Hydraulic brake handle structure

Abstract

The utility model relates to a hydraulic brake handle structure. The hydraulic brake handle structure comprises a brake handle seat, a handle, a screw rod and a nut column, the handle is hinged to the brake handle seat, a piston is arranged in an oil cylinder of the brake handle seat, the inner end of the screw rod is arranged in a groove in the outer end face of the piston, the screw rod is in threaded connection with a screw hole of the nut column, the nut column penetrates into a sleeve, and the nut column and the sleeve are in rotary connection with the handle. The sleeve is provided with a first hole, the first hole and the screw hole of the nut column are coaxial, the first hole is formed in the side, facing the outer end of the screw, of the screw hole, the screw penetrates through the screw hole and the first hole, and the inner diameter of the first hole is larger than the small diameter of external threads of the screw and smaller than the large diameter of the external threads of the screw. According to the technical scheme, in the running process of the bicycle, the threaded connection of the screw rod and the nut column cannot be reversely rotated due to vibration, meanwhile, the rotating resistance of the screw rod is small, a user can directly and manually rotate the screw rod for adjustment, use convenience is guaranteed, and user requirements are met.

Description

TECHNICAL FIELD

[0001] The present application relates to a bicycle accessory, more particularly to a hydraulic brake lever structure. BACKGROUND

[0002] Bicycle is a common vehicle for transportation. Brake lever structure is fixed on the handlebar of bicycle. Brake lever structure usually has pull cable brake lever or hydraulic brake lever. The principle of hydraulic brake lever is that the handle pushes the piston to translate in the hydraulic cylinder, the piston pushes the hydraulic oil to make the brake caliper at the end clamp the brake disc to realize braking. The handle of some hydraulic brake levers directly pushes the piston to linearly move through a screw rod. The handle and the screw rod are connected through a nut, the screw rod penetrates the nut and is threadedly connected with the nut, the nut is arranged in the handle and can rotate about the axis thereof, a knob is fixed to the outer end of the screw rod, and a ball head at the inner end of the screw rod is arranged in a groove on the end surface of the piston. During the driving of the bicycle, the screw thread connection between the screw rod and the nut may be reversed due to the bumping and vibration, which may cause the brake free travel to be larger. Usually, thread locking glue is applied to the outer thread of the screw rod to avoid the reverse rotation of the screw rod, but the resistance of the screw rod to the forward / reverse rotation is increased after the thread locking glue is applied, and the user needs to use a wrench to rotate the screw rod for adjustment, which is not good in use convenience. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to overcome the above deficiencies of the prior art, and provide a hydraulic brake lever structure which can ensure the use convenience and avoid the reverse rotation of the screw rod due to the vibration.

[0004] To achieve the above object, the present application adopts the following technical scheme: a hydraulic brake lever structure, comprising a brake lever seat, a handle, a screw rod and a nut column, the handle is hingedly connected with the brake lever seat, a piston is arranged in an oil cylinder of the brake lever seat, the inner end of the screw rod is arranged in a groove on the outer end surface of the piston, the screw rod is threadedly connected with the screw hole of the nut column, the nut column penetrates a sleeve, and the nut column and the sleeve are rotationally connected with the handle; the sleeve is provided with a first hole coaxial with the screw hole of the nut column, the first hole is arranged on the side of the screw hole facing the outer end of the screw rod, the screw rod penetrates the screw hole and the first hole, and the inner diameter of the first hole is greater than the small diameter of the outer thread of the screw rod and less than the large diameter of the outer thread of the screw rod.

[0005] In an optional scheme, the sleeve is further provided with a second hole opposite to the first hole, the first hole and the second hole are respectively arranged at the two ends of the screw hole, the screw rod penetrates the second hole, the screw hole and the first hole in sequence, and the inner diameter of the second hole is greater than the large diameter of the outer thread of the screw rod.

[0006] In an optional scheme, the rotation axis between the nut column and the sleeve and the handle is parallel to the rotation axis between the handle and the brake lever seat.

[0007] In an optional scheme, the outer surface of the nut column is provided with a positioning outer plane, and the inner wall of the sleeve is provided with a positioning inner plane corresponding to the positioning outer plane.

[0008] In an optional solution, the sleeve is made of POM material.

[0009] In an optional solution, the handle is provided with two parallel lower arms, and each of the two lower arms is provided with a circular hole, and the two ends of the sleeve are rotationally connected with the circular holes.

[0010] In an optional solution, the handle is provided with an upper extension arm, and the upper extension arm is screwed into an adjusting screw, and the inner end of the adjusting screw abuts against the upper surface of the brake handle seat.

[0011] In an optional solution, the force moment generated by the piston on the handle and the force moment generated by the brake handle seat on the handle through the adjusting screw are balanced with each other.

[0012] In an optional solution, the outer end of the screw rod is fixed with a wrench head.

[0013] In an optional solution, the outer thread of the screw rod is a triangular thread.

[0014] Compared with the prior art, the technical scheme of the present application has the beneficial effects that: a sleeve is arranged on the nut column, and a first hole smaller than the large diameter of the outer thread of the screw rod but larger than the small diameter of the outer thread of the screw rod is arranged outside the corresponding screw hole, so that when the screw rod is twisted to penetrate the screw hole and the first hole, the screw rod will drill into and pass through the first hole like a self-tapping screw, and finally the outer thread of the screw rod will form a mutual tight thread connection with the first hole. During the driving of the bicycle, due to the thread connection between the screw rod and the first hole, the thread connection between the screw rod and the nut column will not be reversed by the vibration, avoiding the increase of the brake idle stroke, while the rotation resistance of the screw rod is not large, the user can directly manually rotate the screw rod for adjustment, without the help of a wrench, the use convenience is guaranteed, the user demand is met, and the product competitiveness is improved.

[0015] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective view of the hydraulic brake handle structure of the present application.

[0017] Figure 2 It is an exploded view of the hydraulic brake handle structure of the present application.

[0018] Figure 3 It is a sectional view of the hydraulic brake handle structure of the present application.

[0019] It should be noted that the products shown in the above views are appropriately reduced / enlarged to adapt to the size of the drawing and to make the views clear, and the size of the products shown in the views is not limited. DETAILED DESCRIPTION

[0020] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0022] Reference to "an embodiment" in this text means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor does it necessarily refer to a particular alternative embodiment. It will be explicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] The hydraulic brake handle structure according to an embodiment of the present application is shown in Figures 1-3 .

[0024] The hydraulic brake handle structure shown in Figure 1 is fixedly installed on a handlebar 10. The handlebar 10 can be a handlebar of a bicycle, an electric vehicle, a tricycle, or a scooter, etc. That is, the hydraulic brake handle structure according to the embodiment can be applied to a bicycle, an electric vehicle, a tricycle, or a scooter, etc.

[0025] As shown in Figure 1 and Figure 2 , the hydraulic brake handle structure includes a brake handle seat 20, a handle 30, a screw rod 40, and a nut column 50. The brake handle seat 20 is used to fixedly connect the handlebar 10 and can rotate around the handlebar 10 to adjust the angle. The handle 30 is hingedly connected to the brake handle seat 20 through a pin shaft 21. When braking, the brake handle seat 20 and the handle 30 bear a large external force, so the brake handle seat 20 and the handle 30 can be made of aluminum or steel to ensure sufficient strength. As shown in Figure 3 .As shown, the cylinder 22 of the brake handle 20 is provided with a piston 23 which can move linearly in the cylinder 22, the ball head 41 of the inner end of the screw rod 40 is arranged in the groove 231 of the outer end surface of the piston 23, and the outer end of the screw rod 40 is fixed with a torsion head 42. When the brake is not operated, the force of the hydraulic oil in the cylinder 22 and the return spring 24 on the piston 23 and the force of the screw rod 40 on the piston 23 are balanced, and the piston 23 is relatively stationary in the cylinder 22.

[0026] As shown in Figure 2 and Figure 3 , the screw rod 40 is threadedly connected with the threaded hole 51 of the nut column 50, the nut column 50 penetrates into a sleeve 60, and the nut column 50 and the sleeve 60 are rotationally connected with the handle 30. As shown in Figure 2 and Figure 3 , the sleeve 60 is provided with a first hole 61 coaxial with the threaded hole 51 of the nut column 50, and the first hole 61 is arranged on the side of the threaded hole 51 facing the outer end of the screw rod 40. The screw rod 40 penetrates through the threaded hole and the first hole 61, and the inner diameter of the first hole 61 is greater than the minor diameter of the external thread of the screw rod 40 and less than the major diameter of the external thread of the screw rod 40. During assembly, the screw rod 40 is twisted to penetrate through the threaded hole 51 and then the first hole 61. Due to the relatively small size of the first hole 61, the screw rod 40 drills into and penetrates through the first hole 61 like a self-tapping screw, and finally the external thread of the screw rod 40 is threadedly connected with the first hole 61. During the driving of the bicycle, due to the thread connection between the screw rod 40 and the first hole 61, the thread connection between the screw rod 40 and the nut column 50 will not be reversed by the vibration, avoiding the increase of the brake idle stroke, and at the same time, the rotation resistance of the screw rod 40 is not large, so the user can directly manually rotate the screw rod 40 for adjustment without the help of a wrench, and the convenience of use is ensured.

[0027] In some embodiments, the sleeve 60 is made of POM material (race steel material), and when the screw rod 40 is rotated to drill into the first hole 61, a corresponding internal thread is formed on the inner wall of the first hole 61, so that the screw rod 40 is threadedly connected with the first hole 61. In addition, the external thread of the screw rod 40 is a triangular thread, so that the resistance when the screw rod 40 drills into and penetrates through the first hole 61 is relatively small, that is, the screw rod 40 is more easily threadedly connected with the first hole 61. When designing the external thread of the screw rod 40, the thread rise angle can be made smaller than the equivalent friction angle of the screw pair, so that after the screw rod 40 is threadedly connected with the threaded hole 51, the screw rod 40 and the nut column 50 form a self-locking, further reducing the probability of reverse rotation of the screw rod 40 by vibration.

[0028] In some embodiments, as shown in Figure 2 and Figure 3As shown, the sleeve 60 is also provided with a second hole 62 opposite the first hole 61, and the first hole 61 and the second hole 62 are respectively arranged at both ends of the threaded hole 51, and the second hole 62 is arranged on the side of the threaded hole 51 facing the inner end of the threaded rod 40. When the threaded rod 40 is installed, the threaded rod 40 penetrates the second hole 62, the threaded hole 51 and the first hole 61 in sequence, and the inner diameter of the second hole 62 is greater than the large diameter of the external thread of the threaded rod 40, so that the second hole 62 does not interfere with the threaded rod 40. Figure 2 In some embodiments, as shown in FIG. 6, the second hole 62 is a circular hole, and in specific implementation, the specific shape of the second hole 62 is not limited, as long as the second hole 62 is provided on the sleeve 60 to accommodate the threaded rod 40.

[0029] In some embodiments, as shown in FIG. 6, Figure 2 and Figure 3 As shown, the rotation axis A between the nut column 50 and the sleeve 60 and the handle 30 is parallel to the rotation axis B between the handle 30 and the brake handle seat 20, and when braking, the handle 30 rotates around the rotation axis A, the handle 30 pushes the threaded rod 40 through the nut column 50, and the threaded rod 40 pushes the piston 23 to move. During this process, the nut column 50 and the sleeve 60 will rotate around the rotation axis B relative to the handle 30, and the parallel rotation axis A and the rotation axis B can better conduct force and have a more direct braking effect.

[0030] In some embodiments, as shown in FIG. 6, Figure 2 As shown, the outer surface of the nut column 50 is provided with a positioning outer plane 52, and the inner wall of the sleeve 60 is provided with a positioning inner plane 63 corresponding to the positioning outer plane 52, so that when the nut column 50 penetrates the sleeve 60, the positioning of the positioning outer plane 52 and the positioning inner plane 63 can directly and accurately align the threaded hole 51 of the nut column 50 with the first hole 61 and the second hole 62, thereby speeding up the assembly time and allowing the sleeve 60 and the nut column 50 to rotate synchronously after assembly.

[0031] In some embodiments, as shown in FIG. 6, Figure 2 As shown, the handle 30 is provided with two parallel lower arms 31, and the two lower arms 31 are respectively provided with circular holes 311, and the two ends of the sleeve 60 are respectively rotationally connected with the circular holes 311. The length of the nut column 50 is the same as the length of the sleeve 60, and the two end faces of the nut column 50 are flush with the two end faces of the sleeve 60, and the handle 30 transmits pressure to the sleeve 60 and the nut column 50 through the two lower arms 31, and the threaded rod 40 is located between the two lower arms 31, so that the threaded rod 40 is not blocked.

[0032] In some embodiments, as shown in FIG. 6, Figure 3As shown, the handle 30 has an upper extension arm 32, which is screwed into an adjusting screw 33, the inner end of the adjusting screw 33 abutting against the upper surface 25 of the brake handle base 20. The end of the adjusting screw 33 is fixed with a circlip 34 to avoid the adjusting screw 33 from being detached from the upper extension arm 32. The torque generated by the handle 30 through the screw rod 40 and the torque generated by the brake handle base 20 through the adjusting screw 33 are balanced with each other. The grip distance of the handle 30 can be adjusted by twisting the adjusting screw 33. Since the adjusting screw 33 defines the initial position of the handle 30, when the handle 30 returns to the initial position, the piston 23 will not be detached from the oil cylinder 22 due to the limitation of the screw rod 40, thus the inner hole circlip for limiting the piston 23 at the opening of the oil cylinder 22 is not needed, which reduces the component cost and simplifies the assembly process.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can include one or more of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0035] In the description of the present application, the description referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the present application, the illustrative description 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 the specification.

[0036] The above is only to further illustrate the technical content of the present application by way of examples, so that the reader is easier to understand, but not represent the implementation of the present application is limited to this, any technical extension or re-creation of the present application is made, are protected by the present application. The scope of protection of the present application is subject to the claims.

Claims

1. A hydraulic brake lever structure, comprising a brake lever seat, a handle, a screw, and a nut post, wherein the handle is hinged to the brake lever seat, a piston is provided in the cylinder of the brake lever seat, the inner end of the screw is placed in a groove on the outer end face of the piston, and the screw and the threaded hole of the nut post form a threaded connection, characterized in that, The nut post is inserted into a sleeve, and the nut post and the sleeve are rotatably connected to the handle; the sleeve has a first hole, which is coaxial with the screw hole of the nut post. The first hole is located on the side of the screw hole facing the outer end of the screw rod. The screw rod passes through the screw hole and the first hole. The inner diameter of the first hole is larger than the minor diameter of the screw rod's external thread and smaller than the major diameter of the screw rod's external thread.

2. The hydraulic brake lever structure as described in claim 1, characterized in that, The sleeve is also provided with a second hole opposite to the first hole. The first hole and the second hole are respectively located at both ends of the screw hole. The screw passes through the second hole, the screw hole and the first hole in sequence. The inner diameter of the second hole is larger than the major diameter of the external thread of the screw.

3. The hydraulic brake lever structure as described in claim 1, characterized in that, The rotation axis between the nut post and sleeve and the handle is parallel to the rotation axis between the handle and the brake lever seat.

4. The hydraulic brake lever structure as described in claim 1, characterized in that, The outer surface of the nut column is provided with a positioning outer plane, and the inner wall of the sleeve is provided with a positioning inner plane that corresponds to and fits the positioning outer plane.

5. The hydraulic brake lever structure as described in claim 1, characterized in that, The sleeve is made of POM material.

6. The hydraulic brake lever structure as described in claim 1, characterized in that, The handle has two parallel lower arms, each with a circular hole, and the two ends of the sleeve are rotatably connected to the circular holes.

7. The hydraulic brake lever structure as described in claim 1, characterized in that, The handle has an upper extension arm, and an adjusting screw is screwed into the upper extension arm. The inner end of the adjusting screw abuts against the upper surface of the brake lever seat.

8. The hydraulic brake lever structure as described in claim 7, characterized in that, The torque generated by the piston on the handle through the screw is balanced by the torque generated by the brake lever seat on the handle through the adjusting screw.

9. The hydraulic brake lever structure as described in claim 1, characterized in that, A torsion head is fixed to the outer end of the screw.

10. The hydraulic brake lever structure as described in claim 1, characterized in that, The external thread of the screw is a triangular thread.

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