A non-slip fastening device with loosening feedback

Abstract

This invention discloses a non-disengaging fastening device with loosening feedback, comprising: a screw (1), a base (2), and a spring (3). In the loosened state, after the internal thread A (7) on the base (2) and the external thread A (10) on the screw (1) are rotated to a predetermined degree, the first positioning surface (4) on the base (2) will contact the fifth positioning surface (11) on the screw (1), causing the screw (1) to be unable to continue rotating. In the tightened state, when the sixth positioning surface (12) of the screw (1) contacts the second positioning surface (5), the spring (3) is compressed, and the upper end surface (8) of the spring (3) is flush with the third positioning surface (6) of the base (2). The spring (3) generates sufficient elastic force to enable the screw (1) to prevent loosening. This invention can provide loosening feedback of the fastening device, allowing the operator to clearly know that the screw has been completely loosened.

Description

Technical Field

[0001] This invention relates to a non-disengaging fastening device, and more particularly to a non-disengaging fastening device with feedback for loosening to the desired position. Background Technology

[0002] Non-detachable fasteners are primarily used in on-orbit installation or removal of equipment requiring space. Since all items in the on-orbit space are in a state of weightlessness, traditional screw fasteners, once loosened, will float in the space and may drift into confined areas, becoming unwanted debris and potentially causing malfunctions in other equipment. Furthermore, during dismantling, operators cannot visually or tactilely determine if the fasteners have loosened. Therefore, traditional fasteners cannot meet the ergonomic design requirements for on-orbit operations.

[0003] Traditional screw fastening typically uses standard screws to secure the connector and the connected parts together. The connector has a smooth hole, while the connected part has a threaded hole. The threaded section of the screw passes through the smooth hole in the connector and is screwed into the threaded hole in the connected part until the screw head presses the connector and the connected part together. When it is necessary to separate the connector and the connected part, the screw must be loosened until the threaded section of the screw completely disengages from the threaded hole of the connected part. At this point, there is no connection between the screw and the connector or other connected parts, and it can freely detach from the smooth hole of the connector under a certain external force. Furthermore, at this point, the screw can continue to rotate in the direction of loosening the thread, making it impossible for the operator to determine whether the threaded section of the screw has completely disengaged from the threaded hole of the connected part. Summary of the Invention

[0004] The purpose of this invention is to provide a non-disengaging fastening device with feedback on loosening, which solves the problem in previous devices where there is no connection between the screw and the connector or other connectors. Under a certain external force, the screw can freely detach from the hole of the connector, and the screw can rotate continuously in the direction of thread loosening. The operator cannot determine whether the threaded section of the screw has completely detached from the threaded hole of the connected part.

[0005] A non-disengaging fastening device with loosening feedback includes: a screw, a base, and a spring.

[0006] The upper part of the screw is the bolt head, below which is a ring, and below that is a stud. The bolt head, ring, and stud are coaxial. The outer surface of the bolt head has an external thread A. The upper surface of the ring is the fifth locating surface, and the lower surface is the sixth locating surface. The lower outer surface of the stud has an external thread B. The base is cylindrical. Inside the base, from top to bottom, are an internal thread A, a large cylindrical cavity, a medium cylindrical cavity, and a small cylindrical cavity. The internal thread A and the external thread A are threaded together. The upper surface of the large cylindrical cavity is the first locating surface, and the lower surface is the second locating surface. The lower surface of the medium cylindrical cavity is the third locating surface. The top of the spring is the upper end face, and the bottom is the lower end face. Both the screw and the spring are placed inside the base. The screw and the base are coaxial. The spring is fitted onto the stud of the screw, with its upper end face contacting the sixth locating surface and its lower end face contacting the third locating surface. The diameters of the large cylindrical cavity, the medium cylindrical cavity, and the small cylindrical cavity decrease sequentially. The diameter of the large cylindrical cavity is greater than the diameter of the screw ring, the diameter of the medium cylindrical cavity is greater than the outer diameter of the spring, and the diameter of the small cylindrical cavity is greater than the diameter of the screw stud.

[0007] Preferably, the screw is placed coaxially with the base and can slide axially within the base.

[0008] Preferably, the spring provides a thrust to the screw along the axial direction.

[0009] Preferably, the first positioning surface is in contact with the fifth positioning surface when the device is loosened.

[0010] Preferably, the second positioning surface is in contact with the sixth positioning surface when the device is in a fastened state.

[0011] Preferably, the internal thread A has countersunk holes at both the upper and lower parts.

[0012] Preferably, in the loosened state without disengaging from the fastening device, after the internal thread A on the base and the external thread A on the screw have rotated to a predetermined degree, the first positioning surface on the base will contact the fifth positioning surface on the screw, causing the screw to be unable to continue rotating.

[0013] Preferably, when the screw is in a tightened state without disengaging from the fastening device, and the sixth locating surface of the screw contacts the second locating surface, the spring is compressed, and the upper end surface of the spring is flush with the third locating surface of the base. The spring generates sufficient elastic force to enable the screw to resist loosening.

[0014] 1. During the loosening process, the external thread A on the screw will engage with the internal thread A on the base. When the screw is fully loosened, the positioning surface of the screw will be tightly fitted with the corresponding positioning surface on the base, so that the screw will not continue to be rotated. Therefore, the operator will receive corresponding loosening feedback.

[0015] Second, when the device of the present invention is in the loosened state, the screw will not come out of the base, so there will be no extra material.

[0016] Third, when the device of the present invention is tightened, the spring will provide sufficient elastic force to prevent the screw from loosening. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the loosened state of a non-disengaging fastening device with feedback on the loosened position.

[0018] Figure 2 This is a schematic diagram of the fastening state of a non-disengaging fastening device with feedback for loosening and positioning.

[0019] Figure 3 This is a schematic diagram of the base.

[0020] Figure 4 This is a schematic diagram of a spring.

[0021] Figure 5 This is a schematic diagram of a screw.

[0022] 1. Screw 2. Base 3. Spring

[0023] 4. First positioning surface 5. Second positioning surface 6. Third positioning surface

[0024] 7. Internal thread A 8. Upper end face 9. Lower end face

[0025] 10. External thread A 11. Fifth locating surface 12. Sixth locating surface

[0026] 13. External thread B Detailed Implementation

[0027] In orbit, all objects are in a state of weightlessness. Therefore, traditional screw fasteners, once loosened, will float in space and may drift into confined areas, becoming unwanted debris and potentially causing malfunctions in other equipment. Furthermore, during dismantling, operators cannot visually or tactilely determine if fasteners have loosened. Therefore, traditional fasteners cannot meet the ergonomic design requirements for on-orbit operations.

[0028] This invention can provide feedback on the loosening of the fastening device, so that the operator can clearly know that the screw has been completely loosened.

[0029] Example 1

[0030] This invention provides a non-detachable fastening device with loosening feedback, which solves the problems of existing fastening devices being prone to floating and unable to provide loosening feedback.

[0031] The non-disengaging fastening device with loosening feedback according to the present invention includes a base 2, a screw 1, and a spring 3; wherein: the screw 1 is disposed in the base 2, is placed coaxially with the base 2, and can slide axially within the base 2.

[0032] Furthermore, a spring 3 is coaxially placed inside the base 2, and the lower end face 9 of the spring 3 contacts the third positioning surface 6 of the base 2, the upper end face 8 of the spring 3 contacts the sixth positioning surface 12 on the screw 1, and the spring 3 provides a thrust to the screw 1 along the axial direction.

[0033] Furthermore, the base 2 is provided with an internal thread A7, which can be rotated in conjunction with the external thread A10 provided on the screw 1.

[0034] Furthermore, when the device is loosened, after the internal thread A7 on the base 2 and the external thread A10 on the screw 1 rotate to a predetermined degree, the first positioning surface 4 on the base 2 will contact the fifth positioning surface 11 on the screw 1, causing the screw 1 to be unable to continue rotating.

[0035] Furthermore, when the device is in a tightened state, and the sixth positioning surface 12 of the screw 1 contacts the second positioning surface 5, the spring 3 is compressed, and the upper end surface 8 of the spring 3 is flush with the third positioning surface 6 of the base 2. The spring 3 generates sufficient elastic force to enable the screw 1 to prevent loosening.

[0036] Example 2

[0037] A non-disengaging fastening device with feedback for loosening and positioning includes: a screw 1, a base 2, and a spring 3.

[0038] The upper part of screw 1 is the bolt head, the lower part of the bolt head is the ring, and the lower part of the ring is the stud. The bolt head, the ring, and the stud are coaxial. The outer surface of the bolt head has an external thread A10. The upper surface of the ring is the fifth positioning surface 11, and the lower surface is the sixth positioning surface 12. The outer surface of the lower part of the stud has an external thread B13.

[0039] The base 2 is cylindrical; the interior of the base 2 consists of an internal thread A7, a large cylindrical cavity, a medium cylindrical cavity, and a small cylindrical cavity from top to bottom; the internal thread A7 is threaded to the external thread A10; there are countersunk holes at the top and bottom of the internal thread A7; the upper surface of the large cylindrical cavity is the first positioning surface 4, and the lower surface is the second positioning surface 5; the lower surface of the medium cylindrical cavity is the third positioning surface 6.

[0040] The top of spring 3 is the upper end face 8, and the bottom is the lower end face 9.

[0041] Both screw 1 and spring 3 are placed inside base 2. Screw 1 and base 2 are coaxial. Spring 3 is fitted onto the stud of screw 1, with its upper end face 8 in contact with the sixth positioning surface 12 and its lower end face 9 in contact with the third positioning surface 6. In the loosened state, the first positioning surface 4 is in contact with the fifth positioning surface 11, and in the tightened state, the second positioning surface 5 is in contact with the sixth positioning surface 12.

[0042] The diameters of the large cylindrical cavity, the medium cylindrical cavity, and the small cylindrical cavity decrease sequentially. The diameter of the large cylindrical cavity is greater than the diameter of the ring of screw 1, the diameter of the medium cylindrical cavity is greater than the outer diameter of spring 3, the diameter of the ring of screw 1 is greater than the diameter of the medium cylindrical cavity, and the diameter of the small cylindrical cavity is greater than the diameter of the stud of screw 1.

Claims

1. A non-disengaging fastening device with feedback for loosening and positioning, characterized in that, include: Screw (1), base (2), and spring (3); The upper part of the screw (1) is the bolt head, the lower part of the bolt head is the ring, and the lower part of the ring is the stud. The bolt head, the ring, and the stud are coaxial. The outer surface of the bolt head has an external thread A (10). The upper surface of the ring is the fifth positioning surface (11), and the lower surface is the sixth positioning surface (12). The lower part of the stud has an external thread B (13). The base (2) is cylindrical. The interior of the base (2) consists of an internal thread A (7), a large cylindrical cavity, a medium cylindrical cavity, and a small cylindrical cavity from top to bottom. The internal thread A (7) and the external thread A (10) are threaded together. The upper surface of the large cylindrical cavity is the first positioning surface (4), and the lower surface is the second positioning surface (5). The medium cylindrical cavity... The lower surface is the third positioning surface (6); the top of the spring (3) is the upper end surface (8), and the bottom is the lower end surface (9); both the screw (1) and the spring (3) are placed inside the base (2); the screw (1) and the base (2) are coaxial; the spring (3) is sleeved on the stud of the screw (1), the upper end surface (8) is in contact with the sixth positioning surface (12), and the lower end surface (9) is in contact with the third positioning surface (6); the diameter of the large cylindrical cavity, the diameter of the medium cylindrical cavity, and the diameter of the small cylindrical cavity decrease in sequence, the diameter of the large cylindrical cavity is greater than the diameter of the screw (1) ring, the diameter of the medium cylindrical cavity is greater than the outer diameter of the spring (3), and the diameter of the small cylindrical cavity is greater than the diameter of the screw (1) stud; When the screw is loosened without disengaging from the fastening device, after the internal thread A (7) on the base (2) and the external thread A (10) on the screw (1) rotate to a predetermined degree, the first positioning surface (4) on the base (2) will contact the fifth positioning surface (11) on the screw (1), causing the screw (1) to be unable to continue rotating.

2. The non-disengaging fastening device with loosening feedback according to claim 1, characterized in that, The screw (1) is placed coaxially with the base (2) and can slide axially within the base (2).

3. A non-disengaging fastening device with loosening feedback according to claim 2, characterized in that, The spring (3) provides thrust to the screw (1) along the axial direction.

4. A non-disengaging fastening device with loosening feedback as described in claim 1, characterized in that, When the device is loosened, the first positioning surface (4) is in contact with the fifth positioning surface (11).

5. A non-disengaging fastening device with loosening feedback according to claim 1, characterized in that, When the device is in a fastened state, the second positioning surface (5) is in contact with the sixth positioning surface (12).

6. A non-disengaging fastening device with loosening feedback according to claim 1, characterized in that, The internal thread A(7) has countersunk holes at both the upper and lower parts.

7. A non-disengaging fastening device with loosening feedback according to any one of claims 1 to 6, characterized in that, When the screw (1) is in a fastened state without coming out of the fastening device, and the sixth positioning surface (12) of the screw (1) contacts the second positioning surface (5), the spring (3) is compressed, and the upper end surface (8) of the spring (3) is flush with the second positioning surface (5) of the base (2); the spring (3) generates sufficient elastic force to enable the screw (1) to have anti-loosening ability.

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