Self-locking bolt

Abstract

The utility model relates to the technical field of bolts, in particular to a self-locking bolt which comprises a screw rod and a nut in threaded connection with the screw rod, and a hexagonal flat head is fixedly connected to the screw rod. Adaptive grooves are formed in the two sides of the screw rod, an adjusting thread section is slidably connected into each adaptive groove, and a driving mechanism used for driving the two adjusting thread sections to slide is arranged in the screw rod; a fastening piece is further arranged on the screw rod, the fastening piece is connected with the driving mechanism through a linkage piece, and when the driving mechanism drives the adjusting thread section to slide towards the side close to the nut, the fastening piece is driven by the linkage piece to abut against a workpiece installed on the bolt. And in the sliding stroke of the adjusting threaded section, the fastening piece is driven by the linkage piece to abut against the workpiece where the bolt is installed, so that the friction force generated when the bolt and the workpiece are installed can be further improved, and then the stability generated when the bolt is installed can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to a self-locking bolt. Background Art

[0002] Bolts, mechanical parts, cylindrical threaded fasteners equipped with nuts, a type of fastener consisting of a head and a screw (a cylinder with external threads), need to be matched with a nut and are used to fasten two parts with through holes. This type of connection is called a bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated. Therefore, the bolt connection is a detachable connection. According to the force mode of the connection, there are ordinary and reamed holes. According to the shape of the head, there are hexagonal flat heads, round heads, square heads, countersunk heads, etc.

[0003] However, after the bolt is installed in the screw hole, it often withdraws from the screw hole due to external factors, resulting in the inability to completely fix the fixed object. When used in special occasions, there may even be a greater safety hazard. In order to solve the above technical problems, relevant patents have been proposed, such as the Chinese utility model patent with application number 202220224047.6, authorization publication number CN217152572U, and invention name A self-locking bolt. The above patent discloses a self-locking bolt, including a bolt body, the outer circular wall of the bolt body is provided with a mounting groove; a locking assembly is arranged on the inner circular wall of the mounting groove, and the locking assembly includes: two resistance rings, both of which are arranged on the inner circular wall of the mounting groove, and the inner circular wall of the mounting groove is provided with two limit grooves, and the inner circular wall of the limit groove is fixedly installed with a strong spring, and the inner circular wall of the limit groove is movably sleeved with a pressure column, the strong spring is fixedly installed with the pressure column, and the pressure column is fixedly installed with the resistance ring.

[0004] The above patents provide a locking assembly, etc., so as to increase the resistance of the bolt body in the threaded opening, increase the friction force to prevent loosening. However, although the bolts in the prior art such as the above patents can improve the bolt locking effect to a certain extent, their structure is complex. During use, the bolt body, resistance ring, resistance plate and iron sheet need to be linked to achieve the locking effect. The operation process is cumbersome and there are certain shortcomings. Utility Model Content

[0005] The purpose of the utility model is to provide a self-locking bolt to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-locking bolt, comprising a screw rod and a nut threadedly connected to the screw rod, a hexagonal flat head fixedly connected to the screw rod; adapter grooves are provided on both sides of the screw rod, an adjusting thread segment is slidably connected in each of the adapter grooves, and a driving mechanism for driving the two adjusting thread segments to slide is arranged inside the screw rod; a fastener is also provided on the screw rod, and the fastener is connected to the driving mechanism by a linkage member, and when the driving mechanism drives the adjusting thread segment to slide toward the side close to the nut, the fastener is driven by the linkage member to abut against the workpiece on which the bolt is installed, so as to improve the stability of the bolt during installation.

[0007] Furthermore, the driving mechanism includes a driving screw rotatably connected to the inside of the screw rod, a driving block is threadedly connected to the driving screw, and the driving block is installed with a connecting frame through a connecting piece, and an articulated support rod is provided between each adjusting thread segment and the connecting frame.

[0008] Furthermore, the connecting member includes a connecting rod fixedly connected to the connecting frame, the connecting rod is slidably connected to the driving block through a vertical slot, and a pressure spring is also provided between the connecting rod and the vertical slot, and the elastic force of the pressure spring drives the connecting frame away from the driving block.

[0009] Furthermore, the fastener comprises a fastening ring vertically slidably connected to the screw rod, and a plurality of groups of fastening teeth are arranged on the bottom of the fastening ring, and the plurality of groups of fastening teeth are distributed in a circular array with the center of the fastening ring as the axis.

[0010] Furthermore, the linkage member comprises a plurality of linkage frames fixedly connected to the fastening ring, the screw rod is provided with a positioning groove matched with the linkage frame, and the bottom of the linkage frame is fixedly connected to the driving block.

[0011] Furthermore, the screw rod is also provided with a driving part for driving the driving screw rod to rotate.

[0012] Furthermore, the driving part includes a driving cap fixedly connected to the driving screw rod, the driving cap is rotationally connected to the screw rod, and a driving groove is formed on the driving cap.

[0013] Furthermore, a limiting portion is provided on the driving block to improve the stability of the driving block when sliding inside the screw.

[0014] Furthermore, the limiting portion includes a limiting bar fixedly connected to the driving block, and a limiting groove is vertically opened inside the screw rod. When the driving block slides vertically inside the screw rod, the limiting bar slides vertically in the limiting groove.

[0015] Furthermore, the surfaces of the screw, nut and hexagonal flat head are uniformly covered with an electroplating layer, and the surface of the electroplating layer is also uniformly covered with an anti-corrosion coating.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: the self-locking bolt, through the cooperation among the bolt, nut, hexagonal flat head, adjusting thread section, driving mechanism and fastener, during the bolt installation process, the adjusting thread section slides toward the side of the inner thread of the nut, so that the adjusting thread section fits tightly with the inner thread of the nut, increasing the friction force, thereby ensuring the stability of the bolt during installation, avoiding the shaking of the bolt during the installation of the workpiece, and achieving better use effect, and in the sliding stroke of the adjusting thread section, the fastener is driven by the linkage to abut the workpiece on which the bolt is installed, thereby further improving the friction force between the bolt and the workpiece during installation, and further improving the stability of the bolt during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 The overall structural diagram provided for the embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the overall top view structure provided for an embodiment of the utility model;

[0020] Figure 3 for Figure 2 Schematic diagram of the AA section structure along the middle edge;

[0021] Figure 4 A schematic diagram of the internal structure of a screw provided in an embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the installation position structure of the pressure spring provided in an embodiment of the utility model.

[0023] Explanation of the reference numerals in the accompanying drawings: 1. Screw rod; 2. Nut; 3. Hexagonal flat head; 4. Driving screw rod; 5. Adjusting threaded section; 6. Connecting frame; 7. Articulated support rod; 8. Driving block; 9. Connecting rod; 10. Fastening ring; 11. Fastening teeth; 12. Linkage frame; 13. Driving cap; 14. Driving groove; 15. Pressure spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 The utility model provides a technical solution: a self-locking bolt, comprising a screw rod 1 and a nut 2 threadedly connected to the screw rod 1, a hexagonal flat head 3 fixedly connected to the nut 2; adapter grooves are provided on both sides of the screw rod 1, an adjusting thread segment 5 is slidably connected in each adapter groove, and a driving mechanism for driving the two adjusting thread segments 5 to slide is arranged inside the screw rod 1; a fastener is also provided on the screw 1, and the fastener and the driving mechanism are connected by a linkage member. When the driving mechanism drives the adjusting thread segment 5 to slide toward the side close to the nut 2, the fastener is driven by the linkage member to abut against the workpiece on which the bolt is installed, so as to improve the stability of the bolt during installation.

[0026] Specifically, the self-locking bolt includes a screw rod 1 and a nut 2 threadedly connected to the screw rod 1, and a hexagonal flat head 3 is fixedly connected to the screw rod 1; both sides of the screw rod 1 are provided with adapting grooves, and an adjusting thread segment 5 is slidably connected in each adapting groove, and specifically, the adjusting thread segment 5 is adapted to the inner thread of the nut 2. A driving mechanism for driving the two adjusting thread segments 5 to slide is provided inside the screw rod 1. Under normal circumstances, the driving mechanism is used to drive the adjusting thread segment 5 to slide in the screw rod 1, so that the adjusting thread segment 5 and the thread on the screw rod 1 are in a spiral track, and the bolt can be normally installed on the predetermined workpiece position. After the installation is completed, the driving mechanism is used to drive the adjusting thread segment 5 to slide, and the adjusting thread segment 5 slides toward the inner thread side of the nut 2, so that the adjusting thread segment 5 and the inner thread of the nut 2 are closely fitted, increasing the friction force, thereby ensuring the stability of the bolt during installation, avoiding the shaking of the bolt during installation of the workpiece, and achieving a better use effect. A fastener is also provided on the screw rod 1, and the fastener is connected to the driving mechanism through a linkage. When the driving mechanism drives the adjusting thread segment 5 to slide toward the side close to the nut 2, the fastener is driven by the linkage to abut against the workpiece on which the bolt is installed, thereby further improving the friction between the bolt and the workpiece during installation, and further improving the stability of the bolt during installation.

[0027] In the embodiment provided by the utility model, specifically, the driving mechanism includes a driving screw 4 rotatably connected to the inside of the screw 1, a driving block 8 is threadedly connected to the driving screw 4, and the driving block 8 is installed with a connecting frame 6 through a connecting piece, and a hinged support rod 7 is arranged between each adjusting thread segment 5 and the connecting frame 6, and the connecting piece includes a connecting rod 9 fixedly connected to the connecting frame 6, and the connecting rod 9 is slidably connected to the driving block 8 through a vertical groove, and a pressure spring 15 is also arranged between the connecting rod 9 and the vertical groove, and the elastic force of the pressure spring 15 drives the connecting frame 6 away from the driving block 8. At this moment, during use, when the driving screw 4 rotates, it will drive the connecting rod 9 to slide downward through the driving block 8, and then drive the adjusting thread segment 5 to slide horizontally through the hinged support rod 7, so that the adjusting thread segment 5 abuts against the internal thread of the nut 2, increasing the friction of the bolt, and thus improving the stability of the bolt during installation.

[0028] In the embodiment provided by the utility model, the fastener includes a fastening ring 10 vertically slidably connected to the screw rod 1, and a plurality of groups of fastening teeth 11 are arranged on the bottom of the fastening ring 10. Specifically, the fastening teeth 11 can be made of elastic material to increase the friction. The plurality of groups of fastening teeth 11 are distributed in a circular array with the center of the fastening ring 10 as the axis. The linkage parts include a plurality of groups of linkage frames 12 fixedly connected to the fastening ring 10. The screw rod 1 is provided with a positioning groove adapted to the linkage frame 12, and the bottom of the linkage frame 12 is fixedly connected to the driving block 8. At this moment, when the driving block 8 slides downward, it will drive the linkage frame 12 to slide downward, and the fastening ring 10 is driven to slide downward by the linkage frame 12, thereby increasing the friction when the bolt is installed, and the effect is better.

[0029] In the embodiment provided by the utility model, the screw rod 1 is also provided with a driving part for driving the driving screw rod 4 to rotate, so as to facilitate driving the driving screw rod 4 to rotate. The driving part includes a driving cap 13 fixedly connected to the driving screw rod 4, the driving cap 13 is rotatably connected to the screw rod 1, and a driving groove 14 is provided on the driving cap 13. Specifically, the driving groove 14 can be a "cross" groove to meet the working needs.

[0030] In the embodiment provided by the utility model, a limiting portion is provided on the driving block 8 to improve the stability of the driving block 8 when sliding inside the screw rod 1. The limiting portion includes a limiting bar fixedly connected to the driving block 8, and a limiting groove is vertically opened inside the screw rod 1. When the driving block 8 slides vertically inside the screw rod 1, the limiting bar slides vertically in the limiting groove, thereby improving the stability of the driving block 8 when sliding vertically.

[0031] In the embodiment provided by the utility model, the surfaces of the screw 1, the nut 2 and the hexagonal flat head 3 are uniformly covered with an electroplating layer, and the surface of the electroplating layer is also uniformly covered with an anti-corrosion coating. The electroplating layer and the anti-corrosion coating can prevent the outer surface of the bolt from oxidizing and rusting even when exposed to an open air environment, thereby preventing the rust from affecting the normal operation of the bolt.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking bolt, comprising a screw rod (1) and a nut (2) threadedly connected to the screw rod (1), characterized in that: A hexagonal flat head (3) is fixedly connected to the screw rod (1); The screw rod (1) is provided with an adapting groove on both sides, and an adjusting thread segment (5) is slidably connected in each of the adapting grooves. A driving mechanism for driving the two adjusting thread segments (5) to slide is provided inside the screw rod (1); The screw rod (1) is also provided with a fastener, which is connected to the driving mechanism via a linkage member. When the driving mechanism drives the adjusting threaded section (5) to slide towards the side close to the nut (2), the fastener is driven by the linkage member to abut against the workpiece on which the bolt is installed, so as to improve the stability of the bolt during installation.

2. A self-locking bolt according to claim 1, characterized in that: The driving mechanism comprises a driving screw (4) rotatably connected to the inside of the screw (1); a driving block (8) is threadedly connected to the driving screw (4); the driving block (8) is mounted on a connecting frame (6) via a connecting piece; and a hinged support rod (7) is provided between each adjusting thread segment (5) and the connecting frame (6).

3. A self-locking bolt according to claim 2, characterized in that: The connecting member comprises a connecting rod (9) fixedly connected to the connecting frame (6); the connecting rod (9) is slidably connected to the driving block (8) via a vertical groove; and a pressure spring (15) is also arranged between the connecting rod (9) and the vertical groove; the elastic force of the pressure spring (15) drives the connecting frame (6) away from the driving block (8).

4. A self-locking bolt according to claim 2, characterized in that: The fastener comprises a fastening ring (10) vertically slidably connected to a screw rod (1), a plurality of groups of fastening teeth (11) being arranged on the bottom of the fastening ring (10), and the plurality of groups of fastening teeth (11) being distributed in a circular array with the center of the fastening ring (10) as the axis.

5. A self-locking bolt according to claim 4, characterized in that: The linkage parts include a plurality of linkage frames (12) fixedly connected to a fastening ring (10), a positioning groove matched with the linkage frames (12) is provided on the screw rod (1), and the bottom of the linkage frame (12) is fixedly connected to a driving block (8).

6. A self-locking bolt according to claim 2, characterized in that: The screw rod (1) is also provided with a driving portion for driving the driving screw rod (4) to rotate.

7. A self-locking bolt according to claim 6, characterized in that: The driving part comprises a driving cap (13) fixedly connected to the driving screw rod (4); the driving cap (13) is rotatably connected to the screw rod (1); and a driving groove (14) is provided on the driving cap (13).

8. A self-locking bolt according to claim 2, characterized in that: A limiting portion is provided on the driving block (8) to improve the stability of the driving block (8) when sliding inside the screw rod (1).

9. A self-locking bolt according to claim 8, characterized in that: The limiting portion comprises a limiting strip fixedly connected to the driving block (8); a limiting slot is vertically provided inside the screw rod (1); when the driving block (8) slides vertically inside the screw rod (1), the limiting strip slides vertically in the limiting slot.

10. A self-locking bolt according to claim 1, characterized in that: The surfaces of the screw rod (1), the nut (2) and the hexagonal flat head (3) are uniformly covered with an electroplating layer, and the surface of the electroplating layer is also uniformly covered with an anti-corrosion coating.

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