Motor protection shell

Abstract

The invention discloses a motor protection shell, which belongs to the technical field of motors, and is characterized in that a diversion assembly is mounted on a non-transmission end cover; the diversion assembly comprises a diversion cover, a diversion column, a plurality of conductive part assemblies and an adjusting assembly; a shaft groove is coaxially formed in the end part of the motor shaft; the flow guide column is mounted inside the flow guide cover; the conductive part assemblies are slidably mounted on the side surfaces of the diversion columns; an adjusting groove is coaxially formed in the end part of the flow guide column and penetrates through the flow guide cover; an adjusting assembly for adjusting the contact area of the conductive part assembly and the motor shaft is installed in the adjusting groove. The flow guide cover, the flow guide column, the plurality of conductive part assemblies and the adjusting assembly are arranged; meanwhile, an adjusting column and a driving block are arranged in the adjusting assembly; bolts with the sizes from small to large are sequentially in threaded connection with the screw holes in the driving blocks from inside to outside, the number of the electric conductors making contact with the motor shaft can be adjusted one by one, the contact area is adjusted, the drainage effect is guaranteed, large resistance is avoided, and a good balance state is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a motor protective shell. Background Art

[0002] During the actual use of variable frequency power supply motors, shaft currents are prone to corrode motor bearings due to the coupling of common mode voltage to the bearing oil film and high frequency magnetic flux asymmetry. In order to eliminate the influence of shaft currents on motor operation, the prior art provides a flow guide component on the motor housing to guide the shaft current to the non-transmission end cover and the grounding wire on the motor base, thereby guiding the shaft current out, thus preventing the shaft current from flowing through the bearings and corroding the bearings, and achieving good protection for the motor.

[0003] When the above-mentioned existing flow guide assembly is used, the contact area between the drainage conductive column and the motor shaft cannot be conveniently and effectively adjusted, which actually brings troubles in practice; because the larger the contact area between the drainage conductive column and the motor shaft, the better the drainage effect; but paradoxically, the larger the contact area, the greater the resistance to the motor shaft; therefore, in actual use, in order to ensure the drainage effect and avoid large resistance, it is necessary to adjust the contact area between the drainage conductive column and the motor shaft in actual use to achieve a better balance state. To this end, the present invention provides a motor protective shell. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a motor protection case, which is provided with a guide cover, a guide column, a plurality of conductive part components and an adjustment component; at the same time, the adjustment component includes an adjustment column and a drive block, which can realize the adjustment of the number of conductors in contact with the motor shaft one by one to adjust the contact area, thereby ensuring the drainage effect and avoiding greater resistance; and solves the technical problems raised in the background technology.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: the present invention provides a motor protection case, comprising a case body and a transmission end cover and a non-transmission end cover installed at both ends of the case body, a motor shaft is rotatably installed between the transmission end cover and the non-transmission end cover, and a flow guide component is installed on the non-transmission end cover; the flow guide component comprises a flow guide cover, a flow guide column, a plurality of conductive part components and an adjustment component; an axis groove is coaxially provided at the end of the motor shaft; The guide column is coaxially installed on the inner side of the guide cover; the guide cover is installed on the outer side of the non-transmission end cover and the guide column is installed in the shaft groove; a number of conductive components are slidably installed on the side of the guide column; an adjustment groove is coaxially provided at the end of the guide column and the adjustment groove passes through the guide cover; the adjustment component for adjusting the contact area between the several conductive components and the motor shaft is installed in the adjustment groove.

[0006] Preferably, the conductive part assembly includes a conductor and a conductive seat; a plurality of stepped holes are evenly distributed in a ring around the guide column; the conductor is installed in a conductive groove opened at the front end of the conductive seat; limit blocks A are symmetrically provided on both sides of the conductive seat; the conductive seat is slidably installed in the narrow part of the stepped hole; the limit block A is slidably installed in the wide part of the stepped hole; the limit block A is connected to the wide part of the stepped hole by a spring.

[0007] Preferably, the adjustment assembly includes an adjustment column, a positioning cap and a driving block; the positioning cap is coaxially installed at one end of the adjustment column; the adjustment column is installed in the adjustment groove and the positioning cap is matched and installed in the notch of the adjustment groove; a plurality of strip-shaped grooves are evenly distributed on the circumference of the adjustment column and the strip-shaped grooves pass through the positioning cap; a plurality of driving blocks are slidably installed in the strip-shaped grooves and screw holes are provided on the sides of the driving blocks; the sizes of the screw holes on the plurality of driving blocks in the same strip-shaped groove gradually decrease from the outside to the inside, so that the adjustment screw passes through the screw hole on the outside and drives the driving block on the inside to move forward and backward.

[0008] Preferably, inclined surfaces are provided on both sides of the end of the conductive seat; and an arc-shaped surface matching the outer side surface of the adjusting column is provided at the end of the conductive seat.

[0009] Preferably, limit blocks B are symmetrically provided on both sides of the driving block; limit slide grooves are symmetrically provided on both sides of the strip slide groove; and the limit blocks B are slidably installed in the limit slide grooves.

[0010] Preferably, limit blocks C are symmetrically provided on both sides of the exterior of the positioning cap; and limit notches are symmetrically provided on the opening end of the adjustment slot.

[0011] Preferably, a punched cone head is provided at the end of the adjusting column.

[0012] Preferably, the conductor material is conductive fiber; the conductive fiber is one of carbon black fiber, conductive metal compound fiber and conductive polymer fiber.

[0013] The beneficial effects of the present invention are: The present invention provides a guide cover, a guide column, a plurality of conductive part components and an adjustment component; the adjustment component includes an adjustment column and a drive block; bolts with sizes from small to large are threadedly connected with the screw holes on the drive block from the inside to the outside in sequence, so that the number of conductors in contact with the motor shaft can be adjusted one by one to adjust the contact area, thereby ensuring the drainage effect and avoiding large resistance, achieving a better balance state, and being convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 The present invention provides a schematic diagram of the structure of a motor protection shell.

[0016] Figure 2 It is a schematic diagram of the structure of the flow guide component in the present invention.

[0017] Figure 3 for Figure 2 Rear view of.

[0018] Figure 4 for Figure 3 Sectional view of AA.

[0019] Figure 5 for Figure 2 Right view of .

[0020] Figure 6 for Figure 5 Cross-sectional view of BB.

[0021] Figure 7 It is a schematic diagram of the structure of the regulating component in the present invention.

[0022] Figure 8 It is a schematic structural diagram of the guide cover and the guide column in the present invention.

[0023] Fig. 9 It is a schematic structural diagram of the conductive part assembly in the present invention.

[0024] Fig.10 It is a schematic diagram of the structure of the driving block in the present invention.

[0025] Explanation of the accompanying drawings: 1-casing body, 11-transmission end cover, 12-non-transmission end cover, 2-motor shaft, 21-shaft groove, 3-guide cover, 4-guide column, 41-adjusting groove, 411-limiting notch, 42-step hole, 51-conductor, 52-conductive seat, 521-conductive groove, 522-limiting block A, 523-inclined surface, 524-arc surface, 53-spring, 61-adjusting column, 611-strip slide groove, 612-limiting slide groove, 613-punched cone head, 62-positioning cap, 621-limiting block C, 63-driving block, 631-screw hole, 632-limiting block B. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1: like Figures 1 to 10 As shown, the present invention provides a motor protective case, comprising a casing body 1 and a transmission end cover 11 and a non-transmission end cover 12 installed at both ends of the casing body 1, wherein a motor shaft 2 is rotatably installed between the transmission end cover 11 and the non-transmission end cover 12; a guide assembly is installed on the non-transmission end cover 12; the guide assembly comprises a guide cover 3, a guide column 4, a plurality of conductive component components and an adjustment assembly; an axial groove 21 is coaxially provided at the end of the motor shaft 2; the guide column 4 is coaxially and integrally installed on the inner side of the guide cover 3; the guide cover 3 is installed on the outer side of the non-transmission end cover 12 and the guide column 4 is installed in the axial groove 21; the shape of the guide cover 3 can be a regular circle, square, or irregular shape, and the guide cover 3 can be fixed to the non-transmission end cover 12 by screws, and the guide cover 3 and the non-transmission end cover 12 can form a closed chamber; the technical solution in the present invention does not involve relevant components such as the stator inside the motor, so it is not shown in the figure, and only relevant components are shown.

[0028] Several of the conductive components are slidably installed on the side of the guide column 4; an adjustment groove 41 is coaxially provided at the end of the guide column 4 and the adjustment groove 41 passes through the guide cover 3; the adjustment component for adjusting the contact area between several of the conductive components and the motor shaft 2 is installed in the adjustment groove 41. In this embodiment, since the resistance of the guide cover 3, the guide column 4 and several conductive components is very small, the shaft current that originally flows through the motor shaft 2, the bearing, the transmission end cover 11 and the non-transmission end cover 12 is transmitted from the motor shaft 2, the conductive component, the guide column 4 and the guide cover 3, and flows out through the non-transmission end cover 12; the shaft current flowing through the bearing to cause electrical corrosion of the bearing is avoided, the service life of the bearing is extended, and the reliability of the motor is improved; at the same time, in order to ensure that the resistance of the guide component is small, in this embodiment, except that the conductor 51 mentioned below is made of conductive fiber, the conductive component, the guide column 4 and the guide cover 3 are all made of copper; of course, other conductive materials with lower resistance can also be used according to actual needs; the conductive fiber used by the conductor 51 is one of carbon black fiber, conductive metal compound fiber and conductive polymer fiber, so as to ensure better conduction when the conductor 51 contacts the motor shaft 2.

[0029] See also Figure 4 , Figure 5 as well as Fig. 9 As shown, the conductive part assembly includes a conductor 51 and a conductive seat 52; a plurality of stepped holes 42 are evenly distributed in a ring around the guide column 4; the conductor 51 is installed in a conductive groove 521 opened at the front end of the conductive seat 52; limit blocks A522 are symmetrically provided on both sides of the conductive seat 52; the conductive seat 52 is slidably installed in the narrow part of the stepped hole 42; the limit block A522 is slidably installed in the wide part of the stepped hole 42; the limit block A522 is connected to the wide part of the stepped hole 42 by a spring 53; in fact, the conductive seat 52 of the conductive part assembly extends into the adjusting groove 41, and the adjusting assembly located in the adjusting groove 41 can drive the conductive part assembly to slide outward or inward along the stepped hole 42 to realize the contact and separation of the conductive part assembly and the motor shaft 2, which is convenient and practical.

[0030] See also Figure 6 , Figure 7 as well as Fig.10 As shown, the adjustment component includes an adjustment column 61, a positioning cap 62 and a driving block 63; the positioning cap 62 is coaxially installed at one end of the adjustment column 61; the adjustment column 61 is installed in the adjustment groove 41 and the positioning cap 62 is matched and installed in the notch of the adjustment groove 41; specifically, a punching cone head 613 is provided at the end of the adjustment column 61, and the punching cone head 613 is convenient for punching open the conductive seat 52 in the adjustment groove 41. A plurality of strip slide grooves 611 are evenly distributed in an annular manner around the adjusting column 61, and the strip slide groove 611 passes through the positioning cap 62; specifically, limit blocks C621 are symmetrically provided on both sides of the outside of the positioning cap 62; the open end of the adjusting slot 41 is symmetrically provided with limit slots 411, and the limit blocks C621 are matched with the limit slots 411 to achieve the corresponding positions of the strip slide grooves 611 and the plurality of conductive component components in the same column; that is, the plurality of conductive component components in the same column correspond to the plurality of driving blocks 63 in the same column; specifically, limit blocks B632 are symmetrically provided on both sides of the driving block 63; limit slide grooves 612 are symmetrically provided on both sides of the strip slide groove 611; the limit blocks B632 are slidably installed in the limit slide groove 612, and are slidably installed in the limit slide groove 612 by the limit blocks B632, so as to ensure that the driving block 63 can slide stably along the strip slide groove 611, thereby achieving the driving conductive component to slide outward. Furthermore, inclined surfaces 523 are provided on both sides of the end of the conductive seat 52 to facilitate the driving block 63 to drive the conductive seat 52 to slide outward; the end of the conductive seat 52 is provided with an arc surface 524 matching the outer side surface of the adjustment column 61 to ensure that the conductive seat 52 is in stable contact with the outer side surface of the adjustment column 61.

[0031] A plurality of driving blocks 63 are slidably installed in the strip-shaped slide groove 611, and screw holes 631 are provided on the sides of the driving blocks 63; the sizes of the screw holes 631 on the plurality of driving blocks 63 in the same strip-shaped slide groove 611 gradually decrease from the outside to the inside, so that the adjusting screw passes through the screw hole 631 on the outside and drives the driving block 63 on the inside to move forward and backward. In actual use, firstly, a plurality of driving blocks 63 are slidably installed in the strip-shaped slide groove 611. The number of driving blocks 63 in the same strip-shaped slide groove 611 is the same as the number of conductive component components in the same row, so that one driving block 63 drives one conductive seat 52; the size of the screw holes 631 on the plurality of driving blocks 63 in the same strip-shaped slide groove 611 gradually decreases from the outside to the inside; in this way, when adjusting the sliding of the driving block 63, a thinner bolt can be first selected to be threadedly connected with the screw hole 631 on the innermost driving block 63, so that the bolt can pass through the screw hole 631 located on the outside and be threadedly connected with the innermost driving block, and then the innermost driving block 63 is driven to slide and push open the conductive seat 52, so that the end of the conductor 51 contacts the motor shaft 2 to adjust the contact area; and then the size of the screw used corresponds to the screw hole 631 on the driving block 63 from the inside to the outside, and the number of the conductors 51 in contact with the motor shaft 2 can be adjusted one by one to adjust the contact area, which is convenient and practical. In addition, when the conductor 51 is worn for too long and has poor effect, the guide cover 3 can be removed by removing the screws and the conductor 51 can be replaced, which is convenient and practical. At the same time, a cover is installed at the opening end of the positioning cap 62 to prevent rainwater from entering.

[0032] The present invention is provided with a guide cover 3, a guide column 4, a plurality of conductive components and an adjustment component; the adjustment component includes an adjustment column 61 and a drive block 63; bolts of increasing sizes are sequentially threadedly connected with the screw holes 631 on the drive block 63 from the inside to the outside, so that the number of conductors 51 in contact with the motor shaft 2 can be adjusted one by one to adjust the contact area, thereby ensuring the drainage effect and avoiding greater resistance, and achieving a better balance state; it is convenient and practical.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A motor protective housing, comprising a housing body (1) and a transmission end cover (11) and a non-transmission end cover (12) mounted at both ends of the housing body (1), wherein a motor shaft (2) is rotatably mounted between the transmission end cover (11) and the non-transmission end cover (12), characterized in that: The non-transmission end cover (12) is provided with a flow guide assembly; the flow guide assembly comprises a flow guide cover (3), a flow guide column (4), a plurality of conductive component assemblies and an adjustment assembly; the end of the motor shaft (2) is provided with a shaft groove (21) coaxially therewith; The guide column (4) is coaxially mounted on the inner side of the guide cover (3); the guide cover (3) is mounted on the outer side of the non-transmission end cover (12) and the guide column (4) is mounted in the shaft groove (21); a plurality of conductive component assemblies are slidably mounted on the side of the guide column (4); an adjustment groove (41) is coaxially provided at the end of the guide column (4) and the adjustment groove (41) passes through the guide cover (3); and an adjustment component for adjusting the contact area between the plurality of conductive component assemblies and the motor shaft (2) is mounted in the adjustment groove (41).

2. A motor protection case as claimed in claim 1, characterized in that: The conductive part assembly comprises a conductor (51) and a conductive seat (52); a plurality of stepped holes (42) are evenly distributed in an annular manner around the guide column (4); the conductor (51) is installed in a conductive groove (521) provided at the front end of the conductive seat (52); limit blocks A (522) are symmetrically provided on both sides of the conductive seat (52); the conductive seat (52) is slidably installed in the narrow part of the stepped hole (42); the limit block A (522) is slidably installed in the wide part of the stepped hole (42); the limit block A (522) is connected to the wide part of the stepped hole (42) via a spring (53).

3. A motor protection case as claimed in claim 2, characterized in that: The adjustment component comprises an adjustment column (61), a positioning cap (62) and a driving block (63); the positioning cap (62) is coaxially mounted on one end of the adjustment column (61); the adjustment column (61) is mounted in the adjustment groove (41) and the positioning cap (62) is matched and mounted in the notch of the adjustment groove (41); a plurality of strip-shaped slide grooves (611) are evenly distributed in an annular manner around the adjustment column (61) and the strip-shaped slide grooves (611) penetrate the positioning cap (62); a plurality of driving blocks (63) are slidably mounted in the strip-shaped slide grooves (611) and screw holes (631) are provided on the side surfaces of the driving blocks (63); the sizes of the screw holes (631) on the plurality of driving blocks (63) in the same strip-shaped slide groove (611) gradually decrease from the outside to the inside, so that the adjustment screw penetrates the screw hole (631) located on the outside and then drives the driving block (63) located on the inside to move forward and backward.

4. A motor protection case as claimed in claim 3, characterized in that: Inclined surfaces (523) are provided on both sides of the end of the conductive seat (52); and an arc-shaped surface (524) matching the outer side surface of the adjustment column (61) is provided at the end of the conductive seat (52).

5. A motor protection case as claimed in claim 4, characterized in that: Limit blocks B (632) are symmetrically provided on both sides of the driving block (63); limit slide grooves (612) are symmetrically provided on both sides of the strip-shaped slide groove (611); and the limit blocks B (632) are slidably mounted in the limit slide grooves (612).

6. A motor protection case as claimed in claim 5, characterized in that: Limit blocks C (621) are symmetrically provided on both sides of the exterior of the positioning cap (62); and limit notches (411) are symmetrically provided on the opening end of the adjustment slot (41).

7. A motor protection case as claimed in claim 6, characterized in that: The end of the adjusting column (61) is provided with a punched cone head (613).

8. A motor protection case as claimed in claim 7, characterized in that: The conductor (51) is made of conductive fiber; the conductive fiber is one of carbon black fiber, conductive metal compound fiber and conductive polymer fiber.

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