Output terminal structure of a motor controller

Abstract

The present invention discloses an output end structure of a motor controller, comprising a fixing column on a base cover and a bolt hole on a base body, wherein the fixing column is connected to an output end of a conductor sheet arranged in the base cover, and the output end of the conductor sheet is sleeved on the fixing column, and an external wire connected to the positive electrode of a controller chip is sleeved on the fixing column to realize the connection and fixation of the external wire with the conductor sheet, a fixing ring is arranged at the bottom end of the fixing column and the fixing ring is wrapped by the base cover so that the outside of the fixing ring is insulated, and the position of the fixing ring corresponds to the bolt hole on the base body, and a bolt passes through the fixing ring and is connected with the bolt hole to realize the fixation of the middle part of the fixing ring with the base cover, and the bottom thereof is fixed to the base body by a bolt and is insulated from each other. The present invention has a simple processing technology, is convenient to install, has strong versatility, and has higher stability.

Description

Technical Field

[0001] The invention relates to an output terminal structure of a motor controller and belongs to the field of motor drive applications. Background Art

[0002] In the prior art, during the driving process of a servo motor (generally a three-phase AC motor, or two three-phase AC motors, forming six input terminals), a controller is provided between the servo motor and the driving end to rectify the output of the servo motor and control the power or output on / off.

[0003] Some existing simple controllers (or PS machines) can only rectify the servo motor. Its structure includes two substrates, which are cast as a whole with metal materials. The two substrates are insulated from each other. One substrate is grounded, and the other substrate is provided with a rectifier bridge control element composed of a diode. The negative end of the control element is connected to the grounded substrate, and the positive electrode of the control element (conductor sheet structure) is also connected to the external wire through the connecting column on the corresponding substrate. In order to ensure that the positive electrode of the control element is stably connected to the external wire on the connecting column, it is necessary to put a nut on the connecting column and use a torque (the torque size refers to the existing technical standards) to tighten the control element. The positive pole of the component is tightly attached to the connection end of the external wire, so the connecting column must be fixed to the basic connection (that is, the connecting column cannot be displaced up and down or offset left and right). However, the material of the connecting column and the base on which the control component is provided are inconsistent (considering the casting process, the material itself and the assembly cost), making it difficult for the fixing method between the connecting column and the base to overcome the effect of the above-mentioned torque (the existing technology generally fixes the connecting column to the base through the through hole on the base by rivets), which can easily cause the connection between the connection and the base to loosen or offset due to vibration or other external factors in the later stage, thereby causing the connection between the control component and the external wire to be unstable, and thus failing to control the servo motor normally. Summary of the Invention

[0004] The purpose of the present invention is to provide an output terminal structure of a motor controller, which solves the problem of unstable and unreliable connection at the output terminal of a power electronic device by creatively changing the structure of the output terminal, thereby overcoming the shortcomings of the existing technology.

[0005] An output terminal structure of a motor controller includes a fixing column on a base cover and a bolt hole on a base body;

[0006] The fixing post is connected to the output end of the conductor sheet provided in the base cover, the output end of the conductor sheet is sleeved on the fixing post, and the external wire connected to the positive electrode of the controller chip is sleeved on the fixing post to achieve the connection and fixation of the external wire and the conductor sheet;

[0007] A fixing ring is set at the bottom end of the fixing column and the fixing ring is wrapped by the base cover so that the outside of the fixing ring is insulated. The position of the fixing ring corresponds to the bolt hole on the base. Bolt 1 passes through the fixing ring and is connected with the bolt hole to fix the middle part of the fixing ring to the base cover, and its bottom is fixed to the base by bolt 1 and insulated from each other.

[0008] Preferably, the upper portion of the fixing post is a threaded structure, and the nut cooperates with the fixing post so that the conductive sheet sleeved on the fixing post and the external wire are in stable contact with each other.

[0009] Preferably, a supporting circular plate is provided at the lower portion of the fixing column, and the supporting circular plate is entirely embedded in the base cover with the upper surface exposed.

[0010] Preferably, the upper surface of the supporting circular plate is higher than the upper surface of the base cover around it.

[0011] Preferably, a sleeve is provided in the hollow position in the middle of the fixing ring, and the sleeve is embedded in the base cover around the fixing ring. The bolt passes through the sleeve and then cooperates with the bolt hole.

[0012] Preferably, a sawtooth bar parallel to the axis of the sleeve is provided on the outer surface of the sleeve, and a shallow groove ring is provided on the outer surface of the sleeve, and the sawtooth bar and the shallow groove ring are staggered with each other.

[0013] Due to the adoption of the above technical solution, compared with the prior art, the present invention has a simple processing technology, is easy to install, has strong versatility and is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attachment Figure 1 It is a structural schematic diagram of the present invention;

[0015] Attachment Figure 2 A schematic diagram of the structure applied to a controller;

[0016] Attachment Figure 3 Schematic diagram of the structure of the base body in the controller;

[0017] Attachment Figure 4 This is a schematic diagram of the controller chip installation box structure in the controller;

[0018] Attachment Figure 5 This is a schematic diagram of the aluminum sheet structure in the controller;

[0019] Attachment Figure 6 Schematic diagram of the structure of the sleeve in the controller;

[0020] Attachment Figure 7 This is a schematic diagram of the connection between the present invention and external wires;

[0021] Attachment Figure 8 For attachment Figure 7 Schematic cross-section of the middle retaining ring and bolt 1.

[0022] The marks in the accompanying drawings are: 1-base, 2-base cover, 3-controller chip mounting box, 4-conductor sheet, 5-aluminum sheet structure, 6-bolt slot, 7-bolt, 8-fixing column, 9-fixing ring, 10-bolt hole, 11-bolt 1, 12-nut, 13-support circular plate, 14-sleeve, 15-serrated bar, 16-shallow groove ring, 17-connecting end, 18-through hole, 19-boss, 20-external wire, 21-upper surface, 22-gap. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings, but this does not limit the present invention in any way.

[0024] Example 1, as shown in the attached Figure 1-8 As shown, the output end structure of a motor controller of the present invention is characterized in that: it includes a fixing column 8 on the base cover 2 and a bolt hole 10 located on the base 1; the fixing column 8 is connected to the output end of the conductor sheet 4 arranged in the base cover 2, and the output end of the conductor sheet 4 is sleeved on the fixing column 8, and the external wire used to be connected to the positive pole of the controller chip is sleeved on the fixing column 8 to realize the connection and fixation of the external wire and the conductor sheet 4; a fixing ring 9 is provided at the bottom end of the fixing column 8 and the fixing ring 9 is wrapped by the base cover 2 so that the outside of the fixing ring 9 is insulated, and the position of the fixing ring 9 corresponds to the bolt hole 10 on the base 1, and a bolt 11 passes through the fixing ring 9 and is connected with the bolt hole 10 to realize that the middle part of the fixing ring 9 is fixed to the base cover 2, and its bottom is fixed to the base 1 by a bolt 11 and is insulated from each other.

[0025] The upper part of the fixing column 8 is a threaded structure, and the nut 12 cooperates with the fixing column 8 so that the conductive sheet 4 sleeved on the fixing column 8 and the external wire are in stable contact with each other. A supporting circular plate 13 is provided at the lower part of the fixing column 8. The supporting circular plate 13 is embedded in the base cover 2 as a whole and the upper surface is exposed. The upper surface of the supporting circular plate 13 is higher than the upper surface of the base cover 2 around it. A sleeve 14 is provided in the hollow position in the middle of the fixing ring 9. The sleeve 14 is embedded in the base cover 2 around the fixing ring 9. The bolt 11 passes through the sleeve 14 and then cooperates with the bolt hole 10. A serrated bar 15 parallel to the axis of the sleeve 14 is provided on the outer surface of the sleeve 14, and a shallow groove ring 16 is provided on the outer surface of the sleeve 14. The serrated bar 15 and the shallow groove ring 16 are staggered with each other.

[0026] This embodiment is applied to a controller structure of a motor, including a base 1, a base cover 2 and a controller chip mounting box 3; the base 1 is a conductor structure with a cavity, and its bottom is grounded; the controller chip mounting box 3 is fixed in the base 1 and fixed, and the negative lead of the controller chip is connected to the base 1; the base cover 2 is connected to the base 1 by bolts or screws and is insulated from each other, the base cover 2 is insulated as a whole, and a conductor sheet 4 for connecting to the positive electrode of the controller chip is provided in the base cover 2; the conductor sheet 4 is pre-buried in the base cover 2 and its output end is exposed, wherein the controller chip mounting box 3 is placed on the connection end 17 of the base 1 that cooperates with the controller chip mounting box 3, wherein the base 1 is cast as a whole from a conductive metal (generally cast from aluminum), the base cover 2 is cast as a whole from an insulating plastic material, and the conductor sheet 4 is placed on the base cover 2 and cast as a whole from a mold, but its input end and output end are respectively exposed.

[0027] In the prior art, the two bases are also integrally cast from aluminum. The reason why the base on the upper layer is not cast from plastic is mainly because the connecting columns in the prior art (connecting columns are all made of highly conductive metals, such as aluminum or copper) need to be fixedly connected to them. If plastic is used to connect the base and the connecting columns, under the action of torque, the connecting columns and the base are difficult to withstand the torsion. Therefore, the upper base is generally made of a metal with higher hardness, and then the connecting columns are fixed to the connecting holes of the upper base by rivets. However, this connection method is still unreliable. The two metal parts are only fixed by mechanical pre-tightening (deformation of the rivets), which is easy to cause loosening during long-term use in the later stage, making the connection here unreliable.

[0028] The bottom of the controller chip mounting box 3 is a conductive aluminum sheet structure 5, which is connected to the negative terminal of the controller chip, and the connection method is shown in the figure; the chip is placed in the controller chip mounting box 3, and the controller chip mounting box 3 is still made of insulating plastic material. A through hole 18 is set at the bottom of the controller chip mounting box 3, and the negative terminal of the chip is opposite to the through hole 18. A connecting boss 19 is set on the aluminum sheet structure 5, which passes through the through hole 18 and contacts the negative terminal of the chip, and then the aluminum sheet structure 5 is fixed to the bottom of the controller chip mounting box 3 to form a whole, so that the negative terminal of the chip is connected to the aluminum sheet structure 5, and a bolt groove 6 is set on the base 1 next to the controller chip mounting box 3, and the bolt groove 6 is integrated with the base and has a conductive effect. The bolt 7 passes through the aluminum sheet structure 5 and is tightened in the bolt groove 6, so that the negative terminal of the controller chip in the controller chip mounting box 3 is connected to the base 1 through the aluminum sheet structure 5, the bolt 7, and the bolt groove 6 in turn and forms a ground.

[0029] A fixing post 8 is embedded in the base cover 2 at the output end of the conductor sheet 4. The output end of the conductor sheet 4 is sleeved on the fixing post 8. The external wire connected to the positive electrode of the controller chip is sleeved on the fixing post 8 to achieve the connection and fixation of the external wire with the conductor sheet 4. The upper part of the fixing post 8 is a threaded structure. The nut 12 cooperates with the fixing post 8 so that the conductive sheet 4 sleeved on the fixing post 8 and the external wire 20 are in stable contact with each other. A supporting circular plate 13 is provided at the lower part of the fixing post 8. The supporting circular plate 13 is embedded in the base cover 2 as a whole and the upper surface is exposed. The upper surface 2 of the supporting circular plate 13 1 is higher than the upper surface of the base cover 2 around it. By providing the supporting circular plate 13, the contact area between the fixing column 8 and the base cover 2 can be increased, so that the base cover 2 is reliably fixed to it. At the same time, the upper surface 21 of the supporting circular plate 13 is provided to ensure that the conductor piece 4 is tightly connected to the external wire 20 when the nut 12 is tightened with the conductor piece 4. At the same time, when the conductor piece 4 is connected to the external wire 20, the conductor piece 4 can also be connected to the external wire 20 through the supporting circular plate 13, the nut 12 and the fixing column 8.

[0030] A fixing ring 9 is provided at the bottom end of the fixing column 8 and the fixing ring 9 is wrapped by the base cover 2 so that the outside of the fixing ring 9 is insulated. A bolt hole 10 is provided on the base body 2 corresponding to the position of the fixing ring 9, and a bolt 11 passes through the fixing ring 9 and cooperates with the bolt hole 10 to fix the middle part of the fixing ring 9 to the base cover 2, and its bottom is fixed to the base body 1 by a bolt 11 and is insulated from each other. A sleeve 14 is provided in the hollow position in the middle of the fixing ring 9, and the sleeve 14 is embedded in the base cover 2 around the fixing ring 9. The bolt 11 passes through the sleeve 14 and then cooperates with the bolt hole 10. A serrated bar 15 parallel to the axis of the sleeve 14 is provided on the outer surface of the sleeve 14, and a shallow groove ring 16 is provided on the outer surface of the sleeve 14. The serrated bar 15 and the shallow groove ring 16 are staggered with each other. By providing the serrated bar 15 and the shallow groove ring 16, the base body 2 covering the outside of the sleeve 14 can limit the rotation or axial movement direction of the sleeve 14.

[0031] In this embodiment, the fixing column 8, the supporting circular plate 13 and the fixing ring 9 (the thickness of the fixing ring 9 is not limited and can be specifically designed according to the torsion) are integrally cast and formed into one body. After the fixing column 8 adopts this structure, when the base cover 2 is cast with insulating material, it is cast as a whole (in this case, the conductive sheet 4 is also cast together and the conductive sheet 4 is sleeved on the fixing column 8), so that the threaded structure portion of the fixing column 8, the upper surface 21 of the supporting circular plate and the hollow portion of the sleeve 14 are exposed, and the rest are completely wrapped and covered by the base cover 2 (including the gap 22 between the fixing ring 9 and the sleeve 14, which is filled with the insulating material constituting the base cover 2). A bolt hole 10 is provided on the base 1 corresponding to the position of the fixing ring 9, and a bolt 11 is screwed into the bolt hole 10 after passing through the sleeve 14 to form a whole with the base 1.

[0032] When the external wire 20 is placed on the fixing post 8 and is in contact with the conductive sheet 4, the nut 12 is tightened on the fixing post 8. After the conductive sheet 4 and the external wire 20 come into contact, a torque is applied (refer to existing technical standards) to make them adhere tightly to each other (at the same time, the fixing ring 9 on the fixing post is also in contact with the conductive sheet 4 and the external wire 20).

[0033] When torque is generated, the fixing column 8 is also subjected to torque. However, since the fixing column 8 is covered by the base cover 2 as a whole to achieve position fixation, and plastic is a brittle material with low strength, it cannot resist excessive torque applied to the fixing column (easy to break). The torque applied to the fixing column 8 is mainly transmitted through the fixing column 8 to the sleeve 14, then to the bolt 11, and finally to the base 1. Since the fixing column 8 (including the fixing ring 9, the supporting circular plate 13), the sleeve 14, the bolt 11 and the base 1 are all made of metal with very strong hardness, they can withstand large torque, and the base cover 2 as a whole only bears part of the torque (the base cover here only has the function of limiting the position of the fixing column 8), the anti-torque effect of the fixing column is greatly increased, and the reliable contact between the controller and the external line can be ensured during use.

[0034] Compared with the prior art, the base cover 2 is made of only insulating plastic, which greatly saves costs. The space for mounting the chip on the base is increased, so that the controller can have more control functions, and the output terminal connection is reliable and stable.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An output terminal structure of a motor controller, characterized in that: It comprises a fixing column (8) on the base cover (2) and a bolt hole (10) located on the base body (1); The fixing column (8) is connected to the output end of the conductor sheet (4) disposed in the base cover (2); the output end of the conductor sheet (4) is sleeved on the fixing column (8); an external wire connected to the positive electrode of the controller chip is sleeved on the fixing column (8) to achieve a connection and fixation between the external wire and the conductor sheet (4); A fixing ring (9) is arranged at the bottom end of the fixing column (8) and the fixing ring (9) is wrapped by the base cover (2) so that the outside of the fixing ring (9) is insulated, the position of the fixing ring (9) corresponds to the bolt hole (10) on the base (1), a bolt (11) passes through the fixing ring (9) and is matched with the bolt hole (10) to achieve the fixing of the middle part of the fixing ring (9) to the base cover (2), and the bottom part of the fixing ring (9) is fixed to the base (1) by the bolt (11) and is insulated from each other; A supporting circular plate (13) is provided at the lower part of the fixed column (8); the supporting circular plate (13) is entirely embedded in the base cover (2) with its upper surface exposed; the upper surface of the supporting circular plate (13) is higher than the upper surface of the base cover (2) around it; the fixed column (8), the supporting circular plate (13) and the fixed ring (9) are integrally cast and formed into one body.

2. The output terminal structure of a motor controller according to claim 1, characterized in that: The upper portion of the fixing column (8) is a threaded structure, and the nut (12) cooperates with the fixing column (8) so that the conductor sheet (4) sleeved on the fixing column (8) and the external wire are in stable contact with each other.

3. The output terminal structure of a motor controller according to claim 1, characterized in that: A sleeve (14) is arranged in a hollow position in the middle of the fixing ring (9). The sleeve (14) is embedded in a base cover (2) around the fixing ring (9). Bolt 1 (11) passes through the sleeve (14) and then cooperates with the bolt hole (10).

4. The output terminal structure of a motor controller according to claim 3, characterized in that: A sawtooth bar (15) parallel to the axis of the sleeve (14) is arranged on the outer surface of the sleeve (14), and a shallow groove ring (16) is arranged on the outer surface of the sleeve (14), wherein the sawtooth bar (15) and the shallow groove ring (16) are interlaced with each other.

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