A portable APF active filter

Abstract

The invention relates to the technical field of filters, and in particular to an APF active filter that is easy to move, comprising: a filter box, both sides of the bottom of the filter box are equipped with overhead legs, and both ends of the inner cavity of the overhead legs are equipped with "X"-shaped frames; a shock-absorbing component is arranged between the two ends of the upper part of the "X"-shaped frame; a V-shaped driving frame is located between two "X"-shaped frames, a folding pin is arranged in the middle of the V-shaped driving frame, and the two ends of the V-shaped driving frame are respectively rotatably connected with the lower ends of the two "X"-shaped frames; the beneficial effect is: by arranging the V-shaped driving frame on the lower side between the two groups of "X"-shaped frames, and a handle bar is arranged on the outer side of the V-shaped driving frame, a staff member moves up and down and drives the V-shaped driving frame to deform by hooking or stepping on the handle bar, which is safer when in use, and the folding or unfolding of the "X"-shaped frame can be operated by the staff member's feet, without bending over for manual operation, which is more convenient and labor-saving when in use.

Description

Technical Field

[0001] The invention relates to the technical field of filters, in particular to an APF active filter which is easy to move. Background Art

[0002] Active power filter (APF) is a new type of power electronic device used to dynamically suppress harmonics and compensate reactive power. It can compensate for harmonics with varying magnitude and frequency as well as varying reactive power.

[0003] A Chinese utility model with announcement number CN219961157U discloses a mobile filter. The device is provided with a moving mechanism. By squeezing a limit block, the limit block squeezes an internal spring sheet, so that the threaded spring pushes the sliding block to slide downward, so that the moving wheel slides out of the interior of the overhead support plate, and the moving wheel supports the ground, so that the filter device body can be moved easily.

[0004] In actual use, since the filter itself has a large weight, the force of the spring is not enough to support the moving wheels on the ground. The filter needs to be manually pushed to tilt, so that the moving wheels can be kept suspended before the moving wheels can be slid out, and then the moving wheels can support the filter. However, in the process of pushing the filter to tilt, the filter is subjected to the horizontal thrust of the staff, which may cause the risk of tipping over. On the other hand, the staff also needs to bend down and manually slide the moving wheels, which is extremely inconvenient to use. To this end, the present invention proposes an APF active filter that is easy to move to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an APF active filter that is easy to move, so as to solve the problem that the mobile structure of the filter proposed in the above background technology is not convenient in use and has certain safety hazards.

[0006] To achieve the above object, the present invention provides the following technical solution: an APF active filter that is easy to move, comprising:

[0007] A filter box, wherein both sides of the bottom of the filter box are equipped with overhead legs, the overhead legs are hollow and have a receiving slot on the lower end surface, and both ends of the inner cavity of the overhead legs are equipped with "X"-shaped frames;

[0008] One upper end of the "X"-shaped frame is rotatably connected to the overhead support leg, a shock-absorbing assembly is arranged between the two ends of the upper portion of the "X"-shaped frame, and both ends of the shock-absorbing assembly are connected to the ends of the "X"-shaped frame, and a rotatable control rod is arranged between the two shock-absorbing assemblies, and the control rod rotates and controls the other upper end of the "X"-shaped frame to separate from one end of the shock-absorbing assembly;

[0009] A V-shaped driving frame is located between two "X"-shaped frames, a folding pin is arranged in the middle of the V-shaped driving frame, two ends of the V-shaped driving frame are rotatably connected with the lower ends of the two "X"-shaped frames respectively, a handle bar is arranged on the outer side of the V-shaped driving frame, and the handle bar drives the V-shaped driving frame to deform and then drives the "X"-shaped frame to deform.

[0010] Preferably, the "X"-shaped frame includes two mutually intersecting support plates, the middle parts of the two support plates are rotatably connected by a pin, the lower ends of the support plates are rotatably mounted with rollers, the upper end of one of the support plates is rotatably connected to the overhead support leg by a pin, and the upper end of the other support plate is provided with a special-shaped shaft.

[0011] Preferably, the middle cross-section of the special-shaped shaft rod is in a "D" shape, one end of the shock absorbing assembly is fixedly connected to a connecting block, an avoidance slide groove is opened in the middle of the connecting block, and the special-shaped shaft rod is movably connected to the avoidance slide groove, and support blocks are movably inserted into the upper and lower sides of the inner cavity of one end of the avoidance slide groove, the special-shaped shaft rod is located at one end of the avoidance slide groove and is blocked by the support block, and a grooved slide rail corresponding to the special-shaped shaft rod is fixed to the inner wall of the overhead support leg, and one end of the special-shaped shaft rod is movably inserted into the inner cavity of the grooved slide rail and slides along its length direction.

[0012] Preferably, an oblique cut is provided on the side of the support block away from the special-shaped shaft rod, and a return spring is provided at the ends of the two support blocks away from each other. A vertical frame is provided on the outer side of the return spring, and the vertical frame is fixed to the surface of the connecting block. A connecting frame is provided between the two connecting blocks, and the two ends of the connecting frame are respectively fixedly connected to the two support blocks in symmetrical positions.

[0013] Preferably, a boss is fixedly connected to the middle of the connecting frame, and a groove is provided on one side of the two bosses close to each other, a control rod is arranged between the two bosses, a push block is fixedly connected to one end of the control rod, and the cross-section of the push block is elliptical, a knob is fixedly connected to the other end of the control rod, and an extension frame is fixed to the surface of the knob, a mounting through hole is penetrated through the inner wall of the overhead support leg for the control rod to pass through, and a limiting protrusion is provided at the open end of the mounting through hole, a ring is fixed to the outer side of the control rod, a limiting notch is provided on the surface of the ring, and the limiting protrusion corresponds to the limiting notch, and the central angle of the limiting notch is ninety degrees.

[0014] Preferably, the other end of the shock absorbing assembly is fixedly connected with a connecting sleeve, and the connecting sleeve is arranged on a pin shaft at an upper end of the "X"-shaped frame. The shock absorbing assembly includes a sealing sleeve and a telescopic shaft rod movably inserted in the inner cavity of the sealing sleeve, the inner cavity of the sealing sleeve is provided with a sealing plug and fixedly connected to the end of the telescopic shaft rod, a receiving slot hole is opened inside the telescopic shaft rod, a damping hole is opened in the middle of the sealing plug and connects the receiving slot hole and the inner cavity of the sealing sleeve, and the inner cavity of the sealing sleeve is filled with hydraulic oil and a buffer spring is placed therein.

[0015] Preferably, a guide vertical groove is formed through the inner wall of the overhead support leg, the handle rod is movably connected to the guide vertical groove, a rubber block is bonded and fixed to the upper half of the inner cavity of the guide vertical groove, a notch groove is formed in the middle of the rubber block, and rounded corners are provided at the corners of the rubber block.

[0016] Preferably, a baffle rod is provided below one end of the handle rod, and the handle rod and the baffle rod are respectively located on the upper and lower sides of the V-shaped drive frame, a connecting plate is fixedly connected between the baffle rod and the handle rod, and the middle fixed sleeve of the handle rod is provided with two parallel anti-slip baffle plates, and the two anti-slip baffle plates are respectively attached to the inner and outer side walls of the overhead support leg.

[0017] Preferably, one end of the handle rod is hollow and movably inlaid with a movable ball, a thrust spring is provided in the inner cavity of one end of the handle rod, and a groove corresponding to the movable ball is provided on the inner wall on the other side of the overhead support leg, and the height position of the groove corresponds to the height position of the upper end of the guide vertical slot.

[0018] Preferably, a helical tooth groove is opened in the middle of the surface of the roller, and a one-way limit rod is rotatably installed on the lower end of the support plate near the roller surface through a pin shaft, one end of the one-way limit rod is movably inserted into the bottom of the helical tooth groove and adapted thereto, and the one-way limit rod is horizontally arranged and a reset torsion spring is arranged between the one-way limit rod and the support plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention provides a V-shaped driving frame at the lower side between the two groups of "X"-shaped frames, and a handle bar is provided on the outer side of the V-shaped driving frame. The staff can hook or step on the handle bar to move up and down and drive the V-shaped driving frame to deform, thereby driving the support plate to fold or unfold. After the support plate is unfolded, it can be supported on the ground to facilitate the movement of the filter box. The upper parts of the two groups of "X"-shaped frames are both provided with shock-absorbing assemblies for buffering and shock absorption. A control rod is provided between the two shock-absorbing assemblies. The rotation of the control rod can control whether the "X"-shaped frame is connected to the shock-absorbing assembly, so as to avoid obstruction when the "X"-shaped frame is folded and stored. A knob and an extension frame are installed on the end of the control rod, which is convenient for the staff to operate with their feet. The device does not need to push the filter box to tilt, and is safer when used. The folding or unfolding of the "X"-shaped frame can be operated by the feet of the staff, and there is no need to bend over for manual operation, which is more convenient and labor-saving when used. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the interior of the overhead support leg structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the installation of the support plate structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the connection between the V-shaped drive frame and the handlebar structure of the present invention;

[0025] Figure 5 It is a three-dimensional schematic diagram of the structure of the shock absorbing assembly of the present invention;

[0026] Figure 6 It is a three-dimensional schematic diagram of the support block structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the shock absorbing assembly of the present invention;

[0028] Figure 8 It is a three-dimensional schematic diagram of the control rod structure of the present invention;

[0029] Fig. 9 This is an enlarged schematic diagram of the structure at A in the figure of the present invention;

[0030] Fig.10 It is a partial cutaway schematic diagram of the support plate structure of the present invention;

[0031] Fig.11 It is a schematic cross-sectional view of the roller structure of the present invention.

[0032] In the figure: 1, filter box; 2, overhead support; 21, storage slot; 22, guide vertical slot; 221, rubber block; 23, installation hole; 24, limit convex block; 25, grooved slide rail; 3, support plate; 31, roller; 32, special-shaped shaft rod; 33, oblique tooth groove; 34, one-way limit rod; 4, V-shaped drive frame; 5, handle rod; 51, stop rod; 52, connecting plate; 53, movable ball; 54, thrust spring; 55, anti-slip baffle; 6, shock absorbing assembly; 6 01. Sealing sleeve; 602. Telescopic shaft; 603. Sealing plug; 604. Buffer spring; 605. Storage slot; 606. Damping hole; 61. Connecting sleeve; 62. Connecting block; 63. Avoiding slide groove; 64. Support block; 641. Oblique cut; 65. Stand; 66. Return spring; 67. Connecting frame; 68. Boss; 69. Slot; 7. Control lever; 71. Push block; 72. Ring; 73. Limiting notch; 74. Knob; 75. Extension frame. DETAILED DESCRIPTION

[0033] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0037] See also Figures 1 to 11 , the present invention provides a technical solution:

[0038] Embodiment 1, a mobile APF active filter, includes: a filter box 1 and a V-shaped driving frame 4.

[0039] Specifically, overhead legs 2 are installed on both sides of the bottom of the filter box 1. The overhead legs 2 are hollow structures and have storage slots 21 on the lower end faces. "X"-shaped frames are installed on both ends of the inner cavity of the overhead legs 2. The "X"-shaped frames can be folded and stored or unfolded. When the "X"-shaped frame is folded, the "X"-shaped frame can be stored inside the overhead legs 2 to achieve separation from the ground. At this time, the lower end faces of the overhead legs 2 are in contact with the ground to support the filter box 1. When the "X"-shaped frame is unfolded, the lower part of the "X"-shaped frame extends below the overhead legs 2, and the overhead legs 2 remain suspended, and the "X"-shaped frame supports the filter box 1.

[0040] The "X"-shaped frame includes two mutually intersecting support plates 3, the middle parts of the two support plates 3 are rotatably connected by a pin shaft, and the lower end of the support plate 3 is rotatably mounted with a roller 31. After the "X"-shaped frame is unfolded, the roller 31 contacts the ground, and the filter box 1 can be easily moved. One upper end of the "X"-shaped frame is rotatably connected to the overhead support leg 2, that is, the upper end of one support plate 3 is rotatably connected to the overhead support leg 2 through a pin shaft, and the upper end of the other support plate 3 is provided with a special-shaped shaft rod 32, such as Figure 3 As shown, the "X"-shaped frame on the left side of the overhead leg 2 can rotate around the upper left end of the "X"-shaped frame, and the "X"-shaped frame on the right side of the overhead leg 2 can rotate around the upper right end of the "X"-shaped frame, thereby avoiding the "X"-shaped frame itself from colliding with the overhead leg 2 during the folding or unfolding process and causing obstruction. The inner wall of the overhead leg 2 is fixed with a grooved slide rail 25 corresponding to the special-shaped shaft rod 32. One end of the special-shaped shaft rod 32 is movably inserted into the inner cavity of the grooved slide rail 25 and slides along its length direction. The grooved slide rail 25 is set to limit the sliding track of the special-shaped shaft rod 32 so that it can only slide in the horizontal direction, thereby ensuring that the two rollers 31 on one "X"-shaped frame can contact the ground at the same time, thereby improving stability.

[0041] Furthermore, a shock absorbing assembly 6 is provided between the two ends of the upper portion of the "X"-shaped frame, and both ends of the shock absorbing assembly 6 are connected to the ends of the "X"-shaped frame, such as Figure 2 As shown, the two ends of the shock-absorbing assembly 6 are respectively connected to the upper ends of the two support plates 3. When the "X"-shaped frame is unfolded and the roller 31 is supported on the ground, when the device is vibrated, the "X"-shaped frame will fold or unfold to a certain extent, and the shock-absorbing assembly 6 can produce good buffering and shock absorption for the "X"-shaped frame, thereby reducing the vibration of the filter box 1, which is used to improve the stability of the filter box 1 during movement, avoid the filter box 1 from tipping over, and damage to the electrical appliances inside the filter box 1. A rotatable control rod 7 is provided between the two shock-absorbing assemblies 6. The control rod 7 rotates and controls the other upper end of the "X"-shaped frame to separate from one end of the shock-absorbing assembly 6. That is to say, when the "X"-shaped frame needs to be folded and stored, the staff releases the connection between one end of the shock-absorbing assembly 6 and the "X"-shaped frame by rotating the control rod 7, and the "X"-shaped frame can be easily folded and stored.

[0042] In addition, the V-shaped drive frame 4 is located between the two "X"-shaped frames, and a folding pin is provided in the middle of the V-shaped drive frame 4. The two ends of the V-shaped drive frame 4 are rotatably connected to the lower ends of the two "X"-shaped frames. Figure 3 As shown, when the middle part of the V-shaped driving frame 4 slides up and down in the vertical direction, the V-shaped driving frame 4 itself can be deformed, and its two ends can be close to or away from each other, thereby pushing the "X"-shaped frame to deform. In other words, the folding or unfolding of the "X"-shaped frame is achieved by the up and down sliding of the middle part of the V-shaped driving frame 4, and a handle bar 5 is provided on the outside of the V-shaped driving frame 4. The handle bar 5 drives the V-shaped driving frame 4 to deform and then drives the "X"-shaped frame to deform. When standing, the staff can control the handle bar 5 to slide up and down by their feet to control the "X"-shaped frame to fold or unfold through the V-shaped driving frame 4, and the two "X"-shaped frames at the two ends of the overhead support leg 2 keep synchronous action, ensuring that the operation of the device is more convenient.

[0043] In order to keep the connection block 62 connected to the special-shaped shaft rod 32, the middle cross-section of the special-shaped shaft rod 32 of the present application is in a "D" shape, one end of the shock absorbing assembly 6 is fixedly connected to the connection block 62, the middle of the connection block 62 is provided with an avoidance slide 63, and the special-shaped shaft rod 32 is movably connected with the avoidance slide 63, and the upper and lower sides of the inner cavity at one end of the avoidance slide 63 are movably plugged with support blocks 64, the special-shaped shaft rod 32 is located at one end of the avoidance slide 63 and is blocked by the support block 64, combined with Figure 7 and Fig.10As shown, when the special-shaped shaft rod 32 slides to the left along the inner cavity of the avoidance groove 63 and passes over the support block 64, the support block 64 can block the vertical side of the right side of the special-shaped shaft rod 32. At this time, whether the special-shaped shaft rod 32 moves to the left or to the right, it will drive the connecting block 62 to move synchronously, and then drive the shock absorbing assembly 6 to retract and retract. The shock absorbing assembly 6 itself has a buffering and shock absorbing effect, so that it can play a buffering and shock absorbing role in the folding or unfolding process of the "X"-shaped frame, thereby improving the stability of the filter box 1 during the movement process.

[0044] In order to prevent the connection block 62 from hindering the folding and storage of the "X"-shaped frame, the present application also has an oblique cut 641 on the side of the support block 64 away from the special-shaped shaft 32, and the ends of the two support blocks 64 away from each other are both provided with a return spring 66, such as Figure 6 and Figure 5 As shown, when the special-shaped shaft rod 32 moves horizontally, when the special-shaped shaft rod 32 squeezes the oblique cut 641, the support block 64 can move vertically, and the special-shaped shaft rod 32 can pass over the support block 64 at this time until the special-shaped shaft rod 32 is separated from the support block 64, and the support block 64 is reset under the elastic force of the return spring 66, and the mutual support blocks 64 are close to and fit each other, thereby preventing the special-shaped shaft rod 32 from sliding in the opposite direction. At this time, the special-shaped shaft rod 32 and the connecting block 62 can remain relatively fixed, and the special-shaped shaft rod 32 can drive the connecting block 62 to move synchronously when moving. A stand 65 is provided on the outer side of the return spring 66, and the stand 65 is fixed to the surface of the connecting block 62. The stand 65 is used to install and fix the return spring 66 to achieve the reset of the support block 64. A connecting frame 67 is provided between the two connecting blocks 62, and the two ends of the connecting frame 67 are respectively fixedly connected to the two support blocks 64 in symmetrical positions, as shown in FIG. Figure 6 and Figure 5 As shown, the connecting frame 67 fixes the support blocks 64 on the left and right sides together. The staff can release the limiting effect of the support blocks 64 on the special-shaped shaft 32 by controlling the two connecting frames 67 to move away from each other, thereby avoiding the connection blocks 62 from hindering the folding and storage process of the "X"-shaped frame.

[0045] In order to facilitate the staff to use their feet to control the movement of the support block 64, the present application also has a boss 68 fixedly connected to the middle of the connecting frame 67, and a slot 69 is provided on the side of the two bosses 68 close to each other, and a control rod 7 is arranged between the two bosses 68, and one end of the control rod 7 is fixedly connected to a push block 71, and the cross section of the push block 71 is elliptical, such as Figure 8As shown, when the control rod 7 is rotated, the end of the push block 71 can squeeze the boss 68 and drive the two connecting frames 67 to move away from each other until the two ends of the push block 71 are respectively stuck in the bottom of the two card slots 69. At this time, the two connecting frames 67 move away from each other to the maximum stroke, thereby releasing the support block 64 from limiting the position of the special-shaped shaft rod 32. A knob 74 is fixedly connected to the other end of the control rod 7, and an extension frame 75 is fixed on the surface of the knob 74. The knob 74 and the extension frame 75 are both located on the outside of the overhead support leg 2. The staff can drive the extension frame 75 to rotate and move only with their feet. A mounting through hole 23 for the control rod 7 to pass through is opened on the inner wall of the overhead support leg 2, and a limiting protrusion 24 is set at the open end of the mounting through hole 23. A collar 72 is fixed on the outside of the control rod 7. A limiting notch 73 is opened on the surface of the collar 72, and the limiting protrusion 24 corresponds to the limiting notch 73. The central angle of the limiting notch 73 is ninety degrees. Figure 8 and Fig. 9 As shown, the limiting protrusion 24 cooperates with the collar 72 to limit the rotation angle of the control rod 7. The control rod 7 can only rotate ninety degrees at most. Therefore, after the push block 71 is rotated to be inserted into the inner cavity of the card slot 69, it can maintain a stable position.

[0046] In order to describe the structure of the shock absorbing assembly 6 in detail, the present application also has a connecting sleeve 61 fixedly connected to the other end of the shock absorbing assembly 6, and the connecting sleeve 61 is sleeved on a pin shaft at an upper end of the "X"-shaped frame to maintain connection with the "X"-shaped frame. The shock absorbing assembly 6 includes a sealing sleeve 601 and a telescopic shaft 602 movably plugged into the inner cavity of the sealing sleeve 601. Figure 7 As shown, the telescopic shaft 602 can slide along its own length direction to ensure that the shock absorbing assembly 6 can be telescoped as a whole, so as to adapt to the folding or unfolding process of the "X"-shaped frame. The inner cavity of the sealing sleeve 601 is provided with a sealing plug 603 and is fixedly connected to the end of the telescopic shaft 602. The sealing plug 603 and the sealing sleeve 601 are kept sealed. The interior of the telescopic shaft 602 is provided with a receiving slot 605. The middle part of the sealing plug 603 is provided with a damping hole 606 which connects the receiving slot 605 and the inner cavity of the sealing sleeve 601. The inner cavity of the sealing sleeve 601 It is filled with hydraulic oil and has a buffer spring 604. When the shock absorbing assembly 6 is extended or retracted, the hydraulic oil in the inner cavity of the sealing sleeve 601 is exchanged with the inner cavity of the receiving slot 605 through the damping hole 606. Since the damping hole 606 has a small inner diameter and the viscosity of the hydraulic oil itself, it can produce a damping effect on the sliding of the telescopic shaft 602. The setting of the buffer spring 604 can cooperate with the hydraulic oil to buffer the impact force exerted on the shock absorbing assembly 6, thereby ensuring that the shock absorbing assembly 6 as a whole has a good buffering and shock-absorbing effect.

[0047] In order to limit the up and down movement of the handle bar 5, the present application also has a guide vertical groove 22 penetrating through the inner wall of the overhead support leg 2, the handle bar 5 is movably connected with the guide vertical groove 22, a rubber block 221 is bonded and fixed to the upper half of the inner cavity of the guide vertical groove 22, and a cutout groove is opened in the middle of the rubber block 221, and the corners of the rubber block 221 are provided with rounded corners, such as Fig. 9 and Figure 4 As shown, when the handle bar 5 moves upward, the handle bar 5 can squeeze the rubber block 221 and pass over the rubber block 221, but the handle bar 5 cannot pass over the rubber block 221 and move downward only by gravity. The staff can squeeze the rubber block 221 by stepping on the handle bar 5 downward to ensure the downward movement of the handle bar 5.

[0048] In order to prevent the handle bar 5 from tilting, the present application further has a stop bar 51 disposed below one end of the handle bar 5, and the handle bar 5 and the stop bar 51 are respectively located at the upper and lower sides of the V-shaped drive frame 4, such as Figure 4 As shown, when the handle rod 5 moves up and down, it can drive the middle part of the V-shaped driving frame 4 to move up and down, thereby driving the V-shaped driving frame 4 to deform. A connecting plate 52 is fixedly connected between the baffle rod 51 and the handle rod 5. Two parallel anti-slip baffles 55 are fixedly sleeved in the middle part of the handle rod 5, and the two anti-slip baffles 55 are respectively attached to the inner and outer side walls of the overhead support leg 2. The anti-slip baffles 55 are arranged to keep the handle rod 5 in sliding connection with the side walls of the overhead support leg 2 and prevent the handle rod 5 itself from tilting.

[0049] In order to further improve the limiting effect of the handlebar 5, one end of the handlebar 5 of the present application is hollow and movably inlaid with a movable ball 53, a thrust spring 54 is arranged in the inner cavity of one end of the handlebar 5, and a groove corresponding to the movable ball 53 is opened on the inner wall of the other side of the overhead support leg 2, and the height position of the groove corresponds to the height position of the upper end of the guide vertical slot 22. Figure 4 As shown, when the handle bar 5 slides up to the highest position, the thrust spring 54 pushes the movable ball 53 to extend and fit into the groove on the inner wall of the other side of the overhead support leg 2, further positioning the handle bar 5 to prevent the handle bar 5 from moving down easily.

[0050] In order to improve the safety of the filter box 1 when it moves, the present application also has a helical tooth groove 33 in the middle of the surface of the roller 31, and a one-way limit rod 34 is installed on the lower end of the support plate 3 near the surface of the roller 31 through a pin shaft. One end of the one-way limit rod 34 is movably inserted into the bottom of the helical tooth groove 33 and adapted thereto. The one-way limit rod 34 is horizontally arranged and a reset torsion spring is arranged between the one-way limit rod 34 and the support plate 3. Fig.11As shown, when the roller 31 rotates counterclockwise, the one-way limit rod 34 can be automatically pushed by the bevel groove 33 and separated from the bevel groove 33. When the roller 31 rotates clockwise, the one-way limit rod 34 can be stuck in the bottom of the bevel groove 33 and limit the rotation of the roller 31. In other words, the roller 31 of the device can only rotate in a predetermined direction and cannot rotate in the opposite direction, thereby ensuring that the filter box 1 can only move forward. When the filter box 1 goes uphill, it can effectively prevent the filter box 1 from moving backward, thereby improving the safety of the filter box 1 when moving.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable APF active filter, characterized by: include: A filter box (1), wherein overhead legs (2) are installed on both sides of the bottom of the filter box (1), the overhead legs (2) are hollow in structure and a receiving slot (21) is provided on the lower end surface, and "X"-shaped frames are installed on both ends of the inner cavity of the overhead legs (2); One upper end of the "X"-shaped frame is rotatably connected to the overhead support leg (2); a shock absorbing assembly (6) is provided between the two ends of the upper portion of the "X"-shaped frame, and both ends of the shock absorbing assembly (6) are connected to the ends of the "X"-shaped frame; a rotatable control rod (7) is provided between the two shock absorbing assemblies (6); the control rod (7) rotates and controls the other upper end of the "X"-shaped frame to separate from one end of the shock absorbing assembly (6); A V-shaped drive frame (4), the V-shaped drive frame (4) being located between the two "X"-shaped frames, a folding pin being arranged in the middle of the V-shaped drive frame (4), two ends of the V-shaped drive frame (4) being rotatably connected to the lower ends of the two "X"-shaped frames respectively, a handle bar (5) being arranged on the outside of the V-shaped drive frame (4), the handle bar (5) driving the V-shaped drive frame (4) to deform and thereby driving the "X"-shaped frames to deform; The "X"-shaped frame comprises two mutually intersecting support plates (3), the middle parts of the two support plates (3) are rotatably connected via a pin shaft, a roller (31) is rotatably mounted on the lower end of the support plate (3), the upper end of one of the support plates (3) is rotatably connected to the overhead support leg (2) via a pin shaft, and the upper end of the other support plate (3) is provided with a special-shaped shaft rod (32).

2. The mobile APF active filter according to claim 1, characterized in that: The middle cross-section of the special-shaped shaft rod (32) is in a "D" shape. One end of the shock-absorbing assembly (6) is fixedly connected to a connecting block (62). An avoidance slide groove (63) is provided in the middle of the connecting block (62). The special-shaped shaft rod (32) and the avoidance slide groove (63) are movably connected through each other. Support blocks (64) are movably inserted into the upper and lower sides of the inner cavity of one end of the avoidance slide groove (63). The special-shaped shaft rod (32) is located at one end of the avoidance slide groove (63) and is blocked by the support block (64). A grooved slide rail (25) corresponding to the special-shaped shaft rod (32) is fixed to the inner wall of the overhead support leg (2). One end of the special-shaped shaft rod (32) is movably inserted into the inner cavity of the grooved slide rail (25) and slides along its length direction.

3. The mobile APF active filter according to claim 2, characterized in that: An oblique cut (641) is provided on a side of the support block (64) away from the special-shaped shaft rod (32); a return spring (66) is provided at one end of the two support blocks (64) away from each other; a stand (65) is provided on the outside of the return spring (66); and the stand (65) is fixed to the surface of the connecting block (62); a connecting frame (67) is provided between the two connecting blocks (62); and the two ends of the connecting frame (67) are respectively fixedly connected to the two support blocks (64) at symmetrical positions.

4. The mobile APF active filter according to claim 3 is characterized in that: A boss (68) is fixedly connected to the middle of the connecting frame (67), and a groove (69) is provided on one side of the two bosses (68) close to each other. A control rod (7) is arranged between the two bosses (68), and a push block (71) is fixedly connected to one end of the control rod (7), and the cross section of the push block (71) is elliptical. A knob (74) is fixedly connected to the other end of the control rod (7), and an extension frame (75) is fixed to the surface of the knob (74). A mounting through hole (23) for the control rod (7) to pass through is formed through the inner wall of the overhead support leg (2), and a limiting protrusion (24) is provided at the open end of the mounting through hole (23). A collar (72) is fixed to the outer side of the control rod (7), and a limiting notch (73) is provided on the surface of the collar (72), and the limiting protrusion (24) corresponds to the limiting notch (73), and the central angle of the limiting notch (73) is ninety degrees.

5. The mobile APF active filter according to claim 4 is characterized in that: The other end of the shock absorbing component (6) is fixedly connected to a connecting sleeve (61), and the connecting sleeve (61) is sleeved on a pin shaft at an upper end of the "X"-shaped frame. The shock absorbing component (6) comprises a sealing sleeve (601) and a telescopic shaft (602) movably plugged into the inner cavity of the sealing sleeve (601). The inner cavity of the sealing sleeve (601) is provided with a sealing plug (603) and is fixedly connected to the end of the telescopic shaft (602). A receiving slot (605) is provided inside the telescopic shaft (602). A damping hole (606) is provided in the middle of the sealing plug (603) and communicates with the receiving slot (605) and the inner cavity of the sealing sleeve (601). The inner cavity of the sealing sleeve (601) is filled with hydraulic oil and a buffer spring (604) is placed.

6. The mobile APF active filter according to claim 5, characterized in that: A guide vertical groove (22) is formed through the inner wall of the overhead support leg (2), the handle bar (5) is movably connected to the guide vertical groove (22), a rubber block (221) is bonded and fixed to the upper half of the inner cavity of the guide vertical groove (22), a notch groove is formed in the middle of the rubber block (221), and rounded corners are provided at the corners of the rubber block (221).

7. The mobile APF active filter according to claim 6, characterized in that: A stopper rod (51) is provided below one end of the handle bar (5), and the handle bar (5) and the stopper rod (51) are respectively located at the upper and lower sides of the V-shaped drive frame (4), a connecting plate (52) is fixedly connected between the stopper rod (51) and the handle bar (5), and two parallel anti-slip baffles (55) are fixedly sleeved in the middle of the handle bar (5), and the two anti-slip baffles (55) are respectively fitted to the inner and outer side walls of the overhead support leg (2).

8. The mobile APF active filter according to claim 7, characterized in that: One end of the handle bar (5) is hollow and movably inlaid with a movable ball (53); a thrust spring (54) is provided in the inner cavity of one end of the handle bar (5); a groove corresponding to the movable ball (53) is provided on the inner wall of the other side of the overhead support foot (2); and the height position of the groove corresponds to the height position of the upper end of the guide vertical slot (22).

9. The mobile APF active filter according to claim 1, characterized in that: A helical tooth groove (33) is provided in the middle of the surface of the roller (31); a one-way limit rod (34) is rotatably mounted on the lower end of the support plate (3) near the surface of the roller (31) via a pin; one end of the one-way limit rod (34) is movably plugged into the bottom of the helical tooth groove (33) and matched therewith; the one-way limit rod (34) is arranged horizontally and a return torsion spring is arranged between the one-way limit rod (34) and the support plate (3).

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