Sleeve structure for retaining nut

Abstract

The embodiment of the utility model provides a sleeve structure for retaining a nut, a corresponding external nut 1 is in a cylindrical shape with an annular sinking groove on the outer surface, the sleeve structure for retaining the nut comprises a sleeve, the outer wall of the retaining end of the sleeve is provided with a groove, and the groove is provided with a through hole along the radial direction; the step bead is arranged in the through hole in a penetrating mode, the abutting end of the step bead is in a spherical crown shape, and the top height of the spherical crown is within the height range of the sinking groove; and the holding end rubber ring covers the pressing end of the step bead and is sleeved in the groove in a matched manner. The nut in the sleeve is fixedly held by the step bead, a target can be stably fixedly held by matching with fixation and elasticity of the rubber ring, the step bead is embedded in the through hole of the groove, the rubber ring is embedded in the groove, disassembly and replacement are easy, the structure can adapt to nuts of various different sizes according to the fact that the through holes are formed in the groove of the sleeve, and the structure is simple and convenient. The target nut is fixed through the sleeve, the step bead and the rubber ring, the structure is simple, and the manufacturing difficulty and cost are reduced.

Description

Technical Field

[0001] This utility model applies to the field of mechanical fixing, and in particular relates to a sleeve structure for fixing nuts. Background Technology

[0002] In the context of traditional mechanical automation, nuts typically require specialized tools or devices for installation and removal. However, these traditional methods can be complex in manufacturing processes, increasing production costs and making them unsuitable for cost-sensitive applications.

[0003] Existing solutions on the market often fail to balance the demands for low cost and high performance, especially in applications requiring rapid installation, frequent disassembly, and cost sensitivity. There is an urgent need for a sleeve structure that can remain stable under a wider range of conditions while also offering low cost and a simple structure. Therefore, developing a sleeve structure that is simple in structure, easy to replace, and low in cost is essential. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a sleeve structure for holding nuts, so as to solve the technical problem of cumbersome structure and high cost.

[0005] To solve the above-mentioned technical problems, this utility model proposes a sleeve structure for holding nuts. The corresponding outer nut is a cylindrical shape with an annular groove on its outer surface. The sleeve structure for holding nuts includes: a sleeve with a groove on the outer wall of its holding end, and a through hole in the groove along the radial direction; a stepped bead, which is inserted into the through hole, and its top end is spherical, with the height of the top of the spherical bead within the height range of the groove; and a retaining end rubber ring, which covers the pressing end of the stepped bead and is fitted into the groove.

[0006] Furthermore, the pressing end of the stepped bead is a regular square prism or a regular hexagonal prism that matches the groove.

[0007] Furthermore, the height of the base of the regular square prism or regular hexagonal prism is within the range of the groove depth.

[0008] Furthermore, the sleeve is made of chrome vanadium steel or carbon steel.

[0009] Furthermore, the rubber ring is made of polyurethane rubber.

[0010] Furthermore, a receiving cavity is provided at the end of the stepped bead, and a spherical bead is nested inside the receiving cavity.

[0011] Furthermore, the cavity is coated with lubricating oil.

[0012] Furthermore, the cavity is provided with an elastic element that pushes the ball outward.

[0013] Furthermore, the outer surface of the connecting end of the sleeve is threaded.

[0014] This utility model embodiment proposes a sleeve structure for securing nuts. The stepped beads abut against the toothed structure of the outer nut, and the elasticity of the rubber ring abuts against the groove, thus achieving a fastening effect. Only a groove and a through hole need to be opened at one end of the sleeve. The structure is simple, easy to manufacture and reduces costs. Moreover, the fixing method of the stepped beads and the rubber ring is simple and easy to disassemble and install. Attached Figure Description

[0015] Figure 1 This is an exploded structural diagram of an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the exploded structure from another angle of an embodiment of this utility model.

[0017] Figure 3 This is a partial structural schematic diagram of the sleeve according to an embodiment of the present utility model.

[0018] Figure 4 This is a schematic diagram of the overall structure of an embodiment of this utility model.

[0019] Figure 5 This is a schematic diagram of the overall structure from another angle of an embodiment of the present utility model.

[0020] Figure 6 This is a partial structural schematic diagram of the stepped bead of this utility model embodiment.

[0021] Figure 7 This is a partial schematic diagram of the stepped bead from another angle in an embodiment of this utility model.

[0022] Explanation of icon numbers

[0023] External nut 1 sleeve 2 through hole 21 stepped bead 3

[0024] Rubber ring 4 Detailed Implementation

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Please refer to Figures 1 to 7This embodiment relates to a sleeve structure for holding a nut. The corresponding outer nut 1 is a cylindrical shape with an annular groove on its outer surface. The sleeve structure for holding a nut includes a sleeve 2, with a groove on the outer wall of its holding end. A through hole 21 is formed radially on the groove. A stepped bead 3 is inserted into the through hole 21. Its top end is shaped like a spherical crown. The height of the top of the spherical crown is within the height range of the groove. A rubber ring 4 at the holding end covers the pressing end of the stepped bead 3 and is fitted into the groove.

[0027] In a preferred embodiment, a cylindrical external nut 1 with an annular groove on its outer surface is used for holding and outputting. The external nut 1 is a blind hole nut with one end closed and the other end open. The circumferential surfaces at both ends of the external nut 1 have a toothed structure. Under normal conditions, the closed end enters first and is held in the sleeve 2. When the transmission device such as the cylinder of the next process is started, it presses against the closed end of the external nut 1 and pushes it out of the sleeve 2.

[0028] In a preferred embodiment, the sleeve 2 has a retaining end at the end where the outer nut 1 is fitted, used to retain the outer nut 1 and other cylindrical hardware parts, and a connecting end away from the outer nut 1, used to connect and fix equipment. The middle position of the sleeve 2 is hexagonal to prevent rolling and facilitate handling. The sleeve 2 has a groove along the outer circumference of the retaining end, and two symmetrical through holes 21 are formed in the groove. Stepped beads 3 are fitted into the through holes 21, and the number of stepped beads 3 corresponds to the number of through holes 21, forming a clamping state for the outer nut 1, so as to retain the nut.

[0029] In a preferred embodiment, the abutting end of the stepped bead 3 is spherical and extends into the interior of the sleeve 2 through the through hole 21. The abutting end of the stepped bead 3 is located in the groove of the sleeve 2 and abuts against the through hole 21. The abutting end is a regular square prism or a hexagonal prism and is lower than the depth of the groove of the retaining end of the sleeve 2, so that the range of vertical movement of the stepped bead 3 during each retention process will not be separated from the groove. That is, the maximum vertical movement height of the stepped bead 3 will not be higher than the depth of the groove, thereby ensuring that it will not get stuck due to separation from the groove. The parallel facets are embedded in the groove of the retaining end of the sleeve 2, so that the facets of the abutting end of the stepped bead 3 engage with the side wall of the groove, thereby preventing the stepped bead 3 from rotating during the vertical movement of the retaining hardware and ensuring the stability of the retention.

[0030] In a preferred embodiment, the rubber ring 4 is fitted into the annular groove of the sleeve 2. The width of the groove matches the width of the rubber ring 4, allowing the rubber ring 4 to fit snugly into the groove, covering the through hole 21 on the groove and the pressing end of the stepped bead 3. The elasticity of the rubber ring 4 causes the position at the pressing end to deform, thereby tightly embedding it into the groove. This prevents the rubber ring 4 from moving due to frequent compression by the stepped bead 3 and external factors. On the other hand, the height of the rubber ring 4 is higher than the depth of the groove. When it is lifted by the stepped bead, the bottom of the rubber ring 4 will not be higher than the groove, preventing the rubber ring 4 from falling out of the groove. The protruding part is also convenient for disassembly and replacement.

[0031] In a preferred embodiment, the sleeve 2 is made of chromium vanadium steel, which has good hardness and wear resistance, and can maintain the precision of the fixed structure for a long time, ensuring the stability of the connector; the sleeve 2 is made of carbon steel, which has a lower cost, and can achieve better strength and toughness through heat treatment.

[0032] In a preferred embodiment, the rubber ring 4 is made of polyurethane rubber, which has good elasticity and wear resistance, ensuring good retraction force during long-term use, thereby firmly fixing the external nut 1. Furthermore, polyurethane rubber is oil-resistant, aging-resistant, and weather-resistant, ensuring the stability and durability of the rubber ring 4 under various working conditions.

[0033] In a preferred embodiment, the crown-shaped abutment bead of the stepped bead 3 is made of tungsten carbide. Tungsten carbide has excellent hardness and wear resistance, and its good corrosion resistance can also extend the service life of the bead.

[0034] In another preferred embodiment, to enhance the holding effect of the stepped beads 3, multiple through holes 21 are provided in the groove of the sleeve 2. Three, four, or more through holes 21 are evenly distributed at equal angles along the cross-section of the sleeve 2. Simultaneously, the stepped beads 3 are distributed in the same number at the same positions to increase the contact area with the rubber ring 4 and enhance the holding force. Furthermore, when three or more through holes 21 are provided in the groove at the holding end of the sleeve 2, the number of stepped beads 3 can be adjusted according to the size and weight of other cylindrical hardware parts besides the external nut 1, flexibly adjusting the holding structure to achieve the best holding effect. Since the stepped beads 3 need to be fixed by the rubber ring 4 to ensure a certain range of motion, disassembly and installation are simpler and more convenient. In this structure, the diameter of each through hole 21 matches the diameter of the stepped bead 3, ensuring that the stepped beads 3 have sufficient contact area and stability when holding the external nut 1. By optimizing the number of through holes 21 and stepped beads 3, as well as the matching of the rubber ring 4, the holding structure can maintain its functionality and reliability under different loads.

[0035] In another preferred embodiment, the top end of the stepped bead 3 has a receiving cavity, in which a rolling ball is nested. This ball can better hold the outer nut 1, providing rolling friction to the outer nut 1 through its rolling motion, thus achieving the holding of the outer nut 1 without excessive force. The ball fills the receiving cavity and contacts and rubs against the inner wall of the cavity. To make the ball roll more smoothly, lubricating oil is applied to the receiving cavity, thereby preventing wear of the ball after long-term use, which would make the ball difficult to roll and reduce the holding effect. Therefore, using lubricating oil can not only reduce the heat accumulation caused by friction and the material degradation caused by long-term high temperature, but also effectively improve the service life of the ball.

[0036] In another preferred embodiment, the accommodating cavity is further provided with an elastic element, preferably a spring. The spring is connected between the ball and the bottom of the accommodating cavity, which plays a buffering role and reduces the vibration and noise of the ball during rolling. When the ball pops out, it is subjected to the pressure of the external nut 1. The ball squeezes the spring and compresses it towards the bottom of the accommodating cavity. After passing through the toothed structure at both ends of the external nut 1, the spring will drive the ball to quickly recover, thereby resisting the groove of the external nut 1. This design can reduce the pressure between the stepped ball 3 and the rubber ring 4, ensuring that the overall stability of the structure and the convenience of operation can be maintained even during frequent holding and loosening.

[0037] The specific workflow is as follows: When the closed end of the outer nut 1 enters the sleeve 2 first, the length of the stepped bead 3 is always sufficient to press against the groove of the outer nut 1. The top of the stepped bead 3 first contacts the toothed structure of the outer nut 1. A certain degree of collision and compression occurs, causing the entire stepped bead 3 to rise. The pressing end of the stepped bead 3 presses against the rubber ring 4, and the top of the bead 3 slides and rubs on the toothed structure. Since the top of the stepped bead 3 is spherical, it slides past the center point, and the pressing end gradually slides into the groove. Due to the elasticity of the rubber ring 4, the stepped bead 3 rebounds, quickly pressing against the outer nut 1, thus achieving a stable holding effect. The connecting end of the sleeve 2 is connected to a cylinder. The cylinder's ejector pin can press against the closed end of the outer nut 1, pushing the outer nut 1 out and detaching it from the sleeve 2 to proceed to the next step. When it is necessary to hold other hardware parts, the multi-hole 21 of the sleeve 2 groove is used to set the corresponding stepped bead 3. The stepped bead 3 is equipped with a spring in the receiving cavity of the ball bead, thereby realizing the fastening of hardware parts of different diameters and sizes, enhancing its applicability and functionality.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sleeve structure for securing a nut, wherein the corresponding outer nut (1) is a cylindrical shape with an annular countersunk groove on its outer surface, characterized in that, The sleeve structure for retaining nuts includes: The sleeve (2) has a groove on the outer wall of its holding end, and a through hole (21) is provided on the groove along the radial direction; Stepped beads (3) are inserted into through holes (21), and their top ends are spherical. The height of the top of the spherical crown is within the height range of the sink groove. The retaining end rubber ring (4) covers the pressing end of the stepped bead (3) and is fitted into the groove in a matching manner.

2. The sleeve structure for securing the nut as described in claim 1, characterized in that, The pressing end of the stepped bead (3) is a regular square prism or a regular hexagonal prism that matches the groove.

3. The sleeve structure for securing the nut as described in claim 2, characterized in that, The height of the base of a regular square prism or regular hexagonal prism is within the depth range of the groove.

4. The sleeve structure for securing the nut as described in claim 1, characterized in that, The sleeve (2) is made of chrome vanadium steel or carbon steel.

5. The sleeve structure for securing the nut as described in claim 1, characterized in that, The rubber ring (4) is made of polyurethane rubber.

6. The sleeve structure for retaining nuts as described in claim 1, characterized in that, The end of the stepped bead (3) is provided with a receiving cavity, and a ball bead is nested in the receiving cavity.

7. The sleeve structure for securing the nut as described in claim 6, characterized in that, The cavity is coated with lubricating oil.

8. The sleeve structure for retaining nuts as described in claim 6, characterized in that, The cavity is equipped with an elastic element that pushes the ball outward.

9. The sleeve structure for retaining nuts as described in any one of claims 1 to 8, characterized in that, The outer surface of the connecting end of the sleeve (2) is threaded.

Images