CN209977045U

CN209977045U - Self-locking assembly and tuning device using same

Info

Publication number: CN209977045U
Application number: CN201920699466.3U
Authority: CN
Inventors: 邹骥; 陈瑞斌
Original assignee: SHENZHEN GRENTECH Corp
Current assignee: Shenzhen Guoren Technology Co., Ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-01-21
Anticipated expiration: 2029-05-16

Abstract

The utility model relates to a auto-lock subassembly and applied this kind of auto-lock subassembly's tuner, this auto-lock subassembly include tuning screw and fastener, the fastener has axial perforating hole, the perforating hole includes internal thread portion, tuning screw install in internal thread portion, tuning screw include external screw thread section and form the tuning section in external screw thread section one end, the external screw thread of external screw thread section and the interior screw-thread fit of internal thread portion, the tuning section part stretches out and is located outside the fastener from the one end of internal thread portion, thereby external screw thread and internal thread one of them is nonstandard pitch screw thread, another one of them is standard pitch screw thread and can produce the locking force at fitting surface between the two to the realization is locked tuning screw to the fastener. The utility model discloses can realize locking the fastener with tuning screw, and be difficult for absolutely, occupation space is little, and is with low costs, and workable is fit for batch production.

Description

Self-locking assembly and tuning device using same

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the technical field of the radio frequency communication technique and specifically relates to a tuning device of auto-lock subassembly and applied this kind of auto-lock subassembly is related to.

[ background of the invention ]

At present, a radio frequency device generally adopts a mode that a tuning screw rod extends into a resonant cavity for tuning, and the locking of the existing tuning screw rod is roughly divided into two types: the first type is a full-thread screw with a nut lock. The advantages are suitable for mass processing, low price and large occupied space; the second type is a self-locking screw with two sections of staggered teeth and cutting grooves, which is screwed into a threaded sleeve pressed and riveted on a cover plate. The advantages are good self-locking force, small occupied space, difficult grooving, limited productivity, high price and easy breakage.

With the development of the technical field of radio frequency communication, the frequency band is higher, the device is smaller, and the first type of full-thread screw is more and more difficult to be suitable for miniaturized products due to large occupied space; the second type of self-locking screw is also increasingly difficult to meet the product requirements due to productivity, price and easy breakage.

[ Utility model ] content

An object of the utility model is to overcome the not enough of above-mentioned technique, provide a tuning device of auto-lock subassembly and applied this kind of auto-lock subassembly, occupation space is little, and is difficult disconnected, and is with low costs, and workable.

The utility model discloses a first aspect provides a self-locking assembly, including tuning screw and fastener, the fastener has axial perforating hole, the perforating hole includes internal thread portion, tuning screw install in internal thread portion, tuning screw include external screw thread section and form the tune section in external screw thread section one end, the external screw thread of external screw thread section and the interior screw-thread fit of internal thread portion, the tune section part stretches out and is located outside the fastener from the one end of internal thread portion, thereby external screw thread and internal thread one of them is nonstandard pitch screw thread, another one of them can produce the locking force for the fitting surface between the two for standard pitch screw thread to the realization is locked the tuning screw to the fastener.

Further, the tuning section has an outer diameter smaller than a maximum outer diameter of the external threaded section, and the through hole further includes a locking portion formed in one end of the internal threaded portion, the locking portion cooperating with the tuning section for preventing the tuning screw from falling out of the internal threaded portion of the fastener.

Further, the length of the clamping part is 1-1.5 thread pitch lengths of the standard thread pitch threads.

Further, the external thread is a non-standard pitch thread, and the internal thread is a standard pitch thread.

Further, the external thread is a full thread.

Further, the external thread is composed of multiple segments of sub-threads.

Further, the outer surface of the tuning section is smooth.

Further, the outer surface of the tuning section has an external thread.

Further, the fastener is a nut or a threaded sleeve.

A second aspect of the present invention provides a tuning apparatus, including the resonant cavity, install the apron of resonant cavity open end and install the resonance post in the cavity, the resonance post has the resonant cavity, still include in any one of the above technical scheme auto-lock subassembly, the fastener is installed in the mounting hole of apron, the part of the tuning section of tuning screw rod that is located outside the fastener stretches into in the resonant cavity.

The utility model discloses can produce the locking force between harmonious screw rod and fastener to can realize locking the fastener with harmonious screw rod, difficult disconnected, and occupation space is little, and is with low costs, and workable is fit for batch production.

[ description of the drawings ]

Fig. 1 is a schematic cross-sectional view of a self-locking assembly according to an embodiment of the present invention;

FIG. 2 is a cross-sectional schematic view of the fastener of the self-locking assembly of FIG. 1;

FIG. 3 is a cross-sectional schematic view of the tuning screw of the self-locking assembly of FIG. 1;

fig. 4 is a schematic top view of the tuning screw of fig. 3.

[ detailed description ] embodiments

The invention is further described with reference to the following figures and examples.

Referring to fig. 1-3, the present invention provides a self-locking assembly 100 comprising a tuning screw 10 and a fastener 20. The fastener 20 has an axial through hole including a female screw portion 21, and the tuning screw 10 is attached to the female screw portion 21. The tuning screw 10 comprises an external threaded section 11 and a tuning section 12 formed at one end of the external threaded section 11, the external thread of the external threaded section 11 being engaged with the internal thread of the internal threaded portion 21, the tuning section 12 partially protruding from one end of the internal threaded portion 21 and being located outside the fastener 20 for protruding into the resonance cavity of the tuning device. The external screw thread is non-standard pitch screw thread, the internal thread is standard pitch screw thread so can produce locking force at the fitting surface between the two, because the internal thread of the complete thread number of external screw thread cooperation of little pitch difference can produce suitable friction, atress at the fitting surface between the two to realize producing locking force, it is difficult disconnected, thereby can realize locking the fastener 20 with tuning screw 10 through external screw thread and internal thread cooperation.

With the above-described structure, it is possible to generate a locking force between the tuning screw 10 and the fastening member 20, thereby achieving locking of the tuning screw 10 to the fastening member 20, and by changing the position where the external thread is engaged with the internal thread, it is possible to change the length of the portion of the tuning section 12 protruding from the internal thread portion 21, thereby changing the length of the portion protruding into the cavity of the tuning device, thereby achieving tuning of the frequency. For example, taking a standard pitch of 0.35 as an example, when the internal thread of the fastener 20 is a standard pitch thread of m2.5x0.35-6H, and the external thread of the tuning screw 10 is a non-standard pitch thread of m2.5x0.39-6g, the number of full threads of the internal thread is 3, and the mating surface between the external thread and the internal thread can generate a torque (i.e., a locking force) in the range of 3-6N · cm (N · cm), a use frequency of more than 5 times, and a tuning depth (i.e., a length of the tuning section 12 extending into the resonant cavity of the tuning device can be increased or decreased by 2 mm). By adjusting different pitch values, complete thread tooth counts, different torques, use times and tuning depths will be produced.

The tuning section 12 has an outer diameter smaller than the maximum outer diameter of the externally threaded section 11, and the through-hole further includes a catching portion 22 formed in one end of the internally threaded portion 21, the catching portion 22 cooperating with the tuning section 12 for preventing the tuning screw 10 from falling out of the internally threaded portion 21 of the fastener 20. Preferably, the length of the gripping portion 22 is 1-1.5 pitch lengths of standard pitch threads.

The external thread section 11 and the tuning section 12 are integrally formed. The female screw portion 21 and the engagement portion 22 are integrally formed.

When the tuning screw 10 is actually mounted to the internal thread portion 21 of the fastener 20, the tuning section 12 is first inserted into the internal thread portion 21 and the locking portion 22, the external thread section 11 is aligned with the internal thread portion 21, and then the external thread section 11 is screwed into the internal thread portion 21 by the engagement of the tuning screw 10 with the notch 111, so that the internal thread portion 21 of the fastener 20 can be mounted with the tuning screw 10. When the self-locking assembly 100 is practically applied to a tuning device, the screw-in of the external thread section 11 into the internal thread part 21 can be realized at different depths by matching the screwdriver head with the notch 11, so that the length of the tuning section 12 partially extending into the resonant cavity of the tuning device can be changed, and the tuning frequency can be realized.

In this embodiment, as shown in fig. 4, the cross-sectional shape of the notch 111 is a hexagonal-inside-plum-blossom shape. It is understood that the cross-sectional shape of the notch 111 may also be, for example, a straight line, a cross, a triangle, or a polygon, etc.

The outer surface of the tuning section 12 is smooth. It will be appreciated that the outer surface of the tuning section 12 may also be externally threaded. The end surface of the tuning section 12 far away from the external thread section 11 is a cambered surface. It is understood that the end surface of the tuning section 12 away from the external thread section 11 may be a flat surface, for example, and may be set according to actual conditions.

The end of the internal threaded portion 21 remote from the latching portion 22 has a chamfer provided to facilitate screwing of the external threaded section 11 into the internal threaded portion 21.

In this embodiment, the external screw thread is full thread, and understandably, the external screw thread also can be composed of multiple sections of sub-screw threads, and can be selected according to actual conditions.

The fastener 20 is a nut. It will be appreciated that the fastener 20 may also be, for example, a threaded sleeve.

In this embodiment, the overall profile of the tuning screw 10 and the overall profile of the fastener 20 are formed by cold heading or turning. The tuning screw 10 is made of copper or steel. The notch 111 of the tuning screw 10 is formed for a cold heading or a punch. The external thread of the external thread section 11 is formed by thread rolling or turning. The internal thread of the internal thread portion 21 is formed by thread rolling or turning.

In other embodiments, the external thread is a standard pitch thread, the internal thread is a non-standard pitch thread, and the external thread and the internal thread are matched to achieve the technical effects. The internal thread in this embodiment is a full thread or is comprised of multiple sub-threads.

The utility model discloses can produce the locking force between tuning screw rod 10 and fastener 20 to can realize locking tuning screw rod 10 to fastener 20, difficult disconnected, and occupation space is little, and with low costs, workable is fit for batch production.

The utility model also provides a tuning device, including the resonant cavity, install the apron of resonant cavity open end, install the resonance post in the cavity and foretell auto-lock subassembly 100. The resonant column has a resonant cavity. The fastener 20 of the self-locking assembly 100 is mounted in the mounting hole of the cover plate, for example, by means of clinching, so that the tuning screw 10 of the self-locking assembly 100 is fixed to the cover plate by the fastener 20 of the self-locking assembly 100, and the tuning section 12 of the tuning screw 10, which is located outside the fastener 20, extends into the resonant cavity. The tuning frequency is achieved by varying the position of the external thread of the tuning screw 10 in cooperation with the internal thread of the fastener 20, thereby varying the length of the tuning section 12 partially extending into the cavity. The utility model discloses a tuning device occupation space is little, with low costs, easily equipment.

The above examples only represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, such as combinations of different features in the various embodiments, which are within the scope of the present invention.

Claims

1. A self-locking assembly comprising a tuning screw and a fastener, characterized in that: the fastener has axial perforating hole, the perforating hole includes internal thread portion, tuning screw install in internal thread portion, tuning screw include external screw thread section and form the tuning section in external screw thread section one end, the external screw thread of external screw thread section and the interior screw-thread fit of internal thread portion, tuning section part stretches out and is located outside the fastener from the one end of internal thread portion, thereby external screw thread and internal thread one of them is non-standard pitch screw thread, and another one of them is standard pitch screw thread and can produce locking force at the fitting surface between the two to the realization is locked the tuning screw to the fastener.

2. The self-locking assembly of claim 1, wherein: the outer diameter of the tuning section is smaller than the maximum outer diameter of the external thread section, the through hole further comprises a clamping part formed in one end of the internal thread part, and the clamping part is matched with the tuning section to prevent the tuning screw from falling out of the internal thread part of the fastener.

3. The self-locking assembly of claim 2, wherein: the length of the clamping part is 1-1.5 of the thread pitch length of the standard thread pitch thread.

4. The self-locking assembly of claim 1, wherein: the external thread is a non-standard pitch thread, and the internal thread is a standard pitch thread.

5. The self-locking assembly of claim 4, wherein: the external thread is a full thread.

6. The self-locking assembly of claim 4, wherein: the external thread is composed of multiple sections of sub-threads.

7. The self-locking assembly of claim 1, wherein: the outer surface of the tuning section is smooth.

8. The self-locking assembly of claim 1, wherein: the outer surface of the tuning section has external threads.

9. The self-locking assembly of claim 1, wherein: the fastener is a nut or a threaded sleeve.

10. A tuning arrangement comprising a resonant cavity, a cover plate mounted to an open end of the resonant cavity, and a resonant column mounted in the cavity, the resonant column having a resonant cavity, wherein: the self-locking assembly of any one of claims 1 to 9, further comprising a fastener mounted in the mounting hole of the cover plate, wherein a portion of the tuning section of the tuning screw, which portion is outside the fastener, extends into the resonant cavity.