Frequency converter with low-frequency and high-torque output

Abstract

The utility model relates to a frequency converter with low-frequency and high-torque output, and belongs to the technical field of frequency converters. In order to solve the problem that in existing equipment, a fan is troublesome to assemble, disassemble and maintain, the following technical scheme is provided: the device comprises a case, a mounting ring is welded to the top shell wall of the case, a supporting ring is fixedly connected to the inner wall of the bottom of the mounting ring, a connecting ring is movably connected to the interior of the mounting ring, and a grating plate is mounted at the top end of the connecting ring; and a fan is arranged in the mounting ring, a limiting mechanism located on the case is arranged on the periphery of the mounting ring, and the limiting mechanism comprises an annular shell welded to the outer wall of the top of the case. According to the utility model, the limiting mechanism is arranged to replace multidirectional insertion block limiting adopted in the prior art, so that when the connecting ring is assembled, disassembled and maintained, the connecting ring can be conveniently assembled only by a single-hand adjustment mode, the assembling convenience of the connecting ring is improved, and the burden of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, in particular to a frequency converter with low-frequency and high-torque output. Background Art

[0002] The inverter is a power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply. The inverter generates a lot of heat during operation. High temperature will affect the service life and reliability of the inverter, so fans and other heat dissipation components are usually required. It is found in the use of existing inverters that the fan is the component with the lowest lifespan in the inverter, and dust removal, inspection and other maintenance operations are often required. However, the fan is not easy to remove and install, making it difficult to repair after it is damaged.

[0003] There is a Chinese patent with authorization announcement number CN210225238U, which discloses a frequency converter that is easy to maintain and reduces usage limitations; it includes a chassis, a cavity is arranged inside the chassis, an opening is connected to the top of the chassis, a mounting ring is arranged on the inner wall of the opening, and multiple groups of air inlets are connected to the lower half of the left and right walls of the chassis; it also includes a support ring, a connecting ring, a left arc plate, a left spring, a left transition rod, a left connecting plate, a left fixed block, a right arc plate, a right spring, a right transition rod, a right connecting plate and a right fixed block, four groups of connecting rods are detachably arranged on the inner wall of the connecting ring, a motor is arranged at the other end of the four groups of connecting rods, a mounting plate is arranged at the output end of the motor, multiple groups of fan blades are arranged on the outer wall of the mounting plate, and the outer wall of the support ring is connected to the bottom end of the inner wall of the mounting ring.

[0004] Although the technical solutions in the above-mentioned reference documents relatively simplify the assembly structure of the fan, they still have the following defects:

[0005] The multi-directional clamping structure used by the equipment when assembling and disassembling the fan requires the staff to adjust multiple clamping structures at the same time to complete the assembly of the fan, which is not only troublesome but also puts a heavy workload on the staff.

[0006] Therefore, how to process the frequency converter is a technical problem that those skilled in the art currently need to solve. Utility Model Content

[0007] The utility model aims to solve the problems existing in the background technology and propose a frequency converter with low frequency and high torque output.

[0008] The technical solution of the utility model is as follows: a frequency converter with low frequency and high torque output, comprising a chassis, a mounting ring welded on the top shell wall of the chassis, a supporting ring fixedly connected to the bottom inner wall of the mounting ring, a connecting ring movably connected inside the mounting ring, a grille plate installed on the top of the connecting ring, and a fan arranged inside the mounting ring, a limiting mechanism located on the chassis is arranged around the mounting ring, the limiting mechanism comprises an annular shell welded to the top outer wall of the chassis, an inner gear ring movably connected inside the annular shell, a plurality of gears are connected to the inner ring of the inner gear ring via a rotating shaft, a rope winding wheel located on the rotating shaft is installed above the gear, and the side edge of each rope winding wheel is slidably connected to a slide located inside the annular shell, and a movable rod is welded on the side wall of the slide.

[0009] Preferably, the top of the chassis is symmetrically provided with hanging rings, and through holes located on the top shell wall of the chassis are opened between the symmetrical hanging rings.

[0010] Preferably, the mounting ring is welded in the through hole, and guide grooves are provided on inner walls on both sides of the mounting ring.

[0011] Preferably, guide bars are provided on both side outer walls of the connecting ring, the guide bars are slidably connected to the guide grooves, and a plurality of limiting grooves located on the circumferential wall of the connecting ring are opened above the guide bars along the circumferential direction.

[0012] Preferably, a plurality of grooves are formed on the top shell wall of the support ring along the circumferential direction, and a spring 1 is arranged in the groove.

[0013] Preferably, both ends of the rotating shaft are rotatably connected to the top and bottom inner walls of the annular shell respectively.

[0014] Preferably, an annular groove is provided on the outer ring shell wall of the annular shell, a plurality of sliders are slidably connected inside the annular groove, a support block is welded on the inner side of the slider, a side of the support block away from the slider is fixedly connected to the inner gear ring, and a protrusion is welded on the outer side of the slider.

[0015] Preferably, a traction rope is wound around the rope winding wheel, one end of the traction rope is bound to the slide plate, and a plurality of the movable rods are each provided with a spring 2, one end of the spring 2 is fixedly connected to the slide plate, and the other end of the spring 2 is arranged on the inner wall of the inner ring of the annular shell.

[0016] Preferably, the ends of the plurality of movable rods away from the slide plate all pass through the inner ring shell wall of the annular shell, and are installed with limit blocks, which are inserted into the limit grooves for limit.

[0017] Compared with the prior art, the utility model has the following beneficial technical effects:

[0018] Through the combination of various structures, the device can not only facilitate the disassembly and maintenance of the fan, but also replace the multi-directional plug limit used in the prior art by setting a limit mechanism, so that when the connecting ring is loaded and unloaded for maintenance, only one-handed adjustment is required to achieve convenient assembly of the connecting ring, thereby improving the convenience of its assembly and reducing the burden on the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A partial front cross-sectional structural schematic diagram of an embodiment of the utility model is given;

[0020] Figure 2 for Figure 1 A schematic diagram of a top cross-sectional structure of a limiting mechanism;

[0021] Figure 3 for Figure 1 A schematic diagram of the enlarged local structure.

[0022] Figure numerals: 1, chassis; 2, mounting ring; 3, support ring; 4, connecting ring; 5, grille plate; 6, limiting mechanism; 61, annular shell; 62, inner gear ring; 63, gear; 64, rope pulley; 65, slide plate; 66, movable rod; 7, fan. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Embodiment 1

[0025] like Figure 1 and Figure 3 As shown, the utility model proposes a low-frequency high-torque output frequency converter, including a chassis 1, a mounting ring 2 is welded on the top shell wall of the chassis 1, a support ring 3 is fixedly connected to the bottom inner wall of the mounting ring 2, a connecting ring 4 is movably connected inside the mounting ring 2, a grid plate 5 is installed on the top of the connecting ring 4, and a fan 7 is arranged inside the mounting ring 2. A limiting mechanism 6 located on the chassis 1 is arranged around the mounting ring 2, and the limiting mechanism 6 includes an annular shell 61 welded on the top outer wall of the chassis 1, and an inner gear ring 62 is movably connected inside the annular shell 61. The inner ring of the inner gear ring 62 is connected to a plurality of gears 63 through a rotating shaft, and a rope winding wheel 64 located on the rotating shaft is installed above the gear 63. The side of each rope winding wheel 64 is slidably connected to a slide plate 65 located inside the annular shell 61, and a movable rod 66 is welded on the side wall of the slide plate 65.

[0026] The working principle of a frequency converter with low frequency and high torque output based on the first embodiment is as follows: when the fan 7 is loaded and unloaded for maintenance, the inner gear ring 62 is rotated, and the rotating shaft is driven to rotate under the action of the meshing transmission between the inner gear ring 62 and the gear 63, and the movement of the rotating shaft causes the rope winding wheel 64 to move, and the rotation of the rope winding wheel 64 reels the traction rope, and as the traction rope is reeled in, the slide plate 65 is driven to move, and the movement of the slide plate 65 causes the movable rod 66 to retract, stretching the second spring, and the movement of the movable rod 66 causes the limit block to open the limit groove, thereby facilitating the removal of the connecting ring 4, and realizing convenient loading and unloading of the fan 7. When the maintenance of the fan 7 is completed, the inner gear ring 62 is adjusted to make the limit block retract, and the installation ring 4 that has been maintained is placed in the installation ring 2, and the inner gear ring 62 is loosened. Under the action of the second spring, the limit block returns to the initial state, and then the limit block is inserted into the limit groove of the connecting ring 4, realizing convenient assembly of the connecting ring 4.

[0027] Embodiment 2

[0028] like Figure 1-2 As shown, the utility model proposes a frequency converter with low frequency and high torque output. Compared with the first embodiment, this embodiment also includes: the top of the chassis 1 is symmetrically provided with lifting rings, and a through hole located on the top shell wall of the chassis 1 is opened between the symmetrical lifting rings, and the mounting ring 2 is welded in the through hole, and guide grooves are opened on the inner walls on both sides of the mounting ring 2, and guide strips are arranged on the outer walls on both sides of the connecting ring 4, and the guide strips are slidably connected with the guide grooves, and a plurality of limit grooves located on the peripheral wall of the connecting ring 4 are opened along the circumferential direction above the guide strips, and the ends of the plurality of movable rods 66 away from the slide plate 65 all pass through the inner ring shell wall of the annular shell 61, and limit blocks are installed, and the limit blocks and the limit grooves are inserted for limit.

[0029] In this embodiment, the sliding connection between the guide groove in the mounting ring 2 and the guide strip on the connecting ring 4 enables the connecting ring 4 to be accurately calibrated and assembled during the assembly process, and the limit groove on the connecting ring 4 is in a suitable position to facilitate the insertion of the limit block.

[0030] Embodiment 3

[0031] like Figure 1 and Figure 3As shown, the utility model proposes a frequency converter with low frequency and high torque output. Compared with the first embodiment or the second embodiment, the present embodiment also includes: a plurality of grooves are provided on the top shell wall of the support ring 3 in the circumferential direction, a spring 1 is arranged in the groove, the two ends of the rotating shaft are rotatably connected to the top and bottom inner walls of the annular shell 61 respectively, an annular groove is provided on the outer ring shell wall of the annular shell 61, a plurality of sliders are slidably connected inside the annular groove, a support block is welded on the inner side of the slider, a side of the support block away from the slider is fixedly connected to the inner gear ring 62, and a protrusion is welded on the outer side of the slider, a traction rope is wound around the rope wheel 64, one end of the traction rope is bound to the slide plate 65, a plurality of movable rods 66 are sleeved with a spring 2, one end of the spring 2 is fixedly connected to the slide plate 65, and the other end of the spring 2 is arranged on the inner wall of the inner ring of the annular shell 61.

[0032] In this embodiment, the function of spring 1 enables the connecting ring 4 to be pushed out after the limit is cancelled, so that the staff can take out the connecting ring 4 and further facilitate the maintenance of the fan 7.

[0033] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A frequency converter with low frequency and high torque output, comprising a case (1), a mounting ring (2) welded on the top shell wall of the case (1), a support ring (3) fixedly connected to the bottom inner wall of the mounting ring (2), a connecting ring (4) movably connected inside the mounting ring (2), a grille plate (5) installed on the top of the connecting ring (4), and a fan (7) arranged inside the mounting ring (2), characterized in that: The mounting ring (2) is surrounded by a limiting mechanism (6) located on the chassis (1), the limiting mechanism (6) comprising an annular shell (61) welded to the outer wall of the top of the chassis (1), the annular shell (61) is movably connected to an inner gear ring (62), the inner ring of the inner gear ring (62) is connected to a plurality of gears (63) via a rotating shaft, a rope winding wheel (64) located on the rotating shaft is installed above the gear (63), the side edge of each rope winding wheel (64) is slidably connected to a slide plate (65) located inside the annular shell (61), and a movable rod (66) is welded to the side wall of the slide plate (65).

2. The frequency converter with low frequency and high torque output according to claim 1, characterized in that: The top of the chassis (1) is symmetrically provided with hanging rings, and through holes located on the top shell wall of the chassis (1) are opened between the symmetrical hanging rings.

3. The frequency converter with low frequency and high torque output according to claim 2, characterized in that: The mounting ring (2) is welded in the through hole, and guide grooves are provided on the inner walls on both sides of the mounting ring (2).

4. The frequency converter with low frequency and high torque output according to claim 3, characterized in that: Guide strips are provided on both side outer walls of the connecting ring (4), the guide strips are slidably connected to the guide grooves, and a plurality of limit grooves located on the peripheral wall of the connecting ring (4) are provided above the guide strips along the circumferential direction.

5. The frequency converter with low frequency and high torque output according to claim 1, characterized in that: A plurality of grooves are provided on the top shell wall of the support ring (3) along the circumferential direction, and a spring 1 is arranged in the groove.

6. The frequency converter with low frequency and high torque output according to claim 1, characterized in that: The two ends of the rotating shaft are rotatably connected to the top and bottom inner walls of the annular shell (61) respectively.

7. The frequency converter with low frequency and high torque output according to claim 1, characterized in that: An annular groove is provided on the outer ring wall of the annular housing (61), a plurality of sliders are slidably connected inside the annular groove, a support block is welded on the inner side of the slider, a side of the support block away from the slider is fixedly connected to the inner gear ring (62), and a protrusion is welded on the outer side of the slider.

8. The frequency converter with low frequency and high torque output according to claim 1, characterized in that: A traction rope is wound around the rope winding wheel (64), one end of which is bound to the slide plate (65). A plurality of movable rods (66) are each provided with a spring 2, one end of which is fixedly connected to the slide plate (65), and the other end of which is arranged on the inner wall of the inner circle of the annular housing (61).

9. The frequency converter with low frequency and high torque output according to claim 4, characterized in that: The ends of the plurality of movable rods (66) away from the slide plate (65) all pass through the inner shell wall of the annular shell (61) and are provided with limit blocks, which are inserted into the limit grooves for limit positioning.

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