Soft starter convenient to assemble

Abstract

The soft starter convenient to assemble comprises a shell and a panel, a heat dissipation assembly, a circuit board and a silicon controlled rectifier are arranged in the shell, the heat dissipation assembly comprises heat dissipation pieces clamped on the two sides of the silicon controlled rectifier in a left-right mode, one side, corresponding to the panel, of each heat dissipation piece is provided with an installation sliding groove, and at least one end of each installation sliding groove is provided with an opening. A fastening assembly used for connecting the conducting strip is slidably arranged in the mounting sliding groove, one end of the conducting strip is provided with a first connecting hole matched with the fastening assembly, and the other end of the conducting strip extends out of the shell and is provided with a second connecting hole. By the adoption of the technical scheme, the heat dissipation piece is integrally formed, additional punching machining is not needed, the fastening assembly is arranged in the installation sliding groove in a sliding mode, the assembling efficiency is improved, meanwhile, the conducting strips are arranged above the installation sliding groove at the same height and do not need to be bent, power consumption generated by bending is reduced, the conducting strips do not need to be bent and are integrally formed, the production efficiency is high, and the precision is high. And rapid assembly is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of circuit equipment, in particular to a soft starter which is easy to assemble. Background Art

[0002] A soft starter (also known as a soft starter) is a novel motor control device that integrates soft starting, soft stopping, light-load energy saving, and various protection functions. It is primarily composed of a three-phase phase-parallel thyristor connected in series between the power supply and the controlled motor, along with its electronic control circuit. The soft starter controls the conduction angle of its internal thyristor (SCR) to gradually increase the motor input voltage from zero according to a preset function until the start is complete and full voltage is applied to the motor. This is known as soft starting. During the soft starting process, the motor's starting torque and speed gradually increase. Existing soft starters include a housing with input and output pins. Within the housing are a heat sink assembly, a circuit board, and a current sensing transformer, SCR, and transformer electrically connected to the circuit board. The input and output pins are both connected to the SCR.

[0003] For example, the applicant applied for a built-in bypass soft starter on December 27, 2019. The existing input pins and output pins are connected to the heat dissipation component through conductive sheets. Since one end of the existing conductive sheet needs to be punched and connected to the heat dissipation component with bolts, and the other end is connected to the input pin and output pin, the conductive sheet needs to be bent multiple times. During the production and use process, the following problems were found: First, the conductive sheet is easy to break due to bending, affecting its service life; second, there are processing problems with the bending angle, which is easy to produce errors and deviate from the first connection hole of the shell. Manual adjustment and reprocessing are required, and the processing efficiency is low; third, the conductive sheets connecting the input pins and output pins have different shapes and cannot be used interchangeably, further increasing production costs; fourth, bending reduces the conductive current and has high power consumption. Utility Model Content

[0004] Based on the above problems, the purpose of the present invention is to provide a soft starter that is easy to assemble.

[0005] In response to the above problems, the following technical solutions are provided: a soft starter that is easy to assemble, comprising a shell and a panel, wherein the shell includes a heat dissipation component, a circuit board and a thyristor, the heat dissipation component includes heat dissipation members clamped on both sides of the thyristor, a mounting groove is provided on one side of the heat dissipation member corresponding to the panel, and at least one end of the mounting groove is open, a fastening component for connecting a conductive sheet is slidably provided in the mounting groove, one end of the conductive sheet is provided with a first connection hole for mating with the fastening component, and the other end extends out of the shell and is provided with a second connection hole.

[0006] By adopting the above technical solution, compared with the existing conductive sheets that need to be bent and holes need to be punched on the side walls of the heat sink and then fixed by fasteners, the heat sink of the utility model is integrally formed, and no additional punching processing is required. The fastening component is slidably set in the installation slide groove. It is only necessary to align the first connecting hole with the fastening component, and then operate the fastening component to achieve disassembly and assembly, which greatly improves the assembly efficiency. At the same time, compared with the existing conductive sheets that need to be connected to the upper heat sink and the lower heat sink respectively, the conductive sheets have inconsistent shapes and need to be bent. The technical solution of the utility model adopts left and right clamping of the heat sink, and the conductive sheets are all arranged above the installation slide groove and set at the same height, without the need for bending, which greatly reduces the power consumption caused by bending. At the same time, the conductive sheet and the pin are integrally formed, with high stability, high strength, and long service life. The conductive sheet does not need to be bent, is integrally formed, has high production efficiency, high precision, and is convenient and quick to assemble.

[0007] The utility model is further configured as follows: the mounting groove is in an inverted T-shape, the fastening assembly includes a bolt, the bolt includes a nut inverted in the mounting groove and a screw adapted to the first connecting hole, the screw passes through the first connecting hole and is threadedly connected to a nut arranged outside the heat sink.

[0008] By adopting the above technical solution, the installation slot is opened at least at one end (one end is open or both ends are open), the nut moves from the opening into the installation slot, and is thereby locked in the installation slot, and the screw passes through the first connecting hole and is threadedly connected to the nut provided outside the heat sink, thereby realizing the connection between the heat sink and the conductive sheet, and the assembly is simple and convenient.

[0009] The utility model is further provided with: the heat sink is symmetrically arranged on one side of the corresponding panel and on one side of the corresponding shell inner wall, a positioning boss is arranged between the other side of the heat sink relative to the panel and the shell inner wall, and a fastening assembly for connecting the positioning boss and the heat sink is arranged in the mounting groove on one side of the heat sink corresponding to the shell inner wall, the fastening assembly includes a bolt with one end arranged in the mounting groove and a nut arranged outside the shell, and the positioning boss is provided with a mounting channel for the bolt to pass through.

[0010] By adopting the above technical solution, since the heat sink itself is symmetrically arranged, the heat sink can be placed upside down when assembled, and the mounting grooves on both sides are adapted to the bolts, and an inverted assembly is adopted. The nut of the bolt is set in the mounting groove, and the screw is passed through the mounting channel and the first connecting hole of the shell, and the nut is tightened from the outside of the shell, thereby fixing the heat sink and the mounting boss, and it is simpler and more convenient to disassemble and assemble the nut from the outside; a positioning boss is set, and the positioning boss increases the distance between the heat sink and the shell, further improving the heat dissipation performance and enhancing its safety performance.

[0011] The utility model is further configured that: the number of the first connecting holes is two.

[0012] By adopting the above technical solution, the stability of the connection is further enhanced.

[0013] The utility model is further provided with: the conductive sheet includes a first connecting section connected to the heat sink, a second connecting section extending out of the shell and a connecting portion connecting the first connecting section and the second connecting section; the first connecting hole is provided on the first connecting section and aligned with the mounting slot; the second connecting hole is provided on the second connecting section; the center line of the second connecting section is aligned with the center line of the interval of the heat sinks in the same group; the first connecting section, the second connecting section and the connecting portion are integrally formed and are at the same height.

[0014] By adopting the above technical solution, since each group of heat dissipation components has at least one input pin and one output pin, and the input pin and the output pin are respectively connected to the heat dissipation elements on both sides, the center line of the second connecting segment is aligned with the center line of the interval between the heat dissipation elements of the same group (that is, the middle of the interval between the heat dissipation elements on the left and right sides), and the conductive sheet is arranged in a Z-shape, then the second connecting segments on both sides are arranged in the middle of the heat dissipation component, and the height positions of the jacks at the front and rear ends of its shell are aligned, then the conductive sheets on the left and right sides can be used interchangeably, further improving processing efficiency and facilitating assembly.

[0015] The utility model is further provided with: a current detection transformer is also provided in the shell, the current detection transformer is provided with a mounting through hole adapted to the second connecting section, and the current detection transformer is sleeved on the second connecting section through the mounting through hole.

[0016] By adopting the above technical solution, compared with the existing soft starter using a transformer, the technical solution of the utility model uses a high-performance switching power supply built into the circuit board, so there is no need for a transformer. The current detection transformer is installed on the second connecting section through the mounting through hole. No additional fixed connection is required, and the sleeve is adopted, which is convenient and quick to assemble.

[0017] The utility model is further provided with: a socket is provided at a position of the shell corresponding to the second connecting section, a sleeve for protecting the second connecting section is provided in the socket, the sleeve includes an outer sleeve portion provided outside the shell and an inner sleeve portion inserted in the shell, clamping portions for fixing the sleeve are provided on both sides of the inner sleeve portion, the spacing between the inner sleeve portion and the connecting portion is adapted to the thickness of the current detection transformer, and the current detection transformer is clamped between the inner sleeve portion and the connecting portion.

[0018] By adopting the above technical solution, a sleeve is provided to further strengthen the protection of the conductive sheet, preventing dust and water vapor from entering the shell to form a conductive loop. The spacing between the inner sleeve and the connecting part is adapted to the thickness of the current detection transformer, which plays a positioning role and prevents the current detection transformer from sliding back and forth along the second connecting section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The internal structure of the utility model is partially three-dimensional Figure 1 .

[0020] Figure 2 The internal structure of the utility model is partially three-dimensional Figure 2 .

[0021] Figure 3 It is a three-dimensional diagram of the present utility model.

[0022] The meaning of the numbers in the figure: 1. Shell, 11. Jack, 2. Panel, 3. Heat dissipation assembly, 31. Heat dissipation part, 311. Mounting groove, 4. Thyristor, 5. Fastening assembly, 51. Bolt, 52. Nut, 6. Positioning boss, 7. Conductive sheet, 71. First connecting hole, 72. Second connecting hole, 73. First connecting section, 74. Second connecting section, 75. Connecting part, 8. Clamping sleeve, 81. Outer sleeve, 82. Inner sleeve, 83. Clamping part, 9. Current detection transformer, 91. Mounting through hole. DETAILED DESCRIPTION

[0023] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] Reference Attachment Figure 1-3 A soft starter that is easy to assemble includes a shell 1 and a panel 2. The shell 1 includes a heat dissipation component 3, a circuit board and a thyristor 4. The heat dissipation component 3 includes a heat dissipation member 31 clamped on both sides of the thyristor 4. The heat dissipation member 31 is provided with a mounting groove 311 on one side corresponding to the panel 2. The mounting groove 311 is open at least at one end. A fastening component 5 for connecting a conductive sheet 7 is slidably provided in the mounting groove 311. One end of the conductive sheet 7 is provided with a first connecting hole 71 that cooperates with the fastening component 5, and the other end extends out of the shell 1 and is provided with a second connecting hole 72. The conductive sheet 7 is integrally formed with the pin.

[0025] This embodiment is further configured as follows: the mounting groove 311 is configured in an inverted T shape, the fastening assembly 5 includes a bolt 51, the bolt 51 includes a nut inverted in the mounting groove 311 and a screw adapted to the first connecting hole 71, the screw passes through the first connecting hole 71 and is threadedly connected to a nut 52 arranged outside the heat sink 31.

[0026] This embodiment is further configured as follows: the heat sink 31 is symmetrically arranged on one side of the corresponding panel 2 and on one side of the inner wall of the shell 1, a positioning boss 6 is arranged between the other side of the heat sink 31 relative to the panel 2 and the inner wall of the shell 1, and a fastening component 5 for connecting the positioning boss 6 and the heat sink 31 is arranged in the mounting groove 311 on one side of the inner wall of the shell 1 of the heat sink 31. The fastening component 5 includes a bolt 51 with one end arranged in the mounting groove 311 and a nut 52 arranged outside the shell 1, and the positioning boss 6 is provided with a mounting channel for the bolt 51 to pass through.

[0027] This embodiment further provides that: the number of the first connecting holes 71 is two.

[0028] This embodiment is further configured as follows: the conductive sheet 7 includes a first connecting section 73 connected to the heat sink 31, a second connecting section 74 extending out of the shell 1, and a connecting portion 75 connecting the first connecting section 73 and the second connecting section 74. The first connecting hole 71 is provided on the first connecting section 73 and is aligned with the mounting groove 311. The second connecting hole 72 is provided on the second connecting section 74. The center line of the second connecting section 74 is aligned with the center line of the interval of the heat sink 31 of the same group. The first connecting section 73, the second connecting section 74 and the connecting portion 75 are integrally formed and are at the same height.

[0029] This embodiment is further configured as follows: a current detection transformer 9 is further provided in the shell 1, and the current detection transformer 9 is provided with a mounting through hole 91 adapted to the second connecting section 74, and the current detection transformer 9 is sleeved on the second connecting section 74 through the mounting through hole 91.

[0030] This embodiment is further configured as follows: a socket 11 is provided at a position of the shell 1 corresponding to the second connecting section 74, and a sleeve 8 for protecting the second connecting section 74 is provided in the socket 11. The sleeve 8 includes an outer sleeve 81 provided outside the shell 1 and an inner sleeve 82 inserted into the shell 1. Clamping portions 83 for fixing the sleeve 8 are provided on both sides of the inner sleeve 82. The spacing between the inner sleeve 82 and the connecting portion 75 is adapted to the thickness of the current detection transformer 9, and the current detection transformer 9 is clamped between the inner sleeve 82 and the connecting portion 75.

[0031] This embodiment further provides that: the positioning boss 6 is made of insulating material.

[0032] In the description of the present invention, it should be noted that the terms "left," "right," "inside," and "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components 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" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "between" does not simply refer to orientations or positions, but also includes the interaction between different parts.

[0033] Although this document frequently uses terms such as housing 1, jack 11, panel 2, heat sink assembly 3, heat sink 31, mounting slot 311, thyristor 4, fastening assembly 5, bolt 51, nut 52, positioning boss 6, conductive sheet 7, first connecting hole 71, second connecting hole 72, first connecting section 73, second connecting section 74, connecting portion 75, ferrule 8, outer sleeve 81, inner sleeve 82, ferrule 83, current sensing transformer 9, and mounting through-hole 91, the use of other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A soft starter that is easy to assemble, comprising a housing and a panel, wherein the housing includes a heat dissipation component, a circuit board, and a thyristor, characterized in that: The heat dissipation assembly includes heat dissipation parts clamped on both sides of the thyristor on the left and right sides, and a mounting groove is provided on one side of the heat dissipation part corresponding to the panel, and at least one end of the mounting groove is open. A fastening assembly for connecting the conductive sheet is slidably provided in the mounting groove, and a first connecting hole for matching with the fastening assembly is provided at one end of the conductive sheet, and the other end extends out of the shell and is provided with a second connecting hole.

2. The easy-to-assemble soft starter according to claim 1, characterized in that: The mounting slot is in an inverted T-shape, and the fastening assembly includes a bolt, which includes a nut inverted in the mounting slot and a screw rod adapted to the first connecting hole. The screw rod passes through the first connecting hole and is threadedly connected to a nut arranged outside the heat sink.

3. The easy-to-assemble soft starter according to claim 2, characterized in that: The heat sink is symmetrically arranged on one side of the corresponding panel and on one side of the corresponding shell inner wall. A positioning boss is arranged between the other side of the heat sink relative to the panel and the shell inner wall. A fastening assembly for connecting the positioning boss and the heat sink is arranged in the mounting groove on one side of the heat sink corresponding to the shell inner wall. The fastening assembly includes a bolt with one end arranged in the mounting groove and a nut arranged outside the shell. The positioning boss is provided with a mounting channel for the bolt to pass through.

4. The easy-to-assemble soft starter according to claim 1, characterized in that: The number of the first connecting holes is two.

5. The easy-to-assemble soft starter according to claim 1, characterized in that: The conductive sheet includes a first connecting section connected to the heat sink, a second connecting section extending out of the shell, and a connecting portion connecting the first connecting section and the second connecting section. The first connecting hole is provided on the first connecting section and is aligned with the mounting slot. The second connecting hole is provided on the second connecting section. The center line of the second connecting section is aligned with the center line of the interval of the heat sinks in the same group. The first connecting section, the second connecting section and the connecting portion are integrally formed and are at the same height.

6. The easy-to-assemble soft starter according to claim 5, characterized in that: A current detection transformer is further provided in the housing. The current detection transformer is provided with a mounting through hole adapted to the second connecting section. The current detection transformer is sleeved on the second connecting section through the mounting through hole.

7. The easy-to-assemble soft starter according to claim 6, characterized in that: The shell is provided with a socket at a position corresponding to the second connecting section, and a sleeve for protecting the second connecting section is provided in the socket. The sleeve includes an outer sleeve portion provided outside the shell and an inner sleeve portion inserted into the shell. Clamping portions for fixing the sleeve are provided on both sides of the inner sleeve portion. The spacing between the inner sleeve portion and the connecting portion is adapted to the thickness of the current detection transformer, and the current detection transformer is clamped between the inner sleeve portion and the connecting portion.

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