Motor frequency converter

Abstract

The utility model relates to the technical field of motor starting frequency converters, and discloses a motor frequency converter which comprises a frequency converter body. The frequency converter further comprises two fixing sleeves, the two fixing sleeves are fixed through a connecting plate, the frequency converter body is fixedly sleeved with the fixing sleeves, one fixing sleeve is located at the end of the frequency converter body, an end cover A is hinged to the end, away from the frequency converter body, of the fixing sleeve, and a rotary knob of the frequency converter body is located in the end cover A; the end cover A is locked with the fixing sleeve through a fastening assembly, an end cover B is hinged to the face, away from the fixing sleeve, of the end cover A, the end cover B and the end cover A are locked through a fastening assembly, and an on-off assembly is further installed in the end cover B; according to the motor frequency converter, the end cover A, the end cover B and the fastening assembly are arranged, the fastening assembly can achieve the limiting effect when the motor frequency converter is covered, the situation that knob parameters are changed due to mistaken touch is avoided, and automatic on-off can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor starting frequency converters, in particular to a motor frequency converter. Background Art

[0002] The existing crane control system used contactors to control the motor's start, stop, and operation. Due to the crane's frequent starts and stops during operation, the contactors were frequently on and off, causing severe wear and arcing damage to the contactor's mechanical components, leading to contactor failure. Furthermore, contactor control made it difficult to achieve smooth motor startup and precise speed regulation, and was prone to impacting the motor and mechanical transmission components, resulting in high maintenance costs. To address these issues, the decision was made to switch the crane's control system from contactor control to frequency converter control. Frequency converters precisely control the motor's speed by varying the motor's power supply frequency, thereby improving the equipment's operational performance. The frequency converter is an electric power control device that applies frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply. Some frequency converters are equipped with a knob with an adjustment function. Since the knob is protruding from the outside of the frequency converter, it is often accidentally touched in daily life and the knob is rotated, causing the data on the frequency converter to change and affect the operation of the motor. Or, non-staff members such as children may rotate the knob for no reason and affect the operation of the motor, causing unnecessary problems or hidden dangers in the operation of the equipment, and thus the knob switch needs to be protected.

[0003] The Chinese patent CN202223391295.9 is entitled: A motor frequency converter that prevents accidental touching, comprising a frequency converter body and a protective plate, wherein the protective plate is located at the front of the frequency converter body, and the left and right sides of the back of the protective plate are fixedly connected with L-shaped card plates, and the front positions of the left and right sides of the frequency converter body are provided with slideways, and the outer surface of the L-shaped card plate is slidably connected to the inner surface of the slideway. The utility model can protect the front of the frequency converter body by setting the protective plate to prevent unauthorized personnel from touching the switch in an accidental manner, and can fix and limit the protective plate when it is protected by setting the L-shaped card plate, the slideway, the limit plate, the compression spring and the push plate, and can also limit the protective plate when it is opened, thereby facilitating the staff to operate the control button when the protective plate is opened. By setting the above structure, the utility model has the advantages of good anti-accidental touching protection effect on the motor frequency converter and convenient operation of the button by the staff.

[0004] However, when the device is in use, the protective plate is pushed backward to cause a misalignment between the L-shaped card plate and the limit plate, so that the protective plate falls to use the operation button. However, there is no limiting device for the protective plate, and the protective plate is easy to fall if it is accidentally touched. Secondly, when the protective plate falls, it will hit the bottom of the slide slot, thereby causing the inverter to vibrate, which is easy to cause damage to the inverter. Utility Model Content

[0005] (1) Technical problems solved

[0006] In view of the deficiencies in the prior art, the present invention provides a motor frequency converter with the advantages of safe switching and safety protection, solving the problems of high-frequency switching that is prone to danger and buttons that are easily touched by mistake.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a motor frequency converter, comprising a frequency converter body; and further comprising a fixing sleeve, wherein two fixing sleeves are provided, and the two fixing sleeves are fixed with a connecting plate, and both fixing sleeves are fixedly sleeved on the frequency converter body, wherein one fixing sleeve is located at the end position of the frequency converter body, and the end of the fixing sleeve away from the frequency converter body is hingedly connected to an end cover A, and the knob of the frequency converter body is located in the end cover A, and the end cover A is locked to the fixing sleeve with a fastening assembly, and the side of the end cover A away from the fixing sleeve is hingedly connected to the end cover B, and the end cover B is also locked with the end cover A with a fastening assembly, and a switching assembly is also installed in the end cover B.

[0009] In some embodiments, the on-off assembly includes a conductive plate A, a conductive plate B, a folded wire, a knife switch and an electromagnet. The conductive plate A and the conductive plate B are both located in the end cover B and fixed on the end cover A. There are multiple folded wires, one end of which is connected to the inverter body, and the other end is respectively connected to the conductive plate A and the conductive plate B. A rotating wheel is fixedly installed at one end of the knife switch. The rotating wheel and the knife switch are both located in the end cover B and elastically hinged on the end cover A. An auxiliary wheel is installed on the conductive plate A, and the auxiliary wheel is in contact with the rotating wheel. The circuit can be connected from the conductive plate A through the knife switch to the conductive plate B. The electromagnet is fixedly installed on the inner wall of the end cover B. After the electromagnet is energized, it can adsorb the knife switch to separate the knife switch from the conductive plate B to disconnect the circuit.

[0010] In some embodiments, the middle position of the foldable wire is set to a folded state, which can be closed after being pressed.

[0011] In some embodiments, a through slot is provided on the outer wall of the end cap B corresponding to the folded wire, and the through slot connects the inside and outside of the end cap B.

[0012] In some embodiments, a torsion spring is installed at the hinge position between the rotating wheel and the outer wall of the end cover A.

[0013] In some embodiments, the fastening assembly includes an elastic frame and a plurality of ratchets, wherein the elastic frame and the ratchets are respectively connected to the two hinged members, and the elastic frame can be buckled on the ratchets and locked by the ratchets.

[0014] In some embodiments, the hinge points of end cap A and end cap B are located at the upper and lower sides respectively.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the present invention provides a motor frequency converter with the following beneficial effects:

[0017] 1. The motor inverter is provided with end cover A, end cover B and fastening assembly. End cover A can protect the knob of the inverter body. When using the knob, end cover A can be opened. At this time, end cover B and its internal components are flipped down at the same time, making it easier to operate the knob. When the cover is closed, the fastening assembly can achieve a limit effect, and the knob parameters will not change due to accidental touch.

[0018] 2. The motor inverter is equipped with an on-off component. As an auxiliary component, the on-off component is arranged in the end cover B, which can realize automatic on and off. After connection, the inverter can be used to function, combining the advantages of the existing traditional switch and the inverter. In addition, it is easy to check the connection status after the end cover B is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a cross-sectional view of the structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the state of the utility model;

[0022] Figure 4 This is a schematic diagram of another state of the utility model;

[0023] Figure 5 For this utility model Figure 1 A magnified view of the structure at point A.

[0024] In the figure: 1. Inverter body; 2. Fixing sleeve; 3. Connecting plate; 4. End cover A; 5. Fastening assembly; 501. Elastic frame; 502. Ratchet; 6. End cover B; 7. On-off assembly; 701. Conductive plate A; 702. Conductive plate B; 703. Folding wire; 704. Switch; 705. Electromagnet; 706. Rotating wheel; 707. Auxiliary wheel; 708. Through slot. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0026] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0027] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0029] In the related art, when in use, the protective plate is pushed backward to cause misalignment between the L-shaped card plate and the limit plate, so that the protective plate falls to use the operating button, but there is a lack of a limiting device for the protective plate, and the protective plate is easy to fall off in the event of accidental contact. Secondly, when the protective plate falls, it will hit the bottom of the slide slot, thereby causing the inverter to vibrate, which can easily cause damage to the inverter.

[0030] In order to solve the problems in the related art to a certain extent, an embodiment of the present application provides a motor inverter. When it needs to be used, the end cover A4 can be opened only when the knob is used. At this time, the end cover B6 and the components inside it are flipped down at the same time, which is convenient for operating the knob. When the cover is closed, the fastening component 5 can achieve a limiting effect, and the knob parameters will not change due to accidental touch.

[0031] The present application is described below with reference to specific embodiments and with reference to the accompanying drawings:

[0032] Combine Figure 1-Figure 5The embodiment of the present application provides a motor inverter, including an inverter body 1; and also includes a fixing sleeve 2, two fixing sleeves 2 are provided, and the two fixing sleeves 2 are fixed by a connecting plate 3, and the fixing sleeves 2 are fixedly sleeved on the inverter body 1, and one of the fixing sleeves 2 is at the end position of the inverter body 1, and the end of the fixing sleeve 2 away from the inverter body 1 is hinged with an end cover A4, and the knob of the inverter body 1 is in the end cover A4, and the end cover A4 is locked with the fixing sleeve 2 by a fastening assembly 5, and the side of the end cover A4 away from the fixing sleeve 2 is hinged with an end cover B6, and the end cover B6 and the end cover A4 are also locked by a fastening assembly 5, and a switching assembly 7 is also installed in the end cover B6.

[0033] In this embodiment: the fixing sleeve 2 can be installed on the existing inverter body 1 and fastened with bolts. It can adapt to universal inverters. The end cover A4 and the end cover B6 extend forward in the electrical box, and their thickness meets the front and rear space requirements of the existing electrical box.

[0034] In some embodiments, the on-off assembly 7 includes a conductive plate A701, a conductive plate B702, a folded wire 703, a knife switch 704 and an electromagnet 705. The conductive plate A701 and the conductive plate B702 are both in the end cover B6 and fixed on the end cover A4. There are multiple folded wires 703, one end of which is connected to the inverter body 1, and the other end is respectively connected to the conductive plate A701 and the conductive plate B702. One end of the knife switch 704 is fixedly installed with a rotating wheel 706. The wheel 706 and the knife switch 704 are both located inside the end cover B6 and are elastically hinged on the end cover A4. An auxiliary wheel 707 is installed on the conductive plate A701. The auxiliary wheel 707 is in contact with the rotating wheel 706. The circuit can be connected from the conductive plate A701 through the knife switch 704 to the conductive plate B702. The electromagnet 705 is fixedly installed on the inner wall of the end cover B6. After the electromagnet 705 is energized, it can absorb the knife switch 704 to separate the knife switch 704 from the conductive plate B702 and disconnect the circuit.

[0035] Specifically, the on-off assembly 7 serves as an auxiliary connection component, which can achieve the effect of combining a traditional on-off switch with an existing frequency converter. It is controlled by an electromagnet 705 and is relatively safe. After the on-off connection is made, the frequency converter will function again.

[0036] In some embodiments, the middle position of the folding wire 703 is set to a folded state, and can be closed after being pressed.

[0037] Specifically, when the end cover A4 is opened, the end cover B6 moves together, so the foldable wire 703 can be folded after being squeezed and does not occupy space.

[0038] In some embodiments, a through slot 708 is formed on the outer wall of the end cap B6 corresponding to the folded conductive wire 703 , and the through slot 708 connects the inside and outside of the end cap B6 .

[0039] Specifically, the through slot 708 is provided mainly to allow the folded wire 703 to pass through without affecting the electrification of the folded wire 703 .

[0040] In some embodiments, a torsion spring is installed at the hinge position between the rotating wheel 706 and the outer wall of the end cover A4.

[0041] Specifically, the rotating wheel 706 is acted upon by the torsion spring so that the blade 704 is always in contact with the conductive plate B702.

[0042] In some embodiments, the fastening assembly 5 includes an elastic frame 501 and a plurality of ratchets 502 . The elastic frame 501 and the ratchets 502 are respectively connected to two hinged parts. The elastic frame 501 can be buckled on the ratchets 502 and locked by the ratchets 502 .

[0043] Specifically, when the elastic frame 501 is buckled on the ratchet 502 , the elastic frame 501 can be lifted to elastically deform, and then lose the binding force between the elastic frame 501 and the ratchet 502 .

[0044] In some embodiments, the hinge points of the end cap A4 and the end cap B6 are located at the upper and lower sides respectively.

[0045] Specifically, the opening of the end cover A4 and the end cover B6 do not affect each other.

[0046] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0047] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0048] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor frequency converter, comprising a frequency converter body (1); Its characteristics are: The invention also includes a fixing sleeve (2), two fixing sleeves (2) are provided, and the two fixing sleeves (2) are fixed with a connecting plate (3), and the fixing sleeves (2) are fixed on the inverter body (1), and one of the fixing sleeves (2) is located at the end of the inverter body (1), and the end of the fixing sleeve (2) away from the inverter body (1) is hinged with an end cover A (4), and the knob of the inverter body (1) is located in the end cover A (4), and the end cover A (4) is locked with the fixing sleeve (2) by a fastening component (5), and the end cover A (4) is hinged with an end cover B (6) on the side away from the fixing sleeve (2), and the end cover B (6) and the end cover A (4) are also locked by a fastening component (5), and a switching component (7) is also installed in the end cover B (6).

2. The motor frequency converter according to claim 1, characterized in that: The switch assembly (7) includes a conductive plate A (701), a conductive plate B (702), a folded wire (703), a knife switch (704) and an electromagnet (705). The conductive plate A (701) and the conductive plate B (702) are both located in the end cover B (6) and fixed on the end cover A (4). A plurality of folded wires (703) are provided, one end of which is connected to the inverter body (1) and the other end is respectively connected to the conductive plate A (701) and the conductive plate B (702). A rotating wheel (706) is fixedly installed on one end of the knife switch (704). The rotating wheel (706) is fixedly installed on the rotating wheel (706). 6) and the knife switch (704) are both located in the end cover B (6) and are elastically hinged on the end cover A (4). An auxiliary wheel (707) is installed on the conductive plate A (701), and the auxiliary wheel (707) contacts the rotating wheel (706). The circuit can be connected from the conductive plate A (701) through the knife switch (704) to the conductive plate B (702). The electromagnet (705) is fixedly installed on the inner wall of the end cover B (6). After the electromagnet (705) is energized, it can absorb the knife switch (704) to separate the knife switch (704) from the conductive plate B (702) and disconnect the circuit.

3. The motor frequency converter according to claim 2, characterized in that: The middle position of the folding wire (703) is set to a folded state, and can be closed after being pressed.

4. The motor frequency converter according to claim 1, characterized in that: A through slot (708) is provided on the outer wall of the end cap B (6) corresponding to the folded wire (703), and the through slot (708) communicates with the inside and outside of the end cap B (6).

5. The motor frequency converter according to claim 2, characterized in that: A torsion spring is installed at the hinged position between the rotating wheel (706) and the outer wall of the end cover A (4).

6. The motor frequency converter according to claim 1, characterized in that: The fastening assembly (5) comprises an elastic frame (501) and a plurality of ratchets (502); the elastic frame (501) and the ratchets (502) are respectively connected to two hinged parts; the elastic frame (501) can be buckled onto the ratchets (502) and locked by the ratchets.

7. The motor frequency converter according to claim 1, characterized in that: The hinge points of the end cover A (4) and the end cover B (6) are located at the upper and lower sides respectively.

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