One-way damper and derailleur

Abstract

The invention discloses a one-way damper and discloses a derailleur with the one-way damper, the derailleur comprises a shell, a rotating shaft and a valve plate, and a cavity used for containing damping oil is formed in the shell; one end of the rotating shaft extends into the cavity, a limiting check block is arranged at one end of the rotating shaft, an oil passing channel is formed in the area, corresponding to the limiting check block, of the rotating shaft and the cavity, and the cavity is divided into a damping cavity and a return cavity with the oil passing channel as the boundary; one end of the valve plate is hinged to the rotating shaft, the rotating axis direction of the valve plate is parallel to that of the rotating shaft, damping oil in the damping cavity can drive the valve plate to abut against the limiting check block, and the other end of the valve plate seals the oil passing channel and applies damping force to the rotating shaft through the limiting check block. The limiting check block can provide large enough supporting force for the valve plate, so that the valve plate can seal the oil passing channel, the valve plate bears large enough damping force, the structural strength of the valve plate is large, and the whole one-way damper is good in damping effect and high in reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of bicycles, and particularly to a hydraulic rotary one-way damper and a derailleur having the same. Background Art

[0002] A one-way damper generates resistance only when moving in a specific direction, and has extremely small resistance or no damping during reverse movement. This characteristic is achieved through structures such as mechanical locking, fluid one-way valves, or friction plates. At present, in the hydraulic one-way damper, the fluid one-way valve structure or other sealing structures are prone to failure, enabling the damping oil in the two chambers to be easily interchanged, resulting in the failure of the damper function or a reduction in the damping effect. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a one-way damper with good damping effect and high reliability.

[0004] The present invention also provides a derailleur having the above one-way damper.

[0005] According to an embodiment of the first aspect of the present invention, the one-way damper includes a housing, a rotating shaft, and a valve plate. A chamber for containing damping oil is provided in the housing; one end of the rotating shaft extends into the chamber, a limiting block is provided at one end of the rotating shaft, and an oil passage is formed between the rotating shaft and the chamber in the area corresponding to the limiting block. The chamber is divided into a damping chamber and a return chamber with the oil passage as the boundary; one end of the valve plate is hinged to the rotating shaft, the rotational axis of the valve plate is parallel to the rotational axis of the rotating shaft, the damping oil in the damping chamber can drive the valve plate to abut against the limiting block, and the other end of the valve plate seals the oil passage and applies a damping force to the rotating shaft through the limiting block.

[0006] It has at least the following beneficial effects: The valve plate is hinged to the rotating shaft, and the limiting block abuts against the valve plate. The limiting block can provide a sufficient large supporting force to the valve plate, so that the valve plate can seal the oil passage, and further enable the damping oil in the damping chamber to apply a sufficient large damping force to the valve plate. The valve plate has a large structural strength and is not easily damaged, resulting in good damping effect and high reliability of the entire one-way damper.

[0007] According to some embodiments of the present invention, an elastic member is further included, and the elastic member is used to drive the valve plate to abut against the limiting block, so that the oil passage is in a normally closed state.

[0008] According to some embodiments of the present invention, one end of the valve plate is hinged to the rotating shaft via a pin, the elastic member is a torsion spring, the elastic member is sleeved on the pin, one end of the elastic member abuts against the outer wall of the rotating shaft or the limit block, and the other end of the elastic member abuts against the valve plate.

[0009] According to some embodiments of the present invention, the shell includes a bottom shell and a cap covering the bottom shell, a first partition is provided on the inner wall of the cap, the bottom shell, the cap and the first partition form the connected damping chamber and the return chamber, a mounting hole is provided on the bottom shell, the rotating shaft can be rotatably installed in the mounting hole, and the outer circular surface of one end of the rotating shaft abuts against the first partition to form a seal.

[0010] According to some embodiments of the present invention, the mounting hole is a stepped through hole, and a shaft shoulder is provided in the middle section of the rotating shaft, and the shaft shoulder abuts against a stepped surface of an inner wall of the mounting hole.

[0011] According to some embodiments of the present invention, a sealing ring is provided between the inner wall of the mounting hole and the rotating shaft.

[0012] According to some embodiments of the present invention, an annular limiting groove is provided on the inner wall of the mounting hole, and the sealing ring is installed in the limiting groove.

[0013] According to some embodiments of the present invention, a positioning shaft section is provided at an end of one end of the rotating shaft, and a positioning groove cooperating with the positioning shaft section is provided on an inner wall of the shell.

[0014] According to some embodiments of the present invention, a compensation chamber is provided in the return cavity, and an oil temperature compensator is provided in the compensation chamber.

[0015] The derailleur according to the second aspect of the present invention comprises a derailleur body and a one-way damper according to the first aspect of the present invention, wherein the shell is connected to the derailleur body, and the other end of the rotating shaft is transmission-connected to the chain guide of the derailleur body.

[0016] At least the following beneficial effects are achieved: The present derailleur has all the beneficial effects brought about by the above-mentioned one-way damper, which will not be described repeatedly here.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 Schematic diagram of the structure after hiding the housing in the embodiment of the present invention; Figure 3 Longitudinal sectional structure schematic diagram of the implementation of the present invention; Figure 4 Transverse sectional structure schematic diagram when the rotating shaft of the present invention rotates forward; Figure 5 Transverse sectional structure schematic diagram when the rotating shaft of the present invention rotates reversely; Figure 6 Schematic diagram of the structure of the housing in the embodiment of the present invention; Reference numerals in the drawings: Housing 100, bottom case 110, mounting hole 111, limiting groove 112, cap 120, first partition 121, positioning groove 122; Rotating shaft 200, limiting block 210, shaft shoulder 220, positioning shaft section 230; Oil passage 300; Damping chamber 400; Return chamber 500, compensation chamber 510; Valve plate 600; Elastic member 700; Pin shaft 800; Sealing ring 900. Detailed implementation manners

[0019] In the description of the present invention, it should be understood that for the orientation description, such as the upper, lower, front, rear, left, right, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present invention.

[0020] In the description of the present invention, if the first and second are described only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0022] Refer to Figures 1 to 3, the present invention discloses a one-way damper, which includes a housing 100, a rotating shaft 200 and a valve plate 600. The housing 100 is provided with a chamber for containing damping oil, and the housing 100 is used to fix the entire one-way damper; one end of the rotating shaft 200 extends into the chamber, a limiting block 210 is provided at one end of the rotating shaft 200, and an oil passage 300 is formed between the rotating shaft 200 and the chamber in the area corresponding to the limiting block 210. The chamber is divided into a damping chamber 400 and a return chamber 500 with the oil passage 300 as the boundary; the other end of the rotating shaft 200 extends to the housing 100, and the other end of the rotating shaft 200 is used to connect with an external rotating component.

[0023] One end of the valve plate 600 is hinged to the rotating shaft 200, the rotation axis of the valve plate 600 is parallel to the rotation axis of the rotating shaft 200, the damping oil in the damping chamber 400 can drive the valve plate 600 to abut against the limiting block 210, and the other end of the valve plate 600 seals the oil passage 300 and applies a damping force to the rotating shaft 200 through the limiting block 210.

[0024] When the one-way damper works, the oil passage 300, the damping chamber 400 and the return chamber 500 are all filled with damping oil. When the external rotating component rotates, refer to Figure 4 , when the rotating component wants to drive the rotating shaft 200 to rotate in the direction shown by the arrow (forward rotation), the valve plate 600 abuts against the limiting block 210, the other end of the valve plate 600 seals the oil passage 300, and the damping chamber 400 is in a relatively sealed state. At this time, the damping oil in the damping chamber 400 will tend to be compressed. Due to the incompressibility or little compressibility of the damping oil, the damping oil applies a damping force to the valve plate 600, and the valve plate 600 applies a reverse acting force to the rotating shaft 200 through the limiting block 210, and this reverse acting force will prevent the rotating shaft 200 from rotating in the direction shown by the arrow. And when a certain time has passed, the damping oil in the damping chamber 400 will flow to the return chamber 500 through the gap between the valve plate 600 and the rotating shaft 200 and the gap between the valve plate 600 and the inner wall of the chamber, realizing the slow pressure relief of the damping chamber 400, and then the rotating shaft 200 can rotate slowly along Figure 4 the direction shown by the arrow.

[0025] Refer to Figure 5 , when the rotating component wants to drive the rotating shaft 200 to rotate in the direction shown by the arrow (reverse rotation), behind the direction shown by the arrow, there is no component to push the valve plate 600, and the damping oil in the return chamber 500 will drive the other end of the valve plate 600 to swing towards the damping chamber 400. The other end of the valve plate 600 does not seal the oil passage 300, and the damping oil in the return chamber 500 will enter the damping chamber 400 through the oil passage 300, and the rotation of the rotating shaft 200 will not be subject to additional damping. In summary, the rotating shaft 200 of the one-way damper can realize one-way rotation resistance.

[0026] The valve plate 600 is hinged on the rotating shaft 200. The limit stop 210 abuts against the valve plate 600. The limit stop 210 can provide a large enough supporting force to the valve plate 600, so that the valve plate 600 can seal the oil passage 300. Furthermore, the damping oil in the damping chamber 400 can apply a large enough damping force to the valve plate 600. The valve plate 600 has a relatively large structural strength and is not easily damaged, resulting in a good damping effect and high reliability of the entire one-way damper.

[0027] The dimension of the limit stop 210 extending along the rotating shaft 200 is large, and the distance between the limit stop 210 and the inner wall of the housing 100 is small, making the cross-section of the oil passage 300 small. The area where the limit stop 210 can abut against the valve plate 600 is larger, so that the force applied by the limit stop 210 to the valve plate 600 is greater.

[0028] Refer to Figure 2 and Figure 3 In some embodiments, the one-way damper further includes an elastic member 700. The elastic member 700 is used to drive the valve plate 600 to abut against the limit stop 210, so that the oil passage 300 is in a normally closed state. That is, in the natural state, the other end of the valve plate 600 seals the oil passage 300, so that at the beginning, the forward rotation of the rotating shaft 200 is subject to a damping force, while the reverse rotation of the rotating shaft 200 is not subject to resistance.

[0029] In some embodiments, one end of the valve plate 600 is hinged to the rotating shaft 200 through a pin shaft 800. The pin shaft 800 is parallel to the rotating shaft 200. The valve plate 600 is rotatably mounted on the rotating shaft 200 through the pin shaft 800.

[0030] The elastic member 700 is a torsion spring. The elastic member 700 is sleeved on the pin shaft 800. One end of the elastic member 700 abuts against the outer wall of the rotating shaft 200 or the limit stop 210, and the other end of the elastic member 700 abuts against the valve plate 600. The pin shaft 800 serves to limit and mount the elastic member 700.

[0031] It can be understood that two first ear portions are provided at one end of the valve plate 600, and first pin holes are provided on both of the two first ear portions. Two second ear portions are provided on the outer surface of the rotating shaft 200, and second pin holes are provided on both of the two second ear portions. The two second pin holes and the two first pin holes are coaxially arranged. The two first ear portions are located between the two second ear portions. The pin shaft 800 sequentially passes through a second pin hole, two first pin holes, and the other second pin hole. The elastic member 700 is sleeved on the pin shaft 800 between the two first ear portions.

[0032] Refer to Figure 3 and Figure 4, in some of these embodiments, the housing 100 includes a bottom case 110 and a cap 120 covering the bottom case 110. A first partition 121 is provided on the inner wall of the cap 120. The bottom case 110, the cap 120, and the first partition 121 enclose a connected damping chamber 400 and a return chamber 500. The bottom case 110 and the cap 120 can be connected by welding or bonding to make there be no gap between the bottom case 110 and the cap 120, so as to avoid the damping oil filled in the chamber from leaking through the gap between the bottom case 110 and the cap 120.

[0033] Referring to Figure 3 , an installation hole 111 is provided on the bottom case 110. The rotating shaft 200 is rotatably installed in the installation hole 111. The outer circumferential surface of one end of the rotating shaft 200 abuts against the first partition 121 to form a seal, avoiding the chamber from forming an entire annular structure.

[0034] It can be conceived that the outer shape of the cap 120 is a rotating body. The cap 120 has a central axis. The cap 120, the installation hole 111, and the rotating shaft 200 are coaxially arranged. The first partition 121 coincides with a radius position of the cap 120. The first partition 121 and the cap 120 are of an integrally formed structure.

[0035] In some of these embodiments, the installation hole 111 is a stepped through hole, that is, the installation hole 111 has a large end and a small end. The diameter of the large end is larger than that of the small end. A step surface is formed between the large end and the small end. The step surface is perpendicular to the axis of the installation hole 111. The chamber, the large end, and the small end are connected in sequence. A shaft shoulder 220 is provided in the middle section of the rotating shaft 200. The shaft shoulder 220 abuts against the step surface on the inner wall of the installation hole 111. The shaft shoulder 220 and the step surface limit one end of the rotating shaft 200 in the chamber.

[0036] A connection hole is provided on the end surface of the other end of the rotating shaft 200. The cross-section of the connection hole is circular or regular polygon. Two mutually parallel planes are provided on the outer circumferential surface of the other end of the rotating shaft 200. The two planes are parallel to the rotating shaft 200. The distances from the two planes to the central axis of the rotating shaft 200 are equal.

[0037] Referring to Figure 2 and Figure 3 , in some of these embodiments, a sealing ring 900 is provided between the inner wall of the installation hole 111 and the rotating shaft 200. The sealing ring 900 seals the gap between the inner wall of the installation hole 111 and the rotating shaft 200, avoiding the damping oil from leaking through the gap between the inner wall of the installation hole 111 and the rotating shaft 200.

[0038] In some of these embodiments, an annular limiting groove 112 is provided on the inner wall of the installation hole 111. The sealing ring 900 is installed in the limiting groove 112. The limiting groove 112 serves to receive and limit the sealing ring 900.

[0039] Reference Figure 2 , Figure 3 and Figure 6 In some of the embodiments, a positioning shaft segment 230 is provided at the end of one end of the rotating shaft 200, and a positioning groove 122 cooperating with the positioning shaft segment 230 is provided on the inner wall of the shell 100, and the positioning shaft segment 230 extends into the positioning groove 122, and the side wall of the positioning groove 122 serves to center the positioning shaft segment 230 and the rotating shaft 200.

[0040] It can be understood that the shell 100, the positioning groove 122, the rotating shaft 200 and the positioning shaft section 230 are coaxially arranged, the cross-sections of the positioning shaft section 230 and the positioning groove 122 are both circular, and the diameter of the positioning shaft section 230 and the aperture of the positioning groove 122 are both smaller than the diameter of one end of the rotating shaft 200.

[0041] Reference Figures 4 to 6 In some of the embodiments, a compensation chamber 510 is provided in the return chamber 500, and an oil temperature compensator is provided in the compensation chamber 510, and the temperature compensator is used to balance the pressure of the damping oil in the chamber.

[0042] The inner wall of the cap 120 is provided with a second partition, a compensation chamber 510 is formed between the first partition 121 and the second partition, and a notch is provided on the second partition, the notch connects the return cavity 500 and the compensation chamber 510. The cap 120, the first partition 121 and the second partition are an integrally formed structure. The oil temperature compensator is a common component in the market, and no redundant introduction is made here.

[0043] The present invention also discloses a derailleur, including a derailleur body and the above-mentioned one-way damper, wherein the housing 100 is connected to the derailleur body, and the other end of the rotating shaft 200 is transmission-connected to the chain guide of the derailleur body, and the one-way damper causes greater damping to the one-way rotation of the chain guide.

[0044] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. One-way damper, characterized in that, Comprising: A housing (100) provided with a chamber for containing damping oil; A rotating shaft (200) with one end extending into the chamber. A limiting block (210) is provided at one end of the rotating shaft (200). An oil passage (300) is formed between the rotating shaft (200) and the chamber in the area corresponding to the limiting block (210). The chamber is divided into a damping chamber (400) and a return chamber (500) with the oil passage (300) as the boundary; A valve plate (600) with one end hinged to the rotating shaft (200). The rotation axis of the valve plate (600) is parallel to the rotation axis of the rotating shaft (200). The damping oil in the damping chamber (400) can drive the valve plate (600) to abut against the limiting block (210). The other end of the valve plate (600) seals the oil passage (300) and applies a damping force to the rotating shaft (200) through the limiting block (210).

2. The one-way damper according to claim 1, characterized in that, It further includes an elastic member (700) for driving the valve plate (600) to abut against the limiting block (210) so that the oil passage (300) is in a normally closed state.

3. The one-way damper according to claim 2, characterized in that, One end of the valve plate (600) is hinged to the rotating shaft (200) through a pin shaft (800). The elastic member (700) is a torsion spring. The elastic member (700) is sleeved on the pin shaft (800). One end of the elastic member (700) abuts against the outer wall of the rotating shaft (200) or the limiting block (210), and the other end of the elastic member (700) abuts against the valve plate (600).

4. The one-way damper according to claim 1, characterized in that, The housing (100) includes a bottom shell (110) and a cap (120) covering the bottom shell (110). A first partition (121) is provided on the inner wall of the cap (120). The bottom shell (110), the cap (120) and the first partition (121) enclose the connected damping chamber (400) and the return chamber (500). An installation hole (111) is provided on the bottom shell (110). The rotating shaft (200) is rotatably installed in the installation hole (111). The outer circumferential surface of one end of the rotating shaft (200) abuts against the first partition (121) to form a seal.

5. The one-way damper according to claim 4, characterized in that, The installation hole (111) is a stepped through hole. A shaft shoulder (220) is provided in the middle section of the rotating shaft (200). The shaft shoulder (220) abuts against the stepped surface on the inner wall of the installation hole (111).

6. The one-way damper according to claim 4 or 5, characterized in that, A sealing ring (900) is provided between the inner wall of the installation hole (111) and the rotating shaft (200).

7. The one-way damper according to claim 6, characterized in that, An annular limiting groove (112) is provided on the inner wall of the installation hole (111). The sealing ring (900) is installed in the limiting groove (112).

8. The one-way damper according to claim 1, wherein, A positioning shaft section (230) is provided at the end of one end of the rotating shaft (200). A positioning groove (122) cooperating with the positioning shaft section (230) is provided on the inner wall of the housing (100).

9. The one-way damper according to claim 1, characterized in that A compensation chamber (510) is opened in the return chamber (500). An oil temperature compensator is provided in the compensation chamber (510).

10. The derailleur is characterized in that, Including a derailleur body and the one-way damper according to any one of claims 1 to 9, the housing (100) is connected to the derailleur body, and the other end of the rotating shaft (200) is drivingly connected to the chain guide of the derailleur body.

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