A nut tightening structure

Abstract

The utility model discloses a kind of tighten nut structure, include positioning nut, positioning nut is hollow, guiding pin is installed in the top end inside positioning nut, guiding groove is opened in the top of guiding pin, the top of positioning nut is equipped with limit block, limit block is symmetrically provided with two, limit slot is symmetrically provided with two, and limit block, limit slot, guiding groove are on the same horizontal line;Guiding pin is used for positioning and supporting and hold lock nut, when hold lock screw is tightened downwards, it will press guiding pin and move downwards;Positioning screw, positioning screw is connected in guiding pin after being inserted from the bottom of positioning nut, spring is arranged in the inside of positioning nut and is sleeved on the periphery of screw, guiding pin has part and projects out of positioning nut under the action of spring, the both ends of spring respectively rest at guiding pin, at the inside bottom of positioning nut, positioning screw is round head screw;Hold lock nut, the limit slot of matching limit block is equipped in the bottom of hold lock nut, hold lock nut is hollow;Hold lock screw, detachably connected to the top of hold lock nut.

Description

Technical Field

[0001] This utility model relates to the field of tightening nuts, and specifically to a tightening nut structure. Background Technology

[0002] Most existing bicycle crankset wrenches are made of sheet metal bending with two protrusions on the head for installation and removal. However, they are only suitable for manual operation and not for assembly line work. In the past, when assembling products, employees operated purely by hand, using a hex wrench and a crankset wrench to tighten the locking screws. It took an average of three to four minutes to assemble one set. Moreover, the screws tightened by hand were sometimes loose and sometimes tight, requiring an additional tightening process. The work efficiency was very low. Therefore, there is a need for a tightening nut that can be tightened quickly. Utility Model Content

[0003] The technical problem this utility model aims to solve is that most existing bicycle chainring wrenches are made of sheet metal bending with two protrusions on the head for installation and disassembly. However, they are only suitable for manual operation and not for assembly line work. In the past, when assembling products, employees operated purely manually, using a hex wrench and a chainring wrench to tighten the locking screws, which took an average of three to four minutes to assemble one set. Moreover, the screws tightened manually were sometimes loose and sometimes tight, requiring an additional tightening step, which resulted in very low work efficiency. This utility model provides a tightening nut structure, which uses a base composed of a positioning nut and a positioning screw, and a locking nut and locking screw to install the chainring or pulley. This allows for quick installation of the chainring or pulley without the need for a tightening step, greatly reducing installation time. With skilled operators, the time can be reduced to less than one minute. The structure is simple and easy to use, thus solving the defects caused by the existing technology.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A tightening nut structure includes a positioning nut, wherein a guide pin is installed at the top of the positioning nut, and a limiting block is provided at the top of the positioning nut; A positioning screw is inserted from the bottom of the positioning nut and connected to the guide pin. The positioning nut has a spring inside that is sleeved around the screw. Under the action of the spring, the guide pin protrudes partially from the positioning nut. The positioning screw can hold the guide pin to prevent it from falling off. A locking nut, wherein the bottom of the locking nut is provided with a limiting groove that matches the limiting block; The locking screw is detachably attached to the top of the locking nut.

[0005] In the aforementioned tightening nut structure, a guide groove is provided on the top of the guide pin to facilitate guiding and limiting.

[0006] In the above-mentioned tightening nut structure, two limiting blocks and two limiting grooves are symmetrically arranged, and the limiting blocks, the limiting grooves, and the guide grooves are on the same horizontal line, which facilitates matching and installation.

[0007] In the aforementioned tightening nut structure, the two ends of the spring respectively abut against the guide pin and the bottom of the positioning nut, so that the guide pin can return to its original position after being subjected to pressure.

[0008] In the above-described tightening nut structure, the positioning screw is a round-head screw.

[0009] In the aforementioned tightening nut structure, the inner wall of the locking nut is provided with an internal thread, the locking screw is provided with an external thread that matches the internal thread, and the operating end of the locking screw is a hexagonal slot hole.

[0010] The guide pin is used to position and support the locking nut. When the locking screw is tightened downwards, it will press the guide pin downwards.

[0011] The two limiting blocks lock the locking nut in the limiting groove, preventing it from rotating. When the bit leaves the locking screw, the guide pin will lift the combination of the locking screw and the locking nut under the action of the spring, making it easy to remove.

[0012] In the above-described tightening nut structure, the positioning nut is hollow, and the locking nut is hollow.

[0013] When installing a geared disc or pulley using the above-described tightening nut structure, first fix the assembled positioning nut and positioning screw, place the locking nut at the guide pin, and fit the locking screw onto the bit of a screwdriver or electric screwdriver. After assembling the geared disc or pulley, install the locking screw on the locking nut. When the locking screw is tightened downwards, it will press the guide pin downwards. After the installation of the locking screw and locking nut is completed, the guide pin will return to its initial state under the action of the spring, thus completing the installation of the geared disc or pulley. Generally, geared discs or pulley products require 5 tightening nut structures.

[0014] Installation can be done using an electric screwdriver, with the torque set in advance. Tightening the locking screws can be done in one step, eliminating the need for a separate tightening process and further improving efficiency. The tightening force is consistent, which improves product quality. When used with a cantilever bracket and an electric screwdriver, assembly line operation can be achieved, greatly improving production efficiency.

[0015] The technical solution provided by the present invention, based on the above-described tightening nut structure, has the following technical effects: The base, consisting of a positioning nut and a positioning screw, and the locking nut and locking screw work together to install the gear plate or pulley. This allows for quick installation of the gear plate or pulley without the need for a locking process, greatly reducing installation time. With the help of a skilled operator, the installation time can be reduced to less than one minute. The structure is simple and easy to use. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a tightening nut structure according to the present invention; Figure 2 This is a schematic diagram of the positioning nut installation in the use state of a tightening nut structure according to this utility model; Figure 3 This is a schematic diagram of the installation state of the tightening nut structure of this utility model.

[0017] The accompanying figure is labeled as follows: Positioning nut 100, positioning screw 200, locking nut 300, locking screw 400, guide pin 101, limit block 102, spring 103, guide groove 104. Detailed Implementation

[0018] In order to make the technical means, inventive features, objectives and effects of the utility model easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to specific illustrations. Obviously, the described embodiments are some embodiments of the utility model, but not all embodiments.

[0019] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0021] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0022] A preferred embodiment of this utility model provides a tightening nut structure. The purpose is to install a geared disc or pulley by using a base composed of a positioning nut and a positioning screw, and the cooperation of a locking nut and a locking screw. This allows for quick installation of the geared disc or pulley without the need for a tightening process, greatly reducing installation time. With the operation of a skilled operator, the time can be shortened to less than one minute. The structure is simple and easy to use.

[0023] like Figure 1 As shown, a tightening nut structure includes a positioning nut 100, which is hollow. A guide pin 101 is installed at the top of the positioning nut 100. A guide groove 104 is opened at the top of the guide pin 101. A limiting block 102 is provided at the top of the positioning nut 100. Two limiting blocks 102 are symmetrically arranged, and two limiting grooves are symmetrically arranged. The limiting blocks 102, limiting grooves, and guide grooves 104 are on the same horizontal line. The guide pin 101 is used to position and support the locking nut 300. When the locking screw 400 is tightened downwards, it will press the guide pin 101 downwards.

[0024] The positioning screw 200 is inserted from the bottom of the positioning nut 100 and connected to the guide pin 101. The positioning nut 100 has a spring 103 sleeved around the screw. Under the action of the spring 103, part of the guide pin 101 protrudes out of the positioning nut 100. The two ends of the spring 103 abut against the guide pin 101 and the bottom of the positioning nut 100, respectively. The positioning screw 200 is a round head screw. The locking nut 300 has a limiting groove at its bottom for matching limiting block 102, and the locking nut 300 is hollow. The locking screw 400 is detachably connected to the top of the locking nut 300; The inner wall of the locking nut 300 is provided with internal threads, and the locking screw 400 is provided with external threads that match the internal threads. The operating end of the locking screw 400 is a hexagonal slot hole.

[0025] Two limiting blocks 102 engage the limiting groove of the locking nut 300, preventing it from rotating. When the bit leaves the locking screw 400, the guide pin 101, under the action of the spring 103, lifts the assembly of the locking screw 400 and the locking nut 300, making it easy to remove.

[0026] like Figure 2-3As shown, when installing a geared disc or pulley using the above-mentioned tightening nut structure, first fix the assembled positioning nut 100 and positioning screw 200, place the locking nut 300 at the guide pin 101, and put the locking screw 400 on the screwdriver or electric screwdriver bit. After assembling the geared disc or pulley, install the locking screw 400 on the locking nut 300. When the locking screw 400 is tightened downwards, it will press the guide pin 101 downwards. After the installation of the locking screw 400 and the locking nut 300 is completed, the guide pin 101 will return to its initial state under the action of the spring 103, thus completing the installation of the geared disc or pulley. Generally, geared disc or pulley products require 5 tightening nut structures.

[0027] In summary, this utility model provides a tightening nut structure that uses a base composed of a positioning nut and a positioning screw, along with a locking nut and locking screw, to install a geared disc or pulley. This allows for quick installation of the geared disc or pulley without the need for a locking process, significantly reducing installation time. With skilled operators, the installation time can be reduced to less than one minute. The structure is simple and easy to use. The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail should be understood as being implemented in a manner common to those skilled in the art. Those skilled in the art can make various modifications or variations within the scope of the claims, including simple deductions, modifications, or substitutions, which do not affect the substantive content of this utility model.

Claims

1. A nut tightening structure, characterized in that, It includes a positioning nut, wherein a guide pin is installed at the top of the inside of the positioning nut, and a limiting block is provided at the top of the positioning nut; A positioning screw is inserted from the bottom of the positioning nut and connected to the guide pin. The positioning nut has a spring sleeved around the screw inside, and the guide pin protrudes partially from the positioning nut under the action of the spring. A locking nut, wherein the bottom of the locking nut is provided with a limiting groove that matches the limiting block; The locking screw is detachably attached to the top of the locking nut.

2. The tightening nut structure according to claim 1, characterized in that, The top of the guide pin is provided with a guide groove.

3. The tightening nut structure according to claim 2, characterized in that, Two limiting blocks and two limiting grooves are symmetrically arranged, and the limiting blocks, limiting grooves, and guide grooves are on the same horizontal line.

4. The tightening nut structure according to claim 1, characterized in that, The two ends of the spring abut against the guide pin and the bottom of the positioning nut, respectively.

5. The tightening nut structure according to claim 1, characterized in that, The positioning screw is a round-head screw.

6. The tightening nut structure according to claim 1, characterized in that, The inner wall of the locking nut is provided with an internal thread, and the locking screw is provided with an external thread that matches the internal thread.

7. The tightening nut structure according to claim 1, characterized in that, The positioning nut is hollow, and the locking nut is hollow.

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