TWI696770B - Hub structure with multi-engagement block - Google Patents

Abstract

A hub structure is a combination of a body and a ratchet cylinder. The axial inner portion of the body is provided with a plurality of tooth blocks; the end surface of the ratchet cylinder has a driving surface. Each of the tooth blocks can be engaged with the driving surface by elastic displacement, or each of the tooth blocks can be engaged with the driving surface by a suitable mounting position. The angle of rotation required to re-drive the hub is significantly reduced, thereby increasing the reaction speed of the re-drive and reducing the frustration during re-driving.

Description

Wheel hub structure with multiple tooth blocks

The invention relates to the technical field of a bicycle hub, in particular to a hub structure with multiple tooth blocks.

The driving mechanism of a general bicycle hub includes the use of a pawl on one end of the ratchet barrel to mesh with the ring gear inside the hub body, or a tooth plate in the hub body is relatively engaged with the tooth surface of the end surface of the ratchet barrel. Each tooth surface has a plurality of teeth, and the adjacent two teeth have a distribution angle (angle); the tooth surface of the ratchet barrel end surface also has a plurality of teeth, and the adjacent two teeth have a distribution angle (angle) . The distribution angles of the two are the same, so the tooth plate and the tooth surface can fully mesh.

The positive rotation of the ratchet barrel can provide the transmission of torsional force through the teeth that mesh with each other. When the ratchet barrel rotates in the opposite direction, the tooth surface and the tooth plate rotate relative; when the ratchet barrel rotates forward again, if the teeth of the tooth plate and the tooth surface are misaligned, the tooth surface and the tooth plate To re-engage, the maximum rotation angle of the tooth surface is the angle of the distribution angle.

In other words, the greater the angle of the distribution angle, the greater the rotation angle that re-engages the tooth surface with the tooth plate. The smaller the angle of the distribution angle, the smaller the rotation angle that can re-engage the tooth surface and the tooth plate, but the cost of manufacturing the tooth surface and the tooth plate is high. In addition, the smaller the distribution angle, the more the number of teeth and the smaller the tooth shape. The meshing firmness of the tooth surface and the tooth plate is less, and it is easy to cause the tooth surface and the tooth plate to slip off during rotation.

The object of the present invention is to provide a hub structure with multiple tooth blocks, which has the effect of making the assembly of the tooth blocks easier.

The purpose of the present invention is to provide a hub structure with multiple tooth blocks, which has a significantly reduced rotation angle required for re-driving the ratchet barrel, thereby increasing the reaction speed of re-driving and reducing the frustration during re-driving.

In order to achieve the above purpose and effect, the hub structure disclosed in the present invention includes an assembly space in the axial direction of the body; a first engaging component includes two elastically movable first tooth blocks, and the two first tooth blocks are mounted on In the assembly space of the body, each side surface of each first tooth block has a plurality of first teeth, and the distribution angle between two adjacent first teeth is a first engagement distribution angle; a second engagement component includes Two elastically movable second tooth blocks, two of the first tooth blocks are installed in the assembly space of the body, a side surface of each second tooth block has a plurality of second teeth, and two adjacent second The distribution angle between the teeth is a second meshing distribution angle; a ratchet barrel, one end of which has a driving tooth surface, the driving tooth surface has a plurality of driving teeth, and the distribution angle of two adjacent driving teeth is a driving tooth distribution Angle, the ratchet barrel is installed at one end of the body, the driving tooth surface is opposite to the first tooth of the first meshing component and the second tooth of the second meshing component; wherein the first meshing component meshes with the second The component is displaced toward the ratchet barrel, so that at least one of the first engagement component and the second engagement component is engaged with the ratchet barrel.

In the following, according to the purpose and effect of the present invention, comparative examples are given, and the components and combinations thereof are described in detail with reference to the drawings.

10: Ontology

12: Mandrel

14: Assembly space

16: Mount

18: Rongzhi Point

19: Female thread

20: The first engagement assembly

22: The first tooth block

24: Spring

26: First radial centerline

28: first tooth

30: second engagement assembly

32: second tooth block

34: Spring

36: Second radial centerline

38: second tooth

40: Third engagement assembly

42: third tooth block

44: Spring

46: Third radial centerline

48: third tooth

50: ratchet barrel

52: Drive tooth surface

54: driving tooth

60: Mount

62: External thread part

64: Rongzhi Point

Figure 1 is an exploded view of the first embodiment of the present invention; Figure 2 is an exploded view of the second embodiment of the present invention; Figure 3 is a schematic view of the installation position of the first tooth block and second tooth block of the present invention; Figure 4 is a structural view of the drive tooth surface of the present invention; Figure 1 is a schematic diagram 1 of the meshing state of the first tooth block, the second tooth block and the driving tooth surface of the present invention; Figure 6 is a schematic diagram 2 of the meshing state of the first tooth block, the second tooth block and the driving tooth surface of the present invention; The figure is a schematic diagram of the installation positions of the first tooth block, the second tooth block and the third tooth block of the present invention.

Please refer to FIG. 1, this embodiment discloses that a body 10 axially penetrates a mandrel 12. The body 10 has an assembly space 14 in the axial direction. A first engagement component 20, a second engagement component 30 and a third engagement component 40 are installed in the assembly space 14 of the body 10. A ratchet barrel 50 has a driving tooth surface 52 at one end. The ratchet barrel 50 is installed at one end of the body 10, the mandrel 12 passes through the ratchet barrel 50, the driving tooth surface 52 is opposite to the first engagement assembly 20, the second engagement assembly 30 and the third engagement assembly 40.

Further, the assembly space 14 of the body 10 has a mounting base 16. The mounting base 16 is formed in the assembly space 14, so that the body 10 is integrated. Secondly, the mounting base 16 has a plurality of accommodating holes 18, and each accommodating hole 18 is formed into a non-penetrating shape.

The first engaging component 20 includes two elastically movable first tooth blocks 22 installed in the assembly space 14; for example, each of the first tooth blocks 22 can be matched with at least one spring 24 and installed on the mounting The accommodating cavity 18 of the seat 16. 2. The first tooth block 22 is relatively 180 degrees.

The second engaging element 30 includes two elastically movable second tooth blocks 32 installed in the assembly space 14; for example, each of the second tooth blocks 32 can be matched with at least one spring 34 and installed on the mounting The accommodating cavity 18 of the seat 16. 2. The second tooth block 32 is relatively 180 degrees.

The third engaging element 40 includes two elastically movable third tooth blocks 42 installed in the assembly space 14; for example, each of the third tooth blocks 42 can be matched with at least one spring 44 and installed on the mounting The accommodating cavity 18 of the seat 16. 2. The third tooth block 42 is relatively 180 degrees.

Please refer to another embodiment shown in FIG. 2. The inner wall of one end of the assembly space 14 of the body 10 disclosed in the figure has an internal thread portion 19. A peripheral portion of a mounting base 60 has an external thread 62. The surface of one end portion has a plurality of accommodating holes 64, and each accommodating hole 64 is not formed into a through shape. The mounting base 60 engages the internal thread portion 19 by the external thread portion 62, so that the mounting base 60 is positioned in the assembly space 14 of the body 10. The material hardness of the mounting base 60 may be greater than the material hardness of the body 10.

The first engagement component 20, the second engagement component 30 and the third engagement component 40 can be elastically installed in the receiving cavity 64. One end of the ratchet barrel 50 has a driving tooth surface 52. The ratchet barrel 50 is installed at one end of the body 10, the mandrel 12 passes through the ratchet barrel 50, the driving tooth surface 52 is opposite to the first engagement assembly 20, the second engagement assembly 30 and the third engagement assembly 40.

According to the structures disclosed in the above two embodiments, part or all of the tooth blocks of the first meshing component 20, the second meshing component 30, and the third meshing component 40 can be forced toward the driving of the ratchet barrel 50 The tooth surface 52 is displaced, and the tooth block is engaged with the driving tooth surface 52; in this way, the rotation of the ratchet barrel 50 can link the tooth block and the body 10, causing the body 10 to rotate.

Since some or all of the tooth blocks can be used to engage the driving tooth surface 52, any one of the tooth blocks is worn, and only the tooth block needs to be replaced. Therefore, maintenance is convenient and maintenance costs can be saved. In addition, the first tooth block 22, the second tooth block 32, and the third tooth block 42 can be made into the same shape and structure, so the installation process does not need to consider the installation of the tooth block on the mounting base 16 or 60 Location, so this embodiment can make installation easier.

Please refer to FIG. 3, in this embodiment, the first tooth block 22 has an arc shape, and the first tooth block 22 has a first radial center line 26, and the first radial center line 26 passes through The arc center of the first tooth block 22; secondly, a side surface of the first tooth block 22 has a plurality of first teeth 28, and the distribution angle between two adjacent first teeth 28 is a first meshing distribution angle A.

Similarly, the outer shape of the second tooth block 32 is arc-shaped, and the second tooth block 32 has a second radial center line 36, and the second radial center line 36 passes through the arc shape of the second tooth block 32 Center; secondly, one side surface of the second tooth block 32 has a plurality of second teeth 38, the distribution angle between two adjacent second teeth 38 is a second meshing distribution angle B.

Please refer to FIG. 4, the driving tooth surface 52 has a plurality of driving teeth 54. The distribution angle between two adjacent drive teeth 54 is the drive tooth distribution angle C.

According to FIGS. 3 and 4, the angle of the driving tooth distribution angle C and the first meshing distribution angle A and the second meshing distribution angle B can be designed to be equal.

For example, if the driving tooth surface 52 can be counted as having sixty teeth, the driving tooth distribution angle C between two adjacent driving teeth 54 is six degrees; further, the first meshing distribution angle A and The second meshing distribution angle B is all six degrees. In this way, the first tooth block 22 and the second tooth block 32 can form a tight mesh with the driving tooth surface 52.

Further, please refer to FIG. 3 again, the corresponding included angle between the installation positions of the two adjacent engagement components can be in the form of unequal angles. Specifically, two of the first tooth blocks 22 and two of the second tooth blocks 32 are arranged on the same circumference; two of the first tooth blocks 22 are opposite one hundred and eighty degrees, and two of the second tooth blocks 32 are opposite one hundred and eighty Ten degrees, and each of the second tooth blocks 32 is located between the two first tooth blocks 22. The angle between the first radial centerline 26 of the first tooth block 22 and the two adjacent second radial centerlines 36 is different. Where the first radial centerline 26 The angle between one second radial centerline 36 is greater than the angle between the first radial centerline 26 and the other second radial centerline 36, and the difference is less than the angle of the first meshing distribution angle A .

According to the above description, the distribution angle A, the distribution angle B and the distribution angle C are all six degrees, and the angle difference between the first radial centerline 26 and the second radial centerline 36 on both sides may be two Degree or third degree. In other words, in the form of four quarters of the circumference, the first tooth block 22 is located at the equal position, and the second tooth block 32 is offset from the equal position.

Please refer to FIG. 5, taking the offset of the second tooth block 32 equal to three degrees (that is, half the angle of the offset distribution angle) as an example, because the first tooth block 22, the second tooth block 32 and The distribution angle between two adjacent teeth on the surface of the driving tooth surface 52 is equal, so that when the first tooth block 22 meshes with the driving tooth surface 52, the second tooth block 32 is offset by an equal position due to the mounting position, resulting in The second tooth block 32 cannot mesh with the driving tooth surface 52. In other words, the driving tooth surface 52 of the ratchet barrel (not shown) rotates forward, and the body (not shown) of the hub can be rotated by driving the first tooth block 22. It is worth noting that the second tooth block 32 leans against the driving tooth surface 52, but the second tooth block 32 does not fully mesh with the driving tooth surface 52. Furthermore, the second tooth block 32 and the driving tooth surface 52 can be fully meshed only by three degrees.

Please refer to FIG. 6, when the driving tooth surface 52 of the ratchet barrel (not shown) rotates in the reverse direction, and then rotates forward again, then the driving tooth surface 52 can be rotated under the condition of less than or equal to three degrees , Meshing with the second tooth block 32 or the first tooth block 22.

The hub structure disclosed in this embodiment, in addition to making assembly easier, can significantly reduce the rotation angle required for re-driving, thereby increasing the reaction speed of re-driving and reducing the frustration during re-driving.

Please refer to FIG. 7, this embodiment includes the first engaging component 20, the second engaging component 30 and the third engaging component 40, wherein the third tooth 42 of the third engaging component 40 has a plurality of surfaces on one side The third tooth 48, and the distribution angle between two adjacent third teeth 48 is a third meshing distribution angle D. The third meshing distribution angle D has the same angle as the first meshing distribution angle A and the second meshing partial angle B. The outer shape of the third tooth block 42 is arc-shaped, and the third tooth block 43 has a third radial center line 46, and the third radial center line 46 passes through the arc center of the third tooth block 42.

The third tooth block 42 is located between the first tooth block 22 and the second tooth block 32, and the angle between the third radial center line 46 and the first radial center line 26 may be equal to the third radial center line The angle between 46 and the second radial centerline 36. Secondly, the angle between the third radial centerline 46 and the first radial centerline 26, and the angle between the third radial centerline 46 and the second radial centerline 36, and the angle between the two The difference may be less than or equal to the angle of the first mesh distribution angle. It can be understood that by adjusting the installation position, the difference between the two included angles may be greater than the angle of the first meshing distribution angle.

According to the teaching described above, when the first tooth block 22 meshes with the driving tooth surface 52, the second tooth block 32 and the third tooth block 42 do not fully mesh with the driving tooth surface 52; the driving tooth surface 52 rotates forward The body (not shown) of the hub can be rotated by driving the first tooth block 22.

When the driving tooth surface 52 of the ratchet barrel (not shown) rotates in the reverse direction, and then rotates forward again, then the driving tooth surface 52 can rotate with the second angle under the condition that the rotation angle is less than the distribution angle The tooth block 32 or the third tooth block 43 or the first tooth block 22 is engaged.

The above are the preferred embodiments and design drawings of the present invention, but the preferred embodiments and design drawings are only examples and are not intended to limit the scope of the rights of the art of the present invention. Any equal technical means or the following Those who implement the scope of rights covered by the content of "Patent Application" shall not deviate from the scope of the present invention and shall be the scope of rights of the applicant.

10: Ontology

12: Mandrel

14: Assembly space

16: Mount

18: Rongzhi Point

20: The first engagement assembly

22: The first tooth block

24: Spring

30: second engagement assembly

32: second tooth block

34: spring teeth

40: Third engagement assembly

42: third tooth block

44: Spring

50: ratchet barrel

52: Drive tooth surface

54: driving tooth

Claims (9)

A hub structure with multiple tooth blocks includes: a body with an assembly space in the axial direction; a first engagement component including two elastically movable first tooth blocks, and the two first tooth blocks are installed In the assembly space of the body, each side surface of each first tooth block has a plurality of first teeth, and the distribution angle between two adjacent first teeth is a first engagement distribution angle; a second engagement component , Which includes two elastically movable second tooth blocks, the two first tooth blocks are installed in the assembly space of the body, each side surface of the second tooth block has a plurality of second teeth, adjacent two The distribution angle between the second teeth is a second meshing distribution angle; a ratchet barrel, one end of which has a driving tooth surface, the driving tooth surface has a plurality of driving teeth, and the adjacent two of the driving teeth have a distribution angle of one The distribution angle of the driving teeth, the ratchet barrel is installed at one end of the body, the driving tooth surface is opposite to the first teeth of the first meshing assembly and the second teeth of the second meshing assembly; wherein the first meshing assembly and the The second engagement component is displaced toward the ratchet barrel, so that at least one of the first engagement component and the second engagement component comes into engagement with the ratchet barrel. The hub structure with multiple tooth blocks as described in item 1 of the patent application range, wherein the angles of the first meshing distribution angle, the second meshing distribution angle and the driving tooth distribution angle are the same. The hub structure with multiple tooth blocks as described in item 1 of the patent application scope, wherein two of the first tooth blocks of the first engaging component are 180 degrees opposite, and two second teeth of the second engaging component The blocks are relatively 180 degrees, one second tooth block is located between two first tooth blocks. The hub structure with multiple tooth blocks as described in item 3 of the patent application scope, wherein the outer shape of the first tooth block is arc-shaped, and the first tooth block has a first radial centerline, the first radial The center line passes through the arc center of the first tooth block; the outer shape of the second tooth block is arc-shaped, and the second tooth block has A second radial centerline, the second radial centerline passing through the arc center of the second tooth block; the angle between the first radial centerline and the adjacent two second radial centerlines is different . The hub structure with multiple tooth blocks as described in item 4 of the patent application scope, wherein the angle between the first radial centerline and a second radial centerline is greater than the first radial centerline and the other The angle between the second radial centerlines, and the difference is smaller than the angle of the first meshing distribution angle. The hub structure with multi-tooth blocks as described in item 1 of the scope of the patent application further includes a third engagement component, which includes two elastically movable third tooth blocks, and the third tooth blocks are mounted on the body In the assembly space, one side surface of each third tooth block has a plurality of third teeth, the distribution angle between two adjacent third teeth is a third meshing distribution angle, and the third meshing distribution angle is A meshing distribution angle has the same angle, and the first meshing component, the second meshing component, and the third meshing component are displaced toward the ratchet barrel, so that the first meshing component, the second meshing component, and the third meshing component At least one of the components is in mesh with the ratchet barrel. The hub structure with multiple tooth blocks as described in item 6 of the patent application range, wherein the outer shape of the first tooth block is arc-shaped, and the first tooth block has a first radial centerline, the first radial The center line passes through the arc center of the first tooth block; the outer shape of the second tooth block is arc-shaped, and the second tooth block has a second radial center line, and the second radial center line passes through the second The arc center of the tooth block; the outer shape of the third tooth block is arc-shaped, and the third tooth block has a third radial center line, and the third radial center line passes through the arc center of the third tooth block The third tooth block is located between the first tooth block and the second tooth block, the angle between the third radial centerline and the first radial centerline is equal to the third radial centerline and the second The angle between the radial centerlines. The hub structure with multiple tooth blocks as described in item 1 of the patent application scope, wherein the assembly space of the body has a mounting seat, the surface of the mounting seat has a plurality of accommodating holes, each of the first tooth blocks And the second tooth block is matched with a spring, and the combination of the first tooth block and the spring and the combination of the second tooth block and the spring are accommodated in the accommodating cavity. The hub structure with multiple tooth blocks as described in item 1 of the patent application scope further includes an assembly space in which the mounting seat is locked to the body, the surface of the mounting seat has a plurality of accommodating holes, and each of the first tooth blocks And the second tooth block is matched with a spring, and the combination of the first tooth block and the spring and the combination of the second tooth block and the spring are accommodated in the accommodating cavity.

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