Motor protection housing

Abstract

The utility model discloses a motor protection housing, and relates to the technical field of motor protection, the motor protection housing comprises an upper housing and a lower housing, the upper housing and the lower housing are in butt joint, the inner parts of the upper housing and the lower housing are provided with cavities for accommodating a motor, and the same side walls of the upper housing and the lower housing are provided with holes; a plurality of long-strip-shaped through holes are formed in the side walls of the upper shell and the lower shell, first heat dissipation blocks are connected into the long-strip-shaped through holes, and a part of each first heat dissipation block is located outside the upper shell or the lower shell; a groove is formed in the side wall, facing the cavity, of the first heat dissipation block, and a second heat dissipation block is connected into the groove. The motor is wrapped and protected by the first shell and the second shell, heat generated in the working process of the motor is absorbed by the second heat dissipation block and transmitted to the part, located on the outer side of the upper shell and the outer side of the lower shell, of the first heat dissipation block, and heat dissipation is conducted by controlling convection.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor protection technical field, especially in a kind of motor protection shell. BACKGROUND

[0002] Micro motor refers to the diameter less than 160mm or rated power less than 750W motor. Micro motor is often used in control system or transmission mechanical load, for realizing electromechanical signal or energy detection, analytical operation, amplification, execution or conversion function. Since the volume of micro motor is small, the structural strength of micro motor is low, and the outer surface of micro motor is easy to be damaged when subjected to external force, thereby causing damage to micro motor and affecting the normal operation of micro motor.

[0003] In order to solve the above-mentioned prior art, the protective shell is mostly wrapped by a metal or engineering plastic shell, but the heat dissipation performance is poor. UTILITY MODEL CONTENTS

[0004] In order to solve the problems in the prior art, the utility model provides a motor protection shell, which comprises: an upper shell and a lower shell, the upper shell and the lower shell are connected, a cavity for accommodating a motor is formed in the interior of the upper shell and the lower shell, and a plurality of holes are formed in the same side wall of the upper shell and the lower shell.

[0005] A plurality of long-hole-shaped through holes are formed in the side wall of the upper shell and the lower shell, a first heat dissipation block is connected in each long-hole-shaped through hole, and a part of the first heat dissipation block is located outside the upper shell or the lower shell.

[0006] A groove is formed in the side wall of the first heat dissipation block facing the cavity, and a second heat dissipation block is connected in the groove.

[0007] Further, a threading hole is formed in the side wall of the upper shell.

[0008] Further, a clamping piece is connected to the bottom of the upper shell, a clamping groove is formed in the top of the lower shell, and the clamping piece is clamped in the clamping groove when the upper shell and the lower shell are connected.

[0009] Further, elastic clamping plates are connected to the opposite side walls of the opening end of the clamping groove, the elastic clamping plates are located in the clamping groove, and the side walls of the clamping groove are inclined.

[0010] Further, the length of the elastic clamping plate is less than one half of the length of the clamping groove.

[0011] Further, a connecting block is connected to the side wall of the clamping piece, and the connecting block is connected to the bottom of the upper shell.

[0012] Further, the clamping groove is an arc-shaped groove, and the shape of the clamping piece matches the clamping groove.

[0013] Further, the length of the clamping piece is equal to or less than the length of the elastic clamping plate.

[0014] The beneficial effects of the technical scheme provided by the utility model are that: in the utility model, the upper shell and the lower shell are arranged, the motor is located in the upper shell and the lower shell, the side wall of the upper shell and the lower shell is connected with the first heat dissipation block, the side wall of the cavity of the first heat dissipation block is provided with a groove, the second heat dissipation block is connected in the groove, the first shell and the second shell wrap and protect the motor, the heat generated by the motor in operation is absorbed by the second heat dissipation block and is transmitted to the part of the first heat dissipation block located outside the upper shell and the lower shell, and heat dissipation is carried out through air convection.

[0015] In addition, the bottom of the upper shell is connected with the clamping piece, the top of the lower shell is provided with the clamping groove, the clamping piece is clamped in the clamping groove when the upper shell and the lower shell are connected, and the quick connection and disassembly of the upper shell and the lower shell can be realized through the arrangement of the clamping piece and the clamping groove. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of a motor protective shell provided by the utility model;

[0017] Figure 2 is a structural schematic view of an upper shell provided by the utility model;

[0018] Figure 3 is a structural schematic view of a lower shell provided by the utility model;

[0019] Figure 4 is a structural schematic view of a first heat dissipation block provided by the utility model;

[0020] Figure 5 is a structural schematic view of a clamping piece provided by the utility model;

[0021] Figure 6 is a structural schematic view of a clamping groove provided by the utility model;

[0022] Figure 7 is a connection schematic view of the clamping piece and the clamping groove provided by the utility model;

[0023] Figure 8 is a structural schematic view of the first heat dissipation block and the second heat dissipation block provided by the utility model.

[0024] Marked: 1 - upper shell; 2 - lower shell; 3 - opening; 4 - first heat dissipation block; 5 - groove; 6 - second heat dissipation block; 7 - threading hole; 8 - clamping part; 9 - clamping groove; 10 - elastic clamping plate; 11 - connecting block; 12 - spring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0027] It should be noted that in the present embodiment, the positions or relationships indicated by "bottom", "top", "left", "right" and the like are based on the positions or relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0028] It should be further noted that in the present embodiment, unless otherwise explicitly specified and limited, the terms "provided", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] A motor protective shell, comprising an upper shell 1 and a lower shell 2, the upper shell 1 and the lower shell 2 are butted, a cavity accommodating a motor is formed in the interior of the upper shell 1 and the lower shell 2, the shape of the outer side of the upper shell 1 and the lower shell 2 after butting can be square, the cavity structure in the interior of the upper shell 1 and the lower shell 2 matches the shape of the motor to be protected, a plurality of openings 3 are formed in the same side wall of the upper shell 1 and the lower shell 2, for the rotating shaft of the motor to pass through, a plurality of long strip-shaped through holes are formed in the side wall of the upper shell 1 and the lower shell 2, a first heat dissipation block 4 is connected in each long strip-shaped through hole, a part of the first heat dissipation block 4 is located outside the upper shell 1 or the lower shell 2, forming a heat dissipation fin, a groove 5 is formed in the side wall of the first heat dissipation block 4 facing the cavity, and a second heat dissipation block 6 is connected in the groove 5.

[0030] It should be noted that the first heat dissipation block 4 can be silicon nitride ceramic, the thermal conductivity of silicon nitride ceramic is 30-90 W / m·K, the bending strength is 800-1000 MPa, and the fracture toughness is 6-8 MPa·m¹ / ²; the length of the long strip-shaped through hole is 80% of the axial length of the upper shell 1 and the lower shell 2, and 3mm reinforcing ribs are reserved between the through holes to ensure the overall compression strength of the shell; the length and height of the first heat dissipation block 4 match the length and height of the long strip-shaped through hole, and the first heat dissipation block 4 is bonded with the long strip-shaped through hole by high-temperature resistant epoxy adhesive with adaptive thermal expansion coefficient difference; the second heat dissipation block 6 can be a hard heat-absorbing material, such as boron nitride ceramic sheet, and the contact surface of the second heat dissipation block 6 with the motor shell needs to match the curved surface of the motor shell.

[0031] The exposed part of the first heat dissipation block 4 serves as a heat dissipation fin, and the surface can be processed into a wave shape to increase the heat dissipation area; the motor shell can be sprayed with heat-conducting paste (containing boron nitride filler) to reduce the contact thermal resistance.

[0032] It should also be noted that the aperture tolerance of the open hole 3 is +0.05-0.1mm of the shaft diameter, to ensure that the gap between the shaft and the hole is ≤0.1mm, and the deviation between the hole center and the motor bearing seat is ≤0.02mm, to avoid vibration caused by shaft eccentricity, and a rubber lip-shaped sealing ring is used for sealing and protection.

[0033] Further, a threading hole 7 is formed in the side wall of the upper shell 1 for the passage of motor wires.

[0034] It should be noted that the sealing of the threading hole 7: single-wire hole: waterproof cable connector (such as M12 / M16 specification, protection level IP68), multi-wire hole: use multi-core cable + glue sealing (epoxy resin or polyurethane glue); the cable is equipped with a magnetic ring or the opening of the shell is covered with a conductive gasket, which can suppress electromagnetic interference.

[0035] Further, in order to make the connection and disconnection of the upper shell 1 and the lower shell 2 more convenient, a clamping piece 8 is connected to the bottom of the upper shell 1, a clamping groove 9 is formed in the top of the lower shell 2, the positions of the clamping piece 8 and the clamping groove 9 correspond, and the number of the clamping piece 8 and the clamping groove 9 in this embodiment is two; the bottom of the clamping piece 8 is connected to the bottom of the upper shell 1 through a connecting block 11, the inside of the clamping groove 9 is an arc-shaped groove, the shape of the clamping piece 8 matches the arc-shaped groove inside the clamping groove 9, elastic clamping plates 10 are connected to the opposite two side walls of the opening end of the clamping groove 9, the elastic clamping plates 10 are located inside the clamping groove 9 and are inclinedly arranged with the side walls of the clamping groove 9, the angle can be 25°, the end of the elastic clamping plate is designed with an R0.5 round corner to reduce stress concentration, and the material of the elastic clamping plate 10 can be selected from SUS304 or 17-7PH stainless steel, with an anti-fatigue strength improved by 30% (cycle life >10 5The surface electrolytic polishing (Ra≤0.4 μm) reduces the friction coefficient, the distance between the two elastic clamping plates 10 in the non-stressed state is less than the thickness of the clamping piece 8, the length of the two elastic clamping plates 10 is less than half of the length of the clamping groove 9, and one end is located on the side wall of the clamping groove 9, the distance between the two elastic clamping plates 10 in the non-stressed state can be less than the thickness of the connecting block 11, the length of the clamping piece 8 is equal to or less than the length of the elastic clamping plate 10, and the contact surface of the clamping piece and the elastic clamping plate is plated with a diamond-like carbon (DLC) coating (friction coefficient <0.1).

[0036] When the upper shell 1 is connected with the lower shell 2, the worker aligns the clamping piece 8 on the upper shell 1 with the two elastic clamping plates 10 of the clamping groove 9, presses downward, and makes the clamping piece 8 enter the clamping groove 9, so that the two elastic clamping plates 10 clamp the connecting block 11, the clamping piece 8 is fixed in the clamping groove 9 through the two elastic clamping plates 10, and the connection between the upper shell 1 and the lower shell 2 is completed.

[0037] It should be noted that, in order to ensure the sealing performance of the upper shell 1 and the lower shell 2 after being connected, a rectangular or dovetail groove can be processed on the joint surface of the upper shell 1 or the lower shell 2, and an O-ring (material: fluorine rubber / NBR, temperature resistance: -40~150℃) is embedded. In addition, in order to prevent the motor from vibrating when working and causing the clamping piece 8 to move to the side without the elastic clamping plate 10, a spring 12 is connected to the side wall of the clamping groove 9 without the elastic clamping plate 10. After the clamping piece 8 enters the clamping groove 9, the spring 12 limits the clamping piece 8. When the worker needs to disassemble, the upper shell 1 is moved to the side without the elastic clamping plate 10, the clamping piece 8 compresses the spring 12, and when the spring is completely compressed, the distance between the elastic clamping plate 10 and the end of the spring is greater than the length of the clamping piece 8, so that the clamping piece 8 can be taken out of the clamping groove 9. In addition, silicone damping agent (Shore hardness A40) can also be injected at the bottom of the clamping groove to absorb vibration energy.

[0038] The above only describes preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An electric machine protective enclosure, characterized in that, The utility model relates to a double -casing motor cooling device, including: Upper shell (1) and lower shell (2), upper shell (1) and lower shell (2) butt joint, the inside of upper shell (1) and lower shell (2) is provided with the cavity of accommodating motor, and the same side wall of upper shell (1) and lower shell (2) is provided with the aperture (3) jointly, The side wall of upper shell (1) and lower shell (2) is provided with a plurality of long strip through -hole, the long strip through -hole is connected with first radiating block (4) all, and the part of first radiating block (4) is located the outside of upper shell (1) or lower shell (2), The side wall of first radiating block (4) towards cavity is provided with recess (5), and recess (5) is connected with second radiating fast (6).

2. The motor protection enclosure of claim 1, wherein, The side wall of upper shell (1) is provided with threading hole (7).

3. The motor protection enclosure of claim 1, wherein, The bottom of upper shell (1) is connected with clamping piece (8), and the top of lower shell (2) is provided with clamping groove (9), when upper shell (1) and lower shell (2) butt joint, clamping piece (8) is clamped in clamping groove (9).

4. The motor protection enclosure of claim 3, wherein, The opposite two side walls of the opening end of clamping groove (9) are connected with elastic clamping plate (10), and elastic clamping plate (10) is located in clamping groove (9) and is arranged obliquely with the side wall of clamping groove (9).

5. The motor protection enclosure of claim 4, wherein, The length of elastic clamping plate (10) is less than half of the length of clamping groove (9).

6. The motor protection enclosure of claim 5, wherein, The side wall of clamping piece (8) is connected with connecting block (11), and connecting block (11) is connected with the bottom of upper shell (1).

7. The motor protection enclosure of claim 6, wherein, Clamping groove (9) is arc groove, and the shape of clamping piece (8) is matched with clamping groove (9).

8. The motor protection enclosure of claim 7, wherein, The length of clamping piece (8) is equal to or less than the length of elastic clamping plate (10).

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