Damper core assembly

Abstract

The utility model relates to a shock absorber core assembly which comprises a shell and a rotating shaft, and a plurality of first protruding blocks are arranged on the inner wall of the shell. The rotating shaft is rotatably arranged in the shell, a plurality of second convex blocks are arranged on the rotating shaft, the plurality of second convex blocks and the plurality of first convex blocks are alternately distributed so as to form accommodating cavities between the adjacent second convex blocks and first convex blocks, and the accommodating cavities are used for accommodating damping media; a fixed partition plate and a slidable isolation plug are arranged in the inner space of the rotating shaft, the partition plate and the isolation plug divide the inner space into a closed cavity, an air chamber and an isolation chamber, damping media are arranged in the closed cavity, a piston rod is arranged in the inner space, and one end of the piston rod is located in the closed cavity. The other end of the piston rod slidably penetrates through the partition plate and abuts against the isolation plug. The rotating shaft is provided with flow guide channels, and the multiple flow guide channels are communicated with the isolation chamber and the containing cavity. According to the utility model, the long-term stable working state can be ensured, and the requirement of a vehicle on vibration reduction is met.

Description

Technical Field

[0001] The utility model relates to the field of vibration reduction equipment, and further relates to a vibration reducer core assembly, and in particular to a vibration reducer core assembly which provides impedance in a rotational direction to suppress reciprocating vibration. Background Art

[0002] Shock absorbers are a crucial component of vehicle suspension systems, their primary function being to dampen the reciprocating vibrations of the suspension springs. Driving over uneven roads creates bumps and vibrations, which are transmitted directly through the wheels to the vehicle's suspension springs, causing them to repeatedly deform, store energy, and reset. Shock absorbers absorb the impact energy and released elastic potential energy during this process, converting it into heat and dissipating it. This attenuates vibrations between the vehicle frame and body, improving ride comfort and smoothness.

[0003] At present, the friction shock absorber of the vehicle adopts the friction plate as the vibration reduction element. However, due to the wear of the friction plate during operation, the friction force of the friction plate cannot continuously maintain the designed force value during long-term operation, resulting in a deterioration of the vibration reduction effect of the shock absorber. Moreover, as the friction plate wears, its durability cannot be maintained for a long time. Therefore, the friction plate needs to be regularly inspected and replaced, which not only increases the maintenance cost, but also brings heavy replacement and maintenance work to the staff. Therefore, the existing shock absorber is difficult to meet the long-term and stable operation requirements of the vehicle for vibration reduction.

[0004] Therefore, the utility model proposes a shock absorber core assembly to overcome the defects of the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a shock absorber core assembly that can ensure long-term stable working conditions, meet the vehicle's requirements for vibration reduction, and does not require frequent replacement and maintenance, which helps to reduce the workload of staff and reduce maintenance costs.

[0006] The purpose of this utility model can be achieved by adopting the following scheme:

[0007] The utility model provides a shock absorber core assembly, which includes:

[0008] a hollow shell having an opening communicating with the interior thereof, and a plurality of first protrusions spaced apart on an inner wall of the shell;

[0009] a rotary shaft having an internal space, the rotary shaft being rotatably disposed within the housing, one end of the rotary shaft being rotatably connected to the inner wall of the housing, a portion of the rotary shaft proximate to the other end being rotatably sealedly connected to an opening of the housing, the other end of the rotary shaft extending outside the housing and connected to a rocker that transmits vibration, and a plurality of second protrusions being spaced apart on the outer wall of the rotary shaft;

[0010] Along the circumference of the rotary shaft, a plurality of the second protrusions and a plurality of the first protrusions are alternately distributed to form an accommodating cavity within the housing and between adjacent second protrusions and first protrusions, wherein the accommodating cavity is used to accommodate a damping medium;

[0011] The internal space of the rotary shaft is provided with a fixed partition and a slidable isolation plug, the partition and the isolation plug dividing the internal space into a sealed chamber, an air chamber, and an isolation chamber, the sealed chamber containing a damping medium, and a piston rod disposed in the internal space, one end of the piston rod being located in the sealed chamber, the other end of the piston rod being slidable through the partition and abutting against the isolation plug;

[0012] The rotary shaft is provided with a plurality of guide channels, and the plurality of guide channels are connected with the isolation chamber and the corresponding accommodating cavity.

[0013] In a preferred embodiment of the present invention, the plurality of guide channels are distributed at intervals along the circumference of the rotating shaft, one end of the plurality of guide channels are connected to the isolation chamber, and the other ends of the plurality of guide channels are respectively connected to the accommodating cavities at opposite circumferential positions.

[0014] In a preferred embodiment of the present invention, the piston rod can slide between the closed chamber and the air chamber, and the piston rod has a limit head at one end located in the closed chamber. When the piston rod slides toward the air chamber, the limit head can slide with the piston rod to a position against the partition.

[0015] In a preferred embodiment of the present invention, a blind hole is provided on the inner wall of the housing opposite to the opening, one end of the rotary shaft is rotatably disposed in the blind hole, and the rotary shaft is rotatably sealed to the inner wall of the blind hole;

[0016] An annular rolling element is provided along the circumference of the rotating shaft at a position where the rotating shaft is rotatably connected to the inner wall of the housing. The rolling element is used to rotatably support the rotating shaft.

[0017] In a preferred embodiment of the present invention, at least one end contact surface and at least one circumferential contact surface are provided between the rotary shaft and the inner wall of the housing, and the rolling element includes an annular axial rolling element and an annular circumferential rolling element, wherein the axial rolling element is provided on the end contact surface, and the circumferential rolling element is provided on the circumferential contact surface;

[0018] Alternatively, there is at least one inclined contact surface between the rotary shaft and the inner wall of the housing, and the rolling element is a ring-shaped conical rolling element, and the conical rolling element is arranged on the inclined contact surface.

[0019] In a preferred embodiment of the present invention, the cross section of the first protrusion and / or the cross section of the second protrusion is fan-shaped.

[0020] In a preferred embodiment of the present invention, a first gap for the damping medium to pass through is left between the second protrusion and the inner wall of the housing;

[0021] And / or, a second gap for the damping medium to pass through is reserved between the first protrusion and the outer wall of the rotary shaft.

[0022] In a preferred embodiment of the present invention, a connecting hole is provided on the first protrusion and / or the second protrusion, and the connecting hole connects the two adjacent accommodating chambers. A pressure balancing component is provided in the connecting hole, and the pressure balancing component is used to conduct when the pressure difference between the two adjacent accommodating chambers exceeds a preset pressure difference, so as to allow the damping medium to flow in the two adjacent accommodating chambers.

[0023] In a preferred embodiment of the present invention, the pressure balancing assembly includes:

[0024] A guide rod, wherein the guide rod is a cylindrical structure with one end sealed and the other end open, the outer wall of the guide rod having a first convex ring, the guide rod having a flow guide cavity in communication with the open end, the guide rod having at least one flow hole in communication with the flow guide cavity on the rod wall near the sealed end, the guide rod being disposed on the first protrusion or the second protrusion, and the open end of the guide rod being in communication with the accommodating cavity on one side, and the flow hole being close to the accommodating cavity on the adjacent other side;

[0025] A sliding sleeve, the sliding sleeve is cylindrical and can be slidably sleeved on the outer side of the guide rod, and a second convex ring is provided on the outer wall of the sliding sleeve;

[0026] a spring, the spring being sleeved on the outside of the guide rod and the sliding sleeve, with two ends of the spring respectively abutting against the first convex ring and the second convex ring;

[0027] The guide rod and the sliding sleeve have a relative first position and a second position. When the guide rod and the sliding sleeve are located at the first position, the sliding sleeve blocks the flow hole; when the guide rod and the sliding sleeve are located at the second position, the guide rod and the sliding sleeve slide relative to each other and compress the spring, the sliding sleeve is staggered with the flow hole, and the two adjacent accommodating chambers are connected through the flow hole, the guide inner cavity and the opening of the guide rod.

[0028] In a preferred embodiment of the present invention, an annular sealing groove is provided on the outer wall of the housing near the opening, and one end of the rocker arm has an annular sealing boss that cooperates with the sealing groove. When the rotary shaft and the rocker arm are connected, the sealing boss is embedded in the sealing groove to form a labyrinth structure for sealing at the connection position between the rotary shaft and the rocker arm.

[0029] And / or, a sealing ring is provided between the sealing boss and the inner wall of the sealing groove.

[0030] From the above, the characteristics and advantages of the shock absorber core assembly of the utility model are:

[0031] When vibration is transmitted from the rocker arm to the rotating shaft, the rotating shaft rotates along its central axis relative to the housing. The change in the relative position of the first and second protrusions causes the volumes of the two adjacent accommodating chambers to change, thereby forming a pressure difference between the two adjacent accommodating chambers (i.e., the two adjacent accommodating chambers are respectively a high-pressure accommodating chamber and a low-pressure accommodating chamber). Since the accommodating chambers contain a damping medium, the damping medium inside will to a certain extent prevent the change from occurring when the volumes of the accommodating chambers change, thereby generating an impedance force between the rotating shaft and the housing to achieve a vibration reduction effect.

[0032] When the volumes of two adjacent accommodating chambers change, part of the damping medium in the high-pressure accommodating chamber will enter the isolation chamber in the rotating shaft through the corresponding guide channel under the action of pressure. In addition, when the temperature of the shock absorber increases due to continuous vibration, the volume of the damping medium will expand, and part of the damping medium in the high-pressure accommodating chamber will enter the isolation chamber in the rotating shaft through the corresponding guide channel, while part of the damping medium in the isolation chamber will enter the low-pressure accommodating chamber through another corresponding guide channel, thereby realizing the flow and replenishment of the damping medium between the two accommodating chambers. In addition, when the shock absorber is under low temperature conditions, the volume of the damping medium will shrink, and the preset pressure of the closed chamber and the air chamber will cause part of the damping medium in the isolation chamber in the rotating shaft to enter. The damping medium enters the accommodating chamber through the corresponding guide channel to supplement the damping medium whose volume has shrunk in the accommodating chamber. In addition, in the process of part of the damping medium in the high-pressure accommodating chamber entering the isolation chamber, the damping medium entering the isolation chamber will also exert pressure on the isolation plug, thereby pushing the isolation plug and the piston rod to move synchronously toward the closed chamber. In this process, the volume of the air chamber is compressed and reduced by the isolation plug, while the pressure in the air chamber increases, the damping medium in the closed chamber is compressed by the piston rod, and the pressure in the closed chamber increases synchronously. When the pressure in the accommodating chamber is less than the sum of the pressures of the air chamber and the closed chamber, the isolation plug is pushed in the opposite direction, prompting the damping medium in the isolation chamber to return to the accommodating chamber, ensuring that the damping medium in the accommodating chamber is filled and the vibration reduction performance is ensured.

[0033] The shock absorber core assembly of the utility model can ensure a long-term stable working state through the above-mentioned structure and working principle, meet the vehicle's requirements for vibration reduction, achieve the purpose of shock reduction, and does not require frequent replacement and maintenance, which helps to reduce the workload of staff and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0035] Figure 1 This is one of the front cross-sectional views of the shock absorber core assembly of the present utility model;

[0036] Figure 2 It is a cross-sectional schematic diagram of the location of the corresponding guide channel in the shock absorber core assembly of the present invention;

[0037] Figure 3 for Figure 2 A partial enlarged view of position B in the middle;

[0038] Figure 4 This is a schematic structural diagram of the guide rod in the shock absorber core assembly of the utility model;

[0039] Figure 5 This is a schematic structural diagram of the sliding sleeve in the shock absorber core assembly of the utility model;

[0040] Figure 6 for Figure 1 A partial enlarged view of position A in the middle;

[0041] Figure 7 This is one of the schematic diagrams of the flow direction of the damping medium in the shock absorber core assembly of the utility model;

[0042] Figure 8 This is the second schematic diagram of the flow direction of the damping medium in the shock absorber core assembly of the utility model;

[0043] Figure 9 This is the third schematic diagram of the flow direction of the damping medium in the shock absorber core assembly of the utility model;

[0044] Figure 10 This is the second front cross-sectional view of the shock absorber core assembly of the present utility model;

[0045] Figure 11 This is the third front cross-sectional view of the shock absorber core assembly of the present invention;

[0046] Figure 12 This is the fourth front cross-sectional view of the shock absorber core assembly of the present utility model.

[0047] The accompanying drawings in this utility model are:

[0048] 1. Housing; 101. First protrusion;

[0049] 102. Sealing groove; 2. Rocker;

[0050] 201, sealing boss; 3, rotary shaft;

[0051] 301, partition; 302, piston rod;

[0052] 3021, limit head; 303, isolation plug;

[0053] 305, sealed chamber; 306, air chamber;

[0054] 307. Isolation room; 308. Diversion channel;

[0055] 309, second protrusion; 4, pressure balance assembly;

[0056] 401, guide rod; 4011, diversion cavity;

[0057] 4012, flow hole; 4013, first convex ring;

[0058] 402, sliding sleeve; 4021, second convex ring;

[0059] 403. Spring; 5. Rolling parts;

[0060] 501, axial rolling element; 502, circumferential rolling element;

[0061] 6. Accommodation cavity; 7. First gap;

[0062] 8. Second gap; 9. Sealing ring. DETAILED DESCRIPTION

[0063] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0064] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementations.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0066] In this utility model, words such as "upper", "lower", "top", "bottom" and so on that indicate direction are all used as the Figure 1 The directions of "up", "down", "top" and "bottom" shown in the figure are for the purpose of more clearly and clearly illustrating the structure of the shock absorber core assembly of the present invention, but are not intended to limit the specific directions, which are explained here together.

[0067] Example 1

[0068] like Figures 1 to 11As shown, the utility model provides a shock absorber core assembly, which includes: a hollow shell 1, the shell 1 is a cylindrical structure with a top seal and a bottom opening, the bottom opening of the shell 1 is connected to the interior of the shell 1, and a plurality of first protrusions 101 are evenly and spaced apart along the circumference of the shell 1 on the inner wall of the shell 1; a rotary shaft 3 with an internal space, the rotary shaft 3 is vertically arranged (that is, the central axis of the rotary shaft 3 extends vertically), and the rotary shaft 3 is rotatably arranged in the shell 1, the top end of the rotary shaft 3 is rotatably connected to the inner wall of the shell 1, and the position on the rotary shaft 3 and near its bottom end is rotatably sealed and connected to the opening of the shell 1, and the bottom end of the rotary shaft 3 extends to the outside of the shell 1 and is connected to the rocker rod 2 for transmitting vibration, and a plurality of second protrusions 309 are evenly and spaced apart along the circumference of the rotary shaft 3; along the circumference of the rotary shaft 3, the plurality of second protrusions 309 are connected to the plurality of first protrusions 309 The protrusions 101 are alternately distributed to form a accommodating chamber 6 in the shell 1 and between the adjacent second protrusion 309 and the first protrusion 101, and the accommodating chamber 6 is used to accommodate the damping medium; the internal space of the rotating shaft 3 is provided with a fixed partition 301 and a slidable isolation plug 303, and the partition 301 and the isolation plug 303 divide the internal space into a closed chamber 305, an air chamber 306 and an isolation chamber 307 from bottom to top, and the air chamber 306 contains gas with a preset pressure N1, and the closed chamber 305 contains damping medium with a preset pressure N2, and a piston rod 302 is provided in the internal space, one end of the piston rod 302 is located in the closed chamber 305, and the other end of the piston rod 302 can slide through the partition 301 and abut against the isolation plug 303; the rotating shaft 3 is provided with multiple guide channels 308, and the multiple guide channels 308 connect the isolation chamber 307 and the corresponding accommodating chamber 6.

[0069] During the operation of the present invention, when vibration is transmitted from the rocker arm 2 to the rotating shaft 3, the rotating shaft 3 will rotate along its own central axis relative to the shell 1. The relative rotation between the rotating shaft 3 and the shell 1 will cause the relative position of the first protrusion 101 and the second protrusion 309 to change, and then the volume of the two adjacent accommodating chambers 6 will change through the change in the relative position of the first protrusion 101 and the second protrusion 309, thereby forming a pressure difference between the two adjacent accommodating chambers 6 (that is, the two adjacent accommodating chambers 6 are respectively a high-pressure accommodating chamber and a low-pressure accommodating chamber). Since there is a damping medium in the accommodating chamber 6, when the volume of the accommodating chamber 6 changes, the internal damping medium will prevent the change from occurring to a certain extent, thereby generating impedance force between the rotating shaft 3 and the shell 1 to achieve the effect of vibration reduction.

[0070] When the shock absorber core assembly of the present invention is applied to a vehicle's vibration damping structure, the rocker arm 2 can be connected to the spring of the vehicle's suspension. This allows the rocker arm 2 to transmit vibrations from the vehicle's suspension when the vehicle vibrates, and the shock absorber core assembly of the present invention to dampen the transmitted vibrations. Of course, the rocker arm 2 can also be connected to a device that converts relative motion between the wheel and the vehicle body into rotational motion, thereby achieving both transmission and damping of vibrations generated by the vehicle.

[0071] When the volume of the two adjacent accommodating chambers 6 changes, part of the damping medium in the high-pressure accommodating chamber will enter the isolation chamber 307 in the rotating shaft 3 through the corresponding guide channel 308 under the action of pressure. In addition, when the temperature of the shock absorber increases due to continuous vibration, the volume of the damping medium will expand, and part of the damping medium in the high-pressure accommodating chamber will enter the isolation chamber 307 in the rotating shaft 3 through the corresponding guide channel 308, while part of the damping medium in the isolation chamber 307 will enter the low-pressure accommodating chamber through another corresponding guide channel 308, thereby realizing the flow and replenishment of the damping medium between the two adjacent accommodating chambers 6; in addition, when the shock absorber is under low temperature conditions, the volume of the damping medium will shrink, and the preset pressure of the closed chamber 305 and the air chamber 306 will cause part of the damping medium in the isolation chamber 307 in the rotating shaft 3 to enter the accommodating chamber 307 through the corresponding guide channel 308. 305 , the damping medium in the accommodating chamber 6 is compressed by the piston rod 302, and the pressure in the accommodating chamber 305 increases synchronously. When the pressure in the accommodating chamber 6 is less than the sum of the pressures in the air chamber 306 and the accommodating chamber 305, the isolation plug 303 is pushed in the reverse direction, prompting the damping medium in the isolation chamber 307 to return to the accommodating chamber 6, thereby ensuring that the damping medium in the accommodating chamber 6 is full and the vibration reduction performance is ensured.

[0072] In this utility model, the three-chamber structure within the rotating shaft 3 comprises an isolation chamber 307, an air chamber 306, and a sealed chamber 305. This structure is suitable for operating conditions with high impedance, which require a strong thrust to force the damping medium in the isolation chamber 307 back into the accommodating chamber 6, ensuring that the accommodating chamber 6 is filled with the damping medium and maintaining vibration damping performance. This structure provides a strong elastic force, typically dozens of times that of a spring of equal volume. This elastic force is supplemented by the pressure of the compressed gas in the air chamber 306, thus providing even greater elastic force.

[0073] In the present invention, the gas chamber 306 may be pre-filled with gas to form a preset pressure, and the magnitude of the preset pressure may be adjusted according to actual conditions and is not limited herein. The gas filled into the gas chamber 306 is preferably an inert gas to ensure stable working properties.

[0074] The shock absorber core assembly of the utility model can ensure a long-term stable working state through the above-mentioned structure and working principle, meet the vehicle's requirements for vibration reduction, achieve the purpose of shock reduction, and does not require frequent replacement and maintenance, which helps to reduce the workload of staff and reduce maintenance costs.

[0075] In the present invention, the damping medium may be, but is not limited to, elastic colloid.

[0076] In an optional embodiment of the present invention, when the assembly is completed, the closed chamber 305 is in a closed state. In addition to the pre-filled damping medium in the closed chamber 305, a certain pressure can be preset in the closed chamber 305, thereby improving the pressure-bearing capacity of the closed chamber 305. The damping medium in the closed chamber 305 and the preset pressure, in combination with the pressure in the air chamber 306, can push the isolation plug 303 toward the isolation chamber 307, thereby realizing the backflow of the damping medium. Regardless of high or low temperature conditions, or high or low pressure conditions, the isolation chamber can complement the accommodating chamber.

[0077] In an optional embodiment of the present invention, Figure 2 、 Figures 7 to 9 As shown, multiple guide channels 308 are spaced and evenly distributed along the circumference of the rotating shaft 3, that is, the multiple guide channels 308 are divergently distributed relative to the central axis of the rotating shaft 3, one end of the multiple guide channels 308 are connected to the isolation chamber 307, and the other ends of the multiple guide channels 308 are respectively connected to the accommodating chambers 6 at opposite circumferential positions, thereby improving the flow conduction capacity between the isolation chamber 307 and the accommodating chamber 6, and ensuring that the damping medium can flow smoothly between the isolation chamber 307 and the accommodating chamber 6.

[0078] In an optional embodiment of the present invention, Figure 1 、 Figure 10 、 Figure 11As shown, the piston rod 302 is arranged vertically and can slide up and down between the sealed chamber 305 and the air chamber 306. The end of the piston rod 302 located in the sealed chamber 305 (i.e., the bottom end of the piston rod 302) has a stopper 3021. The cross-sectional area of ​​the stopper 3021 is larger than the cross-sectional area of ​​the piston rod 302 body. When the piston rod 302 slides toward the air chamber 306, the stopper 3021 can slide with the piston rod 302 to a position where it abuts against the partition 301. The provision of the stopper 3021 can play a role in limiting the upward movement of the piston rod 302.

[0079] Further, such as Figure 1 、 Figure 10 、 Figure 11 As shown, at least one sealing ring 9 is provided between the piston rod 302 and the partition plate 301 . The sealing ring 9 is clamped between the piston rod 302 and the partition plate 301 to ensure a sealing effect between the piston rod 302 and the partition plate 301 .

[0080] Further, such as Figure 1 、 Figure 10 、 Figure 11 As shown, a sealing ring 9 is provided between the isolation plug 303 and the inner wall of the internal space of the rotating shaft 3. The sealing ring 9 is clamped between the isolation plug 303 and the inner wall of the internal space of the rotating shaft 3 to ensure the sealing effect between the isolation plug 303 and the inner wall of the internal space of the rotating shaft 3, thereby ensuring that the air chamber 306 and the isolation chamber 307 are two independent chambers.

[0081] In an optional embodiment of the present invention, Figure 1 、 Figure 10 、 Figure 11 As shown, a blind hole is provided on the inner wall of the shell 1 opposite to the opening (i.e., the top inner wall of the shell 1), and the top of the rotary shaft 3 is rotatably arranged in the blind hole, and the top of the rotary shaft 3 is rotatably sealed and connected to the inner wall of the blind hole. The structure in which the top of the shell 1 is closed and provided with a blind hole can reduce the risk of leakage of the damping medium in the accommodating chamber 6 compared to the structure in which through holes are provided at the top and bottom of the shell 1. A sealing structure such as a sealing ring 9 can be provided at this position, or other sealing structures can be omitted, and both can ensure a good sealing effect. In the present utility model, the shell 1 has only one opening, which reduces the risk of leakage by half compared to the structure with openings at both ends. Even if the blind hole end is not open, the rotary shaft 3 and the inner wall of the blind hole are still rotatably sealed, and the sealing effect is better.

[0082] In an optional embodiment of the present invention, Figure 1 、 Figure 10 、 Figure 11As shown, an annular rolling element 5 is provided along the circumference of the rotating shaft 3 at the location where the rotating shaft 3 is rotatably connected to the inner wall of the housing 1. The rolling element 5 is used to provide rotational support for the rotating shaft 3. When the rotating shaft 3 rotates along its own central axis relative to the housing 1, the rolling element 5 supports and guides the rotating shaft 3, thereby forming a rolling friction fit between the rotating shaft 3 and the inner wall of the housing 1 to maintain stable and long-lasting rotational motion. By replacing the original sliding motion mode with the rolling element 5, the utility model can reduce the sliding friction between the friction rotating shaft 3 and the housing 1, ensure the stability of the rotation of the rotating shaft 3, and extend the service life.

[0083] In the present invention, compared with the structure of the traditional bearing having an inner ring and an outer ring, the present application actually utilizes the outer wall of the rotating shaft 3 and the inner wall of the housing 1 as the inner ring and outer ring of the bearing, which has the advantage of a compact structure.

[0084] Further, such as Figure 1 、 Figure 10 As shown, the end of the rotating shaft 3 or the position near the end is stepped, and the inner wall of the housing 1 also has a matching stepped structure, so that at least one end contact surface and at least one circumferential contact surface can be formed between the rotating shaft 3 and the inner wall of the housing 1; the rolling element 5 includes an annular axial rolling element 501 and an annular circumferential rolling element 502, the axial rolling element 501 is arranged on the end contact surface, and the circumferential rolling element 502 is arranged on the circumferential contact surface. Among them, the end contact surface is formed by the top end surface of the step position on the rotating shaft 3 and the bottom surface of the stepped structure on the inner wall of the housing 1, and the axial rolling element 501 is arranged between the top end surface of the step position on the rotating shaft 3 and the bottom surface of the stepped structure on the inner wall of the housing 1; the circumferential contact surface is formed by the side surface of the step position on the rotating shaft 3 and the side surface of the stepped structure on the inner wall of the housing 1, and the circumferential rolling element 502 is arranged between the side surface of the step position on the rotating shaft 3 and the side surface of the stepped structure on the inner wall of the housing 1. In this embodiment, the axial force and the radial force can be borne respectively by the axial rolling element 501 and the circumferential rolling element 502, thereby ensuring the supporting effect for the rotary shaft 3 in the axial and radial directions at the same time.

[0085] Furthermore, in another optional embodiment, as Figure 11 As shown, there is at least one inclined contact surface between the rotating shaft 3 and the inner wall of the housing 1. The rolling element 5 is a ring-shaped conical rolling element, which is arranged on the inclined contact surface. The provision of the conical rolling element can simultaneously ensure axial and radial support for the rotating shaft 3, and the structure is more compact.

[0086] Among them, the above-mentioned axial rolling element 501, circumferential rolling element 502 and tapered rolling element can all adopt ball or roller bearing structures, and the inner and outer rings of the bearings are arranged in different directions to form rolling elements 5 adapted to different contact surfaces.

[0087] Further, such as Figure 1 、 Figure 10 、 Figure 11 As shown, a sealing ring 9 is provided at the position where the rotating shaft 3 is rotatably connected to the inner wall of the housing 1. The sealing ring 9 is clamped between the outer wall of the rotating shaft 3 and the inner wall of the housing 1 to ensure a rotating sealed connection between the rotating shaft 3 and the inner wall of the housing 1.

[0088] In an optional embodiment of the present invention, Figure 2 、 Figures 7 to 9 As shown, the number of the first protrusions 101 and the number of the second protrusions 309 are two respectively; the two first protrusions 101 are axially symmetrically arranged, and / or the two second protrusions 309 are axially symmetrically arranged, so that the two first protrusions 101 and the two second protrusions 309 cooperate with each other to separate the shell 1 into four accommodating chambers 6 that are adjacent to each other in the circumferential direction, that is, when relative rotation occurs between the rotating shaft 3 and the shell 1, any two adjacent accommodating chambers 6 in the four accommodating chambers 6 are respectively a high-pressure accommodating chamber and a low-pressure accommodating chamber.

[0089] In an optional embodiment of the present invention, Figure 2 、 Figures 7 to 9 As shown, a first gap 7 for the damping medium to pass through is provided between the second protrusion 309 and the inner wall of the housing 1; and / or a second gap 8 for the damping medium to pass through is provided between the first protrusion 101 and the outer wall of the rotating shaft 3. When the rotating shaft 3 and the housing 1 rotate relative to each other, and the volumes of the two adjacent accommodating chambers 6 change, some of the damping medium in the high-pressure accommodating chamber of the two adjacent accommodating chambers 6 can enter the low-pressure accommodating chamber through the first gap 7 and / or the second gap 8, thereby providing more paths for the damping medium to flow between the two adjacent accommodating chambers 6 and improving the vibration reduction effect.

[0090] In an optional embodiment of the present invention, Figure 2 、 Figures 7 to 9 As shown, the cross-section of the first bump 101 and / or the cross-section of the second bump 309 is fan-shaped, thereby increasing the length of the first gap 7. The longer the channel through which the damping medium flows, the higher the pressure differential across the channel and the greater the impedance, thereby improving the vibration damping capability of the shock absorber. Furthermore, the fan-shaped cross-section of the first bump 101, i.e., the overall trapezoidal structure of the first bump 101, enhances the structural strength of the housing 1 and provides greater stability.

[0091] In an optional embodiment of the present invention, Figures 2 to 5As shown, a communicating hole is provided on the first protrusion 101, which connects two adjacent accommodating chambers 6. A pressure balancing assembly 4 is provided in the communicating hole. The pressure balancing assembly 4 is used to conduct when a preset pressure difference between the two adjacent accommodating chambers 6 exceeds the pressure difference, so as to allow the damping medium to flow between the two adjacent accommodating chambers 6. Of course, the pressure balancing assembly 4 can also be provided on the second protrusion 309, or the pressure balancing assembly 4 can be provided on both the first protrusion 101 and the second protrusion 309.

[0092] Specifically, such as Figures 3 to 5 As shown, the pressure balancing assembly 4 includes a guide rod 401, a sleeve 402 and a spring 403. The guide rod 401 is a cylindrical structure with one end sealed and the other end open. The outer wall of the guide rod 401 has a first convex ring 4013. The guide rod 401 has a guide cavity 4011 connected to the open end. The guide rod 401 has at least one flow hole 4012 connected to the guide cavity 4011 on the rod wall near its sealed end. The guide rod 401 is arranged on the first protrusion 101, and the open end of the guide rod 401 is connected to the accommodating cavity 6 on one side. The flow hole 4012 is close to the accommodating cavity 6 on the other side. The sleeve 402 is cylindrical and can be slidably mounted on the outside of the guide rod 401. The outer wall of the sleeve 402 has a second convex ring 4021. The spring 403 Sleeved around the outside of the guide rod 401 and the sleeve 402, one end of the spring 403 abuts against the first protruding ring 4013, while the other end of the spring 403 abuts against the second protruding ring 4021. The guide rod 401 and the sleeve 402 have a first position and a second position relative to each other. When the guide rod 401 and the sleeve 402 are in the first position, the sleeve 402 blocks the flow hole 4012. When the guide rod 401 and the sleeve 402 are in the second position, the guide rod 401 and the sleeve 402 slide relative to each other, compressing the spring 403. The sleeve 402 is offset from the flow hole 4012, and the adjacent accommodating chambers 6 are connected through the flow hole 4012, the guide cavity 4011, and the opening of the guide rod 401, thereby enabling the damping medium to flow through the adjacent accommodating chambers 6. When the pressure difference between the adjacent accommodating chambers 6 is greater than the elastic force of the spring 403, the pressure balancing assembly 4 is turned on.

[0093] In an optional embodiment of the present invention, Figure 1 、 Figure 5 As shown, an annular sealing groove 102 is provided on the outer wall of the shell 1 near the opening, and an annular sealing boss 201 is provided at one end of the rocker arm 2 to cooperate with the sealing groove 102. When the rotating shaft 3 is connected to the rocker arm 2, the sealing boss 201 is embedded in the sealing groove 102 to form a labyrinth structure for sealing at the connection position of the rotating shaft 3 and the rocker arm 2, thereby improving the sealing effect of the connection position of the rotating shaft 3 and the rocker arm 2 and preventing external foreign matter from entering the shock absorber.

[0094] Further, such as Figure 1 、 Figure 6 As shown, a sealing ring 9 may be provided between the sealing boss 201 and the inner wall of the sealing groove 102 to further improve the sealing effect and ensure the sealing effect.

[0095] The working principle of the shock absorber core assembly of the utility model is:

[0096] When the vibration is transmitted to the rocker 2, the rocker 2 drives the rotary shaft 3 to rotate along its central axis relative to the housing 1. Since the relative position between the first protrusion 101 and the second protrusion 309 changes, the volume of the two adjacent accommodating chambers 6 changes due to the change in the relative position of the first protrusion 101 and the second protrusion 309, so that the two adjacent accommodating chambers 6 become a high-pressure accommodating chamber and a low-pressure accommodating chamber with a pressure difference, respectively. At this time, Figure 7 、 Figure 10 As shown, part of the damping medium in the high-pressure accommodating chamber flows from the high-pressure accommodating chamber through part of the guide channel 308 to the isolation chamber 307, and at the same time, part of the damping medium flows from the isolation chamber 307 through another part of the guide channel 308 to the low-pressure accommodating chamber. Since the pressure difference between the two adjacent accommodating chambers 6 will push the sliding sleeve 402 in the pressure balancing component 4 to slide relative to the guide rod 401, the pressure balancing component 4 is turned on, and then part of the damping medium will flow directly from the high-pressure accommodating chamber to the low-pressure accommodating chamber through the pressure balancing component 4. In the above process, since the setting of the damping medium will prevent the occurrence of changes to a certain extent, a certain impedance force will be generated between the rotating shaft 3 and the shell 1 to achieve the effect of vibration reduction.

[0097] The operating principle of the pressure balance component 4 is as follows: Figure 8 As shown, when the rotary shaft 3 rotates clockwise, the pressure in the high-pressure chamber exceeds the elastic force of the spring 403 in the pressure balance component 4, and the sleeve 402 will move toward the high-pressure chamber (i.e. Figure 8 The right side of the guide rod 401 slides, the spring 403 is compressed, the sleeve 402 is staggered with the flow hole 4012 on the guide rod 401 (i.e. the sleeve 402 and the guide rod 401 are in the second position), and the damping medium in the high-pressure chamber can flow into the low-pressure chamber through the flow hole 4012, the guide cavity 4011 and the opening of the guide rod 401 in sequence, thereby reducing the pressure in the high-pressure chamber and playing a role in balancing and stabilizing the pressure. Figure 9As shown, when the rotating shaft 3 rotates counterclockwise, the positions of the high-pressure accommodating chamber and the low-pressure accommodating chamber are opposite to those when the rotating shaft 3 rotates counterclockwise, and the damping medium in the high-pressure accommodating chamber can flow into the low-pressure accommodating chamber through the opening of the guide rod 401, the guide cavity 4011, and the flow hole 4012 in sequence, thereby reducing the pressure in the high-pressure accommodating chamber and playing a role in balancing and stabilizing the pressure. When the pressure in the high-pressure accommodating chamber is insufficient (i.e., the pressure in the high-pressure accommodating chamber is less than the elastic force of the spring 403), the elastic force of the spring 403 causes the sliding sleeve 402 to return to the position blocking the flow hole 4012 (i.e., the sliding sleeve 402 and the guide rod 401 are in the first position), further increasing the pressure. When the pressure in the high-pressure accommodating chamber again exceeds the elastic force of the spring 403 in the pressure balancing assembly 4, the pressure balancing assembly 4 is turned on again, further reducing the pressure. By setting the pressure balancing component 4, the impedance force generated by the shock absorber will not increase too much or decrease too much instantly, thereby ensuring the stability of the shock absorber operation and achieving the purpose of stable vibration reduction.

[0098] The shock absorber core assembly of the utility model can ensure a long-term stable working state, meet the vehicle's requirements for vibration reduction, achieve the purpose of shock reduction, and does not require frequent replacement and maintenance, which helps to reduce the workload of staff and reduce maintenance costs.

[0099] Example 2

[0100] like Figures 2 to 5 、 Figures 7 to 9 、 Figure 12As shown, the utility model provides a shock absorber core assembly, which includes: a hollow shell 1, which is a cylindrical structure with a top seal and a bottom opening, the bottom opening of the shell 1 is connected to the interior of the shell 1, and a plurality of first protrusions 101 are evenly and spaced along the circumference of the inner wall of the shell 1; a rotary shaft 3 with an internal space, the rotary shaft 3 is vertically arranged (that is, the central axis of the rotary shaft 3 extends vertically), and the rotary shaft 3 is rotatably arranged in the shell 1, the top end of the rotary shaft 3 is rotatably connected to the inner wall of the shell 1, and the position on the rotary shaft 3 and near its bottom end is rotatably sealed with the opening of the shell 1, and the bottom end of the rotary shaft 3 extends to the outside of the shell 1 and is connected to the vibration transmitting The rocker arm 2 is connected, and a plurality of second protrusions 309 are evenly spaced along the circumference of the rotating shaft 3 on the outer wall; along the circumference of the rotating shaft 3, the plurality of second protrusions 309 and the plurality of first protrusions 101 are alternately distributed to form a accommodating cavity 6 in the shell 1 and between the adjacent second protrusions 309 and the first protrusions 101, and the accommodating cavity 6 is used to accommodate the damping medium; the internal space of the rotating shaft 3 is provided with an isolation plug 303 that can slide up and down, and the isolation plug 303 divides the internal space into an air chamber 306 and an isolation chamber 307, and the air chamber 306 contains gas with a preset pressure N1; the rotating shaft 3 is provided with a plurality of guide channels 308, and the plurality of guide channels 308 connect the isolation chamber 307 with the corresponding accommodating cavity 6.

[0101] During the operation of the present invention, when vibration is transmitted from the rocker arm 2 to the rotating shaft 3, the rotating shaft 3 will rotate along its own central axis relative to the shell 1. The relative rotation between the rotating shaft 3 and the shell 1 will cause the relative position of the first protrusion 101 and the second protrusion 309 to change, and then the volume of the two adjacent accommodating chambers 6 will change through the change in the relative position of the first protrusion 101 and the second protrusion 309, thereby forming a pressure difference between the two adjacent accommodating chambers 6 (that is, the two adjacent accommodating chambers 6 are respectively a high-pressure accommodating chamber and a low-pressure accommodating chamber). Since there is a damping medium in the accommodating chamber 6, when the volume of the accommodating chamber 6 changes, the internal damping medium will prevent the change from occurring to a certain extent, thereby generating impedance force between the rotating shaft 3 and the shell 1 to achieve the effect of vibration reduction.

[0102] When the volume of the two adjacent accommodating chambers 6 changes, part of the damping medium in the high-pressure accommodating chamber 6 will enter the isolation chamber 307 in the rotating shaft 3 through the corresponding guide channel 308 under the action of pressure. In addition, when the temperature of the shock absorber increases due to continuous vibration, the volume of the damping medium will expand, and part of the damping medium in the high-pressure accommodating chamber 6 will enter the isolation chamber 307 in the rotating shaft 3 through the corresponding guide channel 308, while part of the damping medium in the isolation chamber 307 will enter the low-pressure accommodating chamber through another corresponding guide channel 308, thereby realizing the flow and replenishment of the damping medium between the two accommodating chambers 6; in addition, when the shock absorber is under low temperature conditions, the volume of the damping medium will shrink, and the preset pressure in the air chamber 306 will make Part of the damping medium in the isolation chamber 307 in the rotating shaft 3 enters the accommodating chamber 6 through the corresponding guide channel 308, and replenishes the damping medium whose volume has shrunk in the accommodating chamber 6; in the process of part of the damping medium in the high-pressure accommodating chamber entering the isolation chamber 307, the damping medium entering the isolation chamber 307 will also exert pressure on the isolation plug 303, thereby pushing the isolation plug 303 to move toward the air chamber 306. During this process, the volume of the air chamber 306 is compressed and reduced by the isolation plug 303, and the pressure in the air chamber 306 increases. When the pressure in the accommodating chamber 6 is lower than the pressure in the air chamber 306, the isolation plug 303 is pushed in the opposite direction, prompting the damping medium in the isolation chamber 307 to return to the accommodating chamber 6, ensuring that the damping medium in the accommodating chamber 6 is full, thereby ensuring the vibration reduction performance.

[0103] It should be noted that, in the description of this application, the terms "first," "second," etc., are used solely for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, nor should they be understood to indicate or imply relative importance. Furthermore, in the description of this application, unless otherwise specified, "plurality" means two or more.

[0104] The above-mentioned various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0105] The above are only a few embodiments of the present invention. Although the embodiments disclosed in the present invention are as above, the contents are only for the purpose of facilitating the understanding of the present invention and are not intended to limit the present invention. Any person skilled in the art of the present invention may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in the present invention. However, the scope of patent protection of the present invention shall still be based on the scope defined by the appended claims.

Claims

1. A shock absorber core assembly, characterized in that: The shock absorber core assembly includes: a hollow shell having an opening communicating with the interior thereof, and a plurality of first protrusions spaced apart on an inner wall of the shell; a rotary shaft having an internal space, the rotary shaft being rotatably disposed within the housing, one end of the rotary shaft being rotatably connected to the inner wall of the housing, a portion of the rotary shaft proximate to the other end being rotatably sealedly connected to an opening of the housing, the other end of the rotary shaft extending outside the housing and connected to a rocker that transmits vibration, and a plurality of second protrusions being spaced apart on the outer wall of the rotary shaft; Along the circumference of the rotary shaft, a plurality of the second protrusions and a plurality of the first protrusions are alternately distributed to form an accommodating cavity within the housing and between adjacent second protrusions and first protrusions, wherein the accommodating cavity is used to accommodate a damping medium; The internal space of the rotary shaft is provided with a fixed partition and a slidable isolation plug, the partition and the isolation plug dividing the internal space into a sealed chamber, an air chamber, and an isolation chamber, the sealed chamber containing a damping medium, and a piston rod disposed in the internal space, one end of the piston rod being located in the sealed chamber, the other end of the piston rod being slidable through the partition and abutting against the isolation plug; The rotary shaft is provided with a plurality of guide channels, and the plurality of guide channels are connected with the isolation chamber and the corresponding accommodating cavity.

2. The shock absorber core assembly according to claim 1, characterized in that: The plurality of guide channels are distributed at intervals along the circumference of the rotary shaft, one end of the plurality of guide channels is communicated with the isolation chamber, and the other ends of the plurality of guide channels are respectively communicated with the accommodating cavities at opposite circumferential positions.

3. The shock absorber core assembly according to claim 1, characterized in that: The piston rod can slide between the closed chamber and the air chamber. The end of the piston rod located in the closed chamber has a limit head. When the piston rod slides toward the air chamber, the limit head can slide with the piston rod to a position against the partition.

4. The shock absorber core assembly according to claim 1, wherein: A blind hole is provided on the inner wall of the housing opposite to the opening, one end of the rotary shaft is rotatably disposed in the blind hole, and the rotary shaft is rotatably sealed to the inner wall of the blind hole; An annular rolling element is provided along the circumference of the rotating shaft at a position where the rotating shaft is rotatably connected to the inner wall of the housing. The rolling element is used to rotatably support the rotating shaft.

5. The shock absorber core assembly according to claim 4, characterized in that: At least one end contact surface and at least one circumferential contact surface are formed between the rotary shaft and the inner wall of the housing, and the rolling element includes an annular axial rolling element and an annular circumferential rolling element, the axial rolling element is arranged on the end contact surface, and the circumferential rolling element is arranged on the circumferential contact surface; Alternatively, there is at least one inclined contact surface between the rotary shaft and the inner wall of the housing, and the rolling element is a ring-shaped conical rolling element, and the conical rolling element is arranged on the inclined contact surface.

6. The shock absorber core assembly according to claim 1, wherein: The cross section of the first bump and / or the cross section of the second bump is fan-shaped.

7. The shock absorber core assembly according to claim 1, wherein: A first gap for the damping medium to pass through is left between the second protrusion and the inner wall of the housing; And / or, a second gap for the damping medium to pass through is reserved between the first protrusion and the outer wall of the rotary shaft.

8. The shock absorber core assembly according to claim 1, wherein: A connecting hole is provided on the first protrusion and / or the second protrusion, and the connecting hole connects the two adjacent accommodating chambers. A pressure balancing component is provided in the connecting hole, and the pressure balancing component is used to conduct when the pressure difference between the two adjacent accommodating chambers exceeds a preset pressure difference, so as to allow the damping medium to flow in the two adjacent accommodating chambers.

9. The shock absorber core assembly according to claim 8, wherein: The pressure balancing assembly comprises: A guide rod, wherein the guide rod is a cylindrical structure with one end sealed and the other end open, the outer wall of the guide rod having a first convex ring, the guide rod having a flow guide cavity in communication with the open end, the guide rod having at least one flow hole in communication with the flow guide cavity on the rod wall near the sealed end, the guide rod being disposed on the first protrusion or the second protrusion, and the open end of the guide rod being in communication with the accommodating cavity on one side, and the flow hole being close to the accommodating cavity on the adjacent other side; A sliding sleeve, the sliding sleeve is cylindrical and can be slidably sleeved on the outer side of the guide rod, and a second convex ring is provided on the outer wall of the sliding sleeve; a spring, the spring being sleeved on the outside of the guide rod and the sliding sleeve, with two ends of the spring respectively abutting against the first convex ring and the second convex ring; The guide rod and the sliding sleeve have a relative first position and a second position. When the guide rod and the sliding sleeve are located at the first position, the sliding sleeve blocks the flow hole; when the guide rod and the sliding sleeve are located at the second position, the guide rod and the sliding sleeve slide relative to each other and compress the spring, the sliding sleeve is staggered with the flow hole, and the two adjacent accommodating chambers are connected through the flow hole, the guide inner cavity and the opening of the guide rod.

10. The shock absorber core assembly according to claim 1, wherein: An annular sealing groove is provided on the outer wall of the housing near the opening, and an annular sealing boss is provided at one end of the rocker arm to cooperate with the sealing groove. When the rotary shaft and the rocker arm are connected, the sealing boss is embedded in the sealing groove to form a labyrinth structure for sealing at the connection position between the rotary shaft and the rocker arm. And / or, a sealing ring is provided between the sealing boss and the inner wall of the sealing groove.

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