Worm and gear self-locking type locking strip

Abstract

The utility model relates to the technical field of electronic equipment, and discloses a worm gear and worm self-locking type locking strip which comprises an installation base with a containing cavity, a worm is rotatably installed in the containing cavity, the two ends of the worm penetrate through the corresponding inner walls of the containing cavity respectively, and a worm gear meshed with the worm is further rotatably installed in the containing cavity. A cam is integrally formed on the worm gear in the radial direction, and the worm is used for controlling the cam to enter and exit the containing cavity. The jacking mechanism has the advantages that the jacking effect in the height direction is achieved through the transmission principle of the turbine and the worm and the cam structure, meanwhile, the turbine and worm structure belongs to one-way transmission, in other words, movement can only be transmitted to the turbine through the worm, and therefore the structure has good self-locking performance and is suitable for being used in high-frequency periodic vibration.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic equipment, in particular to a worm gear self-locking locking strip. Background Art

[0002] Locking strips are mainly used on boards in electronic chassis to reinforce the board and chassis, reduce the vibration of the board during transportation and use, and also play a role in heat conduction. Locking strips of different lengths and heights can be selected according to usage requirements. The locking effect of the locking strip plays a significant role in the vibration of the module.

[0003] The Chinese utility model patent (authorization announcement number: CN219718851U name: a VPX cooling board) includes a cooling shell, in which a 3UVPX mainboard and a 3UVPX expansion board are arranged, the 3UVPX mainboard is electrically connected to the 3UVPX expansion board through a signal line, and the 3UVPX mainboard and the 3UVPX expansion board are arranged side by side to keep consistent with the specifications of the 6UVPX mainboard; the present invention is suitable for the development of VPX boards, and can make the 3UVPX mainboard compatible with the 6UVPX mainboard in structure and signal, so that it can also be used normally on 6U specification equipment, which improves the utilization rate of the 3UVPX mainboard, reduces repeated development costs, improves development efficiency, and avoids waste of research and development resources, but its locking strip adopts a threaded locking method, which is easy to loosen in high-frequency periodic vibration. Utility Model Content

[0004] The utility model aims to provide a worm gear self-locking locking strip to overcome the shortcomings of the prior art.

[0005] The purpose of the utility model is achieved through the following technical solutions: a worm gear self-locking locking strip, comprising a mounting seat with an accommodating cavity, a worm is rotatably mounted in the accommodating cavity, two ends of the worm respectively penetrate the corresponding inner walls of the accommodating cavity, a worm wheel meshing with the worm is also rotatably mounted in the accommodating cavity, a cam is integrally formed on the worm wheel along its radial direction, and the worm is used to control the cam to enter and exit the accommodating cavity.

[0006] Preferably, a limiting boss A is integrally formed on the worm wheel along its radial direction, and the limiting boss A is used to control the maximum rotation angle of the cam out of the accommodating cavity.

[0007] Preferably, a B-limiting boss is integrally formed on the worm wheel along its radial direction, and the B-limiting boss is used to control the maximum rotation angle of the cam into the accommodating cavity.

[0008] Preferably, the helical teeth on the worm are composed of two sections, the rotation directions of the two sections of the helical teeth are opposite, and there are two worm wheels, which are respectively meshed with the helical teeth of corresponding rotation directions.

[0009] Preferably, a through hole is formed at the bottom of the accommodating cavity.

[0010] Preferably, a hexagonal hole is provided at one end of the worm, and a limiting step is provided at the other end of the worm, and the limiting step is located in the accommodating cavity. An annular groove is also provided on the worm, and a retaining ring is installed in the annular groove. The retaining ring is used to prevent the limit platform from shifting in the accommodating cavity.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The lifting effect in the height direction is achieved by utilizing the transmission principle of the worm gear and the cam structure. At the same time, the worm gear structure itself is a one-way transmission, that is, the movement can only be transmitted from the worm to the turbine. Therefore, the structure has good self-locking properties and is suitable for use in high-frequency periodic vibrations. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0015] Figure 3 is a schematic diagram of the structure of the mounting base;

[0016] Figure 4 is a schematic diagram of the structure of the worm;

[0017] Figure 5 is a schematic diagram of the structure of the worm gear;

[0018] In the figure, 1-mounting seat, 2-worm, 3-worm wheel, 4-cam, 5-A limiting boss, 6-B limiting boss, 7-through hole, 8-retaining ring, 9-annular groove. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figure 1-5As shown, a worm gear self-locking locking strip comprises a mounting seat 1 with an accommodating cavity, a worm 2 is rotatably mounted in the accommodating cavity, two ends of the worm 2 respectively penetrate the corresponding inner walls of the accommodating cavity, a worm wheel 3 meshing with the worm 2 is also rotatably mounted in the accommodating cavity, a cam 4 is integrally formed on the worm wheel 3 along its radial direction, the worm 2 is used to control the cam 4 to enter and exit the accommodating cavity, and a lifting effect in the height direction is achieved by utilizing the transmission principle of the turbine worm 2 and the structure of the cam 4. At the same time, the structure of the turbine worm 2 itself is a one-way transmission, that is, the movement can only be transmitted to the turbine by the worm 2. Therefore, the structure has good self-locking properties and is suitable for use in high-frequency periodic vibrations.

[0026] In this embodiment, if Figure 5 As shown, a limiting boss 5 is integrally formed on the worm wheel 3 along its radial direction. The limiting boss 5 is used to control the maximum rotation angle of the cam 4 out of the accommodating cavity to prevent the worm wheel 3 from continuing to rotate after the cam 4 is locked in place, causing the cam 4 to damage the locked part.

[0027] In this embodiment, if Figure 5 As shown, a B-limiting boss 6 is integrally formed on the worm wheel 3 along its radial direction. The B-limiting boss 6 is used to control the maximum rotation angle of the cam 4 into the accommodating cavity to prevent the worm wheel 3 from continuing to rotate after the cam 4 completely enters the accommodating cavity, causing the cam 4 to hit the worm 2 and cause damage.

[0028] In this embodiment, if Figure 2 As shown, the helical teeth on the worm 2 are composed of two sections, and the rotation directions of the two sections of helical teeth are opposite. There are two worm wheels 3, and the two worm wheels 3 are respectively engaged with the helical teeth of corresponding rotation directions. The purpose of using a worm 2 with two sections of helical teeth with different rotation directions is to make the forces in the axial direction offset each other, so that all forces are borne by the double-helix worm 2, thereby providing stability and durability of the structure.

[0029] In this embodiment, if Figure 2 As shown, a through hole 7 is provided at the bottom of the accommodating cavity, and bolts are installed in the through hole 7, so that the mounting seat 1 can be firmly fixed by the bolts.

[0030] In this embodiment, if Figure 2 and 4 As shown, a hexagonal hole is provided at one end of the worm 2, and a limiting step is provided at the other end of the worm 2. The limiting step is located in the accommodating cavity. An annular groove 9 is also provided on the worm 2, and a retaining ring 8 is installed in the annular groove 9. The retaining ring 8 is used to prevent the limit platform from shifting in the accommodating cavity, to prevent the worm 2 from slipping due to the axial force, causing the cam 4 to shift, and causing the cam 4 to be misaligned with the locking position.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A worm gear self-locking locking strip, comprising a mounting seat (1) having a receiving cavity, characterized in that: A worm (2) is rotatably mounted in the accommodating cavity, with two ends of the worm (2) respectively penetrating corresponding inner walls of the accommodating cavity. A worm wheel (3) meshing with the worm (2) is also rotatably mounted in the accommodating cavity, with a cam (4) integrally formed on the worm wheel (3) along its radial direction. The worm (2) is used to control the cam (4) to enter and exit the accommodating cavity.

2. A worm gear self-locking locking strip according to claim 1, characterized in that: A limiting boss (5) is integrally formed on the worm wheel (3) along its radial direction, and the limiting boss (5) is used to control the maximum rotation angle of the cam (4) out of the accommodating cavity.

3. A worm gear self-locking locking strip according to claim 1, characterized in that: A B limiting boss (6) is integrally formed on the worm wheel (3) along its radial direction, and the B limiting boss (6) is used to control the maximum rotation angle of the cam (4) into the accommodating cavity.

4. The worm gear self-locking locking strip according to claim 1, characterized in that: The helical teeth on the worm (2) are composed of two sections, the rotation directions of the two sections of the helical teeth are opposite, the worm wheels (3) are two, and the two worm wheels (3) are respectively meshed with the helical teeth of corresponding rotation directions.

5. The worm gear self-locking locking strip according to claim 1, characterized in that: A through hole (7) is provided at the bottom of the accommodating cavity.

6. The worm gear self-locking locking strip according to claim 1, characterized in that: A hexagonal hole is provided at one end of the worm (2), and a limiting step is provided at the other end of the worm (2). The limiting step is located in the accommodating cavity. An annular groove is also provided on the worm (2), and a retaining ring (8) is installed in the annular groove. The retaining ring (8) is used to prevent the limiting platform from shifting in the accommodating cavity.

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