CN218667951U - End plate-free prefabricated structure - Google Patents

Abstract

The application provides an end plate-free prefabricated structure, which comprises a first prefabricated part, a second prefabricated part, a first sleeve and a second sleeve with one open ends, two embedded ribs and a connecting structure, wherein the first sleeve and the second sleeve are respectively arranged in the first prefabricated part and the second prefabricated part in a penetrating mode; the connecting sleeve is arranged between the first part and the first sleeve; the resilient member is sleeved over the second portion and is configured to operably squeeze into the second sleeve and be interference disposed between the second portion and the second sleeve. Above-mentioned no end plate connection structure sets up the adapter sleeve and makes connection structure be used for the adjustable with the external diameter size of the part that first sleeve links to each other, sets up the elastic component and makes connection structure be used for the adjustable with the external diameter size of the part that the second sleeve links to each other to connection structure has improved first sleeve and the telescopic suitability of second of different internal diameters.

Description

End plate-free prefabricated structure

Technical Field

The application relates to the technical field of building connection structures, in particular to an end plate-free prefabricated structure.

Background

In order to connect the two prefabricated members, a connecting structure is usually adopted to connect the two prefabricated members with the end portions of the two prefabricated members respectively, and metal end plates are arranged at the end portions of the two prefabricated members respectively, so that the connecting strength of the joint between the two prefabricated members is improved, but the end plates are arranged, and the manufacturing cost is increased. To this end, the related art provides an endless plate preform, in which a sleeve coupled to a coupling structure is provided at an end of the preform, and reinforcing bars coupled to the sleeve are provided in the preform, so that the sleeve and the preform are more securely coupled.

However, the endless-plate preform in the related art has a problem that the applicability of the sleeve and the joining structure is low.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide an endless plate preform structure that improves the applicability of the sleeve and the joint structure to the problem of the low applicability of the sleeve and the joint structure of the endless plate preform in the related art.

According to one aspect of the present application, there is provided an endless-plate preform structure comprising:

the first prefabricated part and the second prefabricated part are sequentially arranged along a first direction;

the first sleeve and the second sleeve are provided with openings at one ends, and penetrate through the ends, close to each other, of the first prefabricated member and the second prefabricated member along the first direction respectively, and the openings of the first sleeve and the openings of the second sleeve are arranged opposite to each other;

the two embedded ribs are respectively arranged in the first prefabricated member and the second prefabricated member and are respectively connected to one end, far away from each other, of the first sleeve and one end, far away from each other, of the second sleeve; and

the connecting structure comprises a connecting rod, a connecting sleeve and an elastic piece, wherein the connecting rod comprises a first part and a second part which are sequentially connected along the first direction; the connecting sleeve is arranged between the first part and the first sleeve; a resilient member is sleeved over the second portion, the resilient member being configured to operably intrude into the second sleeve and be interference disposed between the second portion and the second sleeve.

The connection structure without the end plate enables the connecting rod to be tightly connected with the second sleeve through the elastic piece which is sleeved on the second part of the connecting rod. The connecting sleeve sleeved on the first part of the connecting rod is arranged to be connected with the first sleeve. And can be through the external diameter size that changes the elastic component in order to be applicable to the different second sleeve of internal diameter size to can be through the external diameter size that changes the adapter sleeve in order to be applicable to the different first sleeve of internal diameter size, promptly, make the external diameter size that connection structure is used for the part that links to each other with first sleeve and be used for the external diameter size that links to each other with the second sleeve adjustable, thereby improved connection structure to the first sleeve and the second sleeve's of different internal diameters suitability.

In one embodiment, one end of the elastic member close to the first portion abuts against the connecting sleeve along the first direction.

In one embodiment, each of the embedded ribs extends lengthwise along the first direction.

In one embodiment, a first mounting hole penetrating through the first sleeve along the first direction is formed in one end, away from the second sleeve, of the first sleeve, and a second mounting hole penetrating through the second sleeve along the first direction is formed in one end, away from the first sleeve, of the second sleeve;

two pre-buried muscle is worn to locate respectively first mounting hole with in the second mounting hole, and each the one end of pre-buried muscle all is equipped with butt portion, one of them pre-buried muscle butt portion stretch into in the first sleeve, and follow first direction butt in first sleeve sets up first mounting hole department, another pre-buried muscle butt portion stretch into in the second sleeve, and follow first direction butt in the second sleeve sets up second mounting hole department.

In one embodiment, the inner diameters of the first sleeve and the second sleeve are equal in size.

In one embodiment, the connecting sleeve is threadedly connected to the first sleeve and the first portion, respectively.

In one embodiment, the outer wall of the elastic part is provided with a plurality of outer threads spirally extending from one side to the other side along the first direction;

the inner wall of the second sleeve is provided with a plurality of inner threads spirally extending from one side to the other side along the first direction, and the inner threads and the outer threads are meshed with each other to limit the movement of the elastic piece along the first direction and the radial direction of the second sleeve.

In one embodiment, the connecting rod further comprises a head;

the head is connected to one end, far away from the first portion, of the second portion, the radial size of the head is larger than that of the second portion, and the head can abut against one end, far away from the first portion, of the elastic piece along the first direction.

In one embodiment, the elastic member has a first abutting surface for abutting against the head;

the head part is provided with a second abutting surface for abutting against the elastic part;

the first abutment surface and the second abutment surface are each arranged obliquely with respect to a radial cross section of the connecting rod.

In one embodiment, one end of the elastic piece close to the first part along the first direction is provided with a first end surface, and the first end surface is sunken into the elastic piece along the first direction to form a first blind hole;

one end of the elastic piece, which is far away from the first part along the first direction, is provided with a second end face, and the second end face is sunken into the elastic piece along the first direction to form a second blind hole;

the first blind hole and the second blind hole penetrate through the elastic piece along the radial direction of the second sleeve.

Drawings

FIG. 1 is a cross-sectional view of an endless board preform structure according to an embodiment of the present application;

FIG. 2 is a schematic structural view of the connecting rod in the embodiment shown in FIG. 1;

FIG. 3 is a cross-sectional view of the connection sleeve in the embodiment shown in FIG. 1;

FIG. 4 is a top view of the connection sleeve in the embodiment shown in FIG. 1;

FIG. 5 is a schematic structural view of the elastic member in the embodiment shown in FIG. 1;

fig. 6 is a top view of the resilient member of the embodiment of fig. 1.

Description of reference numerals:

100. an end plate-free prefabricated structure; 10. a first preform; 20. a second preform; 30. a first sleeve; 31. a first mounting hole; 32. a first screw thread; 40. a second sleeve; 41. a second mounting hole; 42. internal threads; 50. pre-burying ribs; 51. an abutting portion; 60. a connecting rod; 61. a first portion; 62. a second portion; 63. a head portion; 631. a first abutting surface; 70. connecting sleeves; 71. a second screw thread; 80. an elastic member; 81. a second abutting surface; 82. a first end face; 83. a first blind hole; 84. a second end face; 85. a second blind hole; 86. external thread; 110. a connecting structure; A. a first direction.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

FIG. 1 is a cross-sectional view of an endplate-free preform structure in an embodiment of the present application.

Referring to fig. 1, an endless plate preform structure 100 provided in an embodiment of the present application includes a first preform 10, a second preform 20, a first sleeve 30, a second sleeve 40, two embedded ribs 50, and a connecting structure 110.

The first prefabricated member 10 and the second prefabricated member 20 are sequentially arranged along a first direction A, the first sleeve 30 and the second sleeve 40 are respectively arranged at one end, close to each other, of the first prefabricated member 10 and the second prefabricated member 20 along the first direction A in a penetrating mode, the first sleeve 30 and the second sleeve 40 are provided with openings at the same end, and the opening of the first sleeve 30 and the opening of the second sleeve 40 are arranged opposite to each other. Two embedded ribs 50 are respectively arranged in the first prefabricated member 10 and the second prefabricated member 20 and are respectively connected to the ends of the first sleeve 30 and the second sleeve 40 which are far away from each other. The connecting structure 110 includes a connecting rod 60, a connecting sleeve 70 and an elastic member 80, wherein the connecting rod 60 includes a first portion 61 and a second portion 62 connected in sequence along a first direction a, the connecting sleeve 70 is disposed between the first portion 61 and the first sleeve 30, the elastic member 80 is disposed on the second portion 62, and the elastic member 80 is configured to be operatively extruded into the second sleeve 40 and is disposed between the second portion 62 and the second sleeve 40 in an interference manner.

The above-mentioned endless plate preform structure 100 is provided with two embedded ribs 50 to improve the connection reliability between the first sleeve 30 and the first preform 10 and the connection reliability between the second sleeve 40 and the second preform 20. The joining structure 110 is provided so that the first preform 10 and the second preform 20 are joined to each other by the joining structure 110. And the elastic member 80 is sleeved on the second portion 62 of the connecting rod 60, so that the elastic member 80 is contracted and extruded into the second preform 20 along the radial direction of the second sleeve 40 under the action of an external force, and after the elastic member 80 is extruded into the second preform 20, the elastic member 80 is arranged between the second portion 62 and the second sleeve 40 in an interference manner through the elastic force generated by the elastic member 80 recovering to the original shape, so that the connecting structure 110 is reliably connected with the second preform 20. By providing the connection sleeve 70 on the first portion 61, the elastic member 80 is prevented from coming out of the connection rod 60 in a direction in which the second portion 62 is directed toward the first portion 61. In addition, the arrangement of the elastic member 80 changes the outer diameter of the connection structure 110 for connecting with the second sleeve 40, and the arrangement of the connection sleeve 70 changes the outer diameter of the connection structure 110 for connecting with the first sleeve 30, so that the outer diameter of the elastic member 80 can be set according to the inner diameter of the second sleeve 40, and the outer diameter of the connection sleeve 70 can be set according to the inner diameter of the first sleeve 30, thereby improving the applicability of the connection structure 110 to the first sleeve 30 and the second sleeve 40 with different inner diameters.

In some embodiments, as shown in fig. 1, each embedded rib 50 extends lengthwise along the first direction a. It should be noted that, when the endless board preform structure 100 is subjected to an external force, the first sleeve 30 and the second sleeve 40 have a tendency to be detached from the first preform 10 or the second preform 20 in the first direction a, respectively. Therefore, by providing the embedded ribs 50 to extend lengthwise along the first direction a, the embedded ribs 50 can bear the pulling force along the first direction a generated in the first preform 10 or the second preform 20 when an external force acts on the embedded ribs, so that the first sleeve 30 and the first preform 10, and the second sleeve 40 and the second preform 20 are connected more firmly.

In some embodiments, as shown in fig. 1, an end of the first sleeve 30 away from the second sleeve 40 is provided with a first mounting hole 31 penetrating the first sleeve 30 along the first direction a, and an end of the second sleeve 40 away from the first sleeve 30 is provided with a second mounting hole 41 penetrating the second sleeve 40 along the first direction a. Two pre-buried muscle 50 wear to locate in first mounting hole 31 and second mounting hole 41 respectively, and the one end of each pre-buried muscle 50 all is equipped with butt portion 51, and wherein the butt portion 51 of a pre-buried muscle 50 stretches into in the first sleeve 30 to set up first mounting hole 31 department along first direction A butt in first sleeve 30, the butt portion 51 of another pre-buried muscle 50 stretches into in the second sleeve 40, and sets up second mounting hole 41 department along first direction A butt in second sleeve 40. In this way, by providing the abutting portions 51 on the embedded ribs 50, the two embedded ribs 50 abut against the first sleeve 30 and the second sleeve 40, respectively, so as to prevent the embedded ribs 50 from being released from the first sleeve 30 or the second sleeve 40, and to make the abutting force provided by the embedded ribs 50 to the first sleeve 30 opposite to the direction of the tendency of the first sleeve 30 to be released from the first preform 10, and the abutting force provided by the embedded ribs 50 to the second sleeve 40 opposite to the direction of the tendency of the second sleeve 40 to be released from the second preform 20, further preventing the first sleeve 30 from being released from the first preform 10, or the second sleeve 40 from being released from the second preform 20.

In the actual assembly process, the first sleeve 30 and one of the embedded bars 50 may be connected first, and then concrete is poured to embed the first sleeve 30 and one of the embedded bars 50 and form the first prefabricated member 10. And after the second sleeve 40 is connected with the other embedded rib 50, pouring concrete to pre-embed the second sleeve 40 and the other embedded rib 50 and form a second prefabricated member 20.

To further enhance the applicability of the connection structure 110, in some embodiments, as shown in FIG. 1, the inner diameters of the first sleeve 30 and the second sleeve 40 are equal in size. In this way, the outer diameter of the connecting sleeve 70 is equal to the outer diameter of the elastic member 80, so that both opposite ends of the connecting structure 110 along the first direction a can be applied to the first sleeve 30 and the second sleeve 40, that is, either end of the connecting structure can be inserted into the first sleeve 30 or the second sleeve 40, thereby further improving the versatility of the connecting structure 110.

FIG. 2 is a schematic view of the structure of the connecting rod in the embodiment of FIG. 1; FIG. 3 is a cross-sectional view of the connection sleeve in the embodiment shown in FIG. 1; fig. 4 is a top view of the connection sleeve in the embodiment shown in fig. 1.

In some embodiments, as shown in connection with fig. 1-4, the connection sleeve 70 is threadably connected to the first sleeve 30 and the first portion 61, respectively. In this way, the connecting sleeve 70 is detachably and reliably connected with the first sleeve 30 and the first part 61 respectively.

In the actual assembly process, the connecting rod 60 is first inserted into the elastic member 80, so that the elastic member 80 is sleeved on the second portion 62 of the connecting rod 60, and then the connecting sleeve 70 is screwed on the first portion 61 of the connecting rod 60 to limit the elastic member 80. Then, the end of the connecting structure 110 provided with the connecting sleeve 70 is screwed into the first prefabricated member 10, and the end of the connecting sleeve 70 far away from the first prefabricated member 10 is extruded into the second prefabricated member 20 along the first direction a, so that the assembly of the connecting structure 110 with the first prefabricated member 10 and the second prefabricated member 20 is completed.

In some embodiments, as shown in fig. 1, one end of the elastic member 80 near the first portion 61 abuts against the connecting sleeve 70 along the first direction a to avoid the elastic member 80 from shaking relative to the connecting sleeve 70 in the first direction a, thereby avoiding the first preform 10 and the second preform 20 from shaking in the first direction a.

FIG. 5 is a schematic structural view of the elastic member in the embodiment shown in FIG. 1; fig. 6 is a top view of the resilient member of the embodiment of fig. 1.

In order to enable the elastic member 80 to elastically deform along the radial direction of the second sleeve 40, in some embodiments, as shown in fig. 1 and fig. 5 to 6, an end of the elastic member 80 close to the first portion 61 along the first direction a has a first end surface 82, and the first end surface 82 is recessed into the elastic member 80 along the first direction a to form a first blind hole 83. One end of the elastic member 80 away from the first portion 61 along the first direction a has a second end surface 84, and the second end surface 84 is recessed into the elastic member 80 along the first direction a to form a second blind hole 85. The first and second blind holes 83 and 85 each penetrate the elastic member 80 in the radial direction of the second sleeve 40. In this manner, the elastic members 80 can be made to approach each other on both sides of the first blind hole 83 in the circumferential direction of the second sleeve 40, and the elastic members 80 can be made to approach each other on both sides of the second blind hole 85 in the circumferential direction of the second sleeve 40, so that the elastic members 80 can be contracted in the circumferential direction of the second sleeve 40. And because the first blind hole 83 and the second blind hole 85 both penetrate the elastic member 80 along the radial direction of the second sleeve 40, when the elastic member 80 contracts along the circumferential direction of the second sleeve 40, the inner diameter size and the outer diameter size of the elastic member 80 are both reduced, even if the elastic member 80 contracts along the radial direction of the second sleeve 40, the elastic member 80 can be squeezed into the second sleeve 40 under the action of external force, and is arranged between the second sleeve 40 and the second portion 62 in an interference manner after being squeezed into the second sleeve 40.

Specifically, as shown in fig. 5, the sum of the size of the first blind hole 83 in the first direction a and the size of the second blind hole 85 in the first direction a is greater than or equal to the size of the elastic member 80 in the first direction a, so that the elastic member 80 can be elastically deformed in the radial direction of the second sleeve 40 from one side to the other side of the elastic member 80 in the first direction a.

Optionally, as shown in fig. 5 to 6, the number of the first blind holes 83 and the number of the second blind holes 85 are multiple, the first blind holes 83 are arranged in a circular array, and the second blind holes 85 are arranged in a circular array, so that the elastic member 80 can contract more uniformly along the circumferential direction of the second sleeve 40, so as to squeeze the elastic member 80 into the second sleeve 40.

In order to tightly connect the elastic member 80 to the second sleeve 40, in some embodiments, as shown in fig. 1 and 5, the outer wall of the elastic member 80 is provided with a plurality of outer threads 86 spirally extending from side to side along the first direction a. The inner wall of the second sleeve 40 is provided with a plurality of inner threads 42 spirally extending from side to side in the first direction a, and the inner threads 42 and the outer threads 86 are engaged with each other to restrict the movement of the elastic member 80 in the first direction a and the radial direction of the second sleeve 40. In this manner, the elastic member 80 is prevented from being removed from the second sleeve 40 by providing the inner and outer threads 42 and 86 to be engaged with each other, thereby firmly connecting the first preform 10 with the second preform 20. And the second sleeve 40 and the elastic member 80 are both easy to process because the inner screw thread 42 and the outer screw thread 86 are both easy to process.

Optionally, the inner wall of the first sleeve 30 is provided with a first screw thread 32 spirally extending from side to side along the first direction a, and the shape and size of the first screw thread 32 are the same as those of the inner screw thread 42. The outer wall of the connecting sleeve 70 is provided with a second screw tooth 71 which extends spirally from one side to the other side along the first direction A, and the tooth shape and the size of the second screw tooth 71 are the same as those of the outer screw tooth 86. As such, both opposite ends of the connection structure 110 are enabled to be connected to either of the first sleeve 30 and the second sleeve 40, thereby further improving the versatility of the connection structure 110.

In order to prevent the elastic sleeve from being pulled out from the end of the connecting rod 60 away from the first portion 61 along the first direction a, in some embodiments, as shown in fig. 1-2, the connecting rod 60 further includes a head 63, the head 63 is connected to the end of the second portion 62 away from the first portion 61, and the radial dimension of the head 63 is greater than that of the second portion 62, and the head 63 can abut against the end of the elastic member 80 away from the first portion 61 along the first direction a. In this way, the elastic member 80 is prevented from being released from the connecting rod 60 along the direction in which the first portion 61 points to the second portion 62, and the elastic member 80 is restrained between the connecting sleeve 70 and the head 63 along the first direction a, further preventing the elastic member 80 from shaking along the first direction a.

In some embodiments, as shown in fig. 1-2 and 5, the elastic element 80 has a first abutment surface 631 for abutting against the head 63, the head 63 has a second abutment surface 81 for abutting against the elastic element 80, and both the first abutment surface 631 and the second abutment surface 81 are arranged obliquely with respect to the radial section of the connecting rod 60. When the connection structure 110 receives the pulling force along the first direction a and away from the second structural member, the head 63 abuts against the first abutting surface 631 of the elastic member 80 through the second abutting surface 81, so that the head 63 applies a radial pressure to the elastic member 80 along the second sleeve 40, and the radial pressure of the elastic member 80 to the second sleeve 40 Shi Jiayan and the second sleeve 40 is further increased, thereby further improving the pulling resistance of the connection structure 110. For example, when the elastic member 80 is provided with the external threads 86 and the second sleeve 40 is provided with the internal threads 42, the head 63 presses the elastic member 80 in the radial direction of the second sleeve 40, so that the external threads 86 apply a force to the internal threads 42 in the radial direction of the second sleeve 40, thereby further preventing the elastic member 80 from being removed from the second sleeve 40.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An endless-plate preform construction comprising:

the first prefabricated part and the second prefabricated part are sequentially arranged along a first direction;

the first sleeve and the second sleeve are provided with openings at one ends, and penetrate through one ends, close to each other, of the first prefabricated member and the second prefabricated member along the first direction respectively, and the openings of the first sleeve and the openings of the second sleeve are arranged oppositely;

the two embedded ribs are respectively arranged in the first prefabricated part and the second prefabricated part and are respectively connected to one ends, far away from each other, of the first sleeve and the second sleeve; and

the connecting structure comprises a connecting rod, a connecting sleeve and an elastic piece, wherein the connecting rod comprises a first part and a second part which are sequentially connected along the first direction; the connecting sleeve is arranged between the first part and the first sleeve; an elastomeric member is sleeved over the second portion, the elastomeric member being configured to be operably extruded into the second sleeve and interference fit between the second portion and the second sleeve.

2. The endless plate preform structure of claim 1, wherein an end of the elastic member near the first portion abuts against the connection sleeve in the first direction.

3. The endless plate preform structure of claim 1, wherein each of said embedded ribs extends lengthwise in said first direction.

4. The endless plate preform structure of claim 1, wherein an end of the first sleeve remote from the second sleeve is provided with a first mounting hole penetrating the first sleeve in the first direction, and an end of the second sleeve remote from the first sleeve is provided with a second mounting hole penetrating the second sleeve in the first direction;

two pre-buried muscle is worn to locate respectively first mounting hole with in the second mounting hole, and each the one end of pre-buried muscle all is equipped with butt portion, one of them pre-buried muscle butt portion stretch into in the first sleeve, and follow first direction butt in first sleeve sets up first mounting hole department, another pre-buried muscle butt portion stretch into in the second sleeve, and follow first direction butt in the second sleeve sets up second mounting hole department.

5. The endless plate preform structure of claim 1, wherein the first and second sleeves have inner diameters of equal size.

6. The endless plate preform structure of claim 1, wherein the connection sleeves are threaded with the first sleeve and the first portion, respectively.

7. The endless plate preform structure of claim 1, wherein the outer wall of the elastic member is provided with a plurality of outer teeth spirally extending from side to side in the first direction;

the inner wall of the second sleeve is provided with a plurality of inner threads spirally extending from one side to the other side along the first direction, and the inner threads and the outer threads are meshed with each other to limit the movement of the elastic piece along the first direction and the radial direction of the second sleeve.

8. The endless-plate preform structure of claim 1, wherein the connecting rod further comprises a head portion;

the head is connected to one end, far away from the first portion, of the second portion, the radial size of the head is larger than that of the second portion, and the head can abut against one end, far away from the first portion, of the elastic piece along the first direction.

9. The endless plate preform structure of claim 8, wherein the elastic member has a first abutment surface for abutment with the head portion;

the head part is provided with a second abutting surface for abutting against the elastic part;

the first abutment surface and the second abutment surface are both arranged obliquely with respect to a radial cross section of the connecting rod.

10. The endless plate preform structure of claim 1, wherein an end of the elastic member adjacent to the first portion in the first direction has a first end surface, and the first end surface is recessed into the elastic member in the first direction to form a first blind hole;

one end, far away from the first part, of the elastic piece along the first direction is provided with a second end face, and the second end face is sunken into the elastic piece along the first direction to form a second blind hole;

the first blind hole and the second blind hole penetrate through the elastic piece along the radial direction of the second sleeve.

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