Adjustable prestressed anchorage device

Abstract

The utility model discloses an adjustable pre-stressed anchorage device, which relates to the field of anchorage devices and comprises an anchor sheet pad, an anchor plate is arranged at the front end of the anchor sheet pad, an extrusion pad is arranged between the anchor sheet pad and the anchor plate, a plurality of through grooves are arranged on the surface of the extrusion pad, the inner diameter of each through groove is larger than the aperture of the anchor plate, and the diameter of the through groove is larger than that of the anchor plate. A moving assembly is arranged between the anchor piece pad and the extrusion pad and used for controlling movement of the extrusion pad, the moving assembly comprises a plurality of threaded grooves, and the threaded grooves are formed in the surface of the extrusion pad. According to the adjustable pre-stressed anchorage device, the threaded rod and the threaded groove are arranged, and when the threaded rod rotates, the distance of one circle of rotation is only the thread pitch, so that the threaded rod with the smaller thread pitch can more precisely control the distance of the extrusion pad, and the situation that the pre-stress is damaged by adjusting the pre-stress is avoided; and the threaded rod is matched with the threaded groove, so that the self-locking function is achieved, additional equipment is not needed, and the use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of anchors, in particular to an adjustable prestressed anchor device. Background Art

[0002] Anchor refers to the permanent anchoring device used in prestressed concrete. It is an anchoring tool used in post-tensioned structures or components to maintain the tension of prestressed tendons and transfer it to the interior of the concrete. It is also called a prestressed anchor. During installation, a clip is placed in the hole of the anchor plate, and the steel strand is clamped by the clip. The steel strand is stretched by a jack to cause it to deform. During the rebound of the steel strand, the clip is driven into the interior of the anchor plate hole to fix the steel strand. After the prestressing is adjusted using the jack, the excess steel strand needs to be cut short. At this time, if the steel strand needs to be adjusted again, it needs to be replaced with a new one. The operation process is very cumbersome. Utility Model Content

[0003] The main purpose of the utility model is to provide an adjustable prestressed anchor device, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an adjustable prestressed anchor device, including an anchor pad, an anchor plate is arranged at the front end of the anchor pad, an extrusion pad is arranged between the anchor pad and the anchor plate, a plurality of through grooves are opened on the surface of the extrusion pad, the inner diameter of the through grooves is larger than the hole diameter of the anchor plate, and a moving component is arranged between the anchor pad and the extrusion pad for controlling the movement of the extrusion pad.

[0005] The moving component includes a plurality of thread grooves, which are opened on the surface of the extrusion pad and located between two adjacent through grooves. The thread groove is a non-through groove, and a rotatable threaded rod is installed inside the thread groove. One end of the threaded rod is movably installed inside the anchor pad.

[0006] A cavity is arranged inside the anchor pad, and a special gear with teeth inside and outside is movably installed inside the cavity. A connecting gear is fixedly installed on the surface of the threaded rod, and the connecting gear meshes with the inner side of the special gear. A groove is opened on the surface of the anchor pad, and the groove is connected with the inside of the cavity. A starting gear is installed at the position of the groove, and the starting gear meshes with the outer side of the special gear.

[0007] Part of the teeth of the starting gear are located inside the groove.

[0008] A plurality of penetrating transverse grooves are provided on the inner side of the starting gear.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] 1. In the utility model, by setting a threaded rod and a threaded groove, when the threaded rod rotates, the distance of one rotation is only the pitch. Therefore, the threaded rod with a smaller pitch can control the distance of the extrusion pad more accurately, avoiding the destruction of the prestress by adjusting the prestress. The cooperation between the threaded rod and the threaded groove has a self-locking function, does not require additional equipment, and reduces the cost of use.

[0011] 2. In the utility model, by setting the connecting gear, the special gear and the starting gear, the starting gear is first sleeved on the motor shaft. At this time, the motor shaft itself needs a convex block that cooperates with the transverse groove to ensure that the motor shaft can drive the starting gear to rotate. The starting gear drives the special gear to rotate, and the special gear drives all the connecting gears to rotate, thereby indirectly making the threaded rod rotate. It does not require multiple power sources to drive, and can make the movement of the extrusion pad more stable and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of an adjustable prestressed anchor device of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the thread groove position of an adjustable prestressed anchor device of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the threaded rod position of an adjustable prestressed anchor device of the utility model;

[0015] Figure 4 The utility model is a schematic diagram of the structure of the special gear position part of an adjustable prestressed anchor device.

[0016] In the figure: 1. anchor pad; 2. anchor plate; 3. extrusion pad; 4. through groove; 5. threaded groove; 6. threaded rod; 7. connecting gear; 8. groove; 9. starting gear; 10. transverse groove; 11. special gear. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] like Figure 1-4As shown, an adjustable prestressed anchor device includes an anchor pad 1. In this embodiment, the bottom of the anchor pad 1 is set as a plane, which can be against the plane of the mounting table. The front end of the anchor pad 1 is provided with an anchor plate 2. The anchor plate 2 is used with a clamp to fix the steel strand. An extrusion pad 3 is provided between the anchor pad 1 and the anchor plate 2. The extrusion pad 3 itself has a certain thickness. A plurality of through grooves 4 are opened on the surface of the extrusion pad 3 to allow the steel strand to pass through. The inner diameter of the through groove 4 is larger than the aperture of the anchor plate 2, which will not affect the stretching of the steel strand and can also protect the steel strand. A moving component is provided between the anchor pad 1 and the extrusion pad 3 for controlling the movement of the extrusion pad 3. After the steel strand is installed, it only needs to control the moving component to change the distance between the anchor pad 1 and the anchor plate 2 to adjust the prestress of the steel strand.

[0019] The movable component includes a plurality of thread grooves 5. In the present embodiment, the number of the thread grooves 5 is five and they are arranged in a circular array. The thread grooves 5 are opened on the surface of the extrusion pad 3 and are located between two adjacent through grooves 4, which will not affect the installation of the steel strand. The thread grooves 5 are non-through grooves, and a rotatable threaded rod 6 is installed inside the thread grooves 5. The number of the threaded rods 6 is the same as that of the thread grooves 5, and one end of the threaded rod 6 is movably installed inside the anchor pad 1.

[0020] Since there are multiple threaded rods 6, the extrusion pad 3 will not rotate with the threaded rod 6 when the threaded rod 6 rotates, and when the threaded rod 6 rotates, the distance of one circle is only the pitch. Therefore, the threaded rod 6 with a smaller pitch can more accurately control the distance of the extrusion pad 3, avoiding the destruction of the prestress itself by adjusting the prestress, and the cooperation between the threaded rod 6 and the thread groove 5 has a self-locking function, does not require additional equipment, and reduces the cost of use.

[0021] A cavity is arranged inside the anchor pad 1, and a special gear 11 with teeth inside and outside is movably installed inside the cavity. The surface of the special gear 11 just contacts the inner wall of the cavity to ensure that the special gear 11 can only rotate on its own. A connecting gear 7 is fixedly installed on the surface of the threaded rod 6, and the connecting gear 7 meshes with the inner side of the special gear 11. A groove 8 is provided on the surface of the anchor pad 1, and the groove 8 is connected to the inside of the cavity. A starting gear 9 is installed at the position of the groove 8, and the starting gear 9 meshes with the outer side of the special gear 11. Part of the teeth of the starting gear 9 are located inside the groove 8. Under normal conditions, the starting gear 9 is not installed inside the groove 8, and a plurality of penetrating transverse grooves 10 are provided on the inner side of the starting gear 9.

[0022] When the staff needs to adjust the stress, due to the high strength of the steel strand itself, it is almost impossible to pull it manually. At this time, a motor is needed to first sleeve the starting gear 9 on the motor shaft. At this time, the motor shaft itself needs a protrusion that cooperates with the transverse groove 10 to ensure that the motor shaft can drive the starting gear 9 to rotate. The starting gear 9 drives the special gear 11 to rotate, and the special gear 11 drives all the connecting gears 7 to rotate, thereby indirectly rotating the threaded rod 6. Since the special gear 11 and the connecting gear 7 are both located inside the cavity, the anchor pad 1 can protect its meshing structure to ensure smoother use.

[0023] It should be noted that the utility model is an adjustable prestressed anchor device. When in use, the starting gear 9 is first sleeved on the motor shaft. At this time, the motor shaft itself needs a protrusion that cooperates with the transverse groove 10 to ensure that the motor shaft can drive the starting gear 9 to rotate. The starting gear 9 drives the special gear 11 to rotate, and the special gear 11 drives all the connecting gears 7 to rotate, thereby indirectly rotating the threaded rod 6. Since a plurality of threaded rods 6 are provided, when the threaded rod 6 rotates, the extrusion pad 3 will not rotate with the threaded rod 6, and when the threaded rod 6 rotates, the distance of one circle of rotation is only the pitch. Therefore, the threaded rod 6 with a smaller pitch can more accurately control the distance of the extrusion pad 3, thereby avoiding the destruction of its own prestress by adjusting the prestress.

[0024] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An adjustable prestressed anchor device, comprising an anchor pad (1), wherein an anchor plate (2) is provided at the front end of the anchor pad (1), characterized in that: A compression pad (3) is arranged between the anchor pad (1) and the anchor plate (2); a plurality of through grooves (4) are provided on the surface of the compression pad (3); the inner diameter of the through groove (4) is larger than the hole diameter of the anchor plate (2); and a moving component is arranged between the anchor pad (1) and the compression pad (3) for controlling the movement of the compression pad (3).

2. The adjustable prestressed anchor device according to claim 1, characterized in that: The moving assembly comprises a plurality of thread grooves (5), the thread grooves (5) being formed on the surface of the extrusion pad (3) and being located between two adjacent through grooves (4), the thread grooves (5) being non-through grooves, a rotatable threaded rod (6) being installed inside the thread grooves (5), and one end of the threaded rod (6) being movably installed inside the anchor pad (1).

3. The adjustable prestressed anchor device according to claim 2, characterized in that: A cavity is arranged inside the anchor pad (1), and a special gear (11) having teeth inside and outside is movably installed inside the cavity. A connecting gear (7) is fixedly installed on the surface of the threaded rod (6), and the connecting gear (7) meshes with the inner side of the special gear (11). A groove (8) is provided on the surface of the anchor pad (1), and the groove (8) is communicated with the inside of the cavity. A starting gear (9) is installed at the position of the groove (8), and the starting gear (9) meshes with the outer side of the special gear (11).

4. The adjustable prestressed anchor device according to claim 3, characterized in that: Part of the teeth of the starting gear (9) are located inside the groove (8).

5. The adjustable prestressed anchor device according to claim 3, characterized in that: A plurality of penetrating transverse grooves (10) are formed on the inner side of the starting gear (9).

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