Secondary fastening device for sunk screw

Abstract

The utility model relates to the technical field of building construction, in particular to a secondary fastening device for a sunk screw, which mainly comprises an outer barrel, an inertia rod, an end cap, a positioning sleeve and the like. The device is simple in structure, convenient to manufacture, assemble and maintain and low in cost and maintenance difficulty. An external power source is not needed, impact fastening of the hammer head on the sunk screw is achieved through energy storage and energy release of the force storage spring, operation is easy and convenient, and limitation of a power source and an air source is avoided. The position of the positioning sleeve can be flexibly adjusted, and applicability and operation precision are improved. And the force storage spring has energy supply and buffering effects, so that damage to surrounding objects and prefabricated wallboards can be reduced, and the service life of the device is prolonged. In addition, the device is small in size, light in weight, convenient to carry and particularly suitable for secondary fastening of the sunk screw in a narrow space or a high-place operation scene.

Description

TECHNICAL FIELD

[0001] The utility model relates to building construction technical field, more particularly, relate to a countersunk screw secondary fastening device. BACKGROUND

[0002] Wooden board type prefabricated wallboard is widely used in prefabricated buildings. From the development of buildings, prefabricated buildings pursue efficient construction, wooden board type prefabricated wallboard can quickly build walls, roofs and floor slabs, meet the structural requirements. Under the background of functional requirements, it can provide heat preservation, sound insulation, noise reduction and certain fireproof performance. In terms of decoration, its surface can be decorated in various ways and customized to meet different styles. From the environmental protection point of view, wood is a renewable resource, in line with the concept of sustainable development, which helps buildings to obtain green certification. This is also an important driving factor for the application of wooden board type prefabricated wallboard under the background of environmental protection trend of prefabricated buildings.

[0003] Prefabricated wallboard can be installed quickly by nailing, gluing or self-tapping screw fixing. In order to ensure the beauty and stability of prefabricated wallboard installation, the head of the screw should be avoided as much as possible during installation. After the prefabricated wallboard is fixed, the binding position needs to be detected, and the protruding screw needs to be reworked to ensure the installation state of the prefabricated wallboard. In some narrow gaps or corners, the existing binding equipment such as wooden hammer, hammer, nail gun is not convenient to use, therefore, it is necessary to put forward a kind of convenient secondary fastening device. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at solving one of the technical problems existing in the prior art. Therefore, the utility model provides a countersunk screw secondary fastening device, which is simple to operate, convenient to use and can quickly work on the screw protruding from the wallboard.

[0005] According to the utility model embodiment, a countersunk screw secondary fastening device comprises:

[0006] The outer cylinder is provided with openings at both ends, and one end of the outer cylinder is threadedly connected with an end cap. One end of the outer cylinder is threadedly connected with a positioning sleeve.

[0007] The inertia rod is coaxially arranged in the outer cylinder, one end of the inertia rod penetrates through the end cap and is exposed outside the outer cylinder, and the other end of the inertia rod is provided with a hammer head. The inertia rod is provided with a limiting baffle. A force storage spring is sleeved on the inertia rod, one end of the force storage spring abuts against the limiting baffle, and the other end of the force storage spring abuts against the end cap. In the normal state, the hammer head is exposed at the outer end of the positioning sleeve. In the force storage state, the hammer head can be axially accommodated in the outer cylinder.

[0008] According to some embodiments of the utility model, the inertial rod is provided with a guide part and an elastic part, the shaft diameter of the guide part is larger than the shaft diameter of the elastic part; the guide part and the outer cylinder body adopt gap fit.

[0009] According to some embodiments of the utility model, the outer cylinder body is provided with a lubricating hole.

[0010] According to some embodiments of the utility model, the hammer head is a spherical structure.

[0011] According to some embodiments of the utility model, the hammer head is a cylindrical structure.

[0012] According to some embodiments of the utility model, the hammer head and the inertial rod are screw connected.

[0013] According to some embodiments of the utility model, the end of the inertial rod far from the hammer head is provided with a pull ring.

[0014] According to some embodiments of the utility model, a plurality of positioning clamping claws are circumferentially arranged on the positioning sleeve.

[0015] According to some embodiments of the utility model, the adjacent positioning clamping claws are hollowed out.

[0016] According to some embodiments of the utility model, an anti-skid sleeve is sleeved on the outer peripheral wall of the outer cylinder body.

[0017] According to some embodiments of the utility model, the sunken head screw secondary fastening device has at least the following beneficial effects:

[0018] According to the scheme of the utility model, the sunken head screw secondary fastening device comprises an outer cylinder body and an inertial rod; the two ends of the outer cylinder body are open, one end of the outer cylinder body is screw connected with an end cap, one end of the outer cylinder body is screw connected with a positioning sleeve, the inertial rod is coaxially arranged in the outer cylinder body, one end of the inertial rod passes through the end cap and is exposed outside the outer cylinder body, the other end of the inertial rod is provided with a hammer head, the inertial rod is provided with a limiting baffle, a force storage spring is sleeved on the inertial rod, one end of the force storage spring abuts against the limiting baffle, the other end of the force storage spring abuts against the end cap; in the normal state, the hammer head is exposed outside the end of the positioning sleeve; in the force storage state, the hammer head can be accommodated in the outer cylinder body along the axial direction. In work, the positioning sleeve is covered on the sunken head screw needing secondary fastening, and the hammer head abuts against the surface of the sunken head screw. When the secondary fastening operation of the sunken head screw is needed, the inertial rod is pushed to move away from the hammer head by external force, in the process, the inertial rod compresses the force storage spring, and the force storage spring stores elastic potential energy. When the appropriate force storage degree is reached, the external force on the inertial rod is released, at this time, the force storage spring releases the elastic potential energy, pushes the inertial rod to move reversely quickly, makes one end with the hammer head impact the sunken head screw quickly, and realizes the secondary fastening of the screw.

[0019] According to the scheme of the utility model, the device is mainly composed of an outer cylinder, an inertia rod, an end cap, a positioning sleeve and the like components, has no complex mechanical structure, is convenient to manufacture, assemble and maintain, and reduces production cost and maintenance difficulty. No external power source such as electricity, gas and the like is needed, and only energy storage and release of the force storage spring are relied on to realize impact fastening of the hammer head on the countersunk head screw, the operation process is simple and direct, the device can be conveniently used at various construction sites, and is not limited by conditions such as power supply and gas supply.

[0020] According to the scheme of the utility model, the positioning sleeve cover is arranged at the position needing secondary fastening, the position of the positioning sleeve can be adjusted according to actual needs, so that secondary fastening operation is accurately performed on the countersunk head screw at different positions, and the applicability and operation precision of the device are improved. The force storage spring not only plays a role in providing impact energy, but also plays a buffering role to a certain extent. When the hammer head impacts the countersunk head screw, the spring can absorb part of the impact force, reduces damage to surrounding objects and prefabricated wallboards, and also helps to prolong the service life of the device itself. The device has small overall volume and light weight, is convenient for construction personnel to carry to different work sites, and is especially suitable for secondary fastening of the countersunk head screw in scenes such as narrow space or high-altitude operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of the utility model;

[0022] Figure 2 It is a sectional view structural schematic view of the utility model;

[0023] Figure 3 It is a structural schematic view of the utility model; Figure 2 It is a local structure enlarged schematic view of the A place of the utility model;

[0024] Figure 4 It is a structural schematic view of the inertia rod of the spherical structure of the utility model;

[0025] Figure 5 It is an explosion structural schematic view of the inertia rod of the cylindrical structure of the utility model.

[0026] In the drawing:

[0027] 100-outer cylinder, 101-lubrication hole, 110-end cap, 120-positioning sleeve, 121-positioning claw, 130-anti-skid sleeve;

[0028] 200-inertia rod, 201-limiting baffle, 202-guiding portion, 203-elastic portion, 210-hammer head, 220-force storage spring, 230-pull ring. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0030] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0031] In the description of the present application, more than two means more than two. If there is a description of first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0032] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0033] Reference Figures 1 to 5The utility model discloses a countersunk screw secondary fastening device, countersunk screw secondary fastening device includes outer cylinder 100 and inertia rod 200. Among them, the both ends opening of outer cylinder 100 are arranged, and one end of outer cylinder 100 is connected with end cap 110 by screw thread, one end of outer cylinder 100 is connected with positioning sleeve 120 by screw thread, inertia rod 200 is coaxially arranged in outer cylinder 100, one end of inertia rod 200 passes through end cap 110 and exposes outside outer cylinder 100, the other end of inertia rod 200 is provided with hammer head 210, inertia rod 200 is provided with limit baffle 201, inertia rod 200 is provided with force storage spring 220, one end of force storage spring 220 abuts against limit baffle 201, the other end of force storage spring 220 abuts against end cap 110, in normal state, hammer head 210 exposes the outer end of positioning sleeve 120, in force storage state, hammer head 210 can be received in outer cylinder 100 along the axial direction. Specifically, in normal state, hammer head 210 exposes the outer end of positioning sleeve 120. When working, first, positioning sleeve 120 is accurately covered on the countersunk screw needing secondary fastening, so that hammer head 210 abuts against the surface of the countersunk screw, and the positioning preparation before operation is completed. When the countersunk screw needs to be secondary fastened, external force is applied to drive inertia rod 200 to move away from hammer head 210. Since inertia rod 200 is coaxially arranged in outer cylinder 100, and one end of outer cylinder 100 is connected with end cap 110 by screw thread, force storage spring 220 is compressed on inertia rod 200 during movement. One end of force storage spring 220 abuts against limit baffle 201, and the other end abuts against end cap 110. With the movement of inertia rod 200, force storage spring 220 is compressed, thereby storing elastic potential energy. When the force storage reaches a suitable degree, the external force on inertia rod 200 is removed. At this time, force storage spring 220, which stores elastic potential energy, starts to release energy, the spring restores deformation, and drives inertia rod 200 to move reversely, that is, to move towards hammer head 210. Inertia rod 200 drives hammer head 210 at the other end to impact the countersunk screw, and the secondary fastening of the countersunk screw is realized by the impact force of hammer head 210. The device mainly comprises outer cylinder 100, inertia rod 200, end cap 110, positioning sleeve 120 and other components, and does not have complex mechanical structure. The simple structure makes the manufacturing process relatively simple, and the device is easy to assemble, understand and operate, and is easy to maintain in later period, thereby effectively reducing production cost and maintenance difficulty. The device does not need external power, gas source and other power sources, and completely relies on force storage spring 220 to store and release energy to drive hammer head 210 to impact the countersunk screw. This feature makes the device free from dependence on external energy, and can be conveniently used wherever needed, thereby greatly improving the use flexibility and adaptability of the device. By covering positioning sleeve 120 on the position of the countersunk screw needing secondary fastening, and connecting positioning sleeve 120 with outer cylinder 100 by screw thread, the position of positioning sleeve 120 can be flexibly adjusted according to actual conditions.This makes the device can accurately to different position of countersunk head screw secondary fastening operation, significantly improve the applicability and operation precision of the device, ensure that in various complex working conditions can accurate operation. The force spring 220 has a dual role in the device. On the one hand, it provides the necessary impact energy for the hammer head 210 to impact the countersunk head screw; on the other hand, the spring can absorb part of the impact force at the moment of the hammer head 210 impacting the countersunk head screw. This not only reduces the damage to the surrounding objects and prefabricated wallboards, protects the construction environment and related materials, but also reduces the impact load on the device itself, helps to prolong the service life of the device and reduce equipment wear and tear costs. The device is small in overall size, light in weight, and convenient for construction personnel to carry to different work sites. Especially in narrow space or high place operation and other special scenes, its light and portable characteristics are more prominent, and the construction personnel can easily operate the countersunk head screw for secondary fastening, effectively improving the work efficiency and the convenience of construction.

[0034] In some embodiments of the present application, the inertia rod 200 is provided with a guide portion 202 and an elastic portion 203, the shaft diameter of the guide portion 202 is greater than the shaft diameter of the elastic portion 203; the guide portion 202 and the outer cylinder 100 are gap fitted. Specifically, in this embodiment, the inertia rod 200 is provided with a guide portion 202, and the shaft diameter of the guide portion 202 is greater than the shaft diameter of the elastic portion 203, and the guide portion 202 and the outer cylinder 100 are gap fitted. The design of this structure makes the inertia rod 200 move axially along the inner wall of the outer cylinder 100, and the guide portion 202 can play a guiding role, ensuring that the inertia rod 200 moves smoothly along the predetermined axis direction. The gap fit allows the inertia rod 200 to slide smoothly, and also limits its movement trajectory, preventing the inertia rod 200 from shifting or shaking during movement, ensuring that the hammer head 210 can accurately apply force in a straight line direction when impacting the countersunk head screw, improving the accuracy and stability of the impact, and thus improving the accuracy of the secondary fastening operation.

[0035] In some embodiments of the utility model, the outer cylinder 100 is provided with a lubricating hole 101. Specifically, in this embodiment, when the inertia rod 200 reciprocates along the inner wall of the outer cylinder 100, although the guide part 202 is matched with the outer cylinder 100 in clearance, long-term frequent sliding still produces friction. The existence of the lubricating hole 101 can inject lubricant, such as lubricating oil, etc.; the lubricant can be filled in the tiny gap between the inertia rod 200 and the inner wall of the outer cylinder 100, forming a layer of lubricating film. This layer of lubricating film can effectively reduce the friction between the two, reduce the degree of wear, make the sliding of the inertia rod 200 more smooth, reduce energy loss, and ensure the high efficiency of the device. Reducing friction also means reducing the wear rate of the inertia rod 200 and the inner wall of the outer cylinder 100. The heat and wear particles generated by friction can accelerate the aging and damage of the parts, and after injecting lubricant through the lubricating hole 101, these problems can be effectively alleviated. The service life of the inertia rod 200 and the outer cylinder 100 is prolonged, the frequency of device failure or performance decline caused by severe component wear is reduced, and the cost of replacing components or the entire device is reduced.

[0036] In some embodiments of the utility model, the hammer head 210 is a spherical structure. Specifically, in this embodiment, the spherical structure of the hammer head 210 can act on the screw head in a point contact manner when contacting with the countersunk screw. Compared with other shapes of hammer head 210, this point contact can concentrate power on a smaller contact area, so that the impact force is more effectively transmitted to the countersunk screw, which is conducive to overcoming the friction between the screw and the connecting piece and achieving more efficient fastening.

[0037] In some embodiments of the utility model, the hammer head 210 is a cylindrical structure. The cylindrical structure has a large axial size and a relatively regular shape. When impacting the countersunk screw, the center of gravity of the cylindrical hammer head 210 is relatively stable, and can maintain good straightness and directionality during the impact process. This makes the impact force more directly and stably transmitted to the countersunk screw, and compared with some irregularly shaped hammer heads 210, is less likely to deviate or shake at the moment of impact, thereby ensuring the accuracy and effectiveness of the secondary fastening of the countersunk screw. The end face of the cylinder provides a larger contact area than the spherical structure when contacting with the countersunk screw. This large-area contact can make the impact force more evenly distributed on the head of the countersunk screw, avoiding damage to the countersunk screw caused by excessive local pressure, especially for some countersunk screws with high surface quality requirements or soft material. At the same time, uniform pressure distribution helps to more comprehensively apply fastening force to the countersunk screw, improving the fastening effect.

[0038] In some embodiments of the utility model, the hammer head 210 and the inertia rod 200 are threadedly connected. Specifically, in this embodiment, during the assembly of the device, the construction personnel only need to screw the threaded end of the hammer head 210 with the corresponding threaded section of the inertia rod 200, and the connection of the two can be easily completed. This connection method does not require additional complex tools or special assembly process, and is simple and fast to operate. When the device is maintained, repaired or the hammer head 210 needs to be replaced due to wear, the hammer head 210 can also be easily disassembled through simple screwing operation, greatly improving the convenience of equipment maintenance and reducing maintenance cost.

[0039] In some embodiments of the utility model, the end of the inertia rod 200 away from the hammer head 210 is provided with a pull ring 230. Specifically, during operation, especially when repeatedly and quickly pulling the inertia rod 200 for impact operation, the hands may not be able to hold stably due to sweating, fatigue and other reasons. The pull ring 230 can provide an additional safety measure, even if the hands accidentally release the inertia rod 200, due to the presence of the pull ring 230, the operator can still control the inertia rod 200 by pulling the pull ring 230, to avoid accidents caused by out of control of the inertia rod 200, such as bruising the feet or damaging surrounding objects.

[0040] In some embodiments of the utility model, a plurality of positioning clamping jaws 121 are arranged circumferentially on the positioning sleeve 120. Specifically, in this embodiment, when the device is used to perform secondary fastening operation on the countersunk screw, the positioning clamping jaw 121 can accurately clamp the structure around the countersunk screw. The edge or specific contour of the position where the countersunk screw is located can be quickly found and fitted, to ensure that the positioning sleeve 120 is accurately aligned with the countersunk screw, so that the impact of the hammer head 210 on the countersunk screw is more accurate, and impact out of position or damage to the surrounding structure due to position deviation is avoided. After the positioning clamping jaw 121 tightly grips the surrounding structure, it can provide stable support for the entire device. During the process of the hammer head 210 impacting the countersunk screw to generate strong impact force, the positioning clamping jaw 121 can prevent the positioning sleeve 120 from shaking or shifting, to ensure the stability of the device during impact, so that the impact force can be effectively transmitted to the countersunk screw, to improve the fastening effect.

[0041] In some embodiments of the utility model, adjacent positioning clamping jaw 121 is formed between the hollow. Specifically, in this embodiment, the hollow structure significantly reduces the overall weight of the positioning sleeve 120. Under the premise of ensuring the basic function and structural strength of the positioning clamping jaw 121, part of the unnecessary material is removed, so that the whole device is more portable. For the tool that needs to be frequently handheld operation, reducing the weight can reduce the labor intensity of the operator, improve the comfort of long-time operation, especially in the high-altitude operation or the scene that needs long-time continuous operation, the advantage of light weight is more obvious. In addition, during the operation process, the operator can directly observe the contact condition of the positioning sleeve 120 inside and the countersunk screw through these hollow areas. For example, it can be clearly seen whether the clamping jaw accurately clamps the edge of the countersunk screw, whether there is a deviation or clamping not in place. This makes the operator can monitor the positioning state in real time during operation, and can adjust in time once the problem is found, to avoid the subsequent impact operation failure caused by inaccurate positioning.

[0042] In some embodiments of the utility model, the outer peripheral wall of the outer cylinder 100 is sleeved with an anti-skid sleeve 130. The anti-skid sleeve 130 is usually made of materials with high friction coefficient, such as rubber, etc. When the operator holds the outer cylinder 100 to carry out related operation, the anti-skid sleeve 130 can significantly increase the friction between the hands and the outer cylinder 100, effectively prevent the tool from falling out of control due to hand sliding during operation. Especially in some cases that need more force to operate or the operation environment is more complex, the anti-skid sleeve 130 can greatly improve the holding stability of the operator to the tool, reduce the risk of safety accidents.

[0043] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A countersunk head screw secondary fastening device, characterized in that, The utility model relates to a kind of inertial hammer, including: Outer cylinder (100), the both ends of the outer cylinder (100) are open, one end of the outer cylinder (100) and end cap (110) are threadedly connected;One end of the outer cylinder (100) and positioning sleeve (120) are threadedly connected; Inertial rod (200), the inertial rod (200) is coaxially arranged in the outer cylinder (100), one end of the inertial rod (200) is exposed outside the outer cylinder (100) by the end cap (110), the other end of the inertial rod (200) is provided with hammer head (210);The inertial rod (200) is provided with limit baffle (201);Spring (220) is sleeved on the inertial rod (200), one end of the spring (220) abuts against the limit baffle (201), the other end of the spring (220) abuts against the end cap (110);In normal state, the hammer head (210) is exposed to the outer end of the positioning sleeve (120);In force storage state, the hammer head (210) can be received in the outer cylinder (100) along the axial direction.

2. A countersunk screw secondary fastening device according to claim 1, characterised in that, The inertial rod (200) is provided with guide portion (202) and elastic part (203), the shaft diameter of the guide portion (202) is greater than the shaft diameter of the elastic part (203);The guide portion (202) and the outer cylinder (100) adopt clearance fit.

3. A countersunk screw secondary fastening device according to claim 2, wherein, The outer cylinder (100) is provided with lubricating hole (101).

4. A countersunk screw secondary fastening device according to claim 1, wherein, The hammer head (210) is spherical structure.

5. A countersunk screw secondary fastening device according to claim 1, wherein, The hammer head (210) is cylindrical structure.

6. A countersunk screw secondary fastening device according to claim 4 or 5, characterised in that, The hammer head (210) and inertial rod (200) are threadedly connected.

7. A countersunk screw secondary fastening device according to claim 6, wherein, The end of the inertial rod (200) away from the hammer head (210) is provided with pull ring (230).

8. A countersunk screw secondary fastening device according to claim 1, wherein, The positioning sleeve (120) is provided with a plurality of positioning claws (121) in the circumferential direction.

9. A countersunk screw secondary fastening device according to claim 8, wherein, The adjacent positioning claws (121) form hollow.

10. A countersunk screw secondary fastening device according to claim 1, wherein, The outer cylinder (100) is provided with anti-skid sleeve (130) on the outer circumferential wall.

Images