JP3226923U - Lever device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lever device for hydraulically operating a brake or a clutch of a vehicle provided with a handlebar. A lever device (1) is provided with a connecting device to a handlebar of a vehicle, and slides in a pump main body (3) that defines a cavity (5) and the pump main body (3) in a thrust direction (XX). A pump assembly 2 comprising an operably associated piston 6. The lever device further comprises a control lever assembly 4 rotatably associated with the pump body for rotation about a pivot axis (Y-Y), the control lever assembly being directly or indirectly associated with the piston. It is connected. [Selection diagram] Figure 8

Description

The present invention relates to a lever device.

In particular, the invention relates to a lever device for actuating a brake or clutch of a vehicle with a handlebar.

In vehicles with handlebars, such as bicycles and motorcycles, the brake and/or clutch is a pump with a lever device attached to the handlebar connected to a pipe containing the working fluid associated with the brake or clutch to be actuated. Operated by. Such pumps typically include a control lever and a cylinder-piston assembly, the control lever being located along a handlebar grip with which the operator gripping the grip with the control lever and clasping his hand. Acts on the piston by pivoting around a portion of the handlebar itself to determine the rotation of the control lever about its pivot that approaches the free end of the control lever that is cantilevered against the grip of Thrust force is generated, the position of which determines the thrust on the working fluid for controlling the actuation of the brake or clutch.

Cylinder-piston assemblies typically include a return spring to resiliently bias the position of the piston back to its top dead center when the control lever is not being pushed by the driver, and thus to its rest position. Determine the return of the control lever of.

As is known, there are various types of handlebars that have different shapes and sizes depending on the size of the hand gripping the different handlebars by the driver. Therefore, in order to provide comfortable driving in the maximum ergonomic conditions for each driver, a lever device solution has been proposed, which may be towards or from the handlebar grip as required. The tilt of the control lever is adjustable with respect to the handlebar grip to move the cantilevered free end of the lever away. For example, WO-2005-049416 and WO-2007-026383, likewise by the Applicant, show a lever device of this kind, in which the control lever is a control lever allowing tilting of the control lever with respect to the handlebar grip. And a cantilever end of the lever. However, these solutions do not completely solve the problem, forcing the implementation to increase the number of movable joints, which leads to an increase in the structural complexity of the control lever and the possibility of malfunction of the lever device. Bring an increase.

Indeed, despite gripping the handlebar grip in a comfortable and ergonomic way, some drivers want to push the control lever without activating the brake or clutch. In other words, we do not want a quick brake or clutch response. Other drivers desire a quick reaction of the brake or clutch as soon as the lever is pressed. The distance traveled by the piston without actuating the brake or clutch is commonly referred to as the "stroke free play" of the piston. Correspondingly, the control lever actuating the piston also has the stroke-free play of the control lever.

Therefore, it is felt necessary to adjust the stroke-free play of the piston and thus the stroke-free play of the control lever.

Therefore, it is strongly felt that it is necessary for the driver to adjust the stroke-free play of the piston and thus the stroke-free play of the control lever that operates the piston, while ensuring an ergonomic and comfortable grip on the handlebar.

In particular, in the range of high performance vehicles with handlebars, there is a felt need to customize the amount of stroke free play of the piston and thus of the control lever that actuates the piston.

For example, US-2012-0124991 discloses a bicycle brake pump solution in which the piston of the pump is drilled transversely to the thrust direction to accommodate an adjusting cam used to adjust the stroke-free play of the piston. Is showing a plan.

However, such a solution is not without drawbacks as it necessitates the use of a large number of mutually assembled parts for a standard pump. At the same time, it also necessitates the inclusion of hydraulic seals where the cams are installed, in order to minimize leakage of the working fluid. Moreover, adjustment by a cam housed in such a hole extending transversely to the thrust axis near the thrust axis of the piston itself necessarily limits some of the dimensions of the opening of the hole into which the cam is inserted. Allows for adjustment of piston stroke. Therefore, such a variation is necessarily smaller than the lateral extent of the piston, and in particular the variation is approximately equal to the difference between the opening of the bore and the lateral dimension of the cam.

Furthermore, providing a hole in the body of the piston necessarily weakens the strength of the piston itself. Especially for high-performance vehicle applications, the piston must be manufactured in larger parts of equal strength, which means an increase in the size of the brake pump. The lateral dimension of the cam must also withstand the stresses that occur during the operating step, requiring the cam for a given lateral dimension. Furthermore, providing such a hole in the piston body makes the brake pump potentially susceptible to brake fluid leakage.

Therefore, it is strongly felt that it is necessary to adjust the stroke-free play of the piston and thus the stroke-free play of the control lever that actuates the piston, while ensuring an ergonomic and comfortable grip of the handlebar for the driver.

There is a strong felt need to adjust the stroke-free play of the control lever without increasing the structural complexity of the pump or reducing its reliability.

Further examples which may be at least partly related to a solution of the kind mentioned above are US-4840082, EP-08933337, US-4560049, EP-1972537, US-2013-220064, DE-1020100040045, US-2009-. 229927 and EP-1864903.

Document WO2014068518A1 by the same applicant shows a device for calibrating the free play of pistons, eg master cylinders. In particular, this solution provides a stroke-free play adjustment by the user. It is possible to calibrate stroke-free play only during manufacturing. Once the stroke-free play calibration is complete, the cylinder is shipped from the factory with a fixed value for stroke-free play, which is not user adjustable. In this pump, the user can only adjust the position of the lever (ergonomical function) and the lever center distance, ie the ratio of the lever movement to the floating movement of the pump (adjustment of adjustability of braking action).

Therefore, this known solution is a less perceived problem, i.e., for example, the driver applies the brakes or clutches frequently and sharply, usually gripping the control lever with a few fingers, the index and middle fingers, It does not solve the problem that the stroke play can be corrected by changing the angular position of the control lever at the same time for sporty driving where it is desired to bring the lever a little closer to the handlebar knob. This allows it to be pre-loaded and ready for actuation, but this does not apply any action to the piston and moves on to adjusting the stroke-free play, moving the lever to the position where the piston is suddenly actuated in the first movement. ..

In other words, the solution shown in WO2014068518A1 allows adjustment of stroke-free play, for example by lengthening it, but the stationary brake lever is in a very small stroke-free play position, Still touching prevents the piston from returning to adjustment ready for immediate actuation. In fact, to achieve this adjustment, the vehicle must be stopped and the stroke-free play recalibrated, but still the optimal ergonomics of the lever position is unchanged. Instead, this solution is very useful for calibrating the end position of the piston and changing the amount of free play in the factory or workshop, but for changing the adjustment of the device depending on the driving style Not useful for ongoing adjustments that may be on board.

Applicant's document WO2008056379A1 shows a solution for modifying or adjusting the action of the piston. In this solution, the distance between the operating point of the piston of the lever and the rotational axis of rotation of the lever itself is changed, which changes the lever ratio. This solution thus makes it possible to solve the problem of equal rotation of the control lever, depending on whether the braking action is changed, rather adjusted, or how much the piston is actuated, and the stroke play of the piston It has no effect on.

Therefore, there is a need to adjust piston stroke in a simple and reliable way.

Therefore, there is a felt need to adjust the stroke-free play of the piston and thus to control the piston in real time during its sudden stop without the need for subsequent recalibration of the brake or clutch.

There is a strong need to provide a pump solution that is compact and at the same time enables fine adjustment of the stroke-free play of the control lever without disassembling the pump or the control lever.

Especially when the driver wants to grasp the control lever without operating the piston, it is strongly felt that it is necessary to correct the free play of the piston and at the same time adjust the position of the control lever with respect to the handlebar or the handlebar grip knob. ing. It therefore rotates it slightly and features optimal grip ergonomics of the control lever in the new grip position.

Similarly, it is strongly felt that the position of the control lever and the stroke-free play of the piston must be adjusted in order to stop the control lever at the optimum grip position while adjusting the position of the control lever. Thus, the first touch of the control lever itself provides optimal ergonomics and quick piston response.

At the same time, the need to separate coordination is felt.

Ergonomics of the grip position of the control lever, possibly even while driving the vehicle.

Of the adjustment of the end position of the piston and thus of the free play of the piston itself without changing the ergonomics.

-Without changing the ergonomics of the lever ratio or the position of the end of the piston, in some cases even while the vehicle is running.

-Control lever position and piston stroke free play position. It does not change the ergonomics of the control lever itself grip position and lever ratio modulation.

This latter requirement is primarily intended to be solved here, allowing the transition from normal adjustment to very sporty adjustment (and other adjustments) during vehicle suspension. .. Here, while the vehicle is paused, the control lever is not or is being gripped, or is being pre-gripped or is being strongly pre-gripped (e.g. handlebars without actuating the piston). Optimal ergonomics (optimum ergonomics with lever not released or gripped or pre-grip) for optimal calibration and optimal end position of piston Maintained with a good lever ratio.

The object of the present invention is to overcome the drawbacks of the prior art and to provide a solution to the need described herein with reference to the prior art.

These and other objects are achieved by a lever device according to claim 1.

Some advantageous embodiments are the object of the dependent claims.

The proposed solution applies to all vehicles driven by handlebars, such as bicycles and motorcycles, racing motorcycles, three-wheeled motorcycles or scooters, four-wheelers or "quads", as well as racing cycles, mountain bikes and snowmobiles can do. The proposed solution can be applied to braking and clutch systems. According to the present application, modifications will be made which do not change the concept of the invention.

Further features and advantages of the lever device will become apparent from the description provided below of its preferred embodiments, given for purposes of illustration and not limitation, with reference to the accompanying drawings.

It is a top view of a lever device. It is the figure which followed the arrow II shown in FIG. It is an axonometric view of a lever device. It is an axonometric view of a lever device. FIG. 6 is an isometric view of a lever device with separated parts. It is an axonometric view of a part of lever apparatus provided with a stroke free play adjusting device according to an embodiment. FIG. 3 is an enlarged axonometric view of the stroke-free play adjusting device according to the embodiment. FIG. 6 is an axonometric view from the bottom of the lever device. FIG. 8 is a schematic cross-sectional view along the section plane identified by arrows VIII-VIII in FIG. 2. FIG. 9 is a schematic cross-sectional view showing the adjustment of stroke-free play when the control lever is in the rest position, the cross-section being along the section plane identified by the arrows VIII-VIII in FIG. 2 and FIG. It is an enlarged view of a free play adjusting device. FIG. 9 is a schematic cross-sectional view showing the adjustment of stroke-free play when the control lever is in the rest position, the cross-section being along the section plane identified by arrows VIII-VIII in FIG. 2 and FIG. 9-2. FIG. 3 is an enlarged view of a part of the bottom of the piston. FIG. 8 is a schematic cross-sectional view showing stroke-free play adjustment when the control lever is in the rest position, the cross-section being along the section plane identified by arrows VIII-VIII in FIG. 2 and FIG. It is an enlarged view of a play adjusting device. FIG. 10 is a schematic cross-sectional view showing stroke-free play adjustment when the control lever is in the rest position, the cross-section being along the section plane identified by arrows VIII-VIII in FIG. 2 and FIG. It is an enlarged view of a part of bottom part of a piston. FIG. 11 is a cross-sectional view showing stroke-free play adjustment when the control lever is in the rest position, the cross-section being along the section plane identified by the arrows VIII-VIII in FIG. 2 and FIG. It is an enlarged view of an adjustment device. FIG. 11 is a schematic cross-sectional view showing stroke-free play adjustment when the control lever is in the rest position, the cross-section being along the section plane identified by arrows VIII-VIII in FIG. 2 and FIG. It is an enlarged view of a part of bottom part of a piston. FIG. 3 is an enlarged axonometric view of the stroke-free play adjusting device according to the embodiment. FIG. 13 is an axonometric view taken along arrow XII in FIG. 12. FIG. 3 is an enlarged axonometric view of the stroke-free play adjusting device according to the embodiment. FIG. 14 is an axonometric view taken along the arrow XIII of FIG. 13. It is an axonometric view which shows embodiment of a stroke free play adjusting device.

According to a general embodiment, a lever device 1 for hydraulically actuating a brake or clutch of a vehicle with handlebars comprises a pump assembly 2. The pump assembly 2 comprises a pump body 3 with a connecting device 47 to the handlebar of the vehicle, the pump body 3 defining a cavity 5. The pump assembly 2 further comprises at least one piston 6 operatively associated with the pump body 3 so as to be adapted to slide within the cavity 5 along a thrust direction XX.

The lever device 1 further comprises at least one control lever assembly 4 rotatably associated with the pump body 3 and rotatable about a pivot axis Y-Y, the control lever assembly 4 being attached to the piston 6. Connected directly or indirectly.

The control lever assembly 4 comprises at least one control lever 7 adapted to be actuated by the fingers of a vehicle user's hand by actuating the piston 6 in proximity to the handlebar grip.

Said piston 6 comprises a piston bottom 10 which defines at least one chamber 11 with the cylinder wall 9 of the pump body 3 for containing the working fluid of a vehicle brake or clutch. At least one of the cylinder walls 9 of the pump body 3 is interrupted to define at least one supply channel 12 adapted to bring the chamber 11 into fluid communication with at least one associated fluid tank.

The piston bottom 10 is in at least one end position where the volume of the chamber 11 is maximum and in at least a first operating position in which the piston bottom fluidly isolates the chamber 11 from the feed channel 12; It is movable with respect to the cylinder wall 9 of the pump body 3.

The piston 6 defines a stroke-free play 100 between the end position and the first operating position.

The control lever assembly 4 is directly or indirectly connected to the piston 6 at a lever contact portion 50 or a lever contact point 50.

The lever device 1 adjusts the distance between the control lever assembly 4 and the pump body 3 in the thrust direction XX between the end position and the first operating position. It is equipped with an adapted stroke-free play adjusting device 13.

The stroke-free play adjusting device 13 is located between the at least one control lever assembly 4 and the pump body 3 and is adjusted to rotate about the rotation axis Y-Y. , Changing the position of the at least one control lever 7. In particular, it is possible to separate the stroke-free play adjustment from the movement of the lever. Indeed, it is the result of stroke-free play adjustment. Therefore, the user can return the lever to the desired position without further changing the stroke-free play.

The stroke-free play adjusting device 13 is in contact with the pump body 3 at a contact point or a contact area center of gravity of the stroke-free play adjusting device 104.

The first arm distance 101 is defined between the lever contact portion 50 and the rotation axis Y-Y.

The second arm distance 102 is defined between the contact point or contact area center of gravity of the stroke-free play adjusting device 104 and the pivot axis Y-Y.

The ratio between the first arm distance 101 and the second arm distance 102 is between 1.15 and 1.85.

According to an embodiment, the ratio between the first arm distance 101 and the second arm distance 102 is comprised between 1.3 and 1.6.

According to an embodiment, the ratio between the first arm distance 101 and the second arm distance 102 is 1.5.

According to an embodiment, the theoretical rest point of the driver's finger on the control lever 105 or the point of action of the action on the control lever by the user or driver of the vehicle is defined.

Further, the driver's finger distance 106 is defined between the theoretical rest point of the driver's finger on the control lever 105 and the pivot axis YY.

The ratio between the first driver's finger distance 106 and the second driver's finger distance 101 is between 3.5 and 6.5.

According to an embodiment, the ratio between the first driver's finger distance 106 and the second driver's finger distance 101 is comprised between 4 and 6.

According to an embodiment, the ratio of the first driver's finger distance 106 to the second driver's finger distance 101 is 5.

According to the embodiment, the stroke-free play adjusting device 13 adjusts the device even when the vehicle is stopped for a short time, so that the knob 21 that can be accessed by the user of the vehicle even when the vehicle is stopped for a short time. Equipped with.

According to an embodiment, the control lever assembly 4 comprises the control lever 7 extending cantilevered, thus forming a cantilever end 23 and a fixed base 32.

According to the embodiment, the control lever assembly 4 includes a grip portion 24 interposed between the fixed base portion 32 and the cantilever end portion 23.

According to an embodiment, the control lever assembly 4 comprises a hub part or hub 16 opposite the control lever 7 with respect to the pivot axis Y-Y.

According to the embodiment, the control lever 7 and the fixed base portion 32 are configured as an integrated product.

According to an embodiment, the control lever 7 and the fixed base 32 are composed of separate parts.

According to an embodiment, said part of hub 16 is made up of one separate part with respect to said control lever 7 of said control lever assembly 4.

According to an embodiment, said portion of hub 16 is made up of a separate piece with respect to said control lever 7 and said fixed base 32 of said control lever assembly 4.

According to an embodiment, the portion of the hub 16 of the control lever assembly 4 is connected to the stroke-free play adjusting device 13 extending between the portion of the hub 16 of the control lever assembly 4 and the abutment surface 19 of the pump body 3. Associated.

According to an embodiment, the control lever assembly 4 comprises an auxiliary tilt adjustment system 39 adapted to adjust the tilt of the control lever 7.

According to an embodiment, the control lever assembly 4 comprises the control lever 7 extending cantilevered, thus forming a cantilever end 23 and a fixed base 32.

According to the embodiment, the control lever assembly 4 includes a grip portion 24 interposed between the fixed base portion 32 and the cantilever end portion 23.

According to an embodiment, the control lever assembly 4 comprises a hub part or hub 16 opposite the control lever 7 with respect to the pivot axis Y-Y.

According to the embodiment, the control lever 7 and the fixed base portion 32 are configured as an integrated product.

According to an embodiment, the control lever 7 and the fixed base 32 are composed of separate parts.

According to an embodiment, said part of hub 16 is made up of one separate part with respect to said control lever 7 of said control lever assembly 4.

According to an embodiment, said portion of hub 16 is made up of a separate piece with respect to said control lever 7 and said fixed base 32 of said control lever assembly 4.

According to an embodiment, the auxiliary tilt adjusting system 39, or the auxiliary tilt adjusting system of the control lever, or the tilt adjusting auxiliary system 39 is interposed between the fixed base 32 and the portion 16 of the hub. It is adapted to correct the orientation of said fixed base 32 with respect to the portion 16 of the hub and brings the grip 24 of the control lever 7 closer to or further from the vehicle handlebar.

According to an embodiment, the auxiliary tilt adjustment system 39 comprises a knob accessible to a user of the vehicle even during a short stop of the vehicle to adjust the system even during a short stop of the vehicle. ing.

According to an embodiment, the lever device 1 is adapted to calibrate the substance of the stroke-free play 100 of the piston 6 by moving the end position and avoiding rotation of the control lever 7 during this calibration. A stroke-free play calibration device 34 is provided.

According to an embodiment, the stroke-free play calibration device 34 is adapted to calibrate the stroke-free play during assembly or maintenance of the lever device 1.

According to an embodiment, the lever device 1 is inserted between the piston 6 and the control lever assembly 4 and adapted to transmit a thrust action between the control lever assembly 4 and the piston 6. And an element 8 for transmitting the thrust action.

According to an embodiment, the stroke-free play calibration device 34 comprises an adjusting bush 35 associated with the control lever assembly 4. Said adjusting bush 35 is associated with the body of a push rod seat 49, which at least partly defines a seat 48 accommodating a part of said thrust action transmitting element 8.

According to an embodiment, the adjusting bush 35 comprises a threaded portion 38 attached to the threaded portion of the control lever assembly 4 for adjusting the position of the seat 48 with respect to the control lever assembly 4.

According to the embodiment, the adjusting bush 35 includes a bush contact surface 36, and the main body of the push rod seat 49 includes a bush contact facing surface 51. The bush contact surface 36 of the adjusting bush 35 exerts a thrust action on the bush contact facing surface 51 of the body of the push rod seat 49 to adjust the position of the seat 48 with respect to the grip portion 23 of the control lever 7. Is adapted to.

According to an embodiment, the lever device 1 has a brake modulation adapted to adjust the brake modulation by changing the position of the lever contact or the lever contact point 50 with respect to the pivot axis Y-Y, ie the lever ratio. The adjusting device 107 is provided.

According to an embodiment, the brake modulation adjustment device 107 is adapted to adjust the brake modulation by changing the thrust working angle of the control lever assembly 4 with respect to the thrust direction XX of the at least one piston 6. ing.

According to an embodiment, the lever device 1 is inserted between the piston 6 and the control lever assembly 4 and is adapted to transmit a thrust action between the control lever assembly 4 and the piston 6. And an element 8 for transmitting the thrust action.

According to an embodiment, the stroke-free play calibration device 34 comprises a body of a push rod seat 49 at least partially defining a seat 48 accommodating a part of the thrust action transmission element 8.

According to an embodiment, the body of the push rod seat 49 is rotatable about an adjustment axis, and the seat 48 is eccentric to such an adjustment axis so that the vertical distance between the seats 48 is reduced. The position of the seat 48 in the direction and the direction of movement XX of the at least one piston 6 and the vertical distance between the seat 48 and the axis of rotation or pivot axis YY of the control lever, Adjustable by simple rotation of.

According to an embodiment, a change in the position of the seat 48 determines a change in the orientation of the thrust action transmission element 8 with respect to the axis of rotation or pivot axis Y-Y of the control lever 7, and thus a variation in the lever ratio. To do.

According to the embodiment, the brake modulation adjustment device 107 includes a knob that can be accessed by the user of the vehicle even when the vehicle is stopped for a short time, and that the system can be adjusted even when the vehicle is traveling.

The proposed solution allows a transition from normal adjustments to sporty and very sporty adjustments, for example during vehicle suspension, and during short vehicle stops the control lever is not gripped, Grasp, pre-grasp or strongly pre-grasp (eg, to hold handlebars and control levers more securely without activating the piston). Optimal ergonomics (optimum ergonomics in which the lever is not released or grasped or pre-grasped) is maintained with an optimal calibration of piston end position and optimal lever ratio.

It is also possible to separate the adjustments at the same time, according to an alternative proposed embodiment.

-Ergonomics of the grip position of the control lever, possibly even during a brief stop of the vehicle.

Of the calibration of the end position of the piston, and thus of the free play of the piston itself without changing ergonomics.

-Without changing the ergonomics of the lever ratio or the position of the end of the piston, even during a short stop of the vehicle

-Control lever position and piston stroke free play position. Without changing the ergonomics of the control lever itself grip position and lever ratio modulation, in some cases even during vehicle suspension.

With the proposed solution, you get the optimal control lever stroke to feel a firm but tireless grip on your fingers, leaving the proper remaining stroke of the lever to properly brake depending on route and need. Can be adjusted to.

According to many simulations and tests, the position of the control lever corresponding to the simultaneous adjustment of the stroke-free play of the piston is determined by the distance of the first arm between the lever contact portion and the rotation axis, and the stroke-free play adjusting device and To achieve a ratio between the first arm distance and the second arm distance, which is obtained by being proportional to the distance of the second arm between the contact point of the pivot axis or the contact area center of gravity. In addition, it includes between 1.15 and 1.85, further between 1.3 and 1.6, preferably 1.5.

By this ratio, for example, if the driver's finger is theoretically resting on the control lever, or if it is the operating point of action on the control lever by the user of the vehicle or the driver about 80-120 mm from the pivot axis. An adjusting device for adjusting the stroke-free play to only 0.3-0.7 mm, adjusting the stroke-free play 0.55 mm to 1.29 mm, and a control lever of about 2-4 degrees (hexadecimal degree). Can be rotated simultaneously. Stroke-free play and control lever positions are ideal for giving the driver a firm grip on the handlebars and control levers, wanting the vehicle to have a sporty or very sporty setting and giving the driver who wants to feel the right sensation. is there. It controls the vehicle tightly, but it does not get tired and, at the same time, must reach the limit of constantly reacting to the road or truck conditions and the continuous required movement of the lever given by the sporty driving style that requires braking. The shift must be instantaneous and timely.

According to a further embodiment, a lever device 1 for hydraulically actuating a brake or clutch of a vehicle with a handlebar is provided.

The lever device comprises a pump assembly 2.

Said pump assembly 2 comprises a pump body 3 comprising means 47 for connecting to the vehicle handlebars.

The pump body 3 defines a cavity 5. This allows the pump body 3 to act as a cylinder of a cylinder-piston assembly.

The pump assembly 2 further comprises at least one piston 6 operably associated with the pump body 3 to be configured to slide within the cavity 5 along a thrust direction XX. .. The thrust direction XX substantially coincides with the moving direction of the piston 6 with respect to the pump body 3.

The lever device 1 further comprises at least one control lever assembly 4 rotatably associated with the pump body 3 for rotation about a pivot axis Y-Y.

According to a further embodiment, the control lever assembly 4 comprises at least one control lever 7. Preferably, the control lever 7 is configured to be operated by the vehicle driver. According to an embodiment, the control lever assembly 4 comprises a control lever 7 which extends in a cantilevered manner and thus forms a cantilevered end 23, and a fixed base 32 which connects the control lever 7 to the pump body 3. Equipped with. Preferably, the fixed base 32 is pivotally attached to a part of the pump body 3. Preferably, the control lever 7 and the fixed base 32 are made up of separate parts and are assembled to the fixed base 32 by a fixing element 37 of the control lever 7. Alternatively, the control lever 7 and the fixed base portion 32 are integrally formed. Preferably, the control lever assembly 4 comprises a grip 24 sandwiched between the fixed base 32 and the cantilever end 23.

The control lever 4 is directly or indirectly connected to the piston 6. As a result, when the user of the vehicle equipped with the handlebar operates the control lever 7, it is determined that the piston 6 has an effect.

Said piston 6 comprises a piston bottom 10 defining at least one chamber 11 having a cylinder wall 9 of the pump body 3 for containing the working fluid of a vehicle brake or clutch. According to an embodiment, the piston bottom 10 comprises at least one piston bottom gasket 14. According to a further embodiment, the piston 6 comprises a further piston gasket 46.

At least one of the cylinder walls 9 of the pump body 3 is interrupted so as to define at least one supply channel 12 configured to bring the chamber 11 into fluid communication with at least one associated fluid tank. ing. For example, the fluid tank is a brake fluid tank. For example, the fluid tank can be housed in the handlebar. According to the embodiment, the brake fluid tank is configured integrally with the pump body 3.

According to an embodiment, the piston bottom 10 is at least one end position where the volume of the chamber 11 is maximized and at least one piston bottom 10 fluidly isolates the chamber 11 from the supply channel 12. It is movable with respect to the cylinder wall 9 of the pump body 3 within a range of the two first operating positions. The piston 6 defines a stroke-free play 100 between the end position and the first operating position.

By closing the control lever, the operator determines the movement of the piston 6 so as to gradually reduce the volume of the chamber 11. As long as the supply channel 12 is in fluid communication with the chamber 11, the working fluid can flow towards the fluid tank. By moving the piston bottom 10 to close the supply channel 12, a thrust action on the working fluid that determines the operation of the system connected to the pump assembly 2, which may be the brake or clutch of a vehicle with handlebars. Is determined. By increasing the pressure on the control lever 7, a further displacement of the piston 6 is obtained, which further reduces the volume of the chamber 11. In the absence of driver action, the piston 6 returns to its final position by the action of the return spring of the piston 15, pushing the control lever 7 to the rest position.

According to a further embodiment, the lever device 1 comprises at least one stroke free configured to adjust a distance along the thrust direction XX between the end position and the first operating position. The play adjusting device 13 or the adjusting device 13 is provided.

Providing the stroke-free play adjustment device 13 allows the user to quickly adjust the stroke-free play 100 of the piston 6 at any time, for example during a short stop of the vehicle.

Further advantageously, the lever device 1 comprises the at least one stroke-free play adjusting device 13 between the control lever assembly 4 and the pump body 3.

Providing the at least one stroke-free play adjusting device 13 arranged between the control lever assembly 4 and the pump body 3 adjusts the stroke-free play while maintaining a small number of inter-assembled parts. Enable that. Furthermore, the direct placement of said at least one stroke-free play adjusting device 13 in the body of the piston 6 is avoided. As a result, weakening of the piston 6 is avoided by the adjustment hole provided in the body of the piston 6, for example. It is therefore possible to obtain a stronger piston 6 of equal size and material with respect to the known solutions. Furthermore, the risk of leakage or loss of working fluid resulting from the provision of holes in the piston body is minimized.

According to an embodiment, the stroke-free play adjustment device 13 comprises a knob 21 accessible by a user of a vehicle equipped with a handlebar. This makes it possible to adjust the stroke-free play 100 of the position of the piston 6 and the control lever 7 by acting on a knob 21 arranged in a position accessible to the vehicle user, and thus for example parking conditions. It enables the stroke-free play 100 to be adjusted quickly in the conditions of use of the vehicle with the handlebars without removing the lever device 1 and without using an adjusting tool.

According to an embodiment, the lever device 1 is arranged between the piston 6 and the control lever assembly 4 and configured to transmit a thrust action between the control lever assembly 4 and the piston 6. Further provided is an element 8 for transmitting the thrust action. According to an embodiment, said element 8 for transmitting a thrust action is made in one piece with said control lever assembly 4. For example, the element 8 for transmitting thrust action is constructed in one piece with the fixed base 32 of the control lever assembly 4.

According to an embodiment, said element 8 for transmitting thrust action is made in one piece with said piston 6. According to an embodiment, said element 8 for transmitting a thrust action comprises a lever contact 50 associated with said control lever assembly 4. According to an embodiment, said element 8 for transmitting a thrust action comprises a shaft. According to an embodiment, said element for transmitting a thrust action comprises a push rod. According to an embodiment, said element 8 for transmitting thrust action is associated with a dust cuff 33 which prevents impurities from entering the cavity 5 of the pump assembly 2.

According to the embodiment, the control lever assembly 4 operates as a class 1 lever and comprises a part of the hub 16 on the side opposite to the control lever 7 with respect to the pivot axis Y-Y. Providing said portion of hub 16 of said control lever assembly 4 makes it possible to form a class 1 lever having a preferred arm around said pivot axis Y-Y.

According to an embodiment, the distance of the first arm 101 is defined between said pivot axis Y-Y and the part of the control lever 4 which is directly or indirectly connected to the piston 6. According to an embodiment, the distance of the first arm 101 is defined as the distance between the pivot axis YY and the lever contact part 50 of the element 8 for transmitting a thrust action. Preferably, the distance of the first arm 101 is greater than the distance between the pivot axis Y-Y and the first portion of the hub 16. Preferably, the distance of the first arm 101 is greater than the distance of the second arm 102 between the pivot axis YY and the stroke free play adjuster 13 associated with the portion of the hub 16. Is also big.

Preferably, the pump body 3 is configured to form at least one abutment reference for the portion of the hub 16 opposite the control lever 7 with respect to the pivot axis Y-Y. A contact surface 19 is provided. According to an embodiment, the lever device 1 is provided on both the pump body 3, the control lever assembly 4 and the part of the hub 16 so as to rotatably associate the control lever assembly 4 with the pump body 3. The fixing pin 29 inserted in the coaxial hole is provided. For example, the fixing pin 29 can cooperate with the fastening nut 30. For example, the fixing pin 29 can cooperate with the bush 31.

According to an embodiment, said part of hub 16 is made up of one separate part with respect to said control lever 7 of said control lever assembly 4. According to an embodiment, said portion of hub 16 is made up of separate parts with respect to said control lever 7 and said fixed base 32 of said control lever assembly 4.

According to an embodiment, said portion of hub 16 of control lever assembly 4 is said stroke-free play adjusting device which extends between said portion of hub 16 of control lever assembly 4 and abutment surface 19 of pump body 3. Associated with 13.

Thereby, and by providing said distance of the first arm 101 smaller than said distance of the second arm 102, a displacement of the part of the hub 16 which advantageously determines a larger displacement of the control lever 7 is enabled. It

Providing such a stroke-free play adjusting device 13 arranged between said part of the hub 16 of the control lever assembly 4 and said abutment surface 19 of the pump body 3 makes it possible for the hub 16 in the event of a pin 17 failure. It allows the part to abut the abutment surface 19 of the pump body 3 and thus the value of the stroke-free play 100 of the piston 6 is within the range of values established during installation or assembly in the factory. Allows you to maintain.

The shape of the part of the hub 16 with the abutment configured to abut the abutment surface of the pump body 3 is such that during the assembly step of the lever device 1 within a given position a stroke free play adjusting device. Force the user to activate 13.

Providing such a part of the hub 16 with the stroke-free play adjusting device 13 makes it possible to correct the inclination of the control lever 7 with respect to the pump body 3. Providing such a part of the hub 16 with the stroke-free play adjusting device 13 makes it possible to correct the inclination of the control lever 7 with respect to the thrust direction XX of the piston 6.

By providing the control lever assembly 4 with such a stroke-free play adjusting device 13 associated with a part of the hub 16, for example transverse to the thrust direction X-X which would cause structural weakening of the piston 6 itself. Providing an orienting hole for the stroke-free play 100 of the piston in the piston body 6 is avoided. It is therefore possible to obtain a stronger piston 6 of equal size and material with respect to the known solutions. Therefore, a user needs a high braking force without increasing the size of the pump assembly 2, for example, an automobile with a handlebar, a racing car with a handlebar, or a high-performance vehicle with a handlebar. At stroke free play can be adjusted. At the same time, it allows the user to adjust the stroke-free play on a light vehicle such as a bicycle, minimizing the dimensions of the pump assembly.

According to a preferred embodiment, said portion of hub 16 is associated with said stroke free play 13 extending between said portion of hub 16 of control lever assembly 4 and said abutment surface 19 of pump body 3, said stroke The free play adjusting device 13 includes a pin 17 having an eccentric rod 18 that directs a rod surface 20 toward the contact surface 19 of the pump body 3. The eccentric rod 18 of the pin 17 has a transverse section eccentric with respect to its longitudinal pin axis ZZ, for example the transverse section has a cam profile. When the control lever 7 is in the rest position, the rod surface 20 of the eccentric rod 18 contacts the contact surface 19 of the pump body 3. According to an embodiment, the longitudinal axis Z-Z of the pin is parallel to the pivot axis Y-Y.

By rotating the pin 17 of the stroke-free play adjusting device 13 in its working direction 99 about its longitudinal axis of rotation ZZ, it causes different parts of the rod surface 20 of the eccentric rod 18 to be pumped on the pump body 3. Of the contact surface 19 of the above. This determines the rest position of the control lever 7 with respect to the pump body 3. Therefore, it is possible to determine the end position of the piston 6 when the control lever 7 is in the rest position. Therefore, the stroke-free play 100 of the piston 6 can be adjusted.

According to an embodiment, the distance of the second arm 102 is configured to form a contact reference for the pivot axis Y-Y and the rod surface 20 of the stroke-free play adjusting device 13. It is the distance between the contact surface 19 of the pump body 3.

According to an embodiment, the pin 17 of the stroke-free play adjustment device 13 is associated with the knob 21 accessible by a user of a vehicle equipped with a handlebar. Thereby, the stroke-free play can be adjusted without directly removing the lever device 1 during traveling.

According to an embodiment, the pin 17 comprises an eccentric rod 18 and a rod engagement part 22 longitudinally spaced from the eccentric rod 18 along the longitudinal axis Z-Z of the pin. , The rod engagement portion 22 is biased by a positioning spring 27 that abuts the rod engagement portion 22 so as to define a stable and separate rotational position during rotation of the pin 17 of the stroke-free play adjusting device 13. It defines a groove 25 which cooperates with the positioned positioning ball 26. This allows stroke-free play to occur at certain stable, unobtrusive predetermined positions.

According to the embodiment, the rod engaging portion 22 includes three grooves 25 that are circumferentially spaced from each other. Thereby, three predetermined positions of the eccentric rod 18 are defined with respect to the control lever 4 and the pump body 3. Therefore, the stroke-free play 100 and the control lever 7 can be adjusted three times. Alternatively, the rod engaging portion 22 may comprise a different number of grooves 25, for example three grooves or at least four grooves 25. Alternatively, the rod engagement portion 22 may be configured to allow continuous adjustment.

According to an embodiment, the adjusting device 13 comprises an elastic ring 28 which at least partially surrounds a part of the pin 17 and which lies between the adjusting knob 21 and the part of the hub 16.

According to an embodiment, the lever device 1 is configured to calibrate the stroke-free play 100 of the piston 6 without changing the position of the control lever 7, for example during assembly or maintenance steps in the workplace. A play calibration device 34 is provided. According to a preferred embodiment, the stroke-free play calibrating device 34 is interposed between the control lever assembly 4 and the piston 6 and functions in contrast to the device 13, whereby the lever is moved to 19. Hold against, 19 does not move, only the piston moves.

The provision of the stroke-free play calibration device 34 makes it possible to adjust the stroke-free play 100 of the piston 6 during assembly or maintenance steps, for example in the workplace, to obtain the maximum desired stroke-free play. To do.

The stroke-free play calibration device 34 interposed between the control lever assembly 4 and the piston 6, and the stroke-free play adjustment device 13 interposed between the control lever assembly 4 and the pump body 3. By arranging the above, it is possible to calibrate the stroke free play 100 of the piston and adjust the stroke free play under the use condition of the vehicle during the vehicle assembly step and the maintenance step. At the same time, the provision of the stroke-free play calibration device 34 makes it possible to set limits on the range of possible adjustments to be carried out by the stroke-free play adjusting device 13.

According to an embodiment, the stroke-free play calibration device 34 comprises an adjusting bush 35 associated with the control lever assembly 4, the adjusting bush 35 forming part of the element 8 for transmitting a thrust action. Associated with the body of a pushrod seat 49 that at least partially partitions the seat 48 that it houses. Thereby, the element 8 for transmitting thrust action acts between the adjusting bush 35 mounted on the control lever assembly 4 and the piston 6.

According to the embodiment, the adjusting bush 35 includes a bush contact surface 36, the main body of the push rod seat 49 includes a bush contact facing surface 51, and the bush contact surface 36 of the adjusting bush 35 includes: In order to adjust the position of the seat 48 with respect to the grip portion 23 of the control lever 7, a thrust action is exerted on the bush contact facing surface 51 of the body of the push rod seat 49. According to an embodiment, the adjusting bush 35 is provided with a threaded housing provided on the control lever assembly 4 for adjusting the bush contact surface 36 of the adjusting bush 35 with respect to the grip 23 with respect to the control lever 7. A threaded portion 38 for engaging with. By providing the threaded portion 38 by screwing or unthreading the adjusting bush 35, it is possible to calibrate the stroke-free play 100 of the piston during assembly or maintenance steps, for example in the workplace. Preferably, the threaded housing is provided on the portion of the hub 16 of the control lever assembly 4.

According to the embodiment, the adjusting bush 35 is sequentially fixed by the bush fixing dowel 52. This also allows the vehicle user to prevent accidentally tampering with stroke-free play calibration, especially factory stroke-free play performance settings. When the pump is a brake master cylinder, this would mean the effect of compromising the braking action.

According to an embodiment, the lever device 1 is a lever device for actuating a brake of a vehicle with a handlebar and comprises a switch 40 for optical signaling of the brake. Preferably, the switch 40 for brake light signaling is actuated by any adjustment of the stroke-free play 100 adopted by the vehicle user.

According to an embodiment, the control lever assembly 4 comprises an auxiliary tilt adjustment system 39 adapted to adjust the tilt of the control lever 7 without changing the free play of the piston. In other words, the auxiliary tilt adjustment system 39 changes the orientation of the fixed base 32 with respect to the portion of the hub 16 to move the grip 24 of the control lever 7 closer to or further from the vehicle handlebar. Is configured.

According to an embodiment, for example, as shown in FIG. 14, the stroke-free play adjusting device 13 comprises a pin 17 having a rod including a tapered eccentric portion 54 of the rod. Preferably, the tapered rod portion 54 increases its lateral dimension in the longitudinal pin axis Z-Z and moves it away from the knob 21. Thereby, the rod surface 20 has a truncated cone shape. This allows the stroke-free play 100 to be adjusted or calibrated during the assembly or maintenance steps, and thus the taper portion of the rod in the actuation direction 99 oriented substantially parallel to the longitudinal pin direction ZZ. The sliding of 54 is determined. According to an embodiment, the stroke-free play adjusting device 13 comprises a pin 17 having an eccentric rod 18 with a tapered portion 54 of the rod. Thereby, by determining the sliding of the taper portion 54 of the rod in the operating direction 99 oriented in a direction substantially parallel to the longitudinal axis Z-Z of the pin and in the operating direction Z-Z. It is possible to adjust or calibrate the stroke-free play 100 by rotating the pin 17 around. This, in combination with the increased fineness of adjustment, makes it possible to increase the number of possible positions of the adjusting device 13.

For example, according to the variant shown in FIGS. 12 and 12-2, the stroke-free play adjusting device 13 is provided on the part of the hub 16 and when the control lever assembly 4 is in the rest position, the pump body 3 is provided. A threaded adjustment ring nut 41 comprising a surface of a ring nut 44 configured to abut the abutment surface 19 of FIG. The provision of the threaded adjustment ring nut 41 according to this variant makes it possible to adjust the stroke-free play by screwing or unscrewing the threaded adjustment ring nut 41 onto the threaded shaft. To do.

For example, according to a variant shown in FIGS. 13 and 2 of FIG. 13, the stroke-free play adjusting device 13 is housed in a threaded adjusting seat provided in the part of the hub 16 and the control lever assembly 4 is at rest. It comprises a threaded adjusting pushrod 42 including a part of the pushrod 43 with the surface of the pushrod 45 arranged to abut the abutment surface 19 of the pump body 3 when in position. The provision of the threaded adjustment push rod 42 according to this variant is achieved by screwing or unscrewing the threaded adjustment push rod 42 to a threaded seat provided in the part of the hub 16 for stroke. Allows you to adjust the free play.

A person skilled in the art can make many variations and adaptations to the above described embodiments or functionally equivalent without departing from the scope of the appended utility model registration claims. You can replace the element with another.

DESCRIPTION OF SYMBOLS 1 Lever device 2 Pump assembly 3 Pump body 4 Control lever assembly 5 Cavity 6 Piston 7 Control lever 8 Elements for transmitting thrust action 9 Cylinder wall 10 Piston bottom 11 Chamber 12 Supply channel or fluid supply channel 13 Stroke free play adjusting device Or adjusting device 14 piston bottom gasket 15 piston return spring 16 hub part or hub 17 pin 18 eccentric rod 19 abutting surface 20 rod surface 21 adjusting knob 22 rod engaging portion 23 cantilever end 24 gripping portion 25 groove 26 positioning Ball 27 Positioning spring 28 Elastic ring 29 Fixing pin 30 Nut 31 Bushing 32 Control lever assembly fixed base 33 Dust cuff 34 Stroke free play calibration device 35 Adjusting bush 36 Bushing abutment surface 37 Fixing element of control lever against fixed base 38 Adjusting bush screw Fittings 39 Controlled auxiliary tilt adjustment system or auxiliary tilt adjustment system 40 Switch 41 Adjusting ring nut 42 Adjusting push rod with screw 43 Push rod part 44 Adjusting ring nut surface 45 Push rod surface 46 Further piston gasket 47 Connecting means 48 Seat 49 Push Rod seat 50 Lever contact part or lever contact point 51 Bush contact facing surface 52 Bush fixing dowel 54 Rod taper part 99 Actuating direction of adjusting device 100 Stroke free play 101 First arm distance 101a General direction of extension of control lever Projection of first arm distance along 102 102 Second arm distance 102a Projection of second arm distance along general direction of extension of control lever 103 Control lever assembly 104 Stroke free play adjuster and stop surface The contact point of the stroke-free play adjusting device between the contact point and the contact area center of gravity 105 The logical rest point of the driver's finger on the control lever , Or the logical action point on the control lever 106 The distance between the driver's finger or the distance between the rotation axis and the logical action point on the control lever 107 Brake modulation adjusting device XX Thrust direction Y- Y rotation axis ZZ Pin longitudinal axis

Claims (14)

In a lever device (1) comprising at least one pump assembly (2) for hydraulically actuating a brake or clutch of a vehicle with handlebars, said at least one pump assembly comprising:
A pump body (3) comprising a connecting device (47) to the vehicle handlebar, the pump body (3) defining a cavity (5);
-Comprising said pump body (3) and at least one piston (6) operably associated therewith, such that it is suitable for sliding in said cavity (5) along a thrust direction (XX). ,
Said lever device (1) further comprising at least one control lever assembly (4) rotatably associated with said pump body (3) for rotation about a pivot axis (Y-Y), A control lever assembly (4) is directly or indirectly connected to the piston (6) such that the control lever assembly (4) approaches the handlebar grip to actuate the piston (6). By providing at least one control lever (7) adapted to be actuated by the fingers of the user of the vehicle,
A piston bottom (10) in which the piston (6), together with the cylinder wall (9) of the pump body (3), defines at least one chamber (11) for containing a working fluid of the vehicle brake or clutch. At least one supply, wherein at least one of said cylinder walls (9) of said pump body (3) is suitable for fluidizing said chamber (11) with at least one accessible fluid tank. Interrupted to partition the channel (12),
The piston bottom (10) is against the cylinder wall (9) of the pump body (3),
At least an end position where the chamber (11) has a maximum volume;
At least a first operating position in which the piston bottom fluidly isolates the chamber (11) from the feed channel (12);
It is possible to move within the range of
The piston (6) defines a stroke-free play (100) between the end position and the first operating position,
The control lever assembly (4) is directly or indirectly connected to the piston (6) at a lever contact (50),
The lever device (1) is arranged between the control lever assembly (4) and the pump body (3) in a thrust direction (XX) between the end position and the first operating position. A stroke-free play adjustment device (13) adapted to adjust the distance along,
The stroke-free play adjusting device (13) is adapted to adjust the position of the at least one control lever (7) by rotating it about the pivot axis (Y-Y) so as to correct it. Disposed between one control lever assembly (4) and the pump body (3),
The stroke-free play adjusting device (13) contacts the pump body (3) at a contact point or a contact area center of gravity of the stroke-free play adjusting device (104),
A first arm distance (101) is defined between the lever contact portion (50) and the pivot axis (Y-Y),
A second arm distance (102) is defined between the contact point or contact area center of gravity of the stroke-free play adjuster (104) and the pivot axis (YY).
A lever device (1), characterized in that the ratio of the first arm distance (101) to the second arm distance (102) is comprised between 1.15 and 1.85. The ratio of the first arm distance (101) to the second arm distance (102) is comprised between 1.3 and 1.6, and/or
The lever device (1) according to claim 1, wherein the ratio of the first arm distance (101) and the second arm distance (102) is 1.5. A theoretical rest point of the driver's finger on the control lever (105) or an actuation point of action on the control lever is defined by the user or driver of the vehicle,
A driver's finger distance (106) is defined between the theoretical rest point of the driver's finger on the control lever (105) and the pivot axis (Y-Y),
The ratio of the driver's finger distance (106) and the first arm distance (101) is comprised between 3.5 and 6.5, and/or
The ratio of the driver's finger distance (106) and the first arm distance (101) is comprised between 4 and 6 and/or
The lever device (1) according to claim 1, wherein the ratio of the distance (106) of the driver's finger and the first arm distance (101) is 5. The stroke-free play adjusting device (13) comprises a knob (21) accessible by the user of the vehicle while the vehicle is running, for adjusting the device while the vehicle is running, Lever device (1) according to claim 1. Said control lever assembly (4) comprises said control lever (7) extending in a cantilevered manner thereby forming a cantilevered end (23) and a fixed base (32),
The control lever assembly (4) comprises a grip (24) interposed between the fixed base (32) and the cantilevered end (23),
Said control lever assembly (4) comprises a hub portion (16) opposite said control lever (7) with respect to said pivot axis (Y-Y), and/or
Said control lever (7) and said fixed base (32) are made in one piece and/or
Said control lever (7) and said fixed base (32) are composed of separate parts and/or
Said portion (16) of the hub is composed of a separate part with respect to said control lever (7) of said control lever assembly (4), and/or
Said portion (16) of the hub is composed of a separate part with respect to said control lever (7) and said fixed base (32) of said control lever assembly (4), and/or
The hub portion (16) of the control lever assembly (4) is between the hub portion (16) of the control lever assembly (4) and the abutment surface (19) of the pump body (3). 2. Lever arrangement (1) according to claim 1, associated with said stroke-free play adjustment device (13) extending. The lever device (1) according to claim 1, wherein the control lever assembly (4) comprises an auxiliary tilt adjustment system (39) suitable for adjusting the tilt of the control lever (7). Said control lever assembly (4) comprises said control lever (7) extending in a cantilevered manner thereby forming a cantilevered end (23) and a fixed base (32),
The control lever assembly (4) comprises a grip (24) interposed between the fixed base (32) and the cantilevered end (23),
Said control lever assembly (4) comprises a hub portion (16) opposite said control lever (7) with respect to said pivot axis (Y-Y), and/or
Said control lever (7) and said fixed base (32) are made in one piece and/or
Said control lever (7) and said fixed base (32) are composed of separate parts and/or
Said portion (16) of the hub is composed of a separate part with respect to said control lever (7) of said control lever assembly (4), and/or
Said portion (16) of the hub is composed of separate parts with respect to said control lever (7) and said fixed base (32) of said control lever assembly (4), and/or
The auxiliary tilt adjustment system (39) is interposed between the fixed base (32) and the hub portion (16) to correct the orientation of the fixed base (32) with respect to the hub portion (16). A lever device (1) according to claim 1, adapted so that the grip (24) of the control lever (7) is moved closer to or further away from a vehicle handlebar. The auxiliary tilt adjustment system (39) comprises a knob accessible by a user of the vehicle even when the vehicle is briefly stopped to adjust the system even when the vehicle is briefly stopped. The lever device (1) according to item 1. The lever device (1) calibrates the substance of the stroke-free play (100) of the piston (6) by moving the end position and avoiding rotation of the control lever (7) during this calibration. The lever device (1) according to claim 1, comprising a stroke-free play calibration device (34) adapted in this way. The stroke-free play calibration device (34) is adapted to calibrate stroke-free play during the assembly or maintenance step of the stroke-free play device (1), and/or
The lever device (1) is interposed between the piston (6) and the control lever assembly (4) and transmits a thrust action between the control lever assembly (4) and the piston (6). An element (8) for transmitting a thrust action adapted and/or
The stroke-free play calibration device (34) comprises an adjusting bush (35) associated with the control lever assembly (4), the calibration bush (35) being the element (8) for transmitting thrust action. Associated with the body of a push rod seat (49) that at least partially partitions a seat (48) that houses a portion of, and/or
The calibration bush (35) comprises a threaded portion (38) attached to a threaded portion of the lever assembly (4) for calibrating the position of the seat (48) relative to the control lever assembly (4), and / Or
The calibration bush (35) has a bush contact surface (36), the body of the push rod seat (49) has a bush contact facing surface (51), and the bush contact of the calibration bush (35). A surface (36) thrusts against the bushing abutting surface (51) of the body of the pushrod seat (49) to calibrate the position of the seat (48) in the thrust direction XX. A lever device (1) according to claim 1, adapted to add. The lever device (1) is adapted to adjust the modulation of the brake by changing the position of the lever contact or the lever contact point (50) with respect to the pivot axis (Y-Y), ie the lever ratio. The lever device (1) according to claim 1, comprising a brake modulation adjustment device (107). The brake modulation adjustment device (107) is adapted to adjust brake modulation by changing a thrust working angle of the control lever assembly (4) with respect to the thrust direction XX of the at least one piston (6). Lever device (1) according to claim 1, wherein The lever device (1) is interposed between the piston (6) and the control lever assembly (4) and transmits a thrust action between the control lever assembly (4) and the piston (6). An element (8) for transmitting a thrust action adapted to
The stroke-free play calibration device (34) comprises a body of a push rod seat (49) that at least partially partitions a seat (48) containing a portion of the thrust transmission element (8);
The body of the push rod seat (49) is rotatable about an adjustment axis and the seat (48) is eccentric with respect to such an adjustment axis so that the seat (48) and at least one piston ( 6) Seat in the direction of vertical distance between the moving direction (XX) and in the vertical distance between the seat (48) and the rotation axis or the rotation axis (Y-Y) of the control lever. The position of (48) is adjustable by simple rotation of the body of said rod seat (49), and/or
A change in the position of the seat (48) causes a change in the direction of the thrust action transmission element (8) with respect to the rotation axis or the rotation axis (Y-Y) of the control lever (7), and thus a change in the lever ratio. Lever device (1) according to claim 1, determining. The brake modulation adjustment device (107) comprises a knob (21) accessible by the user of the vehicle while the vehicle is traveling, for adjusting the device while the vehicle is traveling. The lever device (1) according to 1.

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