Installation mechanism and fault diagnosis device for photovoltaic inverter

Abstract

The utility model discloses an installation mechanism and a fault diagnosis device for a photovoltaic inverter, comprising an installation unit, including a shell component, a limit component arranged on the outside of the shell component, a rotating component arranged on the top of the limit component, a retractable line component arranged inside the shell component, a transmission component arranged inside the shell component, and a locking component arranged inside the shell component; the locking component comprises a fixed plate, a roller rotatably connected to the top of the fixed plate, a first return spring fixedly connected to the bottom of the fixed plate, a clamping block fixedly connected to the bottom of the first return spring, and a connecting line arranged on the top of the clamping block; the locking component can limit and fix the limit component to ensure the stability of the limit component during use; after completing the fault diagnosis, the rotating component rotates to drive the retractable line component to rotate to achieve retracting, and at the same time releases the limit of the limit component by the locking component, which is convenient for fixing the detection equipment and improves the safety of the user at high places.

Description

Technical Field

[0001] The invention relates to the technical field of inverter fault diagnosis devices, in particular to a mounting mechanism and a photovoltaic inverter fault diagnosis device. Background Art

[0002] The inverter is a converter that converts DC power (battery, storage battery) into constant frequency and voltage or frequency and voltage alternating current (usually 220V, 50Hz sine wave). It consists of an inverter bridge, control logic and filter circuit.

[0003] When the inverter works outdoors for a long time, it will be affected by the outside world, causing some electronic components inside the inverter to be damaged. At the same time, the inverter needs to undertake the task of current conversion. Long-term work will also damage the electronic components inside the inverter, causing the inverter to fail to work properly. In this way, it is necessary to diagnose the inverter fault. During the maintenance of the inverter, the maintenance equipment needs to be connected to the inverter through the line to detect whether the working state of the inverter is stable. During the maintenance process, the equipment needs to be held by the inspection personnel, which increases the difficulty of the inspection personnel's wiring operation. At the same time, it is not convenient to adjust the length of the line during the maintenance process. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide an installation mechanism and a fault diagnosis device for a photovoltaic inverter, which can fix the detection equipment on the outside of the inverter during the fault diagnosis of the inverter, freeing the user's hands and improving the safety of the user at heights.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: an installation mechanism and a fault diagnosis device for a photovoltaic inverter, which comprises an installation unit, including a housing assembly, a limit assembly arranged outside the housing assembly, a rotating assembly arranged on the top of the limit assembly, a wire retracting assembly arranged inside the housing assembly, a transmission assembly arranged inside the housing assembly, and a locking assembly arranged inside the housing assembly;

[0008] The locking assembly includes a fixed plate, a roller rotatably connected to the top of the fixed plate, a first return spring fixedly connected to the bottom of the fixed plate, a clamping block fixedly connected to the bottom of the first return spring, a connecting line arranged on the top of the clamping block, and a short rack fixedly connected to one end of the connecting line.

[0009] As a preferred solution of the installation mechanism of the present invention, the shell assembly includes an outer shell, a sliding cover connected to the top of the outer shell, an anti-sliding block fixedly connected to the top of the sliding cover, a control button connected to the top of the outer shell, and limit blocks arranged on both sides of the sliding cover.

[0010] As a preferred solution of the installation mechanism of the present invention, the limiting assembly includes a first right-angle plate slidably connected to the shell, a group of second return springs fixedly connected to one end of the first right-angle plate, a second right-angle plate arranged at one end of the second return spring, an anti-slip pad arranged on one side of the first right-angle plate and the second right-angle plate, a rack arranged at the top of the first right-angle plate, and a slot arranged at the top of the first right-angle plate.

[0011] As a preferred solution of the installation mechanism of the present invention, the rotating assembly includes a rotating shaft rotatably connected to the outer shell, a first gear slidably connected to the outer side of the rotating shaft, a hexagonal hole arranged at one end of the rotating shaft, and a second gear fixedly connected to the outer wall of the rotating shaft.

[0012] As a preferred solution of the installation mechanism of the present invention, the wire retracting and releasing assembly includes a wire retracting rod rotatably connected to the inside of the housing, a set of limit plates arranged on the outside of the wire retracting rod, and a slide groove arranged on the outside of the wire retracting rod.

[0013] As a preferred solution of the installation mechanism of the present invention, the transmission assembly includes a rotating rod rotatably connected to the outer shell, a third gear fixedly installed on one end of the rotating rod, a sliding rod arranged in the middle of the third gear, a disc fixedly connected to one end of the rotating rod, and a hexagonal block fixedly connected to one end of the disc.

[0014] As a preferred solution of the installation mechanism of the present invention, one side of the slot is set as an inclined surface, and one side of the bottom of the block is set as an inclined surface, and the inclined surface set on one side of the slot is adapted to the inclined surface set on one side of the bottom of the block.

[0015] As a preferred solution of the mounting mechanism of the present invention, a cavity is provided inside the first gear, the disc is adapted to the cavity, and through holes are provided on both sides of the third gear, which are connected to the cavity.

[0016] As a preferred solution of the installation mechanism of the present invention, the middle part of the third gear is set as a circular through hole structure, the slide groove passes through the wire taking-up rod, the diameter of the slide rod is adapted to the slide groove, a wire taking-up bin is opened on the top of the shell, the wire taking-up rod is rotatably installed inside the wire taking-up bin, and one end of the connecting wire is fixedly installed on the outer wall of the rotating shaft.

[0017] As a preferred solution of the installation mechanism of the present invention, the diagnostic unit includes a fault diagnostic component, which includes a protective shell, a group of wires slidably connected to the protective shell, a probe fixedly connected to one end of the wire, a circuit board arranged inside the protective shell, and a processor arranged inside the protective shell.

[0018] Beneficial effects of the present invention: by setting an installation unit, the present invention installs the shell assembly on the outer casing of the inverter through the limit assembly when performing fault diagnosis on the inverter. The limit assembly drives the wire-reeling assembly to rotate during the movement to achieve the effect of wire-reeling. At the same time, the locking assembly can limit and fix the limit assembly to ensure the stability of the limit assembly during use. After completing the fault diagnosis, the rotating assembly rotates to drive the wire-reeling assembly to rotate to achieve wire-reeling. At the same time, the locking assembly releases the limit on the limit assembly, so that the limit assembly can enter the interior of the shell assembly. This can facilitate the fixation of the detection equipment and improve the safety of users at heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0020] Figure 1 It is a schematic diagram of the overall structure of the installation mechanism.

[0021] Figure 2 It is a schematic diagram of the shell assembly structure of the installation mechanism.

[0022] Figure 3 A cross-sectional view of the housing assembly of the mounting mechanism.

[0023] Figure 4 It is a schematic diagram of the rotating component structure of the installation mechanism.

[0024] Figure 5 A cross-sectional view of the transmission assembly of the mounting mechanism.

[0025] Figure 6 A cross-sectional view of a fault diagnosis component of a fault diagnosis device. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Example 1

[0030] Reference Figure 1~2 , is the first embodiment of the present invention, which provides an installation mechanism and a fault diagnosis device for a photovoltaic inverter, which includes an installation unit 100. When diagnosing a fault on the inverter, the shell component 101 is installed on the shell of the inverter through the limit component 102. The limit component 102 drives the winding and releasing wire component 104 to rotate during the movement to achieve the effect of releasing the wire. At the same time, the locking component 106 can limit and fix the limit component 102 to ensure the stability of the limit component 102 during use. After completing the fault diagnosis, the rotating component 103 rotates to drive the winding and releasing wire component 104 to rotate to achieve winding. At the same time, the locking component 106 releases the limit on the limit component 102, so that the limit component 102 can enter the shell component 101. This can facilitate the fixation of the detection equipment and improve the safety of the user at high places.

[0031] Specifically, the installation unit 100 includes a housing assembly 101, a limiting assembly 102 disposed outside the housing assembly 101, a rotating assembly 103 disposed on the top of the limiting assembly 102, a retracting and releasing assembly 104 disposed inside the housing assembly 101, a transmission assembly 105 disposed inside the housing assembly 101, and a locking assembly 106 disposed inside the housing assembly 101;

[0032] The locking assembly 106 includes a fixed plate 106a, a roller 106b rotatably connected to the top of the fixed plate 106a, a first return spring 106c fixedly connected to the bottom of the fixed plate 106a, a block 106d fixedly connected to the bottom of the first return spring 106c, and a connecting line 106e arranged on the top of the block 106d, and a short rack 106f fixedly connected to one end of the connecting line 106e.

[0033] In summary, the present invention sets an installation unit, and when the inverter is subjected to fault diagnosis, the shell assembly is installed on the outer shell of the inverter through the limit assembly. The limit assembly drives the wire-reeling assembly to rotate during the movement to achieve the effect of wire release. At the same time, the locking assembly can limit and fix the limit assembly to ensure the stability of the limit assembly during use. After the fault diagnosis is completed, the rotating assembly drives the wire-reeling assembly to rotate to achieve wire reeling. At the same time, the locking assembly releases the limit on the limit assembly, so that the limit assembly can enter the interior of the shell assembly. This can facilitate the fixation of the detection equipment and improve the safety of users at high places.

[0034] Example 2

[0035] Reference Figures 1 to 6 , which is the second embodiment of the present invention, and provides an installation mechanism and a fault diagnosis device for a photovoltaic inverter, which includes an installation unit 100. When performing fault diagnosis on the inverter, the shell assembly 101 is installed on the shell of the inverter through the limit assembly 102. The limit assembly 102 drives the winding and releasing assembly 104 to rotate during the movement to achieve the effect of releasing the wire. At the same time, the locking assembly 106 can limit and fix the limit assembly 102 to ensure the stability of the limit assembly 102 during use. After completing the fault diagnosis, the rotating assembly 103 rotates to drive the winding and releasing assembly 104 to rotate to achieve winding. At the same time, the locking assembly 106 releases the limit assembly 102, so that the limit assembly 102 can enter the shell assembly 101. This can facilitate the fixation of the detection equipment and improve the safety of the user at high places.

[0036] Specifically, the installation unit 100 includes a housing assembly 101, a limiting assembly 102 disposed outside the housing assembly 101, a rotating assembly 103 disposed on the top of the limiting assembly 102, a retracting and releasing assembly 104 disposed inside the housing assembly 101, a transmission assembly 105 disposed inside the housing assembly 101, and a locking assembly 106 disposed inside the housing assembly 101;

[0037] The locking assembly 106 includes a fixed plate 106a, a roller 106b rotatably connected to the top of the fixed plate 106a, a first return spring 106c fixedly connected to the bottom of the fixed plate 106a, a block 106d fixedly connected to the bottom of the first return spring 106c, and a connecting line 106e arranged on the top of the block 106d, and a short rack 106f fixedly connected to one end of the connecting line 106e.

[0038] Furthermore, the shell assembly 101 includes a shell 101a, a sliding cover 101b connected to the top of the shell 101a, an anti-sliding block 101c fixedly connected to the top of the sliding cover 101b, a control button 101e connected to the top of the shell 101a, and limit blocks 101f arranged on both sides of the sliding cover 101b.

[0039] Furthermore, the limiting assembly 102 includes a first right-angle plate slidably connected to the housing 101a, a group of second return springs 102b fixedly connected to one end of the first right-angle plate 102a, a second right-angle plate 102c arranged at one end of the second return spring 102b, an anti-slip pad 102d arranged on one side of the first right-angle plate 102a and the second right-angle plate 102c, a rack 102e arranged at the top of the first right-angle plate 102a, and a slot 102f arranged at the top of the first right-angle plate 102a.

[0040] Preferably, when diagnosing a fault of an inverter installed at a high place, the user presses the anti-sliding block 101c and pushes the anti-sliding block 101c to one side at the same time, and the anti-sliding block 101c drives the sliding cover 101b to move to one side, and the two sides pull the first right-angle plate 102a and the second right-angle plate 102c to move in the directions away from the housing 101a on both sides at the same time, and the card block 106d moves downward under the action of the first return spring 106c, and the card block 106d is embedded in the card slot 102f opened on the top of the first right-angle plate 102a. The first right-angle plate 102a is limited and fixed, and at the same time, the first right-angle plate 102a drives the rack 102e to move. The movement of the rack 102e drives the third gear 105b to rotate through meshing. The third gear 105b drives the slide bar 105c to rotate. The slide bar 105c drives the take-up rod 104a to rotate. The rotation of the take-up rod 104a realizes the line release operation of the line wound on the outside of the take-up rod 104a. The adjusted housing 101a is further installed on the outside of the inverter, and the operator performs fault diagnosis on the inverter.

[0041] Furthermore, the rotating assembly 103 includes a rotating shaft 103a rotatably connected to the housing 101a, a first gear 103b slidably connected to the outer side of the rotating shaft 103a, a hexagonal hole 103c arranged at one end of the rotating shaft 103a, and a second gear 103d fixedly connected to the outer wall of the rotating shaft 103a.

[0042] Furthermore, the wire take-up assembly 104 includes a wire take-up rod 104a rotatably connected to the inside of the housing 101a, a group of limit plates 104b arranged on the outside of the wire take-up rod 104a, and a slide groove 104c arranged on the outside of the wire take-up rod 104a.

[0043] It should be noted that a sliding groove adapted to the short rack 106f is provided inside the housing 101a for the short rack 106f to slide, and the length of the sliding groove is greater than the length of the short rack 106f. The short rack 106f is meshed and connected with the second gear 103d. When the short rack 106f moves a certain distance, it disengages from the second gear 103d, releasing the meshing state, so that the rotating shaft 103a can continue to rotate. At the same time, due to the obstruction of the second gear 103d, the short rack 106f will not reset, and the block 106d will not be embedded in the slot 102f under the action of the first reset spring 106c. At the same time, the length of the connecting line 106e will not affect the winding of the winding rod 104a.

[0044] Furthermore, the transmission assembly 105 includes a rotating rod 105a rotatably connected to the housing 101a, a third gear 105b fixedly mounted on one end of the rotating rod 105a, a sliding rod 105c arranged in the middle of the third gear 105b, a disc 105d fixedly connected to one end of the rotating rod 105a, and a hexagonal block 105e fixedly connected to one end of the disc 105d.

[0045] Preferably, when the detection is completed, the first gear 103b is moved to one side, the first gear 103b drives the rotating rod 105a to move to one side, and the rotating rod 105a drives the third gear 105b to move to one side when moving to one side, the rotating rod 105a drives the disk 105d to move to one side, and the disk 105d drives the hexagonal block 105e to move to one side, so that the hexagonal block 105e is embedded in the hexagonal hole 103c, and the first gear 103b is further rotated, the first gear 103b drives the rotating shaft 103a to rotate, the rotating shaft 103a drives the hexagonal block 105e embedded in the interior to rotate, the hexagonal block 105e drives the disk 105d to rotate, and the disk 105d drives the rotating rod 105a to rotate. The rotating rod 105a drives the third gear 105b to rotate, and the third gear 105b drives the wire-winding rod 104a to rotate to realize the function of winding the wire. At the same time, the rotating shaft 103a drives the connecting wire 106e installed on the outer wall to rotate, so that the connecting wire 106e is wound around the outer wall of the rotating shaft 103a. After the connecting wire 106e is wound, it pulls the clamping block 106d to move upward. In the process of moving upward, the clamping block 106d squeezes the first reset spring 106c, so that the clamping block 106d is disengaged from the clamping slot 102f, and the housing 101a is further removed from the outside of the inverter. Under the action of the second reset spring 102b, the first right-angle plate 102a and the second right-angle plate 102c are automatically reset to complete the disassembly.

[0046] Furthermore, one side of the card slot 102f is set as an inclined surface, and one side of the bottom of the card block 106d is set as an inclined surface. The inclined surface set on one side of the card slot 102f is adapted to the inclined surface set on one side of the bottom of the card block 106d.

[0047] Furthermore, a cavity is provided inside the first gear 103b, and the disc 105d is adapted to the cavity. Through holes are provided on both sides of the third gear 105b, and the through holes are connected to the cavity.

[0048] Furthermore, a circular through hole structure is arranged in the middle of the third gear 105b, the slide groove 104c passes through the wire-taking rod 104a, the diameter of the slide rod 105c is adapted to the slide groove 104c, a wire-taking bin is provided on the top of the housing 101a, the wire-taking rod 104a is rotatably installed inside the wire-taking bin, and one end of the connecting wire 106e is fixedly installed on the outer wall of the rotating shaft 103a.

[0049] Furthermore, the diagnostic unit 200 includes a fault diagnostic component 201, which includes a protective shell 201a, a group of wires 201b slidably connected to the protective shell 201a, a probe 201c fixedly connected to one end of the wire 201b, a circuit board 201d arranged inside the protective shell 201a, and a processor 201e arranged inside the protective shell 201a.

[0050] It should be noted that a through hole is provided on one side of the first gear 103b, a group of limit blocks are installed inside the through hole, a group of slide grooves are provided on the outer wall of the rotating shaft 103a, the limit blocks are slidably installed inside the slide grooves, a circular cavity disk 105d is provided inside the first gear 103b and is rotatably installed inside the cavity, and the circuit board 201d and the processor 201e are connected using existing circuit connection technology.

[0051] When in use, when diagnosing a fault on an inverter installed at a high place, the user presses the anti-sliding block 101c and pushes the anti-sliding block 101c to one side at the same time. The anti-sliding block 101c drives the sliding cover 101b to move to one side, and the two sides pull the first right-angle plate 102a and the second right-angle plate 102c to move in the directions away from the housing 101a on both sides at the same time. At the same time, the card block 106d moves downward under the action of the first return spring 106c, and the card block 106d is embedded in the card slot 102f opened on the top of the first right-angle plate 102a. The first right-angle plate 102a is limited and fixed, and at the same time, the first right-angle plate 102a drives the rack 102e to move. The movement of the rack 102e drives the third gear 105b to rotate through meshing. The third gear 105b drives the slide bar 105c to rotate. The slide bar 105c drives the take-up rod 104a to rotate. The rotation of the take-up rod 104a realizes the line release operation of the line wound on the outside of the take-up rod 104a. The adjusted housing 101a is further installed on the outside of the inverter, and the operator performs fault diagnosis on the inverter.

[0052] When the detection is completed, the first gear 103b is moved to one side, the first gear 103b drives the rotating rod 105a to move to one side, and the rotating rod 105a drives the third gear 105b to move to one side, the rotating rod 105a drives the disk 105d to move to one side, and the disk 105d drives the hexagonal block 105e to move to one side, so that the hexagonal block 105e is embedded in the hexagonal hole 103c, and the first gear 103b is further rotated, the first gear 103b drives the rotating shaft 103a to rotate, the rotating shaft 103a drives the hexagonal block 105e embedded in the interior to rotate, the hexagonal block 105e drives the disk 105d to rotate, the disk 105d drives the rotating rod 105a to rotate, and the rotating rod 105a drives the rotating shaft 103a to rotate. 05a drives the third gear 105b to rotate, and the third gear 105b drives the take-up rod 104a to rotate to realize the function of taking up the wire. At the same time, the rotating shaft 103a drives the connecting wire 106e installed on the outer wall to rotate, so that the connecting wire 106e is wound around the outer wall of the rotating shaft 103a. After the connecting wire 106e is wound, it pulls the block 106d to move upward. In the process of moving upward, the block 106d squeezes the first reset spring 106c, so that the block 106d is disengaged from the slot 102f, and the housing 101a is further removed from the outside of the inverter. Under the action of the second reset spring 102b, the first right-angle plate 102a and the second right-angle plate 102c are automatically reset to complete the disassembly.

[0053] In summary, the present invention sets an installation unit, and when the inverter is subjected to fault diagnosis, the shell assembly is installed on the outer shell of the inverter through the limit assembly. The limit assembly drives the wire-reeling assembly to rotate during the movement to achieve the effect of wire release. At the same time, the locking assembly can limit and fix the limit assembly to ensure the stability of the limit assembly during use. After the fault diagnosis is completed, the rotating assembly drives the wire-reeling assembly to rotate to achieve wire reeling. At the same time, the locking assembly releases the limit on the limit assembly, so that the limit assembly can enter the interior of the shell assembly. This can facilitate the fixation of the detection equipment and improve the safety of users at high places.

[0054] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0055] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0056] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A mounting mechanism, characterized in that: include, The mounting unit (100) comprises a housing assembly (101), a limiting assembly (102) arranged outside the housing assembly (101), a rotating assembly (103) arranged on the top of the limiting assembly (102), a wire retracting and releasing assembly (104) arranged inside the housing assembly (101), a transmission assembly (105) arranged inside the housing assembly (101), and a locking assembly (106) arranged inside the housing assembly (101); The locking assembly (106) includes a fixed plate (106a), a roller (106b) rotatably connected to the top of the fixed plate (106a), a first return spring (106c) fixedly connected to the bottom of the fixed plate (106a), a clamping block (106d) fixedly connected to the bottom of the first return spring (106c), a connecting line (106e) arranged on the top of the clamping block (106d), and a short rack (106f) fixedly connected to one end of the connecting line (106e).

2. The mounting mechanism according to claim 1, characterized in that: The housing assembly (101) comprises a shell (101a), a sliding cover (101b) retractably connected to the top of the shell (101a), an anti-sliding block (101c) fixedly connected to the top of the sliding cover (101b), a control button (101e) retractably connected to the top of the shell (101a), and limit blocks (101f) arranged on both sides of the sliding cover (101b).

3. The mounting mechanism according to claim 2, characterized in that: The limiting assembly (102) comprises a first right-angle plate (102a) slidably connected to the housing (101a), a group of second return springs (102b) fixedly connected to one end of the first right-angle plate (102a), a second right-angle plate (102c) arranged at one end of the second return spring (102b), an anti-slip pad (102d) arranged on one side of the first right-angle plate (102a) and the second right-angle plate (102c), a rack (102e) arranged at the top of the first right-angle plate (102a), and a slot (102f) arranged at the top of the first right-angle plate (102a).

4. The mounting mechanism according to claim 3, characterized in that: The rotating assembly (103) comprises a rotating shaft (103a) rotatably connected to the housing (101a), a first gear (103b) slidably connected to the outer side of the rotating shaft (103a), a hexagonal hole (103c) provided at one end of the rotating shaft (103a), and a second gear (103d) fixedly connected to the outer wall of the rotating shaft (103a).

5. The mounting mechanism according to claim 4, characterized in that: The wire retracting and releasing assembly (104) comprises a wire retracting rod (104a) rotatably connected to the inside of the housing (101a), a group of limiting plates (104b) arranged on the outside of the wire retracting rod (104a), and a sliding groove (104c) arranged on the outside of the wire retracting rod (104a).

6. The mounting mechanism according to claim 5, characterized in that: The transmission assembly (105) comprises a rotating rod (105a) rotatably connected to the housing (101a), a third gear (105b) fixedly mounted to one end of the rotating rod (105a), a sliding rod (105c) disposed in the middle of the third gear (105b), a disc (105d) fixedly connected to one end of the rotating rod (105a), and a hexagonal block (105e) fixedly connected to one end of the disc (105d).

7. The mounting mechanism according to claim 6, characterized in that: One side of the card slot (102f) is arranged as an inclined surface, and one side of the bottom of the card block (106d) is arranged as an inclined surface. The inclined surface arranged on one side of the card slot (102f) is adapted to the inclined surface arranged on one side of the bottom of the card block (106d).

8. The mounting mechanism according to claim 7, characterized in that: A cavity is provided inside the first gear (103b), the disc (105d) is adapted to the cavity, and through holes are provided on both sides of the third gear (105b), the through holes being in communication with the cavity.

9. The mounting mechanism according to claim 7 or 8, characterized in that: The middle part of the third gear (105b) is set as a circular through hole structure, the slide groove (104c) passes through the wire take-up rod (104a), the diameter of the slide rod (105c) is adapted to the slide groove (104c), a wire take-up bin is opened on the top of the housing (101a), the wire take-up rod (104a) is rotatably installed inside the wire take-up bin, and one end of the connecting wire (106e) is fixedly installed on the outer wall of the rotating shaft (103a).

10. A fault diagnosis device, characterized in that: It comprises the installation mechanism described in any one of claims 1 to 9; and a diagnostic unit (200), comprising a fault diagnosis component (201), the fault diagnosis component (201) comprising a protective shell (201a), a group of wires (201b) slidably connected to the protective shell (201a), a probe (201c) fixedly connected to one end of the wire (201b), a circuit board (201d) arranged inside the protective shell (201a), and a processor (201e) arranged inside the protective shell (201a).

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