Buffering and damping device
Patent Information
- Application Number
- CN202510156289.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2025-05-30
Smart Images
Figure CN120062268A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of vibration damping, and particularly to a buffer vibration damping device. Background Art
[0002] Buffer materials or devices are widely used in many fields, especially playing an important role in industries such as aerospace, automotive, construction, logistics transportation, and biomedicine. In the aerospace field, buffer vibration damping devices can be used in links such as airdropping and landing to avoid damage to materials, ensure personnel safety, and ensure the smooth landing of spacecraft. With the development of China's aerospace technology, future lunar exploration and base construction will require efficient vibration damping devices to ensure the safety of transportation and material delivery.
[0003] In addition, with the development of the economy and the increasing demand for tourism and logistics, buffer vibration damping devices also have important applications in aspects such as automotive, railway transportation, transportation of online shopping goods, and travel comfort. These devices can reduce the damage caused by bumps, improve the safety of items during transportation and the comfort of passengers, thus playing an important role in the civilian field.
[0004] Currently, commonly used buffer materials and devices include honeycomb materials, buffer airbags, and mechanical buffer devices. Honeycomb materials absorb energy through elastic deformation, stress plateau stage, and densification stage, with lightweight design and good energy absorption performance, but they lose their function after crushing and have the disadvantage of being disposable. Buffer airbags can effectively reduce strong impacts, but due to their physical characteristics, they are prone to causing the carrier to lose control, tip over, or bounce back, thereby causing damage to the carrier. Mechanical buffer devices combine springs and hydraulic systems, which can quickly damp vibration and absorb energy, but they have complex structures, large masses, and are prone to damage and oil leakage. Summary of the Invention
[0005] In view of this, the present invention proposes a buffer vibration damping device to solve the deficiencies of existing buffer vibration damping devices in terms of impact absorption ability, reusability, and structural complexity.
[0006] The technical solution of the present invention is realized as follows:
[0007] The present invention provides a buffer vibration damping device, comprising:
[0008] A first cylinder, the first cylinder having a first installation cavity with an open top, and a first mating surface on the outer peripheral side of the top of the first cylinder;
[0009] The second cylinder body includes a cylindrical cylinder body. The cylindrical cylinder body has a second installation cavity with an open bottom. The bottom of the cylindrical cylinder body has an annular cylinder body arranged coaxially with the cylindrical cylinder body. The inner side surface of the annular cylinder body has a second mating surface, and the second mating surface is used for sleeving outside the first mating surface. A plurality of through slits are evenly distributed on the surface of the annular cylinder body, and the length direction of the through slits is parallel to the axial direction of the annular cylinder body. The plurality of through slits divide the annular cylinder body into a plurality of elastic claw pieces;
[0010] Among the first mating surface and the second mating surface, at least one mating surface is a conical surface. The annular cylinder body can slide axially along the first mating surface, and the elastic claw pieces elastically deform radially along the first mating surface;
[0011] At least one elastic member is arranged between the first cylinder body and the second cylinder body. One end of the elastic member is connected to the bottom surface of the first installation cavity, and the other end is connected to the bottom surface of the second installation cavity.
[0012] On the basis of the above technical solution, preferably, the second cylinder body is made of a shape memory alloy material.
[0013] On the basis of the above technical solution, preferably, the first cylinder body is made of a shape memory alloy material.
[0014] On the basis of the above technical solution, preferably, the inner diameter of the top end of the annular cylinder body is greater than the inner diameter of the second installation cavity, the outer diameter of the top of the first cylinder body is greater than the inner diameter of the second installation cavity and less than the inner diameter of the bottom end of the annular cylinder body.
[0015] On the basis of the above technical solution, preferably, the first mating surface or the second mating surface is a conical surface, and the angle between the first mating surface or the second mating surface and the vertical direction is greater than 1°.
[0016] On the basis of the above technical solution, preferably, both the first mating surface and the second mating surface are conical surfaces. The angle between the first mating surface and the vertical direction is α1, and the angle between the second mating surface and the vertical direction is α2, where α1 is greater than α2.
[0017] On the basis of the above technical solution, preferably, the value range of α2 is 1° to 10°.
[0018] On the basis of the above technical solution, preferably, at least a part of the annular cylinder body is sleeved outside the first mating surface. The length of the annular cylinder body is greater than the height of the first mating surface in the axial direction and less than the length of the first cylinder body.
[0019] On the basis of the above technical solution, preferably, the compression stroke of the elastic member is greater than the height between the top surface of the first cylinder body and the cylindrical cylinder body.
[0020] On the basis of the above technical solution, preferably, a guiding protrusion matching with the through slit is arranged on the first mating surface, and is used for restricting the circumferential rotation of the second cylinder body when the second cylinder body axially moves relative to the first cylinder body.
[0021] The present invention has the following beneficial effects compared with the prior art:
[0022] (1) The buffer and shock absorption device disclosed by the present invention divides the annular cylinder body into elastic claw pieces through a plurality of through slits, and enables the elastic claw pieces and the conical mating surface to interact with each other, and can generate radial elastic deformation under the action of an external impact force, so as to effectively disperse the impact force and improve the impact absorption capacity of the device. The use of the elastic member, the design of the conical mating surface and the elastic deformation function of the elastic claw pieces work together to ensure that the buffer and shock absorption device can return to its original state after multiple uses and has high reusability. In addition, the device uses a simple structural design, reduces the need for complex components, and thus simplifies the overall structure of the device.
[0023] (2) By setting the materials of the first cylinder body and the second cylinder body as shape memory alloys, during buffering and shock absorption, the deformation and recovery capabilities of the shape memory alloys can enhance the overall shock absorption effect of the device. At the same time, the material characteristics of the shape memory alloys enable the sizes and shapes of the first and second cylinder bodies to remain relatively stable during use, avoiding deformation problems caused by long-term use, fatigue or temperature changes, and further improving the reliability and stability of the entire shock absorption device.
[0024] (3) Since the angle of the second mating surface is smaller than that of the first mating surface, it is ensured that the second mating surface and the first mating surface will not be parallel and in contact. When the annular cylinder body slides axially along the first mating surface, the radial shear strain applied by the first mating surface to the second mating surface causes the elastic claw pieces to gradually expand outwards. During this process, the elastic claw pieces not only undergo elastic deformation, but also gradually increase the contact area, so that the vibration impact force can be more widely dispersed and absorbed. During the contact process between the second mating surface and the first mating surface, the gradually increasing contact area enables the vibration and impact force to be transmitted to the first cylinder body in addition to the elastic deformation of the elastic claw pieces to buffer and absorb energy, which enables the first cylinder body to also participate in the shock absorption process. In this way, the shock absorption performance of the entire device is improved, and it can better cope with large-amplitude vibration impacts.
[0025] (4) By setting the compression stroke of the elastic member to be greater than the height between the top surface of the first cylinder and the cylindrical cylinder, under the action of a large vibration impact force, the top surface of the first cylinder and the bottom surface of the cylindrical cylinder can come into contact, thereby further generating a positive strain and deforming to absorb energy. At the same time, when the buffer and shock absorption device needs to recover from the compressed state, in addition to the superelastic effect of the shape memory alloy material, the elastic force of the elastic member acting outward also plays a certain role in restoring the original shape and size.
[0026] (5) By providing guiding protrusions on the first mating surface that cooperate with the through-slots, when the second cylinder moves axially along the first cylinder, the guiding protrusions on the first mating surface will enter the through-slots. The guiding protrusions and the through-slots play an axial guiding role, enabling the second cylinder to only move axially relative to the first cylinder without circumferential rotation, thus avoiding changes in the carrying posture. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0028] Figure 1 A three-dimensional structural schematic diagram of the buffer and shock absorption device disclosed in the present invention;
[0029] Figure 2 An exploded view of the buffer and shock absorption device disclosed in the present invention;
[0030] Figure 3 A three-dimensional structural schematic diagram of the second cylinder disclosed in the present invention;
[0031] Figure 4 A first structural planar cross-sectional view of the buffer and shock absorption device disclosed in the present invention;
[0032] Figure 5 A second structural planar cross-sectional view of the buffer and shock absorption device disclosed in the present invention;
[0033] Figure 6 A third structural planar cross-sectional view of the buffer and shock absorption device disclosed in the present invention;
[0034] Figure 7 Another three-dimensional structural schematic diagram of the buffer and shock absorption device disclosed in the present invention;
[0035] Reference Signs:
[0036] 1. First cylinder; 11. First installation cavity; 12. First mating surface; 121. Guide protrusion; 2. Second cylinder; 21. Cylindrical cylinder; 210. Second installation cavity; 22. Annular cylinder; 221. Second mating surface; 222. Through slit; 220. Elastic claw; 3. Elastic member. Detailed implementation
[0037] The following will describe clearly and completely the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0038] As Figure 1 shown, in combination with Figure 3 , an embodiment of the present invention discloses a buffer and vibration damping device, including a first cylinder 1, a second cylinder 2 and at least one elastic member 3.
[0039] Among them, the first cylinder 1 is a cylindrical structure. The first cylinder 1 has a first installation cavity 11 with an open top, which is used to provide a receiving space for the elastic member 3. A first mating surface 12 is provided on the outer peripheral side of the top of the first cylinder 1, and the first mating surface 12 is used for mating connection with the first cylinder 1. During actual use, the first cylinder 1 is installed on a first target object that needs buffer and vibration damping.
[0040] The second cylinder 2 includes a cylindrical cylinder 21. The cylindrical cylinder 21 has a second installation cavity 210 with an open bottom, which is used to provide a receiving space for the elastic member 3. A bottom of the cylindrical cylinder 21 is provided with an annular cylinder 22 coaxial with the cylindrical cylinder 21. The annular cylinder 22 has an open bottom end, and the annular cylinder 22 and the second installation cavity 210 are axially communicated, so that the elastic member 3 can pass through the annular cylinder 22 and enter the inside of the second installation cavity 210.
[0041] The inner side surface of the annular cylinder 22 has a second mating surface 221. The annular cylinder 22 is used to sleeved outside the first mating surface 12 of the first cylinder 1 through the second mating surface 221 to realize the assembly of the second cylinder 2 and the first cylinder 1. At the same time, axial sliding can be realized between the two cylinders.
[0042] At least one elastic member 3 is disposed between the first cylinder 1 and the second cylinder 2. One end of the elastic member 3 is connected to the bottom surface of the first installation cavity 11, and the other end is connected to the bottom surface of the second installation cavity 210. In this embodiment, the two ends of the elastic member 3 are fixedly connected to the bottom surfaces of the first installation cavity 11 and the second installation cavity 210 respectively. Thus, a fixed connection relationship is established between the first cylinder 1 and the second cylinder 2 through the elastic member 3, preventing the elastic member 3 from detaching between the first cylinder 1 and the second cylinder 2.
[0043] The function of the elastic member 3 is to provide a buffering and vibration damping effect, and at the same time provide an additional elastic restoring force. When the second cylinder 2 moves relative to the first cylinder 1, the elastic member 3 can help restore the original position and increase the reusability of the device. This design enhances the stability and durability of the device, and helps with the rebound and performance recovery after long-term use. In this embodiment, the elastic member 3 is a compression spring, an airbag, a gas spring, a foam material, a magnetic elastic element, or a metal bellows, etc.
[0044] In this embodiment, a plurality of through slits 222 are evenly distributed on the surface of the annular cylinder 22. The through slits 222 penetrate from the outer surface of the annular cylinder 22 to the inner surface of the annular cylinder 22. The length direction of the through slits 222 is parallel to the axial direction of the annular cylinder 22. The plurality of through slits 222 divide the annular cylinder 22 into a plurality of elastic claw pieces 220.
[0045] Since the elastic claw pieces 220 are separated by the through slits 222, when the second mating surface 221 is subjected to a radial squeezing force, the elastic claw pieces 220 can deform radially, thereby effectively absorbing and dispersing the external vibration impact force. Designing into a plurality of segmented elastic claw pieces 220 can uniformly absorb and effectively absorb the vibration impact, enhancing the buffering and vibration damping ability of the overall structure.
[0046] In this embodiment, at least one of the first mating surface 12 and the second mating surface 221 is a conical surface. The annular cylinder 22 can slide axially along the first mating surface 12, and the elastic claw pieces 220 can elastically deform radially along the first mating surface 12.
[0047] The design of the conical mating surface can effectively guide the second cylinder 2 to slide axially on the first cylinder 1, and the contact of the conical surface can ensure the stability of the fit. In addition, the mating design of the first mating surface 12 and the elastic claw pieces 220 enables the elastic claw pieces 220 to elastically deform radially during axial sliding, thereby better absorbing the impact force.
[0048] During actual use, the second cylinder body 2 is also installed on a second target object to be buffered and vibration-damped. More specifically, the second target object is an object with strong vibration. During the vibration of the second target object, the vibration impact force will act on the second cylinder body 2, causing the second cylinder body 2 to move relative to the first cylinder body 1. When the second cylinder body 2 axially moves relative to the first cylinder body 1, the elastic member 3 buffers and absorbs energy. At the same time, the elastic claw pieces 220 undergo elastic deformation, thereby absorbing the vibration impact force and improving the buffer and vibration-damping effect of the device.
[0049] The buffer and vibration-damping device disclosed in this embodiment divides the annular cylinder body 22 into elastic claw pieces 220 through a plurality of through slits 222, and enables the elastic claw pieces 220 to interact with the conical mating surface, capable of generating radial elastic deformation under the action of an external impact force, thereby effectively dispersing the impact force and enhancing the impact absorption capacity of the device. The use of the elastic member 3, the design of the conical mating surface, and the elastic deformation function of the elastic claw pieces 220 work together to ensure that the buffer and vibration-damping device can return to its original state after multiple uses and has high reusability. In addition, the device uses a simple structural design, reducing the need for complex components, thereby simplifying the overall structure of the device.
[0050] In order to enable the elastic claw pieces 220 to undergo elastic deformation for buffering and energy absorption and be able to return to their original state after use, the material of the second cylinder body 2 in this embodiment is set as a shape memory alloy.
[0051] Since the shape memory alloy has good elasticity and deformation ability, under the action of an external force, it can quickly adapt and restore its shape, which makes the vibration-damping performance of the second cylinder body 2 more efficient. Especially when buffering and absorbing impacts, the deformation and recovery ability of the alloy can enhance the overall vibration-damping effect of the device. At the same time, the material characteristics of the shape memory alloy make the size and shape of the second cylinder body 2 remain relatively stable during use, avoiding deformation problems caused by long-term use, fatigue, or temperature changes, and further improving the reliability and stability of the entire vibration-damping device.
[0052] In this embodiment, the shape memory alloy includes but is not limited to Ni-Ti based alloys, Fe-based alloys, Cu-based alloys, etc.
[0053] In the above embodiment, in the initial state, the annular cylinder body 22 is sleeved on the first mating surface 12, and the elastic claw pieces 220 wrap the first mating surface 12. Since at least one of the first mating surface 12 and the second mating surface 221 is conically arranged, the elastic claw pieces 220 have a certain directionality when axially sliding along the first mating surface 12, which is not easy to make the object unstable, and buffer and damp the vibration impacts in the vertical and surrounding directions through the shear strain of the elastic claw pieces 220 themselves.
[0054] In this embodiment, when the external force is small, the buffer and vibration reduction are mainly achieved by the shear strain of the elastic claw piece 220 and the elastic deformation of the elastic member 3. When the external force is large, the compression amount of the elastic member 3 is large. At this time, when the top surface of the first cylinder 1 contacts the bottom surface of the cylindrical cylinder 21, a normal strain is generated, and the elastic deformation of the elastic member 3 is combined to jointly perform the buffer and vibration reduction functions, so that the structure has two levels during the buffer and vibration reduction process.
[0055] In order to enable the second cylinder 2 and the first cylinder 1 to generate normal strain better, the material of the first cylinder 1 is also set as a shape memory alloy in this embodiment. In this way, both the second cylinder 2 and the first cylinder 1 are made of memory alloy materials, avoiding the situation where only the second cylinder 2 deforms when the first cylinder 1 is made of rigid material. This enables them to perform elastic deformation better during normal strain, greatly improving the buffer and vibration reduction performance of the device.
[0056] In order to enable the top surface of the first cylinder 1 to contact the bottom surface of the cylindrical cylinder 21 to generate normal strain under a large impact force, the inner diameter of the top end of the annular cylinder 22 is set to be larger than the inner diameter of the second installation cavity 210 in this embodiment. At the same time, the outer diameter of the top of the first cylinder 1 is larger than the inner diameter of the second installation cavity 210 and smaller than the inner diameter of the bottom end of the annular cylinder 22.
[0057] In this way, the annular cylinder 22 can be sleeved on the outer side of the upper part of the first cylinder 1. Under a small impact force, the annular cylinder 22 slides along the axial direction of the first mating surface 12. At the same time, under the action of the conical mating surface, the elastic claw piece 220 undergoes radial shear strain while sliding axially, and jointly performs the buffer and vibration reduction functions with the elastic deformation of the elastic member 3. When the impact force is large, the distance between the second cylinder 2 and the first cylinder 1 gradually decreases until the top surface of the first cylinder 1 contacts the bottom surface of the cylindrical cylinder 21 and generates normal strain, and at the same time, the elastic deformation of the elastic member 3 is combined to further perform a greater buffer and vibration reduction function.
[0058] In the above embodiment, by setting the mating dimensions of the annular cylinder 22 and the first cylinder 1, the second cylinder 2 can be sleeved on the first cylinder 1 and move along the axial direction. At the same time, the contact between the top end of the first cylinder 1 and the bottom surface of the cylindrical cylinder 21 can be realized, and the grading mechanism during the buffer and vibration reduction process can be achieved.
[0059] As a first implementation manner, referring to the attached Figure 4 As shown, the first mating surface 12 is a circular vertical surface, the second mating surface 221 is a conical surface, and the diameter of the second mating surface 221 gradually increases from the upper end to the lower end of the annular cylinder 22.
[0060] With this setting, the annular cylinder body 22 is sleeved on the outer side of the top of the first cylinder body 1. At this time, the inner circumferential side of the annular cylinder body 22 is in a trumpet shape. When the entire buffer and shock absorption device is subjected to vibration impact force, the second cylinder body 2 moves relative to the first cylinder body 1 in the axial direction. During this process, the top edge of the first cylinder body 1 comes into contact with the second mating surface 221, and the top edge of the first cylinder body 1 will generate a radial shear stress on the elastic claw 220, thereby causing the elastic claw 220 to undergo elastic deformation, and buffering and damping the vibration impact force while the elastic member 3 undergoes elastic deformation.
[0061] In this embodiment, when the second cylinder body 2 moves downward along the first cylinder body 1, the first cylinder body 1 will slide upward along the second mating surface 221. During this process, the edge of the first cylinder body 1 will generate an increasingly strong radial shear strain on the elastic claw 220. At the same time, the top surface of the first cylinder body 1 will approach the bottom surface of the cylindrical cylinder body 21. However, since the second mating surface 221 forms a certain angle with the vertical direction, the first cylinder body 1 will only approach the bottom surface of the cylindrical cylinder body 21 infinitely, but it is difficult to achieve contact between the first cylinder body 1 and the bottom surface of the cylindrical cylinder body 21. Only when the impact force is large enough and the elastic claw 220 undergoes a large radial elastic deformation, the top surface of the first cylinder body 1 will contact the bottom surface of the cylindrical cylinder body 21.
[0062] However, during the above elastic deformation process, this may cause a large stress deformation at the connection between the elastic claw 220 and the cylindrical cylinder body 21 after the elastic claw 220 undergoes a large radial elastic deformation, resulting in the elastic claw 220 not being able to recover well after stress deformation.
[0063] Therefore, the present invention provides a second embodiment. Specifically, as shown in the attached Figure 5 figure, the first mating surface 12 is a conical surface, the second mating surface 221 is a circular vertical surface, and the diameter of the first mating surface 12 gradually increases from the upper end to the lower end of the first cylinder body 1.
[0064] With this setting, the annular cylinder body 22 is sleeved on the outer side of the first mating surface 12. At this time, the bottom edge of the annular cylinder body 22 comes into contact with the first mating surface 12 of the conical structure. When the entire buffer and shock absorption device is subjected to vibration impact force, the second cylinder body 2 moves relative to the first cylinder body 1 in the axial direction. During this process, the bottom of the elastic claw 220 slides along the first mating surface 12 in the axial direction. Since the diameter of the first mating surface 12 gradually increases from top to bottom, during the sliding process of the elastic claw 220, the first mating surface 12 applies a radial shear strain to the elastic claw 220, thereby causing the elastic claw 220 to expand outward relative to the first mating surface 12, and thus undergo elastic deformation, and buffering and damping the vibration impact force while the elastic member 3 undergoes elastic deformation.
[0065] When the impact force is small, the elastic claw 220 slides along the first mating surface 12 and generates a radial elastic deformation. When the impact force is large, the elastic claw 220 completely crosses the first mating surface 12. At this time, the inner side (the second mating surface 221) of the entire elastic claw 220 contacts the bottom edge of the first mating surface 12. At the same time, the top end of the first cylinder 1 and the bottom end of the cylindrical cylinder 21 contact each other to generate a positive strain, and at the same time, the elastic deformation of the elastic member 3 is further used for buffering and vibration reduction with a greater force.
[0066] In the above two embodiments, the angle between the first mating surface 12 or the second mating surface 221 and the vertical direction is greater than 1°. With this setting, the situation where both mating surfaces are vertical planes can be avoided. Because if both mating surfaces are vertical planes, the elastic claw 220 can only slide axially and cannot achieve elastic deformation, thus unable to achieve the buffering and vibration reduction effect.
[0067] It should be noted that in the above two embodiments, the contact between the elastic claw 220 and the first cylinder 1 is a line-plane contact. This contact method makes the contact area between the elastic claw 220 and the first cylinder 1 small, and only absorbs the vibration impact force through the deformation of the elastic claw 220. However, these vibration impact forces cannot be efficiently transmitted to the first cylinder 1, thus reducing the buffering and vibration reduction effect of the device to a certain extent.
[0068] Therefore, the present invention provides a third embodiment. Specifically, referring to the attached Figure 6 As shown, both the first mating surface 12 and the second mating surface 221 are conical surfaces. The angle between the first mating surface 12 and the vertical direction is α1, and the angle between the second mating surface 221 and the vertical direction is α2, where α1 is greater than α2. In this embodiment, the diameter of the first mating surface 12 gradually increases from the upper end to the lower end of the first cylinder 1, and the diameter of the second mating surface 221 gradually increases from the upper end to the lower end of the annular cylinder 22.
[0069] By making both the first mating surface 12 and the second mating surface 221 conical surfaces, when the two mating surfaces contact, as the second cylinder 2 moves, the contact area between the elastic claw 220 and the first mating surface 12 gradually increases, and more effective stress distribution can be achieved. This gradually increasing contact area makes the force on the elastic claw 220 more uniform, thus reducing the stress concentration phenomenon and avoiding excessive stress and damage at a certain point on the elastic claw 220.
[0070] Since the angle of the second mating surface 221 is smaller than that of the first mating surface 12, it is ensured that the second mating surface 221 and the first mating surface 12 will not be in parallel contact. When the annular cylinder body 22 slides along the first mating surface 12 in the axial direction, the radial shear strain applied by the first mating surface 12 to the second mating surface 221 causes the elastic claw pieces 220 to gradually expand outwards. During this process, the elastic claw pieces 220 not only undergo elastic deformation but also gradually increase the contact area, enabling the vibration impact force to be more widely dispersed and absorbed. During the contact process between the second mating surface 221 and the first mating surface 12, the gradually increasing contact area enables, in addition to the deformation of the elastic claw pieces 220 to buffer and absorb energy, the vibration and impact force to be transmitted to the first cylinder body 1, causing the first cylinder body 1 to also participate in the vibration reduction process. In this way, the vibration reduction performance of the entire device is improved, enabling it to better cope with large-amplitude vibration impacts.
[0071] As some embodiments, the value range of α2 is 1° to 10°. Within this value range, it is only necessary to ensure that the minimum angle of α2 is greater than 1°, as long as it is not 0° with respect to the vertical direction, and the maximum angle is not greater than 10°, because the larger the angle, the thinner the wall thickness at the top of the first cylinder body 1 will be, resulting in a small contact area between the first cylinder body 1 and the bottom surface of the columnar cylinder body 21, thereby generating a large stress.
[0072] As some embodiments, at least a part of the annular cylinder body 22 is sleeved outside the first mating surface 12.
[0073] With this setting, in the initial state of the entire device, the lower part of the second cylinder body 2 can be sleeved outside the upper part of the first cylinder body 1, so that the first mating surface 12 can establish a connection relationship with the second mating surface 221. In this way, the second cylinder body 2 and the first cylinder body 1 can be pre-positioned and connected in the initial state, and when the second cylinder body 2 moves along the first cylinder body 1, the two can perform guiding sliding through the first mating surface 12 and the second mating surface 221.
[0074] In some embodiments, the length of the annular cylinder body 22 is greater than the height of the first mating surface 12 in the axial direction. With this arrangement, it can be ensured that the elastic claw 220 has a sufficiently long size and a greater sliding stroke on the first mating surface 12, enabling the elastic claw 220 to completely cross the first mating surface 12. During this process, the first mating surface 12 can fully contact the inner wall of the elastic claw 220, thus fully realizing the radial elastic deformation of the elastic claw 220. At the same time, when the elastic claw 220 crosses the first mating surface 12 and approaches the lower end of the first cylinder body 1, by making the length of the annular cylinder body 22 less than the length of the first cylinder body 1, it can be avoided that the elastic claw 220 extends out of the bottom of the first cylinder body 1, thereby preventing the elastic claw 220 from touching the load on the bottom of the first cylinder body 1. Furthermore, when the top surface of the first cylinder body 1 contacts the bottom surface of the cylindrical cylinder body 21, the bottom end of the elastic claw 220 does not cross the bottom of the first cylinder body 1.
[0075] In some preferred embodiments, the compression stroke of the elastic member 3 is greater than the height between the top surface of the first cylinder body 1 and the cylindrical cylinder body 21. Specifically, the height between the top surface of the first cylinder body 1 and the cylindrical cylinder body 21 is h. By setting the above scheme, when the top surface of the first cylinder body 1 contacts the bottom surface of the cylindrical cylinder body 21 and the vibration impact force still exists at this time, the first cylinder body 1 and the second cylinder body 2 will further undergo positive strain. Since the first cylinder body 1 and the second cylinder body 2 are made of shape memory alloy, they can further deform to absorb energy. When the buffer and vibration damping device needs to recover from the compressed state, in addition to the superelastic effect of the shape memory alloy material, the outward elastic force of the elastic member 3 also plays a certain role in restoring the original shape and size.
[0076] It should be noted that when the compression stroke of the elastic member 3 is less than the height between the top surface of the first cylinder body 1 and the cylindrical cylinder body 21, when the elastic member 3 is compressed to the limit, the top surface of the first cylinder body 1 cannot contact the bottom surface of the cylindrical cylinder body 21, and thus the further buffer and vibration damping effect cannot be achieved.
[0077] When the first cylinder body 1 and the second cylinder body 2 are respectively connected to the load, under the vibration impact force, the second cylinder body 2 moves axially relative to the first cylinder body 1. Then, the second cylinder body 2 and the first cylinder body 1 are only connected by the elastic member 3, which will cause the second cylinder body 2 to have a circumferential movement when moving axially relative to the first cylinder body 1, resulting in a change in the attitude of the load.
[0078] Therefore, some implementation manners are also provided in this embodiment. Specifically, a guiding protrusion 121 that mates with the through slit 222 is provided on the first mating surface 12, and is used to restrict the circumferential rotation of the second cylinder 2 when it axially moves relative to the first cylinder 1. With this setting, when the second cylinder 2 axially moves along the first cylinder 1, the guiding protrusion 121 on the first mating surface 12 will enter into the through slit 222. The guiding protrusion 121 and the through slit 222 play an axial guiding role, so that the second cylinder 2 can only axially move relative to the first cylinder 1 without circumferential rotation, avoiding the change of the loading posture.
[0079] In the above embodiment, the number of the elastic members 3 can be set according to the size of the load. When the load area is large, multiple elastic members 3 can be provided and evenly distributed between the first cylinder 1 and the second cylinder 2. Refer to the appendix Figure 7 As shown, of course, only one elastic member 3 can also be provided between the first cylinder 1 and the second cylinder 2, but by providing multiple buffer and vibration damping devices to connect the load, such a manner can also achieve the buffer and vibration damping effect.
[0080] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A buffer vibration reduction device, characterized in that: include: A first cylinder (1), the first cylinder (1) having a first installation cavity (11) with an opening at the top, and a first matching surface (12) on the outer peripheral side of the top of the first cylinder (1); The second cylinder (2) comprises a cylindrical cylinder (21), the cylindrical cylinder (21) having a second installation cavity (210) with a bottom opening, the bottom of the cylindrical cylinder (21) having an annular cylinder (22) coaxially arranged with the cylindrical cylinder (21), the inner side surface of the annular cylinder (22) having a second mating surface (221), the second mating surface (221) being used for sleeve-engaging the outer side of the first mating surface (12), a plurality of through slits (222) being evenly distributed on the surface of the annular cylinder (22), and the length direction of the through slits (222) being parallel to the axial direction of the annular cylinder (22), and the plurality of through slits (222) dividing the annular cylinder (22) into a plurality of elastic claws (220); At least one of the first mating surface (12) and the second mating surface (221) is a conical surface, and the annular cylinder (22) can slide axially along the first mating surface (12) and cause the elastic claw piece (220) to undergo elastic deformation radially along the first mating surface (12); At least one elastic member (3), the elastic member (3) being arranged between the first cylinder (1) and the second cylinder (2), one end of the elastic member (3) being connected to the bottom surface of the first installation cavity (11), and the other end of the elastic member (3) being connected to the bottom surface of the second installation cavity (210).
2. The buffer vibration reduction device according to claim 1, characterized in that: The second cylinder (2) is made of shape memory alloy material.
3. The buffer vibration reduction device according to claim 2, characterized in that: The first cylinder (1) is made of shape memory alloy material.
4. The buffer vibration reduction device according to claim 3, characterized in that: The inner diameter of the top end of the annular cylinder (22) is greater than the inner diameter of the second installation cavity (210), and the outer diameter of the top end of the first cylinder (1) is greater than the inner diameter of the second installation cavity (210) and smaller than the inner diameter of the bottom end of the annular cylinder (22).
5. The buffer vibration reduction device according to claim 4, characterized in that: The first mating surface (12) or the second mating surface (221) is a conical surface, and the angle between the first mating surface (12) or the second mating surface (221) and the vertical direction is greater than 1°.
6. The buffer vibration reduction device according to claim 4, characterized in that: The first mating surface (12) and the second mating surface (221) are both conical surfaces, the angle between the first mating surface (12) and the vertical direction is α1, and the angle between the second mating surface (221) and the vertical direction is α2, wherein α1 is greater than α2.
7. The buffer vibration reduction device according to claim 6, characterized in that: The value range of α2 is 1° to 10°.
8. The buffer vibration reduction device according to claim 5 or 6, characterized in that: At least a portion of the annular cylinder (22) is sleeved on the outside of the first matching surface (12), the length of the annular cylinder (22) is greater than the height of the first matching surface (12) in the axial direction, and the length of the annular cylinder (22) is less than the length of the first cylinder (1).
9. The vibration damping device according to claim 8, characterized in that: The compression stroke of the elastic member (3) is greater than the height from the top surface of the first cylinder (1) to the cylindrical cylinder (21).
10. The buffer vibration reduction device according to claim 1, characterized in that: The first matching surface (12) is provided with a guide protrusion (121) matching with the through slit (222) and used for limiting the circumferential rotation of the second cylinder (2) when the second cylinder (2) moves axially relative to the first cylinder (1).