Anti-falling bolt

Abstract

The utility model relates to the technical field of mechanical parts, in particular to an anti-falling bolt which comprises a screw rod and a thread layer integrally formed on the outer wall of the screw rod, a bolt head is fixedly connected to the top end of the screw rod and comprises a head body and an insertion groove integrally formed in the top of the head body, and the insertion groove is fixedly connected with the screw rod. And a bonding device of which the bottom end penetrates through the head body is detachably inserted into the insertion groove in a sliding manner.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical parts technical field, concretely relates to a kind of anti-falling bolts. BACKGROUND

[0002] Bolt is a kind of mechanical connector, belongs to standardization fastener, is composed of head and screw rod (cylinder with external thread), usually needs to be used with nut, for connecting two parts with through hole, the screw rod of bolt is mostly cylindrical, plays the role of guide, is matched with hole to bear shear force, it is provided with thread on it, is responsible for cooperation with nut or threaded hole, the head of bolt is various, commonly known hexagonal head, round head, countersunk head etc., its role is to cooperate with tool (such as spanner) to exert reverse torque, ensure the fastening force of nut, and disperse stress when under tension, threaded hole or nut can be connected with workpiece quickly by bolt, it is convenient to use, and is widely used in various fields.

[0003] Although the above-mentioned prior art can solve the corresponding technical problems, there are still some defects: the existing bolt is hard connected with the threaded hole on the workpiece or the nut through the thread on the screw rod during use, and after a period of use, if the bolt is affected by a certain rotational torque, it is easy to cause the bolt to gradually loosen, and if it is not repaired in time, it is easy to produce the phenomenon of falling off, and the connection firmness is poor. UTILITY MODEL CONTENTS

[0004] The utility model is aimed at the defects and deficiencies of prior art, and provides an anti-falling bolt which is firm and not easy to loosen.

[0005] To achieve the above object, the utility model adopts the following technical scheme: an anti-falling bolt, comprising a screw rod and a thread layer integrally formed on the outer wall of the screw rod, the top end of the screw rod is fixedly connected with a bolt head, the bolt head comprises a head body and an insertion slot integrally formed on the top of the head body, and an adhesive device with a bottom end penetrating the head body is detachably and slidably inserted into the insertion slot.

[0006] Further improvement is that: the bottom end of the screw rod is also integrally formed with a circular-taipan-shaped positioning block.

[0007] Further improvement is that: the adhesive device comprises a hot melt glue column and a positioning sheet arranged on the outer wall of the hot melt glue column, the bottom end of the hot melt glue column penetrates the bottom surface of the head body, and the outer wall of the positioning sheet is slidably and detachably connected to the inner wall of the insertion slot.

[0008] Further improvement is that: the bottom surface of the positioning sheet is provided with a spring.

[0009] Further improvement is that: the bottom surface of the hot melt glue column is integrally formed with a circular-taipan-shaped guide block.

[0010] Further improvement is that the top end of the hot melt glue column is provided with hard pressing blocks with a plurality of anti-skid grooves integrally formed on the surface.

[0011] After the technical scheme is applied, the utility model has the beneficial effects that when the screw rod of the bolt is screwed in, the adhesion device can be extruded in the screwing process, so that the bottom end of the hot melt glue column of the adhesion device is attached to the surface of the workpiece, and in the process of rotating the screw rod, the hot melt glue column can be simultaneously rubbed and melted, and the flowable hot melt glue after the hot melt of the hot melt glue column is adhered to the bottom surface of the head body, so that after the bolt is screwed to the bottom, the bottom surface of the head body is adhered to the surface of the workpiece through the hot melt glue, the connection between the bolt and the workpiece is more firm, and the bolt is not prone to loosening phenomenon due to torsion in use, and the connection firmness is higher. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0013] Fig. 1 It is the structure schematic view of the bolt front view of the utility model;

[0014] Fig. 2 It is the structure schematic view of the head front view section of the utility model;

[0015] Fig. 3 It is the structure schematic view of the adhesion device front view section of the utility model. DETAILED DESCRIPTION

[0016] The utility model will be further explained in combination with the drawings and specific embodiments.

[0017] Referring to Figs. 1-3The technical scheme adopted in the embodiment is shown as follows: a bolt against falling off, comprising a screw rod 1 and a thread layer 2 integrally formed on the outer wall of the screw rod 1, a bolt head 3 fixedly connected to the top end of the screw rod 1, the bolt head 3 comprising a head body 31 and an insertion slot 32 integrally formed on the top of the head body 31, and an adhesive device 33 detachably and slidably inserted into the insertion slot 32 and penetrating through the bottom of the head body 31, the adhesive device 33 comprising a hot melt glue column 331 and a positioning sheet 333 arranged on the outer wall of the hot melt glue column 331, the bottom of the hot melt glue column 331 penetrating through the bottom surface of the head body 31, and the outer wall of the positioning sheet 333 being slidably and detachably connected to the inner wall of the insertion slot 32. In use, the screw rod 1 is screwed into the threaded hole of a workpiece, at this time, the thread layer 2 on the outer wall of the screw rod 1 is engaged with the threaded hole to screw the screw rod 1 into the threaded hole. When the screw rod 1 is screwed in, the top end of the hot melt glue column 331 of the adhesive device 33 can be extruded in the process of screwing in, so that the bottom end of the hot melt glue column 331 of the adhesive device 33 is extended and adheres to the surface of the workpiece. In the process of rotating the screw rod, the hot melt glue column 331 is rubbed to be hot-melted, and the hot-melted hot melt adhesive is adhered to the bottom surface of the head body 31 and the surface of the workpiece. After the bolt is screwed to the bottom, the bottom surface of the head body 31 is adhered to the surface of the workpiece by the hot melt adhesive, so that the connection between the bolt and the workpiece is more firm and is not easy to be loosened by the torque in use, and the connection firmness is higher.

[0018] The bottom end of the screw rod 1 is also integrally formed with a circular truncated cone-shaped positioning block 4, which is beneficial to conveniently align the threaded hole on the workpiece when the screw rod 1 is screwed in, and the circular truncated cone-shaped structure can slide along the outer wall when the bottom end contacts the threaded hole to accurately position and align the screw rod 1 and the threaded hole.

[0019] The bottom surface of the positioning sheet 333 is provided with a spring 334, which is beneficial to automatically lift and restore the hot melt glue column 331 by the elastic force after the hot melt glue column 331 is extruded.

[0020] The bottom surface of the hot melt glue column 331 is integrally formed with a circular truncated cone-shaped guide block 332, which is beneficial to more quickly generate hot melting by the smaller diameter bottom end to make the hot melt adhesive flow.

[0021] The top end of the hot melt glue column 331 is provided with a hard pressing block 335 with a plurality of anti-skid grooves integrally formed on the surface, which is beneficial to better transmit the pressing force to the hot melt glue column 331 and prevent the hand from slipping when extruding by the anti-skid grooves.

[0022] The utility model discloses a working principle: the utility model uses, and the screw rod 1 is screwed into the threaded hole of workpiece, at this moment can pass through the screw rod 1 outer wall's thread layer 2 and engage with threaded hole and then screw the screw rod 1 into the threaded hole, when the screw rod 1 is screwed in, can extrude the hot melt glue column 331 top end of adhesive device 33 in the screwing process, and then make the hot melt glue column 331 bottom end of adhesive device 33 stretch out, and make its bottom end adhere to the workpiece surface, and then in the process of rotating screw rod, can make hot melt glue column 331 be rubbed and then hot melt simultaneously, and make the flowability hot melt glue of hot melt glue column after hot melting stick on the bottom surface of head body 31 and the surface of workpiece, and then after the bolt is screwed to the bottom, can make the bottom surface of head body 31 stick through hot melt glue and workpiece surface, make the connection between bolt and workpiece more firm, and it is not easy to produce loosening phenomenon when using the torsion, and the connection firmness is higher.

[0023] The utility model wants to protect the structure of product, and the model of each element is not the content of the utility model protection, and it is the prior art, and the element that can realize the function of the utility model above on the market can be as a kind of selection application. Therefore the model of element and other parameters are not described in detail in the utility model. The contribution of the utility model is that each element is combined scientifically.

[0024] The basic principle and main features of the utility model and its advantages are shown and described above, and the skilled person in the art should understand that the utility model is not limited to the above examples, and the above examples and description are only described the principle of the utility model, under the premise of not departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall into the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and its equivalents. The utility model is not described in detail, and it is the prior art of the skilled person.

Claims

1. An anti-loosening bolt, comprising a screw rod (1) and a thread layer (2) integrally formed on the outer wall of the screw rod (1), and a bolt head (3) fixedly connected to the top end of the screw rod (1), characterized in that: The bolt head (3) comprises a head body (31) and an insertion slot (32) integrally formed on the top of the head body (31), and an adhesive device (33) with a bottom end penetrating the head body (31) is detachably and slidably inserted into the insertion slot (32).

2. The anti-loosening bolt according to claim 1, wherein: The bottom end of the screw rod (1) is further integrally formed with a circular truncated cone-shaped positioning block (4).

3. The anti-backout bolt of claim 1, wherein: The adhesive device (33) comprises a hot melt glue column (331) and a positioning sheet (333) arranged on the outer wall of the hot melt glue column (331), the bottom end of the hot melt glue column (331) penetrates the bottom surface of the head body (31), and the outer wall of the positioning sheet (333) is slidably and detachably connected to the inner wall of the insertion slot (32).

4. The anti-backout bolt of claim 3, wherein: The bottom surface of the positioning sheet (333) is provided with a spring (334).

5. The anti-backout bolt of claim 3, wherein: The bottom surface of the hot melt glue column (331) is integrally formed with a circular truncated cone-shaped guide block (332).

6. The anti-backout bolt of claim 3, wherein: The top end of the hot melt glue column (331) is provided with a hard pressing block (335) with a plurality of anti-skid grooves integrally formed on the surface.

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