Lock nut and connecting structure

Abstract

The utility model relates to the technical field of connecting devices, and discloses a locknut and a connecting structure, which are mainly characterized in that the inner side of the locknut is provided with a concave notch ring, the lower side part of the notch ring forms an abutting table, the upper side part of the notch ring is provided with a screw hole, and the screw hole is connected with the notch ring. And an anti-loosening bolt is screwed on the screw hole, is propped against the propping table and applies outward turning force to the upper side of the notch ring. According to the lock nut provided by the utility model, the concave notch ring is arranged on the inner side of the lock nut, the lower side part of the notch ring forms the abutting table, the screw hole is formed in the upper side part of the notch ring, and the lock bolt is screwed on the screw hole, abuts against the abutting table and applies outward turning force to the upper side of the notch ring; and the anti-loosening effect of the anti-loosening nut can be effectively enhanced. According to the lock nut connecting structure provided by the utility model, the lock nut is combined with the stop gland, so that the lock nut can be better prevented from loosening and falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of connection devices, in particular to a locking nut and a connection structure. Background Art

[0002] In the prior art, the installation method of saw blades and other processing tools and the motor output shaft is mostly: first, the processing tool is placed on the output shaft of the motor, and then locked and fixed with a locking nut; in order to reduce the safety hazards caused by loosening or falling off of the locking nut, anti-loosening structures such as anti-loosening washers are sometimes required.

[0003] A Chinese utility model with publication number CN218363357U discloses a saw blade anti-loosening clamping device, comprising a motor, a fixed plate, a pressure plate, a saw blade, and a locking screw. The fixed plate, saw blade, and pressure plate are sequentially sleeved on the main shaft of the motor from the inside to the outside. The main shaft of the motor is provided with a threaded hole, the center line of which coincides with the rotation center line of the main shaft. The locking screw is fastened to the main shaft and is located on the outside of the pressure plate. A common flat key is embedded between the main shaft, the fixed plate, and the pressure plate, and the flat key is arranged along the axial direction of the main shaft. Although the saw blade anti-loosening clamping device designed in this utility model has a certain anti-loosening effect, for high-speed motors, due to the high speed and large rotational force, there is still a risk of the processing tool loosening or even falling off when the motor is stalled. Utility Model Content

[0004] The purpose of the present invention is to provide a locking nut and a connection structure with better anti-loosening and anti-falling effects, so as to at least provide a beneficial choice or create conditions for solving one or more technical problems existing in the prior art.

[0005] In order to achieve the above objectives, the present utility model adopts the following technical solutions.

[0006] A locking nut, the main innovation of which is that a recessed notch ring is provided on the inner side of the locking nut, the lower part of the notch ring constitutes an abutment platform, and a screw hole is provided on the upper part of the notch ring. A locking bolt is screwed into the screw hole to abut against the abutment platform and apply an outward turning force to the upper side of the notch ring.

[0007] More preferably, the anti-loosening nut is a metal nut, and the screw holes are evenly distributed on the annular surface of the anti-loosening nut or the screw holes are distributed on half of the annular surface of the anti-loosening nut.

[0008] More preferably, a slot penetrating the side wall is provided on the anti-loosening nut, and the slot is used to separate two adjacent screw holes.

[0009] More preferably, a dent corresponding to the position of the screw hole is provided on the outer surface of the anti-loosening nut, the dent is located on the lower side of the notch ring, and the dent is perpendicular to the axial direction of the anti-loosening nut.

[0010] More preferably, one to three indentations are provided corresponding to each screw hole, and the indentations corresponding to the same screw hole are parallel to each other.

[0011] More preferably, the cross section of the indentation is triangular, and the opening angle of the indentation is 40-70°.

[0012] More preferably, the thickness of the upper portion of the notch ring is not less than 5 mm.

[0013] More preferably, the anti-loosening nut has two types: a positive thread anti-rotation nut or a negative thread anti-rotation nut.

[0014] On the other hand, the utility model also provides a locking nut connection structure, which has a locking nut as described above, and a stop cover, and the stop cover is pressed against the locking bolt installation surface of the locking nut after the locking nut is installed.

[0015] More preferably, the stop cover includes a cover portion and a shaft end portion, the cover portion is used to tighten the anti-loosening nut, and the shaft end portion is connected to the threaded shaft on which the anti-loosening nut is installed; a threaded hole consistent with its axis is provided on the threaded shaft, and a through hole penetrating the shaft end and corresponding to the threaded hole is provided on the stop cover, and a locking screw passes through the through hole to tighten and fix the stop cover on the threaded shaft; a mutually cooperating anti-rotation structure is provided between the shaft end portion and the threaded shaft.

[0016] The present invention adopts the above technical solution, which has at least the following beneficial effects.

[0017] 1. The utility model provides a locking nut, which has a recessed notch ring on the inner side of the locking nut, the lower side of the notch ring forming a rest platform, and a screw hole on the upper side of the notch ring. A locking bolt is screwed into the screw hole to rest against the rest platform and exert an outward turning force on the upper side of the notch ring, thereby effectively enhancing the locking effect of the locking nut.

[0018] Second, the present invention provides a locking nut connection structure that combines a locking nut with a stopper gland to better prevent the locking nut from loosening or falling off. Actual production testing has shown that when the locking nut connection structure is applied to a high-speed motor, it will not loosen even when the stall force is increased to 1200N, providing excellent locking and vibration prevention effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1Shown is a schematic structural diagram of the anti-loosening nut provided by the utility model.

[0020] Figure 2 Shown is a schematic structural diagram of the anti-loosening nut from another perspective.

[0021] Figure 3 Shown is a cross-sectional view of the locknut.

[0022] Figure 4 Shown is a schematic structural diagram of the stop cover.

[0023] Figure 5 Shown is a schematic structural diagram of the stop cover from another perspective.

[0024] Figure 6 Shown is a cross-sectional view of the stop gland.

[0025] Figure 7 Shown is a specific application schematic diagram of the anti-loosening nut connection structure provided by the utility model.

[0026] Description of the accompanying drawings.

[0027] 1: Motor, 2: Processing tool, 3: Lock nut, 4: Stop cover, 5: Fixed plate, 6: Pressure plate.

[0028] 1-1: Output shaft.

[0029] 3-1: abutment, 3-2: screw hole, 3-3: slot, 3-4: indentation.

[0030] 4-1: gland part, 4-2: shaft end, 4-3: through hole. DETAILED DESCRIPTION

[0031] In order to facilitate those skilled in the art to better understand the essence of the present invention, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Reference Figure 7 As shown, a locking nut connection structure includes a motor 1, a processing tool 2, a locking nut 3 and a stop cover 4. The processing tool 2 is sleeved on the output shaft 1-1 of the motor 1, the locking nut 3 is screwed on the output shaft 1-1 and presses and fixes the processing tool 2, and the stop cover 4 is connected to the output shaft 1-1 and presses on the outside of the locking nut 3.

[0033] In this embodiment, the processing tool 2 is preferably a saw blade, with a fixed plate 5 and a pressure plate 6 disposed on the inner and outer sides of the saw blade, respectively, for coupling with the motor output shaft. The specific assembly structure of the fixed plate 5, pressure plate 6, and saw blade is common knowledge known to those skilled in the art and will not be further described here. Of course, the processing tool is not limited to the saw blades exemplified above; it may also be other processing tools such as a grinding disc, and is not limited to this embodiment. Obviously, the output shaft 1-1 may be another threaded shaft, and is not limited to this embodiment.

[0034] Reference Figure 1-Figure 3 As shown, a notch ring is provided on the inner side of the anti-loosening nut 3, the lower part of the notch ring constitutes abutment 3-1, and a screw hole 3-2 is provided on the upper part of the notch ring. A anti-loosening bolt is screwed on the screw hole and abuts against the abutment 3-1 and applies an outward turning force to the upper side of the notch ring, thereby causing the screw thread on the upper side of the notch ring to have an outward turning deformation; the purpose of preventing loosening is achieved by the outward turning deformation of the screw thread.

[0035] In this embodiment, the locknut 3 is preferably a metal nut. This provides a high degree of rigidity to the thread, and its outward deformation can generate a strong anti-loosening force, achieving excellent anti-loosening effects, meeting the requirements for preventing loosening in high-speed motors running at speeds of 10,000 rpm and above. Actual testing has shown that the use of the medium locknut in this utility model will not cause loosening even when the locking force is increased by five times, achieving excellent anti-loosening and anti-vibration effects.

[0036] In this embodiment, the locknut 3 has an outer diameter of 51 mm and an inner diameter of 30 mm. The recessed depth of the notched ring is 7.5 mm (the wall thickness of the locknut at the location of the notched ring is 3 mm) to facilitate deformation. The thickness of the upper portion of the notched ring is preferably not less than 5 mm to ensure sufficient deformed threads to prevent loosening. Preferably, there are six screw holes 3-2, evenly distributed on the annular surface of the locknut 3. Preferably, the locknut 3 is provided with slots 3-3 extending through the sidewall, with six slots 3-3 separating adjacent screw holes 3-2. This allows for better deformation of the threads when a deforming force is applied by the lockbolt. In some embodiments, the number of screw holes 3-2 can be two, three, four, or any other number, as appropriate for those skilled in the art based on practical needs. In some embodiments, the slots 3-3 can also be omitted, not limited to this embodiment.

[0037] In this embodiment, the outer surface of the locknut 3 is preferably further provided with an indentation 3-4 corresponding to the location of the screw hole 3-2. The indentation 3-4 is located on the lower side of the gap ring. The provision of the indentation 3-4 makes the upper side of the gap ring more susceptible to deformation by the lockbolt. One to three indentations 3-4 may be provided for each screw hole 3-2, and the indentations 3-4 corresponding to the same screw hole 3-2 are parallel to each other.

[0038] In this embodiment, the indentations 3-4 preferably have a triangular cross-section, an opening angle of 60°, and a depth of 1 mm. Obviously, those skilled in the art may adjust the opening angle and depth of the indentations as needed, such as selecting an opening angle between 40° and 70° and a depth between 0.5 and 3 mm.

[0039] It should be noted that the locknut 3 has two types: a positive thread locknut and a negative thread locknut. The corresponding locknut is selected according to the rotation direction of the motor.

[0040] Combine Figure 4-Figure 6 As shown, the stop cover 4 includes a cover portion 4-1 and a shaft end portion 4-2, the cover portion 4-1 is used to tighten the anti-loosening nut 3, and the shaft end portion 4-2 is connected and fixed to the output shaft 1-1; a threaded hole consistent with its axis is provided on the output shaft 1-1, and a through hole 4-3 passing through the shaft end portion 4-2 and corresponding to the threaded hole is provided on the stop cover 4, and a locking screw passes through the through hole 4-3 to tighten the stop cover 4 on the output shaft 1-1, thereby achieving the purpose of tightening the anti-loosening nut 3.

[0041] The advantage of the above-mentioned stop cover connection method is that it is convenient to set up a mutually cooperating anti-rotation structure between the shaft end 4-2 and the output shaft 1-1, such as setting the shaft end 4-2 into a polygonal prism shape, and providing a groove on the output shaft 1-1 that fits with the polygonal prism-shaped shaft end. In this way, relative rotation between the stop cover 4 and the output shaft 1-1 is avoided, ensuring the anti-loosening effect.

[0042] In some embodiments, anti-rotation may also be achieved by providing a polygonal prism-shaped groove on the shaft end 4 - 2 and a polygonal prism provided on the output shaft 1 - 1 , which is not limited to this embodiment.

[0043] Obviously, the installation method of the stop cover 4 is not limited to the above examples. In some embodiments, the stop cover 4 and the output shaft 1-1 are connected by mutually matching threaded columns and threaded holes. During assembly, the stop cover 4 is directly screwed onto the output shaft 1-1 through the shaft end 4-2; it is not limited to this embodiment.

[0044] It should be noted that, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A lock nut, characterized in that: A recessed notch ring is provided on the inner side of the anti-loosening nut, the lower part of the notch ring constitutes a supporting platform, and a screw hole is provided on the upper part of the notch ring. A anti-loosening bolt is screwed into the screw hole to abut against the supporting platform and apply an outward turning force to the upper side of the notch ring.

2. A lock nut according to claim 1, characterized in that: The anti-loosening nut is a metal nut, and the screw holes are evenly distributed on the annular surface of the anti-loosening nut or the screw holes are distributed on half of the annular surface of the anti-loosening nut.

3. The anti-loosening nut according to claim 1, characterized in that: A slot penetrating the side wall is provided on the anti-loosening nut, and the slot is used to separate two adjacent screw holes.

4. The anti-loosening nut according to claim 1, characterized in that: A dent corresponding to the position of the screw hole is provided on the outer surface of the anti-loosening nut, the dent is located on the lower side of the notch ring, and the dent is perpendicular to the axial direction of the anti-loosening nut.

5. The anti-loosening nut according to claim 4, characterized in that: One to three indentations are provided corresponding to each screw hole, and the indentations corresponding to the same screw hole are parallel to each other.

6. A lock nut according to claim 4 or 5, characterized in that: The cross section of the indent is triangular, and the opening angle of the indent is 40-70°.

7. The anti-loosening nut according to claim 1, characterized in that: The thickness of the upper portion of the notch ring is not less than 5 mm.

8. The anti-loosening nut according to claim 1, characterized in that: The anti-loosening nut has two types: a positive thread anti-rotation nut or a negative thread anti-rotation nut.

9. A locking nut connection structure, characterized in that: A locknut as claimed in any one of claims 1 to 8, and a stop cover, wherein the stop cover is pressed against the locknut bolt installation surface after the locknut is installed.

10. The anti-loosening nut connection structure according to claim 9, characterized in that: The stop cover includes a cover portion and a shaft end portion, the cover portion is used to tighten the anti-loosening nut, and the shaft end portion is connected to the threaded shaft on which the anti-loosening nut is installed; a threaded hole consistent with its axis is provided on the threaded shaft, and a through hole penetrating the shaft end and corresponding to the threaded hole is provided on the stop cover, and a locking screw passes through the through hole to tighten and fix the stop cover on the threaded shaft; an anti-rotation structure that cooperates with each other is provided between the shaft end portion and the threaded shaft.

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