Anti-falling expansion shell anchor head

Abstract

An anti-falling expansion shell anchor head relates to the technical field of anchor heads and comprises an anchor head body and expansion pieces, one end of the anchor head body is a limiting head, the other end of the anchor head body is provided with a built-in screw hole in the axial direction, the outer side of the anchor head body is provided with a diagonal plane, and the diagonal plane is provided with a limiting groove in the side where the limiting head is located; the expansion sheets are connected in the limiting grooves in a sliding manner through the limiting grooves; the anchor head body is further provided with an elastic limiting part, and one end of the elastic limiting part is arranged in the built-in screw hole. According to the scheme, the elastic limiting part is specifically composed of the arc-shaped spring ring and the spring piece, one end of the spring piece is located on the inner wall side of the built-in screw hole, it can be avoided that installation of the anchor head is affected due to loosening or sliding when the anchor head is installed, and the expansion piece can be prevented from falling off due to the arrangement of the arc-shaped spring ring. Through the arrangement of the diagonal planes and the limiting grooves of the diagonal planes, the movement of the expansion pieces can be fully facilitated while the guiding effect is guaranteed; and the anchoring strength of the anchor head is effectively improved through the matching of the barbs.

Description

Technical Field

[0001] This utility model relates to the field of anchor head technology, specifically to an anchor head that prevents the shell from falling off. Background Technology

[0002] Expansion shell anchor heads are common civil engineering structural components, typically used to reinforce and stabilize geological bodies such as rock and soil. They generally consist of an outer shell, inner core, anchor bolt, and anchor pad, each part employing a special design to effectively ensure the stability and reliability of the anchor head. They are usually made of high-quality alloy steel, possessing high strength and hardness, and are not prone to deformation or damage during long-term use. Installation is simple and quick, requiring only fixing and rotating the anchor bolt to tighten it, without complex procedures, making them widely applicable.

[0003] The utility model application with application number CN202323111795.7 discloses an expanding shell anchor head, including an anchor head body and two guide strips (expanding plates). The anchor head body has a through groove inside, and the left and right sides of the anchor head body have beveled surfaces. The two guide strips are respectively set on the corresponding beveled surfaces. This invention solves the problems of poor guidance during the operation of wedge-shaped expanding shells, unstable operation of wedge-shaped expanding shells, and easy jamming.

[0004] Currently, in order to improve the installation efficiency and reduce the difficulty of anchor bolt installation, anchor bolt trolleys have begun to be used for anchor head installation. In actual installation, pre-installation is required, that is, the anchor head is directly put onto the trolley. However, due to equipment vibration and uneven ground, the anchor head is prone to falling off the trolley during installation. When using anchor bolt trolleys to install the aforementioned expanding shell anchor head, although the expansion plate has good guidance and stable sliding out, if there is any tilt during installation, the expansion plate is prone to slipping off the anchor head body, or slipping out during feeding and getting stuck on the inner wall, affecting the installation of the anchor head. Therefore, reducing the installation difficulty of this anchor head has become an urgent problem to be solved. Utility Model Content

[0005] I. Technical problems to be solved

[0006] This utility model addresses the shortcomings of existing technologies by proposing an anti-detachment expansion shell anchor head. Through the setting of the elastic limiting part, it can prevent the expansion shell anchor head from falling directly off the trolley during installation due to vibration or terrain limitations, thus affecting the installation.

[0007] II. Specific Technical Solutions

[0008] An anti-detachment expansion anchor head includes an anchor head body and an expansion piece. One end of the anchor head body is a limiting head, and the other end of the anchor head body has an axially formed internal threaded hole. The outer side of the anchor head body is provided with a chamfered surface, and the chamfered surface has a limiting groove on the side where the limiting head is located. The expansion piece is slidably connected in the limiting groove. The anchor head body is also provided with an elastic limiting part, one end of which is disposed in the internal threaded hole.

[0009] Implementation principle and working principle:

[0010] In this design, the expansion joint is slidably connected in the limiting groove of the anchor head body, and the limiting groove is located at the upper part of the bevel. The advantage of this is that the limiting groove is relatively short, which ensures the guiding effect while also facilitating the movement of the expansion joint. The built-in screw hole can guide the anchor rod and stably push out the expansion joint, thus facilitating anchoring. One end of the elastic limiting part is set in the built-in screw hole, which can fill the gap between the built-in screw hole and the anchor rod installation trolley, preventing the expansion shell anchor rod from falling off after pre-installation.

[0011] Preferably, the elastic limiting part further includes a plurality of spring plates, each of which is snapped onto the end of the anchor head body away from the limiting head; the outer surface of the anchor head body is provided with an installation groove, one end of the spring plate is located in the installation groove, and the other end of the spring plate is located on the inner wall of the anchor rod body; the beneficial effect of this preferred embodiment is that, with one end of the spring plate located on one side of the inner wall of the anchor rod body, the spring plate acts as a shim during anchor head installation, which can reduce the shaking of the anchor head during installation and prevent it from falling off the anchor rod trolley after pre-installation and affecting the installation. The installation groove also facilitates the snapping and installation of the spring plate.

[0012] Preferably, the mounting groove gradually increases in depth towards the side near the limiting head; the advantage of this preferred design is that the mounting groove facilitates the installation of the spring sheet, and the depth of the groove helps to ensure the installation of the spring sheet and maintain its stability.

[0013] Preferably, the outer side of the expansion piece is provided with a plurality of barbs along the length direction, and the anchor head body is also provided with an arc-shaped spring ring, which is engaged between adjacent barbs. The beneficial effect of this preferred embodiment is that the barbs can effectively improve the anchoring force of the anchor head, and the arc-shaped spring ring located between adjacent barbs can play a limiting role, resulting in better stability.

[0014] Preferably, the arc-shaped spring coil has a center angle greater than 270°. The beneficial effect of this preferred option is that the elastic limiting part uses an unsealed arc-shaped spring coil, which can easily open the arc-shaped spring coil when the expansion piece is pushed open. At the same time, the center angle is greater than 270°, which can play a fastening role and prevent the expansion piece from falling off during installation.

[0015] Preferably, the arc-shaped spring coil includes two free ends, which are located at the ends of adjacent expansion plates; the ends of the two free ends extend away from the anchor head body and are opposite to each other; the beneficial effect of this preferred embodiment is that the structure of the free ends of the arc-shaped spring coil is conducive to installing the spring coil on the anchor head. In specific installation, it is only necessary to face the free end towards the anchor head and then press to achieve engagement.

[0016] Preferably, the arc-shaped spring coil has an inwardly recessed transition section at the junction of the expansion plate and the anchor head body. The advantage of this preferred embodiment is that the inwardly recessed transition section effectively improves the fit between the arc-shaped spring coil and the anchor head, resulting in a better fastening effect.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. In this solution, the elastic limiting part includes an arc-shaped spring ring and a spring plate. One end of the spring plate is located on the inner wall side of the built-in screw hole, which can prevent the anchor head from being affected by loosening or sliding during installation. The arc-shaped spring ring can prevent the expansion plate from falling off.

[0019] 2. By setting the beveled surface and the limiting groove of the beveled surface, the guiding effect is ensured while also facilitating the movement of the expansion piece; the barbs effectively improve the anchoring strength of the anchor head. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the assembly of the anti-detachment expansion shell anchor head of this utility model.

[0021] Figure 2 This is a schematic diagram of the main structure of the anchor head of the anti-detachment expansion shell anchor head of this utility model.

[0022] Figure 3 This is a schematic diagram of the arc-shaped spring ring of the anti-detachment expansion shell anchor head of this utility model.

[0023] Figure 4 This is a schematic diagram of the spring sheet structure of the anti-detachment expansion shell anchor head of the utility model.

[0024] Explanation of the reference numerals in the attached figures:

[0025] Anchor head body 100, limiting head 101, built-in screw hole 102, beveled surface 103, limiting groove 104, mounting groove 105, expansion piece 200, barb 201, elastic limiting part 300, arc spring ring 301, free end 302, inward transition section 303, spring plate 304. Detailed Implementation

[0026] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] like Figure 1-4 As shown:

[0028] Specifically, such as Figure 1 and 2 An anti-detachment expansion shell anchor head includes an anchor head body 100 and expansion plates 200. The upper end of the anchor head body 100 is a limiting head 101, which helps to ensure the strength of the anchor head. The other end of the anchor head body 100 has an axially formed internal screw hole 102, which allows the anchor head to be pushed more smoothly by the anchor rod. On both the left and right sides of the anchor head body 100, there are beveled surfaces 103. The beveled surfaces 103 have a limiting groove 104 on the side where the limiting head 101 is located. On the opposite side of the two expansion plates 200, there are protrusions, which cooperate with the limiting grooves 104. The expansion plates are slidably connected to the limiting grooves 104 through the limiting grooves 104. The anchor head body 100 also has an elastic limiting part 300, which is used to limit the sliding of the expansion plates 200 in the limiting grooves 104.

[0029] Specifically, such as Figure 3 and Figure 4 The elastic limiting part 300 includes an arc-shaped spring coil 301 and a spring plate 303; specifically, the central angle of the arc-shaped spring coil 301 is greater than 270°; a plurality of barbs 201 are provided on the outer side of the expansion plate 200 along the length direction, and the arc-shaped spring coil 301 is engaged between two adjacent barbs 201 of the same expansion plate; specifically, the arc-shaped spring coil 301 includes two free ends 302, the free ends 302 are located at the end of the adjacent expansion plate 200 that is close to each other; the ends of the two free ends 302 both extend away from the anchor head body 100 and are opposite to each other; the unsealed arc-shaped spring coil, as an elastic limiting part, can easily open the arc-shaped spring coil 301 when the expansion plate 200 is pushed open; at the same time, the central angle is greater than 270°, which can play a fastening role and prevent the expansion plate 200 from falling off during installation. The structure of the free end of the arc-shaped spring coil 301 facilitates its installation on the anchor head. During installation, simply place the free end 302 towards the anchor head and press to engage it; this is simple and convenient. In practice, the arc-shaped spring coil 301 has an inwardly recessed transition section 303 at the junction of the expansion piece 200 and the anchor head body 100. The inwardly recessed transition section 303 effectively improves the fit between the arc-shaped spring coil 301 and the anchor head body and the expansion piece 200, resulting in a better fastening effect.

[0030] Among them, several spring sheets 304 of the elastic limiting part 300, such as Figure 4 The spring plates 304 are all snapped onto the lower end of the anchor head body 100. An installation groove 105 is provided on the outer surface of the anchor head body 100. One end of the spring plate 304 is located within the installation groove 105, and the other end of the spring plate 304 is located on the inner wall of the anchor head body 100. With one end of the spring plate 304 located on one side of the inner wall of the anchor head body 100, the spring plate 304 acts as a shim during anchor head installation, reducing shaking and preventing it from falling off or affecting installation. The installation groove 105 prevents the spring plate 304 from falling off. The depth of the installation groove 105 gradually increases towards the side near the limiting head 101. This design of the installation groove 105 facilitates the installation of the spring plate 304, and its depth helps ensure the stability of the spring plate. In specific implementations, the arc-shaped spring coil 301 and the spring plate 304 can also be connected to improve their integration.

[0031] In this design, the expansion piece 200 is slidably connected in the limiting groove 104 of the anchor head body 100. The limiting groove 104 is located on the upper part of the inclined surface 103. The advantage of this is that the limiting groove 104 is relatively short, which ensures the guiding effect while also facilitating the movement of the expansion piece 200. The built-in screw hole 102 can guide the anchor rod and stably push out the expansion piece 200, thus facilitating anchoring. The elastic limiting part 200 can effectively prevent the expansion piece from falling off due to excessive shaking during the installation of the anchor head, or affecting the installation of the anchor head. When the expansion piece 200 opens to limit, the elastic limiting part 300 can be stretched or broken, which is simple and convenient.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims.

Claims

1. A fall-preventing swabbing anchor head, characterized by: The utility model provides an anchor head, including anchor head body (100) and expansion piece (200), one end of anchor head body (100) is limit head (101), and the other end of anchor head body (100) is provided with built-in screw hole (102) along the axial direction, the outside of anchor head body (100) is provided with bevel (103), and the side of bevel (103) at limit head (101) is provided with limit slot (104), expansion piece (200) is connected in limit slot (104) slidingly, anchor head body (100) is further provided with elastic limit part (300), and one end of elastic limit part (300) is arranged in built-in screw hole (102).

2. The anti-release buoyancy jacket mooring head according to claim 1, characterized in that: The elastic limit part (300) includes a plurality of spring pieces (304), the spring pieces (304) are all clamped at one end of the anchor head body (100) away from the limit head (101), and one end of the spring pieces (304) is located on one side of the inner wall of the built-in screw hole (102).

3. The anti-release mooring buoy of claim 2, wherein: The outer surface of the anchor head body (100) is provided with a mounting groove (105), and the other end of the spring piece (304) is located in the mounting groove (105).

4. The anti-release mooring buoy according to claim 3, wherein: The mounting groove (105) gradually increases in depth towards the side close to the limit head (101).

5. The anti-release buoyancy jacket mooring head according to claim 1, characterized in that: The outer side of the expansion piece (200) is provided with a plurality of barbs (201) along the length direction, and the anchor head body (100) is further provided with an arc-shaped spring ring (301), which is clamped between adjacent barbs (201).

6. The anti-release buoyancy jacket mooring head according to claim 5, characterized in that: The central angle of the arc-shaped spring ring (301) is greater than 270°.

7. The anti-release buoyancy jacket mooring head according to claim 6, characterized in that: The arc-shaped spring ring (301) includes two free ends (302), and the free ends (302) are located at one end of adjacent expansion pieces (200); the end portions of the two free ends (302) extend away from the anchor head body (100) and are opposite.

8. The anti-release buoyancy jacket mooring head according to claim 6, characterized in that: The arc-shaped spring ring (301) is provided with a retracted transition section (303) at the junction of the expansion piece (200) and the anchor head body (100).

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