TWI890118B - Manufacturing and construction method of anti-loosening assembly having reverse self-tapping screw - Google Patents

Abstract

An anti-loosening assembly having a reverse self-tapping screw comprises a reverse self-tapping screw and an anti-loosening assembly that can be locked on to the reverse self-tapping screw. The reverse self-tapping screw is composed of a screw head and a screw rod. The screw rod is divided into a thread tapping section and a fastening section, wherein the thread tapping section is a portion of the screw rod close to the screw head and having a tapered surface with reverse self-tapping thread; the fastening section is setup on the screw rod of the opposite end to the screw head; the fastening section has clockwise threads. The anti-fastening assembly is composed of a locking piece and an anti-loosening hook piece. The locking piece has a threaded through hole where the screw rod can screw through, a locking section, and an anti-loosening section, wherein the anti-loosening section has a tapered groove with a circular oblique-angled slot; the tapered groove has a circular groove thereon; the anti-loosening hook piece is locked to the circular groove to achieve the optimal tightness of the anti-loosening assembly.

Description

Manufacturing and construction method of reverse self-tapping screws and anti-loosening components

The present invention relates to a screw and an anti-loosening assembly; more specifically, it relates to the manufacturing and installation methods of a reverse self-tapping screw and an anti-loosening assembly.

It is common knowledge that when screws and fasteners are used to secure objects, they must be installed on both sides simultaneously, which makes installation quite inconvenient in many locations.

It is also known that locking hardware can easily loosen due to vibration if it is not reinforced with anti-loosening measures.

In light of this, the creators of this project, drawing on their many years of experience in related research and development, conducted in-depth research into the aforementioned deficiencies and actively sought solutions based on the aforementioned needs. After a long period of diligent research and numerous tests, they finally completed this creation.

The primary objective of this invention is to provide a method for manufacturing and installing a reverse tapping screw and an anti-loosening assembly. This method makes the reverse tapping screw extremely convenient for fastening. The reverse tapping screw's tapping section generates a reverse thrust force for single-sided installation. Furthermore, the anti-loosening section of the anti-loosening assembly, in conjunction with the anti-loosening fastener, creates a locking thread to prevent loosening, thereby enhancing safety.

To achieve the above-mentioned objectives, the present invention is a reverse self-tapping screw and an anti-loosening assembly, which comprises a reverse self-tapping screw and an anti-loosening assembly.

The reverse tapping screw consists of a head and a screw shaft. The screw shaft can be divided into a tapping section and a locking section. The tapping section is the portion of the screw shaft near the head and is equipped with a reverse tapping thread. The length of the tapping section can be d/4 to d/3, and the reverse tapping thread in the tapping section has a 1.5×d/16 withdrawal surface. The locking section is located on the screw shaft opposite the head and is a forward thread.

The aforementioned reverse self-tapping screw and anti-loosening assembly utilizes a high-frequency heat treatment hardening method for the tapping section of the screw to achieve a high-strength self-tapping thread, facilitating its application in a wider range of applications.

The anti-loosening assembly consists of a locking piece and an anti-loosening fastener. The locking piece is provided with a screw hole through which it passes and is threaded with a screw rod, a locking section, and an anti-loosening section. The anti-loosening section is provided with an annular beveled contraction groove. The contraction groove has an inclination angle α of 30° to 60°. The contraction groove is also provided with an annular groove into which the anti-loosening fastener is snapped, thereby achieving a tighter fit for the anti-loosening assembly.

In the aforementioned reverse tapping screw and anti-loosening assembly, the anti-loosening section of the locking device can be shrunk by heat treatment and forging to form a shrinkage groove structure. The anti-loosening section shrinks by d/32, and the diameter after shrinkage is d-d/16. This allows the anti-loosening section to form an overfit with the reverse tapping screw, thereby achieving an optimal tight fit for the locking device.

The installation method with reverse self-tapping screws and anti-loosening components is completed through the following steps:

A. Drilling Steps: Drill a hole in the object to be secured with a diameter of d+d/16, slightly larger than the diameter of the screw.

B. Pre-assembly step: After inserting the reverse tapping screw into the previously drilled hole, screw the tapping end of the screw into the object to be secured. This will pre-lock the reverse tapping screw to the object in a reverse threaded manner.

C. Installation Step: Thread the locking fastener onto the pre-assembled locking section of the screw on the object to be secured. Since the reverse tapping screw body utilizes the reverse tapping threads on the self-tapping section to lock onto the object to be secured, this installation step can be performed from one side. The reverse threads of the tapping section of the reverse tapping screw lock onto the object to be secured, generating a reverse thrust force to achieve single-sided installation.

D. Fixing Step: Install the anti-loosening fastener into the annular groove of the locking piece that has been screwed into the screw to achieve the best possible fit of the anti-loosening assembly.

In summary, the advantages of the present invention are:

1. When securing an object, the reverse tapping screw of the present invention utilizes its own tapping section, which features reverse tapping threads, to pre-lock the screw in the object. This allows for single-sided installation, facilitating subsequent installation steps. Because the reverse tapping screw body utilizes the reverse tapping threads on its own tapping section to lock the object, installation can be performed from a single side, utilizing the reverse thrust generated by the reverse threads of the tapping section locking the screw in the object.

2. The anti-loosening assembly of the present invention is composed of a locking piece and an anti-loosening fastener. The locking piece is provided with a screw hole through which the locking piece passes and can be screwed with a screw rod, a locking section, and an anti-loosening section. The anti-loosening section is provided with a shrinkage groove with an annular bevel slot. The shrinkage groove has an inclination angle α of 30° to 60°. An annular groove is provided on the shrinkage groove. The annular groove can be The anti-loosening fastener is snapped into place. Furthermore, the anti-loosening section of the locking piece can be shrunk by heat treatment and forging to form a shrinkage groove structure. The anti-loosening section shrinks by d/32, and the diameter after shrinkage is d-d/16. This allows the anti-loosening section to form an overfit with the locking section of the reverse self-tapping screw, thereby achieving an optimal seal for the anti-loosening assembly.

1: With reverse self-tapping screws and anti-loosening assembly

10: Reverse self-tapping screws

100:Screw head

101: Screw

1010: Tapping Section

1011: Locking section

11: Anti-loosening assembly

111: Lock Firmware

1110: Locking section

1111: Anti-loosening section

11110: Contraction slot

α: Contraction groove angle

11111: Annular groove

112: Anti-loosening fasteners

2: Object to be secured

A.: Drilling Steps

B.: Pre-assembly steps

C.: Installation steps

D.: Fixed steps

d: Screw diameter

Figure 1: Schematic diagram of the structure of a preferred embodiment of the present invention; Figure 2: Exploded view of the components of the reverse self-tapping screw and the anti-loosening assembly of the present invention; Figure 3: Schematic diagram of the reverse self-tapping screw component of the present invention; Figure 4: Schematic diagram of the anti-loosening assembly of the present invention; Figure 5: Schematic diagram of the heat treatment shrinkage of the locking fixture of the present invention; Figure 6: Step diagram of the construction method of the present invention; Figure 7: Schematic diagram of the drilling step of the preferred embodiment of the present invention; Figure 8: Schematic diagram of a reverse tapping screw being inserted into an object to be secured, according to a preferred embodiment of the present invention; Figure 9: Schematic diagram of a reverse tapping screw being inserted and about to be tapped, according to a preferred embodiment of the present invention; Figure 10: Schematic diagram of a reverse tapping screw being inserted and tapped, according to a preferred embodiment of the present invention; Figure 11: Schematic diagram of a locking member being inserted, according to a preferred embodiment of the present invention; Figure 12: Schematic diagram of a locking fastener being inserted, according to a preferred embodiment of the present invention;

In order to provide a more detailed understanding of the purpose, efficacy, features and structure of the present invention, preferred embodiments are described below with accompanying drawings.

First, please refer to Figures 1, 2, and 3. Figure 1 is a schematic diagram of the structure of a preferred embodiment of the present invention. Figure 2 is an exploded view of the components of the reverse self-tapping screw and anti-loosening assembly of the present invention. Figure 3 is a schematic diagram of the reverse self-tapping screw component of the present invention.

As shown in Figures 1, 2, and 3, the present invention is a reverse tapping screw and anti-loosening assembly 1, which comprises a reverse tapping screw 10 and an anti-loosening assembly 11.

The reverse tapping screw 10 consists of a head 100 and a shaft 101. The shaft 101 can be divided into a tapping section 1010 and a locking section 1011. The tapping section 1010, which is the portion of the shaft 101 near the head 100, is provided with a reverse tapping thread. The length of the tapping section 1010 can range from d/4 to d/3, and the reverse tapping thread of the tapping section 1010 has a 1.5 x d/16 withdrawal surface. The locking section 1011 is located on the shaft 101 opposite the head 100 and is a forward thread.

The anti-loosening assembly 11 is composed of a locking member 111 and an anti-loosening fastener 112.

In the aforementioned reverse self-tapping screw and anti-loosening assembly 1, the tapping section 1010 of the screw 101 can be processed using high-frequency heat treatment hardening to achieve a high-strength self-tapping thread, facilitating application in a wider range of fields.

The construction method with the reverse self-tapping screw and the anti-loosening assembly 1 is completed through the following steps:

Please refer to Figure 7 in comparison with Figure 6. Figure 7 is a schematic diagram of the drilling step of a preferred embodiment of the present invention.

A. Drilling Step A: Drill a hole in the object to be secured (2) with a diameter of d+d/16, slightly larger than the diameter of the screw.

Please refer to Figures 8, 9, and 10 in conjunction with Figure 6. Figure 8 illustrates the reverse tapping screw of a preferred embodiment of the present invention being inserted into an object to be secured. Figure 9 illustrates the reverse tapping screw of a preferred embodiment of the present invention being inserted and tapping. Figure 10 illustrates the reverse tapping screw of a preferred embodiment of the present invention being inserted and tapping completed.

B. Pre-assembly Step B.: After inserting the reverse tapping screw 10 into the previously drilled hole, screw the tapping section 1010 of the screw 101 into the object 2 to be secured. This will pre-lock the reverse tapping screw 10 to the object 2 in a reverse threaded manner.

Please refer to Figure 11 in comparison with Figure 6. Figure 11 is a schematic diagram of the locking firmware of a preferred embodiment of the present invention.

C. Installation Step C.: Thread the locking member 111 onto the locking section 1011 of the screw 101 pre-assembled on the object to be secured. Since the reverse tapping screw 10 is secured to the object 2 by the reverse tapping threads on the self-tapping section 1010, installation Step C. can be performed from one side. The reverse threads of the tapping section 1010 of the reverse tapping screw 10 are locked to the object 2, generating a reverse thrust force to achieve single-sided installation.

Please refer to Figure 12 in conjunction with Figure 6. Figure 12 is a schematic diagram of the insertion of the anti-loosening fastener according to a preferred embodiment of the present invention.

D. Fixing Step D: Install the anti-loosening fastener 112 into the annular groove 11111 of the locking member 111 that has been screwed into the screw.

In summary, when the reverse tapping screw 10 of the present invention is used to lock the object 2, the tapping section 1010 with the reverse tapping thread can be used to pre-lock the reverse tapping screw 10 on the object 2 in the pre-assembly step B., and the reverse tapping screw 10 can be pre-locked on the object 2 in the pre-assembly step C., and the reverse tapping screw 10 can be constructed on one side, which is convenient for the subsequent installation step C. The reverse self-tapping thread on segment 1010 is locked to the object 2 to be secured. Therefore, the installation step C. of the locking member 111 of the anti-loosening assembly 11 can be performed from a single side. The reverse thread of the tapping segment 1010 of the reverse self-tapping screw 10, locked to the object 2, generates a reverse thrust, thereby achieving the single-sided installation of the locking member 111 of the anti-loosening assembly 11.

Please refer to Figures 1, 2, and 4. Figure 1 is a schematic diagram of the structure of a preferred embodiment of the present invention. Figure 2 is an exploded view of the components of the present invention with reverse self-tapping screws and anti-loosening assembly. Figure 4 is a schematic diagram of the anti-loosening assembly of the present invention.

As shown in Figures 1, 2, and 4, the present invention is a reverse tapping screw and anti-loosening assembly 1, which includes a reverse tapping screw 10 and an anti-loosening assembly 11.

The reverse self-tapping screw 10 is composed of a screw head 100 and a screw rod 101. The screw rod can be divided into a tapping section 1010 and a locking section 1011.

The anti-loosening assembly 11 consists of a locking member 111 and an anti-loosening fastener 112. The locking member 111 is provided with a screw hole through which it passes and is threadedly engaged with the screw 101, a locking section 1110, and an anti-loosening section 1111. The anti-loosening section 1111 is provided with an annular, angled, contraction groove 11110. The contraction groove has an inclination angle α of 30° to 60°. The contraction groove is also provided with an annular groove 11111 into which the anti-loosening fastener 112 is snapped, thereby achieving an optimal seal for the anti-loosening assembly.

Please refer to Figure 5, which is a schematic diagram of the heat treatment shrinkage of the locking fixture of the present invention.

In the aforementioned reverse tapping screw and anti-loosening assembly 1, the anti-loosening section 1111 of the locking member 111 can be shrunk by heat treatment and forging to form a contraction groove 11110. The contraction amount of the anti-loosening section 1111 is d/32, and the diameter of the contracted anti-loosening section 1111 is d-d/16. This allows the anti-loosening section 1111 to form an overfit with the reverse tapping screw 10, thereby achieving an optimal tight fit for the locking member.

The construction method with the reverse self-tapping screw and the anti-loosening assembly 1 is completed through the following steps:

Please refer to Figure 7 in comparison with Figure 6. Figure 7 is a schematic diagram of the drilling step of a preferred embodiment of the present invention.

A. Drilling Step A: Drill a hole on the object to be secured (2) with a diameter of d+d/16, slightly larger than the diameter of the screw.

Please continue to refer to Figures 8, 9, and 10 and compare them with Figure 6. Figure 8 is a schematic diagram of the reverse self-tapping screw of the preferred embodiment of the present invention being inserted into the object to be locked. Figure 9 is a schematic diagram of the reverse self-tapping screw of the preferred embodiment of the present invention being inserted and tapping. Figure 10 is a schematic diagram of the reverse self-tapping screw of the preferred embodiment of the present invention being inserted and tapping completed.

B. Pre-assembly Step B.: Insert the reverse tapping screw 10 into the previously drilled hole, then screw the tapping section 1010 of the screw 101 into the object 2 to be secured.

Please refer to Figure 11 in comparison with Figure 6. Figure 11 is a schematic diagram of the locking firmware of a preferred embodiment of the present invention.

C. Installation Step C.: Thread the locking member 111 onto the locking section 1011 of the screw 101 pre-assembled on the object to be secured. Since the reverse tapping screw 10 is secured to the object 2 by the reverse tapping threads on the self-tapping section 1010, installation Step C. can be performed on the other side.

Please refer to Figure 12 in conjunction with Figure 6. Figure 12 is a schematic diagram of the insertion of the anti-loosening fastener according to a preferred embodiment of the present invention.

D. Fixing Step D: Install the anti-loosening fastener 112 into the annular groove 11111 of the locking member 111 that has been screwed into the screw, thereby achieving the optimal fit of the anti-loosening assembly.

In summary, the anti-loosening assembly 11 of the present invention is composed of a locking member 111 and an anti-loosening fastener 112. The locking member 111 is provided with a screw hole through which the locking member 111 is passed and can be screwed with a screw rod, a locking section 1110, and an anti-loosening section 1111. The anti-loosening section 1111 is provided with an annular beveled shrinkage groove 11110. The shrinkage groove has an inclination angle α of 30° to 60°. An annular groove 11111 is provided on the shrinkage groove. The annular groove 11111 is provided with an annular beveled shrinkage groove 11110. 11 allows the anti-loosening fastener 112 to be snapped into place. Furthermore, the anti-loosening section 1111 of the locking member 111 can be shrunk by annealing and forging to form a contraction groove 11110. The contraction amount of the anti-loosening section 1111 is d/32, and the contracted diameter of the anti-loosening section 1111 is d-d/16. This allows the anti-loosening section 1111 to overfit with the locking section 1011 of the reverse self-tapping screw 10, thereby achieving an optimal seal for the anti-loosening assembly 11.

In summary, the advantages of the present invention are:

1. Single-sided locking of reverse tapping screws: This invention utilizes the tapping section on the reverse tapping screw's shaft to pre-tap and lock the reverse tapping screw directly to the object being locked. This makes installation more convenient and eliminates the traditional problem of requiring simultaneous two-sided locking.

2. Single-sided locking of the anti-loosening assembly: This invention utilizes the aforementioned reverse self-tapping screws for locking onto the object to be locked. This allows for single-sided locking of the anti-loosening assembly, making installation more convenient and eliminating the traditional problem of requiring simultaneous two-sided screw locking.

3. Achieve anti-loosening effect: The anti-loosening section of the locking device of the present invention can be shrunk by heat treatment and forging. The shrinkage of the anti-loosening section is d/32, and the diameter of the anti-loosening section after shrinkage is d-d/16, so that the anti-loosening section and the above-mentioned reverse self-tapping screw locking section form an overfit, thereby achieving the best tight fit of the locking device. The anti-loosening section of the locking fixture is provided with an angled contraction groove. The contraction groove has an inclination angle α of 30° to 60°. During locking, the angled slot structure provides a reverse-engaging characteristic to achieve an anti-loosening effect. The anti-loosening fastener is installed into the annular groove of the anti-loosening section of the locking fixture, which has been screwed into the screw, thereby achieving an optimal tight fit of the anti-loosening assembly.

Therefore, this invention represents an excellent advancement and is highly practical compared to similar products. Furthermore, after thoroughly researching domestic and international technical literature on similar structures, we have found no identical or similar structures prior to the filing of this application. Therefore, this application meets the patent requirements of "inventive step," "suitability for industrial application," and "advanced technology." Therefore, we hereby file this application in accordance with the law.

However, the above description is only a preferred embodiment of the present invention. Any other equivalent structural changes made by applying the present invention description and patent application scope should be included in the patent application scope of the present invention.

1: Reverse tapping screw and anti-loosening assembly 2: Object to be secured 10: Reverse tapping screw 11: Anti-loosening assembly 111: Locking element 112: Anti-loosening fastener

Claims (6)

A combination of a reverse tapping screw and an anti-loosening assembly comprises a reverse tapping screw and an anti-loosening assembly. The reverse tapping screw comprises a head and a screw shaft. The screw shaft can be divided into a tapping section and a locking section. The tapping section is the portion of the screw shaft near the head and is provided with a reverse tapping thread. The tapping section can have a length of d/4 to d/3, and the reverse tapping thread of the tapping section has a 1.5 x d/16 withdrawal surface. The locking section is provided on the screw shaft opposite the head and is a forward thread. The anti-loosening assembly is composed of a locking piece and an anti-loosening fastener. The locking piece is provided with a screw hole that passes through it and can be screwed with a screw rod. As described in claim 1, the combination of a reverse self-tapping screw and an anti-loosening component, wherein the tapping section of the screw is processed by high-frequency heat treatment hardening. A construction method utilizing the combination of a reverse tapping screw and an anti-loosening assembly as described in claim 1 is performed through the following steps: A. Drilling step: Drilling a hole in the object to be secured, having a diameter of d + d/16, slightly larger than the diameter of the screw; B. Pre-assembly step: Inserting the reverse tapping screw into the drilled hole, then screwing the tapping section of the screw into the object to be secured, thereby pre-locking the reverse tapping screw to the object to be secured in a reverse threaded manner; C. Installation Step: Thread the locking fastener onto the pre-assembled locking section of the screw on the object to be secured. Since the reverse tapping screw body utilizes the reverse tapping threads on the self-tapping section to lock onto the object to be secured, this installation step can be performed from one side. The reverse threads of the tapping section of the reverse tapping screw lock onto the object to be secured, generating a reverse thrust force. D. Securing Step: Install the anti-loosening fastener into the annular groove of the locking fastener already threaded into the screw. A combination of a reverse tapping screw and an anti-loosening assembly includes the reverse tapping screw and the anti-loosening assembly. The reverse tapping screw comprises a screw head and a screw shaft, wherein the screw shaft can be divided into a tapping section and a locking section. The anti-loosening assembly consists of a locking piece and an anti-loosening fastener. The locking piece is provided with a screw hole through which it passes and is threaded with a screw rod, a locking section, and an anti-loosening section. The anti-loosening section is provided with an annular beveled contraction groove. The contraction groove can be inclined at an angle of 30° to 60°. The contraction groove is also provided with an annular groove into which the anti-loosening fastener is snapped, thereby achieving an optimal seal for the anti-loosening assembly. As described in claim 4, the combination of a reverse self-tapping screw and an anti-loosening assembly, wherein the anti-loosening section of the locking device can be shrunk by heat treatment and forging to form a shrinkage groove structure of the anti-loosening section, the shrinkage amount of the anti-loosening section being d/32, and the diameter of the anti-loosening section after shrinkage being d-d/16, so that this anti-loosening section and the locking section of the reverse self-tapping screw form an overfit, thereby achieving an optimal tight fit of the locking device. A construction method utilizing the combination of a reverse tapping screw and an anti-loosening assembly as described in claim 4 is performed through the following steps: A. Drilling step: Drilling a hole in the object to be secured, having a diameter (d + d/16) slightly larger than the diameter of the screw; B. Pre-assembly step: Inserting the reverse tapping screw into the hole, then screwing the tapping section of the screw into the object to be secured; C. Installation step: Threading the locking fixture onto the locking section of the screw pre-assembled on the object to be secured. Simultaneously, because the reverse tapping screw body is locked to the object to be secured using its own tapping section, the installation step can be performed from a single side; D. Fixing steps: Install the anti-loosening fastener into the annular groove of the anti-loosening section of the locking piece that has been screwed into the screw to achieve the best possible fit of the anti-loosening assembly.