TWI820859B - Eccentric anti-loosening screw manufacturing and construction method - Google Patents

Abstract

An eccentric anti-loosening screw comprises a screw and an anti-loosening assembly that can be screwed and locked thereby, wherein the anti-loosening assembly is composed of two identical locking pieces that are symmetric to the x-axis. The locking piece has a threaded hole, which is a through hole and can be screwed by a screw, and a tapered face; the attaching section of the locking piece has at least one solder joint thereon. The advantages of the present invention are that, when the tapered faces of the locking pieces are attached closely to each other to form the anti-loosening assembly, these two locking pieces have a gap reserved therebetween and are temporarily retained by spot welding. The angle of the gap opening is between 0~120 degrees of a central angle. During a locking and fixing process, rotate the anti-loosening assembly until the object is locked and fixed, followed by solely rotating the outermost locking piece until the solder joint breaks in order to form eccentric force which produces the anti-loosening effect. Therefore, the present invention meets the key requirements of “novelty” and “non-obviousness” for patentability.

Description

Manufacturing and construction method of eccentric locking screws Law

The present invention relates to an anti-loosening screw, and more specifically, to a manufacturing and construction method of an eccentric anti-loosening screw.

Generally, when screws and nuts are locked to an object, if the object is stationary, the screws are unlikely to loosen. On the contrary, if they are locked to an object that needs to run for a long time and vibrates, the movement of the object will cause The vibration will be transmitted to the screws, causing the screws to vibrate and greatly increasing the chance of the screws loosening.

Many applications that require screws will produce a large amount of vibration, such as: cars, water pumps, locomotives, buildings, construction, etc., especially in high-speed trains. Due to the vibration caused by high-speed travel, the screws will loosen and cause problems. Endangering driving safety.

The inventor of this case was granted the Republic of China Patent No. I746350 "Eccentric anti-loosening screw with pull-out surface and its construction method." This patent uses adhesive to apply on two locking components, and then uses a locking tool to lock the two locking components at the same time. It is installed on the screw, and then the outermost locking member is rotated clockwise alone, and finally the positioning pin is driven into the gap between the two locking members, so that the present invention can securely lock the object to be fixed and generate maximum friction. Strength without loosening.

After the above-mentioned patent was applied for a period of time, the inventor of this case developed a brand-new production method and construction method of fasteners based on his many years of mechanical-related research experience with the purpose of preventing loosening due to vibration.

In view of this, I have conducted in-depth discussions on the above-mentioned deficiencies based on my many years of research and development experience in related fields, and actively sought solutions based on the above-mentioned needs. After a long period of hard research and multiple tests, I finally completed the present invention.

The main purpose of the present invention is to provide an improved structure of an eccentric screw and its forming and construction method, so that the eccentric screw is very convenient for locking, and the eccentric force generated by the anti-loosening component can be used to prevent the screw from loosening, and improve the efficiency of use. safety.

In order to achieve the above purpose, the improved structure of the eccentric anti-loosening screw of the present invention includes a screw and an anti-loosening component;

The screw is composed of a screw head and a screw rod connected to the screw head and provided with a male thread;

The anti-loosening component can be locked on the screw, and it is composed of at least two identical and up-and-down symmetrical fasteners. The fastener is provided with a screw hole and a withdrawal surface that penetrate it and can be screwed with the screw. , and the withdrawal surface coincides with the axis of the screw hole, and the thread in the screw hole also extends outward to the side of the withdrawal surface;

According to this, when the pull-out surfaces of the locking parts fit together to form an anti-loosening component, a gap will be reserved between the two locking parts, and spot welding is used to form solder joints for temporary fixation. When locking, the anti-loosening component is rotated After locking the object, rotate the outermost fastener separately until the solder joint breaks to form an eccentric force, and then apply the eccentric force to prevent loosening.

The forming and construction methods of the improved structure of eccentric locking screws are achieved through the following steps:

A. Drilling steps: Drill holes in the center of the polygonal cylinder. The drilled hole diameter is suitable for the corresponding size of the pitch circle diameter of the male thread of the screw;

B. Cutting step: Cut the cylinder by using a withdrawal angle to make a circular cut in the middle section of the cylinder to form a withdrawal surface. The withdrawal angle needs to be greater than the pitch of the screw, so that the cylinder forms a mutually separated Fasteners; or use a withdrawal angle to make a circular cut at an appropriate location on the edge of the column to form a withdrawal surface. The withdrawal angle needs to be greater than the pitch of the screw, so that the column forms a single fastener;

C. Fixing step: Use the withdrawal surface of the two locking parts to fit and rotate each other to create a reserved gap between the two locking parts, and perform spot welding at the appropriate position to form a solder joint. The solder joint should be at least For more than one lock, temporarily fix the two locks;

D. Tapping step: Tap the drilled holes of the two temporarily fixed fasteners to form screw holes. At this point, the two fasteners form an anti-loosening component for screwing onto the screw.

E. Construction steps: Place the screws in the object that needs to be locked, then screw the anti-loosening component onto the screw, and then use the locking tool to turn the second locking member clockwise so that the anti-loosening component locks the object. Then continue to use the locking tool to rotate the second locking piece in a clockwise direction until the solder joint breaks and the gap expands, causing an eccentric force to be generated at the joint between the first locking piece and the second locking piece, thereby using the eccentric force to prevent loosening. The effect.

To sum up, when locking an object in the present invention, the screw is placed in the hole of the object, and the anti-loosening component is screwed into the screw rod for locking. After the locking is completed, the locking member further away from the screw head is Perform strong twisting to cause the solder joint to break, the gap between the two fasteners to expand and generate an eccentric force, and then use the eccentric force to prevent loosening.

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

Please refer to Figures 1 and 2. Figure 1 is a schematic structural diagram of a preferred embodiment of the present invention, and Figure 2 is a schematic structural diagram of a fastener according to a preferred embodiment of the present invention.

As shown in Figures 1 and 2, the improved structure of the eccentric anti-loosening screw of the present invention includes a screw 11 and an anti-loosening component 12;

The screw 11 is composed of a screw head 111 and a screw rod 112 connected with the screw head 111 and provided with a male thread;

The anti-loosening component 12 can be locked on the screw rod 112, and is composed of at least two identical and up-and-down symmetrical locking parts 121. The locking parts 121 are provided with threads that penetrate through them and can be screwed together with the screw rod 112. hole 1211 and withdrawal surface 1212, and the withdrawal surface 1212 coincides with the axis of the screw hole 1211, and the thread in the screw hole 1211 also extends outward to the side of the withdrawal surface 1212;

Accordingly, when the pull-out surfaces 1212 of the fasteners 121 are attached to each other to form the anti-loosening component 12, a gap 1213 will be reserved between the two fasteners 121 and spot welding will be used to perform the welding point 3, so that the fasteners 121 are temporarily fixed. , when locking, rotate the anti-loosening component 12 until the object is locked, and then separately rotate the outermost locking member 121 until the solder joint 3 breaks to form an eccentric force, and then apply the eccentric force to achieve the effect of preventing loosening.

Among them, the opening angle of the gap 1213 reserved between the two locking parts 121 is between 0 and 120 degrees from the center of the circle. Within this angle, the locking parts 121 can be fully fitted and used for rotation. , there will be no interlocking phenomenon.

Among them, there are at least one welding point 3. The more welding points 3 are, the stronger the fixation between the two fasteners 121 is. A larger twisting force is required to break the welding point 3.

The manufacturing and construction method of eccentric locking screws is through the following steps:

Please refer to Figure 4 and compare it with Figure 3. Figure 4 is a schematic diagram (1) of the molding state of the preferred embodiment of the present invention.

A. Drilling step 21: As shown in Figure 4, drill the center of the polygonal cylinder 211. The drilled hole diameter is suitable for the corresponding size of the pitch circle diameter of the male thread of the screw 112; wherein, the polygonal cylinder 211 It can be a hexagonal, quadrilateral, circular, etc. cylinder 211 in various styles.

Please refer to Figure 5, Figure 6, Figure 7 and compare it with Figure 3. Figure 5 is a schematic diagram of the molding aspect (2) of the preferred embodiment of the present invention. Figure 6 is a schematic diagram of the molding aspect (Third) of the preferred embodiment of the present invention. ), Figure 7 is a schematic diagram (4) of the molding state of the preferred embodiment of the present invention.

B. Cutting step 22: Cut the cylinder 211 by using a withdrawal angle to cut an annular shape in the middle section of the cylinder 211 to form a withdrawal surface 1212. The withdrawal angle H needs to be greater than the pitch P of the screw 112, so that The cylinder forms two mutually separated fasteners 121, as shown in Figures 5 and 7; or a withdrawal angle is used to perform annular cutting at an appropriate position on the edge of the cylinder 211 to form a withdrawal surface 1212. The withdrawal angle H needs to be Greater than the pitch P of the screw 112, the cylinder 211 forms a single fastener 121, as shown in Figures 6 and 7; wherein the cutting of the cylinder 211 can be accomplished by wire cutting, cutting machine, laser cutting, etc. Processing of fastener 121.

Please refer to FIG. 8 and FIG. 9 compared with FIG. 3. FIG. 8 is a schematic diagram (5) of the molding aspect of the preferred embodiment of the present invention, and FIG. 9 is a schematic diagram (6) of the molding aspect of the preferred embodiment of the present invention.

C. Fixing step 23: As shown in Figure 7 and Figure 8, use the pull-out surface 1212 of the two locking parts 121 to fit and rotate each other, so that a reserved gap 1213 is generated between the two locking parts 121, and there is a gap between the two locking parts 121. Spot welding is performed at appropriate locations to form at least one solder point 3 to temporarily fix the two fasteners 121; wherein, the opening angle of the gap 1213 reserved for the two fasteners 121 is calculated from the center of the circle. Between 0 and 120 degrees.

Please refer to Figure 10 and Figure 11 compared with Figure 3. Figure 10 is a schematic diagram of the molding aspect (seven) of the preferred embodiment of the present invention, and Figure 11 is a schematic diagram of the molding aspect (eight) of the preferred embodiment of the present invention.

D. Tapping step 24: As shown in Figure 10 and Figure 11, tap the drilled holes of the two temporarily fixed fasteners 121 to form screw holes 1211. At this point, the two fasteners 121 form the anti-loosening component 12 and can be used Threaded on the screw 112.

Please refer to Figure 12 and Figure 13 compared with Figure 3. Figure 11 is an installation schematic diagram (1) of the preferred embodiment of the present invention. Figure 12 is an installation schematic diagram (2) of the preferred embodiment of the present invention. Figures 11 and 12 are The first locking part 121A and the second locking part 121B are both the same locking part 121, and they are distinguished for better detailed description of the present invention.

E. Construction step 25: As shown in Figures 12 and 13, place the screw 11 in the object that needs to be locked, then screw the anti-loosening component 12 onto the screw 11, and then use the locking tool 4 to turn the first screw in a clockwise direction. Second locking member 121B, at this time, the anti-loosening component 12 rotates forward together until the anti-loosing component 12 locks the object, and then continues to use the locking tool 4 to rotate the second locking member 121B in a clockwise direction until the solder joint 3 breaks. The gap 1213 is enlarged, causing an eccentric force to be generated at the joint between the first locking member 121A and the second locking member 121B, and the eccentric force can be used to prevent loosening.

To sum up, when locking an object in the present invention, the screw 11 is placed in the object, and the anti-loosening component 12 is screwed into the screw rod 112 using the locking tool 4 for locking. After the locking is completed, the second The fastener 121B is twisted using the locking tool 4, causing the solder joint 3 to break, and the gap 1213 between the two fasteners 121 to expand and generate an eccentric force, thereby using the eccentric force to prevent loosening.

Please refer to Figures 14 and 15 compared with Figures 12 and 13. Figure 14 is a schematic diagram of the locking tool according to the preferred embodiment of the present invention, and Figure 15 is a schematic cross-sectional view of the locking tool according to the preferred embodiment of the present invention.

In addition, the locking tool 4 used in the construction step 25 is composed of a connecting piece 41 for connecting a hand-held electric tool, a movable sleeve 42 that can move on the connecting piece 41, and a movable sleeve located on the surface of the connecting piece 41 and used for fixing the movable sleeve. The movable sleeve 42 is composed of a positioning bead 43 at the position of the barrel 42. The movable sleeve 42 is provided with a groove 421 corresponding to the appearance of the locking member 121. The depth of the groove 421 is sufficient to accommodate the thickness of the two locking members 121.

In the construction step 25, the locking tool 4 will push the movable sleeve 42 of the fastener 121 forward so that the depth of the groove 421 can completely accommodate the two fasteners 121. In addition, the subsequent fixing step will The movable sleeve 42 of the locking tool 4 is pulled back, and the depth of its groove 421 is only enough to accommodate a single locking piece 121, and a receiving hole 411 is reserved to allow the screw rod 112 to have an extended length.

The advantages of the present invention are:

1. Achieve the effect of preventing loosening: The withdrawal angle of the present invention is larger than the pitch of the screw, which can provide strong locking and prevent loosening. Therefore, the anti-loosening component is used to lock layer by layer, locking first The object is then fixed with a fastener, and then the pull-out surface is used to form an eccentric force to prevent the fastener from loosening, thus achieving the anti-loosening effect.

2. More convenient operation: In the molding method of the present invention, the tapping step is the last operation, so the female threads between the fasteners can be consistent, so the locking will be simpler, and only need The anti-loosening component is screw-locked, so there is no problem that the fastener needs to be locked separately.

3. Reduce production costs: the conventional technology requires the use of more than two different locking parts to achieve the effect of preventing loosening during locking, but the conventional technology requires the production of different models before it can be applied; the present invention uses the same locking part. The mutual cooperation of the withdrawal angle and the screw pitch can achieve the effect of preventing loosening, so a single model can be used for production, which greatly reduces production costs.

Therefore, the present invention has excellent progress and practicability among similar products. At the same time, after searching domestic and foreign technical documents on this type of structure, it is true that no identical or similar structure existed before the application of this case. Therefore, this case It should meet the patent requirements of "inventiveness," "industrial applicability," and "progressivity," and the application must be filed in accordance with the law.

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

11:Screws

111: screw head

112:Screw

12: Anti-loosening component

121:Lock firmware

121A: First lock firmware

121B:Second lock firmware

1211:Screw hole

1212:Remove the noodles

1213:Gap

21: Drilling steps

22: Cutting steps

23: Fixed steps

24:Tapping steps

25:Construction steps

3: Solder joint

H: withdrawal angle

P: pitch

4: Lock setting tools

41: Connector

411: Accommodation hole

42:movable sleeve

421: Groove

43: Positioning beads

Figure 1: Structural diagram of a preferred embodiment of the present invention. Figure 2: A schematic structural diagram of a locking member according to a preferred embodiment of the present invention. Figure 3: Molding step diagram of the preferred embodiment of the present invention. Figure 4: Schematic diagram of the molding state (1) of the preferred embodiment of the present invention. Figure 5: Schematic diagram of the molding state (2) of the preferred embodiment of the present invention. Figure 6: Schematic diagram (3) of the molding state of the preferred embodiment of the present invention. Figure 7: Schematic diagram (4) of the molding state of the preferred embodiment of the present invention. Figure 8: Schematic diagram (5) of the molding state of the preferred embodiment of the present invention. Figure 9: Schematic diagram of the molding state (6) of the preferred embodiment of the present invention. Figure 10: Schematic diagram of the molding state (7) of the preferred embodiment of the present invention. Figure 11: Schematic diagram of the molding state (8) of the preferred embodiment of the present invention. Figure 12: Installation diagram (1) of the preferred embodiment of the present invention. Figure 13: Installation diagram (2) of the preferred embodiment of the present invention. Figure 14: Schematic diagram of the locking tool according to the preferred embodiment of the present invention. Figure 15: A schematic cross-sectional view of the locking tool according to the preferred embodiment of the present invention.

without.

11:Screws

111: screw head

112:Screw

12: Anti-loosening component

121:Lock firmware

1213:Gap

Claims (5)

An eccentric anti-loosening screw includes a screw and an anti-loosening component; the screw is composed of a screw head and a screw rod connected to the screw head and provided with a male thread; the anti-loosening component can be locked to the screw rod It consists of at least two identical and vertically symmetrical fasteners. The fastener is provided with a drilled hole of a corresponding size to the pitch circle diameter of the male thread of the screw, and the hole is penetrated through the joint between the fastener and the screw. The screw hole and the withdrawal surface, and the withdrawal surface coincides with the axis of the screw hole, and the threads in the screw hole also extend outward to the side of the withdrawal surface; accordingly, when the withdrawal surface of the fastener When joining together to form an anti-loosening component, a gap will be reserved between the two fasteners, and spot welding will be used to form solder joints for temporary fixation. When locking, the anti-loosening component will be rotated until the object is locked, and then the final locking components will be locked separately. The outer locking piece rotates until the solder joint breaks to form an eccentric force, and then the eccentric force is applied to prevent loosening. The eccentric locking screw as described in claim 1, wherein the opening angle of the gap reserved between the two fasteners is between 0 and 120 degrees from the center of the circle. The eccentric locking screw as described in claim 1, wherein there is at least one welding point. A manufacturing and construction method for the eccentric locking screw described in manufacturing claim 1 is achieved through the following steps: A. Drilling step: Drill the center of the polygonal cylinder, and the drilled hole diameter is suitable for the screw. Corresponding size of the pitch circle diameter of the male thread; B. Cutting steps: Cut the cylinder. The withdrawal angle is used to make a circular cut in the middle section of the cylinder to form a withdrawal surface. The withdrawal angle needs to be greater than the screw. The thread pitch is so that the column forms separate fasteners; or the withdrawal angle is used to cut annularly at an appropriate place on the edge of the column to form a withdrawal surface. The withdrawal angle needs to be greater than the pitch (P) of the screw, so that the column The whole body forms a single fastener; C. Fixing step: use the pull-out surfaces to fit and rotate the two fasteners to create a reserved gap between the two fasteners, and perform spot welding at the appropriate places where the two fasteners fit together. There should be at least one solder joint to temporarily fix the two fasteners; D. Tapping step: tap the drilled holes of the two temporarily fixed fasteners to form a screw hole. At this point, the two fasteners are formed. The anti-loosening component is used to screw on the screw; E. Construction steps: Place the screw in the object that needs to be locked, then screw the anti-loosing component onto the screw, and then use the locking tool to turn the second lock clockwise. firmware, so that the anti-loosening component locks the object, and then continue to use the locking tool to turn the first locking tool clockwise. The two locking parts until the solder joint breaks and the gap expands, causing an eccentric force to be generated at the joint between the first locking part and the second locking part, and then the eccentric force can be used to prevent loosening. The manufacturing and construction method of eccentric locking screws as described in claim 4, wherein in the fixing step, the opening angle of the reserved gap between the two fasteners is between 0 and 120 degrees from the center of the circle.