Vehicle and its screw connection

Abstract

The application relates to the technical field of vehicle connecting pieces, and provides a vehicle and a screw connection structure thereof. The screw connection structure comprises a bolt, a nut screwed on the bolt, and a nut cover connected to the nut; a locking structure is arranged between the bolt and the nut, the locking structure can lock the nut on the bolt and constrain the nut to rotate relative to the bolt only in a tightening direction; an unlocking part is arranged on the nut cover, and when the nut cover is operated, the unlocking part can release the locking of the nut by the locking structure. The screw connection structure is characterized in that the locking structure is arranged to enable the nut to rotate relative to the bolt only in the tightening direction, so that the situation that the nut rotates in a loosening direction due to vibration or impact can be effectively avoided, the relative position between the bolt and the nut can be maintained, and therefore the connection reliability of the screw connection structure can be improved.

Description

Technical Field

[0001] This application relates to the field of vehicle connector technology, and in particular to a vehicle and its screw connection structure. Background Technology

[0002] In the mechanical field, screw connections are a common type of detachable connection structure. They mainly use the threaded fit between bolts and nuts to fix and connect two or more parts.

[0003] In related technologies, after the bolt and nut are fixed, the nut and bolt are prone to relative movement due to vibration or impact, which is not conducive to improving the connection reliability of the bolted structure. Utility Model Content

[0004] In view of this, this application aims to propose a screw connection structure to improve the connection reliability of the screw connection structure.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows: A screwed connection structure includes a bolt, a nut screwed onto the bolt, and a nut cap connected to the nut; A locking structure is provided between the bolt and the nut. The locking structure can lock the nut onto the bolt and restrict the nut to rotate relative to the bolt only in the tightening direction. The nut cover is provided with an unlocking part, and when the nut cover is operated, the unlocking part can release the locking structure from locking the nut.

[0006] Furthermore, the locking structure includes a toothed groove on the bolt, a rotatable pawl on the nut, and a first elastic portion between the pawl and the nut; under the pushing force of the first elastic portion, the pawl inserts into the toothed groove and locks the nut.

[0007] Furthermore, a protrusion is provided in the middle of one end of the nut, and a mounting groove is provided on the protrusion; the pawl and the first elastic part are provided in the mounting groove, and the nut cap is screwed onto the protrusion.

[0008] Furthermore, the nut cap is provided with a threaded hole that is screwed to the protrusion, and a receiving groove provided on the wall of the threaded hole; the unlocking part includes a push block with one end rotatably disposed in the receiving groove, and a second elastic part disposed between the push block and the nut cap, and under the push of the second elastic part, the other end of the push block extends into the mounting groove and is used to push the pawl.

[0009] Furthermore, the end of the nut cap away from the nut is provided with a retaining ring, the retaining ring protruding radially inward along the threaded hole; the retaining ring covers one side of the protrusion, and the bolt passes through the retaining ring.

[0010] Furthermore, the pawl is provided with a receiving block protruding away from the bolt, and the receiving block is located on the rotation path of the push block; when the nut cover is rotated, the push block can push the receiving block and drive the pawl to rotate and disengage from the tooth groove.

[0011] Furthermore, the pawl is provided with a clearance groove, and the receiving block constitutes part of the sidewall of the clearance groove; under the pushing of the second elastic part, the other end of the pushing block is inserted into the clearance groove.

[0012] Furthermore, the mounting groove is provided with a boss extending axially along the protrusion, the pawl is provided with a groove facing the boss, the first elastic part includes a first spring disposed between the boss and the bottom of the groove; and / or, the push block is provided with an extension arm protruding to one side, the second elastic part includes a second spring disposed between the extension arm and the nut cover.

[0013] Furthermore, the locking structure comprises multiple structures spaced apart circumferentially along the bolt; the unlocking part corresponds one-to-one with the locking structure.

[0014] Compared with related technologies, this application has the following advantages: (1) The screw connection structure described in this application, by setting a locking structure, allows the nut to rotate only relative to the bolt in the tightening direction, so as to effectively avoid the situation where the nut rotates in the loosening direction due to vibration or impact, which is conducive to maintaining the relative position between the bolt and the nut, thereby improving the connection reliability of the screw connection structure. At the same time, the nut cover and the unlocking part can release the locking structure from locking the nut, which is conducive to the disassembly between the nut and the bolt.

[0015] (2) By providing a pawl and a first elastic part, when the nut is tightened in the tightening direction, the pawl can be pushed by the bolt and compressed into the first elastic part, which does not affect the rotation between the nut and the bolt. After the bolt and nut are connected, the pawl is pushed into the tooth groove by the first elastic part, forming a lock between the bolt and the nut. When the locking structure is subjected to vibration or impact, the pawl can always remain in the tooth groove under the push of the first elastic part, which can effectively prevent the nut from rotating in the loosening direction, thereby improving the connection reliability of the bolted structure.

[0016] (3) Setting a protrusion helps to connect the nut cap and the nut. At the same time, an installation groove is opened on the protrusion, and the pawl and the first elastic part are placed in the installation groove, so that the nut cap can protect the pawl and the first elastic part, and helps to improve the compactness of the nut and nut cap after connection.

[0017] (4) When the nut is connected to the nut cap, the second elastic part is compressed, causing the push block to be housed in the receiving groove, so that the nut cap can be screwed onto the protrusion. After the nut cap is connected to the protrusion, the other end of the push block extends into the mounting groove under the push of the second elastic part, and can be used to push against the pawl. Thus, when the nut cap is turned in the loosening direction, it helps to release the locking structure from locking the nut.

[0018] (5) By setting a retaining ring on the nut cover, the locking structure and the unlocking part can be effectively protected, and external dust and impurities can be effectively prevented from entering the receiving groove and the installation groove, so as to effectively ensure the functional integrity and stability of the locking structure and the unlocking part during use.

[0019] (6) By setting the receiving block on the rotation path of the pushing block and making the receiving block form part of the side wall of the relief groove, it helps the pushing block to be inserted into the relief groove. At the same time, rotating the nut cover in the loosening direction helps the pushing block to drive the pawl out of the tooth groove, thereby releasing the locking structure from locking the nut.

[0020] (7) Setting a boss helps to fix the first spring, and setting a groove helps to limit the first spring, so that the first spring can provide a stable pushing force to the pawl.

[0021] (8) By setting the extension arm, a stable support point can be provided for the second spring, which helps the second spring to provide a stable pushing force on the extension arm.

[0022] (9) By setting multiple locking structures, multiple locking points between bolts and nuts can be achieved, which can effectively avoid the failure of a single locking structure to prevent loosening of the bolted connection and help improve the connection reliability of the bolted connection.

[0023] This application also proposes a vehicle having a screw connection structure as described above.

[0024] The vehicle described in this application, by setting the bolted connection structure, allows the nut to rotate only relative to the bolt in the tightening direction, effectively avoiding the situation where the nut rotates in the loosening direction due to vibration or impact. This helps to maintain the relative position between the bolt and the nut, thereby improving the connection reliability of the bolted connection structure and contributing to the improvement of vehicle quality. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is an overall schematic diagram of the screw-in structure described in the embodiments of this application; Figure 2 This is a schematic diagram of the locking structure described in the embodiment of this application being disposed in the mounting groove; Figure 3 for Figure 2 A magnified view of part A in the middle; Figure 4 This is a part drawing of the pawl described in the embodiments of this application; Figure 5 This is a schematic diagram of the structure in which the unlocking part is located inside the nut cover, as described in an embodiment of this application; Figure 6 This is a cross-sectional view of the nut cap described in the embodiment of this application; Figure 7 This is a part drawing of the push block described in the embodiments of this application; Figure 8 This is a cross-sectional view of some parts of the screwed structure described in the embodiments of this application; Figure 9 for Figure 8 Another perspective view of the structure shown; Figure 10 for Figure 9 A magnified view of part B in the middle section; Figure 11 This is a cross-sectional view of the push block located in the mounting groove according to an embodiment of this application; Figure 12 This is a schematic diagram showing the state of the screw-connected structure connecting the components according to the embodiments of this application; Explanation of reference numerals in the attached figures: 1. Bolt; 101. Toothed groove; 2. Nut; 201. Protrusion; 2011. Mounting slot; 3. Nut cap; 301. Threaded hole; 302. Receiving groove; 4. Locking structure; 401. Pawl; 4011. Receiving block; 401a. Clearance groove; 401b. Groove; 402. First elastic part; 4021. First spring; 403. Boss; 5. Unlocking part; 501. Push block; 5011. Extension arm; 502. Second elastic part; 5021. Second spring; 6. Retaining ring; 7. Components; x. Tighten in the correct direction. Detailed Implementation

[0026] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0028] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0030] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0032] The first aspect of this application provides a screwed structure that can be applied to a vehicle to connect two adjacent parts 7. Furthermore, through its innovative design, this application can effectively maintain the relative position between the bolt 1 and the nut 2 after the bolt 1 and nut 2 are locked, which is beneficial to improving the connection reliability of the screwed structure.

[0033] In related technologies, a screw connection typically includes a bolt 1 and a nut 2. However, after the bolt 1 and nut 2 are fixed, when external vibrations or impacts act directly on the screw connection, or when the connected components 7 move relative to each other due to vibrations or impacts, and the bolt 1 and nut 2 are in contact with the components 7, causing vibrations or impacts to act indirectly on the screw connection, it is easy for the nut 2 and bolt 1 to undergo relative displacement, which is not conducive to improving the connection reliability of the screw connection.

[0034] In view of this, in order to overcome the shortcomings of related technologies, the screw connection structure in this embodiment combines... Figures 1 to 7 As shown, the overall design includes a bolt 1, a nut 2 screwed onto the bolt 1, and a nut cap 3 connected to the nut 2. Furthermore, a locking structure 4 is provided between the bolt 1 and the nut 2, which can lock the nut 2 onto the bolt 1 and restrict the nut 2 to rotate only relative to the bolt 1 in the tightening direction x.

[0035] The nut cover 3 is provided with an unlocking part 5, and when the nut cover 3 is operated, the unlocking part 5 can release the locking structure 4 from locking the nut 2.

[0036] Therefore, by setting the locking structure 4, the nut 2 can only rotate relative to the bolt 1 in the tightening direction x, effectively preventing the nut 2 from rotating in the loosening direction due to vibration or impact. This helps maintain the relative position between the bolt 1 and the nut 2, keeping the two adjacent components 7 in a tight state and improving the connection reliability of the bolted structure. At the same time, the nut cover 3 and the unlocking part 5 are provided. When the nut cover 3 is rotated in the loosening direction, the unlocking part 5 can release the locking structure 4 from locking the nut 2, thereby facilitating the disassembly of the nut 2 and the bolt 1.

[0037] Based on the above overview, it is worth noting that, in conjunction with Figure 9 As shown, the tightening direction x refers to the direction in which rotating nut 2 clamps component 7 between the head of bolt 1 and nut 2. It can be understood that rotating bolt 1 can also clamp component 7 between the head of bolt 1 and nut 2; in this case, the rotation direction of bolt 1 is opposite to the rotation direction of nut 2. When it is necessary to disassemble bolt 1 and nut 2, simply rotate nut cap 3 in the loosening direction and then tighten nut 2; the loosening direction is the opposite of the tightening direction x.

[0038] In specific implementation, we will continue to combine Figure 1and Figure 2 As shown, both nut 2 and nut cap 3 can be set to be hexagonal nuts 2, that is, the outer periphery of nut 2 and nut cap 3 has six edges to facilitate the application of torque. The structure of bolt 1 is basically the same as the existing structure, that is, the outer periphery of the head of bolt 1 also has six edges. Of course, it is understandable that bolts, nuts and nut caps can also be set to other shapes, as long as they can be easily tightened.

[0039] In some of the exemplary implementations, combined with Figure 2 and Figure 4 As shown, the locking structure 4 includes a toothed groove 101 on the bolt 1, a rotatable pawl 401 on the nut 2, and a first elastic part 402 between the pawl 401 and the nut 2. Under the pushing force of the first elastic part 402, the pawl 401 inserts into the toothed groove 101 and locks the nut 2.

[0040] As described above, by setting the pawl 401 and the first elastic part 402, when the nut 2 is tightened in the tightening direction x, the pawl 401 can be pushed against the bolt 1 and the first elastic part 402 can be compressed, so that the pawl 401 will not affect the rotation between the nut 2 and the bolt 1. Furthermore, when the pawl 401 corresponds to the tooth groove 101, under the action of the first elastic part 402, the pawl 401 can automatically insert into the tooth groove 101, realizing automatic locking between the bolt 1 and the nut 2.

[0041] When the pawl 401 is pushed by the first elastic part 402, it inserts into the tooth groove 101, forming a lock between the bolt 1 and the nut 2. If the locking structure 4 is subjected to vibration or impact, the pawl 401 can always remain in the tooth groove 101 under the push of the first elastic part 402, which can effectively prevent the nut 2 from rotating in the loosening direction, thereby improving the connection reliability of the screwed structure.

[0042] It is understood that the pawl 401 has a pawl tip. When the nut 2 and bolt 1 are in the locked state, the pawl tip is inserted into and held in the tooth groove 101 under the pushing action of the first elastic part 402. In order to facilitate relative rotation between the pawl 401 and the nut 2 so that the pawl tip is inserted into the tooth groove 101, the first elastic part 402 is preferably located on the side of the pawl 401 near the pawl tip.

[0043] In some of the exemplary implementations, the combination continues Figure 2 and Figure 4 As shown, a protrusion 201 is provided in the middle of one end of the nut 2, and a mounting groove 2011 is provided on the protrusion 201. The pawl 401 and the first elastic part 402 are provided in the mounting groove 2011, and the nut cover 3 is screwed onto the protrusion 201.

[0044] Therefore, by providing the protrusion 201, the nut 2 has a connecting portion that can connect with the nut cap 3, which facilitates the connection between the nut cap 3 and the nut 2. Simultaneously, the mounting groove 2011 is formed on the protrusion 201, and the pawl 401 and the first elastic part 402 are disposed within the mounting groove 2011. This not only facilitates the arrangement of the pawl 401 and the first elastic part 402 but also reduces the overall axial space occupied. Furthermore, the nut cap 3 can provide protection for the pawl 401 and the first elastic part 402, and helps improve the compactness of the connection between the nut 2 and the nut cap 3.

[0045] In specific implementation, such as Figure 2 As shown, the protrusion 201 is annular and fixedly connected to the nut 2. The annular protrusion 201 facilitates the passage of the bolt 1 through it. As a specific embodiment of the protrusion 201, preferably in this embodiment, the inner wall of the protrusion 201 abuts against the outer wall of the bolt 1. This arrangement increases the contact area between the protrusion 201 and the bolt 1, thereby effectively improving the shear resistance of the bolt 1.

[0046] As an optional fixing method for the protrusion 201 and the nut 2, it is preferable that the protrusion 201 and the nut 2 are integrally formed, which helps to ensure the connection strength between the protrusion 201 and the nut 2.

[0047] In practice, the mounting groove 2011 penetrates the inner and outer walls of the protrusion 201, so that one side of the pawl 401 installed in the mounting groove 2011 can contact the bolt 1 to lock the nut 2 and the bolt 1, and the other side can contact the unlocking part 5 to unlock the nut 2 and the bolt 1.

[0048] It is worth noting that, in combination Figure 3 As shown, in one optional embodiment where the pawl 401 and the nut 2 are rotatably connected, a rotating shaft is rotatably provided at the end of the pawl 401 away from the pawl tip. The rotating shaft is fixedly connected to the nut 2, thus enabling relative rotation between the pawl 401 and the rotating shaft, thereby enabling relative rotation between the pawl 401 and the nut 2.

[0049] In some of the exemplary implementations, combined with Figure 5 and Figure 6 As shown, the nut cover 3 is provided with a threaded hole 301 that is screwed to the protrusion 201, and a receiving groove 302 provided on the wall of the threaded hole 301. The unlocking part 5 includes a push block 501 rotatably disposed in the receiving groove 302 at one end, and a second elastic part 502 provided between the push block 501 and the nut cover 3. Under the push of the second elastic part 502, the other end of the push block 501 extends into the mounting groove 2011 and is used to push the pawl 401.

[0050] As configured above, when the nut 2 is connected to the nut cap 3, the second elastic part 502 is compressed, causing the push block 501 to be housed in the receiving groove 302. This prevents the push block 501 from affecting the relative rotation between the nut 2 and the nut cap 3, allowing the nut cap 3 to be screwed onto the protrusion 201. After the nut cap 3 is connected to the protrusion 201, the other end of the push block 501 extends into the mounting groove 2011 under the push of the second elastic part 502, and can be used to push against the pawl 401. Thus, when the nut cap 3 is turned in the loosening direction, the locking structure 4 can be released from locking the nut 2.

[0051] Understandably, given that the protrusion 201 is annular, the threaded hole 301 is also circular to fit the protrusion 201 and be screwed together.

[0052] It is worth noting that, in combination Figure 5 As shown, in one optional embodiment of the push block 501 and the nut cover 3, a rotating shaft is provided at one end of the push block 501. This rotating shaft is rotatably connected to the push block 501, and the rotating shaft can be inserted into and tightened onto the nut cover 3 near the end of the nut 2, thereby realizing the rotatable connection between the push block 501 and the nut cover 3. With the above configuration, the push block 501 can be easily rotated and assembled inside the nut cover 3.

[0053] Understandably, when the nut cap 3 is connected to the nut 2 via the protrusion 201, as the nut cap 3 and the protrusion 201 rotate relative to each other, the push block 501 is squeezed by the outer wall of the protrusion 201, compressing the second elastic part 502, allowing the push block 501 to be housed in the receiving groove 302. When the nut 2 is connected to the nut cap 3, as the second elastic part 502 resets, the push block 501 pushes the pawl 401. At this time, the outer side of the push block 501 abuts against the groove wall of the receiving groove 302 to effectively prevent the push block 501 from excessively rotating and pulling the second elastic part 502. This allows the push block 501 to apply force to the pawl 401, causing the pawl tip of the pawl 401 to disengage from the tooth groove 101, thus unlocking the bolt 1 and the nut 2.

[0054] In some of the exemplary implementations, combined with Figure 5 and Figure 6 As shown, the end of the nut cap 3 away from the nut 2 is provided with a retaining ring 6, which protrudes radially inward along the threaded hole 301. The retaining ring 6 covers one side of the protrusion 201, and the bolt 1 passes through the retaining ring 6.

[0055] Therefore, by setting a retaining ring 6 on the nut cover 3, the gap between the nut cover 3 and the bolt 1 can be effectively blocked, thereby achieving effective protection for the locking structure 4 and the unlocking part 5. This effectively prevents external dust and impurities from entering the receiving groove 302 and the mounting groove 2011, thus effectively ensuring the functional integrity and stability of the locking structure 4 and the unlocking part 5 during use.

[0056] In a specific implementation, as an optional method, the inner wall of the retaining ring 6 abuts against the bolt 1. This not only increases the radial support strength of the bolt 1 and improves its bending resistance, but also effectively prevents foreign objects from entering the gap between them, which would be detrimental to unlocking.

[0057] It is worth noting that the retaining ring 6 can be fixedly connected to the nut cover 3 or detachably connected. Preferably, the retaining ring 6 is fixedly connected to the nut cover 3, and specifically, the retaining ring 6 and the nut cover 3 are integrally formed.

[0058] In some of the exemplary implementations, combined with Figures 8 to 10 As shown, the pawl 401 is provided with a receiving block 4011 protruding away from the bolt 1. The receiving block 4011 is located on the rotation path of the push block 501. When the nut cover 3 is rotated, the push block 501 can push the receiving block 4011 and drive the pawl 401 to rotate and disengage from the tooth groove 101.

[0059] Specifically, the pawl 401 is provided with a clearance groove 401a, and the receiving block 4011 forms part of the sidewall of the clearance groove 401a. Under the pushing of the second elastic part 502, the other end of the pushing block 501 is inserted into the clearance groove 401a.

[0060] Therefore, by positioning the receiving block 4011 on the rotation path of the pushing block 501, and making the receiving block 4011 form part of the sidewall of the clearance groove 401a, it is helpful for the pushing block 501 to be inserted into the clearance groove 401a. At the same time, rotating the nut cover 3 in the loosening direction helps the pushing block 501 to drive the pawl 401 out of the tooth groove 101, thereby releasing the locking structure 4 from locking the nut 2.

[0061] It is worth noting that after the push block 501 is inserted into the relief groove 401a, as the nut cover 3 rotates in the loosening direction, the push block 501 pushes against the receiving block 4011. The receiving block 4011 contacts the push block 501 and compresses the first elastic part 402 under the push of the push block 501. At the same time, the pawl 401 rotates, causing the pawl tip of the pawl 401 to disengage from the tooth groove 101.

[0062] In some of the exemplary implementations, combined with Figures 8 to 11As shown, the mounting groove 2011 is provided with a boss 403 extending axially along the protrusion 201, and the pawl 401 is provided with a groove 401b facing the boss 403. The first elastic part 402 includes a first spring 4021 disposed between the boss 403 and the bottom of the groove 401b.

[0063] Therefore, by setting the boss 403, it is helpful to fix the first spring 4021. At the same time, by setting the groove 401b, it is helpful to limit the first spring 4021, so that the first spring 4021 can provide a stable pushing force to the pawl 401.

[0064] It is worth noting that, in order to effectively ensure the stability of the boss 403 when the first spring 4021 is compressed or reset, in this embodiment the boss 403 is fixedly connected to the nut 2. Specifically, it can be welded or the boss 403 and the nut 2 can be integrally formed so that the boss 403 can be firmly set on the nut 2.

[0065] It is understandable that by setting the groove 401b, on the one hand, the connection stability between the first spring 4021 and the pawl 401 can be effectively improved. On the other hand, when the bolt 1 and the nut 2 are screwed together, when the rotation angle of the pawl 401 is constant, the setting of the groove 401b can make way for the boss 403, thus improving the compactness of the locking structure 4.

[0066] In specific implementation, the first elastic part 402 can be any other elastic body besides the first spring 4021 described above, to achieve energy storage under external force compression and release energy when the external force is offset or disappears. For example, rubber can be used to make the first elastic part 402. In this way, when the bolt 1 and nut 2 are screwed together, the first elastic part 402 is compressed to store energy and can release energy to reset when the claw tip corresponds to the tooth groove 101, so that the first elastic part 402 pushes the pawl 401 and the claw tip of the pawl 401 is inserted into the tooth groove 101.

[0067] In some of the exemplary implementations, the combination continues Figure 10 and 11 As shown, the push block 501 is provided with an extension arm 5011 protruding to one side, and the second elastic part 502 includes a second spring 5021 disposed between the extension arm 5011 and the nut cover 3.

[0068] Therefore, by setting the extension arm 5011, a stable support point can be provided for the second spring 5021, which helps the second spring 5021 to provide a stable pushing force on the extension arm 5011.

[0069] It is worth noting that, in order to effectively ensure the connection strength between the extension arm 5011 and the push block 501, the extension arm 5011 and the push block 501 are integrally formed, and the end of the extension arm 5011 away from the push block 501 is bent toward the side closer to the second spring 5021 to form a receiving space that can accommodate one end of the second spring, which helps to improve the connection stability between the second spring 5021 and the extension arm 5011.

[0070] It is understood that the second spring 5021 is disposed between the extension arm 5011 and the nut cover 3. To ensure the stability of the structure, the second spring 5021 is connected between the extension arm 5011 and the nut cover 3. Specifically, the second spring 5021 can be connected only to the extension arm 5011, or only to the nut cover 3, or it can be configured to be connected to both the extension arm 5011 and the nut cover 3. As an optional implementation, it is preferred in this application that the second spring 5021 is connected to the nut cover 3, which helps to compress the second spring 5021 along its axial direction and provide a pushing force to the extension arm 5011.

[0071] In specific implementation, similar to the first elastic part 402, the second elastic part 502, in addition to using the second spring 5021 described above, can also be other elastic bodies. An elastic body has the characteristic of storing energy when compressed by an external force and releasing energy when the external force disappears. For example, the second elastic part 502 can also be made of rubber. Thus, when the nut cap 3 is connected to the nut 2, the second elastic part 502 can be compressed by an external force, and when the push block 501 corresponds to the clearance groove 401a, the second elastic part 502 can release energy and reset, allowing the push block 501 to insert into the clearance groove 401a.

[0072] In some of the exemplary implementations, the combination continues Figure 9 As shown, there are multiple locking structures 4 arranged at intervals along the circumference of the bolt 1, and the unlocking part 5 is arranged in a one-to-one correspondence with the locking structure 4.

[0073] Therefore, by setting multiple locking structures 4, multi-point locking between bolt 1 and nut 2 can be achieved, which can effectively avoid the failure of the bolted connection structure due to the failure of a single locking structure 4, and help improve the connection reliability of the bolted connection structure.

[0074] It is understandable that multiple locking structures 4 are of the same specification so that multiple locking structures 4 can lock or unlock the bolt 1 and nut 2 simultaneously.

[0075] It is worth noting that the locking structure 4 is provided in multiple ways along the circumference of the bolt 1, such as 3, 4, 5, etc. In this embodiment, it is preferred to provide 3 locking structures 4. This can effectively avoid the failure of the bolted connection structure due to the failure of a single locking structure 4, and can also effectively ensure the strength of the tooth groove 101 and the structural strength of the bolt 1 after the tooth groove 101 is opened.

[0076] Of course, it is also understandable that the above-mentioned setting of three locking structures 4 is only a preferred embodiment. In this embodiment, if one or two locking structures 4 are set, the locking between the bolt 1 and the nut 2 can also be achieved.

[0077] In specific implementation, it is preferable to set multiple locking structures 4 at equal intervals along the circumference of the bolt 1, so that the grooves 101 opened on the bolt 1 are also distributed at equal intervals along the circumference of the bolt 1. When the pawl 401 interacts with the bolt 1 through the grooves 101, the equally distributed locking structures 4 can apply a more uniform torque to the bolt 1, so as to effectively avoid the situation of uneven force on the bolt 1.

[0078] Based on the above overview, combined with Figure 1 and Figure 12 As shown, when adjacent parts 7 are connected by the screw connection structure described above, the pitch of the thread on the screw and nut 2 can be calculated by calculating the thickness between adjacent parts 7, so that when the end face of the nut 2 close to the part 7 is pressed against the part 7, the pawl tip of the pawl 401 is engaged in the tooth groove 101.

[0079] Based on the above overview, it can be understood that when using the screw connection structure described above to fix adjacent components 7, the bolt 1 is passed through the component 7 to be fixed, and the nut 2 and nut cap 3 are fitted onto the bolt 1. At this point, the bolt 1 can be kept stationary, and the nut 2 can be rotated in the tightening direction x until it abuts against the component 7. At this point, the pawl 401 engages within the toothed groove 101, thus fixing the components 7 together. Alternatively, the nut 2 can be kept stationary, and the bolt 1 can be tightened in the loosening direction, i.e., in the opposite direction of tightening, to fix the components 7 together. Or, the nut 2 can be tightened in the tightening direction x while the bolt 1 is tightened in the loosening direction.

[0080] When it is necessary to disassemble the screwed structure, first turn the nut cover 3 in the loosening direction so that the pawl 401 disengages from the tooth groove 101. At this time, the bolt 1 or nut 2 can also be turned. When disassembling, it is preferable to turn the bolt 1 to separate the bolt 1 from the nut 2. In this way, you only need to fix the nut cover 3 and keep the nut cover 3 still, and only turn the bolt 1.

[0081] It is worth noting that, regarding the screw connection structure of this embodiment, based on the above exemplary implementations, in specific implementation, as a preferred embodiment, it is still based on... Figures 1 to 12 As shown, it may include, for example, a bolt 1, a nut 2 screwed onto the bolt 1, and a nut cap 3 connected to the nut 2. A locking structure 4 is provided between the bolt 1 and the nut 2, which can lock the nut 2 onto the bolt 1 and restrict the nut 2 to rotate only relative to the bolt 1 in the tightening direction x; the nut cap 3 is provided with an unlocking part 5, and when the nut cap 3 is operated, the unlocking part 5 can release the locking structure 4 from locking the nut 2.

[0082] The locking structure 4 includes a toothed groove 101 on the bolt 1, a rotatable pawl 401 on the nut 2, and a first spring 4021 between the pawl 401 and the nut 2. Under the push of the first spring 4021, the pawl 401 is inserted into the toothed groove 101 and locks the nut 2.

[0083] Furthermore, a protrusion 201 is provided in the middle of one end of the nut 2, and an installation groove 2011 is provided on the protrusion 201. The pawl 401 and the first spring 4021 are provided in the installation groove 2011, and the nut cover 3 is screwed onto the protrusion 201.

[0084] The nut cover 3 is provided with a threaded hole 301 that is screwed to the protrusion 201, and a receiving groove 302 provided on the wall of the threaded hole 301. The unlocking part 5 includes a push block 501 that is rotatably provided in the receiving groove 302, and a second elastic part 502 provided between the push block 501 and the nut cover 3. Under the push of the second spring 5021, the other end of the push block 501 extends into the mounting groove 2011 and is used to push the pawl 401.

[0085] The ratchet 401 has a receiving block 4011 protruding away from the bolt 1. The receiving block 4011 is located on the rotation path of the push block 501. When the nut cover 3 is rotated, the push block 501 can push the receiving block 4011, causing the ratchet 401 to rotate and disengage from the tooth groove 101. The ratchet 401 has a clearance groove 401a, and the receiving block 4011 forms part of the sidewall of the clearance groove 401a. Under the push of the second spring 5021, the other end of the push block 501 is inserted into the clearance groove 401a.

[0086] In the preferred embodiment of the above screw connection structure, the specific setting and arrangement of bolt 1, nut 2, nut cap 3, etc. can still be referred to the description in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of bolt 1, nut 2, and nut cap 3, etc. can also be referred to the description in the above exemplary embodiments.

[0087] The screw connection structure in this embodiment adopts the above design. By setting the locking structure 4, the nut 2 can only rotate relative to the bolt 1 in the tightening direction x, which effectively avoids the situation where the nut 2 rotates in the loosening direction due to vibration or impact. This helps to maintain the relative position between the bolt 1 and the nut 2, thereby improving the connection reliability of the screw connection structure. At the same time, the nut cover 3 and the unlocking part 5 can release the locking structure 4 from locking the nut 2, which helps to disassemble the nut 2 and the bolt 1.

[0088] An embodiment of the second aspect of this application provides a vehicle having a threaded structure as shown in the first aspect.

[0089] In this embodiment, the vehicle, by providing a screw connection structure as shown in the first aspect, can help ensure the reliable connection between the connected parts 7 in the vehicle, effectively avoid the situation where the nut 2 rotates in the loosening direction due to vibration or impact, and help improve the connection reliability of the screw connection structure, thereby helping to improve the quality of the vehicle.

[0090] The above are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the protection scope of the claims of this application.

Claims

1. A screw-in structure, characterized in that: Includes a bolt (1), a nut (2) screwed onto the bolt (1), and a nut cap (3) connected to the nut (2); A locking structure (4) is provided between the bolt (1) and the nut (2). The locking structure (4) can lock the nut (2) onto the bolt (1) and restrict the nut (2) to rotate relative to the bolt (1) only in the tightening direction (x). The nut cover (3) is provided with an unlocking part (5), and when the nut cover (3) is manipulated, the unlocking part (5) can release the locking structure (4) from locking the nut (2).

2. The screw connection structure according to claim 1, characterized in that: The locking structure (4) includes a toothed groove (101) on the bolt (1), a rotatable pawl (401) on the nut (2), and a first elastic part (402) between the pawl (401) and the nut (2); Under the push of the first elastic part (402), the pawl (401) is inserted into the tooth groove (101) and locks the nut (2).

3. The screw connection structure according to claim 2, characterized in that: The nut (2) has a protrusion (201) at the middle of one end, and a mounting groove (2011) is provided on the protrusion (201); The pawl (401) and the first elastic part (402) are disposed in the mounting groove (2011), and the nut cap (3) is screwed onto the protrusion (201).

4. The screwed structure according to claim 3, characterized in that: The nut cap (3) is provided with a threaded hole (301) that is screwed to the protrusion (201), and a receiving groove (302) provided on the wall of the threaded hole (301); The unlocking part (5) includes a push block (501) rotatably disposed in the receiving groove (302) at one end, and a second elastic part (502) disposed between the push block (501) and the nut cover (3). Under the push of the second elastic part (502), the other end of the push block (501) extends into the mounting groove (2011) and is used to push the pawl (401).

5. The screwed structure according to claim 4, characterized in that: The nut cap (3) is provided with a retaining ring (6) at one end away from the nut (2), and the retaining ring (6) protrudes inward along the radial direction of the threaded hole (301); The retaining ring (6) covers one side of the protrusion (201), and the bolt (1) passes through the retaining ring (6).

6. The screwed structure according to claim 4, characterized in that: The pawl (401) is provided with a receiving block (4011) protruding away from the bolt (1), and the receiving block (4011) is located on the rotation path of the push block (501); When the nut cover (3) is rotated, the push block (501) can push the receiving block (4011) and drive the pawl (401) to rotate and disengage from the tooth groove (101).

7. The screwed structure according to claim 6, characterized in that: The pawl (401) is provided with a relief groove (401a), and the receiving block (4011) constitutes part of the sidewall of the relief groove (401a); Under the push of the second elastic part (502), the other end of the push block (501) is inserted into the relief groove (401a).

8. The screwed structure according to claim 4, characterized in that: The mounting groove (2011) is provided with a boss (403) extending axially along the protrusion (201), and the pawl (401) is provided with a groove (401b) facing the boss (403). The first elastic part (402) includes a first spring (4021) disposed between the boss (403) and the bottom of the groove (401b); and / or, The push block (501) is provided with an extension arm (5011) protruding to one side, and the second elastic part (502) includes a second spring (5021) disposed between the extension arm (5011) and the nut cover (3).

9. The screw-in structure according to any one of claims 1 to 8, characterized in that: The locking structure (4) consists of multiple structures spaced apart circumferentially along the bolt (1); The unlocking part (5) is provided in a one-to-one correspondence with the locking structure (4).

10. A vehicle, characterized in that: The vehicle is provided with a threaded structure as described in any one of claims 1 to 9.

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