Locking device, articulated frame and articulated vehicle

By designing a locking device, the nuts are precisely fixed using a fixed plate and connecting plate structure. Combined with a socket joint and torque wrench interface, the problem of discontinuous nut adjustment on articulated vehicles is solved, achieving efficient and safe nut locking and improving assembly quality and efficiency.

CN223748980UActive Publication Date: 2026-01-02SANY HEAVY EQUIP CO LTD +1
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Patent Information

Application Number
CN202520189599.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-07
Publication Date
2026-01-02
Estimated Expiration
2035-02-07

AI Technical Summary

Technical Problem

The existing articulated machine has discontinuous operation when adjusting the nut, resulting in low assembly efficiency, safety hazards, and inaccurate verification of the tightening torque, which affects assembly quality and the labor intensity of workers.

Method used

Design a locking device including a first fixing plate, a second fixing plate and multiple connecting plates, which precisely fixes the nut through pin holes and fixing pins, and combines a socket joint with a torque wrench interface to achieve stable adjustment and precise locking of the nut.

Benefits of technology

It improves the flexibility and accuracy of nut adjustment, reduces the difficulty of operation, enhances the safety and versatility of the device, improves assembly efficiency and quality, and reduces the labor intensity of workers.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a locking device, a hinged frame and a hinged vehicle, the locking device is used for adjusting a nut, and the locking device comprises a first fixing plate, a second fixing plate and a third fixing plate, the second fixing plate is used for fixing the nut; one end of any connecting plate is arranged on the first fixing plate, the other end of any connecting plate is arranged on the second fixing plate, and the connecting plates are arranged at intervals. The crowbar is inserted into the gap between the second fixing plate and the first fixing plate and clamps the two connecting plates at the symmetrical positions, the first fixing plate limits the crowbar from slipping off from the side face, and operation safety is guaranteed.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the field of assembly tools, and particularly relates to a locking device, a hinged frame and a hinged vehicle. BACKGROUND

[0002] The hinged vehicle is a kind of bulk material short-distance transport equipment, which has the characteristics of strong passability, good maneuverability, wide adaptability and high production efficiency, and is commonly used on poor road conditions, such as soft road, muddy road, narrow road, steep road and sharp turning road. Application scenarios are mainly mining, municipal infrastructure, water conservancy and hydropower, and forestry development, and the development prospect is very broad, so there are higher expectations for assembly efficiency and assembly quality in the production and manufacturing process of the hinged vehicle. In the production and assembly process of the hinged vehicle, the adjustment nut locking of the hinged frame assembly is an important assembly process, and the adjustment nut also needs to be locked and checked during regular maintenance of the equipment on the customer's site to ensure the attendance rate of the equipment. The existing locking method needs to adjust the position of the pin rod to continue the locking operation after the adjustment nut is rotated by a certain angle, the operation is discontinuous, and the assembly efficiency is low. The pin rod is stuck with a crowbar to rotate, and the crowbar has the risk of slipping from the side, which may cause injury to the operator and pose a safety hazard. The locking process mainly relies on the force exerted by the worker on the extended crowbar, and the final locking torque cannot be accurately checked, the assembly quality is unstable, and the labor intensity of the worker is greatly increased.

[0003] Therefore, a locking device, a hinged frame and a hinged vehicle that can improve versatility and reduce the difficulty of operation of workers become urgent problems to be solved. UTILITY MODEL CONTENTS

[0004] Therefore, the first purpose of the utility model is to provide a locking device.

[0005] The second purpose of the utility model is to provide a hinged frame.

[0006] The third purpose of the utility model is to provide a hinged vehicle.

[0007] Therefore, the first aspect of the utility model provides a locking device for adjusting a nut, which comprises: a first fixed plate; a second fixed plate for fixing the nut; a plurality of connecting plates, one end of any connecting plate is arranged on the first fixed plate, and the other end is arranged on the second fixed plate, and the plurality of connecting plates are arranged at intervals.

[0008] In this design, the locking device is composed of a first fixed plate, a second fixed plate, and a plurality of spaced connection plates. This structural design has the following technical effects: First, through the cooperation of the first fixed plate and the second fixed plate, the nut can be stably fixed, providing a reliable support foundation for the adjustment of the nut. Second, the spaced arrangement of the plurality of connection plates allows the entire device to more evenly disperse stress when under stress, enhancing the structural stability and load-bearing capacity of the device and preventing deformation or damage due to excessive local stress. In addition, this structure also facilitates the adjustment of the position and angle of the nut according to actual needs, improving the flexibility and accuracy of nut adjustment. At the same time, this structure is simple and compact, facilitating manufacturing and assembly, reducing production costs and maintenance difficulty, and having high practicality and economy. The crowbar is inserted into the gap between the second fixed plate and the first fixed plate and is clamped to the two connection plates in symmetrical positions. The first fixed plate restricts the crowbar from slipping from the side, ensuring safe operation. At this time, the crowbar is rotated by a certain angle, then the crowbar is withdrawn and reinserted into the appropriate position, the crowbar is moved again, and the above operation is repeated until the nut is locked.

[0009] In some possible designs, the second fixed plate includes a plurality of pin holes spaced apart corresponding to the sides of the nut; the locking device further includes a plurality of fixed pins corresponding to the pin holes, and the plurality of fixed pins are used to fix the nut.

[0010] In this design, through the cooperation of the pin holes and the fixed pins, the nut can be fixed more accurately to prevent displacement or rotation during adjustment, thereby improving the reliability and stability of the nut fixation. This fixing method not only enhances the restraining ability of the locking device on the nut, but also makes the installation and removal of the nut more convenient and efficient, improving the work efficiency. In addition, the design of multiple pin holes can be flexibly adjusted according to the size and shape of the nut, enhancing the universality and adaptability of the device, making it applicable to nuts of different specifications and models, further expanding the application range of the locking device.

[0011] In some possible designs, the second fixed plate further includes a first through hole, which is circular and has a diameter smaller than that of the inscribed circle of the nut.

[0012] In this design, the first through hole provides a positioning space for the nut, allowing the nut to be placed more stably on the second fixed plate, further enhancing the fixing effect of the nut. Since the diameter of the first through hole is smaller than the diameter of the inscribed circle of the nut, the nut cannot pass through the hole, effectively preventing the nut from falling off the second fixed plate during adjustment, improving the safety and reliability of the device. In addition, this design can also limit the axial position of the nut, ensuring that the nut always remains on the same axis during adjustment, improving the accuracy and consistency of nut adjustment, which is of great significance for occasions that require high-precision nut adjustment.

[0013] In some possible designs, the second fixed plate includes a second through hole that is adapted to the shape of the nut.

[0014] In this design, the adaptability of the second through hole to the shape of the nut allows the nut to be more tightly embedded in the second fixed plate, achieving precise fixing and positioning of the nut. This tight fit not only improves the stability of the nut fixation, but also effectively prevents the nut from shaking or shifting during adjustment, ensuring the accuracy and reliability of the nut adjustment. In addition, the adapted second through hole can also protect the outer surface of the nut, avoiding unnecessary friction or collision between the nut and the second fixed plate during installation, adjustment or disassembly, thereby prolonging the service life of the nut and reducing the maintenance cost of the equipment. At the same time, this design also makes the locking device better adapt to nuts of different shapes and sizes, improving the universality and applicability of the device.

[0015] In some possible designs, the second fixed plate is circular, and the plurality of connecting plates are arranged along the diameter of the second fixed plate.

[0016] In this design, first of all, the circular second fixed plate has good symmetry and uniformity, making the stress of the locking device more balanced in all directions, further enhancing the structural stability and carrying capacity of the device. Secondly, the connecting plates are arranged along the diameter of the second fixed plate, which not only makes full use of space and improves the compactness of the device, but also allows the connecting plates to distribute stress more evenly, further improving the strength and reliability of the device. In addition, this structure also facilitates processing and assembly, reducing production cost and difficulty. At the same time, the circular second fixed plate and the connecting plates arranged along the diameter also make the locking device have better appearance and symmetry, meeting the requirements of engineering aesthetics and improving the overall quality and market competitiveness of the product.

[0017] In some possible designs, the locking device further includes a sleeve joint arranged on the first fixed plate.

[0018] In this design, the sleeve joint provides an interface for the locking device to connect with external tools such as torque wrenches, making it more convenient for operators to use tools to adjust and operate the nut. Through the sleeve joint, the torque of the external tool can be transmitted to the locking device, thereby achieving precise adjustment of the nut, improving the efficiency and accuracy of nut adjustment. In addition, the design of the sleeve joint can also improve the versatility and compatibility of the locking device, allowing it to be used with various types of external tools, further expanding the application range of the locking device. At the same time, the arrangement of the sleeve joint also makes the structure of the locking device more complete and compact, improving the overall performance and reliability of the device.

[0019] In some possible designs, the first fixed plate is provided with a third through hole, and the sleeve joint comprises: a first connecting section, which is arranged in the third through hole.

[0020] In this design, the third through hole provides a mounting space for the first connecting section of the sleeve joint, allowing the sleeve joint to be more stably mounted on the first fixed plate, enhancing the connection strength and reliability between the sleeve joint and the first fixed plate. The first connecting section is arranged in the third through hole, which not only ensures the stability of the sleeve joint during use, but also prevents the sleeve joint from loosening or falling off when subjected to external forces, thereby improving the overall performance and safety of the locking device. In addition, this design can also accurately adjust the position of the sleeve joint, ensuring that the connection between the sleeve joint and the external tool is more tight and reliable, further improving the accuracy and efficiency of nut adjustment.

[0021] In some possible designs, the sleeve joint further comprises: a joint section, which is adapted in shape to the shape of the torque wrench.

[0022] In this design, the adaptability of the joint section to the shape of the torque wrench allows the locking device to achieve a more tight and reliable connection with the torque wrench, thereby improving the efficiency and accuracy of nut adjustment. Through this adapted joint section, the torque of the torque wrench can be more accurately transmitted to the locking device, thereby achieving precise adjustment of the nut, meeting the requirements of nut adjustment accuracy in different occasions. In addition, the adapted joint section can also improve the versatility and compatibility between the locking device and the torque wrench, allowing it to be used with various types of torque wrenches, further expanding the application range of the locking device. At the same time, this design also makes the operation of the locking device more convenient and efficient, reducing the labor intensity of the operators and improving the work efficiency.

[0023] According to the second aspect of the present application, a hinged frame is also provided, comprising: the locking device according to any one of the technical solutions of the first aspect.

[0024] In the technical solution, the hinged frame comprises the locking device as proposed in any of the first aspects, and therefore has all the technical effects of the locking device of the first aspect.

[0025] According to the third aspect of the utility model, a hinged vehicle is further provided, comprising: the hinged frame as proposed in the second aspect.

[0026] In the technical solution, the hinged vehicle comprises the hinged frame as proposed in the second aspect, and therefore has all the technical effects of the hinged frame of the second aspect.

[0027] The additional aspects and advantages of the utility model will become apparent in the following description part, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or related technologies, the following will briefly introduce the drawings needed to be used in the embodiment or related technology description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in these drawings without creative labor.

[0029] Figure 1 It is the schematic diagram of the locking device of one embodiment provided by the utility model;

[0030] Figure 2 It is one of the schematic diagrams of the second fixed plate of one embodiment provided by the utility model;

[0031] Figure 3 It is the second schematic diagram of the second fixed plate of one embodiment provided by the utility model;

[0032] Figure 4 It is the schematic diagram of the fixed pin of one embodiment provided by the utility model;

[0033] Figure 5 It is the schematic diagram of the connecting plate of one embodiment provided by the utility model;

[0034] Figure 6 It is the schematic diagram of the first fixed plate of one embodiment provided by the utility model;

[0035] Figure 7 It is the schematic diagram of the sleeve joint of one embodiment provided by the utility model;

[0036] Figure 8 It is the schematic diagram of the hinged frame and the nut of one embodiment provided by the utility model;

[0037] Figure 9It is a schematic view of the hinged frame and the locking device of one embodiment provided by the utility model.

[0038] Among them, Figure 1 And Figure 9 The correspondence between the reference signs and the component names is as follows:

[0039] 1 locking device, 10 first fixed plate, 102 third through hole, 12 second fixed plate, 122 pin hole, 124 first through hole, 126 second through hole, 14 connecting plate, 16 fixed pin, 18 sleeve joint, 182 first connecting section, 184 joint section, 2 nut, 3 hinged frame. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0041] The utility model provides a locking device 1 in the first aspect of embodiments, as Figure 1 And Figure 5 The locking device 1 is used for adjusting the nut 2, and the locking device 1 comprises: a first fixed plate 10; a second fixed plate 12 for fixing the nut 2; a plurality of connecting plates 14, one end of any connecting plate 14 is arranged on the first fixed plate 10, and the other end is arranged on the second fixed plate 12, and the plurality of connecting plates 14 are arranged at intervals.

[0042] In this embodiment, the locking device 1 is composed of the first fixed plate 10, the second fixed plate 12 and the plurality of connecting plates 14 arranged at intervals. This structural embodiment has the following technical effects: first, through the cooperation of the first fixed plate 10 and the second fixed plate 12, the nut 2 can be stably fixed, providing a reliable support basis for the adjustment of the nut 2. Secondly, the interval arrangement of the plurality of connecting plates 14 enables the entire device to more evenly disperse stress when stressed, enhancing the structural stability and carrying capacity of the device, avoiding deformation or damage of the device due to excessive local stress. In addition, this structure also facilitates the adjustment of the position and angle of the nut 2 according to actual needs, improving the flexibility and accuracy of the nut 2 adjustment. At the same time, the structure is simple and compact, facilitating manufacturing and assembly, reducing production cost and maintenance difficulty, and having high practicability and economy.

[0043] In some possible embodiments, as Figure 1 And Figure 4As shown, the second fixing plate 12 includes: a plurality of pin holes 122, which are respectively spaced apart from the side of the nut 2; the locking device 1 also includes: a plurality of fixing pins 16, which are corresponding to the pin holes 122, and the plurality of fixing pins 16 are used to fix the nut 2.

[0044] In this embodiment, the engagement of the pin hole 122 and the fixing pin 16 allows for more precise fixing of the nut 2, preventing displacement or rotation during adjustment and thus improving the reliability and stability of the nut 2's fixation. This fixing method not only enhances the restraint capability of the locking device 1 on the nut 2 but also makes the installation and removal of the nut 2 more convenient and quick, improving work efficiency. Furthermore, the embodiment with multiple pin holes 122 can be flexibly adjusted according to the size and shape of the nut 2, enhancing the versatility and adaptability of the device, making it suitable for nuts 2 of different specifications and models, further expanding the application range of the locking device 1.

[0045] In some possible embodiments, such as Figure 2 As shown, the second fixing plate 12 also includes a first through hole 124, which is circular and the diameter of the first through hole 124 is smaller than the diameter of the inscribed circle of the nut 2.

[0046] In this embodiment, the first through hole 124 provides a positioning space for the nut 2, allowing it to be placed more stably on the second fixing plate 12, further enhancing the fixing effect of the nut 2. Since the diameter of the first through hole 124 is smaller than the inscribed circle diameter of the nut 2, the nut 2 cannot pass through the through hole, effectively preventing the nut 2 from falling off the second fixing plate 12 during adjustment, thus improving the safety and reliability of the device. Furthermore, this embodiment can also restrict the axial position of the nut 2, ensuring that the nut 2 remains on the same axis during adjustment, improving the accuracy and consistency of the nut 2 adjustment, which is of great significance for applications requiring high-precision nut 2 adjustment.

[0047] In some possible embodiments, such as Figure 3 As shown, the second fixing plate 12 includes a second through hole 126, which is adapted to the shape of the nut 2.

[0048] In this embodiment, the second through hole 126 is adapted to the shape of the nut 2, allowing the nut 2 to be more tightly embedded in the second fixing plate 12, thereby achieving precise fixing and positioning of the nut 2. This tight fit not only improves the stability of the nut 2, but also effectively prevents the nut 2 from shifting or deviating during adjustment, ensuring the accuracy and reliability of the nut 2 adjustment. In addition, the adapted second through hole 126 can also protect the outer surface of the nut 2, avoiding unnecessary friction or collision between the nut 2 and the second fixing plate 12 during installation, adjustment or disassembly, thereby prolonging the service life of the nut 2 and reducing the maintenance cost of the equipment. At the same time, this embodiment also makes the locking device 1 better adapt to nuts 2 of different shapes and sizes, improving the versatility and applicability of the device.

[0049] In some possible embodiments, the second fixing plate 12 is circular, and the plurality of connecting plates 14 are arranged along the diameter of the second fixing plate 12.

[0050] In this embodiment, first of all, the circular second fixing plate 12 has good symmetry and uniformity, making the stress of the locking device 1 more balanced in all directions, further enhancing the structural stability and load capacity of the device. Secondly, the connecting plates 14 are arranged along the diameter of the second fixing plate 12, which not only makes full use of space and improves the compactness of the device, but also allows the connecting plates 14 to distribute stress more evenly, further improving the strength and reliability of the device. In addition, this structure also facilitates processing and assembly, reducing production cost and difficulty. At the same time, the circular second fixing plate 12 and the connecting plates 14 arranged along the diameter also make the locking device 1 have better appearance and symmetry, meeting the requirements of engineering aesthetics and improving the overall quality and market competitiveness of the product.

[0051] In some possible embodiments, the locking device 1 further comprises a sleeve joint 18 arranged on the first fixing plate 10.

[0052] In this embodiment, the arrangement of the sleeve joint 18 provides a connection interface for the locking device 1 to connect with external tools (such as torque wrenches), making it easier for operators to use tools to adjust and operate the nut 2. Through the sleeve joint 18, the torque of the external tool can be transmitted to the locking device 1, thereby achieving precise adjustment of the nut 2 and improving the efficiency and accuracy of the nut 2 adjustment. In addition, the embodiment of the sleeve joint 18 can also improve the versatility and compatibility of the locking device 1, allowing it to be used with various types of external tools, further expanding the application range of the locking device 1. At the same time, the arrangement of the sleeve joint 18 also makes the structure of the locking device 1 more complete and compact, improving the overall performance and reliability of the device.

[0053] In some possible embodiments, as shown in Figure 6 The first fixed plate 10 is provided with a third through hole 102, and the sleeve joint 18 comprises a first connecting section 182 arranged in the third through hole 102.

[0054] In this embodiment, the third through hole 102 provides a mounting space for the first connecting section 182 of the sleeve joint 18, so that the sleeve joint 18 can be more stably mounted on the first fixed plate 10, and the connection strength and reliability between the sleeve joint 18 and the first fixed plate 10 are enhanced. The first connecting section 182 is arranged in the third through hole 102, which not only ensures the stability of the sleeve joint 18 during use, but also prevents the sleeve joint 18 from loosening or falling off when subjected to external force, thereby improving the overall performance and safety of the locking device 1. In addition, this embodiment can also accurately adjust the position of the sleeve joint 18, ensuring that the connection between the sleeve joint 18 and the external tool is more tight and reliable, further improving the accuracy and efficiency of the nut 2 adjustment.

[0055] In some possible embodiments, as shown in Figure 7 The sleeve joint 18 further comprises a joint section 184, and the outer shape of the joint section 184 is adapted to the outer shape of the torque wrench.

[0056] In this embodiment, the adaptability of the joint section 184 to the outer shape of the torque wrench enables the locking device 1 to achieve a more tight and reliable connection with the torque wrench, thereby improving the efficiency and accuracy of the nut 2 adjustment. Through the adapted joint section 184, it can be ensured that the torque of the torque wrench can be more accurately transmitted to the locking device 1, thereby realizing the accurate adjustment of the nut 2, meeting the requirements of different occasions for the adjustment accuracy of the nut 2. In addition, the adapted joint section 184 can also improve the versatility and compatibility between the locking device 1 and the torque wrench, so that it can be used with various types of torque wrenches, further expanding the application range of the locking device 1. At the same time, this embodiment also makes the operation of the locking device 1 more convenient and fast, reduces the labor intensity of the operator, and improves the work efficiency.

[0057] In some possible embodiments, the adjusting nut 2 is installed on the hinged frame 3 assembly, and the transmission shaft is in the middle of the adjusting nut 2 and extends for a certain distance. First, the fixing pin 16 of the locking device 1 is aligned with the pin hole 122 of the adjusting nut 2, and the second fixing plate 12 is attached to the end face of the adjusting nut 2, and the locking operation is prepared. When using an electric torque wrench, the sleeve of the electric torque wrench is installed on the sleeve joint 18, the electric torque wrench is started, and the locking device 1 is rotated and locked along with the continuous rotation of the sleeve of the electric torque wrench. When the locking force of the electric torque wrench is reached, it is removed, the manual torque wrench is adjusted to the required torque value, and is installed on the sleeve joint 18 to perform the final locking and torque checking. When there is no electric torque wrench on site, a crowbar can be used for locking. The crowbar is inserted into the gap between the second fixing plate 12 and the first fixing plate 10 and clamped on the two connecting plates 14 in symmetrical positions, and the first fixing plate 10 limits the crowbar from slipping from the side to ensure safe operation. At this time, the crowbar is moved to rotate a certain angle, then the crowbar is pulled out and reinserted into the appropriate position, the crowbar is moved again, and the above operation is repeated until the adjusting nut 2 is locked. The crowbar is removed, and the final locking and torque checking are completed by using the manual torque wrench. The manual torque wrench can also be directly used for locking operation and torque checking.

[0058] The locking device 1 is designed with a sleeve joint 18, which can be used for continuous assembly operation by using an electric torque wrench, thereby improving the assembly efficiency and reducing the labor intensity of workers.

[0059] In the case of limited customer site conditions, such as using a crowbar to lock, the crowbar can prevent slipping and ensure personnel safety. After locking, the torque wrench can be used to check the locking torque to ensure the assembly quality.

[0060] According to the second aspect of the utility model, a hinged frame 3 is further provided, which comprises the locking device 1 provided in any of the technical solutions of the first aspect.

[0061] In the technical solution, the hinged frame 3, as shown in Figure 8 and Figure 9 , comprises the locking device 1 provided in any of the technical solutions of the first aspect, and thus has all the technical effects of the locking device 1 of the first aspect.

[0062] According to the third aspect of the utility model, a hinged vehicle is further provided, which comprises the hinged frame 3 provided in the second aspect.

[0063] In the technical solution, the hinged vehicle comprises the hinged frame provided in the second aspect, and thus has all the technical effects of the hinged frame of the second aspect.

[0064] The additional aspects and advantages of the utility model will become apparent in the following description part, or will be known through the practice of the utility model.

[0065] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0066] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0067] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0068] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A locking device, characterized in that The locking device comprises: a first fixed plate; a second fixed plate for fixing the nut; a plurality of connecting plates, one end of any connecting plate is arranged on the first fixed plate, and the other end is arranged on the second fixed plate, and the plurality of connecting plates are arranged at intervals.

2. The locking device of claim 1, wherein The second fixed plate comprises a plurality of pin holes, and the plurality of pin holes are arranged at intervals corresponding to the side surfaces of the nut. The locking device further comprises a plurality of fixed pins corresponding to the pin holes, and the plurality of fixed pins are used for fixing the nut.

3. The locking device of claim 2, wherein The second fixed plate further comprises a first through hole, the first through hole is circular, and the diameter of the first through hole is smaller than the diameter of the inscribed circle of the nut.

4. The locking device of claim 1, wherein The second fixed plate comprises a second through hole, and the second through hole is adapted to the shape of the nut.

5. The locking device according to any one of claims 1 to 4, characterized in that The second fixed plate is circular, and the plurality of connecting plates are arranged at intervals along the diameter of the second fixed plate.

6. The locking device according to any one of claims 1 to 4, characterized in that Further comprising: a sleeve joint arranged on the first fixed plate.

7. The locking device of claim 6, wherein The first fixed plate is provided with a third through hole, and the sleeve joint comprises a first connecting section arranged in the third through hole.

8. The locking device of claim 6, wherein, The sleeve joint further comprises a joint section, and the shape of the joint section is adapted to the shape of the torque wrench.

9. An articulating frame, characterized by Comprising: The locking device according to any one of claims 1 to 8.

10. An articulating vehicle characterized by, Comprising: The articulated frame according to claim 9.