A controller structure for a motor

Abstract

The present invention discloses a controller structure for a motor, including a base body, a base cover, and a controller chip mounting box. The base body is a conductor structure with a cavity, and its bottom is grounded. The controller chip mounting box is fixed inside the base body, and the negative lead-out wire of the controller chip is connected to the base body. The base cover is connected to the base body by bolts or screws and is insulated from each other. The base cover is integrally insulated, and a conductor sheet for connecting the positive electrode of the controller chip is provided inside the base cover. The processing technology of the present invention is simple, the installation is convenient, and it has strong versatility and higher stability.

Description

Technical Field

[0001] The present invention relates to a controller structure for a motor, belonging 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 it can be two three-phase AC motors, thus forming six input terminals), a controller is always arranged between the servo motor and the driving end to rectify the output of the servo motor, control the power magnitude or the opening / closing of the output, etc.

[0003] Some existing simple controllers (or called PS machines) can only rectify the servo motor. Their structure includes two bases, and the two bases are integrally cast with metal materials. The two bases are insulated from each other, one of the bases is grounded, and a rectifier bridge control element composed of diodes is arranged on the other base. The negative extreme of the control element is connected to the grounded base, and the positive extreme (conductor sheet structure) of the control element is also connected to the external wire through the connecting column on the corresponding base. In order to ensure the stable connection between the positive extreme of the control element and the external wire on the connecting column, a nut needs to be sleeved on the connecting column, and a torque (the torque magnitude refers to the prior art standard) is used to tightly attach the connection end of the positive extreme of the control element to the external wire. Therefore, the connecting column must be fixedly connected to the base (that is, the connecting column cannot have vertical displacement or horizontal offset). However, the materials of the connecting column and the base provided with the control element 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 above torque (in the prior art, generally, the connecting column is fixed to the base through a rivet in the through hole on the base), which easily causes looseness or offset between the connection part and the base due to vibration or other external factors in the later stage, resulting in unstable connection between the control element and the external wire, and thus unable to normally control the servo motor. Summary of the Invention

[0004] The purpose of the present invention is to provide a controller structure for a motor, which completely changes the existing design structure to overcome the deficiencies of the prior art.

[0005] Technical Solution of the Present Invention

[0006] A controller structure for a motor, which includes a base, a base cover, and a controller chip installation box;

[0007] The base is a conductor structure with a cavity, and its bottom is grounded;

[0008] The controller chip installation box is fixed in the base and is fixed, and the negative lead-out wire of the controller chip is connected to the base;

[0009] The base cover is connected to the base body by bolts or screws and is insulated from each other. The base cover is integrally insulated, and a conductor sheet for connecting the positive pole of the controller chip is provided inside the base cover;

[0010] The conductor sheet is embedded in the base cover and its output end is exposed.

[0011] Preferably, the bottom of the controller chip installation box has a conductive aluminum sheet structure, which is connected to the negative pole of the controller chip. A bolt groove is provided on the base body beside the controller chip installation box, and the bolt groove is integrally formed with the base body and has a conductive function. The bolt passes through the aluminum sheet structure and is tightened in the bolt groove, so that the negative pole of the controller chip in the controller chip installation box is connected to the base body in sequence through the aluminum sheet structure, the bolt, and the bolt groove to form a ground connection.

[0012] Preferably, fixing posts are embedded at the base cover at the output end of the conductor sheet. The output end of the conductor sheet is sleeved on the fixing posts, and the external wire for connecting to the positive pole of the controller chip is sleeved on the fixing posts to realize the connection and fixation between the external wire and the conductor sheet.

[0013] Preferably, the upper part of the fixing post has a threaded structure, and the nut cooperates with the fixing post so that the conductive sheet and the external wire sleeved on the fixing post are in stable contact with each other.

[0014] Preferably, a support circular plate is provided at the lower part of the fixing post. The support circular plate is integrally embedded in the base cover and its upper surface is exposed.

[0015] Preferably, the upper surface of the support circular plate is higher than the upper surface of the base cover around it.

[0016] Preferably, a fixing ring is provided at the bottom end of the fixing post, and the fixing ring is wrapped by the base cover so that the outside of the fixing ring is insulated. A bolt hole is provided on the base body corresponding to the position of the fixing ring. The bolt passes through the fixing ring and is connected in cooperation with the bolt hole to realize the fixation of the middle part of the fixing ring to the base cover. Its bottom is fixed to the base body by the bolt and is insulated from each other.

[0017] Preferably, a sleeve is provided at the hollow position in the middle of the fixing ring. The sleeve is embedded in the base cover around the fixing ring, and the bolt passes through the sleeve and then is connected in cooperation with the bolt hole.

[0018] Preferably, a sawtooth rack 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. The sawtooth rack and the shallow groove ring are staggered with each other.

[0019] Due to the adoption of the above technical solution, compared with the prior art, the processing technology of the present invention is simple, the installation is convenient, and moreover, the universality is strong and the stability is higher. Brief Description of the Drawings

[0020] Attached Figure 1 is a structural schematic diagram of the present invention;

[0021] Attached Figure 2 For attached Figure 1 Attachment at the fixed column in Figure 1 Cross-sectional view;

[0022] Attached Figure 3 Schematic structural view of the matrix in the present invention;

[0023] Attached Figure 4 Schematic structural view of the controller chip mounting box in the present invention;

[0024] Attached Figure 5 Schematic structural view of the aluminum sheet in the present invention;

[0025] Attached Figure 6 Schematic structural view of the sleeve in the present invention;

[0026] Attached Figure 7 Schematic connection diagram of the present invention with external wires;

[0027] Attached Figure 8 For attached Figure 7 Cross-sectional view of the cooperation between the fixed ring and bolt 1 in

[0028] The marks in the attached drawings are: 1 - matrix, 2 - base cover, 3 - controller chip mounting box, 4 - conductor sheet, 5 - aluminum sheet structure, 6 - bolt groove, 7 - bolt, 8 - fixed column, 9 - fixed ring, 10 - bolt hole, 11 - bolt 1, 12 - nut, 13 - supporting circular plate, 14 - sleeve, 15 - sawtooth rack, 16 - shallow groove ring, 17 - connection end, 18 - through hole, 19 - convex platform, 20 - external wire, 21 - upper surface, 22 - gap. Detailed implementation manners

[0029] The present invention will be further described in detail below with reference to the attached drawings, but it shall not be construed as any limitation to the present invention.

[0030] As shown in the attached Figures 1-8As shown in the figure, a controller structure of an electric motor according to the present invention includes a base body 1, a base cover 2, and a controller chip mounting box 3; the base body 1 is a conductive structure with a cavity, and its bottom is grounded; the controller chip mounting box 3 is fixed inside the base body 1 and is fixed, and the negative lead-out wire of the controller chip is connected to the base body 1; the base cover 2 is connected to the base body 1 by bolts or screws and is insulated from each other. The base cover 2 is integrally insulated, and a conductive sheet 4 for connecting the positive electrode of the controller chip is provided inside the base cover 2; the conductive sheet 4 is embedded in the base cover 2 and its output end is exposed (wherein the specific structures of the base body 1, the base cover 2, and the controller chip mounting box 3 in this embodiment can refer to the patent document submitted on the same day as this application, patent name: An installation structure of a power electronic device of an electric motor, applicant: Guizhou Yaguang Electronic Technology Co., Ltd.). The controller chip mounting box 3 is placed on the connection end 17 that cooperates with the controller chip mounting box 3 in the base body 1. The base body 1 is integrally cast from a conductive metal (generally cast from aluminum), the base cover 2 is integrally cast from an insulating plastic material, and the conductive sheet 4 is placed in the base cover 2 and integrally cast by a mold, and its input end and output end are both exposed respectively.

[0031] In the prior art, the two base bodies are also integrally cast from aluminum. The reason why the upper base body is not made of plastic casting is mainly that the connecting columns in the prior art (the connecting columns are all made of metals with extremely strong conductivity, such as aluminum or copper, etc.) need to be fixedly connected to it. If the base body is made of plastic and connected to the connecting column, under the action of torque, it is very difficult for the connecting column and the base body to bear the torque. Therefore, the upper base body generally needs to be made of a metal with higher hardness, and then the connecting column is fixed in the connecting hole of the upper base body by means of rivets. However, its connection method is still unreliable. The two metal parts are only fixed by mechanical pre-tightening (the deformation of the rivets). During the long-term use in the later stage, it is easy to cause loosening, thus making the connection here unreliable.

[0032] The bottom of the controller chip mounting box 3 is an aluminum sheet structure 5 with conductivity, and the aluminum sheet structure 5 is connected to the negative extreme of the controller chip. The connection method is as shown in the figure; the chip is placed into the controller chip mounting box 3. The controller chip mounting box 3 is still made of an insulating plastic material. A through hole 18 is provided at the bottom of the controller chip mounting box 3. The negative extreme of the chip is facing the through hole 18. A connecting boss 19 is provided on the aluminum sheet structure 5. The boss passes through the through hole 18 and is in contact connection with the negative electrode of the chip. Then the aluminum sheet structure 5 is fixed at the bottom of the controller chip mounting box 3 to form an integral body. Then the negative extreme of the chip is connected to the aluminum sheet structure 5. A bolt groove 6 is provided on the base body 1 beside the controller chip mounting box 3, and the bolt groove 6 forms an integral body with the base body and has a conductive function. A bolt 7 passes through the aluminum sheet structure 5 and is tightened in the bolt groove 6, so that the negative electrode of the controller chip in the controller chip mounting box 3 is connected to the base body 1 in sequence through the aluminum sheet structure 5, the bolt 7, and the bolt groove 6 and is grounded.

[0033] At the base cover 2 at the output end of the conductor sheet 4, a fixing post 8 is embedded. The output end of the conductor sheet 4 is sleeved on the fixing post 8. The external wire for connecting to the positive pole of the controller chip is sleeved on the fixing post 8 to realize the connection and fixation between the external wire and 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 to make the conductive sheet 4 and the external wire 20 sleeved on the fixing post 8 contact each other stably. At the lower part of the fixing post 8, a supporting circular plate 13 is provided. The whole of the supporting circular plate 13 is embedded in the base cover 2 and its upper surface is exposed. The upper surface 21 of the supporting circular plate 13 is higher than the upper surface of the base cover 2 around its vicinity. By setting the supporting circular plate 13, firstly, the contact area between the fixing post 8 and the base cover 2 can be increased, making the fixation of the base cover 2 on it reliable; at the same time, by setting the upper surface 21 of the supporting circular plate 13, when the nut 12 is tightened, it can ensure that the conductor sheet 4 is tightly connected to the external wire 20. At the same time, when the conductor sheet 4 is connected to the external wire 20, the conductor sheet 4 and the external wire 20 can also be connected through the supporting circular plate 13, the nut 12 and the fixing post 8.

[0034] A fixing ring 9 is arranged at the bottom end of the fixing post 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 arranged on the base body 2 corresponding to the position of the fixing ring 9. The bolt 11 passes through the fixing ring 9 and is connected with the bolt hole 10 in a matching way to realize the fixation of the middle part of the fixing ring 9 and the base cover 2. Its bottom is fixed to the base body 1 through the bolt 11 and is insulated from each other. A sleeve 14 is arranged 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 inside of the sleeve 14 and then cooperates with the bolt hole 10. A sawtooth rack 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. The sawtooth rack 15 and the shallow groove ring 16 are staggered with each other. By setting the sawtooth rack 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.

[0035] In this embodiment, the fixing post 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 torque received) are integrally cast and formed into one body. After the fixing post 8 adopts this structure, when the base cover 2 is cast with an insulating material, integral casting is adopted (at this time, the conductive sheet 4 is also cast together and the conductive sheet 4 is sleeved on the fixing post 8), so that the threaded structure part of the fixing post 8, the upper surface 21 of the supporting circular plate and the hollow part of the sleeve 14 are exposed, while the rest are all covered by the base cover 2 (including the gap 22 between the fixing ring 9 and the sleeve 14 is filled with the insulating material forming the base cover 2). A bolt hole 10 is arranged on the base body 1 corresponding to the position of the fixing ring 9. The bolt 11 passes through the sleeve 14 and then is screwed into the bolt hole 10 to form an integral body with the base body 1.

[0036] When the external wire 20 is sleeved on the fixing post 8 and is in contact connection with the conductive sheet 4, by screwing the nut 12 onto the fixing post 8, after the conductive sheet 4 and the external wire 20 are in contact, apply torsion (refer to the existing technical standards) to make them closely adhere to each other (meanwhile, the fixing ring 9 on the fixing post also closely adheres to the conductive sheet 4 and the external wire 20).

[0037] When generating torsion, the fixing post 8 is also subjected to torsion. However, since the fixing post 8 is integrally covered by the base cover 2 to achieve position fixation, and plastic is a brittle material with low strength and cannot resist excessive torsion applied to the fixing post (it is easy to break), the torsion received by the fixing post 8 is mainly transmitted from the fixing post 8 to the sleeve 14, then to the first bolt 11, and finally to the base body 1. Since the fixing post 8 (including the fixing ring 9 and the supporting circular plate 13), the sleeve 14, the first bolt 11, and the base body 1 are all made of metal with high hardness, it can resist a large amount of torsion, while the base cover 2 only bears part of the torsion as a whole (the base cover only has the function of restricting the position of the fixing post 8 here), which greatly increases the anti-torsion function of the fixing post and can ensure reliable contact between the controller and the external wire during use.

[0038] Compared with the prior art, the material of the base cover 2 is only made of insulating plastic, which greatly saves costs. The space for installing the chip in the base body is increased, enabling the controller to have more control functions, and at the same time, the output end connection is reliable and stable.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A controller structure for a motor, characterized in that: it includes a base body (1), a base cover (2) and a controller chip mounting box (3); the base body (1) is a conductor structure with a cavity, and its bottom is grounded; the controller chip mounting box (3) is fixed inside and to the base body (1), and the negative lead-out wire of the controller chip is connected to the base body (1); the base cover (2) is connected to the base body (1) by bolts or screws and is insulated from each other. The base cover (2) is integrally insulated, and a conductor sheet (4) for connecting the positive pole of the controller chip is arranged inside the base cover (2); the conductor sheet (4) is embedded in the base cover (2) and its output end is exposed; a fixing post (8) is embedded at the position of 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), and an external wire for connecting to the positive pole of the controller chip is sleeved on the fixing post (8) to realize the connection and fixation of the external wire and the conductor sheet (4); a fixing ring (9) is arranged at the bottom end of the fixing post (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 arranged on the base body (1) corresponding to the position of the fixing ring (9). A bolt one (11) passes through the fixing ring (9) and is in fit connection with the bolt hole (10) to realize the fixation of the middle part of the fixing ring (9) to the base cover (2), and its bottom is fixed to the base body (1) by the bolt one (11) and is insulated from each other; a sleeve (14) is arranged at the hollow position in the middle of the fixing ring (9). The sleeve (14) is embedded on the base cover (2) around the fixing ring (9), and the bolt one (11) passes through the inside of the sleeve (14) and then is in fit with the bolt hole (10); a sawtooth rack (15) parallel to the axis of the sleeve (14) and a shallow groove ring (16) are arranged on the outer surface of the sleeve (14), and the sawtooth rack (15) and the shallow groove ring (16) are staggered with each other.

2. A controller structure for a motor according to claim 1, characterized in that: the bottom of the controller chip mounting box (3) is a conductive aluminum sheet structure (5), and the aluminum sheet structure (5) is connected to the negative extreme of the controller chip. A bolt groove (6) is arranged on the base body (1) beside the controller chip mounting box (3), and the bolt groove (6) is integrally formed with the base body and has a conductive function. A bolt (7) passes through the aluminum sheet structure (5) and is tightened in the bolt groove (6), so that the negative pole of the controller chip in the controller chip mounting box (3) is connected to the base body (1) in sequence through the aluminum sheet structure (5), the bolt (7), and the bolt groove (6) and forms a ground connection.

3. A controller structure for a motor according to claim 1, characterized in that: the upper part of the fixing post (8) is a threaded structure, and a nut (12) is in fit with the fixing post (8) so that the conductor sheet (4) and the external wire sleeved on the fixing post (8) are in stable contact with each other.

4. A controller structure for a motor according to claim 1, characterized in that: a supporting circular plate (13) is arranged at the lower part of the fixing post (8), and the supporting circular plate (13) is integrally embedded in the base cover (2) and its upper surface is exposed.

5. A controller structure for a motor according to claim 4, Characterized in that: The upper surface of the supporting circular plate (13) is higher than the upper surface of the base cover (2) around it nearby.

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