Rear underreamed anchor bolt

Abstract

The utility model relates to the technical field of anchor bolts, and provides a rear underreaming anchor bolt which comprises a bolt rod, a sleeve, an expansion mechanism, a driving mechanism and a supporting mechanism, a sliding groove and a sliding hole are formed in the bolt rod, the sleeve is arranged on the bolt rod in a sleeved mode, a plurality of separating grooves are formed in the sleeve, and the expansion mechanism is arranged on the bolt rod and used for expanding the sleeve. By means of the technical scheme, the problems that in the prior art, the inner wall of a hole is relatively smooth, after an expansion piece is expanded, after a bolt is subjected to strong pulling force, the rear expanded-base anchor bolt slides out of the hole easily, and the bolt is prone to falling off are solved. And the fixing effect is easily influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor bolts, in particular to a rear-expanded bottom anchor bolt. Background Art

[0002] The post-expanded bottom anchor is a commonly used anchor in the construction industry. It is usually equipped with components such as a screw and an expansion sleeve. It is installed in a pre-processed drilled hole. The bottom end of the expansion sleeve expands to implement anchoring. As it expands, it squeezes the side wall of the bottom end of the drilled hole, thereby fixing the anchor.

[0003] When using the existing rear-enlarged bottom anchor bolt, the operator needs to enlarge the hole at the position to be fixed, then insert the rear-enlarged bottom anchor bolt into the hole, and tighten the expansion piece by twisting the bolt to expand the expansion piece in the hole for fixation. However, the inner wall of the hole is relatively smooth. After the expansion piece expands, the bolt is subjected to a strong tensile force, which can easily cause the rear-enlarged bottom anchor bolt to slip out of the hole, thereby easily affecting the fixing effect. Utility Model Content

[0004] The utility model provides a rear-enlarged bottom anchor bolt, which solves the problem in the related art that the inner wall of the hole is relatively smooth, and after the expansion piece expands, the bolt is subjected to a strong pulling force, which easily causes the rear-enlarged bottom anchor bolt to slip out of the hole, thereby easily affecting the fixing effect.

[0005] The technical solution of the utility model is as follows: a rear bottom expansion anchor bolt, comprising: a bolt rod, a sleeve, an expansion mechanism, a driving mechanism and a supporting mechanism;

[0006] The bolt rod is provided with a sliding groove and a sliding hole;

[0007] The sleeve is sleeved on the bolt rod, and a plurality of separation grooves are formed on the sleeve;

[0008] The expansion mechanism is arranged on the bolt rod and is used to expand the sleeve;

[0009] The driving mechanism is arranged on the bolt rod and is used to drive the bolt rod to move;

[0010] The supporting mechanism is arranged on the bolt rod and is used for supporting the sleeve.

[0011] Preferably, the expansion mechanism comprises: an expansion ring, a wedge block and a reaming knife;

[0012] The expansion ring is fixedly connected to the bolt rod and communicated with the sliding hole;

[0013] There are a plurality of wedge-shaped blocks, and the plurality of wedge-shaped blocks are fixedly connected to the expansion ring;

[0014] There are two reaming knives, and two sliding grooves are arranged on the sleeve. The two reaming knives are respectively slidably arranged in the two sliding grooves, and the opposite ends of the two reaming knives are respectively in contact with the corresponding two wedge blocks.

[0015] Further, the driving mechanism includes: a bolt, a fixing plate and a nut;

[0016] The bolt is fixedly connected to the bolt rod;

[0017] The fixing plate is fixedly connected to the sleeve, a through hole is opened on the fixing plate, and the bolt is arranged in the through hole;

[0018] The nut is threadedly connected to the bolt.

[0019] Furthermore, the support mechanism includes: a support plate, a support block, a transmission assembly and a power assembly;

[0020] There are multiple support plates, and the expansion ring is provided with multiple rotation grooves, and the multiple support plates are rotatably arranged in the multiple rotation grooves respectively;

[0021] There are a plurality of support blocks, and the plurality of support blocks are rotatably connected to a plurality of support plates respectively;

[0022] The transmission assembly is arranged in the expansion ring and is used to drive the support plate to swing;

[0023] The power assembly is arranged in the bolt rod and is used to drive the transmission assembly to move.

[0024] Furthermore, the transmission assembly includes: a transmission rod and a connecting plate;

[0025] There are multiple transmission rods, and the multiple transmission rods are rotatably connected to multiple support plates respectively;

[0026] The connecting plate is rotatably connected between a plurality of transmission rods.

[0027] As a further solution of the present application, the power assembly includes: a power screw and a power block;

[0028] The power screw is rotatably arranged on the connecting plate, a screw hole is provided on the bolt, and the power screw is threadedly connected in the screw hole;

[0029] The power block is fixedly connected to the power screw.

[0030] As a further solution of the present application, two limit plates are fixedly connected in the sleeve, and both limit plates are provided with limit grooves connected to the sliding grooves provided on the sleeve, and the two reaming knives are respectively slidably arranged in the two limit grooves.

[0031] On the basis of the above-mentioned solution, a sliding rod is fixedly connected inside the sleeve, and the sliding rod is slidably arranged in a sliding groove provided on the bolt rod.

[0032] Further on the basis of the above solution, a through hole is opened on the sliding rod, and the power screw passes through the through hole.

[0033] As a preferred technical solution of the present application, two guide grooves are provided on the sleeve, and a guide box is fixedly connected to the two guide grooves.

[0034] The working principle and beneficial effects of the utility model are:

[0035] 1. In the utility model, the cooperation between the driving mechanism and the expansion mechanism facilitates the inclined expansion of the inner diameter of the hole and the expansion of the sleeve, so that the sleeve is stuck in the inclined expanded hole.

[0036] 2. In the utility model, the support mechanism is provided to facilitate the support of the expanded sleeve, thereby improving the stability of the fixation.

[0037] 3. In the utility model, the coordination among the bolt rod, sleeve, expansion mechanism, driving mechanism and supporting mechanism facilitates further expansion of the hole when the sleeve is inserted into the hole, thereby improving the stability of the fixation and effectively preventing the sleeve from slipping out of the hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0039] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0040] Figure 2 It is a structural schematic diagram of the utility model from another angle;

[0041] Figure 3 It is a schematic diagram of the structure of the utility model in cross section;

[0042] Figure 4 It is a structural schematic diagram of the support mechanism of the utility model.

[0043] In the figure: 1. bolt rod; 2. sleeve; 3. expansion ring; 4. wedge block; 5. reaming knife; 6. bolt; 7. fixing plate; 8. nut; 9. support plate; 10. support block; 11. transmission rod; 12. connecting plate; 13. power screw; 14. power block; 15. limit plate; 16. slide rod; 17. guide box. DETAILED DESCRIPTION

[0044] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] like Figure 1~Figure 4 As shown, this embodiment proposes a rear-expanded bottom anchor bolt, including: a bolt rod 1, a sleeve 2, an expansion mechanism, a driving mechanism and a supporting mechanism. Two guide grooves are provided on the sleeve 2, and a guide box 17 is fixedly connected to the two guide grooves. A sliding rod 16 is fixedly connected inside the sleeve 2. The sliding rod 16 is slidably set in the sliding groove provided on the bolt rod 1. A through hole is provided on the sliding rod 16, and a power screw 13 passes through the through hole. A sliding groove and a sliding hole are provided on the bolt rod 1, and the sleeve 2 is sleeved on the bolt rod 1. A plurality of separation grooves are provided on the sleeve 2. Through the cooperation between the bolt rod 1, the sleeve 2, the expansion mechanism, the driving mechanism and the supporting mechanism, it is convenient to further expand the hole when the sleeve 2 is inserted into the hole, thereby improving the stability of the fixation and effectively preventing the sleeve 2 from slipping out of the hole.

[0046] Among them, the expansion mechanism is arranged on the bolt rod 1, and is used for expanding the sleeve 2. The expansion mechanism includes: an expansion ring 3, a wedge block 4 and a reaming knife 5. Two limit plates 15 are fixedly connected in the sleeve 2. The two limit plates 15 are provided with limit grooves connected with the slide grooves provided on the sleeve 2. The two reaming knives 5 are respectively slidably arranged in the two limit grooves. The expansion ring 3 is fixedly connected to the bolt rod 1 and is connected with the slide hole. There are multiple wedge blocks 4, and the multiple wedge blocks 4 are fixedly connected to the expansion ring 3. There are two reaming knives 5. Two slide grooves are provided on the sleeve 2. The two reaming knives 5 are respectively slidably arranged in the two slide grooves. The opposite ends of the two reaming knives 5 are respectively in contact with the corresponding two wedge blocks 4. The driving mechanism is arranged on the bolt rod 1, and is used for driving the bolt rod 1 to move. The driving mechanism includes: a bolt 6, a fixing plate 7 and a nut 8. The bolt 6 The bolt 6 is fixedly connected to the bolt rod 1, and the fixing plate 7 is fixedly connected to the sleeve 2. A through hole is opened on the fixing plate 7, and the bolt 6 is arranged in the through hole. The nut 8 is threadedly connected to the bolt 6. Specifically, the operator rotates the nut 8 to rotate on the bolt 6, thereby driving the sleeve 2 to move on the bolt rod 1, and through the support of the wedge block 4, one end of the sleeve 2 is expanded. During the expansion process of one end of the sleeve 2, the wedge block 4 pushes the reaming knife 5 out of the slide groove, so that the reaming knife 5 contacts the inner wall of the hole. Then, the operator rotates the bolt 6 to drive the bolt rod 1 to rotate. When the bolt rod 1 rotates, the sliding rod 16 fixed in the sleeve 2 is in the slide groove opened on the bolt rod 1, thereby driving the sleeve 2, the expansion ring 3 and the wedge block 4 to rotate, thereby expanding the inner wall of the hole while expanding one end of the sleeve 2 to be pushed into the newly expanded hole.

[0047] Among them, the supporting mechanism is arranged on the bolt rod 1, which is used to support the sleeve 2. The supporting mechanism includes: a supporting plate 9, a supporting block 10, a transmission assembly and a power assembly. There are multiple supporting plates 9, and multiple rotating grooves are opened on the expansion ring 3. Multiple supporting plates 9 are respectively rotatably arranged in multiple rotating grooves. There are multiple supporting blocks 10, and multiple supporting blocks 10 are respectively rotatably connected to multiple supporting plates 9. The transmission assembly is arranged in the expansion ring 3 for driving the supporting plate 9 to swing. The power assembly is arranged in the bolt rod 1 for driving the transmission assembly to move. The transmission assembly includes: a transmission rod 11 and a connecting plate 12. There are multiple transmission rods 11, and multiple transmission rods 11 are respectively rotated. Connected to multiple support plates 9, the connecting plate 12 is rotatably connected between multiple transmission rods 11, and the power component includes: a power screw 13 and a power block 14. The power screw 13 is rotatably set on the connecting plate 12, and a screw hole is opened on the bolt 6. The power screw 13 is threadedly connected in the screw hole, and the power block 14 is fixedly connected to the power screw 13. Specifically, the power screw 13 is driven by the operator to rotate in the screw hole, thereby driving the connecting plate 12 to move. When the connecting plate 12 moves, it drives the transmission rod 11 to move. When the transmission rod 11 moves, it supports the support plate 9, thereby driving the support block 10 to support the inner wall of the sleeve 2, thereby supporting the sleeve 2.

[0048] In this embodiment, in order to prevent the rear bottom anchor bolt from falling off in the hole, the operator rotates the nut 8 on the bolt 6, thereby driving the sleeve 2 to move on the bolt rod 1, and through the support of the wedge block 4, one end of the sleeve 2 is expanded. During the expansion process of one end of the sleeve 2, the wedge block 4 pushes the reaming knife 5 out of the slide groove, so that the reaming knife 5 contacts the inner wall of the hole, and then the operator rotates the bolt 6 to drive the bolt rod 1 to rotate. When the bolt rod 1 rotates, the sliding rod 16 fixed in the sleeve 2 opens on the bolt rod 1. The sliding groove is designed to drive the sleeve 2, the expansion ring 3 and the wedge block 4 to rotate, so that the inner wall of the hole is expanded, and one end of the sleeve 2 can be expanded and pushed into the newly expanded hole. Then, the operator rotates the power screw 13 to rotate in the screw hole, thereby driving the connecting plate 12 to move. When the connecting plate 12 moves, it drives the transmission rod 11 to move. When the transmission rod 11 moves, it supports the support plate 9, thereby driving the support block 10 to press against the inner wall of the sleeve 2, thereby supporting the sleeve 2.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rear bottom expansion anchor bolt, characterized in that: include: A bolt rod (1), wherein the bolt rod (1) is provided with a slide groove and a slide hole; A sleeve (2), the sleeve (2) being sleeved on the bolt rod (1), and the sleeve (2) being provided with a plurality of separation grooves; an expansion mechanism, the expansion mechanism being arranged on the bolt rod (1) and being used to expand the sleeve (2); a driving mechanism, the driving mechanism being arranged on the bolt rod (1) and being used for driving the bolt rod (1) to move; A supporting mechanism, wherein the supporting mechanism is arranged on the bolt rod (1) and is used to support the sleeve (2).

2. A rear bottom anchor bolt according to claim 1, characterized in that: The expansion mechanism comprises: An expansion ring (3), the expansion ring (3) being fixedly connected to the bolt rod (1) and communicating with the sliding hole; A wedge block (4), wherein a plurality of the wedge blocks (4) are provided, and the plurality of the wedge blocks (4) are all fixedly connected to the expansion ring (3); A reaming knife (5), wherein two reaming knives (5) are provided, and two slide grooves are provided on the sleeve (2). The two reaming knives (5) are respectively slidably arranged in the two slide grooves, and opposite ends of the two reaming knives (5) are respectively in contact with the corresponding two wedge blocks (4).

3. A rear bottom anchor bolt according to claim 2, characterized in that: The driving mechanism comprises: A bolt (6), wherein the bolt (6) is fixedly connected to the bolt rod (1); a fixing plate (7), the fixing plate (7) being fixedly connected to the sleeve (2), the fixing plate (7) being provided with a through hole, and the bolt (6) being arranged in the through hole; A nut (8), wherein the nut (8) is threadedly connected to the bolt (6).

4. A rear bottom anchor bolt according to claim 3, characterized in that: The supporting mechanism comprises: A support plate (9), wherein a plurality of the support plates (9) are provided, a plurality of rotation grooves are provided on the expansion ring (3), and the plurality of support plates (9) are rotatably disposed in the plurality of rotation grooves respectively; A support block (10), wherein a plurality of the support blocks (10) are provided, and the plurality of the support blocks (10) are rotatably connected to the plurality of the support plates (9) respectively; a transmission assembly, the transmission assembly being arranged in the expansion ring (3) and being used for driving the support plate (9) to swing; A power assembly is arranged in the bolt rod (1) and is used to drive the transmission assembly to move.

5. The rear bottom anchor bolt according to claim 4, characterized in that: The transmission assembly comprises: a transmission rod (11), wherein a plurality of the transmission rods (11) are provided, and the plurality of transmission rods (11) are rotatably connected to the plurality of support plates (9) respectively; A connecting plate (12), wherein the connecting plate (12) is rotatably connected between the plurality of transmission rods (11).

6. The rear bottom anchor bolt according to claim 5, characterized in that: The power assembly comprises: A power screw rod (13), the power screw rod (13) being rotatably disposed on the connecting plate (12), the bolt (6) being provided with a screw hole, the power screw rod (13) being threadedly connected in the screw hole; A power block (14), wherein the power block (14) is fixedly connected to the power screw rod (13).

7. The rear bottom anchor bolt according to claim 6, characterized in that: Two limit plates (15) are fixedly connected inside the sleeve (2), and the two limit plates (15) are each provided with a limit groove connected to a slide groove provided on the sleeve (2), and the two reaming knives (5) are respectively slidably arranged in the two limit grooves.

8. The rear bottom anchor bolt according to claim 7, characterized in that: A sliding rod (16) is fixedly connected inside the sleeve (2), and the sliding rod (16) is slidably arranged in a sliding groove provided on the bolt rod (1).

9. The rear bottom anchor bolt according to claim 8, characterized in that: The sliding rod (16) is provided with a through hole, and the power screw rod (13) passes through the through hole.

10. The rear bottom anchor bolt according to claim 9, characterized in that: The sleeve (2) is provided with two guide grooves, and a guide box (17) is fixedly connected to both guide grooves.

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