Non-disengagement locking type grounding pole for avionics equipment

Abstract

The invention, which relates to the field of grounding equipment, discloses a non-loosening locking type grounding column for avionics equipment, comprising a nut assembly, a main screw rod, a spring washer, a flat washer and a nut. The upper end and the lower end of the main screw are studs, the upper stud is used for installing a lap joint wire and a nut assembly, the lower stud is used for installing the grounding pole and one end of the stainless steel band of the grounding pole on electronic equipment, and the grounding pole and the stainless steel band are locked through a spring washer, a flat washer and a nut during installation. The designed nut, the hold-down ring, the stainless steel band and the locking washer are made into the nut assembly through the riveting technology, the nut assembly has the reliability and non-destructive advantages of locking by means of elastic restoring force of a traditional spring washer, and meanwhile the problem that the traditional spring washer and a flat washer cannot be applied to the aviation airborne platform grounding pole due to falling off is solved.

Description

Technical Field

[0001] The invention relates to the field of grounding equipment, and in particular to a non-detachable locking grounding column for avionics equipment. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] In avionics equipment, grounding is one of the important means to suppress electromagnetic noise, prevent interference, and ensure the safety of equipment and operators. The housing panel of avionics equipment is usually equipped with a conductive grounding column, and a nut is used to fix the bonding wire on the top of the grounding column to obtain reliable electrical contact between metals. The ends of the bonding wire are mainly divided into O-type, J-type and Y-type on the airborne platform. According to the requirements of the corresponding aircraft platform, the grounding column should be adapted to bonding wires with different end types.

[0004] At the same time, on airborne platforms, there are strict requirements for external attachments and their devices fixed with nuts. According to the adaptability requirements of the airborne environment and the requirements of GJB1B-1995, the installation of the grounding column must meet the design requirements of anti-loosening, reliability and maintainability. The fixing method of the lap wire compression nut should be convenient and quick to disassemble and assemble, and the loosened nut should not fall off.

[0005] In order to meet the above requirements, the grounding posts that are widely used in avionics equipment are divided into two forms:

[0006] One is a non-detachable locking type in which the nut cannot be unscrewed from the main screw. This type of grounding post is usually locked with a spring washer, which relies on the elastic restoring force of the spring washer to increase the friction between the thread pairs to achieve a locking and anti-loosening effect. However, since it is equipped with anti-loosening components such as spring washers that are easy to fall off, the nut and the main screw are designed to be inseparable, which makes it only suitable for non-fully enclosed bonding terminals such as J-type and Y-type, and the applicable scenarios are relatively limited;

[0007] The other is a non-detachable locking type that connects the nut with a metal band. The nut of this type of grounding column can be unscrewed from the main screw, and the main screw and the nut are connected by a metal band so that the nut will not fall off after being removed. The nut of this type of grounding column is usually designed with serrations, and its locking is mainly guaranteed by the friction between the serrations on the surface of the nut and the terminal of the jumper wire after being pressed. However, the serrations on the serrated anti-slip nut are destructive and will irreversibly damage the jumper terminal. In addition, due to damage to the terminal surface, it is difficult to ensure the locking after multiple disassembly and maintenance. Summary of the invention

[0008] The purpose of the present invention is to provide a non-detachable locking grounding column for avionics equipment in view of the defects of the above-mentioned prior art, which is convenient for disassembly and assembly, has more reliable locking, and is adaptable to various types of terminals.

[0009] The technical solution of the present invention is as follows:

[0010] A non-detachable locking grounding column for avionics equipment comprises: a nut assembly, a main screw and a nut; the main screw comprises: an upper stud, a lower stud and a fixing piece, the upper stud and the lower stud are respectively located on both sides of the fixing piece; the upper stud is used to install a grounding wire terminal and a nut assembly; the lower stud is used to install the grounding column itself on the electronic equipment, and is locked by the nut during installation.

[0011] Furthermore, the fixing piece is a hexagonal flange.

[0012] Furthermore, the nut assembly includes: a nut, a stainless steel strip, a locking washer and a clamping ring; the nut and the clamping ring are connected by an expansion riveting process, and after riveting, the stainless steel strip and the locking washer are installed between the two, and the other end of the stainless steel strip is connected to the electronic device through a nut.

[0013] Furthermore, the outer edge of the clamping ring is designed to completely wrap the locking washer to prevent the stainless steel belt from entering the gap between the locking washer and the nut during disassembly and assembly.

[0014] Furthermore, the clamping ring and locking washer have axial freedom on the nut, and are limited by the expanded riveted edge of the nut and the boss at the installation position of the locking washer, and the movable gap is larger than the non-compressed thickness of the locking washer, so as to provide the locking washer with compression and recovery space for elastic deformation; in the non-locked state, the locking washer is in a non-compressed state, and both the locking washer and the clamping ring can move along the axial direction of the nut.

[0015] Furthermore, it also includes: a flat washer and a spring washer; when the lower stud installs the grounding column itself on the electronic equipment, it is locked by the nut, the flat washer and the spring washer.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention uses a riveting process to make a nut assembly by combining the designed nut, compression ring, stainless steel belt and locking washer, which has the reliability and non-destructive advantages of traditional spring washers that rely on elastic restoring force to lock, and at the same time solves the problem that traditional spring washers and flat washers cannot be used in grounding columns of aviation airborne platforms because they will fall off.

[0018] 2. The grounding column designed by the present invention has a simple structure and is easy to process. The nut assembly can be completely removed from the main screw and is secured to the grounding column body by a stainless steel belt. It can also be applied to different types of lap wires such as O-type, J-type and Y-type on airborne platforms.

[0019] 3. The present invention designs the upper end of the nut assembly as a hexagon with a slotted groove, and designs the outer edge of the nut assembly as a cylinder with knurling. It can be operated by a hexagon socket wrench, a slotted screwdriver, and bare hands, and the disassembly and assembly methods are convenient and diverse. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the external structure of the grounding column;

[0021] Figure 2 This is the exploded view of the grounding column;

[0022] Figure 3 This is an exploded view of the nut assembly;

[0023] Figure 4 It is a front cross-sectional view of the nut assembly expansion and riveting;

[0024] Figure 5 This is a cross-sectional view of the nut assembly after expansion and riveting;

[0025] Figure 6 It is a cross-sectional view of the limit position of the compression ring of the nut assembly in the non-locked state;

[0026] Figure 7 It is a cross-sectional view of the nut assembly in the locked state.

[0027] Figure markings: 1-nut assembly, 2-main screw, 3-flat washer, 4-spring washer, 5-nut, 11-nut, 12-stainless steel band, 13-locking washer, 14-compression ring. DETAILED DESCRIPTION

[0028] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0030] Embodiment 1

[0031] See also Figure 1-2A non-detachable locking grounding column for avionics equipment, comprising a nut assembly 1, a main screw 2, a flat washer 3, a spring washer 4 and a nut 5, wherein the main screw 2 has studs at the upper and lower ends, a hexagonal flange at the middle end, the upper stud is used to install the grounding wire terminal and the nut assembly 1, and the lower stud is usually a chamfered cylinder, which is used to install the grounding column itself and one end of its stainless steel belt on the equipment, and is locked by the spring washer 4, the flat washer 3 and the nut 5 during installation.

[0032] See also Figure 3-Figure 6 . The nut assembly 1 consists of a nut 11, a stainless steel strip 12, a locking washer 13 and a clamping ring 14. The nut 11 and the clamping ring 14 are connected by an expansion riveting process. After riveting, the stainless steel strip 12 and the locking washer 13 are installed between the two, and there is a certain movable gap to form a nut assembly 1. The nut assembly 1 mainly plays the role of compressing the lap wire and locking, and is the main component for disassembly and assembly operations. The upper end of the nut assembly is a hexagonal body with a slotted groove, which can be conveniently tightened or disassembled using a hexagon socket wrench and a slotted screwdriver. The outer edge of the nut assembly 1 is a knurled cylinder, and the internal thread is used to connect the main screw 2, which is convenient for direct operation by hand; the other end of the stainless steel strip 12 is connected to the electronic equipment through a flat washer 3, a spring washer 4 and a nut 5, so that the nut assembly is still connected to the grounding column after being unscrewed and removed, and will not fall off.

[0033] The outer edge of the clamping ring 14 is designed to completely wrap the locking washer 13 , so as to prevent the stainless steel band 12 from entering the gap between the locking washer 13 and the nut 11 during assembly and disassembly, thereby damaging the stainless steel band 12 .

[0034] The clamping ring 14 and the locking washer 13 have axial freedom on the nut 11, and are limited by the expanded riveted edge of the nut 11 and the boss at the installation position of the locking washer 13, and the movable gap is larger than the non-compressed thickness of the locking washer 13, so as to provide the locking washer 13 with compression and recovery space for elastic deformation. In the non-locked state, the locking washer 13 is in a non-compressed state, and both the locking washer 13 and the clamping ring 14 can move along the axial direction of the nut 11.

[0035] See also Figure 7 In the locked state, the end face of the clamping ring 14 contacts the overlap line, and as the nut assembly 1 is screwed into the main screw 2, the clamping ring 14 moves axially, gradually compressing the locking washer 13, and finally squeezing the locking washer 13 into a compressed state, thereby achieving a locking effect.

[0036] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

[0037] This background section is provided to generally present the context of the invention, and the work of the presently named inventors, the work to the extent described in this background section, and aspects of this section that did not constitute prior art at the time of application are neither explicitly nor implicitly admitted to be prior art to the present invention.

Claims

1. A non-detachable locking grounding column for avionics equipment, characterized in that: include: Nut assembly, main screw and nut; The main screw includes: an upper stud, a lower stud and a fixing piece, wherein the upper stud and the lower stud are respectively located on both sides of the fixing piece; the upper stud is used to install the lap wire and the nut assembly; the lower stud is used to install the grounding column itself on the electronic device, and is locked by a nut during installation.

2. The non-detachable locking grounding column for avionics equipment according to claim 1, characterized in that: The fixing piece is a hexagonal flange.

3. The non-detachable locking grounding column for avionics equipment according to claim 2, characterized in that: The nut assembly includes: a nut, a stainless steel strip, a locking washer and a clamping ring; the nut and the clamping ring are connected by an expansion riveting process, and after riveting, the stainless steel strip and the locking washer are installed between the two, and the other end of the stainless steel strip is connected to the electronic device through a nut.

4. The non-detachable locking grounding column for avionics equipment according to claim 3, characterized in that: The outer edge of the clamping ring is designed to completely wrap the locking washer to prevent the stainless steel belt from entering the gap between the locking washer and the nut during disassembly and assembly.

5. The non-detachable locking grounding column for avionics equipment according to claim 4, characterized in that: The clamping ring and the locking washer have axial freedom on the nut, and are limited by the expanded riveted edge of the nut and the boss at the installation position of the locking washer, and the movable gap is larger than the non-compressed thickness of the locking washer, so as to provide the locking washer with compression and recovery space for elastic deformation; in the non-locked state, the locking washer is in a non-compressed state, and both the locking washer and the clamping ring can move along the axial direction of the nut.

6. The non-detachable locking grounding column for avionics equipment according to claim 5, characterized in that: Also includes: Flat washers and spring washers; when the lower stud is used to install the grounding column itself on the electronic equipment, it is locked by nuts, flat washers and spring washers.

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