Shell expansion piece and anchor bolt shell expansion head having the shell expansion piece

Abstract

The present invention relates to an expansion piece and an anchor rod expansion head having the expansion piece, the expansion piece comprising: an expansion piece, an expansion piece and a plurality of elastic elements, the expansion piece being connected to the end of the expansion piece and being rotatable relative to the expansion piece; one end of the elastic element being connected to the end of the expansion piece facing the expansion piece, and the other end being connected to the expansion piece, for pushing the expansion piece to rotate toward the anchor hole wall and making the expansion piece away from one end of the expansion piece close to the anchor hole wall. The technical solution of the present invention is to install a rotatable expansion piece and an elastic element at the end of the expansion piece, and then when the inner wedge of the expansion piece moves toward the opening direction of the anchor hole, the elastic element pushes the expansion piece to rotate toward the anchor hole wall and makes the end of the expansion piece close to the anchor hole wall, so as to prevent the inner wedge of the expansion piece from driving the expansion piece to move in the same direction, which can effectively improve its anchoring performance and has good applicability.

Description

Technical Field

[0001] The invention relates to the technical field of geotechnical engineering anchoring and supporting, in particular to an expansion shell piece and an anchor rod expansion shell head having the expansion shell piece. Background Art

[0002] The existing support equipment includes an anchor rod, and an expansion head is installed at the end of the anchor rod. The expansion head generally includes an expansion piece and an expansion inner wedge. During the anchoring process, the end of the anchor rod equipped with the expansion head needs to be inserted into the anchor hole, and then the user pulls the anchor rod toward the opening of the anchor hole to expand the expansion piece, so that the expansion head can be pressed against the wall of the anchor hole. However, when the anchor rod drives the expansion inner wedge to move toward the opening of the anchor hole, the expansion piece is likely to move toward the opening of the anchor hole at the same time as the expansion inner wedge, resulting in poor anchoring performance. In severe cases, the anchor rod equipped with the expansion head cannot achieve the anchoring effect. Summary of the invention

[0003] The purpose of the present invention is to provide a novel shell expansion piece, which can always press against the anchor hole wall when the inner wedge of the shell expands moves toward the anchor hole opening to avoid the shell expansion piece moving in the same direction as the inner wedge of the shell expands, and has good applicability.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A shell expansion piece includes an expansion piece, an expansion piece and a plurality of elastic elements, wherein the expansion piece is connected to the end of the expansion piece and can rotate relative to the expansion piece; one end of the elastic element is connected to the end of the expansion piece facing the expansion piece, and the other end is connected to the expansion piece, and is used to push the expansion piece to rotate toward the anchor hole wall and make the expansion piece away from the end of the expansion piece press against the anchor hole wall.

[0006] Furthermore, the expansion member is connected to the expansion piece via a pin shaft, and the expansion member can rotate relative to the pin shaft.

[0007] Furthermore, notches are formed on both sides of the end of the expansion piece facing the expansion piece, and a first recess is formed at one end of the expansion piece facing the expansion piece, and the end shape of the first recess is adapted to the notch; the pin shaft is rotatably inserted into the expansion piece, and the two ends of the pin shaft extend out to each of the notches respectively, and the two ends of the pin shaft are inserted into the two ends of the first recess in a one-to-one correspondence.

[0008] Further, a protrusion is formed on the end of the expansion piece facing the expansion piece, a second recess is formed on one end of the expansion piece facing the expansion piece, and the protrusion extends into the second recess.

[0009] Furthermore, the elastic element is a spring, one end of which is connected to the end of the expansion piece facing the expansion piece, and the other end of which is connected to the expansion piece.

[0010] Furthermore, a plurality of expansion teeth are formed on a side of the expansion piece facing away from the elastic element, and the tooth openings of the expansion teeth face the expansion piece.

[0011] An anchor bolt expansion head comprises any one of the expansion pieces described above.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The above technical solution provides an expansion piece and an anchor rod expansion head having the expansion piece, which is achieved by installing a rotatable expansion piece and an elastic element at the end of the expansion piece. When the inner wedge of the expansion shell moves toward the opening of the anchor hole, the elastic element pushes the expansion piece to rotate toward the wall of the anchor hole and makes the end of the expansion piece press against the wall of the anchor hole, so as to prevent the inner wedge of the expansion shell from driving the expansion piece to move in the same direction, thereby effectively improving its anchoring performance and having good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a schematic diagram of an anchor bolt expansion head including an expansion sheet in one embodiment of the present invention.

[0015] Figure 2 for Figure 1 A schematic diagram of the anchor bolt expansion head from another perspective is shown.

[0016] Figure 3 for Figure 1 A schematic diagram of the anchor bolt expansion head from another perspective is shown.

[0017] Figure 4 for Figure 1 A schematic diagram of the anchor bolt expansion head from another perspective is shown.

[0018] Figure 5 for Figure 3 Schematic diagram of area A is shown.

[0019] 100. Anchor rod expansion head; 10. Inner wedge of expansion shell; 11. Longitudinal opening; 12. First inclined surface; 13. Narrow end; 14. Wide end; 15. Mounting hole; 16. Hollow rod; 20. Expansion piece; 21. Expansion piece; 211. Clamping part; 212. Second inclined surface; 213. Notch; 214. Protrusion; 215. Expansion tooth; 22. Expansion piece; 221. First notch; 222. Second notch; 23. Elastic element or spring; 24. Pin. DETAILED DESCRIPTION

[0020] The present invention will be described in more detail below in conjunction with the accompanying drawings. It should be noted that the description of the present invention with reference to the accompanying drawings is only illustrative and not restrictive. The various embodiments can be combined with each other to form other embodiments not shown in the following description.

[0021] See also Figure 1 The technical solution of the present invention provides a new type of anchor rod expansion head 100, which can be abutted and matched with the wall of the anchor hole (not shown), has good pull-out resistance, and has good anchoring performance.

[0022] The anchor bolt shell expansion head 100 comprises: an expansion shell inner wedge 10 and at least three expansion shell sheets 20, each expansion shell sheet 20 is circumferentially installed on the outer side of the expansion shell inner wedge 10, each expansion shell sheet 20 is arranged at intervals, and the expansion shell sheet 20 can slide longitudinally relative to the expansion shell inner wedge 10. It can be understood that after the technician sends the anchor bolt shell expansion head 100 into the anchor hole, the expansion shell inner wedge 10 can be pulled to move in the direction of the anchor hole opening, that is, the expansion shell inner wedge 10 moves along its longitudinal direction to expand the expansion shell sheet 20 located outside the expansion shell inner wedge 10, and then the expansion shell sheet 20 is pressed against the anchor hole wall to achieve the anchoring effect; in addition, at least three expansion shell sheets 20 are distributed circumferentially on the outer side of the expansion shell inner wedge 10, which can effectively increase the contact area between the anchor bolt shell expansion head 100 and the anchor hole wall when it expands, and further improve the anchoring performance of the anchor bolt shell expansion head 100.

[0023] Among them, the inner wedge 10 of the expanding shell is set in a conical shape; in addition, when using the anchor rod expanding shell head 100 for anchoring, the narrow end 13 of the inner wedge 10 of the expanding shell is away from the bottom of the anchor hole, and the wide end 14 of the inner wedge 10 of the expanding shell is toward the bottom of the anchor hole.

[0024] Among them, the expansion piece 20 includes: an expansion piece 21, an expansion piece 22 and a plurality of elastic elements 23. The expansion piece 21 is connected to the expansion piece 22, and the expansion piece 22 can rotate relative to the expansion piece 21, that is, the expansion piece 22 rotates with one end connected to the expansion piece 21 as the axis; one end of the elastic element 23 is connected to the side of the expansion piece 21 facing the expansion piece 22, and the other end is connected to the expansion piece 22, and the elastic element 23 is located on the side of the expansion piece 22 facing the expansion shell inner wedge 10, and the elastic element 23 is used to push the expansion piece 22 to rotate toward the anchor hole wall, so that the end of the expansion piece 22 away from the expansion piece 21 is pressed against the anchor hole wall.

[0025] It can be understood that when the anchor rod expansion head 100 is sent into the anchor hole, the anchor hole wall presses against the expansion piece 22 to put the elastic element 23 in a compressed state; when the anchor rod expansion head 100 is sent into the anchor hole, the elastic element 23 will return from the compressed state to the relaxed state, and push the expansion piece 22 to rotate toward the anchor hole wall, so that the end of the expansion piece 22 away from the expansion piece 21 is in contact with the anchor hole wall; when the expansion shell inner wedge 10 is pulled to move longitudinally toward the anchor hole opening direction, the wide end 14 of the expansion shell inner wedge 10 gradually moves to the expansion piece 22, so that each expansion piece 21 expands and presses against the anchor hole wall, that is, an anchoring force is formed between the expansion piece 21 and the anchor hole wall.

[0026] It can be understood that during the expansion process of the expanding piece 21, one end of the expansion piece 22 away from the expanding piece 21 is always pressed against the wall of the anchor hole, and the other end is abutted against the expanding piece 21, thereby preventing the expanding shell inner wedge 10 from driving the expanding piece 21 to move in the same direction when the expanding shell inner wedge 10 moves toward the anchor hole opening direction, thereby avoiding the problem that the anchor rod expanding shell head 100 cannot achieve the anchoring effect.

[0027] Please also read Figure 2 The expansion piece 21 is provided with a clamping portion 211 on one side facing the expansion shell inner wedge 10, and the clamping portion 211 is arranged in a T-shape; the expansion shell inner wedge 10 is provided with a longitudinal opening 11 on one side facing the expansion piece 21, and the longitudinal opening 11 is arranged along the longitudinal direction of the expansion shell inner wedge 10, that is, the outer side surface of the expansion shell inner wedge 10 is provided with the same number of longitudinal openings 11 as the expansion piece 21, and the length direction of the longitudinal opening 11 is the same as the length direction of the expansion shell inner wedge 10. The clamping portion 211 is clamped on the longitudinal opening 11, that is, the end of the clamping portion 211 away from the expansion piece 21 passes through the longitudinal opening 11 and abuts against the inner side surface of the expansion shell inner wedge 10, so that the expansion piece 21 is limited on the expansion shell inner wedge 10 through the clamping cooperation between the clamping portion 211 and the longitudinal opening 11. In addition, the expansion piece 21 can move along the length direction of the longitudinal opening 11.

[0028] Please also read Figure 3 and Figure 4 A first inclined surface 12 is formed on the outer side of the inner wedge 10 of the expansion shell, and the number of the first inclined surfaces 12 is the same as the number of the expansion piece 21; a second inclined surface 212 is formed on the side of the expansion piece 21 facing the first inclined surface 12, and the second inclined surface 212 is slidably matched with the first inclined surface 12, that is, in the process that the wide end 14 of the inner wedge 10 of the expansion shell gradually moves to the expansion piece 22, the first inclined surface 12 and the second inclined surface 212 are in contact and gradually move toward the opening direction of the anchor hole, and at the same time, the first inclined surface 12 gradually moves away from the end of the second inclined surface 212 facing away from the expansion piece 22. In addition, the longitudinal opening 11 is opened at the first inclined surface 12, and the clamping portion 211 is formed at the second inclined surface 212 and faces the first inclined surface 12.

[0029] The expansion member 22 is connected to the expansion piece 21 through a pin 24, and the expansion member 22 can rotate relative to the pin 24. It can be understood that the pin 24 is transversely arranged at one end of the expansion piece 21 close to the expansion member 22, and the pin 24 can rotate relative to the expansion piece 21, and the pin 24 is connected to the expansion member 22, and the expansion member 22 can rotate around the pin 24 as the axis under the push of the elastic element 23.

[0030] A plurality of expansion teeth 215 are formed on the side of the expansion piece 21 facing away from the elastic element 23, the tooth openings of the expansion teeth 215 face the expansion piece 22, and the expansion teeth 215 are arranged in an arc shape on the expansion piece 21. When the expansion piece 21 expands, the expansion teeth 215 will press against the wall of the anchor hole, thereby increasing the anchoring force between the expansion piece 21 and the wall of the anchor hole, which can effectively improve the anchoring performance of the anchor rod expansion shell head 100.

[0031] It can be understood that, in addition to being provided with the expansion teeth 215, the outer side surface of the expansion piece 21 in the above embodiment may also be a smooth surface.

[0032] Please also read Figure 5 , notches 213 are formed on both sides of the end of the expansion piece 21 facing the expansion piece 22, and a first notch 221 is formed at one end of the expansion piece 22 facing the expansion piece 21, and the end shape of the first notch 221 is adapted to the notch 213, and the two side ends of the first notch 221 can be inserted into the notches 213 at both ends of the expansion piece 21; the pin shaft 24 is rotatably penetrated at one end of the expansion piece 21 facing the expansion piece 22, and the two ends of the pin shaft 24 are located outside the expansion piece 21 and at the notch 213, and the two ends of the pin shaft 24 are correspondingly penetrated at the two ends of the first notch 221, so that the expansion piece 22 can rotate around the pin shaft 24 under the push of the elastic element 23, and the end of the expansion piece 22 away from the expansion piece 21 is pressed against the anchor hole wall.

[0033] In addition, a protrusion 214 is formed at the end of the expansion piece 21 facing the expansion piece 22, and a second recess 222 is formed at one end of the expansion piece 22 facing the expansion piece 21. The protrusion 214 extends into the second recess 222. The second recess 222 is located at the bottom surface of the first recess 221.

[0034] The elastic element 23 is a spring 23 , one end of which is connected to the end of the expansion piece 21 facing the expansion piece 22 , and the other end is connected to the expansion piece 22 , and the spring 23 is located on the side of the expansion piece 22 facing the inner wedge 10 of the expansion shell.

[0035] It can be understood that, in the above embodiment, the elastic element 23 may be a component with deformation performance such as an elastic rod in addition to the spring 23; in addition, the spring 23 may be a straight spring or a torsion spring.

[0036] The inner wedge 10 of the expansion shell is provided with a mounting hole 15 along the longitudinal direction, and the inner wedge 10 of the expansion shell is connected to the anchor rod (not shown) through the mounting hole 15 .

[0037] It can be understood that an internal thread (not shown in the figure) is formed on the side wall of the mounting hole 15, and an external thread is formed on the anchor rod, and then the external thread at the anchor rod is screwed with the internal thread on the inner wall of the mounting hole 15, so that the anchor rod and the inner wedge 10 of the expansion shell are integrated; or, an external thread (not shown in the figure) is formed on the side wall of the mounting hole 15, and an internal thread is formed on the anchor rod, and then the internal thread at the anchor rod is screwed with the external thread on the inner wall of the mounting hole 15, so that the anchor rod and the inner wedge 10 of the expansion shell are integrated.

[0038] A hollow rod 16 is installed at one end of the expansion shell inner wedge 10 close to the expansion piece 22 . The hollow rod 16 is connected to the mounting hole 15 , so that the anchor rod can pass through the hollow rod 16 and be screwed into the mounting hole 15 .

[0039] The anchoring process of the anchor bolt expansion head 100 provided in the above embodiment can be described in detail as follows:

[0040] The user screws the anchor rod to the mounting hole 15 of the expanding shell inner wedge 10, and sends the anchor rod expanding shell head 100 into the anchor hole so that the wide part of the expanding shell inner wedge 10 abuts against the bottom surface of the anchor hole; at the same time, under the push of the elastic element 23, one end of the expanding piece 22 abuts against the wall of the anchor hole, and the other end abuts against the expanding piece 21, so that the expanding piece 21 is fixed in the anchor hole; the user pulls the expanding shell inner wedge 10 toward the end away from the bottom surface of the anchor hole through the anchor rod, and the wide end 14 of the expanding shell inner wedge 10 gradually moves to the expanding piece 22, and at the same time, the expanding piece 21 gradually expands and abuts against the wall of the anchor hole, so that the anchor rod expanding shell head 100 is anchored to the anchor hole as an integrated structure.

[0041] The expansion piece 20 and the anchor rod expansion head 100 having the expansion piece 20 provided in the above-mentioned embodiment are achieved by installing a rotatable expansion piece 22 and an elastic element 23 at the end of the expansion piece 21, so that when the inner wedge 10 of the expansion shell moves toward the opening direction of the anchor hole, the elastic element 23 pushes the expansion piece 22 to rotate toward the wall of the anchor hole and makes the end of the expansion piece 22 press against the wall of the anchor hole, so as to prevent the inner wedge 10 of the expansion shell from driving the expansion piece 21 to move in the same direction, which can effectively improve its anchoring performance and has good applicability.

[0042] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A shell expansion sheet, characterized in that: The invention comprises an expansion piece (21), an expansion piece (22) and a plurality of elastic elements (23); the expansion piece (22) is connected to the end of the expansion piece (21) and can rotate relative to the expansion piece (21); one end of the elastic element (23) is connected to the end of the expansion piece (21) facing the expansion piece (22), and the other end is connected to the expansion piece (22) for pushing the expansion piece (22) to rotate toward the anchor hole wall and making the end of the expansion piece (22) away from the expansion piece (21) press against the anchor hole wall; The expansion member (22) is connected to the expansion piece (21) via a pin shaft (24), and the expansion member (22) can rotate relative to the pin shaft (24); Notches (213) are formed on both sides of the end of the expansion piece (21) facing the expansion piece (22); a first notch (221) is formed on one end of the expansion piece (22) facing the expansion piece (21); the end shape of the first notch (221) is adapted to the notch (213); the pin shaft (24) is rotatably inserted into the expansion piece (21), and the two ends of the pin shaft (24) extend out to the notches (213) respectively, and the two ends of the pin shaft (24) are inserted into the two ends of the first notch (221) in a one-to-one correspondence; A clamping portion (211) is formed on the side of the expansion piece (21) facing the expansion shell inner wedge (10), and a longitudinal opening (11) matching with the clamping portion is opened on the side of the expansion shell inner wedge (10) facing the expansion piece (21), and the longitudinal opening (11) is arranged along the longitudinal direction of the expansion shell inner wedge (10).

2. The shell expansion sheet according to claim 1, characterized in that: A protrusion (214) is formed at the end of the expansion piece (21) facing the expansion piece (22), and a second recess (222) is formed at one end of the expansion piece (22) facing the expansion piece (21), and the protrusion (214) extends into the second recess (222).

3. The shell expansion sheet according to claim 1, characterized in that: The elastic element (23) is a spring, one end of which is connected to the end of the expansion piece (21) facing the expansion piece (22), and the other end of which is connected to the expansion piece (22).

4. The shell expansion sheet according to claim 1, characterized in that: A plurality of expansion teeth (215) are formed on a side of the expansion piece (21) facing away from the elastic element (23), and the tooth openings of the expansion teeth (215) face toward the expansion piece (22).

5. An anchor bolt expansion head, characterized in that: It comprises the shell expansion sheet (20) as described in any one of claims 1 to 4.

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