Tricycle vehicle including an automatic parking brake system.

Abstract

A tricycle vehicle comprising an automatic parking brake system. The tricycle vehicle (1) comprises a chassis (2) including a front frame (3) configured for the installation of a driver of said tricycle vehicle (1) on a saddle (41), and a rear frame (5), said front frame (3) being articulated in rotation about an articulation axis (23) relative to the rear frame (5) so as to allow the front frame (3) relative to the rear frame (5) to tilt towards the roadway on either side of a vertical position, the tricycle vehicle (1) being particular in that it comprises a parking brake system (8) configured to alternately block or unlock said tilting of the front frame (3) automatically when respectively at least one blocking condition or at least one unlocking condition is satisfied.Thus, the ergonomics of the tricycle (1) can be improved without any particular action being required from the driver. This notably results in time savings and increased comfort for the driver. See Figure 1 for abbreviations.

Description

Title of the invention: Tricycle vehicle comprising an automatic parking brake system. technical field

[0001] The present invention relates to a tricycle vehicle, in particular a motorized tricycle vehicle, comprising an automatic parking brake system. More particularly, the automatic parking brake is intended for a tricycle vehicle having a pendulum device. State of the art

[0002] In the field of cycling, two-wheeled cycles of the so-called "scooter" type are already known and appreciated for the riding comfort they provide due to the rider's positioning. However, when it comes to transporting heavy loads, they can prove unsuitable, particularly due to a lack of stability, whether in motion or at a standstill.

[0003] To improve the stability of a cycle, it is known to use a three-wheeled cycle, or tricycle. However, these present problems with maneuverability, particularly turning radii.

[0004] Tricycles with a pair of wheels at the front have been proposed and are now commonly used due to their good maneuverability. However, their stability is less than that of a conventional tricycle (with two wheels at the rear). A conventional tricycle whose frame is made of several articulated parts is also known from document FR 3020335, allowing a front section to tilt laterally relative to a rear section to improve the tricycle's maneuverability.

[0005] However, such a tricycle is not entirely satisfactory from an ergonomic point of view. For example, when the driver stops and gets off the tricycle, it may be necessary to lock at least the tilting mechanism to stabilize and secure the tricycle. In particular, in certain applications such as a delivery tricycle, the driver has to make many stops and therefore lock the tilting mechanism very frequently. Furthermore, the driver may fail to activate the tilting lock, which can cause stability and safety problems. Known tricycles can therefore be a hindrance to the driver's efficiency and comfort, at least with regard to locking the tilting mechanism of a part of the chassis.

[0006] There is therefore a need to find a solution to improve the ergonomics of such a tricycle. Description of the invention

[0007] The present invention aims to remedy the aforementioned drawbacks. It relates to a tricycle vehicle comprising a chassis made of at least two parts that can pivot relative to each other, said chassis comprising a front frame equipped with a front wheel and configured for the installation of a driver of said tricycle vehicle on a saddle, and a rear frame equipped with two rear wheels, said front frame being articulated in rotation about an articulation axis relative to the rear frame so as to allow the front frame to tilt relative to the rear frame in the direction of the road on either side of a vertical position.

[0008] According to the invention, the tricycle vehicle includes a parking brake system and a management system, said parking brake system being configured to be controlled by the management system so as to alternately block said tilting of the front frame automatically when at least one blocking condition is met or unblock said tilting of the front frame when at least one unblocking condition is met.

[0009] Thus, thanks to the present invention, it is possible to assist the driver by simply and automatically improving the ergonomics of the tricycle. No action is required from the driver to prevent tipping and ensure good stability of the tricycle under the conditions considered. Consequently, when the conditions are right, the driver no longer has to worry about managing the stability of the tricycle when parked, which represents a saving of time and increased comfort for the driver.

[0010] Advantageously, the tricycle vehicle includes a pendulum device comprising a bearing linked to the front frame and a shaft linked to the rear frame, said bearing being articulated in rotation about said shaft, the longitudinal axis of said shaft corresponding to the articulation axis allowing the tilting of the front frame, the parking brake system being configured to alternately block the bearing in rotation so as to block the tilting of the front frame or unblock the bearing in rotation so as to unblock the tilting of the front frame.

[0011] In a particular embodiment, the parking brake system includes at least one brake caliper equipped with at least one pair of shoes, said brake caliper being fixed to the rear frame, the pendulum device further comprising a disc fixedly connected to the bearing, the disc extending angularly and perpendicularly around the bearing, said brake caliper being configured to alternately bring the shoes closer to the disc so that said shoes come into contact with said disc so as to block the bearing from rotating or to move the shoes away from the disc so that said shoes release said disc so as to unblock the rotation of the bearing.

[0012] Advantageously, the parking brake system includes at least a first master cylinder and an actuator, the management system being configured to control the actuator so that said actuator controls the first master cylinder, said first master cylinder being configured to alternately bring the brake caliper jaws closer together or further apart when controlled by the actuator.

[0013] Preferably, the actuator for controlling the first master cylinder is a linear actuator.

[0014] In another particular embodiment, the parking brake system includes at least one electric brake actuator, the management system being configured to control the electric brake actuator, the electric brake actuator being configured to alternately bring the brake caliper jaws closer together or further apart when controlled by the management system.

[0015] In a particular embodiment, the parking brake system includes a second master cylinder configured to be manually actuated so as to alternately block or unblock the tilting of the front frame.

[0016] In a particular embodiment, the parking brake system is configured to alternately block or simultaneously unlock the tilting of the front frame and a forward and / or backward movement of the tricycle vehicle.

[0017] Thus, with a single action (automatic or manual), it is possible to further improve the ergonomics of the tricycle vehicle. Indeed, since the locking or unlocking of the front frame's tilting mechanism and the locking or unlocking of the tricycle vehicle's movement are performed automatically at the same time, the driver benefits from greater time savings and comfort.

[0018] In a particular embodiment, the front frame seat includes a detector for the presence or absence of the driver on said seat, the parking brake system being configured to be controlled by the management system to implement said automatic locking when the following locking conditions are met: - the tricycle vehicle has a speed less than or equal to a predetermined speed; and - the absence of the rider on the front frame seat is detected by said detector.

[0019] Thus, the driver can leave the tricycle vehicle when stopped without having to worry about activating the parking brake.

[0020] In a particular embodiment, the tricycle vehicle includes an ignition lock configured to receive an ignition key and a driving mode selector for the tricycle vehicle, the front frame seat further comprising a detector for the presence or absence of the driver on said seat, the braking system parking being configured to be controlled by the management system to implement said automatic unlocking when the following unlocking conditions are met: - the ignition key is in a driving position in the ignition lock; - the drive mode selector is in a forward or reverse position; and - the presence of the driver on the front frame seat is detected by said detector. Brief description of the figures

[0021] The accompanying figures will clearly illustrate how the invention can be implemented. In these figures, identical reference numerals designate similar elements.

[0022] Fig. 1 is a side view of a tricycle vehicle comprising a pendulum device and a parking brake system according to a particular embodiment.

[0023] Fig. 2 is a detailed perspective view of a particular embodiment of a parking brake system allowing a locking and unlocking of a pendulum device.

[0024] Fig. 3 is a detailed perspective view of a pendulum device according to a particular embodiment.

[0025] Fig. 4 is a schematic view of another particular embodiment of a parking brake system allowing a locking and unlocking of a pendulum device.

[0026] Fig. 5 is a view of two tricycle vehicles according to a particular embodiment illustrating a tilting of a front frame relative to a rear frame to the right and to the left. Detailed description

[0027] The tricycle vehicle 1 (hereinafter referred to as vehicle 1) illustrating the present invention is shown in [Fig. 1] to [Fig. 4] in particular embodiments. As illustrated in [Fig. 1], the vehicle 1 comprises a chassis 2 made of two articulated parts. The chassis 2 includes a front frame 3 with a front wheel 4 and a rear frame 5 with two rear wheels 6.

[0028] The vehicle 1 includes a pendulum device 7 for articulating the front frame 3 and the rear frame 5, as explained in detail below. Furthermore, the vehicle 1 is special in that it also includes a parking brake system 8 (also called a parking brake system) for automatically locking or unlocking at least the pendulum device 7, as specified below.

[0029] The front frame 3 is intended for the installation of a driver (not shown) of the vehicle 1. In the embodiment of [Fig.1], the front frame 3 comprises a frame 9 on which a saddle 41 and a front assembly 10 are attached.

[0030] Typically, the front assembly 10 comprises a steering fork 11, a handlebar 12, and the front wheel 4. The steering fork 11 is rotationally articulated on the front frame 3 to allow the front wheel 4 to be steered left or right. The handlebar 12 is connected to the steering fork 11 to allow its orientation by the rider. The front wheel 4 is free to rotate about an axle 13 connected to the steering fork 11. Said front wheel 4 is equipped with a braking system 14, for example, a disc brake, actuated from the handlebar 12. Said front assembly 10 further comprises a suspension system 15 for damping the shocks transmitted to the handlebar 12 and the frame 9 from impacts absorbed by the front wheel 4. This is, for example, a suspension system of the pneumatic cylinder and / or spring type.

[0031] Furthermore, the front frame 3 may include various trim pieces (not shown) attached to the frame 9 and allowing certain parts of the front frame 3 to be concealed, such as part of the steering fork 11.

[0032] Preferably, the frame 9 has a configuration allowing the vehicle to offer a scooter-like appearance, i.e. allowing the driver to rest his feet in a free space located in front of his torso rather than on pedals located on either side of the front frame 3.

[0033] In the embodiment of [Fig. 1], the rear frame 5 includes a swing arm 16 configured to receive a powertrain 17 (visible in [Fig. 2]). This powertrain 17 is configured to drive the rear wheels 6. Preferably, the powertrain is electric. In this case, the vehicle 1 includes a battery for powering the powertrain 17 and carried by the support frame 18 of the rear frame 5. This could be, for example, a LiFePO4 battery.

[0034] In addition, the swing arm 16 is preferably arranged at the level of a lower part of the rear frame 5 which makes it possible to give a particularly low center of gravity to the vehicle 1.

[0035] Furthermore, the rear frame 5 may include a support frame 18 linked by a joint 19 to the swing arm 16. Preferably, the joint 19 is arranged between the powertrain 17, in particular an axle 20 of the rear wheels 6, and the pendulum device 7. The support frame 18 is in particular mounted so as to be suspended relative to the swing arm 16, which allows the transmission of shocks to be damped.

[0036] The support frame 18 may include a platform (not shown) configured to receive a load such as a trunk or storage box. By way of non-limiting example, this may be a trunk intended to hold mail. This platform may, for example, be arranged opposite the powertrain 17, above a rear wheel arch 6.

[0037] As shown in [Fig. 1], the rear frame 5 is equipped with a suspension system 21 linked to each rear wheel 6. This is, for example, a suspension system of the pneumatic cylinder and / or spring type. The suspension system 21 is linked on one side to the support frame 18 and on the other side to the swing arm 16, particularly in the vicinity of a drive axle of the rear wheels 6.

[0038] Furthermore, as illustrated in [Fig. 5], the front frame 3 is articulated relative to the rear frame 5 in such a way as to allow the front frame 3 to tilt relative to said rear frame 5 towards the road on either side of a vertical position, as indicated by arrow 22. In other words, the front frame 3 can tilt about an articulation axis 23 (visible in [Fig. 1] and [Fig. 2]) located in a plane containing the vertical and passing through a midpoint of the rear wheels 6. Put another way, while the rear frame 5 remains horizontal, i.e., the two rear wheels 6 remain in contact with the road, the front frame 3 can tilt, under the effect of an impulse given by the driver, to the right or to the left. Such pivoting gives good maneuverability to the vehicle 1, in particular by allowing the driver to turn without having to turn the handlebars 12 or with only a small turn.

[0039] As shown in [Fig. 5], on the left, the front frame 3 tilts to the left, allowing the rider to turn left, and on the right, it tilts to the right, allowing the rider to turn right. Although it is a tricycle, the rider can thus experience sensations similar to riding a two-wheeler. This tilting angle is limited, for example, to 30°.

[0040] In a preferred embodiment shown in [Fig. 1], the vehicle 1 is configured so that the articulation axis 23 is inclined at a strictly positive angle α with respect to the road surface. The articulation axis 23 is therefore not horizontal and rises from the rear to the front of the vehicle 1.

[0041] Preferably, angle a is less than 14°. In a more favorable case, angle a is between 5° and 10°. Angle a may, in particular, be equal to 7°. Such characteristics enhance the good handling of vehicle 1, both in terms of stability and maneuverability.

[0042] In the embodiment of [Fig. 1] and [Fig. 2], the articulation between the front frame 3 and the rear frame 5 is achieved by the pendulum device 7. As shown in more detail in [Fig. 2] and [Fig. 3], the pendulum device 7 comprises a bearing 24 articulated for rotation about a shaft 25. The bearing 24 is connected to the frame front 3 while the shaft 25 is linked to the rear frame 5. The longitudinal axis of the shaft 25 corresponds to the articulation axis 23 of the pendulum device 7 allowing the tilting of the front frame 3.

[0043] More specifically, the bearing 24 is fixed to the frame 9 of the front frame 3. This fixing can be achieved by means of flanges 26 configured to be fixed to a support 27 provided for this purpose on the frame 9 using conventional fasteners such as screws or bolts. In addition, the shaft 25 is connected at one of its ends, referred to as the rear end 28, to the support frame 18 of the rear frame 5. This connection can be achieved by means of one or more keys 29.

[0044] Furthermore, the vehicle 1 may include a torque damper 30 arranged between the bearing 24 and the shaft 25. In the embodiment of [Fig. 1], [Fig. 2], and [Fig. 3], the torque damper 30 is arranged at one end, referred to as the front end 31, of the pendulum device 7, opposite the rear end 28 of the shaft 25. In this embodiment, the torque damper 30 corresponds to a conventional damper comprising a housing provided with a recess in which compressible and preloaded spring-type elements are arranged. This recess is designed to receive one end of the shaft 25 configured to interact with the spring elements of the torque damper 30 so as to dampen the movements between the bearing 24 and the shaft 25.

[0045] Preferably, the axis of the joint 19 between the swing arm 16 and the support frame 18 is substantially orthogonal to the joint axis 23 of the pendulum device 7. Furthermore, the axis of the joint 19 is arranged at the rear end 28 of the shaft 25 so that said axis of the joint 19 passes through the joint axis 23 allowing the tilting of the front frame 3.

[0046] In addition, the rear frame 5 may include a conventional rear wheel braking system 6, in particular a disc braking system.

[0047] Furthermore, as shown in [Fig. 1] and [Fig. 2], the vehicle 1 includes the parking brake system 8 configured to lock or unlock the tilting of the front frame 3 relative to the rear frame 5. More specifically, locking is performed automatically when certain conditions, referred to as locking conditions, are met. Similarly, unlocking is performed automatically when certain conditions, referred to as unlocking conditions, are met.

[0048] In the embodiment of [Fig. 1], [Fig. 2], [Fig. 3], and [Fig. 4], the parking brake system 8 is configured to lock or unlock the bearing 24 in rotation so as to prevent the front frame 3 from tilting. To this end, as shown in [Fig. 2], the parking brake system 8 may include a brake caliper 32 configured to lock or unlock a disc 33 from the bearing 24. The brake caliper 32 includes brake shoes 34 fitted with brake pads 35. The brake caliper 32 is fixed to the rear frame 5 so that the brake shoes 34 are arranged on either side of the disc 33.

[0049] To achieve the locking mechanism, the brake shoes 34 are configured to be brought close to the disc 33 so as to press the brake pads 35 against it. The friction of the brake pads 35 on the disc 3 prevents the disc 33 from rotating and therefore also prevents the bearing 24 from rotating. The locking of the bearing 24 also prevents the front frame 3 from tilting relative to the rear frame 5.

[0050] To achieve the unlocking, the brake shoes 34 are configured so that they can be moved away from the disc 33 to free the latter. With the brake pads 35 no longer in contact with the disc 33, this allows the disc 33 to be rotated free, and therefore the bearing 24 as well. The rotational release of the bearing 24 also releases the tilting mechanism of the front frame 3 relative to the rear frame 5.

[0051] In the particular embodiment of [Fig. 2] and [Fig. 3], the disc 33 extends angularly with respect to the articulation axis 23, around the bearing 24. The disc 33 may be an added part fixed to the bearing 24 by means of conventional fasteners such as screws or bolts. Furthermore, the disc 33 may be in the form of a complete disc or a portion of a disc. Preferably, as shown in [Fig. 3], the disc 33 is a portion of a disc extending over an angle [3] less than or equal to 180°.

[0052] Furthermore, in a particular embodiment shown in [Fig. 2], the parking brake system 8 may include a first master cylinder 36 and an actuator 37. They are both fixed to the rear frame 5. The actuator 37 is configured to be able to control the master cylinder 36 so as to block or unlock the tilting of the front frame 3. Indeed, the master cylinder 36 is configured to be able to move the brake shoes 34 closer to or further away from the brake caliper 32. Thus, depending on the command provided by the actuator 37, the master cylinder 36 presses the brake shoes 34 against the disc 33 or releases said brake shoes 34 so as to respectively block or unlock the disc 33 from rotating.

[0053] Preferably, the actuator 37 is electrical in nature. More particularly, the actuator 37 is preferably a linear actuator. The master cylinder 36, for its part, is preferably a hydraulic component.

[0054] Furthermore, as schematically represented in [Fig. 2], the vehicle 1 includes an electronic control system 38 for activating the parking brake system 8. More specifically, in the particular embodiment above, the control system 38 is configured to activate the actuator 37. For this In doing so, the management system 38 can include one or more standard computing units.

[0055] In another particular embodiment shown schematically in [Fig.4], as a variant of the previous embodiment, the parking brake system 8 includes an electric brake actuator 42 configured to be controlled by the management system 38. According to the control of the management system 38, the electric brake actuator 42 brings the shoes 34 of the disc 33 closer or further apart in order to respectively block or unblock the tilting of the front frame 3. For this purpose, the electric brake actuator 42 may include a conventional electric geared motor unit.

[0056] In a particular, non-limiting embodiment, the parking brake system 8 is configured to implement automatic locking of the tilting of the front frame 3 when the following locking conditions are met: - vehicle 1 has a speed less than or equal to a predetermined speed; and - an absence of the driver on the saddle 41 of the front frame 3 is detected.

[0057] Preferably, the predetermined speed corresponds to a reduced speed close to walking pace, namely a speed close to 4 km / h. For example, the predetermined speed may be equal to 5 km / h.

[0058] In addition, to detect the presence or absence of a driver on the seat 41 of the front frame 3, the vehicle 1 may, for example, include a driver presence or absence detector 43 on said seat 41. This detector 43 may be integrated into the seat 41, as shown schematically in [Fig. 1].

[0059] In this embodiment, the parking brake system 8 is therefore configured to automatically prevent the front frame 3 from tilting when the driver is no longer on the seat 41 of the vehicle 1 and said vehicle 1 is stationary or moving at a reduced speed. In this way, the tilting lock is activated when the driver leaves the vehicle 1 even if the latter is not completely stopped.

[0060] Another blocking condition, in addition to the two blocking conditions mentioned above, may be that the parking brake system 8 is not already activated. Indeed, from a software perspective, it is relevant that the control system 38 be configured so as not to attempt to block the tilting of the front frame 3 if the parking brake 8 is already activated, for example manually as explained below.

[0061] In a particular embodiment shown schematically in [Fig. 1], the vehicle 1 comprises an ignition lock 44 and a drive mode selector 45 of said vehicle 1. The ignition lock 44 is configured to receive a key The ignition switch (not shown) allows the powertrain 17 to be switched on and the vehicle 1 to be started in the usual way. The drive mode selector 45 allows the driver to choose a driving mode from several available modes. The drive mode selector 45 can be in at least two positions: a forward position and a reverse position.

[0062] In this particular embodiment, without limitation, the parking brake system 8 is configured to implement the automatic release of the front frame tilting mechanism 3 when the following release conditions are met: - the ignition key is in a driving position in the ignition lock 44; - the drive mode selector 45 is in a forward or reverse position; and - The presence of the driver on the seat 41 of the front frame 3 is detected by the detector 43. In this way, the parking brake system 8 is configured to automatically unlock the tilting of the front frame 3 when the driver has returned to the vehicle 1 and is ready to leave again.

[0063] Thus, the vehicle 1 equipped with the parking brake system 8 allows the tilting mechanism of the front frame 3 to be locked or unlocked without any additional action being required from the driver. For example, when the driver leaves the seat 41 of the vehicle 1, the parking brake system 8 automatically locks the tilting mechanism. The driver therefore does not have to take any particular action to ensure the stability of the vehicle 1 when stationary. Conversely, when the driver returns to the seat 41 of the vehicle 1, the ignition is switched on, and a driving mode is selected, the parking brake system 8 automatically unlocks the mechanism. The driver therefore does not have to take any particular action to resume driving with the tilting mechanism of the front frame 3 operational.

[0064] This greatly improves the ergonomics of vehicle 1, particularly for delivery vehicle applications. Indeed, the automatic locking and unlocking function provides significant time savings and increased comfort, especially when the driver has to frequently exit vehicle 1. Furthermore, it also eliminates the need for the driver to manage the stability of vehicle 1 each time they stop to exit it.

[0065] In a particular embodiment, the parking brake system 8 is configured to also allow alternative manual locking or unlocking of the front frame 3's tilting mechanism. To this end, as shown in [Fig. 1], the parking brake system 8 may include a second master cylinder 39 configured to be manually operated. As the master- cylinder 36, the master cylinder 39 is also configured to be able to move the jaws 34 of the brake caliper 32 closer to or further from the disc 33 in order to block the bearing 24 and thus the tilting of the front frame 3.

[0066] For example, the master cylinder 39 can be arranged on the front frame 3 near a parking brake handle 40. This handle 40 is connected to the master cylinder 39 so that the master cylinder 39 can be operated manually. The driver can thus decide to lock or unlock the tilting of the front frame 3, for example, while still in the vehicle 1.

[0067] In this embodiment, the brake caliper 32 corresponds to a double-chamber brake caliper. Such a brake caliper 32 has the advantage of being bistable. In this way, the brake caliper 32 can be actuated in two different ways, namely automatically by the master cylinder 36 or manually by the master cylinder 39.

[0068] Furthermore, in a particular embodiment, the parking brake system 8 is configured to alternately block or simultaneously unlock the tilting of the front frame 3 and the forward and / or backward movement of the vehicle 1. In particular, this simultaneous blocking or unlocking is carried out both when the parking brake system 8 is controlled automatically and when it is controlled manually.

[0069] Thus, a single braking system allows both the tilting of the front frame 3 and the movement of the vehicle 1 to be blocked. This allows for increased time savings and comfort since only one action (automatic or manual) is required to perform both blocking or unlocking.

[0070] List of references: 1: vehicle 2: chassis 3: Front frame 4: front wheel 5: rear frame 6: rear wheel 7: Pendulum device 8: Parking brake system 9: frame 10: forward crew 11: Steering fork 12: handlebars 13: front wheel axle 14: Front brake system 15: Front suspension swing arm geared motor group support frame, hinge axis rear axle rear suspension arrow pendulum articulation axis landing TREE bridles support rear end keys torque damper distal end brake caliper disk jaws brake pads first master cylinder actuator management system second master cylinder parking brake handle saddle electric brake actuator detector ignition lock driving mode selector

Claims

Demands

1. A tricycle vehicle comprising a chassis (2) made of at least two parts capable of pivoting relative to each other, said chassis (2) comprising a front frame (3) equipped with a front wheel (4) and configured for the installation of a driver of said tricycle vehicle (1) on a saddle (41), and a rear frame (5) equipped with two rear wheels (6), said front frame (3) being rotationally articulated about an articulation axis (23) relative to the rear frame (5) so as to allow the front frame (3) relative to the rear frame (5) to tilt towards the roadway on either side of a vertical position, characterized in that the tricycle vehicle (1) comprises a parking brake system (8) and a control system (38),said parking brake system (8) being configured to be controlled by the management system (38) so as to alternately automatically block said tilting of the front frame (3) when at least one blocking condition is met or automatically unlock said tilting of the front frame (3) when at least one unlocking condition is met.

2. Tricycle vehicle according to claim 1, characterized in that it comprises a pendulum device (7) including a bearing (24) fixedly connected to the front frame (3) and a shaft (25) fixedly connected to the rear frame (5), said bearing (24) being rotationally articulated about said shaft (25), the longitudinal axis of said shaft (25) corresponding to the articulation axis (23) allowing the tilting of the front frame (3), the parking brake system (8) being configured to alternately lock the bearing (24) in rotation so as to block the tilting of the front frame (3) or unlock the bearing (24) in rotation so as to unlock the tilting of the front frame (3).

3. A tricycle vehicle according to claim 2, characterized in that the parking brake system (8) comprises at least one brake caliper (32) provided with at least one pair of brake shoes (34), said brake caliper (32) being fixed to the rear frame (5), the pendulum device (7) further comprising a disc (33) fixedly connected to the bearing (24), the disc (33) extending angularly and perpendicularly around the bearing (24), said brake caliper (32) being configured to alternately bring the jaws (34) closer to the disc (33) so that said jaws (34) come into contact with said disc (33) in order to block the bearing (24) in rotation or move the jaws (34) away from the disc (33) so that said jaws (34) release said disc (33) in order to unlock the bearing (23) in rotation.

4. Tricycle vehicle according to claim 3, characterized in that the parking brake system (8) comprises at least a first master cylinder (36) and an actuator (37), the management system (38) being configured to control the actuator (37) so that said actuator (37) controls the first master cylinder (36), said first master cylinder (36) being configured to alternately bring the jaws (34) of the brake caliper (32) closer together or further apart when controlled by the actuator (37).

5. Tricycle vehicle according to claim 4, characterized in that the actuator (37) for controlling the first master cylinder (36) corresponds to a linear actuator.

6. Tricycle vehicle according to claim 3, characterized in that the parking brake system (8) comprises at least one electric brake actuator (42), the management system (38) being configured to control the electric brake actuator (42), the electric brake actuator (42) being configured to alternately bring the brake caliper (32) closer together or further apart when controlled by the management system (38).

7. Tricycle vehicle according to any one of the preceding claims, characterized in that the parking brake system (8) includes a second master cylinder (39) configured to be manually actuated so as to alternately block or unblock the tilting of the front frame (3).

8. A tricycle vehicle according to any one of the preceding claims, characterized in that the parking brake system (8) is configured to alternately lock or unlock simultaneously the tilting of the front frame (3) and a forward and / or backward movement of the vehicle (1) tricycle.

9. Tricycle vehicle according to any one of the preceding claims, characterized in that the seat (41) of the front frame (3) has a detector (43) for the presence or absence of the driver on said seat (41), the parking brake system (8) being configured to be controlled by the management system (38) to implement said automatic locking when the following locking conditions are met: - the tricycle vehicle (1) has a speed less than or equal to a predetermined speed; and - an absence of the driver on the seat (41) of the front frame (3) is detected by said detector (43).

10. A tricycle vehicle according to any one of the preceding claims, characterized in that it comprises an ignition lock (44) configured to receive an ignition key and a driving mode selector (45) of the tricycle vehicle (1), the seat of the front frame further comprising a detector (43) for the presence or absence of the driver on said seat (41), the parking brake system (8) being configured to be controlled by the management system (38) to implement said automatic release when the following release conditions are met: - the ignition key is in a driving position in the ignition lock (43); - the driving mode selector (44) is in a forward or reverse position; and - the presence of the driver on the seat (41) of the front frame (3) is detected by said detector (43).

Images