Novel expansion shell type anchor head of hollow anchor rod

Abstract

The utility model discloses a novel expansion shell type anchor head of a hollow anchor rod, and belongs to the technical field of expansion shell anchor heads. Comprising an inner wedge body and expansion shell pieces, opening grooves corresponding to the expansion shell pieces are formed in the two sides of the inner wedge body, sliding grooves are formed in the tops of the opening grooves, the opening diameters of the opening grooves are gradually reduced from bottom to top, guide sliding blocks corresponding to the sliding grooves are arranged at the upper ends of the inner sides of the expansion shell pieces, and T-shaped locking blocks are arranged at the lower ends of the inner sides of the expansion shell pieces. And the T-shaped locking block can move up and down in the open slot. According to the novel expansion shell type anchor head, a traditional heavy type anchor head structure is changed, a traditional structure that the inner side of the expansion shell piece is integrally provided with a guide sliding block is changed, the guide sliding block at the top only plays a role in installing and fixing the expansion shell piece, and when the expansion shell piece expands outwards, the guide sliding block departs from a sliding groove, so that the expansion shell piece is fixed. At the moment, the T-shaped locking block plays a role in limiting and fixing the expansion shell piece, the expansion shell piece is locked, and the problem that the expansion shell piece slips off from the inner wedge body is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of expansion shell anchor head, specifically a hollow anchor rod novel expansion shell type anchor head. BACKGROUND

[0002] The basic principle of the mechanical expansion shell prestressed anchor rod is to use the tapered end to expand two pieces of shell with barbs when rotating along the thread, so that the shell is pressed on the rock wall to generate anchoring force. At present, the anchor head at the top of the expansion shell anchor rod is mainly composed of a hollow inner wedge and two expansion shell pieces. A long strip guide sliding block is arranged on the inner side of the expansion shell piece, and a sliding groove is formed on the inner wedge. When the anchor rod is inserted into the inner wedge, the guide sliding block is pushed to move in the sliding groove, and then the expansion shell piece is expanded.

[0003] However, in actual application, since only the guide sliding block is arranged on the inner side of the traditional expansion shell anchor head, the guide sliding block is prone to falling off when the expansion shell piece is expanded to the maximum angle, and cannot be locked on the inner wedge, which affects the assembly efficiency of the anchor rod and the anchor head.

[0004] Therefore, the utility model designs a novel expansion shell type anchor head, changes the shape of the opening groove on both sides of the inner wedge and the length of the guide sliding block on the inner side of the expansion shell piece, and designs a T-shaped lock block on the inner side of the inner wedge, so that the guide sliding block only plays a role of installation and fixation, and when the expansion shell piece is expanded to the maximum angle, the T-shaped lock block can lock the expansion shell piece on the inner wedge, avoiding the problem that the expansion shell piece automatically falls off after being expanded. The structure design is scientific and reasonable, and has high practicability. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a hollow anchor rod novel expansion shell type anchor head to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme.

[0007] A hollow anchor rod novel expansion shell type anchor head, which comprises an inner wedge and an expansion shell piece, opening grooves corresponding to the expansion shell piece are formed on both sides of the inner wedge, a sliding groove is arranged on the top of the opening groove, the caliber of the opening groove gradually decreases from bottom to top, a guide sliding block corresponding to the sliding groove is arranged on the upper end of the inner side of the expansion shell piece, a T-shaped lock block is arranged on the lower end of the inner side of the expansion shell piece, and the T-shaped lock block can move up and down in the opening groove.

[0008] As a further preferred scheme of the utility model, the T-shaped lock block comprises a connecting column arranged on the lower end of the inner side of the expansion shell piece, and a stop block connected to one end of the connecting column and penetrating through the opening groove.

[0009] As a further preferred scheme of the utility model, an outwardly expanding inclined surface is arranged on the lower end of the inner side of the expansion shell piece.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The new expansion shell type anchor head changes the traditional heavy anchor head structure, only retains the upper end guide sliding block on the inner side of the expansion shell piece, and sets a T-shaped lock block at the lower end of the inner side of the expansion shell, changes the traditional structure that the inner side of the expansion shell piece is a whole guide sliding block, and makes the upper end guide sliding block only play a role of installing and fixing the expansion shell piece, when the expansion shell piece expands outward, the guide sliding block moves away from the sliding groove, at this time, the T-shaped lock block plays a role of limiting and fixing the expansion shell piece, locks the expansion shell piece, and avoids the problem that the expansion shell piece slides off the inner wedge body; meanwhile, the lower end surface of the expansion shell piece is designed as an inclined outward expansion inclined surface, the expansion angle of the expansion shell piece is improved, and the opening groove on the inner wedge body is designed to be wide at the lower end and narrow at the upper end, so that the T-shaped lock block can be easily inserted from the lower end of the opening groove, and the assembly of the expansion shell piece is easily realized, the design is scientific and reasonable, and the practicality is high. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic view of the hollow anchor rod new expansion shell type anchor head expansion shell piece when expanding;

[0013] Figure 2 It is a three-dimensional structural schematic view of the hollow anchor rod new expansion shell type anchor head inner wedge body;

[0014] Figure 3 It is a three-dimensional structural schematic view of the hollow anchor rod new expansion shell type anchor head expansion shell piece;

[0015] Figure 4 It is a sectional view structural schematic view of the hollow anchor rod new expansion shell type anchor head expansion shell piece when expanding;

[0016] Figure 5 It is a three-dimensional structural schematic view of the hollow anchor rod new expansion shell type anchor head expansion shell piece when contracting;

[0017] Figure 6 It is a side view structural schematic view of the hollow anchor rod new expansion shell type anchor head expansion shell piece.

[0018] In the drawing: 1, inner wedge body; 2, expansion shell piece; 3, opening groove; 4, guide sliding block; 5, T-shaped lock block; 6, sliding groove; 7, connecting column; 8, stop block; 9, outward expansion inclined surface. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application. Embodiment 1

[0020] Please refer to Figures 1-6 The embodiment provides a new expanding shell type anchor head of hollow anchor rod, which comprises an inner wedge body 1 and an expanding shell piece 2, and opening grooves 3 corresponding to the expanding shell piece 2 are formed on both sides of the inner wedge body 1, and sliding grooves 6 are arranged on the top of the opening grooves 3, wherein the inner wedge body 1 and the expanding shell piece 2 are conventional general expanding shell anchor head structures familiar to those skilled in the art, the inner wedge body 1 is hollow, and a thread matched with the anchor rod is arranged on the inner wall. In the application, as shown in the drawings, the opening grooves 3 are gradually reduced from bottom to top, that is, the opening grooves 3 are wide at the bottom and narrow at the top, a guide sliding block 4 corresponding to the sliding groove 6 is arranged on the inner side of the upper end of the expanding shell piece 2, a T-shaped lock block 5 is arranged on the inner side of the lower end of the expanding shell piece 2, and the T-shaped lock block 5 can move up and down in the opening groove 3. Figure 2 As shown in the drawings, the T-shaped lock block 5 comprises a connecting column 7 arranged on the inner side of the lower end of the expanding shell piece 2, and one end of the connecting column 7 penetrates through the opening groove 3 and is connected with a stop block 8. Figure 3 As shown in the drawings, the T-shaped lock block 5 comprises a connecting column 7 arranged on the inner side of the lower end of the expanding shell piece 2, and one end of the connecting column 7 penetrates through the opening groove 3 and is connected with a stop block 8. Figure 3 As shown in the drawings, in order to improve the expanding angle of the expanding shell piece 2, an outwardly expanding inclined surface 9 is arranged on the inner side of the lower end of the expanding shell piece 2, so that when the guide sliding block 4 leaves the sliding groove 6, the expanding shell piece 2 can be expanded to the maximum angle. Figure 6

[0021] When assembled, the T-shaped lock block 5 is inserted into the inner wedge body 1 from the lower end of the opening groove 3, then the expanding shell piece 2 is lifted up, the T-shaped lock block 5 moves along the opening groove 3, then the guide sliding block 4 at the top of the expanding shell piece 2 is inserted into the sliding groove 6 at the top of the inner wedge body 1, and the assembly of the expanding shell anchor head is completed, and the state is shown in the drawings. Figure 5

[0022] When matched with the anchor rod, the anchor rod is screwed into the inner wedge body 1 from the bottom, when the anchor rod moves up in the inner wedge body 1, the expanding shell piece 2 is pushed out upward, the guide sliding block 4 leaves the sliding groove 6, the expanding shell piece 2 is expanded, the opening groove 3 limits the T-shaped lock block 5, and when the expanding shell piece 2 is expanded, the expanding shell piece 2 is prevented from falling off from the inner wedge body 1.

[0023] It should be noted that the above embodiment is only used for specifically and clearly describing the technical scheme and technical features of the application. For those skilled in the art, the scheme or features belonging to the prior art or common knowledge are not described in detail in the above embodiment.

[0024] In addition, the technical scheme of the application is not limited to the above embodiment, and those skilled in the art should regard the specification as a whole, and the technical scheme in each embodiment can be appropriately combined, so that other implementation manners can be formed which can be understood by those skilled in the art.​​

Claims

1. A novel hollow anchor bolt with an expansion shell, comprising an inner wedge (1) and an expansion shell plate (2), wherein the inner wedge (1) has openings (3) on both sides corresponding to the expansion shell plate (2), and a sliding groove (6) is provided at the top of the openings (3), characterized in that, The opening diameter of the slot (3) gradually decreases from bottom to top. The upper inner side of the expansion shell (2) is provided with a guide slider (4) corresponding to the sliding groove (6). The lower inner side of the expansion shell (2) is provided with a T-shaped locking block (5). The T-shaped locking block (5) can move up and down in the opening slot (3).

2. The novel expansion-shell type anchor head for hollow anchor bolts according to claim 1, characterized in that, The T-shaped locking block (5) includes a connecting post (7) located at the lower end of the inner side of the expansion shell (2), with one end of the connecting post (7) passing through the opening groove (3) and connected to a stop block (8).

3. The novel expansion-shell type anchor head for hollow anchor bolts according to claim 1, characterized in that, The inner lower end of the expansion shell (2) is provided with an outwardly expanding inclined surface (9).

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