Terminal block for motor controller

Abstract

The utility model discloses a terminal block for a motor controller, which comprises a wiring terminal block, the wiring terminal block comprises a plastic main body and a wiring assembly, the inner side of the plastic main body is provided with a wiring accommodating cavity, the side wall of the plastic main body is provided with a wire inlet hole communicated with the inner side of the wiring accommodating cavity, and the wiring assembly is fixedly arranged in the plastic main body. A wire entering through a wire inlet hole in the plastic body can be clamped and positioned by the wiring assembly and conducted with terminals on the wiring assembly, pins of all the terminals of the wiring assembly can stretch out of the outer side of one end of the plastic body, an inner groove structure is further arranged on the side wall of one end of the plastic body, and a magnetic ring is fixedly installed in the inner groove structure. According to the utility model, the circuit design and the size miniaturization of the controller are facilitated, the production and the assembly of the controller are convenient, more space and cost are saved, the accuracy of the signal received by the motor is ensured, and the stable operation of equipment is ensured.

Description

Technical Field

[0001] This utility model relates to a terminal block, and more particularly to a terminal block for a motor controller. Background Technology

[0002] Currently, in order to ensure the stability of the current output from the controller to the motor in motor controllers (such as frequency converters), magnetic ring devices are installed in the output circuit of the controller to suppress high-frequency noise, reduce electromagnetic interference, and ensure the stable operation of the equipment.

[0003] In the existing technology, the magnetic ring is installed on the output circuit inside the controller, usually at the front end of the output terminal. The wiring terminal and the magnetic ring are two independent components installed on the circuit board and output circuit inside the controller. The two components are required to realize the terminal output and the function of electromagnetic interference suppression respectively. The controller manufacturing and assembly process is complicated, the two components occupy a large space volume, and the production cost is relatively high. Utility Model Content

[0004] To overcome the above-mentioned defects, this utility model provides a terminal block for a motor controller, which facilitates the miniaturization of controller design, effectively simplifies the production process, and reduces production costs.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a terminal block for a motor controller, including a wiring terminal block, the wiring terminal block including a plastic body and a wiring assembly, a wiring receiving cavity formed on the inner side of the plastic body, an inlet hole communicating with the inner side of the wiring receiving cavity on the side wall of the plastic body, the wiring assembly being fixedly installed in the plastic body, the wire entering through the inlet hole on the plastic body being clamped and positioned by the wiring assembly and communicating with the terminals on the wiring assembly, the pins of each terminal of the wiring assembly being able to extend out of the outer side of one end of the plastic body, an inner groove structure being provided on the side wall of one end of the plastic body, a magnetic ring being fixedly installed in the inner groove structure, the pins of the terminals on the wiring assembly used to realize the controller output control signals to the motor passing through the inner hole of the magnetic ring.

[0006] As a further improvement of this utility model, at least one side wall of the inner groove structure forms a cantilever structure that can swing elastically. An inverted stop protrusion is provided on the inner side of the side wall forming the cantilever structure. The outer circumferential wall of the magnetic ring is closely attached to the inner side of the inner groove structure at one end of the plastic body. One axial end of the magnetic ring stops on the inverted stop protrusion, and the other axial end of the magnetic ring stops on the stop surface at the bottom of the inner groove structure.

[0007] As a further improvement of this utility model, the cantilever structure is formed by opening two long strip openings at intervals on the side wall of the inner groove structure, and the part of the side wall of the inner groove structure located between the two openings forms a cantilever structure that can swing elastically.

[0008] As a further improvement of this utility model, a plug groove communicating with the inner groove structure is provided on one side wall of the plastic body. A plug block is inserted into the plug groove and can be stopped. An elastic member is formed on the side wall of the plug block. The elastic member can extend into the inner groove structure and elastically press against the outer side of the side wall of the magnetic ring facing away from the elastic cantilever on the inner groove structure.

[0009] As a further improvement of this utility model, the plug is fixedly inserted into the plug groove by an interference fit, and the elastic element on the side wall of the plug is an elastic support arm with a cantilever structure integrally formed from the side wall of the plug. The free end of the elastic support arm extends into the inner groove structure and abuts against the surface of the magnetic ring.

[0010] As a further improvement of this utility model, the elastic support wall on the plug extends obliquely from the opening end of the inner groove structure toward the bottom of the inner groove structure on the side wall of the plug.

[0011] As a further improvement of this utility model, a number of the plug grooves are arranged in a row at intervals on one side wall of the plastic body, and each plug groove is also connected to a number of wiring receiving cavities one by one. The side wall of the plug block inside the plug groove forms the side wall of the corresponding wiring receiving cavity, and the bottom surface of the plug block forms the side wall of the inlet hole that communicates with the corresponding wiring receiving cavity.

[0012] As a further improvement of this utility model, two rows of spaced-apart wiring cavities are formed inside the plastic body, and the depth of one row of wiring cavities is less than the depth of the other row of wiring cavities. Two rows of spaced-apart wire inlets are formed on the side wall of the plastic body, and the two rows of wire inlets are respectively connected to the two rows of wiring cavities. The wiring assemblies are in two sets, and each set of wiring assemblies is installed in the two rows of wiring cavities. The inner groove structure is directly opposite to three adjacent wiring cavities in one row of wiring cavities. The pins of the terminals of the wiring assemblies located in the three adjacent wiring cavities extend out of the outer side of one end of the plastic body through the inner groove structure.

[0013] As a further improvement of this utility model, the plastic body is also provided with an adjustment hole communicating with the wiring receiving cavity. The wiring assembly includes a terminal, a movable clip, and an adjustment screw. The terminal has an L-shaped structure, with one end forming a conductive plate fixedly installed in the wiring receiving cavity, and the other end forming a pin extending out of the outer side of one end of the plastic body. The frame-shaped movable clip can be linearly moved along the direction perpendicular to the conductive plate and installed in the wiring receiving cavity. The movable clip is sleeved on the outer side of the conductive plate at one end of the terminal. A screw hole is provided on the side wall of the movable clip parallel to the conductive plate of the terminal. The stud of the adjustment screw is movably screwed into the screw hole. The adjustment screw is axially stopped and circumferentially rotatable and installed in the adjustment hole of the plastic body. Rotating the adjustment screw can drive the movable clip to move up and down, thereby causing the other side wall of the movable clip parallel to the conductive plate of the terminal and the conductive plate to clamp or release the wire together.

[0014] As a further improvement of this utility model, the wiring receiving cavity is located at one end of the plastic body and forms an open structure. The pins of the terminal extend through the open structure. The adjustment hole is located at the other end of the plastic body. The side wall of the wiring receiving cavity is also provided with a first inverted protruding locking point. The other side wall of the terminal is provided with a second inverted protruding locking point. The first inverted protruding locking point and the second inverted protruding locking point are symmetrically arranged vertically. The terminal can be inserted into the wiring receiving cavity through the open structure of the wiring receiving cavity. The conductive plate at one end of the terminal stops at the bottom of the wiring receiving cavity. The second inverted protruding locking point on the side wall of the other end of the terminal stops at the first inverted protruding locking point on the side wall of the wiring receiving cavity and cannot be dislodged towards the open structure of the wiring receiving cavity. The outer side of the conductive plate at one end of the terminal is tightly pressed against the bottom side wall of the wiring receiving cavity.

[0015] The beneficial effects of this utility model are as follows: By forming an inner cavity within the plastic body of the terminal block for the fixed installation of the magnetic ring, the magnetic ring can be stably installed in the inner cavity of the plastic body of the terminal block and sleeved on the outside of the output terminal pins of the terminal block used by the controller to send control signals to the motor. This reduces electromagnetic interference to the signals sent by the controller to the motor, ensures the accuracy of the motor receiving signals, and ensures the stable operation of the equipment. This utility model designs the wiring terminal and the magnetic ring as an integrated device, which greatly facilitates the circuit design and miniaturization of the controller, facilitates the production and assembly of the controller, and saves space and cost. Attached Figure Description

[0016] Figure 1 This is a perspective view of the assembled state of this utility model;

[0017] Figure 2 This is a three-dimensional sectional view of the assembled state of this utility model;

[0018] Figure 3This is an exploded perspective view of the terminal block and magnetic ring of this utility model.

[0019] Figure 4 This is an exploded perspective sectional view of the terminal block and magnetic ring of this utility model.

[0020] Figure 5 This is an exploded perspective sectional view of the present invention.

[0021] Figure 6 This is a schematic diagram showing the assembly positions of the plug and magnetic ring of this utility model;

[0022] Figure 7 This is a perspective view of the plug block of this utility model;

[0023] Figure 8 This is a perspective view of the wiring assembly of this utility model. Detailed Implementation

[0024] Example: A terminal block for a motor controller includes a terminal block 120 1. The terminal block 120 1 includes a plastic body 11 and a wiring assembly 12. A wiring receiving cavity 111 is formed inside the plastic body 11. An inlet hole 119 communicating with the inside of the wiring receiving cavity 111 is provided on the side wall of the plastic body 11. The wiring assembly 12 is fixedly installed inside the plastic body 11. The wires entering through the inlet hole 119 on the plastic body 11 can be clamped and positioned by the wiring assembly 12 and connected to the terminals 120 on the wiring assembly 12. The pins of each terminal 120 of the wiring assembly 12 can extend out of the outer side of one end of the plastic body. An inner groove structure 113 is also provided on the side wall of one end of the plastic body. A magnetic ring 2 is fixedly installed in the inner groove structure 113. The pins of the terminals 120 on the wiring assembly 12 used to realize the controller outputs control signals to the motor pass through the inner hole 21 of the magnetic ring.

[0025] An inner groove structure 113 is formed at one end of the plastic body 11 of the terminal block 120 to fix and install the magnetic ring 2, so that the pin of the terminal 120 on the wiring assembly 12 used to realize the controller to output control signal to the motor passes through the inner hole 21 of the magnetic ring, thereby effectively suppressing high-frequency noise in the controller output control signal to the motor, reducing electromagnetic interference, and ensuring stable operation of the equipment.

[0026] At least one sidewall of the inner groove structure 113 forms a cantilever structure 115 capable of elastic swinging. An inverted stop protrusion 116 is provided on the inner sidewall of the cantilever structure 115. The outer circumferential wall of the magnetic ring 2 is tightly attached to the inner sidewall of the inner groove structure 113 at one end of the plastic body. One axial end of the magnetic ring 2 is stopped by the inverted stop protrusion 116, and the other axial end is stopped by the stop surface 117 at the bottom of the inner groove structure 113. The magnetic ring 2 is installed in the inner groove structure 113 and is vertically positioned by the inverted stop protrusion 116 and the stop surface 117 at the bottom of the inner groove structure 113. Two inverted stop protrusions 116 are optimally spaced on the cantilever structure 115.

[0027] The cantilever structure 115 is formed by opening two long strip openings 114 at intervals on the side wall of the inner groove structure 113, and the part of the side wall of the inner groove structure 113 located between the two openings 114 forms a cantilever structure 115 that can swing elastically.

[0028] The plastic body 11 also has a groove 112 on one side wall that communicates with the inner groove structure 113. A plug block 13 is inserted into the groove 112 and can be stopped. An elastic element is formed on the side wall of the plug block 13. The elastic element can extend into the inner groove structure 113 and elastically press against the outer side of the side wall of the magnetic ring 2 facing away from the elastic cantilever on the inner groove structure 113. The cantilever structure 115 formed by the elastic element and the side wall of the inner groove structure 113 fixes the magnetic ring 2 in the plastic body 11 without gaps, avoiding vibration of the magnetic ring 2 when the controller is running.

[0029] The plug 13 is fixedly inserted into the plug groove 112 by an interference fit. The elastic element on the side wall of the plug 13 is an elastic support arm 131 of a cantilever structure 115 integrally formed from the side wall of the plug 13. The free end of the elastic support arm 131 extends into the inner groove structure 113 and abuts against the surface of the magnetic ring 2. The elastic element is integrally formed on the side wall of the plug 13, which has low manufacturing cost and is convenient for molding and assembly. In addition, the elastic element can also be a spring assembled on the side wall of the plug 13.

[0030] The elastic support wall on the plug 13 extends obliquely from the opening end of the inner groove structure 113 toward the bottom of the inner groove structure 113 on the side wall of the plug 13. This structure is beneficial for the assembly of the magnetic ring 2.

[0031] A number of the aforementioned grooves 112 are arranged in a row at intervals on one side wall of the plastic body 11. Each groove 112 is also connected to a number of wiring receiving cavities 111 one by one. The side wall of the plug 13 inside the groove 112 forms the side wall of the corresponding wiring receiving cavity 111. The bottom surface of the plug 13 forms the side wall of the inlet hole 119 that communicates with the corresponding wiring receiving cavity.

[0032] The plastic body 11 has two rows of spaced-apart wiring accommodating cavities 111, with the depth of one row of cavities less than the depth of the other. Two rows of spaced-apart wire inlet holes 119 are formed on the sidewall of the plastic body 11, each row communicating with one of the two rows of wiring accommodating cavities 111. Two sets of wiring assemblies 12 are installed in each of the two rows of wiring accommodating cavities 111. The inner groove structure 113 is positioned opposite three adjacent wiring accommodating cavities 111 in one row. The pins of the terminals 120 of the wiring assemblies 12 located in these three adjacent cavities extend outwards from one end of the plastic body through the inner groove structure 113. The wiring assemblies 12 are installed in the two rows of wiring accommodating cavities, allowing for more circuit connections. The different depths of the two rows of cavities allow for a stepped structure to be formed on the plastic body 11, facilitating wire avoidance.

[0033] The plastic body 11 is also provided with an adjustment hole 118 communicating with the wiring receiving cavity 111. The wiring assembly 12 includes a terminal 120, a movable clip 122, and an adjustment screw 123. The terminal 120 has an L-shaped structure, with one end forming a conductive plate 124 fixedly installed in the wiring receiving cavity 111, and the other end forming a pin extending out of the outer side of one end of the plastic body 11. The frame-shaped movable clip 122 can be linearly moved along the direction perpendicular to the conductive plate 124 and installed in the wiring receiving cavity 111, and the movable clip 122 is sleeved on the terminal. On the outer side of the conductive plate 124 at one end of terminal 120, a screw hole is provided on the side wall of the movable clamping piece 122 parallel to the conductive plate 124 of terminal 120. The stud of the adjusting screw 123 is movably screwed into the screw hole. The adjusting screw 123 is axially stopped and circumferentially rotatable, installed in the adjusting hole 118 of the plastic body 11. Rotating the adjusting screw 123 can drive the movable clamping piece 122 to move up and down, thereby causing the other side wall of the movable clamping piece 122 parallel to the conductive plate 124 of terminal 120 to clamp or release the wire together with the conductive plate 124. By rotating the adjusting screw 123 to drive the movable clamping piece 122 to move up and down, it clamps or releases the wire together with the conductive plate 124 on terminal 120, realizing wire feeding and wire unloading.

[0034] The wiring receiving cavity 111 is located at one end of the plastic body 11, forming an open structure. The pins of the terminal 120 extend through the open structure. The adjustment hole 118 is located at the other end of the plastic body 11. The side wall of the wiring receiving cavity 111 is also provided with a first inverted protruding locking point 1111, and the side wall of the other end of the terminal 120 is provided with a second inverted protruding locking point 1201. The first inverted protruding locking point 1111 and the second inverted protruding locking point 1201 are symmetrically arranged vertically, allowing the terminal 120 to... The terminal 120 is inserted into the wiring receiving cavity 111 through the open structure of the wiring receiving cavity 111. The conductive plate 124 at one end of the terminal 120 is stopped at the bottom of the wiring receiving cavity 111. The second inverted protrusion 1201 on the side wall of the other end of the terminal 120 is stopped by the first inverted protrusion 1111 on the side wall of the wiring receiving cavity 111 and cannot be dislodged towards the open structure of the wiring receiving cavity 111. The outer side of the conductive plate 124 at one end of the terminal 120 is tightly pressed against the bottom side wall of the wiring receiving cavity 111.

Claims

1. A terminal block for a motor controller, comprising a wiring terminal block (1), the wiring terminal block comprising a plastic body (11) and a wiring assembly (12), wherein a wiring receiving cavity (111) is formed on the inner side of the plastic body, and an inlet hole (119) communicating with the inner side of the wiring receiving cavity is provided on the side wall of the plastic body, the wiring assembly is fixedly installed in the plastic body, and a wire entering through the inlet hole on the plastic body can be clamped and positioned by the wiring assembly and connected to the terminals on the wiring assembly, wherein the pins of each terminal of the wiring assembly can extend out of the outer side of one end of the plastic body, characterized in that: The plastic body is provided with an inner groove structure (113) on one side wall. A magnetic ring (2) is fixedly installed in the inner groove structure. The pin of the terminal on the wiring assembly used to realize the controller to output control signal to the motor passes through the inner hole (21) of the magnetic ring.

2. The terminal block for a motor controller according to claim 1, characterized in that: At least one side wall of the inner groove structure forms a cantilever structure (115) that can swing elastically. An inverted stop boss (116) is provided on the inner side of the side wall forming the cantilever structure. The outer circumferential wall of the magnetic ring is closely attached to the inner side of the inner groove structure at one end of the plastic body. One axial end of the magnetic ring stops on the inverted stop boss, and the other axial end of the magnetic ring stops on the stop surface (117) at the bottom of the inner groove structure.

3. The terminal block for a motor controller according to claim 2, characterized in that: The cantilever structure is formed by opening two long strip openings (114) at intervals on the side wall of the inner groove structure, and the part of the side wall of the inner groove structure located between the two openings forms a cantilever structure that can swing elastically.

4. The terminal block for a motor controller according to claim 2, characterized in that: The plastic body is provided with a plug groove (112) on one side wall that communicates with the inner groove structure. A plug block (13) is inserted into the plug groove and can be stopped. An elastic element is formed on the side wall of the plug block. The elastic element can extend into the inner groove structure and elastically press against the outer side of the side wall of the magnetic ring facing away from the elastic cantilever on the inner groove structure.

5. The terminal block for a motor controller according to claim 4, characterized in that: The plug is fixedly inserted into the plug groove by an interference fit. The elastic element on the side wall of the plug is an elastic support arm (131) with a cantilever structure integrally formed from the side wall of the plug. The free end of the elastic support arm extends into the inner groove structure and abuts against the surface of the magnetic ring.

6. The terminal block for a motor controller according to claim 5, characterized in that: The elastic support wall on the plug extends obliquely from the opening end of the inner groove structure toward the bottom of the inner groove structure on the side wall of the plug.

7. The terminal block for a motor controller according to claim 4, characterized in that: Several of the aforementioned grooves are arranged in a row at intervals on one side wall of the plastic body. Each groove is also connected to several wiring accommodating cavities one by one. The side wall of the plug block inside the groove forms the side wall of the corresponding wiring accommodating cavity, and the bottom surface of the plug block forms the side wall of the inlet hole that communicates with the corresponding wiring accommodating cavity.

8. The terminal block for a motor controller according to claim 1, characterized in that: The plastic body has two rows of spaced-apart wiring cavities, with the depth of one row of wiring cavities being less than the depth of the other row. The sidewall of the plastic body has two rows of spaced-apart inlet holes, which are connected to the two rows of wiring cavities respectively. The wiring assemblies are in two sets, with each set of wiring assemblies installed in the two rows of wiring cavities respectively. The inner groove structure is directly opposite to three adjacent wiring cavities in one row of wiring cavities. The pins of the terminals of the wiring assemblies located in the three adjacent wiring cavities extend out of the outer side of one end of the plastic body through the inner groove structure.

9. The terminal block for a motor controller according to claim 1 or 2, characterized in that: The plastic body is also provided with an adjustment hole (118) communicating with the wiring cavity. The wiring assembly includes a terminal (120), a movable clip (122), and an adjustment screw (123). The terminal has an L-shaped structure, with one end forming a conductive plate (124) fixedly installed in the wiring cavity, and the other end forming a pin extending out of the outer side of one end of the plastic body. The frame-shaped movable clip can be linearly moved in the direction perpendicular to the conductive plate and installed in the wiring cavity. The movable clip is sleeved on the outer side of the conductive plate at one end of the terminal. A screw hole is provided on the side wall of the movable clip parallel to the conductive plate of the terminal. The stud of the adjustment screw is movably screwed into the screw hole. The adjustment screw is axially stopped and circumferentially rotatable and installed in the adjustment hole of the plastic body. Rotating the adjustment screw can drive the movable clip to move up and down, thereby causing the other side wall of the movable clip parallel to the conductive plate of the terminal to clamp or loosen the wire together with the conductive plate.

10. The terminal block for a motor controller according to claim 9, characterized in that: The wiring receiving cavity is located at one end of the plastic body and forms an open structure. The pins of the terminal extend through the open structure. The adjustment hole is located at the other end of the plastic body. The side wall of the wiring receiving cavity is also provided with a first inverted protruding locking point (1111). The other side wall of the terminal is provided with a second inverted protruding locking point (1201). The first inverted protruding locking point and the second inverted protruding locking point are symmetrically arranged vertically. The terminal can be inserted into the wiring receiving cavity through the open structure of the wiring receiving cavity. The conductive plate at one end of the terminal is stopped at the bottom of the wiring receiving cavity. The second inverted protruding locking point on the side wall of the other end of the terminal is stopped by the first inverted protruding locking point on the side wall of the wiring receiving cavity and cannot be dislodged towards the open structure of the wiring receiving cavity. The outer side of the conductive plate at one end of the terminal is tightly pressed against the bottom side wall of the wiring receiving cavity.

Images