Hydraulic recovery buffering double-cylinder shock absorber with good shock absorption performance
By improving the structure of the twin-tube shock absorber and adding heat dissipation measures, the problems of insufficient damping oil and poor heat dissipation performance were solved, better vibration reduction effect and stability were achieved, and the performance of the shock absorber was improved.
Patent Information
- Application Number
- CN202510942186.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-09
- Publication Date
- 2025-09-16
AI Technical Summary
Existing double-tube shock absorbers have a small amount of damping oil and poor heat dissipation performance, resulting in poor vibration reduction effect. Some shock absorbers are only equipped with a single set of vibration reduction springs, which further reduces the use effect.
A hydraulic recovery buffer double-tube shock absorber is designed, which adopts an inner and outer tube structure. By setting a working cylinder, an oil storage cylinder, a damping rubber seat, the first and second serpentine oil holes, and the first and second damping springs, dual flow limiting damping and vibration reduction buffering are achieved; and the heat dissipation performance is improved by using heat conductive blocks and heat dissipation fins to absorb and conduct the heat of the hydraulic oil.
It effectively improves the vibration reduction effect of the shock absorber, ensures that the damping oil does not age quickly, provides stable vibration reduction performance, and enhances the safety and service life of the shock absorber.
Smart Images
Figure CN120650376A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of shock absorbers, in particular to a hydraulic restoring buffer double-tube shock absorber with good shock absorption performance. Background Art
[0002] Shock absorbers are used to suppress oscillations caused by rebound after springs absorb vibrations, as well as impacts from the road surface. They are widely used in automobiles to accelerate the attenuation of frame and body vibrations to improve the vehicle's ride smoothness. When driving over uneven roads, although the vibration-absorbing springs can filter out road vibrations, the springs themselves will still experience reciprocating motion, and shock absorbers are used to suppress this spring bouncing. The hydraulic restoring buffer is a hydraulic buffer device placed within the shock absorber's working cylinder to increase the shock absorber's damping characteristics, reduce the spring's rebound speed, and achieve effective vibration reduction. Among them, the double-tube shock absorber uses an inner and outer tube double-tube structure, which can better convert road vibrations into kinetic energy of the oil inside the shock absorber, thereby achieving a better vibration reduction effect. Its stable structure can withstand pulse-type impacts, providing reliable safety performance, and is widely used in automobile suspension systems.
[0003] However, current twin-tube shock absorbers have certain drawbacks. Due to their twin-tube structure, the internal damping oil volume is low, and the damping oil's heat dissipation performance is poor, leading to oil aging and quality degradation. Furthermore, some shock absorbers are equipped with only a single set of damping springs, which reduces their effectiveness. To address these issues, we propose a twin-tube shock absorber with hydraulic restoring buffering and excellent vibration damping performance. Summary of the Invention
[0004] In view of the shortcomings of the existing technology, the present invention provides a hydraulic recovery buffer double-tube shock absorber with good vibration reduction performance, aiming to solve the problems of the existing double-tube shock absorber such as small amount of damping oil, poor heat dissipation performance and single vibration reduction spring resulting in poor vibration reduction effect.
[0005] A hydraulic restoring buffer double-tube shock absorber with good vibration reduction performance, comprising: An oil storage cylinder, wherein the inner wall of the oil storage cylinder is fixedly connected to a working cylinder, the interior of the working cylinder is filled with hydraulic oil, the inner wall of the top end of the working cylinder is fixedly connected to a piston oil seal seat, the inner wall of the bottom end of the oil storage cylinder is fixedly inlaid with a base compression valve seat, and the upper surface of the base compression valve seat is fixedly connected to a damping rubber seat; The piston rod passes through the working cylinder, and the outer surface of the lower portion of the piston rod is fixedly sleeved with a first piston block and a second piston block in sequence from bottom to top. The first piston block and the second piston block both form a sealed piston with the inner wall of the working cylinder, and the first piston block is provided with a plurality of first serpentine oil holes arranged in an annular manner, and the second piston block is provided with a plurality of second serpentine oil holes arranged in an annular manner. The first serpentine oil holes and the second serpentine oil holes are used for hydraulic oil to pass through the piston and generate corresponding damping effects. The top end of the piston rod extends to the outside of the working cylinder and is fixedly connected to a support plate, and the upper surface of the support plate is provided with a first mounting head; a rebound stopper, the rebound stopper being fixedly sleeved on the outer surface of the piston rod and located above the second piston block, the rebound stopper being used to limit the axial displacement of the second piston block along the piston rod; a second mounting head, the second mounting head being fixed to the bottom surface of the oil storage cylinder; A heat dissipation structure comprising a plurality of heat-conducting components fixedly embedded in the outer surface of the oil storage cylinder and arranged in an annular manner, wherein the heat-conducting components comprise heat-conducting blocks and heat-dissipating fins fixedly connected to each other; The vibration damping assembly includes a first vibration damping spring sleeved on the outer surface of the oil storage cylinder and a second vibration damping spring sleeved on the outer surface of the piston rod. The two ends of the first vibration damping spring are respectively connected to the support plate and the support plate, and the two ends of the second vibration damping spring are respectively connected to the top of the oil storage cylinder and the support plate.
[0006] Preferably, the oil storage cylinder is filled with hydraulic oil and nitrogen located above the hydraulic oil, and the nitrogen compensates for the volume change of the hydraulic oil through compressibility.
[0007] Preferably, a group of aluminum heat dissipation fins are fixedly embedded on the outer surface of each heat-conducting block, and each group of heat dissipation fins is distributed in a radial array.
[0008] Preferably, a limiting column is provided on the outer surface of the top end of the piston rod, and a telescopic dust-proof sleeve made of rubber is clamped at the bottom end of the limiting column, and the lower end of the telescopic dust-proof sleeve forms a dynamic seal with the top end of the oil storage cylinder.
[0009] Preferably, a damping protective sleeve is provided on the outer surface of the second mounting head, and the top end of the damping protective sleeve is fixedly connected to the bottom surface of the oil storage cylinder through interference fit.
[0010] Preferably, a ring-shaped array of stabilizing blocks is fixed to the outer surface of the bottom end of the oil storage cylinder, and the stabilizing blocks are in a triangular supporting structure with the top ends fixedly connected to the bottom surface of the support plate.
[0011] Preferably, two metal handles are symmetrically fixed to the upper surface of the support plate, and the outer surface of the handles is covered with a rubber anti-slip cover with convex patterns.
[0012] Preferably, a model mark is provided on the left side of the first mounting head, and the model mark is located in the middle of the first mounting head.
[0013] Preferably, the spiral angles of the first serpentine oil hole and the second serpentine oil hole are 45°±5° and 135°±5° respectively, the rotation directions of the two oil holes are opposite and the cross-sectional area ratio is 1:1.2-1.5.
[0014] Preferably, the damping rubber seat is made of a polyurethane-graphene composite material, and its compressive elastic modulus is 50-80 MPa.
[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a working cylinder, an oil storage cylinder, a base compression valve seat, a first piston block, a first serpentine oil hole, a second piston block and a second serpentine oil hole, and utilizes the first serpentine oil hole and the second serpentine oil hole to perform double flow limiting and blocking on the hydraulic oil, thereby realizing a double-piston damping rebound of the piston rod hydraulic oil; at the same time, through the cooperation of the first damping spring, the second damping spring and the damping rubber seat, the vibration damping and buffering of the double vibration damping springs and the secondary damping effect of the damping rubber seat are utilized to effectively improve the vibration damping and buffering effect of the shock absorber.
[0016] The present invention generates a lot of heat when generating a large damping force. By providing an oil storage cylinder, a heat conducting block and heat dissipating fins, it can absorb and conduct the heat inside the hydraulic oil, help it to be discharged from the oil storage cylinder, realize the heat dissipation and cooling of the hydraulic oil, solve the problem of rapid aging of the oil, and ensure the stable use of the shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a hydraulic restoring buffer double-tube shock absorber with good vibration reduction performance according to the present invention; Figure 2 It is a side view of the oil storage cylinder of the present invention; Figure 3 A bottom view of the oil storage cylinder of the present invention; Figure 4 Schematic diagram of the internal dissected structure of the working cylinder of the present invention; Figure 5 It is a cross-sectional view of the top view of the working cylinder barrel of the present invention.
[0018] Figure markings: 1. Oil storage cylinder; 2. Heat-conducting block; 3. Heat dissipating fins; 4. First shock-absorbing spring; 5. Rubber anti-slip sleeve; 6. Grip; 7. Support plate; 8. Damping protective sleeve; 9. Second mounting head; 10. Piston oil seal seat; 11. Telescopic dust cover; 12. Second shock-absorbing spring; 13. Support plate; 14. First mounting head; 15. Model mark; 16. Limit column; 17. Stabilizing block; 18. Piston rod; 19. Working cylinder; 20. Rebound block; 21. First piston block; 22. First serpentine oil hole; 23. Fastening nut; 24. Base compression valve seat; 25. Damping rubber seat; 26. Second piston block; 27. Second serpentine oil hole. DETAILED DESCRIPTION
[0019] The following is combined with Figure 1-5 The present invention is further illustrated with examples.
[0020] See also Figure 1-5 , In this embodiment: A hydraulic restoring buffer double-tube shock absorber with good vibration damping performance, including an oil storage cylinder 1, the inner wall of the oil storage cylinder 1 is fixedly connected to a working cylinder 19, the top inner wall of the working cylinder 19 is fixedly connected to a piston oil seal seat 10, the inner bottom wall of the working cylinder 19 is fixedly inlaid with a base compression valve seat 24, the upper surface of the base compression valve seat 24 is fixedly connected to a damping rubber seat 25, a piston rod 18 is provided inside the working cylinder 19, the bottom outer surface of the piston rod 18 is fixedly connected to a first piston block 21, the upper surface of the first piston block 21 is provided with a first serpentine oil through hole 22 arranged in an annular manner, the bottom end of the piston rod 18 is threadedly connected to a fastening nut 23, the outer surface of the piston rod 18 is fixedly connected to a second piston block 26, the upper surface of the second piston block 26 is provided with a second serpentine oil through hole 27 arranged in an annular manner, the outer surface of the piston rod 18 is fixedly connected to a rebound stopper 20, the rebound stopper The block 20 is located above the second piston block 26, the top end of the piston rod 18 passes through the piston oil seal seat 10 and extends to the top of the working cylinder 19, the top end of the piston rod 18 is fixedly connected to the support plate 13, the upper surface of the support plate 13 is fixedly connected to the first mounting head 14, the bottom surface of the oil storage cylinder 1 is fixedly connected to the second mounting head 9, the outer surface of the oil storage cylinder 1 is fixedly inlaid with an annularly arranged heat conducting block 2, the outer surface of the bottom end of the oil storage cylinder 1 is fixedly connected to the support plate 7, the outer surface of the oil storage cylinder 1 is provided with a first shock-absorbing spring 4, the bottom end of the first shock-absorbing spring 4 is fixedly connected to the upper surface of the support plate 7, the top end of the first shock-absorbing spring 4 is fixedly connected to the bottom surface of the support plate 13, the outer surface of the piston rod 18 is fixedly connected to the second shock-absorbing spring 12, the bottom end of the second shock-absorbing spring 12 is fixedly connected to the top of the oil storage cylinder 1, and the top end of the second shock-absorbing spring 12 is fixedly connected to the bottom surface of the support plate 13.
[0021] In this embodiment, the interior of the working cylinder 19 is filled with hydraulic oil, and the interior of the oil storage cylinder 1 is filled with hydraulic oil and nitrogen. The nitrogen is located on the upper part of the hydraulic oil. The compressible characteristics of nitrogen facilitate the effective compression operation of the hydraulic oil. A group of heat dissipation fins 3 are fixedly inlaid on the outer surface of each heat conducting block 2. The heat dissipation fins 3 are made of aluminum and can assist in heat dissipation and increase the heat dissipation effect of the hydraulic oil inside the oil storage cylinder 1. The left side of the first mounting head 14 is fixedly connected with a model mark 15. The model mark 15 is located in the middle of the first mounting head 14, which can explain the model of this shock absorber and facilitate people's use of this shock absorber.
[0022] The outer surface of the piston rod 18 is covered with a telescopic dust-proof sleeve 11. The telescopic dust-proof sleeve 11 is made of rubber and can provide external dust protection for the piston rod 18 to prevent external dust from entering the interior of the working cylinder 19. The top outer surface of the piston rod 18 is fixedly connected to the limiting column 16. The bottom end of the limiting column 16 is snap-fitted to the top of the telescopic dust-proof sleeve 11, which can support the top of the telescopic dust-proof sleeve 11 and facilitate the stable use of the telescopic dust-proof sleeve 11. The top outer surface of the second mounting head 9 is covered with a damping protective sleeve 8. The top of the damping protective sleeve 8 is fixedly connected to the bottom surface of the oil storage cylinder 1, which can protect the bottom of the oil storage cylinder 1.
[0023] The outer surface of the bottom end of the oil storage cylinder 1 is fixedly connected with a ring-arranged stabilizing block 17, and the top of each stabilizing block 17 is fixedly connected to the bottom surface of the support plate 7, which can support and fix the support plate 7, thereby facilitating the stable support of the first shock-absorbing spring 4. The upper surface of the support plate 7 is fixedly connected with two gripping handles 6, which are made of metal. The outer surface of each gripping handle 6 is fixedly connected with an anti-slip sleeve 5, which is made of rubber, so that the staff can pick up the shock absorber more conveniently, thereby facilitating the installation of the shock absorber.
[0024] When in use, first install the base compression valve seat 24 to the bottom of the working cylinder 19, and weld the working cylinder 19 to the inside of the oil storage cylinder 1, install the piston rod 18 to the inside of the working cylinder 19 through the first piston block 21, the rebound block 20 and the piston oil seal seat 10, and install the second damping spring 12 and the first damping spring 4 to the piston rod 18 and the outside of the oil storage cylinder 1 in turn, and weld the first mounting head 14 to the support plate 13, and install the second mounting head 9 to the bottom of the oil storage cylinder 1 to complete the assembly of this buffer shock absorber. During use, the hydraulic oil compressed up and down is used to enter and exit the first serpentine oil hole 22 and the second serpentine oil hole 27 to achieve hydraulic oil rebound damping of the piston rod 18. The buffering cooperation of the first damping spring 4, the second damping spring 12 and the damping rubber seat 25 is used to achieve buffering and vibration reduction of this shock absorber. At the same time, the heat conducting block 2 and the heat dissipating fin 3 are used to absorb and conduct the internal heat of the hydraulic oil, and assist the internal heat of the hydraulic oil to be discharged from the oil storage cylinder 1, thereby achieving heat dissipation and cooling of the hydraulic oil, solving the problem of rapid aging of the hydraulic oil, and achieving safe and stable use of this shock absorber.
[0025] In the description of the present invention, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further restriction, the elements defined by the statement "comprising a reference structure" do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. It should be noted that, in this article, relational terms such as "first", "second", etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.
[0026] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A hydraulic recovery buffer double-tube shock absorber with good vibration reduction performance, characterized in that: include: An oil storage cylinder (1), wherein the inner wall of the oil storage cylinder (1) is fixedly connected to a working cylinder (19), the working cylinder (19) is filled with hydraulic oil, the inner wall of the top end of the working cylinder (19) is fixedly connected to a piston oil seal seat (10), the inner wall of the bottom end of the oil storage cylinder (1) is fixedly inlaid with a base compression valve seat (24), and the upper surface of the base compression valve seat (24) is fixedly connected to a damping rubber seat (25); A piston rod (18), the piston rod (18) passes through the working cylinder (19), the lower outer surface of the piston rod (18) is fixedly sleeved with a first piston block (21) and a second piston block (26) from bottom to top, the first piston block (21) and the second piston block (26) both form a sealed piston with the inner wall of the working cylinder (19), the first piston block (21) is provided with a plurality of first serpentine oil holes (22) arranged in an annular manner, the second piston block (26) is provided with a plurality of second serpentine oil holes (27) arranged in an annular manner, the first serpentine oil holes (22) and the second serpentine oil holes (27) are used for hydraulic oil to pass through the piston and generate corresponding damping effect, the top end of the piston rod (18) extends to the outside of the working cylinder (19) and is fixedly connected to a support plate (13), the upper surface of the support plate (13) is provided with a first mounting head (14); a rebound stopper (20), the rebound stopper (20) being fixedly sleeved on the outer surface of the piston rod (18) and located above the second piston block (26), the rebound stopper (20) being used to limit the axial displacement of the second piston block (26) along the piston rod (18); a second mounting head (9), the second mounting head (9) being fixed to the bottom surface of the oil storage cylinder (1); A heat dissipation structure, comprising a plurality of heat-conducting components fixedly embedded in the outer surface of the oil storage cylinder (1) and arranged in an annular arrangement, wherein the heat-conducting components comprise heat-conducting blocks (2) and heat-dissipating fins (3) fixedly connected to each other; The vibration damping assembly comprises a first vibration damping spring (4) sleeved on the outer surface of an oil storage cylinder (1) and a second vibration damping spring (12) sleeved on the outer surface of a piston rod (18), wherein the first vibration damping spring (4) has two ends connected to a support plate (7) and a support disk (13) respectively, and the second vibration damping spring (12) has two ends connected to the top end of the oil storage cylinder (1) and the support disk (13) respectively.
2. A hydraulic recovery buffer double-tube shock absorber with good vibration reduction performance according to claim 1, characterized in that: The oil storage cylinder (1) is filled with hydraulic oil and nitrogen located above the hydraulic oil, and the nitrogen compensates for volume changes of the hydraulic oil through compressibility.
3. The hydraulic recovery buffer double-tube shock absorber with good vibration reduction performance according to claim 1, characterized in that: A group of aluminum heat dissipation fins (3) is fixedly embedded on the outer surface of each heat-conducting block (2), and each group of heat dissipation fins (3) is distributed in a radial array.
4. The hydraulic recovery buffer double-tube shock absorber with good vibration reduction performance according to claim 1, characterized in that: The outer surface of the top end of the piston rod (18) is provided with a limiting column (16), and the bottom end of the limiting column (16) is clamped with a rubber-made telescopic dustproof sleeve (11), and the lower end of the telescopic dustproof sleeve (11) forms a dynamic seal with the top end of the oil storage cylinder (1).
5. The hydraulic recovery buffer double-tube shock absorber with good vibration reduction performance according to claim 1 is characterized in that: The outer surface of the second mounting head (9) is covered with a damping protective sleeve (8), and the top end of the damping protective sleeve (8) is fixedly connected to the bottom surface of the oil storage cylinder (1) through interference fit.
6. The hydraulic recovery buffer double-tube shock absorber with good vibration reduction performance according to claim 1, characterized in that: An annularly arranged stabilizing block (17) is fixed to the outer surface of the bottom end of the oil storage cylinder (1); the stabilizing block (17) is a triangular supporting structure, and the top end is fixedly connected to the bottom surface of the support plate (7).
7. The hydraulic recovery buffer double-tube shock absorber with good vibration reduction performance according to claim 1, characterized in that: Two metal gripping handles (6) are symmetrically fixed on the upper surface of the support plate (7), and the outer surface of the gripping handles (6) is covered with a rubber anti-slip cover (5) with convex patterns.
8. The hydraulic recovery buffer double-tube shock absorber with good vibration reduction performance according to claim 1, characterized in that: A model mark (15) is provided on the left side of the first mounting head (14), and the model mark (15) is located in the middle of the first mounting head (14).
9. The hydraulic recovery buffer double-tube shock absorber with good vibration reduction performance according to claim 1, characterized in that: The spiral angles of the first serpentine oil hole (22) and the second serpentine oil hole (27) are 45°±5° and 135°±5° respectively, the two oil holes have opposite rotation directions and a cross-sectional area ratio of 1:1.2-1.
5.
10. The hydraulic recovery buffer double-tube shock absorber with good vibration reduction performance according to claim 1, characterized in that: The damping rubber seat (25) is made of a polyurethane-graphene composite material, and its compression elastic modulus is 50-80 MPa.