Knurled thread insert with internal and external teeth

Abstract

The utility model discloses a knurled thread insert with internal and external teeth. The knurled thread insert comprises a countersunk head seat and a self-locking mechanism, a sleeve shell is arranged on the lower side of the countersunk head seat, threaded guide grooves are formed in the inner arc face and the outer arc face of the sleeve shell, evenly-distributed saw teeth are arranged at the upper end of the outer side of the countersunk head seat, a groove is formed in the upper side of the countersunk head seat, a locking seat is slidably connected into the groove, and a rubber ring is arranged on the upper side of the locking seat; the self-locking mechanism is arranged between the groove and the locking seat, and the knurled internal and external thread barrel adopts an inner hole counter bore step design and is combined with the machining precision of high-precision automatic lathe equipment, so that a high-precision inner hole can still be ensured when a product is mounted into a threaded hole of a machine body, and the situation that the product has a high-precision requirement is met; and meanwhile, thread loosening locking protection can be conducted on the threaded connection portion of the workpiece and the threaded sleeve through the elastic element, and the internal thread connection self-locking performance of the device is further improved.

Description

Technical Field

[0001] This utility model relates to the field of threaded sleeve technology, specifically a knurled internal and external threaded sleeve. Background Technology

[0002] Knurled internal and external thread inserts can improve the versatility and maintainability of parts. Some knurled internal and external thread inserts have clustered serrated teeth on both the inner and outer sides of the upper end of the insert. In use, when the knurled internal and external thread insert is rotated and pressed into the threaded hole of the base body through an external component, the serrated tooth profile is firmly embedded in the base body, forming a new internal thread with high strength and high precision. Subsequently, the workpiece is installed into the internal thread of the knurled internal and external thread insert using the same principle. However, due to the limitations of the threaded connection, there is a gap between the device and the bottom hole of the machine body. Therefore, the newly formed internal threaded hole will have a vertical tilt, which cannot meet the requirements of products that need precise positioning of the threaded hole. At the same time, there is room for improvement in the self-locking performance of the threaded connection between the workpiece and the device. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a knurled internal and external threaded sleeve. The device adopts an internal counterbore step design combined with the machining accuracy of a high-precision Swiss-type lathe, which can ensure the high precision of the internal hole when the product is installed into the threaded hole of the machine body, and meets the needs of products with high precision requirements. At the same time, the device can lock and protect the threaded connection between the workpiece and the threaded sleeve through an elastic element, further improving the self-locking performance of the internal thread connection of the device, and can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a knurled internal and external threaded sleeve, comprising a countersunk head and a self-locking mechanism;

[0005] Countersunk head seat: It has a sleeve on its lower side, and threaded guide grooves are opened on both the inner and outer arc surfaces of the sleeve. The upper outer side of the countersunk head seat has evenly distributed serrated teeth. The upper side of the countersunk head seat has a groove, and a locking seat is slidably connected inside the groove. A rubber ring is provided on the upper side of the locking seat.

[0006] Self-locking mechanism: It is set between the groove and the locking seat. The device adopts an internal countersunk step design combined with the machining accuracy of high-precision Swiss-type lathe equipment to ensure that the high-precision internal hole can still be guaranteed when the product is installed into the threaded hole of the machine body. It meets the needs of products with high precision requirements. At the same time, the device can lock and protect the threaded connection between the workpiece and the threaded sleeve through the elastic element, further improving the self-locking performance of the internal thread connection of the device.

[0007] Furthermore, the self-locking mechanism includes a fixed seat, an arc-shaped telescopic rod, a tightening seat, and a pressure-applying seat. The fixed seats are evenly arranged at the bottom of the groove, and the lower side of the locking seat is provided with evenly distributed pressure-applying seats. The side of the fixed seat near the adjacent pressure-applying seat is provided with a tightening seat through the arc-shaped telescopic rod. The tightening seats are all installed in cooperation with the adjacent pressure-applying seats. The center of the arc of the telescopic end and the fixed end of the arc-shaped telescopic rod coincides with the center of the countersunk seat. Through the elastic element, the threaded connection between the workpiece and the threaded sleeve can be locked and protected against thread loosening, further improving the self-locking performance of the internal thread connection of the device.

[0008] Furthermore, the self-locking mechanism also includes a spring, which is disposed between the tightening seat and the adjacent fixed seat. The spring is movably sleeved with the outer end of the adjacent arc-shaped telescopic rod. The compression force of the spring indirectly causes the locking seat to apply a positive rotational force to the contacting workpiece, thereby preventing the threaded connection between the workpiece and the threaded sleeve from becoming loose.

[0009] Furthermore, the bottom of the groove is provided with evenly distributed area limiting rods, and the pressure seats are all installed in cooperation with the adjacent area limiting rods to limit the movement range of the pressure seats.

[0010] Furthermore, the interior of the groove is provided with evenly distributed contact seats through telescopic columns and springs. Springs are all movably sleeved with the outer ends of adjacent telescopic columns. The upper side of each contact seat is in contact with the lower side of the locking seat. The spring force itself makes the locking seat initially located at an appropriate distance above the groove, which facilitates subsequent elastic self-locking.

[0011] Furthermore, a rubber sealing ring is provided on the lower side of the countersunk head to seal and protect the threaded connection between the threaded sleeve and the base.

[0012] Furthermore, both the countersunk head and the sleeve are provided with a galvanized layer to protect the threaded sleeve from corrosion.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This knurled internal and external threaded sleeve has the following advantages:

[0014] 1. When manufacturing knurled internal and external threaded inserts, high-precision five-axis lathes are used to ensure machining accuracy. The machining accuracy of the equipment is not less than 0.01mm. During the machining process of knurled internal and external threaded inserts, the concentricity of the product is controlled within 0.01mm. When the workpiece is threaded and installed inside the insert, the workpiece is guided by the countersunk hole in the countersunk seat, so that it can quickly and accurately position itself with the internal thread inside the insert. This knurled internal and external threaded insert adopts an internal countersunk step design combined with the machining accuracy of a high-precision Swiss-type lathe to ensure a high-precision internal hole when the product is installed into the machine body threaded hole, which meets the needs of products with high precision requirements.

[0015] 2. The workpiece rotates forward and enters the internal thread hole of the knurled internal and external threaded sleeve. When the workpiece rotates forward and moves down until its lower outer edge contacts the locking seat, as the workpiece continues to rotate and move deeper into the sleeve, the lower outer edge of the workpiece drives the locking seat to rotate and move deeper into the groove through contact friction. The contact seat is compressed, and the telescopic end of the telescopic column and the second spring elastically contract. During the downward movement of the pressure seat, its lower end inclined face applies pressure to the top tight seat, and the telescopic end of the arc-shaped telescopic rod and the first spring contract. The contact friction between the workpiece and the locking seat is increased through the rubber ring. After the workpiece is connected to the internal thread of the sleeve, the compression force of the first spring indirectly causes the locking seat to apply a positive rotational force to the contacting workpiece, preventing the threaded connection between the workpiece and the sleeve from loosening. This knurled internal and external threaded sleeve can lock and protect the threaded connection between the workpiece and the sleeve through the elastic element, further improving the self-locking performance of the internal thread connection of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0018] Figure 3 This is a top view of the structure of this utility model;

[0019] Figure 4 This is an enlarged structural diagram of point A in this utility model.

[0020] In the diagram: 1 Countersunk seat, 2 Housing, 3 Serrated tooth, 4 Locking seat, 5 Rubber ring, 6 Self-locking mechanism, 61 Fixed seat, 62 Arc-shaped telescopic rod, 63 Spring 1, 64 Tightening seat, 65 Pressure seat, 7 Area limiting rod, 8 Telescopic column, 9 Spring 2, 10 Contact seat, 11 Sealing rubber ring. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-4 This embodiment provides a technical solution: a knurled internal and external threaded sleeve, including a countersunk seat 1 and a self-locking mechanism 6;

[0023] Countersunk head 1: A sleeve 2 is provided on its lower side. Threaded guide grooves are provided on both the inner and outer arc surfaces of the sleeve 2. Evenly distributed serrated teeth 3 are provided on the upper outer side of the countersunk head 1. A groove is provided on the upper side of the countersunk head 1, and a locking seat 4 is slidably connected inside the groove. A rubber ring 5 is provided on the upper side of the locking seat 4. A rubber sealing ring 11 is provided on the lower side of the countersunk head 1. Both the countersunk head 1 and the sleeve 2 have a galvanized layer. During the preparation of the knurled internal and external threaded inserts, a high-precision five-axis lathe is used to ensure its machining accuracy. The machining accuracy of the equipment is not less than 0.01mm. During the processing of the knurled internal and external threaded inserts, the concentricity of the product is controlled within 0.01mm. When using the knurled internal and external threaded inserts, the insert is first press-fitted into the corresponding base thread through the external thread of the sleeve 1. Inside the hole, the threaded connection between the threaded sleeve and the base is sealed and protected by the sealing rubber ring 11. As the serrated tooth 3 is embedded in the threaded hole of the base, a new high-precision internal thread is formed. When the workpiece is installed by threaded connection inside the threaded sleeve, the workpiece is guided by the countersunk hole opened in the countersunk seat 1, so that it can be quickly and accurately threaded with the internal thread inside the threaded sleeve. Knurling can be provided on the outside of the countersunk seat 1 to improve the anti-slip property of the outside of the countersunk seat 1. The galvanized layer improves the corrosion resistance of the device itself. This knurled internal and external threaded sleeve adopts the inner hole countersunk step design combined with the processing accuracy of the high-precision Swiss machine equipment to ensure that the high-precision inner hole can still be guaranteed when the product is installed into the threaded hole of the machine body, which meets the needs of products with high precision requirements.

[0024] Self-locking mechanism 6: It is disposed between the groove and the locking seat 4. The self-locking mechanism 6 includes a fixed seat 61, an arc-shaped telescopic rod 62, a tightening seat 64, and a pressure seat 65. The fixed seats 61 are evenly distributed at the bottom of the groove. The lower side of the locking seat 4 is provided with evenly distributed pressure seats 65. The side of the fixed seat 61 closest to the adjacent pressure seat 65 is provided with a tightening seat 64 through the arc-shaped telescopic rod 62. The tightening seats 64 are all installed in cooperation with the adjacent pressure seats 65. The center of the arc of the telescopic end and the fixed end of the arc-shaped telescopic rod 62 coincides with the center of the countersunk head 1. Self-locking mechanism 6 It also includes spring 63, which is disposed between the clamping seat 64 and the adjacent fixed seat 61. Spring 63 is movably sleeved with the outer end of the adjacent arc-shaped telescopic rod 62. The bottom of the groove is provided with evenly distributed area limiting rods 7. The pressure seats 65 are all installed in cooperation with the adjacent area limiting rods 7. The inside of the groove is provided with evenly distributed contact seats 10 through the telescopic column 8 and spring 9. Spring 9 is movably sleeved with the outer end of the adjacent telescopic column 8. The upper side of the contact seat 10 contacts the lower side of the locking seat 4. As the workpiece rotates forward, it is connected by threads. The connection extends into the internal threaded hole of the threaded sleeve. When the workpiece rotates and moves downward until its lower outer edge contacts the locking seat 4, as the workpiece continues to rotate and move downward into the threaded sleeve, the lower outer edge of the workpiece, through contact friction, drives the locking seat 4 to rotate and simultaneously penetrate into the groove. The contact seat 10 is pressed, and the telescopic end of the telescopic column 8 and the second spring 9 elastically contract. During the downward movement of the pressure seat 65, its lower inclined surface applies pressure to the top tightening seat 64. The telescopic end of the arc-shaped telescopic rod 62 and the first spring 63 contract, increasing the contact friction between the workpiece and the locking seat 4 through the rubber ring 5. During this process, the contact seat 10 and the locking seat 4 slide adaptively. The movement range of the pressure seat 65 is limited by the two adjacent area limiting rods 7. When the workpiece is connected to the internal thread of the screw sleeve, the compression force of the spring 63 indirectly causes the locking seat 4 to apply a positive rotational force to the contacting workpiece, so as to avoid the loosening of the thread connection between the workpiece and the screw sleeve. The knurled internal and external threaded screw sleeve can lock and protect the threaded connection between the workpiece and the screw sleeve through the elastic element, further improving the self-locking performance of the internal thread connection of the device.

[0025] The working principle of the knurled internal and external threaded insert provided by this utility model is as follows: During the preparation of the knurled internal and external threaded insert, a high-precision five-axis lathe is used to ensure its machining accuracy. The machining accuracy of the equipment is not less than 0.01mm. During the machining process of the knurled internal and external threaded insert, the concentricity of the product is controlled within 0.01mm. When using the knurled internal and external threaded insert, the insert is first press-fitted into the corresponding threaded hole of the base body through the external thread of the insert housing 1. The threaded connection between the insert and the base body is sealed and protected by the sealing rubber ring 11. As the serrated teeth 3 are embedded into the threaded hole of the base body, a new high-precision internal thread is formed. When installing the workpiece threaded connection inside the insert, the workpiece is guided through the countersunk hole in the countersunk seat 1, thereby enabling rapid and precise thread positioning with the internal thread inside the insert. As the workpiece rotates forward, it penetrates into the internal threaded hole of the insert through the threaded connection. When the workpiece rotates downward... When the lower outer edge of the workpiece contacts the locking seat 4, as the workpiece continues to rotate and move downward into the threaded sleeve, the lower outer edge of the workpiece drives the locking seat 4 to rotate and move into the groove through contact friction. The contact seat 10 is pressed, the telescopic end of the telescopic column 8 and the second spring 9 elastically contract, and the lower end of the pressure seat 65 applies pressure to the top tightening seat 64 during the downward movement. The telescopic end of the arc-shaped telescopic rod 62 and the first spring 63 contract, and the contact friction between the workpiece and the locking seat 4 is increased by the rubber ring 5. During this process, the contact seat 10 and the locking seat 4 slide adaptively. The movement range of the pressure seat 65 is limited by the two adjacent area limit rods 7. When the workpiece is connected to the internal thread of the threaded sleeve, the compression force of the first spring 63 indirectly causes the locking seat 4 to apply a positive rotational force to the contacting workpiece, avoiding the loosening of the threaded connection between the workpiece and the threaded sleeve. The knurling on the outer side improves the anti-slip performance of the countersunk seat 1.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A knurled internal and external threaded sleeve, characterized in that: It comprises a countersunk seat (1) and a self-locking mechanism (6); The countersunk seat (1) has a sleeve (2) on its lower side, and the inner and outer arc surfaces of the sleeve (2) are provided with thread guide grooves. The upper end of the outer side of the countersunk seat (1) is provided with evenly distributed saw teeth (3). The upper side of the countersunk seat (1) is provided with a groove, and the interior of the groove is slidably connected to a locking seat (4). The upper side of the locking seat (4) is provided with a rubber ring (5); Self-locking mechanism (6): arranged between the groove and the locking seat (4).

2. A knurled internal and external threaded insert according to claim 1, characterized in that: The self-locking mechanism (6) comprises a fixed seat (61), an arc-shaped telescopic rod (62), a tightening seat (64) and a pressure seat (65); the fixed seat (61) is evenly arranged at the bottom of the groove; the lower side of the locking seat (4) is provided with evenly distributed pressure seats (65); the side of the fixed seat (61) close to the adjacent pressure seat (65) is provided with a tightening seat (64) through the arc-shaped telescopic rod (62); the tightening seat (64) is installed in cooperation with the adjacent pressure seat (65); the arc centers of the telescopic end and the fixed end of the arc-shaped telescopic rod (62) coincide with the center of the countersunk seat (1).

3. A knurled internal and external threaded insert according to claim 2, characterized in that: The self-locking mechanism (6) further comprises a spring 1 (63), wherein the spring 1 (63) is arranged between the tightening seat (64) and the adjacent fixing seat (61), and the spring 1 (63) is movably sleeved with the outer end of the adjacent arc-shaped telescopic rod (62).

4. The knurled internal and external threaded insert according to claim 2, characterized in that: The bottom of the groove is provided with evenly distributed regional limiting rods (7), and the pressure seats (65) are all installed in cooperation with adjacent regional limiting rods (7).

5. The knurled internal and external threaded insert according to claim 1, characterized in that: The interior of the groove is provided with evenly distributed contact seats (10) via telescopic columns (8) and spring 2 (9), the spring 2 (9) is movably sleeved with the outer end of the adjacent telescopic column (8), and the upper side of the contact seat (10) is in contact with the lower side of the locking seat (4).

6. The knurled internal and external threaded insert according to claim 1, characterized in that: A rubber sealing ring (11) is provided on the lower side of the countersunk seat (1).

7. The knurled internal and external threaded insert according to claim 1, characterized in that: The surfaces of the countersunk seat (1) and the casing (2) are both provided with a zinc coating.

Images