Self-locking type double-expansion anchor rod

Abstract

The self-locking type double-expansion anchor rod comprises a left expansion cylinder, a right expansion cylinder, a screw rod and an anchor rod assembly, a left countersunk head block and a right countersunk head block are fixed to the screw rod in a spaced mode, the left countersunk head block is arranged at the right end of the left expansion cylinder, and the right countersunk head block is arranged at the left end of the right expansion cylinder; the left end of the screw is arranged in the left expansion cylinder in a sliding mode, a limiting block is fixed to the left end of the screw, a locking mechanism is arranged on the left expansion cylinder, after the limiting block moves leftwards, the limiting block is locked through the locking mechanism, a limiting ring is fixed in the right expansion cylinder, the right end of the screw penetrates through the limiting ring and is in threaded connection with the anchor rod assembly, and the anchor rod assembly moves leftwards to drive the screw to move leftwards. The anchor rod assembly is rotated to push the right expansion cylinder to move leftwards. According to the double-expansion anchor rod, double-expansion anchoring is achieved, the limiting block is locked through the locking mechanism, locking of the screw rod is achieved, and anchoring stability is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of expansion anchor rod, especially a double expansion anchor rod with self-locking. BACKGROUND

[0002] After the completion of the drilling of the chamber or high slope and the washing, the process of inserting the anchor rod first and then grouting is adopted, the existing expansion anchor rod is mostly single expansion anchor rod, the anchoring stability is limited, and the expansion mechanism is not locked and positioned, and in the subsequent construction process, the expansion mechanism is also prone to resetting, the anchoring is loose, the anchor rod moves outward and other problems, which affect the anchoring stability. SUMMARY

[0003] The utility model provides a double expansion anchor rod with self-locking, realizes double expansion anchoring, locks and positions the limiting block through the locking mechanism, and further improves the anchoring stability.

[0004] The technical scheme of the utility model is as follows: a double expansion anchor rod with self-locking, comprising a left expansion cylinder, a right expansion cylinder, a screw rod and an anchor rod assembly, the screw rod is fixed with a left sink head block and a right sink head block at intervals, the left sink head block is arranged at the right end of the left expansion cylinder, and the right sink head block is arranged at the left end of the right expansion cylinder; the left end of the screw rod is slidably arranged in the left expansion cylinder, the left end of the screw rod is fixed with a limiting block, the left expansion cylinder is provided with a locking mechanism, the limiting block is locked through the locking mechanism after moving left, a limiting ring is fixed in the right expansion cylinder, the right end of the screw rod passes through the limiting ring and is connected with the anchor rod assembly in a threaded mode, the anchor rod assembly moves left to drive the screw rod to move left, the anchor rod assembly is rotated to push the right expansion cylinder to move left.

[0005] Further, the limiting block is a tapered block, the end with a smaller diameter faces left, the locking mechanism comprises locking seats arranged symmetrically in the left expansion cylinder, the locking seats are located at the left side of the limiting block, the locking seats are provided with limiting rods which slide radially, the inner end of the limiting rod passes through the locking seat and a compression spring in sequence and is connected with a locking block, the left end of the locking block is a flat end, and the right end is an inclined end.

[0006] Further, the screw rod on the left side of the limiting block is fixed with a left guide block, the left guide block is located at the left side of the locking mechanism, the left end of the left expansion cylinder is a closed end, and a left supporting spring is arranged between the closed end and the left guide block.

[0007] Further, the anchor rod assembly comprises a locking nut, a guide cylinder and an anchor rod body which are fixed and connected in sequence from left to right, the locking nut abuts against the right side of the limiting ring, the right end of the screw rod passes through the limiting ring and is connected with the locking nut in a threaded mode.

[0008] Further, a right supporting spring is arranged between the right sink head block and the limiting ring.

[0009] Further, the outer side of the guide cylinder is fixed to the right guide block, and the right guide block is located in the right expansion cylinder.

[0010] Further, the right end of the left expansion cylinder and the left end of the right expansion cylinder are provided with slotted joints.

[0011] Further, the left end of the left expansion cylinder is fixed with a fixed block.

[0012] The utility model discloses the beneficial effects of:

[0013] The utility model discloses the cooperation of left countersunk head block and left expansion cylinder, realizes first expansion anchoring when screw rod left shift, and after the left shift of spacing block driven by screw rod, locking mechanism locks spacing block, and the right shift of spacing block is limited, and then the right shift of screw rod is limited, avoids subsequent left countersunk head block right shift, and the anchoring of left expansion cylinder appears loose. In order to ensure the stability of anchoring, by rotating anchoring assembly, make right expansion cylinder left shift, realize second expansion anchoring through the cooperation of right countersunk head block and right expansion cylinder. DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the drawing needed to be used in the embodiment or prior art description simple introduction, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0015] Figure 1 It is the structural schematic diagram of the utility model;

[0016] Figure 2 It is the internal structure schematic diagram of the utility model;

[0017] Figure 3 It is Figure 2 The local enlarged structure schematic diagram of A.

[0018] Left expansion cylinder 1, right expansion cylinder 2, screw rod 3, left countersunk head block 4, right countersunk head block 5, slotted joint 6, spacing block 7, left guide block 8, left support spring 9, locking mechanism 10, spacing ring 11, right support spring 12, locking seat 13, limiting rod 14, compression spring 15, locking block 16, lock nut 17, guide cylinder 18, anchor rod body 19, fixed block 20. DETAILED DESCRIPTION

[0019] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort under the premise that no creative effort is made, belong to the scope of protection of the present application.

[0020] Embodiment 1

[0021] As shown in Figure 1 and 2 , a self-locking double expansion anchor rod comprises a left expansion cylinder 1, a right expansion cylinder 2, a screw rod 3, and an anchor rod assembly. The screw rod 3 is fixed with a left sink head block 4 and a right sink head block 5 at intervals. The left sink head block 4 is arranged at the right end of the left expansion cylinder 1, and the right sink head block 5 is arranged at the left end of the right expansion cylinder 2. The right end of the left expansion cylinder 1 and the left end of the right expansion cylinder 2 are both provided with a slotted gap 6. The left end of the left expansion cylinder 1 is fixed with a fixed block 20. When the double expansion anchor rod is installed, the fixed block 20 is inserted into the bottom of the drill hole.

[0022] The left end of the screw rod 3 is slidably arranged in the left expansion cylinder 1. The left end of the screw rod 3 is fixed with a limiting block 7. The screw rod 3 on the left side of the limiting block 7 is fixed with a left guide block 8. The left end of the left expansion cylinder 1 is a closed end. A left supporting spring 9 is arranged between the closed end and the left guide block 8.

[0023] A locking mechanism 10 is arranged on the left expansion cylinder 1 between the left guide block 8 and the limiting block 7. The right end of the screw rod 3 is arranged in the right expansion cylinder 2. A limiting ring 11 is fixed in the right expansion cylinder 2. The right end of the screw rod 3 penetrates through the limiting ring 11 and is threadedly connected with the anchor rod assembly. The anchor rod assembly is arranged in the right expansion cylinder 2 and is located on the right side of the limiting ring 11. A right supporting spring 12 is arranged between the right sink head block 5 and the limiting ring 11.

[0024] The anchor rod assembly moves left, driving the screw rod 3 and the right expansion cylinder 2 to move left. The screw rod 3 drives the right sink head block 5, the left sink head block 4, and the limiting block 7 to move left. The left sink head block 4 causes the right end of the left expansion cylinder 1 to open and tightly adhere to the inner wall of the drill hole, realizing the first anchoring. At the same time, the locking mechanism 10 locks the limiting block 7. The limiting block 7 limits the right movement of the screw rod 3. The left supporting spring 9 is compressed and plays a buffering role. Then, the anchor rod assembly is rotated. Since the screw rod 3 cannot move right, the anchor rod assembly moves left along the screw rod 3. At the same time, the right expansion cylinder 2 is pushed left by the limiting ring 11. The right sink head block 5 causes the left end of the right expansion cylinder 2 to open and tightly adhere to the inner wall of the drill hole, realizing the second anchoring. At the same time, the right supporting spring 12 is compressed and plays a buffering role.

[0025] Embodiment 2

[0026] This embodiment is basically the same as Embodiment 1, except that Figure 2 and 3As shown, the limiting block 7 is a conical block with the smaller diameter end facing left. The locking mechanism 10 includes a locking seat 13 symmetrically fixed inside the left expansion cylinder 1. The locking seat 13 is located on the left side of the limiting block 7. A radially sliding limiting rod 14 is provided on the locking seat 13. There are two limiting rods on each side. The inner end of the limiting rod 14 passes through the locking seat 13 and the compression spring 15 in sequence, and is fixedly connected to the locking block 16. The left end of the locking block 16 is a flat end, and the right end is a beveled end.

[0027] When the limiting block 7 moves to the left, the locking block 16 retracts into the locking seat 13 through the cooperation of the inclined end and the conical block. The limiting block 7 passes over the locking block 16 and is located to the left of the locking block 16. Since the left end of the locking block 16 is a flat end, the limiting block 7 cannot move in the opposite direction, thus locking the limiting block 7.

[0028] Example 3

[0029] This embodiment is basically the same as embodiment 1 or 2, except that: Figure 2 As shown, the anchor bolt assembly includes a set nut 17, a guide cylinder 18, and an anchor bolt body 19, which are fixedly connected from left to right. The set nut 17 is placed inside the right expansion cylinder 2 and abuts against the right side of the limiting ring 11. The outer side of the guide cylinder 18 is fixed to the right guide block, which is located inside the right expansion cylinder 2. The right end of the screw 3 passes through the limiting ring 11 and is threadedly connected to the set nut 17.

[0030] Press the anchor body 19 to the left to move the screw 3 to the left. The screw 3 drives the limiting block 7 and the left countersunk block 4 to move to the left. The left countersunk block 4 opens the right end of the left expansion cylinder 1. Finally, the locking mechanism 10 locks the limiting block 7, thereby locking the screw 3. Then rotate the anchor body 19. Since the screw 3 is locked and cannot move to the right, the set nut 17 moves to the left along the screw 3 and pushes the right expansion cylinder 2 to the left through the limiting ring 11. The right countersunk block 5 opens the left end of the right expansion cylinder 2.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-locking double expansion anchor rod, characterized by: The utility model provides an anchor rod expansion device, including left expansion cylinder, right expansion cylinder, screw rod and anchor rod assembly, interval fixed have left sink head piece and right sink head piece on screw rod, left sink head piece places right end of left expansion cylinder, right sink head piece places left end of right expansion cylinder, the left end of screw rod is placed in left expansion cylinder, and the left end of screw rod is fixed with limit block, and the lock mechanism is arranged on left expansion cylinder, and limit block is locked through the lock mechanism after left moving, and limit ring is fixed in right expansion cylinder, and the right end of screw rod passes through limit ring and is connected with anchor rod assembly screw, and anchor rod assembly left moving drives screw rod left moving, and rotates anchor rod assembly, and pushes right expansion cylinder left moving.

2. A self-locking double expansion anchor rod according to claim 1, characterized in that: The limit block is a conical block, and the smaller diameter end faces left, the lock mechanism includes symmetrical lock seat arranged in the left expansion cylinder, the lock seat is located at the left side of the limit block, the lock seat is provided with a radial sliding limit rod, the inner end of the limit rod passes through the lock seat and compression spring in sequence and is connected with the lock block, the left end of the lock block is a flat end, and the right end is a bevel end.

3. A self-locking double expansion anchor rod according to claim 1 or 2, characterized in that: The screw rod on the left side of the limit block is fixed with a left guide block, the left guide block is located at the left side of the lock mechanism, the left end of the left expansion cylinder is a closed end, and a left supporting spring is arranged between the closed end and the left guide block.

4. A self-locking double expansion anchor rod according to claim 1 or 2, characterized in that: The anchor rod assembly includes a tight nut, a guide cylinder and an anchor rod body fixedly connected in sequence from left to right, the tight nut abuts against the right side of the limit ring, the right end of the screw rod passes through the limit ring and is connected with the tight nut in screw.

5. A self-locking double expansion anchor rod as claimed in claim 1, wherein: A right supporting spring is arranged between the right sink head block and the limit ring.

6. A self-locking double expansion anchor rod as claimed in claim 4, characterized in that: The outer side of the guide cylinder is fixed to the right guide block, and the right guide block is located in the right expansion cylinder.

7. A self-locking double expansion anchor rod as claimed in claim 1, wherein: The right end of the left expansion cylinder and the left end of the right expansion cylinder are both provided with a slotted gap.

8. A self-locking double expansion anchor rod as claimed in claim 1, wherein: The left end of the left expansion cylinder is fixed with a fixed block.

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