Lock nut

Abstract

The utility model relates to a locknut which comprises a nut body, a flat washer located below the nut body and a spring arranged between the nut body and the flat washer in a compressed mode, the axial direction of the nut body extends up and down, the nut body is provided with a screw hole, and the upper portion of the spring is fixedly connected with the nut body. The lower portion of the spring is fixedly connected with a flat washer, the flat washer is upwards provided with a first limiting piece installed on the nut body in a sliding mode, and the nut body is provided with a limiting inserting block on the rotating track of the first limiting piece. By the adoption of the scheme, the locknut is connected with the flat washer through the spring, and therefore the situation that the locknut and the flat washer are lost in the installation process is avoided.

Description

Technical Field

[0001] The utility model relates to a nut, in particular to a locknut. Background Art

[0002] A nut is a fastener with internal threads, usually used in conjunction with bolts or screws to fasten two or more components together. The basic shape of a nut is usually hexagonal (also known as a hex nut), but there are also other shapes, such as square, round, etc. When the nut is screwed onto the external thread of a bolt or screw, it rotates along the thread and generates an axial force to achieve the fastening effect.

[0003] During the use of a nut, it is usually used in conjunction with a washer. Washers include elastic washers and flat washers. Among them, the elastic washer can provide elastic support force to enhance the anti-loosening effect after the nut is connected to the bolt or screw rod. Because the elastic support force provided by the elastic washer acts on the surface of the fastener, it is necessary to cooperate with a flat washer to increase the contact area of the elastic washer and reduce the pressure on the surface of the fastener. Therefore, the placement order during the installation of the nut is the flat washer, the elastic washer, and finally the nut.

[0004] However, since the nut, the elastic washer, and the flat washer are all independent components, there is a possibility of forgetting the elastic washer or the flat washer when assembling them one by one in sequence. Therefore, how to improve the assembly convenience has become an urgent problem for those skilled in the art. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a locknut that connects the nut and the flat washer together through a spring to avoid omission during the installation process.

[0006] To achieve the above purpose, the utility model provides the following technical solutions: It includes a nut body, the axial direction of the nut body extends vertically, a threaded hole is provided on the nut body, and it also includes a flat washer located below the nut body and a spring compressed between the nut body and the flat washer. The upper part of the spring is fixedly connected to the nut body, the lower part of the spring is fixedly connected to the flat washer, a first limiting member slidably installed on the nut body is arranged upward on the flat washer, and a limiting insert block is arranged on the nut body along the rotation track of the first limiting member.

[0007] The utility model is further arranged as: the flat washer includes a positioning section extending upward in the length direction, an installation groove for the positioning section to be inserted into is provided on the nut body, the spring is located on the positioning section, and the circumference of the positioning section abuts against the nut body.

[0008] The present utility model is further configured such that: the positioning section includes an inner ring and an outer ring, the outer periphery of the inner ring abuts against the inner wall of the spring, and the inner wall of the outer ring abuts against the circumference of the spring.

[0009] The present utility model is further configured such that: a mating ring is provided above the positioning section of the nut body, a mating groove is provided in the mating ring, and the top of the spring is located in the mating groove and fixedly connected to the mating ring.

[0010] The present utility model is further configured such that: the first limiting member is located on the inner ring and is made of a material that is prone to deformation. A second limiting member with the same shape and size as the first limiting member is provided on the outer ring. The first limiting member includes an inserting section and a limiting section located above the inserting section. The mating ring is provided with an inserting groove for the inserting section to be inserted into and a sliding groove for the limiting section to slide up and down. The mating ring further includes a baffle plate at the bottom of the sliding groove, and the upper end surface of the baffle plate abuts against the bottom of the limiting section.

[0011] The present utility model is further configured such that: the limiting section includes a limiting plate, the limiting plate is inclined from left to right from top to bottom, and a deformation groove is provided in the limiting section in the front-back direction.

[0012] The present utility model is further configured such that: the left side of the mating ring abuts against the inserting section, and the right side of the mating ring abuts against the second limiting member.

[0013] By adopting the above technical solutions, 1. Since the spring is compressively arranged between the nut body and the flat washer, during the assembly process, as the spring is installed, the elastic force of the spring itself can act as a reaction force to apply a downward pressure to the flat washer, which can help reduce the phenomenon that the nut loosens by itself due to vibration or other reasons; 2. Placing a spring between the nut and the flat washer can achieve dynamic compensation for the wear of the flat washer: when the flat washer wears due to long-term use, the spring can fill the gap caused by the wear through its own compression, which helps to maintain the close contact between the connecting parts and reduce the possibility of loosening between the parts; 3. Since one end of the spring is fixed to the nut body and the other end is fixed to the flat washer, after the spring is welded and fixed, at this time, the nut body and the flat washer are already connected together by the spring, so it is possible to avoid the possibility that the flat washer is forgotten and dropped during the assembly process, thereby facilitating the assembly of the nut body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0015] Figure 1 Is a perspective view of the specific embodiment of the present invention;

[0016] Figure 2 Is a sectional view of the present invention;

[0017] Figure 3 Is a sectional view of the present invention from another perspective;

[0018] Figure 4 Is a perspective view of the flat washer in the present invention;

[0019] Figure 5 Is a sectional view of the nut body in the present invention;

[0020] Figure 6 Is Figure 2 An enlarged view of A in;

[0021] Figure 7 Is Figure 4 An enlarged view of B in;

[0022] Figure 8 Is Figure 5 An enlarged view of C in.

[0023] In the figure: 1 - nut body, 11 - screw hole, 12 - limiting insertion block, 13 - installation groove, 14 - fitting ring, 141 - fitting groove, 142 - insertion groove, 143 - sliding groove, 144 - baffle;

[0024] 2 - flat washer, 21 - positioning section, 211 - inner ring, 212 - outer ring, 2121 - second limiting member;

[0025] 3 - spring;

[0026] 4 - first limiting member, 41 - insertion section, 42 - limiting section, 421 - limiting plate, 422 - deformation groove. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] As Figures 1-8 shown, the present invention discloses a locknut, including a nut body 1. The axial direction of the nut body 1 extends vertically. A threaded hole 11 is provided on the nut. It also includes a flat washer 2 located below the nut and a spring 3 compressively arranged between the nut and the flat washer 2. The upper part of the spring 3 is fixedly connected to the nut by welding or other means, and the lower part of the spring 3 is fixedly connected to the flat washer 2 by welding or other means. The flat washer 2 is provided with a first limiting member 4 slidably mounted on the nut body 1. A limiting plug 12 is provided on the nut body 1 along the rotation track of the first limiting member 4. 1. Since one end of the spring 3 is fixed to the nut body 1 and the other end is fixed to the flat washer 2, after the welding and fixing of the spring 3 are completed, the nut body 1 and the flat washer 2 are already connected together by the spring 3. Therefore, it is possible to avoid the possibility of the flat washer 2 being forgotten and falling during the assembly process, thus facilitating the assembly of the nut body 1. At the same time, due to the existence of the limiting plug 12 on the nut body 1, during the process of rotating the nut body 1 so that the threaded hole 11 is threadedly engaged with other objects, the limiting plug 12 prevents the first limiting member 4 from rotating, that is, the flat washer 2 cannot rotate relative to the nut body 1. Therefore, the flat washer 2 and the nut can rotate as a whole and be screwed into the object that needs to be assembled with the nut. 2. Since the spring 3 is compressively arranged between the nut body 1 and the flat washer 2, during the assembly process, as the spring 3 is installed, the elastic force of the spring 3 itself can act as a reaction force to apply a downward pressure on the flat washer 2, which can help reduce the phenomenon of the nut loosening by itself due to vibration or other reasons; 23. Placing the spring 3 between the nut and the flat washer 2 can achieve dynamic compensation for the wear of the flat washer 2: when the flat washer 2 wears due to long-term use, the spring 3 can fill the gap caused by the wear through its own compression, which helps to maintain the close contact between the connecting parts and reduce the possibility of loosening between the parts.

[0029] Among them, the flat washer 2 includes a positioning section 21 extending upward in the length direction. The nut body 1 is provided with an installation groove 13 for the positioning section 21 to be inserted. The spring 3 is located on the positioning section 21, and the circumference of the positioning section 21 abuts against the nut body 1. During the assembly process, the positioning section 21 of the flat washer 2 will be located in the installation groove 13 of the nut body 1, so that when the flat washer 2 moves downward under the downward acting force of the spring 3, it can move along the axis of the installation groove 13 in the nut body 1, thus providing a guiding effect for determining the position of the flat washer 2 on the nut body 1.

[0030] Preferably, the positioning section 21 includes an inner ring 211 and an outer ring 212. The outer circumference of the inner ring 211 abuts against the inner wall of the spring 3, and the inner wall of the outer ring 212 abuts against the circumference of the spring 3. Since the inner wall of the spring 3 abuts against the outer circumference of the inner ring 211 on the positioning section 21, and the circumference of the spring 3 abuts against the inner wall of the outer ring 212 on the positioning section 21, after the upper end of the spring 3 is fixed to the nut body 1 and the bottom is fixed to the positioning section 21, when the spring 3 is subjected to an upward pressure and a downward acting force, the deformation direction of the spring 3 can be restricted by the shapes of the inner ring 211 and the outer ring 212. Therefore, the setting of the inner ring 211 and the outer ring 212 can guide the deformation direction of the spring 3.

[0031] Above the positioning section 21, the nut body 1 is provided with a mating ring 14. The mating ring 14 is provided with a mating groove 141. The top of the spring 3 is located in the mating groove 141 and is fixedly connected to the mating ring 14. 1. Since the top of the spring 3 is fixedly installed in the mating groove 141 of the mating ring 14, it can be ensured that the spring 3 will not be displaced or tilted during operation, thereby improving the stability of the connection position between the spring 3 and the nut body 1; 2. Since the upper and lower ends of the spring 3 are respectively fixed to the mating ring 14 and the positioning section 21, after its top is fixed to the mating ring 14, the support for the top of the spring 3 can be removed at this time, which provides convenience for fixing the bottom to the positioning section 21; 3. And compared with nuts on the market, the mating ring 14, as an additional part on the nut body 1, increases the overall stiffness of the nut body 1 and improves the ability of the nut to resist external forces.

[0032] In addition, the first limiting member 4 is located on the inner ring 211 and is made of a deformable material such as rubber. The outer ring 212 is provided with a second limiting member 2121 having the same shape and size as the first limiting member 4. The first limiting member 4 includes an insertion section 41 and a limiting section 42 located above the insertion section 41. The matching ring 14 is provided with an insertion groove 142 for the insertion section 41 to be inserted into and a sliding groove 143 for the limiting section 42 to slide up and down. The matching ring 14 also includes a baffle 144 located at the bottom of the sliding groove 143. The upper end surface of the baffle 144 abuts against the bottom of the limiting section 42. 1. Since the inner ring 211 is provided with a first limit piece 4 slidably installed on the matching ring 14 and the outer ring 212 is provided with a second limit piece 2121, during the process of compression or restoration of the spring 3, the first limit piece 4 and the second limit piece 2121 can slide in the up and down directions to cooperate with the deformation of the spring 3, and the sliding first limit piece 4 and the second limit piece 2121 can realize the movement of the flat washer 2 in the up and down directions and thus stably position it on the object matching with the nut; 2. Since the first limit piece 4 and the second limit piece 2121 can slide in the up and down directions, and the upper end surface of the baffle 144 will abut against the bottom of the limit section 42, the first limit piece 4 and the second limit piece 2121 will not be separated from the nut body 1, so that the nut body 1 can always be connected with the flat washer 2 when put into use, thereby avoiding the possibility of the flat washer 2 being forgotten and not installed.

[0033] Among them, the limiting section 42 includes a limiting plate 421, and the limiting plate 421 is inclined from left to right from top to bottom. A deformation groove 422 is set in the limiting section 42 along the front-to-back direction. Due to the setting of the deformation groove 422, in the process of installing the flat washer 2 to the bottom of the nut body 1, the limiting plate 421 first contacts the sliding groove 143 upward. At this time, the inclined limiting plate 421 makes the leftmost side enter the sliding groove 143 first. As the limiting plate 421 moves upward, the right side of the limiting plate 421 can be squeezed toward the deformation groove 422 to the left, so that the limiting plate 421 can be smoothly forced to cross the sliding groove 143 and reach the top of the baffle 144, so that the limiting section 42 can be stably located above the baffle 144, and the limiting plate 421 cannot cross the sliding groove 143 downward without the action of external force, so that the nut body 1 and the flat washer 2 can always be connected together.

[0034] Among them, the left side of the mating ring 14 abuts against the insertion section 41, and the right side of the mating ring 14 abuts against the second limiting member 2121. Since the second limiting member 2121 abuts against the right side of the mating ring 14, and the left side of the mating ring 14 abuts against the insertion section 41 of the first limiting member 4, the abutment of the mating ring 14 can guide the sliding direction during the up and down sliding of the first limiting member 4 and the second limiting member 2121.

[0035] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Locking nut, comprising a nut body, the axial direction of the nut body extending vertically, and a threaded hole provided on the nut body, characterized in that: It further includes a flat washer located below the nut body and a spring compressively arranged between the nut body and the flat washer. The upper part of the spring is fixedly connected to the nut body, and the lower part of the spring is fixedly connected to the flat washer. The flat washer is provided with a first limiting member slidably mounted on the nut body facing upward, and the nut body is provided with a limiting insertion block on the rotation track of the first limiting member.

2. The locknut according to claim 1, wherein: The flat washer includes a positioning section extending upward in the length direction. The nut body is provided with a mounting groove for the positioning section to be inserted. The spring is located on the positioning section and the circumference of the positioning section abuts against the nut body.

3. The locknut according to claim 2, characterized in that: The positioning section includes an inner ring and an outer ring. The outer circumference of the inner ring abuts against the inner wall of the spring, and the inner wall of the outer ring abuts against the circumference of the spring.

4. The locknut according to claim 3, characterized in that: The nut body is provided with a mating ring above the positioning section. A mating groove is arranged in the mating ring. The top of the spring is located in the mating groove and fixedly connected to the mating ring.

5. The locknut according to claim 4, wherein: The first limiting member is located on the inner ring and is made of a material prone to deformation. A second limiting member with the same shape and size as the first limiting member is arranged on the outer ring. The first limiting member includes an insertion section and a limiting section located above the insertion section. The mating ring is provided with an insertion groove for the insertion section to be inserted and a sliding groove for the limiting section to slide up and down. The mating ring further includes a baffle plate at the bottom of the sliding groove. The upper end surface of the baffle plate abuts against the bottom of the limiting section.

6. The locknut according to claim 5, wherein: The limiting section includes a limiting plate. The limiting plate is inclined from left to right from top to bottom. A deformation groove is arranged in the limiting section along the front-back direction.

7. The locknut according to claim 4, characterized in that: The left side of the mating ring abuts against the insertion section, and the right side of the mating ring abuts against the second limiting member.

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