Stop combined screw

Abstract

The utility model relates to the technical field of screws, in particular to a locking combined screw. According to the technical scheme, the screw comprises a screw rod, a nut is fixedly installed at one end of the screw rod, a cross-shaped groove is formed in the top end of the nut, a stop assembly is installed on the screw rod in a clamped mode, a transverse positioning column is fixedly installed on the outer side wall of the screw rod and connected with the stop assembly in a clamped mode, and a longitudinal positioning column is fixedly installed at the bottom of the nut. The longitudinal positioning column is connected with the stop assembly in a clamped mode. The screw rod and the locking assembly can be stably connected through the transverse positioning column, the nut and the locking assembly can be stably connected through the longitudinal positioning column, after the screw is screwed into a connecting piece, the locking assembly is fixed to the connecting piece, and the screw rod and the nut can be locked and positioned; and under the condition that the screw rod is not loosened, the nut can be prevented from being touched by external force to generate rotation, and the reliability of preventing the screw from loosening is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, and in particular to a locking combination screw. Background Technology

[0002] A locking screw is a special type of screw used to restrict the movement of moving parts or to position parts. It is fixed by bringing the head or bottom surface of the bolt into contact with an object. The head or bottom surface of the bolt that contacts the object is generally machined into a flat surface and hardened through processes such as quenching to enhance its wear resistance.

[0003] Existing locking combination screws typically employ a friction locking method, requiring a locking ring or locking washer to be fitted onto the screw shank. When the nut presses the locking ring or locking washer against the surface of the connector, it increases the frictional resistance between the bottom of the nut and the connector, effectively reducing the probability of the screw loosening when the equipment vibrates.

[0004] However, in actual use, adding a retaining ring or retaining washer can reduce the probability of screw loosening due to equipment vibration. However, the nut end of the screw is located on the outside of the connector. If the nut is touched by external force, it is difficult to avoid it rotating. Therefore, it will drive the screw rod screwed into the connector to rotate, which significantly reduces the reliability of preventing screw loosening. Therefore, this application proposes a retaining combination screw that can prevent loosening caused by external force. Utility Model Content

[0005] The purpose of this invention is to address the problem in the prior art where the nut end is easily touched by external force, causing the screw rod to rotate. This invention proposes a locking combination screw that can prevent loosening caused by external force.

[0006] The technical solution of this utility model: a locking combination screw, including a screw shank, one end of which is fixedly fitted with a nut, the top of which is provided with a cross-shaped groove, and also including:

[0007] A stop assembly is snapped onto the screw rod and is used to lock and fix the screw.

[0008] A transverse positioning post is fixedly installed on the outer side wall of the screw rod, and the transverse positioning post is engaged with the stop assembly.

[0009] A longitudinal positioning post is fixedly installed at the bottom of the nut and is engaged with the stop assembly.

[0010] Optionally, the stop assembly includes two symmetrically arranged semi-circular pads, which are snapped onto the outer wall of the screw rod. The two semi-circular pads are joined together to form a ring structure and positioned below the nut.

[0011] Optionally, a transverse positioning groove is chiseled on the inner wall of the semi-circular pad, and one end of the transverse positioning post is inserted into the matching transverse positioning groove and engaged with it.

[0012] Optionally, the top of the semi-circular pad is chiseled with a longitudinal positioning groove, and the longitudinal positioning post is embedded in the matching longitudinal positioning groove and engaged with it.

[0013] Optionally, a reinforcing plate is fixedly installed on the outer wall of the semi-circular pad, and the reinforcing plate has assembly holes and welding joints.

[0014] Optionally, the two ends of the semi-circular pad that are far apart are provided with connecting parts, and the two connecting parts provided on the same side are threaded with bolts.

[0015] Optionally, the outer wall of the screw rod near the nut end is provided with a cutting end face, and one end of the transverse positioning post is fixedly installed at the cutting end face.

[0016] Compared with the prior art, this application includes at least one of the following beneficial technical effects: the interlocking connection between the transverse positioning post and the semi-circular pad enables a stable connection between the screw rod and the stop component; the interlocking connection between the longitudinal positioning post and the semi-circular pad enables a stable connection between the nut and the stop component; when the screw is screwed into the connector, the stop component is fixed on the connector, which can lock and position the screw rod and the nut. While ensuring that the screw rod will not loosen, it can also prevent the nut from being rotated by external force, effectively improving the reliability of preventing the screw from loosening. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the stop assembly structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the screw rod structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the nut structure of this utility model.

[0021] Reference numerals: 1. Screw shank; 11. Cutting end face; 12. Lateral positioning post;

[0022] 2. Stop assembly;

[0023] 21. Semi-circular pad; 211. Transverse positioning groove; 212. Longitudinal positioning groove;

[0024] 22. Reinforcing plate; 221. Assembly hole; 222. Weld joint;

[0025] 23. Connecting part; 231. Bolt;

[0026] 3. Nut; 31. Cross-shaped groove; 32. Longitudinal positioning post. Detailed Implementation

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] Example

[0029] like Figures 1-4 As shown, this utility model proposes a locking combination screw, including a screw shank 1. A nut 3 is fixedly installed at one end of the screw shank 1. The top of the nut 3 has a cross-shaped groove 31. Inserting the end of a screwdriver into the cross-shaped groove 31 will rotate the screw, making it easy to screw the screw shank 1 into the connector. A locking component 2 is engaged on the screw shank 1. A transverse positioning post 12 is fixedly installed on the outer wall of the screw shank 1. During the screw shank 1 screwing process, the locking component 2 is sleeved on the screw shank 1. When the transverse positioning post 12 is inserted into the inner wall of the locking component 2 and... After engaging with it, the screw rod 1 and the stop assembly 2 are firmly connected as one unit. Several longitudinal positioning pins 32 are fixedly installed at the bottom of the nut 3. When the longitudinal positioning pins 32 are inserted into the stop assembly 2 and engaged with it, the nut 3 and the stop assembly 2 are stably connected as one unit. After the stop assembly 2 is fixed to the outside of the connector, the screw rod 1 and the nut 3 can be locked and fixed at the same time. This not only prevents the screw rod 1 from loosening due to equipment vibration, but also prevents the nut 3 from rotating after being touched by external force, effectively improving the reliability of preventing the screw from loosening.

[0030] Furthermore, the stop assembly 2 consists of two semi-circular pads 21. The two semi-circular pads 21 are spliced ​​into a ring structure and placed below the nut 3. After the screw is tightened, the stop assembly 2 can be tightly clamped between the connector and the nut 3. Several transverse positioning grooves 211 are carved on the inner side wall of the semi-circular pads 21. One end of the transverse positioning post 12 is inserted into the matching transverse positioning groove 211 and tightly engaged with it, ensuring that the screw rod 1 can be connected to the stop assembly 2 as a whole. A longitudinal positioning groove 212 is carved on the top of the semi-circular pads 21. The longitudinal positioning post 32 is embedded in the matching longitudinal positioning groove 212 and tightly engaged with it, ensuring that the nut 3 can be connected to the stop assembly 2 as a whole.

[0031] Secondly, the aforementioned longitudinal positioning groove 212 is designed with an opening at the top and on one side. During the process of screwing the screw into the connector, when the gap between the nut 3 and the surface of the connector approaches and exceeds the thickness of the semi-circular pad 21, the semi-circular pad 21 is pushed towards the screw rod 1 by a horizontal pushing method. At this time, the longitudinal positioning post 32 is embedded in the groove from the opening on the side of the longitudinal positioning groove 212, which facilitates the assembly of the semi-circular pad 21.

[0032] Furthermore, a reinforcing plate 22 is fixedly installed on the outer wall of the semi-circular pad 21. The reinforcing plate 22 has assembly holes 221 and welding joints 222. After the screw rod 1 is fully screwed into the connector, screws can be installed at the assembly holes 221 to fix the reinforcing plate 22 to the outside of the connector, or spot welding can be performed at the welding joints 222 to fix the reinforcing plate 22 to the connector, effectively improving the firmness of the connection between the stop assembly 2 and the connector. Both ends of the semi-circular pad 21 that are far apart are provided with connecting parts 23. When the two semi-circular pads 21 are spliced ​​into one piece, the two overlapping connecting parts 23 are fixed into one piece using bolts 231, effectively improving the firmness of the connection between the two semi-circular pads 21 and increasing the structural strength of the stop assembly 2.

[0033] Secondly, a cutting end face 11 is provided on the outer wall of the screw rod 1 near the nut 3. One end of the transverse positioning post 12 is welded and fixed to the cutting end face 11. The flat cutting end face 11 on the outer wall of the screw rod 1 makes it easier to weld and fix the transverse positioning post 12 to the outer wall of the screw rod 1 compared to the arc structure of the outer wall of the screw rod 1.

[0034] In this embodiment, the end of a screwdriver is first inserted into the cross-shaped groove 31 to rotate the nut 3, thereby screwing the screw rod 1 into the connector in a rotating state. During the screw rod 1 insertion, when the nut 3 approaches the connector and the gap between the bottom of the nut 3 and the connector is greater than the thickness of the stop assembly 2, the two semi-circular pads 21 are joined to form a ring structure, allowing the stop assembly 2 to fit onto the outer wall of the screw rod 1. At this time, the transverse positioning pin 12 is inserted into the transverse positioning groove 211, connecting the screw rod 1 and the stop assembly 2 as one unit. During the installation of the semi-circular pads 21, the longitudinal positioning pin 32 is pushed in horizontally. The nut 3 is embedded in the longitudinal positioning groove 212 in a way that allows the stop component 2 to be connected as one unit. After the stop component 2 is tightly clamped between the nut 3 and the connector, screws are installed at the assembly hole 221 and the reinforcing plate 22 is fixed to the outside of the connector. Alternatively, spot welding can be performed at the welding joint 222 to ensure that the reinforcing plate 22 can be firmly connected to the connector as one unit. After the stop component 2 is fixed to the outside of the connector, it can not only lock and fix the screw rod 1 to prevent the screw rod 1 from loosening due to equipment vibration, but also lock and fix the nut 3 to prevent external force from touching the nut 3 and causing the screw to rotate, thus effectively improving the reliability of preventing the screw from loosening.

[0035] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A locking combination screw, comprising a screw shank (1), one end of which is fixedly fitted with a nut (3), the top end of which is provided with a cross-shaped groove (31), characterized in that, It also includes: The stop assembly (2) is engaged and installed on the screw rod (1), and the stop assembly (2) is used to lock and fix the screw. A transverse positioning post (12) is fixedly installed on the outer side wall of the screw rod (1), and the transverse positioning post (12) is engaged with the stop assembly (2). A longitudinal positioning post (32) is fixedly installed at the bottom of the nut (3) and is engaged with the stop assembly (2).

2. The locking combination screw according to claim 1, characterized in that, The stop assembly (2) includes two symmetrically arranged semi-circular pads (21), which are snapped onto the outer wall of the screw rod (1). The two semi-circular pads (21) are spliced ​​together to form a ring structure and are located below the nut (3).

3. A locking combination screw according to claim 2, characterized in that, A transverse positioning groove (211) is chiseled on the inner wall of the semi-circular pad (21), and one end of the transverse positioning post (12) is inserted into the matching transverse positioning groove (211) and engaged with it.

4. A locking combination screw according to claim 3, characterized in that, The top of the semi-circular pad (21) is chiseled with a longitudinal positioning groove (212), and the longitudinal positioning post (32) is embedded in the matching longitudinal positioning groove (212) and engaged with it.

5. A locking combination screw according to claim 4, characterized in that, A reinforcing plate (22) is fixedly installed on the outer wall of the semi-circular pad (21), and the reinforcing plate (22) has assembly holes (221) and welding joints (222).

6. A locking combination screw according to claim 5, characterized in that, The two ends of the semi-circular pad (21) that are far apart are provided with connecting parts (23), and the two connecting parts (23) provided on the same side are threaded with bolts (231).

7. A locking combination screw according to claim 1, characterized in that, The screw rod (1) has a cutting end face (11) on the outer side wall near the nut (3), and one end of the transverse positioning post (12) is fixedly installed at the cutting end face (11).

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