Locking nut

Abstract

The utility model relates to the technical field of nuts, and discloses a locking nut which comprises an oil cylinder piston rod, a threaded rod, a connecting plate and a locking thread sleeve, the threaded rod is fixedly connected to the side wall of the oil cylinder piston rod and used for providing a connecting platform and transmitting axial force, the connecting plate is arranged on the outer wall of the threaded rod in a sleeved mode, and the locking thread sleeve is fixedly connected to the side wall of the oil cylinder piston rod. The inner wall of the locking threaded sleeve is provided with threads and meshed with threads on the outer wall of the threaded rod, the side wall of the locking threaded sleeve is fixedly connected with a sleeve column and a locking nut, and the inner wall of the locking threaded sleeve is provided with threads and meshed with threads on the outer wall of the threaded rod. According to the locking nut, when the locking nut is used, the threaded rod is sleeved with the locking threaded sleeve, the connecting plate and the locking nut body in sequence to the proper positions, in the screwing process, the taper groove is extruded by the taper slope, the sleeve column is forced to expand in the radial direction, expansion force is generated, thread friction force is increased, and the effect of preventing the locking threaded sleeve and the nut body from loosening in the working process is achieved; the problem that a traditional nut is prone to loosening is solved, and connection reliability and stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nut technical field especially relates to a locking nut. BACKGROUND

[0002] In the mine and tunnel concrete spraying operation, the stable operation of equipment is related to the engineering progress and construction safety, the oil cylinder piston rod is as a key component, and the stability of the connecting part is very important, and the connecting locking nut used on the oil cylinder piston rod is one of the core elements guaranteeing the normal operation of the whole equipment. Because the mine and tunnel operation environment is complex, the equipment will bear strong vibration, impact and various complex stress in the running process, which puts forward very high requirements on the performance of the locking nut, and it is an urgent need to develop a locking nut that can adapt to harsh working conditions and ensure firm and reliable connection to promote the technical progress of the mine and tunnel concrete spraying equipment.

[0003] The traditional nut used for connecting the oil cylinder piston rod mostly adopts ordinary thread fastening mode, and the structure is simple, that is, the threaded part of the piston rod is directly screwed into a standard nut, and the fastening is realized through the friction force between the nut and the thread. The technical principle of this connection mode is based on simple thread engagement, and it can play a certain role in the relatively stable and less vibrating environment. However, in the complex and harsh working environment of mine and tunnel, its limitations gradually become apparent.

[0004] In the actual operation of the mine and tunnel concrete spraying equipment, the traditional nut has the problem of easy loosening. Due to the strong and continuous vibration in the working environment and the repeated action of complex external force, the friction force generated by ordinary thread connection is difficult to maintain the fastening state of the nut for a long time. With the passage of time, the nut will gradually loosen, resulting in a gap in the connecting part of the oil cylinder piston rod, which not only affects the stability of the equipment operation, reduces the accuracy and efficiency of concrete spraying, but also causes more serious safety hazards. Therefore, a locking nut is proposed to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] In order to make up for the above shortcomings, the utility model provides a locking nut, which aims at improving the problem of easy loosening of the nut in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A locking nut, comprising:

[0008] An oil cylinder piston rod and a threaded rod, the threaded rod is fixedly connected to the side wall of the oil cylinder piston rod, and the threaded rod is used to provide a connecting platform and transmit axial force;

[0009] A connecting plate sleeved on the outer wall of the threaded rod for connecting external components and transmitting load;

[0010] A lock nut with a threaded inner wall threadedly engaged with the outer wall of the threaded rod for initially fixing the connecting plate and providing support, and axially displaceable along the threaded rod, the side wall of the lock nut being fixedly connected with a sleeve column for cooperating with the lock nut to realize the anti-loosening function;

[0011] A lock nut with a threaded inner wall threadedly engaged with the outer wall of the threaded rod for initially fixing the connecting plate and providing support, and axially displaceable along the threaded rod, the side wall of the lock nut being fixedly connected with a sleeve column for cooperating with the lock nut to realize the anti-loosening function;

[0012] As a further description of the above technical solutions:

[0013] The connecting plate is slidingly connected to the outer wall of the sleeve column, and is located between the side walls of the lock nut and the lock nut.

[0014] As a further description of the above technical solutions:

[0015] The outer wall of the sleeve column is provided with a taper slot, which is a straight line and has a taper.

[0016] As a further description of the above technical solutions:

[0017] The lock nut is internally provided with a tapered slope, and the angle range of the slope is 5° to 15°.

[0018] As a further description of the above technical solutions:

[0019] The tapered slope of the lock nut cooperates with the taper slot of the sleeve column to cause the sleeve column to radially expand by extrusion, thereby generating a tightening force.

[0020] The utility model has the following beneficial effects:

[0021] In the utility model, when the lock nut is used, the lock nut is screwed into the piston rod to a suitable position, the connecting plate is sleeved and slid to the outer wall of the sleeve column of the lock nut, then the lock nut is screwed into the piston rod, the tapered slope of the inner wall extrudes the tapered slot of the outer wall of the sleeve column, forcing the sleeve column to radially expand, generating a tightening force and increasing the friction force of the threads, thereby preventing the lock nut and the nut from loosening during work, solving the problem of easy loosening of the traditional nut and improving the connection reliability and stability. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A side view of the lock nut of the utility model is provided.

[0023] Figure 2This is an exploded view of a locking nut proposed in this utility model;

[0024] Figure 3 This is a cross-sectional view of a locking nut locking sleeve structure proposed in this utility model;

[0025] Figure 4 This is a top view of a locking nut locking sleeve structure proposed in this utility model;

[0026] Figure 5 This is a bottom view of a locking nut locking sleeve structure proposed in this utility model;

[0027] Figure 6 This is a cross-sectional view of a locking nut structure for a locking nut proposed in this utility model;

[0028] Figure 7 This is a top view of a locking nut structure for a locking nut proposed in this utility model.

[0029] Legend:

[0030] 1. Cylinder piston rod; 2. Threaded rod; 3. Connecting plate; 4. Locking nut; 5. Sleeve; 6. Locking nut; 7. Tapered groove; 8. Tapered ramp. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1-7The utility model provides an embodiment: a locking nut, include: oil cylinder piston rod 1 and threaded rod 2, oil cylinder piston rod 1 is responsible for transmitting power and executes corresponding mechanical action in hydraulic system, threaded rod 2 fixedly connected in oil cylinder piston rod 1 side wall, threaded rod 2 is used for providing connecting platform and transmitting axial force, its function is to provide the basis for installation and connection for other components, realize the relative displacement and fixed between components through screw thread cooperation, connecting plate 3, connecting plate 3 is sleeved in threaded rod 2 outer wall, locking nut 4, its inner wall is equipped with screw thread, and is engaged with threaded rod 2 outer wall screw thread, can axial displacement along threaded rod 2, locking nut 4 side wall fixedly connected with sleeve column 5, the function of sleeve column 5 is cooperation with locking nut 6, generates the expansion force in locking process, strengthens the stability of whole locking structure, locking nut 6, its inner wall is equipped with screw thread, and is engaged with threaded rod 2 outer wall screw thread, can axial displacement along threaded rod 2 to sleeve column 5 outer wall, locking nut 4, sleeve column 5 and locking nut 6 are made of 42CrMoA alloy steel material, connecting plate 3 slidingly connects in sleeve column 5 outer wall, connecting plate 3 is located between locking nut 4 and locking nut 6 side wall, the taper groove 7 is set up in sleeve column 5 outer wall, the taper groove 7 is a character and has taper, its design is to when being extruded by locking nut 6, can make sleeve column 5 produce radial expansion, locking nut 6 inside sets up taper slope 8, the taper slope 8 its bevel angle range is 5 to 15, this angle range can when cooperation with the taper groove 7 of sleeve column 5, produce suitable extrusion pressure, make sleeve column 5 radial expansion, the taper slope 8 of locking nut 6 cooperates with the taper groove 7 of sleeve column 5, makes sleeve column 5 radial expansion through extrusion, produces expansion force, thereby increases the friction between locking nut 6 and oil cylinder piston rod 1, prevents locking nut 4 and locking nut 6 loose;

[0033] Specifically, in the use of the locking nut, first, the worker aligns the center hole of the locking sleeve 4 with the threaded rod 2, and then puts the locking sleeve 4 on the outer wall of the threaded rod 2. Then, the worker uses a tool to clamp the outer wall of the locking sleeve 4 and rotates the locking sleeve 4. Since the inner wall of the locking sleeve 4 is threaded with the threads on the outer wall of the threaded rod 2, during the rotation, the locking sleeve 4 is displaced along the axial direction of the threaded rod 2 from one end of the threaded rod 2 to the appropriate position. After the locking sleeve 4 is rotated and displaced to the appropriate position that meets the installation requirements, the worker picks up the connecting plate 3, aligns the center hole of the connecting plate 3 with the threaded rod 2, and then puts the connecting plate 3 on the outer wall of the threaded rod 2. The worker manually pushes the connecting plate 3 to make it slide along the axial direction of the threaded rod 2 from one end of the threaded rod 2 to the outer wall of the sleeve column 5 of the side wall of the locking sleeve 4 until the connecting plate 3 is tightly attached to the outer wall of the sleeve column 5. Then, the worker aligns the center hole of the locking nut 6 with the threaded rod 2, and then puts the locking nut 6 on the outer wall of the threaded rod 2. Then, the worker uses a tool to clamp the outer wall of the locking nut 6 and rotates the locking nut 6 to displace from one end of the threaded rod 2 to the outer wall of the sleeve column 5. As the rotation continues, the locking nut 6 gradually approaches the sleeve column 5 until the outer wall of the sleeve column 5 is embedded in the inner wall of the locking nut 6. At this time, the tapered slope 8 of the inner wall of the locking nut 6 begins to contact and interact with the tapered groove 7 of the outer wall of the sleeve column 5. As the locking nut 6 continues to rotate, the tapered slope 8 exerts a squeezing force on the tapered groove 7. Under the action of this squeezing force, the tapered groove 7 of the outer wall of the sleeve column 5 is deformed. This deformation increases the radial dimension of the sleeve column 5, generates a bulging force, and the bulging force of the sleeve column 5 acts between the locking nut 6 and the oil cylinder piston rod 1, increasing the friction between the locking nut 6 and the oil cylinder piston rod 1. This achieves the effect of preventing the locking sleeve 4 and the locking nut 6 from being easily loosened on the oil cylinder piston rod 1, ensuring the stability and reliability of the entire connecting structure during use.

[0034] Working principle: when using the locking nut, first, the staff will be locked in the nut 4 in the cylinder piston rod 1 front end of the threaded rod 2 outer wall, and use the tool to rotate the locking nut 4, the locking nut 4 is rotated to the appropriate position under the action of the thread on the inner wall of the locking nut 4 and the thread of the threaded rod 2, at this time, the staff will be connected to the plate 3 in the threaded rod 2 outer wall, and slide to the outside of the sleeve column 5 of the locking nut 4 side wall, then the locking nut 6 is sleeved on the threaded rod 2 outer wall, and the locking nut 6 is rotated under the action of the thread on the inner wall of the locking nut 6 and the thread of the threaded rod 2 outer wall, the locking nut 6 is displaced to the outside of the sleeve column 5, so that the sleeve column 5 outside wall is embedded in the inner wall of the locking nut 6, at this time, under the extrusion of the taper slope 8 on the inner wall of the locking nut 6, the taper groove 7 on the outer wall of the sleeve column 5 is deformed, so that the radial expansion of the sleeve column 5 generates the expansion force, so that the friction between the locking nut 6 and the cylinder piston rod 1 increases, so as to prevent the locking nut 4 and the locking nut 6 from being loose on the cylinder piston rod 1.

[0035] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and not for limiting the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or make equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A lock nut characterized by, The utility model relates to a kind of threaded rod and locking nut locking structure, including: Oil cylinder piston rod (1) and threaded rod (2), the threaded rod (2) is fixedly connected in the side wall of the oil cylinder piston rod (1), and the threaded rod (2) is used to provide connection platform and transmit axial force; Connecting plate (3), the connecting plate (3) is sleeved on the outer wall of the threaded rod (2), for connecting external components and transmitting load; Locking nut (4), its inner wall is provided with thread, and the outer wall of the threaded rod (2) is threadedly engaged, for primarily fixed the connecting plate (3) and provide support, can be axially displaced along the threaded rod (2); Locking nut (6), its inner wall is provided with thread, and the outer wall of the threaded rod (2) is threadedly engaged, the side wall of the locking nut (4) is fixedly connected with sleeve column (5), for cooperating with the locking nut (6) and realizing anti-loose function, the locking nut (6) can be axially displaced to the outer wall of the sleeve column (5) along the threaded rod (2), for generating radial expansion force by extruding sleeve column (5), increase friction force.

2. A lock nut according to claim 1, wherein: The connecting plate (3) is slidably connected to the outer wall of the sleeve column (5), and the connecting plate (3) is located between the side walls of the locking nut (4) and the locking nut (6).

3. A lock nut according to claim 2, wherein: The outer wall of the sleeve column (5) is provided with a taper groove (7), which is a one-letter shape and has a taper.

4. A lock nut according to claim 2, wherein: The locking nut (6) is internally provided with a taper slope (8), and the taper slope (8) has an angle range of 5° to 15°.

5. A lock nut according to claim 4, wherein: The taper slope (8) of the locking nut (6) cooperates with the taper groove (7) of the sleeve column (5) to make the sleeve column (5) radially expand by extrusion, generating expansion force.

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