Portable electric energy quality analysis monitor

Abstract

The utility model relates to the technical field of electric energy quality analysis monitors, in particular to a portable electric energy quality analysis monitor which comprises an electric energy quality analysis meter body and a portable box, a lifting mechanism is arranged between the electric energy quality analysis meter body and the portable box, and moving wheels and a brake assembly are installed at the bottom of the portable box. A transmission assembly is arranged between the brake assembly and the lifting mechanism, the lifting mechanism can be switched between two different use states under the transmission action of the transmission assembly, when the lifting mechanism lifts the electric energy quality analyzer body to enable the electric energy quality analyzer body to extend out of the outer side of the portable box, the first use state is achieved, and when the electric energy quality analyzer body is recycled into the portable box, the second use state is achieved. In a second use state. The utility model aims to solve the technical problem that after the electric energy quality analyzer body is lifted, the universal wheels need to be locked by the wheel brakes to fix the position of the electric energy quality analyzer body, so that the operation is inconvenient.

Description

Technical Field

[0001] The utility model relates to the technical field of power quality analysis and monitoring instruments, in particular to a portable power quality analysis and monitoring instrument. Background Art

[0002] A power quality analyzer is a portable device designed to monitor and analyze power grid operation quality. It provides harmonic analysis and power quality analysis during power operation, enabling long-term data collection and monitoring of grid operations. It also comes with power quality data analysis software for performing various analyses on the measurement data uploaded to a computer. A power quality analyzer primarily consists of five components: a measurement conversion module, an analog-to-digital conversion module, a data processing module, a data management module, and peripheral modules.

[0003] Most existing power quality analyzers are portable and heavy, and are generally not portable and are not easy to adjust to an appropriate height for use, which affects the use effect.

[0004] In order to solve the above problems, a Chinese utility model (publication number: CN221174766U) discloses a portable power quality analyzer, including a portable case, wherein the interior of the portable case is provided with a power quality analyzer body through an adjustment component, and the bottom end of the portable case is provided with a portable component, and the portable component includes a rectangular groove, which is opened in the middle of the bottom end of the portable case, and two U-shaped support legs are hingedly connected to the interior of the rectangular groove through a first hinge, and the bottom end of the portable case is provided with a universal wheel with a wheel brake.

[0005] During use of the above device, after the power quality analyzer body is raised or lowered by adjusting the assembly, the universal wheel needs to be locked by the wheel brake to fix the position of the power quality analyzer body, which is inconvenient to operate. Utility Model Content

[0006] In view of this, the purpose of the present invention is to provide a portable power quality analysis and monitoring instrument to solve the technical problem that after the adjustment component raises and lowers the power quality analyzer body, the universal wheel needs to be locked by the wheel brake to fix the position of the power quality analyzer body, which causes inconvenience in operation.

[0007] The utility model is achieved through the following technical solutions:

[0008] A portable power quality analyzer and monitor includes a power quality analyzer body and a portable case for placing the power quality analyzer body. A lifting mechanism is provided between the power quality analyzer body and the portable case for driving the power quality analyzer body to move up and down within the portable case. Moving wheels are installed at the bottom of the portable case. A brake assembly is provided at the bottom of the portable case for locking the moving wheels. A transmission assembly is provided between the brake assembly and the lifting mechanism. The lifting mechanism, under the transmission action of the transmission assembly, can switch the power quality analyzer body between two different usage states.

[0009] When the lifting mechanism lifts the power quality analyzer body so that it extends out of the portable case, the brake assembly rests on the moving wheels to lock the moving wheels. At this time, the power quality analyzer body is in the first usage state. When the power quality analyzer body is retracted into the portable case, the brake assembly disengages from the moving wheels to unlock the moving wheels. At this time, the power quality analyzer body is in the second usage state.

[0010] Furthermore, the brake assembly includes a brake rod arranged at the bottom of the portable case, a brake pad connected to the brake rod for locking the wheel surface of the moving wheel, and an elastic reset structure arranged between the brake rod and the bottom of the portable case and used to reset the brake rod.

[0011] Furthermore, the lifting mechanism includes a plurality of connecting rod lifting components, a connecting rod for connecting the plurality of connecting rod lifting components, and a screw rod for driving the connecting rod to move horizontally;

[0012] Among them, there are two connecting rods, and both of the connecting rods are slidably matched with the portable box in the horizontal direction. The connecting rod lifting component includes two cross-arranged first support rods and second support rods. One end of each of the first support rods and the second support rods is hinged to the power quality analyzer body, and the other end is hinged to the two connecting rods respectively. The two connecting rods are threadedly connected to the screw rod, and the screw threads have opposite directions. By rotating the screw rod, the two connecting rods are driven to move horizontally in opposite directions, thereby causing the first support rod and the second support rod to be displaced in the vertical direction.

[0013] Furthermore, the lifting mechanism includes a plurality of connecting rod lifting components, a connecting rod for connecting the plurality of connecting rod lifting components, and a screw rod for driving the connecting rod to move horizontally;

[0014] Among them, there is one connecting rod, and the connecting rods are all slidably matched with the portable box in the horizontal direction. The connecting rod lifting component includes two cross-arranged first support rods and a second support rod. One end of multiple first support rods and second support rods is hinged to the power quality analyzer body, and the other end of multiple first support rods is hinged on the portable box, and the other end of multiple second support rods is hinged on the connecting rod. The connecting rod is threadedly connected with the screw rod, and a notch is provided on the side wall of the portable box for allowing the power quality analyzer body to pass through. By rotating the screw rod, the connecting rod is driven to move in the horizontal direction, thereby causing the first support rod and the second support rod to be displaced in the vertical direction.

[0015] Furthermore, the transmission assembly includes a long pressure rod and a transmission rod arranged between the pressure rod and the brake rod;

[0016] The pressure rod is slidably engaged with the portable case along the vertical direction, and the end of the pressure rod has an inclined surface that cooperates with the connecting rod. The inclined surface is inclined laterally toward the middle of the pressure rod, and the two ends of the transmission rod are respectively connected to the pressure rod and the brake rod;

[0017] The connecting rod squeezes the inclined surface during movement, pushing the pressure rod to slide downward, and the brake rod moves downward under the transmission action of the transmission rod. When the connecting rod rests against the upper end of the transmission rod, the power quality analyzer body is in the first usage state. When the connecting rod is not in contact with the pressure rod, the power quality analyzer body is in the second usage state.

[0018] Furthermore, the transmission assembly includes a transmission block provided on the power quality analyzer body, a slider provided at the lower portion of the portable case and slidably engaged with the portable case, and a transmission rope provided between the slider and the brake lever;

[0019] The portable case is provided with a steering component, one end of the transmission rope is connected to the brake lever, and the other end is wound around the steering component and connected to the slider after being turned by the steering component;

[0020] When the transmission block is not in contact with the slider, the brake pad is in contact with the wheel surface of the moving wheel under the action of the elastic reset structure. At this time, the power quality analyzer body is in the first usage state. During the downward movement of the transmission block, the slider is synchronously squeezed to slide downward, and then the brake rod is pulled upward under the transmission action of the transmission rope. Finally, when the brake pad is disengaged from the moving wheel, the power quality analyzer body is in the second usage state.

[0021] The beneficial effects of the present invention are:

[0022] This portable power quality analyzer and monitor synchronizes the movement of the lifting mechanism with the action of the brake assembly. When the power quality analyzer body is lifted to the outside of the portable case, the brake assembly locks the moving wheels, eliminating the need for manually operating the wheel brake to lock the moving wheels, making operation easier. When the analyzer is returned to the portable case, the brake assembly automatically unlocks the moving wheels, eliminating the need for manually operating the wheel brake to unlock the moving wheels, also making operation easier.

[0023] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of the first embodiment of the present invention Figure 2 ;

[0026] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure;

[0027] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of the second embodiment of the present invention Figure 1 ;

[0029] Figure 6 This is a schematic diagram of the structure of the second embodiment of the present invention Figure 2 ;

[0030] Figure 7 This is a schematic diagram of the structure of the third embodiment of the present invention Figure 1 ;

[0031] Figure 8 This is a schematic diagram of the structure of the third embodiment of the present invention Figure 2 ;

[0032] Figure 9 for Figure 8 Schematic diagram of the cross-sectional structure;

[0033] Figure 10 for Figure 9 Schematic diagram of the enlarged structure at point B in the middle.

[0034] In the figure: power quality analyzer body 1, portable case 2, moving wheel 3, brake lever 4, brake pad 5, elastic reset structure 6, connecting rod 7, screw rod 8, rotating wheel 9, first support rod 10, second support rod 11, notch 12, pressure rod 13, transmission rod 14, inclined surface 15, transmission block 16, slider 17, transmission rope 18, steering component 19, and mounting frame 20. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] 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 rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0038] In the above description of the present invention, it should be noted that the terms "one side" and "the other side" and the like indicate positions or locations based on the positions or locations shown in the accompanying drawings, or the positions or locations in which the product of the present invention is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0039] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted.

[0040] Example 1: Please refer to Figure 1-4The utility model provides a technical solution, a portable power quality analysis and monitoring instrument, comprising a power quality analyzer body 1 and a portable case 2 for placing the power quality analyzer body 1, the portable case 2 is a hollow box structure with an open top, the interior of which constitutes a accommodating chamber for accommodating the power quality analyzer body 1, when the power quality analyzer body 1 is located in the portable case 2, the portable case 2 can protect the power quality analyzer body 1, a lifting mechanism for driving the power quality analyzer body 1 to move up and down in the portable case 2 is provided between the power quality analyzer body 1 and the portable case 2, moving wheels 3 are installed at the bottom of the portable case 2, and a brake assembly for locking the moving wheels 3 is provided at the bottom of the portable case 2, a transmission assembly is provided between the brake assembly and the lifting mechanism, and the lifting mechanism can switch the power quality analyzer body 1 between two different usage states under the transmission action of the transmission assembly;

[0041] When the lifting mechanism lifts the power quality analyzer body 1 so that it extends out of the portable box 2, the brake assembly rests on the moving wheel 3 to lock the moving wheel 3. At this time, the power quality analyzer body 1 is in the first usage state. When the power quality analyzer body 1 is retracted into the portable box 2, the brake assembly disengages from the moving wheel 3 to unlock the moving wheel 3. At this time, the power quality analyzer body 1 is in the second usage state.

[0042] By synchronizing the movement of the lifting mechanism with the action of the brake assembly, when the power quality analyzer body 1 is lifted to the outside of the portable box 2, the brake assembly locks the moving wheel 3, reducing the process of manually operating the wheel brake to lock the moving wheel 3, making the operation easier; when the analyzer is recovered into the portable box 2, the brake assembly will automatically unlock the moving wheel 3, reducing the process of manually operating the wheel brake to unlock the moving wheel 3, also making the operation easier.

[0043] In this embodiment, the brake assembly includes a brake lever 4 arranged at the bottom of the portable case 2, a brake pad 5 connected to the brake lever 4 for locking the wheel surface of the moving wheel 3, and an elastic reset structure 6 arranged between the brake lever 4 and the bottom of the portable case 2 and used to reset the brake lever 4.

[0044] The elastic reset structure 6 may be a spring, an elastic sheet, an elastic rope, etc., and is specifically a spring in this embodiment.

[0045] Specifically, there are four moving wheels 3, which are respectively arranged at the four corners of the bottom of the portable case 2. The hub surface of the moving wheel 3 is parallel to the length direction of the portable case 2. The moving wheel 3 makes the entire equipment easy to carry and move, and is very suitable for use in situations where the test location needs to be changed frequently. The brake lever 4 is arranged between the two moving wheels 3 on one side in the length direction and is arranged along the length direction of the portable case 2. The brake pad 5 is arranged at the end of the brake lever 4. One side of the brake pad 5 is connected to the brake lever 4 as a connecting end, and the other side is used as a braking surface to lock the moving wheel 3 when it contacts the wheel surface of the moving wheel 3.

[0046] A spring is positioned between the brake lever 4 and the bottom of the carrying case 2. One end of the spring is fixedly connected to the bottom of the carrying case 2, and the other end is fixedly connected to the brake lever 4. It should be noted that in the spring's natural position, the brake pad 5 remains separated from the surface of the moving wheel 3. When an external force is applied, the brake lever 4 moves downward, which in turn moves the brake pad 5 downward, causing the braking surface of the brake pad 5 to contact the surface of the moving wheel 3, locking the moving wheel 3. Simultaneously, the spring elastically stretches. Upon removal of the external force, the spring's elastic force returns the brake lever 4 and brake pad 5 to their original positions.

[0047] In this embodiment: the lifting mechanism includes a plurality of connecting rod lifting components, a connecting rod 7 for connecting the plurality of connecting rod lifting components, and a screw rod 8 for driving the connecting rod 7 to move horizontally;

[0048] Among them, there are two connecting rods 7, and the two connecting rods 7 are both slidably matched with the portable box 2 in the horizontal direction. The specific sliding matching structure is: a first sliding groove is opened at the lower part of the two inner side walls in the length direction of the portable box 2, and the two first sliding grooves are arranged along the length direction of the portable box 2. The connecting rod 7 is arranged along the width direction of the portable box 2. The two ends of the two connecting rods 7 are respectively located in the two first sliding grooves and slide with the two first sliding grooves respectively. Push the connecting rod 7, and the end of the connecting rod 7 slides along the first sliding groove, so that the connecting rod 7 can move along the length direction of the portable box 2. The connecting rod lifting part The component includes two cross-arranged first support rods 10 and second support rods 11. One end of each of the first support rods 10 and the second support rods 11 is hinged to the power quality analyzer body 1, and the other end is hinged to the two connecting rods 7. The two connecting rods 7 are threadedly connected to the screw rod 8, and the spiral directions of the threads are opposite. The screw rod 8 is rotatably connected to the portable box 2. The screw rod 8 is arranged along the length direction of the portable box 2. By rotating the screw rod 8, the two connecting rods 7 are driven to move horizontally in opposite directions, thereby causing the first support rod 10 and the second support rod 11 to be displaced in the vertical direction.

[0049] Among them, an installation frame 20 is provided at the bottom of the power quality analyzer body 1. The installation frame 20 is a hollow box structure with an open top. The power quality analyzer body 1 is placed in the installation frame 20 and is fastened with bolts. The ends of the multiple first support rods 10 and second support rods 11 away from the portable box 2 are hinged to the bottom of the installation frame 20.

[0050] Furthermore, one end of the screw rod 8 extends out of the portable box 2 as a rotating part. In order to facilitate the rotation of the screw rod 8, a rotating wheel 9 is set on the rotating part of the screw rod 8. It should be noted that in addition to installing the rotating wheel 9 on the rotating part, a motor can also be installed, and a rotating handle and other components can be used to drive the screw rod 8 to rotate.

[0051] In this embodiment: the transmission assembly includes a long pressure rod 13 and a transmission rod 14 arranged between the pressure rod 13 and the brake rod 4;

[0052] Among them, the pressure rod 13 slides with the portable box 2 in the vertical direction. The specific sliding cooperation structure is as follows: a second slide groove along the length direction of the first slide groove is opened on the side wall of the first slide groove near the bottom of the portable box 2. The pressure rod 13 has the same size as the second slide groove. The pressure rod 13 is located in the second slide groove and can slide along the height direction of the second slide groove. The end of the pressure rod 13 has an inclined surface 15 that cooperates with the connecting rod 7. The upper side of the inclined surface 15 is inclined toward the middle of the pressure rod 13. One end of the transmission rod 14 is connected to the brake rod, and the other end extends upward into the second slide groove and is connected to the pressure rod;

[0053] By squeezing the inclined surface 15 during the movement of the connecting rod 7, the pressure rod 13 is pushed downward, and the brake rod 4 is moved downward under the transmission action of the transmission rod 14. When the connecting rod 7 rests on the upper end of the transmission rod 14, the power quality analyzer body 1 is in the first usage state. When the connecting rod 7 is not in contact with the pressure rod 13, the power quality analyzer body 1 is in the second usage state.

[0054] The specific usage is as follows:

[0055] When the power quality analyzer body 1 is in the first usage state, the power quality analyzer body 1 is extended out of the portable case 2, and the movable wheels 3 are in a locked state. In this state, the power quality analyzer body 1 can be used to perform power analysis. In addition, when the power quality analyzer body 1 is extended out of the portable case 2, the height of the power quality analyzer can also be adjusted according to usage needs. During the height adjustment process, the power quality analyzer body 1 is always in the first usage state.

[0056] When the power quality analyzer body 1 is in the second use state, the power quality analyzer body 1 is located in the portable box 2 and the moving wheels are in an unlocked state. In this state, the power quality analyzer body 1 can be moved to a suitable location.

[0057] When the first usage state is converted into the second usage state, the wheel 9 is rotated, and the wheel 9 drives the screw rod 8 to rotate, and the screw rod 8 simultaneously drives the two connecting rods 7 to move in opposite directions. Due to the hinged relationship between the two connecting rods 7 and the connecting rod lifting component, the horizontal movement of the connecting rod 7 will be converted into the elongation of the connecting rod lifting component, that is, the first support rod 10 and the second support rod 11 overlap in the vertical direction, thereby lifting the power quality analyzer body 1 in the portable box 2 so that it extends out of the portable box 2.

[0058] When the second usage state is converted into the first usage state, the wheel 9 is rotated, and the wheel 9 drives the screw rod 8 to rotate, and the screw rod 8 simultaneously drives the two connecting rods 7 to move in opposite directions. Due to the hinged relationship between the two connecting rods 7 and the connecting rod lifting component, the horizontal movement of the connecting rod 7 will be converted into the shortening of the connecting rod lifting component, that is, the first support rod 10 and the second support rod 11 overlap in the horizontal direction, thereby recovering the power quality analyzer body 1 into the portable box 2.

[0059] Example 2: Please refer to Figure 5-6 The difference between this embodiment and embodiment 1 is that the lifting mechanism includes multiple groups of connecting rod lifting components, a connecting rod 7 for connecting the multiple connecting rod lifting components, and a screw rod 8 for driving the connecting rod 7 to move horizontally;

[0060] Among them, there is one connecting rod 7, and the connecting rod 7 slides with the portable box 2 in the horizontal direction. The specific sliding cooperation structure is consistent with the scheme in Example 1. The connecting rod lifting component includes two cross-arranged first support rods 10 and second support rods 11. One end of multiple first support rods 10 and second support rods 11 is hinged to the power quality analyzer body 1, and the other end of multiple first support rods 10 is hinged on the portable box 2. The other end of multiple second support rods 11 is hinged on the connecting rod 7. The connecting rod 7 is threadedly connected to the screw rod 8. A notch 12 is provided on the side wall of the portable box 2 for the power quality analyzer body 1 to pass through. By rotating the screw rod 8, the connecting rod 7 is driven to move in the horizontal direction, thereby causing the first support rod 10 and the second support rod 11 to be displaced in the vertical direction.

[0061] The main difference between the implementation process of this embodiment and that of Example 1 is that after the screw rod 8 is rotated, only one connecting rod 7 is driven to slide in the horizontal direction, but the extension or shortening of the connecting rod lifting component can also be achieved. The only difference is that the movement trajectory of the power quality analyzer body 1 is converted from the vertical upward movement of Example 1 to an arc-shaped movement with the hinge point of the first support rod 10 and the portable box 2 as the center and the length of the first support rod 10 as the radius. Therefore, during the movement process, the side wall of the portable box 2 close to the first support rod 10 will hinder the movement of the power quality analyzer body 1, and therefore a gap 12 needs to be opened in the side wall of the portable box 2 to allow the power quality analyzer body 1 to pass through.

[0062] Example 3: Please refer to Figure 7-10 , the difference between this embodiment and embodiment 1 or 2 is that the transmission assembly includes a transmission block 16 provided on the power quality analyzer body 1, a slider 17 provided at the lower part of the portable box 2 and slidingly matched with the portable box 2, and a transmission rope 18 provided between the slider 17 and the brake lever 4. Specifically, the transmission block 16 is fixedly connected to the mounting frame 20 located outside the power quality analyzer body 1, and the sliding matching structure of the slider 17 and the portable box 2 is specifically that a third slide groove along the same motion trajectory of the transmission block 16 is provided on the portable box 2, the slider 17 is located in the third slide groove and slides with the third slide groove, the transmission block 16 is also located in the third slide groove and can also slide along the third slide groove, when the transmission block 16 slides to contact with the slider 17 and squeezes the slider 17 downward during further sliding, according to the difference between embodiment 1 and embodiment 2, the motion trajectory of the transmission block 16 is respectively vertical linear motion ( Figure 7-10 Indicated) and an arc motion (not indicated in the figure) with the hinge point of the first support rod 10 and the portable box 2 as the center and the length of the first support rod 10 as the radius.

[0063] The portable case 2 is provided with a steering component 19, one end of the transmission rope 18 is connected to the brake lever 4, and the other end is wound around the steering component 19 and connected to the slider 17 after being turned by the steering component 19;

[0064] When the transmission block 16 is not in contact with the slider 17, the brake pad 5 is in contact with the wheel surface of the moving wheel 3 under the action of the elastic reset structure 6. At this time, the power quality analyzer body 1 is in the first usage state. During the downward movement of the transmission block 16, the slider 17 is synchronously squeezed to slide downward, and then the brake lever 4 is pulled upward under the transmission action of the transmission rope 18. Finally, when the brake pad 5 is out of contact with the moving wheel 3, the power quality analyzer body 1 is in the second usage state.

[0065] Compared with embodiment 1 or 2, the method of using the power quality analyzer in the first use state and the second use state is the same, and the difference lies in the switching between the first use state and the second use state.

[0066] When the first usage state is converted into the second usage state, the wheel 9 is rotated, and the wheel 9 drives the screw rod 8 to rotate, and the screw rod 8 drives the connecting rod 7 to move. The horizontal movement of the connecting rod 7 will be converted into the shortening of the connecting rod lifting component, that is, the first support rod 10 and the second support rod 11 overlap in the horizontal direction, thereby recovering the power quality analyzer body 1 into the portable box 2. During this process, the transmission block 16 moves along the third slide groove to contact the slider 17, and squeezes the slider 17 to move during further movement. Under the action of the transmission rope 18, the slider 17 pulls the brake rod 4 upward to disengage the brake pad 5 from the wheel surface of the moving wheel 3.

[0067] When the second usage state is converted into the first usage state, the wheel 9 is rotated, and the wheel 9 drives the screw rod 8 to rotate, and the screw rod 8 drives the connecting rod 7 to move. The horizontal movement of the connecting rod 7 will be converted into the elongation of the connecting rod lifting component, that is, the first support rod 10 and the second support rod 11 overlap in the vertical direction, thereby lifting the power quality analyzer body 1 in the portable case 2 so that it extends out of the portable case 2. In this process, the transmission block 16 is pulled away from the slider 17 until it loses contact with the slider 17. At the same time, the elastic reset structure 6 elastically recovers so that the brake assembly can re-lock the moving wheel. Synchronously, the slider 17 is pulled back to its original state under the transmission action of the transmission rope 18.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A portable power quality analyzer and monitor, comprising a power quality analyzer body and a portable case for placing the power quality analyzer body, characterized in that: A lifting mechanism is provided between the power quality analyzer body and the portable case for driving the power quality analyzer body to move up and down in the portable case. Moving wheels are installed at the bottom of the portable case. A brake assembly is provided at the bottom of the portable case for locking the moving wheels. A transmission assembly is provided between the brake assembly and the lifting mechanism. The lifting mechanism can switch the power quality analyzer body between two different usage states under the transmission action of the transmission assembly. When the lifting mechanism lifts the power quality analyzer body so that it extends out of the portable case, the brake assembly rests on the moving wheels to lock the moving wheels. At this time, the power quality analyzer body is in the first usage state. When the power quality analyzer body is retracted into the portable case, the brake assembly disengages from the moving wheels to unlock the moving wheels. At this time, the power quality analyzer body is in the second usage state.

2. The portable power quality analysis and monitoring instrument according to claim 1, characterized in that: The brake assembly includes a brake rod arranged at the bottom of the portable case, a brake shoe connected to the brake rod for locking the moving wheel surface, and an elastic reset structure arranged between the brake rod and the bottom of the portable case and used for resetting the brake rod.

3. The portable power quality analysis and monitoring instrument according to claim 2, characterized in that: The lifting mechanism includes multiple groups of connecting rod lifting components, connecting rods for connecting the multiple connecting rod lifting components, and screw rods for driving the connecting rods to move horizontally; Among them, there are two connecting rods, and both of the connecting rods are slidably matched with the portable box in the horizontal direction. The connecting rod lifting component includes two cross-arranged first support rods and second support rods. One end of each of the first support rods and the second support rods is hinged to the power quality analyzer body, and the other end is hinged to the two connecting rods respectively. The two connecting rods are threadedly connected to the screw rod, and the screw threads have opposite directions. By rotating the screw rod, the two connecting rods are driven to move horizontally in opposite directions, thereby causing the first support rod and the second support rod to be displaced in the vertical direction.

4. The portable power quality analysis and monitoring instrument according to claim 2, characterized in that: The lifting mechanism includes multiple groups of connecting rod lifting components, connecting rods for connecting the multiple connecting rod lifting components, and screw rods for driving the connecting rods to move horizontally; Among them, there is one connecting rod, and the connecting rods are all slidably matched with the portable box in the horizontal direction. The connecting rod lifting component includes two cross-arranged first support rods and a second support rod. One end of multiple first support rods and second support rods is hinged to the power quality analyzer body, and the other end of multiple first support rods is hinged on the portable box, and the other end of multiple second support rods is hinged on the connecting rod. The connecting rod is threadedly connected with the screw rod, and a notch is provided on the side wall of the portable box for allowing the power quality analyzer body to pass through. By rotating the screw rod, the connecting rod is driven to move in the horizontal direction, thereby causing the first support rod and the second support rod to be displaced in the vertical direction.

5. A portable power quality analysis and monitoring instrument according to claim 3 or 4, characterized in that: The transmission assembly includes a long pressure rod and a transmission rod arranged between the pressure rod and the brake rod; The pressure rod is slidably engaged with the portable case along the vertical direction, and the end of the pressure rod has an inclined surface that cooperates with the connecting rod. The inclined surface is inclined laterally toward the middle of the pressure rod, and the two ends of the transmission rod are respectively connected to the pressure rod and the brake rod; The connecting rod squeezes the inclined surface during movement, pushing the pressure rod to slide downward, and the brake rod moves downward under the transmission action of the transmission rod. When the connecting rod rests against the upper end of the transmission rod, the power quality analyzer body is in the first usage state. When the connecting rod is not in contact with the pressure rod, the power quality analyzer body is in the second usage state.

6. A portable power quality analysis and monitoring instrument according to claim 3 or 4, characterized in that: The transmission assembly includes a transmission block provided on the power quality analyzer body, a slider provided at the lower portion of the portable case and slidably engaged with the portable case, and a transmission rope provided between the slider and the brake lever; The portable case is provided with a steering component, one end of the transmission rope is connected to the brake lever, and the other end is wound around the steering component and connected to the slider after being turned by the steering component; When the transmission block is not in contact with the slider, the brake pad is in contact with the wheel surface of the moving wheel under the action of the elastic reset structure. At this time, the power quality analyzer body is in the first usage state. During the downward movement of the transmission block, the slider is synchronously squeezed to slide downward, and then the brake rod is pulled upward under the transmission action of the transmission rope. Finally, when the brake pad is disengaged from the moving wheel, the power quality analyzer body is in the second usage state.

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