Anti-deformation double-end screw

Abstract

The utility model discloses an anti-deformation double-end screw which comprises a stud part, a non-rotary-column-shaped center hole is formed in the stud part, a core column matched with the center hole is connected into the center hole in a sliding mode, the height of the core column is smaller than that of the stud part, a side hole is formed in the side face of the stud part and is a threaded hole, and a set screw is connected into the side hole in a threaded mode. The axes of the side holes are arranged on the upper and lower symmetrical structural surfaces of the stud part; one end of the set screw is provided with a rotating part, the other end of the set screw is provided with a positioning bulge, and the side surface of the core column is provided with a first positioning groove and a second positioning groove which are matched with the positioning bulge. The position of the core column of the double-end screw can be changed, so that the position of the center hole used as a screwing hole can be switched, and the double-end use function of the screw is achieved; chamfered structures are arranged at the two ends of the stud part, so that pre-positioning can be performed before screwing, the overall function is complete, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, and more specifically, it relates to an anti-deformation double-headed screw. Background Art

[0002] During the screwing of screws with a relatively small diameter-height ratio, due to the obstruction at the screwing-in end, the screw rod is prone to deformation and bending, thereby affecting subsequent further screwing, and the overall effect is not good. Accordingly, the utility model proposes an anti-deformation double-headed screw. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the above deficiencies in the prior art and provide an anti-deformation double-headed screw, which has the characteristics of being used at both ends and not being easily deformed.

[0004] To solve the above technical problems, the purpose of the utility model is achieved as follows: An anti-deformation double-headed screw according to the utility model includes a stud portion extending axially. A non-rotary columnar central hole is provided in the stud portion. A core column that matches it is slidably connected in the central hole. The height of the core column is less than the height of the stud portion. A side hole is provided on the side surface of the stud portion. The side hole is a threaded hole. A set screw is threadedly connected in the side hole. The axis of the side hole is provided on the upper and lower symmetric structural planes of the stud portion.

[0005] The utility model is further provided as follows: One end of the set screw has a rotating portion, and the other end has a positioning protrusion. First and second positioning grooves that match the positioning protrusion are provided on the side surface of the core column;

[0006] When one end surface of the core column is flush with one end surface of the stud portion, the positioning protrusion is inserted into the first positioning groove;

[0007] When the other end surface of the core column is flush with the other end surface of the stud portion, the positioning protrusion is inserted into the second positioning groove.

[0008] The utility model is further provided as follows: Chamfer structures are provided at both ends of the stud portion.

[0009] The utility model is further provided as follows: The height of the core column is equal to three-fourths of the height of the stud portion.

[0010] The utility model is further provided as follows: The diameter-height ratio of the stud portion is 1:1.

[0011] The utility model is further provided as follows: The central hole is in the shape of a regular hexagonal prism.

[0012] In summary, the utility model has the following beneficial effects:

[0013] 1. The position of the core column is variable, enabling the position of the central hole used as the screw-threading hole to be switched, thus realizing the function of using both ends of the screw.

[0014] 2. Chamfer structures are provided at both ends of the stud portion, which can be used for pre-positioning before screw-threading.

[0015] 3. The diameter-to-height ratio of the stud portion is 1:1, resulting in an overall short and thick shape, strong torsional resistance, and not easily deformed during use. Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of the present utility model;

[0017] Figure 2 is the partial structural schematic diagram of the present utility model;

[0018] Figure 3 is the local structural schematic diagram of the present utility model. Detailed Embodiment

[0019] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the preferred implementation scheme of the present utility model will be described below in conjunction with specific embodiments. However, it should be understood that these descriptions are only for further explaining the features and advantages of the present utility model, rather than limiting the patent requirements of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.

[0020] The present utility model will be further described below in conjunction with the drawings and preferred embodiments.

[0021] Embodiment 1

[0022] Refer to Figures 1 to 3 As shown, a deformation-proof double-headed screw involved in this embodiment includes a stud portion 1 extending axially. A central hole 2 in the shape of a regular hexagonal prism is provided on the stud portion 1. A core column 3 that matches it is slidably connected in the central hole 2. The height of the core column 3 is less than the height of the stud portion 1. A side hole 4 is provided on the side surface of the stud portion 1. The side hole 4 is a threaded hole. A set screw 5 is threadedly connected in the side hole 4. The axis of the side hole 4 is provided on the upper and lower symmetric structural planes of the stud portion 1.

[0023] Further, one end of the set screw 5 has a rotating portion, and the other end has a positioning protrusion 51. First positioning grooves 31 and second positioning grooves 32 that match the positioning protrusion 51 are provided on the side surface of the core column 3;

[0024] When one end surface of the core column 3 is flush with one end surface of the stud portion 1, the positioning protrusion 51 is inserted into the first positioning groove 31;

[0025] When the other end face of the core column 3 is flush with the other end face of the stud portion 1, the positioning protrusion 51 is inserted into the second positioning groove 32.

[0026] Furthermore, the height of the core column 3 is equal to three-fourths of the height of the stud portion 1.

[0027] In this embodiment, first, the upper end face of the core column 3 is flush with the upper end face of the stud portion 1. At this time, the positioning protrusion 51 is inserted into the first positioning groove 31, and the rotation groove formed by the central hole 2 is located at the lower end of the stud portion 1. When it is necessary to switch to use the head, the set screw 5 can be loosened first until the positioning protrusion 51 disengages from the first positioning groove 31, then the position of the core column 3 can be changed in the central hole 2 until the side hole 4 is aligned with the second positioning groove 32, and finally the set screw 5 can be tightened until the positioning protrusion 51 extends into the second positioning groove 32 to complete the switching of the used end of the double-headed screw.

[0028] Among them, the set screw 5 is buried in the side hole 4 and does not interfere with the thread on the stud portion 1.

[0029] Embodiment 2

[0030] See Figures 1 to 3 As shown, a deformation-proof double-headed screw involved in this embodiment is further provided, on the basis of Embodiment 1, that both ends of the stud portion 1 are provided with a chamfer structure 6.

[0031] In this embodiment, by providing chamfer structures 6 at both ends of the stud portion 1, a pre-positioning function for the screw before screwing is achieved.

[0032] Embodiment 3

[0033] See Figures 1 to 3 As shown, a deformation-proof double-headed screw involved in this embodiment is further provided, on the basis of Embodiments 1 and 2, that the diameter-to-height ratio of the stud portion 1 is 1:1.

[0034] In this embodiment, by setting the diameter-to-height ratio of the stud portion 1 to 1:1, the double-headed screw is overall short and thick, has strong anti-torsion ability, and is not easily deformed.

[0035] The deformation-proof double-headed screw involved in the present utility model has a variable position of the core column, enabling the position of the central hole used as a screwing hole to be switched, realizing the double-end use function of the screw; chamfer structures are provided at both ends of the stud portion, which can be used for pre-positioning before screwing; and the diameter-to-height ratio of the stud portion is set to 1:1, resulting in an overall short and thick shape, strong anti-torsion ability, not easily deformed during use, with a complete overall function and strong practicability.

[0036] Unless otherwise specified, in this utility model, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction", etc., the orientation or positional relationship indicated is based on the actual orientation or positional relationship shown. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms used to describe the orientation or positional relationship in this utility model are only for exemplary illustration and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood in combination with the embodiments and according to the specific circumstances.

[0037] Unless otherwise clearly specified and defined, in this utility model, if there are terms such as "arranged", "connected" and "coupled", they shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0038] The preferred specific embodiments of this utility model have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of this utility model without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of this utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology shall fall within the protection scope determined by the claims.

Claims

1. An anti-deformation stud screw, comprising a stud portion extending in the axial direction, characterized in that: The stud part is provided with a center hole in the shape of a non-rotating column, a core column matching it is slidably connected in the center hole, the height of the core column is smaller than the height of the stud part, a side hole is provided on the side of the stud part, the side hole is a threaded hole, a set screw is threadedly connected in the side hole, and the axis of the side hole is arranged on the upper and lower symmetrical structural surfaces of the stud part.

2. The anti-deformation stud screw according to claim 1, characterized in that: One end of the set screw has a rotating portion and the other end has a positioning protrusion, and the side surface of the core column is provided with a first positioning groove and a second positioning groove matching the positioning protrusion; When one end surface of the core column is flush with one end surface of the stud portion, the positioning protrusion is inserted into the first positioning groove; When the other end surface of the core column is flush with the other end surface of the stud portion, the positioning protrusion is inserted into the second positioning groove.

3. The anti-deformation stud screw according to claim 1 or 2, characterized in that: Both ends of the stud portion have chamfered structures.

4. The anti-deformation stud screw according to claim 3, characterized in that: The height of the core column is equal to three quarters of the height of the stud portion.

5. The anti-deformation stud screw according to claim 1, characterized in that: The diameter-to-height ratio of the stud portion is 1:

1.

6. The anti-deformation stud screw according to claim 1, characterized in that: The central hole is in the shape of a regular hexagonal prism.

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