High-strength center shaft bowl set for bicycle

Abstract

The utility model relates to the technical field of bicycle accessories, in particular to a high-strength center shaft bowl group for a bicycle, which comprises a lower retaining bowl, a lower bearing, a support tube, a limit ring, a bolt and a transmission component, the tip end of the lower retaining bowl is integrally connected with a vertical tube, and a plurality of internal threaded tubes are arranged on the vertical tube. The lower bearing is located in the lower blocking bowl. A plurality of side grooves are formed in the arc face of the supporting pipe, and limiting plates rotationally connected with the side grooves are arranged in the side grooves. The limiting ring is located on the inner side of the supporting pipe, and an upper bearing is arranged on the limiting ring in the supporting pipe. The bolts are rotationally connected with the supporting pipe, and each bolt is in spiral connection with the internal thread pipe on the corresponding side. The transmission assembly is in transmission connection with all the bolts so as to drive all the bolts to rotate synchronously in the state that any bolt is driven to rotate. The lower blocking bowl, the vertical pipe, the supporting pipe and the limiting plate are adopted to form a complete structure that the upper bowl and the lower bowl are matched with each other, the number of spare parts and installation procedures are reduced, and the whole bowl set is easy and convenient to connect with a bicycle.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle accessories, in particular to a high-strength mid-axle bowl set for bicycles. Background Art

[0002] A bicycle bottom bracket headset is primarily used to connect the bicycle's front fork tube to the bicycle frame's front tube, allowing the front of the bicycle to flexibly drive the front fork tube to rotate within the frame's front tube, thereby achieving functions such as front wheel forward steering. Traditional bottom bracket headsets consist of a lower retaining bowl, lower bearing, lower retaining ring, upper retaining bowl, upper bearing, upper retaining ring, and gland. Each component is independent before installation, requiring installation to be completed one by one, which is time-consuming and labor-intensive.

[0003] The technical solution disclosed in the Chinese patent with authorization announcement number CN214493223U is provided with an installation mechanism, a lubrication mechanism and a multifunctional reinforcement layer, which can facilitate better installation, more secure positioning, and is not prone to falling off. It can also facilitate better lubrication operations, with a more excellent lubrication effect, less prone to leakage, and increased strength of the device. It is not easy to be damaged and has a longer service life.

[0004] However, this device still has some shortcomings: the bowl set has many separate structures, and the upper and lower bowls and the upper and lower bearings need to be assembled one by one, which is time-consuming and labor-intensive during actual installation. Utility Model Content

[0005] The utility model aims to solve the problems existing in the background technology and to provide a high-strength mid-axle headset for a bicycle.

[0006] The technical solution of the utility model is a high-strength bottom bracket bowl set for bicycles, comprising a lower bowl, the tip of which is integrally connected to a seat tube, and a plurality of internally threaded tubes are arranged in a ring array around the axis of the seat tube at one end away from the lower bowl.

[0007] The lower bearing is located in the lower retaining bowl and fits with its inner wall.

[0008] The support tube has a plurality of side grooves arranged in a ring array around its axis on its arc surface, and a limit plate rotatably connected to the side groove is arranged in the side groove. The limit plate is perpendicular to the body of the support tube in the expanded state.

[0009] The limiting ring is located on the inner side of the support tube and is coaxially connected to the inner wall of the support tube. An upper bearing coaxial with the limiting ring is provided in the support tube.

[0010] Bolts are rotatably connected to the support tube. The bolts are distributed in a ring array around the axis of the support tube. Each bolt is inserted into the internal threaded tube on the corresponding side and spirally connected thereto.

[0011] And a transmission assembly, which drives and connects the bolts so as to drive all the bolts to rotate synchronously when any one bolt is driven to rotate.

[0012] Preferably, an annular groove coaxial with the vertical pipe is provided on the arc-shaped outer wall thereof, an elastic anti-slip sleeve coaxial with the vertical pipe is provided in the annular groove, and the inner diameter of the elastic anti-slip sleeve gradually increases inward along the openings at both ends.

[0013] Preferably, a coaxial pressure ring is provided in the annular groove, and the pressure ring fits with the upper end surface of the elastic anti-slip sleeve. A plurality of vertical rods are provided on the pressure ring in a circular array around its axis. The vertical rods pass through the upper wall of the annular groove and are integrally connected to the support tube.

[0014] Preferably, the length of the side groove along the radial direction of the support tube is greater than the length of the limiting plate, and when the limiting plate is in a fully expanded state, the upper surface of the limiting plate is in contact with the upper wall of the side groove.

[0015] Preferably, the transmission assembly includes gears and an outer gear ring, each gear is coaxially connected to the bolt on the corresponding side, the gear is rotatably connected to the support tube, the outer gear ring is sleeved on the outer wall of the limiting ring and rotates coaxially with it, and each gear is meshed with the outer gear ring.

[0016] Preferably, a plurality of countersunk holes are arranged in a circular array around the axis on the upper end surface of the support tube, and the top cover of each bolt is respectively inserted into the countersunk hole on the corresponding side and is slidably connected to the inner wall thereof. A spline is provided on the inner wall of the through hole of the gear, and a keyway is provided on the bolt along its radial direction. The spline is inserted into the keyway and is slidably connected to the same.

[0017] Preferably, the bottom of the lower retaining bowl is connected to the lower tight ring, the end of the support tube away from the lower retaining bowl is connected to the upper tight ring, and a pressure cover is sleeved on the outside of the limit plate and the upper tight ring on the support tube.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] By setting a matching structure of the lower baffle bowl, vertical tube, support tube and limit plate, and the lower bearing and upper bearing are pre-installed in the lower baffle bowl and support tube respectively, the number of parts and the installation process during actual operation are reduced, and the limit plate can be folded and stored. When installing, it can be stored into the side groove, and the support tube can be passed upward along the bottom of the frame shaft hole. After the front end of the support tube extends out of the frame shaft hole, the limit plate is unfolded to form a limiting structure of the upper baffle bowl. The distance between the limit plate and the lower baffle bowl can be adjusted by turning the bolt, which is convenient for locking the device. At the same time, the utility model sets a matching structure of the gear and the outer gear ring, which is convenient for driving all the other bolts to rotate synchronously in the same direction when rotating any one bolt, reducing the amount of operation while also allowing the support tube to always keep its end face equidistant from the end face of the lower baffle bowl. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0021] Figure 2 Schematic diagram of the connection structure between the lower baffle bowl and the support tube;

[0022] Figure 3 Schematic diagram of the connection structure of the components on the lower baffle bowl;

[0023] Figure 4 Schematic diagram of the connection structure between each bolt and the transmission component.

[0024] Figure numerals: 1. Lower retaining bowl; 2. Vertical tube; 201. Annular groove; 3. Elastic anti-slip sleeve; 4. Pressure ring; 5. Vertical pole; 6. Internally threaded tube; 7. Lower bearing; 8. Lower tight ring; 9. Support tube; 91. Side groove; 92. Countersunk hole; 10. Limit plate; 11. Limit ring; 12. Upper bearing; 13. Bolt; 131. Keyway; 14. Gear; 15. External gear ring; 16. Upper tight ring; 17. Pressure cover. DETAILED DESCRIPTION

[0025] Example 1

[0026] like Figures 1-4As shown, the present invention provides a high-strength bicycle bottom bracket headset assembly, comprising a lower retaining bowl 1, a lower bearing 7, a support tube 9, a retaining ring 11, and a transmission assembly. The tip of the lower retaining bowl 1 is integrally connected to the seat tube 2. Several internally threaded tubes 6 are arranged in a circular array around the axis of the seat tube 2 at the end of the seat tube 2 away from the lower retaining bowl 1. The lower bearing 7 is located within the lower retaining bowl 1 and engages with its inner wall. Several side grooves 91 are arranged in a circular array around the axis of the support tube 9 on its curved surface. Retaining plates 10 are rotatably connected to the side grooves 91 within these grooves. When extended, the retaining plates 10 are perpendicular to the main body of the support tube 9. The radial length of the side grooves 91 along the support tube 9 is greater than the length of the retaining plates 10. When fully extended, the upper surface of the retaining plates 10 engages with the upper wall of the side grooves 91. The retaining ring 11 is located inside the support tube 9 and coaxially connected to its inner wall. An upper bearing 12 is coaxially disposed within the retaining ring 11 within the support tube 9. Bolts 13 are rotatably connected to the support tube 9. Bolts 13 are arranged in a circular array around the axis of the support tube 9. Each bolt 13 is inserted into the corresponding internally threaded tube 6 and threadedly connected thereto. The transmission assembly includes gears 14 and an external gear ring 15. Each gear 14 is coaxially connected to the corresponding bolt 13 and is rotatably connected to the support tube 9. The external gear ring 15 is sleeved on the outer wall of the retaining ring 11 and rotates coaxially therewith. Each gear 14 meshes with the external gear ring 15. The upper end surface of the support tube 9 is provided with a plurality of countersunk holes 92 in a circular array around its axis. The top caps of each bolt 13 are respectively inserted into the countersunk holes 92 on the corresponding side and slidably connected with the inner wall thereof. A spline is provided on the inner wall of the through hole of the gear 14, and a keyway 131 is provided along its radial direction on the bolt 13. The spline is inserted into the keyway 131 and slidably connected with the inner wall thereof. Under this structure, if the headset structure becomes loose after the bicycle is used for a long time, turning the screw on the top cap of the bicycle front fork shaft can reduce the distance between the lower retaining bowl 1 and the support tube 9 by sliding the sunflower disc. The bottom of the lower retaining bowl 1 is connected to the lower pressing ring 8, and the end of the support tube 9 away from the lower retaining bowl 1 is connected to the upper pressing ring 16. The support tube 9 is provided with a pressure cap 17 on the outside of the limit plate 10 and the upper pressing ring 16.

[0027] In this embodiment, before the device is installed on the bicycle, the lower bearing 7 is pre-installed in the lower retaining bowl 1, and the upper bearing 12 is pre-installed in the support tube 9 and in contact with the retaining ring 11. The retaining plate 10 is retained in the side groove 91. The remaining components are loose. During installation, the support tube 9 is first inserted upward along the bottom of the bicycle frame's axle hole until the side hole 91 is exposed from the top of the axle hole. Each support plate 10 is then flipped over to unfold it. Then, any bolt 13 is rotated. The rotation of the bolt 13 drives all bolts 13 to rotate synchronously and in the same direction through the transmission of the gear 14 and the external gear ring 15. The bolts 13 gradually penetrate into the corresponding internal threaded tube 6, thereby reducing the distance between the support plate 10 and the lower retaining bowl 1, thereby tightening the headset. The lower tightening ring 8, upper tightening ring 16, and pressure cap 17 are then installed. For removal, the above steps can be reversed. Since the number of loose components is reduced, the entire headset assembly is simple and convenient to disassemble.

[0028] Example 2

[0029] like Figure 1-Figure 3 As shown, the high-strength bicycle bottom bracket headset proposed by the present invention, compared to the first embodiment, has a coaxial annular groove 201 disposed on the curved outer wall of the seat tube 2. A coaxial elastic anti-slip sleeve 3 is disposed within the annular groove 201, with the inner diameter of the elastic anti-slip sleeve 3 gradually increasing inward along the two end openings. A coaxial pressure ring 4 is disposed within the annular groove 201, affixing to the upper end surface of the elastic anti-slip sleeve 3. A plurality of vertical rods 5 are disposed in an annular array around the axis of the pressure ring 4. The vertical rods 5 extend through the upper wall of the annular groove 201 and are integrally connected to the support tube 9.

[0030] In this embodiment, when the distance between the support tube 9 and the lower retaining bowl 1 is shrinking, the vertical rod 5 squeezes the pressure ring 4, and then squeezes the elastic anti-slip sleeve 3 through the pressure ring 4. The elastic anti-slip sleeve gradually expands outward and then presses against the inner wall of the axle hole on the bicycle frame, which has a good anti-slip effect on the entire bowl set, preventing the bowl set from rotating relative to the bicycle frame, and thus avoiding high temperature and wear caused by free sliding.

[0031] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A high-strength bicycle bottom bracket headset, characterized in that: include A lower retaining bowl (1), the tip of the lower retaining bowl (1) is integrally connected to a vertical pipe (2), and a plurality of internally threaded tubes (6) are provided in a circular array around the axis of the vertical pipe (2) at one end away from the lower retaining bowl (1); A lower bearing (7), the lower bearing (7) is located in the lower retaining bowl (1) and fits in contact with the inner wall thereof; A support tube (9) is provided with a plurality of side grooves (91) in a ring array around the axis of the support tube (9) on the arc surface thereof, and a limit plate (10) is provided in the side groove (91) and is rotatably connected thereto, and the limit plate (10) is perpendicular to the body of the support tube (9) in an unfolded state; A limiting ring (11), the limiting ring (11) is located on the inner side of the support tube (9) and is coaxially connected to the inner wall thereof, and an upper bearing (12) coaxial with the limiting ring (11) is provided inside the support tube (9); Bolts (13), the bolts (13) are rotatably connected to the support tube (9), the bolts (13) are distributed in a circular array around the axis of the support tube (9), and the bolts (13) are respectively inserted into the internal threaded tube (6) on the corresponding side and spirally connected thereto; And a transmission assembly, which transmits and connects the bolts (13) so as to drive all the bolts to rotate synchronously when any one of the bolts (13) is driven to rotate.

2. The high-strength bicycle bottom bracket headset according to claim 1, characterized in that: A coaxial annular groove (201) is provided on the arc-shaped outer wall of the vertical pipe (2), and a coaxial elastic anti-slip sleeve (3) is provided in the annular groove (201). The inner diameter of the elastic anti-slip sleeve (3) gradually increases inward along the openings at both ends.

3. The high-strength bicycle bottom bracket headset according to claim 2, characterized in that: A coaxial pressure ring (4) is provided in the annular groove (201), and the pressure ring (4) is in contact with the upper end surface of the elastic anti-slip sleeve (3). A plurality of vertical rods (5) are provided on the pressure ring (4) in an annular array around its axis. The vertical rods (5) penetrate the upper wall of the annular groove (201) and are integrally connected to the support tube (9).

4. The high-strength bicycle bottom bracket headset according to claim 1, characterized in that: The length of the side groove (91) in the radial direction of the support tube (9) is greater than the length of the limiting plate (10), and when the limiting plate (10) is in a fully expanded state, its upper surface is in contact with the upper wall of the side groove (91).

5. The high-strength bicycle bottom bracket headset according to claim 1, characterized in that: The transmission assembly includes a gear (14) and an outer gear ring (15). Each gear (14) is coaxially connected to a bolt (13) on a corresponding side. The gear (14) is rotationally connected to the support tube (9). The outer gear ring (15) is sleeved on the outer wall of the limiting ring (11) and rotates coaxially therewith. Each gear (14) is meshed with the outer gear ring (15).

6. The high-strength bicycle bottom bracket headset according to claim 5, characterized in that: A plurality of countersunk holes (92) are provided on the upper end surface of the support tube (9) in an annular array around its axis. The top cover of each bolt (13) is respectively inserted into the countersunk hole (92) on the corresponding side and is slidably connected to the inner wall thereof. A spline is provided on the inner wall of the through hole of the gear (14). A keyway (131) is provided on the bolt (13) along its radial direction. The spline is inserted into the keyway (131) and is slidably connected to the inner wall thereof.

7. The high-strength bicycle bottom bracket headset according to claim 1, characterized in that: The bottom of the lower retaining bowl (1) is connected to the lower pressing ring (8), the end of the support tube (9) away from the lower retaining bowl (1) is connected to the upper pressing ring (16), and a pressure cover (17) is sleeved on the outside of the limit plate (10) and the upper pressing ring (16) on the support tube (9).

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