Self-locking sealing structure and ball screw

Abstract

The utility model discloses a self -locking type sealing structure and ball screw, including the screw mother, the end of screw mother is provided with the mounting groove, installs the sealing ring and the fixing spare in the mounting groove, and the fixing spare sets up in the sealing ring outside for fixing sealing ring, the outer periphery of sealing ring is equipped with a plurality of convex parts, the outer periphery of fixing spare is equipped with a plurality of self -locking devices with the same number of convex parts, the self -locking device will the convex part fix in the mounting groove, the utility model discloses through the fixing spare and sealing ring common space, and they do not help screw self -locking installation, has saved the design space of mounting groove, and the installation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of ball screw technology, specifically to a self-locking sealing structure and a ball screw. Background Technology

[0002] When a ball screw operates at high speed, a large amount of friction is generated between the raceway and the steel balls. To reduce the wear caused by friction on the steel balls or raceway, seals are installed at both ends of the nut. This serves two purposes: first, to prevent the lubricant inside the nut from easily leaking out and prolonging the lubrication effect; and second, to prevent foreign objects from entering and causing additional friction, thereby extending the service life of the ball screw.

[0003] Currently, most common methods for installing sealing rings involve installing the sealing ring first, and then using fixing elements such as spring clips, washers, screws, and sealing caps for fixation. The sealing ring is then fixed in the mounting groove through the cooperation of the fixing elements and the nut.

[0004] In existing technologies, some sealing rings require additional fasteners, such as gaskets and sealing caps, which need to be secured with screws. This method of fixing is relatively secure, but it not only increases additional costs but also requires consideration of the position and depth of the threaded hole in the nut, increasing the design difficulty of the nut. Furthermore, it is far more difficult and time-consuming to install than other fixing methods. Existing technologies also include gaskets, a fixing method that requires no additional parts. While this reduces installation difficulty and cost, its small contact surface makes the fixing of the sealing ring less stable. Utility Model Content

[0005] To address the technical problems of large space occupation, high cost, difficult installation, and unstable fixation in existing technologies, this utility model provides a self-locking sealing structure and ball screw. By sharing space with the fixing component and sealing ring, the two are self-lockingly installed without the aid of screws, thus solving the aforementioned technical problems. The technical solution of this utility model is as follows: A self-locking sealing structure includes a nut, the end of which is provided with an installation groove. A sealing ring and a fixing member are installed in the installation groove. The fixing member is located outside the sealing ring for fixing the sealing ring. The outer circumferential surface of the sealing ring is provided with a plurality of protrusions. The outer circumferential surface of the fixing member is provided with a plurality of self-locking devices equal to the number of protrusions. The self-locking devices fix the protrusions in the installation groove.

[0006] Furthermore, the self-locking device includes a main body protrusion, a pressure plate, and an elastic element. The main body protrusion is integrally designed with the fixing element, and the pressure plate is connected to the main body protrusion through the elastic element.

[0007] Furthermore, the mounting groove includes a first mounting groove and a second mounting groove, the first mounting groove is located inside the second mounting groove, and the opening size of the second mounting groove is smaller than the opening size of the first mounting groove.

[0008] Furthermore, the protruding part of the sealing ring is located in the first mounting groove, the left end face of the protruding part contacts and limits the end face of the first mounting groove, and the right end face of the protruding part contacts and limits the end face of the main body protrusion on the side away from the pressure plate.

[0009] Furthermore, a first latch is provided at the location where the second mounting groove is adjacent to the first mounting groove, and the end face of the main body protrusion on the side away from the pressure plate is latched into the first latch.

[0010] Furthermore, the end face of the main body protrusion away from the pressure plate is provided with a second latch, which engages with the junction of the second mounting groove and the first mounting groove.

[0011] Furthermore, the sealing ring has multiple protrusions on the end face near the fixing member, and the fixing member has multiple insertion holes, with the protrusions engaging with the insertion holes.

[0012] Furthermore, a lip is provided on the inner circumferential surface of the sealing ring.

[0013] This utility model also provides a ball screw, which further includes a screw shaft passing through the screw nut. The screw shaft is provided with the above-mentioned self-locking sealing structure. When the screw shaft rotates, it drives the screw nut to move along the screw shaft axis.

[0014] Based on the above technical solution, the technical effects that this utility model can achieve are as follows: 1. The self-locking sealing structure of this utility model reduces the width of the nut mounting groove by utilizing the cooperation between the fixing component and the sealing ring, providing more space for the nut design; the sealing ring is fixed by the self-locking device of the fixing component, without relying on other fasteners, thus reducing production costs.

[0015] 2. The self-locking sealing structure of this utility model utilizes the mounting groove shared by the sealing ring and the fixing component, so that the installation positions of the two are no longer independent, saving the design space of the mounting groove; and the elastic component and the mounting groove of the nut itself are used for limiting, making installation convenient.

[0016] 3. The self-locking sealing structure of this utility model utilizes the mutual restraint of the nut, sealing ring, and fixing component to form a self-locking structure with stable structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the mother silk. Figure 3 This is a schematic diagram of the sealing ring structure; Figure 4 This is a structural schematic diagram of the fastener; Figure 5 This is a schematic diagram of the self-locking device; Figure 6 Assembly of self-locking sealing structure Figure 1 ; Figure 7 Assembly of self-locking sealing structure Figure 2 ; Figure 8 This is a schematic diagram of the structure of the second embodiment of the present invention; Figure 9 This is a structural schematic diagram of the third embodiment of the present utility model; In the diagram: 1. Nut; 11. First mounting slot; 12. Second mounting slot; 121. First bayonet. 2. Sealing ring; 21. Protrusion; 22. Raise; 23. Lip. 3. Fixing component; 31. Self-locking device; 311. Main body protrusion; 3111. Second bayonet; 312. Pressure plate; 313. Elastic component; 32. Insertion hole. Detailed Implementation

[0018] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. Example

[0019] like Figure 1-4 As shown, this embodiment provides a self-locking sealing structure, including a nut 1. The end of the nut 1 is provided with an installation groove. A sealing ring 2 and a fixing member 3 are installed in the installation groove. The fixing member 3 is provided on the outside of the sealing ring 2 to fix the sealing ring 2. The outer peripheral surface of the sealing ring 2 is provided with a plurality of protrusions 21 for cooperating with the nut installation groove. The outer peripheral surface of the fixing member 3 is provided with a plurality of self-locking devices 31, the same number as the protrusions 21. The self-locking devices 31 fix the protrusions 21 in the installation groove.

[0020] In this embodiment, the inner circumferential surface of the sealing ring is provided with a lip to fit the lead screw shaft groove and ensure sealing.

[0021] like Figure 5As shown, the self-locking device 31 includes a main body protrusion 311, a pressure plate 312, and an elastic element 313. The main body protrusion 311 is disposed on the outer peripheral surface of the fixing element 3 and is integrally designed with the fixing element 3. The pressure plate 312 is disposed on one side of the main body protrusion 311 and is connected to the main body protrusion 311 through the elastic element 313.

[0022] like Figure 2 As shown, the mounting groove includes a first mounting groove 11 and a second mounting groove 12. The first mounting groove 11 is located inside the second mounting groove 12. The sealing ring protrusion 21 is disposed in the first mounting groove and is limited in the first mounting groove 11 by a self-locking device 31. In this embodiment, the opening size of the second mounting groove 12 is smaller than the opening size of the first mounting groove 11, and the sealing ring protrusion 21 is axially limited by the second mounting groove 12.

[0023] In this embodiment, the sealing ring protrusion 21 is located in the first mounting groove. The left end face of the protrusion 21 contacts and limits one end face of the first mounting groove 11, and the right end face of the protrusion 21 contacts and limits the end face of the main body protrusion 311 away from the pressure plate 312, thereby limiting the protrusion 21 in the first mounting groove 11.

[0024] In this embodiment, the pressure plate 312 contacts the other end face of the first mounting groove 11, and the elastic force of the elastic member 313 abuts the main body protrusion 311 against the right end face of the protrusion 21.

[0025] Preferred, such as Figure 3-4 As shown, the sealing ring 2 has multiple protrusions 22 on the end face near the fixing member 3, and the fixing member 3 has multiple insertion holes 32 that are inserted and engaged with the protrusions 22, so that the sealing ring 2 and the fixing member 3 form a self-locking mechanism; in this embodiment, the protrusions 22 and the insertion holes 32 are interference fit.

[0026] like Figure 6-7 As shown, the working principle of this utility model is as follows: First, the protrusion 21 of the sealing ring 2 is aligned with the groove of the second mounting groove 12 of the nut 1 and inserted into the first mounting groove 11. Then, it is rotated into the first mounting groove 11 to screw the protrusion 21 of the sealing ring 2 into the first mounting groove 11. Next, the self-locking device 31 of the fixing member 3 is inserted along the groove of the second mounting groove 12 of the nut 1 to limit the protrusion 21 of the sealing ring 2. Each surface of the fixing member 2 contacts and positions itself with each surface in the groove. The elastic member 313 provides a pushing force to the pressure plate 312 to compress the groove wall and form a fixation. The protrusion 311 of the main body of the fixing member contacts the protrusion 21 of the sealing ring 2 in the first mounting groove 11 to form a complete positioning. Example

[0027] like Figure 8As shown, the difference between this embodiment and embodiment one is that: a first latch 121 is provided at the second mounting groove 12 adjacent to the first mounting groove 11. After the self-locking device 31 of the fastener 3 is inserted along the groove of the second mounting groove 12 of the nut 1, the end face of the main body protrusion 311 on the side away from the pressure plate 312 is latched onto the first latch 121, thereby axially limiting the fastener 3. Example

[0028] like Figure 9 As shown, the difference between this embodiment and embodiment one is that a second latch 3111 is provided on the end face of the main body protrusion 311 away from the pressure plate 312. The second latch 3111 is engaged at the junction of the first mounting groove 11 and the second mounting groove 12 to axially limit the fixing member 3.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A self-locking sealing structure, comprising a nut (1), an installation groove provided at the end of the nut (1), a sealing ring (2) and a fixing member (3) installed in the installation groove, the fixing member (3) being disposed outside the sealing ring (2) for fixing the sealing ring (2); characterized in that, The outer circumferential surface of the sealing ring (2) is provided with a plurality of protrusions (21), and the outer circumferential surface of the fastener (3) is provided with a plurality of self-locking devices (31) in the same number as the protrusions (21). The self-locking devices (31) fix the protrusions (21) in the mounting groove.

2. The self-locking sealing structure according to claim 1, characterized in that, The self-locking device (31) includes a main body protrusion (311), a pressure plate (312) and an elastic element (313). The main body protrusion (311) is integrated with the fixing element (3), and the pressure plate (312) is connected to the main body protrusion (311) through the elastic element (313).

3. The self-locking sealing structure according to claim 2, characterized in that, The mounting slot includes a first mounting slot (11) and a second mounting slot (12). The first mounting slot (11) is located inside the second mounting slot (12), and the opening size of the second mounting slot (12) is smaller than the opening size of the first mounting slot (11).

4. The self-locking sealing structure according to claim 3, characterized in that, The protrusion (21) of the sealing ring (2) is located in the first mounting groove (11). The left end face of the protrusion (21) contacts and limits the end face of the first mounting groove (11). The right end face of the protrusion (21) contacts and limits the end face of the main body protrusion (311) on the side away from the pressure plate (312).

5. The self-locking sealing structure according to claim 4, characterized in that, The second mounting groove (12) is provided with a first latch (121) adjacent to the first mounting groove (11), and the end face of the main body protrusion (311) on the side away from the pressure plate (312) is latched in the first latch (121).

6. The self-locking sealing structure according to claim 4, characterized in that, The main body protrusion (311) has a second latch (3111) on the end face away from the pressure plate (312), and the second latch (3111) is engaged at the junction of the second mounting groove (12) and the first mounting groove (11).

7. The self-locking sealing structure according to claim 1, characterized in that, The sealing ring (2) has multiple protrusions (22) on the end face near the fixing member (3), and the fixing member (3) has multiple insertion holes (32), with the protrusions (22) cooperating with the insertion holes (32).

8. The self-locking sealing structure according to claim 1, characterized in that, The sealing ring (2) has a lip on its inner circumferential surface.

9. A ball screw, characterized in that, It also includes a lead screw shaft passing through the lead screw nut (1), the lead screw shaft being provided with a self-locking sealing structure as described in any one of claims 1-8, the lead screw shaft rotating, driving the lead screw nut (1) to move axially along the lead screw shaft.

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