A positioning ring and a torque setting kit

Abstract

The utility model discloses a kind of positioning ring and fixed torque kit, it is related to fastener technical field.The utility model specifically includes ring body and first elastic part, the first elastic part is set to the outside of ring body, the first elastic part is outward protruding towards ring body.The utility model can be set in bolt by ring body, and be positioned in the axial position of bolt by the elastic contraction of ring body itself, then by the first elastic part of the radial direction of ring body from inside to the outside, it is realized to the position positioning of cutout cover, to prevent cutout cover from bolt, because by the cooperation of first elastic part and cutout cover, when assembling, cutout cover can be directly pushed along axial direction, when cutout cover is contacted with first elastic part, first elastic part is deformed, to be clamped into cutout cover inside, simple operation and assembly fast.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, specifically providing a positioning ring and a torque-regulating kit. Background Technology

[0002] Bolts, as fasteners, exhibit varying tightening effects depending on the preload applied. Insufficient preload can cause the bolt to loosen easily. Workers can use a torque wrench to ensure the preload meets requirements; alternatively, they can use bolts with a fixed torque, such as the bolt and nut disclosed in patent CN108006043A, entitled "A Bolt and a Fixed Torque Nut." In this patent, a fixed-pitch nut is connected to a second threaded rod at the top of a nut. Tightening the fixed-pitch nut transmits torque to the second threaded rod via the fixed-torque nut, thus tightening the bolt. Furthermore, the end of the second threaded rod abuts against the vulnerable part of the torque nut. When the bolt's preload meets requirements, the vulnerable part of the torque nut breaks off. The vulnerable part connects to a shielding part, which covers a marking on the second threaded rod, allowing the worker to determine if the bolt's preload meets requirements based on whether the marking is directly observable.

[0003] The function of the torque-controlled nut is to drive the second screw to rotate. In the aforementioned patent, the torque-controlled nut drives the second screw to rotate via a thread. If the second screw is not driven by a thread, the torque-controlled nut risks easily detaching from the top of the second screw. Without a threaded connection, the torque-controlled nut can be defined as a cut-off cap. For example, if the cut-off cap and the second screw are connected via a star-key structure, with the key of the star-key being the vulnerable part, the cut-off cap risks easily detaching from the top of the second screw. During subsequent inspections, it is necessary to check the presence of the cut-off cap to determine if the bolt was tightened using it; by observing whether the markings are directly visible, it can be determined whether the bolt's preload is sufficient. If the cut-off cap detaches from the second screw, it is impossible for workers to determine whether the bolt was tightened using the cut-off cap, nor can they determine whether the bolt has reached the preload. Therefore, even without a threaded connection to the second screw, existing cut-off caps still require structures such as anti-reverse rings to maintain the connection. However, existing anti-reverse rings are mainly used on larger shafts, where the bolt is small and the available space is limited, leading to difficult and cumbersome installation. Utility Model Content

[0004] This invention provides a positioning ring to solve the problems of difficult and cumbersome installation of the cut-off cap.

[0005] The technical solution of this utility model is as follows:

[0006] A positioning ring includes a ring body and a first elastic portion, the first elastic portion being disposed on the outer side of the ring body and protruding outward toward the outer side of the ring body.

[0007] In this design, the positioning ring can be fitted onto the bolt, and the first elastic part on the ring can abut against the cutting cover from the inside. The elastic force of the first elastic part clamps the cutting cover from the inside, thus preventing the cutting cover from detaching from the second screw. Since the cutting cover is abutted against by the first elastic part, when installing the cutting cover, it can be directly pushed along the axial direction to the first elastic part. The first elastic part itself deforms elastically and then locks onto the cutting cover, achieving quick assembly of the positioning ring and the cutting cover. The operation is simple and fast.

[0008] Preferably, to solve the problem of low connection efficiency between the positioning ring and the bolt, the ring body is an elastic ring with a variable diameter.

[0009] In this design, the diameter of the ring is variable, and it can be fixed to the bolt by the elasticity of the ring itself, thereby preventing the positioning ring from moving axially relative to the bolt.

[0010] To reduce the resistance of the positioning ring stuck on the second screw, the ring body is a C-shaped open ring.

[0011] In this design, the ring body is an open ring, which has a larger deformability, making it easier for the ring body to be locked in the designated position of the second screw, thus reducing the difficulty of operation.

[0012] To improve the stability of the force exerted by the positioning ring on the cut-off cap, at least two first elastic parts are included.

[0013] In this design, the more first elastic parts there are, the more fulcrums are provided to the inner side of the cutting cover, which can make the force on the cutting cover more uniform, thereby improving the stability of the cutting cover under force and preventing the cutting cover from shifting position due to uneven force.

[0014] To further improve the uniformity of force on the cut-off cover, each first elastic part is arranged along the circumference of the ring body.

[0015] In this design, each first elastic part is arranged along the circumferential direction, which can make the inner surface of the cut-off cover uniformly stressed.

[0016] The positioning ring is used between the bolt and the cutting cap. During use, it needs to be inserted between the positioning ring and the bolt. The size of the positioning ring needs to be very small in the compressed state to be inserted. However, the size of the positioning ring is very small in the compressed state, so the first elastic part is easily unable to support the positioning cutting cap from the inside due to its small size. In order to solve the problem that the first elastic part has a small deformation range and cannot play a positioning role, the first elastic part is a spring piece. One side of the first elastic part is connected to the ring body, and the first elastic part is inclined relative to the axis of the ring body.

[0017] In this design, the spring is inclined relative to the axis of the ring body, allowing it to deform along the axis of the ring body under stress. This ensures the spring is parallel to the outer side of the ring body in its compressed state, resulting in a sufficiently small positioning ring that can be engaged between the cut-off cap and the bolt. The spring's length can compensate for the required deformation range. Increasing the spring's length ensures that the side furthest from the ring body can abut against the inner side of the cut-off cap, thus increasing the deformation range of the first deformation part. Generally, greater spring deformation results in greater elastic force, and a longer spring results in greater deformation after engagement between the bolt and the cut-off cap. This ensures the spring can contact the inner wall of the cap and provides sufficient elastic force to press against the cut-off cap. As the first elastic part, the spring ensures the positioning ring can engage between the bolt and the cut-off cap, while also ensuring the first deformation part provides sufficient deformation to press against the cut-off cap.

[0018] To address the inconvenience of installing the positioning ring, a second elastic portion is provided on the inner side of the ring body, protruding towards the inner side of the ring body.

[0019] In this design, because the positioning ring abuts against the bolt via the second elastic part, installation simply involves placing the positioning ring onto the bolt and then moving it along the bolt's axial direction to the designated position. During this movement, the second elastic part adapts and deforms, thus preventing the positioning ring from moving along the bolt's axial direction.

[0020] To improve the stability of the position of the locating ring relative to the bolt, at least two second elastic parts are included, each of which is disposed on the inner side of the ring body along the circumferential direction of the ring body.

[0021] In this design, by setting two or more elastic parts to abut the bolt, the contact points between the positioning ring and the bolt are increased. The more contact points there are, the more dispersed the force is, and the more uniform the force from the bolt is applied to the positioning ring, resulting in higher stability.

[0022] To address the issue of insufficient force exerted by the ring on the cutting cap, causing the cutting cap to move axially relative to the positioning ring, an annular groove is typically provided on the inner side of the cutting cap. After the positioning ring is engaged in the annular groove, the end face of the positioning ring abuts against the side of the annular groove, preventing the cutting cap from moving along the axial direction relative to the positioning groove. To address the issue of the positioning ring easily detaching from the annular groove due to the small contact area between the positioning ring and the annular groove, the second elastic part is a spring sheet. One side of the second elastic part is connected to the ring body, and the second elastic part is inclined relative to the axis of the ring body. The first elastic part is a spring sheet, one side of the first elastic part is connected to the ring body, and the first elastic part is inclined relative to the axis of the ring body. The inclination directions of the first elastic part and the second elastic part are opposite.

[0023] In this solution, since the first elastic part and the second elastic part are in opposite directions, the first elastic part can prevent the cutting cap from moving toward the nut direction away from the bolt, while the second elastic part is used to prevent the positioning ring from moving toward the nut direction away from the bolt, thereby achieving the positioning of the positioning ring and the cutting cap.

[0024] Preferably, the first elastic portion and the second elastic portion are spaced apart along the circumferential direction of the ring body.

[0025] In this design, the interval setting can make the force on the ring more even, avoid the ring from tilting, and improve the stability of the ring's position.

[0026] This utility model also provides a constant torque kit, which includes the aforementioned positioning ring and a cutting cap. The cutting cap is provided with a groove for fitting with the first elastic part.

[0027] In this design, when the first elastic part enters the groove, the first elastic part will be constrained by the groove, so that the positioning ring can play the role of positioning the cutting cap.

[0028] The beneficial effects of this utility model are:

[0029] This invention utilizes a ring fitted onto a bolt, with the ring's elastic contraction providing axial positioning. A first elastic portion, extending radially outward from the ring, presses against a cutting cap from the inside, further positioning the cutting cap and preventing it from detaching from the bolt. Because the first elastic portion engages with the cutting cap, during assembly, the cutting cap can be directly pushed along the axial direction. When the cutting cap contacts the first elastic portion, the elastic portion deforms, causing it to snap into place. This design is simple to operate and quick to assemble. Attached Figure Description

[0030] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are 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.

[0031] Figure 1 This is a top view of Embodiment 1;

[0032] Figure 2 This is a schematic diagram of the structure of Example 3;

[0033] Figure 3 This is a schematic diagram of the structure of Example 4;

[0034] Figure 4 This is a top view of Embodiment 4;

[0035] Figure 5 This is an exploded view of the timing ring, bolt, and cut-off cap of this utility model;

[0036] Figure 6 This is a partial cross-sectional view of the periodic ring, bolt, and cut-off cap of this utility model.

[0037] In the above figures, the corresponding reference numerals are as follows:

[0038] 1. Ring body; 2. First elastic part; 3. Second elastic part; 4. Cutting cap; 5. Bolt; 41. Annular groove; 51. Second screw; 52. Nut; 53. Groove. Detailed Implementation

[0039] The technical solution of this utility model will be clearly and completely described in conjunction with the accompanying drawings and through specific embodiments.

[0040] Example 1:

[0041] like Figure 1 As shown, this embodiment provides a positioning ring, including a ring body 1 and a first elastic part 2. The ring body 1 is a circular ring structure supported by an elastic material. The first elastic part 2 is disposed on the outer side of the ring body 1 and protrudes outward in the radial direction of the ring body 1.

[0042] The outer side of the locating ring refers to the outer surface in the radial direction.

[0043] The ring 1 can be an elastic ring supported by rubber, and the diameter of the ring 1 can be changed by the elasticity of the rubber itself. The ring 1 is used to be fitted onto the second screw 51 of the bolt 5.

[0044] like Figure 5 and Figure 6As shown, in this design, the second screw 51 does not need to be threaded; instead, it has a structure adapted to the vulnerable part of the cutting cap 4. For example, if the vulnerable part of the cutting cap 4 is a rod extending radially inward, then the end face of the second screw 51 is provided with an insert block along the axial direction. The insert block is inserted between the rods. When the cutting cap 4 is screwed, the rod connected to the cutting cap 4 pushes the insert block, transmitting rotation to the second screw 51 through the insert block, causing the bolt 5 to rotate. The diameter of the ring 1 is smaller than the diameter of the second screw 51, allowing the ring 1 to be stably fitted onto the side of the second screw 51. After the vulnerable part of the cutting cap 4 is broken, the cutting cap 4 continues to move toward the nut 52, thereby bringing the cutting cap 4 into contact with the first elastic part 2. There is a gap between the inner side of the cutting cover 4 and the second screw 51. The first elastic part 2 is inserted into the gap between the cutting cover 4 and the second screw 51. The first elastic part 2 is in a compressed state when it is between the cutting cover 4 and the second screw 51. The first elastic part 2 abuts against the cutting cover 4 from the inside by its own elastic force to prevent the cutting cover 4 from falling off the second screw 51.

[0045] The first elastic part 2 can be a spring sheet, which is glued to the ring body 1. Alternatively, the first elastic part 2 can be a rubber block integrally formed with the ring body 1. The first elastic part 2 needs to be able to deform in the direction of the side of the second screw 51 so that the positioning ring can be engaged between the cut-off cap 4 and the second screw 51.

[0046] Since the cutter cover 4 will not be used after the vulnerable part is broken, meaning no worker will move it, the first elastic part 2 is used to prevent the cutter cover 4 from being dislodged from the second screw 51 under accidental force. In this case, one first elastic part 2 can be locked from the inside. To improve the stability of the cutter cover 4, two, three, or more first elastic parts 2 can be provided. The more first elastic parts 2 provided, the more contact points the cutter cover 4 will have, making the force on the cutter cover 4 more even and ensuring that the cutter cover 4 remains in place when subjected to forces from various directions, thus improving the stability of the cutter cover 4.

[0047] Each first elastic part 2 is arranged along the circumferential direction of the ring body 1. If the axial length of the ring body 1 is greater than twice the dimension of the first elastic part 2 in the axial direction, then two or more first elastic parts 2 may be arranged along the axial direction of the ring body 1.

[0048] The first elastic part 2 can press against the inner side of the cutting cover 4 with elastic force, and prevent the cutting cover 4 from moving by friction.

[0049] The first elastic part 2 can also be used in another environment. When the inner side of the cutting cover 4 is provided with an annular groove 41, the first elastic part 2 is locked in the annular groove 41. When the cutting cover 4 is about to move along the axial direction, the first elastic part 2 will abut against the side of the annular groove 41 to prevent the cutting cover 4 from moving. Compared with the positioning method of frictional resistance, this locking structure has higher stability.

[0050] It should be noted that when the first elastic part 2 engages with the groove 53 on the cutting cap 4, if the first elastic part 2 is a sheet-like structure with elasticity such as a spring sheet, the sheet-like structure is inclined relative to the axial direction of the second screw 51, and in use, the first elastic part 2 is inclined toward the nut 52, in order to prevent the cutting cap 4 from moving toward the original nut 52.

[0051] Example 2:

[0052] This second embodiment provides a positioning ring. Unlike the first embodiment, the ring body 1 in this second embodiment is a C-shaped open ring.

[0053] The ring body 1 is made of elastic metal or plastic. When the ring body 1 is fitted onto the second screw 51, the opening of the ring body 1 expands, making the diameter of the ring body 1 larger, so that the ring body 1 can be fitted onto the second screw 51 with a larger diameter.

[0054] The first elastic part 2 can be a spring sheet welded to the ring body 1.

[0055] Example 3:

[0056] This third embodiment provides a positioning ring based on the second embodiment, but the first elastic part 2 is different from that in the second embodiment.

[0057] like Figure 2 As shown, the first elastic part 2 is integrally formed with the ring body 1. The first elastic part 2 is a sheet-like structure that is directly cut and processed on the ring body 1, that is, an elastic sheet.

[0058] Example 4:

[0059] This fourth embodiment is an improvement on the technical solution of the second or third embodiment. Unlike the second or third embodiment, this fourth embodiment also provides a second elastic part 3.

[0060] like Figure 3 and Figure 4 As shown, the inner side of the ring body 1 no longer abuts against the second screw 51 of the bolt 5, and the second elastic part 3 is provided on the inner side of the ring body 1, with the second elastic part 3 protruding towards the direction of the second screw 51.

[0061] The environment applicable to this embodiment 4 is that an annular groove 53 is opened on the second screw 51 along the circumferential direction. The second elastic part 3 is stuck in the groove 53. When the ring body 1 is subjected to the axial force, the second elastic part 3 will abut against the side of the groove 53 to prevent the ring body 1 from moving along the axial direction of the second screw 51. This plays a role in positioning the relative position of the positioning ring and the second screw 51, and avoids the positioning ring from moving and causing the cutting cover 4 to move.

[0062] Similarly, the second elastic part 3 can be a spring sheet welded to the ring body 1, or it can be a spring sheet cut and processed from the ring body 1.

[0063] The number of second elastic parts 3 can be one, two, three or more. The more second elastic parts 3 are provided, the more support points there are on the side of the positioning ring and the groove 53, thus improving the stability of the positioning ring.

[0064] The first elastic part 2 is inclined toward the nut 52, and when the second elastic part 3 is a sheet-like structure such as a spring, it is inclined toward the principle nut 52. Its function is to prevent the positioning ring from moving toward the principle nut 52.

[0065] The first elastic part 2 and the second elastic part 3 are spaced apart along the circumferential direction of the ring body 1.

[0066] Example 5:

[0067] This fifth embodiment provides a constant torque assembly, including a cut-off cap 4 and a positioning ring. The positioning ring can be any one of the positioning rings in the technical solutions of Embodiment 1, Embodiment 2, Embodiment 3, or Embodiment 4.

[0068] The positioning ring adopts the positioning ring described in Embodiment 1, Embodiment 2, Embodiment 3, or Embodiment 4.

[0069] The cutting cover 4 is cylindrical in shape, and an annular groove 41 is provided on the inner side of the cutting cover 4. The first elastic part 2 of the positioning ring is located in the annular groove 41.

[0070] The inner surface of the cutting cover 4 is also provided with a vulnerable part, and there is a gap between the annular groove 41 and the vulnerable part in the axial direction of the cutting cover 4. The vulnerable part is connected to a shielding part. The vulnerable part can be a rod provided on the inner surface of the cutting cover 4, and the shielding part is a circular piece connected to the vulnerable part. The circular piece is perpendicular to the axis of the cutting cover 4.

Claims

1. A positioning ring, characterized in that, It includes a ring body (1) and a first elastic part (2), the first elastic part (2) is disposed on the outside of the ring body (1), and the first elastic part (2) protrudes outward toward the outside of the ring body (1).

2. A positioning ring according to claim 1, characterized in that, The ring body (1) is an elastic ring with a variable diameter.

3. A positioning ring according to claim 2, characterized in that, The ring (1) is a C-shaped open ring.

4. A positioning ring according to claim 1, characterized in that, It includes at least two first elastic parts (2), each of which is arranged along the circumferential direction of the ring body (1).

5. A positioning ring according to claim 1, characterized in that, The first elastic part (2) is a spring sheet. One side of the first elastic part (2) is connected to the ring body (1). The first elastic part (2) is inclined relative to the axis of the ring body (1).

6. A positioning ring according to claim 1, characterized in that, The inner side of the ring body (1) is provided with a second elastic part (3), which protrudes towards the inner side of the ring body (1).

7. A positioning ring according to claim 6, characterized in that, It includes at least two second elastic parts (3), each second elastic part (3) being arranged along the circumferential direction of the ring body (1).

8. A positioning ring according to claim 6, characterized in that, The second elastic part (3) is a spring sheet. One side of the second elastic part (3) is connected to the ring body (1). The second elastic part (3) is inclined relative to the axis of the ring body (1). The first elastic part (2) is a spring sheet. One side of the first elastic part (2) is connected to the ring body (1). The first elastic part (2) is inclined relative to the axis of the ring body (1). The first elastic part (2) and the second elastic part (3) are tilted in opposite directions.

9. A positioning ring according to claim 8, characterized in that, The first elastic part (2) and the second elastic part (3) are spaced apart along the circumferential direction of the ring body (1).

10. A constant torque kit, characterized in that, The device includes the positioning ring as described in any one of claims 1-9, and also includes a cutting cap (4) provided with a groove for fitting into the first elastic part (2).

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