A permanent magnet DC waterproof motor for aerial work vehicles

Abstract

The utility model provides a permanent magnet DC waterproof motor for aerial work vehicles, comprising a motor body and a front end cover installed at the front end of the motor body, the center of the front end cover is provided with a boss protruding outward, and the outer end of the front end cover is provided with a plurality of mounting blind holes at equal intervals along the circumferential direction with the boss as the center; a first annular groove is provided on the outer circumferential wall of the boss, and a first sealing ring is installed in the first annular groove; a second sealing ring is installed between the motor body and the front end cover, and a second annular groove is provided at one end of the front end cover facing the motor body, and the second sealing ring is installed in the second annular groove; the utility model provides a permanent magnet DC waterproof motor for aerial work vehicles, which overcomes the defect that the existing permanent magnet DC motor has poor waterproof performance.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a permanent magnet DC waterproof motor for an aerial work vehicle. Background Art

[0002] A permanent magnet DC motor is a DC motor that uses permanent magnets to establish an excitation magnetic field. This type of motor has no separate excitation system, so it is small in size, light in weight, simple in structure and high in efficiency. Most micro DC motors are permanent magnets, and the starting and operating characteristics of permanent magnet DC motors are basically the same as those of separately excited and shunt excited DC motors. In terms of structure, except that the stator part has no excitation winding, its armature, brushes, commutator and other parts are the same as those of current excitation DC motors.

[0003] With the increase in usage scenarios, people have put forward new requirements for the waterproof performance of permanent magnet DC motors. Existing permanent magnet DC motors still have the following defects in waterproof performance:

[0004] 1) The mounting hole on the front cover is a through hole, which is easy to leak water; the front cover is provided with a boss for cooperating with the external reducer, but there is no sealing structure at the boss, and the sealing performance is poor;

[0005] 2) The wire sheath is a hollow structure, and the wire is inserted into its hole. Water can easily enter from the wire sheath, and the waterproof performance is poor;

[0006] 3) The use of open brakes has poor waterproof performance; the brakes are fixed with ordinary screws, which are easy to get water in through the screw holes, and there is no sealing structure between the brake and the main body, so the sealing performance is poor;

[0007] 4) The main shell and the rear cover are fixed by ordinary screws, and there is no sealing structure between the two, so the waterproof performance is poor. Utility Model Content

[0008] 1. Technical issues to be resolved

[0009] The problem to be solved by the utility model is to provide a permanent magnet DC waterproof motor for an aerial work vehicle, so as to overcome the defect that the existing permanent magnet DC motor has poor waterproof performance.

[0010] (II) Technical solution

[0011] In order to solve the technical problem, the utility model provides a permanent magnet DC waterproof motor for an aerial work vehicle, comprising a motor body and a front end cover installed at the front end of the motor body, the center of the front end cover is provided with a boss protruding outward, and the outer end of the front end cover is provided with a plurality of mounting blind holes at equal intervals along the circumferential direction with the boss as the center; a first annular groove is provided on the outer circumferential wall of the boss, and a first sealing ring is installed in the first annular groove; a second sealing ring is installed between the motor body and the front end cover, and a second annular groove is provided at one end of the front end cover facing the motor body, and the second sealing ring is installed in the second annular groove.

[0012] In some embodiments, a sealed brake is installed at one end of the motor body away from the front end cover. A third sealing ring is installed between the brake and the motor body, and a third annular groove is provided at one end of the brake facing the motor body, and the third sealing ring is installed in the third annular groove.

[0013] In some embodiments, the brake is fixedly connected to the motor body through a first waterproof fastener, and the first waterproof fastener includes a first fastening screw and a first waterproof gasket mounted on the first fastening screw; a plurality of first mounting holes are arranged in a circular shape with equal intervals on the brake, and one end of the first waterproof fastener passes through the first mounting hole and is threadedly connected to the motor body.

[0014] In some embodiments, a wire sheath is installed on the motor body, and a wire is passed through the wire sheath; a solid sealing seat is provided at the connecting end of the wire sheath and the motor body, and the wire is electrically connected to the motor body after passing through the sealing seat, and the wire and the sealing seat are manufactured by integral injection molding.

[0015] In some embodiments, the motor body includes a main body shell and a rear cover shell fixed to the rear end of the main body shell, the front cover is fixed to the front end of the main body shell, the second sealing ring is installed between the front cover and the main body shell, and the sealing seat is installed between the main body shell and the rear cover shell. The rear cover shell is fixedly connected to the main body shell by a second waterproof fastener, and the second waterproof fastener includes a second fastening screw and a second waterproof gasket sleeved on the second fastening screw; the rear cover shell is symmetrically provided with a second mounting hole, and one end of the second waterproof fastener passes through the second mounting hole and is threadedly connected to the main body shell.

[0016] In some embodiments, a U-shaped groove for accommodating the sealing seat is formed on the rear cover shell, a U-shaped flange is provided on the inner wall of the U-shaped groove, and a U-shaped groove matching the U-shaped flange is provided on the outer wall of the sealing seat.

[0017] In some embodiments, a fourth sealing ring is installed between the main shell and the rear cover shell, and the fourth sealing ring is accommodated in a fourth annular groove. Part of the fourth annular groove is arranged on the rear cover shell, and the other part is arranged on the sealing seat.

[0018] In some embodiments, the motor body also includes a motor shaft, bearings are installed on the front end cover and the rear cover, and the motor shaft is installed between the two bearings; a rotor and a commutator are installed on the motor shaft, and a plurality of magnets are fixed on the inner wall of the main body shell at equal intervals in a ring shape, and the magnets correspond to the rotor; a brush holder is installed in the rear cover, and a plurality of carbon brushes are installed on the brush holder, and the carbon brushes are against the outer surface of the commutator.

[0019] (III) Beneficial effects

[0020] The utility model provides a permanent magnet DC waterproof motor for aerial work vehicles, which has the following advantages compared with the prior art:

[0021] 1) The mounting hole of the front cover adopts a blind hole to prevent water from entering through the mounting hole; a first sealing ring is installed on the outside of the front cover to improve the sealing between the boss and the reducer; the second sealing ring on the rear side can improve the sealing between the front cover and the motor body;

[0022] 2) A solid sealing seat is provided at the connection end of the wire sheath. The sealing seat and the wire are integrally injection molded, and the sealing performance is good; the sealing seat and the rear cover are installed through a U-shaped slot and a U-shaped flange, and the waterproof performance is good;

[0023] 3) The use of a closed brake effectively improves the sealing performance; adding a third sealing ring and using a first waterproof gasket can improve the sealing performance of the connection between the brake and the motor body, and the waterproof performance is better;

[0024] 4) The main shell and the rear cover are fixed with a second waterproof fastener, and a fourth sealing ring and a second waterproof gasket are provided, which can improve the sealing of the connection between the main shell and the rear cover, prevent water ingress, and have better waterproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a three-dimensional diagram of a permanent magnet DC waterproof motor for an aerial work vehicle of the utility model;

[0027] Figure 2 It is a stereoscopic diagram of another perspective of a permanent magnet DC waterproof motor for aerial work vehicles of the utility model;

[0028] Figure 3 This is an exploded view of a permanent magnet DC waterproof motor for an aerial work vehicle of the utility model;

[0029] Figure 4 This is a cross-sectional view of a permanent magnet DC waterproof motor for an aerial work vehicle of the utility model;

[0030] Figure 5 This is an exploded view of the front end cover and the motor body of a permanent magnet DC waterproof motor for an aerial work vehicle of the utility model;

[0031] Figure 6 This is a three-dimensional diagram of a front end cover of a permanent magnet DC waterproof motor for an aerial work vehicle of the utility model;

[0032] Figure 7 It is a three-dimensional diagram of another angle of view of the front end cover of a permanent magnet DC waterproof motor for an aerial work vehicle of the utility model;

[0033] Figure 8 This is an exploded view of a permanent magnet DC waterproof motor brake and a motor body of an aerial work vehicle of the utility model;

[0034] Fig. 9 This is a three-dimensional diagram of the connection between the sealing seat of a permanent magnet DC waterproof motor for an aerial work vehicle and a rear cover shell of the utility model;

[0035] Fig.10 This is an exploded view of a permanent magnet DC waterproof motor sealing seat, a rear cover and a brake of an aerial work vehicle of the utility model;

[0036] The names of the components corresponding to the reference numerals in the figure are: 1. motor body; 10. brush holder; 11. main body shell; 12. rear cover; 13. second waterproof fastener; 14. fourth sealing ring; 15. motor shaft; 16. bearing; 17. rotor; 18. commutator; 19. magnetic steel; 121. second mounting hole; 122. U-shaped groove; 123. U-shaped flange; 124. fourth annular groove; 131. second fastening screw; 132. second Waterproof gasket; 2. Front end cover; 21. First sealing ring; 22. Second sealing ring; 201. Boss; 202. Mounting blind hole; 203. First annular groove; 204. Second annular groove; 3. Brake; 31. Third sealing ring; 32. First waterproof fastener; 301. Third annular groove; 321. First fastening screw; 322. First waterproof gasket; 4. Wire sheath; 41. Wire; 42. Sealing seat; 421. U-shaped slot. DETAILED DESCRIPTION

[0037] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0039] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0040] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0041] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0042] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0043] See also Figures 1 to 10The utility model provides a permanent magnet DC waterproof motor for aerial work vehicles, comprising a motor body 1 and a front end cover 2 installed at the front end of the motor body 1. The center of the front end cover 2 is provided with a boss 201 protruding outward, and the boss 201 is used for installation with an external reducer. The outer end of the front end cover 2 is provided with a plurality of mounting blind holes 202 at equal intervals along the circumferential direction with the boss 201 as the center. The use of the mounting blind holes 202 can prevent water from entering the motor from the mounting hole, thereby improving the waterproof performance. A first annular groove 203 is provided on the outer circumferential wall of the boss 201, and a first sealing ring 21 is installed in the first annular groove 203. The addition of the first sealing ring 21 can effectively improve the sealing performance of the connection between the boss 201 and the reducer, and the waterproof performance is better. A second sealing ring 22 is installed between the motor body 1 and the front end cover 2, and a second annular groove 204 is provided at one end of the front end cover 2 facing the motor body 1, and the second sealing ring 22 is installed in the second annular groove 204. The second sealing ring 22 is added to improve the sealing performance of the connection between the front cover 2 and the motor body 1, and the waterproof effect is better.

[0044] In some embodiments, Figures 2 to 4 , Figure 8 and Fig.10 As shown, a closed brake 3 is installed at one end of the motor body 1 away from the front end cover 2. The closed brake 3 is used to replace the traditional open brake to improve the waterproof performance. Among them, the closed brake 3 structure is an integrated design of the outer sealing cover and the brake, and is combined with the third sealing ring 31 and the first waterproof fastener 32, so that the brake 3 has good waterproof performance. A third sealing ring 31 is installed between the brake 3 and the motor body 1, and a third annular groove 301 is provided at one end of the brake 3 facing the motor body 1, and the third sealing ring 31 is installed in the third annular groove 301. The addition of the third sealing ring 31 can ensure the sealing of the connection between the brake 3 and the motor body 1.

[0045] like Figure 2 and Figure 8 As shown, the brake 3 is fixedly connected to the motor body 1 through the first waterproof fastener 32, and the first waterproof fastener 32 includes a first fastening screw 321 and a first waterproof gasket 322 mounted on the first fastening screw 321; a plurality of first mounting holes 302 are arranged in an annular pattern at equal intervals on the brake 3, and one end of the first waterproof fastener 32 passes through the first mounting hole 302 and is threadedly connected to the motor body 1, and the motor body 1 is provided with a threaded hole corresponding to the first mounting hole 302. The first waterproof fastener 32 is used for fixing, and the first waterproof gasket 322 can ensure the sealing of the connection between the brake 3 and the motor body 1.

[0046] In some embodiments, Figure 2 and Figure 3As shown, a wire sheath 4 is installed on the motor body 1, and a wire 41 is inserted into the wire sheath 4; a solid sealing seat 42 is provided at the connection end between the wire sheath 4 and the motor body 1, and the wire 41 is electrically connected to the motor body 1 after passing through the sealing seat 42, and the wire 41 and the sealing seat 42 are manufactured by integral injection molding. In this structure, a solid sealing seat is provided at the connection end of the wire sheath, and the sealing seat and the wire are integrally injection molded, and the sealing performance is good.

[0047] In some embodiments, Figure 2 and Figure 3 As shown, the motor body 1 includes a main housing 11 and a rear housing 12 fixed at the rear end of the main housing 11, a front cover 2 fixed at the front end of the main housing 11, a second sealing ring 22 installed between the front cover 2 and the main housing 11, and a sealing seat 42 installed between the main housing 11 and the rear housing 12. The rear housing 12 is fixedly connected to the main housing 11 through a second waterproof fastener 13, and the second waterproof fastener 13 includes a second fastening screw 131 and a second waterproof gasket 132 sleeved on the second fastening screw 131; the rear housing 12 is symmetrically provided with a second mounting hole 121, and one end of the second waterproof fastener 13 passes through the second mounting hole 121 and is threadedly connected to the main housing 11. The second waterproof fastener 13 is used for fixing, and the second waterproof gasket 132 can ensure the sealing of the connection between the main housing 11 and the rear housing 12.

[0048] In some embodiments, Fig. 9 and Fig.10 As shown, a U-shaped groove 122 for accommodating the sealing seat 42 is formed on the rear cover 12, a U-shaped flange 123 is provided on the inner wall of the U-shaped groove 122, and a U-shaped groove 421 matching with the U-shaped flange 123 is provided on the outer wall of the sealing seat 42, and the U-shaped flange 123 is placed in the U-shaped groove 421. In this structure, the sealing seat and the rear cover are installed through the U-shaped groove and the U-shaped flange, and the waterproof performance is good.

[0049] In some embodiments, Figure 4 , Fig. 9 and Fig.10 As shown, a fourth sealing ring 14 is installed between the main housing 11 and the rear housing 12, and the fourth sealing ring 14 is accommodated in a fourth annular groove 124, and a portion of the fourth annular groove 124 is arranged on the rear housing 12, and another portion is arranged on the sealing seat 42. The fourth sealing ring 14 is added to ensure the sealing of the connection between the main housing 11 and the rear housing 12.

[0050] In some embodiments, Figure 3 and Figure 4As shown, the motor body 1 also includes a motor shaft 15, and bearings 16 are installed on the front end cover 2 and the rear cover shell 12, and the motor shaft 15 is installed between the two bearings 16; a rotor 17 and a commutator 18 are installed on the motor shaft 15, and a plurality of magnets 19 are fixed in an annular manner with equal intervals on the inner wall of the main shell 11, and the magnets 19 correspond to the rotor 17; a brush holder 10 is installed in the rear cover shell 12, and a plurality of carbon brushes are installed on the brush holder 10, and the carbon brushes are against the outer surface of the commutator 18.

[0051] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0052] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A permanent magnet DC waterproof motor for an aerial work vehicle, comprising a motor body (1) and a front end cover (2) mounted at the front end of the motor body (1), characterized in that: A boss (201) is provided at the center of the front end cover (2) protruding outward, and a plurality of mounting blind holes (202) are provided at equal intervals along the circumferential direction with the boss (201) as the center at the outer end of the front end cover (2); a first annular groove (203) is provided on the outer circumferential wall of the boss (201), and a first sealing ring (21) is installed in the first annular groove (203); a second sealing ring (22) is installed between the motor body (1) and the front end cover (2), and a second annular groove (204) is provided at one end of the front end cover (2) facing the motor body (1), and the second sealing ring (22) is installed in the second annular groove (204).

2. The permanent magnet DC waterproof motor for aerial work vehicles according to claim 1, characterized in that: A sealed brake (3) is installed at one end of the motor body (1) away from the front end cover (2).

3. The permanent magnet DC waterproof motor for aerial work vehicles as claimed in claim 2, characterized in that: A third sealing ring (31) is installed between the brake (3) and the motor body (1); a third annular groove (301) is provided at one end of the brake (3) facing the motor body (1); and the third sealing ring (31) is installed in the third annular groove (301).

4. The permanent magnet DC waterproof motor for aerial work vehicles as claimed in claim 2, characterized in that: The brake (3) is fixedly connected to the motor body (1) via a first waterproof fastener (32), wherein the first waterproof fastener (32) comprises a first fastening screw (321) and a first waterproof gasket (322) sleeved on the first fastening screw (321); a plurality of first mounting holes (302) are arranged in an annular pattern at equal intervals on the brake (3), and one end of the first waterproof fastener (32) passes through the first mounting hole (302) and is threadedly connected to the motor body (1).

5. The permanent magnet DC waterproof motor for aerial work vehicles according to claim 1, characterized in that: A wire sheath (4) is installed on the motor body (1), and a wire (41) is inserted into the wire sheath (4); a solid sealing seat (42) is provided at the connection end between the wire sheath (4) and the motor body (1); the wire (41) is electrically connected to the motor body (1) after passing through the sealing seat (42); the wire (41) and the sealing seat (42) are manufactured by integral injection molding.

6. The permanent magnet DC waterproof motor for aerial work vehicles as claimed in claim 5, characterized in that: The motor body (1) comprises a main shell (11) and a rear cover shell (12) fixed at the rear end of the main shell (11); the front end cover (2) is fixed at the front end of the main shell (11); the second sealing ring (22) is installed between the front end cover (2) and the main shell (11); and the sealing seat (42) is installed between the main shell (11) and the rear cover shell (12).

7. The permanent magnet DC waterproof motor for aerial work vehicles as claimed in claim 6, characterized in that: The rear cover shell (12) is fixedly connected to the main shell (11) via a second waterproof fastener (13), wherein the second waterproof fastener (13) comprises a second fastening screw (131) and a second waterproof gasket (132) sleeved on the second fastening screw (131); second mounting holes (121) are symmetrically arranged on the rear cover shell (12), and one end of the second waterproof fastener (13) passes through the second mounting hole (121) and is threadedly connected to the main shell (11).

8. The permanent magnet DC waterproof motor for aerial work vehicles as claimed in claim 6, characterized in that: A U-shaped groove (122) for accommodating the sealing seat (42) is formed inwardly on the rear cover shell (12), a U-shaped flange (123) is arranged on the inner wall of the U-shaped groove (122), and a U-shaped slot (421) matching with the U-shaped flange (123) is arranged on the outer wall of the sealing seat (42).

9. The permanent magnet DC waterproof motor for aerial work vehicles as claimed in claim 8, characterized in that: A fourth sealing ring (14) is installed between the main shell (11) and the rear cover shell (12), and the fourth sealing ring (14) is accommodated in a fourth annular groove (124). Part of the fourth annular groove (124) is arranged on the rear cover shell (12), and the other part is arranged on the sealing seat (42).

10. The permanent magnet DC waterproof motor for aerial work vehicles as claimed in claim 6, characterized in that: The motor body (1) also includes a motor shaft (15), and bearings (16) are installed on both the front cover (2) and the rear cover (12), and the motor shaft (15) is installed between the two bearings (16); a rotor (17) and a commutator (18) are installed on the motor shaft (15), and a plurality of magnets (19) are fixed at equal intervals in an annular manner on the inner wall of the main housing (11), and the magnets (19) correspond to the rotor (17); a brush holder (10) is installed in the rear cover (12), and a plurality of carbon brushes are installed on the brush holder (10), and the carbon brushes are abutted against the outer surface of the commutator (18).

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