TWI638730B - Assembling and positioning structure for bicycle hub ratchet tube - Google Patents

Abstract

An assembly and positioning structure of a bicycle hub ratchet cylinder has an assembly space in an axial inner portion of a hub body, an internal thread portion is formed at one end of an inner wall surface of the assembly space; and a surface of a lock member has an external thread And a ring portion having a ring portion, the distance between the external thread portion and the ring portion is a mounting portion, the locking member engages the internal thread portion of the hub body with the external thread portion; a ratchet cylinder shaft Forming a passage space into the interior, a latching groove is formed at one end of the inner wall surface of the passage space, and one end of the ratchet cylinder is inserted into the assembly space of the hub body and sleeves one end of the lock member, so that a mounting portion of the latching groove relative to the locking member; a C-shaped positioning member for assembling the mounting portion of the locking member and extending into the latching recess of the ratchet cylinder, the locking member And the ratchet cylinders are connected to each other. In this way, the structure is simplified and the convenience of assembly is achieved.

Description

Assembly and positioning structure of bicycle flower hub ratchet

The invention relates to the technical field of a bicycle, in particular to an assembly and positioning structure of a bicycle hub ratchet cylinder.

Generally, the rear flower hub of the bicycle mainly comprises a flower hub shell assembly with a ratchet set and a mandrel. The ratchet set includes a ratchet cylinder and a fixing bolt, and the ratchet cylinder is fixed to the hub shell through the fixing bolt. One end of the ratchet cylinder has a mounting opening, and the inner surface of the ratchet cylinder is formed with a step adjacent to the assembly opening; and one end of the fixing bolt is formed with a convex ring, and the other end is formed with an external thread portion, and the fixing bolt is further A plurality of slits are provided by one end of the convex ring.

One end of the fixing bolt is provided with the convex ring, and the fixing bolt penetrates into the ratchet cylinder. During the process of inserting the fixing bolt into the ratchet cylinder, each of the slits is forced by the fitting opening to cause a slight deformation of the fixing bolt. The amount of the ratchet cylinder can pass through the assembly port of the ratchet cylinder. After the fixing bolt passes through the assembly port of the ratchet cylinder, the fixing bolt loses the force of the assembly port and can be reset and locked in the step. A fixing bolt is positioned on the ratchet cylinder. After the ratchet cylinder is assembled with the fixing bolt, the ratchet set is further locked to the hub shell through the external thread portion of the fixing bolt, and the spindle also passes through the ratchet set and the hub shell lock setting position. Assembly of the flower hub after completion.

It can be seen from the above that the ratchet cylinder of the ratchet set must be fixed to the hub shell through the fixing bolt, and the convex ring, the external thread portion and the slit of the fixing bolt are all smoothly arranged during assembly. The ease of assembly and the positioning accuracy after assembly, as long as the size of the convex ring, the external thread portion or the slit on the fixing bolt is in error, there is a possibility that assembly is difficult or the positioning is not correct; therefore, the fixing is produced. The dimensional accuracy of the bolt is extremely high. However, the fixing bolt is mainly produced by first molding the main body, and then forming the external thread portion, the slits or the convex ring twice, and forming the main body in a large number of molds. The cumulative error in the size of the process will cause defects in dimensional accuracy that are difficult to control; and the secondary machining of the externally threaded portion, the slits or the collar also has certain precision requirements and needs to be matched with special tools or machining processes. This in turn results in a lack of processing, time-consuming and high production costs.

In addition, the Taiwan Patent No. I549837 discloses that the flower hub structure uses an elastically deformable ring cushion member to mount an axial direction of a locking member, and the two ends of the locking member are respectively combined with a ratchet cylinder and a flower hub shell, wherein the ring is combined. The cushion member is embedded in a groove of the wall surface of the ratchet cylinder by utilizing its own elastic deformation property. This method is more streamlined and easier to process than the previously described structure. However, the circumference of the ring cushion member is closed. In the process of inserting the groove, the ring cushion member must accurately grasp the deformation direction and the deformation amount of the ring cushion member, so as to smoothly make the ring cushion. The piece is embedded in the groove, so the operation and assembly are obviously inconvenient.

The object of the present invention is to solve the inconvenience of the conventional assembly of the flower hub and the ratchet cylinder, and the disadvantages of complicated structure and difficult processing.

The object of the present invention is to provide an assembly and positioning structure of a bicycle hub ratchet cylinder, which has the advantages of compact structure and convenient assembly.

In order to achieve the above object and effect, the member and the combined form disclosed in the present invention comprise an assembly space of an axial inner portion of a hub body, and an internal thread portion is formed on an inner wall surface of the assembly space. One end; a surface of the locking member has an external thread portion and a ring portion at one end, the spacing between the external thread portion and the ring portion is a mounting portion, and the locking member engages the flower hub with the external thread portion The internal thread portion of the body; a ratchet cylinder axially forms a passage space, a latching groove is formed at one end of the inner wall surface of the passage space, and one end of the ratchet cylinder is inserted into the assembly space of the hub body and Nesting one end of the locking member such that the locking groove is opposite to the mounting portion of the locking member; a C-shaped positioning member for assembling the mounting portion of the locking member and extending into the ratchet barrel The latching groove allows the latching member and the ratchet cylinder to be coupled to each other.

10‧‧‧flower hub

12‧‧‧Assembly space

14‧‧‧Threaded Department

20‧‧‧ratchet

22‧‧‧Channel space

24‧‧‧cartridge groove

26‧‧‧Assembly

30‧‧‧Locks

32‧‧‧External thread

34‧‧‧ Ring Block

36‧‧‧Installation Department

38‧‧‧ positioning groove

40‧‧‧C-shaped positioning parts

50‧‧‧End plugs

52‧‧‧ holes

60‧‧‧ mandrel

Figure 1 is an exploded view of the present invention.

Figure 2 is a schematic view of the combined structure of the present invention.

Figure 3 is a schematic view of a partial assembly structure of the present invention.

Figure 4 is a schematic view showing a partial combination structure of another embodiment of the present invention.

Referring to Figures 1 and 2, a hub body 10, a ratchet cylinder 20, a lock member 30, a C-shaped positioning member 40 and an end plug member 50 are disclosed to form a rear wheel hub of a bicycle.

The hub body 10 has an assembly space 12 axially inside, and an internal thread portion 14 is formed at one end of the inner wall surface of the assembly space 12. Secondly, the assembly space 12 is provided with a suitable rotating mechanism and an engaging mechanism for matching the rotation requirements of the hub body 10. However, the rotation mechanism and the engagement mechanism are necessary mechanisms for the general rear wheel hub, and are not technical features of the present invention, and thus will not be described again.

The ratchet cylinder 20 is configured to be disposed at one end of the hub body 10. Further, the ratchet cylinder 20 is formed with a passage space 22 in the axial direction. A latching groove 24 is formed at one end of the inner wall surface of the passage space 22. One end of the ratchet barrel 20 is placed in the assembly space 12 of the hub body 10. Further, the ratchet cylinder 20 has an assembly section 26 at one end thereof for fitting into the assembly space 12 of the hub body 10, and the latching groove 24 is formed in the axial direction of the assembly section 26. Inner inner wall surface.

Referring to FIGS. 1 and 3, the locking member 30 has an external thread portion 32 on one surface and a ring portion 34 at one end. The distance between the external thread portion 32 and the ring portion 34 is a mounting portion 36. The external thread portion 32 engages the internal thread portion 14 of the hub body 10, and the ring portion 34 at one end of the locking member 30 is embedded in the axial inner portion of the ratchet barrel 20 such that the lock The mounting portion 36 of the connector 30 opposes the latching recess 24 of the barrel 20 .

The C-shaped positioning member 40 is used to assemble the mounting portion 36 of the locking member 30. Further, the C-shaped positioning member 40 extends the periphery of the outer edge into the latching recess 24 of the ratchet cylinder 20 by utilizing its own elastic expansion property. Thus, the direction in which the ratchet cylinder 20 is disengaged from the hub body 10 is blocked by the C-shaped positioning member 40, so that the ratchet cylinder 20 is not disengaged, and the rotation smoothness of the ratchet cylinder 20 is not affected.

Second, the end plug 50 has a tapered ring configuration with a perforation 52 at the center (see Figure 1). The end plug 50 is disposed inside one end of the ratchet barrel 20 and opposite to the C-shaped positioning member 40. Thus, the combination of the ratchet cylinder 20 and the lock member 30 can be more stabilized by the end plug member 50.

Referring to FIG. 4, another embodiment of the present invention has a positioning recess 38 formed on the surface of the mounting portion 36 of the locking member 30. The locking member 30 is coupled to the ratchet barrel 20 such that the positioning groove 38 is opposite to the card 掣 Groove 24. The C-shaped positioning member 40 is for mounting opposite to the positioning groove 38 and the latching recess 24, thereby preventing the ratchet cylinder 20 from being disengaged.

The axially inner portion of the rear wheel hub disclosed in each of the above embodiments has a mandrel 60 passing through the hub body 10, the ratchet barrel 20, the lock member 30, the C-shaped positioning member 40 and the end plug. The combined structure of the members 50, and the mandrel 60 is mounted on a bicycle frame.

According to the description of the above examples, the present invention utilizes the C-shaped positioning member 40 to be mounted on the locking member 30, and the C-shaped positioning member 40 can be embedded in the inner wall surface of the ratchet cylinder 20 by its own elastically varying outer diameter characteristics. The latching groove 24, in turn, causes the ratchet cylinder 20 to be positioned and smoothly rotated. The technical features adopted by the invention have the advantages of compact structure and simple assembly.

The above embodiments are merely illustrative of the technology of the present invention and its effects, and are not intended to limit the present invention. Any person skilled in the art can modify and change the above embodiments without departing from the technical principles and spirit of the present invention. Therefore, the scope of protection of the present invention should be as described in the following patent application. Column.

Claims (4)

An assembly and positioning structure of a bicycle hub ratchet cylinder comprises: a hub body having an assembly space in an axial direction, an internal thread portion formed at one end of an inner wall surface of the assembly space; and a locking member surface Having an externally threaded portion and a ring having a ringing portion, the spacing between the externally threaded portion and the ringing portion is a mounting portion, the locking member engaging the female threaded portion of the hub body with the externally threaded portion; a ratchet wheel, a channel space is formed in the axial direction, a latching groove is formed at one end of the inner wall surface of the channel space, and one end of the ratchet cylinder is inserted into the assembly space of the hub body and the locking is sleeved One end of the piece is such that the latching groove is opposite to the mounting portion of the latching member; a C-shaped positioning member is configured to be assembled to the mounting portion of the latching member and extends into the latching recess of the ratchet barrel The slot is configured to connect the lock member and the ratchet barrel to each other. The assembly and positioning structure of the bicycle hub ratchet according to the first aspect of the invention, wherein the mounting portion of the locking member is formed with a positioning groove, the positioning groove is for opposing the latch groove, and the positioning groove The C-shaped positioning member is mounted in the groove relative to the positioning groove and the latch. The assembly positioning structure of the bicycle hub ratchet according to claim 1, wherein one end of the ratchet cylinder has an assembly section for inserting into the assembly space of the hub body, and the card is concave The groove is formed in an inner wall surface of the axial inner portion of the fitting section. The assembly positioning structure of the bicycle hub ratchet according to claim 1, further comprising an end plug member having a tapered ring shape and having a through hole at the center, wherein the end plug is disposed at the end The ratchet barrel is inside one end and opposite to the C-shaped positioning member.