pedal, characterized in that, The micro tiller further comprises a fixed plate fixedly installed on one side of the micro tiller; the clutch arm is horizontally arranged, one end of which is rotatably installed on the gearbox body and connected with the clutch yoke in the gearbox body, and the other end is connected with the lower end of the pedal rotating plate through a control cable; the control cable is provided with a return spring at the connecting end of the control cable and the pedal rotating plate; the pedal rotating plate is arranged on one side of the fixed plate and rotatably connected with the fixed plate at the middle part; after the upper end of the pedal rotating plate is turned downward by external force and the lower end is moved from the clutch disengagement position to the clutch engagement position and positioned, the clutch arm is rotated by the control cable to realize clutching, and the lines connecting the upper and lower ends of the clutch cable are tangent to the rotating points of the pedal rotating plate and the fixed plate; after the external force is removed, the pedal rotating plate can be rotated from the clutch engagement position to the clutch disengagement position under the action of the return spring of the control cable; the vertical distance between the upper end of the pedal rotating plate and the rotating connection point of the pedal rotating plate and the fixed plate is greater than the vertical distance between the rotating connection point and the lower end of the pedal rotating plate.

2. The foot-operated clutch control mechanism of a ride-on mini-tiller according to claim 1, wherein The pedal rotating plate is arranged on the outer side of the fixed plate, and the control cable is arranged between the pedal rotating plate and the fixed plate.

3. The foot-operated clutch control mechanism of a ride-on mini-tiller according to claim 1 or 2, wherein The pedal rotating plate is L-shaped, and the corner of the pedal rotating plate is rotatably connected with the fixed plate through a pin shaft.

4. The foot-operated clutch control mechanism for a ride-on mini-tiller according to claim 3, wherein The control cable is rotatably connected with the clutch arm, an internally threaded sleeve ring is rotatably installed on the clutch arm, and a screw rod is arranged at the upper end of the control cable and threadedly matched with the internally threaded sleeve ring; a convex column is fixedly installed on the pedal rotating plate, and the return spring on the control cable is detachably connected with the convex column through a hook.

5. The foot-operated clutch control mechanism for a ride-on mini-tiller according to claim 4, wherein The internally threaded sleeve ring is rotatably installed on the clutch arm through a rotating shaft, and a strip-shaped opening is arranged on the side of the internally threaded sleeve ring; an adjusting nut threadedly matched with the screw rod is further arranged on the internally threaded sleeve ring.

6. The foot-operated clutch control mechanism of a ride-on mini-tiller according to claim 4 or 5, wherein A limiting stop lever is further fixedly installed on the pedal rotating plate beside the convex column, a limiting opening or limiting hole in the shape of a long strip is arranged at the lower end of the fixed plate, and the limiting stop lever is inserted into the limiting opening or limiting hole at the tail end; a limiting protrusion is further arranged on the side of the internally threaded sleeve ring on the clutch arm, when the pedal rotating plate is rotated under the action of external force, the limiting stop lever can be moved from one side of the limiting opening or limiting hole to the other side, and the screw rod at the upper end of the control cable is rotated in the rotating direction of the pedal rotating plate until the screw rod is moved to the other side of the limiting opening or limiting hole and abuts against the limiting protrusion, and the pedal rotating plate is positioned and located at the clutch engagement position.

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