Expansion stud

Abstract

The expansion stud comprises a stud body and an expansion sleeve arranged outside the stud body in a sleeving mode, the expansion sleeve comprises two clamped installation structures, each installation structure comprises an expansion head and a barrel body, the expansion sleeve is connected with the barrel body, a limiting groove is formed in the inner wall of the barrel body, and an elastic piece is arranged in the limiting groove; the stud comprises a stud body, an expansion head and a meson, and the expansion head is arranged at the end of the stud body and located in the expansion head. The meson is arranged on the stud body and located in the containing groove, and when the stud moves towards the expansion head, the meson abuts against the elastic piece. The limiting groove is formed in the cylinder body, the elastic piece is arranged in the limiting groove, the limiting groove is matched with the meson on the toggle pin, the meson can be limited in the limiting groove, when the toggle pin is pushed inwards, the meson abuts against the elastic piece and enables the elastic piece to deform, after a related worker loosens the hand, the toggle pin can be driven to move outwards through resetting of the elastic piece, and therefore the toggle pin can move outwards. And the expansion sleeve is expanded by the expansion head, the structure is more stable, and the operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of connection, in particular to an expansion bolt. Background Art

[0002] Expansion bolts are special bolts used to fix objects. They can expand after being inserted into a hole to provide better holding force. They are used in many fields.

[0003] In the related art, for example, when splicing or connecting wooden boards, the expansion bolt structure usually used includes a bolt and an expansion sleeve. When used, the bolt is inserted into the expansion sleeve, and the expansion sleeve is installed in the corresponding mounting hole by pushing the bolt, and the bolt is pulled to make the expansion sleeve expand outward to achieve the installation of the wooden board.

[0004] However, during actual use, the above-mentioned expansion bolts are prone to move inside the expansion sleeve due to the lack of limit stops, making the structure unstable. In addition, when installing the expansion sleeve in the corresponding mounting hole, the bolts still need to be manually pulled outward to achieve expansion of the expansion sleeve. Summary of the invention

[0005] The utility model aims to solve one of the technical problems in the above-mentioned technology at least to a certain extent.

[0006] To achieve the above-mentioned purpose, the first aspect of the utility model proposes an expansion bolt, comprising: a bolt and an expansion sleeve sleeved outside the bolt, wherein the expansion sleeve comprises two mutually engaging mounting structures, each of the mounting structures comprises an expansion sleeve and a cylinder body, wherein the expansion sleeve and the cylinder body are connected and integrally formed; a limiting groove is provided on the inner wall of the cylinder body, and an elastic sheet is provided in the limiting groove; the bolt comprises a bolt body, an expansion head and a meson, wherein the expansion head is provided at the end of the bolt body and is located in the expansion sleeve; the meson is provided on the bolt body and is located in the limiting groove, and when the bolt moves toward the expansion sleeve, the meson abuts against the elastic sheet.

[0007] In addition, the expansion bolt proposed in the utility model may also have the following additional technical features:

[0008] As a further description of the above technical solution: the expansion sleeve is provided with a first placement groove inwardly along the direction of the cylinder, and a second placement groove is provided on the cylinder, and the first placement groove is communicated with the second placement groove, wherein when the bolt is arranged between the two engaged mounting structures, the expansion head is located between the two first placement grooves, and the bolt body is located between the two second placement grooves.

[0009] As a further description of the above technical solution: the cross-sections of the expansion sleeve and the cylinder are both semicircular structures, and the cross-section size of the expansion sleeve is larger than the cross-section size of the cylinder.

[0010] As a further description of the above technical solution: the expansion sleeve is provided with an expansion groove for expansion and deformation.

[0011] As a further description of the above technical solution: an anti-slip groove is provided on the outer wall of the expansion sleeve.

[0012] As a further description of the above technical solution: buckles and slots are respectively provided on both sides of the cylinder, and the buckle of one mounting structure is snap-connected with the slot of the other mounting structure.

[0013] As a further description of the above technical solution: the outer diameter of the expansion head gradually decreases from one end away from the bolt body to the other end.

[0014] As a further description of the above technical solution: the bolt also includes a mounting head, which is arranged at an end of the bolt body away from the expansion head, and the mounting head is a round head, a T-shaped head or a hexagonal head.

[0015] As a further description of the above technical solution: when the two installation structures are engaged, the two cylindrical outer sleeves are provided with protective sleeves.

[0016] According to the expansion bolt of the utility model, a limit groove is opened on the cylinder body, and an elastic sheet is provided in the limit groove. In cooperation with the meson on the bolt, the meson can be limited in the limit groove. When the bolt is pushed inward, the meson abuts against the elastic sheet and deforms it. After the relevant staff lets go, the elastic sheet can be reset to drive the bolt to move outward, so that the expansion head can expand the expansion sleeve. The structure is more stable and the operation is more convenient.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 It is a structural schematic diagram of an expansion bolt according to an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the explosion structure of an expansion bolt according to an embodiment of the utility model;

[0021] Figure 3is a schematic diagram of an installation structure according to an embodiment of the utility model;

[0022] Figure 4 is a schematic structural diagram of a bolt according to an embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the interior of an expansion bolt in use according to an embodiment of the utility model;

[0024] Figure 6 It is a structural schematic diagram of an expansion bolt installation protective sleeve according to an embodiment of the utility model;

[0025] As shown in the figure:

[0026] 100, installation structure; 110, expansion sleeve; 111, first placement groove; 112, expansion groove; 113, anti-skid groove; 120, cylinder; 121, limit groove; 122, elastic sheet; 123, second placement groove; 124, buckle; 125, slot; 200, bolt; 210, bolt body; 220, expansion head; 230, meson; 240, installation head; 300, protective sleeve; 400, eccentric wheel connecting piece; 500, first plate body; 600, second plate body. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] The expansion bolt according to the embodiment of the utility model is described below with reference to the accompanying drawings.

[0029] like Figure 1 and Figure 2 As shown, the expansion bolt of the embodiment of the utility model may include a bolt 200 and an expansion sleeve (not shown in the figure) sleeved outside the bolt 200.

[0030] The expansion sleeve includes two mutually engaged mounting structures 100 , and each mounting structure 100 includes an expansion sleeve 110 and a cylinder body 120 .

[0031] Among them, Figure 3 As shown, the expansion sleeve 110 and the cylinder 120 are connected and integrally formed, a limiting groove 121 is provided on the inner wall of the cylinder 120 , and an elastic sheet 122 is provided in the limiting groove 121 .

[0032] It should be noted that the elastic sheet 122 has a deformable function and resets itself after the deformation.

[0033] In one embodiment of the present invention, an expansion groove 112 for expansion and deformation is provided on the expansion sleeve 110 .

[0034] It is understandable that when the expansion sleeve expands, the expansion groove 112 is deformed, which can make the expansion sleeve 110 deform faster and with less effort, that is, the expansion sleeve 110 can be expanded with a relatively small force.

[0035] In addition, an anti-skid groove 113 is provided on the outer wall of the expansion sleeve 110 . When the expansion sleeve 110 is installed in the corresponding installation hole, the anti-skid groove 113 can effectively reduce the possibility of its separation.

[0036] In an example of the present invention, buckles 124 and slots 125 are respectively provided on both sides of the cylinder 120 , and the buckle 124 of one mounting structure 100 is engaged with the slot 125 of another mounting structure 100 .

[0037] It should be noted that in order to further improve the locking effect between the two mounting structures 100 and improve the overall stability, each cylinder 120 is provided with multiple groups of clips 124 and slots 125 from top to bottom. When the two mounting structures 100 are locked with each other, the multiple clips 124 on one of the mounting structures 100 correspond one by one to the slots 125 on the other mounting structure 100, and are locked with each other.

[0038] like Figure 4 As shown, the bolt 200 includes a bolt body 210 , an expansion head 220 , a spigot 230 , and an installation head 240 .

[0039] The expansion head 220 is arranged at the end of the bolt body 210 and is located in the expansion sleeve 110 . The pion 230 is arranged on the bolt body 210 and is located in the limiting groove 121 . When the bolt 200 moves toward the expansion sleeve 110 , the pion 230 abuts against the elastic sheet 122 .

[0040] The mounting head 240 is disposed at one end of the bolt body 210 away from the expansion head 220 , and the mounting head 240 is a round head, a T-shaped head, or a hexagonal head.

[0041] It should be noted that the mounting head 240 can be connected to the eccentric wheel connector 400 , and the mounting head 240 with different shapes and structures can be provided according to specific installation conditions to improve the adaptability of the mounting head 240 during installation.

[0042] Among them, when the mounting head is a T-shaped head, the T-shaped head can be inserted into the eccentric wheel connector 400 with a smaller opening, and the mounting head and the eccentric wheel connector 400 can be snapped together by rotation, that is, the operator can insert the T-shaped structure of the mounting head along the opening of the eccentric wheel connector 400, and rotate the mounting head 90 degrees, then the T-shaped structure of the mounting head rotates and is snapped into the eccentric wheel connector 400, therefore, compared with the circular mounting head, the T-shaped mounting head can adapt to the smaller size of the eccentric wheel connector 400.

[0043] It is understandable that the outer diameter of the expansion head 220 gradually decreases from one end away from the bolt body 210 to the other end. When the expansion head 220 moves outward following the bolt body 210, the expansion head 220 can expand the expansion sleeve 110 to achieve an expansion effect.

[0044] In one embodiment of the utility model, the expansion sleeve 110 is provided with a first placement groove 111 inwardly along the direction of the cylinder 120, and a second placement groove 123 is provided on the cylinder 120, and the first placement groove 111 is connected to the second placement groove 123, wherein when the bolt 200 is arranged between two engaged mounting structures 100, the expansion head 220 is located between the two first placement grooves 111, and the bolt body 210 is located between the two second placement grooves 123.

[0045] In addition, the cross-sections of the expansion sleeve 110 and the cylinder 120 are both semicircular structures, and the cross-sectional size of the expansion sleeve 110 is larger than the cross-sectional size of the cylinder 120 .

[0046] For the convenience of description, the following takes the installation of wooden panels as an example.

[0047] Specifically, if Figures 1 to 5 As shown, when the relevant staff installs the expansion bolt 200 of the utility model in the installation hole of the wooden board, the relevant staff first engages the two installation structures 100 on both sides of the bolt 200. At this time, the end of the expansion head 220 exceeds the end of the expansion sleeve 110 (that is, the end of the expansion head 220 is exposed outside the expansion sleeve 110), and the meson 230 is stuck in the limit groove 121.

[0048] Then the relevant staff places the eccentric wheel connecting member 400 in the opening of the second plate body 600 , extends the mounting head 240 into the groove of the second plate body 600 , and engages with the eccentric wheel connecting member 400 .

[0049] Next, the relevant staff member picks up the second plate body 600 and brings it vertically close to the first plate body 500, pushes the second plate body 600, and installs the expansion sleeve 110 at the installation position of the first plate body 500. At this time, due to the pushing action, the bolt 200 is subjected to force and drives the meson 230 to abut against the elastic sheet 122. At this time, the elastic sheet 122 is squeezed and deformed, and the bolt 200 can drive the installation structure 100 to move, so that the expansion sleeve 110 is installed in the installation position of the first plate body 500.

[0050] After the expansion sleeve 110 is installed at the installation position of the first plate body 500, the relevant staff releases the second plate body 600. At this time, due to the resetting effect of the elastic sheet 122, the meson 230 is pushed to move toward the second plate body 600, and the meson 230 can drive the bolt body 210 and the expansion head 220 to move. When the expansion head 220 moves toward the second plate body 600, it can stretch the expansion sleeve 110 to deform and expand it. This process is carried out automatically after the relevant staff releases the second plate body 600, and the relevant staff does not need to pull the bolt 200 again, so that the installation of the first plate body 500 and the second plate body 600 is faster. In addition, due to the limiting effect of the meson 230, the bolt body 210 can be prevented from sliding between the two installation structures 100, making the connection between the first plate body 500 and the second plate body 600 more stable.

[0051] In one embodiment of the present invention, Figure 6 As shown, when the two mounting structures 100 are engaged, the two cylinders 120 are covered with protective sleeves 300 . The protective sleeves 300 can not only prevent the two mounting structures 100 from bursting, thereby improving the durability of use, but also improve the overall aesthetics.

[0052] In summary, according to the expansion bolt of the embodiment of the utility model, a limit groove is opened on the cylinder body, and an elastic sheet is arranged in the limit groove, which cooperates with the meson on the bolt so that the meson can be limited in the limit groove. When the bolt is pushed inward, the meson abuts against the elastic sheet and deforms it. After the relevant staff lets go, the elastic sheet can be reset to drive the bolt to move outward, so that the expansion head can expand the expansion sleeve, and the structure is more stable and the operation is more convenient.

[0053] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0055] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An expansion bolt, characterized in that: include: A bolt (200) and an expansion sleeve sleeved outside the bolt (200), wherein: The expansion sleeve comprises two mutually engaging mounting structures (100), each of the mounting structures (100) comprising an expansion sleeve (110) and a cylinder (120), wherein: The expansion sleeve (110) and the cylinder (120) are connected and integrally formed; The inner wall of the cylinder (120) is provided with a limiting groove (121), and an elastic sheet (122) is arranged in the limiting groove (121); The bolt (200) comprises a bolt body (210), an expansion head (220) and a pion (230), wherein: The expansion head (220) is arranged at the end of the bolt body (210) and is located inside the expansion sleeve (110); The meson (230) is arranged on the bolt body (210) and is located in the limiting groove (121). When the bolt (200) moves toward the expansion sleeve (110), the meson (230) abuts against the elastic sheet (122).

2. The expansion bolt according to claim 1, characterized in that: The expansion sleeve (110) is provided with a first placement groove (111) inwardly along the direction of the cylinder (120), and the cylinder (120) is provided with a second placement groove (123), and the first placement groove (111) is communicated with the second placement groove (123), wherein when the bolt (200) is arranged between the two engaged mounting structures (100), the expansion head (220) is located between the two first placement grooves (111), and the bolt body (210) is located between the two second placement grooves (123).

3. The expansion bolt according to claim 1, characterized in that: The cross sections of the expansion sleeve and the cylinder are both semicircular structures, and the cross section size of the expansion sleeve is larger than the cross section size of the cylinder.

4. The expansion bolt according to claim 1, characterized in that: The expansion sleeve (110) is provided with an expansion groove (112) for expansion and deformation.

5. The expansion bolt according to claim 1, characterized in that: An anti-slip groove (113) is provided on the outer wall of the expansion sleeve (110).

6. The expansion bolt according to claim 1, characterized in that: A buckle (124) and a slot (125) are respectively provided on both sides of the cylinder (120), wherein the buckle (124) of one of the mounting structures (100) is engaged with the slot (125) of the other mounting structure (100).

7. The expansion bolt according to claim 1, characterized in that: The outer diameter of the expansion head (220) gradually decreases from one end away from the bolt body (210) to the other end.

8. The expansion bolt according to claim 1, characterized in that: The bolt (200) further comprises an installation head (240), wherein the installation head (240) is arranged at one end of the bolt body (210) away from the expansion head (220), and the installation head (240) is a round head, a T-shaped head or a hexagonal head.

9. The expansion bolt according to claim 1, characterized in that: When the two installation structures (100) are engaged, the outer shells of the two cylinders (120) are provided with protective sleeves (300).

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