Motor protective case

Abstract

The present invention discloses a motor protective shell, which belongs to the field of motor technology. The present invention has a flow guide assembly installed on the non-transmission end cover; the flow guide assembly includes a flow guide cover, a flow guide column, a plurality of conductive components and an adjustment assembly; a shaft groove is provided at the end of the motor shaft coaxially; the flow guide column is installed on the inner side of the flow guide cover; a plurality of conductive components are slidably installed on the side of the flow guide column; an adjustment groove is provided at the end of the flow guide column coaxially and the adjustment groove passes through the flow guide cover; an adjustment assembly for adjusting the contact area between the conductive component and the motor shaft is installed in the adjustment groove. The present invention is provided with a flow guide cover, a flow guide column, a plurality of conductive components and an adjustment assembly; at the same time, the adjustment assembly includes an adjustment column and a drive block; bolts of increasing size are sequentially threadedly connected with the screw holes on the drive block from the inside to the outside, 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, thereby achieving a better balance state.

Description

Technical Field

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

[0002] During actual use, variable-frequency powered motors are susceptible to shaft current corrosion, often due to common-mode voltage coupling to the bearing oil film and high-frequency magnetic flux asymmetry. To mitigate the effects of shaft current on motor operation, existing technologies employ a current guide assembly installed on the motor housing to direct the shaft current to the non-drive end cover and grounding wire on the motor base. This diversion prevents the shaft current from flowing through the bearings and potentially corroding them, effectively protecting 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 is actually troublesome 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 order to ensure the drainage effect while avoiding large resistance in actual use, 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. To this end, the present invention provides a motor protective case. Summary of the Invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a motor protective shell, which is provided with a guide cover, a guide column, several 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 large resistance; and solves the technical problems raised in the background technology.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: The present invention provides a motor protective case, comprising a housing body and a transmission end cover and a non-transmission end cover mounted at both ends of the housing body, wherein a motor shaft is rotatably mounted between the transmission end cover and the non-transmission end cover, and a flow guide assembly is mounted on the non-transmission end cover; the flow guide assembly comprises a flow guide cover, a flow guide column, a plurality of conductive components, and an adjustment component; an axis groove is coaxially provided at the end of the motor shaft;

[0006] 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; several 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.

[0007] 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.

[0008] Preferably, the adjustment assembly includes an adjusting column, a positioning cap and a driving block; the positioning cap is coaxially installed at one end of the adjusting column; the adjusting column is installed in the adjusting groove and the positioning cap is matched and installed in the notch of the adjusting groove; a plurality of strip grooves are evenly distributed on the circumference of the adjusting column and the strip grooves pass through the positioning cap; a plurality of driving blocks are slidably installed in the strip grooves and screw holes are provided on the side surfaces of the driving blocks; the sizes of the screw holes on the plurality of driving blocks in the same strip groove gradually decrease from the outside to the inside, so that the adjusting screw passes through the screw hole on the outside and drives the driving block on the inside to move forward and backward.

[0009] 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 adjustment column is provided at the end of the conductive seat.

[0010] 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.

[0011] 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 open end of the adjustment slot.

[0012] Preferably, a punched cone head is provided at the end of the adjusting column.

[0013] Preferably, the conductor material is conductive fiber; the conductive fiber is one of carbon black fiber, conductive metal compound fiber and conductive polymer fiber.

[0014] The beneficial effects of the present invention are:

[0015] The present invention is provided with a guide cover, a guide column, several conductive part components and an adjustment component; at the same time, the adjustment component includes an adjustment column and a drive block; bolts of increasing sizes are sequentially threadedly connected with the screw holes on the drive block from the inside to the outside, 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

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0017] Figure 1 The present invention provides a structural schematic diagram of a motor protection case.

[0018] Figure 2 Schematic diagram of the structure of the flow guide assembly in the present invention.

[0019] Figure 3 for Figure 2 rear view.

[0020] Figure 4 for Figure 3 Cross-sectional view of AA in the figure.

[0021] Figure 5 for Figure 2 Right view of .

[0022] Figure 6 for Figure 5 Cross-sectional view of the BB.

[0023] Figure 7 It is a structural schematic diagram of the adjustment component in the present invention.

[0024] Figure 8 It is a structural schematic diagram of the guide cover and the guide column in the present invention.

[0025] Figure 9 Schematic diagram of the structure of the conductive part assembly in the present invention.

[0026] Figure 10 Schematic diagram of the structure of the driving block in the present invention.

[0027] Explanation of the accompanying drawings: 1-casing body, 11-transmission end cover, 12-non-transmission end cover, 2-motor shaft, 21-shaft slot, 3-guide cover, 4-guide column, 41-adjusting slot, 411-limiting slot, 42-stepped hole, 51-conductor, 52-conductive seat, 521-conductive slot, 522-limiting block A, 523-inclined surface, 524-arc surface, 53-spring, 61-adjusting column, 611-bar slide, 612-limiting slide, 613-punched cone head, 62-positioning cap, 621-limiting block C, 63-driving block, 631-screw hole, 632-limiting block B. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0029] Example 1:

[0030] 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 the 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 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 related components such as the stator inside the motor, so it is not shown in the figure, and only related components are shown.

[0031] 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 flowed through the motor shaft 2, the bearing, the transmission end cover 11 and the non-transmission end cover 12 is conducted through 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; this avoids the shaft current flowing through the bearing and causing electrical corrosion of the bearing, extends the service life of the bearing, and improves the reliability of the motor; at the same time, in order to ensure that the resistance of the guide component is relatively low, 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 effect when the conductor 51 contacts the motor shaft 2.

[0032] See also Figure 4 、 Figure 5as well as Figure 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 adjustment groove 41, and the adjustment assembly located in the adjustment 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.

[0033] See also Figure 6 、 Figure 7 as well as Figure 10 As shown, the adjustment assembly includes an adjustment column 61, a positioning cap 62 and a drive 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 facilitates punching open the conductive seat 52 in the adjustment groove 41. The adjusting column 61 is annularly and evenly distributed with several strip slide grooves 611 around the side, 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 match with the limit slots 411 to achieve the following correspondence between the positions of the strip slide grooves 611 and the several conductive component components in the same row; that is, the positions of the several conductive component components in the same row correspond to the several driving blocks 63 in the same row; specifically, limit blocks B632 are symmetrically provided on both sides of the driving block 63; limit slots 612 are symmetrically provided on both sides of the strip slide groove 611; the limit blocks B632 are slidably installed in the limit slide grooves 612, and are slidably installed in the limit slide grooves 612 through the limit blocks B632, so as to ensure that the driving block 63 can slide stably along the strip slide groove 611, thereby driving the 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 that matches 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.

[0034] Several driving blocks 63 are slidably installed in the strip-shaped slide groove 611, and screw holes 631 are provided on the side of the driving blocks 63; the sizes of the screw holes 631 on several 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, first, several driving blocks 63 are slidably installed in the strip slide 611. The number of driving blocks 63 in the same strip slide 611 is the same as the number of conductive 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 several driving blocks 63 in the same strip slide 611 gradually decreases from the outside to the inside; in this way, when adjusting the sliding of the driving block 63, you can first use a thinner bolt to thread it with the screw hole 631 on the innermost driving block 63, so that the bolt can pass through the screw hole 631 on the outer side and thread it with the innermost driving block, and then drive the innermost driving block 63 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; 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 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 open end of the positioning cap 62 to prevent rainwater from entering.

[0035] The present invention is provided with a guide cover 3, a guide column 4, several conductive components and an adjustment component; at the same time, 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 large resistance, and achieving a better balance state; it is convenient and practical.

[0036] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A motor protective case, 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: A flow guide assembly is installed on the non-transmission end cover (12); the flow guide assembly includes a flow guide cover (3), a flow guide column (4), a plurality of conductive components and an adjustment component; a shaft groove (21) is provided coaxially at the end of the motor shaft (2); 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 the 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); the adjustment component for adjusting the contact area between the plurality of the conductive component assemblies and the motor shaft (2) is mounted in the adjustment groove (41); The conductive part assembly includes a conductor (51) and a conductive seat (52); a plurality of stepped holes (42) are uniformly distributed in a circular pattern 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); The adjustment assembly 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 sliding grooves (611) are evenly distributed on the circumference of the adjustment column (61) and the strip-shaped sliding grooves (611) pass through the positioning cap (62); a plurality of the driving blocks (63) are slidably mounted in the strip-shaped sliding grooves (611) 63) and a screw hole (631) is provided on the side of the driving block (63); 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, so that the adjusting screw drives the driving block (63) located on the inside to move forward and backward after passing through the screw hole (631) located on the outside; bolts of increasing size are sequentially threadedly connected with the screw holes (631) on the driving blocks (63) from the inside to the outside, so as to adjust the number of the conductors (51) in contact with the motor shaft (2) one by one, so as to adjust the contact area; Inclined surfaces (523) are provided on both sides of the end of the conductive seat (52); and an arcuate surface (524) matching the outer side surface of the regulating column (61) is provided at the end of the conductive seat (52).

2. A motor protective case according to claim 1, characterized in that: Limiting blocks B (632) are symmetrically provided on both sides of the driving block (63); limiting sliding grooves (612) are symmetrically provided on both sides of the strip-shaped sliding groove (611); and the limiting blocks B (632) are slidably installed in the limiting sliding grooves (612).

3. A motor protective case according to claim 2, characterized in that: Limit blocks C (621) are symmetrically provided on both sides of the exterior of the positioning cap (62); and limiting notches (411) are symmetrically provided on the open end of the adjustment slot (41).

4. A motor protective case according to claim 3, characterized in that: The end of the regulating column (61) is provided with a punched cone head (613).

5. The motor protective case according to claim 4, 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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