Terminal block for motor controller

Abstract

A terminal block for a motor controller disclosed by the present invention 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 installed 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. Pins of terminals, used for outputting control signals to the motor, on the wiring assembly penetrate through inner holes of the magnetic rings. The circuit design and size miniaturization of the controller are facilitated, the controller is convenient to produce and assemble, more space and cost are saved, the accuracy of signal receiving of the motor is guaranteed, and stable operation of equipment is guaranteed.

Description

Technical Field

[0001] The invention relates to a terminal block, in particular to a terminal block for a motor controller. Background Art

[0002] At present, in order to ensure the stability of the current output by the controller to the motor in a motor controller (such as a frequency converter), a magnetic ring device is set on the output circuit of the controller to suppress high-frequency noise, reduce electromagnetic interference, and ensure stable operation of the equipment.

[0003] In the prior art, the magnetic ring is installed on the output circuit in the controller, generally at the front end of the output terminal. The wiring terminal and the magnetic ring in the controller are two independent components installed on the circuit board and the output circuit in the controller. The two devices are required to realize the terminal output and anti-electromagnetic interference functions respectively. The production and assembly process of the controller is complicated, the two devices occupy a large space volume, and the production cost is relatively high. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the present invention provides a terminal block for a motor controller, which is conducive to the miniaturization of the controller design, and effectively simplifies the production process and reduces the production cost.

[0005] The technical solution adopted by the present invention to solve its technical problems 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 accommodating cavity is formed on the inner side of the plastic body, and a wire entry hole connected to the inner side of the wiring accommodating cavity is provided on the side wall of the plastic body, the wiring assembly is fixedly installed in the plastic body, and the wire entering through the wire entry hole on the plastic body can be clamped and positioned by the wiring assembly and connected to the terminal on the wiring assembly, and the pins of each terminal of the wiring assembly can extend out of the outside of one end of the plastic body respectively, and an inner groove structure is also provided on the side wall of one end of the plastic body, a magnetic ring is fixedly installed in the inner groove structure, and the pins of the terminals on the wiring assembly used to realize the controller outputting control signals to the motor pass through the inner hole of the magnetic ring.

[0006] As a further improvement of the present invention, at least one side wall of the inner groove structure forms a cantilever structure that can swing elastically, and an inverted stop boss is provided on the inner side surface of the side wall of the cantilever structure. The circumferential outer side wall of the magnetic ring is tightly attached to the inner side surface 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 at the bottom of the inner groove structure.

[0007] As a further improvement of the present invention, the inner groove structure side wall forms a cantilever structure in the following manner: two long opening gaps are opened on the inner groove structure side wall at intervals, and the part of the inner groove structure side wall located between the two opening gaps forms a cantilever structure that can swing elastically.

[0008] As a further improvement of the present invention, a plug groove connected to the inner groove structure is also provided on the side wall at one end of the plastic body, a plug block is inserted into the plug groove so as to be able to stop, and 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 surface of a side wall of the elastic cantilever on the inner groove structure facing away from the magnetic ring.

[0009] As a further improvement of the present invention, the plug block is fixedly inserted in the plug groove by interference fit, and the elastic part on the side wall of the plug block is an elastic support arm of a cantilever structure integrally formed on the side wall of the plug block, and the free end of the elastic support arm extends into the inner groove structure and tightly abuts against the surface of the magnetic ring.

[0010] As a further improvement of the present invention, the elastic supporting wall on the plug block 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 block.

[0011] As a further improvement of the present invention, a plurality of the plug grooves are arranged at intervals on the side wall at one end of the plastic body to form a row, and each plug groove is also connected to a plurality of wiring accommodating cavities one by one, and a side wall on the outer side of the plug block in the plug groove forms a side wall of the corresponding wiring accommodating cavity, and the bottom surface of the plug block forms a side wall of the wire entry hole connected to the corresponding wiring accommodating cavity.

[0012] As a further improvement of the present invention, two rows of wiring accommodating cavities arranged at intervals are formed in the plastic body, and the depth of one row of wiring accommodating cavities is less than the depth of another row of wiring accommodating cavities, and two rows of wire entry holes are formed on the side wall of the plastic body, and the two rows of wire entry holes are connected to the two rows of wiring accommodating cavities one-to-one, respectively. The wiring components are divided into two groups, and each group of wiring components is installed one-to-one in the two rows of wiring accommodating cavities, and the inner groove structure is arranged opposite to three adjacent wiring accommodating cavities in a row of wiring accommodating cavities, and the pins of the terminals of the wiring components located in the three adjacent wiring accommodating cavities extend out of the outside of one end of the plastic body through the inner groove structure.

[0013] As a further improvement of the present invention, the plastic body is also provided with an adjustment hole connected to the wiring accommodating cavity, and the wiring assembly includes a terminal, a movable clip and an adjusting screw. The terminal is in an L-shaped structure, one end of which forms a conductive plate fixedly installed in the wiring accommodating cavity, and the other end of the terminal is formed with a pin extending outward from the outside of one end of the plastic body. The movable clip in a frame-shaped structure can be installed in the wiring accommodating cavity for linear movement in a direction perpendicular to the conductive plate, and the movable clip is sleeved on the outside of the conductive plate at one end of the terminal. A screw hole is provided on a side wall of the movable clip parallel to the conductive plate of the terminal, and the stud of the adjusting screw is movably screwed in the screw hole. The adjusting screw is axially stopped and rotatable in a circumferential direction and is installed in the adjustment hole of the plastic body. Rotating the adjusting screw can drive the movable clip to move up and down, so that the other side wall of the movable clip parallel to the conductive plate of the terminal and the conductive plate jointly clamp or loosen the wire.

[0014] As a further improvement of the present invention, the wiring accommodating chamber is located at one end of the plastic body to form an open structure, the pin of the terminal extends out through the open structure, the adjustment hole is located at the other end of the plastic body, and a first inverted protrusion clamping point is provided on the side wall of the wiring accommodating chamber, and a second inverted protrusion clamping point is provided on the side wall of the other end of the terminal, the first inverted protrusion clamping point and the second inverted protrusion clamping point are symmetrically arranged up and down, the terminal can be inserted into the wiring accommodating chamber through the open structure of the wiring accommodating chamber, and the conductive plate at one end of the terminal is stopped at the bottom of the wiring accommodating chamber, the second inverted protrusion clamping point on the side wall of the other end of the terminal is stopped on the first inverted protrusion clamping point on the side wall of the wiring accommodating chamber and cannot escape toward the open structure of the wiring accommodating chamber, and the outer side surface of the conductive plate at one end of the terminal is tightly against the bottom side wall of the wiring accommodating chamber.

[0015] The beneficial effects of the present invention are as follows: the present invention forms an inner cavity for fixed installation of a magnetic ring in the plastic body of the terminal block, and the magnetic ring can be stably installed in the inner cavity of the plastic body of the terminal block, and is sleeved on the outer side of the output terminal pin on the terminal block for the controller to send a control signal to the motor, so as to reduce electromagnetic interference on the signal sent by the controller to the motor, ensure the accuracy of the signal received by the motor, and ensure the stable operation of the equipment. The present invention designs the wiring terminal and the magnetic ring as an integral device, which greatly facilitates the circuit design and miniaturization of the controller, and also facilitates the production and assembly of the controller, saving more space and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the assembly state of the present invention;

[0017] Figure 2 It is a three-dimensional cross-sectional view of the assembly state of the present invention;

[0018] Figure 3 It is a three-dimensional diagram of the terminal block and the magnetic ring of the present invention in an exploded state;

[0019] Figure 4 It is a three-dimensional cross-sectional view of the terminal block and the magnetic ring of the present invention in an exploded state;

[0020] Figure 5 It is a three-dimensional cross-sectional view of the exploded state of the present invention;

[0021] Figure 6 It is a schematic diagram of the assembly position of the plug block and the magnetic ring of the present invention;

[0022] Figure 7 A three-dimensional diagram of a plug block according to the present invention;

[0023] Figure 8 It is a three-dimensional diagram of the wiring assembly of the present invention. DETAILED DESCRIPTION

[0024] Embodiment: A terminal block for a motor controller includes a terminal block 120, wherein the terminal block 120 includes a plastic body 11 and a wiring assembly 12. A wiring accommodating cavity 111 is formed on the inner side of the plastic body 11. A wire entry hole 119 communicating with the inner side of the wiring accommodating cavity 111 is provided on the side wall of the plastic body 11. The wiring assembly 12 is fixedly installed in the plastic body 11. The wire entering through the wire entry hole 119 on the plastic body 11 can be clamped and positioned by the wiring assembly 12 and be connected to the terminal 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 respectively. 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 terminal 120 on the wiring assembly 12 for realizing the controller outputting a control signal 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 1 for fixing the magnetic ring 2, so that the pin of the terminal 120 on the wiring assembly 12 for realizing the controller outputting a control signal to the motor passes through the inner hole 21 of the magnetic ring, thereby effectively suppressing the high-frequency noise in the control signal output by the controller to the motor, reducing electromagnetic interference, and ensuring the stable operation of the equipment.

[0026] At least one side wall of the inner groove structure 113 forms a cantilever structure 115 that can swing elastically, and an inverted stop boss 116 is provided on the inner side surface of the side wall forming the cantilever structure 115. The outer circumferential wall of the magnetic ring 2 is tightly attached to the inner side surface of the inner groove structure 113 at one end of the plastic body, and one axial end of the magnetic ring 2 is stopped on the inverted stop boss 116, and the other axial end of the magnetic ring 2 is stopped on 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 positioned up and down by the inverted stop boss 116 and the stop surface 117 at the bottom of the inner groove structure 113, and two inverted stop bosses 116 are provided on the cantilever structure 115 at optimal intervals.

[0027] The side wall of the inner groove structure 113 forms the cantilever structure 115 in the following manner: two long opening gaps 114 are provided on the side wall of the inner groove structure 113 at intervals, and the portion of the side wall of the inner groove structure 113 between the two opening gaps 114 forms a cantilever structure 115 that can swing elastically.

[0028] A plug groove 112 communicating with the inner groove structure 113 is also provided on the side wall at one end of the plastic body 11, and a plug block 13 is inserted into the plug groove 112 so as to be stopperable. An elastic member is formed on the side wall of the plug block 13, and the elastic member can extend into the inner groove structure 113 and elastically press against the outer side surface of a 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 member and the side wall of the inner groove structure 113 fixes the magnetic ring 2 in the plastic body 11 without gaps, so as to avoid vibration of the magnetic ring 2 when the controller is running.

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

[0030] The elastic supporting 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 conducive to the assembly of the magnetic ring 2.

[0031] A plurality of the plug grooves 112 are arranged at intervals on the side wall at one end of the plastic body 11 to form a row, and each plug groove 112 is also connected to a plurality of wiring accommodating chambers 111 one by one. A side wall of the outer side of the plug block 13 in the plug groove 112 forms a side wall of the corresponding wiring accommodating chamber 111, and a bottom surface of the plug block 13 forms a side wall of the wire entry hole 119 connected to the corresponding wiring accommodating chamber.

[0032] The plastic body 11 is formed with two rows of wiring accommodating cavities 111 arranged at intervals, and the depth of one row of wiring accommodating cavities 111 is less than the depth of another row of wiring accommodating cavities 111. Two rows of wire entry holes 119 are formed on the side wall of the plastic body 11. The two rows of wire entry holes 119 are connected to the two rows of wiring accommodating cavities 111 in a one-to-one correspondence. The wiring components 12 are divided into two groups, and each group of wiring components 12 is installed in the two rows of wiring accommodating cavities 111 in a one-to-one correspondence. The inner groove structure 113 is arranged opposite to three adjacent wiring accommodating cavities 111 in a row of wiring accommodating cavities. The pins of the terminals 120 of the wiring components 12 located in the three adjacent wiring accommodating cavities 111 extend out of the outside of one end of the plastic body through the inner groove structure 113. The wiring components 12 are installed in the two rows of wiring accommodating cavities respectively, so that more circuits can be connected. The depths of the two rows of wiring accommodating cavities are different, and a step structure can be formed on the plastic body 11 to achieve line avoidance.

[0033] The plastic body 11 is also provided with an adjustment hole 118 connected to the wiring accommodating cavity 111. The wiring assembly 12 includes a terminal 120, a movable clip 122 and an adjustment screw 123. The terminal 120 is an L-shaped structure, one end of which forms a conductive plate 124 fixedly installed in the wiring accommodating cavity 111, and the end of the other end is formed with a pin extending outward from one end of the plastic body 11. The movable clip 122 in a frame-shaped structure can be installed in the wiring accommodating cavity 111 in a straight line along a direction perpendicular to the conductive plate 124, and the movable clip 122 is sleeved on the terminal. On the outer side of the conductive plate 124 at one end of the terminal 120, a screw hole is provided on a side wall of the movable clip 122 parallel to the conductive plate 124 of the terminal 120, and the stud of the adjusting screw 123 is movably screwed into the screw hole. The adjusting screw 123 is axially fixed and rotatable in the circumferential direction and is installed in the adjusting hole 118 of the plastic body 11. Rotating the adjusting screw 123 can drive the movable clip 122 to move up and down, thereby making the movable clip 122 and the other side wall parallel to the conductive plate 124 of the terminal 120 and the conductive plate 124 clamp or loosen the wire together. By rotating the adjusting screw 123, the movable clip 122 is driven to move up and down, thereby clamping or loosening the wire together with the conductive plate 124 on the terminal 120, so as to realize the wire entry and withdrawal.

[0034] The wiring accommodating cavity 111 is located at one end of the plastic body 11 to form an open structure, and the pin of the terminal 120 extends out through the open structure. The adjusting hole 118 is located at the other end of the plastic body 11. A first inverted convex clamping point 1111 is further provided on the side wall of the wiring accommodating cavity 111, and a second inverted convex clamping point 1201 is provided on the side wall of the other end of the terminal 120. The first inverted convex clamping point 1111 and the second inverted convex clamping point 1201 are symmetrically arranged up and down, and the terminal 120 can The terminal 120 is inserted into the wiring accommodating cavity 111 through the open structure of the wiring accommodating cavity 111, and the conductive plate 124 at one end of the terminal 120 is stopped at the bottom of the wiring accommodating cavity 111, and the second inverted protrusion 1201 on the side wall of the other end of the terminal 120 is stopped on the first inverted protrusion 1111 on the side wall of the wiring accommodating cavity 111 and cannot escape toward the open structure of the wiring accommodating cavity 111, and the outer side surface of the conductive plate 124 at one end of the terminal 120 is tightly against the bottom side wall of the wiring accommodating cavity 111.

Claims

1. A terminal block for a motor controller, comprising a terminal block (1), the terminal block comprising a plastic body (11) and a wiring assembly (12), a wiring accommodating cavity (111) being formed inside the plastic body, a wire entry hole (119) communicating with the inside of the wiring accommodating cavity being provided on a side wall of the plastic body, the wiring assembly being fixedly installed in the plastic body, a wire entering through the wire entry hole on the plastic body being clamped and positioned by the wiring assembly and being connected to a terminal on the wiring assembly, and pins of each terminal of the wiring assembly being able to extend outward from one end of the plastic body, the terminal block being characterized in that: An inner groove structure (113) is also provided on the side wall at one end of the plastic body, a magnetic ring (2) is fixedly installed in the inner groove structure, and a pin of a terminal on the wiring assembly for realizing the controller outputting a 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) capable of elastic swinging, and an inverted stop boss (116) is provided on the inner side surface of the side wall of the cantilever structure, and the outer circumferential wall of the magnetic ring is tightly attached to the inner side surface 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 a 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 inner groove structure side wall forms a cantilever structure in the following manner: two long opening gaps (114) are provided on the inner groove structure side wall at intervals, and the portion of the inner groove structure side wall located between the two opening gaps forms a cantilever structure capable of elastic swinging.

4. The terminal block for a motor controller according to claim 2, characterized in that: A plug groove (112) communicating with the inner groove structure is also provided on the side wall at one end of the plastic body, a plug block (13) is inserted into the plug groove so as to be stopperable, 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 surface of a side wall of the elastic cantilever on the magnetic ring facing away from the inner groove structure.

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

7. The terminal block for a motor controller according to claim 4, characterized in that: A plurality of the plug grooves are arranged at intervals on the side wall at one end of the plastic body to form a row, and each plug groove is also connected to a plurality of wiring accommodating cavities one by one. A side wall on the outer side of the plug block in the plug groove forms a side wall of the corresponding wiring accommodating cavity, and the bottom surface of the plug block forms a side wall of the wire entry hole connected to the corresponding wiring accommodating cavity.

8. The terminal block for a motor controller according to claim 1, characterized in that: Two rows of wiring accommodating cavities arranged at intervals are formed in the plastic body, and the depth of one row of wiring accommodating cavities is less than the depth of another row of wiring accommodating cavities. Two rows of wire entry holes are formed on the side wall of the plastic body, and the two rows of wire entry holes are connected to the two rows of wiring accommodating cavities in a one-to-one correspondence. The wiring components are divided into two groups, and each group of wiring components is installed in the two rows of wiring accommodating cavities in a one-to-one correspondence. The inner groove structure is arranged opposite to three adjacent wiring accommodating cavities in a row of wiring accommodating cavities, and the pins of the terminals of the wiring components located in the three adjacent wiring accommodating cavities extend out of the outside 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) connected to the wiring accommodating cavity. The wiring assembly includes a terminal (120), a movable clip (122) and an adjustment screw (123). The terminal is L-shaped, one end of which forms a conductive plate (124) fixedly installed in the wiring accommodating cavity, and the other end of the terminal is formed with a pin extending outward from one end of the plastic body. The movable clip in a frame-shaped structure can be installed in the wiring accommodating cavity in a straight line along a direction perpendicular to the conductive plate, and the movable clip is sleeved on the outside of the conductive plate at one end of the terminal. A screw hole is provided on a side wall of the movable clip parallel to the conductive plate of the terminal, and the stud of the adjustment screw is movably screwed into the screw hole. The adjustment screw is axially stopped and rotatable in the circumferential direction and is installed in the adjustment hole of the plastic body. Rotating the adjustment screw can drive the movable clip to move up and down, thereby making the other side wall of the movable clip parallel to the conductive plate of the terminal and the conductive plate clamp or loosen the wire together.

10. The terminal block for a motor controller according to claim 9, characterized in that: The wiring accommodating chamber is located at one end of the plastic body to form an open structure, the pin of the terminal extends out through the open structure, the adjustment hole is located at the other end of the plastic body, a first inverted protrusion clamping point (1111) is also provided on the side wall of the wiring accommodating chamber, and a second inverted protrusion clamping point (1201) is provided on the side wall of the other end of the terminal, the first inverted protrusion clamping point and the second inverted protrusion clamping point are symmetrically arranged up and down, the terminal can be inserted into the wiring accommodating chamber through the open structure of the wiring accommodating chamber, and the conductive plate at one end of the terminal is stopped at the bottom of the wiring accommodating chamber, the second inverted protrusion clamping point on the side wall of the other end of the terminal is stopped on the first inverted protrusion clamping point on the side wall of the wiring accommodating chamber and cannot escape in the direction of the open structure of the wiring accommodating chamber, and the outer side surface of the conductive plate at one end of the terminal is tightly against the bottom side wall of the wiring accommodating chamber.

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