CN114542647A

CN114542647A - Valve train assembly for shock absorber and shock absorber with same

Info

Publication number: CN114542647A
Application number: CN202011362339.8A
Authority: CN
Inventors: 蒋柏林; 汪林青; 李军洁; 袁延羽; 王刚
Original assignee: BYD Co Ltd; Huizhou BYD Battery Co Ltd
Current assignee: BYD Co Ltd; Huizhou BYD Battery Co Ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2022-05-27

Abstract

The invention discloses a valve system component for a shock absorber and the shock absorber with the same, wherein the valve system component comprises: the mounting piece is provided with an oil through hole and comprises a shaft part and a head part, the head part is positioned at one axial end of the shaft part, and the shaft part comprises a threaded rod section; the valve plate group comprises a plurality of valve plates, and the valve plates are sequentially sleeved on the shaft part; the stress supporting sheet is sleeved on the shaft part and is positioned on one side of the valve plate group away from the head part; the nut is sleeved on the shaft part and is positioned on one side, far away from the valve plate group, of the stress supporting sheet, and the nut is in threaded fit with the threaded rod section so that the stress supporting sheet compresses the valve plate group. The valve system component can be reliably pressed and fixed, avoids loosening and improves the reliability after assembly to a certain extent.

Description

Valve train assembly for shock absorber and shock absorber with same

Technical Field

The invention relates to the technical field of shock absorbers, in particular to a valve train assembly for a shock absorber and the shock absorber with the valve train assembly.

Background

In the valve system component of the shock absorber in the related art, the valve system component is mainly fixed in a pressing riveting friction mode through the elastic sheet and the mounting bolt, and then the elastic sheet compresses the valve plates, but the fixing mode easily causes the valve system component to have the phenomena of loose assembly and failure assembly, and further influences the reliability of the valve system component after assembly.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to provide a valve train assembly for a shock absorber, which can be reliably press-fitted and prevented from loosening, and which improves the reliability after assembly to some extent.

The invention also provides a shock absorber which comprises the valve system assembly.

A valve train assembly for a shock absorber according to an embodiment of the present invention includes: the mounting piece is provided with an oil through hole and comprises a shaft part and a head part, the head part is positioned at one axial end of the shaft part, and the shaft part comprises a threaded rod section; the valve plate group comprises a plurality of valve plates, and the valve plates are sequentially sleeved on the shaft part; the stress supporting sheet is sleeved on the shaft part and is positioned on one side of the valve plate group away from the head part; the nut is sleeved on the shaft part and is positioned on one side, far away from the valve plate group, of the stress supporting sheet, and the nut is in threaded fit with the threaded rod section so that the stress supporting sheet compresses the valve plate group.

According to the valve train assembly for the shock absorber, the stress supporting sheet is sleeved on the shaft part and located on one side, far away from the head part, of the valve plate set through the arrangement of the stress supporting sheet and the nut, the nut is sleeved on the shaft part and located on one side, far away from the valve plate set, of the stress supporting sheet, and the nut is in threaded fit with the threaded rod section so that the stress supporting sheet presses the valve plate set. Therefore, the valve system component can be reliably pressed and fixed and prevented from loosening, the reliability of the assembled valve system component is improved to a certain extent, and the reliability of the structure of the valve system component in the working process is improved. Meanwhile, the valve system component is simple, reliable and easy to operate in a mode of pressing, loosening and fixing.

According to some embodiments of the invention, the shaft portion further comprises: the polished rod section is positioned on one side, close to the head, of the threaded rod section, and the valve disc group is matched with the polished rod section.

In some embodiments of the invention, both ends of the polished rod section extend to the head and the threaded rod section, respectively, and the axial length of the polished rod section is 3.5mm to 4 mm.

According to some embodiments of the invention, the stress supporting sheet has an orthographic projection area greater than or equal to that of the nut, and smaller than that of the valve plate group, in projection to a plane perpendicular to the axial direction of the shaft portion.

According to some embodiments of the invention, the stress support sheet is one or a plurality of stacked stress support sheets, and the sum of the thicknesses of all the stress support sheets is 0.4mm-0.8 mm.

According to some embodiments of the invention, the head has a limit stop thereon adapted to cooperate with a tool to prevent rotation of the mount when the threaded shank segment is engaged with the nut.

In some embodiments of the invention, the rotation-restricting structure is configured as a groove formed on the head portion, the groove being open in a direction away from the shaft portion, the groove having a non-circular cross-section.

According to some embodiments of the invention, the loosening torque of the valve train assembly is 1.5N · m or less, the tightening torque of the nut is 2N · m-3N · m, and the nut has a nominal diameter of 3mm and a thread pitch of 0.5 mm.

A shock absorber according to an embodiment of the present invention includes: the first piston part comprises a first valve seat and a second valve seat, the second valve seat is matched with the first valve seat to define a valve cavity, and a matching shaft hole communicated with the valve cavity is formed in the first valve seat; one end of the connecting rod is inserted into the matching shaft hole, and an oil liquid channel communicated with the valve cavity is formed in the connecting rod; the valve system assembly is arranged in the valve cavity and is the valve system assembly according to the embodiment of the invention, and the oil through hole is communicated with the valve cavity.

According to the shock absorber provided by the embodiment of the invention, the valve system assembly is arranged, so that the valve system assembly can be reliably pressed and fixed, looseness is avoided, the reliability of the valve system assembly after assembly is improved to a certain extent, and the working reliability of the shock absorber is improved.

According to some embodiments of the invention, the shock absorber further comprises: the filter screen is arranged in the matching shaft hole and/or the valve cavity, and in the flowing direction of oil, the filter screen is positioned at the downstream of the oil passage and at the upstream of the oil through hole.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a cross-sectional view of a valve train assembly according to some embodiments of the present invention;

FIG. 2 is a cross-sectional view of a mount according to some embodiments of the invention;

FIG. 3 is a schematic view of a nut according to some embodiments of the invention;

FIG. 4 is a schematic view of a shock absorber according to some embodiments of the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 4;

FIG. 6 is a cross-sectional view of a first piston portion according to some embodiments of the present invention;

FIG. 7 is a cross-sectional view of a first valve seat according to some embodiments of the present invention;

FIG. 8 is a schematic view of a first valve seat according to some embodiments of the invention;

FIG. 9 is a cross-sectional view of a second valve seat according to some embodiments of the present invention;

FIG. 10 is a schematic view of a second valve seat according to some embodiments of the invention.

Reference numerals:

100. a shock absorber;

10. a valve train assembly;

1. a mounting member; 11. oil passing through holes; 12. a shaft portion; 121. a threaded rod section; 122. a polished rod segment; 13. a head portion; 131. a limiting rotation stopping structure;

2. a valve plate set;

3. a stress support sheet;

4. a nut;

a. a first valve plate; b. a gasket; c. a second valve plate; d. a support valve plate;

20. a first piston portion;

5. a first valve seat; 51. matching the shaft hole; 52. a support boss; 53. a flow oil hole;

6. a second valve seat; 61. assembling a groove;

7. a valve cavity;

30. a connecting rod; 301. an oil passage; 40. a filter screen; 50. a second piston portion; 60. a normally open valve plate;

70. a through-flow valve plate; 701. a through-flow aperture; 80. a seal ring; 90. a support plate assembly.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A valve train assembly 10 for a shock absorber 100 in accordance with an embodiment of the present invention is described below with reference to fig. 1-3, wherein shock absorber 100 may be used in an automobile.

As shown in FIG. 1, a valving assembly 10 for a shock absorber 100 in accordance with an embodiment of the present invention comprises: the valve plate comprises a mounting piece 1, a valve plate group 2, a stress support sheet 3 and a nut 4.

Specifically, as shown in fig. 1-2, the mounting member 1 is formed with an oil through hole 11, the mounting member 1 includes a shaft portion 12 and a head portion 13, the head portion 13 is located at one axial end of the shaft portion 12, and the shaft portion 12 includes a threaded rod segment 121. The valve plate set 2 comprises a plurality of valve plates, and the valve plates are sequentially sleeved on the shaft part 12. The stress supporting piece 3 is sleeved on the shaft portion 12 and is located on one side of the valve plate group 2 far away from the head portion 13. The nut 4 is sleeved on the shaft portion 12 and located on one side of the stress supporting piece 3 away from the valve plate set 2, and the nut 4 is in threaded fit with the threaded rod section 121, so that the stress supporting piece 3 presses the valve plate set 2 tightly.

From this, it is understood that the shaft portion 12 is provided with the plurality of valve sheets of the valve sheet group 2, the stress supporting sheet 3, and the nut 4 in this order in the direction from the head portion 13 of the mounting member 1 to the shaft portion 12. By means of the threaded engagement of the nut 4 with the threaded rod section 121, the stressing support plate 3 can be pressed effectively against the valve disk stack 2 by means of the nut 4. Further, the valve system assembly 10 can be reliably pressed and fixed to avoid looseness, the reliability of the valve system assembly 10 after assembly is improved to a certain extent, and the structural reliability of the valve system assembly 10 during operation is improved. Meanwhile, the valve system assembly 10 is simple, reliable and easy to operate in a pressing, anti-loosening and fixing mode. It can be understood that, in order to improve the anti-loose locking effect of the valve train assembly 10 after the nut 4 and the threaded rod segment 121 are matched, anti-loose glue can be coated on the nut 4 and the threaded rod segment 121 during assembly, and the anti-loose glue can be industrial anti-loose glue.

As is known, in the assembly process of the valve train assembly 10, stress is generated between the valve plates in the valve plate group 2, so that in the valve train assembly 10 according to the embodiment of the present invention, the stress support sheet 3 is disposed, so as to effectively absorb the stress generated between the valve plates, thereby improving the structural reliability of the valve train assembly 10 during operation.

According to the valve train assembly 10 for the shock absorber 100 of the embodiment of the invention, the stress supporting sheet 3 is sleeved on the shaft portion 12 and located on one side of the valve plate group 2 far away from the head portion 13 by arranging the stress supporting sheet 3 and the nut 4, the nut 4 is sleeved on the shaft portion 12 and located on one side of the stress supporting sheet 3 far away from the valve plate group 2, and the nut 4 is in threaded fit with the threaded rod section 121, so that the stress supporting sheet 3 presses the valve plate group 2. Therefore, the valve system assembly 10 can be reliably pressed and fixed and prevented from loosening, the reliability of the valve system assembly 10 after assembly is improved to a certain extent, and the structural reliability of the valve system assembly 10 during operation is improved. Meanwhile, the valve system assembly 10 is simple, reliable and easy to operate in a pressing, anti-loosening and fixing mode.

As shown in fig. 1 and 2, according to some embodiments of the invention, shaft portion 12 further comprises: and a polish rod section 122, wherein the polish rod section 122 is positioned on one side of the threaded rod section 121 close to the head 13, and the valve plate group 2 is matched with the polish rod section 122. This makes it possible to provide the shaft portion 12 with a simple and reliable structure. It is known that the valve train assembly 10 of the present embodiment can be assembled by the threaded rod segment 121 and the nut 4 to effectively press the stress supporting piece 3 against the valve plate set 2. Therefore, it can be understood that the plurality of valve plates in the valve plate group 2 and the stress support sheet 3 can be sleeved on the portion of the light rod section 122. The arrangement of the polish rod section 122 is beneficial to improving the sealing effect between the polish rod section 122 and the plurality of valve plates and between the polish rod section 122 and the stress supporting sheet 3, effectively preventing part of oil from flowing through the gaps between the polish rod section 122 and the plurality of valve plates and between the stress supporting sheets 3 when the valve system assembly 10 works to influence the damping effect generated when the shock absorber 100 works, and further improving the reliability of the valve system assembly 10. It can be understood that the outer peripheral wall of the polish rod segment 122 is smooth relative to the outer peripheral wall of the threaded rod segment 121, thereby facilitating the sleeving of the valve plates and the stress supporting piece 3 on the shaft portion 12.

As shown in FIG. 2, in some embodiments of the present invention, the polished rod segment 122 extends from both ends to the head 13 and the threaded rod segment 121, respectively, and the axial length of the polished rod segment 122 is 3.5mm to 4 mm. Therefore, the uniformity and reasonability of the distribution of all structures in the valve system assembly 10 can be ensured, and the reliability of the structure of the valve system assembly 10 after assembly can be further ensured. Optionally, the optical rod segment 122 has an axial length of 3.53mm to 3.99 mm. Optionally, the optical rod segment 122 has an axial length of 3.55mm to 3.94 mm. It will be appreciated that the axial length of the polished rod segment 122 is designed to be determined in conjunction with the overall thickness of the various structures in the valve train assembly 10, so long as the reliability of the valve train assembly 10 after assembly is ensured.

According to some embodiments of the present invention, the area of the stress supporting sheet 3 projected to a plane perpendicular to the axial direction of the shaft portion 12 is equal to or larger than the area of the nut 4 projected forward, and the area of the stress supporting sheet 3 projected forward is smaller than the area of the valve plate group 2 projected forward. Therefore, the orthographic projection area of the nut 4 is smaller than that of the stress support sheet 3, the orthographic projection area of the stress support sheet 3 is smaller than that of the valve block group 2, and therefore after the nut 4 is in threaded fit with the threaded rod section 121, the stress support sheet 3 can be effectively extruded, the stress support sheet 3 can effectively press the valve block group 2, the valve block group 10 can be reliably pressed and fixed and prevented from loosening, the reliability of the valve block group 10 after being assembled is improved to a certain extent, and the reliability of the structure of the valve block group 10 during working is improved.

According to some embodiments of the present invention, the stress support sheet 3 is one or a plurality of stacked stress support sheets, and the sum of the thicknesses of all the stress support sheets 3 is 0.4mm to 0.8 mm. It will be appreciated that the thickness setting of the stress-bearing sheet 3 will need to be determined in conjunction with the overall thickness of the valve train assembly 10 and the length of the portion of the shaft portion 12 of the mounting member 1 from which the threaded shank segment 121 has been removed. Whereby the structural reliability of the valve train assembly 10 can be ensured.

As shown in fig. 1 and 2, according to some embodiments of the invention, head 13 has a rotation limiting stop 131 thereon, the rotation limiting stop 131 being adapted to cooperate with a tool to prevent rotation of mounting member 1 when threaded shank segment 121 is engaged with nut 4. Therefore, the arrangement of the limiting rotation stopping structure 131 facilitates the threaded matching between the nut 4 and the threaded rod segment 121, facilitates the disassembly of the nut 4 and the threaded rod segment 121, and further improves the assembly and disassembly efficiency of the valve system assembly 10.

In some embodiments of the invention, as shown in fig. 2, the rotation-limiting detent 131 is configured as a groove formed in the head portion 13, the groove being open in a direction away from the shaft portion 12, the groove being non-circular in cross-section. Therefore, the limiting rotation-stopping structure 131 is convenient to produce and manufacture, and meanwhile, the non-circular groove is formed in the cross section, so that the limiting rotation-stopping structure 131 is convenient to match with a tool, the phenomenon that the limiting rotation-stopping structure 131 rotates relative to the tool when the threaded rod section 121 is matched with the nut 4 due to the fact that the inner peripheral wall of the groove is smooth is avoided, the reliability of the limiting rotation-stopping structure 131 is improved, and the assembly and disassembly efficiency of the valve system assembly 10 is improved. Optionally, the cross section of the groove is a regular hexagon, and the depth of the groove is 1mm-1.5 mm. Further, during assembly and disassembly of the valve train assembly 10, an operator may use a tool of hexagonal socket design, such as a hexagonal socket wrench, to extend the hexagonal socket wrench into the recess defined by the rotation limiting stop 131 to prevent rotation of the mounting member 1. Meanwhile, the arrangement of the cross section shape of the groove facilitates the production and the manufacture of the limiting and rotation stopping structure 131, is beneficial to improving the production efficiency of the valve system assembly 10, and reduces the production difficulty and the production cost of the valve system assembly 10. Meanwhile, the tool sources correspondingly matched with the grooves formed by the limiting rotation stopping structure 131 are wide, and special customization is not needed. It should be noted that the cross section of the groove may be formed in other shapes as long as the reliability of the rotation limiting and stopping structure 131 is ensured. For example, the cross section of the groove may be formed in a quincunx shape, and the depth of the groove may be 1mm to 1.5 mm. Therefore, the sources of tools correspondingly matched with the grooves formed by the limiting rotation stopping structure 131 are wide, and special customization is not needed.

According to some embodiments of the present invention, the loosening torque of the valve train assembly 10 is 1.5N · m or less, the tightening torque of the nut 4 is 2N · m-3N · m, and the nominal diameter of the nut 4 is 3mm and the pitch is 0.5 mm. Therefore, the fastening torque of the nut 4 is obviously greater than the loosening torque of the valve train assembly 10, so that the nut 4 can be effectively locked on the threaded rod section 121, and the stress support sheet 3 can effectively press the valve plate group 2, so that the valve train assembly 10 can be reliably pressed and fixed and prevented from loosening, the reliability of the valve train assembly 10 after being assembled is improved to a certain extent, and the reliability of the structure of the valve train assembly 10 during working is improved.

While the nominal diameter and the pitch of the nut 4 are chosen such that the size of the nut 4 is relatively small, the threaded shank portion 121, which is in threaded engagement with the nut 4, needs to be adapted in size to the nut 4, so that the threaded shank portion 121 is also relatively small in size. Further, the size of the shaft portion 12 can be designed to be relatively small, so that the sizes of the holes for sleeving the valve plate group 2 sleeved on the shaft portion 12 and the holes for sleeving the stress support sheet 3 can be set to be relatively small, and further, the support areas of the valve plate group 2 and the stress support sheet 3 can be relatively large, so that the force arm is relatively large in the working process of the valve system assembly 10, and the damping effect of the shock absorber 100 can be favorably improved.

As shown in fig. 1 to 10, a shock absorber 100 according to an embodiment of the present invention includes: a first piston portion 20, a connecting rod 30 and a valve train assembly 10.

Specifically, as shown in fig. 4 to 6, the first piston portion 20 includes a first valve seat 5 and a second valve seat 6, the second valve seat 6 cooperates with the first valve seat 5 to define the valve chamber 7, and the first valve seat 5 is formed with a cooperating shaft hole 51 communicating with the valve chamber 7. One end of the connecting rod 30 is inserted into the fitting shaft hole 51, and an oil passage 301 communicating with the valve chamber 7 is formed in the connecting rod 30. The valve train assembly 10 is disposed in the valve chamber 7, and the valve train assembly 10 is the valve train assembly 10 according to the above embodiment of the present invention, and the oil through hole 11 communicates with the valve chamber 7.

Therefore, when the shock absorber 100 operates, oil can flow into the valve cavity 7 through the oil passage 301, and since the oil through hole 11 is communicated with the valve cavity 7, the oil can flow through the oil through hole 11, so that the first piston portion 20 can generate damping.

It will also be appreciated that, since the connecting rod 30 is inserted into the fitting shaft hole 51 of the first valve seat 5, the valve train assembly 10 should be sealingly fitted to the first valve seat 5 when the shock absorber 100 is assembled in order to ensure the damping effect of the first piston portion 20.

According to the shock absorber 100 of the embodiment of the invention, by arranging the valve train assembly 10 of the embodiment of the invention, the valve train assembly 10 can be reliably pressed and fixed, looseness can be avoided, the reliability of the valve train assembly 10 after assembly can be improved to a certain extent, and the reliability of the shock absorber 100 during operation can be improved.

As shown in fig. 4-6, according to some embodiments of the present invention, the shock absorber 100 further includes a filter screen 40, the filter screen 40 is disposed in the matching shaft hole 51 and/or the valve chamber 7, and the filter screen 40 is located downstream of the oil passage 301 and upstream of the oil through hole 11 in the oil flowing direction. Therefore, the filter screen 40 can filter the oil flowing to the valve train assembly 10, so that the cleanliness of the oil flowing to the valve train assembly 10 is improved, and the cleanliness of the oil flowing to the oil through hole 11 is improved. Given the high cleanliness requirements of valve train assembly 10 during operation, filter screen 40 is advantageously positioned to prevent valve train assembly 10 from failing due to cleanliness. It is also known that a plurality of orifices are formed in the filter screen 40, so that the arrangement of the filter screen 40 can effectively improve the effect of the throttle damping by the shock absorber 100. It should be noted that, in the embodiment of the present invention, the filtering net 40 is detachable, and the mesh number of the filtering net 40 is adjustable, so that when the shock absorber 100 is used in different models of automobiles, the mesh number of the filtering net 40 can be adjusted by replacing the filtering net 40 according to the requirement of damping the shock absorber 100. For example, the mesh number of the filtering net 40 may be set as follows:

number of meshes	Precision/mum	Number of meshes	Precision/mum
				650	21	1300	11
800	19	1600	10
				900	15	1800	8
1100	13	2000	6.5

Note that the accuracy in the above table refers to the diameter of each orifice in the filter screen 40. It will thus be appreciated that the greater the mesh size of the filter screen 40, the greater the accuracy, i.e. the smaller the orifice, the greater the damping produced by the filter screen 40 under the same conditions.

As shown in fig. 6 and 7, in some embodiments of the present invention, the filter screen 40 is disposed in the fitting shaft hole 51, and the inner peripheral wall of the fitting shaft hole 51 is provided with a supporting protrusion 52, and the supporting protrusion 52 is limited on a side of the filter screen 40 away from the connecting rod 30. Therefore, the filter screen 40 can be supported on the supporting protrusion 52, and the filter screen 40 is located between the supporting protrusion 52 and the connecting rod 30, so that the connecting rod 30 can be stopped against the filter screen 40, the filter screen 40 can be positioned, and meanwhile, the oil flowing into the valve cavity 7 from the oil passage 301 can be effectively filtered.

Alternatively, one end of the connecting rod 30 is screw-fitted into the fitting shaft hole 51, and the pitch of the screw thread on the connecting rod 30 is different from the pitch of the screw thread on the inner peripheral wall of the fitting shaft hole 51. Therefore, the connecting rod 30 is inserted into the matching shaft hole 51 in a simple, reliable and convenient manner. Meanwhile, the pitch of the thread on the connecting rod 30 is different from that of the thread on the inner peripheral wall of the matching shaft hole 51, so that the reliability of stably inserting and matching the connecting rod 30 in the matching shaft hole 51 is improved. In the use process of the shock absorber 100, the connecting rod 30 and the first valve seat 5 are prevented from loosening to a certain extent, and therefore the reliability of the shock absorber 100 is improved. It will of course be appreciated that the improved level of precision of the threads in the threaded engagement further improves the reliability of shock absorber 100.

As shown in fig. 5, 6, 9 and 10, according to some embodiments of the present invention, a side of the second valve seat 6 away from the first valve seat 5 is provided with a fitting groove 61, a cross-section of the fitting groove 61 is formed in a polygonal shape, and a depth of the fitting groove 61 is 7mm to 10 mm. So that an operator can easily insert a tool into the fitting groove 61 to apply a moment to the second valve seat 6 to engage the second valve seat 6 with the first valve seat 5. Meanwhile, it can be understood that the depth of the assembling groove 61 is 7mm-10mm, so that the structural strength of the second valve seat 6 at the position where the assembling groove 61 is arranged can be ensured to a certain extent, and the moment applicable to the assembling groove 61 can be relatively large.

Optionally, the first valve seat 5 is in threaded engagement with the second valve seat 6. Thus, the operator can apply torque through the fitting groove 61 using a tool, thereby securely engaging the first valve seat 5 with the second valve seat 6. Alternatively, the pitch of the thread on the peripheral wall of the first valve seat 5 is different from the pitch of the thread on the second valve seat 6. Therefore, the stability and the reliability of the threaded fit of the first valve seat 5 and the second valve seat 6 can be improved, and looseness between the first valve seat 5 and the second valve seat 6 in the use process of the shock absorber 100 is avoided to a certain extent. It will of course be appreciated that the improved level of precision of the threads in the threaded engagement further improves the reliability of shock absorber 100.

Alternatively, as shown in fig. 10, the fitting groove 61 is formed in a regular hexagonal shape in cross section in the axial direction of the mount 1. When the first valve seat 5 and the second valve seat 6 are assembled and disassembled, an operator can use a tool with an internal hexagonal structure, such as an internal hexagonal wrench, to extend the internal hexagonal wrench into the assembly groove 61, and then apply a force to rotate the second valve seat 6, so that the second valve seat 6 can be fitted to the first valve seat 5 or the first valve seat 5 and the second valve seat 6 can be disengaged. Meanwhile, it can be understood that the arrangement of the cross-sectional shape of the assembling groove 61 facilitates the production and manufacture of the assembling groove 61, is beneficial to improving the production efficiency of the shock absorber 100, and reduces the production difficulty and the production cost of the shock absorber 100. Meanwhile, the tool corresponding to the assembling groove 61 is wide in source and does not need to be specially customized.

As shown in fig. 4 and 5, in some embodiments of the present invention, the shock absorber 100 further includes a second piston portion 50, one end of the connecting rod 30 passes through the center of the second piston portion 50 to be inserted into the mating shaft hole 51, and the second piston portion 50 may be used for vibration absorption. Therefore, when the shock absorber 100 operates, the second piston portion 50 and the second piston portion 50 can generate damping at the same time, and the damping effect can be achieved.

The structure of shock absorber 100 in accordance with one embodiment of the present invention is described in detail below with reference to fig. 1-10. However, it should be noted that the following description is only exemplary, and it is obvious that a person skilled in the art after reading the following technical solutions of the present invention can combine, replace, modify the technical solutions or some technical features thereof, and this also falls into the protection scope of the present invention.

As shown in fig. 4 and 5, a shock absorber 100 according to an embodiment of the present invention includes: a first piston portion 20, a second piston portion 50, a valve train assembly 10, a connecting rod 30 and a filter screen 40.

Specifically, as shown in fig. 5 to 10, the first piston portion 20 includes a first valve seat 5 and a second valve seat 6, the second valve seat 6 is screw-engaged with the first valve seat 5 to define a valve chamber 7, and the first valve seat 5 is formed with an engaging shaft hole 51 communicating with the valve chamber 7. One end of the connecting rod 30 passes through the center of the second piston portion 50 to be inserted into the fitting shaft hole 51, and specifically, the connecting rod 30 is screw-fitted into the fitting shaft hole 51. The pitch of the thread on the outer peripheral wall of the first valve seat 5 is different from the pitch of the thread on the second valve seat 6, and the pitch of the thread on the connecting rod 30 is different from the pitch of the thread on the inner peripheral wall of the engagement shaft hole 51. The second valve seat 6 is provided with an assembling groove 61 at one side far away from the first valve seat 5, the cross section of the assembling groove 61 is formed into a regular hexagon, and the depth of the assembling groove 61 is 7mm-10 mm. The valve train assembly 10 is disposed in the valve chamber 7 and is in sealing engagement with the first valve seat 5. The inner peripheral wall of the fitting shaft hole 51 is provided with a support protrusion 52, the filter screen 40 is supported on the support protrusion 52, and one end of the connecting rod 30 is stopped against the filter screen 40. The connecting rod 30 is formed with an oil passage 301 communicating with the valve chamber 7, and the filter screen 40 is located downstream of the oil passage 301 and upstream of the oil through hole 11 in the flow direction of the oil. The first valve seat 5 is formed with oil flow holes 53 having a large cross-sectional area without throttling to ensure that oil in the first piston portion 20 can flow out through the oil flow holes 53.

As shown in fig. 1-3, the valve train assembly 10 includes: the valve plate comprises a mounting piece 1, a valve plate group 2, a stress support sheet 3 and a nut 4.

Specifically, the mounting member 1 is formed with an oil through hole 11, and the oil through hole 11 is communicated with the valve cavity 7. The mounting member 1 is formed as a bolt, and specifically the mounting member 1 includes a shaft portion 12 and a head portion 13, the head portion 13 is located at one axial end of the shaft portion 12, the shaft portion 12 includes a threaded rod segment 121 and a polished rod segment 122, the polished rod segment 122 is located between the head portion 13 and the threaded rod segment 121, and the axial length of the polished rod segment 122 is 3.5mm-4 mm. The valve plate set 2 includes a plurality of valve plates, which are sequentially sleeved on the shaft portion 12 and are matched with the polish rod section 122. The stress supporting piece 3 is sleeved on the shaft portion 12 and is located on one side of the valve plate group 2 far away from the head portion 13. The nut 4 is sleeved on the shaft portion 12 and located on one side of the stress supporting piece 3 away from the valve plate set 2, and the nut 4 is in threaded fit with the threaded rod section 121, so that the stress supporting piece 3 presses the valve plate set 2 tightly. Head 13 has a rotation stop limit structure 131 thereon, the rotation stop limit structure 131 being adapted to cooperate with a tool to prevent rotation of the mounting member 1 when the threaded shank section 121 is engaged with the nut 4. The rotation-limiting stopper 131 is configured as a groove formed on the head portion 13, the groove being open in the direction away from the shaft portion 12, the cross section of the groove being a regular hexagon, and the depth of the groove being 1mm to 1.5 mm. And projecting to a plane vertical to the axial direction of the shaft part 12, wherein the orthographic projection area of the stress supporting sheet 3 is more than or equal to that of the nut 4, and the orthographic projection area of the stress supporting sheet 3 is less than that of the valve plate group 2. The stress support sheet 3 is one and the thickness of the stress support sheet 3 is 0.4mm-0.8 mm. It will be appreciated that the thickness setting of the stress-bearing sheet 3 needs to be determined in conjunction with the overall thickness of the valve train assembly 10 and the length of the stem segment 122. Whereby the structural reliability of the valve train assembly 10 can be ensured.

Specifically, as shown in fig. 1, the valve train assembly 10 further includes a first valve sheet a, a spacer b, a second valve sheet c and a support valve sheet d located between the valve sheet group 2 and the head 13 of the mounting member 1, and the first valve sheet a, the spacer b, the second valve sheet c and the support valve sheet d are sequentially sleeved on the light rod section 122 in a direction from the head 13 to the valve sheet group 2.

Specifically, the loosening torque of the valve train assembly 10 is 1.5N · m or less, the tightening torque of the nut 4 is 2N · m to 3N · m, the nominal diameter of the nut 4 is 3mm, and the pitch is 0.5 mm.

Specifically, as shown in FIG. 6, shock absorber 100 further includes a normally-open plate 60, a flow plate 70, a seal ring 80, and a backup plate assembly 90. The through-flow flap 70 is located between the first valve seat 5 and the second valve seat 6. The through-flow valve plate 70, the sealing ring 80 and the support sheet assembly 90 are positioned in the valve cavity 7 and at one end of the valve system assembly 10 far away from the first valve seat 5, and the through-flow valve plate 70, the sealing ring 80 and the support sheet assembly 90 are sequentially arranged in the direction far away from the first valve seat 5. The support sheet assembly 90 is supported on the inner bottom wall of the second valve seat 6, the sealing ring 80 is sealed between the through-flow valve plate 70 and the support sheet assembly 90, a support hole is provided at the center of the through-flow valve plate 70, the mounting member 1 is supported on the through-flow valve plate 70, and at least a part of the head 13 of the mounting member 1 is located in the support hole. It is known that the thickness of the flow valve plate 70 affects the damping energy efficiency of the shock absorber 100 at high frequencies, and in general, the thickness of the flow valve plate 70 is conventionally set to be 0.2mm, 0.25mm, 0.3mm, 0.35mm or 0.4mm in combination with the damping energy efficiency ratio of the shock absorber 100, although it is understood that the specific size of the thickness of the flow valve plate 70 can be selected in combination with the application. The through-flow valve plate 70 is provided with a through-flow hole 701, and after entering the valve cavity 7, oil can flow through the through-flow hole 701 and finally flow out of the valve system assembly 10, wherein the flow area of the through-flow hole 701 is larger than that of working flow. For example, the flow valve plate 70 is provided with 6 flow holes 701, and each flow hole 701 has a diameter of 2.4 mm.

It is known in the art that the adjustment of the energy efficiency (amount of damping generated) of the first piston portion can be adjusted by means of a valve train assembly, a through-flow valve plate and a backup plate assembly. However, in the damper 100 according to the embodiment of the present invention, since the filter screen 40 is additionally provided, the adjustment of the energy efficiency of the first piston portion 20 can be adjusted by the valve train assembly 10, the vent plate 70, the support plate assembly 90, and the filter screen 40. Namely, the adjustment of three structures in the prior art can be changed into the adjustment of four structures, so that the adjustment range is increased, and the use of the shock absorber 100 is more flexible.

The principle of the generation of the damping magnitude in shock absorber 100 is:

during low frequency, the shock absorber 100 mainly generates damping through the second piston part 50, the first piston part 20 works in an auxiliary manner, most of oil generates damping through the second piston part 50, a small part of oil enters the first piston part 20 through the oil passage 301 on the connecting rod 30, the oil enters the valve cavity 7 after flowing through the filter screen 40, then flows through the oil through hole 11 on the mounting piece 1 and the through hole 701 on the through valve plate 70, and finally flows out through the oil through hole 53 on the first valve seat 5. At low frequency, the first piston part 20 generates damping by throttling through the filter screen 40 and the oil through holes 11 on the mounting part 1, the damping size depends on the mesh number of the filter screen 40 and the cross-sectional area of the oil through holes 11, the mesh number of the filter screen 40 is adjustable, and the throttling effect of the oil through holes 11 can be adjusted by setting the mounting parts 1 with different specifications and selecting the oil through holes 11 with different cross-sectional areas. It will of course be appreciated that the amount of damping provided will need to be set according to the requirements of the environment in which shock absorber 100 is used.

At medium and high frequencies, the second piston part 50 and the first piston part 20 participate in the work together, the energy efficiency of the second piston part 50 is taken as the main part, the first piston part 20 is taken as the auxiliary part, most of the oil generates damping through the second piston part 50, part of the oil enters the first piston part 20 through the oil passage 301 on the connecting rod 30, the oil enters the valve cavity 7 after flowing through the filter screen 40, and the valve train assembly 10 can be opened due to relatively high oil pressure (in the specific embodiment of the invention, the opening means that the valve train assembly 10 deforms under certain oil pressure and is no longer sealed with the first valve seat 5, the oil can flow through a gap between the valve train assembly 10 and the first valve seat 5), and then a part of the oil in the valve cavity 7 can flow to the oil flow hole 53 of the first valve seat 5 through a gap between the valve train assembly 10 and the first valve seat 5, and finally flows out of the first piston part 20, another part of the oil can flow through the oil through hole 11 in the mounting element 1 and the through hole 701 in the through-flow valve plate 70, and finally out through the oil through hole 53 in the first valve seat 5. In the middle-high frequency, the first piston part 20 mainly generates damping through the filter screen 40 and the valve system assembly 10, the damping depends on the mesh number of the filter screen 40 and the rigidity of the valve system assembly 10, the mesh number of the filter screen 40 is adjustable, and the rigidity of the valve system assembly 10 can be adjusted by increasing or decreasing the number of valve plates in the valve plate group 2. It will of course be appreciated that the amount of damping provided will need to be set according to the requirements of the environment in which shock absorber 100 is used. It will also be appreciated that the more rigid the valve train assembly 10, the greater the ability of the valve train assembly 10 to resist deformation, indicating the greater the damping that can be generated by the first piston portion 20. In the same usage environment, the opening effect of the valve train assembly 10 at high frequency is certainly greater than the opening effect of the valve train assembly 10 at intermediate frequency, and the damping generated at high frequency is smaller than that generated at intermediate frequency.

Other constructions and operations of shock absorber 100 in accordance with embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A valving assembly (10) for a shock absorber (100), comprising:

the mounting piece (1) is provided with an oil through hole (11), the mounting piece (1) comprises a shaft part (12) and a head part (13), the head part (13) is positioned at one axial end of the shaft part (12), and the shaft part (12) comprises a threaded rod section (121);

the valve plate group (2) comprises a plurality of valve plates, and the valve plates are sequentially sleeved on the shaft part (12);

the stress supporting sheet (3) is sleeved on the shaft part (12) and is positioned on one side, far away from the head part (13), of the valve plate group (2);

the nut (4) is sleeved on the shaft part (12) and located on one side, far away from the valve plate group (2), of the stress supporting sheet (3), and the nut (4) is in threaded fit with the threaded rod section (121) so that the stress supporting sheet (3) compresses the valve plate group (2).

2. The valving assembly (10) for a shock absorber (100) of claim 1 wherein the shaft portion (12) further comprises: the polished rod section (122), the polished rod section (122) is located on one side of the threaded rod section (121) close to the head (13), and the valve plate group (2) is matched with the polished rod section (122).

3. The valving assembly (10) for a shock absorber (100) of claim 2 wherein the polished rod segment (122) extends at both ends to the head (13) and the threaded rod segment (121), respectively, the polished rod segment (122) having an axial length of 3.5mm to 4 mm.

4. The valve train assembly (10) for a shock absorber (100) as set forth in claim 1 wherein said stress strut (3) has an orthographic area equal to or greater than that of said nut (4) and said stress strut (3) has an orthographic area less than that of said valve disc stack (2) as projected onto a plane perpendicular to the axial direction of said shaft portion (12).

5. The valving assembly (10) for a shock absorber (100) as set forth in claim 1 wherein said stress support plate (3) is one or a plurality of stacked and the sum of the thicknesses of all of said stress support plates (3) is 0.4mm-0.8 mm.

6. The valving assembly (10) for a shock absorber (100) of claim 1 wherein the head (13) has a limit stop (131) thereon, the limit stop (131) being adapted to engage a tool to prevent rotation of the mounting member (1) when the threaded rod segment (121) engages the nut (4).

7. The valving assembly (10) for a shock absorber (100) of claim 6 wherein the limit stop (131) is configured as a groove formed on the head portion (13), the groove opening away from the shaft portion (12), the groove being non-circular in cross-section.

8. Valve train assembly (10) for a shock absorber (100) according to any of claims 1 to 7, characterized in that the loosening torque of the valve train assembly (10) is equal to or less than 1.5N-m, the tightening torque of the nut (4) is 2N-m-3N-m, the nominal diameter of the nut (4) is 3mm, the pitch is 0.5 mm.

9. A shock absorber (100) comprising:

a first piston part (20), the first piston part (20) comprising a first valve seat (5) and a second valve seat (6), the second valve seat (6) cooperating with the first valve seat (5) to define a valve cavity (7), the first valve seat (5) having a cooperating shaft hole (51) formed thereon which communicates with the valve cavity (7);

one end of the connecting rod (30) is inserted into the matching shaft hole (51), and an oil liquid passage (301) communicated with the valve cavity (7) is formed in the connecting rod (30);

the valve system component (10), the valve system component (10) is arranged in the valve cavity (7), the valve system component (10) is the valve system component (10) according to any one of claims 1-8, and the oil through hole (11) is communicated with the valve cavity (7).

10. The shock absorber (100) of claim 9, further comprising:

filter screen (40), filter screen (40) are located cooperation shaft hole (51) and/or valve pocket (7), and on the flow direction of fluid, filter screen (40) are located the low reaches of fluid passageway (301) and are located the upper reaches of oil through-hole (11).