A controller for a servo motor

Abstract

The invention discloses a controller for a servo motor, comprising a support frame base cover and a controller chip mounting box base cover; the support frame base cover is a conductor structure, and its bottom is grounded; at least two cavity base covers are arranged on the support frame base cover; the controller chip mounting box base cover is buckled on and fixed to the cavity base cover, and the negative lead wire of the controller chip is connected to the support frame base cover; the invention has simple processing technology, convenient installation, strong versatility and higher stability.

Description

Technical Field

[0001] The invention relates to a controller of a servo motor and belongs to the application field of motor control technology. 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 terminal to rectify the output of the servo motor and control the power or output opening and closing.

[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 a rectifier bridge control element composed of a diode is arranged on the other substrate. The negative end of the control element is connected to the grounded substrate, and the positive electrode (conductor sheet structure) of the control element 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 connect 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 left and right). However, the material of the connecting column and the base body with the control element is inconsistent (considering the casting process, the material itself and the assembly cost), so it is difficult to overcome the effect of the above torque by the fixing method between the connecting column and the base body (the existing technology generally fixes the connecting column to the base body through the through hole on the base body by rivets), which is easy to cause the connection between the connection and the base body to loosen or deviate due to vibration or other external factors in the later stage, thereby causing the control element and the external wire to be unstable, so that the servo motor cannot be controlled normally;

[0004] At the same time, since the controller generates heat during operation, if the heat is not dissipated in time, the working state and service life of the controller will be greatly reduced. The prior art adopts the method of setting a heat sink, generally the controller is placed on the heat sink, and ventilation is adopted under the heat sink to transfer heat. However, the effect of this method is not obvious. Summary of the invention

[0005] The purpose of the present invention is to provide a controller for a servo motor, which completely changes the existing design structure to overcome the deficiencies of the prior art.

[0006] Technical solution of the present invention

[0007] A controller for a servo motor, comprising a support frame base cover and a controller chip mounting box base cover;

[0008] The support frame base cover is a conductor structure, and its bottom is grounded; at least two cavity base covers are arranged on the support frame base cover;

[0009] The controller chip installation box base cover is buckled on the cavity base cover and fixed, and the negative electrode lead wire of the controller chip is connected to the support frame base cover;

[0010] Preferably, the bottom plate of the controller chip installation box base cover is a conductive aluminum sheet structure base cover, the aluminum sheet structure base cover is connected to the negative terminal of the controller chip located in the controller chip installation box base cover, a bolt slot base cover is arranged on the support frame base cover next to the controller chip installation box base cover, and the bolt slot base cover is integrated with the base body and has a conductive function, the bolt base cover passes through the aluminum sheet structure base cover and is tightened in the bolt slot base cover, so that the negative electrode of the controller chip in the controller chip installation box base cover is connected to the support frame base cover through the aluminum sheet structure base cover, the bolt base cover, and the bolt slot base cover in sequence and forms a ground;

[0011] The lower surface of the aluminum sheet structure base cover is provided with a drainage cooling strip base cover and a channel base cover surrounded by the drainage cooling strip base cover and the lower surface of the aluminum sheet structure base cover;

[0012] A card base cover is arranged along the edge of the lower surface of the aluminum sheet structure base cover, and the card base cover cooperates with the cavity base cover to realize stable and reliable connection of the controller chip installation box base cover.

[0013] Preferably, two phase current connector base covers are arranged in front of the base cover of the controller chip installation box, and two elastic conductive connecting sheet base covers are symmetrically arranged on the left and right sides of the base cover of the controller chip installation box, and the elastic conductive connecting sheet base covers are used to connect adjacent controller chip installation box base covers;

[0014] The end of the elastic conductive connecting sheet base cover is a slope structure. The end surface of one elastic conductive connecting sheet base cover of the controller chip installation box base cover is flat, and a contact protrusion base cover is arranged on the end surface of the other elastic conductive connecting sheet base cover.

[0015] Preferably, a capacitor mounting slot base cover is provided on one side of the support frame base cover; the capacitor mounting slot base cover is a cavity structure and a controller chip capacitor circuit is placed in the capacitor mounting slot base cover, and an output signal circuit of the controller chip mounting box base cover is connected to the capacitor mounting slot base cover and leads to an output end.

[0016] Preferably, a base cover is provided above the support frame base cover and the capacitor installation slot base cover;

[0017] The base cover is connected to the support frame base cover or the capacitor installation slot base cover by bolts or hinges and is insulated from each other. The base cover is insulated as a whole and a conductor sheet base cover for connecting the controller chip or the positive electrode of the controller chip capacitor is arranged inside the base cover;

[0018] The conductor sheet base cover is pre-buried in the base cover and the output end thereof is exposed.

[0019] Preferably, a fixed column base cover is pre-embedded at the base cover of the output end of the conductor sheet base cover, and the output end of the conductor sheet base cover is sleeved on the fixed column base cover, and an external wire connected to the controller chip or the positive electrode of the controller chip capacitor is sleeved on the fixed column base cover to connect and fix the external wire to the conductor sheet base cover.

[0020] Preferably, the upper portion of the fixed column base cover is a threaded structure, and the nut base cover cooperates with the fixed column base cover so that the conductive sheet base cover sleeved on the fixed column base cover and the external wires are in stable contact with each other.

[0021] Preferably, a supporting circular plate base cover is provided at the lower part of the fixed column base cover, and the supporting circular plate base cover is entirely embedded in the base cover and the upper surface is exposed;

[0022] Preferably, the upper surface of the supporting circular plate base cover is higher than the upper surface of the base cover around it.

[0023] Preferably, a fixed ring base cover is arranged at the bottom end of the fixed column base cover and the fixed ring base cover is wrapped by the base cover so that the outside of the fixed ring base cover is insulated, a bolt hole base cover is arranged on the support frame base cover corresponding to the position of the fixed ring base cover, and the bolt-base cover passes through the fixed ring base cover and is matched with the bolt hole base cover to achieve the fixing of the middle part of the fixed ring base cover with the base cover, and the bottom thereof is fixed with the support frame base cover through the bolt-base cover and is insulated from each other;

[0024] A sleeve base cover is arranged in the hollow position in the middle of the fixed ring base cover, and the sleeve base cover is embedded in the base cover around the fixed ring base cover, and the bolt-base cover passes through the sleeve base cover and then cooperates with the bolt hole base cover;

[0025] A sawtooth bar base cover parallel to the axis of the sleeve base cover is arranged on the outer surface of the sleeve base cover, and a shallow groove ring base cover is arranged on the outer surface of the sleeve base cover, and the sawtooth bar base cover and the shallow groove ring base cover are staggered with each other.

[0026] Due to the adoption of the above technical solution, compared with the prior art, the present invention has simple processing technology, convenient installation, strong versatility and higher stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attached Figure 1 It is a structural schematic diagram of the present invention;

[0028] Attached Figure 2 For attachment Figure 1 Bottom view of

[0029] Attached Figure 3 Yes Figure 1 Attached to the middle fixed column Figure 1 A cross-sectional view of

[0030] Attached Figure 4 It is a structural schematic diagram of the support frame;

[0031] Attached Figure 5 This is a schematic diagram of the structure of the controller chip installation box;

[0032] Attached Figure 6 It is a schematic diagram of the aluminum sheet structure;

[0033] Attached Figure 7 It is a schematic diagram of the structure of the sleeve;

[0034] Attached Figure 8 It is a schematic diagram of the connection between the present invention and external wires;

[0035] Attached Fig. 9 It is a cross-sectional schematic diagram of the cooperation between the fixing ring and the bolt.

[0036] The marks in the accompanying drawings are: 1-support frame, 2-cavity, 3-controller chip mounting box, 4-aluminum sheet structure, 5-bolt slot, 6-bolt, 7-drainage cooling strip, 8-channel, 9-card platform, 10-phase current connector, 11-elastic conductive connecting piece, 12-contact protrusion, 13-capacitor mounting slot, 14-base cover, 15-conductor sheet, 16-fixing column, 17-nut, 18-support circular plate, 19-fixing ring, 20-bolt hole, 21-bolt one, 22-sleeve, 23-serrated bar, 24-shallow groove ring, 25-gap, 26-external wire. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings, but this is not intended to limit the present invention in any way.

[0038] As attached Figure 1-8 As shown, a controller of a servo motor of the present invention comprises a support frame 1 and a controller chip mounting box 3, wherein the support frame 1 is a conductor structure, and its bottom is grounded; at least two cavities 2 are arranged on the support frame 1; the controller chip mounting box 3 is buckled on the cavity 2 and fixed, and the negative lead wire of the controller chip is connected to the support frame 1;

[0039] The bottom plate of the controller chip installation box 3 is a conductive aluminum sheet structure 4, which is connected to the negative terminal of the controller chip located in the controller chip installation box 3. A bolt groove 5 is provided on the support frame 1 next to the controller chip installation box 3, and the bolt groove 5 is integrated with the substrate and has a conductive function. The bolt 6 passes through the aluminum sheet structure 4 and is tightened in the bolt groove 5, so that the negative electrode of the controller chip in the controller chip installation box 3 is connected to the support frame 1 through the aluminum sheet structure 4, the bolt 6, and the bolt groove 5 in sequence and forms a ground;

[0040] The lower surface of the aluminum sheet structure 4 is provided with a drainage cooling strip 7 and a channel 8 surrounded by the drainage cooling strip 7 and the lower surface of the aluminum sheet structure 4;

[0041] A card platform 9 is set along the edge of the lower surface of the aluminum sheet structure 4, and the card platform 9 cooperates with the cavity 2 to realize the stable and reliable connection of the controller chip installation box 3. The cavity 2 is set on the support frame, and the controller chip installation box 3 is directly installed in the cavity and fixed, and a drainage cooling strip 7 is set on the lower surface of the aluminum sheet structure 4. Under the action of the fan, the cold air directly acts on the aluminum sheet structure 4 at the bottom of the controller chip installation box 3, which can greatly improve the heat dissipation effect. The aluminum sheet structure 4 itself serves as the negative output terminal of the controller chip in the controller chip installation box 3, so that the heat dissipation effect is very obvious. The prior art generally places the controller chip on a heat sink, and dissipates the heat through the heat sink, which has an extra step of heat transfer in the middle, and it is necessary to ensure that the controller chip is in stable contact with the heat sink, otherwise the effect is not obvious. This scheme completely avoids the design scheme of the prior art, and has low production cost and high reliability.

[0042] Two phase current connectors 10 are arranged in front of the controller chip installation box 3, and the phase current connectors 10 are used to connect the corresponding lower phase circuits of the motor. Two elastic conductive connecting pieces 11 are symmetrically arranged on the left and right sides of the controller chip installation box 3, and the elastic conductive connecting pieces 11 are used to connect adjacent controller chip installation boxes 3. The elastic conductive connecting pieces 11 are used to transmit control signals between the controller chips;

[0043] The end of the elastic conductive connecting piece 11 is a bevel structure. The end surface of one elastic conductive connecting piece 11 of the controller chip mounting box 3 is flat, and a contact protrusion 12 is arranged on the end surface of the other elastic conductive connecting piece 11. The bevel structure and the contact protrusion 12 make the connection between adjacent controller chip mounting boxes 3 stable and reliable.

[0044] A capacitor mounting groove 13 is provided on one side of the support frame 1; the capacitor mounting groove 13 is a cavity structure and a controller chip capacitor circuit is placed in the capacitor mounting groove 13, and an output signal circuit of the controller chip mounting box 3 is connected to the capacitor mounting groove 13 and leads to an output end.

[0045] A base cover 14 is arranged above the support frame 1 and the capacitor installation slot 13;

[0046] The base cover 14 is connected to the support frame 1 or the capacitor installation slot 13 by bolts or hinges and is insulated from each other. The base cover 14 is insulated as a whole and a conductor sheet 15 is arranged inside the base cover 14 for connecting to the controller chip or the positive electrode of the controller chip capacitor; the support frame 1 is called a base in the prior art, which is integrally cast from a conductive metal, generally aluminum, and the base cover 14 is integrally cast from an insulating plastic material, and the conductor sheet 15 is placed on the base cover 14 and integrally cast from a mold, and its input end and output end are respectively exposed.

[0047] In the prior art, the two substrates are also integrally cast by aluminum casting. The reason why the substrate on the upper layer is not cast by plastic is mainly because the connecting columns in the prior art are all made of highly conductive metals, such as aluminum or copper, which need to be fixedly connected. If plastic is used to connect the substrate and the connecting column, under the action of torque, it is difficult for the connecting column and the substrate to withstand the torque. Therefore, the upper substrate is generally made of metal with higher hardness, and then the connecting column is fixed in the connecting hole of the upper substrate by rivets. However, the connection method is still unreliable. The two metal parts are only fixed by the deformation of the mechanical pre-tightening rivets, which is easy to cause looseness during long-term use in the later stage, making the connection here unreliable.

[0048] The conductor sheet 15 is embedded in the base cover 14 and its output end is exposed.

[0049] A fixing column 16 is embedded in the base cover 14 at the output end of the conductor sheet 15 , and the output end of the conductor sheet 15 is sleeved on the fixing column 16 , and an external wire connected to the controller chip or the positive electrode of the controller chip capacitor is sleeved on the fixing column 16 to connect and fix the external wire to the conductor sheet 15 .

[0050] The upper portion of the fixing column 16 is a threaded structure, and the nut 17 cooperates with the fixing column 16 so that the conductor sheet 15 sleeved on the fixing column 16 and the external wire are in stable contact with each other.

[0051] A supporting circular plate 18 is disposed at the lower portion of the fixing column 16. The supporting circular plate 18 is entirely embedded in the base cover 14 with the upper surface exposed.

[0052] The upper surface of the support circular plate 18 is higher than the upper surface of the base cover 14 around it.

[0053] A fixing ring 19 is provided at the bottom end of the fixing column 16 and the fixing ring 19 is wrapped by the base cover 14 so that the outside of the fixing ring 19 is insulated, and a bolt hole 20 is provided on the support frame 1 corresponding to the position of the fixing ring 19, and a bolt 21 passes through the fixing ring 19 and is connected with the bolt hole 20, so that the middle part of the fixing ring 19 is fixed to the base cover 14, and the bottom thereof is fixed to the support frame 1 through the bolt 21 and is insulated from each other;

[0054] A sleeve 22 is provided in the hollow position in the middle of the fixing ring 19, and the sleeve 22 is embedded in the base cover 14 around the fixing ring 19, and a bolt 21 passes through the sleeve 22 and then cooperates with the bolt hole 20;

[0055] A sawtooth bar 23 parallel to the axis of the sleeve 22 is arranged on the outer surface of the sleeve 22 , and a shallow groove ring 24 is arranged on the outer surface of the sleeve 22 , and the sawtooth bar 23 and the shallow groove ring 24 are staggered with each other.

[0056] In this embodiment, the thickness of the fixing column 16, the supporting circular plate 18 and the fixing ring 19 is not limited, and can be integrally cast and formed into one body according to the specific design of the torsion. After the fixing column 16 adopts this structure, when the base cover 14 is cast with insulating material, the conductor sheet 15 is also cast together by integral casting, and the conductive sheet 15 is sleeved on the fixing column 16, so that the threaded structure part of the fixing column 16, the upper surface of the supporting circular plate and the hollow part of the sleeve 22 are exposed, and the rest are completely wrapped and covered by the base cover 14, including the gap 25 between the fixing ring 19 and the sleeve 22, which is filled with the insulating material constituting the base cover 14. A bolt hole 20 is set on the support frame 1 corresponding to the position of the fixing ring 19, and a bolt 21 passes through the sleeve 22 and is screwed into the bolt hole 20 to form a whole with the support frame 1.

[0057] When the external wire 26 is put on the fixing column 16 and is in contact with the conductor sheet 15, the nut 17 is screwed onto the fixing column 16. When the conductor sheet 15 and the external wire 26 are in contact, a torque is applied to make them close to each other according to the existing technical standards. At the same time, the fixing ring 19 on the fixing column is also in close contact with the conductor sheet 15 and the external wire 26.

[0058] When torque is generated, the fixing column 16 is also subjected to torque. However, since the fixing column 16 is covered as a whole by the base cover 14 to achieve position fixing, and plastic is a brittle material with low strength, it cannot resist excessive torque applied to the fixing column and is easily broken. The torque applied to the fixing column 16 is mainly transmitted to the sleeve 22, then to the bolt 21, and finally to the support frame 1 through the fixing column 16. Since the fixing column 16 includes a fixing ring 19, a supporting circular plate 18, a sleeve 22, a bolt 21 and the support frame 1, which are all made of metal with very strong hardness, they can resist large torque, while the base cover 14 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 16, which greatly increases the anti-torque effect of the fixing column, and can ensure that the controller is in reliable contact with the external line when in use.

[0059] Compared with the prior art, the base cover 14 is made of insulating plastic only, 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 connection is reliable and stable.

[0060] 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 protection scope of the present invention.

Claims

1. A servo motor controller, comprising a support frame (1) and a controller chip mounting box (3), characterized in that: The support frame (1) is a conductor structure, the bottom of which is grounded; at least two cavities (2) are arranged on the support frame (1); The controller chip installation box (3) is buckled on the cavity (2) and fixed, and the negative electrode lead wire of the controller chip is connected to the support frame (1); A capacitor installation groove (13) is provided on one side of the support frame (1); and a base cover (14) is provided above the support frame (1) and the capacitor installation groove (13); The base cover (14) is connected to the support frame (1) or the capacitor installation slot (13) by bolts or hinges and is insulated from each other. The base cover (14) is insulated as a whole and a conductor sheet (15) for connecting to the controller chip or the positive electrode of the controller chip capacitor is provided inside the base cover (14); The conductor sheet (15) is pre-buried in the base cover (14) and its output end is exposed; A fixing column (16) is embedded in the base cover (14) at the output end of the conductor sheet (15); the output end of the conductor sheet (15) is sleeved on the fixing column (16); an external wire connected to the controller chip or the positive electrode of the controller chip capacitor is sleeved on the fixing column (16) to achieve connection and fixation of the external wire with the conductor sheet (15); The upper portion of the fixing column (16) is a threaded structure, and the nut (17) cooperates with the fixing column (16) so that the conductor sheet (15) sleeved on the fixing column (16) and the external wire are in stable contact with each other; A supporting circular plate (18) is provided at the lower part of the fixing column (16), and the supporting circular plate (18) is integrally embedded in the base cover (14) with its upper surface exposed; the upper surface of the supporting circular plate (18) is higher than the upper surface of the base cover (14) around it; a fixing ring (19) is provided at the bottom end of the fixing column (16), and the fixing ring (19) is wrapped by the base cover (14) so ​​that the outside of the fixing ring (19) is insulated; a bolt hole (20) is provided on the support frame (1) corresponding to the position of the fixing ring (19); a bolt (21) passes through the fixing ring (19) and is matched with the bolt hole (20) to achieve fixing of the middle part of the fixing ring (19) to the base cover (14), and the bottom part of the fixing ring (19) is fixed to the support frame (1) by the bolt (21) and is insulated from each other; A sleeve (22) is provided at a hollow position in the middle of the fixing ring (19), and the sleeve (22) is embedded in the base cover (14) around the fixing ring (19). A bolt (21) passes through the sleeve (22) and then cooperates with the bolt hole (20); A sawtooth bar (23) parallel to the axis of the sleeve (22) is arranged on the outer surface of the sleeve (22), and a shallow groove ring (24) is arranged on the outer surface of the sleeve (22), and the sawtooth bar (23) and the shallow groove ring (24) are interlaced with each other; the capacitor installation groove (13) is a cavity structure, and a controller chip capacitor circuit is placed in the capacitor installation groove (13), and the output signal circuit of the controller chip installation box (3) is connected to the capacitor installation groove (13) and leads to the output end; the support frame (1) is integrally cast from a conductive metal, and the base cover (14) is integrally cast from an insulating plastic material.

2. A servo motor controller according to claim 1, characterized in that: The bottom plate of the controller chip installation box (3) is a conductive aluminum sheet structure (4), the aluminum sheet structure (4) is connected to the negative terminal of the controller chip located in the controller chip installation box (3), a bolt slot (5) is provided on the support frame (1) next to the controller chip installation box (3), and the bolt slot (5) is integrated with the base body and has a conductive function, and the bolt (6) passes through the aluminum sheet structure (4) and is tightened in the bolt slot (5), so that the negative electrode of the controller chip in the controller chip installation box (3) is connected to the support frame (1) through the aluminum sheet structure (4), the bolt (6), and the bolt slot (5) in sequence and forms a ground; The lower surface of the aluminum sheet structure (4) is provided with a drainage cooling strip (7) and a channel (8) surrounded by the drainage cooling strip (7) and the lower surface of the aluminum sheet structure (4); A card platform (9) is arranged along the edge of the lower surface of the aluminum sheet structure (4), and the card platform (9) cooperates with the cavity (2) to achieve a stable and reliable connection of the controller chip installation box (3).

3. A servo motor controller according to claim 2, characterized in that: Two phase current connectors (10) are arranged in front of the controller chip installation box (3), and two elastic conductive connecting pieces (11) are symmetrically arranged on the left and right sides of the controller chip installation box (3), and the elastic conductive connecting pieces (11) are used to connect adjacent controller chip installation boxes (3); The end of the elastic conductive connecting piece (11) is a sloped structure; the end surface of one elastic conductive connecting piece (11) of the controller chip mounting box (3) is flat, and a contact protrusion (12) is provided on the end surface of another elastic conductive connecting piece (11).

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