Nut column with helical teeth

Abstract

The utility model provides a nut column with helical teeth, which comprises an upper nut column, the bottom end of the upper nut column is connected with a lower nut column, threaded holes are formed in the centers of the upper nut column and the lower nut column in a penetrating manner, and self-locking mechanisms are arranged on the outer side of the top end of the threaded hole of the upper nut column and the outer side of the bottom end of the threaded hole of the lower nut column; a conical cavity is formed in the bottom end of the upper nut column, and a conical boss is arranged at the bottom end of the lower nut column. According to the nut column with the helical teeth, by arranging the self-locking mechanism, the conical boss, the conical cavity, the straight teeth, the helical teeth and other structures, the effects of automatically locking a connected screw rod and conveniently applying torsion to a device can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fastener, more specifically, relate to a nut column with bevel gear. BACKGROUND

[0002] The press-in nut column is also called a press-in stud or a nut column, and the press-in nut is a kind of nut applied to thin plates or sheet metal, which is widely used in the assembly of electromechanical and light industrial products such as automobiles, aviation, railroads, refrigeration, elevators, switches, instruments, furniture, decoration, etc. However, for some special assembly fields, such as the engine of an automobile, which often vibrates or is subjected to a large external force, the existing press-in nut is not firmly connected with the workpiece, and is prone to shaking, which causes the nut to easily fall off the workpiece. In addition, the existing press-in nut is pressed onto the workpiece, and relative rotation between the press-in nut and the workpiece is prone to occur, which results in poor locking effect, poor anti-following effect, poor torsional resistance, and difficulty in meeting the use requirements of workpieces that need to be fixed by a large torque.

[0003] In view of the above problems, in terms of the technical problems of the existing nut column that is not firmly connected with the workpiece and is prone to relative rotation with the workpiece, a lot of searches have been conducted, and a patent with the patent announcement number CN221824263U, a bevel gear anti-falling press-in nut, has been found. The bevel gear anti-falling press-in nut includes a nut body, a meshing portion fixedly connected to one end of the nut body, the radial cross-sections of the nut body and the meshing portion are both circular ring shapes, the outer diameter of the meshing portion is smaller than the outer diameter of the nut body, the outer periphery of the meshing portion is provided with a plurality of bevel gears, the adjacent bevel gears form inclined grooves therebetween, an inner hole penetrating through the meshing portion is provided in the nut body, the inner hole is provided with an internal thread, and an annular groove is provided at the connection between the nut body and the meshing portion. The press-in nut plays a role of reinforcing and locking through the bevel gears and the annular groove, can be tightly fixed on the workpiece, has high connection strength with the workpiece, is not prone to shaking, can effectively prevent the press-in nut from falling off the workpiece, and is not prone to relative rotation with the workpiece, has good locking effect, good anti-following effect, strong torsional resistance, and can meet the use requirements of workpieces that need to be fixed by a large torque. However, the technical solution provided by the patent has the following problems:

[0004] (1) The meshing portion at the bottom end of the device has a small area, and the bevel gears at the bottom end are in a sawtooth shape, which can easily scratch the workpiece during use and cause unnecessary damage to the workpiece;

[0005] (2) The outer surface of the device is relatively smooth, and when a torque is applied to the nut column, slipping is prone to occur, which can make it difficult to tighten the nut column during assembly and difficult to have enough force to disassemble the nut.

[0006] The utility model can play the roles of automatically locking the connected screw rod and facilitating the application of torque to the device. UTILITY MODEL CONTENT

[0007] The utility model aims at solving the technical problem in the prior art, provide a nut post with bevel gear, reach automatic locking connected screw rod and convenient for the effect of exerting torque to the device.

[0008] In order to achieve the above object, the utility model provides the following technical scheme: a nut post with bevel gear, it includes: upper nut post, the lower nut post is connected to the bottom end of upper nut post, and the threaded hole is centrally provided with a threaded hole in upper nut post and lower nut post, and the threaded hole top outside of upper nut post and the threaded hole bottom outside of lower nut post are arranged with self-locking mechanism;The bottom end of upper nut post is provided with a conical cavity, and the bottom end of lower nut post is arranged with a conical boss;

[0009] The self-locking mechanism includes: extrusion block, first limit block, first limit slot, installation slot, second limit block, return spring, second limit slot and locking block, and the threaded hole top right side of upper nut post is provided with installation slot, and the installation slot right end is installed with extrusion block, and the first limit slot is centrally provided with the first limit slot in the right end of extrusion block, and the first limit block is connected to the right end of extrusion block, and the first limit block is arranged in the first limit slot, and the locking block is installed at the bottom end of extrusion block, and the second limit slot is centrally provided with the second limit slot in the bottom end of locking block, and the second limit block is connected to the left end of return spring, and the second limit block left end is connected to the left end inner wall of second limit slot, and the second limit block and return spring are arranged in the second limit slot.

[0010] Further preferred scheme: the first limit block is arranged in the installation slot, and the first limit block bottom end and the second limit block right end are smooth round surfaces.

[0011] Further preferred scheme: the self-locking mechanism has four groups, and the four groups of self-locking mechanisms are arranged on the left and right sides of the threaded hole top of upper nut post and the left and right sides of the threaded hole bottom of lower nut post.

[0012] Further preferred scheme: the outer side of the top of upper nut post and the outer side of the bottom of lower nut post are provided with outward protruding straight teeth.

[0013] Further preferred scheme: the outer side of the bottom of upper nut post and the outer side of the top of lower nut post are provided with inwardly arranged bevel gears.

[0014] Further preferred scheme: the bevel gears of upper nut post and lower nut post are oppositely inclined.

[0015] Further preferred scheme: the size of the conical boss is one millimeter larger than the size of the conical cavity.

[0016] Beneficial effects:

[0017] 1. By setting the self-locking mechanism, the effect of automatically locking the connected screw is achieved. When the lower nut column moves down to contact the nut column, the first extrusion block will preferentially contact the workpiece, thereby pushing the extrusion block to move upward relative to the lower nut column, thereby pushing the locking block to move inward, so that the locking block compresses the screw, thereby locking the screw to achieve the effect of self-locking. Effectively avoid the loosening of the device due to external interference, and enhance the stability of the device;

[0018] 2. By setting the tapered boss and tapered cavity, the effect of further automatically locking the connected screw is achieved. Because the tapered boss is slightly larger than the tapered cavity, when the upper nut column and the lower nut column are integrated, the tapered cavity will generate an inward extrusion force on the tapered boss, thereby causing the threaded hole in the middle of the tapered boss to press the connected screw, thereby increasing the friction between the threaded hole and the screw.

[0019] 3. By setting the straight teeth and inclined teeth, the effect of facilitating the application of torque to the device is achieved. Only when it is slightly tightened, the inclined teeth can avoid slipping during tightening by rotating the nut column by hand, and the inclined direction of the inclined teeth of the upper nut column and the lower nut column is opposite, facilitating the application of torque in different directions to the upper nut column and the lower nut column, thereby facilitating the separation of the upper nut column and the lower nut column. When the device needs to be tightened firmly, a common tool such as a vise can be used to tighten the straight teeth, thereby applying greater torque to the device, thereby tightening the device.

[0020] 4. As described above, the nut column with inclined teeth can automatically lock the connected screw and facilitate the application of torque to the device by setting the self-locking mechanism, tapered boss, tapered cavity, straight teeth and inclined teeth. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the overall structure schematic diagram of the utility model.

[0022] Figure 2 It is the overall sectional structure schematic diagram of the utility model.

[0023] Figure 3 It is the Figure 2 It is the enlarged structure schematic diagram of A in the middle.

[0024] Figure 4 It is the structure schematic diagram when the upper nut column and the lower nut column are separated.

[0025] Figures 1-4Middle: 1, upper nut column; 2, self-locking mechanism; 3, lower nut column; 4, threaded hole; 5, straight tooth; 6, bevel gear; 7, conical boss; 8, conical cavity; 201, extrusion block; 202, first limiting block; 203, first limiting groove; 204, mounting groove; 205, second limiting block; 206, return spring; 207, second limiting groove; 208, locking block. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Figures 1-4 The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0027] Please refer to Figures 1-4 In the embodiments of the utility model, a nut column with bevel gear comprises: an upper nut column 1, a lower nut column 3 connected to the bottom end of the upper nut column 1, a threaded hole 4 centrally and through the upper nut column 1 and the lower nut column 3, a self-locking mechanism 2 arranged on the outer side of the top end of the threaded hole 4 of the upper nut column 1 and the outer side of the bottom end of the threaded hole 4 of the lower nut column 3; a conical cavity 8 formed in the bottom end of the upper nut column 1, and a conical boss 7 arranged on the bottom end of the lower nut column 3.

[0028] The self-locking mechanism 2 comprises: a pressing block 201, a first limiting block 202, a first limiting groove 203, a mounting groove 204, a second limiting block 205, a return spring 206, a second limiting groove 207 and a locking block 208, the threaded hole 4 of the upper nut column 1 is provided with the mounting groove 204 at the top right side, the mounting groove 204 is provided with the pressing block 201 at the right end, the first limiting groove 203 is formed in the center of the right end of the pressing block 201, the first limiting block 202 is connected to the center of the right end of the pressing block 201, the first limiting block 202 is arranged in the first limiting groove 203, the locking block 208 is mounted at the bottom end of the pressing block 201, the second limiting groove 207 is formed in the center of the bottom end of the locking block 208, the second limiting block 205 is connected to the center of the bottom end of the locking block 208, the return spring 206 is connected to the left end of the second limiting block 205, the left end of the second limiting block 205 is connected to the left end inner wall of the second limiting groove 207, and the second limiting block 205 and the return spring are arranged in the second limiting groove 207; through the self-locking mechanism 2, the connected screw rod is automatically locked, when the lower nut column 3 moves downwards to contact the self-locking mechanism 2, the pressing block 201 first contacts the workpiece, the pressing block 201 moves upwards relative to the lower nut column 3, the locking block 208 moves towards the inside, the locking block 208 presses the screw rod, the screw rod is locked, the device is prevented from loosening due to external interference, and the stability of the device is enhanced; through the mounting groove 204, the first limiting groove 203 and the second limiting groove 207, the device provides sufficient mounting space; the first limiting block 202 and the second limiting block 205 are provided, the displacement of the pressing block 201 and the locking block 208 is limited, the pressing block 201 and the locking block 208 are prevented from moving by themselves, and the device is kept in the original position through the return spring.

[0029] In the embodiment of the utility model, the first limiting block 202 is obliquely arranged in the mounting groove 204, the bottom end of the first limiting block 202 and the right end of the second limiting block 205 are smooth round surfaces, the first limiting block 202 can push the second limiting block 205 to move inwards, and the first limiting block 202 and the second limiting block 205 are prevented from being stuck.

[0030] In the embodiment of the utility model, the self-locking mechanism 2 has four groups, the four groups of self-locking mechanisms 2 are arranged on the left and right sides of the top end of the threaded hole 4 of the upper nut column 1 and the left and right sides of the bottom end of the threaded hole 4 of the lower nut column 3, and the locking force is enhanced.

[0031] In the embodiment of the utility model, the top end of the outer side of the upper nut column 1 and the bottom end of the outer side of the lower nut column 3 are provided with outwardly protruding straight teeth 5, the device is facilitated to apply greater torsion force.

[0032] The utility model discloses embodiments, the upper nut post 1 bottom end outside and lower nut post 3 top end outside are provided with the oblique tooth 6 that sets up to the inside, reach the effect that avoid the skidding when tightening.

[0033] The utility model discloses embodiments, the oblique direction of the oblique tooth 6 of upper nut post 1 and lower nut post 3 is opposite, reach the effect that facilitate to exert the torsion of different directions to upper nut post 1 and lower nut post 3, thereby facilitating to separate upper nut post 1 and lower nut post 3.

[0034] The utility model discloses embodiments, the size of conical boss 7 is all greater than the size of conical cavity 8 by a millimeter, reach the effect that when upper nut post 1 and lower nut post 3 are connected as a whole, have the self-locking ability, when, because conical boss 7 is slightly larger than conical cavity 8, when upper nut post 1 and lower nut post 3 are connected as a whole, conical cavity 8 will produce an inward extrusion force to conical boss 7, thereby make the screw hole 4 in the middle of conical boss 7 press to the connected screw, thereby increase the friction between screw hole 4 and screw.

[0035] Working principle: when using, first install lower nut post 3 on the screw to be connected, when lower nut post 3 moves down to the self-locking mechanism 2 and contacts the nut post, first extrusion block 201 will contact the workpiece first, thereby push extrusion block 201 and move upwards relative to lower nut post 3, thereby push locking block 208 and move to the inside, make locking block 208 press the screw, thereby lock the screw and reach the effect of self-locking, then install into upper nut post 1 because conical boss 7 is slightly larger than conical cavity 8, when upper nut post 1 and lower nut post 3 are connected as a whole, conical cavity 8 will produce an inward extrusion force to conical boss 7, thereby make the screw hole 4 in the middle of conical boss 7 press to the connected screw, thereby increase the friction between screw hole 4 and screw, when upper nut post 1 and lower nut post 3 are connected as a whole, have the self-locking ability; When only need to tighten slightly, only need to rotate the nut post by hand, the outer side of the bottom end of upper nut post 1 and the outer side of the top end of lower nut post 3 are provided with the oblique tooth 6 that sets up to the inside, can avoid the skidding when tightening, and the oblique direction of the oblique tooth 6 of upper nut post 1 and lower nut post 3 is opposite, facilitate to exert the torsion of different directions to upper nut post 1 and lower nut post 3, thereby facilitating to separate upper nut post 1 and lower nut post 3, when the device needs to be tightened firmly, can be clamped straight teeth 5 by general tools such as vise, thereby exert greater torsion to the device, thereby tighten the device, and straight teeth 5 are outwardly convex, and oblique tooth 6 is inwardly concave, can avoid that oblique tooth 6 will bring disturbance to the use of tool.

Claims

1. A threaded nut post comprising: The upper nut column (1) is characterized in that the bottom end of the upper nut column (1) is connected with a lower nut column (3), a threaded hole (4) is arranged in the center of the upper nut column (1) and the lower nut column (3), a self-locking mechanism (2) is arranged on the outer side of the top end of the threaded hole (4) of the upper nut column (1) and the outer side of the bottom end of the threaded hole (4) of the lower nut column (3); a tapered cavity (8) is arranged at the bottom end of the upper nut column (1), and a tapered boss (7) is arranged at the bottom end of the lower nut column (3). The self-locking mechanism (2) comprises a pressing block (201), a first limiting block (202), a first limiting groove (203), a mounting groove (204), a second limiting block (205), a return spring (206), a second limiting groove (207) and a locking block (208), the top right side of the threaded hole (4) of the upper nut column (1) is provided with a mounting groove (204), the right end of the mounting groove (204) is provided with a pressing block (201), the right end of the pressing block (201) is provided with a first limiting groove (203), the right end of the pressing block (201) is connected with a first limiting block (202), the first limiting block (202) is arranged in the first limiting groove (203), the bottom end of the pressing block (201) is provided with a locking block (208), the bottom end of the locking block (208) is provided with a second limiting groove (207), the bottom end of the locking block (208) is connected with a second limiting block (205), the left end of the second limiting block (205) is connected with a return spring (206), the left end of the second limiting block (205) is connected to the left end inner wall of the second limiting groove (207), and the second limiting block (205) and the return spring are arranged in the second limiting groove (207).

2. A threaded nut post with bevels according to claim 1, characterized in that: The first limiting block (202) is arranged in the mounting groove (204) in an inclined manner, and the bottom end of the first limiting block (202) and the right end of the second limiting block (205) are smooth circular surfaces.

3. A threaded nut post with bevels according to claim 2, characterized in that: The self-locking mechanism (2) has four groups, and the four groups of self-locking mechanisms (2) are arranged on the left and right sides of the top end of the threaded hole (4) of the upper nut column (1) and the left and right sides of the bottom end of the threaded hole (4) of the lower nut column (3).

4. A threaded nut post with bevels as defined in claim 1, wherein: The outer side of the top end of the upper nut column (1) and the outer side of the bottom end of the lower nut column (3) are provided with outwardly protruding straight teeth (5).

5. A threaded nut post with bevels as defined in claim 1, wherein: The outer side of the bottom end of the upper nut column (1) and the outer side of the top end of the lower nut column (3) are provided with inwardly arranged bevel teeth (6).

6. A threaded nut post with bevels according to claim 5, characterized in that: The bevel teeth (6) of the upper nut column (1) and the lower nut column (3) are arranged in opposite directions.

7. A threaded nut post with bevels as defined in claim 1, wherein: The size of the tapered boss (7) is one millimeter larger than the size of the tapered cavity (8).

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