Self-adapting torque thread connection anti-loosening mechanism for signal light spindle

Abstract

This invention discloses an adaptive torque threaded connection anti-loosening mechanism for a traffic light spindle, comprising a lamp holder body, a signal sign body, a spindle seat body, a lower spindle body, an upper spindle body, and a tower-shaped spring. The beneficial effects of this invention are: during assembly and tightening, the lower section of the lower spindle rotates relative to the inner circumferential wall of the spindle seat, forming an adaptive torque threaded connection. The tightening torque is adaptively constant and no longer increases, protecting the threaded connection from failure due to excessive tightening torque.

Description

Technical Field

[0001] This invention relates to traffic lights, and more particularly to a mechanism for preventing loosening of the spindle-driven threaded connection in traffic lights. Background Technology

[0002] In aircraft, ships, and other control panels, the two spindle sections in the signal lights are prone to loosening. Summary of the Invention

[0003] The present invention aims to solve the problems in the prior art by providing a novel anti-loosening mechanism for the spindle adaptive torque threaded connection in a signal light.

[0004] To achieve this objective, the technical solution of the present invention is as follows: A signal light spindle adaptive torque threaded connection anti-loosening mechanism, comprising,

[0005] The lamp holder body has a lamp holder peripheral wall and the lamp holder peripheral wall defines a lamp holder internal space that runs vertically through the lamp holder. The inner peripheral surface of the lamp holder peripheral wall forms an upper lamp holder groove and a lower lamp holder groove. The inner peripheral surface of the lamp holder peripheral wall also forms a lamp holder shoulder, which is located between the upper lamp holder groove and the lower lamp holder groove.

[0006] The main body of the signal sign is arranged in the lower part of the built-in space of the lamp holder and is positioned by the lower groove of the lamp holder;

[0007] The mandrel seat body is arranged in the upper part of the built-in space of the lamp holder. The mandrel seat body has an inner peripheral wall, an outer peripheral wall, and a mandrel seat connecting wall between the inner peripheral wall and the outer peripheral wall. The outer peripheral wall is placed on the shoulder of the lamp holder. A mandrel seat hook corresponding to the upper groove of the lamp holder is formed on the outer peripheral surface of the outer peripheral wall. The mandrel seat hook engages with the upper groove of the lamp holder.

[0008] The lower mandrel body extends vertically and has an upper section, a middle section, and a lower section. The upper section is a threaded section. The middle and lower sections are located inside the inner peripheral wall of the mandrel seat and are engaged with the shaft hole of the inner peripheral wall of the mandrel seat. The lower section has a D-shaped cross-section.

[0009] An upper mandrel body extending vertically, the upper mandrel body having an upper mandrel section and a lower mandrel section, the bottom surface of the lower mandrel section forming an upper mandrel blind hole, the upper mandrel section extending upward into the upper mandrel blind hole and the two being threadedly engaged, the outer peripheral surface of the upper mandrel section forming an upper mandrel shoulder; and, and,

[0010] A tower-shaped spring extends vertically, with the top surface of the tower-shaped spring being smaller than the bottom surface. The top surface of the tower-shaped spring abuts against the bottom surface of the upper mandrel shoulder, and the bottom surface of the tower-shaped spring abuts against the top surface of the mandrel seat connecting wall. The tower-shaped spring is in a compressed state.

[0011] As a preferred embodiment of the adaptive torque threaded connection anti-loosening mechanism for the mandrel in a signal light, the middle section of the lower mandrel is a smooth round shaft.

[0012] As a preferred embodiment of the adaptive torque threaded connection anti-loosening mechanism for the mandrel in a traffic light, the middle section of the lower mandrel is a stepped round shaft.

[0013] As a preferred embodiment of the adaptive torque threaded connection anti-loosening mechanism for the mandrel in a signal light, a limiting washer is provided between the top surface of the tower-shaped spring and the bottom surface of the upper mandrel shoulder.

[0014] As a preferred embodiment of the adaptive torque threaded connection anti-loosening mechanism for the mandrel in a traffic light, the lamp holder body, the signal sign body, and the mandrel seat body are all made of plastic materials, while the lower mandrel body and the upper mandrel body are both made of rigid materials.

[0015] Compared with the prior art, the beneficial effects of the present invention are at least as follows: (1) During the assembly and tightening process, the lower section of the lower mandrel and the inner circumferential wall of the mandrel seat rotate relative to each other, forming an adaptive torque threaded connection. The tightening torque is adaptively constant and no longer increases, protecting the threaded connection threads from failure due to excessive tightening torque. (2) During the operation, the lower section of the lower mandrel and the inner circumferential wall of the mandrel seat can rotate relative to each other. The torque generated by the threaded connection between the upper section of the lower mandrel and the lower section of the upper mandrel is greater than the frictional force of the relative circumferential rotation between the lower section of the lower mandrel and the inner circumferential wall of the mandrel seat. Without the action of external force, the lower mandrel body and the upper mandrel body will never rotate relative to each other, thereby effectively preventing the loosening of the threaded connection between the lower mandrel body and the upper mandrel body. (3) The structure of this mechanism is ingeniously and compactly designed, which can both protect the threaded connection threads and effectively prevent the threaded connection from loosening. The function is reliable and effective.

[0016] In addition to the technical problems solved by the present invention, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems that the present invention can solve, other technical features contained in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a front view of the structure of the lower mandrel body in this invention.

[0019] Figure 3 This is a top view of the structure of the lower mandrel body in this invention.

[0020] Figure 4 This is a front view of the upper mandrel body in this invention.

[0021] Figure 5 This is a top view of the upper mandrel body in this invention. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that these descriptions are for the purpose of aiding understanding the invention and do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

[0023] Please see Figures 1 to 5 The figure shows the adaptive torque threaded connection anti-loosening mechanism of the mandrel in the signal light, which can be used in the operation control panel of aircraft, ships, etc.

[0024] The anti-loosening mechanism is mainly composed of components such as lamp holder body 1, signal sign body 2, spindle seat body 3, lower spindle body 4, upper spindle body 5, and tower-shaped spring 6.

[0025] The lamp holder body 1 has a lamp holder peripheral wall 10, which defines a vertically penetrating internal space. An upper lamp holder groove 101 and a lower lamp holder groove 102 are formed on the inner circumferential surface of the lamp holder peripheral wall 10. A lamp holder shoulder 103 is also formed on the inner circumferential surface of the lamp holder peripheral wall 10. The lamp holder shoulder 103 is located between the upper lamp holder groove 101 and the lower lamp holder groove 102.

[0026] The sign body 2 is arranged in the lower part of the built-in space of the lamp holder and is positioned by the lower groove 102 of the lamp holder, that is, the outer edge of the sign body 2 extends into the interior of the lower groove 102 of the lamp holder. The above structure can be realized by hot pressing or injection molding.

[0027] The mandrel seat body 3 is arranged in the upper part of the built-in space of the lamp holder. The mandrel seat body 3 has an inner peripheral wall 31, an outer peripheral wall 32, and a mandrel seat connecting wall 33 between the inner peripheral wall 31 and the outer peripheral wall 32. The outer peripheral wall 32 is located above the shoulder 103 of the lamp holder. The bottom surface of the outer peripheral wall 32 abuts against the top surface of the shoulder 103 of the lamp holder. The outer peripheral surface of the outer peripheral wall 32 has a mandrel seat hook 321 corresponding to the upper groove 101 of the lamp holder. The mandrel seat hook 321 engages with the upper groove 101 of the lamp holder, so that the mandrel seat body 3 is fixedly connected to the lamp holder body 1.

[0028] The lower mandrel body 4 extends vertically. The lower mandrel body 4 has an upper section 41, a middle section 42, and a lower section 43. The upper section 41 is a threaded section. The middle section 42 and the lower section 43 are both located inside the inner peripheral wall 31 of the mandrel seat and are calibrated with the inner peripheral wall 31 of the mandrel seat. The middle section 42 can be a smooth round shaft or a stepped round shaft. The lower section 43 has a D-shaped cross-section, meaning that a quarter-circle edge is cut off from a thin circular plate to form a single-sided anti-rotation mechanism.

[0029] The upper mandrel body 5 extends vertically. The upper mandrel body 5 has an upper mandrel section 51 and a lower mandrel section 52. A blind hole is formed on the bottom surface of the lower mandrel section 52. The upper lower mandrel section 41 extends upward into the blind hole and the two are threaded together. A shoulder 511 is formed on the outer circumferential surface of the upper mandrel section 51. The shoulder 511 is positioned above the mandrel seat connecting wall 33. The outer circumferential surface of the lower mandrel section 52 has a surface for clamping pliers or similar tools. The lower mandrel section 52 consists of one-sixth of the circular edge cut off from opposite sides of a thin circular boss to form double-sided anti-rotation.

[0030] The tower-shaped spring 6 extends vertically. The tower-shaped spring 6 is smaller at the top and larger at the bottom. The top surface of the tower-shaped spring 6 abuts against the bottom surface of the upper mandrel shoulder 511. Preferably, a limiting washer 7 is provided between the top surface of the tower-shaped spring 6 and the bottom surface of the upper mandrel shoulder 511. The bottom surface of the tower-shaped spring 6 abuts against the top surface of the mandrel seat connecting wall 33. When the tower-shaped spring 6 is in a compressed state, the upper mandrel body 5 drives the lower mandrel body 4 to push against the mandrel seat connecting wall 33.

[0031] The lamp holder body 1, the signal sign body 2, and the spindle seat body 3 are all made of plastic materials. The lower spindle body 4 and the upper spindle body 5 are both made of rigid materials.

[0032] Assembly process of the anti-loosening mechanism:

[0033] Assemble the mandrel seat body 3 and the lower mandrel body 4: During the injection molding of the left mandrel body, the lower mandrel body 4 is used as an insert.

[0034] Assemble the limiting washer 7 (if any), the tower spring 6 and the lower mandrel body 4: encircle the limiting washer 7 (if any) and the tower spring 6 around the inner peripheral wall 31 of the mandrel seat.

[0035] Assemble the lower mandrel body 4 and the upper mandrel body 5: Connect the upper section 41 of the lower mandrel to the lower section 52 of the upper mandrel, clamp the lower section 52 of the upper mandrel, and rotate it circumferentially to complete the screw connection between the upper section 41 and the lower section 52 of the upper mandrel. If the rotational torque increases to a threshold value, the unilateral anti-rotation mechanism formed by the lower section 43 of the lower mandrel fails. If the rotational torque is further increased, the lower section 43 of the lower mandrel rotates relative to the inner peripheral wall 31 of the mandrel seat, thereby making the rotational torque adaptively constant and no longer increasing, protecting the threaded fit between the upper section 41 of the lower mandrel and the lower section 52 from failure due to excessive rotational torque.

[0036] Assemble the mandrel body 3 and the lamp holder body 1: Place the mandrel body 3 on the lamp holder shoulder 103 and engage the mandrel hook 321 with the upper groove 101 of the lamp holder, thereby fixing the mandrel body 3 and the lamp holder body 1.

[0037] During assembly, the lower mandrel body 4 and the mandrel seat body 3 can rotate relative to each other in the circumferential direction. The torque generated by the threaded connection between the lower mandrel body 4 and the upper mandrel body 5 is greater than the circumferential relative rotational friction between the lower section 43 of the lower mandrel and the inner circumferential wall of the mandrel seat. Without external force, the upper mandrel body 5 and the lower mandrel body 4 will never rotate relative to each other, thus effectively preventing the threads of the upper mandrel body 5 and the lower mandrel body 4 from loosening and failing.

[0038] The above description merely illustrates embodiments of the present invention and is quite specific and detailed; however, it should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this invention should be determined by the appended claims.

Claims

1. A self-adaptive torque threaded connection anti-loosening mechanism for the spindle of a traffic light, characterized in that, Includes, The lamp holder body has a lamp holder peripheral wall and the lamp holder peripheral wall defines a lamp holder internal space that runs vertically through the lamp holder. The inner peripheral surface of the lamp holder peripheral wall forms an upper lamp holder groove and a lower lamp holder groove. The inner peripheral surface of the lamp holder peripheral wall also forms a lamp holder shoulder, which is located between the upper lamp holder groove and the lower lamp holder groove. The main body of the signal sign is arranged in the lower part of the built-in space of the lamp holder and is positioned by the lower groove of the lamp holder; The mandrel seat body is arranged in the upper part of the built-in space of the lamp holder. The mandrel seat body has an inner peripheral wall, an outer peripheral wall, and a mandrel seat connecting wall between the inner peripheral wall and the outer peripheral wall. The outer peripheral wall is placed on the shoulder of the lamp holder. A mandrel seat hook corresponding to the upper groove of the lamp holder is formed on the outer peripheral surface of the outer peripheral wall. The mandrel seat hook engages with the upper groove of the lamp holder. The lower mandrel body extends vertically and has an upper section, a middle section, and a lower section. The upper section is a threaded section. The middle and lower sections are located inside the inner peripheral wall of the mandrel seat and are engaged with the shaft hole of the inner peripheral wall of the mandrel seat. The lower section has a D-shaped cross-section. An upper mandrel body extending vertically, the upper mandrel body having an upper mandrel section and a lower mandrel section, the bottom surface of the lower mandrel section forming an upper mandrel blind hole, the upper mandrel section extending upward into the upper mandrel blind hole and the two being threadedly engaged, and the outer peripheral surface of the upper mandrel section forming an upper mandrel shoulder; and... A tower-shaped spring extends vertically, with the top surface of the tower-shaped spring being smaller than the bottom surface. The top surface of the tower-shaped spring abuts against the bottom surface of the upper mandrel shoulder, and the bottom surface of the tower-shaped spring abuts against the top surface of the mandrel seat connecting wall. The tower-shaped spring is in a compressed state.

2. The adaptive torque threaded connection anti-loosening mechanism for the mandrel in a signal light according to claim 1, characterized in that, The middle section of the lower mandrel is a smooth circular shaft.

3. The adaptive torque threaded connection anti-loosening mechanism for the mandrel in a signal light according to claim 1, characterized in that, The middle section of the lower mandrel is a stepped circular shaft.

4. The adaptive torque threaded connection anti-loosening mechanism for the mandrel in a signal light according to claim 1, characterized in that, A limiting washer is provided between the top surface of the tower-shaped spring and the bottom surface of the upper mandrel shoulder.

5. The adaptive torque threaded connection anti-loosening mechanism for the mandrel in a signal light according to claim 1, characterized in that, The lamp holder body, the signal sign body, and the spindle seat body are all made of plastic materials, while the lower spindle body and the upper spindle body are both made of rigid materials.

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