TWM481185U - Bicycle front fork steering device - Google Patents

Description

Bicycle front fork steering device

The present invention relates to a bicycle front fork steering device, and more particularly to a bicycle front fork steering device suitable for use in a bicycle suspension front fork to maintain the original steering control function of the bicycle, and even to combine the front fork with the suspension effect.

Press, the general bicycle system uses the handle to control the degree of left and right swing of the front wheel to maintain the balance of the car body and achieve the purpose of controlling the steering of the car body; and the handle of the bicycle is extended by a vertical and vertical extending pipe to extend the handle and the front fork The distance between the tubes makes the steering action of the bicycle tend to be slowed down; and a pressing component is additionally provided to form the combination of the upper fork upper tube and the vertical tube, so that the front fork upper tube and the frame can be maintained. Some stability.

Secondly, with the continuous improvement of bicycle functions and uses, the above traditional steering mechanism will not be able to meet the design requirements of bicycles; for example, during the actual riding process of the bicycle, the rider often has to rely on acceleration or road bumps. The way the hips are vacant is to ride the bicycle. At this time, the rider's center of gravity will lean forward toward the handle. The handle supports the rider to balance the center of gravity. The same front wheel vibration is transmitted to the rider via the steering mechanism. Arms.

Therefore, in addition to the stable engagement structure, many steering mechanisms between the bicycle handle and the front fork further provide a suitable shock absorbing effect, in order to increase the comfort of bicycle riding and reduce sports injuries. A bicycle steering mechanism having a suspension effect is mainly provided with an outer tube as a first set of joints for connecting with a bicycle handle, and a mandrel extending into the outer tube as a self-contained The second set of connecting bodies connected to the front fork is further provided with a spring between the outer tube and the mandrel for elastically resetting the outer tube and the mandrel, thereby providing the bicycle with a shock absorbing function. The above-mentioned conventional steering mechanism is also known as U.S. Patent No. 5,702,092 and the Patent Publication No. 1237931A of the People's Republic of China.

However, in the above-mentioned conventional steering mechanism, the outer tube body is matched with the above-mentioned large-sized bearing, and the outer tube body is not made to be reduced, so the riser connected to the outer tube 20 must be a special riser. 100, as shown in the seventh figure, can be assembled with the outer tube 20, and the special riser 100 also needs to be separately opened and manufactured.

In view of this, the present invention provides a bicycle front fork steering device, especially a bicycle front fork suitable for use in a bicycle suspension front fork to maintain the original steering control function of the bicycle, and even to combine the front fork with the suspension effect. Steering device for its main purpose.

In order to achieve the above, the fork steering device of the present invention is provided by an outer tube and a shaft tube for respectively connecting with the handle and the front fork of the bicycle, and the outer tube is sleeved with a frame tube; wherein the outer tube has the first a second outer tube body and an outer tube tapered portion, the outer tube tapered portion being connected between the first and second outer tube bodies, such that the first outer tube body has a smaller diameter The second outer tube body protrudes from the frame tube and is connected to the handle of the bicycle, and has a first bearing relatively sleeved on the frame tube and the outer tube Between the tubes, and the first bearing is located at the top end of the second outer tube body and below the tapered portion of the outer tube to achieve the purpose of controlling the front fork by the handle of the bicycle.

In order to achieve the above object, a lining set is further provided, the lining set is provided with a plurality of second linings, and the second linings are respectively lined between the corresponding first rotation defining portions and the first linings.

In order to achieve the above object, a lining set is further provided, and the lining set is provided And a plurality of second linings respectively lined between the corresponding second rotation defining portions and the first linings.

In order to achieve the above object, a second bearing is further disposed, the second bearing is relatively sleeved between the frame tube and the outer tube, and the second bearing is located at the bottom end of the frame tube.

To achieve the above object, the frame tube is formed with a shielding tube portion outside the tapered portion of the outer tube, and the tapered portion of the outer tube can be shielded.

The above-mentioned frame tube is integrally formed with the shielding tube portion; or the frame tube and the shielding tube portion are assembled with each other.

In order to achieve the above purpose, the shaft tube is provided with a guide post for restricting the sliding stroke of the shaft tube and the outer tube, and a guide tube is disposed between the guide post and the outer tube for the outer tube and the shaft The tube constitutes an elastic element that acts elastically.

In order to achieve the above object, the outer tube is provided with a fixing block at an inner wall thereof above the shaft tube, and a center of the fixing block is provided with a screw hole, and the top end of the guiding rod passes through the shaft tube and The screw hole is screwed; the bottom end of the shaft tube is screwed with a fixing block for restricting the elastic element to fall; the guide post is provided with a support ring seat near the bottom end, and the guide post passes through the The bottom end of the through hole of the support ring seat is provided with a stop portion having an outer diameter larger than the through hole of the support ring, and the stop portion is disposed at a position above the elastic member and is in contact with the elastic member.

In order to achieve the above object, each of the first rotation defining portions of the outer tube has a planar shape, and each of the second rotation defining portions of the shaft tube has a planar shape.

To achieve the above purpose, the first linings are further provided with a plurality of groove portions for accommodating the rolling members.

For the above purpose, the groove portions are arranged in parallel up and down, and the rolling member is a needle roller.

To achieve the above object, the rolling members are balls.

1‧‧‧ Front fork steering

10‧‧‧ frame tube

20‧‧‧External management

21‧‧‧First outer tube body

22‧‧‧Second outer tube body

23‧‧‧Outer tube taper

24‧‧‧First rotation limit

25‧‧‧Fixed blocks

251‧‧‧ screw holes

31‧‧‧First bearing

32‧‧‧second bearing

40‧‧‧ shaft tube

41‧‧‧Second rotation limit

42‧‧‧Fixed block

51‧‧‧First lining

52‧‧‧Rolling parts

53‧‧‧Slots

60‧‧‧Handle riser

70‧‧‧ front fork

81‧‧‧ Guide column

811‧‧‧stops

83‧‧‧Support ring seat

82‧‧‧Flexible components

91‧‧‧Second lining

100‧‧‧Special riser

The first figure is a perspective view of the structure of the bicycle front fork steering device in the present creation.

The second figure is a structural sectional view of the bicycle front fork steering device in the present creation.

The third figure is a structural exploded view of the shaft tube and bushing set in this creation.

The fourth figure is a schematic structural view of the bicycle front fork steering device in the present creation.

The fifth figure is another structural schematic diagram of the bicycle front fork steering device in the present creation.

The sixth figure is a schematic structural view of the bicycle front fork steering device in the present creation.

The seventh figure is a three-dimensional diagram of the structure of the steering mechanism in the creation.

The characteristics of this creation can be clearly understood by referring to the detailed description of the drawings and the examples.

The first figure is a structural perspective view of the bicycle front fork steering device, and the second figure is a structural sectional view of the bicycle front fork steering device. The bicycle front fork steering device 1 of the present invention includes at least: a frame tube 10. The outer tube 20, the first bearing 31, the shaft tube 40, and the bushing set.

The outer tube 20 is oppositely disposed inside the frame tube 10, and has first and second outer tube bodies 21 and 22 and an outer tube tapered portion 23, and the outer tube tapered portion 23 is connected to the first portion. Between the second outer tube bodies 21 and 22, the first outer tube body 21 has a smaller diameter than the second outer tube body 22. The first outer tube body 21 protrudes from the vehicle. The tube 10 is connected to the handle riser 60 of the bicycle, and the inner wall surface of the predetermined section of the second outer tube body 22 is provided with a plurality of first rotation defining portions 24; in practice, each first rotation defines The portion 24 may be a section extending along the axial direction of the outer tube 20. Please refer to the fourth diagram at the same time, and the cross section is planar. In addition, the The frame tube 10 is formed with a shielding tube portion 11 outside the tapered portion 23 of the outer tube, and the outer tube tapered portion 23 can be shielded to achieve an aesthetic effect; wherein the frame tube is integrated with the shielding tube portion Alternatively, or the frame tube and the shielding tube portion are assembled with each other.

The first bearing 31 is relatively sleeved between the frame tube 10 and the outer tube 20, and the first bearing 31 is located at the top end of the second outer tube body 22 and is opposite to the outer tube tapered portion 23 There is a second bearing 32, the second bearing 32 is relatively sleeved between the frame tube 10 and the outer tube 20, and the second bearing 32 is located at the bottom end of the frame tube 10.

The shaft tube 40 is oppositely disposed inside the outer tube 20 for connection with the bicycle front fork 70. The shaft tube 40 is disposed on the outer wall of the second outer tube body 22 opposite to each other. The second rotation defining portion 41 corresponding to the first rotation defining portion 24; in the implementation, each of the second rotation defining portions 41 may be a section extending along the axial direction of the shaft tube 40, please refer to the fourth figure at the same time. The cross section also forms a flat shape.

The first lining 51 is provided between the corresponding first rotation defining portion 24 and the second rotation defining portion 41, and the first lining is respectively provided. The sheet 51 is provided with a plurality of rolling elements 52. Each of the first linings 51 can be provided with a plurality of groove portions 53 for accommodating the rolling elements 52. The groove portions 53 are arranged in parallel up and down, and the rolling elements 52 are rolled. needle.

Basically, the front fork steering device of the present invention is mainly designed to restrict the relative rotation of the outer tube 20 and the shaft tube 40 through the first rotation defining portion 24 and the second rotation defining portion 41 between the outer tube 20 and the shaft tube 40. The purpose of guiding the front fork can be controlled by the handle of the bicycle; in particular, the front fork steering device uses the first lining 50 to reduce the contact gap between the outer tube 20 and the shaft tube 40 (the first rotation defining portion 24 and the second rotation) a gap between the defining portions 41), resulting in a more stable and reliable steering limit effect.

It is worth mentioning that the first and second bearings 31 and 32 of the present invention are disposed at the second outer tube body 22 of the outer tube, so that the first and second bearings 31 and 32 of the same size can be used. And this design can be applied to all the existing risers on the market by the design of the outer tube taper, without the need to design another mold.

Furthermore, the front fork steering device of the present invention further has a guide post 81 for restricting the relative sliding stroke of the shaft tube 40 and the outer tube 20, and the guide post 81 and the shaft tube 40 are further disposed in the shaft tube 40. An elastic member 82 for elastically restoring the outer tube 20 and the shaft tube 40 is provided between the outer tube 20 and the shaft tube 40, and the overall steering restriction device is combined with the shock absorbing effect in a relatively simple and reliable design.

In the embodiment, the outer tube 20 is provided with a fixing block 25 at an inner wall thereof above the shaft tube 40. The center of the fixing block 25 is provided with a screw hole 251, and the top end of the guiding rod 82 passes through the The shaft tube 40 is screwed to the screw hole 251 of the fixing block; the bottom end of the shaft tube 40 is screwed with a fixing block 42 for limiting the falling of the elastic member 82, and the column 81 is fastened near the bottom end. There is a support ring seat 83. The guide post 81 is provided with a stop portion 811 having an outer diameter larger than the through hole at a bottom end of the guide ring seat 83. The stop portion 811 is disposed above the elastic member 82. And is in contact with the elastic member 82.

According to the above structural design, when the shaft tube 40 and the outer tube 20 are relatively compressed, a cushioning and shock absorbing effect is formed, and a force for resetting the shaft tube 40 and the outer tube 20 is generated, and the force can be ensured. The shaft tube 40 is firmly engaged with the outer tube 20 to prevent the shaft tube 40 from being loosened from the outer tube 20.

Furthermore, a lining set is further provided. As shown in the third and fourth figures, the lining set is provided with a plurality of second linings 91, and each of the second linings 91 is respectively lined with a corresponding first rotation. Between the defining portion 24 and the first lining 41, by the design of the lining set, the wear of the outer tube caused by the axial displacement of each of the first linings can be reduced.

In addition, the second linings 91 of the lining group can also be respectively disposed between the corresponding second rotation defining portions 41 and the first linings 51. As shown in the embodiment of the fifth embodiment, the first linings can be reduced. The wear of the sheet 51 due to the axial displacement of the shaft tube 40; of course, as shown in the embodiment of the sixth embodiment, each of the second linings 91 can be simultaneously lined with the corresponding first rotation defining portion 24 and the first lining. Between the sheets 51, and between the corresponding second rotation defining portion 41 and the first lining 51, the rolling member 52 may also be a ball.

In summary, the present invention provides a preferred and feasible bicycle front fork steering device, and submits a new patent application according to law; the technical content and technical features of the present invention are disclosed above, but those skilled in the art may still be based on The disclosure of this creation is a variety of alternatives and modifications that do not depart from the spirit of the creation of this case. Therefore, the scope of the present invention is not limited to the embodiments disclosed, but includes various alternatives and modifications that do not depart from the present invention and are covered by the following claims.

1‧‧‧ Front fork steering

10‧‧‧ frame tube

20‧‧‧External management

21‧‧‧First outer tube body

22‧‧‧Second outer tube body

23‧‧‧Outer tube taper

25‧‧‧Fixed blocks

251‧‧‧ screw holes

31‧‧‧First bearing

32‧‧‧second bearing

40‧‧‧ shaft tube

42‧‧‧Fixed block

60‧‧‧Handle riser

81‧‧‧ Guide column

811‧‧‧stops

83‧‧‧Support ring seat

82‧‧‧Flexible components

Claims (14)

A bicycle front fork steering device includes at least: a frame tube; an outer tube oppositely disposed inside the frame tube, having a first and a second outer tube body and an outer tube tapered portion, The outer tube tapered portion is connected between the first and second outer tube bodies such that the first outer tube body has a smaller diameter than the second outer tube body, and the first outer tube body is Projecting on the frame tube and connected to the handle riser of the bicycle, and the inner wall surface of the predetermined section of the second outer tube body is provided with a plurality of first rotation defining portions; a first bearing, the opposite sleeve Between the frame tube and the outer tube, and the first bearing is located at the top of the second outer tube body and below the tapered portion of the outer tube; a shaft tube is oppositely disposed inside the outer tube For connecting to the front fork of the bicycle, the outer wall of the second outer tube body is oppositely disposed with a plurality of second rotation defining portions respectively corresponding to the first rotation defining portions; and the bushing group is provided with plural a first lining for respectively lining between the corresponding first rotation defining portion and the second rotation defining portion, and each first Sheet and is provided with a plurality of rolling elements. The bicycle front fork steering device according to claim 1, further comprising a lining set, wherein the lining set is provided with a plurality of second linings, the second linings respectively lining the corresponding first rotation Between the defined portion and the first lining. The bicycle front fork steering device according to claim 1, further comprising a lining set, wherein the lining set is provided with a plurality of second linings, wherein the second linings are respectively lined with corresponding second rotations Between the defined portion and the first lining. The bicycle front fork steering device of claim 3, wherein the second linings are respectively lined between the corresponding first rotation defining portion and the first lining. The bicycle front fork steering device according to any one of claims 1 to 4, wherein a second bearing is further disposed, the second bearing is relatively sleeved between the frame tube and the outer tube, and the first The second bearing is located at the bottom end of the frame tube. The bicycle front fork steering device according to any one of claims 1 to 4, wherein the frame tube is formed with a shielding tube portion outside the tapered portion of the outer tube, and the outer tube tapered portion can be shielded. The bicycle front fork steering device of claim 6, wherein the frame tube is integrally formed with the shielding tube portion. The bicycle front fork steering device according to claim 6, wherein the frame tube and the shielding tube portion are assembled with each other. The bicycle front fork steering device according to any one of claims 1 to 4, wherein the shaft tube is provided with a guide post for restricting a relative sliding stroke of the shaft tube and the outer tube, and the guide post and the guide post An elastic member for elastically restoring the outer tube and the shaft tube is disposed between the outer tubes. The bicycle front fork steering device of claim 9, wherein the outer tube is provided with a fixing block at an inner wall thereof above the shaft tube, and a center of the fixing block is provided with a screw hole, and the top end of the guiding rod Passing through the shaft tube and screwing with the screw hole; the bottom end of the shaft tube is screwed with a fixing block for limiting the falling of the elastic member; the guide column is provided with a support ring seat near the bottom end. The guide post and the bottom end of the through hole defined by the support ring seat are provided with a stop portion having an outer diameter larger than the through hole of the support ring, the stop portion is disposed at a position above the elastic member, and The elastic elements are in contact. The bicycle front fork steering device according to any one of claims 1 to 4, wherein each of the first rotation defining portions of the outer tube has a planar shape, and each of the second rotation defining portions of the shaft tube The section is flat. The bicycle front fork steering device according to any one of claims 1 to 4, wherein the first linings are further provided with a plurality of groove portions for accommodating the rolling members. The bicycle front fork steering device of claim 12, wherein the groove portions are arranged in parallel up and down, and the rolling member is a needle roller. The bicycle front fork steering device of claim 12, wherein the rolling member is a ball.