Roller type anti-loosening screw and nut

Abstract

The utility model discloses a roller type anti-loosening screw and nut, which relates to the technical field of fasteners and comprises a screw and a first nut, and the screw penetrates into a workpiece; a plurality of slope grooves are continuously formed in one end of the first nut, a deep end and a shallow end are sequentially formed in each slope groove in the anticlockwise direction, the deep ends and the shallow ends of every two adjacent slope grooves abut against each other, a pin roller is arranged in each slope groove, the pin rollers can roll in the slope grooves, and when the first nut is in a tightened state, the pin rollers can roll in the slope grooves. When the pin roller is located at the deep end, the outer end face of the pin roller protrudes out of the end face of the first nut; the structure is simple, operation is convenient, a plurality of slope grooves are continuously formed in one end of the first nut and matched with rolling columns to roll in the slope grooves, a workpiece is firmly abutted against, and looseness is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of fastener technology, specifically relating to a roller-type anti-loosening screw nut. Background Technology

[0002] Threaded connections are currently the most commonly used connection method. One of the advantages of threaded connections over other connections is their disassembly and ease of maintenance. However, this is also their weakness, especially in large mechanical equipment such as trains, automobiles, airplanes, and tanks operating at high speeds and experiencing intense vibrations. Numerous tragic incidents, including rollovers and fatalities, have been caused by loosening, detachment, and fatigue fracture of threaded connections. With the development of machinery towards higher speeds and precision, industrial scale towards large-scale automation, and the advancement of aerospace technology, the problem of preventing loosening of threaded fasteners has become increasingly prominent. Generally, the vibration-resistant loosening life of fasteners is much shorter than the fatigue life of other materials and structures; that is, fasteners often fail long before fatigue fracture. Therefore, continuously considering the problem of preventing loosening of threaded connections has always been a subject of dedicated research. Utility Model Content

[0003] The purpose of this invention is to provide a roller-type anti-loosening screw nut to solve the problem of easy loosening of threaded connection structures in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A roller-type anti-loosening screw nut includes a screw and a first nut, wherein the screw passes through a workpiece; one end of the first nut is continuously provided with multiple inclined grooves, each inclined groove having a deep end and a shallow end in a counterclockwise direction, the deep end and shallow end of two adjacent inclined grooves abutting each other, and a roller is provided in each inclined groove, the roller can roll in the inclined groove, when the first nut is in a tightened state, the roller is located at the deep end, at this time, the outer end face of the roller protrudes from the end face of the first nut.

[0006] Optionally, the first nut has an annular boss at one end near the workpiece. The annular boss is hollow inside, and the inclined groove is located inside the annular boss. The inner diameter of the annular boss is larger than the outer diameter of the first nut.

[0007] Optionally, it may also include a second nut, after the screw passes through the workpiece, the first nut and the second nut are screwed in in sequence; the outer end face of the roller contacts the lower end face of the second nut.

[0008] Optionally, the slope of the inclined trough is 7-15 degrees.

[0009] Optionally, the roller is a tapered roller.

[0010] Optionally, four inclined grooves are provided, and four corresponding rollers are also provided.

[0011] Optionally, the end of the roller near the screw 1 does not contact the screw.

[0012] Optionally, an abutment platform is provided on the first nut near the workpiece end, and the diameter of the abutment platform is larger than the outer diameter of the first nut.

[0013] Optionally, a second abutment platform is provided on one end of the second nut near the roller, the lower end face of the second abutment platform is in contact with the outer end face of the roller, and the diameter of the second abutment platform is larger than the outer diameter of the first nut.

[0014] Beneficial effects: The roller-type anti-loosening screw nut of this utility model has a simple structure and is easy to operate. Multiple inclined grooves are continuously set at one end of the first nut, and the rollers roll in the inclined grooves. When the first nut shows signs of loosening, the first nut will rotate counterclockwise along the rollers. Conversely, the rollers will move from the deep end to the shallow end in the inclined grooves. During the movement of the rollers, the depth of the inclined grooves at the rollers' positions gradually narrows, while the rollers themselves remain unchanged. The rollers firmly hold the workpiece in place, preventing loosening. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention, which describes a roller-type anti-loosening screw nut.

[0016] Figure 2 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention, which describes a roller-type anti-loosening screw nut.

[0017] Figure 3 This is a vertical sectional view of a roller-type anti-loosening screw nut according to the present invention;

[0018] Figure 4 This is a schematic diagram of the overall structure of the first nut in Example 2.

[0019] In the diagram: 1. Screw; 2. First nut; 3. Second nut; 4. Inclined groove; 5. Deep end; 6. Shallow end; 7. Roller; 8. Abutment platform one; 9. Abutment platform; 10. Annular boss. Detailed Implementation

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0021] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0022] In the description of this utility model, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0023] Example 1

[0024] like Figure 1 As shown, this embodiment provides a roller-type anti-loosening screw nut, including a screw 1 and a first nut 2. The screw 1 is inserted into the workpiece. One end of the first nut 2 is continuously provided with a plurality of inclined grooves 4. Each inclined groove 4 is sequentially formed with a deep end 5 and a shallow end 6 in a counterclockwise direction. The deep end 5 and the shallow end 6 of two adjacent inclined grooves 4 abut against each other. Each inclined groove 4 is provided with a roller 7. The roller 7 can roll in the inclined groove 4. When the first nut 2 is in the tightened state, the roller 7 is located at the deep end 5. At this time, the outer end face of the roller 7 protrudes from the end face of the first nut 2.

[0025] For details, see Figure 1The ramp groove 4 is located at the end of the first nut 2 that contacts the workpiece. The ramp groove 4 is formed by a spiral arrangement of ramps. In use, the screw 1 is first inserted into the workpiece, then the roller 7 is placed into the ramp groove 4, and the first nut 2 is tightened. When the first nut 2 is tightened, the roller 7 is located at the deep end 5. At this time, the outer end face of the roller 7 is tightly abutting against the workpiece. When the first nut 2 shows signs of loosening, the first nut 2 will rotate counterclockwise along the roller 7. Conversely, the roller 7 will move from the deep end 5 to the shallow end 6 in the ramp groove 4. During the movement of the roller 7, the depth of the ramp groove 4 at the position of the roller 7 gradually narrows, while the roller 7 itself remains unchanged. The roller 7 will firmly abut the workpiece and the first nut 2 to prevent loosening.

[0026] Further, see Figure 1 The first nut 2 has an annular boss 10 at one end near the workpiece. The annular boss 10 is hollow inside, and the inclined groove 4 is located inside the annular boss 10. The inner diameter of the annular boss 10 is larger than the outer diameter of the first nut 2.

[0027] Specifically, the annular boss 10 has a cylindrical groove at its center, and the inclined groove 4 is set in the cylindrical groove. The diameter of the cylindrical groove is the inner diameter of the annular boss 10. By setting the inner diameter of the annular boss 10 to be larger than the outer diameter of the first nut 2, the width of the inclined groove 4 is larger, the height of the roller 7 is higher, the overall structure is more stable, and the relaxation effect is better.

[0028] Preferably, the slope of the inclined groove 4 is 7-15 degrees.

[0029] If the slope is too low, the fastening effect will be poor; if the slope is too high, the roller 7 will have difficulty rolling along the inclined groove 4.

[0030] Preferably, the roller 7 is a tapered roller; specifically, the end of the roller 7 closer to the screw 1 has a smaller diameter, and the end of the roller 7 further away from the screw 1 has a larger diameter.

[0031] In one embodiment, four inclined grooves 4 are provided, and four corresponding rollers 7 are also provided.

[0032] In one embodiment, the end of the roller 7 near the screw 1 does not contact the screw 1; in order to prevent restriction of the rolling of the roller 7.

[0033] Example 2

[0034] like Figures 2-4 As shown, this embodiment provides a roller-type anti-loosening screw nut, including a screw 1, a first nut 2, and a second nut 3. The screw 1 is inserted into the workpiece, and the first nut 2 and the second nut 3 are screwed in sequentially. See also... Figure 4The inner end face of the first nut 2 near the end of the second nut 3 is provided with a plurality of inclined grooves 4. Each inclined groove 4 is formed with a deep end 5 and a shallow end 6 in a counterclockwise direction. The deep end 5 and the shallow end 6 of two adjacent inclined grooves 4 abut against each other. Each inclined groove 4 is provided with a roller 7. The roller 7 can roll in the inclined groove 4. When the first nut 2 is tightened, the roller 7 is located at the deep end 5. At this time, the outer end face of the roller 7 protrudes from the end face of the first nut 2. The outer end face of the roller 7 is in contact with the lower end face of the second nut 3.

[0035] In practical applications, the first nut 2 and the second nut 3 are two nuts with the same diameter and height. Generally, only the lower end face of the first nut 2 abuts against the workpiece to lock it in place. In this case, the screw 1 is first passed through the workpiece, and the first nut 2 is tightened. Then, the roller 7 is placed in the inclined groove 4. At this time, the roller 7 is located at the deep end 5 of the inclined groove 4. Then, the second nut 3 is tightened so that the lower end face of the second nut 3 contacts the outer end face of the roller 7. When there is any sign of loosening, the second nut 3 rotates counterclockwise, which will drive the roller 7 to roll from the deep end 5 of the inclined groove 4 to the shallow end 6 of the inclined groove 4. The roller 7 holds the first nut 2 and the second nut 3 together to prevent loosening. At this time, the first nut 2 acts as a nut to fasten the workpiece, and the second nut 3 acts as a nut to prevent the first nut 2 from loosening by reversing.

[0036] When it is necessary to loosen the fastener, first unscrew the second nut 3, then remove the roller 7, and then unscrew the first nut 2. The overall structure is simple and easy to install and disassemble.

[0037] Alternatively, the workpiece can be abutted on both the lower end face of the first nut 2 and the upper end face of the second nut 3. The working principle is the same, and will not be described in detail here. However, the distance between the two workpieces is determined by the height of the first nut 2 and the second nut 3. Therefore, the height of the first nut 2 and the second nut 3 can be customized according to specific circumstances. At the same time, the height of the first nut and the second nut can also be customized according to the required preload, so as to ensure the anti-loosening effect and achieve a reasonable configuration of the first nut and the second nut.

[0038] Preferably, the slope of the inclined groove 4 is 7-15 degrees.

[0039] If the slope is too low, the tightening effect between the two nuts will be poor; if the slope is too high, the roller 7 will have difficulty rolling along the inclined groove 4.

[0040] Preferably, the roller 7 is a tapered roller 7; specifically, the end of the roller 7 closer to the screw 1 has a smaller diameter, and the end of the roller 7 farther from the screw 1 has a larger diameter.

[0041] In one embodiment, four inclined grooves 4 are provided, and four corresponding rollers 7 are also provided.

[0042] In one embodiment, the end of the roller 7 near the screw 1 does not contact the screw 1; in order to prevent restriction of the rolling of the roller 7.

[0043] In one implementation, see Figure 3 The first nut 2 has an abutment platform 8 at one end near the workpiece, and the diameter of the abutment platform 8 is larger than the outer diameter of the first nut 2.

[0044] Specifically, the abutment platform 8 is a frustum of an annular shape; the abutment platform 8 increases the contact area between the first nut 2 and the workpiece, resulting in a better anti-loosening effect.

[0045] In one embodiment, the second nut 3 is provided with an abutment platform 9 at one end near the roller 7. The lower end face of the abutment platform 9 contacts the outer end face of the roller 7, and the diameter of the abutment platform 9 is larger than the outer diameter of the first nut 2.

[0046] Specifically, the abutment platform 9 is an annular frustum; the abutment platform 9 can increase the contact area between the second nut 3 and the roller 7, resulting in a better anti-loosening effect.

[0047] In summary, the roller-type anti-loosening screw nut provided in this embodiment has a simple structure and is easy to operate. A ramp groove 4 is provided on the inner wall of the first nut 2, and the roller 7 rolls in the ramp groove 4 to press the first nut 2 and the second nut 3 together, which greatly enhances the locking force between the two nuts and can firmly press the workpiece together to prevent loosening.

[0048] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A roller type anti-loosening screw nut comprising a screw rod (1) and a first nut (2), the screw rod (1) penetrating into a workpiece; characterized in that, The first nut (2) has a plurality of inclined grooves (4) continuously provided at one end. Each inclined groove (4) has a deep end (5) and a shallow end (6) in a counterclockwise direction. The deep end (5) and the shallow end (6) of two adjacent inclined grooves (4) abut against each other. Each inclined groove (4) is provided with a roller (7). The roller (7) can roll in the inclined groove (4). When the first nut (2) is tightened, the roller (7) is located at the deep end (5). At this time, the outer end face of the roller (7) protrudes from the end face of the first nut (2).

2. The roller-type anti-loosening screw nut according to claim 1, characterized in that, The first nut (2) has an annular boss (10) at one end near the workpiece. The annular boss (10) is hollow inside. The inclined groove (4) is located inside the annular boss (10). The inner diameter of the annular boss (10) is larger than the outer diameter of the first nut (2).

3. The roller-type anti-loosening screw nut according to claim 1, characterized in that, It also includes a second nut (3). After the screw (1) is inserted into the workpiece, the first nut (2) and the second nut (3) are screwed in in sequence; the outer end face of the roller (7) is in contact with the lower end face of the second nut (3).

4. A roller-type anti-loosening screw nut according to claim 2 or 3, characterized in that, The slope of the sloping trough (4) is 7-15 degrees.

5. A roller-type anti-loosening screw nut according to claim 4, characterized in that, The roller (7) is a tapered roller.

6. A roller-type anti-loosening screw nut according to claim 4, characterized in that, The inclined groove (4) is provided in four parts, and the corresponding rollers (7) are also provided in four parts.

7. A roller-type anti-loosening screw nut according to claim 4, characterized in that, The end of the roller (7) near the screw (1) does not contact the screw (1).

8. A roller-type anti-loosening screw nut according to claim 3, characterized in that, The first nut (2) has an abutment platform (8) near the workpiece end, and the diameter of the abutment platform (8) is larger than the outer diameter of the first nut (2).

9. A roller-type anti-loosening screw nut according to claim 3, characterized in that, The second nut (3) has an abutment platform (9) at one end near the roller (7). The lower end face of the abutment platform (9) contacts the outer end face of the roller (7), and the diameter of the abutment platform (9) is greater than the outer diameter of the first nut (2).

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