Brake handle structure

Abstract

The utility model relates to a brake handle structure. The brake handle structure comprises a brake handle seat, the brake handle seat is used for being fixedly connected with a handlebar and can rotate around the handlebar to adjust the angle, the brake handle seat is provided with an oil cylinder and a hydraulic cylinder, the oil cylinder is arranged above the hydraulic cylinder and communicated with the hydraulic cylinder through a vertical hole, and the length direction of the oil cylinder is perpendicular to a middle shaft, rotating around the handlebar, of the brake handle seat; in the length direction of the oil cylinder, a first inner wall and a second inner wall which are opposite to each other are arranged in the oil cylinder, and the distance between the first inner wall and the brake handle seat rotating middle shaft is smaller than that between the second inner wall and the brake handle seat rotating middle shaft; the distance between the vertical hole opening and the second inner wall is smaller than the distance between the vertical hole and the first inner wall. When the brake handle structure inclines downwards, the opening of the vertical hole is located at the lower position in the oil cylinder, even if hydraulic oil in the oil cylinder is relatively little, the opening of the vertical hole can be covered with the hydraulic oil, the situation that air enters the hydraulic cylinder is difficult to occur, and therefore the air inlet probability of the hydraulic cylinder is reduced.

Description

Technical Field

[0001] The present application relates to bicycle accessories, and more particularly to a brake handle structure. Background Art

[0002] Bicycles are common vehicles. A brake handle structure is fixed to the handlebars of a bicycle. The brake handle structure usually has a cable-operated brake handle or a hydraulic brake handle. The principle of the hydraulic brake handle is that the handle pushes the piston to move horizontally in the hydraulic cylinder, and the piston pushes the hydraulic oil so that the brake caliper at the end clamps the brake disc to achieve braking. In the hydraulic brake handle structure, an oil cylinder is provided above the hydraulic cylinder. The oil cylinder is used to store hydraulic oil. The oil cylinder and the hydraulic cylinder are connected through a vertical hole. Usually, the length direction of the oil cylinder is parallel to the axial direction of the hydraulic cylinder. The vertical hole is provided in the middle position of the bottom surface of the oil cylinder. When the brake handle structure is tilted downward, if there is less hydraulic oil in the oil cylinder, it is easy for the vertical hole opening to not be covered by hydraulic oil, allowing air to enter the hydraulic cylinder, which ultimately leads to poor braking effect. This needs to be improved. Utility Model Content

[0003] The purpose of this application is to overcome the above-mentioned deficiencies in the prior art and to provide a brake handle structure to reduce the probability of air intake into the hydraulic cylinder.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: a brake handle structure, the brake handle structure includes a brake handle seat, the brake handle seat is used to be fixedly connected to the handlebar and can be rotated around the handlebar to adjust the angle, the brake handle seat is provided with an oil cylinder and a hydraulic cylinder, the oil cylinder is arranged above the hydraulic cylinder and the oil cylinder and the hydraulic cylinder are connected through a vertical hole, the length direction of the oil cylinder is perpendicular to the central axis of the rotation of the brake handle seat around the handlebar; in the length direction of the oil cylinder, the inside of the oil cylinder is provided with a first inner wall and a second inner wall relative to each other, the distance between the first inner wall and the central axis of rotation of the brake handle seat is smaller than the distance between the second inner wall and the central axis of rotation of the brake handle seat; the vertical hole opening is provided on the bottom surface of the oil cylinder and the distance between the vertical hole opening and the second inner wall is smaller than the distance between the vertical hole and the first inner wall.

[0005] In an optional solution, the brake handle seat is further provided with a clamping cylinder for fixing and clamping the handlebar, and the central axis about which the brake handle seat rotates around the handlebar is the central axis of the clamping cylinder.

[0006] In an optional solution, a step is provided on the other side of the bottom surface of the oil cylinder opposite to the vertical hole. The step is surrounded by the first inner wall and two adjacent inner walls, and the height of the bottom surface where the vertical hole is located is lower than the top surface height of the step.

[0007] In an optional scheme, a cylinder cover and an oil pressure pad are fixed at the opening of the cylinder, and the oil pressure pad is pressed by the cylinder cover and the cylinder opening. An annular sealing protrusion is provided on the side of the oil pressure pad facing the cylinder opening, and an annular sealing groove is provided on the surrounding surface of the cylinder opening. The annular sealing protrusion is placed correspondingly in the annular sealing groove.

[0008] In an optional solution, the oil pressure pad is provided with a U-shaped protrusion protruding toward the oil cylinder, the U-shaped protrusion is placed in the oil cylinder, and the cylinder head is provided with a U-shaped frame facing the oil pressure pad, and the U-shaped frame is correspondingly inserted into the U-shaped protrusion.

[0009] In an optional solution, the oil pressure pad is provided with a long strip protrusion in the middle of the U-shaped protrusion.

[0010] In an optional solution, a piston rod is provided in the hydraulic cylinder, and the brake handle structure further includes a handle for pushing the piston rod to move in the hydraulic cylinder, and the handle is hinged to the brake handle seat through a pin shaft.

[0011] In an optional solution, a pushing block is further provided between the handle and the brake lever seat, and the handle, pushing block and brake lever seat are hinged by the same pin shaft; the pushing block is provided with a front arm, a rear arm and a lower arm for pushing the piston rod in the hydraulic cylinder, and the front arm is threadedly connected to a first screw for adjusting the brake idle stroke, and the tail end of the first screw abuts against the outer wall of the hydraulic cylinder; the handle is threadedly connected to a second screw for adjusting the grip distance, and the tail end of the second screw abuts against the rear arm of the pushing block.

[0012] In an optional solution, a first thimble is provided in the forearm wall, and a second thimble is provided in the handle wall. The first and second thimbles are located between the first and second screws and are coaxial with each other. The outer end of the first thimble presses tightly against the outer threads of the first screw, while the outer end of the second thimble presses tightly against the outer threads of the second screw. A compression spring is sandwiched between the distal ends of the first and second thimbles.

[0013] In an optional solution, the outer end of the piston rod is fixed with a T-shaped nail through a threaded connection, the lower arm is hinged to at least one roller, and the lower arm presses against the outer end surface of the T-shaped nail through the roller.

[0014] In an alternative solution, the piston rod is made of sapphire and the brake lever holder is made of aluminum.

[0015] The technical solution of the present application arranges the vertical hole connecting the oil cylinder and the hydraulic cylinder on a side away from the rotation axis of the brake handle seat. Therefore, when the brake handle structure is tilted downward, the opening of the vertical hole is at a lower position in the oil cylinder. Even if there is relatively little hydraulic oil in the oil cylinder, the vertical hole opening can be covered by the hydraulic oil, and it is difficult for the hydraulic cylinder to take in air. Therefore, the probability of air taking in the hydraulic cylinder is reduced, and the stability of the braking effect is improved.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a three-dimensional diagram of the brake handle structure assembly of this application.

[0018] Figure 2 This is an exploded view of the brake handle structure of this application.

[0019] Figure 3 This is a cross-sectional view of the brake handle structure of this application.

[0020] Figure 4 This is an exploded view of the brake handle structure of this application.

[0021] Figure 5 This is a cross-sectional view of the brake handle structure of this application.

[0022] It should be noted that the products shown in the above views have been appropriately reduced / enlarged to suit the size of the drawings and for clarity of the views, and there is no restriction on the size of the products shown in the views. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of this application more clear, this application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0025] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] The embodiment of the present application is a brake handle structure, and its specific structure is as follows Figure 1-5 shown.

[0027] like Figure 1 The brake handle structure shown is fixedly mounted on a handlebar 10 , which can be a handlebar 10 of a bicycle, electric vehicle, tricycle or scooter, etc., that is, the brake handle structure of the embodiment can be applied to bicycles, electric vehicles, tricycles or scooters, etc.

[0028] Combine Figure 1 and Figure 2As shown, the brake handle structure includes a brake handle base 20, which is used to be fixedly connected to the handlebar 10 and can rotate around the handlebar 10 to adjust the angle. When braking, the brake handle base 20 is subjected to a large external force, so the brake handle base 20 can be made of aluminum to ensure sufficient strength. Figure 2 As shown, the brake handle base 20 is provided with a cylinder 30 and a hydraulic cylinder 40. The cylinder 30 is positioned above the hydraulic cylinder 40 and is connected to the hydraulic cylinder 40 via a vertical hole 32, typically two of which are provided. The longitudinal direction A of the cylinder 30 is perpendicular to the central axis 201 about which the brake handle base 20 rotates about the handlebar 10. Along the longitudinal direction of the cylinder 30, the cylinder 30 is provided with a first inner wall 33 and a second inner wall 34 opposing each other. The distance between the first inner wall 33 and the central axis 201 of rotation of the brake handle base 20 is less than the distance between the second inner wall 34 and the central axis 201 of rotation of the brake handle base 20. The vertical hole 32 opens at the bottom surface 31 of the cylinder 30, and the distance between the opening of the vertical hole 32 and the second inner wall 34 is less than the distance between the vertical hole 32 and the first inner wall 33. It can be seen that the brake handle structure of the embodiment arranges the vertical hole 32 connecting the oil cylinder 30 and the hydraulic cylinder 40 on the side away from the rotation axis 201 of the brake handle seat 20. Therefore, when the brake handle structure rotates around the handlebar 10 and tilts downward, the opening of the vertical hole 32 is at a lower position in the oil cylinder 30. Even if there is relatively little hydraulic oil in the oil cylinder 30, the opening of the vertical hole 32 can be covered by the hydraulic oil, and it is difficult for the hydraulic cylinder 40 to take in air. Therefore, the probability of air taking in the hydraulic cylinder 40 is reduced, and the stability of the braking effect is improved.

[0029] In some embodiments, combined Figure 1 and Figure 2 As shown, the brake handle mount 20 is further provided with a clamping sleeve 21 for securing and clamping the handlebar 10. The central axis 201, around which the brake handle mount 20 rotates about the handlebar 10, serves as the central axis of the clamping sleeve 21. Loosening the outer screw 211 expands the inner diameter of the clamping sleeve 21, allowing the brake handle mount 20 to be removed from the handlebar 10. Tightening the outer screw 211 secures the brake handle mount 20 to the handlebar 10.

[0030] In some embodiments, combined Figure 2 and Figure 3 As shown, a step 35 is provided on the other side of the bottom surface 31 of the oil cylinder 30 opposite to the vertical hole 32. The step 35 is surrounded by the first inner wall 33 and the two adjacent inner walls. In addition, the height of the bottom surface 31 where the vertical hole 32 opens is lower than the height of the top surface of the step 35. Therefore, when the brake handle structure rotates around the handlebar 10 and tilts downward, the hydraulic oil above the step 35 will also flow into the position above the opening of the vertical hole 32, further reducing the probability of air intake into the hydraulic cylinder 40.

[0031] In some embodiments, combined Figures 2 to 4As shown, a cylinder head 36 and an oil pressure pad 37 are fixed to the opening of the oil cylinder 30. The cylinder head 36 is fixed to the oil cylinder 30 by two screws 361. The oil pressure pad 37 is pressed up and down by the cylinder head 36 and the opening of the oil cylinder 30. The oil pressure pad 37 has an annular sealing protrusion 371 on the side facing the opening of the oil cylinder 30. The surface surrounding the opening of the oil cylinder 30 is provided with an annular sealing groove 301. The annular sealing protrusion 371 is correspondingly seated in the annular sealing groove 301, thereby improving the seal between the cylinder head 36 and the oil cylinder 30.

[0032] In some embodiments, as Figure 4 As shown, the oil pressure pad 37 has a U-shaped protrusion 372 protruding toward the oil cylinder 30, and the U-shaped protrusion 372 is inserted into the oil cylinder 30. The cylinder head 36 has a U-shaped frame 362 facing the oil pressure pad 37, and the U-shaped frame 362 is correspondingly inserted into the U-shaped protrusion 372. In addition, the oil pressure pad 37 has a long strip protrusion 373 in the middle of the U-shaped protrusion 372.

[0033] In some embodiments, as Figure 5 As shown, a linearly reciprocating piston rod 50 is disposed within the hydraulic cylinder 40. The piston rod 50 is made of polyimide (POM), and the brake handle holder 20 is made of aluminum. This prevents the piston rod 50 from scratching the inner wall of the hydraulic cylinder 40 during movement. The brake handle structure also includes a handle 60 for moving the piston rod 50 within the hydraulic cylinder 40. The handle 60 is hingedly connected to the brake handle holder 20 via a pin 23. The handle 60 can be made of steel.

[0034] In some embodiments, as Figure 5 As shown, a push block 70 is provided between the handle 60 and the brake lever base 20. The handle 60, push block 70, and brake lever base 20 are articulated via a common pin 23. The push block 70 comprises a front arm 71, a rear arm 72, and a lower arm 73 for pushing the piston rod 50 within the hydraulic cylinder 40. The front arm 71 is threadedly connected to a first screw 81 for adjusting the brake stroke. The tail end of the first screw 81 abuts against the outer wall of the hydraulic cylinder 40. Clockwise screwing in the first screw 81 reduces the brake stroke, while counterclockwise screwing in increases it. The handle 60 is threadedly connected to a second screw 82 for adjusting the grip distance. The tail end of the second screw 82 abuts against the rear arm 72 of the push block 70. Clockwise screwing in the second screw 82 increases the grip distance, while counterclockwise screwing in the second screw 82 decreases it.

[0035] In some embodiments, as Figure 5 As shown, the outer end of the piston rod 50 is fixed to a T-shaped nail 51 via a threaded connection. The lower arm 73 is hinged to at least one roller 74. The lower arm 73 presses against the outer end surface of the T-shaped nail 51 through the roller 74, thereby pushing the piston rod 50 to move within the hydraulic cylinder 40. The T-shaped nail 51 is made of stainless steel to ensure sufficient working strength and wear resistance.

[0036] In some embodiments, as Figure 5 As shown, a first thimble 83 is provided within the wall of the forearm 71, and a second thimble 84 is provided within the wall of the handle 60. The first and second thimbles 83, 84 are located between the first and second screws 81, 82, and are coaxial with each other. The axes of the first and second thimbles 83, 84 are not perpendicular to the axes of the first and second screws 81, 82. The outer end of the first thimble 83 presses against the external threads of the first screw 81, while the outer end of the second thimble 84 presses against the external threads of the second screw 82. A compression spring 85 is sandwiched between the ends of the first and second thimbles 83, 84. When first screw 81 rotates clockwise or counterclockwise, the outer end of first thimble 83 abuts against the outer thread of first screw 81, and first thimble 83 is squeezed by compression spring 85, causing first thimble 83 to move back and forth axially. Therefore, during the rotation of first screw 81, a collision sound is produced with first thimble 83, and the force applied to operate first screw 81 also varies slightly, that is, there is a sense of stuck. In addition, when first screw 81 stops rotating, first thimble 83 is pressed against first screw 81 by the force of compression spring 85, which can increase the friction on first screw 81. When the bicycle encounters bumps, first screw 81 will not easily loosen, and the braking feel will not be easily changed. Based on the same principle, second thimble 84 and compression spring 85 can also produce the same effect on second screw 82.

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0039] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0040] The above examples are merely used to further illustrate the technical content of this application to facilitate understanding by the reader, but do not limit the implementation of this application to these examples. Any technical extension or re-creation based on this application is protected by this application. The scope of protection of this application shall be based on the claims.

Claims

1. A brake handle structure, comprising a brake handle seat, the brake handle seat being used to be fixedly connected to the handlebar and rotatable around the handlebar to adjust the angle, the brake handle seat being provided with an oil cylinder and a hydraulic cylinder, the oil cylinder being arranged above the hydraulic cylinder and the oil cylinder and the hydraulic cylinder being connected through a vertical hole, characterized in that: The length direction of the cylinder is perpendicular to the central axis of rotation of the brake handle seat around the handlebar; in the length direction of the cylinder, the inside of the cylinder is provided with a first inner wall and a second inner wall opposite to each other, and the distance between the first inner wall and the central axis of rotation of the brake handle seat is smaller than the distance between the second inner wall and the central axis of rotation of the brake handle seat; the vertical hole opening is provided on the bottom surface of the cylinder and the distance between the vertical hole opening and the second inner wall is smaller than the distance between the vertical hole and the first inner wall.

2. The brake handle structure according to claim 1, characterized in that: A step is provided on the other side of the bottom surface of the oil cylinder opposite to the vertical hole. The step is surrounded between the first inner wall and two adjacent inner walls. The height of the bottom surface where the vertical hole is located is lower than the height of the top surface of the step.

3. The brake handle structure according to claim 1, wherein: A cylinder cover and an oil pressure pad are fixed at the opening of the oil cylinder. The oil pressure pad is pressed by the cylinder cover and the oil cylinder opening. An annular sealing protrusion is provided on the side of the oil pressure pad facing the oil cylinder opening. An annular sealing groove is provided on the surrounding surface of the oil cylinder opening. The annular sealing protrusion is correspondingly placed in the annular sealing groove.

4. The brake handle structure according to claim 3, characterized in that: The oil pressure pad is provided with a U-shaped protrusion protruding toward the oil cylinder, and the U-shaped protrusion is placed in the oil cylinder. The cylinder cover is provided with a U-shaped frame facing the oil pressure pad, and the U-shaped frame is correspondingly inserted into the U-shaped protrusion.

5. The brake handle structure according to claim 4, characterized in that: The oil pressure pad is provided with a long strip protrusion in the middle of the U-shaped protrusion.

6. The brake handle structure according to any one of claims 1 to 5, characterized in that: A piston rod is provided in the hydraulic cylinder, and the brake handle structure further comprises a handle for pushing the piston rod to move in the hydraulic cylinder, and the handle is hinged to the brake handle seat via a pin shaft.

7. The brake handle structure according to claim 6, wherein: A pushing block is also provided between the handle and the brake handle seat, and the handle, pushing block and brake handle seat are hinged by the same pin shaft; the pushing block is provided with a front arm, a rear arm and a lower arm for pushing the piston rod in the hydraulic cylinder, and the front arm is threadedly connected to a first screw for adjusting the brake idle stroke, and the tail end of the first screw abuts against the outer wall of the hydraulic cylinder; the handle is threadedly connected to a second screw for adjusting the grip distance, and the tail end of the second screw abuts against the rear arm of the pushing block.

8. The brake handle structure according to claim 7, wherein: The outer end of the piston rod is fixed with a T-shaped nail through a threaded connection, and the lower arm is hinged to at least one roller, and the lower arm presses against the outer end surface of the T-shaped nail through the roller.

9. The brake handle structure according to claim 7, wherein: A first thimble is provided in the forearm wall, and a second thimble is provided in the handle wall. The first thimble and the second thimble are located between the first screw and the second screw, and the first thimble and the second thimble are coaxial; the outer end of the first thimble is tightly pressed against the external thread of the first screw, and the outer end of the second thimble is tightly pressed against the external thread of the second screw, and a compression spring is clamped between the ends of the first thimble and the second thimble.

10. The brake handle structure according to claim 6, wherein: The piston rod is made of sapphire steel, and the brake handle seat is made of aluminum.

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