A vertical controller structure of a servo motor

Abstract

The present invention discloses a vertical controller structure of a servo motor, comprising a cover plate, a heat sink and a controller chip device installation box, wherein a capacitor installation groove is arranged at the front end of the heat sink, the middle part of the heat sink is a hollow structure, and a controller chip installation box fixing position is arranged on the upper surface of the heat sink; a vertical baffle is arranged at the fixed position of the controller chip installation box of the heat sink; drainage cooling strips and a channel surrounded by the drainage cooling strips and the back surface of the heat sink are arranged on the back surface of the heat sink and the back surface of the vertical baffle; the controller chip device installation box is placed at the fixed position of the controller chip installation box and the heat dissipation surface at the bottom of the controller chip device installation box is tightly fixed to the vertical baffle; the cover plate and the heat sink cooperate to wrap the controller chip device installation box inside, and the present invention has simple processing technology, convenient installation, strong versatility and higher stability.

Description

Technical Field

[0001] The invention relates to a vertical controller structure of a servo motor, and belongs to the field of motor drive applications. Background Art

[0002] The motor can convert the rotation of an induction rotor driven by an engine into an induced current in the induction coil of a multi-phase stator; the stator generally includes three phase windings, so the generator is a three-phase generator; the three induction phases are connected to a rectifier bridge; the rectifier bridge includes three branches, each branch includes at least two diodes connected to each phase; however, these diodes will generate heat; therefore, the rectifier bridge should be cooled to avoid overheating of the diodes.

[0003] Figure 1 It is the prior art closest to this solution (CN200380101337.1). Figure 1 7 is a side cross-sectional view of the rear portion of a generator-starter including a cooling device according to the present invention;

[0004] However, the above technical solution still has shortcomings. First, the power electronic device is attached to the heat dissipation bridge. Due to the processing technology, the contact between the power electronic device and the heat dissipation bridge cannot be 100% stable, so that the heat transfer between the power electronic device 5 and the heat dissipation bridge cannot be fully exerted; therefore, it is urgent to make a major improvement to the original structure to achieve rapid heat dissipation of the power electronic device;

[0005] The two substrates of the structure are integrally cast with metal materials, and the two substrates are insulated from each other. One of the substrates 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 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 tightly fit the positive electrode of the control element to the external wire connection end, so that the connection The connecting column must be fixed to the basic connection (that is, the connecting column cannot have up and down displacement or left and right offset), but the material of the connecting column and the base with the control element are 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 (the existing technology generally fixes the connecting column to the base through the through hole on the base by rivets), which is easy to cause loosening or offset between the connection and the base due to vibration or other external factors in the later stage, thereby causing the control element to be unstable in the connection with the external wires, and thus failing to control the servo motor normally. Summary of the invention

[0006] The purpose of the present invention is to provide a vertical controller structure of a servo motor, which completely changes the existing design structure to overcome the shortcomings of the prior art.

[0007] Technical solution of the present invention

[0008] A vertical controller structure for a servo motor, comprising a cover plate, a heat sink and a controller chip device installation box, wherein a capacitor installation slot is arranged at the front end of the heat sink, the middle of the heat sink is a hollow structure, and a controller chip installation box fixing position is arranged on the upper surface of the heat sink;

[0009] A vertical baffle is provided at a fixed position of the controller chip mounting box of the heat sink;

[0010] A drainage cooling strip is arranged on the back surface of the heat sink and the back surface of the vertical baffle, and a channel is formed by the drainage cooling strip and the back surface of the heat sink;

[0011] The controller chip device installation box is placed in a fixed position of the controller chip installation box and the heat dissipation surface at the bottom of the controller chip device installation box is tightly fixed to the vertical baffle;

[0012] The cover plate cooperates with the heat sink to wrap the controller chip device installation box.

[0013] Preferably, the channels on the back surface of the heat sink are distributed in a fan shape along the hollow structure; and the channels on the back surface of the vertical baffle are distributed vertically.

[0014] Preferably, a layer of thermally conductive adhesive is provided between the controller chip device mounting box and the fixing position of the controller chip mounting box and the vertical baffle.

[0015] Preferably, a controller chip is arranged in the controller chip device installation box, two phase current connecting plates are arranged on one side of the controller chip device installation box, and two elastic conductive connecting plates are symmetrically arranged on the other side of the controller chip device installation box, and the elastic conductive connecting plates are used to connect adjacent controller chip device installation boxes and capacitor elements in capacitor installation slots.

[0016] Preferably, the end of the elastic conductive connecting piece is a sloped structure, the end surface of one elastic conductive connecting piece of the controller chip device mounting box is flat, and a contact protrusion is provided on the end surface of another elastic conductive connecting piece.

[0017] Preferably, the cover plate is connected to the heat sink or the capacitor mounting slot by bolts or hinges and is insulated from each other, the cover plate is insulated as a whole and a conductor sheet for connecting to the controller chip or the positive electrode of the controller chip capacitor is arranged inside the cover plate;

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

[0019] Preferably, a fixing column is embedded in the cover plate of the output end of the conductor sheet, and the output end of the conductor sheet is sleeved on the fixing column. An external wire connected to the controller chip or the positive electrode of the controller chip capacitor is sleeved on the fixing column to connect and fix the external wire to the conductor sheet.

[0020] Preferably, the upper portion of the fixing column is a threaded structure, and the nut cooperates with the fixing column so that the conductive sheet sleeved on the fixing column and the external wire are in stable contact with each other;

[0021] A supporting circular plate is arranged at the lower part of the fixed column, and the supporting circular plate is entirely embedded in the cover plate with the upper surface exposed;

[0022] Preferably, the upper surface of the supporting circular plate is higher than the upper surface of the surrounding cover plates.

[0023] Preferably, a fixing ring is provided at the bottom end of the fixing column and the fixing ring is wrapped by the cover plate so that the outside of the fixing ring is insulated, a bolt hole is provided on the heat sink corresponding to the position of the fixing ring, a bolt 1 passes through the fixing ring and is connected with the bolt hole, so that the middle of the fixing ring is fixed to the cover plate, and the bottom is fixed to the heat sink through the bolt 1 and is insulated from each other;

[0024] A sleeve is arranged in the hollow position in the middle of the fixing ring, and the sleeve is embedded in the cover plate around the fixing ring, and the bolt passes through the sleeve and then matches with the bolt hole;

[0025] A sawtooth bar parallel to the axis of the sleeve is arranged on the outer surface of the sleeve, and a shallow groove ring is arranged on the outer surface of the sleeve, and the sawtooth bar and the shallow groove ring 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 A schematic diagram of the rear portion of a generator-starter in the prior art, wherein the cooling fluid enters laterally;

[0028] Attached Figure 2 It is a structural schematic diagram of the present invention;

[0029] Attached Figure 3 For the attachment Figure 2 Bottom view of

[0030] Attached Figure 4 This is a structural front view of the heat dissipation plate in the present invention;

[0031] Attached Figure 5 This is a schematic diagram of the installation of the heat sink and the controller chip device installation box;

[0032] Attached Figure 6 It is a cross-sectional view of the structure of the fixed column in the present invention;

[0033] Attached Figure 7 This is a schematic diagram of the structure of the controller chip device installation box in the present invention;

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

[0035] Attached Fig. 9 It is a cross-sectional schematic diagram of the cooperation between the fixing ring and the bolt 1 in the present invention;

[0036] Attached Fig.10 It is a schematic diagram of the structure of the sleeve in the present invention.

[0037] The marks in the accompanying drawings are: 1-cover plate, 2-heat sink, 3-controller chip device installation box, 4-hollow structure, 5-controller chip installation box fixing position, 6-vertical baffle, 7-drainage cooling strip, 8-channel, 9-thermal conductive adhesive, 10-capacitor mounting slot, 11-phase current connecting piece, 12-elastic conductive connecting piece, 13-contact protrusion, 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

[0038] 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.

[0039] As attached Figure 2-10 As shown, a vertical controller structure of a servo motor of the present invention comprises a cover plate 1, a heat sink 2 and a controller chip device installation box 3, a capacitor installation groove 10 is arranged at the front end of the heat sink 201, the middle part of the heat sink 2 is a hollow structure 4, and a controller chip installation box fixing position 5 is arranged on the upper surface of the heat sink 2; a vertical baffle 6 is arranged at the controller chip installation box fixing position 5 of the heat sink 2; a drainage cooling strip 7 is arranged on the back surface of the heat sink 2 and the back surface of the vertical baffle 6, and a channel 8 surrounded by the drainage cooling strip 7 and the back surface of the heat sink; the controller chip device installation box 3 is placed at the controller chip installation box fixing position 2012 and the bottom heat dissipation surface of the controller chip device installation box 3 is tightly fixed to the vertical baffle 6; the cover plate 1 cooperates with the heat sink 2 to wrap the controller chip device installation box 3 inside.

[0040] The channel 8 located on the back surface of the heat sink 2 is distributed in a fan shape along the hollow structure 2011; the channel 8 located on the back surface of the vertical baffle 6 is distributed vertically; by forming the channel 8, under the action of the fan, the cooling wind can quickly cool the heat sink through the channel 8, thereby achieving the purpose of dissipating the heat of the rectifier chip in the controller chip device installation box 3; the fan-shaped distribution can ensure that the cold wind passing through the fan flows sequentially along the fan direction without causing air flow turbulence, resulting in uneven heat dissipation and poor effect. At the same time, by having heat dissipation channels 8 on the side and bottom of the controller chip device installation box 3, the placement space of the controller chip device installation box 3 is continuously increased, and secondly, the heat dissipation area of ​​the controller chip device installation box 3 is increased. In particular, the heat dissipation channel 8 with a vertical structure does not need to be turned under the action of the fan, which can greatly improve the heat dissipation effect.

[0041] A layer of thermal conductive adhesive 9 is arranged between the controller chip device installation box 3 and the controller chip installation box fixed position 2012 and the vertical baffle 6; by arranging the thermal conductive adhesive 9, the gap between the controller chip device installation box 3 and the heat sink 2 can be completely filled, so that the controller chip device installation box 3 and the heat sink 2 are fully contacted, so that the thermal conductivity is better.

[0042] A controller chip is arranged in the controller chip device installation box 3, two phase current connecting pieces 11 are arranged on one side of the controller chip device installation box 3, and two elastic conductive connecting pieces 12 are symmetrically arranged on the other side of the controller chip device installation box 3, the elastic conductive connecting pieces 12 are used to connect adjacent controller chip device installation boxes 3 and capacitor elements in capacitor installation slots 10, and the elastic conductive connecting pieces 11 are used to transmit control signals between controller chips; the ends of the elastic conductive connecting pieces 12 are inclined structures, the end surface of one elastic conductive connecting piece 12 of the controller chip device installation box 3 is flat, and a contact protrusion 13 is arranged on the end surface of the other elastic conductive connecting piece 3, so that the connection between adjacent controller chip installation boxes 3 is stable and reliable.

[0043] The cover plate 1 is connected to the heat sink 2 or the capacitor mounting slot 10 by bolts or hinges and is insulated from each other. The cover plate 1 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 arranged inside the cover plate 1; wherein the heat sink 2 is called a base in the prior art and is integrally cast from a conductive metal, generally aluminum, the cover plate 1 is integrally cast from an insulating plastic material, and the conductor sheet 15 is placed on the cover plate 1 and integrally cast from a mold, and its input end and output end are respectively exposed.

[0044] In the prior art, the two substrates are also integrally cast from aluminum. The reason why the substrate on the upper layer is not cast from 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 deformation of mechanical pre-tightening rivets, which is easy to cause looseness during long-term use in the later stage, making the connection here unreliable. The conductor sheet 15 is pre-buried in the cover plate 1 and its output end is exposed.

[0045] A fixing column 16 is embedded in the cover plate 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. The 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 the connection and fixation of the external wire with the conductor sheet 15; the upper part of the fixing column 16 is a threaded structure, and the nut 17 cooperates with the fixing column 16 so that the conductive 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 arranged at the lower part of the fixing column 16, and the supporting circular plate 18 is embedded in the cover plate 14 as a whole and the upper surface is exposed; the upper surface of the supporting circular plate 18 is higher than the upper surface of the cover plate 1 around it, and a fixing ring 19 is arranged at the bottom end of the fixing column 16 and fixed The fixed ring 19 is wrapped by the cover plate 1 so that the outside of the fixed ring 19 is insulated, and a bolt hole 20 is set on the heat sink 2 corresponding to the position of the fixed ring 19, and a bolt 21 passes through the fixed ring 19 and is connected with the bolt hole 20, so that the middle part of the fixed ring 19 is fixed to the cover plate 1, and its bottom is fixed to the heat sink 2 by the bolt 21 and is insulated from each other; a sleeve 22 is set in the hollow position in the middle of the fixed ring 19, and the sleeve 22 is embedded in the cover plate 14 around the fixed ring 19, and the bolt 21 passes through the sleeve 22 and then cooperates with the bolt hole 20. A serrated bar 23 parallel to the axis of the sleeve 22 is set on the outer surface of the sleeve 22, and a shallow groove ring 24 is set on the outer surface of the sleeve 22, and the serrated bar 23 and the shallow groove ring 24 are staggered with each other.

[0046] In this embodiment, the thickness of the fixing column 16, the supporting circular plate 18 and the fixing ring 19 is not limited, and the fixing ring 19 can be specifically designed to be integrally cast and formed into one body according to the torsion. After the fixing column 16 adopts this structure, when the cover plate 1 is cast with insulating material, the conductive 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 cover plate 1, including the gap 25 between the fixing ring 16 and the sleeve 22, which is filled with the insulating material constituting the cover plate 1. A bolt hole 20 is set on the heat sink 2 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 heat sink 2.

[0047] When the external wire 26 is put on the fixing column 16 and is in contact with the conductive sheet 15, the nut 17 is screwed onto the fixing column 16. When the conductive sheet 15 and the external wire 26 are in contact, torque is applied according to the existing technical standards to make them close to each other. At the same time, the fixing ring 19 on the fixing column is also close to the conductive sheet 15 and the external wire 26.

[0048] 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 cover plate 1 to achieve fixed position, 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 heat sink 2 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 heat sink 2, which are all made of metal with very strong hardness, they can resist large torque, while the cover plate 1 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.

[0049] Compared with the prior art, the base cover 15 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.

[0050] 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 vertical controller structure for a servo motor, comprising a cover plate, a heat sink and a controller chip device mounting box, wherein a capacitor mounting slot is arranged at the front end of the heat sink, and characterized in that: The middle part of the heat sink is a hollow structure, and a controller chip mounting box fixing position is arranged on the upper surface of the heat sink; A vertical baffle is provided at a fixed position of the controller chip mounting box of the heat sink; A drainage cooling strip is arranged on the back surface of the heat sink and the back surface of the vertical baffle, and a channel is formed by the drainage cooling strip and the back surface of the heat sink; The controller chip device installation box is placed in a fixed position of the controller chip installation box and the heat dissipation surface at the bottom of the controller chip device installation box is tightly fixed to the vertical baffle; The cover plate and the heat sink plate cooperate to wrap the controller chip device installation box; The controller chip is arranged in the controller chip device installation box, two phase current connecting pieces are arranged on one side of the controller chip device installation box, and two elastic conductive connecting pieces are symmetrically arranged on the other side of the controller chip device installation box, and the elastic conductive connecting pieces are used to connect the adjacent controller chip device installation boxes and the capacitor elements in the capacitor installation slots; The end of the elastic conductive connecting piece is a sloped structure, the end surface of one elastic conductive connecting piece of the controller chip device installation box is flat, and a contact protrusion is arranged on the end surface of the other elastic conductive connecting piece; The cover plate is connected to the heat sink or the capacitor installation slot by bolts or hinges and is insulated from each other. The cover plate is insulated as a whole and a conductor sheet for connecting the controller chip or the positive electrode of the controller chip capacitor is arranged inside the cover plate; the conductor sheet is pre-buried in the cover plate and its output end is exposed; A fixing column is embedded in the cover plate at the output end of the conductor sheet, the output end of the conductor sheet is sleeved on the fixing column, and an external wire connected to the controller chip or the positive electrode of the controller chip capacitor is sleeved on the fixing column to achieve the connection and fixation of the external wire and the conductor sheet; The upper part of the fixing column is a threaded structure, and the nut cooperates with the fixing column so that the conductor sheet sleeved on the fixing column and the external wire are in stable contact with each other; A supporting circular plate is arranged at the lower part of the fixed column, and the supporting circular plate is entirely embedded in the cover plate with the upper surface exposed; The upper surface of the supporting circular plate is higher than the upper surface of the surrounding cover plates; A fixing ring is arranged at the bottom end of the fixing column and the fixing ring is wrapped by the cover plate so that the outside of the fixing ring is insulated, a bolt hole is arranged on the heat sink corresponding to the position of the fixing ring, a bolt 1 passes through the fixing ring and is connected with the bolt hole, so that the middle part of the fixing ring is fixed to the cover plate, and the bottom part is fixed to the heat sink through the bolt 1 and is insulated from each other; A sleeve is arranged in the hollow position in the middle of the fixing ring, and the sleeve is embedded in the cover plate around the fixing ring, and the bolt passes through the sleeve and then matches with the bolt hole; A sawtooth bar parallel to the axis of the sleeve is arranged on the outer surface of the sleeve, and a shallow groove ring is arranged on the outer surface of the sleeve, and the sawtooth bar and the shallow groove ring are staggered with each other; The fixing column, the supporting circular plate and the fixing ring are integrally cast to form a whole.

2. The vertical controller structure of a servo motor according to claim 1, characterized in that: The channels on the back surface of the heat dissipation plate are distributed in a fan shape along the hollow structure; the channels on the back surface of the vertical baffle are distributed vertically.

3. The vertical controller structure of a servo motor according to claim 1, characterized in that: A layer of heat-conducting glue is arranged between the controller chip device mounting box and the fixing position of the controller chip mounting box and the vertical baffle.

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