High-vibration-resistance case fixing device

Abstract

The utility model belongs to the technical field of case installation, and particularly relates to a high-vibration-resistance case fixing device which comprises a case with a locker arranged at the front end, a bracket with a locker, a guide sleeve arranged at the rear end of the case and used for being inserted into a guide pin on the bracket, a first hole structure arranged at the front end of the case, a second hole structure arranged on the bracket, and a locking device arranged at the front end of the case. After the case is inserted into the bracket, holes in the first hole structure and the second hole structure can coincide in the insertion direction and can be detachably connected through screws or bolts. In a vibration environment, the front end of the case and the front end of the bracket are fixed through a hole structure, left-right swing of the front end of the case on the bracket can be limited, and environment resistance and mechanical properties of the case are kept; when the rear end of the machine case is connected with the bracket in an inserted mode, force in the left-right direction is prevented from being generated on the connector through continuous and effective locking, the connector is prevented from being stressed and deformed, and the electrical performance of the connector can be prevented from being affected.

Description

Technical Field

[0001] This utility model belongs to the field of chassis installation technology, specifically relating to a high vibration-resistant chassis fixing device. Background Technology

[0002] As the requirements for vibration intensity and duration of testing equipment gradually increase, existing chassis (such as 1ATR chassis or 8MCU and above chassis) typically achieve locking and fixation through two Class B locking devices at the front end in conjunction with guide pins and sleeves at the rear end and / or pluggable connectors. These chassis are generally heavy. The rear end of the chassis has guide sleeves, and the rear end of the bracket has guide pins. After the chassis is inserted into the bracket, the guide sleeves fit onto the guide pins, providing a certain degree of restraint. However, the Class B locking devices do not provide lateral restraint. After prolonged and durable vibration, the guide pins and sleeves are prone to wear, and the chassis may shift laterally, failing to maintain effective and continuous locking within the bracket. This also easily causes wear on the chassis shell. If the rear end of the chassis has connectors that plug into the rear end of the bracket, the connectors may deform under stress, affecting electrical transmission performance.

[0003] The disadvantages of existing chassis and bracket fixing devices are summarized as follows;

[0004] ① Under vibration conditions, the chassis is usually locked only by the locking device at the front end. For locking devices such as Class B locking devices, there is no limit to the left and right direction of chassis 1. After chassis 1 has been subjected to long-term durable vibration, the front end of the chassis moves in the left and right direction. The guide pin repeatedly disengages from the guide sleeve, which can easily cause wear on the guide pin and guide sleeve, making it impossible to achieve continuous and effective locking of chassis 1. If the chassis cannot be effectively and continuously locked in the bracket, the outer shell of the chassis is also prone to wear. Over time, this may wear down the chassis shell and reduce the chassis's environmental resistance and even mechanical properties.

[0005] ② Under vibration conditions, the connection is usually locked only by the locking device at the front of the chassis. When the rear of the chassis has a pluggable connector, the chassis may swing left and right due to vibration, which may cause the connector to deform under stress and affect the electrical transmission performance of the connector. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a high vibration-resistant chassis fixing device.

[0007] The purpose of this utility model is achieved by the following technical solution. A high vibration-resistant chassis fixing device according to this utility model includes a chassis with a locking device at the front end, a bracket with a locking device, and a guide sleeve at the rear end of the chassis for engaging with a guide pin on the bracket. The front end of the chassis has a first hole structure, and the bracket has a second hole structure. After the chassis is inserted into the bracket, the holes on the first hole structure and the second hole structure can overlap in the insertion direction and can be detachably connected by screws or bolts.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0009] In a vibrating environment, fixing the front end of the chassis to the front end of the bracket through a hole structure can limit the left and right swing of the front end of the chassis on the bracket, avoid wear caused by repeated disengagement and engagement of the guide sleeve and guide pin, and prevent wear caused by friction between the chassis shell and the base plate of the bracket. This maintains the environmental resistance and mechanical properties of the chassis and achieves continuous and effective locking between the chassis and the bracket. When the rear end of the chassis has a connection to the bracket, the above continuous and effective locking avoids lateral forces on the connector, prevents the connector from being deformed by force, and avoids affecting the electrical performance of the connector.

[0010] Furthermore, the first hole structure is an ear piece located at the bottom of the front face of the chassis and extending downwards. The ear piece has an ear piece through hole. The ear piece is integrally formed with the chassis or detachably connected. Screws or bolts are used to pass through the ear piece through hole and the hole on the second hole structure.

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

[0012] The earplate structure is simple and easy to process. When the earplate is detachable, it can be used to improve existing chassis.

[0013] Furthermore, two or more lugs are horizontally distributed on the bottom front face of the chassis in a direction perpendicular to the insertion direction.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] Strengthen the left and right direction limits of the chassis to further prevent it from moving around.

[0016] Furthermore, the second hole structure is a fixed angle engagement assembly, which is located at the bottom of the front end of the bracket. The fixed angle engagement assembly includes a nut, screw, or bolt that floats in a direction perpendicular to the insertion direction, passes through the hole in the first hole structure, and is screwed into the nut.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] After the chassis is installed on the bracket, if there are machining or installation errors between the chassis and the bracket, the chassis and the bracket can still be fixed by using the floating of the nut in the limiting hole.

[0019] Furthermore, the fixed angle engagement assembly includes an angle engagement plate and a movable support plate nut. The angle engagement plate includes an angle engagement plate and a nut mounting plate that are perpendicular to each other. The angle engagement plate is disposed on the bottom surface of the bracket. The movable support plate nut is installed on the rear side of the nut mounting plate. The movable support plate nut includes a nut. The nut mounting plate is provided with an angle engagement through hole corresponding to the threaded hole of the nut. The diameter of the angle engagement through hole is larger than the inner diameter of the nut to avoid blocking the threaded hole when the nut floats.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] Installing the floating support plate nut onto the bracket by using an angle engagement method can increase the connection strength and prevent damage in a vibrating environment.

[0022] Furthermore, the movable support plate nut includes a base plate and a nut. The base plate is disposed on the rear side of the nut mounting plate. One end of the nut is provided with a base plate, and the base plate is provided with a base plate through hole communicating with the nut thread hole. Limiting plates are respectively provided on both sides of the base plate. The root of the limiting plate extends perpendicularly from the edge of the base plate and bends towards the center of the base plate. The base plate is stuck between the limiting plate and the base plate and has a gap between the limiting plate and the base plate. The nut extends out from the gap between the tops of the two limiting plates. The base plate is provided with a base plate through hole with a diameter larger than the diameter of the nut thread hole to avoid blocking the thread hole when the nut floats.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] The floating support plate nut has a simple structure, is easy to process, and can easily float in the up, down, left, and right directions.

[0025] Furthermore, symmetrical arc-shaped grooves are provided on the opposite sides of the top of the two limiting plates, and the two arc-shaped grooves form limiting holes for the nut to pass through. The inner diameter of the limiting holes is larger than the outer diameter of the nut.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] To prevent the nut from blocking the floating of the substrate, space is left for the nut itself to float.

[0028] Furthermore, the bracket includes a base plate, the left and right sides of which are bent upward to form side plates, a back plate is provided between the rear ends of the two side plates, and a guide pin is provided on the front side of the back plate.

[0029] By cooperating with the locking device, locking mechanism, guide pin, and guide sleeve in the fixing device structure of this application, continuous and effective locking is achieved.

[0030] Furthermore, the rear end of the chassis and the bracket are equipped with mutually pluggable connectors.

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0032] The fixing device of this application can prevent the connector from being deformed by force and affecting the electrical transmission performance.

[0033] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of an embodiment of a high vibration-resistant chassis fixing device of the present invention;

[0035] Figure 2 for Figure 1 Schematic diagram of the mid-section chassis;

[0036] Figure 3 for Figure 1 Schematic diagram of the central bracket;

[0037] Figure 4 for Figure 3 A schematic diagram of the fixed angle assembly;

[0038] Figure 5 This is a schematic diagram of the chassis in Embodiment 2 of the high vibration-resistant chassis fixing device of this utility model.

[0039] [Attached image labels]

[0040] 1-Chassis,

[0041] 11-Locking device,

[0042] 12-ear plates,

[0043] 121 - Ear plate through hole, 122 - Mounting screw

[0044] 2-Bracket,

[0045] 21-Locker,

[0046] 22-Fixed Angle Assembly Component

[0047] 221-Angle Combination,

[0048] 2211 - Mounting through hole, 2212 - Nut mounting plate, 2213 - Angle mounting plate

[0049] 222-Floating slide nut,

[0050] 2221 - Base plate, 2222 - Nut, 2223 - Limiting plate, 2224 - Base plate, 2225 - Limiting hole

[0051] 223-Counterhead rivet,

[0052] 23-Counterhead bolt,

[0053] 24-Salesperson

[0054] 25-base plate,

[0055] 26-Side panel,

[0056] 27-Backplate,

[0057] 3- Mounting bolts. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0059] 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 to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0060] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0061] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0062] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0063] The features and performance of a chassis assembly of the present invention will be further described in detail below with reference to embodiments.

[0064] Embodiment 1 of the high vibration-resistant chassis fixing device of this utility model, as follows: Figures 1 to 4 As shown. The device includes a chassis 1 and a bracket 2.

[0065] In the prior art, locking devices 11 are provided on both sides of the front end face of the chassis 1. In this embodiment, the locking devices 11 are Class B locking devices, and locking devices 21 are provided on both sides of the bottom front end of the bracket 2. After the chassis 1 is pushed into the bracket 2, the locking devices 11 are locked onto the corresponding locking devices 21. At the same time, the rear end of the chassis 1 is provided with a guide sleeve, and the rear end of the bracket 2 is provided with a guide pin 24. After the chassis 1 is inserted into the bracket 2, the guide pin 24 is inserted into the guide sleeve and cooperates with the locking devices 11 and locking devices 21 to lock and fix the chassis 1 onto the bracket 2. The chassis 1 is usually heavy. The locking devices 11, locking devices 21, guide pins 24, and guide sleeves cooperate to limit the chassis 1 in the front-back direction (the insertion direction of the chassis 1) to prevent the chassis 1 from detaching from the bracket 2 in the front-back direction.

[0066] However, the locking device 11 has weak limiting ability for the chassis 1 in the vertical and horizontal directions. After the chassis 1 has been subjected to long-term durable vibration, it moves laterally, causing the guide pin 24 to repeatedly disengage and insert into the guide sleeve. This causes wear on the guide pin 24 and the guide sleeve, making it impossible to achieve continuous and effective locking of the chassis 1. This can easily lead to friction and wear of the chassis 1's shell on the bracket 2, reducing the chassis's environmental resistance and even mechanical properties. If a connector that plugs into the bracket 2 is located at the rear end of the chassis 1, the lateral movement of the chassis 1 will exert a lateral force on the connector, which may cause the connector to deform under stress, affecting electrical transmission performance. Therefore, this utility model improves upon the existing technology to avoid wear on the guide pin 24, guide sleeve, chassis shell, or deformation of the connector, which could prevent the chassis 1 from being continuously and effectively locked or affect electrical transmission performance.

[0067] Based on the existing technology, the bottom of the front face of the chassis 1 is provided with a downwardly extending lug 12. The lug 12 is integrally formed with the front face of the chassis 1. In this embodiment, two lugs 12 are distributed in the left and right directions at the bottom of the front face of the chassis. After cooperating with the bracket 2, the chassis 1 is more effectively limited in the left and right directions, and further prevents it from moving. In other embodiments, one lug 12 or two or more lugs 12 can be provided according to the volume and weight of the chassis.

[0068] The ear piece 12 is provided with an ear piece through hole 121, which facilitates the passage of the mounting bolt 3 and the threaded connection with the bracket 2, so as to realize the locking and fixing of the chassis 1 and the bracket 2.

[0069] The bracket 2 includes a base plate 25, the left and right sides of the base plate 25 are bent upward to form side plates 26, and a back plate 27 is provided between the rear ends of the two side plates 26. A guide pin 24 is provided on the front side of the back plate 27. If a connector is provided on the bracket 2, the connector is provided on the back plate 27.

[0070] A fixing angle assembly 22 is provided on the bottom surface of the front end of the bracket 2 base plate. The number and position of the fixing angle assembly 12 correspond to those of the ear piece 12. After the chassis 1 is inserted into the bracket 2, the ear piece 12 is located directly in front of the fixing angle assembly 22.

[0071] The fixed angle engagement assembly 22 includes an angle engagement 221, a movable support plate nut 222, and a countersunk rivet 223. The angle engagement 221 is an L-shaped plate, and one side of the angle engagement 221 is an angle engagement mounting plate 2213. The angle engagement mounting plate 2213 has a mounting through hole 2211 for mounting the angle engagement 221 to the bottom surface of the bracket 2 base plate with bolts and nuts. In this embodiment, a countersunk bolt 23 is used to pass through the through hole and mounting through hole 2211 on the bracket 2 base plate and screwed into the self-locking nut inside the angle engagement 221 to fix the angle engagement 221 to the bracket 2. Fixing the bracket base plate with the angle engagement 221 increases the connection strength of the fixed angle engagement assembly 22. The other side of the angle joint 221 is a nut mounting plate 2212. The inner side of the nut mounting plate 2212 (the rear side facing the rear end) is fitted with a movable support plate nut 222. The movable support plate nut 222 is mounted on the angle joint 221 by countersunk rivets 223.

[0072] The movable support plate nut 222 includes a base plate 2221 and a nut 2222. The left and right ends of the base plate 2221 are fixed to the corner bracket 221 by countersunk rivets 223. Limiting plates 2223 are provided on the upper and lower sides of the base plate 2221. The root of the limiting plate 2223 extends perpendicularly from the edge of the base plate 2221 and bends towards the center of the base plate 2221, making the cross-sectional shape of the limiting plate 2223 L-shaped. The limiting plates 2223 on the upper and lower sides of the base plate 2221 are symmetrically arranged, forming a limiting cavity with the base plate 2221. One end of the nut 2222 is provided with a base plate 2224. The base plate 2224 has a through hole communicating with the threaded hole of the nut 2222. The base plate 2224 is engaged between the two limiting plates 2223 and the base plate 2221, and the nut 2222 extends out from the gap between the tops of the two limiting plates 2223. There are gaps between the upper and lower edges of the substrate 2224 and the corresponding inner walls of the limiting plate 2223. There are also gaps between the two sides of the substrate 2224 and the base plate 2221 and the limiting plate 2223, allowing for floating in the up, down, left, and right directions. The top opposite sides of the two limiting plates 2223 are provided with symmetrical arc-shaped grooves. The two arc-shaped grooves form limiting holes 2225 for the nut 2222 to pass through. The inner diameter of the limiting hole 2225 is larger than the outer diameter of the nut 2222, allowing the nut 2222 to float in the four directions of up, down, left, and right within the limiting hole 2225.

[0073] The base plate 2221 has a base plate through hole corresponding to the through hole of the base plate. Correspondingly, the nut mounting plate 2212 of the angle bracket 221 has an angle bracket through hole. The mounting bolt 3 can be passed through the angle bracket through hole, the base plate through hole, and the base plate through hole in sequence and then screwed into the nut 2222. After the chassis 1 is inserted into the bracket 2 and locked by the locking device 11, the mounting bolt 3 is passed through the lug through hole 121, the angle bracket through hole, the base plate through hole, and the base plate through hole in sequence and then screwed into the nut 2222. After tightening, in a vibration environment, the fixing angle assembly 22 and the ear piece 12 are fixed together by the mounting bolt 3, fixing the front end of the chassis 1 to the front end of the bracket 2. This can limit the left and right swing of the front end of the chassis 1 on the bracket 2, avoid wear caused by repeated disengagement and engagement of the guide sleeve and guide pin, and avoid wear caused by friction between the chassis 1 and the base plate 25 of the bracket 2. This maintains the environmental resistance and mechanical properties of the chassis 1 and achieves continuous and effective locking between the chassis 1 and the bracket 2. When the rear end of the chassis has a connection to the bracket, the above continuous and effective locking avoids the generation of left and right forces on the connector, avoids the connector from being deformed by force, and avoids affecting the electrical performance of the connector.

[0074] The diameters of the corner through hole and the base plate through hole are greater than the diameter of the base plate through hole and greater than the diameter of the threaded hole of nut 2222. The diameter of the base plate through hole is not less than the diameter of the threaded hole and the axes of the two coincide. The diameter of the base plate through hole is not less than the diameter of the corner through hole and the axes of the two coincide. When nut 2222 floats, the base plate and corner should not block the threaded hole and the base plate through hole. After the chassis 1 is inserted into the bracket 2, if there are machining or installation errors between the chassis 1 and the bracket 2, the nut 2222 can float within the limiting hole 2225. The mounting bolt 3 can still be used to pass through the lug through hole 121, the angle engagement through hole, the base plate through hole, and the base plate through hole in sequence and screw into the nut 2222. The lug 12 and the fixed angle engagement assembly 22 are fixed by the nut 2222 and the mounting bolt 3, thereby fixing the front end of the chassis 1 to the front end of the bracket 2. This cooperates with the rear guide sleeve and / or connector to avoid wear of the guide pin and guide sleeve caused by chassis displacement under vibration environment, and also avoids affecting the electrical performance of the connector.

[0075] When processing the movable pallet nut 222, after drilling holes in the base plate 2221, the nut 2222 with a base plate 2224 is placed against one side of the base plate 2221, and the base plate through hole on the base plate 2224 is aligned with the base plate through hole on the base plate 2221. Then, the limiting plate 2223 is bent to limit the nut 2222 to float between the limiting plate 2223 and the base plate 2221. The nut 2222 and the base plate 2221 are then installed to form the movable pallet nut 222, and finally, the movable pallet nut 222 is fixed to the corner bracket 221 with rivets. When bending the limiting plate 2223, the gap between the arc-shaped groove at the top of the limiting plate 2223 and the nut 2222 is limited, thereby controlling the floating range. This movable pallet nut 222 has the advantages of simple structure and low processing cost.

[0076] The lugs 12 of the chassis 1 are detachably connected and fixed to the fixing angle assembly 22 on the bracket 2 by bolts / screws, and are locked by the locking device 11 of the chassis 1 and the locking device 21 of the bracket 2, and cooperate with the guide pin 24 and the guide sleeve to achieve effective fixation and continuous locking of the chassis 1.

[0077] The beneficial effects of this utility model are summarized as follows;

[0078] ① This utility model solves the problem that locking devices such as Class B locking devices do not limit the left and right movement of the chassis 1 and bracket 2. After long-term vibration, the guide pin and guide sleeve are easily worn, the chassis moves around, and it is impossible to lock continuously and effectively. This utility model adds a fixed connection point between the front end of the chassis 1 and the front end of the bracket 2 to prevent the front end of the chassis 1 from moving around in the left and right direction of the bracket 2. It cooperates with the fulcrum where the guide pin and guide sleeve are located to prevent the chassis from moving around as a whole. At the same time, it avoids the wear caused by the guide pin repeatedly disengaging and engaging in the guide sleeve, and avoids wear on the chassis shell.

[0079] ② For chassis with pluggable connectors at the rear, this utility model solves the problem that connectors such as Class B locking devices do not limit the left and right movement of chassis 1 and bracket 2. After long-term vibration, the chassis moves in the left and right direction, causing the pluggable connector to deform under force, which in turn affects the electrical performance transmission. This utility model adds a fixed connection point between the front end of chassis 1 and bracket 2 to prevent the front end of chassis 1 from moving in the left and right direction at the front end of bracket 2, and to prevent the connector from being deformed under force in the left and right direction, thereby avoiding affecting the electrical performance.

[0080] ③ The fixed corner assembly 22 is detachably connected to the bracket 2. It is screwed onto the bracket 2 by countersunk screws 23 and self-locking nuts. This connection method allows for direct modification of the existing bracket as needed, improving the reliability of the chassis locking.

[0081] In the second embodiment of this utility model, as Figure 5 As shown, the lug 12 on the chassis 1 can also be detachably connected to the chassis 1, and the lug 12 is screwed onto the chassis 1 by mounting screws 122. This connection method allows for direct modification of existing chassis as needed, making implementation convenient.

[0082] In other embodiments of this utility model, the fixed corner fitting component 22 can also be integrally set with the bracket 2. Specifically, the corner fitting 221 is integrally set with the base plate of the bracket 2.

[0083] In other embodiments of this utility model, a common corner bracket can also be provided on the bottom surface of the front end of the bracket base plate. The corner bracket can be detachably connected to the bracket 2 or integrally set. The side plate of the corner bracket perpendicular to the base plate has a through hole corresponding to the ear through hole 121. Bolts are used to pass through the ear through hole 121 and the hole on the corner bracket in sequence, and nuts are used to fix the ear 12 and the corner bracket to achieve the fixation of the front end of the chassis and the front end of the bracket.

[0084] In other embodiments of this utility model, the front end of the chassis 1 may be provided with a first hole structure with a through hole. In addition to being an ear piece, the shape of the first hole structure may be a protrusion with a through hole to increase strength. The bracket 2 may be provided with a second hole structure with a through hole. The second hole structure may be a square tube with a through hole. After the chassis 1 is inserted into the bracket 2, the first hole structure is directly in front of the second hole structure. Bolts are used to pass through the through holes of the two through hole structures and nuts are used to fix it. Alternatively, one of the first hole structure and the second hole structure may be provided with a through hole and the other with a threaded hole. Screws are used to pass through the through hole and screw into the threaded hole to achieve fixation.

[0085] In other embodiments of this utility model, improvements are made based on Embodiment 2. The housing of the chassis 1 has through holes. Bolts are used to pass through the through holes on the lugs 12 and the housing. Nuts and bolts are used to connect the lugs 12 and the chassis 1 in a threaded connection inside the chassis, thereby achieving a detachable connection and fixation between the lugs 12 and the chassis 1.

[0086] In other embodiments of this utility model, the movable pallet nut 222 can be replaced with other types of movable pallet nuts.

[0087] In other embodiments of this utility model, the movable support plate nut 222 can be replaced with an ordinary nut. The ordinary nut can be set in a corner with a deep hole. The inner wall of the deep hole has an annular groove. The inner diameter of the annular groove is larger than the outer diameter of the nut. The inner diameter of the deep hole is smaller than the outer diameter of the nut but larger than the inner diameter of the nut, so that the nut can float up, down, left and right in the annular groove without obstructing the threaded hole of the nut.

[0088] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high vibration-resistant chassis fixing device, comprising a chassis (1) with a locking device (11) at the front end, a bracket (2) with a locking device (21), and a guide sleeve at the rear end of the chassis (1) for engaging with a guide pin (24) on the bracket (2), characterized in that: The front end of the chassis (1) is provided with a first hole structure, and the bracket (2) is provided with a second hole structure. After the chassis (1) is inserted into the bracket (2), the holes on the first hole structure and the second hole structure can overlap in the insertion direction and can be detachably connected by screws or bolts.

2. The high vibration-resistant chassis fixing device according to claim 1, characterized in that: The first hole structure is an ear piece (12) located at the bottom of the front end face of the chassis (1) and extending downward. The ear piece (12) is provided with an ear piece through hole (121). The ear piece (12) is integrally formed with the chassis (1) or detachably connected. Screws or bolts are used to pass through the ear piece through hole (121) and the hole on the second hole structure.

3. The high vibration-resistant chassis fixing device according to claim 2, characterized in that: The bottom of the front end face of the chassis (1) has two or more lugs (12) horizontally distributed in a direction perpendicular to the insertion direction.

4. The high vibration-resistant chassis fixing device according to claim 1, characterized in that: The second hole structure is a fixed angle engagement assembly (22), which is located at the bottom of the front end of the bracket (2). The fixed angle engagement assembly (22) includes a nut (2222) that floats in a direction perpendicular to the insertion direction. A screw or bolt passes through the hole in the first hole structure and is screwed into the nut (2222).

5. The high vibration-resistant chassis fixing device according to claim 4, characterized in that: The fixed angle engagement assembly (22) includes an angle engagement (221) and a movable support plate nut (222). The angle engagement (221) includes an angle engagement mounting plate (2213) and a nut mounting plate (2212) that are perpendicular to each other. The angle engagement mounting plate (2213) is disposed on the bottom surface of the bracket. The movable support plate nut (222) is installed on the rear side of the nut mounting plate (2212). The movable support plate nut (222) includes a nut (2222). The nut mounting plate (2212) is provided with an angle engagement through hole corresponding to the threaded hole of the nut (2222). The diameter of the angle engagement through hole is larger than the inner diameter of the nut (2222) to avoid blocking the threaded hole when the nut (2222) floats.

6. The high vibration-resistant chassis fixing device according to claim 5, characterized in that: The movable support plate nut (222) includes a base plate (2221) and a nut (2222). The base plate (2221) is disposed on the rear side of the nut mounting plate (2212). One end of the nut (2222) is provided with a base plate (2224). The base plate (2224) is provided with a base plate through hole communicating with the threaded hole of the nut (2222). Limiting plates (2223) are respectively provided on both sides of the base plate (2221). The root of the limiting plate (2223) extends perpendicularly from the edge of the base plate (2221) to... The base plate (2221) extends and bends toward the center of the base plate (2221). The base plate (2224) is stuck between the limiting plate (2223) and the base plate (2221) and has a gap between the limiting plate (2223) and the base plate (2221). The nut (2222) extends out from the gap between the tops of the two limiting plates (2223). The base plate (2221) is provided with a base plate through hole with a diameter larger than the diameter of the nut thread hole to avoid blocking the thread hole when the nut (2222) floats.

7. A high vibration-resistant chassis fixing device according to claim 6, characterized in that: The two limiting plates (2223) have symmetrical arc-shaped grooves on their opposite sides at the top. The two arc-shaped grooves form a limiting hole (2225) through which the nut (2222) passes. The inner diameter of the limiting hole (2225) is larger than the outer diameter of the nut (2222).

8. The high vibration-resistant chassis fixing device according to claim 1, characterized in that: The bracket (2) includes a base plate (25), the left and right sides of the base plate (25) are bent upward to form side plates (26), a back plate (27) is provided between the rear ends of the two side plates (26), and a guide pin (24) is provided on the front side of the back plate (27).

9. The high vibration-resistant chassis fixing device according to claim 1, characterized in that: The rear end of the chassis (1) and the bracket (2) are equipped with connectors that can be plugged into each other.

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