Hydraulic two-wheeled vehicle brakes

Abstract

The present invention relates to a hydraulic two-wheeled vehicle brake, wherein the cylinder is an annular cylinder (6) or a partial annular cylinder fixed on the handle (1), the piston is designed as an annular piston (7) or a partial annular piston, which can be connected to a sleeve (4) that can move longitudinally on the handle (1) via a piston rod (8), the transmission mechanism is a spindle transmission mechanism, wherein the sleeve (4) has an outer spindle thread (5) that engages with the inner spindle thread (3) of the rotating handle (2).

Description

[0001] This invention relates to a hydraulic two-wheeled vehicle brake, particularly for bicycles, mopeds, pedestrian vehicles, etc., wherein, in order to induce the braking process, a piston is subjected to a load in a cylinder filled with hydraulic fluid to displace the fluid from the cylinder.

[0002] Such hydraulic two-wheeled vehicle brakes are known.

[0003] Therefore, DE102012008167B4 describes a bicycle brake in which a manually operable, rotatable handle mounted on and about the handlebar is connected to a brake acting on a wheel, wherein the brake can be operated when the handle is rotated about the handlebar as an axis of rotation, wherein the handle is inserted into or nested in a housing fixed to the handlebar on one side in a circumferential direction, a hydraulic annular cylinder section for annular motion is disposed in and connected to the housing, its piston is connected to or can be connected to the handle, and the outlet of the hydraulic annular cylinder section is connected to the brake via a hydraulic line.

[0004] The invention is improved by DE102018006685B3 in that the piston adjustment is accomplished by a bent lever or button.

[0005] The brake according to DE4400641A1 is also operated by a button, which is mechanically pressed with the thumb to direct hydraulic fluid from the cylinder to the brake. The hydraulic cylinder is at least partially located in the handle and is not designed as an annular cylinder.

[0006] DE202010016054U1 discloses an actuation device for a brake caliper, comprising an actuator and a hydraulic cylinder together with a volume displacement member displaceable therein, wherein the actuation device is connectable to the brake caliper via a hydraulic line, wherein the actuator is rotatably arranged about the longitudinal axis of the hydraulic cylinder, and wherein a transmission mechanism is provided to convert the rotational motion of the actuator into the axial motion of the volume displacement member.

[0007] Three threaded parts are used here: one threaded part connects to the actuator, and the other has a threaded part on the piston and a threaded part inside the cylinder.

[0008] It should be clearly pointed out that the partial integration of the piston-cylinder unit into the handle is technically complex. This results in a rather large longitudinal housing on the handle, which must be compensated for on the other side.

[0009] The objective of this invention is to propose a hydraulic braking system that can be optimally combined with a steering rod.

[0010] In a hydraulic two-wheeled vehicle brake, the rotation of a rotary handle on the handlebar causes a piston to move longitudinally within a cylinder connected to the handlebar, thereby allowing hydraulic fluid to be delivered from the cylinder to the wheel brake during braking. The movement of the piston is achieved through a transmission mechanism that converts rotational motion into axial motion. The present invention proposes that the cylinder is an annular or partially annular cylinder fixed to the handlebar, and the piston is designed as an annular or partially annular piston, which is connected via a piston rod to a sleeve that is longitudinally movable on the handlebar. The transmission mechanism is a spindle drive mechanism, wherein the sleeve has an external spindle thread that engages with the internal spindle thread of the rotary handle.

[0011] An annular cylinder means that the cross-section of the cylinder is formed by the entire ring, while in the case of a partially annular cylinder, the cross-section is formed only by annular segments.

[0012] Hydraulic two-wheeled vehicle brakes are characterized by their simple structure, easily installed by mounting the brake as a single assembly onto the handlebars and securing it. There's no need to replace the handlebars, thus maintaining stability. Due to the threaded spindle, only the rotating handle has a slightly larger diameter.

[0013] In this embodiment, the piston rod is preferably composed of a cylinder with a closed cylinder liner or a strut connected to the head side and the end side.

[0014] In a simplified embodiment of the hydraulic two-wheeled vehicle brake, the rotational movement of a rotary handle on the handle causes a piston to move longitudinally within a cylinder connected to the handle, thereby delivering hydraulic fluid from the cylinder to the wheel brake for braking. The piston movement is achieved by a transmission mechanism that converts rotational motion into axial motion. Hereinafter, the cylinder is defined as an annular or partially annular cylinder fixed to the handle, and the piston is designed as an annular or partially annular piston with a section extending from the annular or partially annular cylinder or having a cylindrical piston rod, wherein the section or piston rod has an internal spindle thread that engages with the internal spindle thread of the rotary handle and forms the external spindle thread of the transmission mechanism.

[0015] In a preferred embodiment, the internal spindle thread of the rotary handle occupies the entire length of the rotary handle. Therefore, the rotary handle is stably installed along its entire length.

[0016] In an advantageous embodiment, the annular cylinder or a portion of the annular cylinder has at least a partial compensation container on the outer side for hydraulic fluid, which communicates with the interior of the cylinder.

[0017] In the case of a partial annular cylinder, the compensation container is preferably placed in an unoccupied space. A helical spring for returning the piston to its original position when the brake is released is disposed, in a known manner, between the annular piston or a portion of the annular piston and the end wall of the annular cylinder.

[0018] The present invention also proposes a hydraulic two-wheeled vehicle brake, wherein the rotational movement of a rotary handle on a handle enables a piston to move longitudinally in a cylinder connected to the handle, thereby delivering hydraulic fluid from the cylinder to the wheel brake for braking. The piston movement is achieved by a transmission mechanism that converts rotational movement into axial movement. Here, one or more cylinders are fixed around the handle, each with a piston rod connected to a sleeve disposed on the handle and movable longitudinally in the cylinder. The sleeve has an external spindle thread that engages with an internal spindle thread on the rotary handle and thus forms the external spindle thread of the transmission mechanism.

[0019] In principle, this type of two-wheeled vehicle brake works with a piston-cylinder unit. However, using multiple piston-cylinder units is more advantageous in terms of the circumferential extension of the steering rod associated with the aforementioned arrangement and the supply of the required amount of hydraulic fluid. With multiple cylinders, they can be arranged symmetrically around the handlebars, reducing their external dimensions. The sleeve that converts the rotational force of the handlebars into longitudinal motion also distributes the load more evenly in this way.

[0020] In an advantageous design of this embodiment, the piston is connected to its respective piston rod and / or the respective piston rod is connected to the sleeve in a hinged manner. In this way, the connection between the spindle thread and the piston has small clearance, thus avoiding point loads.

[0021] At the appropriate rotary handle length, the entire force coupling mechanism (including the cylinder) can be covered by the rotary handle.

[0022] An advantageous design in all three embodiments specifies that the rotary handle has a locking device, which preferably has two set states: the brake is engaged in the braking state, and the brake is engaged in the released state.

[0023] The first setting is for theft prevention, and the second setting should be interesting for mountain bike enthusiasts.

[0024] This invention should be described in conjunction with the figures, wherein:

[0025] Figure 1 A handle with an annular cylinder is shown; and

[0026] Figure 2 The handle with an outer cylinder is shown.

[0027] Figure 1 The handlebar 1, equipped with a two-wheeled vehicle brake, is shown. The rotating handle 2 on the handlebar 1 has an internal spindle thread 3 that engages with an external spindle thread 5.

[0028] The external spindle thread 5 is a component of the sleeve 4, and it is slidably mounted on the handle 1.

[0029] By rotating the rotary handle 2, the rotational motion is converted into the axial motion of the sleeve 4 through the main shaft transmission mechanism.

[0030] Sleeve 4 has a guide mechanism that excludes rotational motion and allows only axial motion. The guide mechanism can be fixed to handle 1 as a separate component or fixed by connection with an annular cylinder 6.

[0031] The piston rod 8 is connected to the sleeve 4 and transmits the axial movement of the sleeve 4 to the annular piston 7 housed in the annular cylinder 6. Hydraulic fluid is discharged from the annular cylinder 6 by the piston movement and reaches the brakes on the respective wheels through the inlet line 11.

[0032] The compensation container 10, which contains hydraulic fluid, ensures that no negative pressure is formed after the annular piston 7 due to the displacement of hydraulic fluid during braking.

[0033] When braking, the coil spring 9 is compressed and relaxes, for example, when the rotary handle 2 is released and the annular piston 7 is returned to its rest position.

[0034] Here, hydraulic fluid is simultaneously returned from the compensation container.

[0035] The complete two-wheeled vehicle brake is designed to be mounted on and secured to the handlebars 1. Only the inlet line 11 needs to be connected.

[0036] In an embodiment according to a third aspect of the invention, the sleeve is omitted. Instead, the external spindle thread 5 is formed on the annular piston 7 or a portion of the annular piston protruding from the annular cylinder 6 or a portion of the annular cylinder, or on the cylindrical piston rod 8.

[0037] Figure 2 The principle of an embodiment of a two-wheeled vehicle brake is shown, wherein cylinder 12 is externally disposed around handlebar 1.

[0038] Cylinder 12 is properly secured to handlebar 1. Since the two-wheeled vehicle brake should also be used as a modification, it is recommended that cylinder 12 be positioned on bushing 14 fitted onto handlebar 1, and then bushing 14 be connected to handlebar 1.

[0039] The diagram shows four cylinders 12, each with a piston 13. This is arranged symmetrically around the handle 1, thereby minimizing the external dimensions and allowing the rotating handle 2 to easily grip the cylinder.

[0040] To enable the piston 13 to move, its piston rod 8 is arranged such that a sleeve 4 can move longitudinally on the steering rod 1, wherein the sleeve 4 has an external spindle thread 5 that engages with the internal spindle thread of the rotating handle 2. This corresponds to Figure 1 The operating mode shown is therefore not repeated here.

[0041] Since the respective piston rods 8 of cylinder 12 can have a greater distance from the handle 1 than the connection between the piston rod 8 and the sleeve 4, i.e., the piston rod 8 extends at an angle relative to the handle 1, it is advantageously designed that the connection between the piston 13 and the respective piston rod 8 and / or the connection between the respective piston rod 8 and the sleeve 4 is achieved by hinge.

[0042] During braking, the hydraulic fluid forced out from the individual cylinder 12 is collected through a valve and then delivered to the wheel brakes in a known manner. When braking is interrupted, i.e., when the main shaft drive mechanism reverses, a return spring in each cylinder 12 for its respective piston 13 supports the return flow.

[0043] The proposed solution is technically straightforward to implement, highly reliable, and suitable for retrofitting. All that's required is to consider the different types of handlebars from various two-wheeler manufacturers, including rotating handles with internal spindle threads.

[0044] List of reference numerals

[0045] 1 Handle

[0046] 2. Rotate the handle

[0047] 3. Internal spindle thread of the rotary handle

[0048] 4 sleeves

[0049] 5. External spindle thread of the sleeve

[0050] 6. Ring cylinder

[0051] 7. Annular piston

[0052] 8 Piston rod

[0053] 9. Coil springs

[0054] 10 Compensation Container

[0055] 11 Inlet Pipeline

[0056] 12 cylinders

[0057] 13 Pistons

[0058] 14 Bushing

Claims

1. A hydraulic two-wheeled vehicle brake, wherein, The rotation of the handle on the handle enables the piston to move longitudinally in a cylinder connected to the handle, thereby allowing hydraulic fluid to be delivered from the cylinder to the wheel brake during braking. The movement of the piston is achieved by a transmission mechanism that converts rotational motion into axial motion. The cylinder is an annular cylinder (6) or a partially annular cylinder fixed to the handle (1), and the piston is designed as an annular piston (7) or a partially annular piston. The piston is connected via a piston rod (8) to a sleeve (4) that can move longitudinally on the handle (1). The transmission mechanism is a spindle drive mechanism, wherein the sleeve (4) has an external spindle thread (5) that engages with the internal spindle thread (3) of the rotating handle (2).

2. The hydraulic two-wheeled vehicle brake according to claim 1, characterized in that, The piston rod (8) is composed of a cylinder with a closed cylinder liner or a strut connected at the head and end sides.

3. A hydraulic two-wheeled vehicle brake, wherein, The rotation of the handle on the rotary lever causes the piston to move longitudinally in a cylinder connected to the handle, thereby delivering hydraulic fluid from the cylinder to the wheel brake for braking. The movement of the piston is achieved by a transmission mechanism that converts rotational movement into axial movement. The cylinder is an annular cylinder (6) or a partially annular cylinder fixed to the handle (1), and the piston is designed as an annular piston (7) or a partially annular piston. The piston extends from the annular cylinder (6) or the partially annular cylinder in a section or has a cylindrical piston rod (8), wherein the section or the piston rod (8) has an inner spindle thread (3) that engages with the rotary handle and forms an outer spindle thread (5) of the transmission mechanism.

4. The hydraulic two-wheeled vehicle brake according to any one of claims 1 to 3, characterized in that, The annular cylinder (6) or the portion of the annular cylinder has at least a compensation container (10) on its outer side, the compensation container (10) being connected to the interior of the annular cylinder (6) or the portion of the annular cylinder.

5. The hydraulic two-wheeled vehicle brake according to claim 4, characterized in that, In the case of a partial annular cylinder, the compensation container (10) is disposed in an unoccupied space opposite to the partial annular cylinder.

6. The hydraulic two-wheeled vehicle brake according to claim 1, characterized in that, A helical spring (9) is provided between the annular piston (7) or the portion of the annular piston and the end wall of the annular cylinder (6) or the portion of the annular cylinder for resetting the annular piston (7) when the brake is released.

7. The hydraulic two-wheeled vehicle brake according to claim 1, characterized in that, The internal spindle thread (3) of the rotary handle (2) occupies the entire length of the rotary handle (2).

8. The hydraulic two-wheeled vehicle brake according to claim 1, characterized in that, The rotary handle (2) has a locking device.

9. The hydraulic two-wheeled vehicle brake according to claim 8, characterized in that, The locking device has two preset states: the brake is locked in the braking state and the brake is locked in the released state.

10. A hydraulic two-wheeled vehicle brake, wherein, The rotation of the handle on the handle enables the piston to move longitudinally in a cylinder connected to the handle, thereby delivering hydraulic fluid from the cylinder to the wheel brake for braking. The movement of the piston is achieved by a transmission mechanism that converts rotational motion into axial motion. The cylinder is characterized by having one or more cylinders (12) fixed around the handle (1), each of which has a piston (13) with a piston rod (8). The piston rod (8) is connected to a sleeve (4) disposed on the handle and movable longitudinally in the cylinder. The sleeve (4) has an external spindle thread (5) that engages with an internal spindle thread (3) on the handle (2) and thus forms the transmission mechanism.

11. The hydraulic two-wheeled vehicle brake according to claim 10, characterized in that, In the case of multiple cylinders (12), these cylinders are arranged symmetrically around the handle.

12. The hydraulic two-wheeled vehicle brake according to claim 10 or 11, characterized in that, The connection between the piston (13) and its respective piston rod (8) and / or the connection between the respective piston rod (8) and the sleeve (4) is made in a hinged manner.

13. The hydraulic two-wheeled vehicle brake according to claim 10, characterized in that, The rotary handle (2) has a locking device.

14. The hydraulic two-wheeled vehicle brake according to claim 13, characterized in that, The locking device has two preset states: the brake is locked in the braking state and the brake is locked in the released state.

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