CN218622628U

CN218622628U - Three-dimensional shock insulation energy dissipation support

Info

Publication number: CN218622628U
Application number: CN202223024683.3U
Authority: CN
Inventors: 陈云; 李星; 穆佳佳; 刘涛; 陈娟娟
Original assignee: Hainan Shock Control Intelligent Technology Co ltd; Hainan University
Current assignee: Hainan Shock Control Intelligent Technology Co ltd; Hainan University
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-03-14
Anticipated expiration: 2032-11-15

Abstract

A three-dimensional shock insulation and energy consumption support comprises a lead core support, a lower sleeve, an upper sleeve, a steel stay cable, an energy consumption limiting strip, a first disc-shaped spring and a second disc-shaped spring; a steel inhaul cable is connected between the lower connecting plate and the upper connecting plate of the lead core support; a group of support shafts are arranged in the middle of the upper connecting plate at intervals; the lower sleeve is arranged at the top of the upper connecting plate; a horizontal supporting plate is arranged at the top of the lower sleeve; the horizontal supporting plate is provided with a through hole penetrating through the supporting shaft; the first disc-shaped spring is sleeved on the part of the support shaft between the horizontal support plate and the upper connecting plate; the upper sleeve is arranged at the top of the horizontal support plate; the second disc spring is sleeved on the part of the support shaft in the upper sleeve; a fixing nut is arranged on the supporting shaft and positioned at the top of the second disc spring; the energy consumption limiting strips are arranged between the horizontal supporting plate and the upper connecting plate at intervals along the annular direction. The utility model provides a traditional shock mount be difficult to realize multidimension shock insulation and can't satisfy the technical problem of intensity and stability requirement under the effect of static load and power.

Description

Three-dimensional shock insulation energy dissipation support

Technical Field

The utility model relates to an energy dissipation shock attenuation system technical field, especially a three-dimensional shock insulation power consumption support.

Background

Earthquake is a sudden and destructive natural disaster, which frequently brings huge loss to the development of human society, and poses serious threat to the human society, and is one of the most serious natural disasters. The earthquake zone is a country with high earthquake activity frequency, high intensity, shallow earthquake source and wide distribution between the European and Asian earthquake zones and the Pacific earthquake zone in China, and most of cities in China are located in earthquake areas and are one of the most serious countries in the world. Therefore, how to ensure the safe and reliable operation of the structure under the action of possible earthquake, avoid casualties to the maximum extent, reduce economic loss caused by earthquake disasters becomes a problem of great attention in the engineering field.

In addition, with the development of social economy and construction technology, high-rise and super high-rise building structures, large-span space structures and residential areas close to subways are more and more, and the requirement on structural earthquake resistance is higher and higher. Most of the past shock absorption products only have good shock insulation and absorption effects on horizontal earthquake effects, and have great difficulty in realizing multi-dimensional shock insulation.

Therefore, it is an urgent need of the technical personnel in the field to develop a seismic isolation support which can meet the requirements of horizontal and vertical seismic isolation and has enough bearing capacity to meet the requirements of strength and stability under the action of static load and power.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a three-dimensional shock insulation power consumption support, the technical problem that the realization multidimension shock insulation that is difficult to solve traditional shock mount and can't satisfy intensity and stability requirement under the effect of static load and power.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

A three-dimensional shock insulation and energy consumption support comprises a lead core support, a lower sleeve, an upper sleeve, a steel stay cable, an energy consumption limiting strip, a first disc-shaped spring and a second disc-shaped spring; a steel inhaul cable is connected between the lower connecting plate and the upper connecting plate of the lead core support; a group of support shafts are arranged in the middle of the plate surface of the upper connecting plate at intervals; the supporting shaft is tubular, and micro-expansion high-strength cement mortar is injected into a pipeline of the supporting shaft; the lower sleeve is arranged at the top of the upper connecting plate and sleeved outside the group of support shafts; the height of the lower sleeve is smaller than that of the supporting shaft, and a horizontal supporting plate is arranged at the top of the lower sleeve; a through hole penetrating through the supporting shaft is formed in the plate surface of the horizontal supporting plate, and the upper end of the supporting shaft penetrates through the through hole; the first disc-shaped spring is sleeved on the part of the support shaft, which is positioned between the horizontal support plate and the upper connecting plate, and is in a compressed state; the upper sleeve is arranged at the top of the horizontal support plate and sleeved outside the group of support shafts; the top of the upper sleeve is higher than that of the support shaft; the second disc spring is sleeved on the part of the support shaft in the upper sleeve, and the second disc spring is in a compressed state; a fixing nut is arranged on the supporting shaft and positioned at the top of the second disc spring; the top of the upper sleeve is covered with a top plate; the energy consumption limiting strips are arranged in a group and are arranged between the horizontal supporting plate and the upper connecting plate at intervals along the circumferential direction.

Preferably, the steel cables are arranged in a group and are arranged between the lower connecting plate and the upper connecting plate at intervals along the circumferential direction.

Preferably, the bottom of the upper connecting plate and the connecting position corresponding to the upper end of the steel cable are provided with upper steel wire rope sleeve blocks; a horizontal pore passage is formed in the upper steel wire rope sleeve block; a lower steel wire rope sleeve block is arranged at the top of the lower connecting plate and at a connecting position corresponding to the lower end of the steel cable; a horizontal pore passage is formed in the lower steel wire rope sleeve block; the upper end of the steel cable is arranged in a horizontal hole of the upper steel wire rope sleeve block in a penetrating mode and connected with the upper steel wire rope sleeve block, and the lower end of the steel cable is arranged in a horizontal hole of the lower steel wire rope sleeve block in a penetrating mode and connected with the lower steel wire rope sleeve block.

Preferably, the energy consumption limiting strip is horizontally arranged in a U shape, and a notch of the energy consumption limiting strip faces one side of the vertical shaft of the lower sleeve; the upper end of the energy consumption limiting strip is lapped at the top of the horizontal supporting plate and is connected with the horizontal supporting plate through a bolt; the lower end of the energy consumption limiting strip is in compression joint with the top of the lower connecting plate and is connected with the lower connecting plate through a bolt.

Preferably, upper sleeve stiffening ribs are welded on the outer side wall of the upper sleeve at intervals along the circumferential direction; the top edge of the upper sleeve stiffening rib is connected with the top plate, and the bottom edge of the upper sleeve stiffening rib is connected with the horizontal supporting plate; lower sleeve stiffening ribs are welded on the outer side wall of the lower sleeve at intervals along the circumferential direction; the top edge of the lower sleeve stiffening rib is connected with the horizontal supporting plate, and the bottom edge of the lower sleeve stiffening rib is connected with the bottom of the outer side wall of the lower sleeve.

Preferably, a rubber layer, a stiffening steel plate, a sealing plate and a lead core are arranged between an upper connecting plate and a lower connecting plate of the lead core support; the rubber layers and the stiffening steel plates are provided with a plurality of layers, and the plurality of layers of stiffening steel plates and the plurality of layers of rubber layers are arranged in a staggered manner; the two seal plates are respectively arranged at the top of the uppermost rubber layer and the bottom of the lowermost rubber layer; the lead core is vertically inserted in the centers of the stiffening steel plate and the rubber layer; the upper connecting plate and the lower connecting plate are respectively connected with the corresponding seal plate bolts.

Preferably, a space is left between the outer side wall of the support shaft and the side wall of the corresponding through hole.

Compared with the prior art, the utility model has the following characteristics and beneficial effect.

1. The utility model discloses a three-dimensional shock insulation power consumption support has overcome current support defect, and it can not only play shock insulation shock attenuation effect to the structure in all-round, and the shock attenuation is effectual moreover, resets easily, and stability and fail safe nature are high.

2. The utility model has the advantages that the lead core support at the lower part of the utility model adopts the staggered arrangement of the rubber layers and the steel plate layers, provides enough vertical bearing capacity, simultaneously has great horizontal deformation capacity, has better shock insulation and shock absorption effects on horizontal earthquake action, has better self-resetting capacity and energy consumption capacity, and can provide enough vertical bearing capacity on the upper structure; in addition, a steel inhaul cable with a limiting function is arranged between the upper connecting plate and the lower connecting plate of the lead core support, so that the vertical displacement of the lead core support when the lead core support is pulled is limited, and the lead core support has certain tensile capacity. Meanwhile, the second disc spring arranged in the upper sleeve and the first disc spring arranged in the lower sleeve of the utility model can provide certain vertical buffering, and have better hysteresis performance for vertical earthquake action; the rigidity of the disc spring is high, and enough vertical bearing capacity can be provided for the upper structure. In addition, set up the spacing of the power consumption of U type between the lower junction plate of lead core support and horizontal support plate, on the one hand as the power consumption device when level and vertical direction warp, on the other hand has certain limit function in level and vertical direction to realize the multidimension shock insulation function of isolation bearing when guaranteeing to have enough bearing capacity to superstructure.

3. When an earthquake occurs, the utility model realizes the shock insulation requirement in the horizontal direction through the lead support, and the utility model arranges a steel cable on the lead support for limiting, thereby improving the stability of the lead support; in addition, the three-dimensional shock insulation energy dissipation support of the utility model realizes the vertical shock insulation requirement through the disc spring group and the energy dissipation limiting strip; the support is a steel part except the rubber layer, has good durability and weather resistance and long service life, and has enough bearing capacity to meet the requirements of strength and stability under the action of static load and power.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic view of a three-dimensional structure of a three-dimensional seismic isolation energy-consuming support in the utility model.

Fig. 2 is the front structure schematic diagram of the three-dimensional shock insulation energy dissipation support in the utility model.

Fig. 3 is a schematic view of the vertical section structure of the three-dimensional seismic isolation energy-consuming support of the present invention.

Fig. 4 is a schematic structural view of the lead support of the present invention.

Reference numerals: 1-top plate, 2-upper sleeve, 3-upper sleeve stiffening rib, 4-lower sleeve, 5-lower sleeve stiffening rib, 6-lead core support, 6.1-lower connecting plate, 6.2-upper connecting plate, 6.3-rubber layer, 6.4-stiffening steel plate, 6.5-sealing plate, 6.6-lead core, 7-steel cable, 8-energy consumption limiting strip, 9-first disc spring, 10-supporting shaft, 11-horizontal supporting plate, 12-second disc spring, 13-fixing nut, 14-micro-expansion high-strength cement mortar, 15-perforation, 16-upper steel wire rope sleeve block and 17-lower steel wire rope sleeve block.

Detailed Description

As shown in fig. 1-4, the three-dimensional shock-insulation energy-dissipation support comprises a lead core support 6, a lower sleeve 4, an upper sleeve 2, a steel cable 7, an energy-dissipation limiting strip 8, a first disc-shaped spring 9 and a second disc-shaped spring 12; a steel inhaul cable 7 is connected between the lower connecting plate 6.1 and the upper connecting plate 6.2 of the lead support 6; a group of support shafts 10 are arranged in the middle of the plate surface of the upper connecting plate 6.2 at intervals; the supporting shaft 10 is tubular, and micro-expansion high-strength cement mortar 14 is injected into a pipeline of the supporting shaft 10; the lower sleeve 4 is arranged at the top of the upper connecting plate 6.2 and sleeved outside the group of support shafts 10; the height of the lower sleeve 4 is less than that of the support shaft 10, and a horizontal support plate 11 is arranged at the top of the lower sleeve 4; a through hole 15 penetrating through the support shaft 10 is formed in the plate surface of the horizontal support plate 11, and the upper end of the support shaft 10 penetrates through the through hole 15; the first disc-shaped spring 9 is sleeved on the part, located between the horizontal supporting plate 11 and the upper connecting plate 6.2, of the supporting shaft 10, and the first disc-shaped spring 9 is in a compressed state; the upper sleeve 2 is arranged at the top of the horizontal support plate 11 and sleeved outside the group of support shafts 10; the top of the upper sleeve 2 is higher than that of the support shaft 10; the second disc spring 12 is sleeved on the part of the support shaft 10 in the upper sleeve 2, and the second disc spring 12 is in a compressed state; a fixing nut 13 is arranged on the supporting shaft 10 and positioned at the top of the second disc spring 12; the top of the upper sleeve 2 is covered with a top plate 1; the energy consumption limiting strips 8 are arranged in a group and are arranged between the horizontal supporting plate 11 and the upper connecting plate 6.2 at intervals along the annular direction.

In the embodiment, the first disc-shaped spring 9 and the second disc-shaped spring 12 are conical disc-shaped, and different from the traditional spring, have special functions in function, and are mainly characterized by large load, short stroke, small required space, convenient combination and use, easy maintenance and replacement, high economic safety, and suitability for precision heavy machinery with small space and large load; the optimal application range of the compression stroke is between 10% and 75% of the maximum compression stroke. The disc spring bears great load in a small space, compared with other types of springs, the deformation energy of the disc spring per unit volume is larger, the disc spring has good buffering and shock absorbing capacity, and particularly when the disc spring is combined in an overlapped mode, the effects of absorbing impact and dissipating energy are more remarkable due to the action of surface friction resistance.

In this embodiment, the steel cables 7 are arranged in a group and are arranged between the lower connecting plate 6.1 and the upper connecting plate 6.2 at intervals along the circumferential direction.

In this embodiment, an upper steel wire rope sleeve block 16 is arranged at the bottom of the upper connecting plate 6.2 and at a connecting position corresponding to the upper end of the steel inhaul cable 7; a horizontal pore passage is arranged on the upper steel wire rope sleeve block 16; a lower steel wire rope sleeve block 17 is arranged at the top of the lower connecting plate 6.1 and at the connecting position corresponding to the lower end of the steel cable 7; a horizontal pore passage is formed in the lower steel wire rope sleeve block 17; the upper end of the steel cable 7 is arranged in a horizontal hole of the upper steel wire rope sleeve block 16 in a penetrating mode and connected with the upper steel wire rope sleeve block 16, and the lower end of the steel cable 7 is arranged in a horizontal hole of the lower steel wire rope sleeve block 17 in a penetrating mode and connected with the lower steel wire rope sleeve block 17.

In this embodiment, the energy consumption limiting strip 8 is in a horizontal U shape, and the notch of the energy consumption limiting strip 8 faces one side of the vertical axis of the lower sleeve 4; the upper end of the energy consumption limiting strip 8 is lapped at the top of the horizontal supporting plate 11 and is connected with the horizontal supporting plate 11 through a bolt; the lower end of the energy consumption limiting strip 8 is connected with the top of the lower connecting plate 6.1 in a compression joint mode and is connected with the lower connecting plate 6.1 through bolts.

In the embodiment, upper sleeve stiffening ribs 3 are welded on the outer side wall of the upper sleeve 2 at intervals along the circumferential direction; the top edge of the upper sleeve stiffening rib 3 is connected with the top plate 1, and the bottom edge of the upper sleeve stiffening rib 3 is connected with the horizontal support plate 11; lower sleeve stiffening ribs 5 are welded on the outer side wall of the lower sleeve 4 at intervals along the circumferential direction; the top edge of the lower sleeve stiffening rib 5 is connected with the horizontal supporting plate 11, and the bottom edge of the lower sleeve stiffening rib 5 is connected with the bottom of the outer side wall of the lower sleeve 4.

In this embodiment, a rubber layer 6.3, a stiffening steel plate 6.4, a seal plate 6.5 and a lead 6.6 are arranged between an upper connecting plate 6.2 and a lower connecting plate 6.1 of the lead support 6; the rubber layer 6.3 and the stiffening steel plate 6.4 are both provided with a plurality of layers, and the plurality of layers of stiffening steel plates 6.4 and the plurality of layers of rubber layers 6.3 are arranged in a staggered manner; the two seal plates 6.5 are respectively arranged at the top of the uppermost rubber layer 6.3 and the bottom of the lowermost rubber layer 6.3; the lead core 6.6 is vertically inserted in the center of the stiffening steel plate 6.4 and the rubber layer 6.3; the upper connecting plate 6.2 and the lower connecting plate 6.1 are respectively connected with the corresponding seal plates 6.5 through bolts.

In this embodiment, a space is left between the outer side wall of the support shaft 10 and the side wall of the corresponding through hole 15.

In the embodiment, the length of the part of the support shaft 10 in the upper sleeve 2 is 8cm to 50cm.

In this embodiment, the first disc spring 9 is disposed inside the lower sleeve 4 and sleeved on the support shaft 10, the lower end of the first disc spring 9 is disposed on the upper connecting plate 6.2 of the lead support 6, and the upper end of the first disc spring 9 is not connected to the horizontal support plate 11.

In this embodiment, the number of the support shafts 10 may be five or four, and the support shafts are arranged inside the upper sleeve 2 and the lower sleeve 4; the supporting shaft 10 vertically penetrates through a through hole 15 formed in the horizontal supporting plate 11, the upper end of the supporting shaft is pre-tightened and fixed by a fixing nut 13, and the lower end of the supporting shaft is connected with an upper connecting plate 6.2 of the lead support 6; the upper part of the supporting shaft 10 is provided with a second disc spring 12 tightly propped between the fixing nut 13 and the horizontal supporting plate 11, and the lower part is provided with a first disc spring 9 tightly propped between the horizontal supporting plate 11 and the upper connecting plate 6.2 of the lead support 6.

In this embodiment, the energy consumption limiting strips 8 are made of steel plate strips, the number of the energy consumption limiting strips 8 is sixteen or twelve, the energy consumption limiting strips are evenly arranged around the lower connecting plate 6.1 of the horizontal supporting plate 11 and the lead core support 6, one end of each energy consumption limiting strip is arranged on the horizontal supporting plate 11 and fixedly connected with the horizontal supporting plate through a bolt, and the other end of each energy consumption limiting strip is arranged on the lower connecting plate 6.1 of the lead core support 6 and fixedly connected with the lower connecting plate through a bolt.

In this embodiment, the supporting shaft 10 vertically passes through the through hole formed in the horizontal supporting plate 11, and is not connected to the through hole.

The working principle of the embodiment is as follows: during the earthquake, the lead support 6 of lower part can have great displacement in the horizontal direction, has better shock insulation and shock absorption to horizontal earthquake effect, has better from reset ability and power consumption ability, and can provide sufficient vertical bearing capacity to superstructure, sets up the steel cable in addition between the upper and lower connecting plate of lead support 6 for vertical displacement when restriction lead support 6 is drawn makes lead support 6 have certain tensile ability. Meanwhile, the second disc spring 12 in the upper sleeve 2 and the first disc spring 9 in the lower sleeve can provide certain vertical buffering, the vertical earthquake action has good hysteretic performance, and the disc springs are high in rigidity and can provide enough vertical bearing capacity for an upper structure. Meanwhile, an energy consumption limiting strip 8 is arranged between a lower connecting plate 6.1 of the lead support 6 and the horizontal supporting plate 11, on one hand, the energy consumption limiting strip serves as an energy consumption device when the lower connecting plate deforms in the horizontal and vertical directions, on the other hand, the lower connecting plate has a certain limiting function in the horizontal and vertical directions, and therefore the multi-dimensional shock insulation function of the shock insulation support is achieved while enough bearing capacity is guaranteed for an upper structure.

The above embodiments are not exhaustive of the specific embodiments, and other embodiments are possible, and the above embodiments are intended to illustrate, but not limit the scope of the present invention, and all applications coming from the simple changes of the present invention fall within the scope of the present invention.

Claims

1. A three-dimensional shock insulation energy dissipation support is characterized in that: the energy-consumption energy-saving device comprises a lead core support (6), a lower sleeve (4), an upper sleeve (2), a steel inhaul cable (7), an energy-consumption limiting strip (8), a first disc-shaped spring (9) and a second disc-shaped spring (12); a steel inhaul cable (7) is connected between the lower connecting plate (6.1) and the upper connecting plate (6.2) of the lead core support (6); a group of support shafts (10) are arranged in the middle of the plate surface of the upper connecting plate (6.2) at intervals; the supporting shaft (10) is tubular, and micro-expansion high-strength cement mortar (14) is injected into a pipeline of the supporting shaft (10); the lower sleeve (4) is arranged at the top of the upper connecting plate (6.2) and sleeved on the outer side of the group of support shafts (10); the height of the lower sleeve (4) is smaller than that of the support shaft (10), and a horizontal support plate (11) is arranged at the top of the lower sleeve (4); a through hole (15) penetrating through the support shaft (10) is formed in the plate surface of the horizontal support plate (11), and the upper end of the support shaft (10) penetrates through the through hole (15); the first disc-shaped spring (9) is sleeved on the part, located between the horizontal supporting plate (11) and the upper connecting plate (6.2), of the supporting shaft (10), and the first disc-shaped spring (9) is in a compressed state; the upper sleeve (2) is arranged at the top of the horizontal support plate (11) and sleeved outside the group of support shafts (10); the top of the upper sleeve (2) is higher than that of the support shaft (10); the second disc spring (12) is sleeved on the part, located in the upper sleeve (2), of the support shaft (10), and the second disc spring (12) is in a compressed state; a fixing nut (13) is arranged on the supporting shaft (10) and positioned at the top of the second disc spring (12); the top of the upper sleeve (2) is covered with a top plate (1); the energy consumption limiting strips (8) are arranged in a group and are arranged between the horizontal supporting plate (11) and the upper connecting plate (6.2) at intervals along the circumferential direction.

2. The three-dimensional seismic isolation and energy dissipation support according to claim 1, wherein: the steel inhaul cables (7) are arranged in a group and are arranged between the lower connecting plate (6.1) and the upper connecting plate (6.2) at intervals along the circumferential direction.

3. The three-dimensional seismic isolation and energy dissipation support according to claim 1, wherein: an upper steel wire rope sleeve block (16) is arranged at the bottom of the upper connecting plate (6.2) and at a connecting position corresponding to the upper end of the steel inhaul cable (7); a horizontal pore passage is arranged on the upper steel wire rope sleeve block (16); a lower steel wire rope sleeve block (17) is arranged at the top of the lower connecting plate (6.1) and at the connecting position corresponding to the lower end of the steel cable (7); a horizontal pore channel is formed in the lower steel wire rope sleeve block (17); the upper end of the steel cable (7) is arranged in a horizontal hole of the upper steel wire rope sleeve block (16) in a penetrating mode and connected with the upper steel wire rope sleeve block (16), and the lower end of the steel cable (7) is arranged in a horizontal hole of the lower steel wire rope sleeve block (17) in a penetrating mode and connected with the lower steel wire rope sleeve block (17).

4. The three-dimensional seismic isolation and energy dissipation support according to claim 1, wherein: the energy consumption limiting strip (8) is horizontally arranged in a U shape, and the notch of the energy consumption limiting strip (8) faces to one side of the vertical shaft of the lower sleeve (4); the upper end of the energy consumption limiting strip (8) is lapped on the top of the horizontal supporting plate (11) and is connected with the horizontal supporting plate (11) through a bolt; the lower end of the energy consumption limiting strip (8) is connected with the top of the lower connecting plate (6.1) in a compression mode and is connected with the lower connecting plate (6.1) through bolts.

5. The three-dimensional seismic isolation and energy dissipation support according to claim 1, wherein: upper sleeve stiffening ribs (3) are welded on the outer side wall of the upper sleeve (2) at intervals along the circumferential direction; the top edge of the upper sleeve stiffening rib (3) is connected with the top plate (1), and the bottom edge of the upper sleeve stiffening rib (3) is connected with the horizontal support plate (11); lower sleeve stiffening ribs (5) are welded on the outer side wall of the lower sleeve (4) at intervals along the circumferential direction; the top edge of the lower sleeve stiffening rib (5) is connected with the horizontal support plate (11), and the bottom edge of the lower sleeve stiffening rib (5) is connected with the bottom of the outer side wall of the lower sleeve (4).

6. The three-dimensional seismic isolation and energy dissipation support according to claim 1, wherein: a rubber layer (6.3), a stiffening steel plate (6.4), a sealing plate (6.5) and a lead core (6.6) are arranged between an upper connecting plate (6.2) and a lower connecting plate (6.1) of the lead core support (6); the rubber layer (6.3) and the stiffening steel plate (6.4) are both provided with a plurality of layers, and the plurality of layers of stiffening steel plates (6.4) and the plurality of layers of rubber layers (6.3) are arranged in a staggered manner; the two sealing plates (6.5) are respectively arranged at the top of the rubber layer (6.3) at the uppermost part and at the bottom of the rubber layer (6.3) at the lowermost part; the lead core (6.6) is vertically inserted into the centers of the stiffening steel plate (6.4) and the rubber layer (6.3); the upper connecting plate (6.2) and the lower connecting plate (6.1) are respectively connected with the corresponding seal plates (6.5) through bolts.

7. The three-dimensional seismic isolation and energy dissipation support according to claim 1, wherein: and a space is reserved between the outer side wall of the support shaft (10) and the side wall of the corresponding through hole (15).