NL2029819B1

NL2029819B1 - Tensile support apparatus

Info

Publication number: NL2029819B1
Application number: NL2029819A
Authority: NL
Inventors: Chen Junjie; Niu Hao; Tang Jun; Guo Bin; Wang Qiliang; Tan Jianping
Original assignee: Univ Jiangxi Sci & Technology; Univ Central South
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2023-06-13

Abstract

The present invention discloses a tensile support apparatus, which makes full use of the features of the integral structure of three support bars, such as light weight, simple 5 structure and compact volume, and realizes the compression of the distance between a load platform and a foundation platform under the condition of not changing the length of the support bar through the sliding of a pressure-bearing sliding block deVice so as to achieve Vibration attenuation.

Description

TENSILE SUPPORT APPARATUS

TECHNICAL FIELD

[01] The present invention relates to the field of damping technologies, and in particular, to a tensile support apparatus.

BACKGROUND ART

[02] In the technical fields of rail transit, aerospace and national defense military industry, the requirements for damping and noise reduction, safety and comfort, service life extension, anti-vibration fatigue and impact interference are increasing. For example, ship-borne and airborne equipment are susceptible to foundation vibration interference, resulting in unstable performance. At present, single-direction damping devices, such as wire rope or spring, are mainly used in ship-borne and airborne equipment, but they lack the function of multi-direction damping. The existing multi-direction damping devices mainly adopts an air floatation or magnetic levitation structure, which have more complex structure and more limited application range.

[03] In recent years, some progress has been made in the application of tensile integral structures in vibration attenuation and isolation. For example, in Chinese invention patent application 202010494535.4 “Prismatic tensioned integral quasi-zero stiffness vibration isolator", the spiral spring for providing positive stiffness is directly connected to the bearing platform and the base in the vertical direction, which can be used for stiffness control in the vertical direction, but cannot achieve damping effect against impact from other directions. For example, in Chinese patent

ZL201611002397.3 “Tensile integral vibration isolation mechanism", the multi-direction vibration reduction can be realized, but the rigid-flexible mixed branched chain connected with the compression springs in series is used for supporting the working platform, and the compression deformation direction of the springs is overlapped with the direction of the supporting force provided by the rigid-flexible mixed branched chain, so that there is a problem of insufficient structural rigidity, and the springs can be possibly subjected to the action of shearing force and cannot provide the supporting function under the condition of external oblique vibration impact force; secondly, the piston rod and the spring are fixed in a welding mode, which is not conducive to later maintenance, and it is easy to generate structural deformation during welding, which greatly influenced the positioning precision of the working platform; a hydraulic driver cylinder body in the rigid-flexible mixed branched chain is also required to be fixedly connected with the lower end of a rope, so there is also a problem of inconvenient installation; although the hydraulic drive device used can achieve multi-directional damping and active folding, it will greatly increase the weight of the entire structure, and it also has high requirements on the hydraulic system loop and control, and the control precision of the hydraulic driving is generally not high. Therefore, it is not suitable for vibration isolation and damping of precision instrument platforms.

[04] Therefore, it is a problem to be solved urgently by a person skilled in the art to invent a tensile support apparatus which can effectively isolate multi-directional foundation vibration impacts and can still ensure sufficient supporting rigidity when subjected to oblique vibration impact loads.

SUMMARY

[05] The technical problem to be solved by the present invention is to provide a tensile support apparatus which can effectively isolate multi-directional foundation vibration impacts and can still ensure sufficient support stiffness when subjected to oblique vibration impact loads. To resolve the above problem, the present invention provides the following technical solution:

[06] the present invention discloses a tensile support apparatus, characterized by comprising: a load platform, a foundation platform, three support bars and three sets of pressure-bearing sliding block devices, wherein the three support bars are arranged between the load platform and the foundation platform in a spatially staggered and non-interference manner; the pressure-bearing sliding block device comprises a guide rail base, a sliding block, a lower buffer spring and a sliding block tail stopper, wherein the sliding block tail stopper is fixedly arranged at the tail end of the guide rail base, the sliding block is slidably arranged on the guide rail base, the lower buffer spring is arranged between the sliding block and the sliding block tail stopper, and an initial state of the lower buffer spring is a compressed state, and the three sets of pressure-bearing sliding block devices are Y-shaped and fixed on the foundation platform; the lower ends of the three support bars are respectively hinged to the sliding block via a universal joint, and the upper ends of the three support bars are respectively hinged to the load platform via a universal joint; the upper ends of the three support bars are connected pairwise via an upper stretched spring, and an initial state of the three upper stretched springs is a stretched state; and the adjacent upper and lower ends of the three support bars are connected in a staggered way by tensioning cable-stayed ropes.

[07] Furthermore, an upper socket sleeve is provided at the upper end portion of the support bar, the upper socket sleeve is provided with three upper socket sleeve connection clamping positions, which are respectively used for fixing the two ends of the upper stretched spring and the upper end of the cable-stayed ropes; a lower socket sleeve is provided at the lower end portion of the support bar, the lower socket sleeve is provided with a lower socket sleeve connection clamping position, which fixes the lower end of the cable-stayed ropes.

[08] Furthermore, three connection points of the three support bars hinged to the load platform form an equilateral triangle, and the three sliding blocks hinged to lower ends of the three support bars form an equilateral triangle therebetween; the equilateral triangle formed by the three sliding blocks can be enlarged or reduced as the three sliding blocks slide synchronously.

[09] Furthermore, two of the three upper socket sleeve connection clamping positions on the upper socket sleeve are arranged at an included angle of 60°, and the arrangement direction is adapted to an equilateral triangle formed by three connection points at the upper ends of the three support bars; the other one of the upper socket sleeve connection clamping positions is arranged in the opposite direction of the angular bisector of two of the upper socket sleeve connection clamping positions at an included angle of 60°.

[10] The tensile support apparatus disclosed by the present invention has the following beneficial effects:

[11] by setting three support bars and three sets of pressure-bearing sliding block devices, the apparatus has taken full advantage of the features of the integral structure of three support bars, such as light weight, simple structure and compact volume, and realizes the compression of the distance between a load platform and a foundation platform under the condition of not changing the length of the support bar through the sliding of a pressure-bearing sliding block device so as to achieve vibration attenuation.

[12] The three support bars are arranged between the load platform and the foundation platform in a spatially staggered and non-interference manner, i.e., the three support bars are arranged in a spiral structure, and the three support bars of the spiral structure can drive the load platform to move downwards under the impact force in both the vertical direction and the inclined direction; therefore, the tensile support apparatus can effectively isolate the multi-directional foundation vibration impact, and since the deformation direction of the buffer spring does not coincide with the support direction of the bar member, sufficient support stiffness can still be ensured even when subjected to the oblique vibration impact load.

[13] The tensile support apparatus has no special requirements for the structural members such as the cable-stayed rope, the support bar, the upper stretched spring and the lower buffer spring, and the connection mode thereof is simple and detachable, and itis easy to install and adjust and maintain later, and the supporting stiffness can be effectively adjusted by replacing parts and changing the pre-stress of the spring according to different load and vibration-damping requirements.

BRIEF DESCRIPTION OF THE DRAWINGS

[14] In order to more clearly describe the technical solutions of the examples of the present invention, the accompanying drawings required to describe the examples are briefly described below. Apparently, the accompanying drawings described below are only some examples of the present invention. Those of ordinary skill in the art may 5 further obtain other accompanying drawings based on these accompanying drawings without inventive effort.

[15] FIG. 1 is a schematic structural diagram of a tensile support apparatus according to the present invention;

[16] FIG. 2 is a schematic structural diagram of a pressure-bearing sliding block device in a tensile support apparatus according to the present invention;

[17] FIG. 3 1s a schematic structural diagram of a upper socket sleeve in a ensile support apparatus according to the present invention; and

[18] FIG. 4 is a schematic structural diagram of a lower socket sleeve in a ensile support apparatus according to the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[19] To make a person skilled in the art understand the technical solutions in the embodiments of the present invention better, and make the objectives, features, and advantages of the present invention clearer, the specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[20] It should be noted here that the description of these embodiments is used to help understand the present invention, but are not intended to limit the present invention. Further, the technical features involved in the various examples of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[21] Atensile support apparatus of the present embodiment, with reference to FIGS. 1 to 4, includes: a load platform 1, a foundation platform 2, three support bars 3, and three sets of pressure-bearing sliding block devices 4, wherein the three support bars 3 are arranged between the load platform 1 and the foundation platform 2 in a spatially staggered and non-interference manner, i.e., the three support bars 3 are arranged in a spiral structure, and the three support bars 3 are arranged between the load platform 1 and the foundation platform 2 at an angle of the same size with respect to a vertical direction in a counterclockwise or clockwise direction at the same time, but the three support bars 3 do not interfere with each other.

[22] The pressure-bearing sliding block device 4 comprises a guide rail base 41, a sliding block 42, a lower buffer spring 43 and a sliding block tail stopper 44, wherein the sliding block tail stop 44 is fixedly arranged at the tail end of the guide rail base 41, the sliding block 42 is slidably arranged on the guide rail base 41, the lower buffer spring 43 is arranged between the sliding block 42 and the sliding block tail stopper 44, and an initial state of the lower buffer spring 43 is a compressed state; and three sets of pressure-bearing sliding block devices 4 are Y-shaped and fixed on the foundation platform 2. Wherein the sliding block tail stopper 44 and the guide rail base 41 can be assembled together after being made separately, or can be an integral component, 1.e., the sliding block tail stopper 44 is a part of the guide rail base 41; two ends of the lower buffer spring 43 are respectively clamped or bolted on the sliding block 42 and the sliding block tail stopper 44; the guide rail base 41 has two rails, and the sliding block 42 is provided with two corresponding and adapted guide grooves; the three sets of pressure-bearing sliding block devices 4 are Y-shaped and fixed on the foundation platform 2, namely, the corresponding points of the three sets of pressure-bearing sliding block devices 4 form an equilateral triangle.

[23] The lower ends of the three support bars 3 are respectively hinged to the sliding block 42 via a universal joint 5, and the upper ends of the three support bars 3 are respectively hinged to the load platform 1 via a universal joint 5; the upper ends of the three support bars 3 are connected pairwise via an upper stretched spring 6, and an initial state of the three upper stretched springs 6 is a stretched state; and the adjacent upper and lower ends of the three support bars 3 are connected in a staggered way by tensioning cable-stayed ropes 7. Wherein the adjacent upper and lower ends of the three support bars 3 are connected in a staggered way by tensioning cable-stayed ropes 7, namely, the upper end of the first support bar 3 is connected to the lower end of the second support bar 3 by means of a cable-stayed rope 7, the upper end of the second support bar 3 1s connected to the lower end of the third support bar 3 by means of a cable-stayed rope 7, and the upper end of the third support bar 3 is connected to the lower end of the first support bar 3 by means of a cable-stayed rope 7.

[24] As a preferred embodiment, the upper end portion of the support bar 3 is provided with an upper socket sleeve 31, the upper socket sleeve 31 is provided with three upper socket sleeve connection clamping positions 311, and the three upper socket sleeve connection clamping positions 311 are respectively used for fixing the proximal ends of the two upper stretched springs 6 connected thereto and the upper end of the cable-stayed rope 7; the lower end of the support bar 3 is provided with a lower socket sleeve 32, the lower socket sleeve 32 is provided with a lower socket sleeve connection clamping position 321, and the lower socket sleeve connection clamping position 321 fixes the lower end of the cable-stayed rope 7. Wherein the upper socket sleeve connection clamping position 311 and the lower socket sleeve connection clamping position 321 can be directly connected to the upper stretched spring 6 and the cable-stayed rope 7, or can be connected to the upper stretched spring 6 and the cable-stayed rope 7 after a hook or a bolt member is respectively installed.

[25] Preferably, three connection points of the three support bars 3 hinged to the load platform 1 form an equilateral triangle, and the three sliding blocks 42 hinged to the lower ends of the three support bars 3 form an equilateral triangle therebetween; the equilateral triangle formed by the three sliding blocks 42 can be enlarged or reduced as the three sliding blocks 42 slide synchronously.

[26] Preferably, two of the three upper socket sleeve connection clamping positions 311 on the upper socket sleeve 31 are arranged at an included angle of 60°, and the arrangement direction is adapted to an equilateral triangle formed by three connection points at the upper ends of the three support bars 3; the other one of the upper socket sleeve connection clamping positions 311 is arranged in the opposite direction of the angular bisector of the angles of the two upper socket sleeve connection clamping positions 311 at an included angle of 60°. In this way, the three upper stretched springs 6 are connected to the three upper socket sleeve connection clamping positions 311 in a uniformly deformed state, without the symmetry of the structure being destroyed by the uncoordinated deformation.

Claims

Conclusions

Tensile support device, characterized by comprising the following: a load platform, a foundation platform, three support bars and three sets of pressure-bearing shear block devices, the three support bars being arranged between the load platform and the foundation platform in a spatially offset and non- interfering way; wherein the pressure-bearing slide block arrangement comprises a guide rail base, a slide block, a lower buffer spring and a slide block tail stopper, the slide block tail stopper being fixedly arranged on the tail end of the guide rail base, the slide block being slidably arranged on the guide rail base, the lower buffer spring being arranged between the slide block and the slide block tail stopper and wherein an original state of the lower buffer spring is a compressed state and wherein the three sets of pressure-bearing slide block devices are Y-shaped and fixed on the foundation platform; wherein the lower ends of the three support bars are respectively hinged to the sliding block via a universal joint and the upper ends of the three support bars are respectively hinged to the cargo platform via a universal joint; wherein the upper ends of the three support bars are connected in pairs via an upper stretched spring and wherein an original state of the three upper stretched springs is a stretched state; and wherein the adjacent upper and lower ends of the three support rods are connected in an offset fashion by stretching cable-carried ropes.

A pull assist device according to claim 1, characterized in that an upper sock sleeve is provided on the upper end portion of the support bar, the upper sock sleeve having three upper sock sleeve connecting clamp positions, respectively used for attaching the two ends of the upper stretched spring and the top end of the cable-carried ropes.

3. A traction support apparatus according to claim 2, characterized in that three connection points of the three support bars hinged to the cargo platform form an equilateral triangle and the three skid blocks hinged to the lower ends of the three support bars form an equilateral triangle therebetween.