CN220232936U

CN220232936U - Firm three proofings condenser box of connection

Info

Publication number: CN220232936U
Application number: CN202321807407.6U
Authority: CN
Inventors: 徐东旭; 乔凯
Original assignee: Weihai Xu's Motor Technology Research Institute (general Partnership)
Current assignee: Weihai Xu's Motor Technology Research Institute (general Partnership)
Priority date: 2023-07-11
Filing date: 2023-07-11
Publication date: 2023-12-22
Anticipated expiration: 2033-07-11

Abstract

The utility model discloses a firmly-connected three-proofing capacitor box, which comprises a capacitor box body and a capacitor box cover, wherein a special-shaped dovetail bracket is formed on the capacitor box body and is respectively in movable fit with a left bracket base and a right bracket base which are arranged on a motor shell, one end of the special-shaped dovetail bracket is a limiting contact surface, an inner connecting hole is formed in the limiting contact surface, and a pull-out connecting port for penetrating through a connecting wire rod and installing a locking part for fastening the wire rod is formed in a cladding surface of the capacitor box cover; the capacitor box body is convenient to slidingly connect and disassemble with the support base, the capacitor box body is skillfully heightened to improve heat dissipation performance, when the capacitor box body is acted by tensile force, the stress transition is more natural, the bearing capacity is stronger, in addition, the protection grade of IP55 is provided, the capacitor box cover is connected and pulled without falling off to effectively prevent wires from loosening, so that the capacitor box has the anti-loosening capacity, and finally, the novel three proofings of water proofing, dust proofing and anti-loosening are achieved.

Description

Firm three proofings condenser box of connection

Technical Field

The utility model relates to a capacitor box, in particular to a three-proofing capacitor box with firm connection.

Background

A common YL double-value capacitor running motor is provided with a capacitor box for accommodating a capacitor and connecting wires thereof at the left and right of the upper end outside a shell, and the common capacitor box is installed in two modes:

one is to design the capacitor box to be suitable for the shape of the installation part of the motor, and install the capacitor box on the shell of the motor directly, the installation mode has the problem that the heat from the motor is easy to conduct, so that the heat dissipation of the motor is influenced when the capacitor box and the internal capacitor are overheated;

the other is to raise the capacitor box through the metal bracket, the lower side of the metal bracket is connected with the motor, and the capacitor box is carried on the metal bracket, so that the heat dissipation problem of the first direct installation mode is solved, but the wire outgoing of the capacitor wire is blocked by the connection mode of the metal bracket and the two ends of the capacitor box, so that the wire has to be twisted for installation, the appearance of the exposed wire is affected, the service life of the wire is also affected, in addition, the installation mode brings new problems, namely, in the transportation and daily handling processes of the motor, due to the convenience of the force application position, operators are extremely used to lifting or holding the capacitor box to lift the motor, the capacitor box is very easy to damage, the capacitor box is not always fresh, and the capacitor box is not taken as an object of bearing force, but due to the unavoidable nature of the actual situation, the bearing capacity and the holding convenience of the capacitor box are required to be improved.

In addition, the present capacitor box has two major drawbacks:

1. in the daily use scene, the running environment that the motor is located is abominable, consequently put forward the test to the protective capability of capacitor box, current capacitor box protection level is generally at IP44, can't provide the guarantee to self operation in being in abominable environment for a long time.

2. The wire rod that does not possess to the capacitor box has effectual locking protection that moves, in the daily operation of motor, often need carry out parameter adjustment to the terminal box between the capacitor box of both sides, need adjust, drag the wire rod that the terminal box is connected, if the capacitor box does not possess the locking protection to the wire rod, will cause the damage of capacitor device, also can damage the outlet of capacitor box.

Disclosure of Invention

In order to solve the defects of the technology, the utility model provides the three-proofing capacitor box which is firmly connected.

In order to solve the technical problems, the utility model adopts the following technical scheme: the capacitor box comprises a capacitor box body which forms a capacitor box body cavity and is provided with an opening at one side, and a capacitor box cover which is tightly matched with the opening;

the outer wall of the capacitor box body is provided with a special-shaped dovetail bracket which can be respectively movably matched with a left bracket base and a right bracket base which are arranged on the motor shell, one end of the special-shaped dovetail bracket is a limiting contact surface, and an inner connecting hole is formed in the limiting contact surface;

the cladding surface of the capacitor box cover is provided with a pull-out-free connecting port which is used for penetrating through the connecting wire rod and installing a locking part for fastening the wire rod.

Further, a circle of concave rabbets with the diameter slightly larger than the diameter of the cavity of the capacitor box body are formed at the opening of the capacitor box body;

the capacitor box cover is provided with a circle of side wall-shaped convex bulge openings, and the convex bulge openings are clamped or in threaded connection with the concave rabbets.

Further, the shaped dovetail bracket is formed with a long arc side and a short arc side, respectively.

Further, a circle of thickened connecting parts integrally connected with the cladding surface are formed on the outer side of the circumference of the pull-out-free connecting port, and the thickened connecting parts extend to two sides in thickness.

Further, the left bracket base and the right bracket base have the same structure and are respectively arranged symmetrically on the left side and the right side of the upper end of the motor.

Further, a left-tilting special-shaped dovetail groove which is used for accommodating the special-shaped dovetail bracket in a sliding fit mode and is opened at one end side is formed in the left bracket base, and the other end of the left-tilting special-shaped dovetail groove is a left stroke limiting part;

the upper part of the left-inclined special-shaped dovetail groove is provided with a left-inclined long arc connecting side wall which is in close contact connection with the long arc side, and the upper part of the left-inclined special-shaped dovetail groove is also provided with a left-inclined short arc connecting side wall which is in close contact connection with the short arc side;

the left travel limiting part is abutted with the limiting contact surface, and a left outer connecting hole corresponding to the inner connecting hole is further formed in the left travel limiting part.

Further, the outer side surface of the notch of the left bracket base positioned in the left inclined special-shaped dovetail groove is a left box body arc-shaped veneer, and the shape of the connecting position of the left box body arc-shaped veneer and the capacitor box body is matched;

the outer side surface of the left bracket base, which is positioned at the bottom of the left inclined special-shaped dovetail groove, is provided with a left machine body arc-shaped veneer, and the shape of the connecting position of the left machine body arc-shaped veneer and the motor is matched;

the bottom of the left inclined special-shaped dovetail groove is provided with a left bracket base body fixing hole for fixedly connecting the left bracket base with the motor.

Further, a right-inclined special-shaped dovetail groove which is used for accommodating the special-shaped dovetail bracket in sliding fit and is opened at one end side is formed in the right bracket base, and the other end of the right-inclined special-shaped dovetail groove is a right stroke limiting part;

the upper part of the right-inclined special-shaped dovetail groove is provided with a right-inclined long arc connecting side wall which is in close contact connection with the long arc side, and the upper part of the right-inclined special-shaped dovetail groove is also provided with a right-inclined short arc connecting side wall which is in close contact connection with the short arc side;

the right stroke limiting part is abutted with the limiting contact surface, and a right outer connecting hole corresponding to the inner connecting hole is further formed in the right stroke limiting part.

Further, the outer side surface of the notch of the right bracket base positioned in the right inclined special-shaped dovetail groove is an arc-shaped veneering of the right box body, and the arc-shaped veneering of the right box body is matched with the shape of the connecting position of the capacitor box body;

the outer side surface of the right bracket base, which is positioned at the bottom of the right inclined special-shaped dovetail groove, is provided with a right machine body arc-shaped veneer, and the shape of the connection position of the right machine body arc-shaped veneer and the motor is matched;

the bottom of the right inclined special-shaped dovetail groove is provided with a right frame base body fixing hole for fixedly connecting the right frame base with the motor.

The utility model discloses a three-proofing capacitor box with firm connection, which is matched with bracket bases on the left side and the right side in a sliding connection way by arranging a special-shaped dovetail bracket connected to a capacitor box body, is more convenient to mount and dismount, skillfully heightens the capacitor box body in the connection way to improve heat dissipation performance, ensures that the capacitor box body has more natural stress transition and stronger bearing capacity when a tensile force acts on the capacitor box body in the connection way, and ensures that the capacitor box has waterproof and dustproof capacities by the split matching of the capacitor box body and a capacitor box cover, has IP55 protection grade, and ensures that the capacitor box has anti-loosening capacity by connecting and pulling the capacitor box cover to effectively prevent wires from loosening, thereby finally achieving new three-proofing waterproof, dustproof and anti-loosening performances.

Drawings

Fig. 1 is a schematic axial structure of a capacitor case according to the present utility model.

Fig. 2 is a top view of the capacitor box of the present utility model.

Fig. 3 is a front view of the cover of the capacitor of the present utility model.

Fig. 4 is a schematic axial structure of the capacitor box cover of the present utility model.

Fig. 5 is a schematic axial side structure of the left bracket base of the present utility model.

Fig. 6 is a bottom view of the left bracket base of the present utility model.

Fig. 7 is a front view of the left bracket base of the present utility model.

Fig. 8 is a schematic axial side structure of the right bracket base of the present utility model.

Fig. 9 is a top view of the right bracket base of the present utility model.

Fig. 10 is a front view of the right bracket base of the present utility model.

Fig. 11 is a bottom view of the right bracket base of the present utility model.

In the figure: 10. a capacitor box; 11. a capacitor case cavity; 12. a special-shaped dovetail bracket; 13. a concave spigot; 14. limiting contact surfaces; 15. an inner connecting hole; 16. long arc sides; 17. a short arc side;

20. a capacitor box cover; 21. coating the surface; 22. a convex drum opening; 23. the connecting port is not pulled out; 24. thickening the connecting part;

30. a left bracket base; 31. a left-leaning special-shaped dovetail groove; 32. the left inclined long arc is connected with the side wall; 33. the left inclined short arc is connected with the side wall; 34. a left outer connecting hole; 35. a left frame base body fixing hole; 36. arc-shaped veneering of the left box body; 37. a left stroke limit part; 38. arc facing of the left machine body;

40. a right bracket base; 41. right-leaning special-shaped dovetail grooves; 42. the right inclined long arc is connected with the side wall; 43. the right inclined short arc is connected with the side wall; 44. a right outer connection hole; 45. a right frame base body fixing hole; 46. arc veneering of the right box body; 47. a right stroke limit part; 48. arc facing of right body.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the detailed description.

The embodiment is a firmly-connected three-proofing capacitor box, which comprises a capacitor box body 10 with a capacitor box body cavity 11 formed and one side being open, and a capacitor box cover 20 tightly matched at the opening, wherein a capacitor device is accommodated in the capacitor box body cavity 11, and in addition, in order to facilitate the grasping of operators when the operators cannot go, the capacitor box body 10 is preferably cylindrical so as to adapt to hands.

In order to improve the protection level to IP55, the opening of the capacitor box 10 is formed with a circle of concave seam allowance 13 with a diameter slightly larger than the diameter of the capacitor box cavity 11, the capacitor box cover 20 is formed with a circle of side wall-shaped convex seam allowance 22, and the convex seam allowance 22 is clamped or in threaded connection with the concave seam allowance 13, so that the capacitor box 10 and the capacitor box cover 20 are in fastening fit to achieve the protection level of IP55, in the actual use scene, a sealing ring or a sealing gasket can be configured at the connection position of the concave seam allowance 13 and the convex seam allowance 22 to strengthen the sealing effect between the concave seam allowance 13 and the convex seam allowance 22, and the sealing ring and the sealing gasket are of the prior art and are not technical characteristics which need to be protected in the application, so that the assembly of the sealing ring and the sealing gasket is a common setting mode mastered by a person skilled in the art, and then, when the convex seam allowance 22 is in threaded connection with the concave seam allowance 13, the convex seam allowance 22 and the concave seam allowance 13 are respectively provided with matched pipe threads.

The outer wall of the capacitor box body 10 is provided with a special-shaped dovetail bracket 12, the special-shaped dovetail bracket 12 extends along the length direction of the capacitor box body 10, the special-shaped dovetail bracket 12 can be respectively movably matched with a left bracket base 30 and a right bracket base 40 which are arranged on a motor shell, the left bracket base 30 and the right bracket base 40 have the same structure and are respectively arranged on the left side and the right side of the upper end of the motor symmetrically, the special-shaped dovetail bracket 12 matched on the left bracket base 30 and the special-shaped dovetail bracket 12 matched on the right bracket base 40 are mutually symmetrical, and the capacitor box bodies 10 on two sides are respectively lifted by the left bracket base 30 and the right bracket base 40 so as to prevent the capacitor box 10 from being influenced by heat of the motor, and meanwhile, the heat dissipation of the motor is not influenced by the motor due to the fact that the motor is tightly attached to the motor.

The explanation of the left and right sides of the upper end of the motor is specifically given by the left hand being left and the right hand being right when viewed from the shaft end of the motor to the other end.

Preferably, the shaped dovetail bracket 12 is formed with a long arc side 16 and a short arc side 17, respectively, and based on the description of the above symmetrical structure, it is understood that in the case that the left and right sides of the shaped dovetail bracket 12 on the left side are the long arc side 16 and the short arc side 17, respectively, the left and right sides of the shaped dovetail bracket 12 on the right side are the short arc side 17 and the long arc side 16, respectively.

Further, one end of the special-shaped dovetail bracket 12 is a limiting contact surface 14, and an inner connecting hole 15 is formed in the limiting contact surface 14.

The cladding surface 21 of the capacitor box cover 20 is provided with a pull-out connecting port 23 for penetrating and connecting wires and installing a locking part for fastening the wires, threads are arranged in the pull-out connecting port 23, the locking part is specifically pull-out, a pull-out female seat is in threaded connection in the pull-out connecting port 23, the wires pass through an opening of the pull-out female seat, then a circle of thickened connecting part 24 integrally connected with the cladding surface 21 is formed on the circumferential outer side of the pull-out connecting port 23, the thickened connecting part 24 extends to two sides, the number of turns of the threads in the pull-out connecting port 23 is increased through the arrangement of the thickened connecting part 24, the connection of the pull-out female seat in the pull-out connecting port 23 is firmer, the wire is prevented from being loose badly in the use process through the cooperation of the structure and pull-out, the wire is not twisted, the wire is prevented from being damaged effectively, the length of the exposed wire part is also locked and controlled through pull-out, and the outer part is tidy and attractive.

The inside of the left bracket base 30 is provided with a left-leaning special-shaped dovetail groove 31 which is used for accommodating the special-shaped dovetail bracket 12 in a sliding fit manner and is opened at one end side, the other end of the left-leaning special-shaped dovetail groove 31 is provided with a left-stroke limiting part 37, so that the special-shaped dovetail bracket 12 enters the left-leaning special-shaped dovetail groove 31 from one opened end and slides to the left-stroke limiting part 37 to be at the end, at the moment, the left-stroke limiting part 37 is abutted against the limiting contact surface 14, and the left-stroke limiting part 37 is provided with a left-outer connecting hole 34 corresponding to the inner connecting hole 15.

Further, the upper portion of the left-leaning special-shaped dovetail groove 31 is formed with a left-leaning long arc connecting side wall 32 which is tightly connected with the long arc side 16, the upper portion of the left-leaning special-shaped dovetail groove 31 is also formed with a left-leaning short arc connecting side wall 33 which is tightly connected with the short arc side 17, when the capacitor box 10 on the left side is subjected to external tension, the stress connection part is the connection part of the left-leaning special-shaped dovetail groove 31 and the special-shaped dovetail bracket 12, namely the connection surface of the long arc side 16 and the left-leaning long arc connecting side wall 32, and the connection surface of the short arc side 17 and the left-leaning short arc connecting side wall 33, and the stress transition is more natural and the connection tightness is improved through the tightly connected in an arc matching way.

Preferably, the outer side surface of the notch of the left bracket base 30 positioned in the left inclined special-shaped dovetail groove 31 is a left box body arc-shaped veneering 36, and the shape of the connecting position of the left box body arc-shaped veneering 36 and the capacitor box body 10 is matched, so that the left bracket base 30 and the capacitor box body 10 are more attached and more attractive;

preferably, the outer side surface of the left bracket base 30, which is positioned at the bottom of the left inclined special-shaped dovetail groove 31, is provided with a left machine body arc-shaped veneering 38, and the shape of the connecting position of the left machine body arc-shaped veneering 38 and the motor is matched, so that the left bracket base 30 is more attached to the motor and is more attractive.

Further, a left bracket base body fixing hole 35 for fastening the left bracket base 30 and the motor is formed in the bottom of the left inclined shaped dovetail groove 31, and the left bracket base 30 is fixed on the housing of the motor through bolts.

The inside of the right bracket base 40 is provided with a right-leaning special-shaped dovetail groove 41 which is used for accommodating the special-shaped dovetail bracket 12 in a sliding fit manner and is opened at one end side, the other end of the right-leaning special-shaped dovetail groove 41 is provided with a right-stroke limiting part 47, so that the special-shaped dovetail bracket 12 enters the right-leaning special-shaped dovetail groove 41 from one opened end and slides to the right-stroke limiting part 47 to be at the end, at the moment, the right-stroke limiting part 47 is abutted against the limiting contact surface 14, and the right-stroke limiting part 47 is provided with a right-outer connecting hole 44 corresponding to the inner connecting hole 15.

Further, the upper portion of the right-leaning special-shaped dovetail groove 41 is formed with a right-leaning long arc connecting side wall 42 which is tightly connected with the long arc side 16, the upper portion of the right-leaning special-shaped dovetail groove 41 is also formed with a right-leaning short arc connecting side wall 43 which is tightly connected with the short arc side 17, when the capacitor box 10 on the right side is subjected to external tension, the stress connection part is the connection part of the right-leaning special-shaped dovetail groove 41 and the special-shaped dovetail bracket 12, namely the connection surface of the long arc side 16 and the right-leaning long arc connecting side wall 42, and the connection surface of the short arc side 17 and the right-leaning short arc connecting side wall 43, and the stress transition is more natural and the connection tightness is improved through the tight connection of radian matching.

Preferably, the outer side surface of the notch of the right bracket base 40 positioned in the right inclined special-shaped dovetail groove 41 is provided with a right box body arc-shaped veneering 46, and the shape of the connecting position of the right box body arc-shaped veneering 46 and the capacitor box body 10 is matched, so that the right bracket base 40 is more attached to the capacitor box body 10 and is more attractive;

preferably, the outer side surface of the right bracket base 40, which is positioned at the bottom of the right inclined special-shaped dovetail groove 41, is provided with a right machine body arc-shaped veneering 48, and the shape of the connection position of the right machine body arc-shaped veneering 48 and the motor is matched, so that the right bracket base 40 is more attached to the motor and is more attractive.

Further, a right bracket base body fixing hole 45 for fastening the right bracket base 40 to the motor is formed in the bottom of the right inclined shaped dovetail groove 41, and the right bracket base 40 is fixed to the housing of the motor by bolts.

The installation flow of the firmly-connected three-proofing capacitor box specifically comprises the following steps:

firstly, placing a capacitor device in a cavity 11 of a capacitor box body, passing a wire through a pull-out connection port 23, and locking the wire on the port of the pull-out connection port 23 by utilizing a pull-out thread connection;

secondly, the left capacitor box body 10 is slidably matched with the left inclined special-shaped dovetail groove 31 through the special-shaped dovetail bracket 12 so as to be arranged on the left bracket base 30, and then self-tapping screws sequentially penetrate through the left outer connecting hole 34 and the inner connecting hole 15, so that the special-shaped dovetail bracket 12 and the left inclined special-shaped dovetail groove 31 cannot slip;

finally, the right capacitor box body 10 is slidably matched with the right inclined special-shaped dovetail groove 41 through the special-shaped dovetail bracket 12 to be installed on the right bracket base 40, and then the capacitor box body sequentially passes through the right outer connecting hole 44 and the inner connecting hole 15 by utilizing self-tapping screws, so that the special-shaped dovetail bracket 12 and the right inclined special-shaped dovetail groove 41 cannot slip;

the installation process and the disassembly process are completed, and vice versa.

Therefore, the three-proofing capacitor box with firm connection is matched with the bracket bases on the left side and the right side in a sliding connection mode by arranging the special-shaped dovetail brackets connected to the capacitor box body, the installation and the disassembly are more convenient, the capacitor box body is skillfully heightened by the connection mode to improve the heat dissipation performance, when the capacitor box body is acted by tensile force by the connection mode, the stress transition is more natural, the bearing capacity is stronger, in addition, the capacitor box is provided with waterproof and dustproof capacities by the split matching of the capacitor box body and the capacitor box cover, the protection grade of IP55 is provided, the capacitor box is provided with the anti-loosening capacity by the connection and the pull-out of the capacitor box cover to effectively prevent wires from loosening, and finally, the novel three-proofing of waterproof, dustproof and anti-loosening can be achieved.

The above embodiments are not intended to limit the present utility model, and the present utility model is not limited to the above examples, but is also intended to be limited to the following claims.

Claims

1. The utility model provides a firm three proofings capacitor box of connection which characterized in that: the capacitor box comprises a capacitor box body (10) which forms a capacitor box body cavity (11) and is opened at one side and a capacitor box cover (20) which is tightly matched at the opening;

the capacitor box comprises a capacitor box body (10), wherein a special-shaped dovetail bracket (12) is formed on the outer wall of the capacitor box body (10), the special-shaped dovetail bracket (12) can be respectively in movable fit with a left bracket base (30) and a right bracket base (40) which are arranged on a motor shell, one end of the special-shaped dovetail bracket (12) is a limiting contact surface (14), and an inner connecting hole (15) is formed in the limiting contact surface (14);

a cover surface (21) of the capacitor box cover (20) is provided with a pull-out-preventing connecting port (23) for penetrating through the connecting wire rod and installing a locking component for fastening the wire rod.

2. The securely-attached tri-proof capacitor box of claim 1, wherein: a circle of concave rabbets (13) with the diameters slightly larger than those of the capacitor box cavities (11) are formed at the opening of the capacitor box body (10);

the capacitor box cover (20) is provided with a circle of side wall-shaped convex drum openings (22), and the convex drum openings (22) are clamped or in threaded connection with the concave rabbets (13).

3. The securely-attached tri-proof capacitor box of claim 1, wherein: the special-shaped dovetail bracket (12) is respectively formed with a long arc-shaped side (16) and a short arc-shaped side (17).

4. The securely-attached tri-proof capacitor box of claim 2, wherein: the periphery outside of the pull-out-free connecting port (23) is provided with a circle of thickened connecting part (24) integrally connected with the cladding surface (21), and the thickened connecting part (24) is provided with thickness extension towards two sides.

5. The securely-attached tri-proof capacitor box of claim 1, wherein: the left bracket base (30) and the right bracket base (40) have the same structure and are respectively arranged symmetrically on the left side and the right side of the upper end of the motor.

6. A firmly-coupled tri-proof capacitor box as claimed in claim 3, wherein: a left-inclined special-shaped dovetail groove (31) which is used for accommodating the special-shaped dovetail bracket (12) in sliding fit and is open at one end side is formed in the left bracket base (30), and the other end of the left-inclined special-shaped dovetail groove (31) is provided with a left stroke limiting part (37);

the upper part of the left-inclined special-shaped dovetail groove (31) is provided with a left-inclined long-arc connecting side wall (32) which is tightly connected with the long-arc side (16), and the upper part of the left-inclined special-shaped dovetail groove (31) is also provided with a left-inclined short-arc connecting side wall (33) which is tightly connected with the short-arc side (17);

the left travel limiting part (37) is abutted with the limiting contact surface (14), and the left travel limiting part (37) is also provided with a left outer connecting hole (34) corresponding to the inner connecting hole (15).

7. The securely-attached tri-proof capacitor box of claim 6, wherein: the outer side surface of the notch of the left bracket base (30) positioned in the left inclined special-shaped dovetail groove (31) is provided with a left box body arc-shaped veneer (36), and the shape of the connecting position of the left box body arc-shaped veneer (36) and the capacitor box body (10) is matched;

the outer side surface of the left bracket base (30) positioned at the bottom of the left inclined special-shaped dovetail groove (31) is provided with a left machine body arc-shaped veneering (38), and the shape of the connecting position of the left machine body arc-shaped veneering (38) is matched with that of the motor;

a left bracket base body fixing hole (35) for fixedly connecting the left bracket base (30) with the motor is formed in the bottom of the left inclined special-shaped dovetail groove (31).

8. A firmly-coupled tri-proof capacitor box as claimed in claim 3, wherein: a right-leaning special-shaped dovetail groove (41) which is used for accommodating the special-shaped dovetail bracket (12) in sliding fit and is opened at one end side is formed in the right bracket base (40), and the other end of the right-leaning special-shaped dovetail groove (41) is provided with a right stroke limiting part (47);

the upper part of the right inclined special-shaped dovetail groove (41) is provided with a right inclined long arc connecting side wall (42) which is tightly connected with the long arc side (16), and the upper part of the right inclined special-shaped dovetail groove (41) is also provided with a right inclined short arc connecting side wall (43) which is tightly connected with the short arc side (17);

the right stroke limiting part (47) is abutted with the limiting contact surface (14), and the right stroke limiting part (47) is also provided with a right outer connecting hole (44) corresponding to the inner connecting hole (15).

9. The securely-attached tri-proof capacitor box of claim 8, wherein: the outer side surface of the notch of the right bracket base (40) positioned in the right inclined special-shaped dovetail groove (41) is provided with a right box body arc-shaped veneering surface (46), and the shape of the connecting position of the right box body arc-shaped veneering surface (46) and the capacitor box body (10) is matched;

the outer side surface of the right bracket base (40) positioned at the bottom of the right inclined special-shaped dovetail groove (41) is provided with a right machine body arc-shaped veneering (48), and the shape of the connecting position of the right machine body arc-shaped veneering (48) and the motor is matched;

a right frame base body fixing hole (45) for fixedly connecting the right frame base (40) with the motor is formed in the bottom of the right inclined special-shaped dovetail groove (41).