A bottom valve assembly and air spring shock absorber having the same

Abstract

The application relates to the technical field of shock absorbers, in particular to a bottom valve assembly and an air spring shock absorber with the same. The bottom valve assembly comprises a floating valve, a pressure valve and an adjusting base. The floating valve comprises a floating valve body and a floating valve core. The pressure valve is arranged in the floating valve. The adjusting base is arranged at the lower end of an inner cylinder and is used for limiting the rotation range of the floating valve core. The adjusting base comprises a base shell, a base shaft, a reset assembly and a limiting device. The application further discloses an air spring shock absorber with the bottom valve assembly. The bottom valve assembly provides an integrated scheme of the floating valve and the pressure valve. At the initial moment of the movement of a piston rod, the floating valve acts to give a stable and extremely small damping feedback. After the movement of the floating valve is cut off, the pressure valve starts to act to give larger damping.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of shock absorbers, in particular to a bottom valve assembly and an air spring shock absorber with the same. BACKGROUND

[0002] With the development of the new energy automobile field, new requirements are put forward for the suspension system. Due to the increase in the weight of the new energy automobile battery, the weight of the new energy automobile is generally higher than that of the traditional fuel automobile, and the requirements for the stiffness, formation and damping adaptability of the shock absorber are higher. At present, the suspension system of the new energy automobile gradually transits from the technical scheme of the coil spring plus the shock absorber to the technical scheme of the air spring plus the shock absorber.

[0003] At present, a technical scheme of an air spring shock absorber is to set a floating valve (also called a compensation valve), and the core function is to realize dynamic multi-stage damping force characteristics in cooperation with a pressure valve, especially to solve the damping matching problem of the air spring system under the low-speed fine vibration working condition. The floating valve of the prior art has a limited volume, and the damping adjustment effect cannot be linearly adjusted, so a bottom valve integrating the floating valve and the pressure valve needs to be designed, and the floating valve can be conveniently adjusted. SUMMARY

[0004] The application discloses a bottom valve assembly arranged in an air spring shock absorber, wherein the air spring shock absorber at least comprises a piston cylinder, the piston cylinder comprises an inner cylinder, an outer cylinder and a bottom hole arranged at a lower edge of the inner cylinder and in communication with the outer cylinder.

[0005] The bottom valve assembly comprises a floating valve, a pressure valve and an adjusting base.

[0006] The floating valve comprises a floating valve body and a floating valve core.

[0007] The floating valve body comprises an annular base arranged at an inner wall of the inner cylinder above the bottom hole, an annular channel arranged in the annular base, a gas path partition plate arranged in the annular channel, an air inlet transverse channel arranged at one side of the gas path partition plate and in communication with the annular channel, an air inlet upper hole arranged above the air inlet transverse channel, an air outlet transverse channel arranged at the other side of the gas path partition plate and in communication with the annular channel, and an air outlet lower hole arranged below the air outlet transverse channel, and a annular groove is formed inward in the middle of the annular channel.

[0008] The floating valve core comprises a rotating circular ring rotatably arranged in the annular groove, a floating baffle arranged at the outer side of the rotating circular ring and in sliding cooperation with the annular channel, a plurality of radial connecting shafts evenly distributed on the inner wall of the rotating circular ring, a valve core middle shaft arranged at the end of the radial connecting shaft, and a transmission square shaft arranged below the valve core middle shaft.

[0009] The pressure valve comprises a circular base arranged in the annular base, a near through hole arranged on the left side of the circular base, a far through hole arranged on the right side of the circular base, an upper valve plate arranged above the circular base to shield the near through hole, and a lower valve plate arranged below the circular base to shield the far through hole, wherein a near end notch is arranged on the lower valve plate corresponding to the near through hole.

[0010] The adjusting base is arranged at the lower end of the inner cylinder to limit the rotation range of the floating valve core, and comprises a base shell, a base shaft, a reset assembly, and a limiting device.

[0011] The base shell comprises a connecting top plate, a columnar base arranged below the connecting top plate, an adjusting middle cavity arranged in the columnar base, a lower opening arranged at the lower end of the adjusting middle cavity, and an upper opening arranged at the upper end of the adjusting middle cavity.

[0012] The base shaft comprises a fixed bottom column arranged at the bottom of the adjusting middle cavity, a bottom column inner cavity arranged in the fixed bottom column and communicating with the lower opening, a plurality of communication side holes circumferentially and uniformly arranged on the outer wall of the bottom column inner cavity and communicating with the adjusting middle cavity, a column upper circular shaft arranged at the upper end of the fixed bottom column, a rotation stopping horizontal hole penetrating through the column upper circular shaft in the left-right direction, and a spring core shaft arranged at the bottom of the rotation stopping horizontal hole.

[0013] The reset assembly comprises a limiting upper shaft slidably arranged through the upper opening, a transmission square hole arranged above the limiting upper shaft and in transmission connection with the transmission square shaft, a driving disc arranged at the lower end of the limiting upper shaft and inserted into the adjusting middle cavity, a driving inclined block arranged below the driving disc, a sliding circular pipe slidably arranged on the inner wall of the adjusting middle cavity, a sliding circular ring arranged below the sliding circular pipe and sleeved on the column upper circular shaft, a circular hole square plate arranged in the sliding circular ring and sleeved on the spring core shaft, a driven inclined block arranged above the sliding circular ring and in abutment with the driving inclined block, and a reset compression spring arranged around the spring core shaft below the circular hole square plate.

[0014] The limiting device comprises an outer threaded rod rotatably arranged in the bottom column inner cavity, a torsion terminal arranged at the lower end of the outer threaded rod and penetrating through the lower opening, a sliding sleeve slidably sleeved on the outer wall of the fixed bottom column, and a plurality of driven connecting rods circumferentially and uniformly arranged on the inner wall of the sliding sleeve and in plug-in cooperation with the communication side holes, wherein the inner side of the driven connecting rods is provided with incomplete threads matched with the outer threaded rod; the driving inclined block gradually thickens in the counterclockwise direction, and the driven inclined block is adapted to the driving inclined block.

[0015] The improved design for the sealing performance includes but is not limited to the following:

[0016] A sealing ring is arranged between the torsion terminal and the lower opening.

[0017] The sealing ring is arranged between the limiting upper shaft and the upper opening.

[0018] The sealing ring is arranged between the limiting upper shaft and the upper opening.

[0019] The application further discloses an air spring shock absorber provided with the bottom valve assembly.

[0020] Advantages

[0021] The bottom valve assembly provides an integrated scheme of the floating valve and the pressure valve, the floating valve is actuated at the initial moment of the movement of the piston rod to give a stable and minimal damping feedback, and the pressure valve is actuated after the movement of the floating valve is cut off to give a larger damping.

[0022] The bottom valve assembly adopts the structure arrangement that the floating valve is arranged outside and the pressure valve is arranged inside, the annular channel of the floating valve provides a larger accommodation space for the floating valve core and provides a larger buffering amplitude for the initial moment of the movement of the piston rod in the inner cylinder.

[0023] The bottom valve assembly can also adjust the effective flow size of the floating valve to provide different damping tuning, and the adjustment mode is simple and direct operation of the exposed twist terminal can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic view of an embodiment of the air spring shock absorber.

[0025] Figure 2 is a schematic view of an embodiment of the bottom valve assembly.

[0026] Figure 3 is a schematic view of an embodiment of the floating valve body.

[0027] Figure 4 is a schematic view of an embodiment of the floating valve.

[0028] Figure 5 is a top view of an embodiment of the floating valve.

[0029] Figure 6 is a ring cut sectional view of an embodiment of the floating valve body (the cross section is taken along the trajectory circle A in the axial direction). Figure 5 The trajectory circle A is ring cut in the axial direction.

[0030] Figure 7 is a schematic view of an embodiment of the floating valve core.

[0031] Figure 8 is a schematic view of the first state of the floating valve body and the floating valve core.

[0032] Figure 9 is a schematic view of the floating valve body and the floating valve core in the second state.

[0033] Figure 10 is Figure 5 is a cross-sectional isometric view of the B-B section in the middle of the floating valve.

[0034] Figure 11 is a cross-sectional view of one embodiment of the base housing.

[0035] Figure 12 is a cross-sectional view of the adjusting base in the first state.

[0036] Figure 13 is a cross-sectional view of the adjusting base in the second state.

[0037] Figure 14 is a schematic view of one embodiment of the active inclined block.

[0038] in the figure:

[0039] 9. Piston cylinder, 91. inner cylinder, 92. outer cylinder, 93. bottom hole;

[0040] 1. Floating valve, 11. floating valve body, 111. annular base, 112. annular channel, 113. air passage partition, 114. inlet air horizontal channel, 115. inlet air upper hole, 116. outlet air horizontal channel, 117. outlet air lower hole, 118. annular groove;

[0041] 12. Floating valve core, 121. rotating ring, 122. floating baffle, 123. radial connecting shaft, 124. valve core central shaft, 125. transmission square shaft;

[0042] 2. Pressure valve, 21. circular base, 22. near through hole, 23. far through hole, 24. upper valve plate, 25. lower valve plate, 26. near end notch;

[0043] 3. Adjusting base;

[0044] 31. Base housing, 311. connecting top plate, 312. columnar base, 313. adjusting middle cavity, 314. lower opening, 315. upper opening;

[0045] 32. Base central shaft, 321. fixed bottom column, 322. bottom column inner cavity, 323. communicating side hole, 324. column upper circular shaft, 325. anti-rotation horizontal hole, 326. spring core shaft;

[0046] 33. Reset assembly, 331. limiting upper shaft, 332. transmission square hole, 333. active disc, 334. active inclined block, 335. sliding circular tube, 336. sliding circular ring, 337. circular hole square plate, 338. driven inclined block, 339. reset compression spring;

[0047] 34. Limiting device, 341. externally threaded rod, 342. torsion terminal, 343. sliding sleeve, 344. driven link. DETAILED DESCRIPTION

[0048] The present application discloses a bottom valve assembly arranged in an air spring shock absorber, the air spring shock absorber comprising at least a piston cylinder 9, the piston cylinder 9 comprising an inner cylinder 91, an outer cylinder 92, a bottom hole 93 arranged at a lower edge of the inner cylinder 91 and communicating with the outer cylinder 92;

[0049] The bottom valve assembly comprises a floating valve 1, a pressure valve 2, an adjusting base 3;

[0050] The floating valve 1 comprises a floating valve body 11, a floating valve core 12;

[0051] The floating valve body 11 comprises an annular base 111 arranged at an inner wall of the inner cylinder 91 above the bottom hole 93, an annular channel 112 arranged in the annular base 111, a gas passage partition plate 113 arranged in the annular channel 112, an air inlet transverse channel 114 arranged at one side of the gas passage partition plate 113 and communicating with the annular channel 112, an air inlet upper hole 115 arranged above the air inlet transverse channel 114, an air outlet transverse channel 116 arranged at the other side of the gas passage partition plate 113 and communicating with the annular channel 112, and an air outlet lower hole 117 arranged below the air outlet transverse channel 116, wherein a recess 118 is formed inwardly in a middle portion of the annular channel 112;

[0052] The floating valve core 12 comprises a rotating circular ring 121 rotatably arranged in the recess 118, a floating baffle 122 arranged at an outer side of the rotating circular ring 121 and slidingly fitted with the annular channel 112, a radial connecting shaft 123 circumferentially and uniformly arranged at an inner wall of the rotating circular ring 121, a valve core middle shaft 124 arranged at a stop end of the radial connecting shaft 123, and a transmission square shaft 125 arranged below the valve core middle shaft 124;

[0053] The pressure valve 2 comprises a circular base 21 arranged in the annular base 111, a proximal through hole 22 arranged at a left side of the circular base 21, a distal through hole 23 arranged at a right side of the circular base 21, an upper valve plate 24 arranged above the circular base 21 to shield the proximal through hole 22, and a lower valve plate 25 arranged below the circular base 21 to shield the distal through hole 23, wherein a proximal end notch 26 is arranged on the lower valve plate 25 corresponding to the proximal through hole 22;

[0054] The adjusting base 3 is arranged at a lower end of the inner cylinder 91 to limit a rotation range of the floating valve core 12, and the adjusting base 3 comprises a base shell 31, a base middle shaft 32, a reset assembly 33, and a limiting device 34;

[0055] The base shell 31 comprises a connecting top plate 311, a columnar base 312 arranged below the connecting top plate 311, an adjusting middle cavity 313 arranged inside the columnar base 312, a lower opening 314 arranged at the lower end of the adjusting middle cavity 313, and an upper opening 315 arranged at the upper end of the adjusting middle cavity 313;

[0056] The base middle shaft 32 comprises a fixed bottom column 321 arranged at the bottom of the adjusting middle cavity 313, a bottom column inner cavity 322 arranged inside the fixed bottom column 321 and communicating with the lower opening 314, a communication side hole 323 circumferentially and uniformly arranged on the outer wall of the bottom column inner cavity 322 and communicating with the adjusting middle cavity 313, a column upper circular shaft 324 arranged at the upper end of the fixed bottom column 321, a rotation stopping horizontal hole 325 penetrating through the column upper circular shaft 324 in the left-right direction, and a spring core shaft 326 arranged at the bottom of the rotation stopping horizontal hole 325;

[0057] The reset assembly 33 comprises a limiting upper shaft 331 slidably arranged through the upper opening 315, a transmission square hole 332 arranged above the limiting upper shaft 331 and in transmission connection with the transmission square shaft 125, a driving disc 333 arranged at the lower end of the limiting upper shaft 331 and inserted into the adjusting middle cavity 313, a driving inclined block 334 arranged below the driving disc 333, a sliding circular tube 335 slidably arranged on the inner wall of the adjusting middle cavity 313, a sliding circular ring 336 arranged below the sliding circular tube 335 and sleeved on the column upper circular shaft 324, a circular hole square plate 337 arranged inside the sliding circular ring 336 and sleeved on the spring core shaft 326, a driven inclined block 338 arranged above the sliding circular ring 336 and in abutment with the driving inclined block 334, and a reset compression spring 339 arranged around the spring core shaft 326 below the circular hole square plate 337;

[0058] The limiting device 34 comprises an outer threaded rod 341 rotatably arranged in the bottom column inner cavity 322, a torsion terminal 342 arranged at the lower end of the outer threaded rod 341 and arranged through the lower opening 314, a sliding sleeve 343 slidably sleeved on the outer wall of the fixed bottom column 321, and a driven connecting rod 344 circumferentially and uniformly arranged on the inner wall of the sliding sleeve 343 and in plug-in cooperation with the communication side hole 323, wherein the inner side of the driven connecting rod 344 is provided with an incomplete thread matched with the outer threaded rod 341; the driving inclined block 334 gradually thickens in the counterclockwise direction, and the driven inclined block 338 is adapted to the driving inclined block 334.

[0059] The improved design for the sealing performance includes but is not limited to:

[0060] A sealing ring is arranged between the torsion terminal 342 and the lower opening 314.

[0061] A sealing ring is arranged between the limiting upper shaft 331 and the upper opening 315.

[0062] The sealing ring is arranged between the outer wall of the limiting upper shaft 331 and the upper opening 315.

[0063] The application further discloses an air spring shock absorber provided with the bottom valve assembly.

[0064] The floating valve 1 can provide a small damping buffer during the initial period of the up-and-down movement of the inner cylinder 91, and the pressure valve 2 starts to act after the buffer is released.

[0065] The working principle of the floating valve 1 is as follows:

[0066] As shown in the accompanying drawings of the specification: Figure 8

[0067] When the piston rod descends, the oil pressure above the floating valve 1 increases, the oil enters the annular channel 112 through the air inlet upper hole 115 and the air inlet horizontal channel 114, and acts on the floating baffle 122 to drive the entire floating valve element 12 to rotate counterclockwise, and the above process has a weak flow interception effect due to the large caliber of the air inlet upper hole 115 and the air inlet horizontal channel 114, so that the piston rod receives very small damping in the process.

[0068] As shown in the accompanying drawings of the specification: Figure 9

[0069] When the piston rod ascends, the oil pressure above the floating valve 1 decreases, the oil enters the annular channel 112 through the air outlet lower hole 117 and the air outlet horizontal channel 116, and acts on the floating baffle 122 to drive the entire floating valve element 12 to rotate clockwise, and the above process has a weak flow interception effect due to the large caliber of the air outlet lower hole 117 and the air outlet horizontal channel 116, so that the piston rod receives very small damping in the process.

[0070] The floating valve 1 can adjust the rotation amplitude of the floating valve element 12, and further adjust the effective action flow of the floating valve 1.

[0071] Firstly, in the action process of the floating valve 1, the reset assembly 33 acts as follows:

[0072] The floating baffle 122 drives the rotating ring 121, the radial connecting shaft 123, the valve element middle shaft 124 and the transmission square shaft 125 to rotate, the transmission square shaft 125 acts on the transmission square hole 332 to drive the limiting upper shaft 331, the driving disc 333 and the driving inclined block 334 to rotate, the driving inclined block 334 acts on the driven inclined block 338 to drive the sliding circular pipe 335, the sliding circular ring 336 and the circular hole square plate 337 to overcome the damping of the reset compression spring 339 and descend downward until the sliding circular ring 336 abuts against the sliding sleeve 343.

[0073] ​​Then, the limiting device 34 can limit the rotation amplitude of the floating valve core 12 by limiting the displacement amplitude of the reset assembly 33, and the specific method is as follows:

[0074] As shown in the accompanying drawings of the specification Figure 12 、 13 , rotate the torsion terminal 342, the external threaded rod 341 drives the driven link 344, the sliding sleeve 343 goes up, the height position of the sliding sleeve 343 affects the displacement amplitude of the reset assembly 33 and the rotation amplitude of the floating valve core 12, and finally realizes the adjustment of the effective action flow of the floating valve 1.

Claims

1. A bottom valve assembly disposed within an air spring shock absorber, the air spring shock absorber comprising at least a piston cylinder (9), the piston cylinder (9) comprising an inner cylinder (91), an outer cylinder (92), and a bottom hole (93) disposed at the lower edge of the inner cylinder (91) and communicating with the outer cylinder (92), characterized in that: The bottom valve assembly includes a floating valve (1), a pressure valve (2), and an adjusting base (3); The floating valve (1) includes a floating valve body (11) and a floating valve core (12). The floating valve body (11) includes an annular base (111) located above the bottom hole (93) on the inner wall of the inner cylinder (91), an annular channel (112) located in the annular base (111), an air passage baffle (113) located in the annular channel (112), an air inlet cross passage (114) located on one side of the air passage baffle (113) and connected to the annular channel (112), an upper air inlet hole (115) located above the air inlet cross passage (114), an air outlet cross passage (116) located on the other side of the air passage baffle (113) and connected to the annular channel (112), and a lower air outlet hole (117) located below the air outlet cross passage (116). An annular groove (118) is formed inward in the middle of the annular channel (112). The floating valve core (12) includes a rotatable rotating ring (121) disposed in the annular groove (118), a floating baffle (122) disposed outside the rotating ring (121) and slidingly engaged with the annular channel (112), a radial connecting shaft (123) evenly distributed on the inner wall of the rotating ring (121), a valve core central shaft (124) disposed at the stop end of the radial connecting shaft (123), and a transmission square shaft (125) disposed below the valve core central shaft (124). The pressure valve (2) includes a circular base (21) located within the annular base (111), a near through hole (22) located on the left side of the circular base (21), a far through hole (23) located on the right side of the circular base (21), an upper valve plate (24) located above the circular base (21) to block the near through hole (22), and a lower valve plate (25) located below the circular base (21) to block the far through hole (23). The lower valve plate (25) has a proximal notch (26) corresponding to the near through hole (22). The adjusting base (3) is located at the lower end of the inner cylinder (91) to limit the rotation amplitude of the floating valve core (12).

2. The bottom valve assembly according to claim 1, characterized in that: The adjustment base (3) includes a base shell (31), a base central shaft (32), and a reset assembly (33); The base shell (31) includes a connecting top plate (311), a columnar base (312) disposed below the connecting top plate (311), an adjustment cavity (313) disposed inside the columnar base (312), a lower opening (314) disposed at the lower end of the adjustment cavity (313), and an upper opening (315) disposed at the upper end of the adjustment cavity (313). The base shaft (32) includes a fixed base column (321) disposed at the bottom of the adjustment cavity (313), a base column inner cavity (322) disposed in the fixed base column (321) and communicating with the lower opening (314), a communicating side hole (323) evenly distributed on the outer wall of the base column inner cavity (322) and communicating with the adjustment cavity (313), a column-mounted round shaft (324) disposed at the upper end of the fixed base column (321), a lateral anti-rotation hole (325) disposed through the column-mounted round shaft (324) in the left and right direction, and a spring spindle (326) disposed at the bottom of the lateral anti-rotation hole (325). The reset assembly (33) includes a slidable upper limiting shaft (331) that passes through the upper opening (315), a transmission square hole (332) located above the upper limiting shaft (331) and connected to the transmission square shaft (125), an active disk (333) located at the lower end of the upper limiting shaft (331) and inserted into the adjustment cavity (313), an active inclined block (334) located below the active disk (333), and a sliding circle slidably located on the inner wall of the adjustment cavity (313). The tube (335), the sliding ring (336) located below the sliding round tube (335) and sleeved on the cylindrical shaft (324), the square plate with a round hole located inside the sliding ring (336) and sleeved on the spring spindle (326), the driven inclined block (338) located above the sliding ring (336) and abutting against the active inclined block (334), and the reset spring (339) located below the square plate with a round hole on the spring spindle (326). The adjustment base (3) also includes a limiting device (34) for limiting the range of motion of the reset assembly (33). The limiting device (34) includes a rotatable external thread rod (341) disposed in the inner cavity (322) of the base column, a torsion terminal (342) disposed at the lower end of the external thread rod (341) and passing through the lower opening (314), a sliding sleeve (343) slidably sleeved on the outer wall of the fixed base column (321), and a driven connecting rod (344) circumferentially distributed on the inner wall of the sliding sleeve (343) and inserted into the communicating side hole (323). The inner side of the driven connecting rod (344) is provided with an incomplete thread that mates with the external thread rod (341).

3. A bottom valve assembly according to claim 2, characterized in that: A sealing ring is provided between the torsion terminal (342) and the lower opening (314).

4. A bottom valve assembly according to claim 3, characterized in that: A sealing ring is provided between the upper limiting shaft (331) and the upper opening (315).

5. A bottom valve assembly according to claim 4, characterized in that: A sealing ring is provided between the outer wall of the limiting upper shaft (331) and the upper opening (315).

6. A bottom valve assembly according to claim 5, characterized in that: The active inclined block (334) gradually thickens downwards in a counterclockwise direction, and the driven inclined block (338) is adapted to the active inclined block (334).

7. An air spring shock absorber, characterized in that: The device is equipped with a bottom valve assembly as described in any one of claims 1-6.

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