Thread anti-loosening structure and workpiece

Abstract

The utility model discloses a thread anti-loosening structure and a workpiece, and relates to the field of anti-loosening nuts. The thread anti-loosening structure comprises a screw, a forward-screwing nut and a reverse-screwing nut, the outer wall of the middle of the screw is connected with the forward-screwing nut through forward threads, one end of the screw shrinks inwards to form a reducing section, reverse threads opposite to the forward threads in direction are arranged on the outer wall of the reducing section, and the reverse-screwing nut is connected with the reverse threads through threads. And the end part of the backward-screwing nut is propped against the end part of the forward-screwing nut. According to the thread anti-loosening structure and the workpiece, the end, away from the nut, of the screw rod shrinks inwards to form the variable-diameter section, the outer wall of the middle of the screw rod and the outer wall of the variable-diameter section are connected with the forward-rotating nut and the reverse-rotating nut through the forward thread and the reverse thread correspondingly, and the ends of the forward-rotating nut and the reverse-rotating nut abut against each other, so that the anti-vibration and anti-loosening functions are achieved; the device has the advantages of being convenient to disassemble and suitable for various working environments.

Description

Technical Field

[0001] The present application relates to the field of anti-loosening nuts, and in particular to a thread anti-loosening structure and a workpiece. Background Art

[0002] Threaded connections are common mechanical connections, widely used in various workpieces due to their reliability, connection stability, and low processing costs. However, existing threaded connections are susceptible to loosening due to mechanical forces in environments with mechanical vibration and shock, affecting their long-term use.

[0003] Existing measures to prevent thread loosening generally include: 1. Installing elastic washers to ensure that the nuts are under pressure, generating friction torque under pressure to prevent the nuts from loosening. However, elastic washers are easily damaged and lose their anti-loosening ability after long-term use; 2. Using punches to destroy the thread pair relationship. This method is suitable for disposable thread pairs that do not need to be disassembled, but it is inconvenient to maintain when used in threaded structures that need to be disassembled; 3. Using thread glue to prevent loosening. Thread glue will also age and loosen under long-term vibration environment.

[0004] Therefore, a thread anti-loosening structure that can be used for a long time in a mechanical vibration and impact environment is needed. Utility Model Content

[0005] The purpose of the present application is to provide a thread anti-loosening structure and a workpiece, which have the advantages of being vibration-resistant and anti-loosening, easy to disassemble, and adaptable to various working environments.

[0006] This application is implemented as follows:

[0007] The present application provides a thread anti-loosening structure, which includes a screw, a forward-rotating nut and a reverse-rotating nut. The middle outer wall of the screw is connected to the forward-rotating nut through a forward thread. One end of the screw contracts inward to form a reducing section. The outer wall of the reducing section is provided with a reverse thread in the opposite direction to the forward thread. The reverse-rotating nut is connected to the reverse thread through a thread, and the end of the reverse-rotating nut presses against the end of the forward-rotating nut.

[0008] In some optional embodiments, a flat washer is further sleeved on the screw rod, and the end of the flat washer presses against the end of the forward-rotating nut away from the reverse-rotating nut.

[0009] In some optional embodiments, at least one pin is further included, the flat washer is provided with at least one first socket penetrating through its two end faces, and the end face of the forward-rotating nut away from the reverse-rotating nut is provided with a second socket corresponding one-to-one to the first socket, and the pin is used to pass through the first socket and then be engaged in the corresponding second socket.

[0010] In some optional embodiments, at least one bayonet is further included, the outer wall of the screw is provided with a slot for engaging the bayonet, the outer wall of the bayonet is provided with a receiving slot connected to the bottom thereof, and when the bottom of the bayonet is engaged with the slot, the pin is inserted away from one end of the forward-rotating nut and moves along the receiving slot.

[0011] In some optional embodiments, it also includes a double-ended pin in the shape of ], the end face of the screw with a reducing section and the end face of the reverse-rotation nut away from the forward-rotation nut are respectively provided with a screw slot and a nut slot, and the two ends of the double-ended pin are respectively clamped in the screw slot and the nut slot.

[0012] In some optional embodiments, a first elastic washer is sleeved on the diameter-reducing section, and the first elastic washer presses against the inner wall of the forward-rotating nut and the end face of the reverse-rotating nut respectively.

[0013] In some optional embodiments, a second elastic washer is sleeved on the middle portion of the screw rod, with two ends respectively pressing against a flat washer and a forward-spinning nut.

[0014] In some optional embodiments, the forward thread is a coarse thread or a fine thread, and / or the reverse thread is a coarse thread or a fine thread.

[0015] In some optional embodiments, a nut is provided at one end of the screw away from the reducing section.

[0016] The present application also provides a workpiece, which includes the above-mentioned thread anti-loosening structure.

[0017] The beneficial effects of the present application are as follows: the thread anti-loosening structure provided by the present application includes a screw, a forward-rotating nut and a reverse-rotating nut, the middle outer wall of the screw is connected to the forward-rotating nut through a forward thread, one end of the screw shrinks inward to form a diameter-reducing section, the outer wall of the diameter-reducing section is provided with a reverse thread opposite to the direction of the forward thread, the reverse-rotating nut is connected to the reverse thread through a thread, and the end of the reverse-rotating nut presses against the end of the forward-rotating nut. The thread anti-loosening structure and workpiece provided by the present application realize the function of anti-vibration and anti-loosening by shrinking one end of the screw inward to form a diameter-reducing section, and the middle outer wall of the screw and the outer wall of the diameter-reducing section are connected with a forward-rotating nut and a reverse-rotating nut whose ends press against each other through forward thread and reverse thread respectively, and have the advantages of being easy to disassemble and adaptable to various working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0019] Figure 1A schematic cross-sectional view of the thread anti-loosening structure provided in Example 1 of the present application;

[0020] Figure 2 This is a schematic cross-sectional view of the screw in the thread anti-loosening structure provided in Example 1 of the present application;

[0021] Figure 3 A schematic cross-sectional view of a thread anti-loosening structure provided in Example 2 of the present application;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the thread anti-loosening structure provided in Example 3 of the present application.

[0023] In the figure: 100, screw; 110, nut; 120, forward-rotating nut; 130, reverse-rotating nut; 140, forward thread; 150, reducing section; 160, reverse thread; 170, flat washer; 180, latch; 190, first insertion hole; 200, second insertion hole; 210, latch; 220, slot; 230, receiving slot; 240, double-headed pin; 250, screw slot; 260, nut slot; 270, first elastic washer; 280, second elastic washer. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0029] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0030] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] The following is a further detailed description of the thread anti-loosening structure and the features and performance of the workpiece of the present application in conjunction with the embodiments.

[0032] Example 1

[0033] like Figure 1 and Figure 2As shown, an embodiment of the present application provides a thread anti-loosening structure, which includes a screw 100 with a nut 110 at one end, a forward-rotating nut 120, a reverse-rotating nut 130 and a flat washer 170 sleeved on the screw 100. The middle outer wall of the screw 100 is connected to the forward-rotating nut 120 through a forward thread 140, and the end of the screw 100 away from the nut 110 shrinks inward to form a reducing section 150. The outer wall of the reducing section 150 is provided with a reverse thread 160 in the opposite direction of the forward thread 140. The reverse-rotating nut 130 is connected to the reverse thread 160 through a thread, and the end of the reverse-rotating nut 130 presses against the end of the forward-rotating nut 120, and the end of the flat washer 170 presses against the end of the forward-rotating nut 120 away from the reverse-rotating nut 130; in this embodiment, the nut 110 is a hexagonal nut, and the forward thread 140 and the reverse thread 160 are coarse threads.

[0034] The thread anti-loosening structure provided in the embodiment of the present application is achieved by connecting the forward-rotating nut 120 through a forward thread 140 on the outer wall in the middle of the screw 100, providing an inwardly contracted reducing section 150 at the end of the screw 100 away from the nut 110, and connecting the end of the reverse-rotating nut 130 that presses against the end of the forward-rotating nut 120 through a reverse thread 160 on the outer wall of the reducing section 150, so that the forward-rotating nut 120 and the reverse-rotating nut 130 whose ends press against each other are respectively connected on the outer wall of the screw 100 through the forward thread 140 and the reverse thread 160 with opposite thread directions, ensuring that when the screw 100 is vibrated, the forward-rotating nut 120 and the reverse-rotating nut 130 move toward each other to achieve the anti-loosening function.

[0035] Among them, the end of the screw 100 away from the nut 110 shrinks inward to form a reducing section 150, which can make the reverse rotation nut 130 loosen by vibration and move axially, and the step surface between the screw 100 and the reducing section 150 blocks and limits the reverse rotation nut 130, thereby ensuring the anti-loosening performance and connection stability of the reverse rotation nut 130; a flat washer 170 is sleeved on the screw 100, the end of which presses against the end of the forward rotation nut 120 away from the reverse rotation nut 130, and the flat washer 170 can be used to block, limit and protect the forward rotation nut 120.

[0036] Example 2

[0037] like Figure 3As shown, the embodiment of the present application provides a threaded anti-loosening structure, which is roughly the same as the structure of the threaded anti-loosening structure provided in Example 1, except that, in this embodiment, it also includes a latch 180 and a bayonet 210, the flat washer 170 is provided with a first plug hole 190 that passes through its two end faces, the end face of the forward-spinning nut 120 away from the reverse-spinning nut 130 is provided with a second plug hole 200 corresponding to the first plug hole 190, the latch 180 is used to pass through the first plug hole 190 and then be clamped in the corresponding second plug hole 200, and the outer wall of the screw 100 is provided with The slot 220 is used to engage the pin 210, and the outer wall of the pin 210 is provided with a receiving slot 230 connected to its bottom. When the bottom of the pin 210 is inserted into the slot 220, the pin 180 is inserted away from the end of the forward-rotating nut 120 and moves along the receiving slot 230; a first elastic washer 270 is sleeved on the reducing section 150, and the first elastic washer 270 presses against the inner wall of the forward-rotating nut 120 and the end face of the reverse-rotating nut 130 respectively; the middle part of the screw 100 is also sleeved with a second elastic washer 280 with two ends respectively pressing against the flat washer 170 and the forward-rotating nut 120.

[0038] The thread anti-loosening structure provided in the embodiment of the present application is configured to have a pin 180 passing through the first hole 190 on the flat washer 170 and then inserted into the second hole 200 on the forward-spinning nut 120. The pin 180 can be used to connect the flat washer 170 and the forward-spinning nut 120 into a whole to limit the positions of the flat washer 170 and the forward-spinning nut 120. At the same time, the pin 210 is inserted into the slot 220 on the outer wall of the screw 100, and the end of the pin 180 away from the forward-spinning nut 120 is inserted into the receiving slot 230 on the outer wall of the pin 210, so that the axial position of the pin 180 is limited by the pin 210 connected to the screw 100, ensuring that the flat washer 170, the forward-spinning nut 120, the pin 180 and the pin 210 are stably fixed on the screw 100 after being connected into a whole, thereby effectively improving the overall anti-vibration and anti-loosening performance of the thread anti-loosening structure.

[0039] Among them, a first elastic washer 270 is sleeved on the reducing section 150, and the first elastic washer 270 presses against the inner wall of the forward-rotating nut 120 and the end face of the reverse-rotating nut 130 respectively. The first elastic washer 270 can be used to buffer the inner wall of the forward-rotating nut 120 and the reverse-rotating nut 130, thereby preventing the forward-rotating nut 120 and the reverse-rotating nut 130 from being worn and loosened after being used in a vibration environment for a long time; a second elastic washer 280 is also sleeved on the middle part of the screw 100, whose two ends press against the flat washer 170 and the forward-rotating nut 120 respectively. The second elastic washer 280 can be used to buffer the flat washer 170 and the forward-rotating nut 120, thereby preventing the forward-rotating nut 120 and the reverse-rotating nut 130 from being worn and loosened after being used in a vibration environment for a long time.

[0040] In other optional embodiments, the number of the latch 180, the first socket 190 and the corresponding second socket 200 may also be two or more.

[0041] In other optional embodiments, when the number of the latches 180 is more than two, the number of the latches 210 and the receiving slots 230 may also be two or more.

[0042] In other optional embodiments, the latch 210 and the receiving groove 230 may not be provided.

[0043] Example 3

[0044] like Figure 4 As shown, the embodiment of the present application provides a thread anti-loosening structure, which is roughly the same as the thread anti-loosening structure provided in Example 1, except that, in this embodiment, it also includes a double-headed pin 240 in the shape of a ], the end face of the screw 100 is provided with a reducing section 150 and the end face of the reverse rotation nut 130 away from the forward rotation nut 120 are respectively provided with a screw clamping groove 250 and a nut clamping groove 260, and the two ends of the double-headed pin 240 are respectively clamped in the screw clamping groove 250 and the nut clamping groove 260.

[0045] The thread anti-loosening structure provided in the embodiment of the present application is achieved by respectively providing a screw slot 250 and a nut slot 260 on the end face of the screw 100 with a reducing section 150 and the end face of the reverse-rotation nut 130 away from the forward-rotation nut 120, and respectively clamping the two ends of the ]-shaped double-headed pin 240 into the screw slot 250 and the nut slot 260, so that the double-headed pin 240 can be used to limit the axial position of the reverse-rotation nut 130, thereby preventing the reverse-rotation nut 130 from moving axially and loosening after being vibrated, thereby improving the stability of the thread anti-loosening structure when used in a vibration environment for a long time.

[0046] The present application also provides a workpiece, which includes the above-mentioned thread anti-loosening structure.

[0047] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

Claims

1. A thread anti-loosening structure, characterized in that: The screw rod has a first end which is threaded into the nut and a second end which is threaded into the nut and has a first end which is threaded into the nut and has a second ...

2. The thread anti-loosening structure according to claim 1, characterized in that: It also includes at least one bayonet, the outer wall of the screw is provided with a slot for engaging the bayonet, the outer wall of the bayonet is provided with a receiving slot connected to its bottom, when the bottom of the bayonet is engaged with the slot, the pin is inserted away from one end of the forward-rotating nut and moves along the receiving slot.

3. The thread anti-loosening structure according to claim 1, characterized in that: It also includes a double-headed pin in the shape of ], the screw is provided with an end face of the reducing section and the end face of the reverse rotation nut away from the forward rotation nut are respectively provided with a screw slot and a nut slot, and the two ends of the double-headed pin are respectively clamped in the screw slot and the nut slot.

4. The thread anti-loosening structure according to claim 1, characterized in that: A first elastic washer is sleeved on the diameter-changing section, and the first elastic washer presses against the inner wall of the forward-rotating nut and the end face of the reverse-rotating nut respectively.

5. The thread anti-loosening structure according to claim 1, characterized in that: A second elastic washer is sleeved on the middle part of the screw rod, with two ends respectively pressing against the flat washer and the forward-spinning nut.

6. The thread anti-loosening structure according to claim 1, characterized in that: The forward thread is a coarse thread or a fine thread, and / or the reverse thread is a coarse thread or a fine thread.

7. The thread anti-loosening structure according to claim 1, characterized in that: A nut is provided at one end of the screw away from the diameter-changing section.

8. A workpiece, characterized in that The invention comprises the thread anti-loosening structure according to any one of claims 1 to 7.

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